A screening device for two-component paints

Abstract

The application discloses a kind of screening devices of two-component paint, it is related to paint screening technical field, and its technical solution main points include shell, sleeve and the inner wall of shell are fixedly connected, transmission shaft is rotatably connected in sleeve, one end of transmission shaft is connected with the output end of first motor, sieve disc is set on the other end of transmission shaft, the outside of sieve disc is equipped with blocking ring, and the sieve frame is fixedly connected on blocking ring, and multiple screens are fixedly installed along the radial direction of sieve frame, the mesh number of multiple screens is different, lifting assembly is connected with blocking ring, powder coating is screened using the rotation of sieve disc, and blocking ring is moved by lifting assembly, so that the screen on sieve frame with different mesh number can be surrounded with sieve disc to form different screening particle size screening area, and then powder coating with different particle size is screened, and switching is convenient, and long time shutdown is not needed, the problem that existing need to stop and replace is solved, and efficiency is relatively low.

Description

Technical Field

[0001] This invention relates to the field of coating screening technology, and more specifically, to a screening device for two-component coatings. Background Technology

[0002] Coatings are liquid or solid materials that, when applied to the surface of an object, form a thin film under certain conditions to provide protection, decoration, or other special functions (insulation, rust prevention, mildew prevention, heat resistance, etc.). Early coatings were mostly made from vegetable oils and were therefore called paints. Now, synthetic resins have replaced vegetable oils, hence the name coatings. Coatings belong to organic chemical polymer materials, and the resulting film is a type of polymer compound. According to modern classifications of chemical products, coatings are fine chemical products. Modern coatings are gradually becoming a multifunctional engineering material and an important sector within the chemical industry.

[0003] Two-component coatings are generally made of powder and liquid, which are mixed and stirred in a certain proportion before use. Two-component coatings are now widely used and have better overall performance. In most cases, their adhesion, hardness, and film appearance are better than those of single-component coatings.

[0004] The powder in two-component coatings is powder coating, which is a solid powder synthetic resin coating composed of solid resin, pigments, fillers, and additives. It has the characteristics of no solvent pollution, 100% film formation, and low energy consumption. However, after grinding and processing, powder coatings may have uneven particle size. In order to ensure the quality of powder coatings, they need to be sieved. Most existing methods use sieves for sieving, but sieve sieving is relatively simple. When it is necessary to sieve powder particles of different sizes, the machine needs to be stopped and the corresponding sieve needs to be replaced, which affects the sieving efficiency. Therefore, we propose a sieving device for two-component coatings. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a screening device for two-component coatings.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a screening device for two-component coatings, comprising a shell, a feeding mechanism, a screening mechanism, a collecting mechanism, and a recycling mechanism;

[0007] The lower end of the housing is fixedly connected to multiple support legs;

[0008] The feeding mechanism includes a material box, which is fixedly connected to the shell. The material box's inlet is connected to the outside of the shell, and the material box's outlet is located inside the shell and connected to the screening mechanism.

[0009] The screening mechanism is housed within the casing and is used to screen powder coatings. The screening mechanism includes a sleeve, a drive shaft, a first motor, a screen disc, a blocking ring, a screen frame, a screen mesh, and a lifting assembly. The sleeve is fixedly connected to the inner wall of the casing. A drive shaft is rotatably connected inside the sleeve. One end of the drive shaft is connected to the output end of the first motor, which is mounted on the casing. The other end of the drive shaft has a screen disc for driving the screen disc to rotate. A blocking ring is fitted around the outside of the screen disc, and a fixed... A sieve frame is connected, which fits against the outer wall of a sieve disc, and the sieve disc and sieve frame are rotatably connected. Multiple sieve meshes are fixedly installed on the sieve frame in the vertical direction, one of which, together with the sieve disc, forms a sieve section for sieving powder coatings. The multiple sieve meshes have different mesh sizes and are used to sieve powder coatings of different particle sizes. A lifting assembly is connected to a blocking ring, which is used to adjust the position of the sieve meshes by adjusting the position of the blocking ring, thereby adjusting the sieving particle size of the sieve section formed by the sieve disc.

[0010] The collection mechanism is located inside the housing and is connected to the sieving area through the sieve holes of the sieve. The collection mechanism is used to collect the powder coating separated by the sieve.

