CN116417162A - Single rod pulling tool for fuel assembly - Google Patents
Single rod pulling tool for fuel assembly Download PDFInfo
- Publication number
- CN116417162A CN116417162A CN202111655351.2A CN202111655351A CN116417162A CN 116417162 A CN116417162 A CN 116417162A CN 202111655351 A CN202111655351 A CN 202111655351A CN 116417162 A CN116417162 A CN 116417162A
- Authority
- CN
- China
- Prior art keywords
- tube
- fuel assembly
- telescopic
- outer tube
- fuel rod
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 52
- 238000000605 extraction Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 abstract description 5
- 238000000429 assembly Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 230000003578 releasing effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/19—Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel elements
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/20—Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
- G21C19/207—Assembling, maintenance or repair of reactor components
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/26—Arrangements for removing jammed or damaged fuel elements or control elements; Arrangements for moving broken parts thereof
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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
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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 field of special maintenance of fuel assemblies, and particularly relates to a single-rod pulling tool of a fuel assembly, which comprises a cylinder, a bolt, an outer tube, an inner tube, a telescopic tube, a positioning head and a gripper; the cylinder is connected with the outer tube, the outer tube is connected with the telescopic tube, the inner tube is sleeved in the telescopic tube, the end part of the telescopic tube is connected with the positioning head, and the end part of the inner tube is connected with the gripper. The invention has the beneficial effects that: the invention can remotely realize the pulling-out and inserting actions of the fuel rod; in the process of pulling out or inserting the fuel rod, the fuel rod is always in a protection state; the invention can provide larger clamping force when clamping the fuel rod, and can ensure that the fuel rod is not loosened in the pulling process.
Description
Technical Field
The invention belongs to the field of special maintenance of fuel assemblies, and particularly relates to a single-rod pulling tool of a fuel assembly, which is mainly used for implementing maintenance work on the fuel assembly of an AP1000 unit and carrying out pulling-out or inserting operation on a fuel rod.
Background
The single rod replacement technology of the fuel assembly of the nuclear power station is an advanced technology for effectively repairing the assembly which does not reach the burnup depth. The technology has been successfully implemented on AFA3G fuel assemblies at present, and single rod replacement equipment suitable for the type of assemblies needs to be developed according to the requirements of repairing the AP1000 fuel assemblies. The most important link in the replacement of a single fuel rod is to withdraw a broken single fuel rod and insert the replacement rod, so that a special tool is required to perform remote operation.
Disclosure of Invention
The invention aims to provide a single rod pulling tool of a fuel assembly, which is used for pulling out or inserting a single rod of the fuel assembly under water, so that the aims of carrying out single rod replacement, single rod inspection and other operations are fulfilled.
The technical scheme of the invention is as follows: a single rod pulling tool of a fuel assembly comprises a cylinder, a bolt, an outer tube, an inner tube, a telescopic tube, a positioning head and a gripper; the cylinder is connected with the outer tube, the outer tube is connected with the telescopic tube, the inner tube is sleeved in the telescopic tube, the end part of the telescopic tube is connected with the positioning head, and the end part of the inner tube is connected with the gripper.
The outer tube is a hollow tube.
The pipe wall of the outer pipe is provided with a plurality of pin holes.
The outer tube is connected with the telescopic tube through a bolt.
The telescopic tube is sleeved in the outer tube.
The telescopic pipe is a hollow pipe.
The cylinder is fixed on the fixed plate, and the fixed plate is connected with the hanging ring through the hanging lug.
The invention has the beneficial effects that: the invention can remotely realize the pulling-out and inserting actions of the fuel rod; in the process of pulling out or inserting the fuel rod, the fuel rod is always in a protection state; the invention can provide larger clamping force when clamping the fuel rod, and can ensure that the fuel rod is not loosened in the pulling process.
Drawings
FIG. 1 is a schematic illustration of a single rod extraction tool for a fuel assembly according to the present invention;
fig. 2 is a partial detail view of fig. 1.
In the figure: the lifting device comprises a lifting ring 1, a cylinder 2, a bolt 3, an outer tube 4, an inner tube 5, an extension tube 6, a positioning head 7 and a gripper 8.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
As shown in fig. 1 and 2, a single rod pulling tool of a fuel assembly comprises a hanging ring 1, a cylinder 2, a bolt 3, an outer tube 4, an inner tube 5, a telescopic tube 6, a positioning head 7 and a gripper 8; the lifting ring 1, the air cylinder 2, the bolt 3, the outer tube 4, the telescopic tube 6 and the gripper 8 are connected into a whole, and the inner tube 5 and the positioning head 7 are connected and can move up and down in the outer tube 4; the cylinder 2 controls the action of the inner tube 5 and thus the gripping and releasing action of the grippers 8.
