Laser cutting machine with automatic purification function

Abstract

The invention discloses an automatic purification laser cutting machine, and relates to the field of laser cutting, the automatic purification laser cutting machine 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 flue gas treatment box, laser cutting flue gas is treated, and the laser cutter is connected with the flue gas treatment box. A smoke suction head is arranged below the smoke treatment box, the upper portion of the smoke suction head is connected with the smoke treatment box, a discharge pipe is connected to the upper portion of the smoke treatment box, the output end of the discharge pipe is connected with an air suction device, and a filter plate is arranged in the smoke treatment box. According to the laser cutting machine with the automatic purification function, the smoke treatment box is matched with the filter plates to filter smoke, the two sets of filter plates are arranged, after the filter plates are blocked, the filter plates can be replaced through automatic switching of the filter plates, and therefore the good filtering effect is kept, equipment operation does not need to be stopped during switching of the filter plates, and the working efficiency is improved. And the use convenience and the working efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, in particular to an automatic purification laser cutting machine. Background Art

[0002] Laser cutting is a process of cutting materials by emitting a high-density laser beam onto the surface of the workpiece. Compared with traditional cutting equipment, it has higher cutting accuracy. When a laser cutting machine is used, it will also be accompanied by the generation of cutting fumes.

[0003] Prior art 1 (application number CN202111342105.1, Chinese patent published on May 16, 2023) A laser cutting machine includes a chassis, a cutting platform is provided at the top of the chassis, a frame is fixed to the top of the cutting platform, an inverted L-shaped support arm is provided inside the frame, and a sliding plate is provided at the bottom end of the vertical part of the inverted L-shaped support arm. A Y-axis drive device is provided at the top of the cutting platform, and an X-axis drive device is provided on the front side of the horizontal part of the inverted L-shaped support arm. The X-axis drive device is driven and connected to a sliding seat, and an electric push rod is installed on the sliding seat. The bottom end of the electric push rod is connected to a laser cutting head, and the outer side of the laser cutting head is slidingly and sealingly connected to a connecting sleeve. The connecting sleeve is fixed to the outer side of the laser cutting head through a locking assembly. The bottom end of the connecting sleeve is connected to a conical dust collecting hood, and at least one fan is connected to the outside of the conical dust collecting hood. The fan is connected to the purification and filtering assembly located at the top of the chassis through an exhaust pipe. It can effectively and quickly extract the smoke and dust generated during the laser cutting process, and can purify the smoke and dust, effectively improving the working environment; Prior art 2 (application number CN202121749628.3, Chinese patent published on December 17, 2021) A laser cutting machine includes a base, the lower surface of the base is fixedly connected to a purification mechanism, one side surface of the purification mechanism is fixedly connected to a connecting pipe, the outer curved surface of the connecting pipe is fixedly sleeved with a fixed block, the lower surface of the fixed block is fixedly connected to the upper surface of the base, one side surface of the base is fixedly connected to a connecting plate, the lower surface of the connecting plate is fixedly installed with a telescopic rod, the bottom of the telescopic rod is fixedly connected to a fixed plate, and one side surface of the fixed plate is fixedly connected to the outer curved surface of the positioning tube. The laser cutting machine drives the collection tube down through a telescopic rod, so that the collection tube is attached to the surface of the steel plate through a heat-insulating ring. The electric motor mobilizes the gas inside the collection tube to move upward through the fan blades, thereby collecting the gas during cutting. This solves the problem that the existing laser cutting machine is not effective in collecting this type of exhaust gas, causing some gas to be lost and diffused in the air, polluting the environment.

