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.
santo gantry crane
2013年9月6日星期五
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.
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.
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.
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
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.
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.
2013年8月28日星期三
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.
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.
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.
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.
2013年8月27日星期二
The crane features a variety of styles
Cranes are many points Continental
Steel crane , bridge cranes , gantry cranes, double girder bridge crane , column jib cranes and wall cranes and so on. Here to tell you about one of these types of features and functions .
European crane design, small size , light weight , maintenance-free performance, the highest rate of sustained work , and advanced configurations, such as high-strength galvanized steel wire rope , disc brakes, hard surface reducer , programmable from the ceiling bit , ductile iron rope guide , large diameter welded roll , etc. , is the jib crane innovative products . Compared with conventional cranes , wall hooks to limit the minimum distance , minimum headroom , more close to the front of the job , lifting height higher , the actual increase in the effective work of the existing plant space . Because the crane is light weight, small wheel pressure characteristics , the new plant can be designed smaller and more functional .
Overhead bridge crane is the bridge in orbit a bridge crane , also known as the crane . Bridge crane bridge laying on both sides along the elevated tracks run vertically , lifting trolley along the track on the bridge laying sideways to form a rectangle scope of work , you can take advantage of the space under the bridge lifting materials , not hampered by ground equipment
Gantry crane gantry structure is generally based on the form of the main beam form spreader form classification.
Double girder overhead crane carrying capacity, span, overall stability , variety, but the quality of their starting weight with the same single- girder gantry crane compared to the bigger, the cost is higher. According to the main beam structure is different, can be divided into box girders and trusses in two forms. Now more commonly used box -shaped structure .
Column jib crane is the cantilever can be fixed on the base around a fixed column rotation, or a rigid connection between the cantilever and rotary column , the base support with respect to the vertical centerline of the inner rotating cantilever composed by columns and cantilever overhead gantry crane . It is suitable for lifting small, round or operating services sector occasions. Generally used for machine tools and other artifacts chucking and handling .
Walls are fixed crane jib crane on the wall , or you can along the wall or other support structure on an elevated track running boom cranes.
European crane design, small size , light weight , maintenance-free performance, the highest rate of sustained work , and advanced configurations, such as high-strength galvanized steel wire rope , disc brakes, hard surface reducer , programmable from the ceiling bit , ductile iron rope guide , large diameter welded roll , etc. , is the jib crane innovative products . Compared with conventional cranes , wall hooks to limit the minimum distance , minimum headroom , more close to the front of the job , lifting height higher , the actual increase in the effective work of the existing plant space . Because the crane is light weight, small wheel pressure characteristics , the new plant can be designed smaller and more functional .
Overhead bridge crane is the bridge in orbit a bridge crane , also known as the crane . Bridge crane bridge laying on both sides along the elevated tracks run vertically , lifting trolley along the track on the bridge laying sideways to form a rectangle scope of work , you can take advantage of the space under the bridge lifting materials , not hampered by ground equipment
Gantry crane gantry structure is generally based on the form of the main beam form spreader form classification.
Double girder overhead crane carrying capacity, span, overall stability , variety, but the quality of their starting weight with the same single- girder gantry crane compared to the bigger, the cost is higher. According to the main beam structure is different, can be divided into box girders and trusses in two forms. Now more commonly used box -shaped structure .
Column jib crane is the cantilever can be fixed on the base around a fixed column rotation, or a rigid connection between the cantilever and rotary column , the base support with respect to the vertical centerline of the inner rotating cantilever composed by columns and cantilever overhead gantry crane . It is suitable for lifting small, round or operating services sector occasions. Generally used for machine tools and other artifacts chucking and handling .
Walls are fixed crane jib crane on the wall , or you can along the wall or other support structure on an elevated track running boom cranes.
2013年8月26日星期一
Tan Chinese crane rental market situation
Domestic crane rental business after several years of rapid development of the national economy, state-owned subsidiaries from five years ago, a crane rental company dominate the world, the evolution of what is now private and state-owned rival, mainly due to the more open
overhead bridge crane sales up to solve the private financing difficulties, coupled with private enterprises in the decision-making speed and operational flexibility, making the emergence of private enterprises in the crane industry, the Great Leap Forward-style growth. In this context, the domestic crane manufacturing enterprise scale, due to follow the market, there have been extraordinary development.
Beginning last year, but with the domestic economic growth rate to stabilize or even decline, finally appeared crane rental market oversupply, rental prices began to decline, and their utilization rate also decreased rapidly, coupled with the rising cost of the domestic variety, especially labor costs rise, the market has a large amount of small hoist crane , ROI began to rapidly decrease, some operators have begun to appear bad loss, making the driving force behind the development of leasing companies have lost the source, but also to continue the rapid development of manufacturing enterprises no basis, manufacturing companies also benefit from the development to the pursuit of scale to quality development.
Crane is a universal lifting machinery, due to structural wear low, state-owned enterprises will generally be set at a large crane depreciation 14 years, the other for 10 years. However, the current lease with the actual conditions of use, the general life of 20-30 years, this feature makes the crane rental market for more than after a substantial decline in return on assets leasing companies, manufacturers sales may decline substantially, the entire industry will present vicious competition. At present, the domestic leasing market is in this situation.
