Round pipe manufacturing device for magnetic levitation traffic low-vacuum pipeline

Abstract

The invention belongs to the technical field of metal pipe machining, and particularly relates to a round pipe manufacturing device for a magnetic levitation traffic low-vacuum pipeline. A plurality of cushion blocks are fixed to the top face of a base, the same workbench is fixed to the top faces of the cushion blocks, a plurality of sliding grooves are formed in the center of the workbench, and the sliding grooves are annularly distributed with the center of the workbench as the axis; a mounting plate is fixed to one end of each sliding groove in the bottom face side of the workbench, first hydraulic cylinders are fixed to the mounting plates and penetrate through the mounting plates to fix trapezoidal positioning plates, first mounting grooves are symmetrically formed in the two sides of the top face of the workbench correspondingly, extrusion structures are arranged in the two first mounting grooves correspondingly, and the extrusion structures on the two sides are arranged in a mirror symmetry mode; third mounting grooves are symmetrically formed in the opposite sides of the two first mounting grooves correspondingly, fixing structures are arranged in the two third mounting grooves correspondingly, and the fixing structures on the two sides are arranged in a mirror symmetry mode. The device does not need manual bending by means of tools, time and labor are saved, and the welding position of the two arc-shaped plates is prevented from being broken or broken.

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 a magnetic suspension transportation low-vacuum pipeline. 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 tracks, 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. The low vacuum pipeline is welded from multiple round tubes, and each section of the round tube is welded from two arc plates. At present, there are the following deficiencies in the production process of round tubes: (1) The two curved plates are formed by pre-bending the flat plates. After pre-bending, the curved plates cannot achieve 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, which seriously affects the work progress; (2) The size of the circular tube is large (it can accommodate a magnetic levitation vehicle 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 their 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 that are manually bent 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

[0003] The purpose of the present invention is to provide a round tube manufacturing device for a magnetic levitation transportation low-vacuum pipeline, so as to solve the problems that in the current round tube manufacturing process, two arc-shaped plates need to be bent manually with the help of tools during welding, which is time-consuming and labor-intensive, and the welding ends are difficult to align and easy to break due to the thick tube wall.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme: A round tube manufacturing device for a magnetic levitation traffic low vacuum pipeline comprises a base, a plurality of pads are fixed on the top surface of the base, a same workbench is fixed on the top surfaces of the plurality of pads, the size of the workbench is the same as that of the base, a plurality of slide grooves are provided at the center of the workbench, the slide grooves are through grooves, the plurality of slide grooves are distributed in an annular manner with the center of the workbench as the axis, a mounting plate is fixed on the end of each slide groove on the bottom surface side of the workbench that is farther from the center of the workbench, a first hydraulic cylinder is fixed on the side wall of the mounting plate, the telescopic end of the first hydraulic cylinder penetrates the mounting plate and fixes a trapezoidal positioning plate, the trapezoidal positioning plate passes through the slide groove and is slidably arranged with the slide groove, and the top end of the trapezoidal positioning plate is higher than the top surface of the workbench, first mounting grooves are symmetrically provided on both sides of the top surface of the workbench, extrusion structures are provided in the two first mounting grooves, and the extrusion structures on both sides are arranged in a mirror symmetry with the middle vertical plane of the workbench as a mirror image; third mounting grooves are symmetrically provided on the opposite sides of the two first mounting grooves, fixed structures are provided in the two third mounting grooves, and the fixed structures on both sides are arranged in a mirror symmetry with the middle vertical plane of the workbench as a mirror image, and both the first mounting groove and the third mounting groove are through grooves.

[0005] Preferably, the extrusion structure includes a first support frame, which is hollow, with two ends of the first support frame fixedly connected to the inner walls of both sides of the first mounting groove, the bottom end of the first support frame fixedly connected to the base, first ribs are fixed between the two ends of the first support frame on a side away from the center of the workbench and the top surface of the workbench, and second hydraulic cylinders are symmetrically fixedly installed on the upper and lower sides of the first support frame away from the center of the workbench, the telescopic ends of the second hydraulic cylinders both penetrate the first support frame and fix the first cross plate respectively, 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 both pass through the first support frame and are slidably connected at the contact point.

[0006] Preferably, the same first curved plate is fixed on the side walls of the two first horizontal plates, a first pad is fixedly connected between the outer curved surface of the first curved plate and the first horizontal plate, a first curved limiting plate is 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, a first curved baffle is slidably arranged in the second mounting groove, a diameter of the inner curved surface of the first curved baffle is the same as that of the inner curved surface of the first curved plate, and an axial line of the inner curved surface of the first curved baffle is consistent with an axial 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.

