Dust suppression and recovery device for powder coating processing

Abstract

The invention discloses a dust suppression and recovery device for powder coating processing, and belongs to the technical field of dust recovery, the dust suppression and recovery device comprises a recovery pipe, an air suction port, a fan, a dust hopper and a primary recovery mechanism, an air inlet pipe for communication is arranged between the recovery pipe and the air suction port, and the primary recovery mechanism comprises flow guide spirals spirally distributed on the inner side wall of an inlet of the recovery pipe; a circle of dust collecting groove is formed in the inner side wall of the recycling pipe. Firstly, primary separation of large-specific-gravity powder is achieved through guide centrifugation, kinetic energy of an air outlet of a fan is recycled in cooperation with a backflow pipe, dust cleaned by a blockage cleaning shaft is captured through rotation of a conveying belt and rotation of a dust conveying shaft, and meanwhile dust removal is achieved through the gradually-changing curvature design of an arc-shaped groove and the design of dust combing teeth along with rotation of the conveying belt. And the captured dust can be automatically and continuously conveyed, closed and recycled, non-stop full-automatic dust recycling is achieved, and meanwhile automatic blockage clearing is kept in the whole process.

Description

Technical Field

[0001] This invention relates to the field of dust recovery technology, and more specifically, to a dust suppression and recovery device for powder coating processing. Background Technology

[0002] In powder coating processing, dust suppression and recycling are core aspects of ensuring production safety, economic benefits, and environmental impact. Escaped dust can lead to serious raw material losses, directly increasing production costs. At the same time, floating fine dust can be inhaled by operators, causing occupational health hazards such as pneumoconiosis. Furthermore, from the perspective of environmental protection and resource recycling, the efficient recycling and reuse of oversprayed or scattered powders meets the requirements of green manufacturing and sustainable development.

[0003] The main drawback of the existing technology is that its cleaning operation must interrupt the filtration process, and this intermittent operation mode will affect the continuity of production and reduce the overall efficiency. Secondly, centralized pulse cleaning is prone to secondary dust re-entrainment and is difficult to completely remove highly adhesive fine powder, causing deep blockage of the filter cartridge and shortening its service life. Moreover, the system relies on an external high-pressure air source, which consumes a lot of energy and cannot achieve real-time and dynamic dust recovery.

[0004] How to invent a dust suppression and recovery device for powder coating processing to improve these problems has become an urgent issue for those skilled in the art. Summary of the Invention

[0005] To overcome the above deficiencies, the present invention provides a dust suppression and recovery device for powder coating processing, which aims to improve the problems mentioned in the background art.

[0006] This invention is implemented as follows:

[0007] This invention provides a dust suppression and recovery device for powder coating processing, including a recovery pipe, an air inlet, a fan, and a dust hopper. An air inlet pipe is provided between the recovery pipe and the air inlet for communication. It also includes a primary recovery mechanism, including a guide spiral spirally distributed on the inner side wall of the recovery pipe inlet. A dust collection trough is provided on the inner side wall of the recovery pipe. A set of rotating shafts is rotatably connected to the inner side wall of the dust collection trough via a rod. The end of the rotating shaft is connected to a cleaning slider via a connecting rod. A set of sealing blocks is connected to the bottom of the inner side wall of the recovery pipe via a spring. The sealing blocks cooperate with the inlet of the dust hopper.

[0008] The secondary recycling mechanism includes a slip ring rotatably connected to the inside of the recycling pipe. A filter screen is installed on the inner wall of the slip ring. A drive ring is connected to the axis of the slip ring. A linkage shaft and a reference plate are rotatably connected to both ends of the drive ring, respectively. The linkage shaft and the rotating shaft are fitted together in a limiting manner. A set of support rods is connected to the reference plate and slidably connected to the inner wall of the recycling pipe. Gears four and five are connected to the side wall of the reference plate. Gear three, meshing with gear four, is installed on the outer wall of the linkage shaft. A transmission shaft is rotatably connected to the inner side of the linkage shaft. Gear one is connected to one end of the transmission shaft, and gear two, meshing with gear five, is installed at the other end of the transmission shaft. A gear ring meshing with gears four and five is provided on the inner side of the slip ring. The outer wall of the linkage shaft is equipped with a conveying shaft, and the inner side of the conveying shaft is equipped with a gear six that meshes with gear one. The output shaft of gear six is ​​connected to a conveyor belt via a pulley. The outer wall of the conveyor belt is equipped with spaced bristles. The side wall of the slip ring is rotatably connected to a discharge hopper. The side wall of the discharge hopper has an arc-shaped groove that matches the conveyor belt. The conveying shaft is connected to the discharge hopper. The recovery pipe is also equipped with a blockage clearing mechanism and a detection mechanism.

