Coating low-concentration waste gas treatment equipment and process

Abstract

The invention discloses coating low-concentration waste gas treatment equipment and process, and belongs to the technical field of waste gas treatment. The coating low-concentration waste gas treatment equipment comprises a base, four supporting columns are symmetrically fixed to the top of the base, a shell is fixed to the tops of the four supporting columns, a filter screen plate is slidably mounted in the shell, and an H-shaped connecting plate is arranged above the filter screen plate. By arranging the filter screen plate, dust in waste gas can be filtered, and by arranging an H-shaped connecting plate, a first spring, a rapping plate and a driving assembly, when the filter screen plate is blocked and the ventilation effect is influenced, the filter screen plate can be rapped, so that meshes of the filter screen plate can be conveniently dredged, and the ventilation effect is improved. According to the waste gas treatment device, the waste gas treatment device does not need to be detached from the shell to be cleaned, some harmful substances in waste gas can be purified by arranging the activated carbon filter plate, dust accumulated in the shell can be conveniently discharged by arranging the dust discharging assembly, and the overall using effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and specifically relates to a coating low-concentration waste gas treatment device and process. Background Art

[0002] During the coating production and processing process, some waste gases will be generated, and the waste gases contain some harmful substances. Therefore, waste gas treatment equipment is usually required. The current waste gas treatment equipment does not have a very good use effect. According to a coating production line waste gas treatment device described in the existing authorized publication number CN217041809U, although this patent proposes to add an air inlet filtering device to prevent large-particle dust in the waste gas from entering the interior of the waste gas treatment equipment, this patent only designs a structural design for facilitating the disassembly and assembly of the dust filter screen. However, during use, the dust filter screen becomes blocked. If it can only be disassembled for cleaning, the operation is rather troublesome and not efficient enough. Moreover, it is not convenient to discharge the accumulated dust in this patent. Therefore, we propose a coating low-concentration waste gas treatment device and process to solve the above problems. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a coating low-concentration waste gas treatment device and process, which solves the problems raised in the above background art.

[0004] The present invention specifically adopts the following technical solutions to achieve the above objectives: A coating low-concentration waste gas treatment device includes a base. Four support columns are symmetrically fixed on the top of the base. A housing is fixed on the top of the four support columns. A filter screen plate is slidably installed inside the housing. Above the filter screen plate, there is an H-shaped connecting plate, and the H-shaped connecting plate is slidably connected inside the housing. Four corners at the bottom of the H-shaped connecting plate are each fixed with a first spring. Below the H-shaped connecting plate, two vibrating plates for vibrating the filter screen plate are symmetrically arranged. The bottom end of the first spring is fixedly connected to the top of the corresponding vibrating plate. A driving component for driving the H-shaped connecting plate to reciprocate up and down is arranged on the base. An activated carbon filter plate is slidably installed inside the housing, and the activated carbon filter plate is arranged above the H-shaped connecting plate. The top of the housing is installed with a top cover by screws. A suction fan is fixed on the top of the top cover. The suction end of the suction fan is fixed with a suction pipe. One end of the suction pipe is fixedly connected and communicated with a connecting pipe. An air suction hood is installed at the end of the connecting pipe. The air outlet end of the suction fan is fixed with an air outlet pipe. The bottom end of the air outlet pipe is communicated with the housing and is located below the filter screen plate. A dust discharge pipe is fixedly communicated with the surface of the housing and is located above the activated carbon filter plate. A dust discharge component is arranged at the bottom end of the housing.

[0005] Further, two T-shaped sliders are symmetrically fixed on both side walls of the H-shaped connecting plate, and two T-shaped chutes adapted to the T-shaped sliders are symmetrically formed on both inner walls of the housing.

[0006] Further, telescopic sleeves are arranged inside the first springs. Two ends of each telescopic sleeve are respectively fixedly connected to the bottom of the H-shaped connecting plate and the top of the vibration plate. Rubber pads are fixedly connected to the bottoms of the vibration plates.

