CN103862186A - Welding structure for electric heating element sleeves of pressurized water reactor nuclear power plant voltage stabilizer - Google Patents
Welding structure for electric heating element sleeves of pressurized water reactor nuclear power plant voltage stabilizer Download PDFInfo
- Publication number
- CN103862186A CN103862186A CN201210536608.7A CN201210536608A CN103862186A CN 103862186 A CN103862186 A CN 103862186A CN 201210536608 A CN201210536608 A CN 201210536608A CN 103862186 A CN103862186 A CN 103862186A
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- China
- Prior art keywords
- welding
- heating elements
- electrical heating
- power plant
- heating element
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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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
- B23K33/006—Filling of continuous seams for cylindrical workpieces
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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
-
- 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
- B23K2101/14—Heat exchangers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention belongs to pressurized water reactor nuclear power plant equipment and particularly relates to a welding structure for electric heating element sleeves of a pressurized water reactor nuclear power plant voltage stabilizer. Bosses are surfaced at positions of a voltage stabilizer lower end enclosure, where electric heating element sleeves are welded, and the upper surfaces of the bosses are perpendicular to the electric heating element sleeves. Axisymmetric grooves are opened in the bosses to be welded with the electric heating element sleeves. The welding structure has the advantages that the welding joint welding difficulty during fabrication can be reduced, deformation of the electric heating element sleeves during welding can be effectively prevented, and analyses show that the structure is capable of improving the stress state of the welding joints at the positions and reducing the risk of the failure of the welding joints during the operation of the power plant.
Description
Technical field
The invention belongs to a kind of compressed water reactor nuclear power plant, be specifically related to a kind of PWR nuclear power plant voltage-stablizer electrical heating elements Socket welding crack structure.
Background technology
PWR nuclear power plant voltage-stablizer bottom is provided with many electrical heating elements, and electrical heating elements is that the electrical heating elements by being arranged on lower seal head of voltage stabilizer stretches into voltage-stablizer inside.The overlay cladding of electrical heating elements sleeve pipe and lower seal head of voltage stabilizer inwall welds, and the pressure-bearing boundary that this weld seam is reactor coolant loop requires very high.
In PWR nuclear power plant, the sphere overlay cladding of electrical heating elements sleeve pipe and low head inwall directly welded in the past, because of electrical heating elements casing axis and overlay cladding inner wall surface out of plumb, there is certain welding difficulty, and at the deposited metal at electrical heating elements sleeve pipe and the each position of overlay cladding girth seam not etc., be difficult to control the post welding distortion of electrical heating elements sleeve pipe in manufacture process, thereby carry out risk to the mounting strap that penetrates smoothly of electrical heating elements.
Summary of the invention
The object of this invention is to provide a kind of stress state that can improve commissure, and can reduce the PWR nuclear power plant voltage-stablizer electrical heating elements Socket welding connecting structure of difficulty and risk in manufacture process.
The present invention is achieved in that a kind of PWR nuclear power plant voltage-stablizer electrical heating elements Socket welding connecting structure, and at the position built-up welding boss of lower seal head of voltage stabilizer welding electrical heating elements sleeve pipe, the upper surface of boss is vertical with the axis of electrical heating elements sleeve pipe.
Open axisymmetric groove at boss, weld with electrical heating elements sleeve pipe.
Advantage of the present invention is, this structure can reduce the welding difficulty of this weld seam in manufacture process, can effectively prevent the distortion of electrical heating elements sleeve pipe in welding process, and analysis shows, this structure can be improved the stress state of this place's weld seam, reduces power plant's this weld seam in service the risk losing efficacy occurs.
Brief description of the drawings
Fig. 1 is power plant's electrical heating elements Socket welding connecting structure schematic diagram in the past;
Fig. 2 is the enlarged drawing at A place in Fig. 1;
Fig. 3 is a kind of PWR nuclear power plant voltage-stablizer electrical heating elements Socket welding connecting structure schematic diagram provided by the present invention;
Fig. 4 is the enlarged drawing at B place in Fig. 3.
