A round tube manufacturing device for magnetic levitation transportation low vacuum pipeline
By using an extrusion and fixing structure in the round tube manufacturing device, the difficult problems of bending and welding of curved plates are solved, and an efficient and safe round tube manufacturing process is achieved.
Patent Information
- Application Number
- CN202411962747.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2044-12-30
AI Technical Summary
In the process of manufacturing round tubes for magnetic levitation transportation low-vacuum pipelines, the pre-bending of curved plates is time-consuming and labor-intensive, welding is difficult and easy to break, posing a safety hazard.
A round tube manufacturing device is used, which uses a symmetrically arranged extrusion structure and fixing structure, a hydraulic cylinder and a guide rod to extrude the arc plate into a semicircle, and uses a clamping plate and a limit plate to ensure the alignment and stability of the welding end, thereby realizing automated bending and welding.
It realizes efficient bending and welding of curved plates, reduces manual operations, improves work efficiency, and avoids the difficulty in aligning the welding ends and the potential safety hazards of collapse.
Smart Images
Figure CN119588776B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of metal pipe processing, and in particular relates to a round pipe manufacturing device for magnetic levitation transportation low vacuum pipelines. Background Art
[0002] The core of ultra-high-speed maglev low-vacuum pipeline technology lies in superconducting magnetic levitation technology and low-vacuum pipeline technology. Superconducting magnetic levitation technology uses the powerful magnetic field generated by superconducting materials at low temperatures to achieve contactless suspension and guidance of trains on the track, eliminating the friction resistance of traditional wheel-rail trains and improving operating speed and stability; low-vacuum pipeline technology extracts air from the pipeline to form a low-vacuum environment, further reducing air resistance, allowing the train to run in an environment with almost no air resistance, improving operating efficiency and speed.
[0003] Low vacuum pipes are made of multiple round pipes welded together, and each section of the pipe is welded together from two curved plates. Currently, the following deficiencies exist in the production process of round pipes:
[0004] (1) The two curved plates are formed by pre-bending flat plates. After pre-bending, the curved plates cannot reach a perfect semicircular shape. During the welding process, the two curved plates need to be manually bent with the help of tools such as jacks, hand hoists, and crowbars to bend them into a semicircular state. This process is time-consuming and labor-intensive, seriously affecting the work progress.
[0005] (2) The size of the circular tube is large (it can accommodate magnetic levitation vehicles running inside it), and the tube wall is relatively thick. After the two arc-shaped plates are bent into a semicircle, it is difficult to align the welding ends. Displacement is likely to occur during the welding process, affecting the welding progress. In addition, due to the lack of a stable positioning device, the semicircular plates bent manually with the help of tools are prone to collapse during the welding process, which can easily cause safety accidents and injure workers. Summary of the Invention
[0006] The purpose of the present invention is to provide a round tube manufacturing device for magnetic levitation transportation low-vacuum pipelines, which solves the problems that in the current round tube manufacturing process, two arc-shaped plates need to be manually bent with the help of tools when welding, which is time-consuming and labor-intensive, and the welding ends are difficult to align and easily break due to the thick pipe wall.
[0007] In order to achieve the above object, the present invention adopts the following technical solutions:
[0008] 7. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 1, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shape and a round shank to contact with said linking rod.
[0009] Preferably, the extrusion structure includes a first support frame, which is hollow, and both ends of the first support frame are fixedly connected to the inner walls on both sides of the first mounting groove, and the bottom end of the first support frame is fixedly connected to the base, and first ribs are fixed between the two ends of the first support frame on the side away from the center of the workbench and the top surface of the workbench, and the second hydraulic cylinders are symmetrically fixedly installed on the upper and lower sides of the first support frame on the side away from the center of the workbench, and the telescopic ends of the second hydraulic cylinders penetrate the first support frame and fix the first cross plate respectively, and the first guide rods are fixed at both ends of one side of the first cross plate, and the other ends of the two first guide rods pass through the first support frame and are slidably connected at the contact point.
