Cable jacket

Abstract

The invention relates to a cable sheath, which is wrapped in the outermost layer of the cable. The sheath includes a sheath body; the sheath body is composed of an inner insulating layer, a fireproof layer, a mesh layer, a shielding layer, and an outer insulating layer, and The thickness ratio of inner insulation layer, fireproof layer, mesh layer, shielding layer and outer insulation layer is 2~4:2~4:1:1~3:2~4; the inner wall of the inner insulation layer is convex along the length direction. At least three helical ribs are provided, and the at least three helical ribs are arranged in circles at intervals along the circumferential surface of the inner insulating layer. The cable sheath of the present invention is provided in multiple layers to have multiple characteristics at the same time. In addition, ribs are provided on the inner wall to increase the friction coefficient of the inner wall of the sheath, thereby effectively preventing relative sliding between the sheath and the inner core wire, and preventing the The influence of electrical temperature.

Description

technical field [0001] The invention belongs to the field of cables, and in particular relates to a cable sheath. Background technique [0002] As we all know, the cable outer insulation sheath is the outermost layer of the cable, such as polyvinyl chloride insulation sheath. In the prior art, most of the cable sheaths are composed of polyethylene insulation layer only, but this kind of sheath only has the protection of insulation, and does not have the characteristics of fire prevention and tensile resistance. In addition, the inner wall of the outer insulating sheath of the cable in the prior art is relatively smooth, so that the internal cable data wires are easy to slide in the sheath, thereby making the electrical performance of the cable unstable. [0003] Therefore, proposing a cable sheath is the research subject of the present invention. Contents of the invention [0004] In order to solve the problem in the prior art that the performance of the outer insulating...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that the performance of the outer insulating sheath is single and the inner wall of the outer insulating sheath is too slippery, which leads to the easy sliding of the inner cable data line in the sheath and the unstable electrical performance of the cable, a cable sheath is provided. , wrapped in the outermost layer of the cable, the sheath includes a sheath body;

Images