Circulating air duct structure of a spray booth exhaust system

Abstract

The present invention belongs to the technical field of waste gas treatment equipment, and discloses a circulating air duct structure of a spray booth exhaust system, which includes two spray booths. A double-layer paint blocking net is arranged on one side of the two spray booths facing each other. A paint blocking net filter box is arranged on the opposite side of the double-layer paint blocking net. A circulating air duct is fixedly installed at the bottom of the paint blocking net filter box. An axial flow fan is arranged inside the circulating air duct. A first silencer is arranged on the outer side of one end of the circulating air duct. Through the action of the axial flow fan and the centrifugal fan, part of the waste gas is discharged after being filtered by the first activated carbon box and the second activated carbon box, and part of it returns to the spray booth, effectively improving the waste gas treatment speed and quality. When used in multiple spray booths, a certain room can be individually closed, saving flow rate and increasing the treatment effect of other rooms. With a separate equipment room, the equipment is protected from being polluted by waste gas, and the service life of the equipment is prolonged. While taking into account more spray booths, the effect can also be ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste gas treatment equipment, and particularly relates to a circulating air duct structure of a spray booth exhaust system. Background Art

[0002] A spray booth is a spraying and grinding processing equipment, which is used to provide an operating environment isolated from the outside world. It can not only ensure the processing quality, but also avoid polluting the environment with paint mist and soot generated during processing. The spray booth can meet the requirements of painting operations for temperature, humidity, illuminance, air cleanliness, etc. It is an environmentally friendly painting equipment. In a traditional exhaust-type spray booth, the spraying operation is carried out in a relatively enclosed space, thus avoiding the pollution of air to the paint and reducing the spraying quality. At the same time, the harmful paint mist generated during spraying is treated by extraction and then discharged in an environmentally friendly manner.

[0003] During the spraying or spraying gel coat process, waste gas needs to be collected and treated. The treatment speed and quality of the waste gas have an important impact on the air quality in the spray booth, directly affecting the physical health of the operators and the environment. When only using a centrifugal fan outside, the waste gas is often not collected in time, and the residence time of the waste gas in the room is relatively long, resulting in low visibility and poor air environment in the spray booth. Summary of the Invention

[0004] In view of the problems in the prior art that waste gas needs to be collected and treated, the treatment speed and quality of the waste gas have an important impact on the air quality in the spray booth, directly affecting the physical health of the operators and the environment. When only using a centrifugal fan outside, the waste gas is often not collected in time, and the residence time of the waste gas in the room is relatively long, resulting in low visibility and poor air environment in the spray booth, the present invention proposes the following technical solution: A circulating air duct structure of a spray booth exhaust system, which includes two spray booths. A double-layer paint blocking net is arranged on the opposite side of the two spray booths. A paint blocking net filter box is arranged on the opposite side of the double-layer paint blocking net. A circulating air duct is fixedly installed at the bottom of the paint blocking net filter box. An axial flow fan is arranged inside the circulating air duct. A first muffler is arranged on the outer side of one end of the circulating air duct. The other end of the circulating air duct is communicated with the tops of the two spray booths. A connecting pipe is fixedly installed at the top of the circulating air duct. A first pneumatic valve is arranged at one end of the connecting pipe. A first conveying pipe is fixedly connected to the bottom of one end of the connecting pipe. A first activated carbon box is fixedly connected to the bottom of the first conveying pipe. Second pneumatic valves are arranged at both ends of the first conveying pipe. A second activated carbon box is arranged on one side of the first activated carbon box. A second conveying pipe is arranged on one side of the second activated carbon box. An exhaust pipe is fixedly connected to one side of the first activated carbon box. One end of the exhaust pipe is fixedly connected to a fixed box. A centrifugal fan is arranged inside the fixed box. An exhaust pipe is arranged at the top of the fixed box. A second muffler is arranged at the end of the exhaust pipe close to the fixed box. One end of the second conveying pipe is connected to the exhaust pipe. Air inlets are opened at the bottoms of the first activated carbon box and the second activated carbon box. Two activated carbon filter blocks are fixedly installed inside each of the first activated carbon box and the second activated carbon box.

