CN103886980A

CN103886980A - Flame-retardant cable

Info

Publication number: CN103886980A
Application number: CN201410070303.0A
Authority: CN
Inventors: 朱爱芜
Original assignee: Anhui Xingfu Electric Appliances & Cables Co Ltd
Current assignee: Anhui Xingfu Electric Appliances & Cables Co Ltd
Priority date: 2014-02-28
Filing date: 2014-02-28
Publication date: 2014-06-25

Abstract

The invention relates to a flame-retardant cable which comprises conductors and insulating layers. The insulating layers are wrapped outside the conductors to form wire cores. The space outside the wire cores and the space between the wire cores are filled with filling layers, and the filling layers and the wire cores are twisted to form a cable core; an inner protective sleeve is arranged outside the cable core in an extruded mode; a first flame-retardant layer, a first armor layer, a second flame-retardant layer, a second armor layer and an outer protective sleeve are sequentially wrapped outside the inner protective sleeve from inside to outside. The flame-retardant cable has the advantages of being reasonable in structural design, good in flame retardance and the like; arrangement is achieved according to an alternate structure, the first flame-retardant layer is protected by the first armor layer, the second flame-retardant layer is protected by the first armor layer and the second armor layer, and therefore the internal structure of the cable can be effectively prevented from damage in the actual transportation and cable erection process, the use performance of the first flame-retardant layer and the second flame-retardant layer is ensured, the flame retardance characteristic of the cable itself can be ensured, and the service life of the cable is prolonged.

Description

A kind of flame retardant type cable

Technical field

The present invention relates to a kind of cable, specifically a kind of flame retardant type cable.

Background technology

Flame retardant type power cable is for transmitting and distributes the cable of electric energy, be usually used in Urban Underground electrical network, power station lead line, industrial and mining enterprises in-line power and cross river, excessively extra large submarine transmission line.Flame retardant type power cable can be divided into oil-impregnated paper insulation power cable, plastic insulating power cable, rubber insulation power cable by insulating material.In can being divided into by electric pressure, lv power cable (35 kilovolts and following), high-tension cable (more than 110 kilovolts), extra-high-tension cable (275～800 kilovolts) and extra-high-tension cable (1000 kilovolts and more than).In addition, also can be divided into ac cable and direct current cables by electric current system.Because self structure design is unreasonable, at electric cable transporting, while setting up, very easily the epidermis to cable or internal structure cause damage, can reduce like this flame-retarding characteristic of flame retardant type cable, add cable and use aging after a period of time, fire resistance sharply declines, the serious useful life that has had influence on cable.

Summary of the invention

Technical problem to be solved by this invention be to provide a kind of reasonable in design, fire resistance is good, the cable that can extend self, i.e. a kind of flame retardant type cable in useful life.

Technical problem to be solved by this invention realizes by the following technical solutions:

A kind of flame retardant type cable, comprise conductor and insulating barrier, the outside that described insulating barrier is wrapped in conductor forms core, between the outside of described core and core and core, be enclosed with packed layer, described packed layer and the many stranded rear formation cable cores of core, the material of described packed layer is mineral wool, mineral wool is by melten glass fibrillatable, form the material of cotton shape, chemical composition belongs to category of glass, it is a kind of inorganic fibre, there is forming, bulk density is little, thermal conductivity Go-to-and-fro, insulation is adiabatic, sound absorption qualities is good, corrosion-resistant, stable chemical performance, adopt mineral wool in order to core is played to the effect of flameproof protection, the outside of described cable core is extruded with one deck inner sheath, the outside of described inner sheath is enclosed with flame-retardant layer, armour, No. two flame-retardant layers, No. two armours and oversheath successively according to order from the inside to the outside, utilize the structure of alternative expression to arrange, by an armour, a flame-retardant layer is protected, by an armour and No. two armours, No. two flame-retardant layers are protected, can effectively prevent like this in actual shipment, set up the process of cable in for the destruction of cable internal structure, guarantee the serviceability of a flame-retardant layer and No. two flame-retardant layers, thereby can guarantee the flame-retarding characteristic of cable self.

The material of a described flame-retardant layer is asbestos, has high-tensile, high flexible, chemically-resistant and thermal etching, electric insulation, thereby utilizes the protective effect that No. a flame-retardant layer plays fire-proof and thermal-insulation to inner sheath and cable core.

