Iron and impurity removal device for paint waste resource utilization

Abstract

This invention provides a device for removing iron and impurities from paint waste, relating to the field of paint recycling technology. It includes a conveying assembly, two filtering assemblies, and a magnetic suction assembly located between them. The magnetic suction assembly comprises a magnetic suction roller and a scraper mechanism above it. In the scraper mechanism, a piston divides the blade sleeve into a pressure chamber and a receiving chamber, with the blade connected to the piston. The receiving chamber contains a material removal mechanism linked to the lifting and lowering of the blade. A jetting mechanism is connected to the pressure chamber and controls its pressure. During operation, the alternating positive and negative pressure in the pressure chamber drives the blade to lift and lower to scrape the material. Simultaneously, the material removal mechanism automatically scrapes off any clumps of material adhering to the blade surface, and a high-pressure nozzle blows clean the surface of the magnetic suction roller. This device achieves periodic self-cleaning of the scraper, avoiding scraping failure and magnetic roller wear caused by material accumulation. It eliminates the need for frequent shutdowns, has strong continuous operation capabilities, and is particularly suitable for recovering ferromagnetic impurities from highly adhesive paint waste.

Description

Technical Field

[0001] This invention relates to the field of paint recycling technology, and in particular to a device for removing iron and impurities from paint waste for resource recovery. Background Technology

[0002] The production and application of coatings generate a large amount of coating waste, such as waste coatings, coating slag, and sludge from coating wastewater treatment. This waste contains iron filings, rust, welding slag, iron particles from equipment wear, and other non-magnetic impurities. Direct landfilling or incineration not only wastes iron resources but also increases treatment costs and environmental burden. Therefore, resource recycling of coating waste, especially the separation and recovery of its ferromagnetic components, has both economic and environmental benefits.

[0003] Currently, commonly used methods for iron and impurity removal include screening, gravity settling, and magnetic separation. Among these, magnetic separation is widely used due to its high selectivity for ferromagnetic impurities. Existing magnetic separation devices typically employ permanent magnet rollers or electromagnetic rollers. The magnetic rollers adsorb iron filings from the coating, and then scrapers or brushes are used to peel the iron filings off the surface of the magnetic rollers, achieving continuous iron removal.

[0004] However, paint waste often exhibits high adhesiveness and wettability, especially when not adequately dried or crushed. Waste particles easily adhere to the surface of the magnetic roller and the peeling scraper. Traditional scraper mechanisms typically employ fixed blades that adhere closely to the magnetic roller surface, scraping off the adsorbed iron filings. However, due to the strong adhesiveness of components such as resins, solvents, and thickeners in paint waste, the iron filings do not immediately detach after being scraped off. Instead, they tend to adhere to the scraper blade edge, gradually accumulating and hardening as the scraper continues to operate, eventually forming a dense agglomerated layer. This agglomerated layer alters the effective gap between the scraper and the magnetic roller, preventing the scraper from maintaining a tight seal and causing some iron filings to be missed or re-mixed into the material. Furthermore, the presence of this agglomerated layer increases the frictional resistance between the scraper and the magnetic roller, accelerating the wear of the magnetic roller's surface coating. In severe cases, it can even cause the magnetic roller to jam or the drive motor to overload. Operators are forced to frequently stop the machine to clean the adhering material on the scraper, reducing the continuous operation capability of the production line and increasing labor maintenance costs.

