Coating waste gas treatment equipment

By designing the scum collection mechanism of the coating waste gas treatment equipment, and using the drive mechanism to collect and remove the liquid surface scum, the problem of poor exhaust caused by the thickening of the scum in the coating waste gas treatment is solved, and the efficient operation of the waste gas treatment is maintained.

CN120325020AInactive Publication Date: 2025-07-18JIANGSU NUOSHENG ENVIRONMENTAL PROTECTION TECH
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Patent Information

Application Number
CN202510494294.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-20
Publication Date
2025-07-18
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The slag on the liquid surface of the existing coating waste gas treatment gradually thickens, affecting the efficiency of the waste gas treatment and leading to poor exhaust gas exhaust.

Method used

A coating waste gas treatment equipment is designed, including a scum collection mechanism, which uses a driving mechanism to drive the collection cylinder to move and rotate, collect the scum on the liquid surface through the collection tank, and put it into the collection chamber to avoid the exhaust gas caused by excessive thickness of scum.

Benefits of technology

The scum is cleaned in time, and the waste gas treatment efficiency is maintained, and the exhaust gas is not smooth due to excessive scum is avoided.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of waste gas treatment equipment, in particular to coating waste gas treatment equipment which comprises a tank body, a treatment cavity is formed in the upper portion of the tank body, a collection cavity is formed in the lower portion of the tank body, a blow-off pipe is arranged on the inner bottom face of the treatment cavity, and the blow-off pipe is used for connecting the treatment cavity with the collection cavity. A scum collecting mechanism is arranged on the outer surface of the blow-off pipe and can collect scum on the water surface, and the scum is thrown into the collecting cavity through the blow-off pipe; when scum floating on the liquid level is treated, the driving mechanism is used for driving the collecting groove in the collecting barrel to move to the liquid level of treatment liquid, and when the driving mechanism is used for driving the outer sleeve and the collecting barrel to rotate, the scum collecting mechanism is driven by the driving mechanism to move to the liquid level of the treatment liquid. And the scum floating on the liquid surface can enter the collecting barrel through the collecting tank, so that the scum floating on the liquid surface can be cleaned in time, and unsmooth exhaust caused by too thick scum is avoided.
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Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment equipment, and particularly to a coating waste gas treatment equipment. Background Art

[0002] Coating waste gas treatment refers to the treatment of waste gas containing organic matters such as paint substances and additives emitted during various processes such as painting in a painting workshop. The coating waste gas has a strong odor, great harm to the human body, and serious environmental pollution, which will affect the nearby residents and needs to be purified before being discharged. At present, when treating coating waste gas, a high-pressure blower is used to suck the coating waste gas into the waste gas treatment liquid in the treatment tower. The waste gas treatment liquid can wash out particulate impurities such as dust in the waste gas. After the existing waste gas treatment liquid has treated the waste gas for a period of time, the scum on the liquid surface will gradually thicken, which will hinder the discharge of gas in the treatment liquid, thereby affecting the waste gas treatment efficiency. For this reason, a coating waste gas treatment equipment is proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide a coating waste gas treatment equipment to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A coating waste gas treatment equipment, including a tank body, a treatment chamber is arranged at the upper part of the tank body, a collection chamber is arranged at the lower part of the tank body, a sewage discharge pipe is arranged on the inner bottom surface of the treatment chamber, the sewage discharge pipe is used to connect the treatment chamber and the collection chamber, and a scum collection mechanism is arranged on the outer surface of the sewage discharge pipe. The scum collection mechanism can collect the scum on the water surface and put the scum into the collection chamber through the sewage discharge pipe. The scum collection mechanism includes an outer sleeve tube sleeved on the outer surface of the sewage discharge pipe, a driving mechanism is arranged at the top of the tank body, the driving mechanism can drive the outer sleeve tube to move up and down or rotate, a plurality of collection cylinders are arranged at the top of the outer sleeve tube, one end of the collection cylinder is located inside the outer sleeve tube, filter holes are evenly distributed on the outer surface of the end of the collection cylinder located outside the outer sleeve tube, and a collection groove is arranged on the outer surface of the outer sleeve tube along the direction parallel to the water surface.