The material of No. two described flame-retardant layers is resurrection glass fibre, and the characteristic of resurrection glass fibre is as follows:

1) fire resistance is good: softening point approaches 1700 ℃, can under 900 ℃ of environment, use for a long time, the air-flow portion brush that moment can resistance to thousands of degree;

2) performance is comparatively stable: in organic and inorganic acid, (except hydrofluoric acid, phosphoric acid and hydrochloric acid) even at high temperature, and keeps good stable performance in weak base;

3) thermal shock and superelevation radiation are had to higher stability, good at high temperature and super-humid conditions insulation property, there is good bond performance with high-temp glue;

4) the resistance to solar radiation of moisture-proof and antidetonation, can be used for various encapsulants, and article construction is firm, under many hot conditionss, keeps flexibility;

5) structure and stable performance, be safe from harm to human body, can replace ceramic fibre and asbestos fibre (under high temperature, crystal transition occurring);

6) fire prevention temperature high, in gasoline burning be not oxidized, nondiscolouring, intensity is high, can not cause secondary pollution;

7) have good resistance to wear and insulation property, in most cases price has competitive advantage;

8) its skeleton can suitably be controlled, and makes various film parts, for liquid filtering, gas separation or the carrier as catalyst or enzyme.

Adopt No. two flame-retardant layers making of resurrection glass fibre can play to the material of cable inside the effect of fire-resisting protection, and resurrection glass fibre time affected by environment performance change less, stability is high, thereby has guaranteed the flame-retarding characteristic of No. two flame-retardant layers.

The invention has the beneficial effects as follows: the present invention has reasonable in design and the advantage such as fire resistance is good, utilize the structure of alternative expression to arrange, by an armour, a flame-retardant layer is protected, by an armour and No. two armours, No. two flame-retardant layers are protected, can effectively prevent like this in actual shipment, set up the process of cable in for the destruction of cable internal structure, guarantee the serviceability of a flame-retardant layer and No. two flame-retardant layers, thereby can guarantee the flame-retarding characteristic of cable self, extend the useful life of cable.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is internal structure schematic diagram of the present invention.

Embodiment

For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below the present invention is further set forth.

As shown in Figure 1, a kind of flame retardant type cable, comprise conductor 1 and insulating barrier 2, the outside that described insulating barrier 2 is wrapped in conductor 1 forms core, between the outside of described core and core and core, be enclosed with packed layer 3, described packed layer 3 and the many stranded rear formation cable cores of core, the material of described packed layer 3 is mineral wool, mineral wool is by melten glass fibrillatable, form the material of cotton shape, chemical composition belongs to category of glass, it is a kind of inorganic fibre, there is forming, bulk density is little, thermal conductivity Go-to-and-fro, insulation is adiabatic, sound absorption qualities is good, corrosion-resistant, stable chemical performance, adopt mineral wool in order to core is played to the effect of flameproof protection, the outside of described cable core is extruded with one deck inner sheath 4, the outside of described inner sheath 4 is enclosed with flame-retardant layer 5 No. one successively according to order from the inside to the outside, an armour 6, No. two flame-retardant layers 7, No. two armours 8 and oversheath 9, utilize the structure of alternative expression to arrange, by an armour 6, a flame-retardant layer 5 is protected, by an armour 6 and No. two armours 8, No. two flame-retardant layers 7 are protected, can effectively prevent in actual shipment like this, set up the destruction for cable internal structure in the process of cable, guarantee the serviceability of a flame-retardant layer 5 and No. two flame-retardant layers 7, thereby can guarantee the flame-retarding characteristic of cable self.

The material of a described flame-retardant layer 5 is asbestos, has high-tensile, high flexible, chemically-resistant and thermal etching, electric insulation, thereby utilizes the protective effect that No. a flame-retardant layer 5 plays fire-proof and thermal-insulation to inner sheath 4 and cable core.

The material of No. two described flame-retardant layers 7 is resurrection glass fibre, and the characteristic of resurrection glass fibre is as follows:

Adopt No. two flame-retardant layers 7 making of resurrection glass fibre can play to the material of cable inside the effect of fire-resisting protection, and resurrection glass fibre time affected by environment performance change less, stability is high, thereby has guaranteed the flame-retarding characteristic of No. two flame-retardant layers 7.

More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what in above-described embodiment and specification, describe is principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims

1. a flame retardant type cable, comprise conductor and insulating barrier, the outside that described insulating barrier is wrapped in conductor forms core, it is characterized in that: between the outside of described core and core and core, be enclosed with packed layer, described packed layer and the many stranded rear formation cable cores of core, the material of described packed layer is mineral wool; The outside of described cable core is extruded with one deck inner sheath; The outside of described inner sheath is enclosed with flame-retardant layer, armour, No. two flame-retardant layers, No. two armours and oversheath successively according to order from the inside to the outside.

2. a kind of flame retardant type cable according to claim 1, is characterized in that: the material of a described flame-retardant layer is asbestos.

3. a kind of flame retardant type cable according to claim 1, is characterized in that: the material of No. two described flame-retardant layers is resurrection glass fibre.