An apparatus for collecting exhaust gas and having a cleaning function

Abstract

The application discloses a kind of equipment of collecting exhaust gas and having cleaning function, it is related to exhaust gas purification equipment technical field, the application includes shell, the shell bottom is equipped with air inlet, the shell is also installed with exhaust port, further include: fixed ring, the fixed ring is fixedly installed in shell inside one end close to air inlet, the fixed ring is fixedly installed with outer filter cartridge by diffusion ring on, and outer filter cartridge is slidably installed with inner filter cartridge, the inner filter cartridge can be slid up and down relative to outer filter cartridge, the size of filter space in shell is adjusted;Lead screw, the lead screw is rotatably installed on inner filter cartridge.The advantages are that: the filter area size is regulated according to the air intake variation of the equipment, ensure the filtering effect under different air intake and avoid air intake backflow, while when blockage occurs, can automatically effectively scrape attached dust and collect scraped dust uniformly, while ensuring cleaning effect, avoid dust being blown and spread by exhaust gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas purification equipment, and particularly relates to a waste gas collecting and cleaning equipment. BACKGROUND

[0002] Waste gas is harmful gas generated by industrial production, chemical processes or other emission sources. In order to reduce the direct emission of pollutants into the atmosphere, protect the environment and human health, waste gas is usually purified. The current purification equipment generally performs primary filtration on waste gas to remove large particles of dust. However, the filtering area of the existing primary filtration equipment is constant when in use. When the air intake changes greatly, the constant filtering area cannot guarantee effective filtering effect. In addition, as time goes by, the large particles of dust filtered will also cause internal blockage of the primary filtration equipment, resulting in poor subsequent filtering effect. Therefore, it is necessary to design a waste gas collecting and cleaning equipment. SUMMARY

[0003] In view of the defects of the prior art, the present application provides a waste gas collecting and cleaning equipment, which solves the problems in the background art.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] The waste gas collecting and cleaning equipment comprises a shell, an air inlet is formed in the bottom of the shell, an air outlet is further installed on the shell, and the equipment further comprises:

[0006] A fixed ring is fixedly installed on one end of the shell close to the air inlet, an outer filter cylinder is fixedly installed on the fixed ring through a diffusion ring, and an inner filter cylinder is slidably installed on the outer filter cylinder, and the inner filter cylinder can slide up and down relative to the outer filter cylinder to adjust the size of the filtering space in the shell;

[0007] A lead screw is rotatably installed on the inner filter cylinder, and a mounting bracket is threadedly installed on the lead screw, a rotating ring is fixedly installed at the lower end of the mounting bracket, a plurality of scraping strips are installed on the side wall of the rotating ring, the scraping strips are used for scraping dust on the inner wall of the outer filter cylinder and the inner filter cylinder, a mounting ring is rotatably installed at the bottom of the rotating ring, a plurality of soft bristles are fixedly installed on the side wall of the mounting ring, a protrusion is fixedly installed on the inner wall of the rotating ring, a driving assembly matched with the mounting ring is installed on the protrusion, and the driving assembly is used for providing driving for rotation of the mounting ring when the rotating ring moves up and down;

[0008] The inner ring is fixedly installed on the fixed ring, and a collecting groove is formed between the inner ring and the diffusion ring, which is used for collecting the scraped dust, a dust removal groove is formed in the sidewall of the fixed ring and communicates with the collecting groove, and a sealing plate matched with the dust removal groove is sealingly connected to the sidewall of the shell, a connecting frame is rotatably installed on the inner ring, and a scraper matched with the collecting groove is fixedly installed at the bottom of the connecting frame.

[0009] Further, the bottom opening of the fixed ring is trumpet-shaped, the diffusion ring is funnel-shaped, a plurality of sliding blocks are fixedly installed on the sidewall of the inner filter cylinder, a plurality of sliding grooves matched with the corresponding sliding blocks are formed in the inner wall of the outer filter cylinder, and the depth of the sliding grooves is less than the height of the outer filter cylinder.

[0010] Further, a plurality of connecting grooves are formed in the sidewall of the rotating ring, and a connecting rod fixedly connected with a corresponding scraper is slidingly installed in each connecting groove.

