KR101851228B1 - Gas pocket for welding pipes - Google Patents

Gas pocket for welding pipes Download PDF

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Publication number
KR101851228B1
KR101851228B1 KR1020160172682A KR20160172682A KR101851228B1 KR 101851228 B1 KR101851228 B1 KR 101851228B1 KR 1020160172682 A KR1020160172682 A KR 1020160172682A KR 20160172682 A KR20160172682 A KR 20160172682A KR 101851228 B1 KR101851228 B1 KR 101851228B1
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KR
South Korea
Prior art keywords
pipe
welding
main body
gas
trailing
Prior art date
Application number
KR1020160172682A
Other languages
Korean (ko)
Inventor
신성식
Original Assignee
신성식
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Publication date
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Priority to KR1020160172682A priority Critical patent/KR101851228B1/en
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Publication of KR101851228B1 publication Critical patent/KR101851228B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/29—Supporting devices adapted for making use of shielding means
    • B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/32—Accessories
    • B23K9/325—Devices for supplying or evacuating shielding gas

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

In the present invention, a plurality of trailing rings are connected to each other so as to spray gas to a welding portion so as to surround an outer circumferential surface of the pipe, thereby preventing discoloration and oxidation caused by air infiltration during welding, Provide a gas pocket for welding. According to the present invention, a plurality of trailing rings are connected to each other through a connecting member, so that welding is possible irrespective of the diameter of the pipe to be welded. In addition, since the mounting hole of the main body can be adjusted according to the welding torch, the welding can be performed regardless of the size of the welding torch.

Description

[0001] Gas pocket for welding pipes [0002]

The present invention relates to a gas pocket for pipe welding, and more particularly, to a gas pocket for welding a pipe, in which a plurality of trailing rings are connected to surround a peripheral surface of a pipe so as to inject gas to a welding portion, And to improve the quality of welding by preventing oxidation.

In general, argon gas is an inert gas that does not react with other materials and argon welding is used as a welding method of non-ferrous metals such as stainless steel and aluminum, because argon gas acts as a shielding film to prevent oxidation of metal during welding. It is mainly used for work requiring precise welding because of less welding deformation, less spatter and excellent welding quality.

However, since argon welding by general manual method takes a lot of time compared to other welding work, the operator may suffocate when exposed to argon gas for a long time. Even if the work surface is worn in a narrow place, There is a possibility that an operator may be damaged by the welding fumes generated by the diffusion of the molten metal vapor around by the arc generated heat of the arc.

In addition, the quality of the welding operation as described above is greatly influenced by external influences, and the most important thing is the flow of air. Work in a work environment where the air flow is heavy, if a little wind is blown in the work, bubbles will be formed in the welded product, which causes the argon gas to block the air between the welding material and the welding fire. However, If the air penetrates through, it may cause a problem in the quality of the welding due to the micropore.

In order to solve this problem, there has been proposed a technique for preventing oxidation by injecting a gas to a welding portion during welding. Japanese Utility Model Registration Registration No. 20-0411329 entitled " Guide for Argon Welding of Pipe Member " , Patent Registration No. 10-0956734, "Pipeline Automatic Welding Device Using Split Type Guide", Patent Document 3, Korean Patent Laid-Open No. 10-2013-0070984, "Pipe Welding Shielding jig "has been proposed.

However, since the above-described conventional techniques are constructed to be mounted on one pipe to be welded, there is a problem in that, when the diameter of the pipe is changed, the pipe must be separately fabricated again.

Patent Document 1: Korean Utility Model Registration Registration No. 20-0411329 entitled "Guide for Argon Welding of Pipe Member" Patent Document 2: Registered Patent Registration No. 10-0956734 "Automatic Pipeline Welding Device Using Split Guide" Patent Document 3: Korean Patent Laid-Open Publication No. 10-2013-0070984 "Shielding Jig for Pipe Welding"

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the problems of the prior art, and it is an object of the present invention to provide a welding apparatus and a welding method for welding a welded portion by arranging a plurality of trailing rings so as to surround a periphery of the pipe, And to provide a gas pocket for welding a new type of pipe which can prevent oxidation and improve welding quality.

Particularly, it is another object of the present invention to provide a new type of gas pocket for welding a pipe, in which a plurality of trailing rings are connected through a connecting member so that welding is possible irrespective of the diameter of the pipe to be welded.

It is another object of the present invention to provide a new type of gas pocket for welding a pipe which can be welded regardless of the size of the welding torch by configuring the mounting hole of the main body so as to be adjustable according to the welding torch.

