Ventilation device for coal mine driving working face

Abstract

The invention discloses a ventilation device for a coal mine driving working face in the technical field of ventilation devices. The ventilation device comprises a shell, a fan rotationally connected to the interior of the shell, a filter screen located in the shell and a connecting pipe located on one side of the shell, and a socket end is arranged on the left side of the connecting pipe; under the condition that a tunneling face is gradually advanced, the connecting pipe and the shell are conveniently mounted and dismounted, the shell can be located at the position close to the tunneling face, broken dust can be conveniently adsorbed and filtered in the tunneling process, lifting is not needed when the connecting pipe and the shell are mounted and dismounted, and the working efficiency is improved. And the pipeline connection can reduce the connection difficulty and improve the connection safety through a mechanical connection means.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation devices, and in particular to a ventilation device used for a coal mine excavation working face. Background Art

[0002] During the excavation process of coal mines, the deposited ore body needs to be broken up by a drill bit to facilitate the transportation of the coal mines; therefore, the excavation operation on the excavation working face is accompanied by crushing; during the excavation process, the working face will be filled with dust and the working environment will be harsh; for this reason, a ventilation device with a filtration system will be installed on the excavation working face to improve the working environment.

[0003] However, as excavation progresses, the actual working face is constantly advancing, which means that the power system of the ventilation device needs to repeatedly dismantle the pipes connected to it to add new connecting pipes, so that the power system is always close to the working face; at the same time, in the traditional disassembly and assembly process, it is usually necessary to clean the filter components, so it is necessary to manually lift the power system from the bottom side in order to remove the power system from the supporting truss. On the one hand, the labor intensity of the dismantling personnel is high, and on the other hand, the dust particles accumulated in the filter unit in the power system are also easy to fall on the face of the dismantling personnel. Summary of the invention

[0004] The object of the present invention is to provide a ventilation device for a coal mine excavation working face to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ventilation device for a coal mine excavation working face, comprising a shell, a fan rotatably connected to the inside of the shell, a filter screen located inside the shell and a connecting pipe located on one side of the shell, a socket end is provided on the left side of the connecting pipe, a positioning ring is fixedly connected to the inner wall of the right side of the connecting pipe, a retaining ring is provided on the left side of the positioning ring, a clamping ring is provided between the retaining ring and the positioning ring, the clamping ring can move left and right between the retaining ring and the positioning ring, a plurality of groups of teeth are fixedly connected to the inner wall of the clamping ring, the clamping ring is fixedly connected to a plastic ring, an access end is provided at the left end of the shell, the access end can be inserted into the inside of the plastic ring and the clamping ring from the right side, a frame is provided inside the shell, the filter screen is rotatably connected to the inside of the frame, A rotating group is provided on one side of the filter, and the rotating group is used to tilt the filter after the filter moves to the right side of the shell. First rack rods are provided on the front and rear sides of the frame, and the frame can move with the first rack rod. The first rack rods are slidably connected to the inner wall of the shell in the left and right directions. The two first rack rods are meshed with gears, and the two gears are rotatably connected to the inner wall of the shell. The two gears are meshed with second rack rods on the side away from the first rack rod. The two second rack rods are slidably connected to the shell and the left ends of the two second rack rods are located outside the shell. The two second rack rods are fixedly connected to the shell with a first spring, and the left sides of the two second rack rods are provided with a clamp, and the clamp is rotatably connected to the side wall of the shell.

[0006] As a further solution of the present invention, the rotating group includes a retaining rod, a slide groove and a torsion spring. The slide groove is opened on the inner wall of the shell, and the slide groove is located on the left side of the frame. A second spring is fixedly connected between the retaining rod and the inner wall of the slide groove. The torsion spring is arranged on one side of the filter rotation axis. The torsion spring is used to rotate the filter after the retaining rod is separated from the filter.

