Automobile end plate surface paint spraying process and device

Abstract

The invention discloses an automobile end plate surface paint spraying process and device, and belongs to the technical field of spraying. Comprising a cyclone water curtain paint spraying cabinet and a sewage treatment box, the sewage treatment box is used for treating sewage generated by the cyclone water curtain paint spraying cabinet, the cyclone water curtain paint spraying cabinet comprises a cyclone baffle set which is fixedly arranged, a scraper assembly is slidably arranged on the cyclone baffle set, the sewage treatment box comprises a filtering mechanism, and the filtering mechanism comprises a wastewater tank. A second narrow groove section is arranged in the wastewater tank, a filter screen is slidably arranged in the second narrow groove section, a first wide groove section and a third wide groove section are arranged in the wastewater tank and located in front of and behind the second narrow groove section respectively, and a floating baffle is slidably arranged in the third wide groove section. A multi-stage treatment mechanism is arranged in the sewage treatment tank and is used for deeply treating a paint-water mixture, and clear water of a treated product enters the circulation area and is recycled through a water pump.

Description

Technical Field

[0001] This invention relates to the field of spraying technology, and in particular to a process and apparatus for spraying paint on the surface of automotive end panels. Background Technology

[0002] As a crucial load-bearing and protective component of the vehicle body, the end panel of an automobile is constantly exposed to a complex external environment, making it susceptible to erosion from rainwater, mud, acids, alkalis, and minor scratches. The painting process creates a uniform and dense paint film on its surface, constructing a dual physical and chemical protective barrier. Before painting, the end panel surface must undergo rigorous pretreatment, including degreasing, rust removal, phosphating, or electrophoresis, to ensure the surface is free of impurities and oxide layers, thus improving the adhesion between the paint film and the substrate. Subsequently, depending on process requirements and environmental standards, water-based or oil-based paints are selected for application. This typically involves multiple layers of spraying and curing, including primer, intermediate coat, topcoat, and clear coat, to achieve the specified paint film thickness and gloss.

[0003] The painting of automotive end panels is mostly carried out in a cyclone water curtain cabinet. When the equipment is working, the exhaust gas containing paint mist and dust enters the cabinet and is guided by the cyclone device to form a high-speed vortex. This allows the pollutant particles to fully collide and come into contact with the water curtain and water mist inside the cabinet. The paint mist particles are enveloped by the water and settle, while the dust is condensed by the water mist and falls into the water tank. The purification effect is better than that of ordinary water curtain cabinets. The tail end of the cyclone water curtain cabinet is a wastewater treatment mechanism used to treat paint-containing wastewater. The filter screen in the wastewater treatment mechanism is usually fixed and needs to be replaced manually in time when a large amount of impurities accumulate. The service life of the filter screen is relatively short. Summary of the Invention

[0004] This invention provides a process and apparatus for painting automotive end panels, which can solve the problems in the prior art where the filter screen in the wastewater treatment mechanism is usually fixed, requiring manual replacement when a large amount of impurities accumulate, and the filter screen has a short service life.

[0005] A car end panel surface painting device includes a cyclone water curtain painting cabinet and a wastewater treatment tank. The wastewater treatment tank is used to treat the wastewater generated by the cyclone water curtain painting cabinet. The cyclone water curtain painting cabinet includes a fixedly installed cyclone baffle assembly, and a scraper assembly is slidably installed on the cyclone baffle assembly. The wastewater treatment tank includes a filtration mechanism, which includes a wastewater tank. The wastewater tank has a second narrow section, and a filter screen is slidably installed in the second narrow section. A first wide section and a third wide section are respectively located before and after the second narrow section in the wastewater tank. A floating baffle is slidably installed in the third wide section. A vertical rod and several first cylindrical rods are also slidably installed in the wastewater treatment tank. A locking block is fixed on the vertical rod. The filter screen includes a mesh body and a U-shaped slot fixedly connected to its top end.

[0006] Furthermore, the cyclone water curtain spray booth includes a cabinet body, a water curtain plate inside the cabinet body, a serrated bottom on the water curtain plate, a water tank at the bottom of the cabinet body, a water storage tank at the top of the water curtain plate, and a plurality of first spray heads at the front end of the water tank. The plurality of first spray heads are interconnected and connected to the water treated by the sewage treatment tank through a first connecting pipe on the side of the cabinet body. A water pump is installed on the sewage treatment tank and is connected to the first connecting pipe and the second connecting pipe. A fan is also fixedly installed on the top of the cabinet body and is connected to the air inlet through an air duct.

