High-frequency welded pipe laser cutting device and method

Abstract

The invention discloses a high-frequency welded pipe laser cutting device and method, and belongs to the field of high-frequency welded pipe machining, the high-frequency welded pipe laser cutting device comprises a supporting part, a hollow pneumoelectric slip ring connected to the interior of the supporting part and a cutting assembly connected to one side of the hollow pneumoelectric slip ring, and the cutting assembly comprises an axial displacement part fixedly connected to one side of the hollow pneumoelectric slip ring; the lens is isolated from airflow in the nozzle through the high-transmittance glass, zinc steam and oxide particles are prevented from adhering to the lens, the air ring is arranged in the nozzle, the air outlet of the air ring faces the exhaust port of the nozzle, and the air outlet and the air gathering cover are designed in an air gathering mode. Auxiliary gas entering the air ring is exhausted from the air outlet and guided by the air gathering cover, the auxiliary gas guided by the air gathering cover is gathered downwards in the nozzle to form a dynamic gas curtain, a zinc steam backflow path from a lower cutting area is blocked, and zinc steam and oxide particles are effectively prevented from being attached to high-transmittance glass.

Description

Technical Field

[0001] The present invention relates to the field of high-frequency welded pipe processing, and more specifically, to a high-frequency welded pipe laser cutting device and method. Background Art

[0002] High-frequency welded pipe is a seamless and continuously formed steel pipe that uses high-frequency current to perform electromagnetic induction heating at the bent edge of a steel strip or steel plate, causing the metal at the contact surface to quickly melt, and then completing the extrusion, welding, forming, and cooling of the gap under the action of high-pressure rollers.

[0003] Currently, in the production of high-frequency welded pipes, laser cutting is usually used for cutting high-frequency welded pipes. For example, the prior art (a Chinese utility model patent with the publication number CN218836482U) discloses a high-frequency welded pipe laser cutting machine, which uses a laser cutting machine to perform laser cutting on a fixed high-frequency welded pipe; although the laser cutting method has advantages such as fast cutting speed, high production efficiency, extremely narrow cut seams, and high cut quality compared to traditional sawing, when using the laser cutting method to cut galvanized high-frequency welded pipes, the temperature of the focused light spot can instantaneously exceed 2000 °C, far exceeding the boiling point of zinc, resulting in the galvanized layer first melting and quickly vaporizing into zinc vapor. The evaporated metallic zinc quickly oxidizes when encountering air, forming fine zinc oxide (ZnO) particles or soot. Although the nozzle sprays a protective gas into the cut seam area, when cutting galvanized high-frequency welded pipes, a high-speed jet is formed between the nozzle aperture inside the laser cutting nozzle and the external environment. According to Bernoulli's principle, a local low pressure will be generated near the nozzle outlet. This "jet suction" will suck some of the zinc vapor generated at high temperature in the cutting area towards the nozzle root, passing through the gap between the nozzle and the protective window and entering the optical path protection area, which will cause zinc vapor and oxide particles to adhere to the optical element (laser cutting lens), resulting in attenuation of the laser power, deterioration of the cutting quality, and increased maintenance frequency. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a high-frequency welded pipe laser cutting device and method.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A high-frequency welded pipe laser cutting device includes a support part, a hollow air-electric slip ring connected inside the support part, and a cutting assembly connected to one side of the hollow air-electric slip ring. The cutting assembly includes an axial displacement part fixedly connected to one side of the hollow air-electric slip ring, a laser generating part fixedly connected to the mobile end side of the axial displacement part, and a nozzle fixedly connected to the lower end of the laser generating part. The nozzle includes a first hollow ring body fixedly connected to the lower end of the laser generating part, a second hollow ring body clamped to the lower end of the first hollow ring body, a lens fixedly connected to the inner wall of the first hollow ring body, a high-transparency glass fixedly connected to the inner wall of the second hollow ring body and located below the lens, an air ring fixedly connected to the inner wall of the second hollow ring body and located below the high-transparency glass, and a gas inlet opened on the second hollow ring body. The air outlet mode of the air ring is a wind-concentrating type air outlet.

[0007] Further, the hollow type air-electric slip ring includes a slip ring stator fixedly connected inside the support part and a slip ring rotor rotatably connected inside the support part and connected to the slip ring stator. A driving part for driving the slip ring rotor to rotate is connected inside the support part. The driving part includes a first gear disk fixedly connected to the outer surface of the slip ring rotor, a first gear rotatably connected inside the support part and meshing with the first gear disk. A first motor is fixedly connected to one side of the support part, and the output shaft of the first motor penetrates into the support part and is fixedly connected to the first gear.

[0008] Further, the input end of the air ring penetrates through the second hollow ring body and extends outward. The lower end of the air ring is inclined with an air outlet, and a wind-concentrating cover is also fixedly connected to the lower end of the air ring. The wind-concentrating cover is in a hollow conical shape.

