A spray dust reduction structure for a pressure-type ventilation comprehensive excavation working face

Abstract

The present invention discloses a spray dust suppression structure for a forced-in ventilation comprehensive excavation working face, which includes a fixing device, an adjustment control device and a spray device, wherein the spray device is connected to the fixing device, the fixing device is fixed to the end of a hard wind tube of different diameters, and the adjustment control device is connected to the spray device through a pipeline. The present invention can be used in a comprehensive excavation working face adopting forced-in ventilation. The device of the present invention is based on the theoretical basis of the interaction between air and water phases, and utilizes the dispersion effect of compressed air and the mutual influence with liquid flow to produce a spray of fine droplet size or a spray of coarse droplet, and obtains a spray of different dispersion degrees under the condition of changing the gas pressure or the liquid pressure, thereby better controlling the excavation dust under geological conditions such as different lithology and coal quality, and improving the comprehensive excavation cycle progress to a certain extent, and achieving a good use effect.

Description

Technical Field

[0001] The invention relates to a spray dust reduction structure, in particular to a spray dust reduction structure for a press-in ventilation comprehensive excavation working face, and belongs to the technical field of coal mine dust prevention and dust reduction equipment. Background Art

[0002] When excavating a coal mine with a comprehensive mechanized excavation face, a large amount of coal dust and rock dust is generated at the cutting part of the excavator, and the dust has a high degree of dispersion. Most excavation faces use forced-in ventilation, especially coal and gas outburst mines, which can only use forced-in ventilation. Because the end of the wind tube is close to the working face, the high wind speed and high turbulence effect cause the cutting dust to spread rapidly to the working space of the personnel, forming a safety hazard, which not only affects the visibility of the working environment, but also seriously endangers the health of the personnel. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a spray dust reduction structure for a pressure-in ventilation comprehensive excavation working face. The present invention can be used in a comprehensive excavation working face that adopts pressure-in ventilation. The device of the present invention is based on the interaction between gas and water phases. It uses the dispersion effect of compressed air and the mutual influence with liquid flow to produce a spray of fine droplet size or a spray of coarse droplets, and obtains sprays of different dispersion degrees under the condition of changing gas pressure or liquid pressure, so as to better control the excavation dust under geological conditions such as different lithology and coal quality. The dust production during comprehensive excavation under pressure-in ventilation conditions and the dust diffusion and spread to the space behind the working face are greatly reduced, avoiding the formation of safety hazards, effectively improving the sanitation standards of the working environment, and to a certain extent improving the progress of the comprehensive excavation cycle, solving the above-mentioned existing problems.

[0004] The technical solution of the present invention is: a press-in ventilation comprehensive excavation working face spray dust reduction structure, which includes a fixing device, an adjustment control device and a spray device, the spray device is connected to the fixing device, the fixing device is fixed to the end of a hard air cylinder of different diameters, and the adjustment control device is connected to the spray device through a pipeline.

[0005] The fixing device includes a rear fixing ring, a front fixing ring, a connecting rod and a pipeline bracket. The rear fixing ring and the front fixing ring are two symmetrical halves connected by fastening bolts to form a ring structure. The rear fixing ring and the front fixing ring are connected by a connecting rod. A pipeline bracket is connected to the front end of the connecting rod. The pipeline bracket is provided with a wind and water pipe fixing hole, and the spray device is fixed through the wind and water pipe fixing hole.

[0006] The connecting rod is provided with a position adjustment groove, and the front fixing ring is connected to the position adjustment groove by bolts and can be adjusted in the position adjustment groove.

[0007] The spray device comprises a gas-liquid atomizing device, an air supply pipeline and a water supply pipeline, wherein the air supply pipeline and the water supply pipeline are fixed in the air and water pipe fixing holes, and the gas-liquid atomizing device is connected to the front ends of the air supply pipeline and the water supply pipeline through a connecting elbow.

[0008] The water supply pipeline is connected in series to the water supply main pipe through a water pipe connecting straight-through and a water pipe connecting tee.

[0009] The air supply pipeline is connected in series with the air supply pipe through the air duct connecting straight-through and the air duct connecting tee to the air supply main pipe.

[0010] The regulating and controlling device comprises an air supply pressure regulating device and a water supply pressure regulating device. The air supply pressure regulating device is connected to the underground air supply pipeline through an air supply valve, and the other end is connected to the air supply main pipe. The water supply pressure regulating device is connected to the underground water supply pipeline through a water supply valve, and the other end is connected to the water supply main pipe.

[0011] The beneficial effects of the present invention are as follows: compared with the prior art, the technical solution of the present invention can be used in a comprehensive excavation face using forced-in ventilation. The device of the present invention is based on the interaction between gas and water phases, and uses the dispersion effect of compressed air and the mutual influence with liquid flow to produce fine droplet size spray or coarse droplet spray, and obtains sprays with different dispersion degrees under the condition of changing gas pressure or liquid pressure, so as to better control the excavation dust under geological conditions such as different lithology and coal quality. The dust production during comprehensive excavation under forced-in ventilation conditions and the dust diffusion and spread to the space behind the working face are greatly reduced, avoiding the formation of safety hazards, effectively improving the sanitation standards of the working environment, and to a certain extent improving the progress of the comprehensive excavation cycle, achieving a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the arrangement of the device of the present invention;

[0013] Figure 2 is a schematic diagram of the fixing device of the present invention;

[0014] Figure 3 It is a schematic diagram of the connection between the spray device and the fixing device of the present invention;

[0015] Figure 4 It is a schematic diagram of air supply pipeline connection of the present invention;

[0016] Figure 5 It is a schematic diagram of water supply pipeline connection of the present invention;

[0017] Labeling: 1. Rigid air duct; 2. Fixing device; 3. Spraying device; 4. Adjustment control device; 201. Rear fixing ring; 202. Front fixing ring; 203. Connecting rod; 204. Pipeline bracket; 206. Wind and water pipe fixing hole; 207. Position fixing bolt; 208. Hinge hole; 209. Fastening bolt; 210. Position adjustment slot; 301. Gas-liquid atomization device; 302. Water supply pipeline; 303. Air supply pipeline; 30 4. Connecting elbow; 305. Air duct connecting tee; 306. Air duct connecting straight-through; 307. Air supply duct; 308. Air supply main; 309. Water pipe connecting straight-through; 310. Water pipe connecting tee; 311. Water supply pipe; 312. Water supply main; 401. Air supply pressure regulating device; 402. Air supply valve; 403. Underground air supply pipeline; 404. Water supply pressure regulating device; 405. Water supply valve; 406. Underground water supply pipeline. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings of this specification.

[0019] Embodiment 1: As attached Figures 1 to 5 As shown, a press-in ventilation comprehensive excavation working face spray dust reduction structure includes a fixing device 2, an adjusting control device 4 and a spray device 3, wherein the spray device 3 is connected to the fixing device 2, the fixing device 2 is fixed to the end of a hard air cylinder 1 of different diameters, and the adjusting control device 4 is connected to the spray device 3 through a pipeline.

[0020] Furthermore, the fixing device 2 includes a rear fixing ring 201, a front fixing ring 202, a connecting rod 203 and a pipe bracket 204. The rear fixing ring 201 and the front fixing ring 202 are two symmetrical halves connected by fastening bolts 209 to form a ring structure. The rear fixing ring 201 and the front fixing ring 202 are connected by a connecting rod 203. A pipe bracket 204 is connected to the front end of the connecting rod 203. A Feng Shui pipe fixing hole 206 is provided on the pipe bracket 204, and the spray device 3 is fixed through the Feng Shui pipe fixing hole 206.

[0021] Furthermore, hinge holes 208 are provided on the pipeline support 204, the rear fixing ring 201 and the front fixing ring 202, and are respectively connected to the connecting rod 203 through the hinge holes 208 and the connecting pieces.

[0022] Furthermore, a position adjustment groove 210 is provided on the connecting rod 203, and the front fixing ring 202 is connected to the position adjustment groove 210 by bolts and can be adjusted in the position adjustment groove 210. The fixing position of the front fixing ring 202 and the connecting rod 203 can be adjusted to change the distance between the spray device 3 and the end of the hard wind tube 1 to meet different usage requirements.

[0023] Furthermore, the spray device 3 includes a gas-liquid atomization device 301, an air supply pipeline 303 and a water supply pipeline 302, the air supply pipeline 303 and the water supply pipeline 302 are fixed in the air and water pipe fixing hole 206, and the gas-liquid atomization device 301 is connected to the front end of the air supply pipeline 303 and the water supply pipeline 302 through a connecting elbow 304.

[0024] Each group of gas-liquid atomizing devices 301 of the spray device 3 is connected by a tee at the end of the hard air supply and water supply pipeline. The connection is simple, easy to assemble and maintain. The number of gas-liquid atomizing devices 301 can be changed by adjusting the tee connection method.

[0025] Both ends of the gas-liquid atomization device 301 are connected to hard air supply and water supply pipelines with threaded structures at the ends, and the spray angle can be adjusted by rotating the threads.

[0026] Furthermore, the water supply pipeline 302 is connected in series to the water supply main 312 through the water pipe connecting straight 309 and the water pipe connecting tee 310 and the water supply pipe 311 .

[0027] Furthermore, the air supply pipeline 303 is connected in series with the air supply pipeline 307 to the air supply main pipe 308 through the air duct connecting straight 306 and the air duct connecting tee 305 .

[0028] Furthermore, the regulating and controlling device 4 includes an air supply pressure regulating device 401 and a water supply pressure regulating device 404, wherein the air supply pressure regulating device 401 is connected to an underground air supply pipeline 403 via an air supply valve 402, and the other end is connected to an air supply main pipe 308, and the water supply pressure regulating device 404 is connected to an underground water supply pipeline 406 via a water supply valve 405, and the other end is connected to a water supply main pipe 312.

[0029] The regulating control device 4 is connected to the spray device 3, and the pressure and flow of the air supply and water supply pipelines can be adjusted, thereby changing the working parameters of the gas-liquid atomization device 301; the regulating control device 4 is mechanical and has high reliability and safety.

[0030] The device of the present invention can significantly reduce the amount of dust generated by comprehensive excavation operations under forced ventilation conditions and the amount of dust that spreads to the space behind the working face, thereby avoiding the formation of potential safety hazards, effectively improving the sanitation standards of the working environment, and to a certain extent improving the progress of the comprehensive excavation cycle.

[0031] The fixing device 2 in the device of the present invention adopts a semicircular front fixing ring 202 and a rear fixing ring 201, which are deformed under the action of the fastening bolts 209 and fixed to the ends of the hard wind tubes 1 of different diameters. When the hard wind tube 1 is close to the comprehensive excavation working face, the position of the front fixing ring 202 in the position movable groove 210 can be adjusted, and the position is fixed by the position fixing bolts 207 to ensure that the distance between the gas-liquid atomization device 301 and the end of the hard wind tube 1 is moderate, effectively solving the problems of poor atomization effect, reduced range of action, and reduced dust reduction effect caused by the distance being too close or too far.

[0032] The spray device 3 in the device of the present invention generates a fine droplet size spray or a coarse droplet spray through the interaction between the gas and water phases. On the one hand, a certain pressure of wind and water is provided to the gas-liquid atomization device through the hard air supply pipe 303, the soft air supply pipe 307 and the hard water supply pipe 302, the soft water supply pipe 311, thereby generating a water mist with a high degree of atomization. On the other hand, the high wind speed and high turbulence effect at the end of the pressurized ventilation duct are fully utilized to further improve the dispersion of the spray droplets and accelerate the movement of the spray droplets to the excavation working face.

[0033] The regulating device in the device of the present invention is mainly composed of an air supply pressure regulating device 401 and a water supply pressure regulating device 404, which are respectively connected behind the air supply valve 402 and the water supply valve 405. After the air and water valves are opened, the gas pressure and liquid pressure in the main air supply pipeline 308 and the main water supply pipeline 312 are controlled to change, and a finer droplet spray is obtained by increasing the gas pressure or reducing the liquid pressure, thereby obtaining a higher gas-liquid flow rate ratio, obtaining water mist with different dispersion degrees, and better adapting to the control of excavation dust under geological conditions such as different lithology and coal quality.

[0034] The gas-liquid atomization device 301 in the device of the present invention is connected to the hard water supply pipeline 302 and the hard air supply pipeline 303 on both sides through the external threaded elbow 304. The spray direction and angle can be adjusted according to the actual on-site conditions such as the excavation section, the distance from the working face, the wind speed at the end of the wind tube, etc., to enhance or weaken the influence of the wind flow on the dispersion and transportation distance of the water mist.

[0035] The gas-liquid atomization device 301 in the device of the present invention is arranged in an assembled form on the fixing device pipe bracket 204, and is combined and connected using the air duct connecting tee 305 and the water pipe connecting tee 310. The number of gas-liquid atomization devices 301 arranged can be adjusted according to the dust generation situation on site, and the assembly and disassembly operations are simple.

[0036] The present invention can be used in a comprehensive excavation face with forced ventilation. The device of the present invention is based on the interaction between gas and water phases. It uses the dispersion effect of compressed air and the interaction with liquid flow to generate fine droplet size spray or coarse droplet spray, and obtains sprays with different dispersion degrees under the condition of changing gas pressure or liquid pressure, so as to better control the excavation dust under geological conditions such as different lithology and coal quality. The generated spray is close to the end of the wind tube, and its high wind speed and high turbulence effect are fully utilized. It not only interacts with the generated spray to improve the dispersion of the spray droplets, but also accelerates the movement of the spray droplets to the excavation face. The droplets with larger particle size hit the coal and rock mass of the working face under the action of inertia to moisten them, thereby reducing the amount of cut dust; the droplets with smaller particle size are ejected to the working face space with the wind flow, and are fully mixed and collided with the suspended dust in the air. Some fine droplets are vaporized under the action of high wind speed, which greatly increases the environmental humidity in the working face and accelerates the sedimentation of fine dust. The device of the present invention can significantly reduce the amount of dust generated during comprehensive excavation under forced ventilation conditions and the amount of dust diffused to the space behind the working face, thereby avoiding the formation of potential safety hazards, effectively improving the sanitation standards of the working environment, and improving the progress of the comprehensive excavation cycle to a certain extent.

[0037] The parts not described in detail in the present invention are all known technologies to those skilled in the art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A spray dust reduction structure for a pressure-type ventilation and comprehensive excavation working face. Features: The invention comprises a fixing device (2), an adjusting control device (4) and a spray device (3), wherein the spray device (3) is connected to the fixing device (2), the fixing device (2) is fixed to the end of a hard wind tube (1) of different diameters, and the adjusting control device (4) is connected to the spray device (3) through a pipeline; the fixing device (2) comprises a rear fixing ring (201), a front fixing ring (202), a connecting rod (203) and a pipeline support (204), and the rear fixing ring (201) and the front fixing ring (202) are both symmetrical halves connected by fastening bolts (209) to form a ring-shaped structure. The rear fixing ring (201) and the front fixing ring (202) are connected via a connecting rod (203); a pipeline support (204) is connected to the front end of the connecting rod (203); a wind and water pipe fixing hole (206) is provided on the pipeline support (204); the spray device (3) is fixed via the wind and water pipe fixing hole (206); the connecting rod (203) is provided with a position adjustment groove (210); the front fixing ring (202) is connected to the position adjustment groove (210) via bolts and can be adjusted within the position adjustment groove (210); the spray device (3) comprises a gas-liquid atomization device (301), an air supply pipeline (303) and a water supply pipeline (302), wherein the air supply pipeline (303) and the water supply pipeline (302) are fixed in the air and water pipe fixing holes (206), and the gas-liquid atomization device (301) is connected to the front ends of the air supply pipeline (303) and the water supply pipeline (302) through a connecting elbow (304); the water supply pipeline (302) is connected in series with the water supply pipeline (311) to the water supply main pipe (312) through a water pipe connecting straight-through (309) and a water pipe connecting tee (310); the air supply pipeline (303) is connected to the water supply main pipe (312) through an air pipe connecting straight-through (309) and a water pipe connecting tee (310). 6) and the air duct connecting tee (305) and the air supply pipe (307) are connected in series to the air supply main pipe (308); the regulating control device (4) comprises an air supply pressure regulating device (401) and a water supply pressure regulating device (404); the air supply pressure regulating device (401) is connected to the underground air supply pipeline (403) through the air supply valve (402), and the other end is connected to the air supply main pipe (308); the water supply pressure regulating device (404) is connected to the underground water supply pipeline (406) through the water supply valve (405), and the other end is connected to the water supply main pipe (312).

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