A ventilation and dust removal device for coal mine operations
By combining dust-filtering ventilation with a slow-moving wall-fixing mechanism, the flow rate of dust-laden gas is buffered and the spray reduces dust on the inner wall of the roadway, solving the problems of dust and filter clogging in coal mine operations and improving the efficiency and safety of ventilation and dust removal equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INNER MONGOLIA BEILIANDIAN GAOTOUYAO MINING INDUSTRY CO LTD
- Filing Date
- 2026-04-22
- Publication Date
- 2026-05-29
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing ventilation and dust removal equipment in coal mines has a high airflow rate when discharging gas from the tunneling area, which can easily cause dust to rise in the roadway. Furthermore, the dust-laden air recirculates into the tunneling area, increasing the dust concentration. The filter screen also experiences high filtration pressure and is prone to clogging.
The system combines a dust-filtering ventilation mechanism with a slow-speed wall-fixing mechanism. Through dust collection components, filter components, mist guiding components, atomizing components, buffer components, and spray components, the flow rate of dust-laden gas is buffered, and the spray reduces dust on the inner wall of the tunnel, increases its adhesion, reduces secondary dust, and lowers the filtration pressure.
It effectively reduced the probability of dust in the tunnels, improved filtration efficiency, and enhanced mine safety and air quality.
Smart Images
Figure CN122106659A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of ventilation and dust removal technology, specifically referring to a ventilation and dust removal device used in coal mine operations. Background Technology
[0002] In coal mining operations, mine tunnels need to be excavated inside the mountain. When coal is mined inside the tunnels, a large amount of fine dust and coal dust is generated. If this dust and coal dust are not removed in time, they are easily inhaled by workers, significantly increasing the risk of pneumoconiosis. Therefore, ventilation and dust removal devices must be provided.
[0003] The existing ventilation and dust removal equipment used in coal mine operations has the following problems: Existing ventilation and dust removal equipment used in coal mine operations can cause dust to be generated inside the tunnel due to the high velocity of the gas discharged from the tunneling area. The dust can quickly spread throughout the tunnel, creating a safety hazard. Furthermore, in the process of using traditional ventilation and dust removal equipment for coal mine operations, dust-laden air is filtered and then circulated into the tunneling area. The airflow near the dust extraction fan is faster and easily carries away the dust that has been deposited on the inner wall of the tunnel, thereby increasing the dust concentration in the tunneling area and increasing the filtration pressure on the filter screen. Therefore, it cannot meet the existing demand for ventilation and dust removal equipment used in coal mine operations. Summary of the Invention
[0004] In response to the above situation and to overcome the shortcomings of the existing technology, this solution provides a ventilation and dust removal device for coal mine operations that can buffer the flow rate of discharged dust-laden gas, reduce the probability of dust generation, and fix the dust deposited on the inner wall of the roadway, preventing the circulating air from carrying the deposited dust into the tunneling area.
[0005] The technical solution adopted in this plan is as follows: This plan proposes a ventilation and dust removal device for coal mine operations, including a fan cylinder, a filter cylinder, a telescopic pipe, a dust-filtering ventilation mechanism, and a slow-speed wall-fixing mechanism. Multiple sets of the telescopic pipes are connected and arranged on the side wall of the fan cylinder, which is open at one end. The filter cylinder is connected and arranged on the side of the telescopic pipe away from the fan cylinder, and is also open at one end. The dust-filtering ventilation mechanism includes a dust-collecting component, a filtering component, a mist-guiding component, and an atomizing component. The dust-collecting component is located inside the fan cylinder. The filtering component is located at the end of the filter cylinder away from the telescopic pipe. The mist-guiding component is located on the side of the filtering component away from the filter cylinder. The atomizing component is located on the side of the mist-guiding component away from the filtering component. The slow-speed wall-fixing mechanism includes a buffer component, a spray component, and a steering component. The buffer component is located on the mist-guiding component. The spray component is located on the side of the atomizing component away from the mist-guiding component. The steering component is located on the filter cylinder.