[0007] Furthermore, the cabinet is equipped with a cyclone baffle assembly, which is composed of multiple metal plates.

[0008] Furthermore, the cabinet has a first threaded rod and a first limiting rod located at the upper interior. The first threaded rod is rotatably engaged with the cabinet, and the first limiting rod is fixedly engaged with the cabinet. A movable part is threaded onto the first threaded rod, and the movable part is slidably engaged with the first limiting rod. A connecting rod is fixedly mounted on the movable part, and a scraper assembly is detachably connected to the connecting rod. The detachable connection method includes snap-fit ​​and thread. The shape of the scraper assembly is adapted to the shape of the cyclone baffle assembly.

[0009] Furthermore, the end of the first threaded rod is coaxially and fixedly connected to a first pulley, and a fan blade is rotatably provided on the cabinet at the air inlet. One end of the fan blade is coaxially and fixedly provided with a second pulley, and a first synchronous belt is connected between the first pulley and the second pulley.

[0010] Furthermore, the second narrow groove section is composed of two L-shaped panels, and a filter screen is provided inside the second narrow groove section. The width of the second narrow groove section is smaller than that of the first wide groove section, and the filter screen is slidably disposed inside the second narrow groove section.

[0011] Furthermore, the filter screen includes a screen body, a mounting crossbar is fixedly provided at the top of the screen body, a U-shaped slot is fixedly provided on the mounting crossbar, sliders are fixedly provided at both ends of the mounting crossbar, a stop block is fixedly provided above the slider, and a circular sliding hole is provided on the stop block.

[0012] Furthermore, the second narrow groove section is provided with a first sliding groove, the slider on the filter screen slides in cooperation with the first sliding groove, the cabinet is provided with a second sliding groove, a moving block is slidably provided on the second sliding groove, a spring is connected between the second sliding groove and the moving block, a first bracket is fixedly provided on one end of the moving block, a vertical rod is fixedly provided on the first bracket, a second bracket is fixedly provided on the other end of the moving block, a locking block is fixedly provided on the second bracket, and an L-shaped rod is also slidably provided up and down on the cabinet, and two first cylindrical rods are fixedly provided on the L-shaped rod.

[0013] Furthermore, a first telescopic cylinder is fixedly installed on the outside of the wastewater tank, and its output end is fixedly connected to the first lifting plate. A third sliding groove is also provided on the side of the wastewater tank, and a limiting plate is slidably provided on the third sliding groove. The height of the limiting plate is higher than the height of the first lifting plate.

[0014] Furthermore, the height of the limiting plate is higher than the height of the first lifting plate.

[0015] Beneficial effects

[0016] 1. This invention enables real-time cleaning of the cyclone baffle assembly by providing a scraper assembly. The scraper assembly can move back and forth along the cyclone baffle assembly to achieve continuous cleaning of the cyclone baffle assembly, avoid the accumulation of paint mist particles on it, extend the cleaning cycle, reduce the cleaning difficulty, and the scraper assembly is driven by wind power, effectively utilizing the circulating energy in the device and saving resources.

[0017] 2. This invention also includes a wastewater treatment tank, which is equipped with a multi-stage treatment mechanism for deep treatment of the paint-water mixture. The treated water enters the circulation zone and is recycled by a water pump. The wastewater treatment tank includes a filtration mechanism, which includes a filter screen. The filter screen is used to filter large particles of paint residue or flocculents in the wastewater. When the impurities in the filter screen accumulate to a certain amount, it needs to be replaced to ensure continuous water treatment. Filter screen replacement is usually done manually, and the replacement process requires machine shutdown, which affects production efficiency. Therefore, this embodiment proposes a filtration mechanism including an automatically replaceable filter screen to extend the manual operation cycle and eliminate the need for machine shutdown for replacement, thus ensuring production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure I ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure II ; Figure 3 This is a front view of the internal scraper assembly of the present invention; Figure 4 This is a cross-sectional view of the overall structure of the present invention; Figure 5 This is a schematic diagram of the overall structure of the present invention. Figure III ; Figure 6 This is a schematic diagram of the overall structure of the present invention. Figure IV ; Figure 7 This is an enlarged schematic diagram of part A of the present invention; Figure 8 This is an enlarged schematic diagram of part B of the present invention; Figure 9 This is a schematic diagram of the filter structure of the present invention; Figure 10 This is a front view of the wastewater treatment tank of the present invention; Figure 11 This is a top view of the second narrow groove section of the present invention.

