Cutting device and cutting method for large-diameter pipeline production

Abstract

The invention relates to a cutting device and a cutting method for large-diameter pipeline production, and belongs to the technical field of cutting equipment. The pipe cutting device comprises a cutting part and a supporting part, and is characterized in that the supporting part comprises a first supporting assembly, a second supporting assembly and a supporting barrel, the cutting part is located on the supporting barrel to cut pipe diameters, and the second supporting assembly and the supporting barrel are located at the two ends of the supporting barrel to support the supporting barrel; a balance weight part corresponding to the cutting assembly is arranged on the supporting cylinder, the balance weight part comprises a plurality of balance weight units, a second traction rope and a driving roll shaft, and the multiple balance weight units are driven to balance the weight of the cutting assembly; electromagnets are arranged at the inlet and the outlet of the cutting assembly to form a virtual stop surface. According to the cutting device and method for large-diameter pipeline production, through the design of the supporting part and the balance weight part, the flatness and the cutting precision of the cutting face are guaranteed, the cutting error is remarkably reduced, the cutting efficiency is improved, and the finishing frequency is reduced.

Description

Technical Field

[0001] The present invention relates to a cutting device and a cutting method for large-diameter pipeline production, belonging to the technical field of cutting equipment. Background Art

[0002] With the rapid development of the construction industry, the demand for large-diameter metal pipelines is increasing day by day. As an important link in pipeline processing, the quality and efficiency of pipeline cutting directly affect the quality and progress of subsequent construction. In the prior art, cutting is usually carried out by a handheld small cutting machine. The general operation is to draw a circular cutting line on the pipeline and then cut along the cutting line. Due to the uncertainty of the operation of the handheld cutting machine, it is very difficult to ensure the flatness of the cutting surface when drawing a circular cutting line on the pipeline and cutting along the cutting line. This not only affects the aesthetics of the pipeline, but more importantly, it may cause stress concentration in the pipeline during use, thereby triggering potential safety hazards. The end faces of metal pipelines at construction sites usually have problems such as wear and unevenness, which further exacerbate the cutting error. The two ends of the cut metal pipeline are uneven, making it difficult to ensure the size of the fixed-length pipeline, easily resulting in a reduced degree of fit at the joints between pipes during construction, and affecting the stability and safety of the entire pipeline system. When a handheld cutting machine cuts a large-diameter pipeline, due to the large diameter and thick wall of the pipeline, the cutting process is time-consuming and laborious. In addition, due to the uneven cutting surface and large cutting error, multiple cuts and trimmings are often required, further reducing the cutting efficiency.

[0003] Existing pipeline cutting devices mostly adopt single-point or simple support structures, which are difficult to quickly adapt to pipelines of different diameters and have low adjustment accuracy. During the cutting process, due to single-point force or unstable support structures, the cutting device is prone to deflection or shaking, thus affecting the cutting quality and efficiency. Summary of the Invention

[0004] The present invention provides a cutting device and a cutting method for large-diameter pipeline production to solve the problems of uneven cutting surface, large cutting error, and low cutting efficiency in the prior art.

[0005] The present invention provides a cutting device and a cutting method for large-diameter pipeline production, which include a cutting part and a support part. The characteristics are as follows: The support part includes a first support assembly, a second support assembly, and a support cylinder. The cutting part is located on the support cylinder to cut the pipe diameter. The second support assembly and the support cylinder are located at both ends of the support cylinder to support the support cylinder. The cutting part includes a cutting assembly and an adjustment assembly. The cutting assembly cuts the pipeline. A counterweight part corresponding to the cutting assembly is provided on the support cylinder. The counterweight part includes a plurality of counterweight units, a second towing rope, and a driving roller shaft. The plurality of counterweight units are connected in series on the second towing rope, and the driving of the plurality of counterweight units counterweights the cutting assembly; The counterweight unit includes a plurality of counterweight balls. The plurality of counterweight balls are arranged and combined. Electromagnets corresponding to the counterweight unit are provided at the inlet and outlet of the cutting assembly. The electromagnets adsorb the counterweight unit to apply a gradient magnetic field in the same direction as the movement direction, and repel to form a virtual stop surface, and the electromagnets perform non-contact magnetic buffering on the counterweight unit.

[0006] Preferably, the counterweight unit includes a plurality of first counterweight balls. The plurality of first counterweight balls are linearly distributed in a circle on the second towing rope. The first counterweight balls enter the inside of the cutting assembly and slide to offset the torque generated by the centrifugal force, maintaining the dynamic balance of the cutting assembly.

[0007] Preferably, the counterweight unit includes a plurality of second counterweight balls and third counterweight balls. The plurality of second counterweight balls and third counterweight balls are linearly staggered on the second towing rope. The head and tail of the second towing rope are connected to form a loop. The driving roller shaft drives the second counterweight balls and third counterweight balls to move in a cycle inside the cutting assembly, obtaining a stepped mass increment and realizing continuous fine adjustment of the mass.

[0008] Preferably, the counterweight part further includes a plurality of fourth counterweight balls. The plurality of fourth counterweight balls are located at the head and tail of the counterweight unit to space between adjacent two counterweight units. The fourth counterweight balls are filled with magnetic powder, and the electromagnets adsorb and repel the fourth counterweight balls.

[0009] Preferably, the counterweight part further includes a counterweight sleeve. The counterweight sleeve is connected end to end to form a loop. The counterweight sleeve covers the second towing rope and the counterweight unit. An airbag is provided inside the counterweight sleeve to squeeze and cover the plurality of counterweight units. A magnetic ring corresponding to the electromagnet is provided on the outer wall of the counterweight sleeve.