[0007] Preferably, a 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 to be 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 fourth hydraulic cylinder is fixed to the middle part of the side wall of the first U-shaped plate 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 slidably connected to the second guide rod, and the other end of the second guide rod is fixedly connected to the outer arc surface of the first arc baffle.

[0008] Preferably, the fixed structure includes a second support frame, the second support frame is hollow, two ends of the second support frame are fixedly connected to the inner walls of both sides of the third mounting groove, the bottom end of the second support frame is fixedly connected to the base, 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, and 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.

[0009] 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, 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 center line of the outer curved surface of the second curved baffle is consistent with the axis center line of the outer curved surface of the second curved plate.

[0010] 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 sixth hydraulic cylinder is fixed to the middle of the side wall of the second U-shaped plate away from the second arc-shaped plate, 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 plate, 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 plate.

[0011] 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.

[0012] 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 an external hydraulic station pipeline through a conduit.

[0013] Compared with the existing technology, the beneficial effects achieved by the present invention are: (1) Two pre-bent arc plates for making a circular tube are extruded into semicircles by two symmetrically arranged extrusion structures, and 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, and the connection between the two arc plates is clamped by the fixed structure, and the inner weld of the fitting part of the two arc plate ends is welded through the fourth mounting groove, and the outer weld of the fitting part of the two arc plate ends is welded through the second mounting groove, so as to realize the bending, alignment and welding of the two arc plates, without the need for manual bending with the help of tools, saving time and labor, and also preventing the welding ends from being difficult to align due to the thick pipe wall; (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 tension 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 tensioning the round tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure in an embodiment of the present invention; Figure 2 It is a cross-sectional view of the main view of the structure in an embodiment of the present invention; Figure 3 A bottom view of the structure in the embodiment of the present invention without the base; Figure 4 A schematic diagram of an extrusion structure in an embodiment of the present invention; Figure 5 is a schematic diagram of a fixing structure in an embodiment of the present invention; Figure 6 Schematic diagram of the working state of the structure in the embodiment of the present invention.

[0015] Description of the accompanying drawings: 1, base; 2, cushion block; 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 plate; 11, second hydraulic cylinder; 12, first cross plate; 13, first guide rod; 14, first cushion plate; 15, first arc plate; 16, first arc limit plate; 17, second mounting groove; 18, first arc baffle; 19, groove; 20, clamping plate; 2 1. The third hydraulic cylinder; 22. The third mounting groove; 23. The second support frame; 24. The second rib plate; 25. The fifth hydraulic cylinder; 26. The second cross plate; 27. The third guide rod; 28. The second pad plate; 29. ​​The second arc plate; 30. The second arc-shaped limit plate; 31. The fourth mounting groove; 32. The second arc-shaped baffle plate; 33. The first U-shaped plate; 34. The fourth hydraulic cylinder; 35. The second guide rod; 36. The second U-shaped plate; 37. The sixth hydraulic cylinder; 38. The fourth guide rod. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1-3 As shown, a round tube manufacturing device for a magnetic levitation transportation low-vacuum pipeline includes a base 1, a plurality of pads 2 are fixed on the top surface of the base, a same workbench 3 is fixed on the top surfaces of the plurality of pads 2, the size of the workbench 3 is the same as that of the base 1, a plurality of slide grooves 4 are provided at 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 shape with the center of the workbench 3 as the axis, and 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, 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 end of the trapezoidal positioning plate 7 passes through the slide groove 4 and is slidably arranged with the slide groove, and the top end of the trapezoidal positioning plate 7 is higher than the top surface of the workbench 3, and symmetrical openings are provided on both sides of the top surface of the workbench 3. The first mounting groove 8, the two first mounting grooves 8 are both provided with extrusion structures, and the extrusion structures on both sides are arranged in a mirror symmetry with the middle vertical plane of the workbench 3 as a mirror image; the third mounting grooves 22 are symmetrically opened on the opposite sides of the two first mounting grooves 8, and the two third mounting grooves 22 are both provided with fixed structures, and the fixed structures on both sides are arranged in a mirror symmetry 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 round 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 fixed structure, and the round tube composed of the two arc plates is tensioned by using the trapezoidal positioning plate, so that after the two arc plates are bent into a semicircle, the welding ends are aligned and not easy to collapse.

