A portable welding aid for natural gas pipeline repair

Abstract

The utility model relates to natural gas pipeline maintenance technical field discloses a portable welding auxiliary device for natural gas pipeline maintenance, including the support frame of being supported in the below of the pipeline to be welded and the docking mechanism for making the pipe mouth alignment of two pipelines to be welded, the docking mechanism includes two hinges that can be tightly in the outside of the pipeline to be welded, a plurality of connecting columns connecting two hinges, and the connecting column is composed of two sections of unit module that can be spliced and disassembled, so as to carry out welding to the splicing seam of two pipelines to be welded. The whole device is compact in structure, convenient transportation and on -the -spot use. Adopt the unit module design of detachable splicing, especially suitable for the welding operation of natural gas pipeline maintenance on -the -spot, and the operator can install the equipment on the pipeline to carry out welding quickly, greatly improves the convenience of operation.

Description

Technical Field

[0001] This invention relates to the field of natural gas pipeline maintenance technology, and in particular to a portable welding auxiliary device for natural gas pipeline repair. Background Technology

[0002] During daily operation, natural gas pipelines may experience damage or leaks due to aging, external injury, or improper construction. Therefore, pipeline maintenance is crucial. Especially for large-diameter, complex-structured natural gas pipelines, maintenance often requires welding techniques. Traditional welding operations involve manual connection of the pipeline and ensuring precise alignment of the weld points, a tedious process that demands highly skilled personnel.

[0003] Currently, there are some welding auxiliary equipment available on the market for natural gas pipeline repair. These devices typically have complex structures and require significant manual intervention during operation, resulting in low work efficiency. More importantly, existing equipment often struggles to achieve precise pipe connections, easily leading to poor welds. To address this issue, welding auxiliary equipment needs to be convenient, precise, and efficient, especially in terms of portability and operability.

[0004] Although some welding aids can improve this problem to some extent, they still have the following shortcomings in structural design and operation: the equipment is heavy, making it inconvenient for quick on-site repairs; after connecting pipes, the existing equipment will obstruct the pipe joints, which is not conducive to the rapid welding of the joints and causes great inconvenience in use.

[0005] Therefore, there is an urgent need for a new type of welding auxiliary device that can ensure efficient and precise welding while also being more portable and easy to operate, in order to meet the maintenance needs of natural gas pipelines in different environments. Summary of the Invention

[0006] To address the technical problems mentioned in the background section, the present invention provides a portable welding auxiliary device for natural gas pipeline maintenance.

[0007] The present invention is achieved by the following technical solution: a portable welding auxiliary device for natural gas pipeline repair, comprising a support frame supported under the pipeline to be welded and a docking mechanism for aligning the ends of two pipelines to be welded.

[0008] The docking mechanism includes two hinges that can be tightened on the outside of the pipes to be welded, and several connecting columns connecting the two hinges. Each connecting column consists of two detachable unit modules to facilitate welding the joint between the two pipes.

[0009] Preferably, the unit module includes a circular sleeve and a sliding column, the diameter of the sliding column is smaller than the diameter of the sleeve, one end of the sleeve is connected by a pin and a hinge, the other end of the sleeve is provided with a cavity for the sliding column to slide axially, and the end of the sliding column in one unit module has a butt joint, and the end of the sliding column in the other unit module has a mating groove that mates with the butt joint.

[0010] Preferably, the inner wall of the mating groove and the mating joint are magnetically attracted to fix the position of the two sliding columns in the length direction.

[0011] Preferably, an elastic element is provided inside the cavity to abut against the inner end of the sliding column, and a countersunk hole is provided on the side wall of the sleeve, at which a locking element capable of abutting against the sliding column is installed.

[0012] Preferably, the locking element is a hexagonal bolt and the elastic element is a columnar spring.

[0013] Preferably, the hinge is formed by rotating several unit plates end to end, and the end of the sleeve is movably connected to the unit plate. The connecting post at one end is a locking post-a. Both unit modules in the locking post-a are equipped with a tightening mechanism. The connecting post at the other end is movably fitted with a tail plate, which is used to engage with the locking post-a.

[0014] Preferably, the tightening mechanism includes a screw, a pressure head, and an end cap, wherein the screw and the sleeve in the unit module are screwed together, the pressure head and the end cap are fixed at both ends of the screw, and the pressure head is used to abut against the pipe to be welded.

