Novel electric cable reinforced core and preparation method thereof

Abstract

The invention discloses a novel electric cable reinforced core, which is composed of a fiber reinforced composite material, the fiber reinforced composite material comprises at least a reinforced fiber type which has longitudinal orientation in the resin and is basically continuous and is used as an inner layer composite material core; the fiber reinforced composite material further comprises a braided or twined reinforced protective outer layer around the inner layer composite material core, the reinforced protective outer layer comprises at least a reinforced fiber type which is braided in the resin and is basically continuous. The longitudinal fiber and the braided fiber are composited in the invention, thereby having the advantages that the longitudinal tensile strength, the resist compression strength, the bending resistance and the shearing resistance of the electric cable reinforced core in the longitudinal direction are increased, and the safety factor are increased, and the loss of the mechanical performance caused by defects owning to external abrasion or impact in the transportation process, the laying and installing process and the operation process is avoided.

Description

technical field [0001] The invention relates to the field of materials for power transmission, in particular to a novel cable reinforcement core and a preparation method thereof. Background technique [0002] The current power development can no longer meet the requirements of economic development, and the transmission capacity of transmission lines needs to be continuously increased, which will involve the transformation and erection of power lines. The transformation of lines and the replacement of circuit towers will not only affect the economy and national life, but also The cost is very large and land resources are limited, so the development of large-capacity overhead conductors has become an immediate need. Aiming at the disadvantages of the steel core structure with a reinforced core for traditional overhead wires, such as heavy weight, high thermal expansion coefficient, and low strength, in actual use, it will bring problems such as serious sag, low temperature res...

AI Technical Summary

Problems solved by technology

At present, the fiber composite core cable reinforcement core developed at home and abroad uses a unidirectional fiber reinforced resin system, which makes the transverse compressive strength of the mandrel poor and prone to longitudinal cracking

Moreover, in the process of construction and erection, in order to avoid damage to the composite cable core, the construction fittings must be improved before they can be used, which brings inconvenience in use.

And the mandrel is in direct contact with the conductor and the external environment, and thermal aging in a long-term high-temperature environment will lead to a reduction in the life of the mandrel

[0003] Therefore, it is of great significance to design a cable reinforcement core structure and preparation method with a certain transverse strength under the premise of ensuring the longitudinal strength, and to solve the problems that the composite reinforcement core is prone to longitudinal cracking during transportation, installation, laying, and use.

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