Coal wall side crushing device of coal mining machine with large mining height

Abstract

The invention discloses a coal wall side crushing device of a coal mining machine with the large mining height. Each crushing mechanism (100) comprises a main frame (110), a large swing oil cylinder (120), small swing oil cylinders (130), a cantilever (140) and crushing hammers (150). Output flanges I (121) of the large swing oil cylinders are connected to the lower ends of the main frames. The cantilevers are connected to the right ends of the main frames. The small swing oil cylinders are mounted on the right sides of the cantilevers. The crushing hammers are connected with output flanges II(131) of the small swing oil cylinders. The coal wall side crushing device further comprises a gangue blocking device (200) and height-adjustment oil cylinders (300). The gangue blocking device is connected to the cylinder walls of the large swing oil cylinders through flanges (122). Piston rods (310) of the height-adjustment oil cylinders are hinged to the gangue blocking device. Cylinder barrels (320) of the height-adjustment oil cylinders are hinged to a fixed seat mechanism (400) located at the upper end of a rack of the coal mining machine. The bottom of the gangue blocking device is hinged to the fixed seat mechanism. The coal wall side crushing device can crush large chunks of coal rock collapsing on the coal rock side wall efficiently, the crushing range is large, the crushing position is accurate, and adjustment is easy.

Description

technical field [0001] The invention relates to a coal shearer, in particular to a coal arm side crushing device of a large mining height coal shearer, which belongs to the technical field of underground coal mining equipment. Background technique [0002] Shearers are one of the important equipments to realize the mechanization and modernization of coal mine production. They are mainly divided into four types: sawing type, planing type, drilling type and milling type. Different types of shearers are selected according to different geological conditions. In recent years, coal mines with thick coal seams and extra-thick coal seams have been explored successively in various places. This kind of coal mine must use large mining and high coal mining technology. High efficiency, low requirements, low cost, simple coal mining process, short roadway excavation length and small maintenance; compared with the fully mechanized mining face, large mining height produces fine coal particl...

AI Technical Summary

Problems solved by technology

[0003] However, the large mining height coal mining technology also has many limitations. Due to the large range of the large mining height coal mining face, the coal and rocks cut by the shearer are scattered in a wide range, and the movement space of the large mining height shearer is also relatively large. Generally, the shearer is much larger, and the distance between the support beam and the mining working face is relatively long, which leads to serious problems of roof fall and slab side, and it is difficult for the hydraulic support to ensure the stability of the support surface.

After the occurrence of roof fall and slabs, large pieces of coal will collapse and press against the shearer body, causing the shearer to fail to operate normally, and some super large pieces of coal cannot be transferred by the scraper conveyor under the body , it needs to be reasonably crushed before it can be transported; in order to solve the above problems, some existing coal mining machines install a drum-type crushing mechanism at the front end, and adjust the height of the crushing drum according to the size of the coal or rock. It can only crush the coal rocks falling in front of the shearer, but it can't do anything about the collapsed large coal rocks on the side of the coal wall in the middle of the shearer, resulting in blockage of the working face due to the large collapsed coal rocks on the coal wall side Affect the working efficiency of the shearer

Images