CN106944776A - A kind of plugging device for welded pipe line internal protection gas - Google Patents
A kind of plugging device for welded pipe line internal protection gas Download PDFInfo
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- CN106944776A CN106944776A CN201710334982.1A CN201710334982A CN106944776A CN 106944776 A CN106944776 A CN 106944776A CN 201710334982 A CN201710334982 A CN 201710334982A CN 106944776 A CN106944776 A CN 106944776A
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- air bag
- plugging device
- preceding air
- rear gasbag
- pipeline
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a kind of plugging device for welded pipe line internal protection gas, the interior inflation plugging device is collectively constituted including snap joint with preceding air bag, built-in flexible pipe, air sifter, quick ball valve, pressure-reducing valve, protective case and rear gasbag.One end of the preceding air bag is provided with two groups of valves, and the other end of preceding air bag is provided with one group of valve and air sifter.With flexible multi-purpose：Different degrees of air bag swell increment can be used for the pipeline of a variety of inside diameter ranges, and the tracheae of flexible connection can be applied to a variety of space structures；Cost efficiency：Airtight cavity only is formed in the regional area of weld seam both sides, plenum space can be reduced, argon gas is saved, shortens air time swap；Lift quality：Airtight cavity is small, and purity inert gas is high, lifts back weld corrosion resistance；It is finished and tears open, pipe surface is pollution-free；It is easy to maintenance：Modularization, the design of interchangeable component, are easily installed, can independently change.
Description
Technical field
The present invention relates to pipeline welding technical field, specially a kind of closure for welded pipe line internal protection gas is filled
Put.
Background technology
With stainless steel, non-ferrous metal pipe in the industries such as petroleum equipment, petrochemical equipment, ocean platform it is increasing
Using work unit prevents the attention degree more and more higher of high-temperature oxydation to pipe welding seam back.Stainless steel, non-ferrous metal pipe
Weld job typically more uses argon tungsten-arc welding construction technology, and the molten bath of process formation and heat affected area temperature are high, hold
Easily important element in metal is aoxidized, needs to use inert gas to completely cut off weld seam front and back of weld in welding process
Air conservation.Gas jets are protected equipped with inertia on the welding gun that argon tungsten-arc welding is used, welding equipment provides inertia protection gas conveying
The front of pipeline and the magnetic valve for controlling break-make, molten bath and heat affected area can obtain effectively completely cutting off air conservation.Pipeline
Inside needs to fill the sufficiently high inert gas of concentration, the oxygen of back weld seam is displaced, with the back to molten bath and heat affected area
Carry out isolation air conservation.
Inert gas closure typically there are into three kinds of methods at weld seam back in current industry：A kind of way is incited somebody to action using adhesive tape
Pipeline two ends are blocked, and the inert gas filling pipe of one end connection wherein, the other end stamps passage, passes through certain time
Metathesis, certain limit is reduced to by the oxygen concentration in pipeline, and reaching prevents the purpose of back weld seam oxidation.Large Diameter Pipeline, length
During pipeline welding, this method is big due to plenum space, causes the waste for the time swap and inert protective gas grown very much.It is another
Kind of way is that close rubber closure plate of fit with inner-walls of duct is filled at away from weld seam both sides certain position, small-sized closed of formation
Cavity, time swap and the consumption of inert protective gas can be reduced to a certain extent.But for the pipeline of plurality of specifications
System is, it is necessary to which the rubber closure plate and postwelding that make all kinds of specifications take out more difficult.Still an alternative is that in weld seam both sides one
The scraps of paper that stickup can be completely soluble at set a distance, are pasted onto inner-walls of duct after scraps of paper immersion, form airtight chamber, be filled with
The effect of displacement isolating oxygen is reached after inert gas.This method needs to spend the more time to carry out the water soluble paper by pipeline specifications
Cut and install, postwelding needs to carry out pipeline the bath removal water soluble paper, is not suitable for the higher pipeline of purity requirements.This
Outside, the cost of manufacture of the water soluble paper is higher, adds product integral manufacturing cost.
How to make in a kind of pipe based on balloon inflation dilating principle and inflate plugging device, to realize different size, no
Plugging device is carried out to filling inert gas in pipeline during the pipeline welding of isospace structure, raising weld job can be reached
Efficiency, reduces the purpose of production cost.
The content of the invention
It is an object of the invention to provide a kind of plugging device for welded pipe line internal protection gas, with simple height
The purpose of back filling inert gas closure when realizing different size, the welding of different spaces structural pipeline of effect, and pass through reduction
Closed cavity space and reduction inert gas replacement time, weld job efficiency and reduction production totle drilling cost advantage are improved,
The problem of solving in existing pipeline welding on inert gas plugging device.