[0005] Therefore, how to effectively solve the problem of material adhesion on the scraper surface has become a bottleneck that needs to be overcome in the magnetic separation and iron removal technology for coating waste. Summary of the Invention

[0006] This application provides an iron and impurity removal device for the resource recovery of paint waste, including a conveying assembly for conveying paint, two filter assemblies disposed above the conveying assembly, and a magnetic suction assembly disposed between the two filter assemblies. The magnetic suction assembly includes a top plate, and a connecting frame is fixedly disposed below the top plate. A bearing seat is fixedly disposed on the bottom surface of the connecting frame, and a magnetic suction roller is rotatably disposed inside the bearing seat. A scraper mechanism is correspondingly disposed at the upper center of the magnetic suction roller, and the scraper mechanism is used to scrape off material from the outer surface of the magnetic suction roller. The scraper mechanism includes a blade sleeve fixedly connected to the top plate. Furthermore, a piston is slidably mounted on the inner side of the blade sheath in the vertical direction. A connecting rod is fixedly mounted on the bottom surface of the piston, and a blade corresponding to the magnetic roller is fixedly mounted on the end of the connecting rod away from the piston. The piston divides the inner space of the blade sheath into a pressure chamber and a receiving chamber, and the blade is located in the receiving chamber. A material removal mechanism is provided on the inner side of the receiving chamber, and the material removal mechanism is used to remove the adhesive material on the outer surface of the blade. The magnetic suction assembly also includes an air jet mechanism, and the air jet mechanism is used to blow away the material on the outer surface of the magnetic roller. The air jet mechanism is connected to the pressure chamber and is used to control the pressure in the pressure chamber.

[0007] Preferably, a guide rod is fixedly provided on the inner side of the blade sleeve, and the guide rod is slidably connected to the piston. The guide rod guides the piston to slide, ensuring the smoothness of the piston movement and the precise control of the gap between the scraper and the magnetic roller.

[0008] Preferably, the material removal mechanism includes a fixed plate fixedly connected to the guide rod, and a fixed shaft is fixedly provided on the inner side of the fixed plate. A rotating plate is slidably provided on the outer side of the fixed shaft, and a material removal blade corresponding to the cutting tool is rotatably provided on the end of the rotating plate away from the fixed shaft. The rotatable material removal blade automatically adheres to and scrapes off the clumps of material adhering to its surface when the cutting tool retracts, avoiding manual cleaning.

[0009] Preferably, the inner wall of the blade sleeve is provided with a sliding groove, and a slider is slidably arranged inside the sliding groove. A lifting block is fixedly connected to one side of the slider, and the lifting block is trapezoidal. A connecting rod is fixedly arranged on the top surface of the lifting block, and the end of the connecting rod away from the lifting block is fixedly connected to the bottom surface of the piston. An arc-shaped column is fixedly arranged on the outer side of the rotating plate, and the arc-shaped column cooperates with the lifting block to drive the rotating plate to rotate along a fixed axis. A fixed rod is fixedly arranged on the top surface of the lifting block, and the end of the fixed rod away from the lifting block is fixedly connected to the piston. The cooperation between the trapezoidal lifting block and the arc-shaped column converts the linear motion of the piston into the rotational motion of the rotating plate, so that the material removal blade can effectively scrape off the adhering material on the blade.

[0010] Preferably, the jetting mechanism includes an air pump fixedly connected to the top surface of the top plate, and the output end of the air pump is fixedly connected to a connecting pipe. The end of the connecting pipe away from the air pump is fixedly connected to a buffer cylinder, and a high-pressure nozzle corresponding to the magnetic roller is connected to the buffer cylinder. The high-pressure nozzle sprays air to clean the surface of the magnetic roller, further removing residual materials and assisting in drying the surface of the magnetic roller.

[0011] Preferably, the input end of the air pump is fixedly connected to an air intake pipe, and an extension pipe is connected to the air intake pipe. The extension pipe is connected to the air pressure chamber, and an electric valve is installed on the extension pipe. The air pump draws air from the air pressure chamber to generate negative pressure, which drives the piston to rise and disengage the cutter from the magnetic roller, facilitating the operation of the material removal mechanism.

[0012] Preferably, an air supply pipe is fixedly connected to the connecting pipe, and the air supply pipe is connected to the air pressure chamber. An electric valve is installed on the air supply pipe, and the air supply pipe fills the air pressure chamber with compressed air, driving the piston to descend so that the cutter fits tightly against the magnetic roller to ensure the scraping effect.

