CN101251211A - Predeformation structure of plane welding flange - Google Patents
Predeformation structure of plane welding flange Download PDFInfo
- Publication number
- CN101251211A CN101251211A CNA2008100612587A CN200810061258A CN101251211A CN 101251211 A CN101251211 A CN 101251211A CN A2008100612587 A CNA2008100612587 A CN A2008100612587A CN 200810061258 A CN200810061258 A CN 200810061258A CN 101251211 A CN101251211 A CN 101251211A
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- China
- Prior art keywords
- flange
- predeformation
- welding
- section
- steel pipe
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/003—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to controlling of welding distortion
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
- F16L23/026—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes by welding
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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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The invention discloses a plane welding flange predeformation structure which comprises a flange and steel pipes, wherein, ends of the steel pipes are welded with the flange, the geometric centers of the cross-sections of the flange near the welding positions deviate toward the direction away from the steel pipes before the welding, the deviated parts form predeformation sections. The invention provides a plane welding flange predeformation structure of decreasing the cost and alleviating the labor intensity.
Description
Technical field
The present invention relates to the face-flange welding technique, especially a kind of plane welding flange structure.
Background technique
Plane welding flange is widely used in the linkage structures such as steel pipe casing girder steel in pressure piping, long distance pipeline, process pipe, the Steel Structure Work, link to each other with structure such as steel pipe by welding, and the welding type flange always produces post welding distortion inevitably, these distortion can cause the flange surface out-of-flatness, cause gas leakage, leak, leakage of oil, local bolt strength obviously descends, and makes it connection part and ruptures, and causes Accident due to qualitys such as structure early damage.Pipe diameter is big more, and distortion is just big more, and flange is thin more, is out of shape also big more.Particularly the distortion of major diameter plane welding flange is linear increase, causes the surface of contact marginal gap to exceed standard, thereby can not satisfy design and code requirement.
Manufacturing industry is commonly used both at home and abroad at present prevents that the method for being out of shape from being:
(1), relies on flexibly connecting of different materials: add various liners as inner ring at flange, comprise the liner that alloys such as copper, titanium are made, offset the gap that welding deformation produced, it is the most common that this method is used, thereby cost is increased substantially, this class liner in use also needs often to change, and making it maintenance cost increases once more.Because this method that adds the cushions makes the gap have flexibility, workpiece accuracy reduces, and generally can not be applied to high-temperature and pressure pipeline and load steel structure.
(2), increase the rigidity of flanged surface: make an identical size of flange therewith earlier, the template that thickness is thicker, this template is connected by high-strength bolt with flange, increase flange thickness indirectly, increase the thermal conductivity of flange, improve the rigidity of flange, promptly improve the ability of flange opposing welding deformation and come controlled deformation.This method gets to be made a plurality of rigidly fixing in advance and uses flange, connects with high-strength bolt then, and remove welding cooling back, spends more material and artificial, causes a large amount of wastes and damages the degree of finish at flange back.
(3), adopt the method for postheating: heat the texturing zone with oxy-acetylene flame, the texturing zone that makes it to produce because of welding stress is surrendered, the method that makes welding deformation reduce and eliminate after the cooling.Pay great amount of manpower though this method is useful and consume a large amount of oxygen, acetylene gas, very inconvenient to the multiple spot operation of large-scale thick flange especially, it is bigger unfavorable that operator's working environment and labor intensity are brought, and environment is produced certain influence.In addition, the method that adopts the oxy-acetylene heating comprises that to non-ferrous metal stainless steel, aluminium, magnesium alloy are more unfavorable, and alloy High Strength Structural Steel heating-up temperature is changed as controlling the improper tissue of joint that also will bring, cause reduction in strength, even the generation crack that is in operation.
Though more than three kinds of methods all use always, have the shortcoming expend steel, human and material resources, time and increase labor intensity.
Summary of the invention
In order to overcome the deficiency of the existing welded cost height of face-flange, increase labor intensity, the invention provides a kind of predeformation structure of plane welding flange that reduces cost, reduces labor intensity.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of predeformation structure of plane welding flange, comprise flange and steel pipe, the end of described steel pipe and flange welding are before welding, the part formation predeformation section of skew takes place to away from the skew of steel pipe direction in the geometrical center of the cross section of the part of the close weld of described flange.
As preferred a kind of scheme: described predeformation section is slope shape.Certain, the predeformation section also can be other shapes, for example curve etc.
As preferred another kind of scheme: described flange is a Shuan Quan hole flange, is provided with bolt hole on the flange of the both sides of described weld, is equipped with the predeformation section on the flange of the both sides of weld.
Further, described flange comprises front and back, and described front contacts with steel pipe, and the described front or the back side are provided with the predeformation section.
As preferred another kind of again scheme: described flange is an individual pen hole flange, is provided with bolt hole on the flange in the outside of described weld, is provided with the predeformation section on the flange in the outside of weld.
Further again, described flange comprises front and back, and described front contacts with steel pipe, and the described back side is provided with the predeformation section.
