A laser pipe cutting device for cutting large-diameter pipes

Abstract

This invention belongs to the field of large-diameter pipe cutting and blanking technology, and discloses a laser pipe cutting device for large-diameter pipe cutting. The device includes a laser pipe cutting machine body, a support rail at the bottom of the machine body, and carrying trolleys on both sides of the support rail. A four-jaw chuck is fixedly installed on each carrying trolley, holding the pipe body; and a bottom support center component. This invention constructs a continuous material feeding path from the cutting station to the external transport vehicle through the progressive connection and cooperation of the bottom support center component, the center of gravity transition component, and the carrying receiving component. This completely replaces the traditional overhead crane lifting method, eliminates production interruptions caused by manual lifting, and matches the material feeding cycle with the laser pipe cutting machine's cutting rhythm of one pipe per minute. This fundamentally solves the capacity bottleneck of large-tonnage pipe cutting, while avoiding the risk of secondary collisions caused by frequent overhead crane entry and exit from the work area, significantly improving the continuity and safety of the production process.

Description

Technical Field

[0001] This invention belongs to the field of large-diameter pipe cutting and blanking technology, specifically a laser pipe cutting device for cutting large-diameter pipes. Background Technology

[0002] Currently, large-diameter round pipes are widely used in oil and gas, marine engineering, and chemical industries. These pipes often have a wall thickness of 30-40mm, and a single 12-meter pipe can weigh 2-3 tons. When using a laser pipe cutter to cut the pipes to a fixed length, bevel, or intersecting line, the unloading process after the metal pipe is cut is one of the most dangerous parts of the entire equipment. Given the extremely heavy weight of large-diameter, thick-walled pipes, it is strictly forbidden to use violent methods such as flipping or free rolling during on-site unloading. Therefore, overhead cranes are commonly used for unloading. The overhead crane uses flexible suspension with wire ropes, frequency conversion micro-motion of the winch, and synchronous lifting at multiple points to lower the pipe to the receiving position. This is the conventional method in the field of unloading large-tonnage pipes. However, overhead crane hoisting requires dedicated personnel and takes 5-10 minutes per operation. Its cycle time is seriously mismatched with the cutting rhythm of the pipe cutter (3-5 minutes per pipe), becoming a bottleneck for the entire production line. In addition, the frequent entry and exit of the overhead crane into the work area also brings the risk of secondary collisions.

[0003] A search revealed that Chinese Patent CN120055572A discloses a laser pipe cutting machine for cutting large-diameter pipes. The machine includes a horizontal foundation, a machine body on one side of the foundation, a laser cutting device on the machine body, side frames on one side of both ends of the machine body, two parallel guide rail grooves on the horizontal foundation between the side frames, two corresponding guide rail frames within the guide rail grooves, V-shaped rails at the top of the guide rail frames, a load-bearing transport vehicle above both ends of the guide rail frames, a hydraulic telescopic column above the load-bearing transport vehicle, a fixed shaft seat at the top of the hydraulic telescopic column, a rotary motor inside the fixed shaft seat, and a double-layer clamping device at the top of the rotary motor's rotating shaft. An adjustable material rack corresponding to the machine body is located on the other side of the horizontal foundation. The advantages of this invention are: adaptability to pipe processing of various diameters, further improvement of production continuity, reduction of the possibility of human error, improved cutting accuracy and stability, simple overall structure for easy installation, and effective saving of equipment costs. While the aforementioned technical solutions adapt to multi-diameter processing through separate carrying trolleys and double-layer clamping, they lack a dedicated slow-release mechanism for large-tonnage pipes during the unloading stage. After cutting, the heavy-duty transport vehicle can only carry the pipe to the end, and subsequent crane lifting by workers is still required. The continuity of automated production is forcibly interrupted by the manual lifting stage, forcing the entire line into a stagnant state of waiting for lifting and unloading. This results in insufficient adaptability of laser cutting equipment to unloading large-diameter, thick-walled round pipes under heavy load conditions, and also causes the pipe cutting cycle to become disconnected from the unloading cycle, making it impossible to automatically and continuously unload large-diameter pipe sections without human intervention. Therefore, a laser pipe cutting device for large-diameter pipe cutting is proposed to solve the aforementioned problem of the interruption in automated unloading. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a laser pipe cutting device for cutting large-diameter pipes, including a laser pipe cutting machine body, a support rail at the bottom of the laser pipe cutting machine body, a carrying trolley on both sides of the support rail, a four-jaw chuck fixedly installed on the carrying trolley, and a pipe body clamped on the four-jaw chuck. The bottom support center component is set on the support rail and is used to support the tube body during cutting and to play an initial role in the center of gravity transition during material feeding. The bottom support center component includes a support box, which is slidably connected to a support rail. The support box is equipped with a support center wheel, and the top of the support box is equipped with a center of gravity transition wheel for supporting the bottom of the tube body. The right side of the center of gravity transition wheel is equipped with an auxiliary support wheel for limiting the bottom of the tube body. A center of gravity transition component is provided on the left side of the support box to distribute the transition of the tube body and prevent the center of gravity of the tube body from concentrating in one place. The center of gravity transition component includes an auxiliary limiting wheel. A side center of gravity auxiliary wheel and a transfer center of gravity wheel are arranged sequentially on the left side of the auxiliary limiting wheel. A support component is provided on the support box. A hydraulic cylinder for driving the support component is fixedly installed inside the support box. An external transport vehicle, on which a fixing box is fixedly installed; A receiving component is provided on a fixed box to carry the cut tube body that has been transferred from the center of gravity transition component and transport it to the center of the fixed box. The material release device is installed on the fixed box and is used to position and release the center of gravity of the tube body during the reception of the receiving component, so as to prevent the tube body from undergoing secondary displacement on it.

