High-voltage low-wave impedance coaxial water cable

Abstract

The invention discloses a high-voltage low-wave impedance coaxial water cable, which sequentially comprises a central water-filled tube, a central conductor, an insulating sheath, an outer-layer conductor and a polyurethane outer sheath from inside to outside. The high-voltage low-wave impedance coaxial water cable is characterized in that: the central water-filled tube has a hollow structure; the central conductor is braided or wrapped outside the water-filled tube; high voltage resistant insulating paper, rubber insulating tapes and a polyurethane inner sheath are sequentially arranged between the insulating sheath and the outer-layer conductor; a plurality of layers of high voltage resistant insulating paper are lapped outside the insulating sheath of the central conductor; a pluralityof layers of rubber insulating tapes are lapped outside the high voltage resistant insulating paper; the polyurethane inner sheath is extruded on the outer layer of the rubber insulating tapes; the outer-layer conductor is braided or wrapped outside the polyurethane inner sheath; and the polyurethane outer sheath is extruded outside the outer-layer conductor. The high-voltage low-wave impedance coaxial water cable has the characteristics of relatively lower wave impedance of less than 10 ohms, relatively higher high voltage resistance of not less than 50KV, small external cable diameter and effectively ensured flexibility and portability.

Description

technical field [0001] The invention relates to a coaxial cable, in particular to a low wave impedance and high voltage resistant coaxial water cable. Background technique [0002] The definition of a coaxial cable is a basic unit (coaxial pair) composed of two coaxial, mutually insulated cylindrical metal conductors, and then a cable composed of a single or multiple coaxial pairs. A coaxial cable consists of a center conductor, a layer of insulating material, a screen (outer conductor) of mesh fabric, and an outer layer of isolating material. [0003] Coaxial cables can be divided into types such as high-frequency coaxial cables and high-voltage coaxial cables. High-frequency coaxial cables are mainly used in broadband networks, wireless communications and other fields. They can transmit microwave frequency bands and have the characteristics of low loss and noise shielding; high-voltage coaxial cables are mainly used in power transmission and other fields, and the withstan...

AI Technical Summary

Problems solved by technology

Therefore, in the high-voltage plasma discharge device, the application of coaxial cables with high wave impedance will result in high transmission loss and low energy transmission efficiency.

[0006] In addition, in the drilling fluid circulation device required by the pulsed plasma drilling rig, two sets of pipelines are required for the injection and discharge of the drilling fluid. In addition to the above-mentioned pulse transmission cable, three sets of pipelines are required while drilling. The design of the drilling rig is complicated and the operation is difficult. Big

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