A surface spraying device for automatic coating passivation

Abstract

The application relates to the technical field of metal spraying, and discloses a surface spraying device for automatic coating and passivation, which comprises a supporting base, a rotating disc, a mounting frame and a limiting rod suitable for being driven to rotate, the top end of the supporting base is fixedly connected with a device shell, an integrated processing assembly is installed in the device shell, the rotating disc is inserted with the limiting rod, the rotating disc is suitable for being circumferentially limited on the limiting rod to drive the rotating disc to circumferentially rotate and axially move on the limiting rod, a guide groove is formed in the mounting frame, the side end of the rotating disc is fixedly connected with a guide rod, the guide rod is limitingly and slidingly connected in the guide groove, and the guide groove cooperates with the guide rod to make the rotating disc suitable for intermittent action when rotating. Through the technical scheme, the surface spraying device in the prior art cannot automatically and stably complete the cleaning, rust removal, spraying and drying of metal workpieces, and the automation degree is low.

Description

Technical Field

[0001] This invention relates to the field of metal spraying technology, and more specifically, to an automatic surface spraying apparatus for coating and passivation. Background Technology

[0002] Spray coating is a method to protect metal workpieces from oxidation and corrosion. Corrosion phenomena that occur around us refer to the damage, performance degradation, or deterioration of various materials under environmental influences (a combination of chemical, electrochemical, and physical factors). Spray coating is a very important means of protecting metals from corrosion. A good spray coating layer remains continuous, intact, and well-bonded, serving as a barrier to inhibit the intrusion of corrosive media.

[0003] Existing surface coating devices for metal workpiece production and processing have some problems in actual use. For example, an automatic coating device for metal sheet products with publication number CN113560074B, although capable of multi-layer coating of metal sheets, has relatively limited functionality and low automation. It can only complete the coating of metal workpieces. Since the surface of metal workpieces is prone to oxidation and rust before coating, workers need to use other equipment to clean and remove rust before surface coating. After cleaning and rust removal, the workpieces need to be transferred to the coating equipment for subsequent coating. This results in low processing efficiency, increased labor intensity for workers, and increased processing costs. Summary of the Invention

[0004] This invention proposes an automatic surface coating and passivation device that can automatically and stably complete the cleaning, pickling, and coating of metal workpieces, solving the problems of low automation and poor safety in related surface coating devices.

[0005] The technical solution of the present invention is as follows:

[0006] An automatic surface coating and passivation device includes a support base, a turntable, a mounting frame, and a limiting rod adapted to be driven to rotate. A device housing is fixedly connected to the top of the support base, and an integrated processing component is installed inside the device housing. The turntable is inserted into the limiting rod, and the turntable is adapted to be circumferentially limited by the limiting rod so as to drive the turntable to rotate circumferentially and move axially on the limiting rod. A guide groove is provided on the mounting frame, and a guide rod is fixedly connected to the side end of the turntable. The guide rod is slidably connected within the guide groove, and the guide groove is connected to the... The guide rods are designed to allow the turntable to rotate intermittently. The intermittent rotation involves moving upwards to the top of the mounting frame, rotating circumferentially at the top, and then moving downwards to the bottom. A hydraulic rod is mounted on the top side of the mounting frame, and its bottom end is fixed to the side of the device housing. Multiple workpiece clamping assemblies are mounted on the turntable. The device housing contains loading and unloading stations, and the housing has corresponding door panels that are adapted to open and allow metal workpieces to be placed inside. The integrated processing assembly includes components corresponding to cleaning, pickling, and... The passivation stage includes a first processing frame, a second processing frame, and a third processing frame, all fixedly connected to the bottom surface inside the outer casing of the device. Each of the first, second, and third processing frames is connected to a drain pipe, on which a solenoid valve is installed. Filter frames are rotatably connected inside the first and second processing frames, with a support rod fixedly connected inside each filter frame, and a cleaning brush fixedly connected to the support rod. A flow guide frame is rotatably connected inside the third processing frame, with a flow guide channel installed within it. The spray nozzle is installed and communicates with the flow guide channel. The top of the flow guide frame is connected to the flow guide ring, which is also connected to the flow guide channel. The top of the flow guide ring is connected to a sealing plate. The flow guide ring is adapted to rotate relative to the sealing plate. The sealing plate is connected to a delivery pipe adapted to supply passivation coating. The turntable is adapted to be driven to rotate so that the corresponding workpiece clamping assembly corresponds to the corresponding loading / unloading station, cleaning station, pickling station, and passivation station. The workpiece clamped on the workpiece clamping assembly on the turntable is adapted to enter the corresponding filter frame or the flow guide frame during the axial movement of the turntable.

[0007] As a preferred embodiment of the present invention, the guide groove includes a guide groove group continuously arranged in the circumferential direction. The guide groove group includes a first inclined groove, a circumferential flat groove and a second inclined groove. The upper end of the first inclined groove is connected to one end of the circumferential flat groove, the other end of the circumferential flat groove is connected to the upper end of the second inclined groove, and the lower end of the second inclined groove is connected to the lower end of the first inclined groove of the adjacent guide groove group.

[0008] In a preferred embodiment of the present invention, a servo motor is mounted on the bottom surface of the support base, the output end of the servo motor is connected to a rotating shaft, the top end of the rotating shaft is fixedly connected to the bottom end of the limiting rod, a first gear is fixedly connected to the rotating shaft, three connecting shafts are rotatably connected to the bottom of the device housing, two of which are respectively connected to the corresponding filter frames, and the remaining connecting shaft is connected to the flow guide frame, a second gear is fixedly connected to each connecting shaft, the second gear meshes with the first gear, the filter frame and the flow guide frame are adapted to be driven to rotate when the rotating shaft rotates, a limiting block is fixedly connected to the bottom surface of the filter frame and the bottom surface of the flow guide frame, the limiting block is fixedly fixed to the bottom center of the filter frame and the bottom center of the flow guide frame, a second limiting groove is opened at the top end of the connecting shaft, and the limiting block is engaged in the second limiting groove of the corresponding connecting shaft.

