An automatic powder collecting device for coating lines

Abstract

The present invention discloses an automatic powder collecting device for a coating line in the technical field of powder collection of coating lines, comprising a mounting base, a fixed bracket fixedly connected to the top of the mounting base, the fixed bracket being in a tetrahedron shape, a conveyor belt fixedly connected to the mounting base for conveying materials, and an opening and closing mechanism for cooperating with a conveying mechanism to seal the left and right sides of the fixed bracket. The present invention utilizes the fixed base, the fixed bracket, the conveyor belt in conjunction with the opening and closing mechanism, the first recovery mechanism and the second recovery mechanism each time the coating line is subjected to powder coating, so as to timely recover excess paint and flying paint after each spraying, avoid the participation of personnel, greatly improve the efficiency of recovery, save costs, and avoid the flying and scattering of powder, so as to achieve more thorough recovery.

Description

Technical Field

[0001] The invention relates to the technical field of powder collection for coating lines, in particular to an automatic powder collection device for coating lines. Background Art

[0002] Powder coatings are completely different from regular coatings, existing in a fine powder form. They are called powder coatings because they do not use solvents. During the production process, the material is usually continuously transported to the coating location. Then, the powder is sprayed onto the surface of the material using industrial robots or manual labor.

[0003] In the existing technology, when materials are coated in the coating line, the coating powder will first be scattered at the coating position, and secondly, it will float in the air. Most of the coating powder can be recycled again after the coating is completed. The existing technology usually uses personnel to recycle the powder after the coating is completed, which not only reduces production efficiency but also requires huge labor costs. In addition, the powder floating in the air is difficult to be recovered in time and is easy to float into the production area, causing harm to personnel. Therefore, how to effectively and quickly automatically recycle the powder after spraying is an urgent problem that needs to be solved. Summary of the Invention

[0004] The object of the present invention is to provide an automatic powder collecting device for a coating line to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an automatic powder collecting device for a coating line, comprising a mounting base, a fixed bracket fixedly connected to the top of the mounting base, the fixed bracket being in the shape of a tetrahedron, a conveyor belt fixedly connected to the mounting base for conveying materials, an opening and closing mechanism for cooperating with a conveying mechanism to seal the left and right sides of the fixed bracket, a cover fixedly connected to the top of the fixed bracket, a first recovery mechanism for sealing the front and rear sides of the fixed bracket and recovering powder floating in the air, a collecting port being provided on the top of the mounting base, and a second recovery mechanism for collectively recovering the powder recovered by the first recovery mechanism and the powder directly fallen is provided below the collecting port;

[0006] The filter cloth of the present invention is fixedly connected to the side wall of the fixed bracket, and the filter cloth completely covers the side of the fixed bracket, and a plurality of first connecting pipes arranged up and down are fixedly connected to the outer wall of the fixed bracket, the outlet of the first connecting pipe is in contact with the outer wall of the filter cloth, the left ends of the plurality of first connecting pipes are fixedly connected to the second connecting pipe, the second connecting pipe is fixedly connected to the suction machine, the suction machine is fixedly connected to the top of the mounting base, the top of the cover plate is fixedly connected to a plurality of one-way air intake valves that can only intake air inwardly, an inclined guide plate is fixedly connected to the inner side wall of the fixed bracket, the outer end of the guide plate contacts the inner side wall of the filter cloth, the guide plate is used to guide the powder to the collection port, and a scraping mechanism for scraping and discharging the material adhering to the surface of the filter cloth is provided on the inside of the filter cloth;

[0007] The scraper mechanism includes a scraper plate, the scraper plate is slidably connected to the inner side wall of the fixed bracket, the scraper plate contacts the inner side wall of the filter cloth, the bottom of the scraper plate is fixedly connected to the first pull rope, the bottom of the mounting base is rotatably connected to the first take-up drum and the second take-up drum. The bottom end of the first pull rope passes through the mounting base and is wound around the first take-up drum. The outer end of the second pull rope passes through the fixed bracket, passes around the guide bracket and is finally wound around the outer surface of the second take-up drum. The outer surfaces of the rotating shafts of the first take-up drum and the second take-up drum are fixedly connected. The two synchronous gears are meshed, and the outer end of the first take-up drum is fixedly connected to the first motor, and the first motor is fixedly connected to the bottom of the mounting base;

