Crushing device of top coal caving hydraulic support

Abstract

The invention provides a crushing device of a top coal caving hydraulic support. The crushing device of the top coal caving hydraulic support comprises a base, an ejecting beam, a front telescopic stand column and a rear telescopic stand column, and further comprises an ejecting block device; the ejecting block device comprises a front telescoping ejecting column, a rear telescopic ejecting column, crushing plates at the upper end of the front telescopic ejecting column and the upper end of the rear telescopic ejecting column, wherein a crushing groove located in the middle is arranged at theupper end of the ejecting beam, a front ejecting column sleeve ring and a rear ejecting column moving groove are arranged in the crushing groove, the bottom end of the front telescoping ejecting column is fixed on the base, the telescoping end of the upper end of the front telescoping ejecting column is installed at the front ejecting column sleeve ring, the bottom end of the rear telescopic ejecting column is fixed on a sliding frame, the telescopic end of the upper end of the rear telescopic ejecting column is installed at the rear ejecting column moving groove, the lower end of the slidingframe is provided with sliding wheels, and the right end of the sliding frame is connected with a telescopic end of a movable hydraulic rod fixed on the base. According to the crushing device, a hardcoal seam is conveniently crushed, the crushing device of the top coal caving hydraulic support tightly presses against the coal seam in the moving process of the crushing device of the top coal caving hydraulic support, and the large hard coal briquette is prevented from smashing the ejecting beam.

Description

technical field [0001] The invention relates to the technical field of coal mine machinery and equipment, in particular to a crushing device for hydraulic supports of caving coal. Background technique [0002] In coal mine machinery and equipment, the top coal caving hydraulic support is stable, the coal opening is continuous, the back loss is small, and the coal caving effect is good. For thick coal seam mining, the equipment investment is small and the cost performance is high. It is suitable for coal seams below medium hardness, joints, cracks There are obviously or well-developed thick coal seams, but in the process of coal mining, it is inevitable to encounter coal seams with high hardness. For coal seams with high hardness, the traditional top-coal caving hydraulic support crushing device exerts less pressure, which cannot actively and effectively break the top-coal and increase the discharge rate of the top-coal. Hard coal blocks are easy to crush the top beam and af...

AI Technical Summary

Problems solved by technology

[0002] In coal mine machinery and equipment, the top coal caving hydraulic support is stable, the coal opening is continuous, the back loss is small, and the coal caving effect is good. For thick coal seam mining, the equipment investment is small and the cost performance is high. It is suitable for coal seams below medium hardness, joints, cracks There are obviously or well-developed thick coal seams, but in the process of coal mining, it is inevitable to encounter coal seams with high hardness. For coal seams with high hardness, the traditional top-coal caving hydraulic support crushing device exerts less pressure, which cannot actively and effectively break the top-coal and increase the discharge rate of the top-coal. Hard coal blocks are easy to crush the top beam and affect coal mining efficiency

Images