Screening device for coating powder processing

Abstract

The utility model relates to the technical field of screening devices, in particular to a screening device for coating powder processing, which comprises a screen drum, a base and a frame, a support arm is fixed at the top end of the base, a suspender is fixed at the other end of the support arm, a pressure spring is fixed at the bottom end of the suspender, and a scraper mounting plate is fixed at the other end of the pressure spring. A scraper supporting plate is movably mounted on the surface of the scraper mounting plate, a scraper is fixed to the bottom end of the scraper supporting plate, and the scraper abuts against the surface of the screen drum; the screening device for coating powder processing has the advantages that the scraping plate is pressed on the surface of the screening drum, when one end of each particle extends out of the corresponding mesh of the screening drum and the other end of each particle is clamped, the particles can be pushed out of the meshes by the scraping plate when moving to be in contact with the scraping plate along with rotation of the screening drum and fall back into the screening drum, and therefore the screening effect is achieved. And the meshes can be prevented from being blocked by particles clamped in the meshes, so that the screening efficiency and effect are prevented from being influenced by the blockage of the meshes.

Description

Technical Field

[0001] This utility model relates to the field of screening devices, specifically a screening device for coating powder processing. Background Technology

[0002] In powder coating processing, sieving is an indispensable and crucial step in the production process. Sieving removes coarse particles, clumps, or impurities from the powder, ensuring that the particle size distribution meets process requirements. Uniform particle size directly affects the coating's spraying effect, leveling, and surface gloss after curing. Therefore, the selection of sieving equipment is critical to both product quality and production efficiency.

[0003] In existing technologies, drum screens are commonly used for processing paint powders. A drum screen typically consists of a screen cylinder, a drive unit, a base, a frame, and a rotating shaft. The base is fixed to the frame, and the drive unit and rotating shaft are mounted on the base. The screen cylinder is fixed to the rotating shaft and is inclined. During sieving, paint powder is fed into the screen cylinder from the higher end. The drive unit rotates the rotating shaft, which in turn rotates the screen cylinder. The powder moves downwards along the inner wall of the screen cylinder as it rotates. During this movement, smaller particles pass through the mesh on the surface of the screen cylinder and fall into the base. From there, they exit through the first outlet at the bottom of the base and fall into a collection container placed at the bottom of the first outlet. Larger particles exit from the lower end of the screen cylinder and fall into a second outlet on the side of the base, then into a collection container placed at the bottom of the second outlet. This completes the sieving of the paint powder. Using a drum screen for paint powder sieving has the advantages of simple structure and low noise, and is suitable for the pretreatment of coarse particles (e.g., particle size > 1 mm).

[0004] However, in the existing technology of using a drum screen for screening coating powder, some irregularly shaped particles will partially protrude from the mesh of the screen cylinder while others cannot pass through, thus getting stuck in the mesh. This will cause blockage of the mesh and reduce screening efficiency and effect. Utility Model Content

[0005] The purpose of this invention is to provide a screening device for coating powder processing to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A sieving device for coating powder processing, comprising: a sieve cylinder, a base, and a frame. The base is fixed to the surface of the frame, a drive device is fixed to the surface of the base, a rotating shaft is rotatably connected to the surface of the base, the sieve cylinder is fixed to the shaft body of the rotating shaft, a key connection is provided between the transmission shaft of the drive device and the rotating shaft, a support arm is fixed to the top of the base, a hanging rod is fixed to the other end of the support arm, a compression spring is fixed to the bottom end of the hanging rod, a scraper mounting plate is fixed to the other end of the compression spring, and a scraper support plate is movably mounted on the surface of the scraper mounting plate.

[0007] A scraper is fixed at the bottom of the scraper support plate, and the scraper rests against the surface of the screen cylinder.

[0008] Preferably, the support arm has an "L"-shaped rod structure, and several sets of support arms are provided.

[0009] Preferably, the scraper support plate has limit grooves on both symmetrical end faces, the scraper mounting plate has an inverted "U" shaped plate structure, and limit rod mounting grooves are provided on both side plates of the scraper mounting plate. The two sets of limit rod mounting grooves are aligned with the two sets of limit grooves respectively. One end of the limit rod is inserted into the limit rod mounting groove, and the other end of the limit rod is movably inserted into the limit groove.

