Powder coating fluidized bed drying and screening integrated device of double coating process

Abstract

This invention discloses an integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process. It includes a vibrating chamber and an upper chamber. The vibrating chamber houses an inclined conveyor frame, which contains a conveying and sieving mechanism composed of a sieve plate and a guide plate. A gap exists between the conveyor frame and the conveying and sieving mechanism, and a circulating dispersion frame is located within this gap. A discrete frame is movably mounted on top of the conveyor frame. The circulating dispersion frame includes a set of fixed shafts, with several transmission levers movably mounted between these fixed shafts. Compared to existing technologies, this invention has the advantage of pre-dispersing the material using the discrete frame and separating rollers, combined with the continuous agitation of the bottom powder by the circulating dispersion frame, significantly improving drying uniformity and sieving efficiency. Furthermore, by setting up a monitoring module to dynamically adjust process parameters, it ensures the stability of equipment operation and high efficiency of maintenance, effectively improving the overall quality and automation level of powder coating production.

Description

Technical Field

[0001] This invention relates to the field of drying equipment technology, and in particular to an integrated device for fluidized bed drying and sieving of powder coatings using a dual-coating process. Background Technology

[0002] In the field of powder coating, the two-coat process is widely used in the surface treatment of high-end products due to its excellent coating performance. This process has high requirements for the particle size distribution, cleanliness and flowability of powder coatings. In the production and recycling process of powder coatings, drying and sieving are key steps to ensure powder quality.

[0003] Traditional powder coating processing typically employs separate equipment. The powder first passes through a fluidized bed dryer to remove excess moisture and improve flowability, then undergoes particle size classification using a separate vibrating screen to remove impurities and non-compliant particles. During storage, transportation, or recycling, powder coatings are highly susceptible to forming clumps or agglomerates of varying sizes due to moisture absorption, electrostatic adsorption, or prolonged compression. When these agglomerated powders enter an integrated device, existing equipment lacks a targeted pre-dispersion or agitation mechanism. The agglomerated material directly enters the fluidized bed region, leading to localized material accumulation and preventing uniform fluidization under airflow. The internal structure of the agglomerates... Moisture is difficult to remove effectively in conventional fluidized bed drying processes. On the one hand, the surface of the agglomerates may be dry, while the interior remains at a high moisture content, forming a core-shell structure that is "dry on the outside and wet on the inside." On the other hand, the agglomerates mix with the normal powder in the fluidized bed, resulting in a severely uneven distribution of the moisture content of the material within the bed. This uneven drying state makes it difficult to uniformly match the subsequent drying process parameters. Some materials are over-dried, resulting in dust flying around, while some materials do not meet the drying requirements, leading to a significant decrease in overall drying efficiency and affecting the overall screening efficiency. Therefore, a dual-coating process fluidized bed drying and screening integrated device for powder coatings is proposed. Summary of the Invention

[0004] This invention addresses the problems of uneven drying and unremoved impurities caused by material agglomeration. It provides an integrated device for fluidized bed drying and sieving of powder coatings using a dual-coating process.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an integrated device for fluidized bed drying and sieving of powder coating in a dual-coating process, comprising a vibrating box and an upper box; The vibrating box is equipped with an inclined conveyor frame inside, and the conveyor frame is equipped with a conveying and screening mechanism composed of a screening plate and a guide plate. There is a gap between the conveyor frame and the conveying and screening mechanism, and a circulating dispersion frame is installed inside the gap. A discrete frame is movably installed on the top of the conveyor frame. The circulating dispersion frame includes a set of fixed shafts, with several transmission levers movably arranged between the fixed shafts. The transmission levers are used to circulate and push the material inside the guide plate for separation. By using the dispersion frame and separation rollers to pre-disperse the material, combined with the continuous tumbling of the bottom powder by the circulating dispersion frame, the drying uniformity and sieving efficiency are significantly improved. At the same time, by setting a monitoring module to realize the dynamic adjustment of process parameters, the stability of equipment operation and the efficiency of maintenance are ensured, effectively improving the overall quality and automation level of powder coating production.

