CN104751914B - Non-destructive inspection circumferential position correction method for thread hole belt of nuclear reactor pressure vessel - Google Patents
Non-destructive inspection circumferential position correction method for thread hole belt of nuclear reactor pressure vessel Download PDFInfo
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- CN104751914B CN104751914B CN201310751154.XA CN201310751154A CN104751914B CN 104751914 B CN104751914 B CN 104751914B CN 201310751154 A CN201310751154 A CN 201310751154A CN 104751914 B CN104751914 B CN 104751914B
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- circumferential position
- reactor pressure
- nuclear reactor
- scanning
- dolly
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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
- G21C17/013—Inspection vehicles
-
- 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)
Abstract
The invention belongs to the technical field of automatic ultrasonic non-destructive inspection for a thread hole belt of nuclear reactor pressure vessels, and particularly discloses a non-destructive inspection circumferential position correction method for the thread hole belt of a nuclear reactor pressure vessel. The non-destructive inspection circumferential position correction method comprises the following steps: step 1. setting a plurality of key slots supporting steps on the nuclear reactor pressure vessel to position references; step 2. installing induction components in the key slots set to the position references; step 3. when a non-destructive inspection trolley for the thread hole belt of the nuclear reactor pressure vessel passes through the induction components, providing the real circumferential position of a scanning trolley by the induction components; and step 4. comparing the real circumferential position of the trolley, which is provided by the induction components with a measured circumferential position which is measured during the own movement process of the trolley by the scanning trolley to carry out circumferential position correction. According to the non-destructive inspection circumferential position correction method disclosed by the invention, the errors of inspection for the circumferential movement position of the trolley can be timely eliminated, the scanning inspection accuracy can be improved, potential safety hazards can be timely found, accurate location can be realized, and a support is provided for the subsequent working.
Description
Technical field
The invention belongs to nuclear reactor pressure container screwed hole band automatic ultrasonic nondestructive inspection (NDI) technical field.
Background technology
Nuclear reactor pressure container screwed hole band is located at container the top, and several bolts hole are uniform-distribution with above, presses
In run duration, top cover is detained in its top to force container, and blending bolt nut is fastened.Between bolt hole and Kong Yukong contact bands
The quality of material property directly affects the fastening reliability of pressure vessel and top cover, and then affects the safety of pressure vessel
Energy.Require according to ARSM, it is desirable to periodically Non-Destructive Testing is carried out to screwed hole band.
Periodically have many kinds to the method that screwed hole band carries out Non-Destructive Testing, one kind therein be using check dolly along
Pressure container flange does circumferential movement, and scanography mode carries out circumferential movement to check dolly itself, and it is little to be installed on inspection
Two scanning arms of car are radial and axial while stepping, carries out omnibearing scanography.Due to checking dolly circumferential movement
Frequently with friction wheel drive, that is, check that dolly is contacted using friction pulley with inspected object.Movement control mode adopts tape terminal
The double-closed-loop control of encoder, the encoded radio of terminal encoder is to lean on the encoder wheel contacted with pressure vessel to obtain, encoder
Contact quality of the wheel with pressure vessel directly affects terminal encoded radio, and then the inspection dolly for affecting to be obtained during circumferential movement is worked as
The precision of front position.Due to the principle of this kind of wheel motion mode, between wheel and inspected object, outside rolling movement, can also
Slip is produced, this slip will not be encoded device wheel coding, so as to produce error, also, encoder wheel with scanning step number
Increase, this error can be accumulated, and then affect scanning precision.
The content of the invention
The present invention seeks to be directed to the circumferential movement that nuclear reactor pressure container screwed hole checks dolly with automatic ultrasonic, carry
For a kind of aligning and cumulative error removing method, to improve scanography precision.
What the present invention was achieved by：
A kind of nuclear reactor pressure container screwed hole band nondestructive inspection (NDI) circumferential position antidote, wherein,
Step 1, multiple keyways of support level on nuclear reactor pressure container are set as into position reference；
Step 2, it is being set as that sensing element is installed inside the keyway of position reference；
Step 3, the lossless scanning dolly of nuclear reactor pressure container screwed hole band pass through the sensing element when, sensing unit
Part provides the true circumferential position of scanning dolly；
Step 4, the true circumferential position of dolly and dolly displacement process that the offer of car dolly self induction in future element is provided
The measurement circumferential position of middle measurement is compared, and carries out circumferential position correction.
Nuclear reactor pressure container screwed hole band nondestructive inspection (NDI) circumferential position antidote as described above, wherein, described
In step 4, if true circumferential position is more than specified threshold with the deviation of measurement circumferential position, using true circumferential position
The little truck position of scanning is corrected.
The invention is characterised in that：
1）Make benchmark using 4 keyways of support level on nuclear reactor pressure container
Dolly 3 is checked on pressure vessel 1 during circumferential movement, can by the use of the 4 of upper support level keyways 2 as benchmark,
And can pass through the feedback signal of sensing element 4.
