CN107243704A - The welding manufacture process of large-scale all-welded structure ball valve of water turbine - Google Patents
The welding manufacture process of large-scale all-welded structure ball valve of water turbine Download PDFInfo
- Publication number
- CN107243704A CN107243704A CN201710666156.7A CN201710666156A CN107243704A CN 107243704 A CN107243704 A CN 107243704A CN 201710666156 A CN201710666156 A CN 201710666156A CN 107243704 A CN107243704 A CN 107243704A
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- valve
- welding
- valve body
- ball valve
- rotation
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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
- B23K31/02—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Taps Or Cocks (AREA)
- Prostheses (AREA)
Abstract
The present invention discloses a kind of welding manufacture process of large-scale all-welded structure ball valve of water turbine.It is the innovation in large-scale all-welded structure ball valve of water turbine erection welding process, is the change of manufacture method substantially.The process program that the present invention uses and heat resistance paint is applied before welding aid axle sleeve, valve and valve body single-piece welding equipment, is symmetrically welded when rotating valve in vertical position of welding is first Application, use the process of the present invention, greatly improve access for welding and operability, effectively control welding deformation, centre flaw detection ensure that the quality of ball valve weld seam, ball valve critical size stability is ensure that, large-scale all-welded structure ball valve of water turbine erection welding quality is obviously improved.
Description
Technical field
The present invention relates to a kind of welding manufacture process of large-scale all-welded structure ball valve of water turbine.
Background technology
Large-scale water turbine ball valve body is divided into two valves or many valves, in the past using conjunction mode is constituted entirety, to sealing matter
Amount requires very high, for large-scale all-welded structure ball valve of water turbine, and valve loads after valve body and connected valve body by way of welding
An entirety is connected in, the country is without related manufacturing experience.The ball valve of all-welded structure have lightweight, overall performance it is good, sealing can
By the advantages of, but manufacturing process is more complicated, and is applied to such ball valve in turbine-generator units pressure pipeline, weldquality more
It is required that high.Weld seam form typically fills local maxima throat depth in weldering, construction joint using double groove can exceed 300mm,
Valve is loaded into valve body before weldering, need to repeatedly rotate valve could meet the welding of valve body diverse location, and weldering amount is big, operation difficulty
Greatly, weldquality and dimensional accuracy are difficult to ensure that, can not complete to manufacture using traditional erection welding technology.
The content of the invention
It is an object of the invention to provide a kind of welding manufacture process of large-scale all-welded structure ball valve of water turbine, pass through
Rational procedure for preparation, welding manufacture technique, welding sequence, are equipped with scheme of rotation, reduce welding deformation, reduce residual stress,
Weld crack is avoided, workpiece quality is improved.The technical scheme is that：
1) valve body (1), valve (2) are got the raw materials ready：By drawing, the valve body of two valves is manufactured using the method for casting and processing
(1) and overall valve (2), valve body (1) is the two-sided U-shaped welding groove of the overall post-processing commissure of synthesis；
2) valve body (1), bearing (3) packing weldering：Valve body (1) and bearing (3) are assembled together by drawing, and carried out
It is welded and fixed；
3) valve body (1), valve (2) apply heat resistance paint：Valve body (1) and valve (2) single-piece to welding equipment bearing (3) spray
Sand, cleaning, apply heat resistance paint and are protected, and carry out Low Temperature Heat Treatment；
4) overall assembling processing：Valve body (1) is assembled together with valve (2) by drawing, with processing valve body (1) with
Valve (2) matching surface, it is ensured that the coaxial accuracy between valve body (1) and valve (2)；
5) rotation and setting tool are installed：Rotation and setting tool are installed at valve body (1) and valve (2) matching surface,
Valve (2) end installation tool pivoted arm (4), rotation and fixation for valve in welding process (2)；
6) rotation valve (2) and welding：Ball valve is stood up, and flange is down, steady with buttress pad, rotation valve (2) to welding
Position and fixation, weld preheating are stood to more than 100 DEG C in the symmetric position of valve body (1) using gas metal-arc welding
Weldering welding, prior to the welding of big groove side, weld seam once welds 2~3 layers, and small groove side back chipping, inside and outside alternately welding rotates valve
(2) remaining position, is welded, valve (2) circulation is rotated several times and is soldered to completely, to not equal thickness connecting portion with weldering transition；
7) detected a flaw in the middle of：Throat thickness up to 394mm four flange angles (5) are taken increases by two when being welded to 1/2 thickness, 3/4 thickness
Secondary UT flaw detections；
8) stress relief annealing is handled：Ball valve is hung on annealing furnace with standing up position, steady valve body is padded respectively with buttress
(1) and valve (2), carry out eliminating stress processing by special annealing specification；
9) ball valve weldquality and dimensional tolerance are checked, completes the final processing of ball valve.