[0011] Further, a connecting ring is fixedly installed at the top of the mounting ring, an annular groove matched with the connecting ring is formed in the bottom wall of the rotating ring, the driving assembly is composed of an inner gear ring, a driving gear ring, a screw 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 engaged with the inner gear ring, the screw rod is fixedly installed in the shell, and the screw rod is sealingly and slidingly matched with the inner filter cylinder, the guide block is fixedly installed on the inner wall of the driving gear ring, and the guide block is matched with the spiral groove on the screw rod.

[0012] Further, a butt joint disc one is fixedly installed at the bottom of the screw rod, a butt joint ring matched with the butt joint disc one is fixedly installed at the top of the connecting frame, and the butt joint disc one and the butt joint ring are mutually clamped when the screw rod moves upward in the shell.

[0013] Further, an electric telescopic rod and a servo motor are fixedly installed at the top of the shell, the output end of the electric telescopic rod is fixedly connected with the top of the inner filter cylinder, a butt joint plate is fixedly installed at the output end of the servo motor, a butt joint disc two matched with the butt joint plate is fixedly installed at the top of the screw rod, and the butt joint disc two and the butt joint plate are mutually clamped when the screw rod moves upward in the shell.

[0014] Further, flow meters are installed in the air inlet and the air outlet, a controller is fixedly installed on the shell, the input end of the controller is electrically connected with the flow meters, and the output end of the controller is electrically connected with the electric telescopic rod and the servo motor.

[0015] Further, the mounting frame is provided with a bellows I for sealing the screw rod, the bottom of the screw rod is fixedly provided with a positioning disc, and the positioning disc, the inner filter cartridge and the housing are all provided with bellows II for sealing the screw rod.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. The filter area can be adjusted according to the air intake of the equipment, so that the filtering effect under different air intakes can be ensured, and the adjustable filter area can maintain the overall filtering effect when clogging occurs, avoiding air backflow.

[0018] 2. The dust can be effectively removed by the cooperation of the mounting ring, soft bristles and scraping strips, ensuring the cleaning effect.

[0019] 3. The dust scraped off can be collected by the cooperation of the diffusion ring and the inner ring, avoiding ineffective cleaning caused by the blowing of exhaust gas. In addition, the dust scraped off can be gathered and uniformly collected during the cleaning process by the cooperation of the connecting frame and the scraping plate, which is convenient for subsequent unified discharge of the dust.

[0020] In summary, the filter area is adjusted according to the air intake of the equipment, ensuring the filtering effect under different air intakes and avoiding air backflow. When clogging occurs, the attached dust can be effectively scraped off and collected, ensuring the cleaning effect and avoiding the blowing and diffusion of dust by exhaust gas. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structure diagram of a device for collecting exhaust gas and having cleaning function is provided.

[0022] Figure 2 A structure diagram of a device for collecting exhaust gas and having cleaning function is provided. Figure 1 A structure diagram of a device for collecting exhaust gas and having cleaning function is provided.

[0023] Figure 3 A structure diagram of a device for collecting exhaust gas and having cleaning function is provided. Figure 1 A structure diagram of a device for collecting exhaust gas and having cleaning function is provided.

[0024] Figure 4 A structure diagram of a device for collecting exhaust gas and having cleaning function is provided. Figure 3 A structure diagram of a device for collecting exhaust gas and having cleaning function is provided.

[0025] Figure 5 A structure diagram of a device for collecting exhaust gas and having cleaning function is provided. Figure 1 A structure diagram of a device for collecting exhaust gas and having cleaning function is provided.

[0026] Figure 6 A structure diagram of a device for collecting exhaust gas and having cleaning function is provided.Figure 5 Structure diagram of another perspective view;

[0027] Figure 7 For Figure 6 Structure exploded diagram of inner filter cartridge and outer filter cartridge;

[0028] Figure 8 For Figure 7 Structure diagram of another perspective view;

[0029] Figure 9 For Figure 6 Structure exploded diagram of inner filter cartridge;

[0030] Figure 10 For Figure 9 Structure diagram of another perspective view;

[0031] Figure 11 For Figure 10 Structure exploded enlarged diagram of rotating ring;

[0032] Figure 12 For Figure 4 Structure enlarged diagram of a part;

[0033] Figure 13 For Figure 4 Structure enlarged diagram of b part.

