Clean-up grab with rake and shovel teeth that can slide relative to each other

Abstract

The invention discloses a grab bucket of which a rotation harrow and shovel teeth can relatively slide. The pollution removing grab bucket can remove pollutants of a pollutant retaining grid and comprises the rotation harrow (1), the shove teeth (2), an upper stream side grab bucket frame (3), a lower stream side grab bucket frame (4), a rotation harrow drive device (5), grab bucket frame guiding devices (6, 7), a grab bucket frame drive device (8), a hydraulic oil tank (9), a suspension body (10) and a grab bucket guiding device (11). The upper stream side grab bucket frame of the pollution removing grab bucket can move up and down relative to the shove teeth (2) under the drive of the grab bucket frame drive device (8) and the guidance of the grab bucket frame guiding devices (6, 7). When the rotation harrow (1) moves downwards and arrives at the lower portion position shown in the diagram to be closed, the pollution removing grab bucket catches pollutants on the lower portions of the shovel teeth (2). The rotation harrow (1) moves upwards under the drive of the hydraulic oil cylinder (8) in a closed state, so that the pollutants on the face of the pollutant retaining grid can be removed by being clamped and moved upwards to the closed position of the grab bucket, and the grab bucket firmly clamps the pollutants. As part of the pollutants on the lower portions of the shovel teeth (2) are removed under the drive force of the oil cylinder (8) of the grab bucket. Compared with an existing grab bucket, the pollution removing grab bucket has the good pollution removing effect and light self weight.

Description

technical field [0001] The invention relates to a mechanical device used for cleaning the trash rack at the water inlet of a hydro turbine of a power station or a water diversion port of a pump station. The invention is matched with the mechanical device to perform the cleaning work of the trash rack. Background technique [0002] Trash racks are generally installed at the water inlet of hydro turbines in power stations or water diversions of pump stations to intercept dirt in the water to prevent the dirt from endangering the safe operation of turbines or pump stations. The dirt attached to the surface of the trash rack and the dirt accumulated in front of the trash rack should generally be removed by cleaning equipment, so as to prevent these dirt from causing head loss and endangering the safety of the trash rack. The dirt-cleaning grab is a kind of dirt-cleaning device used in conjunction with the aforementioned dirt-cleaning equipment to remove dirt attached to the fron...

AI Technical Summary

Problems solved by technology

However, the problem with this cleaning grab is that many of the dirt under the shovel teeth of the cleaning grab are located at the lower part of the shovel teeth of the grab. When the cleaning grab is closed, this part cannot be grasped. The dirt on the lower part of the tooth prevents the cleaning grab from achieving a good cleaning effect

However, the problem with this method is that in actual use, it is difficult for the clamping device to clamp the trash rack to the position of the trash rack, and when the clamping device clamps the trash rack, it will damage the trash rack. Anti-corrosion layer, causing damage to the trash rack

Due to the above reasons, this method is rarely used at present.

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