[0013] Preferably, a coupling is provided on one side of the magnetic roller, and a servo motor is provided at the end of the coupling away from the magnetic roller. The servo motor drives the magnetic roller to rotate through the coupling. A reinforcing rod is fixedly provided on the outside of the servo motor and is fixedly connected to the top plate. The servo motor drives the magnetic roller to rotate smoothly through the coupling, and the connection rigidity is enhanced by the reinforcing rod to ensure that the speed of the magnetic roller is controllable and the operation is stable.

[0014] Preferably, the filter assembly includes a fixed frame fixedly connected to the conveying assembly, and a filter screen is provided on the inner side of the fixed frame. A reinforcing member or a triangular plate is fixedly provided on the outer side of the fixed frame, and the reinforcing member or triangular plate is fixedly connected to the conveying assembly or the top plate respectively. The filter screen pre-filters the paint waste, and the reinforcing member and triangular plate enhance the connection stability between the filter assembly and the conveying assembly and the top plate.

[0015] Preferably, the conveying assembly includes a support frame, which is connected to an external fixed object. A drive wheel is rotatably arranged below the support frame, and a conveyor belt is coupled to the outside of the drive wheel. A drive motor is arranged outside the drive wheel, and the drive motor drives the conveyor belt to move through the drive wheel. The drive motor drives the conveyor belt to move, thereby realizing the continuous and uniform conveying of paint waste and improving the efficiency of iron and impurity removal operations.

[0016] This invention provides an iron and impurity removal device for the resource utilization of paint-type waste, which, compared with the prior art: This waste coating recycling device for removing iron and impurities utilizes a pneumatically driven, lifting scraper mechanism and a material removal mechanism linked to the scraper's lifting motion within the receiving chamber. This achieves automatic removal of adhering materials from the scraper surface. When the pneumatic chamber is under negative pressure, the piston lifts the scraper, disengaging it from the magnetic roller. Simultaneously, a trapezoidal lifting block pushes an arc-shaped column, causing the rotating plate to swing. The scraper forcefully scrapes away the sticky, clump-like material accumulated on the scraper's edge and sides. When the pneumatic chamber returns to positive pressure, the scraper re-adheres to the magnetic roller for scraping. This periodic self-cleaning process effectively avoids scraping failure caused by material adhesion and hardening, magnetic roller wear, and motor overload due to fixed scrapers. It eliminates the need for frequent manual shutdowns for cleaning, improving the production line's continuous operation capability and iron removal stability.

[0017] This iron and impurity removal device for the resource recovery of paint waste utilizes a single air pump to simultaneously achieve three functions: cutter lifting and lowering, air pressure control of the air chamber, and air jet cleaning of the magnetic roller surface. It features a compact structure and low energy consumption. A buffer cylinder ensures stable air pressure from the high-pressure nozzle, effectively blowing away residual microparticles and moisture from the magnetic roller, keeping the roller surface dry and clean, and further improving magnetic attraction efficiency. The entire device is highly automated and reliable in operation, making it particularly suitable for the resource recovery of ferromagnetic impurities from highly adhesive and high-humidity paint waste, offering significant economic and environmental benefits. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device of the present invention; Figure 2 This is a three-dimensional structural diagram of the magnetic suction component of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the scraper mechanism of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 6 This is a three-dimensional structural diagram of the material removal mechanism of the present invention; Figure 7 This is a schematic diagram of the overall front view of the device of the present invention; Figure 8This is a three-dimensional structural diagram of the filter component of the present invention.

