An exhaust gas treatment device for metal surface treatment

Abstract

The application provides a waste gas treatment equipment for metal surface treatment, and belongs to the technical field of waste gas treatment.The waste gas metal particle filtering box is provided with a through installation slot and a matching slot penetrating through the outer wall of one side of the waste gas metal particle filtering box, the through installation slot is located at one side of the matching slot, an installation hole is formed in the outer wall of one side of the waste gas metal particle filtering box and close to the outer circumferential position of the through installation slot, and the waste gas metal particle filtering box is provided with a filtering assembly; the multiple filtering assemblies in the waste gas metal particle filtering box are inserted and matched, a sheet-shaped filtering structure with the metal particle powder filtering capacity of waste gas is formed, the multiple filtering assemblies each have an independent blockage cleaning capacity, and the space between the cylinder, the metal filtering net and the circular table is blocked on one side by the opposite movement of the two circular arc plates.

Description

Technical Field

[0001] This invention belongs to the field of waste gas treatment technology, and specifically relates to a waste gas treatment device for metal surface treatment. Background Technology

[0002] Metal surface treatment refers to the process of forming a surface layer on the metal substrate with different mechanical, physical and chemical properties from the substrate to improve its corrosion resistance, wear resistance, decoration or other special functions. The exhaust gas generated during the metal surface treatment process usually contains metal particles and powders. These particles mainly come from processes such as electroplating, spraying, grinding, polishing, pickling, etc., and are released into the air during the processing due to mechanical action or high temperature reaction.

[0003] Existing treatment methods mostly involve directly passing the gas generated from metal surface treatment into a filtration device. The metal particles and powder in the gas are filtered through the filter screen in the filtration device, and then the filtered gas is discharged. However, after a period of use, the filter screen in the filtration device is easily clogged by impurities, making it difficult for the gas to pass through the filter screen quickly. The filter screen is also troublesome to clean, thus affecting the treatment effect of harmful gases.

[0004] Therefore, a waste gas treatment device for metal surface treatment is proposed. Summary of the Invention

[0005] The present invention provides a waste gas treatment device for metal surface treatment, the purpose of which is to solve the problems mentioned above.

[0006] This invention provides a waste gas treatment device for metal surface treatment, including a waste gas metal particle filter box. The top of the waste gas metal particle filter box is provided with a box cover, and an air inlet is provided on the outer wall of one side of the waste gas metal particle filter box near the bottom position. An air outlet is provided on the outer wall of one side of the waste gas metal particle filter box near the top position. A through mounting groove and a mating groove are formed on the outer wall of the waste gas metal particle filter box adjacent to the air inlet. The through mounting groove is located on one side of the mating groove. An installation hole is formed on the outer wall of one side of the waste gas metal particle filter box near the outer periphery of the through mounting groove. A filter assembly is provided on the waste gas metal particle filter box. The filter assembly includes a cylinder extending through a through mounting groove. A guide groove is provided on one side of the cylinder, and an upper movable cavity and a lower movable cavity are provided inside the cylinder. The upper movable cavity is located above the lower movable cavity. Two arc plates are symmetrically arranged on one side of the cylinder, and two guide strips are symmetrically arranged on the outer walls of the two arc plates. A gear tooth groove is provided on the outer circumference of the arc plates near the guide strips. A frustum is provided on the side of the two arc plates away from the cylinder. A lower movable cavity is provided on one side of the frustum near the horizontal side of the lower movable cavity. A guide groove is provided on one side of the frustum that slides with the guide strips. A metal filter screen is fixedly connected to the center of one side of the cylinder near the position between the upper movable cavity and the lower movable cavity. The other side wall of the metal filter screen is fixedly connected to the frustum.

[0007] Furthermore, a support frame is provided on one outer wall of the exhaust gas metal particle filter box, near the bottom of the through-mounting groove. An electric push rod is provided on the outer wall of the support frame away from the exhaust gas metal particle filter box. A sealing baffle is fixedly connected to the electric push rod through its output end. The sealing baffle and the lower movable cavity are dynamically sealed together.