[0015] Preferably, the shape of the joint and the mating groove is a regular hexagon.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. Simple structure and easy to carry: The device has a compact overall structure, making it convenient for transportation and on-site use. It adopts a detachable and modular design, making it particularly suitable for welding operations at natural gas pipeline maintenance sites. Operators can quickly install the equipment onto the pipeline for welding, greatly improving the convenience of the operation.

[0018] 2. Improved Welding Precision: The docking mechanism is designed to precisely align the ends of two pipes to be welded, ensuring the accuracy of the joint during welding. This docking method avoids welding defects caused by inaccurate pipe alignment, thus improving welding quality.

[0019] 3. Easy to adjust and disassemble: The unit module adopts a sliding column and sleeve structure design, which can be flexibly disassembled one by one according to the welding operation. It will not obstruct the welding head, nor will the tightening force decrease due to the disassembly of a single connecting column. It can always maintain the stability of the pipeline connection, making the operation more convenient. In addition, through the cooperation of the magnetic docking groove and the butt joint, it can ensure the stable fixation of the sliding column in the length direction, which facilitates quick on-site operation.

[0020] 4. Highly Efficient Operation: Compared to traditional equipment, this invention can quickly complete pipe connection and fixing, reducing the cumbersome adjustment and operation steps required in traditional equipment. Through modular design, it can be adjusted according to different pipe specifications, improving maintenance efficiency. Attached Figure Description

[0021] Figure 1 This is a perspective view of the portable welding auxiliary device proposed in this invention in its usage state.

[0022] Figure 2 This is a perspective view of the docking mechanism proposed in this invention in its unfolded state;

[0023] Figure 3 This is a schematic diagram of the connecting column structure proposed in Embodiment 1 of the present invention;

[0024] Figure 4 This is a schematic diagram of the connecting column structure proposed in Embodiment 2 of the present invention;

[0025] Figure 5 This is a schematic diagram of the docking groove of the present invention.

[0026] Explanation of key symbols:

[0027] In the diagram: 1. Pipe to be welded; 2. Butt welding mechanism; 3. Support frame; 4. Tightening mechanism;

[0028] Connecting post 200, locking post 200-a, tail plate 210, hinge 220;

[0029] Sleeve 201, cavity 202, sliding column 203, connector 204, mating groove 205, elastic element 206, locking element 207;

[0030] Screw 400, pressure head 410, end cap 420. Detailed Implementation

[0031] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0032] Example 1

[0033] Reference Figures 1-5 This embodiment proposes a portable welding auxiliary device for natural gas pipeline maintenance, including a support frame 3 supported under the pipeline 1 to be welded and a docking mechanism 2 for aligning the pipe ends of two pipelines 1 to be welded; the support frame 3 can be formed by welding I-beams, and the top of the support frame 3 has an arc-shaped positioning groove to facilitate supporting the round natural gas pipeline.

[0034] The docking mechanism 2 includes two hinges 220 that can be tightened around the outside of the pipes 1 to be welded, and several connecting posts 200 connecting the two hinges 220. Each connecting post 200 is composed of two detachable unit modules to facilitate welding of the joint between the two pipes 1 to be welded. The hinges 220 can be made of high-strength, lightweight materials, and their lightweight design makes them easy to carry.

[0035] In a preferred embodiment of the present invention, the unit module includes a circular sleeve 201 and a sliding column 203. The diameter of the sliding column 203 is smaller than the diameter of the sleeve 201. One end of the sleeve 201 is connected to a hinge 220 via a pin. The other end of the sleeve 201 is provided with a cavity 202 for the sliding column 203 to slide axially. The sliding column 203 in one unit module has a connector 204 at its end, and the sliding column 203 in another unit module has a mating groove 205 at its end that mates with the connector 204.

[0036] In this design, the inner wall of the mating groove 205 and the mating joint 204 are magnetically attracted to fix the position of the two sliding columns 203 in the length direction.

[0037] It should be noted that, as a preferred embodiment of the present invention, the hinge 220 is formed by connecting several unit plates through a pin shaft, and the end of the sleeve 201 is movably connected to the unit plate. The connecting post 200 at one end is a locking post 200-a. Both unit modules in the locking post 200-a are equipped with a tightening mechanism 4. The connecting post 200 at the other end is movably fitted with a tail plate 210, which is used to engage with the locking post 200-a.

[0038] In this scheme, the tightening mechanism 4 includes a screw 400, a pressure head 410 and an end cap 420. The screw 400 is screwed to the sleeve in the unit module. The pressure head 410 and the end cap 420 are respectively fixed at both ends of the screw 400. The pressure head 410 is used to abut against the pipe 1 to be welded.

