A spraying device for metal parts of frame structure

Abstract

The present invention relates to the technical field of metal parts spraying, and specifically to a spraying device for metal parts of a frame structure, comprising a shell and a conveying unit; a grinding unit, a cleaning unit and a spraying unit are sequentially arranged in the shell along the conveying direction of the conveying unit, the shell part with the grinding unit forms a grinding chamber, the shell part with the spraying unit forms a spraying chamber, the cleaning unit comprises a cleaning chamber, the cleaning chamber is a concave tubular structure, the cleaning chamber contains cleaning liquid, there are openings at both ends of the upper part of the cleaning chamber, and the two openings have the same height, the two openings are arranged along the extension direction of the shell, the two openings are respectively connected to the grinding chamber and the spraying chamber, and the height of the lowest position of the cleaning chamber is lower than the height of the two openings of the cleaning chamber. The liquid level of the cleaning liquid in the cleaning chamber is the same as the opening height, and the cleaning chamber filled with cleaning liquid separates the grinding chamber and the spraying chamber. The present invention improves the quality of spraying.

Description

Technical Field

[0001] The invention relates to the technical field of metal parts spraying, and in particular to a spraying device for metal parts of a frame structure. Background Art

[0002] In the production and processing of many metal parts, spraying is an indispensable process. When spraying different coatings, the requirements for spraying equipment are also different. For example, when spraying anti-corrosion coatings, it is necessary to avoid contact between metal parts and the outside air, otherwise the surface of the metal parts will oxidize and rust, which will lead to a decrease in the anti-corrosion performance of the metal parts.

[0003] Chinese patent application CN114950825A discloses a production line for spraying internal and external anti-corrosion coatings on cast iron pipes, including a grinding mechanism, one side of which is connected in sequence with a cleaning mechanism, a drying mechanism, and a spraying mechanism, and a transmission mechanism is arranged between each of the cleaning mechanism, the drying mechanism, and the spraying mechanism; the grinding mechanism includes a grinding workbench, a No. 1 fixed plate is fixed to the upper end of the grinding workbench by welding, a No. 1 clamping seat is rotatably mounted on the surface of the No. 1 fixed plate, a No. 1 motor is fixedly mounted on the surface of the No. 1 fixed plate relative to one side of the No. 1 clamping seat, a No. 1 bracket is fixed to the upper end of the grinding workbench by welding, a grinding movable seat is arranged on one side of the No. 1 bracket, and the surface of the grinding movable seat is fixed A fixed rod is installed, and a grinding wheel is installed at the end of the fixed rod; the cleaning mechanism includes a cleaning workbench, and a cleaning movable seat is slidably connected to the upper end of the cleaning workbench, and the cleaning movable seat is connected to the cleaning workbench through a limit block, and an external spray pipe is installed on the surface of the cleaning movable seat, and an internal spray pipe is arranged below the external spray pipe, and nozzles are connected to the ends of the external spray pipe and the internal spray pipe; the drying mechanism includes a drying workbench, and a protective cover is fixed to the upper end of the drying workbench, and an active roller and a driven roller are arranged inside the protective cover, and a heat collecting cover is fixedly installed on the upper ends of the active roller and the driven roller, and a driving motor is installed on the top of the protective cover through a fixed seat, and a belt is connected to the output end of the driving motor.

[0004] The above scheme removes the rust layer of the metal parts by grinding, but during spraying, they are still in a state of interconnection with the outside world, that is, external oxygen and dust will still adhere to the metal parts, and the metal parts corresponding to the above scheme are tubular structures. If the structure of the metal parts is a frame structure, the traditional grinding method cannot be used to grind the frame structure metal parts. This is because the frame structure metal parts have many corners and are not easy to grind. In addition, the above scheme cannot prevent external dust from entering the spraying equipment during spraying, and even if a dust-free spraying workshop is used, it still needs to be placed in the dust-free spraying workshop after grinding, which can easily cause dust to mix into the dust-free workshop. Summary of the invention

[0005] In response to the above-mentioned problems, a spraying equipment for metal parts of frame structures is provided. A cleaning chamber is set up and cleaning liquid is injected into the cleaning chamber. The grinding chamber and the spraying chamber are separated by the cleaning chamber after the cleaning liquid is injected, so that the metal parts will not come into contact with external dust after being polished. At the same time, the air in the spraying chamber will not flow through, thereby ensuring the spraying effect of the metal parts.

[0006] To solve the problems of the prior art, the present invention provides a spraying device for metal parts of a frame structure, comprising a horizontally arranged shell and a conveying unit arranged in the shell along the extension direction of the shell; a grinding unit, a cleaning unit and a spraying unit are sequentially arranged in the shell along the conveying direction of the conveying unit, the shell part provided with the grinding unit forms a grinding chamber, the shell part provided with the spraying unit forms a spraying chamber, the cleaning unit comprises a cleaning chamber, the cleaning chamber is a concave tubular structure, the cleaning chamber contains cleaning liquid, there is an opening at each end of the upper part of the cleaning chamber, and the two openings have the same height, the two openings are arranged along the extension direction of the shell, the two openings are respectively communicated with the grinding chamber and the spraying chamber, the height of the lowest point of the cleaning chamber is lower than the height of the two openings of the cleaning chamber, the liquid level of the cleaning liquid in the cleaning chamber is the same as the height of the opening, and the cleaning chamber filled with cleaning liquid separates the grinding chamber and the spraying chamber.