[0008] The second recovery mechanism includes a recovery drum, which is rotatably connected to the bottom of the mounting base. A plurality of recovery slots in a circumferential array are provided inside the recovery drum, and the recovery slots are located below the collection port. A collection shell is sleeved on the outside of the recovery drum, and the collection shell is fixedly connected to the bottom of the mounting base. The bottom of the collection shell is fixedly connected to an outlet slot. The left and right ends of the recovery drum are connected to a switching mechanism for driving the recovery drum to rotate and switch the recovery slot each time the opening and closing mechanism is sealed.

[0009] The opening and closing mechanism includes an opening and closing door, the front and rear ends of the top of the opening and closing door are rotatably connected to the side walls of the fixed bracket through a first rotating shaft, the top of the mounting base is fixedly connected to a first sealing plate, the top of the first sealing plate is flush with the top of the conveyor belt, and the first sealing plate seals the middle position of the conveyor belt, the bottom of the opening and closing door is in contact with the conveyor belt and the top of the first sealing plate, a second motor is fixedly connected to the side wall of the fixed bracket, and the output end of the second motor is fixedly connected to one of the first rotating shafts;

[0010] The switching mechanism includes a first gear, the first gear being connected to the first rotating shaft at the rear side through a one-way bearing, the bottom of the mounting base being rotatably connected to the first rotating rod, the outer surface of the first rotating rod being fixedly connected to the second gear, the second gear and the first gear being connected through a first tooth chain transmission, the bottom of the mounting base being rotatably connected to the second rotating rod, the outer surfaces of the second rotating rod and the first rotating rod are both fixedly connected to the third gear, the two third gears are connected through a second tooth chain transmission, the front end of the second rotating rod is fixedly connected to the worm, and the outer surface of the outer end rotating shaft of the recovery drum is fixedly connected to a turbine, and the turbine is meshed with the worm;

[0011] The bottom of the cover plate is fixedly connected to a plurality of U-shaped mounting plates in a linear array, and the middle position of the bottom of each U-shaped mounting plate is rotatably connected to a plurality of blowing blades, and the blowing blades are used to blow the powder on the top of the conveyor belt;

[0012] The conveyor belt is a mesh conveyor belt, and is used to make the powder falling on it fall down.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention utilizes a fixed base plate, a fixed bracket, a conveyor belt, an opening and closing mechanism, a first recovery mechanism, and a second recovery mechanism each time the coating line is subjected to powder coating, so as to timely recover the excess paint and flying paint after each spraying, thereby avoiding the involvement of personnel, greatly improving the recovery efficiency, saving costs, and avoiding the flying and scattering of powder, so as to achieve more thorough recovery.

[0015] 2. The present invention guides the powder to the collection port by the guide plate when it falls during each coating process, so that the powder falls into the collection trough on the top of the recovery drum. When a spraying is completed, the opening and closing mechanism is opened and closed again, and the switching mechanism is used to drive the recovery drum to rotate, so that the collection trough originally at the top is rotated to another position, and the new collection trough is rotated to the top, so as to avoid excessive powder staying in the collection trough causing secondary flying, which is conducive to the thorough recovery of the powder. The collection trough rotated to the side or bottom will slowly flow out along the collection shell and the outlet trough for collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a first stereoscopic view of the overall structure of the present invention;

[0017] Figure 2 It is a second stereoscopic view of the overall structure of the present invention;

[0018] Figure 3 This is the third stereoscopic view of the overall structure of the present invention (hiding the opening and closing door, the first sealing plate and the cover plate on the left side);

[0019] Figure 4 This is a first schematic diagram of the scraping mechanism structure of the present invention;

[0020] Figure 5 This is a second schematic diagram of the scraping mechanism structure of the present invention;

[0021] Figure 6 This is a schematic diagram of the connection between the cover plate and the U-shaped mounting plate of the present invention;

[0022] Figure 7 This is a schematic structural diagram of the second recovery mechanism of the present invention;

[0023] Figure 8 for Figure 7 A magnified view of the structure at center A;

[0024] Figure 9 This is a schematic diagram of the recovery drum and collection shell structure of the present invention;

[0025] Figure 10 It is a schematic diagram of the U-shaped mounting plate and blowing fan blades of the present invention.

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] Install the base plate 1, the fixed bracket 2, the conveyor belt 3, the cover plate 4, the filter cloth 5, the first connecting pipe 6, the second connecting pipe 7, the suction machine 8, the one-way air intake valve 9, the guide plate 10, the scraper plate 11, the first pull rope 12, the first winding drum 13, the second winding drum 14, the guide bracket 15, the second pull rope 16, the synchronous gear 17, the first motor 18, the recovery drum 19, the recovery trough 20, the collection shell 21, the outlet trough 22, the opening and closing door 23, the first rotating shaft 24, the first sealing plate 25, the second motor 26, the first gear 27, the one-way bearing 28, the first rotating rod 29, the second gear 30, the first tooth chain 31, the second rotating rod 32, the third gear 33, the second tooth chain 34, the worm 35, the turbine 36, the U-shaped mounting plate 37, and the blowing fan blade 38. DETAILED DESCRIPTION

[0028] See also Figures 1-10The present invention provides a technical solution: an automatic powder collecting device for a coating line, comprising a mounting base 1, a fixed bracket 2 is fixedly connected to the top of the mounting base 1, the fixed bracket 2 is in a tetrahedron shape, a conveyor belt 3 for conveying materials is fixedly connected to the mounting base 1, the left and right sides of the fixed bracket 2 are connected to an opening and closing mechanism for cooperating with the conveying mechanism to seal the left and right sides of the fixed bracket 2, a cover plate 4 is fixedly connected to the top of the fixed bracket 2, the front and rear sides of the fixed bracket 2 are connected to a first recovery mechanism for sealing the front and rear sides of the fixed bracket 2 and recovering powder floating in the air, a collecting port is provided on the top of the mounting base 1, and a second recovery mechanism for collectively recovering the powder recovered by the first recovery mechanism and the powder that falls directly is provided below the collecting port;

[0029] When the product needs to be painted, the product to be painted is first processed and placed on the top of the conveyor belt 3. Then, the opening and closing mechanism is started to open the left and right sides of the fixed bracket 2. The conveyor belt 3 drives the product to move from the side opening and closing mechanism position to the inside of the fixed bracket 2. Then, the opening and closing mechanism is closed. The opening and closing mechanism cooperates with the first recovery mechanism on the front and rear sides, the cover plate 4 and the installation base plate 1 to form a sealed chamber, which completely surrounds the product to prevent the powder from flying out during painting. Then, the product is powder-coated. During the painting process, the first recovery mechanism is started. The first recovery mechanism absorbs the powder floating in the air during painting to both sides and filters the powder, so that the powder stays on the inside of the fixed bracket 2, and the powder is continuously dropped down for collection. The powder that falls directly during painting and the powder processed by the first recovery mechanism fall together. The second recovery mechanism is used The structure collects the fallen powder in a centralized manner, which is convenient and quick. After the coating is completed, the conveyor belt 3 is started to drive the product to move to the right and open the opening and closing mechanism inward. Part of the powder located on the inner side of the opening and closing mechanism can fall on the inner side of the fixed bracket 2 as much as possible, preventing the paint from leaving the fixed bracket 2, which is conducive to better and more thorough recovery of the powder. At the same time, the next product can be synchronously conveyed to the inner side of the fixed bracket 2 again for the next spraying operation, with high spraying efficiency. Therefore, each time the coating line performs powder coating on the product, the fixed bottom plate, the fixed bracket 2, the conveyor belt 3 are used in conjunction with the opening and closing mechanism, the first recovery mechanism and the second recovery mechanism to timely recover the excess paint and flying paint after each spraying, avoiding the participation of personnel, greatly improving the efficiency of recovery, saving costs, and avoiding the flying and scattering of powder, and recycling more thoroughly.