[0006] A further preferred embodiment of the present invention is as follows: a set of fixed frames is provided at the bottom of the vibration box, a set of buffer seats is provided at the top of the fixed frames, the vibration box is set on the top of the buffer seats, a set of air inlet pipes are connected to both sides of the vibration box, a retaining plate is provided on the edge of the vibration box, and a vibration motor is installed on the retaining plate, and a dual-channel discharge port is provided on one side of the vibration box. The position of the dual-channel discharge port corresponds to the conveying and splitting mechanism. The material is dried and screened under the action of airflow and vibration, and finally impurities and qualified powder are discharged through the dual-channel discharge port respectively.

[0007] A further preferred embodiment of the present invention is as follows: a set of rectangular grooves are provided on one side wall of the upper box, and a viewing mirror is installed in the rectangular grooves; a set of fixed pipes are connected to the top of the upper box, and a dehumidification pipe is installed on the fixed pipes; a feed pipe is inserted into one side of the upper box; and moisture and a small amount of powder in the drying chamber are extracted by an external air pressure device, and the purified gas is discharged after external recycling treatment to maintain a dry internal environment.

[0008] A further preferred embodiment of the present invention is: a square tube is inserted inside the feed pipe to reduce the material adhering to the inside of the feed pipe during the feeding process, making it easier to replace and clean directly. During operation, the material enters the drying chamber through the square tube, and even if some material adheres, it can be dried in the airflow. It can be directly disassembled and cleaned later, reducing downtime maintenance time.

[0009] A further preferred embodiment of the present invention is as follows: a set of guide end blocks are installed on both the sieve plate and the guide plate. The set of guide end blocks is used to form an angle for material guidance. A monitoring module is provided on the guide end blocks, and the monitoring module is equipped with a light and a camera to provide feedback on the material conveying status, reduce the screening out of residual lumpy and undried material, and provide real-time feedback on the material conveying status. This allows for adjustment of the separation roller speed according to the actual situation, ensuring drying uniformity and processing quality.

[0010] A further preferred embodiment of the present invention is as follows: a set of snap-fit ​​plates are provided at the bottom of the discrete frame, and the snap-fit ​​plates are movably disposed inside the slide groove at the top of the conveyor frame. Transmission snap-fit ​​blocks are movably snapped at both ends of the discrete frame, and docking plates are movably installed on each of the transmission snap-fit ​​blocks. Separation rollers are installed between the docking plates. A drive component is provided inside one side of the transmission snap-fit ​​block to drive a set of docking plates and separation rollers to rotate. Under the drive, the separation rollers press against the top of the sieve plate to squeeze and disperse the material, thereby avoiding the formation of agglomerated materials that would affect the drying efficiency.

[0011] A further preferred embodiment of the present invention is as follows: the separating roller is composed of a set of connecting rods and several fixed screen plates, and several elastic end blocks connecting the fixed screen plates are provided on the outside of the connecting rods. Several reset shafts are provided on the outside of the separating roller. The reset shafts are U-shaped and elastic. The reset shafts are locked onto adjacent fixed screen plates. The top of the discrete frame is equipped with an elastic baffle. The transmission block can move the separating roller to the bottom of the elastic baffle. The elastic baffle at the top of the discrete frame cooperates with the locking turntable to deform the reset shaft during operation, causing the screen plate to extend outward and squeezing and dispersing large pieces of material into uniform particles, which is convenient for subsequent screening.

[0012] A further preferred embodiment of the present invention is as follows: the separating roller is provided with a plurality of grid plates, which are arranged in a uniform array in the annular gap between the connecting rod and the fixed screen plate. The grid plates are uniformly clamped between the gaps of the fixed screen plate for material auxiliary separation. When the separating roller is running, the grid plates collide with the material to assist in separation and shake the powder off onto the screen plate, thereby improving drying and screening efficiency.