[0019] Explanation of reference numerals in the attached figures: 100. Water curtain spray booth; 200. Wastewater treatment tank; 101. Cabinet body; 102. Fan; 103. Air inlet; 104. Water curtain panel; 105. First spray head; 106. Serrated edge; 107. Second connecting pipe; 108. First connecting pipe; 109. Cyclone baffle assembly; 110. Scraper assembly; 111. Connecting rod; 112. First threaded rod; 113. Moving part; 114. First pulley; 115. First synchronous belt; 116. Second pulley; 117. Air duct; 118. Water pump; 201. Wastewater tank; 202. Filter screen; 203. Second narrow trough section; 204. 205. Second slide groove; 206. Moving block; 207. Second bracket; 208. First bracket; 209. Vertical rod; 210. Mounting horizontal plate; 211. Second cylindrical rod; 212. Floating baffle; 213. First telescopic cylinder; 214. First lifting plate; 215. Third slide groove; 216. Limiting plate; 217. L-shaped rod; 218. First cylindrical rod; 219. Locking block; 220. Spring; 20201. Net body; 20202. Mounting horizontal bar; 20203. Stop block; 20204. U-shaped groove; 20205. Circular sliding hole; 20206. Slider. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 As shown in the figure, an embodiment of the present invention provides a car end panel surface painting device, including a cyclone water curtain painting booth 100 and a wastewater treatment tank 200, as follows: Figure 2As shown, the cyclone water curtain spray booth 100 includes a cabinet body 101, a water curtain plate 104 inside the cabinet body 101, serrations 106 at the bottom of the water curtain plate 104, a water tank at the bottom of the cabinet body 101, and a water storage tank at the top of the water curtain plate 104. Circulating water is continuously injected into the water storage tank, and the water flows out along the top of the water storage tank, along the water curtain plate 104, and into the water tank at the bottom of the cabinet body 101. The water storage tank is connected to the treated water of the sewage treatment tank 200 through a second connecting pipe 107, achieving continuous water supply to the water storage tank. Several first spray heads 105 are also provided at the front end of the water tank. Several first spray heads 105 are interconnected and connected to the treated water in the sewage treatment tank 200 via a first connecting pipe 108 on the side of the cabinet 101, achieving water circulation. A water pump 118 is installed on the sewage treatment tank 200, connected to the first connecting pipe 108 and the second connecting pipe 107, to extract the treated water and achieve water reuse. A fan 102 is also fixedly installed on the top of the cabinet 101, connected to the air inlet 103 via an air duct 117, and the fan 102 adsorbs exhaust gases, such as... Figure 3 As shown, the cabinet 101 is equipped with a cyclone baffle assembly 109, which is composed of multiple metal plates to achieve efficient capture of paint mist. After the exhaust gas containing paint mist enters the equipment, the flow direction is changed by the guiding effect of the cyclone baffle assembly 109, forming a high-speed rotating cyclone flow field. Under the action of centrifugal force, the paint mist particles are thrown towards the cavity wall and come into full contact with the water curtain, achieving gas-solid separation.

[0022] In actual use, under the action of the fan 102, the water flow will continuously tumble between the cyclone baffle assembly 109. The paint mist particles in the water flow will be adsorbed on the cyclone baffle assembly 109 and need to be cleaned regularly. However, since the cyclone baffle assembly 109 is usually fixedly installed inside the equipment, it requires professional personnel to clean it, and the cleaning process is relatively troublesome. Therefore, this invention proposes a tube plate assembly for cleaning the cyclone baffle assembly 109. The scraper assembly 110 can move back and forth along the cyclone baffle assembly 109 to achieve continuous cleaning of the cyclone baffle assembly 109, avoid the accumulation of paint mist particles on it, extend the cleaning cycle, and reduce the cleaning difficulty.