To achieve the above object, the present invention provides following technical scheme：It is a kind of for welded pipe line internal protection gas
Plugging device, the interior inflation plugging device includes snap joint and preceding air bag, built-in flexible pipe, air sifter, quick ball valve, decompression
Valve, protective case and rear gasbag are collectively constituted.One end of the preceding air bag is provided with two groups of valves, and is set in the other end of preceding air bag
It is equipped with one group of valve and air sifter.The valve that one end of the rear gasbag is provided with one group of valve, and rear gasbag is soft by rubber
Pipe sets one group of valve to be connected with the preceding air bag other end.The preceding air bag is separately positioned in two groups of pipelines with rear gasbag
At weld bond in the inwall of the left and right sides, and it is connected between preceding air bag and rear gasbag by rubber hose.Set in the preceding air bag
Built-in flexible pipe is equipped with, and built-in flexible pipe is connected with one group of suction nozzle that described preceding gasbag ektexine one end is set, it is described built-in soft
Pipe sets air sifter to be connected with the preceding air bag other end.
It is preferred that, the snap joint is the gas output device of inert gas delivery pipe, and snap joint passes through rubber
Flexible pipe is connected the inert gas conveying device collectively constituted in pipeline with built-in flexible pipe and air sifter.
It is preferred that, the quick ball valve is with the gas output device that pressure-reducing valve is compressed gas delivery pipe, and pressure-reducing valve
Preceding air bag automatically adjusts protection device with gas pressure constant pressure in rear gasbag.
It is preferred that, another group of valve phase that the quick ball valve is set with pressure-reducing valve by rubber hose and preceding air bag one end
Connection, and be connected by preceding air bag with rear gasbag and collectively constitute inflatable plugging device.
It is preferred that, the protective case is the protection device for connecting rubber hose between preceding air bag and rear gasbag, and is protected
Sheath is arranged in pipeline at the position of weld bond.
It is preferred that, the preceding air bag is inflation plugging device in inert gas front end in pipeline, and rear gasbag is end in pipeline
End inflation plugging device.
It is preferred that, it is mm that the preceding air bag and rear gasbag, which are inflation amount one side, and preceding air bag and rear gasbag is resistance to
High-temperature DEG C more than.
It is preferred that, the preceding air bag (4) is filled with oval in shape after compressed air expansion with rear gasbag (10).
Compared with prior art, beneficial effects of the present invention are as follows：
It is of the invention main main by oval swelling gasbag, snap joint, quick ball valve, pressure-reducing valve, air sifter, protective case etc.
Part is constituted.With flexible multi-purpose：Different degrees of air bag swell increment can be used for the pipeline of a variety of inside diameter ranges, flexible connection
Tracheae can be applied to a variety of space structures；Cost efficiency：Airtight cavity only is formed in the regional area of weld seam both sides, can be subtracted
Small plenum space, saves argon gas, shortens air time swap；Lift quality：Airtight cavity is small, and purity inert gas is high, lifting
Back weld corrosion resistance；It is finished and tears open, pipe surface is pollution-free；It is easy to maintenance：Modularization, the design of interchangeable component, are easy to
Install, can independently change.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
In figure：1st, pipeline；2nd, weld bond；3rd, snap joint；4th, preceding air bag；5th, built-in flexible pipe；6th, air sifter；7th, quick ball valve；8
Pressure-reducing valve,；9th, protective case；10th, rear gasbag.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, a kind of plugging device for welded pipe line internal protection gas, interior inflation plugging device includes fast
Quick coupling 3 is collectively constituted with preceding air bag 4, built-in flexible pipe 5, air sifter 6, quick ball valve 7, pressure-reducing valve 8, protective case 9 and rear gasbag 10.
One end of preceding air bag 4 is provided with two groups of valves, and the other end of preceding air bag 4 is provided with one group of valve and air sifter 6.Rear gasbag 10
One end be provided with one group of valve, and the valve on rear gasbag 10 passes through rubber hose and sets one group of gas with the preceding other end of air bag 4
Mouth is connected.Preceding air bag 4 is separately positioned in two groups of pipelines 1 at weld bond 2 in the inwall of the left and right sides with rear gasbag 10, and preceding gas
It is connected between capsule 4 and rear gasbag 10 by rubber hose.Built-in flexible pipe 5 is provided with preceding air bag 4, and built-in flexible pipe 5 is with before
One group of suction nozzle that the outer wall one end of air bag 4 is set is connected, and built-in flexible pipe 5 sets air sifter 6 to be connected with the preceding other end of air bag 4.
