A thin-walled stainless steel pipe correcting device

Abstract

This utility model relates to the field of stainless steel pipe alignment technology, specifically a thin-walled stainless steel pipe alignment device, including a bracket and a mounting base. The mounting base has multiple sets of annularly distributed abutments. An mounting rod is fixedly mounted on the bracket, with a first push rod slidably mounted inside the mounting rod, and a second push rod slidably mounted inside the first push rod. The mounting base is rotatably mounted on the second push rod via a rotating shaft. The mounting base has an adjustment mechanism for adjusting the position of the abutments, and the mounting rod has a feeding mechanism. The adjustment mechanism includes a mounting ring rotatably mounted inside the mounting base, and the mounting base has multiple sets of annularly distributed adjustment frames. By pulling the rack and pinion via a slide, the second gear and the rotating rod rotate, causing the pawl to disengage from the ratchet. At this time, the upper mounting shaft can rotate freely. The mounting shaft, through the meshing transmission between the gear ring and the first gear, drives the multiple sets of adjustment frames to deflect synchronously, thereby precisely adjusting the enclosing radius of the multiple sets of abutments to adapt to the alignment needs of pipes with different diameters.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel pipe alignment technology, specifically to a thin-walled stainless steel pipe alignment device. Background Technology

[0002] During the manufacturing, storage, transportation, and installation of thin-walled stainless steel pipes, due to the material's thin wall thickness (typically 0.5-2.0 mm) and high yield strength, it is highly susceptible to defects such as localized indentations, elliptical deformation, or wavy wrinkles under external forces such as mechanical impact, pressure buildup, or installation stress. These deformations not only significantly reduce the pipe's pressure-bearing capacity and fluid transmission efficiency, leading to increased Reynolds numbers and energy consumption, but may also cause engineering hazards such as media stagnation, corrosion risks, and sealing failure at flange connections.

[0003] Traditional pipe straightening methods often employ external clamps or hammering for repair, which not only easily damages the pipe wall surface but also makes it difficult to accurately restore the pipe's roundness, especially for internal dents. While some pipe internal support devices exist in existing technologies, their structures are mostly fixed in size or provide unidirectional support, failing to adapt to the dynamic adjustment requirements of different pipe diameters. Furthermore, they lack a rotational compaction repair mechanism, resulting in residual deformation or stress concentration issues that may still exist in the straightened pipe. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a thin-walled stainless steel pipe straightening device, which solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a thin-walled stainless steel pipe straightening device, comprising a bracket and a mounting base, wherein the mounting base is provided with multiple sets of annularly distributed abutments, a mounting rod is fixedly mounted on the bracket, a first push rod is slidably mounted inside the mounting rod, a second push rod is slidably mounted inside the first push rod, the mounting base is rotatably mounted on the second push rod via a rotating shaft, the mounting base is provided with an adjustment mechanism for adjusting the position of the abutments, and the mounting rod is provided with a feeding mechanism;

[0008] The adjustment mechanism includes a mounting ring rotatably installed in the mounting base, a gear ring sleeved on the mounting ring, and multiple sets of annularly distributed adjustment frames inside the mounting base. The number of adjustment frames corresponds to the number of abutments, and the abutments are fixedly installed on the corresponding adjustment frames. All sets of adjustment frames are rotatably connected to the mounting base through mounting shafts. Multiple sets of mounting shafts are annularly distributed around the mounting ring, and each set of mounting shafts is sleeved with a first gear. All sets of first gears are meshed with the gear ring. Two sets of symmetrically distributed ratchet wheels are sleeved on the upper mounting shaft.

[0009] Preferably, the mounting base is provided with two sets of pawls that mesh with the ratchet. Both sets of pawls are rotatably connected to the mounting base through rotating rods. A torsion spring is sleeved on the mounting base, and the two ends of the torsion spring are fixedly connected to the pawls and the mounting base, respectively. A second gear is sleeved on both sets of rotating rods.

[0010] Preferably, two sets of racks that mesh with the second gear are slidably installed in the mounting base, a slide is slidably installed in the mounting base, the slide is fixedly connected to the two sets of racks respectively, and a slide rod corresponding to the slide is fixedly installed in the mounting base.

[0011] Preferably, the slide is slidably connected to the slide rod, and two sets of symmetrically distributed springs are sleeved on the slide rod, with the two ends of the two sets of springs respectively fixedly connected to the slide and the mounting base.

[0012] Preferably, the feeding mechanism includes a threaded rod rotatably mounted in the mounting rod, the end of the threaded rod away from the mounting rod passing through the first push rod and threadedly connected to the first push rod, a threaded tube rotatably mounted in the first push rod, and the end of the threaded tube away from the first push rod passing through the second push rod and threadedly connected to the second push rod.