[0023] like Figure 3 and Figure 4As shown, the shape of the scraper assembly 110 is adapted to the shape of the cyclone baffle assembly 109. A first threaded rod 112 and a first limiting rod are located on the upper part of the cabinet 101. The first threaded rod 112 is rotatably engaged with the cabinet 101, and the first limiting rod is fixedly engaged with the cabinet 101. A movable part 113 is threaded onto the first threaded rod 112, and the movable part 113 is slidably engaged with the first limiting rod. A connecting rod 111 is fixedly mounted on the movable part 113, and the connecting rod 111 is detachably connected to the scraper assembly 110. The detachable connection methods include snap-fit ​​and threaded connection. The first threaded rod 112 can be driven by wind or water (rotation is achieved using circulating water within the device). In this embodiment, wind drive is preferred. Specifically, the end of the first threaded rod 112 is coaxially and fixedly connected to a first pulley 114. A fan is rotatably mounted on the cabinet 101 at the air inlet 103. The fan blade is coaxially mounted with a second pulley 116 at one end. A first synchronous belt 115 connects the first pulley 114 and the second pulley 116. When in use, the air inlet 103 of the fan 102 generates wind power, which drives the fan blade to rotate, thereby rotating the second pulley 116. The second pulley 116 rotates the first pulley 114 through the first synchronous belt 115, which in turn drives the rotation of the first threaded rod 112. The first threaded rod 112 is a reciprocating screw. The rotation of the first threaded rod 112 causes the scraper assembly 110 to move laterally along the cyclone baffle group 109, thereby reciprocatingly scraping away paint mist particles on the cyclone baffle group 109 and preventing the continuous accumulation of paint mist particles on the cyclone baffle group 109. Furthermore, the present invention utilizes the continuous negative pressure generated by the fan 102 to achieve the continuous rotation of the first threaded rod 112, thereby enabling the scraper assembly 110 to reciprocate and scrape away the paint mist particles.

[0024] In this embodiment, the scraper assembly 110 is made of lightweight, high-strength materials such as carbon fiber to reduce inertial resistance; the reciprocating screw adopts a ball bearing type to reduce mechanical friction and improve driving efficiency; the scraper assembly 110 has a 1:1 shape that fits the curved or zigzag shape of the cyclone baffle assembly 109 to ensure that each scraper segment can closely fit the contact surface; the scraper assembly 110 adopts a wedge-shaped streamlined cross section, and an elastic rubber strip is added to the scraping lip to compensate for installation errors and wear, thereby improving the scraping effect.

[0025] During operation, the built-in high-pressure centrifugal fan 102 starts, creating a negative pressure field within the cabinet 101. Paint mist-laden exhaust gases generated during painting are rapidly drawn into the cavity. Once inside, the exhaust gases flow through the cyclone baffle assembly 109. The baffle's arc-shaped structure forces the airflow to change its trajectory, creating a high-speed rotating cyclone flow field. At this point, paint mist particles are thrown towards the equipment cavity wall under centrifugal force, with larger particles directly impacting the cavity wall for initial separation. The circulating water in the wastewater pool at the bottom of the equipment is transported to the water storage tank and the first spray head 105 at the top of the cavity, forming a uniform water curtain that covers the entire cyclone flow field area. Paint mist particles thrown towards the cavity wall by centrifugal force directly contact the water curtain. Tiny paint mist particles that are not initially separated collide and merge with the water mist during the cyclone's rotation, becoming enveloped by water droplets to form a "paint-water mixture." Simultaneously, the turbulence effect of the cyclone prolongs the contact time between the exhaust gas and the water curtain, improving capture efficiency. Some paint mist that is not captured by the water curtain adheres to the surface of the cyclone baffle assembly 109, which can be cleaned later by the scraper assembly 110. The "paint-water mixture" that has captured the paint mist flows back along the cavity wall to the wastewater treatment tank 200 at the end of the device, entering the water circulation treatment stage. The wastewater treatment tank 200 is equipped with a multi-stage treatment mechanism for deep treatment of the paint-water mixture. The clean water from the treated product enters the circulation zone and is recycled by the water pump 118. The wastewater treatment tank 200 includes a filtration mechanism, which includes a filter screen 202. The filter screen 202 is used to filter large particles of paint residue or flocculents in the wastewater. When the impurities in the filter screen 202 accumulate to a certain amount, it needs to be replaced to ensure continuous water treatment. The replacement of the filter screen 202 is usually done manually, and the replacement process requires machine shutdown, which affects production efficiency. Therefore, this embodiment proposes a filtration mechanism, including an automatically replaceable filter screen 202, to extend the manual operation cycle and eliminate the need for machine shutdown for replacement, thus ensuring production efficiency.

