Device for preventing circular pipe from deforming in welding process
The design of the weld constraint mechanism, including connectors and telescopic fittings, solves the problem of round pipe deformation during welding, achieving efficient support and welding of round pipes. It is applicable to round pipes of different diameters, reduces costs and operational difficulty, and improves product quality.
Patent Information
- Application Number
- CN202520330402.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Existing technologies often produce concave defects after welding round tubes, resulting in products that do not meet production requirements. Furthermore, existing equipment has limited applicability, high costs, and is difficult to operate, making it an unsolvable problem.
A device is provided to prevent deformation of a circular tube during welding. The device includes a weld constraint mechanism, which includes a connector and two sets of telescopic tubes. One end of the telescopic tube is connected inward to the connector, and the other end is connected to the constraint. The arc-shaped plate of the constraint is aligned with the arc surface of the circular tube, and the arc surface of the constraint fits against the inner wall of the circular tube. The telescopic tube can control the tight fit between the constraint and the inner wall of the circular tube. The length of the telescopic tube is adjustable. A connecting ring and a connecting rod are used together. The device is suitable for circular tubes of different diameters.
It effectively avoids deformation of round tubes during welding, improves the roundness and welding efficiency of round tubes, reduces production costs, has a wide range of applications, is easy to operate, and is suitable for round tubes of small and large diameters, especially products with high forming difficulty such as titanium tubes. It avoids product misalignment and concavity problems caused by stress release after welding.
Smart Images
Figure CN223833838U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pipeline support technology, specifically relating to a device for preventing deformation of a circular pipe during the welding process. Background Technology
[0002] Round tubes are prone to concavity after welding, which prevents them from being fully rounded, resulting in products that do not meet production requirements. Current technology typically uses support rods or rectangular tubes with jacks for post-weld straightening, which is difficult to implement, carries a high risk, is costly, and yields unsatisfactory results. Common round tube straightening equipment on the market is usually only suitable for round tubes with diameters of 168-1524mm, and cannot straighten tubes with diameters greater than 1524mm. Equipment for straightening round tubes with diameters greater than 1524mm is not only expensive but also difficult to operate, and the actual finishing effect cannot meet expectations. Utility Model Content
[0003] In order to overcome the shortcomings of the prior art, this utility model provides a device to prevent the deformation of round tubes during the welding process, which can improve the roundness of round tubes and welding efficiency, and reduce production costs.
[0004] This utility model is achieved through the following technical solution.
[0005] This utility model provides a device for preventing deformation of a circular tube during welding, including a weld constraint mechanism. The weld constraint mechanism includes a connector and two sets of telescopic tubes. The two sets of telescopic tubes are symmetrically connected to both sides of the connector. One end of each telescopic tube is connected inward to the connector, and the other end of each telescopic tube is connected outward to a constraint member. The outward end of the constraint member is an arc surface that can fit against the inner wall of the circular tube. The telescopic tube can control the outer end face of the constraint member to fit against the inner wall of the circular tube.
[0006] As a further improvement to the above solution, the weld constraint mechanism is provided in at least two sets, and the connecting parts are connected to each other by connecting rods.
[0007] As a further improvement to the above solution, the connecting member is a connecting ring, which is sleeved on the connecting rod, and the connecting ring is provided with a bolt handle for fixing the connecting ring to the connecting rod.
[0008] As a further improvement to the above solution, the telescopic fitting includes an outer tube, an inner rod disposed inside the outer tube and capable of moving inward or outward relative to the outer tube, and an adjustment assembly for controlling the inward or outward movement of the inner rod.
[0009] As a further improvement to the above solution, the adjustment assembly includes a rotary joint and a fixed joint arranged coaxially. The rotary joint is threadedly connected to the inner rod, and the fixed joint is located at the upper end of the outer tube. A rotating protrusion is provided at the lower part of the rotary joint. The fixed joint is a hollow structure with a smooth inner wall. A groove is provided on the inner wall of the fixed joint corresponding to the rotating protrusion. The rotating protrusion can rotate in the groove. A limiting block is provided on the side wall of the rotary joint. The limiting block is located above the rotating protrusion. The upper surface of the rotating protrusion is in contact with the upper surface of the groove, and the lower surface of the limiting block is in contact with the upper surface of the fixed joint. The inner wall of the outer tube is a smooth surface.