[0010] Preferably, the limiting rod has a rectangular rod structure, and the shapes of the limiting groove and the limiting rod mounting groove are both matched with the limiting rod.

[0011] Preferably, a pull rod is movably inserted into the surface of the scraper mounting plate. The pull rod has a round rod structure, and one end of the pull rod extends into the limiting rod mounting groove and is fixed to the surface of the limiting rod.

[0012] Preferably, a limiting spring is movably sleeved on the rod body that extends into the limiting rod mounting groove. One end of the limiting spring abuts against the surface of the limiting rod, and the other end of the limiting spring abuts against the inner wall of the limiting rod mounting groove.

[0013] Preferably, the other end of the pull rod extends from the surface of the scraper mounting plate and is threaded. A pull block is installed at the end of the pull rod extending from the scraper mounting plate. A screw hole is formed on the surface of the pull block, and the pull rod is screwed into the screw hole.

[0014] Preferably, four sets of guide rods are fixed at the bottom end of the lifting rod, and the four sets of guide rods are respectively set at the two symmetrical ends of the scraper support plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The present invention proposes a sieving device for coating powder processing. A boom is suspended and fixed above a screen cylinder via a support arm. Several sets of compression springs are fixed to the bottom end of the boom. These springs are in a compressed state, exerting a pushing force on the scraper mounting plate at the bottom. The scraper mounting plate, in turn, exerts a pushing force on the scraper support plate and the scraper plate itself, thus pressing the scraper firmly against the surface of the screen cylinder. When a particle extends one end through the mesh of the screen cylinder and is stuck at the other end, it moves with the rotation of the screen cylinder until it contacts the scraper. The scraper then pushes the particle out of the mesh and back into the screen cylinder, preventing particles stuck in the mesh from clogging it and thus avoiding any impact on sieving efficiency and effectiveness. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the present invention.

[0019] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0020] In the diagram: 1. Screen cylinder; 2. Base; 3. Frame; 4. Drive unit; 5. Rotary shaft; 6. Support arm; 7. Hanging rod; 8. Pressure spring; 9. Scraper mounting plate; 10. Scraper support plate; 11. Scraper; 12. Limiting groove; 13. Limiting rod mounting groove; 14. Limiting rod; 15. Limiting spring; 16. Pull rod; 17. Pull block; 18. Screw hole; 19. Guide rod. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Example 1: Please refer to Figures 1-3This utility model provides a technical solution: a sieving device for coating powder processing, comprising: a sieve cylinder 1, a base 2, and a frame 3. The base 2 is fixed on the surface of the frame 3, a drive device 4 is fixed on the surface of the base 2, a rotating shaft 5 is rotatably connected to the surface of the base 2, the sieve cylinder 1 is fixed on the shaft of the rotating shaft 5, and a key connection is provided between the drive shaft of the drive device 4 and the rotating shaft 5. A support arm 6 is fixed at the top of the base 2, a hanging rod 7 is fixed at the other end of the support arm 6, a compression spring 8 is fixed at the bottom of the hanging rod 7, a scraper mounting plate 9 is fixed at the other end of the compression spring 8, a scraper support plate 10 is movably mounted on the surface of the scraper mounting plate 9, a scraper 11 is fixed at the bottom of the scraper support plate 10, and the scraper 11 abuts against the surface of the sieve cylinder 1. The support arm 6 has an "L"-shaped rod structure, and several sets of support arms 6 are provided.

