An adjustable bulk coal crushing device and scraper conveyor

Abstract

The invention relates to the field of scraper conveyers for fully-mechanized coal mining of coal mines, in particular to an adjustable large lump coal crushing device and a scraper conveyer. The adjustable large lump coal crushing device is used for pre-crushing large lump coal on the working faces of medium-thickness coal seams, and structurally comprises a base, a first hinge pin, a lifting oil cylinder, a right-angle base, a second hinge pin, a third hinge pin, a telescopic oil cylinder, a third hinge pin, a telescopic base, a driving part, crushing rollers and a protective cover. The adjustable large lump coal crushing device is mounted outside the gob side of a coal blocking plate of a transition trough, rising, falling, stretching, retracting and rotating of the crushing rollers are all controlled by a hydraulic and electric control device flexibly and conveniently, time and labor are saved, and the safety and high efficiency are guaranteed; the heights and the front-back positions of the crushing rollers can be adjusted and locked, the particle size range of lump coal which can be crushed by the crushing device is wide, and mating utilization of a coal cutter and a hydraulic support and normal movement of coal materials are not affected; and the adjustable large lump coal crushing device is particularly suitable for crushing ultra-large lump coal, and the problem that large lump coal on the discharging portion of the head of the scraper conveyer is prone to getting stuck can be effectively solved.

Description

Technical field: [0001] The invention relates to the field of fully mechanized mining scraper conveyors in coal mines, and relates to an adjustable bulk coal crushing device and a scraper conveyor with a pre-crushing function. Background technique: [0002] With the continuous mining of medium-thick coal seams, the phenomenon of flaking and roof caving of the coal wall of the fully mechanized mining face is becoming more and more frequent, and sometimes large-sized coal lumps will be produced. These large lumps of coal are unloaded at the head of the scraper conveyor Scraping is easy to occur, which will block and stagnate the coal flow, and at the same time increase the running resistance, which will eventually cause the equipment to stop. Therefore, it is necessary to break the large coal into a moderate particle size at the unloading place of the scraper conveyor in time to ensure Normal operation of coal flow. Such crushing devices that have been disclosed at present ar...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide an adjustable bulk coal crushing device, which is installed outside the goaf side of the coal retaining plate of the transition slot, the crushing roller can rotate, lift and stretch, the space position can be adjusted, and the particle size range of the crushable coal block is large. , has no effect on the normal operation of the shearer, hydraulic support and coal flow, is suitable for the crushing operation of extra large lump coal, and can effectively solve the problem that the unloading part of the head of the scraper conveyor is easy to be blocked by large lump coal

Images