CN203171132U - Large-diameter pipeline welding back gas protective cover - Google Patents
Large-diameter pipeline welding back gas protective cover Download PDFInfo
- Publication number
- CN203171132U CN203171132U CN 201320192210 CN201320192210U CN203171132U CN 203171132 U CN203171132 U CN 203171132U CN 201320192210 CN201320192210 CN 201320192210 CN 201320192210 U CN201320192210 U CN 201320192210U CN 203171132 U CN203171132 U CN 203171132U
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- gas
- protective cover
- welding
- air inlet
- diameter pipeline
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- Arc Welding In General (AREA)
Abstract
The utility model discloses a large-diameter pipeline welding back gas protective cover which comprises a gas inlet cabin and a gas inlet connector communicated with the gas inlet cabin. The gas inlet connector is communicated with one end of a gas inlet soft pipe through a control valve, and the other end of the gas inlet soft pipe is communicated with a gas source. The large-diameter pipeline welding back gas protective cover is mainly used for gas protection of the back during butt welding of pipelines with diameters larger than 20 inches. When the pipelines are welded, the protective cover is placed in an assembled pipeline at the position of a welding seam required to be welded. A gas source valve is opened, gas is led in, the gas inlet cabin and the periphery of the welding seam form a relatively closed space, a protective effect on the welding seam is achieved during welding, and gas use amount is saved. The large-diameter pipeline welding back gas protective cover is simple in structure and low in manufacture cost, can guarantee welding quality and reduces rework rate and project cost.
Description
Technical field
The utility model relates to the engineering pipeline installing area, and particularly a kind of caliber is greater than the butt-welded backside gas protective cover of 20 cun big-diameter pipeline.
Background technology
In petroleum chemical engineering, stainless steel pipes is used very extensive, for big footpath stainless steel tube, argon arc welding when bottoming, if adopt common closure plate inflation back-protective method, then be difficult for draining air during exhaust, form mist, protect bad when causing welding and oxidation; For fixing port, closure plate can't take out, and caliber is excessive, can not, add tube wall thickness and not wait if meet elbow, threeway every gas-filled protective with water-soluble paper is stifled, and not only protective device is difficult to removal, the argon gas consumption is big, and has increased the welding difficulty.
The utility model content
Goal of the invention of the present utility model is: at the problem of above-mentioned existence, provide a kind of simple in structure, and low cost of manufacture, and can guarantee welding quality, and reduce rework rate, reduce the big-diameter pipeline welding backside gas protective cover of engineering cost.
The technical solution of the utility model is achieved in that a kind of big-diameter pipeline welding backside gas protective cover; it is characterized in that: comprise air inlet storehouse and the intake interface that is communicated with the air inlet storehouse; described intake interface is communicated with air induction hose one end by by-pass valve control, and the described air induction hose other end is communicated with source of the gas.
Big-diameter pipeline described in the utility model welding backside gas protective cover, its in described air inlet storehouse, the gas outlet end in air inlet storehouse is provided with gas distribution grid, described gas distribution grid is provided with some equally distributed ventholes.
Big-diameter pipeline welding backside gas protective cover described in the utility model, the vertical cross-section in its described air inlet storehouse is horn-like, and its osculum end is communicated with described intake interface, and its big opening end is the gas outlet end, and described gas outlet end correspondence is arranged on the commissure.
Big-diameter pipeline welding backside gas protective cover described in the utility model, the horizontal cross-section in its described air inlet storehouse is rectangle, and the horizontal cross sectional geometry in the shape of described gas distribution grid and air inlet storehouse is complementary.
The gas shield at back side when the utility model is mainly used in caliber greater than 20 cun pipeline butt joint welding; when pipeline welding; the utility model is placed in the pipeline that has assembled; and be placed on the commissure that needs welding; open gas source valve, behind the feeding gas, the air inlet storehouse forms a relative airtight space on every side with weld seam; thereby when welding, play the effect that butt welded seam is protected, and save gas usage.The utility model is simple in structure, low cost of manufacture, and can guarantee welding quality, and reduce rework rate, reduce the cost of engineering.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Fig. 4 is the structural representation of gas distribution grid in the utility model.