[0007] As a further solution of the present invention, the rotating shafts on the left and right sides of the filter are rectangular, and the rotating shafts of the filter are slidably connected with connecting heads, and the connecting heads are rotatably connected to the inner walls of the frame. The torsion springs are sleeved on the rotating shafts of the connecting heads, and the side walls of the connecting heads are slidably connected with limiting heads, and a third spring is fixedly connected between the limiting head and the connecting head.

[0008] As a further solution of the present invention, a driving rod is slidably connected to the first rack rod, and a driving wheel and a transmission wheel that are meshed with each other are rotatably connected to the driving rod. An incomplete toothed disc is fixedly connected to the transmission wheel, and a third rack rod is meshed with the incomplete toothed disc. The third rack rod is slidably connected to the driving rod, and a fourth spring is fixedly connected between the third rack rod and the driving rod. A driving group is provided on one side of the driving rod, and the driving group is used to make the driving rod move away from or closer to the inner wall of the shell when the first rack rod moves left and right.

[0009] As a further solution of the present invention, the access end is slidably connected to the shell, and the end of the access end extends into the interior of the shell. The driving group includes an extension rod and a fifth spring. The extension rod is slidably connected to the side wall of the shell in the front-to-back direction, and the outside of the extension rod is slidably connected to the driving rod in the left-to-right direction. The fifth spring is fixedly connected between the driving rod and the first rack rod. When the access end slides left and right inside the shell, it will contact or disengage from the side wall of the extension rod, and the side wall of the extension rod is provided with an inclined surface.

[0010] As a further solution of the present invention, a roller is rotatably connected to the retaining rod.

[0011] As a further solution of the present invention, the two first rack rods are each provided with a limiting groove, the two ends of the frame are respectively slidably connected to the two limiting grooves, and a sixth spring is fixedly connected between the two limiting grooves and the left and right sides of the inner wall of the frame.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention facilitates the installation and disassembly of the connecting pipe and the shell when the excavation face gradually advances, facilitates the shell to be located close to the excavation face, facilitates the adsorption and filtration of dust generated by crushing during the excavation process, and does not require lifting during the installation and disassembly of the connecting pipe and the shell. The mechanical connection of the pipeline can reduce the difficulty of connection and improve the safety during connection.

[0013] When the filter and the frame move to the right side of the shell, the filter can automatically tilt to facilitate the separation of dust and impurities attached to the top from the filter, and facilitate subsequent manual cleaning. The filter and the frame first slide horizontally along the inside of the shell, and will not tilt until the frame and the filter move to the outside of the shell. When the frame moves to the right, the accumulated dust on the right side of the filter inside the shell is pushed out, and the dust that falls when the filter is tilted later can be prevented from falling into the shell and then being sucked into the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the access end and the connecting rod of the present invention; Figure 3 for Figure 2 A partial enlarged view of the middle A; Figure 4 It is a schematic diagram of the positional relationship between the housing, the second rack rod and the clamping member of the present invention; Figure 5 for Figure 4 A partial enlarged view of point B in the middle; Figure 6 It is a schematic diagram of the internal structure of the housing of the present invention; Figure 7 It is a schematic diagram of the positional relationship between the housing and the slide slot of the present invention; Figure 8 It is a schematic diagram of the connection relationship between the first rack rod, the second rack rod, the driving rod, the frame and the filter screen of the present invention; Fig. 9 It is a schematic diagram of the positional relationship between the first rack rod, the driving rod and the extension rod of the present invention; Fig.10 It is a schematic diagram of the positional relationship between the access end, the driving rod and the extension rod of the present invention; Fig.11 for Fig.10 A partial enlarged view of point C in the middle; Fig.12 It is a schematic diagram of the connection relationship between the frame, the connector and the sixth spring of the present invention; Fig.13 It is a schematic diagram of the connection relationship between the connector, the limit head, the torsion spring and the filter screen of the present invention.

