Epoxy powder coating production waste gas harmless treatment device

Abstract

The application belongs to the technical field of waste gas harmless treatment, in particular to an epoxy powder coating production waste gas harmless treatment device, which comprises a filter box, a plane filter plate is embedded in the filter box, gas collecting equipment is arranged on the top of the filter box and corresponds to the plane filter plate; a first horizontal moving seat is arranged below the plane filter plate, a strip-shaped nozzle is clamped on the first horizontal moving seat, and the top of the strip-shaped nozzle is slidably connected to the bottom of the plane filter plate; in the application, the airflow is guided from top to bottom and the U-shaped pipe is designed to turn, so that the waste gas forms a clear and coherent flow path in the filter box, the primary filtration is closely connected with the secondary water vortex filtration, the airflow dead angle is effectively eliminated, the overall filtration efficiency is improved, the gas-liquid turbulent contact is significantly strengthened by the secondary water vortex filtration mode, the fine dust can be efficiently captured, the soluble harmful components can be simultaneously removed, and thus the purification depth and emission safety are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of waste gas harmless treatment technology, specifically a device for harmless treatment of waste gas from epoxy powder coating production. Background Technology

[0002] The waste gas generated during the production and use of epoxy powder coatings can be mainly divided into two categories: dust and organic waste gas.

[0003] Existing technologies disclose several invention patents in the field of harmless treatment of waste gas. Among them, invention patent with publication number CN117861336B discloses a purification device for the production of interior and exterior wall coatings, including a purification box. An air inlet pipe is provided on the lower right side of the purification box, and one end of the air inlet pipe is connected to the inside of the purification box. A filter plate is provided on the upper side of the air inlet pipe inside the purification box. A partition plate is fixedly installed in the middle of the upper part of the filter plate. When the filter plate descends, it also drives the partition plate to descend. The partition plate drives the gear shaft and the ball rod to descend. The ball rod slides in the spiral groove, which causes the ball rod to drive the gear shaft to rotate on the partition plate and the filter plate. The gear shaft also drives the scraper to rotate. The scraper helps to scrape off the dust adhering to the lower end of the filter plate, improving the permeability of the filter plate. The existing planar filter screen dust removal structure has inherent defects: as the filter resistance increases, the dust layer pressure drop increases sharply, and the filtration efficiency decreases exponentially. At the same time, its maintenance strategy is to replace it when it fails, and it cannot achieve online self-cleaning, resulting in the effective working time ratio being lower than the design threshold, which significantly affects the overall efficiency of the waste gas treatment system.

[0004] Based on this, the present invention designs a harmless treatment device for waste gas from epoxy powder coating production to solve the above problems. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a harmless treatment device for waste gas from epoxy powder coating production. This invention primarily addresses the inherent defects of existing planar filter-type dust collection structures: as filter resistance increases, the dust layer pressure drop increases sharply, and the filtration efficiency declines exponentially. Furthermore, its maintenance strategy relies on fault-based shutdown and replacement, failing to achieve online self-cleaning, resulting in an effective working time percentage below the design threshold, significantly impacting the overall efficiency of the waste gas treatment system.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a harmless treatment device for waste gas from epoxy powder coating production, including a filter box, a flat filter plate embedded in the filter box, and a gas collection device provided on the top of the filter box corresponding to the flat filter plate; a first transverse seat is provided below the flat filter plate, a strip nozzle is snapped onto the first transverse seat, the top of the strip nozzle is slidably connected to the bottom of the flat filter plate, a blower pipe is snapped onto the side wall of the filter box corresponding to the strip nozzle, one end of the blower pipe is connected to the bottom of the strip nozzle, a blower is provided on one side of the filter box, and the other end of the blower pipe is connected to the output end of the blower;

[0007] A second transverse sliding seat is provided above the planar filter plate. The top of the second transverse sliding seat has a combination opening, and a dust suction hood is embedded in the combination opening. A dust collection pipe is snapped onto the top of the filter box corresponding to the dust suction hood. The end of the dust collection pipe is connected to the top of the dust suction hood. A driving device is provided between the first transverse sliding seat and the second transverse sliding seat to drive the dust suction hood and the strip nozzle to move synchronously and reciprocally laterally at the top and bottom of the planar filter plate, respectively.

[0008] Preferably, the driving device includes a first threaded cylinder and a first sliding sleeve that are snapped onto the side of the first transverse seat. A first threaded rod is threadedly fitted inside the first threaded cylinder. The end of the first threaded rod is rotatably connected to the wall of the filter box. A first sliding rod is slidably inserted inside the first sliding sleeve. The end of the first sliding rod is snapped onto the wall of the filter box.

[0009] The second transverse sliding seat is respectively engaged with a second threaded cylinder and a second sliding sleeve. The second threaded cylinder is threaded with a second threaded rod. The end of the second threaded rod is rotatably connected to the wall of the filter box. The second sliding sleeve is slidably provided with a second sliding rod. The end of the second sliding rod is engaged with the wall of the filter box.

[0010] The ends of the first threaded rod and the second threaded rod are both fixedly sleeved with a first gear. A motor is installed on the front of the filter box. A second gear is fixedly sleeved on the output shaft of the motor. The second gear is connected to the two first gears through a toothed chain drive.

[0011] Preferably, the front and rear sidewalls of the combined port are provided with sliding grooves, and the two sliding grooves and the combined port are slidably fitted with a slide seat. The dust cover is fixedly connected to the inner side of the slide seat. Each sliding groove is embedded with a first spring, and the slide seat is elastically supported by the inner walls of the two sliding grooves through multiple first springs.

[0012] Preferably, the inner wall of the dust hood is fitted with a frame, the bottom of the frame is fitted with a plurality of sleeves, each sleeve has an adapter frame fitted into its top port, each adapter frame is rotatably connected to a first rotating shaft, and a first spiral blade is wound around the first rotating shaft.

[0013] A first bevel gear is fixedly sleeved at the top of the first rotating shaft. Each tooth surface of the first bevel gear meshes with a second bevel gear. A gear shaft is fixedly connected to the inner side of multiple second bevel gears. A first ratchet assembly and a second ratchet assembly are respectively provided at both ends of the gear shaft. The two ends of the gear shaft are rotatably connected to the front and back of the dust collection hood, respectively. The first ratchet assembly and the second ratchet assembly have the same structure. The rear wall and the front wall of the inner side of the filter box are both provided with strip grooves. A toothed plate is fixedly connected to the bottom of the inner side of one strip groove and the top of the inner side of the other strip groove. The two toothed plates mesh with the first ratchet assembly and the second ratchet assembly, respectively.