[0023] In actual use, the paint powder is filled into the sieve cylinder 1 from the higher end. The drive device 4 drives the rotating shaft 5 to rotate, which in turn drives the sieve cylinder 1 to rotate. The powder moves downward along the inner wall of the sieve cylinder 1 as it rotates. During this movement, smaller powder particles pass through the mesh on the surface of the sieve cylinder 1 and fall into the base 2. They then exit from the first discharge port at the bottom of the base 2 and fall into a collection container placed at the bottom of the first discharge port. Larger powder particles exit from the lower end of the sieve cylinder 1 and fall into the second discharge port on the side of the base 2. They then fall into a collection container placed at the bottom of the second discharge port. This completes the sieving of the paint powder. The frame 3 elevates the base 2, thus... To provide space for placing containers at the bottom of the base 2; the boom 7 is hoisted and fixed above the screen cylinder 1 via the support arm 6. Several sets of compression springs 8 are fixed at the bottom of the boom 7. The compression springs 8 are in a compressed state, and the compression springs 8 generate a thrust on the scraper mounting plate 9 at the bottom. The scraper mounting plate 9, in turn, generates a thrust on the scraper support plate 10 and the scraper support plate 10, so that the scraper 11 is pressed against the surface of the screen cylinder 1. When one end of a particle extends through the mesh of the screen cylinder 1 and the other end is stuck, these particles move with the rotation of the screen cylinder 1 and when they come into contact with the scraper 11, they will be pushed out of the mesh by the scraper 11 and fall back into the screen cylinder 1. This can prevent particles stuck in the mesh from clogging the mesh, thereby avoiding the impact of mesh clogging on the screening efficiency and effect.

[0024] Example 2: Based on Example 1, in order to support and guide the scraper 11, four sets of guide rods 19 are fixed at the bottom of the hanger 7. The four sets of guide rods 19 are respectively set at the two symmetrical ends of the scraper support plate 10. The scraper support plate 10 is movably installed on the surface of the scraper mounting plate 9, and the scraper 11 is fixed at the bottom of the scraper support plate 10.

[0025] The scraper 11 is made of rubber. To support the scraper 11 and maintain its rectangular shape, a scraper support plate 10 made of metal is fixed to the top of the scraper 11 by means of adhesive or other methods. The scraper support plate 10 has a rectangular structure, which supports the scraper 11. Four sets of guide rods 19 are fixed to the bottom of the hanging rod 7. The four sets of guide rods 19 are separated in pairs and fixed to the symmetrical ends of the scraper support plate 10. Both ends of the scraper support plate 10 abut against the surface of the guide rods 19, which guides the scraper support plate 10 and the scraper 11, so that the scraper support plate 10 and the scraper 11 can only move up and down above the screen cylinder 1.

[0026] Example 3: Based on Example 2, in order to achieve quick replacement of the scraper 11, limit grooves 12 are provided on both symmetrical end faces of the scraper support plate 10. The scraper mounting plate 9 has an inverted "U" shaped plate structure. Limit rod mounting grooves 13 are provided on both side plates of the scraper mounting plate 9. The two sets of limit rod mounting grooves 13 are aligned with the two sets of limit grooves 12 respectively. One end of the limit rod 14 is movably inserted into the limit rod mounting groove 13, and the other end of the limit rod 14 is movably inserted into the limit groove 12. The limit rod 14 has a rectangular rod structure. The shapes of the limit grooves 12 and the limit rod mounting grooves 13 are all matched with the limit rod 14. The scraper mounting plate 9 A pull rod 16 is movably inserted into the surface of the limit rod 14. The pull rod 16 has a round rod structure. One end of the pull rod 16 extends into the limit rod mounting groove 13 and is fixed to the surface of the limit rod 14. A limit spring 15 is movably sleeved on the rod body of the pull rod 16 extending into the limit rod mounting groove 13. One end of the limit spring 15 abuts against the surface of the limit rod 14, and the other end of the limit spring 15 abuts against the inner wall of the limit rod mounting groove 13. The other end of the pull rod 16 extends out from the surface of the scraper mounting plate 9 and is threaded. A pull block 17 is installed at the end of the pull rod 16 extending out of the scraper mounting plate 9. A screw hole 18 is opened on the surface of the pull block 17, and the pull rod 16 is screwed into the screw hole 18.

[0027] During long-term use, the scraper 11 will gradually wear down. When the scraper 11 is worn too badly, pull the two sets of pull blocks 17 in a direction away from each other. The pull blocks 17 will pull the pull rod 16 out further. The pull rod 16 will drive the limit rod 14 out of the limit groove 12 and fully retract into the limit rod mounting groove 13, so that the limit spring 15 is compressed. Then the old scraper support plate 10 and scraper 11 can be removed. Place the new scraper support plate 10 and scraper 11 between the two side plates of the scraper mounting plate 9, so that the two sets of limit grooves 12 are aligned with the two sets of limit rod mounting grooves 13 respectively. Then release the pull blocks 17. Under its own elasticity, the limit spring 15 will push one end of the limit rod 14 back into the limit groove 12 opened on the surface of the new scraper support plate 10, thus completing the replacement of the scraper 11.

