CN109500475A - Pipeline argon arc welding welding Aerated tool equipment and pipeline argon gas welding method - Google Patents
Pipeline argon arc welding welding Aerated tool equipment and pipeline argon gas welding method Download PDFInfo
- Publication number
- CN109500475A CN109500475A CN201811287585.4A CN201811287585A CN109500475A CN 109500475 A CN109500475 A CN 109500475A CN 201811287585 A CN201811287585 A CN 201811287585A CN 109500475 A CN109500475 A CN 109500475A
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- China
- Prior art keywords
- pipeline
- argon gas
- section
- tool equipment
- welding
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Classifications
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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
-
- 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
The present invention provides a kind of pipeline docking argon arc welding welding Aerated tool equipment and welding method.The Aerated tool equipment includes two pipelines, and two pipelines dock and have weld seam at docking.Aerated tool equipment includes: argon gas conduit, including first segment, second segment, third section and the 4th section.Second segment and the 4th section of periphery have screw thread.Two nuts are separately mounted on second segment and the 4th section of screw thread.Two dog-ear plates are respectively sleeved in third section.Two backing plates are respectively sleeved in third section and are located between two dog-ear plates.Sealing material is located between two backing plates.It is mobile to third section direction by adjusting two nuts, sealing material is clamped between two backing plates, Aerated tool equipment is pulled in into the 4th section of close weld seam that corresponding pipeline makes argon gas conduit.Aerated tool equipment of the invention, which is realized, reduces inflationtime, reduces plenum space, and then reduce a large amount of wastes of argon gas resource.
Description
Technical field
The present invention relates to pipe fitting argon arc welding welding fields, are related specifically to a kind of inflation of stainless steel tube argon arc welding welding
Tooling.
Background technique
In the ship-related products undertaken the construction of at present, stainless steel tube butt weld quantity is more, and quality requirement is very high, generallys use
Argon arc welding welding.The characteristics of pipe argon arc welding welding, is, using argon gas protective gas, by air insulated except welding zone, makes pipe
Son welding outer surface forming is fine and close, without splash, it is high-quality, internal forming quality is guaranteed by pipe argon gas inside concentration.With
Method toward the inflation of pipe argon arc welding welding is in pipe two sides using the fabrics such as sponge, by end seals, then to whole root canal
Argon gas is filled in sub, after reaching concentration, starts to weld.This method has a drawback: when two pipe intersected docking, pipe
Sub- inner space is larger, and whole tube interior requires applying argon gas, will cause that inflationtime is longer and argon gas resource is largely unrestrained
Take.How reducing inflationtime and saving argon gas resource is a technical problem to be solved urgently.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of pipeline argon arc welding welding air charging system and pipeline argon gas
Welding method, solves in the prior art that the sub- applying argon gas of whole root canal causes inflationtime longer, and argon gas resource largely wastes
Problem.
One aspect of the present invention, a kind of pipeline docking argon arc welding welding Aerated tool equipment, including two pipelines, two institutes
It states pipeline docking and there is weld seam at docking, be configured with the Aerated tool equipment in each described pipeline.It is described to fill
Gas tooling includes: argon gas conduit, including first segment, second segment, third section and the 4th section, the second segment and 4th section described
Periphery has screw thread；Two nuts, be separately mounted on the screw thread of the second segment and the 4th section of the screw thread on；Two
Dog-ear plate is respectively sleeved in the third section；Two backing plates are respectively sleeved in the third section, and are located at two institutes
It states between dog-ear plate；And sealing material, it is set in the third section, and be located between two backing plates；It is described close
The length of closure material is between the first preset length and the second preset length；Wherein, by adjusting two nuts to described
Third section direction is mobile, and the sealing material is clamped between two backing plates, then pulls in the Aerated tool equipment pair
The pipeline answered, so that the close weld seam of described 4th section of the argon gas conduit.
According to an embodiment of the present invention, the dog-ear plate includes bottom plate and two side walls, and the shape of the bottom plate is
Rectangular or square, the shape of the both sides side wall is rectangular or square, and has circular hole, the circle among the bottom plate
The diameter in hole is equal to the outer diameter of the argon gas conduit.
