Waste gas suction device for coating processing

Abstract

The utility model relates to the technical field of waste gas treatment devices, and discloses a waste gas suction device for coating processing, which comprises a plurality of support plates, the inner walls of the plurality of support plates are slidably connected with the same ventilation pipe, the bottom of the ventilation pipe is communicated with a plurality of collecting pipes, the outer walls of the plurality of collecting pipes are fixedly connected with a plurality of sliding blocks, and the sliding blocks are fixedly connected with the inner walls of the plurality of support plates. The device comprises a plurality of collecting pipes, the outer walls of the collecting pipes are slidably connected with sliding pipes, the inner walls of the sliding pipes are provided with a plurality of sliding grooves, the bottoms of the sliding pipes communicate with gas collecting hoods, the tops of the gas collecting hoods are fixedly connected with telescopic pipes, and the outer walls of the sliding pipes are fixedly connected with fixing blocks. According to the gas collecting hood, the rotating handle is rotated to drive the screw rod to rotate, and the height of the gas collecting hood is adjusted through linkage among the screw block, the connecting plate, the connecting ring, the fixed block, the sliding pipe, the sliding block, the sliding groove and the telescopic pipe so as to adapt to the environment and efficiently collect waste gas.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment devices, and in particular to a waste gas extraction device for paint processing. Background Technology

[0002] Paints and coatings are chemical mixtures that can firmly cover the surface of objects, serving protective, decorative, marking, and other special purposes. During the production of paints and coatings, a large amount of waste gas containing volatile organic compounds is generated. Waste gas extraction devices for paint processing are specialized equipment used to collect and treat the waste gas generated during the paint production process. Timely collection of these waste gases can protect the health of workshop workers, prevent the waste gas from corroding the equipment in the workshop, and effectively reduce the amount of harmful gases emitted from the workshop to the outside world, thus reducing pollution to the surrounding atmospheric environment.

[0003] A search revealed Chinese patent publication number CN216604602U, which discloses a waste gas treatment device and its usage method for a tape production workshop. The device includes multiple extraction hoods, each mounted above a corresponding processing equipment. All extraction hoods are connected to a manifold, the end of which is connected to a waste gas treatment box. The waste gas treatment box is connected to an extraction pump, and an exhaust pipe is installed at the outlet of the extraction pump, extending into a washing tank. The waste gas treatment box includes a body with an installation port at the top. A filter element, including a cover plate, is installed at the installation port. The cover plate has multiple filter plates on the bottom surface, which are evenly spaced along the length of the cover plate. The length of the filter plates is adapted to the distance between the two inner walls of the box. The cover plate can seal the installation port. The exhaust gas entering the exhaust gas treatment box passes through multiple filter plates and is then discharged. Its structure is novel and can suck up and purify exhaust gas generated by multiple devices and multiple locations. Its filter components can be easily disassembled and installed for cleaning or replacement. However, the exhaust hood and manifold of this device are fixedly connected and cannot be adjusted in height, so it cannot adapt well to various complex equipment shapes and exhaust gas generation areas. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a waste gas extraction device for paint processing, which aims to improve the problem that the extraction hood and manifold of the existing device are fixedly connected, the height cannot be adjusted, and it cannot adapt well to various complex equipment shapes and waste gas generation areas.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a waste gas extraction device for coating processing, comprising multiple support plates, the inner walls of the multiple support plates being slidably connected to the same ventilation pipe, the bottom of the ventilation pipe being connected to multiple manifolds, the outer walls of the multiple manifolds being fixedly connected to multiple sliders, the outer walls of the multiple manifolds being slidably connected to sliding tubes, the inner walls of the multiple sliding tubes being provided with multiple sliding grooves, the bottoms of the multiple sliding tubes being connected to a gas collecting hood, the tops of the multiple gas collecting hoods being fixedly connected to a telescopic tube, the outer walls of the multiple sliding tubes being fixedly connected to a fixing block, the inner walls of the multiple fixing blocks being slidably connected to a screw rod, the outer walls of the multiple screw rods being threadedly connected to two screw blocks, the tops of the multiple screw blocks being rotatably connected to a connecting plate, the tops of the multiple connecting plates being rotatably connected to a connecting ring, the outer walls of the multiple screw rods being fixedly connected to a throttle handle, and the outer walls of the multiple gas collecting hoods being provided with multiple support mechanisms.

