Anti-torsion cable with fireproof function

Abstract

The invention discloses an anti-torsion cable with fireproof function, comprising an outer sheath (1), an inner sheath (3) arranged in the outer sheath (1), a plurality of cable sheaths (4) arranged in the inner sheath (3) and a cable core (5) arranged in the cable sheaths (4); the inner surface of the outer sheath (1) is provided with a plurality of grooves A, the outer surface of the inner sheath (3) is provided with a plurality of grooves B that are in one-to-one correspondence with the grooves A, the grooves A and the grooves B cooperate to form cavities, a stiffener (2) is mounted in each cavity, and a fireproof layer (6) is provided outside the outer sheath (1). The anti-torsion cable has the advantages that relative rotation between the outer sheath and the inner sheath can be prevented by using the stiffeners so as to improve torsion strength and avoid abrasions between the inner sheath and the outer sheath, the stiffeners can be arranged to provide enhanced mechanical strength for the cable, and the fireproof layer can be arranged to impart good thermal insulation and fireproof property to the cable.

Description

technical field [0001] The invention relates to the field of cables, in particular to a torsion-resistant cable with a fireproof function. Background technique [0002] With the rapid development of electronic communication technology, the requirements for spring telephone cables for various electronic communication systems are getting higher and higher. Not only must they have high elasticity, high wear resistance and softness, but they should also be miniaturized and lightweight. , Anti-interference characteristics. The currently used telephone cables have four cores insulated and extruded elastomeric sheaths; there are also two pairs of conductors twisted after insulation and then extruded elastomeric sheaths. The above two structures can meet the requirements of high elasticity and high wear resistance when the material is suitable, but they cannot resist the interference of external electromagnetic waves, and there is mutual interference between the two pairs. In orde...

AI Technical Summary

Problems solved by technology

The above two structures can meet the requirements of high elasticity and high wear resistance under the condition of suitable materials, but they cannot resist the interference of external electromagnetic waves, and there is mutual interference between the two pairs

In order to prevent interference, some cables have been adjusted in structure. After the insulating core is cabled, the shield is woven, and finally the elastomer sheath is extruded. This structure not only has a large overall size, but the interference between the core pairs still exists. Some cable pairs Each pair weaves split screens, and then weaves the total screen after the split screens. Although this structure can resist external electromagnetic wave interference and eliminate the mutual interference between each pair, it has a large structure size, heavy weight, poor elasticity and bendability. Unsuitable for laying in narrow spaces

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