According to an embodiment of the present invention, aperture, the inflation are all had on two side walls of the dog-ear plate
Tooling further includes chain, and the chain passes through two apertures, the Aerated tool equipment is pulled in the pipeline.
According to an embodiment of the present invention, the shape of the backing plate is annular, and the internal diameter of the backing plate is equal to the argon
The outer diameter of the outer diameter of airway and the backing plate is greater than the catercorner length of the bottom plate of the dog-ear plate and described
The outer diameter of sealing material is greater than the outer diameter of the backing plate.
According to an embodiment of the present invention, the first segment of the argon gas conduit includes multiple segments, those segments
Outer diameter be gradually incremented by along the direction of the second segment.
According to an embodiment of the present invention, the sealing material is sponge.
According to an embodiment of the present invention, the 4th section of the port of the argon gas pipeline and the weld seam away from
From for 500mm.
According to an embodiment of the present invention, the material of the pipeline and the argon gas conduit is stainless steel.
Another aspect of the present invention, a kind of pipeline argon gas welding method, including two pipelines, two inflators above-mentioned
Dress, the described method comprises the following steps: adjust two nuts to the movement of third section direction, by the sealing material feed collet
Tightly between two backing plates；The Aerated tool equipment is pulled into the pipeline from the end to be welded of pipeline by the chain,
So that the argon gas conduit is close to the end to be welded of the pipeline；The end to be welded for docking two pipelines, described in two
Weld seam is formed between the end to be welded of pipeline；And inflated by argon bottle into the argon gas pipeline, make a reservation for when argon gas reaches
After concentration, start to weld.
According to an embodiment of the present invention, the 4th section of the port of the argon gas pipeline and the weld seam away from
From for 500mm.
The invention has effective effect that: Aerated tool equipment is integrally made using stainless steel material, is avoided to stainless steel
The pollution and scuffing of inner wall of the pipe；Sealing material can be clamped by two annular backing plates；And it will by adjusting two nuts
Sealing material clamps.The outer diameter of multiple segments on the first segment of Aerated tool equipment is gradually increased, such as forge piece of step type structure, Ke Yiyu
The argon gas gas tube of different size is connected；The dog-ear plate of the Aerated tool equipment can be connect with chain, Aerated tool equipment can be pulled to pipe
In road and close to commissure, according to the length of pipeline, the length of appropriate adjustment chain.
Detailed description of the invention
Its example embodiment is described in detail by referring to accompanying drawing, above and other target of the invention, feature and advantage will
It becomes more fully apparent.
Fig. 1 shows the sectional view of the Aerated tool equipment of an example embodiment according to the present invention.
Fig. 2 is the sectional view of the argon gas conduit of Aerated tool equipment in Fig. 1.
Fig. 3 is the A-A sectional view of Fig. 1.
Fig. 4 is the B-B sectional view of Fig. 3.
Fig. 5 shows the sectional view of the pipeline docking with Aerated tool equipment of an example embodiment of the invention.
Specific embodiment
It is hereafter to cooperate appended attached drawing to elaborate for embodiment, but provided embodiment is not to limit this hair
Bright covered range, and the non-sequence to limit its execution of the description of structure operation, any knot reconfigured by element
Structure, it is produced that there is equal and other effects device, it is all the range that the present invention is covered.In addition, attached drawing is only for the purpose of description, and
It maps not according to full size.To make to be easy to understand, similar elements will be illustrated in following the description with identical symbology.
The term used in full piece specification and claims usually has each term in addition to having and especially indicating
Using in the content in this area, disclosed herein with the usual meaning in special content.Certain arts to describe this exposure
Language by it is lower or this specification other places discuss, it is additional in the description in relation to this exposure to provide those skilled in the art
Guidance.
The error or range for being commonly index value about " about " used herein, " about " or " substantially " are hundred
Within/bis- ten, preferably it is within 10, and is more preferably then within 5 percent.Herein as without specifically
It is bright, mentioned by numerical value all regard as approximation, such as can error or model as represented by " about ", " about " or " substantially "
It encloses or other approximations.
