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Why does the screw hoist have a top gate accident? what is the reason?

Edit:Xinertai Hydraulic MachineryUpDate:2019-06-14

The structure of the screw hoist is very simple, and the installation is relatively simple. It is widely used in the opening and closing of the culvert gates and the gates on the water diversion hub. However, in the process of use, there are often top gate incidents. The reason for this incident is How? Let's explain it to us.

Reasons for the top gate incident:

1. The top gate incident caused by human factors

The operator is careless about the operation, and does not follow the gate opening and closing procedures to check first, and then the operation or the original operator asks for leave due to an accident, and 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 thinks that it will not be able to stop immediately when the brake reaches the lower limit position. Some of the limit nuts and limit signs of the screw are shifted, which will 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 block the reaction force, but the limit mark or limit switch on the screw is not in place, and there is no limit stop or the effect of prompting the operator to stop. Therefore, the operator will not stop the machine, and the hoist will drive the gate to continue down When the reaction force exceeds the endurance of the gate hoist or the gate hoist, a top gate incident will inevitably occur.

In the process of use, pay particular attention to the top gate incident of the screw hoist. If such incidents occur, they must be dealt with in a timely manner to avoid more serious incidents.

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