Double-chamber industrial dust collector for photovoltaic module production

Abstract

The invention belongs to the technical field of dust removal, and particularly relates to a double-chamber industrial dust collector for photovoltaic module production, which comprises a dust removal box, two chambers I are arranged in the dust removal box, chambers II are arranged above the two chambers I, a same chamber III is arranged above the two chambers II, a chamber IV is arranged above the chamber III, and the chamber IV is arranged above the chamber III. A first partition plate is arranged between the two first cavities, a second partition plate is arranged between the two second cavities, second flow dividing mechanisms are arranged in the two second cavities, the tops of the two second flow dividing mechanisms are fixedly connected with the inner wall of the bottom of the third cavity, and the second cavities can communicate with the third cavity through the second flow dividing mechanisms in the open state. By means of the filtering mode of the cavities on the two sides, when the filtering cavity on one side is cleaned and dredged, dust in the filtering cavity on the other side can be filtered, it is guaranteed that dust absorption can be conducted continuously when the series welding machine works, and it is guaranteed that continuous work of the series welding machine is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal, and particularly relates to a double-chamber industrial dust collector for photovoltaic module production. Background Art

[0002] The string welding machine is one of the core devices in the traditional photovoltaic module production process. It is a device that connects individual solar cells into a battery string through interconnection bars. The automatic feeding mechanism, the welding tape automatically runs to the main machine for processing and welding, the welding tape processing mechanism, the welding tape is coated with flux and automatically cut off. It is mainly used for the series welding of single-crystal and polycrystalline solar cells in fully automatic crystalline silicon solar cell modules, and is suitable for the series welding of crystalline silicon solar cells. During the welding process, a large amount of welding fumes are generated, and the welding dust contains a large amount of harmful particulate matter. Long-term inhalation of high-concentration welding dust will cause welding-related occupational diseases represented by pneumoconiosis.

[0003] In the prior art, for the treatment method of welding dust generated during the working process, it is usually adopted to collect and discharge dust centrally by an exhaust fan through a ventilation port. When the existing dust removal equipment needs to be cleaned, the dust removal equipment needs to be shut down. However, the string welding machine cannot be easily shut down during the working process. Therefore, a double-chamber industrial dust collector for photovoltaic module production is proposed. Summary of the Invention

[0004] In order to solve the defects existing in the prior art, the present invention proposes a double-chamber industrial dust collector for photovoltaic module production.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: A double-chamber industrial dust collector for photovoltaic module production, including a dust removal box. Two chambers one are arranged inside the dust removal box. Chambers two are arranged above the two chambers one. A chamber three is arranged above the two chambers two. A chamber four is arranged above the chamber three. A partition two is arranged between the two chambers one and between the two chambers two. Shunt mechanisms two are arranged inside the two chambers two. The tops of the two shunt mechanisms two are fixedly connected to the inner wall of the bottom of the chamber three. The chamber two can be communicated with the chamber three through the shunt mechanism two in the open state. A negative pressure fan is fixedly installed on the inner wall of the bottom of the chamber four. The air inlet of the negative pressure fan is communicated with the chamber three. An exhaust port is arranged on the inner wall of the top of the chamber four. A partition one is arranged between the chamber two and the chamber one on the same side. Two filter cartridges are fixedly installed at the bottom of the partition one. An anti-blowing mechanism for dredging the two filter cartridges is installed on the top of the partition one. Two shunt mechanisms one are arranged on the outside of the dust removal box. A tee pipe is arranged on the two shunt mechanisms one. The tee pipe can be communicated with the corresponding chamber one through the shunt mechanism one in the open state.

[0006] Preferably, the bottoms of both of the first chambers are open, and ash hoppers are detachably installed at the bottoms of both of the first chambers. A first bin door is provided on one side of the first chamber, and a second bin door is provided on the same side of the two second chambers.

