A small-caliber thin-wall straight-seam submerged-arc welded steel pipe pre-welding weld positioning structure

Abstract

The utility model discloses a kind of small-bore thin-wall straight-seam submerged-arc welding steel pipe pre-welding weld positioning structure, including workbench, workbench one end upper part is fixed with support seat, and support seat is fixed with the inner support rod that penetrates, and multiple positioning rods are telescopically installed on the inner support rod upper part, and clamping rod is movably installed on workbench and located at the both sides of inner support rod, by being sleeved on inner support rod before welding, the gap of steel pipe is aligned at the positioning rod place and is sleeved, so that in steel pipe is sleeved on inner support rod, multiple positioning rods will be located in gap and left and right positioning gap to prevent deflection, it is convenient to weld positioning, it is convenient to weld fast positioning when batch production, the both sides of steel pipe are clamped by the clamping rod of both sides, positioning rod is retracted inside inner support rod while clamping, it is convenient to weld closed when clamping weld positioning, ensure that weld position is correct, improve processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of welding, specifically a pre-welded weld positioning structure for small-diameter, thin-walled, straight-seam submerged arc welded steel pipes. Background Technology

[0002] Small-diameter, thin-walled, straight-seam submerged arc welded steel pipes are widely used in oil and gas transportation and building structures. By rolling steel plates into tubular shapes and then welding the straight seams using submerged arc welding technology, these pipes offer high precision and stable weld quality, making them widely applicable in fluid transportation and structural engineering. In their manufacturing process, pre-welding is a crucial step that lays the foundation for the actual submerged arc welding; the positioning accuracy of the pre-welded seam directly affects the subsequent welding quality and the overall performance of the steel pipe.

[0003] When welding small-diameter, thin-walled, straight-seam submerged arc welded steel pipes, it is inconvenient to align the weld seam and the weld joint with the center line, making it difficult to ensure the correct position of the weld seam. This can easily lead to weld deviation and make it difficult to quickly align and position the weld seam during batch welding. Utility Model Content

[0004] The purpose of this utility model is to provide a pre-welded weld positioning structure for small-diameter thin-walled straight-seam submerged arc welded steel pipes, so as to solve the technical problem of inconvenient positioning during welding of small-diameter thin-walled straight-seam submerged arc welded steel pipes.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A positioning structure for pre-welded weld seams of small-diameter thin-walled straight-seam submerged arc welded steel pipes includes a workbench. A support base is fixed to the upper part of one end of the workbench, and an inner support rod is fixed through the support base. Multiple positioning rods are telescopically installed on the upper part of the inner support rod, and the multiple positioning rods are distributed in a linear array on the inner support rod. Clamping rods are movably installed on both sides of the inner support rod on the workbench, and the two clamping rods on one side of the inner support rod are both designed with a shape corresponding to the inner support rod.

[0007] As a further embodiment of this utility model, side plates are fixedly installed on both sides of the upper part of the workbench, and the two clamping rods are telescopically connected to the two side plates on opposite sides.

[0008] As a further embodiment of this utility model, two No. 1 cylinders are fixedly installed on both sides of the upper part of the workbench, and one end of the piston rod of the No. 1 cylinder slides through the side plate and is fixedly connected to the clamping rod.

[0009] As a further embodiment of this utility model, the upper surface of the inner support rod is provided with multiple telescopic holes in a linear manner, and multiple positioning rods are telescopically installed in the multiple telescopic holes respectively.

[0010] As a further embodiment of this utility model, an installation hole is provided through one end of the inner support rod. The installation hole is rectangular, and multiple telescopic holes are all connected to the installation hole. An adjustment rod is slidably installed in the installation hole.

[0011] As a further preferred embodiment of this utility model, the adjusting rod is located on one side of the positioning rod, and an adjusting port is provided at each adjusting rod. A second cylinder for pushing the adjusting rod to slide is fixedly installed at one end of the mounting hole.

[0012] As a further embodiment of this utility model, each of the multiple positioning rods has a movable wheel installed at one end of its mounting hole, and the same side of the multiple adjustment ports is set as an inclined surface, with the multiple movable wheels cooperating with the inclined surfaces of the multiple adjustment ports respectively.

[0013] As a further embodiment of this utility model, a limiting plate is fixed to one end of each of the multiple positioning rods located in the mounting hole, and a spring is sleeved on the outside of each of the multiple positioning rods. The two ends of the multiple springs are respectively fixedly connected to one side of the limiting plate and the top of the mounting hole.

