Online sealing performance measurement sealing plug for small-caliber nuclear-grade check valve

A check valve and small-diameter technology, applied in the mechanical field, can solve the problems of unguaranteed sealing measurement results, inability to install, difficult installation, etc., and achieve the effects of shortening installation time, ensuring sealing performance, and ensuring accuracy

Pending Publication Date: 2021-07-27
CNNC NUCLEAR POWER OPERATION MANAGEMENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Solve the inherent problems existing in the sealing plug of the existing small-bore check valve, such as difficult or impossible installation, time-consuming, and can not guarantee that the entire sealing measurement result will be affected by the irregularity of the pipeline

Method used

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  • Online sealing performance measurement sealing plug for small-caliber nuclear-grade check valve
  • Online sealing performance measurement sealing plug for small-caliber nuclear-grade check valve
  • Online sealing performance measurement sealing plug for small-caliber nuclear-grade check valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Such as figure 1 As shown, the sealing plug includes 5 parts: tightening nut 1, baffle A2, O-ring 3, annular rubber plug 4, and baffle B5.

[0022] Such as figure 2 As shown, the tightening nut 1 has a special three-claw (corner) holding design, which is convenient for direct tightening by hand, without tools, which greatly simplifies the installation process and has strong operability.

[0023] Such as image 3 As shown, the diameter of the outer circle of the baffle 5 is slightly smaller than the diameter of the outlet side of the valve body 7, the diameter of the outer circle of the baffle 2 is slightly larger than the diameter of the outlet side of the valve, and the inclination angle 9 of the cone surface of the baffle A2 is smaller than the inclination angle 8 of the inner cavity of the valve. The round design makes it possible to quickly center the sealing plug and not get stuck in the inner cavity of the valve when installing the sealing plug, and also ensure...

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Abstract

The invention relates to the field of machinery, in particular to an on-line sealing performance measurement sealing plug for a small-caliber nuclear-grade check valve. For the nuclear-grade small-caliber check valve of a power plant, due to the fact that the space is narrow (the minimum operation space is only 82 mm), a complex sealing plug cannot be effectively installed, and the installation efficiency is low. The sealing plug comprises a tightening nut, a baffle A, an O-shaped ring, an annular rubber plug body and a baffle B, the tightening nut penetrates through the baffle A and the baffle B and is connected to the baffle A and the baffle B in a threaded mode, the annular rubber plug body is located between the baffle A and the baffle B, and the whole sealing plug is located in a cavity of a valve body. The sealing plug has the advantages that the sealing performance of the sealing plug and the measurement accuracy can be effectively guaranteed, the measurement efficiency is improved, and the radiation contamination risk of workers is reduced.

Description

technical field [0001] The invention relates to the field of machinery, in particular to a sealing plug for online sealing performance measurement of a small-diameter nuclear-grade check valve. Background technique [0002] After the nuclear grade check valve of the nuclear power plant is overhauled, the tightness after the overhaul can only be measured online, which requires the establishment of a sealed chamber, that is, to block the outlet of the check valve. For some nuclear power plant primary circuit nuclear-grade check valves, there will be a high radiation dose after the opening, which requires the check valve sealing plug to be compact in design, easy for maintenance personnel to install quickly, and has strong sealing properties, and must not Into the system during the boost process. [0003] At present, due to design defects and unsatisfactory user experience of check valve sealing plugs on the market, their applications are very limited. For example, its 4 extr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/00F16J15/02G01M3/00
CPCF16J15/021F16K15/00G01M3/00
Inventor 卢祺邱俊牟杨马少亮黄少华罗飞华郭海挺张绍秋吴港孙国忠赵冬冬蒋勇刘伟陈章许思卓
Owner CNNC NUCLEAR POWER OPERATION MANAGEMENT
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