Split mechanical sealing device and method for nuclear power CRDM tube socket

Abstract

The invention provides a split mechanical sealing device for a nuclear power CRDM tube socket, a first cavity and a second cavity which are communicated with each other are arranged in the open end ofthe tube socket, a first step is formed at the joint of the first cavity and the second cavity, and the device comprises a sealing piece made of a flexible material and embedded in the second cavity,a sealing piece is of a cylindrical structure, the diameter of the sealing piece is matched with that of the second cavity, the first end of the sealing element corresponds to the tube seat opening end, a sealing shaft is fixedly connected with the sealing piece, a second step is arranged at the first end of the sealing shaft, the end face of the second step abuts against the end face of the first step, the second end of the sealing shaft abuts against the first end of the sealing piece, a pressing cover is arranged, the first end of the pressing cover is located outside the first end of thepipe base, the diameter of the second end of the pressing cover is matched with the diameter of the first cavity, the second end of the pressing cover is embedded into the first cavity and abuts against the first end of the sealing shaft, and the second end of the pressing cover is fixedly connected with the pipe base through a thread pair. The invention further provides a split mechanical sealingmethod for the nuclear power CRDM tube socket.

Description

technical field [0001] The invention relates to the technical field of nuclear power pressure vessels, in particular to a split mechanical seal device and method for nuclear power CRDM sockets. Background technique [0002] Under the guidance of low-carbon economy and green economy, countries all over the world are making energy strategic choices, such as energy conservation and emission reduction, strengthening clean coal, or actively developing nuclear power and strengthening renewable energy. Currently, low-carbon energy that can be built on a large scale in China, in addition to hydropower and some new energy, nuclear power, as a clean special energy, plays an important role in the selection of low-carbon energy. With the continuous improvement of the localization rate of nuclear power equipment, how to control the manufacturing quality of nuclear power equipment, especially the manufacturing quality of the main equipment of the nuclear island, has become an important is...

AI Technical Summary

Problems solved by technology

Due to the high precision of the inner diameter of the CRDM pipe seat, if it is directly sealed with a metal material, it is easy to scratch the inner surface of the CRDM pipe seat

It is difficult to maintain the pressure when the water pressure is high when using a softer material for sealing.

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