[0018] 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. Both ends of the first support frame 9 are fixedly connected to the inner walls of both 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, and the second hydraulic cylinders 11 are symmetrically fixedly installed 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 arc plate 15 is fixed on the side wall of the first horizontal plate 12, a first pad 14 is fixedly connected between the outer arc surface of the first arc plate 15 and the first horizontal plate 12, a first arc-shaped limit plate 16 is symmetrically fixed on the top and bottom of the inner arc surface of the first arc plate 15, a second mounting groove 17 is vertically provided at the center of the inner arc surface of the first arc plate 15, a first arc baffle 18 is slidably provided in the second mounting groove 17, the inner arc surface diameter of the first arc baffle 18 is the same as the inner arc surface diameter of the first arc plate 15, and the inner arc surface axis of the first arc baffle 18 is consistent with the inner arc surface axis of the first arc plate 15, a groove 19 is vertically provided at the center of the inner arc surface of the first arc baffle 18, a clamping plate 20 is slidably provided in the groove 19, and the first arc baffle 1 The third hydraulic cylinder 21 is symmetrically fixed on the upper and lower outer arc surface 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 clamping plate 20. The upper and lower ends of the outer arc surface of the first arc plate 15 are respectively fixed to the opening end of the first U-shaped plate 33, and the middle part of the side wall of the first U-shaped plate 33 away from the first arc plate 15 is fixed with the fourth hydraulic cylinder 34, and 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 slidably connected to the second guide rod 35, and the other end of the second guide rod 35 is fixedly connected to the outer arc surface of the first arc baffle 18; the clamping plate is limited to prevent the two pre-compression bends The ends of the arc-shaped plates slide back and forth; the curvature of the two pre-bent arc-shaped plates is controlled by the second hydraulic cylinder in combination with the first arc-shaped plate. When the telescopic end of the second hydraulic cylinder is extended to the maximum extent, the two pre-bent arc-shaped plates both reach a semicircle; the first arc-shaped limit plate is used to prevent the ends of the two pre-bent arc-shaped plates from sliding up and down; during extrusion, the first arc-shaped baffle plate in the second mounting groove plays an auxiliary extrusion role for the two pre-bent arc-shaped plates. After the extrusion is completed, the two pre-bent arc-shaped plates are positioned, and the first arc-shaped baffle plate is retracted by the fourth hydraulic cylinder, and the outer welds of the joints of the ends of the two arc-shaped plates are welded by using the second mounting groove; the first guide rod and the second guide rod both play a role in guiding the moving direction to achieve the purpose of precise positioning.

[0019] 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 respectively fixedly connected to the inner walls of the two 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 respectively 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, and the fifth hydraulic cylinders 25 are symmetrically fixedly installed on the upper and lower sides of the second support frame 23 close to the center of the workbench 3, the telescopic ends of the two fifth hydraulic cylinders 25 both 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 both penetrate the second support frame 23. The support frame 23 is slidably connected at the contact point between the two second transverse plates 26, and the same second arc plate 29 is fixed on the side walls of the two second transverse plates 26. The outer arc surface of the second arc plate 29 is arranged opposite to the inner arc surface of the first arc plate 15. The second pad 28 is fixedly connected between the inner arc surface of the second arc plate 29 and the second transverse plate 26. The second arc limiting plate 30 is symmetrically fixed on the top and bottom of the outer arc surface of the second arc plate 29, and a fourth mounting groove 31 is vertically opened at the center of the outer arc surface of the second arc plate 29. A second arc baffle plate 32 is slidably arranged in the fourth mounting groove 31. The outer arc surface diameter of the second arc baffle plate 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 plate 32 is aligned with the outer arc surface of the second arc plate 29. The axis lines are consistent, the upper and lower ends of the inner arc surface of the second arc plate 29 are respectively fixed with the opening end of the second U-shaped plate 36, 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 arc 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 arc baffle 32, the upper and lower sides of the second U-shaped plate 36 away from the second arc plate 29 are penetrated by the 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; the top surface of the second arc plate 29 is flush with the top surface of the first arc plate 15, and the bottom surface of the second arc plate 29 is flush with the bottom surface of the first arc plate 15, and the bottom of the first arc limit plate 16 at the top The distance from the edge to the top edge of the first arc-shaped limiting plate 16 at the bottom is equal to the distance from the bottom edge of the second arc-shaped limiting plate 30 at the top to the top edge of the second arc-shaped 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 arc plates are limited by the fifth hydraulic cylinder in combination with the second arc plate, and when the telescopic end of the fifth hydraulic cylinder is extended to the maximum extent, the second arc plate abuts against the two pre-bent arc plates to prevent the ends of the two pre-bent arc plates from moving inward; the ends of the two pre-bent arc plates are prevented from sliding up and down by the second arc-shaped limiting plate;When fixing, the second arc baffle in the fourth installation groove plays an auxiliary fixing role for the two pre-bent arc plates. After the extrusion is completed, the two pre-bent arc plates have been positioned. The second arc baffle is retracted by the sixth hydraulic cylinder, and the inner welds of the joints of the ends of the two arc plates are welded by using the fourth installation groove; the third guide rod and the fourth guide rod both play a role in guiding the moving direction to achieve the purpose of precise positioning; the distance from the bottom edge of the top first arc limit plate to the top edge of the bottom first arc limit plate is equal to the distance from the bottom edge of the top second arc limit plate to the top edge of the bottom second arc limit plate, ensuring that the extrusion structure and the fixing structure both limit the upper and lower positions of the two pre-bent arc plates. ;

