Automatic gas discharging device for coal mining

Abstract

The invention belongs to the technical field of gas safety equipment, and particularly relates to an automatic gas discharging device for coal mining, which comprises a mounting plate, electric wheels are mounted at four corners of the lower surface of the mounting plate, a rotating cylinder penetrating through two sides of the middle of a fixed block is rotatably mounted in the middle of the fixed block, and a communicated bent cylinder is fixed on the surface of one end of the rotating cylinder. The ends, away from the fixing blocks, of the fixing rods are located on the outer sides of the bending barrels, a fixing ring is jointly fixed to the ends, away from the fixing blocks, of the fixing rods, a plurality of gas sensors are installed on the outer ring face of the fixing ring in the circumferential direction at intervals, and an induced draft fan is installed in the middle of the interior of the rotating barrel. And meanwhile, gas at different positions in the coal mining roadway can be conveniently discharged, and the safety of mine engineering operation is improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas installation equipment, in particular to an automatic gas discharge device for coal mining. Background Art

[0002] Coal mining refers to a series of operations to extract coal resources from underground or open-pit mines. During the coal mining process, coal mining tunnels will contain gas. Gas is an unconventional natural gas produced from coal seams with methane as the main component. Gas can be used as fuel for internal combustion engine power generation, civil heating, etc.

[0003] When underground coal mining is carried out through coal mining tunnels, the gas contained in the coal mining tunnels will be released during the mining process. If not handled properly, it may cause serious safety accidents such as gas explosions, and will also have a certain impact on the atmospheric environment. When discharging the gas in the coal mining tunnels, it is necessary to use an emission device to discharge the gas in the coal mining tunnels.

[0004] However, when the existing discharge device is used, it is not possible to detect whether different positions in the coal mining tunnel contain gas, and it is not possible to conveniently discharge the gas at different positions in the coal mining tunnel, which affects the safety of mining engineering operations.

[0005] For this reason, we propose a gas automatic discharge device for coal mining. Summary of the invention

[0006] In view of the above-mentioned problems and / or the problems existing in the existing automatic gas discharge device for coal mining, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to provide an automatic gas emission device for coal mining. By improving the existing emission device, it can solve the problem that the existing emission device in the prior art mentioned above cannot detect whether different positions in the coal mining tunnel contain gas when used, and cannot conveniently discharge the gas at different positions in the coal mining tunnel, thereby affecting the safety of mining engineering operations.

[0008] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions: A gas automatic discharge device for coal mining comprises a mounting plate, wherein the four corners of the lower surface of the mounting plate are each provided with an electric wheel, a fixed block is fixed in the middle of the upper surface of the mounting plate, a rotating cylinder penetrating both sides of the middle of the fixed block is rotatably mounted in the middle of the fixed block, a connected bending cylinder is fixed to the surface of one end of the rotating cylinder, a fixing rod is fixed in the middle of both ends of the surface of one side of the fixed block close to the bending cylinder, a fixing ring is fixed to the end of the fixing rod away from the fixing block and located on the outside of the bending cylinder, a plurality of gas sensors are installed at intervals along the circumferential direction on the outer ring surface of the fixing ring, an induced draft fan is installed in the middle of the rotating cylinder, and the air outlet direction of the induced draft fan is toward the end away from the bending cylinder.

[0009] As a preferred solution of the automatic gas emission device for coal mining described in the present invention, the middle part of the outer ring surface of the rotating cylinder is rotatably connected with the middle part of the fixed block through a bearing, a PLC controller is installed on the middle part of the upper surface of the mounting plate located on the side of the fixed block close to the fixed ring, the gas sensors are electrically connected to the PLC controller, the PLC controller is electrically connected to the induced draft fan, an outer gear ring is installed on the outer side of the outer ring surface of the rotating cylinder away from one end of the bending cylinder, a rotating motor is installed on the middle part of the upper surface of the mounting plate away from one end of the bending cylinder, the mounting plate can fix and limit the rotating motor, the output shaft of the rotating motor faces the fixed block, and a matching meshing gear is installed on the outer ring surface of the output shaft of the rotating motor corresponding to the outer gear ring, and the rotating motor and the PLC controller are electrically connected.