[0020] icon: 1. Conveying assembly; 2. Filtering assembly; 3. Magnetic suction assembly; 4. Material removal mechanism; 11. Support frame; 12. Drive wheel; 13. Conveyor belt; 14. Drive motor; 21. Fixing frame; 22. Filter screen; 23. Reinforcing component; 24. Triangular plate; 31. Top plate; 32. Connecting frame; 33. Bearing seat; 34. Magnetic suction roller; 35. Coupling; 36. Servo motor; 37. Reinforcing rod; 38. Air jet mechanism; 39. Scraper mechanism; 41. Fixing plate; 42. Fixing shaft ; 43. Rotating plate; 44. Material removal knife; 45. Arc-shaped column; 46. Lifting block; 47. Sliding block; 48. Fixing rod; 381. Buffer cylinder; 382. High-pressure nozzle; 383. Connecting pipe; 384. Air pump; 385. Extension pipe; 386. Air supply pipe; 387. Suction pipe; 391. Knife sleeve; 392. Piston; 393. Air pressure chamber; 394. Storage chamber; 395. Connecting rod; 396. Knife; 397. Guide rod; 398. Slide groove. Detailed Implementation

[0021] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] Please refer to Figures 1-8 This invention provides an iron and impurity removal device for the resource recovery of paint waste, including a conveying assembly 1 for conveying paint, two filter assemblies 2 disposed above the conveying assembly 1, and a magnetic suction assembly 3 disposed between the two filter assemblies 2. The conveying assembly 1 is used to continuously convey paint waste, the two filter assemblies 2 are respectively located on the left and right sides of the magnetic suction assembly 3 to perform preliminary filtration and uniform distribution of the material, and the magnetic suction assembly 3 is used to adsorb and separate ferromagnetic impurities in the material, thereby realizing the resource recovery and iron removal of the waste.

[0023] The conveying assembly 1 includes a support frame 11, which is fixedly connected to an external fixed object (such as the ground or equipment frame). A drive wheel 12 is rotatably mounted below the support frame 11, and a conveyor belt 13 is coupled to the outer side of the drive wheel 12. A drive motor 14 is mounted on the outer side of the drive wheel 12. The drive motor 14 drives the conveyor belt 13 to move via the drive wheel 12, and material is placed on the upper surface of the conveyor belt 13. The drive motor 14 provides power, and the drive wheel 12 drives the conveyor belt 13 to move at a uniform speed, thereby achieving continuous and uniform conveying of paint-like waste.

[0024] The filter assembly 2 includes a fixed frame 21 fixedly connected to the support 11 of the conveying assembly 1, with a filter screen 22 disposed on the inner side of the fixed frame 21. A reinforcing member 23 or a triangular plate 24 is fixedly disposed on the outer side of the fixed frame 21. The reinforcing member 23 is fixedly connected to the support 11 of the conveying assembly 1, and the triangular plate 24 is fixedly connected to the top plate 31 of the magnetic suction assembly 3, thereby securely installing the filter assembly 2 between the conveying assembly 1 and the magnetic suction assembly 3. The filter screen 22 performs preliminary filtration of paint waste on the conveyor belt 13, intercepting large non-magnetic particles, while simultaneously making the material distribution on the conveyor belt 13 more uniform, reducing the burden on the magnetic suction roller 34, and preventing large particles from entangled or damaging the surface of the magnetic suction roller 34.

[0025] The magnetic suction assembly 3 includes a top plate 31, a connecting frame 32 below the top plate 31, a bearing seat 33 on the bottom surface of the connecting frame 32, and a magnetic suction roller 34 rotatably mounted inside the bearing seat 33. A servo motor 36 is connected to one side of the magnetic suction roller 34 via a coupling 35, and a reinforcing rod 37 is fixedly mounted on the outside of the servo motor 36, and the reinforcing rod 37 is fixedly connected to the top plate 31. The servo motor 36 drives the magnetic suction roller 34 to rotate via the coupling 35. The magnetic suction roller 34 contains a permanent magnet or electromagnet, which can attract ferromagnetic impurities (such as iron filings, welding slag, etc.) from the material passing beneath it. By precisely controlling the speed of the servo motor 36, the interaction time between the magnetic suction roller 34 and the material can be adjusted.

