Treatment apparatus for treating exhaust gas having a complex composition
The combination of a dust cover, cylindrical tube, rotating shaft and scraper automatically collects and discharges particulate matter and dust in the exhaust gas, solving the problem of filter screen accumulation and ensuring the continuous and efficient operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI HONGYOU ENVIRONMENTAL TECHNOLOGY CO LTD
- Filing Date
- 2026-05-14
- Publication Date
- 2026-06-12
Smart Images

Figure CN122183281A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of waste gas treatment technology, and in particular to treatment equipment for treating waste gases with complex compositions. Background Technology
[0002] Waste gas treatment refers to the treatment of waste gases generated in industrial, production, energy production, or other activities to reduce or remove harmful substances, thereby protecting air quality and mitigating adverse effects on the environment and health. Common waste gas purification methods include factory smoke and dust purification, workshop dust purification, organic waste gas purification, acid and alkali waste gas purification, chemical waste gas purification, and odor removal purification. Due to the diverse nature of waste gas generation and the complex composition of many waste gases, the composition of waste gases generated at different times often varies, which has a significant impact on treatment and may prevent the waste gas treatment from achieving the desired effect, thus harming environmental protection.
[0003] Existing exhaust gases contain particulate matter and dust. Usually, filters are installed inside the equipment to filter out the particulate matter and dust in the exhaust gas. However, the filtered particulate matter and dust will accumulate on the filter screen. As the particulate matter and dust continue to accumulate, they will gradually affect the filtration effect of the filter screen, thereby affecting the treatment effect of the exhaust gas treatment equipment. Summary of the Invention
[0004] The purpose of this invention is to address the following shortcomings in the prior art: after filtration, particulate matter and dust accumulate on the filter screen, and as particulate matter and dust continue to accumulate, they gradually affect the filtration effect of the filter screen, thereby affecting the treatment effect of the waste gas treatment equipment. Therefore, this invention proposes a treatment equipment for treating waste gas with complex composition.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A treatment device for treating complex waste gas includes a treatment tank, an inlet pipe and an outlet pipe fixedly connected to the treatment tank, a dust cover installed inside the treatment tank by an installation assembly, a fixing ring installed at the center of the dust cover, a cylindrical tube with a sealed top fixedly installed inside the fixing ring, the lower end of the cylindrical tube protruding from the lower end of the treatment tank, and the dust cover being conical. The cylindrical tube has multiple collection ports on its side wall, all of which are connected to the interior, and all of the collection ports are flush with the upper surface of the fixing ring. The upper end of the cylindrical tube has a rotating hole, and a rotating shaft is rotatably installed in the rotating hole. A cross is fixedly installed on the rotating shaft. Multiple vertical rods are vertically fixedly installed on the lower surface of the cross. Scrapers are fixedly installed at the lower ends of the multiple vertical rods. The lower ends of the scrapers slide in contact with the upper surface of the fixing ring. A drive motor is fixedly installed at the upper end of the processing tank. The output shaft of the drive motor is fixedly connected to the rotating shaft.
[0006] As a preferred embodiment, the rotating shaft is partially provided with reciprocating threads, a lifting block is threaded onto the rotating shaft, an installation plate is symmetrically fixedly installed on the lifting block, an isolation cover is fixedly installed on the lower surface of the installation plate by two first spring rods, a circular hole is provided on the isolation cover, the rotating shaft is inserted into the circular hole, a sealing component for sealing itself is provided at each of the multiple collection ports, and a limiting component for restricting the rotation of the isolation cover is provided inside the treatment tank.
[0007] As a preferred embodiment, the sealing assembly includes a mounting base fixedly installed inside a cylindrical tube, two second spring rods vertically fixedly installed on the mounting base, a blocking block fixedly installed on the upper end of the two second spring rods, and a transmission component. The blocking block coincides with the collection port, and the transmission component is used to simultaneously drive multiple blocking blocks to move vertically downward.