[0006] The above technical solution can construct a stable and flexible exhaust gas extraction structure. The ventilation pipe and support plate work together to achieve flexible placement. The manifold and sliding pipe work together to accurately collect exhaust gas. The support mechanism ensures the stability of the gas collection hood. All components work together to adapt to complex workshop environments and efficiently extract exhaust gas.

[0007] As a further description of the above technical solution:

[0008] The support mechanism includes a rotating shaft, the outer wall of which is fixedly connected to the outer wall of the gas collection hood. An inner tube is rotatably connected to the outer wall of the rotating shaft. A retaining ring is fixedly connected to the outer wall of the inner tube. An outer tube is slidably connected to the bottom of the inner tube. A screw ring is threadedly connected to the top of the outer tube. A hook groove is provided at the bottom of the outer tube.

[0009] Through the above technical solutions, the support mechanism 2 can be switched between multiple forms. The rotating shaft gives the inner tube the ability to rotate to adapt to different working conditions. The sliding cooperation between the inner and outer tubes and the adjustment of the screw ring can accurately control the support length. The hook groove provides an interface for hoisting connection, ensuring the stable support and convenient relocation of the gas collection hood in all aspects.

[0010] As a further description of the above technical solution:

[0011] Each of the gas collection hoods is fixedly connected to a fan at its top, and the bottom of the ventilation duct is connected to an adsorption box.

[0012] The above technical solution uses a fan as a power source to forcefully draw in exhaust gas, causing it to converge into the gas collection hood. The adsorption box then undertakes the purification task, using internal adsorption materials to deeply treat the exhaust gas, thus achieving a one-stop function from exhaust gas collection to purification.

[0013] As a further description of the above technical solution:

[0014] The front side of the adsorption box is slidably connected to multiple drawers, and the outer walls of the multiple drawers are threaded with multiple screws.

[0015] The above technical solution facilitates the replacement and maintenance of the adsorption material through the drawer design, and the screws secure the drawer to ensure stable operation. The combination of these two features ensures the adsorption box's ability to continuously and efficiently purify waste gas.

[0016] As a further description of the above technical solution:

[0017] Each of the drawers has a handle fixedly connected to its outer wall, and the right side of the adsorption box is connected to an air outlet.

[0018] The above technical solution provides operators with a convenient point of leverage to replace the adsorption material, while the air outlet serves as a dedicated channel for the purified exhaust gas to be discharged, ensuring the orderly discharge of compliant exhaust gas and maintaining the smooth operation of the entire device.

[0019] As a further description of the above technical solution:

[0020] A controller is fixedly connected to the right side of the outer wall of the adsorption box, and a damper is fixedly connected to the outer wall of the rotating shaft.

[0021] Through the above technical solutions: the controller intelligently regulates the fan and adsorption box, optimizes operating parameters according to workshop conditions, improves suction and purification efficiency, and the damper effectively controls the speed and amplitude of the inner tube's rotation around the shaft, preventing component collision damage, extending the service life of the support mechanism, and improving the overall reliability of the device.

[0022] As a further description of the above technical solution:

[0023] The bottom of the outer tube is fixedly connected with a pad, and the outer wall of the screw ring is fixedly connected with multiple anti-slip strips.

[0024] The above technical solutions increase the contact area and friction between the feet and the ground, enhancing the stability of the support mechanism. The anti-slip strips increase the friction between the hand and the screw ring, making it easier for operators to accurately apply force to adjust the support length and optimizing operational convenience.

[0025] As a further description of the above technical solution:

[0026] A steel cable is slidably connected to the outer side of the hook groove, and multiple fixing cables are fixedly connected to the outer wall of the steel cable.

[0027] The above technical solution enables the support mechanism to suspend and lift objects by combining steel cables and hook grooves, while the fixing cable enhances the load-bearing capacity of the steel cable, ensuring safety and reliability during the lifting process, and the assist device can be flexibly arranged and adjusted in the workshop.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the screw is rotated by turning the throttle, and the height of the gas collection hood is adjusted by the linkage between the screw block, connecting plate, connecting ring, fixing block, slide tube, slider, slide groove and telescopic tube to efficiently collect waste gas in order to adapt to the environment. At the same time, the negative pressure is formed by the operation of the fan to collect waste gas. The waste gas is then introduced into the adsorption box filled with activated carbon through the telescopic tube, slide tube, manifold and ventilation tube to purify the waste gas.