[0006] As a further preferred embodiment of the present invention, the dust collection assembly includes a dust collection motor, a dust collection shaft, and dust collection fan blades. The dust collection motor is located on the side of the fan cylinder near the filter cylinder. The dust collection shaft is rotatably located on the inner wall of the end of the fan cylinder near the dust collection motor. The output end of the dust collection motor passes through the fan cylinder and is connected to the dust collection shaft. The dust collection fan blades are located on the outside of the dust collection shaft. The filter assembly includes an exhaust disc and an exhaust filter screen. The exhaust disc is rotatably located on the inner wall of the end of the filter cylinder away from the telescopic tube. The exhaust filter screen passes through the exhaust disc. The mist guiding assembly includes a guide cylinder and a guide port. Multiple sets of the guide cylinders are connected and located on the side of the exhaust disc away from the filter cylinder. The guide port is located on the side of the guide cylinder away from the exhaust disc.
[0007] In use, the blower cylinder is installed at the front end of the tunneling equipment, and the filter cylinder is installed at the rear end of the tunneling equipment through the extension of the telescopic pipe. When the tunneling equipment is excavating coal mines, it will generate a large amount of dust. At this time, the output end of the dust suction motor drives the dust suction shaft to rotate, and the dust suction shaft drives the dust suction fan blades to rotate, which draws the dust-laden gas into the blower cylinder. The dust-laden gas enters the filter cylinder through the telescopic pipe, and after being filtered by the exhaust filter screen, it is discharged into the rear of the tunneling equipment.
[0008] Preferably, the atomizing assembly includes an atomizing cylinder, an atomizing motor, and an atomizing disc. The atomizing cylinder is located on the side of the guide cylinder away from the exhaust disc and is open at one end. The atomizing motor is located on the side of the atomizing cylinder away from the guide cylinder, and its output end extends through the interior of the atomizing cylinder. The atomizing disc is rotatably mounted on the inner wall of the opening of the atomizing cylinder. The end of the guide cylinder away from the exhaust disc extends through the inner wall of the atomizing disc, and its guide port communicates with the atomizing cylinder.
[0009] During use, the external water pipe is connected to the water inlet of the atomizing motor. The atomizing motor atomizes the water and delivers it to the inside of the atomizing cylinder. The mist inside the atomizing cylinder enters the guide cylinder through the guide port. The guide cylinder discharges the mist into the filter cylinder. The mist flows with the gas and enters the tunnel behind the tunneling equipment. The filtered air carries the mist, increasing the humidity inside the tunnel and reducing the dust content in the air inside the tunnel.
[0010] Specifically, the buffer assembly includes a buffer piston, a buffer plate, and a buffer spring. The buffer piston is slidably disposed at one end of the guide cylinder near the filter cylinder. The buffer plate is disposed on the side of the buffer piston near the telescopic tube. The buffer spring is disposed between the buffer piston and the inner wall of the guide cylinder, and the buffer spring is in an extended state. The spray assembly includes a pipe clamp, a spray pipe, and a fan-shaped nozzle. Multiple sets of the pipe clamps are disposed on the side wall of the filter cylinder. The spray pipe is disposed between the pipe clamp and the atomizing cylinder, and the spray pipe is connected to the atomizing cylinder. The fan-shaped nozzle is connected to the end of the spray pipe near the pipe clamp. The steering assembly includes a steering motor and a steering shaft. The steering motor is disposed on the side of the filter cylinder near the telescopic tube. The steering shaft passes through the filter cylinder and is disposed between the output end of the steering motor and the exhaust disc.