[0005] Preferably, the bottom support center component further includes a support center rod, which is rotatably connected inside the support center wheel. The bottom of the support center wheel is provided with a mounting plate, and the support center rod is movably connected to the mounting plate. The support center wheel is in contact with the tube body.

[0006] Preferably, the support includes a connecting seat, which is fixedly mounted on a hydraulic cylinder. The center of gravity transition wheel, auxiliary support wheel, auxiliary limit wheel, side center of gravity auxiliary wheel, and transfer center of gravity wheel are all movably connected to a support rod, which is movably connected to the connecting seat. The bottom of the connecting seat is fixedly mounted to the telescopic end of the hydraulic cylinder.

[0007] Preferably, the receiving component includes a side receiving wheel, a central transfer wheel is provided on the left side of the side receiving wheel, and a side auxiliary wheel is provided on the left side of the central transfer wheel. The side receiving wheel, the central transfer wheel, and the side auxiliary wheel are all rotatably connected to a second support rod. The outside of the second support rod is rotatably connected to a second connecting seat through a bearing seat. The inside of the fixed box is fixedly installed with a second hydraulic cylinder. The second connecting seat is fixedly installed on the second hydraulic cylinder. The fixed box provides distributed support for the center of the received tube through a fixed bearing component.

[0008] Preferably, the fixed bearing component includes a fixed load-bearing wheel, a thick rod is rotatably connected inside the fixed load-bearing wheel, and a material drop seat is movably connected to the outer end of the thick rod, the material drop seat being fixedly mounted on the hydraulic cylinder.

[0009] Preferably, both the support box and the fixing box are provided with support bearing openings, and both the first connecting seat and the second connecting seat are located inside the support bearing openings.

[0010] Preferably, a stop block is fixedly connected to the first connecting seat, and the stop block is slidably connected to the support box; a stop block is fixedly connected to the second connecting seat, and the stop block is slidably connected inside the fixed box.

[0011] Preferably, the material release component includes a release box, a sliding block is slidably connected inside the release box, a disc spring is fixedly connected to one side of the sliding block, the other side of the disc spring is connected to the side wall of the release box, a force plate is fixedly connected to the sliding block, and a release wheel is rotatably connected to the inner side of the force plate.

[0012] Preferably, a geared motor is fixedly installed at the bottom of the support box, a drive gear is fixedly connected to the output end of the geared motor, a toothed plate is fixedly installed on the support rail, and the drive gear meshes with the toothed plate.

[0013] Preferably, a stepper motor is fixedly installed inside the fixed box, and two sets of drive rods are laterally movably connected inside the fixed box. A linkage protective plate is fixedly connected to the surface of each set of drive rods. A worm gear is fixedly connected to each set of drive rods, and a worm is drivenly connected to each worm gear. The worm is rotatably connected to the inside of the fixed box through a bearing. The output end of the stepper motor is synchronously driven to the two worms through a bevel gear set.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention constructs a continuous material unloading and transfer path from the cutting station to the external transport vehicle through the progressive connection and cooperation of the bottom support center component, the center of gravity transition component, and the load-bearing receiving component. It completely replaces the traditional overhead crane unloading method, eliminates production interruptions caused by manual hoisting, and matches the unloading rhythm with the cutting rhythm of the laser tube cutting machine. It fundamentally solves the production capacity bottleneck of unloading large-tonnage pipes, while avoiding the risk of secondary collisions caused by frequent entry and exit of the overhead crane into the work area, and significantly improves the continuity and safety of the production process.

[0015] Furthermore, based on achieving automated continuous feeding, this invention adopts a multi-wheel group distributed load-bearing and graded slow-release structure. The center of gravity of the pipe is transferred step by step through multiple points such as the center of gravity transition wheel, the side center of gravity auxiliary wheel, and the transfer center of gravity wheel. With the auxiliary unloading design of the support bearing port and the side load distribution structure of the first and second stops, the weight of the cut pipe is distributed step by step to the support box and the fixed box, which significantly reduces the load on a single hydraulic cylinder one and hydraulic cylinder two. At the same time, the disc spring buffer mechanism of the feeding slow-release component eliminates the micro-inertial impact of the pipe falling, avoids pipe collision deformation and rigid impact of equipment, and ensures the stability of the feeding process under heavy-duty conditions.

[0016] Furthermore, based on the aforementioned automated and stable material feeding, the worm gear transmission structure driven by the stepper motor can drive two sets of linked protective plates to rotate synchronously in opposite directions, and abut and limit them from both ends of the tube. Combined with the radial support of the fixed load-bearing wheel and the lateral constraint of the release wheel, they together form a radial anti-roll and axial anti-slip limiting system to prevent the risk of slippage and slippage during the tube transfer process. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front view schematic diagram of the support center component of the present invention; Figure 3 This is a schematic diagram illustrating the sequential transfer of the tube's center of gravity by the bottom support center component, the center of gravity transition component, and the load-bearing receiving component of the present invention. Figure 4 This is a three-dimensional schematic diagram of the center-of-gravity transition component of the present invention; Figure 5 This is a three-dimensional schematic diagram of the linkage protection plate of the present invention; Figure 6 This is a three-dimensional schematic diagram of the material release mechanism of the present invention.