[0008] Furthermore, a limiting disc is provided on the other side of the cylinder. Several docking holes are equally spaced in the circumferential direction on one side of the outer wall of the limiting disc near the outer periphery of the cylinder. Cylinder 1 and Cylinder 2 are provided on the outer wall of the limiting disc away from the cylinder. Cylinder 1 is located above Cylinder 2, and Cylinder 1 is fixedly connected to an anti-deformation pusher through its output end. Cylinder 2 is fixedly connected to a pusher through its output end. A cavity is provided on the top of the pusher. Two springs are symmetrically arranged at the bottom of the cavity. A pusher plate is provided at one end of each spring.

[0009] Furthermore, two docking blocks are mirror-image arranged on the outer circumference of the cylinder and the frustum. One of the docking blocks has a docking rib on the outer wall away from the cylinder and the frustum, and the other docking block has a docking groove on the outer wall away from the cylinder and the frustum. A groove is formed on the outer wall of the docking block facing the cylinder and the frustum. A motor bracket is provided on the inner side wall of the groove. A three-phase motor is provided on one side of the outer wall of the motor bracket. A gear is fixedly connected to the three-phase motor through one output end of the motor, and the gear meshes with the gear tooth groove.

[0010] Furthermore, a horizontal plate is provided on one side of the outer wall of the exhaust gas metal particle filter box, near the top of the through-mounting groove. An electric push rod is provided on the top of the horizontal plate. A scraper plate is fixedly connected to the output end of the electric push rod on one side. The scraper plate and the side wall facing the truncated cone are on the same vertical plane. A waste collection hood is provided on one side of the outer wall of the exhaust gas metal particle filter box, near the bottom of the through-mounting groove.

[0011] Furthermore, the mating ribs and mating grooves on the mating block are matched and fit with the mating grooves, and the mating ribs and mating grooves are inserted and fitted together. An arc groove is provided on one side of the outer wall of the mating block to dynamically seal with the arc plate. By adopting the above technical solution, after the mating block is inserted into the mating groove, the mating groove can be sealed, ensuring the airtightness of the exhaust gas metal particle filter box and preventing exhaust gas from leaking out of the interior of the exhaust gas metal particle filter box. The design of the arc groove ensures the smooth circumferential movement of the arc plate while ensuring the sealing of the screw joint. The insertion and matching between the mating ribs and the mating grooves can realize the combination of adjacent filter components, thereby forming a sheet-like filter structure with sealing performance inside the exhaust gas metal particle filter box, and thus filtering the metal particle powder in the exhaust gas.

[0012] Furthermore, the disc and the exhaust metal particle filter box are fixedly connected, the anti-deformation pusher and the upper movable cavity are dynamically sealed together, the pusher and the pusher plate are dynamically sealed together with the lower movable cavity after being combined, and the pusher plate abuts against the bottom of the metal filter screen under the pushing force of the spring. By adopting the above technical solution, the fixed connection between the limiting disc and the exhaust gas metal particle filter box allows the filter assembly to be stably installed on the exhaust gas metal particle filter box. The dynamic sealing cooperation ensures the sealing of the upper and lower movable chambers after the anti-deformation pusher, pusher platform and pusher plate are combined, preventing gas and metal particle powder leakage. The abutting pusher plate can scrape away the metal particle powder that has accumulated at the bottom of the metal filter screen to prevent the metal filter screen from clogging and ensure the exhaust gas treatment efficiency.

[0013] Furthermore, the lower movable cavity one and the lower movable cavity two have the same cross-sectional area and shape, and the lower movable cavity one and the lower movable cavity two are on the same horizontal plane and overlap each other; By adopting the above technical solution, using the lower movable chamber one and lower movable chamber two with the same structure and the same horizontal position, the metal particles and powder can be squeezed between them with the cooperation of the pusher platform, pusher plate and sealing baffle respectively. This not only facilitates the discharge of waste gas, but also compresses the volume of metal particles and powder, making it easier for the compressed metal particles and powder to be discharged from the waste gas metal particle filter box. By cleaning the metal particles and powder in the filter components one by one, the metal particles and powder can be cleaned without stopping the waste gas filtration process, improving the waste gas treatment efficiency and realizing automatic cleaning of metal particles and powder.