[0009] Preferably, the arc-shaped groove adopts a gradually decreasing arc-shaped wall. Along the rotation direction of the conveyor belt, the radius of curvature of the arc-shaped groove gradually decreases. An opening connected to the discharge hopper is provided at the minimum radius of the arc-shaped groove. The opening is equipped with comb teeth for cleaning and stripping the powder captured by the brush bristles on the outer wall of the conveyor belt.

[0010] Preferably, the inner side of the sealing block is provided with a wedge-shaped guide groove that cooperates with the cleaning slider, the side wall of the cleaning slider is provided with a chamfer, the inside of the discharge hopper is provided with a chamfer, and the discharge hopper is provided with a discharge trough that communicates with the ash hopper.

[0011] Preferably, the unclogging mechanism includes an unclogging shaft disposed on the outer wall of the drive ring, the unclogging shaft being connected to the slip ring, a row of spray holes being opened on the side of the unclogging shaft facing the filter screen, a cleaning shaft being rotatably connected inside the unclogging shaft, multiple sets of brushes for cleaning the filter screen being provided on the outer wall of the cleaning shaft, an exhaust channel being provided at the exhaust port of the blower, a return pipe being connected to the center of the ash hopper, an exhaust pipe being provided in the exhaust channel being provided with an exhaust pipe designed to surround the return pipe, a groove being opened on the side wall of the slip ring, a ring of blades being provided inside the groove, the end of the return pipe away from the blower extending to the top of the recovery pipe and communicating with the blades, an air intake ring communicating with the spray holes being opened on the inner side of the recovery pipe, and an air intake groove connecting the blades and the air intake ring being opened at the bottom of the inner side wall of the recovery pipe.

[0012] Preferably, the end of the return pipe close to the exhaust channel is provided with a set of conical outlets connected to the exhaust channel, and the exhaust pipes are distributed around the exhaust channel.

[0013] Preferably, the detection mechanism includes a hydraulic chamber located inside the recovery pipe, a drain pipe sleeved inside the hydraulic chamber, a spring between the drain pipe and the recovery pipe, and hydraulic oil filling the hydraulic chamber. A rotating ring is rotatably connected to the side wall of the slip ring, and the rotating ring is connected to a piston ring. A connecting groove is formed on the outer side wall of the slip ring. A drain pipe connecting the connecting groove and the hydraulic chamber is formed in the recovery pipe. A fixed shaft is fixedly connected to the inner side wall of the slip ring, and the fixed shaft is sleeved with a cleaning shaft. The connecting groove communicates with the interior of the fixed shaft, and a sliding shaft is sleeved on the inner side of the fixed shaft. The slide shaft has a liquid storage chamber and a compression chamber inside. The compression chamber has an outlet pipe connected to the liquid storage chamber at its axis. A piston block is sleeved on the inner side wall of the compression chamber. The piston block is movably sleeved with the outlet pipe. A spring is installed between the piston block and the compression chamber. The valve block is located between the slide shaft and the drive ring. A spring is installed between the valve block and the inner end of the fixed shaft. The valve block has a flow groove inside that connects the piston block and the side wall. The side wall of the fixed shaft has a flow pipe that cooperates with the flow groove. The brush has a drive assembly inside.

[0014] Preferably, the drive assembly includes a spiral groove formed on the inner sidewall of the cleaning shaft, a set of prismatic rods fixedly connected between the bottom of the fixed shaft and the drive ring, a spiral slider that mates with the spiral groove on the outer sidewall of the prismatic rods, the inside of the reservoir is filled with hydraulic oil, hydraulic oil is filled between the slide shaft and the valve block, one end of the flow pipe faces the sidewall of the valve block, and the other end of the flow pipe faces the spiral slider.

[0015] According to claim 6, a dust suppression and recovery device for powder coating processing is characterized in that the liquid outlet pipe is provided with a one-way valve with the flow direction from the liquid storage chamber toward the sliding shaft and the valve block.