[0008] As a preferred embodiment, the cylindrical tube has symmetrically arranged strip-shaped holes on its sidewalls, each communicating with the interior. The transmission component includes a connecting frame fixedly mounted on multiple blocks, two L-shaped rods symmetrically fixedly mounted on the lower surface of the connecting frame, a movable rod vertically fixedly mounted on the two L-shaped rods, two telescopic springs respectively fitted onto the two movable rods, and two top rods respectively fixedly mounted on two mounting plates. The two L-shaped rods are slidably inserted into the two strip-shaped holes. The fixed ring has symmetrically arranged movable holes, and the two movable rods are slidably inserted into the two movable holes. The upper surface of the isolation cover has symmetrically arranged sliding holes. One end of each of the two top rods passes through the two sliding holes. The top rods are located directly above the movable rods. The two ends of the telescopic springs are fixedly connected to the fixed ring and the L-shaped rods respectively.
[0009] As a preferred embodiment, both mounting plates have limit holes, and the limiting component includes two limit rods that are slidably inserted into the two limit holes, with both limit rods fixedly installed at the upper end of the processing tank.
[0010] As a preferred embodiment, the mounting assembly includes a mounting ring fixedly mounted inside the treatment tank, a connecting ring fixedly mounted on a dust cover, and multiple sets of bolt fasteners mounted on the mounting ring and the connecting ring.
[0011] As a preferred embodiment, a vibration ring is fixedly installed on the dust cover, and L-shaped support rods are symmetrically fixedly installed on the vibration ring. A transmission ring is fixedly installed at one end of the two support rods that are close to each other, and the transmission ring is provided with a vibration component for driving itself to shake.
[0012] As a preferred embodiment, the vibration assembly includes a plurality of elastic rods fixedly mounted on a transmission ring and a baffle fixedly mounted on a rotating shaft. The plurality of elastic rods are arranged equidistantly on the inner ring of the transmission ring, and one end of the baffle is in intermittent contact with one end of the plurality of elastic rods.
[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. Exhaust gas enters the treatment tank through the inlet pipe. Particulate matter and dust in the exhaust gas are filtered by a dust cover. The particulate matter and dust filtered by the dust cover are automatically collected and discharged through the cooperation of the cylindrical tube, collection port, rotating shaft, cross, vertical rod, scraper and drive motor. This prevents particulate matter and dust from accumulating on the dust cover, affecting its use, and ensuring the treatment effect of the exhaust gas treatment equipment.
[0014] 2. In the initial state, the collection port is blocked by the blockage. When the isolation cover comes into contact with the fixed ring through the reciprocating thread, the limiting component and the rotating shaft, it will drive multiple blockages to move vertically downward through the transmission component, thereby opening the collection port and collecting particulate matter and dust. At the same time as the collection port opens, the isolation cover and the fixed ring form a sealed space to prevent the exhaust gas in the treatment tank from being discharged through the collection port.
[0015] 3. As the rotating shaft rotates, the vibration assembly, transmission ring, support rod and vibration ring work together to make the dust cover shake. Under the shaking, the particles and dust on the dust cover can slide off onto the fixed ring, further preventing the particles and dust from accumulating on the dust cover. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the treatment equipment for treating complex waste gas proposed in this invention. Figure 2 This is a three-dimensional cross-sectional structural diagram of the treatment equipment for treating complex waste gas proposed in this invention; Figure 3 A three-dimensional partial structural diagram of the mounting components, dust cover, isolation cover, vibration assembly, rotating shaft, and cylindrical tube; Figure 4 A schematic diagram of a three-dimensional partial cross-sectional structure of the fixing ring, isolation cover, cylindrical tube, and scraper; Figure 5 A schematic diagram of a three-dimensional partial cross-sectional structure of the cylindrical tube, sealing assembly, and rotating shaft; Figure 6 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 7 for Figure 3 Enlarged structural diagram at point B; Figure 8 for Figure 5 Enlarged structural diagram at point C.
