CN206098020U - Double -deck insulating fire resisting cable - Google Patents

Abstract

The utility model relates to a double -deck insulating fire resisting cable, include: the cable package twines layer and quilt the cable package twines the several wire core of layer parcel, the sinle silk wraps up the layer including the sinle silk of middle copper conductor and parcel copper conductor, and sinle silk parcel layer is in including wrapping up in proper order outer the inner insulating layer, external insulation layer and the fire -resistant area of copper conductor, the cable package twines the layer and includes fire -retardant layer, fire -resistant area and the fire -retardant sheath of low smoke and zero halogen from inside to outside in proper order, winding direction that the cable package twined intraformational fire -resistant area with the sinle silk package twines the winding opposite direction in intraformational fire -resistant area. The utility model discloses a bilayer is crowded technology and radiation cross -linking technique altogether to in the fire prevention technique that the sinle silk package twined the insulating plus flame retardant coating in layer, the insulating fire -retardant fire resisting cable of double -deck low smoke and zero halogen of preparation not only satisfies power transfer's safe handling, possesses low cigarette in addition, has steamed environmental protection, fire -retardant, fire -resistant, ageing resistance, the high insulating and good high -lighting ability of mechanical properties.

Description

A kind of double hyer insulation fire-resisting cable

Technical field

This utility model belongs to electric wire production technical field, and in particular to a kind of double-layer coextrusion insulated flame-retardant electricity Cable.

Background technology

Electric wire is national economy indispensable " blood vessel and nerve ", with social and economic development, is especially existed The occasion such as indoor, heavy construction inside and large-scale public place, the safe and environment-friendly and flame-retardant performance requirement to electric wire More and more higher.At present on the market electric wire is mainly divided to polyvinyl chloride insulation and low smoke and zero halogen two classes of insulation, BLV Although having excellent mechanical, electrically and processing characteristics and at home maturation has been used, because environmental-protecting performance is low, contain Halogen and a large amount of poisonous and hazardous corrosive gas and dense smoke are discharged when burning, and temperature resistant grade is low, easily causes " secondary Disaster ", service life is short.

Low smoke and zero halogen insulant, it has good electrical property and processing characteristics, is widely used as electric wire Insulation and sheath material, but the easy moisture absorption during low smoke and zero halogen materials'use, limit service life, bury in use Lower potential safety hazard.

The content of the invention

This utility model overcomes the deficiencies in the prior art, there is provided a kind of a kind of double hyer insulation flame proof electrical of simple structure Cable.

To reach above-mentioned purpose, the technical solution adopted in the utility model is：A kind of double hyer insulation fire-resisting cable, including： Cable looping layer, and the several wire core wrapped up by the cable looping layer, the core includes middle copper conductor and parcel The core integument of copper conductor, it is characterised in that the core integument is interior exhausted outside the copper conductor including being wrapped in successively Edge layer, external insulation layer and fire resistant belt；The cable looping layer includes successively from inside to outside the resistance of flame-retardant layer, fire resistant belt and low smoke and zero halogen Combustion sheath；The winding direction of the fire resistant belt in the winding direction of the fire resistant belt in the cable looping layer and the core looping layer On the contrary.

In one preferred embodiment of this utility model, the fire resistant belt is Muscovitum fire resistant belt made by Muscovitum material.

In one preferred embodiment of this utility model, the inner insulating layer and the external insulation layer adopt linear poly- second Alkene forms three-dimensional lattice structure through cross-linking radiation.

In one preferred embodiment of this utility model, fire resistant belt described in low-smoke halogen-free flame-retardant sheath inwall tightly banding.

In one preferred embodiment of this utility model, some core windings twist with the fingers knot together.

In one preferred embodiment of this utility model, the core is seven.

In one preferred embodiment of this utility model, the inner insulating layer and the external insulation layer using double-layer coextrusion side Method is coated on the copper conductor periphery.

This utility model solves defect present in background technology, and this utility model possesses following beneficial effect：This reality With new employing double-layer coextrusion technique and irradiation crosslinking technological, and the fireproofing technique of the additional flame retardant coating that insulate in core looping layer, The double-deck low smoke and zero halogen flame-resistant insulation fire-resisting cable of preparation not only meets the safe handling of electric energy transmission, and possesses low cigarette, nothing Halogen is environmentally friendly, fire-retardant, fire resisting, aging resistance, the outstanding properties of high insulation and good mechanical performance.

Description of the drawings

This utility model is further illustrated with reference to the accompanying drawings and examples；

Fig. 1 is the structural representation of preferred embodiment of the present utility model；

In figure：1st, cable, 2, core, 3, copper conductor, 4, inner insulating layer, 5, external insulation layer, 6, fire resistant belt, 7, flame-retardant layer, 8th, low-smoke halogen-free flame-retardant sheath.

