A connection structure that is easy to realize rapid disassembly and assembly underwater after irradiation and its assembly method

A connecting structure and fast technology, applied in the direction of connecting components, screws, threaded fasteners, etc., can solve the problems of increasing the difficulty of underwater disassembly, transfer into the spent fuel pool, damage to screws, etc., and achieve a simple structure and simplified disassembly and assembly. Program, the effect of easy disassembly and assembly under water

Active Publication Date: 2020-09-29
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the connection method given in Document 1, tooling is required to fix and limit the screw when the nut is disassembled, which increases the difficulty of underwater disassembly and assembly, and at the same time there is a risk of damage to the screw; the deformation of the nut requires special tools to achieve; Screws and attached structures are at risk of diversion into spent fuel pools

Method used

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  • A connection structure that is easy to realize rapid disassembly and assembly underwater after irradiation and its assembly method
  • A connection structure that is easy to realize rapid disassembly and assembly underwater after irradiation and its assembly method
  • A connection structure that is easy to realize rapid disassembly and assembly underwater after irradiation and its assembly method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 , figure 2 , image 3 , Figure 4 Shown:

[0043] A connection structure that is easy to quickly disassemble and assemble underwater after irradiation,

[0044] It includes a structural main body 3 with an anti-rotation mounting hole 31, and an anti-rotation screw 1 inserted into the anti-rotation mounting hole 31. The circumferential side wall of the anti-rotation screw 1 protrudes to form an anti-rotation boss 11. The anti-rotation The anti-rotation boss portion 11 is located in the anti-rotation mounting hole 31 and matches the shape of the anti-rotation mounting hole 31. The circumferential side wall of the anti-rotation screw rod 1 is provided with a thread to form a threaded portion 12, and the threaded portion 12 is located on the anti-rotation boss portion. 11, above the threaded part 12, there is a section of top 13, which also includes a skirt nut 2. The skirt nut 2 includes a nut body 21 screwed on the threaded part 12, and the upper end...

Embodiment 2

[0050] On the basis of above-mentioned embodiment 1, the present invention also faces to the design problem of top 13 and the cooperating design of top 13 and skirt, and the design of its top 13 and skirt follows a design purpose, promptly prevents that skirt is relative to top 13 takes place circumferential rotation motion. Regarding this design purpose, the present invention provides two preferred solutions, one is to press and fit, such as Figure 5 shown, one is an embedded design such as Figure 6 shown.

[0051] Such as Figure 5 As shown, extrusion fit method: the top 13 includes an equal-diameter section adjacent to the threaded portion 12 and above the threaded portion 12, and also includes an upwardly reduced diameter-reducing section adjacent to the equal-diameter section and above the equal-diameter section , the special-shaped structure is matched and connected with the diameter-reducing section, and the special-shaped structure is deformed into a wedge-shaped ...

Embodiment 3

[0060] An assembly method for a connection structure that is easy to realize quick disassembly and assembly underwater after irradiation, including assembly operation and disassembly operation,

[0061] Assembly operation:

[0062] S1. Insert the anti-rotation screw 1 into the anti-rotation mounting hole 31 of the structural body 3 by using a mechanical clamp, so that the anti-rotation boss 11 is located in the anti-rotation mounting hole 31;

[0063] S2. Screw the nut body 21 of the skirt nut 2 onto the threaded part 12 by using a mechanical fixture;

[0064] S3. Extruding the skirt structure with a mechanical clamp, deforming the skirt structure and extruding the skirt structure on the outer surface of the special-shaped structure at least in a circumferential direction;

[0065] Disassembly operation:

[0066] A. The nut body 21 is reversely rotated by a mechanical fixture, and the nut body 21 drives the skirt structure to rotate, and the deformed part of the skirt struct...

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Abstract

The invention discloses a connection structure that is easy to quickly disassemble and assemble underwater after irradiation. The side wall protrudes to form an anti-rotation boss, and the anti-rotation boss is located in the anti-rotation mounting hole and matches the shape of the anti-rotation mounting hole. The circumferential side wall of the anti-rotation screw is provided with a thread to form a threaded portion. The threaded part is located above the anti-rotation boss part, and a section of top is arranged above the threaded part, and a skirt nut is also included. The skirt nut includes a nut body screwed on the threaded part, and the upper end surface of the nut body extends to form a skirt structure , the skirt structure is sheathed outside the top, wherein the top includes at least a section of a special-shaped structure formed by setting protrusions or depressions on the structural basis of the conical body or cylinder, and the nut body matches the threaded part When in place, an external force is used to exert pressure on the skirt structure body, so that the skirt structure body is squeezed on the outer surface of the special-shaped structure at least in a circumferential direction.

Description

technical field [0001] The invention belongs to the technical field of connection of internal equipment of nuclear power plants, and in particular relates to a connection structure and an assembly method thereof which are easy to realize quick disassembly and assembly under water after irradiation. Background technique [0002] The nuclear reactor core structure design mainly includes the design of fuel assemblies, fuel-related assemblies and related test pieces. Fuel assemblies and related components need to be repaired after they fail due to radiation damage, and the test samples of related test pieces need to be replaced. Due to the high radiation dose after irradiation, these maintenance or replacement operations can only be disassembled underwater in the spent fuel pool, which brings great challenges to its maintenance and replacement. Therefore, in the design of the nuclear reactor core structure, it is necessary to carry out the fine design of the connection structur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B39/10F16B35/04B25B27/00
CPCB25B27/00F16B35/041F16B35/044F16B39/108
Inventor 蒲曾坪王坤张林李庆曾孝敏黄春兰陈平茹俊
Owner NUCLEAR POWER INSTITUTE OF CHINA
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