[0017] In the diagram: 1. Processing tank, 2. Inlet pipe, 3. Outlet pipe, 4. Dustproof cover, 5. Fixing ring, 6. Cylindrical tube, 7. Collection port, 8. Rotating shaft, 9. Cross, 10. Vertical rod, 11. Scraper, 12. Drive motor, 13. Reciprocating thread, 14. Lifting block, 15. Mounting plate, 16. Isolation cover, 17. Mounting base, 18. Second spring rod, 19. Block, 20. Connecting frame, 21. L-shaped rod, 22. Moving rod, 23. Telescopic spring, 24. Top rod, 25. Limiting rod, 26. Mounting ring, 27. Connecting ring, 28. Bolt fastener, 29. Vibration ring, 30. Support rod, 31. Transmission ring, 32. Elastic rod, 33. Baffle, 34. First spring rod. Detailed Implementation
[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0019] Reference Figures 1-8 A treatment device for treating complex waste gas includes a treatment tank 1. An inlet pipe 2 and an outlet pipe 3 are fixedly connected to the treatment tank 1. A dust cover 4 is installed inside the treatment tank 1 through an installation assembly. A fixing ring 5 is installed at the center of the dust cover 4. A cylindrical cylinder 6 with a sealed top is fixedly installed inside the fixing ring 5. The lower end of the cylindrical cylinder 6 extends out from the lower end of the treatment tank 1. The dust cover 4 is conical. Multiple collection ports 7, all connected to the interior, are opened on the side wall of the cylindrical cylinder 6. All collection ports 7 are flush with the upper surface of the fixing ring 5.
[0020] The dust cover 4 is a filter device that can filter particulate matter and dust in exhaust gas. It is installed in the treatment tank 1 by the installation assembly. The dust cover 4 is conical in shape in the treatment tank 1, with the center located below the edge. Exhaust gas enters the treatment tank 1 through the inlet pipe 2 and is located above the dust cover 4. When the exhaust gas passes through the dust cover 4, the particulate matter and dust in the exhaust gas can be filtered out by the dust cover 4. The filtered gas can be discharged through the outlet pipe 3 and enter the next treatment process.
[0021] A rotating hole is provided at the upper end of the cylindrical tube 6. A rotating shaft 8 is rotatably installed in the rotating hole. A cross 9 is fixedly installed on the rotating shaft 8. Multiple vertical rods 10 are vertically fixedly installed on the lower surface of the cross 9. Scrapers 11 are fixedly installed at the lower ends of the multiple vertical rods 10. The lower ends of the scrapers 11 slide in contact with the upper surface of the fixing ring 5. A drive motor 12 is fixedly installed at the upper end of the processing tank 1. The output shaft of the drive motor 12 is fixedly connected to the rotating shaft 8.
[0022] A rotating shaft 8 is vertically mounted inside a cylindrical tube 6. The upper end of the cylindrical tube 6 is sealed, and the lower end leads to the processing tank 1. Multiple scrapers 11 are mounted on the rotating shaft 8 via vertical rods 10 and crossbars 9. When the rotating shaft 8 rotates, it drives the multiple scrapers 11 to rotate on the fixed ring 5. The lower end of the scraper 11 slides in contact with the upper surface of the fixed ring 5, while the side of the scraper 11 slides in contact with the side of the cylindrical tube 6. The angle between the tangent of the scraper 11 and the cylindrical tube 6 is an acute angle. The particles and dust filtered by the dust cover 4 will slide off the inclined surface of the dust cover 4 onto the fixed ring 5. Simultaneously, the drive motor 12 is started, driving the rotating shaft 8 to rotate. During the rotation of the rotating shaft 8, multiple scrapers 11 will be driven by the cross 9 and the vertical rod 10 to scrape on the fixed ring 5. During the scraping process, the scrapers 11 will push the particles and dust accumulated on the fixed ring 5 to the collection port 7 and fall into the cylindrical cylinder 6. The particles and dust will be discharged outside the treatment tank 1 through the cylindrical cylinder 6, automatically realizing the collection and discharge of particles and dust, avoiding the accumulation of particles and dust on the dust cover 4, affecting the use of the dust cover 4, and ensuring the treatment effect of the exhaust gas treatment equipment.
