What are the safety devices of tower crane?
2023-05-30 18:18
1. Each overflow valve in the hydraulic system can suppress abnormal high pressure in the circuit to avoid damage to the hydraulic oil pump and motor, and to avoid overload conditions
2. Boom luffing safety equipment: When an accident occurs and the high-pressure hose or oil pipe in the boom luffing oil cylinder circuit bursts or is blocked, the balance valve in the hydraulic circuit becomes effective, locking the working oil from the lower chamber of the oil cylinder, preventing the boom from falling, and ensuring the safety of the work
3. Boom elastic safety equipment: When an unexpected event occurs and the high-pressure hose or oil pipe in the boom elastic oil cylinder circuit bursts or is blocked, the balance valve in the hydraulic circuit becomes effective, locking the working oil from the lower chamber of the oil cylinder, allowing the crane to retract independently and ensuring safety during operation
4. Height limit device: After the hook is lifted to a regular height, touch the limit weight and open the travel switch; Overwinding" The indicator light is on, blocking the operations of lifting the hook, extending the boom, and lowering the boom together to ensure safety
5. Leg determination equipment: When an accident occurs and the high-pressure hose or oil pipe leading to the straight cylinder of the leg ruptures or cuts open, the bidirectional hydraulic lock in the hydraulic system can seal the pressure oil in the two chambers of the leg sealing cylinder, so that the leg does not shrink or throw out, and then ensure the safety of the lifting work
6. Lifting indicator: The lifting indicator is set on the side of the base arm, and can be clearly observed by the operator sitting in the operating room. It can accurately indicate the elevation angle of the lifting arm and the rated lifting capacity of the crane under corresponding working conditions
7. Fluctuation limit device; For cranes with variable boom amplitude, minimum fluctuation limiters and equipment to prevent boom rebound and tilt should be installed. It is necessary to install a trolley travel switch and terminal buffering equipment for the crane with variable amplitude of the trolley
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E- mail: anyuan77@baimaigroup.cn
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Add：Jiulong Town Industrial Park, Yuechi County, Guang 'an City, Sichuan Province
