CN211804325U

CN211804325U - Argon filling protection device for welding inner wall of branch pipe table of P91 pipeline

Info

Publication number: CN211804325U
Application number: CN201922089662.1U
Authority: CN
Inventors: 马文军; 李琳; 汪伟; 张德杰
Original assignee: Shaanxi Xiyu Non Destructive Testing Co
Current assignee: Shaanxi Xiyu Non Destructive Testing Co
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-10-30
Anticipated expiration: 2029-11-28

Abstract

The utility model relates to a protection device for welding inner wall of a P91 pipeline branch pipe table and argon filling. In order to solve the technical problem of uncontrollable welding quality in the prior art, the technical scheme provides an argon filling protection device for the welding inner wall of a branch pipe table of a P91 pipeline, which comprises a hollow pipe body for collecting and uniformly dispersing argon; the top of cavity body is provided with the argon gas mouthpiece of admitting air, and the upper end pipe wall of cavity body is fitted with a contraceptive ring and is equipped with the sealed pad one that is used for blocking the branch pipe table orificial, and the lower extreme pipe wall is equipped with a plurality of exhaust hole that is used for argon gas exhaust, the bottom welding of cavity body have the nut, the nut lower extreme is connected with the bolt, is provided with sealed pad two between bolt and the nut.

Description

Argon filling protection device for welding inner wall of branch pipe table of P91 pipeline

Technical Field

The utility model relates to a protection device for welding inner wall of a P91 pipeline branch pipe table and argon filling.

Background

At present, in the field of petrochemical engineering construction, when pipelines made of stainless steel and made of special materials are welded, protective gas is not only a protective medium in a welding area, but also a gas medium for generating electric arcs, and argon commonly used for stainless steel welding is one of the protective medium and the gas medium, is inert gas, hardly generates chemical reaction with any metal, and is not dissolved in the metal, so that the argon has good protection effect and good arc stabilizing property due to the characteristics.

Some metals and alloys which are very sensitive to oxidation or stainless steel materials which are slow in heat dissipation and long in high-temperature retention time require that argon is introduced to the back of the welding seam in the welding process so as to achieve a stronger protection effect and prevent porous or honeycomb defects and the like caused by oxidation of the back of the root of the welding seam.

The common argon filling protection method is to plug two ends of a pipeline by using materials such as sponge, rubber plates and the like, then plug the outer side of a welding seam by using adhesive tapes, continuously fill argon gas after a closed space is formed, and remove the adhesive tapes at the welding position of the welding seam for welding in the welding process. When the method is used for welding the pipeline branch pipe table, the plugging material is not easy to take out after being welded, the replacement gas is not uniform, mixed gas is easy to form, the welding quality is not controllable, field solutions are few, the existing solutions are not strong in universality, the back surface is not uniformly protected by argon filling, and the expected effect cannot be achieved.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a solve the uncontrollable technical problem of welding quality who exists among the prior art, provide one kind and be used for P91 pipeline branch pipe platform welding inner wall argon filling protection device.

For solving the problems existing in the prior art, the technical scheme of the utility model is that: the utility model provides a be used for P91 pipeline branch pipe platform welding inner wall argon filling protection device which characterized in that: comprises a hollow pipe body for collecting and uniformly dispersing argon gas; the top of cavity body is provided with the argon gas mouthpiece of admitting air, and the upper end pipe wall of cavity body is fitted with a contraceptive ring and is equipped with the sealed pad one that is used for blocking the branch pipe table orificial, and the lower extreme pipe wall is equipped with a plurality of exhaust hole that is used for argon gas exhaust, the bottom welding of cavity body have the nut, the nut lower extreme is connected with the bolt, is provided with sealed pad two between bolt and the nut.

The outer pipe wall of the upper end of the hollow pipe body is provided with an external thread, the external thread is provided with an upper sealing gasket fixing nut and an upper sealing gasket positioning nut, and a sealing gasket I is arranged between the upper sealing gasket fixing nut and the upper sealing gasket positioning nut and is positioned through the upper sealing gasket fixing nut and the upper sealing gasket positioning nut.

The argon gas inlet pipe nozzle is welded with the hollow pipe body.

The exhaust holes are uniformly distributed.

The first sealing gasket and the second sealing gasket are made of rubber. Compared with the prior art, the utility model has the advantages as follows:

1) the structure of the utility model is used for welding the branch pipe table and the pipeline, the back of the welding seam is always in the argon filling protection state when welding can be ensured, the argon protection is suitable, the backing welding speed and the quality of the whole welding seam can be greatly improved, the time and the labor cost are saved, and the argon demand is saved compared with the conventional tool;

2) the utility model can ensure that the relatively airtight space is completely filled with argon, the back of the welding seam is well protected, the problem that the welding cannot be carried out due to insufficient argon is avoided, and the welding quality is indirectly improved;

3) the utility model discloses make full use of air cycle principle, after obtaining the argon gas of capacity through the air inlet, can arrange the air in the branch pipe platform to the atmosphere along welding seam department.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the utility model in use;

1-an intake nozzle; 2-a hollow pipe body; 3, sealing gasket I; 4-a branch pipe table; 5-main pipe; 6-sealing gasket II; 7-fixing a nut on the upper sealing gasket; 8-positioning a nut on the upper sealing gasket; 9-a nut; 10-bolt, 11-exhaust hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment provides a protection device for welding an inner wall of a branch pipe table of a P91 pipeline and filling argon, which comprises a hollow pipe body 2 with holes on the circumferential surface, a gas pipe and a gas pipe, wherein the hollow pipe body 2 is used for collecting and uniformly dispersing the argon; the top of the hollow pipe body 2 is welded with an argon gas inlet pipe nozzle 1, and the argon gas inlet pipe nozzle 1 is connected with an argon gas inlet pipe; the bottom of the hollow pipe body 2 is welded with a nut 9, the lower end of the nut 9 is connected with a bolt 10, and a second sealing gasket 6 is arranged between the bolt 10 and the nut 9.