[0018] In the diagram: 1. Laser tube cutting machine body; 2. Support rail; 4. Carrying trolley; 5. Four-jaw chuck; 6. Tube body; 7. Bottom support center component; 71. Support center wheel; 72. Center of gravity transition wheel; 73. Auxiliary support wheel; 74. Support center rod; 75. Mounting plate; 76. Support box; 8. Center of gravity transition component; 81. Auxiliary limit wheel; 82. Side center of gravity auxiliary wheel; 83. Transfer center of gravity wheel; 84. Support component; 841. Connecting seat one; 842. Support rod one; 85. Hydraulic cylinder one; 9. External transport vehicle; 10. Fixing box; 11. Carrying receiving component; 111. Side receiving wheel; 112. Central transfer. 113. Side auxiliary wheel; 114. Support rod two; 115. Connecting seat two; 116. Hydraulic cylinder two; 117. Fixed bearing component; 1171. Fixed load-bearing wheel; 1172. Thick rod; 1173. Material drop seat; 12. Material drop slow-release component; 121. Slow-release box; 122. Sliding block; 123. Disc spring; 124. Force plate; 125. Slow-release wheel; 13. Support bearing port; 14. Stop block one; 15. Stop block two; 16. Gear motor; 17. Drive gear; 18. Gear plate; 19. Stepper motor; 20. Drive rod; 21. Linkage protection plate; 22. Worm gear; 23. Worm. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 6 As shown, the present invention provides a laser pipe cutting device for cutting large-diameter pipes, including a laser pipe cutting machine body 1. The device is characterized in that a support rail 2 is provided at the bottom of the laser pipe cutting machine body 1, and a carrying trolley 4 is provided on both sides of the support rail 2. A four-jaw chuck 5 is fixedly installed on the carrying trolley 4, and a pipe body 6 is clamped on the four-jaw chuck 5. The bottom support center piece 7 is set on the support rail 2 and is used to support the tube body 6 during cutting and to play an initial role in the center of gravity transition during material feeding. Among them, the bottom support center component 7 includes a support box 76, which is slidably connected to the support rail 2. The support box 76 is provided with a support center wheel 71. The top of the support box 76 is provided with a center of gravity transition wheel 72 for supporting the bottom of the tube body 6, and the right side of the center of gravity transition wheel 72 is provided with an auxiliary support wheel 73 for limiting the bottom of the tube body 6. The center of gravity transition component 8 is located on the left side of the support box 76. It serves to distribute the transition of the tube body 6 and prevent the center of gravity of the tube body 6 from being concentrated in one place. Among them, the center of gravity transition component 8 includes an auxiliary limiting wheel 81, and a side center of gravity auxiliary wheel 82 and a transfer center of gravity wheel 83 are arranged sequentially on the left side of the auxiliary limiting wheel 81. A support component 84 is provided on the support box 76, and a hydraulic cylinder 85 for driving the support component 84 is fixedly installed inside the support box 76. External transport vehicle 9, with a fixed box 10 fixedly installed on external transport vehicle 9; The carrier receiving component 11 is mounted on the fixed box 10 and is used to carry the cut tube body 6 that is transferred from the center of gravity transition component 8 and transport it to the center of the fixed box 10. The material release component 12 is installed on the fixed box 10 and is used to position the center of gravity of the tube 6 received by the receiving component 11, so as to prevent the tube 6 from undergoing secondary displacement on it. Specifically, during loading, the tube body 6 is inserted into both ends of the tube body 6 by the four-jaw chucks 5 on the two side trolleys 4, clamping and fixing the tube body 6 from the inside of the tube wall in an inward expansion manner. Then, it is moved to the support rail 2 for placement and then cut by the laser tube cutting machine 1. When the laser tube cutting machine 1 cuts, the four-jaw chucks 5 drive the tube body 6 to rotate synchronously. The bottom of the tube body 6 is supported by the bottom support center piece 7 on multiple support boxes 76. The support center wheel 71 rolls with the tube body 6 as it rotates. After cutting, the cut tube body 6 is left on the bottom support center piece 7 and the center of gravity transition piece 8 of the support box 76. No crane lifting is required. The unloading and handover to the external transport vehicle 9 is completed directly through the step-by-step center of gravity transfer of the multi-wheel group. The whole machine uses a programmable logic controller as the main control unit. The four-jaw chuck 5 rotates, the support box 76 moves, and all hydraulic cylinders 85 and 116 are driven by the rotation of the four-jaw chucks 5, the support box 76 moves, and all hydraulic cylinders 85 and 116 are driven by the rotation of the four-jaw chucks 5. The lifting and lowering mechanism, the stepper motor 19 limit switch, and the laser cutting system are all connected to the PLC for unified scheduling, realizing the automated and coordinated operation of the entire process of cutting, transferring, and unloading. This fundamentally breaks down the automated connection between cutting and unloading, matching the production rhythm of the laser tube cutting machine 1. In the initial stage of unloading, the center weight of the tube 6 is first concentrated on the support center wheel 71, which is supported by the support box 76, preparing for the subsequent center of gravity transfer. Multiple hydraulic cylinders 85 can apply thrust and bear the weight of the tube 6, and are distributed and supported by the center of gravity transition wheel 72, auxiliary support wheel 73, auxiliary limit wheel 81, side center of gravity auxiliary wheel 82, and transfer center of gravity wheel 83. Among them, the auxiliary support wheel 73 abuts against the bottom right side of the tube 6, mainly playing a limiting role for the tube 6, and pushes from the bottom right side during the unloading of the tube 6, so that the weight of the tube 6 is successively unloaded to the left.

[0021] like Figures 1 to 6 As shown, the bottom support center component 7 also includes a support center rod 74, which is rotatably connected inside the support center wheel 71. The bottom of the support center wheel 71 is provided with a mounting plate 75, and the support center rod 74 is movably connected to the mounting plate 75. The support center wheel 71 is in contact with the tube body 6.