[0010] Preferably, the same first curved plate is fixed on the side walls of the two first horizontal plates, the first pad is fixedly connected between the outer curved surface of the first curved plate and the first horizontal plate, the first curved limit plates are symmetrically fixed on the top and bottom of the inner curved surface of the first curved plate, a second mounting groove is vertically opened at the center of the inner curved surface of the first curved plate, and a first curved baffle is slidably arranged in the second mounting groove, the diameter of the inner curved surface of the first curved baffle is the same as the diameter of the inner curved surface of the first curved plate, and the axis line of the inner curved surface of the first curved baffle is consistent with the axis line of the inner curved surface of the first curved plate, a groove is vertically opened at the center of the inner curved surface of the first curved baffle, and a clamping plate is slidably arranged in the groove.
[0011] Preferably, the third hydraulic cylinder is symmetrically fixed on the upper and lower outer arc surface of the first arc baffle, the telescopic end of the third hydraulic cylinder penetrates the first arc baffle and extends into the groove and is fixedly connected to the clamping plate, the upper and lower ends of the outer arc surface of the first arc plate are respectively fixed to the opening end of the first U-shaped plate, the first U-shaped plate is fixed to the middle of the side wall away from the first arc plate, the telescopic end of the fourth hydraulic cylinder penetrates the first U-shaped plate and is fixedly connected to the outer arc surface of the first arc baffle, the side wall of the first U-shaped plate away from the first arc plate is penetrated by the second guide rod for sliding connection, and the other end of the second guide rod is fixedly connected to the outer arc surface of the first arc baffle.
[0012] Preferably, the fixed structure includes a second support frame, the second support frame is hollow, the two ends of the second support frame are fixedly connected to the inner walls on both sides of the third mounting groove, the bottom end of the second support frame is fixedly connected to the base, the second ribs are fixed between the two ends of the second support frame on the side close to the center of the workbench and the top surface of the workbench, the fifth hydraulic cylinder is symmetrically fixedly installed on the upper and lower sides of the second support frame on the side close to the center of the workbench, the telescopic ends of the fifth hydraulic cylinder both penetrate the second support frame and fix the second cross plate respectively, the third guide rods are fixed at both ends of one side of the second cross plate, the other ends of the two third guide rods both pass through the second support frame and are slidably connected at the contact point.
[0013] Preferably, the same second curved plate is fixed on the two side walls of the second horizontal plates, the outer curved surface of the second curved plate is arranged opposite to the inner curved surface of the first curved plate, the second pad is fixedly connected between the inner curved surface of the second curved plate and the second horizontal plate, the second curved limit plates are symmetrically fixed on the top and bottom of the outer curved surface of the second curved plate, a fourth mounting groove is vertically opened at the center of the outer curved surface of the second curved plate, and a second curved baffle is slidably arranged in the fourth mounting groove, the diameter of the outer curved surface of the second curved baffle is the same as the diameter of the outer curved surface of the second curved plate, and the axis line of the outer curved surface of the second curved baffle is consistent with the axis line of the outer curved surface of the second curved plate.
[0014] Preferably, the upper and lower ends of the inner arc surface of the second arc-shaped plate are respectively fixed to the opening end of the second U-shaped plate, and the middle part of the side wall of the second U-shaped plate away from the second arc-shaped plate is fixed with a sixth hydraulic cylinder, the telescopic end of the sixth hydraulic cylinder penetrates the second U-shaped plate and is fixedly connected to the inner arc surface of the second arc baffle, and the upper and lower side walls of the second U-shaped plate away from the second arc plate are penetrated by a fourth guide rod for sliding connection, and one end of the fourth guide rod is fixedly connected to the inner arc surface of the second arc baffle.
[0015] Preferably, the top surface of the second curved plate is flush with the top surface of the first curved plate, and the bottom surface of the second curved plate is flush with the bottom surface of the first curved plate, and the distance from the bottom edge of the top first curved limit plate to the top edge of the bottom first curved limit plate is equal to the distance from the bottom edge of the top second curved limit plate to the top edge of the bottom second curved limit plate.