[0011] In use, the output end of the steering motor drives the exhaust turntable to rotate intermittently through the steering shaft. The exhaust turntable drives the buffer piston to rotate through the guide cylinder. The buffer piston drives the buffer plate to the position opposite to the telescopic pipe. The high-speed flowing dust-laden gas instantly impacts the surface of the buffer plate. Under the elastic deformation of the buffer spring, the buffer plate quickly pushes the buffer piston. The buffer piston squeezes the mist inside the guide cylinder into the atomizing cylinder. At this time, the pressure inside the atomizing cylinder increases instantly, and the mist inside quickly enters the spray pipe. Finally, it is sprayed onto the inner wall of the tunnel through the fan-shaped nozzle. The mist is sprayed directly onto the inner wall of the tunnel, wetting the dust on the wall surface, increasing its stickiness and weight, so that it adheres firmly to the wall surface. This reduces the probability of it being blown up by the wind (secondary dust), purifies the flowing air, and greatly improves the explosion safety of the mine. When the fan-shaped nozzle sprays mist onto the inner wall of the tunnel, the output of the steering motor drives the exhaust turntable to rotate rapidly via the steering shaft. The exhaust turntable drives the exhaust filter to the position opposite the telescopic pipe. Through the circulation, the buffer plate is aligned with the guide cylinder. Using the high-speed flow of dust-laden gas, the buffer piston is intermittently pushed to squeeze and spray out the mist inside the atomizing cylinder. This stabilizes the dust on the inner wall of the tunnel near the dust inlet of the blower, reduces the probability of the fast-flowing air near the dust inlet blowing up the dust deposited on the inner wall of the tunnel, and reduces the filtration pressure of the exhaust filter on the dust. This solves the technical problem of excessive filtration pressure and easy clogging of the filter screen in traditional equipment, and improves the filtration efficiency of dust-laden gas.
[0012] The beneficial effects achieved by this solution using the above structure are as follows: Compared with existing technologies, this solution combines a dust-filtering ventilation mechanism with a slow-speed wall-fixing mechanism. Through the inclusion of dust-collecting, filtering, mist-guiding, atomizing, buffering, spraying, and steering components, the flow rate of the emitted dust-laden gas is buffered, ensuring that dust deposited on the tunnel walls is not blown up again by the filtered air. Furthermore, utilizing the high-speed flow of the dust-laden gas, driven by a steering motor, the high-speed flow of the gas intermittently impacts the buffer plate. This causes the buffer plate to push a buffer piston, compressing the mist inside the atomizing cylinder. The mist is then intermittently sprayed onto the tunnel walls by fan-shaped nozzles. This increases the humidity of the dust on the tunnel walls, ensuring its firm adhesion; it also prevents large amounts of mist from accumulating on the tunnel walls and dripping, which could cause slippery surfaces and lead to safety accidents. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this solution; Figure 2 This is the front perspective stereoscopic view of this solution; Figure 3 This is a schematic diagram of the dust collection component in this solution; Figure 4 This is a schematic diagram of the combined structure of the atomizing component and the spraying component in this solution; Figure 5 This is a schematic diagram of the buffer component in this solution; Figure 6 This is the main view of this solution; Figure 7 This is a side view of the design. Figure 8 This is a top view of the plan; Figure 9 for Figure 8 Sectional view of AA section; Figure 10 for Figure 9 An enlarged structural view of section I.
[0014] Among them, 1. Fan cylinder, 2. Filter cylinder, 3. Telescopic tube, 4. Dust-filtering ventilation mechanism, 5. Dust-collecting assembly, 6. Dust-collecting motor, 7. Dust-collecting shaft, 8. Dust-collecting fan blade, 9. Filter assembly, 10. Exhaust turntable, 11. Exhaust filter screen, 12. Mist guiding assembly, 13. Guide cylinder, 14. Guide port, 15. Atomizing assembly, 16. Atomizing cylinder, 17. Atomizing motor, 18. Atomizing turntable, 19. Slow-moving wall-fixing mechanism, 20. Buffer assembly, 21. Buffer piston, 22. Buffer plate, 23. Buffer spring, 24. Spray assembly, 25. Pipe clamp, 26. Spray pipe, 27. Fan-shaped nozzle, 28. Steering assembly, 29. Steering motor, 30. Steering shaft.
[0015] The accompanying drawings are provided to further understand the present solution and form part of the specification. They are used together with the embodiments of the present solution to explain the present solution and do not constitute a limitation thereof. Detailed Implementation
[0016] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this solution, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this solution without creative effort are within the scope of protection of this solution.
[0017] In the description of this solution, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this solution.
[0018] like Figures 1-10 As shown, this solution proposes a ventilation and dust removal device for coal mine operations, including a fan cylinder 1, a filter cylinder 2, a telescopic pipe 3, a dust-filtering ventilation mechanism 4, and a slow-moving wall-fixing mechanism 19. Multiple sets of the telescopic pipes 3 are connected and disposed on the side wall of the fan cylinder 1, with the fan cylinder 1 open at one end. The filter cylinder 2 is connected and disposed on the side of the telescopic pipe 3 away from the fan cylinder 1, and also has an open end. The dust-filtering ventilation mechanism 4 includes a dust-collecting component 5, a filter component 9, a mist-guiding component 12, and an atomizing component 15. The dust-collecting component 5 is disposed on the side wall of the fan cylinder 1. Inside the cylinder 1, the filter assembly 9 is located at the end of the filter cylinder 2 away from the telescopic tube 3, the mist guiding assembly 12 is located on the side of the filter assembly 9 away from the filter cylinder 2, and the atomizing assembly 15 is located on the side of the mist guiding assembly 12 away from the filter assembly 9. The slow-speed solidification mechanism 19 includes a buffer assembly 20, a spray assembly 24, and a steering assembly 28. The buffer assembly 20 is located on the mist guiding assembly 12, the spray assembly 24 is located on the side of the atomizing assembly 15 away from the mist guiding assembly 12, and the steering assembly 28 is located on the filter cylinder 2.
[0019] The dust collection assembly 5 includes a dust collection motor 6, a dust collection shaft 7, and a dust collection fan blade 8. The dust collection motor 6 is located on the side of the fan cylinder 1 near the filter cylinder 2. The dust collection shaft 7 is rotatably located on the inner wall of the end of the fan cylinder 1 near the dust collection motor 6. The output end of the dust collection motor 6 passes through the fan cylinder 1 and is connected to the dust collection shaft 7. The dust collection fan blade 8 is located on the outside of the dust collection shaft 7. The filter assembly 9 includes an exhaust disc 10 and an exhaust filter screen 11. The exhaust disc 10 is rotatably located on the inner wall of the end of the filter cylinder 2 away from the telescopic tube 3. The exhaust filter screen 11 passes through the exhaust disc 10. The mist guiding assembly 12 includes a guide cylinder 13 and a guide port 14. Multiple sets of the guide cylinders 13 are connected and located on the side of the exhaust disc 10 away from the filter cylinder 2. The guide port 14 is located on the side of the guide cylinder 13 away from the exhaust disc 10.
[0020] The atomizing assembly 15 includes an atomizing cylinder 16, an atomizing motor 17, and an atomizing disc 18. The atomizing cylinder 16 is located on the side of the guide cylinder 13 away from the exhaust disc 10, and the atomizing cylinder 16 is open at one end. The atomizing motor 17 is located on the side of the atomizing cylinder 16 away from the guide cylinder 13, and the output end of the atomizing motor 17 passes through the interior of the atomizing cylinder 16. The atomizing disc 18 is rotatably mounted on the inner wall of the opening of the atomizing cylinder 16. The end of the guide cylinder 13 away from the exhaust disc 10 passes through the inner wall of the atomizing disc 18, and the guide port 14 communicates with the atomizing cylinder 16.
[0021] The buffer assembly 20 includes a buffer piston 21, a buffer plate 22, and a buffer spring 23. The buffer piston 21 is slidably disposed at one end of the guide cylinder 13 near the filter cylinder 2. The buffer plate 22 is disposed on the side of the buffer piston 21 near the telescopic tube 3. The buffer spring 23 is disposed between the buffer piston 21 and the inner wall of the guide cylinder 13, and the buffer spring 23 is in an extended state. The spray assembly 24 includes a pipe clamp 25, a spray pipe 26, and a fan-shaped nozzle 27. Multiple sets of the pipe clamp 25 are disposed on the side wall of the filter cylinder 2. The spray pipe 26 is disposed between the pipe clamp 25 and the atomizing cylinder 16, and the spray pipe 26 is connected to the atomizing cylinder 16. The fan-shaped nozzle 27 is connected to the end of the spray pipe 26 near the pipe clamp 25. The steering assembly 28 includes a steering motor 29 and a steering shaft 30. The steering motor 29 is disposed on the side of the filter cylinder 2 near the telescopic tube 3. The steering shaft 30 passes through the filter cylinder 2 and is disposed between the output end of the steering motor 29 and the exhaust turntable 10.
[0022] In practical use, the blower cylinder 1 is installed at the front end of the tunneling equipment, the telescopic pipe 3 is extended, the filter cylinder 2 is installed at the rear end of the tunneling equipment, and the external water pipe is connected to the water inlet of the atomizing motor 17. The operator controls the atomizing motor 17 to start, and the atomizing motor 17 atomizes the water and delivers it to the atomizing cylinder 16. The mist inside the atomizing cylinder 16 enters the spray pipe 26, and the spray pipe 26 delivers the mist through the fan-shaped nozzle 27 to the inside of the tunnel, reducing the dust content in the air inside the tunnel. During the excavation of coal mines, the tunneling equipment will generate a large amount of dust. At this time, the operator controls the dust suction motor 6 to start. The output end of the dust suction motor 6 drives the dust suction shaft 7 to rotate. The dust suction shaft 7 drives the dust suction fan blade 8 to rotate and suck the dust-laden gas into the blower cylinder 1. The dust-laden gas enters the filter cylinder 2 through the telescopic pipe 3. The operator starts the steering motor 29, and the output of the steering motor 29 quickly drives the exhaust turntable 10 to rotate via the steering shaft 30. The exhaust turntable 10 drives the buffer piston 21 to rotate via the guide cylinder 13. The buffer piston 21 drives the buffer plate 22 to a position opposite to the telescopic tube 3. The high-speed flowing dust-laden gas inside the telescopic tube 3 instantly impacts the surface of the buffer plate 22. Under the elastic deformation of the buffer spring 23, the buffer plate 22 quickly pushes the buffer piston 21. The buffer piston 21 squeezes the mist inside the guide cylinder 13 into the atomizing cylinder 16. At this moment, the pressure inside the atomizing cylinder 16 increases instantaneously, and the mist inside rapidly... The gas enters the interior of the spray pipe 26 and is finally sprayed in a fan shape onto the inner wall of the tunnel through the fan-shaped nozzle 27. This moistens the accumulated dust, increases its stickiness and weight, and makes it firmly adhere to the wall surface. This reduces the probability of the dust being blown up by the airflow (secondary dust) and purifies the flowing air. At the same time, it greatly improves the explosion safety of the mine. After the fan-shaped nozzle 27 sprays mist onto the inner wall of the tunnel, the output end of the steering motor 29 drives the exhaust turntable 10 to rotate rapidly through the steering shaft 30. The exhaust turntable 10 drives the exhaust filter screen 11 to rotate to the position opposite to the air outlet of the telescopic pipe 3. The dust-laden gas enters the tunnel behind the tunneling equipment after being filtered by the exhaust filter screen 11. When the dust-laden gas in the tunneling area is filtered and discharged, the air behind the tunneling equipment flows into the tunneling area, realizing air circulation. The closer the area is to the dust inlet of the blower casing 1, the faster the gas flow rate is accelerated. Therefore, by intermittently driving the buffer plate 22 and the guide cylinder 13 with the steering motor 29, the high-speed flow of dust-laden gas pushes the buffer piston 21 to squeeze and spray out the mist inside the atomizing cylinder 16. This can stabilize the dust on the inner wall of the tunnel that is close to the dust inlet of the blower casing 1, reduce the probability of the fast airflow near the dust inlet of the blower casing 1 blowing up the dust deposited on the inner wall of the tunnel, thereby reducing the filtration pressure of the exhaust filter screen 11 on the dust and improving the filtration efficiency of the dust-laden gas. The above operation can be repeated for the next use.
[0023] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0024] The present solution and its implementation methods have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present solution; the actual structure is not limited to this. In conclusion, if a person skilled in the art, inspired by this description, designs a similar structure and embodiment without departing from the inventive intent of this solution, such design should fall within the protection scope of this solution.
