CN104849346A - Omega welding seam eddy current automatic checking device for CRDM (control rod driving mechanism) assembly - Google Patents
Omega welding seam eddy current automatic checking device for CRDM (control rod driving mechanism) assembly Download PDFInfo
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- CN104849346A CN104849346A CN201510258928.4A CN201510258928A CN104849346A CN 104849346 A CN104849346 A CN 104849346A CN 201510258928 A CN201510258928 A CN 201510258928A CN 104849346 A CN104849346 A CN 104849346A
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Abstract
The invention discloses an omega welding seam eddy current automatic checking device for a CRDM (control rod driving mechanism) assembly. The omega welding seam eddy current automatic checking device comprises a main support structure, a rotary structure, an eddy current probe frame, a defect identification module, a video module, a positioning module, a servo motor control part and an electric control part. The omega welding seam eddy current automatic checking device has the advantages that the welding seam can be completely checked by an eddy current probe and a miniature camera which completely cover and tightly attach the surface of the omega welding seam; the probe frame is used for multi-degree-of-freedom tail end compensation, so a complete-covering shaped probe can well attach the surface of the welding seam, and the positioning error caused by the misalignment of the rotary structure and the omega ring welding seam center and the like can be compensated; a probe frame and a camera frame are arranged on a rotary mechanism which is driven by a servo motor system, so the accurate positioning and quick eddy current and video check, analysis and evaluation can be performed on the position of the probe by the control of a servo motor.
Description
Technical field
The present invention relates to nuclear power field of non destructive testing, particularly a kind of control rod drive mechanisms (CRD) assembly omega welding seam eddy current automatic checking device.
Background technology
Control rod drive mechanisms (CRD) is a kind of step-type hoisting gear, is used for making C&P systems mention at heap in-core, insert or remain on appropriate location, is: under accidental conditions, require that the translational speed of rod is slow to its action request; Require when scram or accident conditions automatically to throw off C&P systems after obtaining breakdown signal, make the latter by deadweight quick insertion reactor core, to ensure reactor core security of operation.CRDM seal-weld lays respectively at upper, middle and lower, and from project organization, these three weld seams all belong to unstructuredness pressure-bearing weld seam, only seal, and the load of primary Ioops is born by by being threaded.
Upper middle part omega welding seam belongs to special stainless steel thin walled tube structure, top weld seam exradius 5.7mm, wall thickness 2.3mm, middle part weld seam exradius 5.3mm, wall thickness 2.3mm, at a distance of about 305mm, gap 188mm between adjacent component.Due to the singularity of this place's welding line structure, size is little, wall thickness is thin, semicircle, can carry out eddy current inspection according to thin walled tube; Adjacent C RDM pack clearance is narrow, and personnel cannot arrive, and cannot carry out conventional visual and eddy current inspection; Omega welding seam is semicircle polymorphic structure, cannot carry out comprehensive video check in a single direction to whole welded seam area, easily causes undetected, the flase drop of defect; This place's weld size is little, and inspection area is narrow annular region, and testing fixture positioning error in the radial direction has a strong impact on accuracy and the reliability of check result.
Summary of the invention
The object of this invention is to provide a kind of control rod drive mechanisms (CRD) assembly omega welding seam eddy current automatic checking device that can carry out inspection comprehensively to upper middle part omega welding seam.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of control rod drive mechanisms (CRD) assembly omega welding seam eddy current automatic checking device, and it comprises the main supporting structure substantially in column; Be rotationally connected with the rotational structure of described main supporting structure lower end; Be installed on the eddy current probe frame of rotational structure lower end, defect identification module, video module and locating module; For controlling the Serve Motor Control portion that described rotational structure rotates; For controlling the electrical control division of probe holder, defect identification module, video module and locating module action.
Optimize, described eddy current probe frame comprises and being connected and the first L-type connecting plate be made up of the first stringer board and the first transverse slat with rotational structure, fixedly be arranged in the first guide cylinder on described transverse slat, be fixed on described first guide cylinder upper end first limiting plate, two parallel setting and the first guide pole be arranged on described first limiting plate and described first guide cylinder, be fixed on the first double-needle type cylinder below described first transverse slat, be fixed on the first mount pad of the piston rod of described first double-needle type cylinder and the lower end of described first guide pole, described first mount pad is horizontally disposed with and its two ends have the first wing plate to downward-extension respectively, described eddy current probe frame also comprises the first horizontal litter be arranged on described first wing plate, be sheathed on the first base on described first horizontal litter, to be sheathed on described first horizontal litter and the counterbalance spring be fixed between one of them the first wing plate and first base, eddy current probe is installed on described first base.
Optimize, described defect identification module comprises and being connected and the second L-type connecting plate be made up of the second stringer board and the second transverse slat with rotational structure, fixedly be arranged in the second guide cylinder on described transverse slat, be fixed on described second guide cylinder upper end second limiting plate, two parallel setting and the second guide pole be arranged on described second limiting plate and described second guide cylinder, be fixed on the second double-needle type cylinder below described second transverse slat, be fixed on the second mount pad of the piston rod of described second double-needle type cylinder and the lower end of described second guide pole, described second mount pad is horizontally disposed with and its two ends have the second wing plate to downward-extension respectively, described defect identification module also comprises the second horizontal litter be arranged on described second wing plate, be sheathed on the second base on described second horizontal litter, be fixed on the grip block on described second base, be arranged in and accommodate on block and accommodated the identification pencil of block clamping.
Optimize, described video module comprise be connected with described rotational structure extension board, with described extension board tilt arrange and offer regulate the adjustable plate of chute, adjustable ground is installed on miniature video camera in chute, each adjustable plate is provided with two miniature video cameras.
Optimize, shown locating module comprise the plate that is located by connecting that upper end is connected with rotational structure, be installed on described in be located by connecting plate lower end and axially and the perpendicular locating wheel of the axis of described main supporting structure.
Beneficial effect of the present invention is: adopt and can cover comprehensively and fit tightly the eddy current probe on omega welding seam surface and two minisize pick-up heads carry out all standing inspection to omega welding seam.Its probe holder can compensate by multiple degrees of freedom end, can effectively make all standing abnormity probe well fit face of weld, and the positioning error caused not overlap due to rotational structure and Ω girth joint center etc. compensates.Probe holder and the shooting headstock are arranged on the rotating mechanism that driven by servo electrical machinery system, by realizing the control of servomotor carrying out accurate location and eddy current and video check, analysis and inspection fast to probe positions.
Accompanying drawing explanation
Fig. 1 is a kind of nuclear power station control rod drive mechanisms (CRD) omega welding seam pipe vortex detection device scheme of installation;
Fig. 2 is testing fixture structural representation;
Fig. 3 is probe holder structural representation;
Fig. 4 is defect label frame structural representation;
Fig. 5 is camera shelf structure schematic diagram;
In figure: 1, electrical control division; 2, main supporting structure; 3, Serve Motor Control portion; 4, rotational structure; 5, eddy current probe frame; 6, defect identification module; 7, video module; 8, locating module; 9, the first L-type connecting plate; 10, the first limiting plate; 12, the first guide cylinder; 13, the first guide pole; 14, the first double-needle type cylinder; 15, counterbalance spring; 16, the first mount pad; 18, the first base; 19, eddy current probe; 20, the second L-type connecting plate; 21, the second horizontal litter; 22, the second base; 23, grip block; 24, identification pencil; 25, the shooting headstock; 26, miniature video camera; 27, the second guide cylinder; 28, the second limiting plate; 29, the second guide pole; 30, tested omega welding seam place CRDM assembly; 31, the second mount pad; 32, for the adjacent C RDM assembly of circumference location; 33, the second double-needle type cylinder; 34, adjustable plate; 35, grip slipper.
Embodiment
Below in conjunction with embodiment shown in the drawings, the present invention is described in detail below:
As shown in Figure 1, 2, control rod drive mechanisms (CRD) assembly omega welding seam eddy current automatic checking device comprises the main supporting structure 2 substantially in column; Be rotationally connected with the rotational structure 4 of described main supporting structure 2 lower end; Be installed on the eddy current probe frame 5 of rotational structure 4 lower end, defect identification module 6, video module 7 and locating module 8; For controlling the Serve Motor Control portion 3 that described rotational structure 4 rotates; For controlling the electrical control division 1 of probe holder 5, defect identification module 6, video module 7 and locating module 8 action.
Described eddy current probe frame 5 comprises and being connected and the first L-type connecting plate 9 be made up of the first stringer board and the first transverse slat with rotational structure 4, fixedly be arranged in the first guide cylinder 12 on described transverse slat, be fixed on described first guide cylinder 12 upper end first limiting plate 10, two parallel setting and the first guide pole 13 be arranged on described first limiting plate 10 and described first guide cylinder 12, be fixed on the first double-needle type cylinder 14 below described first transverse slat, be fixed on the first mount pad 16 of the piston rod of described first double-needle type cylinder 14 and the lower end of described first guide pole 13, described first mount pad 16 is horizontally disposed with and its two ends have the first wing plate to downward-extension respectively, described eddy current probe frame 5 also comprises the first horizontal litter be arranged on described first wing plate, be sheathed on the first base 18 on described first horizontal litter, to be sheathed on described first horizontal litter and the counterbalance spring 15 be fixed between one of them first wing plate and the first base 18, eddy current probe 19 is installed on described first base 18.
Described defect identification module 6 comprises and being connected and the second L-type connecting plate 20 be made up of the second stringer board and the second transverse slat with rotational structure 4, fixedly be arranged in the second guide cylinder 27 on described transverse slat, be fixed on described second guide cylinder 27 upper end second limiting plate 28, two parallel setting and the second guide pole 29 be arranged on described second limiting plate 28 and the second guide cylinder 27, be fixed on the second double-needle type cylinder 33 below described second transverse slat, be fixed on the second mount pad 31 of the piston rod of described second double-needle type cylinder 33 and the lower end of described second guide pole 29, described second mount pad 31 is horizontally disposed with and its two ends have the second wing plate to downward-extension respectively, described defect identification module 6 also comprises the second horizontal litter 21 be arranged on described second wing plate, be sheathed on the second base 22 on described second horizontal litter 21, be fixed on the grip block 23 on described second base 22, be arranged in and accommodate on block 23 and the identification pencil 24 clamped by blessing block 23.
Described video module 7 comprise be connected with described rotational structure 4 extension board 25, with described extension board 25 tilt arrange and offer regulate the adjustable plate 34 of chute, adjustable ground is installed on the grip slipper 35 in chute, the miniature video camera 26 be arranged on grip slipper 35, each adjustable plate 34 is provided with two miniature video cameras 26, the angle of grip slipper 35 adjustable mini video frequency pick-up head 26 is rotated, the position of mobile grip slipper 35 adjustable mini video frequency pick-up head 26 in chute.
Shown in locating module 8 comprise the plate that is located by connecting that upper end is connected with rotational structure 4, be installed on described in be located by connecting plate lower end and axially and the perpendicular locating wheel of the axis of described main supporting structure 2.
To sum up: the present invention has the following advantages:
1, the present invention adopts a kind of can comprehensively covering being close to of omega welding seam surface closing eddy current probe and two minisize pick-up heads and carry out all standing inspection to omega welding seam.Its probe holder can compensate by multiple degrees of freedom end, can effectively make all standing abnormity probe well fit face of weld, and the positioning error caused not overlap due to rotational structure and Ω girth joint center etc. compensates.Probe holder and the shooting headstock are arranged on the rotating mechanism that driven by servo electrical machinery system, by realizing the control of servomotor carrying out accurate location and eddy current and video check, analysis and inspection fast to probe positions.
2, testing fixture is tubular structure, and eddy current probe frame 5, defect identification module 6, video module 7 are coated in cylindrical case, can realize long-range lifting, reduces control rod mechanism to the human exposure of installation personnel.Before checking, this device hangs in from the top of CRDM assembly, and a wherein velamen inspection CRDM is passed from the hollow hole of device, by being positioned at three centering locating wheels holding tightly CRDM cylindrical section of testing fixture bottom, be positioned at the clamping of Telescopic cylinder to adjacent C RDM of device outside, the support that CRDM base step surface is taken turns rotary rail, carrys out implement device in the location of radial direction, circumferential and axial and installation.Locating module also comprises an electrolevel, can monitor whole installation process and positioning states real-time digitization.
3, this testing fixture adopts integrated electrical control part, can carry out air pressure adjustment, monitoring to centering positioning cylinder, circumferential positioning cylinder, probe holder propulsion cylinder etc.This pneumatic control system adopts hand-operated pneumatic control box, the installation and removal of convenient implement device under electroless state.
4, the probe holder of this testing fixture be a kind of comprise multiple degree of freedom with end adaptive ability, the probe holder system regulated a little can be realized.It adopts crosspointer shape cylinder to promote and compresses, and prevents single cylinder thrust direction from offseting or probe end unbalance stress, causing probe not fit very well signal noise that the reasons such as face of weld or probe do not press tightly cause increase or signal inaccurate; Error in position fixing process is being installed, detected weld center may be caused not overlap with the rotation center of testing fixture, probe inside and outside skew diametrically can be caused, probe holder is provided with end counterbalance spring, can compensate in probe positions the trace skew that positioning error causes, reduce the frictional resistance of probe and face of weld in checking process.
5, this testing fixture use two adjustable mini cameras omega welding seam up and down or inside and outside both sides carry out video check, realize the butt welded seam omnibearing observation in surface, the erroneous judgement of the defect preventing single camera from causing because observation place is not good and failing to judge.And illuminator is housed, can check under the environment of insufficient light.
6, this device arranges defect identification module, and use aciculiform cylinder to promote, butt welded seam carries out the defect found in eddy current and video check process, can realize automatic location, and makes outgoing-line type mark, conveniently carries out follow-up evaluation and maintenance.
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, and all should be encompassed within protection scope of the present invention.
Claims (5)
1. a control rod drive mechanisms (CRD) assembly omega welding seam eddy current automatic checking device, is characterized in that: it comprises the main supporting structure (2) substantially in column; Be rotationally connected with the rotational structure (4) of described main supporting structure (2) lower end; Be installed on the eddy current probe frame (5) of rotational structure (4) lower end, defect identification module (6), video module (7) and locating module (8); For controlling the Serve Motor Control portion (3) that described rotational structure (4) rotates; For controlling the electrical control division (1) of probe holder (5), defect identification module (6), video module (7) and locating module (8) action.
2. control rod drive mechanisms (CRD) assembly omega welding seam eddy current automatic checking device according to claim 1, it is characterized in that: described eddy current probe frame (5) comprises and being connected and the first L-type connecting plate (9) be made up of the first stringer board and the first transverse slat with rotational structure (4), fixedly be arranged in the first guide cylinder (12) on described transverse slat, be fixed on described first guide cylinder (12) upper end first limiting plate (10), two parallel setting and the first guide pole (13) be arranged on described first limiting plate (10) and described first guide cylinder (12), be fixed on the first double-needle type cylinder (14) below described first transverse slat, be fixed on first mount pad (16) of the described piston rod of the first double-needle type cylinder (14) and the lower end of described first guide pole (13), described first mount pad (16) is horizontally disposed with and its two ends have the first wing plate to downward-extension respectively, described eddy current probe frame (5) also comprises the first horizontal litter be arranged on described first wing plate, be sheathed on the first base (18) on described first horizontal litter, to be sheathed on described first horizontal litter and the counterbalance spring (15) be fixed between one of them first wing plate and the first base (18), eddy current probe (19) is installed on described first base (18).
3. control rod drive mechanisms (CRD) assembly omega welding seam eddy current automatic checking device according to claim 1, it is characterized in that: described defect identification module (6) comprises and being connected and the second L-type connecting plate (20) be made up of the second stringer board and the second transverse slat with rotational structure (4), fixedly be arranged in the second guide cylinder (27) on described transverse slat, be fixed on described second guide cylinder (27) upper end second limiting plate (28), two parallel setting and the second guide pole (29) be arranged on described second limiting plate (28) and described second guide cylinder (27), be fixed on the second double-needle type cylinder (33) below described second transverse slat, be fixed on second mount pad (31) of the described piston rod of the second double-needle type cylinder (33) and the lower end of described second guide pole (29), described second mount pad (31) is horizontally disposed with and its two ends have the second wing plate to downward-extension respectively, described defect identification module (6) also comprises the second horizontal litter (21) be arranged on described second wing plate, be sheathed on the second base (22) on described second horizontal litter (21), be fixed on the grip block (23) on described second base (22), be arranged in grip block (23) to go up and the identification pencil (24) clamped by grip block (23).
4. control rod drive mechanisms (CRD) assembly omega welding seam eddy current automatic checking device according to claim 1, it is characterized in that: described video module (7) comprise be connected with described rotational structure (4) extension board (25), with described extension board (25) tilt arrange and offer regulate the adjustable plate of chute (34), adjustable ground is installed on miniature video camera (26) in chute, each adjustable plate (34) is provided with two miniature video cameras (26).
5. control rod drive mechanisms (CRD) assembly omega welding seam eddy current automatic checking device according to claim 1, is characterized in that: shown locating module (8) comprises the plate that is located by connecting that upper end is connected with rotational structure (4), be installed on described in be located by connecting plate lower end and axially with the locating wheel that the axis of described main supporting structure (2) is perpendicular.
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| CN201510258928.4A CN104849346B (en) | 2015-05-20 | 2015-05-20 | CRDM component omega welding seam is vortexed automatic checking device |
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| CN201510258928.4A CN104849346B (en) | 2015-05-20 | 2015-05-20 | CRDM component omega welding seam is vortexed automatic checking device |
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| CN104849346B CN104849346B (en) | 2017-11-28 |
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Cited By (9)
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| CN105116050A (en) * | 2015-09-15 | 2015-12-02 | 昆山斯格威电子科技有限公司 | Weld flaw detection device for friction stir welding |
| CN106442715A (en) * | 2016-11-21 | 2017-02-22 | 北京金风科创风电设备有限公司 | Surface defect detection device |
| 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 |
| CN108204989A (en) * | 2017-12-27 | 2018-06-26 | 福建省永正工程质量检测有限公司 | A kind of construction steel structure 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 |
| CN108760745A (en) * | 2018-04-12 | 2018-11-06 | 上海建工集团股份有限公司 | Diaphram wall seam leakage inspector and method |
| CN108828061A (en) * | 2018-06-14 | 2018-11-16 | 上海应用技术大学 | A kind of eddy current testing device of stainless steel jointless short tube surface microscopic defect |
| CN111896613A (en) * | 2020-07-29 | 2020-11-06 | 上海应用技术大学 | Stainless steel flat welded pipe welding seam defect eddy current on-line measuring 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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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116050A (en) * | 2015-09-15 | 2015-12-02 | 昆山斯格威电子科技有限公司 | Weld flaw detection device for friction stir welding |
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| CN108204989A (en) * | 2017-12-27 | 2018-06-26 | 福建省永正工程质量检测有限公司 | A kind of construction steel structure detection device |
| CN108760745A (en) * | 2018-04-12 | 2018-11-06 | 上海建工集团股份有限公司 | Diaphram wall seam leakage inspector and method |
| CN108828061A (en) * | 2018-06-14 | 2018-11-16 | 上海应用技术大学 | A kind of eddy current testing device of stainless steel jointless short tube surface microscopic defect |
| CN108828061B (en) * | 2018-06-14 | 2022-05-27 | 上海应用技术大学 | Eddy current detection device for surface micro-defects of stainless steel seamless short pipe |
| CN111896613A (en) * | 2020-07-29 | 2020-11-06 | 上海应用技术大学 | Stainless steel flat welded pipe welding seam defect eddy current on-line measuring 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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Effective date of registration: 20150805 Address after: Futian District Shenzhen City, Guangdong province 518000 Shennan Road No. 2002 building building room 1258 Applicant after: CGNPC Inspection Technology Co., Ltd. Applicant after: Suzhou Nuclear Power Research Institute Co., Ltd. Applicant after: China General Nuclear Power Corporation Applicant after: China wide nuclear electricity incorporated company Address before: Futian District Shenzhen City, Guangdong province 518000 Shennan Road No. 2002 building building room 1258 Applicant before: CGNPC Inspection Technology Co., Ltd. Applicant before: Suzhou Nuclear Power Research Institute Co., Ltd. Applicant before: China General Nuclear Power Corporation |
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