[0022] Specifically, the central weight of the tube body 6 is concentrated on the support center wheel 71, the support center rod 74, and the mounting plate 75, and then borne by the support box 76. The support center wheel 71, as the core support fulcrum of the cutting station, is directly attached to the bottom outer wall of the tube body 6. The rotation of the support center wheel 71 enables the tube body 6 to follow the rotation. The mounting plate 75 evenly transmits the load of the support center wheel 71 to the support box 76 below. This ensures that the radial runout of the tube body 6 is controllable during the cutting process, improves the cutting quality of the intersection line and the bevel, and serves as the starting reference point for the transfer of the center of gravity of the entire tube body 6. It forms a high-low connection with the center of gravity transition wheel 72 on the left, providing stable initial support for the subsequent gradual transition of the center of gravity.

[0023] like Figures 1 to 6 As shown, the support member 84 includes a connecting seat 841, which is fixedly installed on the hydraulic cylinder 85. The center of gravity transition wheel 72, the auxiliary support wheel 73, the auxiliary limit wheel 81, the side center of gravity auxiliary wheel 82, and the transfer center of gravity wheel 83 are all movably connected to the support rod 842. The support rod 842 is movably connected to the connecting seat 841. The bottom of the connecting seat 841 is fixedly installed with the telescopic end of the hydraulic cylinder 85.

[0024] Specifically, the center-of-gravity transition wheel 72, auxiliary support roller 73, auxiliary limit wheel 81, side center-of-gravity auxiliary wheel 82, and transfer center-of-gravity wheel 83 are connected to hydraulic cylinders 85 via connecting seat 841 and support rod 842. This allows the two hydraulic cylinders at the bottom of each connecting seat 841 to apply thrust and bear the weight of the tube 6, which is distributed and supported by the center-of-gravity transition wheel 72, auxiliary support roller 73, auxiliary limit wheel 81, side center-of-gravity auxiliary wheel 82, and transfer center-of-gravity wheel 83. Each set of hydraulic cylinders 85 is independently controlled by a PLC through an electromagnetic reversing valve, which can precisely adjust the lifting height and start / stop rhythm according to the preset feeding sequence. When feeding starts, the PLC outputs a signal to control the hydraulic cylinder 85 corresponding to the right auxiliary support roller 73 to lift first, applying an upward thrust from the bottom right end of the tube 6, pushing the center of gravity of the tube 6 to gradually shift to the left center-of-gravity transition wheel 72. When the center of gravity of the tube 6 falls to the center-of-gravity transition wheel 72, the PLC controls the auxiliary support roller 73 on the right and the auxiliary support roller 74 on the left. The limiting wheel 81 and its corresponding hydraulic cylinder 85 maintain a lifting state synchronously, forming a three-point support layout. The auxiliary support wheel 73 consists of two sets, and the lifting path can be selected according to the diameter of the pipe body 6, distributing the weight of the large-tonnage pipe body 6 to the three wheel sets for joint support, avoiding overload of a single set of hydraulic cylinders 85. As the center of gravity of the pipe body 6 continues to shift to the left, when each stage of the wheel set is the main support point, its left and right adjacent wheel sets maintain a lifting and supporting state, maintaining a force structure with at least three points of support throughout the process, ensuring that the center of gravity does not drop sharply and there is no single-point overload. The PLC sequentially controls the hydraulic cylinders 85 corresponding to the auxiliary limiting wheel 81, the side center of gravity auxiliary wheel 82, and the transfer center of gravity wheel 83 to lift and connect to the bearing, ensuring that when each stage of the main support wheel is bearing, its left and right adjacent wheel sets maintain a supporting state, always maintaining at least three points of support. This ensures that there is no sharp drop or impact during the transfer of the center of gravity, and also significantly reduces the peak load of a single set of hydraulic cylinders 85 through multi-point distributed bearing, adapting to the heavy-load unloading conditions of large-diameter thick-walled pipes.

[0025] like Figures 1 to 6 As shown, the receiving component 11 includes a side receiving wheel 111, a central transfer wheel 112 is provided on the left side of the side receiving wheel 111, and a side auxiliary wheel 113 is provided on the left side of the central transfer wheel 112. The side receiving wheel 111, the central transfer wheel 112 and the side auxiliary wheel 113 are all rotatably connected to a second support rod 114. The outside of the second support rod 114 is rotatably connected to a second connecting seat 115 through a bearing seat. The fixed box 10 is fixedly installed with a second hydraulic cylinder 116. The second connecting seat 115 is fixedly installed on the second hydraulic cylinder 116. The fixed box 10 provides distributed support for the center of the received tube 6 through a fixed bearing component 117.

[0026] Specifically, both the rod-side and rodless-side oil circuits of hydraulic cylinder 85 and hydraulic cylinder 116 are equipped with relief valves. The opening pressure of the relief valves is set to 1.1 to 1.3 times the system working pressure. The cut pipe body 6, which is supported by the transfer center of gravity wheel 83, is received by the side receiving wheel 111. The center of gravity of the pipe body 6, which is mainly supported by the transfer center of gravity wheel 83 on the support box 76, is gradually transferred to the side receiving wheel 111 under the push of the side center of gravity auxiliary wheel 82. After the transition by the side receiving wheel 111, the center of gravity of the pipe body 6 is transferred from the side receiving wheel 111 to the central transfer wheel 112 under the lifting of the transfer center of gravity wheel 83. The geared motor 16 of the support box 76 is equipped with a position sensor, and the positioning signal is fed back to the PLC in real time. When the support box 76 moves to a position that is precisely aligned with the external transport vehicle 9, the PLC synchronously triggers the hydraulic cylinder 116 on the fixed box 10 to operate in sequence, forming a linkage with the hydraulic cylinder 85 on the support box 76 to ensure the equal height connection between the side receiving wheel 111 and the transfer center of gravity wheel 83. When the center of gravity of the pipe body 6 is transferred from the transfer center of gravity wheel 83 to the side receiving wheel 111, the PLC controls the side receiving wheel 111 and the side center of gravity auxiliary wheel 82 to support the pipe body 6 synchronously from the left and right sides, forming a three-point support transition, eliminating the risk of the center of gravity falling due to the gap between the support box 76 and the external transport vehicle 9. The hydraulic cylinders 85 and 116 are equipped with pressure sensors, which can collect load data in real time and feed it back to the PLC, forming a dual overload protection of electrical and hydraulic systems with the overflow valve. Instantaneous load impacts can be automatically relieved by the overflow valve, or buffered by the PLC adjusting the lifting speed of hydraulic cylinders 85 and 116 in real time to prevent damage to hydraulic cylinders 85 and 116 due to instantaneous overload. The load impact during the shift of the center of gravity can be automatically relieved by the overflow valve, or buffered by the PLC adjusting the lifting speed of hydraulic cylinders 85 and 116 in real time to prevent damage to hydraulic cylinders 85 and 116 due to instantaneous overload. After the center of gravity of the tube body 6 is transferred to the central transfer wheel 112, the PLC controls the side receiving wheel 111 and the fixed load-bearing wheel 1171 to maintain the auxiliary support on both sides, ensuring the initial stability of the tube body 6 on the fixed box 10. No crane hoisting assistance is required throughout the process, realizing seamless automated handover from the cutting station to the external transport vehicle 9, greatly reducing the single-piece cutting time and matching the cutting rhythm of the laser tube cutting machine body 1.

