SU1659674A1 - Arrangement for dust suppression and prevention of methane explosion at cutter-loader cutting head - Google Patents

Abstract

The invention relates to the mining industry and is intended to dust pressure and prevent the methane explosion at the executive body (IO) of the combine. The goal is to increase the efficiency and reliability of the device by providing coagulation of the dispersed liquid at the outlet and supplying it to the cutting zone of the IO 7 combine and reducing the volume of local accumulations of methane in the roof covering zone of the IO 7 combine. On the boom 6 of the IO 7, its base 5 sets the nozzle into 1 with 9 inner shells expanding to the inner combine 8 and outer 9 shells made of an elastic material and in the form of a side surface of truncated cones mounted coaxially and with a gap relative to each other. Between the shell 8 and the base 5 there is a mixing chamber (K) 2, and between the shells 8 and 9 a suction unit K 3 is placed. Both K 2 and 3 have input 10, 12 and output 11, 13 respectively. The base 5 of the nozzle 1 is made with concave-in K 2 mixing guide 14 placed in its outlet part 11. In K 2 mix nozzles 4 are placed. The irrigating liquid is sprayed by nozzles 4, creates a discharge in K 3 and ejects dust into K 2 . The passage through the nozzle flares 4, the dust due to intense turbulent agitation in K 2 coagulates on the droplets of dispersed liquid. The aerosol generated by the nozzle 1 in K2, sliding off the surface of the visor 14, extinguishes its speed, which ensures the supply of the water / air mixture to the dust generation center. 1 il. (L S ate o o VI Ј

Description

The invention relates to the mining industry and can be used for dust suppression at places of intensive dust emission, as well as for preventing methane explosion at the executive body (IO) of the combine when conducting development workings in gas-hazardous conditions of mines.

The purpose of the invention is to increase the efficiency and reliability of the device by providing coagulation of dispersed liquid at the outlet and supplying it to the cutting zone of the executive body of the combine and reducing the volume of local accumulations of methane in the roofing area of the executive body of the combine.

The drawing shows the proposed device for dust suppression and prevention of methane explosion at the executive body of the combine, longitudinal section.

The device consists of a metal water-air nozzle 1 with a mixing chamber 2, a suction chamber 3 and nozzles 4 placed in the mixing chamber. The nozzle has a base 5, with which it is attached to an arrow 6 of an executive body 7, an outer 8 and an inner 9 shell, made in the form of side surfaces of truncated cones installed coaxially and forming a gap between them and extending to the executive body 7. Suction chamber 3 It has an inlet 10 and an outlet 11 and is located in the gap between the outer 8 and inner 9 shell and the mixing chamber 2 is located between the inner shell and the base and has an inlet 12 and outlet 13, with the base 5 equipped with with a visor 14 inside the mixing chamber, placed in the outlet part 13. The shells are made of an elastic material.

The outlet part 13 of the nozzle 1 is placed at the executive body 7, and the average diameter of the mixing chamber is equal to the diameter of the executive body.

The proposed device works as follows.

The nozzle 1 is mounted on the boom 6 of the tunneling machine. The irrigating fluid pipe is connected to a high-pressure pump (not shown). The irrigating fluid is sprayed by the nozzles 4, creates a discharge in the suction chamber 3 and ejects dusty air into the mixing chamber 2, the dust containing, in the latter, the passage through the nozzles 4 flares due to the intensive

the turbulent mixing in the mixing chamber 2 coagulates on the droplets of the dispersed liquid. At the same time, the nozzle 1 throws a three-phase flow in the form of a truncated cone into the notch slot due to the inner shell 9 and the shaped guide visor 14, which also prevents the dispersed fluid from entering the hub of the combine IO (not shown). The aerosol generated by the nozzle 1 in the mixing chamber 2, sliding off the surface of the profiled visor 14, extinguishes its speed, which ensures the supply of the water-air mixture to the dust generation center at a rate uninterrupted critical, at which dust would be removed from the destroyed rock. surface discharge is not

allows dust to be generated during blasting to enter the generation space. At the same time, the elastic execution of the shells makes it possible to process the face in the sub-roofing and soil zones without failures.

Thanks to the indicated constructive

especially, more efficient ejection, cleaning and insulation of dusty air occurs. By supplying uniform water-air jets around the combine 0, the methane is more efficiently squeezed out from the underside of the slit, reducing its concentration to a safe level and cooling the working edges of the rock-breaking tool and its trace on the bottom plane.

Claims (1)

Invention Formula A device for dust suppression and prevention of methane explosion at the executive body of the combine, including a nozzle mounted on the boom of the executive body, extending to the executive body of the combine, the inner and outer shells installed coaxially and with clearance relative to each other, having input and output parts, a suction chamber and a mixing chamber in which the nozzles are located, characterized in that, in order to increase the efficiency and reliability of the device operation by providing coaxial readings of dispersed liquid at the outlet and its supply to the cutting zone e executive body of the combine and reduce the volume of local accumulations of methane in the roof region near the executive body of the combine, the shell is made of elastic material and in the form of a side surface of truncated cones, the chamber 516596746 Mixing is placed between the inner part with a shell concave inside the chamber and the base, and suction. mixing with a visor, the louver - between the shells, which is located in its output part.