[0007] Further, the driving assembly includes two support plates symmetrically fixed on the top of the base. Two T-shaped guide rods are symmetrically fixed on the side walls of the two support plates. Two sliding plates are symmetrically arranged on the top of the base. The sliding plates are slidably sleeved on the surfaces of the corresponding two T-shaped guide rods. Second springs are sleeved on the surfaces of the T-shaped guide rods. Two ends of each second spring are respectively fixedly connected to the side wall of the adjacent support plate and the side wall of the adjacent sliding plate. U-shaped rods are fixedly connected to one side wall of the two sliding plates. The top ends of the two U-shaped rods respectively slide through the adjacent side walls of the housing and are rotatably connected to a connecting rod through a pin shaft. The bottom ends of the two connecting rods are rotatably connected to the top of the H-shaped connecting plate through a pin shaft. A stepping motor is fixed on the top of the base. A cam is fixed on the output shaft of the stepping motor. The two sliding plates are in close contact with the cam.

[0008] Further, the dust removal assembly includes a screw conveyor arranged at the bottom end inside the housing. One end of the screw conveyor is rotatably connected to the housing through a bearing. A servo motor is fixed on the surface of the housing. The output shaft of the servo motor is fixedly connected to one end of the screw conveyor. A dust discharge port is formed in the side wall of the housing far away from the servo motor, and a dust discharge pipe is fixed at the dust discharge port. One end of the screw conveyor extends into the dust discharge pipe. A blocking plate is slidably installed at the end of the dust discharge pipe. An electric push rod is fixed on the top of the base. A connecting piece is fixed on the ejecting end of the electric push rod. The top end of the connecting piece is fixedly connected to the blocking plate.

[0009] Further, a support block is fixed on the top of the base. A T-shaped limiting rod is fixed on the surface of the support block. The connecting piece is slidably sleeved on the surface of the T-shaped limiting rod.

[0010] Further, universal self-locking wheels are installed at the four corners of the bottom of the base. L-shaped stabilizing plates are fixed on both side walls of the housing. Two ends of the connecting pipe are respectively fixedly connected to the corresponding L-shaped stabilizing plates.

[0011] Furthermore, mounting plates are fixed to the ends of the filter mesh plate and the activated carbon filter plate, and U-shaped handles are fixed to the surfaces of the mounting plates. The mounting plates are connected to the surface of the housing by screws. Sockets adapted to the filter mesh plate and the activated carbon filter plate are respectively formed on the surface of the housing, and mounting grooves adapted to the filter mesh plate and the activated carbon filter plate are respectively formed on the inner walls of both sides of the housing.

[0012] A treatment process for a coating low-concentration waste gas treatment device includes the following steps: S1: Place the device in a suitable position and start the suction fan. The suction fan generates suction force. Through the suction hood, connecting pipe, suction duct, and outlet duct, the waste gas generated during coating can be sucked into the housing. Under the action of the filter mesh plate, dust or other particulate matters in the waste gas can be filtered out. After the waste gas passes through the filter mesh plate, it will pass through the activated carbon filter plate. Under the action of the activated carbon filter plate, harmful substances in the waste gas can be adsorbed, and then the clean gas will be discharged from the exhaust duct. S2: When the mesh holes of the filter mesh plate are blocked, affecting the ventilation effect, start the stepping motor. The stepping motor can drive the cam to rotate. With the elastic force of the second spring, when the cam rotates, the two sliding plates can move left and right reciprocally in the horizontal direction. The sliding plates can drive the corresponding U-shaped rods to move left and right reciprocally. The U-shaped rods can drive the corresponding connecting rods to move. The two connecting rods can drive the H-shaped connecting plate to move up and down reciprocally. The H-shaped connecting plate can drive the vibrating plate to move up and down reciprocally through the first spring, thereby vibrating the filter mesh plate and thus dredging the mesh holes of the filter mesh plate. S3: When there is a large accumulation of dust in the housing, start the electric push rod. The protruding end of the electric push rod extends to drive the connecting piece to move, and the connecting piece can drive the blocking plate to move, thereby opening the dust discharge pipe. Then start the servo motor. The servo motor can drive the auger to rotate, and the auger can push the dust accumulated in the housing out from the port of the dust discharge pipe.