[0014] Preferably, the first ratchet assembly includes a third gear fixedly sleeved on the end of the gear shaft. The third gear meshes with the gear plate. A groove is formed on the side of the third gear near the dust hood. An internal tooth surface is provided on the inner sidewall of the groove. A ratchet is meshed on the internal tooth surface. The other end of the ratchet is rotatably connected to a connecting shaft. The other end of the connecting shaft is fixedly connected to the gear shaft. A second spring is sleeved on the connecting shaft. The ratchet and the connecting shaft form an elastic rotational engagement through the second spring.

[0015] Preferably, the bottom of the dust cover is provided with a U-shaped groove, the U-shaped groove is embedded with a U-shaped frame, and the top of the U-shaped frame is fixedly connected with a plurality of third springs. The U-shaped frame is elastically supported by the top of the inner side of the U-shaped groove through the plurality of third springs.

[0016] Each of the first rotating shafts has a combination groove at its bottom end, a keyway on the inner wall of the combination groove, a combination shaft inserted into the combination groove, a spline on the shaft surface of the combination shaft, and the combination shaft slidingly engaging with the keyway through the spline. A second rotating shaft is fixedly connected to the bottom end of the combination shaft, a second helical blade is wound around the shaft surface of the second rotating shaft, and a brush is provided on the lower surface of the second helical blade.

[0017] A linkage shaft is fixedly connected to the axial surface of the second rotating shaft, and an inner ring is fixedly connected to the other end of the linkage shaft. An adapter sleeve is rotatably connected to the outer ring surface of the inner ring, and multiple brackets are fixedly connected to the outer ring surface of the adapter sleeve. The adapter sleeve is fixedly connected to the inner sidewall of the loop frame through the multiple brackets.

[0018] Preferably, the first helical blade has a first micropore and the second helical blade has a second micropore.

[0019] Preferably, two through holes are provided at the top of the inner side of the groove, and an L-shaped plate is slidably connected in each of the two through holes. The L-shaped plate has a matching interface corresponding to the gear shaft, and a vibrator is installed on the top of each L-shaped plate.

[0020] Preferably, a pulse valve is installed on the blower pipe.

[0021] Preferably, the inner wall of the filter box is embedded with a partition plate, and U-shaped tubes are snapped onto the upper and lower sides of the partition plate on the front of the filter box. A guide plate is provided on the inner wall of the filter box below the partition plate. A tail pipe is connected to the back of the filter box, and a drain pipe is connected to the bottom of the filter box.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. In this invention, by guiding the airflow from top to bottom and using a U-shaped tube deflection design, the exhaust gas forms a clear and continuous flow path within the filter box, ensuring a tight connection between the primary filtration and the secondary water vortex filtration. This effectively eliminates dead zones in the airflow, improves the overall filtration efficiency, and the secondary water vortex filtration method significantly enhances the gas-liquid turbulent contact. It can not only efficiently capture fine dust but also simultaneously remove soluble harmful components, thereby greatly improving the purification depth and emission safety.

[0024] 2. In this invention, the strip nozzle blows air from bottom to top and moves horizontally in sync with the dust collection hood, so that the high-pressure airflow evenly covers the entire flat filter plate area, ensuring no dead corners in dust removal, effectively reducing filtration resistance, and extending the service life of the filter plate. At the same time, the back-blowing airflow and the negative pressure of the dust collection hood work together to immediately suck away and discharge the detached dust from the system, effectively solving the problem that conventional back-blowing can easily lead to secondary dust settling and pollution in the box. When the dust collection hood stops due to size interference and contact with the box wall, the strip nozzle can still move independently to the limit edge of the filter plate, completely eliminating blind spots in dust removal and ensuring thorough cleaning of the entire width.

[0025] 3. In this invention, the component uses an alternating switching mechanism to convert the reciprocating motion of the dust hood into a unidirectional continuous rotation of the gear shaft, providing a stable and reliable power source for the subsequent spiral blades and brushes. The first spiral blades guide the dust-laden airflow, enhancing the collision and separation effect between the dust and the inner wall of the sleeve, while effectively preventing dust from accumulating and clogging inside the sleeve, ensuring smooth airflow. The micropores densely distributed on the surface of the first and second spiral blades generate local flow during rotation by means of the pressure difference on both sides of the blades, forming a dynamic adhering air film, blocking the contact between dust and the substrate, and peeling and blowing off the already attached dust, achieving self-cleaning of the blades, significantly reducing dust adhesion and accumulation, extending the continuous operation cycle, and greatly reducing the frequency of manual maintenance.

[0026] 4. In this invention, the second spiral blades drive the brush to continuously sweep the top of the filter plate, forming a uniform brushing surface, effectively removing the dust layer deposited on the filter plate surface, and achieving secondary purification. At the same time, the vibrator excites the U-shaped frame to drive multiple second spiral blades and brushes to rise and fall at the same frequency, so that the brushes and filter plates periodically contact and separate, and the vibration energy is introduced into the interior of the filter plate, effectively destroying the adhesion between the dust and the filter plate, assisting in the peeling of surface and internal dust trapping, and significantly improving the depth and thoroughness of backflushing cleaning. The elastic floating support provided by the third spring allows for flexible displacement between the brush and the filter plate, avoiding rigid squeezing and scraping, protecting the integrity of the filter plate surface coating and the service life of the brushes.

[0027] 5. In this invention, at the instant the brush detaches from the filter plate surface, the pulse valve opens and supplies instantaneous high-pressure pulse airflow to the strip nozzle, allowing the high-pressure energy to directly impact the filter plate without the physical obstruction of the brush. This avoids airflow attenuation and ensures effective removal of deep dust inside the filter plate. Through timing control, the pulse backflushing and brush contact actions alternate and complement each other. The brush is responsible for loosening the dust accumulated on the surface and inside, while the pulse airflow completely blows away the dust after it detaches. The two actions are staggered in time and superimposed in effect, which not only eliminates the obstruction of the airflow by the brush but also fully utilizes the pulse impact force, thereby optimizing the overall dust removal efficiency. Attached Figure Description

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a structural schematic diagram of the filter box from another perspective in this invention;

[0031] Figure 3 This is a frontal cross-sectional structural diagram of the present invention;

[0032] Figure 4 This is a cross-sectional structural schematic diagram from another perspective of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the strip nozzle and the dust collection hood in this invention;

[0034] Figure 6 This is the present invention. Figure 5 A structural diagram from another perspective;

[0035] Figure 7 This is a schematic diagram of the structure of the first ratchet assembly of the present invention;

[0036] Figure 8 This is a schematic diagram of the structure of the dust hood in this invention;

[0037] Figure 9 In this invention Figure 8 A cross-sectional structural diagram;

[0038] Figure 10 This is the present invention. Figure 8 A schematic diagram of the disassembled structure;

[0039] Figure 11 This is the present invention. Figure 10 A schematic diagram of the three-dimensional structure viewed from below;

[0040] Figure 12 This is the present invention. Figure 5 Enlarged structural diagram at point A;

[0041] Figure 13 This is the present invention. Figure 9 Enlarged structural diagram at point B;

[0042] Figure 14 This is the present invention. Figure 11 Schematic diagram of the structure of the combined channel;

[0043] Figure 15 This is the present invention. Figure 11 A schematic diagram of the structure of the second helical blade.

