Cleaning device for large aluminum casting before surface coating

Abstract

The invention discloses a cleaning device used before surface coating of a large aluminum casting, and belongs to the technical field of aluminum casting machining, the cleaning device comprises a main body module and a staggered cleaning module, the main body module comprises a bottom plate, the top of the bottom plate is fixedly connected with a mounting frame and a supporting table, and a clamping assembly is arranged in the mounting frame; the staggered cleaning module comprises an exchange liquid supply assembly connected to the top of the supporting table, a spraying assembly is arranged between the two sides of the inner wall of the mounting frame and connected with the exchange liquid supply assembly, and a connecting assembly is arranged on one side of the mounting frame and connected with the spraying assembly. Through the arrangement of the exchange liquid supply assembly, the connection assembly, the spraying assembly, the rolling assembly and the cleaning brush, the aluminum casting plate can be repeatedly brushed in a staggered mode through clear water and a cleaning agent through continuous work of the device, stubborn stains can be removed more conveniently, the cleaning requirement of the aluminum casting plate is met, and the cleaning effect of the aluminum casting plate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum casting processing, and more specifically to a cleaning device before coating the surface of a large aluminum casting. Background Art

[0002] Aluminum castings refer to equipment and devices made of pure aluminum or aluminum alloy obtained by casting. Aluminum castings need to be coated mainly to improve their corrosion resistance, wear resistance, decorativeness and to achieve some special functions. Therefore, some aluminum plates need to be cleaned during production and processing to prevent dust and impurities from affecting the coating quality.

[0003] According to the search, the patent number CN220760231U discloses a cooling and flushing device for the production and processing of metal materials, including a flushing workbench, a liquid guiding slope is arranged on the upper part of the flushing workbench, a metal workpiece is arranged on the surface of the liquid guiding slope, a flushing nozzle is arranged above the metal workpiece, and a water removal mechanism is arranged on the surface of the flushing workbench; through the provided water removal mechanism, during the movement of the flushing bracket, the water removal roller brush brushes along the surface of the metal workpiece to remove residual water to a great extent, thereby improving the cleaning quality of the metal material plate; through the provided liquid guiding slope, during the flushing process, the metal workpiece is placed on the liquid guiding slope, and the liquid guiding slope has a certain slope, and the cleaning liquid sprayed onto the surface of the metal workpiece will be self-directed along the slope, which can alleviate the situation of excessive residual liquid on the surface of the metal workpiece.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the current cleaning devices are usually in the above-mentioned state, and the cleaning of aluminum castings is achieved by flushing the aluminum castings. This flushing method is relatively simple. Although the prior art has a method of flushing combined with brushing to improve the effect, the stains on some plates are relatively stubborn, such as oil stains and glue stains accumulated for a long time. It is difficult to completely remove these stains by only washing with clean water. Usually, it is necessary to repeat the operation of using detergent and clean water during the cleaning process and then brushing to achieve the cleaning effect. However, it is not easy to achieve this operation in the prior art. For this reason, we propose a cleaning device for large aluminum castings before surface coating. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a large aluminum casting surface cleaning device before coating, which adopts the following technical solution: A pre-coating cleaning device for the surface of a large aluminum casting comprises a main body module and a staggered cleaning module, wherein the main body module comprises a base plate, a mounting frame and a support table are fixedly connected to the top of the base plate, a clamping assembly is arranged inside the mounting frame, the staggered cleaning module comprises an exchange liquid supply assembly connected to the top of the support table, a spraying assembly is arranged between the two sides of the inner wall of the mounting frame, the spraying assembly is connected to the exchange liquid supply assembly, a connecting assembly is arranged on one side of the mounting frame, the connecting assembly is connected to the exchange liquid supply assembly and the top of the base plate, a rolling assembly is arranged between the two sides of the inner wall of the mounting frame, a plurality of cleaning brushes are connected to the rolling assembly, the clamping assembly is located inside the rolling assembly, the spraying assembly is located above the rolling assembly, and the connecting assembly is connected to the rolling assembly.

