hoist crane, gantry crane,overhead gantry crane: 2013

2013年12月25日星期三

To improve the national economy of hoisting machinery

Hoisting machinery sectors of the national economy to improve labor productivity, shortening production cycle and reduce production cost, should not be underestimated role, and therefore is widely used in various types of production enterprises. The pros and cons of hoisting machinery manufacturing quality and use of security technology condition quality directly bridge gantry crane the state property and the safety of life of the masses. In order to strengthen the safety supervision of special equipment, to prevent and reduce accidents, guarantee the people life and property safety, promote economic development, 373 decree of the state council has issued a "special equipment safety supervision regulations", made clear of overhead gantry crane equipment in the design, manufacture, installation, use, inspection, maintenance, renovation and other aspects of the safety supervision management.

2013年12月20日星期五

The crane system's work efficiency

The swing on the one hand, lowers the crane system's work efficiency, on the other hand may lead to load with the operator or other objects collide cause casualties or damage. Therefore, many scholars in view of the bridge crane control system for a overhead gantry crane amount of research work: on the one hand require car quickly and accurately reach the target location, on the other hand it also requires can effectively restrain the load swing. The most commonly used open-loop bridge crane control method is the Input Shaping (Input Shaping), but this bridge gantry crane of method for system parameter precision demand is higher, so more and more scholars closed-loop control is used to solve the problem of oscillation inhibition and car positioning. .

2013年12月18日星期三

Simple electric hoist gantry crane is a crane

Simple electric hoist gantry crane is a crane, which has two kinds of single and double beam. Because of its simple structure, easy manufacture, light weight, low cost, easy installation and maintenance overhead gantry crane obtained the considerable development, widely used in industrial and mining enterprises, railways, docks, warehouses, material yard and other places. Because of electric hoist gantry crane structure is simple, however, in the design, production, installation, inspection process, such as failure to cause enough attention. In the electric hoist gantry crane in use process, if the defect of leg connections, such as fracture hidden danger of overturning bridge gantry crane occur. As a result, the examination link, pay attention to the electric hoist gantry crane leg installation quality inspection, is to ensure production safety, prevention of the accident is an important guarantee. Example: in 2010, the zhuhai YiMenShi inside some temporary steel structure workshop crane accident, at that time, the operators are preparing to lifting items, items in lifting has left the ground, the crane suddenly overall tilt to one side leg, fortunately, at that time the next workshop are not present in more than 20 workers, no casualties at the scene. Accident analysis accident lifting main parameter table 1 accident hoisting main parameter table type MH16-22 A5 rated lifting weight 16 t lifting speed 8 m/min lifting height of 6 m span 22 m working-level A5 cart speed 20 m/min.

2013年12月16日星期一

Imported equipment characteristics and use of electrical equipment maintenance

The characteristics of the imported equipment electrical devices and the basic situation of imported equipment in operation and maintenance characteristics and basic situation in operation and maintenance of electrical devices TengBaoYu (liaoning at liaoning 122009) are introduced in this paper introduced the main characteristics of complete sets of overhead gantry crane electrical devices, problems found during the use and maintenance experience. The article points out that the advanced technology and equipment must have the corresponding staff, management system and accessories to ensure corresponding, to give full play to the introduction of device of high efficiency, high quality. overhead gantry crane trade from our factory in the UK Deng Lupu international engineering co., LTD., has introduced the production of 150000 sets of full load of steel wire radial tire production line, early in 1989 through the national acceptance. Since putting into production, from five years of operation, equipment and pipe is analyzed.the achieves a higher level, the scale of production to meet the design basic ability. Actual use prove that these imported equipment is advanced, operation is reliable. 1 the characteristics of the imported equipment electrical devices 1.1 reliable these imported equipment more than a dozen companies from six countries, mixer, vulcanizing machine, inspection and testing equipment, a total of more than 50 Taiwan (sets), all products for the mid - 80 - s, technically mature, driving scheme is reasonable, and has been used in some countries, therefore, to run the reliability is high. The quality of electrical device is stable, reliable, electrical components comply with IEC standard.

Imported equipment characteristics and use of electrical equipment maintenance

2013年12月12日星期四

Wire rope electric hoist

Wire rope electric hoist by building height, such as rail type is divided into 14 types. Code types of HSG standard building height, linear rail, rigid bridge gantry crane table code class type of hand trolley type HSJ standard building height, type curve track, hand trolley type HLG hinged connection standard building height, linear rail, rigid connection of sprocket trolley type HLJ standard building height, the curve of orbit, hinged connection of sprocket car type HDG high overhead gantry crane building. Electric hoist can be used as a heavy equipment used alone, a small driving after also can be used for overhead monorail crane. Is a kind of compact structure, light weight, high efficiency and easy operations of lifting equipment. Specifications of wire rope electric hoist by building height, track type can be divided into 14 types. Choose type HLJ its appearance figure, symbol and type, the performance of electric hoist wire rope electric hoist code and type code type HSG standard building height, linear rail, rigid connection of hand trolley..

2013年12月11日星期三

The tension flange of crane beam

The tension flange of crane beam (or crane extension of tension chord) shall not be welded on the hanging equipment parts, and should not be on the spot at the lighter or welding jig. According to the provisions of the deceleration condition, bridge gantry crane properly selected base of the natural logarithm of multi rope friction wheel lifting equipment, the article conforms to the rated load of the pull wire rope with the friction between the friction wheel pad, raising and lowering design load in working braking coefficient; Force braking. Because in the process of lifting overhead gantry crane work not a - round Angle, degree; To appear empty container operation, in this condition, the rope dynamic antiskid safety factor; Such as emergency braking, according to hoisting rope sliding conditions not allowed by the raise the most unfavorable condition or than in accord with the rated load under the condition of raising and lowering a load side wire rope with light load side the cargo when the brake is more bad. Must, in accordance with big static tension ratio, therefore, the operating conditions for determining dynamic system of lifting equipment to work k - double container hollow container runtime allow dynamic boundary conditions. In addition, the balance weight single container to xu line, reduce the rope dynamic antiskid safety equipment, also according to the conditions on the difference of the counterbalance weight coefficient.

2013年12月9日星期一

tasks furthest apart are given priority as initial tasks

These initial tasks are assigned respectively to different (crane) task groups
as the first member of the group, then all other tasks are clustered according to proximity to them. Obviously, tasks furthest apart are given priority as initial
tasks. When multiple choices exist, overhead gantry crane running time can be reduced by selecting tasks with smaller feasible areas as initial tasks. The model provides
assistance in this respect by displaying graphical layout of tasks and a list of
the size of feasible area for each. After assigning an initial task to a group, the model searches for the closest remaining task by checking the size of overlapping area, then bridge gantry crane it into the task group to produce a new feasible
area corresponding to shape and size of feasible areas, illustrated in Fig. 9. In this case study, from the data and graphic output, the user may become aware that optimal locations led by test sets 1, 2, and 3(Fig. 3) are the best choices (balanced workload, conflict possibility, and efficient operation). Alternatively, in connection with site conditions such as availability of space for the crane position and ground conditions for the foundation,

