Laser cutting device for mask machining

Abstract

The invention belongs to the technical field of laser cutting, and particularly relates to a laser cutting device for mask machining, which comprises a workbench, a three-axis mechanism and a connector, and the three-axis mechanism is used for driving the connector to perform multi-axis movement; the bottom surface of the connector is fixedly connected with a laser cutting head, and the laser cutting head is used for emitting laser to cut a mask material; gas is sucked through a sucking pump, harmful gas generated in the cutting process is sucked into a hollow ring through a round hole, then the harmful gas enters a hollow groove from a first connecting pipe, and finally the harmful gas is filtered by activated carbon and discharged from a second connecting pipe, and after material cutting is completed, the power of the sucking pump can be increased, the suction force at the round hole is increased, and the cutting efficiency is improved. And at the moment, cutting waste materials on the working table can be sucked away, and the waste materials can be filtered by the filter screen and stored in the hollow groove, so that the effects that harmful gas is discharged after being purified, and meanwhile the waste materials on the machining table can be collected are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser cutting, and specifically relates to a laser cutting device for mask processing. Background Art

[0002] At present, the laser cutting devices for mask processing mainly use CO2 lasers or fiber lasers, and the laser path is controlled by a numerical control system to achieve precise cutting of materials such as non-woven fabrics and melt-blown fabrics. In the prior art, the laser cutting head is usually equipped with an automatic focusing system to adapt to different material thicknesses, and a negative pressure adsorption platform is used to fix the material to prevent displacement during cutting.

[0003] However, the above technologies often have the following defects: during the mask production process, when the laser cutting device processes high-molecular materials such as non-woven fabrics and melt-blown fabrics, due to the high-temperature effect, the materials will thermally decompose, generating volatile harmful gases. If these gases are not effectively treated, they will accumulate in the working environment, and long-term exposure may cause damage to the operators. Therefore, the present invention provides a laser cutting device for mask processing. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A laser cutting device for mask processing according to the present invention includes a workbench, a three-axis mechanism, and a connector. The three-axis mechanism is used to drive the connector to move in multiple axes; a laser cutting head is fixedly connected to the bottom surface of the connector, and the laser cutting head is used to emit laser to cut the mask material; a hollow ring sleeved on the laser cutting head is fixedly connected to the bottom surface of the connector. A group of round holes are opened on the bottom surface of the hollow ring, and a first connecting pipe is communicated with the side wall of the hollow ring. A connecting block is arranged on the side of the first connecting pipe away from the hollow ring. A hollow groove is opened in the connecting block, and the first connecting pipe is communicated with the hollow groove. A second connecting pipe is communicated in the hollow groove; a connecting frame is fixedly connected to the inner wall of the hollow groove, a filter screen is fixedly connected to the inner wall of the connecting frame, activated carbon is stored in the hollow groove, and the activated carbon is stored on the side of the filter screen away from the first connecting pipe.

[0006] Preferably, a connecting plate is fixedly connected to the inner wall of the hollow groove close to the first connecting pipe. A rotating shaft is rotatably connected to the connecting plate. A group of driving blades are fixedly connected to the surface of the rotating shaft. A first magnetic block is fixedly connected to the side of the driving blade away from the connecting plate. A group of second magnetic blocks corresponding to the first magnetic blocks are fixedly connected to the side of the filter screen away from the rotating shaft, and the first magnetic block and the second magnetic block are magnetically attracted.

[0007] Preferably, a chute is provided on the bottom surface of the inner wall of the hollow groove, a sliding plate is arranged in the chute, the activated carbon is stored above the sliding plate, and a moving component for driving the sliding plate to move is arranged in the hollow groove.

[0008] Preferably, the moving component includes a group of first springs fixedly connected to the bottom surface of the sliding plate, the other side of the first spring away from the sliding plate is fixedly connected to the inner wall of the chute, an electromagnet is fixedly connected to the bottom surface of the sliding plate, a first magnetic plate is fixedly connected to the bottom surface of the chute corresponding to the electromagnet, and the electromagnet and the first magnetic plate are magnetically attracted.