[0016] In summary, the beneficial effects of this invention are:

[0017] 1. First, the gas rotation is guided by a guide spiral, and the ash collection trough achieves primary separation of high-density powder through centrifugation. The return pipe recovers kinetic energy from the fan outlet, driving the blades and drive ring to rotate. The cleaning slider rotates, scraping and collecting the material accumulated on it through the wedge-shaped grooves inside the sealing block. Automatic sealing during discharge prevents backflow. Simultaneously, as the cleaning shaft rotates, a brush cleans the dust adhering to the filter screen surface. Immediately after cleaning, air is blown to disrupt the stable airflow boundary layer on the filter screen surface, reducing the strength and stability of dust re-adhesion. Further, the rotation of the conveyor belt and the ash conveying shaft captures the dust cleaned by the cleaning shaft. Simultaneously, the gradual curvature design of the arc-shaped groove and the comb-tooth design of the conveyor belt automatically and continuously transports and seals the captured dust for recycling. This achieves fully automatic dust recovery without stopping the machine, while maintaining automatic cleaning throughout the process, reducing dust blockage and ensuring stable dust recovery and purification operations. It boasts advantages of low energy consumption and high economic efficiency.

[0018] 2. When the brush becomes clogged due to material fatigue, wear, or microstructural damage leading to a decline in material performance, the reduced filter throughput and increased resistance cause the slip ring to move and pressurize the hydraulic chamber. A metered amount of hydraulic oil stored between the sliding shaft and the valve block is pumped into the area below the valve block via hydraulic transmission. The spiral sliding block and spiral groove design drive the cleaning shaft to rotate at a specified angle, achieving automatic brush replacement. This maintains efficient dynamic cleaning of the filter, enabling automatic detection and replacement of clogs, reducing manual inspection and replacement costs, and ensuring continuous production. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is an external schematic diagram of the recycling tube provided in an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the inside of the recycling tube provided in an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal disassembly of the recycling tube provided in an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the ash hopper provided in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the interior of the sealing block provided in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the drive ring transmission provided in an embodiment of the present invention.

[0026] Figure 7 This is the present invention. Figure 6 Enlarged diagram of point A.

[0027] Figure 8 This is a schematic diagram of the overall ash conveying shaft provided in an embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of the arc-shaped groove provided in an embodiment of the present invention.

[0029] Figure 10 This is a schematic diagram of the overall unblocking shaft provided in an embodiment of the present invention.

[0030] Figure 11 This is a schematic diagram of the internal structure of the unblocking shaft provided in an embodiment of the present invention.

[0031] Figure 12 This is a schematic diagram of the interior of the cleaning shaft provided in an embodiment of the present invention.

[0032] Figure 13 This is a schematic diagram of the internal disassembly of the cleaning shaft provided in an embodiment of the present invention.

[0033] Figure 14 This is the present invention. Figure 13 Enlarged diagram of point B.

[0034] Figure 15 This is the present invention. Figure 13 Enlarged diagram of point C.

[0035] Figure 16 This is a schematic diagram of the interior of the exhaust channel provided in an embodiment of the present invention.

[0036] Legend:

[0037] 100. Recovery pipe; 101. Inlet; 102. Air intake pipe; 103. Fan; 104. Exhaust channel; 105. Return pipe; 106. Exhaust pipe; 107. Guide spiral; 200. Slip ring; 201. Filter screen; 202. Blade; 203. Air intake groove; 204. Air intake ring; 205. Linkage shaft; 206. Gear 1; 207. Drive shaft; 208. Gear 2; 209. Gear 3; 300. Rotary ring; 301. Hydraulic chamber; 302. Drain pipe; 303. Piston ring; 304. Connecting groove; 400. Discharge hopper; 401. Ash hopper; 402. Ash discharge trough; 403. Rotary shaft; 405. Cleaning 406. Ash collection trough; 407. Sealing block; 500. Drive ring; 501. Support rod; 502. Base plate; 503. Gear four; 505. Gear five; 600. Ash conveying shaft; 601. Gear six; 602. Conveyor belt; 603. Arc groove; 604. Ash comb teeth; 700. Unblocking shaft; 701. Spray hole; 702. Brush; 703. Cleaning shaft; 704. Fixed shaft; 705. Spiral groove; 706. Spiral slider; 707. Sliding shaft; 708. Liquid storage chamber; 709. Compression chamber; 710. Piston block; 711. Liquid outlet pipe; 712. Valve block; 713. Flow groove; 714. Flow pipe. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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] Reference Figure 1-16 This invention provides a dust suppression and recovery device for powder coating processing, including a recovery pipe 100, an air intake 101, a fan 103, and a dust hopper 401. An air inlet pipe 102 is provided between the recovery pipe 100 and the air intake 101 for communication. It also includes a primary recovery mechanism, including a guide spiral 107 spirally distributed on the inner side wall of the inlet of the recovery pipe 100. A dust collection trough 406 is provided on the inner side wall of the recovery pipe 100. A set of rotating shafts 403 are rotatably connected to the inner side wall of the dust collection trough 406 by a rod. The end of the rotating shaft 403 is connected to a cleaning slider 405 by a connecting rod. A set of sealing blocks 407 are connected to the bottom of the inner side wall of the recovery pipe 100 by a spring. The sealing blocks 407 cooperate with the inlet of the dust hopper 401.

