Equipment capable of collecting waste gas and having cleaning function

Abstract

The invention discloses equipment capable of collecting waste gas and having a cleaning function, and relates to the technical field of waste gas purification equipment.The equipment comprises a shell, an air inlet is formed in the bottom of the shell, an exhaust port is further formed in the shell, and the equipment further comprises a fixing ring fixedly installed at the end, close to the air inlet, in the shell; an outer filter cartridge is fixedly mounted on the fixing ring through a diffusion ring, an inner filter cartridge is slidably mounted on the outer filter cartridge, and the inner filter cartridge can slide up and down relative to the outer filter cartridge to adjust the size of a filter space in the shell; and the screw rod is rotationally mounted on the inner filter cartridge. The equipment has the advantages that the size of the filtering area is regulated and controlled according to the air inflow change of the equipment, the filtering effect under different air inflow is ensured, air inflow backflow is avoided, meanwhile, when blockage occurs, attached dust can be automatically and effectively scraped away, and the scraped dust is collected in a unified mode; and dust is prevented from being blown and diffused by waste gas while the cleaning effect is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas purification equipment, and in particular to a device capable of collecting waste gas and having a cleaning function. Background Art

[0002] Exhaust gas is a harmful gas produced by industrial production, chemical processes or other emission sources. In order to reduce the direct emission of pollutants into the atmosphere and protect the environment and human health, the exhaust gas is usually purified. The current purification equipment generally performs preliminary filtration on the exhaust gas to remove large particles of dust. The existing preliminary filtration equipment has a constant filtration area for large particles of dust during use. When the intake volume changes greatly, the constant filtration area is difficult to ensure an effective filtration effect. Moreover, as time goes by, the large particles of dust filtered out will also cause blockage inside the preliminary filtration equipment, resulting in poor subsequent filtration effect. Therefore, it is necessary to design a device that can collect exhaust gas and has a cleaning function. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention provides a device that can collect waste gas and has a cleaning function, which solves the problems raised in the above background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A device capable of collecting waste gas and having a cleaning function, comprising a housing, an air inlet being provided at the bottom of the housing, an exhaust port being installed on the housing, and further comprising: A fixing ring, which is fixedly mounted on one end of the housing near the air inlet. An outer filter cartridge is fixedly mounted on the fixing ring via a diffusion ring, and an inner filter cartridge is slidably mounted on the outer filter cartridge. The inner filter cartridge can slide up and down relative to the outer filter cartridge to adjust the size of the filter space in the housing; A screw rod, which is rotatably mounted on the inner filter cartridge, and a mounting bracket is threadedly mounted on the screw rod, a rotating ring is fixedly mounted on the lower end of the mounting bracket, and a plurality of scraping strips are mounted on the side wall of the rotating ring, and the scraping strips are used to scrape dust off the outer filter cartridge and the inner wall of the inner filter cartridge, a mounting ring is rotatably mounted on the bottom of the rotating ring, and a plurality of soft bristles are fixedly mounted on the side wall of the mounting ring, a protrusion is fixedly mounted on the inner wall of the rotating ring, and a driving assembly that cooperates with the mounting ring is mounted on the protrusion, and the driving assembly is used to provide drive for the rotation of the mounting ring when the rotating ring moves up and down; The inner ring is fixedly mounted on the fixed ring, and a collection groove is formed between the inner ring and the diffusion ring, and the collection groove is used to collect the scraped dust. A dust removal groove communicating with the collection groove is provided on the side wall of the fixed ring, and a sealing plate matching the dust removal groove is sealed and clamped on the side wall of the shell. A connecting frame is rotatably mounted on the inner ring, and a scraper matching the collection groove is fixedly mounted on the bottom of the connecting frame.

[0005] Furthermore, the bottom opening of the fixed ring is trumpet-shaped, the diffusion ring is funnel-shaped, a plurality of sliders are fixedly installed on the side wall of the inner filter cartridge, and a plurality of sliding grooves that slide with the corresponding sliders are opened on the inner wall of the outer filter cartridge, and the depth of the sliding grooves is less than the height of the outer filter cartridge.