[0014] The beneficial effects of this invention are as follows: 1. This invention utilizes multiple interlocking filter components in an exhaust gas metal particle filter box to create a sheet-like filter structure capable of filtering metal particles and powder from exhaust gas. Each filter component possesses independent clogging and cleaning capabilities. By utilizing two opposing arc plates, the space between the cylinder, metal filter screen, and truncated cone is sealed on one side, preventing exhaust gas from flowing in while simultaneously scraping and compressing the accumulated metal particles and powder below the metal filter screen. This compresses the volume of the metal particles and powder while simultaneously discharging the exhaust gas, preventing pollution caused by the exhaust gas being discharged along with the metal particles and powder. By cleaning the metal particles and powder in each filter component individually, the cleaning of metal particles and powder can be performed without stopping the exhaust gas filtration process, improving exhaust gas treatment efficiency and achieving automatic cleaning of metal particles and powder.

[0015] 2. The present invention uses a scraper to scrape the metal particles and powder pushed out by the pusher table and pusher plate vertically downwards, ensuring that all the metal particles and powder fall and are collected inside the waste collection hood, thereby realizing the collection of metal particles and powder.

[0016] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention (from the left side). Figure 2 This is a schematic diagram of the structure of an embodiment of the present invention (view from the right side). Figure 3 This is a schematic diagram of the assembly of the exhaust gas metal particle filter box and filter components according to an embodiment of the present invention; Figure 4This is a schematic diagram of the waste gas metal particle filter box structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the filter component structure according to an embodiment of the present invention; Figure 6 This is an exploded view of the filter assembly according to an embodiment of the present invention; Figure 7 This is an embodiment of the present invention. Figure 6 Enlarged diagram of point A in the diagram; Figure 8 This is a three-dimensional cross-sectional schematic diagram of the filtering component according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the sealing baffle, anti-deformation pusher, and pusher structure of an embodiment of the present invention; Reference numerals: 1. Waste gas metal particle filter box; 11. Box cover; 12. Air inlet; 13. Air outlet; 14. Horizontal plate; 141. Electric push rod one; 142. Scraper plate; 15. Waste collection hood; 16. Through mounting groove; 17. Fitting groove; 18. Mounting hole; 2. Filter assembly; 21. Cylinder; 211. Guide circular groove one; 212. Upper movable cavity; 213. Lower movable cavity one; 22. Arc plate; 221. Guide circular bar; 222. Gear tooth groove; 23. Frustum; 231. Guide circular groove two ; 232. Lower movable cavity II; 24. Support frame; 241. Electric push rod II; 242. Sealing baffle; 25. Limiting disc; 251. Docking hole; 26. Cylinder I; 261. Anti-deformation pusher; 27. Cylinder II; 271. Pushing platform; 272. Cavity; 273. Spring; 274. Pushing plate; 28. Metal filter screen; 29. ​​Docking block; 291. Docking rib; 292. Docking groove; 293. Groove; 294. Motor bracket; 295. Three-phase motor; 296. Gear. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] Example 1 Reference Figure 1-6 and Figure 8-9This invention provides a waste gas treatment device for metal surface treatment, including a waste gas metal particle filter box 1. The top of the waste gas metal particle filter box 1 is provided with a box cover 11, and an air inlet 12 is provided on the outer wall of one side of the waste gas metal particle filter box 1 near the bottom position. An air outlet 13 is provided on the outer wall of one side of the waste gas metal particle filter box 1 near the top position. Both the air inlet 12 and the air outlet 13 are connected to the internal space of the waste gas metal particle filter box 1. A through mounting groove 16 and a mating groove 17 are provided on the outer wall of the waste gas metal particle filter box 1 adjacent to the air inlet 12. The through mounting groove 16 is located on one side of the mating groove 17 and the through mounting groove 16 and the mating groove 17 are connected. An installation hole 18 is provided on the outer wall of one side of the waste gas metal particle filter box 1 near the outer periphery of the through mounting groove 16. A filter assembly 2 is provided on the waste gas metal particle filter box 1. The filter assembly 2 includes a cylinder 21 and a frustum 23 extending