A degassing assembly line for electric cables

Abstract

The invention discloses a degassing assembly line for electric cable, comprising a vertical tower extruder and a degassing chamber, wherein, the vertical tower extruder and the degassing chamber are connected with each other through a cable insulation wire core; The cable insulation wire core is composed of a copper core stranded conductor and a shielding insulation layer, and the shielding insulation layer is wrapped on the outer wall of the copper core stranded conductor. A plurality of supporting rollers and the steering supporting rollers are arranged between the vertical tower extruder and the degassing chamber; A plurality of high-frequency heating coils are arranged between the two supporting rollers, the high-frequency heating coils are circular rings with openings at the bottom end, and the cable insulation wire core passes through the high-frequency heating coils. As that high-frequency heat coil heats the cable conductor in the production process of the insulated wire core,the degassing assembly line realizes the heating while producing the insulated wire core, achieves the on-line degassing effect, saves the degassing time, improves the production efficiency of the cable, and has better degassing effect.

Description

technical field [0001] The invention belongs to the field of power cables, and in particular relates to a degassing line for cables. Background technique [0002] With the rapid development of island development strategies and offshore renewable energy power generation, offshore wind power is expanding rapidly, and the demand for submarine high-voltage power cables is increasing. Domestic submarine cable manufacturers have obtained the performance of high-voltage 220kV AC submarine cable 30km without factory joints, and 500kV AC submarine cable 18km without factory joint performance. At present, the domestic large-length 500kV DC submarine cable is also in the research and development process, so the manufacture of large-length submarine cables is a submarine cable. The trend of development, while the traditional submarine cable degassing room uses heating air around the degassing room, but the effect is not ideal in the degassing process of long-length submarine cables. Es...

AI Technical Summary

Problems solved by technology

Domestic submarine cable manufacturers have obtained the performance of high-voltage 220kV AC submarine cable 30km without factory joints, and 500kV AC submarine cable 18km without factory joint performance. At present, the domestic large-length 500kV DC submarine cable is also in the research and development process, so the manufacture of large-length submarine cables is a submarine cable. The trend of development, while the traditional submarine cable degassing room uses heating air around the degassing room, but the effect is not ideal in the degassing process of long-length submarine cables

Especially for the degassing of DC cables, due to the current design of the degassing room, the heat conduction of the insulated core is conducted from the outer layer of the insulated core to the inner layer of the insulated core, and the temperature gradient will cause the space charge to move to the inner layer of the insulation. In the actual operation of the DC cable, due to the heating of the cable conductor, the heat conduction of the insulated core is conducted from the inner layer of the insulated core to the outer layer of the insulated core, resulting in the risk of reverse movement of space charges, so there is a potential for DC cables security risk

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