CN211742662U - Height measuring device for fuel assembly repairing guide mechanism - Google Patents
Height measuring device for fuel assembly repairing guide mechanism Download PDFInfo
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- CN211742662U CN211742662U CN201922433984.3U CN201922433984U CN211742662U CN 211742662 U CN211742662 U CN 211742662U CN 201922433984 U CN201922433984 U CN 201922433984U CN 211742662 U CN211742662 U CN 211742662U
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- fuel assembly
- sleeve
- guide mechanism
- measuring device
- height measuring
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- 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 relates to the technical field of nuclear power fuel assembly maintenance, and particularly discloses a height measuring device for a fuel assembly repairing guide mechanism. A height measuring device for a fuel assembly repairing guide mechanism comprises a graduated scale, a sleeve and a core rod, wherein the core rod is arranged inside a long cylindrical sleeve, the graduated scale is arranged at the top end of the core rod, and when the end part of the core rod at the lower end of the sleeve is retracted into the sleeve, scales on the graduated scale can be exposed from the upper end of the sleeve. The height measuring device for the fuel assembly repairing guide mechanism can determine the installation levelness of the fuel assembly fixing device below 3 m of the water surface, and is simple in overall structure, good in rigidity, quick, convenient and reliable to install; and the measuring method is simple, the underwater installation levelness can be judged on the water surface, and the dosage of operators is reduced to the greatest extent.
Description
Technical Field
The invention belongs to the technical field of nuclear power fuel assembly maintenance, and particularly relates to a height measuring device for a fuel assembly repairing guide mechanism.
Background
The nuclear fuel is influenced by various factors such as water flow impact, vibration and the like in the running and using process, and has a certain damage rate. If the fuel rod is damaged, fission products can leak out, the radioactivity level of a primary circuit is increased, and even the safe operation of the nuclear power station is influenced. Therefore, the damaged fuel assembly which does not reach the burnup depth is repaired, the damaged fuel rod is replaced, and the fuel rod is continuously sent into the reactor core for use, so that the nuclear fuel can be reasonably utilized, and the safe and reliable operation of the reactor is ensured.
When the fuel assembly is repaired, the fuel assembly fixing device is installed on the spent water pool lifter, the damaged fuel assembly is placed in the lifter and is fixed by the fuel assembly fixing device, the locking bolt dismounting and guiding device is installed on the fuel assembly fixing device and is used for guiding and positioning the locking bolt of the upper tube seat of the damaged fuel assembly, the locking bolt is convenient to dismount subsequently, if the locking bolt dismounting and guiding device is installed out of level, the guiding operation is difficult to perform, and the assembly repairing failure can be caused when the plot is serious.
Disclosure of Invention
The invention aims to provide a height measuring device for a fuel assembly repairing guide mechanism, which solves the problem that whether a locking bolt disassembling and assembling guide mechanism is installed horizontally or not when a fuel assembly is repaired.
The technical scheme of the invention is as follows: a height measuring device for a fuel assembly repairing guide mechanism comprises a graduated scale, a sleeve and a core rod, wherein the core rod is arranged inside a long cylindrical sleeve, the graduated scale is arranged at the top end of the core rod, and when the end part of the core rod at the lower end of the sleeve is retracted into the sleeve, scales on the graduated scale can be exposed from the upper end of the sleeve.
The sleeve comprises a plurality of cylindrical pipes with different lengths, and every two cylindrical pipes are connected through male and female connectors to form a long rod cylindrical structure.
The sleeve comprises four sections of cylindrical barrels, and the four sections of cylindrical barrels are connected through three male and female connectors to form a long rod cylindrical structure with the length exceeding 3 meters.
The sleeve is made of carbon fiber materials and is connected with the male connector and the female connector in a threaded mode, and the male connector and the female connector are made of aluminum alloy materials.
The core bar is formed by connecting a plurality of long rods made of aluminum alloy materials.
The core rods are connected through a plurality of long rod mortise and tenon structures and assembled through male and female heads to form a long rod structure.
The upper end of the sleeve is provided with a hanging ring.
The graduated scale is made of stainless steel.
The inner diameter of the cylindrical barrel at the lower end of the sleeve is matched with the size of a positioning pin on the fuel assembly fixing device.
The invention has the following remarkable effects: the height measuring device for the fuel assembly repairing guide mechanism can determine the installation levelness of the fuel assembly fixing device below 3 m of the water surface, and is simple in overall structure, good in rigidity, quick, convenient and reliable to install; and the measuring method is simple, the underwater installation levelness can be judged on the water surface, and the dosage of operators is reduced to the greatest extent.