[0007] Preferably, the end of the spray chamber away from the cleaning bin is an open opening, and an air dryer is provided on the side of the spray chamber close to the cleaning bin. The air dryer is fixedly arranged on the side wall of the spray chamber. The air dryer blows filtered hot air into the spray chamber, and the air flowing into the spray chamber forms an airflow at the open opening that flows from the cleaning bin toward the open opening.

[0008] Preferably, the conveying unit includes a hanger and a clamping frame. The hanger passes through the grinding chamber, the cleaning chamber and the spraying chamber in sequence along the conveying direction. The clamping frame is rotatably arranged on the hanger. An extension rod is vertically fixed on the upper part of the clamping frame. The extension rod vertically passes through the hanger and cooperates with the rotation of the hanger. A limit plate is fixed on the upper part of the extension rod, and the clamping frame only rotates in the grinding chamber.

[0009] Preferably, a rotating unit is provided in the grinding chamber, the rotating unit comprising a gear ring fixedly sleeved on the periphery of the limiting plate and a rack fixedly provided on the top of the grinding chamber, when the clamping frame moves to one side of the rack, the rack and the gear ring mesh with each other.

[0010] Preferably, a magnet is arranged at the top of the grinding cavity along the extension direction of the grinding cavity, and a plurality of locking rods are evenly arranged on the limit plate around the axis of the limit plate. The locking rod is slidably arranged on the limit plate along the vertical direction, and the magnet can attract the locking rod. A locking groove is opened on the hanger, and the locking groove and the locking rod correspond to each other, and the locking groove and the locking rod are plugged into each other.

[0011] Preferably, a lifting groove is vertically opened along the axis of the limiting plate at the upper part of the hanger, and a lifting plate is lifted and lowered in the lifting groove along the vertical direction. A plurality of rollers are evenly distributed on the lifting plate around the axis of the lifting plate, and the axes of the rollers are parallel to the radial direction of the lifting plate. A trigger unit for driving the lifting plate to move is provided on one side of the lifting groove. The lifting plate has an uppermost position and a lowermost position when moving in the vertical direction. When the lifting plate is at the highest position, the rollers roll in cooperation with the bottom of the limiting plate, and the bottom of the limiting plate is out of contact with the upper part of the hanger. When the lifting plate is at the lowest position, the rollers are out of contact with the bottom of the limiting plate, and the bottom of the limiting plate is in contact with the upper part of the hanger.

[0012] Preferably, the trigger unit includes a trigger slot interconnected with the lifting slot, the end of the trigger slot away from the lifting slot is a vertical structure and passes through the upper part of the hanger, a trigger block is provided on the vertical structure of the lifting slot for sliding in the vertical direction, a pressing bar is fixedly provided at the bottom of the rack, and the trigger block has a highest position and a lowest position on the vertical moving path. When the trigger block is at the highest position, the lifting plate is at the lowest position, and when the trigger block is at the lowest position, the lifting plate is at the highest position.

[0013] Preferably, a friction strip is fixedly provided on one end of the hanger close to the limiting plate.

[0014] Preferably, a water tank is provided on one side of the cleaning bin, cleaning liquid is stored in the water tank, a circulation pipe is provided on the water tank, a circulation pump draws out the cleaning liquid in the water tank and discharges it into the cleaning bin along the width direction of the cleaning bin, the water in the cleaning bin flows back to the water tank along the width direction of the cleaning bin, a filter plate is provided at the bottom of the cleaning bin, filter holes are opened on the filter plate, and the filter holes are funnel-shaped structures.

[0015] Preferably, the cross-section of the spray chamber in the vertical direction gradually increases from the cleaning chamber side to the open mouth side, an air purifier is arranged at the upper part of the spray chamber, and an extraction pipe is connected between the air purifier and the upper part of the open mouth.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. After the grinding unit completes the sandblasting and grinding of the metal parts, the clamping frame drives the metal parts to gradually descend. When the clamping frame is at the lowest position of the cleaning chamber, the clamping frame is completely immersed in the cleaning liquid. Since the metal frame is located below the clamping frame, the metal frame is also completely immersed in the cleaning liquid. The cleaning liquid in the cleaning chamber circulates along the width direction of the cleaning chamber, so that the metal debris and grinding gravel remaining on the metal frame can be cleaned off. Then the clamping frame drives the metal parts to gradually rise from the lowest position of the cleaning chamber. When the metal parts completely emerge from the cleaning liquid, an air dryer is set at the connection between the spray chamber and the cleaning chamber. The air dryer dries the lifted metal parts, and finally the air-dried metal parts enter the spray unit for spraying. Since the entrance of the spray unit is sealed by the cleaning liquid in the cleaning chamber, only one end of the spray chamber is open, and the open end refers to a point of the spray chamber away from the cleaning chamber. There is also an air dryer that injects filtered air into the spray chamber, forming an air flow from the cleaning chamber toward the open end in the spray chamber. In this way, outside air cannot enter the spray chamber, thereby enabling the spray unit to spray metal parts in a dust-free state, thereby improving the quality of spraying.