[0009] Preferably, a cavity is provided in the connecting block, a plurality of air outlet holes are provided between the cavity and the hollow groove, a communication groove is provided between the cavity and the chute, and the sliding plate is hermetically slidably connected to the inner wall of the chute.

[0010] Preferably, a discharge chute communicating with the hollow groove is provided on the bottom surface of the connecting block, the discharge chute is inclined, and a sealing component for sealing the discharge chute is arranged in the hollow groove.

[0011] Preferably, the sealing component includes a sealing plate provided in the connecting block and communicating with the discharge chute, a second spring is fixedly connected between the side of the sealing plate away from the chute and the inner wall of the moving groove, a second magnetic plate is fixedly connected to the position of the sealing plate corresponding to the electromagnet, and the second magnetic plate and the electromagnet are arranged to repel each other.

[0012] Preferably, a hollow rod is fixedly connected to the side of the filter net away from the first connecting pipe, a push rod is hermetically slidably connected to the side of the hollow rod away from the filter net, the side of the push rod away from the filter net is attached to the inner wall of the hollow groove, a plurality of moving rods are hermetically slidably connected to the side wall of the hollow rod, a third spring is fixedly connected to the ends of the moving rods close to each other, an arc-shaped block is fixedly connected to the end of the moving rod away from the third spring, and a support plate is fixedly connected to the inner wall of the hollow rod, and a fourth spring is fixedly connected between the support plate and the push rod.

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

[0014] 1. By sucking gas with an air extraction pump in the present invention, the harmful gas generated during the cutting process is inhaled into the hollow ring through the round hole, then enters the hollow groove through the first connecting pipe, and finally is filtered by the activated carbon and discharged through the second connecting pipe. After the material cutting is completed, the power of the air extraction pump can be increased to increase the suction force at the round hole. At this time, the waste materials cut on the workbench can be sucked away. The waste materials will be filtered by the filter net and stored in the hollow groove, so as to achieve the effect of purifying the harmful gas before discharging, and at the same time, the waste materials on the processing table can be collected.

[0015] 2. When the second connecting pipe of the present invention is evacuating, the gas will pass through the hollow groove. At this time, the gas will drive the driving blade to rotate, so that the first magnetic block and the second magnetic block are magnetically attracted. The filter screen is made of elastic material. At this time, the first magnetic block will push the filter screen to deform. Then when the first magnetic block moves away from the second magnetic block, the filter screen will return to its original state. By means of the intermittent magnetic attraction between the first magnetic block and the second magnetic block, the filter screen can be shaken to prevent waste from blocking the mesh holes of the filter screen and affecting the use effect of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 is a perspective view of the present invention;

[0018] Figure 2 is a front view of the present invention;

[0019] Figure 3 is a cross-sectional view of the present invention;

[0020] Figure 4 is a cross-sectional view of the present invention;

[0021] Figure 5 is a cross-sectional view of the present invention;

[0022] Figure 6 is a structural schematic diagram of the present invention;

[0023] Figure 7 is a structural schematic diagram of the present invention.

[0024] In the figure: 1, workbench; 2, connector; 3, laser cutting head; 4, hollow ring; 5, round hole; 6, first connecting pipe; 7, connecting block; 8, hollow groove; 9, second connecting pipe; 10, connecting frame; 11, filter screen; 12, connecting plate; 13, rotating shaft; 14, driving blade; 15, first magnetic block; 16, second magnetic block; 17, sliding groove; 18, sliding plate; 19, first magnetic plate; 20, electromagnet; 21, cavity; 22, air outlet hole; 23, moving groove; 24, sealing plate; 25, discharge chute; 26, second magnetic plate; 27, hollow rod; 28, push rod; 29, moving rod; 30, arc-shaped block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0026] Example 1: As Figures 1 to 5As shown in the figure, a laser cutting device for mask processing according to an embodiment of the present invention includes a workbench 1, a three-axis mechanism, and a connector 2. The three-axis mechanism is used to drive the connector 2 to move in multiple axes. A laser cutting head 3 is fixedly connected to the bottom surface of the connector 2. The laser cutting head 3 is used to emit laser to cut the mask material. A hollow ring 4 sleeved on the laser cutting head 3 is fixedly connected to the bottom surface of the connector 2. A group of round holes 5 are opened on the bottom surface of the hollow ring 4. A first connecting pipe 6 is communicated with the side wall of the hollow ring 4. A connecting block 7 is arranged on the side of the first connecting pipe 6 away from the hollow ring 4. A hollow groove 8 is opened in the connecting block 7. The first connecting pipe 6 is communicated with the hollow groove 8. A second connecting pipe 9 is communicated in the hollow groove 8. A connecting frame 10 is fixedly connected to the inner wall of the hollow groove 8. A filter screen 11 is fixedly connected to the inner wall of the connecting frame 10. Activated carbon is stored in the hollow groove 8. The activated carbon is stored on the side of the filter screen 11 away from the first connecting pipe 6.