[0010] As a preferred solution of the automatic gas emission device for coal mining described in the present invention, a temperature sensor is installed at one end of the bottom of the inner ring surface of the rotating cylinder away from the bending cylinder, and the temperature sensor is electrically connected to the PLC controller. A mounting ring is fixed at one end of the inner ring surface of the rotating cylinder away from the temperature sensor, and the rotating cylinder can fix and limit the mounting ring. A number of refrigeration rods are installed at intervals on the inner side of the mounting ring along the vertical direction, and the refrigeration rods are electrically connected to the PLC controller.

[0011] As a preferred embodiment of the automatic gas emission device for coal mining described in the present invention, connecting rods are fixed to the middle parts of the four sides of the induced draft fan, and the ends of the connecting rods away from the induced draft fan are fixedly connected to the corresponding positions on the inner ring surface of the rotating cylinder, the end of the bending cylinder away from the rotating cylinder faces upward, and a connecting ring is fixed to the surface of the end of the bending cylinder away from the rotating cylinder, the inner side of the connecting ring is connected to the inner side of the bending cylinder, and a porous filter screen is fixed to the inner side of the connecting ring, which can shield and protect the inner side of the connecting ring.

[0012] As a preferred solution of the automatic gas discharge device for coal mining described in the present invention, a hydraulic cylinder is installed in the middle of the upper end of the surface of the fixed block away from the bending cylinder, and the fixed block can fix and limit the hydraulic cylinder. The hydraulic cylinder is in a horizontal state, and the output rod of the hydraulic cylinder faces the fixed block, and the output rod of the hydraulic cylinder passes through the two side surfaces of the corresponding position on the fixed block.

[0013] As a preferred solution of the automatic gas discharge device for coal mining described in the present invention, a first movable plate is fixed to one end of the output rod of the hydraulic cylinder close to the bending cylinder, the hydraulic cylinder can drive the first movable plate to move, the first movable plate is in a vertical state, and a second movable plate is fixed to the bottom of the surface of the first movable plate away from the fixed block.

[0014] As a preferred solution of the automatic gas discharge device for coal mining described in the present invention, the second movable plate is in a horizontal state, a plurality of brushes are fixed at intervals on the lower surface of the second movable plate, the second movable plate can drive the brushes to move, the brushes are all in a vertical state, and the upper side of the second movable plate is in an arc state.

[0015] As a preferred solution of the automatic gas emission device for coal mining described in the present invention, the upper side of the second movable plate is in a matching and fitting state with the corresponding position on the inner ring surface of the fixed ring, and the horizontal plane at the lower end of the brush is on the same horizontal plane as the horizontal plane at the upper surface of the porous filter screen, so the brush is convenient for cleaning the porous filter screen.

[0016] As a preferred solution of the automatic gas emission device for coal mining described in the present invention, limit rods are fixed at both ends of the surface of the second movable plate close to the fixed block, the limit rods penetrate the two side surfaces of the corresponding positions on the fixed block, and matching limit holes are opened on the fixed block corresponding to the limit rods. The limit holes and the limit rods help to limit the second movable plate.

[0017] As a preferred embodiment of the automatic gas emission device for coal mining described in the present invention, a connecting bucket is fixed on the surface of one end of the rotating cylinder away from the bending cylinder, and the rotating cylinder can fix and limit the connecting bucket. A connecting pipe is fixed on the surface of one end of the connecting bucket away from the rotating cylinder, and the end of the connecting pipe away from the connecting bucket is installed between the exhaust pipe outside.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. In the present invention, when the rotating cylinder rotates, it can drive the bending cylinder to rotate. The induced draft fan can extract external gas through the rotating cylinder and the bending cylinder, and can conveniently discharge gas at different positions in the coal mining tunnel, thereby improving the safety of mining engineering operations.

[0019] 2. In the present invention, the porous filter plate can filter the dust and impurities carried in the passing gas, which is helpful for discharging the gas. The mounting ring can fix and limit the refrigeration rod, which is helpful for the stable use of the refrigeration rod. When the refrigeration rod is open, the refrigeration rod will cool the passing gas to ensure that the discharged gas is in a low temperature state, avoiding the danger caused by high gas temperature.

[0020] 3. In the present invention, when the second movable plate moves, it can drive the limiting rod to move along the limiting hole on the fixed block. The fixed block can limit the second movable plate through the limiting hole and the limiting rod, so as to facilitate the stable movement of the second movable plate. When the second movable plate moves, it can drive the brush to move. The brush can clean the dust, impurities or dirt filtered on the porous filter plate, which is helpful for the use of the porous filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the outer gear ring of the present invention; Figure 3 It is a schematic diagram of the fixing ring structure of the present invention; Figure 4 It is a schematic diagram of the bending tube structure of the present invention; Figure 5 It is a schematic diagram of the connecting rod structure of the present invention; Figure 6 It is a schematic diagram of the limit rod structure of the present invention; Figure 7 It is a schematic structural diagram of the second movable plate of the present invention; Figure 8 It is a schematic diagram of the fixing rod structure of the present invention.