[0011] The recycling mechanism is installed on the shell and is used to collect powder coatings that do not conform to the sieve particle size. The recycling mechanism includes an upper ring plate, a lower ring plate, a baffle, an air nozzle, and a recycling pipe. The upper ring plate and the lower ring plate are fixedly connected to the inner wall of the shell. The space between the upper ring plate and the lower ring plate is a recycling chamber. The recycling chamber is provided with a baffle. The recycling chamber is divided into areas on both sides of the baffle. An air nozzle and a recycling pipe are respectively provided on both sides of the baffle. The air outlet of the air nozzle is connected to the recycling chamber, the air inlet of the air nozzle is connected to the air blowing element, the feed inlet of the recycling pipe is connected to the recycling chamber, and the discharge outlet of the recycling pipe is connected to the outside of the shell.

[0012] When the lifting assembly moves the blocking ring to the point where the guide slope at the top of the blocking ring is flush with the screening surface of the screen, the rotation of the screen causes the residual powder coating on the screening surface of the screen to collect into the recovery chamber.

[0013] When the lifting assembly moves the blocking ring to a position where the blocking ring is simultaneously in contact with the upper and lower ring plates, the blocking ring will seal the recovery chamber between the upper and lower ring plates.

[0014] A further technical solution of this application: The feeding mechanism further includes a control component, which is used to control the falling of powder coating in the material box. The control component includes a horizontal shaft, a second motor and a lever. One end of the horizontal shaft is rotatably connected to the discharge port of the material box, and the other end of the horizontal shaft is connected to the output end of the second motor. The second motor is mounted on the housing. Multiple levers are spaced along the circumferential direction on the horizontal shaft. The multiple levers are respectively attached to the side wall of the material box, and the multiple levers divide the discharge port of the material box into two mutually sealed areas.

[0015] A further technical solution of this application: the lifting assembly includes electric push rods, and multiple electric push rods are spaced apart along the circumferential direction of the blocking ring. Each electric push rod is mounted on the housing, and the telescopic end of each electric push rod is fixedly connected to the blocking ring.

[0016] A further technical solution of this application: The collecting mechanism includes a hopper, scrapers and inclined rods. The hopper is located below the blocking ring and is fixedly connected to the housing. The hopper is connected to the screening area through the screen holes of the screen. Multiple scrapers are slidably attached to the inner wall of the hopper. The multiple scrapers are fixedly connected to the drive shaft through the inclined rods.

[0017] A further technical solution of this application: The screening device for the two-component coating further includes a vibration mechanism. The vibration mechanism is installed on the screening mechanism and is used to vibrate the screen disc during the screening process. The vibration mechanism includes a support plate, guide rods, a first spring, a vertical cylinder, a wave disc, rollers, and a vertical plate. The support plate is fixedly connected to the drive shaft. Multiple guide rods are slidably connected to the support plate, and one end of each guide rod is fixedly connected to the screen disc. A first spring is fixedly connected between the screen disc and the support plate. A vertical cylinder is fixedly connected to the end face of the screen disc away from the support plate. A wave disc is fixedly connected to the end face of the vertical cylinder away from the screen disc. The end face of the wave disc has multiple continuously arranged protrusions and concave parts, and the end face of the wave disc rubs against the rollers. The rollers are rotatably connected to the vertical plate, and the vertical plate is fixedly connected to the housing. When the drive shaft drives the wave disc to rotate, the screen disc vibrates under the interaction of the wave disc and the rollers and the action of the first spring.

[0018] A further technical solution of this application: The sieving device for the two-component coating also includes a grinding mechanism. The grinding mechanism is disposed on the housing and is used to further grind the powder coating during the sieving process. Multiple grinding mechanisms are spaced apart along the circumference of the vertical cylinder. The grinding mechanism includes a bushing, a vertical shaft, a driven gear, a driving gear, a crossbar, a grinding block, a protrusion, and a following component. The bushing is disposed on the housing and is slidably connected to the housing. The bushing is also driven to rise and fall synchronously with the sieve disc through the following component. A vertical shaft is rotatably connected to the bushing. A driven gear is fixedly connected to the vertical shaft. The driven gear meshes with the driving gear. The driving gear is fixedly sleeved on the periphery of the vertical cylinder. Multiple crossbars are fixedly connected to the end of the vertical shaft away from the bushing. A grinding block and a protrusion are fixedly connected to the end face of the crossbar near the sieve disc. A gap is left between the grinding block and the sieve disc for grinding the powder coating. The end face of the protrusion is higher than the end face of the grinding block, and the protrusion rubs against the sieve disc.

