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Metal armouring rigid coaxial cable

A rigid coaxial, metal armored technology, applied in coaxial cables/analog cables, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of coaxial cable leakage and leakage, and achieve good flame retardancy, The effect of high temperature index, ensuring stability and sealing reliability

Active Publication Date: 2009-05-20
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
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Example 1: Take the theoretical characteristic impedance of 50Ω as an example:

[0016] Polyether ether ketone is selected for the insulating dielectric layer, 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 polyether ether ketone, the thickness is 0.2 mm. After testing, its characteristic impedance is 50±2Ω.

example 2

[0017] Example 2: Take the theoretical characteristic impedance of 75Ω as an example:

[0018] Polyethersulfone is selected for the insulating dielectric layer, 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 polyimide with a thickness of 0.2mm. After testing, its characteristic impedance is 75±3Ω.

[0019] The invention is specially used for the electrical penetration parts of the containment of various nuclear power plants or research reactors to connect the coaxial cables inside and outside the containment.

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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, and specifically relates to a coaxial cable. Background technique [0002] A coaxial cable generally consists 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. Depending on the structure of the insulation layer, the development of coaxial cables has experienced solid polyethylene insulated coaxial cables, chemically foamed polyethylene insulated coaxial cables, and longitudinal hole polyethylene. Insulated coaxial cable and physical foamed polyethylene insulated coaxial cable. Physically foamed polyethylene coaxial cables are widely used because they have the advantages of no pollution to the environment, high foaming degree, good flexibility, low attenuation constant and stable transmission performance. For example, a "coaxial cable" disclosed in Chinese patent CN1545102A 》The coaxial cable has the advantag...

Claims

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Application Information

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Patent Type & Authority Patents(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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