[0030] 2. In this utility model, the engagement of the screw ring with the retaining ring on the inner tube and its movement along the outer wall of the outer tube realize the flexible adjustment of the combined length of the inner and outer tubes, thereby realizing the flexible adjustment of the height of the gas collecting hood to adapt to different working conditions and ensuring the stable working state of the gas collecting hood. Attached Figure Description

[0031] Figure 1 This is a three-dimensional schematic diagram of a waste gas extraction device for coating processing proposed in this utility model;

[0032] Figure 2 This is a partial structural diagram of a waste gas extraction device for coating processing proposed in this utility model;

[0033] Figure 3 This is a cross-sectional view of the slide tube of a waste gas extraction device for coating processing proposed in this utility model;

[0034] Figure 4 This is a schematic diagram of the connecting plate of a waste gas extraction device for coating processing proposed in this utility model;

[0035] Figure 5 This is a schematic diagram of the adsorption box of a waste gas extraction device for coating processing proposed in this utility model;

[0036] Figure 6 This is a schematic diagram of the support mechanism of a waste gas extraction device for coating processing proposed in this utility model.

[0037] Legend:

[0038] 1. Support plate; 2. Support mechanism; 201. Rotating shaft; 202. Inner tube; 203. Snap ring; 204. Outer tube; 205. Tightening ring; 206. Hook groove; 3. Ventilation pipe; 4. Manifold; 5. Slider; 6. Sliding tube; 7. Sliding groove; 8. Gas collection hood; 9. Telescopic tube; 10. Fixing block; 11. Screw; 12. Screw block; 13. Connecting plate; 14. Connecting ring; 15. Turning handle; 16. Fan; 17. Adsorption box; 18. Drawer; 19. Screw; 20. Pull handle; 21. Air outlet; 22. Controller; 23. Damper; 24. Foot pad; 25. Anti-slip strip; 26. Steel cable; 27. Fixing cable. Detailed Implementation

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

[0040] See attached document Figure 2 Appendix Figure 3 and attached Figure 4 This utility model provides an embodiment of a waste gas extraction device for paint processing, comprising multiple support plates 1, each with a slidably connected ventilation pipe 3 on its inner wall. The support plates 1 support the ventilation pipe 3. The bottom of the ventilation pipe 3 is connected to multiple manifolds 4 to facilitate the collection and aggregation of waste gas. Multiple sliders 5 are fixedly connected to the outer walls of the multiple manifolds 4, and sliding tubes 6 are slidably connected to the outer walls of the multiple manifolds 4, providing a smooth passage for waste gas flow. Multiple grooves 7 are formed on the inner walls of the multiple sliding tubes 6, which closely cooperate with the sliders 5 to guide the orderly sliding of the manifolds 4. A gas collection hood 8 is connected to the bottom of each of the multiple sliding tubes 6. The gas collection hood 8, as a component directly contacting the waste gas generation area, can collect waste gas generated during paint processing in a large area and efficiently, preventing waste gas from escaping. Telescopic tubes 9 are fixedly connected to the top of each of the multiple gas collection hoods 8. The telescopic tubes 9, with their excellent telescopic performance, adjust the degree of extension to closely fit the waste gas generation area. The multiple sliding tubes 6... Each of the outer walls is fixedly connected to a fixing block 10, which provides a stable installation base for the subsequent adjustment components. Each of the inner walls of the fixing blocks 10 is slidably connected to a screw 11. The screw 11 is the core transmission component for adjustment. When rotating, it can be accurately converted into linear motion to drive the displacement of related components. Each of the outer walls of the screw 11 is threadedly connected to two screw blocks 12. Since the screws on the outer walls of the screw 11 rotate in opposite directions, the two screw blocks 12 will move closer or further away as the screw 11 rotates, achieving precise push and pull control of the connecting components. Each of the tops of the screw blocks 12 is rotatably connected to a connecting plate 13. The connecting plate 13 plays the role of force transmission and conversion. Each of the tops of the connecting plates 13 is rotatably connected to a connecting ring 14. The top of the connecting ring 14 is fixedly connected to the bottom of the support plate 1. Each of the outer walls of the screw 11 is fixedly connected to a handle 15. The handle 15 provides a convenient operating handle for the operator to easily apply force to rotate the screw 11. Each of the outer walls of the multiple gas collection hoods 8 is provided with multiple support mechanisms 2.