[0005] Preferably, as the above technical solution, the circulating air duct is located between two spray booths. One end of the circulating air duct extends towards one side of the spray booth, and one end thereof is located at the top of the two spray booths. The first activated carbon box and the second activated carbon box are located on one side of the two spray booths. The middle part of the second conveying pipe is located on the top of the first activated carbon box and on one side of the first conveying pipe. One end of the discharge pipe extends upwards above the two spray booths on one side of the first conveying pipe, and the length of the discharge pipe is 15 meters.

[0006] Preferably, as the above technical solution, a nitrogen gas box is provided at the rear side of the first activated carbon box and the second activated carbon box. The nitrogen gas box is located on one side of the two spray booths. A nitrogen gas pipe is fixedly connected to the side of the nitrogen gas box far away from the two spray booths. A control valve is fixedly installed on the outer surface of the nitrogen gas pipe. One end of the nitrogen gas pipe is fixedly connected to the first activated carbon box and the second activated carbon box.

[0007] Preferably, as the above technical solution, the air inlet is arranged opposite to the first conveying pipe. An installation seat is arranged at the bottom of the air inlet. The installation seat is fixedly installed on the inner walls of the tops of the first activated carbon box and the second activated carbon box. A filter plate is arranged in the middle of the installation seat. A plurality of filter holes are formed in the filter plate. The filter plate is located at the bottom of the air inlet. Temperature sensors are arranged on the inner walls of one side of the first activated carbon box and the second activated carbon box.

[0008] Preferably, as the above technical solution, an installation groove is formed at the bottom of the installation seat and on one side of the filter plate. A first motor is fixedly installed inside the installation groove. The output end of the first motor is fixedly connected to a rotating rod. A connecting plate is fixedly connected to the bottom of the rotating rod. A rotating plate is fixedly connected to the side of the connecting plate. A plurality of air inlet holes are formed in the top of the rotating plate. The rotating plate has the same radius as the filter plate and the air inlet. The radius of the filter hole is larger than the radius of the air inlet.

[0009] Preferably, as the above technical solution, a fixing rod is fixedly installed on the inner wall of one side of the first activated carbon box and the second activated carbon box. A first magnetic block is fixedly connected to one side of the fixing rod. A second magnetic block is magnetically connected to one side of the first magnetic block. A fixing block is fixedly connected to one side of the second magnetic block. A first baffle is arranged on one side of the fixing block. A second baffle is arranged at the bottom of the first baffle. A support plate is arranged at the bottom of the fixing block. One side of the support plate is fixedly connected to the inner walls of one side of the first activated carbon box and the second activated carbon box. The bottom of the second baffle is in contact with the top of the support plate.

[0010] Preferably, as the above technical solution, the fixing rod and the support plate are located between the temperature sensors. An adjusting structure is arranged inside the fixing block. The first baffle and the second baffle are located on one side of the installation seat. The rotating plate is located between the first baffle and the second baffle. Activity openings are formed on the side of the first baffle and the second baffle close to the connecting plate. A moving opening is formed on the side of the fixing block far away from the second magnetic block. The first baffle and the second baffle are located at the upper and lower ends of the moving opening.

[0011] As a preference of the above technical solution, third magnetic blocks are fixedly connected to the inner wall of the top of the first baffle and the inner wall of the bottom of the second baffle, fourth magnetic blocks are fixedly connected to both the upper and lower sides of the rotating plate, the third magnetic blocks are magnetically connected to the fourth magnetic blocks, a limiting rod is fixedly connected to the bottom of the first baffle near one side of the movable opening, a limiting hole is formed in the top of the second baffle near one side of the movable opening, and the limiting rod is inserted into the limiting hole.

[0012] As a preference of the above technical solution, the adjusting structure includes a second motor, one side of the second motor is fixedly installed on the inner wall of the fixed block, the output end of the second motor is fixedly connected with a threaded rod, one end of the threaded rod is rotatably connected to the inner wall of the fixed block, the bottom end of the threaded rod is threadedly connected with a moving plate, both sides of the moving plate are slidably connected to the inner wall of the fixed block, push plates are hinged to the bottoms of both ends of the moving plate, and one end of each push plate passes through the moving opening and is hinged to the first baffle and the second baffle.