[0010] As a further improvement to the above solution, the rotary joint is provided with a rotary handle.
[0011] As a further improvement to the above solution, the rotary joint is provided with an external hexagonal structure.
[0012] As a further improvement to the above solution, the rotary joint, rotary handle and external hexagonal structure are integrated into one unit.
[0013] As a further improvement to the above solution, the constraint member is an arc-shaped plate whose outer end face can fit against the inner wall of the circular tube, and the outward end of the inner rod and the inward end of the arc-shaped plate are fixedly connected.
[0014] As a further improvement to the above solution, the inner rod has a fixing groove at its outward end, and the arc plate can be embedded in the fixing groove at its inward end. Both the inner rod and the arc plate have fixing screw holes, and fixing bolts and fixing nuts are provided corresponding to the fixing screw holes. The inner rod and the arc plate are detachably and fixedly connected by fixing bolts and fixing nuts.
[0015] The beneficial effects of this utility model are:
[0016] Compared with existing technologies, the weld constraint mechanism in this invention effectively prevents deformation of the circular tube during welding. The telescopic fitting ensures a tight fit between the constraint component and the inner wall of the circular tube, and its length can be adjusted according to different tube diameters. The arc-shaped design of the outer end face of the constraint component provides effective support to the inner wall of the circular tube. The connecting ring can be used in conjunction with the connecting rod. The number of weld constraint mechanisms can be adjusted and selected according to the length of the circular tube. Using multiple sets of weld constraint mechanisms together provides better support for the circular tube. Furthermore, this device has a simple overall structure and low cost. It is easy to operate, has a wide range of applications, and is easy to implement. It is suitable for products with high forming difficulty, such as small-diameter, large-diameter, and titanium tubes. It effectively avoids problems such as misalignment and concavity caused by stress release after welding. In practical use, it effectively improves product quality and significantly reduces labor and time costs. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the connecting rod in this utility model;
[0019] Figure 3 This is a schematic diagram of the structure of this utility model in use;
[0020] Figure 4 This is a schematic diagram of the weld constraint mechanism in this utility model;
[0021] Figure 5 This is a schematic diagram of the weld constraint mechanism from another perspective in this practical application;
[0022] Figure 6 This is a schematic diagram of the internal structure of the weld constraint mechanism in this utility model;
[0023] Figure 7 This is a schematic diagram of the structure of this utility model;
[0024] Figure 8 This is a schematic diagram of the structure of the adjustment component in this utility model;
[0025] Figure 9 This is a schematic diagram of the adjustment component from another perspective in this utility model;
[0026] Figure 10 This is a schematic diagram of the rotary joint in this utility model;
[0027] Figure 11 This is a schematic diagram of the fixed connector in this utility model.
[0028] In the diagram: Connector 1, Connecting Ring 101, Telescopic Pipe 2, Constraint 3, Arc Plate 301, Round Pipe 4, Connecting Rod 5, Bolt Handle 6, Outer Pipe 7, Inner Rod 8, Fixing Groove 801, Adjustment Assembly 9, Rotary Joint 10, Fixed Joint 11, Slide 1101, Rotating Protrusion 12, Limiting Block 13, Rotating Handle 14, External Hexagonal Structure 15, Fixing Bolt 16, Fixing Nut 17. Detailed Implementation
[0029] To further illustrate the technical solution of this utility model, the following description is provided in conjunction with the accompanying drawings and embodiments.
[0030] like Figures 1 to 11As shown, a device for preventing deformation of a circular tube during welding includes a weld constraint mechanism. The weld constraint mechanism includes a connector 1 and two sets of telescopic tubes 2. The two sets of telescopic tubes 2 are symmetrically connected to both sides of the connector 1. One end of the telescopic tube 2 is connected inward to the connector 1, and the other end of the telescopic tube 2 is connected outward to a constraint member 3. The outward end of the constraint member 3 is an arc surface that can fit against the inner wall of the circular tube 4. The telescopic tube 2 can control the outer end face of the constraint member 3 to fit against the inner wall of the circular tube 4.
[0031] Furthermore, at least two sets of weld restraint mechanisms are provided. The number of weld restraint mechanisms can be selected according to the actual length of the circular tube. Each weld restraint mechanism is independent of the others and can be operated and used individually inside the circular tube to support the weld of the circular tube.