[0040] The secondary recycling mechanism includes a slip ring 200 rotatably connected to the inner side of the recycling pipe 100. A filter screen 201 is provided on the inner wall of the slip ring 200. A drive ring 500 is connected to the axis of the slip ring 200. A linkage shaft 205 and a reference plate 502 are rotatably connected to both ends of the drive ring 500, respectively. The linkage shaft 205 and the rotating shaft 403 are in a limited movable sleeve connection. The reference plate 502 is connected to a set of support rods 501 slidably connected to the inner wall of the recycling pipe 100. This allows the reference plate 502 to move synchronously with the slip ring 200 along the axis without rotating, thus generating relative rotation with the slip ring 200, which is then transmitted through gears. Gear 505 and gear 403 drive gear 1 206 and linkage shaft 205 to rotate differentially with slip ring 200. Gear 4 503 and gear 505 are connected to the side wall of reference disk 502. Gear 3 209, which meshes with gear 4 503, is provided on the outer side wall of linkage shaft 205. Drive shaft 207 is rotatably connected to the inner side of linkage shaft 205. Gear 1 206 is connected to one end of drive shaft 207, and gear 2 208, which meshes with gear 5 505, is provided at the other end of drive shaft 207. A gear ring that meshes with gear 4 503 and gear 505 is provided on the inner side of slip ring 200. The outer wall of the linkage shaft 205 is provided with a conveying shaft 600, and the inner side of the conveying shaft 600 is provided with a gear 601 that meshes with gear 206. The output shaft of gear 601 is connected to a conveyor belt 602 via a pulley. The outer wall of the conveyor belt 602 is provided with bristles that are spaced apart. The side wall of the slip ring 200 is rotatably connected to a discharge hopper 400. The side wall of the discharge hopper 400 is provided with an arc-shaped groove 603 that matches the conveyor belt 602. The conveying shaft 600 is connected to the discharge hopper 400. The recovery pipe 100 is also provided with a blockage clearing mechanism and a detection mechanism.

[0041] Reference Figure 9 The arc-shaped groove 603 adopts a gradually changing arc-shaped wall. Along the rotation direction of the conveyor belt 602, the radius of curvature of the arc-shaped groove 603 gradually decreases. An opening connected to the discharge hopper 400 is provided at the minimum radius of the arc-shaped groove 603. The opening is provided with comb teeth 604 for cleaning and stripping the powder captured by the brush bristles on the outer side of the conveyor belt 602.

[0042] Furthermore, the inner side of the sealing block 407 is provided with a wedge-shaped guide groove that cooperates with the cleaning slider 405. The side wall of the cleaning slider 405 is provided with a chamfer. When the cleaning slider 405 pushes the sealing block 407 into the recovery pipe 100 through the chamfer, the wedge-shaped guide groove inside the sealing block 407 is connected to the ash hopper 401, so as to discharge the collected powder. After the sealing block 407 is reset under the elastic action of the spring, the wedge-shaped guide groove inside is disconnected from the ash hopper 401, which can prevent the powder material inside the ash hopper 401 from being sucked back. The discharge hopper 400 is provided with a chamfer inside, and the discharge hopper 400 is provided with an ash discharge groove 402 that is connected to the ash hopper 401.

[0043] Reference Figure 3-15 The unclogging mechanism includes an unclogging shaft 700 located on the outer wall of the drive ring 500. The unclogging shaft 700 is connected to the slip ring 200. A row of spray holes 701 is opened on the side of the unclogging shaft 700 facing the filter screen 201. A cleaning shaft 703 is also rotatably connected inside the unclogging shaft 700. Multiple sets of brushes 702 for cleaning the filter screen 201 are provided on the outer wall of the cleaning shaft 703. An exhaust channel 104 is provided at the exhaust port of the blower 103. A return pipe 105 is connected to the center of the ash hopper 401. 104 is also provided with an exhaust pipe 106 designed to surround the return pipe 105. A groove is provided on the side wall of the slip ring 200, and a ring of blades 202 is provided inside the groove. The end of the return pipe 105 away from the fan 103 extends to the top of the recovery pipe 100 and communicates with the blades 202. An air intake ring 204 communicating with the nozzle 701 is provided on the inner side of the recovery pipe 100. An air intake groove 203 connecting the blades 202 and the air intake ring 204 is provided at the bottom of the inner side wall of the recovery pipe 100.