Claims
1. A ventilation and dust removal device for coal mine operations, comprising a fan casing, a filter cartridge, and a telescopic pipe, characterized in that: It also includes a dust-filtering ventilation mechanism and a slow-speed wall-fixing mechanism. Multiple sets of telescopic pipes are connected and installed on the side wall of the fan cylinder. The fan cylinder is open at one end. The filter cylinder is connected and installed on the side of the telescopic pipe away from the fan cylinder, and the filter cylinder is also open at one end. The dust-filtering ventilation mechanism includes a dust-collecting component, a filtering component, a mist-guiding component, and an atomizing component. The dust-collecting component is installed inside the fan cylinder. The filtering component is installed at the end of the filter cylinder away from the telescopic pipe. The mist-guiding component is installed on the side of the filtering component away from the filter cylinder. The atomizing component is installed on the side of the mist-guiding component away from the filtering component. The slow-speed wall-fixing mechanism includes a buffer component, a spray component, and a steering component. The buffer component is installed on the mist-guiding component. The spray component is installed on the side of the atomizing component away from the mist-guiding component. The steering component is installed on the filter cylinder. The fog guiding assembly includes a guide tube; The atomizing component includes an atomizing cartridge; The cushioning assembly includes a cushioning piston, a cushioning plate, and a cushioning spring; The buffer piston is slidably located at one end of the guide cylinder near the filter cylinder, the buffer plate is located on the side of the buffer piston near the telescopic tube, and the buffer spring is located between the buffer piston and the inner wall of the guide cylinder. The spray assembly includes a pipe clamp, a spray tube, and a fan-shaped nozzle; Multiple sets of pipes are clamped on the side wall of the filter cartridge, the spray pipe is located between the pipe clamp and the atomizing cartridge, and the fan-shaped nozzle is connected to the end of the spray pipe near the pipe clamp.
2. The ventilation and dust removal equipment for coal mine operations according to claim 1, characterized in that: The dust collection assembly includes a dust collection motor, a dust collection shaft, and dust collection fan blades. The dust collection motor is located on the side of the fan cylinder near the filter cylinder. The dust collection shaft is rotatably located on the inner wall of the fan cylinder near the dust collection motor. The output end of the dust collection motor passes through the fan cylinder and is connected to the dust collection shaft. The dust collection fan blades are located on the outside of the dust collection shaft.
3. A ventilation and dust removal device for coal mine operations according to claim 1, characterized in that: The filter assembly includes an exhaust disc and an exhaust filter screen. The exhaust disc is rotatably mounted on the inner wall of the filter cylinder at the end away from the telescopic tube, and the exhaust filter screen is disposed through the exhaust disc.
4. A ventilation and dust removal device for coal mine operations according to claim 3, characterized in that: The mist guiding assembly also includes a guide port, and multiple sets of the guide cylinders are connected and disposed on the side of the exhaust disc away from the filter cylinder, with the guide port disposed on the side of the guide cylinder away from the exhaust disc.
5. A ventilation and dust removal device for coal mine operations according to claim 4, characterized in that: The atomizing assembly also includes an atomizing motor and an atomizing disc. The atomizing cylinder is located on the side of the guide cylinder away from the exhaust disc, and the atomizing cylinder is open at one end. The atomizing motor is located on the side of the atomizing cylinder away from the guide cylinder, and the output end of the atomizing motor passes through the interior of the atomizing cylinder. The atomizing disc is rotatably mounted on the inner wall of the opening of the atomizing cylinder. The end of the guide cylinder away from the exhaust disc passes through the inner wall of the atomizing disc, and the guide port is connected to the atomizing cylinder.
6. A ventilation and dust removal device for coal mine operations according to claim 1, characterized in that: The buffer spring is in an extended state.
7. A ventilation and dust removal device for coal mine operations according to claim 1, characterized in that: The spray pipe is connected to the atomizing cylinder.
8. A ventilation and dust removal device for coal mine operations according to claim 3, characterized in that: The steering assembly includes a steering motor and a steering shaft. The steering motor is located on the side of the filter cylinder near the telescopic tube, and the steering shaft passes through the filter cylinder and is located between the output end of the steering motor and the exhaust disc.