Bridge, gantry crane with electric hoist safety management standards

A mechanical device approach
1.1 field use bridge,  hoist gantry crane  with electric hoist must be consistent with national and local government regulations allow the use of products.
1.2 type, bridge crane with electric hoist must undergo maintenance, body appearance no rust, no deformation structure, safety devices, complete.
1.3 must be supplied installation, use and maintenance manual, special equipment manufacturing license and product certification and inspection on the first installation documentation.
1.4 type, bridge crane with electric hoist should be the product label, indicating the nominal weight, manufacturing units, product number and date of manufacture.
Two mechanical equipment installation
2.1 installation, you should work according to the site conditions and the installation of special equipment in the preparation of the construction program, which must be reported to the person in charge for approval enterprise technology, the program must be included in the basis of production, installation procedures, testing and other related content. Deal with the division of labor and workers safety and technical tests, to determine the commanding officer, security guard zone delineated and set custodial staff, eliminate job barriers.
2.2 bridge, gantry crane lifting equipment installation must be installed by a qualified unit implementation, operations personnel must be certified and equipped with safety protective equipment, such as helmets, safety belts and so on.
2.3 type, bridge crane track foundation shall meet the following requirements:
2.3.1 subgrade bearing capacity: Lightweight (from the weight of 30kN less) should be 60 ~ 100kPa; medium (from the weight of 31 ~ 150kN) should be 101 ~ 200kPa; heavy (more than from the amount of volume 150kN) should be more than 200kPa.
2.3.2 6m intervals should be set a gauge rod, gauge tolerance of the nominal value of 1/1000, and not more than ± 3mm.
2.3.2 In the vertical and horizontal directions, the top surface of the rail inclination shall not exceed 1/100.
2.3.4 rail joint gap no larger than 4mm, and the other side of the rail joints should be staggered, staggered distance of not less than 1.5m, the joints should be mounted on sleepers, two top rail height difference not greater than 2mm.
2.3.5 at 1m away from the rail terminal must be set buffer stopper, the height of not less than walking round radius. 2m away from the rail terminal limit switch must be set at the touch blocks.
2.3.6 The track should be straight, fish plates connecting bolts should be tightened, plate should be fixed firmly.
2.4 bridge, gantry crane concrete foundation shall meet the following requirements:
2.4.1 The concrete strength of not less than C35.
2.4.2 base surface flatness tolerance of 1/1000.
2.4.3 buried pieces position, elevation and verticality and construction process within the factory specification requirements.
2.5 track and crane operating range should be no obstructions. Cranes shall be built on both sides of the track foundation slope and drainage facilities, and should maintain a safe distance from the pit.
2.6 type, bridge crane metal structure, rail and all electrical equipment, metal enclosure, should be reliable grounding device, grounding resistance should not exceed 4Ω.
2.7 Use the cable gantry crane, cable reels should be provided, distribution box should be set in the middle track.
2.8-powered crane with a slip line, slide wire ends should be marked with bright colors, smooth lines should be set up protective railings.
2.9 style, bridge cranes and overhead transmission lines in place a safe distance
Voltage (kV)
Safety distance (m) <1 10 35 110 220 330 500
In the vertical direction 1.5 3.0 4.0 5.0 6.0 7.0 8.5
In the horizontal direction 1.5 2.0 3.5 4.0 6.0 7.0 8.5
3 Mechanical equipment acceptance
3.1 type,  bridge crane  bell signal horn clear. Boom, hook, lifting, etc. undercarriage flag colors on bright eye-catching logo.
3.2 type, bridge crane meter indicator, lifting limiter and a variety of travel limit switches and other safety devices, good condition complete, sensitive and reliable, and can not be adjusted or removed. Non-limiting device instead of using the limiter and control mechanism.
3.3 bridge, gantry crane wire rope, wire rope manufacturer should be issued by the technical performance and quality documents.
3.4 rope firmly connected with the drum and release rope, the roll should be kept for at least three times.
3.5 type, bridge crane hook and rings welding is strictly prohibited. When one of the following conditions should be replaced:
3.5.1 The surface crack, break.
3.5.2 dangerous section and hook neck with permanent deformation.
Section 3.5.3 lanyard worn at more than 10% of the height.
3.5.4 Hook bushing wear more than 50% of the original thickness.
3.5.5 mandrel (pin) worn than the diameter of 3% to 5%.
3.6 type, bridge crane acceptance, before starting work.
4 people
4.1 type, overhead crane operation are special types of operations, the operator must be trained to obtain special operations permit, certificates.