[0010] Preferably, the cutting assembly includes a cutting arm and a cutting tool group. The cutting arm is hinged to the support cylinder. The cutting arm is angle-adjusted through an adjustment assembly. A cutting block is provided on the cutting arm to cut the pipeline through the cutting block.

[0011] Preferably, the adjustment assembly includes a second roller screw and a third sleeve. The thread directions at both ends of the second roller screw are opposite. The third sleeve is located at both ends of the second roller screw and is threadedly connected to the second roller screw. The third sleeve is connected to the cutting arm through a first towing rope to adjust the angle of the cutting arm.

[0012] Preferably, the first support assembly includes a first sleeve and a second sleeve. The first support assembly is connected to the support cylinder through a first roller screw. The first sleeve is threadedly connected to the first roller screw. A first support arm and a second support arm are respectively provided on the first sleeve and the second sleeve. The first support arm and the second support arm are hinged to each other. The first support arm is hinged to the first sleeve. The second support arm is fixedly connected to the second sleeve.

[0013] Preferably, the second support assembly includes a fixed disk and a third support arm. The third support arm is slidably connected to the fixed disk. There are multiple third support arms, and a linkage assembly is provided between the multiple third support arms for linkage. A clamping assembly corresponding to the pipeline is provided on the third support arm.

[0014] Preferably, a rack is provided on the third support arm. The linkage assembly includes a first gear meshing with the rack and a second gear meshing with the first gear. The second gear is an internal gear. The first gear corresponds to the first third support arm. The clamping assembly includes a first clamping block and a second clamping block. The first clamping block and the second clamping block are slidably connected to the third support arm. The first clamping block and the second clamping block achieve synchronous displacement of the upper and lower clamping blocks through a screw rod, generating a bidirectional clamping force.

[0015] A cutting method for large-diameter pipeline production includes inserting a support cylinder into the pipeline interior, supporting both ends of the support cylinder through a first support assembly and a second support assembly to form a symmetric support force field inside the pipeline, avoiding skew caused by single-point stress. The angle of the cutting assembly is adjusted through an adjustment assembly so that the cutting assembly contacts the inner wall of the pipeline. The cutting assembly is weighted through a weight unit in the counterweight part to ensure that the cutting assembly maintains a stable posture during cutting, reducing energy loss and cutting resistance fluctuations caused by jitter. The weight unit drives a weight sleeve to move in the cutting assembly through a driving roller shaft. When the corresponding weight unit enters the cutting assembly, the electromagnet at the inlet of the cutting assembly starts to be energized, and the electromagnet at the outlet is de-energized. The electromagnet at the inlet repels the next weight unit to form a virtual stop surface to prevent non-target weight units from entering. The outlet electromagnet attracts the end of the unit that has completed weighting to prevent it from retreating into the cutting assembly interior. During the movement of the weight unit, the electromagnet applies a gradient magnetic field in the same direction as the movement direction to reduce the frictional resistance of the second traction rope. Combining the magnetic adsorption characteristics of the magnetic ring, stepless virtual mass adjustment is achieved, breaking through the limitations of traditional weight adjustment, enabling more precise and continuous weight adjustment, and improving the adaptability of the cutting device to different cutting conditions. The beneficial effects of the present invention: The present invention provides a cutting device and a cutting method for the production of large-diameter pipelines. By forming a symmetric support force field inside the pipeline through the support part, the skew caused by single-point force is avoided, thus ensuring the flatness of the cutting surface. The counterweight part dynamically counterweights the cutting component through multiple counterweight units, offsetting the torque generated by the centrifugal force, further maintaining the dynamic balance of the cutting component, reducing the cutting error caused by jitter. By adopting a combination of counterweight balls with different masses, counterweight sleeves and air bags, etc., more precise and continuous counterweight adjustment is achieved, further improving the cutting accuracy. The counterweight sleeve and the air bag effectively prevent the collision and friction of counterweight balls with different diameters and masses during movement, reducing the wear of the counterweight balls and extending the service life of the counterweight balls. The first support component and the second support component can quickly adapt to pipelines with different pipe diameters and have high adjustment accuracy, thus reducing the cutting error. The adjustment component realizes the precise adjustment of the angle of the cutting arm through the second ball screw and the third sleeve, so that it can quickly locate the cutting position, improving the cutting efficiency and reducing the number of multiple cuts and trimming times required due to inaccurate dimensions, further improving the cutting efficiency. The cutting tool group can cut obstacles in the cutting path, such as welding slag, scale, etc., ensuring the smooth progress of the cutting process, reducing the frequency of shutdown for cleaning, and improving the cutting efficiency. The double-knife design of the cutting tool group can reduce the overall cutting energy consumption, reduce the wear of the cutting tool, and improve the service life of the cutting tool. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of a cutting device and a cutting method for the production of large-diameter pipelines according to the present invention.

[0017] Figure 2 It is a schematic diagram of the sectional structure of a cutting device and a cutting method for the production of large-diameter pipelines according to the present invention.

[0018] Figure 3 It is a schematic diagram of the structure of the clamping component of a cutting device and a cutting method for the production of large-diameter pipelines according to the present invention.

[0019] Figure 4 It is a schematic diagram of the structure of the cutting component of a cutting device and a cutting method for the production of large-diameter pipelines according to the present invention.