[0023] A reciprocating thread 13 is partially provided on the rotating shaft 8. A lifting block 14 is threaded onto the rotating shaft 8. Mounting plates 15 are symmetrically fixed on the lifting blocks 14. An isolation cover 16 is fixedly installed on the lower surface of the mounting plate 15 through two first spring rods 34. A round hole is provided on the isolation cover 16. The rotating shaft 8 is inserted into the round hole. Each of the multiple collection ports 7 is provided with a sealing component for sealing itself. A limiting component for limiting the rotation of the isolation cover 16 is provided inside the treatment tank 1. Limiting holes are provided on both mounting plates 15. The limiting component includes two limiting rods 25 that are slidably inserted into the two limiting holes respectively. Both limiting rods 25 are fixedly installed on the upper end of the treatment tank 1.
[0024] The lifting block 14 is threaded onto the reciprocating thread 13 on the rotating shaft 8. Under the action of the limiting rod 25, the two mounting plates 15 installed on the lifting block 14 can only move vertically up and down along the limiting rod 25. Thus, the lifting block 14 will not rotate with the rotating shaft 8, but can only move up and down. When the two mounting plates 15 move up and down, they will drive the isolation cover 16 to move up and down through the two first spring rods 34. When the isolation cover 16 contacts the fixed ring 5, the lifting block 14 will continue to move downward. At this time, the first spring rods 34 begin to compress. When the isolation cover 16 contacts the fixed ring 5, a sealed space will be formed between the isolation cover 16 and the fixed ring 5, which can prevent the waste gas in the treatment tank 1 from entering the cylindrical cylinder 6 through the collection port 7.
[0025] The sealing assembly includes a mounting base 17 fixedly installed inside the cylindrical tube 6, two second spring rods 18 vertically fixedly installed on the mounting base 17, a blocking block 19 fixedly installed on the upper end of the two second spring rods 18, and a transmission component. The blocking block 19 coincides with the collection port 7. The transmission component is used to simultaneously drive multiple blocking blocks 19 to move vertically downward. The cylindrical tube 6 has symmetrically opened strip-shaped holes on its side wall, each communicating with the interior. The transmission component includes a connecting frame 20 fixedly installed on multiple blocking blocks 19, two L-shaped rods 21 symmetrically fixedly installed on the lower surface of the connecting frame 20, and two L-shaped rods 21 vertically fixedly installed on the two second spring rods 18. The L-shaped rod 21 has a movable rod 22, two telescopic springs 23 respectively fitted onto the two movable rods 22, and two top rods 24 respectively fixedly installed on the two mounting plates 15. The two L-shaped rods 21 are slidably inserted into the two strip holes. The fixed ring 5 has symmetrical movable holes. The two movable rods 22 are slidably inserted into the two movable holes. The upper surface of the isolation cover 16 has symmetrical sliding holes. One end of the two top rods 24 passes through the two sliding holes respectively. The top rods 24 are located directly above the movable rods 22. The two ends of the telescopic springs 23 are fixedly connected to the fixed ring 5 and the L-shaped rods 21 respectively.
[0026] Under the action of the second spring rod 18, the blocking block 19 coincides with the collection port 7, thereby blocking the collection port 7. One end of the top rod 24 mounted on the mounting plate 15 is located directly above the moving rod 22. When the mounting plate 15 moves the isolation cover 16 towards the fixing ring 5, it will move the top rod 24 closer to the moving rod 22. When the isolation cover 16 contacts the fixing ring 5, the top rod 24 just contacts the moving rod 22, and the first spring rod 34 is compressed. When the mounting plate 15 continues to move downward, the top rod 24 will move the moving rod 22 vertically downward, and the telescopic spring 23 will be stretched. At this time, the moving rod 22 will move the L-shaped rod 21 vertically downward. The scraper moves downward and drives the connecting frame 20 to move vertically downward through the L-shaped rod 21, thereby driving multiple blocking blocks 19 to move vertically downward. When the blocking blocks 19 move vertically downward, they will be offset from the collection port 7, thus automatically opening multiple collection ports 7. During the rotation of the scraper 11, it will push the particles and dust on the fixing ring 5 to the collection port 7 and enter the cylindrical tube 6. When multiple collection ports 7 are open, the isolation cover 16 can cover multiple collection ports 7 in the sealed space formed by the isolation cover 16 and the fixing ring 5, preventing the exhaust gas in the treatment tank 1 from passing through the collection port 7 and being discharged outside the treatment tank 1 when the collection port 7 is open.