2013年12月5日星期四

Crane (crane) operation normally just four driving and driven wheels

Crane (crane) operation normally just four driving and driven wheels, if the weight is very big, bridge gantry crane used to increase the wheel round ways to reduce pressure. When the wheels for more than four, must adopt balanced articulated frame device, make the crane load evenly distributed on each wheel. Bridge of the metal structure is composed of main girder and end beam, divided into the single main girder bridge and double beam bridge two kinds. Single main girder bridge by single girder and in the end on both sides of the span of beam, double girder frame is overhead gantry crane of two main girder and end beam. Main girder and end beam, rigid connection on both ends of the beam is equipped with wheels, to support bridge run on overhead. Main girder welding on the track, for lifting the car running. The structure of the bridge girder type is more than the typical box structure, four truss structure and vierendeel truss structure. Box structure and can be divided into the right box double beam, partial rail box double beam, partial rail box girder to wait for a few kinds. On track box double beam is widely used in a basic form, main girder by on either side of the upper and lower flange plate and the vertical web, rail car arrangement in the center of the line on the flange, its simple structure, easy fabrication, suitable for batch production, but gravity is bigger. Partial rail box double beam and rail box single girder cross section are ranged from upper and lower flange plate and the thickness of the deputy of web, rail car is decorated in the main web above, the casing short stiffening plate could save, in which partial rail box single main box girder is composed of a wide flange instead of two main girder, the weight is small, but made more complex. Four by four pieces of plane truss girder structure combination into a closed space structure, on the surface level on the truss generally covered by bedplate, weight light, stiffness big, but compared with other structures, appearance size, made more complex, the fatigue strength is low, have less production. Vierendeel truss structure similar to partial rail box girders, is composed of four pieces of steel structure of a closed, in addition to the main web for solid abdomen i-section girder, the other three piece of sheet metal in accordance with the design requirements of cutting into many window, form a vierendeel truss without diagonal, in the upper and lower levels of truss surface covered by bedplate, crane running mechanism and electrical equipment installed inside the bridge, weight is lighter, the overall stiffness is large, it is more widely used in China a type. General bridge crane mainly driven by electricity, generally is in the driver indoor manipulation, also has a remote control. Lifting weight of up to five hundred tons, the span of 60 meters. Simple beam bridge crane, also known as crane beam, its structure is similar to ordinary bridge crane, lifting weight, span and working speed are smaller. Bridge girder is composed of steel and plate steel beams or other simple beam, with chain or electric hoist with simple and easy as lifting trolley car, the car at the bottom flange of the h beam. Can bridge along the orbit, on a high shelf can also be along the suspension in elevated the orbit, below this kind of crane is called suspension girder crane. Special metallurgy bridge crane in the process of iron and steel production may take part in the process of the specific operation, the basic structure similar to ordinary bridge crane, but also on lifting the car is equipped with special working mechanism or device. The working characteristics of this kind of crane is used frequently, conditions, job level is higher.

2013年12月1日星期日

According to the bridge approach is divided into bearing type and suspension type two kinds

According to the bridge approach is divided into bearing type and suspension type two kinds. The former bridge along the car on the beam of crane orbit; The bridge along the hanging in the workshop crane orbit under the roof. Single girder overhead gantry crane crane, electric two break up. Manual single-beam bridge crane institutions working speed is low, the weight is small, but its quality is small, easy to organize production, low cost, suitable for no power after carrying amount is not big, requirements for speed eot craneproductivity is not high. Manual single-beam bridge crane using manual monorailey troll as a running car, with the hand chain hoist as lifting mechanism, the bridge is made up of main girder and end beam. Main girder with single beams, beam with steel or bending molding steel plate welded.

2013年11月29日星期五

Loader shovel dug and loading and unloading material is implemented through the movement of the working device

Loader shovel dug and loading and unloading material is implemented through the movement of the working device. By the typical working equipment of loader bucket, movable arm, connecting rod, rocker arm, and turned the bucket steel crane, movable arm oil cylinder,hoist gantry crane. The whole device is hinged on the frame. Bucket bucket cylinder through the connecting rod and rocker arm and articulated, for loading and unloading of materials. Movable arm with frame, movable arm cylinder hinged, used to hoist bucket.

2013年9月8日星期日

Manual single girder suspension crane what role?

With the market for its increasing emphasis on the development of the machinery industry, for machinery production operations are also getting support, in order to better reflect the effect of the operation of machinery and equipment, already on the market developed more products, each product is new machinery and equipment products are designed to be able to make a better mechanical equipment operating personnel to assist them so that their work can also reduce the burden, so that manual single girder suspension hoist crane  is better , then it is mainly what role?
1 speed
Today on manual single girder suspension crane operation speed of the process is relatively fast, on this point who used such products people are such a kind of feedback, indicating that the current manual single girder suspension overhead bridge crane  is better quality , and has an excellent performance, which is more satisfactory place, so in the course of its operation is often the faster, the faster the product is the more promising, so that it is are more useful.
2 Simple operation
Today in the market manual single girder suspension crane is a mechanical device more popular products, because when the operator when used in its feeling is very simple, because it is relatively simple to operate, there is nothing complex functions , not too professional, most people will use it.
This is the manual single girder suspension bridge gantry crane  in the market, the role played.

The method of choosing an electric crane hoisted What?

Select electric suspension gantry crane  is there are many, and is now in the process of using them often will notice the quality of electric overhead crane, and in ensuring quality problem is not a big problem under the premise can be use, and generally like the same kind of product is more useful, so now people are more like them, then when the electric machinery enterprises in the choice of crane hoisted what way to do it?
1.Brand
Typically, in the choice of machinery products in the process is the need to look at their product brand image, often a lot of plastic products, established brand image is not very good, so people in the choice of the time its not very satisfied with the choice, in fact the difficulty is relatively large, when the electric overhead crane products gradually increased, the customer is also a troublesome thing, in the course of its production brand is more critical, so when choosing an electric overhead bridge gantry crane  brand is more important.
(2) the role of
As this electric crane hoisted it on the market must have a significant role, and in the process used to carry out the role which can well be reflected, this role is the ability to be a good show out , so in the process of choosing an electric bridge crane  is important to note these.

For the use of electric overhead traveling crane pay attention to what?

Electric bridge gantry crane  hoisted on the market today is a relatively high-quality mechanical products, this product on the market is relatively good, because its use is more widespread, and people are more favorable impression of their, like this products on the market is more promising in the development process is often noticed electric crane hoisted a lot of problems, as long as is necessary to immediately find problems to solve, it is more appropriate way to handle it is now suspended for the electric the use of cranes need to pay attention to?
1 species
First, to carry out the production process is often more focus on product variety issues, because every business that requires the use of a variety of products is not the same, always have something different, be used in the course of its operation personnel for electric overhead gantry crane  species are more understanding and familiarity, so do not ask what they need to know the type of electric overhead crane, what size, etc., which are needed before a clear understanding of its use.
2 image
Is now on the market are required to be a better image of the product, the general image and enterprises are necessarily linked, in its long-term for the image of the process of development is often the most important, whether the product is also well, for businesses both mean need a certain image.
This is the use of electric overhead jib crane  when needed attention.

The market for the development of electric crane hoisted What?

Nowadays there are many products on the market is relatively good, because every product on the market developments are relatively hard, and more efforts to develop products on the market the more attractive, so its production the process of the electric overhead traveling hoist crane is more optimistic, and now on the market for electric overhead crane is more concerned about the development, and even some of the machinery is quite confident of its business, and I hope it is getting better and better development, so now on the market for its analysis of the development of electric crane hoisted What are the main?
1 Talent
Today, when the manufacturers in their production of electric overhead crane when the most important thing is to rely on the power of talent condensed because of the strength of cohesion is relatively large, a development of enterprises in the process of talent is the most need to have the If no talent then the company or the manufacturer of the product is difficult to produce, which explains professionals or the use of an electric hoist gantry crane , but in the selection process of the professionals is the need cautious.
(2) Equipment
When the electric overhead traveling crane manufacturers in the process of its production equipment is often more crucial thing, because electric crane hoisted on the market is a kind of relatively easy to use products, so for the time of its production equipment is relatively there is a demand.
This is the market for the development of electric eot crane hoisted the approximate analysis done.