[0032] Furthermore, at least two sets of weld seam restraint mechanisms are provided, with the connecting parts 1 connected to each other via connecting rods 5. The number of weld seam restraint mechanisms can be selected according to the actual length of the circular pipe. In addition, a bracket is provided corresponding to the connecting rod 5. The bracket can be a lifting frame, which can be used to adjust the position and height of the connecting rod 5, or it can be a bracket with sufficient strength to maintain the connecting rod 5 at a fixed height, such as a steel bracket. The purpose of the bracket is to further improve the convenience of installation and use of the device and reduce the workload of the operators.
[0033] Furthermore, the connecting component 1 is a connecting ring 101, which is sleeved on the connecting rod 5. The connecting ring 101 is provided with a bolt handle 6 for fixing the connecting ring 101 to the connecting rod 5. The connecting ring 101 and the connecting rod 5 are slidably connected. By rotating the bolt handle 6, the connecting ring 101 can be fixed to the connecting rod 5 to prevent the connecting ring 101 from loosening.
[0034] Specifically, in this example, the telescopic fitting 2 includes an outer tube 7, an inner rod 8 disposed inside the outer tube 7 and capable of moving inward or outward relative to the outer tube 7, and an adjustment assembly 9 for controlling the inward or outward movement of the inner rod 8.
[0035] Specifically, in this example, the adjustment assembly 9 includes a rotary joint 10 and a fixed joint 11 arranged coaxially. The rotary joint 10 is threadedly connected to the inner rod 8. The fixed joint 11 is located at the upper end of the outer tube 7. A rotating protrusion 12 is provided at the lower part of the rotary joint 10. The fixed joint 11 is a hollow structure with a smooth inner wall. A groove 1101 is provided on the inner wall of the fixed joint 11 corresponding to the rotating protrusion 12. The rotating protrusion 12 can rotate in the groove 1101. A limiting block 13 is provided on the side wall of the rotary joint 10. The limiting block 13 is located above the rotating protrusion 12. The upper surface of the rotating protrusion 12 is in contact with the upper surface of the groove 1101. The lower surface of the limiting block 13 is in contact with the upper surface of the fixed joint 11. The inner wall of the outer tube 7 is a smooth surface.
[0036] Specifically, the fixed connector 11 is integrally set with the upper end of the outer tube 7, welded together, or assembled together in a relatively fixed position.
[0037] Specifically, the rotary joint 10, the fixed joint 11, the inner rod 8, and the outer tube 7 are all coaxially arranged. The rotary joint 10 and the inner rod 8 are threaded together. The rotation of the rotary joint 10 controls the vertical rise or fall of the inner rod 8, and the outer tube 7 plays a certain guiding role.
[0038] Specifically, when the rotary joint 10 rotates, the rotating protrusion 12 rotates in the slide groove 1101, the outer tube 7 and the fixed joint 11 are relatively fixed in position, and the inner rod 8 only rises or falls vertically without rotating. The rise or fall of the inner rod 8 drives the constraint member 3 to move towards the inner wall of the corresponding round tube 4 until the arc surface of the outer end of the constraint member 3 is tightly fitted with the inner wall.
[0039] Furthermore, the upper part of the fixed joint 11 has a semi-open structure to reduce friction between the rotating protrusion 12 and the slide groove 1101.
[0040] Furthermore, a rotary handle 14 is provided on the rotary joint 10. The rotary handle 14 allows the operator to easily adjust the relative height of the inner rod 8.
[0041] Furthermore, the rotary joint 10 is provided with an external hexagonal structure 15. The external hexagonal structure 15 is provided so that when the top arc surface of the constraint member 3 is initially attached to the inner wall of the round tube 4, and it is difficult to rotate the rotary handle 14 manually, auxiliary tools such as wrenches can be used to further tighten it, thereby improving the stability of the support and preventing the support from loosening.
[0042] Furthermore, the rotary joint 10, the rotary handle 14, and the external hexagonal structure 15 are integrated into one unit.
[0043] Specifically, the constraint member 3 is an arc-shaped plate 301 whose outer end face can fit against the inner wall of the round tube 4, and the outward end of the inner rod 8 and the inward end of the arc-shaped plate 301 are fixedly connected.
