CN210306364U - Duckbilled argon filling device for welding - Google Patents

Abstract

The utility model discloses a duckbilled argon filling device for welding, which comprises two pipelines to be welded, easily soluble paper and sealing paper adhered to the periphery of a welding opening, and an argon conveying pipe; the argon conveying pipe comprises an extending section and a fixing section, and the extending section is communicated with the fixing section; the extending section is provided with a flat opening which has the length larger than the width and extends to the welding opening, and the extending section is provided with a through hole for outputting argon gas into the pipeline to be welded; the argon conveying pipe is fixedly connected with a gas conveying pipe which is positioned at the welding opening and extends from the inside to the outside of the pipeline to be welded. The utility model discloses can practice thrift the argon gas of rushing into when welding, improve the welding seam quality. The utility model is suitable for pipeline welding, in particular to the welding of high alloy pipelines; the anti-oxidation welding device is used for injecting protective gas into a pipeline to be welded so as to perform anti-oxidation protection on the bottom of a welding seam.

Description

Duckbilled argon filling device for welding

Technical Field

The utility model belongs to the technical field of the welding argon filling protection, relate to the argon filling device, specifically speaking are argon filling device is used in duckbilled formula welding.

Background

With the more advanced installation of mechanical equipment in power plants, chemical plants, nuclear power plants and the like, the parameters and the requirements on pipelines for conveying media are higher, and the high-alloy materials are more and more widely applied, such as P91, P92, stainless steel and the like. When the high-alloy pipelines are welded, argon or other inert gases are required to be filled into a welding opening, and the bottom of a welding seam is protected against oxidation. The argon filling device in the prior art easily causes the too high pressure of argon gas in a pipeline to be welded to damage soluble paper, so that the argon gas diffuses into the pipeline to be welded, and the soluble paper is lost to form a closed space at a welding opening, thereby causing the waste of the argon gas.

SUMMERY OF THE UTILITY MODEL

For solving exist among the prior art more than not enough, the utility model aims at providing a duckbilled formula argon filling device for welding to reach the argon gas that fills when practicing thrift the welding, improve the purpose of welding seam quality.

In order to achieve the above object, the utility model adopts the following technical scheme: an argon filling device for duckbill type welding comprises two pipelines to be welded, easily-soluble paper which can prevent argon from diffusing into the pipelines to be welded, sealing paper which is bonded on the periphery of a welding opening and an argon conveying pipe which is positioned at the welding opening and used for conveying argon into the pipelines to be welded, wherein the two pipelines to be welded are bonded with the easily-soluble paper;

the argon conveying pipe comprises an extending section extending into the pipeline to be welded and a fixing section arranged outside the pipeline to be welded and connected with an argon source, and the extending section is communicated with the fixing section; the extending section is provided with a flat opening which has the length larger than the width and extends to the welding opening, and the extending section is provided with a through hole for outputting argon gas into the pipeline to be welded;

the argon conveying pipe is fixedly connected with a gas conveying pipe which is positioned at the welding opening and extends from the inside to the outside of the pipeline to be welded.

As the utility model discloses a injecing, the canned paragraph is circular pipe, and the section of stretching into is square pipe, and the canned paragraph is the round platform shape tubulose with the section department of meeting of stretching into.

As a further limitation of the utility model, the extension section is a square tube with a width of 2mm and a length of more than the width.

As another limitation of the utility model, the two opposite sides of the extending section are provided with symmetrical through holes.

As a further limitation of the present invention, the sealing paper is tin foil paper.

Since the technical scheme is adopted, compared with the prior art, the utility model, the beneficial effect who gains is:

(1) the utility model can form a relatively closed air chamber between two pipelines to be welded at the welding position by arranging the soluble paper and the sealing paper, so as to fill argon into the closed air chamber;

(2) the argon conveying pipe is arranged, so that argon is easily conveyed to the pipeline to be welded through the argon conveying pipe; the extending section adopts a flat opening with the length larger than the width, so that the distance of a welding line is reserved between two pipelines to be welded, and more argon can be filled into the pipelines to be welded;