[0030] As a further solution of the present invention, the first recovery mechanism includes a filter cloth 5, which is fixedly connected to the side wall of the fixed bracket 2, and the filter cloth 5 completely covers the side of the fixed bracket 2. A plurality of first connecting pipes 6 arranged up and down are fixedly connected to the outer wall of the fixed bracket 2, and the outlet of the first connecting pipe 6 is in contact with the outer wall of the filter cloth 5. The left ends of the plurality of first connecting pipes 6 are fixedly connected to the second through pipe 7, and the second through pipe 7 is fixedly connected to the suction machine 8. The suction machine 8 is fixedly connected to the top of the mounting base 1, and the top of the cover plate 4 is fixedly connected to a plurality of one-way air intake valves 9 that can only intake air inward. An inclined guide plate 10 is fixedly connected to the inner wall of the fixed bracket 2, and the outer end of the guide plate 10 contacts the inner wall of the filter cloth 5. The guide plate 10 is used to guide the powder to the collection port, and a scraping mechanism for scraping and discharging the material adhering to the surface of the filter cloth 5 is provided on the inner side of the filter cloth 5;

[0031] The scraping mechanism includes a scraper plate 11, which is slidably connected to the inner side wall of the fixed bracket 2, and the scraper plate 11 contacts the inner side wall of the filter cloth 5. The bottom of the scraper plate 11 is fixedly connected to a first pull rope 12, and the bottom of the mounting base 1 is rotatably connected to a first winding drum 13 and a second winding drum 14. The bottom end of the first pull rope 12 passes through the mounting base 1 and is wound around the first winding drum 13. A guide bracket 15 is fixedly connected to the side wall of the fixed bracket 2. The top of the scraper plate 11 is fixedly connected to a second pull rope 16. The outer end of the second pull rope 16 passes through the fixed bracket 2, bypasses the guide bracket 15 and is finally wound around the outer surface of the second winding drum 14. The outer surfaces of the rotating shafts of the first winding drum 13 and the second winding drum 14 are fixedly connected with a synchronous gear 17, and the two synchronous gears 17 are meshed. The outer end of the first winding drum 13 is fixedly connected to a first motor 18, and the first motor 18 is fixedly connected to the bottom of the mounting base 1;

[0032] The air in the filter bag 5 is sucked out of the filter bag 5 by the second filter bag 5, and the air in the filter bag 5 is sucked out of the filter bag 5 by the second filter bag 5. The one-way air inlet valve 9 on the top of the cover plate 4 is used to intake air from the top to realize gas flow. When the first connecting pipe 6 sucks the air, the powder flying inside the fixed bracket 2 is simultaneously sucked out, so that the powder is adsorbed on the inner wall of the filter cloth 5, thereby quickly adsorbing the flying powder after each coating, and avoiding the powder from floating on the fixed bracket 2 after the subsequent opening and closing mechanism is opened. After a period of processing, part of the powder will fall directly along the inner side of the filter plate, fall from the collection port through the guide plate 10, and be recovered by the second recovery mechanism, while part of the powder may adhere to the inner wall of the filter cloth 5 without The method is to drop directly. After each opening and closing mechanism is closed, when the spraying operation is performed, the first motor 18 is started, and the first motor 18 drives the first take-up drum 13 to rotate and rewind the first pull rope 12. The first take-up drum 13 drives the second take-up drum 14 to loosen the second pull rope 16 through the synchronous gear 17, so that the first pull rope 12 pulls the scraper plate 11 downward to move, and the scraper plate 11 scrapes the inner wall of the filter cloth 5 to scrape off the powder remaining on the inner wall of the filter cloth 5. Similarly, the first take-up drum 13 is driven in the reverse direction to rotate, loosen the first pull rope 12, and the second take-up drum 14 rewinds the second pull rope 16, pulling the scraper plate 11 upward to reset, thereby achieving the purpose of scraping the powder down better, making the powder collection more thorough, and using the first pull rope 12 and the second pull rope 16 on the inner side of the fixed bracket 2 to avoid the influence of the powder on the components that drive the scraper plate 11 to move up and down. For example, if the scraper plate 11 is driven to move by a screw rod, the powder falling on the surface of the screw rod will affect the driving effect of the screw rod.

