Dust filtering and purifying device for coating production

Abstract

The invention discloses a dust filtering and purifying device for coating production, and belongs to the technical field of dust purification, a plurality of groups of filter elements are mounted on a first platform, a plurality of groups of collecting bins coaxial with the filter elements are fixedly arranged at the top of a second platform, a cleaning gear is movably mounted at the bottom of the second platform, and a brush is mounted at the upper end of a rotating shaft; a through hole groove is formed in the bottom of the collecting bin, and an extruding plug which is opened intermittently is movably installed in the discharging opening. And a filter cylinder coaxial with the annular plate is installed in the filter cavity, a through rotating cavity is formed in the middle of the annular plate, a rotating cylinder is movably installed in the rotating cavity, and a plurality of sets of scraping plates are fixedly arranged on the inner wall of the rotating cylinder. Air can be doubly filtered through a filter element and a filter cylinder, when a rotating shaft drives a fan-shaped gate plate to rotate, the fan-shaped gate plate shields a discharging opening in a fixed discharging plate, an extrusion arm extrudes an extrusion plug downwards, at the moment, dust in a collecting bin falls to the bottom under scraping of the extrusion arm, and the practicability is improved through the design.

Description

Technical Field

[0001] The invention relates to the technical field of dust purification, in particular to a dust filtering and purification device for coating production. Background Art

[0002] Paint is a kind of coating that is applied to the surface of the object to be protected or decorated and can form a continuous film that is firmly attached to the coated object. During the production process of paint, various solid materials will generate a large amount of dust when they are fed, dispersed, crushed and ground, which reduces the air quality in the workshop. Long-term inhalation of dust by workers has a serious impact on their health.

[0003] The patent application with publication number CN109985473A discloses an air purification device for powder coating production, including a support frame, wherein a first purification box and a second purification box are fixedly connected in sequence from left to right inside the support frame, wherein a solid filter chamber is arranged inside the first purification box, and a first exhaust pipe is passed through the right side of the first purification box near the bottom of the solid filter chamber, and an exhaust fan is fixedly connected to the end of the first exhaust pipe away from the first purification box. The air purification device for powder coating production achieves the purpose of recycling air at any position in the workshop by providing an exhaust fan and wheels; by providing a sponge, the paint dust in the air is recycled and reused conveniently, saving resources; by filling the liquid filter chamber with a microbial solution, not only the dust in the air can be further purified, but also the volatile organic matter in the air can be decomposed; by providing activated carbon, the purpose of further purifying the air is achieved.

[0004] However, the air purification device disclosed above has a general processing efficiency, cannot purify the dust in the air multiple times, and cannot collect and reuse the paint powder in the air, and lacks a linked cleaning and collection mechanism. Summary of the invention

[0005] The purpose of the present invention is to provide a dust filtering and purification device for paint production in order to solve the problems that the existing air purification devices have general processing efficiency, cannot purify dust in the air multiple times, cannot collect and reuse paint powder in the air, and lack a linked cleaning and collection mechanism.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present invention is: a dust filtering and purification device for paint production, comprising a shell, a first platform and a second platform are fixedly arranged inside the shell, a plurality of groups of filter elements are installed on the first platform, a plurality of groups of collecting bins coaxial with the filter elements are fixedly arranged on the top of the second platform, a cleaning gear is movably installed on the bottom of the second platform, a rotating shaft penetrating the first platform and the second platform is fixedly arranged on the top of the cleaning gear, and a brush is installed on the upper end of the rotating shaft; a through hole groove is provided at the bottom of the collecting bin, and an intermittently opened extrusion plug is movably installed in the hole groove; an annular plate is fixedly arranged at the bottom of the second platform, a first boss connected to the shell is fixedly arranged at the bottom of the annular plate, and a filter chamber is formed between the annular plate and the shell; a filter cartridge coaxially arranged with the annular plate is installed in the filter chamber, a through rotating chamber is provided in the middle of the annular plate, a rotating cylinder is movably installed in the rotating chamber, and a plurality of scrapers are fixedly arranged on the inner wall of the rotating cylinder.

