Cutting tooth coal-cutting external spraying device of coal cutter

Abstract

The invention provides a cutting tooth coal-cutting external spraying device of a coal cutter. The spraying device comprises a coal cutter body, a lifting device and a spraying pipe, wherein the lifting device comprises a spraying arm, a fixed arm and a hydraulic cylinder; the praying arm, the fixed arm and the hydraulic cylinder are positioned in a triangle mode; one end of the spraying arm is movably connected with one end of the fixed arm, the other end of the fixed arm is movably connected with one end of the hydraulic cylinder, a piston rod is arranged at the other end of the hydraulic cylinder, and the other end of the spraying pipe is movably connected with the piston rod; the lifting device is in welded connection with the outer side of the front end of an external protective frame of a cutting motor of the coal cutter through the fixed arm; the spraying pipe is fixed on the top of the spraying arm and is a hollow seamless steel pipe, the bottom of the spraying pipe is connected with a water supply pipe, and a nozzle is arranged on the top of the spraying pipe; multiple nozzles are arranged on the surface of the periphery of the spraying pipe. According to the device, the lifting angle of the spraying pipe can be controlled in real time, the dust fall efficiency is improved, and water resources are saved.

Description

technical field [0001] The invention relates to an automatic spraying and dust-reducing device when a shearer pick cuts coal in an underground coal mining face, in particular to an external spraying device for cutting coal with a shearer pick. Background technique [0002] The peak period of dust production in the underground coal mining face is mainly concentrated in the coal cutting period of the shearer drum pick. Spray dust suppression is a common method and key measure to control the dust generated by the coal cutting machine. At present, the internal and external spraying devices of coal shearers are widely used, but none of them can meet the actual needs of production, and the dust removal effect is not ideal: (1) The water supply pipeline of the internal spraying device must pass through the rotating drum and shaft, etc. There are many movable connections, and the water supply pressure requirements (2) The external spray device is installed on the shell of the sheare...

AI Technical Summary

Problems solved by technology

At present, the internal and external spraying devices of coal shearers are widely used, but none of them can meet the actual needs of production, and the dust removal effect is not ideal: (1) The water supply pipeline of the internal spraying device must pass through the rotating drum and shaft, etc. There are many movable connections, and the water supply pressure requirements (2) The external spray device is installed on the shell of the shearer, spraying from the body to the shearer pick, resulting in a long range, and the water curtain cannot completely wrap the shearer pick; (3) The external spray device is installed on the shearer shaft On the arm, although the spray device moves with the movement of the shearer drum picks, when the shearer is cutting coal normally, the nozzle is easily covered by the coal that is rotated out of the drum, and the mist flow cannot be sprayed out, and the dust source cannot be covered. (4) semi-automatic control, not only labor-intensive, but also a waste of water resources

Images