[0013] The beneficial effects of the present invention are as follows:

[0014] (1) Due to the action of the axial flow fan and the centrifugal fan in the present invention, part of the waste gas is discharged after being filtered by the first activated carbon box and the second activated carbon box, and part of it returns to the spray booth, effectively improving the waste gas treatment speed and quality. When used in multiple spray booths, a certain room can be closed separately, saving flow rate, increasing the treatment effect of other rooms, facilitating energy conservation, and having a separate equipment room to protect the equipment from being polluted by waste gas and improving the service life of the equipment. While taking into account more spray booths, the effect can also be ensured.

[0015] (2) In the present invention, the flow rate of the waste gas entering the first activated carbon box and the second activated carbon box is controlled, thereby preventing excessive wear of the activated carbon on the activated carbon filter block and affecting the filtration and purification of the waste gas. At the same time, through the rotation of the rotating plate, the first baffle and the second baffle, the nitrogen gas transported into the first activated carbon box and the second activated carbon box is quickly distributed evenly, facilitating cooling and preventing the temperature from being too high, affecting the adsorption capacity of the activated carbon and reducing the filtration effect. Description of the Drawings

[0016] Figure 1 Shows the overall structural schematic diagram of the embodiment;

[0017] Figure 2 Shows the cross-sectional view of the spray booth of the embodiment;

[0018] Figure 3 Shows the internal structural diagram of the fixed box of the embodiment;

[0019] Figure 4 Shows the structural diagram of the first activated carbon box and the nitrogen gas box of the embodiment;

[0020] Figure 5 Shows the internal structural diagram of the nitrogen gas box of the embodiment;

[0021] Figure 6 Shown is the front view of the embodiment mounting base and the rotating plate;

[0022] Figure 7 Shown is the bottom structure diagram of the embodiment mounting base;

[0023] Figure 8 Shown is the structure diagram of the first baffle and the second baffle of the embodiment;

[0024] Figure 9 Shown is the structure diagram of the embodiment adjusting structure.

[0025] In the figure: 1, spray booth; 2, double-layer paint blocking net; 3, paint blocking net filter box; 4, circulating air duct; 5, axial flow fan; 6, first silencer; 7, connecting pipe; 8, first pneumatic valve; 9, first conveying pipe; 10, first activated carbon box; 11, second pneumatic valve; 12, second activated carbon box; 13, second conveying pipe; 14, exhaust pipe; 15, fixed box; 16, centrifugal fan; 17, discharge pipe; 18, second silencer; 19, activated carbon filter block; 20, nitrogen gas box; 21, nitrogen gas pipe; 22, mounting base; 23, filter plate; 24, temperature sensor; 25, first motor; 26, rotating rod; 27, connecting plate; 28, rotating plate; 29, fixed rod; 30, first magnetic block; 31, second magnetic block; 32, fixed block; 33, first baffle; 34, second baffle; 35, support plate; 36, third magnetic block; 37, fourth magnetic block; 38, limiting rod; 39, second motor; 40, threaded rod; 41, moving plate; 42, pushing plate. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0027] The present invention provides a circulating air duct structure for a spray booth exhaust system, as Figures 1-4As shown in the figure, it includes two spray booths 1. On one side opposite to the two spray booths 1, there is a double-layer paint blocking net 2. On one side opposite to the double-layer paint blocking net 2, there is a paint blocking net filter box 3. At the bottom of the paint blocking net filter box 3, a circulating air duct 4 is fixedly installed. Inside the circulating air duct 4, there is an axial flow fan 5. On the outer side of one end of the circulating air duct 4, there is a first silencer 6. The other end of the circulating air duct 4 is connected to the tops of the two spray booths 1. At the top of the circulating air duct 4, a connecting pipe 7 is fixedly installed. At one end of the connecting pipe 7, there is a first pneumatic valve 8. At the bottom of one end of the connecting pipe 7, there is a first conveying pipe 9 fixedly connected. At the bottom of the first conveying pipe 9, there is a first activated carbon box 10 fixedly connected. There are second pneumatic valves 11 at both ends of the first conveying pipe 9. On one side of the first activated carbon box 10, there is a second activated carbon box 12. On one side of the second activated carbon box 12, there is a second conveying pipe 13. On one side of the first activated carbon box 10, there is an exhaust pipe 14 fixedly connected. At one end of the exhaust pipe 14, there is a fixed box 15 fixedly connected. Inside the fixed box 15, there is a centrifugal fan 16. At the top of the fixed box 15, there is an exhaust pipe 17. Near one end of the exhaust pipe 17 close to the fixed box 15, there is a second silencer 18. One end of the second conveying pipe 13 is connected to the exhaust pipe 14. At the bottoms of the first activated carbon box 10 and the second activated carbon box 12, there are air inlets. Inside the first activated carbon box 10 and the second activated carbon box 12, there are two activated carbon filter blocks 19 fixedly installed.

