Dust removal device for tunneling mining operation
By designing a multi-angle adjustable air intake guide mechanism and expansion plate, combined with motor control, the problems of large space occupation and poor dust removal effect of dust removal pipelines were solved, achieving efficient dust collection and safe production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- OTUOKE QIANQI GREAT WALL NO 5 MINING CO LTD
- Filing Date
- 2025-04-17
- Publication Date
- 2026-05-05
AI Technical Summary
Existing dust removal pipelines occupy a large amount of space in the mine tunnel during tunneling and mining operations, have poor dust removal effect, and cannot effectively approach the tunneling face, resulting in dust spreading and affecting safe production.
A dust collection device was designed, comprising a dust collection box, an air compression tank, a negative pressure fan, an air intake guide mechanism, and a bag filter mechanism. By adjusting the air intake direction and the size and shape of the expansion plate at multiple angles, combined with motor control, efficient dust collection can be achieved.
It improves dust collection efficiency, reduces equipment space occupation, enhances the adaptability and automation of the device, reduces maintenance costs, and ensures the stability and reliability of dust removal effect.
Smart Images
Figure CN224194351U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dust removal equipment technology, and in particular to a dust removal device for tunneling and mining operations. Background Technology
[0002] In mining operations, tunneling is the most common method for mining operations. Due to the high-speed rotation and strong impact of the drill bit in the tunneling equipment, the rock and soil are broken into powder, generating a large amount of dust. Especially when excavating tunnels in coal seams, the drill bit rotates and vibrates the coal seam, generating rock-digging stress, which causes larger coal blocks to be broken into smaller pieces, accompanied by a large amount of dust, seriously affecting the working environment and hindering safe production.
[0003] Currently, in order to solve the dust problem mentioned above, during the tunneling and mining operations, the general practice is to lay pipelines inside the mine tunnel and connect one end of the pipeline to an external negative pressure fan. The dust inside the mine tunnel is discharged through the cooperation of the negative pressure fan and the pipeline.
[0004] While the aforementioned dust removal methods can achieve some dust control, they still have the following shortcomings in practical use: First, the pipelines need to be continuously laid along with the tunnel's excavation depth. This method causes the dust removal pipelines and ventilation pipelines to occupy space within the mine tunnel, compressing the installation and operating space for other mechanical equipment and affecting the operation of some equipment. Second, the existing dust removal pipelines cannot effectively approach the excavation face for dust removal, allowing some dust to still diffuse into the mine tunnel, thus preventing further improvement in dust removal efficiency and resulting in poor dust control performance. Utility Model Content
[0005] The purpose of this utility model is to overcome the shortcomings of existing technologies, such as the occupation of mine tunnel space by dust removal pipelines and poor dust removal effect, and to provide a dust removal device for tunneling and mining operations.
[0006] This utility model is achieved through the following technical solution: a dust removal device for tunneling and mining operations, including a dust removal box, an air compression tank is arranged on the front side of the dust removal box, a negative pressure fan is arranged on the dust removal box, the negative pressure fan and the air compression tank are located on the same side, the air compression tank and the negative pressure fan are electrically connected to the main control box on the rear side of the dust removal box through connecting lines; a maintenance cover is movably arranged on one side of the dust removal box, an air inlet is arranged on the other side of the dust removal box, and a filter bag mechanism is movably arranged inside the dust removal box; one side of the air inlet is connected to the dust removal box, and an air inlet guide mechanism is arranged on the other side of the air inlet.
[0007] The structure of this utility model is clear and reasonable. Its air compressor tank, negative pressure fan and main control box are electrically connected, which facilitates centralized control and management. The inspection cover facilitates maintenance and repair of the dust collector. The cooperation between the air inlet and the air inlet guide mechanism can introduce dust-laden air into the dust collector, providing a foundation for subsequent dust removal operations.
[0008] This design allows for a clear division of labor among the components. The air compressor tank provides compressed air for cleaning and other operations, the negative pressure fan provides suction to circulate the air, the main control box coordinates the operation of each component, and the bag filter achieves dust filtration. The overall structure has good modularity, making it easy to install, debug, and maintain.
