A laser cutting machine for sound barrier processing

Abstract

This invention provides a laser cutting machine for sound barrier processing, relating to the field of laser processing equipment technology. It includes a worktable with a cutting machine mounted on its upper surface, and a laser head connected to the cutting machine. It also includes a dust extraction mechanism, comprising a mounting sleeve fixedly fitted onto the outer wall of the laser head. A hydraulic cylinder is connected to the side wall of the mounting sleeve. Two sets of mounting rings are provided on the side walls of the mounting sleeve. A connecting tube is slidably connected within each set of mounting rings. A magnetic ball is rotatably connected to the bottom of the connecting tube, and the magnetic ball abuts against the upper surface of the worktable. A sliding sleeve is slidably connected within the connecting tube. A straight rod is fixedly connected to the center of the sliding sleeve. A swing rod is hinged to the lower end of the straight rod, and a magnetic chuck is hinged to the other end of the swing rod. The magnetic chuck and the magnetic ball attract each other with opposite poles. This cutting machine, through its dust extraction mechanism, achieves efficient coordination between cutting operations and dust collection.

Description

Technical Field

[0001] This invention relates to the field of laser processing equipment technology, and more specifically, to a laser cutting machine for processing sound barriers. Background Technology

[0002] During laser cutting, a high-energy-density laser beam irradiates the surface of a metal material, instantly generating extremely high local temperatures. This causes the material to melt, vaporize, or even burn rapidly. This complex physicochemical reaction process generates a large amount of particulate matter, metal vapor, and harmful gases. Specifically, when the laser beam interacts with commonly used materials in sound barriers, such as aluminum alloy sheets, galvanized steel sheets, and stainless steel, the surface metal melts and evaporates at an instantaneous high temperature, forming a smoky suspension containing metal oxides and metal particles. These dust particles typically range in diameter from a few micrometers to tens of micrometers and possess extremely strong floating and diffusion capabilities. Simultaneously, the auxiliary gases produced during the cutting process... High-pressure jetting spreads molten metal splashes, cutting slag, and fumes into the surrounding space, creating a diffuse pollution area. This is especially true in the batch processing of sound barrier panels, where the cutting process is continuous and takes a long time, resulting in a huge accumulation of fumes. Without effective collection and treatment measures, these fumes will spread and adhere to equipment surfaces, walls, and ceilings, not only polluting the cleanliness of the production environment and reducing the overall image and comfort of the workshop, but also causing pollution and corrosion to the optical system, transmission mechanism, and other precision components of the laser cutting equipment itself. This affects the processing accuracy and service life of the equipment, increasing maintenance costs and failure rates.

[0003] Meanwhile, the fumes generated by laser cutting pose a direct threat to the health of operators. Metal cutting fumes contain a variety of harmful components, including heavy metal oxide particles, carbon monoxide, nitrogen oxides, and other toxic and harmful substances. Among them, alumina dust from aluminum alloy cutting, zinc vapor released from galvanized sheet cutting, and chromium-nickel compounds formed from stainless steel cutting all have significant health hazards. Workers exposed to this fumes for a long time will suffer damage to their respiratory system. In addition, the fumes will irritate the eyes and skin of workers, reducing the level of labor protection and occupational health protection for workers. Existing laser cutting equipment is generally only equipped with simple exhaust devices, with limited dust removal effect, and the above problems still exist. Summary of the Invention

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, the present invention provides a laser cutting machine for processing sound barriers to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A laser cutting machine for processing sound barriers includes a worktable with a cutting machine mounted on its upper surface and a laser head connected to the cutting machine. It also includes a dust extraction mechanism, which includes a mounting sleeve fixedly fitted onto the outer wall of the laser head. A hydraulic cylinder is connected to the side wall of the mounting sleeve. Two sets of mounting rings are provided on both side walls of the mounting sleeve. A connecting tube is slidably connected within each set of mounting rings. A magnetic ball is rotatably connected to the bottom of the connecting tube, and the magnetic ball abuts against the upper surface of the worktable. A sliding sleeve is slidably connected within the connecting tube. A straight rod is fixedly connected to the center of the sliding sleeve. A swing rod is hinged to the lower end of the straight rod, and a magnetic chuck is hinged to the other end of the swing rod. The magnetic chuck and the magnetic ball attract each other with opposite poles.