[0026] Specifically, such as Figure 5 and 6 As shown, the filtration mechanism is installed inside the wastewater treatment tank 200 and is used to filter large particles, such as... Figure 11 As shown, the wastewater treatment tank 200 includes a wastewater tank 201, which has a first wide section, a second narrow section 203, and a third wide section, as shown. Figure 11As shown, the second narrow channel section 203 consists of two L-shaped baffles. Water flows out along the middle area of ​​the two L-shaped baffles. A filter screen 202 is installed inside the second narrow channel section 203 to filter large particulate impurities in the wastewater. The wastewater flows into the second narrow channel section 203 after passing through the first wide channel section, is filtered by the filter screen 202, and finally enters the third wide channel section. The width of the second narrow channel section 203 is smaller than that of the first wide channel section, so the water flow velocity in the second narrow channel section 203 is higher. The filter screen 202 is slidably installed in the second narrow channel section 203, and floating baffles 212 that can move up and down are also provided at both ends of the second narrow channel section 203 to block the filter screen 202. To prevent it from moving under the action of water flow, when there are few impurities in the filter screen 202, the filtered water can flow quickly through the filter screen 202, and the liquid level in the third wide section is kept at a normal height. When impurities gradually accumulate in the filter screen 202, some of the mesh holes in the filter screen 202 will be blocked, the water flow rate into the third wide section will decrease, the liquid level in the third wide section will drop, and the floating baffle 212 will drop with the liquid level. When the liquid level drops to the warning height, the floating baffle 212 drops below the filter screen 202. The filter screen 202 will move backward to the first lifting plate 214 after losing the obstruction of the floating baffle 212. The first lifting plate 214 lifts the filter screen 202 upward.

[0027] If the filter screen 202 is lifted directly upwards during use and then replaced with a new filter screen 202, a section of water flow will not be filtered, affecting the filtration efficiency. Therefore, this invention places a new filter screen 202 in front of the filter screen 202 during the movement of the filter screen 202 to be replaced, ensuring that the wastewater is always in a filtered state.

[0028] Specifically, such as Figure 9 As shown, the filter screen 202 includes a screen body 20201. A mounting crossbar 20202 is fixedly provided at the top of the screen body 20201. A U-shaped slot 20204 is fixedly provided on the mounting crossbar 20202. Slider blocks 20206 are fixedly provided at both ends of the mounting crossbar 20202. A stop block 20203 is fixedly provided above the slider 20206. A circular sliding hole 20205 is provided on the stop block 20203.

[0029] like Figure 7 and Figure 8As shown, the second narrow groove section 203 is provided with a first sliding groove 204, and the slider 20206 on the filter screen 202 slides in cooperation with the first sliding groove 204. The cabinet 101 is provided with a second sliding groove 205, and a moving block 206 is slidably provided on the second sliding groove 205. A spring 220 connects the second sliding groove 205 and the moving block 206. A first bracket 208 is fixedly provided on one end of the moving block 206, and a vertical rod 209 is fixedly provided on the first bracket 208. A second bracket 207 is fixedly provided on the other end of the moving block 206. A locking block 219 is provided. When in use, the replacement filter 202 is placed on the locking block 219. Specifically, the filter 202 is locked onto the locking block 219 through the U-shaped slot 20204 on it to realize the installation of the replacement filter 202. An L-shaped rod 217 is also provided on the cabinet 101, which slides up and down. Two first cylindrical rods 218 are fixed on the L-shaped rod 217. After the replacement filter 202 is fixed on the locking block 219, the L-shaped rod 217 is moved down to insert the two first cylindrical rods 218 into the circular sliding hole 20205 of the replacement filter 202.

