CN212429834U

CN212429834U - Auxiliary device for pressure pipeline pressure welding

Info

Publication number: CN212429834U
Application number: CN202020471842.6U
Authority: CN
Inventors: 张玉华; 张文军; 甄建; 黄爽; 冯卫刚; 麦合苏提·麦麦提图尔荪; 王艳梅; 马红升; 李江玲; 汪佩莹
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2021-01-29
Anticipated expiration: 2030-04-02

Abstract

The utility model provides a be used for pipeline under pressure welded auxiliary device, include: one end of the outer cylinder is an air inlet, one end of the outer cylinder close to the air inlet is spot-welded at the leakage position of the pressure pipeline, and an air outlet is formed in the wall of the outer cylinder; the inner core, the inner core stretches into to the urceolus in from the one end that the air inlet was kept away from to the urceolus, and the axial displacement of urceolus can be followed to the inner core, and when the inner core removed to the air inlet, the inner core can the shutoff air inlet, and when the inner core removed to keeping away from the air inlet, air inlet and gas vent can communicate. The utility model provides a pressure pipeline leak and be difficult to welded problem among the prior art.

Description

Auxiliary device for pressure pipeline pressure welding

Technical Field

The utility model relates to a pipeline under pressure welding field particularly, relates to a be used for pipeline under pressure welded auxiliary device.

Background

During production and operation of the pressure pipeline, the pipeline can leak after long-term use due to welding quality or corrosion. Conventional pipeline welding repair leakage carries out the repair welding after cutting off the pressure source pressure release, but to some to producing the great pipeline of life influence, like heat supply pipeline, cutting off pressure sources such as water supply pipe can lead to the fact very big influence to the user, can also cause huge economic loss sometimes, consequently often takes the area to press the operation to these pipelines to reduce the influence to the user. The problems of long pressure relief time and difficult pressure relief of damaged pipelines with large pipeline diameter and long distance between control valves at two ends of the pipelines exist. Laying a pipeline with large height difference, and after the pipeline is damaged at a low position, the excess pressure of the pipeline cannot be exhausted for a long time, when the pipeline is subjected to leakage repair welding, due to the pressure action, the molten metal of electric welding is blown off by a leakage medium before cooling, so that the welding cannot be carried out, the compression welding leakage repair is mostly adopted aiming at the field electric welding leakage repair under the condition, in the welding process, a metal tool hammer is utilized to beat a leakage point under the condition of high temperature of the welding position, the metal is knocked to deform by utilizing impact force, the leakage point is blocked, the pipeline is rapidly welded after the leakage of the pipeline is stopped, the operation method has a certain effect on the pipeline with small leakage amount, and the compression welding leakage repair method loses the effect when the leakage amount of the pipeline is large or the leakage position cannot be. When the electric welding leakage repairing of the pipeline cannot be carried out, the clamp is mostly adopted to carry out leakage plugging under pressure, the leakage plugging of the clamp depends on the extrusion of sealing materials to seal leakage points, and the leakage is easy to occur in the later period.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a be used for pipeline under pressure welded auxiliary device to solve among the prior art pipeline under pressure and leak and be difficult to welded problem.

In order to achieve the above object, according to an aspect of the present invention, there is provided an auxiliary device for pressure pipe welding under pressure, comprising: one end of the outer cylinder is an air inlet, one end of the outer cylinder close to the air inlet is spot-welded at the leakage position of the pressure pipeline, and an air outlet is formed in the wall of the outer cylinder; the inner core, the inner core stretches into to the urceolus in from the one end that the air inlet was kept away from to the urceolus, and the axial displacement of urceolus can be followed to the inner core, and when the inner core removed to the air inlet, the inner core can the shutoff air inlet, and when the inner core removed to keeping away from the air inlet, air inlet and gas vent can communicate.

Further, one end, facing the air outlet, of the inner core is provided with a first conical structure, and when the inner core moves towards the air inlet, the first conical structure can block the air inlet.

Further, the inner wall of the outer barrel is provided with a second conical structure matched with the first conical structure between the air inlet and the air outlet, and the first conical structure is attached to the second conical structure to seal the air inlet.

Further, the urceolus is including the first footpath section and the first big footpath section of connecting in order, and the air inlet sets up in the tip of first footpath section, and the lateral wall in first big footpath section is seted up to the gas vent.

Further, a transition section is arranged at the connecting position of the first small-diameter section and the first large-diameter section.

Further, the inner core includes second path section and the big footpath section of second that connects in order, and the second path section is towards the air inlet of urceolus, and the inner wall of first big footpath section is seted up there is the internal thread, and the outer wall of the big footpath section of second is seted up with internal thread fit's external screw thread.

