CN103008851A - All-welded ball valve body weld narrow-gap welding process and interface structure - Google Patents
All-welded ball valve body weld narrow-gap welding process and interface structure Download PDFInfo
- Publication number
- CN103008851A CN103008851A CN2012105441942A CN201210544194A CN103008851A CN 103008851 A CN103008851 A CN 103008851A CN 2012105441942 A CN2012105441942 A CN 2012105441942A CN 201210544194 A CN201210544194 A CN 201210544194A CN 103008851 A CN103008851 A CN 103008851A
- Authority
- CN
- China
- Prior art keywords
- valve body
- weld
- welding
- welded ball
- weld groove
- Prior art date
- 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.)
- Granted
Links
Images
Landscapes
- Arc Welding In General (AREA)
Abstract
The invention discloses a welding process and particularly relates to an all-welded ball valve body weld narrow-gap welding process. The all-welded ball valve body weld narrow-gap welding process which is provided by invention and can prevent heat from being accumulated and damaging/burning out a sealing element on a valve seat supporting ring comprises the following steps of: A) making a weld groove between a valve body and a left body, wherein the weld groove is U-shaped; B) selecting welding materials according to the chemical components and the mechanical properties of the valve body and the left body; C) before welding, preheating the valve body and the left body by adopting a flame heating method to enable the temperature of the valve body and the left body to reach 80-100DEG C; and D) after preheating, conducting multilayer multi-pass welding. Since the U-shaped weld groove is adopted, the weld groove is narrower, the filling volume of the weld between the valve body and the left body is ensured to be small, the heat-affected zone of the weld is smaller and the influence of the finally accumulated heat during welding on the sealing element on the valve seat supporting ring is minimized.
Description
Technical field
The present invention relates to a kind of welding procedure, especially a kind of all-welded ball valve valve body weld seam narrow gap welding technology.In addition, the invention still further relates to a kind of welding junction structure, especially a kind of all-welded ball valve valve body weld seam narrow gap welding interface structure.
Background technology
Generally speaking, for increasing work efficiency, the weld seam of all-welded ball valve is mainly adopted automatic/semi-automatic submerged-arc welding, have efficient high, the advantage such as fusion penetration is large, and welding joint mechanical property is reliable.For the weld seam between valve body and the left body, because the valve body wall thickness rate is thicker, according to conventional method design welding line joint groove, conventional welding line joint groove is V-shaped, and as shown in Figure 2, the volume that need to fill of valve body welding line joint is just larger so, weld interval can be long, the heat of valve in welding process finally accumulation can damage/burn seal on the valve seat bracing ring, thereby the sealing property of valve is affected, even loses efficacy.If but the final accumulation of the heat in the consideration welding process must cause the valve volume to increase on the impact of the seal on the valve seat bracing ring, manufacturing cost increases.
Summary of the invention
Technical problem to be solved by this invention provides a kind of all-welded ball valve valve body weld seam narrow gap welding technology of avoiding accumulation of heat to damage/burn seal on the valve seat bracing ring.
The present invention solves the all-welded ball valve valve body weld seam narrow gap welding technology that its technical problem adopts, and may further comprise the steps:
Weld groove between A, making valve body and the left body, weld groove takes the shape of the letter U;
B, according to the chemical composition of valve body and left body and the selected wlding of mechanical property;
C, before welding, adopt mode preheating valve body and the left body of flame heating, make its temperature reach 80～100 ℃;
D, after preheating is complete, carry out multi-layer multi-pass welding.
Further be in the D step, to adopt automatic/semi-automatic submerged-arc welding to weld.
Further be that multi-layer multi-pass welding adopts the following table parameter:
Further be, the sidewall of described U-shaped weld groove and the angle of its symmetrical center line are 1～5 °, and described U-shaped weld groove is to the symmetrical center line outer incline.
Further be that the sidewall of described U-shaped weld groove and the angle of its symmetrical center line are 2 °.