Specifically, snap joint 3 is the gas output device of inert gas delivery pipe, and snap joint 3 is soft by rubber
Manage the inert gas conveying device for being connected with built-in flexible pipe 5 and air sifter 6 and collectively constituting in pipeline 1.
Specifically, quick ball valve 7 and the gas output device that pressure-reducing valve 8 is compressed gas delivery pipe, and before pressure-reducing valve 8 is
Air bag 4 automatically adjusts protection device with gas pressure constant pressure in rear gasbag 10.
Specifically, another group of valve phase that quick ball valve 7 is set with pressure-reducing valve 8 by rubber hose and preceding one end of air bag 4
Connection, and be connected by preceding air bag 4 with rear gasbag 10 and collectively constitute inflatable plugging device.
Specifically, protection device of the protective case 9 for connection rubber hose between preceding air bag 4 and rear gasbag 10, and protective case 9
It is arranged in pipeline 1 at the position of weld bond 2.
Specifically, preceding air bag 4 is inflation plugging device in inert gas front end in pipeline 1, and rear gasbag 10 is end in pipeline 1
End inflation plugging device.
Specifically, it is 20mm that preceding air bag 4 and rear gasbag 10, which are inflation amount one side, and preceding air bag 4 and rear gasbag 10
High temperature resistant degree more than 150 DEG C.
Specifically, preceding air bag (4) is filled with oval in shape after compressed air expansion with rear gasbag (10).
A kind of application method of plugging device for welded pipe line internal protection gas：
1st, open and be connected with after the Quick connected ball valve 7 of compressed air, what preceding air bag 4 was conveyed with rear gasbag 10 by rubber hose
Expanded after compressed air inflation, and block the front and rear inwall of pipeline 1.
2nd, over-pressed air bag is lost heart by pressure-reducing valve 8, prevents that air bag from producing excessive elastic deformation and failing.
3rd, inert gas is connected, inert gas is conveyed by rubber hose enters air bag and tube wall formation via air sifter 6
Weld seam back airtight cavity, by the displacement of certain time, is reduced to finite concentration scope, really by the oxygen content in confined space
Protect in welding process, back weld seam will not produce over oxidation.
4th, after the completion of welding, inert gas is closed, the compressed air of inside air bag is emptied, by whole device from pipeline back
Extract out, operation is finished.
In summary：A kind of plugging device for welded pipe line internal protection gas, by being filled to inside swelling gasbag
Dilatancy can be produced by entering after compressed air, gasbag ektexine stops inflation after being fitted completely with inner-walls of duct, reaches pipe end
The purpose of closure.An air bag is respectively being placed apart from the both sides of weld seam certain distance, the air bag expanded after inflation and pipeline are together
Airtight cavity is constituted, the purpose for accommodating simultaneously sealed inert protective gas is reached.
Different degrees of elastic deformation can be produced using the different aeration quantity of air bag, the purpose of closure different tube diameters is reached.
After two swelling gasbags are connected by flexible pipe, it can be connected with station compressed air, opening is connected on to carry on flexible pipe and quickly connect
The ball valve of head, connects compressed air and air bag is blown afloat into expansion, reach after certain pressure that the deflation of pressure-reducing valve protectiveness now stops
Only to airbag aeration, air bag is fitted completely with inner-walls of duct.In welding process, the air in air bag, can because of heated pressure increase
To lose heart by pressure-reducing valve, the effect of protection air bag is reached.Enter the indifferent gas for the airtight cavity that air bag is formed by flexible pipe
Body, via the comprehensive diffusion of air sifter having towards each orientation through hole of space, the inert gas that weld seam back can be avoided to be filled with
Air in turbulization, more efficient displacement airtight cavity.After the completion of welding, snap joint and ball valve are disconnected, air bag is put
Air pressure contracts, and can complete welding readjusting operations by tracheae extraction inside pipeline by it.Improve weld job efficiency and reduction production
Product total production cost advantage, the problem of solving in existing pipeline welding on inert gas plugging device.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understand and these embodiments can be carried out without departing from the principles and spirit of the present invention a variety of changes, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of plugging device for welded pipe line internal protection gas, it is characterised in that：The interior inflation plugging device bag
Include snap joint (3) and preceding air bag (4), built-in flexible pipe (5), air sifter (6), quick ball valve (7), pressure-reducing valve (8), protective case (9)
And rear gasbag (10) is collectively constituted；One end of the preceding air bag (4) is provided with two groups of valves, and in the other end of preceding air bag (4)
It is provided with one group of valve and air sifter (6)；One end of the rear gasbag (10) is provided with the gas on one group of valve, and rear gasbag (10)
Mouth sets one group of valve to be connected by rubber hose with preceding air bag (4) other end；The preceding air bag (4) and rear gasbag
(10) in the inwall for being separately positioned on two groups of pipeline (1) interior weld bond (2) place left and right sides, and preceding air bag (4) and rear gasbag (10)
Between be connected by rubber hose；Be provided with built-in flexible pipe (5) in the preceding air bag (4), and built-in flexible pipe (5) with it is described before
One group of suction nozzle that air bag (4) outer wall one end is set is connected, and the built-in flexible pipe (5) is set with preceding air bag (4) other end
Air sifter (6) is put to be connected.