[0009] Further, a flow disturbance component is also connected inside the second hollow ring body. The flow disturbance component includes a second motor fixedly connected inside the second hollow ring body, a second gear rotatably connected inside the second hollow ring body, a second gear disk rotatably connected to the inner wall of the second hollow ring body and meshing with the second gear, and a plurality of flow disturbance vanes fixedly connected to the inner wall of the second gear disk. The output shaft of the second motor is fixedly connected to one side of the second gear.

[0010] Further, a heat dissipation part is also fixedly connected inside the second hollow ring body. One end of the heat dissipation part penetrates through the second hollow ring body and extends outward. The other end of the heat dissipation part is attached to one side of the second motor, and a seal is provided at the connection between the heat dissipation part and the second hollow ring body.

[0011] Further, a circumferential sucker for the welding area is also connected outside the second hollow ring body. The circumferential sucker for the welding area includes a hollow disk body fixedly connected to the outside of the second hollow ring body, a plurality of smoking ports opened at the lower end of the hollow disk body, and a negative pressure interface opened on the outer side wall of the hollow disk body and communicated with the plurality of smoking ports.

[0012] Further, it further includes an in-pipe gas suppression component, and the in-pipe gas suppression component includes two bottom plates fixedly connected to the lower end of the support part, a movable seat slidably connected to the upper ends of the two bottom plates, a cylinder fixedly connected to one side of the movable seat, a negative pressure cavity opened inside the cylinder and the movable seat, a plurality of openings opened on the outer surface of the cylinder and communicating with the negative pressure cavity, a pipe clamped to one side of the movable seat and communicating with the negative pressure cavity, and a displacement component connected to the two bottom plates for driving the movable seat to move. The displacement component includes a vertical seat fixedly connected to the upper ends of the two bottom plates, a lead screw with both ends rotatably connected to one side of the vertical seat and one side of the support part respectively, a first guide rod with both ends fixedly connected to one side of the vertical seat and one side of the support part respectively, and a third motor fixedly connected to one side of the vertical seat. The output shaft of the third motor penetrates through the vertical seat and is fixedly connected to one end of the lead screw. The lead screw is screwed inside the movable seat, and the movable seat is movably sleeved outside the first guide rod.

[0013] Further, a side plate is fixedly connected to one side of the movable seat, and the lower end of the side plate is slidably connected to the upper end of the vertical seat. A material pushing component is connected to the upper end of the side plate. The material pushing component includes a hydraulic cylinder fixedly connected to the upper end of the side plate, a sliding seat slidably connected to the upper end of the side plate, a plurality of connecting columns movably inserted inside the movable seat, and a hollow material pushing disc fixedly connected to one end of the plurality of connecting columns and sleeved outside the cylinder. The telescopic end of the hydraulic cylinder is fixedly connected to one side of the sliding seat, and the other ends of the plurality of connecting columns are all fixedly connected to one side of the sliding seat.

[0014] Further, it further includes a pipe surface dezincification component, and the pipe surface dezincification component includes two fixed seats respectively fixedly connected to both sides of the laser generating part, two adjusting cylinders respectively fixedly connected to the upper ends of the two fixed seats, two groups of second guide rods respectively movably inserted inside the two fixed seats, two mounting seats respectively fixedly connected to the lower ends of the two groups of second guide rods, a cutting blade and a chamfering blade respectively mounted at the lower ends of the two mounting seats. The telescopic ends of the two adjusting cylinders respectively penetrate through the two fixed seats and are respectively fixedly connected to the upper ends of the two mounting seats.