[0044] In the diagram: 1. Filter box; 2. Flat filter plate; 3. Strip nozzle; 4. First transverse seat; 5. First threaded cylinder; 6. First threaded rod; 7. First slide rod; 8. Dust suction hood; 9. Second transverse seat; 10. Second threaded cylinder; 11. First sliding sleeve; 12. Second threaded rod; 13. Second sliding sleeve; 14. Second slide rod; 15. First gear; 16. Second gear; 17. Gear chain; 18. Motor; 19. Divider plate; 20. Guide plate; 21. Sewage pipe; 22. U-shaped pipe; 23. Tailpipe; 24. Air collection device; 25. Blower pipe; 26. Blower; 27. Dust collection pipe; 28. Combination port; 29. ​​Slide groove; 30. Slide seat; 31. First spring; 32. Frame; 33. Sleeve; 34. Adapter frame; 35. First rotating shaft; 36. 37. First bevel gear; 38. Second bevel gear; 39. Gear shaft; 40. First ratchet assembly; 401. Third gear; 402. Countersunk groove; 403. Internal tooth surface; 404. Rattle tooth; 405. Adapter shaft; 406. Second spring; 41. Second ratchet assembly; 42. First micro-hole; 43. Second micro-hole; 44. Combined groove; 45. Keyway; 46. U-shaped groove; 47. Through hole; 48. Combined shaft; 49. Spline; 50. Second rotating shaft; 51. Second helical blade; 52. Brush; 53. Linkage shaft; 54. Adapter sleeve; 55. Bracket; 56. U-shaped frame; 57. L-shaped plate; 58. Connecting interface; 59. Third spring; 60. Vibrator; 61. Pulse valve; 62. Tooth plate; 63. Inner ring; 64. Strip groove. Detailed Implementation

[0045] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0046] like Figures 1 to 15 As shown, a harmless treatment device for waste gas from epoxy powder coating production includes a filter box 1, a flat filter plate 2 embedded in the filter box 1, a gas collection device 24 disposed on the top of the filter box 1 corresponding to the flat filter plate 2; a first transverse seat 4 disposed below the flat filter plate 2, a strip nozzle 3 clamped on the first transverse seat 4, the top of the strip nozzle 3 being slidably connected to the bottom of the flat filter plate 2, a blower pipe 25 clamped on the side wall of the filter box 1 corresponding to the strip nozzle 3, one end of the blower pipe 25 being connected to the bottom of the strip nozzle 3, a blower 26 disposed on one side of the filter box 1, and the other end of the blower pipe 25 being connected to the output end of the blower 26;

[0047] A second transverse shift seat 9 is provided above the flat filter plate 2. A combination port 28 is opened at the top of the second transverse shift seat 9. A dust collection hood 8 is embedded in the combination port 28. A dust collection pipe 27 is snapped onto the top of the filter box 1 corresponding to the dust collection hood 8. The end of the dust collection pipe 27 is connected to the top of the dust collection hood 8. A driving device is provided between the first transverse shift seat 4 and the second transverse shift seat 9 to drive the dust collection hood 8 and the strip nozzle 3 to move horizontally back and forth synchronously at the top and bottom of the flat filter plate 2, respectively.

[0048] The driving device includes a first threaded cylinder 5 and a first sliding sleeve 11 that are snapped onto the side of the first transverse sliding seat 4. A first threaded rod 6 is threadedly fitted inside the first threaded cylinder 5. The end of the first threaded rod 6 is rotatably connected to the wall of the filter box 1. A first sliding rod 7 is slidably inserted inside the first sliding sleeve 11. The end of the first sliding rod 7 is snapped onto the wall of the filter box 1.

[0049] The second threaded cylinder 10 and the second sliding sleeve 13 are respectively engaged on the side of the second transverse sliding seat 9. The second threaded cylinder 10 is threaded with a second threaded rod 12. The end of the second threaded rod 12 is rotatably connected to the wall of the filter box 1. The second sliding sleeve 13 is slidably provided with a second sliding rod 14. The end of the second sliding rod 14 is engaged with the wall of the filter box 1.

[0050] The ends of the first threaded rod 6 and the second threaded rod 12 are both fixedly sleeved with the first gear 15. The front of the filter box 1 is equipped with a motor 18. The output shaft of the motor 18 is fixedly sleeved with the second gear 16. The second gear 16 is connected to the two first gears 15 through a toothed chain 17.

[0051] A partition plate 19 is embedded in the inner wall of the filter box 1. U-shaped tubes 22 are snapped on the upper and lower sides of the front of the filter box 1 corresponding to the partition plate 19. A guide plate 20 is provided on the inner wall of the filter box 1 below the partition plate 19. A tail pipe 23 is connected to the back of the filter box 1. A sewage pipe 21 is connected to the bottom of the filter box 1.

