Negative-pressure air draft filtering dust removal device for underground excavation working face

Abstract

The utility model relates to a negative pressure air draft filtering dust removal device for an underground excavation working face, and belongs to the technical field of underground dust removal. Comprising a box body, an air inlet pipe and an exhaust pipe are arranged at the front end and the rear end of the box body respectively, a spraying mechanism is arranged on the front side in the box body, a roller is rotationally arranged on the rear side in the box body, the outer side of the roller is wrapped with a layer of filter screen, and a dust blowing mechanism is arranged in the roller; a slag discharging hopper is arranged at the lower end of the box body; a pneumatic exhaust fan is arranged in the exhaust pipe; the problems that existing coal mining working face dust removal equipment is large in dust removal water consumption and poor in dust removal effect are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to underground dust removal technical field, concretely relates to a kind of negative pressure induced draft filter dust removal device for underground mining working face. BACKGROUND

[0002] Traditional coal mine mining working face dust removal generally uses wet dust removal mode, and individual dry dust removal equipment (such as bag filter, cyclone dust removal, etc.) is used;The fan using wet dust removal uses spray dust removal, and the dust removal effect is proportional to the amount of water, which can easily cause mud accumulation in the working area and form secondary pollution of the roadway;At the same time, the fan is driven by electricity, and there is an electrical explosion problem;Due to the dampness of underground, the efficiency of dry dust removal is low;Therefore, the existing underground dust removal equipment has defects. INVENTION CONTENTS

[0003] The utility model overcomes the defects of prior art and provides a negative pressure induced draft filter dust removal device for underground mining working face, which solves the problem of poor dust removal effect of the current coal mine mining working face dust removal equipment.

[0004] In order to achieve the above purpose, the utility model is realized by the following technical scheme.

[0005] A negative pressure induced draft filter dust removal device for underground mining working face includes a box, an air inlet pipe and an air outlet pipe are arranged at the front and rear ends of the box respectively, a spray mechanism is arranged at the inner front side of the box, a roller is rotatably arranged at the inner rear side of the box, a filter screen is wrapped outside the roller, and a dust blowing mechanism is arranged inside the roller.

[0006] Further, the box is a square cylindrical structure arranged horizontally along the front-rear direction, a circular tubular air inlet pipe is arranged at the front end opening of the box, a circular tubular air outlet pipe is arranged at the rear end opening of the box through a pair of connecting flanges, and two left-right symmetrical support skates are fixedly arranged at the lower end face of the box.

[0007] Further, a square through hole is arranged on the bottom plate of the box, and the slag discharge hopper is fixedly arranged at the square through hole;The slag discharge hopper is a trapezoidal cylindrical structure with a wide upper end and a narrow lower end, the upper end and the left end of the slag discharge hopper are both open, the upper end opening of the slag discharge hopper is fixedly connected with the square through hole, and a openable slag discharge door is rotatably arranged at the left end opening of the slag discharge hopper;A scraper is slidably arranged inside the slag discharge hopper, the scraper is a trapezoidal plate structure, and the scraper is in sliding contact with the inner bottom surface, the front inner wall and the rear inner wall of the slag discharge hopper;An operating rod is fixedly arranged at the left end middle part of the scraper.

[0008] Further, the drum is a circular cylindrical structure, and the middle portions of the left and right end faces of the drum are rotatably connected to the left and right inner walls of the box body through bearing supports.

[0009] Further, the air-driven exhaust fan is fixedly arranged in the exhaust pipe, and a first air inlet pipe is arranged at the air inlet of the air-driven exhaust fan, and the first air inlet pipe is in communication with the compressed air pipeline in the mine.

[0010] Further, the spraying mechanism comprises a mixing box, a second air inlet pipe, a water inlet pipe, a spray head and a spraying pipe, the mixing box is fixedly arranged on the top of the box body, one end of the second air inlet pipe is in communication with the inside of the mixing box, and the other end of the second air inlet pipe is in communication with the compressed air pipeline in the mine; one end of the water inlet pipe is in communication with the inside of the mixing box, and the other end of the water inlet pipe is in communication with the water supply pipeline in the mine; the front and rear rows of spray heads are fixedly arranged on the top plate on the front side in the box body, each row comprises three spray heads, and each spray head is in communication with the inside of the mixing box through a spraying pipe.