[0030] like Figure 10 As shown, during use, when the filter 202 in the second narrow groove section 203 begins to move, the filter 202 will gradually contact the vertical rod 209 behind it, and drive the vertical rod 209 to move backward synchronously. During the backward movement of the vertical rod 209, the locking block 219 moves backward synchronously, and the locking block 219 separates from the U-shaped slot 20204 on the replacement filter 202. The replacement filter 202 will then descend along the first cylindrical rod 218 to the front of the second narrow groove section 203, as shown. Figure 7The first lifting plate 214 shown is raised and lowered by a first telescopic cylinder 213. The first telescopic cylinder 213 is fixedly installed on the outside of the wastewater tank 201, and its output end is fixedly connected to the first lifting plate 214. A third sliding groove 215 is also provided on the side of the wastewater tank 201. A limiting plate 216 is slidably provided on the third sliding groove 215. The height of the limiting plate 216 is higher than the height of the first lifting plate 214. Several second cylindrical rods 211 are fixedly provided on both sides of the second narrow groove section 203 inside the wastewater tank 201. The top of the second cylindrical rods 211 on both sides is fixedly provided with the same mounting horizontal plate 210. A floating baffle 212 is sleeved on the second cylindrical rods 211 on both sides. The mating hole on the floating baffle 212 is larger than the second... The diameter of the cylindrical rod 211 is designed to prevent clogging. During use, the floating baffle 212 descends with the water level. The filter screen 202 in the second narrow channel section 203, no longer blocked by the floating baffle 212, begins to move backward to the first lifting plate 214. At this time, the first lifting plate 214 is located below the stop block 20203 of the filter screen 202, and the limiting plate 216 is located above the stop block 20203. It has a cylindrical protrusion that cooperates with the circular sliding hole 20205 on the stop block 20203. The first lifting plate 214 can lift the filter screen 202 upward by moving upward. At this time, the filter screen 202 can be replaced to achieve the filtration function, which doubles the manual replacement time of the filter screen 202 and extends the replacement cycle of the filter screen 202.

[0031] During use, when the paint being processed contains mostly oily impurities, the content of impurities such as mixed oily resins may be high, which may cause the filter screen 202 to become immobile. Therefore, this embodiment also proposes a method for moving the filter screen 202 to ensure its movement. A second telescopic cylinder is fixedly installed behind the second narrow groove section 203. A first magnet is fixedly installed at the output end of the second telescopic cylinder, and a second magnet is installed at the rear end of the filter screen 202. The first magnet and the second magnet attract each other. When the filter screen 202 becomes immobile, the second telescopic cylinder extends, causing the first magnet and the second magnet to attract each other, thereby moving the filter screen 202.

[0032] A painting process for automotive end panel surfaces includes the following steps: S1: First, place the car end plate in the painting area. After the high-pressure centrifugal fan 102 is started, a negative pressure field is formed in the cabinet 101. The paint mist exhaust gas generated by the painting is quickly sucked into the cavity. After the exhaust gas enters, it will flow through the cyclone baffle group 109. The arc structure of the baffle forces the airflow to change its trajectory and forms a high-speed rotating cyclone flow field. The paint mist particles are thrown towards the equipment cavity wall under the action of centrifugal force. Large paint mist particles directly hit the cavity wall and are initially separated. S2: The "paint-water mixture" that has captured the paint mist will flow back along the cavity wall to the wastewater treatment tank 200 at the end of the device and enter the water circulation treatment stage. The wastewater treatment tank 200 is equipped with a multi-stage treatment mechanism for deep treatment of the paint-water mixture. The clean water of the treated product enters the circulation zone and is recycled by the water pump 118. The wastewater treatment tank 200 includes a filtration mechanism, which includes a filter screen 202. The filter screen 202 is used to filter large particles of paint residue or flocculents in the wastewater. When the impurities in the filter screen 202 accumulate to a certain amount, it needs to be replaced to ensure the continuous water treatment. The replacement of the filter screen 202 is usually done manually, and the replacement process requires machine shutdown, which affects production efficiency. Therefore, this embodiment proposes a filtration mechanism, including an automatically replaceable filter screen 202, to extend the manual operation cycle and replace it without stopping the machine, thus ensuring production efficiency.

[0033] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A device for painting the surface of an automotive end panel, characterized in that, It includes a cyclone water curtain spray booth (100) and a sewage treatment tank (200). The sewage treatment tank (200) is used to treat the sewage generated by the cyclone water curtain spray booth (100). The cyclone water curtain spray booth (100) includes a fixedly installed cyclone baffle assembly (109) and a scraper assembly (110) slidably installed on the cyclone baffle assembly (109). The wastewater treatment tank (200) includes a filtration mechanism, which includes a wastewater tank (201). The wastewater tank (201) has a second narrow section (203) inside, and a filter screen (202) is slidably installed inside the second narrow section (203). The wastewater tank (201) has a first wide section and a third wide section respectively located before and after the second narrow section (203). A floating baffle (212) is slidably installed inside the third wide section. The wastewater treatment tank (200) also has a vertical rod (209) slidably installed inside, and several first cylindrical rods (218) slidably installed inside. A locking block (219) is fixedly installed on the vertical rod (209). The filter (202) includes a mesh body (20201) and a U-shaped slot (20204) fixedly connected to its top end.