Further, when the inner core blocks the air inlet, the second small-diameter section is located at the position of the air outlet.

Further, when the inner core blocks the air inlet, at least one part of the second large-diameter section extends out of the outer cylinder.

Further, the protruding end of the second large-diameter section is fixedly connected with a screwing section.

Further, the cross section of the screwing section is hexagonal.

Use the technical scheme of the utility model, when welding the leakage position of pipeline under pressure, remove the inner core to the direction of keeping away from the air inlet, make the urceolus get air inlet and gas vent and can communicate. And spot-welding one end of the outer cylinder close to the air inlet to the leakage position of the pressure pipeline. Because the air inlet and the gas vent of urceolus can communicate, the gas of following the pipeline under pressure internal leakage can get into in the air inlet, then discharge from the gas vent, gas can show from the peripheral leakage quantity of urceolus and reduce, pressure also can reduce, the welding of mending-leakage is all carried out with the peripheral leakage position of urceolus this moment, after the welding is accomplished, remove the inner core to the direction that is close to the air inlet, make inner core shutoff air inlet, can accomplish shutoff work, after long-time the use, in order to prevent to appear leaking between inner core and the urceolus, can all weld the shutoff with the inner core, the urceolus, the gas vent on the urceolus, can reach permanent shutoff purpose.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic half-section of an auxiliary device for pressure pipe welding under pressure according to an embodiment of the present invention;

wherein the figures include the following reference numerals:

10. an outer cylinder; 11. an air inlet; 12. an exhaust port; 13. a first small diameter section; 14. a first major diameter section; 15. a second tapered structure; 16. a transition section; 20. an inner core; 21. a second minor diameter section; 22. a second major diameter section; 23. a first tapered structure; 24. And (5) screwing the section.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that the leakage of the pressure pipeline in the prior art is difficult to weld, the utility model provides a be used for pressure pipeline to take welded auxiliary device under pressure.

As shown in fig. 1, the auxiliary device for the pressure welding of the pressure pipe includes an outer cylinder 10 and an inner core 20. One end of the outer cylinder 10 is an air inlet 11, one end of the outer cylinder 10 close to the air inlet 11 is spot-welded at the leakage position of the pressure pipeline, and the wall of the outer cylinder 10 is provided with an air outlet 12; the inner core 20 extends into the outer cylinder 10 from one end of the outer cylinder 10 far away from the air inlet 11, the inner core 20 can move along the axial direction of the outer cylinder 10, when the inner core 20 moves towards the air inlet 11, the inner core 20 can block the air inlet 11, and when the inner core 20 moves away from the air inlet 11, the air inlet 11 and the air outlet 12 can be communicated.

When welding the leakage position of the pressure pipe, the inner core 20 is moved in a direction away from the inlet port 11, so that the inlet port 11 and the outlet port 12 of the outer cylinder 10 can communicate with each other. One end of the outer cylinder 10 near the air inlet 11 is spot-welded to a leakage position of the pressure pipe. Because the air inlet 11 and the air outlet 12 of the outer cylinder 10 can be communicated, the gas leaked in the pressure pipeline can enter the air inlet 11 and then is discharged from the air outlet 12, the leakage amount of the gas from the periphery of the outer cylinder 10 can be obviously reduced, the pressure can also be reduced, the leakage positions at the periphery of the outer cylinder 10 are all subjected to leakage repairing welding at the moment, after the welding is completed, the inner core 20 is moved towards the direction close to the air inlet 11, the inner core 20 blocks the air inlet 11, the blocking work can be completed, after the long-time use, in order to prevent the leakage between the inner core 20 and the outer cylinder 10, the inner core 20, the outer cylinder 10 and the air outlet 12 on the outer cylinder 10 can be all subjected to welding blocking, and the purpose.

As shown in fig. 1, the end of the inner core 20 facing the air outlet 12 has a first tapered structure 23, and when the inner core 20 moves toward the air inlet 11, the first tapered structure 23 can block the air inlet 11. In this embodiment, the end of the inner core 20 facing the air outlet 12 has a first tapered structure 23, and the end of the first tapered structure 23 close to the air inlet 11 is a small end. When the inner core 20 moves in the direction of approaching the air inlet 11 of the outer cylinder 10, the first tapered structure 23 also moves in the direction of approaching the air inlet 11, so that the air inlet 11 can be gradually blocked. The first conical structure 23 is arranged on the inner core 20 to block the air inlet 11, so that the blocking effect can be improved, meanwhile, the blocking process is gradual, the air flow is gradually reduced, and the condition of sudden change of the air flow cannot occur.