[0015] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Shell; 2. Fan; 3. Filter; 4. Connecting pipe; 5. Socket end; 6. Positioning ring; 7. Retaining ring; 8. Snap ring; 9. Teeth; 10. Plastic ring; 11. Access end; 12. Frame; 13. First rack rod; 14. Gear; 15. Second rack rod; 16. First spring; 17. Clamp; 18. Retaining rod; 19. Slide groove; 20. Torsion spring; 21. Second spring; 22. Connecting head; 23. Limiting head; 24. Third spring; 25. Driving rod; 26. Driving wheel; 27. Transmission wheel; 28. Incomplete toothed disc; 29. ​​Third rack rod; 30. Fourth spring; 31. Extension rod; 32. Fifth spring; 33. Roller; 34. Sixth spring; 35. Limiting groove. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-Figure 13The present invention provides a technical solution: a ventilation device for a coal mine excavation working face, comprising a shell 1, a fan 2 rotatably connected to the inside of the shell 1, a filter screen 3 located inside the shell 1 and a connecting pipe 4 located on one side of the shell 1, a socket end 5 is arranged on the left side of the connecting pipe 4, a positioning ring 6 is fixedly connected to the inner wall of the right side of the connecting pipe 4, a retaining ring 7 is arranged on the left side of the positioning ring 6, a clamping ring 8 is arranged between the retaining ring 7 and the positioning ring 6, the clamping ring 8 can move left and right between the retaining ring 7 and the positioning ring 6, a plurality of groups of teeth 9 are fixedly connected to the inner wall of the clamping ring 8, a plastic ring 10 is fixedly connected to the clamping ring 8, an access end 11 is arranged on the left end of the shell 1, the access end 11 can be inserted into the inside of the plastic ring 10 and the clamping ring 8 from the right side, a frame 12 is arranged inside the shell 1, the filter screen 3 is rotatably connected to the inside of the frame 12, and a clamping ring 8 is arranged on one side of the filter screen 3. A rotating group is provided, and the rotating group is used to tilt the filter 3 after the filter 3 moves to the right side of the shell 1. First rack rods 13 are provided on the front and rear sides of the frame 12, and the frame 12 can move with the first rack rod 13. The first rack rods 13 are slidably connected to the inner wall of the shell 1 in the left and right directions. The two first rack rods 13 are meshed with gears 14, and the two gears 14 are rotatably connected to the inner wall of the shell 1. The two gears 14 are meshed with second rack rods 15 on the side away from the first rack rod 13. The two second rack rods 15 are slidably connected to the shell 1 and the left ends of the two second rack rods 15 are located outside the shell 1. First springs 16 are fixedly connected between the two second rack rods 15 and the shell 1, and clamps 17 are provided on the left sides of the two second rack rods 15, and the clamps 17 are rotatably connected to the side walls of the shell 1.