[0009] In a preferred embodiment of the present invention, a liquid storage tank is installed inside the outer casing of the device, the other end of the delivery pipe is connected to the liquid storage tank, a water pump is connected to the delivery pipe, at least a portion of the rotating shaft passes through the liquid storage tank, a stirring rod is fixedly connected to the portion of the rotating shaft inside the liquid storage tank, four sets of nozzles are provided, the four sets of nozzles are distributed at equal angles on the guide frame, each set of nozzles has four nozzles, the four nozzles are distributed at equal intervals on the guide frame, the guide frame is in contact with the inner wall of the third processing frame, and four sets of stirring rods are provided, the four sets of stirring rods are distributed at equal angles on the rotating shaft, each set of stirring rods is distributed at equal intervals on the rotating shaft.

[0010] In a preferred embodiment of the present invention, a first limiting groove is formed through the turntable, and a limiting rod is slidably connected through the first limiting groove. The cross-sections of the limiting rod, the first limiting groove, and the third limiting groove are all rectangular. The diameter of the mounting frame is equal to the diameter of the device housing. The top surface of the device housing is in contact with the bottom surface of the mounting frame. The hydraulic rods are symmetrically distributed on both sides of the top of the mounting frame. The diameter of the turntable is smaller than the inner diameter of the mounting frame.

[0011] In a preferred embodiment of the present invention, the workpiece clamping assembly includes a fixed frame, which is fixedly connected to the bottom surface of the turntable. A bidirectional threaded rod is rotatably connected within the fixed frame. A spiral spring is fixedly connected to the bidirectional threaded rod, and the outer end of the spiral spring is fixedly connected to a limiting frame. The limiting frame is fixedly connected within the fixed frame. A coil and a connecting disc are fixedly connected to the bidirectional threaded rod. A traction rope is wound around the coil. The fixed frames are evenly distributed on the bottom surface of the turntable, and each fixed frame corresponds to one of the bidirectional threaded rods. A clamping plate is threadedly connected to the bidirectional threaded rod, and a positioning plate is fixedly connected to the clamping plate. The clamping plate is slidably connected within the fixed frame. The clamping plates are symmetrically distributed on both sides of the bidirectional threaded rod, and the positioning plates are symmetrically distributed on both sides of the clamping plate. The positioning plate is a right-angled triangle.

[0012] In a preferred embodiment of the present invention, a baffle is rotatably connected to the connecting plate, a return spring is fixedly connected to the baffle, the other end of the return spring is fixedly connected to the connecting plate, a connecting spring is fixedly connected to the side end of the fixing frame, a connecting rod is fixedly connected to the other end of the connecting spring, the connecting rod is slidably connected within the fixing frame, the baffles are evenly distributed on the connecting plate, the baffles correspond one-to-one with the return springs, and the width of the baffle is less than the length of the connecting rod.

[0013] In a preferred embodiment of the present invention, in order to dry the workpiece, a heat insulation frame is fixedly connected to the top of the mounting frame, a first filter plate is fixedly connected to the top of the heat insulation frame, and a second filter plate is fixedly connected to the bottom of the heat insulation frame. A driven shaft is rotatably connected to the first filter plate and the second filter plate. A transmission shaft is rotatably connected inside the heat insulation frame. A third limiting groove is provided at the bottom end of the transmission shaft. The top end of the limiting rod is engaged in the third limiting groove. A third gear is fixedly connected to the transmission shaft, and a fourth gear is fixedly connected to the driven shaft. The third gear and the fourth gear are meshed. A heating element is installed above the second filter plate. An exhaust fan located above the heating element and a scraper rod located above the first filter plate and adapted to rotate to scrape debris on the first filter plate are fixedly connected to the driven shaft.

[0014] In a preferred embodiment of the present invention, the top surface of the first filter plate, the bottom surface of the scraper, and the top surface of the insulation frame are flush; the length of the scraper is greater than the diameter of the first filter plate; and the bottom surface of the insulation frame, the bottom surface of the second filter plate, and the inner top surface of the support base are flush.

[0015] The working principle and beneficial effects of this invention are as follows:

[0016] 1. This invention includes an integrated processing component. Driven by the meshing of a first gear and various second gears, the filter frames within the first and second processing frames rotate automatically. Simultaneously, the guide frame within the third processing frame rotates automatically. The clean water and cleaning brush within the first processing frame efficiently remove dirt, grease, and other impurities from the surface of the metal workpiece. Furthermore, the pickling agent and cleaning brush within the second processing frame perform pickling treatment on the surface of the metal workpiece, removing oxides and rust. This helps ensure that the passivation coating adheres evenly to the metal surface. Similarly, by driving the guide frame at the third processing frame… The rotating frame, combined with the various nozzles, enables comprehensive and uniform spraying of metal workpieces. This ensures that the passivation coating is evenly applied to the outer surface of the metal workpiece, increasing its corrosion resistance, extending its service life, and improving its appearance. Furthermore, during operation of the integrated processing unit, the rotating shaft drives the stirring rods to rotate at a constant speed within the storage tank, continuously agitating the coating and preventing sedimentation or clumping during storage, which could affect the stability of subsequent spraying operations. This increases the versatility of the spraying device, enhances its automation level, and ultimately improves its working efficiency.

[0017] 2. This invention includes a workpiece clamping assembly. By pulling down the traction rope on the coil, the bidirectional threaded rod can be driven to rotate conveniently and continuously. In conjunction with the positioning plates on both sides of the clamping plates, metal workpieces of different sizes can be clamped, fixed, and positioned conveniently and stably, ensuring that the metal workpiece is located directly below the fixed frame, thereby ensuring the stability of its subsequent movement and processing. After the work is completed, simply push the connecting rod outward. At this time, under the elastic action of the spiral spring, the bidirectional threaded rod can be driven to automatically rotate, thereby completing the unloading of metal workpieces conveniently and efficiently. This effectively improves the convenience and efficiency of the device's loading and unloading operations, thereby enhancing the device's working efficiency.