[0004] Although the current laser cutting machine can purify the flue gas, when processing the flue gas, the flue gas is generally purified by filtering it. When running for a long time, the filter structure will cause the filtration efficiency to decrease due to the accumulation of impurities, and the gas flow rate and the smoking effect will decrease. When cleaning the filter structure, it is necessary to suspend the equipment operation and disassemble the device, which is more cumbersome and affects its cutting efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic purification laser cutting machine to solve the problem raised in the above background technology that although the current laser cutting machine can purify the flue gas, when treating the flue gas, the flue gas is generally purified by filtering it. When running for a long time, the filter structure will cause the accumulation of impurities, etc., which will lead to a decrease in filtration efficiency, a decrease in gas throughput and smoking effect.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an automatic purification laser cutting machine, comprising a base, a driving seat and a laser cutter, the driving seat being arranged above the base, and the laser cutter being connected to the outer side of the driving seat, the outer side of the driving seat being connected to a flue gas treatment box for treating the laser cutting flue gas, a cigarette head being arranged below the flue gas treatment box, the top of the cigarette head being connected to the flue gas treatment box, and an exhaust pipe being connected above the flue gas treatment box, the output end of the exhaust pipe being connected to an air suction device, a filter plate being arranged inside the flue gas treatment box, the filter plate being designed with an arc-shaped structure, filtering the flue gas discharged from the exhaust pipe, a support plate being connected below the filter plate, and a connecting shaft being connected to the middle of the support plate, and a motor being connected above the connecting shaft, a through slot being provided on the side of the flue gas treatment box, the filter plate passing through the through slot, the filter plates being symmetrically arranged left and right above the support plate, one group of filter plates being located inside the flue gas treatment box, and the other group of filter plates being located outside the flue gas treatment box.

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

[0008] To further optimize this technical solution, a magnetic docking joint is fixed under the filter plate, a docking groove is provided above the support plate, a concave-convex matching structure is formed between the docking groove and the docking joint, and a magnetic part is provided in the docking groove to attract the docking joint.

[0009] To further optimize the 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 the technical solution, an air pressure detector is installed inside the flue gas treatment box, and the air pressure detector is located below the exhaust pipe to monitor the filtering performance of the filter plate.

[0011] Further optimizing the technical solution, the sealing mechanism includes a sealing airbag, a connecting tube, a supplementary airbag and a control mechanism; A sealing air bag is arranged around the surface of the through groove; A connecting pipe, connected to the sealing airbag; The supplementary air bag is arranged inside the flue gas treatment box and is connected to the sealing air bag through a connecting pipe; The control mechanism is arranged on the outside of the supplementary air bag to control the pressure of the supplementary air bag.

[0012] Further optimizing the technical solution, the control mechanism includes a pressure block, a first spring and an electromagnet; The pressing block is arranged on the outside of 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 magnetic material; A first spring is provided on the outside of the pressing block to provide an extruding force for the pressing block; The electromagnet is arranged on the outside of the pressing block and attracts the pressing block when energized.

[0013] To further optimize the technical solution, a connecting hose is connected to the top of the cigarette head, the cigarette head is connected to the smoke treatment box through the connecting hose, and a swing mechanism is provided above the cigarette head.

[0014] Further optimizing the technical solution, the swing mechanism includes a rotating shaft and a driving mechanism; The rotating shaft is fixed above the smoking head, and a rotation connection is formed between the rotating shaft and the smoke treatment box; The driving mechanism is connected to the rotating shaft to control the rotation of the rotating shaft.

