Safe cable

Abstract

The invention discloses a safe cable, and relates to the transmission field. The safe cable comprises an electric wire and an anti-expansion shell; the anti-expansion shell comprises a slowly changedlayer and an inner lamination layer; the inner lamination layer is an annular straight cylinder strip; filling cavities are formed in the inner lamination layer; each filling cavity comprises a connecting cavity and a gradually deep cavity; each connecting cavity is a concave groove with gradually deepened depth in the circumferential wall surface of the inner lamination layer; each gradually deepcavity is a rectangular groove which extends reversely in a direction perpendicular to the tail end side surface of the connecting cavity; the filling cavities are arranged in the axial direction ofthe inner lamination layer at intervals; and each slowly changed layer comprises an outer arc-shaped used for being laminated on the outer surface of the inner lamination layer, and an inserting partembedded in the corresponding filling cavity. The original shape of the cable can be still kept at constantly changed external temperatures, and contraction and expansion changes are avoided, so thatworking environment stability of the internal electric wire can be protected, and firmness of the whole cable structure is reinforced.

Description

technical field [0001] The invention relates to the field of transmission, in particular to a safety cable. technical background [0002] A cable is a wire made of one or more mutually insulated conductors and an outer insulating layer that transmits power or information from one place to another. The use of cables in real life can be seen everywhere, such as the transmission of power and data between heavy machinery, such as the interconnection between laptops and mobile phones. The use of cables can even be distributed in different spaces according to different fields of use. Some are installed in the open air or suspended from the ceiling, and some are placed on the floor surface and inside the wall. In many cases, the ambient temperature of the cable will not be constant, because the temperature difference will change between day and night or seasonal changes. When the working environment changes, the cable will change accordingly, the most obvious is that it will expan...

AI Technical Summary

Problems solved by technology

The use of cables in real life can be seen everywhere, such as the transmission of power and data between heavy machinery, such as the interconnection between laptops and mobile phones. The use of cables can even be distributed in different spaces according to different fields of use. Some are installed in the open air or suspended from the ceiling, and some are placed on the floor surface and inside the wall. In many cases, the ambient temperature of the cable will not be constant, because the temperature difference will change between day and night or seasonal changes. When the working environment changes, the cable will change accordingly, the most obvious is that it will expand and contract. However, the thermal expansion rate of the wire inside the cable is usually different from the protective layer wrapped, and the inner and outer parts of the cable will appear different over time. The situation of detachment will affect the long-term use of the cable

Images