Technique effect：
Large-scale all-welded structure ball valve of water turbine volume is big, wide 4870mm, high 3820mm, gross weight 84.95t, valve body and work
Door assembly difficulty is big, and positioning and the axiality of valve body group pair require high, need to support tool shaft between curtain shaft and valve body axis hole
Set, the handling process after assembling need to keep positioning and the axiality of valve body group pair.
The present invention is applied to large-scale all-welded structure ball valve of water turbine.For large-scale water turbine ball valve, traditional handicraft can not
Ensure welding quality and dimensional tolerance.According to conventional process, ball valve body is welded into 1/2 circle to be divided into many valve structures
Afterwards, it is by flange face that synthesis is overall.But with greatly improving for water level elevation and the power of the assembling unit, hydraulic pressure increases in pipeline, right
Seal request increases, and such as according to traditional process, welding quality, dimensional tolerance and through-flow face quality are difficult to ensure that.
The present invention is the innovation in large-scale all-welded structure ball valve of water turbine erection welding process, is manufacture method sheet
Change in matter.Using the process of the present invention, ball valve entirety erection welding size can be effectively ensured.Design and produce instrument
Axle sleeve, makes it meet rotating requires of the valve in valve body in production process, while playing a part of positioning after valve is rotated, protects
Demonstrate,prove accessibility, symmetry and the security of welding.
The present invention is protected using applying heat resistance paint in inner and outer surfaces before valve and valve body single-piece welding equipment, and by single-piece
Low Temperature Heat Treatment is carried out, makes coating surface film curing, through-flow face dead angle area surface after integral solder annealing is effectively prevent
Protection by paints and lacquers can not be carried out.
The present invention rotation and weld process replace traditional welding technique, make access for welding and operation
Property greatly improve, effectively control welding deformation, centre flaw detection ensure that the quality of ball valve weld seam, it is ensured that ball valve critical size is steady
Qualitative, large-scale all-welded structure ball valve of water turbine erection welding quality is obviously improved.
Brief description of the drawings
Fig. 1 is the structural scheme of mechanism of large-scale all-welded structure ball valve of water turbine.
Fig. 2 is the process schematic diagram of large-scale all-welded structure ball valve of water turbine.