When the inner core 20 moves towards the direction away from the air inlet 11 of the outer cylinder 10, the first conical structure 23 also moves towards the direction away from the air inlet 11, at this time, the air inlet 11 of the outer cylinder 10 is gradually opened, the air flow is gradually increased, the situation of sudden change of the air flow is avoided, and the potential safety hazard is reduced.

As shown in fig. 1, the inner wall of the outer cylinder 10 is opened with a second tapered structure 15 between the air inlet 11 and the air outlet 12, the second tapered structure 23 is matched with the first tapered structure 23, and the first tapered structure 23 is attached to the second tapered structure 15 to close the air inlet 11. In this embodiment, in order to ensure that the first tapered structure 23 is attached to the second tapered structure 15, one end of the first tapered structure 23 close to the air inlet 11 is also a small end, the first tapered structure 23 and the second tapered structure 15 have the same taper, and the small end of the first tapered structure 23 is smaller than the small end of the second tapered structure 15. When the inner core 20 moves towards the direction close to the air inlet 11 of the outer cylinder 10, the first conical structure 23 also moves towards the direction close to the air inlet 11, the first conical structure 23 is gradually attached to the second conical structure 15, the attached plugging between the first conical structure 23 and the second conical structure 15 is surface-to-surface attached plugging, the area of plugging is larger, and a better plugging effect is achieved. The face-to-face seal between the first tapered structure 23 and the second tapered structure 15 reduces the stress therebetween.

As shown in fig. 1, the outer cylinder 10 includes a first small diameter section 13 and a first large diameter section 14 connected in sequence, an air inlet 11 is provided at an end of the first small diameter section 13, and an air outlet 12 is opened at a side wall of the first large diameter section 14. In this embodiment, the end of the outer cylinder 10 where the air inlet 11 is located needs to be spot welded to the leakage position of the pressure pipe, and the air inlet 11 is disposed at the first small diameter section 13 and is easier to weld to the leakage position of the pressure pipe during the welding process. Because the outer cylinder 10 needs to be spot-welded, in the spot-welding process, the spot-welded part of the outer cylinder 10 can deform to a certain extent due to the high temperature, the exhaust port 12 is formed in the side wall of the first large-diameter section 14, the first large-diameter section 14 is not directly spot-welded, the deformation amount is small, and the shape of the exhaust port 12 cannot be affected.

As shown in fig. 1, a transition section 16 is provided at a connection position of the first small diameter section 13 and the first large diameter section 14. An intermediate section 16 is provided at the connection position of the first small diameter section 13 and the first large diameter section 14 to reduce the stress of the two. The air inlet 11 is arranged at the first small-diameter section 13, so that the first small-diameter section 13 needs to be welded at the leakage position of the pressure pipeline, after the leakage position around the outer cylinder 10 is completely subjected to leak repairing welding, the inner core 20, the outer cylinder 10 and the air outlet 12 on the outer cylinder 10 need to be subjected to welding plugging, and the purpose of permanent plugging is achieved.

As shown in fig. 1, the inner core 20 includes a second small diameter section 21 and a second large diameter section 22 connected in sequence, the second small diameter section 21 faces the air inlet 11 of the outer cylinder 10, an inner wall of the first large diameter section 14 is provided with an internal thread, and an outer wall of the second large diameter section 22 is provided with an external thread matching the internal thread. Since the outer cylinder 10 is divided into the first small diameter section 13 and the first large diameter section 14, the corresponding inner core 20 is provided with the second small diameter section 21 and the second large diameter section 22 matching therewith. The inner wall of the first large-diameter section 14 is provided with an internal thread, and the outer wall of the second large-diameter section 22 is provided with an external thread matched with the internal thread, so that the first large-diameter section and the second large-diameter section can perform necessary relative movement. In this embodiment, the first tapered structure 23 is open at the end of the second small diameter section 21 of the inner core 20, and the second tapered structure 15 is open at the end of the first small diameter section 13.

As shown in fig. 1, when the inner core 20 blocks the air inlet 11, the second small diameter section 21 is located at the position of the air outlet 12. In this embodiment, when the inner core 20 blocks the air inlet 11, the first tapered structure 23 on the inner core 20 is engaged with the second tapered structure 15 on the outer cylinder 10 to block the air inlet 11. Because the outer wall of second major diameter section 22 is seted up with internal thread fit's external screw thread, consequently second major diameter section 22 does not set up the screw thread in the position of seting up gas vent 12, and when inner core 20 shutoff air inlet 11, second minor diameter section 21 is located the position of gas vent 12, can guarantee when inner core 20 removes to keeping away from air inlet 11 direction, and air inlet 11 is opened, and gas can in time be followed gas vent 12 and is discharged, can not stay in urceolus 10.

