Goods shelf for improving out-of-roundness of large-diameter solid-wall pipe

Abstract

The invention discloses a goods shelf for improving the out-of-roundness of a large-diameter solid-wall pipe, and relates to the technical field of pipe correction, the goods shelf comprises a material frame, and the material frame is used for clamping and limiting the solid-wall pipe; the material rack comprises a first placing rack and a second placing rack which are provided with arc-shaped parts; and when the first placing rack and the second placing rack are spliced, the two arc-shaped parts form a circular structure matched with the outer wall of the solid-wall pipe. Through the arrangement of the first placing frame, the second placing frame and the arc-shaped parts, after a solid-wall pipe is formed and discharged from a machine, in the cooling process of the solid-wall pipe, the solid-wall pipe is placed between the first placing frame and the second placing frame, and the outer diameter of the solid-wall pipe is limited through the arc-shaped parts on the first placing frame and the second placing frame; and the sagging phenomenon of the solid-wall pipe in the cooling process is prevented, deformation of the solid-wall pipe is prevented, and hot melting butt welding work of the pipe is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of pipe correction, and in particular to a shelf for improving the out-of-roundness of large-diameter solid-wall pipes. Background Art

[0002] Polyethylene solid wall pipes, especially those with large diameters above ID630 (i.e., inner diameter of 630mm) and nominal size SDR17 (i.e., the ratio of outer diameter to wall thickness of the pipe is about 17) and above, will have sag during the cooling process due to their large diameter and thick wall (i.e., when the pipe is shaped and cooled, the inner and outer surfaces will first cool rapidly and then gradually cool towards the middle layer. In this process, sometimes the material will naturally flow downward due to its own weight, resulting in uneven wall thickness of the pipe).

[0003] In the prior art, polyethylene solid wall pipes are randomly stacked after being unloaded from the machine. When the pipes are stored in the yard after being unloaded from the machine, the pipes still have a relatively high temperature. During the continuous cooling process of stacking, the large-diameter solid wall pipes will continue to be pressed and deformed due to their heavy weight and the squeezing of adjacent solid wall pipes.

[0004] Since the polyethylene solid wall pipe has a large diameter and thick wall, when the deformed pipe due to sag occurs during hot-melt welding, the end faces of the two pipes cannot be effectively matched, so the strength of the pipe after welding cannot be guaranteed, which seriously affects the service life. Summary of the invention

[0005] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a shelf for improving the out-of-roundness of large-diameter solid-wall tubes, so as to solve the problem proposed in the above-mentioned background technology that the existing solid-wall tubes are prone to sag during the stacking and cooling process after production, causing deformation of the ends of the solid-wall tubes and affecting the subsequent welding work.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A shelf for improving the out-of-roundness of a large-diameter solid-wall tube, comprising a material rack, the material rack being used to clamp and limit the solid-wall tube; the material rack comprising a first placement rack and a second placement rack with an arc portion; when the first placement rack and the second placement rack are spliced, the two arc portions form a circular structure adapted to the outer wall of the solid-wall tube;

[0008] The material rack is provided with a locking mechanism for locking and splicing the first placement rack and the second placement rack, and the locking mechanism is used to limit the relative displacement of the first placement rack and the second placement rack in all directions.

[0009] Preferably, the locking mechanism includes a threaded rod, a threaded hole and a driving mechanism; at least two of the threaded rods are rotatably connected to the second placement rack, at least two of the threaded holes are opened in the first placement rack, and the driving mechanism is used to drive the threaded rod to rotate; when the first placement rack is spliced ​​with the second placement rack, the driving mechanism drives the threaded rod to be screwed into the threaded hole.

[0010] Preferably, the driving mechanism includes a rotating shaft, a worm wheel and a worm; one end of the rotating shaft is connected to the threaded rod, the worm wheel is coaxially arranged with the rotating shaft, the worm is rotatably connected to the second placement rack, and the worm is meshed with the worm wheel.

[0011] Preferably, a pressure limiting mechanism is arranged between the threaded rod and the rotating shaft, and the pressure limiting mechanism includes a first elastic member and a hexagonal shaft; the first elastic member is sleeved on the rotating shaft, and one end of the first elastic member is connected to the threaded rod, the hexagonal shaft is coaxially arranged on the rotating shaft close to one end of the threaded rod, and a sliding groove matching the hexagonal shaft is provided on the threaded rod, and the hexagonal shaft is connected in the sliding groove along the axial direction of the threaded rod.

