Argon conveying equipment

Abstract

The utility model discloses argon conveying equipment, which is used for conveying argon to opposite welding end surfaces of two pipelines and comprises a sealing film and a moving module, the sealing film is used for blocking a cavity on the inner side of the welding end part of one pipeline, and the moving module can move in the other pipeline relative to the sealing film. A disc coaxial with the pipeline is arranged on the moving module, an air bag is arranged on the edge of the disc in the circumferential direction, the size of the air bag is controlled through an air pressure control device, and the device further comprises an air supply device for introducing argon into the position between the disc and the sealing film. The sealing film is arranged at the end of the pipeline, the moving module capable of moving and sealing is used for limiting the argon storage area at the welding seam of the pipeline, argon protection welding of the welding seam can be achieved only by filling argon into the limited area, the using amount of argon is reduced, the welding cost is reduced, and the welding efficiency is improved. And by means of continuous movement of the moving module in the pipeline, continuous welding of the pipeline can be achieved conveniently.

Description

Technical Field

[0001] This utility model relates to the field of pipeline welding technology, and in particular to an argon gas conveying device. Background Technology

[0002] Alloy steel pipes are a type of pipeline system material used to transport liquids or gases. Their applications are very wide, mainly including the following: Petroleum industry: Alloy steel pipes are frequently used in high-pressure, high-temperature pipeline systems for oil drilling, capable of withstanding extreme working environments and ensuring a stable supply of oil and gas. Chemical industry: Alloy steel pipes are more popular in many fields such as fertilizers, power generation, gas production, and refining. However, alloy steels, especially high-alloy steels such as T91 / P91 / F91, T92 / P92 / F92, and T122 / P122 / F122, have a martensitic structure and are generally supplied in a normalized + tempered state. They have poor weldability and are prone to problems such as cold cracking, weld joint embrittlement, and softening in the HAZ region. These materials are easily oxidized at high temperatures, therefore argon-shielded welding must be used to prevent oxidation at the weld root and ensure the quality of the weld joint. During argon-shielded welding, argon gas is introduced into the weld to form a protective layer, isolating the weld area from oxygen and preventing oxidation, thus ensuring weld quality. In addition, argon, as an inert gas, does not readily react chemically with other substances, effectively protecting the weld area and improving the performance and corrosion resistance of the welded joint.

[0003] In actual welding processes, argon gas is typically injected into the pipe from both ends to create an argon-rich environment inside the weld. However, for long pipes, injecting argon from both ends results in significant argon waste, leading to resource waste and increased costs. Therefore, a device is needed to directly deliver argon gas to the welding position to reduce argon consumption. Utility Model Content

[0004] To address the problem of how to deliver argon gas to the weld seam during pipeline welding, this invention proposes an argon gas delivery device that can deliver argon gas to the weld seam, thereby reducing the amount of argon gas used.

[0005] The technical solution adopted in this utility model is to design an argon gas delivery device for delivering argon gas to the welded end faces of two pipes. The device includes a sealing membrane that seals the inner cavity of the welded end of one of the pipes, and a moving module that can move relative to the sealing membrane within the other pipe. The moving module is provided with a disc coaxial with the pipe, and an airbag is provided circumferentially around the edge of the disc. The size of the airbag is controlled by a gas pressure control device. The device also includes a gas delivery device for introducing argon gas between the disc and the sealing membrane.

[0006] In some embodiments, a pointed portion is provided at the front of the disk facing the sealing membrane.

[0007] In some embodiments, the sealing film is a water-soluble paper film.

[0008] In some embodiments, the air supply device includes a flat tube capable of passing through a gap between the two welded end faces of the pipes.

[0009] In some embodiments, the air supply device includes an air outlet located on the moving module between the disk and the sealing membrane, the air outlet being connected to an external air supply device via an air supply pipeline.

[0010] In some embodiments, the disc is provided with an air passage communicating with the inner cavity of the airbag, and the air passage is connected to an external air pressure control device via an air pressure pipeline.

[0011] In some embodiments, the moving module includes several support wheels that support the inner wall of the pipe.

[0012] In some embodiments, at least one of the support wheels is a power wheel.

[0013] In some embodiments, a support block is also included connected to the disk, the support wheels are circumferentially distributed on the support block, and the support wheels are connected to the support block by a radial floating telescopic shaft.