2. a kind of plugging device for welded pipe line internal protection gas according to claim 1, it is characterised in that：Institute
State snap joint (3) be inert gas delivery pipe gas output device, and snap joint (3) by rubber hose with it is built-in soft
Pipe (5) and air sifter (6) are connected the inert gas conveying device collectively constituted in pipeline (1).
3. a kind of plugging device for welded pipe line internal protection gas according to claim 1, it is characterised in that：Institute
State quick ball valve (7) and the gas output device that pressure-reducing valve (8) is compressed gas delivery pipe, and pressure-reducing valve (8) is preceding air bag (4)
Protection device is automatically adjusted with the interior gas pressure constant pressure of rear gasbag (10).
4. a kind of plugging device for welded pipe line internal protection gas according to claim 1, it is characterised in that：Institute
Quick ball valve (7) is stated with pressure-reducing valve (8) by rubber hose with another group of valve that preceding air bag (4) one end is set to be connected, and
It is connected by preceding air bag (4) with rear gasbag (10) and collectively constitutes inflatable plugging device.
5. a kind of plugging device for welded pipe line internal protection gas according to claim 1, it is characterised in that：Institute
State protection device of the protective case (9) for the connection rubber hose between preceding air bag (4) and rear gasbag (10), and protective case (9)
At the position for being arranged on pipeline (1) interior weld bond (2).
6. a kind of plugging device for welded pipe line internal protection gas according to claim 1, it is characterised in that：Institute
Preceding air bag (4) is stated to fill for pipeline (1) interior end for the interior inert gas front end inflation plugging device of pipeline (1), and rear gasbag (10)
Sealing gland block apparatus.
7. a kind of plugging device for welded pipe line internal protection gas according to claim 1, it is characterised in that：Institute
It is 20mm to state preceding air bag (4) and rear gasbag (10) and be inflation amount one side, and the resistance to height of preceding air bag (4) and rear gasbag (10)
Temperature is more than 150 DEG C.
8. a kind of plugging device for welded pipe line internal protection gas according to claim 1, it is characterised in that：Institute
State preceding air bag (4) and be filled with oval in shape after compressed air expansion with rear gasbag (10).
9. a kind of application method of plugging device for welded pipe line internal protection gas：It is characterized in that：
(1) open and be connected with after the Quick connected ball valve of compressed air (7), preceding air bag (4) and rear gasbag (10) are defeated by rubber hose
Expanded after the compressed air inflation sent, and block the front and rear inwall of pipeline (1)；
(2) over-pressed air bag is lost heart by pressure-reducing valve (8)；
(3) inert gas is connected, inert gas is conveyed by rubber hose enters air bag and the weldering of tube wall formation via air sifter (6)
Back airtight cavity is stitched, by the displacement of certain time, the oxygen content in confined space is reduced to finite concentration scope, it is ensured that
In welding process, back weld seam will not produce over oxidation；
(4) after the completion of welding, inert gas is closed, the compressed air of inside air bag is emptied, whole device is taken out from pipeline back
Go out, operation is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710334982.1A CN106944776A (en) | 2017-05-12 | 2017-05-12 | A kind of plugging device for welded pipe line internal protection gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710334982.1A CN106944776A (en) | 2017-05-12 | 2017-05-12 | A kind of plugging device for welded pipe line internal protection gas |
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| CN106944776A true CN106944776A (en) | 2017-07-14 |