As previously described one conclusion: China's crane rental market since last year has ended a period of rapid growth, and leasing companies have entered into a vicious competition period, just over two years, the overall decline in rental prices 30-50 %, cranes payback period from 4-6 years, dropped to 6-10 years. Manufacturing companies also quickly dropped from the peak of development, although some factory sales value of these two years is relatively stable, but the gross margin decline. Part of the manufacturer's sales began to fall sharply. If allowed this trend continues,jib crane China crane rental market woeful.
Beginning last year, but with the domestic economic growth rate to stabilize or even decline, finally appeared crane rental market oversupply, rental prices began to decline, and their utilization rate also decreased rapidly, coupled with the rising cost of the domestic variety, especially labor costs rise, the market has a large amount of small hoist crane , ROI began to rapidly decrease, some operators have begun to appear bad loss, making the driving force behind the development of leasing companies have lost the source, but also to continue the rapid development of manufacturing enterprises no basis, manufacturing companies also benefit from the development to the pursuit of scale to quality development.
Crane is a universal lifting machinery, due to structural wear low, state-owned enterprises will generally be set at a large crane depreciation 14 years, the other for 10 years. However, the current lease with the actual conditions of use, the general life of 20-30 years, this feature makes the crane rental market for more than after a substantial decline in return on assets leasing companies, manufacturers sales may decline substantially, the entire industry will present vicious competition. At present, the domestic leasing market is in this situation.
As previously described one conclusion: China's crane rental market since last year has ended a period of rapid growth, and leasing companies have entered into a vicious competition period, just over two years, the overall decline in rental prices 30-50 %, cranes payback period from 4-6 years, dropped to 6-10 years. Manufacturing companies also quickly dropped from the peak of development, although some factory sales value of these two years is relatively stable, but the gross margin decline. Part of the manufacturer's sales began to fall sharply. If allowed this trend continues,jib crane China crane rental market woeful.
The first quarter of 2013 Crane grew by 5.0% to
Fourth quarter of 2012 (September-November), lifting machinery production has increased significantly over the third quarter,Steel crane an increase of 12.0%; according to the fourth quarter, lifting good market performance, the first quarter of 2013 is expected to increase by 5.0%.
Lifting machinery industry has a single quarter from the fourth quarter, the market size has increased, but due to the large environmental impact, the overall market outlook is still not optimistic,overhead gantry crane so the fourth quarter, lifting machinery industry exports $ 622 million, fell 25.7 percent.
2012 fourth quarter lifting machinery industry automation products market size of 936 million, the chain increased 81.8%, representing a decrease of 11.9%. In the fourth quarter, the highest amount of low-frequency applications, and the overall lifting machinery industry automation applications for 41.0%, due to customers' automation products better brand recognition,jib crane brand usage of automation products is relatively stable.
Lifting machinery industry has a single quarter from the fourth quarter, the market size has increased, but due to the large environmental impact, the overall market outlook is still not optimistic,overhead gantry crane so the fourth quarter, lifting machinery industry exports $ 622 million, fell 25.7 percent.
2012 fourth quarter lifting machinery industry automation products market size of 936 million, the chain increased 81.8%, representing a decrease of 11.9%. In the fourth quarter, the highest amount of low-frequency applications, and the overall lifting machinery industry automation applications for 41.0%, due to customers' automation products better brand recognition,jib crane brand usage of automation products is relatively stable.
Special equipment have been carried out around the special rectification
AQSIQ has issued a circular asking all localities to carry out special equipment troubleshooting, and lifting machinery special rectification actions to further implement the special equipment of enterprises the main responsibility for security management,jib crane inspection agency's technical gatekeeper responsibilities and quality inspection departments, according to regulatory responsibility, special equipment to promote further improvement in the security situation.
The range of special equipment troubleshooting, petroleum, chemical, metallurgy, nonferrous metals, electricity, water, construction and crowded places and serious accidents have occurred in recent years in the industry. Factories, docks, garages and out buildings, railways, transport, water and thermal power for use within the construction site crane is lifting the focus of special rectification, accidents, many hidden dangers, weak management and other special equipment will also be included in the scope of the investigation and remediation work.
According to the State Administration of Quality Supervision of Special Equipment Safety Supervision Bureau relevant person in charge,gantry cranegantry crane the troubleshooting and rectification action in four stages, the main contents include: Check the use of special equipment safety management enterprises according to law to implement the main responsibility for the situation; crack down on undocumented and beyond the scope of manufacturing, installation, alteration, repair, and rental license, refusing Supervision, Inspection and other offenses; resolutely ban undocumented units with manufacturing, installation, alteration, repair equipment, and severely punish not legally registered to use, unlicensed operation, Extended not check, no security technology files and other illegal activities; severely punished ultra approved scope inspection, testing undocumented workers do not follow safety procedures inspection violations; seriously do not follow the correct procedures for licensing, registration is not timely, not conscientiously perform their duties of supervision and inspection and other misconduct.
Special Equipment Safety Supervision Bureau official also stated otherwise, "crane safety monitoring requirements" apply to housing construction sites and municipal engineering construction site with crane manufacture, alteration, repair, inspection and supervision and inspection. However, the Housing construction sites and municipal engineering construction site with crane installation, use the supervision and management, according to the relevant laws and regulations implemented.
