Trash remover control system capable of achieving accelerated descending and increasing underwater penetration

Abstract

The invention discloses a trash remover control system capable of achieving accelerated descending and increasing underwater penetration. The system comprises a control switch, a master controller, anadjustable speed motor, a hoisting mechanism and a trash remover. The hoisting mechanism hoists the trash remover to a trash rack orifice, and the trash remover is made to descend at the set uniformspeed to enter the orifice. Then, the master controller controls the adjustable speed motor, the trash remover begins to perform accelerated descending and descends to the preset depth to make contactwith dirt. Meanwhile, the hoisting mechanism immediately pays off a steel wire rope at the higher accelerated speed, and the trash remover is decelerated after the trash remover runs into the dirt and is blocked. After the preset underwater penetration is reached, the adjustable speed motor is immediately decelerated and braked, the hoisting mechanism stops paying off the steel wire rope, and thetrash remover is decelerated until the trash remover is stopped. Due to the fact that the trash remover descends at the certain accelerated speed in the certain descending stroke, the kinetic energyis large, the underwater penetration can be effectively increased, and the problem that due to the fact that the trash remover is blocked by dirt, the underwater penetration is small, and the grabbingefficiency is low can be effectively solved. Due to the fact that the steel wire rope is paid off at the certain accelerated speed instantly, the phenomenon that impact force is uploaded to the hoisting mechanism is avoided, and the effect of protecting the hoisting mechanism is achieved.

Description

technical field [0001] The invention relates to a descending operating system for a cleaning machine of a hydropower station, in particular to a control system for a cleaning machine that accelerates the descent and increases the water entry depth. Background technique [0002] Trash racks are often arranged at the water inlet of a hydropower station to intercept the dirt that may enter the diversion channel in the water flow, so as to prevent the dirt from entering the turbine and affecting its normal operation. The dirt accumulated in front of the trash rack is usually removed by cleaning equipment. [0003] At present, the commonly used cleaning equipment in front of the vertical trash rack is the mobile cleaning grab. When it is working, it is suspended by a steel wire rope and descends into the front opening of the trash rack. The descending speed depends on the gravity of the cleaning machine itself. When working, there will be too much accumulated dirt or the hardne...

AI Technical Summary

Problems solved by technology

However, the effect of these methods to increase the descending depth of the cleaning machine depends on the composition of the dirt. If the dirt has a high accumulation density or the dirt is hard and bulky dirt such as tree roots and branches, the effect of this method is not obvious.

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