Select electric single-girder cranes which elements

There are many products in the course of its production is more important, because there are a lot of products in its production when it is paying more attention to quality issues, and in the course of its production is more able to be used , and under normal circumstances in the selection process of electric single girder overhead gantry crane  is relatively a lot of problems need to pay attention, because the choice for mechanical products is relatively little need to be careful, now select electric single-girder crane when there are elements which it?
1.Model
Now, with the enterprises for the electric single-girder crane growing demand, the choice of electric single-girder crane in the process have noted the problem is more and more, in general, when the choice is more important model, different varieties reflected the product model is different, a comparison of product variety is the more upscale models with the more difficult, but not to say that with less, and now electric single-girder bridge gantry crane  models have been more and more, this is their choice for businesses addition of the probability of a lot.
2 Specifications
In its selection process specifications for the product is more important to note, the product specification is more important, especially in the selection process of the product machine is more need to be careful, careful consideration in choosing an electric single girder crane in the process is more important.
This is in the choice of electric single-girder overhead bridge crane  several elements that need attention.

Electric double beam crane how developed?

Now on the market role of the electric double girder Steel crane  is relatively large, it uses a dual beam material, generally single beam, so it is a little bit special products for this product is relatively in need because such products on the market is relatively rare, so use them when are generally more careful, because extend the life of the other, which is quite good, and now electric double girder crane is mainly how developed it?
1 Product Updates
When the electric double girder crane in the process of development is the need to constantly update their products, and only in its case constantly updated in order to better display quality products in its production process often products is relatively high, and now he's more concerned about the development of the market, but also have a lot of machinery is relatively optimistic about its business in the development process of their continued support and help, and product updates only a part.
(2) quality assurance
Now, with the electric double girder bridge crane  continues to develop, in terms of quality has Nana fill a good guarantee, as long as there are points to ensure users will use them more confidence, which is the product during development process a little more attention, but in terms of quality is more valued.
This is the electric double girder hoist gantry crane  on the market gradually developed factor.

2013年9月6日星期五

Forging crane

Forging hoist gantry crane  generally have two cars, a car-based platform, designed for hanging in the forging process billets and slabs hanging flip the turn plate (Flipper) use. Another deputy trolley sleeve ingot is used to support the weight. Sets ingot is forged in order to grip and balance during ingot (or forging) weight tool. According to process requirements, two car on the track in their respective work.

Traveling mechanism set up on the main bridge. Depending on the wheel of the weight, with 6-24, or more. In order to facilitate the driver and hammer (hydraulic) with the operator, usually hanging in the cab allows the driver head-forging position, and a damping device. In order to prevent radiant heat forging effect on drivers, using thermal insulation operating room, and in the indoor air-cooler.

This overhead gantry crane  main and auxiliary car roughly the same speed, so that the main and auxiliary car when coordinated to work together. Main small car is equipped with cable reel, cable conductor to manipulate through hanging on a hook on the turn steel machine. There is no hook to prevent the hook in the forging process freely rotating fixtures. In order to reduce the impact load forging the impact of the relevant institutions in turning steel machine parts hanging a spring buffer device.

Forging bridge gantry crane  from the weight, there are currently 20/5, 80/30, 125/30, 200/80 t and so are several.

Trolley drive mechanism type

Self-propelled trolley run institutions, each with a small car with four wheels, half based on.Steel crane Its rotation types are divided into two categories, namely with open gears and gear are all closed.

Start gear

Open running gear mechanism enclosed in high-level phase shell inside, oil bath lubrication; using low-grade open gear. Made ring style open gear and the wheel together with the wheel center around a fixed axis. This drive type, can meet the requirements of heavy working conditions, with sufficient reliability, the disadvantage is inconvenient handling wheels overhaul.

Open gear drives the biggest drawback is badly worn, so general-purpose trolley overhead bridge crane operating agencies, mostly with closed gear type.

Enclosed gear drives

Arranged between the two intermediate gear wheels, the drive shaft of the torque by the smaller axis of each side of the shaft torque of the torque gear half. Reducer output shaft to the wheel between the use of semi-floating shaft gear couplings and coupling (two floating shaft can grow, you can also unequal length), or a full-tooth couplings and a floating shaft coupling. The advantage of this type is to allow the installation of large deviations, easy installation, good handling grouping. From the weight of more than 10 tons of overhead hoist crane are using this type of car. This type of drawback is due to the large wheel bearings and couplings, operating mechanism becomes complicated and bulky, resulting in higher costs.

Crane safety working conditions

To ensure the safety of the crane work, bridge crane design should meet the following three basic requirements:

First, the metal structure and mechanical parts should have sufficient strength, stiffness and flexural capability.

First asked Crane parts and metal structures under load does not destroy, that is to meet the strength requirements. Static strength calculation is the most basic calculations. Stresses the importance of general circulation or fewer parts, only for static strength calculation. Parts or components subjected to cyclic stresses, in addition to fatigue calculation, but also should be the peak load for static strength calculation. For complex stress state and other parts of wire rope, in order to simplify the calculation, usually only by major load, mainly deformed shape, a higher safety factor for static strength calculation.

But alone is not always guaranteed to work damage, such as by an excessive load deformation member will also affect the normal operation. Therefore, you must also request loads, components produced by deformation should be within the allowable range, that with proper rigidity.

Slender rod suddenly bent or pressed steel structures localized buckling in statically determinate structures may result in variable geometry structure. Its original equilibrium state becomes unstable equilibrium, so that the failure of structural parts and components, it will also result in the destruction of the hoist gantry crane , thus satisfying the requirement to meet the stability is also very important.

Second, the machine must have the necessary stability against overturning.

Third, the former winter has to meet the requirements of the job performance power brakes provide the necessary braking torque.

Determine the characteristics of the crane's work load randomness, while the bridge gantry crane is used in deterministic approach, so for complex changes in actual load, only with simple theoretical calculations and experiments and experiences combined calculation to determine by knowledge thus obtained approximate actual load, often called load calculation.

What materials commonly used cranes

What materials commonly used cranes? bridge gantry crane structural parts, metal structures, fittings and accessories are made of metal and non-metallic materials processing.Crane parts generally forgings, rolled parts, welding parts, castings as blanks, after mechanical processing. Forgings, rolled parts, welding parts mainly carbon structural steel, quality carbon structural steel and low-alloy structural steels. Important parts are made of steel, steel structure together with the special requirements of special premiums steel parts. Castings can cast steel, cast iron and bronze. In order to improve the mechanical properties, single girder bridge cranes improved load carrying capacity and life of parts, the casting must be heat treated. Nonferrous metals and alloys are used with high electrical conductivity, wear resistance, corrosion resistance, or other special properties of high strength requirements of the parts

Crane hook material

Crane hook material requires a high strength, toughness and ductility, there is no danger of sudden rupture. Single high strength material and defects usually very sensitive to cracks and higher strength, the greater the likelihood of sudden rupture. Therefore, it is widely used gantry crane hook material low carbon steel and low carbon steel to manufacture.

According to GB10051-88 "lifting hooks" requirement, forging hook material should be used DG20, DG20Mn, DG34CrMo, DG34CrNiMo, DG34CR2Ni2Mo steel manufacturing and other models, especially DG34CrMo, DG34CrNiMo, DG34CR2Ni2Mo alloy steel, because it contains certain content Cr, Ni , Mo element, can inhibit the austenite grain growth, making it a strong increase;bridge gantry crane during tempering, but also has three elements due to intensity decreased much, but elongation and impact toughness has enhanced many, Given containing Cr, Ni, Mo alloy elements have high strength, toughness and good, use it to create a relatively small hook size, carrying capacity is high.

In order to ensure that the manufacturing out of the hook does not occur in the life of a hard change, aging embrittlement, must ensure that the content of aluminum in the steel, to International Organization for Standardization ISO standard 0.02%.

Chip hook is generally used for large tonnage or a hot place by strong, he is usually with a thickness not less than 20mm of A3, 20 or 16Mn steel plate. Chip hook generally not a sudden rupture and damage because of breakage caused by defects confined to individual plates,hoist gantry crane and the remaining plate can still support the lifting of individual damaged plate can be replaced, and thus greater than the safety hook forging sex.