[0015] A high-frequency welded pipe laser cutting method uses a high-frequency welded pipe laser cutting device to cut a high-frequency welded pipe, including the following steps: Step 1, when the high-frequency welded pipe passes through the inside of the hollow type gas-electric slip ring, control the displacement component to work to drive the movable seat to move towards the support part, so that the cylinder is inserted into the inner cavity of the high-frequency welded pipe. The axial displacement part works to drive the laser generating part to move towards the high-frequency welded pipe. The first motor works to drive the slip ring rotor and the cutting component to rotate. The laser generating part works to emit a laser beam. After being focused by the lens, the laser beam cuts the high-frequency welded pipe. Step 2, during the cutting process, auxiliary gas is sent into the inside of the hollow ring body two through the gas inlet. The auxiliary gas is discharged from the bottom outlet of the hollow ring body two and blown towards the cutting place. At the same time, auxiliary gas is sent into the inside of the air ring. The auxiliary gas is discharged from the air outlet of the air ring and is guided by the air gathering cover and then converges downward to form a dynamic air curtain. Step 3: While the air ring is discharging air, the second motor operates to drive the second gear, the second gear disk, and the spoiler to rotate. By the rotation of multiple spoilers, the low-speed recirculation zone inside the second hollow ring body is broken, and the air flow boundary layer is disturbed. Step 4: A negative pressure is generated inside the pipeline to suck the fumes generated during cutting from the opening into the negative pressure chamber. The negative pressure interface is externally connected to a negative pressure pipe to create a negative pressure inside multiple smoke suction ports. The fumes generated during cutting are sucked into the smoke suction ports, and the fumes are discharged from the pipeline and the negative pressure pipe into the negative pressure device. Finally, the fumes are filtered and purified before being discharged into the air.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In this solution, a high-transparency glass is provided inside the nozzle. The high-transparency glass isolates the lens from the air flow inside the nozzle, preventing zinc vapor and oxide particles from adhering to the lens, extending the service life of the lens and reducing the cost of laser cutting (lens contamination replacement). And by providing an air ring inside the nozzle, the air outlet of the air ring faces the exhaust port of the nozzle, and the air outlet and the air gathering hood are designed for air gathering. The auxiliary gas entering the air ring is discharged from the air outlet and guided by the air gathering hood. The auxiliary gas guided by the air gathering hood converges downward inside the nozzle to form a dynamic air curtain, blocking the zinc vapor recirculation path from the lower cutting area, effectively preventing zinc vapor and oxide particles from adhering to the high-transparency glass, keeping the high-transparency glass from being contaminated, and avoiding the situation where the optical element is contaminated, resulting in laser power attenuation and cutting quality decline, and reducing the maintenance frequency.

[0017] (2) This solution is provided with a spoiler assembly. When the second motor operates to drive the second gear disk and the multiple spoilers on the inner wall of the second gear disk to rotate, the spoilers can break the low-speed recirculation zone existing inside the nozzle, disturb the air flow boundary layer, reduce the upward backspray of recirculation particles, thereby further protecting the high-transparency glass from being contaminated. And through the setting of the spoilers, it can also induce the protective gas or auxiliary gas to form a spiral stable flow, delaying the development of turbulence, thereby improving the cutting quality.

[0018] (3) This solution is provided with an in-pipe gas suppression assembly. Before cutting the high-frequency welded pipe, by controlling the translation of the cylinder and making it enter the inner cavity of the high-frequency welded pipe, the high-temperature gas and particles rising in the cutting area of the high-frequency welded pipe can be sucked into the negative pressure cavity through the negative pressure cavity and the opening inside the cylinder. The high-temperature molten slag atomized steam and particles in the cutting area are extracted in the first time, preventing them from entering the nozzle inside along with the cutting air flow or the reverse air flow, significantly reducing the probability of splash particles or condensates "flowing back" into the laser head nozzle cavity, thereby reducing the risk of the lens and the protective window being contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2Schematic diagram of the support and motor 1 of the present invention; Figure 3 Schematic diagram of gear 1, tooth disc 1 and hollow gas-electric slip ring of the present invention; Figure 4 Schematic diagram of the nozzle of the present invention; Figure 5 Cross-sectional view of hollow ring body 1 and hollow ring body 2 of the present invention; Figure 6 Schematic diagram of the air outlet and air gathering hood of the present invention; Figure 7 Schematic diagram of the circumferential suction cup in the welding area and the pipe surface dezincification assembly of the present invention; Figure 8 Schematic diagram of the in-pipe gas suppression assembly of the present invention; Figure 9 Cross-sectional view of the column of the present invention.