[0020] Figure 5 It is a schematic diagram of the partial sectional structure of a cutting device and a cutting method for the production of large-diameter pipelines according to the present invention.

[0021] Figure 6 It is a schematic diagram of the structure of the adjustment component of a cutting device and a cutting method for the production of large-diameter pipelines according to the present invention.

[0022] Figure 7 It is a schematic diagram of the structure of the counterweight part of a cutting device and a cutting method for the production of large-diameter pipelines according to the present invention.

[0023] Figure 8 This is a partial structural schematic diagram of the counterweight part of a cutting device and a cutting method for the production of large-diameter pipelines according to the present invention.

[0024] In the figure: 1. Cutting part, 11. Cutting assembly, 111. Cutting arm, 112. Cutting tool group, 1121. First cutting tool, 1122. Second cutting tool, 1123. Second spring, 113. First spring, 114. First connecting block, 115. Cutting block, 12. Adjusting assembly, 121. Second roller screw, 122. Third sleeve, 123. First towing rope, 2. Supporting part, 21. First supporting assembly, 211. First sleeve, 2111. First supporting arm, 2112. First supporting block, 212. Second sleeve, 2121. Second supporting arm, 22. Second supporting assembly, 221. Fixed disk, 222. Third supporting arm, 23. Supporting cylinder, 231. First roller screw, 232. Telescopic rod, 24. Clamping assembly, 241. First clamping block, 242. Second clamping block, 243. Screw rod, 25. Linkage assembly, 251. First gear, 252. Second gear, 3. Counterweight part, 31. Second towing rope, 32. Driving roller shaft, 33. First counterweight ball, 34. Second counterweight ball, 35. Third counterweight ball, 36. Fourth counterweight ball, 37. Counterweight sleeve, 371. Magnetic ring. Detailed implementation manners

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Embodiment 1: The present invention provides a cutting device and a cutting method for the production of large-diameter pipelines, which include a cutting part 1 and a supporting part 2. The supporting part 2 includes a first supporting component 21, a second supporting component 22, and a supporting cylinder 23. The cutting part 1 is located on the supporting cylinder 23. The first supporting component 21 and the second supporting component 22 are respectively located at both ends of the supporting cylinder 23. The first supporting component 21 is connected to the supporting cylinder 23 through a first roller screw 231. The first supporting component 21 includes a first sleeve 211 and a second sleeve 212. The first sleeve 211 is located on the first roller screw 231 and is threadedly connected to the first roller screw 231. The second sleeve 212 is located at one end of the supporting cylinder 23 close to the first roller screw 231 and is fixedly connected to the supporting cylinder 23. A plurality of first supporting arms 2111 are provided on the first sleeve 211. The plurality of first supporting arms 2111 are evenly distributed in a circle on the first sleeve 211 and are hinged to the first sleeve 211. A first supporting block 2112 is provided at the end of the first supporting arm 2111 away from the first sleeve 211. The inner wall of the pipeline is supported by the first supporting block 2112. A second supporting arm 2121 corresponding to the first supporting arm 2111 is provided on the second sleeve 212. Both ends of the second supporting arm 2121 are hinged to the second sleeve 212 and the first supporting arm 2111 respectively. The first roller screw 231 is driven by a motor; The second supporting component 22 includes a fixed disk 221 and a third supporting arm 222. A plurality of openings corresponding to the third supporting arm 222 are provided on the fixed disk 221. The bottom of the third supporting arm 222 penetrates through the opening and expands outward along the opening. A linkage component 25 is provided between the plurality of third supporting arms 222 to expand outward synchronously. A clamping component 24 is provided at the top of the third supporting arm 222. The clamping component 24 is slidably connected to the third supporting arm 222. The clamping component 24 includes a first clamping block 241 and a second clamping block 242. A first sliding groove corresponding to the clamping component 24 is provided on the third supporting arm 222. Both the first clamping block 241 and the second clamping block 242 are slidably connected to the first sliding groove. The second clamping block 242 is located above the first clamping block 241. A screw 243 penetrates through the first clamping block 241 and the second clamping block 242 and is threadedly connected to the first clamping block 241. One end of the second clamping block 242 close to the first clamping block 241 is an inward concave arc-shaped notch, and one end of the top of the first clamping block 241 close to the second clamping block 242 is an outward convex arc-shaped protrusion corresponding to the second clamping block 242; A rack corresponding to the linkage component 25 is provided on the third supporting arm 222. The linkage component 25 includes a first gear 251 and a second gear 252 that mesh with the rack. The first gear 251 is provided in plurality corresponding to the third supporting arm 222, and the second gear 252 is an internal gear and meshes with the plurality of first gears 251; The fixed disk 221 and the support cylinder 23 are connected by a telescopic rod 232. The cutting part 1 is located on the support cylinder 23. The cutting part 1 includes a cutting assembly 11 and an adjusting assembly 12. The cutting assembly 11 is located on the support cylinder 23, and the angle of the cutting assembly 11 is adjusted by the adjusting assembly 12. The cutting assembly 11 includes a cutting arm 111 and a cutting tool group 112. A first connecting block 114 corresponding to the cutting arm 111 is provided on the support cylinder 23. The cutting arm 111 is hinged to the first connecting block 114. The cutting tool group 112 is located at one end of the cutting arm 111. A first spring 113 is provided between the end of the cutting arm 111 far from the first connecting block 114 and the support cylinder 23. A cutting block 115 is provided at the end of the cutting arm 111 close to the first spring 113. The pipe diameter is cut by the cutting block 115. The support cylinder 23 is driven to rotate by a motor; The adjusting assembly 12 includes a second ball screw 121 and a third sleeve 122. The second ball screw 121 is driven by a motor. The thread directions at both ends of the second ball screw 121 are opposite. The third sleeve 122 is located at both ends of the second ball screw 121 and is threadedly connected to the second ball screw 121. A second sliding groove corresponding to the third sleeve 122 is provided on the support cylinder 23. The third sleeve 122 is slidably connected along the second sliding groove. The third sleeve 122 is connected to the end of the cutting arm 111 close to the first connecting block 114 by a first traction rope 123; A cavity corresponding to the cutting assembly 11 is provided inside the support cylinder 23. A weight part 3 slidably connected inside the cutting arm 111 is provided in the cavity. The weight part 3 includes a plurality of first weight balls 33. The plurality of first weight balls 33 are connected in series by a second traction rope 31. A driving roller shaft 32 corresponding to the first weight ball 33 is provided in the cavity. The driving roller shaft 32 is driven by a motor. The driving roller shaft 32 rotates in the cavity. A notch corresponding to the outer surface of the first weight ball 33 is provided on the driving roller shaft 32.