[0044] Furthermore, a set of conical outlets is provided at one end of the return pipe 105 close to the exhaust channel 104 and connected to the exhaust channel 104, and the exhaust pipe 106 is distributed around the exhaust channel 104.

[0045] It should be noted that the detection mechanism includes a hydraulic cavity 301 located inside the recovery pipe 100. A drain pipe 302 is sleeved inside the hydraulic cavity 301, and a spring is installed between the drain pipe 302 and the recovery pipe 100. The hydraulic cavity 301 is filled with hydraulic oil. A rotating ring 300 is rotatably connected to the side wall of the slip ring 200, and the rotating ring 300 is connected to a piston ring 303. A connecting groove 304 is provided on the outer side wall of the slip ring 200. The recovery pipe 100 has a drain pipe 302 that connects the connecting groove 304 and the hydraulic cavity 301. A fixed shaft 704 is fixedly connected to the inner side wall of the slip ring 200, and the fixed shaft 704 is sleeved with a cleaning shaft 703. The connecting groove 304 communicates internally with the fixed shaft 704, and a sliding shaft 703 is sleeved on the inner side of the fixed shaft 704. 07 and valve block 712, the sliding shaft 707 has a liquid storage chamber 708 and a compression chamber 709 inside, the compression chamber 709 has an outlet pipe 711 connected to the liquid storage chamber 708 at its axis, the inner side wall of the compression chamber 709 is fitted with a piston block 710, the piston block 710 is movably fitted with the outlet pipe 711, a spring is provided between the piston block 710 and the compression chamber 709, the valve block 712 is located between the sliding shaft 707 and the drive ring 500, a spring is provided between the valve block 712 and the inner end of the fixed shaft 704, the valve block 712 has a flow groove 713 inside that connects the piston block 710 and the side wall, the side wall of the fixed shaft 704 has a flow pipe 714 that cooperates with the flow groove 713, and the brush 702 has a drive assembly inside.

[0046] Furthermore, the drive assembly includes a spiral groove 705 formed on the inner sidewall of the cleaning shaft 703, a set of prismatic rods fixedly connected between the bottom of the fixed shaft 704 and the drive ring 500, a spiral slider 706 that mates with the spiral groove 705 is provided on the outer sidewall of the prismatic rods, the inside of the liquid storage chamber 708 is filled with hydraulic oil, the space between the sliding shaft 707 and the valve block 712 is filled with hydraulic oil, one end of the flow pipe 714 faces the sidewall of the valve block 712, and the other end of the flow pipe 714 faces the spiral slider 706.

[0047] Furthermore, the outlet pipe 711 is equipped with a one-way valve with the flow direction from the liquid storage chamber 708 toward the slide shaft 707 and the valve block 712.

[0048] The working process of this dust suppression and recovery device for powder coating processing is as follows:

[0049] After the fan 103 starts, a stable downward or sideways airflow is formed through the air intake 101 located close to the ground. This airflow can guide and collect the dust that has escaped from the workshop in an orderly manner, reducing dust emission and improving the dust suppression effect. The collected dust-laden gas enters the recovery pipe 100 through the air inlet pipe 102. First, the gas is guided to rotate by the guide spiral 107. Under the action of centrifugal force, the heavier dust particles can move along the side wall of the recovery pipe 100 and pass through the dust collection trough 406 to directly collect the heavier dust particles. The gas is trapped and captured, achieving primary separation and capture. After primary centrifugal separation, the gas is further filtered by filter screen 201 and discharged through fan 103. During the exhaust process at the outlet of fan 103, the airflow with the greatest kinetic energy pressurizes the inside of return pipe 105 through the conical orifice, causing the outlet airflow to be recycled and returned through return pipe 105. It enters the recovery pipe 100 and drives the slip ring 200 to rotate slowly through blade 202. The drive ring 500 rotates synchronously. Since gear four 503 and gear five 505 are connected by reference plate 502 Limited to rotating only on its own axis and unable to rotate synchronously with the drive ring 500, the drive ring 500, gear five 505, and gear two 208 form a planetary gear set. Simultaneously, the drive ring 500, gear four 503, and gear three 209 also form a planetary gear set. The rotation of gear three 209 causes the linkage shaft 205 to drive the rotating shaft 403 to rotate synchronously. The cleaning slider 405 rotates and collects large particles of dust and impurities accumulated in the ash collection trough 406. When the cleaning slider 405 contacts the sealing block 407, it first... The material accumulated by the cleaning slider 405 is scraped and collected by the wedge-shaped groove inside the sealing block 407. When the sealing block 407 is pushed into the recovery pipe 100 by the chamfered angle of the cleaning slider 405, the wedge-shaped guide groove inside the sealing block 407 is connected to the ash hopper 401, so as to discharge the collected powder. After the sealing block 407 is reset under the elastic action of the spring, the wedge-shaped guide groove inside the sealing block 407 is disconnected from the ash hopper 401, which can prevent the powder material inside the ash hopper 401 from being sucked back, and realize the automatic collection of dust without stopping the machine.

