Gantry crane

Gantry crane
Crane, gantry crane, traveling crane, crane manufacturer, crane wholesale
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The gantry crane is a bridge-type crane in which the horizontal bridge is set on two legs to form a gantry shape. This kind of crane runs on ground rails and is mainly used for handling and installation operations in open-air storage yards, docks, power stations, ports, railway cargo stations and other places.
The hoisting mechanism, trolley operating mechanism and bridge structure of the gantry crane are basically the same as those of the bridge crane. Due to the large span, most crane operating mechanisms adopt separate driving methods to prevent the crane from skewing and increasing resistance and even causing accidents. The lifting trolley of the gantry crane runs on the bridge frame, and some lifting trolleys are just jib-type cranes. The legs on both sides of the bridge are generally rigid legs. When the span exceeds meters, one side is often a rigid leg, and the other side is a flexible leg connected to the bridge through a ball hinge, making the gantry a statically determined system. It can avoid additional stress caused by lateral thrust under the action of external load, and can also compensate for the longitudinal temperature deformation of the bridge. The gantry crane has a large wind area. In order to prevent sliding or overturning under the action of strong wind, it is equipped with an anemometer and an operating system. Crane rail clamp with mechanism interlocking. The bridge can be either without cantilevers at both ends or with cantilevers at one end or with cantilevers at both ends to expand the operating range. The semi-gantry crane bridge has outriggers at one end and no outriggers at the other end, and runs directly on the high platform.
Safety Precautions
When lifting heavy objects, the hook wire rope should be kept vertical, and the lifted object is not allowed to be dragged diagonally.
The center of gravity of the lifted object should be determined and tied firmly. Sharp angles should be padded with wooden skids.
The crane is not allowed to rotate before the heavy object is lifted off the ground.
When lifting or lowering heavy objects, the speed should be even and steady to avoid sudden changes in speed, which may cause the heavy objects to swing in the air and cause danger. When dropping heavy objects, the speed should not be too fast to avoid breaking the heavy objects when they hit the ground.
When the crane is lifting heavy loads, try to avoid the lifting arm. When the boom must be raised and lowered while lifting, the lifting weight shall not exceed the specified weight.
When the crane is rotating while lifting a heavy load, you should pay close attention to whether there are any obstacles around it. If there are any obstacles, try to avoid or remove them.
No one should stay under the crane boom, and try to avoid people passing through.
When two cranes operate on the same track, the distance between the two cranes should be greater than 1.
When two cranes lift an object together, the lifting capacity shall not exceed the total lifting capacity of the two cranes, and the lifting and lifting movements of the two cranes must be consistent.
The lifting luffing wire rope needs to be inspected once a week and records should be kept. The specific requirements must be implemented in accordance with the relevant regulations on lifting wire ropes.
When the truck is running or turning without a load, the hook should be above the ground.
When the wind force exceeds Level 6, work should be stopped immediately. The boom should be turned to the downwind direction and lowered appropriately, and the hook should be hung firmly. The gantry crane must install iron wedges (rail stops) and raise the hook to the upper limit. At the same time, close the doors and windows, cut off the power supply, and pull up the cable wind rope. This should also be done after daily work.
It is strictly prohibited on the crane platform Stack miscellaneous objects to prevent them from falling and injuring people during operation. Frequently used tools should be placed in a special tool box in the operating room.
During operation, sudden speed changes or reversing are not allowed to avoid causing heavy objects to fly in the air. It is not allowed to swing, and it is not allowed to operate more than two operating mechanisms (including auxiliary hooks) at the same time.
When driving, the operator's hands must not leave the controller. When a sudden failure occurs during operation, measures should be taken to safely land the heavy objects. , then cut off the power supply and perform repairs. Inspection and maintenance during operation is strictly prohibited.
The crane shall not be lifted if one of the following conditions occurs
The weight exceeds the rated lifting capacity of the crane.
The weight of the weight is unknown.
The signal is unclear.
The heavy objects are not tied firmly.
Open-air operations are exposed to severe weather such as strong winds above level 6 (level 5 above the beam), heavy rain and fog.
The lighting is not sufficient for night operations. Good.
Cable-stayed.
The wire rope is severely worn and broken, and someone is doing maintenance on the crane or in the machine room.
Because the specific models of product production batches are different, the above pictures are for reference only. Details can be Contact our sales staff for detailed verification.
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