[0012] Preferably, a first linkage mechanism is arranged in the second placement rack, and the first linkage mechanism is used to drive at least two threaded rods to rotate synchronously; the first linkage mechanism includes a pulley and a belt; the two pulleys are respectively arranged on two rotating shafts, and the belt is tensioned on the two pulleys.

[0013] Preferably, a positioning mechanism is provided on the material rack, and the positioning mechanism includes a first positioning rod, a second positioning rod and a limiting mechanism; a first track groove is provided on both the first placement rack and the second placement rack, and the first track groove is arranged concentrically with the arc portion, the first positioning rod is slidably connected to the second placement rack, and the second positioning rod is slidably connected to the first placement rack; the limiting mechanism is used to lock the position of the first positioning rod;

[0014] When the first placement rack and the second placement rack are spliced, the two first track grooves form an interconnected annular groove structure, the first positioning rod is an arc structure, and the central angle of the arc structure is less than 180°; the second positioning rod is a semicircular arc structure.

[0015] Preferably, the limiting mechanism includes an insertion shaft and a second elastic member; the insertion shaft is inserted into the first positioning rod, the second elastic member is sleeved on the insertion shaft, and one end of the second elastic member is connected to the first positioning rod; the second elastic member is used to drive the insertion shaft to reset after moving; at least one limiting hole adapted to the insertion shaft is formed in the first track groove on the second placement rack; when the insertion shaft is inserted into the limiting hole, one end of the first positioning rod protrudes from the second placement rack, and when the first placement rack is spliced ​​with the second placement rack, the protruding part of the first positioning rod is inserted into the first track groove of the first placement rack.

[0016] Preferably, a second linkage mechanism is provided on the second placement rack, and the second linkage mechanism includes a gear, a rack, a rotating wheel, a connecting belt and a guide wheel; the gear is coaxially arranged on the worm, the rack is slidably connected with the first positioning rod concentrically, and the gear is meshed with the rack, the rotating wheel is rotatably connected to the first positioning rod, a torsion spring is provided at the rotation connection position between the rotating wheel and the first positioning rod, one end of the connecting belt is wound around the rotating wheel, and the other end of the connecting belt is connected to the rack;

[0017] The guide wheel is arranged on the first positioning rod, and the guide wheel is used to provide guidance for the movement of the connecting belt.

[0018] Preferably, a splicing mechanism is provided on the material rack, and the splicing mechanism is used to splice multiple material racks for use; the splicing mechanism includes a first splicing piece and a second splicing piece; the first splicing piece is arranged on one side of the material rack, and the second splicing piece is arranged on the other side of the material rack, and the first splicing piece and the second splicing piece are both provided with a first through hole and a second through hole, and the first through hole and the second through hole on the first splicing piece or the second splicing piece are vertically arranged.

[0019] Preferably, a pipe clamping structure is provided on the arc-shaped portion, and the pipe clamping structure is used to adapt to the clamping of solid wall pipes of different calibers; the pipe clamping structure includes at least one semicircular ring; a slide rail is provided on the outer ring of the semicircular ring, and a second track groove adapted to the slide rail is provided on the inner ring and the arc-shaped portion of the semicircular ring, and the semicircular ring is plugged into the second track groove of the arc-shaped portion through the slide rail.

[0020] Beneficial effects of the present invention:

[0021] 1. By setting the first placement rack, the second placement rack and the arc-shaped portion, after the solid wall tube is formed and removed from the machine, during the cooling process of the solid wall tube, the solid wall tube is placed between the first placement rack and the second placement rack, and the outer diameter of the solid wall tube is limited by the arc-shaped portions on the first placement rack and the second placement rack, so as to prevent the solid wall tube from drooping during the cooling process and prevent the solid wall tube from deforming, thereby facilitating the hot melt welding of the tube;