[0020] Explanation of the reference numerals in the figure: 1. Support part; 11. Tooth disc 1; 12. Motor 1; 13. Gear 1; 2. Hollow gas-electric slip ring; 21. Slip ring stator; 22. Slip ring rotor; 3. Cutting assembly; 31. Axial displacement part; 32. Laser generating part; 33. Nozzle; 331. Hollow ring body 1; 332. Hollow ring body 2; 333. Gas inlet; 334. Lens; 335. High-transparency glass; 336. Wind ring; 337. Air outlet; 338. Air gathering hood; 34. Turbulence generating assembly; 341. Motor 2; 342. Heat dissipation part; 343. Gear 2; 344. Tooth disc 2; 345. Turbulence generating vane; 35. Circumferential suction cup in the welding area; 351. Hollow disc body; 352. Smoking port; 353. Negative pressure interface; 4. In-pipe gas suppression assembly; 41. Bottom plate; 42. Displacement assembly; 421. Standing seat; 422. Lead screw; 423. Motor 3; 424. Movable seat; 425. Column; 426. Opening; 427. Side plate; 428. Pipeline; 429. Negative pressure chamber; 430. Guide rod 1; 43. Pushing material assembly; 431. Hydraulic cylinder; 432. Slide seat; 433. Connecting column; 434. Hollow pushing material disc; 5. Pipe surface dezincification assembly; 51. Fixed seat; 52. Adjusting cylinder; 53. Guide rod 2; 54. Mounting seat; 55. Cutting blade; 56. Chamfering blade. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1 to 9 , a high-frequency welded pipe laser cutting device, including a support part 1, a hollow air-electric slip ring 2 connected inside the support part 1, and a cutting component 3 connected to one side of the hollow air-electric slip ring 2. The cutting component 3 includes an axial displacement part 31 fixed to one side of the hollow air-electric slip ring 2, a laser generating part 32 fixed to one side of the mobile end of the axial displacement part 31, and a nozzle 33 fixed to the lower end of the laser generating part 32. The nozzle 33 includes a hollow ring body one 331 fixed to the lower end of the laser generating part 32, a hollow ring body two 332 clamped to the lower end of the hollow ring body one 331, a lens 334 fixed to the inner wall of the hollow ring body one 331, a high-transparency glass 335 (which can be made of high-purity fused quartz) fixed to the inner wall of the hollow ring body two 332 and located below the lens 334, a wind ring 336 fixed to the inner wall of the hollow ring body two 332 and located below the high-transparency glass 335 (the structure is the same as the cooling wind ring 336 in the blow molding field, the difference is that the opening angle of the air outlet 337 of the wind ring 336 is different, the air outlet 337 of this application is an inward-converging opening, and the commonly used one in the blow molding field is a diffused opening), a gas inlet 333 opened on the hollow ring body two 332, and the air outlet mode of the wind ring 336 is a wind-converging type air outlet.

[0023] The hollow air-electric slip ring 2 includes a slip ring stator 21 fixed inside the support part 1 and a slip ring rotor 22 rotatably connected inside the support part 1 and connected to the slip ring stator 21. And a driving part for driving the slip ring rotor 22 to rotate is connected inside the support part 1. The driving part includes a gear disk one 11 fixed to the outer surface of the slip ring rotor 22, a gear one 13 rotatably connected inside the support part 1 and meshed with the gear disk one 11. One side of the support part 1 is fixed with a motor one 12, and the output shaft of the motor one 12 penetrates into the support part 1 and is fixed to the gear one 13.

[0024] The input end of the wind ring 336 penetrates through the hollow ring body two 332 and extends outward. The lower end of the wind ring 336 is inclined to be provided with an air outlet 337, and a wind-converging cover 338 is also fixed to the lower end of the wind ring 336. The wind-converging cover 338 is in a hollow cone shape.

[0025] By adopting the above technical solution, when the high-frequency welded pipe passes through the hollow air-electric slip ring 2 (the hollow air-electric slip ring 2 is a rotary connection device integrating an air circuit (gas transmission) and an electric circuit (power / signal transmission). Its core feature is a hollow structure (central through-hole), which can transmit gas, power, and signals simultaneously during the rotation of the device, avoiding pipeline entanglement and being applicable to electromechanical systems requiring 360° infinite rotation. It belongs to mature existing technology and will not be elaborated here) and exits from one side of the slip ring rotor 22, the axial displacement part 31 operates to drive the laser generating part 32 to move towards the high-frequency welded pipe, making the distance between the nozzle 33 and the outer surface of the high-frequency welded pipe closer. The laser generating part 32 operates to emit a laser beam. After being focused by the lens 334, the laser beam is emitted from the nozzle 33 to cut the high-frequency welded pipe. Meanwhile, the first motor 12 operates to drive the first gear 13 and the first gear disk 11 to rotate, causing the slip ring rotor 22, the laser generating part 32, and the nozzle 33 to rotate. The nozzle 33 rotates around the high-frequency welded pipe in a circular motion to perform laser cutting on the high-frequency welded pipe. Both the gas inlet 333 and the input end of the air ring 336 are connected to the gas transmission interface on the slip ring rotor 22. During the cutting process, auxiliary gas is sent into the interior of the second hollow ring body 332 through the gas inlet 333. The auxiliary gas is discharged from the bottom opening 426 of the second hollow ring body 332 and blown towards the cutting area. The auxiliary gas entering the air ring 336 is discharged from the air outlet 337 of the air ring 336. The auxiliary gas discharged from the air outlet 337 is guided by the air gathering cover 338 and converges downward to form a dynamic air curtain, blocking the zinc vapor reflux path from the lower cutting area, effectively preventing zinc vapor and oxide particles from adhering to the high-transparency glass 335, ensuring that the high-transparency glass 335 is not contaminated, and avoiding the situation where optical elements are contaminated, resulting in laser power attenuation and cutting quality degradation, reducing the maintenance frequency. The high-transparency glass 335 is provided to isolate the lens 334 from the air flow inside the nozzle 33, preventing zinc vapor and oxide particles from adhering to the lens 334, extending the service life of the lens 334 and reducing the cost of laser cutting (the cost of replacing the lens 334 due to contamination).

