Petroleum pipeline end welding tool

Abstract

The utility model provides a petroleum pipeline end welding tool which comprises a main rod, a fixing ring is fixedly connected to the side wall of the main rod, a plurality of supporting arms are rotationally connected to the two sides of the fixing ring correspondingly, two movable check blocks are arranged on the main rod in a sliding fit mode, and the two movable check blocks are symmetrically arranged relative to the fixing ring; a two-way screw is arranged in the main rod and is in threaded connection with two movable check blocks, the two-way screw rotates, the two movable check blocks are away from or close to each other, a threaded section is arranged on the side wall of the main rod, and a sliding plate is arranged at the threaded section in a sliding fit mode. A plurality of radial sliding blocks are arranged on the sliding plate in the radial direction of the main rod in a sliding mode, spiral grooves are formed in the side walls of the radial sliding blocks, a rotating ring is rotationally connected to the side wall of the sliding plate, spiral protruding lines are arranged on one side of the rotating ring, and the spiral grooves are matched with the spiral protruding lines. The positioning precision of the flange is improved, and welding is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of welding tooling, in particular to a welding tooling for an end portion of a petroleum pipeline. Background Art

[0002] There are two ways to connect oil pipelines: welding and flange connection. Welding requires corresponding welding equipment to be provided at the construction site. With the accuracy of construction, it needs to be constantly transferred, so compared with flange connection, its construction period is longer.

[0003] In the existing flange pipeline production, the flange is directly welded to the pipeline in the factory. Positioning processing is required during flange welding. In the existing positioning tooling, the pipeline and the flange are fixed separately, and then adjusted through the pipeline support structure or the flange support structure to achieve alignment between the pipeline and the flange. At the same time, during the welding process, the tooling is hindered, which is not conducive to continuous welding or inconvenient welding. Summary of the invention

[0004] In order to solve the above problems, the present invention discloses a welding tool for the end of an oil pipeline, comprising a main rod, a fixing ring is fixedly connected to the side wall of the main rod, a plurality of support arms are rotatably connected to both sides of the fixing ring, two movable blocks are slidably matched on the main rod, and the two movable blocks are symmetrically arranged about the fixing ring, a bidirectional screw is arranged inside the main rod, and the bidirectional screw is respectively threadedly connected to the two movable blocks, and the two-way screw rotates, and the two movable blocks move away from or close to each other. Rotating the bidirectional screw makes the two movable blocks approach each other and abut against the support arm, so that the support arm rotates, and the end of the support arm abuts against the inner wall of the pipeline, so that the relative position of the tool and the pipeline is maintained.

[0005] The side wall of the main rod is provided with a threaded section, and a sliding plate is provided at the threaded section for sliding cooperation. The sliding plate is provided with a plurality of radial sliders for radial sliding along the main rod, and the side wall of the radial slider is provided with a spiral groove. The side wall of the sliding plate is rotatably connected with a rotating ring, and one side of the rotating ring is provided with a spiral convex pattern, and the spiral groove and the spiral convex pattern cooperate. The flange is placed at the end of the radial slider starting from the inner wall, and the rotating ring is rotated so that the radial slider slides outward and tightly presses against the flange. At the same time, the structure of the radial slider and the rotating ring is similar to a three-jaw chuck, so the flange is in this supporting and fixing structure, and its axis is in line with the axis of the main rod. At the same time, under the support of the support arm, the main rod realizes the co-linearity of the axis of the main rod and the axis of the pipeline, that is, the co-axiality of the flange and the pipeline can be realized, and the rapid axis positioning operation of the flange can be realized. At the same time, the sliding plate adopts a sliding setting, which can control the spacing between the flange and the pipeline to meet the welding requirements.

[0006] Preferably, the movable block includes an axial slider that is slidably fitted inside the main rod, and the axial slider is threadedly connected to the bidirectional screw, the side wall of the axial slider is fixedly connected with a connecting block, and the connecting block is located in the axial opening preset in the side wall of the main rod, and the connecting block is fixedly connected with a conical ring, and the conical surface of the conical ring is against the support arm. That is, the movable block is composed of at least three parts, and the support arm is supported by the movable block at different positions, so that the tooling can be fixed in pipes of different diameters. Further, without affecting the activity of the movable block, a tension spring can be set on the support arm, and the other end of the tension spring is fixedly connected to the side wall of the main rod, that is, when the movable block and the support arm are not in contact, the tension spring can pull the support arm to make it close to the main rod, which is conducive to sending the tooling into the pipeline.

