Spray nozzle mounting pedestal in drum shearer

Abstract

The invention discloses a spray nozzle mounting pedestal in drum shearer. The spray nozzle mounting pedestal comprises a shell and a valve core, the shell is composed of a water inlet hole, a water outlet hole, a left sidewall, a right sidewall and a circular tube wall, the valve core is composed of a sealing cone, a spring, a sealing circular plate, sealing rings and a thimble, the port of the water inlet hole connected with the left sidewall and the port of the water outlet hole connected with the right sidewall are respectively provided with a sealing ring, the left sidewall and the right sidewall are respectively arranged at the left port and the right port of the circular tube wall, the spring is positioned in the circular tube wall, and is in a compressed state, one end of the spring is connected with the sealing cone, the other end of the spring is connected with the sealing circular plate, the other surface of the sealing circular plate is provided with the thimble, the cone mouth of the sealing cone is pushed into the water inlet hole under the spring action of the spring, and the sealing circular plate clings to the right sidewall. Water flow can pass through the pedestal and enter a nozzle during normal work; when the nozzle sheds, the sealing circular plate closes the water outlet hole to prevent water flow short circuit; and when the water pressure is too low or water supply is cut off, the sealing cone closes the water inlet hole to prevent intrusion of coal rock chips into a water supply system.

Description

technical field [0001] The invention belongs to the technical field of mining devices, and in particular relates to an installation base of a spray nozzle in a drum shearer capable of preventing short circuit of water flow and blockage of a water supply system when the nozzle falls off, the water pressure is too low or the water is cut off. Background technique [0002] The mechanical mining face is the main source of dust in modern coal mines, and the dust produced by coal cutting by coal mining machines accounts for about 80% of the total dust in the working face. "Coal Mine Safety Regulations" stipulates that coal shearers must be equipped with internal and external spray devices. At present, the dust reduction of coal shearers in most mining areas in my country mainly depends on their own internal and external spraying systems. The coal mining machine spray dust suppression system is the most critical device to directly reduce the flour dust in fully mechanized mining. ...

AI Technical Summary

Problems solved by technology

[0003] Judging from the actual use of the spray in the shearer, it is often caused by the short circuit of the water flow caused by the shedding of individual nozzles, which causes the water supply pressure and water volume of other nozzles to drop, resulting in nozzle blockage and affecting the normal use of the internal spray.

At the same time, when the water supply pressure of the internal spray system is too low or the water is cut off, the coal and rock debris generated by the shearer drum cutting coal can enter the water supply system from the nozzle nozzle hole through the nozzle base, making the entire water supply system blocked, and the internal spray system cannot Normal use

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