[0022] 2. By setting a locking mechanism, when the two arc-shaped parts on the first placement rack and the second placement rack are aligned, the driving mechanism drives the threaded rod to rotate, so that the threaded rod is screwed into the threaded hole. As the threaded rod is screwed in, the first placement rack is driven to approach the second placement rack until the first placement rack and the second placement rack are aligned and collide with each other, thereby locking the positions of the first placement rack and the second placement rack. In this way, the outer diameter of the solid wall tube is limited by the arc-shaped parts on the first placement rack and the second placement rack, so as to prevent the solid wall tube from melting and deforming;

[0023] 3. By setting a positioning mechanism, that is, when the first placement rack and the second placement rack are aligned and locked, the first positioning rod is pushed to slide, so that one end of the first positioning rod is inserted into the first track groove on the first placement rack, and the second positioning rod is driven to be inserted into the first track groove on the second placement rack, and then the position of the first positioning rod is locked by the limiting mechanism, and then the first placement rack and the second placement rack are positioned and locked by the first positioning rod and the second positioning rod, so as to improve the stability of the connection between the first placement rack and the second placement rack;

[0024] 4. By setting up a second linkage mechanism, the linkage driving mechanism can directly drive the threaded rod to be automatically screwed in the threaded hole by pushing the first positioning rod to slide into the first track groove of the first placement rack; that is, one action can be used to drive the threaded rod to be automatically screwed in the threaded hole and at the same time drive the first positioning rod to slide in the first track groove of the first placement rack, thereby improving the convenience of use and the stability of the first placement rack and the second placement rack locking the solid wall tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of a three-dimensional structure of a plurality of material racks used in combination according to the present invention;

[0027] Figure 2 It is a schematic diagram of the three-dimensional enlarged structure of the material rack of the present invention;

[0028] Figure 3 It is a partially cutaway three-dimensional enlarged structural schematic diagram of the material rack of the present invention;

[0029] Figure 4 It is a schematic diagram of a partially enlarged three-dimensional structure of the second placement rack of the present invention;

[0030] Figure 5 It is a schematic diagram of the enlarged structure of the first placement rack of the present invention without stereoscopic distinction;

[0031] Figure 6 It is a partially cutaway three-dimensional enlarged structural schematic diagram of the second placement rack of the present invention;

[0032] Figure 7 It is a schematic diagram of a three-dimensional enlarged structure of a rack of the present invention;

[0033] Figure 8 It is a schematic diagram of a three-dimensional enlarged structure of the first positioning rod of the present invention.

[0034] In the figure: 1, material rack; 11, first placement rack; 12, second placement rack; 13, arc portion; 2, locking mechanism; 21, threaded rod; 22, threaded hole; 23, driving mechanism; 231, rotating shaft; 232, worm gear; 233, worm; 234, pressure limiting mechanism; 2341, first elastic member; 2342, hexagonal shaft; 235, first linkage mechanism; 2351, pulley; 2352, belt; 24, positioning mechanism; 241, first track groove; 242, first positioning rod; 24 3. Second positioning rod; 244. Limiting mechanism; 2441. Insert shaft; 2442. Second elastic member; 2443. Limiting hole; 245. Second linkage mechanism; 2451. Gear; 2452. Rack; 2453. Rotating wheel; 2454. Connecting belt; 2455. Guide wheel; 3. Splicing mechanism; 31. First splicing piece; 32. Second splicing piece; 33. First through hole; 34. Second through hole; 4. Pipe clamping structure; 41. Semicircular ring; 42. Slide rail; 43. Second track groove. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figure 1-8 As shown, a shelf for improving the out-of-roundness of large-diameter solid wall tubes, such as Figure 1-4 As shown, it includes a material rack 1, which is used to clamp and limit the solid wall tube; the material rack 1 includes a first placement rack 11 and a second placement rack 12 with an arc portion 13; when the first placement rack 11 and the second placement rack 12 are spliced, the two arc portions 13 form a circular structure that is compatible with the outer wall of the solid wall tube; the material rack 1 is provided with a locking mechanism 2 for locking and splicing the first placement rack 11 and the second placement rack 12, and the locking mechanism 2 is used to limit the relative displacement of the first placement rack 11 and the second placement rack 12 in all directions.