The troubleshooting and rectification action will be divided into four phases, June 15 is arranged layout stage,bridge gantry crane local quality supervision departments should actively coordinate with relevant departments to develop local troubleshooting and rectification work programs and organizations to mobilize work. After self-correction stage, supervision and inspection phase and the "looking back" and then check the stage will allow the entire monitoring process continues until November 1.
Quality inspection departments relevant responsible person said, through the special equipment and lifting machinery troubleshooting, special work, firmly lifting high accident trend down, ensure the completion of the State Security Committee issued special equipment accident control targets.
The range of special equipment troubleshooting, petroleum, chemical, metallurgy, nonferrous metals, electricity, water, construction and crowded places and serious accidents have occurred in recent years in the industry. Factories, docks, garages and out buildings, railways, transport, water and thermal power for use within the construction site crane is lifting the focus of special rectification, accidents, many hidden dangers, weak management and other special equipment will also be included in the scope of the investigation and remediation work.
According to the State Administration of Quality Supervision of Special Equipment Safety Supervision Bureau relevant person in charge,gantry cranegantry crane the troubleshooting and rectification action in four stages, the main contents include: Check the use of special equipment safety management enterprises according to law to implement the main responsibility for the situation; crack down on undocumented and beyond the scope of manufacturing, installation, alteration, repair, and rental license, refusing Supervision, Inspection and other offenses; resolutely ban undocumented units with manufacturing, installation, alteration, repair equipment, and severely punish not legally registered to use, unlicensed operation, Extended not check, no security technology files and other illegal activities; severely punished ultra approved scope inspection, testing undocumented workers do not follow safety procedures inspection violations; seriously do not follow the correct procedures for licensing, registration is not timely, not conscientiously perform their duties of supervision and inspection and other misconduct.
Special Equipment Safety Supervision Bureau official also stated otherwise, "crane safety monitoring requirements" apply to housing construction sites and municipal engineering construction site with crane manufacture, alteration, repair, inspection and supervision and inspection. However, the Housing construction sites and municipal engineering construction site with crane installation, use the supervision and management, according to the relevant laws and regulations implemented.
The troubleshooting and rectification action will be divided into four phases, June 15 is arranged layout stage,bridge gantry crane local quality supervision departments should actively coordinate with relevant departments to develop local troubleshooting and rectification work programs and organizations to mobilize work. After self-correction stage, supervision and inspection phase and the "looking back" and then check the stage will allow the entire monitoring process continues until November 1.
Quality inspection departments relevant responsible person said, through the special equipment and lifting machinery troubleshooting, special work, firmly lifting high accident trend down, ensure the completion of the State Security Committee issued special equipment accident control targets.
2013年8月25日星期日
Import and export of crane net sales decreased more popular local products
2013 first-quarter decline in imports of
Steel crane . In particular crane dropped significantly, or will no longer be dependent on imports. Indicates that China's crane products intensified international competition, small and medium enterprises to develop electricity supplier crane business effect is obvious, local products are more popular.
Factory store analysis, in 2013 a quarter of imports fell more cranes are cranes, tower cranes, etc.; export side, the same truck cranes, tower cranes share a larger amount. This shows that our cranes have reduced external dependence.
Import and export of a single heavy machine, this is our country's small and medium enterprises hoist gantry crane is definitely good news. One reason is that our product quality improved quickly, out of the country is a fact; the other hand, e-commerce and enterprise, and actively expand sales, lifting equipment factory store with such a platform, opened the network marketing market.
In addition, the country's accelerated development of urbanization, the Chinese crane market outlook is still very uncertain. To meet the trend of development of the industry, the domestic small and medium enterprises have joined the ranks of electricity suppliers. Lifting equipment factory store small crane companies favor by reason, but also for a reason.
Lifting equipment factory store biggest feature is the face manufacturers, pay-for. "Facing the factory" refers to settled factory store suppliers are manufacturers, has its own brand, as some dealers, Erdaofanzi and the like, are not qualified settled factory store; "payment by results" refers only supplier there are orders, and the transaction is successful, only receive a lesser fee. Not a single charge, there are less transaction costs, first under the bottom-line transactions, and is free unlimited settled released products.
No power does business, that is the future of the industry's development is inseparable from e-commerce.jib crane Lifting equipment factory shop willing to work with SMEs to work together to create product value, with a good market environment, sharing electricity providers cake.
Factory store analysis, in 2013 a quarter of imports fell more cranes are cranes, tower cranes, etc.; export side, the same truck cranes, tower cranes share a larger amount. This shows that our cranes have reduced external dependence.
Import and export of a single heavy machine, this is our country's small and medium enterprises hoist gantry crane is definitely good news. One reason is that our product quality improved quickly, out of the country is a fact; the other hand, e-commerce and enterprise, and actively expand sales, lifting equipment factory store with such a platform, opened the network marketing market.
In addition, the country's accelerated development of urbanization, the Chinese crane market outlook is still very uncertain. To meet the trend of development of the industry, the domestic small and medium enterprises have joined the ranks of electricity suppliers. Lifting equipment factory store small crane companies favor by reason, but also for a reason.