[0018] like Figure 1-Figure 9 As shown: During the coal mine excavation process, multiple frames for supporting the inner wall of the mine tunnel and support frames with tracks are laid inside the mine. The shell 1 is slidably connected to the track, and the access end 11 at the end of the shell 1 is connected to the connecting pipe 4. As the excavation depth increases, the shell 1 and the fan 2 need to be moved toward the excavation surface, and the access end 11 and the connecting pipe 4 need to be disassembled. After disassembly, the shell 1 is slid laterally along the track, and the new connecting pipe 4 is connected to the rear connecting pipe 4 to increase the length, and then the shell 1 is connected to the connecting pipe 4 at the latest excavation surface position; The connection between the housing 1 and the connecting pipe 4 is as follows: Insertion of the access end 11: Before the connection is made, the position of the connecting pipe 4 is fixed, and there will be a bracket to support it (not shown in the figure), and the shell 1 is located on the right side of the connecting pipe 4 and slides horizontally on the track; when docking, slide the shell 1 from the right to the left, so that the shell 1 approaches the connecting pipe 4, and the access end 11 will pass through the inside of the plastic ring 10 and move toward the inside of the connecting pipe 4. When the teeth 9 contact the access end 11, the snap ring 8 will be driven by the access end 11 to move toward the inside of the connecting pipe 4 (the movement of the snap ring 8 drives the plastic ring 10 to move synchronously), and the snap ring 8 will change from the state of contact with the positioning ring 6 to the state of disengagement. When the left side wall of the plastic ring 10 contacts the right side wall of the positioning ring 6, the plastic ring 10 and the snap ring 8 will stay at this position, and the access end 11 continues to be inserted, and the access end 11 passes over the teeth 9. When the access end 11 is blocked by the retaining ring 7 and cannot be inserted further, the insertion process of the access end 11 is completed, but the access end 11 is not locked at this time; Locking of the access end 11: After the access end 11 is inserted, the housing 1 and the access end 11 are pulled to the right. At this time, the housing 1 slides along the track, and when the access end 11 moves to the right, the plastic ring 10 and the snap ring 8 are also driven to move to the right. When the snap ring 8 moves to contact the positioning ring 6, the inclined side walls of the snap ring 8 and the positioning ring 6 will form a downward extrusion force, so that the teeth 9 can be pressed down toward the access end 11 to fix, thereby completing the self-locking fixation of the access end 11, so that the access end 11 cannot continue to move to the right. In actual use, a sealing ring can also be selectively provided on one side of the teeth 9. The sealing ring can improve the sealing effect of the connecting pipe 4 and the access end 11 (the sealing ring is not shown in the figure). At this time, the installation and fixation of the housing 1 and the connecting pipe 4 are completed; It should be noted that the left side of the connecting pipe 4 has a socket end 5, and the socket end 5 is the same size as the access end 11, so when two adjacent connecting pipes 4 are connected, they can be installed according to the above process; When the excavation is deepened, the housing 1 and the internal fan 2 need to be moved closer to the excavation surface to ensure the use effect, then the housing 1 and the left connecting pipe 4 need to be disassembled, and the dust attached to the surface of the filter 3 needs to be cleaned; Disassembly and cleanup work as follows: The first process: first rotate the two clamps 17 that restrict the left end of the second rack rod 15 to one side, and then the second rack rod 15 will slide to the left along the housing 1 under the elastic relaxation action of the first spring 16. When the second rack rod 15 contacts the plastic ring 10, it will push the plastic ring 10 and the snap ring 8 to move to the left. At this time, the snap ring 8 will move to the left relative to the positioning ring 6, and the downward pressure applied by the positioning ring 6 to the teeth 9 and the snap ring 8 will disappear. At this time, the teeth 9 will not lock the access end 11. When the snap ring 8 moves to contact the retaining ring 7, it will stay at this position, and the corresponding plastic ring 10 will also stop moving. At this time, the elastic force of the first spring 16 has not been completely released, and the plastic ring 10 will be pushed by the second rack rod 15 all the time, but the second rack rod 15 cannot move due to the plastic ring 10 blocking it, and the distance the second rack rod 15 moves to the left has not reached the limit position; The second rack bar 15 will mesh with the gear 14 during the process of moving to the left and drive the first rack bar 13 to slide to the right along the inner wall of the shell 1. At this time, the first rack bar 13 will drive the frame 12 to move a fixed length to the right from the inside of the shell 1. Then the shell 1 is manually pushed to slide to the right along the track. At this time, the second rack bar 15 will gradually slide to the left as the shell 1 moves to the right. During this process, the elasticity of the first spring 16 will gradually be released, and then the first rack bar 13 will continue to be pushed toward the right side of the shell 1, and the access end 11 will gradually disengage from the connecting pipe 4. After the access end 11 is completely disengaged from the connecting pipe 4, the elastic force of the first spring 16 will be completely released. , at this time, the second rack rod 15 and the first rack rod 13 will move to the extreme position, and the frame 12 and the filter screen 3 will also move completely to the outside of the shell 1, and will be a certain distance away from the right side of the shell 1, and then the rotating group will drive the filter screen 3 to rotate around the rotating axis to a state where the top end is tilted to the left, that is, when the filter screen 3 is not completely moved to the rightmost side, the rotating group will limit the filter screen 3 so that it will not tilt, and then the filter screen 3 can be cleaned, and at this time the shell 1 is also separated from the connecting pipe 4. At this time, it is necessary to continue to push the shell 1 to the right so that the distance between the shell 1 and the connecting pipe 4 can accommodate the new connecting pipe 4, connect the two connecting pipes 4, and then connect the shell 1 to the last connecting pipe 4; The technical solution is convenient for installing and disassembling the connecting pipe 4 and the shell 1 when the excavation face is gradually advanced, and it is convenient for the shell 1 to be at a distance close to the excavation face, so as to facilitate the adsorption and filtering of the broken dust during the excavation process. There is no need to lift the connecting pipe 4 and the shell 1 when installing and disassembling it. The pipeline connection can reduce the difficulty of connection and improve the safety during connection by means of mechanical connection. After the filter screen 3 and the frame 12 are moved to the right side of the shell 1, the filter screen 3 can be tilted, so that the dust and impurities attached to the top are separated from the filter screen 3, which is convenient for the subsequent manual cleaning of the filter screen 3. The filter screen 3 and the frame 12 first slide horizontally along the inside of the shell 1, and will not tilt until the frame 12 and the filter screen 3 move to the outside of the shell 1, so that when the frame 12 moves to the right, the accumulated dust on the right side of the filter screen 3 inside the shell 1 is pushed out, and the dust falling when the filter screen 3 is tilted can be prevented from falling into the shell 1 and then being sucked into the connecting pipe 4. Before connecting the housing 1 with the connecting pipe 4, the second rack rod 15 is manually pushed to the right, at which time the first spring 16 will be gradually compressed. When the second rack rod 15 moves to the right, the first rack rod 13 will move back to the inside of the housing 1. When the second rack rod 15 is completely moved to the initial position, the first spring 16 is also compressed to the maximum extent. At this time, the clamp 17 is rotated to block the side wall of the second rack rod 15 to fix the second rack rod 15 and the first spring 16 in this position, and then the connecting pipe 4 can be installed with the housing 1.

