CN105499803A - Technology used for assembling and welding irradiating supervision pipe - Google Patents
Technology used for assembling and welding irradiating supervision pipe Download PDFInfo
- Publication number
- CN105499803A CN105499803A CN201610024564.8A CN201610024564A CN105499803A CN 105499803 A CN105499803 A CN 105499803A CN 201610024564 A CN201610024564 A CN 201610024564A CN 105499803 A CN105499803 A CN 105499803A
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- welding
- weld
- monitoring pipe
- irradiation monitoring
- joints
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a technology used for assembling and welding an irradiating supervision pipe. The technology comprises the steps that a, a weld part is prepared and cleaned in an acetone or alcohol solution for 30 min or more ultrasonically; b, assembling is carried out; c, end weld joints of the plane where the truncated edge of one semi-groove shell is located are welded, and then end weld joints of the plane where the truncated edge of the other semi-groove shell is located are welded; d, the long and straight weld joints on the two semi-groove shells are welded, wherein the two weld joints are symmetrically welded at a time in a full-length mode to form the long and straight weld joints; e, end weld joints of two rest side faces of the irradiating supervision pipe are welded. Weld deformation in the length direction and internal concave type deformation of the two sides of a pipe body are effectively controlled, and the weld joints of the intersecting parts of the straight joints of the two ends and circular joints due to welding deformation is avoided. Welding is carried out according to the welding sequence from the step c to the step e, weld penetration is controlled between 1.1 mm and 1.5 mm accurately, and the overall length of the irradiating supervision pipe is 1532 mm, and straightness can be controlled within 0.8 mm.
Description
Technical field
The present invention relates to irradiation monitoring pipe assembly welding field, be specifically related to a kind of technique for irradiation monitoring pipe assembly welding.
Background technology
Irradiation monitoring pipe is the vitals carrying out material radiation effect monitoring in the phase in nuclear reactor longevity for reactor pressure vessel, to acquisition reactor pressure vessel radiation environment data, material irradiation embrittlement degree and development trend, evaluation response core pressure vessel integrality, the safe operation of revision reactor operation parameter and final guarantee reactor is significant.Each irradiation monitoring pipe is primarily of 1 top plug, 1 bottom plug, 2 the mechanics sample such as half pot shell, several hygrosensor and dose detector, all kinds of stretching, impact compositions.Type that irradiation monitoring pipe mainly comprises " two generations ", " two generations added " type and " three generations " AP1000 type irradiation monitoring pipe, although model is more, but its weld seam composition pattern is identical, mainly comprises the long vertical masonry joint between 2 half pot shells, square circumferential weld between top (end) plug with half slot shell, push up the helium that fills filled between sealing-plug and seal circumferential weld and form.Irradiation pipe range vertical masonry joint and square circumferential weld all adopt method for laser welding to complete, and fill helium sealing circumferential weld and adopt the TIG(in vacuum glove box or micro-beam plasma arc) welding method completes.
Irradiation monitoring pipe weld seam due to pattern various, weld seam is long and meticulous, and filling sample is numerous and diverse and assembling is difficult, and weld industry requires strict, therefore the auxiliary mould that how targetedly design specialized is supporting is one of core technology the most key in irradiation monitoring pipe body Deformation control process.At present, the development supply of material of global irradiation monitoring pipe controls primarily of an offshore company, and its staple market share accounts for world market about 70% ~ 80%, especially domestic in China, and the supply of material of current nuclear power market irradiation monitoring pipe is all monopolized by its a company.But, due to particularity and the importance of irradiation tubular construction and purposes, abroad its Key Technology for Development is maintained secrecy.For irradiation monitoring pipe assembly welding special fixture aspect, do not retrieve especially both at home and abroad about the report of this aspect.
Look into newly by data, do not retrieve the relevant report both at home and abroad in irradiation monitoring pipe assembly welding special tooling.
Summary of the invention
The object of the present invention is to provide a kind of technique for irradiation monitoring pipe assembly welding, solve the domestic problem not having irradiation monitoring pipe manufacturing process at present, reach the object that core process is grasped in autonomous innovation.
The present invention is achieved through the following technical solutions:
For a technique for irradiation monitoring pipe assembly welding, comprise the following steps:
(a) prepare soldering part, and in acetone or alcoholic solution more than ultrasonic cleaning 30min;
B () assembles: first plane places one and half slot shells, then places bottom plug successively, fills sample, and top plug, then detains another half slot shell from top, forms irradiation monitoring pipe body;
C () welds one of them half place, slot shell band root face side flat end weld seam, then weld the end weld of another place, half slot shell band root face side plane;
Long straight weld on (d) welding two and half slot shells: two weld seams adopt disposable being symmetrically welded of total length to form long straight weld;
E () welding irradiation monitoring pipe remains the end weld of two sides.
Technique of the present invention is applicant according to the technique developed in the research for many years of this body structure of irradiation monitoring pipe, according to the position of weld seam, design feature butt welded seam is distinguished, the a set of effective production technology summed up, for effectively controlling welding deformation and the distortion of body both sides concave on length direction, avoid the two ends place vertical masonry joint because welding deformation brings and circumferential weld infall Welding bead subsidence simultaneously, adopt as step (c) to the welding sequence of step (e) carries out welding, weld penetration accurately controls between 1.1mm ~ 1.5mm, within the overall total length 1532mm linearity of irradiation monitoring pipe can be controlled in 0.8mm.
The technological parameter that in described step (b), laser spots is solid is: laser power is 300w, and focal length is 0 ~+3mm, and the laser action time is 10ms ~ 20ms, adopts high-purity helium as protective gas, and its flow is 10L/min ~ 15L/min.
Described step (c) is in step (e), and weld seam adopts to focus on weldering and/or defocus Welding and formed; The technological parameter wherein focusing on weldering is: total focus mode laser power 900 ~ 1050W, and speed of welding is 800 ~ 1200mm/min; Defocusing Welding parameter is: focal length+5 ~+10mm, laser power 900 ~ 1050W, and speed of welding is 800 ~ 1200mm/min.
Point of the present invention is consolidated and welding procedure, is utilize existing YAG, optical fiber or CO
2laser welder carries out having welded, and its technological parameter obtains after the experimental and theoretical analysis of hundreds thousand of times of experience, and carry out technology controlling and process according to above-mentioned parameter, the irradiation monitoring pipe Stability Analysis of Structures obtained, performance meets the requirement of standard.
The present invention compared with prior art, has following advantage and beneficial effect:
A kind of technique for irradiation monitoring pipe assembly welding of 1 the present invention, for effectively controlling welding deformation and the distortion of body both sides concave on length direction, avoid the two ends place vertical masonry joint because welding deformation brings and circumferential weld infall Welding bead subsidence simultaneously, adopt as step (c) to the welding sequence of step (e) carries out welding, weld penetration accurately controls between 1.1mm ~ 1.5mm, within the overall total length 1532mm linearity of irradiation monitoring pipe can be controlled in 0.8mm;
A kind of technique for irradiation monitoring pipe assembly welding of 2 the present invention, adopt the object of pintongs centering component be radiation surveillance capsule is clamped fixing, the weld seam of its needs welding exposed simultaneously, for this reason, reversible fixture for assembling and welding is arranged to a cylindrical shape, and is evenly divided into pintongs, can match with pintongs centering component, also be convenient to carry out trickle adjustment, the square card that two ends are arranged adapts with the outside of pintongs centering component again soon, can better clamp;
A kind of technique for irradiation monitoring pipe assembly welding of 3 the present invention, by supporting seat being arranged in a reeded connector of tool, the height of trickle adjustment supporting seat can be facilitated, by increasing the cushion block of different-thickness in groove, thus the height of supporting seat can be adjusted, itself and two spacing reference blocks are adapted;
A kind of technique for irradiation monitoring pipe assembly welding of 4 the present invention, adopt pintongs centering component and turning assembly, carry out design and the development of the special fixture for assembling and welding of irradiation monitoring pipe, the irradiation monitoring pipe assembly welding efficiency developed through adopting this frock improves greatly, disposablely can realize the assembly welding of irradiation monitoring pipe, within the overall total length 1532mm linearity of irradiation monitoring pipe can be controlled in 0.8mm simultaneously.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present invention, forms a application's part, does not form the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the distribution schematic diagram of weld seam on the irradiation monitoring pipe processed of the present invention;
Fig. 2 is the distribution schematic diagram that in Fig. 1, irradiation monitoring pipe overturns weld seam after 180 °.
Mark and corresponding parts title in accompanying drawing:
1 to 10 is weld seam, and its numerical order is the welding sequence in embodiment, and 11-pushes up plug; 12-half slot shell, 13-bottom plug.
Detailed description of the invention
Clearly understand for making the object, technical solutions and advantages of the present invention, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and exemplary embodiment of the present invention and explanation thereof are only for explaining the present invention, not as a limitation of the invention.
Embodiment
As shown in Figure 1, a kind of technique for irradiation monitoring pipe assembly welding of the present invention, welding tooling carries out, frock comprises a pedestal, pedestal adopts cast iron to make, its cross section is I shape, a reeded connector of tool is provided with at the middle part of pedestal, a supporting seat is provided with in connector, supporting seat is provided with two inclined-planes and forms V-shaped groove, pedestal is also provided with and is positioned at supporting seat bilateral symmetry and is distributed in two neck support blocks on straight line, a spacing reference block is also provided with at supporting seat and neck support interblock, spacing reference block is as the benchmark limiting length and height, itself and neck support block, pedestal adopts integrative-structure to be formed, also comprise the pintongs centering component of parcel irradiation monitoring pipe, pintongs centering component is wrapped in the outer rear flank of irradiation monitoring pipe, one end is that bottom plug is fixed on the rolling assembly be arranged on supporting seat, the other end is placed on spacing reference block for pushing up plug, rolling assembly comprises a circular cylinder body, the square fixture block matched with pintongs centering component is provided with in the both sides of cylindrical shell, rolling assembly is divided into four module components in the radial direction thereof, neck support block is provided with and fills in the top of irradiation monitoring pipe the semi-ring matched and withhold block.Fixture Design compatibility of the present invention is good, can take into account irradiation monitoring pipe assembling and welding sequence simultaneously; Effectively can ensure the cooling effect of butt welded seam in irradiation monitoring pipe welding process, avoid Welding bead subsidence; Effectively can ensure irradiation monitoring pipe integrated straight dimension and axiality size; 360 ° of upsets can be realized, effectively improve welding efficiency; Be convenient to dismounting.
Welding procedure is as follows:
A () prepares soldering part, 304 or 304L stainless steel parts, and in acetone or alcoholic solution more than ultrasonic cleaning 30min, a laser welder;
B () assembles: first plane places one and half slot shells 12, then place bottom plug 13 successively, fill sample, top plug 11, then detained from top by another half slot shell 12, form irradiation monitoring pipe body, the technological parameter that wherein laser spots is solid is: laser power is 300w, focal length is 0 ~+3mm, the laser action time is 10ms ~ 20ms, adopts high-purity helium as protective gas, and its flow is 10L/min ~ 15L/min; Welding sequence is set to according to the numerical order in such as Fig. 1 to 2:
C () is owing to there will be body both lateral sides Inward deflection during irradiation monitoring pipe pipe welding, and then there is the problems such as Welding bead subsidence at long vertical masonry joint and square circumferential weld infall when causing weld seam 1 to weld seam 4 to weld, therefore the connection of weld seam 1 to weld seam 4 should first be carried out during irradiation monitoring pipe welding, weld the end weld of slotted eye place plane on one of them half slot shell 12, i.e. weld seam 1, weld seam 2, the order of weld seam 1 and weld seam 2 can be exchanged; Then weld the end weld of slotted eye place plane on another half slot shell 12, i.e. weld seam 3, weld seam 4, the order of weld seam 3 and weld seam 4 can be exchanged;
(d) due to irradiation pipe range vertical masonry joint be the laser weld of 0.8mm thin thick plate, 1330mm length, the pattern of once welding according to direct total length carries out welding, then welding deformation is too large, very easily causes irradiation monitoring pipe body torsional deformation, affects irradiation monitoring pipe final size; But weld according to segmentation, then welding procedure is too complicated, welding efficiency is lower, very easily cause weld seam to occur defect in segmentation lap-joint simultaneously, therefore, in this implementation process, weld seam 5 and weld seam 6 adopt total length to be once symmetrically welded, interpolation and weld joint tracking pattern in the middle of applying, guarantee laser alignment weld seam simultaneously;
(e) due to irradiation monitoring pipe body be arc transition at chamfering place, therefore the welding of weld seam 7 to weld seam 10 should guarantee that weld seam can overlap fully at four chamfering places and weld seam 1 to weld seam 4, thus guarantees the sealing of whole body.
Weld seam adopts to focus on weldering and/or defocus Welding and is formed; The technological parameter wherein focusing on weldering is: total focus mode laser power 900 ~ 1050W, and speed of welding is 800 ~ 1200mm/min; Defocusing Welding parameter is: focal length+5 ~+10mm, laser power 900 ~ 1050W, and speed of welding is 800 ~ 1200mm/min.Focus on the technique welding and defocus weldering can alternatively be used, also can carry out organic assembling.
After the welding of above-mentioned technique, detect, involve in row visual detection according to ASME specification the Vth to finished product radiation surveillance capsule, after testing, there is not the defects such as arc crater, incomplete fusion, incompletely filling, undercut and crackle in weld seam; Involve in row liquid penetration examination according to ASME specification the Vth, after testing, face of weld is without any Flaw display; Irradiation monitoring pipe is placed on and is filled with 0.275MPa ~ 0.3Mpa helium pressure indoor, keep 15 minutes, then stand 133 × 10
-3the negative pressure of Pa, after testing, the helium leak rates with this understanding measured by irradiation monitoring pipe is less than 1 × 10
-7pam
3/ s; Irradiation monitoring pipe is carried out 20MPa, the autoclave test of 280 DEG C, at least 5 hours, carry out second time sealing propertytest to irradiation monitoring pipe after test, after testing, the helium leak rates measured by irradiation monitoring pipe is less than 1 × 10
-7pam
3/ s, liquid penetration examination is without any Flaw display.
Above-described detailed description of the invention; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; the protection domain be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1., for a technique for irradiation monitoring pipe assembly welding, it is characterized in that comprising the following steps:
(a) prepare soldering part, and in acetone or alcoholic solution more than ultrasonic cleaning 30min;
B () assembles: first plane places one and half slot shells, then places bottom plug successively, fills sample, and top plug, then detains another half slot shell from top, forms irradiation monitoring pipe body;
C () welds one of them half place, slot shell band root face side flat end weld seam, then weld the end weld of another place, half slot shell band root face side plane;
Long straight weld on (d) welding two and half slot shells: two weld seams adopt disposable being symmetrically welded of total length to form long straight weld;
E () welding irradiation monitoring pipe remains the end weld of two sides.
2. a kind of technique for irradiation monitoring pipe assembly welding according to claim 1; it is characterized in that: the technological parameter that in described step (b), laser spots is solid is: laser power is 300w; focal length is 0 ~+3mm; the laser action time is 10ms ~ 20ms; adopt high-purity helium as protective gas, its flow is 10L/min ~ 15L/min.
3. a kind of technique for irradiation monitoring pipe assembly welding according to claim 1, is characterized in that: described step (c) is in step (e), and weld seam adopts to focus on weldering and/or defocus Welding and formed; The technological parameter wherein focusing on weldering is: total focus mode laser power 900 ~ 1050W, and speed of welding is 800 ~ 1200mm/min; Defocusing Welding parameter is: focal length+5 ~+10mm, laser power 900 ~ 1050W, and speed of welding is 800 ~ 1200mm/min.
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| CN201610024564.8A CN105499803B (en) | 2016-01-15 | 2016-01-15 | Technology used for assembling and welding irradiating supervision pipe |
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| CN201610024564.8A CN105499803B (en) | 2016-01-15 | 2016-01-15 | Technology used for assembling and welding irradiating supervision pipe |
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| CN105499803B CN105499803B (en) | 2017-04-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644681A (en) * | 2016-10-08 | 2017-05-10 | 中广核工程有限公司 | Sample component and method for nuclear power plant reactor pressure container irradiation inspection test |
| CN112113855A (en) * | 2020-09-18 | 2020-12-22 | 一重集团大连核电石化有限公司 | Steam pressure test method applied to irradiation monitoring pipe |
| CN112404714A (en) * | 2020-10-27 | 2021-02-26 | 中国核动力研究设计院 | Hollow cylinder welding method and welding tool |
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| RU2378091C2 (en) * | 2007-04-10 | 2010-01-10 | Открытое акционерное общество "Новосибирский завод химконцентратов" | Method for contact-butt welding of pipe with plug |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106644681A (en) * | 2016-10-08 | 2017-05-10 | 中广核工程有限公司 | Sample component and method for nuclear power plant reactor pressure container irradiation inspection test |
| CN112113855A (en) * | 2020-09-18 | 2020-12-22 | 一重集团大连核电石化有限公司 | Steam pressure test method applied to irradiation monitoring pipe |
| CN112404714A (en) * | 2020-10-27 | 2021-02-26 | 中国核动力研究设计院 | Hollow cylinder welding method and welding tool |
| CN112404714B (en) * | 2020-10-27 | 2022-06-10 | 中国核动力研究设计院 | Hollow cylinder welding method and welding tool |
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| CN105499803B (en) | 2017-04-19 |
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