2）Differentiated using sensing elements such as proximity switch, limit switch, ultrasonic switches upper in reactor pressure vessel
4 keyways of support step
When checking that dolly 3 is moved near 4 keyways 2 of support level on pressure vessel, sensing element 4 can produce one
Individual signal.
3）Every time circumferential movement is demarcated during circumference stepping
During inspection, by equitable subsection, it is ensured that each scanning section at least includes a keyway 2, when inspection dolly 3 passes through key
During groove 2, sensing element 4 can feed back a signal and pass to control system, and now circumferential movement is demarcated, it is ensured that every time
When checking the walking of dolly 3 to keyway 2, the circumferential coordinate of control system is actual value, it is to avoid the accumulation of circumferential error.
4）Circumferential position is corrected and error cancelling method
Check that dolly 3 can run according to the flow chart shown in Fig. 2, and circumferential position correction and error concealment can be carried out.
It is an advantage of the current invention that the circumferential fortune of dolly is checked with automatic ultrasonic for nuclear reactor pressure container screwed hole
Dynamic aligning and cumulative error are eliminated and propose a kind of solution, can in time eliminate the circumferential movement position for checking dolly
Error, improve scanography precision, potential safety hazard is found in time, and be accurately positioned, provide support for follow-up work.
Description of the drawings
Fig. 1 nuclear reactor pressure containers screwed hole band automatic ultrasonic checks dolly working state schematic representation.
The correction of Fig. 2 circumferential positions and error cancelling method are applied to the flow chart of whole scanning process.
Wherein, 1, pressure vessel, 2, support level keyway on pressure vessel, 3, check dolly, 4, sensing element.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is described further.
As shown in figure 1, check that dolly is scanned inspection on nuclear reactor pressure container screwed hole band, along reactor
Pressure vessel circumferential movement.
Nuclear reactor pressure container screwed hole band nondestructive inspection (NDI) circumferential position antidote of the present invention includes following several
Individual step：
Step 1）4 keyways of support level are used as position reference by the use of on nuclear reactor pressure container.
Due to checking dolly 3 when automatic ultrasonic inspection is carried out to pressure vessel screwed hole band, scanning mode is circumferential fortune
It is dynamic, two scanning arms it is radial and axial while stepping.Meanwhile, the circumferential movement form of dolly 3 is checked for friction wheel transmission, control
Mode adopts the double-closed-loop control of tape terminal encoder, but the motion reality of encoder wheel is also frictional wheel drive, therefore circumferentially
There is certain error in motion.With the increase of step number, this error will produce accumulation, and then affect scanning precision.
This patent checks dolly fortune as benchmark, every time by the use of 4 keyways 2 of support level on nuclear reactor pressure container
When moving the benchmark, control system can feed back signal, used as the reference of signal processing.
Step 2）Differentiated in reactor pressure vessel using the sensing elements such as proximity switch, limit switch, ultrasonic switch 4
4 keyways of upper support level.
When checking that dolly 3 is moved near 4 keyways 2 of support level on pressure vessel, using proximity switch, spacing
Feedback signal is passed to scanning trolley control system differentiating by the sensing elements such as switch, ultrasonic switch 4, obtains scanning dolly
True circumferential position.
Step 3）Every time circumferential movement is demarcated during circumference stepping.
During inspection, by equitable subsection, it is ensured that each scanning section at least includes a keyway 2, when inspection dolly 3 passes through key
During groove 2, sensing element 4 can feed back a signal and pass to control system, and now circumferential movement is demarcated, it is ensured that every time
When checking the walking of dolly 3 to keyway 2, the circumferential coordinate of control system is actual value, it is to avoid the accumulation of circumferential error.
Step 4）Circumferential position is corrected and error cancelling method
Circumferential position correct and error cancelling method stream as shown in Fig. 2 first to check dolly 3 carry out circumferential initial alignment,
Again slow circumferential mobile inspection dolly 3 is near keyway 2, and records circumferential coordinate during 4 value changes of sensing element, then will check
Dolly 3 moves to scanning initial point position, arranges scanning path and step number N, and starts scanning.
When checking that dolly 3 moves to keyway 2, the relation of circumferential position now and actual value is contrasted, if deviation
More than the threshold value of setting, circumferential position correction and error concealment are carried out.Otherwise, circumferential scanning is continued.
During whole scanning, when checking that dolly 3 reaches the terminal of setting, step number N-1 determines whether 0, if
For 0, scanning terminates.Otherwise, reverse scanning is carried out.When the starting point of the arrival setting of dolly 3 is looked into, step number N-1 determines whether 0,
If 0, scanning terminates.Otherwise, positive scanning is carried out.Then, dolly 3 is checked according to this flow process scanning, until step number N becomes
0。
More specifically, when checking, equitable subsection can be passed through, it is ensured that each scanning section at least includes a keyway, uses
In the aligning of current scanning section.
According to the flow implementation shown in Fig. 2 flow charts.First circumferential initial alignment is carried out to checking dolly 3, then it is slow circumferential
It is mobile to check dolly 3 near keyway 2, and circumferential coordinate during 4 value changes of sensing element is recorded, then will check that dolly 3 is moved
To scanning initial point position, scanning path and step number N are set, and start scanning.
