CN203134442U

CN203134442U - Anti-aging low-voltage power cable used for rail transit

Info

Publication number: CN203134442U
Application number: CN201320078002.3U
Authority: CN
Inventors: 俞国平; 薛元洪; 李志强; 史界红; 章迁平; 刘�文; 曹勇利; 储贤民
Original assignee: JIANGSU NEW REMOTE CABLE CO Ltd
Current assignee: Ruikang Wenyuan Cable Co ltd
Priority date: 2013-02-20
Filing date: 2013-02-20
Publication date: 2013-08-14
Anticipated expiration: 2023-02-20

Abstract

The utility model discloses an anti-aging low-voltage power cable used for rail transit. The anti-aging low-voltage power cable used for rail transit includes a cable core. The cable core is formed by twisting a plurality of insulating wire cores together. A belting layer is coated outside the cable core. An inner liner layer and an armor layer are wrapped outside the belting layer successively through in an extruded manner. An outer sheath is wrapped on the outermost layer of the anti-aging low-voltage power cable used for rail transit in an extruded manner. The insulating wire cores are in the shape of sheets and blocks and are composed of conductors and insulating layers wrapped outside the conductors in an extruded manner. By using the anti-aging low-voltage power cable used for rail transit provided by the utility model, problems of cable breakdown, insulating resistance decrease and the like caused by water tree aging and insulation aging caused by dampness penetration in practical production, laying and operation are solved, so that the security is guaranteed and the anti-aging low-voltage power cable used for rail transit has characteristics that the anti-aging low-voltage power cable used for rail transit is anti-aging and is high in carrying capacity, long in service lifetime and the like.

Description

A kind of anti-aging track traffic lv power cable

Technical field

The utility model relates to the electric wire field, specifically refers to a kind of anti-aging track traffic lv power cable.

Background technology

Along with fast development of national economy, all trades and professions also sharply increase the demand of cable.Particularly in recent years, along with the develop rapidly of track traffic, the demand of track traffic with lv power cable also constantly increased.The weak point that present lv power cable exists is, adopts organosilane crosslinked polyethylene as main insulation material mostly, in actual production with lay when moving, it is aging water tree to occur, insulation is made moist aging, thereby causes cable breakdown, degradation phenomenon under the insulation resistance; In addition, this kind insulation material to reach crosslinked performance must be by satisfying performance requirement through a few hours in the environment of high-temperature water or steam.While technology is loaded down with trivial details, water easily is penetrated in the insulation, causes potential safety hazard, can not satisfy the demand that lv power cable is used in current track traffic.

The utility model content

Technical problem to be solved in the utility model provide a kind of anti-aging, ampacity is high, the track traffic lv power cable of long service life.

A kind of anti-aging track traffic lv power cable described in the utility model, comprise cable core, its cable core coats belting layer by stranded the forming of some eradication edge cores outside cable core, belting layer extrudes inner covering, armour outward successively, extrudes oversheath at the cable outermost layer.

Further improve, described insulated wire cores is the sheet bulk, is by conductor and is extruded in the outer insulating barrier of conductor and constitutes.

Further improve, described armour adopts the clad steel band gap to put up wrapped structure.

Further improve, described insulating barrier through UV-irradiation, reaches three-dimensional netted cross-linked polyolefin molecular structure by extrusion molten again.

The beneficial effects of the utility model:

1, the utility model adopts irradiation ultraviolet light cross-linking insulating material of polyethylene, by extrusion molten, through UV-irradiation, reaches three-dimensional netted cross-linked polyolefin molecular structure.

2, the insulated wire cores processing technology is simple in the utility model, need not by warm water crosslinking, does not have micro-moisture in the material, can directly enter next procedure after machining.

3, inner covering of the present utility model adopts halogen-free low-smoke flame retardant material to constitute, and is applicable to crowded places such as city underground, track traffic.

4, to take the clad steel band gap to put up wrapped for the utility model, constitutes the armature of cable layer, prevents extraneous mechanical damage, improves the useful life of cable.

5, the utility model adopts anti-cracking low-smoke halogen-free polyolefin sheath, has solved the halogen-free flameproof sheath problem of cracking easily.

Description of drawings

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

Embodiment

As shown in Figure 1, a kind of anti-aging track traffic lv power cable described in the utility model, comprise cable core, its cable core is by stranded the forming of some eradication edge cores, insulated wire cores is by conductor 1 and adopt the insulating barrier 2 of irradiation ultraviolet light cross-linking insulating material of polyethylene to constitute, its insulating barrier 2 through UV-irradiation, reaches three-dimensional netted cross-linked polyolefin molecular structure by extrusion molten.Outside cable core, coat and adopt halogen-free flameproof band belting layer 3, extrude the inner covering 4 that adopts halogen-free low-smoke flame retardant material outside belting layer 3, inner covering 4 outer being provided with adopt the clad steel band gap to put up the steel-tape armouring layer 5 of wrapped structure, extrude at the cable outermost layer and adopt the oversheath 6 of preventing the cracking low-smoke halogen-free polyolefin.

The utility model provides thinking and the implementation method of a kind of anti-aging track traffic with lv power cable; concrete application approach is a lot; the above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvement, these improvement also should be considered as protection range of the present utility model.

Claims

1. A low-voltage power cable for anti-aging rail transit, including a cable core, characterized in that: the cable core is formed by twisting several insulated wire cores, and the cable core is covered with a tape layer (3). The inner liner (4) and the armor layer (5) are sequentially extruded on the outside of the layer (3), and the outer sheath (6) is extruded on the outermost layer of the cable.

2. The anti-aging low-voltage power cable for rail transit according to claim 1, characterized in that, the insulated wire core is in the shape of a block, and is composed of the conductor (1) and the insulation extruded outside the conductor (1). Layer (2) constitutes.

3. The anti-aging low-voltage power cable for rail transit according to claim 1, characterized in that, the armor layer (5) adopts a double-layer steel tape gap covering and wrapping structure.

4. The anti-aging low-voltage power cable for rail transit according to claim 2, characterized in that the insulating layer (2) is melted by extrusion and irradiated by ultraviolet light to form a three-dimensional network of cross-linked polyolefin molecules structure.