[0028] Example 4: Based on Example 3, in order to replace the limit spring 15, the other end of the pull rod 16 extends from the surface of the scraper mounting plate 9 and is threaded. A pull block 17 is installed on the end of the pull rod 16 that extends out of the scraper mounting plate 9. A screw hole 18 is opened on the surface of the pull block 17, and the pull rod 16 is screwed into the screw hole 18.

[0029] When the elasticity of the limit spring 15 decreases during long-term use and can no longer ensure the stable installation of the scraper support plate 10, first remove the scraper support plate 10, then rotate the pull block 17 to make the pull rod 16 screwed into the screw hole 18 exit from the screw hole 18. Then the limit rod 14 can be taken out from the limit rod mounting slot 13. After that, take out the old limit spring 15 and insert the new limit spring 15. After inserting it, reinsert the pull rod 16 and the limit rod 14 into the limit rod mounting slot 13. After the threaded end of the pull rod 16 extends out of the surface of the scraper mounting plate 9 again, reinstall the pull block 17 to the end of the pull rod 16 through the threaded connection between the pull rod 16 and the screw hole 18. This completes the replacement of the limit spring 15.

[0030] In actual use, the paint powder is filled into the sieve cylinder 1 from the higher end. The drive device 4 drives the rotating shaft 5 to rotate, which in turn drives the sieve cylinder 1 to rotate. The powder moves downward along the inner wall of the sieve cylinder 1 as it rotates. During this movement, smaller powder particles pass through the mesh on the surface of the sieve cylinder 1 and fall into the base 2. They then exit from the first discharge port at the bottom of the base 2 and fall into a collection container placed at the bottom of the first discharge port. Larger powder particles exit from the lower end of the sieve cylinder 1 and fall into the second discharge port on the side of the base 2. They then fall into a collection container placed at the bottom of the second discharge port. This completes the sieving of the paint powder. The frame 3 supports the base 2 at a high position. This provides space for placing containers at the bottom of the base 2. The boom 7 is suspended and fixed above the screen cylinder 1 via the support arm 6. Several sets of compression springs 8 are fixed to the bottom of the boom 7. The compression springs 8 are in a compressed state, and they exert a pushing force on the scraper mounting plate 9 at the bottom. The scraper mounting plate 9 then exerts a pushing force on the scraper support plate 10 and the scraper support plate 11, so that the scraper 11 is pressed against the surface of the screen cylinder 1. When a particle extends through the mesh of the screen cylinder 1 at one end and is stuck at the other end, these particles move with the rotation of the screen cylinder 1 and come into contact with the scraper 11. They are then pushed out of the mesh by the scraper 11 and fall back into the screen cylinder 1. This avoids particles stuck in the mesh from clogging the mesh, thus preventing mesh clogging from affecting the efficiency and effect of screening. The scraper 11 is made of rubber. To support the scraper 11 and maintain its rectangular shape, a scraper support plate 10 made of metal is fixed to the top of the scraper 11 by adhesive or other means. The scraper support plate 10 has a rectangular structure, thus supporting the scraper 11. Four sets of guide rods 19 are fixed to the bottom of the suspension rod 7. The four sets of guide rods 19 are separated in pairs and fixed to the symmetrical ends of the scraper support plate 10. Both ends of the scraper support plate 10 abut against the surface of the guide rods 19, thus guiding the scraper support plate 10 and the scraper 11, so that the scraper support plate 10 and the scraper 11 can only move up and down above the screen cylinder 1. During long-term use, the scraper 11 will gradually wear down. When the scraper 11 is worn too badly, pull the two sets of pull blocks 17 in a direction away from each other. The pull blocks 17 pull the pull rod 16 out further. The pull rod 16 drives the limiting rod 14 to exit from the limiting groove 12 and retract completely into the limiting rod mounting groove 13, so that the limiting spring 15 is compressed. Then the old scraper support plate 10 and scraper 11 can be removed. Place the new scraper support plate 10 and scraper 11 between the two side plates of the scraper mounting plate 9, so that the two sets of limiting grooves 12 are aligned with the two sets of limiting rod mounting grooves 13 respectively. Then release the pull blocks 17. Under its own elasticity, the limiting spring 15 pushes one end of the limiting rod 14 back into the limiting groove 12 opened on the surface of the new scraper support plate 10, and the replacement of scraper 11 can be completed.When the elasticity of the limit spring 15 decreases after long-term use and can no longer ensure the stable installation of the scraper support plate 10, first remove the scraper support plate 10, then rotate the pull block 17 to disengage the pull rod 16 screwed into the screw hole 18. Then, remove the limit rod 14 from the limit rod mounting slot 13. Next, remove the old limit spring 15 and insert the new one. After insertion, reinsert the pull rod 16 and limit rod 14 into the limit rod mounting slot 13. Once the threaded end of the pull rod 16 protrudes from the surface of the scraper mounting plate 9, reinstall the pull block 17 onto the end of the pull rod 16 through the threaded connection between the pull rod 16 and the screw hole 18. This completes the replacement of the limit spring 15.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sieving device for coating powder processing, comprising: The machine comprises a screen cylinder (1), a base (2), and a frame (3). The base (2) is fixed on the surface of the frame (3). A drive device (4) is fixed on the surface of the base (2). A rotating shaft (5) is rotatably connected to the surface of the base (2). The screen cylinder (1) is fixed on the shaft of the rotating shaft (5). A key connection is provided between the drive shaft of the drive device (4) and the rotating shaft (5). The machine is characterized in that: a support arm (6) is fixed at the top of the base (2). A hanging rod (7) is fixed at the other end of the support arm (6). A compression spring (8) is fixed at the bottom end of the hanging rod (7). A scraper mounting plate (9) is fixed at the other end of the compression spring (8). A scraper support plate (10) is movably installed on the surface of the scraper mounting plate (9). A scraper (11) is fixed at the bottom end of the scraper support plate (10). The scraper (11) abuts against the surface of the screen cylinder (1).