[0013] Compared with the prior art, the present invention provides a coating low-concentration waste gas treatment device and process, having the following beneficial effects: By providing a filter mesh plate in the present invention, dust in the waste gas can be filtered. And by providing an H-shaped connecting plate, a first spring, a vibrating plate, and a driving component, when the filter mesh plate is blocked and affects the ventilation effect, the filter mesh plate can be vibrated, thereby facilitating the dredging of the mesh holes of the filter mesh plate without the need to disassemble it from the housing for cleaning, so it is more convenient. By providing an activated carbon filter plate, some harmful substances in the waste gas can be purified. By providing a dust discharge component, the dust accumulated in the housing can be discharged more conveniently, so the overall use effect is better. Description of the Drawings

[0014] Figure 1Schematic diagram of the overall front three-dimensional structure of the present invention; Figure 2 Schematic diagram of the overall back three-dimensional structure of the present invention; Figure 3 Schematic diagram of the overall top view structure of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the sectional structure along A-A in the present invention; Figure 5 For the present invention Figure 3 Schematic diagram of the sectional structure along B-B in the present invention; Figure 6 Schematic diagram of the H-shaped plate structure of the present invention.

[0015] In the figure: 1. Base; 2. Support column; 3. Shell; 4. Filter screen plate; 5. H-shaped connecting plate; 6. First spring; 7. Vibration plate; 8. Driving component; 801. Bracket plate; 802. T-shaped guide rod; 803. Slide plate; 804. Second spring; 805. U-shaped rod; 806. Connecting rod; 807. Stepper motor; 808. Cam; 9. Activated carbon filter plate; 10. Top cover; 11. Exhaust fan; 12. Exhaust air pipe; 13. Connecting pipe; 14. Air suction hood; 15. Air outlet pipe; 16. Exhaust pipe; 17. Dust exhaust component; 1701. Screw conveyor; 1702. Servo motor; 1703. Dust exhaust pipe; 1704. Plugging plate; 1705. Electric push rod; 1706. Connecting piece; 1707. Bracket block; 1708. T-shaped limiting rod; 18. Telescopic sleeve; 19. L-shaped stabilizing plate. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0017] As Figures 1-6As shown in the figure, an exhaust gas treatment device for coating with low concentration proposed by an embodiment of the present invention includes a base 1. Four support columns 2 are symmetrically fixed on the top of the base 1. A housing 3 is fixed on the top of the four support columns 2. A filter screen plate 4 is slidably installed inside the housing 3. Above the filter screen plate 4, there is an H-shaped connecting plate 5. The H-shaped connecting plate 5 is slidably connected inside the housing 3. Two T-shaped sliders are symmetrically fixed on both side walls of the H-shaped connecting plate 5. Two T-shaped chutes adapted to the T-shaped sliders are symmetrically opened on both inner walls of the housing 3, so that the H-shaped connecting plate 5 can move stably inside the housing 3. Four corners of the bottom of the H-shaped connecting plate 5 are fixed with first springs 6. Two vibrating plates 7 for vibrating the filter screen plate 4 are symmetrically arranged below the H-shaped connecting plate 5. The bottom ends of the first springs 6 are fixedly connected to the tops of the corresponding vibrating plates 7. Telescopic sleeves 18 are arranged inside the first springs 6. Two ends of the telescopic sleeves 18 are respectively fixedly connected to the bottom of the H-shaped connecting plate 5 and the top of the vibrating plate 7, so that the vibrating plate 7 can move more stably in the vertical direction. Rubber pads are fixed on the bottoms of the vibrating plates 7 to play a protective role and prevent damage to the filter screen plate 4. A driving component 8 for driving the H-shaped connecting plate 5 to reciprocate up and down is arranged on the base 1. An activated carbon filter plate 9 is slidably installed inside the housing 3. The activated carbon filter plate 9 is arranged above the H-shaped connecting plate 5. The top of the housing 3 is installed with a top cover 10 by screws. A suction fan 11 is fixed on the top of the top cover 10. The suction end of the suction fan 11 is fixed with a suction pipe 12. One end of the suction pipe 12 is fixedly connected and communicated with a connecting pipe 13. An air suction hood 14 is installed at the end of the connecting pipe 13. The air outlet end of the suction fan 11 is fixed with an air outlet pipe 15. The bottom end of the air outlet pipe 15 is communicated with the housing 3 and is located below the filter screen plate 4. An exhaust pipe 16 is fixedly communicated with the surface of the housing 3 and is located above the activated carbon filter plate 9. A dust discharging component 17 is arranged at the bottom end of the housing 3.

