a sealing component

Abstract

The invention relates to a sealing assembly, which comprises a straight sleeve, a nut used for threaded connection with the connecting parts with threads at both ends of the straight sleeve, and a front seal set between the nut and the corresponding connecting part for sealing. sleeve and rear sleeve; after the sealing assembly and the parts to be sealed are assembled in place, the conical surface Ⅰ at the rear end of the inner wall of the connection part and the conical surface Ⅱ on the outer wall of the front sleeve are tightly fitted to form a seal; the conical surface Ⅲ at the rear end of the front sleeve and the cone on the rear sleeve The surface IV fits to form a seal, the tapered surface V on the back sleeve and the tapered surface VI in the nut are tightly fitted to form a seal, and the front end of the front sleeve is pressed against the gradually changing diameter formed between the tapered surface I and the part to be sealed. In cavity I, the front end of the rear sleeve is pressed into cavity II with tapered diameter formed between the cone surface III and the part to be sealed, so that the part to be sealed is sealed in the straight sleeve to prevent steam from entering. The invention can prevent steam from entering through the rubber sealing ring at the mating place of the connector head seat, and improve the environmental resistance of the connector assembly to the designed benchmark accident.

Description

technical field [0001] The invention relates to a sealing assembly. Background technique [0002] The connection between the connector and the cable can be sealed by glue filling, welding, etc., without disassembly, and reliable sealing can be guaranteed through process control. The mating part of the connector head seat is often sealed with a rubber sealing ring due to the need for separation and mating. The rubber sealing ring has a simple installation structure, small operating torque, and can be plugged and pulled out many times. It has a good sealing effect in water-sealed and air-sealed occasions under general conditions. However, in the high-temperature, high-pressure steam environment of nuclear power plant design basis accidents, because the rubber material has a certain air permeability, it is difficult for the rubber sealing ring structure to 100% block the moisture from entering. It has been verified by many tests that the insulation resistance of connector com...

AI Technical Summary

Problems solved by technology

[0003] The mating part of the connector head seat is also sealed with a metal sealing ring. The metal sealing ring has certain advantages in high temperature resistance and radiation resistance, but the tightening torque is relatively large, and a new metal sealing ring needs to be replaced every time it is disassembled. The cost is high, and there is no obvious advantage over the rubber sealing ring in the design basis accident simulation test

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