[0013] A further preferred embodiment of the present invention is as follows: a fixed shaft is connected to the circulating dispersion rack, a slot is provided on the fixed shaft, and a conveying shaft is connected inside the slot. A conveying pipe is provided inside the conveying shaft, and an air inlet port communicating with the conveying pipe is provided at the top of the conveying shaft. Several exhaust pipes are provided at the bottom of the conveying shaft, and several expansion pipes are provided inside the fixed shaft. The expansion pipes are connected to the bottom of the exhaust pipes. A locking turntable is provided at the top of the conveying shaft, and a reset locking stop is movably provided inside the locking turntable. The locking stop can abut and squeeze against the reset shaft during the movement, which is used to control the intermittent air supply of the exhaust pipes during operation. External air pressure enters the expansion pipes through the conveying shaft. With the cooperation of the reset shaft and the locking turntable, intermittent air supply is achieved, causing the expansion pipes to reciprocate, driving the transmission lever to move, continuously pushing and squeezing the powder, and improving the drying efficiency.

[0014] A further preferred embodiment of the present invention is as follows: a rectangular groove is provided inside the fixed shaft, the top end of the expansion tube is engaged in the rectangular groove, the bottom end of the expansion tube is movably disposed in the rectangular groove, an exhaust hole is provided at the movable end of the expansion tube, a straight rod is provided outside the movable end of the bottom of the expansion tube, the transmission lever is connected between the straight rods, and a limiting baffle is engaged on one side of the rectangular groove, a limiting groove is provided on the edge of the guide plate, the limiting baffle abuts against the inside of the limiting groove, and several arc-shaped grooves are provided on the limiting baffle to control the movable position of the straight rod to drive the transmission lever to swing; The transmission lever is equipped with several reset frames, and the bottom of the reset frame is provided with a mesh ball for material-assisted pushing and crushing. The expansion tube reciprocates under air pressure, driving the transmission lever to swing, turning and crushing the powder accumulated at the bottom, preventing caking and adhesion, and ensuring that the material is dried evenly.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. This invention integrates fluidized bed drying, vibrating screening and material circulation dispersion into one unit. Through the closed space formed by the vibrating box and the upper box, combined with the external airflow, the powder coating is dried and screened simultaneously during the conveying process, which greatly reduces the equipment footprint and intermediate transfer links, and improves production efficiency.

[0016] 2. This invention uses a discrete frame and a separating roller to actively squeeze and disperse the incoming material through their elastic reset structure, effectively breaking up agglomerated materials. Combined with the reciprocating swing of the transmission lever in the circulating dispersion frame and the auxiliary crushing of the grid balls, the bottom powder is continuously turned over, ensuring the uniformity of material heating and drying, and significantly improving the quality of the finished product.

[0017] 3. The present invention is equipped with a monitoring module with lighting and camera on the screening plate and the guide plate, which can provide real-time feedback on the material conveying status and drying effect. The system can dynamically adjust parameters such as the speed of the separating roller according to the feedback data, flexibly adapt to the processing needs of different batches of materials, and ensure the stability and controllability of the production process.

[0018] 4. The present invention adopts a square tube plug structure in the feed pipe, which is convenient for disassembly and replacement. It can quickly clean the dry material adhering to the inner wall, and is easy to disassemble and assemble. It does not require long-term shutdown during maintenance and cleaning, which significantly reduces the impact of equipment maintenance on production continuity.

[0019] 5. This invention utilizes an external pneumatic device to drive airflow for drying, while intermittently triggering the locking turntable during the circular motion of the reset shaft, controlling the expansion tube to achieve intermittent air supply, and driving the transmission lever to automatically swing and turn the material. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the vibration box of the present invention; Figure 3 This is a schematic diagram of the exploded disassembly structure of the vibration box of the present invention; Figure 4 This is a schematic diagram of the discrete frame structure of the present invention; Figure 5 For the present invention Figure 4 A magnified view of the structure at point A in the middle; Figure 6 This is a schematic diagram of a partial cross-sectional view of the discrete frame structure of the present invention; Figure 7 This is a schematic diagram of the exploded disassembly structure of the conveyor frame of the present invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point B in the middle; Figure 9 This is a schematic diagram of the disassembled structure of the sieve plate and the guide plate of the present invention; Figure 10 This is a schematic diagram of the disassembly structure of the circulating dispersion frame of the present invention; Figure 11 For the present invention Figure 10 A magnified schematic diagram of the structure at point C in the middle; Figure 12 This is a partial structural diagram of the transmission scraper of the present invention.