About " first " used herein, " second " ... etc., not especially censure the meaning of order or cis-position, also
The non-element described just for the sake of difference with same technique term limiting the present invention or operation.
Secondly, term "comprising", " comprising ", " having ", " containing " etc. used in herein, are open
Term, that is, mean including but not limited to.
The present embodiment provides a kind of pipeline argon arc welding welding Aerated tool equipments.As shown in Figure 1, Figure 2, Fig. 3, Fig. 4 and Fig. 5 institute
Show, the Aerated tool equipment, including two pipelines, two pipelines dock and have weld seam, each described pipeline at docking
Inside it is configured with the Aerated tool equipment.The Aerated tool equipment includes: argon gas conduit, including first segment, second segment, third section
With the 4th section, the first segment is connect by argon gas gas tube with argon bottle, and the second segment and the 4th section of the periphery are equal
With screw thread；Two nuts, be separately mounted on the screw thread of the second segment and the 4th section of the screw thread on；Two dog-ears
Plate is respectively sleeved in the third section；Two backing plates are respectively sleeved in the third section, and are located at two foldings
Between gusset；And sealing material, it is set in the third section, and be located between two backing plates；The sealing material
The length of material is between the first preset length and the second preset length；Wherein, by adjusting two nuts to the third
Duan Fangxiang is mobile, and the sealing material is clamped between two backing plates, is then pulled in the Aerated tool equipment corresponding
The pipeline, so that the close weld seam of described 4th section of the argon gas conduit.
Next the Aerated tool equipment of embodiment will be described in conjunction with specific example.
Fig. 1 shows the sectional view of the Aerated tool equipment of the present embodiment, and Fig. 2 is the sectional view of the argon gas conduit of Fig. 1, Fig. 3 Fig. 1
A-A sectional view, Fig. 4 is the B-B sectional view of Fig. 2, and Fig. 5 shows the section that the pipeline with Aerated tool equipment of the present embodiment docks
Figure.Aerated tool equipment includes argon gas conduit 10, and wherein argon gas conduit 10 has through-hole 106, in order to which argon gas is worn from the through-hole 106
It crosses.It is 4 sections that argon gas conduit 10, which divides, respectively first segment 104, second segment 103, third section 102 and the 4th section 101.First segment
101 include multiple segments, and the outer diameter of these segments is gradually incremented by along the direction of second segment 103, shows forge piece of step type structure.?
The argon gas gas tube 24 that the different segment of multiple outer diameters is suitable for connecting different dimensions is set on first segment 104, and is passed through
Argon gas gas tube 24 is connect with argon bottle 23.The second segment 103 of argon gas conduit 10 and the 4th section of 101 peripheries have screw thread.Two
A nut 14 is respectively arranged on the screw thread of second segment 103 and on the 4th section 101 of screw thread, and nut 14 can be in second segment 103
On length direction along screw thread in argon gas conduit move back and forth, nut 14 can also on the 4th section 101 along screw thread in argon
The length direction of airway moves back and forth.Dog-ear plate 11 and two backing plates there are two being arranged in the third section 102 of argon gas conduit 10
12, two backing plates 12 are located between two dog-ear plates 11.Sealing material 13, such as sponge are sheathed on the third of argon gas conduit 10
In section 102 and it is located between two backing plates 12.Sealing material 13 is cylindrical body, and the inside of sealing material 13 has through-hole.Pad
Plate 12 is annular.The bottom plate of the dog-ear plate 11 is rectangular or square, and the center of the bottom plate is opened up by circular hole, the dog-ear
Plate 11 has two side walls, is connected respectively with two relative edges of the bottom plate of dog-ear plate 11.The diameter of the through-hole of sealing material 13,
The Circularhole diameter of the bottom plate of the internal diameter and dog-ear plate 11 of backing plate 12 is equal to the outer diameter of argon gas conduit 10.The outer diameter of sealing material 13
Greater than the outer diameter of backing plate 12, and the outer diameter of sealing material 13 is equal to the internal diameter of pipeline 3,4.The outer diameter of backing plate 12 is greater than dog-ear plate
Cornerwise length of 11 bottom plate.The length of sealing material 13 is more than or equal to the first preset length L1 and is less than or equal to second
Preset length L2.First preset length L1 can be with for the length of the third section 102 of argon gas conduit 10, the second preset length L2
The length for subtracting two nuts with the 4th section 101 of the distance between end for the end of second segment 103 of argon gas conduit 10 obtains
The difference obtained.By adjusting two nuts 4, so that two nuts 14 are mobile towards the direction of the third section of argon gas conduit 10,
To clamp dog-ear plate 11, backing plate 12 and sealing material 13.