[0018] During use, place the device in a suitable position and start the suction fan 11. The suction fan 11 generates suction force. Through the suction hood 14, connecting pipe 13, suction pipe 12, and air outlet pipe 15, the waste gas generated during coating can be sucked into the housing 3. Under the action of the filter screen plate 4, some dust or other particulate matters in the waste gas can be filtered out. After the waste gas passes through the filter screen plate 4, it will pass through the activated carbon filter plate 9. Under the action of the activated carbon filter plate 9, some harmful substances in the waste gas can be adsorbed, and then the relatively clean gas will be discharged from the exhaust pipe 16. When the mesh holes of the filter screen plate 4 are blocked, affecting the ventilation effect, the driving assembly 8 can be used to drive the H-shaped connecting plate 5 to reciprocate up and down in the housing 3. The H-shaped connecting plate 5 can drive the vibration plate 7 to reciprocate up and down through the first spring 6, so as to vibrate the filter screen plate 4, thus dredging the mesh holes of the filter screen plate 4. It is not necessary to disassemble it from the housing 3 for cleaning, so it is more convenient. When the dust accumulates more in the housing 3, the dust removal assembly 17 can be used to discharge the accumulated dust from the housing 3.

[0019] As Figure 1 , Figure 2 , Figure 4 and Figure 6 shown, in some embodiments, the driving assembly 8 includes two support plates 801 symmetrically fixed on the top of the base 1. Two T-shaped guide rods 802 are symmetrically fixed on the side walls of the two support plates 801. Two sliding plates 803 are symmetrically arranged on the top of the base 1. The sliding plates 803 are slidably sleeved on the surfaces of the corresponding two T-shaped guide rods 802. The surfaces of the T-shaped guide rods 802 are sleeved with second springs 804. The two ends of the second springs 804 are respectively fixedly connected to the side walls of the adjacent support plates 801 and the side walls of the adjacent sliding plates 803. One side wall of each of the two sliding plates 803 is fixedly connected with a U-shaped rod 805. The tops of the two U-shaped rods 805 respectively slide through the adjacent side walls of the housing 3 and are rotatably connected with a connecting rod 806 through a pin shaft. The bottoms of the two connecting rods 806 are respectively rotatably connected to the top of the H-shaped connecting plate 5 through a pin shaft. A stepping motor 807 is fixed on the top of the base 1. The output shaft of the stepping motor 807 is fixedly connected with a cam 808. The two sliding plates 803 are in close contact with the cam 808. When it is necessary to drive the H-shaped connecting plate 5 to reciprocate up and down in the vertical direction, the stepping motor 807 can be started. The stepping motor 807 can drive the cam 808 to rotate. It should be noted here that the second spring 804 in the accompanying drawings of the specification is in a compressed state. With the elastic force of the second spring 804, when the cam 808 rotates, the two sliding plates 803 can reciprocate left and right in the horizontal direction. The sliding plates 803 can drive the corresponding U-shaped rods 805 to reciprocate left and right. The U-shaped rods 805 can drive the corresponding connecting rods 806 to move. The two connecting rods 806 can drive the H-shaped connecting plate 5 to reciprocate up and down.

