A pipe cleaning and disinfection robot

Abstract

This invention discloses a pipe cleaning and disinfection robot, belonging to the field of pipe cleaning. The device includes: a moving mechanism comprising a mobile carrier on which a robotic arm is mounted; a dust-cleaning mechanism comprising a dust-raising component mounted on the robotic arm, the dust-raising component having a sweeping part; a dust-collecting component mounted on the mobile carrier, the dust-collecting component having an exhaust port; and a sealing mechanism mounted on the dust-raising component. When the sweeping part contacts the inner wall of the pipe to perform dust cleaning, the sealing mechanism and the inner wall of the pipe form a dust-sealing chamber. The sweeping part on the dust-raising component cleans the dust area to raise the dust, making it difficult for the dust to escape from the dust-sealing chamber. At this time, the exhaust port continuously generates suction to collect the dust raised in the dust-sealing chamber, thereby effectively improving the dust collection efficiency, preventing the raised dust from spreading inside the pipe and affecting the dust collection effect, and improving the subsequent pipe disinfection effect.

Description

Technical Field

[0001] This invention relates to the field of pipeline cleaning technology, and in particular to a pipeline cleaning and disinfection robot. Background Technology

[0002] In central air conditioning or fresh air systems, ventilation ducts accumulate a large amount of complex pollutants, including dust, organic debris, and microorganisms, over time. These accumulations not only reduce the effective flow area of ​​the ducts and increase system ventilation resistance and energy consumption, but also become a source of pollutant storage and diffusion. Under airflow disturbances, dust or impurities in the ventilation ducts can enter the room and affect people's respiratory health. Therefore, ventilation ducts need to be cleaned and disinfected regularly.

[0003] Currently, most existing pipe cleaning robots use rotating brushes combined with negative pressure vacuuming. However, existing equipment has significant drawbacks when cleaning ventilation ducts: when the brush head cleans the inner wall of the duct, it raises a large amount of dust. This dust easily spreads within the duct, causing secondary pollution. Although some devices are equipped with suction ports, their suction effectiveness is limited. When cleaning larger ducts, the dust spreads over a wide area, making it difficult for the suction ports to fully extract the dust. When cleaning smaller ducts, the dust spreads rapidly, easily covering the camera and obstructing its view, affecting the accuracy of remote operation.

[0004] For the disinfection process, existing equipment often sprays disinfectant directly after cleaning. However, if dust is not effectively controlled, suspended dust particles can hinder the full contact between disinfectant droplets and the pipe surface, and adsorb a large amount of disinfectant components, affecting the disinfection effect. Summary of the Invention

[0005] The purpose of this invention is to provide a pipe cleaning and disinfection robot and a recycling process to solve the problem that existing pipe cleaning robots can easily cause secondary pollution by spreading dust inside the pipe during cleaning.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution: A pipeline cleaning and disinfection robot includes: a mobile mechanism comprising a mobile carrier on which a robotic arm is mounted; a dust-cleaning mechanism comprising a dust-raising component mounted on the robotic arm, the dust-raising component having a dust-sweeping part, a dust-collecting component mounted on the mobile carrier, the dust-collecting component having an exhaust port; a sealing mechanism mounted on the dust-raising component, wherein when the dust-sweeping part contacts the inner wall of the pipeline for dust cleaning, the sealing mechanism and the inner wall of the pipeline form a dust-sealing cavity, the exhaust port being located within the dust-sealing cavity; and a disinfection mechanism mounted on the mobile carrier for disinfecting the portion of the pipeline that has been cleaned.

[0007] Furthermore, the dust-generating component includes a mounting base mounted on the robotic arm, a driving component mounted on the mounting base, a dust-generating brush detachably mounted on the driving component, the dust-generating brush being driven to rotate by the driving component, and a sealing mechanism mounted on the mounting base.

[0008] Furthermore, the dust extraction component includes an exhaust pipe installed on the mobile carrier, one end of the exhaust pipe is connected to an external exhaust component, the mounting base has an internal air cavity, one end of the exhaust pipe is connected to the air cavity, and a plurality of suction pipes are connected in a circular array on the outer periphery of the mounting base, all of which are located inside the dust sealing cavity.