[0026] A scraper mechanism 39 is positioned at the upper center of the magnetic roller 34 to scrape away ferromagnetic materials adsorbed on its outer surface. The scraper mechanism 39 includes a blade sleeve 391 fixedly connected to the top plate 31. A piston 392 is slidably mounted vertically on the inner side of the blade sleeve 391. A connecting rod 395 is fixedly mounted on the bottom surface of the piston 392. A cutter 396, corresponding to the surface of the magnetic roller 34, is fixedly mounted at the end of the connecting rod 395 away from the piston 392. The piston 392 divides the inner space of the blade sleeve 391 into an upper air pressure chamber 393 and a lower receiving chamber 394. The cutter 396 is located within the receiving chamber 394. A guide rod 397 is also fixedly mounted inside the blade sleeve 391, and the guide rod 397 is slidably connected to the piston 392.

[0027] By controlling the pressure changes within the pneumatic chamber 393, the piston 392 drives the cutter 396 to move up and down. When the pneumatic chamber 393 is under positive pressure, the piston 392 descends, and the cutter 396 closely adheres to the surface of the magnetic roller 34, scraping off the adsorbed iron filings; when the pneumatic chamber 393 is under negative pressure, the piston 392 rises, and the cutter 396 retracts into the receiving chamber 394, facilitating the removal of material adhering to the cutter 396 itself.

[0028] The contact and separation of the blade 396 and the magnetic roller 34 can be precisely controlled by air pressure, avoiding the problem of gap changes caused by material accumulation in traditional fixed scrapers. At the same time, the blade 396 can periodically detach from the magnetic roller 34, creating conditions for the operation of the material removal mechanism 4.

[0029] A material removal mechanism 4 is provided inside the receiving cavity 394 to remove material adhering to the outer surface of the blade 396. The material removal mechanism 4 includes a fixed plate 41 fixedly connected to the guide rod 397, and a fixed shaft 42 fixedly installed inside the fixed plate 41. A rotating plate 43 is rotatably connected to the outside of the fixed shaft 42, and the rotating plate 43 can rotate along the fixed shaft 42 within a preset angle range. A material removal blade 44 corresponding to the blade 396 is rotatably installed at the other end of the rotating plate 43 (a torsion spring is installed between the rotating plate 43 and the material removal blade 44). A sliding groove 398 is opened on the inner wall of the blade sleeve 391, and a slider 47 is slidably installed inside the sliding groove 398. A lifting block 46 is fixedly connected to one side of the slider 47. The lifting block 46 is trapezoidal, and its inclined surface faces the middle of the blade sleeve 391. A fixed rod 48 is fixedly installed on the top surface of the lifting block 46, and the end of the fixed rod 48 away from the lifting block 46 is fixedly connected to the piston 392. An arc-shaped column 45 is fixedly installed on the outer side of the rotating plate 43, and the position of the arc-shaped column 45 matches the inclined surface of the lifting block 46.

[0030] When the air pressure chamber 393 is under negative pressure and the piston 392 moves upward, the lifting block 46 rises with the piston 392. Its inclined surface pushes the arc-shaped column 45 upward, thereby driving the rotating plate 43 to rotate around the fixed shaft 42. This causes the material removal knife 44 to swing towards the tool 396, and the cutting edge of the material removal knife 44 cuts into the surface of the tool 396, scraping off the clumps of material adhering to the tool 396. When the air pressure chamber 393 returns to positive pressure and the piston 392 moves downward, the lifting block 46 moves downward, the inclined surface disengages from the arc-shaped column 45, and the rotating plate 43 rotates in the opposite direction under the action of the reset element, causing the material removal knife 44 to retract from the tool 396.