[0016] Preferably, the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, the fifth hydraulic cylinder and the sixth hydraulic cylinder are respectively connected to the pipeline of the external hydraulic station through a conduit.
[0017] Compared with the existing technology, the beneficial effects achieved by the present invention are:
[0018] (1) The two pre-bent arc plates for making the circular tube are extruded into semicircles by two symmetrically arranged extrusion structures. The two ends of the arc plates are pressed against the cardboard in combination with the cardboard to prevent the ends of the arc plates from sliding during the extrusion process. When the cardboard is retracted, the two extruded ends of the arc plates fit together under the elastic action of themselves after being extruded. The connection between the two arc plates is clamped by the fixed structure, and the inner welds of the two arc plate ends fitting together are welded through the fourth mounting groove, and the outer welds of the two arc plate ends fitting together are welded through the second mounting groove, thereby realizing the bending, alignment and welding of the two arc plates. There is no need for manual bending with the help of tools, which saves time and effort, and will not cause the welding ends to be difficult to align due to the thick pipe wall.
[0019] (2) After the welding of the two arc plates is completed, the telescopic end of the first hydraulic cylinder is controlled to retract, and the multiple trapezoidal positioning plates tighten the round tube welded by the two arc plates to make the shape of the round tube perfect. Since the welding points of the two arc plates are clamped between the extrusion structure and the fixed structure, the multiple trapezoidal positioning plates can prevent the welding points of the two arc plates from opening or collapsing when tightening the round tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 Schematic diagram of the structure in an embodiment of the present invention;
[0021] Figure 2 It is a cross-sectional view of the main view of the structure in an embodiment of the present invention;
[0022] Figure 3 This is a bottom view of the structure without the base in the embodiment of the present invention;
[0023] Figure 4 A schematic diagram of an extrusion structure in an embodiment of the present invention;
[0024] Figure 5 A schematic diagram of a fixing structure according to an embodiment of the present invention;
[0025] Figure 6 Schematic diagram of the working state of the structure in an embodiment of the present invention.
[0026] Explanation of reference numerals: 1, base; 2, pad; 3, workbench; 4, slide; 5, mounting plate; 6, first hydraulic cylinder; 7, trapezoidal positioning plate; 8, first mounting groove; 9, first support frame; 10, first rib; 11, second hydraulic cylinder; 12, first transverse plate; 13, first guide rod; 14, first pad; 15, first curved plate; 16, first curved limiting plate; 17, second mounting groove; 18, first curved baffle; 19, groove; 20, clamping plate; 2 1. Third hydraulic cylinder; 22. Third mounting groove; 23. Second support frame; 24. Second rib; 25. Fifth hydraulic cylinder; 26. Second cross plate; 27. Third guide rod; 28. Second pad; 29. Second curved plate; 30. Second curved limit plate; 31. Fourth mounting groove; 32. Second curved baffle; 33. First U-shaped plate; 34. Fourth hydraulic cylinder; 35. Second guide rod; 36. Second U-shaped plate; 37. Sixth hydraulic cylinder; 38. Fourth guide rod. DETAILED DESCRIPTION
[0027] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.