[0018] 3. This invention is equipped with guide rods and guide grooves. The rotating shaft can drive the turntable to rotate smoothly and slowly. Under the guidance of the guide groove, the turntable can automatically and stably reciprocate up and down during rotation through the guide rod in the guide groove. At this time, under the continuous movement of the turntable, it can drive the various clamped and positioned metal workpieces to gradually move into the first processing frame, the second processing frame and the third processing frame, thereby automatically and efficiently completing a series of processes such as cleaning, pickling, spraying and drying of metal workpieces. It effectively improves the automation level of the spraying device, has a simple structure, low cost, is easy to operate and is easy to promote and use.

[0019] 4. The present invention is equipped with an exhaust fan and a heating element. During the movement of the metal workpiece, after it has been cleaned, pickled or sprayed, when it leaves the first processing frame, the second processing frame or the third processing frame, the continuous rotation of the exhaust fan, combined with the heating element, can use hot air to efficiently and evenly dry the cleaned, pickled or sprayed metal workpiece, avoiding the influence of residual moisture or pickling agent on the metal workpiece on the subsequent spraying work, and improving the working efficiency of the device. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection structure between the flow guide frame and the flow guide ring of the present invention;

[0023] Figure 3 This is a schematic diagram of the connection structure between the bidirectional threaded rod and the spiral spring of the present invention;

[0024] Figure 4 This is a schematic diagram of the overall main cross-sectional structure of the present invention;

[0025] Figure 5 This is the present invention. Figure 4 Schematic diagram of the structure at point A in the middle;

[0026] Figure 6 This is a top-section schematic diagram of the outer casing of the device of the present invention;

[0027] Figure 7 This is a schematic diagram of the unfolded structure of the mounting frame of the present invention;

[0028] Figure 8 This is a top view schematic diagram of the first gear structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the main cross-sectional structure of the flow guide frame of the present invention;

[0030] Figure 10 This is a schematic diagram of the main cross-sectional structure of the fixed frame of the present invention;

[0031] Figure 11 This is a side view of the coil structure of the present invention;

[0032] Figure 12 This is a schematic diagram of the side cross-section of the connecting disc of the present invention;

[0033] Figure 13 This is a side sectional view of the fixed frame structure of the present invention;

[0034] Figure 14 This is a bottom view of the fixed frame structure of the present invention;

[0035] Figure 15 This is a schematic diagram of the turntable structure from below in this invention;

[0036] Figure 16 This is a schematic diagram of the main cross-sectional structure of the insulation frame of the present invention;

[0037] Figure 17 This is a bottom view schematic diagram of the third gear structure of the present invention.

[0038] In the diagram: 1. Support base; 2. Device housing; 3. Integrated processing component; 301. First processing frame; 302. Second processing frame; 303. Third processing frame; 304. Drain pipe; 305. Solenoid valve; 306. Filter screen frame; 307. Support rod; 308. Cleaning brush; 309. Limiting block; 310. Flow guide frame; 311. Nozzle; 312. Flow guide ring; 313. Sealing plate; 314. Delivery pipe; 315. Water pump; 316. Storage tank; 317. Servo motor; 318. Rotating shaft; 319. Stirring rod; 320. First gear; 321. Second gear; 322. Connecting shaft; 323. Second limiting groove; 4. Limiting rod; 5. First limiting groove; 6. Turntable; 7. Guide. 1. Rod; 8. Guide groove; 9. Mounting frame; 10. Hydraulic rod; 11. Workpiece clamping assembly; 1101. Fixing frame; 1102. Bidirectional threaded rod; 1103. Spiral spring; 1104. Limiting frame; 1105. Coil; 1106. Traction rope; 1107. Connecting disc; 1108. Baffle; 1109. Return spring; 1110. Connecting spring; 1111. Connecting rod; 1112. Clamping plate; 1113. Positioning plate; 12. Insulation frame; 13. First filter plate; 14. Second filter plate; 15. Drive shaft; 16. Third limiting groove; 17. Third gear; 18. Fourth gear; 19. Driven shaft; 20. Exhaust fan; 21. Scraper rod; 22. Heating element; 23. Door panel. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1

[0041] like Figures 1 to 17As shown, this embodiment proposes an automatic surface coating and passivation spraying device, including a support base 1, a turntable 6, a mounting frame 9, and a limiting rod 4 suitable for being driven to rotate. A device housing 2 is fixedly connected to the top of the support base 1, and an integrated processing component 3 is installed inside the device housing 2. The turntable 6 is inserted into the limiting rod 4, and the turntable 6 is adapted to be circumferentially limited by the limiting rod 4 so as to drive the turntable 6 to rotate circumferentially and move axially on the limiting rod 4. A guide groove 8 is provided on the mounting frame 9, and a guide rod 7 is fixedly connected to the side end of the turntable 6. The guide rod 7 is slidably connected within the guide groove 8, and the guide groove 8 cooperates with the guide rod 7 to allow the turntable 6 to rotate circumferentially and move axially on the limiting rod 4. The rotation is suitable for intermittent operation, which involves moving upwards to the top of the mounting frame 9, rotating circumferentially at the top, and then moving downwards to the bottom. A hydraulic rod 10 is installed on the top side of the mounting frame 9, and the bottom end of the hydraulic rod 10 is fixed to the side of the device housing 2. Multiple workpiece clamping assemblies 11 are installed on the turntable 6. The device housing 2 has loading and unloading stations, and door panels 23 corresponding to the loading and unloading stations and suitable for opening to place metal workpieces inside are installed on the device housing 2. The integrated processing assembly 3 includes a first processing frame 301, a second processing frame 302, and a third processing frame 303 corresponding to the cleaning station, pickling station, and passivation station, respectively. The first processing frame 301, the second processing frame 302, and the third processing frame 303 are all fixedly connected to the bottom surface inside the outer casing 2 of the device. Each of the three processing frames is connected to a drain pipe 304, and a solenoid valve 305 is installed on the drain pipe 304. A filter frame 306 is rotatably connected inside both the first and second processing frames 301 and 302. A support rod 307 is fixedly connected inside the filter frame 306, and a cleaning brush 308 is fixedly connected to the support rod 307. A flow guide frame 310 is rotatably connected inside the third processing frame 303. A flow guide channel is installed inside the flow guide frame 310, and a flow guide is mounted on the flow guide frame 310. The nozzle 311 is connected to the flow channel. The top of the flow guide 310 is connected to the flow guide ring 312, which is also connected to the flow channel. The top of the flow guide ring 312 is connected to the sealing plate 313. The flow guide ring 312 is adapted to rotate relative to the sealing plate 313. The sealing plate 313 is connected to a delivery pipe 314 suitable for supplying passivation coating. The turntable 6 is adapted to be driven to rotate so that the corresponding workpiece clamping assembly 11 corresponds to the corresponding loading / unloading station, cleaning station, pickling station, and passivation station. The workpiece clamped on the workpiece clamping assembly 11 on the turntable 6 is adapted to enter the corresponding filter frame 306 or flow guide 310 during the axial movement of the turntable 6.