[0026] As Figure 4 , Figure 5 and Figure 7 shown, a flow disturbing assembly 34 is further connected inside the second hollow ring body 332. The flow disturbing assembly 34 includes a second motor 341 fixedly connected inside the second hollow ring body 332, a second gear 343 rotatably connected inside the second hollow ring body 332, a second gear disk 344 rotatably connected to the inner wall of the second hollow ring body 332 and meshing with the second gear 343, and a plurality of flow disturbing vanes 345 fixedly connected to the inner wall of the second gear disk 344. The output shaft of the second motor 341 is fixedly connected to one side of the second gear 343.

[0027] A heat dissipation part 342 is also fixedly connected inside the second hollow ring body 332, and one end of the heat dissipation part 342 penetrates through the second hollow ring body 332 and extends outward. The other end of the heat dissipation part 342 is in contact with one side of the second motor 341, and a seal is provided at the connection between the heat dissipation part 342 and the second hollow ring body 332.

[0028] A circumferential chuck for welding area 35 is also connected to the outside of the second hollow ring body 332. The circumferential chuck for welding area 35 includes a hollow disk body 351 fixedly connected to the outside of the second hollow ring body 332, a plurality of smoke suction ports 352 opened at the lower end of the hollow disk body 351, and a negative pressure interface 353 opened on the outer side wall of the hollow disk body 351 and communicating with the plurality of smoke suction ports 352.

[0029] By adopting the above technical solution, when the second motor 341 works, it drives the second gear 343 and the second toothed disk 344 to rotate. When the second toothed disk 344 rotates, it can drive a plurality of spoiler vanes 345 to rotate. When the plurality of spoiler vanes 345 rotate inside the second hollow ring body 332, they can break the low-speed recirculation area existing inside the nozzle 33, disturb the airflow boundary layer, reduce the upward backspray of recirculation particles, thereby further protecting the high-transparency glass 335 from being contaminated. And through the arrangement of the spoiler vanes 345, it can also induce the protective gas or auxiliary gas to form a spiral stable flow and delay the development of turbulence, thereby improving the cutting quality. The negative pressure interface 353 on the hollow disk body 351 is connected to one of the gas transmission interfaces on the slip ring rotor 22, and the interface on the slip ring stator 21 that matches this gas transmission interface is connected to a negative pressure device. A negative pressure is generated inside the negative pressure interface 353, causing a negative pressure to be generated inside the plurality of smoke suction ports 352. The smoke / vapor generated during cutting can be sucked away through the smoke suction ports 352 at the lower end of the hollow disk body 351, preventing the smoke / vapor from staying near the cutting area.

[0030] Such as Figure 1 、 Figure 2 、 Figure 8 and Figure 9As shown in the figure, it further includes an in-pipe gas suppression component 4, and the in-pipe gas suppression component 4 includes two bottom plates 41 fixedly connected to the lower end of the support part 1, a movable seat 424 slidably connected to the upper ends of the two bottom plates 41, a column 425 fixedly connected to one side of the movable seat 424, a negative pressure chamber 429 opened inside the column 425 and the movable seat 424, a plurality of openings 426 opened on the outer surface of the column 425 and communicating with the negative pressure chamber 429, a pipeline 428 clamped to one side of the movable seat 424 and communicating with the negative pressure chamber 429, and a displacement component 42 connected to the two bottom plates 41 for driving the movement of the movable seat 424. The displacement component 42 includes a vertical seat 421 fixedly connected to the upper ends of the two bottom plates 41, a lead screw 422 with both ends rotatably connected to one side of the vertical seat 421 and one side of the support part 1 respectively, a first guide rod 430 with both ends fixedly connected to one side of the vertical seat 421 and one side of the support part 1 respectively, and a third motor 423 fixedly connected to one side of the vertical seat 421. The output shaft of the third motor 423 penetrates the vertical seat 421 and is fixedly connected to one end of the lead screw 422. The lead screw 422 is screwed inside the movable seat 424, and the movable seat 424 is movably sleeved outside the first guide rod 430.

[0031] One side of the movable seat 424 is fixedly connected with a side plate 427, and the lower end of the side plate 427 is slidably connected to the upper end of the vertical seat 421. The upper end of the side plate 427 is connected with a material pushing component 43. The material pushing component 43 includes a hydraulic cylinder 431 fixedly connected to the upper end of the side plate 427, a sliding seat 432 slidably connected to the upper end of the side plate 427, a plurality of connecting columns 433 movably inserted inside the movable seat 424, and a hollow material pushing disc 434 fixedly connected to one end of the plurality of connecting columns 433 and sleeved outside the column 425. The telescopic end of the hydraulic cylinder 431 is fixedly connected to one side of the sliding seat 432, and the other ends of the plurality of connecting columns 433 are all fixedly connected to one side of the sliding seat 432.