[0027] The mounting components include a mounting ring 26 fixedly installed inside the treatment tank 1, a connecting ring 27 fixedly installed on the dust cover 4, and multiple sets of bolt fasteners 28. The multiple sets of bolt fasteners 28 are installed on the mounting ring 26 and the connecting ring 27. The dust cover 4 is fixedly installed inside the treatment tank 1 by the mounting ring 26 and the connecting ring 27, and the mounting ring 26 and the connecting ring 27 are connected together by the bolt fasteners 28. When the dust cover 4 is damaged, the connecting ring 27 and the mounting ring 26 can be easily disassembled by the bolt fasteners 28, and the dust cover 4 can be replaced. The operation is simple.
[0028] A vibration ring 29 is fixedly installed on the dust cover 4. An L-shaped support rod 30 is symmetrically fixedly installed on the vibration ring 29. A transmission ring 31 is fixedly installed at one end of the two support rods 30 that are close to each other. The transmission ring 31 is provided with a vibration component for driving itself to shake. The vibration ring 29 is installed on the dust cover 4. The vibration component includes multiple elastic rods 32 fixedly installed on the transmission ring 31 and baffles 33 fixedly installed on the rotating shaft 8. The multiple elastic rods 32 are equidistantly arranged on the inner ring of the transmission ring 31. One end of the baffle 33 is in intermittent contact with one end of the multiple elastic rods 32.
[0029] The transmission ring 31 is sleeved on the rotating shaft 8 via the vibration ring 29 and the support rod 30. When the drive motor 12 drives the rotating shaft 8 to rotate, the rotating shaft 8 will drive the baffle 33 to rotate around the rotating shaft 8. When the baffle 33 rotates, one end of it will contact one end of the elastic rod 32. The elastic rod 32 is made of elastic material. When the baffle 33 contacts the elastic rod 32, it will cause the elastic rod 32 to undergo elastic deformation. At the same time, the baffle 33 will separate from one end of the elastic rod 32 as it rotates. When the baffle 33 separates from the elastic rod 32, the elastic rod 32 will quickly return to its original shape under its own elasticity and generate vibration. Then, the vibration is transmitted to the vibration ring 29 through the transmission ring 31 and the support rod 30, causing the vibration ring 29 to vibrate and drive the dust cover 4 to shake. Under the shaking, the particles and dust on the dust cover 4 can slide onto the fixing ring 5, further preventing the particles and dust from accumulating on the dust cover 4.
[0030] In this invention, the particulate matter and dust filtered by the dust cover 4 will slide off the inclined surface of the dust cover 4 onto the fixing ring 5. At the same time, the drive motor 12 is started, driving the rotating shaft 8 to rotate. During the rotation of the rotating shaft 8, multiple scrapers 11 will be driven by the cross 9 and the vertical rod 10 to scrape on the fixing ring 5. During the scraping process, the scrapers 11 will push the particulate matter and dust accumulated on the fixing ring 5 to the collection port 7 and fall into the cylindrical cylinder 6. The particulate matter and dust will be discharged outside the treatment tank 1 through the cylindrical cylinder 6, which automatically realizes the collection and discharge of particulate matter and dust, avoids the accumulation of particulate matter and dust on the dust cover 4, and ensures the treatment effect of the exhaust gas treatment equipment.
[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A treatment device for treating waste gas with complex composition, comprising a treatment tank (1), characterized in that, An air inlet pipe (2) and an air outlet pipe (3) are fixedly connected to the processing tank (1). A dust cover (4) is installed inside the processing tank (1) through an installation assembly. A fixing ring (5) is installed at the center of the dust cover (4). A cylindrical tube (6) with a sealed top is fixedly installed on the inner ring of the fixing ring (5). The lower end of the cylindrical tube (6) passes through the lower end of the processing tank (1). The dust cover (4) is conical. The cylindrical tube (6) has multiple collection ports (7) on its side wall, all of which are connected to the interior. The multiple collection ports (7) are flush with the upper surface of the fixing ring (5). The upper end of the cylindrical tube (6) is provided with a rotating hole, and a rotating shaft (8) is rotatably installed in the rotating hole. A cross (9) is fixedly installed on the rotating shaft (8). Multiple vertical rods (10) are vertically fixedly installed on the lower surface of the cross (9). A scraper (11) is fixedly installed at the lower end of each of the multiple vertical rods (10). The lower end of the scraper (11) slides in contact with the upper surface of the fixing ring (5). A drive motor (12) is fixedly installed at the upper end of the processing tank (1). The output shaft of the drive motor (12) is fixedly connected to the rotating shaft (8).