[0009] A further improvement of this utility model is that the air intake guide mechanism includes a first connecting flange, a second connecting flange, and a connecting block. Two first bearings are provided on one side of the first connecting flange, and two second bearings are provided on the side of the second connecting flange opposite to the first connecting flange. The connecting block is movably connected between the two first bearings and the two second bearings. The side of the first connecting flange opposite to the first bearings is connected to the air intake, and the side of the second connecting flange opposite to the second bearings is provided with a side pipe. One end of the side pipe is connected to the second connecting flange, and several expansion plates are movably provided at the other end of the side pipe. An adjusting ring is movably provided at the end of the side pipe near the expansion plates.
[0010] The air intake guide mechanism, connected by a first connecting flange, a second connecting flange, and a connecting block, allows for multi-angle rotation and adjustment. This enables the air intake direction to be adjusted according to actual tunneling and mining operations, improving dust capture efficiency and ensuring effective collection of dust-laden air in various working scenarios. Furthermore, the expansion plate and adjusting ring on the side pipe can change the size and shape of the air intake, further enhancing dust collection capabilities. The opening of the expansion plate can be adjusted according to dust concentration and distribution to adapt to different working environments.
[0011] A further improvement of this utility model is that a third base is provided on the side of the first connecting flange near the air inlet, a third motor is provided on the third base, and the third motor is electrically connected to the main control box on the rear side of the dust collector box through a connecting wire.
[0012] The third motor provides power for the rotation of the air intake guide mechanism. Under the control of the main control box, the third motor can precisely drive the air intake guide mechanism to rotate in the horizontal direction, realizing flexible adjustment of the air intake direction and improving the automation and adaptability of the device.
[0013] A further improvement of this utility model is that a first machine base is provided on one of the first shaft seats, a first motor is provided on the first machine base, and the first motor is electrically connected to the main control box on the rear side of the dust collector via a connecting wire.
[0014] The first motor enables the air intake guide mechanism to rotate in the vertical direction. In conjunction with the third motor, it enables the air intake guide mechanism to be adjusted at multiple angles in both the horizontal and vertical dimensions, further enhancing the device's ability to collect dust from different positions and directions.
[0015] A further improvement of this utility model is that the two first bearing seats are arranged symmetrically, and the two second bearing seats are arranged symmetrically, and the axes of the two first bearing seats are perpendicular to the axes of the two second bearing seats.
[0016] The symmetrical arrangement of the two first bearings and two second bearings, along with the perpendicular design of the axes, ensures the stability and reliability of the connecting block during rotation. This structure makes the intake guide mechanism more stable when adjusting the intake direction, reducing swaying and deviation, and improving the accuracy of adjustment.
[0017] Further improvements to this utility model include: the connecting block has an internal air hole structure; a fixed shaft is provided on the outside of the connecting block; two of the fixed shafts are symmetrically arranged and rotatably mounted in two first shaft seats; the other two fixed shafts are symmetrically arranged and rotatably mounted in two second shaft seats; the output end of the first motor is connected to one of the vertical fixed shafts; a side plate is fixedly installed on one side of one of the second shaft seats; and the output end of the third motor is connected to the middle of one side of the side plate.
[0018] The connecting block has internal air vents through which a corrugated flexible hose runs, providing a smooth flow channel for dusty air. Simultaneously, the first and third motors are connected to a fixed shaft, enabling precise rotation of the connecting block in different directions, allowing for accurate adjustment of the air intake direction without affecting normal airflow.
[0019] A further improvement of this utility model is that the interior of the second connecting flange and the interior of the first connecting flange are movably connected to a corrugated hose, and the corrugated hose passes through the air hole inside the connecting block.
[0020] The use of the corrugated hose can compensate for the relative displacement of the first connecting flange and the second connecting flange during rotation, ensuring that air can smoothly enter the dust collector from the air intake guide mechanism when adjusting the air intake direction, avoiding problems such as air leakage or poor airflow caused by displacement of the connection parts.
[0021] A further improvement of this utility model is that a second base is provided on the outer side of the side tube, a second motor is provided on the second base, a gear is provided at the output end of the second motor, and a guide rail is also provided on the outer side of the side tube. The gear and the guide rail are used to connect the adjusting ring. Several fixing seats are provided on the outer side of the side tube near the guide rail. The several fixing seats are used to install the expansion plate.