[0031] The magnetic suction assembly 3 also includes an air jet mechanism 38 for blowing away residual material on the outer surface of the magnetic suction roller 34. Specifically, the air jet mechanism 38 includes an air pump 384 fixedly connected to the top surface of the top plate 31. The output end of the air pump 384 is fixedly connected to a connecting pipe 383. The end of the connecting pipe 383 away from the air pump 384 is fixedly connected to a buffer cylinder 381. A high-pressure nozzle 382 corresponding to the surface of the magnetic suction roller 34 is connected to the buffer cylinder 381. The spray direction of the high-pressure nozzle 382 is towards the surface of the magnetic suction roller 34.

[0032] The jet mechanism 38 is connected to the pressure chamber 393 and is used to control the pressure inside the pressure chamber 393. The input end of the air pump 384 is fixedly connected to an air intake pipe 387, which is connected to an extension pipe 385. The extension pipe 385 is connected to the pressure chamber 393 and is equipped with an electric valve. An air supply pipe 386 is fixedly connected to the air intake pipe 383 and is also connected to the pressure chamber 393. An electric valve is also equipped on the air supply pipe 386. By controlling the on / off state of the two electric valves and the operating state of the air pump 384, compressed air can be selectively injected into the pressure chamber 393 (positive pressure) or air can be drawn from the pressure chamber 393 (negative pressure), thereby precisely controlling the pressure changes inside the pressure chamber 393 and driving the piston 392 to rise and fall. Meanwhile, the compressed air generated by the air pump 384 is stabilized by the buffer cylinder 381 and then sprayed onto the surface of the magnetic roller 34 by the high-pressure nozzle 382, ​​blowing off the tiny particles or sticky residues that were not completely removed by the scraper.

[0033] In summary, when using this iron and impurity removal device for the resource recovery of paint-type waste: Before the device is started, the speed of the servo motor 36, the speed of the drive motor 14, and the working cycle of the air pump 384 are set through the control system. After startup, the drive motor 14 drives the conveyor belt 13 to move at a constant speed. Paint waste falls onto the conveyor belt 13 from the upstream feed port and passes sequentially through the filter screen 22 of the first filter assembly 2, the magnetic suction assembly 3, and the filter screen 22 of the second filter assembly 2. At the same time, the servo motor 36 drives the magnetic suction roller 34 to rotate, and its magnetic area attracts ferromagnetic impurities in the material passing below to the outer surface of the magnetic suction roller 34. At this time, the blade 396 of the scraper mechanism 39 is in the raised position to avoid obstructing the initial rotation of the magnetic suction roller 34.

[0034] When the magnetic roller 34 has absorbed enough ferromagnetic impurities and rotated to the position of the scraper mechanism 39, the control system issues a command to perform a scraping operation: close the first electric valve on the extension pipe 385 and open the second electric valve on the air supply pipe 386. The air pump 384 continues to operate, and the high-pressure gas it outputs enters the pressure chamber 393 through the connecting pipe 383 and the air supply pipe 386. The pressure in the pressure chamber 393 rises rapidly (positive pressure), pushing the piston 392 downward along the guide rod 397. The piston 392 drives the cutter 396 downward through the connecting rod 395, so that the cutting edge of the cutter 396 is in close contact with the outer surface of the magnetic roller 34. As the magnetic roller 34 continues to rotate, the cutter 396 scrapes off the ferromagnetic impurities adsorbed on the surface of the magnetic roller 34.

[0035] To remove the adhering material from the surface of the cutter 396, the control system periodically performs lifting and material removal operations on the cutter 396: the second electric valve on the air supply pipe 386 is closed, and the first electric valve on the extension pipe 385 is opened. The input end of the air pump 384 is connected to the air pressure chamber 393 through the suction pipe 387 and the extension pipe 385. The air pump 384 continuously draws air from the air pressure chamber 393, causing the pressure inside the air pressure chamber 393 to drop rapidly (negative pressure). Under the action of negative pressure, the piston 392 moves upward, driving the connecting rod 395 and the cutter 396 to rise together, so that the cutting edge of the cutter 396 completely disengages from the surface of the magnetic suction roller 34 and retracts into the receiving cavity 394. At the same time as the cutter 396 rises, the fixed rod 48, which is fixedly connected to the piston 392, also drives the lifting block 46 to rise synchronously. The inclined surface of the lifting block 46 contacts the arc-shaped column 45 on the rotating plate 43 and generates a thrust, forcing the rotating plate 43 to swing towards the tool 396. The material removal tool 44 swings accordingly, scraping off the material adhering to the tool 396.