[0018] 2. By setting up a rotating unit, the clamping frame can be driven to rotate when the metal part passes through the grinding chamber without the need for additional energy drive, thereby reducing energy consumption. At the same time, the grinding grit sprayed by the grinding unit can more comprehensively contact the surface of the metal part. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of a spraying device for metal parts of a frame structure.

[0020] Figure 2 A side view of a spraying device for metal parts of a frame structure.

[0021] Figure 3 It is a spraying equipment for metal parts of frame structures. Figure 2 Schematic cross-sectional view at AA in the middle.

[0022] Figure 4 The invention is a cutaway stereoscopic schematic diagram of a spraying device for metal parts of a frame structure, with the direction of water flow in a cleaning chamber marked.

[0023] Figure 5 It is a spraying equipment for metal parts of frame structures. Figure 4 A local enlarged schematic diagram of point B in the middle.

[0024] Figure 6 A three-dimensional schematic diagram of a spraying device for frame structure metal parts after removing the shell, grinding unit, cleaning unit and spraying unit Figure 1 .

[0025] Figure 7 A three-dimensional schematic diagram of a spraying device for frame structure metal parts after removing the shell, grinding unit, cleaning unit and spraying unit Figure 2 .

[0026] Figure 8 It is a spraying equipment for metal parts of frame structures. Figure 7 A partial enlarged schematic diagram of point C in the middle.

[0027] Fig. 9 The invention is a cutaway stereoscopic schematic diagram of a spraying device for frame structure metal parts with a shell, a grinding unit, a cleaning unit and a spraying unit removed.

[0028] Fig.10 It is a spraying equipment for metal parts of frame structures. Fig. 9 A partial enlarged schematic diagram of point D in the middle.

[0029] The numbers in the figure are:

[0030] 1. Shell; 11. Grinding chamber; 12. Spraying chamber; 13. Rotating unit; 131. Rack; 132. Gear ring; 133. Magnet; 134. Locking rod; 135. Locking groove; 136. Lifting plate; 1361. Roller; 137. Trigger unit; 1371. Trigger groove; 1372. Trigger block; 1373. Pressing strip; 138. Lifting groove; 139. Friction strip; 2. Conveying unit; 21. Conveying rail; 22. Clamping frame; 23. Hanger; 24. Extension rod; 25. Limiting plate; 3. Metal parts; 4. Grinding unit; 5. Cleaning unit; 51. Cleaning chamber; 52. Circulation pump; 53. Water tank; 54. Filter plate; 6. Spraying unit; 7. Air dryer; 8. Air purifier; 81. Extraction tube. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figure 1-Figure 4: A spraying device for metal parts of a frame structure, comprising a horizontally arranged shell 1 and a conveying unit 2 arranged in the shell 1 along the extension direction of the shell 1; a grinding unit 4, a cleaning unit and a spraying unit 6 are sequentially arranged in the shell 1 along the conveying direction of the conveying unit 2, the shell 1 part provided with the grinding unit 4 forms a grinding chamber 11, the shell 1 part provided with the spraying unit 6 forms a spraying chamber 12, the cleaning unit comprises a cleaning chamber 51, the cleaning chamber 51 is a concave tubular structure, the cleaning chamber 51 is filled with cleaning liquid, there is an opening at each end of the upper part of the cleaning chamber 51, and the two openings have the same height, the two openings are arranged along the extension direction of the shell 1, the two openings are respectively communicated with the grinding chamber 11 and the spraying chamber 12, the height of the lowest point of the cleaning chamber 51 is lower than the height of the two openings of the cleaning chamber 51, the liquid level of the cleaning liquid in the cleaning chamber 51 is the same as the opening height, and the cleaning chamber 51 filled with cleaning liquid separates the grinding chamber 11 and the spraying chamber 12.

[0033] The metal part to be sprayed in the present invention is a frame structure. In the traditional spraying operation, before the spraying unit 6 sprays the metal part 3, the metal part 3 needs to be rust-removed, that is, the metal part 3 is polished by the polishing unit 4, but usually the polishing unit 4 and the spraying unit 6 need to be set separately. This is because when the polishing unit 4 polishes the surface of the metal part 3, the debris polished off the surface of the metal part 3 will splash, and metal debris will remain on the surface of the metal part 3 that has just been polished. In this way, the metal part 3 needs to be cleaned after polishing before spraying. However, in the above-mentioned polishing and cleaning processes, the polished metal part 3 needs to be transported, and external dust cannot be avoided during the transportation of the metal part 3. It will be adsorbed on the metal part 3, so that during the subsequent spraying, the sprayed paint cannot be smoothly adsorbed on the surface of the metal part 3, resulting in falling off. If the grinding unit 4, the cleaning unit 5 and the spraying unit 6 are directly combined, the metal debris splashed during the grinding of the grinding unit 4 or the metal debris splashed during the cleaning of the cleaning unit 5 will affect the spraying of the spraying unit 6, that is, the splashed debris may fly into the working area of ​​the spraying unit 6. At the same time, in order to ensure the effect of the nozzle, the spraying unit 6 needs to be sprayed in a dust-free environment. The traditional shell 1 is a straight long strip structure, and the air can circulate freely in the shell 1. In some production environments, there will be wind cross-winding inside the shell 1 with both ends open, causing a large amount of dust to flow into the shell 1.