through the through mounting groove 16. The cylinder 21 is located on the same horizontal axis as the frustum 23. A guide groove 211 is provided on one side of the cylinder 21, and an upper movable cavity 212 and a lower movable cavity 213 are provided inside the cylinder 21. The upper movable cavity 212 is located above the lower movable cavity 213. Two arc plates 22 are symmetrically arranged on one side of the cylinder 21. The arc plates 22 are quarter-circular ring structures. Two guide bars 221 are symmetrically arranged on the outer walls of the two arc plates 22. Gear teeth are provided on the outer circumference of the arc plates 22 near the guide bars 221. The groove 222 has a frustum 23 on one side of the two arc plates 22 away from the cylinder 21. A second lower movable cavity 232 is formed on one side of the frustum 23 near the horizontal side of the first lower movable cavity 213. The first lower movable cavity 213 and the second lower movable cavity 232 have the same cross-sectional area and shape, and are on the same horizontal plane and overlap. Using the identical structure and the same horizontal position of the second lower movable cavity 213 and the second lower movable cavity 232, with the cooperation of the pusher table 271, the pusher plate 274, and the sealing baffle 242 respectively, the metal particles / powder can be processed. Compression not only facilitates the discharge of exhaust gas but also compresses the volume of metal particles, making it easier for the compressed metal particles to be discharged from the exhaust gas metal particle filter box 1. By cleaning the metal particles in the filter components 2 one by one, the metal particles can be cleaned without stopping the exhaust gas filtration process, improving the exhaust gas treatment efficiency and realizing automatic cleaning of metal particles. One side of the truncated cone 23 has a guide groove 231 that slides with the guide bar 221. The two guide bars 221 are respectively embedded in the guide groove 211 and the guide groove 231, and the two guide bars 221 are respectively connected to the guide groove 211 and the guide groove 231. 11 and guide groove 231 are slidably connected. A metal filter screen 28 is fixedly connected at the center of one side end of the cylinder 21 near the position between the upper movable cavity 212 and the lower movable cavity 213. The other side wall of the metal filter screen 28 is fixedly connected to the truncated cone 23. A support frame 24 is provided on one side outer wall of the exhaust gas metal particle filter box 1 near the position directly below the through installation groove 16. An electric push rod 241 is provided on the side outer wall of the support frame 24 away from the exhaust gas metal particle filter box 1. A sealing baffle 242 is fixedly connected to the electric push rod 241 through its output end. The sealing baffle 242 and the lower movable cavity 232 are dynamically sealed together. A limiting disc 25 is provided on the other side of the cylinder 21. Several mating holes 251 are evenly spaced circumferentially on one side of the outer wall of the limiting disc 25 near the outer periphery of the cylinder 21. A cylinder 1 26 and a cylinder 27 are provided on the outer wall of the limiting disc 25 away from the cylinder 21. Cylinder 1 26 is located above cylinder 27, and an anti-deformation pusher 261 is fixedly connected to one of its output ends. Cylinder 27 is fixedly connected to a pusher 271 through one of its output ends. A cavity 272 is provided at the top of the pusher 271. Two springs 273 are symmetrically arranged at the bottom of the cavity 272, and a pusher plate 274 is provided at one end of each spring 273. The limiting disc 25 is fixedly connected to the exhaust gas metal particle filter box 1. The anti-deformation pusher 261 and the upper movable cavity 21 are also connected. 2. Dynamic sealing cooperation: After the pusher platform 271 and pusher plate 274 are combined, they are dynamically sealed with the lower movable cavity 213. Under the pushing force of the spring 273, the pusher plate 274 abuts against the bottom of the metal filter screen 28. By using the fixed connection between the limiting disc 25 and the exhaust metal particle filter box 1, the filter assembly 2 can be stably installed on the exhaust metal particle filter box 1. The dynamic sealing cooperation ensures the sealing of the movement of the anti-deformation pusher platform 261, pusher platform 271 and pusher plate 274 in the upper movable cavity 212 and the lower movable cavity 213 respectively, avoiding gas and metal particle powder leakage. By using the abutting pusher plate 274, the metal particle powder accumulated at the bottom of the metal filter screen 28 can be scraped to prevent the metal filter screen 28 from clogging