[0022] In the diagram: 1. Vibrating box; 2. Upper box; 3. Conveyor frame; 4. Discrete frame; 5. Circulating dispersion frame; 11. Fixed frame; 12. Dual-channel discharge port; 13. Air inlet pipe; 21. Feed pipe; 22. Dehumidification pipe; 31. Screening plate; 32. Guide plate; 33. Guide end block; 41. Elastic baffle; 42. Transmission block; 43. Connecting plate; 44. Separating roller; 45. Reset shaft; 46. Grid plate; 51. Fixed shaft; 52. Conveyor shaft; 521. Air inlet port; 53. Locking turntable; 54. Limit baffle; 55. Transmission scraper; 56. Reset frame; 561. Grid ball; 57. Expansion pipe. Detailed Implementation

[0023] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0024] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0025] This embodiment mainly describes the title of the integrated fluidized bed drying and sieving device for powder coatings in a dual-coating process. Please refer to [link / reference]. Figures 1-12 Specifically, the device is as follows: a fluidized bed drying and sieving integrated device for powder coating in a dual-coating process, including a vibrating box 1 and an upper box 2; The vibrating box 1 is equipped with an inclined conveyor frame 3. The conveyor frame 3 is equipped with a conveying and screening mechanism consisting of a screening plate 31 and a guide plate 32. There is a gap between the conveyor frame 3 and the conveying and screening mechanism, and a circulating dispersion frame 5 is installed inside the gap. A discrete frame 4 is movably installed on the top of the conveyor frame 3. The circulating dispersion frame 5 includes a set of fixed shafts 51, with several transmission levers 55 movably arranged between the fixed shafts 51. The transmission levers 55 are used to circulate and push the material inside the guide plate 32 for separation. By using the dispersion frame 4 and the separation roller 44 to pre-dispersettle the material, combined with the continuous turning of the bottom powder by the circulating dispersion frame 5, the drying uniformity and sieving efficiency are significantly improved. At the same time, by setting a monitoring module to realize the dynamic adjustment of process parameters, the stability of equipment operation and the efficiency of maintenance are ensured, effectively improving the overall quality and automation level of powder coating production.

[0026] like Figure 1 and Figure 2 As shown, a set of fixed frames 11 is provided at the bottom of the vibrating box 1, and a set of buffer seats is provided at the top of the fixed frames 11. The vibrating box 1 is set on the top of the buffer seats. A set of air inlet pipes 13 are connected to both sides of the vibrating box 1. A clamping plate is provided on the edge of the vibrating box 1, and a vibrating motor is installed on the clamping plate. With the vibrating motor as the driving source, the vibrating box 1 and the upper box 2 at the top are driven to move in conjunction with the fixed frames 11 at the bottom. A double-channel discharge port 12 is provided on one side of the vibrating box 1. The position of the double-channel discharge port 12 corresponds to the conveying and splitting mechanism. During operation, with the help of external air pressure equipment and the air inlet pipes 13, airflow can be formed inside the vibrating box 1 and the upper box 2 for drying the material. The material is conveyed and filtered by the conveying and screening mechanism, and impurities and screened powder are discharged through the double-channel discharge port 12.

[0027] like Figure 1 and Figure 2As shown, a set of rectangular grooves are provided on one side wall of the upper box 2, and a viewing mirror is installed in the rectangular grooves. A set of fixed pipes are connected to the top of the upper box 2, and a dehumidification pipe 22 is installed on the fixed pipes. A feed pipe 21 is inserted into one side of the upper box 2. Combined with external air pressure equipment, excess moisture and a small amount of powder can be discharged along the airflow. With the help of external mechanism recycling, the purified moisture is discharged.

[0028] like Figure 1 and Figure 2 As shown, a square tube is inserted inside the feed pipe 21 to reduce the material adhering to the inside of the feed pipe 21 during the feeding process, making it easy to replace and clean directly. During the operation of the equipment, the material can be poured into the drying chamber composed of the vibrating box 1 and the upper box 2 along the square tube. Some material will adhere to the inner wall of the square tube and dry under the action of airflow. In subsequent maintenance and cleaning, it can be directly disassembled and maintained, reducing the downtime of the equipment for maintenance.