[0019] A further technical solution of this application: the following component includes a top plate and a second spring, the top plate is fixedly connected to one end of the bushing that extends through the housing to the outside, and the second spring is fixedly connected between the top plate and the housing.

[0020] A further technical solution of this application: an exhaust pipe is fixedly connected to the housing, the exhaust pipe is connected to the screening section, an exhaust fan is fixedly connected to the exhaust pipe, and the exhaust pipe is used to collect dust suspended in the screening section.

[0021] A further technical solution of this application: multiple inclined plates are spaced apart along the circumferential direction on the edge of the end face of the sieve disc. The inclined plates are fixedly installed on the sieve disc. One end of the inclined plate slides against the inner wall of the sieve mesh, and the other end of the inclined plate is inclined away from the center of the sieve disc.

[0022] A further technical solution of this application: the sieve disc is conical, so that the powder coating on the sieve disc screening surface slides down to the edge of the sieve disc.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This invention, by setting up a screening mechanism, allows the screen disc inside the screening mechanism to move the powder coating on it towards the edge during rotation. Powder coating that meets the screening particle size can pass through the screen and fall into the collection mechanism, while powder coating that does not meet the screening particle size is trapped on the screen disc. The lifting component drives the blocking ring to move, so that the screens of different mesh sizes on the screen frame can form screening zones of different screening particle sizes with the screen disc, thereby screening out powder coatings of different particle sizes. The switching is convenient and does not require long-term downtime, effectively improving screening efficiency and solving the problem of low efficiency due to the need for downtime for replacement in existing systems.

[0025] 2. By setting up a recycling mechanism, the residual powder coating on the sieve plate can be collected into the recycling chamber of the recycling mechanism. By blowing air into the recycling chamber through the air nozzle, the airflow can drive the powder coating in the recycling chamber to move along the recycling chamber and finally be discharged through the recycling pipe, thereby recycling the powder coating that does not meet the sieve particle size.

[0026] 3. This invention uses a vibration mechanism to vibrate the sieve disc during the sieving process, thereby preventing powder coating from accumulating on the sieve disc and promoting sieving.

[0027] 4. By setting up a grinding mechanism, the present invention further grinds the powder coating during the sieving process, thereby promoting the sieving of the powder coating and improving the sieving utilization rate of the powder coating. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view of the shell and hopper in an embodiment of the present invention;

[0030] Figure 3 This is a cross-sectional view of the blocking ring in an embodiment of the present invention;

[0031] Figure 4 This is a cross-sectional view of the baffle and the recovery pipe in an embodiment of the present invention;

[0032] Figure 5 This is a cross-sectional view of the material box in an embodiment of the present invention;

[0033] Figure 6 This is a cross-sectional view of the sleeve and the drive shaft in an embodiment of the present invention;

[0034] Figure 7 This is a cross-sectional view of the housing and bushing in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the vertical shaft and the horizontal bar in an embodiment of the present invention;

[0036] Figure 9 This is a cross-sectional view of the sieve disc in an embodiment of the present invention.

[0037] In the diagram: 1. Shell; 2. Support leg; 3. Sleeve; 4. Drive shaft; 5. First motor; 6. Screen plate; 7. Blocking ring; 8. Material box; 9. Upper ring plate; 10. Lower ring plate; 11. Baffle; 12. Air nozzle; 13. Recovery pipe; 14. Screen frame; 15. Screen mesh; 16. Horizontal shaft; 17. Second motor; 18. Pulley; 19. Electric push rod; 20. Hopper; 21. Scraper; 22. Inclined bar; 23. Support plate; 24. Guide rod; 25. First spring; 26. Vertical cylinder; 27. Wave plate; 28. Roller; 29. ​​Vertical plate; 30. Bushing; 31. Vertical shaft; 32. Driven gear; 33. Drive gear; 34. Horizontal bar; 35. Grinding block; 36. Protrusion; 37. Top plate; 38. Second spring; 39. Exhaust pipe; 40. Exhaust fan; 41. Inclined plate. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] Reference Figures 1 to 4 In one embodiment of this application, a sieving device for a two-component coating includes a housing 1, a feeding mechanism, a sieving mechanism, a collecting mechanism, and a recycling mechanism.

[0041] The lower end of the housing 1 is fixedly connected to a plurality of support legs 2;

[0042] The feeding mechanism includes a material box 8, which is fixedly connected to the housing 1. The inlet of the material box 8 is connected to the outside of the housing 1. Powder coating is fed into the material box 8 through the inlet of the material box 8. The outlet of the material box 8 is located inside the housing 1 and is connected to the screening mechanism. The powder coating in the material box 8 falls to the screening mechanism through the outlet.