[0007] As a further solution of the present invention: a top cover is installed on the top of the outer shell, a main air intake pipe is arranged on the top cover, a plurality of sub-air intake pipes are connected to the bottom of the main air intake pipe, an upper mounting seat is fixedly arranged on the bottom of the sub-air intake pipe, a plurality of lower mounting seats are fixedly arranged on the top of the first platform, and the filter element is fixedly arranged between the upper mounting seat and the lower mounting seat.

[0008] As a further solution of the present invention: a fixed unloading plate coaxial with the filter element is fixedly installed on the first platform, a unloading port is opened on the fixed unloading plate, a fan-shaped gate plate cooperating with the fixed unloading plate is installed on the rotating shaft, and a push plate for unloading is fixedly provided on the fan-shaped gate plate.

[0009] As a further solution of the present invention: a mounting ring is fixedly provided on the inner wall of the hole, the extrusion plug is movably installed on the mounting ring, a bottom plate for shielding the bottom of the hole is fixedly provided on the bottom of the extrusion plug, an inclined surface is provided on the bottom plate, an elastic member coaxially arranged with the extrusion plug is connected to the inclined surface, the top of the elastic member is connected to the mounting ring, and an extrusion arm cooperating with the extrusion plug is also installed on the rotating shaft.

[0010] As a further solution of the present invention: a first gear ring meshing with multiple groups of cleaning gears is movably installed at the bottom of the second platform, a cleaning motor 1 is fixedly installed at the bottom of the second platform, and a driving gear 1 meshing with the first gear ring is installed at the output end of the cleaning motor 1.

[0011] As a further solution of the present invention: a hanging rail is arranged on the top of the first gear ring, and a rotating groove cooperating with the hanging rail is opened on the bottom of the second platform.

[0012] As a further solution of the present invention: a plurality of groups of first air outlet holes are provided on the first platform, a second air outlet hole connected to the filter chamber is provided on the second platform, a plurality of groups of exhaust grooves connected to the filter chamber are provided on the outer shell, a collecting shell is installed on the outer wall of the outer shell, and an exhaust pipe is provided on the collecting shell.

[0013] As a further solution of the present invention: a second boss located below the first boss is fixedly provided on the inner wall of the outer shell, a plurality of upper slag discharge ports are evenly spaced apart on the first boss, and a plurality of lower slag discharge ports offset from the upper slag discharge ports are provided on the second boss; a first shielding fan cooperating with the upper slag discharge ports is fixedly provided on the bottom of the scraper, and a plurality of second shielding fans cooperating with the lower slag discharge ports are fixedly provided on the inner wall of the rotating cylinder.

[0014] As a further solution of the present invention: a second gear ring is fixedly provided at the bottom of the second shielding fan, and a power compartment located below the second boss is also provided on the inner wall of the outer shell, a cleaning motor 2 is installed in the power compartment, and a driving gear 2 meshing with the second gear ring is installed at the output end of the cleaning motor 2.

[0015] As a further solution of the present invention: a control panel is also arranged on the outer wall of the shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can perform double filtration on the air through the filter element and the filter cartridge. When the filter element filters the air for the first time, dust will adhere to its inner wall. When the cleaning motor drives the brush to rotate, the fallen paint dust will fall on the fan-shaped gate and the fixed feed plate. When the rotating shaft drives the fan-shaped gate to rotate, the dust falls into the collection bin below under the action of inertia and the push plate. At this time, the hole groove is closed, so the airflow will not disturb the dust inside. When the rotating shaft continues to rotate, the fan-shaped gate blocks the feed port on the fixed feed plate, and the squeezing arm squeezes the squeezing plug downward. At this time, the dust in the collection bin passes through the hole groove under the scraping of the squeezing arm and falls into the interior of the equipment. This design improves the practicality of the dust filtering and purification device for paint production.

