CN105702354A

CN105702354A - Composite insulated fire-proof cable

Info

Publication number: CN105702354A
Application number: CN201610170768.2A
Authority: CN
Inventors: 刘登瑞; 何宏亮; 卢鹏程; 肖剑鸣
Original assignee: ANHUI HUADIAN CABLE GROUP Co Ltd
Current assignee: ANHUI HUADIAN CABLE GROUP Co Ltd
Priority date: 2016-03-24
Filing date: 2016-03-24
Publication date: 2016-06-22

Abstract

The invention discloses a composite insulated fire-proof cable, which comprises wire cores and five coat layers, wherein the five coat layers wrap the outside of the wire cores and are a wire core wrapping tape, a ceramic polyolefin isolating layer, a mica wrapping tape layer, an aluminum alloy strip interlock armor layer and a sheath layer in sequence; the aluminum alloy strip interlock armor layer is coated with the sheath layer; the mica wrapping tape layer is arranged in the aluminum alloy strip interlock armor layer; the mica wrapping tape layer extrudes and wraps the ceramic polyolefin isolating layer; the wire core wrapping tape is arranged in the ceramic polyolefin isolating layer; the wire core wrapping tape evenly extrudes and wraps three groups of wire cores; each wire core comprises a copper conductor, a mica tape insulating layer and a cross-linked polyethylene insulating layer; and a filling layer is also arranged in a gap between the wire core wrapping tape and the wire cores. The composite insulated fire-proof cable provided by the invention can be continuously produced at a large length, and is convenient to install and lay and reliable in performance.

Description

A kind of compound insulation fireproof cable

Technical field

The invention belongs to field of cables, particularly relate to a kind of compound insulation fireproof cable。

Background technology

Along with expanding economy and growth in the living standard, fire-fighting system is more and more higher to the security requirement of cable。Fireproof cable product in the market mainly divides two big classes, one class is magnesium oxide insulated copper sheath mineral insulated cable, the insulant of this type of cable be magnesia powder easily in installing and using process the moisture absorption cause decreasing insulating, additionally this type of cable can not do multicore electric cable with large cross-section, production length is short, installation process center tap is many, manufactures mounting cost big。Another kind of is flexible mineral insulation cable, and this type of cable adopts mica tape insulation wrinkle copper sheath structure, and flexibility is soft relative to magnesium oxide insulating cable, if but there is also copper sheath defective time, this type of cable is easily intake, and causes operation dangerous, lays difficulty。

Summary of the invention

It is an object of the invention to provide one can produce continuously by long length, mounting and installation is convenient, a kind of compound insulation fireproof cable of dependable performance。

To achieve these goals, the present invention is achieved by the following technical solutions: a kind of compound insulation fireproof cable, and it includes wire core and five layers of jacket layer of parcel core；Described five layers of jacket layer are core band, ceramic polyolefin separators, mica wrapping tape layer, aluminum alloy strip lock armo layer and restrictive coating successively；Described restrictive coating internal cladding aluminum alloy strip lock armo layer；Inside described aluminum alloy strip lock armo layer, mica wrapping tape layer is set；Ceramic polyolefin separators is extruded inside described mica wrapping tape layer；It is provided with core band inside described ceramic polyolefin separators；Described core band inner homogeneous extrudes three groups of wire cores；Described wire core includes copper conductor, mica tape insulating barrier, crosslinked polyetylene insulated layer；Described copper conductor outer wrap mica tape insulating barrier；The outside wrapped crosslinked polyetylene insulated layer of described mica tape insulating barrier;Gap between described core band and wire core is additionally provided with packed layer。

Described mica tape insulating barrier is that three layers mica tape is put up wrapped, and the rate of putting up is not less than 30%。

The described crosslinked polyetylene insulated composite insulation layer constituting cable together with mica tape insulating barrier。

Described packed layer is alkali-free glass fibre yarn。

Described restrictive coating is low-smoke halogen-free polyolefin material。

The invention has the beneficial effects as follows in sum:

The present invention, by the redesign to the construction of cable, successfully solves fireproof cable and there are some problems in producing and installing and using, it is provided that one can produce by long length continuously, and mounting and installation is convenient, a kind of compound insulation fireproof cable of dependable performance。