[0009] Furthermore, the sealing mechanism includes a mounting plate installed on the mounting base, on which a plurality of elastic telescopic elements are mounted in a circular array, and the plurality of elastic telescopic elements form a dust sealing cavity with the inner wall of the pipe.

[0010] Furthermore, the elastic telescopic member includes a mounting cylinder mounted on the mounting plate, a plug rod slidably inserted into the mounting cylinder, an abutment spring installed between the plug rod and the mounting cylinder, and an abutment cylinder slidably fitted onto the mounting cylinder at the free end of the plug rod, with adjacent abutment cylinders being tangent to each other.

[0011] Furthermore, the free end of the contact cylinder is hemispherical.

[0012] Furthermore, a sealing element is provided between adjacent mounting cylinders. One end of the sealing element is connected to the mounting plate, and the other end is connected to the end of the corresponding two contact cylinders near the mounting plate. Both sides of the sealing element are respectively in contact with the two mounting cylinders. When the contact cylinders move along the axial direction of the mounting cylinders, the sealing element adaptively extends or retracts.

[0013] Furthermore, the sealing component includes two mutually fitting compression components. The top end of the compression component is connected to the end of the contact cylinder away from the mounting plate, and the bottom end of the compression component is connected to the mounting plate. The sides of the two compression components that are far apart from each other are respectively fitted to the outer periphery of the mounting cylinder. The compression component is hollow and thin-walled, and both sides of the compression component facing the periphery of the mounting plate are corrugated.

[0014] Furthermore, the disinfection mechanism includes a disinfection box installed on the mobile carrier, a movable frame vertically slidably mounted on the mobile carrier, a rotating nozzle mounted on the movable frame, multiple movable blocks horizontally slidably mounted on the mobile carrier, connecting rods hinged to the movable blocks, the free ends of two connecting rods being hinged to the movable frame, an adjusting screw horizontally and rotatably mounted on the mobile carrier, one of the movable blocks being threaded onto the adjusting screw, and the rotating nozzle being connected to the disinfection box via a pipe.

[0015] Furthermore, the driving component includes an internally threaded cylinder coaxially rotatably mounted on the mounting base, the dust brush being threaded onto the internally threaded cylinder, a drive motor being mounted on the mounting base, and a bevel gear assembly being installed between the drive motor and the internally threaded cylinder.

[0016] The beneficial effects of this invention are: The sealing mechanism of this invention forms a dust-sealing chamber with the inner wall of the pipe. The dust-sweeping part on the dust-raising component sweeps the dust area to raise the dust, making it difficult for the dust to drift out of the dust-sealing chamber. At this time, the exhaust port continuously generates suction to collect the dust raised in the dust-sealing chamber, thereby effectively improving the efficiency of dust collection, preventing the raised dust from spreading inside the pipe and affecting the dust collection effect, and improving the subsequent disinfection effect of the pipe. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 For the present invention Figure 2 Partial three-dimensional sectional view; Figure 4 This is a diagram illustrating the structure of the sealing mechanism of the present invention; Figure 5 For the present invention Figure 4 Partial 1 three-dimensional sectional view; Figure 6 For the present invention Figure 4 Another perspective illustration; Figure 7 This is a diagram illustrating the structure of the elastic telescopic component of the present invention; Figure 8 For the present invention Figure 7 Partial three-dimensional sectional view; Figure 9 For the present invention Figure 7 Another partial three-dimensional sectional view.