As shown in fig. 1, when the inner core 20 blocks the air inlet 11, at least a part of the second large diameter section 22 protrudes from the outer cylinder 10. In the actual welding process, the inner core 20 needs to move relative to the outer cylinder 10, and in this embodiment, the inner core 20 and the outer cylinder 10 are relatively moved through threads, so that a screwed portion needs to be left on the inner core 20. The protruding end of the second large-diameter section 22 is fixedly connected with a screwing section 24, and the cross section of the screwing section 24 is hexagonal, so that the screwing operation can be conveniently performed by an operator, and the inner core 20 can move relative to the outer cylinder 10. Since the outer cylinder 10 needs to be spot-welded to a leakage position of the pressure pipe, the outer cylinder 10 may deform during welding, and a wrench may be required to perform an auxiliary operation when the inner core 20 is screwed in a direction close to the air inlet 11 of the outer cylinder 10, so that the screwing section 24 is provided to facilitate the wrench operation.

The utility model provides a be used for pipeline under pressure welded auxiliary device has following technological effect:

1. the utility model provides a be used for pipeline under pressure auxiliary device of welding can take the pressure to weld the leaking stoppage at not cutting off the voltage source.

2. The utility model provides a be used for pipeline under pressure auxiliary device who welds can prevent that pressure medium from blowing away electric welding molten metal when the welding is pressed in the area.

3. The utility model provides a be used for pipeline under pressure welded auxiliary device mending leakage time weak point, can carry out the shutoff to leaking the big pipeline of leakage quantity.

4. The utility model provides a be used for pipeline under pressure auxiliary device who welds all welds the shutoff with gas vent 12 on inner core 20, urceolus 10, the urceolus 10 after the leaking stoppage is accomplished, prevents the secondary leakage, and the reliability is high.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An auxiliary device for pressure pipe belt welding is characterized by comprising:

the outer cylinder (10), one end of the outer cylinder (10) is an air inlet (11), one end of the outer cylinder (10) close to the air inlet (11) is welded to the leakage position of the pressure pipeline in a spot mode, and an air outlet (12) is formed in the wall of the outer cylinder (10);

inner core (20), inner core (20) follow the urceolus (10) are kept away from the one end of air inlet (11) stretch into in urceolus (10), inner core (20) can be followed the axial displacement of urceolus (10), inner core (20) to when air inlet (11) remove, inner core (20) can the shutoff air inlet (11), inner core (20) to keeping away from when air inlet (11) remove, air inlet (11) with exhaust port (12) can communicate.

2. Auxiliary device for pressure pipe welding with pressure according to claim 1, characterized in that the end of the inner core (20) facing the air outlet (12) has a first conical structure (23), and when the inner core (20) moves towards the air inlet (11), the first conical structure (23) can block the air inlet (11).

3. The auxiliary device for the pressure welding of the pressure pipeline according to the claim 2, characterized in that the inner wall of the outer cylinder (10) between the air inlet (11) and the air outlet (12) is opened with a second cone structure (15) matched with the first cone structure (23), and the first cone structure (23) is jointed with the second cone structure (15) to close the air inlet (11).

4. The auxiliary device for the pressure welding of the pressure pipeline according to the claim 1, characterized in that the outer cylinder (10) comprises a first small diameter section (13) and a first large diameter section (14) which are connected in sequence, the air inlet (11) is arranged at the end of the first small diameter section (13), and the air outlet (12) is arranged at the side wall of the first large diameter section (14).

5. Auxiliary device for pressure welding of pipes under pressure according to claim 4, characterized in that the connection point of the first small diameter section (13) and the first large diameter section (14) is provided with a transition section (16).

6. The auxiliary device for the pressure welding of the pressure pipeline is characterized in that the inner core (20) comprises a second small-diameter section (21) and a second large-diameter section (22) which are connected in sequence, the second small-diameter section (21) faces to the air inlet (11) of the outer cylinder (10), the inner wall of the first large-diameter section (14) is provided with an internal thread, and the outer wall of the second large-diameter section (22) is provided with an external thread matched with the internal thread.

7. Auxiliary device for pressure welding of pipes according to claim 6, characterized in that the second small diameter section (21) is located at the position of the exhaust opening (12) when the inner core (20) blocks the inlet opening (11).

8. Auxiliary device for pressure welding of pipes according to claim 6, characterized in that at least a part of the second large diameter section (22) protrudes from the outer cylinder (10) when the inner core (20) blocks the air inlet (11).

9. Auxiliary device for pressure welding of pressure pipes according to claim 8, characterized in that the protruding end of the second large diameter section (22) is fixedly connected with a screw section (24).

10. Auxiliary device for pressure welding of pipes under pressure according to claim 9, characterized in that the cross section of the screw segments (24) is hexagonal.