[0027] In this application, the mask material to be cut is placed on the workbench 1, and then the three-axis mechanism is used to drive the connector 2 to move, so that the laser cutting head 3 emits laser to cut the material. During the cutting process, an air extraction pump can be externally connected to the air outlet end of the second connecting pipe 9 to let the air extraction pump suck gas. At this time, the round holes 5 will suck the harmful gas generated during the cutting process into the hollow ring 4, and then enter the hollow groove 8 from the first connecting pipe 6, and finally be filtered by the activated carbon and discharged from the second connecting pipe 9. After the material cutting is completed, the power of the air extraction pump can be increased to increase the suction force at the round holes 5. At this time, the waste materials cut on the workbench 1 can be sucked away. The waste materials will be filtered by the filter screen 11 and stored in the hollow groove 8. Through the above mechanism, the harmful gas can be purified before being discharged, and at the same time, the waste materials on the workbench can be collected.

[0028] A connecting plate 12 is fixedly connected to the inner wall of the hollow groove 8 close to the first connecting pipe 6. A rotating shaft 13 is rotatably connected to the connecting plate 12. A group of driving blades 14 are fixedly connected to the surface of the rotating shaft 13. A first magnetic block 15 is fixedly connected to the side of the driving blade 14 away from the connecting plate 12. A group of second magnetic blocks 16 corresponding to the first magnetic blocks 15 are fixedly connected to the side of the filter screen 11 away from the rotating shaft 13. The first magnetic block 15 and the second magnetic block 16 are magnetically attracted.

[0029] When the second connecting pipe 9 in this application is evacuating, the gas will pass through the hollow groove 8. At this time, the gas will drive the driving blade 14 to rotate, so that the first magnet 15 and the second magnet 16 are magnetically attracted. The filter net 11 is made of an elastic material. At this time, the first magnet 15 will push the filter net 11 to deform. Then when the first magnet 15 moves away from the second magnet 16, the filter net 11 will return to its original state. By means of the intermittent magnetic attraction of the first magnet 15 and the second magnet 16, the filter net 11 can be shaken to prevent waste from blocking the mesh holes of the filter net 11 and affecting the use effect of the filter net 11.

[0030] A sliding groove 17 is opened on the bottom surface of the inner wall of the hollow groove 8. A sliding plate 18 is arranged in the sliding groove 17. The activated carbon is stored above the sliding plate 18. A moving component for driving the sliding plate 18 to move is arranged in the hollow groove 8. In this application, when the gas passes through the activated carbon, the moving component can be used to drive the sliding plate 18 to move up and down. At this time, the activated carbon located above the sliding plate 18 will shake, making the activated carbon particles move continuously, avoiding local accumulation, enabling more activated carbon surfaces to contact the gas, and making it easier for gas molecules to enter the microporous structure of the activated carbon, thereby accelerating the adsorption rate.

[0031] The moving component includes a group of first springs fixedly connected to the bottom surface of the sliding plate 18. The side of the first spring away from the sliding plate 18 is fixedly connected to the inner wall of the sliding groove 17. An electromagnet 20 is fixedly connected to the bottom surface of the sliding plate 18. A first magnetic plate 19 is fixedly connected to the bottom surface of the sliding groove 17 corresponding to the electromagnet 20. The electromagnet 20 and the first magnetic plate 19 are magnetically attracted. In this application, by intermittently starting the electromagnet 20, the electromagnet 20 will be attracted by the first magnetic plate 19 when it is started, so that the sliding plate 18 moves downward. When the electromagnet 20 is turned off, the first spring will push the sliding plate 18 to reset. At this time, the activated carbon on the sliding plate 18 can shake.