[0006] Furthermore, a plurality of connecting grooves are provided on the side wall of the rotating ring, and a connecting rod fixedly connected to the corresponding scraper strip is slidably installed in each connecting groove, and a spring is installed between each connecting rod and the corresponding connecting groove.

[0007] Furthermore, a connecting ring is fixedly installed on the top of the mounting ring, and an annular groove is provided on the bottom wall of the rotating ring, which is sealed and rotated with the connecting ring. The driving assembly consists of an inner gear ring, a driving gear ring, a spiral rod and a guide block. The inner gear ring is fixedly installed on the connecting ring, the driving gear ring is rotatably installed in the protrusion, and the driving gear ring is meshed with the inner gear ring. The spiral rod is fixedly installed in the shell, and the spiral rod is sealed and slidably engaged with the inner filter cartridge. The guide block is fixedly installed on the inner wall of the driving gear ring, and the guide block is engaged with the spiral groove on the spiral rod.

[0008] Furthermore, a docking disc 1 is fixedly mounted on the bottom of the screw rod, and a docking ring matching the docking disc 1 is fixedly mounted on the top of the connecting frame. When the screw rod moves upward in the shell, the docking disc 1 and the docking ring can be engaged with each other.

[0009] Furthermore, an electric telescopic rod and a servo motor are fixedly installed on the top of the shell, the output end of the electric telescopic rod is fixedly connected to the top of the inner filter cartridge, the output end of the servo motor is fixedly installed with a docking plate, and the top of the screw rod is fixedly installed with a docking plate 2 that matches the docking plate. When the screw rod moves upward in the shell, the docking plate 2 and the docking plate can be clamped with each other.

[0010] Furthermore, flow meters are installed in the air inlet and the exhaust port, a controller is fixedly installed on the shell, and the input end of the controller is electrically connected to the flow meter, and the output end of the controller is electrically connected to the electric telescopic rod and the servo motor.

[0011] Furthermore, a bellows 1 for sealing the screw rod is installed between the docking plate 1 and the mounting frame, a positioning plate is fixedly installed at the bottom of the screw rod, and a bellows 2 for sealing the screw rod is installed between the positioning plate and the inner filter cartridge and between the inner filter cartridge and the shell.

[0012] Compared with the existing technology, the advantages of the present invention are: 1. Through the cooperation of the inner filter cartridge and the outer filter cartridge, the size of the filtration area can be adjusted according to the changes in the air intake of the equipment, thereby effectively ensuring the filtration effect of the equipment under different air intake volumes, and the adjustable filtration area can also maintain the overall filtration effect when blockage occurs, avoiding air backflow.

[0013] 2. Through the cooperation of the mounting ring, soft bristles and scraping strips, the dust can be swept in a spiral manner first and then scraped in a spiral manner during the clearing process, thereby effectively removing the clogged dust and ensuring the cleaning effect.

[0014] 3. The cooperation between the diffusion ring and the inner ring can be used to collect the scraped dust to prevent it from being blown away by the exhaust gas again, resulting in ineffective cleaning. In addition, with the cooperation of the connecting frame and the scraper, the scraped dust can be gathered and collected in a unified manner during the dust cleaning process, which also facilitates the subsequent unified discharge of the dust.