Mark among the figure: 1 is the air inlet storehouse, and 2 is intake interface, and 3 is by-pass valve control, and 4 is air induction hose, and 5 is gas distribution grid, and 6 is venthole.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Shown in Fig. 1-4; a kind of big-diameter pipeline welding backside gas protective cover; comprise air inlet storehouse 1 and the intake interface 2 that is communicated with air inlet storehouse 1; described intake interface 2 is communicated with air induction hose 4 one ends by by-pass valve control 3; described air induction hose 4 other ends are communicated with source of the gas; in described air inlet storehouse 1, the gas outlet end in air inlet storehouse 1 is provided with gas distribution grid 5; described gas distribution grid 5 is provided with some equally distributed ventholes 6; make that the argon flow amount that enters weld bond is very even, guarantee the even distribution of gas.
Wherein, the vertical cross-section in described air inlet storehouse 1 is horn-like, its osculum end is communicated with described intake interface 2, its big opening end is the gas outlet end, described gas outlet end correspondence is arranged on the commissure, the horizontal cross-section in described air inlet storehouse 1 is rectangle, and the horizontal cross sectional geometry in the shape of described gas distribution grid 5 and air inlet storehouse 1 is complementary.
Operation principle of the present utility model: when pipeline butt joint welding need be protected; the utility model is placed in the pipeline that has assembled; and the gas outlet end correspondence in air inlet storehouse is put in the commissure that needs welding; open gas source valve then; after feeding gas; form a relative airtight space in the air inlet storehouse on every side with weld seam, thereby when welding, play the effect that butt welded seam is protected, and save gas usage
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (4)
1. a big-diameter pipeline welds the backside gas protective cover; it is characterized in that: comprise air inlet storehouse (1) and the intake interface (2) that is communicated with air inlet storehouse (1); described intake interface (2) is communicated with air induction hose (4) one ends by by-pass valve control (3), and described air induction hose (4) other end is communicated with source of the gas.
2. big-diameter pipeline according to claim 1 welds the backside gas protective cover; it is characterized in that: in described air inlet storehouse (1), the gas outlet end of air inlet storehouse (1) is provided with gas distribution grid (5), described gas distribution grid (5) is provided with some equally distributed ventholes (6).
3. big-diameter pipeline according to claim 2 welds the backside gas protective cover; it is characterized in that: the vertical cross-section in described air inlet storehouse (1) is horn-like; its osculum end is communicated with described intake interface (2), and its big opening end is the gas outlet end, and described gas outlet end correspondence is arranged on the commissure.
4. big-diameter pipeline according to claim 3 welds the backside gas protective cover, and it is characterized in that: the horizontal cross-section in described air inlet storehouse (1) is rectangle, and the horizontal cross sectional geometry of the shape of described gas distribution grid (5) and air inlet storehouse (1) is complementary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320192210 CN203171132U (en) | 2013-04-16 | 2013-04-16 | Large-diameter pipeline welding back gas protective cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320192210 CN203171132U (en) | 2013-04-16 | 2013-04-16 | Large-diameter pipeline welding back gas protective cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203171132U true CN203171132U (en) | 2013-09-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320192210 Expired - Lifetime CN203171132U (en) | 2013-04-16 | 2013-04-16 | Large-diameter pipeline welding back gas protective cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203171132U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105522263A (en) * | 2016-02-29 | 2016-04-27 | 上海瑞尔实业有限公司 | Welding equipment of cast magnesium alloy and welding process thereof |
| CN105537731A (en) * | 2015-11-18 | 2016-05-04 | 森松（江苏）重工有限公司 | Gas shielding tool for back of gas shielded welding seam |
| CN108817785A (en) * | 2017-01-03 | 2018-11-16 | 武汉电信器件有限公司 | A kind of soldering and sealing fixture |
| CN112453653A (en) * | 2020-11-17 | 2021-03-09 | 华能山东石岛湾核电有限公司 | Open type back argon filling protection device |
-
2013
- 2013-04-16 CN CN 201320192210 patent/CN203171132U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537731A (en) * | 2015-11-18 | 2016-05-04 | 森松（江苏）重工有限公司 | Gas shielding tool for back of gas shielded welding seam |
| CN105537731B (en) * | 2015-11-18 | 2018-05-11 | 森松（江苏）重工有限公司 | A kind of gas shielded arc welding back of weld gas shield frock |
| CN105522263A (en) * | 2016-02-29 | 2016-04-27 | 上海瑞尔实业有限公司 | Welding equipment of cast magnesium alloy and welding process thereof |
| CN108817785A (en) * | 2017-01-03 | 2018-11-16 | 武汉电信器件有限公司 | A kind of soldering and sealing fixture |
| CN112453653A (en) * | 2020-11-17 | 2021-03-09 | 华能山东石岛湾核电有限公司 | Open type back argon filling protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130904 |
|
| CX01 | Expiry of patent term |