[0028] like Figure 1-3 As shown, a round tube manufacturing device for magnetic levitation transportation low vacuum pipeline includes a base 1, a plurality of pads 2 are fixed on the top surface of the base, and the top surfaces of the plurality of pads 2 are fixed to the same workbench 3, the size of the workbench 3 is the same as that of the base 1, and a plurality of slide grooves 4 are opened in the center of the workbench 3, the slide grooves 4 are through grooves, and the plurality of slide grooves 4 are distributed in a ring with the center of the workbench 3 as the axis. A mounting plate 5 is fixed to the end of each slide groove 4 on the bottom side of the workbench 3 that is farther from the center of the workbench, and a first hydraulic cylinder 6 is fixed on the side wall of the mounting plate 5. The telescopic end of the first hydraulic cylinder 6 penetrates the mounting plate 5 and fixes a trapezoidal positioning plate 7. The top of the trapezoidal positioning plate 7 passes through the slide groove 4 and is slidably arranged with the slide groove, and the top of the trapezoidal positioning plate 7 is higher than the top surface of the workbench 3, and the top surfaces of the workbench 3 are symmetrically opened on both sides. The first mounting groove 8, the two first mounting grooves 8 are each provided with an extrusion structure, and the extrusion structures on both sides are arranged in a mirror-symmetrical manner with the middle vertical plane of the workbench 3 as a mirror image; the two first mounting grooves 8 are symmetrically opened on the opposite side of the third mounting grooves 22, and the two third mounting grooves 22 are each provided with a fixing structure, and the fixing structures on both sides are arranged in a mirror-symmetrical manner with the middle vertical plane of the workbench 3 as a mirror image, and the first mounting groove 8 and the third mounting groove 22 are both through grooves; the two pre-bent arc plates for making the circular tube are extruded into semicircles from the outside through the two symmetrically arranged extrusion structures, and are fixed from the inside of the two pre-bent arc plates in combination with the fixing structure, and the circular tube composed of the two arc plates is tensioned by using the trapezoidal positioning plate to achieve that after the two arc plates are bent into semicircles, the welding ends are aligned and not easy to collapse.
[0029] A further embodiment of the present invention is as follows: Figure 1 、 4As shown, the extrusion structure includes a first support frame 9, which is hollow. The two ends of the first support frame 9 are fixedly connected to the inner walls of the two sides of the first mounting groove 8, and the bottom end of the first support frame 9 is fixedly connected to the base 1. The first ribs 10 are fixed between the two ends of the side of the first support frame 9 away from the center of the workbench 3 and the top surface of the workbench 3. The second hydraulic cylinders 11 are symmetrically fixed on the upper and lower sides of the side of the first support frame 9 away from the center of the workbench 3. The telescopic ends of the two second hydraulic cylinders 11 penetrate the first support frame 9 and fix the first cross plate 12 respectively. The first guide rods 13 are fixed at both ends of one side of the first cross plate 12, and the other ends of the two first guide rods 13 penetrate the first support frame 9 and are slidably connected at the contact point between the two. A first curved plate 15 is fixed on the side wall of the first horizontal plate 12, and a first pad 14 is fixedly connected between the outer curved surface of the first curved plate 15 and the first horizontal plate 12. The top and bottom of the inner curved surface of the first curved plate 15 are symmetrically fixed with a first curved limiting plate 16, and a second mounting groove 17 is vertically provided at the center of the inner curved surface of the first curved plate 15. A first curved baffle 18 is slidably provided in the second mounting groove 17. The inner curved surface diameter of the first curved baffle 18 is the same as that of the inner curved surface of the first curved plate 15, and the inner curved surface axis of the first curved baffle 18 is consistent with the inner curved surface axis of the first curved plate 15. A groove 19 is vertically provided at the center of the inner curved surface of the first curved baffle 18, and a clamping plate 20 is slidably provided in the groove 19. The first curved baffle 1 The third hydraulic cylinder 21 is symmetrically fixed on the upper and lower outer arc surfaces of 8, and the telescopic end of the third hydraulic cylinder 21 penetrates the first arc baffle 18 and extends into the groove 19 and is fixedly connected to the card plate 20. The upper and lower ends of the outer arc surface of the first arc plate 15 are respectively fixed to the open end of the first U-shaped plate 33, and the first U-shaped plate 33 is fixed to the middle of the side wall away from the first arc plate 15. The telescopic end of the fourth hydraulic cylinder 34 penetrates the first U-shaped plate 33 and is fixedly connected to the outer arc surface of the first arc baffle 18. The side wall of the first U-shaped plate 33 away from the first arc plate 15 is penetrated and connected with the second guide rod 35 in a sliding manner. The other end of the second guide rod 35 is fixedly connected to the outer arc surface of the first arc baffle 18; the card plate is limited to prevent the two pre-bending The ends of the curved plates slide back and forth; the curvature of the two pre-bent curved plates is controlled by the second hydraulic cylinder in combination with the first curved plate. When the telescopic end of the second hydraulic cylinder is extended to the maximum extent, the two pre-bent curved plates both reach a semicircle; the first curved limit plate is used to prevent the ends of the two pre-bent curved plates from sliding up and down; during extrusion, the first curved baffle in the second mounting groove assists in extruding the two pre-bent curved plates. After the extrusion is completed, the two pre-bent curved plates are positioned, and the first curved baffle is retracted by the fourth hydraulic cylinder, and the second mounting groove is used to weld the outer welds of the joint ends of the two curved plates; the first guide rod and the second guide rod both guide the movement direction to achieve the purpose of precise positioning.