[0028] When painting and spraying gel coat operations are carried out inside the spray booth 1, waste gas will be generated. An axial flow fan 5 is installed in each spray booth 1 indoors, and a centrifugal fan 16 is installed outdoors. The axial flow fan 5 and the centrifugal fan 16 are started, so that the waste gas is preliminarily filtered through the double-layer paint blocking net 2 and then filtered again through the paint blocking net filter box 3, improving the air quality entering the spray booth 1 through the circulating air duct 4. The silencer is used to reduce the noise value in each spray booth 1. Taking advantage of the large air pressure of the centrifugal fan 16 and the large air volume of the axial flow fan 5, the unused rooms can be individually closed through the first start valve, saving flow and increasing the treatment effect of other rooms. When the first pneumatic valve 8 is started, part of the waste gas returns to the inside of the spray booth 1 through the circulating air duct 4, increasing the air circulation speed in the spray booth 1. Part of the waste gas is guided through the connecting pipe 7 to the first conveying pipe 9, the first activated carbon box 10, the second activated carbon box 12 to the centrifugal fan 16, which not only improves the air quality in the spray booth 1 but also effectively ensures the treatment quality of the waste gas. The waste gas is transported from the first conveying pipe 9 to the inside of the first activated carbon box 10 and the second activated carbon box 12, and is filtered and purified through the filter plate 23 and the two activated carbon filter blocks 19. The purified waste gas is transported through the second conveying pipe 13 and the exhaust pipe 14 to the inside of the exhaust pipe 17 for emission. Considering both the advantages and disadvantages of the axial flow fan 5 and the centrifugal fan 16, making full use of the advantages to improve the treatment effect, and being able to protect the equipment from being polluted by waste gas through a separate equipment room, increasing the service life of the equipment.

[0029] Such as Figure 1 、Figure 3 As shown, the circulating air duct 4 is located between two spray booths 1. One end of the circulating air duct 4 extends towards one side of the spray booth 1, and one end thereof is located at the top of the two spray booths 1. The first activated carbon box 10 and the second activated carbon box 12 are located on one side of the two spray booths 1. The middle part of the second conveying pipe 13 is located on the top of the first activated carbon box 10 and on one side of the first conveying pipe 9. One end of the discharge pipe 17 is located on one side of the first conveying pipe 9 and extends upwards above the two spray booths 1. The length of the discharge pipe 17 is 15 meters.

[0030] Through the circulating air duct 4, it is convenient to return part of the waste gas to the inside of the spray booth 1. Part of it is filtered by the first activated carbon box 10 and the second activated carbon box 12. The waste gas in the second activated carbon box 12 is conveyed to the inside of the exhaust pipe 14 through the conveying pipe. The waste gas in the first activated carbon box 10 passes through the inside of the exhaust pipe 14. Under the action of the centrifugal fan 16, the waste gas inside the exhaust pipe 14 is discharged through the 15-meter discharge pipe 17, and at the same time, the individual spray booth 1 can be controlled, increasing the treatment speed of other spray booths 1.

[0031] As Figure 1 、 Figure 3 、 Figure 4 shown, a nitrogen gas box 20 is provided at the rear sides of the first activated carbon box 10 and the second activated carbon box 12. The nitrogen gas box 20 is located on one side of the two spray booths 1. A nitrogen gas pipe 21 is fixedly connected to the side of the nitrogen gas box 20 away from the two spray booths 1. A control valve is fixedly installed on the outer surface of the nitrogen gas pipe 21. One end of the nitrogen gas pipe 21 is fixedly connected to the first activated carbon box 10 and the second activated carbon box 12.