[0034] In order to solve the above situation, the grinding unit 4, the cleaning unit 5 and the spraying unit 6 are redesigned. The specific structure is as follows: the conveying unit 2 includes a conveying rail 21, a clamping frame 22 and a hanger 23. The conveying rail 21 is fixedly arranged on the top of the shell 1. A plurality of hangers 23 are evenly arranged on the conveying rail 21 along the extension direction of the conveying rail 21. A plurality of clamping frames 22 are rotatably arranged at the bottom of the hanger 23. The clamping frame 22 is used to clamp the metal part 3. The top height of the grinding chamber 11 is the same as the top height of the spraying chamber 12, and the bottom height of the grinding chamber 11 is the same as the bottom height of the spraying chamber 12. The height of the cleaning chamber 51 at the lowest position is lower than the bottom height of the grinding chamber 11. The conveying rail 21 passes through the grinding chamber 11, the cleaning chamber 51 and the spraying chamber 12 in sequence. When the conveying rail 21 is in the grinding chamber 11, the conveying rail 21 is fixedly connected to the top of the grinding chamber 11. When the conveying rail 21 is located in the cleaning chamber 51, the conveying rail 21 is fixedly connected to the top of the cleaning chamber 51. When the conveying rail 21 is located in the spraying chamber 12, the conveying rail 21 is fixedly connected to the top of the spraying chamber 12. The spraying unit 6 includes a plurality of spray nozzles, and the spray nozzles are evenly distributed on the side walls of the spraying chamber 12.

[0035] The entire spraying process of the metal part 3 is as follows. Driven by the conveying rail 21, the metal part 3 clamped by the clamping frame 22 needs to pass through the grinding unit 4, the cleaning unit 5 and the spraying unit 6 in sequence. The grinding unit 4 adopts sandblasting for grinding. The grinding unit 4 includes multiple grinding nozzles, which are evenly distributed on the side walls of the grinding chamber 11. When the clamping frame 22 clamps the metal part 3 and passes through the grinding chamber 11, the grinding nozzle sprays out grinding grit. When the grinding unit 4 is in the grinding state, some grinding grit and metal debris will splash. Since the cleaning chamber 51 is full of cleaning liquid, the splashed grinding grit and metal debris will fall into the cleaning chamber 51 and be decelerated by the cleaning liquid received in the cleaning chamber 51. Finally, the grinding grit and metal debris sink to the bottom of the cleaning chamber 51, and the metal debris and grinding grit cannot enter the spraying chamber 12 through the cleaning chamber 51. After the grinding, the metal part 3 is driven by the clamping frame 22 to move to the cleaning chamber 51 along the extension direction of the conveying rail 21. In the process of moving from the grinding chamber 11 to the cleaning chamber 51, the clamping frame 22 drives the metal part 3 to gradually descend. When the clamping frame 22 is located at the lowest position of the cleaning chamber 51, the clamping frame 22 is completely immersed in the cleaning liquid. Since the metal frame is located below the clamping frame 22, the metal frame is also completely immersed in the cleaning liquid. The cleaning liquid in the cleaning chamber 51 circulates along the width direction of the cleaning chamber 51, so that the metal debris and grinding gravel remaining on the metal frame can be cleaned off. Then the clamping frame 22 drives the metal part 3 to gradually rise from the lowest position of the cleaning chamber 51. When the metal part 3 completely emerges from the cleaning liquid, an air dryer 7 is provided at the connection between the spray chamber 12 and the cleaning chamber 51. The air dryer 7 dries the lifted metal part 3. Finally, the air-dried metal part 3 enters the spray unit 6 for spraying. Since the entrance of the spray unit 6 is sealed by the cleaning liquid filled in the cleaning chamber 51, only one end of the spray chamber 12 is open, and the open end refers to a point of the spray chamber 12 away from the cleaning chamber 51, and there is an air dryer 7 to inject filtered air into the spray chamber 12, and an air flow from the cleaning chamber 51 toward the open end is formed in the spray chamber 12, so that the outside air cannot enter the spray chamber 12, thereby realizing that the spray unit 6 can spray the metal part 3 in a dust-free state, thereby improving the quality of the spraying.