[0032] By adopting the above technical solution, when the high-frequency welded pipe passes through the inside of the hollow type gas-electric slip ring 2, the displacement component 42 is controlled to work to drive the movable seat 424 to move towards the support part 1, so that the column 425 is inserted into the inner cavity of the high-frequency welded pipe. The pipeline 428 can be externally connected to a negative pressure device, and negative pressure is generated inside the pipeline 428 and the negative pressure chamber 429. The flue gas / steam and fine particles rising in the cutting area of the high-frequency welded pipe can be inhaled into the negative pressure chamber 429 through the openings 426, and the high-temperature molten slag atomized steam and fine particles in the cutting area are pumped out in the first time, avoiding them from entering the nozzle 33 inside along with the cutting air flow or the reverse air flow, and significantly reducing the probability of the "backflow" of the splashing particles or condensates into the cavity of the nozzle 33, thereby reducing the risk of the lens 334 and the high-transparency glass 335 being contaminated.

[0033] As Figure 3 and Figure 7As shown in the figure, it further includes a zinc removal component 5 for the pipe surface, and the zinc removal component 5 for the pipe surface includes two fixing seats 51 respectively fixed on both sides of the laser generating part 32, two adjusting cylinders 52 respectively fixed on the upper ends of the two fixing seats 51, two groups of second guide rods 53 respectively movably inserted into the two fixing seats 51, two mounting seats 54 respectively fixed on the lower ends of the two groups of second guide rods 53, a cutting blade 55 and a chamfering blade 56 respectively mounted on the lower ends of the two mounting seats 54, and the telescopic ends of the two adjusting cylinders 52 respectively penetrate through the two fixing seats 51 and are respectively fixed to the upper ends of the two mounting seats 54.

[0034] By adopting the above technical solution, before laser cutting the high-frequency welded pipe, one of the adjusting cylinders 52 can be controlled to work and extend to drive one of the mounting seats 54 and the cutting blade 55 to move towards the high-frequency welded pipe. The cutting blade 55 contacts the outer surface of the high-frequency welded pipe, and thins the galvanized layer at the position on the outer surface of the high-frequency welded pipe where laser cutting is about to be performed, so that the zinc to be vaporized under the action of laser heat is significantly reduced. It can greatly reduce the chance of zinc vapor and particles entering the nozzle 33 and the optical cavity, reduce the vaporization and splash of zinc, help the cutting slag to be discharged more smoothly, with less burrs and slag adhesion at the cut, and significantly improve the flatness and smoothness of the cut seam wall. And the auxiliary gas can be more focused on purging the cutting slag rather than dispersing a large amount of zinc vapor, so the air pressure and gas volume can be appropriately reduced, saving gas costs; the other adjusting cylinder 52 works and extends to drive the other mounting seat 54 and the chamfering blade 56 to move towards the high-frequency welded pipe, and the chamfering blade 56 can chamfer the cut made by the cutting blade 55.

[0035] Usage method: Step 1, when the high-frequency welded pipe passes through the inside of the hollow type air-electric slip ring 2, control the displacement component 42 to work and drive the movable seat 424 to move towards the support part 1, so that the column body 425 is inserted into the inner cavity of the high-frequency welded pipe. The first motor 12 works to drive the slip ring rotor 22 and the cutting component 3 to rotate. The axial displacement part 31 (a single-axis moving module composed of a servo motor, a ball screw, etc., which belongs to the mature existing technology and will not be elaborated here) works to drive the laser generating part 32 to move towards the high-frequency welded pipe, and the laser generating part 32 works to emit a laser beam, and the laser beam is focused by the lens 334 to cut the high-frequency welded pipe. Step 2, during the cutting process, auxiliary gas is sent into the inside of the hollow ring body two 332 through the gas inlet 333, and the auxiliary gas is discharged from the bottom outlet of the hollow ring body two 332 and blown towards the cutting position. At the same time, auxiliary gas is sent into the inside of the air ring 336, and the auxiliary gas is discharged from the air outlet 337 of the air ring 336 and is guided by the air gathering cover 338 and then converges downward to form a dynamic air curtain. Step 3: While the air ring 336 is discharging air, the second motor 341 operates to drive the second gear 343, the second gear disc 344, and the spoiler 345 to rotate. By the rotation of multiple spoilers 345, the low-speed recirculation zone inside the second hollow ring body 332 is broken, and the airflow boundary layer is disturbed. Step 4: A negative pressure is generated inside the pipeline 428 to suck the fumes generated during cutting from the opening 426 into the negative pressure chamber 429. The negative pressure interface 353 is externally connected to a negative pressure pipe to create a negative pressure in multiple smoke suction ports 352. The fumes generated during cutting are sucked into the smoke suction ports 352, and the fumes are discharged from the pipeline 428 and the negative pressure pipe into the negative pressure equipment. Finally, the fumes are filtered and purified and then discharged into the air. The high-frequency welded pipe cut off is sleeved outside the column 425. The movable seat 424 is controlled to move towards the third motor 423 to reset. The hydraulic cylinder 431 operates to push the sliding seat 432 and the hollow pusher 434 to move. The movement of the hollow pusher 434 pushes the high-frequency welded pipe outside the column 425 to move, so that the high-frequency welded pipe is removed from the column 425 and falls down.