[0042] Specifically, in this embodiment, the guide groove 8 includes a guide groove group continuously arranged along the circumferential direction. The guide groove group includes a first inclined groove, a circumferential flat groove and a second inclined groove. The upper end of the first inclined groove is connected to one end of the circumferential flat groove, the other end of the circumferential flat groove is connected to the upper end of the second inclined groove, and the lower end of the second inclined groove is connected to the lower end of the first inclined groove of the adjacent guide groove group.

[0043] Specifically, the first processing frame 301, the second processing frame 302, and the third processing frame 303 are the same in shape and size. The inner walls of the first processing frame 301 and the second processing frame 302 are both in contact with the side end face of the filter frame 306. The support rods 307 are distributed at equal angles inside the filter frame 306, and the cleaning brushes 308 are distributed at equal intervals on the support rods 307. The length of the support rods 307 is greater than the depth of the first processing frame 301. The filter frame 306 can be used to filter impurities from the cleaning and pickling liquids, ensuring that the clean water and pickling liquid can be recycled and reused.

[0044] Specifically, in order to drive the corresponding filter frame 306 or flow guide 310 to rotate, a servo motor 317 is installed on the bottom surface of the support base 1. The output end of the servo motor 317 is connected to a rotating shaft 318. The top end of the rotating shaft 318 is fixedly connected to the bottom end of the limit rod 4. A first gear 320 is fixedly connected to the rotating shaft 318. Three connecting shafts 322 are rotatably connected to the bottom of the device housing 2. Two of the connecting shafts 322 are connected to the corresponding filter frames 306 respectively, and the remaining connecting shaft 322 is connected to the flow guide 310. A second gear 321 is fixedly connected to each connecting shaft 322. The second gear 321 meshes with the first gear 320. The filter frame 306 and the flow guide 310 are adapted to be driven to rotate when the rotating shaft 318 rotates.

[0045] Specifically, a limiting block 309 is fixedly connected to the bottom end face of the filter frame 306 and the bottom end face of the flow guide 310. The limiting block 309 is fixed to the bottom center of the filter frame 306 and the bottom center of the flow guide 310 respectively. A second limiting groove 323 is opened at the top end of the connecting shaft 322, and the limiting block 309 is engaged in the second limiting groove 323 of the corresponding connecting shaft 322.

[0046] In this embodiment, a liquid storage tank 316 is installed inside the device housing 2, the other end of the delivery pipe 314 is connected to the liquid storage tank 316, a water pump 315 is connected to the delivery pipe 314, at least a portion of the rotating shaft 318 passes through the liquid storage tank 316, and a stirring rod 319 is fixedly connected to the portion of the rotating shaft 318 inside the liquid storage tank 316.

[0047] Specifically, four sets of nozzles 311 are provided, and the four sets of nozzles 311 are distributed at equal angles on the flow guide frame 310. Each set of nozzles 311 has four nozzles, and the four nozzles 311 are equidistantly distributed on the flow guide frame 310. The flow guide frame 310 is in contact with the inner wall of the third processing frame 303. Four sets of stirring rods 319 are provided, and the four sets of stirring rods 319 are distributed at equal angles on the rotating shaft 318. Each set of stirring rods 319 is equidistantly distributed on the rotating shaft 318. By driving the flow guide frame 310 to rotate within the third processing frame 303, the various nozzles are combined. 311 can perform comprehensive and uniform spraying treatment on metal workpieces, so that the passivation coating is evenly coated on the outer surface of the metal workpieces, increasing the corrosion resistance of the metal surface, extending the service life of metal products, and improving their appearance. Moreover, during the operation of the integrated processing component 3, the rotating shaft 318 can drive each stirring rod 319 to rotate at a uniform speed in the liquid storage tank 316, continuously stirring the coating in the liquid storage tank 316, avoiding the precipitation or clumping of the coating during storage, which would affect the stability of subsequent spraying work.

[0048] In this embodiment, the diameter of the second gear 321 is smaller than that of the first gear 320. The cross-section of the limiting block 309 and the cross-section of the second limiting groove 323 are both rectangular. There are three second gears 321, which are located directly below the first processing frame 301, the second processing frame 302, and the third processing frame 303, respectively. Through the meshing drive of the first gear 320 and each of the second gears 321, the filter frame 306 in the first processing frame 301 and the second processing frame 302 can be driven to rotate automatically. At the same time, the guide frame 310 in the third processing frame 303 can be driven to rotate automatically. The clean water and the cleaning brush 308 in the first processing frame 301 can be used to thoroughly and efficiently remove dirt, grease and other impurities from the surface of the metal workpiece. In addition, the pickling agent and the cleaning brush 308 in the second processing frame 302 can be used to pickle the surface of the metal workpiece to be treated, remove oxides and rust from the metal surface, and help ensure that the passivation coating can be evenly attached to the metal surface.