[0007] Preferably, one end of the bidirectional screw extends from the end of the main rod, and the end of the bidirectional screw is fixedly connected to a first handle. The bidirectional screw is rotated by rotating the first handle. It should be noted that the outer diameter of the first handle should not exceed the outer diameter of the sliding plate.

[0008] Preferably, a retaining ring is fixedly connected to the middle side wall of the main rod, a spring is arranged on one side of the retaining ring, the other end of the spring abuts against the side wall of the sliding plate, a threaded sleeve is arranged on the threaded section in threaded cooperation, one end of the threaded sleeve abuts against the sliding plate, and the other end of the side wall is fixedly connected to the second turning handle. That is, under the action of the spring, the sliding plate is away from the pipeline, and at this time, the second turning handle is rotated, and the sliding plate can be pushed close to the pipeline through the axial movement of the threaded sleeve. The purpose of adopting this setting is that the distance between the flange and the pipeline is easier to control and maintain, which is conducive to welding. Furthermore, a telescopic sleeve or a metal bellows is arranged on the outside of the spring to prevent welding slag from falling and causing damage to the spring or jamming the spring.

[0009] Preferably, the side wall of the main rod is provided with a slide groove, the inner side of the sliding plate is provided with a convex block, and the convex block and the slide groove are slidably matched. Since the position of the sliding plate is provided with a threaded section, if the inner side wall of the sliding plate and the threaded section are in direct contact, the sliding plate will not slide smoothly and the thread will be damaged. Therefore, a matching structure of the convex block and the slide groove is provided, which can keep the thread sleeve matched while achieving smooth sliding of the sliding plate.

[0010] Preferably, the rotating ring comprises a connecting sleeve, the spiral convex pattern is located on one side of the connecting sleeve, and a third rotating handle is fixedly connected to the other side of the connecting sleeve. The spiral convex pattern is rotated through the third rotating handle to drive the radial movement of the radial slider.

[0011] Preferably, the end of the radial slider is threadedly connected to an extension block, the end of the extension block is threadedly connected to a top block, and the end of the top block is a stepped surface. Due to the size of the sliding plate and the inner diameter of the pipe, the moving distance of the radial slider is relatively short during the design process, so by adding an extension block, more pipe welding needs can be met, and the end of the top block is a stepped surface, which supports and positions the inner diameter wall and end of the flange and improves the welding accuracy.

[0012] Preferably, the end of the support arm is fixedly connected with a support foot, which can be made of rubber to prevent the support wall and the pipeline from slipping.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The support arm and other structures are provided to fix the tooling directly inside the pipeline. After the flange is supported and fixed by the sliding plate, the coaxial positioning of the flange and the pipeline can be achieved. The threaded sleeve, spring, etc. can be used to adjust the distance between the control pipeline and the flange, which is conducive to welding.

[0015] 2. This tool is directly fixed to the inner wall of the pipe. The welding area between the pipe and the flange is not blocked, which is conducive to continuous welding. At the same time, rotating the pipe can realize the follow-up movement of the flange, which can meet the advantages of fixed-point setting of the welding gun and achieve continuous welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0017] Figure 2 It is an explosion schematic diagram of the present invention;

[0018] Figure 3 It is a three-dimensional schematic diagram of the movable stopper of the present invention;

[0019] Figure 4 It is a cross-sectional schematic diagram of the rotating ring of the present invention;

[0020] Figure 5 It is a schematic diagram of the radial sliding block of the present invention.