Lifting equipment factory store biggest feature is the face manufacturers, pay-for. "Facing the factory" refers to settled factory store suppliers are manufacturers, has its own brand, as some dealers, Erdaofanzi and the like, are not qualified settled factory store; "payment by results" refers only supplier there are orders, and the transaction is successful, only receive a lesser fee. Not a single charge, there are less transaction costs, first under the bottom-line transactions, and is free unlimited settled released products.
No power does business, that is the future of the industry's development is inseparable from e-commerce.jib crane Lifting equipment factory shop willing to work with SMEs to work together to create product value, with a good market environment, sharing electricity providers cake.
Crane turned to heavy investigation
1 Check the hydraulic oil quality
If the hydraulic oil deterioration, the gap will steering pump leakage increases, in turn cause the system pressure is low. Open the fuel tank inspection, normal quality hydraulic oil, oil is plentiful.
2 Check the steering valve with steering cylinder
If the steering valve sticking, its performance should be turned to the heavy side, the other side turn to normal. Steering axle with the jib crane outrigger top up, check clearances and slide steering valve spool volume is normal, indicating steering valve trouble.
Still steering axle jacking state inspection steering cylinder position, and found a good appearance of the hydraulic cylinder, and the active state and the normal stroke volume, thereby indicating that the hydraulic cylinder intact.
3 Check the steering pump
Start the engine, steering pump flowlines touch vibration sense, which illustrate the tubing pressure oil flow steering pump is working properly.
4 detection system pressure
Maximum speed of the engine does not turn the steering wheel, the system pressure should be 2.8 ~ 3.2MPa, the engine idling state, the system pressure should be 2.0 ~ 2.1MPa. The results do not turn the steering wheel, the engine idling, the measured system pressure is only 1.2MPa,gantry crane the maximum engine speed when the system pressure is reduced to 1.0MPa, significantly lower than the nominal steering pressure 2.8MPa. This preliminary determination is due to the heavy steering steering system pressure is insufficient. The reason may be turning vent valve, check valve worn or faulty steering pump.
After further analysis: the crane is not running, the steering valve is also no action under the premise of improving the speed of the engine throttle, the system pressure is lower than the idle state, should turn to vent valve, check valve wear nothing is likely to be caused by poor steering pump oil into the.
5 Overhauling filters
The aircraft steering hydraulic tank from the tank 1, the oil filter 2, a spring retainer 3, spring 4, spacer 5, filter plate 6, the fuel tank cap 7, into the oil filter 8, bolts 9 and other components,bridge gantry crane such as shown in the drawings.
Remove the oil filter 2 will come out and found it to be blocked by dirt. The oil filter 2 retest thoroughly cleaned after loading machine, the fault disappears.
2013年8月23日星期五
Crane accident-prone torque limiter installed imperative
2012 crane accident-prone year, 8.9 days in Zaozhuang Tengzhou Shan State Road and xingtan Road Interchange, a
hoist crane when the crane in the removal of the dumping site, tower crane arm hit two pedestrians, after she died; 7.27 days 16:00 more, Fuyuan Road, Changsha Xiangjiang River Bridge Eastbound gantry crane collapse incident occurred, the construction side in the removal of 120 tons heavy gantry crane, the Bailey rollover occurred, resulting in one death and three injuries. 7.19 at 8:00 pm, Atlantic Railway Lintong District Xinfeng Railway 21 Bureau of the construction site accident, a more than 10 meters above the ground in the construction of the bridge machine suddenly collapsed, causing two casualties; 7.4 at 0:30 Xu, in Lanzhou Qilihe District No. 86 Mars Street, near a construction site, a crane during operation dumping, hit a residential building and a vehicle parked on the roadside and a transformer, the accident caused one death and three injuries ......
In the bloody incident, the local security departments have launched special rectification work crane. Among them, the torque limiter is installed as one of the key checks. After installation torque limiter, overhead bridge crane drivers no longer work with empirical estimates load size, but you can visually see the relevant parameters from the display, a clear understanding of hanging out in the course of the campaign lifting torque variation and the rated lifting torque difference. In this way, the jib crane driver to significantly reduce the intensity of work, thus effectively avoiding the overload and misuse. Reduce crane accident possible, avoid personal injury caused by the accident and economic losses.
In the bloody incident, the local security departments have launched special rectification work crane. Among them, the torque limiter is installed as one of the key checks. After installation torque limiter, overhead bridge crane drivers no longer work with empirical estimates load size, but you can visually see the relevant parameters from the display, a clear understanding of hanging out in the course of the campaign lifting torque variation and the rated lifting torque difference. In this way, the jib crane driver to significantly reduce the intensity of work, thus effectively avoiding the overload and misuse. Reduce crane accident possible, avoid personal injury caused by the accident and economic losses.
Mechanical fasteners market trend analysis
Compared with the international advanced level, the technological level of China's machinery products is relatively backward,Steel crane mainly in product reliability, the whole life, visual quality and information technology level, those gaps are concentrated reflection of the level of the underlying component technologies. China machinery parts manufacturing business has grown to thousands, but most low-tech products,overhead gantry crane can not enter the key components of the mainstream market. Expected future use of mechanical fasteners will show the following trends:
⑴ mechanical fastener enterprises cluster development will be presented. That is similar to the adjacent mechanical fastener business enterprises gather together to lead the local mechanical fasteners Association, through continuous innovation and competitive advantage. Clustered in the mechanical fastener products play an important role in the distinctive private SMEs, they rely on the leading enterprises for OEM production. And in the special areas of both competition and cooperation, and gradually form a chain.
