A kind of anti-fall method of spill door after lifting

Abstract

The invention discloses a method for preventing falling of a spillway door after being lifted, which comprises the following steps: the first step is to monitor the opening degree signal of the spillway door and the output voltage of a frequency converter in the hoist of the spillway door to obtain the opening degree The measured value of the signal and the measured value of the output voltage of the frequency converter; the second step is to calculate the falling speed of the spillway door according to the measured value of the opening signal; the third step is to make a corresponding calculation according to the measured value of the output voltage of the frequency converter or the falling speed of the spillway door Operation process; when the measured value of the output voltage of the inverter is ≥35V and the falling speed of the spill door is <0.03m / s, the overflow door will go through the normal rising or falling operation process; when the measured value of the output voltage of the frequency converter is less than 35V, the reset will be started Release the safety brake and exit the rising or falling operation process of the spill door, and output an alarm statement; when the falling speed of the spill door is ≥0.03m / s, start the overflow door to stop the operation process. The invention can predict the fall prevention failure after the overflow door is lifted, and reduce the safety hazards in flood control and production process.

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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