[0049] In this embodiment, a first limiting groove 5 is provided through the turntable 6, and a limiting rod 4 is slidably connected through the first limiting groove 5. The cross-section of the limiting rod 4 and the cross-section of the first limiting groove 5 are both rectangular. The diameter of the mounting frame 9 is equal to the diameter of the device housing 2. The top surface of the device housing 2 is in contact with the bottom surface of the mounting frame 9. The hydraulic rods 10 are symmetrically distributed on both sides of the top of the mounting frame 9. The diameter of the turntable 6 is smaller than the inner diameter of the mounting frame 9.

[0050] Example 2

[0051] like Figures 1 to 17 As shown, based on Example 1, this example also proposes an automatic coating and passivation surface spraying device.

[0052] In this embodiment, in order to dry the workpiece on the workpiece clamping assembly 11 when the turntable 6 moves to its highest position, a heat insulation frame 12 is fixedly connected to the top of the mounting frame 9, a first filter plate 13 is fixedly connected to the top of the heat insulation frame 12, and a second filter plate 14 is fixedly connected to the bottom of the heat insulation frame 12. A driven shaft 19 is rotatably connected to the first filter plate 13 and the second filter plate 14, and a drive shaft 15 is rotatably connected inside the heat insulation frame 12. A third limit is provided at the bottom end of the drive shaft 15. The top end of the limiting rod 4 is engaged in the third limiting groove 16. A third gear 17 is fixedly connected to the drive shaft 15, and a fourth gear 18 is fixedly connected to the driven shaft 19. The third gear 17 and the fourth gear 18 are meshed together. A heating element 22 is installed above the second filter plate 14. An exhaust fan 20 located above the heating element 22 and a scraper 21 located above the first filter plate 13 and adapted to rotate to scrape debris on the first filter plate 13 are fixedly connected to the driven shaft 19.

[0053] Of course, the mounting frame 9 is also equipped with an exhaust hole for venting.

[0054] Specifically, the cross-section of the third limiting groove 16 is also rectangular, and the limiting rod 4 can be stably inserted into the third limiting groove 16 and connected to the transmission shaft 15 to ensure the stability of the subsequent working state of the transmission shaft 15.

[0055] In this embodiment, the heat insulation frame 12 is fixed at the top center of the mounting frame 9. The fourth gear 18 is distributed at equal angles on the third gear 17. The diameter of the third gear 17 is larger than the diameter of the fourth gear 18. The fourth gear 18 corresponds one-to-one with the exhaust fan 20 through the driven shaft 19. The exhaust fan 20, the first filter plate 13, and the second filter plate 14 have the same diameter. During the movement of the workpiece, after cleaning, pickling, or spraying, when it leaves the first processing frame 301, the second processing frame 302, or the third processing frame 303, the continuous rotation of the exhaust fan 20, combined with the heating element 22, can use hot air to efficiently and uniformly dry the cleaned, pickled, or sprayed metal workpiece, avoiding the influence of residual moisture or pickling agent on the metal workpiece on subsequent spraying work.

[0056] In this embodiment, the top surface of the first filter plate 13, the bottom surface of the scraper 21, and the top surface of the heat insulation frame 12 are flush. The length of the scraper 21 is greater than the diameter of the first filter plate 13. The bottom surface of the heat insulation frame 12, the bottom surface of the second filter plate 14, and the inner top surface of the support base 1 are flush. During the drying process, the outside air enters through the first filter plate 13. Under the continuous rotation of the scraper 21, the dust and impurities filtered on the upper surface of the first filter plate 13 can be automatically scraped and cleaned, ensuring the stability of the continuous working state of the first filter plate 13.

[0057] Example 3

[0058] Based on Example 1 or Example 2, this embodiment also proposes an automatic coating and passivation surface spraying device.

[0059] In this embodiment, to facilitate loading and unloading on the workpiece clamping assembly 11, the workpiece clamping assembly 11 includes a fixing frame 1101. The fixing frame 1101 is fixedly connected to the bottom surface of the turntable 6. A bidirectional threaded rod 1102 is rotatably connected inside the fixing frame 1101. A spiral spring 1103 is fixedly connected to the bidirectional threaded rod 1102. The outer end of the spiral spring 1103 is fixedly connected to a limiting frame 1104, which is fixedly connected to the fixing frame 1101. A coil 1105 and a connecting plate 1107 are fixedly connected to the bidirectional threaded rod 1102. A traction rope 1106 is wound around the coil 1105. The fixing frames 1101 are evenly distributed on the bottom surface of the turntable 6, and each fixing frame 1101 corresponds to one of the bidirectional threaded rods 1102. A clamping plate 1112 is threaded onto the rod 1102, and a positioning plate 1113 is fixedly connected to the clamping plate 1112. The clamping plate 1112 is slidably connected within the fixed frame 1101. The clamping plates 1112 are symmetrically distributed on both sides of the bidirectional threaded rod 1102, and the positioning plates 1113 are symmetrically distributed on both sides of the clamping plate 1112. The positioning plates 1113 are right-angled triangles. By pulling down the traction rope 1106 on the coil 1105, the bidirectional threaded rod 1102 can be driven to rotate conveniently and continuously. With the help of the positioning plates 1113 on the clamping plates 1112 on both sides, workpieces of different sizes can be conveniently and stably clamped, fixed, and positioned, ensuring that the workpiece is located directly below the fixed frame 1101, thereby ensuring the stability of its subsequent movement and processing.