[0014] Compared with existing technologies, the pre-welded weld positioning structure for small-diameter, thin-walled, straight-seam submerged arc welded steel pipes provided by this utility model has the following beneficial effects:

[0015] This invention involves fitting a steel pipe onto an inner support rod before welding. During fitting, the gap in the steel pipe is aligned with the positioning rod. After the steel pipe is fitted onto the inner support rod, multiple positioning rods are positioned within the gap to prevent skewing and facilitate weld positioning. This allows for rapid weld positioning during mass production. The steel pipe is clamped on both sides by clamping rods. While clamping, the positioning rods are retracted into the inner support rod, facilitating weld closure and positioning during clamping. This ensures correct weld position and improves processing efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0019] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4This is an exploded structural diagram of an embodiment of the present utility model.

[0021] Reference numerals in the attached diagram: 1. Workbench; 2. Support base; 3. Inner support rod; 4. Side plate; 5. Cylinder No. 1; 6. Clamping rod; 7. Telescopic hole; 8. Positioning rod; 9. Mounting hole; 10. Adjusting rod; 11. Spring; 12. Limiting plate; 13. Moving wheel; 14. Cylinder No. 2; 15. Adjustment port. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0023] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention should be understood according to the specific circumstances.

[0025] See Figure 1-4 As shown in the figure, an embodiment of the present invention provides a pre-welded weld positioning structure for a small-diameter thin-walled straight-seam submerged arc welded steel pipe, including a workbench 1. A support base 2 is fixed to the upper part of one end of the workbench 1. An inner support rod 3 is fixedly inserted through the support base 2. Multiple positioning rods 8 are telescopically installed on the upper part of the inner support rod 3. The multiple positioning rods 8 are arranged in a linear array on the inner support rod 3. Clamping rods 6 are movably installed on both sides of the inner support rod 3 on the workbench 1. The two clamping rods 6 on one side of the inner support rod 3 are both designed with a shape corresponding to the inner support rod 3.

[0026] Before welding, the steel pipe is fitted onto the inner support rod 3. During fitting, the gap of the steel pipe is aligned with the positioning rod 8. After the steel pipe is fitted onto the inner support rod 3, multiple positioning rods 8 will be located within the gap to position the gap left and right to prevent skewing, which facilitates the positioning of the weld. This makes it easier to quickly position the weld during mass production. The steel pipe is clamped on both sides by the clamping rods 6. While clamping, the positioning rods 8 are retracted into the inner support rod 3 to facilitate the closure of the weld during clamping and to position the weld, ensuring the correct position of the weld and improving processing efficiency.

[0027] To facilitate the clamping rods 6 clamping the steel pipe and closing the gap, side plates 4 are fixedly installed on both sides of the upper part of the workbench 1. The two opposite sides of the two clamping rods 6 are telescopically connected to the two side plates 4 respectively for easy positioning.

[0028] To facilitate the extension and retraction of the clamping rod 6 for clamping, two No. 1 cylinders 5 are fixedly installed on both sides of the upper part of the worktable 1. One end of the piston rod of the No. 1 cylinder 5 slides through the side plate 4 and is fixedly connected to the clamping rod 6. By starting the No. 1 cylinder 5, the clamping rod 6 is pushed to extend and retract on the side plate 4, thereby improving the clamping and positioning efficiency.

[0029] The upper surface of the inner support rod 3 has multiple telescopic holes 7 linearly arranged, and multiple positioning rods 8 are respectively telescopically installed in the multiple telescopic holes 7. In order to allow the positioning rods 8 to retract into the inner support rod 3 when the weld is closed, the telescopic holes 7 are provided to allow the positioning rods 8 to extend and retract within them, thereby retracting the positioning rods 8 into the telescopic holes 7, achieving the purpose of retracting the positioning rods 8, which facilitates rapid positioning and welding.

[0030] To facilitate the rapid and synchronous retraction of multiple positioning rods 8, an installation hole 9 is provided at one end of the inner support rod 3. The installation hole 9 is rectangular, and multiple telescopic holes 7 extend into the installation hole 9. An adjusting rod 10 is slidably installed in the installation hole 9. The multiple positioning rods 8 can be driven to extend and retract within the telescopic holes 7 by sliding the adjusting rod 10 in the installation hole 9, thereby facilitating the closure of the steel pipe weld.

[0031] The adjusting rod 10 is located on one side of the positioning rod 8. Each adjusting rod 10 has an adjusting port 15. A second cylinder 14 for pushing the adjusting rod 10 to slide is fixedly installed at one end in the mounting hole 9. In order for the adjusting rod 10 to control the extension and retraction of the positioning rod 8, the second cylinder 14 is used to push the adjusting rod 10 to slide. Under the push of the adjusting port 15, multiple positioning rods 8 extend and retract synchronously in the extension and retraction hole 7.

