Self-tightening sealing structure for single detector

Abstract

The invention discloses a self-tightening sealing structure for a single detector. The self-tightening sealing structure comprises the detector, a tube base and a tubular connecting piece, wherein the tube base is provided with a fluid cavity and a detector introducing passage communicated with the fluid cavity; the lower end of the tubular connecting piece is arranged inside the detector introducing passage and connected with the tube base; the lower end of the detector is arranged inside the fluid cavity after passing through an inner bore of the tubular connecting piece and the detector introducing passage. An annular supporting platform is formed on the inner wall of the detector introducing passage; the detector is connected with a separation ring which is positioned below the tubular connecting piece and arranged on the annular supporting platform; a filling sealing member is arranged in an area between the tubular connecting piece and the separation ring. The self-tightening sealing structure is simple integrally, is convenient to install and disassemble, and has a reliable self-tightening sealing function to ensure a good sealing effect and improve the safety of the detector.

Description

technical field [0001] The invention relates to a sealing structure for a detector in nuclear reactor core measurement, in particular to a self-tightening sealing structure for a single detector. Background technique [0002] Since the nuclear reactor core measurement system needs to measure the core outlet temperature, core neutron fluence rate or core water level, a variety of detectors are installed inside the reactor pressure vessel to measure the above parameters. The detectors are generally introduced into the stack in two ways, one is that multiple detectors are integrated into a bunch and introduced into the stack, and the other is that a single detector is introduced into the stack separately. [0003] When the detector is introduced into the stack, a sealing structure for the detector needs to be installed, and the sealing structure is installed on the pressure vessel socket to provide a sealing function for the detector. Nowadays, for a single detector introduced...

AI Technical Summary

Problems solved by technology

Nowadays, for a single detector introduced into the stack, it is generally adopted to put the detector into a closed protective tube, and set a sealing structure for the protective tube. The sealing structure adopts a mandatory sealing method in which the thread provides a pre-tightening force to compress the gasket. This structure The disadvantage is that because the detector is installed in the protective tube, and the protective tube has a certain thickness, which will affect the measurement response performance of the detector, and the sealing performance of the sealing structure is general, when the temperature and pressure of the reactor change, the gasket is easy to appear Leakage, increasing the radiation dose in the reactor building

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