[0037] It should be noted that after the solid wall tube is formed and taken off the machine, it is placed between the first placement rack 11 and the second placement rack 12 during the cooling process of the solid wall tube. The outer diameter of the solid wall tube is limited by the arc portion 13 on the first placement rack 11 and the second placement rack 12 to prevent the solid wall tube from drooping during the cooling process and to prevent the solid wall tube from deforming, thereby facilitating the hot melt butt welding of the tube.

[0038] like Figure 1-5As shown, the locking mechanism 2 includes a threaded rod 21, a threaded hole 22 and a driving mechanism 23; at least two of the threaded rods 21 are rotatably connected to the second placement rack 12, at least two of the threaded holes 22 are opened in the first placement rack 11, and the driving mechanism 23 is used to drive the threaded rod 21 to rotate; when the first placement rack 11 and the second placement rack 12 are spliced, the driving mechanism 23 drives the threaded rod 21 to be screwed into the threaded hole 22.

[0039] It should be noted that the solid-wall tube is first placed on the arc-shaped portion 13 on the second placement rack 12, and then the first placement rack 11 is placed on the second placement rack 12, so that the two arc-shaped portions 13 on the first placement rack 11 and the second placement rack 12 are aligned, and the threaded hole 22 is aligned with the threaded rod 21. At this time, the threaded rod 21 is driven to rotate by the driving mechanism 23, so that the threaded rod 21 is screwed into the threaded hole 22. As the threaded rod 21 is screwed in, the first placement rack 11 is driven to approach the second placement rack 12 until the first placement rack 11 and the second placement rack 12 are aligned and conflict with each other, thereby locking the positions of the first placement rack 11 and the second placement rack 12. In this way, the outer diameter of the solid-wall tube is limited by the arc-shaped portions 13 on the first placement rack 11 and the second placement rack 12 to prevent the solid-wall tube from melting and deforming.

[0040] like Figure 6 As shown, it can be understood that the present application does not limit the specific structure and installation method of the driving mechanism 23, and only a feasible specific implementation method is provided below; the driving mechanism 23 includes a rotating shaft 231, a worm wheel 232 and a worm 233; one end of the rotating shaft 231 is connected to the threaded rod 21, the worm wheel 232 is coaxially arranged with the rotating shaft 231, the worm 233 is rotatably connected to the second placement rack 12, and the worm 233 is meshed with the worm wheel 232.

[0041] It should be noted that by driving the worm 233 to rotate, the worm wheel 232 is driven to rotate, and then the rotating shaft 231 is driven to rotate, and the rotating shaft 231 drives the threaded rod 21 to rotate, so as to achieve the purpose of driving the threaded rod 21 to be screwed into the threaded hole 22. Through the arrangement of the worm wheel 232 and the worm 233 structure, the axial self-locking of the rotating shaft 231 after rotation can be achieved to prevent the threaded rod 21 from loosening.

[0042] like Figure 6 As shown, a pressure limiting mechanism 234 is provided between the threaded rod 21 and the rotating shaft 231, and the pressure limiting mechanism 234 includes a first elastic member 2341 and a hexagonal shaft 2342; it can be understood that the first elastic member 2341 is a prior art, for example Figure 6The spring structure shown in the figure; the first elastic member 2341 is sleeved on the rotating shaft 231, and one end of the first elastic member 2341 is connected to the threaded rod 21, the hexagonal shaft 2342 is coaxially arranged on the rotating shaft 231 near one end of the threaded rod 21, and the threaded rod 21 is provided with a sliding groove adapted to the hexagonal shaft 2342, and the hexagonal shaft 2342 is connected to the sliding groove along the axial direction of the threaded rod 21.