[0032] When the temperature inside the first activated carbon box 10 and the second activated carbon box 12 is too high, by controlling the control valve, the nitrogen gas box 20 conveys nitrogen gas to the inside of the first activated carbon box 10 and the second activated carbon box 12 through the nitrogen gas pipe 21, so that the nitrogen gas can cool the first activated carbon box 10 and the second activated carbon box 12, thus preventing the adsorption effect of the activated carbon on the activated carbon filter block 19 from being affected by too high temperature and reducing the activated carbon filtering effect.

[0033] As Figures 4-5 shown, the air inlet is arranged opposite to the first conveying pipe 9. An installation seat 22 is provided at the bottom of the air inlet. The installation seat 22 is fixedly installed on the top inner walls of the first activated carbon box 10 and the second activated carbon box 12. A filter plate 23 is provided in the middle of the installation seat 22. A plurality of filter holes are formed in the filter plate 23. The filter plate 23 is located at the bottom of the air inlet. Temperature sensors 24 are provided on the inner walls of one side of the first activated carbon box 10 and the second activated carbon box 12.

[0034] The waste gas inside the first delivery pipe 9 is conveniently transported into the first activated carbon box 10 and the second activated carbon box 12 through the air inlet. The waste gas is filtered by the filter plate 23 to reduce impurities in the waste gas. The temperature sensors 24 detect the temperatures inside the first activated carbon box 10 and the second activated carbon box 12, facilitating the control of the temperatures inside the first activated carbon box 10 and the second activated carbon box 12 and improving the use effect of the activated carbon.

[0035] As Figures 5-7 shown, an installation groove is provided at the bottom of the mounting seat 22 and on one side of the filter plate 23. A first motor 25 is fixedly installed inside the installation groove. The output end of the first motor 25 is fixedly connected to a rotating rod 26. The bottom of the rotating rod 26 is fixedly connected to a connecting plate 27. A rotating plate 28 is fixedly connected to the side of the connecting plate 27. A plurality of air inlet holes are provided at the top of the rotating plate 28. The rotating plate 28 has the same radius as the filter plate 23 and the air inlet. The radius of the filter holes is greater than the radius of the air inlet.

[0036] The installation groove facilitates the installation of the first motor 25. When the first motor 25 drives the rotating rod 26 and the connecting plate 27 to rotate, the connecting plate 27 drives the rotating plate 28 to rotate, causing the connecting plate 27 to continuously and quickly fit and separate from the filter plate 23, and the air inlet holes and the filter holes to quickly separate and fit. Since the rotating plate 28 has the same radius as the filter plate 23 and the air inlet, and the radius of the filter holes is greater than the radius of the air inlet, it is convenient to control the flow rate of the waste gas entering the first activated carbon box 10 and the second activated carbon box 12, preventing the activated carbon filter block 19 from being over-damaged due to too fast a flow rate.

[0037] As Figures 6-8 shown, a fixing rod 29 is fixedly installed on the inner wall of one side of the first activated carbon box 10 and the second activated carbon box 12. A first magnetic block 30 is fixedly connected to one side of the fixing rod 29. A second magnetic block 31 is magnetically connected to one side of the first magnetic block 30. A fixing block 32 is fixedly connected to one side of the second magnetic block 31. A first baffle 33 is provided on one side of the fixing block 32. A second baffle 34 is provided at the bottom of the first baffle 33. A support plate 35 is provided at the bottom of the fixing block 32. One side of the support plate 35 is fixedly connected to the inner wall of one side of the first activated carbon box 10 and the second activated carbon box 12. The bottom of the second baffle 34 is in contact with the top of the support plate 35. Third magnetic blocks 36 are fixedly connected to the inner wall of the top of the first baffle 33 and the bottom inner wall of the second baffle 34. Fourth magnetic blocks 37 are fixedly connected to both the upper and lower sides of the rotating plate 28. The third magnetic blocks 36 and the fourth magnetic blocks 37 are magnetically connected. A limiting rod 38 is fixedly connected to the bottom of the first baffle 33 near the movable opening. A limiting hole is provided at the top of the second baffle 34 near the movable opening. The limiting rod 38 is inserted into the limiting hole.

