CN108413853B - Nuclear power station reactor core lower support plate flatness measuring instrument - Google Patents
Nuclear power station reactor core lower support plate flatness measuring instrument Download PDFInfo
- Publication number
- CN108413853B CN108413853B CN201710073442.2A CN201710073442A CN108413853B CN 108413853 B CN108413853 B CN 108413853B CN 201710073442 A CN201710073442 A CN 201710073442A CN 108413853 B CN108413853 B CN 108413853B
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- CN
- China
- Prior art keywords
- base
- support plate
- nuclear power
- reactor core
- lower support
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Links
- 238000005259 measurement Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000446 fuel Substances 0.000 abstract description 16
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/28—Measuring arrangements characterised by the use of mechanical techniques for measuring roughness or irregularity of surfaces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
-
- 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 provides a flatness measuring instrument for a nuclear power station reactor core lower support plate, which comprises a base and an inclination sensor, wherein the inclination sensor is arranged on the base, at least two vertical positioning columns are arranged on the bottom surface of the base, a plurality of supporting feet with the same height are further arranged on the edge of the bottom surface of the base, and a hanging ring is arranged on the top surface of the base. The main structure and the size of the base and the lower tube seat of the fuel assembly are kept consistent, and the measurement data of the measuring instrument can directly reflect the inclination condition possibly occurring after the fuel assembly is located; the invention can be used for remote measurement and also can be used for short-distance manual measurement, and is flexible in use.
Description
Technical Field
The invention relates to the field of nuclear power, in particular to a flatness measuring instrument for a lower support plate of a nuclear power station reactor core.
Background
During operation of the nuclear power plant, the upper surface of the lower core support plate is provided with positioning pins which are matched with the lower tube seat of the fuel assembly to be positioned, and the fuel assembly is located at each station on the upper surface of the lower core support plate through the positioning pins. The bottom of the lower tube seat of the fuel assembly is completely contacted with the upper surface of the lower support plate of the reactor core after the fuel assembly is completely seated, and if the flatness of the lower support plate is changed, the fuel assembly can be inclined to the surrounding fuel group, so that the fuel assembly is laterally extruded, and the fuel assembly is damaged. During the operation of the nuclear power station, the lower support plate of the reactor core is in a high gamma-ray radiation environment for a long time, and the material of the lower support plate can be activated, creeped, slightly deformed and the like, so that the overall flatness of the upper surface of the lower support plate can be changed; during overhaul, collision and foreign matter falling can also have a certain influence on the overall flatness of the lower core support plate when the lower internals are hoisted.
At present, during the major repair of refueling, a nuclear power station refueling person can visually observe the surface leveling condition of the upper surface of the lower support plate of the reactor core through an underwater television, and no underwater quantitative measuring instrument for the flatness of the lower support plate of the reactor core has been found. Visual observation is a qualitative evaluation means, and can only observe whether foreign matters exist on the upper surface of the lower support plate of the reactor core or not and approximately estimate deformation which can be identified by human eyes, and can not effectively observe the micro deformation of flatness change; the fuel assembly is 4-5 m high, and the tiny deformation can have a great influence on the verticality of the fuel assembly after being in place. In addition, the visual observer standards of all the nuclear power stations are different, the validity of the observation judgment conclusion is seriously dependent on the judgment experience of the observer, and potential risks are brought to the fuel operation safety of the nuclear power stations.
Disclosure of Invention
The invention aims to solve the technical problem of providing a nuclear power station reactor core lower support plate flatness measuring instrument with high measuring precision and data conservation, so as to overcome the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a nuclear power station reactor core lower support plate flatness measuring apparatu, includes base and inclination sensor, inclination sensor installs on the base, be equipped with two at least vertical reference columns on the bottom surface of base, the bottom surface edge of base still is equipped with a plurality of stabilizer blades that highly are the same, the top surface of base is equipped with rings.
Preferably, the tilt sensor is mounted at an intermediate position of the base.
Further, two hanging rings are arranged and are symmetrically arranged relative to the inclination angle sensor.
Preferably, a handle is further arranged on the top surface of the base.
Preferably, the inclination sensor is provided with a connector connected with the cable.
Preferably, the legs are uniformly arranged along the circumference of the bottom surface of the base.
Preferably, the base is provided with a plurality of observation holes.
Preferably, a positioning pin is arranged on the reactor core lower support plate, and a positioning hole matched with the positioning pin is arranged on the base.
Further, the positioning holes are formed in the support legs.
As described above, the nuclear power station reactor core lower support plate flatness measuring instrument has the following beneficial effects:
1) The main structure and the size of the base and the lower tube seat of the fuel assembly are consistent, and the measurement data of the measuring instrument can directly reflect the inclination condition possibly occurring after the fuel assembly is located.
2) The base is provided with the hanging ring and the hanging ring, so that the remote measurement can be performed, and the short-distance manual measurement can be performed.
3) The positioning column on the base is matched with the water holes of the lower support plate of the reactor core, so that the measuring instrument is ensured to be accurately attached to the station to be measured; in addition, the observation hole on the base is beneficial to accurately judging the centering condition of the positioning hole and the positioning pin of the station to be detected by remote operation.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a top perspective view of the present invention.
Fig. 3 is a bottom perspective view of the present invention.
FIG. 4 is a schematic view of the invention mated with a lower support plate.
In the figure:
1. base 2 inclination sensor
3. Positioning column 4 hanging ring
5. Handle 6 lower support plate
11. Observation hole of support leg 12
13. Positioning hole 21 joint
Detailed Description
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the disclosure of the present invention, and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the terms of modification, variation of proportions, or adjustment of sizes, without affecting the efficacy or achievement of the present invention, should be understood as falling within the scope of the present invention. Also, the terms such as "upper", "lower", "front", "rear", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the invention for which the invention may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.
As shown in fig. 1-3, the invention discloses a flatness measuring instrument for a nuclear power station reactor core lower support plate, which comprises a base 1 and an inclination sensor 2, wherein the inclination sensor 2 is installed on the base 1, at least two vertical positioning columns 3 are arranged on the bottom surface of the base 1, a plurality of supporting legs 11 with the same height are further arranged on the edge of the bottom surface of the base 1, and a hanging ring 4 is arranged on the top surface of the base 1. The height of the positioning column 3 is larger than that of the supporting legs 11, so that the positioning column 3 is effectively inserted into a water flowing hole on a lower supporting plate of a reactor core to be matched and positioned. The bottom surface of the supporting leg 11 is used as a measuring reference surface to be directly contacted with the surface to be measured of the reactor core lower support plate after the whole positioning, the shape of the supporting leg 11 can be customized according to the structural change of the surface to be measured, in this embodiment, the supporting legs 11 are uniformly arranged along the circumferential direction of the bottom surface of the base, and in particular, four supporting legs 11 shown in fig. 3 can be adopted. According to the invention, the positioning column 3 is detachably connected with the base 1 through a thread structure, and the positioning column 3 can be arranged at different positions on the bottom surface of the reactor core lower support plate and is used for aligning the position to be measured in advance. The inclination sensor 2 is used for acquiring inclination angle data of a surface to be measured. The lifting ring 4 is used for remotely lifting and moving the invention.
In this embodiment, a handle 5 is further disposed on the top surface of the base 1. The handles 5 are provided with two handles and are symmetrically arranged, and the handles are used for manually moving the measuring instrument in a short distance to carry out measurement.
In this embodiment, referring to fig. 2, the tilt sensor 2 is installed at an intermediate position of the base 1. Further, two hanging rings 4 are arranged, and the two hanging rings 4 are symmetrically arranged relative to the inclination angle sensor 2.
The inclination sensor 2 is provided with a connector 21 connected with a cable, and the data is remotely transmitted to an upper computer for analysis through the connection with the cable.
In order to facilitate the matching alignment of the positioning column 3 and the water flowing hole of the reactor core lower support plate, a plurality of observation holes 12 are formed in the base 1.
In this embodiment, the lower support plate of the reactor core is provided with a positioning pin matched with the fuel assembly, as shown in fig. 3, the base 1 of the present invention is provided with a positioning hole 13 matched with the positioning pin, and the positioning hole 13 assists the positioning of the positioning column 3. Further, two positioning holes 13 are provided and are respectively formed on one supporting leg 11, and in addition, the hanging ring 4 is located right above the positioning holes 13, so that the positioning holes can be effectively observed to be matched with positioning pins on the lower supporting plate for positioning.
Fig. 4 is a view showing the structure of the present invention, in which the positioning column 3 is inserted into the water flow hole of the lower support plate 6. With reference to fig. 1-3, the invention is based on the following methods and principles:
firstly, assembling and debugging the measuring instrument, then hoisting the measuring instrument on a station to be measured of a lower supporting plate of a reactor core through a manual operation handle 5 or a remote operation tool, and matching and positioning a positioning column 3 and a water flow hole in the lower supporting plate, wherein a positioning hole 13 is matched with a positioning pin. And collecting the station data after the upper computer data are stable. After the station data acquisition is completed, the measuring instrument is lifted and moved to the next station to be measured, and the measuring process is repeated. When the measuring instrument works, if the fluctuation of the measured data of the same station is found to be large, the measuring instrument can be calibrated at any time according to the needs, so that the accuracy of the measuring result is ensured.
The invention is not only limited to the flatness measurement of the reactor core lower support plate, but also applicable to the measurement of the flat plate type components of the nuclear power station. In addition, the invention is not only limited to flatness measurement, but also can measure the inclination degree of the component according to the requirement, and obtain the inclination angle change data of the component under the working conditions of installation and in-service operation.
The base 1 in fig. 1 and 2 is a preferred structure, and may be specifically designed into other shapes, such as a circle, a polygon, etc., according to an actual object to be measured.