[0032] A cavity 21 is opened in the connecting block 7. A plurality of air outlet holes 22 are opened between the cavity 21 and the hollow groove 8. A communication groove is opened between the cavity 21 and the sliding groove 17. The sliding plate 18 is in sealed sliding connection with the inner wall of the sliding groove 17. In this application, when the sliding plate 18 moves upward, it will inhale air from the air outlet holes 22. Then when the sliding plate 18 moves downward, the gas will be blown onto the activated carbon again from the air outlet holes 22, enabling the activated carbon to process this part of the gas again. After the harmful gas is processed, the air pump can be stopped, and then the electromagnet 20 is used to make the sliding plate 18 move downward again. At this time, the gas blown out from the air outlet holes 22 will act on the filter net 11 to backflush the filter net 11, thereby dredging the mesh holes of the filter net 11.

[0033] The bottom surface of the connecting block 7 is provided with a discharge chute 25 communicating with the hollow groove 8. The discharge chute 25 is inclined. A sealing assembly for sealing the discharge chute 25 is arranged in the hollow groove 8. In this application, the impurities filtered by the filter net 11 can fall into the discharge chute 25. Then, when there are more impurities, the discharge chute 25 can be unsealed by the sealing assembly. At this time, the impurities can be discharged from the discharge chute 25.

[0034] The sealing assembly includes a sealing plate 24 arranged in the connecting block 7 and communicating with the discharge chute 25. A second spring is fixedly connected between the side of the sealing plate 24 away from the sliding chute 17 and the inner wall of the moving groove 23. A second magnetic plate 26 is fixedly connected to the position of the sealing plate 24 corresponding to the electromagnet 20. The second magnetic plate 26 is arranged to repel the electromagnet 20. When the activated carbon in this application vibrates and the electromagnet 20 attracts the sliding plate 18 to move, the height of the electromagnet 20 is higher than that of the second magnetic plate 26. When the sealing plate 24 needs to be opened, the magnetic force of the electromagnet 20 can be increased, so that the first magnetic plate 19 attracts the electromagnet 20 to move to the position of the second magnetic plate 26. At this time, the second magnetic plate 26 will be pushed, so that the second magnetic plate 26 drives the sealing plate 24 to open, so that the waste can be discharged from the discharge chute 25.

[0035] Embodiment 2: As Figures 6 to 7 shown, compared with Embodiment 1, another implementation manner of the present invention is: A hollow rod 27 is fixedly connected to the side of the filter net 11 away from the first connecting pipe 6. The side of the hollow rod 27 away from the filter net 11 is hermetically slidably connected with a push rod 28. The side of the push rod 28 away from the filter net 11 is attached to the inner wall of the hollow groove 8. A plurality of moving rods 29 are hermetically slidably connected to the side wall of the hollow rod 27. The ends of the moving rods 29 close to each other are fixedly connected with a third spring. The ends of the moving rods 29 away from the third spring are fixedly connected with an arc-shaped block 30. A support plate is fixedly connected to the inner wall of the hollow rod 27. A fourth spring is fixedly connected between the support plate and the push rod 28. During the shaking process of the filter net 11 in this application, the hollow rod 27 will be pulled. When the filter net 11 is restored, the hollow rod 27 will also be reset. At this time, the push rod 28 will push the gas in the hollow rod 27, thereby pushing the moving rod 29, so that the arc-shaped block 30 pushes the activated carbon, thereby assisting the further flow of the activated carbon to improve the adsorption effect of the activated carbon.

