CN104992734A - 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
- CN104992734A CN104992734A CN201510264596.0A CN201510264596A CN104992734A CN 104992734 A CN104992734 A CN 104992734A CN 201510264596 A CN201510264596 A CN 201510264596A CN 104992734 A CN104992734 A CN 104992734A
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- CN
- China
- Prior art keywords
- penetration piece
- movable platform
- eddy current
- testing fixture
- current probe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
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, particularly a kind of RPV bottom head penetration piece outer wall testing fixture.
Background technology
Nuclear reactor pressure container is one of of paramount importance parts of nuclear power station, is RCC-M nuclear safety first device.The quality of nuclear reactor pressure container is the key ensureing Nuclear Power System safe operation, is large component uniquely non-exchange in the nuclear power station whole life-span.For the quality of definite kernel reactor pressure vessel, in the inspection specification of nuclear power plant and nuclear power unit and outline, each weld seam on reactor pressure vessel and other position are proposed to the Compulsory Feature of Non-Destructive Testing, and appointment is implemented to use as a servant front and inservice inspection respectively before being taken into use and after running certain hour interval to reactor pressure vessel.The important evidence of analyzing evaluation pressure vessel running status with inservice inspection result before labour.
Nuclear reactor pressure container labour is front is very complicated process with inservice inspection, and special mechanical verification equipment and device must be used.Due to the structure that nuclear reactor pressure container bottom (head) penetration piece is special, it is checked and needs to carry out under 19 meters of dark water environments, and checking process has radioactivity.In addition, nuclear reactor pressure container bottom (head) penetration piece internal diameter is only 15.5 millimeters, but checks that the degree of depth reaches more than 650 millimeters, and checking process probe moves therein, very high to its positioning requirements.If testing fixture location is inaccurate or the disturbance that meets accident, easily causes probe at BMI internal break thus cause major hidden danger to pressure vessel itself.Meanwhile, nuclear reactor pressure container bottom (head) penetration piece is distributed in pressure vessel axis 23 different radiis that are the center of circle circumferentially, and the different cambered surface angle of inclination residing for penetration piece is circumferentially different, and the track of outer wall eddy current probe scanning is also different.Therefore, require high to the adaptability of outer wall checkout facility eddy current probe motion, otherwise, easily cause outer wall eddy current probe fit not tight in scanning process and penetration piece J weld seam or occur bite situation of popping one's head in.Publication CN103985424A(nuclear reactor pressure container Non-Destructive Testing robot and detection method thereof), CN203465957U(nuclear power plant reactor pressure vessel testing fixture), CN104464849A(nuclear power plant reactor pressure vessel testing fixture) etc. can carry out ultrasonic or video check to reactor pressure vessel entirety, but because BMI inside diameter is little, the degree of depth is large, testing fixture cannot complete precise positioning, probe is delivered to BMI inside and complete inspection, simultaneously, the weight of this kind equipment or device is larger, the any abnormal operation occurred all may cause BMI structure to be subject to larger transverse direction toppling power, thus produce huge potential safety hazard.
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(ultrasonic detection probe combined structure in pipe fitting), United States Patent (USP) 20140211902(INSPECTION APPARATUS FOR PENETRATION PIPE OF NUCLEAR REACTOR HEAD) etc. this type of technology mainly for top cover of reactor pressure vessel penetration piece inspection application, it can not meet 19 dark installations and operating environment under water.In addition, top cover penetration piece structure will much larger than bottom (head) penetration piece, and testing fixture positioning difficulty will far below the inspection requirements of bottom (head) penetration piece, and sonde configuration also has enough spaces to arrange.
Paper (1000MW level presurized water reactor reactor pressure vessel CRDM and the research of BMI penetration piece J type weld joint ultrasonic inspection technology, 2010 Chinese Nuclear Power industry science and technology innovating and developing forum collections of thesis) report inspection technology research mainly for the inspection of BMI structure under manufacturing plant's environment, neither relate to the radiation environment at nuclear power station scene, 19 meters of dark installations and operating environment under water can not be realized.