(3) the utility model adopts the tubular fixed section, which can increase the flow area of argon gas and is easy to convey the argon gas to the extending section; the fixing section is easy to clamp and fix at the groove of the pipeline to be welded by adopting the truncated cone-shaped transition between the fixing section and the extending section, and the argon conveying pipe has a certain positioning effect;

(4) the utility model utilizes the characteristic that the molecular weight (39) of argon is larger than the molecular weight (29) of air, and replaces the air in the pipeline to be welded while conveying argon to the pipeline to be welded by arranging the gas pipe, so that the situation that the easily soluble paper is damaged due to the too large pressure of the argon in the closed air chamber can be effectively prevented by arranging the gas pipe; the gas transmission pipe can also detect whether the argon concentration in the pipeline to be welded reaches the welding standard, when a lighter cannot ignite at the gas outlet of the gas transmission port, the argon concentration in the gas chamber reaches the welding standard, the closed gas chamber is continuously filled with argon, and welding and bottoming are started;

(5) the utility model discloses a both sides face symmetry at the section of stretching into sets up the through-hole, can carry out anti-oxidation protection to the welding seam bottom to improve the quality of welding seam.

To sum up, the utility model discloses simple manufacture, convenient operation, practicality are strong.

The utility model is suitable for pipeline welding, in particular to the welding of high alloy pipelines; the anti-oxidation welding device is used for filling protective gas into a pipeline to be welded so as to carry out anti-oxidation protection on the bottom of a welding seam.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a view from a in fig. 1.

In the figure: 1. a pipe to be welded; 21. a fixed section; 22. an extension section; 3. easily soluble paper; 4. sealing paper; 5. a gas delivery pipe; 6. and a through hole.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that the preferred embodiments described herein are for purposes of illustration and understanding only and are not intended to limit the invention.

Embodiment is argon filling device for duckbilled welding

In the embodiment, the easily-soluble paper 3 and the sealing paper 4 are used for forming a relatively closed air chamber at the welding opening of the two pipelines 1 to be welded, and argon is filled into the closed space through the argon conveying pipe so as to perform anti-oxidation protection on the bottom of the welding seam. And when argon is conveyed into the pipeline 1 to be welded by the argon conveying pipe, the air conveying pipe 5 replaces the air in the pipeline 1 to be welded, so that the easily-soluble paper is prevented from being damaged due to the high pressure of the argon in the pipeline.

As shown in fig. 1 to 2, the present embodiment includes an easy-dissolving paper 3, a sealing paper 4, an argon conveying pipe, and a gas conveying pipe 5.

Easily soluble paper 3 and sealing paper 4

The soluble paper 3 and the sealing paper 4 are used for forming a relatively closed air chamber at the welding openings of the two pipelines 1 to be welded.

The two pipelines 1 to be welded are both adhered with the soluble paper 3, and the soluble paper 3 is positioned on a plane vertical to the axis of the pipeline 1 to be welded, so that the soluble paper is circular. Before the pipelines 1 to be welded are butted, the easily-soluble paper 3 is pasted on the inner wall of the pipeline 1 to be welded, which is 200mm away from the welding opening, through paste, and is tightly adhered and compacted so as to avoid the filled argon from re-diffusing to the interior of the pipeline 1 to be welded. The soluble paper 3 adopts the sealing material used for welding protective gas in the prior art, such as water-soluble paper and soluble paper.

The sealing paper 4 is bonded to the outer periphery of the weld opening to prevent the argon gas filled in the pipe 1 to be welded from diffusing outward from the weld opening. The sealing paper 4 is made of high-temperature-resistant tin foil paper to form a closed air chamber.

Second, argon conveying pipe

The argon conveying pipe is used for conveying argon of an argon source into the closed air chamber so as to perform anti-oxidation protection on the welding seam. The argon conveying pipe comprises an integrally formed extending section 22 and a fixing section 21.

The fixed section 21 is arranged outside a welding opening of the pipeline 1 to be welded, one end of the fixed section 21 is connected with the argon bottle, and the other end of the fixed section 21 is fixedly connected with the extending section 22. The fixed section 21 is a circular tube with an inner diameter of 30 mm.