[0036] After the material removal operation is completed, the control system switches the valves again: closing the electric valve on the extension pipe 385 and opening the electric valve on the air supply pipe 386. The air pump 384 refills the air pressure chamber 393 with compressed air, raising the pressure in the chamber to positive pressure again, pushing the piston 392 downwards. The cutter 396 descends, and simultaneously the lifting block 46 moves downwards, its inclined surface disengaging from the arc-shaped column 45. The rotating plate 43 swings in the opposite direction under gravity, causing the material removal blade 44 to retract from the cutter 396. The cutter 396 then re-adhere tightly to the surface of the magnetic roller 34, continuing the scraping task.

[0037] Throughout the scraping and removal process, part of the high-pressure gas output by the air pump 384 enters the air pressure chamber 393 through the air supply pipe 386, while the other part enters the buffer cylinder 381 through the connecting pipe 383. After pressure stabilization, the high-pressure gas is sprayed onto the surface of the magnetic roller 34 by the high-pressure nozzle 382. The high-pressure airflow can blow away the tiny particles or sticky residues on the surface of the magnetic roller 34 that were not scraped off by the blade 396, while also removing some moisture, which helps to keep the surface of the magnetic roller 34 dry and clean.

[0038] Through the periodic repetition of the above steps and the continuous conveying of the conveyor belt 13, this device can achieve continuous iron and impurity removal of paint waste, eliminating the need for frequent manual shutdowns to clean the scraper, thus improving the automation level and operational stability of the production line.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A paint waste resource utilization iron and impurity removal device, characterized in that: The system includes a conveying assembly (1) for conveying paint, two filter assemblies (2) disposed above the conveying assembly (1), and a magnetic suction assembly (3) disposed between the two filter assemblies (2). The magnetic suction assembly (3) includes a top plate (31), and a connecting frame (32) is fixedly disposed below the top plate (31). A bearing seat (33) is fixedly disposed on the bottom surface of the connecting frame (32), and a magnetic suction roller (34) is rotatably disposed on the inner side of the bearing seat (33). A scraper mechanism (39) is correspondingly disposed at the middle of the upper part of the magnetic suction roller (34), and the scraper mechanism (39) is used to scrape off the material on the outer surface of the magnetic suction roller (34). The scraper mechanism (39) includes a blade sleeve (391) fixedly connected to the top plate (31), and a piston (392) is slidably disposed on the inner side of the blade sleeve (391) in the vertical direction. A connecting rod (395) is fixedly provided on the bottom surface of the piston (392), and a cutter (396) corresponding to the magnetic roller (34) is fixedly provided at the end of the connecting rod (395) away from the piston (392). The piston (392) divides the inner space of the cutter sleeve (391) into a pressure chamber (393) and a receiving chamber (394). The cutter (396) is located in the receiving chamber (394). A material removal mechanism (4) is provided on the inner side of the receiving chamber (394). The material removal mechanism (4) is used to remove the adhesive material on the outer surface of the cutter (396). The magnetic suction assembly (3) also includes a jetting mechanism (38). The jetting mechanism (38) is used to blow away the material on the outer surface of the magnetic roller (34). The jetting mechanism (38) is connected to the pressure chamber (393) and is used to control the pressure in the pressure chamber (393).

2. The paint waste resource utilization iron and impurity removal device according to claim 1, characterized in that: A guide rod (397) is fixedly provided on the inner side of the blade sheath (391), and the guide rod (397) is slidably connected to the piston (392).