⑵ mechanical fasteners variety of industry to develop and improve the performance expectations of the more urgent. With large-scale major technical equipment, parameter limits and require the development of more high temperature, high pressure and radiation-resistant, corrosion and other performance requirements of new varieties of fasteners.
⑶ information faster. With mechanical fastener enterprises to further expand the market competition in how to effectively use and manage enterprise-wide resource management thinking consequent emergence of corporate information through the ERP computer network systems for enterprise logistics,jib crane capital flow, information flow integration management, the core idea is to realize the "supply chain" tube Henan crushing mechanism. Real demand accurately grasp the pulse of the market and other functions, to support enterprise groups, cross-border operation, its main objective is to fully all aspects of enterprise resource allocation and balancing, suitable for global economic integration, diversification of customer needs, product life cycle shortened such a competitive market environment. This allows enterprises in the fierce competition in the market to play a full range of business potential, allowing companies to be able to achieve better economic efficiency.
⑷ people known mechanical parts industry leader in research and development efforts will increase. In the field of construction machinery, engineering machinery Industry Association and other industry organizations also intends to make the whole enterprise led the formation of several major technology alliances, technical research on key components.
⑸ national authorities to support efforts of spare parts will be gradually increased. Ministry of Industry and Information Technology of the latest documents show that more than 1.5 MW wind turbine gearbox bearings, generator bearings and spindle bearings, gears, yaw pitch hydraulic servo system and sealing systems, wind power tower with a large Specifications of high strength fasteners, leaf mold and the motor stator and rotor parts large precision stamping die; large hydroelectric ball, the runner blade servomotor sealing system; nuclear power plant two pump bearings, new nuclear power main pump three seals , special fasteners and other high reliability of nuclear power will be the future focus of support.
⑴ mechanical fastener enterprises cluster development will be presented. That is similar to the adjacent mechanical fastener business enterprises gather together to lead the local mechanical fasteners Association, through continuous innovation and competitive advantage. Clustered in the mechanical fastener products play an important role in the distinctive private SMEs, they rely on the leading enterprises for OEM production. And in the special areas of both competition and cooperation, and gradually form a chain.
⑵ mechanical fasteners variety of industry to develop and improve the performance expectations of the more urgent. With large-scale major technical equipment, parameter limits and require the development of more high temperature, high pressure and radiation-resistant, corrosion and other performance requirements of new varieties of fasteners.
⑶ information faster. With mechanical fastener enterprises to further expand the market competition in how to effectively use and manage enterprise-wide resource management thinking consequent emergence of corporate information through the ERP computer network systems for enterprise logistics,jib crane capital flow, information flow integration management, the core idea is to realize the "supply chain" tube Henan crushing mechanism. Real demand accurately grasp the pulse of the market and other functions, to support enterprise groups, cross-border operation, its main objective is to fully all aspects of enterprise resource allocation and balancing, suitable for global economic integration, diversification of customer needs, product life cycle shortened such a competitive market environment. This allows enterprises in the fierce competition in the market to play a full range of business potential, allowing companies to be able to achieve better economic efficiency.
⑷ people known mechanical parts industry leader in research and development efforts will increase. In the field of construction machinery, engineering machinery Industry Association and other industry organizations also intends to make the whole enterprise led the formation of several major technology alliances, technical research on key components.
⑸ national authorities to support efforts of spare parts will be gradually increased. Ministry of Industry and Information Technology of the latest documents show that more than 1.5 MW wind turbine gearbox bearings, generator bearings and spindle bearings, gears, yaw pitch hydraulic servo system and sealing systems, wind power tower with a large Specifications of high strength fasteners, leaf mold and the motor stator and rotor parts large precision stamping die; large hydroelectric ball, the runner blade servomotor sealing system; nuclear power plant two pump bearings, new nuclear power main pump three seals , special fasteners and other high reliability of nuclear power will be the future focus of support.
2013年8月22日星期四
Future container cranes container throughput rose steady demand
As the rapid growth of international trade and the gradual increase in the rate of containerization, the global container throughput in 2000 from 200 million TEU to 2011 TEU over 500 million,eot crane an average annual compound growth rate of 12%; Meanwhile, the domestic port container throughput from 20 million to 164 million TEU TEU, an average annual compound growth rate of nearly 30%. Affected by the financial crisis, in 2009 the domestic port container throughput fell by 6% growth in 2010 and 2011 to 18.85% recovery, 11%.jib crane From the port distribution point of view, in 2005 after Inland port container throughput growth of more than 20 percent, faster than the coastal port container throughput.
The next few years, the global container throughput compound annual growth of 8%; taking into account the needs and update new demand is expected to average demand quayside 500, RTG 1000 units. According to "Container Handling Equipment Industry Report," the statistics, China is expected to scale coastal port container throughput in 2020 plan year 2010 actual throughput growth of 190% to 340%, mainly inland port container throughput in 2020 plan year 2010 actual throughput increase of 150% to 1000% "Twelve Five" period, China and quay gantry crane tracks the total market capacity will exceed 1,200 units and 800 units.
