Composite cables for offshore oil platforms

Abstract

The invention discloses a composite cable used for an offshore oil platform. The composite cable is characterized in that the composite cable comprises main cable cores, outdoor cable bodies used for communication, a wrapping belt, an inner protection sleeve, an armor layer and an outer protection sleeve. The number of the main cable cores is three. Each main cable core is sequentially provided with a conductor, a conductor shielding layer, an insulating layer, an insulating nonmetal shielding layer and an insulating metal shielding layer from inside to outside in the radial direction of the main cable core, wherein the conductor shielding layer, the insulating layer and the insulating nonmetal shielding layer is wrapped on the conductor in a three-layer co-extrusion mode. Each insulating metal shielding layer is wrapped on the corresponding insulating nonmetal shielding layer. The number of the outdoor optical fiber bodies is three. The wrapping belt is wrapped on the main cable cores and the outdoor optical fiber bodies used for communication, wherein the main cable cores and the outdoor optical fiber bodies used for communication are stranded together. The inner protection sleeve is arranged on the periphery of the wrapping layer in a co-extrusion mode. The armor layer is located outside the inner protection sleeve. The outer protection sleeve is wrapped on the armor layer.

Description

technical field [0001] The invention relates to a composite cable for offshore oil platforms. Background technique [0002] In recent years, with the development of submarine photoelectric composite cables, the electricity used by offshore oil platforms can be transmitted from land through submarine optical cables, and then transferred to the platform through power cables for ship electrical equipment, and then supplied to various system applications through transformer conversion. It solves the shortcomings of large energy consumption, high noise, and large space used in the past caused by generator sets for power generation. However, at present, the voltage level of the submarine photoelectric composite cable commonly used in my country is 35kV, so it is necessary to connect the ship electrical equipment that matches this voltage level with a power cable. At present, the international power cable standard for marine electrical equipment adopts the IEC60092-354 standard. T...

AI Technical Summary

Problems solved by technology

At present, the international power cable standard for ship electrical equipment adopts the IEC60092-354 standard. The highest voltage level of this standard is 18 / 30kV. At present, there is no voltage level of 26 / 35kV in the world. The electrical equipment of ships with matching grades is connected by power cables, so the major shipyards can only choose 26 / 35kV power cables for land systems instead, and the power cables for land systems of this voltage level use cross-linked Polyethylene insulation, cross-linked polyethylene material will form water branches under the action of electric field to discharge when water is immersed, the insulation layer is easy to break down, the reliability is poor, the life is short, it needs to be replaced frequently, and the maintenance cost is too high

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