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Metal armouring rigid coaxial cable

A rigid coaxial, metal armored technology, applied in the direction of coaxial cable/analog cable, organic insulator, plastic/resin/wax insulator, etc. High temperature index, the effect of ensuring the consistency of structure size

Active Publication Date: 2008-03-26
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in some reactors, coaxial cables laid on site are used to directly penetrate the shielding wall of the reactor containment. For this type of penetration, the seal between the cable and the penetration sleeve is easy to achieve, but the leakage through the coaxial cable itself is unavoidable. , become the main channel of leakage

Method used

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  • Metal armouring rigid coaxial cable

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Example 1: Take the theoretical characteristic impedance of 50Ω as an example:

[0018] The insulating medium layer is polyetheretherketone, the wire gauge of the inner conductor is AWG16, the nominal diameter is Φ1.29mm, the inner diameter of the outer conductor is Φ5.73mm, the wall thickness is 1mm, the material of the outer sheath is polyetheretherketone, and the thickness is 0.2 mm. After testing, its characteristic impedance is 50±2Ω.

example 2

[0019] Example 2: Take the theoretical characteristic impedance of 75Ω as an example:

[0020] The insulating medium layer is made of polyethersulfone, the wire gauge of the inner conductor is AWG16, the nominal diameter is Φ1.29mm, the inner diameter of the outer conductor is Φ12.49mm, the wall thickness is 1.5mm, and the outer sheath is made of polyimide with a thickness of 0.2mm. After testing, its characteristic impedance is 75±3Ω.

[0021] The invention is specially used for electrical penetrating parts of containment shells of various nuclear power plants or research reactors to connect coaxial cables inside and outside the containment shells.

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Abstract

This invention relates to a metallic armored rigid coaxial cable including an inner conductor, a dielectric layer, an outer conductor and an outer jacket characterizing that the inner conductor is oxygen-free copper wire, the dielectric layer is formed by step cylindrical blocks in series matched in convexes and concaves of heads and tails made of multiple sets of polysulfone, polyethersulfone, polyimide and PEEK engineering plastics, the outer conductor is oxygen-free copper pipe and the jacket is made of the engineering plastics. Advantages: reliable transmission, high mechanical performance, anti-radiation, anti-aging, fire and good in air-tightness.

Description

technical field [0001] The invention belongs to a cable, in particular to a coaxial cable. Background technique [0002] A coaxial cable is generally mainly composed of an inner conductor, an insulating layer, an outer conductor and an outer sheath. At present, most common coaxial cables use polyethylene as the insulating material. According to the structure of the insulating layer, the development of coaxial cables has successively experienced solid polyethylene insulated coaxial cables, chemically foamed polyethylene insulated coaxial cables, and longitudinal hole polyethylene. Insulated coaxial cables and physically foamed polyethylene insulated coaxial cables. Because physical foamed polyethylene coaxial cables have the advantages of no pollution to the environment, high foaming degree, good flexibility, small attenuation constant and stable transmission performance, they are widely used, such as a kind of "coaxial cable" disclosed in Chinese patent CN1545102A 》, the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B11/18H01B3/42
Inventor 罗志远王广金赵海江
Owner NUCLEAR POWER INSTITUTE OF CHINA
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