Electrical power cable having expanded polymeric layers

Details Electrical power cable having expanded polymeric layers Electrical power cable having expanded polymeric layers

H - Electricity

01

B

H01B 7/20 (2006.01)

Patent

CA 2589166

A cable comprises at least two cores stranded together, an expanded inner jacket layer, a substantially circular metallic armor partially contacting the inner jacket to form unfilled interstices outside the inner jacket, and a polymeric outer jacket. The expanded inner jacket substantially takes the shape of the periphery of the stranded cores, providing a non-circular cross section for the expanded inner jacket. A method of producing a cable comprises providing at least two cores, expanding a polymeric material, extruding the expanded polymeric material around the cores, and allowing the expanded polymeric material to collapse onto the cores. A substantially circular metallic armor is applied, resulting in a plurality of unfilled voids between the inner jacket and the metallic armor. An outer jacket is extruded on the metallic armor.

L~invention concerne un câble comprenant au moins deux brins toronnés ensemble, une couche de chemise interne expansée, une armature métallique sensiblement circulaire touchant partiellement la chemise interne pour former des interstices non remplis à l~extérieur de la chemise interne, et une chemise externe polymérique. La chemise interne expansée prend sensiblement la forme de la périphérie des brins toronnés, présentant une coupe transversale non circulaire pour la chemise interne expansée. Un procédé de fabrication de câble consiste à prendre au moins deux brins, à dilater un matériau polymérique, à extruder le matériau polymérique expansé autour des brins et à laisser le matériau polymérique expansé retomber sur les brins. Une armature métallique sensiblement circulaire est appliquée, ce qui crée une pluralité d~espaces vides entre la chemise interne et l~armature métallique. Une chemise externe est extrudée sur l~armature métallique.

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