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| CN201710334982.1A Pending CN106944776A (en) | 2017-05-12 | 2017-05-12 | A kind of plugging device for welded pipe line internal protection gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107414357A (en) * | 2017-08-25 | 2017-12-01 | 中国海洋石油总公司 | The argon filling closure air bag of stainless steel tube wire bonding weld bond under the conditions of restricted clearance |
| CN108500425A (en) * | 2018-05-28 | 2018-09-07 | 中国水利水电第十四工程局有限公司 | A kind of airbag apparatus of gas-filled protective weldering |
| CN109175813A (en) * | 2018-10-30 | 2019-01-11 | 江苏卫蓝医疗科技有限公司 | It is a kind of for medical gas pipeline welding pipe in plugging device |
| CN109277729A (en) * | 2018-10-18 | 2019-01-29 | 中船澄西船舶修造有限公司 | A kind of steel-pipe welding protection gas tooling |
| CN109945009A (en) * | 2019-04-17 | 2019-06-28 | 海洋石油工程（青岛）有限公司 | Stainless steel tube wire bonding argon filling blocks air bag |
| CN110587081A (en) * | 2019-09-02 | 2019-12-20 | 新兴铸管股份有限公司 | Steel pipe continuous argon arc welding weld back protection device |
| CN112228689A (en) * | 2020-10-10 | 2021-01-15 | 西南石油大学 | Anti-airflow device for welding oil and gas pipelines |
| CN112496602A (en) * | 2020-11-12 | 2021-03-16 | 福建福清核电有限公司 | Air bag type welding argon filling protection method for nuclear power plant |
| CN113884306A (en) * | 2021-09-30 | 2022-01-04 | 安徽江淮汽车集团股份有限公司 | Plugging device |
| CN113945323A (en) * | 2020-07-16 | 2022-01-18 | 苏州协同创新智能制造装备有限公司 | Air tightness detection method and detection system of ball valve equipment |
| CN117206817A (en) * | 2023-10-11 | 2023-12-12 | 南通世睿电力科技有限公司 | Pipeline welding plugging device |
| CN117733466A (en) * | 2024-01-30 | 2024-03-22 | 浙江方德机器人***技术有限公司 | Pipeline internal stay is fixed and butt joint group is to mechanism |
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|---|---|---|---|---|
| CN107414357A (en) * | 2017-08-25 | 2017-12-01 | 中国海洋石油总公司 | The argon filling closure air bag of stainless steel tube wire bonding weld bond under the conditions of restricted clearance |
| CN108500425A (en) * | 2018-05-28 | 2018-09-07 | 中国水利水电第十四工程局有限公司 | A kind of airbag apparatus of gas-filled protective weldering |
| CN109277729B (en) * | 2018-10-18 | 2020-12-04 | 中船澄西船舶修造有限公司 | Steel pipe welding protective gas tool |
| CN109277729A (en) * | 2018-10-18 | 2019-01-29 | 中船澄西船舶修造有限公司 | A kind of steel-pipe welding protection gas tooling |
| CN109175813A (en) * | 2018-10-30 | 2019-01-11 | 江苏卫蓝医疗科技有限公司 | It is a kind of for medical gas pipeline welding pipe in plugging device |
| CN109945009A (en) * | 2019-04-17 | 2019-06-28 | 海洋石油工程（青岛）有限公司 | Stainless steel tube wire bonding argon filling blocks air bag |
| CN110587081A (en) * | 2019-09-02 | 2019-12-20 | 新兴铸管股份有限公司 | Steel pipe continuous argon arc welding weld back protection device |
| CN113945323A (en) * | 2020-07-16 | 2022-01-18 | 苏州协同创新智能制造装备有限公司 | Air tightness detection method and detection system of ball valve equipment |
| CN112228689A (en) * | 2020-10-10 | 2021-01-15 | 西南石油大学 | Anti-airflow device for welding oil and gas pipelines |
| CN112496602A (en) * | 2020-11-12 | 2021-03-16 | 福建福清核电有限公司 | Air bag type welding argon filling protection method for nuclear power plant |
| CN112496602B (en) * | 2020-11-12 | 2022-09-16 | 福建福清核电有限公司 | Air bag type welding argon filling protection method for nuclear power plant |
| CN113884306A (en) * | 2021-09-30 | 2022-01-04 | 安徽江淮汽车集团股份有限公司 | Plugging device |
| CN117206817A (en) * | 2023-10-11 | 2023-12-12 | 南通世睿电力科技有限公司 | Pipeline welding plugging device |
| CN117206817B (en) * | 2023-10-11 | 2024-01-30 | 南通世睿电力科技有限公司 | Pipeline welding plugging device |
| CN117733466A (en) * | 2024-01-30 | 2024-03-22 | 浙江方德机器人***技术有限公司 | Pipeline internal stay is fixed and butt joint group is to mechanism |
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Application publication date: 20170714 |
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