The next few years, the global container throughput compound annual growth of 8%; taking into account the needs and update new demand is expected to average demand quayside 500, RTG 1000 units. According to "Container Handling Equipment Industry Report," the statistics, China is expected to scale coastal port container throughput in 2020 plan year 2010 actual throughput growth of 190% to 340%, mainly inland port container throughput in 2020 plan year 2010 actual throughput increase of 150% to 1000% "Twelve Five" period, China and quay gantry crane tracks the total market capacity will exceed 1,200 units and 800 units.
Marine deck cranes and other machinery future technology trends
With the shipping industry on the ship economy, reliability, environmental protection and other aspects of requirements continue to increase, the world's ship is accelerating to the large, intelligent, low-carbon and other direction. Marine equipment is to achieve an important carrier ship performance. To meet the development requirements of marine technology,bridge crane world-renowned deck machinery manufacturers have committed to energy saving, large-scale, modular, intelligent equipment research and development, and has become the leading future trends.
Energy saving
Compared with the hydraulic deck machinery, electric deck machinery with no hydraulic oil, low noise, low power consumption and other advantages, meet the energy requirements of environmental protection has become the development direction of deck machinery technology. Finnish Cargotec Corporation raised its current R & D focus is to reduce the energy consumption of the product life cycle, providing environmentally friendly solutions. Currently, the company is committed to electric gangway, electric deck cranes,bridge gantry crane electric hatch cover drives, electric winch, as well as bulk carriers fully enclosed dust from unloading system development.
Large-scale
With the ship towards the large-scale direction, ship loading capacity to meet the requirements of large-scale marine cranes gradually. Meanwhile, the steering gear, anchor windlass are moving in the direction of the power of large-scale development. 2011, Cargotec Corporation is the world's largest and most advanced offshore construction vessel "Sea Giant" sign manufacture and installation of a Taiwan 400 tons MacGregor brand semi-active heave compensated cranes.
Modular
HATLAPA company, Rolls-Royce and other deck machinery uses a modular design and production patterns, which not only help to reduce production costs, improve product quality and stability, and also contribute to the mass production of products, installation and maintenance.
Intelligent
Microelectronics digital technology widely used, greatly improving the operational control of deck machinery automation,jib crane intelligence level, degree of centralized control and remote control a substantial increase, make the operation more convenient and safe.
Energy saving
Compared with the hydraulic deck machinery, electric deck machinery with no hydraulic oil, low noise, low power consumption and other advantages, meet the energy requirements of environmental protection has become the development direction of deck machinery technology. Finnish Cargotec Corporation raised its current R & D focus is to reduce the energy consumption of the product life cycle, providing environmentally friendly solutions. Currently, the company is committed to electric gangway, electric deck cranes,bridge gantry crane electric hatch cover drives, electric winch, as well as bulk carriers fully enclosed dust from unloading system development.
Large-scale
With the ship towards the large-scale direction, ship loading capacity to meet the requirements of large-scale marine cranes gradually. Meanwhile, the steering gear, anchor windlass are moving in the direction of the power of large-scale development. 2011, Cargotec Corporation is the world's largest and most advanced offshore construction vessel "Sea Giant" sign manufacture and installation of a Taiwan 400 tons MacGregor brand semi-active heave compensated cranes.
Modular
HATLAPA company, Rolls-Royce and other deck machinery uses a modular design and production patterns, which not only help to reduce production costs, improve product quality and stability, and also contribute to the mass production of products, installation and maintenance.
Intelligent
Microelectronics digital technology widely used, greatly improving the operational control of deck machinery automation,jib crane intelligence level, degree of centralized control and remote control a substantial increase, make the operation more convenient and safe.
2013年8月21日星期三
Lubrication and leak-proof cranes
1 crane lubrication basic requirements
Crane lubrication routine maintenance work is an important aspect of the quality of lubrication not only directly affect the functioning of the institutions and mechanical life, but also affect the safety in production and productivity. Therefore, operators and maintenance personnel must always check the eot crane lubrication of lubrication points, time to supplement and replace the lubricant.
Lubrication should follow the principle: whenever a shaft and hole moving with the place, as well as the mechanical part of the friction surface, must be lubricated regularly. Since the conditions of use cranes (utilization rate and the use of the environment, etc.) is different for different parts of the lubrication should be based on a proper understanding of the specific circumstances.
A) the way the crane lubrication
Lubrication jib crane bodies into decentralized and centralized lubrication lubrication.
Small cranes generally use distributed lubrication. Lubrication or oil cup oil gun used for grease lubrication points respectively. Scattered lubrication advantages are: simple structure, reliable lubrication, easy maintenance, easy to purchase used lubricating tools, specifications, and low cost. Disadvantages are: lubrication point spread, add oil when you take some time, outside dew point and more susceptible to dust covered or blockage.
Large lifting cranes, special Steel crane metallurgical use more centralized lubrication. Centralized lubrication of hand pumps and electric pumps centralized refueling refueling two kinds. Quantitative lubrication Centralized lubrication can be timed from a local concentration of supply multiple lubrication points, can reduce the maintenance workload, improve safety and environmental hygiene. Disadvantage is that the structure is complicated and costly.