Embodiment
The present invention provides a kind of assembling weldering of a kind of tolerance for ensureing large-scale all-welded structure ball valve of water turbine and quality
Connect method of manufacturing technology.The technical scheme is that：
1) valve body 1, valve 2 are got the raw materials ready：By drawing, two clack valve bodies 1 are manufactured and overall using the method for casting and processing
Valve 2, valve body 1 is the two-sided U-shaped welding groove of the overall post-processing commissure of synthesis；
2) valve body 1, the packing weldering of bearing 3：Valve body 1 and bearing 3 are assembled together by drawing, and carry out welding solid
It is fixed；
3) valve body 1, valve 2 apply heat resistance paint：Valve body 1 and the single-piece of valve 2 to welding equipment bearing 3 carry out sandblasting, cleaning, apply
Heat resistance paint is protected, and carries out Low Temperature Heat Treatment；
4) overall assembling processing：Valve body 1 is assembled together with valve 2 by drawing, with processing valve body 1 and valve 2
Matching surface, it is ensured that the coaxial accuracy between valve body 1 and valve 2；
5) rotation and setting tool are installed：Rotation and setting tool, valve 2 are installed at valve body 1 and the matching surface of valve 2
End installation tool pivoted arm 4, rotation and fixation for valve in welding process 2；
6) rotation valve 2 and welding：Ball valve is stood up, and flange is down, steady with buttress pad, rotation valve 2 to welding position
And it is fixed, weld preheating uses gas metal-arc welding to carry out vertical position welding welding to more than 100 DEG C in the symmetric position of valve body 1,
Prior to the welding of big groove side, weld seam once welds 2~3 layers, and small groove side back chipping, inside and outside alternately welding rotates valve 2, welds it
Remaining position, rotates the circulation of valve 2 and is soldered to completely, to not equal thickness connecting portion with weldering transition several times；
7) detected a flaw in the middle of：Throat thickness up to 394mm four flange angles 5 are taken to be increased twice when being welded to 1/2 thickness, 3/4 thickness
UT detects a flaw；
8) stress relief annealing is handled：Ball valve is hung on annealing furnace with standing up position, steady valve body 1 is padded respectively with buttress
With valve 2, carry out eliminating stress processing by special annealing specification；
9) ball valve weldquality and dimensional tolerance are checked, completes the final processing of ball valve.
It is as shown in Figure 1 large-scale all-welded structure ball valve of water turbine structural representation, whole ball valve is by valve body 1, the and of valve 2
Bearing 3 is constituted.
It is illustrated in figure 2 present invention process Method And Principle schematic diagram.To ensure the weld seam operability of valve body 1, welding
Journey, rotates pivoted arm 4, realizes the welding to the weld seam of valve body 1.Flange angle 5 carries out middle flaw detection.
Equipment need to be used：
● consumable electrode gas-shielded welder
● spirit level
● sample is rushed
● plummet
● ruler
● the high buttresses of 500mm
● instrument pivoted arm 4
● instrument axle sleeve
● rotary block
● pin block
● annealing furnace
● crane
Concrete technology step：
● valve body 1 is got the raw materials ready：Valve body 1 is two valve structures, and using casting, material is ZG20SiMn, the overall post-processing of synthesis
The two-sided U-shaped welding groove of commissure；
● valve 2 is got the raw materials ready：Valve 2 uses single-casting, and material is ZG20SiMn, processes appearance profile；
● valve body 1, the packing weldering of bearing 3：Valve body 1 and bearing 3 are assembled together by drawing, and carry out welding solid
It is fixed；
● valve body 1, valve 2 apply heat resistance paint：Valve body 1 and the single-piece of valve 2 to welding equipment bearing 3 carry out sandblasting, cleaning, apply
700 DEG C of aluminium powder organosilicon fire-resistant paint are protected, and valve body 1, valve 2 are carried out into Low Temperature Heat Treatment, make coating surface paint
Film solidifies；
● overall assembling processing：Valve body 1 is assembled together with valve 2, with processing valve body 1 and the matching surface of valve 2, protected
Demonstrate,prove the coaxial accuracy between valve body 1 and valve 2；