[0027] When in use, place the device inside the pipeline to be cut. Pull up one of the third support arms 222. The upward movement of the third support arm 222 drives the rotation of one of the first gears 251. The first gear 251 meshes with the second gear 252, thereby driving the second gear 252 to rotate synchronously. The second gear 252 drives the synchronous rotation of the remaining multiple first gears 251. The remaining first gears 251 drive the synchronous outward expansion of the remaining third support arms 222. At the same time, by moving the clamping assembly 24, the second clamping block 242 and the first clamping block 241 are respectively located on the outer wall and the inner wall of the pipeline to be cut, and are clamped by rotating the screw 243. The second clamping block 242 is designed with an inner concave shape and the first clamping block 241 is designed with an outer convex shape, which can better clamp the pipeline and prevent slipping caused by the uneven surface of the pipeline. The up-and-down clamping blocks are synchronously displaced through the screw 243 to generate a two-way clamping force, avoiding the moment imbalance caused by unilateral pressure. The telescopic rod 232 drives the support cylinder 23 to start telescoping, moving the cutting part 1 to the designated position to be cut. At the same time, the motor drives the first roller screw 231 to rotate. The first roller screw 231 drives the first sleeve 211 to move towards the second sleeve 212. During the movement of the first sleeve 211, it drives the first support arm 2111 to rotate clockwise around the hinge point with the second support arm 2121, realizing the outward expansion of the first support block 2112. The first support block 2112 contacts the inner wall of the pipeline, thereby realizing the fixation of both ends of the support cylinder 23 with the pipeline to be cut, avoiding the problems that traditional support structures mostly use fixed sizes or manual adjustment, which are difficult to quickly adapt to pipelines with different diameters and have low adjustment accuracy. By fixing both ends, the device forms a symmetric support force field inside the pipeline, avoiding skewing caused by single-point stress. After the support cylinder 23 is fixed, the motor drives the second roller screw 121 to rotate. The second roller screw 121 drives the two ends of the third sleeve 122 to start expanding outward synchronously. During the movement of the third sleeve 122, it pulls the first traction rope 123. The first traction rope 123 drives the cutting arm 111 to start rotating counterclockwise. The cutting block 115 at the top of the cutting arm 111 contacts the inner wall of the pipeline. By driving the support cylinder 23 to rotate through the motor, the cutting block 115 starts cutting the pipeline. The inclination angle of the cutting arm 111 is precisely controlled through the first traction rope 123 to realize the linear adjustment of the cutting depth. During the cutting process, the cutting tool group 112 cleans the pre-cut path of the cutting block 115 to ensure there are no obstacles, reduces the fluctuation of the cutting resistance, prevents the cutting arm 111 from shaking, and at the same time removes the oxide layer and debris on the pipe wall during cutting, reducing the frequency of shutdown for cleaning. And by driving the drive roller shaft 32 to rotate through the motor, the drive roller shaft 32 drives the corresponding drive roller shaft 32 to move into the cutting arm 111 to counterweight the cutting arm 111 and offset the torque generated by the centrifugal force, maintaining the dynamic balance of the cutting arm 111, further preventing the cutting arm 111 from shaking during the rotation of the support cylinder 23 and avoiding cutting out notches.