Technical conceive of the present invention is: cross the design to flanged surface, according to the thickness of flange, vary in size, welding method, welding sequence, welding parameter are not equal, repeatedly adjust the size of design, with welding deformation opposite surfaces shape.This shape, be copied to and make product reserve the amount of deformation that will occur on the face-flange to be welded, reach copying of predeformation and offset welding deformation, welding is once finished, needn't use prefabricated shuttering units to add supporting facility such as high-strength bolt is fixing or adopt heating to eliminate distortion.
Eliminate the influence of welding deformation, make two flange faying surface gaps satisfy GB GB50205-2001 " Code for acceptance of construction quality of steel structures " requirement the flange formation degree.
Beneficial effect of the present invention mainly shows: (1), reduce cost, reduce labor intensity; (2), do not adopt liner, reduce manufacture cost, increase the junction plane of Flange Plane, reach the increase stability of structure, make to connect reliably security of operation; (3), do not adopt flange to preset template, increase and rigidly fix flange, make it indeformable method, reduce the residual stress of postwelding, eliminate a large amount of extra template, the high-strength bolt that adopt this technology to bring and use the waste that is caused, reduce the manufacturing cycle simultaneously; (4), improve the environment and the labor intensity of construction operation, do not adopt the way of postheating to reduce the welding deformation of flange, stop simultaneously because the serious consequence that the overtemperature that the oxy-acetylene heating causes makes the joint microstructure performance change and bring; (5), the Flange Plane mating face is increased, overall stability increases, and guarantees the product safety operation, finally is out of shape size and is controlled in the 0.4mm, satisfies this high quality requirement.
Description of drawings
Fig. 1 is a Shuan Quan hole flange processing schematic representation.
Fig. 2 is the sectional view of Fig. 1.
Fig. 3 is the partial enlarged drawing of Shuan Quan hole flange processing.
Fig. 4 is an individual pen hole flange processing schematic representation.
Fig. 5 is the sectional view of a kind of individual pen hole flange processing.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Embodiment 1
With reference to Fig. 1～Fig. 3, a kind of predeformation structure of plane welding flange, comprise flange 1 and steel pipe 2, the end of described steel pipe 2 and flange 1 welding, before welding, the part formation predeformation section 3 of skew takes place to away from the skew of steel pipe 2 directions in the geometrical center of the cross section of the part of described flange 1 close weld.
Described predeformation section 3 is slope shape.Certain, the predeformation section also can be other shapes, for example curve etc.
Described flange 1 is a Shuan Quan hole flange, is provided with bolt hole on the flange of the both sides of described weld, is equipped with the predeformation section on the flange of the both sides of weld.Described flange 1 comprises front and back, and described front contacts with steel pipe, and the described front or the back side are provided with the predeformation section.
The shape of the predeformation section 3 of present embodiment is consistent with welding deformation opposite surfaces shape.This shape is copied to and makes product reserve the amount of deformation that will occur on the face-flange to be welded, reaches copying of predeformation and offsets welding deformation.
In the welded structure of present embodiment, holding out against surface of contact has the area more than 85% to be close to, and satisfies the requirement of GB GB50205-2001 " Code for acceptance of construction quality of steel structures " 8.3.3 bar.2, check that with the 0.3mm clearance gauge it fills in area less than answering 25%, two flange faying surface gap less than 0.8mm, satisfies the requirement of GB GB50205-2001 " Code for acceptance of construction quality of steel structures " 8.3.3 bar.
Successively at the big leap high tower of 500kV Hang Lan line, the big leap high tower in 500kV Qianjiang-the Changjiang river, Xianning, the big leap high tower in three Jiangkous, Nanjing, the big leap high tower in the Yellow River, the big engineering constructions such as high tower, 500kV platform south allosteric support, the eastern allosteric support of 500kV temperature of crossing over of 220kV Zhoushan networking, quality meets design and code requirement to present embodiment.
With reference to Fig. 4, Fig. 5, the flange 1 of present embodiment is an individual pen hole flange, is provided with bolt hole on the flange in the outside of described weld, is provided with the predeformation section on the flange in the outside of weld.
Described flange comprises front and back, and described front contacts with steel pipe, and the described back side is provided with the predeformation section.
All the other structures of present embodiment are identical with embodiment 1 with working procedure.
Claims (6)
1, a kind of predeformation structure of plane welding flange, comprise flange and steel pipe, the end of described steel pipe and flange welding, it is characterized in that: before welding, the part formation predeformation section of skew takes place to away from the skew of steel pipe direction in the geometrical center of the cross section of the part of the close weld of described flange.
2, predeformation structure of plane welding flange as claimed in claim 1 is characterized in that: described predeformation section is slope shape.
3, predeformation structure of plane welding flange as claimed in claim 1 or 2 is characterized in that: described flange is a Shuan Quan hole flange, is provided with bolt hole on the flange of the both sides of described weld, is equipped with the predeformation section on the flange of the both sides of weld.