[0052] Specifically, this implementation method involves the following: The system uses a gas collection device 24 to centrally collect dust-laden exhaust gases generated at multiple workstations during the epoxy powder coating production process. The collected exhaust gases are pressurized and then introduced into a filter box 1. In the filter box 1, the exhaust gases flow downwards, first passing through a flat filter plate 2 to achieve initial filtration of larger dust particles. After initial filtration, the exhaust gases flow through a U-shaped pipe 22 to the area below the partition plate 19. Under the action of the guide plate 20, the airflow is tangentially introduced into the liquid surface at high speed, forming a violently rotating water vortex in the liquid at the bottom of the filter box 1. This allows for secondary filtration of residual fine dust and some soluble pollutants through full gas-liquid contact. The clean gas, after meeting the treatment standards, finally exits through the tailpipe 2. 3. Discharge System: As the filtration cycle increases, a large amount of dust will be trapped on the upper surface and inside of the flat filter plate 2, causing the filtration resistance to rise. At this time, the system starts the back-flushing regeneration process of the filter plate. This process is controlled by the control system to command the motor 18 and the blower 26 to operate in coordination. During the back-flushing process, the pressurized air output by the blower 26 is injected into the strip nozzle 3 through the blower pipe 25. After the high-pressure air is ejected from the strip nozzle 3, it flows rapidly from bottom to top along the bottom of the flat filter plate 2, forming a reverse blowing on the flat filter plate 2, effectively removing the dust trapped on the surface and inside of the flat filter plate 2. At the same time, the dust collection hood 8 located at a certain distance above the flat filter plate 2 generates negative pressure through the dust collection equipment connected to the dust collection pipe 27. The back-flushing airflow from bottom to top carries away the dust that has been removed. The dust enters the dust collection hood 8 and is discharged from the system by the dust collection equipment through the dust collection pipe 27, realizing the collection and separation of dust. In terms of the synchronous lateral movement drive of the dust collection hood 8 and the strip nozzle 3, after the motor 18 starts, its output end drives the second gear 16 to rotate. The second gear 16 drives the two first gears 15 to rotate synchronously through the gear chain 17. The two first gears 15 drive the first threaded rod 6 and the second threaded rod 12 to rotate in their respective first threaded cylinders 5 and second threaded cylinders 10, thereby converting the rotational motion into linear motion, driving the first lateral moving seat 4 and the second lateral moving seat 9 to move laterally synchronously. During this movement, the first lateral moving seat 4 slides on the first sliding rod 7 by relying on the first sliding sleeve 11 on it, and the second lateral moving seat 9 slides on the first sliding rod 7 by relying on the first sliding sleeve 11 on it. The second sliding sleeve 13 slides on the second sliding rod 14, ensuring the stability of the lateral guidance. Through the above linkage, the top of the strip nozzle 3 maintains sliding contact with the bottom of the flat filter plate 2 throughout the entire movement. The dust suction hood 8 moves synchronously at a certain distance above the flat filter plate 2, performing efficient and uniform backflushing regeneration on the entire filter plate. Through the top-down airflow guidance and the U-shaped tube 22 deflection design, the exhaust gas forms an orderly flow path in the box, ensuring a tight connection between primary and secondary filtration, preventing the formation of airflow dead zones, and improving filtration efficiency. The two-stage water vortex filtration method enhances the gas-liquid turbulent contact, effectively removing fine dust and soluble harmful components. The backflushing regeneration system promptly restores the air permeability of the filter plate, ensuring long-term stable operation of the system.The strip-shaped nozzles 3 perform backflushing from bottom to top and move horizontally synchronously with the dust collection hood 8, allowing the high-pressure airflow to evenly cover the entire area of ​​the flat filter plate 2, ensuring thorough dust removal without dead corners, effectively reducing filtration resistance, and extending the filter plate's service life. The backflushing airflow works in conjunction with the negative pressure of the upper dust collection hood 8, ensuring that the stripped dust is immediately sucked away and discharged from the system, solving the problem of secondary dust settling and contamination within the housing that is easily caused by conventional backflushing.

[0053] Specifically, the front and rear side walls of the combination port 28 are provided with sliding grooves 29. The two sliding grooves 29 and the combination port 28 are slidably fitted with a slide seat 30. The dust cover 8 is fixedly connected to the inner side of the slide seat 30. Each sliding groove 29 is embedded with a first spring 31. The slide seat 30 is elastically supported by the inner walls of the two sliding grooves 29 through multiple first springs 31.

[0054] Specifically, during the lateral movement, the second lateral moving seat 9 drives the dust collection hood 8 to move laterally. Since the outer diameter of the dust collection hood 8 is larger than the effective working width of the strip nozzle 3, when the edge of the dust collection hood 8 contacts the inner wall of the filter box 1, the strip nozzle 3 has not yet been able to cover and complete the backwash cleaning of the full width of the flat filter plate 2 in this direction of travel. At this time, the control system commands the motor 18 to continue running, driving the strip nozzle 3 to continue moving forward in the original direction of travel to complete the cleaning of the remaining area of ​​the filter plate. At the same time, the second lateral moving seat 9 generates relative sliding displacement on the fixed slide seat 30 through its own two sliding grooves 29 and combination port 28. During this relative sliding process, the second lateral moving seat 9 compresses the first spring 31 on the slide seat 30, forcing The first spring 31 undergoes elastic deformation and stores potential energy. This design allows the dust hood 8 to remain stationary after contacting the inner wall of the housing. Meanwhile, the strip nozzle 3 achieves independent and continuous displacement through the relative movement between the second transverse seat 9 and the slide 30, ensuring the complete execution of the backflushing action. By allowing the strip nozzle 3 to continue moving independently after the dust hood 8 is limited, it ensures that the strip nozzle 3 can move to the extreme edge position of the flat filter plate 2, achieving thorough cleaning of the entire width of the filter plate. This effectively avoids blind spots in dust removal caused by the size limitation of the dust hood 8. By utilizing the cooperation of the slide groove 29, the combination port 28, and the slide 30, the limiting action of the dust hood 8 and the moving action of the strip nozzle 3 are decoupled. When the dust hood 8 is forced to stop due to size interference, the strip nozzle 3 can still continue to move.

[0055] Specifically, a frame 32 is snapped into the inner wall of the dust hood 8, and multiple sleeves 33 are snapped into the bottom of the frame 32. An adapter 34 is snapped into the port at the top of each sleeve 33, and a first rotating shaft 35 is rotatably connected to each adapter 34. A first spiral blade 36 is wound around the first rotating shaft 35.

[0056] A first bevel gear 37 is fixedly sleeved at the top of the first rotating shaft 35. The tooth surfaces of each first bevel gear 37 are meshed with second bevel gears 38. A gear shaft 39 is fixedly connected to the inner side of multiple second bevel gears 38. A first ratchet assembly 40 and a second ratchet assembly 41 are respectively provided at both ends of the gear shaft 39. The two ends of the gear shaft 39 are rotatably connected to the front and back of the dust collection hood 8, respectively. The first ratchet assembly 40 and the second ratchet assembly 41 have the same structure. The rear wall and the front wall of the filter box 1 are both provided with strip grooves 64. The bottom of the inner side of one strip groove 64 and the top of the inner side of the other strip groove 64 are fixedly connected with toothed plates 62. The two toothed plates 62 are respectively meshed with the first ratchet assembly 40 and the second ratchet assembly 41.

[0057] The first ratchet assembly 40 includes a third gear 401 fixedly sleeved on the end of the gear shaft 39. The third gear 401 meshes with the gear plate 62. A groove 402 is provided on the side of the third gear 401 near the dust hood 8. An inner tooth surface 403 is provided on the inner side wall of the groove 402. A ratchet 404 meshes on the inner tooth surface 403. The other end of the ratchet 404 is rotatably connected to a connecting shaft 405. The other end of the connecting shaft 405 is fixedly connected to the gear shaft 39. A second spring 406 is sleeved on the connecting shaft 405. The ratchet 404 and the connecting shaft 405 form an elastic rotational engagement through the second spring 406.

[0058] Specifically, in this embodiment, during the process of the second transverse sliding seat 9 driving the dust collection hood 8 to reciprocate laterally, the dust collection hood 8, through its gear shaft 39, drives the first ratchet assembly 40 and the second ratchet assembly 41 to move on their respective corresponding toothed surfaces of the toothed plates 62, thereby converting the linear reciprocating motion of the dust collection hood 8 into the unidirectional rotational motion of the gear shaft 39. The specific operating logic is as follows: when the dust collection hood 8 moves towards the motor 18, the third gear 401 in the first ratchet assembly 40 meshes with the corresponding toothed plate 62 and rotates. At this time, the ratchet 404 in the first ratchet assembly 40 is affected by the direction of the force. Locked, unable to rotate around the adapter shaft 405, allowing the rotational power of the third gear 401 to be fully transmitted to the gear shaft 39, driving it to rotate. Simultaneously, the third gear 401 in the second ratchet assembly 41 moves and rotates on another toothed plate 62, but its internal ratchet 404 is subjected to a thrust, rotating around the adapter shaft 405 and twisting the second spring 406 to cause elastic deformation. During this process, the power transmission path of the second ratchet assembly 41 is cut off, and the third gear 401 is in an idle state. Therefore, in this direction of movement, the first ratchet assembly 40 is responsible for driving the gear shaft 39. When the second transverse slide seat 9 drives the dust cover 8 to move in the opposite direction away from the motor 18, the states of the first ratchet assembly 40 and the second ratchet assembly 41 are interchanged. The ratchet 404 in the second ratchet assembly 41 is locked and undertakes the task of driving the gear shaft 39 to rotate, while the ratchet 404 in the first ratchet assembly 40 is unlocked and idles. Through this alternating switching mechanism, no matter whether the dust cover 8 moves to the left or right, the gear shaft 39 always maintains continuous rotation in a single direction. During the unidirectional rotation, the gear shaft 39 drives multiple second bevel gears 38 on it to drive multiple gears perpendicular to it. The first bevel gear 37 engages directly, thereby driving multiple first rotating shafts 35 to rotate synchronously. During the continuous rotation of each first rotating shaft 35, the first spiral blades 36 mounted on it rotate stably. When the high-pressure airflow carrying dust enters the sleeve 33 where the first spiral blades 36 are located, the continuously rotating spiral blades generate a spiral guiding effect on the airflow and the dust it carries, causing the dust-laden airflow to move along a spiral trajectory within the sleeve 33. This enhances the collision and separation effect between the dust and the inner wall of the sleeve 33, while simultaneously preventing dust from depositing or clogging inside the sleeve 33, thus ensuring the smooth transport of the dust-laden airflow.

[0059] Specifically, the bottom of the dust cover 8 is provided with a U-shaped groove 46, and a U-shaped frame 56 is embedded in the U-shaped groove 46. Multiple third springs 59 are fixedly connected to the top of the U-shaped frame 56, and the U-shaped frame 56 forms an elastic support with the top of the inner side of the U-shaped groove 46 through the multiple third springs 59.

[0060] Each first rotating shaft 35 has a combination groove 44 at its bottom end. The inner wall of the combination groove 44 has a keyway 45. A combination shaft 48 is inserted into the combination groove 44. A spline 49 is provided on the shaft surface of the combination shaft 48. The combination shaft 48 slides with the keyway 45 through the spline 49. A second rotating shaft 50 is fixedly connected to the bottom end of the combination shaft 48. A second helical blade 51 is wound on the shaft surface of the second rotating shaft 50. A brush 52 is provided on the lower surface of the second helical blade 51.

[0061] A linkage shaft 53 is fixedly connected to the shaft surface of the second rotating shaft 50. An inner ring 63 is fixedly connected to the other end of the linkage shaft 53. An adapter sleeve 54 is rotatably connected to the outer ring surface of the inner ring 63. Multiple brackets 55 are fixedly connected to the outer ring surface of the adapter sleeve 54. The adapter sleeve 54 is fixedly connected to the inner side wall of the loop frame 56 through the multiple brackets 55.

[0062] Specifically, in this embodiment, the first rotating shaft 35, during continuous rotation, forms an axially slidable connection with the spline 49 at the end of the second rotating shaft 50 through the keyway 45 at its end, thereby efficiently transmitting rotational torque to the second rotating shaft 50. After receiving torque, the second rotating shaft 50 drives the second spiral blade 51, which is fixedly mounted on its surface, to rotate stably around the axis. During the rotation of the second spiral blade 51, the brush 52 on its lower surface rotates with the second spiral blade 51, and its bristles continuously contact and sweep the top surface of the flat filter plate 2. By utilizing the relative movement between the brush 52 and the surface of the filter plate, the dust particles trapped on the plate surface are brushed and peeled off, thereby achieving secondary cleaning and surface purification of the residual dust on the top of the flat filter plate 2. When the second spiral blade 51 rotates, the brush 52 on its lower surface continuously and reciprocally sweeps along the top of the filter plate, forming a uniform brushing surface that is consistent with the plane direction of the flat filter plate 2, which can effectively remove the dust layer deposited and attached to the surface of the filter plate and improve the thoroughness of dust removal.

[0063] Specifically, the first helical blade 36 has a first micropore 42, and the second helical blade 51 has a second micropore 43.

[0064] Specifically, in this embodiment, first micropores 42 and second micropores 43 are densely distributed on the surfaces of the first helical blade 36 and the second helical blade 51, respectively. The first micropores 42 are arranged in a uniform or non-uniform pattern along the helical trajectory of the first helical blade 36 and penetrate the body of the first helical blade 36, forming a micro gas channel connecting both sides of the first helical blade 36. When the first helical blade 36 and the second helical blade 51 are in a continuously rotating working state, the airflow carrying dust moves along the helical path. During this process, some of the gas in the airflow, under the action of the pressure difference between the two sides of the first helical blade 36 and the second helical blade 51, is discharged through the first micropores 42 and the second micropores 43. Localized through-flow occurs, meaning that the high-pressure airflow permeates from one side of the blade to the other. This high-pressure airflow, flowing out through micropores, forms a dynamic, wall-attached air film on the blade surface. This air film effectively blocks direct contact between dust particles and the blade substrate, while simultaneously peeling and blowing away dust already attached to the blade surface, thus achieving a self-cleaning function for the blade surface. Through this mechanism, the adhesion and accumulation of fine dust on the blade surface can be significantly reduced, allowing the first helical blade 36 and the second helical blade 51 to maintain a low dust adhesion rate in a dusty gas environment for a long time, effectively extending their continuous operating cycle and significantly reducing the frequency of manual maintenance and cleaning required due to dust blockage or scaling.

[0065] Specifically, two through holes 47 are opened on the top of the inner side of the groove 46, and an L-shaped plate 57 is slidably connected in both through holes 47. The L-shaped plate 57 is provided with a matching interface 58 corresponding to the gear shaft 39, and a vibrator 60 is installed on the top of each L-shaped plate 57.