Detailed explanation of test tower cranes bolted preload and methods !

Stress analysis of the Steel crane  bolted , drawn preload installed in the tower 's importance to derive preload application methods . This article focuses on the tower crane bolt connection. Keywords: tower crane bolt preload application .

( A ) by the bolt preload and the relationship between force

If fully tighten the nut , then the nut in the axial direction of the bolt forward h, is bound by the bolt preload leaving the board under pressure , assuming that the bolts between the plates cut along with the P stands for preload , T represents cubicle the extrusion pressure , obtained by the equilibrium condition P = T, and the extrusion pressure is equal to the preload , when the elongation of the bolt shaft Δl1, deformation of the pressing plate , terms of E1 and A1 represents the elastic rod bolt modulus and cross-sectional area , E2 and A2 represents plate modulus and cross-sectional area , according to Hooke's law , as P = T.

N role when the external force , because the force is not directly applied to the bolts , but added to the board are connected , thus tends to be even parts separate , deformation decreases, reducing the pressing force between the plates , the by the extrusion pressure is reduced to this case by the equilibrium conditions between the plates when the increase to the original compression completely disappeared, the pressing force between the plates disappeared , with a balanced preload disappeared. But it does not mean that the bolt is not exposed to tension, on the contrary , when the deformation between the plates is completely disappeared , corresponding to an elongated bolt , the bolt force increment elongated , by the force equilibrium conditions at this time . From the above analysis , tensile bolt connection must preload , the connected parts being squeezed, when subjected to external forces , connections between the extrusion pressure decreases with force , preload also decreases. When the external force so that the two connections increased to just separated from the preload is reduced to zero , will be greater than the tension bolt suffered original static preload applied when connecting .

( Two ) the characteristics of high strength bolts

The shaft bolt 45 heat-treated steel or alloy steel, its performance rating of 8.8 , 10.9 or higher. Nuts and washers for the corresponding performance level made of steel , the installation requires very tight bolts , made great preload, the component contact surfaces pressed . Friction -type high strength bolts completely rely on the friction between the contact surface to transfer shear , and slippage as the carrying capacity limit state . Pressure type high strength bolts to connect the failure of bearing capacity limit state , and slippage limit the normal operating state . Preload applied generally bolt material yield limit of the net cross-sectional area multiplied 0.7 times , the choice should be less than the maximum working tension preload to the contact surface between the member is still residual preload, to ensure the normal work reliability.

( Three ) standard section of tower crane tower casing bolts

Standard tower sections for the main force component , working under axial force , bending moment and torque. Connection between standard section , I plant a tube connecting bolts , tower main limb composed by a single angle , the main casing head and extremities flat upper and lower ends connected to the friction between the plane can withstand the torque caused by the work shear , therefore , can be regarded as the connecting bolt friction type , but with the bolt connection , so the preload is one not to be neglected . We found that a considerable number of tower crane standard section in connection with the bolt preload specified values are not reached , when working with the tower overhead gantry crane  , tower main limb repeated tension and compression alternating , nuts relaxation, the main limb the gap between the end faces increases, the boom and the tower at the junction of horizontal displacement increases, causing the tower widening secondary stress , so that security reduced, and some even lead to an accident down the tower , so the pre- clamping force implementation methods and numerical control is an important part of the tower crane installation .

( Four ) tower crane slewing ring bolts

According to the work force characteristics , slewing ring friction-type high strength bolt should belong , slewing ring and the upper and lower bearing seat connection work is generally done on the ground , tighten the bolts , the available torque angle method or the method of symmetrical uniform in the circumferential direction several times tighten to achieve the required preload.

According to Hooke's law for more than bolted stress analysis , export preload on the tower crane on the application method , in the absence of a torque wrench in the case , the use of angle method can effectively achieve and guarantees required when installing preload value. Stress analysis for bolted connections , draw preload installed in the tower 's importance to derive preload application methods . This article focuses on the tower jib crane  bolt connection. Keywords: tower crane bolt preload application .

2013年8月30日星期五

Lifting Mo as "Sky Crawlers"

in the city to carry out a comprehensive building site "Hundred Days Campaign" when BMCC construction quality supervision station on Monday and start another one easily overlooked "Air killer" - building site construction crane hanging machinery monitoring and inspectors.hoist gantry crane So far, the city's more than 30 equipment rental, installation companies and lifting all construction facilities from now until the end of January next year, will be monitored as a key object of special inspectors.
According to reports, the recent construction site supervision and inspection of lifting equipment was found in breaches:hoist crane Partial demolition companies in the "Hefei Construction tower crane safety management manual" (people and goods elevators) installation acceptance, maintenance, fill in the non-standard data fill ambiguous; special equipment operating certificate, some companies still hold false workers induction phenomenon ...... in response,jib crane the station will be in the future supervision and inspection to increase penalties for operating workers doesn document type requirements for demolition phenomenon, suggested issuing agency revoked qualification certificate.

How to extend the life of lifting equipment?

(A) to complete the task well: To achieve efficient, high quality, low cost;
(2) good technical condition: overhead gantry crane To do mechanical devices are often in good condition, to achieve the specified performance requirements, random tools components and accessory devices such as a complete range;
(3) Use good: To earnestly implement the responsibility system based on position of the system, bridge gantry craneso that rational use of original records should be complete and accurate;
(4) maintenance of good: To conscientiously implement the maintenance of order, so meticulously maintained, ready to do a good job cleaning, lubrication, adjustment, tighten, corrosion;
(5) Safety is good: to conscientiously comply with the relevant safety procedures and safety systems, to achieve safety, no mechanical accidents.
As long as arouse people's enthusiasm, establish reasonable rules and regulations, strict implementation of technical requirements, will be able to improve eot crane intact rate of utilization and efficiency

Through vibration and sound to diagnose faults crane

Mechanical malfunction diagnosis instrument (precision diagnostic techniques) in China has been widely studied and used, and achieved some success, but not very common, especially in lifting machinery fault diagnosis applications not more. Fault diagnosis technology popularization and application will take some time. At the same time the instrument has been used to grasp the diagnostic techniques used for mechanical equipment condition, are preventive measures, and the need for a set of fairly complex diagnostic or detection system, which itself has some limitations. The job site in the bridge gantry crane senses the fault diagnosis, refers to the human sensory organ functions through practical work experience with a combination of judgment method, some of the crane fault diagnosis, often unique.

Cranes abnormal vibration and noise are the most common fault performance, failure of the crane high percentage.overhead bridge crane Such failures caused by many reasons, but generally by the mechanical stress effects or electromagnetic stress generated. As long as some of the common faults based on vibration and sound technology and other related disciplines basics, using vibration generation, transmission and acoustic propagation and radiation principle, the use of the crane body senses vibration and sound analysis of the causes of failure, after several practice, you can quickly reach the standard troubleshooting purposes, namely to quickly find the point of failure, making the crane fault repair work more efficiently. I believe in promoting the application of sophisticated diagnostic instrumentation technology, accompanied by human senses diagnostic methods,Steel crane you can receive crane troubleshooting special effects.

How to lubricate cranes

To lubricate the crane main role is to control friction and reduce wear and reduces temperature to prevent rusting parts,overhead gantry crane forming seals. These effects interdependent and mutually influence. If not effectively controlled friction, can not achieve the purpose of reducing wear, will generate a lot of frictional heat, which leads to high mechanical, thereby undermining the friction surface lubrication and lubricating material.

