CN201868147U

CN201868147U - Fireproofing communication cable

Info

Publication number: CN201868147U
Application number: CN2010206369731U
Authority: CN
Inventors: 丁振生
Original assignee: QINGDAO HANHE CABLE CO Ltd
Current assignee: QINGDAO HANHE CABLE CO Ltd
Priority date: 2010-12-01
Filing date: 2010-12-01
Publication date: 2011-06-15
Anticipated expiration: 2020-12-01

Abstract

The utility model relates to a cable, in particular to a fireproofing cable which is applicable to communication lines of important inflammable and explosive places, and particularly applicable to instrument control cables used in a nuclear island. The fireproofing communication cable comprises an inner conductor and an outer conductor wrapped outside the inner conductor, and a support piece layer and a lapping insulating layer are sequentially wrapped from inside to outside between the inner conductor and the outer conductor; and a metal protecting layer is wrapped outside the outer conductor. The cable has novel structure, cost greatly lower than that of silicon dioxide cable, and no pollution, and is corrosion resisting and especially applicable to instrument control cables in a nuclear island.

Description

The fire-type telecommunication cable

Technical field

The utility model relates to a kind of cable, relates in particular to a kind of fireproof cable that is applicable to the communication line use in inflammable and explosive important place, is specially adapted to the instrument electric control cable that uses in the nuclear island.

Background technology

Continuous development along with the comprehensive wiring industry, especially the rise of data center, people more and more pay attention to data safety, cable is as the highway of message transmission, it just becomes the popular domain of various countries engineer research naturally for the resistance ability of sudden disaster in the middle of transmission course, also just become the most important thing as the fire prevention first of the comprehensive wiring " three is anti-".If who wants accomplish something in the security cable field, it becomes the person of holding the plate on which lie the ears of sacrificial bull of the research aspect the cable fire prevention so, also just becomes inevitable.The most valuable in Network Transmission is the information rather than the network equipment.Information is non-renewable, do not had forever in case just lost also, so people comes backup information by various means by fair means or foul, comes the transmission data by stable network, and they are placed in safe place.People turn to comprehensive wiring system gradually and resist outside invasion and attack and avoid the externally direction of harm, and therefore, the cable fire prevention just becomes its most important thing.

Present stage is used wider fire prevention cable and mainly contains UL fire-retardant cable and flame-retardant low-smoke halogen-free cable two big classes.In imported product, mainly come from America and Europe, because the fireproof cable standard in America and Europe is incompatible, the fire prevention thinking is very different, therefore, Party A and designing institute all are in passive state when selecting product, each have their own reason is selected according to the actual conditions of fund at last often.Though these two kinds of cables can delay flame combustion and reduce the generation of cigarette poison under fire condition, can not guarantee that data can have time enough to transfer to safe place in the scene of a fire.

In nuclear power plant, the synthetic rubber of vinyl, acrylic is used in instrument control loop usually, glass fibre, and be the cable of insulating material with chlorosulfonated polyethylene, poly-ethyleneimine etc.The inner instrument electric control cable of containment is placed under the different environments for use, most important influencing factor is a natural environment, it mainly is the influence of temperature when having oxygen to exist, humidity, nuclear radiation, polymeric materials such as the insulation of cable and sheath As time goes on can take place various slowly, irreversible chemical change and physical change, make the organic plastics cable aging gradually even phenomenon such as embrittlement cracking occurs in whole use, this just causes huge threat to the security performance of nuclear power station.Though at present emerging silicon dioxide cable takes advantage in nuclear island, its manufacturing process is extremely strict, cost is expensive, and its technical resource is subjected to external monopolization, has become a bottleneck of constraint China nuclear industry development.

The utility model content

Technique effect of the present utility model can overcome above-mentioned defective, and a kind of fire-type telecommunication cable is provided, and it is simple in structure, and processing technology is simple, and fire protecting performance is good.

For achieving the above object, the utility model adopts following technical scheme: it comprises inner wire and at the peripheral outer conductor that wraps up of inner wire, wraps up strutting piece layer, lapped insulation layer between inner wire and the outer conductor from inside to outside successively; Outer conductor coats coat of metal outward.

Wrap up one deck strutting piece layer, one deck lapped insulation layer between lapped insulation layer and the outer conductor successively.Promptly can adopt two-layer strutting piece layer, two-layer lapped insulation layer.