[0011] Further, the dust blowing mechanism comprises a dust blowing pipe and a third air inlet pipe, the dust blowing pipe is an L-shaped pipe structure, comprising a horizontal section and a vertical section, the horizontal section is arranged at the lower side in the drum, the horizontal section is arranged horizontally along the left-right direction, a row of air injection ports are arranged at the lower end of the horizontal section, and the air injection ports vertically downwardly face the inside of the filter screen; the vertical section is arranged along the radial direction of the drum, one end of the vertical section is in communication with the left end of the horizontal section; one end of the third air inlet pipe is connected to the air outlet of the air-driven exhaust fan, and the other end of the third air inlet pipe is connected to the end of the vertical section of the dust blowing pipe, which is away from the horizontal section and passes through the left side wall of the box body and the left end center of the drum.

[0012] Further, a chain transmission mechanism is arranged at the right end of the box body, the chain transmission mechanism comprises an air motor, a driving sprocket, a driven sprocket, a chain and a fourth air inlet pipe, the air motor is fixedly arranged on the right outer wall of the box body, the driving sprocket is fixedly arranged on the output shaft of the air motor, one end of the fourth air inlet pipe is connected to the air outlet of the air-driven exhaust fan, and the other end of the fourth air inlet pipe is connected to the air inlet of the air motor, the driven sprocket is fixedly arranged at the right end center of the drum, and the chain is connected between the driving sprocket and the driven sprocket.

[0013] The present application has the following beneficial effects compared with the prior art:

[0014] 1. The device uses compressed air driving, reduces electric control equipment, and eliminates the hidden danger of explosion;

[0015] 2. The two-flow spraying mode (combination of airflow and water flow) is adopted, the water consumption is greatly reduced, the coal dust is wet dissolved by high atomization, the dust filtering effect is improved, and the water consumption is reduced by more than half under the same capacity compared with the existing wet dust removal fan.

[0016] 3. The full section of the filter screen is adopted, the filter screen is cleaned by the pressure wind, the dust removal effect is good, and the dust removal can reach more than 30 microns.

[0017] 4. The negative pressure ventilation of the working face is realized, and the coal dust backflow is eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further explained in detail in combination with the drawings:

[0019] Figure 1 It is the structure schematic diagram of the left direction of the utility model;

[0020] Figure 2 It is the structure schematic diagram of the positive direction of the utility model;

[0021] Figure 3 It is the structure schematic diagram of the right direction of the utility model;

[0022] Wherein, 1 is the box, 2 is the air inlet pipe, 3 is the air outlet pipe, 4 is the roller, 5 is the filter screen, 6 is the slag discharge hopper, 7 is the air-driven air extractor, 8 is the support sliding shoe, 9 is the slag discharge door, 10 is the scraper, 11 is the operating rod, 12 is the first air inlet pipe, 13 is the mixing box, 14 is the second air inlet pipe, 15 is the water inlet pipe, 16 is the spray pipe, 17 is the spray head, 18 is the dust blowing pipe, 19 is the transverse section, 20 is the longitudinal section, 21 is the third air inlet pipe, 22 is the pneumatic motor, 23 is the driving sprocket, 24 is the driven sprocket, 25 is the chain, 26 is the fourth air inlet pipe. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clear and obvious, the utility model is further explained in detail in combination with the embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model. The technical scheme of the utility model is explained in detail in combination with the embodiments and drawings, but the protection scope is not limited by this.

[0024] As shown in Figure 1 -3, the utility model provides a kind of negative pressure air extraction filter dust removal device for underground mining working face, including box 1, air inlet pipe 2 and air outlet pipe 3 are respectively arranged in the front and rear ends of box 1, spray mechanism is arranged in the inside front side of box 1, roller 4 is rotatably arranged in the inside rear side of box 1, a layer of filter screen 5 is wrapped outside roller 4, dust blowing mechanism is arranged in the inside of roller 4;Slag discharge hopper 6 is arranged in the lower end of box 1;Air-driven air extractor 7 is arranged in the inside of air outlet pipe 3.

[0025] The box 1 is a square cylindrical structure horizontally arranged along the front-back direction, a circular pipe-shaped air inlet pipe 2 is arranged at the front end opening of the box 1, and a circular cylindrical air outlet pipe 3 is arranged at the rear end opening of the box 1 through a pair of connecting flanges. Two left and right symmetrical support shoes 8 are fixedly arranged at the lower end surface of the box 1, and the whole device can be moved through the two support shoes 8.

[0026] The diameter of the air inlet pipe 2 is 600 mm, and the air inlet pipe 2 is connected with the air inlet pipe of the working face through an expansion air duct.

[0027] A square through hole is arranged on the bottom plate of the box 1, and the slag discharge hopper 6 is fixedly arranged at the square through hole; the slag discharge hopper 6 is a trapezoidal cylindrical structure with a wide upper end and a narrow lower end, the upper end and the left end of the slag discharge hopper 6 are both open, the upper end opening of the slag discharge hopper 6 is fixedly connected with the square through hole, and a openable slag discharge door 9 is rotatably arranged at the left end opening of the slag discharge hopper 6. A scraper 10 is slidably arranged in the slag discharge hopper 6, the scraper 10 is a trapezoidal plate structure, and the scraper 10 is in sliding contact with the inner bottom surface, the front inner wall and the rear inner wall of the slag discharge hopper 6; an operating rod 11 is fixedly arranged at the middle part of the left end of the scraper 10. When the slag discharge door 9 is opened, the operating rod 11 is held by hand, and the dust on the inner bottom surface, the front inner wall and the rear inner wall of the slag discharge hopper 6 is scraped outwards through the scraper 10, so that the inside of the slag discharge hopper 6 is cleaned.

[0028] The roller 4 is a circular cylindrical structure, the axis of the roller 4 is horizontally arranged along the left-right direction, and the middle parts of the left and right end surfaces of the roller 4 are rotatably connected with the left and right inner walls of the box 1 through bearing supports. A circular filter screen 5 is wrapped around the middle part of the outer side of the roller 4. A baffle is fixedly arranged on the top plate and the rear inner wall of the box 1, respectively, both baffles are inclined towards one side of the roller 4, and the airflow entering the inside of the box 1 smoothly passes through the filter screen 5 on the roller 4 and is finally discharged outwards from the air outlet pipe 3 through the two baffles.

[0029] The air-driven exhaust fan 7 is fixedly arranged in the air outlet pipe 3, and the blade rotating axis of the air-driven exhaust fan 7 coincides with the axis of the air outlet pipe 3. A first air inlet pipe 12 is arranged at the air inlet of the air-driven exhaust fan 7, and the first air inlet pipe 12 is in communication with the compressed air pipe in the underground. The compressed air pipe supplies compressed air into the air-driven exhaust fan 7 through the first air inlet pipe 12, so that the blades of the air-driven exhaust fan 7 start to rotate, a negative pressure is formed on the side of the air outlet pipe 3 away from the box 1, and the air outside the device with dust is introduced into the inside of the box 1, filtered through the filter screen 5 and discharged outwards from the air outlet pipe 3.

[0030] The spray mechanism includes a mixing box 13, a second air inlet pipe 14, a water inlet pipe 15, a spray head 17, and a spray pipe 16. The mixing box 13 is fixedly arranged on the top of the box body 1. One end of the second air inlet pipe 14 is connected with the inside of the mixing box 13, and the other end of the second air inlet pipe 14 is connected with the underground compressed air pipeline. The compressed air in the compressed air pipeline is introduced into the mixing box 13 through the second air inlet pipe 14. One end of the water inlet pipe 15 is connected with the inside of the mixing box 13, and the other end of the water inlet pipe 15 is connected with the underground water supply pipeline. The water in the water supply pipeline is introduced into the mixing box 13 through the water inlet pipe 15. Two rows of spray heads are fixedly arranged on the top plate at the front side in the box body 1. Each row includes three spray heads, and each spray head is connected with the inside of the mixing box 13 through a spray pipe 16. The compressed air and the water are mixed into water mist in the mixing box 13, and the water mist is sprayed downward from the spray heads into the box body 1 through the spray pipes 16.

[0031] The dust blowing mechanism includes a dust blowing pipe 18 and a third air inlet pipe 21. The dust blowing pipe 18 is an L-shaped pipe structure including a horizontal section 19 and a vertical section 20. The horizontal section 19 is arranged at the lower side in the drum 4 and is arranged horizontally along the left-right direction. A row of air outlets is arranged at the lower end of the horizontal section 19 and vertically downwardly faces the inside of the filter screen 5. The vertical section 20 is arranged along the radial direction of the drum 4 and is connected with the left end of the horizontal section 19. One end of the third air inlet pipe 21 is connected with the air outlet of the air-driven exhaust fan 7, and the other end of the third air inlet pipe 21 is connected with the end of the vertical section 20 of the dust blowing pipe 18 which is away from the horizontal section 19 and passes through the left side wall of the box body 1 and the left end center of the drum 4. The residual air of the air-driven exhaust fan 7 is introduced into the dust blowing pipe 18 through the second air inlet pipe 14 and is finally sprayed downward from the air outlets of the horizontal section 19 of the dust blowing pipe 18 to the inside of the filter screen 5. In this way, the dust adhered to the filter screen 5 is blown away from the filter screen 5 and falls into the slag discharging hopper 6.