[0027] like Figures 1 to 6 As shown, the fixed bearing component 117 includes a fixed load-bearing wheel 1171, a thick rod 1172 is rotatably connected inside the fixed load-bearing wheel 1171, and a material drop seat 1173 is movably connected to the outer end of the thick rod 1172. The material drop seat 1173 is fixedly installed on the hydraulic cylinder 116.

[0028] Specifically, the thick rod 1172 adopts a large-diameter solid structure, which can significantly improve the radial load-bearing capacity and bending resistance of the fixed load-bearing roller 1171, avoid the shaft from bending under heavy load, and ensure the structural reliability and support stability of 2-3 ton pipes during long-term transportation. The fixed load-bearing roller 1171 can support the pipe body 6 on the external transport vehicle 9 from two points. The fixed load-bearing roller 1171 can actively push and support the pipe body 6 on the drop seat 1173 by the hydraulic cylinder 116, and passively support it after falling into the support bearing port 13 on the fixed box 10. During the process of the center of gravity shifting from the central transfer wheel 112 to the fixed load-bearing roller 1171, the PLC controls the fixed load-bearing roller 1171. The hydraulic cylinder 116 corresponding to the heavy roller 1171 actively lifts and meets the bottom of the pipe body 6, replacing passive support with active material receiving, which greatly reduces the height difference and impact load of the center of gravity transfer. After the center of gravity of the pipe body 6 falls completely onto the two sets of fixed load-bearing rollers 1171, the PLC controls the hydraulic cylinder 116 to drive the material drop seat 1173 to fall back synchronously, so that the fixed load-bearing roller 1171 turns into a state of passive support by the main body of the fixed box 10, and transfers the entire weight of the pipe body 6 to the fixed box 10 through the material drop seat 1173, completely unloading the continuous load of the hydraulic cylinder 116. The layout of two-point symmetrical support can also ensure that the radial force of the pipe body 6 is balanced during the transfer of the external transport vehicle 9, avoiding the risk of overturning caused by unilateral load.

[0029] like Figures 1 to 6 As shown, both the support box 76 and the fixing box 10 are provided with support bearing ports 13, and the connecting seat 1 841 and the connecting seat 2 115 are located inside the support bearing ports 13.

[0030] Specifically, the support bearing port 13 actively provides auxiliary support to each of the connecting seats 841 and 115 after they fall into it. This distributes the weight borne by each connecting seat 841 and 115 into the support bearing port 13, depending on the support box 76 and the external transport vehicle 9, onto the fixing box 10. When the PLC-controlled hydraulic cylinder 85 drives the connecting seat 841 to fall back... When in the lowest position, the bottom surface and side wall of the connecting seat 841 are directly attached to the inner wall of the support bearing port 13, so that the vertical load of the pipe body 6 is directly transmitted to the equipment base through the support box 76 and the fixed box 10 structure. The hydraulic cylinder 85 and the hydraulic cylinder 116 only play a driving role and do not need to bear heavy loads for a long time, which significantly extends the service life of the hydraulic components. The side wall of the support bearing port 13 can also play a lateral guiding and limiting role for the connecting seat 841 and the connecting seat 115, and counteract the lateral component force caused by the shift of the center of gravity of the pipe body 6.

[0031] like Figures 1 to 6As shown, a stop block 14 is fixedly connected to a connecting seat 841, and the stop block 14 is slidably connected to the support box 76. A stop block 2 15 is fixedly connected to a connecting seat 115, and the stop block 2 15 is slidably connected inside the fixed box 10.