[0017] 2. The present invention can reciprocately clean the inner wall of the filter cartridge and intermittently discharge the paint particles through the scraper and the rotating drum. Since the upper slag discharge port and the lower slag discharge port are misaligned, when the second shielding fan shields the lower slag discharge port, the upper slag discharge port is opened, and the scraped residue falls into the transfer bin composed of the first boss and the second boss for temporary storage. When the first shielding fan shields the upper slag discharge port, the lower slag discharge port below is opened, and the residue temporarily stored in the transfer bin falls into the interior of the device. This design improves the stability of the dust filtration and purification device for paint production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a three-dimensional structural diagram of the present invention; Figure 2 It is a vertical cross-sectional view of the present invention; Figure 3 yes Figure 2 A magnified view of the structure at center A; Figure 4 It is a cross-sectional view of the housing in the present invention Figure 1 ; Figure 5 is a cross-sectional view of the present invention in the horizontal direction; Figure 6 It is a matching diagram of the fan-shaped gate and the extrusion plug in the present invention; Figure 7 It is a three-dimensional structural diagram of the housing in the present invention; Figure 8 It is a cross-sectional view of the housing in the present invention Figure 2 ; Fig. 9 It is a three-dimensional structural diagram of the rotating cylinder in the present invention.

[0019] Description of reference numerals: 1. Shell; 2. Top cover; 3. Control panel; 4. First platform; 5. Second platform; 6. Main air inlet pipe; 7. Sub-air inlet pipe; 8. Upper mounting seat; 9. Lower mounting seat; 10. Filter element; 11. Collection bin; 12. Cleaning gear; 13. Rotating shaft; 14. Brush; 15. First gear ring; 16. Cleaning motor 1; 17. Driving gear 1; 18. Fixed feed plate; 19. Feed port; 20. Fan-shaped gate; 21. Push plate; 22. Hole groove; 23. Mounting ring; 24. Extrusion plug; 25. Bottom plate; 26. Inclined surface; 27. Spring Components; 28. Extrusion arm; 29. ​​Hanging rail; 30. Rotating groove; 31. First air outlet; 32. Second air outlet; 33. Annular plate; 34. First boss; 35. Filter chamber; 36. Filter cartridge; 37. Exhaust groove; 38. Collecting shell; 39. Exhaust pipe; 40. Rotating chamber; 41. Rotating cartridge; 42. Scraper; 43. Second boss; 44. Upper slag discharge port; 45. Lower slag discharge port; 46. First shielding fan; 47. Second shielding fan; 48. Second gear ring; 49. Power compartment; 50. Cleaning motor two; 51. Driving gear two. DETAILED DESCRIPTION

[0020] The following will be combined with the attached Figures 1 to 9The technical solution of the present invention is described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention provides a dust filtering and purification device for coating production through improvement. Figure 1-Figure 9 As shown, the housing 1 includes a first platform 4 and a second platform 5 fixedly arranged inside the housing 1, a plurality of filter elements 10 are installed on the first platform 4, a plurality of collection bins 11 coaxial with the filter elements 10 are fixedly arranged on the top of the second platform 5, a cleaning gear 12 is movably installed on the bottom of the second platform 5, a rotating shaft 13 penetrating the first platform 4 and the second platform 5 is fixedly arranged on the top of the cleaning gear 12, a brush 14 is installed on the upper end of the rotating shaft 13; a through hole 22 is opened at the bottom of the collection bin 11, and the hole 22 An intermittently opened extrusion plug 24 is movably installed in 22; an annular plate 33 is fixedly installed at the bottom of the second platform 5, and a first boss 34 connected to the outer shell 1 is fixedly installed at the bottom of the annular plate 33, and a filter chamber 35 is formed between the annular plate 33 and the outer shell 1; a filter cartridge 36 coaxially arranged with the annular plate 33 is installed in the filter chamber 35, and a rotating chamber 40 is penetrated in the middle of the annular plate 33, a rotating cylinder 41 is movably installed in the rotating chamber 40, and a plurality of scrapers 42 are fixedly arranged on the inner wall of the rotating cylinder 41.

[0022] In this embodiment: the dust filtration and purification device for paint production is mainly divided into three parts: housing 1, filter element 10 and filter cartridge 36. When the device is in use, the air in the paint production workshop is first introduced into the interior of the device through the main air inlet pipe 6. The air to be treated is diverted to the sub-air inlet pipe 7 and enters the interior of the filter element 10. The air preliminarily filtered by the filter element 10 enters the filter chamber 35 through the first air outlet 31 and the second air outlet 32, and the air filtered again by the filter cartridge 36 is discharged from the exhaust pipe 39. When the rotating shaft 13 drives the fan-shaped gate plate 20 to rotate, the dust falls into the collection bin 11 below under the action of inertia and the push plate 21, and the squeezing arm 28 is away from the squeezing plug 24 and the hole 22 is closed. Then the rotating shaft 13 continues to rotate, and the fan-shaped gate plate 20 blocks the discharge port 19 on the fixed discharge plate 18, and under the action of the squeezing arm 28, the dust in the collection bin 11 passes through the hole 22 and falls into the interior of the device. When the rotating drum 41 rotates, the scraper 42 can reciprocate and clean the inner wall of the filter drum 36. When the second shielding fan 47 shields the lower slag discharge port 45, the scraped residue falls between the first boss 34 and the second boss 43. When the first shielding fan 46 shields the upper slag discharge port 44, the lower slag discharge port 45 below is opened, and the residue temporarily stored between the first boss 34 and the second boss 43 falls into the interior of the device.

[0023] See attached Figure 1 -Attached Figure 2 A top cover 2 is installed on the top of the outer shell 1, and a main air inlet pipe 6 is arranged on the top cover 2. A plurality of sub-air inlet pipes 7 are connected to the bottom of the main air inlet pipe 6. An upper mounting seat 8 is fixedly arranged at the bottom of the sub-air inlet pipe 7. A plurality of lower mounting seats 9 are fixedly arranged on the top of the first platform 4. A filter element 10 is fixedly installed between the upper mounting seat 8 and the lower mounting seat 9.

[0024] In this embodiment, in order to improve the gas purification effect and further improve the efficiency, multiple groups of sub-intake pipes 7 and filter elements 10 are designed. In order to facilitate the replacement and disassembly of the filter element 10, an upper mounting seat 8 and a lower mounting seat 9 structure that cooperate with each other are designed.

[0025] See attached Figure 2 and attached Figure 6 A fixed unloading plate 18 coaxial with the filter element 10 is fixedly installed on the first platform 4, and a unloading port 19 is opened on the fixed unloading plate 18. A fan-shaped gate plate 20 cooperating with the fixed unloading plate 18 is installed on the rotating shaft 13, and a push plate 21 for unloading is fixedly set on the fan-shaped gate plate 20.

[0026] In this embodiment: when the cleaning motor 16 drives the brush 14 to rotate, the falling paint dust will fall on the fan-shaped gate 20 and the fixed unloading plate 18. When the rotating shaft 13 drives the fan-shaped gate 20 to rotate, the dust falls into the collection bin 11 below under the action of inertia and the push plate 21. At this time, the squeezing arm 28 is away from the squeezing plug 24 and the hole 22 is in a closed state. In order to ensure the sealing effect, the area of ​​the fan-shaped gate 20 is larger than the unloading port 19.

[0027] See attached Figure 2 and attached Figure 6 A mounting ring 23 is fixedly provided on the inner wall of the hole 22, and an extrusion plug 24 is movably installed on the mounting ring 23. A bottom plate 25 for shielding the bottom of the hole 22 is fixedly provided at the bottom of the extrusion plug 24. An inclined surface 26 is provided on the bottom plate 25. An elastic member 27 coaxially arranged with the extrusion plug 24 is connected to the inclined surface 26. The top of the elastic member 27 is connected to the mounting ring 23. An extrusion arm 28 cooperating with the extrusion plug 24 is also installed on the rotating shaft 13.

[0028] In this embodiment: when the rotating shaft 13 continues to rotate, the fan-shaped gate plate 20 blocks the discharge port 19 on the fixed discharge plate 18, and the squeezing arm 28 squeezes the squeezing plug 24 downward, and the dust in the collection bin 11 passes through the hole 22 and falls into the interior of the device under the scraping of the squeezing arm 28. When the squeezing arm 28 is separated from the squeezing plug 24, the squeezing plug 24 returns to its original position under the action of the elastic member 27, and the bottom plate 25 blocks the bottom of the hole 22. In order to prevent dust from remaining on the bottom plate 25, a slope 26 structure is designed.

[0029] See attached Figure 2 and attached Figure 5 A first gear ring 15 meshing with multiple cleaning gears 12 is movably installed at the bottom of the second platform 5, a cleaning motor 16 is fixedly installed at the bottom of the second platform 5, and a driving gear 17 meshing with the first gear ring 15 is installed at the output end of the cleaning motor 16.

[0030] In this embodiment, in order to drive the first gear ring 15 to rotate automatically, thereby realizing automatic cleaning of the filter element 10 and intermittent discharge of dust, a cleaning motor 16 structure is designed.

[0031] See attached Figure 2 -Attached Figure 3 A hanging rail 29 is provided at the top of the first gear ring 15 , and a rotating groove 30 cooperating with the hanging rail 29 is opened at the bottom of the second platform 5 .

[0032] In this embodiment, in order to install the first gear ring 15 at the bottom of the second platform 5 and ensure its stability during rotation, a hanging rail 29 and a rotation groove 30 that cooperate with each other are designed.

[0033] See attached Figure 2 and attached Figure 8 The first platform 4 is provided with a plurality of first air outlet holes 31 penetrating therethrough, the second platform 5 is provided with a second air outlet hole 32 communicating with the filter chamber 35, the outer shell 1 is provided with a plurality of exhaust grooves 37 communicating with the filter chamber 35, a collecting shell 38 is installed on the outer wall of the outer shell 1, and an exhaust pipe 39 is provided on the collecting shell 38.

[0034] In this embodiment, the air purified by the filter element 10 enters the filter cavity 35 through the first air outlet 31 and the second air outlet 32 ​​in sequence. The air filtered again by the filter cartridge 36 enters the collection shell 38 through the exhaust groove 37 and is finally discharged through the exhaust pipe 39.

[0035] See attached Figure 4 and attached Figure 8 -Attached Fig. 9A second boss 43 located below the first boss 34 is fixedly provided on the inner wall of the outer shell 1, a plurality of upper slag discharge ports 44 are evenly spaced on the first boss 34, and a plurality of lower slag discharge ports 45 staggered with the upper slag discharge ports 44 are provided on the second boss 43; a first shielding fan 46 cooperating with the upper slag discharge port 44 is fixedly provided at the bottom of the scraper 42, and a plurality of second shielding fans 47 cooperating with the lower slag discharge port 45 are fixedly provided on the inner wall of the rotating cylinder 41.

[0036] In this embodiment: when the rotating drum 41 rotates, the scraper 42 can reciprocate and clean the inner wall of the filter drum 36. Since the upper slag discharge port 44 and the lower slag discharge port 45 are misaligned, when the second shielding fan 47 shields the lower slag discharge port 45, the upper slag discharge port 44 is opened, and the scraped residue falls into the transfer bin composed of the first boss 34 and the second boss 43 for temporary storage. When the rotating drum 41 continues to rotate, when the first shielding fan 46 shields the upper slag discharge port 44, the lower slag discharge port 45 below is opened, and the residue temporarily stored in the transfer bin falls into the interior of the device.

