Ultrahigh-voltage submarine cable flexible joint and manufacturing method thereof

Abstract

The invention discloses an ultrahigh-voltage submarine cable flexible joint. The flexible joint comprises a conductor welding segment, a conductor shielding recovery layer, an insulation recovery layer, an insulation shielding recovery layer, a metal sheath recovery layer and an outer sheath recovery layer. The conductor welding segment is arranged at the conductor end parts of the two sections ofsubmarine cables to connect the two sections of submarine cable conductors to form a flexible joint conductor part, the conductor shielding recovery layer, the insulation recovery layer, the insulation shielding recovery layer, the metal sheath recovery layer and the outer sheath recovery layer sequentially arranged on the outer side of the conductor part in a surrounding mode, and the conductorshielding recovery layer, and respectively correspond to the conductor shielding layers, the insulation layers, the insulation shielding layers, the metal sheaths and the outer sheaths of the two section of the cables to connect and form an integrated structure. The structural size of the flexible joint is close to that of a submarine cable body, the flexible joint has the same electrical performance, mechanical performance and bending performance as the submarine cable body, the service life of the flexible joint is prolonged, and meanwhile the manufacturing method of the flexible joint can be suitable for manufacturing molded line, compressed circle and split conductor submarine cable flexible joints.

Description

technical field [0001] The invention relates to the technical field of submarine cable manufacturing, in particular to an ultra-high voltage submarine cable soft joint and a manufacturing method thereof. Background technique [0002] Submarine cables are mainly used to transmit high-power electric energy underwater, which has the same function as underground power cables. The application environment is even harsher, and the difficulty of transportation and laying is far higher than that of other cable products. Therefore, submarine cables must be continuously manufactured in large lengths. . In the process of submarine cable production, in order to make the submarine cable a continuous line, each segment of the cable must be connected as a whole. The connection point of each segment of the cable is called the submarine cable flexible joint, also known as the factory joint. The structural size of the submarine cable flexible joint is close to that of the submarine cable body...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide an ultra-high voltage submarine cable flexible joint and its manufacturing method, aiming to solve the problem of performance differences between the existing flexible joint and the submarine cable body. The provided flexible joint production method is suitable for For the production of profiled wire, compressed circular and split conductor submarine cable flexible joints, the structural size of the obtained flexible joints is close to that of the submarine cable body, and has the same electrical properties, mechanical properties, bending properties and service life as the submarine cable body

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