In figure, 1. voltage-stablizer electrical heating elements; 2. lower seal head of voltage stabilizer; 3. lower seal head of voltage stabilizer inner wall overlaying layer; 4. voltage-stablizer electrical heating elements sleeve pipe; 5. pressure-bearing angle welding; 6. electrical heating elements; 7. boss; 8. lower seal head of voltage stabilizer; 9. electrical heating elements sleeve pipe; 10. pressure-bearing angle welding.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail:
PWR nuclear power plant voltage-stablizer bottom is provided with many electrical heating elements, electrical heating elements is electric component, easily damage, for meeting possible maintenance and changing requirement, electrical heating elements generally stretches into voltage-stablizer inside by the electrical heating elements sleeve pipe being arranged on lower seal head of voltage stabilizer, and is connected (bolt connect or welding) with electrical heating elements sleeve pipe.Electrical heating elements sleeve pipe inserts voltage-stablizer through the perforate on lower seal head of voltage stabilizer, and welds by angle welding with the overlay cladding of voltage-stablizer inwall.
In power plant, be to adopt motor heat element sleeve pipe and overlay cladding directly to weld in the past, because voltage-stablizer inner wall overlaying layer is sphere, and electrical heating elements sleeve pipe quantity is many, the general surge ozzle periphery in voltage-stablizer bottom, arrange along three concentric circles, the axis of electrical heating elements sleeve pipe need be parallel with voltage-stablizer tubular axis, therefore casing axis does not overlap with the normal of its welding portion overlaying surface, must cause angle welding between electrical heating elements and overlay cladding along the deposited metal at the each position of sleeve circumferential not etc., as shown in Figure 1.Because this structure has certain welding difficulty, and the each position of sleeve circumferential deposited metal amount not etc. do not understood postwelding amount of contraction difference, thereby causes the welding deformation of electrical heating elements sleeve pipe welding position, affects passing smoothly of electrical heating elements sleeve pipe.And this structure can cause that the stress state of welding position is severe, and this angle welding belongs to the pressure boundary of reactor coolant loop, thereby bring certain risk to the safe operation of nuclear power plant.
As shown in Figures 3 and 4, a kind of PWR nuclear power plant voltage-stablizer electrical heating elements Socket welding connecting structure, in advance in the position built-up welding of lower seal head of voltage stabilizer welding electrical heating elements sleeve pipe 9 a whole circle boss 7(if three circle electrical heating elements will be installed, need built-up welding 3 to enclose boss), the upper surface of boss 7 is vertical with the axis of electrical heating elements sleeve pipe 9, can open axisymmetric groove at boss 7, weld with electrical heating elements sleeve pipe 9.This Welding Structure is identical along the deposited metal amount of sleeve circumferential, and welding is easy, and its welding deformation causing is easily controlled, and angle welding is axially symmetric structure, stressed evenly, stress state is better.
Claims (3)
1. a PWR nuclear power plant voltage-stablizer electrical heating elements Socket welding connecting structure, it is characterized in that: at the position built-up welding boss (7) of lower seal head of voltage stabilizer (8) welding electrical heating elements sleeve pipe (9), the upper surface of boss (7) is vertical with the axis of electrical heating elements sleeve pipe (9).
2. a kind of PWR nuclear power plant voltage-stablizer electrical heating elements Socket welding connecting structure as claimed in claim 1, is characterized in that: open axisymmetric groove at boss (7), weld with electrical heating elements sleeve pipe (9).
