Offset cutter and coal plow for planer

Abstract

The invention relates to a coal plow used for mining thin coal seams underground in coal mines, in particular to an offset cutter for a plow head. During the coal plowing process of the traditional planer head, the knives at the same horizontal position on both sides are always reciprocating planing on the coal wall at the same horizontal position. Under the condition of high toughness and undeveloped coal seams, the coal body is extremely difficult to collapse. There are raised coal ridges remaining on the coal wall, so that the plow head needs to overcome greater resistance and greater impact load during operation, resulting in serious wear and tear. The invention provides an offset cutter for the plow head of a coal plow, which includes a cutter body, an umbrella-shaped pick and a cylindrical pick, and the center of the pick is relatively offset from the center of the handle of the cutter body; The upper part of the pick is an umbrella-shaped conical structure, and the lower half is a cylindrical structure with a diameter smaller than that of the umbrella edge. The invention can effectively solve the problems of difficult planing caused by residual coal ridges, serious wear of the planing tool, shedding of picks, etc., and improves the service life of the planing tool and the coal plowing efficiency.

Description

technical field [0001] The invention relates to the technical field of coal plows used for mining thin coal seams in underground coal mines, in particular to an offset cutter and coal plow used for a planer head. Background technique [0002] Coal plows for thin coal seam mining in coal mines have high requirements on mining geological conditions. The cutters used in the plow head of traditional coal plows have a symmetrical structure. During the plowing process, the planing cutters on both sides of the same horizontal position are always at the same horizontal position The upper reciprocating planing coal wall. Under the conditions of high toughness and undeveloped coal seams, the coal body is extremely difficult to collapse, and there are raised coal ridges remaining on the coal wall between adjacent planing tools, resulting in the need to overcome greater resistance during the operation of the planer. The planing tool bears a large impact load, the planing is difficult, ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an offset cutter for the planer head, so as to solve the difficulty in planing caused by the residual coal ridges produced by the planer head in the process of planing the coal wall, serious wear of the planing tool, and the loss of picks, etc. problems, improve the service life of planing tools and coal plowing efficiency

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