[0039] Preferably, the shape of the connector 204 and the mating groove 205 is a regular hexagon to facilitate quick docking.

[0040] Example 2

[0041] In this embodiment, in order to facilitate the disassembly and assembly of the connecting column, an elastic element 206 is provided in the cavity 202 to abut against the inner end of the sliding column 203, and a countersunk hole is provided on the side wall of the sleeve 201, and a locking element 207 that can abut against the sliding column 203 is installed at the countersunk hole.

[0042] In this embodiment, the locking element 207 is a hexagonal bolt, and the elastic element 206 is a columnar spring.

[0043] When this device is in operation, the support frame is first placed under the pipe to be welded, and then the docking mechanism 2 is installed at the joint. Initially, the two unit modules in each connecting column 200 are in the connected state, such as... Figure 1 As shown, the tail plate 210 and the locking pin 200-a are engaged, and then the screws 400 in the two tightening mechanisms 4 are rotated, thereby reducing the distance between the hinge and the pipe, so that each connecting pin 200 is tightly fitted against the outer wall of the pipe. At this time, the pipes on both sides of the splice are aligned, which facilitates subsequent welding. However, due to the obstruction of the connecting pin 200, the welding joint of the splice near it is not easy to operate. Therefore, during the welding process, the connecting pins 200 at the splice need to be disassembled one by one, that is, the sliding pin 203 is pushed into the corresponding cavity. At this time, the splice can be welded without obstruction. Since the diameter of the sliding pin 203 is smaller than the diameter of the sleeve 201, the movement of the sliding pin 203 will not be obstructed, because it is the outer wall of the sleeve 201 that is actually in contact with the pipe.

[0044] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A portable welding auxiliary device for natural gas pipeline repair, characterized in that, Includes a support frame (3) supporting the pipe (1) to be welded and a docking mechanism (2) for aligning the ends of the two pipes (1) to be welded. The docking mechanism (2) includes two hinges (220) that can be tightened on the outside of the pipe (1) to be welded, and several connecting columns (200) connecting the two hinges (220). The connecting column (200) is composed of two detachable unit modules to facilitate welding of the joint of the two pipes (1) to be welded.

2. The portable welding auxiliary device for natural gas pipeline maintenance as described in claim 1, characterized in that, The unit module includes a circular sleeve (201) and a sliding column (203). The diameter of the sliding column (203) is smaller than the diameter of the sleeve (201). One end of the sleeve (201) is connected by a pin and a hinge (220). The other end of the sleeve (201) is provided with a cavity (202) for the sliding column (203) to slide axially. The sliding column (203) in one unit module has a butt joint (204) at its end, and the sliding column (203) in another unit module has a mating groove (205) that mates with the butt joint (204) at its end.

3. A portable welding auxiliary device for natural gas pipeline maintenance as described in claim 2, characterized in that, The inner wall of the docking groove (205) and the docking joint (204) are magnetically attracted to fix the position of the two sliding columns (203) in the length direction.

4. A portable welding auxiliary device for natural gas pipeline maintenance as described in claim 2, characterized in that, The cavity (202) is provided with an elastic element (206) that abuts against the inner end of the sliding column (203). The sleeve (201) has a countersunk hole on its side wall, and a locking element (207) that can abut against the sliding column (203) is installed at the countersunk hole.

5. A portable welding auxiliary device for natural gas pipeline maintenance as described in claim 4, characterized in that, The locking element (207) is a hexagonal bolt, and the elastic element (206) is a columnar spring.

6. A portable welding auxiliary device for natural gas pipeline maintenance as described in claim 1, characterized in that, The hinge (220) is formed by rotating several unit plates from end to end, and the end of the sleeve (201) is movably connected to the unit plate. The connecting post (200) at one end is a locking post (200-a). Both unit modules in the locking post (200-a) are equipped with a tightening mechanism (4). The connecting post (200) at the other end is movably fitted with a tail plate (210), which is used to engage with the locking post (200-a).

7. A portable welding auxiliary device for natural gas pipeline maintenance as described in claim 6, characterized in that, The tightening mechanism (4) includes a screw (400), a pressure head (410), and an end cap (420). The screw (400) is helically connected to the sleeve in the unit module. The pressure head (410) and the end cap (420) are respectively fixed at both ends of the screw (400). The pressure head (410) is used to abut against the pipe (1) to be welded.

8. A portable welding auxiliary device for natural gas pipeline maintenance as described in claim 3, characterized in that, The shape of the connector (204) and the mating groove (205) is a regular hexagon.

Images