In conclusion, the flatness measuring instrument for the nuclear power station reactor core lower support plate is simple and convenient to use and high in measuring accuracy. Therefore, the invention effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. The present invention is capable of modifications in the foregoing embodiments, as obvious to those skilled in the art, without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (8)
1. The utility model provides a nuclear power station reactor core lower support plate flatness measurement appearance which characterized in that: comprises a base (1) and an inclination sensor (2), wherein the inclination sensor (2) is arranged on the base (1),
at least two vertical positioning columns (3) are arranged on the bottom surface of the base (1), and the positioning columns (3) are used for being inserted into the water holes on the reactor core lower support plate to be matched and positioned with the water holes; the edge of the bottom surface of the base (1) is also provided with a plurality of supporting legs (11) with the same height, and the bottom surface of each supporting leg (11) is used as a measuring reference surface to be directly contacted with a surface to be measured of the reactor core lower support plate; the height of the positioning column (3) is larger than that of the supporting legs (11);
a positioning hole (13) matched and positioned with a positioning pin on the lower support plate of the reactor core is formed in the base (1);
the top surface of base (1) is equipped with rings (4).
2. The nuclear power plant lower core support plate flatness measurement instrument of claim 1, wherein: the inclination angle sensor (2) is arranged at the middle position of the base (1).
3. The nuclear power plant lower core support plate flatness measurement instrument of claim 2, wherein: two hanging rings (4) are arranged, and the two hanging rings (4) are symmetrically arranged relative to the inclination angle sensor (2).
4. The nuclear power plant lower core support plate flatness measurement instrument of claim 1, wherein: the top surface of the base (1) is also provided with a handle (5).
5. The nuclear power plant lower core support plate flatness measurement instrument of claim 1, wherein: the inclination angle sensor (2) is provided with a connector (21) connected with a cable.
6. The nuclear power plant lower core support plate flatness measurement instrument of claim 1, wherein: the support legs (11) are uniformly arranged along the circumferential direction of the bottom surface of the base (1).
7. The nuclear power plant lower core support plate flatness measurement instrument of claim 1, wherein: the base (1) is provided with a plurality of observation holes (12).
8. The nuclear power plant lower core support plate flatness measurement instrument of claim 1, wherein: the positioning holes (13) are formed in the support legs (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710073442.2A CN108413853B (en) | 2017-02-10 | 2017-02-10 | Nuclear power station reactor core lower support plate flatness measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710073442.2A CN108413853B (en) | 2017-02-10 | 2017-02-10 | Nuclear power station reactor core lower support plate flatness measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108413853A CN108413853A (en) | 2018-08-17 |
| CN108413853B true CN108413853B (en) | 2024-02-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710073442.2A Active CN108413853B (en) | 2017-02-10 | 2017-02-10 | Nuclear power station reactor core lower support plate flatness measuring instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN108413853B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003315001A (en) * | 2002-04-26 | 2003-11-06 | Sunway:Kk | Method and apparatus for measuring flatness of road surface |
| CN103591924A (en) * | 2012-08-13 | 2014-02-19 | 中国石油天然气集团公司 | A measuring instrument for detecting the angle of a cold bending pipe |
| CN104457678A (en) * | 2014-12-17 | 2015-03-25 | 常熟市苏常工程质量检测有限公司 | Building engineering quality planeness detection device |
| CN204286429U (en) * | 2014-12-25 | 2015-04-22 | 施慧聪 | A kind of tester detecting terrace flatness |
| CN205066740U (en) * | 2015-10-21 | 2016-03-02 | 中国建筑第七工程局有限公司 | Intelligent construction detection ruler |
| CN205655787U (en) * | 2016-04-13 | 2016-10-19 | 天水星火机床有限责任公司 | Utensil is examined to plane degree |
| CN206479137U (en) * | 2017-02-10 | 2017-09-08 | 国核电站运行服务技术有限公司 | Nuclear power station reactor core lower supporting plate flatness measuring instrument |
-
2017
- 2017-02-10 CN CN201710073442.2A patent/CN108413853B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003315001A (en) * | 2002-04-26 | 2003-11-06 | Sunway:Kk | Method and apparatus for measuring flatness of road surface |
| CN103591924A (en) * | 2012-08-13 | 2014-02-19 | 中国石油天然气集团公司 | A measuring instrument for detecting the angle of a cold bending pipe |
| CN104457678A (en) * | 2014-12-17 | 2015-03-25 | 常熟市苏常工程质量检测有限公司 | Building engineering quality planeness detection device |
| CN204286429U (en) * | 2014-12-25 | 2015-04-22 | 施慧聪 | A kind of tester detecting terrace flatness |
| CN205066740U (en) * | 2015-10-21 | 2016-03-02 | 中国建筑第七工程局有限公司 | Intelligent construction detection ruler |
| CN205655787U (en) * | 2016-04-13 | 2016-10-19 | 天水星火机床有限责任公司 | Utensil is examined to plane degree |
| CN206479137U (en) * | 2017-02-10 | 2017-09-08 | 国核电站运行服务技术有限公司 | Nuclear power station reactor core lower supporting plate flatness measuring instrument |
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| Publication number | Publication date |
|---|---|
| CN108413853A (en) | 2018-08-17 |
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