[0022] The second motor, gears, and guide rail work together to power the rotation of the adjusting ring, thereby adjusting the opening degree of the expansion plate. This mechanical transmission method is simple and reliable, and can precisely control the opening and closing degree of the expansion plate to adapt to different dust collection needs. Moreover, the fixed base provides a stable mounting foundation for the expansion plate, ensuring that the expansion plate can reliably rotate and open and close during operation, and guaranteeing the stability of the air inlet size and shape adjustment.
[0023] A further improvement of this utility model is that a toothed ring is provided on the outer side of the adjusting ring, a rotating groove is provided on the inner side of the toothed ring, and several pressure blocks are provided on the inner side of the adjusting ring. The adjusting ring and the toothed ring are rotatably arranged on the outer side of the side tube, and the rotating groove is rotatably arranged on the guide rail. The outer side of the toothed ring is meshed with a gear.
[0024] The toothed ring on the outer side of the adjusting ring meshes with a gear, allowing the power of the second motor to be effectively transmitted to the adjusting ring, thus enabling its rotation. The cooperation between the rotating groove and the guide rail ensures the stability and accuracy of the adjusting ring during rotation, further improving the precision of the expansion plate opening adjustment.
[0025] Further improvements to this utility model include: the expansion plate has a fan-shaped structure, and several expansion plates form a horn-shaped guide cover; two fixing plates are fixedly connected to the side of the expansion plate near the side tube, the fixing plates are axially connected to the fixing seat, and the pins located on both sides of the fixing seat are fitted with torsion springs, and a rubber skin is movably connected between the two expansion plates.
[0026] During the opening and closing of the expansion plate, the rubber skin acts as a seal to prevent dust leakage. Simultaneously, the fan-shaped structure of the expansion plate better adapts to the adjustment needs of air inlets of different shapes and sizes, improving the device's adaptability to various working environments. Furthermore, the torsion spring ensures that the expansion plate automatically resets when no external force is applied, guaranteeing that the expansion plate returns to its initial state after the device is not in use or after adjustment, facilitating future use and adjustment.
[0027] As can be seen from the above technical solutions, the beneficial effects of this utility model are:
[0028] 1. This utility model achieves multi-angle adjustment through an air intake guide mechanism, allowing for flexible rotation in both horizontal and vertical dimensions, and the air intake direction can be adjusted according to actual tunneling and mining operations. Simultaneously, the adjustable expansion plate can change the size and shape of the air intake, and the rubber skin ensures a tight seal, enabling the device to accurately capture dust from different locations and with varying concentrations, greatly improving dust collection efficiency.
[0029] 2. The air compressor tank, negative pressure fan, first motor, second motor, and third motor described in this utility model are all electrically connected to the main control box, which enables centralized control and management. Each motor can precisely drive the corresponding component according to actual needs, realizing automated adjustment of the air intake direction and expansion plate opening, reducing manual intervention, and improving the adaptability and operating efficiency of the device.
[0030] 3. This utility model adopts a modular design with clearly defined functions for each component. The inspection cover facilitates maintenance and repair of the dust collector's interior. The corrugated hose compensates for displacement at the connection points, ensuring smooth airflow and preventing leakage. The torsion spring allows the expansion plate to automatically reset. These design features improve the stability and reliability of the device, reduce maintenance costs and failure rates, and ensure long-term stable operation. Attached Figure Description
[0031] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0032] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.
[0033] Figure 2 This is a schematic diagram of the air intake guide mechanism according to a specific embodiment of the present utility model.
[0034] Figure 3 This is a schematic diagram of the first connecting flange, the second connecting method, and the disassembled connecting block in a specific embodiment of this utility model.
[0035] Figure 4 for Figure 2 A magnified view of part A in the middle.
[0036] Figure 5 This is a schematic diagram of the disassembled structure of the side tube and the adjusting ring in a specific embodiment of this utility model.
[0037] In the diagram: 1. Dust collector; 2. Air compressor tank; 3. Negative pressure fan; 4. Inspection cover; 5. Air inlet; 6. Bag filter mechanism; 7. Air inlet guide mechanism; 8. First connecting flange; 9. First shaft seat; 10. Second connecting flange; 11. Second shaft seat; 12. Side pipe; 13. Adjusting ring; 14. Expansion plate; 15. First base; 16. First motor; 17. Connecting block; 18. Fixed shaft; 19. Side plate; 20. Corrugated hose; 21. Second base; 22. Second motor; 23. Gear; 24. Guide rail; 25. Gear ring; 26. Rotary groove; 27. Pressure block; 28. Third base; 29. Third motor; 30. Fixed seat; 31. Fixed plate; 32. Torsion spring; 33. Rubber skin. Detailed Implementation
[0038] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.