[0043] The screening mechanism is housed within the casing 1 and is used for screening powder coatings. The screening mechanism includes a sleeve 3, a drive shaft 4, a first motor 5, a sieve disc 6, a blocking ring 7, a sieve frame 14, a sieve screen 15, and a lifting assembly. The sleeve 3 is fixedly connected to the inner wall of the casing 1. The drive shaft 4 is rotatably connected inside the sleeve 3. One end of the drive shaft 4 is connected to the output end of the first motor 5, which is mounted on the casing 1. Figure 2 The output shaft of the first motor 5 can drive the transmission shaft 4 to rotate. A sieve disc 6 is provided on the other end of the transmission shaft 4, and the powder coating in the material box 8 falls onto the sieve disc 6. The transmission shaft 4 is used to drive the sieve disc 6 to rotate. A blocking ring 7 is fitted around the outside of the sieve disc 6, and a sieve frame 14 is fixedly connected to the blocking ring 7. The sieve frame 14 fits against the outer wall of the sieve disc 6, and the sieve disc 6 and the sieve frame 14 are rotatably connected. Multiple screens 15 are fixedly installed on the sieve frame 14 in the vertical direction. One of the screens 15 and the sieve disc 6 form a screening area for screening the powder coating. Figure 2 , Figure 3 During the rotation of the sieve disc 6, the centrifugal force generated can drive the powder coating on it to move towards the edge of the sieve disc 6. Powder coating that meets the particle size of the sieve mesh 15 can pass through the sieve mesh 15 and fall into the collection mechanism, while powder coating that does not meet the particle size of the sieve mesh 15 is retained on the sieve disc 6. The multiple sieve meshes 15 have different mesh sizes and are used to screen powder coatings of different particle sizes. The lifting component is connected to the blocking ring 7. The lifting component is used to adjust the position of the sieve meshes 15 with different mesh sizes by adjusting the position of the blocking ring 7, thereby adjusting the particle size of the screening area enclosed by the sieve disc 6. Figure 2 , Figure 3 The lifting component drives the blocking ring 7 to move, and the blocking ring 7 drives the screen frame 14 to move, so that the screens 15 with different mesh sizes on the screen frame 14 can form different screening zones with the screen plate 6, thereby screening out powder coatings of different particle sizes. The switching is convenient and does not require long-term shutdown, effectively improving screening efficiency and solving the problem of low efficiency due to the need for shutdown to replace the existing screens.

[0044] The mesh count of multiple screens 15 decreases sequentially from top to bottom (the screen 15 at the top has the smallest sieve aperture). When multiple screens 15 are located above the screen plate 6, they can only separate powder coatings of the same particle size.

[0045] The collection mechanism is installed inside the housing 1 and is connected to the sieving area through the sieve holes of the sieve 15. The collection mechanism is used to collect the powder coating separated by the sieve 15.

[0046] The recycling mechanism is installed on the housing 1 and is used to collect powder coatings that do not conform to the sieve particle size. The recycling mechanism includes an upper ring plate 9, a lower ring plate 10, a baffle 11, an air nozzle 12, and a recycling pipe 13. The upper ring plate 9 and the lower ring plate 10 are fixedly connected to the inner wall of the housing 1. The space between the upper ring plate 9 and the lower ring plate 10 is a recycling chamber. The recycling chamber is provided with a baffle 11. The recycling chamber is divided into areas on both sides of the baffle 11. The air nozzle 12 and the recycling pipe 13 are respectively provided on both sides of the baffle 11. The air outlet of the air nozzle 12 is connected to the recycling chamber. The air inlet of the air nozzle 12 is connected to the air blowing component, which supplies air to the air nozzle 12. The air nozzle 12 can blow air into the recycling chamber. The inlet of the recycling pipe 13 is connected to the recycling chamber. The outlet of the recycling pipe 13 is connected to the outside of the housing 1.

[0047] like Figure 2 , Figure 3 After the powder coating that meets the sieving particle size is sieved on the sieve plate 6, the lifting component drives the blocking ring 7 to move until the guide slope at the top of the blocking ring 7 is flush with the sieving surface of the sieve plate 6. The rotation of the sieve plate 6 causes the residual powder coating on the sieving surface of the sieve plate 6 to collect into the recovery chamber.

