Combined submarine cable untwisting system for untwisting submarine cables of various cross-sections

Abstract

The invention discloses a combined type submarine cable back twisting system used for multi-section submarine cable back twisting and relates to a submarine cable back twisting system. The back twisting way of submarine cables is single and cannot be applied to submarine cables of different diameters. The combined type submarine cable back twisting system comprises a submarine cable reel, multipleload-bearing platforms capable of rising and falling, a lifting tower capable of rising and falling, a submarine cable reel rotation driving device used for driving towing wheels to rotate, a submarine cable bracket arranged on the upper portion of the lifting tower, a cable outlet traction machine used for dragging submarine cables, and a controller connected with the submarine cable reel rotation driving device and the cable outlet traction machine. The submarine cable reel rotation driving device and the load-bearing platforms are arranged under the submarine cable reel. The multiple load-bearing platforms and the submarine cable reel are arranged concentrically and circumferentially. According to the combined type submarine cable back twisting system, two manners of horizontal rotating back twisting and altitudinal back twisting can be achieved conveniently, the back twisting manners are switched conveniently, the different back twisting manners can be used according to the submarine cables of different sections, the operation is easy, and switching is convenient.

Description

technical field [0001] The invention relates to a submarine cable untwisting system, in particular to a combined submarine cable untwisting system used for untwisting submarine cables of various cross-sections. Background technique [0002] At present, after the completion of production and before laying construction, the submarine cable must be coiled in a circular submarine cable storage tray under the action of an external force in a manner similar to a steel wire rope. This winding method will have inherent damage to the armored submarine cable. Rotational stress, every time a coil is coiled, there will be an additional circular torsion, which requires a certain method to release the coiled circular stress one by one during the transfer and laying of the submarine cable, so as to prevent uneven or accumulated twisting. cause cable damage. [0003] At present, there are two main methods for submarine cable back twisting: [0004] high back twist [0005] Technical prin...

AI Technical Summary

Problems solved by technology

The disadvantage is that the construction cost is relatively high. Due to the huge gravity of the submarine cable storage tray, a large number of tugboats arranged along the rotating track at the bottom of the submarine cable are easy to be damaged and affect the service life of the system due to the load-bearing and rotating functions. The back-twisting method cannot realize the back-twisting of the large-section submarine cable

[0010] At present, the domestic submarine cable laying construction generally adopts a high-level back-twist method, but due to the rapid increase in domestic power supply demand and the needs of island smart grid construction, the voltage level continues to increase, and the cross-sectional area of ​​submarine cables continues to increase. At present, the transmission voltage of submarine cables The level can reach 500kV, and the cross-sectional area of ​​the submarine cable can reach 1800mm2. The traditional high-level untwisting method can no longer meet the untwisting requirements of high-voltage level and large-section submarine cables, so it is used for the combined type of untwisting submarine cables with various cross-sections. The construction of the submarine cable untwisting system is particularly important at this stage

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