[0015] Further optimizing the technical solution, the driving mechanism includes a rotating blade, a mounting shaft, an auxiliary shaft, a first gear, a second gear, a movable shaft, an extrusion wheel, a movable plate, a second spring and a transmission gear; A rotating blade is arranged above the connecting hose; The installation shaft is rotatably installed inside the flue gas treatment box, and the installation shaft and the rotating blade are fixedly connected; An auxiliary shaft is rotatably mounted inside the flue gas treatment box, and the auxiliary shaft is connected to the mounting shaft via a transmission belt; A first gear is fixed above the auxiliary shaft; The second gear is arranged on the outside of the first gear and meshes with the first gear, and the diameter of the second gear is larger than the diameter of the first gear; A movable shaft is fixed to the middle of the second gear, and a rotation connection is formed between the movable shaft and the flue gas treatment box; The extrusion wheel is fixed above the movable shaft, and the center of the extrusion wheel and the center of the movable shaft are staggered; The movable plate is arranged on the outside of the extrusion wheel, and a front-to-back sliding structure is formed between the movable plate and the flue gas treatment box; a second spring, arranged at the rear side of the movable plate to provide thrust for the movable plate; The transmission gear is arranged on the outer side of the movable plate and is meshed with the movable plate to form a meshing connection, and the transmission gear is fixed to the upper end of the rotating shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The flue gas is filtered through a flue gas treatment box in combination with filter plates, and two groups of filter plates are provided. When the filter plates are clogged, the filter plates can be replaced by automatic switching, thereby maintaining a good filtering effect. The switching of the filter plates does not require stopping the equipment, thereby improving its convenience of use and work efficiency.

[0017] The air pressure below the discharge pipe can be detected by the air pressure detector. When the filter plate is blocked, the air pressure below the discharge pipe decreases, so that the blockage condition of the filter plate can be known in time. Subsequently, the filter plate can be automatically switched by coordinating with the rotation of the support plate.

[0018] By setting up the sealing airbag, the connection between the filter plate and the through slot can be sealed, so that the subsequent air pressure detection remains accurate and smoke leakage can be avoided. The volume of the sealing airbag can be controlled, which facilitates the subsequent switching of the filter plate.

[0019] The filter plate and the support plate are detachably connected. When the filter plate is rotated out of the flue gas treatment box, it can be easily removed from the support plate to replace or clean the filter plate without disassembling the equipment, which is easy to operate.

[0020] The cigarette head can swing back and forth under the smoke treatment box, thereby increasing the smoking range of the cigarette head and improving the smoke treatment effect of the device. The rotational power of the cigarette head comes from the air flow drive, which reduces the power source setting and makes the device more energy-efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the drive seat of the present invention; Figure 3 This is a schematic diagram of the top view of the flue gas treatment box of the present invention; Figure 4 This is a schematic side view of the structure of the flue gas treatment box of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the flue gas treatment box of the present invention; Figure 6 This is a schematic diagram of the main cross-sectional structure of the flue gas treatment box of the present invention; Figure 7Schematic diagram of the three-dimensional structure of the filter plate of the present invention; Figure 8 This is a schematic diagram of the separation structure of the filter plate and the support plate of the present invention; Figure 9 A schematic diagram of the side cross-sectional structure of the supplementary airbag of the present invention; Figure 10 This is a schematic diagram of the top view of the rotating blade structure of the present invention.

[0022] In the figure: 1. Base; 2. Drive base; 3. Laser cutter; 4. Flue gas treatment box; 5. Cigarette holder; 6. Exhaust pipe; 7. Air suction device; 8. Connecting hose; 9. Filter plate; 10. Support plate; 11. Connecting shaft; 12. Motor; 13. Through slot; 14. Air pressure detector; 15. Sealing airbag; 16. Connecting pipe; 17. Supplementary airbag; 18. Pressing block; 19. First spring; 20. Electromagnet; 21. Docking head; 22. Docking slot; 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