Specific embodiment

This utility model is described in further detail presently in connection with drawings and Examples, these accompanying drawings are simplified Schematic diagram, only illustrates in a schematic way basic structure of the present utility model, therefore it only shows the structure relevant with this utility model Into.

As shown in figure 1, a kind of double hyer insulation fire-resisting cable, including：Cable looping layer, and if by cable looping layer parcel Dry root core 2, core 2 includes the core integument of middle copper conductor 3 and parcel copper conductor 3, and core integument is included successively It is wrapped in inner insulating layer 4 outside copper conductor 3, external insulation layer 5 and fire resistant belt 6；Cable looping layer includes successively from inside to outside fire-retardant Layer 7, fire resistant belt 6 and low-smoke halogen-free flame-retardant sheath 8；In the winding direction and core looping layer of the fire resistant belt 6 in cable looping layer Fire resistant belt 6 winding direction it is contrary.

Fire resistant belt 6 is Muscovitum fire resistant belt made by Muscovitum material.

Inner insulating layer 4 and external insulation layer 5 form three-dimensional lattice structure using linear polyethylene through cross-linking radiation.

Low-smoke halogen-free flame-retardant sheath inwall tightly banding fire resistant belt 6.

Core 2 is seven, and the winding of several wire core 2 twists with the fingers knot together.

Inner insulating layer 4 and external insulation layer 5 are coated on the periphery of copper conductor 3 using the method for double-layer coextrusion.

Using double hyer insulation coextruding method, in copper conductor 3 outer cladding inner insulating layer 4 and external insulation layer 5 successively, two-layer is set to insulate Layer is changed into an entirety, and to insulating barrier irradiation is integrally carried out, and makes the insulating barrier of two-layer linear structure, becomes the netted knot of 3 D stereo Structure.The wrapped of fire resistant belt 6 is carried out outside insulation, after preventing the high temperature of flame from will insulate and melt, copper conductor 3 can it is exposed Outer the occurrence of.After core 2 is made, stranding is carried out to core, cable 1 packs one layer some outsides of cable core 2 after stranding Flame-retardant layer 7, then reverse wrapped one layer of fire resistant belt 6 again finally again packs the material of low-smoke halogen-free flame-retardant sheath 8 on cable core 2.

Irradiated crosslinking low-smoke and halogen-free flame retardant cable, the high energy electron line produced using electron accelerator carries out spoke to cable According to crosslinking, the insulating barrier for making cable is changed into 3 D stereo network structure, defines three less than hydrone from linear molecular structure Dimension lattice, in polyethylene surface and is internally formed compacted zone, so as to effectively prevent the combination of hydroxide and hydrone, this Plant crosslinking method and not only increase the heatproof of electric wire, wear-resisting and fire resistance, more importantly serve resistance effect.This Crosslinking method can make polyethylene crosslinking without high temperature, anhydrous, and the fire-retardant and electric property of cable can be improved again.There is cable The features such as low cigarette, Halogen, fire-retardant, fire resisting and high temperature resistant.

It is above enlightenment according to desirable embodiment of the present utility model, by above-mentioned description, related personnel is complete Various change and modification can be carried out in the range of without departing from this utility model technological thought.This utility model The technical scope content that is not limited in description, it is necessary to technical scope is determined according to right.

Claims (7)

1. a kind of double hyer insulation fire-resisting cable, including：Cable looping layer, and the several wire wrapped up by the cable looping layer Core, the core includes the core integument of middle copper conductor and parcel copper conductor, it is characterised in that the core integument Including the inner insulating layer, external insulation layer and fire resistant belt that are wrapped in successively outside the copper conductor；The cable looping layer is from inside to outside Include flame-retardant layer, fire resistant belt and low-smoke halogen-free flame-retardant sheath successively；The winding direction of the fire resistant belt in the cable looping layer with The winding direction of the fire resistant belt in the core looping layer is contrary.

2. a kind of double hyer insulation fire-resisting cable according to claim 1, it is characterised in that：The fire resistant belt is Muscovitum material Made by Muscovitum fire resistant belt.

3. a kind of double hyer insulation fire-resisting cable according to claim 1, it is characterised in that：The inner insulating layer and described outer Insulating barrier forms three-dimensional lattice structure using linear polyethylene through cross-linking radiation.

4. a kind of double hyer insulation fire-resisting cable according to claim 1, it is characterised in that：Low-smoke halogen-free flame-retardant sheath inwall Tightly fire resistant belt described in banding.

5. a kind of double hyer insulation fire-resisting cable according to claim 1, it is characterised in that：The some core windings are twisted with the fingers Knot is together.

6. a kind of double hyer insulation fire-resisting cable according to claim 1, it is characterised in that：The core is seven.

7. a kind of double hyer insulation fire-resisting cable according to claim 1, it is characterised in that：The inner insulating layer and described outer Insulating barrier is coated on the copper conductor periphery using the method for double-layer coextrusion.