[0048] When the residual powder coating on the sieve plate 6 collects into the recovery chamber, the lifting assembly moves the blocking ring 7 until it simultaneously contacts the upper ring plate 9 and the lower ring plate 10. At this point, the blocking ring 7 seals the recovery chamber between the upper ring plate 9 and the lower ring plate 10. Figure 4 By blowing air into the recovery chamber through the air nozzle 12, the airflow can drive the powder coating in the recovery chamber to move along the recovery chamber and finally be discharged through the recovery pipe 13, thereby recovering the powder coating that does not meet the sieve particle size.

[0049] Reference Figure 1 and Figure 5 In a preferred embodiment of this application, the feeding mechanism further includes a control component for controlling the falling of powder coating in the material box 8. The control component includes a horizontal shaft 16, a second motor 17, and deflectors 18. One end of the horizontal shaft 16 is rotatably connected to the outlet of the material box 8, and the other end is connected to the output end of the second motor 17. The second motor 17 is mounted on the housing 1, and its output shaft can drive the horizontal shaft 16 to rotate. Multiple deflectors 18 are spaced along the circumferential direction on the horizontal shaft 16, and the horizontal shaft 16 can drive the deflectors 18 to rotate. The multiple deflectors 18 respectively abut against the side wall of the material box 8, and the multiple deflectors 18 divide the outlet of the material box 8 into two mutually sealed areas. Figure 5When the deflector plate 18 is rotating, the powder coating in the material box 8 can fall to the screening mechanism, thereby controlling the falling of the powder coating in the material box 8. After the screening mechanism has finished screening the powder coating of the previous round, the powder coating in the material box 8 will fall again, thus ensuring the orderly screening process.

[0050] Reference Figure 2 In a preferred embodiment of this application, the lifting assembly includes an electric push rod 19. Multiple electric push rods 19 are spaced apart along the circumferential direction of the blocking ring 7. Each electric push rod 19 is mounted on the housing 1, and the telescopic end of each electric push rod 19 is fixedly connected to the blocking ring 7. The blocking ring 7 is lifted and lowered by the electric push rod 19. In practical applications, the blocking ring 7 can also be lifted and lowered by other linear drive components. This embodiment does not limit this.

[0051] Reference Figure 2 and Figure 3 In a preferred embodiment of this application, the collecting mechanism includes a hopper 20, scrapers 21, and inclined rods 22. The hopper 20 is located below the blocking ring 7 and is fixedly connected to the housing 1. The hopper 20 is connected to the sieving area through the sieve holes of the screen 15. Powder coatings that meet the sieve particle size of the screen 15 pass through the screen 15 and fall into the hopper 20. The hopper 20 collects the powder coatings. Multiple scrapers 21 are slidably attached to the inner wall of the hopper 20. The multiple scrapers 21 are fixedly connected to the drive shaft 4 through the inclined rods 22. The drive shaft 4 can drive the scrapers 21 to rotate through the inclined rods 22. The scrapers 21 can scrape the powder coatings off the inner wall of the hopper 20, preventing the powder coatings from adhering to the inner wall of the hopper 20.

[0052] Reference Figure 2 and Figure 6As a preferred embodiment of this application, the sieving device for the two-component coating further includes a vibration mechanism. The vibration mechanism is mounted on the sieving mechanism and is used to vibrate the sieve disc 6 during the sieving process. The vibration mechanism includes a support plate 23, guide rods 24, a first spring 25, a vertical cylinder 26, a wave disc 27, rollers 28, and a vertical plate 29. The support plate 23 is fixedly connected to the drive shaft 4. Multiple guide rods 24 are slidably connected to the support plate 23, and one end of each guide rod 24 is fixedly connected to the sieve disc 6. The drive shaft 4 drives the support plate 23 to rotate, and the support plate 23 drives the sieve disc 6 to rotate via the multiple guide rods 24. The sieve disc 6 and the support plate 23 are fixedly connected. A first spring 25 is fixedly connected to the screen plate 6, which exerts a thrust on the screen plate 6 in a direction away from the support plate 23. A vertical cylinder 26 is fixedly connected to the end face of the screen plate 6 away from the support plate 23. A wave plate 27 is fixedly connected to the end of the vertical cylinder 26 away from the screen plate 6. The end face of the wave plate 27 has multiple continuously arranged protrusions and recesses, and the end face of the wave plate 27 rubs against the roller 28. The roller 28 is rotatably connected to the vertical plate 29, and the vertical plate 29 is fixedly connected to the housing 1. When the drive shaft 4 drives the wave plate 27 to rotate, the screen plate 6 vibrates under the interaction of the wave plate 27 and the roller 28 and the action of the first spring 25.