2. The automotive end panel surface painting device as described in claim 1, characterized in that, The cyclone water curtain spray booth (100) includes a cabinet (101), a water curtain plate (104) is provided inside the cabinet (101), the bottom of the water curtain plate (104) is provided with serrations (106), the bottom of the cabinet (101) is provided with a water tank, the top of the water curtain plate (104) is provided with a water storage tank, the front end of the water tank is also provided with a number of first spray heads (105), the number of first spray heads (105) are interconnected with each other, and are connected to the water treated by the sewage treatment tank (200) through the first connecting pipe (108) on the side of the cabinet (101). A water pump (118) is installed on the sewage treatment tank (200), the water pump (118) is connected to the first connecting pipe (108) and the second connecting pipe (107), and a fan (102) is fixedly provided on the top of the cabinet (101), the fan (102) is connected to the air inlet (103) through the air duct (117).

3. The automotive end panel surface painting device as described in claim 2, characterized in that, The cabinet (101) is equipped with a cyclone baffle assembly (109), which is composed of multiple metal plates.

4. The automotive end panel surface painting device as described in claim 1, characterized in that, The cabinet (101) has a first threaded rod (112) and a first limiting rod located on its upper interior. The first threaded rod (112) is rotatably engaged with the cabinet (101), and the first limiting rod is fixedly engaged with the cabinet (101). A movable part (113) is threadedly engaged on the first threaded rod (112), and the movable part (113) is slidably engaged with the first limiting rod. A connecting rod (111) is fixedly provided on the movable part (113), and a scraper assembly (110) is detachably connected to the connecting rod (111). The detachable connection methods include snap-fit ​​and thread. The scraper assembly (110) is shaped to match the cyclone baffle assembly (109).

5. The automotive end panel surface painting device as described in claim 4, characterized in that, The first threaded rod (112) is coaxially connected to the end of a first pulley (114), and a fan blade is rotatably provided on the cabinet (101) at the air inlet (103). One end of the fan blade is coaxially connected to a second pulley (116), and a first synchronous belt (115) is connected between the first pulley (114) and the second pulley (116).

6. The automotive end panel surface painting device as described in claim 1, characterized in that, The second narrow groove section (203) is composed of two L-shaped panels. A filter screen (202) is provided inside the second narrow groove section (203). The width of the second narrow groove section (203) is smaller than that of the first wide groove section. The filter screen (202) is slidably disposed inside the second narrow groove section (203).

7. The automotive end panel surface painting device as described in claim 6, characterized in that, The filter screen (202) includes a screen body (20201), a mounting crossbar (20202) is fixedly provided at the top of the screen body (20201), a U-shaped slot (20204) is fixedly provided on the mounting crossbar (20202), sliders (20206) are fixedly provided at both ends of the mounting crossbar (20202), a stop block (20203) is fixedly provided above the slider (20206), and a circular sliding hole (20205) is provided on the stop block (20203).

8. The automotive end panel surface painting device as described in claim 7, characterized in that, The second narrow groove section (203) is provided with a first sliding groove (204), and the slider (20206) on the filter screen (202) slides in cooperation with the first sliding groove (204). The cabinet (101) is provided with a second sliding groove (205), and a moving block (206) is slidably provided on the second sliding groove (205). A spring (220) is connected between the second sliding groove (205) and the moving block (206). A first bracket (208) is fixedly provided on one end of the moving block (206), and a vertical rod (209) is fixedly provided on the first bracket (208). A second bracket (207) is fixedly provided on the other end of the moving block (206), and a locking block (219) is fixedly provided on the second bracket (207). An L-shaped rod (217) is also slidably provided up and down on the cabinet (101), and two first cylindrical rods (218) are fixedly provided on the L-shaped rod (217).

9. The automotive end panel surface painting device as described in claim 1, characterized in that, The wastewater tank (201) is fixedly installed with a first telescopic cylinder (213) on the outside, and its output end is fixedly connected to the first lifting plate (214). The wastewater tank (201) is also provided with a third sliding groove (215) on the side. A limiting plate (216) is slidably provided on the third sliding groove (215), and the height of the limiting plate (216) is higher than the height of the first lifting plate (214).

10. The automotive end panel surface painting device as described in claim 9, characterized in that, The height of the limiting plate (216) is higher than the height of the first lifting plate (214).

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