Where there shaft hole with the location and relative motion of the mechanical parts of the friction surface lubrication should be carried out on a regular basis. All such forms of cranes.hoist gantry crane As a result of the different conditions, the requirements of the lubrication points are the same. For all types of cranes and different parts of the lubrication points are required in accordance with the instructions of the periodic maintenance and periodic inspections carried out and the use of qualified its lubricating grease to the normal operation of the machine, to overcome premature wear. Such as the use of substandard substitutes, will cause the machinery accidents, damage to equipment parts directly affect the safety in production. overhead gantry crane It is not difficult to see, lubrication in the care and maintenance of lifting equipment plays a very important role, and lubricating materials selection and use, but also directly affect the lubricating effect.

Crane wire rope maintenance

Crane wire rope safe life largely depends on the quality of maintenance,hoist crane so the correct use and maintenance of wire rope is an important task. General should:

1, the rope is packaged into a disk factory, open the original volume wire rope, according to the correct method, shall not cause distortions or kinks.
2, wire cutting, there should be measures to prevent the spread strand.
3, installation wire rope should not drag in unclean places, nor should it around in its object, should prevent stroke, grinding, crushing and excessive bending.
4, the rope should be kept well lubricated condition. Lubrication at least twice a month.overhead bridge crane First with a wire brush to the rope on the dirt and cleaned with kerosene, then heated to above 80 ℃ oil immersion rope, cord dipped in the lubricant. Lubrication should pay special attention not easy to see and difficult to access areas, such as balancing on a rope.
5, the daily use of the rope should be checked every day, including the end portion of fixed connection, the pulley at the balance check and security make judgments.
6, to receive wire rope, wire rope must check the certificate, in order to ensure the mechanical properties,Steel crane with the original design specifications consistent with the provisions of the rope.
7, the rope should prevent damage, corrosion, or other physical reasons, chemical causes of performance degradation.

General safety check hoist drum

Rope hoist drum by pressing action, but also by causing the bending and torsion wire effect,bridge gantry crane and plays a major role in extrusion. Cracks have occurred since the roll, the roll indentation rope accident, so check out the drum have cracks should be scrapped, the spool shaft by bending and shear stresses, should be discarded if cracks are found, otherwise there accidents can happen off-axis; reel rope groove wear depth should not exceed 2mm, when more than can be re-grooving, but roll wall thickness of not less than 80% of the original; wheel up and down without cracks, screw on connections to tighten.

Wire rope on the drum groove wandering off overhaul, when the wire rope groove angle is relatively large, the rope will wear groove edges or even quit, causing severe rope wear. For relatively rope wire rope groove drum grooves to allow deflection of 4 ~ 5 °, when more than 6 °,hoist gantry crane the rope may quit, the general common cause is a hook pulley from the roll distance is too small, then do the appropriate adjustments. May be due to the drum pulley hook skew safe position, may have inclined deflection caused by the goods leaving the rope hanging quit.

In addition, new for wire rope, if twisted rope wrapped around the roll stiffness (due to roll on the wooden prehensile) did not relax, but also make rope quit, and even crossing a rope pulley correct together, in order to prevent the accident, you can put suspended by rope into a disk gradually liberalized straightened,bridge crane twisting stiffness can be completely gone.

Crane Operation Safety Regulations

One, bridge gantry crane driver and signalman shall have a unified signal. Operators should be dedicated ladder, operating room, closing should be preceded by the controller to zero. Operating room should be wood or rubber insulating mat board.
Second, the gantry crane work, should make the following preparations:
1, check the steel parts are securely connected.
2, check the volume of the rotating part of the field of machine lubrication is good, brakes are sensitive and reliable.
3, check the wiring is correct electrical equipment, insulation is good.
4, Check and test the limit switch is sensitive, good lighting equipment is complete.
5, check the scaffold boards, railings, escalators is in compliance with safety requirements.eot crane Rail clamp (or anchor screws) are tightened.
6, after two tripod legs pin and card board is moving.
7, room and operating room fire-fighting equipment are complete and valid.
Third, the driver must be located in the operating room good view position.
Fourth, the crane hoist, luffing, slewing used winches, winch must meet safety requirements, running the motor with the motor must comply with the relevant safety regulations, overhead gantry crane wire rope used must meet the relevant safety requirements.
Fifth, check before driving on track to be within the scope of the ground and run unattended or obstacles, and-ringing hands. Traveling carts must have someone pull the cable, the cable car back and forth to be insulated well hung, sliding freely. When lifting, should be carried empty running, then try hanging from the ground 100-150mm, heavy bondage found incorrect, should be re-tied.

Construction Machinery engine of growth remains strong, the acceleration of urbanization positive industry outlook

Sales booming with construction machinery enterprises operating situation in stark contrast to the trend of the stock of construction machinery sector remains in the doldrums this year.hoist gantry crane A researcher believes that as the scale of investment in fixed assets and a strong positive correlation between cyclical industry, taking into account the scale of investment and real estate control policies sharply increasing the degree of market doubts about the prospects of construction machinery.
In the Golden State Securities researcher Dong Yaguang opinion, the process of urbanization and growth space determines the advancing speed of engineering machinery industry development prospects. Over the past nine years, China's urbanization rate increased by nearly 10 percentage points, the current urbanization rate is less than 50%. Therefore, to achieve in 2020 nearly 60% of the target, there is a lot of infrastructure needs, improve. For data to estimate the urbanization rate increased by one percentage point each, will add 6.6 trillion in investment demand.bridge gantry crane The accelerated process of urbanization construction machinery industry will provide long-term stable development momentum.
GF Securities researcher Qiu Shiliang believe that China's construction machinery industry is growing late, industry, the economy in the short term may be peaking. He predicted that after three years,gantry crane China's construction machinery pattern will initially laid, then the industry will enter a period of slow growth.

Industrial weighing technology for special applications on lifting machinery

In recent years, some foreign experts pointed out that modern industrial material handling engineering technology is the weakest , the most urgent need to address one of the areas ,jib crane but it is also the most potential , the most promising areas of proposed materials handling technology is the third profit source concept. Material handling machinery usually includes lifting machinery , transport machinery, handling machinery , warehousing machinery, industrial handling vehicles and hydraulic machinery of 6 categories of products. In my country, material handling machinery commonly called lifting and transport machinery. Since lifting has many varieties , strong function , the role of other characteristics, in material handling machinery in a dominant position , is the first application of weighing technology material handling machinery.
A weighing technology in the history of overhead gantry crane application
Lifting is a kind of intermittent operation mode of the material for lifting , moving down and horizontal handling equipment . In order to make the crane during the completion of the job at the same time to be hanging materials weighing , people consequent lifting machinery fitted in the ideas and aspirations of the weighing device .
Lifting applications weighing technology history over 200 years. In Munich Bavaria BIPM , the preservation of a 1780 weighing about loads wall hanging spring balance ; there is a station in Hamburg in 1760 fixed jib jib crane , which is equipped with a 1858 top decimal scale manufacturing . In the first half of the 19th century , cranes ( crane ) scales on the " Swedish ship scale" is famous for the name . In 1932, a crane with a sling scale errors have been able to reach either a load of less than 0.2% , resulting in a type approval .
From 1986 onwards weight limiter first advent of the end of 2006 to create about 200 million yuan of sales value , and even national standards legislation have proved the fact that not only the starting weight limiter manufacturer has brought huge economic benefits also produced an extensive and far-reaching social benefits.
Currently, a new generation of large-scale and efficient crane electrical control device has been developed for all-electronic digital control system ,Steel crane in particular the application of modern industrial weighing technology has become involved in material handling lifting decisive parameters obtained during an important measurement part , is effective in creating the basis for the third profit source and protection.

2013年8月29日星期四

"Large crane install security monitoring and management system implementation plan" ( 2 )

Fourth, the main work steps and content

( A ) organizing the investigation , find out the base . First half of 2011 by the State Administration of Quality Supervision Organization in the provincial quality supervision department of a large bridge gantry crane  with a survey has been conducted to find out the number with a large crane , security monitoring devices or systems , as well as large-scale lifting machinery manufacturing and so on.