[0015] To sum up, the present invention regulates the size of the filtering area according to the changes in the air intake volume of the equipment, ensuring the filtering effect under different air intake volumes and avoiding air backflow. At the same time, when blockage occurs, the attached dust can be automatically scraped off and the scraped dust can be collected in a unified manner, ensuring the cleaning effect while preventing the dust from being blown and spread by the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a device that can collect waste gas and has a cleaning function proposed by the present invention; Figure 2 for Figure 1 Structural diagram from another perspective; Figure 3 for Figure 1 A top view of Figure 4 for Figure 3 Schematic diagram of the structure of the AA surface; Figure 5 for Figure 1 Schematic diagram of the structure after removing the shell; Figure 6 for Figure 5 Structural diagram from another perspective; Figure 7 for Figure 6 Schematic diagram of the structural decomposition of the inner filter cartridge and the outer filter cartridge; Figure 8 for Figure 7 Structural diagram from another perspective; Figure 9 for Figure 6 Schematic diagram of the internal structure of the middle and inner filter cartridges; Figure 10 for Figure 9Structural diagram from another perspective; Figure 11 for Figure 10 An exploded and enlarged schematic diagram of the structure at the middle rotating ring; Figure 12 for Figure 4 A schematic diagram of the structure of part a is enlarged; Figure 13 for Figure 4 Schematic diagram of the enlarged structure of part b.

[0017] In the figure: 1. Shell; 2. Fixed ring; 3. Diffuser ring; 4. Outer filter cartridge; 5. Inner filter cartridge; 6. Electric telescopic rod; 7. Slider; 8. Screw; 9. Mounting frame; 10. Rotating ring; 11. Bump; 12. Mounting ring; 13. Soft bristles; 14. Scraper; 15. Connecting ring; 16. Inner gear ring; 17. Drive gear ring; 18. Screw rod; 19. Connecting groove; 20. Connecting rod; 21. Spring; 22. Inner ring; 23. Connecting frame; 24. Scraper; 25. Dust removal groove; 26. Docking ring; 27. Docking plate 1; 28. Docking plate 2; 29. ​​Servo motor; 30. Bellows 1; 31. Positioning plate; 32. Bellows 2. DETAILED DESCRIPTION

[0018] Reference Figure 1-Figure 3 , a device that can collect exhaust gas and has a cleaning function, including a shell 1, an air inlet is opened at the bottom of the shell 1, and an exhaust port is also installed on the shell 1, and flow meters are installed in the air inlet and the exhaust port. The flow meter is used to monitor the gas flow in real time. Specifically, the flow meter in the air inlet is used to monitor the intake volume of the exhaust gas in real time, and the flow meter in the exhaust port is used to monitor the emission volume of the gas after the primary filtration in real time. By comparing the flow rates of the two flow meters, the filtering effect and the degree of blockage of the device can be known. If the intake volume and the emission volume are always within a certain range, it means that the primary filtration effect is normal and the device is not blocked. When the intake volume is When the difference between the intake volume and the emission volume is small, it is considered that the initial filtration effect of the equipment is poor or the content of large particles of dust in the exhaust gas is small. When the difference between the intake volume and the emission volume is large, it is considered that the content of large particles of dust in the exhaust gas is large or the equipment is blocked. Different treatments can be performed according to different data differences to maintain the normal operation of the equipment. When the data difference is within a certain range or the data difference is small, the normal operation of the equipment is maintained. When the data difference is large, the filtration area of ​​the equipment is increased. If the subsequent data difference is still large, the dust inside the equipment is cleaned. The flow meter is an existing product, and its working principle and specific structure are not explained here.

[0019] Reference Figures 1-13, a device that can collect exhaust gas and has a cleaning function, also includes a fixed ring 2, the fixed ring 2 is fixedly installed at one end of the shell 1 near the air inlet, the outer filter cartridge 4 is fixedly installed on the fixed ring 2 through the diffusion ring 3, and the inner filter cartridge 5 is slidably installed on the outer filter cartridge 4, the bottom opening of the fixed ring 2 is trumpet-shaped, and the diffusion ring 3 is funnel-shaped. The trumpet-shaped opening at the bottom of the fixed ring 2 allows the exhaust gas to smoothly enter the diffusion ring 3 from the middle of the fixed ring 2, and the funnel-shaped setting of the diffusion ring 3 allows the exhaust gas to diffuse from the middle to the outside, so that it can move up along the inner wall of the outer filter cartridge 4 , so that the exhaust gas can be effectively filtered by the outer filter cartridge 4. The outer filter cartridge 4 and the inner filter cartridge 5 are both provided with a corresponding number of filter holes, and the filter holes on the two are relative to each other. The inner filter cartridge 5 can slide up and down relative to the outer filter cartridge 4 to adjust the size of the filter space in the shell 1. When the inner filter cartridge 5 overlaps with the outer filter cartridge 4, the filter area is the smallest, and it is suitable for the initial filtration treatment of normal intake flow. When the inner filter cartridge 5 is stretched upward on the outer filter cartridge 4, the filter area is the largest, and it is suitable for the initial filtration treatment when the exhaust gas intake volume is large and the difference between the intake volume and the exhaust volume is large; A plurality of sliders 7 are fixedly mounted on the side wall of the inner filter cartridge 5, and a plurality of slide grooves are provided on the inner wall of the outer filter cartridge 4 for sliding cooperation with the corresponding sliders 7, and the depth of the slide groove is less than the height of the outer filter cartridge 4. The cooperation between the slider 7 and the slide groove is used to limit the moving direction of the inner filter cartridge 5 on the outer filter cartridge 4. At the same time, the depth setting of the slide groove can avoid the problem of separation between the inner filter cartridge 5 and the outer filter cartridge 4, thereby ensuring the filtering effect of large particles of dust. An electric telescopic rod 6 is fixedly mounted on the top of the shell 1, and the output end of the electric telescopic rod 6 is fixedly connected to the top of the inner filter cartridge 5. The electric telescopic rod 6 is designed to adjust the installation height of the inner filter cartridge 5 in the shell 1, thereby realizing control of the filtration area. The electric telescopic rod 6 is an existing product, and its working principle and specific structure are not elaborated here.

[0020] The screw rod 8 is rotatably mounted on the inner filter cartridge 5, and a mounting bracket 9 is threadedly mounted on the screw rod 8. A rotating ring 10 is fixedly mounted on the lower end of the mounting bracket 9. When the screw rod 8 rotates, the rotating ring 10 can be driven by the mounting bracket 9 to move up and down along the inner filter cartridge 5. The length of the screw rod 8 is greater than or equal to the sum of the heights of the inner filter cartridge 5 and the outer filter cartridge 4. By designing the length of the screw rod 8, the rotating ring 10 can be moved from top to bottom within the filtering range after increasing the filtration area, and a plurality of scraping strips 14 are installed on the side wall of the rotating ring 10. When the rotating ring 10 moves up and down, the rotating ring 10 moves downward. When the filter element 10 is in motion, the scraper 14 can be driven to move up and down at the same time to scrape the dust on the inner wall of the outer filter cartridge 4 and the inner filter cartridge 5. A plurality of connecting grooves 19 are provided on the side wall of the rotating ring 10, and a connecting rod 20 fixedly connected to the corresponding scraper 14 is slidably installed in each connecting groove 19. A spring 21 is installed between each connecting rod 20 and the corresponding connecting groove 19. Through the cooperation of the spring 21, the connecting groove 19 and the connecting rod 20, the scraper 14 can extend outward relative to the rotating ring 10, thereby ensuring the scraping effect of the scraper 14 on the inner wall of the outer filter cartridge 4.

[0021] A servo motor 29 is also fixedly installed on the top of the shell 1, and a docking plate is fixedly installed on the output end of the servo motor 29. A docking disc 28 that cooperates with the docking plate is fixedly installed on the top of the screw rod 8. When the electric telescopic rod 6 moves the inner filter cartridge 5 to the maximum position in the shell 1, the docking disc 28 is engaged with the docking plate. At this time, the operation of the servo motor 29 can drive the screw rod 8 to rotate, thereby driving the up and down movement of the rotating ring 10. The servo motor 29 is an existing product, and its working principle and specific structure are not elaborated here.