[0020] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, in some embodiments, the dust exhaust assembly 17 includes a screw conveyor 1701 disposed at the inner bottom end of the housing 3. One end of the screw conveyor 1701 is rotatably connected to the housing 3 through a bearing. A servo motor 1702 is fixed on the surface of the housing 3, and the output shaft of the servo motor 1702 is fixedly connected to one end of the screw conveyor 1701. A dust exhaust port is formed in a side wall of the housing 3 away from the servo motor 1702, and a dust exhaust pipe 1703 is fixed at the dust exhaust port. One end of the screw conveyor 1701 extends into the dust exhaust pipe 1703. A plugging plate 1704 is slidably installed at the end of the dust exhaust pipe 1703. An electric push rod 1705 is fixed on the top of the base 1, and a connecting member 1706 is fixed at the ejecting end of the electric push rod 1705. The top end of the connecting member 1706 is fixedly connected to the plugging plate 1704. A support block 1707 is fixed on the top of the base 1, and a T-shaped limiting rod 1708 is fixed on the surface of the support block 1707. The connecting member 1706 is slidably sleeved on the surface of the T-shaped limiting rod 1708, so that the connecting member 1706 can move more stably in the horizontal direction. When there is more dust accumulated in the housing 3, the electric push rod 1705 can be started. The ejecting end of the electric push rod 1705 extends out to drive the connecting member 1706 to move, and the connecting member 1706 can drive the plugging plate 1704 to move, so as to open the dust exhaust pipe 1703. Then, the servo motor 1702 is started, and the servo motor 1702 can drive the screw conveyor 1701 to rotate, and the screw conveyor 1701 can push the dust accumulated in the housing 3 out from the port of the dust exhaust pipe 1703.

[0021] As Figure 1 , Figure 2 and Figure 4 shown, in some embodiments, universal self-locking wheels are installed at the four corners of the bottom of the base 1 to facilitate the movement of the device. L-shaped stabilizing plates 19 are fixed on both side walls of the housing 3, and both ends of the connecting pipe 13 are fixedly connected to the corresponding L-shaped stabilizing plates 19 to improve the stability of the connecting pipe 13. Installation plates are fixed at the ends of the filter mesh plate 4 and the activated carbon filter plate 9, and U-shaped handles are fixed on the surfaces of the installation plates. The installation plates are connected to the surface of the housing 3 through screws to facilitate the disassembly and assembly of the filter mesh plate 4 and the activated carbon filter plate 9. Sockets adapted to the filter mesh plate 4 and the activated carbon filter plate 9 are respectively formed on the surface of the housing 3, and installation grooves adapted to the filter mesh plate 4 and the activated carbon filter plate 9 are respectively formed on both inner side walls of the housing 3.