[0013] Preferably, the threaded rod has two sets of symmetrically distributed keyways, and the threaded tube has two sets of symmetrically distributed key blocks. The key blocks and keyways are correspondingly arranged, and the threaded tube is slidably sleeved with the threaded rod through the key blocks and keyways.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides a thin-walled stainless steel pipe straightening device, which has the following advantages:

[0016] The slide pulls the rack, driving the second gear and rotating rod to rotate, disengaging the pawl from the ratchet. At this point, the upper mounting shaft can rotate freely. The mounting shaft, through the meshing of the gear ring and the first gear, drives multiple sets of adjusting brackets to rotate synchronously, thus precisely adjusting the enclosing radius of multiple sets of abutments to adapt to the pipe alignment requirements of different diameters. After adjustment, the slide is released, and the torsion spring and spring's reset action causes the pawl to re-engage the ratchet, locking the mounting shaft position and ensuring the abutments remain stable during the repair process, preventing displacement due to external forces and improving alignment accuracy. The motor inside the mounting rod drives the threaded rod to rotate. The linkage design between the threaded rod and the threaded pipe enables the staged advancement of the first and second push rods, allowing the mounting seat to smoothly extend into the pipe. At the same time, the cooperation between the key block and the keyway ensures that the threaded pipe rotates synchronously with the threaded rod, avoiding jamming during the feeding process. The motor fixedly installed inside the second push rod drives the mounting seat and the abutment to rotate, dynamically crushing the concave area of ​​the pipe wall, effectively eliminating local dents and evenly dispersing stress, avoiding secondary damage caused by traditional hammering repair. The synergistic effect of rotation and feeding significantly improves the roundness restoration effect of thin-walled pipes, making it especially suitable for deep or complex deformation repair. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the feeding mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the adjustment mechanism of this utility model;

[0021] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point A in the diagram.

[0022] In the diagram: 1. Bracket; 2. Mounting rod; 3. First push rod; 4. Second push rod; 5. Mounting seat; 6. Support column; 7. Feeding mechanism; 701. Threaded rod; 702. Keyway; 703. Threaded tube; 704. Key block; 8. Adjusting mechanism; 801. Mounting ring; 802. Gear ring; 803. Adjusting bracket; 804. Mounting shaft; 805. First gear; 806. Ratchet; 807. Pawl; 808. Rotating rod; 809. Torsion spring; 810. Second gear; 811. Rack; 812. Slide; 813. Slide rod; 814. Spring. Detailed Implementation

[0023] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0024] Figures 1-4 In one embodiment of this utility model, a thin-walled stainless steel pipe straightening device includes a bracket 1 and a mounting base 5. The mounting base 5 has multiple sets of annularly distributed abutments 6. A mounting rod 2 is fixedly mounted on the bracket 1. A first push rod 3 is slidably mounted inside the mounting rod 2, and a second push rod 4 is slidably mounted inside the first push rod 3. The mounting base 5 is rotatably mounted on the second push rod 4 via a rotating shaft. The mounting base 5 has an adjusting mechanism 8 for adjusting the position of the abutments 6. The mounting rod 2 has a feeding mechanism 7. The adjusting mechanism 8 includes a mounting ring 801 rotatably mounted inside the mounting base 5, and a toothed ring 802 is sleeved on the mounting ring 801. The mounting base 5 has... Multiple sets of annularly distributed adjusting brackets 803 correspond to the number of abutment posts 6. The abutment posts 6 are fixedly installed on the corresponding adjusting brackets 803. All sets of adjusting brackets 803 are rotatably connected to the mounting base 5 via mounting shafts 804. The multiple sets of mounting shafts 804 are annularly distributed around the mounting ring 801, and each set of mounting shafts 804 is fitted with a first gear 805. The multiple sets of first gears 805 are meshed with the gear ring 802. Two sets of symmetrically distributed ratchet wheels 806 are fitted onto the upper mounting shaft 804. The rack 811 is pulled by the slide 812, which drives the second gear 810 and the rotating rod 808 to rotate, causing the pawl 807 to disengage from the ratchet wheel. At 806, the upper mounting shaft 804 can be freely rotated. The mounting shaft 804, through the meshing of the gear ring 802 and the first gear 805, drives multiple sets of adjusting brackets 803 to rotate synchronously, thereby precisely adjusting the enclosing radius of multiple sets of abutments 6 to adapt to the pipe correction requirements of different pipe diameters. After adjustment, the slide 812 is released, and the reset action of the torsion spring 809 and spring 814 causes the pawl 807 to re-engage the ratchet 806, locking the position of the mounting shaft 804. This ensures the abutments 6 remain stable during the repair process, avoiding displacement caused by external forces and improving correction accuracy. The motor inside the mounting rod 2 drives the threaded rod 701 to rotate. The linkage design with the threaded pipe 703 enables the first push rod 3 and the second push rod 4 to advance in stages, allowing the mounting seat 5 to smoothly extend into the pipe. At the same time, the cooperation between the key block 704 and the keyway 702 ensures that the threaded pipe 703 rotates synchronously with the threaded rod 701, avoiding jamming during the feeding process. The motor fixedly installed inside the second push rod 4 drives the mounting seat 5 and the abutment 6 to rotate, dynamically crushing the concave area of ​​the pipe wall, effectively eliminating local dents and evenly dispersing stress, avoiding secondary damage caused by traditional hammering repair. The synergistic effect of rotation and feeding significantly improves the roundness restoration effect of thin-walled pipes, and is especially suitable for deep or complex deformation repair.