[0019] The rotating group includes a retaining rod 18, a slide groove 19 and a torsion spring 20. The slide groove 19 is opened on the inner wall of the shell 1. The slide groove 19 is located on the left side of the frame 12. A second spring 21 is fixedly connected between the retaining rod 18 and the inner wall of the slide groove 19. The torsion spring 20 is arranged on one side of the rotating shaft of the filter 3. The torsion spring 20 is used to rotate the filter 3 after the retaining rod 18 is separated from the filter 3.

[0020] like Figure 6-Figure 8As shown, when the access end 11 and the connecting pipe 4 are disassembled, the filter screen 3 is inside the shell 1. At this time, the clamp 17 can be rotated to one side, so that the first spring 16 drives the second rack rod 15 to move to the left. At this time, the first rack rod 13 will drive the frame 12 and the filter screen 3 to move to the right. When the filter screen 3 moves to the right, the second spring 21 will push the retaining rod 18 to move with the filter screen 3 and the frame 12. At this time, the retaining rod 18 will keep blocking the left side of the filter screen 3 and slide along the slide groove 19 to prevent the torsion force of the torsion spring 20 from tilting the filter screen 3. At this time, the frame 12 will push the dust accumulated inside the shell 1 outward, and when When the first rack rod 13 drives the filter screen 3 to move to a certain distance outside the housing 1, the retaining rod 18 will move to the limit distance on the right side of the slide slot 19. At this time, the retaining rod 18 cannot continue to move to the right and will stay at this position, and at this time, the first rack rod 13 and the second rack rod 15 will continue to move. In this process, when the frame 12 and the filter screen 3 continue to move to the right, the torsion spring 20 will cause the filter screen 3 to gradually rotate around the rotation axis inside the frame 12 and tilt, and the position of the filter screen 3 near the top will rest on the retaining rod 18, and gradually tilt during the movement to the right, so that the dust on the filter screen 3 can gradually fall off the outside of the housing 1; When the connecting pipe 4 and the access end 11 are installed, the second rack rod 15 and the first rack rod 13 will move to the right and left respectively. During this process, the retaining rod 18 will be gradually pushed to rotate from an inclined state to a horizontal state when the filter screen 3 moves to the left. After the filter screen 3 rotates to the horizontal state, the retaining rod 18 will be forcibly pushed to the left by the frame 12. At this time, the second spring 21 is gradually compressed until the second rack rod 15 compresses the first spring 16 to the limit, and then the retaining rod 18 also compresses the second spring 21 to the limit.