[0060] In this embodiment, a baffle 1108 is rotatably connected to the connecting plate 1107, and a return spring 1109 is fixedly connected to the baffle 1108. The other end of the return spring 1109 is fixedly connected to the connecting plate 1107. A connecting spring 1110 is fixedly connected to the side end of the fixed frame 1101, and a connecting rod 1111 is fixedly connected to the other end of the connecting spring 1110. The connecting rod 1111 is slidably connected inside the fixed frame 1101. The baffles 1108 are evenly distributed on the connecting plate 1107, and the baffles 1108 correspond one-to-one with the return springs 1109. The width of the baffle 1108 is less than the length of the connecting rod 1111. After the work is completed, the connecting rod 1111 can be pushed outward. At this time, under the elastic action of the spiral spring 1103, the bidirectional threaded rod 1102 can be automatically rotated, thereby completing the workpiece unloading work conveniently and efficiently, effectively improving the convenience and efficiency of the device's loading and unloading work, and thus improving the working efficiency of the device.

[0061] In summary, the workpiece clamping assembly 11 enables convenient and efficient loading and unloading of metal workpieces. Furthermore, the rotation of the turntable 6, combined with the guide rod 7 and guide groove 8, allows for automatic and stable cleaning, pickling, spraying, and drying of the metal workpieces in conjunction with the integrated processing assembly 3. This effectively improves the automation level of the spraying device. The structure is simple, cost-effective, easy to operate, and readily applicable. During the cleaning, pickling, spraying, and drying processes, the continuous rotation of the exhaust fan 20, combined with the heating element 22, utilizes hot air to efficiently and uniformly dry the cleaned, pickled, or sprayed metal workpieces, preventing residual moisture or pickling agent from affecting subsequent spraying operations. This increases the versatility of the spraying device, enhances its automation level, and ultimately improves its working efficiency.

[0062] The specific working process of this automatic coating and passivation surface spraying device is as follows: First, when the device starts working, the operator can open the door panel 23 on the device housing 2. Then, the operator can move the metal workpiece to be processed to below the fixed frame 1101 at the door panel 23. Initially, the guide rod 7 is located at the bottom of the guide groove 8. At this time, one of the fixed frames 1101 moves to a position close to the door panel 23, i.e., the loading / unloading station, and the top of the door panel 23 is approximately flush with the bottom of the nearest fixed frame 1101. The operator can then move the metal workpiece to below the fixed frame 1101 corresponding to the loading / unloading station. Afterwards, the operator can pull down the traction rope 1106. Under the pulling action of the traction rope 1106, the coil 1105 drives the bidirectional threaded rod 1102 to rotate automatically counterclockwise within the fixed frame 1101. This counterclockwise rotation of the bidirectional threaded rod 1102 causes the threaded clamping plates 1112 on both sides to move towards the center simultaneously. The movement of the clamping plates 1112, combined with the inclined surfaces of the four positioning plates 1113, clamps and fixes the four corners of the top of the metal workpiece. Furthermore, the inclined surfaces of the four positioning plates 1113 automatically clamp and fix the metal workpiece directly below the fixed frame 1101. The bidirectional threaded rod 1102... During counterclockwise rotation, the connecting plate 1107 drives each baffle 1108 to rotate counterclockwise. At this time, under the blocking action of the connecting rod 1111, the baffle 1108 is automatically pushed to rotate towards the bidirectional threaded rod 1102. The connecting rod 1111 cannot obstruct the rotation of the bidirectional threaded rod 1102, thus the clamping operation can be carried out conveniently and smoothly. After the clamping operation is completed, the connecting rod 1111 is located between the baffle 1108 and the bidirectional threaded rod 1102. At this time, under the blocking action of the connecting rod 1111, the baffle 1108 effectively prevents the bidirectional threaded rod 1102 from rotating back, thereby achieving self-locking operation. Therefore, the clamping state can always be maintained. Stable, and when it is necessary to unload metal workpieces, the operator only needs to pull the connecting rod 1111 on the connecting spring 1110 outward, so that the connecting rod 1111 moves away from the baffle 1108. At this time, the baffle 1108 loses its obstruction. Therefore, under the elastic action of the spiral spring 1103 inside the limit frame 1104, the bidirectional threaded rod 1102 can be driven to rotate automatically in the opposite direction in the fixed frame 1101, that is, rotate clockwise. At this time, under the reverse rotation action of the bidirectional threaded rod 1102, the clamping plates 1112 and positioning plates 1113 on both sides can be driven to move automatically to the side and detach from the metal workpiece, thereby completing the convenient unloading of the metal workpiece.

[0063] After the metal workpiece is clamped stably, the operator can control the servo motor 317 on the support base 1. Driven by the servo motor 317, the turntable 6 can be rotated stably via the limiting rod 4 at the top of the rotating shaft 318 and the first limiting groove 5. During the rotation of the turntable 6, guided by the guide groove 8, the guide rod 7 moves upward first, then in a parallel circumferential motion, then downward and then upward again. This process repeats, and the turntable 6 on the guide rod 7 can simultaneously perform up-and-down reciprocating motion while rotating continuously. Therefore, the guide rod 7 can drive the turntable 6 to move up and down along the guide groove 8. That is to say, when the metal workpiece after being clamped and loaded rotates with the turntable 6, it first moves upward, then rotates in parallel circumferential direction, and then moves downward. At this time, the metal workpiece can be inserted into the first processing frame 301, and the next fixed frame 1101 moves to the position close to the door panel 23. The operator can load the metal workpiece at the next fixed frame 1101, and so on. When there is already a processed metal workpiece on the next fixed frame 1101, the operator needs to unload the workpiece first and then load it.

