Dynamic submarine cable assembly for deep water

Abstract

The invention discloses a dynamic submarine cable assembly for deep water. The dynamic submarine cable assembly comprises a dynamic submarine cable body. The dynamic submarine cable body comprises a cable core. The cable core is coated with an inner sheath. The inner sheath is coated with a steel wire armor layer. The steel wire armor layer is coated with an outer sheath. The dynamic submarine cable assembly is characterized in that the space between the inner sheath and the outer sheath is filled with insulating oil, the insulating oil fills the gaps of the steel wire armor layer, and the dynamic submarine cable body is equipped with a pressure balancing device used for balancing the internal pressure and the external pressure of the dynamic submarine cable body. The dynamic submarine cable assembly for deep water has the advantage that the dynamic submarine cable has better water blocking performance and longer service life because the space between the inner sheath and the outer sheath is filled with the insulating oil and the pressure balancing device is arranged on the dynamic submarine cable body.

Description

technical field [0001] The invention relates to the field of marine engineering, in particular to a dynamic submarine cable assembly for deep water. Background technique [0002] At present, the existing deep-water submarine cables usually have a lead sheath inside to block water. During the specific use of the dynamic submarine cable, it needs to withstand the movement from the upper platform and the wind, waves, and wind in deep water. The load of the current will bend repeatedly in the water, and the lead sheath installed in the dynamic submarine cable for water blocking can hardly bear the long-term bending load, and it is easy to fatigue and crack, resulting in failure. Therefore, how to solve the water blocking of the dynamic submarine cable The problem has become a major technical difficulty in the current dynamic submarine cable manufacturing field; in addition, the dynamic submarine cable used in the deep water environment will be squeezed inward due to the hydrosta...

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Problems solved by technology

[0002] At present, the existing deep-water submarine cables usually have a lead sheath inside to block water. During the specific use of the dynamic submarine cable, it needs to withstand the movement from the upper platform and the wind, waves, and wind in deep water. The load of the current will bend repeatedly in the water, and the lead sheath installed in the dynamic submarine cable for water blocking can hardly bear the long-term bending load, and it is easy to fatigue and crack, resulting in failure. Therefore, how to solve the water blocking of the dynamic submarine cable The problem has become a major technical difficulty in the current dynamic submarine cable manufacturing field; in addition, the dynamic submarine cable used in the deep water environment will be squeezed inward due to the hydrostatic pressure of seawater on the outer sheath, and the extrusion force will be transmitted to the dynamic submarine cable. On the steel wire armor, it will greatly increase the friction stress of the steel wire armor under repeated bending, and eventually cause the steel wire armor to break due to fatigue cracks. In order to reduce the influence of seawater hydrostatic pressure on the steel wire armor, it can Open holes to achieve the balance of internal and external pressure, but open holes in the outer sheath, seawater can easily enter the interior of the submarine cable through the openings on the outer sheath, causing the problem of steel wire armor being corroded by seawater, which will affect the service life of the dynamic submarine cable make an impact

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