[0038] The first magnetic block 30 is installed through the fixing block 32, and is magnetically connected to the second magnetic block 31, so that the fixing block 32 fixes the first baffle 33 and the second baffle 34 on the upper and lower sides of the rotating plate 28. The support plate 35 facilitates the support of the second baffle 34, and is convenient for improving the stability of the first baffle 33 and the second baffle 34 when not in use. When the first magnetic block 30 is separated from the second magnetic block 31, the second baffle 34 no longer fits against the top of the support plate 35, so that it is convenient for the first baffle 33 and the second baffle 34 to fit against the upper and lower sides of the rotating rod 26, so that the third magnetic block 36 is magnetically connected to the fourth magnetic block 37, so that the limiting rod 38 is inserted into the limiting hole, so that the first baffle 33 and the second baffle 34 are fixed on the rotating plate 28, blocking the air inlet hole, and preventing the rotating plate 28 from deforming due to the air inlet hole when the rotating plate 28 rotates, thus being inconvenient to use.

[0039] As Figures 7-8 shown, the fixing rod 29 and the support plate 35 are located between the temperature sensors 24. An adjusting structure is provided inside the fixing block 32. The first baffle 33 and the second baffle 34 are located on one side of the mounting seat 22. The rotating plate 28 is located between the first baffle 33 and the second baffle 34. Activity ports are provided on the side of the first baffle 33 and the second baffle 34 close to the connecting plate 27. A moving port is provided on the side of the fixing block 32 away from the second magnetic block 31. The first baffle 33 and the second baffle 34 are located at the upper and lower ends of the moving port.

[0040] The adjusting structure facilitates adjusting the distance between the first baffle 33 and the second baffle 34, so that the first baffle 33 and the second baffle 34 move closer to each other along the activity ports, so that the third magnetic block 36 and the fourth magnetic block 37 are magnetically attracted to fix the first baffle 33 on the top of the rotating plate 28 and the second baffle 34 on the bottom of the rotating plate 28, which is convenient for blocking the upper and lower sides of the rotating plate 28 and facilitating rotation, so as to quickly distribute the nitrogen gas inside the first activated carbon box 10 and the second activated carbon box 12 evenly.

[0041] As Figures 8-9 shown, the adjusting structure includes a second motor 39. One side of the second motor 39 is fixedly installed on the inner wall of the fixing block 32. The output end of the second motor 39 is fixedly connected with a threaded rod 40. One end of the threaded rod 40 is rotatably connected to the inner wall of the fixing block 32. The bottom end of the threaded rod 40 is threadedly connected with a moving plate 41. Both sides of the moving plate 41 are slidably connected to the inner wall of the fixing block 32. Push plates 42 are hinged to the bottoms of both ends of the moving plate 41. One end of the push plate 42 passes through the moving port and is hinged to the first baffle 33 and the second baffle 34.

[0042] By starting the second motor 39 to drive the threaded rod 40 to rotate, the moving plate 41 moves along the inner wall of the fixed block 32 on the threaded rod 40 towards the second motor 39, causing the pushing plate 42 to rotate, driving the first baffle 33 and the second baffle 34 to move closer to each other, thereby facilitating the shielding and protection of the rotating plate 28 and improving the service life of the rotating plate 28.

[0043] Working principle: During use, start the axial flow fan 5 and the centrifugal fan 16, so that the waste gas is initially filtered by the double-layer paint blocking net 2, and then filtered and purified again by the paint blocking net filter box 3. Start the first pneumatic valve 8. Taking advantage of the large air pressure of the centrifugal fan 16 and the large air volume of the axial flow fan 5, the axial flow fan 5 makes a part of the air return to the spray booth 1 through the circulating air duct 4, and another part of the air is connected to the connecting pipe 7 outdoors. At the same time, start the first silencer 6 to reduce the noise value. The waste gas inside the connecting pipe 7 is transported to the inside of the first activated carbon box 10 and the second activated carbon box 12 through the first delivery pipe 9, and is filtered by the filter plate 23. At the same time, start the first motor 25 to drive the rotating rod 26 and the connecting plate 27 to rotate, so that the rotating plate 28 rotates at the bottom of the filter plate 23, making the rotating plate 28 fit and separate from the filter plate 23, controlling the flow rate of the waste gas entering the first activated carbon box 10 and the second activated carbon box 12. After the waste gas passes through the filter plate 23, it is filtered and purified again by the activated carbon filter block 19. The waste gas inside the second activated carbon box 12 is transported to the exhaust pipe 14 through the second delivery pipe 13 after purification. The waste gas inside the first activated carbon box 10 is transported to the inside of the exhaust pipe 14 after purification. The waste gas inside the exhaust pipe 14 is discharged through the discharge pipe 17 under the action of the centrifugal fan 16.

