CN101954545A - Method for welding crimped rim of pipeline connecting piece - Google Patents
Method for welding crimped rim of pipeline connecting piece Download PDFInfo
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- CN101954545A CN101954545A CN 201010280197 CN201010280197A CN101954545A CN 101954545 A CN101954545 A CN 101954545A CN 201010280197 CN201010280197 CN 201010280197 CN 201010280197 A CN201010280197 A CN 201010280197A CN 101954545 A CN101954545 A CN 101954545A
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- pipeline connecting
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Abstract
The invention relates to a method for welding a crimped rim of a pipeline connecting piece. The method comprises the following steps of: selecting a section of steel pipe which has the same material, specification and wall thickness as those of a finished pipeline connecting pipe fitting, cutting and blanking, and forming a welding groove so as to obtain a connecting pipe; selecting a steel plate of which the material is the same as that of a nominal pipe and the inner diameter is 2 to 5 millimeters larger than the outer diameter of the finished pipeline connecting pipe fitting, cutting and blanking, and forming the crimped rim of the welding groove on an inner side; and putting the crimped rim and the connecting pipe into a welding device for the crimped rim of the pipeline connecting piece and welding so as to obtain the pipeline connecting piece with the crimped rim. The method has the advantages of decreasing the using amount of welding protective gas by 60 to 80 percent, achieving high welding efficiency, reducing subsequent reshaping processes and improving production efficiency.
Description
One, technical field
The present invention relates to a kind of welding method of flange, relate in particular to a kind of welding method of flange of conduit coupling.
Two, background technology
Weldering system flange (welding neck collar) is usually used in medium temperature and pressure is not high and in the pressure pipeline that corrosive medium is stronger.When corrosive medium was strong, the part of flange contact medium (flange) be materials such as corrosion resistant high-grade material such as stainless steel, and is outside then utilize the flange ring of low grade material such as carbon steel material to clamp it to seal with realization; So just can reduce the cost of whole piece pipeline.Weldering system flange (welding neck collar) because; weldering system flange all is special materials such as stainless steel or copper alloy, nickel-base alloy, Hastelloy; need the applying argon gas protection when the bottoming welding, special material such as Hastelloy more needs high-purity argon gas protection, and this has increased welding cost undoubtedly.In addition, overlap edge is easy to produce welding deformation owing to be subjected to the influence of the welding stress of angle welding, is easy to cause the sealing surface of flange to process.
Three, summary of the invention
At above-mentioned shortcoming, the object of the present invention is to provide the welding method of flange that a kind ofly can reduce the argon gas consumption, be not easy to produce the conduit coupling of welding deformation.
Technology contents of the present invention is, a kind of welding method of flange of conduit coupling, and its step is as follows:
(1), select the steel pipe of a section identical material with the finished product pipeline connecting pipe fitting, specification and wall thickness for use, carry out cutting stock, and beat bevel for welding and must take over;
(2), select a steel plate with the identical material of nominal pipe for use, cutting stock, internal diameter is greater than finished product pipeline connecting pipe fitting external diameter 2～5mm and beat the flange of bevel for welding in the inboard;
(3), the welder of flange and adapter being put into the flange of conduit coupling weld the conduit coupling of band flange; The welder of the flange of conduit coupling comprises welding base, annular solder pressing plate, pressing plate cushion block and appendix; There is annular lip centre at the welding base, is provided with an annular groove in the annular lip outside; The annular solder pressing plate is installed and is connected on the welding base, is provided with gas distribution channel in the welding base, and an end of gas distribution channel is communicated with appendix, and the other end of gas distribution channel communicates with annular groove; Wherein take over and be inserted in the middle annular lip of welding base, flange is placed on the welding base and is enclosed within take over the outside; Annular solder pressing plate and at flange underlay pressing plate cushion block on press-fiting on the flange limit is adjusted the welded gaps of weldering system flange overlap edge and adapter, to around welded gaps even, annular groove aligning welded gaps; Make the annular solder pressing plate compress flange; Spot welding weldering system flange and adapter, appendix input protection gas makes protective gas spray into welded gaps by gas distribution channel by annular groove simultaneously, and the backing welding of butt tube and flange carries out welding protection.
What the present invention was compared with prior art had is a little:
(1), the welding protection gas usage reduces 60-80% and welding efficiency height.
(2), reduced follow-up trimming, improved production efficiency.
Four, description of drawings
Fig. 1 is the structural representation of the welder of the flange of conduit coupling among the present invention.
Five, specific embodiment
As shown in Figure 1, a kind of welder of flange of conduit coupling is characterized by it and comprises welding base 1, annular solder pressing plate 2, pressing plate cushion block 3 and appendix 4; There is annular lip 1.1 centre at welding base 1, is provided with an annular groove 1.2 in annular lip 1.1 outsides; Annular solder pressing plate 2 is installed and is connected on the welding base 1, is provided with gas distribution channel 1.3 in welding base 1, and an end of gas distribution channel 1.3 is communicated with appendix 4, and the other end of gas distribution channel 1.3 communicates with annular groove 1.2.
