CN101916599B - Probe frame of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel - Google Patents
Probe frame of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel Download PDFInfo
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- CN101916599B CN101916599B CN2010102568213A CN201010256821A CN101916599B CN 101916599 B CN101916599 B CN 101916599B CN 2010102568213 A CN2010102568213 A CN 2010102568213A CN 201010256821 A CN201010256821 A CN 201010256821A CN 101916599 B CN101916599 B CN 101916599B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention relates to a probe frame of a supersonic inspection device for a weld joint at a safe end of a nuclear reactor pressure vessel. Multiple groups of probe frames are distributed on a rotating disc along a circumferential direction, and the centers of all the probe frames are in the same plane. Each probe frame comprises a supersonic probe, a retainer connected with the supersonic probe, and two stages of linear motion mechanism connected with the retainer and used for driving the retainer to stretch or retract radially along the rotating disc; the first stage of linear motion mechanism is used for controlling the position of the probe frame relative to the rotating disc; the second stage of linear motion mechanism is used for controlling the position of the prove frame relative to a movable seat plate; under the restriction of the two stages of linear motion mechanism, the supersonic probe can effectively prevent scratching the inner wall of a pipe nozzle when in a retraction state and can ensure perfect coupling with the inner wall of the pipe nozzle for ensuring accurate and reliable scanning results when in a stretching sate.
Description
Technical field
The present invention relates to the checkout equipment field of nuclear power plant reactor pressure vessel, particularly to pressure vessel water delivering orifice and water inlet ozzle position supersonic inspection device and ultrasonic probe frame at labour/preservice inspection.
Background technology
Nuclear reactor pressure container is one of of paramount importance parts of nuclear power station, is used for fixing, supports and contain reactor core and all in-pile components, is nuclear power plant's unique non-exchange large component in the whole phase in longevity.The quality of nuclear reactor pressure container is to guarantee that Nuclear Power System is normal, the key of safe operation.Nuclear reactor pressure container shown in Figure 8; Its main body is a cylinder 101; Cylinder 101 tops are connected with semisphere upper cover (not shown), flange 102 through bolt assembly, and cylinder 101 bottoms are welded with semisphere low head 103, and spaced radial is welded with a plurality of water inlet ozzles 104 and water outlet ozzle 105 on the cylinder cylindrical shell; On water inlet ozzle 104 and water outlet ozzle 105, be welded with a safe end 106 respectively, safe end 106 welds with trunk line 107 mutually.Quality for the definite kernel reactor pressure vessel; In the inspection specification and outline of nuclear power plant and nuclear power unit; Each weld seam on the pressure vessel and other position have been proposed the Compulsory Feature of Non-Destructive Testing, and specified respectively and before putting into operation with after moving the certain hour interval, pressure vessel is implemented the preceding and inservice inspection of labour.Result with inservice inspection before the labour provides extremely important foundation for the state of analyzing pressure vessel.
Weld seam detection to each ozzle place of nuclear reactor pressure container comprises: the weld seam detection (being designated 1002 positions among Fig. 8) of the weld seam detection of ozzle outer end and safe end junction (as being designated 1001 positions among Fig. 8), safe end and trunk line junction, ozzle and cylindrical shell attachment weld detect (being designated 1003 position among the figure).Wherein trunk line and safe end junction are metal solder of the same race; And ozzle outer end and safe end junction are the dissimilar metal welding.Because pore, rosin joint, incomplete fusion or defective such as lack of penetration take place easily for the welding of foreign material, these defectives are the hidden danger that security incident takes place, and therefore need emphasis inspection.
Because the application circumstances of pressure vessel; Slickness to pressure vessel nozzle, safe end and trunk line inwall is had relatively high expectations, and therefore, supersonic inspection device is in stretching into the ozzle process or from the process that ozzle is extracted out; Should avoid scratching inwall; Simultaneously, when in ozzle, carrying out scanning, also should guarantee the coupling of ultrasonic probe and inwall.Mostly existing probe holder is single linear drives, and it can not be contracted in the rolling disc fully, can not guarantee after the stretching, extension and effective Contact Coupled of inwall, is easy to generate drain sweep, thereby the reliability of testing result and accuracy can not get guaranteeing; Perhaps existing probe holder structure makes the layout of ultrasonic probe in ozzle be restricted more greatly, thereby causes the scanning process to produce the time of the invalid scanning movement travel pressure boost vessel safety end welding line ultrasonic inspection of certain distance.
Summary of the invention
The present invention seeks to a kind of compact conformation to be provided and help probe to arrange for the deficiency that overcomes prior art, can effectively prevent to scratch the pressure vessel nozzle inwall again, when detecting with the coupling of ozzle inwall better with the reliable probe holder of assurance testing result.
For achieving the above object; The technical scheme that the present invention adopts is: a kind of probe holder of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel; It has many groups; And organize probe holder along circumferentially being distributed on the rolling disc more; The center of all ultrasonic probes in same plane, each described probe holder comprises ultrasonic probe, be connected with ultrasonic probe and with ultrasonic probe between have two rotary motion pairs so that ultrasonic probe adapts to the retainer of ozzle inner wall shape, being connected with retainer is used to drive the structure of linear motion of retainer along rolling disc circumferentially extending or contraction, described structure of linear motion is a two-stage; First order structure of linear motion comprises the fixed pedestal that is fixedly connected with rolling disc, is positioned at the straight-line movable base plate of fixed pedestal top relative fixed pedestal; Second level structure of linear motion comprises the interlock piece that is fixedly connected with movable base plate, is slidably disposed on the sliding bar in the interlock piece, and rotating on described retainer and the sliding bar is connected, and described first order structure of linear motion is used to control the position of probe holder with respect to rolling disc; Described second level structure of linear motion is used to control the position of probe holder with respect to movable base plate; Promptly when probe holder was in contraction state, ultrasonic probe was positioned at the movable base plate below, and movable base plate is positioned at the circumference of rolling disc; When probe holder was in extended configuration, ultrasonic probe was positioned at the movable base plate top and is coupled with the ozzle inwall, and movable base plate stretches out outside the rolling disc.
In optimally implementing according to technique scheme institute, described movable base plate upper end is provided with and is used for the universal ball that fits with the ozzle inwall, when probe holder is in contraction state; Described ultrasonic probe is positioned at the below on plane, universal ball place; When probe holder was in extended configuration, described ultrasonic probe was positioned at the top on plane, universal ball place, through universal ball is set; When probe holder is in contraction state; Ultrasonic probe is positioned under the universal ball, has avoided contacting of ultrasonic probe and ozzle inwall, has prevented the possibility that the ozzle inwall is scratched.And universal ball appearance is very smooth, and it contact with the ozzle inwall, make whole probe scanning device ozzle circumferential or axial on motion more smooth.
Further; Described first order structure of linear motion also comprises the plunger that is arranged on the fixed pedestal upper end; Described second level structure of linear motion also comprises constant force spring that the constant force spring seat that is fixedly connected with the sliding bar lower end, an end winding other end and interlock piece in the constant force spring seat be fixedly connected, an end and the sliding bar chute handle that pushes back that is connected that the other end is faced with described plunger mutually and rotates and be connected with movable base plate mutually, described plunger, pushes back between handle and the sliding bar and forms leverage.
Described movable base plate is by air cylinder driven, and the cylinder body and the fixed pedestal of cylinder are fixedly connected, and the piston rod upper end of cylinder is fixedly connected with movable base plate.
Because probe holder of the present invention adopts the two-stage structure of linear motion; Ultrasonic probe is under the constraint of two-stage structure of linear motion; When it is in contraction state, can effectively prevent to scratch the ozzle inwall, when it is in extended configuration; Can guarantee and the good coupling of ozzle inwall, guarantee that the result of scanning is accurately reliable.
Description of drawings
Accompanying drawing 1 is the front view of the supersonic inspection device of application probe holder of the present invention;
Accompanying drawing 2 is positioned at the constitutional diagram (omitting with the ozzle axial line is the opposite side of axis of symmetry) in the ozzle for supersonic inspection device shown in the accompanying drawing 1;
Accompanying drawing 3 is for being equipped with the probe scanning module front view of probe holder of the present invention;
Accompanying drawing 4 is probe holder perspective view of the present invention;
Accompanying drawing 5 is in the extended configuration front view for probe holder;
Accompanying drawing 6 is in the contraction state front view for probe holder;
Accompanying drawing 7 is a probe holder motion principle sketch;
Accompanying drawing 8 is existing construction of pressure vessel cut-open view;
Wherein: 1, front end supporting module; 2, rear end supporting module; 3, guide assembly; 4, ultrasonic probe scanning module 42, rolling disc 43, probe holder 431, ultrasonic probe; 432, retainer; 433, first order structure of linear motion; 4331, fixed pedestal; 4332, movable base plate; 4333, drive cylinder; 4334, universal ball; 4335, plunger; 4336, guide pole; 4337, lower connecting plate; 434, second level structure of linear motion; 4341, interlock piece; 4342, sliding bar; 4343, constant force spring seat; 4344, constant force spring; 4345, push back handle;
Embodiment
Below in conjunction with accompanying drawing, specify the probe holder particular content of enforcement preferred for this invention for example:
Supersonic inspection device illustrated in figures 1 and 2, its mainly by front end supporting module 1, rear end supporting module 2, be detachably connected on the guide assembly 3 between front end supporting module 1 and the rear end supporting module 2 and be arranged on the guide assembly 3 that guide assembly 3 relatively carries out axial linear movement and the ultrasonic probe scanning module 4 of circumferentially rotating is formed.Wherein, Front end supporting module 1 mainly plays the effect of guiding and radial location in ozzle; Rear end supporting module 2 is mainly used in realization equipment on the pressure container cylinder wall and along the axial location of ozzle; Guide assembly 3 mainly plays the support of ultrasonic probe scanning module 4 and drives ultrasonic probe scanning module 4 above that along the ozzle axial linear movement; Ultrasonic probe scanning module 4 is provided with probe holder 43, through control ultrasonic probe scanning module 4 in axially-movable on the guide assembly 3 and circumferentially rotate realize ozzle and safe end and trunk line between the scanning work of weld seam.Above-mentioned front end supporting module 1, rear end supporting module 2 and guide assembly 3 are not main points of the present invention; Probe holder of the present invention can be applied independently on the inspection main body that is different from above-mentioned module composition, so repeat no more at this concrete structure composition to front end supporting module 1, rear end supporting module 2 and guide assembly 3.
Because the ozzle inwall of pressure vessel is columniform basically, therefore, in probe holder practical application of the present invention, be fixed and along circle distribution on a rolling disc 42, as shown in Figure 3, through driving the rotation of rolling disc 42, make probe holder realize scanning work.
Particularly; On rolling disc shown in Figure 3 42; Be distributed with 6 probe holders 43; Each probe holder 43 structure such as Fig. 4 are to shown in Figure 6; It comprises ultrasonic probe 431, be connected with ultrasonic probe 431 and with ultrasonic probe 431 between have the retainer 432 of two rotary motion pairs, the two-stage structure of linear motion that can radially make the straight line contractile motion along rolling disc 42 that is connected with retainer 432; First order structure of linear motion 433 comprises the fixed pedestal 4331 that is fixed on the rolling disc 42, is provided with the movable base plate 4332 of universal ball 4334 in above the fixed pedestal 4331 and its upper end, the double acting that is connected between fixed pedestal 4331 and the movable base plate 4332 drives cylinder 4333, and movable base plate 4332 is called first order rectilinear motion with respect to the rectilinear motion of fixed pedestal 4331, by driving cylinder 4333 drivings; Described second level structure of linear motion 434 comprises and is positioned at movable base plate 4332 belows and the interlock piece 4341 that is fixedly connected with movable base plate 4332, is slidably disposed on the sliding bar 4342 on the interlock piece 4341; Described retainer 432 rotates with sliding bar 4342 upper ends and is connected, and described retainer 432 rectilinear motion with respect to movable base plate 4332 under the drive of sliding bar 4342 is called second level rectilinear motion.The motion principle of whole probe holder 43 can be reduced to as shown in Figure 7.
Under the effect of above-mentioned two-stage structure of linear motion; Described probe holder 43 has contraction and stretches two states; When probe holder 43 was in contraction state, like Fig. 3 and shown in Figure 6, described movable base plate 4332 was drawn close with fixed pedestal 4331 mutually; And movable base plate 4332 is positioned at the circumference of rolling disc 42, and the projection that described ultrasonic probe 431 makes progress in rolling disc 42 footpaths is lower than the projection that movable base plate 432 makes progress in rolling disc 42 footpaths; When described probe holder 43 is in extended configuration; Like Fig. 4 and shown in Figure 5; Described movable base plate 4332 is away from fixed pedestal 4331 and protrude the periphery at rolling disc 42, and described ultrasonic probe 431 is higher than the projection of movable base plate 432 on rolling disc 42 extend radially lines in the projection on the rolling disc 42 extend radially lines.
In the present embodiment; First order structure of linear motion 433 also further comprises the bulb plunger 4335 that is arranged on fixed pedestal 4331 upper ends, be located in the fixed pedestal 4331 slidably and guide pole 4336 that upper end and movable base plate 4332 are fixedly connected, and guide pole 4336 lower ends and are set in the lower connecting plate 4337 that drives on cylinder 4333 cylinder bodies and are fixedly connected.Second level structure of linear motion 434 further comprise constant force spring 4344 that the constant force spring seat 4343 that is fixedly connected with sliding bar 4342 lower ends, an end winding other end and interlock piece 4341 in constant force spring seat 4343 be fixedly connected, middle and movable base plate 4332 rotate be connected and an end and sliding bar 4342 mutually chute be connected that the other end and described bulb plunger 4335 face mutually push back handle 4345.When probe holder 43 is in extended configuration; As shown in Figure 5, guide pole 4336 is risen to a height synchronously by movable base plate 4332, pushes back handle 4345 and is in free state; Constant force spring seat 4343 is drawn close with interlock piece 4341 mutually; Via the driving of constant force spring 4344, sliding bar 4342 is upwards released, and ultrasonic probe is in the position that is higher than movable base plate 4332; When probe holder 43 by extended configuration in the contraction state transfer process, the piston rod that drives cylinder 4333 shrinks, movable base plate 4332 is drawn close to fixed pedestal 4331; Bulb plunger 4335 on fixed pedestal 4331 contacts with pushing back handle 4345, along with the further contraction of cylinder, and the end that plunger 4335 will push back handle 4345 jack-up that makes progress; The other end that pushes back handle 4345 turning axle between wherein rotates, thereby plunger 4335, pushes back between handle 4345 and the sliding bar 4342 and form leverage, according to lever principle; Sliding bar 4342 will move downward; Thereby overcome the acting force of constant force spring 4344, promote constant force spring seat 4343 and move downward, be under movable base plate 4332 surface levels until ultrasonic probe 431; As shown in Figure 6, promptly realize the conversion of probe holder 43 from the extended configuration to the contraction state.
In the present embodiment, each probe holder 43 is provided with two ultrasonic probes 431, so corresponding each ultrasonic probe 431 is respectively arranged with the second level straight-line motion mechanism 434 that is connected with movable base plate 4332.
Above-mentioned ultrasonic probe shelf structure and action principle that the present invention implemented are illustrated; Its major advantage is: when probe holder shrinks; Ultrasonic probe 431 is getting into ozzle or from ozzle, in the extraction, is avoiding ultrasonic probe 431 to contact with the ozzle inwall under universal ball 4334; But contact with the ozzle inwall, thereby prevent that the ultrasonic probe frame from scratching the ozzle inwall by the surface smooth universal ball 4334 of ten minutes; When probe holder is in extended configuration; Ultrasonic probe 431 is higher than the position of universal ball 4334 under the effect of constant force spring 4344; And owing to have two rotary motion pairs between ultrasonic probe 431 and the retainer 432; Ultrasonic probe 431 always can keep fitting with the ozzle face, and the constant pulling force that equals constant force spring 4344 of applying power, has guaranteed the accuracy of scanning; The probe holder compact conformation, make all probe holders can be arranged on the same rolling disc and all ultrasonic probe centers on same plane, thereby avoided probe holder to produce invalid scanning stroke effectively at the ozzle inwall.
Concrete scanning process is following:
After checkout facility is fixed in the ozzle, stretch out direction ventilation pressure for the driving cylinder of ultrasonic probe frame, make all ultrasonic probe framves be in extended configuration, the ultrasonic probe and the ozzle inwall that are fixed on the ultrasonic probe frame are fitted.According to the scanning planning execution scanning task that scrutiny program requires, typical scanning mode has two kinds: a kind of detection of being called, promptly circumferentially from 0 ° of scanning to 361 °; Axial stepping 5mm; Then, circumferentially get back to 0 °, axial stepping 5mm from 361 °; So back and forth, up to covering whole examine zone; Another kind is called sizing, promptly axially from the 0mm position to the 426mm position, circumferentially stepping is 0.4 °, axially from the 426mm position to the 0mm position, circumferentially stepping is 0.4 °, so back and forth, up to covering whole examine zone; At last; Each cylinder of controlling each probe holder, front end supporting module shrinks; Through control lever checkout facility is slowly shifted out in ozzle; All in ozzle, shift out until entire equipment, use ring to hang at last or the rear end supporting module of other boom hoisting and equipment on suspension ring be connected so that equipment is hung out in nuclear reactor pressure container.
Claims (9)
1. the probe holder of a supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel; It has many groups; And organize probe holder along circumferentially being distributed on the rolling disc more; Each described probe holder comprises ultrasonic probe, be connected with ultrasonic probe and with ultrasonic probe between have two rotary motion pairs so that ultrasonic probe adapts to the retainer of ozzle inner wall shape, being connected with retainer is used to drive the structure of linear motion of retainer along rolling disc circumferentially extending or contraction; It is characterized in that: described structure of linear motion is a two-stage; First order structure of linear motion comprises the fixed pedestal that is fixedly connected with rolling disc, is positioned at the straight-line movable base plate of fixed pedestal top relative fixed pedestal; Second level structure of linear motion comprises the interlock piece that is fixedly connected with movable base plate, is slidably disposed on the sliding bar in the interlock piece; Described retainer rotates with the sliding bar upper end and is connected, and described first order structure of linear motion is used to control the position of probe holder with respect to rolling disc, and described second level structure of linear motion is used to control the position of probe holder with respect to movable base plate.
2. the probe holder of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel according to claim 1 is characterized in that: the center of all ultrasonic probes of organizing said probe holder in same plane more.
3. the probe holder of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel according to claim 1; It is characterized in that: described movable base plate upper end is provided with and is used for the universal ball that fits with the ozzle inwall; When probe holder is in contraction state; Described ultrasonic probe is positioned at the below on plane, universal ball place, and when probe holder was in extended configuration, described ultrasonic probe was positioned at the top on plane, universal ball place.
4. according to the probe holder of arbitrary described supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel in the claim 1 to 3; It is characterized in that: described first order structure of linear motion also comprises the plunger that is arranged on the fixed pedestal upper end; Described second level structure of linear motion also comprises constant force spring that the constant force spring seat that is fixedly connected with the sliding bar lower end, an end winding other end and interlock piece in the constant force spring seat be fixedly connected, an end and the sliding bar chute handle that pushes back that is connected that the other end is faced with described plunger mutually and rotates and be connected with movable base plate mutually, described plunger, pushes back between handle and the sliding bar and forms leverage.
5. the probe holder of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel according to claim 1; It is characterized in that: described movable base plate is by air cylinder driven; The cylinder body and the fixed pedestal of cylinder are fixedly connected, and the piston rod upper end of cylinder is fixedly connected with movable base plate.
6. the probe holder of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel according to claim 5, it is characterized in that: described cylinder is a double-acting cylinder.
7. according to the probe holder of the supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel in the claim 4; It is characterized in that: every group of described probe holder has two ultrasonic probes; Each ultrasonic probe links to each other respectively and is connected to second level structure of linear motion, and two second level structure of linear motion are connected with described first order structure of linear motion jointly.
8. the probe holder of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel according to claim 7, it is characterized in that: described two ultrasonic probes are positioned at the same side of movable base plate.
9. the probe holder of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel according to claim 8; It is characterized in that: described first order structure of linear motion also comprises the guide pole that is slidingly connected with described fixed pedestal, and described guide pole upper end is fixedly connected with movable base plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102568213A CN101916599B (en) | 2010-08-19 | 2010-08-19 | Probe frame of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel |
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| CN2010102568213A CN101916599B (en) | 2010-08-19 | 2010-08-19 | Probe frame of supersonic inspection device for weld joint at safe end of nuclear reactor pressure vessel |
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| CN101916599A CN101916599A (en) | 2010-12-15 |
| CN101916599B true CN101916599B (en) | 2012-12-26 |
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| CN102509566B (en) * | 2011-10-17 | 2014-03-12 | 中广核检测技术有限公司 | Nuclear rector pressure vessel nozzle safe end welding joint automatic ray inspection device |
| CN103187111B (en) * | 2011-12-28 | 2015-08-26 | 核动力运行研究所 | A kind of nuclear plant pressure vessels peace note pipe welding line ultrasonic checking tool |
| CN103761998B (en) * | 2014-01-20 | 2016-04-06 | 中广核检测技术有限公司 | Reactor pressure vessel nozzle inspection probe holder |
| CN105806938B (en) * | 2014-12-30 | 2019-03-26 | 中核武汉核电运行技术股份有限公司 | A kind of nuclear reactor pressure container water outlet filleted corner ultrasound automatic checking device |
| CN104979029B (en) * | 2015-05-20 | 2017-04-19 | 中广核检测技术有限公司 | Ultrasonic inspection device for omega welding seam of control rod drive mechanism in nuclear power station |
| CN106802324B (en) * | 2016-12-26 | 2020-02-21 | 中核北方核燃料元件有限公司 | Eight-channel probe adjusting device for bar ultrasonic detection |
| CN108269626B (en) * | 2016-12-30 | 2023-08-15 | 核动力运行研究所 | Ultrasonic inspection system for inner wall of vertical connecting pipe of nuclear reactor steam generator |
| CN109545406B (en) * | 2018-11-19 | 2022-12-06 | 中广核检测技术有限公司 | Cable built-in probe disc device for ultrasonic inspection of outer wall of nuclear power station pipeline |
| CN110864655A (en) * | 2019-11-07 | 2020-03-06 | 中国石油天然气集团公司管材研究所 | Casing drift diameter thickness measuring device and sorting and repairing method for old stored casings |
| CN112461936B (en) * | 2020-11-30 | 2024-04-23 | 中广核检测技术有限公司 | Ultrasonic TOFD (time of flight diffraction) inspection system for thick-wall pressure vessel |
| CN114983471A (en) * | 2022-08-05 | 2022-09-02 | 杭州影想未来科技有限公司 | Automatic robot of looking into of supersound |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0616029B2 (en) * | 1986-04-16 | 1994-03-02 | 東京電力株式会社 | Ultrasonic flaw detector |
| JPH1123785A (en) * | 1997-06-30 | 1999-01-29 | Hitachi Ltd | In-reactor pipe nozzle work device |
| US7412890B1 (en) * | 2003-12-31 | 2008-08-19 | General Electric Company | Methods and apparatus for detecting cracks in welds |
| CN101192458B (en) * | 2006-11-30 | 2011-09-21 | 核动力运行研究所 | Pressure vessels top cover actuating device lower omega welding seam ultrasonic inspection method and device |
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Address after: Futian District, Shenzhen City Road 518000 Guangdong Province Science & Technology Building 1001, 1506 Patentee after: CGNPC Inspection Technology Co., Ltd. Patentee after: Suzhou Nuclear Power Research Institute Co., Ltd. Patentee after: China General Nuclear Power Corporation Address before: Futian District, Shenzhen City Road 518000 Guangdong Province Science & Technology Building 1001, 1506 Patentee before: CGNPC Inspection Technology Co., Ltd. Patentee before: Suzhou Nuclear Power Research Institute Co., Ltd. Patentee before: China Guangdong Nuclear Power Group Co., Ltd. |