[0039] Please refer to the attached document. Figure 1 The following is a description of a specific embodiment: The dust removal device for tunneling and mining operations of this utility model includes a dust removal box 1, an air compression tank 2 fixedly installed on the front side of the dust removal box 1, a negative pressure fan 3 installed on the dust removal box 1, the negative pressure fan 3 and the air compression tank 2 located on the same side, and the air compression tank 2 and the negative pressure fan 3 are electrically connected to the main control box on the rear side of the dust removal box 1 through connecting lines, an inspection cover 4 is movably installed on one side of the dust removal box 1, an air inlet 5 is fixedly installed on the other side of the dust removal box 1, a bag filter mechanism 6 is movably installed inside the dust removal box 1, and an air inlet guide mechanism 7 is provided on one side of the air inlet 5.
[0040] See attached document Figure 2 and 3 The intake guide mechanism 7 includes a first connecting flange 8, a second connecting flange 10, and a connecting block 17. Two first bearings 9 are fixedly installed on one side of the first connecting flange 8. Two second bearings 11 are fixedly installed on the second connecting flange 10 relative to the first connecting flange 8. The connecting block 17 is movably connected between the two first bearings 9 and the two second bearings 11. The side of the first connecting flange 8 opposite to the first bearings 9 is also fixedly installed on the side of the intake port 5. A side pipe 12 is fixedly installed on the side of the second connecting flange 10 opposite to the second bearings 11. Multiple expansion plates 14 are movably installed on the outside of the side pipe 12. An adjusting ring 13 is also movably installed on the outside of the side pipe 12 near the expansion plates 14.
[0041] The two first bearing seats 9 and the two second bearing seats 11 are symmetrically arranged, with the axes of the two first bearing seats 9 perpendicular to the axes of the two second bearing seats 11. This symmetrical arrangement and perpendicular axis design of the two first bearing seats 9 and the two second bearing seats 11 ensures the stability and reliability of the connecting block 17 during rotation. This structure makes the intake guide mechanism more stable when adjusting the intake direction, reducing swaying and deviation, and improving the adjustment accuracy.
[0042] See attached document Figure 2 A third base 28 is fixedly installed on the outside of the first connecting flange 8. A third motor 29 is fixedly installed on one side of the third base 28, and the third motor 29 is electrically connected to the main control box at the rear of the dust collector 1 via a connecting cable. A first base 15 is fixedly installed on one of the first shaft seats 9. A first motor 16 is fixedly installed on the first base 15, and the first motor 16 is electrically connected to the main control box at the rear of the dust collector 1 via a connecting cable.
[0043] See attached document Figure 2 and 3 The connecting block 17 has air vents inside, and multiple fixed shafts 18 are fixedly installed on the outside of the connecting block 17. Two of the fixed shafts 18 are rotatably installed in corresponding first shaft seats 9, and the other two fixed shafts 18 are rotatably installed in corresponding second shaft seats 11. The output end of the first motor 16 is fixedly connected to one of the vertical fixed shafts 18. A side plate 19 is fixedly installed on one side of one of the second shaft seats 11, and the output end of the third motor 29 is fixedly connected to the middle of one side of the side plate 19. A corrugated hose 20 is movably connected to the second connecting flange 10 and the first connecting flange 8, and the corrugated hose 20 also passes through the air vents inside the connecting block 17. By rotatably connecting the two first shaft seats 9 and the two second shaft seats 11 to the outside of the connecting block 17, the first motor 16 and the third motor 29 can be used to achieve multi-directional angle adjustment of the second connecting flange 10, thereby facilitating the adjustment of the dust suction direction according to the excavation position.
[0044] See attached document Figure 4 and 5 A second base 21 is fixedly installed on the outer side of the side tube 12. A second motor 22 is fixedly installed on one side of the second base 21. A gear 23 is fixedly installed at the output end of the second motor 22. A guide rail 24 is also provided on the outer side of the side tube 12. Multiple fixing seats 30 are fixedly installed on the outer side of the side tube 12 near the guide rail 24. The guide rail 24 on the outer side of the side tube 12 allows the adjusting ring 13 to rotate axially on the outer side of the side tube 12. The fixing seats 30 provide installation conditions for the rotational installation of the expansion plate 14.