and ensure the exhaust gas treatment efficiency. To clear blockages in the metal filter screen 28, in this embodiment, multiple interlocking filter components 2 in the exhaust gas metal particle filter box 1 form a sheet-like filter structure capable of filtering metal particles and powder from exhaust gas. Each filter component 2 has an independent blockage-clearing capability. By using two arc plates 22 moving towards each other, one side of the space between the cylinder 21, the metal filter screen 28, and the frustum 23 is sealed off, preventing exhaust gas from flowing in while simultaneously scraping and compressing the metal particles and powder accumulated below the metal filter screen 28. This compresses the volume of the metal particles and powder while simultaneously discharging the exhaust gas, preventing pollution caused by the exhaust gas being discharged with the metal particles and powder. By cleaning the metal particles and powder in each filter component 2 individually, exhaust gas filtration can be completed without stopping the process. The process involves cleaning metal particles and powder to improve exhaust gas treatment efficiency and achieve automatic cleaning of metal particles and powder. Specifically, multiple filter components 2 are first installed inside the exhaust gas metal particle filter box 1 and connected to each other. The filter components 2 are inserted through the through-mounting groove 16, and the limiting disc 25 abuts against one side wall of the exhaust gas metal particle filter box 1. Bolts are used to pass through the docking hole 251 and fix them to the exhaust gas metal particle filter box 1. Adjacent filter components 2 are connected by docking blocks 29, and docking ribs 291 and docking grooves 292 are connected by docking blocks 291. Multiple filter components 2 form a sheet-like filter structure inside the exhaust gas metal particle filter box 1 with the ability to filter metal particles and powder in the exhaust gas. Then, the air inlet 12 is connected to the metal surface exhaust gas treatment equipment. The exhaust port is connected to the exhaust port. The exhaust gas generated by metal surface treatment enters the interior of the exhaust gas metal particle filter box 1 through the air inlet 12. The exhaust gas flows from bottom to top inside the exhaust gas metal particle filter box 1. The exhaust gas passes through the metal filter screen 28. The metal particles in the exhaust gas are intercepted by the metal filter screen 28 and filtered below the metal filter screen 28. With long-term filtration, the bottom of the metal filter screen 28 adsorbs and clogs the metal particles. At this time, multiple filter components 2 are controlled to perform a cleaning operation one by one. First, the three-phase motor 295 is controlled to drive the gear 296 to rotate through the output end on one side. Through the meshing transmission between the gear 296 and the gear tooth groove 222, the gear 296 pulls the arc plate 22 to move circumferentially. In the guide groove 1 211 and guide groove 2 23 Under the circumferential guidance of the guide bar 221, the two arc plates 22 move circumferentially towards each other between the cylinder 21 and the frustum 23. As the two arc plates 22 move, they block the space below the metal filter screen 28, preventing exhaust gas from entering the filter assembly 2. Control cylinders 26 and 27 work synchronously. Cylinder 26 drives the anti-deformation pusher 261 to move horizontally and linearly through its output end. The anti-deformation pusher 261 moves along the top of the metal filter screen 28. Cylinder 27 drives the pusher plate 271 to move horizontally and linearly through its output end. Under the thrust of the spring 273, the pusher plate 274 abuts against the bottom of the metal filter screen 28 and moves along the bottom of the metal filter screen 28.As the pusher plate 274 moves, it scrapes off the metal particles and powder at the bottom of the metal filter screen 28. Under the movement of the pusher platform 271, the space between the pusher platform 271 and the sealing baffle 242 continuously decreases, compressing the metal particles and powder between them. Simultaneously, exhaust gas is discharged from between the pusher platform 271 and the sealing baffle 242. Once the metal particles and powder are sufficiently compressed, the sealing baffle 242 moves in tandem until it disengages from the lower movable chamber 232. The pusher platform 271 then pushes the metal particles and powder out of the lower movable chamber 232 into the exhaust gas metal particle filter box 1. After clearing the blockage, the pusher platform 271, the sealing baffle 242, and the arc plate 22 reset, exposing the metal filter screen 28 and allowing it to perform its interception capabilities.

