A laser cutting machine with automatic cleaning

Abstract

The application discloses an automatic purifying laser cutting machine, and relates to the field of laser cutting, which comprises a base, a driving seat and a laser cutter, the driving seat is arranged above the base, the outer side of the driving seat is connected with the laser cutter, the outer side of the driving seat is connected with a smoke treatment box, the smoke treatment box is used for treating laser cutting smoke, a smoke suction head is arranged below the smoke treatment box, the upper side of the smoke suction head is connected with the smoke treatment box, the upper side of the smoke treatment box is connected with a discharge pipe, the output end of the discharge pipe is connected with a smoke suction device, and a filter plate is arranged in the smoke treatment box. The automatic purifying laser cutting machine filters the smoke through the smoke treatment box and the filter plate, the filter plate is provided with two groups, the use of the filter plate can be replaced through automatic switching of the filter plate after the filter plate is blocked, so that the filter plate can keep good filtering effect, and the switching of the filter plate does not need to stop the equipment running, thereby improving the use convenience and working efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser cutting, and particularly relates to an automatic laser cutting machine. BACKGROUND

[0002] Laser cutting is a kind of cutting method that irradiates a high-density laser beam to the surface of a workpiece to cut the material, and has higher cutting precision than traditional cutting equipment. When the laser cutting machine is used, cutting fume is generated.

[0003] Prior art 1 (Chinese patent with the application number CN202111342105.1 and published on May 16, 2023) discloses a laser cutting machine, which comprises a machine box, a cutting platform is arranged at the top end of the machine box, a frame body is fixed at the top end of the cutting platform, a reverse L-shaped supporting arm is arranged in the frame body, a sliding plate is arranged at the bottom end of the vertical part of the reverse L-shaped supporting arm, a Y-axis driving device is arranged at the top end of the cutting platform, an X-axis driving device is arranged at the front side of the horizontal part of the reverse L-shaped supporting arm, a sliding seat is drivingly connected to the X-axis driving device, an electric push rod is installed on the sliding seat, a laser cutting head is connected to the bottom end of the electric push rod, a connecting sleeve is slidingly and sealingly connected to the outer side of the laser cutting head, the connecting sleeve is fixed to the outer side of the laser cutting head through a locking assembly, a conical dust collecting hood is connected to the bottom end of the connecting sleeve, at least one fan is communicated with the outside of the conical dust collecting hood, and the fan is communicated with a purification and filtration assembly arranged at the top end of the machine box through an air suction pipeline. The laser cutting machine can effectively and quickly suck away the smoke and dust generated in the laser cutting process, and can purify the smoke and dust, thereby effectively improving the working environment. Prior art 2 (Chinese patent with the application number CN202121749628.3 and published on December 17, 2021) discloses a laser cutting machine, which comprises a base, a purification mechanism is fixedly connected to the lower surface of the base, a connecting pipe is fixedly connected to one side surface of the purification mechanism, a fixed block is fixedly sleeved on the outer curved surface of the connecting pipe, the lower surface of the fixed block is fixedly connected to the upper surface of the base, a connecting plate is fixedly connected to one side surface of the base, an extension rod is fixedly installed on the lower surface of the connecting plate, a fixed plate is fixedly connected to the bottom of the extension rod, and one side surface of the fixed plate is fixedly connected to the outer curved surface of a positioning pipe. The laser cutting machine drives the collecting cylinder to descend through the extension rod, so that the collecting cylinder is attached to the surface of the steel plate through the heat insulation ring, the motor drives the gas in the collecting cylinder to move upward through the fan blade, the gas in the cutting process is collected, and the problem that the existing laser cutting machine has poor gas collection effect and causes part of the gas to flow and diffuse in the air and pollute the environment is solved.