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1-10, Embodiment 1: The present invention provides the following technical solutions: an automatic purification laser cutting machine, comprising a base 1, a driving base 2 and a laser cutter 3, the driving base 2 is arranged above the base 1, and the outer side of the driving base 2 is connected to the laser cutter 3, the outer side of the driving base 2 is connected to a smoke treatment box 4 for treating the laser cutting smoke, a smoking head 5 is arranged below the smoke treatment box 4, the upper part of the smoking head 5 is connected to the smoke treatment box 4, and the upper part of the smoke treatment box 4 is connected to an exhaust pipe 6, the output end of the exhaust pipe 6 is connected to an air suction device 7, a filter plate 9 is arranged inside the smoke treatment box 4, the filter plate 9 is designed in an arc-shaped structure, and the smoke discharged from the exhaust pipe 6 is filtered, the filter plate 9 is connected to a support plate 10 below the filter plate 9, and the support plate 10 is connected to the support plate 10. A connecting shaft 11 is connected to the middle of the disk 10, and a motor 12 is connected above the connecting shaft 11. A through slot 13 is provided on the side of the flue gas treatment box 4, and the filter plate 9 passes through the through slot 13. The filter plates 9 are symmetrically arranged above the support disk 10. One group of filter plates 9 is located inside the flue gas treatment box 4, and the other group of filter plates 9 is located outside the flue gas treatment box 4. A detachable connection is formed between the filter plates 9 and the support disk 10. The filter plates 9 located outside the flue gas treatment box 4 can be cleaned after being removed from the support disk 10. A magnetic docking joint 21 is fixed under the filter plate 9, and a docking groove 22 is provided above the support disk 10. A concave-convex matching structure is formed between the docking groove 22 and the docking joint 21, and a magnetic part is provided in the docking groove 22 to attract the docking joint 21.

[0025] When in use, place the workpiece on top of the base 1, control the laser cutter 3 to move through the drive seat 2 to cut the workpiece, and use the suction device 7 to cooperate with the exhaust pipe 6 to suck the flue gas treatment box 4 to generate negative pressure inside. The cigarette head 5 generates suction to suck the cutting flue gas into the flue gas treatment box 4. After the flue gas enters the flue gas treatment box 4, it is purified by the filter plate 9 and then enters the exhaust pipe 6 to be discharged, thereby achieving flue gas purification. When the filter plate 9 is blocked and needs to be processed later, the motor 12 can control the connecting shaft 11 to drive the support plate 10 to rotate, so that it drives the filter plate 9 to move, and the filter plate 9 is switched for use. The filter plate 9 that is rotated out of the flue gas treatment box 4 can be pulled out from above the support plate 10, which is convenient for cleaning or replacement.

[0026] Example 2: Based on Example 1, a sealing mechanism is disclosed in which the side of the through groove 13 is provided to seal the gap between the filter plate 9 and the through groove 13. An air pressure detector 14 is installed inside the flue gas treatment box 4, and the air pressure detector 14 is located below the exhaust pipe 6 to monitor the filtering performance of the filter plate 9. The sealing mechanism includes a sealing airbag 15, a connecting pipe 16, a supplementary airbag 17 and a control mechanism. The sealing airbag 15 is arranged around the surface of the through groove 13, the connecting pipe 16 is connected to the sealing airbag 15, and the supplementary airbag 17 is arranged inside the flue gas treatment box 4. The supplementary air bag 17 is connected to the sealing air bag 15 through the connecting tube 16. The control mechanism is arranged on the outside of the supplementary air bag 17 to control the pressure of the supplementary air bag 17. The control mechanism includes a pressure block 18, a first spring 19 and an electromagnet 20. The pressure block 18 is arranged on the outside of the supplementary air bag 17, and a horizontal sliding structure is formed between the pressure block 18 and the flue gas treatment box 4, and the pressure block 18 is made of magnetic material. The first spring 19 is arranged on the outside of the pressure block 18 to provide an extrusion force for the pressure block 18. The electromagnet 20 is arranged on the outside of the pressure block 18 to attract the pressure block 18 when power is turned on.