[0034] In the figure: 1, shell; 2, fixed ring; 3, diffusion ring; 4, outer filter cartridge; 5, inner filter cartridge; 6, electric telescopic rod; 7, sliding block; 8, screw rod; 9, mounting frame; 10, rotating ring; 11, protruding block; 12, mounting ring; 13, soft brush; 14, scraping strip; 15, connecting ring; 16, inner gear ring; 17, driving gear ring; 18, spiral rod; 19, connecting groove; 20, connecting rod; 21, spring; 22, inner ring; 23, connecting frame; 24, scraping plate; 25, dust removal groove; 26, butt joint ring; 27, butt joint disc one; 28, butt joint disc two; 29, servo motor; 30, corrugated pipe one; 31, positioning disc; 32, corrugated pipe two. DETAILED DESCRIPTION

[0035] With reference to Figures 1-3The utility model provides a kind of collection exhaust gas and the equipment with cleaning function, including shell 1, shell 1 bottom is equipped with air inlet, shell 1 is also equipped with exhaust port, air inlet and exhaust port are equipped with flowmeter, flowmeter is used for real-time monitoring to gas flow, the flowmeter in specific air inlet is used for real-time monitoring to the air intake of exhaust gas, the flowmeter in exhaust port is used for real-time monitoring to the discharge of gas after primary filtration, by comparing the flow of two flowmeters, then the filtering effect and the degree of blockage of the equipment can be known, when air intake and discharge are always in certain interval, it indicates that primary filtration effect is normal and the equipment is not blocked, when air intake and discharge are less different, consider that the primary filtration effect of the equipment is poor or the content of large particle dust in exhaust gas is less, when air intake and discharge are greatly different, then consider that the content of large particle dust in exhaust gas is more or the equipment is blocked, different data difference is handled differently to maintain the normal operation of the equipment, when data difference is in certain interval or data difference is less, the normal operation of the equipment is maintained, when data difference is larger, the filtering area of the equipment is increased, if subsequent data difference is still larger, the dust in the equipment is cleaned, flowmeter is existing product, its working principle and specific structure are not described here.

[0036] Refer to Figures 1-13 A kind of collection exhaust gas and the equipment with cleaning function, it also includes fixed ring 2, fixed ring 2 is fixedly installed in shell 1, one end near air inlet, fixed ring 2 is fixedly installed with outer filter drum 4 on diffusion ring 3, and outer filter drum 4 is slidably installed with inner filter drum 5, the bottom of fixed ring 2 is horn-shaped, diffusion ring 3 is funnel-shaped, the horn-shaped opening of the bottom of fixed ring 2 can let exhaust gas from fixed ring 2 middle part enter diffusion ring 3 smoothly, the funnel-shaped setting of diffusion ring 3 can let exhaust gas diffuse from middle to outside, so that it can move along the inner wall of outer filter drum 4, so that exhaust gas can effectively pass through the filtration of outer filter drum 4, outer filter drum 4 and inner filter drum 5 are all provided with corresponding number of filter holes, and the filter hole positions on the two are opposite, inner filter drum 5 can slide up and down relative to outer filter drum 4, adjust the size of filtering space in shell 1, when inner filter drum 5 and outer filter drum 4 overlap, filtering area is minimum, at this time, primary filtration treatment that normal air intake flow is adapted, when inner filter drum 5 is stretched upwards on outer filter drum 4, filtering area is maximum, at this time, primary filtration treatment that exhaust gas air intake and air intake and discharge are greatly different is adapted;

[0037] A plurality of sliding blocks 7 are fixedly installed on the side wall of the inner filter cylinder 5, a plurality of sliding grooves corresponding to the sliding blocks 7 are formed on the inner wall of the outer filter cylinder 4, and the depth of the sliding grooves is less than the height of the outer filter cylinder 4. The cooperation of the sliding blocks 7 and the sliding grooves is used to limit the moving direction of the inner filter cylinder 5 on the outer filter cylinder 4, and at the same time, the depth of the sliding grooves can avoid the separation of the inner filter cylinder 5 and the outer filter cylinder 4, thereby ensuring the filtering effect of large particles of dust. The top of the shell 1 is fixedly installed with an electric telescopic rod 6, the output end of the electric telescopic rod 6 is fixedly connected with the top of the inner filter cylinder 5, and the electric telescopic rod 6 is used to adjust the installation height of the inner filter cylinder 5 in the shell 1, so as to control the filtering area. The electric telescopic rod 6 is a product, and its working principle and specific structure are not described here.