According to an aspect of the present invention for achieving the above object, there is provided a welding apparatus including a main body (20) mounted on an outer circumferential surface of a pipe (100) to be welded and equipped with a welding torch (200) for welding the pipe ; A plurality of trailing rings (30) connected to one side of the main body (20) so as to surround the outer circumferential surface of the pipe (100) and spraying gas to a welded portion of the pipe (100); A connecting member 40 for connecting the body 20 with the trailing ring 30 and the plurality of trailing rings 30; And a fastening member 50 for fastening the plurality of trailing rings 30 to the connecting member 40. The trailing ring 30 is connected to the body 100 in accordance with the diameter of the pipe 100, The angle of the connecting member 40 connected to the main body 20 is adjusted and connected to the main body 20 so as to surround the outer circumferential surface of the pipe 100.

In the gas pocket for pipe welding according to the present invention, the main body 20 is opened at its lower portion and includes an inner space 26 including a front surface 21, a rear surface 22, a side surface 23 and an upper surface 24, And a mounting hole 27 in which the welding torch 200 is mounted is formed on the upper surface 24. The inner space 26 is divided by the partition 28, And a lower surface 25 extending from the lower end of the rear surface 22 to the rear surface 22 to form a closed space 29. [

In the gas pocket for pipe welding according to the present invention, a nozzle mounting hole 241 is formed on an upper surface 24 of the main body 20 to form a closed space 29, in which the gas injection nozzle 300 is mounted, The injection hole 251 is formed in the lower surface 25 so that the gas injected through the gas injection nozzle 300 is injected into the welded portion of the pipe 100.

In the gas pocket for pipe welding according to the present invention, the mounting hole 27 of the main body 20 can be adjusted according to the size of the welding torch 200.

In the gas pocket for pipe welding according to the present invention, the trailing ring 30 includes the front surface 31, the rear surface 32, the side surface 33, the upper surface 34 and the lower surface 35, And a nozzle mounting hole 341 for mounting a gas injection nozzle 300 for injecting gas to the welded portion of the pipe 100 is formed on the upper surface 34. The lower surface of the gas injection nozzle 34 The injection hole 351 is formed so that the gas injected through the injection hole 300 is injected into the welding portion of the pipe 100.

In the gas pocket for pipe welding according to the present invention, the side surfaces 23 and 33 of the main body 20 and the trailing ring 30 are fastened to the fastening hole 50 so that the connecting member 40 is fastened by the fastening member 50 231 and 331 are formed on the main body 20 and the fastening member 50. The fastening member 50 is composed of a bolt 51 and a nut 52. The nut 52 is fastened to the fastening holes 231 , 331) of the body (20) and the inner space of the trailing ring (30).

As described above, according to the gas pocket for pipe welding according to the present invention, by arranging a plurality of trailing rings to surround the outer circumferential surface of the pipe so as to inject gas to the welded portion, discoloration and oxidation So that the welding quality can be improved.

In particular, it is possible to weld a plurality of trails through a connecting member, regardless of the diameter of the pipe to be welded.

In addition, since the mounting hole of the main body can be adjusted according to the welding torch, the welding can be performed regardless of the size of the welding torch.

1 is a perspective view of a gas pocket for pipe welding according to a preferred embodiment of the present invention,
2 is an exploded perspective view of a gas pocket for pipe welding according to a preferred embodiment of the present invention,
3 is a view showing a main body in a gas pocket for pipe welding according to a preferred embodiment of the present invention,
Figure 4 shows a trailing ring in a gas pocket for pipe welding according to a preferred embodiment of the present invention,
FIGS. 5 and 6 are views showing a use state of a gas pocket for pipe welding according to a preferred embodiment of the present invention;
FIG. 7 is a photograph showing a portion welded using a gas pocket for pipe welding and a portion welded using a conventional gas pocket according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In FIGS. 1 to 7, the same reference numerals are assigned to components performing the same function. In the drawings and the detailed description, detailed description of specific elements and functions of elements not directly related to the technical features of the present invention will be omitted. .

1 to 6, a gas pocket 10 for pipe welding according to a preferred embodiment of the present invention includes a main body 20, a trailing ring 30, a connecting member 40, and a fastening member 50 .

The main body 20 is disposed on the outer circumferential surface of the pipe 100 to be welded and is equipped with a welding torch 200 for welding the pipe 100. The welding torch 200 is open at the bottom, A mounting hole 27 in which the welding torch 200 is mounted on the upper surface 24 is formed in the shape of a box having an inner space 26 including a side surface 23 and an upper surface 24, 26 have a bottom surface 25 which is divided by a partition wall 28 and extends from the lower end of the partition wall 28 to the rear surface 22 to form a closed space 29.

A nozzle mounting hole 241 is formed in the upper surface 24 of the main body 20 so that the gas injection nozzle 300 is mounted on the upper surface 24 of the main body 20. The lower surface 25 is provided with a gas injection nozzle 300 An injection hole 251 is formed so that the gas to be injected is injected into the welded portion of the pipe 100.

The mounting hole 27 of the main body 20 is formed to be adjustable according to the size of the welding torch 200. That is, the mounting hole 27 is formed so as to communicate with the inner space 26, and a fastening hole 271 is formed on the outer peripheral surface of the protruded portion by bolts and nuts. Therefore, when the diameter of the protrusion is adjusted according to the size of the welding torch 200, the welding torch 200 can be stably fixed by the fastener 271 when the welding torch 200 is mounted.

The mounting hole 27 of the main body 20 can be adjusted in accordance with the size of the welding torch 200 so that the welding can be performed irrespective of the size of the welding torch 200, So that discoloration and oxidation due to air infiltration during welding can be prevented.

The trailing ring 30 is connected to one side of the main body 20 so as to surround the outer circumferential surface of the pipe 100 and is provided for spraying gas to the welded portion of the pipe 100.

The trailing ring 30 has a closed interior space including a front surface 31, a rear surface 32, a side surface 33, an upper surface 34 and a lower surface 35, A nozzle mounting hole 341 for mounting a gas injection nozzle 300 for injecting a gas to the welding portion is formed and a gas injected through the gas injection nozzle 300 is welded to the lower surface 35 of the pipe 100 The spray hole 351 is formed so as to be sprayed to the portion.

The connecting member 40 is for connecting the main body 20, the trailing ring 30 and the plurality of trailing rings 30 to each other. The connecting member 40 is formed in a flat plate shape and has a fastening hole 41 formed on both sides thereof.

The fastening member 50 is constituted by a bolt 51 and a nut 52 for fastening the connecting member 40 to the main body 20 and a plurality of trailing rings 30.

On the other hand, the side surfaces 23 and 33 of the main body 20 and the trailing ring 30 are formed with fastening holes 231 and 331 so that the connecting member 40 is fastened by the fastening member 50, The nut 52 of the trailing ring 30 is fixed to the inner space of the closed space 29 and the trailing ring 30 of the main body 20 so as to communicate with the coupling holes 231 and 331 of the main body 20 and the trailing ring 30 .

As described above, according to the gas pocket for pipe welding 10 according to the present invention, the outer circumferential surface of the pipe 100 is surrounded by a plurality of trailing rings 30 so as to inject gas to the welding portion, It is possible to prevent the discoloration and oxidation due to the infiltration of air and to improve the welding quality.

In particular, since the plurality of trailing rings 30 are connected through the connecting member 40, there is an effect that the welding can be performed irrespective of the diameter of the pipe 100 to be welded.

In addition, since the mounting hole 27 of the main body 20 is adjustable in accordance with the welding torch 200, welding is possible irrespective of the size of the welding torch 200.

FIGS. 5 and 6 are views showing a use state of the gas pocket for pipe welding according to a preferred embodiment of the present invention. FIG. 7 is a cross-sectional view of a portion welded using a gas pocket for pipe welding according to a preferred embodiment of the present invention. Fig. 6 is a photograph showing a portion of a welded portion using a conventional gas pocket; Fig.

5 to 7, after the welding torch 200 is mounted on the mounting hole 27 of the main body 20, the main body 20 is positioned on the upper portion of the welded portion of the pipe 100. Thereafter, the angle between the main body 20 and the connecting member 40 is adjusted to correspond to the outer peripheral surface of the pipe 100, and the trailing ring 30 is fixed via the engaging member 50. The welding torch 200 is welded along the welded portion of the pipe 100 when the trailing ring 30 is disposed to surround the outer circumferential surface of the pipe 100 by adjusting the connecting member 40. The gas injection nozzle 300). ≪ / RTI >

Although the gas pocket for pipe welding according to the preferred embodiment of the present invention as described above has been shown in accordance with the above description and drawings, it is merely an example of the present invention, and it is to be understood that various changes and modifications may be made without departing from the technical spirit of the present invention And modifications may be made by those skilled in the art.

10: Gas pocket for pipe welding
20: main body 21, 31: front
22, 32: rear surface 23, 33: side surface
24, 34: upper surface 25, 35: lower surface
26: inner space 27: mounting hole
28: partition wall 29: closed space
30: Trailing ring 40: Connecting member
50: fastening member 51: bolt
52: Nut
100: pipe 200: welding torch
300: Gas injection nozzle

Claims (6)

