CN202018849U

CN202018849U - Cable

Info

Publication number: CN202018849U
Application number: CN2011201061127U
Authority: CN
Inventors: 谢理波; 付晓单
Original assignee: TITION ELECTRIC WIRE GROUP CO Ltd
Current assignee: TITION ELECTRIC WIRE GROUP CO Ltd
Priority date: 2011-04-12
Filing date: 2011-04-12
Publication date: 2011-10-26
Anticipated expiration: 2021-04-12

Abstract

The utility model discloses a cable, which comprises conductor cores, a cross-linked polyethylene insulating layer wrapping the conductor cores, and a sheath layer wrapping the cross-linked polyethylene insulating layer. The cable disclosed by the utility model has the advantages that: since the cross-linked polyethylene insulating layer is also wrapped by the sheath layer, even if the cross-linked polyethylene insulating layer is plastified and softened when the cable is in a high-temperature environment, the cable cannot be bonded with other cables, and thereby the potential hazard of short-circuiting caused by cable bonding is eliminated.

Description

A kind of cable

Technical field

The utility model belongs to technical field of electric wires and cables, relates in particular to a kind of cable of anti-adhesion.

Background technology

Cable is extensively in the transmission course of electric power.The present construction of cable is enclosed with insulating barrier 2 in the periphery of conductor thread core 1 as shown in Figure 1, and insulating barrier more than 2 adopts PVC (polyvinyl chloride), silica gel, fluoroplastics or XLPE (crosslinked polyethylene).

The thermal endurance of PVC is relatively poor, and softening point is 80 ℃, begins to decompose variable color in 130 ℃, and separates out hydrogen chloride, and this causes the PVC cable can't be applied to the higher operational environment of temperature.The cost of silica gel cable and fluoroplastics cable is too high, and its production cycle is longer, can't generally use.

A large amount of uses is XLPE cable at present.Polyethylene is a kind of industrial chemicals of high-quality, by crosslinking with radiation, makes the polyethylene molecule become tridimensional network from two-dimensional structure, and the chemistry and the physical characteristic of material are enhanced accordingly, and the heat resisting and pressure resisting performance improves, and this material is crosslinked polyethylene.Crosslinking with radiation is with polyethylene products, as is coated on products such as pe sheath on the lead, film, light-wall pipe and shines crosslinked (cause the big molecule of polyethylene and produce free radical, form the C-C cross linked chain) with γ one ray, high-energy ray.The crosslinking degree of macromolecular chain is characterized by the degree of cross linking, degree of cross linking raying dosage and Temperature Influence, and crosslinking points increases with the increase of radiation dose, therefore by control radiation condition, the crosslinked polyethylene goods that can obtain to have certain degree of cross linking.

But, XLPE cable is in the crosslinking with radiation process, and polythene material can not carry out very crosslinked under γ one ray, high-energy ray irradiation, and promptly the degree of cross linking can't reach 100%, at high temperature (150C), the uncrosslinked part of XLPE insulated cable can plastify deliquescing again.When XLPE cable is applied to hot environment, when for example many XLPE cable being used as motor down-lead, if motor down-lead works long hours at 150 ℃ or in high temperature (150 ℃～180 ℃) dipping lacquer bake process, XLPE cable can be not enough because of the degree of cross linking, make uncrosslinked part plastify again and be bonded together, thereby cause short circuit hidden danger.

The utility model content

In view of this, the purpose of this utility model is to provide a kind of cable, and the construction of cable is improved, and when many cable application during in hot environment, can eliminate many cables the bonding hidden danger that cause short circuit take place.

For achieving the above object, the utility model provides following technical scheme:

A kind of cable comprises: conductor thread core; Wrap up crosslinked polyethylene (XLPE) insulating barrier of described conductor thread core; Wrap up the restrictive coating of described XLPE insulating barrier.

Preferably, in above-mentioned cable, described restrictive coating is a nylon layer.