4.2 The operator must comply with the safety rules, and equipment for routine maintenance.
5 safe use of machinery and equipment
5.1 type, bridge crane operating room should be mat board or insulation board, power should be used to test pencil test after metal structure parts, confirm no leakage before the machine. Upper and lower control room should use the escalator.
5.2 jib crane bridge, gantry crane girder deflection exceeds the specified value, must be repaired before use.
5.3 before operation
5.3.1 The no-load operation should be carried out in the confirmation agencies in normal operation, reliable braking, the limit switch sensitive and effective only after the operation.
5.3.2 Before starting, you should first issue a bell signaled, heavy lifting and lowering operations should be smooth uniform, shall not be used when the hoisting large fast, and should be tied to the rope to prevent swinging.
5.4 jobs
5.4.1 Open jobs gantry, bridge crane, when the case of six or more windy, stop operation and locking rail clamp.
5.4.2 Route prohibited from lifting heavy objects and equipment people pass over. Empty walking, hook should be more than 2m from the ground.
5.4.3 After lifting weights should slow driving, not sudden shifting or moving backwards. Two cranes operating simultaneously, keep 3-5m distance. Strictly prohibited to use a crane pushing another crane.
5.4.4 Crane walking, two drive wheels should be synchronized and found the offset should stop operating, adjusting before it can continue to use.
5.4.5 operation, forbids any person from one to another across the bridge crane bridge cranes up.
5.4.6 The operator enters the control room or bridge maintenance and repair, there should be automatic power interlock device or turn off the power in advance.
5.4.7 Lifting flammable, explosive, toxic and other dangerous goods, should be approved by the safety authorities, and should have the appropriate safety measures.
5.5 job
5.5.1 eot crane gantry crane should be parked at the stop line, with a rail clamp locking and rose to the upper position of the hook; bridge crane trolley should be parked in the middle of two tracks.
5.5.2 Hook raised to the upper position, the hook can not hang heavy objects.
5.5.3 The controller shall appropriated zero, cut off the power, turn off and lock the cab doors and windows.
5.6 Hoist
5.6.1 hoist equipment should be checked before use mechanical parts and electrical parts, wire rope, hook, rope guide, stopper, etc. should be in good condition, the electrical part should be no leakage, grounding device should be good.
5.6.2 The hoist should be set buffers, rail ends should be set bezel.
5.6.3 The job starts when the first heavy lifting should be suspended 100mm from the ground to stop and check hoist brake situation, confirmed only after a formal job intact. Brake by professional service personnel for debugging. Open-air operations, should be fortified canopy.
5.6.4 Do not overload electric hoist lifting, lifting, the hand not holding the rope and between objects hanging objects should be increased to prevent collision.
5.6.5 Lifting an object should be tied securely. Electric hoist lifting weights when walking, the weight should not exceed 1.5m high from the ground. Working intermittently not place heavy objects hanging in the air.
5.6.6 hoist operations occur odor, abnormal conditions such as high temperature, you should immediately stop inspection, troubleshooting before continued use.
5.6.7 Use suspension cable electrical control switch, the insulation should be good, should slide freely, people should have a standing position behind the open space and should be properly 2m push-button operation.
5.6.8 In lifting in decline due to a fault caused heavy loss of control, it is necessary to take urgent measures to no weight at decentralization.
5.6.9 Non-simultaneous operation of two and one or more electric hoist.
5.6.10 In rapid movements must not be lifted.
5.6.11 at rated load hoist brake, down shift amount should not exceed 80mm. Otherwise, the oil should be removed or replaced the brake ring.
5.6.12 After the operation, should be parked in the specified location, hook rises and power off, lock switch box.
6 exit machinery and equipment
6.1 demolition crane prepared special programs.
6.2 Crane dismantling necessary ancillary equipment, tools, rigging and fittings must be safe and reliable performance intact.
6.3 deal with the division of labor and worker safety and technical tests, to determine the commanding officer, security guard zone delineated and set custodial staff, eliminate job barriers.
7 items
7.1 Equipment rental units, units and other lifting equipment installation qualification certificates, business licenses, safety production license.
7.2 Mechanical equipment leasing contract.
7.3 Mechanical equipment installation and removal of the contract (rental unit without installation, removal qualification) and installation, dismantling safety management protocols.
7.4 Installation, removal of special construction program.
7.5 total package units, equipment rental units together to operating personnel, installation dismantle the safety technical tests.
7.6 special operations personnel registration form (attached copy of valid ID).
7.7 installation, removal, plus festival inspection records.
7.8 Use permits and inspection reports.
7.9 running (use, repair, maintenance, troubleshooting, stagnation, accident), replacement parts and shift such records.
7.10 inspection records
7.11 daily use of security technology correspondent.