[0036] Reference Figure 3 : The end of the spray chamber 12 away from the cleaning chamber 51 is an open mouth, and an air dryer 7 is arranged on the side of the spray chamber 12 close to the cleaning chamber 51. The air dryer 7 is fixedly arranged on the side wall of the spray chamber 12. The air dryer 7 blows filtered hot air into the spray chamber 12, and the air flowing into the spray chamber 12 forms an airflow at the open mouth that flows from the cleaning chamber 51 toward the open mouth.

[0037] Since the air in the spray chamber 12 flows from the inside to the outside, the outside air cannot flow into the spray chamber 12 , and further cannot bring dust into the spray chamber 12 , thereby achieving a dust-free space in the spray chamber 12 .

[0038] Reference Figure 6 and Fig.10 : The conveying unit 2 includes a hanger 23 and a clamping frame 22. The hanger 23 passes through the grinding chamber 11, the cleaning chamber 51 and the spraying chamber 12 in sequence along the conveying direction. The clamping frame 22 is rotatably set on the hanger 23. An extension rod 24 is vertically fixed on the upper part of the clamping frame 22. The extension rod 24 vertically penetrates the hanger 23 and rotates with the hanger 23. A limit plate 25 is fixed on the upper part of the extension rod 24. The clamping frame 22 only rotates in the grinding chamber 11.

[0039] The limiting plate 25 disposed on the upper part of the extension rod 24 can limit the upper part of the extension rod 24 to prevent the clamping frame 22 from falling. When the clamping frame 22 rotates, the clamping frame 22 rotates around the axis of the extension rod 24.

[0040] Reference Figure 7 and Figure 8 : A rotating unit 13 is arranged in the grinding chamber 11, and the rotating unit 13 includes a gear ring 132 fixedly sleeved on the periphery of the limiting plate 25 and a rack 131 fixedly arranged on the top of the grinding chamber 11. When the clamping frame 22 moves to one side of the rack 131, the rack 131 and the gear ring 132 are meshed with each other.

[0041] When the clamping frame 22 passes through the rack 131, the toothed ring 132 arranged on the periphery of the limiting plate 25 facilitates the engagement of the rack 131 with each other. As the hanger 23 drives the clamping frame 22 to continue to move, the toothed ring 132 rolls on the rack 131, so that the toothed ring 132 can drive the clamping frame 22 to rotate.

[0042] Reference Fig. 9 and Fig.10 : A magnet 133 is arranged at the top of the grinding chamber 11 along the extension direction of the grinding chamber 11, and a plurality of locking rods 134 are evenly arranged on the limit plate 25 around the axis of the limit plate 25. The locking rod 134 is slidably arranged on the limit plate 25 along the vertical direction. The magnet 133 is used to attract the locking rod 134. A locking groove 135 is opened on the hanger 23. The locking groove 135 corresponds to the locking rod 134, and the locking groove 135 and the locking rod 134 are plugged into each other.

[0043] When the clamping frame 22 enters the grinding chamber 11 but has not reached under the magnet 133, the locking rod 134 is inserted into the locking groove 135. At this time, the limit plate 25 cannot rotate, and the clamping frame 22 set on the hanger 23 cannot rotate. When the clamping frame 22 passes under the magnet 133, the magnet 133 attracts the locking rod 134 on the limit plate 25, causing the locking rod 134 to slide out of the locking groove 135, so that the limit plate 25 and the hanger 23 can be unlocked, so that the limit plate 25 can rotate relative to the hanger 23, so that the grinding nozzle in the grinding unit 4 can grind the surface of the metal part 3 more comprehensively. After the grinding is completed, the clamping frame 22 still moves along the horizontal extension direction of the grinding chamber 11. This is because the locking rod 134 has not yet locked with the locking groove 135. When the clamping frame 22 completely passes the magnet 133, the locking rod 134 loses the adsorption of the magnet 133, and the locking rod 134 falls on the hanger 23 under the action of gravity. It is worth noting that the locking rod 134 cannot be directly inserted into the locking groove 135 at this time. At this time, the toothed ring 132 and the rack 131 are still in meshing state. As the clamping frame 22 continues to The toothed ring 132 moves, and the toothed ring 132 continues to rotate under the action of the rack 131, and the toothed ring 132 drives the limit plate 25 to rotate, so that the locking rod 134 set on the limit plate 25 slides to the upper part of the locking groove 135 and engages with the locking groove 135, and at the same time, the toothed ring 132 and the rack 131 are also disengaged. Since the size of the toothed ring 132 and the length of the rack 131 remain unchanged, it can be ensured that when the locking rod 134 is inserted into the locking groove 135, the toothed ring 132 can just be disengaged from the rack 131.

[0044] Reference Figure 5 A lifting groove 138 is vertically provided on the upper part of the hanger 23 along the axis of the limiting plate 25, and a lifting plate 136 is lifted and lowered in the lifting groove 138 along the vertical direction. A plurality of rollers 1361 are evenly distributed on the lifting plate 136 around the axis of the lifting plate 136, and the axis of the roller 1361 is parallel to the radial direction of the lifting plate 136. A trigger unit 137 for driving the lifting plate 136 to move is provided on one side of the lifting groove 138. The lifting plate 136 has a highest position and a lowest position when moving in the vertical direction. When the lifting plate 136 is at the highest position, the roller 1361 rolls with the bottom of the limiting plate 25, and the bottom of the limiting plate 25 is out of contact with the upper part of the hanger 23. When the lifting plate 136 is at the lowest position, the roller 1361 is out of contact with the bottom of the limiting plate 25, and the bottom of the limiting plate 25 is in contact with the upper part of the hanger 23.

[0045] When the locking rod 134 slides out of the locking groove 135, the hanger 23 and the clamping frame 22 can rotate relative to each other under the action of external force. If the lifting plate 136 and the roller 1361 are not provided, when the rotating frame rotates, the bottom of the limit plate 25 is in direct contact with the hanger 23, and the friction force is relatively large. In this way, after long-term use, the contact end surfaces of the limit plate 25 and the hanger 23 are greatly worn. In order to extend the service life of the limit plate 25 and the hanger 23, a lifting plate 136 that can be lifted and lowered in the vertical direction is provided on the upper part of the hanger 23, and a roller 1361 is provided on the lifting plate 136. When the locking rod 134 slides out of the locking groove 135, the trigger unit 137 is triggered. The lifting plate 136 in the lifting groove 138 gradually rises, and the roller 1361 on the lifting plate 136 contacts the bottom of the limiting plate 25 when the gear ring 132 contacts and meshes with the rack 131. Then the lifting plate 136 continues to rise, and the lifting plate 136 lifts the limiting plate 25 through the roller 1361. After the bottom of the limiting plate 25 contacts the roller 1361, the limiting plate 25 no longer needs to contact the upper part of the hanger 23, and the friction resistance of the limiting plate 25 during rotation is greatly reduced, thereby extending the service life of the limiting plate 25 and the hanger 23.

[0046] Reference Fig.10 The trigger unit 137 includes a trigger slot 1371 interconnected with the lifting slot 138, the end of the trigger slot 1371 away from the lifting slot 138 is a vertical structure and passes through the upper part of the hanger 23, a trigger block 1372 is slidably arranged on the vertical structure of the lifting slot 138 along the vertical direction, and a pressing bar 1373 is fixedly arranged at the bottom of the rack 131, and the trigger block 1372 has a highest position and a lowest position on the vertical moving path. When the trigger block 1372 is at the highest position, the lifting plate 136 is at the lowest position. When the trigger block 1372 is at the lowest position, the lifting plate 136 is at the highest position.

[0047] After the magnet 133 unlocks the limit rod, as the clamping frame 22 moves, the pressing bar 1373 first triggers the trigger block 1372, and then the lifting plate 136 rises and makes the roller 1361 contact with the limit plate 25, and then the gear ring 132 and the rack 131 engage with each other.

[0048] Reference Figure 8 A friction strip 139 is fixedly arranged on one end of the hanger 23 close to the limiting plate 25.

[0049] Because the locking rod 134 is first unlocked under the action of the magnet 133, and then the pressing bar 1373 presses the trigger block 1372, so that the lifting plate 136 rises, and finally the gear ring 132 will mesh with the rack 131. Since the spatial positions of the gear ring 132 and the rack 131 are preset, and the locking rod 134 is unlocked, the gear ring 132 will not mesh with the rack 131 immediately, so it is necessary to avoid the clamping frame 22 from slightly rotating before the gear ring 132 and the rack 131 mesh, otherwise the gear ring 132 will not be able to mesh smoothly with the rack 131, so a friction strip 139 is set on the hanger 23 to increase the friction between the hanger 23 and the limit plate 25 before the lifting plate 136 is not raised. At the same time, after the grinding is completed, the magnet 133 first loses its attraction to the locking rod 134, and then the rack 131 and the pressing plate stop working at the same time, that is, the moment when the rack 131 and the toothed ring 132 are disengaged is the same as the moment when the pressing plate disengages from the trigger block 1372. Before the locking rod 134 falls back into the locking groove 135, the rotation of the limit plate 25 still has inertia because the toothed ring 132 and the rack 131 are just disengaged, which causes the limit plate 25 to rotate slightly. The friction strip 139 with a large friction force can slow down the inertia of the limit plate 25, avoiding the limit plate 25 from rotating slightly when it contacts the hanger 23, and ensuring that the locking rod 134 can slide smoothly into the locking groove 135.

[0050] Reference Figure 1 , Figure 3 and Figure 4 A water tank 53 is provided on one side of the cleaning bin 51, in which cleaning liquid is stored. A circulating pump 52 is provided on the water tank 53, and the circulating pump 52 draws the cleaning liquid in the water tank 53 and discharges it into the cleaning bin 51 along the width direction of the cleaning bin 51. The water in the cleaning bin 51 flows back to the water tank 53 along the width direction of the cleaning bin 51. A filter plate 54 is provided at the bottom of the cleaning bin 51, and filter holes are opened on the filter plate 54, which are funnel-shaped structures.

