CN117976270A - Pull rod mechanism for pull rod of pressurized water reactor fuel assembly - Google Patents
Pull rod mechanism for pull rod of pressurized water reactor fuel assembly Download PDFInfo
- Publication number
- CN117976270A CN117976270A CN202211663987.6A CN202211663987A CN117976270A CN 117976270 A CN117976270 A CN 117976270A CN 202211663987 A CN202211663987 A CN 202211663987A CN 117976270 A CN117976270 A CN 117976270A
- Authority
- CN
- China
- Prior art keywords
- pull rod
- component
- nut
- pressurized water
- water reactor
- 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
- 239000003758 nuclear fuel Substances 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 210000000078 claw Anatomy 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
- G21C19/02—Details of handling arrangements
- G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
- G21C19/105—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements with grasping or spreading coupling elements
-
- 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
Landscapes
- 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 relates to a pull rod mechanism for a pull rod of a pressurized water reactor fuel assembly, which comprises a claw head (2), a first nut (4), a mandrel component (5), a pull rod component (7), a spring (11) and a second nut (12); the mandrel component (5) is arranged inside the pull rod component (7) and the left end of the mandrel component extends out of the pull rod component (7), and a spring (11) and a second nut (12) are arranged outside the left end of the mandrel component (5); the second nut (12) is positioned at the left side of the spring (11) and is in contact connection with the spring (11); the right end of the mandrel component (5) is in threaded connection with the claw head (2), and the claw head (2) is in contact connection with the pull rod component 7; the first nut (4) is in threaded connection with the mandrel component (5). The pull rod mechanism for the pull rod of the pressurized water reactor fuel assembly is used for positioning the claw head, and the claw head is not easy to loosen.
Description
Technical Field
The invention relates to the technical field of pressurized water reactor fuel assembly, in particular to a pull rod mechanism for a pull rod of a pressurized water reactor fuel assembly.
Background
Pressurized water reactor fuel assemblies are typically assembled by pulling the fuel rods into a skeletal grid. The existing rod pulling mechanism has the following problems: the claw head is easy to loosen and the displacement is changed; when the fuel rod is grasped, the position of the claw head is not easy to control, and the position of the fuel rod needs to be manually adjusted.
Disclosure of Invention
The invention aims to provide a pull rod mechanism for a pull rod of a pressurized water reactor fuel assembly, which is used for positioning a claw head and is not easy to loosen.
In order to achieve the above object, the present invention provides the following technical solutions:
a pull rod mechanism for a pull rod of a pressurized water reactor fuel assembly comprises a claw head, a first nut, a mandrel component, a pull rod component, a spring and a second nut; the mandrel part is arranged inside the pull rod part, the left end of the mandrel part extends out of the pull rod part, and the spring and the second nut are arranged outside the left end of the mandrel part; the second nut is positioned at the left side of the spring and is in contact connection with the spring; the right end of the mandrel component is in threaded connection with the claw head, and the claw head is in contact connection with the pull rod component; the first nut is threadably coupled to the spindle unit.
Further, the pull rod mechanism for the pressurized water reactor fuel assembly pull rod further comprises a second V-shaped block and a concave block, wherein the second V-shaped block and the concave block are welded on the same plane of the surface of the pull rod component, and the second V-shaped block is positioned on the left side of the concave block.
Further, the pull rod mechanism for the pull rod of the pressurized water reactor fuel assembly further comprises a short sleeve, and the short sleeve is in threaded sleeve connection with the outer surface of the pull rod part.
Further, the pull rod mechanism for the pressurized water reactor fuel assembly pull rod further comprises a first V-shaped block and a square block, wherein the first V-shaped block and the square block are welded on the surface of the mandrel part, and the first V-shaped block is positioned on the left side of the square block.
Further, the pull rod mechanism for the pressurized water reactor fuel assembly pull rod further comprises a guide cap, wherein the guide cap is sleeved on the claw head and plays a role in guiding the claw head.