In the present embodiment, circular hole 110 is offered in the two side walls of dog-ear plate 11, chain 22 can be from two circles
It is passed through inside hole 110, and the diameter of chain is less than the diameter of circular hole 110.
In the present embodiment, the peace of Aerated tool equipment is completed to pinch seal material 13 by adjusting two nuts 14
Dress.Two circular holes 110 that chain 22 is passed through to dog-ear plate 11, Aerated tool equipment is pulled in pipeline 3, so that the of argon gas conduit 10
Four section of 101 end to be welded close to pipeline 3.Likewise, chain 22 to be passed through to two circular holes 110 of dog-ear plate 11, by inflator
Dress pulls in pipeline 4, so that the 4th section of 101 end to be welded close to pipeline 4 of argon gas conduit 10.Pipeline 3 and pipeline 4 dock,
Weld seam 21 is formed between the end to be welded of pipeline 3 and the end to be welded of pipeline 4.Argon gas conduit 10 close to weld seam 21 end face with
The distance between weld seam 21 is 500mm, reduces the space of inflation, reduces inflationtime, and then reduce the waste of argon gas resource.
In the present embodiment, the length of chain 22 can be adjusted according to the length of pipeline, be drawn convenient for Aerated tool equipment
Enter inside pipeline.
In the present embodiment, the material of pipeline 3,4 and argon gas conduit 10 is stainless steel.
The present invention provides a kind of pipeline argon gas welding method.Sealing material 13 is inserted in the third section 102 of argon gas conduit 10
On, two backing plates 12 are inserted in the third section 102 of argon gas conduit 10 to and are located at the outside of sealing material, then by two dog-ears
Plate 11 is inserted in the outside in the third section 102 of argon gas conduit 10 and being located at two backing plates 12, then distinguishes two nuts 14
Be installed on the screw thread of the second segment 103 of argon gas conduit 10 and the screw thread of first segment 101 on.By adjusting two nuts 14 for two
11, two backing plates 12 of a dog-ear plate and sealing material 11 clamp, to complete the installation of Aerated tool equipment, then close to first segment
Chain 22 is penetrated in the circular hole 110 of the two side walls of 104 dog-ear plate 11, is pulled Aerated tool equipment inside pipeline by chain 22
And making the distance between the 4th section 101 of end face of argon gas conduit 10 and the end to be welded of pipeline W is about 500m, by two
Pipeline docks, and weld seam 21 is formed between the end to be welded of two pipelines.The first segment 104 of argon gas conduit 10 passes through argon gas gas tube
24 are connected with argon bottle 23, export argon gas to the space of each 500mm in weld seam two sides, when the argon gas in the space reaches by argon bottle 23
To after predetermined concentration, start to weld, reaches and save argon gas resource, reduce the purpose of cost.
In the present embodiment, the argon gas conduit 10 of the Aerated tool equipment in only one pipeline is connected by argon gas gas tube 24
The argon gas conduit 10 of argon bottle 23, the Aerated tool equipment in another pipeline is not connected with argon bottle.In other embodiments, two pipes
The argon gas conduit 10 of Aerated tool equipment in road connects argon bottle 23 by argon gas gas tube 24, is given simultaneously by two argon bottles 23
The space of each 500mm in weld seam two sides is inflated, so that inflationtime further shortens.