[0037] See attached Figure 8 -Attached Fig. 9 A second gear ring 48 is fixedly provided at the bottom of the second shielding fan 47, and a power compartment 49 located below the second boss 43 is also provided on the inner wall of the outer shell 1. A cleaning motor 50 is installed in the power compartment 49, and a driving gear 51 meshing with the second gear ring 48 is installed at the output end of the cleaning motor 50.

[0038] In this embodiment, in order to drive the second gear ring 48 to rotate, thereby achieving the cleaning of the filter cartridge 36 and the intermittent discharge of residues, a cleaning motor 50 structure is designed.

[0039] See attached Figure 1 and attached Figure 5 A control panel 3 is also provided on the outer wall of the shell 1.

[0040] In this embodiment, in order to control the operation of the device, a control panel 3 structure is designed.

[0041] Working principle of the present invention: When the device is in use, the air in the paint production workshop is first introduced into the interior of the device through the main air inlet pipe 6. The air to be treated is diverted to the sub-air inlet pipe 7 and enters the interior of the filter element 10. The air preliminarily filtered by the filter element 10 enters the filter chamber 35 through the first air outlet 31 and the second air outlet 32, and the air filtered again by the filter cartridge 36 is discharged from the exhaust pipe 39. When the rotating shaft 13 drives the fan-shaped gate plate 20 to rotate, the dust falls into the collection bin 11 below under the action of inertia and the push plate 21, and the squeezing arm 28 is away from the squeezing plug 24 and the hole 22 is in a closed state. Then the rotating shaft 13 continues to rotate, and the fan-shaped gate plate 20 blocks the discharge port 19 on the fixed discharge plate 18, and under the action of the squeezing arm 28, the dust in the collection bin 11 passes through the hole 22 and falls into the interior of the device. When the rotating drum 41 rotates, the scraper 42 can reciprocate and clean the inner wall of the filter drum 36. When the second shielding fan 47 shields the lower slag discharge port 45, the scraped residue falls between the first boss 34 and the second boss 43. When the first shielding fan 46 shields the upper slag discharge port 44, the lower slag discharge port 45 below is opened, and the residue temporarily stored between the first boss 34 and the second boss 43 falls into the interior of the device.

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and inventive features disclosed herein.

Claims

1. A dust filtering and purification device for coating production, comprising a housing (1), characterized in that: A first platform (4) and a second platform (5) are fixedly arranged inside the housing (1); a plurality of filter cartridges (10) are mounted on the first platform (4); a plurality of collecting bins (11) coaxial with the filter cartridges (10) are fixedly arranged on the top of the second platform (5); a cleaning gear (12) is movably mounted on the bottom of the second platform (5); a rotating shaft (13) penetrating the first platform (4) and the second platform (5) is fixedly arranged on the top of the cleaning gear (12); a brush (14) is mounted on the upper end of the rotating shaft (13); a through hole (22) is provided at the bottom of the collecting bin (11); an intermittently opened squeezing plug (24) is movably mounted in the hole (22); An annular plate (33) is fixedly arranged at the bottom of the second platform (5), a first boss (34) connected to the outer shell (1) is fixedly arranged at the bottom of the annular plate (33), and a filter chamber (35) is formed between the annular plate (33) and the outer shell (1); a filter cartridge (36) coaxially arranged with the annular plate (33) is installed in the filter chamber (35), a rotating chamber (40) penetrating the middle of the annular plate (33) is opened, a rotating cylinder (41) is movably installed in the rotating chamber (40), and a plurality of scraper plates (42) are fixedly arranged on the inner wall of the rotating cylinder (41).

