Production process of stable-phase and stable-amplitude cable

Abstract

The invention discloses a production process of a stable-phase and stable-amplitude cable, and the cable comprises a silver-plated copper center conductor, a polytetrafluoroethylene wrapping insulation dielectric layer is wound outside the silver-plated copper center conductor, a silver-plated copper wrapping process is carried out outside the polytetrafluoroethylene wrapping insulation dielectric layer to form an inner shielding layer, a microporous silver tape layer is wrapped outside the inner shielding layer, the wrapping direction of the inner shielding layer is opposite to that of the microporous silver tape layer, a silver-plated copper wire braided outer shielding layer is arranged outside the microporous silver tape layer, and a conductor protection layer is arranged outside the silver-plated copper wire braided outer shielding layer; after the insulation dielectric layer is wrapped, the silver-plated copper wire outer shielding layer is woven, and the conductor protection layer is extruded, high-temperature thermal shock treatment is performed on the insulation dielectric layer, the silver-plated copper wire outer shielding layer and the conductor protection layer; and the production process has the advantages that the internal stress is released by performing high-temperature thermal shock on the cable, and the anti-electromagnetic and anti-interference capabilities are improved by adopting the microporous silver tape for wrapping.

Description

technical field [0001] The invention belongs to the technical field of cable manufacturing, and in particular relates to a production process of a phase-stable and amplitude-stable cable. Background technique [0002] The phase stability of the cable includes mechanical phase stability and temperature phase stability. Mechanical phase stability: refers to the phase change of the coaxial cable during bending and vibration. Temperature phase stability: refers to the phase change of the coaxial cable during the temperature activation process. Regardless of whether it is mechanical phase stability or temperature stability, the smaller the phase change, the better, which means that the temperature and mechanical changes of a single cable are required to be kept within a certain range. [0003] Amplitude stabilization refers to phase adjustment between different cables. [0004] The cables in the prior art generally include a central conductor, a wrapping dielectric layer, an in...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN111403115B discloses a production process for stable amplitude and phase cables. The production process includes the following steps: using a low-density polytetrafluoroethylene tape wrapping process on the central conductor as the insulating medium layer of the cable; The final dielectric layer is wrapped with silver tape to form the inner shield of the cable, and the inner shield is braided with silver-plated copper wire as the outer shield and protective layer of the cable, and then extruded by high-temperature fluoroplastics , to form the environment-resistant protective layer of the cable. The dielectric layer needs to be subjected to high and low temperature cold and heat treatment. The cable after the high and low temperature cold and heat treatment is treated with plasma spray in advance in the next process of silver-plated copper tape wrapping production. On the basis of the original stable amplitude and phase cable structure, through the control of the production process, the thermal expansion and contraction coefficients of the cable are close when the cable is extruded at high temperature, reducing the gap between the second dielectric layer and the third inner layer shield and Extrusion, so that the phase stability performance is improved; it can be seen that the technical solution is to transfer the dielectric layer between low temperature and high temperature multiple times, which is a thermal cycle process, but due to the large temperature difference, the ambient temperature cannot be controlled during the transfer process , and the instantaneous impact of temperature on the cable cannot be carried out, which will easily lead to the defect that the modification effect is not good

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