[0032] Specifically, stop block 14 slides on the support box 76, strengthening the lateral bearing capacity of the hydraulic cylinder 85 at the bottom of the connecting seat 841, preventing the hydraulic cylinder 85 from bearing the center of gravity load alone during the lifting process. Stop block 14 distributes the center of gravity load on the extension end of the hydraulic cylinder 85 to the support box 76, thus distributing the lateral bearing capacity of the support. Stop block 2 slides on the fixed box 10, strengthening the lateral bearing capacity of the hydraulic cylinder 116 at the bottom of the connecting seat 115, preventing the hydraulic cylinder 116 from bearing the center of gravity load alone during the lifting process. Stop block 2 15 distributes the center of gravity load on the extension end of the hydraulic cylinder 116 to the fixed box 10, thus distributing the lateral bearing capacity of the support. Stop blocks 14 and 2 15 slide vertically along the interior of the support box 76 and the fixed box 10, respectively, between the hydraulic cylinder 85 and the hydraulic cylinder 116. During the lifting process, cylinder 116 provides lateral guidance and load sharing for connecting seat 841 and connecting seat 115. When the center of gravity of the heavy-duty pipe 6 shifts, eccentric forces are easily generated, causing the piston rods of hydraulic cylinders 85 and 116 to bear radial bending moments. Stop blocks 14 and 15 can directly transmit this lateral force to the side walls of the support box 76 and the fixed box 10. Working in conjunction with the synchronous lifting control of the PLC, this prevents piston rod deformation or seal wear, improving the operational stability and durability of the hydraulic lifting system. Simultaneously, stop blocks 14 and 15, together with the side walls of the support bearing port 13, form a multi-stage side-limiting structure. Even under extreme conditions of eccentric material dropping of the pipe 6, this ensures that connecting seat 841 and connecting seat 115 do not shift laterally, ensuring that the wheel assembly always remains perpendicular to the axis of the pipe 6, guaranteeing the reliability of support during heavy-load material dropping.

[0033] like Figures 1 to 6 As shown, the material release mechanism 12 includes a release box 121. A sliding block 122 is slidably connected inside the release box 121. A disc spring 123 is fixedly connected to one side of the sliding block 122. The other side of the disc spring 123 is connected to the side wall of the release box 121. A force plate 124 is fixedly connected to the sliding block 122. A release wheel 125 is rotatably connected to the inner side of the force plate 124.

[0034] Specifically, the slow-release wheel 125, supported by the force plate 124, bears the micro-inertial impact force when the tube 6 falls onto the two fixed load-bearing wheels 1171. The sliding block 122, elastically supported by the disc spring 123, bears the micro-inertial impact force after the tube 6 contacts the slow-release wheel 125 and applies a reaction force, thus eliminating the micro-inertial impact force on the tube 6 and allowing the tube 6 to fall stably onto the two fixed load-bearing wheels 1171. The slow-release wheel 125 is attached to the side of the tube 6. When the tube 6 falls onto the fixed load-bearing wheels 1171 and generates a small rolling inertia, it first contacts the slow-release wheel 125. The rolling impact force is transmitted through the force plate 124 to... The sliding block 122 compresses the disc spring 123 to generate elastic deformation, converting kinetic energy into elastic potential energy for absorption and dissipation. The high stiffness of the disc spring 123 can provide a large buffer force with a small amount of deformation, which is suitable for the heavy-load impact of large-tonnage pipes, while avoiding excessive buffer stroke that could cause the pipe body 6 to deviate. After the impact is eliminated, the rebound reaction force of the disc spring 123 can push the pipe body 6 back to the center position of the two sets of fixed load-bearing wheels 1171. Together with the side auxiliary wheel 113 on the left and the central transfer wheel 112, they form a radial anti-roll limit, avoiding the risk of the pipe body 6 rolling and slipping during transportation, and further improving the safety of unmanned unloading and transfer.

[0035] like Figures 1 to 6 As shown, a geared motor 16 is fixedly installed at the bottom of the support box 76, and a drive gear 17 is fixedly connected to the output end of the geared motor 16. A toothed plate 18 is fixedly installed on the support rail 2, and the drive gear 17 and the toothed plate 18 mesh with each other.

[0036] Specifically, the drive gear 17, driven by the geared motor 16, rotates and, through the meshing force of the gear plate 18, drives the support box 76 to move automatically on the support track 2. Multiple sets of sliding rollers are also connected to the bottom of the support box 76, contacting the top of the support track 2, allowing the support box 76 to slide more smoothly on the track 2 and move the cut tube 6. The operation of the geared motor 16 is controlled by a PLC. The meshing transmission between the drive gear 17 and the gear plate 18 features high positioning accuracy and strong load-bearing capacity. Combined with a position sensor, it can precisely control the spacing and stopping position of multiple support boxes 76, adapting to various applications. The system meets the requirement of segmented cutting of pipes of the same length (6). The low-speed, high-torque characteristics of the geared motor 16 ensure that the support box 76 can start and stop smoothly without slippage or jerking when carrying heavy pipes. The bottom sliding rollers can share the vertical load of the support box 76, reduce the meshing pressure between the drive gear 17 and the toothed plate 18, and reduce the moving resistance, thus improving the smoothness of the support box 76's operation. Multiple support boxes 76 can move synchronously or independently under PLC control according to the number of segments to be cut into of the pipe body 6, transporting the cut pipe segments one by one to the unloading station to connect with the external transport vehicle 9, realizing the fully automated connection of cutting, transfer, and unloading processes, perfectly matching the cutting rhythm of the laser pipe cutting machine 1, and eliminating the production capacity bottleneck in the unloading process.

[0037] like Figures 1 to 6 As shown, a stepper motor 19 is fixedly installed inside the fixed box 10. Two sets of drive rods 20 are laterally movably connected inside the fixed box 10. A linkage protective plate 21 is fixedly connected to the surface of each set of drive rods 20. A worm gear 22 is fixedly connected to each set of drive rods 20. A worm 23 is drivenly connected to each worm gear 22. The worm 23 is rotatably connected to the inside of the fixed box 10 through a bearing. The output end of the stepper motor 19 is synchronously driven to the two worms 23 through a bevel gear set.

