What are the safety device methods of gantry cranes?
What are the safety devices of gantry cranes?
1. Relief valves in the hydraulic system: it can suppress the abnormal high pressure in the circuit to prevent damage to the hydraulic oil pump and motor, and to prevent overloading.
2. Boom luffing safety device: When an accident occurs and the high-pressure hose or tubing in the boom luffing cylinder circuit bursts or is cut off, the balance valve in the hydraulic circuit will work to lock the work from the lower cavity of the cylinder Oil, so that the boom will not fall, thus ensuring the safety of the operation.
3. Boom telescopic safety device: when accidents occur, the high-pressure hose or tubing in the boom telescopic cylinder circuit bursts or is cut off, the balance valve in the hydraulic circuit works to lock the working oil from the lower cavity of the cylinder. The hoist will retract by itself to ensure the safety of the operation.
4. Height limit device: After the hook of the gantry crane is raised to the specified height, touch the limit weight, turn on the stroke switch, the "over-winding" indicator light will be on, and the hook lifting and boom will be cut off at the same time Operations such as extending and lowering the boom to ensure safety.
5. Outrigger locking device: When an accident occurs and the high-pressure hose or tubing leading to the vertical cylinder of the outrigger is broken or cut, the two-way hydraulic lock in the hydraulic system can block the outrigger and block the pressure oil in the two chambers of the cylinder to make the support The legs are not retracted or thrown out, so as to ensure the safety of lifting operations.
6. Lifting weight indicator: The lifting weight indicator is set on the closing side of the basic boom, and the operator can clearly observe it when sitting in the control room, and can accurately indicate the elevation angle of the boom and the allowable crane under the corresponding working conditions. Rated lifting capacity.
7. Lifting characteristics table: set on the lower wall panel of the front side of the control room, the table lists the rated lifting weight and lifting height under various boom lengths and various working ranges for easy reference during operation. When the gantry crane is operating, it must not exceed the value specified in the table
Gantry crane
Through gathering the staff of heavy industry gantry crane manufacturers to introduce to everyone, what are the safety devices of gantry cranes? Have you learned it?