[0051] In this way, the grinding grit and metal debris cleaned from the metal part 3 can pass through the filter plate 54 and sink to the bottom of the cleaning chamber 51. At the same time, due to the shape of the filter holes, the water flowing on the upper part of the filter plate 54 is not easy to lift up the grinding grit and metal debris deposited on the lower part of the filter plate 54.

[0052] Reference Figure 3 and Figure 4 : The cross-section of the spray chamber 12 in the vertical direction gradually increases from the cleaning chamber 51 side to the open mouth side. An air purifier 8 is provided at the upper part of the spray chamber 12, and an extraction pipe 81 is connected between the air purifier 8 and the upper part of the open mouth.

[0053] By gradually increasing the cross-section of the spray chamber 12 in the vertical direction from the cleaning chamber 51 side to the open mouth side, the air flow rate in the spray chamber 12 becomes slower and slower, and the extraction pipe 81 arranged on the open mouth can suck part of the spray liquid floating out from the open mouth into the air purifier 8 for filtration, thereby ensuring the production environment.

[0054] Working principle: driven by the conveying rail 21, the metal part 3 clamped by the clamping frame 22 needs to pass through the grinding unit 4, the cleaning unit 5 and the spraying unit 6 in sequence. The grinding unit 4 adopts sandblasting for grinding. The grinding unit 4 includes multiple grinding nozzles, and the grinding nozzles are evenly distributed on the side walls of the grinding chamber 11. When the clamping frame 22 clamps the metal part 3 and passes through the grinding chamber 11, the grinding nozzle will spray out the grinding grit. When the grinding unit 4 is in the grinding state, some grinding grit and metal debris will splash. Since the cleaning chamber 51 is filled with cleaning liquid, the splashing grinding grit and metal debris will fall into the cleaning chamber 51 and be slowed down by the cleaning liquid received in the cleaning chamber 51. Finally, the grinding grit and metal debris sink to the bottom of the cleaning chamber 51. The metal debris and grinding grit cannot enter the spray chamber 12 through the cleaning chamber 51. The polished metal part 3 is driven by the clamping frame 22 along the extension direction of the conveying rail 21 to the cleaning chamber 51. In the process of moving from the polishing chamber 11 to the cleaning chamber 51, the clamping frame 22 drives the metal part 3 to gradually descend. When the clamping frame 22 is located at the lowest position of the cleaning chamber 51, the clamping frame 22 is completely immersed in the cleaning liquid. Since the metal frame is located below the clamping frame 22, the metal frame is also completely immersed in the cleaning liquid. The cleaning liquid in the cleaning chamber 51 circulates along the width direction of the cleaning chamber 51, so that the metal debris and grinding grit remaining on the metal frame can be cleaned. Then the clamping frame 22 drives the metal part 3 to gradually rise from the lowest position of the cleaning chamber 51. When the metal part 3 completely emerges from the cleaning liquid, an air dryer 7 is arranged at the connection between the spray chamber 12 and the cleaning chamber 51. The air dryer 7 dries the lifted metal part 3. Finally, the air-dried metal part 3 enters the spray unit 6 for spraying. Since the entrance of the spray unit 6 is sealed by the cleaning liquid filled in the cleaning chamber 51, only one end of the spray chamber 12 is open. The open mouth refers to a point where the spray chamber 12 is far away from the cleaning chamber 51. In addition, the air dryer 7 injects filtered air into the spray chamber 12, and an air flowing from the cleaning chamber 51 to the open mouth is formed in the spray chamber 12. In this way, the outside air cannot enter the spray chamber 12, thereby realizing that the spray unit 6 can spray the metal part 3 in a dust-free state, thereby improving the quality of the spraying.

[0055] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A spraying device for a metal part of a frame structure, comprising a horizontally arranged housing (1) and a conveying unit (2) arranged in the housing (1) along an extension direction of the housing (1); It is characterized in that A grinding unit (4), a cleaning unit and a spraying unit (6) are sequentially arranged in the shell (1) along the conveying direction of the conveying unit (2); the portion of the shell (1) provided with the grinding unit (4) forms a grinding chamber (11), and the portion of the shell (1) provided with the spraying unit (6) forms a spraying chamber (12); the cleaning unit comprises a cleaning chamber (51); the cleaning chamber (51) is a concave tubular structure; cleaning liquid is contained in the cleaning chamber (51); an opening is respectively provided at both ends of the upper portion of the cleaning chamber (51); the two openings have the same height; the two openings are arranged along the extension direction of the shell (1); the two openings are respectively connected to the grinding chamber (11) and the spraying chamber (12); the height of the lowest position of the cleaning chamber (51) is lower than the height of the two openings of the cleaning chamber (51); the liquid level of the cleaning liquid in the cleaning chamber (51) is the same as the height of the opening; the cleaning chamber (51) filled with cleaning liquid separates the grinding chamber (11) and the spraying chamber (12).

2. A spraying device for frame structure metal parts according to claim 1, characterized in that: One end of the spray chamber (12) away from the cleaning chamber (51) is an open opening. An air dryer (7) is arranged on the side of the spray chamber (12) close to the cleaning chamber (51). The air dryer (7) is fixedly arranged on the side wall of the spray chamber (12). The air dryer (7) blows filtered hot air into the spray chamber (12). The air flowing into the spray chamber (12) forms an airflow at the open opening that flows from the cleaning chamber (51) toward the open opening.