[0018] Explanation of reference numerals in the attached figures: 1. Moving mechanism; 101. Mobile carrier; 102. Robotic arm; 2. Dust removal mechanism; 201. Dust-generating component; 2011. Mounting base; 2012. Dust-generating brush; 202. Dust extraction component; 2021. Exhaust duct; 2022. Air chamber; 2023. Suction pipe; 3. Sealing mechanism; 301. Mounting plate; 302. Elastic telescopic component; 3021. Mounting cylinder; 3022. Connecting rod; 3023. Contact spring 3024, Contact cylinder; 4, Disinfection mechanism; 401, Disinfection box; 402, Moving frame; 403, Rotating nozzle; 404, Moving block; 405, Linking rod; 406, Adjusting screw; 5, Driving component; 501, Internal threaded cylinder; 502, Drive motor; 503, Bevel gear assembly; 6, Sealing component; 601, Compression component; 7, Frame; 8, Camera; 9, Illumination lamp; 10, Carrier; 11, Track. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] like Figures 1 to 9 As shown in the figure, an embodiment of the present invention provides a pipeline cleaning and disinfection robot, comprising: The mobile mechanism 1 includes a mobile carrier 101, on which a robotic arm 102 is mounted. It should be noted that this application does not impose specific limitations on the structure of the mobile carrier 10, which can be any mobile carrier 10 capable of moving inside the pipeline. In this embodiment, the mobile carrier 101 includes a carrier 10 and two tracks 11 mounted on the carrier 10. The tracks 11 are electrically driven, and the operator can remotely drive the movement of the carrier 10 from outside the pipeline via the tracks 11. The tracks 11, as the driving force of the mobile carrier 10, can effectively ensure the stability of the carrier 10 when moving inside the pipeline. A camera 8 is mounted on the carrier 10 via a frame 7, and an illumination lamp 9 is also mounted on the frame 7 to facilitate the operator's observation of the inside of the pipeline. The dust removal mechanism 2 includes a dust-raising component 201 mounted on the robotic arm 102. The dust-raising component 201 has a dust-sweeping part. A dust-collecting component 202 is mounted on the mobile carrier 101. The dust-collecting component 202 has an exhaust port. In other words, the dust-raising component 201 can sweep the area where dust adheres to the inner wall of the pipe, so that the dust on the inner wall of the pipe is raised. During this process, the dust-collecting component 202 is in the activated state so that the exhaust port generates suction, thereby collecting the raised dust. The sealing mechanism 3 is installed on the dust-raising component 201. When the dust-sweeping part contacts the inner wall of the pipe to sweep away dust, the sealing mechanism 3 and the inner wall of the pipe form a dust-sealing chamber. The exhaust port is located inside the dust-sealing chamber. That is, when the camera 8 confirms the dust area of ​​the pipe, the dust-raising component 201 on the robotic arm 102 is brought closer to the dust area by the robotic arm 102, so that the sealing mechanism 3 is also brought closer to the dust area. When the dust-sweeping part contacts the dust area, the sealing mechanism 3 also covers the dust area of ​​the pipe, thus forming a dust-sealing chamber with the inner wall of the pipe. Then the dust-sweeping part on the dust-raising component 201 sweeps the dust area to raise the dust. Because the raised dust is covered by the sealing mechanism 3, the dust is not easy to drift out of the dust-sealing chamber. At this time, the exhaust port continuously generates suction to collect the dust raised in the dust-sealing chamber, thereby effectively improving the efficiency of dust collection and preventing the raised dust from spreading inside the pipe and affecting the dust collection effect.

[0021] In this embodiment, the sealing mechanism 3 can be an open end and a cover that can fit against the inner wall of the pipe; The disinfection mechanism 4, installed on the mobile carrier 101, is used to disinfect the part of the pipeline that has been cleaned. After the dust raised inside the pipeline is collected, the disinfection mechanism 4 continuously sprays disinfectant on the inner wall of the pipeline as the mobile carrier 101 continues to move, avoiding contact between the disinfectant and a large amount of dust, which would affect the disinfection effect. In this embodiment, in order to further improve the disinfection effect of the disinfection mechanism 4, the disinfection mechanism 4 includes a disinfection box 401 installed on the mobile carrier 101. A mobile frame 402 is vertically slidably installed on the mobile carrier 101. A rotating nozzle 403 is installed on the mobile frame 402. The rotating nozzle 403 is connected to the disinfection box 401 through a pipeline. Multiple moving blocks 404 are horizontally slidably installed on the mobile carrier 101. A connecting rod 405 is hinged to the moving block 404. The free ends of two connecting rods 405 are both hinged to the moving frame 401. On the mobile carrier 101, an adjusting screw 406 is horizontally and rotatably mounted. One of the moving blocks 404 is threaded onto the adjusting screw 406. It should be noted that the rotating nozzle 403 is connected to the disinfection box 401 via a flexible hose. Before moving the mobile carrier 10 into the pipe, the adjusting screw 406 can be rotated according to the inner diameter of the pipe to be cleaned. The rotation of the adjusting screw 406 drives one of the moving blocks 404 to move. When the moving block 404 moves, it forces the moving frame 402 to move vertically through the hinge rod, thereby indirectly causing the position of the rotating nozzle 403 to change, so that the rotation axis of the rotating nozzle 403 is closer to the pipe axis. In this way, when the rotating nozzle 403 rotates, the disinfectant can be sprayed evenly on the inner wall of the pipe. When cleaning pipes with different inner diameters, the disinfection effect of the pipe can be guaranteed.

[0022] like Figures 4 to 6As shown, in some embodiments, the dust-raising component 201 includes a mounting base 2011 mounted on the robotic arm 102. A driving component 5 is mounted on the mounting base 2011, and a dust-raising brush 2012 is detachably mounted on the driving component 5. The driving component 5 drives the dust-raising brush 2012 to rotate. The sealing mechanism 3 is mounted on the mounting base 2011. That is, the driving component 5 drives the dust-raising brush 2012 to rotate continuously, so that the bristles on the dust-raising brush 2012 continuously brush the dust on the inner wall of the pipe, thereby raising the dust on the pipe. Specifically, the dust-raising brush 2012 has a disc on which bristles are evenly distributed.

[0023] When the dust brush 2012 ages after a period of use, in order to facilitate the replacement of the dust brush 2012, the drive component 5 includes an internally threaded cylinder 501 coaxially rotatably mounted on the mounting base 2011. The dust brush 2012 is threaded onto the internally threaded cylinder 501. A drive motor 502 is mounted on the mounting base 2011. A bevel gear assembly 503 is installed between the drive motor 502 and the internally threaded cylinder 501, as shown in Figure 6. A bevel gear disc is mounted on the threaded cylinder, and a bevel gear that meshes with the bevel gear is mounted on the output shaft of the drive motor 502, so that the drive motor 502 rotates and drives the internally threaded cylinder 501 to rotate. A screw is installed at the end of the dust brush 2012 away from the disc. The screw is screwed into the internally threaded cylinder 501 to facilitate the replacement of the dust brush 2012 later. The internally threaded cylinder 501 then drives the dust brush 2012 to rotate, so as to achieve the purpose of dust removal.

[0024] like Figures 4 to 6 As shown, in some embodiments, the dust extraction component 202 includes an exhaust pipe 2021 mounted on the movable carrier 101. One end of the exhaust pipe 2021 is externally connected to an exhaust fan. The mounting base 2011 has an internal air chamber 2022. One end of the exhaust pipe 2021 communicates with the air chamber 2022. A plurality of suction pipes 2023 are connected in a circular array on the outer periphery of the mounting base 2011. All of the suction pipes 2023 are located within the dust sealing chamber. It should be noted that this application does not impose any limitations on the exhaust component; it can be any component capable of supplying air to the dust collector. The exhaust duct 2021 provides a suction structure with sufficient suction power. Preferably, the exhaust duct 2021 is connected to a flexible duct. The free end of the flexible duct is located outside the pipe and connected to a negative pressure dust collector. The negative pressure dust collector provides suction power to the exhaust duct 2021. Because the exhaust duct 2021 is connected to the air chamber 2022, and multiple suction pipes 2023 are also connected to the air chamber 2022, the multiple suction pipes 2023 will generate suction power, thereby meeting the dust collection needs. The multiple suction pipes 2023 are arranged in a circular pattern, which effectively improves the dust collection efficiency.

[0025] like Figure 5As shown, in some embodiments, the sealing mechanism 3 includes a mounting plate 301 mounted on the mounting base 2011. Multiple elastic telescopic members 302 are mounted in a circular array on the mounting plate 301. The multiple elastic telescopic members 302 form a dust sealing cavity with the inner wall of the pipe. That is, when dealing with dust from pipes of different inner diameters, the free ends of the multiple elastic telescopic members 302 will adaptively conform to the pipe according to the curvature of the inner wall of the pipe until they come into contact with the dust area of ​​the pipe and the dust brush 2012, which effectively improves the adaptability of the sealing mechanism 3.

[0026] like Figures 5 to 8 As shown, in some embodiments, the elastic telescopic member 302 includes a mounting cylinder 3021 mounted on a mounting plate 301. A connecting rod 3022 is slidably inserted into the mounting cylinder 3021. An abutment spring 3023 is installed between the connecting rod 3022 and the mounting cylinder 3021. An abutment cylinder 3024, which is slidably fitted onto the mounting cylinder 3021, is mounted on the free end of the connecting rod 3022. Adjacent abutment cylinders 3024 are tangent to each other, meaning that the peripheries of adjacent abutment cylinders 3024 are in contact with each other. It should be noted that in this embodiment, the gap between the mounting cylinders 3021 is as small as possible to prevent excessive dust from drifting out from the gap between the mounting cylinders 3021. When the dust brush 2012 comes into contact with the dust on the inner wall, the abutment cylinder 3024 will also be in contact with the inner wall of the pipe. The contact cylinder 3024 will adaptively contact the pipe. Under the action of the contact spring 3023, it ensures that the contact cylinder 3024 will not detach from the inner wall of the pipe and cause dust to float out when the dust brush 2012 rotates. When the dust brush 2012 rotates and raises the dust, because the gap between the adjacent mounting cylinders 3021 is small and the multiple suction pipes 2023 are in the dust suction state at this time, it can also effectively prevent the raised dust from floating in the pipe. In order to further reduce the gap between the contact cylinder 3024 and the inner wall of the pipe, the free end of the contact cylinder 3024 is hemispherical. When the robotic arm 102 moves circumferentially in the pipe, the hemispherical design at the end effectively reduces the friction between it and the pipe. Preferably, the hemispherical area of ​​the free end of the contact cylinder 3024 can be replaced with a rotating ball to further reduce the friction between it and the pipe.

[0027] like Figures 5 to 9 As shown, in some embodiments, a sealing member 6 is provided between adjacent mounting cylinders 3021. One end of the sealing member 6 is connected to the mounting plate 301, and the other end is connected to the end of the corresponding two contact cylinders 3024 near the mounting plate 301. The two sides of the sealing member 6 are respectively attached to the two mounting cylinders 3021. When the contact cylinders 3024 move along the axial direction of the mounting cylinders 3021, the sealing member 6 extends or contracts adaptively. The design of the sealing member 6 can further reduce the gap between adjacent mounting cylinders 3021 to further improve the dust extraction efficiency, and does not affect the formation of dust cavities with pipes of different inner diameters.

[0028] like Figures 7 to 9 As shown, in some embodiments, the sealing member 6 includes two mutually fitting compression members 601. The top end of the compression member 601 is connected to the end of the contact cylinder 3024 away from the mounting plate 301, and the bottom end of the compression member 601 is connected to the mounting plate 301. The sides of the two compression members 601 that are far apart from each other are respectively fitted to the outer periphery of the mounting cylinder 3021. The compression member 601 is hollow and thin-walled. Both sides of the compression member 601 facing the periphery of the mounting plate 301 are corrugated. Preferably, the compression member 601 can be made of rubber, which has good elastic deformation characteristics, such as... Figure 8 As shown, when the contact cylinder 3024 moves, the contact cylinder 3024 and the mounting plate 301 will squeeze the compression component 601. Because of the corrugated design of the compression component 601, the compression component 601 will extend towards the axis of the mounting plate 301 during the compression process. During the compression process, because one side of the compression component 601 is in contact with another compression component 601 and the other side is in contact with the corresponding mounting cylinder 3021, the more the compression component 601 is squeezed, the tighter the compression component 601 and the mounting cylinder 3021 are in contact, which further improves the efficiency of dust collection inside the dust sealing chamber.

[0029] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A pipe cleaning and disinfection robot, characterized in that, include: The mobile mechanism (1) includes a mobile carrier (101) on which a robotic arm (102) is mounted. The dust removal mechanism (2) includes a dust-raising component (201) mounted on the robotic arm (102), the dust-raising component (201) having a dust-sweeping part, and a dust-collecting component (202) mounted on the mobile carrier (101), the dust-collecting component (202) having an exhaust port; The sealing mechanism (3) is installed on the dust-generating component (201). When the dust-sweeping part contacts the inner wall of the pipe to sweep dust, the sealing mechanism (3) and the inner wall of the pipe form a dust-sealing cavity, and the exhaust port is located in the dust-sealing cavity. The disinfection mechanism (4) is installed on the mobile carrier (101) and is used to disinfect the part of the pipeline that has been cleaned.