[0022] In the figure: 1. mounting plate; 2. electric wheel; 3. fixing block; 4. rotating motor; 5. gear; 6. outer gear ring; 7. rotating cylinder; 8. connecting bucket; 9. connecting pipe; 10. bending cylinder; 11. connecting ring; 12. porous filter screen; 13. fixing rod; 14. fixing ring; 15. gas sensor; 16. PLC controller; 17. connecting rod; 18. induced draft fan; 19. mounting ring; 20. refrigeration rod; 21. temperature sensor; 22. hydraulic cylinder; 23. first movable plate; 24. second movable plate; 25. brush; 26. limit rod; 27. limit hole. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] The present invention provides an automatic gas discharge device for coal mining, which can detect whether different positions in a coal mining tunnel contain gas, and can conveniently discharge gas at different positions in the coal mining tunnel, thereby improving the safety of mining engineering operations; See also Figure 1-8 A gas automatic discharge device for coal mining, comprising a mounting plate 1, electric wheels 2 are mounted at the four corners of the lower surface of the mounting plate 1, a fixed block 3 is fixed in the middle of the upper surface of the mounting plate 1, a rotating cylinder 7 penetrating both sides of the middle of the fixed block 3 is rotatably mounted in the middle of the fixed block 3, a connected bending cylinder 10 is fixed to one end surface of the rotating cylinder 7, a fixed rod 13 is fixed in the middle of both ends of the surface of the fixed block 3 close to the bending cylinder 10, an end of the fixed rod 13 away from the fixed block 3 is located on the outside of the bending cylinder 10 and is fixed with a fixed ring 14, the outer surface of the fixed ring 14 A number of gas sensors 15 are installed at intervals along the circumferential direction of the annular surface, and an induced draft fan 18 is installed in the middle of the rotating cylinder 7. The air outlet direction of the induced draft fan 18 is toward the end away from the bending cylinder 10. When the rotating cylinder 7 rotates, it can drive the bending cylinder 10 to rotate. The induced draft fan 18 can extract external gas through the rotating cylinder 7 and the bending cylinder 10. When used, it helps the discharge device to detect whether different positions in the coal mining tunnel contain gas, and can conveniently discharge gas at different positions in the coal mining tunnel, thereby improving the safety of mining engineering operations.

[0025] Among them, the middle part of the outer ring surface of the rotating cylinder 7 is rotatably connected to the middle part of the fixed block 3 through a bearing, the middle part of the upper surface of the mounting plate 1 is located on the side of the fixed block 3 close to the fixed ring 14 and is equipped with a PLC controller 16, the gas sensors 15 are electrically connected to the PLC controller 16, and the PLC controller 16 is electrically connected to the induced draft fan 18, an outer gear ring 6 is installed on the outer side of the outer ring surface of the rotating cylinder 7 away from the end of the bending cylinder 10, a rotating motor 4 is installed in the middle part of the upper surface of the mounting plate 1 away from the end of the bending cylinder 10, the mounting plate 1 can fix and limit the rotating motor 4, and the output shaft of the rotating motor 4 is facing the fixed Block 3, a matching meshing gear 5 is installed on the outer ring surface of the output shaft of the rotating motor 4 corresponding to the outer gear ring 6, and the rotating motor 4 is electrically connected to the PLC controller 16; a temperature sensor 21 is installed at the end of the bottom of the inner ring surface of the rotating cylinder 7 away from the bending cylinder 10, and the temperature sensor 21 is electrically connected to the PLC controller 16, and a mounting ring 19 is fixed at the end of the inner ring surface of the rotating cylinder 7 away from the temperature sensor 21, and the rotating cylinder 7 can fix and limit the mounting ring 19, and a plurality of refrigeration rods 20 are installed on the inner side of the mounting ring 19 at intervals along the vertical direction, and the refrigeration rods 20 are electrically connected to the PLC controller 16.