A main body 20 disposed on an outer circumferential surface of a pipe 100 to be welded and equipped with a welding torch 200 for welding the pipe 100;
A plurality of trailing rings (30) connected to one side of the main body (20) so as to surround the outer circumferential surface of the pipe (100) and spraying gas to a welded portion of the pipe (100);
A connecting member 40 for connecting the body 20 with the trailing ring 30 and the plurality of trailing rings 30;
The connecting member 40, the main body 20, and the fastening member 50 for fastening the plurality of trailing rings 30,
The angle of the connecting member 40 connected to the main body 20 is adjusted according to the diameter of the pipe 100 to cover the outer circumferential surface of the pipe 100, Wherein said gasket is connected to said gas pocket.
The method according to claim 1,
The main body 20 has a box shape having an open bottom and an inner space 26 including a front surface 21, a rear surface 22, a side surface 23 and an upper surface 24, A mounting hole 27 in which the welding torch 200 is mounted is formed and the inner space 26 is divided by the partition 28 and extends from the lower end of the partition 28 to the rear surface 22, (25) for forming a gasket (29).
3. The method of claim 2,
A nozzle mounting hole 241 is formed on an upper surface 24 of the main body 20 so that the gas injection nozzle 300 is mounted on the upper surface 24 of the main body 20. The gas injection nozzle 300 is formed on the lower surface 25, Wherein a spray hole (251) is formed in such a manner that a gas sprayed through the pipe (100) is sprayed onto a welded portion of the pipe (100).
3. The method of claim 2,
Wherein the mounting hole (27) of the main body (20) is adjustable according to the size of the welding torch (200).
The method according to claim 1,
The trailing ring 30 has a closed inner space 36 including a front surface 31, a rear surface 32, a side surface 33, an upper surface 34 and a lower surface 35, A nozzle mounting hole 341 in which a gas injection nozzle 300 for injecting gas is mounted is formed in a welding portion of the pipe 100 and a gas injected through the gas injection nozzle 300 is injected into the lower surface 35 Wherein an injection hole (351) is formed so as to be injected into a welded portion of the pipe (100).
6. The method according to any one of claims 2 to 5,
The side surfaces 23 and 33 of the body 20 and the trailing ring 30 are formed with fastening holes 231 and 331 so that the connecting member 40 is fastened by the fastening member 50,
The fastening member 50 is composed of a bolt 51 and a nut 52. The nut 52 is connected to the fastening holes 231 and 331 of the main body 20 and the trailing ring 30, Is fixed to the closed space (29) of the casing (20) and the internal space of the trailing ring (30).
KR1020160172682A 2016-12-16 2016-12-16 Gas pocket for welding pipes KR101851228B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200020096A (en) * 2018-08-16 2020-02-26 대우조선해양 주식회사 Trailing shield jig
CN110936072A (en) * 2019-12-12 2020-03-31 河北汉光重工有限责任公司 Modularized gas protection tool suitable for manual linear welding of titanium rectangular pipe
KR20200071515A (en) * 2018-12-11 2020-06-19 삼성중공업 주식회사 Apparatus for preventing an scattering of welding spatter
KR102357492B1 (en) * 2021-10-07 2022-02-08 노창식 zinc powder dust and fume collection and removal device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200411329Y1 (en) 2005-12-16 2006-03-15 (주)드리맥스 Guiding device for orbital tig welding
KR100956734B1 (en) 2007-12-21 2010-05-06 현대중공업 주식회사 Automatic welding device for pipe line using divided type guide
KR20130070984A (en) 2011-12-20 2013-06-28 현대중공업 주식회사 Shielding jig for pipe welding
KR20150004658U (en) * 2014-06-20 2015-12-31 대우조선해양 주식회사 Trailing shield jig

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200411329Y1 (en) 2005-12-16 2006-03-15 (주)드리맥스 Guiding device for orbital tig welding
KR100956734B1 (en) 2007-12-21 2010-05-06 현대중공업 주식회사 Automatic welding device for pipe line using divided type guide
KR20130070984A (en) 2011-12-20 2013-06-28 현대중공업 주식회사 Shielding jig for pipe welding
KR20150004658U (en) * 2014-06-20 2015-12-31 대우조선해양 주식회사 Trailing shield jig

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200020096A (en) * 2018-08-16 2020-02-26 대우조선해양 주식회사 Trailing shield jig
KR102533379B1 (en) * 2018-08-16 2023-05-19 대우조선해양 주식회사 Trailing shield jig
KR20200071515A (en) * 2018-12-11 2020-06-19 삼성중공업 주식회사 Apparatus for preventing an scattering of welding spatter
KR102357370B1 (en) 2018-12-11 2022-02-03 삼성중공업 주식회사 Apparatus for preventing an scattering of welding spatter
CN110936072A (en) * 2019-12-12 2020-03-31 河北汉光重工有限责任公司 Modularized gas protection tool suitable for manual linear welding of titanium rectangular pipe
KR102357492B1 (en) * 2021-10-07 2022-02-08 노창식 zinc powder dust and fume collection and removal device

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