The cylinder 2 is connected with the outer tube 4, the outer tube 4 is a hollow tube, a plurality of pin holes are formed in the tube wall of the outer tube 4 and connected with the telescopic tube 6 through the bolt 3, the telescopic tube 6 is sleeved in the outer tube 4, the telescopic tube 6 is also a hollow tube, the inner tube 5 is sleeved in the telescopic tube 6, the end part of the telescopic tube 6 is connected with the positioning head 7, and the end part of the inner tube 5 is connected with the gripper 8. The lower part of the lifting ring 1 is connected with a fixed plate through a lifting lug, and the air cylinder 2 is fixed on the fixed plate.
The tool can provide larger clamping force when taking the fuel rod by controlling the opening and closing of the grippers 8 through the cylinder 2, and can ensure that the fuel rod is not loosened in the pulling process.
Meanwhile, the transportation work of the fuel rod can be performed on the basis of the pulling-out function of the fuel rod.
When the fuel rod is pulled out, the outer tube 4 gradually envelopes the fuel rod into the fuel rod along with the lifting of the fuel rod, so that the fuel rod is always in a shielding protection state.
The outer tube 4 and the telescopic tube 6 are controlled to be relatively fixed through the bolt 3, the bolt 3 is inserted to be relatively fixed, and the telescopic tube 6 can be freely moved when the bolt 3 is pulled out.
The outer tube 4 of the invention is provided with a plurality of bolt hole sites, which is convenient for adjusting the relative position between the outer tube 4 and the telescopic tube 6, so that tools are respectively positioned at a working position, a maintenance position, a transferring position and the like.
The working state of the invention is vertical. The whole transportation is realized through the hanging ring 1. The gripper 8 is positioned inside the telescopic tube 6 during transferring, the positioning head 7 is not exposed, and the outer tube 4 and the telescopic tube 6 are relatively fixed by the bolt 3.
The invention will now be described in detail with reference to the drawings and specific examples.
As shown in figure 1, the invention mainly comprises a lifting ring 1, a cylinder 2, a bolt 3, an outer tube 4, an inner tube 5, a telescopic tube 6, a positioning head 7 and a gripper 8, wherein the lifting ring 1, the cylinder 2, the bolt 3, the outer tube 4, the telescopic tube 6 and the gripper 8 are connected into a whole, and the inner tube 5 and the positioning head 7 are connected and can move up and down in the outer tube 4; the cylinder 2 controls the action of the inner tube 5 and thus the gripping and releasing action of the grippers 8.
The fuel rod extraction process is as follows:
setting the tool in a transfer state, i.e. with the gripper 8 inside the telescopic tube 6;
the tool is integrally transferred to the position above the fuel rod to be plugged through the hanging ring 1;
the positioning head 7 is firstly contacted with a positioning plate of an object to be implemented;
the bolt 3 is pulled out, the telescopic pipe 6 is in an active state, the lifting ring 1 is lowered, and the grippers 8 are gradually exposed;
after the grippers 8 contact the fuel rod, controlling the extension of the inner tube 5 through the cylinder 2, so that the grippers 8 clamp the fuel rod;
lifting the lifting ring 1, gradually enabling the fuel rod to enter the telescopic pipe 6, and continuously descending the telescopic pipe 6 to gradually cover the fuel rod;
after the fuel rod completely enters the telescopic pipe 6, the tool can be lifted, and the transportation work of the fuel rod can be carried out.
Claims (7)
1. A single rod extraction tool for a fuel assembly, comprising: the device comprises an air cylinder, a bolt, an outer pipe, an inner pipe, an extension pipe, a positioning head and a gripper; the cylinder is connected with the outer tube, the outer tube is connected with the telescopic tube, the inner tube is sleeved in the telescopic tube, the end part of the telescopic tube is connected with the positioning head, and the end part of the inner tube is connected with the gripper.
2. A single rod extraction tool for a fuel assembly as defined in claim 1 wherein: the outer tube is a hollow tube.
3. A single rod extraction tool for a fuel assembly as defined in claim 2 wherein: the pipe wall of the outer pipe is provided with a plurality of pin holes.
4. A single rod extraction tool for a fuel assembly as defined in claim 3 wherein: the outer tube is connected with the telescopic tube through a bolt.
5. A single rod extraction tool for a fuel assembly as defined in claim 4 wherein: the telescopic tube is sleeved in the outer tube.
6. A single rod extraction tool for a fuel assembly as defined in claim 1 wherein: the telescopic pipe is a hollow pipe.
7. A single rod extraction tool for a fuel assembly as defined in claim 1 wherein: the cylinder is fixed on the fixed plate, and the fixed plate is connected with the hanging ring through the hanging lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111655351.2A CN116417162A (en) | 2021-12-31 | 2021-12-31 | Single rod pulling tool for fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111655351.2A CN116417162A (en) | 2021-12-31 | 2021-12-31 | Single rod pulling tool for fuel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116417162A true CN116417162A (en) | 2023-07-11 |
Family
ID=87056653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111655351.2A Pending CN116417162A (en) | 2021-12-31 | 2021-12-31 | Single rod pulling tool for fuel assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116417162A (en) |
-
2021
- 2021-12-31 CN CN202111655351.2A patent/CN116417162A/en active Pending
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |