CN203325511U - Crosslinking polyethylene-insulated power cable - Google Patents

Abstract

The utility model discloses a crosslinking polyethylene-insulated power cable. The crosslinking polyethylene-insulated power cable comprises a cable core; the gap of the cable core is provided with a filling layer; the cable core is wrapped by a first steel band armor layer and a second steel band armor layer; the outer most layer of the cable core is wrapped by an oversheath in an extruding manner; the cable core is formed by twisting three main wire cores each with a cross section of 4 mm<2> and an auxiliary wire core with a cross section of 1.5 mm<2>; the main wire cores and the auxiliary wire core are of the same structure; and the main wire cores and the auxiliary wire core are composed of conductors and non-linear insulating layers wrapped outside the conductors. The crosslinking polyethylene-insulated power cable improves the aging phenomenon of a crosslinking polyethylene-insulated layer, enhances the working stability and reliability of the crosslinking polyethylene-insulated power cable, and prolongs the service life of the cable.

Description

A kind of XLPE insulated power cable

technical field

The utility model relates to the field of wires and cables, in particular to a cross-linked polyethylene insulated power cable.

Background technique

XLPE insulated power cables are widely used in the field of high voltage and extra high voltage cables due to their good electrical properties, large transmission capacity, high drop or vertical laying, installation and maintenance. In the practical application of XLPE insulated power cables, it is easy to cause deterioration and destruction of the XLPE insulation layer due to aging and other reasons. A series of improvement measures have been adopted in the prior art, but the formation and development of electrical dendrite aging in the XLPE insulation layer cannot be completely eliminated; in the process of high-voltage and ultra-high-voltage transmission, due to the decline in insulation performance, the cable The safety hazard of breakdown. Therefore, how to improve the structure of XLPE insulated power cables in the prior art, so as to improve the damage caused by the aging of XLPE insulation layer to the power cables, and improve the working stability and reliability of XLPE insulated power cables Performance, improving the service life of the cable is a technical problem to be solved by those skilled in the art.

Utility model content

The technical problem to be solved by the utility model is to provide a cross-linked polyethylene insulated power cable, which improves the aging phenomenon of the cross-linked polyethylene insulating layer, improves the working stability and reliability of the cross-linked polyethylene insulated power cable, and improves the service life of the cable.

A cross-linked polyethylene insulated power cable described in the utility model includes a cable core, a filling layer is arranged in the gap of the cable core, an armor layer is wrapped around the cable core, and an outer sheath is extruded on the outermost layer of the cable core ; The cable core is formed by twisting three main wire cores with a cross section of 4mm ² and an auxiliary wire core with a cross section of 1.5mm ² , and the main wire core and the auxiliary wire core have the same structure.

As a further improvement, the main and auxiliary cores are composed of a conductor and a non-linear insulating layer extruded outside the conductor.

As a further improvement, the armor layer is composed of a first steel tape armor layer and a second steel tape armor layer.

The beneficial effects of the utility model are:

Compared with the prior art, the utility model adopts a non-core insulating layer and a double-layer armor structure. The non-linear insulating layer can improve the problem of high electric field concentration inside and on the surface, thereby suppressing the occurrence of electric branches in XLPE insulation. The formation and development have improved the aging phenomenon, improved the working stability and reliability of the XLPE insulated cable, and the double-layer armored structure has also improved the shielding of the cable, thereby increasing the service life of the cable.

Description of drawings

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

Detailed ways

As shown in Figure 1, a cross-linked polyethylene insulated power cable described in the utility model includes a cable core, a filling layer 1 is provided in the gap of the cable core, and the first copper tape armor layer is wrapped around the cable core 4. The second copper tape armor layer 5, the outermost layer of the cable core is extruded with an outer sheath 6; the cable core is stranded by three main wire cores with a cross section of ^4mm2 and an auxiliary wire core with a cross section of ^1.5mm2 It is formed, and its main core and auxiliary core have the same structure. The main and auxiliary wire cores are composed of a conductor 1 and a non-linear insulating layer 2 made of cross-linked polyethylene material extruded outside the conductor 1 .

There are many specific application ways of the utility model, and the above descriptions are only the preferred implementation modes of the utility model. Improvements, these improvements should also be regarded as the protection scope of the present utility model.

Claims (3)

1. a power cable with cross-linked polyethylene insulation, comprise cable core, it is characterized in that, is provided with packed layer (3) in the gap of cable core, the outer wrapped armour of cable core, and the cable core outermost layer extrudes oversheath (6); Described cable core is to be 4mm by three cross sections ²Master core and a cross section are 1.5mm ²Auxiliary core is stranded to be formed, and the structure of its master core and auxiliary core is identical.

2. power cable with cross-linked polyethylene insulation according to claim 1, is characterized in that, described main and auxiliary index contour core is by conductor (1) and be extruded in outer non-linear insulating layer (2) formation of conductor (1).

3. power cable with cross-linked polyethylene insulation according to claim 1, is characterized in that, described armour is combined by the first steel-tape armouring layer (4) and the second steel-tape armouring layer (5).

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