[0006] Preferably, a fumigation hood is connected between the two sets of connecting pipes, an inner ring is connected to the inside of the fumigation hood, and a fumigation chamber is formed between the fumigation hood and the inner ring.

[0007] Preferably, the outer wall of the smoking hood is connected to a mounting plate, the telescopic end of the hydraulic cylinder is fixedly connected to the upper surface of the mounting plate, the inner ring surface is provided with multiple sets of openings, a connecting groove is provided between the smoking hood and the connecting pipes on both sides, and the connecting pipes are connected to the smoking chamber through the connecting groove.

[0008] Preferably, the upper end face of the connecting pipe is connected to a fixing pipe, the bottom of the inner side wall of the fixing pipe is provided with a sealing ring, and the outer side wall of the fixing pipe is connected to a smoking pipe.

[0009] Preferably, the fixed tube is internally threaded with a threaded tube, and a hexagonal ring is fixedly sleeved on the outer wall of the threaded tube.

[0010] Preferably, a fixing ring is fixedly sleeved on the outer wall of the threaded tube, and a compression spring is sleeved on the outer wall of the threaded tube. One end of the compression spring is fixedly connected to the lower end face of the fixing ring, and the other end is connected to a rotating ring. The rotating ring is slidably connected to the outer wall of the threaded tube and slidably abuts against the upper end face of the fixing tube.

[0011] Preferably, a pull rod is slidably connected at the center position inside the threaded tube, and two sets of limiting nuts are threadedly connected to one end of the pull rod.

[0012] Preferably, the other end of the pull rod is connected to a sealing disc, which works in conjunction with a sealing ring. A fixing groove is provided on the lower end face of the sealing disc, and the upper end of the straight rod is inserted into the fixing groove and fixedly connected to the sealing disc.

[0013] Preferably, the lower end face of the threaded tube is connected to a sliding tube, and an intermediate ring is sleeved on the outer wall of the pull rod, the intermediate ring being slidably connected to the inner wall of the sliding tube.

[0014] Preferably, the outer wall of the pull rod is fitted with a first spring and a second spring, which are located inside the slide tube. One end of the first spring is fixedly connected to the upper end face of the intermediate ring, and the other end is rotatably connected to the top end of the inner wall of the slide tube. One end of the second spring is fixedly connected to the lower end face of the intermediate ring, and the other end is rotatably connected to the bottom end of the inner wall of the slide tube.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a laser cutting machine for sound barrier processing, which has the following beneficial effects: This laser cutting machine for sound barrier processing solves the problem of smoke and dust pollution during laser cutting by means of a smoke extraction mechanism, and realizes efficient coordination between cutting operation and smoke and dust collection. The device adopts a magnetic ball and magnetic chuck with opposite pole magnetic attraction, which enables the smoke extraction mechanism to closely follow the movement trajectory of the laser head and move synchronously, ensuring that the smoke hood always covers the cutting area and captures the smoke and dust as close as possible to the source of smoke and dust generation. The rolling contact of the magnetic ball on the worktable surface not only ensures the flexibility of following, but also drives the magnetic chuck to generate relative motion through its own rotation, converting the horizontal movement of the laser head into a mechanical linkage signal to trigger the opening of the sealing mechanism.

[0016] The annular smoke chamber structure formed by the smoke hood and the inner ring, along with multiple sets of openings evenly distributed on the surface of the inner ring, can create a stable negative pressure adsorption area around the cutting point. Smoke and dust are introduced into the smoke chamber through the openings, then flow into the connecting pipe through the connecting grooves on both sides, and finally discharged through the smoke pipe, ensuring high efficiency in smoke and dust collection. When the magnetic chuck moves with the magnetic ball, the swinging motion of the swing rod directly pulls the straight rod down, thereby releasing the sealing plate from the sealing ring and opening the smoke and dust intake channel. As long as the laser head is in the moving cutting state, the continuous rotation of the magnetic ball will maintain the open state of the sealing plate, ensuring the continuity and reliability of the smoke and dust absorption work. Even when the magnetic chuck is blocked at the edge of the inner wall of the connecting pipe and cannot continue to move, it can still maintain the pulling effect on the swing rod through the relative sliding with the magnetic ball, so that the sealed channel always remains open.

