Triaxial hard cable component

Abstract

The invention relates to a triaxial hard cable component. A triaxial hard cable is assembled in a shell at the tail part of a connector, penetrates an inner bushing and an inner insulator in the connector and is welded with a central contact element by adopting a high-temperature soldering tin wire; the periphery of the inner bushing is provided with knurls and is fixed in a middle conductor in aforced mounting mode, the tail end of the inner bushing is provided with an opening to enable the tail end of the inner bushing to be an elastic structure, the cable inner shielding layer is insertedinto the tail end of the elastic structure of the inner bushing to have a fixing effect on the inner shielding layer, the outer shielding layer of the triaxial hard cable is connected with the tail end of the tail shell in an induction brazing mode, and the connection of the periphery of the inner shielding layer and the tail end of the inner bushing is plated with gold; and the connection of theinner wall of the tail portion of the shell and the outer shielding layer is plated with nickel. The triaxial hard cable component can achieve quick and reliable connection of the triaxial hard cableand the connector, is reliable in connection, ensures the reliability and the sealing property of the connection, improves the welding strength and ensures the reliable sealing performance and the good electrical performance of the component under various working conditions.

Description

technical field [0001] The invention relates to a triax rigid cable assembly. Background technique [0002] The feedthrough feedthrough for nuclear testing equipment outside the nuclear power plant is a triaxial rigid cable, the central conductor, inner shield, and outer shield are made of copper, the inner insulation is polysulfone, and the outer insulation is polyimide. After the feedthrough of the feedthrough is integrated with the connector, it needs to meet the working environment requirements such as 60-year design life, high temperature resistance, high radiation resistance, earthquake resistance, design basis accident (high temperature, high pressure steam environment), etc. Currently, the integration of feedthroughs and connectors has the following difficulties: [0003] 1) The termination of the shielding layer of the three-axis hard cable is generally welded. Since the product needs to withstand high temperature of 226 ° C, it needs to be welded with high-tempera...

AI Technical Summary

Problems solved by technology

[0003] 1) The termination of the shielding layer of the triaxial hard cable is generally welded. Since the product needs to withstand a high temperature of 226°C, it needs to be welded with high-temperature solder wire. Due to the large welding area, the required welding time is longer, and the inner insulation of the cable The maximum temperature resistance of the material is 190°C, which causes the inner insulating layer to melt when the inner shielding layer of the cable is welded to the intermediate conductor of the connector;

[0004] 2) The outer shielding layer of the cable is a copper tube, which produces mirror reflection during laser welding, and the heat cannot be concentrated, and the welding of the copper and the stainless steel shell of the connector is made of different materials, and the welding strength is low

[0005] 3) The inner shielding layer and the outer shielding layer of the feedthrough line are copper tubes, which are thicker and have better ductility. It is extremely difficult to strip the wires by using the traditional stripping process, and it is easy to cause the cable shielding layers to overlap each other, making the cable electric performance failure

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