Xinertai Hydraulic Machinery
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Manual screw hoist
Manual screw hoist

  HoistThe cause of the top-shut incident:

1. The top gate incident caused by human factors:

Operators work sloppily, do not follow the gate opening and closing procedures to check first, and then operate or the original operator asks for leave due to an accident. The substitute personnel operate blindly when they are not familiar with the opening and closing procedures and methods. If the direction of opening and closing is reversed, the gate is opened when the gate is closed, the wrong button is pressed during electric opening and closing or the direction is reversed during manual opening and closing, and the closing direction is wrongly operated as opening; some are in closing The operator's thoughts are not concentrated, and the brake can not stop immediately when the brake reaches the lower limit position. Some of the limit nuts and limit signs of the screw are shifted, which can not have the limit effect. Electric gate hoist will also encounter power supply phase sequence changes when repairing electrical equipment or power supply lines, causing the motor on the gate hoist to change the original working direction, resulting in a change in the direction of the gate hoist. At this moment, the gate is closed. If the gate is opened in a situation, a top gate incident will occur.

2. Top-gate incident caused by non-human factors:

During the operation of the gate, trees and other floating objects or obstacles such as rocks are brought to the bottom of the gate or rushed into the gate groove by high-speed water. Obstacles obstruct the reaction force, but the limit mark or limit switch on the screw is not in place, and it will not have the effect of limit stop or remind the operator to stop, so the operator will not stop the machine, and the hoist will drive the gate to continue down When the reaction force exceeds the acceptance endurance of the gate hoist or gate, a top gate incident will inevitably occur.

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