The extending section 22 extends into the pipeline 1 to be welded and is communicated with the fixed section 21. The extending section 22 is a square flat tube with an opening gap of 2mm, which is formed by flattening a circular tube with an inner diameter of 30mm into a flat opening, so that the extending section 22 has a flat opening extending to the welding opening, and the cross section of the flat opening is a rectangle with a length larger than the width. Through holes 6 for filling argon gas into the pipeline 1 to be welded are symmetrically formed in two opposite side surfaces of the extending section 22, in the embodiment, four through holes 6 with the diameter of 2mm are formed in each side surface, and eight through holes 6 are formed in total.

The joint of the extending section 22 and the fixing section 21 is in a shape of a circular truncated cone, and the joint of the extending section and the fixing section can be clamped and fixed at a groove of a welding seam of the pipeline 1 to be welded, so that the argon conveying pipe is easy to fix.

Third, gas pipe 5

The air delivery pipe 5 is used for delivering air in the pipeline 1 to be welded to the outside of the pipeline 1 to be welded. The gas pipe 5 is fixedly connected to the argon conveying pipe, the gas pipe 5 is in a circular pipe shape, and the gas pipe 5 is arranged at the welding opening and extends from the inner part of the pipeline 1 to be welded to the outer part of the pipeline 1 to be welded. In this embodiment, the argon delivery pipe and the gas delivery pipe 5 are both made of copper pipes.

Fourth, the working process

When the argon welding method is used, the argon bottle and the argon meter are opened, argon is conveyed into the sealed air chamber formed by the sealing paper 4 and the soluble paper 3 in the pipeline 1 to be welded through the argon conveying pipe, when the argon is conveyed into the pipeline 1 to be welded, because the molecular weight (39) of the argon is larger than the molecular weight (29) of air, the air in the pipeline 1 to be welded is discharged out of the pipeline 1 to be welded through the air conveying pipe 5, and therefore the air in the sealed air chamber is replaced. In addition, the gas pipe 5 can also prevent the easy-to-dissolve paper 3 from being damaged due to the too high pressure of the argon gas in the closed gas chamber.

After a certain amount of argon gas is conveyed into the closed gas chamber, when the lighter can not ignite at the exhaust port of the gas conveying pipe 5, the concentration of the argon gas in the closed gas chamber reaches the welding standard, at the moment, the closed gas chamber is continuously filled with the argon gas, and welding and bottoming are started. And after the welding bottoming is finished, performing the first welding. During the welding process, the argon conveying pipe always fills argon into the pipeline 1 to be welded so as to carry out anti-oxidation protection on the back of the welding seam. After the first welding, the gas pipe 5 and the argon conveying pipe are taken out from the welding opening, and the gap between the gas pipe 5 and the argon conveying pipe is bottomed and welded.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it will be apparent to those skilled in the art that modifications can be made to the technical solutions described in the above-mentioned embodiments, or some technical features can be replaced with equivalents. 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 (5)

1. The utility model provides a duckbilled argon filling device for welding which characterized in that: the argon welding device comprises two pipelines to be welded, easily-soluble paper which can prevent argon from diffusing into the pipelines to be welded, sealing paper which is bonded on the periphery of a welding opening and an argon conveying pipe which is positioned at the welding opening and used for conveying argon into the pipelines to be welded;

the argon conveying pipe comprises an extending section extending into the pipeline to be welded and a fixing section arranged outside the pipeline to be welded and connected with an argon source, and the extending section is communicated with the fixing section; the extending section is provided with a flat opening which has the length larger than the width and extends to the welding opening, and the extending section is provided with a through hole for outputting argon gas into the pipeline to be welded;

the argon conveying pipe is fixedly connected with a gas conveying pipe which is positioned at the welding opening and extends from the inside to the outside of the pipeline to be welded.

2. The argon filling device for duckbill welding according to claim 1, wherein: the fixed section is a circular pipe, the stretching section is a square pipe, and the joint of the fixed section and the stretching section is in a shape of a circular truncated cone.

3. The argon filling device for duckbill welding according to claim 2, wherein: the stretching section is a square pipe with the width of 2mm and the length of 2mm larger than the width.

4. The argon filling device for duckbill welding according to any one of claims 1 to 3, wherein: two opposite side surfaces of the extending section are provided with through holes which are symmetrically arranged.

5. The duckbill argon filling apparatus for welding according to claim 4, wherein: the sealing paper is tin foil paper.

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