[0017] The coordinated work of the first and second springs provides a stable elastic restoring force and buffer protection for the entire linkage system. When the sealing disc is pulled down, the first spring stretches and stores energy, while the second spring compresses and stores energy. The combined effect of both ensures that the pull rod can quickly return to its original position after the external force is removed, ensuring that the sealing disc re-engages tightly with the sealing ring. The threaded connection between the threaded tube and the fixed tube, along with the tool operation interface of the hexagonal ring, allows the operator to easily adjust the initial position of the slide tube and the second spring according to actual needs. When the threaded tube drives the slide tube upward, the second spring applies a greater upward thrust to the pull rod through the intermediate ring, enhancing the sealing pressure between the sealing disc and the sealing ring and improving the sealing reliability in non-working conditions.

[0018] The hydraulic cylinder drive control enables the overall lifting and lowering adjustment of the smoke extraction mechanism. When the laser head stops working, the hydraulic cylinder drives the smoke extraction hood and connecting pipe to move upward, causing the magnetic ball to detach from the worktable surface. At this time, the spring's reset action causes the sealing disc and sealing ring to seal and abut, cutting off the smoke extraction channel and avoiding unnecessary airflow suction and energy waste. Simultaneously, the swing rod and magnetic chuck also return to their vertical alignment under the action of the spring, preparing for the next operation. This linkage mechanism that switches according to the working state not only simplifies the operation process and reduces the labor intensity of the staff, but also improves the working efficiency of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a laser cutting machine for processing sound barriers according to the present invention; Figure 2 This is a schematic diagram of the workbench and cutting machine in this invention; Figure 3 This is a schematic diagram of the smoke extraction mechanism in this invention; Figure 4 This is a schematic diagram of the connecting pipe and the fumigation hood in this invention; Figure 5 In this invention Figure 4 A schematic diagram of the cross-sectional structure; Figure 6 This is a cross-sectional view of the connecting tube and the magnetic ball in this invention; Figure 7 This is a cross-sectional view of the smoking tube and connecting tube in this invention; Figure 8 This is a cross-sectional view of the threaded tube and tie rod in this invention.