Another technical problem that will solve of the present invention provides a kind of all-welded ball valve valve body weld seam narrow gap welding interface structure of avoiding accumulation of heat to damage/burn seal on the valve seat bracing ring.
All-welded ball valve valve body weld seam narrow gap welding interface structure provided by the invention comprises valve body and left body, and valve body and left body complement each other to form weld groove, and the bottom centre place of weld groove is provided with at the bottom of the square weld seam, and described weld groove takes the shape of the letter U.Can adopt the gap and 1.5 of following size: 2mm at the bottom of the square weld seam
+ 0.5Root face.
Further be, the sidewall of described U-shaped weld groove and the angle of its symmetrical center line are 1～5 °, and described U-shaped weld groove is to the symmetrical center line outer incline.
Further be that the sidewall of described U-shaped weld groove and the angle of its symmetrical center line are 2 °.
The invention has the beneficial effects as follows: owing to having adopted the U-shaped weld groove, therefore weld groove is narrower, thereby the packing volume that has guaranteed the weld seam between valve body and the left body is less, weld heat-affected zone is less, the final accumulation of heat in the welding process is minimum on the impact of the seal on the valve seat bracing ring, when guaranteeing welding quality and valve function integrality, it is minimum that the volume of valve reaches, and manufacturing cost is minimum.Simultaneously, before welding preheating valve body and left body, therefore can make valve body and left body reach rapidly welding temperature, reduce the thermograde of valve body and left body in the welding process, in order to guarantee valve body and left body interior tissue in the situation that affected by welding heat to change less, guarantee simultaneously in the situation that reduce still can carry out good welding with cross-ventilation, accumulation of heat.
Description of drawings
Fig. 1 is the schematic diagram of welding junction structure of the present invention;
Fig. 2 is the schematic diagram of prior art welding junction structure;
Parts, position and numbering among the figure: valve body 1, left body 2, weld groove 3, weld seam A/F W.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
The present invention includes following steps:
Weld groove 3 between A, making valve body 1 and the left body 2, weld groove 3 takes the shape of the letter U; Weld groove 3 generally processes when processing valve body 1 and pedestal 2, and its concrete shape can be referring to shown in the accompanying drawing 1, and the cross sectional shape of weld groove 3 takes the shape of the letter U, and its bottom has the center to be provided with at the bottom of the square weld seam.
B, according to valve body 1 chemical composition and the selected wlding of mechanical property with left body 2; Select correct wlding can improve weld strength.
C, before welding, adopt the mode preheating valve body 1 and left body 2 of flame heating, make its temperature reach 80～100 ℃; Preheating can make valve body 1 and left body 2 reach fast welding temperature when welding, and guarantees welding quality.
D, after preheating is complete, carry out multi-layer multi-pass welding.Welding is general adopts automatic/semi-automatic submerged-arc welding to weld.
Concrete, the angle a of the sidewall of described U-shaped weld groove 3 and its symmetrical center line is 1～5 °, described U-shaped weld groove 3 is to the symmetrical center line outer incline.Preferred angle a is 2 °.The opening of U-shaped weld groove 3 is less times greater than the bottom, and so more easily operation when welding is convenient to the bottom weldering full.Less angle can be not too much yet increase welding packing volume.
Embodiment
Take certain model high-pressure heavy caliber all-welded as example, its weld groove 3 is set to the U-shaped weld seam, and a is 2 °, and weld seam A/F W width numerical value is determined according to throat depth, the general large weld seam of 100mm thickness, and the W width value is about 22mm.General requirement be root of weld width greatly in 13～15mm scope, groove root weld quality safety can suitably be regulated a value (angle) reliably according to concrete welding situation when guaranteeing welding, regulates weld width.Its main material chemical composition and mechanical property such as following table:
According to chemical composition and the mechanical property of above mother metal, determine to adopt automatic submerged arc welding to weld, select wlding GB/T5293F5A4-H10Mn2
80～100 ℃ of the mode preheat temperatures of employing flame heating.