3. The spraying equipment for frame structure metal parts according to claim 1, characterized in that: The conveying unit (2) comprises a hanger (23) and a clamping frame (22). The hanger (23) passes through a grinding chamber (11), a cleaning chamber (51) and a spraying chamber (12) in sequence along a conveying direction. The clamping frame (22) is rotatably arranged on the hanger (23). An extension rod (24) is vertically fixedly arranged on the upper part of the clamping frame (22). The extension rod (24) vertically penetrates the hanger (23) and rotatably cooperates with the hanger (23). A limit plate (25) is fixedly arranged on the upper part of the extension rod (24). The clamping frame (22) rotates only in the grinding chamber (11).

4. The spraying equipment for frame structure metal parts according to claim 3, characterized in that: A rotating unit (13) is arranged in the grinding chamber (11), and the rotating unit (13) comprises a toothed ring (132) fixedly sleeved on the periphery of the limiting plate (25) and a rack (131) fixedly arranged on the top of the grinding chamber (11). When the clamping frame (22) moves to one side of the rack (131), the rack (131) and the toothed ring (132) mesh with each other.

5. The spraying equipment for frame structure metal parts according to claim 3, characterized in that: A magnet (133) is arranged at the top of the grinding cavity (11) along the extension direction of the grinding cavity (11), and a plurality of locking rods (134) are evenly arranged on the limit plate (25) around the axis of the limit plate (25). The locking rod (134) is slidably arranged on the limit plate (25) along the vertical direction. A locking groove (135) is provided on the hanger (23), and the locking groove (135) and the locking rod (134) correspond to each other. When the magnet (133) is located directly above the locking rod (134), the locking rod (134) rises to the highest position, and the locking groove (135) and the locking rod (134) are disengaged. When the magnet (133) and the locking rod (134) are staggered, the locking rod falls to the lowest position, and the locking groove (135) and the locking rod (134) are plugged and matched.

6. The spraying equipment for frame structure metal parts according to claim 4, characterized in that: A lifting groove (138) is vertically provided on the upper part of the hanger (23) along the axis of the limiting plate (25), a lifting plate (136) is vertically provided in the lifting groove (138), a plurality of rollers (1361) are evenly distributed on the lifting plate (136) around the axis of the lifting plate (136), the axis of the rollers (1361) is parallel to the radial direction of the lifting plate (136), and a trigger unit (1361) for driving the lifting plate (136) to move is provided on one side of the lifting groove (138). 137), the lifting plate (136) has a highest position and a lowest position when moving in the vertical direction. When the lifting plate (136) is at the highest position, the roller (1361) rolls with the bottom of the limiting plate (25), and the bottom of the limiting plate (25) is out of contact with the upper part of the hanger (23). When the lifting plate (136) is at the lowest position, the roller (1361) is out of contact with the bottom of the limiting plate (25), and the bottom of the limiting plate (25) is in contact with the upper part of the hanger (23).

7. The spraying equipment for frame structure metal parts according to claim 6, characterized in that: The trigger unit (137) comprises a trigger slot (1371) interconnected with the lifting slot (138); one end of the trigger slot (1371) away from the lifting slot (138) is in a vertical structure and passes through the upper part of the hanger (23); a trigger block (1372) is slidably arranged on the vertical structure of the lifting slot (138) along the vertical direction; a pressing bar (1373) is fixedly arranged at the bottom of the rack (131); the trigger block (1372) has a highest position and a lowest position on the vertical moving path; when the trigger block (1372) is at the highest position, the lifting plate (136) is at the lowest position; when the trigger block (1372) is at the lowest position, the lifting plate (136) is at the highest position.

8. The spraying equipment for frame structure metal parts according to claim 3, characterized in that: A friction strip (139) is fixedly arranged on one end of the hanger (23) close to the limiting plate (25).

9. The spraying equipment for frame structure metal parts according to claim 1, characterized in that: A water tank (53) is arranged on one side of the cleaning chamber (51), and cleaning liquid is stored in the water tank (53). A circulating pump (52) is arranged on the water tank (53), and the circulating pump (52) draws the cleaning liquid in the water tank (53) and discharges it into the cleaning chamber (51) along the width direction of the cleaning chamber (51), and the water in the cleaning chamber (51) flows back into the water tank (53) along the width direction of the cleaning chamber (51). A filter plate (54) is arranged at the bottom of the cleaning chamber (51), and filter holes are provided on the filter plate (54), and the filter holes are funnel-shaped structures.

10. The spraying equipment for frame structure metal parts according to claim 2, characterized in that: The cross-section of the spray chamber (12) in the vertical direction gradually increases from the side of the cleaning chamber (51) to the side of the open mouth. An air cleaner (8) is arranged at the upper part of the spray chamber (12), and an extraction pipe (81) is connected between the air cleaner (8) and the upper part of the open mouth.

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