[0036] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A high-frequency welded pipe laser cutting device, comprising a support part (1), a hollow type gas-electric slip ring (2) connected inside the support part (1), and a cutting assembly (3) connected to one side of the hollow type gas-electric slip ring (2), characterized in that: The cutting assembly (3) includes an axial displacement part (31) fixedly connected to one side of the hollow type gas-electric slip ring (2), a laser generating part (32) fixedly connected to the movable end side of the axial displacement part (31), and a nozzle (33) fixedly connected to the lower end of the laser generating part (32); The nozzle (33) includes a hollow ring body one (331) fixedly connected to the lower end of the laser generating part (32), a hollow ring body two (332) clamped to the lower end of the hollow ring body one (331), a lens (334) fixedly connected to the inner wall of the hollow ring body one (331), a high-transparency glass (335) fixedly connected to the inner wall of the hollow ring body two (332) and located below the lens (334), a wind ring (336) fixedly connected to the inner wall of the hollow ring body two (332) and located below the high-transparency glass (335), a gas inlet (333) opened on the hollow ring body two (332), and the air outlet mode of the wind ring (336) is converging air outlet.

2. The high-frequency welded pipe laser cutting device according to claim 1, characterized in that: The hollow type gas-electric slip ring (2) includes a slip ring stator (21) fixedly connected inside the support part (1) and a slip ring rotor (22) rotatably connected inside the support part (1) and connected to the slip ring stator (21), and a driving part for driving the slip ring rotor (22) to rotate is connected inside the support part (1). The driving part includes a gear disk one (11) fixedly connected to the outer surface of the slip ring rotor (22), a gear one (13) rotatably connected inside the support part (1) and meshed with the gear disk one (11). One side of the support part (1) is fixedly connected with a motor one (12), and the output shaft of the motor one (12) penetrates into the support part (1) and is fixedly connected with the gear one (13).

3. The high-frequency welded pipe laser cutting device according to claim 2, wherein: The input end of the wind ring (336) penetrates through the hollow ring body two (332) and extends outwards. The lower end of the wind ring (336) is inclined to be provided with an air outlet (337), and a converging air hood (338) is also fixedly connected to the lower end of the wind ring (336). The converging air hood (338) is in a hollow cone shape.

4. A high-frequency welded pipe laser cutting device according to claim 3, characterized in that: A flow disturbing assembly (34) is also connected inside the hollow ring body two (332). The flow disturbing assembly (34) includes a motor two (341) fixedly connected inside the hollow ring body two (332), a gear two (343) rotatably connected inside the hollow ring body two (332), a gear disk two (344) rotatably connected to the inner wall of the hollow ring body two (332) and meshed with the gear two (343), and a plurality of flow disturbing vanes (345) fixedly connected to the inner wall of the gear disk two (344). The output shaft of the motor two (341) is fixedly connected to one side of the gear two (343).

5. A high-frequency welded pipe laser cutting device according to claim 4, characterized in that: A heat dissipation part (342) is also fixedly connected inside the hollow ring body two (332). One end of the heat dissipation part (342) penetrates through the hollow ring body two (332) and extends outwards. The other end of the heat dissipation part (342) is attached to one side of the motor two (341), and a seal is provided at the connection between the heat dissipation part (342) and the hollow ring body two (332).

6. The high-frequency welded pipe laser cutting device according to claim 5, wherein: An outer portion of the second hollow ring body (332) is further connected with a circumferential suction cup for welding area (35), and the circumferential suction cup for welding area (35) includes a hollow disk body (351) fixedly connected to the outer portion of the second hollow ring body (332), a plurality of smoking ports (352) opened at a lower end of the hollow disk body (351), and a negative pressure interface (353) opened on an outer side wall of the hollow disk body (351) and communicated with the plurality of smoking ports (352).