[0053] During the rotation of the wave plate 27, when the protrusion on the wave plate 27 abuts against the roller 28, the wave plate 27 pushes the screen plate 6 to move towards the support plate 23. When the concave part on the wave plate 27 abuts against the roller 28, the first spring 25 pushes the screen plate 6 to return to its original position. By repeating this process, the screen plate 6 can be driven to vibrate, thereby preventing the powder coating from accumulating on the screen plate 6 and promoting screening.

[0054] Reference Figure 7 and Figure 8As a preferred embodiment of this application, the sieving device for the two-component coating further includes a grinding mechanism. The grinding mechanism is mounted on the housing 1 and is used to further grind the powder coating during the sieving process. Multiple grinding mechanisms are spaced apart along the circumference of the vertical cylinder 26. Each grinding mechanism includes a bushing 30, a vertical shaft 31, a driven gear 32, a driving gear 33, a crossbar 34, a grinding block 35, a protrusion 36, and a following assembly. The bushing 30 is mounted on the housing 1 and slidably connected to it. The bushing 30 is also driven to rise and fall synchronously with the sieve disc 6 via the following assembly. The vertical shaft 31 is rotatably connected to the bushing 30, and the driven gear 32 is fixedly connected to the vertical shaft 31. The driven gear 32 meshes with the driving gear 33, which is fixedly sleeved on the vertical cylinder 26. Around the periphery of 6, the vertical cylinder 26 drives the drive gear 33 to rotate. The drive gear 33 can drive the vertical shaft 31 to rotate through the driven gear 32. The end of the vertical shaft 31 away from the bushing 30 is fixedly connected to multiple crossbars 34. The end face of the crossbars 34 near the screen plate 6 is fixedly connected to grinding blocks 35 and protrusions 36. The vertical shaft 31 can drive the grinding blocks 35 and protrusions 36 to rotate. There is a gap between the grinding blocks 35 and the screen plate 6 for grinding the powder coating. The rotating grinding blocks 35 can grind the powder coating on the screen plate 6, thereby promoting the sieving of the powder coating and improving the sieving utilization rate of the powder coating. The end face of the protrusions 36 is higher than the end face of the grinding blocks 35, and the protrusions 36 rub against the screen plate 6. The protrusions 36 can maintain the grinding gap between the grinding blocks 35 and the screen plate 6.

[0055] In one embodiment, the following component includes a top plate 37 and a second spring 38. The top plate 37 is fixedly connected to one end of the bushing 30 that extends through the housing 1 to the outside. The second spring 38 is fixedly connected between the top plate 37 and the housing 1. The second spring 38 provides a pulling force to the top plate 37 in the direction of approaching the sieve plate 6, thereby causing the bushing 30 to rise and fall synchronously with the sieve plate 6, ensuring the smooth grinding of the grinding block 35.

[0056] Reference Figure 1 and Figure 2 As a preferred embodiment of this application, an exhaust pipe 39 is fixedly connected to the housing 1. The exhaust pipe 39 is connected to the sieve section and an exhaust fan 40 is fixedly connected to the exhaust pipe 39. The exhaust pipe 39 is used to collect dust suspended in the sieve section, thereby collecting suspended powder coatings with the smallest particle size.

[0057] Reference Figure 3In a preferred embodiment of this application, a plurality of inclined plates 41 are spaced apart along the circumferential direction on the edge of the end face of the sieve disc 6. The inclined plates 41 are fixedly installed on the sieve disc 6. One end of the inclined plate 41 slides against the inner wall of the screen 15, and the other end of the inclined plate 41 is inclined away from the center of the sieve disc 6. The sieve disc 6 can drive the inclined plate 41 to rotate. The end of the inclined plate 41 that is in contact with the inner wall of the screen 15 can promote the sieving of powder coating.

[0058] Reference Figure 9 As a preferred embodiment of this application, the sieve disc 6 is conical, so that the powder coating on the sieve disc 6 slides down to the edge of the sieve disc 6, which is more conducive to the sieving of the powder coating.

[0059] It should be noted that all electrical components appearing in this application are connected to an external main controller and 220V AC mains power. The main controller can be a processor, alarm module, or drive module, etc., to control conventional known devices. All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as bolts, rivets, and welding, which are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, and will not be described in detail here.

[0060] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

[0061] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A screening device for a two-component coating, characterized in that, include: The housing (1) has multiple support legs (2) fixedly connected to its lower end; The feeding mechanism includes a material box (8), which is fixedly connected to the shell (1). The inlet of the material box (8) is connected to the outside of the shell (1), and the outlet of the material box (8) is located inside the shell (1) and connected to the screening mechanism. A screening mechanism is installed inside the housing (1) and is used to screen powder coatings. The screening mechanism includes a sleeve (3), a drive shaft (4), a first motor (5), a screen plate (6), a blocking ring (7), a screen frame (14), a screen mesh (15), and a lifting assembly. The sleeve (3) is fixedly connected to the inner wall of the housing (1). The drive shaft (4) is rotatably connected inside the sleeve (3). One end of the drive shaft (4) is connected to the output end of the first motor (5). The first motor (5) is installed on the housing (1). The other end of the drive shaft (4) is provided with a screen plate (6). The drive shaft (4) is used to drive the screen plate (6) to rotate. A blocking ring (7) is sleeved on the outside of the screen plate (6). A sieve frame (14) is fixedly connected to the blocking ring (7). The sieve frame (14) is in contact with the outer wall of the sieve disk (6), and the sieve disk (6) is rotatably connected to the sieve frame (14). Multiple sieves (15) are fixedly installed on the sieve frame (14) in the vertical direction. One of the sieves (15) and the sieve disk (6) form a sieve section for screening powder coatings. The multiple sieves (15) have different mesh sizes, and the multiple sieves (15) are used to screen powder coatings of different particle sizes. The lifting component is connected to the blocking ring (7). The lifting component is used to adjust the position of the sieves (15) with different mesh sizes by adjusting the position of the blocking ring (7), thereby adjusting the screening particle size of the sieve section formed by the sieve disk (6). A collection mechanism is provided inside the housing (1) and communicates with the sieve section through the sieve holes of the sieve (15). The collection mechanism is used to collect the powder coating separated by the sieve (15). as well as The recycling mechanism is installed on the shell (1) and is used to collect powder coatings that do not meet the sieve particle size. The recycling mechanism includes an upper ring plate (9), a lower ring plate (10), a baffle (11), an air nozzle (12), and a recycling pipe (13). The upper ring plate (9) and the lower ring plate (10) are fixedly connected to the inner wall of the shell (1). The space between the upper ring plate (9) and the lower ring plate (10) is a recycling chamber. The recycling chamber is provided with a baffle (11). The recycling chamber is divided into areas on both sides of the baffle (11). The baffle (12) and the recycling pipe (13) are respectively provided on both sides of the baffle (11). The air outlet of the air nozzle (12) is connected to the recycling chamber. The air inlet of the air nozzle (12) is connected to the air blowing element. The feed inlet of the recycling pipe (13) is connected to the recycling chamber. The discharge outlet of the recycling pipe (13) is connected to the outside of the shell (1). When the lifting assembly moves the blocking ring (7) to the point where the guide slope at the top of the blocking ring (7) is flush with the screening surface of the screen plate (6), the residual powder coating on the screening surface of the screen plate (6) is collected into the recovery chamber by the rotation of the screen plate (6); when the lifting assembly moves the blocking ring (7) to the point where the blocking ring (7) is in contact with the upper ring plate (9) and the lower ring plate (10), the blocking ring (7) seals the recovery chamber between the upper ring plate (9) and the lower ring plate (10).

2. The screening device for a two-component coating according to claim 1, characterized in that: The feeding mechanism also includes a control component, which is used to control the falling of powder coating in the material box (8). The control component includes a horizontal shaft (16), a second motor (17), and a lever (18). One end of the horizontal shaft (16) is rotatably connected to the discharge port of the material box (8), and the other end of the horizontal shaft (16) is connected to the output end of the second motor (17). The second motor (17) is mounted on the housing (1). Multiple levers (18) are spaced along the circumferential direction on the horizontal shaft (16). The multiple levers (18) are respectively attached to the side wall of the material box (8), and the multiple levers (18) divide the discharge port of the material box (8) into two mutually sealed areas.

3. The screening device for a two-component coating according to claim 1, characterized in that: The lifting assembly includes an electric push rod (19), and multiple electric push rods (19) are spaced apart along the circumferential direction of the blocking ring (7). Each electric push rod (19) is mounted on the housing (1), and the telescopic end of each electric push rod (19) is fixedly connected to the blocking ring (7).

