Wear-resistant cable for shield tunneling machine and preparation method of wear-resistant cable

By improving the sheath material composition and structure of shield machine cables, the problem of easy crack propagation in cables under impact loads has been solved, the high impact strength and wear resistance of the cables in complex environments have been achieved, and the reliability and service life of the shield machine have been improved.

CN120682578APending Publication Date: 2025-09-23XINGTAI XILONG CABLE CO LTD
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Patent Information

Application Number
CN202510763230.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-09
Publication Date
2025-09-23

AI Technical Summary

Technical Problem

The sheath material of existing shield machine cables is prone to crack propagation and brittle fracture under impact loads, resulting in a contradiction between wear resistance and impact strength, and cannot meet the needs of long-term stable operation.

Method used

The sheath layer material is composed of polyvinyl chloride, chlorinated polyethylene, plasticizer, stabilizer, antioxidant, lubricant, compatibilizer and vulcanizer. By adjusting the Mooney viscosity of chlorinated polyethylene and adding composite layered silicate minerals, the flexibility, strength and wear resistance of the material are enhanced, forming a synergistic effect to improve the impact strength.

Benefits of technology

The impact strength and wear resistance of shield machine cables are improved, ensuring the stability and reliability of cables in complex environments and extending their service life.

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Abstract

The invention relates to the technical field of underground cables, and provides a wear-resistant cable for a shield tunneling machine and a preparation method of the wear-resistant cable. The wear-resistant cable for the shield tunneling machine comprises a conductor, an insulating layer, an armor layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer is prepared from the following raw materials in parts by weight: 90-100 parts of polyvinyl chloride, 8-14 parts of chlorinated polyethylene, 8-10 parts of a plasticizer, 9-16 parts of filler, 1-4 parts of a stabilizer, 1-2 parts of an antioxidant, 1-3 parts of a lubricant, 1-3 parts of a compatilizer and 1-2 parts of a vulcanizing agent; the chlorinated polyethylene comprises first chlorinated polyethylene and second chlorinated polyethylene; the Mooney viscosity of the first chlorinated polyethylene is 40-60 under the conditions of ML1 + 4 and 121 DEG C; and the Mooney viscosity of the second chlorinated polyethylene is 70-90 under the conditions of ML1 + 4 and 121 DEG C. According to the technical scheme, the problem of poor impact strength of the wear-resistant cable for the shield tunneling machine in the prior art is solved.
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