[0020] In the diagram: 11. Workbench; 12. Cutting machine; 13. Laser head; 21. Mounting sleeve; 22. Hydraulic cylinder; 23. Mounting ring; 24. Connecting pipe; 25. Magnetic ball; 26. Sliding sleeve; 27. Straight rod; 28. Swinging rod; 29. ​​Magnetic chuck; 210. Fume hood; 211. Inner ring; 212. Fume chamber; 213. Mounting plate; 214. Opening; 215. Connecting groove; 216. Fixing pipe; 217. Sealing ring; 218. Fume pipe; 219. Threaded pipe; 220. Hexagonal ring; 221. Fixing ring; 222. Compression spring; 223. Rotary ring; 224. Pull rod; 225. Limiting nut; 226. Sealing disc; 227. Fixing groove; 228. Sliding tube; 229. Intermediate ring; 230. First spring; 231. Second spring. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0024] Please see Figures 1-8A laser cutting machine for processing sound barriers includes a worktable 11, a cutting machine 12 mounted on the upper surface of the worktable 11, and a laser head 13 connected to the cutting machine 12; it also includes a dust extraction mechanism, which includes a mounting sleeve 21 fixedly mounted on the outer wall of the laser head 13. A hydraulic cylinder 22 is connected to the side wall of the mounting sleeve 21. Two sets of mounting rings 23 are provided on the two side walls of the mounting sleeve 21. A connecting pipe 24 is slidably connected inside each set of mounting rings 23. A magnetic ball 25 is rotatably connected to the bottom of the connecting pipe 24. The magnetic ball 25 abuts against the upper surface of the worktable 11. A sliding sleeve 26 is slidably connected inside the connecting pipe 24. A straight rod 27 is fixedly connected to the center of the sliding sleeve 26. A swing rod 28 is hinged to the lower end of the straight rod 27. The swing rod 28 is further... A magnetic chuck 29 is hinged to one end, and the magnetic chuck 29 and the magnetic ball 25 attract each other with opposite poles. A fumigation hood 210 is connected between two sets of connecting pipes 24. An inner ring 211 is connected to the inner side of the fumigation hood 210, and a fumigation chamber 212 is formed between the fumigation hood 210 and the inner ring 211. A mounting plate 213 is connected to the outer wall of the fumigation hood 210. The telescopic end of the hydraulic cylinder 22 is fixedly connected to the upper end face of the mounting plate 213. Multiple sets of openings 214 are formed on the surface of the inner ring 211. A connecting groove 215 is formed between the fumigation hood 210 and the two connecting pipes 24. The connecting pipes 24 and the fumigation chamber 212 are connected through the connecting groove 215. A fixing pipe 216 is connected to the upper end face of the connecting pipe 24. A sealing ring 217 is provided at the bottom of the inner wall of the fixing pipe 216. A smoking pipe 218 is connected to the outer wall of the fixed pipe 216. A threaded pipe 219 is threadedly connected to the inner wall of the fixed pipe 216. A hexagonal ring 220 is fixedly fitted on the outer wall of the threaded pipe 219. A fixing ring 221 is fixedly fitted on the outer wall of the threaded pipe 219. A compression spring 222 is fitted on the outer wall of the threaded pipe 219. One end of the compression spring 222 is fixedly connected to the lower end face of the fixing ring 221, and the other end is connected to a rotating ring 223. The rotating ring 223 is slidably connected to the outer wall of the threaded pipe 219 and slidably abuts against the upper end face of the fixed pipe 216. A pull rod 224 is slidably connected to the center position inside the threaded pipe 219. Two sets of limit nuts 225 are threadedly connected to one end of the pull rod 224. The other end of the pull rod 224 is connected to a sealing disc 226. The sealing disc 226 and the sealing ring 220 are connected to the sealing ring 221. 17. When used together, the lower end face of the sealing disc 226 is provided with a fixing groove 227. The upper end of the straight rod 27 is inserted into the fixing groove 227 and fixedly connected to the sealing disc 226. The lower end face of the threaded tube 219 is connected to the slide tube 228. The outer wall of the pull rod 224 is fitted with an intermediate plate. The intermediate ring 229 is slidably connected to the inner wall of the slide tube 228. The outer wall of the pull rod 224 is fitted with a first spring 230 and a second spring 231. The first spring 230 and the second spring 231 are located inside the slide tube 228. One end of the first spring 230 is fixedly connected to the upper end face of the intermediate ring 229, and the other end is rotatably connected to the top end of the inner wall of the slide tube 228. One end of the second spring 231 is fixedly connected to the lower end face of the intermediate ring 229, and the other end is rotatably connected to the bottom end of the inner wall of the slide tube 228.

[0025] In this invention, after the worker places the material to be cut on the workbench 11, the cutting machine 12 is started. The cutting machine 12 drives the laser head 13 to cut the material. The smoke extraction mechanism can effectively remove the smoke generated during the cutting process of the laser head 13. Two sets of smoke extraction pipes 218 are connected to external smoke extraction devices. When the laser head 13 is not working, the extension end of the hydraulic cylinder 22 will drive the smoke extraction hood 210 and the connecting pipes 24 on both sides to move upward along the mounting ring 23. At this time, the magnetic ball 25 is not in contact with the workbench 11. When the laser head 13 is working, the extension plate of the hydraulic cylinder 22 will drive the smoke extraction hood 210 and the connecting pipes 24 on both sides to move downward along the mounting ring 23, so that the magnetic ball 25 rotates and abuts against the surface of the workbench 11. The magnetic ball 25 will move along the workbench 11 as the laser head 13 moves. Figure 5 As shown, the left and right connecting tubes 24 are in two working states. The left connecting tube 24 is in the working state, the sealing ring 217 and the sealing plate 226 are in the unlocked state, and the swing rod 28 is in the swinging state as the magnetic ball 25 moves. The right connecting tube 24 is in the non-working state, the sealing ring 217 and the sealing plate 226 are in the sealed contact state, and the swing rod 28 is in the vertical state. Specifically, when the laser head 13 is working, it drives the dust extraction mechanism connected to it to move synchronously. The magnetic ball 25 rotates and moves along the worktable 11. When the magnetic ball 25 rotates, it drives the magnetic chuck 29 attached to its surface to rotate synchronously. Figure 5As shown inside the left connecting tube 24, the movement of the magnetic chuck 29 will cause the swing rod 28, which is hinged to it, to swing. The other end of the swing rod 28 rotates inside the straight rod 27. The swing of the swing rod 28 will pull the sliding sleeve 26 down along the connecting tube 24. The sliding sleeve 26 will drive the straight rod 27 down synchronously. The other end of the straight rod 27 will then pull the sealing disc 226 and the pull rod 224 down, causing the sealing disc 226 to release from the sealing contact with the sealing ring 217. The pull rod 224 will slide down along the threaded tube 219 and the sliding tube 228. At this time, the first spring 230 is stretched and the second spring 231 is compressed. Therefore, as the magnetic chuck 29 moves with the magnetic ball 25, the smoke generated by the laser head 13 during cutting is drawn into the smoking chamber 212 through the opening 214, and then into the connecting pipe 24 through the connecting grooves 215 on both sides. It then enters the fixed pipe 216 through the gap between the sealing ring 217 and the sealing plate 226, and is finally drawn out through the smoking pipe 218. This achieves the absorption of smoke during cutting. When the magnetic ball 25 moves the magnetic chuck... When the magnetic chuck 29 moves to the edge of the inner wall of the connecting tube 24, it is blocked and can no longer move with the magnetic ball 25. At this time, the magnetic chuck 29 and the magnetic ball 25 will slide relative to each other against friction. However, the magnetic chuck 29 always pulls the straight rod 27 through the swing rod 28 to release the sealing plate 226 from the sealing ring 217. That is to say, as long as the laser head 13 is in the process of moving and cutting, the rotation of the magnetic ball 25 will drive the sealing plate 226 to release the sealing ring 217 from the sealing. The smoke extraction mechanism is used for dust extraction. After the cutting work is completed, the hydraulic cylinder 22 drives the smoke extraction mechanism to move upward, so that the magnetic ball 25 no longer contacts the worktable 11. At this time, the first spring 230 and the second spring 231 rebound and drive the pull rod 224 to reset. The pull rod 224 drives the sealing plate 226 to move upward and make sealing contact with the sealing ring 217 again. The sealing plate 226 drives the sliding sleeve 26 to move upward through the straight rod 27, and at the same time drives the swing rod 28 to be aligned. The swing rod 28 drives the magnetic chuck 29 and the magnetic ball 25 to be aligned. The limiting nut 225 limits the downward movement of the pull rod 224. When the limiting nut 225 abuts against the upper end face of the threaded tube 219, the pull rod 224 will not continue to move downward. The operator can rotate the hexagonal ring 220 with an external tool. The hexagonal ring 220 drives the threaded tube 219 to rotate and move up or down along the fixed cylinder. The threaded tube 219 drives the fixed ring 221 and the compression spring 222 to rotate. The compression spring 222 drives the rotating ring 223 to rotate synchronously. The movement of the threaded tube 219 will drive the slide tube 228 to move synchronously. When the threaded tube 219 drives the slide tube 228 to move upward, the second spring 231 inside the slide tube 228 moves upward synchronously. However, the sealing disc 226 and the sealing ring 217 are in a sealed abutment state, and the pull rod 224 cannot move upward anymore. Therefore, the second spring 231 will provide a greater upward thrust to the pull rod 224 through the intermediate ring 229, so as to improve the sealing effect.

[0026] In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. They will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be elaborated upon in this invention. Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, so their electrical connection relationships and specific circuit structures will not be elaborated here.