( Two ) to carry out preliminary pilot , explore the experience . To the end of the first half of 2011 , select some key sectors ( areas ) of some key equipment to carry out preliminary pilot , demonstration and standards for the trial to provide basic data and experience.

1 . Preliminary scope of the pilot : first in railway construction , road construction , power station construction, and shipbuilding industries using more than 200 tons and erecting machine ,eot crane 200 tons and above universal gantry cranes, 320 tons and above, shipbuilding gantry cranes, 60 tons and above ports , shipyards , power plants and portal cranes , 2000 t m and above normal , power tower cranes, crawler cranes 450 tons and above , fixed , swing -style, pan , Radiant cranes of thirteen varieties pilot.

2 . Pilot Contents: quality supervision department in conjunction with the safety supervision department and other relevant departments on the production and use of the identified units of each selection 1-2 sets new manufacturing and 1-2 sets in with a large crane , installed on one machine safety monitoring and management system , By monitoring , control, management and other means , to achieve safe operation control , dangerous critical alarm , on-site real-time display and data record keeping and other functions, while the use of video and audio technology to achieve real-time display and recording status , after the playback effect. On this basis , in conditional units work according to the specific circumstances and needs , and further remote transmission, remote monitoring, remote management, remote services, data , video and audio queries, data, video and audio statistics and analysis functions gradually build things based technologies crane safety monitoring and management of local and remote monitoring platform monitoring platform [WY1].

( Three ) the development of standards , test verification . First half of 2011 to the end of the relevant standard committee coordinating organization for scientific research, design , manufacture, use , inspection , and other units to develop and report security monitoring and management system with national standards. Meanwhile, the combination of pre- trial , organizations related to type testing agencies already " hoist gantry crane  safety monitoring and management system " to carry out experimental verification.

( Four ) consolidate our achievements , to expand the pilot . 2012-2013 , summed preliminary experimental work, expand the scope .

1.2012 , the pair of large lifting machinery, production and use of all units in the unit at least one corresponding to each species of large crane install security monitoring and management system , consolidate and promote the early experimental results.

2.2013 years , and gradually in all newly manufactured large lifting machinery installed all security monitoring and management system .

( Five ) full forward, to achieve tangible results . 2014 to 2015 , and intensified efforts , the full implementation of this work to achieve standardization, normalization .

1 . Starting in 2014 , all in a large crane with a full installation on security monitoring and management system .

2.2015 at the end , have not installed security monitoring and management system of large lifting machinery, will not be used.

Fifth, work requirements

( A ) to strengthen their leadership and responsibility . Local quality supervision , safety supervision and relevant departments should strengthen leadership , and assign responsibilities . Local quality supervision departments to combine the actual situation, formulate practical program of work to strengthen coordination and cooperation with relevant departments , while strengthening the help of pilot enterprises , supervision and guidance of research to develop the necessary incentive and restraint measures , a strong impetus to this term work.

( Two ) focused and strengthened. Local quality supervision , safety supervision and relevant departments to guide and supervise the production and use units to develop security monitoring and management system procedures, enhance operator training, improve skills , standardized field use management, and improving the level of protection and security infrastructure 's ability to prevent accidents , in accordance with the requirements of stage work , timely completion of large lifting machinery installed security monitoring and management system tasks.

( Three ) to strengthen the linkage , and strengthen supervision . Local quality supervision , safety supervision departments should unite and collaborate closely with , and vigorously promote the orderly conduct of this work . To actively seek relevant policies to encourage the production and use of units to strengthen the monitoring of daily supervision , to take inspection, sampling inspection, mutual inspection , etc., on a large hoist crane  mounted security monitoring and management system were carried out step by step inspection, identify problems and timely coordination solution . To work around promptly reported to the State Administration of Quality Supervision and the State Administration of Work Safety . AQSIQ and the State Administration of Work Safety will be based on the progress of work with the relevant departments to conduct supervision and inspection.

( Four ) wide publicity to create atmosphere . Local quality supervision , safety supervision departments should strengthen the publicity work in various forms , improve production , and use of , and management , engineering and technical personnel and knowledge of the workers , and fully mobilize their enthusiasm ; want to play to industry associations, societies, research institutes , inspection agencies in technology promotion and other aspects of the service , and improve the quality of work and level ; in the implementation process , pay attention to summing up the work , promotion of advanced models , demonstration and guidance , to promote the work for the orderly conduct of good work to form a good atmosphere.

"Large crane install security monitoring and management system implementation plan" ( 1 )

To implement the " State Council on Further Strengthening the safe production work notice" ( Guo Fa [2010] No. 23 ,bridge gantry crane hereinafter referred to as "Notice" ) required to promote the installation of large crane safety monitoring and management system work to improve the nature of large lifting machinery safety , prevention and reduction of heavy lifting machinery accidents, and the formulation of the work program.

First, the guiding ideology

Adhere to the " people-oriented, safe development " principle and the " safety first, prevention first, comprehensive management " approach, the application of modern information management technology things to produce unit and used as the main body , to improve the performance of large lifting machinery intrinsically safe to promote the upgrading of products to prevent accidents and protect the lives and safety of employees and the public .

Second, the overall objective

In the " Twelve Five " period, to road construction , railway construction, power plant construction , shipbuilding and other industries ( areas ) as the focus , and gradually in the new manufacturing and installing with a large crane safety monitoring and management system ,overhead bridge crane strengthen the large lifting mechanical technology security management and control , and promote standardization and regulation field operations , to achieve large-scale lifting fundamental improvement in the security situation .

Third, the working mechanism

( A ) play an enterprise initiative. This work with large lifting machinery used as the main units and production units , first select the pilot conditional units , give full play to the role of the pilot units and enthusiasm , on this basis, and then gradually expand the pilot and promotion.

( Two ) the establishment of departments linkage mechanism. To effectively promote this work, the establishment of "a large crane mounted security monitoring and management system working group" to take charge of the AQSIQ , the State Administration of Work Safety comprehensive coordination , the Ministry of Railways , Ministry of Transport , Industry and Information Technology Ministry of SERC , the SASAC and other related industry authorities involved in the implementation , guidance, supervision, implementation of local and large-scale production and use of units mounted crane safety monitoring and management system the main responsibility for the safety and protection measures to ensure the safety monitoring of large overhead gantry crane installation management systems work smoothly and effectively implemented. The Working Group meets regularly to coordinate research and discuss solutions to promote the work of the relevant issues , and based on operational need to hire an expert panel set up to help make the relevant technical support and so on .

( Three ) full play to the social sectors . The relevant standard committee , research institutions, associations, societies, such as the inspection agency technical support and advocacy platform, a strong cooperation and support of this work effectively .

Special Equipment Safety Act through January 1, 2014 shall come into force

Recently, the second session of the third meeting of the NPC Standing Committee voted through the "Special Equipment Safety Law",Steel crane since January 1, 2014 into effect.
Special equipment including boilers, pressure vessels, pressure piping, elevators, cranes, passenger ropeway, large-scale amusement facilities, field (factory) special motor vehicles. These devices generally have a high-pressure, high-temperature, high-altitude, high-speed operation under the conditions characteristic, flammable, explosive, prone to falls from a height, etc., to have greater personal and property safety hazard.
Special Equipment Safety Act seven chapters 101,hoist gantry crane special equipment for the production, operation, use, inspection, testing, safety supervision and management, emergency rescue and investigation, legal liability, respectively, detailed provisions.
Special Equipment Safety Act highlights the special equipment production, management, and use of safety responsibility, clearly states: In production, the production company responsible for the quality of special equipment; in the business sectors, sales and rental of special equipment must meet the safety requirements, use of special equipment lessor bears safety management and maintenance obligations; use in accident-prone areas, and use of safe and responsible use of special equipment,overhead gantry crane special equipment and the responsibility for retirement obligations, the incident shall be liable for compensation for damage caused by responsibilities.

