A kind of preparation technology of power cable for city building

Abstract

The invention discloses a preparation process of a power cable for urban buildings. The preparation process specifically includes the steps of carrying out wire drawing, stranding conductors, extruding an insulating layer, extruding an inner sheath, wrapping a shielding layer, braiding an armor layer, extruding an outer sheath, carrying out finished product inspection and obtaining a finished product. The shielding layer is formed by wrapping an aluminum-plastic composite tape on a wrapping machine or a cable forming machine, the outer layer of the inner sheath is provided with the aluminum-plastic shielding and the armor layer to form a combined shielding layer, so that the transmission impedance of the power cable is enabled not to be greater than 1 omega / m when the shielding transfer impedance of the finished power cable is reduced to 100MHz or below, thereby ensuring the finished power cable to have good shielding performance, enabling the power cable not to cause interference to adjacent circuits when being electrified and used, and thus increasing the stability of the finished power cable in use.

Description

technical field [0001] The invention belongs to the field of power cable production, and more specifically relates to a preparation process of power cables for urban construction. Background technique [0002] With the development of urban buildings, a large number of electrical equipment such as power distribution systems, control systems, and signal systems that need to be installed in urban buildings need to be implemented using special power cables, which requires that the preparation of power cables for urban buildings requires Both the preparation quality and the preparation efficiency of the power cable are taken into consideration. [0003] The existing power cables for urban buildings generally have a fixed wire drawing size during the wire drawing process, which cannot be adjusted according to actual requirements, and in the wire drawing process, the traditional wire drawing machine is easy to draw the conductor The tension force adjustment is too tight or the ten...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation process of power cables for urban construction, mainly to solve the problem that when the wire drawing process is performed, the size of the general wire drawing is fixed and cannot be adjusted according to actual requirements, and in the wire drawing process, the traditional When the wire drawing machine is drawing, it is easy to adjust the tension force of the conductor too tight or the tension force is insufficient, so that the wire drawing size of the conductor is different during wire drawing, and it is easy to cause the conductor to be broken or fall off. The wire drawing process cannot be completed smoothly, which affects the wire drawing efficiency, thereby affecting the technical problems of the finished product success rate and product efficiency of the entire power cable

Images