[0043] It should be noted that, since the size of the solid-wall tube may not be standard when it is placed on the second placement rack 12, when the first placement rack 11 is placed in alignment with the second placement rack 12, it is difficult to accurately align the threaded rod 21 with the threaded hole 22. At this time, by setting the pressure limiting mechanism 234, the threaded rod 21 protrudes more, so that when the first placement rack 11 and the second placement rack 12 are not completely close, the threaded rod 21 and the threaded hole 22 are aligned. Since the first placement rack 11 has a certain weight, when the threaded hole 22 on the first placement rack 11 conflicts with the threaded rod 21, a certain pressure will be generated on the threaded rod 21. When the pressure is too large, the threaded rod 21 will be damaged and the use will be affected. Therefore, the pressure limiting mechanism 234 is set. The pressure limiting mechanism 234 offsets a certain amount of pressure; when in use, when the first placement frame 11 moves so that the threaded hole 22 is aligned with the threaded rod 21, the first placement frame 11 will push the threaded hole 22 downward by a certain distance, and the first elastic member 2341 will compress and offset a part of the pressure, and then the driving mechanism 23 drives the rotating shaft 231 to rotate, thereby driving the hexagonal shaft 2342 to rotate, and the hexagonal shaft 2342 drives the threaded rod 21 to rotate, and the threaded rod 21 is screwed into the threaded hole 22. In the process of tightening the threaded rod 21, the first elastic member 2341 will be driven to restore its length first and then extend, so that a reverse pulling force is generated on the threaded rod 21, thereby improving the tightness of the spiral between the threaded rod 21 and the threaded hole 22, and improving the stability of the spiral locking;

[0044] At this time, the tension locking between the first placement rack 11 and the second placement rack 12 generated by the elongation of the first elastic member 2341 can reduce the pressure applied to the solid wall tube and prevent the problem of obvious indentation on the outer wall of the solid wall tube caused by excessive pressure on the solid wall tube.

[0045] like Figure 6 As shown, a first linkage mechanism 235 is arranged in the second placement rack 12; it can be understood that the present application does not limit the specific structure and installation method of the first linkage mechanism 235, and only a feasible specific implementation method is provided below; the first linkage mechanism 235 is used to drive at least two threaded rods 21 to rotate synchronously; the first linkage mechanism 235 includes a pulley 2351 and a belt 2352; the two pulleys 2351 are respectively arranged on the two rotating shafts 231, and the belt 2352 is tensioned on the two pulleys 2351.

[0046] It should be noted that when the worm gear 232 drives the rotating shaft 231 to rotate, it drives the pulley 2351 on the rotating shaft 231 to rotate, and with the cooperation of the belt 2352, it drives another pulley 2351 to rotate, drives another rotating shaft 231 to rotate, and thus drives another threaded rod 21 to rotate synchronously, and synchronously drives the threaded rod 21 to rotate, thereby achieving the purpose of locking the first placement rack 11 and the second placement rack 12 in position.

[0047] like Figure 3-5 As shown, a positioning mechanism 24 is provided on the material rack 1, and the positioning mechanism 24 includes a first positioning rod 242, a second positioning rod 243 and a limiting mechanism 244; a first track groove 241 is provided on the first placement rack 11 and the second placement rack 12, and the first track groove 241 is arranged concentrically with the arc portion 13, the first positioning rod 242 is slidably connected to the second placement rack 12, and the second positioning rod 243 is slidably connected to the first placement rack 11; the limiting mechanism 244 is used to lock the position of the first positioning rod 242; when the first placement rack 11 and the second placement rack 12 are spliced, the two first track grooves 241 form an interconnected annular groove structure, the first positioning rod 242 is an arc structure, and the central angle of the arc structure is less than 180°; the second positioning rod 243 is a semicircular arc structure.

[0048] It should be noted that after the first placement rack 11 and the second placement rack 12 are aligned and locked, the first positioning rod 242 is pushed to slide, so that one end of the first positioning rod 242 is inserted into the first track groove 241 on the first placement rack 11, and the second positioning rod 243 is driven to be inserted into the first track groove 241 on the second placement rack 12, and then the position of the first positioning rod 242 is locked by the limiting mechanism 244, and then the first positioning rod 242 and the second positioning rod 243 are used to position and lock the first placement rack 11 and the second placement rack 12, thereby improving the stability of the connection between the first placement rack 11 and the second placement rack 12.

[0049] like Figure 4 and Figure 8 As shown, the limiting mechanism 244 includes an inserting shaft 2441 and a second elastic member 2442; it can be understood that the second elastic member 2442 is a prior art, for example Figure 8The spring structure shown in the figure, the plug shaft 2441 is inserted into the first positioning rod 242, the second elastic member 2442 is sleeved on the plug shaft 2441, and one end of the second elastic member 2442 is connected to the first positioning rod 242; the second elastic member 2442 is used to drive the plug shaft 2441 to reset after moving; at least one limiting hole 2443 adapted to the plug shaft 2441 is formed in the first track groove 241 on the second placement rack 12; when the plug shaft 2441 is inserted into the limiting hole 2443, one end of the first positioning rod 242 protrudes from the second placement rack 12, and when the first placement rack 11 and the second placement rack 12 are spliced, the protruding part of the first positioning rod 242 is inserted into the first track groove 241 of the first placement rack 11.

