An oil-immersed high-voltage coaxial cable joint

Abstract

The invention discloses an oil-immersed high-voltage coaxial cable joint, and aims to provide the high-voltage coaxial cable joint with good sealing and insulating effects for the oil immersion condition. The cable joint is composed of a cable male head, a cable female head and an oil injection cylinder. The cable male head is composed of a male head flange, an outer conductor connecting body, aninner conductor connecting body and a rubber fixing piece. The cable female head is composed of a female head flange, a hollow rubber circular truncated cone and a female head connecting body. The oilinjection cylinder is composed of an oil injection cylinder shell, an inner conductor column and an insulator. The cable male head is connected with the oil injection cylinder, a high-voltage coaxialcable sequentially penetrates through the cable male head and the cable female head and is inserted into the oil injection cylinder, and transformer oil is injected into the oil injection cylinder. The hollow rubber circular truncated cone is located between the female head flange and the cable, the rubber fixing piece is located between the male head flange and the female flange, the hollow rubber circular truncated cone is extruded by the rubber fixing piece to deform to fill a gap, and the sealing of the oil injection cylinder shell is achieved. The oil-immersed high-voltage coaxial cablejoint has the advantages of good sealing effect, high insulation grade and simple structure.

Description

technical field [0001] The invention relates to the technical field of high-power pulse driving sources, in particular to an oil-immersed high-voltage coaxial cable joint. Background technique [0002] The needs of national defense and industrial applications have prompted the development of high-power pulse drive source technology in the direction of solid-state and modularization. These applications include high-power microwaves, high-power pulsed lasers, material surface treatment, industrial waste gas and wastewater treatment, and food sterilization and disinfection. The use of high-voltage coaxial cables to realize the connection between solid-state modules can provide convenient conditions for module debugging and device integration; therefore, the development of high-voltage coaxial cable matching connectors with excellent performance is of great significance to the debugging and operation of the device . The single-core or multi-core connectors of the existing high-...

AI Technical Summary

Problems solved by technology

[0009] When the inner diameter of the cable female head 3 is similar to the radius of the cable 1, the installation effect of the above-mentioned cable joint is better; however, in this structure, the contact surfaces of the cable male head and the female head are hard-connected. In some cases, it is easy to have unreliable connection, only a certain point of contact, and it is easy to catch fire when a large current passes through, which will affect the subsequent pulse transmission

[0010] This kind of high-voltage coaxial cable joint has a long axial length, low insulation strength, poor sealing effect in the case of oil immersion, and the risk of transformer oil leaking from the interface gap. In actual use, for the same cable female head, it may Cables of various specifications need to be connected, especially when the cable radius is small, the cables are prone to bending and it is difficult to achieve accurate connection, and there is a risk of fire

[0011] To solve the problem of unstable contact, existing patents (such as the Chinese patent "A High-Voltage Coaxial Cable Connector" with application number 201811564083.1) have improved the connection effect of the high-voltage coaxial cable connector as a whole by introducing springs and other components, but they still do not have a seal ability, unable to make high-voltage coaxial cable joints work in oil-immersed conditions

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