[0050] As the linkage shaft 205 rotates, it drives gear six 601 to accelerate through gear one 206, which in turn drives the conveyor belt 602 to rotate. While the linkage shaft 205 drives the conveyor belt 602 to clean the dust accumulated on the surface of the filter screen 201, the rotation of the conveyor belt 602 allows the bristles spaced on its sidewalls to capture the dust cleaned from the surface of the filter screen 201, causing the dust to rotate synchronously. When the dust carried by the bristles on the surface of the conveyor belt 602 passes through the arc-shaped groove 603, the radius of the arc-shaped groove 603 gradually decreases. When the bristles on the surface of the conveyor belt 602 are about to contact the area of ​​the arc-shaped groove 603, the arc-shaped groove 603 has an opening to allow the bristles on the surface of the conveyor belt 602 to pass through. However, when passing through the area with the smallest radius of the arc groove 603, the brush bristles on the surface of the conveyor belt 602 can capture and clean the attached powder and impurities through the comb teeth 604, allowing them to enter the discharge hopper 400. The angled design inside the discharge hopper 400 guides the material through the ash discharge trough 402 and into the ash hopper 401 for collection. Moreover, the end of the comb teeth 604 is also provided with a barrier section. Through the interval design of the brush bristles, even if the previous section of brush bristles passes through, the interval section is sealed by the abutment of the barrier component. The brush bristles on the surface of the conveyor belt 602 can block the opening area of ​​the arc groove 603, preventing the back suction of material inside the discharge hopper 400, thus achieving the cleaning and conveying and recycling of the material on the surface of the filter screen 201.

[0051] Furthermore, when the drive ring 500 rotates, the brush 702 cleans the pores of the filter screen 201. After the brush 702 has finished cleaning, the nozzle 701 follows closely behind, and the gas accumulated inside the air intake ring 204 blows the cleaned filter screen 201 in the opposite direction through the nozzle 701. After the powder and dust are peeled off by the brush 702, the reverse blowing disturbs the stable airflow boundary layer on the surface of the filter screen 201, reducing the strength and stability of dust re-attachment. When the subsequent conveyor belt 602 rotates and passes by, it can capture, transport and recycle the dust whose stability has been reduced after cleaning.

[0052] Through the combined action of the brush 702 and the conveyor belt 602, the filter screen 201 is less prone to clogging, maintaining its filtration effect. However, after the brush 702 continuously contacts and cleans the filter screen 201, material fatigue, wear, or microstructural damage can occur in the brush 702, leading to a decrease in its elastic modulus. This makes it difficult for the brush 702 to efficiently clean the gaps and pores of the filter screen 201. At this point, the dust removal efficiency on the surface of the filter screen 201 decreases. When clogging occurs on the surface of the filter screen 201, its permeability decreases, resulting in increased resistance to airflow as it passes through the filter screen 201. The airflow pushes the slip ring 200 to compress the hydraulic chamber 301, further increasing the internal pressure of the hydraulic chamber 301. Hydraulic pressure is transmitted through the drain pipe 302 and the connecting groove 304 to the fixed shaft 704, causing the slip shaft 707 to move downwards. Under pressure, the hydraulic oil between the slip shaft 707 and the valve block 712 pushes the piston block 710 into the compression chamber 709, compressing the spring between the piston block 710 and the compression chamber 709 until the slip shaft 707 contacts the valve block 712, causing the valve block 712 to move downwards synchronously. This compresses the spring between the valve block 712 and the inner side of the fixed shaft 704. When the valve block 712 moves down to the opening of the side wall of the flow groove 713 and connects with the flow pipe 714, the piston block 710 returns to its original position under the elastic force of the spring between the piston block 710 and the compression chamber 709. This pumps the hydraulic oil accumulated inside the compression chamber 709 through the flow pipe 714 into the area below the fixed shaft 704, pushing the spiral slider 706 down. The spiral slider 706, with its side wall engaging with the spiral groove 705, drives the cleaning shaft 703 to rotate, automatically replacing the brush 702 on the side wall of the cleaning shaft 703 and restoring its performance. After the brush 702 cleans the filter screen 201, it can alleviate the clogging phenomenon and restore the passability of the filter screen 201. Under the elastic force of the spring between the piston ring 303 and the hydraulic chamber 301, the blade 202 and the piston ring 303 are reset, the internal pressure of the fixed shaft 704 is reduced, and the sliding shaft 707 moves upward, which reduces the pressure between the sliding shaft 707 and the valve block 712. The hydraulic oil stored in the reservoir 708 is filled into the space between the piston block 710 and the valve block 712 through the outlet pipe 711, and the device is reset. The brush 702 can be replaced again when clogging occurs next time.