[0004] While current laser cutting machines can purify fumes, the process typically involves filtration. However, over extended periods, the filter structure can become clogged with impurities, leading to decreased filtration efficiency, reduced gas throughput, and reduced smoke extraction. Cleaning the filter requires stopping the machine and disassembling the device, which is cumbersome and impacts cutting efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an automatically purified laser cutting machine to solve the problems mentioned in the background art. Although current laser cutting machines can purify flue gas, the flue gas is generally purified by filtration. However, during long-term operation, the filter structure will experience a decrease in filtration efficiency due to the accumulation of impurities, resulting in a decrease in gas throughput and smoke extraction effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatically purified laser cutting machine, comprising a base, a drive base, and a laser cutter. The drive base is positioned above the base, and the laser cutter is connected to the outer side of the drive base. A fume treatment box is connected to the outer side of the drive base to treat the laser cutting fume. A smoke extraction head is positioned below the fume treatment box, and the smoke extraction head is connected to the fume treatment box above. An exhaust pipe is connected to the top of the fume treatment box, and a suction fan is connected to the output end of the exhaust pipe. A filter plate is installed inside the fume treatment box. The filter plate has an arc-shaped structure design to filter the fume discharged from the exhaust pipe. A support plate is connected below the filter plate, and a connecting shaft is connected to the middle of the support plate. A motor is connected above the connecting shaft. A through groove is opened on the side of the fume treatment box, and the filter plate passes through the through groove. The filter plates are symmetrically arranged on both sides above the support plate, with one set of filter plates located inside the fume treatment box and the other set of filter plates located outside the fume treatment box.

[0007] To further optimize this technical solution, the filter plate and the support plate are detachably connected, and the filter plate located outside the flue gas treatment box can be cleaned after being removed from the support plate.

[0008] To further optimize this technical solution, a magnetic connector is fixed below the filter plate, and a mating groove is provided above the support plate. The mating groove and the connector form a concave-convex fit structure, and a magnetic component is provided in the mating groove to attract the connector.

[0009] To further optimize this technical solution, a sealing mechanism is provided on the side of the through groove to seal the gap between the filter plate and the through groove.

[0010] To further optimize this technical solution, a pressure detector is installed inside the flue gas treatment box, and the pressure detector is located below the exhaust pipe to monitor the filtration performance of the filter plate.

[0011] Further optimize the technical solution, the sealing mechanism comprises a sealing air bag, a communication pipe, a supplementary air bag and a control mechanism;

[0012] The sealing air bag is arranged around the surface of the through groove;

[0013] The communication pipe is connected with the sealing air bag;

[0014] The supplementary air bag is arranged in the interior of the flue gas treatment box, and the supplementary air bag is connected with the sealing air bag through the communication pipe;

[0015] The control mechanism is arranged outside the supplementary air bag and controls the pressure of the supplementary air bag.

[0016] Further optimize the technical solution, the control mechanism comprises a pressing block, a first spring and an electromagnet;

[0017] The pressing block is arranged outside the supplementary air bag, and a horizontal sliding structure is formed between the pressing block and the flue gas treatment box, and the pressing block is made of a magnetic material;

[0018] The first spring is arranged outside the pressing block and provides a pushing force for the pressing block;

[0019] The electromagnet is arranged outside the pressing block and attracts the pressing block when energized.

[0020] Further optimize the technical solution, the upper end of the smoking head is connected with a connecting hose, the smoking head is connected with the flue gas treatment box through the connecting hose, and an oscillating mechanism is arranged at the upper end of the smoking head.

[0021] Further optimize the technical solution, the oscillating mechanism comprises a rotating shaft and a driving mechanism;

[0022] The rotating shaft is fixed at the upper end of the smoking head, and a rotating connection is formed between the rotating shaft and the flue gas treatment box;

[0023] The driving mechanism is connected with the rotating shaft to control the rotation of the rotating shaft.

[0024] Further optimize the technical solution, the driving mechanism comprises a rotating blade, a mounting shaft, an auxiliary shaft, a first gear, a second gear, a movable shaft, a pressing wheel, a movable plate, a second spring and a transmission gear;

[0025] The rotating blade is arranged above the connecting hose;

[0026] The mounting shaft is rotatably arranged in the interior of the flue gas treatment box, and the mounting shaft is fixedly connected with the rotating blade;

[0027] The auxiliary shaft is rotatably arranged in the interior of the flue gas treatment box, and the auxiliary shaft is connected with the mounting shaft through a transmission belt;

[0028] The first gear is fixed above the auxiliary shaft;

[0029] The second gear is arranged outside the first gear and engaged with the first gear, and the diameter of the second gear is larger than that of the first gear;

[0030] The movable shaft is fixed in the middle of the second gear, and the movable shaft and the flue gas treatment box are rotationally connected;

[0031] The extrusion wheel is fixed above the movable shaft, and the center of the extrusion wheel is arranged staggered with the center of the movable shaft;

[0032] The movable plate is arranged outside the extrusion wheel, and the movable plate and the flue gas treatment box are connected in a front and back sliding structure;

[0033] The second spring is arranged at the rear side of the movable plate to provide a thrust for the movable plate;

[0034] The transmission gear is arranged outside the movable plate and connected with the movable plate in an engagement manner, and the transmission gear is fixed on the upper end of the rotating shaft.