International heavy machinery industry overall development

Heavy machinery industry for the national economy and national defense construction to provide all kinds of technical equipment manufacturing,hoist crane with industries associated with high drive capability and high-tech features, is a national and regional level of industrialization and economic comprehensive strength of science and technology signs, but also between state and national long-term interests of the fundamental and strategic industries.
As advanced science and technology to transform traditional industries with an important carrier of the heavy machinery industry and high-tech industries and the development of information industry base and national economic security and military security is an important guarantee. Mature industrialized countries in the world today 40-80 years, respectively, in the 20th century established their complete heavy machinery manufacturing industrial system.
Today, these countries gradually achieve the transition to the heavy machinery industry as the carrier,overhead bridge crane to a service-focused direction of post-industrial transformation and the knowledge economy, efforts to promote industrial integration, development of core technologies to large enterprises rely on core technologies and capital as a means of worldwide allocation of production resources, strengthen production control, optimize product costs, in order to consolidate and improve the heavy machinery manufacturing competitiveness.
After decades of transition, the developed countries have focused on the heavy machinery industry, the vast majority of core technology, thereby maintaining a world leader. From a global perspective, the high concentration of heavy machinery industry,jib crane competitive enterprises occupy a larger market share.

China Heavy Machinery Industry overall development

China's heavy machinery industry,bridge crane with the founding of New China gradually developed since the founding of the heavy machinery industry has achieved a number of major technical equipment in China. Heavy machinery industry is not only highly valued by the state, has become China's mining, energy development, raw materials and other basic industries, and large casting and forging strong localization of major equipment pillar. At present, large-scale heavy machinery enterprises have the ability to provide an annual output of 2,000 tons of mine, an annual output of 60-70 tons of metal ore, annual output of 500 tons of underground coal mine, process 300 tons of coal preparation plant, a single series annual processing capacity of 300 tons of plant and other necessary equipment, and annual output of 600 tons of iron and steel enterprises with conventional process equipment. According to China Heavy Machinery Industry Association, the division of the heavy machinery industry is divided into sub-sectors of metallurgical and mining machinery and material handling equipment sub-sectors.hoist gantry crane The company belongs to the heavy machinery industry in the metallurgical and mining machinery sub-sectors.
2003-2009, in the mining, metallurgical and other downstream industries continued growth in fixed asset investment driven, metallurgical and mining machinery sub-sector achieved sales revenue compound annual growth rate of 38%, higher than the material handling machinery sub-sector average growth rate of 28%, driving heavy machinery industry grew 32%. 2010, China's heavy machinery industry, the situation is generally good, the industrial output value increased by 25%, industrial sales output value increased by 24.4%.
2011 January to November, the heavy machinery industry overall industrial output grew 26.34%, industrial sales output value increased by 27.22% "Twelve Five" period, the heavy machinery industry trends based on relevant national long-term development plan as a guide, aiming at the international advanced heavy industries, using information technology to promote industrialization, the transformation of traditional industries, to adjust the industrial structure and technological enterprise organizational structure, promote industrial restructuring and technological upgrading; focusing on key construction projects, enhance the comprehensive technical capabilities; strengthen independent innovation, accelerate the formation of independent technology,bridge gantry crane independent standards and independent brands; cultivate the development of strategic emerging industries, promote the formation of new competitive advantages and new economic growth point, to improve the overall level of equipment manufacturing industry.

2013年8月28日星期三

Lifting machinery industry in 2015 is expected to pick up a full recovery

Lifting machinery industry in China has experienced nearly a decade "blowout" type of development, the whole industry has entered a production contract, revenue fell cycles. China bridge gantry crane  CEO, industry analyst Yangshu Yan said: "In fact, starting in 2010, the industry has begun crane shot down, and gradually into a low-profit era, to the winter of 2012, the industry has come."
2013 lifting machinery industry growth slowed further, many crane companies in the homogenization of serious competitive environment difficult. Lifting industry in China has a "barometer" of the Chinese crane hometown in Henan Province Changyuan, past busy, machines roaring situation no longer exists, lack of factory orders, production team layoffs have become a common phenomenon industry . Funding strand breaks is very difficult for many companies in the brink of life and death. 2013 a quarter of the entire industry output profits fell nearly 60%.
Yang Shuyan analysis that led to the first quarter of 2013, corporate sales and revenue both fell mainly due to weak industry demand, but in the back of weak demand, not just domestic fixed asset investment growth and a decline in the real estate market five new national policy impact, but also the entire country in 2012 a continuation of the equipment manufacturing industry downturn.
hoist gantry crane industry over the last golden years, gave birth to the rise of a number of leading enterprises, but the excessive pursuit of speed and scale also resulted in overcapacity, irrational structure, product homogeneity, etc. invisible injury, this situation is growing stagnant 2012 annual performance is very obvious to the industry caused a lot of pressure. Enter 2013 in the enterprise revenue decline, the market demand slowdown Yan Chun situation, Changyuan also from the government level, the use of the visible hand pushing business strategic restructuring, guide enterprises to adjust product structure, promote the healthy development of the whole industry a reasonable .
In fact, some industry experts are not optimistic about the crane industry placanticline internal reorganization, because different companies kneaded together, sheer scale merger may not be able to achieve optimal results. Large enterprises and groups requires companies endogenous development and growth, rather than a simple merger and reorganization. For the entire industry, lifting, walking industrial upgrading, product upgrading, technological innovation, marketing model innovation is stronger placanticline crane industry and the country's key.
In the context of global economic restructuring, lifting machinery industry development trend of slowdown is inevitable. China's manufacturing purchasing managers index (PMI) 2013 year April index was 50.6, down 0.30%, which we analysts believe the industry is still in the stage of stabilization row irresolute. At what time it comes to bridge crane  can really pick up when Yangshu Yan analysis, the future lies in integration and opportunities for more innovative marketing model. At present, the Chinese crane industry is still relatively extensive mode of development, technological innovation capability is weak, low value-added products, the overall big but not strong, the real recovery in the industry should be in the end of 2015.
How quickly achieve industrial transformation and upgrading, smoothly through the downturn adjustment period? How in the future market competition in the next round to seize the high ground, the entire hoist crane  in the future development process need to solve the primary problem. "

Light and small lifting equipment sales continued to grow business electricity suppliers need to follow up the pace

2013 January to April, China's small light lifting equipment production and sales continued to grow, as the second half of the small light eot crane  industry development has brought good news, leaving small small light lifting equipment business development firm belief electricity supplier , the pace of business electricity supplier in constant follow-up.

Small lifting equipment future development of good corporate electricity providers follow the pace

In recent years, small light lifting equipment in the domestic market, more and more attention. Especially jacks, pneumatic hoists, winches and other light small lifting equipment has been rapid development, local small and medium enterprises small light lifting equipment sprung out of a thriving scene.

The data show that the first quarter of 2013, China's small light lifting equipment industry, industrial output value reached 10.733 billion yuan, an increase of 14.98%; industrial sales output value of 10.537 billion yuan, an increase of 14.73%. In addition, our small light bridge gantry crane  industry, total imports and exports 775 million U.S. dollars, an increase of 9.09%. Among them, exports 557 million U.S. dollars, an increase of 15.45 percent, and imports $ 218 million, an increase of -4.36%.

These figures are the same as the booster, light lifting equipment companies to bring relief. But who would have thought that in 2012, small and medium enterprises have small light lifting equipment faced marketing problems.

Small light lifting equipment such as a traditional business, because such a large crane to attach lifting equipment, so the sales target and channel is very narrow, even only as an accessory heavy industries do not have their own innovative technology and broad market . Low-profit products, no market competition, companies always face closure.

