Lead sheath copper wire shielding composite high-voltage power cable

Abstract

The invention discloses a lead sheath copper wire shielding composite high-voltage power cable. The lead sheath copper wire shielding composite high-voltage power cable includes a conductor, the conductor and a semiconductive belting, a conductor shielding layer, an insulating layer and an insulation shielding layer which adopt a four-layer structure form an insulating wire core, the insulating wire core is wrapped by a semicondcutive buffer strip of a thickness of 0.5mm, a copper wire shielding tape is woven outside the semiconductive buffer strip and is wrapped by a semiconductive buffer water-blocking tape, then a lead sheath is extruded outside the semiconductive buffer water-blocking tape, finally an outer sheath is extruded, and a surface of the outer sheath is coated with a graphite layer. Starting from cost saving and environmental pollution, the invention designs the lead sheath copper wire shielding composite high-voltage power cable under the condition of satisfying extra-high-voltage cable laying environment, effectively solves the problem that the shielding layer bears the function of single-phase fault short-circuit current, and can also bear tensile force that needs bearing in vertical laying, and the biggest advantage is that in a production process, a risk of burning a main insulating wire core does not exist, thereby guaranteeing product quality and service life.

Description

technical field [0001] The invention relates to the technical field of distribution cables, in particular to a composite high-voltage power cable with lead sheath and copper wire shielding. Background technique [0002] Today, my country's 110KV and 220KV EHV cables are widely used in power systems. The use of ultra-high voltage cables is laid in a variety of environments, and the requirements for cables are different for different environments. At present, the ultra-high voltage cables manufactured are usually wrapped with water-blocking tapes as longitudinal waterproof, welded or extruded aluminum sheath structure As a radial waterproof, such products can meet the waterproof requirements, but in some local environments, such products cannot be applied to areas with high salinity in soil or water. At the same time, because the aluminum sheath is easily corroded by salt, water enters the cable. When the cable runs for a long time, water trees will be generated, which will e...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems in the prior art, the present invention provides a lead-sheathed copper wire shielded composite high-voltage power cable, which solves the problem that the shielding layer bears the single-phase fault short-circuit current, and can also bear the tensile force required for vertical laying question

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