[0044] Specifically, the inner rod 8 has a fixing groove 801 at its outward end, and the arc plate 301 can be inserted into the fixing groove 801 at its inward end. Both the outward end of the inner rod 8 and the arc plate 301 have fixing screw holes, with fixing bolts 16 and fixing nuts 17 corresponding to these holes. The inner rod 8 and the arc plate 301 are detachably and securely connected via the fixing bolts 16 and fixing nuts 17. This detachable and secure connection between the inner rod 8 and the arc plate 301, achieved through the fixing groove 801, fixing screw holes, fixing bolts 16, and fixing nuts 17, facilitates subsequent maintenance and replacement of the arc plate 301.
[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.
[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A device for preventing deformation of a circular tube during welding, characterized in that: It includes a weld constraint mechanism, which includes a connector (1) and two sets of telescopic tubes (2). The two sets of telescopic tubes (2) are symmetrically connected to both sides of the connector (1). One end of the telescopic tube (2) is connected to the connector (1) inward, and the other end of the telescopic tube (2) is connected to a constraint member (3) outward. The outward end of the constraint member (3) is an arc surface that can fit against the inner wall of the round tube (4). The telescopic tube (2) can control the outer end face of the constraint member (3) to fit against the inner wall of the round tube (4).
2. The device for preventing deformation of a circular tube during welding according to claim 1, characterized in that: The weld constraint mechanism is provided in at least two sets, and the connecting parts (1) are connected to each other by connecting rods (5).
3. The device for preventing deformation of a circular tube during welding according to claim 2, characterized in that: The connector (1) is a connecting ring (101), which is sleeved on the connecting rod (5). The connecting ring (101) is provided with a bolt handle (6) for fixing the connecting ring (101) to the connecting rod (5).
4. The device for preventing deformation of a circular tube during welding according to claim 1, characterized in that: The telescopic tube (2) includes an outer tube (7), an inner rod (8) disposed inside the outer tube (7) and capable of moving inward or outward relative to the outer tube (7), and an adjustment assembly (9) for controlling the inward or outward movement of the inner rod (8).
5. The device for preventing deformation of a circular tube during welding according to claim 4, characterized in that: The adjustment assembly (9) includes a rotary joint (10) and a fixed joint (11) arranged coaxially. The rotary joint (10) is threadedly connected to the inner rod (8). The fixed joint (11) is located at the upper end of the outer tube (7). A rotating protrusion (12) is provided at the lower part of the rotary joint (10). The fixed joint (11) is a hollow structure with a smooth inner wall. A groove (1101) is provided on the inner wall of the fixed joint (11) corresponding to the rotating protrusion (12). The rotating protrusion (12) can rotate in the groove (1101). A limiting block (13) is provided on the side wall of the rotary joint (10). The limiting block (13) is located above the rotating protrusion (12). The upper surface of the rotating protrusion (12) is in contact with the upper surface of the groove (1101). The lower surface of the limiting block (13) is in contact with the upper surface of the fixed joint (11). The inner wall of the outer tube (7) is a smooth surface.
6. The device for preventing deformation of a circular tube during welding according to claim 5, characterized in that: The rotary joint (10) is provided with a rotary handle (14).
7. The device for preventing deformation of a circular tube during welding according to claim 6, characterized in that: The rotary joint (10) is provided with an external hexagonal structure (15).
8. The device for preventing deformation of a circular tube during welding according to claim 7, characterized in that: The rotary joint (10), rotary handle (14), and external hexagonal structure (15) are integrated into one unit.
9. The device for preventing deformation of a circular tube during welding according to claim 4, characterized in that: The constraint member (3) is an arc-shaped plate (301) whose outer end face can fit against the inner wall of the round tube (4), and the outward end of the inner rod (8) and the inward end of the arc-shaped plate (301) are fixedly connected.
10. The device for preventing deformation of a circular tube during welding according to claim 9, characterized in that: The inner rod (8) has a fixing groove (801) at one end facing outwards, and the arc plate (301) can be embedded in the fixing groove (801) at one end facing inwards. The inner rod (8) and the arc plate (301) are both provided with fixing screw holes. Fixing bolts (16) and fixing nuts (17) are provided corresponding to the fixing screw holes. The inner rod (8) and the arc plate (301) are detachably and fixedly connected by fixing bolts (16) and fixing nuts (17).