[0026] A connecting rod 17 is fixed to the middle of the surface of the four sides of the induced draft fan 18, and the end of the connecting rod 17 away from the induced draft fan 18 is fixedly connected to the corresponding position on the inner ring surface of the rotating cylinder 7. The end of the bending cylinder 10 away from the rotating cylinder 7 faces upward, and a connecting ring 11 is fixed to the surface of the end of the bending cylinder 10 away from the rotating cylinder 7. The inner side of the connecting ring 11 is connected to the inner side of the bending cylinder 10. A porous filter plate 12 is fixed to the inner side of the connecting ring 11, and the porous filter plate 12 can shield and protect the inner side of the connecting ring 11; a hydraulic cylinder 22 is installed in the middle of the upper end of the surface of the side of the fixed block 3 away from the bending cylinder 10, and the fixed block 3 can fix and limit the hydraulic cylinder 22. The hydraulic cylinder 22 is in a horizontal state, and the output rod of the hydraulic cylinder 22 faces the fixed block 3, and the output rod of the hydraulic cylinder 22 passes through the two side surfaces of the corresponding position on the fixed block 3.

[0027] A first movable plate 23 is fixed to one end of the output rod of the hydraulic cylinder 22 close to the bending cylinder 10, and the hydraulic cylinder 22 can drive the first movable plate 23 to move, and the first movable plate 23 is in a vertical state, and a second movable plate 24 is fixed to the bottom of the surface of the first movable plate 23 away from the fixed block 3; the second movable plate 24 is in a horizontal state, and a plurality of brushes 25 are fixed at intervals on the lower surface of the second movable plate 24, and the second movable plate 24 can drive the brushes 25 to move, and the brushes 25 are all in a vertical state, and the upper side of the second movable plate 24 is in an arc state; the upper side of the second movable plate 24 is in a matching and fitting state with the corresponding position on the inner ring surface of the fixing ring 14, and the horizontal plane at the lower end of the brush 25 is located at the same horizontal plane as the horizontal plane at the upper surface of the porous filter screen plate 12, and the brush 25 is convenient for cleaning the porous filter screen plate 12.

[0028] Limiting rods 26 are fixed at both ends of the surface of one side of the second movable plate 24 close to the fixed block 3. The limiting rods 26 penetrate the two side surfaces of the corresponding positions on the fixed block 3. Matching limiting holes 27 are opened on the fixed block 3 corresponding to the limiting rods 26. The limiting holes 27 and the limiting rods 26 help to limit the second movable plate 24; a connected connecting bucket 8 is fixed to the surface of the end of the rotating cylinder 7 away from the bending cylinder 10, and the rotating cylinder 7 can fix and limit the connecting bucket 8. A connected connecting pipe 9 is fixed to the surface of the end of the connecting bucket 8 away from the rotating cylinder 7, and the end of the connecting pipe 9 away from the connecting bucket 8 is installed between the exhaust pipe outside.

[0029] Working principle of the present invention: During use, the electric wheel 2 is placed at the position in the coal mining tunnel where gas needs to be discharged. The electric wheel 2 can support and limit the mounting plate 1 and the various components assembled on the mounting plate 1, which is helpful for stably using the mounting plate 1 and the various components assembled on the mounting plate 1. The mounting plate 1 can support and limit the fixing block 3 and the various components assembled on the fixing block 3, which is convenient for stably using the fixing block 3 and the various components assembled on the fixing block 3, and install the connecting pipe 9 away from the end of the connecting bucket 8 and the external discharge pipe, and further open the electric wheel 2. When the electric wheel 2 is opened, the electric wheel 2 will drive the mounting plate 1 and the various components assembled on the mounting plate 1 to move along the coal mining tunnel, which is helpful for making the discharge device correspond to different positions in the coal mining tunnel.

[0030] The gas sensor 15 on the fixed ring 14 is turned on. When the gas sensor 15 is turned on, the gas sensor 15 can detect whether there is gas at different angles outside the fixed ring 14. When the discharge device moves, it can drive the fixed ring 14 and the gas sensor 15 to move to different positions in the coal mining tunnel, so that the gas sensor 15 can detect whether there is gas at different positions in the coal mining tunnel. When the gas sensor 15 detects the presence of gas, the gas sensor 15 can transmit the detected data information to the PLC controller 16, and the PLC controller 16 will turn on the rotating motor 4, and the mounting plate 1 can fix and limit the rotating motor 4.