In conclusion Aerated tool equipment is integrally made using stainless steel material, avoid to stainless steel pipes inner wall
Pollution and scuffing；Sealing material can be clamped by two annular backing plates；And by adjusting two nuts by sealing material feed collet
Tightly.The outer diameter of multiple segments on the first segment of Aerated tool equipment is gradually increased, such as forge piece of step type structure, can be with different size
Argon gas gas tube is connected；The dog-ear plate of the Aerated tool equipment can be connect with chain, can be pulled to Aerated tool equipment in pipeline and close
Commissure, according to the length of pipeline, the length of appropriate adjustment chain.
It should be noted that mentioned step can be according to reality in addition to especially chatting its bright sequence person in the aforementioned embodiment
It applies and needs to adjust its tandem, or even can simultaneously or partially be performed simultaneously, aforementioned is only an embodiment, is not limited to this
Invention.
Although the present invention is disclosed above with embodiment, however, it is not to limit the invention, and any this field tool is usual
Skill, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, therefore protection model of the invention
It encloses subject to the view scope of which is defined in the appended claims.
Claims (10)
1. a kind of pipeline docks argon arc welding welding Aerated tool equipment, including two pipelines, two pipelines are docked and are being docked
Place has weld seam, is configured with the Aerated tool equipment in each described pipeline, which is characterized in that the Aerated tool equipment packet
It includes:
Argon gas conduit, including first segment, second segment, third section and the 4th section, the second segment and the 4th section of the periphery are equal
With screw thread；
Two nuts, be separately mounted on the screw thread of the second segment and the 4th section of the screw thread on；
Two dog-ear plates are respectively sleeved in the third section；
Two backing plates are respectively sleeved in the third section, and are located between two dog-ear plates；And
Sealing material is set in the third section, and is located between two backing plates；The length of the sealing material exists
Between first preset length and the second preset length；
Wherein, mobile to third section direction by adjusting two nuts, the sealing material is clamped in two institutes
It states between backing plate, the Aerated tool equipment is then pulled in into the corresponding pipeline, so that described 4th section of the argon gas conduit
Close to the weld seam.
2. pipeline docking argon arc welding welding Aerated tool equipment according to claim 1, which is characterized in that the dog-ear plate
Including bottom plate and two side walls, the shape of the bottom plate is rectangular or square, and the shape of the both sides side wall is for rectangle or just
It is rectangular, and there is circular hole among the bottom plate, the diameter of the circular hole is equal to the outer diameter of the argon gas conduit.
3. pipeline docking argon arc welding welding Aerated tool equipment according to claim 2, which is characterized in that the dog-ear plate
Two side walls on all have aperture, the Aerated tool equipment further includes chain, the chain pass through two apertures, use
The Aerated tool equipment is pulled in the pipeline.
4. pipeline docking argon arc welding welding Aerated tool equipment according to claim 2, which is characterized in that the shape of the backing plate
Shape is annular, and the outer diameter of outer diameter and the backing plate that the internal diameter of the backing plate is equal to the argon gas conduit is greater than the folding
The catercorner length of the bottom plate of gusset and the outer diameter of the sealing material are greater than the outer diameter of the backing plate.
5. pipeline docking argon arc welding welding Aerated tool equipment according to claim 1, which is characterized in that the argon gas conduit
The first segment include multiple segments, the outer diameter of those segments is gradually incremented by along the direction of the second segment.
6. pipeline docking argon arc welding welding Aerated tool equipment according to claim 1, which is characterized in that the sealing material
For sponge.
7. pipeline docking argon arc welding welding Aerated tool equipment according to claim 1, which is characterized in that the argon gas pipeline
The 4th section of the port at a distance from the weld seam be 500mm.
8. pipeline docking argon arc welding welding Aerated tool equipment according to claim 1, which is characterized in that the pipeline and institute
The material for stating argon gas conduit is stainless steel.