Preferably, in above-mentioned cable, described restrictive coating is Kynoar (PVDF) film.

Preferably, in above-mentioned cable, the thickness of described PVDF film is 0.05 millimeter～0.15 millimeter.

Preferably, in above-mentioned cable, described conductor thread core is made up of many copper conductors or tin-coated copper conductor.

This shows, the beneficial effects of the utility model are: the disclosed cable of the utility model, the outside at crosslinked polyetylene insulated layer also is enclosed with restrictive coating, even if being in hot environment, cable cause crosslinked polyetylene insulated layer that plasticizing deliquescing phenomenon takes place, can be not bonding with other cables generations yet, eliminated because the hidden danger of cable adhesion detonator circuit short circuit.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structural representation of existing cable;

Fig. 2 is the structural representation of the disclosed a kind of cable of the utility model.

Embodiment

Explanation of nouns:

XLPE: crosslinked polyethylene;

PVDF: Kynoar.

The purpose of this utility model is to provide a kind of cable, by the construction of cable is improved, when many cable application during in hot environment, can eliminate many cables the bonding hidden danger that cause short circuit take place.

For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

Referring to Fig. 2, Fig. 2 is the structural representation of the disclosed a kind of cable of the utility model.

This cable comprises conductor thread core 1, XLPE insulating barrier 2 and restrictive coating 3.Wherein, conductor thread core 1 is made up of many copper conductors or tin-coated copper conductor, and XLPE insulating barrier 2 is wrapped in the outside of conductor thread core 1, and restrictive coating 3 is wrapped in the outside of XLPE insulating barrier.

Making by polythene material in the process of XLPE insulating barrier 2, the restriction of raying crosslinking process, the degree of cross linking of XLPE insulating barrier 2 can't reach 100%, and uncrosslinked part can the plasticizing deliquescing under the condition of high temperature.But in the disclosed construction of cable of the utility model, the outside of XLPE insulating barrier 2 further is provided with restrictive coating 3, even if plasticizing deliquescing phenomenon has taken place in uncrosslinked part in the XLPE insulating barrier 2, can be not bonding with other cables generations yet, eliminated because the hidden danger of cable adhesion detonator circuit short circuit.

In the enforcement, restrictive coating 3 can be selected nylon or PVDF for use.

PVDF is the white powder crystalline polymer.Its density is 1.75～1.78g/cm ³, vitrification point is-39 ℃, and brittle temperature is-62 ℃, and fusing point is 170 ℃, and heat decomposition temperature is more than 316 ℃, and long-term serviceability temperature is-40～150 ℃.PVDF can adopt the moulding of general thermoplastics processing method.Its outstanding feature is the mechanical strength height, and radioresistance is good, has good chemical stability, is not at room temperature corroded by acid, alkali, strong oxidizer and halogen.

Below to selecting for use the PVDF film to describe as the cable course of processing of restrictive coating.

At first a plurality of conductors are twisted into the conductor thread core 1 of regulatory specifications, extrude XLPE insulating barrier 2 in the outside of conductor thread core 1, and it is carried out irradiation operations, carry out extruding the second time operation afterwards, extrude the PVDF film in the outside of XLPE insulating barrier 2.

In the enforcement, the thickness of PVDF film is preferably 0.05 millimeter～0.15 millimeter.

Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.

To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims

1. a cable is characterized in that, comprising:

Conductor thread core;

Wrap up the crosslinked polyetylene insulated layer of XLPE of described conductor thread core;

Wrap up the restrictive coating of described XLPE insulating barrier.

2. cable according to claim 1 is characterized in that, described restrictive coating is a nylon layer.

3. cable according to claim 1 is characterized in that, described restrictive coating is the PVDF polyvinylidene difluoride film.

4. cable according to claim 3 is characterized in that, the thickness of described PVDF film is 0.05 millimeter～0.15 millimeter.

5. cable according to claim 1 is characterized in that, described conductor thread core is made up of many copper conductors or tin-coated copper conductor.