Crane lubrication routine maintenance work is an important aspect of the quality of lubrication not only directly affect the functioning of the institutions and mechanical life, but also affect the safety in production and productivity. Therefore, operators and maintenance personnel must always check the eot crane lubrication of lubrication points, time to supplement and replace the lubricant.
Lubrication should follow the principle: whenever a shaft and hole moving with the place, as well as the mechanical part of the friction surface, must be lubricated regularly. Since the conditions of use cranes (utilization rate and the use of the environment, etc.) is different for different parts of the lubrication should be based on a proper understanding of the specific circumstances.
A) the way the crane lubrication
Lubrication jib crane bodies into decentralized and centralized lubrication lubrication.
Small cranes generally use distributed lubrication. Lubrication or oil cup oil gun used for grease lubrication points respectively. Scattered lubrication advantages are: simple structure, reliable lubrication, easy maintenance, easy to purchase used lubricating tools, specifications, and low cost. Disadvantages are: lubrication point spread, add oil when you take some time, outside dew point and more susceptible to dust covered or blockage.
Large lifting cranes, special Steel crane metallurgical use more centralized lubrication. Centralized lubrication of hand pumps and electric pumps centralized refueling refueling two kinds. Quantitative lubrication Centralized lubrication can be timed from a local concentration of supply multiple lubrication points, can reduce the maintenance workload, improve safety and environmental hygiene. Disadvantage is that the structure is complicated and costly.
2013年8月20日星期二
Overload caused by tower crane accident
a, lifting more than the rated lifting torque, torque limiter damage, demolition, no adjustments or not regularly check failure caused the accident caused by torque limit. Such incidents more, after an accident caused damage as well. As we all know, the uneven quality of tower bridge gantry crane drivers, many drivers think that the tower crane has certain insurance factor, super point out it does not matter. Knowing tower crane safety factor is to adapt to different working conditions established. An overload does not matter, do not overload the two incidents, accidents are not only feel germination, but as an experience, even as a kind of bragging: "provisions jib crane arm end 1t, 2t I'm hanging on nothing." And I wonder if the disaster is quietly coming.
Comments: tower crane load moment limiter is the most critical safety devices should be regularly maintained, adjusted checked.
b, torque limiter malfunction, night lifting, heavy lifting or hoisting rope caught building or unknown object, causing momentary tower gantry crane tower crane unloaded suddenly overloaded or cause accidents.
Comments: The night blurred vision, easily misjudged; Driver fatigue time jobs, there is often "Early End live, early rest" paralysis and luck.
Overall structure of the crane
Crane boom extending through the outer heavy long arm can be carried to a place far from the machine base, for the vehicle, ship loading and unloading operations. There may be pitching arm tilting and non-tilting level two. Tilt jib crane spreader boom top pulley hanging below the horizontal
jib crane jib crane on a trolley with a spreader. Slewing jib cranes generally by crane slewing and luffing jib crane or trolley runs along the jib, so heavy to move within a certain range. Such lifting capacity of the crane jib minimum amplitude in the rated capacity and rated lifting moment to represent. Slewing crane spreader from the amplitude of the horizontal distance from the centerline, lifting goods lifting moment is gravity and magnitude of the product.
Bridge crane with a horizontal bridge, to cross the obstacles on the ground lifting heavy objects or complete certain process operation. It is widely used in machinery manufacturing and metallurgical sectors such as workshops and indoor and outdoor storage. Overhead hoist gantry crane in orbit, the other bridge crane in the ground track. Lifting trolley tracks run along the bridge frame. Through the bridge and crane trolley movement gained rectangle (sometimes ring) operating range. Characterization of these cranes' main argument is the nominal weight and span (crane orbit two centerline distance between the rails).
Many types of cranes, but its main components are included hoisting mechanism, operation mechanism, luffing and slewing mechanism, and metal structures. Some cranes have completed a certain process operation special equipment, such as cranes clamp clamp.
① lifting mechanism: Cranes basic body of work, mostly by hanging system and winches composition, but also through the hydraulic system lift heavy objects. Hanging system generally consists of wire rope, pulley block (see lifting tackle) and spreader composition, is the most common hook spreader. Lifting winch can be placed in a small car, can also be placed in the crane metal structures on or near the ground, through the retractable rope and lifting heavy objects, sometimes used as a manual hoist electric hoist or lifting mechanism. Some crane hoisting mechanism comes deputy for lifting light weights or auxiliary operations.
② run institutions: to adjust the vertical or horizontal transport of heavy cranes working position, generally consists of motor, reducer, brake and wheel components. Modern cranes, two wheels are usually driven by a separate drive mechanism may also be used by the motor, reducer and brake combined into one "triple play" approach. Lifting trolley body composition and operation of the crane mechanism similar to the horizontal transport of heavy loads or adjust the lateral position of the car. Most cars are self-propelled, that is itself a belt drive; sometimes in order to reduce car weight, may also rope traction, that the drive mechanism mounted on one end of the horizontal arm or bridge.