[0027] When the filter plate 9 is clogged, the gas flow rate of the filter plate 9 decreases. At this time, the air pressure detector 14 will detect the decrease in air pressure. After reaching the corresponding value, it can cooperate with the program to automatically control the operation of the motor 12. The motor 12 and the electromagnet 20 are connected in a series circuit. When the electromagnet 20 is energized, the pressure block 18 is attracted, and the squeezing of the supplementary air bag 17 by the pressure block 18 is released. The volume of the sealing air bag 15 is reduced, and the motor 12 drives the connecting shaft 11 and the support plate 10 to rotate, driving the filter plate 9 to move and switch it. After the switching is completed, the motor 12 and the electromagnet 20 are de-energized, and the first spring 19 pushes the pressure block 18 to squeeze the supplementary air bag 17. The supplementary air bag 17 sends gas into the sealing air bag 15 through the connecting pipe 16, causing it to expand and seal the gap between the filter plate 9 and the through groove 13.

[0028] Embodiment 3: Based on embodiment 1, a connecting hose 8 is connected to the top of the cigarette head 5, and the cigarette head 5 is connected to the smoke treatment box 4 through the connecting hose 8, and a swing mechanism is provided above the cigarette head 5. The swing mechanism includes a rotating shaft 23 and a driving mechanism. The rotating shaft 23 is fixed above the cigarette head 5, and a rotation connection is formed between the rotating shaft 23 and the smoke treatment box 4. The driving mechanism is connected to the rotating shaft 23 to control the rotation of the rotating shaft 23. The driving 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, an extrusion wheel 30, a movable plate 31, a second spring 32 and a transmission gear 33. The rotating blade 24 is provided above the connecting hose 8, the mounting shaft 25 is rotatably installed inside the smoke treatment box 4, the mounting shaft 25 and the rotating blade 24 are fixedly connected, and the auxiliary shaft 26 is rotatably installed inside the smoke treatment box 4 The first gear 27 is fixed above the auxiliary shaft 26, and the second gear 28 is arranged on the outside of 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 rotation 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 staggered. The movable plate 31 is arranged on the outside of the extrusion wheel 30, and a front and rear sliding structure is formed between the movable plate 31 and the flue gas treatment box 4. The second spring 32 is arranged on the rear side of the movable plate 31 to provide thrust for the movable plate 31. The transmission gear 33 is arranged on the outside of the movable plate 31 and meshes with the movable plate 31, and the transmission gear 33 is fixed to the upper end of the rotating shaft 23.

[0029] When treating the smoke, the airflow drives the rotating blades 24 and the mounting shaft 25 to rotate through the rotating blades 24. The mounting shaft 25 drives the auxiliary shaft 26 to rotate through the transmission belt. The auxiliary shaft 26 achieves a deceleration 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 extrusion wheel 30 to rotate. The eccentric rotation of the extrusion wheel 30 cooperates with the second spring 32 to drive the movable plate 31 to move back and forth. The movable plate 31 drives the rotating shaft 23 to rotate back and forth through the engagement with the transmission gear 33. The rotating shaft 23 drives the cigarette head 5 to swing, thereby increasing its smoking range.

[0030] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "dispose," "install," and other conjunctions should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic cleaning laser cutting machine, comprising a base (1), a drive base (2) and a laser cutter (3), wherein the drive base (2) is arranged above the base (1), and the outer side of the drive base (2) is connected to the laser cutter (3); Its characteristics are: The outside of the driving seat (2) is connected to a flue gas treatment box (4), a cigarette holder (5) is provided below the flue gas treatment box (4), the top of the cigarette holder (5) is connected to the flue gas treatment box (4), and the top of the flue gas treatment box (4) is connected to an exhaust pipe (6), the output end of the exhaust pipe (6) is connected to an air suction device (7), a filter plate (9) is provided inside the flue gas treatment box (4), the filter plate (9) is designed in an arc-shaped structure, the bottom of the filter plate (9) is connected to a support disk (10), and the middle of the support disk (10) is connected to a connecting shaft (11), and the top of the connecting shaft (11) is connected to a motor (12), a through slot (13) is provided on the side of the flue gas treatment box (4), the filter plate (9) passes through the through slot (13), the filter plate (9) is symmetrically arranged on the left and right above the support disk (10), one group of filter plates (9) is located inside the flue gas treatment box (4), and the other group of filter plates (9) is located outside the flue gas treatment box (4).