Drawings
FIG. 1 is a schematic view of a height measuring device for a fuel assembly repair guide mechanism according to the present invention;
FIG. 2 is a schematic view of a height measuring device for a fuel assembly repair guide mechanism according to the present invention
In the figure: 1. a hoisting ring; 2. a graduated scale; 3. a sleeve; 4. a male connector and a female connector; 5. a core bar; 6. a height measuring device; 7. a fuel assembly fixture; 8. locking bolt dismouting guider.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1, a height measuring device for a fuel assembly repair guide mechanism comprises a graduated scale 2, a sleeve 3 and a core rod 5, wherein the sleeve 3 comprises a plurality of cylindrical pipes with different lengths, every two cylindrical pipes are connected through a male connector and a female connector 4 to form a complete cylindrical sleeve 3 with a certain length, the core rod 5 is sleeved inside the sleeve 3, the graduated scale 2 is installed at the upper end of the core rod 5, the core rod 5 can move up and down inside the sleeve 3, and when the lower end of the core rod 5 is retracted into the sleeve 3, the graduated scale 2 at the upper end of the core rod 5 can display and read the scale value on the graduated scale 2 from the upper end of the sleeve 3; the upper end of the sleeve 3 is also provided with a hanging ring 1, and the whole height measuring device 6 can be moved by utilizing the hanging ring 1; the sleeve 3 comprises four sections of cylindrical cylinders which are made of carbon fiber materials, and every two cylindrical cylinders are in threaded connection through male and female connectors 4 made of aluminum alloy materials; the core rod 5 is formed by connecting a plurality of aluminum alloy materials through a mortise-tenon structure and is assembled through male and female heads to form a long rod structure, and the graduated scale 2 installed at the top end of the long rod structure is made of stainless steel.
The height measuring device for the fuel assembly repairing guide mechanism provided by the invention has the specific working process that: as shown in fig. 2, when the height measuring device 6 moves to the fuel assembly fixing device 7 through the hanging ring 1, the core bar 5 in the height measuring device 6 aligns with the positioning pin of the underwater fuel assembly fixing device 7, the sleeve 3 moves downwards until the sleeve 3 contacts the positioning plate of the locking bolt dismounting guide device 8, the positioning pin pushes the core bar upwards, the graduated scale 2 is exposed out of the sleeve 3 for a certain distance, and the reading of the graduated scale 2 above the water surface can be read; the scales of the positioning pin at the other side against the core rod 5 are measured by the same method, if the readings of the two graduated scales 2 are the same, the installation of the locking bolt dismounting guide device 8 can be judged to be in a horizontal state, and if the scales at the two positions are not consistent, the installation of the locking bolt dismounting guide device 8 is not smooth, and the positioning installation needs to be carried out again.
Claims (9)
1. A height measurement device for a fuel assembly repair guide mechanism, characterized in that: the device comprises a graduated scale (2), a sleeve (3) and a core rod (5), wherein the core rod (5) is arranged inside the long cylindrical sleeve (3), the graduated scale (2) is arranged at the top end of the core rod (5), and when the end part of the core rod (5) at the lower end of the sleeve (3) is retracted into the sleeve (3), scales on the graduated scale (2) can be exposed out from the upper end of the sleeve (3).
2. A height measuring device for a fuel assembly repair guide mechanism according to claim 1, wherein: the sleeve (3) comprises a plurality of cylindrical pipes with different lengths, and every two cylindrical pipes are connected through a male connector and a female connector (4) to form a long rod cylindrical structure.
3. A height measuring device for a fuel assembly repair guide mechanism according to claim 2, wherein: the sleeve (3) comprises four sections of cylindrical barrels, and the four sections of cylindrical barrels are connected through three male and female connectors (4) to form a long rod cylindrical structure with the length exceeding 3 meters.
4. A height measuring device for a fuel assembly repair guide mechanism according to any one of claims 1 to 3, wherein: the sleeve (3) is made of carbon fiber materials and is in threaded connection with the male connector and the female connector (4) made of aluminum alloy materials.
5. A height measuring device for a fuel assembly repair guide mechanism according to claim 1, wherein: the core bar (5) is formed by connecting a plurality of long rods made of aluminum alloy materials.
6. The height measuring device for a fuel assembly repair guide mechanism according to claim 1 or 5, wherein: the core rod (5) is connected through a plurality of long rod mortise and tenon structures and assembled through male and female heads to form a long rod structure.
7. A height measuring device for a fuel assembly repair guide mechanism according to claim 1, wherein: the upper end of the sleeve (3) is provided with a hanging ring (1).
8. A height measuring device for a fuel assembly repair guide mechanism according to claim 1, wherein: the graduated scale (2) is made of stainless steel.
9. A height measuring device for a fuel assembly repair guide mechanism according to any one of claims 1 to 3, wherein: the inner diameter of a cylindrical barrel at the lower end of the sleeve (3) is matched with the size of a positioning pin on the fuel assembly fixing device (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922433984.3U CN211742662U (en) | 2019-12-30 | 2019-12-30 | Height measuring device for fuel assembly repairing guide mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922433984.3U CN211742662U (en) | 2019-12-30 | 2019-12-30 | Height measuring device for fuel assembly repairing guide mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211742662U true CN211742662U (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922433984.3U Active CN211742662U (en) | 2019-12-30 | 2019-12-30 | Height measuring device for fuel assembly repairing guide mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211742662U (en) |
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2019
- 2019-12-30 CN CN201922433984.3U patent/CN211742662U/en active Active
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