[0020] Example 2 Reference Figure 2 , Figure 6-9 Based on the above embodiments, this embodiment of the invention further proposes that two docking blocks 29 are mirror-image arranged on the outer circumferential surfaces of the cylinder 21 and the frustum 23. One docking block 29 has a docking rib 291 on its outer wall away from the cylinder 21 and the frustum 23, and the other docking block 29 has a docking groove 292 on its outer wall away from the cylinder 21 and the frustum 23. Both the docking rib 291 and the docking groove 292 on the docking block 29 match and fit with the mating groove 17. The docking rib 291 and the docking groove 292 are interlocked. An arc groove is formed on one outer wall of the docking block 29 to dynamically seal with the arc plate 22. After the docking block 29 is inserted into the mating groove 17, the mating groove 17 can be sealed, ensuring the airtightness of the exhaust gas metal particle filter box 1 and preventing exhaust gas from entering the exhaust system. The internal leakage of the gas metal particle filter box 1 is prevented by the use of the arc groove design, which ensures the smooth circumferential movement of the arc plate 22 while ensuring the sealing of the screw joint. The plug-in cooperation between the docking ribs 291 and the docking grooves 292 can realize the combination of adjacent filter components 2, thereby forming a sheet-like filter structure with sealing performance inside the exhaust gas metal particle filter box 1, thereby filtering the metal particle powder in the exhaust gas. The docking block 29 has a groove 293 on the outer wall of the side facing the cylinder 21 and the frustum 23. The inner side wall of the groove 293 is provided with a motor bracket 294. A three-phase motor 295 is provided on one side of the outer wall of the motor bracket 294. The three-phase motor 295 is fixedly connected to a gear 296 through its output end. The gear 296 meshes with the gear tooth groove 222. A horizontal plate 14 is provided on one side of the outer wall of the exhaust gas metal particle filter box 1, near the top of the through-mounting groove 16. An electric push rod 141 is provided on the top of the horizontal plate 14. A scraper plate 142 is fixedly connected to the output end of the electric push rod 141 on one side. The scraper plate 142 and the side wall facing the truncated cone 23 are on the same vertical plane. A waste collection hood 15 is provided on one side of the outer wall of the exhaust gas metal particle filter box 1, near the bottom of the through-mounting groove 16. In order to scrape off the metal particles from the exhaust gas metal particle filter box 1, in this embodiment, the scraper plate 142 can scrape the metal particles pushed out by the pusher platform 271 and the pusher plate 274 vertically downwards, ensuring that all the metal particles fall and are collected inside the waste collection hood 15, thus achieving metal particle powder collection. Specifically, when the metal particles are pushed out of the exhaust gas metal particle filter box 1 from the lower movable cavity 232, they fall into the waste collection hood 15 under the action of gravity. At this time, one side wall of the pusher platform 271, one side wall of the truncated cone 23, one side wall of the scraper plate 142, and the outer side wall of the exhaust gas metal particle filter box 1 are on the same vertical plane. The electric push rod 141 is controlled to drive the scraper plate 142 to move vertically downwards through its output end, and the metal particles adsorbed on the pusher platform 271 are scraped off, ensuring that the pusher platform 271 fully discharges material.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment device for metal surface treatment, comprising a waste gas metal particle filter box (1), wherein a box cover (11) is provided on the top of the waste gas metal particle filter box (1), and an air inlet (12) is provided on the outer wall of one side of the waste gas metal particle filter box (1) near the bottom position, and an air outlet (13) is provided on the outer wall of one side of the waste gas metal particle filter box (1) near the top position, characterized in that: The exhaust gas metal particle filter box (1) has a through mounting groove (16) and a mating groove (17) on one side of its outer wall adjacent to the air inlet (12). The through mounting groove (16) is located on one side of the mating groove (17). An mounting hole (18) is provided on one side of the outer wall of the exhaust gas metal particle filter box (1) near the outer periphery of the through mounting groove (16). A filter assembly (2) is provided on the exhaust gas metal particle filter box (1). The filter assembly (2) includes a cylinder (21) that passes through the through mounting groove (16). A guide groove (211) is provided on one side of the cylinder (21), and an upper movable cavity (212) and a lower movable cavity (213) are provided inside the cylinder (21). The upper movable cavity (212) is located above the lower movable cavity (213). Two arc plates (22) are symmetrically arranged on one side of the cylinder (21). Two guide bars (221) are symmetrically arranged on the outer walls of the two arc plates (22). A wheel is provided on the outer circumference of the arc plate (22) near the guide bars (221). The toothed groove (222) has a frustum (23) on one side away from the cylinder (21) on the two arc plates (22). A lower movable cavity (232) is opened on one side of the frustum (23) near the horizontal side of the lower movable cavity one (213). A guide groove two (231) is opened on one side of the frustum (23) and slides with the guide bar (221). A metal filter screen (28) is fixedly connected to the center of one side of the cylinder (21) near the position between the upper movable cavity (212) and the lower movable cavity one (213). The other side wall of the metal filter screen (28) is fixedly connected to the frustum (23).