[0014] In some embodiments, the radial floating telescopic shaft includes a radial shaft hole disposed on the support block and a telescopic shaft that slides within the radial shaft hole. A retaining ring is disposed on the telescopic shaft, and a cylindrical spring is supported between the retaining ring and the radial shaft hole. The end of the telescopic shaft is connected to the support wheel.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention utilizes a sealing membrane and a movable sealing module at the end of the pipe to define an area for storing argon gas at the weld seam. Argon gas can be filled into this defined area to achieve argon-protected welding of the weld seam, reducing the amount of argon gas used and lowering welding costs. The continuous movement of the movable module within the pipe facilitates continuous welding of the pipe. Attached Figure Description

[0017] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings. To illustrate the details and facilitate understanding of its principles, the drawings are not necessarily to scale, and similar reference numerals may describe similar components in different views. The accompanying drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Wherein:

[0018] Figure 1 This is a schematic diagram of the mobile module being inside the first pipe.

[0019] Figure 2 yes Figure 1 An enlarged diagram of point A in the diagram.

[0020] Figure 3 This is a schematic diagram of the mobile module being inside the second pipe.

[0021] In the diagram, 1. sealing membrane; 2. airbag; 3. first pipe; 4. second pipe; 5. third pipe; 6. weld; 7. disc; 8. air passage; 9. air pressure pipeline; 10. air outlet; 11. air supply pipeline; 12. support wheel; 13. support block; 14. radial shaft hole; 15. telescopic shaft; 16. retaining ring; 17. cylindrical spring; 18. motor; 19. tip; 20. flat tube. Detailed Implementation

[0022] The following are specific embodiments of this utility model, and the technical solution of this utility model will be further described with reference to the accompanying drawings. However, this utility model is not limited to these embodiments, and the following embodiments do not limit the utility model involved in the claims. In addition, all combinations of features described in the embodiments are not necessarily necessary for the solution of the utility model.

[0023] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments. Example

[0024] like Figure 1 , 2 As shown, an argon gas delivery device is used to deliver argon gas to the weld end face of two pipes, i.e., the inside of the pipe at weld 6, so that the inside of weld 6 is in an argon gas protective environment during welding.

[0025] The device includes a sealing membrane 1 that seals the inner cavity of the welded end of one of the pipes, and a movable module that can move relative to the sealing membrane 1 within another pipe. The movable module has a disc 7 coaxial with the pipe, and elastic air bladders 2 are circumferentially arranged around the edge of the disc 7. The size of the air bladders 2 is controlled by a pressure control device. The device also includes a gas supply device for introducing argon gas between the disc 7 and the sealing membrane 1. The sealing membrane 1 can be, for example, a water-soluble paper membrane, so that it can be easily cleaned with water later.

[0026] The disc is provided with an air passage 8 that communicates with the inner cavity of the airbag 2. The air passage 8 is connected to an external air pressure control device through an air pressure pipeline 9. The air pressure control device can be, for example, an air pump or other equipment that can control air pressure, so as to control the size of the airbag 2.

[0027] In use, the sealing membrane 1 is first sealed inside the left port of the first pipe 3. Then, the port of the second pipe 4 is adjacent to the port of the first pipe 3 to form a weld 6 to be welded. Then, the moving module enters from the other port of the second pipe 4 and moves to a position near the weld 6. Then, gas is injected into the airbag 2 using a pneumatic control device, such as an air pump, so that the airbag 2 expands and contacts the inner wall of the second pipe 4. The airbag 2 and the disc 7 together seal the end of the second pipe 4. At this time, argon gas can be injected into the pipe using a flat tube 20 that can pass through the gap between the welding ends of the two pipes. The flat tube has a flatter cross-section to facilitate insertion into a narrower weld. Since the moving block and the sealing membrane 1 respectively seal both sides of the weld 6, the injected argon gas is confined to the argon gas storage area inside the weld 6 between the moving block and the sealing membrane 1. This area is small, so the required amount of argon gas is small. After injection, the weld 6 can be welded. After welding, the gas in the airbag 2 can be discharged, making the airbag 2 smaller, and then the moving membrane block can move to the left and exit from the pipe. And, as... Figure 3 As shown, if it is necessary to weld a third pipe 5 to the right port of the first pipe 3, a sealing membrane 1 can be sealed on the left port of the third pipe 5. Then, the port is adjacent to the right port of the first pipe 3 to form a weld 6 to be welded. After the left end of the first pipe 3 is welded, the airbag 2 becomes smaller, and then the moving module moves to the right. The disc 7 is provided with a tip 19 facing the sealing membrane 1, so that the moving module can use the tip 19 to penetrate the sealing membrane 1 and continue to move forward until the right end of the first pipe 3, forming an argon storage area that defines argon with the end sealing membrane 1 of the third pipe 5. Then, argon is injected into this area to weld the weld 6. In this way, the pipe can be welded segment by segment.