Summary of the invention
The object of this invention is to provide a kind of RPV bottom head penetration piece outer wall testing fixture.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of RPV bottom head penetration piece outer wall testing fixture, it comprises for installing and enabling described eddy current probe be close to adaptive mechanism on penetration piece and bottom (head) all the time when rotating around penetration piece, drive described adaptive mechanism along the first axial actuating mechanism of penetration piece axially-movable, drive described adaptive mechanism along the first circumferential driving mechanism of described penetration piece circumferential movement, realize the first detent mechanism of outer wall testing fixture location and outer wall testing fixture be vertically in water and eddy current probe is positioned at the first buoyant mass of below,
Described first axial actuating mechanism comprise that bottom is oppositely arranged first on shaft collar and the first lower fixed disk, be connected on first between shaft collar and the first lower fixed disk and symmetrically arranged two first guide rails, be slidably connected to disc first movable platform on two described first guide rails, first screw body, first screw mandrel drive motor, the screw rod of described first screw body is arranged in described first movable platform, its lower end is rotationally connected with on described first lower fixed disk, the nut of described first screw body to be fixed in described first movable platform and to be set on the screw rod of described first screw body, described first screw mandrel drive motor to be fixed on described first on shaft collar,
Described first circumferential driving mechanism comprises three movable platform pivotally connected with described first movable platform, fix with described 3rd movable platform and the 4th movable platform be coaxially fixedly connected with by joint pin, border, multiple side offers V-shaped groove and the track roller distributed ringwise, be arranged in the first splined shaft in described first movable platform, drive the first splined shaft motor that described first splined shaft rotates, to be rotationally connected with on described first movable platform lower surface and the first gear be set on described first splined shaft, described first splined shaft motor to be fixed on described first on shaft collar and with the symmetrical setting of described first screw mandrel drive motor, described 3rd movable platform lower surface is provided with and matches with the V-type groove on described track roller side and towards the V-type projection of described 3rd movable platform axial line, V-type projection to be fastened in the form of a ring on multiple described track roller thus to make the 3rd movable platform be rotatably connected in the first movable platform, described 3rd movable platform lower surface is also provided with the gear ring of ring-type, described gear ring is meshed with described first gear, when described first pinion rotation, described 3rd movable platform is rotated in the first movable platform,
Described adaptive mechanism comprises many and to be located in described 4th movable platform and the floating guide rail be located in described 4th movable platform can be carried on a shoulder pole in upper end, the floating disc be fixedly connected with many described floating guide rail lower ends, two pieces are positioned at described floating disc edge and along described floating disc axis direction to the vertical connecting plate of downward-extension, to be rotationally connected with between two pieces of described vertical connecting plates and rotating shaft and the perpendicular mounting blocks of penetration piece rotating shaft, be arranged in the guide pole on described mounting blocks, to be fixed on described mounting blocks and the self-adaptation cylinder that parallels with described guide pole axis of axis, be fixed on the U-shaped connection box of described guide pole bottom, with described connection box phase hinge and the Connection Block that parallels with the rotating shaft of described mounting blocks of rotating shaft, the piston rod of self-adaptation cylinder is fixedly connected with described connection box, described eddy current probe is rotationally connected with on described Connection Block, the rotating shaft of eddy current probe and described penetration piece rotating shaft place plane and described Connection Block rotating shaft perpendicular, extension spring is connected with between described Connection Block and the non-hinged end of described connection box, eddy current probe is when Rotational scan, can fluctuate with bottom (head) curved surfaces.
Optimize, described first detent mechanism comprises and to be arranged in described floating disc and tubular first positioning seat below the first lower fixed disk is fixed in upper end, and described first positioning seat inwall evenly has multiple first clamping cylinder and first locating piece on sustained height.
Optimize, described first buoyant mass to be installed on described first on shaft collar.
Optimize, the difference range of the gravity of buoyancy and described outer wall testing fixture suffered by described first buoyant mass is [-50,50] N.
Further, described difference gets 0N.