[0064] As the metal workpiece is inserted into the first processing frame 301 and continues to move out of the first processing frame 301, the rotation of the rotating shaft 318 drives the first gear 320 to drive the second gears 321 to rotate simultaneously. This, combined with the second limiting groove 323 at the top of the connecting shaft 322, drives the filter frame 306 on the limiting rod 4 to rotate simultaneously within the first and second processing frames 301 and 302, and also drives the guide frame 310 to rotate within the third processing frame 303. Under the continuous rotation of the filter frame 306, the support rods 307 drive the cleaning brushes 308 to rotate. Combined with the clean water in the first processing frame 301, this cleans the outer surface of the metal workpiece. Then, under the continued rotation of the turntable 6, it can move upward with the guide groove 8 and get off the first processing frame 301. Then the turntable 6 rotates smoothly. At this time, under the rotation of the rotating shaft 318, the transmission shaft 15 can be driven to rotate stably in the heat insulation frame 12 through the limiting rod 4 and the third limiting groove 16. At this time, under the rotation of the transmission shaft 15, the exhaust fan 20 on each driven shaft 19 can be driven to rotate simultaneously through the meshing drive of the third gear 17 and the fourth gear 18. With the corresponding heating element 22, the surrounding air can be heated and the hot air can be delivered downward through the second filter plate 14, so as to carry out a comprehensive and efficient drying process on the metal workpiece that has been cleaned and gotten off the first processing frame 301.

[0065] After cleaning, the metal workpiece, under the continued rotation of the turntable 6, is automatically inserted into the second processing frame 302 by the guide rod 7 and guide groove 8. Similarly, as the metal workpiece is inserted into the second processing frame 302 and continues to move out of the second processing frame 302, the pickling agent inside the second processing frame 302, combined with the continuous rotation of the filter frame 306 and the various cleaning brushes 308, can pickle the outer surface of the metal workpiece to remove oxides from the metal surface, which helps to ensure that the passivation coating can be evenly attached to the metal surface. Similarly, after pickling, the metal workpiece moves out of the second processing frame 302 and moves towards the third processing frame 303. During the movement, the pickled metal workpiece is automatically dried, and then it can be automatically inserted into the third processing frame 303.

[0066] During the process of inserting the pickled metal workpiece into the third processing frame 303, the rotation of the second gear 321, through the second limiting groove 323 on the connecting shaft 322, drives the guide frame 310 on the limiting block 309 to rotate continuously within the third processing frame 303. The rotation of the guide frame 310 drives the guide ring 312 and each nozzle 311 to rotate stably. Since the sealing plate 313 is rotatably connected to the top of the guide ring 312 via a bearing, the sealing plate 313 connected to the delivery pipe 314 does not rotate during the rotation of the guide ring 312. At this time, driven by the water pump 315, the paint in the storage tank 316 is drawn and delivered to the guide ring 312 through the delivery pipe 314, and then transported through the guide frame 310. At each nozzle 311, the rotation of each nozzle 311 enables a comprehensive and uniform spraying treatment of the metal workpiece, so that the passivation coating is evenly coated on the outer surface of the metal workpiece, increasing the corrosion resistance of the metal surface, extending the service life of the metal product, and improving its appearance. Moreover, during the operation of the device, the rotating shaft 318 can drive each stirring rod 319 to rotate at a uniform speed in the liquid storage tank 316, continuously stirring the coating in the liquid storage tank 316, avoiding the precipitation or clumping of the coating during storage, which would affect the stability of subsequent spraying work. The sprayed metal workpiece can continue to move with the turntable 6 and undergo drying treatment. The sprayed metal workpiece can also move to the door panel 23, making it convenient for the staff to unload it.

[0067] After the device finishes operating, the operator can open the solenoid valve 305 on the drain pipe 304. At this time, the used clean water in the first treatment frame 301 and the used pickling agent in the second treatment frame 302 can be discharged stably. The used clean water and pickling agent are filtered by the filter screen frame 306, ensuring their reuse. Excess paint in the third treatment frame 303 is also discharged through the drain pipe 304 for easy recycling. Then, the operator can open the hydraulic rod 10 on the device housing 2. Driven by the hydraulic rod 10, the mounting frame 9 moves upwards, and the drive shaft 15 can then move upwards. The upper movement disengages from the limiting rod 4, and the mounting frame 9 can move upwards to detach from the device housing 2. Subsequently, the operator can pull the filter frame 306 upwards by holding the support rod 307, so that the filter frame 306 moves away from the first processing frame 301 or the second processing frame 302, thereby facilitating the disassembly of the filter frame 306 and enabling the transfer and processing of the filtered and collected impurities. Similarly, after disassembly and cleaning, the filter frame 306 can be placed back into the first processing frame 301 and the second processing frame 302, and the limiting block 309 at the bottom of the filter frame 306 can be inserted into the second limiting groove 323 at the top of the connecting shaft 322 to complete the snap-fit ​​installation of the filter frame 306 and ensure its subsequent stable working state.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic surface coating and passivation device, characterized in that, The device includes a support base, a turntable, a mounting frame, and a limiting rod suitable for being driven to rotate. A device housing is fixedly connected to the top of the support base, and an integrated processing component is installed inside the device housing. The turntable is inserted into the limiting rod, and the turntable is adapted to be circumferentially limited by the limiting rod to drive circumferential rotation and axial movement on the limiting rod. A guide groove is provided on the mounting frame, and a guide rod is fixedly connected to the side end of the turntable. The guide rod is slidably connected within the guide groove, and the guide groove and guide rod cooperate to allow the turntable to rotate intermittently. The intermittent movement consists of moving upwards to the top of the mounting frame, rotating circumferentially at the top, and then moving downwards to the bottom. A hydraulic rod is installed on the top side end of the mounting frame. The bottom end is fixed to the side end of the device housing. Multiple workpiece clamping assemblies are installed on the turntable. The device housing is provided with loading and unloading stations. The device housing is equipped with door panels corresponding to the loading and unloading stations and adapted to be opened to place metal workpieces inside. The integrated processing assembly includes a first processing frame, a second processing frame, and a third processing frame corresponding to the cleaning station, pickling station, and passivation station, respectively. The first processing frame, the second processing frame, and the third processing frame are all fixedly connected to the bottom surface inside the device housing. Drainage pipes are connected to the first processing frame, the second processing frame, and the third processing frame. Solenoid valves are installed on the drainage pipes. Filter frames are rotatably connected inside the first processing frame and the second processing frame. Support rods are fixedly connected inside the filter frames. Cleaning brushes are fixedly connected to the support rods.A flow guide frame is rotatably connected within the third processing frame. A flow guide channel is installed within the flow guide frame, and a nozzle communicating with the flow guide channel is mounted on the flow guide frame. A flow guide ring communicating with the flow guide channel is connected to the top of the flow guide frame, and a sealing plate is connected to the top of the flow guide ring. The flow guide ring is adapted to rotate relative to the sealing plate. A delivery pipe suitable for supplying passivation coating is connected to the sealing plate. The turntable is adapted to be driven to rotate so that the corresponding workpiece clamping assembly corresponds to the loading / unloading station, cleaning station, pickling station, and passivation station. The workpiece clamped on the workpiece clamping assembly on the turntable is adapted to enter the corresponding filter frame or the flow guide frame during the axial movement of the turntable. A servo motor is mounted on the bottom surface of the support base, and a rotating shaft is connected to the output end of the servo motor. The top end of the rotating shaft is fixedly connected to the bottom end of the limiting rod, and a first gear is fixedly connected to the rotating shaft. The bottom of the device housing is rotatably connected to three connecting shafts, two of which are connected to corresponding filter frames, and the remaining connecting shaft is connected to a flow guide frame. Each connecting shaft is fixedly connected to a second gear. The workpiece clamping assembly includes a fixed frame, which is fixedly connected to the bottom surface of the turntable. A bidirectional threaded rod is rotatably connected inside the fixed frame, and a spiral spring is fixedly connected to the bidirectional threaded rod. The outer end of the spiral spring is fixedly connected to a limiting frame, which is also fixedly connected to the fixed frame. A coil and a connecting disc are fixedly connected to the bidirectional threaded rod, and a traction rope is wound around the coil. A heat insulation frame is fixedly connected to the top of the mounting frame, and a first filter plate is fixedly connected to the top of the heat insulation frame. A second filter plate is fixedly connected to the bottom of the heat insulation frame. A driven shaft is rotatably connected to the first and second filter plates. A heating element is installed above the second filter plate.