After all, the traditional single marketing channel has been unable to meet the fierce competitive market, small overhead gantry crane  companies need to find a platform for their own electricity supplier. Enterprise Development electricity supplier is not impossible, find a way to enter the field of electronic commerce is the most important.

Analysis expected in the next 10 years, the small light lifting equipment industry developed well, the market is a large space, network marketing will become a major way.

Crane parts industry development status and future trend analysis

The face of the huge crane market demand , China's gantry crane auxiliary equipment enterprises have increased their marketing and development efforts . But the vast majority of companies are still doing some of the more traditional way , relying on low- price competition to gain market share . So, small businesses how to change this situation , to seek a breakthrough to develop it ?

Industry Status

Along with the increasing emphasis on the construction machinery industry , in recent years , China's crane industrial policy direction infrastructure components will start doing financial subsidies. In other words, such as spreader rigging , lifting appliances and other bridge gantry crane spare parts industry, will be a good opportunity for development.

The data show that the first quarter of 2013, the overall development of construction machinery industry exceeded early expectations. This fully shows that China is increasing investment in infrastructure , energy and other construction projects , driven to the crane industry has brought high-speed growth , crane auxiliary equipment market much room for improvement .

Business problems

Spreader rigging, is the most commonly used auxiliary hoist gantry crane , lifting devices used for lifting heavy objects , in order to meet the daily maintenance of large-scale machinery lifting and improve operating efficiency . 2008 world financial crisis , China's sling is developing very rapidly , either export or domestic sales have reached the pinnacle of history . Faced with the grim economic situation , a sling sales competition became more intense.

In addition, the spreader rigging companies had also faced with technical standards , and management problems. Some export-oriented enterprises , due to lack of experience on the domestic market , in order to survive , the price war has seriously affected the healthy development of the industry sling . And some envious electricity supplier market for SMEs , impatient sales wrong generous self- development platform or choose to pay huge membership fees platforms , do not get the desired effect, no major increase in sales .

Future Prospects

Future, the crane auxiliary equipment industry is facing the problem of unbalanced supply and demand is mainly manifested in two trends , one is globalization , one customer differentiation. Relatively small crane auxiliary equipment companies, customer-differentiated both opportunities and challenges . In short , products and technology is the core of development , the introduction of network marketing business success mechanism .

Therefore , small and medium enterprises if the crane auxiliary equipment in order to continue to maintain good profit ,overhead gantry crane you need to constantly improving product technology, to meet different customer needs, to ensure that the company's sales starting point in the earnings position.

2013 China lifting equipment industry market conditions

In recent years , in order to meet market demand, domestic enterprises constantly adjust product structure, improve the level of product technology and continuously improve product quality, to provide users with high-quality products , but still mainly targeted at the low-end market , with foreign crane products relative comparison , the quality is also a big gap .
Countries in the infrastructure construction of continuous investment , but also led Steel crane industry to flourish, which develops fast in emerging markets such as Brazil , Russia and so on. China lifting equipment products are gradually towards European markets, on a global scale with the international brand products compete with Taiwan , China crane products in the product technology , production capacity, sales channels, overseas distribution and other aspects of the international market already have the condition . China overhead gantry crane products through years of accumulated technology , product technology matures, major product technology to large-scale , high-speed and dedicated development, standardization and diversification to the general technology development, product performance progressive realization of automation, intelligent and digitized already have the ability to participate in international competition . Chinese enterprises have gradually in sales of large cranes and sales network in areas without creating a new sales outlets around the world looking for new dealers , and the corresponding complete perfect global sales and service network , in order to lay the foundation for the crane industry globalization .
In recent years , in order to meet market demand, domestic enterprises constantly adjust product structure, improve the level of product technology and continuously improve product quality, to provide users with high-quality products , but still mainly targeted at the low-end market , with foreign crane products relative comparison , the quality is also large gaps , mainly reflected in the following aspects: product design sophistication uneven ; technology and assembly technology level varies greatly ; such as poor product quality and stability . Despite the rapid development of China jib crane industry , the rapid expansion of production capacity , on an unprecedented scale , but the product is still generally have a greater gap with foreign countries . "Twelve Five" period of strategic planning will be the key to the transformation of China's economic development stage , lifting equipment industry as the basis for the development of various industries industry also faces enormous development opportunities and challenges.

Second half of the construction machinery and accessories industry, or will usher in a great political situation stable growth

Into July, the construction machinery industry is finally over the first half, "volatile" situation, the industry sources said the current stage of rapid growth to stable growth from the "growing pains" that is, the beginning of the second half, engineering gantry crane  and accessories industry or will usher in a golden political situation stable growth. But expectations are always good, as has been chanted since the beginning of the "recovery" as the specific market situation is such prophecies wish, on the dawn of the unknown. How to make good use of construction machinery parts in the second half of the various policies and market opportunities, is the urgent problem.

Although the first half, the construction machinery industry several major economic indicators showed a negative number, 1-May, most of the products engineering machinery production has continued to decline. Dig earth moving machinery, excavators and loaders decreased production increased more than 5%. However, compaction bridge gantry crane  production rose slightly, up 3.5 percent, down 8.23 percentage points from the previous month. Compared to the previous month, data, production decline was slight improvement.

But the dismal data, and did not affect the industry's confidence on the road to recovery. Association believes that the current development trend of the construction machinery industry is robust. Although the industry is difficult to return to the previous high level of growth in 2011, but the ups and downs of the phenomenon will be rare in the future, steady state growth policies will gradually pull (such as shantytowns, etc.), the situation is still optimistic about the industry as a whole will show steady sustainable development trend.

Even if the development of the industry as experts said, the construction machinery industry is still in a rising channel, but if companies can not focus on solving key parts of the development, then certainly by others. In the complex market environment in the face of fierce competition in the market, bridge crane  parts enterprises should actively seek new ways to find new ways to seize the opportunity.

In addition, the State Council executive meeting held recently pointed out, research, deployment, accelerate the transformation of squatter settlements is one of the new urbanization is expected to leveraging the 300 billion yuan investment market, which will help promote the construction machinery industry to achieve warmer.

The complexity of the construction of nuclear power will affect the development of large-scale engineering machinery

In the comprehensive nuclear safety checks and routine ongoing safety evaluation, based on the National Nuclear Security Administration in February 2012 drafted the "nuclear safety and radioactive pollution prevention" Twelfth Five Year Plan "and the 2020 vision" (hereinafter referred to as "Nuclear security plan") and the whole of society for public comment,hoist gantry crane the State Council examined and approved in the same year in May and issued a "nuclear safety planning." The plan put forward China's 2020 nuclear safety vision: the operation and safety of nuclear installations under construction levels continue to increase, "13 5" (2016-2020) and after the new nuclear units and strive to achieve virtual elimination from the design of radioactive substances the possibility of release; fully completed state supervision of nuclear and radiation safety technology research and development base and the national radiation environment monitoring system; formation of fully functional, responsive, hoist crane and efficient operation of nuclear and radiation accident emergency response system. 2020, to maintain the international advanced level nuclear safety, nuclear safety and to enhance the level of radioactive pollution prevention, radiation, environmental quality remains good.

After the Fukushima nuclear accident, the Chinese government will suspend inland nuclear power plant construction plans. Worldwide, some countries have taken measures to abandon its nuclear program, so that today in the energy sector is affected. For example, in Germany closed after the Fukushima nuclear power plant, the use of wind power generation, but recently affected by no wind, you can not generate electricity; Japan after the accident at the Fukushima nuclear power plant, shutting down part of the nuclear power plants, directly affect their summer supply, while resulting in reduced capacity of local enterprises or to the relocation of production, seriously affecting national economic development. In the construction of new projects for large crawler jib crane and other product performance and technical indicators will be increased accordingly.

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