[0021] List of reference numerals:

[0022] 1. Main rod; 2. Movable stopper; 3. Fixed ring; 4. Support arm; 5. Spring; 6. Sliding plate; 7. First rotating handle; 8. Bump; 9. Extension block; 10. Radial slider; 11. Top block; 12. Rotating ring; 13. Threaded sleeve; 14. Second rotating handle; 15. Sliding groove; 16. Threaded section; 17. Stop ring; 18. Support foot; 19. Bidirectional screw;

[0023] 21. conical ring; 22. axial slider; 23. connecting block; 101. spiral groove; 121. third handle; 122. connecting sleeve; 123. spiral convex pattern. DETAILED DESCRIPTION

[0024] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0025] like Figures 1 to 5 As shown, a welding tool for the end of an oil pipeline includes a main rod 1, which is a rigid pipe fitting. A fixing ring 3 is fixedly connected to the side wall of the main rod 1. Both sides of the fixing ring 3 are rotatably connected to a plurality of support arms 4. When the tool is in use, the part containing the support arms 4 is extended into the interior of the pipeline. Two movable blocks 2 are slidingly matched on the main rod 1, and the two movable blocks 2 are symmetrically arranged about the fixing ring 3. A bidirectional screw 19 is arranged inside the main rod 1, and the bidirectional screw 19 is threadedly connected to the two movable blocks 2 respectively. When the bidirectional screw 19 rotates, the two movable blocks 2 move away from or approach each other, that is, the bidirectional screw 19 is rotated to make the movable blocks 2 approach each other and clamp the support arms 4, so that the support arms 4 rotate, and the ends of the support arms 4 are tightly against the inner wall of the pipeline. Since a plurality of support arms 4 are provided, the coaxial positioning of the main rod 1 and the pipeline is guaranteed while the tool is fixed relative to the pipeline.

[0026] A threaded section 16 is provided on the side wall of the main rod 1, and a sliding plate 6 is slidably provided at the threaded section 16. The sliding plate 6 is located in an annular member, which is coaxially arranged with the main rod 1. The sliding plate 6 is provided with a plurality of radial sliders 10 along the radial sliding of the main rod 1. When preparing for welding, the flange is fixed to the end of the radial slider 10. Specifically, a plurality of radial sliders 10 are pressed against the inner diameter wall of the flange. A spiral groove 101 is provided on the side wall of the radial slider 10. A rotating ring 12 is rotatably connected to the side wall of the sliding plate 6. A spiral convex pattern 123 is provided on one side of the rotating ring 12, and the spiral groove 101 and the spiral convex pattern 123 cooperate with each other. This cooperation method is not much different from a three-turn chuck. By rotating the rotating ring 12, the support, fixation and positioning of the flange can be achieved, thereby ensuring the coaxiality of the flange and the pipeline.

[0027] The movable stopper 2 includes an axial slider 22 that is slidably fitted inside the main rod 1, and the axial slider 22 is threadedly connected to the bidirectional screw 19, a connecting block 23 is fixedly connected to the side wall of the axial slider 22, and the connecting block 23 is located in an axial opening preset on the side wall of the main rod 1, a conical ring 21 is fixedly connected to the connecting block 23, and the conical surface of the conical ring 21 abuts against the support arm 4. The movable stopper 2 is composed of multiple parts.

[0028] One end of the bidirectional screw 19 extends from the end of the main rod 1, and the end of the bidirectional screw 19 is fixedly connected to the first handle 7. The rotation of the bidirectional screw 19 is achieved by rotating the first handle 7.

[0029] The middle side wall of the main rod 1 is fixedly connected with a retaining ring 17, and a spring 5 is provided on one side of the retaining ring 17. The other end of the spring 5 abuts against the side wall of the sliding plate 6, that is, under the push of the spring 5, the sliding plate 6 is moved away from the retaining ring 17, that is, after the tooling is fixed on the pipeline, the sliding plate 6 is away from the pipeline. The threaded sleeve 13 is threadedly matched on the threaded section 16, and one end of the threaded sleeve 13 abuts against the sliding plate 6, and the second turning handle 14 is fixedly connected to the side wall of the other end. When the second turning handle 14 is turned, the threaded sleeve 13 rotates and also moves axially, and pushes the sliding plate 6 to move in the direction of the pipeline. At this time, the flange fixed on the sliding plate 6 also moves toward the pipeline. With this structure, the distance between the pipeline and the flange can be stably controlled.

[0030] The side wall of the main rod 1 is provided with a slide groove 15 , and the inner side of the sliding plate 6 is provided with a protrusion 8 , and the protrusion 8 and the slide groove 15 are slidably matched, so that the sliding plate 6 is slidably matched on the main rod 1 .

