Lockable quick-fit sealing structure for small diameter tubular structure

Abstract

The invention discloses a lockable quick-installation sealing structure for a small-diameter tubular structure. The sealing structure is used for static sealing of the pipe seat at the connection point between the connecting pipe and the pressure vessel or pressure pipeline. The sealing structure includes a separating half ring , a sealing ring, and a hollow bolt; there are at least two separate half-rings, and an annular groove is provided on the side where the connecting pipe goes deep into the socket; the hollow bolt is provided with a through hole for the connecting pipe to pass through, and the axis of the through hole It is collinear with the axis of the hollow bolt, and the through hole and the connecting pipe are in a clearance fit relationship; the sealing ring is sleeved on the connecting pipe, and the sealing ring is located between the hollow bolt and the separation half ring. When the hollow bolt penetrates into the pipe seat, The sealing ring can be squeezed and deformed. The sealing structure has the advantages of simple structure, convenient installation, high sealing reliability and easy popularization.

Description

technical field [0001] The invention relates to the technical field of a sealing structure used for nuclear reactor core measurement and primary circuit pipeline temperature measurement tubular structure, in particular to a lockable quick-install sealing structure for a small-diameter tubular structure. Background technique [0002] Since the nuclear reactor core measurement system needs to measure the core outlet temperature, the core neutron fluence rate or the core water level, and some primary circuit pipelines need to measure the reactor inlet and outlet temperature, so the reactor pressure vessel or pipeline Tubular structural members such as detectors or thermocouple protection tubes are set up to measure the above parameters. [0003] For tubular structural parts such as detectors or thermocouple protection tubes, a tube seat is generally set on the pressure vessel or the primary circuit pipeline, and the tubular structural part is inserted and positioned on the tube...

AI Technical Summary

Problems solved by technology

[0003] For tubular structural parts such as detectors or thermocouple protection tubes, a tube seat is generally set on the pressure vessel or the primary circuit pipeline, and the tubular structural part is inserted and positioned on the tube seat, between the tubular structural part and the tube seat Set the sealing structure. The widely used sealing structure is generally divided into two types: mandatory sealing and self-tightening sealing. The mandatory sealing is provided by the fastener and the thread of the pipe seat to provide pre-tightening force to compress the metal gasket. The disadvantage of the structure is that the resilience of the metal gasket is average. As the temperature and pressure of the reactor change, the sealing structure is prone to leakage; the structure of the self-tightening seal is generally more complicated, and the installation process is also more complicated. The complicated structure and installation The process can cause position error during assembly of the complex sealing structure, the deviation between the actual pressing force and the theoretical pressing force is large, and the sealing ring is prone to excessive or undercompression, all of which will affect the current situation. With the sealing effect of self-tightening seal, the pressure vessel or pressure pipeline has a greater hidden danger of leakage

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