[0007] Preferably, the first flow splitting mechanism includes a rectangular box fixedly connected to the outside of the dust removal box. An air inlet and an air outlet are provided on the rectangular box. The air outlet is communicated with the first chamber. A first valve plate is rotatably installed in the rectangular box. A first pneumatic actuator is fixedly installed on the outside of the rectangular box. A first transmission shaft is provided on the first pneumatic actuator. The first transmission shaft penetrates through the rectangular box and is rotatably connected to the rectangular box, and the first transmission shaft penetrates through the first valve plate and is fixedly connected to the first valve plate. A baffle is provided on one side inside the rectangular box. The tee pipe is provided with an inlet and two outlets, and the two outlets are respectively communicated with the air inlets on the corresponding first flow splitting mechanisms.

[0008] Preferably, the second flow splitting mechanism includes a rectangular air duct. A second valve plate is rotatably installed in the rectangular air duct. A second pneumatic actuator is fixedly installed on the outside of the rectangular air duct. A second transmission shaft is provided on the second pneumatic actuator. The second transmission shaft penetrates through the rectangular air duct and is rotatably connected to the rectangular air duct, and the second transmission shaft penetrates through the second valve plate and is fixedly connected to the second valve plate.

[0009] Preferably, two circular openings are formed in the first partition plate. The top of the filter cylinder is open, and the open sides of the tops of the two filter cylinders are fixedly connected to the bottom of the first partition plate, and the two filter cylinders are coaxially arranged with the corresponding circular openings respectively. The back blowing mechanism includes a compressed air tank fixedly installed on the top of the first partition plate. Two connecting pipes are provided on the compressed air tank. Pulse switch air valves and nozzles are provided on the connecting pipes. The nozzles are located above the circular openings and are coaxially arranged with the circular openings.

[0010] Preferably, a cleaning mechanism is sleeved outside the filter cylinder. The cleaning mechanism includes a plurality of annular brushes slidably sleeved outside the filter cylinder. The plurality of annular brushes are linearly distributed. A plurality of annular brushes are fixedly installed on the outside of the annular brush. A plurality of guide rods are provided on the outside of the plurality of annular brushes in a circumferential array. The plurality of guide rods respectively penetrate through the corresponding connecting ears and are slidably connected to the corresponding connecting ears, and the tops of the plurality of guide rods are fixedly connected to the bottom of the first partition plate. The bottoms of the plurality of guide rods are fixedly installed with the same annular plate.

[0011] Preferably, springs are slidably sleeved on the plurality of guide rods. The bottom ends of the springs are fixedly connected to the top of the annular plate, and the top ends of the springs are fixedly connected to the corresponding connecting ears.

[0012] Preferably, a plurality of sleeves are slidably sleeved on the guide rod, and both ends of the plurality of sleeves are fixedly connected to the corresponding connecting ears. A plurality of sector-shaped ring plates distributed in a circumferential array are fixedly installed on the outer side of the annular brush, and the plurality of sector-shaped ring plates and the plurality of connecting ears are staggered.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. Through the filtering method of the double-chamber, when one of the filtering chambers is cleaned and dredged, the dust in the other filtering chamber can be filtered, ensuring that the dust absorption during the operation of the string welding machine can be carried out continuously without interruption, and ensuring that the continuous operation of the string welding machine is not affected;

[0015] 2. Through the cooperation of the back-blowing mechanism and the cleaning mechanism, therefore, when the compressed air is used to back-blow and dredge the cleaning mechanism from the inside to the outside, in addition, the ejected compressed air can also provide power for the operation of the cleaning mechanism, enabling the cleaning mechanism to clean the outside of the filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic diagram of the overall structure of a double-chamber industrial dust collector for photovoltaic module production proposed by the present invention Figure 1 ;

[0017] Figure 2 FIG. is a schematic diagram of the overall structure of a double-chamber industrial dust collector for photovoltaic module production proposed by the present invention Figure 2 ;

[0018] Figure 3 FIG. is a side sectional view of a double-chamber industrial dust collector for photovoltaic module production proposed by the present invention;

[0019] Figure 4 FIG. is a side sectional view of the first flow splitting mechanism in a double-chamber industrial dust collector for photovoltaic module production proposed by the present invention;

[0020] Figure 5 FIG. is a side sectional view of the second flow splitting mechanism in a double-chamber industrial dust collector for photovoltaic module production proposed by the present invention;

[0021] Figure 6 FIG. is a schematic diagram of the structure of the first partition board, the back-blowing mechanism, two filter cartridges and two cleaning mechanisms in a double-chamber industrial dust collector for photovoltaic module production proposed by the present invention;

[0022] Figure 7 FIG. is a schematic diagram of the structure of the cleaning mechanism in a double-chamber industrial dust collector for photovoltaic module production proposed by the present invention.

[0023] In the figure: 1. Dust removal box; 11. Chamber one; 12. Chamber two; 13. Chamber three; 14. Chamber four; 15. Air outlet; 16. Partition one; 161. Round opening; 17. Warehouse door one; 18. Warehouse door two; 19. Partition two; 2. Three-way pipe; 21. Inlet; 22. Outlet; 3. Shunt mechanism one; 31. Rectangular box; 32. Air inlet; 33. Air outlet; 34. Baffle; 35. Pneumatic actuator one; 351. Transmission shaft one; 36. Valve plate one; 4. Filter cartridge; 5. Cleaning mechanism; 51. Ring brush; 52. Connecting ear; 53. Guide rod; 54. Ring plate; 55. Spring; 56. Sleeve; 57. Sector ring plate; 6. Backwashing mechanism; 61. Compressed air tank; 62. Connecting pipe; 63. Nozzle; 64. Pulse switch air valve; 7. Shunt mechanism two; 71. Rectangular air duct; 72. Pneumatic actuator two; 721. Transmission shaft two; 73. Valve plate two; 8. Negative pressure fan; 9. Ash hopper. Detailed implementation manners

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-7 , the present invention provides a technical solution: a double-chamber industrial dust collector for photovoltaic module production, including a dust removal box 1. There are two chambers one 11 inside the dust removal box 1. Above the two chambers one 11, there are chambers two 12. Above the two chambers two 12, there is a same chamber three 13. Above the chamber three 13, there is a chamber four 14. There is a same partition two 19 between the two chambers one 11 and between the two chambers two 12. There are shunt mechanisms two 7 inside the two chambers two 12. The tops of the two shunt mechanisms two 7 are fixedly connected to the inner wall of the bottom of the chamber three 13. The chamber two 12 can be communicated with the chamber three 13 through the shunt mechanism two 7 in the open state. A negative pressure fan 8 is fixedly installed on the inner wall of the bottom of the chamber four 14. The air inlet of the negative pressure fan 8 is communicated with the chamber three 13. An air outlet 15 is provided on the inner wall of the top of the chamber four 14. There is a partition one 16 between the chamber two 12 and the chamber one 11 on the same side. Two filter cartridges 4 are fixedly installed at the bottom of the partition one 16. A backwashing mechanism 6 for dredging the two filter cartridges 4 is installed on the top of the partition one 16. There are two shunt mechanisms one 3 outside the dust removal box 1. A same three-way pipe 2 is provided on the two shunt mechanisms one 3. The three-way pipe 2 can be communicated with the corresponding chamber one 11 through the shunt mechanism one 3 in the open state.

[0026] The bottoms of both of the first chambers 11 are open, and ash hoppers 9 are detachably installed at the bottoms of the two first chambers 11. A first chamber door 17 is provided on one side of the first chamber 11, and a second chamber door 18 is provided on the same side of the two second chambers 12.

[0027] The first flow splitting mechanism 3 includes a rectangular box 31 fixedly connected to the outside of the dust removal box 1. An air inlet 32 and an air outlet 33 are provided on the rectangular box 31. The air outlet 33 is communicated with the first chamber 11. A first valve plate 36 is rotatably installed in the rectangular box 31. A first pneumatic actuator 35 is fixedly installed on the outside of the rectangular box 31. A first transmission shaft 351 is provided on the first pneumatic actuator 35. The first transmission shaft 351 penetrates through the rectangular box 31 and is rotatably connected to the rectangular box 31, and the first transmission shaft 351 penetrates through the first valve plate 36 and is fixedly connected to the first valve plate 36. A baffle 34 is provided on one side inside the rectangular box 31. An inlet 21 and two outlets 22 are provided on the tee pipe 2. The two outlets 22 are respectively communicated with the air inlets 32 on the corresponding first flow splitting mechanisms 3.

[0028] The second flow splitting mechanism 7 includes a rectangular air duct 71. A second valve plate 73 is rotatably installed in the rectangular air duct 71. A second pneumatic actuator 72 is fixedly installed on the outside of the rectangular air duct 71. A second transmission shaft 721 is provided on the second pneumatic actuator 72. The second transmission shaft 721 penetrates through the rectangular air duct 71 and is rotatably connected to the rectangular air duct 71, and the second transmission shaft 721 penetrates through the second valve plate 73 and is fixedly connected to the second valve plate 73.

[0029] Further, when the first pneumatic actuator 35 is started, the first valve plate 36 is driven to rotate by the first transmission shaft 351. When the four sides of the first valve plate 36 are in contact with the inner walls of the four sides of the rectangular box 31, the first flow splitting mechanism 3 can be in a closed state. When two of the four sides of the first valve plate 36 are not in contact with the corresponding inner walls of the rectangular box 31, the first flow splitting mechanism 3 is in an open state.

[0030] By providing the baffle 34, when the dust follows the airflow through the rectangular box 31 and then enters the first chamber 11, the airflow can carry the dust to first impact on the baffle 34 and then enter the first chamber 11. The baffle 34 can prevent the dust from directly entering the first chamber 11 and impacting on the filter cartridge 4, playing a certain protective role for the filter cartridge 4.

[0031] When the second pneumatic actuator 72 is started, the second valve plate 73 is driven to rotate by the second transmission shaft 721. When the four sides of the second valve plate 73 are in contact with the inner walls of the four sides of the rectangular box 31, the second flow splitting mechanism 7 can be in a closed state. When two of the four sides of the second valve plate 73 are not in contact with the corresponding inner walls of the rectangular box 31, the second flow splitting mechanism 7 is in an open state.

[0032] Two circular openings 161 are formed in the first partition plate 16. The top of the filter cylinder 4 is open, and one side of the top opening of each of the two filter cylinders 4 is fixedly connected to the bottom of the first partition plate 16. The two filter cylinders 4 are coaxially arranged with the corresponding circular openings 161. The back-blowing mechanism 6 includes a compressed air tank 61 fixedly installed on the top of the first partition plate 16. Two connecting pipes 62 are provided on the compressed air tank 61. A pulse switch air valve 64 and a nozzle 63 are provided on the connecting pipe 62. The nozzle 63 is located above the circular opening 161 and is coaxially arranged with the circular opening 161.

[0033] A cleaning mechanism 5 is sleeved outside the filter cylinder 4. The cleaning mechanism 5 includes a plurality of annular brushes 51 slidably sleeved outside the filter cylinder 4. The plurality of annular brushes 51 are linearly distributed. A plurality of annular brushes 51 are fixedly installed on the outer side of the annular brush 51 in a circumferential array. A plurality of guide rods 53 are provided on the outer side of the plurality of annular brushes 51 in a circumferential array. The plurality of guide rods 53 respectively penetrate through the corresponding connecting ears 52 and are slidably connected to the corresponding connecting ears 52. The top ends of the plurality of guide rods 53 are fixedly connected to the bottom of the first partition plate 16. The bottom ends of the plurality of guide rods 53 are fixedly installed with the same annular plate 54.

[0034] A spring 55 is slidably sleeved on each of the plurality of guide rods 53. The bottom end of the spring 55 is fixedly connected to the top of the annular plate 54. The top end of the spring 55 is fixedly connected to the corresponding connecting ear 52.

[0035] A plurality of sleeves 56 are slidably sleeved on the guide rods 53. The two ends of the plurality of sleeves 56 are respectively fixedly connected to the corresponding connecting ears 52. A plurality of sector-shaped ring plates 57 are fixedly installed on the outer side of the annular brush 51 in a circumferential array. The plurality of sector-shaped ring plates 57 and the plurality of connecting ears 52 are staggered.

[0036] Furthermore, by providing a plurality of sector-shaped ring plates 57 on the outer side of the annular brush 51, the contact area with the compressed air flow ejected by the nozzle 63 can be increased.

[0037] In this embodiment: The inlet 21 is externally connected to a dust suction pipe for sucking the dust generated during the operation of the string welding machine. During operation, the negative pressure fan 8, the first flow splitting mechanism 3 and the second flow splitting mechanism 7 on the same side are started, and the first flow splitting mechanism 3 and the second flow splitting mechanism 7 on the other side are closed. The sucked dust flows from the dust suction pipe through the inlet 21, through the three-way pipe 2, and then enters the corresponding chamber 11 through the opened first flow splitting mechanism 3. After being filtered by the two filter cylinders 4 in the chamber 11, the clean air enters the chamber 12 and then flows through the opened second flow splitting mechanism 7 into the chamber 13. After that, the clean air flows through the negative pressure fan 8, enters the filter cylinder 4, and then is discharged through the air outlet 15.

[0038] When the two filter cartridges 4 in one of the chambers 11 need to be cleaned and dredged after a long period of filtration, the flow dividing mechanism 1 3 and the flow dividing mechanism 2 7 on this side need to be closed, and the flow dividing mechanism 1 3 and the flow dividing mechanism 2 7 on the other side need to be opened. After that, the dust sucked can be filtered by the two filter cartridges 4 on the other side;

[0039] When cleaning and dredging the two filter cartridges 4 on the same side, the two pulse switch air valves 64 above the two filter cartridges 4 can be opened. The compressed air in the compressed air tank 61 is intermittently ejected from two nozzles 63 via two connecting pipes 62 and acts inside the two filter cartridges 4. Moreover, the air curtain ejected intermittently from the nozzles 63 is conical. The conical air curtain ejected from inside the filter cartridge 4 to the outside can complete the dredging of the filter cartridge 4. And after the air curtain blows out of the filter cartridge 4, it acts on the multi-layer fan-shaped rings 57 on the cleaning mechanism 5, which will cause each annular brush 51 to compress each spring 55 and then move downward to clean the outside of the filter cartridge 4. When the air ejected from the nozzles 63 stops, each compressed spring 55 will reset and cause the multiple annular brushes 51 to move upward. Since the conical air curtain of the nozzles 63 is ejected intermittently, it will cause the multiple annular brushes 51 to move up and down reciprocally to complete the cleaning of the outside of the filter cartridge 4. Cooperating with the compressed air ejected from the nozzles 63, the filter cartridge 4 can be cleaned doubly. The dust cleaned from the filter cartridge 4 will fall into the ash hopper 9 under the action of gravity, and only the ash hopper 9 needs to be cleaned regularly later.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A dual-chamber industrial dust collector for photovoltaic module production, comprising a dust removal box (1), characterized in that: The dust removal box (1) is provided with two chambers 1 (11) inside, chambers 2 (12) are provided above the two chambers 1 (11), chambers 3 (13) are provided above the two chambers 2 (12), chambers 4 (14) are provided above the chambers 3 (13), a partition 2 (19) is provided between the two chambers 1 (11) and between the two chambers 2 (12), flow diversion mechanisms 2 (7) are provided in the two chambers 2 (12), the tops of the two flow diversion mechanisms 2 (7) are fixedly connected to the bottom inner wall of the chamber 3 (13), the chamber 2 (12) can be connected to the chamber 3 (13) through the flow diversion mechanism 2 (7) in the open state, and a negative pressure is fixedly installed on the bottom inner wall of the chamber 4 (14). A compressor (8), the air inlet of the negative pressure fan (8) is connected to chamber three (13), the top inner wall of chamber four (14) is provided with an exhaust port (15), a partition plate (16) is provided between chamber two (12) and chamber one (11) located on the same side, two filter cartridges (4) are fixedly installed at the bottom of the partition plate (16), and a back-blowing mechanism (6) for clearing the two filter cartridges (4) is installed at the top of the partition plate (16), and two diversion mechanisms (3) are provided on the outside of the dust removal box (1), and the same three-way pipe (2) is opened on the two diversion mechanisms (3), and the three-way pipe (2) can be connected to the corresponding chamber one (11) through the diversion mechanism (3) in the open state.

2. A dual-chamber industrial dust collector for photovoltaic module production according to claim 1, characterized in that: The bottoms of the two chambers (11) are both opened, and the bottoms of the two chambers (11) are detachably provided with an ash hopper (9). One side of the chamber (11) is provided with a bin door (17), and the same side of the two chambers (12) is provided with the same bin door (18).

3. A dual-chamber industrial dust collector for photovoltaic module production according to claim 1, characterized in that: The flow dividing mechanism (3) comprises a rectangular box (31) fixedly connected to the outside of the dust removal box (1), the rectangular box (31) is provided with an air inlet (32) and an air outlet (33), the air outlet (33) is connected to the chamber (11), a valve plate (36) is rotatably mounted in the rectangular box (31), a pneumatic actuator (35) is fixedly mounted on the outside of the rectangular box (31), and a transmission shaft (32) is provided on the pneumatic actuator (35). 51), the transmission shaft 1 (351) passes through the rectangular box (31) and is rotatably connected to the rectangular box (31), and the transmission shaft 1 (351) passes through the valve plate 1 (36) and is fixedly connected to the valve plate 1 (36), a baffle (34) is provided on one side of the interior of the rectangular box (31), and the three-way pipe (2) is provided with an inlet (21) and two outlets (22), and the two outlets (22) are respectively connected to the air inlet (32) on the corresponding diversion mechanism 1 (3).

4. A dual-chamber industrial dust collector for photovoltaic module production according to claim 1, characterized in that: The second flow dividing mechanism (7) comprises a rectangular air duct (71), a second valve plate (73) is rotatably mounted in the rectangular air duct (71), a second pneumatic actuator (72) is fixedly mounted on the outer side of the rectangular air duct (71), a second transmission shaft (721) is provided on the second pneumatic actuator (72), the second transmission shaft (721) passes through the rectangular air duct (71) and is rotatably connected to the rectangular air duct (71), and the second transmission shaft (721) passes through the second valve plate (73) and is fixedly connected to the second valve plate (73).

5. A dual-chamber industrial dust collector for photovoltaic module production according to claim 1, characterized in that: The partition plate (16) is provided with two circular openings (161); the top of the filter cartridge (4) is open, and one side of the top opening of the two filter cartridges (4) is fixedly connected to the bottom of the partition plate (16); the two filter cartridges (4) are coaxially arranged with the corresponding circular openings (161); the back-blowing mechanism (6) comprises a compressed gas tank (61) fixedly mounted on the top of the partition plate (16); the compressed gas tank (61) is provided with two connecting pipes (62); the connecting pipe (62) is provided with a pulse switch gas valve (64) and a nozzle (63); the nozzle (63) is located above the circular opening (161) and is coaxially arranged with the circular opening (161).

6. A dual-chamber industrial dust collector for photovoltaic module production according to claim 1, characterized in that: The outer side of the filter cylinder (4) is provided with a cleaning mechanism (5), the cleaning mechanism (5) comprising a plurality of annular brushes (51) slidably sleeved on the outer side of the filter cylinder (4), the plurality of annular brushes (51) being linearly distributed, a plurality of annular brushes (51) distributed in a circumferential array being fixedly mounted on the outer side of the annular brush (51), a plurality of guide rods (53) distributed in a circumferential array being arranged on the outer side of the plurality of annular brushes (51), the plurality of guide rods (53) respectively passing through corresponding connecting ears (52) and being slidably connected to the corresponding connecting ears (52), the top ends of the plurality of guide rods (53) being fixedly connected to the bottom of a partition plate (16), and the bottom ends of the plurality of guide rods (53) being fixedly mounted with the same annular plate (54).

7. A dual-chamber industrial dust collector for photovoltaic module production according to claim 6, characterized in that: A spring (55) is slidably sleeved on each of the plurality of guide rods (53), the bottom end of the spring (55) is fixedly connected to the top of the annular plate (54), and the top end of the spring (55) is fixedly connected to the corresponding connecting ear (52).

8. A dual-chamber industrial dust collector for photovoltaic module production according to claim 6, characterized in that: A plurality of sleeves (56) are slidably sleeved on the guide rod (53), and the two ends of the plurality of sleeves (56) are respectively fixedly connected to the corresponding connecting ears (52). A plurality of fan-shaped ring plates (57) distributed in a circumferential array are fixedly installed on the outer side of the annular brush (51), and the plurality of fan-shaped ring plates (57) and the plurality of connecting ears (52) are staggeredly distributed.

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