Beneficial effect of the present invention is: outer wall testing fixture compact conformation in the present invention, small volume, easily, accurately penetration piece outer wall can be set under the drive of operating platform, carry out scanning, because its volume weight is little, also excessive transverse direction will be caused to topple power to penetration piece even if produce to rock; Adaptive mechanism can ensure that eddy current probe is close to bottom (head) and penetration piece all the time in scanning process, obtains and checks data accurately
; First buoyant mass can makeouter wall testing fixture is vertically in the water in pressure vessel, is easy to inspection operation.
Accompanying drawing explanation
Accompanying drawing 1 is the three-dimensional view of outer wall testing fixture in the present invention;
Accompanying drawing 2 is the three-dimensional view of the outer wall testing fixture local after removing protective cover in the present invention;
Accompanying drawing 3 is the schematic perspective view of the circumferential driving mechanism of outer wall testing fixture in the present invention;
Accompanying drawing 4 is the cut-open view of the circumferential driving mechanism of outer wall testing fixture in the present invention;
Accompanying drawing 5 is the structural representation of the adaptive mechanism of outer wall testing fixture in the present invention;
In accompanying drawing: 1, outer wall testing fixture; 3, stock assembly; 4, eddy current probe; 5, penetration piece; 6, bottom (head); 11, the first axial actuating mechanism; 12, the first circumferential driving mechanism; 13, the first detent mechanism; 14, adaptive mechanism; 15, the first buoyant mass; 16, the anglec of rotation limits mechanism; 111, shaft collar on first; 112, the first lower fixed disk; 113, the first guide rail; 114, the first movable platform; 115, the first screw body; 116, the first screw mandrel drive motor; 121, the 3rd movable platform; 122, joint pin; 123, the 4th movable platform; 124, track roller; 125, the first splined shaft; 126, the first splined shaft motor; 127, the first gear; 131, the first positioning seat; 140, protective cover; 141, floating guide rail; 142, floating disc; 143, vertical connecting plate; 144, mounting blocks; 145, guide pole; 146, self-adaptation cylinder; 147, connection box; 148, Connection Block; 149, extension spring; 161, limited post; 162, gag lever post; 1211, V-type projection; 1212, gear ring.
Embodiment
Below in conjunction with embodiment shown in the drawings, the present invention is described in detail below:
RPV bottom head penetration piece outer wall testing fixture is delivered on penetration piece 5 by operating platform, the stock assembly 3 be connected between described operating platform and outer wall testing fixture 1.
As shown in Figure 1, 2, outer wall testing fixture 1 comprise for install and enable described eddy current probe 4 be close to adaptive mechanism 14 on penetration piece 5 and bottom (head) 6 all the time when rotating around penetration piece 5, drive described adaptive mechanism 14 along penetration piece 5 axially-movable the first axial actuating mechanism 11, drive described adaptive mechanism 14 along described penetration piece circumferential movement the first circumferential driving mechanism 12, realize the first detent mechanism 13 that outer wall testing fixture 1 locates, limit the anglec of rotation that eddy current probe 4 does circumferential movement angle and limit mechanism 16.
Described first axial actuating mechanism 11 comprise that bottom is oppositely arranged first on shaft collar 111 and the first lower fixed disk 112, be connected on first between shaft collar 111 and the first lower fixed disk 112 and symmetrically arranged two first guide rails 113, be slidably connected to disc first movable platform 114 on two described first guide rails 113, first screw body 115, first screw mandrel drive motor 116, the screw rod of described first screw body 115 is arranged in described first movable platform 114, its lower end is rotationally connected with on described first lower fixed disk 112, the nut of described first screw body 115 to be fixed in described first movable platform 114 and to be set on the screw rod of described first screw body 115, described first screw mandrel drive motor 116 to be fixed on described first on shaft collar 111.