[0066] Specifically, in this embodiment, the U-shaped frame 56 is installed within the U-shaped groove 46 and can slide freely within a certain range of stroke along the vertical direction of the U-shaped groove 46. The top of the U-shaped frame 56 is elastically supported by multiple third springs 59, ensuring a stable suspended state under normal conditions. When the control system starts the vibrator 60, the mechanical vibration generated by the vibrator 60 is transmitted to the U-shaped frame 56 through the L-shaped plate 57 as the force transmission medium. Under the action of the periodic excitation force, the U-shaped frame 56 forms a stable reciprocating lifting motion within the U-shaped groove 46. This lifting motion is transmitted through the structure, synchronously driving multiple second spiral blades 51 installed on the U-shaped frame 56 to reciprocate in the vertical direction with the same frequency and amplitude. The lifting motion of the second spiral blades 51 directly changes the gap distance between the brush 52 installed on it and the surface of the flat filter plate 2, causing the brush 52 and the filter plate to form periodic contact and separation. At the same time, the excitation force of the vibrator 60 is transmitted through the L-shaped plate 57. The transmission path of the U-shaped frame 56 and the second spiral blade 51 ultimately acts on the flat filter plate 2 body via the brush 52, so that the vibration energy is effectively introduced into the interior of the filter plate. Through the excitation of the vibrator 60 and the elastic support of the U-shaped frame 56, the brush 52 and the flat filter plate 2 form periodic contact. With the physical brushing action of the brush 52 and the vibration energy introduced into the interior of the filter plate, the adhesion between the dust and the filter plate can be effectively broken, which helps to peel off the dust trapped on the surface and inside of the filter plate and improve the overall back-blowing cleaning effect. The third spring 59 provides elastic floating support, so that the U-shaped frame 56 and the second spiral blade 51 have a flexible displacement margin, avoiding rigid compression or scraping between the brush 52 and the surface of the filter plate, effectively protecting the integrity of the coating on the surface of the filter plate and the service life of the brush 52. The vibration generated by the vibrator 60, through the transmission of the L-shaped plate 57 and the U-shaped frame 56, can synchronously drive multiple second spiral blades 51 and brushes 52 to perform consistent lifting and lowering movements.

[0067] Specifically, a pulse valve 61 is installed on the blower pipe 25.

[0068] Specifically, in the backflushing cleaning process, the blower 26 starts running, and the control system commands the pulse valve 61 to enter the working state. After the pulse valve 61 is activated, it periodically cuts and modulates the continuous compressed airflow output by the blower 26, converting it into an intermittent, high-pressure pulse airflow, which is supplied to the strip nozzle 3 through the blower pipe 25. The timing of the pulse airflow injection is coordinated with the lifting and lowering movement of the brush 52. The specific control logic is as follows: when the U-shaped frame 56 drives the second spiral blade 51 and the brush 52 to rise, causing the brush 52 to detach from the surface of the flat filter plate 2, the pulse valve 61 is activated and opened, blowing an instantaneous high-pressure pulse airflow into the strip nozzle 3. After being ejected from the strip nozzle 3, the pulse airflow penetrates the flat filter plate 2 from bottom to top. Without the physical obstruction of the brush 52, it reverses the flow of air through the filter plate with a large instantaneous impact force. During the backflushing process, when the brush 52 descends and contacts the flat filter plate 2, the pulse valve 61 closes or pauses operation, and the pulse airflow stops supplying. This cycle repeats, achieving alternating and staggered operation of pulse backflushing and contact with the brush 52. At the moment the brush 52 detaches from the filter plate, the pulse airflow is blown in, allowing the high-pressure airflow to directly impact the surface of the filter plate without the obstruction of the brush 52. This avoids the attenuation of airflow energy due to the obstruction of the brush 52, ensuring that the impact force of the pulse backflushing can be fully utilized, effectively stripping away the deep dust trapped inside the flat filter plate 2. Through timing control, the pulse backflushing and contact with the brush 52 are alternated, staggered in time and complementary in function. The brush 52 is responsible for loosening the dust accumulated on the surface and inside, while the pulse airflow completely blows away the dust after it detaches, avoiding the obstruction of the airflow channel by the brush 52 and improving the overall synergy of the dust removal effect.

[0069] During operation, this system uses gas collection equipment 24 to centrally collect dust-laden exhaust gas generated at multiple workstations during epoxy powder coating production. The collected exhaust gas is pressurized and then introduced into filter box 1, where it flows from top to bottom. The airflow first passes through the flat filter plate 2 to complete the initial filtration of larger dust particles. Subsequently, the exhaust gas is turned through U-shaped pipe 22 and enters the area below partition plate 19. Under the action of guide plate 20, it is introduced into the liquid surface at high speed, forming a violently rotating water vortex in the liquid at the bottom of the box. Through full contact between gas and liquid, secondary filtration of residual fine dust and soluble pollutants is achieved. The treated clean gas is finally discharged from tail pipe 23.

[0070] As the filtration cycle lengthens, more dust is trapped on the upper surface and inside of the flat filter plate 2, and the filtration resistance increases. At this time, the system starts the back-blowing regeneration process. This process is executed by the control system commanding the motor 18 and the blower 26 in coordination: the pressurized air output by the blower 26 is injected into the strip nozzle 3 through the blower pipe 25. The high-pressure air passes through the flat filter plate 2 from bottom to top, forming a reverse blowing, which effectively removes the dust trapped on the surface and inside. At the same time, the dust collection hood 8 located at a certain distance above the filter plate generates negative pressure through the dust collection equipment connected to the dust collection pipe 27, which immediately sucks in the dust removed by the back-blowing and discharges it from the system, realizing the collection and separation of dust.

[0071] Regarding the synchronous lateral movement drive of the dust hood 8 and the strip nozzle 3, after the motor 18 starts, its output end drives the second gear 16 to rotate. The second gear 16 drives the two first gears 15 to rotate synchronously through the tooth chain 17, which respectively drives the first threaded rod 6 and the second threaded rod 12 to rotate in the corresponding first threaded cylinder 5 and second threaded cylinder 10, converting the rotational motion into linear motion, driving the first lateral moving seat 4 and the second lateral moving seat 9 to move laterally synchronously. During the movement, the first lateral moving seat 4 slides on the first sliding rod 7 through the first sliding sleeve 11, and the second lateral moving seat 9 slides on the second sliding rod 14 through the second sliding sleeve 13, together ensuring the stability of the lateral movement guide. Through the above linkage, the top of the strip nozzle 3 always maintains sliding contact with the bottom of the flat filter plate 2 throughout the entire movement, while the dust hood 8 moves synchronously at a certain distance above the filter plate, realizing uniform back-blowing of the entire filter plate.

[0072] To ensure thorough cleaning, when the second transverse seat 9 moves the dust hood 8 laterally until its edge contacts the inner wall of the filter box 1, the strip nozzle 3 has not yet covered the full width of the filter plate in this direction of travel. At this time, the control system commands the motor 18 to continue running, driving the strip nozzle 3 to continue moving in the original direction to complete the cleaning of the remaining area. Meanwhile, the second transverse seat 9 slides relative to the fixed slide 30 through its two sliding grooves 29 and combination port 28, and squeezes the first spring 31 on the slide 30, causing it to deform elastically and store potential energy. This design keeps the dust hood 8 stationary after contacting the inner wall of the box, while the strip nozzle 3 achieves independent and continuous displacement through relative movement, ensuring that the back-blowing action is fully executed to the limit edge of the filter plate and completely eliminating the dust cleaning blind spot.