2. The dust filtering and purification device for coating production according to claim 1 is characterized in that: A top cover (2) is installed on the top of the housing (1), a main air intake pipe (6) is arranged on the top cover (2), a plurality of sub-air intake pipes (7) are connected to the bottom of the main air intake pipe (6), an upper mounting seat (8) is fixedly arranged at the bottom of the sub-air intake pipe (7), a plurality of lower mounting seats (9) are fixedly arranged on the top of the first platform (4), and the filter element (10) is fixedly installed between the upper mounting seat (8) and the lower mounting seat (9).

3. The dust filtering and purification device for coating production according to claim 1 is characterized in that: A fixed material discharge plate (18) coaxial with the filter element (10) is fixedly mounted on the first platform (4), a material discharge opening (19) is provided on the fixed material discharge plate (18), a fan-shaped gate plate (20) cooperating with the fixed material discharge plate (18) is mounted on the rotating shaft (13), and a push plate (21) for material discharge is fixedly arranged on the fan-shaped gate plate (20).

4. The dust filtering and purification device for coating production according to claim 1 is characterized in that: A mounting ring (23) is fixedly arranged on the inner wall of the hole (22); the extrusion plug (24) is movably mounted on the mounting ring (23); a bottom plate (25) for shielding the bottom of the hole (22) is fixedly arranged on the bottom of the extrusion plug (24); an inclined surface (26) is arranged on the bottom plate (25); an elastic member (27) coaxially arranged with the extrusion plug (24) is connected to the inclined surface (26); the top of the elastic member (27) is connected to the mounting ring (23); and an extrusion arm (28) cooperating with the extrusion plug (24) is also mounted on the rotating shaft (13).

5. A dust filtering and purification device for coating production according to any one of claims 1 to 4, characterized in that: A first gear ring (15) meshing with the plurality of cleaning gears (12) is movably mounted on the bottom of the second platform (5), a cleaning motor (16) is fixedly mounted on the bottom of the second platform (5), and a driving gear (17) meshing with the first gear ring (15) is mounted on the output end of the cleaning motor (16).

6. The dust filtering and purification device for coating production according to claim 5, characterized in that: A hanging rail (29) is provided at the top of the first gear ring (15), and a rotating groove (30) cooperating with the hanging rail (29) is provided at the bottom of the second platform (5).

7. The dust filtering and purification device for coating production according to claim 1 is characterized in that: The first platform (4) is provided with a plurality of groups of first air outlet holes (31) extending therethrough, the second platform (5) is provided with second air outlet holes (32) communicating with the filter chamber (35), the outer shell (1) is provided with a plurality of groups of exhaust grooves (37) communicating with the filter chamber (35), a collecting shell (38) is mounted on the outer wall of the outer shell (1), and an exhaust pipe (39) is arranged on the collecting shell (38).

8. The dust filtering and purification device for coating production according to claim 1 is characterized in that: A second boss (43) located below the first boss (34) is fixedly provided on the inner wall of the shell (1); a plurality of groups of upper slag discharge ports (44) are evenly spaced apart on the first boss (34); a plurality of groups of lower slag discharge ports (45) offset from the upper slag discharge ports (44) are provided on the second boss (43); a first shielding fan (46) cooperating with the upper slag discharge ports (44) is fixedly provided at the bottom of the scraper (42); a plurality of groups of second shielding fans (47) cooperating with the lower slag discharge ports (45) are fixedly provided on the inner wall of the rotating cylinder (41).

9. The dust filtering and purification device for coating production according to claim 8, characterized in that: A second gear ring (48) is fixedly provided at the bottom of the second shielding fan (47), and a power compartment (49) located below the second boss (43) is also provided on the inner wall of the housing (1). A second cleaning motor (50) is installed in the power compartment (49), and a second driving gear (51) meshing with the second gear ring (48) is installed at the output end of the second cleaning motor (50).

10. A dust filtering and purification device for coating production according to any one of claims 1 to 4, characterized in that: A control panel (3) is also provided on the outer wall of the housing (1).

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