[0038] Specifically, a stepper motor 19 drives a bevel gear transmission. A small bevel gear that meshes with the bevel gear is fixedly connected to the worm gear 23, causing the two worm gears 23 to rotate synchronously under the control of the stepper motor 19. This, in turn, causes the two linkage protective plates 21 to rotate and adjust around the drive rod 20. After rotation, the linkage protective plates 21 are placed outside the fixed box 10 to provide axial limiting support for the two end faces of the tube body 6, preventing slippage and shaking. The stepper motor 19 is controlled by a PLC. When the tube body 6 is in position, the pressure sensor in the hydraulic cylinder 116 detects pressure fluctuations. When the pressure signal remains stable within a preset time (e.g., 1-2 seconds), and the position sensor detects that the tube body 6 has triggered the preset center limit point, the PLC determines that the tube body 6 has completely fallen. Once the fixed load-bearing wheel 1171 is in place and the shock-absorbing component has completed its impact buffering, the automatic output signal drives the stepper motor 19 to rotate, causing the linkage protective plate 21 to flip to both ends of the pipe body 6 to complete the axial limit. After the limit is in place, the PLC locks the output state of the stepper motor 19, and combined with the mechanical self-locking characteristics of the worm gear 22 and worm 23, a double limit guarantee is formed. This structure, together with the radial support of the fixed load-bearing wheel 1171 and the lateral anti-roll of the shock-absorbing wheel 125, forms a full-dimensional limit system for radial anti-roll and axial anti-movement. The pipe body 6 will not shift or slip during the transfer of the external transport vehicle 9, regardless of starting, stopping or bumping. The entire process is automatic and requires no manual operation, truly realizing fully unmanned operation of large-diameter thick-walled pipes from cutting to transfer and unloading.

[0039] The working process of the technical solution provided by this invention is as follows: During the cutting operation, the four-jaw chucks 5 of the two side-mounted trolleys 4 clamp the two ends of the tube body 6 in an inward expansion manner and drive them to rotate synchronously. Multiple support boxes 76 are distributed along the support track 2 at the bottom of the tube body 6. The support center wheel 71 of the bottom support center piece 7 is in contact with the outer wall of the tube body 6 and passively supports it, reducing the deflection of the tube body 6 due to its own weight and ensuring the accuracy of laser cutting. After the cutting is completed, the unloading process begins: the PLC controls each group of hydraulic cylinders 85 to act in sequence through the electromagnetic reversing valve. The right auxiliary support roller 73 lifts first, applying an upward thrust from the right side of the bottom of the tube body 6. The tube body 6's center of gravity gradually shifts to the left. When the center of gravity of the tube body 6 falls to the center of gravity transition wheel 72, the auxiliary support wheel 73 on its right side and the auxiliary limit wheel 81 on its left side maintain a lifting state simultaneously, forming a three-point support to distribute the load. As the center of gravity of the tube body 6 continues to move to the left, the auxiliary limit wheel 81, the side center of gravity auxiliary wheel 82, and the transfer center of gravity wheel 83 are lifted and connected to the load in sequence. Each main support wheel is supported by the adjacent wheel groups on the left and right, maintaining at least three points of support throughout the process, realizing a smooth and gradual transition of the heavy-load tube body 6, and avoiding single-point overload and steep drop in center of gravity. Subsequently, the reduction motor 16 at the bottom of the support box 76 drives the gear 17 to rotate along the toothed plate 18, causing the support box 76 to move along the support track 2 to the unloading station. The position sensor achieves precise alignment with the external transport vehicle 9. The on-board PLC on the external transport vehicle 9 and the main PLC coordinate through a wireless module. The PLC synchronously links the hydraulic cylinder 85 on the support box 76 and the hydraulic cylinder 116 on the fixed box 10, so that the transfer center of gravity wheel 83 and the side receiving wheel 111 are connected at the same height. With the double auxiliary support of the side center of gravity auxiliary wheel 82 and the central transfer wheel 112, the center of gravity of the pipe body 6 smoothly transitions from the transfer center of gravity wheel 83 to the side receiving wheel 111, and then further transfers to the central transfer wheel 112, completing the transfer of the center of gravity across equipment. The overflow valve and pressure sensor in the oil circuit form a double overload protection, which can automatically dissipate the center of gravity. The impact load is transferred momentarily; then, the fixed load-bearing roller 1171 is actively lifted under the drive of the hydraulic cylinder 116 to meet the bottom of the tube body 6 and support the center of gravity, transferring the center of gravity of the tube body 6 from the central transfer wheel 112 to the two sets of symmetrically arranged fixed load-bearing rollers 1171; after the center of gravity is stable, the hydraulic cylinder 116 drives the material drop seat 1173 to fall back, so that the fixed load-bearing roller 1171 sits in the support bearing port 13 of the fixed box 10, and is passively supported by the main body of the fixed box 10, thus unloading the long-term load of the hydraulic cylinder 116. During the positioning of the tube body 6, the side relief wheel 125 contacts the tube body 6 first, and transmits the rolling inertia to the disc spring 123 through the force plate 124 and the sliding block 122. The disc spring 123 absorbs the impact through elastic deformation and pushes the tube body 6 back to the center, which, together with the support of the fixed load-bearing roller 1171, achieves radial anti-rolling. Finally, the PLC drives the stepper motor 19 to operate, which drives the two worm gears 23 to rotate synchronously in opposite directions via bevel gear transmission. After the worm wheel 22 reduces the speed and increases the torque, it drives the two drive rods 20 to rotate in opposite directions, causing the two sets of linkage protective plates 21 to flip outward synchronously and abut against the two end faces of the tube body 6, completing the axial limit locking. Combined with the radial support and anti-roll structure, it forms a full-dimensional limit protection, thus completing the fully automatic feeding of a single section of tube. The external transport vehicle 9 can directly transfer the tube away from the site. The overall feeding rhythm matches the rhythm of the laser tube cutting machine 1.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser pipe cutting device for cutting large-diameter pipes, comprising a laser pipe cutting machine body (1), characterized in that, The bottom of the laser tube cutting machine body (1) is provided with a support rail (2), and a carrying trolley (4) is provided on both sides of the support rail (2). A four-jaw chuck (5) is fixedly installed on the carrying trolley (4), and the tube body (6) is clamped on the four-jaw chuck (5). Bottom support center piece (7), the bottom support center piece (7) is set on the support rail (2) to support the tube body (6) during cutting and to play a preliminary role in the center of gravity transition during material feeding; The bottom support center component (7) includes a support box (76), which is slidably connected to the support rail (2). The support box (76) is provided with a support center wheel (71), and the top of the support box (76) is provided with a center of gravity transition wheel (72) for supporting the bottom of the tube body (6). The right side of the center of gravity transition wheel (72) is provided with an auxiliary support wheel (73) for limiting the bottom of the tube body (6). The center of gravity transition component (8) is located on the left side of the support box (76) and is used to disperse the transition of the tube body (6) to avoid the center of gravity of the tube body (6) being concentrated in one place. The center of gravity transition component (8) includes an auxiliary limiting wheel (81), and a side center of gravity auxiliary wheel (82) and a transfer center of gravity wheel (83) are arranged sequentially on the left side of the auxiliary limiting wheel (81). A support component (84) is provided on the support box (76), and a hydraulic cylinder (85) for driving the support component (84) is fixedly installed inside the support box (76). An external transport vehicle (9) is provided with a fixed box (10) fixedly installed on it. The carrier receiving component (11) is set on the fixed box (10) for carrying the cut tube body (6) that is transferred from the center of gravity transition component (8) and transporting it to the center of the fixed box (10); Material release component (12) is installed on the fixed box (10) to release the center of gravity of the tube (6) received by the receiving component (11) and prevent the tube (6) from being displaced again.