The beneficial technical effects of the invention are as follows:
According to the pull rod mechanism for the pull rod of the pressurized water reactor fuel assembly, the structure of the pull rod mechanism is optimized, the pull rod is stressed in the rod conveying process, the mandrel is stressed in the rod pulling process, the force between the pull rod and the mandrel in the rod pulling process is reduced, and meanwhile, the friction force is increased to prevent the claw heads from being opened. The jaw head is fixed by a pull rod, and the mandrel moves, so that the jaw head position can be controlled conveniently; the nut is added at the threaded connection part of the claw head and the mandrel, so that the claw head is positioned and placed to rotate.
Drawings
FIG. 1 is a schematic view of a pull rod mechanism for a pressurized water reactor fuel assembly pull rod according to the present invention;
FIG. 2 is a cross-sectional view of a tie rod mechanism for a pressurized water reactor fuel assembly tie rod of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2A;
FIG. 4 is an enlarged view of a portion of FIG. 2B;
FIG. 5 is a schematic illustration of a selector lever operation;
FIG. 6 is a schematic illustration of the work of the feed rod;
FIG. 7 is a schematic view of the jaw Zhang Shougong;
Fig. 8 is a schematic diagram of the operation of the pull rod.
In the figure, 1-a guide cap; 2-claw heads; 3-short sleeve; 4-a first nut; 5-a mandrel; 6-square blocks; 7-a pull rod; 8-concave blocks; 9-a first V-block; 10-a second V-block; 11-a spring; 12-a second nut.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully understood from the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1-4, the invention provides a pull rod mechanism for a pull rod of a pressurized water reactor fuel assembly, which comprises a claw head 2, a first nut 4, a mandrel component 5, a pull rod component 7, a spring 11 and a second nut 12; the mandrel part 5 is arranged inside the pull rod part 7, the left end of the mandrel part extends out of the pull rod part 7, and the spring 11 and the second nut 12 are arranged outside the left end of the mandrel part 5; the second nut 12 is positioned on the left side of the spring 11 and is in contact connection with the spring 11; the right end of the mandrel component 5 is in threaded connection with the claw head 2, and the claw head 2 is in contact connection with the pull rod component 7; the first nut 4 is screwed with the spindle unit 5.
The first nut 4 plays a role in positioning the claw head 2 and preventing the claw head 2 from rotating, and the position of the claw head 2 on the mandrel component 5 is controlled by adjusting the position of the first nut 4 on the mandrel component 5, so that the claw head 2 is prevented from loosening in the use process; the second nut 12 serves to prevent the spring 11 from loosening, and the length of the spring 11 is adjusted by the second nut 12 to control the amount of force required for the relative movement of the spindle unit 5 with the jaw 2 and the pull rod unit 7.
Further, the pull rod mechanism for the pressurized water reactor fuel assembly pull rod further comprises a second V-shaped block 10 and a concave block 8, wherein the second V-shaped block 10 and the concave block 8 are welded on the same plane on the surface of the pull rod part 7, and the second V-shaped block 10 is positioned on the left side of the concave block 8.
Further, the pull rod mechanism for the pressurized water reactor fuel assembly pull rod further comprises a short sleeve 3, and the short sleeve 3 is in threaded sleeve connection with the outer surface of the pull rod part 7 close to the claw head 2.
Further, the pull rod mechanism for the pressurized water reactor fuel assembly pull rod further comprises a first V-shaped block 9 and a square block 6, wherein the first V-shaped block 9 and the square block 6 are welded on the surface of the mandrel component 5, and the first V-shaped block 9 is positioned on the left side of the square block 6.
Further, the pull rod mechanism for the pressurized water reactor fuel assembly pull rod further comprises a guide cap 1, wherein the guide cap 1 is sleeved on the claw head 2 and plays a role in guiding the claw head 2.
The pulling rod mechanism for the pulling rod of the pressurized water reactor fuel assembly is used for pulling the pulling rod of the pressurized water reactor fuel assembly and comprises a selecting rod, a delivering rod, a claw head and a pulling rod.
Referring to fig. 5, select lever: when the pull rod is selected, firstly, the pull rod is selected by downwards moving one part and being clamped on the second V-shaped block 10; when the pull rod mechanism is stressed by the short side of the concave block 8 and moves rightwards, the second V-shaped 10 is clamped, and the pull rod cannot move rightwards; when the pull rod is not selected, no part moves downwards to be clamped on the second V-shaped block 10; when the pull rod mechanism is stressed by the short side of the concave block 8 and moves rightwards, the pull rod moves rightwards.
