CN104979027A - Eddy current scanner for lower omega-shaped weld seam of control rod drive assembly of nuclear power plant - Google Patents
Eddy current scanner for lower omega-shaped weld seam of control rod drive assembly of nuclear power plant Download PDFInfo
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- CN104979027A CN104979027A CN201510258094.7A CN201510258094A CN104979027A CN 104979027 A CN104979027 A CN 104979027A CN 201510258094 A CN201510258094 A CN 201510258094A CN 104979027 A CN104979027 A CN 104979027A
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- control rod
- eddy current
- upper base
- nuclear power
- current scanner
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/002—Detection of leaks
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
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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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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses an eddy current scanner for a lower omega-shaped weld seam of a control rod drive assembly of a nuclear power plant. The eddy current scanner comprises a probe, a camera, a probe holder, a camera holder, a rotating part, a locating part and a translating part, wherein the probe holder is used for holding the probe, and the camera holder is used for holding the camera; and the rotating part is of an arc shape, of which the radian is greater than pi, the spacing between the two end parts of the rotating part is greater than the diameter of a control rod, the rotating part comprises an upper base, which is arc-shaped and is fixedly connected with the locating part, a mobile table, which is arc-shaped and does circular motion on the upper base by taking the upper base as the center of circle, and a driving mechanism which drives the mobile table to do circular motion on the upper base, and the sum of the radian of the mobile table and the radian of the upper base is greater than 2*pi. According to the eddy current scanner, the circular motion for the probe and the camera is realized by using the mobile table which can do circular motion on the upper base, and then, 360-degree check on the omega-shaped weld seam is realized by using a single probe-and-camera group.
Description
Technical field
The present invention relates to nuclear power field of non destructive testing, particularly a kind of nuclear power station control rod drive assembly lower omega welding seam eddy current scanner.
Background technology
Omega welding seam is the special seal weld seam be positioned in nuclear power station control rod drive mechanisms (CRD), be positioned at the pressure boundary of primary Ioops, be subject to the acting in conjunction of vibration, high radiation, internal high temperature hyperbaric environment for a long time, the existence of weld defect can aggravate the development of its corrosion fatigue or SCC, thus causes the leakage of main system.
Lower omega welding seam is C shape stainless-steel thin-wall pipe weld seam, is positioned at the bottom of the drive coil of control rod drive mechanisms (CRD).It is little that omega welding seam has radius, curvature is large, the feature of wall thickness thin (about 3mm), volume shape is carried out to it and checks that difficulty is larger, and its special profile (semicircular configuration), weld seam surfaces externally and internally shaping poor (weld seam is uneven), surrounding environment is narrow and small, and conventional detection method and probe comprehensively cannot detect it.The environmental dose of omega welding seam is higher, and manual flaw detection brings larger injury to testing staff, and this area people cannot arrive.In addition, due to the existence of drive coil, the form of lifting cannot be adopted to install and use loop configuration to carry out Non-Destructive Testing to the whole region of girth joint.
Summary of the invention
The object of this invention is to provide a kind of nuclear power station control rod drive assembly lower omega welding seam eddy current scanner.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of nuclear power station control rod drive assembly lower omega welding seam eddy current scanner, it comprises probe, camera, the probe holder of clamping probe, the shooting headstock of clamping camera, drive probe holder and the shooting headstock around the rotating part of control rod lower rotational for static probe frame and the shooting headstock, be installed on the location division for making eddy current scanner locate below described rotating part, be installed on to drive below described location division described rotating part and location division towards or deviate from the translation part of control rod motion, described rotating part is that radian is greater than the arc of π and its both ends spacing is greater than the diameter of control rod, it comprises central seat that is curved and that be fixedly connected with location division, upper base moves in a circle and curved transfer table with the center of circle of upper base, drive the driving mechanism that described transfer table moves in a circle in upper base, the radian of described transfer table and described upper base and be greater than 2 π.
Optimize, described transfer table lower surface offers the deep-slotted chip breaker matched with described upper base, the built-in motor of the built-in roller of groove and the built-in roller rotation of driver slot is provided with in this deep-slotted chip breaker, deep-slotted chip breaker is arranged in described upper base, and the built-in roller of described groove rotates thus drives transfer table to move in a circle in upper base.
Optimize, described upper base is provided with axes normal upper base upper surface two and arranges angle sheave, the curved distribution of the described angle sheave of two rows forms arc-shaped guide rail, each described angle sheave sidewall offers groove, described transfer table lower surface is fixedly connected with in fan-shaped guiding wing plate, the edge of described guiding wing plate has the projection corresponding with the groove on described angle sheave, described guiding wing plate is between the described angle sheave of two rows and projection is arranged in groove, the described angle sheave of two rows limits described guiding wing plate and moves in the arc-shaped guide rail that two row's angle sheaves are formed.
Further, curved described guiding wing plate upper end has extension, the lateral surface of extension has the tooth of curved distribution, and driving mechanism is included in same row's angle sheave to intert and arranges and the driven wheel be meshed with the tooth of described guiding wing plate upper end, drive motor for driving described driven wheel to rotate.
Optimize, eddy current scanner also comprises central seat and lower base, described central seat is installed between upper base and lower base, described location division comprises and to be connected between described lower base and central seat and be oppositely arranged two positioning cylinders, driven by positioning cylinder thus the locating piece clamping control rod and the nylon block be fixedly installed between lower base and central seat, during location, two described locating pieces and nylon block position line form triangle and clamp described control rod, the length direction of described locating piece is parallel to the axis direction of control rod.
Further, the end that described back up pad is connected with described locating piece is also provided with for guiding location division to the auxiliary guide wheels of control rod both sides.
Optimize, between described location division and translation part, be also connected with micro-swinging mechanism.
Optimize, described transfer table is also provided with zero position switch.
Optimize, described translation part is mechanical bond formula Rodless cylinder.
Beneficial effect of the present invention is: the present invention utilizes the transfer table that can move in a circle in upper base to realize the circular motion of probe and camera, and then the single group of realization is popped one's head in and camera carries out 360 ° of inspections to omega welding seam.
Accompanying drawing explanation
Accompanying drawing 1 is three-dimensional view of the present invention;
Accompanying drawing 2 is the driving rolls of drive division of the present invention and the syndeton schematic diagram of drive motor;
In accompanying drawing: 1, pop one's head in; 2, camera; 3, probe holder; 4, the shooting headstock; 5, rotating part; 6, location division; 7, translation part; 8, micro-swinging mechanism; 31, mount pad; 32, auxiliary stand; 33, guidepost; 34, counterbalance spring; 51, upper base; 52, transfer table; 54, angle sheave; 55, lead wing plate; 56, driven wheel; 57, drive motor; 58, zero position switch; 59, driving rolls; 61, positioning cylinder; 62, locating piece; 63, back up pad; 64, auxiliary guide wheels; 65, nylon block; 66, central seat; 67, lower base.
Embodiment
Below in conjunction with embodiment shown in the drawings, the present invention is described in detail below:
The present invention be directed to a kind of special robotization eddy current and the video inspection device of the feature design of control rod drive assembly lower omega welding seam, this device can realize remote automation location and install, and Long-distance Control butt welded seam carries out comprehensive eddy current and video check.
As shown in Figure 1, nuclear power station control rod drive assembly lower omega welding seam eddy current scanner comprise probe 1, camera 2, the probe holder 3 of clamping probe, clamping camera the shooting headstock 4, for static probe frame 3 and the shooting headstock 4 and drive probe holder 3 and the shooting headstock 4 around control rod lower rotational rotating part 5, be installed on below described rotating part 5 for eddy current scanner locate location division 6, be installed on to drive below described location division 6 described rotating part 5 and location division 6 towards or deviate from the translation part 7 that control rod moves.
Probe holder 3 comprise be connected with transfer table 52 upper end mount pad 31, to be fixed on mount pad 31 and lower end for the auxiliary stand 32 of fixing camera, upper end and to be arranged in guidepost 33 on transfer table 52, to be set on guidepost 33 and for regulating probe 1 at the counterbalance spring 34 of the control rod axial direction upper deviation between mount pad 31 and transfer table 52.
For the feature of lower omega welding seam, need semicircular configuration testing fixture, therefore rotating part 5 is greater than the arc of π and its both ends spacing is greater than the diameter of control rod for radian, it comprises the curved and upper base 51 be fixedly connected with location division 7, move in a circle with the center of circle of upper base 51 in upper base 51 and curved transfer table 52, the driving mechanism that drives described transfer table 52 to move in a circle in upper base 51, the radian of described transfer table 52 and described upper base 51 and be greater than 2 π.Described upper base 51 is provided with axes normal upper base 51 upper surface two and arranges angle sheave 54, the curved distribution of the described angle sheave 54 of two rows forms arc-shaped guide rail, each described angle sheave 54 sidewall offers groove, described transfer table 52 lower surface is fixedly connected with in fan-shaped guiding wing plate 55, the edge of described guiding wing plate 55 has the projection corresponding with the groove on described angle sheave 54, described guiding wing plate 55 is between the described angle sheave 54 of two rows and projection is arranged in groove, the described angle sheave 54 of two rows limits described guiding wing plate 55 and moves in the arc-shaped guide rail that two row's angle sheaves 54 are formed.Curved described guiding wing plate 55 upper end has extension, the lateral surface of extension has the tooth of curved distribution, and driving mechanism is included in same row's angle sheave to intert and arranges and the driven wheel 56 be meshed with the tooth of described guiding wing plate 55 upper end, drive motor 57 for driving described driven wheel 56 to rotate.Drive motor 57 and driven wheel 56 can have multiple connected mode, in the present embodiment, driven wheel 56 totally four, be uniformly distributed on upper base 51 upper surface, each driven wheel 56 is coaxially connected with the driving rolls 59 be positioned on upper base 51 lower surface by the rotating shaft be located in upper base 51, be in transmission connection mutually by travelling belt between adjacent two driving rollss 59, described drive motor 57 is installed on upper base 51 lower surface and is in transmission connection mutually with the travelling belt being positioned at centre, drive motor 57 rotates and drives travelling belt to rotate and then drive driving rolls 59 to rotate, the driven wheel 56 thereupon synchronous axial system that be connected coaxial with driving rolls 59, finally realize each driven wheel 56 drive part by part transfer table 52.Transfer table 52 is also provided with zero position switch 58.
Eddy current scanner also comprises central seat 66 and lower base 67, described central seat 66 is installed between upper base 51 and lower base 67, described location division 6 comprises and to be connected between described lower base 67 and central seat 66 and be oppositely arranged two positioning cylinders 61, driven by positioning cylinder 61 thus the locating piece 62 clamping control rod and the nylon block 65 be fixedly installed between lower base 67 and central seat 66, during location, two described locating pieces 62 and nylon block 65 position line form triangle and clamp described control rod, the length direction of described locating piece 61 is parallel to the axis direction of control rod.The end that described back up pad 63 is connected with described locating piece 61 is also provided with the auxiliary guide wheels 64 for guiding location division to control rod both sides.Also be connected with micro-swinging mechanism 8 between described location division 6 and translation part 7, the upper end of micro-swinging mechanism is connected with lower base 67.Described translation part 7 is mechanical bond formula Rodless cylinder.
Concrete technical scheme of the present invention: use telescopic machine mechanical arm this testing fixture to be transplanted on the side of tested assembly through CRDM gap, translation part is used rotating part and location division to be pushed to the below of weld seam, and make locating piece be close to tested assembly cylindrical section surface, held tightly by two diaphragm types and realize locating the installation of device; Drive motor gear band and then drive driven wheel finally drive transfer table to move along two row's angle sheaves, finally complete 360 ° of rotations, realize dual camera butt welded seam surface and carry out video check, observe face of weld to produce with or without leakage, or exist being close to the factor existence of closing eddy current probe inspection and having a significant effect, the aciculiform cylinder of probe holder promotes probe, special-shaped eddy current probe surface is made to be close to conjunction face of weld, drive motor drives probe butt welded seam surface to carry out 360 degree of eddy current inspections, and check result is analyzed, record those suspected defects position; Probe holder cylinder is regained, and positioning cylinder loosens, and translation part is regained, and testing fixture is transplanted on another tested assembly by telescopic arm.
To sum up, the present invention has the following advantages:
1, this testing fixture is in translation motion, and micro-swinging mechanism can carry out micro-swinging according to the position of device and tested control rod, the relative position of regulating device and tested control rod within the specific limits, guarantees that location is more accurate.
2, described in this device, probe is double coil eddy current probe, and the position of two winding displacement circles crosses one another, and realizes all standing on butt welded seam surface, by judging the type and size of defect to the integrated signal analysis of each coil.
3, this device uses two minisize pick-up head butt welded seam surfaces to carry out video check, and uses face formula light source to provide applicable brightness for checking, guarantees the accuracy of check result and can reaching completely of inspection area.
4, this device uses ultrasonic distance measuring probe to carry out Real-Time Monitoring to whole checking process in installation position fixing process, utilizes the position of the pinpoint accuracy Real-time Feedback device of ultrasonic distance measuring probe, realizes testing fixture and locate fast and accurately.
5, the present invention adopts single drive motor to drive the driven wheel of multiple position, by setting up the sports coupling relation of each driven wheel, realizes each driven wheel drive part by part transfer table, thus realizes using the 360 ° detections of single group probe to Ω girth joint.
6, eddy current probe frame of the present invention adopts multi freedom design, the automatic adjustment of position in circumference and radial direction can be realized, make up the rotation center because device positioning error causes and tested assembly center does not overlap and Plane of rotation does not overlap with horizontal plane thus the probe positions caused is inaccurate or probe positions change with position of rotation and changes, ensure that eddy current probe can be good at the surface of laminating detected weld in checking process.
7, delivery device of the present invention adopts mechanical bond formula Rodless cylinder, and utilize it lightweight, load-bearing capacity is large, and anti-torsion ability is strong, and be applicable to the feature of the general Work tool of conveyance Long travel, make the general assembly (TW) of device less, the stability of linear joint is better.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to the present invention's spirit change or modify; as transfer table lower surface offers the deep-slotted chip breaker matched with upper base; the built-in motor of the built-in roller of groove and the built-in roller rotation of driver slot is provided with in this deep-slotted chip breaker; deep-slotted chip breaker is arranged in upper base; the built-in roller of groove rotates thus drives transfer table to move in a circle in upper base, and this type of change all should be encompassed within protection scope of the present invention.
Claims (9)
1. a nuclear power station control rod drive assembly lower omega welding seam eddy current scanner, it comprises probe (1), camera (2), the probe holder (3) of clamping probe, the shooting headstock (4) of clamping camera, for static probe frame (3) and the shooting headstock (4) and drive probe holder (3) and the headstock (4) of making a video recording around the rotating part (5) of control rod lower rotational, be installed on the location division (6) of described rotating part (5) below for making eddy current scanner locate, be installed on described location division (6) below drive described rotating part (5) and location division (6) towards or deviate from control rod move translation part (7), it is characterized in that: described rotating part (5) is not less than the arc of π in radian and its both ends spacing is greater than the diameter of control rod, it comprises upper base (51) that is curved and that be fixedly connected with location division (7), upper base (51) moves in a circle and curved transfer table (52) with the center of circle of upper base (51), drive the driving mechanism that described transfer table (52) moves in a circle in upper base (51), the radian of described transfer table (52) and described upper base (51) and be greater than 2 π.
2. nuclear power station control rod drive assembly lower omega welding seam eddy current scanner according to claim 1, it is characterized in that: described transfer table (52) lower surface offers the deep-slotted chip breaker matched with described upper base (51), the built-in motor of the built-in roller of groove and the built-in roller rotation of driver slot is provided with in this deep-slotted chip breaker, deep-slotted chip breaker is arranged in described upper base (51), and the built-in roller of described groove rotates thus drives transfer table (52) to move in a circle in upper base (51).
3. nuclear power station control rod drive assembly lower omega welding seam eddy current scanner according to claim 1, it is characterized in that: described upper base (51) is provided with axes normal upper base (51) upper surface two and arranges angle sheave (54), the curved distribution of the two described angle sheave of rows (54) forms arc-shaped guide rail, each described angle sheave (54) sidewall offers groove, described transfer table (52) lower surface is fixedly connected with in fan-shaped guiding wing plate (55), the edge of described guiding wing plate (55) has the projection corresponding with the groove on described angle sheave (54), described guiding wing plate (55) is positioned between the described angle sheave of two row (54) and projection is arranged in groove, it is mobile in the arc-shaped guide rail that two rows' angle sheave (54) are formed that the two described angle sheave of rows (54) limit described guiding wing plate (55).
4. nuclear power station control rod drive assembly lower omega welding seam eddy current scanner according to claim 3, it is characterized in that: curved described guiding wing plate (55) upper end has extension, the lateral surface of extension has the tooth of curved distribution, and driving mechanism is included in same row's angle sheave to intert and arranges and the driven wheel (56) be meshed with the tooth of described guiding wing plate (55) upper end, drive motor (57) for driving described driven wheel (56) to rotate.
5. nuclear power station control rod drive assembly lower omega welding seam eddy current scanner according to claim 1, it is characterized in that: eddy current scanner also comprises curved central seat (66) and curved lower base (67), described central seat (66) is installed between upper base (51) and lower base (67), described location division (6) comprises and to be connected between described lower base (67) and central seat (66) and be oppositely arranged two positioning cylinders (61), driven by positioning cylinder (61) thus the locating piece (62) clamping control rod and the nylon block (65) be fixedly installed between lower base (67) and central seat (66), during location, two described locating pieces (62) and nylon block (65) position line form triangle and clamp described control rod, the length direction of described locating piece (61) is parallel to the axis direction of control rod.
6. nuclear power station control rod drive assembly lower omega welding seam eddy current scanner according to claim 5, is characterized in that: the end that described back up pad (63) is connected to described locating piece (61) is also provided with the auxiliary guide wheels (64) for guiding location division to control rod both sides.
7. nuclear power station control rod drive assembly lower omega welding seam eddy current scanner according to claim 1, is characterized in that: be also connected with micro-swinging mechanism (8) between described location division (6) and translation part (7).
8. nuclear power station control rod drive assembly lower omega welding seam eddy current scanner according to claim 1, is characterized in that: described transfer table (52) is also provided with zero position switch (58).
9. nuclear power station control rod drive assembly lower omega welding seam eddy current scanner according to claim 1, is characterized in that: described translation part (7) is mechanical bond formula Rodless cylinder.
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| CN201510258094.7A CN104979027B (en) | 2015-05-20 | 2015-05-20 | Nuclear power station control rod drive assembly lower omega welding seam is vortexed scanner |
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| CN201510258094.7A CN104979027B (en) | 2015-05-20 | 2015-05-20 | Nuclear power station control rod drive assembly lower omega welding seam is vortexed scanner |
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| CN104979027B CN104979027B (en) | 2017-06-06 |
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Cited By (4)
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| CN105345338A (en) * | 2015-11-28 | 2016-02-24 | 陈伟 | Welding and welding line detection device with efficient wireless control |
| CN107991382A (en) * | 2017-10-16 | 2018-05-04 | 中广核检测技术有限公司 | A kind of pipe vortex detection device |
| CN108269631A (en) * | 2016-12-30 | 2018-07-10 | 核动力运行研究所 | A kind of control rod drive mechanism top seal welding line ultrasonic check device |
| RU226390U1 (en) * | 2023-09-30 | 2024-06-03 | Ооо "Нпк "Техновотум" | DEVICE FOR NON-DESTRUCTIVE SEARCH OF DEFECTS IN HIDDEN PARTS |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345338A (en) * | 2015-11-28 | 2016-02-24 | 陈伟 | Welding and welding line detection device with efficient wireless control |
| CN108269631A (en) * | 2016-12-30 | 2018-07-10 | 核动力运行研究所 | A kind of control rod drive mechanism top seal welding line ultrasonic check device |
| CN108269631B (en) * | 2016-12-30 | 2023-12-26 | 核动力运行研究所 | Ultrasonic inspection device for upper sealing weld joint of control rod driving mechanism |
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| CN104979027B (en) | 2017-06-06 |
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Effective date of registration: 20171016 Address after: Futian District Shenzhen City, Guangdong province 518000 Shennan Road No. 2002 building building room 1258 Co-patentee after: Suzhou Nuclear Power Research Institute Co., Ltd. Patentee after: CGNPC Inspection Technology Co., Ltd. Co-patentee after: China General Nuclear Power Corporation Co-patentee after: China wide nuclear electricity incorporated company Co-patentee after: Guangdong Nuclear Power Joint Venture Co., Ltd Address before: Futian District Shenzhen City, Guangdong province 518000 Shennan Road No. 2002 building building room 1258 Co-patentee before: Suzhou Nuclear Power Research Institute Co., Ltd. Patentee before: CGNPC Inspection Technology Co., Ltd. Co-patentee before: China General Nuclear Power Corporation Co-patentee before: China wide nuclear electricity incorporated company |