[0006] Furthermore, the exchange liquid supply assembly includes a cleaning agent barrel and a clean water barrel fixedly connected to the top of the support platform, the outer surfaces of the cleaning agent barrel and the clean water barrel are connected to a connecting pipe, the outer surfaces of the two connecting pipes are provided with a water inlet check valve, the interiors of the cleaning agent barrel and the clean water barrel are movably connected to a piston plate, the tops of the two piston plates are fixedly connected to special-shaped connecting rods, and the two special-shaped connecting rods extend to the outside of the cleaning agent barrel and the clean water barrel respectively.

[0007] Furthermore, the spray assembly includes a second U-shaped tube, a first U-shaped tube and a third U-shaped tube fixedly connected between two sides of the inner wall of the mounting frame, the second U-shaped tube is located above the first U-shaped tube, and the outer surfaces of the second U-shaped tube and the first U-shaped tube are fixedly connected with multiple first nozzles, and the third U-shaped tube is located outside the first U-shaped tube, and the outer surface of the third U-shaped tube is fixedly connected with multiple second nozzles.

[0008] Furthermore, the spray assembly also includes a connecting pipe fixedly connected between the outer surfaces of the first U-shaped tube and the third U-shaped tube, a first connecting pipe is fixedly connected between the outer surface of the connecting pipe and the clean water bucket, a second connecting pipe is fixedly connected between the cleaning agent bucket and the second U-shaped tube, and a water outlet one-way valve is provided at a position near one end of the outer surface of the second connecting pipe and the first connecting pipe.

[0009] Furthermore, the connecting component includes a mounting base fixedly connected to the top of the base plate, the mounting base having a hollow arm movably connected inside, one side of the mounting base having two connecting gears rotatably connected thereto, the outer surfaces of the two connecting gears meshing with each other, one of the connecting gears being fixedly connected to the hollow arm, and the two special-shaped connecting rods being movably connected inside the hollow arm, and the outer surface of another one of the connecting gears being fixedly connected to a hollow bar.

[0010] Furthermore, the connecting assembly also includes a rotating shaft fixedly connected to one side of the mounting frame, one end of the rotating shaft is fixedly connected to a large gear, one side of the large gear is fixedly connected to a connecting shaft, the outer surface of the connecting shaft is movably connected to the inside of the hollow bar, and a small gear is connected to the rolling assembly, and the small gear is meshed with the large gear.

[0011] Furthermore, the plurality of first nozzles are all arranged at an inclination, the nozzles of the plurality of first nozzles are all directed toward the clamping assembly, and the nozzles of the plurality of second nozzles are all directed vertically downward.

[0012] Furthermore, the rolling assembly includes four rolling rods that are rotatably connected between the two sides of the inner wall of the mounting frame, the outer surfaces of the four rolling rods are fixedly connected to two sprockets, the outer surfaces of every two sprockets are transmission-connected with a chain, and the multiple cleaning brushes are respectively fixedly connected between the outer surfaces of two of the chains.

[0013] Furthermore, the rolling assembly also includes a first motor fixedly connected to the other side of the mounting frame, wherein one end of the two rolling rods is fixedly connected to a linkage gear, the two linkage gears are meshed with each other, one side of one of the linkage gears is fixedly connected to a pinion gear, and the output shaft of the first motor is fixedly connected to the other end of one of the rolling rods.

[0014] Furthermore, the clamping assembly includes a hollow block fixedly connected to the bottom of the inner wall of the mounting frame, a bidirectional screw is rotatably connected between the two sides of the inner wall of the hollow block, two displacement blocks are movably connected inside the hollow block, the interior of the two displacement blocks are threadedly connected to the outer surface of the bidirectional screw, the tops of the two displacement blocks are fixedly connected with a clamping plate, one side of the hollow block is fixedly connected to a second motor, and the output shaft of the second motor is fixedly connected to one end of the bidirectional screw.

[0015] In summary, the present invention includes the following beneficial technical effects: (1) The present invention exchanges the settings of the liquid supply component, the connection component, the spray component, the rolling component and the cleaning brush, so that the continuous operation of the device will repeatedly wash the aluminum casting plate with clean water and the cleaning agent alternately, making it easier to remove stubborn stains, meet the cleaning requirements of the aluminum casting plate, and improve the cleaning effect of the aluminum casting plate; (2) The present invention arranges the rolling rod, sprocket, linkage gear, chain and cleaning brush, so that the device can simultaneously clean both sides of the aluminum casting plate. Compared with the step-by-step single-side cleaning of the prior art, the cleaning efficiency is improved, making the cleaning process faster; (3) The present invention provides a bidirectional screw rod, a displacement block and a clamping plate, so that the device can be used to fix aluminum castings of different widths, thereby improving the applicability of the device and facilitating the use of more types of aluminum castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial structural schematic diagram of the spraying assembly and the connecting assembly of the present invention; Figure 3 It is a schematic cross-sectional view of the liquid exchange supply assembly of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a schematic structural diagram of the rolling assembly of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle; Figure 7 It is a schematic cross-sectional structural diagram of the clamping assembly of the present invention.

[0017] Description of the numbers in the figure: 100, main body module; 110, bottom plate; 120, mounting frame; 130, support platform; 140, clamping assembly; 141, hollow block; 142, displacement block; 143, bidirectional screw rod; 144, clamping plate; 145, second motor; 200, staggered cleaning module; 210, exchange liquid supply assembly; 211, cleaning agent barrel; 212, connecting pipe; 213, water inlet check valve; 214, piston plate; 215, special-shaped connecting rod; 216, clean water barrel; 220, connecting assembly; 221, mounting seat; 222, hollow arm; 223, connecting gear; 224, hollow bar; 225, rotating shaft; 226, large gear; 227, small gear; 228, connecting shaft; 23 0. Spraying assembly; 231. First U-shaped tube; 232. Second U-shaped tube; 233. First nozzle; 234. Third U-shaped tube; 235. Second nozzle; 236. Connecting tube; 237. First connecting tube; 238. Second connecting tube; 239. Water outlet one-way valve; 240. Rolling assembly; 241. Rolling rod; 242. Sprocket; 243. Chain; 244. First motor; 245. Linkage gear; 250. Cleaning brush. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The following is combined with Figure 1-7 The present invention is described in further detail.

[0022] See also Figure 1-7 A large aluminum casting surface cleaning device before coating, comprising a main body module 100 and a staggered cleaning module 200, the main body module 100 comprises a bottom plate 110, a mounting frame 120 and a support table 130 are fixedly connected to the top of the bottom plate 110, a clamping assembly 140 is arranged inside the mounting frame 120, the staggered cleaning module 200 comprises an exchange liquid supply assembly 210 connected to the top of the support table 130, a spray assembly 230 is arranged between the two sides of the inner wall of the mounting frame 120, and the spray assembly 230 Connected to the exchange liquid supply component 210, a connecting component 220 is set on one side of the mounting frame 120, the connecting component 220 is connected to the exchange liquid supply component 210 and the top of the base plate 110, a rolling component 240 is set between the two sides of the inner wall of the mounting frame 120, a plurality of cleaning brushes 250 are connected to the rolling component 240, the clamping component 140 is located inside the rolling component 240, the spraying component 230 is located above the rolling component 240, and the connecting component 220 is connected to the rolling component 240.

[0023] When in use, the staff will fix the aluminum casting plate to be cleaned through the clamping assembly 140, and then the staff will open the rolling assembly 240 to drive multiple cleaning brushes 250 to roll from top to bottom. At the same time, the rolling assembly 240 transmits the exchange liquid supply assembly 210 through the connecting assembly 220. The exchange liquid supply assembly 210 will first deliver the cleaning agent to the spray assembly 230, and at the same time, clean water enters the exchange liquid supply assembly 210. The cleaning agent is first sprayed on the aluminum casting plate through the spray assembly 230, and then rolled and scrubbed with the cleaning brush 250. After the cleaning agent is sprayed, the exchange liquid supply component 210 will automatically deliver clean water to the spray component 230, and the clean water will be sprayed out through the spray component 230. The spray component 230 cleans the aluminum casting plate and the cleaning brush 250. At this time, the cleaning agent enters the exchange liquid supply component 210. After the cleaning is completed, the exchange liquid supply component 210 again delivers the cleaning agent to the spray component 230, so as to brush the cleaning agent again. The continuous operation of the device will repeat the alternating brushing of clean water and cleaning agent on the aluminum casting plate, thereby improving the cleaning effect of the aluminum casting plate.