[0035] Compared with the prior art, the beneficial effects of the present application are:

[0036] The flue gas is filtered by the flue gas treatment box cooperating with the filter plate, and the filter plate is provided with two groups, and after the filter plate is blocked, the use of the filter plate can be replaced by automatic switching of the filter plate, so that the filter effect is maintained, and the filter plate switching does not need to stop the equipment running, improving the use convenience and work efficiency.

[0037] The air pressure detector can detect the air pressure below the discharge pipe, and when the filter plate is blocked, the air pressure below the discharge pipe decreases, so that the blockage of the filter plate can be known in time, and the subsequent rotation of the support disc can realize the automatic switching of the filter plate.

[0038] The sealing air bag can seal the connection between the filter plate and the through groove, so that the subsequent air pressure detection remains accurate, and smoke leakage can also be avoided, and the volume of the sealing air bag can be controlled, facilitating subsequent switching of the filter plate.

[0039] The filter plate and the support disc are detachably connected, and when the filter plate is turned out of the flue gas treatment box, it can be conveniently removed from the support disc, so that the filter plate can be replaced or cleaned without disassembling the equipment, and the operation is convenient.

[0040] The smoking head can reciprocally swing below the flue gas treatment box, so as to improve the smoking range of the smoking head and improve the treatment effect of the device on flue gas, and the rotation power of the smoking head comes from airflow driving, reducing the setting of power source and making the device more energy-saving. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1It is a three-dimensional structure schematic diagram of the driving seat of the application;

[0042] Figure 2 It is a three-dimensional structure schematic diagram of the driving seat of the application;

[0043] Figure 3 It is a top view structure schematic diagram of the flue gas treatment box of the application;

[0044] Figure 4 It is a side view structure schematic diagram of the flue gas treatment box of the application;

[0045] Figure 5 It is a top view structure schematic diagram of the flue gas treatment box of the application;

[0046] Figure 6 It is a main view structure schematic diagram of the flue gas treatment box of the application;

[0047] Figure 7 It is a three-dimensional structure schematic diagram of the filter plate of the application;

[0048] Figure 8 It is a three-dimensional structure schematic diagram of the filter plate and the supporting disc of the application;

[0049] Figure 9 It is a side view structure schematic diagram of the supplementary air bag of the application;

[0050] Figure 10 It is a top view structure schematic diagram of the rotating blade of the application.