The lower end pipe wall of the hollow pipe body 2 is uniformly provided with a plurality of exhaust holes 11 for discharging argon.

The upper end pipe wall of above-mentioned cavity body 2 is fitted with a contraceptive ring and is equipped with the sealed pad 3 that is used for blocking the branch pipe table orificial, be provided with the external screw thread on the outer pipe wall of the upper end of cavity body 2, be provided with the sealed fixing nut 7 of upper padding and the sealed positioning nut 8 of upper padding on the external screw thread, sealed pad 3 sets up between the sealed fixing nut 7 of upper padding and the sealed positioning nut 8 of upper padding and fixes a position through the sealed fixing nut 7 of upper padding and the sealed positioning nut 8 of upper.

The upper part of the second sealing gasket 6 of the lower hollow pipe body 2 is welded with a nut 9, and the nut 9 is connected with a bolt 10.

The first sealing gasket 3 and the second sealing gasket 6 are made of high-temperature resistant rubber products.

The dimensions of the hollow pipe body 2, the first sealing gasket 3 and the second sealing gasket 6 need to be manufactured according to the actual dimensions of the openings on the welded branch pipe table 4 and the welded pipeline 5.

The utility model discloses a working process, as shown in FIG. 2:

when in use, the hollow tube body 2 is put into the branch tube table 4, the sealing gasket I3 is supported in the tube mouth of the branch tube table 4 to be contacted with the tube mouth of the branch tube table 4 to realize the sealing of the tube mouth of the branch tube table, the sealing gasket II 6 at the lower end extends into the pipeline 5 welded with the branch tube table 4, the argon gas inlet tube nozzle 1 is directly connected with a gas source or an argon gas bottle, the valve of the argon gas bottle is opened, the valve is adjusted according to the argon gas flow required by the process, the argon gas is led into the hollow tube body 2 through the argon gas inlet tube nozzle 1 and then enters into the branch tube table 4 through the exhaust hole 11 at the lower end of the hollow tube body, the air in the branch tube table is discharged through the welding seam, the purpose of establishing the argon gas chamber is achieved, wherein, the arrow in the figure 2 shows the flowing direction of the argon gas, the argon gas enters into the hollow tube body 2 from the argon gas inlet tube nozzle 1 and is discharged into the branch tube table, the air in the branch table 4 is moved downward and discharged to the atmosphere from the weld.

The hollow pipe body 2 is mainly used for collecting and uniformly dispersing argon, sufficient argon enters the hollow pipe body 2 to be gathered, airflow stably penetrates through the exhaust holes, the air in the branch pipe table 4 is extruded by the argon coming out of the hollow pipe body 2 by utilizing the principle that the specific gravity of the argon is greater than that of the air, and the air is guided to be discharged from a welding seam to form the circulating ventilation system.

The content of the present invention is not limited to the examples, and any equivalent transformation adopted by the technical solution of the present invention is covered by the claims of the present invention by those skilled in the art through reading the present invention.

Claims

1. The utility model provides a be used for P91 pipeline branch pipe platform welding inner wall argon filling protection device which characterized in that: comprises a hollow pipe body (2) for collecting and uniformly dispersing argon gas; the top of cavity body (2) is provided with argon gas inlet pipe mouth (1), and the upper end pipe wall of cavity body (2) is fitted with a contraceptive ring and is equipped with and is used for blocking the orificial sealed pad (3) of a branch pipe stand, and the lower extreme pipe wall is equipped with and is used for argon gas exhaust a plurality of exhaust hole (11), the bottom welding of cavity body (2) have nut (9), nut (9) lower extreme is connected with bolt (10), is provided with sealed pad two (6) between bolt (10) and nut (9).

2. The argon-filled protection device for the welding inner wall of the branch pipe platform of the P91 pipeline as claimed in claim 1, wherein: the sealing gasket is characterized in that an external thread is arranged on the outer pipe wall of the upper end of the hollow pipe body (2), an upper sealing gasket fixing nut (7) and an upper sealing gasket positioning nut (8) are arranged on the external thread, and a sealing gasket I (3) is arranged between the upper sealing gasket fixing nut (7) and the upper sealing gasket positioning nut (8) and is positioned through the upper sealing gasket fixing nut (7) and the upper sealing gasket positioning nut (8).

3. The argon-filled protection device for the welding inner wall of the branch pipe platform of the P91 pipeline as claimed in claim 2, wherein: the argon gas inlet nozzle (1) is welded with the hollow pipe body (2).

4. The argon-filled protection device for the welding inner wall of the branch pipe platform of the P91 pipeline as claimed in claim 3, wherein: the exhaust holes (11) are uniformly distributed.

5. The argon-filled protection device for the welding inner wall of the branch pipe platform of the P91 pipeline as claimed in claim 4, wherein: the first sealing gasket (3) and the second sealing gasket (6) are made of rubber.