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

3. The automatic cleaning laser cutting machine according to claim 1 or 2, characterized in that: A magnetic docking joint (21) is fixed below the filter plate (9), and a docking groove (22) is provided above the support plate (10). A concave-convex matching structure is formed between the docking groove (22) and the docking joint (21), and a magnetic part is provided in the docking groove (22) to attract the docking joint (21).

4. The automatic cleaning laser cutting machine according to claim 1, characterized in that: 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).

5. The automatic cleaning laser cutting machine according to claim 4, characterized in that: An air pressure detector (14) is installed inside the flue gas treatment box (4), and the air pressure detector (14) is located below the exhaust pipe (6) to monitor the filtering performance of the filter plate (9).

6. The automatic cleaning laser cutting machine according to claim 4, characterized in that: The sealing mechanism comprises a sealing airbag (15), a connecting pipe (16), a supplementary airbag (17) and a control mechanism; A sealing airbag (15) is arranged around the surface of the through groove (13); A connecting pipe (16) is connected to the sealing airbag (15); A supplementary air bag (17) is arranged inside the flue gas treatment box (4), and the supplementary air bag (17) is connected to the sealing air bag (15) through a connecting pipe (16); The control mechanism is arranged on the outside of the supplementary air bag (17) to control the pressure of the supplementary air bag (17).

7. The automatic cleaning laser cutting machine according to claim 6, characterized in that: The control mechanism includes a pressure block (18), a first spring (19) and an electromagnet (20); A pressing block (18) is arranged outside the supplementary air bag (17), and a horizontal sliding structure is formed between the pressing block (18) and the flue gas treatment box (4), and the pressing block (18) is made of a magnetic material; A first spring (19) is arranged on the outside of the pressing block (18) to provide an extruding force for the pressing block (18); The electromagnet (20) is arranged outside the pressing block (18) and attracts the pressing block (18) when energized.

8. The automatic cleaning laser cutting machine according to claim 1, characterized in that: A connecting hose (8) is connected above the cigarette head (5), the cigarette head (5) is connected to the smoke treatment box (4) via the connecting hose (8), and a swing mechanism is provided above the cigarette head (5).

9. The automatic cleaning laser cutting machine according to claim 8, characterized in that: The swing mechanism includes a rotating shaft (23) and a driving mechanism; A rotating shaft (23) is fixed above the smoking head (5), and a rotating connection is formed between the rotating shaft (23) and the smoke treatment box (4); The driving mechanism is connected to the rotating shaft (23) to control the rotation of the rotating shaft (23).

10. The automatic cleaning laser cutting machine according to claim 9, characterized in that: The driving 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), an extrusion wheel (30), a movable plate (31), a second spring (32) and a transmission gear (33); A rotating blade (24) is provided above the connecting hose (8); The mounting shaft (25) is rotatably mounted 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 mounted inside the flue gas treatment box (4), and the auxiliary shaft (26) is connected to the mounting shaft (25) via a transmission belt; A first gear (27) is fixed above the auxiliary shaft (26); a second gear (28) disposed outside the first gear (27) and meshing with the first gear (27), wherein the diameter of the second gear (28) is larger than the diameter of the first gear (27); A movable shaft (29) is fixed to the middle of the second gear (28), and a rotational connection is formed between the movable shaft (29) and the flue gas treatment box (4); An 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 staggered; A movable plate (31) is arranged outside the extrusion wheel (30), and a front-to-rear sliding structure is formed between the movable plate (31) and the flue gas treatment box (4); A second spring (32) is provided on the rear side of the movable plate (31) to provide a thrust for the movable plate (31); The transmission gear (33) is arranged on the outer side of the movable plate (31) and is meshed with the movable plate (31), and the transmission gear (33) is fixed to the upper end of the rotating shaft (23).

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