Referring to fig. 6, the rod is fed: a part is clamped on the concave block 8, and in the rightward movement process of the part, the part contacts with the short side of the concave block 8 to achieve force transmission, so that the pull rod mechanism moves rightward.
Referring to fig. 7, the retracting pawl: controlling the movement of the spindle unit 5 and the jaw head 2 by controlling the first V-block 9; controlling the movement of the pull rod part 7 by controlling the concave block 8; in a natural state, the left end of the mandrel part 5 is connected with the pull rod part 7 through a spring 11 and a nut 12; the right end of the mandrel part 5 is connected with the pull rod part 7 through natural elastic deformation of the claw head 2; in a natural state, the spring is in a compressed state, and the claw head 2 is in a claw-collecting state; the force required by 2 claws of the claw head is controlled by adjusting the length of the spring; limiting the movement of the jaw 2 by means of a part inserted downwards into the first V-block 9; zhang Zhaoshi, the first V-shaped block 9 is fixed, the claw head 2 moves rightwards relative to the pull rod part 7 through the left force of the concave block 8, and the claw head is opened; when the claw is retracted, the first V-shaped block 9 is fixed, the leftward force of the concave block 8 is withdrawn, and the claw head 2 is tightened.
Referring to fig. 8, a pull rod: in the rod pulling process, the claw heads 2 grasp the lower end plug of the fuel rod; by applying a leftward force on the right side of the square block 6, the mandrel part 5 and the fuel rod are driven to move leftward by driving the square block 6 to move leftward, so that the aim of pulling the rod is fulfilled.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. The pull rod mechanism for the pull rod of the pressurized water reactor fuel assembly is characterized by comprising a claw head (2), a first nut (4), a mandrel component (5), a pull rod component (7), a spring (11) and a second nut (12); the mandrel component (5) is arranged inside the pull rod component (7) and the left end of the mandrel component extends out of the pull rod component (7), and a spring (11) and a second nut (12) are arranged outside the left end of the mandrel component (5); the second nut (12) is positioned at the left side of the spring (11) and is in contact connection with the spring (11); the right end of the mandrel component (5) is in threaded connection with the claw head (2), and the claw head (2) is in contact connection with the pull rod component 7; the first nut (4) is in threaded connection with the mandrel component (5).
2. The tie rod mechanism for a pressurized water reactor fuel assembly tie rod of claim 1, further comprising a second V-shaped block (10) and a concave block (8), wherein the second V-shaped block (10) and the concave block (8) are welded on the same plane as the surface of the tie rod member (7), and wherein the second V-shaped block (10) is positioned on the left side of the concave block (8).
3. The tie rod mechanism for a pressurized water reactor fuel assembly tie rod of claim 1, further comprising a short sleeve (3), wherein the short sleeve (3) is in threaded engagement with the outer surface of the tie rod member (7).
4. The tie rod mechanism for a pressurized water reactor fuel assembly tie rod of claim 1, further comprising a first V-shaped block (9) and a square block (6), wherein the first V-shaped block (9) and the square block (6) are welded to the surface of the mandrel member (5), and wherein the first V-shaped block (9) is positioned on the left side of the square block (6).
5. The pull rod mechanism for the pressurized water reactor fuel assembly pull rod according to claim 1, further comprising a guide cap (1), wherein the guide cap (1) is sleeved on the claw head (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211663987.6A CN117976270A (en) | 2022-12-23 | 2022-12-23 | Pull rod mechanism for pull rod of pressurized water reactor fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211663987.6A CN117976270A (en) | 2022-12-23 | 2022-12-23 | Pull rod mechanism for pull rod of pressurized water reactor fuel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117976270A true CN117976270A (en) | 2024-05-03 |
Family
ID=90851999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211663987.6A Pending CN117976270A (en) | 2022-12-23 | 2022-12-23 | Pull rod mechanism for pull rod of pressurized water reactor fuel assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117976270A (en) |
-
2022
- 2022-12-23 CN CN202211663987.6A patent/CN117976270A/en active Pending
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