[0032] A chain 25 transmission mechanism is arranged at the right end of the box 1, which comprises a pneumatic motor 22, a driving sprocket 23, a driven sprocket 24, a chain 25 and a fourth air inlet pipe 26. The pneumatic motor 22 is fixedly arranged on the right outer wall of the box 1, and the driving sprocket 23 is fixedly arranged on the output shaft of the pneumatic motor 22. One end of the fourth air inlet pipe 26 is connected with the air outlet of the air-driven exhaust fan 7, and the other end of the fourth air inlet pipe 26 is connected with the air inlet of the pneumatic motor 22. The driven sprocket 24 is fixedly arranged at the center of the right end of the drum 4, and the chain 25 is connected between the driving sprocket 23 and the driven sprocket 24. After the air-driven exhaust fan 7 works, the residual wind enters the pneumatic motor 22 through the fourth air inlet pipe 26, so as to drive the output shaft of the pneumatic motor 22 to rotate, and the pneumatic motor 22 drives the driving sprocket 23 to rotate, the driving sprocket 23 drives the driven sprocket 24 to rotate through the chain 25, and the driven sprocket 24 drives the drum 4 to rotate.

[0033] The air-driven exhaust fan adopts FQCNO5.0 air-driven exhaust fan, the air volume is 180M3 / min, the air pressure is 300Pa, the air supply pressure is 0.45MPa, the air consumption is 0.12m2 / s, and the rotating speed is 3000r / min.

[0034] The

[0035] The working principle of the utility model is as follows:

[0036] The compressed air is supplied into the air-driven exhaust fan 7 through the first air inlet pipe 12, so that the blades of the air-driven exhaust fan 7 start to rotate, the exhaust pipe 3 far from the one side of the box 1 forms a negative pressure, and thus the air with dust outside the device is introduced into the box 1. At the same time, the residual wind after the air-driven exhaust fan 7 works enters the pneumatic motor 22 through the fourth air inlet pipe 26, so as to drive the output shaft of the pneumatic motor 22 to rotate, the pneumatic motor 22 drives the driving sprocket 23 to rotate, the driving sprocket 23 drives the driven sprocket 24 to rotate through the chain 25, the driven sprocket 24 drives the drum 4 to rotate, and the drum 4 drives the filter screen 5 outside to rotate.

[0037] The air with dust first contacts the water mist sprayed by the spray head, after the water mist contacts the dust in the air, the dust starts to have water vapor and gather together. Then the air with dust contacts the filter screen 5 outside the drum 4 which rotates all the time, the filter screen 5 filters the air, and the dust with water vapor and gathered together starts to adhere to the filter screen 5, and the filtered air is discharged outward from the exhaust pipe 3.

[0038] When dust is adhered on the filter screen 5, the residual wind after the wind-driven blower 7 works enters into the dust blowing pipe 18 through the third air inlet pipe 21, and is finally sprayed downward from the air outlet of the transverse section 19 of the dust blowing pipe 18 to the inner side of the filter screen 5, so that the dust adhered on the filter screen 5 is blown away from the filter screen 5 and falls into the slag discharging hopper 6.

[0039] When the dust in the slag discharging hopper 6 accumulates to a certain degree, the slag discharging door 9 is opened, the hand-held operating rod 11 is held, and the slag on the bottom surface, the front inner wall and the rear inner wall in the slag discharging hopper 6 is scraped outwards through the scraper 10, so that the cleaning of the slag discharging hopper 6 is completed.

[0040] The dust removal device provided by the utility model can realize linkage control with the heading machine through the explosion-proof electromagnetic air valve.

[0041] It is apparent for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the utility model is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims should be included in the utility model. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A negative pressure suction filtration dust removal device for a downhole mining working face, characterized in that: The utility model provides a kind of dust removal device, including box (1), air inlet pipe (2) and exhaust pipe (3) are respectively arranged at the front and rear ends of box (1), spray mechanism is arranged at the inside front side of box (1), drum (4) is rotatably arranged at the inside rear side of box (1), drum (4) outside is wrapped with a layer of filter screen (5), blowing dust mechanism is arranged in drum (4) inside;Slag chute (6) is arranged at the lower end of box (1);Air-driven exhaust fan (7) is arranged in exhaust pipe (3) inside.