Example 1, production specification: the conduit coupling of the band flange of the short type of DN200 SCH40S, its material: 316L, standard is ASME B16.9;
(1), the section of selecting for use material is that 316L, specification are the steel pipe of φ 219*8.18mm, carries out cutting stock, and beats bevel for welding and must take over 5, taking over 5 length is 105mm;
(2), to select a bulk matter for use be that 316L, thickness are the steel plate of 12mm, cutting stock, external diameter 272mm, internal diameter 223mm also beats bevel for welding in the inboard and gets flange 6;
(3), will take over 5 annular lip 1.1 of being inserted in the middle of the welding base 1, flange 6 is placed on the welding base 1 and is enclosed within take over 5 outsides; Annular solder pressing plate 2 and at flange 6 underlay pressing plate cushion blocks 3 on press-fiting on flange 6 limits is adjusted the welded gaps 7 of weldering system flange overlap edge and adapter, to around welded gaps 7 even, annular groove 1.2 aligning welded gaps 7; Tight a bolt and 8 make annular solder pressing plate 2 compress flange 6; Spot welding weldering system flange 6 and adapter 5, appendix 4 input protection gases (argon gas) make protective gas spray into welded gaps 7 by gas distribution channel 1.3 by annular groove 1.2 simultaneously, and butt tube 5 carries out welding protection with the backing welding of flange 6; Must be with the conduit coupling of flange;
(4), the conduit coupling of the band flange that makes in the step (3) is revised with the weld seam junction between lathe butt tube 5 and the flange 6, make take over 5 and flange 6 between the weld seam junction meet the requirement of ASMEB16.9 or GB12459; The conduit coupling of this band flange is carried out the water pressure test, test pressure 45MPa, pressurize 30S, result of the test: flange does not break, and is qualified.
Claims (1)
1. the welding method of the flange of a conduit coupling, its step is as follows:
(1), select the steel pipe of a section identical material with the finished product pipeline connecting pipe fitting, specification and wall thickness for use, carry out cutting stock, and beat bevel for welding and must take over;
(2), select a steel plate with the identical material of nominal pipe for use, cutting stock, internal diameter is greater than finished product pipeline connecting pipe fitting external diameter 2～5mm and beat the flange of bevel for welding in the inboard;
(3), the welder of flange and adapter being put into the flange of conduit coupling weld the conduit coupling of band flange; The welder of the flange of conduit coupling comprises welding base, annular solder pressing plate, pressing plate cushion block and appendix; There is annular lip centre at the welding base, is provided with an annular groove in the annular lip outside; The annular solder pressing plate is installed and is connected on the welding base, is provided with gas distribution channel in the welding base, and an end of gas distribution channel is communicated with appendix, and the other end of gas distribution channel communicates with annular groove; Wherein take over and be inserted in the middle annular lip of welding base, flange is placed on the welding base and is enclosed within take over the outside; Annular solder pressing plate and at flange underlay pressing plate cushion block on press-fiting on the flange limit is adjusted the welded gaps of weldering system flange overlap edge and adapter, to around welded gaps even, annular groove aligning welded gaps; Make the annular solder pressing plate compress flange; Spot welding weldering system flange and adapter, appendix input protection gas makes protective gas spray into welded gaps by gas distribution channel by annular groove simultaneously, and the backing welding of butt tube and flange carries out welding protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102801970A CN101954545B (en) | 2010-09-14 | 2010-09-14 | Method for welding crimped rim of pipeline connecting piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102801970A CN101954545B (en) | 2010-09-14 | 2010-09-14 | Method for welding crimped rim of pipeline connecting piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101954545A true CN101954545A (en) | 2011-01-26 |
| CN101954545B CN101954545B (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102801970A Active CN101954545B (en) | 2010-09-14 | 2010-09-14 | Method for welding crimped rim of pipeline connecting piece |
Country Status (1)
| Country | Link |
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| CN (1) | CN101954545B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107553070A (en) * | 2017-09-03 | 2018-01-09 | 安徽天裕汽车零部件制造有限公司 | A kind of high efficiency processing method of flange bushing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS589789A (en) * | 1981-07-10 | 1983-01-20 | Hitachi Ltd | Method and device for welding piping |
| CN201269372Y (en) * | 2008-10-09 | 2009-07-08 | 杭州市特种设备检测院 | Soldering connection structure of aluminum and aluminum alloy pipe |
| CN201471064U (en) * | 2009-03-26 | 2010-05-19 | 中建三局第一建设工程有限责任公司 | Device for argon-filling protection in welding |
-
2010
- 2010-09-14 CN CN2010102801970A patent/CN101954545B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS589789A (en) * | 1981-07-10 | 1983-01-20 | Hitachi Ltd | Method and device for welding piping |
| CN201269372Y (en) * | 2008-10-09 | 2009-07-08 | 杭州市特种设备检测院 | Soldering connection structure of aluminum and aluminum alloy pipe |
| CN201471064U (en) * | 2009-03-26 | 2010-05-19 | 中建三局第一建设工程有限责任公司 | Device for argon-filling protection in welding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107553070A (en) * | 2017-09-03 | 2018-01-09 | 安徽天裕汽车零部件制造有限公司 | A kind of high efficiency processing method of flange bushing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101954545B (en) | 2012-05-23 |
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Effective date of registration: 20160826 Address after: Changshan town 214429 high tech Industrial Development Zone, Jiangsu city of Jiangyin Province as Bridge No. 3 in the South South Group Patentee after: The Central-South heavy industry Co., Ltd in Jiangyin Address before: 214437 No. 788 Jin Shan Road, Binjiang Development Zone, Jiangsu, Jiangyin Patentee before: Jiangyin Zhongnan Heavy Industry Furnishment Co., Ltd. |