[0041] Specifically, multiple manifolds 4 at the bottom of the ventilation duct 3 quickly gather exhaust gas. The manifolds 4 are precisely matched with the sliding grooves 7 of the sliding tube 6 by means of the slider 5, and their height can be freely adjusted. The gas collection hood 8, as the front-end collection component, has the ability to capture paint processing exhaust gas over a large area, effectively preventing exhaust gas from escaping. Its top telescopic tube 9 can be flexibly extended and retracted. When the screw 11 rotates, it can drive the screw block 12 to precisely displace according to the opposite thread. The force is cleverly transmitted through the connecting plate 13 and the connecting ring 14, causing the sliding tube 6 to drive the gas collection hood 8 to precisely adjust its shape.

[0042] See attached document Figure 1 Appendix Figure 2 and attached Figure 6 The support mechanism 2 includes a rotating shaft 201. The outer wall of the rotating shaft 201 is fixedly connected to the outer wall of the gas collecting hood 8, allowing the inner tube 202 to rotate flexibly around the rotating shaft 201 as the axis. This facilitates quick position switching of the support mechanism 2 under different working conditions. The outer wall of the rotating shaft 201 is rotatably connected to the inner tube 202. As an important component of the support structure, the inner tube 202 is responsible for connecting other key components and transmitting force. The outer wall of the inner tube 202 is fixedly connected to a retaining ring 203. The retaining ring 203 cooperates with a screw ring 205 to precisely limit the sliding range of the inner tube 202, ensuring that the inner tube 202 will not detach from the outer tube 204 during adjustment, thus maintaining structural stability. The bottom of the inner tube 202 is slidably connected to the outer tube 204. The outer tube 204 and the inner tube 202 work together, and the length is adjusted through their relative sliding. The top of the outer tube 204 is threadedly connected to a screw ring 205. 05, as an adjustment component, utilizes the principle of threaded transmission to precisely control the relative position of the outer tube 204 and the inner tube 202, achieving fine adjustment. The bottom of the outer tube 204 is provided with a hook groove 206, which provides an interface for the support mechanism 2 to connect with external hoisting facilities. It can be easily hung on the steel cable 26, facilitating rapid relocation with external force. The bottom of the outer tube 204 is fixedly connected with a pad 24, which increases the contact area and friction with the ground. When the support mechanism 2 is supported on the ground, it can stably support the gas collection hood 8 and its accessories, preventing the device from shaking. The outer wall of the screw ring 205 is fixedly connected with multiple anti-slip strips 25, which increases the friction between the hand and the screw ring 205. The outer side of the hook groove 206 is slidably connected with a steel cable 26. The steel cable 26, as a hoisting auxiliary facility pre-built in the workshop, works with the hook groove 206 to enable the support mechanism 2 to be smoothly converted into a suspension support unit.

[0043] Specifically, the rotating shaft 201 connects the inner tube 202 to the outer wall of the gas collection hood 8, giving the inner tube 202 flexible steering performance. The retaining ring 203 and the screw ring 205 cooperate to precisely limit the range of motion of the inner tube 202. Through relative sliding with the outer tube 204, the overall length can be flexibly adjusted according to actual needs to ensure the stable operation of the gas collection hood 8.

