Method for preventing spillway gate from falling after being lifted

Abstract

The invention discloses a method for preventing a spillway gate from falling after being lifted. The method comprises the following steps that firstly, an opening signal of the spillway gate and the output voltage of a frequency converter in a spillway gate hoist are monitored, and an opening signal measured value and an output voltage measured value of the frequency converter are obtained; secondly, the falling speed of the spillway gate is obtained through calculation according to the opening degree signal measured value; and thirdly, according to the output voltage measured value of the frequency converter or the falling speed of the spillway gate, a corresponding operation process is carried out. Specifically, when the output voltage measured value of the frequency converter is largerthan or equal to 35 V and the falling speed of the spillway gate is smaller than 0.03 m / s, the spillway gate normally ascends or descends; when the output voltage measured value of the frequency converter is smaller than 35V, the operation process of resetting to release a safety brake and quit the rising or falling of the spillway gate is started, and an alarm statement is output; and when the falling speed of the spillway gate is larger than or equal to 0.03 m / s, the spillway gate stop operation process is started. According to the method, the anti-falling fault after the spillway gate is lifted can be pre-judged, and potential safety hazards in the flood prevention and control and production process are reduced.

Description

technical field [0001] The invention relates to a monitoring system for a spillway door, in particular to a method for preventing falling of a spillway door after being lifted. Background technique [0002] A hydropower station is a comprehensive engineering facility that can convert water energy into electrical energy; it is generally composed of a reservoir formed by water retaining and drainage structures, a water diversion system for a hydropower station, a power plant, and electromechanical equipment. Water release structures refer to buildings used to vent floods or empty reservoirs, such as open river bank spillways, overflow dams, flood discharge tunnels, and bottom holes. Spillways of hydropower plants are usually equipped with arc gates. The arc gate is a gate with a partially arc-shaped surface of a cylinder. The support hinge of its arm is located at the center of the circle. When opening and closing, the gate rotates around the support hinge. The rotating door ...

AI Technical Summary

Problems solved by technology

As the service time of the device increases, the overflow door may fall after being lifted, while the existing overflow door only controls the power supply, inverter Control the power supply to monitor and judge, and it is impossible to predict the fall of the spillway door after it rises, which has great hidden dangers for flood control and safety production

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