Claims

1. A laser cutting machine for processing sound barriers, comprising a worktable (11), characterized in that: The upper surface of the workbench (11) is provided with a cutting machine (12), and a laser head (13) is connected to the cutting machine (12); it also includes a dust extraction mechanism, which includes a mounting sleeve (21), which is fixedly fitted on the outer wall of the laser head (13). A hydraulic cylinder (22) is connected to the side wall of the mounting sleeve (21), and two sets of mounting rings (23) are provided on the two side walls of the mounting sleeve (21). A connecting pipe (24) is slidably connected in each set of mounting rings (23). A magnetic ball (25) is rotatably connected to the bottom of the connecting tube (24). The magnetic ball (25) abuts against the upper surface of the workbench (11). A sliding sleeve (26) is slidably connected inside the connecting tube (24). A straight rod (27) is fixedly connected to the center of the sliding sleeve (26). A swing rod (28) is hinged to the lower end of the straight rod (27). A magnetic chuck (29) is hinged to the other end of the swing rod (28). The magnetic chuck (29) and the magnetic ball (25) are attracted to each other by opposite poles.

2. The laser cutting machine for processing sound barriers according to claim 1, characterized in that: A smoking hood (210) is connected between the two sets of connecting pipes (24). An inner ring (211) is connected to the inside of the smoking hood (210). A smoking chamber (212) is formed between the smoking hood (210) and the inner ring (211).

3. The laser cutting machine for processing sound barriers according to claim 2, characterized in that: The outer wall of the smoking hood (210) is connected to an installation plate (213). The telescopic end of the hydraulic cylinder (22) is fixedly connected to the upper end face of the installation plate (213). Multiple sets of openings (214) are opened on the surface of the inner ring (211). A connecting groove (215) is provided between the smoking hood (210) and the connecting pipes (24) on both sides. The connecting pipes (24) are connected to the smoking chamber (212) through the connecting groove (215).

4. A laser cutting machine for processing sound barriers according to claim 3, characterized in that: The upper end face of the connecting pipe (24) is connected to a fixing pipe (216), the bottom of the inner side wall of the fixing pipe (216) is provided with a sealing ring (217), and the outer side wall of the fixing pipe (216) is connected to a smoking pipe (218).

5. A laser cutting machine for processing sound barriers according to claim 4, characterized in that: The fixed tube (216) is internally threaded to a threaded tube (219), and a hexagonal ring (220) is fixedly sleeved on the outer wall of the threaded tube (219).

6. A laser cutting machine for processing sound barriers according to claim 5, characterized in that: A fixing ring (221) is fixedly sleeved on the outer wall of the threaded tube (219), and a compression spring (222) is sleeved on the outer wall of the threaded tube (219). One end of the compression spring (222) is fixedly connected to the lower end face of the fixing ring (221), and the other end is connected to a rotating ring (223). The rotating ring (223) is slidably connected to the outer wall of the threaded tube (219), and the rotating ring (223) slidably abuts against the upper end face of the fixing tube (216).

7. A laser cutting machine for processing sound barriers according to claim 6, characterized in that: A pull rod (224) is slidably connected to the center of the threaded tube (219), and two sets of limit nuts (225) are threaded to one end of the pull rod (224).

8. A laser cutting machine for processing sound barriers according to claim 7, characterized in that: The other end of the pull rod (224) is connected to a sealing disc (226). The sealing disc (226) is used in conjunction with the sealing ring (217). A fixing groove (227) is provided on the lower end face of the sealing disc (226). The upper end of the straight rod (27) is inserted into the fixing groove (227) and fixedly connected to the sealing disc (226).

9. A laser cutting machine for processing sound barriers according to claim 8, characterized in that: The lower end face of the threaded tube (219) is connected to the slide tube (228), and the outer wall of the pull rod (224) is fitted with an intermediate ring (229), which is slidably connected to the inner wall of the slide tube (228).

10. A laser cutting machine for processing sound barriers according to claim 9, characterized in that: The outer wall of the pull rod (224) is fitted with a first spring (230) and a second spring (231). The first spring (230) and the second spring (231) are located inside the slide tube (228). One end of the first spring (230) is fixedly connected to the upper end face of the intermediate ring (229), and the other end is rotatably connected to the top end of the inner wall of the slide tube (228). One end of the second spring (231) is fixedly connected to the lower end face of the intermediate ring (229), and the other end is rotatably connected to the bottom end of the inner wall of the slide tube (228).

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