[0020] 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 in the figure, 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 groups 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 end 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 round 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 effect of themselves after being squeezed, and the four fifth The telescopic end of the hydraulic cylinder 25 is extended synchronously, so that the two second arc plates 29 move toward the two extrusion structure directions respectively. When the telescopic end of the fifth hydraulic cylinder 25 is extended to the maximum extent, the outer arc surface of the second arc-shaped limit plate 30 on the second arc-shaped plate 29 is fitted with the inner arc surface of the first arc-shaped limit plate 16 on the first arc-shaped plate 15, and the axis of the outer arc surface of the second arc-shaped 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 arc-shaped plate 29 matches the inner diameter of the circular tube of the vacuum pipe. 9 and the first curved plate 15 clamp the fitting part of the two curved plate ends, control the telescopic ends of the fourth hydraulic cylinder 34 and the sixth hydraulic cylinder 37 to retract, so that the second curved baffle plate 32 slides out of the fourth mounting groove 31, and the first curved baffle plate 18 slides out of the second mounting groove 17, and the inner weld of the fitting part of the two curved plate ends is welded through the fourth mounting groove 31, and the outer weld of the fitting part of the two curved plate ends is welded through the second mounting groove 17, so as to complete the bending, alignment and welding of the two curved plates.

[0021] 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 tension 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 tension the round tube.

[0022] The above are only preferred embodiments of the present invention. All equivalent structural changes made by using the contents of the present invention specification under the inventive concept of the present invention, or direct / indirect application 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 plurality of pads (2) are fixed on the top surface of the base (1), and a same workbench (3) is fixed on the top surfaces of the plurality of pads (2). The size of the workbench (3) is the same as that of the base (1). A plurality of slide grooves (4) are provided at the center of the workbench (3), and the slide grooves (4) are through grooves. The plurality of slide grooves (4) are distributed in a ring shape with the center of the workbench (3) as the axis. A mounting plate (5) is fixed at one end of each slide groove (4) located on the bottom surface 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 slide groove (4) and is slidably arranged with the slide groove (4), and the top end of the trapezoidal positioning plate (7) is higher than the top surface of the workbench (3), and first installation grooves (8) are symmetrically provided on both sides of the top surface of the workbench (3), and extrusion structures are provided in the two first installation grooves (8), and the extrusion structures on both sides are arranged in a mirror symmetry with the middle vertical plane of the workbench (3) as a mirror image; third installation grooves (22) are symmetrically provided on the opposite side of the two first installation grooves (8), and fixed structures are provided in the two third installation grooves (22), and the fixed structures on both sides are arranged in a mirror symmetry with the middle vertical plane of the workbench (3) as a mirror image, and the first installation groove (8) and the third installation groove (22) are both through grooves.

2. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 1 is characterized in that: The extrusion structure comprises a first support frame (9), the first support frame (9) is hollow, the two ends of the first support frame (9) are respectively fixedly connected to the inner walls of the two sides of the first installation groove (8), the bottom end of the first support frame (9) is fixedly connected to the base (1), 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), the second hydraulic cylinders (11) are respectively fixedly installed symmetrically on the upper and lower sides of the first support frame (9) away from the center of the workbench (3), the telescopic ends of the second hydraulic cylinders (11) both penetrate the first support frame (9) and are respectively fixed to the first cross plate (12), the first guide rods (13) are both fixed to the two ends of one side of the first cross plate (12), and the other ends of the two first guide rods (13) both pass through the first support frame (9) and are slidably connected at the contact point between the two.

3. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 2 is characterized in that: The same first arc plate (15) is fixed on the side walls of the two first transverse plates (12); a first pad (14) is fixedly connected between the outer arc surface of the first arc plate (15) and the first transverse plate (12); first arc-shaped limit plates (16) are symmetrically fixed to the top and bottom of the inner arc surface of the first arc plate (15); a second mounting groove (17) is vertically provided at the center of the inner arc surface of the first arc plate (15); a first arc baffle (18) is slidably provided in the second mounting groove (17); the inner arc surface diameter of the first arc baffle (18) is the same as that of the first arc plate (15); and the inner arc surface axis of the first arc baffle (18) is consistent with the inner arc surface axis of the first arc plate (15); a groove (19) is vertically provided at the center of the inner arc surface of the first arc baffle (18); a clamping plate (20) is slidably provided in the groove (19).

4. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 3 is characterized in that: A third hydraulic cylinder (21) is symmetrically fixed to the upper and lower outer arc surface of the first arc baffle (18); a 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); an opening end of a first U-shaped plate (33) is fixed to the upper and lower ends of the outer arc surface of the first arc plate (15); a fourth hydraulic cylinder (34) is fixed to the middle of the side wall of the first U-shaped plate (33) away from the first arc plate (15); a 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); a second guide rod (35) is slidably connected to the upper and lower sides of the side wall of the first U-shaped plate (33) away from the first arc plate (15); the other end of the second guide rod (35) is fixedly connected to the outer arc surface of the first arc baffle (18).

5. A round tube manufacturing device for a magnetic levitation transportation low vacuum pipeline according to any one of claims 1 or 4, characterized in that: The fixed structure comprises a second support frame (23), the second support frame (23) is hollow, two ends of the second support frame (23) are respectively fixedly connected to the inner walls of the third mounting groove (22), the bottom end of the second support frame (23) is fixedly connected to the base (1), 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), and the fifth hydraulic cylinder (25) is respectively fixedly installed symmetrically on the upper and lower sides of the side of the second support frame (23) close to the center of the workbench (3), the telescopic ends of the fifth hydraulic cylinder (25) both penetrate the second support frame (23) and are respectively fixed to the second cross plate (26), the two ends of one side of the second cross plate (26) are both fixed to the third guide rods (27), the other ends of the two third guide rods (27) both pass through the second support frame (23) and are slidably connected at the contact point between the two.

6. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 5 is characterized in that: The same second arc plate (29) is fixed on the side walls of the two second transverse plates (26); the outer arc surface of the second arc plate (29) is arranged opposite to the inner arc surface of the first arc plate (15); the second pad (28) is fixedly connected between the inner arc surface of the second arc plate (29) and the second transverse plate (26); the second arc limit plates (30) are symmetrically fixed at the top and bottom of the outer arc surface of the second arc plate (29); 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 plate (32) is slidably arranged in the fourth mounting groove (31); the outer arc surface diameter of the second arc baffle plate (32) is the same as the outer arc surface diameter of the second arc plate (29); and the axis center line of the outer arc surface of the second arc baffle plate (32) is consistent with the axis center line of the outer arc surface of the second arc plate (29).

7. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 6 is characterized in that: The upper and lower ends of the inner arc surface of the second arc-shaped plate (29) are respectively fixed to the open end of the second U-shaped plate (36); a sixth hydraulic cylinder (37) is fixed to the middle of the side wall of the second U-shaped plate (36) away from the second arc-shaped 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 arc-shaped baffle (32); the upper and lower sides of the side wall of the second U-shaped plate (36) away from the second arc-shaped plate (32) are penetrated by a fourth guide rod (38) for sliding connection; one end of the fourth guide rod (38) is fixedly connected to the inner arc surface of the second arc-shaped baffle (32).

8. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 7 is 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 limit plate (16) to the top edge of the bottom first curved limit plate (16) is equal to the distance from the bottom edge of the top second curved limit plate (30) to the top edge of the bottom second curved limit plate (30).

9. The round tube manufacturing device for magnetic levitation transportation low vacuum pipeline according to claim 8 is 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.

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