Sealing assembly

Abstract

The invention relates to a sealing assembly, which comprises a straight sleeve, nuts for being in threaded connection with connecting parts with threads at the two ends of the straight sleeve, and a front sleeve and a rear sleeve arranged between the nuts and the corresponding connecting parts to play a sealing role. After the sealing assembly and a part to be sealed are assembled in place, A conical surface I at the back end of the inner wall of one connecting part and a conical surface II on the outer wall of the front sleeve are closely connected to form a seal, a conical surface III at therear end of the front sleeve and a conical surface IV on the rear sleeve are matched to form a seal, a conical surface V on the rear sleeve and a conical surface VI in one nut are closely matched toform a seal, the front end of the front sleeve is compressed in a gradual-diameter cavity I formed between the conical surface I and the part to be sealed, the front end of the rear sleeve is compressed in a gradual-diameter cavity II formed between the conical 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 inside. The sealing assembly can prevent the steam from entering the inside through a rubber sealing ring at the head-base plugging fit position of connectors and improve the environmental tolerance ofa connector assembly to a designed reference 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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