[0024] The exchange liquid supply assembly 210 includes a cleaning agent barrel 211 and a clean water barrel 216 fixedly connected to the top of the support platform 130, the outer surfaces of the cleaning agent barrel 211 and the clean water barrel 216 are connected to a connecting pipe 212, and the outer surfaces of the two connecting pipes 212 are provided with a water inlet check valve 213. The interiors of the cleaning agent barrel 211 and the clean water barrel 216 are movably connected to piston plates 214, and the tops of the two piston plates 214 are fixedly connected to special-shaped connecting rods 215, and the two special-shaped connecting rods 215 extend to the outside of the cleaning agent barrel 211 and the clean water barrel 216 respectively. The spray assembly 230 includes a second U fixedly connected between the two sides of the inner wall of the mounting frame 120 The spray assembly 230 further comprises a first U-shaped tube 232, a first U-shaped tube 231 and a third U-shaped tube 234, wherein the second U-shaped tube 232 is located above the first U-shaped tube 231, and the outer surfaces of the second U-shaped tube 232 and the first U-shaped tube 231 are fixedly connected with a plurality of first nozzles 233, the third U-shaped tube 234 is located outside the first U-shaped tube 231, and the outer surface of the third U-shaped tube 234 is fixedly connected with a plurality of second nozzles 235, the spray assembly 230 further comprises a connecting tube 236 fixedly connected between the outer surfaces of the first U-shaped tube 231 and the third U-shaped tube 234, and a first connecting tube 237 is fixedly connected between the outer surface of the connecting tube 236 and the clean water bucket 216, and the cleaning agent A second connecting pipe 238 is fixedly connected between the barrel 211 and the second U-shaped tube 232. A water outlet one-way valve 239 is provided on the outer surface of the second connecting pipe 238 and the first connecting pipe 237 near one end. The connecting assembly 220 includes a mounting seat 221 fixedly connected to the top of the bottom plate 110. The interior of the mounting seat 221 is movably connected to a hollow arm 222. One side of the mounting seat 221 is rotatably connected to two connecting gears 223. The outer surfaces of the two connecting gears 223 are meshed with each other, one of which is fixedly connected to the hollow arm 222. The two special-shaped connecting rods 215 are movably connected to the interior of the hollow arm 222. The outer surface of an outer connecting gear 223 is fixedly connected to a hollow bar 224, and the connecting component 220 also includes a rotating shaft 225 fixedly connected to one side of the mounting frame 120, one end of the rotating shaft 225 is fixedly connected to a large gear 226, and one side of the large gear 226 is fixedly connected to a connecting shaft 228, and the outer surface of the connecting shaft 228 is movably connected to the inside of the hollow bar 224, and a small gear 227 is connected to the rolling component 240, and the small gear 227 is meshed with the large gear 226. The multiple first nozzles 233 are all arranged at an angle, and the nozzles of the multiple first nozzles 233 are all facing the clamping component 140, and the nozzles of the multiple second nozzles 235 are all vertically downward.