[0005] Preferably, the scum collection mechanism further includes rotating shafts fixedly installed on both sides of the collection cylinder, the rotating shafts are located inside the outer sleeve tube, the ends of the rotating shafts are rotatably connected with connecting plates, the upper ends of the connecting plates are fixedly connected with the top of the outer sleeve tube, torsion springs are sleeved on the outer surfaces of the rotating shafts, one end of the torsion spring is fixedly connected with the collection cylinder, the other end of the torsion spring is fixedly connected with the connecting plate, and a plurality of fixing plates are fixedly connected to the inner surface top of the collection chamber. The fixing plates are arranged in one-to-one correspondence with the collection cylinders.

[0006] Preferably, the outer surface of the outer sleeve is provided with an opening, the opening is arranged in one-to-one correspondence with the collecting tube, a flexible baffle is fixedly connected to the inside of each opening, a groove body adapted to the collecting tube is provided in the center of the flexible baffle, and the collecting tube is fixedly installed inside the groove body.

[0007] Preferably, a blocking mechanism is provided inside the outer sleeve, and the blocking mechanism is used to block one end of the collecting tube located inside the outer sleeve.

[0008] Preferably, the blocking mechanism comprises an electric cylinder fixedly mounted on the top of the outer sleeve, the telescopic end of the electric cylinder is fixedly connected with a blocking block, and a groove matching the blocking block is formed on the top of the outer sleeve.

[0009] Preferably, the driving mechanism includes a first transmission wheel rotatably mounted on the top of the tank body, the upper surface of the tank body is fixedly connected to a machine base, the upper surface of the machine base is fixedly connected to a motor, the output shaft of the motor is fixedly connected to a second transmission wheel, a conveyor belt is commonly provided on the outer surfaces of the first transmission wheel and the second transmission wheel, an electric push rod is fixedly connected to the middle of the first transmission wheel, and the telescopic end of the electric push rod is fixedly connected to the outer sleeve.

[0010] Preferably, it further comprises a control mechanism, wherein the control mechanism comprises a sensor fixedly mounted on the outer surface of the first transmission wheel, and the upper surface of the tank body is fixedly connected with a first position sensor and a second position sensor in sequence along the rotation direction of the sensor.

[0011] Preferably, when the sensor is aligned with the first position sensor, the collecting tube is aligned with the fixing plate, and when the sensor is aligned with the second position sensor, the collecting tube is staggered with the fixing plate.

[0012] Preferably, an air inlet pipe, a discharge pipe, a drain pipe, a water inlet pipe and an exhaust pipe are fixedly connected on the surface of the tank body; the air inlet pipe and the drain pipe are located at the bottom of the processing chamber and are connected to the processing chamber, the exhaust pipe is located at the top of the processing chamber and is connected to the processing chamber, the water inlet pipe is located in the middle of the processing chamber and is connected to the processing chamber, the discharge pipe is located at the bottom of the collecting chamber and is connected to the collecting chamber, and valve bodies are provided inside the air inlet pipe, the discharge pipe, the drain pipe, the water inlet pipe and the exhaust pipe.

[0013] Preferably, a sealing sleeve is fixedly connected to the bottom of the outer sleeve, and the sealing sleeve is slidably and sealingly matched with the sewage pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: When the present invention is dealing with the scum floating on the liquid surface, the driving mechanism drives the collecting groove on the collecting cylinder to move to the liquid surface of the treatment liquid. When the driving mechanism drives the outer sleeve pipe and the collecting cylinder to rotate, the scum floating on the liquid surface can enter the interior of the collecting cylinder through the collecting groove, so that the scum floating on the liquid surface can be cleaned in time, avoiding poor exhaust caused by too thick scum. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 is the present invention Figure 2 schematic diagram of the partial structure in; Figure 4 is a schematic diagram of the partial structure of the scum collection mechanism of the present invention; Figure 5 is a schematic diagram of the structure of the driving mechanism and the control mechanism of the present invention; Figure 6 is the present invention Figure 2 enlarged view of part A in; Figure 7 is a schematic diagram of the structure of the plugging mechanism of the present invention.

[0016] In the drawings, the list of components represented by each reference numeral is as follows: 1. Tank body; 101. Treatment chamber; 102. Collection chamber; 103. Drain pipe; 2. Scum collection mechanism; 21. Outer sleeve pipe; 22. Collection cylinder; 23. Filter holes; 24. Collection groove; 25. Opening; 26. Flexible baffle; 27. Rotating shaft; 28. Torsion spring; 29. Connecting plate; 3. Driving mechanism; 31. Electric push rod; 32. First transmission wheel; 33. Second transmission wheel; 34. Machine base; 35. Motor; 36. Conveyor belt; 4. Control mechanism; 41. Inductor; 42. First position sensor; 43. Second position sensor; 5. Fixed plate; 6. Plugging mechanism; 61. Groove; 62. Electric cylinder; 63. Plugging block; 7. Air inlet pipe; 8. Discharge pipe; 9. Drain pipe; 10. Water inlet pipe; 11. Exhaust pipe; 12. Sealing sleeve. DETAILED DESCRIPTION OF THE INVENTION

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-7, a coating waste gas treatment device shown in the figure includes a tank body 1, a treatment chamber 101 is arranged on the upper part of the tank body 1, a collection chamber 102 is arranged on the lower part of the tank body 1, a sewage pipe 103 is arranged on the bottom surface of the treatment chamber 101, the sewage pipe 103 is used to connect the treatment chamber 101 and the collection chamber 102, and a scum collecting mechanism 2 is arranged on the outer surface of the sewage pipe 103, and the scum collecting mechanism 2 can collect scum on the water surface and put the scum into the collection chamber 102 through the sewage pipe 103; Furthermore, the scum collection mechanism 2 includes an outer sleeve 21 sleeved on the outer surface of the sewage pipe 103, and a driving mechanism 3 is arranged on the top of the tank body 1, which can drive the outer sleeve 21 to move up and down or rotate. A plurality of collection cylinders 22 are arranged on the top of the outer sleeve 21, and one end of the collection cylinder 22 is located inside the outer sleeve 21. The outer surface of the end of the collection cylinder 22 located outside the outer sleeve 21 is provided with evenly distributed filter holes 23, and the outer surface of the outer sleeve 21 is provided with a collection groove 24 in a direction parallel to the water surface.

[0019] Furthermore, an air inlet pipe 7, a discharge pipe 8, a drain pipe 9, a water inlet pipe 10 and an exhaust pipe 11 are fixedly connected on the surface of the tank body 1; the air inlet pipe 7 and the drain pipe 9 are located at the bottom of the processing chamber 101 and are connected to the processing chamber 101; the exhaust pipe 11 is located at the top of the processing chamber 101 and is connected to the processing chamber 101; the water inlet pipe 10 is located in the middle of the processing chamber 101 and is connected to the processing chamber 101; the discharge pipe 8 is located at the bottom of the collecting chamber 102 and is connected to the collecting chamber 102; and valve bodies are provided inside the air inlet pipe 7, the discharge pipe 8, the drain pipe 9, the water inlet pipe 10 and the exhaust pipe 11.

[0020] Furthermore, the driving mechanism 3 includes a first transmission wheel 32 rotatably mounted on the top of the tank body 1, a base 34 is fixedly connected to the upper surface of the tank body 1, a motor 35 is fixedly connected to the upper surface of the base 34, an output shaft of the motor 35 is fixedly connected to a second transmission wheel 33, a conveyor belt 36 is commonly sleeved on the outer surfaces of the first transmission wheel 32 and the second transmission wheel 33, an electric push rod 31 is fixedly connected to the middle of the first transmission wheel 32, and the telescopic end of the electric push rod 31 is fixedly connected to the outer sleeve 21.