[0031] The rotating ring 12 includes a connecting sleeve 122, a spiral convex pattern 123 is located on one side of the connecting sleeve 122, and a third rotating handle 121 is fixedly connected to the other side of the connecting sleeve 122. The rotating ring 12 rotates with the third rotating handle 121, thereby controlling the radial sliding of the radial slider 10.

[0032] The end of the radial slider 10 is threadedly connected with an extension block 9, and the end of the extension block 9 is threadedly connected with a top block 11, and the end of the top block 11 is a stepped surface. Since the sliding distance of the radial slider 10 is given priority during design, an extension block 9 is added. According to the inner diameter of the welded flange, multiple extension blocks 9 can be provided, and the stepped surface structure of the top block 11 can simultaneously resist the inner diameter surface and the end surface of the flange, thereby improving the positioning accuracy.

[0033] The end of the support arm 4 is fixedly connected with a support foot 18. The support foot 18 is made of a rubber pad to prevent slipping.

[0034] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. A welding tool for the end of a petroleum pipeline, characterized in that: The invention comprises a main rod (1), a side wall of the main rod (1) is fixedly connected to a fixing ring (3), both sides of the fixing ring (3) are rotatably connected to a plurality of support arms (4), the main rod (1) is provided with two movable blocks (2) in a sliding manner, and the two movable blocks (2) are symmetrically arranged with respect to the fixing ring (3), a bidirectional screw (19) is arranged inside the main rod (1), and the bidirectional screw (19) is respectively threadedly connected to the two movable blocks (2), and when the bidirectional screw (19) rotates, the two movable blocks (2) move away from or closer to each other; A threaded section (16) is provided on the side wall of the main rod (1), a sliding plate (6) is slidably provided at the threaded section (16), a plurality of radial sliders (10) are provided on the sliding plate (6) for radial sliding movement along the main rod (1), a spiral groove (101) is provided on the side wall of the radial slider (10), a rotating ring (12) is rotatably connected to the side wall of the sliding plate (6), a spiral convex pattern (123) is provided on one side of the rotating ring (12), and the spiral groove (101) and the spiral convex pattern (123) are matched.

2. The oil pipeline end welding tool according to claim 1 is characterized in that: The movable stopper (2) comprises an axial slider (22) slidably fitted inside the main rod (1), and the axial slider (22) is threadedly connected to the bidirectional screw (19), a connecting block (23) is fixedly connected to the side wall of the axial slider (22), and the connecting block (23) is located in an axial opening preset in the side wall of the main rod (1), a conical ring (21) is fixedly connected to the connecting block (23), and the conical surface of the conical ring (21) abuts against the support arm (4).

3. The oil pipeline end welding tool according to claim 1 is characterized in that: One end of the bidirectional screw rod (19) extends from the end of the main rod (1), and the end of the bidirectional screw rod (19) is fixedly connected to the first rotating handle (7).

4. The oil pipeline end welding tool according to claim 1, characterized in that: A retaining ring (17) is fixedly connected to the middle side wall of the main rod (1), a spring (5) is provided on one side of the retaining ring (17), the other end of the spring (5) abuts against the side wall of the sliding plate (6), a threaded sleeve (13) is provided on the threaded section (16) in threaded cooperation, one end of the threaded sleeve (13) abuts against the sliding plate (6), and the other end of the side wall is fixedly connected to a second turning handle (14).

5. The oil pipeline end welding tool according to claim 1 is characterized in that: A sliding groove (15) is provided on the side wall of the main rod (1), and a protrusion (8) is provided on the inner side of the sliding plate (6), wherein the protrusion (8) and the sliding groove (15) are slidably matched.

6. The oil pipeline end welding tool according to claim 1, characterized in that: The rotating ring (12) comprises a connecting sleeve (122), the spiral convex pattern (123) is located on one side of the connecting sleeve (122), and the other side of the connecting sleeve (122) is fixedly connected to a third rotating handle (121).

7. The oil pipeline end welding tool according to claim 1, characterized in that: The end of the radial sliding block (10) is threadedly connected to an extension block (9), the end of the extension block (9) is threadedly connected to a top block (11), and the end of the top block (11) is a stepped surface.

8. The oil pipeline end welding tool according to claim 1, characterized in that: The end of the support arm (4) is fixedly connected to a support foot (18).

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