7. A high-frequency welded pipe laser cutting device according to claim 6, characterized in that: It further includes an in-pipe air suppression component (4), and the in-pipe air suppression component (4) includes two bottom plates (41) fixedly connected to a lower end of the support portion (1), a movable seat (424) slidably connected to upper ends of the two bottom plates (41), a column body (425) fixedly connected to one side of the movable seat (424), a negative pressure cavity (429) opened inside the column body (425) and the movable seat (424), a plurality of openings (426) opened on an outer surface of the column body (425) and communicated with the negative pressure cavity (429), a pipe (428) clamped to one side of the movable seat (424) and communicated with the negative pressure cavity (429), and a displacement component (42) connected to the two bottom plates (41) for driving the movable seat (424) to move. The displacement component (42) includes a vertical seat (421) fixedly connected to upper ends of the two bottom plates (41), a lead screw (422) with two ends respectively rotatably connected to one side of the vertical seat (421) and one side of the support portion (1), a first guide rod (430) with two ends respectively fixedly connected to one side of the vertical seat (421) and one side of the support portion (1), and a third motor (423) fixedly connected to one side of the vertical seat (421). An output shaft of the third motor (423) penetrates through the vertical seat (421) and is fixedly connected to one end of the lead screw (422). The lead screw (422) is screwed inside the movable seat (424), and the movable seat (424) is movably sleeved outside the first guide rod (430).

8. A high-frequency welded pipe laser cutting device according to claim 7, characterized in that: One side of the movable seat (424) is fixedly connected with a side plate (427), and a lower end of the side plate (427) is slidably connected to an upper end of the vertical seat (421). An upper end of the side plate (427) is connected with a material pushing component (43), and the material pushing component (43) includes a hydraulic cylinder (431) fixedly connected to an upper end of the side plate (427), a sliding seat (432) slidably connected to the upper end of the side plate (427), a plurality of connecting columns (433) movably inserted inside the movable seat (424), and a hollow material pushing disk (434) fixedly connected to one end of the plurality of connecting columns (433) and sleeved outside the column body (425). An expansion and contraction end of the hydraulic cylinder (431) is fixedly connected to one side of the sliding seat (432), and the other ends of the plurality of connecting columns (433) are all fixedly connected to one side of the sliding seat (432).

9. The high-frequency welded pipe laser cutting device according to claim 8, characterized in that: It further includes a zinc removal component (5) for the pipe surface, and the zinc removal component (5) for the pipe surface includes two fixed seats (51) respectively fixed on both sides of the laser generating part (32), two adjusting cylinders (52) respectively fixed on the upper ends of the two fixed seats (51), two groups of second guide rods (53) respectively movably inserted into the two fixed seats (51), two mounting seats (54) respectively fixed on the lower ends of the two groups of second guide rods (53), a cutting blade (55) and a chamfering blade (56) respectively mounted on the lower ends of the two mounting seats (54), and the telescopic ends of the two adjusting cylinders (52) respectively penetrate through the two fixed seats (51) and are respectively fixed to the upper ends of the two mounting seats (54).

10. A high-frequency welded pipe laser cutting method, characterized in that: When using the high-frequency welded pipe laser cutting device described in claim 9 to cut a high-frequency welded pipe, the following steps are included: Step 1, when the high-frequency welded pipe passes through the inside of the hollow type air-electric slip ring (2), control the operation of the displacement component (42) to drive the movable seat (424) to move towards the support part (1), so that the cylinder body (425) is inserted into the inner cavity of the high-frequency welded pipe, the axial displacement part (31) operates to drive the laser generating part (32) to move towards the high-frequency welded pipe, the first motor (12) operates to drive the slip ring rotor (22) and the cutting component (3) to rotate, and the laser generating part (32) operates to emit a laser beam, and the laser beam is focused by the lens (334) to cut the high-frequency welded pipe; Step 2, during the cutting process, auxiliary gas is sent into the inside of the hollow ring body two (332) through the gas inlet (333), and the auxiliary gas is discharged from the bottom outlet of the hollow ring body two (332) and blown towards the cutting part. At the same time, auxiliary gas is sent into the inside of the air ring (336), and the auxiliary gas is discharged from the air outlet (337) of the air ring (336) and is guided by the air gathering cover (338) to converge downward to form a dynamic air curtain; Step 3, while the air ring (336) is discharging air, the second motor (341) operates to drive the second gear (343), the second tooth disc (344) and the spoiler (345) to rotate, and the rotation of the multiple spoilers (345) breaks the low-speed recirculation area inside the hollow ring body two (332) and disturbs the airflow boundary layer; Step 4, negative pressure is generated inside the pipeline (428) to suck the fumes generated during cutting from the opening (426) into the negative pressure cavity (429). The negative pressure interface (353) is externally connected to a negative pressure pipe to make a negative pressure formed inside the multiple smoke suction ports (352). The fumes generated during cutting are sucked into the smoke suction ports (352), and the fumes are discharged from the pipeline (428) and the negative pressure pipe into the negative pressure equipment, and finally the fumes are filtered and purified and then discharged into the air.

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