[0022] A treatment process for a coating low-concentration waste gas treatment device includes the following steps: S1: Place the device at a suitable position and start the suction fan 11. The suction fan 11 generates suction force. Through the suction hood 14, connecting pipe 13, suction duct 12 and discharge duct 15, the waste gas generated during coating can be sucked into the housing 3. Under the action of the filter mesh plate 4, the dust or other particulate matters in the waste gas can be filtered out. After the waste gas passes through the filter mesh plate 4, it will pass through the activated carbon filter plate 9. Under the action of the activated carbon filter plate 9, the harmful substances in the waste gas can be adsorbed, and then the clean gas will be discharged from the exhaust duct 16; S2: When the mesh holes of the filter mesh plate 4 are blocked, affecting the ventilation effect, start the stepper motor 807. The stepper motor 807 can drive the cam 808 to rotate. With the elastic force of the second spring 804, when the cam 808 rotates, the two slide plates 803 can move left and right reciprocally in the horizontal direction. The slide plate 803 can drive the corresponding U-shaped rod 805 to move left and right reciprocally. The U-shaped rod 805 can drive the corresponding connecting rod 806 to move. The two connecting rods 806 can drive the H-shaped connecting plate 5 to move up and down reciprocally. The H-shaped connecting plate 5 can drive the vibration plate 7 to move up and down reciprocally through the first spring 6, so as to vibrate the filter mesh plate 4, and thus the mesh holes of the filter mesh plate 4 can be unclogged; S3: When there is a large accumulation of dust in the housing 3, start the electric push rod 1705. The extended end of the electric push rod 1705 can drive the connecting piece 1706 to move. The connecting piece 1706 can drive the blocking plate 1704 to move, so as to open the dust discharge pipe 1703. Then start the servo motor 1702. The servo motor 1702 can drive the auger 1701 to rotate. The auger 1701 can push the accumulated dust in the housing 3 out from the port of the dust discharge pipe 1703.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An apparatus for treating low-concentration coated waste gas, comprising a base (1), characterized in that: Four support columns (2) are symmetrically fixed to the top of the base (1). A housing (3) is fixed to the top of the four support columns (2). A filter screen plate (4) is slidably installed inside the housing (3). An H-shaped connecting plate (5) is arranged above the filter screen plate (4). The H-shaped connecting plate (5) is slidably connected inside the housing (3). Four first springs (6) are fixed to the four corners of the bottom of the H-shaped connecting plate (5). Two vibrating plates (7) for vibrating the filter screen plate (4) are symmetrically arranged below the H-shaped connecting plate (5). The bottom ends of the first springs (6) are fixedly connected to the tops of the corresponding vibrating plates (7). A driving assembly (8) for driving the H-shaped connecting plate (5) to reciprocate up and down is arranged on the base (1). An activated carbon filter plate (9) is slidably installed inside the housing (3). The activated carbon filter plate (9) is arranged above the H-shaped connecting plate (5). A top cover (10) is installed on the top of the housing (3) by screws. An air suction fan (11) is fixed to the top of the top cover (10). An air suction pipe (12) is fixed to the air suction end of the air suction fan (11). One end of the air suction pipe (12) is fixedly communicated with a connecting pipe (13). An air suction hood (14) is installed at the end of the connecting pipe (13). An air outlet pipe (15) is fixed to the air outlet end of the air suction fan (11). The bottom end of the air outlet pipe (15) is communicated with the housing (3) and is located below the filter screen plate (4). An exhaust pipe (16) is fixedly communicated with the surface of the housing (3) and is located above the activated carbon filter plate (9). A dust discharging assembly (17) is arranged at the bottom end of the housing (3).

2. The coating low-concentration waste gas treatment equipment according to claim 1, wherein: Two T-shaped sliders are symmetrically fixed to both side walls of the H-shaped connecting plate (5). Two T-shaped chutes adapted to the T-shaped sliders are symmetrically formed on both inner walls of the housing (3).

3. The coating low-concentration waste gas treatment equipment according to claim 1, characterized in that: A telescopic sleeve (18) is arranged inside each of the first springs (6). The two ends of the telescopic sleeve (18) are respectively fixedly connected to the bottom of the H-shaped connecting plate (5) and the top of the vibrating plate (7). Rubber pads are fixed to the bottoms of the vibrating plates (7).

4. The coating low-concentration waste gas treatment equipment according to claim 1, wherein: The driving component (8) includes two support plates (801) symmetrically fixed to the top of the base (1). Two T-shaped guide rods (802) are symmetrically fixed to the side walls of the two support plates (801). Two sliding plates (803) are symmetrically arranged on the top of the base (1). The sliding plates (803) are slidably sleeved on the surfaces of the corresponding two T-shaped guide rods (802). Second springs (804) are sleeved on the surfaces of the T-shaped guide rods (802). The two ends of the second springs (804) are respectively fixedly connected to the side walls of the adjacent support plates (801) and the side walls of the adjacent sliding plates (803). U-shaped rods (805) are fixed to one side wall of the two sliding plates (803). The top ends of the two U-shaped rods (805) respectively slide through the adjacent side walls of the housing (3) and are rotatably connected to a connecting rod (806) through a pin shaft. The bottom ends of the two connecting rods (806) are rotatably connected to the top of the H-shaped connecting plate (5) through a pin shaft. A stepping motor (807) is fixed to the top of the base (1). A cam (808) is fixed to the output shaft of the stepping motor (807). The two sliding plates (803) are in close contact with the cam (808).