[0025] The linkage gear 245 reduces the speed of the transmission of the large gear 226 through the small gear 227, and the large gear 226 will drive the connecting shaft 228 to move inside the hollow bar 224, so that one of the connecting gears 223 swings to transmit the other connecting gear 223, and the other connecting gear 223 will drive the hollow arm 222 to swing. While the hollow arm 222 swings, it will press one of the special-shaped connecting rods 215 and lift the other piston plate 214. The water inlet check valve 213 can only perform water inlet operation, while the water outlet check valve 239 can only perform water outlet operation. The two connecting pipes 212 are respectively connected to clean water and cleaning agent, so that the clean water inside the clean water bucket 216 will be pressed out through the first connecting pipe 237, and the cleaning agent will be drawn into the cleaning agent bucket 211 through the connecting pipe 212. The first connecting pipe 237 will connect the third U-shaped tube 234 and one of the second U-shaped tubes 23 through the connecting pipe 236. 2 is used to deliver water, so that clean water is sprayed out through the second nozzle 235 and the first nozzle 233, and the clean water will be sprayed to the aluminum casting plate and the cleaning brush 250 respectively, so as to wet the cleaning brush 250 and the aluminum casting plate. Subsequently, the hollow arm 222 will swing in the opposite direction, so that water enters the clean water bucket 216 through the connecting pipe 212, and the cleaning agent in the cleaning agent bucket 211 flows out through the second connecting pipe 238 and is sent to the inside of another second U-shaped tube 232. The cleaning agent is sprayed on the plate from top to bottom through the first nozzle 233, and the aluminum casting plate is brushed with the rolling cleaning brush 250. Subsequently, the hollow arm 222 swings in the opposite direction again, so that the aluminum casting plate and the cleaning brush 250 are sprayed with clean water again to wash away the cleaning agent on the aluminum casting plate and the cleaning brush 250, and then the cleaning agent is sprayed and cleaned again. The continuous operation of the device will repeat the staggered brushing of the aluminum casting plate with clean water and cleaning agent.

[0026] The rolling assembly 240 includes four rolling rods 241 that are rotatably connected between the two sides of the inner wall of the mounting frame 120, the outer surfaces of the four rolling rods 241 are fixedly connected to two sprockets 242, and the outer surfaces of every two sprockets 242 are transmission-connected with a chain 243, and a plurality of cleaning brushes 250 are respectively fixedly connected between the outer surfaces of two of the chains 243. The rolling assembly 240 also includes a first motor 244 fixedly connected to the other side of the mounting frame 120, wherein one end of the two rolling rods 241 is fixedly connected to a linkage gear 245, and the two linkage gears 245 are meshed with each other, and one side of one of the linkage gears 245 is fixedly connected to the pinion 227, and the output shaft of the first motor 244 is fixedly connected to the other end of one of the rolling rods 241.

[0027] Turn on the first motor 244, and the first motor 244 will drive the rolling rod 241. Through the engagement of two linkage gears 245, two of the rolling rods 241 rotate, and the two rolling rods 241 drive the four sprockets 242 to rotate, thereby transmitting the four chains 243 to roll and drive multiple cleaning brushes 250 to roll from top to bottom, thereby realizing double-sided synchronous brushing of the aluminum casting plate and improving the cleaning efficiency.

[0028] The clamping assembly 140 includes a hollow block 141 fixedly connected to the bottom of the inner wall of the mounting frame 120, a bidirectional screw rod 143 is rotatably connected between the two sides of the inner wall of the hollow block 141, two displacement blocks 142 are movably connected inside the hollow block 141, the interior of the two displacement blocks 142 are threadedly connected to the outer surface of the bidirectional screw rod 143, the tops of the two displacement blocks 142 are fixedly connected to a clamping plate 144, a second motor 145 is fixedly connected to one side of the hollow block 141, and the output shaft of the second motor 145 is fixedly connected to one end of the bidirectional screw rod 143.

[0029] The aluminum casting to be cleaned is placed between the two clamping plates 144, and then the second motor 145 is turned on. The second motor 145 will drive the bidirectional screw rod 143 to rotate, so that the two displacement blocks 142 are close to each other. The displacement blocks 142 will drive the two clamping plates 144 to be close to each other to fix the aluminum casting, so that the device can easily fix aluminum castings of different widths.

