Method for removing dirt from trash rack surface in narrow trash rack opening

Abstract

The invention discloses a method for removing the dirt on the surface of the trash rack in the narrow trash rack opening. The interference problem of the moving pulley or the wire rope solves the removal of the dirt on the surface of the trash rack by the narrow trash rack opening with high efficiency. This method is applicable to the occasion where the height dimension of the dirt cleaning grab is smaller than the height dimension from the bottom surface of the hydraulic structure at the upstream side of the trash rack to the top surface of the trash rack. The method is to set the pulley block multiplier of the hoisting mechanism of the lifting mechanism (2) to 1, that is, to directly connect the steel wire rope (3) of the hoisting mechanism (2) Drop to the top of the trash rack (1), and then move the cleaning grab (1) from position A on the top of the trash rack to the hydraulic structure (4) near the upstream side of the trash rack along the direction of water flow The edge B of the trash rack (1) is then lowered to the grid surface of the trash rack (1) for cleaning. Propose the dirt that cleans the dirt grab bucket (2) to grab in reverse order then, carries out the decontamination work of trash rack (1) grid surface dirt.

Description

technical field [0001] The invention belongs to a method for cleaning trash racks at water inlets of hydro turbines in power stations or water diversions in pumping stations. Specifically, it is a method to remove the dirt on the surface of the trash rack in the narrow trash rack opening. Background technique [0002] Trash racks are generally installed in front of the water inlets of hydroelectric generating units or pumping stations of hydropower stations. The dirt attached to the front of the trash racks and the surface of the trash racks needs to be removed to ensure the smooth flow of water. However, for the removal of dirt on the surface of the trash rack in some narrow trash rack openings, the narrow opening cannot accommodate the width of the cleaning bucket or the width of the movable pulley for lifting the cleaning bucket, so that the cleaning work cannot be carried out normally. . In the prior art, this kind of narrow trash rack opening is usually manually clean...

AI Technical Summary

Problems solved by technology

However, for the removal of dirt on the surface of the trash rack in some narrow trash rack openings, the narrow opening cannot accommodate the width of the cleaning bucket or the width of the movable pulley for lifting the cleaning bucket, so that the cleaning work cannot be carried out normally.

In the prior art, this kind of narrow trash rack opening is usually manually cleaned or the narrow and small dirt grab bucket with small bucket capacity is used to remove the dirt on the grid surface of the trash rack. The method is inefficient, high in cost, poor in safety, and often needs to be shut down for cleaning, which affects the normal operation of the hydroelectric generating set or pumping station

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