[0036] Working principle: Place the mask material to be cut on the workbench 1, and then drive the connector 2 to move by means of a three-axis mechanism, so that the laser cutting head 3 emits laser to cut the material. During the cutting process, an air extraction pump can be externally connected to the air outlet end of the second connecting pipe 9 to allow the air extraction pump to suck gas. At this time, the round hole 5 will suck the harmful gas generated during the cutting process into the hollow ring 4, then enter the hollow groove 8 through the first connecting pipe 6, and finally be discharged from the second connecting pipe 9 after being filtered by activated carbon. After the material cutting is completed, the power of the air extraction pump can be increased to increase the suction force at the round hole 5. At this time, the waste materials cut on the workbench 1 can be sucked away. The waste materials will be filtered by the filter net 11 and stored in the hollow groove 8. Through the above mechanism, the harmful gas can be purified and then discharged. At the same time, the waste materials on the processing table can be collected. When the second connecting pipe 9 in this application extracts air, the gas will pass through the hollow groove 8, and the suction force will cause a certain deformation of the filter net 11. At this time, the gas will drive the driving blade 14 to rotate, so that the first magnetic block 15 and the second magnetic block 16 are magnetically attracted. The filter net 11 is made of an elastic material. At this time, the first magnetic block 15 will push the filter net 11 to produce further deformation. Then when the first magnetic block 15 moves away from the second magnetic block 16, the filter net 11 will return to its original state. By means of the intermittent magnetic attraction of the first magnetic block 15 and the second magnetic block 16, the filter net 11 can be shaken to prevent waste materials from blocking the mesh holes of the filter net 11 and affecting the use effect of the filter net 11;

[0037] In this application, when the gas passes through the activated carbon, the moving component can be used to drive the slide plate 18 to move up and down. At this time, the activated carbon above the slide plate 18 will shake, making the activated carbon particles move continuously, avoiding local accumulation, enabling more activated carbon surfaces to contact the gas, and making it easier for gas molecules to enter the microporous structure of the activated carbon, thus accelerating the adsorption rate. In this application, the electromagnet 20 is started intermittently. When the electromagnet 20 is started, it will be attracted by the first magnetic plate 19, so that the slide plate 18 moves downward. When the electromagnet 20 is turned off, the first spring will push the slide plate 18 to reset. At this time, the activated carbon on the slide plate 18 can shake. When the slide plate 18 moves upward in this application, it will inhale air from the air outlet hole 22. Then when the slide plate 18 moves downward, the gas will be blown onto the activated carbon again from the air outlet hole 22, allowing the activated carbon to process this part of the gas again. After the harmful gas is processed, the air pump can be stopped, and then the slide plate 18 can be moved downward again by means of the electromagnet 20. At this time, the gas blown out from the air outlet hole 22 will act on the filter net 11 to backwash the filter net 11, so as to dredge the mesh holes of the filter net 11;

[0038] In this application, the impurities filtered by the filter screen 11 can fall into the discharge chute 25. Then, when there are more impurities, the discharge chute 25 can be made not sealed by the sealing assembly. At this time, the impurities can be discharged from the discharge chute 25. When the activated carbon in this application shakes and the electromagnet 20 attracts the sliding plate 18 to move, the height of the electromagnet 20 is higher than that of the second magnetic plate 26. When it is necessary to open the sealing plate 24, the magnetic force of the electromagnet 20 can be increased, so that the first magnetic plate 19 attracts the electromagnet 20 to move to the second magnetic plate 26. At this time, the second magnetic plate 26 will be pushed, so that the second magnetic plate 26 drives the sealing plate 24 to open, so that the waste can be discharged from the discharge chute 25.

[0039] The above front, back, left, right, up, and down are all based on the Figure 1 description in the accompanying drawings of the specification. Taking the perspective of the person observing as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present invention.