[0045] See attached document Figure 5A toothed ring 25 is fixedly installed on the outer side of the adjusting ring 13. A rotating groove 26 is opened on the inner side of the toothed ring 25. Multiple pressure blocks 27 are fixedly installed on the inner side of the adjusting ring 13. The adjusting ring 13 and the toothed ring 25 are rotatably installed on the outer side of the side tube 12, and the rotating groove 26 is rotatably installed on the guide rail 24. The outer side of the toothed ring 25 is meshed with the gear 23.
[0046] See attached document Figure 4 The expansion plate 14 has a fan-shaped structure, and several expansion plates 14 form a horn-shaped guide cover. Two fixed plates 31 are fixedly connected to the side of the expansion plate 14 near the side tube 12. The fixed plates 31 are axially connected to the fixed base 30, and the pins located on both sides of the fixed base 30 are also fitted with torsion springs 32. A rubber skin 33 is movably connected between the two expansion plates 14. The third base 28 can drive the gear ring 25 to rotate through the third motor 29, so that the adjusting ring 13, together with the multiple pressure blocks 27 on the inner side, simultaneously applies pressure to the multiple fixed plates 31. Thus, the angle of the multiple expansion plates 14 can be adjusted by using the lever principle, so that the multiple expansion plates 14, together with the interconnected rubber skin 33, can adjust the guiding area of the dust suction airflow.
[0047] It should be noted that when the dust collector 1 is installed on the tunneling equipment or the attached mobile platform, the multiple expansion plates 14 can be oriented towards the tunneling face. Subsequently, the negative pressure fan 3 is started through the main control box at the rear of the dust collector 1, which in turn draws air through the dust collector 1, the air inlet 5, and the corrugated hose 20. This allows the dust generated at the tunneling face to be drawn into the corrugated hose 20 through the multiple expansion plates 14 and the guide hood formed by the skin connecting the expansion plates 14. The dust then enters the dust collector 1 through the corrugated hose 20 and is intercepted and filtered by the bag filter mechanism 6, thereby treating the dust generated during tunneling. When targeted adjustment of the suction direction is required, the main control box and handheld terminal can be used to sequentially control the rotation of the first motor 16 and the third motor 29. Specifically, the output of the first motor 16 drives one of the vertical fixed shafts 18 to rotate, causing the connecting block 17 to rotate between the two first bearing seats 9 around the two vertical fixed shafts 18. The connecting block 17, through the two horizontal fixed shafts 18, drives the two second bearing seats 11 to rotate horizontally, allowing the second bearing seats 11 to rotate the side tube 12 and multiple expansion plates 14 in the X-axis direction via the second connecting flange 10. Simultaneously, the output of the third motor 29 drives the side plate 19 to rotate, causing it to rotate on the horizontal fixed shaft 18, thus achieving the Y-axis rotation of the second connecting flange 10. This, in conjunction with the first bearing seats 9, enables multi-directional angle adjustment of the multiple expansion plates 14.
[0048] Furthermore, the expansion area of multiple expansion plates 14 can be adjusted according to the on-site operating space. Specifically, the output end of the second motor 22 drives the gear 23 to rotate, and the gear 23 meshes with the outer side of the gear ring 25, allowing the gear ring 25 to rotate on the outside of the side tube 12 through the inner rotating groove 26. Simultaneously, the gear ring 25 drives the adjusting ring 13 to rotate at a certain angle. Thus, the multiple pressure blocks 27 on the inner side of the adjusting ring 13 press down on the corresponding two fixed plates 31 by the change in the slope angle, and together with the force of the torsion spring 32 on the expansion plates 14, the angle of multiple expansion plates 14 can be adjusted simultaneously, thereby adjusting the expansion area of multiple expansion plates 14 and the skin.
[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A dust removal device for tunneling and mining operations, comprising a dust collection box (1), characterized in that, An air compressor tank (2) is provided on the front side of the dust collector (1), and a negative pressure fan (3) is provided on the dust collector (1). The negative pressure fan (3) and the air compressor tank (2) are located on the same side, and the air compressor tank (2) and the negative pressure fan (3) are electrically connected to the main control box on the rear side of the dust collector (1) through connecting lines respectively. A maintenance cover (4) is movably provided on one side of the dust collector (1), and an air inlet (5) is provided on the other side of the dust collector (1). A bag filter mechanism (6) is movably provided inside the dust collector (1). One side of the air inlet (5) is connected to the dust collector (1), and an air inlet guide mechanism (7) is provided on the other side of the air inlet (5).