9. a kind of pipeline argon gas welding method, including two pipelines, two Aerated tool equipments according to claims 1-8, institute
State method the following steps are included:
It is mobile to third section direction to adjust two nuts, by the sealing material be clamped in two backing plates it
Between；
The Aerated tool equipment is pulled into the pipeline from the end to be welded of pipeline by the chain, so that the argon gas conduit leans on
The end to be welded of the nearly pipeline；
The end to be welded for docking two pipelines, forms weld seam between the end to be welded of two pipelines；And
It is inflated by argon bottle into the argon gas pipeline, after argon gas reaches predetermined concentration, starts to weld.
10. pipeline argon gas welding method as claimed in claim 9, which is characterized in that the 4th section of the argon gas conduit
Port is 500mm at a distance from the weld seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811287585.4A CN109500475A (en) | 2018-10-31 | 2018-10-31 | Pipeline argon arc welding welding Aerated tool equipment and pipeline argon gas welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811287585.4A CN109500475A (en) | 2018-10-31 | 2018-10-31 | Pipeline argon arc welding welding Aerated tool equipment and pipeline argon gas welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109500475A true CN109500475A (en) | 2019-03-22 |
Family
ID=65747263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811287585.4A Pending CN109500475A (en) | 2018-10-31 | 2018-10-31 | Pipeline argon arc welding welding Aerated tool equipment and pipeline argon gas welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109500475A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3095844A (en) * | 1958-07-24 | 1963-07-02 | Grinnell Corp | Inert gas sealer |
| CN2796928Y (en) * | 2005-06-27 | 2006-07-19 | 四川石油管理局 | Argon gas filling protection device for biphase stainless steel pipe line welding |
| KR20120004547U (en) * | 2010-12-16 | 2012-06-26 | 현대중공업 주식회사 | Jig for argon gas purge |
| CN105057860A (en) * | 2015-08-17 | 2015-11-18 | 中国能源建设集团山西电力建设有限公司 | Welding groove argon filling device |
| CN105618901A (en) * | 2016-03-02 | 2016-06-01 | 平高集团有限公司 | Left baffle for pipeline welding and gas protection device and welding tool |
| CN205393745U (en) * | 2016-02-03 | 2016-07-27 | 西安泰普特种焊接技术有限公司 | Simple and easy gas dam of pipeline welding seam back of body protection device |
| CN207188976U (en) * | 2017-09-04 | 2018-04-06 | 中国电建集团贵州工程公司 | A kind of gas shielded arc welding inflates leak-proof device |
| CN108406060A (en) * | 2018-04-16 | 2018-08-17 | 上海山安建设工程有限公司 | The stainless tube welding method of back side argon-filled protection |
-
2018
- 2018-10-31 CN CN201811287585.4A patent/CN109500475A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3095844A (en) * | 1958-07-24 | 1963-07-02 | Grinnell Corp | Inert gas sealer |
| CN2796928Y (en) * | 2005-06-27 | 2006-07-19 | 四川石油管理局 | Argon gas filling protection device for biphase stainless steel pipe line welding |
| KR20120004547U (en) * | 2010-12-16 | 2012-06-26 | 현대중공업 주식회사 | Jig for argon gas purge |
| CN105057860A (en) * | 2015-08-17 | 2015-11-18 | 中国能源建设集团山西电力建设有限公司 | Welding groove argon filling device |
| CN205393745U (en) * | 2016-02-03 | 2016-07-27 | 西安泰普特种焊接技术有限公司 | Simple and easy gas dam of pipeline welding seam back of body protection device |
| CN105618901A (en) * | 2016-03-02 | 2016-06-01 | 平高集团有限公司 | Left baffle for pipeline welding and gas protection device and welding tool |
| CN207188976U (en) * | 2017-09-04 | 2018-04-06 | 中国电建集团贵州工程公司 | A kind of gas shielded arc welding inflates leak-proof device |
| CN108406060A (en) * | 2018-04-16 | 2018-08-17 | 上海山安建设工程有限公司 | The stainless tube welding method of back side argon-filled protection |
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Application publication date: 20190322 |