[0033] As a further solution of the present invention, the second recovery mechanism includes a recovery drum 19, which is rotatably connected to the bottom of the mounting base 1. A plurality of recovery grooves 20 in a circular array are provided inside the recovery drum 19. The recovery grooves 20 are located below the collection port. A collection shell 21 is provided on the outside of the recovery drum 19. The collection shell 21 is fixedly connected to the bottom of the mounting base 1. The bottom of the collection shell 21 is fixedly connected to the outflow groove 22. The left and right ends of the recovery drum 19 are connected to a switching mechanism for driving the recovery drum 19 to rotate and switch the recovery groove 20 each time the opening and closing mechanism is sealed. During operation, since the powder materials that continue to fall each time are collected and piled up, the subsequent The powder will continue to fall, and the impact of falling will easily cause the powder to fly again. During each coating, when the powder falls, it is guided to the collection port by the guide plate 10, so that the powder falls into the collection trough at the top of the recovery drum 19. When one spraying is completed, the opening and closing mechanism is opened and closed again, and the switching mechanism is used to drive the recovery drum 19 to rotate, so that the collection trough originally at the top is rotated to another position, and the new collection trough is rotated to the top, so as to avoid too much powder staying in the collection trough causing secondary flying, which is conducive to the thorough recovery of the powder. The collection trough rotated to the side or bottom will slowly flow out along the collection shell 21 and the outlet trough 22 for collection.

[0034] As a further solution of the present invention, the opening and closing mechanism includes an opening and closing door 23, the front and rear ends of the top of the opening and closing door 23 are rotatably connected to the side wall of the fixed bracket 2 through a first rotating shaft 24, and the top of the mounting base 1 is fixedly connected to a first sealing plate 25, the top of the first sealing plate 25 is flush with the top of the conveyor belt 3, and the first sealing plate 25 seals the middle position of the conveyor belt 3, the bottom of the opening and closing door 23 contacts the conveyor belt 3 and the top of the first sealing plate 25, and a second motor 26 is fixedly connected to the side wall of the fixed bracket 2, and the output of the second motor 26 The end is fixedly connected to one of the first rotating shafts 24; during operation, since it is necessary to keep the items sealed during spraying to prevent powder from flying out, the middle, bottom and side positions of the conveyor belt 3 are first sealed by using the first sealing plate 25, and the upper part of the conveyor belt 3 is sealed by using the opening and closing door 23, so as to achieve complete sealing. When opening and closing is required, the second motor 26 is started to drive the first rotating shaft 24 and the opening and closing door 23 to rotate toward the inside of the fixed bracket 2, and the left and right sides of the fixed bracket 2 are opened to realize the transportation of the products to be sprayed, meeting the needs of the coating line.

[0035] As a further solution of the present invention, the switching mechanism includes a first gear 27, the first gear 27 is connected to the first rotating shaft 24 on the rear side through a one-way bearing 28, the bottom of the mounting base 1 is rotatably connected to a first rotating rod 29, the outer surface of the first rotating rod 29 is fixedly connected to a second gear 30, the second gear 30 and the first gear 27 are connected by a first tooth chain 31, the bottom of the mounting base 1 is rotatably connected to a second rotating rod 32, the outer surfaces of the second rotating rod 32 and the first rotating rod 29 are fixedly connected to a third gear 33, the two third gears 33 are connected by a second tooth chain 34, the front end of the second rotating rod 32 is fixedly connected to a worm 35, and the recycling drum A turbine 36 is fixedly connected to the outer surface of the outer end rotating shaft of 19, and the turbine 36 is meshed with the worm 35; during operation, since it is necessary to switch and drive the recovery drum 19 to rotate each time the opening and closing door 23 is opened and closed, when the opening and closing door 23 is closed, the first rotating shaft 24 rotates, and drives the first gear 27 to rotate through the one-way bearing 28, and the first gear 27 drives the bottom second gear 30 to rotate through the first tooth chain 31, and then drives the second rotating rod 32 and the worm 35 to rotate through the second rotating rod 32 and the two third gears 33, thereby driving the turbine 36 and the recovery drum 19 to rotate, switching the collection trough at the top of the recovery drum 19, which is beneficial to the collection of powder.