[0021] Furthermore, it also includes a control mechanism 4, which includes a sensor 41 fixedly installed on the outer surface of the first transmission wheel 32, and a first position sensor 42 and a second position sensor 43 are fixedly connected to the upper surface of the tank body 1 in sequence along the rotation direction of the sensor 41.

[0022] Furthermore, when the sensor 41 is aligned with the first position sensor 42 , the collecting tube 22 is aligned with the fixing plate 5 , and when the sensor 41 is aligned with the second position sensor 43 , the collecting tube 22 is staggered with the fixing plate 5 .

[0023] In this embodiment, the motor 35 is used to drive the second transmission wheel 33 to rotate, which can drive the conveyor belt 36, the first transmission wheel 32, the electric push rod 31 and the outer sleeve 21 to rotate, and then drive the collection cylinder 22 to rotate. The collection cylinder 22 can collect the scum floating on the liquid surface. In addition, by driving the electric push rod 31 to expand and contract, the outer sleeve 21 can be driven to move up and down to adjust the height of the collection cylinder 22.

[0024] In addition, by setting the sensor 41, the first position sensor 42 and the second position sensor 43 to cooperate with each other, the sensing end of the sensor 41 can emit infrared rays. Infrared receiving ends are provided on both the first position sensor 42 and the second position sensor 43. The first position sensor 42 and the second position sensor 43 can determine the position of the sensor 41 by receiving the infrared rays emitted by the sensor 41.

[0025] In this embodiment, the waste gas treatment liquid is poured into the treatment chamber 101 through the water inlet pipe 10. It should be noted that the height of the waste gas treatment liquid surface should not exceed the height of the sewage discharge pipe 103. Then, the waste gas is introduced into the waste gas treatment liquid through the air inlet pipe 7. The treatment liquid will filter out impurities such as dust and particles in the waste gas. These dust and particles float to the water surface of the treatment liquid and gather to form scum. When treating the scum, the driving mechanism 3 is used to drive the outer sleeve 21 to move so that the collection groove 24 on the collection cylinder 22 is located at the water surface of the treatment liquid, and the driving mechanism 3 is used to drive the outer sleeve 21 and the collection cylinder 22 to rotate. The scum floating on the water surface can enter the interior of the collection cylinder 22 through the collection groove 24, so as to clean the scum floating on the water surface in time and avoid poor exhaust caused by too thick scum.

[0026] Furthermore, the scum collection mechanism 2 further includes rotating shafts 27 fixedly installed on both sides of the collection cylinder 22. The rotating shafts 27 are located inside the outer sleeve 21. Connecting plates 29 are rotatably connected to the ends of the rotating shafts 27. The upper ends of the connecting plates 29 are fixedly connected to the top of the outer sleeve 21. A torsion spring 28 is sleeved on the outer surface of the rotating shaft 27. One end of the torsion spring 28 is fixedly connected to the collection cylinder 22, and the other end of the torsion spring 28 is fixedly connected to the connecting plate 29. A plurality of fixing plates 5 are fixedly connected to the inner surface top of the collection chamber 102. The fixing plates 5 are arranged in one-to-one correspondence with the collection cylinder 22.

[0027] Furthermore, openings 25 are formed on the outer surface of the outer sleeve 21. The openings 25 are arranged in one-to-one correspondence with the collection cylinder 22. Flexible baffles 26 are fixedly connected inside the openings 25. Grooves adapted to the collection cylinder 22 are formed in the centers of the flexible baffles 26. The collection cylinder 22 is fixedly installed inside the grooves.

[0028] Furthermore, a plugging mechanism 6 is arranged inside the outer sleeve 21. The plugging mechanism 6 is used to plug one end of the collection cylinder 22 located inside the outer sleeve 21.

[0029] Further, the plugging mechanism 6 includes an electric cylinder 62 fixedly installed at the top inside the outer sleeve 21. The telescopic end of the electric cylinder 62 is fixedly connected with a plugging block 63. A groove 61 adapted to the plugging block 63 is formed at the top inside the outer sleeve 21.