2. The waste gas treatment equipment for metal surface treatment according to claim 1, characterized in that: A support frame (24) is provided on one side of the outer wall of the exhaust metal particle filter box (1) at a position directly below the through installation groove (16). An electric push rod (241) is provided on the outer wall of the support frame (24) away from the exhaust metal particle filter box (1). The electric push rod (241) is fixedly connected to a sealing baffle (242) through its output end on one side. The sealing baffle (242) and the lower movable cavity (232) are dynamically sealed together.

3. The waste gas treatment equipment for metal surface treatment according to claim 1, characterized in that: A limiting disc (25) is provided on the other side of the cylinder (21). A plurality of docking holes (251) are provided at equal intervals in the circumferential direction on one side of the outer wall of the limiting disc (25) near the outer periphery of the cylinder (21). A cylinder one (26) and a cylinder two (27) are provided on the outer wall of the limiting disc (25) away from the cylinder (21). The cylinder one (26) is located above the cylinder two (27), and the cylinder one (26) is fixedly connected to an anti-deformation pusher (261) through its output end. The cylinder two (27) is fixedly connected to a pusher (271) through its output end. A cavity (272) is provided on the top of the pusher (271). Two springs (273) are symmetrically arranged at the bottom of the cavity (272). A pusher plate (274) is provided at one end of the two springs (273).

4. The waste gas treatment equipment for metal surface treatment according to claim 3, characterized in that: Two docking blocks (29) are mirror images of the outer circumference of the cylinder (21) and the frustum (23). One of the docking blocks (29) has a docking rib (291) on the outer wall away from the cylinder (21) and the frustum (23). The other docking block (29) has a docking groove (292) on the outer wall away from the cylinder (21) and the frustum (23). The docking block (29) has a groove (293) on the outer wall facing the cylinder (21) and the frustum (23). A motor bracket (294) is provided on the inner side wall of the groove (293). A three-phase motor (295) is provided on one side of the outer wall of the motor bracket (294). A gear (296) is fixedly connected to the output end of the three-phase motor (295) through one side. The gear (296) meshes with the gear tooth groove (222).

5. The waste gas treatment equipment for metal surface treatment according to claim 1, characterized in that: A horizontal plate (14) is provided on one side of the outer wall of the exhaust gas metal particle filter box (1) at a position directly above the through-mounting groove (16). An electric push rod (141) is provided on the top of the horizontal plate (14). A scraper plate (142) is fixedly connected to the output end of the electric push rod (141) on one side. The scraper plate (142) and the side wall facing the truncated cone (23) are on the same vertical plane. A waste collection hood (15) is provided on one side of the outer wall of the exhaust gas metal particle filter box (1) at a position below the through-mounting groove (16).

6. The waste gas treatment equipment for metal surface treatment according to claim 4, characterized in that: The docking ribs (291) and docking grooves (292) on the docking block (29) are matched and fit with the mating groove (17). The docking ribs (291) and docking grooves (292) are inserted and fitted together. An arc groove is provided on one side of the outer wall of the docking block (29) to dynamically seal with the arc plate (22).

7. The waste gas treatment equipment for metal surface treatment according to claim 3, characterized in that: The disc (25) and the exhaust metal particle filter box (1) are fixedly connected. The anti-deformation pusher (261) and the upper movable cavity (212) are dynamically sealed together. The pusher (271) and the pusher plate (274) are combined and dynamically sealed together with the lower movable cavity (213). The pusher plate (274) abuts against the bottom of the metal filter screen (28) under the pushing force of the spring (273).

8. The waste gas treatment equipment for metal surface treatment according to claim 1, characterized in that: The lower movable cavity one (213) and the lower movable cavity two (232) have the same cross-sectional area and shape, and the lower movable cavity one (213) and the lower movable cavity two (232) are on the same horizontal plane and overlap each other.

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