[0025] In this embodiment, reference Figure 3 , Figure 4As shown, the mounting base 5 has two sets of pawls 807 that mesh with the ratchet 806. Both sets of pawls 807 are rotatably connected to the mounting base 5 via rotating rods 808. A torsion spring 809 is sleeved on the mounting base 5, with both ends of the torsion spring 809 fixedly connected to the pawls 807 and the mounting base 5, respectively. A second gear 810 is sleeved on each of the two rotating rods 808. Two sets of racks 811 that mesh with the second gears 810 are slidably installed in the mounting base 5. A slide 812 is slidably installed in the mounting base 5, with the slide 812 fixedly connected to both sets of racks 811. A slide rod 813 corresponding to the slide rod 812 is fixedly installed in the mounting base 5, with the slide rod 812 and slide rod 813 slidably sleeved. Two sets of symmetrically distributed springs 814 are sleeved on the slide rod 813, with both ends of the two sets of springs 814 connected to the slide rod 812. 2 and mounting base 5 are fixedly connected. In the initial state, by pulling the slide 812, the two sets of racks 811 are moved. The racks 811 mesh with the second gear 810, causing the rotating rod 808 to rotate and forcing the pawl 807 to disengage from the ratchet 806, thus releasing the lock on the mounting shaft 804. At this time, the mounting shaft 804 above can be rotated manually or with the help of tools. Through the meshing and linkage of the gear ring 802 with multiple sets of first gears 805, all the adjusting brackets 803 are driven to deflect synchronously, thereby adjusting the unfolding angle and enclosure radius of multiple sets of abutments 6 to adapt to the pipe correction requirements of different pipe diameters. After the adjustment is completed, the slide 812 is released. Under the reset action of the torsion spring 809 and the spring 814, the pawl 807 re-engages the ratchet 806, locking the position of the mounting shaft 804 and ensuring that the abutments 6 remain stable in the subsequent correction process.

[0026] In this embodiment, reference Figure 2As shown, the feeding mechanism 7 includes a threaded rod 701 rotatably installed in the mounting rod 2. The end of the threaded rod 701 away from the mounting rod 2 passes through the first push rod 3 and is threadedly connected to the first push rod 3. A threaded tube 703 is rotatably installed in the first push rod 3. The end of the threaded tube 703 away from the first push rod 3 passes through the second push rod 4 and is threadedly connected to the second push rod 4. Two sets of symmetrically distributed keyways 702 are provided on the threaded rod 701. Two sets of symmetrically distributed key blocks 704 are provided in the threaded tube 703. The key blocks 704 and keyways 702 are correspondingly arranged. The threaded tube 703 is slidably sleeved with the threaded rod 701 through the key blocks 704 and keyways 702. During the calibration process, the drive mechanism in the mounting rod 2 is activated, driving the threaded rod 701 to rotate. Due to the cooperation of the key blocks 704 and keyways 702, the threaded tube 703 rotates synchronously with the threaded rod 701, and pushes the first push rod 3 and the second push rod 4 to feed in stages, so that the mounting seat 5 can be smoothly extended into the pipe. Simultaneously, the drive mechanism within the second push rod 4 drives the mounting base 5 and multiple sets of abutments 6 to rotate, dynamically compacting the deformed areas of the pipe's inner wall. During rotation, the abutments 6 apply force evenly, gradually eliminating dents and restoring the pipe's roundness, thus avoiding localized stress concentration. This combination of two-stage feeding and rotary compaction ensures both the accuracy of the correction and the effective repair of deep deformations, significantly improving the repair quality of thin-walled stainless steel pipes.