● rotation and setting tool are installed：Rotation and setting tool are installed at valve body 1 and the matching surface of valve 2, rotated
Rubbing surface is embedded in brasses, prevents locking, the end installation tool pivoted arm 4 of valve 2, for valve in welding process 2 rotation with it is solid
It is fixed；
● rotation valve 2 and welding：Ball valve is stood up, and flange is down, steady with buttress pad, passes through crane lifting tool pivoted arm
4 ends, rotation valve 2 makes its outlet pass normal and horizontal line angle at 45 °, with pin block and block card mother-tool axle sleeve, realizes solid
Determine valve 2, weld preheating uses gas metal-arc welding to carry out vertical position welding, first to more than 100 DEG C in the symmetric position of valve body 1
Welded in big groove side, weld seam once welds 2~3 layers, and valve 2 is rotated by 90 ° by small groove side back chipping, inside and outside alternately welding,
Remaining position is welded, the circulation welding of valve 2 is rotated several times, small groove side weld is welded to the 1/2 of groove depth, then by big slope
Mouth side is welded to the 3/4 of groove depth, and small groove side then is welded into full, big groove side finally is welded into full, to not equal thickness connecting portion
Position is with weldering transition；
● centre flaw detection：Throat thickness up to 394mm four flange angles 5 are taken to be increased twice when being welded to 1/2 thickness, 3/4 thickness
UT detects a flaw；
● stress relief annealing is handled：Ball valve is hung on annealing furnace with standing up position, steady valve body 1 is padded respectively with buttress
With valve 2, carry out eliminating stress processing by special annealing process specification；
● ball valve weldquality and dimensional tolerance are checked, the final processing of ball valve is completed.
The present invention is the innovation in large-scale all-welded structure ball valve of water turbine erection welding process, is manufacture method sheet
Change in matter.Heat resistance paint is applied before present invention welding aid axle sleeve, valve 2 and the single-piece welding equipment of valve body 1, is stood when rotating
The process program of weldering is first Application, is created according to this ball-valve structure.Using the process of the present invention, make welding reachable
Property and operability greatly improve, effectively control welding deformation, centre flaw detection ensure that the quality of ball valve weld seam, it is ensured that ball valve is closed
Key dimensional stability, large-scale all-welded structure ball valve of water turbine erection welding quality is obviously improved.
Claims (1)
1. a kind of welding manufacture process of large-scale all-welded structure ball valve of water turbine, it is characterized in that：
1) valve body (1), valve (2) are got the raw materials ready：By drawing, using casting and processing method manufacture two valves valve body (1) and
Overall valve (2), valve body (1) is the fixed integral two-sided U-shaped welding groove of post-processing commissure of conjunction；
2) valve body (1), bearing (3) packing weldering：Valve body (1) and bearing (3) are assembled together by drawing, and welded
It is fixed；
3) valve body (1), valve (2) apply heat resistance paint：Valve body (1) to welding equipment bearing (3) and valve (2) single-piece carry out sandblasting,
Cleaning, applies heat resistance paint and is protected, and carry out Low Temperature Heat Treatment；
4) overall assembling processing：Valve body (1) is assembled together with valve (2) by drawing, with processing valve body (1) and valve
(2) matching surface, it is ensured that the coaxial accuracy between valve body (1) and valve (2)；
5) rotation and setting tool are installed：Rotation and setting tool, valve are installed at valve body (1) and valve (2) matching surface
(2) end installation tool pivoted arm (4), rotation and fixation for valve in welding process (2)；
6) rotation valve (2) and welding：Ball valve is stood up, and flange is down, steady with buttress pad, rotation valve (2) to welding position
And it is fixed, weld preheating uses gas metal-arc welding to carry out vertical position welding weldering to more than 100 DEG C in the symmetric position of valve body (1)