2. A negative pressure suction and filtration dust removal device for use in a mining face in a mine according to claim 1, characterized in that: The box (1) is a square cylindrical structure arranged horizontally along the front-rear direction, a circular tubular air inlet pipe (2) is arranged at the front opening of the box (1), and a circular cylindrical exhaust pipe (3) is arranged at the rear opening of the box (1) through a pair of connecting flanges; two left-right symmetrical support skates (8) are fixedly arranged at the lower end surface of the box (1).

3. A negative pressure suction and filtration dust removal device for use in a mining face in a mine according to claim 2, characterized in that: A square through hole is arranged on the bottom plate of the box (1), and the slag chute (6) is fixedly arranged at the square through hole; the slag chute (6) is a trapezoidal cylindrical structure with a wide upper end and a narrow lower end, the upper end and the left end of the slag chute (6) are both open, the upper end opening of the slag chute (6) is fixedly connected with the square through hole, and an openable slag door (9) is rotatably arranged at the left end opening of the slag chute (6); a scraper (10) is slidably arranged in the slag chute (6), the scraper (10) is a trapezoidal plate structure, and the scraper (10) is in sliding contact with the inner bottom surface, the front inner wall, and the rear inner wall of the slag chute (6); an operating rod (11) is fixedly arranged at the left end middle part of the scraper (10).

4. A negative pressure suction and filtration dust removal device for use in a mining face in a mine according to claim 2, characterized in that: The drum (4) is a circular cylindrical structure, and the left and right two side end surfaces of the drum (4) are rotatably connected with the left and right two side inner walls of the box (1) through bearing supports.

5. A negative pressure suction and filtration dust removal device for use in a mining face in a mine according to claim 2, characterized in that: The air-driven exhaust fan (7) is fixedly arranged in the exhaust pipe (3), and a first air inlet pipe (12) is arranged at the air inlet of the air-driven exhaust fan (7), the first air inlet pipe (12) is in communication with the underground compressed air pipeline.

6. A negative pressure suction and filtration dust removal device for use in a mining face in a mine according to claim 2, characterized in that: The spray mechanism includes a mixing box (13), a second air inlet pipe (14), a water inlet pipe (15), a spray head (17), and a spray pipe (16); the mixing box (13) is fixedly arranged on the top of the box (1), one end of the second air inlet pipe (14) is in communication with the inside of the mixing box (13), and the other end of the second air inlet pipe (14) is in communication with the underground compressed air pipeline; one end of the water inlet pipe (15) is in communication with the inside of the mixing box (13), and the other end of the water inlet pipe (15) is in communication with the underground water supply pipeline; two rows of spray heads are fixedly arranged on the top plate of the inside front side of the box (1), each row includes three spray heads, and each spray head is in communication with the inside of the mixing box (13) through a spray pipe (16).

7. A negative pressure suction and filtration dust removal device for use in a mining face underground according to claim 4, characterized in that: The dust blowing mechanism comprises a dust blowing pipe (18) and a third air inlet pipe (21). The dust blowing pipe (18) is an L-shaped tubular structure comprising a horizontal section (19) and a vertical section (20). The horizontal section (19) is arranged inside and at the lower side of the drum (4) and is horizontally arranged along the left-right direction. A row of air injection ports are arranged at the lower end of the horizontal section (19) and vertically downwardly face the inside of the filter screen (5). The vertical section (20) is arranged along the radial direction of the drum (4) and one end of the vertical section (20) is connected to the left end of the horizontal section (19). One end of the third air inlet pipe (21) is connected to the air outlet of the air-driven air extractor (7) and the other end of the third air inlet pipe (21) is connected to the end of the vertical section (20) of the dust blowing pipe (18) which is away from the horizontal section (19) and passes through the left side wall of the box (1) and the left end center of the drum (4).

8. A negative pressure suction and filtration dust removal device for use in a mining face underground according to claim 4, characterized in that: A chain (25) transmission mechanism is arranged at the right end of the box (1) and comprises an air motor (22), a driving sprocket (23), a driven sprocket (24), a chain (25) and a fourth air inlet pipe (26). The air motor (22) is fixedly arranged on the right outer wall of the box (1) and the output shaft of the air motor (22) is fixedly arranged with the driving sprocket (23). One end of the fourth air inlet pipe (26) is connected to the air outlet of the air-driven air extractor (7) and the other end of the fourth air inlet pipe (26) is connected to the air inlet of the air motor (22). The driven sprocket (24) is fixedly arranged at the right end center of the drum (4) and the chain (25) is connected between the driving sprocket (23) and the driven sprocket (24).

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