Weld welding parameter such as following table after the preheating
After welding is complete, according to predetermined welding procedure weld finish after, carry out Product Validation.Product Validation carries out according to the GB of valve.The properties of product of this routine product see the following form:
Weld defect is not found in the weld seam process UT Non-Destructive Testing of adopting this routine welding procedure welding to finish, is judged to be the I level qualified.The conventional pressure integrity test of whole valve also is qualified.
Can find out from this example, adopt technique of the present invention and structure can reduce the packing volume of weld seam, reduce accumulation of heat; And its valve of producing meets the requirements fully.
Claims (8)
1. all-welded ball valve valve body weld seam narrow gap welding technology is characterized in that: may further comprise the steps:
Weld groove (3) between A, making valve body (1) and the left body (2), weld groove (3) takes the shape of the letter U;
B, according to chemical composition and the selected wlding of mechanical property of valve body (1) and left body (2);
C, before welding, adopt the mode preheating valve body (1) and left body (2) of flame heating, make its temperature reach 80～100 ℃;
D, after preheating is complete, carry out multi-layer multi-pass welding.
2. all-welded ball valve valve body weld seam narrow gap welding technology as claimed in claim 1 is characterized in that: in the D step, adopt automatic/semi-automatic submerged-arc welding to weld.
3. all-welded ball valve valve body weld seam narrow gap welding technology as claimed in claim 2 is characterized in that: multi-layer multi-pass welding adopts the following table parameter:
4. all-welded ball valve valve body weld seam narrow gap welding technology as claimed in claim 1, it is characterized in that: the sidewall of described U-shaped weld groove (3) and the angle a of its symmetrical center line are 1～5 °, and described U-shaped weld groove (3) is to the symmetrical center line outer incline.
5. all-welded ball valve valve body weld seam narrow gap welding technology as claimed in claim 4, it is characterized in that: the sidewall of described U-shaped weld groove (3) and the angle a of its symmetrical center line are 2 °.
6. all-welded ball valve valve body weld seam narrow gap welding interface structure, comprise valve body (1) and left body (2), valve body (1) and left body (2) complement each other to form weld groove (3), the bottom centre place of weld groove (3) is provided with at the bottom of the square weld seam, and it is characterized in that: described weld groove (3) takes the shape of the letter U.
7. all-welded ball valve valve body weld seam narrow gap welding interface structure as claimed in claim 6, it is characterized in that: the sidewall of described U-shaped weld groove (3) and the angle a of its symmetrical center line are 1～5 °, and described U-shaped weld groove (3) is to the symmetrical center line outer incline.
8. all-welded ball valve valve body weld seam narrow gap welding interface structure as claimed in claim 7, it is characterized in that: the sidewall of described U-shaped weld groove (3) and the angle a of its symmetrical center line are 2 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210544194.2A CN103008851B (en) | 2012-12-14 | 2012-12-14 | All-welded ball valve body weld narrow-gap welding process and interface structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210544194.2A CN103008851B (en) | 2012-12-14 | 2012-12-14 | All-welded ball valve body weld narrow-gap welding process and interface structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103008851A true CN103008851A (en) | 2013-04-03 |
| CN103008851B CN103008851B (en) | 2015-04-15 |
Family