Connect, prior to the welding of big groove side, weld seam once welds 2~3 layers, small groove side back chipping, inside and outside alternately welding, rotation valve (2), weldering
Remaining position is connect, valve (2) circulation is rotated several times and is soldered to completely, to not equal thickness connecting portion with weldering transition；
7) detected a flaw in the middle of：Throat thickness up to 394mm four flange angles (5) are taken increases UT twice when being welded to 1/2 thickness, 3/4 thickness
Flaw detection；
8) stress relief annealing is handled：Ball valve is hung on annealing furnace with standing up position, padded respectively with buttress steady valve body (1) and
Valve (2), is carried out eliminating stress processing by special annealing specification；
9) ball valve weldquality and dimensional tolerance are checked, completes the final processing of ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710666156.7A CN107243704B (en) | 2017-08-07 | 2017-08-07 | The welding manufacture process of large-scale all-welded structure ball valve of water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710666156.7A CN107243704B (en) | 2017-08-07 | 2017-08-07 | The welding manufacture process of large-scale all-welded structure ball valve of water turbine |
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| Publication Number | Publication Date |
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| CN107243704A true CN107243704A (en) | 2017-10-13 |
| CN107243704B CN107243704B (en) | 2019-03-15 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110977219A (en) * | 2019-12-13 | 2020-04-10 | 哈尔滨电机厂有限责任公司 | Pumped storage seat ring assembling and welding method |
| WO2020254680A1 (en) | 2019-06-20 | 2020-12-24 | Broen Poland Sp.Z.O.O. | A method for making a ball valve for regulating a fluid, a ball valve and a welding tool for holding and handling valve parts |
| CN113204851A (en) * | 2021-06-07 | 2021-08-03 | 中国核动力研究设计院 | Tolerance optimization method for all-welded assembly |
| CN113798629A (en) * | 2021-09-07 | 2021-12-17 | 东方电气集团东方电机有限公司 | Valve shaft groove structure of valve, valve shaft of valve, welding method and welding system |
| CN116160167A (en) * | 2023-04-24 | 2023-05-26 | 四川滕洋智能科技有限公司 | Multi-structure valve body welding machine and welding method |
| RU2815842C2 (en) * | 2019-06-20 | 2024-03-22 | Броэн А/С | Method for manufacturing ball valve for fluid regulation, ball valve and welding tool for holding and manipulating valve parts |
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| CN105149803A (en) * | 2015-09-25 | 2015-12-16 | 杭州力源发电设备有限公司 | Welding device applied to fully-welded ball valve body and welding technology of welding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020254680A1 (en) | 2019-06-20 | 2020-12-24 | Broen Poland Sp.Z.O.O. | A method for making a ball valve for regulating a fluid, a ball valve and a welding tool for holding and handling valve parts |
| CN114728379A (en) * | 2019-06-20 | 2022-07-08 | 布罗恩股份公司 | Method for producing a ball valve for conditioning a fluid, ball valve and welding tool for holding and actuating a valve element |
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| CN114728379B (en) * | 2019-06-20 | 2024-04-05 | 布罗恩股份公司 | Method for producing a ball valve for regulating a fluid, a ball valve and a welding tool for holding and actuating a valve element |
| CN110977219A (en) * | 2019-12-13 | 2020-04-10 | 哈尔滨电机厂有限责任公司 | Pumped storage seat ring assembling and welding method |
| CN113204851A (en) * | 2021-06-07 | 2021-08-03 | 中国核动力研究设计院 | Tolerance optimization method for all-welded assembly |
| CN113204851B (en) * | 2021-06-07 | 2022-02-11 | 中国核动力研究设计院 | Tolerance optimization method for all-welded assembly |
| CN113798629A (en) * | 2021-09-07 | 2021-12-17 | 东方电气集团东方电机有限公司 | Valve shaft groove structure of valve, valve shaft of valve, welding method and welding system |
| CN113798629B (en) * | 2021-09-07 | 2023-02-03 | 东方电气集团东方电机有限公司 | Valve shaft groove structure of valve, valve shaft of valve and welding system |
| CN116160167A (en) * | 2023-04-24 | 2023-05-26 | 四川滕洋智能科技有限公司 | Multi-structure valve body welding machine and welding method |
| CN116160167B (en) * | 2023-04-24 | 2023-07-14 | 四川滕洋智能科技有限公司 | Multi-structure valve body welding machine and welding method |
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|---|---|
| CN107243704B (en) | 2019-03-15 |
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