[0028] Compared with the existing design, the first support assembly 21 drives the first sleeve 211 to move through the first roller screw 231, and then drives the first support arm 2111 to rotate around the hinge point with the second support arm 2121, realizing the outward expansion of the first support block 2112 to contact the inner wall of the pipeline. It can quickly adapt to pipelines with different diameters, solving the problems that traditional support structures mostly use fixed sizes or manual adjustment, which are difficult to quickly adapt and have low adjustment accuracy. The multiple first support arms 2111 are evenly distributed in a circle, which can provide uniform support force and ensure the stability of the device in the pipeline. Pull up one of the third support arms 222, and through the meshing relationship between the first gear 251 and the second gear 252 in the linkage assembly 25, drive the rest of the third support arms 222 to expand outward synchronously, enabling the clamping assembly 24 to reach the position of the outer wall of the pipeline quickly and accurately. The concave arc-shaped notch of the second clamping block 242 and the convex arc-shaped protrusion design of the first clamping block 241 in the clamping assembly 24 can better fit the surface of the pipeline, avoiding slipping caused by the uneven surface of the pipeline. By rotating the screw 243, the synchronous displacement of the upper and lower clamping blocks is realized, generating a two-way clamping force, avoiding the moment imbalance caused by unilateral pressure, ensuring that the device is firmly fixed in the pipeline. The first support assembly 21 and the second support assembly 22 respectively fix the pipeline from both ends of the support cylinder 23, forming a symmetric support force field, avoiding skewing caused by single-point force, and keeping the device stable inside the pipeline, providing a basis for subsequent cutting work. By driving the third sleeve 122 to move through the second roller screw 121 in the adjustment assembly 12, the third sleeve 122 drives the cutting arm 111 to rotate through the first traction rope 123, thereby precisely controlling the inclination angle of the cutting arm 111, realizing the linear adjustment of the cutting depth, meeting different cutting requirements, and improving the cutting accuracy and flexibility. During the cutting process, the cutting tool group 112 cleans the pre-cut path of the cutting block 115 to ensure there are no obstacles, reduce the fluctuation of the cutting resistance, and prevent the cutting arm 111 from shaking. At the same time, the oxide layer and debris on the pipe wall are removed during cutting, reducing the frequency of shutdown cleaning, and improving the cutting efficiency and quality. One end of the cutting arm 111 far from the first connecting block 114 is connected to the support cylinder 23 through the first spring 113. The first spring 113 can play a buffering role during the cutting process, reducing the impact of cutting force fluctuation on the cutting arm 111 and the overall device, and further ensuring the stability of cutting. The counterweight part 3 is located in the cavity inside the support cylinder 23. By driving the driving roller 32 to rotate through the motor, driving the first counterweight ball 33 to slide inside the cutting arm 111 can offset the torque generated by the centrifugal force, maintain the dynamic balance of the cutting arm 111, further prevent the cutting arm 111 from shaking during the rotation of the support cylinder 23, avoid cutting out notches, and improve the cutting quality.

[0029] Embodiment 2: In the above embodiment, equal-mass first counterweight balls 33 are combined, and the minimum adjustment unit is the mass of a single first counterweight ball 33. Continuous fine-tuning of the mass cannot be achieved, resulting in system resonance easily caused by excessive counterweight when cutting thin-walled pipes. Therefore, in this embodiment of the present application, the counterweight part 3 is optimized to a certain extent on the basis of the above embodiment.

[0030] In this embodiment, the second towing rope 31 forms a ring-shaped distribution with its head and tail connected. The counterweight part 3 includes a plurality of second counterweight balls 34 and third counterweight balls 35. The masses of the plurality of second counterweight balls 34 and third counterweight balls 35 are different, and the second counterweight balls 34 and third counterweight balls 35 are distributed at intervals and staggered on the second towing rope 31.

[0031] During use, the corresponding second counterweight balls 34 and third counterweight balls 35 are driven into the cutting arm 111 by the driving roller shaft 32. Since the masses of the second counterweight balls 34 and third counterweight balls 35 are inconsistent, the total mass entering the cutting arm 111 can be flexibly adjusted according to the diameter and wall thickness of the pipe to be cut, ensuring that the counterweight of the cutting arm 111 can be finely adjusted during the cutting process. By selecting different combinations of counterweight balls with different masses, a stepped mass increment can be obtained, and continuous fine-tuning of the mass can be achieved by controlling the number of counterweight balls entering the cutting arm.

[0032] Compared with the existing design, by adopting a plurality of second counterweight balls 34 and third counterweight balls 35 with different masses, the total mass entering the cutting arm 111 can be flexibly adjusted according to the pipe diameter and wall thickness to be cut, effectively avoiding the problem of system resonance caused by excessive counterweight. The second towing rope 31 forms a ring-shaped distribution with the head and tail connected, and the second counterweight balls 34 and third counterweight balls 35 are distributed at intervals and misaligned on the second towing rope 31. By driving the corresponding second counterweight balls 34 and third counterweight balls 35 into the cutting arm 111 through the driving roller shaft 32, due to the inconsistent masses of the counterweight balls, by selecting different combinations of counterweight balls with different masses, a stepped mass increment can be obtained, and then by controlling the number of counterweight balls entering the cutting arm, continuous fine adjustment of the mass can be achieved, making the counterweight adjustment more accurate, better adapting to the cutting requirements of different pipe diameters and wall thicknesses. The combinations of second counterweight balls 34 and third counterweight balls 35 with different masses provide more possibilities for counterweight adjustment. During the actual cutting process, according to the specific conditions of the pipe to be cut, such as pipe diameter, wall thickness, material, etc., a suitable combination of counterweight balls can be flexibly selected to make the counterweight of the cutting arm 111 reach the optimal state, thereby improving the cutting stability and accuracy, enabling the cutting device to handle more complex and variable cutting tasks. By finely adjusting the counterweight of the cutting arm 111, the torque generated by the centrifugal force can be offset, and the dynamic balance of the cutting arm 111 can be maintained. During the cutting process, the shaking of the cutting arm caused by unreasonable counterweight is avoided, thereby ensuring the cutting stability and improving the cutting quality. The stable cutting process can reduce the cutting error and make the cutting surface smoother. Since the counterweight adjustment is more accurate, the cutting arm 111 can maintain a stable posture during the cutting process, reducing the energy loss and cutting resistance fluctuation caused by shaking. This makes the cutting process smoother and improves the cutting efficiency. At the same time, the stable cutting state also helps to improve the cutting accuracy and make the cutting size more in line with the design requirements.