[0038] A lead screw 8 is rotatably installed on the inner filter cylinder 5, and a mounting frame 9 is threadedly installed on the lead screw 8. A rotating ring 10 is fixedly installed at the lower end of the mounting frame 9. When the lead screw 8 rotates, the rotating ring 10 can be driven by the mounting frame 9 to move up and down along the inner filter cylinder 5. The length of the lead screw 8 is greater than or equal to the sum of the height of the inner filter cylinder 5 and the height of the outer filter cylinder 4. Through the design of the length of the lead screw 8, the rotating ring 10 can move from top to bottom in the filtering range after the filtering area is increased. 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 scraping strips 14 can be driven to move up and down at the same time, and the dust on the inner wall of the outer filter cylinder 4 and the inner filter cylinder 5 can be scraped. A plurality of connecting grooves 19 are formed on the side wall of the rotating ring 10, and a connecting rod 20 fixedly connected with a corresponding scraping strip 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 scraping strip 14 can extend outward relative to the rotating ring 10, so as to ensure the scraping effect of the scraping strip 14 on the dust on the inner wall of the outer filter cylinder 4.

[0039] A servo motor 29 is also fixedly installed on the top of the shell 1. An abutting plate is fixedly installed on the output end of the servo motor 29. An abutting disc two 28 matched with the abutting plate is fixedly installed on the top of the lead screw 8. When the electric telescopic rod 6 moves the inner filter cylinder 5 to the maximum position in the shell 1, the abutting disc two 28 is clamped with the abutting plate. At this time, the operation of the servo motor 29 can drive the lead screw 8 to rotate, thereby driving the rotating ring 10 to move up and down. The servo motor 29 is a product, and its working principle and specific structure are not described here.

[0040] The controller is fixedly installed on the shell 1, and an input end of the controller is electrically connected with the flow meters, and an output end of the controller is electrically connected with the electric telescopic rod 6 and the servo motor 29. The controller can adopt an existing PLC controller, and the working principle and specific structure are not described 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 of the two flow meters, so that the device automatically completes the adjustment of the filtering area and the cleaning of the dust. Specifically, when the air inlet flow is large or the air inlet flow and the air outlet flow are greatly different, the controller first makes the electric telescopic rod 6 work to move the inner filter cylinder 5 upwards to increase the filtering area. After working for a period of time, if the air inlet flow and the air outlet flow are still greatly different, the servo motor 29 is then made to work to clean the large particles of dust accumulated in the outer filter cylinder 4 and the inner filter cylinder 5. After that, when the air inlet flow decreases and the air inlet flow and the air outlet flow are within a specified range, the controller first makes the servo motor 29 work in reverse to reset the rotating ring 10, and then controls the electric telescopic rod 6 to move the inner filter cylinder 5 downwards to reset. By designing a step to increase the filtering area, the problem of poor initial filtering effect when the air inlet flow increases can be effectively solved. At the same time, when the filtering area is the smallest, the inner filter cylinder 5 is used to filter the dust, and the outer filter cylinder 4 can basically remain clean. Therefore, when the inner filter cylinder 5 is blocked, the outer filter cylinder 4 can filter the dust by increasing the filtering area, thereby avoiding the problem of air backflow caused by the inner filter cylinder 5 and the outer filter cylinder 4 being blocked.

[0041] The mounting ring 12 is rotatably installed at the bottom of the rotating ring 10, a plurality of soft bristles 13 are fixedly installed on the side wall of the mounting ring 12, the connecting ring 15 is fixedly installed on the top of the mounting ring 12, and the annular groove in sealing rotation cooperation with the connecting ring 15 is formed in the bottom wall of the rotating ring 10. During the up-and-down movement of the rotating ring 10, the mounting ring 12 can be moved simultaneously. At this time, the movement of the soft bristles 13 can dredge the filter holes. When the soft bristles 13 move, part of the dust may be pushed out of the filter holes to the outside of the outer filter cylinder 4 and fall between the shell 1 and the diffusion ring 3. Since the shapes of the outer filter cylinder 4 and the inner filter cylinder 5 are set, the gas filtered therefrom is difficult to blow the dust falling between the shell 1 and the diffusion ring 3. Therefore, a cleaning port that can be sealed is formed in 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.