③ luffing mechanism: Only on the overhead bridge crane was equipped with. Amplitude decreases when the jib looked up, bent over when the amplitude increases. According to the performance requirements can be divided into equilibrium and non-equilibrium luffing luffing two kinds. According to operational requirements can be divided into sex work and non-work luffing luffing two kinds. Balancing Change (also known as level luffing) are: luffing jib system during heavy objects can move along a horizontal or nearly horizontal, center of gravity of the boom system unchanged or move along a horizontal line. Using this system can reduce the energy consumption of Change
Enable smooth and reliable operation. Unbalanced Change (also known as non-horizontal amplitude) is generally the center of gravity and the luffing jib when the center of gravity of the weight to be increased or decreased, jib amplitude decreases when the drive power consumption of large amplitude increases will cause a larger inertial load. Workability is luffing crane luffing under load, the general equilibrium amplitude, non-work luffing crane luffing in no-load conditions, the general non-equilibrium amplitude.
④ rotating mechanism: for the boom swing by the drive and slewing device component. Drive means to drive the rotation part of the rotary crane, slewing crane rotating part of the device that supports the non-rotating part.
⑤ metal structure: It is the skeleton of the crane. Various types of cranes has a different structure. Main bearing parts such as bridge, arm and the door frame may be box-shaped structure or a truss structure, the web structure may be. Some can be used as a steel support beam. The size and weight of the metal structure representing the crane dimensions and a large portion of the total weight. To ensure the strength, stability and rigidity, which is to ensure the metal structure does not damage, does not produce excessive deformation and vibration conditions, to minimize the weight of the structure.
The basic parameters of the crane are nominal weight, the most significant, the maximum lifting height and working speed. These parameters are specified important basis for hoisting technology solutions.
Bridge crane with a horizontal bridge, to cross the obstacles on the ground lifting heavy objects or complete certain process operation. It is widely used in machinery manufacturing and metallurgical sectors such as workshops and indoor and outdoor storage. Overhead hoist gantry crane in orbit, the other bridge crane in the ground track. Lifting trolley tracks run along the bridge frame. Through the bridge and crane trolley movement gained rectangle (sometimes ring) operating range. Characterization of these cranes' main argument is the nominal weight and span (crane orbit two centerline distance between the rails).
Many types of cranes, but its main components are included hoisting mechanism, operation mechanism, luffing and slewing mechanism, and metal structures. Some cranes have completed a certain process operation special equipment, such as cranes clamp clamp.
① lifting mechanism: Cranes basic body of work, mostly by hanging system and winches composition, but also through the hydraulic system lift heavy objects. Hanging system generally consists of wire rope, pulley block (see lifting tackle) and spreader composition, is the most common hook spreader. Lifting winch can be placed in a small car, can also be placed in the crane metal structures on or near the ground, through the retractable rope and lifting heavy objects, sometimes used as a manual hoist electric hoist or lifting mechanism. Some crane hoisting mechanism comes deputy for lifting light weights or auxiliary operations.
② run institutions: to adjust the vertical or horizontal transport of heavy cranes working position, generally consists of motor, reducer, brake and wheel components. Modern cranes, two wheels are usually driven by a separate drive mechanism may also be used by the motor, reducer and brake combined into one "triple play" approach. Lifting trolley body composition and operation of the crane mechanism similar to the horizontal transport of heavy loads or adjust the lateral position of the car. Most cars are self-propelled, that is itself a belt drive; sometimes in order to reduce car weight, may also rope traction, that the drive mechanism mounted on one end of the horizontal arm or bridge.
③ luffing mechanism: Only on the overhead bridge crane was equipped with. Amplitude decreases when the jib looked up, bent over when the amplitude increases. According to the performance requirements can be divided into equilibrium and non-equilibrium luffing luffing two kinds. According to operational requirements can be divided into sex work and non-work luffing luffing two kinds. Balancing Change (also known as level luffing) are: luffing jib system during heavy objects can move along a horizontal or nearly horizontal, center of gravity of the boom system unchanged or move along a horizontal line. Using this system can reduce the energy consumption of Change
Enable smooth and reliable operation. Unbalanced Change (also known as non-horizontal amplitude) is generally the center of gravity and the luffing jib when the center of gravity of the weight to be increased or decreased, jib amplitude decreases when the drive power consumption of large amplitude increases will cause a larger inertial load. Workability is luffing crane luffing under load, the general equilibrium amplitude, non-work luffing crane luffing in no-load conditions, the general non-equilibrium amplitude.
④ rotating mechanism: for the boom swing by the drive and slewing device component. Drive means to drive the rotation part of the rotary crane, slewing crane rotating part of the device that supports the non-rotating part.
⑤ metal structure: It is the skeleton of the crane. Various types of cranes has a different structure. Main bearing parts such as bridge, arm and the door frame may be box-shaped structure or a truss structure, the web structure may be. Some can be used as a steel support beam. The size and weight of the metal structure representing the crane dimensions and a large portion of the total weight. To ensure the strength, stability and rigidity, which is to ensure the metal structure does not damage, does not produce excessive deformation and vibration conditions, to minimize the weight of the structure.
The basic parameters of the crane are nominal weight, the most significant, the maximum lifting height and working speed. These parameters are specified important basis for hoisting technology solutions.
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