[0030] The implementation principle of the embodiment of the present invention is as follows: when in use, the staff will place the aluminum casting plate to be cleaned between the two clamping plates 144, and then turn on the second motor 145, the second motor 145 will drive the bidirectional screw rod 143 to rotate, so that the two displacement blocks 142 are close to each other, the displacement blocks 142 will drive the two clamping plates 144 to move closer to each other to fix the aluminum casting plate, and then the staff will turn on the first motor 244, the first motor 244 will drive the rolling rod 241, through the meshing of the two linkage gears 245, two of the rolling rods 241 are rotated, the two rolling rods 241 drive the four sprockets 242 to rotate, thereby transmitting The four chains 243 roll and drive the multiple cleaning brushes 250 to roll from top to bottom. At the same time, the linkage gear 245 reduces the speed of the large gear 226 through the small gear 227, and the large gear 226 will drive the connecting shaft 228 to move inside the hollow bar 224, so that one of the connecting gears 223 swings to drive another connecting gear 223, and the other connecting gear 223 will drive the hollow arm 222 to swing. While the hollow arm 222 swings, it will press one of the special-shaped connecting rods 215 and lift the other piston plate 214. The water inlet check valve 213 can only perform water inlet operation, while the water outlet check valve 239 can only perform water outlet operation. In the water discharge operation, the two connecting pipes 212 are connected to the clean water and the cleaning agent respectively, so that the clean water in the clean water bucket 216 will be pressed out through the first connecting pipe 237, and the cleaning agent will be drawn into the cleaning agent bucket 211 through the connecting pipe 212. The first connecting pipe 237 will send water to the third U-shaped tube 234 and one of the second U-shaped tubes 232 through the connecting pipe 236, so that the clean water is sprayed out through the second nozzle 235 and the first nozzle 233, and the clean water will be sprayed to the aluminum casting plate and the cleaning brush 250 respectively, so as to wet the cleaning brush 250 and the aluminum casting plate. Subsequently, the hollow arm 222 will swing in the opposite direction, so that the inside of the clean water bucket 216 passes through Water enters the connecting pipe 212, and the cleaning agent in the cleaning agent barrel 211 flows out through the second connecting pipe 238 and is sent into another second U-shaped tube 232. The cleaning agent is sprayed on the plate from top to bottom through the first nozzle 233, and the aluminum casting plate is brushed with the rolling cleaning brush 250. Subsequently, the hollow arm 222 swings in the opposite direction again, so that the aluminum casting plate and the cleaning brush 250 are sprayed with clean water again to wash away the cleaning agent on the aluminum casting plate and the cleaning brush 250, and then the cleaning agent is sprayed and cleaned again. The continuous operation of the device will repeat the alternating brushing of clean water and cleaning agent on the aluminum casting plate, thereby improving the cleaning effect of the aluminum casting plate.

[0031] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cleaning device for a large aluminum casting surface before coating, comprising a main body module (100) and a staggered cleaning module (200), characterized in that: The main body module (100) comprises a bottom plate (110), a mounting frame (120) and a support platform (130) being fixedly connected to the top of the bottom plate (110), and a clamping assembly (140) being arranged inside the mounting frame (120); The staggered cleaning module (200) comprises an exchange liquid supply component (210) connected to the top of the support platform (130); a spray component (230) is arranged between the two sides of the inner wall of the mounting frame (120); the spray component (230) is connected to the exchange liquid supply component (210); a connection component (220) is arranged on one side of the mounting frame (120); the connection component (220) is connected to the exchange liquid supply component (210) and the top of the bottom plate (110); a rolling component (240) is arranged between the two sides of the inner wall of the mounting frame (120); a plurality of cleaning brushes (250) are connected to the rolling component (240); the clamping component (140) is located inside the rolling component (240); the spray component (230) is located above the rolling component (240); and the connection component (220) is connected to the rolling component (240).

2. A large aluminum casting surface cleaning device before coating according to claim 1, characterized in that: The exchange liquid supply assembly (210) comprises a cleaning agent barrel (211) and a clean water barrel (216) fixedly connected to the top of the support platform (130); the outer surfaces of the cleaning agent barrel (211) and the clean water barrel (216) are both connected to a connecting pipe (212); the outer surfaces of the two connecting pipes (212) are both provided with a water inlet check valve (213); the interiors of the cleaning agent barrel (211) and the clean water barrel (216) are both movably connected to a piston plate (214); the tops of the two piston plates (214) are both fixedly connected to a special-shaped connecting rod (215); the two special-shaped connecting rods (215) extend to the outside of the cleaning agent barrel (211) and the clean water barrel (216), respectively.

3. A large aluminum casting surface cleaning device before coating according to claim 2, characterized in that: The spray assembly (230) comprises a second U-shaped tube (232), a first U-shaped tube (231) and a third U-shaped tube (234) fixedly connected between two sides of the inner wall of the mounting frame (120); the second U-shaped tube (232) is located above the first U-shaped tube (231); the outer surfaces of the second U-shaped tube (232) and the first U-shaped tube (231) are both fixedly connected with a plurality of first spray heads (233); the third U-shaped tube (234) is located outside the first U-shaped tube (231); the outer surface of the third U-shaped tube (234) is fixedly connected with a plurality of second spray heads (235).

4. A large aluminum casting surface cleaning device before coating according to claim 3, characterized in that: The spray assembly (230) further comprises a connecting pipe (236) fixedly connected between the outer surfaces of the first U-shaped pipe (231) and the third U-shaped pipe (234); a first connecting pipe (237) is fixedly connected between the outer surface of the connecting pipe (236) and the clean water bucket (216); a second connecting pipe (238) is fixedly connected between the cleaning agent bucket (211) and the second U-shaped pipe (232); and a water outlet one-way valve (239) is provided at a position close to one end of the outer surface of the second connecting pipe (238) and the first connecting pipe (237).

5. A large aluminum casting surface cleaning device before coating according to claim 4, characterized in that: The connection assembly (220) comprises a mounting seat (221) fixedly connected to the top of the bottom plate (110), the mounting seat (221) being movably connected to a hollow arm (222) inside, one side of the mounting seat (221) being rotatably connected to two connection gears (223), the outer surfaces of the two connection gears (223) being meshed with each other, one of the connection gears (223) being fixedly connected to the hollow arm (222), the two special-shaped connection rods (215) being movably connected to the inside of the hollow arm (222), and the outer surface of another of the connection gears (223) being fixedly connected to a hollow bar (224).

6. A large aluminum casting surface cleaning device before coating according to claim 5, characterized in that: The connection assembly (220) further comprises a rotating shaft (225) fixedly connected to one side of the mounting frame (120); one end of the rotating shaft (225) is fixedly connected to a large gear (226); one side of the large gear (226) is fixedly connected to a connection shaft (228); an outer surface of the connection shaft (228) is movably connected to the inside of the hollow bar (224); a small gear (227) is connected to the rolling assembly (240); and the small gear (227) is meshed with the large gear (226).

7. A large aluminum casting surface cleaning device before coating according to claim 6, characterized in that: The plurality of first nozzles (233) are all arranged at an angle, the nozzles of the plurality of first nozzles (233) are all directed toward the clamping assembly (140), and the nozzles of the plurality of second nozzles (235) are all directed vertically downward.

8. A large aluminum casting surface cleaning device before coating according to claim 7, characterized in that: The rolling assembly (240) comprises four rolling rods (241) which are rotatably connected between two sides of the inner wall of the mounting frame (120); the outer surfaces of the four rolling rods (241) are fixedly connected to two sprocket wheels (242); a chain (243) is transmission-connected between the outer surfaces of every two sprocket wheels (242); and the plurality of cleaning brushes (250) are respectively fixedly connected between the outer surfaces of two of the chains (243).

9. A large aluminum casting surface cleaning device before coating according to claim 8, characterized in that: The rolling assembly (240) further comprises a first motor (244) fixedly connected to the other side of the mounting frame (120), wherein one end of each of the two rolling rods (241) is fixedly connected to a linkage gear (245), the two linkage gears (245) are meshed with each other, one side of one of the linkage gears (245) is fixedly connected to a pinion gear (227), and the output shaft of the first motor (244) is fixedly connected to the other end of one of the rolling rods (241).

10. A large aluminum casting surface cleaning device before coating according to claim 9, characterized in that: The clamping assembly (140) comprises a hollow block (141) fixedly connected to the bottom of the inner wall of the mounting frame (120); a bidirectional screw rod (143) is rotatably connected between the two sides of the inner wall of the hollow block (141); two displacement blocks (142) are movably connected inside the hollow block (141); the interiors of the two displacement blocks (142) are both threadedly connected to the outer surfaces of the bidirectional screw rod (143); the tops of the two displacement blocks (142) are both fixedly connected to a clamping plate (144); a second motor (145) is fixedly connected to one side of the hollow block (141); and the output shaft of the second motor (145) is fixedly connected to one end of the bidirectional screw rod (143).

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