5. The coating low-concentration waste gas treatment equipment according to claim 1, characterized in that: The dust removal component (17) includes a auger (1701) arranged at the inner bottom end of the housing (3). One end of the auger (1701) is rotatably connected to the housing (3) through a bearing. A servo motor (1702) is fixed to the surface of the housing (3). The output shaft of the servo motor (1702) is fixedly connected to one end of the auger (1701). A dust outlet is formed in the side wall of the housing (3) away from the servo motor (1702), and a dust discharge pipe (1703) is fixed at the dust outlet. One end of the auger (1701) extends into the dust discharge pipe (1703). A plugging plate (1704) is slidably installed at the end of the dust discharge pipe (1703). An electric push rod (1705) is fixed to the top of the base (1). A connecting piece (1706) is fixed to the ejecting end of the electric push rod (1705). The top end of the connecting piece (1706) is fixedly connected to the plugging plate (1704).

6. The coating low-concentration waste gas treatment equipment according to claim 5, characterized in that: A support block (1707) is fixed to the top of the base (1). A T-shaped limit rod (1708) is fixed to the surface of the support block (1707). The connecting piece (1706) is slidably sleeved on the surface of the T-shaped limit rod (1708).

7. An apparatus for treating low-concentration coated exhaust gas according to claim 1, characterized in that: Universal self-locking wheels are installed at the four corners of the bottom of the base (1). L-shaped stabilizing plates (19) are fixed to both side walls of the housing (3). The two ends of the connecting pipe (13) are respectively fixedly connected to the corresponding L-shaped stabilizing plates (19).

8. The coating low-concentration waste gas treatment equipment according to claim 1, wherein: Both ends of the filter mesh plate (4) and the activated carbon filter plate (9) are fixed with mounting plates, and U-shaped handles are fixed on the surfaces of the mounting plates. The mounting plates are connected to the surface of the housing (3) by screws. Sockets adapted to the filter mesh plate (4) and the activated carbon filter plate (9) are respectively formed on the surface of the housing (3). Mounting grooves adapted to the filter mesh plate (4) and the activated carbon filter plate (9) are respectively formed on the inner walls of both sides of the housing (3).

9. The treatment process of a coating low-concentration waste gas treatment device according to any one of claims 1-8, characterized in that: The steps are as follows: S1: Place the device at a suitable position and start the suction fan (11). The suction fan (11) generates suction force. Through the suction hood (14), the connecting pipe (13), the suction pipe (12) and the air outlet pipe (15), the waste gas generated during coating can be sucked into the housing (3). Under the action of the filter mesh plate (4), the dust or other particulate matters in the waste gas can be filtered out. After the waste gas passes through the filter mesh plate (4), it will pass through the activated carbon filter plate (9). Under the action of the activated carbon filter plate (9), the harmful substances in the waste gas can be adsorbed, and then the clean gas will be discharged from the exhaust pipe (16). S2: When the mesh holes of the filter mesh plate (4) are blocked, affecting the ventilation effect, start the stepper motor (807). The stepper motor (807) can drive the cam (808) to rotate. With the elastic force of the second spring (804), when the cam (808) rotates, the two sliding plates (803) can move left and right reciprocally in the horizontal direction. The sliding plates (803) can drive the corresponding U-shaped rods (805) to move left and right reciprocally. The U-shaped rods (805) can drive the corresponding connecting rods (806) to move. The two connecting rods (806) can drive the H-shaped connecting plate (5) to move up and down reciprocally. The H-shaped connecting plate (5) can drive the vibrating plate (7) to move up and down reciprocally through the first spring (6), so as to vibrate the filter mesh plate (4), and thus the mesh holes of the filter mesh plate (4) can be dredged. S3: When there is a large accumulation of dust in the housing (3), start the electric push rod (1705). The protruding end of the electric push rod (1705) extending out can drive the connecting piece (1706) to move. The connecting piece (1706) can drive the blocking plate (1704) to move, so as to open the dust discharge pipe (1703). Then start the servo motor (1702). The servo motor (1702) can drive the auger (1701) to rotate. The auger (1701) can push the dust accumulated in the housing (3) out from the port of the dust discharge pipe (1703).

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