2. The pipeline cleaning and disinfection robot as described in claim 1, characterized in that, The dust-raising component (201) includes a mounting base (2011) mounted on the robotic arm (102), a drive component (5) mounted on the mounting base (2011), a dust-raising brush (2012) detachably mounted on the drive component (5), the dust-raising brush (2012) is driven to rotate by the drive component (5), and a sealing mechanism (3) is mounted on the mounting base (2011).

3. The pipeline cleaning and disinfection robot as described in claim 2, characterized in that, The dust extraction component (202) includes an exhaust pipe (2021) installed on the mobile carrier (101). One end of the exhaust pipe (2021) is connected to an external exhaust component. The mounting base (2011) has an internal air chamber (2022). One end of the exhaust pipe (2021) is connected to the air chamber (2022). A plurality of suction pipes (2023) are connected in a circular array on the outer periphery of the mounting base (2011). All of the suction pipes (2023) are located inside the dust sealing chamber.

4. The pipeline cleaning and disinfection robot as described in claim 3, characterized in that, The sealing mechanism (3) includes a mounting plate (301) mounted on the mounting base (2011), and a plurality of elastic telescopic members (302) are mounted in a circular array on the mounting plate (301). The plurality of elastic telescopic members (302) form a dust sealing cavity with the inner wall of the pipe.

5. A pipeline cleaning and disinfection robot as described in claim 4, characterized in that, The elastic telescopic component (302) includes a mounting cylinder (3021) mounted on the mounting plate (301), a plug rod (3022) is slidably inserted into the mounting cylinder (3021), an abutment spring (3023) is installed between the plug rod (3022) and the mounting cylinder (3021), and an abutment cylinder (3024) is slidably fitted on the mounting cylinder (3021) at the free end of the plug rod (3022), with adjacent abutment cylinders (3024) being tangent to each other.

6. The pipeline cleaning and disinfection robot as described in claim 5, characterized in that, The free end of the contact tube (3024) is hemispherical.

7. A pipeline cleaning and disinfection robot as described in claim 5, characterized in that, A sealing element (6) is provided between adjacent mounting cylinders (3021). One end of the sealing element (6) is connected to the mounting plate (301), and the other end is connected to the end of the corresponding two contact cylinders (3024) near the mounting plate (301). The two sides of the sealing element (6) are respectively attached to the two mounting cylinders (3021). When the contact cylinder (3024) moves along the axial direction of the mounting cylinder (3021), the sealing element (6) extends or contracts adaptively.

8. A pipeline cleaning and disinfection robot as described in claim 7, characterized in that, The sealing component (6) includes two mutually fitting compression components (601). The top end of the compression component (601) is connected to the end of the contact cylinder (3024) away from the mounting plate (301), and the bottom end of the compression component (601) is connected to the mounting plate (301). The sides of the two compression components (601) that are far from each other are respectively fitted to the outer periphery of the mounting cylinder (3021). The compression component (601) is hollow and thin-walled. Both sides of the compression component (601) facing the periphery of the mounting plate (301) are corrugated.

9. A pipeline cleaning and disinfection robot as described in claim 1, characterized in that, The disinfection mechanism (4) includes a disinfection box (401) installed on the mobile carrier (101), a mobile frame (402) is vertically slidably installed on the mobile carrier (101), a rotating nozzle (403) is installed on the mobile frame (402), a plurality of moving blocks (404) are horizontally slidably installed on the mobile carrier (101), a connecting rod (405) is hinged on the moving block (404), the free ends of the two connecting rods (405) are both hinged on the mobile frame (402), an adjusting screw (406) is horizontally and rotatably installed on the mobile carrier (101), one of the moving blocks (404) is threaded onto the adjusting screw (406), and the rotating nozzle (403) is connected to the disinfection box (401) through a pipe.

10. A pipeline cleaning and disinfection robot as described in claim 2, characterized in that, The drive component (5) includes an internally threaded cylinder (501) coaxially rotatably mounted on the mounting base (2011), the dust brush (2012) is threaded onto the internally threaded cylinder (501), a drive motor (502) is mounted on the mounting base (2011), and a bevel gear assembly (503) is installed between the drive motor (502) and the internally threaded cylinder (501).

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