[0073] During the reciprocating lateral movement of the dust hood 8 driven by the second transverse seat 9, the dust hood 8 drives the first ratchet assembly 40 and the second ratchet assembly 41 to move on the corresponding tooth surfaces of the toothed plate 62 via the gear shaft 39, converting the linear reciprocating motion into the unidirectional rotational motion of the gear shaft 39. Specifically, when the dust hood 8 moves towards the motor 18, the third gear 401 in the first ratchet assembly 40 meshes with the toothed plate 62 and rotates, while the internal ratchet 404 is locked and cannot rotate around the adapter shaft 405, thus completing the power transfer. The power is transmitted to the gear shaft 39 to drive its rotation. Although the third gear 401 in the second ratchet assembly 41 rotates, the ratchet 404 inside it is pushed and rotates around the adapter shaft 405 and twists the second spring 406 to produce deformation. The power transmission path is cut off and it is in an idle state. When moving in the opposite direction, the two states are interchanged. The second ratchet assembly 41 undertakes the driving task, and the first ratchet assembly 40 idles. Through this alternation, the gear shaft 39 always rotates continuously in a single direction, regardless of the direction of movement of the dust cover 8.

[0074] When the gear shaft 39 rotates, it drives multiple vertically meshing first bevel gears 37 through multiple second bevel gears 38, which in turn drive multiple first rotating shafts 35 to rotate synchronously. The first rotating shafts 35 drive the first spiral blades 36 mounted on them to rotate stably. When the high-pressure dust-laden airflow enters the sleeve 33 where the first spiral blades 36 are located, the spiral guiding effect causes the airflow to move along the spiral trajectory, which enhances the collision and separation effect between the dust and the inner wall of the sleeve 33, and prevents dust from accumulating and clogging, ensuring smooth conveying.

[0075] The end of the first rotating shaft 35 is connected to the end of the second rotating shaft 50 via a keyway 45 and a spline 49, forming an axially slidable fit. Torque is transmitted to the second rotating shaft 50, which drives the second spiral blade 51 on its surface to rotate. The brush 52 on the lower surface of the blade continuously contacts and sweeps the top of the flat filter plate 2 as it rotates. The relative motion is used to peel off the dust trapped on the plate surface, achieving secondary cleaning and surface purification of the residue on the top. The brush 52 forms a uniform brushing surface along the filter plate, effectively removing the deposited layer.

[0076] The first spiral blade 36 and the second spiral blade 51 are respectively densely distributed with first micropores 42 and second micropores 43, which are arranged regularly along the spiral trajectory and penetrate the blade body to form a micro gas channel. When the blade rotates continuously, the airflow moves along the spiral path. Some of the gas is driven by the pressure difference on both sides of the blade to generate local flow through the micropores, forming a dynamic attached gas film on the blade surface. This gas film blocks the dust from direct contact with the blade substrate, and at the same time, it peels off and blows away the already attached dust, realizing the self-cleaning of the blade, significantly reducing the adhesion and accumulation of fine dust, extending the continuous operation cycle, and reducing the frequency of manual maintenance.

[0077] The U-shaped frame 56 is installed in the U-shaped groove 46 and can slide freely in the vertical direction within a certain stroke. Its top is elastically supported by multiple third springs 59 to maintain a stable suspension. After the control system starts the vibrator 60, the vibration is transmitted to the U-shaped frame 56 through the L-shaped plate 57. Under the action of periodic excitation force, the U-shaped frame 56 forms a stable reciprocating lifting motion in the U-shaped groove 46, which synchronously drives multiple second spiral blades 51 to vertically displace in the same frequency and amplitude. This lifting motion changes the gap between the brush 52 and the filter plate surface, forming periodic contact and separation. At the same time, the vibration energy is transmitted through the transmission path and finally introduced into the interior of the filter plate through the brush 52, effectively destroying the dust adhesion force, assisting in peeling off the surface and internal dust trapping, and improving the overall back-blowing dust removal effect. The flexible floating support provided by the third spring 59 gives the U-shaped frame 56 and the second spiral blades 51 displacement margin, avoiding rigid extrusion and scraping, and protecting the filter plate coating and the life of the brush 52.

[0078] During the backflushing cleaning process, while the blower 26 is running, the control system commands the pulse valve 61 to enter the working state. The pulse valve 61 periodically cuts and modulates the continuous compressed airflow, converting it into an intermittent high-pressure pulse airflow, which is supplied to the strip nozzle 3 through the blower pipe 25. The timing of the pulse injection is coordinated with the lifting and lowering movement of the brush 52: when the U-shaped frame 56 drives the second spiral blade 51 and the brush 52 to rise and detach from the filter plate surface, the pulse valve 61 opens, and the instantaneous high-pressure pulse penetrates the filter plate from bottom to top. Without the brush 52 blocking the flow, it blows back with a large impact force. When the brush 52 descends and contacts the filter plate, the pulse valve 61 closes or pauses, and the pulse stops. This cycle is repeated to achieve the alternating staggered operation of pulse backflushing and brush 52 contact.

[0079] The moment the brush 52 detaches, a pulsed airflow is blown in, allowing the high-pressure energy to directly impact the filter plate surface without obstruction. This avoids attenuation due to the brush 52 blocking the flow, ensuring effective removal of deep dust. Through timing control, the pulse backflushing and the brush 52's actions complement each other and are staggered in time. The brush 52 loosens the accumulated dust, and the pulsed airflow blows the dust away completely after it detaches. The synergy of the two significantly improves the overall dust removal efficiency.

[0080] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A device for harmless treatment of waste gas from epoxy powder coating production, comprising a filter box (1), wherein a flat filter plate (2) is embedded in the filter box (1), and a gas collection device (24) is provided on the top of the filter box (1) corresponding to the flat filter plate (2); characterized in that: A first transverse seat (4) is provided below the flat filter plate (2), and a strip nozzle (3) is snapped onto the first transverse seat (4). The top of the strip nozzle (3) is slidably connected to the bottom of the flat filter plate (2). A blower pipe (25) is snapped onto the side wall of the filter box (1) corresponding to the strip nozzle (3). One end of the blower pipe (25) is connected to the bottom of the strip nozzle (3). A blower (26) is provided on one side of the filter box (1), and the other end of the blower pipe (25) is connected to the output end of the blower (26). A second transverse seat (9) is provided above the flat filter plate (2). A combination port (28) is provided at the top of the second transverse seat (9). A dust collection hood (8) is embedded in the combination port (28). A dust collection pipe (27) is snapped onto the top of the filter box (1) corresponding to the dust collection hood (8). The end of the dust collection pipe (27) is connected to the top of the dust collection hood (8). A driving device is provided between the first transverse seat (4) and the second transverse seat (9) for driving the dust collection hood (8) and the strip nozzle (3) to move horizontally back and forth synchronously at the top and bottom of the flat filter plate (2).