[0021] The rotating shafts on the left and right sides of the filter 3 are both rectangular, and the rotating shafts of the filter 3 are slidably connected with connecting heads 22, and the connecting heads 22 are rotatably connected to the inner wall of the frame 12. The torsion spring 20 is sleeved on the rotating shaft of the connecting head 22, and the side walls of the connecting head 22 are slidably connected with the limiting head 23, and a third spring 24 is fixedly connected between the limiting head 23 and the connecting head 22.

[0022] like Fig.12 and Fig.13 As shown: when the filter 3 needs to be replaced, it is only necessary to pull the two limit heads 23 to the front and rear sides respectively, and the limit heads 23 will slide along the connecting head 22 and compress the third spring 24. At this time, the rectangular groove between the limit heads 23 and the connecting head 22 will be exposed, and then the internal filter 3 can be directly taken out; The rotating shaft of the filter 3 is rectangular, and can be placed inside the connector 22 and the limit head 23 without actively rotating. The torsion spring 20 arranged on the rotating shaft of the connector 22 can provide power for the rotation of the connector 22 and the filter 3.

[0023] A driving rod 25 is slidably connected to the first rack rod 13, and a driving wheel 26 and a transmission wheel 27 are rotatably connected to the driving rod 25. The driving wheel 26 meshes with the transmission wheel 27. An incomplete toothed disc 28 is fixedly connected to the transmission wheel 27, and a third rack rod 29 meshes with the incomplete toothed disc 28. The third rack rod 29 is slidably connected to the driving rod 25, and a fourth spring 30 is fixedly connected between the third rack rod 29 and the driving rod 25. A driving group is provided on one side of the driving rod 25, and the driving group is used to make the driving rod 25 move away from or close to the inner wall of the shell 1 when the first rack rod 13 moves left and right.

[0024] like Figure 6 , Figure 8-Figure 11 As shown: when the second rack bar 15 moves to the left and drives the first rack bar 13 to move to the right through the gear 14, the driving wheel 26 will contact the inner wall of the housing 1 and rotate with the movement of the first rack bar 13. When the driving wheel 26 rotates, it will drive the transmission wheel 27 to rotate, and the transmission wheel 27 will drive the incomplete toothed disc 28 to rotate. The incomplete toothed disc 28 will intermittently drive the third rack bar 29 to move to the left and disengage. When the incomplete toothed disc 28 is not engaged with the third rack bar 29, the third rack bar 29 will be quickly driven to move to the right under the action of the fourth spring 30. At this time, the end of the third rack bar 29 will hit the side wall of the frame 12, and then in the process of the frame 12 moving to the right, the vibration generated will accelerate the falling of dust on the filter screen 3, thereby improving the cleaning efficiency. When the second rack rod 15 moves to the right, the driving group drives the driving rod 25 to move away from the inner wall of the shell 1. At this time, the driving rod 25 moves along the first rack rod 13, so that the driving wheel 26 does not contact the inner wall of the shell 1.

