CN202694937U - Anti-drag type concentric conductor power cable - Google Patents

Abstract

The utility model discloses an anti-drag concentric conductor power cable, which comprises three inner conductors, two of which are respectively wrapped with an insulating layer on the outer side, and the three inner conductors are mutually twisted into bundles to form a cable core, and the outside of the cable core is wrapped in sequence There are tape layer, inner lining layer and concentric layer. In the concentric layer, there are several outer conductors concentric with the three inner conductors. Tensile cores are arranged in the gap between the adjacent outer conductors. The outside of the concentric layer is wrapped with high temperature resistant glass. The wrapping layer and the sheath layer formed by overlapping the fiber ribbons. The utility model has lower and uniform positive (reverse) sequence and zero sequence working impedance, which is beneficial to improve the quality of power supply; the tensile type and the (concentric conductor) outer conductor are arranged on the same layer, which is beneficial to improve the tensile strength and compact structure The reactance value of the outer conductor is low in the zero-sequence working state, which is conducive to the sensitive action of the short-circuit automatic protection device, thereby ensuring the safe operation of cable-related equipment; in addition, it has strong anti-electromagnetic interference and anti-lightning strike performance.

Description

A drag-resistant concentric conductor power cable

Technical field:

The utility model relates to the field of power cables, in particular to an anti-drag concentric conductor power cable.

Background technique:

Cables are used to transmit electric (magnetic) energy, information and wire products that realize electromagnetic energy conversion. It is usually a rope-like cable twisted by several or several groups of wires, at least two in each group. Each group of wires is insulated from each other, and is often twisted around a center, and the entire outer surface is covered with a high degree of insulation. layer. Wires and cables mainly include bare wires, electromagnetic wires and insulated wires for electrical appliances, power cables, communication cables and optical cables.

Many common three-core cables have poor usage characteristics, such as high and uneven positive (reverse) sequence and zero sequence working impedance, insensitive action of short-circuit automatic protection devices, and so on. For the actual working environment that cannot meet the work requirements; for the fire-resistant power cables with concentric conductors, the cables have low and uniform positive (reverse) sequence and zero-sequence working impedance, which is conducive to improving the quality of power supply; concentric layer conductors (inner lining layer and A circle of outer conductor between the wrapping layers) is much lower than the third core and four cores of ordinary three-core and four-core cables in the zero-sequence working state, which is conducive to the sensitive action of the short-circuit automatic protection device, thereby ensuring The safe operation of cable-related equipment; it has strong anti-electromagnetic interference and anti-lightning strike performance.

In addition, the anti-drag performance of the cable is poor, and the core is easily broken during the laying and installation process.

Utility model content:

The purpose of this utility model is to provide an anti-drag concentric conductor power cable, which is suitable for power transmission in power lines with a rated voltage of 0.6/1kv and below. And uniform positive (reverse) sequence and zero sequence working impedance, excellent anti-drag performance.

The technical scheme of the utility model is as follows:

An anti-drag power cable with concentric conductors, including three inner conductors, is characterized in that two of the three inner conductors are wrapped with an insulating layer on the outside, and the three inner conductors are twisted into bundles to form a cable core, and the outside of the cable core is wrapped in turn There are tape layer, inner lining layer and concentric layer. In the concentric layer, there are several outer conductors concentric with the three inner conductors. Tensile cores are arranged in the gap between adjacent outer conductors. The outside of the concentric layer is wrapped with high temperature resistant glass. The wrapping layer and the sheath layer formed by overlapping the fiber ribbons.

The anti-drag power cable with concentric conductors is characterized in that: the three inner conductors and outer conductors are made of alloy conductors.

The anti-drag power cable with concentric conductors is characterized in that: the insulation layer and the sheath layer are all made of polyvinyl chloride.

The utility model has the advantages of:

The utility model has lower and uniform positive (reverse) sequence and zero sequence working impedance, which is beneficial to improve the quality of power supply; the tensile type and the (concentric conductor) outer conductor are arranged on the same layer, which is beneficial to improve the tensile strength and compact structure The reactance value of the outer conductor in the zero-sequence working state is low, which is conducive to the sensitive action of the short-circuit automatic protection device, thereby ensuring the safe operation of cable-related equipment; in addition, it has strong anti-electromagnetic interference and anti-lightning strike performance.

Description of drawings:

Fig. 1 is the structural representation of the utility model.

Detailed ways:

See Figure 1:

The anti-drag concentric conductor power cable includes three inner conductors 1, two of which are wrapped with an insulating layer 2 on the outside, and the three inner conductors 1 are twisted into bundles to form a cable core, and the outside of the cable core is wrapped with tape in turn Layer 3, inner lining layer 4, concentric layer 5, several outer conductors 6 concentric with the three inner conductors are arranged in the concentric layer 5, and tensile cores 7 are arranged in the gap between adjacent outer conductors 6, and the outer conductors of the concentric layer 5 are It is wrapped with a wrapping layer 8 and a sheath layer 9 formed by overlapping wrapping of high-temperature-resistant glass fiber tapes.

The three inner conductors 1 and the outer conductor 6 adopt alloy conductors.

Both the insulation layer 2 and the sheath layer 9 are made of polyvinyl chloride.

Claims (3)

1. anti-type concentric-conductor power cable that pulls, comprise three inner wires, it is characterized in that: described three inner wires wherein two outsides are enclosed with respectively insulating barrier, three mutual stranded bunchys of inner wire consist of cable core, cable core is enclosed with belting layer, inner covering, concentric layer outward successively, be provided with several and three outer conductors that inner wire is concentric in the concentric layer, be provided with tensile core in the gap between outer conductor is adjacent, the concentric layer outside is enclosed with lapping layer, the restrictive coating of the overlapping wrapped formation of high temperature resistance glass fiber band.

2. according to claim 1 resisting pulls the type concentric-conductor power cable, it is characterized in that: described three inner wires, outer conductor adopt alloy conductor.

3. according to claim 1 resisting pulls the type concentric-conductor power cable, and it is characterized in that: it is polyvinyl chloride that described insulating barrier, restrictive coating all adopt material.

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