2. The device for harmless treatment of waste gas from epoxy powder coating production according to claim 1, characterized in that: The driving device includes a first threaded cylinder (5) and a first sliding sleeve (11) that are snapped onto the side of the first transverse seat (4). The first threaded cylinder (5) is threaded with a first threaded rod (6). The end of the first threaded rod (6) is rotatably connected to the wall of the filter box (1). A first sliding rod (7) is slidably passed through the first sliding sleeve (11). The end of the first sliding rod (7) is snapped onto the wall of the filter box (1). The second transverse sliding seat (9) is respectively fitted with a second threaded cylinder (10) and a second sliding sleeve (13). The second threaded cylinder (10) is threaded with a second threaded rod (12). The end of the second threaded rod (12) is rotatably connected to the wall of the filter box (1). The second sliding sleeve (13) is slidably fitted with a second sliding rod (14). The end of the second sliding rod (14) is fitted with the wall of the filter box (1). The ends of the first threaded rod (6) and the second threaded rod (12) are both fixedly sleeved with a first gear (15). A motor (18) is installed on the front of the filter box (1). A second gear (16) is fixedly sleeved on the output shaft of the motor (18). The second gear (16) is connected to the two first gears (15) through a toothed chain (17).

3. The device for harmless treatment of waste gas from epoxy powder coating production according to claim 2, characterized in that: The front and rear side walls of the combined opening (28) are provided with sliding grooves (29). The two sliding grooves (29) and the combined opening (28) are slidably fitted with a slide seat (30). The dust cover (8) is fixedly connected to the inner side of the slide seat (30). Each sliding groove (29) is embedded with a first spring (31). The slide seat (30) is elastically supported by the inner walls of the two sliding grooves (29) through multiple first springs (31).

4. The device for harmless treatment of waste gas from epoxy powder coating production according to claim 3, characterized in that: The inner wall of the dust hood (8) is fitted with a frame (32), and the bottom of the frame (32) is fitted with a plurality of sleeves (33). Each sleeve (33) has an adapter (34) fitted into the port at the top of its top. Each adapter (34) is rotatably connected to a first rotating shaft (35), and a first spiral blade (36) is wound around the first rotating shaft (35). The top end of the first rotating shaft (35) is fixedly sleeved with a first bevel gear (37), and the tooth surfaces of each first bevel gear (37) are meshed with a second bevel gear (38). The inner sides of multiple second bevel gears (38) are fixedly connected to a gear shaft (39). The two ends of the gear shaft (39) are respectively provided with a first ratchet assembly (40) and a second ratchet assembly (41). The two ends of the gear shaft (39) are rotatably connected to the front and back of the dust collection hood (8). The first ratchet assembly (40) and the second ratchet assembly (41) have the same structure. The rear wall and the front wall of the filter box (1) are both provided with strip grooves (64). The bottom of the inner side of one strip groove (64) and the top of the inner side of the other strip groove (64) are fixedly connected with toothed plates (62). The two toothed plates (62) are respectively meshed with the first ratchet assembly (40) and the second ratchet assembly (41).

5. The device for harmless treatment of waste gas from epoxy powder coating production according to claim 4, characterized in that: The first ratchet assembly (40) includes a third gear (401) fixedly sleeved on the end of the gear shaft (39). The third gear (401) meshes with the gear plate (62). A groove (402) is provided on the side of the third gear (401) near the dust cover (8). An inner tooth surface (403) is provided on the inner sidewall of the groove (402). A ratchet (404) meshes on the inner tooth surface (403). The other end of the ratchet (404) is rotatably connected to a transition shaft (405). The other end of the transition shaft (405) is fixedly connected to the gear shaft (39). A second spring (406) is sleeved on the transition shaft (405). The ratchet (404) and the transition shaft (405) form an elastic rotational engagement through the second spring (406).

6. The device for harmless treatment of waste gas from epoxy powder coating production according to claim 5, characterized in that: The bottom of the dust cover (8) is provided with a spiral groove (46), and a spiral frame (56) is embedded in the spiral groove (46). A plurality of third springs (59) are fixedly connected to the top of the spiral frame (56). The spiral frame (56) and the top of the spiral groove (46) are elastically supported by the plurality of third springs (59). Each of the first rotating shafts (35) has a combination groove (44) at its bottom end. The inner wall of the combination groove (44) has a keyway (45). A combination shaft (48) is inserted into the combination groove (44). A spline (49) is provided on the shaft surface of the combination shaft (48). The combination shaft (48) slides with the keyway (45) through the spline (49). A second rotating shaft (50) is fixedly connected to the bottom end of the combination shaft (48). A second helical blade (51) is wound on the shaft surface of the second rotating shaft (50). A brush (52) is provided on the lower surface of the second helical blade (51). A linkage shaft (53) is fixedly connected to the axial surface of the second rotating shaft (50). An inner ring (63) is fixedly connected to the other end of the linkage shaft (53). An adapter sleeve (54) is rotatably connected to the outer ring surface of the inner ring (63). Multiple brackets (55) are fixedly connected to the outer ring surface of the adapter sleeve (54). The adapter sleeve (54) is fixedly connected to the inner wall of the loop frame (56) through multiple brackets (55).

7. The device for harmless treatment of waste gas from epoxy powder coating production according to claim 6, characterized in that: The first helical blade (36) has a first micropore (42), and the second helical blade (51) has a second micropore (43).

8. The device for harmless treatment of waste gas from epoxy powder coating production according to claim 7, characterized in that: Two through holes (47) are opened on the top of the inner side of the groove (46). An L-shaped plate (57) is slidably connected in both through holes (47). A matching interface (58) is opened on the L-shaped plate (57) corresponding to the gear shaft (39). A vibrator (60) is installed on the top of each L-shaped plate (57).

9. The device for harmless treatment of waste gas from epoxy powder coating production according to claim 8, characterized in that: A pulse valve (61) is installed on the blower pipe (25).

10. The device for harmless treatment of waste gas from epoxy powder coating production according to claim 9, characterized in that: The filter box (1) has a partition plate (19) embedded in its inner wall. U-shaped tubes (22) are snapped on the upper and lower sides of the front of the filter box (1) corresponding to the partition plate (19). A guide plate (20) is provided on the inner wall of the filter box (1) below the partition plate (19). A tail pipe (23) is connected to the back of the filter box (1). A sewage pipe (21) is connected to the bottom of the filter box (1).

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