2. The sieving device for coating powder processing according to claim 1, characterized in that: The support arm (6) has an "L" shaped rod structure, and the support arm (6) is provided in several groups.

3. A sieving device for coating powder processing according to claim 1, characterized in that: The scraper support plate (10) has a limit groove (12) on both symmetrical end faces. The scraper mounting plate (9) has an inverted "U" shaped plate structure. The scraper mounting plate (9) has a limit rod mounting groove (13) on both side plates. The two sets of limit rod mounting grooves (13) are aligned with the two sets of limit grooves (12). One end of the limit rod (14) is inserted into the limit rod mounting groove (13), and the other end of the limit rod (14) is movably inserted into the limit groove (12).

4. A sieving device for coating powder processing according to claim 3, characterized in that: The limiting rod (14) has a rectangular rod structure, and the shapes of the limiting groove (12) and the limiting rod mounting groove (13) are matched with the limiting rod (14).

5. A sieving device for coating powder processing according to claim 3, characterized in that: A pull rod (16) is movably inserted into the surface of the scraper mounting plate (9). The pull rod (16) has a round rod structure, and one end of the pull rod (16) extends into the limiting rod mounting groove (13) and is fixed on the surface of the limiting rod (14).

6. A sieving device for coating powder processing according to claim 5, characterized in that: The pull rod (16) extends into the rod body of the limiting rod mounting groove (13) and is movably fitted with a limiting spring (15). One end of the limiting spring (15) abuts against the surface of the limiting rod (14), and the other end of the limiting spring (15) abuts against the inner wall of the limiting rod mounting groove (13).

7. A sieving device for coating powder processing according to claim 6, characterized in that: The other end of the pull rod (16) extends from the surface of the scraper mounting plate (9) and is threaded. A pull block (17) is installed on one end of the pull rod (16) that extends from the scraper mounting plate (9). A screw hole (18) is opened on the surface of the pull block (17), and the pull rod (16) is screwed into the screw hole (18).

8. A sieving device for coating powder processing according to claim 1, characterized in that: The bottom end of the boom (7) is fixed with four sets of guide rods (19), which are respectively set at the two symmetrical ends of the scraper support plate (10).

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