[0029] like Figure 3 , Figure 7 and Figure 9 As shown, a set of guide end blocks 33 are installed on both the screening plate 31 and the guide plate 32. The set of guide end blocks 33 are used to form an angle for material guidance. A monitoring module is set on the guide end blocks 33, and the monitoring module is equipped with a light and a camera to provide feedback on the material conveying status, reduce the screening of uncooked material with lumps inside, and adjust the speed of the separating roller 44 according to the feedback during subsequent use to adjust for different batches of materials, reduce the occurrence of uneven processing quality, and make adjustments according to real-time feedback to ensure the stability of drying.

[0030] like Figure 4 and Figure 5 As shown, a set of snap-fit ​​plates is provided at the bottom of the discrete frame 4, and the snap-fit ​​plates are movably disposed inside the slide groove at the top of the conveyor frame 3. Transmission snap-fit ​​blocks 42 are movably snapped at both ends of the discrete frame 4, and docking discs 43 are movably installed on each transmission snap-fit ​​block 42. Separation rollers 44 are installed between the docking discs 43. A drive component is provided inside one side of the transmission snap-fit ​​block 42 to drive a set of docking discs 43 and separation rollers 44 to rotate. During the material conveying process, the separation rollers 44 can be driven to move by the transmission snap-fit ​​block 42 and pressed against the top of the screen plate 31 to squeeze and separate the incoming material, thereby reducing the low drying efficiency of the clumps of material in the subsequent drying process.

[0031] like Figure 4 , Figure 5 and Figure 6As shown, the separating roller 44 is composed of a set of connecting rods and several fixed screen plates, and several elastic end blocks connecting the fixed screen plates are provided on the outside of the connecting rods. Several reset shafts 45 are provided on the outside of the separating roller 44. The reset shafts 45 are U-shaped and elastic, and the reset shafts 45 are locked on the adjacent fixed screen plates. The top of the discrete frame 4 is equipped with an elastic baffle 41. The transmission block 42 can move the separating roller 44 to the bottom of the elastic baffle 41. As the separating roller 44 moves in a circular motion, the reset shaft 45 can be pressed against the inside of the locking turntable 53. During operation, the reset shaft 45 can be deformed, thereby causing the fixed screen plate to extend outward and clamp larger materials between the fixed screen plate and the connecting rod. During the cyclic activity, it is dispersed into uniformly sized particles, which is convenient for subsequent screening on the screen plate 31. The powder can be screened onto the guide plate 32.

[0032] like Figure 5 and Figure 6 As shown, the separating roller 44 is equipped with several grid plates 46 inside. The grid plates 46 are arranged in a uniform array in the annular gap between the connecting rod and the fixed screen plate. The grid plates 46 are evenly stuck between the gaps of the fixed screen plate for material auxiliary separation. During the operation of the equipment, as the separating roller 44 moves, the internal material can be dried evenly. With the impact between the grid plates 46, the powder can be shaken onto the screening plate 31, which can ensure the drying efficiency of the material and ensure the subsequent continuous screening efficiency.

[0033] like Figure 7 and Figure 8 As shown, a fixed shaft 51 is connected to the circulating dispersion rack 5. A slot is provided on the fixed shaft 51, and a conveyor shaft 52 is connected inside the slot. A conveying pipe is installed inside the conveyor shaft 52. An air inlet port 521 communicating with the conveying pipe is located at the top of the conveyor shaft 52. Several exhaust pipes are opened at the bottom of the conveyor shaft 52. Several expansion pipes 57 are installed inside the fixed shaft 51, and the expansion pipes 57 are connected to the bottom of the exhaust pipes. A locking turntable 53 is located at the top of the conveyor shaft 52. A resetting locking lever is movably installed inside the locking turntable 53, and the locking lever can engage with… During the operation, the reset shaft 45 is pressed against the air supply to control the intermittent air supply of the exhaust pipe. During the operation of the equipment, air is supplied by an external air pressure device and can enter the expansion tube 57 through the conveying pipe inside the conveying shaft 52. During the circumferential movement of the reset shaft 45, it can continuously press the resettable locking stop bar to achieve intermittent air supply. When the air supply decreases, the expansion tube 57 can be reset, thereby driving the straight rod and the transmission lever 55 to move, which can continuously push and press the powder to ensure the overall drying efficiency.

[0034] like Figure 10 , Figure 11 and Figure 12As shown, a rectangular groove is provided inside the fixed shaft 51, the top end of the expansion tube 57 is stuck in the rectangular groove, the bottom of the expansion tube 57 is movably disposed in the rectangular groove, an exhaust hole is opened at the movable end of the expansion tube 57, a straight rod is provided outside the movable end of the bottom of the expansion tube 57, a transmission lever 55 is connected between the straight rods, and a limiting baffle 54 is stuck on one side of the rectangular groove. A limiting groove is provided on the edge of the guide plate 32, the limiting baffle 54 abuts against the inside of the limiting groove, and several arc-shaped grooves are opened on the limiting baffle 54 to control the movable position of the straight rod to drive the transmission lever 55 to swing. Several reset frames 56 are installed on the transmission lever 55. The bottom of the reset frame 56 is provided with a mesh ball 561 for material to be pushed and crushed. Under the action of air pressure, the expansion tube 57 reciprocates, allowing the straight rod to move inside the arc groove, thereby driving the transmission lever 55 to move. This can turn over the powder accumulated at the bottom, ensuring consistent dryness. The mesh ball 561 at the bottom can also assist in crushing and turning the material, reducing the situation where there are lumps of material adhering to the top of the guide plate 32.

[0035] During operation, the material enters the drying chamber composed of the vibrating box 1 and the upper box 2 through the square tube in the feed pipe 21. Driven by the vibrating motor, the vibrating box 1 vibrates with the help of the fixed frame 11 and the buffer seat. At the same time, the external air pressure equipment introduces airflow through the air inlet pipe 13 for drying, while the dehumidification pipe 22 discharges and recycles excess moisture and some powder. The material falls to the dispersion frame 4 at the top of the conveyor frame 3, where the transmission block 42 drives the separation roller 44 to press and disperse it against the screen plate 31. The reset shaft 45 on the separation roller 44 abuts against the locking stop bar in the locking turntable 53 during rotation, causing the fixed screen plate to extend outward and cooperate with the grid plate 46 to disperse the agglomerated material into uniform particles. The powder is then separated. The material falls onto the guide plate 32 through the sieve plate 31. At the same time, the external air supply enters the expansion tube 57 through the air inlet 521 of the conveying shaft 52 inside the fixed shaft 51 of the circulating dispersion frame 5. The intermittent air supply is achieved by the intermittent squeezing of the locking stop bar by the reset shaft 45, which causes the expansion tube 57 to extend and retract and drive the straight rod and the transmission lever 55 to swing. In conjunction with the mesh ball 561 at the bottom of the reset frame 56, the powder on the guide plate 32 is turned over, pushed and assisted in crushing to ensure uniform drying. Finally, the sieved powder and the separated impurities are discharged through the dual-channel discharge port 12. Throughout the process, the monitoring module on the guide end block 33 provides real-time feedback on the material conveying status to adjust the speed of the separating roller 44 and ensure the stability of the drying and sieving quality.

[0036] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this 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. Therefore, they should not be construed as limiting this invention.

[0037] The present invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the present invention and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process, characterized in that, Includes the vibration chamber and the upper chamber; The vibrating box is equipped with an inclined conveyor frame inside, and the conveyor frame is equipped with a conveying and screening mechanism composed of a screening plate and a guide plate. There is a gap between the conveyor frame and the conveying and screening mechanism, and a circulating dispersion frame is installed inside the gap. A discrete frame is movably installed on the top of the conveyor frame. The circulating dispersion frame includes a set of fixed shafts, and several transmission levers are movably arranged between the fixed shafts. The transmission levers are used for the circulating pushing and separation of materials inside the guide plate.

