Processing method of power cable

Abstract

The invention discloses a power cable processing method which sequentially comprises the following steps: wire drawing, stranding, three-layer co-extrusion and crosslinking, copper strip shielding, cabling armoring and covering an oversheath; before the step of the three-layer co-extrusion and crosslinking and after the step of the copper strip shielding, the method further comprises a step of electrifying and degassing; the electrifying and degassing step means that the two ends of the cable are connected with a power source to form a closed loop, and the residual gas of the internal crosslinking by-product is removed after electrifying the cable for some time. The method of the invention electrifies and degasses the cable after the step of the three-layer co-extrusion and crosslinking; compared with most present degassing processes of drying rooms, the electrifying and degassing step of the invention greatly reduces the degassing time, and generally the degassing process can be finished in less than one day; the power cable processing method has the advantages that the degassing efficiency is high, the production efficiency of the whole cable processing is improved, the deliveryperiod is shortened, the energy source and the production space are economized, and the production benefit of enterprises is improved.

Description

【Technical field】 [0001] The invention relates to a processing method for power cables. 【Background technique】 [0002] Cables for transmission and distribution of electric energy are often used in urban underground power grids, outgoing lines of power stations, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. In power lines, the proportion of cables is gradually increasing. [0003] Power cables are generally buried in the soil or laid indoors, in trenches, and tunnels. The insulation distance between lines is small, no poles and towers are used, the land occupation is small, and the space on the ground is basically not occupied. It is less affected by climate conditions and surrounding environments, and the transmission performance is stable. , high reliability. Therefore, it is widely used in various industries. [0004] High-voltage XLPE cables will produce some by-products during the cross-linking p...

AI Technical Summary

Problems solved by technology

The degassing in the drying room shortens the degassing time to a certain extent. The cable with an insulating layer of 17mm needs to be placed in an environment of about 70°C for 8-9 days before it can be completely degassed; as the thickness of the insulating layer continues to increase, the The longer it takes for natural degassing or degassing in the drying room, the lower the production efficiency and the longer the product delivery time, which often delays the delivery time and affects the company's benefits

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