[0031] When the rotating motor 4 is turned on, the output shaft of the rotating motor 4 can drive the gear 5 to rotate. When the gear 5 rotates, it can drive the matching meshing outer gear ring 6 to rotate. When the outer gear ring 6 rotates, it can drive the rotating cylinder 7 to rotate. When the rotating cylinder 7 rotates, it will rotate along the fixed block 3. The fixed block 3 can limit the rotating cylinder 7 to facilitate the stable rotation of the rotating cylinder 7. When the rotating cylinder 7 rotates, it can drive the bending cylinder 10 to rotate. When the bending cylinder 10 rotates, it can drive the connecting ring 11 and the porous filter screen 12 to rotate, so that the connecting ring 11 and the porous filter screen 12 rotate toward the gas sensor 15 that detects gas. The PLC controller 16 will turn on the induced draft fan 18 on the connecting rod 17. The rotating cylinder 7 can fix and limit the connecting rod 17, which is conducive to the stable use of the connecting rod 17. The connecting rod 17 can fix and limit the induced draft fan 18.

[0032] When the induced draft fan 18 is turned on, the induced draft fan 18 will extract the gas in the external coal mining tunnel through the rotating cylinder 7, the bending cylinder 10, the connecting ring 11 and the porous filter screen 12, so that the gas in the external coal mining tunnel enters the rotating cylinder 7 through the porous filter screen 12, the connecting ring 11 and the bending cylinder 10, and the gas in the rotating cylinder 7 is discharged to the external installed discharge pipe through the connecting bucket 8 and the connecting pipe 9 to discharge the gas. The porous filter screen 12 can filter the dust and impurities carried by the passing gas, which is helpful for discharging the gas. The temperature sensor 21 in the rotating cylinder 7 is turned on. When the temperature sensor 21 is turned on, the temperature sensor 21 can detect the temperature of the passing gas. When the temperature sensor 21 detects that the temperature of the passing gas is higher than 50°C, the PLC controller 16 will open the refrigeration rod 20 on the mounting ring 19. The mounting ring 19 can fix and limit the refrigeration rod 20. When the refrigeration rod 20 is turned on, the refrigeration rod 20 will cool down the passing gas to ensure that the discharged gas is in a low temperature state to avoid the danger caused by high gas temperature.

[0033] When it is necessary to clean the dust or impurities filtered on the porous filter plate 12, the connecting ring 11 on the bending cylinder 10 and the porous filter plate 12 are rotated upward, and the hydraulic cylinder 22 on the fixing block 3 is further opened. The fixing block 3 can fix and limit the hydraulic cylinder 22. When the hydraulic cylinder 22 is opened, the output rod of the hydraulic cylinder 22 can drive the first movable plate 23 to move toward the fixing ring 14. When the first movable plate 23 moves, it can drive the second movable plate 24 to move. When the movable plate 24 moves, it can drive the limiting rod 26 to move along the limiting hole 27 on the fixed block 3. The fixed block 3 can limit the second movable plate 24 through the limiting hole 27 and the limiting rod 26, so as to facilitate the stable movement of the second movable plate 24. When the second movable plate 24 moves, it can drive the brush 25 to move. When the second movable plate 24 moves horizontally along the upper side of the porous filter mesh plate 12, the brush 25 can clean the dust, impurities or dirt filtered on the porous filter mesh plate 12.

[0034] During use, the discharge device helps to detect whether different locations in the coal mining tunnel contain gas, and can conveniently discharge gas from different locations in the coal mining tunnel, thereby improving the safety of mining engineering operations.

[0035] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An automatic gas discharge device for coal mining, comprising a mounting plate (1), characterized in that: Electric wheels (2) are mounted on the four corners of the lower surface of the mounting plate (1); a fixed block (3) is fixed in the middle of the upper surface of the mounting plate (1); a rotating cylinder (7) penetrating both sides of the middle of the fixed block (3) is rotatably mounted in the middle of the fixed block (3); a connected bending cylinder (10) is fixed to one end surface of the rotating cylinder (7); fixed rods (13) are fixed in the middle of both ends of the surface of the fixed block (3) close to the bending cylinder (10); an end of the fixed rod (13) away from the fixed block (3) is located outside the bending cylinder (10) and is fixed with a fixed ring (14); a plurality of gas sensors (15) are mounted at intervals along the circumferential direction on the outer ring surface of the fixed ring (14); an induced draft fan (18) is mounted in the middle of the rotating cylinder (7); the air outlet direction of the induced draft fan (18) is toward the end away from the bending cylinder (10).