[0042] The inner wall of the rotating ring 10 is fixedly provided with a protrusion 11, and the protrusion 11 is provided with a driving assembly matched with the mounting ring 12. The driving assembly is composed of an inner gear ring 16, a driving gear ring 17, a screw rod 18 and a guide block. The inner gear ring 16 is fixedly installed on the connecting ring 15. The driving gear ring 17 is rotatably installed in the protrusion 11 and is engaged with the inner gear ring 16. The screw rod 18 is fixedly installed in the housing 1 and is sealingly and slidably matched with the inner filter cylinder 5. The guide block is fixedly installed on the inner wall of the driving gear ring 17 and is matched with the helical groove on the screw rod 18. When the rotating ring 10 drives the mounting ring 12 to move up and down, the driving gear ring 17 can rotate in the protrusion 11 through the matching of the helical groove on the screw rod 18 and the guide block. At this time, the mounting ring 12 can be simultaneously rotated in the process of moving up and down through the engagement effect of the driving gear ring 17 and the inner gear ring 16. Therefore, the soft bristles 13 can effectively clean the inner wall of the outer filter cylinder 4 and the inner filter cylinder 5. In addition, the scraping strip 14 can also be installed on the side wall of the mounting ring 12 and located above the soft bristles 13. At this time, in the moving process of the rotating ring 10, the scraping strip 14 also moves up and down along the inner wall of the inner filter cylinder 5 and the outer filter cylinder 4 in a helical manner, further improving the cleaning effect of dust and facilitating the cleaning of firmly attached dust.

[0043] The inner ring 22 is fixedly installed on the fixed ring 2, and a collection groove is formed between the inner ring 22 and the diffusion ring 3. The collection groove is used for collecting scraped dust. Due to the shape of the diffusion ring 3, the scraped dust can be guided to fall into the collection groove as much as possible, avoiding invalid cleaning caused by the exhaust gas blowing again, and facilitating unified treatment of the scraped dust.

[0044] A dust removal groove 25 is formed in the side wall of the fixed ring 2 and communicates with the collection groove. A sealing plate matched with the dust removal groove 25 is sealingly connected to the side wall of the housing 1. A connecting frame 23 is rotatably installed on the inner ring 22 and fixedly provided with a scraping plate 24 matched with the collection groove. When the connecting frame 23 rotates, the dust falling into the collection groove can be gathered and pushed into the dust removal groove 25 by the scraping plate 24. Then, the dust in the dust removal groove 25 can be discharged by opening the sealing plate regularly, which is simple to operate.

[0045] The bottom of the screw rod 8 is fixedly provided with a butt joint disc I 27, and the top of the connecting frame 23 is fixedly provided with a butt joint ring 26 matched with the butt joint disc I 27. When the inner filter cylinder 5 moves up, it drives the screw rod 8 to move up at the same time. When the butt joint disc II 28 is connected with the butt joint plate due to the upward movement of the inner filter cylinder 5, the butt joint disc I 27 is also connected with the butt joint ring 26. Therefore, when the servo motor 29 works, it can not only drive the upward and downward movement of the rotating ring 10, but also drive the rotation of the connecting frame 23.

[0046] A bellows 30 for sealing the screw rod 8 is mounted between the docking disc 27 and the mounting frame 9, and a positioning disc 31 is fixedly mounted at the bottom of the screw rod 18, and a bellows 32 for sealing the screw rod 18 is mounted between the positioning disc 31 and the inner filter cartridge 5 and between the inner filter cartridge 5 and the housing 1, and the bellows 30 and the bellows 32 are designed for dustproofing of the screw rod 8 and the screw rod 18, and can ensure the transmission and guiding effects of the two.

[0047] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A device for 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 fixed ring (2), the fixed 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 fixed 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), the inner ring (22) is fixedly mounted on the fixed ring (2), and a collection groove is formed between the inner ring (22) and the diffusion ring (3), the collection groove being used to collect 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 matching the dust removal groove (25) is sealed and clamped on the side wall of the housing (1), a connecting frame (23) is rotatably mounted on the inner ring (22), and a scraper (24) matching the collection groove is fixedly mounted on the bottom of the connecting frame (23); 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) so that the docking plate 2 (28) and the docking plate are engaged with each other.

2. The device for collecting and cleaning waste gas 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 and cleaning waste gas 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 and cleaning waste gas 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 and cleaning waste gas 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 and cleaning waste gas according to claim 1, 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).

7. The device for collecting and cleaning waste gas 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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