Xinertai Hydraulic Machinery
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How to effectively prevent accidents in the gate of hoist

Edit:Xinertai Hydraulic MachineryUpDate:2019-07-29

How to effectively preventHoist gateThe resulting accident is a problem faced by many hoist operators in recent years. At present, the domestic screw hoist is widely used in irrigation districts at all levels due to its simple structure, cumbersome installation, and low price. The upper culvert gate and the gate of the water diversion hub project are opened and closed. However, some screw hoists currently in use do not have effective maintenance measures to prevent the gate accident of the hoist. Even if a limit switch is installed on the dual-purpose hoist with a flashlight, it can only serve as a limit. During the operation of the hoist A little carelessness will cause bending of the screw, crushing the end cover of the hoist, breaking the machine beam, cracking and destroying the upper edge of the reinforced concrete beam, and serious displacement, rotation and overturning of the hoist (beam). Even causing casualties, the electric hoist will also cause the motor to overload and burn the motor, which will seriously affect the safe operation of the project and threaten the safety of the operators. Some small and medium-sized reservoirs have successively used the dual-purpose screw hoist with the flashlight. The occurrence of a top-gate accident is sufficient to clarify that the screw hoist is likely to cause a top-gate accident, and measures should be taken to prevent it to deal with this outstanding problem.

Cleaning is for the surface of the gate hoist, the inside and the circumferential surface of the brake wheel, the electrical contacts, the contact surface of the electromagnet and the surrounding environment, and the cleaning is stopped regularly. The doors and windows inside and outside the hoist room are cleaned once a week, and the tools and utensils on the site should be arranged in time and placed uniformly. Tightening is to stop the tightening of threaded pipe joints and gland bolts for sealing in the pressure oil system to avoid loosening and oil leakage; various positioning bolts, high-strength bolts, wire rope compression bolts, and spreaders for foundations, flanges, etc. If the connecting bolts stop tightening, if they become loose, the force and movement of the connected parts will be changed, and it will constitute a hidden danger of accident.

Adjustment: ①Adjust the matching clearance between bearing bush and journal, rolling bearing, top and side clearance of gear meshing, and brake release clearance between brake shoe and brake wheel.

②Stop adjusting the brake release stroke, clutch clutch stroke, safety limit switch limit stroke and gate opening and closing position indication stroke.

③Adjust the looseness of rotating belts, chains, etc. and the elasticity of springs.

④Adjust current, voltage, braking torque, flow pressure and speed of hoist. Smoothness: For the relative moving parts in the hoisting equipment, it is necessary to maintain good smoothness.

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