[0051] In the figure: 1, base; 2, driving seat; 3, laser cutter; 4, flue gas treatment box; 5, smoke suction head; 6, exhaust pipe; 7, air suction device; 8, connecting hose; 9, filter plate; 10, supporting disc; 11, connecting shaft; 12, motor; 13, through groove; 14, air pressure detector; 15, sealing air bag; 16, connecting pipe; 17, supplementary air bag; 18, pressing block; 19, first spring; 20, electromagnet; 21, butt joint; 22, butt joint groove; 23, rotating shaft; 24, rotating blade; 25, mounting shaft; 26, auxiliary shaft; 27, first gear; 28, second gear; 29, movable shaft; 30, extrusion wheel; 31, movable plate; 32, second spring; 33, transmission gear. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0053] Please refer to Figures 1-10The embodiment one provides the following technical scheme: an automatic purifying laser cutting machine, comprising a base 1, a driving seat 2 and a laser cutting device 3, the driving seat 2 is arranged above the base 1, and the outer side of the driving seat 2 is connected with the laser cutting device 3, the outer side of the driving seat 2 is connected with a flue gas treatment box 4, the flue gas treatment box 4 is used for treating laser cutting flue gas, a smoke suction head 5 is arranged below the flue gas treatment box 4, the upper side of the smoke suction head 5 is connected with the flue gas treatment box 4, and the upper side of the flue gas treatment box 4 is connected with a discharge pipe 6, the output end of the discharge pipe 6 is connected with a smoke exhauster 7, a filter plate 9 is arranged in the flue gas treatment box 4, the filter plate 9 is designed in a circular arc structure, and the flue gas discharged from the discharge pipe 6 is filtered, a supporting disc 10 is connected below the filter plate 9, a connecting shaft 11 is connected in the middle of the supporting disc 10, a motor 12 is connected above the connecting shaft 11, a through slot 13 is arranged in the side of the flue gas treatment box 4, the filter plate 9 penetrates through the through slot 13, the filter plate 9 is symmetrically arranged above and below the supporting disc 10, one group of filter plates 9 is arranged inside the flue gas treatment box 4, and the other group of filter plates 9 is arranged outside the flue gas treatment box 4, the filter plate 9 and the supporting disc 10 are detachably connected, the filter plate 9 arranged outside the flue gas treatment box 4 can be removed from the supporting disc 10 and cleaned, a magnetic butt joint 21 is fixed below the filter plate 9, a butt joint groove 22 is arranged above the supporting disc 10, the butt joint groove 22 and the butt joint 21 form a concave-convex matching structure, and a magnetic part is arranged in the butt joint groove 22 to attract the butt joint 21.

[0054] In use, the workpiece is placed above the base 1, the laser cutting device 3 is controlled to move by the driving seat 2, the workpiece is cut, the flue gas treatment box 4 is attracted by the smoke exhauster 7 in cooperation with the discharge pipe 6, negative pressure is generated in the flue gas treatment box 4, the smoke suction head 5 generates suction force, the cutting flue gas is sucked into the flue gas treatment box 4, the flue gas is purified by the filter plate 9 and then enters the discharge pipe 6 and is discharged, the purification of the flue gas is realized, when the filter plate 9 is blocked and needs to be treated, the supporting disc 10 is rotated by the motor 12 controlling the connecting shaft 11, the filter plate 9 is moved, the filter plate 9 is switched, the filter plate 9 in the flue gas treatment box 4 can be pulled out from above the supporting disc 10, and the filter plate 9 is conveniently cleaned or replaced.

[0055] The embodiment two is based on the embodiment one, the side of the through groove 13 is provided with the sealing mechanism, the gap between the filter plate 9 and the through groove 13 is sealed, the inside of the smoke treatment box 4 is provided with the air pressure detector 14, and the air pressure detector 14 is located below the exhaust pipe 6, the filtering performance of the filter plate 9 is monitored, the sealing mechanism comprises the sealing air bag 15, the communication pipe 16, the supplementary air bag 17 and the control mechanism, the sealing air bag 15 is arranged around the surface of the through groove 13, the communication pipe 16 is communicated with the sealing air bag 15, the supplementary air bag 17 is arranged in the inside of the smoke treatment box 4, the supplementary air bag 17 is communicated with the sealing air bag 15 through the communication pipe 16, the control mechanism is arranged outside the supplementary air bag 17 to control the pressure of the supplementary air bag 17, the control mechanism comprises the pressure block 18, the first spring 19 and the electromagnet 20, the pressure block 18 is arranged outside the supplementary air bag 17, and the pressure block 18 and the smoke treatment box 4 form a horizontal sliding structure, and the pressure block 18 is made of magnetic material, the first spring 19 is arranged outside the pressure block 18 to provide a pushing force for the pressure block 18, and the electromagnet 20 is arranged outside the pressure block 18 and attracts the pressure block 18 when powered.

[0056] When the filter plate 9 is blocked, the gas throughput of the filter plate 9 decreases, at this time, the air pressure detector 14 detects that the air pressure decreases, reaches the corresponding value, and can cooperate with the program to automatically control the operation of the motor 12, the motor 12 and the electromagnet 20 are connected in series, the electromagnet 20 attracts the pressure block 18 when powered, the pressure of the pressure block 18 on the supplementary air bag 17 is released, the volume of the sealing air bag 15 is reduced, the motor 12 drives the connecting shaft 11 and the support disc 10 to rotate, drives the filter plate 9 to move and switch, after switching, the motor 12 and the electromagnet 20 are powered off, the first spring 19 pushes the pressure block 18 to extrude the supplementary air bag 17, the supplementary air bag 17 sends the gas into the sealing air bag 15 through the communication pipe 16, so that the sealing air bag 15 is inflated, and the gap between the filter plate 9 and the through groove 13 is sealed.