[0044] When the temperature sensor 24 detects that the temperature inside the first activated carbon box 10 and the second activated carbon box 12 is too high, start the second motor 39 to drive the threaded rod 40 to rotate, so that the moving plate 41 moves along the inner wall of the fixed block 32 on the threaded rod 40 towards the second motor 39, causing the pushing plate 42 to rotate, driving the first baffle 33 and the second baffle 34 to move closer to each other, so that the bottom of the second baffle 34 no longer fits the top of the support plate 35, and making the third magnet 36 and the fourth magnet 37 magnetically attract each other, and the limiting rod 38 is inserted into the limiting hole, so that the first baffle 33 and the second baffle 34 fit the upper and lower sides of the rotating plate 28, covering the air inlet holes and fixing them on the rotating plate 28. Then start the first motor 25 to drive the rotating rod 26 and the connecting plate 27 to rotate, so that the first magnet 30 and the second magnet 31 are separated. The rotating plate 28 rotates to drive the first baffle 33 and the second baffle 34 to rotate. Then control the control valve so that the nitrogen gas in the nitrogen gas tank 20 is transported to the inside of the first activated carbon box 10 and the second activated carbon box 12 through the nitrogen gas pipe 21, quickly distributing the nitrogen gas evenly, cooling the inside of the first activated carbon box 10 and the second activated carbon box 12, thereby facilitating the improvement of the use effect of the activated carbon.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. A circulating air duct structure of a spray booth exhaust system, comprising two spray booths (1), characterized in that: A double-layer paint-blocking net (2) is arranged on one side opposite to the two spray booths (1); a paint-blocking net filter box (3) is arranged on one side opposite to the double-layer paint-blocking net (2); a circulating air duct (4) is fixedly installed on the top of the paint-blocking net filter box (3); an axial flow fan (5) is arranged inside the circulating air duct (4); a first muffler (6) is arranged on the outside of one end of the circulating air duct (4); the other end of the circulating air duct (4) is connected to the tops of the two spray booths (1); a connecting pipe (7) is fixedly installed on the top of the circulating air duct (4); a first pneumatic valve (8) is arranged at one end of the connecting pipe (7); a first delivery pipe (9) is fixedly connected to the bottom of one end of the connecting pipe (7); a first activated carbon box (10) is fixedly connected to the bottom of the first delivery pipe (9); and second pneumatic valves (11) are arranged at both ends of the first delivery pipe (9). A second activated carbon box (12) is arranged on one side of the first activated carbon box (10), a second delivery pipe (13) is arranged on one side of the second activated carbon box (12), an exhaust pipe (14) is fixedly connected to one side of the first activated carbon box (10), one end of the exhaust pipe (14) is fixedly connected to a fixed box (15), a centrifugal fan (16) is arranged inside the fixed box (15), a discharge pipe (17) is arranged on the top of the fixed box (15), a second muffler (18) is arranged on one end of the discharge pipe (17) close to the fixed box (15), one end of the second delivery pipe (13) is connected to the exhaust pipe (14), air inlets are opened on the tops of the first activated carbon box (10) and the second activated carbon box (12), and two activated carbon filter blocks (19) are fixedly installed inside the first activated carbon box (10) and the second activated carbon box (12); A fixing rod (29) is fixedly mounted on the inner wall of one side of the first activated carbon box (10) and the second activated carbon box (12); a first magnetic block (30) is fixedly connected to one side of the fixing rod (29); a second magnetic block (31) is magnetically connected to one side of the first magnetic block (30); a fixing block (32) is fixedly connected to one side of the second magnetic block (31); a first baffle (33) is provided on one side of the fixing block (32); a second baffle (34) is provided at the bottom of the first baffle (33); a support plate (35) is provided at the bottom of the fixing block (32); one side of the support plate (35) is fixedly connected to the inner wall of one side of the first activated carbon box (10) and the second activated carbon box (12); and the bottom of the second baffle (34) is in contact with the top of the support plate (35); An adjustment structure is provided inside the fixed block (32), the adjustment structure comprising a second motor (39), one side of the second motor (39) being fixedly mounted on the inner wall of the fixed block (32), an output end of the second motor (39) being fixedly connected to a threaded rod (40), one end of the threaded rod (40) being rotatably connected to the inner wall of the fixed block (32), a bottom end of the threaded rod (40) being threadedly connected to a moving plate (41), both sides of the moving plate (41) being slidably connected to the inner wall of the fixed block (32), a push plate (42) being hingedly connected at both ends of the bottom of the moving plate (41), one end of the push plate (42) passing through the moving opening and being hingedly connected to the first baffle plate (33) and the second baffle plate (34).