[0027] In this embodiment, during operation, in the initial state, pulling the slide 812 moves the two sets of racks 811. The racks 811 mesh with the second gear 810, causing the rotating rod 808 to rotate and forcing the pawl 807 to disengage from the ratchet 806, thus releasing the lock on the mounting shaft 804. At this time, manually or with the aid of tools, the upper mounting shaft 804 can be rotated. Through the meshing and linkage of the gear ring 802 with multiple sets of first gears 805, all adjusting brackets 803 are driven to deflect synchronously, thereby adjusting the unfolding angle and enclosing radius of multiple sets of abutments 6 to adapt to pipes of different diameters. After the adjustment is completed, the slide 812 is released. Under the reset action of the torsion spring 809 and the spring 814, the pawl 807 re-engages the ratchet 806, locking the position of the mounting shaft 804 and ensuring that the abutment 6 remains stable during subsequent adjustment. During the adjustment process, the drive mechanism inside the mounting rod 2 is activated, driving the threaded rod 701 to rotate. Due to the cooperation between the key block 704 and the keyway 702, the threaded tube 703 rotates synchronously with the threaded rod 701, pushing the first push rod 3 and the second push rod 4 to feed in stages, allowing the mounting seat 5 to smoothly extend into the pipe. At the same time, the drive mechanism inside the second push rod 4 drives the mounting seat 5 and multiple sets of abutments 6 to rotate, dynamically rolling the deformed area of ​​the pipe's inner wall. The abutments 6 apply force evenly during rotation, gradually eliminating dents and restoring the pipe's roundness, avoiding local stress concentration. The combination of two-stage feeding and rotational rolling ensures the accuracy of the adjustment and effectively repairs deep deformations, significantly improving the repair quality of thin-walled stainless steel pipes.

[0028] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0029] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thin-walled stainless steel pipe correcting device comprising a bracket (1) and a mounting seat (5), characterized in that: The mounting base (5) is provided with multiple sets of ring-shaped abutments (6), the bracket (1) is fixedly installed with a mounting rod (2), a first push rod (3) is slidably installed in the mounting rod (2), a second push rod (4) is slidably installed in the first push rod (3), the mounting base (5) is rotatably installed on the second push rod (4) through a rotating shaft, the mounting base (5) is provided with an adjustment mechanism (8) for adjusting the position of the abutments (6), and the mounting rod (2) is provided with a feeding mechanism (7); The adjustment mechanism (8) includes a mounting ring (801) rotatably mounted in the mounting base (5), a gear ring (802) sleeved on the mounting ring (801), and multiple sets of annularly distributed adjustment frames (803) provided in the mounting base (5). The number of adjustment frames (803) corresponds to the number of abutments (6). The abutments (6) are fixedly mounted on the corresponding adjustment frames (803). Multiple sets of adjustment frames (803) are rotatably connected to the mounting base (5) through mounting shafts (804). Multiple sets of mounting shafts (804) are annularly distributed around the mounting ring (801), and multiple sets of mounting shafts (804) are sleeved with first gears (805). Multiple sets of first gears (805) are meshed with the gear ring (802). Two sets of symmetrically distributed ratchet wheels (806) are sleeved on the upper mounting shaft (804).

2. A thin-wall stainless steel pipe correcting device according to claim 1, characterized in that: The mounting base (5) is provided with two sets of pawls (807) that mesh with the ratchet (806). Both sets of pawls (807) are rotatably connected to the mounting base (5) through the rotating rod (808). A torsion spring (809) is sleeved on the mounting base (5). The two ends of the torsion spring (809) are fixedly connected to the pawls (807) and the mounting base (5) respectively. A second gear (810) is sleeved on both sets of rotating rods (808).

3. A thin-wall stainless steel pipe correcting device according to claim 1, characterized in that: Two sets of racks (811) that mesh with the second gear (810) are slidably installed in the mounting base (5). A slide (812) is slidably installed in the mounting base (5). The slide (812) is fixedly connected to the two sets of racks (811) respectively. A slide rod (813) corresponding to the slide (812) is fixedly installed in the mounting base (5).

4. A thin-wall stainless steel pipe correcting device according to claim 3, characterized in that: The slide (812) is slidably connected to the slide rod (813), and two sets of symmetrically distributed springs (814) are sleeved on the slide rod (813). The two ends of the two sets of springs (814) are fixedly connected to the slide (812) and the mounting base (5) respectively.

5. The thin-walled stainless steel pipe straightening device according to claim 1, characterized in that: The feeding mechanism (7) includes a threaded rod (701) rotatably installed in the mounting rod (2). The end of the threaded rod (701) away from the mounting rod (2) passes through the first push rod (3) and is threadedly connected to the first push rod (3). A threaded tube (703) is rotatably installed in the first push rod (3). The end of the threaded tube (703) away from the first push rod (3) passes through the second push rod (4) and is threadedly connected to the second push rod (4).

6. A thin-walled stainless steel pipe straightening device according to claim 5, characterized in that: The threaded rod (701) has two sets of symmetrically distributed keyways (702), and the threaded tube (703) has two sets of symmetrically distributed key blocks (704). The key blocks (704) and keyways (702) are arranged correspondingly, and the threaded tube (703) is slidably sleeved with the threaded rod (701) through the key blocks (704) and keyways (702).

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