[0057] In the third embodiment, the upper end of the smoking head 5 is connected with a connecting hose 8, the smoking head 5 is connected with the smoke treatment box 4 through the connecting hose 8, and the upper end of the smoking head 5 is provided with a swing mechanism. The swing mechanism comprises a rotating shaft 23 and a driving mechanism. The rotating shaft 23 is fixed at the upper end of the smoking head 5 and is rotatably connected with the smoke treatment box 4. The driving mechanism is connected with the rotating shaft 23 to control the rotation of the rotating shaft 23. The driving mechanism comprises a rotating blade 24, a mounting shaft 25, an auxiliary shaft 26, a first gear 27, a second gear 28, a movable shaft 29, a squeezing wheel 30, a movable plate 31, a second spring 32 and a transmission gear 33. The rotating blade 24 is arranged at the upper end of the connecting hose 8. The mounting shaft 25 is rotatably arranged in the smoke treatment box 4 and is fixedly connected with the rotating blade 24. The auxiliary shaft 26 is rotatably arranged in the smoke treatment box 4 and is connected with the mounting shaft 25 through a transmission belt. The first gear 27 is fixed at the upper end of the auxiliary shaft 26. The second gear 28 is arranged at the outer side of the first gear 27 and is engaged with the first gear 27. The diameter of the second gear 28 is larger than that of the first gear 27. The movable shaft 29 is fixed at the middle part of the second gear 28 and is rotatably connected with the smoke treatment box 4. The squeezing wheel 30 is fixed at the upper end of the movable shaft 29. The center of the squeezing wheel 30 is arranged in a staggered manner with the center of the movable shaft 29. The movable plate 31 is arranged at the outer side of the squeezing wheel 30 and is slidably arranged in the smoke treatment box 4. The second spring 32 is arranged at the rear side of the movable plate 31 to provide a pushing force for the movable plate 31. The transmission gear 33 is arranged at the outer side of the movable plate 31 and is engaged with the movable plate 31. The transmission gear 33 is fixed at the upper end of the rotating shaft 23.

[0058] When the smoke is treated, the airflow drives the rotating blade 24 and the mounting shaft 25 to rotate through the rotating blade 24. The mounting shaft 25 drives the auxiliary shaft 26 to rotate through the transmission belt. The auxiliary shaft 26 realizes the speed reduction effect through the engagement of the first gear 27 and the second gear 28. The second gear 28 drives the movable shaft 29 and the squeezing wheel 30 to rotate. The squeezing wheel 30 rotates eccentrically to drive the movable plate 31 to reciprocate through the second spring 32. The movable plate 31 drives the rotating shaft 23 to reciprocate through the engagement of the transmission gear 33. The rotating shaft 23 drives the smoking head 5 to swing, thereby improving the smoking range.

[0059] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0060] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "install" and the like connecting words should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic purification laser cutting machine, comprising a base (1), a drive seat (2) and a laser cutter (3), wherein the drive seat (2) is disposed above the base (1) and the laser cutter (3) is connected to the outside of the drive seat (2). Its features are: The drive seat (2) is connected to the outside of the flue gas treatment box (4). A smoke head (5) is provided below the flue gas treatment box (4). The smoke head (5) is connected to the flue gas treatment box (4) above. An exhaust pipe (6) is connected above the flue gas treatment box (4). A suction fan (7) is connected to the output end of the exhaust pipe (6). A filter plate (9) is provided inside the flue gas treatment box (4). The filter plate (9) has an arc-shaped structure design. A support plate (10) is connected below the filter plate (9). A connecting shaft (11) is connected in the middle of the support plate (10). A motor (12) is connected above the connecting shaft (11). A through groove (13) is opened on the side of the flue gas treatment box (4). The filter plate (9) passes through the through groove (13). The filter plates (9) are symmetrically arranged on the left and right sides above the support plate (10). One set of filter plates (9) is located inside the flue gas treatment box (4), and another set of filter plates (9) is located outside the flue gas treatment box (4). A sealing mechanism is provided on the side of the through groove (13) to seal the gap between the filter plate (9) and the through groove (13); The sealing mechanism includes a sealing airbag (15), a connecting pipe (16), a replenishing airbag (17), and a control mechanism; A sealing airbag (15) is arranged around the surface of the through groove (13); The connecting pipe (16) is connected to the sealing airbag (15); A supplementary airbag (17) is installed inside the flue gas treatment box (4). The supplementary airbag (17) is connected to the sealing airbag (15) through a connecting pipe (16). The control mechanism is located on the outside of the supplementary airbag (17) to control the pressure of the supplementary airbag (17); The control mechanism includes a pressure block (18), a first spring (19), and an electromagnet (20). The pressure block (18) is located on the outside of the supplementary air bag (17), and the pressure block (18) and the flue gas treatment box (4) form a horizontal sliding structure, and the pressure block (18) is made of magnetic material. The first spring (19) is located on the outside of the pressure block (18) to provide a squeezing force to the pressure block (18); An electromagnet (20) is placed on the outside of the pressure block (18) and attracts the pressure block (18) when energized.