[0053] It should be noted that during the device reset, as the sliding shaft 707 moves upward, the piston block 710 is restricted to move within the compression chamber 709. Once the hydraulic oil filling the space between the sliding shaft 707 and the valve block 712 reaches a certain level, the piston block 710 cannot continue to move. When the sliding shaft 707 continues to rise, it will drive the valve block 712 to move upward synchronously, stretching the spring between the valve block 712 and the fixed shaft 704. When blocked, the internal pressure of the fixed shaft 704 increases. The total amount of hydraulic oil pumped into the flow pipe 714 by the sliding shaft 707 is also equal to the internal volume of the compression chamber 709. Therefore, the amount of hydraulic oil stored between the compression chamber 709 and the valve block 712 and the amount of hydraulic oil pumped out under pressure are fixed each time the device is reset. Thus, the distance that the spiral slider 706 moves each time, i.e., the angle of rotation of the cleaning shaft 703, remains consistent, ensuring that the cleaning shaft 703 can rotate so that the brush 702 faces the filter screen 201 each time it rotates.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A dust suppression and recovery device for powder coating processing, comprising a recovery pipe (100), an air intake (101), a fan (103), and a dust hopper (401), wherein an air inlet pipe (102) for communication is provided between the recovery pipe (100) and the air intake (101), characterized in that, Also includes: The primary recycling mechanism includes a guide spiral (107) spirally distributed on the inner wall of the inlet of the recycling pipe (100). The inner wall of the recycling pipe (100) is provided with a ring of ash collection trough (406). The inner wall of the ash collection trough (406) is rotatably connected to a set of rotating shafts (403) by a rod. The end of the rotating shaft (403) is connected to a cleaning slider (405) by a connecting rod. The bottom of the inner wall of the recycling pipe (100) is connected to a set of sealing blocks (407) by a spring. The sealing blocks (407) cooperate with the inlet of the ash hopper (401). The secondary recycling mechanism includes a slip ring (200) rotatably connected to the inside of the recycling pipe (100). A filter screen (201) is provided on the inner wall of the slip ring (200). A drive ring (500) is connected to the axis of the slip ring (200). A linkage shaft (205) and a reference disk (502) are rotatably connected to both ends of the drive ring (500). The linkage shaft (205) and the rotating shaft (403) are in a limited movable connection. The reference disk (502) A set of support rods (501) are connected to the inner wall of the recovery pipe (100). The side wall of the reference plate (502) is connected to gear four (503) and gear five (505). The outer wall of the linkage shaft (205) is provided with gear three (209) that meshes with gear four (503). The inner side of the linkage shaft (205) is rotatably connected to a transmission shaft (207). One end of the transmission shaft (207) is connected to gear one (206). The other end of the drive shaft (207) is provided with a gear two (208) that meshes with gear five (505). The inner side of the slip ring (200) is provided with a gear ring that meshes with gear four (503) and gear five (505). The outer wall of the linkage shaft (205) is provided with a ash conveying shaft (600). The inner side of the ash conveying shaft (600) is provided with a gear six (601) that meshes with gear one (206). The output shaft of gear six (601) A conveyor belt (602) is connected via a pulley drive. The outer wall of the conveyor belt (602) is provided with bristles distributed at intervals. The side wall of the slip ring (200) is rotatably connected to a discharge hopper (400). The side wall of the discharge hopper (400) is provided with an arc-shaped groove (603) that matches the conveyor belt (602). The ash conveying shaft (600) is connected to the discharge hopper (400). The recovery pipe (100) is also provided with a blockage clearing mechanism and a detection mechanism.

2. The dust suppression and recovery device for powder coating processing according to claim 1, characterized in that, The arc-shaped groove (603) adopts a gradually changing arc-shaped wall. Along the rotation direction of the conveyor belt (602), the radius of curvature of the arc-shaped groove (603) gradually decreases. An opening connected to the discharge hopper (400) is provided at the minimum radius of the arc-shaped groove (603). The opening is provided with comb teeth (604) for cleaning and stripping the powder captured by the brush bristles on the outer wall of the conveyor belt (602) as it passes.