[0050] It should be noted that after the first placement rack 11 and the second placement rack 12 are aligned and locked by the driving mechanism 23, the first positioning rod 242 is pushed to move so that a part of the first positioning rod 242 is inserted into the first track groove 241 of the first placement rack 11, and at the same time, the first positioning rod 242 pushes a part of the second positioning rod 243 to be inserted into the first track groove 241 of the second placement rack 12. In this way, through the cooperation of the first positioning rod 242 and the second positioning rod 243, the position between the first placement rack 11 and the second placement rack 12 is further locked, thereby improving the stability of the connection between the first placement rack 11 and the second placement rack 12.

[0051] like Figure 1-8 As shown, a second linkage mechanism 245 is provided on the second placement rack 12, and the second linkage mechanism 245 includes a gear 2451, a rack 2452, a rotating wheel 2453, a connecting belt 2454 and a guide wheel 2455; the gear 2451 is coaxially arranged on the worm 233, the rack 2452 is slidably connected with the first positioning rod 242 concentrically, and the gear 2451 is meshed with the rack 2452, the rotating wheel 2453 is rotatably connected to the first positioning rod 242, and a torsion spring is provided at the rotating connection position between the rotating wheel 2453 and the first positioning rod 242, one end of the connecting belt 2454 is wound around the rotating wheel 2453, and the other end of the connecting belt 2454 is connected to the rack 2452; the guide wheel 2455 is arranged on the first positioning rod 242, and the guide wheel 2455 is used to provide guidance for the movement of the connecting belt 2454.

[0052] It should be noted that, through the setting of the second linkage mechanism 245, the driving mechanism 23 can be driven to start directly by pushing the first positioning rod 242 to slide into the first track groove 241 of the first placement rack 11, so that the driving mechanism 23 drives the threaded rod 21 to be automatically screwed into the threaded hole 22; that is, by pushing the first positioning rod 242 to move, the rack 2452 is driven to move, and the gear 2451 is driven to rotate through the rack 2452, thereby driving the worm 233 to rotate, and the threaded rod 21 can be driven to rotate through the rotation of the worm 233, so that the threaded rod 21 is driven to be screwed into the threaded hole 22;

[0053] As the threaded rod 21 is tightened into the threaded hole 22, the first positioning rod 242 still slides in the first track groove 241 of the second placement rack 12. After the threaded rod 21 and the threaded hole 22 are tightened, as the first positioning rod 242 continues to move, one end of the first positioning rod 242 is driven to be inserted into the first track groove 241 of the first placement rack 11, so that the position between the first placement rack 11 and the second placement rack 12 is locked by tightening the threaded rod 21 into the threaded hole 22, and at the same time, the first positioning rod 242 and the second positioning rod 243 are driven to move to lock the positions of the first placement rack 11 and the second placement rack 12; and when the first positioning rod 242 drives the threaded rod 21 When it is rotated and tightened into the threaded hole 22, as the first positioning rod 242 continues to move, the belt increases the tension between the first positioning rod 242 and the rack 2452. When the tension increases to be greater than the elastic force of the torsion spring, it drives the connecting belt 2454 to extend, allowing the first positioning rod 242 to move, while allowing the first positioning rod 242 to maintain the tension on the rack 2452, so that the threaded rod 21 remains tightened in the threaded hole 22; and then through the locking of the limiting mechanism 244, a certain tension is maintained between the first positioning rod 242 and the rack 2452, thereby improving the stability of the limiting mechanism 244 locking the first positioning rod 242.

[0054] like Figure 1-3 As shown, the material rack 1 is provided with a splicing mechanism 3, and the splicing mechanism 3 is used to splice multiple material racks 1 for use; the splicing mechanism 3 includes a first splicing piece 31 and a second splicing piece 32; the first splicing piece 31 is arranged on one side of the material rack 1, and the second splicing piece 32 is arranged on the other side of the material rack 1, and the first splicing piece 31 and the second splicing piece 32 are both provided with a first through hole 33 and a second through hole 34, and the first through hole 33 and the second through hole 34 on the first splicing piece 31 or the second splicing piece 32 are vertically arranged; the first through hole 33 and the second through hole 34 are used to insert rivets, so as to facilitate stacking the various material racks 1 in series.