[0030] A further embodiment of the present invention is as follows: Figure 1 、 5As shown, the fixed structure includes a second support frame 23, the second support frame 23 is hollow, the two ends of the second support frame 23 are fixedly connected to the inner walls on both sides of the third mounting groove 22, the bottom end of the second support frame 23 is fixedly connected to the base 1, and the second ribs 24 are fixed between the two ends of the second support frame 23 on the side close to the center of the workbench 3 and the top surface of the workbench 3. The fifth hydraulic cylinders 25 are symmetrically fixedly installed on the upper and lower sides of the second support frame 23 on the side close to the center of the workbench 3. The telescopic ends of the two fifth hydraulic cylinders 25 penetrate the second support frame 23 and fix the second cross plate 26 respectively. The third guide rods 27 are fixed at both ends of one side of the second cross plate 26, and the other ends of the two third guide rods 27 penetrate the second support frame 23. The support frame 23 is slidably connected at the contact point between the two, and the same second curved plate 29 is fixed on the side walls of the two second horizontal plates 26. The outer curved surface of the second curved plate 29 is arranged opposite to the inner curved surface of the first curved plate 15. The second pad 28 is fixedly connected between the inner curved surface of the second curved plate 29 and the second horizontal plate 26. The second curved limit plates 30 are symmetrically fixed on the top and bottom of the outer curved surface of the second curved plate 29. A fourth mounting groove 31 is vertically opened at the center of the outer curved surface of the second curved plate 29. A second curved baffle 32 is slidably set in the fourth mounting groove 31. The outer curved surface diameter of the second curved baffle 32 is the same as the outer curved surface diameter of the second curved plate 29, and the outer curved surface axis of the second curved baffle 32 is aligned with the outer curved surface of the second curved plate 29. The axis lines are consistent, and the upper and lower ends of the inner arc surface of the second curved plate 29 are respectively fixed to the open end of the second U-shaped plate 36, and the sixth hydraulic cylinder 37 is fixed to the middle of the side wall of the second U-shaped plate 36 away from the second curved plate 29. The telescopic end of the sixth hydraulic cylinder 37 penetrates the second U-shaped plate 36 and is fixedly connected to the inner arc surface of the second curved baffle 32. The second U-shaped plate 36 is away from the side wall of the second curved plate 29 and is slidably connected to the fourth guide rod 38. One end of the fourth guide rod 38 is fixedly connected to the inner arc surface of the second curved baffle 32; the top surface of the second curved plate 29 is flush with the top surface of the first curved plate 15, and the bottom surface of the second curved plate 29 is flush with the bottom surface of the first curved plate 15. The bottom of the first curved limit plate 16 at the top The distance from the edge to the top edge of the first curved limiting plate 16 at the bottom is equal to the distance from the bottom edge of the second curved limiting plate 30 at the top to the top edge of the second curved limiting plate 30 at the bottom; the first hydraulic cylinder 6, the second hydraulic cylinder 11, the third hydraulic cylinder 21, the fourth hydraulic cylinder 34, the fifth hydraulic cylinder 25 and the sixth hydraulic cylinder 37 are respectively connected to the external hydraulic station pipeline through a conduit; the two pre-bent curved plates are limited by the fifth hydraulic cylinder in combination with the second curved plate. When the telescopic end of the fifth hydraulic cylinder is extended to the maximum extent, the second curved plate abuts against the two pre-bent curved plates to prevent the ends of the two pre-bent curved plates from moving inward; the ends of the two pre-bent curved plates are prevented from sliding up and down by the second curved limiting plate;During fixation, the second curved baffle in the fourth mounting groove plays an auxiliary fixing role for the two pre-bent curved plates. After the extrusion is completed and the two pre-bent curved plates are positioned, the second curved baffle is retracted by the sixth hydraulic cylinder, and the inner welds where the ends of the two curved plates meet are welded using the fourth mounting groove. The third guide rod and the fourth guide rod both play a role in guiding the movement direction to achieve the purpose of precise positioning. The distance from the bottom edge of the top first curved limit plate to the top edge of the bottom first curved limit plate is equal to the distance from the bottom edge of the top second curved limit plate to the top edge of the bottom second curved limit plate, ensuring that both the extrusion structure and the fixing structure limit the upper and lower positions of the two pre-bent curved plates.
[0031] Working principle: First, control the telescopic ends of the multiple first hydraulic cylinders 6 to fully extend, so that the multiple trapezoidal positioning plates 7 move toward the center of the workbench and gather together, leaving space on the workbench 3 for placing two pre-bent arc plates, and symmetrically place two pre-bent arc plates on the workbench 3 (such as Figure 6As shown), when placing, the inner arc surfaces of the two pre-bent arc plates are placed opposite to each other, and the pre-bent arc plates are placed between the two sets of extrusion structures, and the telescopic ends of the four second hydraulic cylinders 11 are controlled to extend synchronously, so that the two first arc plates 15 are close to each other, and the two ends of the pre-bent arc plates are respectively in contact with the inner arc surfaces of the two first arc plates 15. The two first arc plates 15 continue to approach and begin to squeeze the pre-bent arc plates until the two ends of the pre-bent arc plates are respectively pressed against the clamping plates 20 extending from the inner arc surfaces of the two first arc plates 15. The clamping plate 20 plays a limiting role to prevent the pre-bent arc plate from sliding. When the telescopic end of the second hydraulic cylinder 11 is extended to the maximum extent, the axis of the inner arc surface of the first arc plate 15 is consistent with the center point of the workbench 3. The distance from the center point of the workbench 3 to the inner arc surface of the first arc plate 15 matches the outer diameter of the circular tube of the vacuum pipe. The telescopic end of the third hydraulic cylinder 21 is controlled to retract, so that the clamping plate 20 is retracted into the groove 19. The two squeezed arc plate ends fit together under the elastic action of themselves after being squeezed, controlling the four fifth The telescopic end of the hydraulic cylinder 25 extends synchronously, causing the two second curved plates 29 to move toward the two extrusion structures respectively. When the telescopic end of the fifth hydraulic cylinder 25 extends to the maximum extent, the outer arc surface of the second arc-shaped limit plate 30 on the second curved plate 29 fits with the inner arc surface of the first arc-shaped limit plate 16 on the first curved plate 15. The axis of the outer arc surface of the second curved plate 29 is consistent with the center point of the workbench 3, and the distance from the center point of the workbench 3 to the outer arc surface of the second curved plate 29 matches the inner diameter of the circular tube of the vacuum pipe. The second curved plate 29 is in a closed position. 9 and the first curved plate 15 clamp the two curved plate ends at the joint, control the telescopic ends of the fourth hydraulic cylinder 34 and the sixth hydraulic cylinder 37 to retract, so that the second curved baffle 32 slides out of the fourth mounting groove 31, and the first curved baffle 18 slides out of the second mounting groove 17, and the inner weld of the two curved plate ends at the joint is welded through the fourth mounting groove 31, and the outer weld of the two curved plate ends at the joint is welded through the second mounting groove 17, completing the bending, alignment and welding of the two curved plates.
[0032] When the welding of the two arc plates is completed, the telescopic end of the first hydraulic cylinder 6 is controlled to retract, and multiple trapezoidal positioning plates 7 tighten the round tube welded by the two arc plates to make the shape of the round tube perfect. When the telescopic end of the first hydraulic cylinder 6 is retracted to the maximum extent, the distance from the center point of the workbench 3 to the fitting surface of the trapezoidal positioning plate 7 and the inner arc surface of the arc plate matches the inner diameter of the round tube of the vacuum pipe. In this process, the welding points of the two arc plates are clamped between the extrusion structure and the fixed structure, and the welding points of the two arc plates are prevented from opening when the multiple trapezoidal positioning plates 7 tighten the round tube.
[0033] The above are only preferred embodiments of the present invention. All equivalent structural transformations made using the contents of the present invention specification under the inventive concept of the present invention, or direct / indirect applications in other related technical fields are included in the protection scope of the present invention.
Claims
1. A round tube manufacturing device for a magnetic levitation transportation low vacuum pipeline, comprising a base (1), characterized in that: A workbench (3) is fixed on the top surface of the base (1), and a plurality of through-slots (4) are provided at the center of the workbench (3). The plurality of slots (4) are distributed in a ring shape with the center of the workbench (3) as the axis. A mounting plate (5) is fixed to the end of each slot (4) on the bottom side of the workbench (3) that is farther from the center of the workbench (3). A first hydraulic cylinder (6) is fixed on the side wall of the mounting plate (5). The telescopic end of the first hydraulic cylinder (6) penetrates the mounting plate (5) and fixes a trapezoidal positioning plate (7). The trapezoidal positioning plate (7) passes through the slot (4) and is slidably arranged with the slot (4), and the top of the trapezoidal positioning plate (7) is higher than the top surface of the workbench (3). First mounting slots (8) are symmetrically provided on both sides of the top surface of the workbench (3). , an extrusion structure is provided in each of the two first installation grooves (8), and the extrusion structures on both sides are arranged in a mirror-symmetrical manner with respect to the middle vertical plane of the workbench (3); a third installation groove (22) is symmetrically opened on the opposite side of the two first installation grooves (8), and a fixed structure is provided in each of the two third installation grooves (22), and the fixed structures on both sides are arranged in a mirror-symmetrical manner with respect to the middle vertical plane of the workbench (3), and the extrusion structure includes a hollow first support frame (9), and the two ends of the first support frame (9) are fixedly connected to the inner walls of the two sides of the first installation groove (8), and the first support frame (9) is symmetrically fixedly installed with a second hydraulic cylinder (11) on the upper and lower sides of the side away from the center of the workbench (3), and the telescopic ends of the second hydraulic cylinder (11) penetrate the first support frame (9) and are respectively The first horizontal plate (12) is fixed separately, and the same first curved plate (15) is fixed on the side walls of the two first horizontal plates (12). The first curved limiting plates (16) are symmetrically fixed on the top and bottom of the inner curved surface of the first curved plate (15). The first curved baffle (18) is slidably arranged in the second mounting groove (17) vertically opened at the center of the inner curved surface of the first curved plate (15). The first curved baffle (18) has the same diameter as the inner curved surface of the first curved plate (15) and the inner curved surface axis is consistent. The clamping plate (20) is slidably arranged in the groove (19) vertically opened at the center of the inner curved surface of the first curved baffle (18); the fixed structure includes a hollow second support frame (23), and the two ends of the second support frame (23) are respectively connected to the third support frame (23). The inner walls on both sides of the mounting groove (22) are fixedly connected, and the fifth hydraulic cylinder (25) is symmetrically fixedly installed on the upper and lower sides of the second support frame (23) close to the center of the workbench (3), and the telescopic ends of the fifth hydraulic cylinder (25) penetrate the second support frame (23) and are respectively fixed to the second transverse plate (26), and the same second curved plate (29) is fixed on the side walls of the two second transverse plates (26), and the outer curved surface of the second curved plate (29) is arranged opposite to the inner curved surface of the first curved plate (15), and the second curved limiting plates (30) are symmetrically fixed on the top and bottom of the outer curved surface of the second curved plate (29), and the second curved baffle (32) is slidably arranged in the fourth mounting groove (31) vertically opened at the center of the outer curved surface of the second curved plate (29).
2. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 1 is characterized in that: The outer arc surface of the first arc baffle (18) is symmetrically fixed with a third hydraulic cylinder (21) at the upper and lower ends, the telescopic end of the third hydraulic cylinder (21) penetrates the first arc baffle (18) and extends into the groove (19) to be fixedly connected to the clamping plate (20). The upper and lower ends of the outer arc surface of the first arc plate (15) are respectively fixed with the open end of the first U-shaped plate (33). The middle part of the side wall of the first U-shaped plate (33) away from the first arc plate (15) is fixed with a fourth hydraulic cylinder (34). The telescopic end of the fourth hydraulic cylinder (34) penetrates the first U-shaped plate (33) and is fixedly connected to the outer arc surface of the first arc baffle (18). The side wall of the first U-shaped plate (33) away from the first arc plate (15) is penetrated by a second guide rod (35) for sliding connection at the upper and lower ends, and the other end of the second guide rod (35) is fixedly connected to the outer arc surface of the first arc baffle (18).
3. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 2, characterized in that: A second pad (28) is fixedly connected between the inner arc surface of the second arc plate (29) and the second transverse plate (26); a fourth mounting groove (31) is vertically provided at the center of the outer arc surface of the second arc plate (29); a second arc baffle (32) is slidably arranged in the fourth mounting groove (31); the outer arc surface diameter of the second arc baffle (32) is the same as the outer arc surface diameter of the second arc plate (29), and the outer arc surface axis of the second arc baffle (32) is consistent with the outer arc surface axis of the second arc plate (29).
4. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 3, characterized in that: The upper and lower ends of the inner arc surface of the second arc plate (29) are respectively fixed to the open end of the second U-shaped plate (36), and the middle part of the side wall of the second U-shaped plate (36) away from the second arc plate (29) is fixed with a sixth hydraulic cylinder (37), the telescopic end of the sixth hydraulic cylinder (37) penetrates the second U-shaped plate (36) and is fixedly connected to the inner arc surface of the second arc baffle (32), and the upper and lower sides of the side wall of the second U-shaped plate (36) away from the second arc plate (29) are penetrated by a fourth guide rod (38) for sliding connection, and one end of the fourth guide rod (38) is fixedly connected to the inner arc surface of the second arc baffle (32).
5. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 4, characterized in that: The top surface of the second curved plate (29) is flush with the top surface of the first curved plate (15), and the bottom surface of the second curved plate (29) is flush with the bottom surface of the first curved plate (15), and the distance from the bottom edge of the top first curved limiting plate (16) to the top edge of the bottom first curved limiting plate (16) is equal to the distance from the bottom edge of the top second curved limiting plate (30) to the top edge of the bottom second curved limiting plate (30).
6. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 5, characterized in that: The first hydraulic cylinder (6), the second hydraulic cylinder (11), the third hydraulic cylinder (21), the fourth hydraulic cylinder (34), the fifth hydraulic cylinder (25) and the sixth hydraulic cylinder (37) are respectively connected to an external hydraulic station pipeline via a conduit.
7. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 1 is characterized in that: The bottom end of the first support frame (9) is fixedly connected to the base (1), and the first ribs (10) are respectively fixed between the two ends of the first support frame (9) away from the center of the workbench (3) and the top surface of the workbench (3), and the first guide rods (13) are fixed to both ends of one side of the first transverse plate (12), and the other ends of the two first guide rods (13) pass through the first support frame (9) and are slidably connected at the contact point between the two, and the first pad (14) is fixedly connected between the outer arc surface of the first arc plate (15) and the first transverse plate (12).
8. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 1 is characterized in that: The bottom end of the second support frame (23) is fixedly connected to the base (1), and the second ribs (24) are respectively fixed between the two ends of one side of the second support frame (23) close to the center of the workbench (3) and the top surface of the workbench (3). The third guide rods (27) are fixed to both ends of one side of the second cross plate (26), and the other ends of the two third guide rods (27) pass through the second support frame (23) and are slidably connected at the contact point between the two.
Citation Information
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