[0030] The bottom of the outer sleeve 21 is fixedly connected with a sealing sleeve 12, and the sealing sleeve 12 is in sliding sealing fit with the sewage discharge pipe 103.

[0031] In this embodiment, when collecting the waste residue, the plugging block 63 abuts against one end of the collecting cylinder 22, so that one end of the collecting cylinder 22 located inside the outer sleeve 21 is in a closed state. When it is necessary to clean the waste residue in the collecting cylinder 22, first, the driving mechanism 3 is used to drive the first transmission wheel 32 to rotate, and the inductor 41 continuously emits infrared rays. When the second position sensor 43 detects the infrared signal emitted by the inductor 41, the rotation of the driving mechanism 3 is immediately stopped. At this time, the collecting cylinder 22 and the fixing plate 5 are in a staggered state. Then, the electric push rod 31 is used to drive the outer sleeve 21 and the collecting cylinder 22 to move upward above the fixing plate 5. At this time, the collecting cylinder 22 and the fixing plate 5 are in a misaligned state. Then, the driving mechanism is used to drive the first transmission wheel 32 to rotate, and the inductor 41 continuously emits infrared rays. When the first position sensor 42 detects the infrared signal, the rotation of the driving structure 3 is stopped. At this time, the collecting cylinder 22 is located directly above the fixing plate 5. Then, the electric cylinder 62 is used to drive the plugging block 63 to move upward into the groove 61, so that the plugging block 63 no longer plugs the collecting cylinder 22. Then, the electric push rod 31 is used to drive the outer sleeve 21 and the collecting cylinder 22 to move downward. The fixing plate 5 will form a moving interference on one end of the collecting cylinder 22, and the collecting cylinder 22 can rotate around the rotating shaft 27 to become inclined. At this time, the torsion spring 28 undergoes elastic deformation, and the waste residue inside the collecting cylinder 22 can slide into the sewage discharge pipe 103 and slide along the sewage discharge pipe 103 into the collecting cavity 102.

[0032] In this embodiment, after the waste residue inside the collecting cylinder 22 is processed, the driving mechanism 3 and the control mechanism 4 are used in cooperation to move the collecting cylinder 22 back to the liquid level of the treatment liquid, and the plugging mechanism 6 is used to seal the end of the collecting cylinder 22 again.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A painting waste gas treatment device, comprising a tank body (1), characterized in that, A treatment chamber (101) is provided at the upper part of the tank body (1), a collection chamber (102) is provided at the lower part of the tank body (1), a sewage discharge pipe (103) is provided on the inner bottom surface of the treatment chamber (101), the sewage discharge pipe (103) is used to connect the treatment chamber (101) and the collection chamber (102), a scum collection mechanism (2) is provided on the outer surface of the sewage discharge pipe (103), and the scum collection mechanism (2) can collect the scum on the water surface and put the scum into the collection chamber (102) through the sewage discharge pipe (103). The scum collection mechanism (2) includes an outer sleeve pipe (21) sleeved on the outer surface of the sewage discharge pipe (103), a driving mechanism (3) is provided at the top of the tank body (1), the driving mechanism (3) can drive the outer sleeve pipe (21) to move up and down or rotate, a plurality of collection cylinders (22) are provided at the top of the outer sleeve pipe (21), one end of the collection cylinder (22) is located inside the outer sleeve pipe (21), filter holes (23) evenly distributed are formed on the outer surface of the end of the collection cylinder (22) located outside the outer sleeve pipe (21), and a collection groove (24) is formed on the outer surface of the outer sleeve pipe (21) along the direction parallel to the water surface.