Accompanying drawing explanation

Fig. 1 is cross-sectional structure schematic diagram of the present invention。

Detailed description of the invention

As it is shown in figure 1, a kind of compound insulation fireproof cable, it includes wire core and five layers of jacket layer of parcel core；Described five layers of jacket layer are core band 5, ceramic polyolefin separators 6, mica wrapping tape layer 7, aluminum alloy strip lock armo layer 8 and restrictive coating 9 successively；Described restrictive coating 9 internal cladding aluminum alloy strip lock armo layer 8；Described aluminum alloy strip lock armo layer 8 is internal arranges mica wrapping tape layer 7；Described mica wrapping tape layer 7 is internal extrudes ceramic polyolefin separators 6；Described ceramic polyolefin separators 6 is internal is provided with core band 5；Described core band 5 inner homogeneous extrudes three groups of wire cores；Described wire core includes copper conductor 1, mica tape insulating barrier 2, crosslinked polyetylene insulated layer 3；Described copper conductor 1 outer wrap mica tape insulating barrier 2；The outside wrapped crosslinked polyetylene insulated layer 3 of described mica tape insulating barrier 2;Gap between described core band 5 and wire core is additionally provided with packed layer 4。

Described mica tape insulating barrier 2 is put up wrapped for three layers mica tape, and the rate of putting up is not less than 30%。

Described crosslinked polyetylene insulated 3 constitute the composite insulation layer of cable together with mica tape insulating barrier 2。

Described packed layer 4 is alkali-free glass fibre yarn。

Described restrictive coating 9 is low-smoke halogen-free polyolefin material。

The mica tape insulating barrier 2 that cable of the present invention adopts is three layers Mica tape, and every layer of Mica tape rate of putting up is not less than 30%。Mica tape insulating barrier 2 provides the insulating properties in certain time when cable fire, it is ensured that cable is safe operation in case of fire。

Mica tape insulating barrier 2 is a kind of protection by the crosslinked polyetylene insulated layer 3 of cable of the present invention, it is prevented that mica tape insulating barrier 2 moisture absorption, under cable normal operation, by the insulating properties of mica tape insulating barrier 2 and crosslinked polyetylene insulated layer 3 shared cable。

The sealing coat ceramic polyolefin separators 6 of cable of the present invention, in cable fire process, this layer has in flame, nonflame situation at 300-2000 DEG C, do not melt, do not drip, do not fall off, adamantine ceramic supporting body can be burnt till, good fire insulation, effect of heat insulation can be played, do not fall out after spray, vibrations。

Sealing coat is played the effect of tightening when cable fire by the mica wrapping tape layer 7 of the present invention, is conducive to the ceramming process of sealing coat 6。

The aluminum alloy strip lock armo layer 8 of the present invention plays the effect of gear fire when cable fire, additionally in use cable core is played a protective role, it is prevented that damaged by rats and Coptotermes formosanus Shtrari. moth erosion。

The above is the embodiment of the present invention, therefore all equivalences done according to the structure described in the present patent application scope, feature and principle change or modify, and are all included within the scope of present patent application。

Claims

1. a compound insulation fireproof cable, it includes wire core and five layers of jacket layer of parcel core, it is characterised in that: described five layers of jacket layer are core band, ceramic polyolefin separators, mica wrapping tape layer, aluminum alloy strip lock armo layer and restrictive coating successively；Described restrictive coating internal cladding aluminum alloy strip lock armo layer；Inside described aluminum alloy strip lock armo layer, mica wrapping tape layer is set；Ceramic polyolefin separators is extruded inside described mica wrapping tape layer；It is provided with core band inside described ceramic polyolefin separators；Described core band inner homogeneous extrudes three groups of wire cores；Described wire core includes copper conductor, mica tape insulating barrier, crosslinked polyetylene insulated layer；Described copper conductor outer wrap mica tape insulating barrier；The outside wrapped crosslinked polyetylene insulated layer of described mica tape insulating barrier；Gap between described core band and wire core is additionally provided with packed layer。

2. a kind of compound insulation fireproof cable according to claim 1, it is characterised in that: described mica tape insulating barrier is that three layers mica tape is put up wrapped, and the rate of putting up is not less than 30%。

3. a kind of compound insulation fireproof cable according to claim 1, it is characterised in that: the described crosslinked polyetylene insulated composite insulation layer constituting cable together with mica tape insulating barrier。

4. a kind of compound insulation fireproof cable according to claim 1, it is characterised in that: described packed layer is alkali-free glass fibre yarn。

5. a kind of compound insulation fireproof cable according to claim 1, it is characterised in that: described restrictive coating is low-smoke halogen-free polyolefin material。