[0036] As a further solution of the present invention, a plurality of U-shaped mounting plates 37 in a linear array are fixedly connected to the bottom of the cover plate 4, and a plurality of blowing blades 38 are rotatably connected to the middle position of the bottom of each U-shaped mounting plate 37, and the blowing blades 38 are used to blow the powder on the top of the conveyor belt 3; during operation, since each time the conveyor belt 3 drives the product to be painted, part of the powder may fall on the top of the conveyor belt 3 and be driven and transported out by the conveyor belt 3, which is not conducive to complete recovery of the powder. After each spraying is completed, a plurality of blowing blades 38 are started, and the blowing blades 38 blow air at the conveyor belt 3 from above, thereby blowing the powder that may stay on the top of the conveyor belt 3 down or fly, and then it is recovered by using the first recovery mechanism and the second recovery mechanism, so that the powder collection is more thorough.

[0037] As a further solution of the present invention, the conveyor belt 3 is a mesh conveyor belt 3, which is used to allow the powder falling on it to fall down; when working, the conveyor belt 3 is set to a mesh type. During spraying, the excess powder falls directly and can be better collected through the conveyor belt 3, and the powder on the top of the conveyor belt 3 can be better recovered.

Claims

1. An automatic powder collecting device for a coating line, comprising a mounting base (1), characterized in that: The top of the mounting base (1) is fixedly connected to a fixed bracket (2), the fixed bracket (2) is in a tetrahedral shape, the mounting base (1) is fixedly connected to a conveyor belt (3) for conveying materials, the left and right sides of the fixed bracket (2) are connected to an opening and closing mechanism for cooperating with a conveying mechanism to seal the left and right sides of the fixed bracket (2), the top of the fixed bracket (2) is fixedly connected to a cover plate (4), the front and rear sides of the fixed bracket (2) are connected to a first recovery mechanism for sealing the front and rear sides of the fixed bracket (2) and recovering powder floating in the air, the top of the mounting base (1) is provided with a collecting port, and a second recovery mechanism for collectively recovering the powder recovered by the first recovery mechanism and the powder directly falling is provided below the collecting port; The first recovery mechanism comprises a filter cloth (5), the filter cloth (5) is fixedly connected to the side wall of the fixed bracket (2), and the filter cloth (5) completely covers the side of the fixed bracket (2), and a plurality of first connecting pipes (6) arranged up and down are fixedly connected to the outer wall of the fixed bracket (2), the outlet of the first connecting pipe (6) is in contact with the outer wall of the filter cloth (5), and the left ends of the plurality of first connecting pipes (6) are fixedly connected to the second connecting pipe (7), and the second connecting pipe (7) is fixedly connected to the suction machine (8), the suction machine (8) is fixedly connected to the top of the mounting base plate (1), the top of the cover plate (4) is fixedly connected to a plurality of one-way air intake valves (9) that can only intake air inwards, the inner side wall of the fixed bracket (2) is fixedly connected to an inclined guide plate (10), the outer end of the guide plate (10) contacts the inner side wall of the filter cloth (5), and the guide plate (10) is used to guide the powder to the collection port, and the inner side of the filter cloth (5) is provided with a scraping mechanism for scraping and discharging the powder adhering to the surface of the filter cloth (5); The scraping mechanism comprises a scraping plate (11), the scraping plate (11) is slidably connected to the inner side wall of the fixed bracket (2), the scraping plate (11) contacts the inner side wall of the filter cloth (5), the bottom of the scraping plate (11) is fixedly connected to a first pull rope (12), the bottom of the mounting base (1) is rotatably connected to a first winding drum (13) and a second winding drum (14), the bottom end of the first pull rope (12) passes through the mounting base (1) and is wound around the first winding drum (13), and a guide bracket (15) is fixedly connected to the side wall of the fixed bracket (2). The top of the scraper plate (11) is fixedly connected to a second pull rope (16), the outer end of the second pull rope (16) passes through the fixed bracket (2), passes around the guide bracket (15) and is finally wound around the outer surface of the second winding drum (14), the outer surfaces of the rotating shafts of the first winding drum (13) and the second winding drum (14) are fixedly connected to a synchronous gear (17), the two synchronous gears (17) are meshed with each other, the outer end of the first winding drum (13) is fixedly connected to a first motor (18), and the first motor (18) is fixedly connected to the bottom of the mounting base plate (1); The second recovery mechanism comprises a recovery drum (19), the recovery drum (19) being rotatably connected to the bottom of the mounting base plate (1), a plurality of recovery grooves (20) arranged in a circumferential array being provided inside the recovery drum (19), the recovery grooves (20) being located below the collection port, a collection shell (21) being sleeved on the outside of the recovery drum (19), the collection shell (21) being fixedly connected to the bottom of the mounting base plate (1), the bottom of the collection shell (21) being fixedly connected to an outlet groove (22), and a switching mechanism for driving the recovery drum (19) to rotate and switch the recovery grooves (20) each time the opening and closing mechanism is sealed.

2. The automatic powder collecting device for a coating line according to claim 1, characterized in that: The opening and closing mechanism comprises an opening and closing door (23), the front and rear ends of the top of the opening and closing door (23) are rotatably connected to the side wall of the fixed bracket (2) through a first rotating shaft (24), the top of the mounting base plate (1) is fixedly connected to a first sealing plate (25), the top of the first sealing plate (25) is flush with the top of the conveyor belt (3), and the first sealing plate (25) seals the middle position of the conveyor belt (3), the bottom of the opening and closing door (23) contacts the conveyor belt (3) and the top of the first sealing plate (25), and a second motor (26) is fixedly connected to the side wall of the fixed bracket (2), and the output end of the second motor (26) is fixedly connected to one of the first rotating shafts (24).

3. The automatic powder collecting device for a coating line according to claim 2, characterized in that: The switching mechanism comprises a first gear (27), the first gear (27) being connected to the first rotating shaft (24) at the rear side through a one-way bearing (28), a first rotating rod (29) being rotatably connected to the bottom of the mounting base (1), a second gear (30) being fixedly connected to the outer surface of the first rotating rod (29), the second gear (30) and the first gear (27) being transmission-connected through a first tooth chain (31), a second rotating rod (32) being rotatably connected to the bottom of the mounting base (1), a third gear (33) being fixedly connected to the outer surfaces of the second rotating rod (32) and the first rotating rod (29), the two third gears (33) being transmission-connected through a second tooth chain (34), a worm (35) being fixedly connected to the front end of the second rotating rod (32), a turbine (36) being fixedly connected to the outer surface of the rotating shaft at the outer end of the recovery drum (19), the turbine (36) being meshed with the worm (35).

4. The automatic powder collecting device for a coating line according to claim 1, characterized in that: The bottom of the cover plate (4) is fixedly connected to a plurality of U-shaped mounting plates (37) in a linear array, and the middle position of the bottom of each U-shaped mounting plate (37) is rotatably connected to a plurality of blowing blades (38), and the blowing blades (38) are used to blow the powder on the top of the conveyor belt (3).

5. The automatic powder collecting device for a coating line according to claim 1, characterized in that: The conveyor belt (3) is a mesh conveyor belt (3), and the conveyor belt (3) is used to make the powder material falling on it fall down.

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