ID=47958258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210544194.2A Active CN103008851B (en) | 2012-12-14 | 2012-12-14 | All-welded ball valve body weld narrow-gap welding process and interface structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103008851B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982673A (en) * | 2014-05-29 | 2014-08-13 | 昆山维萨阀门有限公司 | All-welded ball valve |
| CN105618904A (en) * | 2016-02-23 | 2016-06-01 | 中信重工机械股份有限公司 | Narrow-gap submerged-arc welding groove structure of large thick-wall oil cylinder and assembling and welding method |
| CN105921871A (en) * | 2016-06-03 | 2016-09-07 | 江苏威尔迪威阀业有限公司 | Integrated molding welding method of large-caliber all-welded ball valve |
| CN106232279A (en) * | 2014-01-24 | 2016-12-14 | 电力研究所有限公司 | Stepped design welding line joint groove |
| CN106552985A (en) * | 2015-09-29 | 2017-04-05 | 嘉兴五洲阀门有限公司 | A kind of welding procedure of valve neck seat angle welding |
| CN106881518A (en) * | 2015-12-15 | 2017-06-23 | 嘉兴五洲阀门有限公司 | A kind of welding procedure of valve body circumferential welded seam |
| CN107725626A (en) * | 2017-10-31 | 2018-02-23 | 镇江索达联轴器有限公司 | A kind of diaphragm coupling of the adapter with radial positioning |
| CN110508916A (en) * | 2019-08-20 | 2019-11-29 | 东方电气集团东方汽轮机有限公司 | The electro-beam welding joint structure and its welding method of spherical cabin equator seam |
| EP4079447A4 (en) * | 2019-12-18 | 2024-01-24 | Andritz China Ltd | Prefabricated yankee cylinder section and manufacturing method for yankee cylinder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714978A (en) * | 2004-06-30 | 2006-01-04 | 上海锅炉厂有限公司 | Process and device for automatic argon arc welding and narrow gap burial arc welding for circular pipe header seam |
| CN101352785A (en) * | 2007-07-23 | 2009-01-28 | 上海重型机器厂有限公司 | Method for welding pressing sleeve of large-sized hydraulic press |
| CN101433989A (en) * | 2008-12-18 | 2009-05-20 | 天津钢管集团股份有限公司 | Method for welding cold-expansion tube production line draw rod |
| CN102009251A (en) * | 2010-11-25 | 2011-04-13 | 新疆石油工程建设有限责任公司 | Full-position welding method for pipeline by full-automatic external welding machine |
| CN102363239A (en) * | 2011-09-28 | 2012-02-29 | 克里特集团有限公司 | Automatic narrow-gap submerged arc welding process for all-welded fixed ball valve with medium and large calibers |
| CN202972110U (en) * | 2012-12-14 | 2013-06-05 | 四川精控阀门制造有限公司 | All-welded ball valve body weld joint narrow gap welding connector structure |
-
2012
- 2012-12-14 CN CN201210544194.2A patent/CN103008851B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714978A (en) * | 2004-06-30 | 2006-01-04 | 上海锅炉厂有限公司 | Process and device for automatic argon arc welding and narrow gap burial arc welding for circular pipe header seam |
| CN101352785A (en) * | 2007-07-23 | 2009-01-28 | 上海重型机器厂有限公司 | Method for welding pressing sleeve of large-sized hydraulic press |
| CN101433989A (en) * | 2008-12-18 | 2009-05-20 | 天津钢管集团股份有限公司 | Method for welding cold-expansion tube production line draw rod |
| CN102009251A (en) * | 2010-11-25 | 2011-04-13 | 新疆石油工程建设有限责任公司 | Full-position welding method for pipeline by full-automatic external welding machine |
| CN102363239A (en) * | 2011-09-28 | 2012-02-29 | 克里特集团有限公司 | Automatic narrow-gap submerged arc welding process for all-welded fixed ball valve with medium and large calibers |
| CN202972110U (en) * | 2012-12-14 | 2013-06-05 | 四川精控阀门制造有限公司 | All-welded ball valve body weld joint narrow gap welding connector structure |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106232279A (en) * | 2014-01-24 | 2016-12-14 | 电力研究所有限公司 | Stepped design welding line joint groove |
| US10994361B2 (en) | 2014-01-24 | 2021-05-04 | Electric Power Research Institute, Inc. | Stepped design weld joint preparation |
| CN103982673A (en) * | 2014-05-29 | 2014-08-13 | 昆山维萨阀门有限公司 | All-welded ball valve |
| CN106552985A (en) * | 2015-09-29 | 2017-04-05 | 嘉兴五洲阀门有限公司 | A kind of welding procedure of valve neck seat angle welding |