2. The integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process according to claim 1, characterized in that, A set of fixed frames is provided at the bottom of the vibration box, and a set of buffer seats is provided at the top of the fixed frames. The vibration box is located on the top of the buffer seats. A set of air inlet pipes are connected to both sides of the vibration box. A snap-fit ​​plate is provided on the edge of the vibration box, and a vibration motor is installed on the snap-fit ​​plate. A dual-channel discharge port is provided on one side of the vibration box, and the position of the dual-channel discharge port corresponds to the conveying and splitting mechanism.

3. The integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process according to claim 1, characterized in that, A set of rectangular grooves is provided on one side wall of the upper box, and a viewing mirror is installed in the rectangular grooves. A set of fixed pipes is connected to the top of the upper box, and a dehumidifying pipe is installed on the fixed pipes. A feed pipe is inserted into one side of the upper box.

4. The integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process according to claim 3, characterized in that, A square tube is inserted inside the feed pipe to reduce the amount of material adhering to the inside of the feed pipe during the feeding process, making it easier to replace and clean directly.

5. The integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process according to claim 1, characterized in that, Both the screening plate and the guide plate are equipped with a set of guide end blocks. The set of guide end blocks are used to form an angle for material guidance. The guide end blocks are equipped with a monitoring module, and the monitoring module is equipped with a light and a camera to provide feedback on the material conveying status.

6. The integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process according to claim 1, characterized in that, The bottom of the discrete frame is provided with a set of snap-fit ​​plates, which are movably disposed inside the slide groove at the top of the conveyor frame. Transmission blocks are movably snapped at both ends of the discrete frame, and docking plates are movably installed on each transmission block. Separation rollers are installed between the docking plates. A drive component is provided inside one side of the transmission block to drive a set of docking plates and separation rollers to rotate.

7. The integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process according to claim 6, characterized in that, The separating roller consists of a set of connecting rods and several fixed screen plates. Several elastic end blocks connecting the fixed screen plates are provided on the outside of the connecting rods. Several reset shafts are provided on the outside of the separating roller. The reset shafts are U-shaped and elastic. The reset shafts are locked onto adjacent fixed screen plates. An elastic baffle is installed at the top of the discrete frame, and the transmission block can move the separating roller to the bottom of the elastic baffle.

8. The integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process according to claim 6, characterized in that, The separating roller is equipped with several grid plates inside. The grid plates are arranged in a uniform array in the annular gap between the connecting rod and the fixed screen plate. The grid plates are evenly inserted between the gaps of the fixed screen plate for material-assisted separation.

9. The integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process according to claim 1, characterized in that, A fixed shaft is connected to the circulating dispersion frame. A slot is provided on the fixed shaft, and a conveying shaft is connected inside the slot. A conveying pipe is provided inside the conveying shaft. An air inlet port communicating with the conveying pipe is provided at the top of the conveying shaft. Several exhaust pipes are opened at the bottom of the conveying shaft. Several expansion pipes are provided inside the fixed shaft. The expansion pipes are connected to the bottom of the exhaust pipes. A locking turntable is provided at the top of the conveying shaft. A reset locking stop is movably provided inside the locking turntable. The locking stop can abut against and squeeze the reset shaft during the movement, which is used to control the intermittent air supply of the exhaust pipe during operation.

10. The integrated fluidized bed drying and sieving device for powder coatings using a dual-coating process according to claim 9, characterized in that, The fixed shaft has a rectangular groove inside, the top of the expansion tube is locked in the rectangular groove, the bottom of the expansion tube is movably set in the rectangular groove, the movable end of the expansion tube has an exhaust hole, a straight rod is set outside the movable bottom end of the expansion tube, the transmission lever is connected between the straight rods, and a limiting baffle is locked on one side of the rectangular groove. The guide plate has a limiting groove on its edge, the limiting baffle abuts against the inside of the limiting groove, and several arc-shaped grooves are opened on the limiting baffle to control the movable position of the straight rod to drive the transmission lever to swing. The transmission lever is equipped with several reset frames, and the bottom of the reset frame is provided with a mesh ball for assisting in the pushing and crushing of materials.

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