3. The paint waste resource utilization iron and impurity removal device according to claim 2, characterized in that: The material removal mechanism (4) includes a fixed plate (41) fixedly connected to the guide rod (397), and a fixed shaft (42) is fixedly provided on the inner side of the fixed plate (41). A rotating plate (43) is slidably provided on the outer side of the fixed shaft (42), and a material removal knife (44) corresponding to the knife (396) is rotatably provided at one end of the rotating plate (43) away from the fixed shaft (42).

4. The iron and impurity removal device for paint waste resource utilization according to claim 3, characterized in that: The inner wall of the blade sheath (391) is provided with a sliding groove (398), and a slider (47) is slidably arranged inside the sliding groove (398). A lifting block (46) is fixedly connected to one side of the slider (47), and the lifting block (46) is trapezoidal. A connecting rod (395) is fixedly arranged on the top surface of the lifting block (46), and the end of the connecting rod (395) away from the lifting block (46) is fixedly connected to the bottom surface of the piston (392). An arc-shaped column (45) is fixedly arranged on the outer side of the rotating plate (43), and the arc-shaped column (45) cooperates with the lifting block (46) to drive the rotating plate (43) to rotate along the fixed axis (42). A fixed rod (48) is fixedly arranged on the top surface of the lifting block (46), and the end of the fixed rod (48) away from the lifting block (46) is fixedly connected to the piston (392).

5. The paint waste resource recovery iron and impurity removal device according to claim 1, characterized in that: The jetting mechanism (38) includes an air pump (384) fixedly connected to the top surface of the top plate (31), and the output end of the air pump (384) is fixedly connected to a connecting pipe (383). The end of the connecting pipe (383) away from the air pump (384) is fixedly connected to a buffer cylinder (381), and a high-pressure nozzle (382) corresponding to the magnetic roller (34) is connected to the buffer cylinder (381).

6. The iron and impurity removal device for the resource utilization of coating waste according to claim 5, characterized in that: The input end of the air pump (384) is fixedly connected to the air intake pipe (387), and the air intake pipe (387) is connected to the extension pipe (385). The extension pipe (385) is connected to the air pressure chamber (393), and an electric valve is provided on the extension pipe (385).

7. The iron and impurity removal device for the resource utilization of coating waste according to claim 6, characterized in that: A gas supply pipe (386) is fixedly connected to the connecting pipe (383), and the gas supply pipe (386) is connected to the air pressure chamber (393). An electric valve is installed on the gas supply pipe (386).

8. The iron and impurity removal device for the resource utilization of paint waste according to claim 1, characterized in that: A coupling (35) is provided on one side of the magnetic roller (34), and a servo motor (36) is provided at the end of the coupling (35) away from the magnetic roller (34). The servo motor (36) drives the magnetic roller (34) to rotate through the coupling (35). A reinforcing rod (37) is fixedly provided on the outside of the servo motor (36), and the reinforcing rod (37) is fixedly connected to the top plate (31).

9. The iron and impurity removal device for the resource utilization of paint-type waste according to claim 1, characterized in that: The filter assembly (2) includes a fixed frame (21) fixedly connected to the conveying assembly (1), and a filter screen (22) is provided on the inner side of the fixed frame (21). A reinforcing member (23) or a triangular plate (24) is fixedly provided on the outer side of the fixed frame (21), and the reinforcing member (23) or the triangular plate (24) is fixedly connected to the conveying assembly (1) or the top plate (31) respectively.

10. The iron and impurity removal device for the resource utilization of paint waste according to claim 1, characterized in that: The conveying assembly (1) includes a bracket (11) and the bracket (11) is connected to an external fixed object. A drive wheel (12) is rotatably arranged below the bracket (11) and a conveyor belt (13) is coupled to the outside of the drive wheel (12). A drive motor (14) is arranged on the outside of the drive wheel (12) and the drive motor (14) drives the conveyor belt (13) to move through the drive wheel (12).

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