When checking that dolly 3 moves to keyway 2, the relation of circumferential position now and actual value is contrasted, if deviation
More than the threshold value of setting, circumferential position correction and error concealment are carried out.Otherwise, circumferential scanning is continued.
During circumferential scanning, check that dolly, from setting starting point, when checking that dolly 3 reaches the terminal of setting, makes scanning
Step number N=N-1, then judges whether scanning step number N is 0, and if 0, scanning terminates.Otherwise, reverse scanning is carried out, i.e., from setting
Terminal scanning is determined to setting starting point.When the starting point of the arrival setting of dolly 3 is looked into, scanning step number N=N-1 is made, then judge that scanning is walked
Whether number N is 0, and if 0, scanning terminates.Otherwise, positive scanning is carried out.Then, dolly 3 is checked according to this flow process scanning, directly
Become 0 to scanning step number N.
Embodiments of the invention are explained in detail above, above-mentioned embodiment is only most highly preferred embodiment of the invention,
But the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, can with
Various changes can be made on the premise of without departing from present inventive concept.
Claims (2)
1. a kind of nuclear reactor pressure container screwed hole is with nondestructive inspection (NDI) circumferential position antidote, it is characterised in that
Step 1, multiple keyways of support level on nuclear reactor pressure container are set as into position reference；
Step 2, be set as inside the keyway of position reference install sensing element (4)；
Step 3, the lossless scanning dolly of nuclear reactor pressure container screwed hole band pass through the sensing element (4) when, sensing unit
Part (4) provides the true circumferential position of scanning dolly；
During step 4, the true circumferential position of dolly of scanning dolly self induction in future element (4) offer and dolly displacement
The measurement circumferential position of measurement is compared, and carries out circumferential position correction.
2. nuclear reactor pressure container screwed hole as claimed in claim 1 is with nondestructive inspection (NDI) circumferential position antidote, its feature
It is in the step 4, if true circumferential position is more than specified threshold with the deviation of measurement circumferential position, to use
True circumferential position is corrected to the little truck position of scanning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310751154.XA CN104751914B (en) | 2013-12-31 | 2013-12-31 | Non-destructive inspection circumferential position correction method for thread hole belt of nuclear reactor pressure vessel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310751154.XA CN104751914B (en) | 2013-12-31 | 2013-12-31 | Non-destructive inspection circumferential position correction method for thread hole belt of nuclear reactor pressure vessel |
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| CN104751914A CN104751914A (en) | 2015-07-01 |
| CN104751914B true CN104751914B (en) | 2017-05-17 |
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| CN201310751154.XA Active CN104751914B (en) | 2013-12-31 | 2013-12-31 | Non-destructive inspection circumferential position correction method for thread hole belt of nuclear reactor pressure vessel |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935290B (en) * | 2015-12-30 | 2018-09-28 | 核动力运行研究所 | A kind of reactor pressure vessel flange hole band craft checking tool |
| CN105817831B (en) * | 2016-05-13 | 2018-07-10 | 中广核研究院有限公司 | The screw hole defects detection and restorative procedure of nuclear power station large container and equipment, device |
| CN108269624B (en) * | 2016-12-30 | 2023-10-20 | 核动力运行研究所 | Circumferential motion simulation bench for pressure vessel flange crawling trolley |
| CN109975426B (en) * | 2017-12-28 | 2023-10-20 | 核动力运行研究所 | Circumferential positioning device and method of large-diameter cylinder inner wall ultrasonic detection equipment |
| CN111380954B (en) * | 2018-12-28 | 2024-09-10 | 核动力运行研究所 | Ultrasonic automatic inspection device for pressure vessel of high-temperature gas cooled reactor |
Citations (2)
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|---|---|---|---|---|
| US4600115A (en) * | 1984-11-01 | 1986-07-15 | Framatome & Cie | Temporary obturation panel of a passage inside a vessel accessible only through an orifice of smaller size |
| CN201237584Y (en) * | 2008-07-11 | 2009-05-13 | 四川大学 | Autotracking ultrasonic wave on-line fault detection system for slewing body profile |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2735185B2 (en) * | 1987-02-19 | 1998-04-02 | 株式会社東芝 | Reactor pressure vessel inspection equipment |
| JPH07110320A (en) * | 1994-03-28 | 1995-04-25 | Babcock Hitachi Kk | Pressure vessel tester |
-
2013
- 2013-12-31 CN CN201310751154.XA patent/CN104751914B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4600115A (en) * | 1984-11-01 | 1986-07-15 | Framatome & Cie | Temporary obturation panel of a passage inside a vessel accessible only through an orifice of smaller size |
| CN201237584Y (en) * | 2008-07-11 | 2009-05-13 | 四川大学 | Autotracking ultrasonic wave on-line fault detection system for slewing body profile |
Non-Patent Citations (1)
| Title |
|---|
| 核电厂反应堆压力容器主螺栓超声检测方法研究;张国丰 等;《核动力工程》;20130831;第34卷(第4期);第143-146页 * |
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