4, predeformation structure of plane welding flange as claimed in claim 3 is characterized in that: described flange comprises front and back, and described front contacts with steel pipe, and the described front or the back side are provided with the predeformation section.
5, predeformation structure of plane welding flange as claimed in claim 1 or 2 is characterized in that: described flange is an individual pen hole flange, is provided with bolt hole on the flange in the outside of described weld, is provided with the predeformation section on the flange in the outside of weld.
6, predeformation structure of plane welding flange as claimed in claim 4 is characterized in that: described flange comprises front and back, and described front contacts with steel pipe, and the described back side is provided with the predeformation section.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100612587A CN101251211A (en) | 2008-03-20 | 2008-03-20 | Predeformation structure of plane welding flange |
| PCT/CN2009/070901 WO2009115050A1 (en) | 2008-03-20 | 2009-03-20 | Plane-welding flange pre-deforming mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100612587A CN101251211A (en) | 2008-03-20 | 2008-03-20 | Predeformation structure of plane welding flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101251211A true CN101251211A (en) | 2008-08-27 |
Family
ID=39954742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100612587A Pending CN101251211A (en) | 2008-03-20 | 2008-03-20 | Predeformation structure of plane welding flange |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101251211A (en) |
| WO (1) | WO2009115050A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009115050A1 (en) * | 2008-03-20 | 2009-09-24 | 浙江盛达铁塔有限公司 | Plane-welding flange pre-deforming mechanism |
| CN102319942A (en) * | 2011-09-05 | 2012-01-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Titanium alloy welded case installation edge pre-deformation welding and micro forming method |
| CN105108369A (en) * | 2015-09-14 | 2015-12-02 | 无锡市创新化工设备有限公司 | Structure and welding method capable of preventing welding deformation of flange |
| CN106346156A (en) * | 2016-10-26 | 2017-01-25 | 杨才军 | Method for controlling deformation of water chamber of condenser in manufacturing |
| CN106984919A (en) * | 2017-03-06 | 2017-07-28 | 无锡威孚力达催化净化器有限责任公司 | With the processing method of predeformation method control flange flatness |
| CN108291675A (en) * | 2015-12-01 | 2018-07-17 | 德国美力有限两合公司 | Method for manufacturing flange blank and flange |
| CN110076505A (en) * | 2019-04-28 | 2019-08-02 | 沈阳透平机械股份有限公司 | A kind of method of controlled level flange angular deformation |
| CN111889953A (en) * | 2020-07-30 | 2020-11-06 | 哈尔滨锅炉厂有限责任公司 | Flange connecting pipe welding positioning device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69123673T2 (en) * | 1990-09-17 | 1997-06-12 | Hitachi Ltd | Metal container with stem and branch pipe and its manufacturing process. |
| JP2005088048A (en) * | 2003-09-17 | 2005-04-07 | Toshiba Plant Systems & Services Corp | Flange for absorbing welding deformation for piping joint, and piping joint using the same |
| CN101251211A (en) * | 2008-03-20 | 2008-08-27 | 浙江盛达铁塔有限公司 | Predeformation structure of plane welding flange |
-
2008
- 2008-03-20 CN CNA2008100612587A patent/CN101251211A/en active Pending
-
2009
- 2009-03-20 WO PCT/CN2009/070901 patent/WO2009115050A1/en active Application Filing
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009115050A1 (en) * | 2008-03-20 | 2009-09-24 | 浙江盛达铁塔有限公司 | Plane-welding flange pre-deforming mechanism |
| CN102319942A (en) * | 2011-09-05 | 2012-01-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Titanium alloy welded case installation edge pre-deformation welding and micro forming method |
| CN105108369A (en) * | 2015-09-14 | 2015-12-02 | 无锡市创新化工设备有限公司 | Structure and welding method capable of preventing welding deformation of flange |
| CN108291675A (en) * | 2015-12-01 | 2018-07-17 | 德国美力有限两合公司 | Method for manufacturing flange blank and flange |
| CN108291675B (en) * | 2015-12-01 | 2020-06-23 | 德国美力有限两合公司 | Method for producing a flange blank and a flange |
| US11060641B2 (en) | 2015-12-01 | 2021-07-13 | Minimax Gmbh & Co. Kg | Method for producing a flange blank and for producing a flange |
| CN106346156A (en) * | 2016-10-26 | 2017-01-25 | 杨才军 | Method for controlling deformation of water chamber of condenser in manufacturing |
| CN106984919A (en) * | 2017-03-06 | 2017-07-28 | 无锡威孚力达催化净化器有限责任公司 | With the processing method of predeformation method control flange flatness |
| CN110076505A (en) * | 2019-04-28 | 2019-08-02 | 沈阳透平机械股份有限公司 | A kind of method of controlled level flange angular deformation |
| CN111889953A (en) * | 2020-07-30 | 2020-11-06 | 哈尔滨锅炉厂有限责任公司 | Flange connecting pipe welding positioning device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009115050A1 (en) | 2009-09-24 |
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Open date: 20080827 |