[0044] See attached document Figure 1 Appendix Figure 2 and attached Figure 5 Multiple gas collection hoods 8 are fixedly connected to the top of a fan 16, which serves as the key source of suction power. The bottom of the ventilation pipe 3 is connected to an adsorption box 17, which is filled with activated carbon to effectively purify the flowing exhaust gas and reduce environmental pollution. Multiple drawers 18 are slidably connected to the front of the adsorption box 17. The design of the drawers 18 facilitates the replacement and maintenance of the adsorption material. Multiple screws 19 are threaded to the outer wall of the multiple drawers 18 for fastening. Pull handles 20 are fixedly connected to the outer wall of the multiple drawers 18, providing convenient leverage points for operators. An air outlet 21 is connected to the right side of the adsorption box 17. 1 serves as a channel for the exhaust gas after purification, ensuring that the exhaust gas is discharged into the external environment in an orderly manner after being treated to meet the standards by the adsorption box 17. A controller 22 is fixedly connected to the right side of the outer wall of the adsorption box 17. The controller 22 intelligently controls the fan 16 and the adsorption box 17. A damper 23 is fixedly connected to the outer wall of the rotating shaft 201. The damper 23 can effectively control the speed and amplitude of the inner tube 202 rotating around the rotating shaft 201, avoiding damage to the components due to excessive rotation or excessive amplitude, and extending the service life of the support mechanism 2. Multiple fixing cables 27 are fixedly connected to the outer wall of the steel cable 26. The fixing cables 27 play a role in assisting in fixing the steel cable 26 and enhancing the load-bearing capacity of the steel cable 26.

[0045] Specifically, the high-speed operation of the fan 16 generates significant negative pressure, quickly gathering the exhaust gas into the gas collection hood 8. The activated carbon inside the adsorption box 17 has fine adsorption performance, which can intercept and decompose harmful substances, purify the exhaust gas, and reduce the risk of pollution. The drawer 18 facilitates the replacement of adsorption materials, ensuring stable purification performance. The screw 19 can tighten the drawer 18 during equipment operation, cope with vibration and airflow impact, and maintain the stability of the internal structure. The air outlet 21 is the exhaust gas discharge channel after purification. Strict control of the discharge point ensures that only qualified exhaust gas can be discharged into the outside, eliminating the risk of secondary pollution. The controller 22 on the outer wall of the adsorption box 17 can monitor the working conditions in real time and accurately adjust the suction force of the fan 16 and the purification rhythm of the adsorption box 17 to achieve high efficiency and energy saving. The damper 23 can buffer the rotational impact of the inner tube 202, precisely limit the speed, avoid hard collisions of components, and extend the life of the support mechanism 2.

[0046] Working principle: After the device is started, the fan 16 at the top of the gas collection hood 8 starts operating first, forming a negative pressure area around the gas collection hood 8, causing the exhaust gas to gather in the gas collection hood 8. The exhaust gas enters the slide pipe 6 through the telescopic pipe 9, flows upward into the ventilation pipe 3 through the manifold 4, and then enters the adsorption box 17 connected to its bottom through the ventilation pipe 3. The box is filled with activated carbon as adsorption material, which effectively adsorbs volatile organic compounds and harmful particulate matter in the exhaust gas, deeply purifying the exhaust gas. In addition, when it is necessary to adjust the height of the gas collection hood 8 according to the shape of the equipment, the operator turns the handle 15 to drive the screw 11 to rotate. Since there are two screw blocks 12 connected to the outer wall of the screw 11, and the threads on both sides of the screw 11 are opposite, as the screw 11 rotates, the two screw blocks 12 will move closer together. Whether near or far, the screw block 12 is rotatably connected to the connecting plate 13, and the connecting plate 13 is rotatably connected to the connecting ring 14. The top of the connecting ring 14 is fixedly connected to the bottom of the support plate 1. When the two screw blocks 12 move horizontally on the screw 11, the connecting plate 13 rotates accordingly, and the longitudinal distance between the connecting ring 14 and the connecting plate 13 changes, thereby driving the screw 11, the fixed block 10 and the slide tube 6 to move up and down. At the same time, the slider 5 slides in the slide groove 7. The bottom of the telescopic tube 9 is connected to the top of the gas collection hood 8, and its top is connected to the bottom of the manifold 4. When the slide tube 6 moves up and down, the telescopic tube 9 follows its extension and retraction. The up and down movement of the slide tube 6 makes the height of the gas collection hood 8 adjustable, so that it can perfectly adapt to the complex and ever-changing paint processing site environment and efficiently collect exhaust gas.