[0033] Embodiment 3: In the above-mentioned embodiment, there is no physical separation in the counterweight unit of the traditional annular traction system, and adjacent units are prone to collide and overlap due to inertia during high-speed movement, resulting in mass calculation errors. Therefore, in this application embodiment, the counterweight part 3 is optimized on the basis of the above-mentioned embodiment.

[0034] In this embodiment, the counterweight part 3 further includes a fourth counterweight ball 36. A plurality of fourth counterweight balls 36 are located on the second towing rope 31. A plurality of first counterweight balls 33 and second counterweight balls 34 on the second towing rope 31 are combined to form a plurality of counterweight units with different masses. The plurality of counterweight units are spaced apart by the fourth counterweight balls 36. The fourth counterweight balls 36 are located at the head and tail of the corresponding counterweight units. The fourth counterweight balls 36 are provided with magnetic powder, and electromagnets corresponding to the fourth counterweight balls 36 are provided at the inlet and outlet at both ends of the cutting arm 111, and the magnetic poles of the electromagnets at the outlet and inlet are opposite.

[0035] During use, different numbers of second counterweight balls 34 and third counterweight balls 35 are combined and distributed into different counterweight units by multiple fourth counterweight balls 36. The fourth counterweight balls 36 serve as magnetic separation identification bodies and form independent counterweight units in combination with ordinary counterweight balls. The numbers of second counterweight balls 34 and third counterweight balls 35 in each counterweight unit can be freely combined to form a discretized mass gradient library. The motor drives the driving roller shaft 32 to rotate, driving the corresponding counterweight unit into the cutting arm 111. At the same time, the electromagnet at the outlet of the cutting arm 111 is energized to adsorb the fourth counterweight balls 36 of the corresponding counterweight unit. When the corresponding counterweight unit enters the cutting arm 111, the electromagnet at the inlet of the cutting arm 111 starts to be energized, and the electromagnet at the outlet is de-energized. The electromagnet at the inlet repels the fourth counterweight balls 36 in the next counterweight unit to form a virtual stop surface to prevent non-target counterweight units from entering. The outlet electromagnet attracts the fourth counterweight balls at the end of the unit that has completed the counterweight to prevent it from retreating into the inside of the cutting arm 111. During the movement of the counterweight unit, the electromagnet applies a gradient magnetic field in the same direction as the movement direction to reduce the frictional resistance of the second towing rope 31. Combining with the magnetic adsorption characteristics of the fourth counterweight balls 36, stepless virtual mass adjustment is achieved. At the moment when the electromagnet at the outlet of the cutting arm 111 is de-energized, the fourth counterweight balls 36 cut the magnetic induction lines to generate a reverse Lorentz force, and the magnetic powder in the fourth counterweight balls 36 forms an eddy current damping effect when the counterweight unit suddenly stops, achieving non-contact magnetic buffering.

[0036] Compared with the prior art, different numbers of second counterweight balls 34 and third counterweight balls 35 are combined and distributed into different counterweight units by multiple fourth counterweight balls 36. The fourth counterweight balls 36 serve as magnetic separation identification bodies and form independent counterweight units in combination with ordinary counterweight balls, effectively avoiding the collision and overlap of adjacent counterweight units during high-speed movement, ensuring the accuracy of mass calculation, improving the precision of counterweight adjustment. The numbers of second counterweight balls 34 and third counterweight balls 35 in each counterweight unit can be freely combined to form a discrete mass gradient library, making the counterweight adjustment more flexible and diverse. It can quickly select a suitable combination of counterweight units according to different cutting requirements to achieve more precise counterweight adjustment. The motor drives the drive roller shaft 32 to rotate, driving the corresponding counterweight unit into the cutting arm 111. At the same time, the electromagnet at the outlet of the cutting arm 111 is energized to adsorb the fourth counterweight balls 36 of the corresponding counterweight unit. When the corresponding counterweight unit enters the cutting arm 111, the electromagnet at the inlet of the cutting arm 111 starts to be energized and the electromagnet at the outlet is de-energized. The electromagnet at the inlet repels the fourth counterweight balls 36 in the next counterweight unit to form a virtual stop surface to prevent non-target counterweight units from entering. The outlet electromagnet attracts the fourth counterweight balls at the end of the unit that has completed the counterweight to prevent it from retreating into the interior of the cutting arm 111. During the movement of the counterweight unit, the electromagnet applies a gradient magnetic field in the same direction as the movement direction to reduce the frictional resistance of the second traction rope 31. Combining with the magnetic adsorption characteristics of the fourth counterweight balls 36, stepless virtual mass adjustment is achieved, breaking through the limitations of traditional counterweight adjustment, enabling more refined and continuous counterweight adjustment, and improving the adaptability of the cutting device to different cutting conditions. The electromagnet applies a gradient magnetic field in the same direction as the movement direction and combines with the magnetic adsorption characteristics of the fourth counterweight balls 36 to reduce the frictional resistance of the second traction rope 31, making the counterweight unit move more smoothly during movement, reducing energy loss, and improving the efficiency and stability of counterweight adjustment. When the electromagnet at the outlet of the cutting arm 111 is de-energized instantaneously, the fourth counterweight balls 36 cut the magnetic induction line to generate a reverse Lorentz force. The magnetic powder in the fourth counterweight balls 36 forms an eddy current damping effect when the counterweight unit makes an emergency stop, achieving non-contact magnetic buffering, avoiding the wear and energy loss caused by contact friction of traditional buffer devices, and at the same time being able to effectively reduce the impact when the counterweight unit makes an emergency stop, improving the service life and operating stability of the device.

[0037] Example 4: In the above embodiments, when the counterweight balls with different diameters / masses move on the second traction rope 31, collision and friction occur due to clearance tolerance. And when a traditional single-edge tool encounters mixed obstacles such as welding slag and scale, it is easy to cause chipping or jamming due to hardness differences. Therefore, in this application example, the counterweight part 3 and the cutting tool group 112 are optimized to a certain extent on the basis of the above embodiments.

[0038] In this embodiment, the counterweight part 3 further includes a counterweight sleeve 37, which is connected end to end to form a ring and covers the counterweight unit. An airbag is provided in the counterweight sleeve 37, and the second counterweight ball 34, the third counterweight ball 35, and the fourth counterweight ball 36 in the counterweight sleeve 37 are covered by the inflation of the airbag to prevent the counterweight balls with different diameters and masses from shaking. The outer surface of the counterweight sleeve 37 is provided with a magnetic ring 371 corresponding to the electromagnet; The cutting knife group 112 includes a first cutting knife 1121 and a second cutting knife 1122. The first cutting knife 1121 is fixedly connected to the cutting arm 111. The top of the second cutting knife 1122 is hinged to the first cutting knife 1121. The top is connected to the first cutting knife 1121 through a second spring 1123. The diameter of the first cutting knife 1121 is greater than that of the second cutting knife 1122.

[0039] When in use, the second traction rope 31 and the counterweight ball on the second traction rope 31 are covered by the counterweight sleeve 37, and the airbag in the counterweight sleeve 37 begins to inflate, and the counterweight blocks of different diameters and masses are limited and fixed to ensure that the outer diameter of the corresponding counterweight unit remains consistent during the process of entering the interior of the cutting arm 111, and to prevent the counterweight block from moving. The electromagnet achieves the purpose of positioning the corresponding counterweight unit by adsorbing and repelling the magnetic ring 371. At the same time, during the cutting process, the cutting knife group 112 cuts obstacles in the cutting path, the first cutting knife 1121 cuts larger obstacles, and the second cutting knife 1122 is in contact with the pipe under the action of the second spring 1123. The inner wall of the pipe is in contact with the first cutting knife 1121, and smaller obstacles and obstacles cut small by the first cutting knife 1121 are cut. The first cutting knife 1121 and the second cutting knife 1122 are combined to realize rapid cleaning of the cutting path. The first cutting knife 1121 breaks macroscopic obstacles such as weld nodules with high rigidity, and the second cutting knife 1122 fits the pipe wall to finely remove micro particles. The first cutting knife 1121 pre-cuts to form a stress concentration area, and the second cutting knife 1122 performs secondary cutting along the crack propagation path to reduce the overall cutting energy consumption. A wedge-shaped cavity is formed between the first cutting knife 1121 and the second cutting knife 1122, and the debris is radially thrown out by the cutting rotation centrifugal force to prevent repeated crushing.

[0040] Compared with the prior art, the counterweight sleeves 37 are connected end to end to form a ring and wrap the counterweight units. An airbag is provided inside the counterweight sleeve 37. By inflating the airbag, each of the second counterweight balls 34, third counterweight balls 35, and fourth counterweight balls 36 inside the counterweight sleeve 37 is wrapped, which can effectively prevent the counterweight balls with different diameters and masses from colliding and rubbing due to clearance tolerances when moving on the second towing rope 31, improving the smoothness and stability of the movement of the counterweight balls, reducing the wear of the counterweight balls, and extending the service life of the counterweight balls. After the airbag is inflated, it ensures that the outer diameter remains consistent during the process of the corresponding counterweight unit entering the inside of the cutting arm 111, enabling the counterweight unit to enter the cutting arm 111 accurately and stably, improving the accuracy and reliability of counterweight adjustment. During the cutting process, the first cutting knife 1121 breaks through macroscopic obstacles such as welding beads with high stiffness to form a stress concentration area by pre-cutting. The second cutting knife 1122 fits against the pipe wall and performs secondary cutting along the crack propagation path, which can reduce the overall cutting energy consumption. Because the stress concentration area formed by pre-cutting makes the subsequent cutting easier and reduces the consumption of cutting force. A wedge-shaped cavity is formed between the first cutting knife 1121 and the second cutting knife 1122, and the cutting rotation centrifugal force is used to radially eject the debris, which can effectively prevent the debris from being repeatedly rolled in the cutting area, avoiding the increase in cutting resistance and tool wear caused by debris accumulation, and improving the cutting quality and the service life of the tool. The diameter of the first cutting knife 1121 is larger than that of the second cutting knife 1122. The first cutting knife 1121 can handle larger macroscopic obstacles, while the second cutting knife 1122 can handle smaller microscopic obstacles, improving the adaptability and reliability of the tool.

[0041] The present invention and its embodiments have been described above. Such description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural forms and embodiments without creative work without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A cutting device for large-diameter pipeline production, comprising a cutting part and a supporting part, characterized in that: The supporting part includes a first supporting component, a second supporting component, and a supporting cylinder. The cutting part is located on the supporting cylinder to cut the pipe diameter. The second supporting component and the supporting cylinder are located at both ends of the supporting cylinder to support the supporting cylinder. The cutting part includes a cutting component and an adjusting component. The cutting component cuts the pipe. A counterweight part corresponding to the cutting component is provided on the supporting cylinder. The counterweight part includes a plurality of counterweight units, a second towing rope, and a driving roller shaft. The plurality of counterweight units are connected in series on the second towing rope, and the driving roller shaft drives the plurality of counterweight units to counterweight the cutting component. The counterweight unit includes a plurality of counterweight balls. The plurality of counterweight balls are arranged and combined. Electromagnets corresponding to the counterweight units are provided at the inlet and outlet of the cutting component. The electromagnets adsorb the counterweight units to apply a gradient magnetic field in the same direction as the moving direction, and repel them to form a virtual stop surface. The electromagnets perform non-contact magnetic buffering on the counterweight units.

