Directly-buried semi-armored cable

Abstract

The invention discloses a directly-buried semi-armored cable, which comprises a cable outer cover layer and an inner core wire arranged in the cable outer cover layer. The cable outer cover layer hasan installation chamber in which the inner core wire is installed. The outside of the inner core wire is coated with an expansion layer. The cable outer cover layer is bent to form more than one support section extending inward. The support sections are arranged in a circle around the cable outer cover layer, and the inner ends of the support sections are in contact with and support the outer wallof the expansion layer. Clamp openings are formed between the support sections. More than one positioning through hole is opened equidistantly on both sides of the inner walls of the clamp openings along the lengthwise direction of the cable outer cover layer. The cable of the invention adopts a semi-armored design, which can save a lot of metal materials and achieve very good protection performance. The whole cable can be expanded after resisting enough pressure, and the inner core wire can be protected by the expansion layer. The directly-buried semi-armored cable is especially suitable forthe field of directly-buried installation.

Description

technical field [0001] The invention relates to a cable, in particular to a direct-buried semi-armoured cable. Background technique [0002] Generally, armored cables are used for direct buried cables, and the outer armor layer is used to protect the inner core wires. However, if the structural strength of the armor layer is to be high, a large amount of metal materials must be filled in the armor layer. It can ensure the strength to meet the direct buried installation environment, and the price is more expensive than ordinary cables. The direct-buried cables are easily sheared and squeezed by the outside under the ground, causing the cables to be damaged and causing serious economic losses. However, despite the armored layer, its shear resistance is not enough. For external shearing, the external force directly acts on the armored layer, and the inner core wire inside the armored layer will also be directly sheared. Since there is no buffer capacity, Therefore, the protec...

AI Technical Summary

Problems solved by technology

[0002] Generally, armored cables are used for direct buried cables, and the outer armor layer is used to protect the inner core wires. However, if the structural strength of the armor layer is to be high, a large amount of metal materials must be filled in the armor layer. It can ensure the strength to meet the direct buried installation environment, and the price is more expensive than ordinary cables

The direct-buried cables are easily sheared and squeezed by the outside world, causing the cables to be damaged and causing serious economic losses.

However, despite the armored layer, its shear resistance is not enough. For external shearing, the external force directly acts on the armored layer, and the inner core wire inside the armored layer will also be directly sheared. Since there is no buffer capacity, Therefore, the protection ability is still poor

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