As Fig. 3, shown in 4, described first circumferential driving mechanism 12 comprises three movable platform 121 pivotally connected with described first movable platform 114, fix with described 3rd movable platform 121 and the 4th movable platform 123 be coaxially fixedly connected with by joint pin 122, border, multiple side offers V-shaped groove and the track roller 124 distributed ringwise, be arranged in the first splined shaft 125 in described first movable platform 121, drive the first splined shaft motor 126 that described first splined shaft 125 rotates, to be rotationally connected with on described first movable platform 114 lower surface and the first gear 127 be set on described first splined shaft 125, described first splined shaft motor 126 to be fixed on described first on shaft collar 111 and with the symmetrical setting of described first screw mandrel drive motor 116, described 3rd movable platform 121 lower surface is provided with and matches with the V-type groove on described track roller 124 side and towards the V-type projection 1211 of described 3rd movable platform 121 axial line, V-type projection 1211 to be fastened in the form of a ring on multiple described track roller 124 thus to make the 3rd movable platform 121 be rotatably connected in the first movable platform 114, described 3rd movable platform 121 lower surface is also provided with the gear ring 1212 of ring-type, described gear ring 1212 is meshed with described first gear 127, when described first gear 127 rotates, described 3rd movable platform 121 is rotated in the first movable platform 114.
As shown in Figure 5, protective cover 140 is covered with outside described adaptive mechanism 14, it comprises many and to be located in described 4th movable platform 123 and the floating guide rail 141 be located in described 4th movable platform 123 can be carried on a shoulder pole in upper end, the floating disc 142 be fixedly connected with many described floating guide rail 141 lower ends, two pieces are positioned at described floating disc 142 edge and along described floating disc 142 axis direction to the vertical connecting plate 143 of downward-extension, to be rotationally connected with between two pieces of described vertical connecting plates 143 and rotating shaft and the perpendicular mounting blocks 144 of penetration piece rotating shaft, to be arranged on described mounting blocks 144 and guide pole 145 that is diagonally lower and that extend towards the direction of penetration piece, to be fixed on described mounting blocks 144 and the self-adaptation cylinder 146 that parallels with described guide pole 145 axis of axis, be fixed on the U-shaped connection box 147 of described guide pole 145 bottom, with described connection box 147 phase hinge and the Connection Block 148 that parallels with the rotating shaft of described mounting blocks 144 of rotating shaft, described eddy current probe 4 is rotationally connected with on described Connection Block 148, the piston rod of self-adaptation cylinder 146 is fixedly connected with described connection box 147, the rotating shaft of the rotating shaft of eddy current probe 4 and the rotating shaft place plane of described penetration piece 5 and described Connection Block 148 is perpendicular, extension spring 149 is connected with between described Connection Block 148 and the non-hinged end of described connection box 147, eddy current probe 4 is when Rotational scan, can fluctuate with bottom (head) curved surfaces.
Described first detent mechanism 13 comprises and to be arranged in described floating disc 142 and tubular first positioning seat 131 below the first lower fixed disk 112 is fixed in upper end, and described first positioning seat 131 inwall evenly has multiple first clamping cylinder (not shown) and a first locating piece (not shown) on sustained height.
The upper end of described outer wall testing fixture 1 is provided with the first buoyant mass 15, in the present embodiment, first buoyant mass 15 to be located on first on shaft collar 111, suffered by described first buoyant mass 15, the difference range of the gravity of buoyancy and described outer wall testing fixture 1 is [-50,50] N, the best gets 0N, due to each parts uniformity distribution of outer wall testing fixture 1, therefore its center of gravity roughly on its axis, first buoyant mass 15 is positioned at its upper end and is positioned on axis, effectively can must keep its balance in water, make positioning action simpler.