[0025] The access end 11 is slidably connected to the shell 1, and the end of the access end 11 extends into the interior of the shell 1. The driving group includes an extension rod 31 and a fifth spring 32. The extension rod 31 is slidably connected to the side wall of the shell 1 in the front-to-back direction, and the outside of the extension rod 31 is slidably connected to the driving rod 25 in the left-to-right direction. The fifth spring 32 is fixedly connected between the driving rod 25 and the first rack rod 13. When the access end 11 slides left and right inside the shell 1, it will contact or disengage from the side wall of the extension rod 31, and the side wall of the extension rod 31 is provided with an inclined surface.

[0026] like Figure 7-10As shown: the access end 11 is slidably connected with the housing 1, then before the access end 11 is installed with the connecting pipe 4, the access end 11 is first slid to the right to the limit, at which time the end of the connecting end 11 inside the housing 1 will move to the right relative to the driving rod 25 and the left end of the extension rod 31, at which time the left end of the extension rod 31 is separated from the right end of the access end 11, and at this time the fifth spring 32 will be elastically released to allow the driving rod 25 to slide along the first rack rod 13, and at this time the driving wheel 26 will not contact the inner wall of the housing 1; After the access end 11 enters the interior of the connecting pipe 4, the shell 1 is pushed to the right. At this time, the shell 1 will drive the access end 11 to move to the right together, and the rear tooth 9 will lock the left end of the access end 11. At this time, when the shell 1 is moved to the right, the access end 11 will slide to the left along the shell 1 to the limit. At this time, the right end of the access end 11 will push the inclined surface on the extension rod 31, thereby moving the extension rod 31. At this time, the driving rod 25 squeezes the fifth spring 32. At this time, the driving rod 25 and the driving wheel 26 will be close to the inner wall of the shell 1. When the connection between the connecting pipe 4 and the access end 11 is subsequently released, the second rack rod 15 moves to the left, the first rack rod 13 moves to the right, and the driving wheel 26 rotates in the process of contacting with the inner wall of the shell 1, and the driving wheel 26 contacts with the transmission wheel 27, and the friction between the two drives the transmission wheel 27 and the incomplete toothed disc 28 to rotate, and when the first rack rod 13 drives the driving rod 25 to move, the driving rod 25 slides along the extension rod 31.

[0027] The holding rod 18 is rotatably connected to a roller 33; Figure 8 As shown, the roller 33 can reduce the friction between the filter screen 3 and the holding rod 18 when they are in contact.

[0028] The two first rack rods 13 are each provided with a limiting groove 35 , and both ends of the frame 12 are slidably connected to the two limiting grooves 35 , respectively. A sixth spring 34 is fixedly connected between the two limiting grooves 35 and the left and right sides of the inner wall of the frame 12 .

[0029] like Fig.12 As shown, the limiting groove 35 and the sixth spring 34 can allow the frame 12 to have a certain left-right sliding distance inside the first rack rod 13, and can provide a certain buffer when subjected to external collision.

Claims

1. A ventilation device for a coal mine excavation working face, comprising a housing (1), a fan (2) rotatably connected to the inside of the housing (1), a filter (3) located inside the housing (1), and a connecting pipe (4) located on one side of the housing (1), characterized in that: The connecting pipe (4) is provided with a socket end (5) on the left side, a positioning ring (6) is fixedly connected to the inner wall of the right side of the connecting pipe (4), a retaining ring (7) is provided on the left side of the positioning ring (6), a clamping ring (8) is provided between the retaining ring (7) and the positioning ring (6), and the clamping ring (8) can move left and right between the retaining ring (7) and the positioning ring (6), a plurality of groups of teeth (9) are fixedly connected to the inner wall of the clamping ring (8), and the clamping ring (8) is fixedly connected to a plastic ring (10), an access end (11) is provided at the left end of the housing (1), and the access end (11) can be inserted into the inside of the plastic ring (10) and the clamping ring (8) from the right side, a frame (12) is provided inside the housing (1), and the filter screen (3) is rotatably connected inside the frame (12), and a rotating group is provided on one side of the filter screen (3), and the rotating group is used to tilt the filter screen (3) after the filter screen (3) moves to the right side of the housing (1), The frame (12) is provided with a first rack rod (13) on both the front and rear sides. The frame (12) can move with the first rack rod (13). The first rack rods (13) are slidably connected to the inner wall of the shell (1) in the left and right directions. The two first rack rods (13) are meshed with a gear (14). The two gears (14) are rotatably connected to the inner wall of the shell (1). The two gears (14) are meshed with a second rack rod (15) on the side away from the first rack rod (13). The two second rack rods (15) are slidably connected to the shell (1) and the left ends of the two second rack rods (15) are located outside the shell (1). The two second rack rods (15) are fixedly connected to the shell (1) with a first spring (16). The left sides of the two second rack rods (15) are provided with a clamp (17). The clamp (17) is rotatably connected to the side wall of the shell (1).

2. The ventilation device according to claim 1, characterized in that: The rotating group comprises a retaining rod (18), a slide groove (19) and a torsion spring (20); the slide groove (19) is formed on the inner wall of the housing (1); the slide groove (19) is located on the left side of the frame (12); a second spring (21) is fixedly connected between the retaining rod (18) and the inner wall of the slide groove (19); the torsion spring (20) is arranged on one side of the rotating shaft of the filter screen (3); the torsion spring (20) is used to rotate the filter screen (3) after the retaining rod (18) is separated from the filter screen (3).

3. The ventilation device according to claim 2, characterized in that: The rotating shafts on the left and right sides of the filter (3) are both rectangular, and the rotating shafts of the filter (3) are slidably connected to connecting heads (22). The connecting heads (22) are rotatably connected to the inner wall of the frame (12), and the torsion springs (20) are sleeved on the rotating shafts of the connecting heads (22). The side walls of the connecting heads (22) are slidably connected to the limiting heads (23), and a third spring (24) is fixedly connected between the limiting heads (23) and the connecting heads (22).

4. The ventilation device according to claim 1, characterized in that: The first rack rod (13) is slidably connected to a driving rod (25), the driving rod (25) is rotatably connected to a driving wheel (26) and a transmission wheel (27) that mesh with each other, the transmission wheel (27) is fixedly connected to an incomplete toothed disc (28), the incomplete toothed disc (28) meshes with a third rack rod (29), the third rack rod (29) is slidably connected to the driving rod (25), a fourth spring (30) is fixedly connected between the third rack rod (29) and the driving rod (25), and a driving group is provided on one side of the driving rod (25), the driving group being used to move the driving rod (25) away from or closer to the inner wall of the housing (1) when the first rack rod (13) moves left and right.

5. The ventilation device according to claim 4, characterized in that: The access end (11) is slidably connected to the housing (1), and an end of the access end (11) extends into the interior of the housing (1). The drive group comprises an extension rod (31) and a fifth spring (32). The extension rod (31) is slidably connected to the side wall of the housing (1) in the front-rear direction, and the exterior of the extension rod (31) is slidably connected to the drive rod (25) in the left-right direction. The fifth spring (32) is fixedly connected between the drive rod (25) and the first rack rod (13). When the access end (11) slides left-right inside the housing (1), it contacts or disengages from the side wall of the extension rod (31), and the side wall of the extension rod (31) is provided with an inclined surface.

6. The ventilation device according to claim 2, characterized in that: A roller (33) is rotatably connected to the retaining rod (18).

7. The ventilation device according to claim 1, characterized in that: The two first rack rods (13) are each provided with a limiting groove (35), the two ends of the frame (12) are respectively slidably connected to the two limiting grooves (35), and a sixth spring (34) is fixedly connected between the two limiting grooves (35) and the left and right sides of the inner wall of the frame (12).

8. The ventilation device according to any one of claims 1 to 7, characterized in that: A sealing ring for sealing the clamping ring (8) and the access end (11) is provided on one side of the tooth (9).

Images