[0047] Furthermore, when an exhaust gas extraction device needs to be installed or routinely maintained, the support mechanism 2 plays a crucial ground support role. The distance adjustment between the inner pipe 202 and the outer pipe 204 further ensures the height adjustment of the gas collection hood 8. When the operator manually rotates the screw ring 205, the multiple anti-slip strips 25 on the outer wall of the screw ring 205 provide sufficient friction, making it easy to apply force. As the screw ring 205 rotates, it moves up and down along the outer wall of the outer pipe 204. The inner wall of the screw ring 205 engages with the retaining ring 203 on the inner pipe 202, thereby pulling the inner pipe 202 along... The inner wall of the outer tube 204 slides, so the combined length of the inner tube 202 and the outer tube 204 can be flexibly adjusted according to the actual situation, ensuring that the gas collection hood 8 is always in a horizontal and stable working state. When the layout of the workshop is adjusted, the inner tube 202 is rotated to the top position of the gas collection hood 8 through the pivot 201, and the hook groove 206 opened at the bottom of the outer tube 204 is aligned and smoothly slidably connected to the steel cable 26. The steel cable 26 is a hoisting auxiliary facility pre-built in the workshop. The support mechanism 2 is transformed from a ground support component into a suspended support unit, which is convenient to use external hoisting power.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste gas extraction device for paint processing, comprising multiple support plates (1), characterized in that: The inner walls of multiple support plates (1) are slidably connected to the same ventilation pipe (3). The bottom of the ventilation pipe (3) is connected to multiple manifolds (4). The outer walls of the multiple manifolds (4) are fixedly connected to multiple sliders (5). The outer walls of the multiple manifolds (4) are slidably connected to sliding tubes (6). The inner walls of the multiple sliding tubes (6) are provided with multiple sliding grooves (7). The bottoms of the multiple sliding tubes (6) are connected to air collection hoods (8). The tops of the multiple air collection hoods (8) are fixedly connected to telescopic tubes (9). (6) The outer wall of each of the above is fixedly connected to a fixing block (10), the inner wall of each of the fixing blocks (10) is slidably connected to a screw (11), the outer wall of each of the screws (11) is threadedly connected to two screw blocks (12), the top of each of the screw blocks (12) is rotatably connected to a connecting plate (13), the top of each of the connecting plates (13) is rotatably connected to a connecting ring (14), the outer wall of each of the screws (11) is fixedly connected to a throttle (15), and the outer wall of each of the gas collecting hoods (8) is provided with multiple support mechanisms (2).

2. The waste gas extraction device for coating processing according to claim 1, characterized in that: The support mechanism (2) includes a rotating shaft (201), the outer wall of which is fixedly connected to the outer wall of the gas collection hood (8), the outer wall of which is rotatably connected to an inner tube (202), the outer wall of which is fixedly connected to a retaining ring (203), the bottom of which is slidably connected to an outer tube (204), the top of which is threadedly connected to a screw ring (205), and the bottom of which is provided with a hook groove (206).

3. The waste gas extraction device for coating processing according to claim 1, characterized in that: A fan (16) is fixedly connected to the top of each of the gas collection hoods (8), and an adsorption box (17) is connected to the bottom of the ventilation pipe (3).

4. The waste gas extraction device for coating processing according to claim 3, characterized in that: The front side of the adsorption box (17) is slidably connected to multiple drawers (18), and the outer walls of the multiple drawers (18) are threaded with multiple screws (19).

5. The waste gas extraction device for coating processing according to claim 4, characterized in that: Each of the drawers (18) has a handle (20) fixedly connected to its outer wall, and the right side of the adsorption box (17) is connected to an air outlet (21).

6. The waste gas extraction device for coating processing according to claim 3, characterized in that: A controller (22) is fixedly connected to the right side of the outer wall of the adsorption box (17).

7. The waste gas extraction device for coating processing according to claim 2, characterized in that: The bottom of the outer tube (204) is fixedly connected with a pad (24), the outer wall of the screw ring (205) is fixedly connected with multiple anti-slip strips (25), and the outer wall of the rotating shaft (201) is fixedly connected with a damper (23).

8. The waste gas extraction device for coating processing according to claim 7, characterized in that: A steel cable (26) is slidably connected to the outer side of the hook groove (206), and a plurality of fixing cables (27) are fixedly connected to the outer wall of the steel cable (26).

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