Preparation method of optical fiber insulator

By using a liquid crystal-elastomer self-assembled sheath material system and multi-level surface treatment technology, the problems of interface stress concentration and insufficient mechanical anchoring in optical fiber insulators have been solved, improving the mechanical stability and electrical reliability of the insulators and making them suitable for extreme environments.

CN121034780AActive Publication Date: 2025-11-28BEIJING KERUITE TECHNOLOGY CO LTD +1
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Patent Information

Application Number
CN202511170987.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-21
Publication Date
2025-11-28
Estimated Expiration
2045-08-21

AI Technical Summary

Technical Problem

During long-term service, fiber optic insulators may experience insulation performance degradation and breakage risks due to problems at the material, structural, and interface levels.

Method used

By employing a liquid crystal-elastomer self-assembled sheath material system, optimizing the core rod spiral groove structure, and using multi-level surface treatment technology, the thermal expansion coefficient of the sheath material is adaptively controlled through magnetic field-induced directional alignment of liquid crystal micro-regions. Combined with spiral groove design and multi-level surface treatment, the interface durability and electrical reliability are improved.

Benefits of technology

It significantly improves the mechanical stability, environmental adaptability and electrical reliability of optical fiber insulators, making them suitable for extreme environments such as ultra-high voltage power transmission, high-altitude cold and coastal salt spray, and extending their service life.

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Abstract

The invention discloses a preparation method of an optical fiber insulator, and relates to electrical equipment and insulator technologies, and the preparation method comprises the steps: carrying out spiral groove cutting on a composite core rod, and sequentially carrying out phosphating treatment, plasma activation and nano coating deposition treatment; performing fitting treatment on the optical fiber and the treated composite core rod; the surface of the composite core rod is wrapped with a prepared sheath, the sheath is of a microphase separation structure formed by mixing liquid crystal polymer LCP and hydrogenated nitrile rubber HNBR as base materials according to the specified mass ratio, injection molding is conducted through a magnetic field induction orientation technology, the axial thermal expansion coefficient of the sheath is reduced to 28 * 10 / K to be close to that of the core rod, and the core rod is made of a composite material. The radial thermal expansion coefficient is kept at 90 * 10 / K and is close to the umbrella skirt; the outer side of the sheath is provided with umbrella skirts, and the two ends of the composite core rod are provided with hardware fittings. According to the method, self-adaptive regulation and control of the thermal expansion coefficient of the sheath material can be realized, and the anchoring stability, the interface durability and the electrical reliability of the optical fiber are remarkably improved.
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