2. The laser pipe cutting equipment for large-diameter pipe cutting according to claim 1, characterized in that: The bottom support center component (7) also includes a support center rod (74), which is rotatably connected to the inside of the support center wheel (71). The bottom of the support center wheel (71) is provided with an mounting plate (75), and the support center rod (74) is movably connected to the mounting plate (75). The support center wheel (71) is in contact with the tube body (6).

3. The laser pipe cutting equipment for cutting large-diameter pipes according to claim 1, characterized in that: The support member (84) includes a connecting seat (841), which is fixedly installed on the hydraulic cylinder (85). The center of gravity transition wheel (72), auxiliary support wheel (73), auxiliary limit wheel (81), side center of gravity auxiliary wheel (82) and transfer center of gravity wheel (83) are all movably connected to the support rod (842). The support rod (842) is movably connected to the connecting seat (841). The bottom of the connecting seat (841) is fixedly installed with the telescopic end of the hydraulic cylinder (85).

4. A laser pipe cutting device for cutting large-diameter pipes according to claim 1, characterized in that: The receiving component (11) includes a side receiving wheel (111), a central transfer wheel (112) is provided on the left side of the side receiving wheel (111), and a side auxiliary wheel (113) is provided on the left side of the central transfer wheel (112). The side receiving wheel (111), the central transfer wheel (112) and the side auxiliary wheel (113) are all rotatably connected to a second support rod (114). The outside of the second support rod (114) is rotatably connected to a second connecting seat (115) through a bearing seat. The inside of the fixed box (10) is fixedly installed with a second hydraulic cylinder (116). The second connecting seat (115) is fixedly installed on the second hydraulic cylinder (116). The fixed box (10) provides distributed support for the center of the received tube (6) through a fixed bearing component (117).

5. A laser pipe cutting device for cutting large-diameter pipes according to claim 4, characterized in that: The fixed bearing component (117) includes a fixed load-bearing wheel (1171), a thick rod (1172) is rotatably connected inside the fixed load-bearing wheel (1171), and a material drop seat (1173) is movably connected to the outer end of the thick rod (1172). The material drop seat (1173) is fixedly installed on the hydraulic cylinder (116).

6. A laser pipe cutting device for cutting large-diameter pipes according to claim 3, characterized in that: Both the support box (76) and the fixing box (10) are provided with support bearing ports (13), and the first connecting seat (841) and the second connecting seat (115) are located inside the support bearing ports (13).

7. A laser pipe cutting device for cutting large-diameter pipes according to claim 6, characterized in that: A stop block 1 (14) is fixedly connected to the first connecting seat (841), and the stop block 1 (14) is slidably connected to the support box (76). A stop block 2 (15) is fixedly connected to the second connecting seat (115), and the stop block 2 (15) is slidably connected inside the fixed box (10).

8. A laser pipe cutting device for cutting large-diameter pipes according to claim 1, characterized in that: The material release component (12) includes a release box (121), a sliding block (122) is slidably connected inside the release box (121), a disc spring (123) is fixedly connected to one side of the sliding block (122), the other side of the disc spring (123) is connected to the side wall of the release box (121), a force plate (124) is fixedly connected to the sliding block (122), and a release wheel (125) is rotatably connected to the inner side of the force plate (124).

9. A laser pipe cutting device for cutting large-diameter pipes according to claim 1, characterized in that: A geared motor (16) is fixedly installed at the bottom of the support box (76). A drive gear (17) is fixedly connected to the output end of the geared motor (16). A toothed plate (18) is fixedly installed on the support rail (2). The drive gear (17) and the toothed plate (18) mesh with each other.

10. A laser pipe cutting device for cutting large-diameter pipes according to claim 1, characterized in that: A stepper motor (19) is fixedly installed inside the fixed box (10). Two sets of drive rods (20) are movably connected laterally inside the fixed box (10). A linkage protective plate (21) is fixedly connected to the surface of each set of drive rods (20). A worm wheel (22) is fixedly connected to each set of drive rods (20). A worm (23) is driven and connected to each worm wheel (22). The worm (23) is rotatably connected to the inside of the fixed box (10) through a bearing. The output end of the stepper motor (19) is synchronously driven and connected to the two worms (23) through a bevel gear set.

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