2. The dust removal device for tunneling and mining operations according to claim 1, characterized in that, The intake guide mechanism (7) includes a first connecting flange (8), a second connecting flange (10), and a connecting block (17). Two first bearings (9) are provided on one side of the first connecting flange (8), and two second bearings (11) are provided on the side of the second connecting flange (10) opposite to the first connecting flange (8). The connecting block (17) is movably connected between the two first bearings (9) and the two second bearings (11). The side of the first connecting flange (8) opposite to the first bearings (9) is connected to the intake port (5), and the side of the second connecting flange (10) opposite to the second bearings (11) is provided with a side pipe (12). One end of the side pipe (12) is connected to the second connecting flange (10), and several expansion plates (14) are movably provided at the other end of the side pipe (12). An adjusting ring (13) is movably provided at the end of the side pipe (12) near the expansion plate (14).
3. A dust removal device for tunneling and mining operations according to claim 2, characterized in that, A third base (28) is provided on the side of the first connecting flange (8) near the air inlet (5). A third motor (29) is provided on the third base (28), and the third motor (29) is electrically connected to the main control box on the back of the dust collector (1) through a connecting line.
4. A dust removal device for tunneling and mining operations according to claim 3, characterized in that, A first base (15) is provided on one of the first shaft seats (9), and a first motor (16) is provided on the first base (15). The first motor (16) is electrically connected to the main control box on the back of the dust collector (1) through a connecting line.
5. A dust removal device for tunneling and mining operations according to claim 4, characterized in that, Two first bearings (9) are arranged symmetrically, and two second bearings (11) are arranged symmetrically, and the axes of the two first bearings (9) are perpendicular to the axes of the two second bearings (11).
6. A dust removal device for tunneling and mining operations according to claim 5, characterized in that, The connecting block (17) has an internal air hole structure. A fixed shaft (18) is provided on the outside of the connecting block (17). Two of the fixed shafts (18) are symmetrically arranged and rotatably installed in two first shaft seats (9). The other two fixed shafts (18) are symmetrically arranged and rotatably installed in two second shaft seats (11). The output end of the first motor (16) is connected to one of the vertical fixed shafts (18). A side plate (19) is fixedly installed on one side of one of the second shaft seats (11). The output end of the third motor (29) is connected to the middle of one side of the side plate (19).
7. A dust removal device for tunneling and mining operations according to claim 6, characterized in that, The interior of the second connecting flange (10) and the interior of the first connecting flange (8) are movably connected by a corrugated hose (20), and the corrugated hose (20) passes through the air hole inside the connecting block (17).
8. A dust removal device for tunneling and mining operations according to claim 7, characterized in that, A second base (21) is provided on the outside of the side tube (12), a second motor (22) is provided on the second base (21), a gear (23) is provided at the output end of the second motor (22), and a guide rail (24) is also provided on the outside of the side tube (12). The gear (23) and the guide rail (24) are used to connect the adjusting ring (13); a number of fixed seats (30) are provided on the outside of the side tube (12) near the guide rail (24). The number of fixed seats (30) are used to install the expansion plate (14).
9. A dust removal device for tunneling and mining operations according to claim 8, characterized in that, A toothed ring (25) is provided on the outer side of the adjusting ring (13), and a rotating groove (26) is provided on the inner side of the toothed ring (25). Several pressure blocks (27) are provided on the inner side of the adjusting ring (13). The adjusting ring (13) and the toothed ring (25) are rotatably disposed on the outer side of the side tube (12), and the rotating groove (26) is rotatably disposed on the guide rail (24). The outer side of the toothed ring (25) is meshed with the gear (23).
10. A dust removal device for tunneling and mining operations according to claim 9, characterized in that, The expansion plate (14) has a fan-shaped structure, and several of the expansion plates (14) form a horn-shaped guide cover; two fixing plates (31) are fixedly connected to the side of the expansion plate (14) near the side tube (12), the fixing plates (31) are axially connected to the fixing seat (30), and the pins located on both sides of the fixing seat (30) are fitted with torsion springs (32), and a rubber skin (33) is movably connected between the two expansion plates (14).