阅读说明：本技术 不锈钢管道防氧化焊接方法 (Stainless steel pipeline anti-oxidation welding method ) 是由 陈祖荣 黄种利 陈金辉 李贤庆 林程 杨黎峰 于 2019-10-11 设计创作，主要内容包括：本发明涉及一种不锈钢管道防氧化焊接方法,包括以下步骤：将两节待焊接的不锈钢管道放置于支撑定位台上,并相互贴近；在其中一待焊接的不锈钢管道的外侧端封堵上第一塞块,并在另一待焊接的不锈钢管道的外侧端封堵上带有氩气充气管的第二塞块；在两节待焊接的不锈钢管道相邻的端部上贴设高温胶带,并在高温胶带上开设排气孔；将氩气充气管与氩气罐相连通,并通过氩气充气管向待焊接的不锈钢管道内持续通入氩气；待焊接管道内的空气排出后,从高温胶带缺口处开始焊接,并且边焊接边将高温胶带撕除,直至连接管道连接的端部全部完成焊接。该焊接方法有助于在焊接过程中防止不锈钢管道被氧化。(The invention relates to an anti-oxidation welding method for a stainless steel pipeline, which comprises the following steps: placing two sections of stainless steel pipelines to be welded on a supporting and positioning table and enabling the two sections of stainless steel pipelines to be close to each other; plugging a first chock at the outer side end of one stainless steel pipeline to be welded, and plugging a second chock with an argon gas filling pipe at the outer side end of the other stainless steel pipeline to be welded; adhering high-temperature adhesive tapes to the adjacent end parts of the two stainless steel pipelines to be welded, and arranging exhaust holes on the high-temperature adhesive tapes; communicating an argon gas filling pipe with an argon gas tank, and continuously introducing argon gas into a stainless steel pipeline to be welded through the argon gas filling pipe; and after the air in the pipeline to be welded is exhausted, welding is started from the notch of the high-temperature adhesive tape, and the high-temperature adhesive tape is torn off while welding until the end part connected with the pipeline is completely welded. The welding method helps to prevent the stainless steel pipe from being oxidized during the welding process.)

1. An anti-oxidation welding method for stainless steel pipelines is characterized by comprising the following steps:

(1) placing two sections of stainless steel pipelines to be welded on a supporting and positioning table and enabling the two sections of stainless steel pipelines to be close to each other;

(2) plugging a first chock at the outer side end of one stainless steel pipeline to be welded, and plugging a second chock with an argon gas filling pipe at the outer side end of the other stainless steel pipeline to be welded;

(3) adhering high-temperature adhesive tapes to the adjacent end parts of the two stainless steel pipelines to be welded, and arranging exhaust holes on the high-temperature adhesive tapes;

(4) communicating an argon gas filling pipe with an argon gas tank, and continuously introducing argon gas into a stainless steel pipeline to be welded through the argon gas filling pipe;

(5) after the air in the pipeline to be welded is exhausted, tearing a gap of the high-temperature adhesive tape from the lower end of the welding line to be welded, starting welding, and tearing off the high-temperature adhesive tape while welding until the end part connected with the pipeline is completely welded;

(6) and after the bottoming of the welding is finished, stopping argon filling or continuously introducing argon at a small flow rate, and pulling out the first chock and the second chock after the welding of the whole welding seam is finished.

2. The method for the oxidation-resistant welding of the stainless steel pipelines according to claim 1, wherein the supporting and positioning table comprises a supporting seat, a pair of fixing plates are transversely arranged at the upper end of the supporting seat in parallel, and convex edges which are protruded upwards and used for limiting the pipelines to be welded are respectively arranged on the outer side edges of the fixing plates.

3. The method for welding stainless steel pipes with an oxidation resistance according to claim 2, wherein the support seats are vertically arranged support pipes, and the fixing plates are angle irons, respectively.

4. The stainless steel pipeline anti-oxidation welding method according to claim 1, 2 or 3, wherein the first chock block and the second chock block respectively comprise sponge blocks for plugging a pipeline to be welded, and sealing plates for sealing the outer side ends of the pipeline to be welded are connected to the outer side faces of the sponge blocks.

5. The method for the oxidation-resistant welding of the stainless steel pipeline according to claim 4, wherein the argon gas filling pipe sequentially passes through the sealing plate and the sponge block of the second chock block and extends into another stainless steel pipeline to be welded.

6. The method for the oxidation-resistant welding of the stainless steel pipeline according to claim 1, 2, 3 or 5, wherein an air inlet valve is further arranged on the argon gas filling pipe.

Technical Field

The invention relates to an anti-oxidation welding method for a stainless steel pipeline.

Background

During the welding process of the stainless steel pipeline, the stainless steel pipeline to be welded is usually directly welded indoors and outdoors, and oxygen contained in the air can oxidize the stainless steel pipeline to be welded during the welding process, thereby seriously affecting the welding quality of the pipeline. Therefore, an anti-oxidation welding method for stainless steel pipelines is needed.

Disclosure of Invention

The invention aims to provide an anti-oxidation welding method for stainless steel pipelines, which is helpful for preventing the stainless steel pipelines from being oxidized in the welding process.

The technical scheme of the invention is as follows: an anti-oxidation welding method for stainless steel pipelines comprises the following steps:

(1) placing two sections of stainless steel pipelines to be welded on a supporting and positioning table and enabling the two sections of stainless steel pipelines to be close to each other;

(2) plugging a first chock at the outer side end of one stainless steel pipeline to be welded, and plugging a second chock with an argon gas filling pipe at the outer side end of the other stainless steel pipeline to be welded;

(3) adhering high-temperature adhesive tapes to the adjacent end parts of the two stainless steel pipelines to be welded, and arranging exhaust holes on the high-temperature adhesive tapes;

(4) communicating an argon gas filling pipe with an argon gas tank, and continuously introducing argon gas into a stainless steel pipeline to be welded through the argon gas filling pipe;

(5) after the air in the pipeline to be welded is exhausted, tearing a gap of the high-temperature adhesive tape from the lower end of the welding line to be welded, starting welding, and tearing off the high-temperature adhesive tape while welding until the end part connected with the pipeline is completely welded;

(6) and after the bottoming of the welding is finished, stopping argon filling or continuously introducing argon at a small flow rate, and pulling out the first chock and the second chock after the welding of the whole welding seam is finished.

Further, the supporting and positioning table comprises a supporting seat, a pair of fixing plates is transversely arranged at the upper end of the supporting seat in parallel, and convex edges protruding upwards and used for limiting the pipeline to be welded are arranged on the outer side edges of the fixing plates respectively.

Furthermore, the supporting seat is a supporting pipe fitting which is vertically arranged, and the fixing plates are angle irons respectively.

Furthermore, the first chock block and the second chock block respectively comprise a sponge block for plugging a pipeline to be welded, and a sealing plate for sealing the outer side end of the pipeline to be welded is connected to the outer side surface of the sponge block.

Furthermore, the argon gas inflation tube sequentially passes through the sealing plate and the sponge block of the second chock block and extends into another stainless steel pipeline to be welded.

Furthermore, an air inlet valve is also arranged on the argon gas inflation tube.

Compared with the prior art, the invention has the following advantages: the stainless steel pipeline anti-oxidation welding method is simple and rapid, and is beneficial to preventing the stainless steel pipeline from being oxidized in the welding process; meanwhile, the operation and the use are convenient, and the rapid assembly and the use on a welding site are convenient; the device for auxiliary welding has the advantages of simple and convenient material acquisition, low cost and effective reduction of welding cost.

Drawings

FIG. 1 is a schematic view of an auxiliary welding apparatus according to the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1 of the present invention;

in the figure: 1-a pipeline to be welded 10-a support seat 11-a fixed plate 20-a first chock 21-a second chock 22-a sponge block 23-a closing plate 24-an argon gas filling tube 30-a high-temperature adhesive tape 31-an exhaust hole.

Detailed Description

In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.

Refer to FIGS. 1 and 2

An anti-oxidation welding method for stainless steel pipelines comprises the following steps:

(1) placing two sections of stainless steel pipelines 1 to be welded on a supporting and positioning table and enabling the two sections of stainless steel pipelines to be close to each other;

(2) a first chock block 20 is plugged at the outer side end of one stainless steel pipeline to be welded, and a second chock block 21 with an argon gas filling pipe 24 is plugged at the outer side end of the other stainless steel pipeline to be welded;

(3) the method comprises the following steps of (1) attaching a high-temperature adhesive tape 30 to the adjacent end parts of two stainless steel pipelines to be welded, and arranging an exhaust hole 31 on the high-temperature adhesive tape, wherein the length of the exhaust hole is 2 ~ 4 cm;

(4) communicating an argon gas filling pipe with an argon gas tank, and continuously introducing argon gas into a stainless steel pipeline to be welded through the argon gas filling pipe;

(5) and continuously introducing argon for 1min, tearing a notch of the high-temperature adhesive tape from the lower end of the welding line to be welded after the air in the pipeline to be welded is discharged, starting welding, tearing off the high-temperature adhesive tape while welding until the end part connected with the connecting pipeline is completely welded, and continuously introducing argon in the welding process.

(6) And after the bottoming of the welding is finished, stopping argon filling or continuously introducing argon at a small flow rate according to specific conditions, and pulling out the first chock and the second chock after the welding of the whole welding seam is finished.

In this embodiment, the supporting and positioning table includes a supporting seat 10, the upper end of the supporting seat is transversely provided with a pair of fixing plates 11 in parallel, and the outer side edges of the fixing plates are respectively provided with a convex edge which protrudes upwards and is used for limiting the pipeline to be welded, so that the pipeline is prevented from rolling.

In this embodiment, in order to reduce the cost and facilitate material taking, the support seat is a support pipe member arranged in a vertical manner, and the fixing plates are angle irons respectively.

In this embodiment, for better shutoff stainless steel pipe, first chock and second chock are respectively including being used for stuffing in the sponge piece 22 of treating the welded pipe, be connected with the closing cap on the lateral surface of sponge piece and treating the shrouding 23 of welded pipe outside end to through the shrouding, fine prevention gas leakage. The sponge block is the same as the inner ring of the stainless steel pipeline in shape, and the diameter of the sponge block is slightly larger than the inner diameter of the stainless steel pipeline.

In this embodiment, the argon gas-filled tube sequentially passes through the closing plate and the sponge block of the second chock block and extends into another stainless steel pipeline to be welded, so as to better fill gas into the stainless steel pipeline.

In this embodiment, an air inlet valve is further arranged on the argon gas filling pipe so as to control the on-off of argon gas.

The above description is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various stainless steel pipe anti-oxidation welding methods can be designed without inventive labor based on the teachings of the present invention, and all equivalent changes, modifications, substitutions and alterations made without departing from the spirit and scope of the present invention as defined by the appended claims should fall within the scope of the present invention.