2. A cutting device for the production of large-diameter pipes according to claim 1, characterized in that: The counterweight unit includes a plurality of first counterweight balls. The plurality of first counterweight balls are linearly distributed in a circle on the second towing rope. The first counterweight balls enter the inside of the cutting component and slide to offset the torque generated by the centrifugal force, maintaining the dynamic balance of the cutting component.

3. A cutting device for the production of large-diameter pipes according to claim 1, characterized in that: The counterweight unit includes a plurality of second counterweight balls and third counterweight balls. The plurality of second counterweight balls and third counterweight balls are linearly staggered on the second towing rope. The second towing rope is connected end to end to form a ring. The driving roller shaft drives the second counterweight balls and third counterweight balls to move in a cycle inside the cutting component, obtaining a stepped mass increment and realizing continuous fine adjustment of the mass.

4. A cutting device for the production of large-diameter pipes according to claim 3, characterized in that: The counterweight part further includes a plurality of fourth counterweight balls. The plurality of fourth counterweight balls are located at the head and tail of the counterweight unit to space between two adjacent counterweight units. The fourth counterweight balls are filled with magnetic powder, and the electromagnets adsorb and repel the fourth counterweight balls.

5. A cutting device for the production of large-diameter pipes according to claim 1, characterized in that: The counterweight part further includes a counterweight sleeve. The counterweight sleeve is connected end to end to form a ring. The counterweight sleeve covers the second towing rope and the counterweight unit. An airbag is provided inside the counterweight sleeve to squeeze and cover the plurality of counterweight units. A magnetic ring corresponding to the electromagnet is provided on the outer wall of the counterweight sleeve.

6. The cutting device for large-diameter pipeline production according to claim 1, wherein: The cutting component includes a cutting arm and a cutting tool group. The cutting arm is hinged to the supporting cylinder. The cutting arm is angle-adjusted through the adjusting component. A cutting block is provided on the cutting arm to cut the pipe through the cutting block.

7. A cutting device for large-diameter pipe production according to claim 1, characterized in that: The adjusting component includes a second roller screw and a third sleeve. The thread directions at both ends of the second roller screw are opposite. The third sleeve is located at both ends of the second roller screw and is threadedly connected to the second roller screw. The third sleeve is connected to the cutting arm through a first towing rope to adjust the angle of the cutting arm.

8. A cutting device for the production of large-diameter pipes according to claim 1, characterized in that: The first supporting component includes a first sleeve and a second sleeve. The first supporting component is connected to the supporting cylinder through a first roller screw. The first sleeve is threadedly connected to the first roller screw. A first supporting arm and a second supporting arm are respectively provided on the first sleeve and the second sleeve. The first supporting arm and the second supporting arm are hinged to each other. The first supporting arm is hinged to the first sleeve, and the second supporting arm is fixedly connected to the second sleeve.

9. The cutting device for large-diameter pipe production according to claim 1, characterized in that: The second support assembly includes a fixed disk and a third support arm. The third support arm is slidably connected to the fixed disk. There are multiple third support arms, and a linkage assembly is provided between the multiple third support arms for linkage. A clamping assembly corresponding to the pipeline is provided on the third support arm. A rack is provided on the third support arm. The linkage assembly includes a first gear meshing with the rack and a second gear meshing with the first gear. The first gear corresponds to the first third support arm. The clamping assembly includes a first clamping block and a second clamping block. The first clamping block and the second clamping block are slidably connected to the third support arm. The first clamping block and the second clamping block are synchronously displaced up and down through a screw rod to generate a bidirectional clamping force.

10. A cutting method for the production of large-diameter pipes according to claim 5, characterized in that: By inserting the support cylinder into the pipeline and supporting both ends of the support cylinder through the first support assembly and the second support assembly, a symmetric support force field is formed inside the pipeline to avoid deflection caused by single-point force. The angle of the cutting assembly is adjusted through the adjustment assembly so that the cutting assembly contacts the inner wall of the pipeline. The cutting assembly is weighted through the weight unit in the weight portion to ensure that the cutting assembly maintains a stable posture during cutting, reducing energy loss and cutting resistance fluctuations caused by jitter. The weight unit drives the weight sleeve to move in the cutting assembly through the driving roller shaft. When the corresponding weight unit enters the cutting assembly, the electromagnet at the entrance of the cutting assembly is powered on and the electromagnet at the exit is powered off. The electromagnet at the entrance repels the next weight unit to form a virtual stop surface to prevent non-target weight units from entering. The exit electromagnet attracts the end of the unit that has completed weighting to prevent it from retracting into the cutting assembly. During the movement of the weight unit, the electromagnet applies a gradient magnetic field in the same direction as the movement direction to reduce the frictional resistance of the second traction rope. Combining the magnetic adsorption characteristics of the magnetic ring, stepless virtual mass adjustment is achieved, breaking through the limitations of traditional weight adjustment, enabling more precise and continuous weight adjustment, and improving the adaptability of the cutting device to different cutting conditions.

Images