3. The dust suppression and recovery device for powder coating processing according to claim 1, characterized in that, The inner side of the sealing block (407) is provided with a wedge-shaped guide groove that cooperates with the cleaning slider (405). The side wall of the cleaning slider (405) is provided with a chamfer. The inside of the discharge hopper (400) is provided with a chamfer, and the discharge hopper (400) is provided with a discharge trough (402) that communicates with the ash hopper (401).

4. The dust suppression and recovery device for powder coating processing according to claim 1, characterized in that, The unclogging mechanism includes an unclogging shaft (700) disposed on the outer wall of the drive ring (500), the unclogging shaft (700) being connected to the slip ring (200), and a row of spray holes (701) being opened on the side of the unclogging shaft (700) facing the filter screen (201). A cleaning shaft (703) is also rotatably connected inside the unclogging shaft (700), and multiple sets of brushes (702) for cleaning the filter screen (201) are provided on the outer wall of the cleaning shaft (703). An exhaust channel (104) is provided at the exhaust port of the blower (103), and a return pipe (105) is connected to the center of the ash hopper (401). The air passage (104) is also provided with an exhaust pipe (106) designed to surround the return pipe (105). The side wall of the slip ring (200) has a groove, and a blade (202) is provided inside the groove. The end of the return pipe (105) away from the fan (103) extends to the top of the recovery pipe (100) and communicates with the blade (202). An air intake ring (204) communicating with the nozzle (701) is provided on the inner side of the recovery pipe (100). An air intake groove (203) connecting the blade (202) and the air intake ring (204) is provided at the bottom of the inner side wall of the recovery pipe (100).

5. A dust suppression and recovery device for powder coating processing according to claim 4, characterized in that, The return pipe (105) is provided with a set of conical outlets at one end close to the exhaust channel (104) and is connected to the exhaust channel (104). The exhaust pipe (106) is distributed around the exhaust channel (104).

6. A dust suppression and recovery device for powder coating processing according to claim 4, characterized in that, The detection mechanism includes a hydraulic chamber (301) located inside the recovery pipe (100). A drain pipe (302) is sleeved inside the hydraulic chamber (301). A spring is provided between the drain pipe (302) and the recovery pipe (100). The hydraulic chamber (301) is filled with hydraulic oil. A rotating ring (300) is rotatably connected to the side wall of the slip ring (200). The rotating ring (300) is connected to the piston ring (303). The outer wall of the slip ring (200) is provided with a connecting groove (304), and the recovery pipe (100) is provided with a drain pipe (302) that connects the connecting groove (304) and the hydraulic chamber (301). The inner wall of the slip ring (200) is fixedly connected with a fixed shaft (704), the fixed shaft (704) is sleeved with a cleaning shaft (703), the connecting groove (304) is internally connected to the fixed shaft (704), and a sliding shaft (707) is sleeved on the inner side of the fixed shaft (704). The sliding shaft (707) has a liquid storage chamber (708) and a compression chamber (709) inside the valve block (712). A liquid outlet pipe (711) communicating with the liquid storage chamber (708) is arranged along the axis of the compression chamber (709). A piston block (710) is sleeved on the inner wall of the compression chamber (709). The piston block (710) is movably connected to the liquid outlet pipe (711). A spring is provided between the piston block (710) and the compression chamber (709). The valve block (712) is located between the sliding shaft (707) and the drive ring (500). A spring is provided between the valve block (712) and the inner end of the fixed shaft (704). The valve block (712) has a flow groove (713) that connects the piston block (710) and the side wall. The side wall of the fixed shaft (704) has a flow pipe (714) that cooperates with the flow groove (713). The brush (702) has a drive assembly inside.

7. A dust suppression and recovery device for powder coating processing according to claim 6, characterized in that, The drive assembly includes a spiral groove (705) formed on the inner sidewall of the cleaning shaft (703). A set of prismatic rods is fixedly connected between the bottom of the fixed shaft (704) and the drive ring (500). A spiral slider (706) that cooperates with the spiral groove (705) is provided on the outer sidewall of the prismatic rods. The inside of the liquid storage chamber (708) is filled with hydraulic oil. Hydraulic oil is filled between the sliding shaft (707) and the valve block (712). One end of the flow pipe (714) faces the sidewall of the valve block (712), and the other end of the flow pipe (714) faces the spiral slider (706).

8. A dust suppression and recovery device for powder coating processing according to claim 6, characterized in that, The outlet pipe (711) is equipped with a one-way valve with the flow direction from the liquid storage chamber (708) toward the slide shaft (707) and the valve block (712).

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