2. The circulating air duct structure of the spray booth exhaust system according to claim 1, characterized in that: The circulating air duct (4) is located between the two spray booths (1), one end of the circulating air duct (4) extends toward one side of the spray booth (1), and one end thereof is located at the top of the two spray booths (1), the first activated carbon box (10) and the second activated carbon box (12) are located at one side of the two spray booths (1), the middle of the second delivery pipe (13) is located at the top of the first activated carbon box (10), and is located at one side of the first delivery pipe (9), one end of the discharge pipe (17) is located at one side of the first delivery pipe (9) and extends toward the top of the two spray booths (1), and the length of the discharge pipe (17) is 15 meters.

3. The circulating air duct structure of the spray booth exhaust system according to claim 1, characterized in that: A nitrogen box (20) is arranged at the rear side of the first activated carbon box (10) and the second activated carbon box (12); the nitrogen box (20) is located on one side of the two spray booths (1); a nitrogen pipe (21) is fixedly connected to the side of the nitrogen box (20) away from the two spray booths (1); a control valve is fixedly installed on the outer surface of the nitrogen pipe (21); one end of the nitrogen pipe (21) is fixedly connected to the first activated carbon box (10) and the second activated carbon box (12).

4. The circulating air duct structure of the spray booth exhaust system according to claim 1, characterized in that: The air inlet is arranged opposite to the first delivery pipe (9), a mounting seat (22) is arranged at the bottom of the air inlet, the mounting seat (22) is fixedly mounted on the top inner walls of the first activated carbon box (10) and the second activated carbon box (12), a filter plate (23) is arranged in the middle of the mounting seat (22), a plurality of filter holes are opened on the filter plate (23), the filter plate (23) is located at the bottom of the air inlet, and a temperature sensor (24) is arranged on the inner wall of one side of the first activated carbon box (10) and the second activated carbon box (12).

5. The circulating air duct structure of the spray booth exhaust system according to claim 4, characterized in that: A mounting groove is provided at the bottom of the mounting seat (22) and located on one side of the filter plate (23); a first motor (25) is fixedly mounted inside the mounting groove; a rotating rod (26) is fixedly connected to the output end of the first motor (25); a connecting plate (27) is fixedly connected to the bottom of the rotating rod (26); a rotating plate (28) is fixedly connected to the side of the connecting plate (27); a plurality of air inlet holes are provided at the top of the rotating plate (28); the rotating plate (28) has the same radius as the filter plate (23) and the air inlet; and the radius of the filter hole is larger than the radius of the air inlet.

6. The circulating air duct structure of the spray booth exhaust system according to claim 5, characterized in that: The fixing rod (29) and the supporting plate (35) are located between the temperature sensor (24); the first baffle plate (33) and the second baffle plate (34) are located on one side of the mounting seat (22); the rotating plate (28) is located between the first baffle plate (33) and the second baffle plate (34); a movable opening is provided on a side of the first baffle plate (33) and the second baffle plate (34) close to the connecting plate (27); a movable opening is provided on a side of the fixing block (32) away from the second magnetic block (31); and the first baffle plate (33) and the second baffle plate (34) are located at upper and lower ends of the movable opening.

7. The circulating air duct structure of the spray booth exhaust system according to claim 6, characterized in that: The top inner wall of the first baffle (33) and the bottom inner wall of the second baffle (34) are both fixedly connected with a third magnetic block (36); the upper and lower sides of the rotating plate (28) are both fixedly connected with a fourth magnetic block (37); the third magnetic block (36) and the fourth magnetic block (37) are magnetically connected; the bottom of the first baffle (33) close to the movable opening is fixedly connected with a limiting rod (38); the top of the second baffle (34) close to the movable opening is provided with a limiting hole; the limiting rod (38) is plugged into the limiting hole.

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