2. The automatic gas discharge device for coal mining according to claim 1, characterized in that: The middle portion of the outer ring surface of the rotating cylinder (7) is rotatably connected to the middle portion of the fixed block (3) via a bearing. A PLC controller (16) is installed in the middle portion of the upper surface of the mounting plate (1) on a side of the fixed block (3) close to the fixed ring (14). The gas sensors (15) are electrically connected to the PLC controller (16). The PLC controller (16) is electrically connected to the induced draft fan (18). An outer toothed ring (6) is installed on the outer side of the outer ring surface of the rotating cylinder (7) away from the end of the bending cylinder (10). A rotating motor (4) is installed in the middle portion of the upper surface of the mounting plate (1) away from the end of the bending cylinder (10). The output shaft of the rotating motor (4) faces the fixed block (3). A matching meshing gear (5) is installed on the outer ring surface of the output shaft of the rotating motor (4) corresponding to the outer toothed ring (6). The rotating motor (4) is electrically connected to the PLC controller (16).

3. The automatic gas discharge device for coal mining according to claim 2, characterized in that: A temperature sensor (21) is installed at one end of the bottom of the inner ring surface of the rotating cylinder (7) away from the bending cylinder (10), and the temperature sensor (21) is electrically connected to the PLC controller (16). A mounting ring (19) is fixed to one end of the inner ring surface of the rotating cylinder (7) away from the temperature sensor (21), and a plurality of refrigeration rods (20) are installed at intervals along the vertical direction on the inner side of the mounting ring (19), and the refrigeration rods (20) are all electrically connected to the PLC controller (16).

4. The automatic gas discharge device for coal mining according to claim 3, characterized in that: Connecting rods (17) are fixed to the middle of the surfaces of the four sides of the induced draft fan (18); the ends of the connecting rods (17) away from the induced draft fan (18) are fixedly connected to corresponding positions on the inner annular surface of the rotating cylinder (7); the end of the bending cylinder (10) away from the rotating cylinder (7) faces upward; a connecting ring (11) is fixed to the surface of the end of the bending cylinder (10) away from the rotating cylinder (7); the inner side of the connecting ring (11) is in communication with the inner side of the bending cylinder (10); and a porous filter screen (12) is fixed to the inner side of the connecting ring (11).

5. The automatic gas discharge device for coal mining according to claim 4, characterized in that: A hydraulic cylinder (22) is installed at the middle of the upper end of the surface of the fixed block (3) away from the bending cylinder (10), the hydraulic cylinder (22) is in a horizontal state, the output rod of the hydraulic cylinder (22) faces the fixed block (3), and the output rod of the hydraulic cylinder (22) penetrates the two side surfaces at corresponding positions on the fixed block (3).

6. The automatic gas discharge device for coal mining according to claim 5, characterized in that: A first movable plate (23) is fixed to one end of the output rod of the hydraulic cylinder (22) close to the bending cylinder (10), the first movable plate (23) is in a vertical state, and a second movable plate (24) is fixed to the bottom of the surface of the first movable plate (23) away from the fixed block (3).

7. The automatic gas discharge device for coal mining according to claim 6, characterized in that: The second movable plate (24) is in a horizontal state, a plurality of brushes (25) are fixed at intervals on the lower surface of the second movable plate (24), the brushes (25) are all in a vertical state, and the upper side of the second movable plate (24) is in an arcuate state.

8. The automatic gas discharge device for coal mining according to claim 7, characterized in that: The upper side of the second movable plate (24) and the corresponding position on the inner ring surface of the fixed ring (14) are in a matching and fitting state, and the horizontal plane at the lower end of the brush (25) is located at the same level as the horizontal plane at the upper surface of the porous filter screen plate (12).

9. The automatic gas discharge device for coal mining according to claim 8, characterized in that: Limit rods (26) are fixed at both ends of the surface of one side of the second movable plate (24) close to the fixed block (3), the limit rods (26) penetrate both side surfaces at corresponding positions on the fixed block (3), and matching limit holes (27) are provided on the fixed block (3) corresponding to the limit rods (26).

10. The automatic gas discharge device for coal mining according to claim 9, characterized in that: A connecting bucket (8) is fixed to the surface of one end of the rotating cylinder (7) away from the bending cylinder (10), a connecting pipe (9) is fixed to the surface of one end of the connecting bucket (8) away from the rotating cylinder (7), and an end of the connecting pipe (9) away from the connecting bucket (8) is installed between an exhaust pipe outside.

Images