| CN106881518A (en) * | 2015-12-15 | 2017-06-23 | 嘉兴五洲阀门有限公司 | A kind of welding procedure of valve body circumferential welded seam |
| CN105618904A (en) * | 2016-02-23 | 2016-06-01 | 中信重工机械股份有限公司 | Narrow-gap submerged-arc welding groove structure of large thick-wall oil cylinder and assembling and welding method |
| CN105618904B (en) * | 2016-02-23 | 2018-10-16 | 中信重工机械股份有限公司 | A kind of assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder |
| CN105921871A (en) * | 2016-06-03 | 2016-09-07 | 江苏威尔迪威阀业有限公司 | Integrated molding welding method of large-caliber all-welded ball valve |
| CN107725626A (en) * | 2017-10-31 | 2018-02-23 | 镇江索达联轴器有限公司 | A kind of diaphragm coupling of the adapter with radial positioning |
| CN110508916A (en) * | 2019-08-20 | 2019-11-29 | 东方电气集团东方汽轮机有限公司 | The electro-beam welding joint structure and its welding method of spherical cabin equator seam |
| CN110508916B (en) * | 2019-08-20 | 2021-07-16 | 东方电气集团东方汽轮机有限公司 | Electron beam welding joint structure of red channel joint of spherical cabin and welding method thereof |
| EP4079447A4 (en) * | 2019-12-18 | 2024-01-24 | Andritz China Ltd | Prefabricated yankee cylinder section and manufacturing method for yankee cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103008851B (en) | 2015-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103008851B (en) | All-welded ball valve body weld narrow-gap welding process and interface structure | |
| CN101239422A (en) | Small bevel angle full-automatic CO2 gas shielded welding and automatic submerged arc welding combined welding technique | |
| CN103624376B (en) | Method for butt welding end parts of two double-metal composite pipes respectively with adapter ring on the end part | |
| CN204975757U (en) | Thick wall is taken over and is ridden a formula one side welding welding groove | |
| CN102581431B (en) | All-position welding method for single-arc double-wire pipeline | |
| CN102363239B (en) | Automatic narrow-gap submerged arc welding process for all-welded fixed ball valve with medium and large calibers | |
| CN105436673A (en) | Automatic welding process for Invar die steel | |
| CN100464919C (en) | 45 DEG all-position back-sealing butt welding method for pipe with small diameter | |
| CN104002029B (en) | A kind of improved flat board butt joint submerged-arc welding | |
| CN112719659A (en) | Method for directly butt welding iron cupronickel and stainless steel pipe fitting without gap | |
| CN103433697B (en) | A kind of marine engineering equipment heavy wall beam column welding procedure | |
| CN105127568A (en) | Double-metal composite tube welding technique | |
| CN103692060A (en) | Welding method of CO2 gas shielded welding for solid welding wire with diameter of phi 1.6 | |
| CN102390002B (en) | Automatic submerged-arc welding method for large insertion-type adapting pipe on cone | |
| CN103962694A (en) | Small-cylinder-diameter-ratio pipe connector submerged arc saddle-shaped automatic welding method | |
| CN101982287B (en) | Automatic welding method of nuclear island main pipes | |
| CN202972110U (en) | All-welded ball valve body weld joint narrow gap welding connector structure | |
| CN106475734B (en) | A kind of repair welding after tapped blind hole depth is overproof | |
| CN103752994A (en) | Circular seam welding process of thin-wall container | |
| CN102380693B (en) | Section butt welding method | |
| CN102581432B (en) | Single-arc twin-wire pipeline all-position welding method | |
| CN105710488A (en) | Welding process | |
| CN103357994A (en) | Semi-automatic backing welding method for consumable electrode of stainless steel gasket of aluminum alloy plate | |
| CN104772551B (en) | Rubber film sealing coal gas cabinet bottom plate or top plate welding method | |
| CN104014946B (en) | The bevel for welding structure of Z-type aluminium alloy extrusions butt weld and welding method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |