CN104992734B - Reactor pressure vessel bottom head penetration piece outer wall inspection apparatus - Google Patents
Reactor pressure vessel bottom head penetration piece outer wall inspection apparatus Download PDFInfo
- Publication number
- CN104992734B CN104992734B CN201510264596.0A CN201510264596A CN104992734B CN 104992734 B CN104992734 B CN 104992734B CN 201510264596 A CN201510264596 A CN 201510264596A CN 104992734 B CN104992734 B CN 104992734B
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- China
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- penetration piece
- traverser
- eddy current
- check device
- fixed disk
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/003—Remote inspection of vessels, e.g. pressure vessels
- G21C17/007—Inspection of the outer surfaces of vessels
-
- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses a reactor pressure vessel bottom head penetration piece outer wall inspection apparatus. The apparatus comprises a self-adaptive mechanism used for arranging an eddy current probe and allowing the eddy current probe to always cling to a penetration piece and a bottom head when the eddy current probe rotates around the penetration piece, a first axial driving mechanism for driving the self-adaptive mechanism to move along the axial direction of the penetration piece, a first circumferential driving mechanism for driving the self-adaptive mechanism to move along the circumferential direction of the penetration piece, and a first positioning mechanism for realizing positioning of the outer wall inspection apparatus. The outer wall inspection device has a compact structure and a small size, can be easily and accurately sleeved on the outer wall of the penetration piece or can enter the penetration piece under the driving of an operating platform in order to carry out scanning, and does not generate too large transverse overturning force on the penetration piece due to its small volume weight if the inspection device shakes; and the self-adaptive mechanism of the outer wall inspection device can guarantee that the eddy current probe always clings to the bottom head and the penetration piece in the scanning process in order to obtain accurate inspection data.
Description
Technical field
The present invention relates to nuclear power field of non destructive testing, more particularly to a kind of RPV bottom head penetration piece outer wall
Check device.
Background technology
Nuclear reactor pressure container is one of of paramount importance part of nuclear power station, is RCC-M nuclear safety first devices.Core is anti-
The quality for answering core pressure vessel is the key for ensureing Nuclear Power System safe operation, and being uniquely can not be more in the nuclear power station whole life-span
The large component for changing.To determine the inspection specification and outline of the quality of nuclear reactor pressure container, nuclear power plant and nuclear power unit
In, the Compulsory Feature of Non-Destructive Testing is proposed to each weld seam on reactor pressure vessel and other positions, and specify difference
Before being taken into use front and inservice inspection is used as a servant to reactor pressure vessel enforcement with after operation intervals.It is before labour and in-service
Inspection result is the important evidence of analyzing evaluation pressure vessel running status.
Nuclear reactor pressure container labour is front and inservice inspection is extremely complex process, it is necessary to using special mechanical verification
Equipment and device are completing.Due to the special structure of nuclear reactor pressure container bottom (head) penetration piece, check it needs 19
Carry out under the water environment of meter Shen, and checking process has radioactivity.Additionally, nuclear reactor pressure container bottom (head) penetration piece internal diameter
Only 15.5 millimeters, but check that depth reaches more than 650 millimeters, checking process is popped one's head in its internal motion, to its positioning requirements
It is very high.If check device positioning is inaccurate or unexpected disturbances occur, probe is easily caused in BMI internal breaks so as to pressure
Container causes in itself major hidden danger.Meanwhile, nuclear reactor pressure container bottom (head) penetration piece is distributed in pressure vessel axis
For on 23 different radii circumference in the center of circle, the cambered surface angle of inclination residing for the penetration piece on different circumference is different, outer wall vortex
The track of probe scanning is also different.Therefore, check that outer wall the adaptability of equipment eddy current probe motion has high demands, otherwise, easily
Outer wall eddy current probe is caused to fit with penetration piece J weld seams tight in scanning process or probe bite situation occur.Publication
CN103985424A（Nuclear reactor pressure container Non-Destructive Testing robot and its detection method）、CN203465957U（One seed nucleus
Power station reactor pressure vessel check device）、CN104464849A（A kind of nuclear power plant reactor pressure vessel check device）Deng
Ultrasound or video check can be integrally carried out to reactor pressure vessel, but because BMI inside diameters are little, depth big, is checked
Device cannot complete precise positioning, probe is delivered to and complete inside BMI inspection, meanwhile, the weight of such device is larger,
Any abnormal operation for occurring may all cause BMI structures to be subject to larger power of laterally toppling, so as to the safety for producing huge is hidden
Suffer from.
Publication 201010576226.8（Ultrasonic automatic inspection device for penetrating pipe fitting of top cover of pressure vessel）、
201010591741.3（Television checking camera combination structure for inside of pipe fitting）、201010587911.0（Inside pipe fitting ultrasound inspection
Look into probe combined structure）, United States Patent (USP) 20140211902（INSPECTION APPARATUS FOR PENETRATION PIPE
OF NUCLEAR REACTOR HEAD）Top cover of reactor pressure vessel penetration piece inspection application is primarily directed to etc. such technology,
It can not meet the installation of 19 depths and working environment under water.Additionally, top cover penetration piece structure is significantly larger than bottom (head) penetration piece, inspection
Looking into device positioning difficulty will be far below bottom (head) penetration piece inspection requirements, and sonde configuration also has enough space arrangements.
Paper（1000MW level presurized water reactor reactor pressure vessel CRDM and BMI penetration piece J-type weld joint ultrasonic inspection technologies
Research, the innovation of 2010 Chinese Nuclear Power industry science and technologies and development forum collection of thesis）The inspection technology research of report is mainly for BMI knots
Inspection of the structure under maker environment, had both been not related to the radiation environment at nuclear power station scene, can not realize 19 meters of deep peaces under water
Dress and working environment.
The content of the invention
It is an object of the invention to provide a kind of RPV bottom head penetration piece outer wall check device.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that：A kind of RPV bottom head is passed through
Part outer wall check device is worn, it includes for installing and the eddy current probe is close to all the time when rotating around penetration piece
Adaptive mechanism on penetration piece and bottom (head), the adaptive mechanism is driven along the first axially driving of penetration piece axially-movable
Mechanism, drive the adaptive mechanism along the penetration piece circumferential movement the first circumferential drive mechanism, realize that outer wall inspection is filled
Put the first detent mechanism of positioning and outer wall check device is vertically in water and eddy current probe underlying
One buoyant mass；
First axial actuating mechanism include that upper bottom is oppositely arranged first on fixed disk and the first lower fixed disk, even
It is connected on first between fixed disk and the first lower fixed disk and symmetrically arranged two first guide rails, is slidably connected to two institutes
State the traverser of disc first, the first screw body, the first screw mandrel motor on the first guide rail, the first screw mandrel machine
The screw rod of structure is arranged in first traverser, and its lower end is rotationally connected with first lower fixed disk, and described first
The nut of screw body is fixed in first traverser and is set on the screw rod of first screw body, and described
One screw mandrel motor is fixed on described first on fixed disk；
The first circumferential drive mechanism includes threeth traverser pivotally connected with first traverser and institute
State mutually fixed the 3rd traverser and the 4th traverser that is fixedly and coaxially connected by connecting pole, multiple side borders are offered
V-shaped groove and be distributed in a ring track roller, be arranged in first traverser the first splined shaft, drive described the
The first spline spindle motor that one splined shaft is rotated, it is rotationally connected with the first traverser lower surface and is set in described the
First gear on one splined shaft, the first spline spindle motor be fixed on described first on fixed disk and with described first
The symmetrical setting of bar motor, the 3rd traverser lower surface is provided with and the V-groove on the track roller side
Match and towards the V-type projection of the 3rd traverser axial line, V-type projection is annularly fastened on multiple guide rail rollings
So that the 3rd traverser is rotatably connected in the first traverser on wheel, the 3rd traverser lower surface is additionally provided with ring
The gear ring of shape, the gear ring is meshed with the first gear, and when the first gear is rotated, the 3rd traverser exists
Rotate in first traverser；
The adaptive mechanism is located in the 4th traverser including many and upper end can carry on a shoulder pole and be located at described
Floating guide rail in four traversers is located at described with the floating disc that many floating guide rail lower ends are mutually fixedly connected, two pieces
Floating plate edge and extend downwardly along the floating disc axis direction vertical connecting plate, be rotationally connected with two pieces of vertical connecting plates
Between and rotating shaft and the perpendicular mounting blocks of penetration piece rotating shaft, be arranged on the mounting blocks guide post, be fixed on the peace
Fill on block and axis is oriented to the parallel self adaptation cylinder of rod axis, is fixed on the U-shaped of the guide post bottom with described
Connection frame connects frame phase hinge and the rotating shaft connecting seat parallel with the rotating shaft of the mounting blocks with described, self adaptation cylinder
Piston rod is fixedly connected with the connection frame, and the eddy current probe is rotationally connected with the connecting seat, the rotating shaft of eddy current probe
It is perpendicular with the connecting seat rotating shaft with the penetration piece rotating shaft place plane, the connecting seat and it is described connection frame non-hinge
Extension spring is connected between end, eddy current probe can fluctuate in Rotational scan with bottom (head) curved surfaces.
Optimization, first detent mechanism includes being arranged in the floating disc and the first lower fixed disk is fixed in upper end
Tubular first positioning seat of lower section, the first positioning seat inwall uniformly has multiple first clamping cylinders on sustained height
With first locating piece.
Optimization, first buoyant mass is installed on described first on fixed disk.
Optimization, the difference range of the gravity of buoyancy and the outer wall check device suffered by first buoyant mass for [-
50,50]N。
Further, the difference takes 0N.
The beneficial effects of the present invention is：Outer wall check device compact conformation in the present invention, small volume can be in operation
Easily, be accurately set in penetration piece outer wall under the drive of platform, carry out scanning, due to its volume weight it is little, even if producing rolling
It is dynamic that excessive power of laterally toppling also will not be caused to penetration piece；Adaptive mechanism ensure that eddy current probe begins during scanning
It is close to bottom (head) and penetration piece eventually, obtains and accurately check data；First buoyant mass can make outer wall check device be vertically to pressure
In water in container, it is easy to inspection operation.
Description of the drawings
Accompanying drawing 1 is the three-dimensional view of outer wall check device in the present invention；
Accompanying drawing 2 is the three-dimensional view of the outer wall check device local in the present invention after deprotection cover；
Accompanying drawing 3 is the schematic perspective view of the circumferential drive mechanism of outer wall check device in the present invention；
Accompanying drawing 4 is the sectional view of the circumferential drive mechanism of outer wall check device in the present invention；
Accompanying drawing 5 is the structural representation of the adaptive mechanism of outer wall check device in the present invention；
In accompanying drawing：1st, outer wall check device；3rd, long pole assembly；4th, eddy current probe；5th, penetration piece；6th, bottom (head)；11st, first
Axial actuating mechanism；12nd, the first circumferential drive mechanism；13rd, the first detent mechanism；14th, adaptive mechanism；15th, the first buoyant mass；
16th, the anglec of rotation limits mechanism；111st, fixed disk on first；112nd, the first lower fixed disk；113rd, the first guide rail；114th, first live
Moving platform；115th, the first screw body；116th, the first screw mandrel motor；121st, the 3rd traverser；122nd, connecting pole；123、
4th traverser；124th, track roller；125th, the first splined shaft；126th, the first spline spindle motor；127th, first gear；131、
First positioning seat；140th, protective cover；141st, floating guide rail；142nd, floating disc；143rd, vertical connecting plate；144th, mounting blocks；145th, lead
To bar；146th, self adaptation cylinder；147th, frame is connected；148th, connecting seat；149th, extension spring；161st, limited post；162nd, gag lever post；
1211st, V-type projection；1212nd, gear ring.
Specific embodiment
Below in conjunction with the accompanying drawings shown embodiment is described in detail below to the present invention：
RPV bottom head penetration piece outer wall check device by operating platform, be connected to the operating platform with
Long pole assembly 3 between outer wall check device 1 is delivered on penetration piece 5.
As shown in Figure 1, 2, outer wall check device 1 includes for installing and the eddy current probe 4 is being rotated around penetration piece 5
When can all the time be close to adaptive mechanism 14 on penetration piece 5 and bottom (head) 6, drive the adaptive mechanism 14 along penetration piece
First axial actuating mechanism 11, the driving adaptive mechanism 14 of 5 axially-movables is along the first of the penetration piece circumferential movement
Circumferential drive mechanism 12, the first detent mechanism 13 for realizing the positioning of outer wall check device 1, restriction eddy current probe 4 do circumferential movement
The anglec of rotation of angle limits mechanism 16.
First axial actuating mechanism 11 include that upper bottom is oppositely arranged first on fixed disk 111 and first time fix
Disk 112, be connected on first between the lower fixed disk 112 of fixed disk 111 and first and symmetrically arranged two first guide rails
113rd, be slidably connected to disc the first traverser 114 on two first guide rails 113, the first screw body 115,
One screw mandrel motor 116, the screw rod of first screw body 115 is arranged in first traverser 114, its lower end
It is rotationally connected with first lower fixed disk 112, the nut of first screw body 115 is fixed on first activity puts down
On platform 114 and it is set on the screw rod of first screw body 115, the first screw mandrel motor 116 is fixed on described
On first on fixed disk 111.
As shown in Figure 3,4, the described first circumferential drive mechanism 12 includes pivotally connected with first traverser 114
3rd traverser 121 and the 3rd traverser 121 it is mutually fixed and be fixedly and coaxially connected by connecting pole 122 the 4th
Traverser 123, multiple side borders offer V-shaped groove and be distributed in a ring track roller 124, be arranged in described first
The first splined shaft 125 in traverser 121, drive the first spline spindle motor 126 that first splined shaft 125 rotates, turn
The dynamic first gear 127 for being connected on the lower surface of the first traverser 114 and being set on first splined shaft 125,
The first spline spindle motor 126 be fixed on described first on fixed disk 111 and with the phase of the first screw mandrel motor 116
It is symmetrical arranged, the lower surface of the 3rd traverser 121 is provided with and matches with the V-groove on the side of the track roller 124
And towards the V-type projection 1211 of the axial line of the 3rd traverser 121, V-type projection 1211 is annularly fastened on multiple described
So that the 3rd traverser 121 is rotatably connected in the first traverser 114 on track roller 124, the 3rd activity is flat
The lower surface of platform 121 is additionally provided with the gear ring 1212 of ring-type, and the gear ring 1212 is meshed with the first gear 127, when described
When one gear 127 is rotated, the 3rd traverser 121 is rotated in the first traverser 114.
As shown in figure 5, being covered with protective cover 140 outside the adaptive mechanism 14, it includes that many are located in the described 4th
In traverser 123 and upper end can carry on a shoulder pole the floating guide rail 141 that is located in the 4th traverser 123 and many described floating
142, two pieces of the floating disc that the lower end of dynamic guide rail 141 is mutually fixedly connected is located at the edge of the floating disc 142 and along the floating disc 142
Vertical connecting plate 143 that axis direction is extended downwardly, it is rotationally connected between two pieces of vertical connecting plates 143 and rotating shaft and penetration piece
The perpendicular mounting blocks 144 of rotating shaft, it is arranged on the mounting blocks 144 and diagonally lower and towards penetration piece direction extends
Guide post 145, it is fixed on the mounting blocks 144 and the axis self adaptation cylinder parallel with the axis of the guide post 145
146th, it is fixed on the U-shaped connection frame 147 of the bottom of the guide post 145 and connects the phase hinge of frame 147 and rotating shaft and institute with described
The parallel connecting seat 148 of the rotating shaft of mounting blocks 144 is stated, the eddy current probe 4 is rotationally connected with the connecting seat 148, from
The piston rod for adapting to cylinder 146 is fixedly connected with the connection frame 147, the rotating shaft of the rotating shaft of eddy current probe 4 and the penetration piece 5
Place plane is perpendicular with the rotating shaft of the connecting seat 148, the connecting seat 148 and it is described connection frame 147 non-hinged end it
Between be connected with extension spring 149, eddy current probe 4 can fluctuate in Rotational scan with bottom (head) curved surfaces.
First detent mechanism 13 includes being arranged in the floating disc 142 and the first lower fixed disk is fixed in upper end
Tubular first positioning seat 131 of 112 lower sections, the inwall of the first positioning seat 131 uniformly has multiple the on sustained height
One clamping cylinder（Do not show in figure）With first locating piece（Do not show in figure）.
The upper end of the outer wall check device 1 is provided with the first buoyant mass 15, and in the present embodiment, the first buoyant mass 15 is covered
It is located on first on fixed disk 111, the difference of the gravity of buoyancy and the outer wall check device 1 suffered by first buoyant mass 15
Scope is [- 50,50] N, most preferably takes 0N, and due to the distribution of each parts uniformity of outer wall check device 1, therefore its center of gravity is substantially in its axle
On line, the first buoyant mass 15 is located at its upper end and on axis, effectively can must keep its balance in water, makes positioning
Operation is simpler.
Above-described embodiment technology design only to illustrate the invention and feature, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and implement according to this, can not be limited the scope of the invention with this.It is all according to the present invention
Equivalence changes or modification that spirit is made, all should be included within the scope of the present invention.
Claims (5)
1. a kind of RPV bottom head penetration piece outer wall check device, it is characterised in that：It is included for installing simultaneously
Enable adaptive mechanism that eddy current probe is close to all the time on penetration piece and bottom (head) when rotating around penetration piece, drive it is described
Adaptive mechanism along penetration piece axially-movable the first axial actuating mechanism, drive the adaptive mechanism along penetration piece week
The first circumferential drive mechanism to motion, realize the first detent mechanism and make outer wall check device that outer wall check device positions
Can be vertically in water and underlying first buoyant mass of eddy current probe；
First axial actuating mechanism include upper bottom be oppositely arranged first on fixed disk and the first lower fixed disk, be connected to
On first between fixed disk and the first lower fixed disk and symmetrically arranged two first guide rails, be slidably connected to two described
The traverser of disc first, the first screw body on one guide rail, the first screw mandrel motor, first screw body
Screw rod is arranged in first traverser, and its lower end is rotationally connected with first lower fixed disk, first screw mandrel
The nut of mechanism is fixed in first traverser and is set on the screw rod of first screw body, described first
Bar motor is fixed on described first on fixed disk；
The first circumferential drive mechanism includes threeth traverser pivotally connected with first traverser and described the
Three traversers are mutually fixed and the 4th traverser that is fixedly and coaxially connected by connecting pole, multiple side borders are offered in V
Type groove and be distributed in a ring track roller, be arranged in first traverser the first splined shaft, drive described first
The first spline spindle motor that splined shaft is rotated, it is rotationally connected with the first traverser lower surface and is set in described first
First gear on splined shaft, the first spline spindle motor be fixed on described first on fixed disk and with first screw mandrel
The symmetrical setting of motor, the 3rd traverser lower surface is provided with and the V-groove phase on the track roller side
Match and towards the V-type projection of the 3rd traverser axial line, V-type projection is annularly fastened on multiple track rollers
Above so that the 3rd traverser is rotatably connected in the first traverser, the 3rd traverser lower surface is additionally provided with ring-type
Gear ring, the gear ring is meshed with the first gear, and when the first gear is rotated, the 3rd traverser is
Rotate in one traverser；
The adaptive mechanism is located in the 4th traverser including many and upper end can carry on a shoulder pole and be located at the 4th work
Floating disc that floating guide rail on moving platform is mutually fixedly connected with many floating guide rail lower ends, two pieces be located at the floating
Plate edge and extend downwardly along the floating disc axis direction vertical connecting plate, be rotationally connected between two pieces of vertical connecting plates
And rotating shaft and the perpendicular mounting blocks of penetration piece rotating shaft, be arranged on the mounting blocks guide post, be fixed on the mounting blocks
The upper and axis self adaptation cylinder parallel with the guiding rod axis, the U-shaped connection for being fixed on the guide post bottom
Frame connects frame phase hinge and the rotating shaft connecting seat parallel with the rotating shaft of the mounting blocks, the piston of self adaptation cylinder with described
Bar is fixedly connected with the connection frame, and the eddy current probe is rotationally connected with the connecting seat, the rotating shaft of eddy current probe and institute
State penetration piece rotating shaft place plane perpendicular with the connecting seat rotating shaft, the connecting seat and it is described connection frame non-hinged end it
Between be connected with extension spring, eddy current probe can fluctuate in Rotational scan with bottom (head) curved surfaces.
2. RPV bottom head penetration piece outer wall check device according to claim 1, it is characterised in that：Institute
State that the first detent mechanism includes being arranged in the floating disc and upper end is fixed on below the first lower fixed disk tubular the
One positioning seat, the first positioning seat inwall uniformly has multiple first clamping cylinders and one first positioning on sustained height
Block.
3. RPV bottom head penetration piece outer wall check device according to claim 1, it is characterised in that：Institute
State the first buoyant mass to be installed on described first on fixed disk.
4. RPV bottom head penetration piece outer wall check device according to claim 1, it is characterised in that：Institute
The difference range for stating the gravity of buoyancy suffered by the first buoyant mass and the outer wall check device is [- 50,50] N.
5. RPV bottom head penetration piece outer wall check device according to claim 4, it is characterised in that：Institute
State difference and take 0N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264596.0A CN104992734B (en) | 2015-05-22 | 2015-05-22 | Reactor pressure vessel bottom head penetration piece outer wall inspection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264596.0A CN104992734B (en) | 2015-05-22 | 2015-05-22 | Reactor pressure vessel bottom head penetration piece outer wall inspection apparatus |
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| Publication Number | Publication Date |
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| CN104992734A CN104992734A (en) | 2015-10-21 |
| CN104992734B true CN104992734B (en) | 2017-05-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925951B (en) * | 2016-07-07 | 2018-08-24 | 成都国泰真空设备有限公司 | A kind of six chip crystalline substance control devices |
| CN107991382B (en) * | 2017-10-16 | 2024-04-05 | 中广核检测技术有限公司 | Eddy current inspection device |
| CN109979623A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of scanner for revolving parts inner surface non-destructive testing |
| CN110878835B (en) * | 2019-11-27 | 2021-08-06 | 大连中歆一品机械有限公司 | Quick door opener of pressure storage tank |
| CN111554417A (en) * | 2020-04-10 | 2020-08-18 | 中核武汉核电运行技术股份有限公司 | Device and method for video inspection of upper surface of top cover |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2544540B1 (en) * | 1983-04-13 | 1985-10-25 | Commissariat Energie Atomique | MACHINE FOR EXAMINING A NUCLEAR REACTOR FUEL ASSEMBLY |
| DE4215700C2 (en) * | 1992-05-13 | 1994-03-10 | Bbc Reaktor Gmbh | Method and device for the non-destructive testing of the implementation of a reactor pressure vessel cover |
| CN201936625U (en) * | 2010-12-14 | 2011-08-17 | 核动力运行研究所 | Ultrasonic examination probe composite structure inside pipe fitting |
| CN201936626U (en) * | 2010-12-16 | 2011-08-17 | 核动力运行研究所 | Television inspection camera combined structure in pipe fitting |
| CN204302236U (en) * | 2014-12-30 | 2015-04-29 | 中核武汉核电运行技术股份有限公司 | A kind of vacuum cap type small-caliber pipeline inwall water logging ultrasonic inspection apparatus |
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