[0055] It should be noted that, through the arrangement of the first splicing piece 31 and the second splicing piece 32, a plurality of racks 1 can be stacked in series, which is convenient for the centralized storage of large quantities of pipes and greatly effectively utilizes the space.

[0056] like Figure 1-5 As shown, the arc portion 13 is provided with a pipe clamping structure 4, and the pipe clamping structure 4 is used to adapt to the clamping of solid wall pipes of different calibers; the pipe clamping structure 4 includes at least one semicircular ring 41; a slide rail 42 is provided on the outer ring of the semicircular ring 41, and a second track groove 43 adapted to the slide rail 42 is provided on the inner ring of the semicircular ring 41 and the arc portion 13, and the semicircular ring 41 is inserted into the second track groove 43 of the arc portion 13 through the slide rail 42.

[0057] It should be noted that, by setting the semicircular ring 41, the corresponding semicircular ring 41 can be replaced according to the pipes of different diameters, which increases the convenience of using the rack 1, and the same rack 1 can also stack solid wall pipes of various specifications, which greatly effectively utilizes the space.

[0058] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A shelf for improving the out-of-roundness of large-diameter solid-wall tubes, characterized in that: The material rack (1) comprises a material rack (1) for clamping and limiting the solid wall tube; the material rack (1) comprises a first placement rack (11) and a second placement rack (12) with an arc-shaped portion (13); when the first placement rack (11) and the second placement rack (12) are spliced, the two arc-shaped portions (13) form a circular structure that matches the outer wall of the solid wall tube; The material rack (1) is provided with a locking mechanism (2) for locking and splicing the first placement rack (11) and the second placement rack (12); the locking mechanism (2) is used to limit the relative displacement of the first placement rack (11) and the second placement rack (12) in all directions.

2. A shelf for improving the out-of-roundness of large-diameter solid-wall pipes according to claim 1, characterized in that: The locking mechanism (2) comprises a threaded rod (21), a threaded hole (22) and a driving mechanism (23); at least two of the threaded rods (21) are rotatably connected to the second placement rack (12), at least two of the threaded holes (22) are opened in the first placement rack (11), and the driving mechanism (23) is used to drive the threaded rod (21) to rotate; when the first placement rack (11) and the second placement rack (12) are spliced, the driving mechanism (23) drives the threaded rod (21) to be screwed into the threaded hole (22).

3. A shelf for improving the out-of-roundness of large-diameter solid-wall pipes according to claim 2, characterized in that: The driving mechanism (23) comprises a rotating shaft (231), a worm wheel (232) and a worm (233); one end of the rotating shaft (231) is connected to the threaded rod (21), the worm wheel (232) and the rotating shaft (231) are coaxially arranged, the worm (233) is rotatably connected to the second placement rack (12), and the worm (233) is meshed with the worm wheel (232).

4. A shelf for improving the out-of-roundness of large-diameter solid-wall pipes according to claim 3, characterized in that: A pressure limiting mechanism (234) is arranged between the threaded rod (21) and the rotating shaft (231), and the pressure limiting mechanism (234) comprises a first elastic member (2341) and a hexagonal shaft (2342); the first elastic member (2341) is sleeved on the rotating shaft (231), and one end of the first elastic member (2341) is connected to the threaded rod (21); the hexagonal shaft (2342) is coaxially arranged on the rotating shaft (231) near one end of the threaded rod (21); a sliding groove matching the hexagonal shaft (2342) is provided on the threaded rod (21), and the hexagonal shaft (2342) is slidably connected in the sliding groove along the axial direction of the threaded rod (21).

5. A shelf for improving the out-of-roundness of large-diameter solid-wall pipes according to claim 3, characterized in that: A first linkage mechanism (235) is arranged in the second placement rack (12), and the first linkage mechanism (235) is used to drive at least two threaded rods (21) to rotate synchronously; the first linkage mechanism (235) comprises a pulley (2351) and a belt (2352); the two pulleys (2351) are respectively arranged on two rotating shafts (231), and the belt (2352) is tensioned on the two pulleys (2351).