2. The coating waste gas treatment equipment according to claim 1, characterized in that: The scum collection mechanism (2) further includes rotating shafts (27) fixedly installed on both sides of the collection cylinder (22), the rotating shafts (27) are located inside the outer sleeve pipe (21), connecting plates (29) are rotatably connected to the ends of the rotating shafts (27), the upper ends of the connecting plates (29) are fixedly connected to the top of the outer sleeve pipe (21), torsion springs (28) are sleeved on the outer surfaces of the rotating shafts (27), one end of the torsion spring (28) is fixedly connected to the collection cylinder (22), the other end of the torsion spring (28) is fixedly connected to the connecting plate (29), and a plurality of fixing plates (5) are fixedly connected to the top inner surface of the collection chamber (102), and the fixing plates (5) are arranged in one-to-one correspondence with the collection cylinders (22).

3. An exhaust gas treatment device for coating according to claim 2, characterized in that: Openings (25) are formed on the outer surface of the outer sleeve pipe (21), the openings (25) are arranged in one-to-one correspondence with the collection cylinders (22), flexible baffles (26) are fixedly connected inside the openings (25), grooves adapted to the collection cylinders (22) are formed in the centers of the flexible baffles (26), and the collection cylinders (22) are fixedly installed inside the grooves.

4. The paint waste gas treatment equipment according to claim 3, characterized in that: A blocking mechanism (6) is arranged inside the outer sleeve pipe (21), and the blocking mechanism (6) is used to block one end of the collection cylinder (22) located inside the outer sleeve pipe (21).

5. The paint waste gas treatment equipment according to claim 4, characterized in that: The blocking mechanism (6) includes an electric cylinder (62) fixedly installed on the inner top of the outer sleeve pipe (21), a blocking block (63) is fixedly connected to the telescopic end of the electric cylinder (62), and a groove (61) adapted to the blocking block (63) is formed on the inner top of the outer sleeve pipe (21).

6. The paint exhaust gas treatment equipment according to claim 2, characterized in that: The driving mechanism (3) comprises a first transmission wheel (32) rotatably mounted on the top of the tank body (1); the upper surface of the tank body (1) is fixedly connected to a base (34); the upper surface of the base (34) is fixedly connected to a motor (35); the output shaft of the motor (35) is fixedly connected to a second transmission wheel (33); a conveyor belt (36) is sleeved on the outer surfaces of the first transmission wheel (32) and the second transmission wheel (33); an electric push rod (31) is fixedly connected to the middle of the first transmission wheel (32); and the telescopic end of the electric push rod (31) is fixedly connected to an outer sleeve (21).

7. An air pollution treatment equipment for painting waste gas as claimed in claim 6, characterized in that: It also includes a control mechanism (4), the control mechanism (4) including a sensor (41) fixedly mounted on the outer surface of the first transmission wheel (32), and the upper surface of the tank body (1) is fixedly connected with a first position sensor (42) and a second position sensor (43) in sequence along the rotation direction of the sensor (41).

8. An exhaust gas treatment device for painting according to claim 7, characterized in that: When the sensor (41) is aligned with the first position sensor (42), the collecting tube (22) is aligned with the fixing plate (5); when the sensor (41) is aligned with the second position sensor (43), the collecting tube (22) is offset from the fixing plate (5).

9. An exhaust gas treatment device for painting according to claim 1, characterized in that: An air inlet pipe (7), a discharge pipe (8), a drain pipe (9), a water inlet pipe (10) and an exhaust pipe (11) are fixedly connected and penetrated on the surface of the tank body (1); the air inlet pipe (7) and the drain pipe (9) are located at the bottom of the processing chamber (101) and are in communication with the processing chamber (101); the exhaust pipe (11) is located at the top of the processing chamber (101) and is in communication with the processing chamber (101); the water inlet pipe (10) is located in the middle of the processing chamber (101) and is in communication with the processing chamber (101); the discharge pipe (8) is located at the bottom of the collecting chamber (102) and is in communication with the collecting chamber (102); and valve bodies are arranged inside the air inlet pipe (7), the discharge pipe (8), the drain pipe (9), the water inlet pipe (10) and the exhaust pipe (11).

10. A painting waste gas treatment device according to claim 1, characterized in that: A sealing sleeve (12) is fixedly connected to the bottom of the outer sleeve (21), and the sealing sleeve (12) is slidably and sealingly matched with the sewage discharge pipe (103).