[0032] Each of the multiple positioning rods 8 has a movable wheel 13 installed at one end inside the mounting hole 9. The multiple adjustment ports 15 are all set as inclined surfaces on the same side. The multiple movable wheels 13 work in cooperation with the inclined surfaces of the multiple adjustment ports 15, so that when the adjustment rod 10 moves, the movable wheel 13 will move from low to high on the inclined surface, thereby moving the positioning rod 8 to extend for positioning.

[0033] Multiple positioning rods 8 have a limiting plate 12 fixed at one end within the mounting hole 9. Springs 11 are fitted onto the outer sides of each positioning rod 8, with both ends of the springs 11 fixedly connected to one side of the limiting plate 12 and the top of the mounting hole 9, respectively. To facilitate the retraction of the positioning rods 8, the springs 11 are compressed when the positioning rods 8 extend. After the adjusting rod 10 returns to its original position, the limiting plate 12 rebounds under the action of the springs 11, thereby causing the positioning rods 8 to retract quickly.

[0034] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A pre-welded weld positioning structure for small-diameter, thin-walled, straight-seam submerged arc welded steel pipe, comprising a workbench (1), characterized in that: The upper part of one end of the workbench (1) is fixed with a support base (2), and an inner support rod (3) is fixedly inserted through the support base (2). Multiple positioning rods (8) are telescopically installed on the upper part of the inner support rod (3). The multiple positioning rods (8) are arranged in a linear array on the inner support rod (3). Clamping rods (6) are movably installed on both sides of the inner support rod (3) on the workbench (1). The two clamping rods (6) on one side of the inner support rod (3) are both set to a shape corresponding to the inner support rod (3).

2. The pre-welded weld positioning structure for a small-diameter, thin-walled, straight-seam submerged arc welded steel pipe according to claim 1, characterized in that: The upper part of the workbench (1) is fixedly installed with side plates (4) on both sides, and the two clamping rods (6) are telescopically connected to the two side plates (4) on opposite sides respectively.

3. The pre-welded weld positioning structure for a small-diameter, thin-walled, straight-seam submerged arc welded steel pipe according to claim 2, characterized in that: Two No. 1 cylinders (5) are fixedly installed on both sides of the upper part of the workbench (1). One end of the piston rod of the No. 1 cylinder (5) slides through the side plate (4) and is fixedly connected to the clamping rod (6).

4. The pre-welded weld positioning structure for a small-diameter, thin-walled, straight-seam submerged arc welded steel pipe according to claim 3, characterized in that: The upper surface of the inner support rod (3) is provided with multiple telescopic holes (7) in a linear manner, and the multiple positioning rods (8) are respectively telescopically installed in the multiple telescopic holes (7).

5. The pre-welded weld positioning structure for a small-diameter, thin-walled, straight-seam submerged arc welded steel pipe according to claim 4, characterized in that: The inner support rod (3) has a through-hole (9) at one end. The through-hole (9) is rectangular. Multiple telescopic holes (7) are through the through-hole (9). An adjusting rod (10) is slidably installed in the through-hole (9).

6. The pre-welded weld positioning structure for a small-diameter, thin-walled, straight-seam submerged arc welded steel pipe according to claim 5, characterized in that: The adjusting rod (10) is located on one side of the positioning rod (8). An adjusting port (15) is provided at each adjusting rod (10). A second cylinder (14) for pushing the adjusting rod (10) to slide is fixedly installed at one end of the mounting hole (9).

7. The pre-welded weld positioning structure for a small-diameter, thin-walled, straight-seam submerged arc welded steel pipe according to claim 6, characterized in that: Each of the positioning rods (8) has a movable wheel (13) installed at one end of the mounting hole (9), and the same side of the multiple adjustment ports (15) is set as an inclined surface. The multiple movable wheels (13) cooperate with the inclined surfaces of the multiple adjustment ports (15) respectively.

8. The pre-welded weld positioning structure for a small-diameter, thin-walled, straight-seam submerged arc welded steel pipe according to claim 7, characterized in that: One end of each of the positioning rods (8) located in the mounting hole (9) is fixed with a limiting plate (12), and springs (11) are sleeved on the outside of each of the positioning rods (8). The two ends of the springs (11) are fixedly connected to one side of the limiting plate (12) and the top of the mounting hole (9), respectively.

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