3. a kind of PWR nuclear power plant voltage-stablizer electrical heating elements Socket welding connecting structure as claimed in claim 1, is characterized in that: described boss (7) is whole coil structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210536608.7A CN103862186A (en) | 2012-12-13 | 2012-12-13 | Welding structure for electric heating element sleeves of pressurized water reactor nuclear power plant voltage stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210536608.7A CN103862186A (en) | 2012-12-13 | 2012-12-13 | Welding structure for electric heating element sleeves of pressurized water reactor nuclear power plant voltage stabilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103862186A true CN103862186A (en) | 2014-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210536608.7A Pending CN103862186A (en) | 2012-12-13 | 2012-12-13 | Welding structure for electric heating element sleeves of pressurized water reactor nuclear power plant voltage stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103862186A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098113A (en) * | 2016-07-28 | 2016-11-09 | 中国原子能科学研究院 | A kind of presurized water reactor reactor pressure vessel upper cover |
| CN109262204A (en) * | 2018-09-14 | 2019-01-25 | 中核核电运行管理有限公司 | A kind of a full set of technique of nuclear power plant's voltage-stablizer electrical heating elements scene replacement |
| CN111203669A (en) * | 2020-01-17 | 2020-05-29 | 哈尔滨锅炉厂有限责任公司 | Pipe-pipe plate welding groove suitable for nickel-based welding material |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1358630A (en) * | 1971-06-16 | 1974-07-03 | Goetaverken Ab | Welding machine |
| JPH02133192A (en) * | 1988-11-14 | 1990-05-22 | Ishikawajima Harima Heavy Ind Co Ltd | How to repair the inner surface of a container penetrating pipe |
| CN101336566A (en) * | 2005-12-16 | 2008-12-31 | 阿海珐核能公司 | Pressurizer heater for the primary cooling system of a pressurized-water nuclear reactor |
| FR2964238A1 (en) * | 2010-08-30 | 2012-03-02 | Cegelec | Replacing old heating rod by new heating rod on pressurizer nuclear reactor, by welding sleeve extending from sleeve passage of nuclear reactor on connection zone integral with heating rod, and welding extension sleeve on sleeve passage |
| CN102689081A (en) * | 2011-03-24 | 2012-09-26 | 巴布日立工业株式会社 | Tig welding device |
| CN203018922U (en) * | 2012-12-13 | 2013-06-26 | 中国核动力研究设计院 | Electrical heating element sleeve welding structure of voltage stabilizer in pressurized water reactor nuclear power plant |
-
2012
- 2012-12-13 CN CN201210536608.7A patent/CN103862186A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1358630A (en) * | 1971-06-16 | 1974-07-03 | Goetaverken Ab | Welding machine |
| JPH02133192A (en) * | 1988-11-14 | 1990-05-22 | Ishikawajima Harima Heavy Ind Co Ltd | How to repair the inner surface of a container penetrating pipe |
| CN101336566A (en) * | 2005-12-16 | 2008-12-31 | 阿海珐核能公司 | Pressurizer heater for the primary cooling system of a pressurized-water nuclear reactor |
| FR2964238A1 (en) * | 2010-08-30 | 2012-03-02 | Cegelec | Replacing old heating rod by new heating rod on pressurizer nuclear reactor, by welding sleeve extending from sleeve passage of nuclear reactor on connection zone integral with heating rod, and welding extension sleeve on sleeve passage |
| CN102689081A (en) * | 2011-03-24 | 2012-09-26 | 巴布日立工业株式会社 | Tig welding device |
| CN203018922U (en) * | 2012-12-13 | 2013-06-26 | 中国核动力研究设计院 | Electrical heating element sleeve welding structure of voltage stabilizer in pressurized water reactor nuclear power plant |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098113A (en) * | 2016-07-28 | 2016-11-09 | 中国原子能科学研究院 | A kind of presurized water reactor reactor pressure vessel upper cover |
| CN109262204A (en) * | 2018-09-14 | 2019-01-25 | 中核核电运行管理有限公司 | A kind of a full set of technique of nuclear power plant's voltage-stablizer electrical heating elements scene replacement |
| CN111203669A (en) * | 2020-01-17 | 2020-05-29 | 哈尔滨锅炉厂有限责任公司 | Pipe-pipe plate welding groove suitable for nickel-based welding material |
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Application publication date: 20140618 |