[0022] A controller is fixedly mounted on the housing 1, and the input end of the controller is electrically connected to the flow meter, and the output end of the controller is electrically connected to the electric telescopic rod 6 and the servo motor 29. The controller can adopt an existing PLC controller, and its working principle and specific structure are not elaborated here. Through the design of the controller, the working conditions of the electric telescopic rod 6 and the servo motor 29 can be automatically controlled by comparing the data difference between the two flow meters, so that the device automatically completes the adjustment of the filter area and the cleaning of dust. Specifically, when the intake flow rate is large or the difference between the intake and exhaust volumes is large, the controller first operates the electric telescopic rod 6 to move the inner filter cartridge 5 upward to increase the filter area. After working for a period of time, if the difference between the intake and exhaust volumes is still large, the servo motor 29 is operated again. The motor 29 works to clean the large particles of dust accumulated in the outer filter cartridge 4 and the inner filter cartridge 5. Then, when the air intake flow rate decreases and the difference between the air intake and exhaust volume is within the specified range, the controller first reverses the servo motor 29 to reset the rotating ring 10, and then controls the electric telescopic rod 6 to move the inner filter cartridge 5 downward and reset. By designing a step to increase the filtering area, the problem of poor initial filtration effect when the air intake flow rate increases can be effectively solved. At the same time, when the filtering area is minimum, it is the inner filter cartridge 5 that is used to filter the dust, and the outer filter cartridge 4 can basically be kept clean. Therefore, when the inner filter cartridge 5 is blocked, the filtering area can be increased to ensure that the outer filter cartridge 4 can filter the dust, thereby avoiding the problem of air intake backflow caused by the blockage of both the inner filter cartridge 5 and the outer filter cartridge 4.

[0023] A mounting ring 12 is rotatably mounted on the bottom of the rotating ring 10, and a plurality of soft bristles 13 are fixedly mounted on the side wall of the mounting ring 12. A connecting ring 15 is fixedly mounted on the top of the mounting ring 12. An annular groove is provided on the bottom wall of the rotating ring 10 for sealing and rotating with the connecting ring 15. During the up and down movement of the rotating ring 10, the mounting ring 12 can be driven to move at the same time. At this time, the movement of the soft bristles 13 can be used to dredge the filter holes. When the soft bristles 13 move, some dust may be pushed out of the filter holes to the outside of the outer filter cartridge 4 and fall between the shell 1 and the diffusion ring 3. Due to the shape settings of the outer filter cartridge 4 and the inner filter cartridge 5, the gas filtered therefrom is difficult to blow away the dust falling between the shell 1 and the diffusion ring 3. Therefore, a sealable cleaning port is provided on the side wall of the shell 1, so that the dust falling between the shell 1 and the diffusion ring 3 can be cleaned regularly. A protrusion 11 is fixedly mounted on the inner wall of the rotating ring 10, and a driving assembly that cooperates with the mounting ring 12 is mounted on the protrusion 11. The driving assembly consists of an inner gear ring 16, a driving gear ring 17, a spiral rod 18 and a guide block. The inner gear ring 16 is fixedly mounted on the connecting ring 15, and the driving gear ring 17 is rotatably mounted in the protrusion 11, and the driving gear ring 17 is engaged with the inner gear ring 16. The spiral rod 18 is fixedly mounted in the housing 1, and the spiral rod 18 is sealed and slidably matched with the inner filter cartridge 5. The guide block is fixedly mounted on the inner wall of the driving gear ring 17, and the guide block cooperates with the spiral groove on the spiral rod 18. When the rotating ring 10 drives the mounting ring 12 to move up and down, the screw rod 18 is rotated and meshed with the inner gear ring 16. The cooperation between the spiral groove and the guide block can make the driving ring gear 17 rotate in the protrusion 11. At this time, the meshing effect of the driving ring gear 17 and the inner ring gear 16 can be used to make the mounting ring 12 rotate simultaneously during the up and down movement, so that the soft bristles 13 can effectively clean the inner walls of the outer filter cartridge 4 and the inner filter cartridge 5. In addition, the scraper bar 14 can also be installed on the side wall of the mounting ring 12, and the scraper bar 14 is located above the soft bristles 13. At this time, during the movement of the rotating ring 10, the scraper bar 14 will also move up and down in a spiral manner along the inner walls of the inner filter cartridge 5 and the outer filter cartridge 4, further improving the cleaning effect of the dust, and also facilitating the cleaning of firmly attached dust.

[0024] The inner ring 22 is fixedly mounted on the fixed ring 2, and a collecting groove is formed between the inner ring 22 and the diffusion ring 3. The collecting groove is used to collect the scraped dust. Due to the shape of the diffusion ring 3, the scraped dust can be guided to fall into the collecting groove as much as possible, avoiding it from being blown by the exhaust gas again and causing ineffective cleaning. At the same time, it is also convenient for unified treatment of the scraped dust. A dust removal groove 25 communicating with the collection groove is provided on the side wall of the fixed ring 2, and a sealing plate that cooperates with the dust removal groove 25 is sealed and clamped on the side wall of the shell 1. A connecting frame 23 is rotatably mounted on the inner ring 22, and a scraper 24 that cooperates with the collection groove is fixedly mounted on the bottom of the connecting frame 23. When the connecting frame 23 rotates, the dust falling into the collection groove can be gathered by the scraper 24 and pushed into the dust removal groove 25. After that, the staff can regularly open the sealing plate to discharge the dust in the dust removal groove 25. The operation is simple.

[0025] A docking plate 27 is fixedly installed at the bottom of the screw rod 8, and a docking ring 26 that cooperates with the docking plate 27 is fixedly installed on the top of the connecting frame 23. When the inner filter cartridge 5 moves up, it will drive the screw rod 8 to move up at the same time. When the inner filter cartridge 5 moves up and the docking plate 28 is engaged with the docking plate, the docking plate 27 and the docking ring 26 are also engaged. Therefore, when the servo motor 29 is working, it can not only provide drive for the up and down movement of the rotating ring 10, but also provide drive for the rotation of the connecting frame 23.

[0026] A bellows 1 30 for sealing the screw rod 8 is installed between the docking plate 1 27 and the mounting frame 9, a positioning plate 31 is fixedly installed at the bottom of the screw rod 18, and a bellows 2 32 for sealing the screw rod 18 is installed between the positioning plate 31 and the inner filter cartridge 5 and between the inner filter cartridge 5 and the housing 1. The design of the bellows 1 30 and the bellows 2 32 is used to provide dust-proof design for the screw rod 8 and the screw rod 18, which can ensure the transmission and guiding effects of the two.

[0027] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A device capable of collecting waste gas and having a cleaning function, comprising a housing (1), an air inlet being provided at the bottom of the housing (1), and an exhaust port being installed on the housing (1), characterized in that: Also includes: A fixing ring (2), the fixing ring (2) being fixedly mounted on one end of the housing (1) near the air inlet, an outer filter cartridge (4) being fixedly mounted on the fixing ring (2) via a diffusion ring (3), and an inner filter cartridge (5) being slidably mounted on the outer filter cartridge (4), the inner filter cartridge (5) being able to slide up and down relative to the outer filter cartridge (4) to adjust the size of the filter space in the housing (1); A screw rod (8), the screw rod (8) is rotatably mounted on the inner filter cartridge (5), and a mounting bracket (9) is threadedly mounted on the screw rod (8), a rotating ring (10) is fixedly mounted on the lower end of the mounting bracket (9), and a plurality of scraping strips (14) are mounted on the side wall of the rotating ring (10), and the scraping strips (14) are used to scrape dust from the inner wall of the outer filter cartridge (4) and the inner filter cartridge (5), a mounting ring (12) is rotatably mounted on the bottom of the rotating ring (10), and a plurality of soft bristles (13) are fixedly mounted on the side wall of the mounting ring (12), a convex block (11) is fixedly mounted on the inner wall of the rotating ring (10), and a driving assembly that cooperates with the mounting ring (12) is mounted on the convex block (11), and the driving assembly is used to provide drive for the rotation of the mounting ring (12) when the rotating ring (10) moves up and down; An inner ring (22) is fixedly mounted on the fixed ring (2), and a collecting groove is formed between the inner ring (22) and the diffusion ring (3), and the collecting groove is used to collect scraped dust. A dust removal groove (25) communicating with the collecting groove is provided on the side wall of the fixed ring (2), and a sealing plate matching the dust removal groove (25) is sealed and clamped on the side wall of the shell (1). A connecting frame (23) is rotatably mounted on the inner ring (22), and a scraper (24) matching the collecting groove is fixedly mounted on the bottom of the connecting frame (23).

2. The device for collecting waste gas and having a cleaning function according to claim 1, characterized in that: The bottom opening of the fixed ring (2) is trumpet-shaped, the diffusion ring (3) is funnel-shaped, a plurality of sliders (7) are fixedly mounted on the side wall of the inner filter cartridge (5), and a plurality of slide grooves for slidingly engaging with corresponding sliders (7) are provided on the inner wall of the outer filter cartridge (4), and the depth of the slide grooves is less than the height of the outer filter cartridge (4).

3. The device for collecting waste gas and having a cleaning function according to claim 1, characterized in that: A plurality of connecting grooves (19) are provided on the side wall of the rotating ring (10), and a connecting rod (20) fixedly connected to the corresponding scraper strip (14) is slidably installed in each connecting groove (19), and a spring (21) is installed between each connecting rod (20) and the corresponding connecting groove (19).

4. The device for collecting waste gas and having a cleaning function according to claim 1, characterized in that: A connecting ring (15) is fixedly mounted on the top of the mounting ring (12), and an annular groove is provided on the bottom wall of the rotating ring (10) for sealing and rotating with the connecting ring (15). The driving assembly consists of an inner gear ring (16), a driving gear ring (17), a spiral rod (18) and a guide block. The inner gear ring (16) is fixedly mounted on the connecting ring (15), the driving gear ring (17) is rotatably mounted in the protrusion (11), and the driving gear ring (17) is meshed with the inner gear ring (16). The spiral rod (18) is fixedly mounted in the housing (1), and the spiral rod (18) is sealingly and slidingly matched with the inner filter cartridge (5). The guide block is fixedly mounted on the inner wall of the driving gear ring (17), and the guide block is matched with the spiral groove on the spiral rod (18).

5. The device for collecting waste gas and having a cleaning function according to claim 4, characterized in that: A docking plate (27) is fixedly mounted on the bottom of the screw rod (8), and a docking ring (26) that matches the docking plate (27) is fixedly mounted on the top of the connecting frame (23). When the screw rod (8) moves upward in the housing (1), the docking plate (27) and the docking ring (26) can be engaged with each other.

6. The device for collecting waste gas and having a cleaning function according to claim 1, characterized in that: An electric telescopic rod (6) and a servo motor (29) are fixedly mounted on the top of the housing (1); the output end of the electric telescopic rod (6) is fixedly connected to the top of the inner filter cartridge (5); a docking plate is fixedly mounted on the output end of the servo motor (29); a docking plate 2 (28) that matches the docking plate is fixedly mounted on the top of the screw rod (8); the screw rod (8) moves upward in the housing (1) to enable the docking plate 2 (28) to engage with the docking plate.

7. The device for collecting waste gas and having a cleaning function according to claim 6, characterized in that: Flow meters are installed in the air inlet and the exhaust port, a controller is fixedly installed on the housing (1), and the input end of the controller is electrically connected to the flow meter, and the output end of the controller is electrically connected to the electric telescopic rod (6) and the servo motor (29).

8. The device for collecting waste gas and having a cleaning function according to claim 5, characterized in that: A bellows 1 (30) for sealing the screw rod (8) is installed between the docking plate 1 (27) and the mounting frame (9), a positioning plate (31) is fixedly installed at the bottom of the screw rod (18), and a bellows 2 (32) for sealing the screw rod (18) is installed between the positioning plate (31) and the inner filter cartridge (5) and between the inner filter cartridge (5) and the housing (1).

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