[0041] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser cutting device for mask processing, comprising a workbench (1), a three-axis mechanism and a connector (2), wherein the three-axis mechanism is used to drive the connector (2) to perform multi-axis movement; Features: A laser cutting head (3) is fixedly connected to the bottom surface of the connector (2), and the laser cutting head (3) is used to emit laser to cut the mask material; The bottom surface of the connector (2) is fixedly connected to a hollow ring (4) sleeved on the laser cutting head (3); a group of circular holes (5) are provided on the bottom surface of the hollow ring (4); a first connecting pipe (6) is connected to the side wall of the hollow ring (4); a connecting block (7) is provided on the side of the first connecting pipe (6) away from the hollow ring (4); a hollow groove (8) is provided in the connecting block (7); the first connecting pipe (6) is connected to the hollow groove (8); and a second connecting pipe (9) is connected in the hollow groove (8); The inner wall of the hollow groove (8) is fixedly connected to a connection frame (10), the inner wall of the connection frame (10) is fixedly connected to a filter screen (11), activated carbon is stored in the hollow groove (8), and the activated carbon is stored on a side of the filter screen (11) away from the first connection pipe (6).

2. A laser cutting device for mask processing according to claim 1, characterized in that: A connecting plate (12) is fixedly connected to the inner wall of the hollow groove (8) close to the first connecting tube (6); a rotating shaft (13) is rotatably connected to the connecting plate (12); a group of driving blades (14) are fixedly connected to the surface of the rotating shaft (13); a first magnetic block (15) is fixedly connected to the side of the driving blade (14) away from the connecting plate (12); a group of second magnetic blocks (16) corresponding to the first magnetic blocks (15) are fixedly connected to the side of the filter screen (11) away from the rotating shaft (13); and the first magnetic blocks (15) and the second magnetic blocks (16) are magnetically attracted to each other.

3. A laser cutting device for mask processing according to claim 2, characterized in that: The inner wall bottom surface of the hollow groove (8) is provided with a slide groove (17), a slide plate (18) is arranged in the slide groove (17), the activated carbon is stored above the slide plate (18), and a moving component for driving the slide plate (18) to move is arranged in the hollow groove (8).

4. A laser cutting device for mask processing according to claim 3, characterized in that: The moving assembly comprises a group of first springs fixedly connected to the bottom surface of the slide plate (18); the first springs are fixedly connected to the inner wall of the slide groove (17) on a side away from the slide plate (18); the bottom surface of the slide plate (18) is fixedly connected to an electromagnet (20); the bottom surface of the slide groove (17) corresponding to the electromagnet (20) is fixedly connected to a first magnetic plate (19); the electromagnet (20) and the first magnetic plate (19) are magnetically attracted to each other.

5. A laser cutting device for mask processing according to claim 4, characterized in that: A cavity (21) is provided in the connection block (7), a plurality of groups of air outlet holes (22) are provided between the cavity (21) and the hollow groove (8), a connecting groove is provided between the cavity (21) and the slide groove (17), and the slide plate (18) is sealingly and slidably connected to the inner wall of the slide groove (17).

6. A laser cutting device for mask processing according to claim 4, characterized in that: The bottom surface of the connection block (7) is provided with a discharge groove (25) connected to the hollow groove (8); the discharge groove (25) is arranged obliquely; and a sealing component for sealing the discharge groove (25) is arranged in the hollow groove (8).

7. A laser cutting device for mask processing according to claim 6, characterized in that: The sealing assembly comprises a sealing plate (24) which is opened in the connecting block (7) and communicates with the discharge groove (25); a second spring is fixedly connected between the side of the sealing plate (24) away from the slide groove (17) and the inner wall of the movable groove (23); a second magnetic plate (26) is fixedly connected to the position of the sealing plate (24) corresponding to the electromagnet (20); and the second magnetic plate (26) and the electromagnet (20) are arranged to repel each other.

8. A laser cutting device for mask processing according to claim 2, characterized in that: The side of the filter (11) away from the first connecting tube (6) is fixedly connected to a hollow rod (27), the side of the hollow rod (27) away from the filter (11) is sealingly slidably connected to a push rod (28), the side of the push rod (28) away from the filter (11) is in contact with the inner wall of the hollow groove (8), the side wall of the hollow rod (27) is sealingly slidably connected to multiple groups of moving rods (29), the ends of the moving rods (29) close to each other are fixedly connected to a third spring, the end of the moving rod (29) away from the third spring is fixedly connected to an arc block (30), the inner wall of the hollow rod (27) is fixedly connected to a support plate, and a fourth spring is fixedly connected between the support plate and the push rod (28).

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