6. A shelf for improving the out-of-roundness of large-diameter solid-wall pipes according to claim 3, characterized in that: The material rack (1) is provided with a positioning mechanism (24), and the positioning mechanism (24) includes a first positioning rod (242), a second positioning rod (243) and a limiting mechanism (244); the first placement rack (11) and the second placement rack (12) are both provided with a first track groove (241), and the first track groove (241) is arranged cocentrically with the arc portion (13); the first positioning rod (242) is slidably connected to the second placement rack (12), and the second positioning rod (243) is slidably connected to the first placement rack (11); the limiting mechanism (244) is used to lock the position of the first positioning rod (242); When the first placement rack (11) and the second placement rack (12) are spliced, the two first track grooves (241) form a mutually connected annular groove structure, the first positioning rod (242) is an arc structure, and the central angle of the arc structure is less than 180°; the second positioning rod (243) is a semicircular arc structure.

7. A shelf for improving the out-of-roundness of large-diameter solid-wall pipes according to claim 6, characterized in that: The limiting mechanism (244) comprises an insert shaft (2441) and a second elastic member (2442); the insert shaft (2441) is inserted into the first positioning rod (242), the second elastic member (2442) is sleeved on the insert shaft (2441), and one end of the second elastic member (2442) is connected to the first positioning rod (242); the second elastic member (2442) is used to drive the insert shaft (2441) to move and then reset; at least one of the second elastic members (2442) is connected to the insert shaft (2441) ) is formed in the first track groove (241) on the second placement rack (12); when the insertion shaft (2441) is inserted into the limiting hole (2443), one end of the first positioning rod (242) protrudes from the second placement rack (12), and when the first placement rack (11) and the second placement rack (12) are spliced, the protruding part of the first positioning rod (242) is inserted into the first track groove (241) of the first placement rack (11).

8. A shelf for improving the out-of-roundness of large-diameter solid-wall pipes according to claim 6, characterized in that: The second placement rack (12) is provided with a second linkage mechanism (245), which comprises a gear (2451), a rack (2452), a rotating wheel (2453), a connecting belt (2454) and a guide wheel (2455); the gear (2451) is coaxially arranged on the worm (233), the rack (2452) is slidably connected with the first positioning rod (242) coaxially, and the gear (2451) and the rack (2452) are meshed, the rotating wheel (2453) is rotationally connected to the first positioning rod (242), a torsion spring is arranged at the rotation connection position between the rotating wheel (2453) and the first positioning rod (242), one end of the connecting belt (2454) is wound around the rotating wheel (2453), and the other end of the connecting belt (2454) is connected to the rack (2452); The guide wheel (2455) is arranged on the first positioning rod (242), and the guide wheel (2455) is used to provide guidance for the movement of the connecting belt (2454).

9. A shelf for improving the out-of-roundness of large-diameter solid-wall pipes according to claim 1, characterized in that: The material rack (1) is provided with a splicing mechanism (3), and the splicing mechanism (3) is used to splice a plurality of material racks (1) for use; the splicing mechanism (3) comprises a first splicing piece (31) and a second splicing piece (32); the first splicing piece (31) is arranged on one side of the material rack (1), and the second splicing piece (32) is arranged on the other side of the material rack (1); the first splicing piece (31) and the second splicing piece (32) are both provided with a first through hole (33) and a second through hole (34), and the first through hole (33) and the second through hole (34) on the first splicing piece (31) or the second splicing piece (32) are arranged vertically.

10. A shelf for improving the out-of-roundness of large-diameter solid-wall pipes according to claim 1, characterized in that: The arc-shaped portion (13) is provided with a pipe clamping structure (4), and the pipe clamping structure (4) is used for clamping solid-wall pipes of different calibers; the pipe clamping structure (4) comprises at least one semicircular ring (41); a slide rail (42) is provided on the outer ring of the semicircular ring (41); a second track groove (43) adapted to the slide rail (42) is provided on the inner ring of the semicircular ring (41) and the arc-shaped portion (13); the semicircular ring (41) is plugged into the second track groove (43) of the arc-shaped portion (13) through the slide rail (42).

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