2. The automatic coating and passivation surface spraying device according to claim 1, characterized in that: The guide groove includes a guide groove group continuously arranged in the circumferential direction. The guide groove group includes a first inclined groove, a circumferential flat groove and a second inclined groove. The upper end of the first inclined groove is connected to one end of the circumferential flat groove, the other end of the circumferential flat groove is connected to the upper end of the second inclined groove, and the lower end of the second inclined groove is connected to the lower end of the first inclined groove of the adjacent guide groove group.

3. The automatic coating and passivation surface spraying device according to claim 1, characterized in that: The second gear meshes with the first gear, and the filter frame and the guide frame are adapted to be driven to rotate when the rotating shaft rotates.

4. The automatic coating and passivation surface spraying device according to claim 3, characterized in that: Limiting blocks are fixedly connected to the bottom end face of the filter frame and the bottom end face of the flow guide. The limiting blocks are respectively fixed to the bottom center of the filter frame and the bottom center of the flow guide. A second limiting groove is opened at the top end of the connecting shaft, and the limiting block is engaged in the second limiting groove of the corresponding connecting shaft.

5. The automatic coating and passivation surface spraying device according to claim 3, characterized in that: The device housing contains a liquid storage tank, the other end of the delivery pipe is connected to the liquid storage tank, a water pump is connected to the delivery pipe, at least a portion of the rotating shaft passes through the liquid storage tank, and a stirring rod is fixedly connected to the portion of the rotating shaft inside the liquid storage tank.

6. The automatic coating and passivation surface spraying device according to claim 1, characterized in that: A first limiting groove is formed through the turntable, and a limiting rod is slidably connected within the first limiting groove. The cross-sections of the limiting rod, the first limiting groove, and the third limiting groove are all rectangular. The diameter of the mounting frame is equal to the diameter of the device housing. The top surface of the device housing is in contact with the bottom surface of the mounting frame. The hydraulic rods are symmetrically distributed on both sides of the top of the mounting frame. The diameter of the turntable is smaller than the inner diameter of the mounting frame.

7. The automatic coating and passivation surface spraying device according to claim 1, characterized in that: The fixed frames are distributed at equal angles on the bottom surface of the turntable. Each fixed frame corresponds to a bidirectional threaded rod. A clamping plate is threaded onto the bidirectional threaded rod. A positioning plate is fixedly connected to the clamping plate. The clamping plate is slidably connected within the fixed frame. The clamping plates are symmetrically distributed on both sides of the bidirectional threaded rod. The positioning plates are symmetrically distributed on both sides of the clamping plate. The positioning plate is a right-angled triangle.

8. The automatic coating and passivation surface spraying device according to claim 7, characterized in that: A baffle is rotatably connected to the connecting plate, and a return spring is fixedly connected to the baffle. The other end of the return spring is fixedly connected to the connecting plate. A connecting spring is fixedly connected to the side end of the fixed frame, and a connecting rod is fixedly connected to the other end of the connecting spring. The connecting rod is slidably connected within the fixed frame. The baffles are evenly distributed on the connecting plate, and each baffle corresponds to a return spring. The width of the baffle is less than the length of the connecting rod.

9. The automatic coating and passivation surface spraying device according to claim 1, characterized in that: A drive shaft is rotatably connected inside the insulation frame. A third limiting groove is provided at the bottom end of the drive shaft. The top end of the limiting rod is engaged in the third limiting groove. A third gear is fixedly connected to the drive shaft. A fourth gear is fixedly connected to the driven shaft. The third gear and the fourth gear are meshed together. An exhaust fan located above the heating element and a scraper rod located above the first filter plate, adapted to rotate to scrape debris on the first filter plate, are fixedly connected to the driven shaft.

10. An automatic surface coating and passivation device according to claim 9, characterized in that: The top surface of the first filter plate, the bottom surface of the scraper, and the top surface of the insulation frame are flush. The length of the scraper is greater than the diameter of the first filter plate. The bottom surface of the insulation frame, the bottom surface of the second filter plate, and the inner top surface of the support base are flush.

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