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 RPV bottom head penetration piece outer wall testing fixture, it is characterized in that: it comprises for installing and enabling described eddy current probe be close to adaptive mechanism on penetration piece and bottom (head) all the time when rotating around penetration piece, drive described adaptive mechanism along the first axial actuating mechanism of penetration piece axially-movable, drive described adaptive mechanism along the first circumferential driving mechanism of described penetration piece circumferential movement, realize the first detent mechanism of outer wall testing fixture location and outer wall testing fixture be vertically in water and eddy current probe is positioned at the first buoyant mass of below,
Described first axial actuating mechanism comprise that bottom is oppositely arranged first on shaft collar and the first lower fixed disk, be connected on first between shaft collar and the first lower fixed disk and symmetrically arranged two first guide rails, be slidably connected to disc first movable platform on two described first guide rails, first screw body, first screw mandrel drive motor, the screw rod of described first screw body is arranged in described first movable platform, its lower end is rotationally connected with on described first lower fixed disk, the nut of described first screw body to be fixed in described first movable platform and to be set on the screw rod of described first screw body, described first screw mandrel drive motor to be fixed on described first on shaft collar,
Described first circumferential driving mechanism comprises three movable platform pivotally connected with described first movable platform, fix with described 3rd movable platform and the 4th movable platform be coaxially fixedly connected with by joint pin, border, multiple side offers V-shaped groove and the track roller distributed ringwise, be arranged in the first splined shaft in described first movable platform, drive the first splined shaft motor that described first splined shaft rotates, to be rotationally connected with on described first movable platform lower surface and the first gear be set on described first splined shaft, described first splined shaft motor to be fixed on described first on shaft collar and with the symmetrical setting of described first screw mandrel drive motor, described 3rd movable platform lower surface is provided with and matches with the V-type groove on described track roller side and towards the V-type projection of described 3rd movable platform axial line, V-type projection to be fastened in the form of a ring on multiple described track roller thus to make the 3rd movable platform be rotatably connected in the first movable platform, described 3rd movable platform lower surface is also provided with the gear ring of ring-type, described gear ring is meshed with described first gear, when described first pinion rotation, described 3rd movable platform is rotated in the first movable platform,
Described adaptive mechanism comprises many and to be located in described 4th movable platform and the floating guide rail be located in described 4th movable platform can be carried on a shoulder pole in upper end, the floating disc be fixedly connected with many described floating guide rail lower ends, two pieces are positioned at described floating disc edge and along described floating disc axis direction to the vertical connecting plate of downward-extension, to be rotationally connected with between two pieces of described vertical connecting plates and rotating shaft and the perpendicular mounting blocks of penetration piece rotating shaft, be arranged in the guide pole on described mounting blocks, to be fixed on described mounting blocks and the self-adaptation cylinder that parallels with described guide pole axis of axis, be fixed on the U-shaped connection box of described guide pole bottom, with described connection box phase hinge and the Connection Block that parallels with the rotating shaft of described mounting blocks of rotating shaft, the piston rod of self-adaptation cylinder is fixedly connected with described connection box, described eddy current probe is rotationally connected with on described Connection Block, the rotating shaft of eddy current probe and described penetration piece rotating shaft place plane and described Connection Block rotating shaft perpendicular, extension spring is connected with between described Connection Block and the non-hinged end of described connection box, eddy current probe is when Rotational scan, can fluctuate with bottom (head) curved surfaces.
2. RPV bottom head penetration piece outer wall testing fixture according to claim 1, it is characterized in that: described first detent mechanism comprises and to be arranged in described floating disc and tubular first positioning seat below the first lower fixed disk is fixed in upper end, and described first positioning seat inwall evenly has multiple first clamping cylinder and first locating piece on sustained height.
3. RPV bottom head penetration piece outer wall testing fixture according to claim 1, is characterized in that: described first buoyant mass to be installed on described first on shaft collar.
4. RPV bottom head penetration piece outer wall testing fixture according to claim 1, is characterized in that: the difference range of the gravity of buoyancy and described outer wall testing fixture suffered by described first buoyant mass is [-50,50] N.
5. RPV bottom head penetration piece outer wall testing fixture according to claim 4, is characterized in that: described difference gets 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| CN104992734A true CN104992734A (en) | 2015-10-21 |
| CN104992734B CN104992734B (en) | 2017-05-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925951A (en) * | 2016-07-07 | 2016-09-07 | 成都国泰真空设备有限公司 | Crystal control device with six wafers |
| 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 |
| 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 |
| CN110878835A (en) * | 2019-11-27 | 2020-03-13 | 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104992734B (en) | 2017-05-17 |
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