2. The treatment equipment for treating complex waste gas according to claim 1, characterized in that, The rotating shaft (8) is partially provided with a reciprocating thread (13), and a lifting block (14) is threaded onto the rotating shaft (8). An installation plate (15) is symmetrically fixed on the lifting block (14). An isolation cover (16) is fixedly installed on the lower surface of the installation plate (15) through two first spring rods (34). A round hole is provided on the isolation cover (16), and the rotating shaft (8) is inserted into the round hole. A sealing component for sealing itself is provided at each of the multiple collection ports (7). A limiting component for restricting the rotation of the isolation cover (16) is provided inside the treatment tank (1).
3. The treatment equipment for treating complex waste gas according to claim 2, characterized in that, The sealing assembly includes a mounting base (17) fixedly installed inside the cylindrical tube (6), two second spring rods (18) fixedly installed vertically on the mounting base (17), a blocking block (19) fixedly installed on the upper end of the two second spring rods (18), and a transmission component. The blocking block (19) coincides with the collection port (7), and the transmission component is used to simultaneously drive multiple blocking blocks (19) to move vertically downward.
4. The treatment equipment for treating complex waste gas according to claim 3, characterized in that, The cylindrical tube (6) has symmetrically arranged strip-shaped holes on its side wall, each of which is connected to the interior. The transmission component includes a connecting frame (20) fixedly installed on multiple plugs (19), two L-shaped rods (21) symmetrically fixedly installed on the lower surface of the connecting frame (20), a moving rod (22) vertically fixedly installed on the two L-shaped rods (21), two telescopic springs (23) respectively sleeved on the two moving rods (22), and two top rods (24) respectively fixedly installed on two mounting plates (15). The two L-shaped rods (21) are slidably inserted into the two strip holes respectively. The fixed ring (5) has symmetrically opened moving holes. The two moving rods (22) are slidably inserted into the two moving holes respectively. The upper surface of the isolation cover (16) has symmetrically opened sliding holes. One end of the two top rods (24) passes through the two sliding holes respectively. The top rod (24) is located directly above the moving rod (22). The two ends of the telescopic spring (23) are fixedly connected to the fixed ring (5) and the L-shaped rod (21) respectively.
5. The treatment equipment for treating complex waste gas according to claim 2, characterized in that, Both mounting plates (15) have limit holes. The limiting component includes two limit rods (25) that are slidably inserted into the two limit holes respectively. Both limit rods (25) are fixedly installed on the upper end of the processing tank (1).
6. The treatment equipment for treating complex waste gas according to claim 1, characterized in that, The mounting assembly includes a mounting ring (26) fixedly mounted inside the processing tank (1), a connecting ring (27) fixedly mounted on the dust cover (4), and multiple sets of bolt fasteners (28), which are mounted on the mounting ring (26) and the connecting ring (27).
7. The treatment equipment for treating complex waste gas according to claim 1, characterized in that, A vibration ring (29) is fixedly installed on the dust cover (4). An L-shaped support rod (30) is symmetrically fixedly installed on the vibration ring (29). A transmission ring (31) is fixedly installed at one end of the two support rods (30) that are close to each other. A vibration component for driving itself to shake is provided on the transmission ring (31).
8. The treatment equipment for treating complex waste gas according to claim 7, characterized in that, The vibration assembly includes multiple elastic rods (32) fixedly mounted on the transmission ring (31) and baffles (33) fixedly mounted on the rotating shaft (8). The multiple elastic rods (32) are equidistantly arranged on the inner ring of the transmission ring (31), and one end of the baffle (33) is in intermittent contact with one end of the multiple elastic rods (32).