4. The screening device for a two-component coating according to claim 1, characterized in that: The collecting mechanism includes a hopper (20), scrapers (21) and inclined rods (22). The hopper (20) is located below the blocking ring (7) and is fixedly connected to the housing (1). The hopper (20) is connected to the screening area through the sieve holes of the screen (15). Multiple scrapers (21) are slidably attached to the inner wall of the hopper (20). The multiple scrapers (21) are fixedly connected to the drive shaft (4) through the inclined rods (22).

5. The screening device for a two-component coating according to claim 1, characterized in that: The sieving device for the two-component coating also includes a vibration mechanism, which is installed on the sieving mechanism to vibrate the sieve disc (6) during the sieving process. The vibration mechanism includes a support plate (23), guide rods (24), a first spring (25), a vertical cylinder (26), a wave disc (27), a roller (28), and a vertical plate (29). The support plate (23) is fixedly connected to the drive shaft (4). Multiple guide rods (24) are slidably connected on the support plate (23). One end of each guide rod (24) is fixedly connected to the sieve disc (6). A first spring (25) is fixedly connected between the sieve disc (6) and the support plate (23). 6) A vertical cylinder (26) is fixedly connected to the end face away from the tray (23). A wave plate (27) is fixedly connected to the end of the vertical cylinder (26) away from the screen (6). The end face of the wave plate (27) has a plurality of continuously arranged protrusions and recesses. The end face of the wave plate (27) rubs against the roller (28). The roller (28) is rotatably connected to the vertical plate (29). The vertical plate (29) is fixedly connected to the housing (1). When the drive shaft (4) drives the wave plate (27) to rotate, the screen (6) vibrates under the interaction of the wave plate (27) and the roller (28) and the action of the first spring (25).

6. The screening device for a two-component coating according to claim 5, characterized in that: The sieving device for the two-component coating also includes a grinding mechanism, which is mounted on the housing (1) and used to further grind the powder coating during the sieving process. Multiple grinding mechanisms are spaced apart along the circumference of the vertical cylinder (26). Each grinding mechanism includes a bushing (30), a vertical shaft (31), a driven gear (32), a driving gear (33), a crossbar (34), a grinding block (35), a protrusion (36), and a following assembly. The bushing (30) is mounted on the housing (1) and is slidably connected to the housing (1). The bushing (30) is also driven to rise and fall synchronously with the sieve disc (6) via the following assembly. Rotary connections are made on the bushing (30). There is a vertical shaft (31), on which a driven gear (32) is fixedly connected. The driven gear (32) meshes with a driving gear (33). The driving gear (33) is fixedly sleeved on the periphery of the vertical cylinder (26). A plurality of crossbars (34) are fixedly connected to the end of the vertical shaft (31) away from the bushing (30). A grinding block (35) and a protrusion (36) are fixedly connected to the end face of the crossbar (34) near the sieve disc (6). A gap is left between the grinding block (35) and the sieve disc (6) for grinding powder coating. The end face of the protrusion (36) is higher than the end face of the grinding block (35), and the protrusion (36) rubs against the sieve disc (6).

7. The screening device for a two-component coating according to claim 6, characterized in that: The following assembly includes a top plate (37) and a second spring (38). The top plate (37) is fixedly connected to one end of the bushing (30) that passes through the housing (1) to the outside. The second spring (38) is fixedly connected between the top plate (37) and the housing (1).

8. The screening device for a two-component coating according to claim 1, characterized in that: An exhaust pipe (39) is fixedly connected to the housing (1). The exhaust pipe (39) is connected to the sieve section. An exhaust fan (40) is fixedly connected to the exhaust pipe (39). The exhaust pipe (39) is used to collect dust suspended in the sieve section.

9. The screening device for a two-component coating according to claim 1, characterized in that: Multiple inclined plates (41) are spaced apart along the circumferential direction on the edge of the end face of the sieve plate (6). The inclined plates (41) are fixedly installed on the sieve plate (6). One end of the inclined plate (41) slides against the inner wall of the screen (15), and the other end of the inclined plate (41) is inclined away from the center of the sieve plate (6).

10. A screening device for a two-component coating according to claim 1, characterized in that: The sieve disc (6) is conical, so that the powder coating on the sieve disc (6) slides down to the edge of the sieve disc (6).

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