2. The automatically cleaned laser cutting machine according to claim 1, characterized in that: The filter plate (9) and the support plate (10) are detachably connected. The filter plate (9) located outside the flue gas treatment box (4) can be cleaned after being removed from the support plate (10).

3. An automatically cleaned laser cutting machine according to claim 1 or 2, characterized in that: A magnetic connector (21) is fixed below the filter plate (9), and a docking groove (22) is provided above the support plate (10). The docking groove (22) and the connector (21) form a concave-convex fit structure, and a magnetic element is provided in the docking groove (22) to attract the connector (21).

4. The automatically cleaned laser cutting machine according to claim 1, characterized in that: The flue gas treatment box (4) is equipped with a pressure detector (14), which is located below the discharge pipe (6) to monitor the filtration performance of the filter plate (9).

5. The automatically cleaned laser cutting machine according to claim 1, characterized in that: A connecting hose (8) is connected above the smoking head (5), and the smoking head (5) is connected to the flue gas treatment box (4) through the connecting hose (8). A swing mechanism is provided above the smoking head (5).

6. The automatically cleaned laser cutting machine according to claim 5, characterized in that: The swing mechanism includes a rotating shaft (23) and a driving mechanism; The rotating shaft (23) is fixed above the smoking head (5), and the rotating shaft (23) and the flue gas treatment box (4) are connected by a rotation. The drive mechanism is connected to the rotating shaft (23) to control the rotation of the rotating shaft (23).

7. The automatically cleaned laser cutting machine according to claim 6, characterized in that: The drive mechanism includes a rotating blade (24), a mounting shaft (25), an auxiliary shaft (26), a first gear (27), a second gear (28), a movable shaft (29), a pressing wheel (30), a movable plate (31), a second spring (32), and a transmission gear (33). A rotating blade (24) is positioned above the connecting hose (8); The mounting shaft (25) is rotatably installed inside the flue gas treatment box (4), and the mounting shaft (25) and the rotating blade (24) are fixedly connected; An auxiliary shaft (26) is rotatably installed inside the flue gas treatment box (4), and the auxiliary shaft (26) is connected to the mounting shaft (25) via a transmission belt; The first gear (27) is fixed above the auxiliary shaft (26); The second gear (28) is located outside the first gear (27) and meshes with the first gear (27), and the diameter of the second gear (28) is larger than the diameter of the first gear (27); The movable shaft (29) is fixed in the middle of the second gear (28), and a rotatable connection is formed between the movable shaft (29) and the flue gas treatment box (4); The extrusion wheel (30) is fixed above the movable shaft (29), and the center of the extrusion wheel (30) and the center of the movable shaft (29) are offset from each other; The movable plate (31) is located on the outside of the extrusion wheel (30), and the movable plate (31) and the flue gas treatment box (4) form a front-to-back sliding structure; The second spring (32) is located on the rear side of the movable plate (31) to provide thrust to the movable plate (31); The transmission gear (33) is set on the outside of the movable plate (31) and forms a meshing connection between the movable plate (31), and the transmission gear (33) is fixed on the upper end of the rotating shaft (23).

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