[0028] Furthermore, in order to facilitate the delivery of argon to the argon storage area, other gas delivery devices can also be used for argon injection. For example, an outlet 10 is provided on the moving module between the disk 7 and the sealing membrane 1. The outlet 10 is connected to an external gas supply device through a gas delivery pipeline 11. The gas supply device can be, for example, a high-pressure argon cylinder.

[0029] To ensure stable movement of the moving module along the pipeline, the moving module is circumferentially equipped with several support wheels 12 supporting the inner wall of the pipeline. Specifically, the moving module includes a support block 13 connected to the disc 7. The support wheels 12 are circumferentially distributed on the support block 13. The support wheels 12 and the support block 13 are connected by a radially floating telescopic shaft 15. The radially floating telescopic shaft 15 includes a radial shaft hole 14 on the support block 13 and a telescopic shaft 15 that slides within the radial shaft hole 14. A retaining ring 16 is provided on the telescopic shaft 15, and a cylindrical spring 17 is supported between the retaining ring 16 and the radial shaft hole 14. The end of the telescopic shaft 15 is connected to the support wheel 12. This allows the support wheel 12 to float radially relative to the support block 13, adjusting the radial direction to adapt to different pipeline applications. At least one of the support wheels 12 is a power wheel, meaning that some support wheels 12 are driven to rotate by a power device such as a motor 18, thereby enabling the moving module to move along the pipeline.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An argon delivery apparatus for delivering argon gas to the opposed welding end faces of two pipes, characterized by, The application relates to a sealing film for sealing the inner cavity of the welded end of one of the pipes, and a moving module capable of moving in the other pipe relative to the sealing film, wherein a disc coaxial with the pipe is arranged on the moving module, a gas bag is arranged on the edge of the disc in a circumferential direction, the size of the gas bag is controlled by a gas pressure control device, and an argon gas feeding device is arranged between the disc and the sealing film.

2. The argon delivery apparatus of claim 1, wherein, A pointed end of the disc is arranged in front of the sealing film.

3. The argon delivery apparatus of claim 1, wherein, The sealing film is a water-soluble paper film.

4. The argon delivery apparatus of claim 1, wherein, The argon gas feeding device comprises a flat pipe capable of passing through the gap between the welded end faces of the two pipes.

5. The argon delivery apparatus of claim 1, wherein, The argon gas feeding device comprises an air outlet arranged on the moving module between the disc and the sealing film, and the air outlet is connected with a gas supply device outside the pipe through a gas feeding pipeline.

6. The argon delivery apparatus of claim 1, wherein, A gas channel is arranged on the disc and communicates with the inner cavity of the gas bag, and the gas channel communicates with a gas pressure control device outside the pipe through a gas pressure pipeline.

7. The argon delivery apparatus of claim 1, wherein, The moving module comprises a plurality of supporting wheels supporting the inner wall of the pipe.

8. The argon delivery apparatus of claim 7, wherein, At least one of the supporting wheels is a power wheel.

9. The argon delivery apparatus of claim 7, wherein, A supporting block is further arranged on the disc, the supporting wheels are distributed on the supporting block in a circumferential direction, and the supporting wheels and the supporting block are connected through a radial floating expansion shaft.

10. The argon delivery apparatus of claim 9, wherein, The radial floating expansion shaft comprises a radial shaft hole arranged on the supporting block and a sliding expansion shaft matched in the radial shaft hole, a snap ring is arranged on the expansion shaft, a cylindrical spring is supported between the snap ring and the radial shaft hole, and the end of the expansion shaft is connected with the supporting wheel.

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