The lapped insulation layer adopts inorganic mica, ceramic band and Fiber glass rod composite construction.Requirement according to line impedance, insulating barrier adopts inorganic mica, ceramic band and Fiber glass rod (FRP) composite construction, strutting piece braiding in the strutting piece layer or wrapped outside inner wire or in the insulating barrier, strutting piece and inorganic band form netted or vertical cellular type structure, wherein the dielectric constant of inorganic band is low as far as possible, is generally less than 5; Adopt structure in the other direction when the adjacent two layers Fiber glass rod is wrapped, to play better support effect.

Inner wire adopts more than one or one.Inner wire adopts copper conductor or ambrose alloy compound wire (1000 ℃) or nickel wire line (1300 ℃), to improve the heat resistance of cable.

Outer conductor, coat of metal adopt smooth metal pipe or wrinkle metal tube, and coat of metal is welded on the outer conductor.For suppressing the generation of electromagnetic radiation and electrostatic induction, outer conductor adopts copper pipe, stainless steel tube two-layer composite, and wherein stainless steel tube closely is attached to outside the copper pipe through the welding drawing, and can not there be the space centre.

Construction of cable novelty of the present utility model, cost is significantly less than the silicon dioxide cable, and is pollution-free, corrosion-resistant, is specially adapted to instrument control circuit use in the nuclear island.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is elaborated:

Fig. 1 is the cross-sectional structure schematic diagram of the utility model cable embodiment 1;

Fig. 2 is the cross-sectional structure schematic diagram of the utility model cable embodiment 2;

Fig. 3 is the cross-sectional structure schematic diagram of the utility model cable embodiment 3.

Among the figure: 1. inner wire; 2. strutting piece layer; 3. lapped insulation layer; 4. outer conductor; 5. coat of metal.

Embodiment

Cable comprises inner wire 1, and inner wire 1 peripheral parcel outer conductor 4 wraps up strutting piece 2, lapped insulation layer 3, outer conductor 4 external welding coated metal protective sleeves 5 from inside to outside successively between inner wire 1 and the outer conductor 4.

Embodiment 1

The inner wire 1 of cable is made up of sub-thread copper conductor or ambrose alloy recombination line, and in its outside braiding or wrapped strutting piece layer 2 and thick insulating barrier 3 of 0.14mm successively, wherein the rate of putting up of insulating barrier 3 is 10%～50%; The copper strips that the thick electrician's copper of vertical bag one deck 0.2mm～0.8mm becomes in lapped insulation layer 3 outside is through the outer conductor 4 of moulding, welding, at last at the thick stainless steel metal protective layer 5 of outer conductor 4 outsides welding 0.2mm～0.5mm again; Outer conductor 4 and coat of metal 5 can embossing, also embossing not.

Embodiment 2

The inner wire 1 of cable is made up of multiply copper conductor or ambrose alloy recombination line.Other is with embodiment 1.

Embodiment 3

The inner wire 1 of cable is made up of sub-thread copper conductor or ambrose alloy recombination line, in its outside braiding or wrapped one deck strutting piece layer 2 and thick insulating barrier 3 of 0.14mm successively; At the braiding of lapped insulation layer 3 outside or wrapped one deck strutting piece layer 2 and the thick insulating barrier 3 of 0.14mm, wherein the rate of putting up of insulating barrier 3 is 10%～50% again; The copper strips that the thick electrician's copper of vertical then bag one deck 0.2mm～0.8mm becomes is through the outer conductor 4 of moulding, welding, at last at the thick stainless steel metal protective sleeve 5 of outer conductor 4 outsides welding 0.2mm～0.5mm; Outer conductor 4 and metal protection protector 5 can embossing, also embossing not.

Claims

1. a fire-type telecommunication cable comprises inner wire and the outer conductor that wraps up in the inner wire periphery, it is characterized in that, wraps up strutting piece layer, lapped insulation layer between inner wire and the outer conductor from inside to outside successively; Outer conductor coats coat of metal outward.

2. fire-type telecommunication cable according to claim 1 is characterized in that, wraps up one deck strutting piece layer, one deck lapped insulation layer between lapped insulation layer and the outer conductor successively.

3. fire-type telecommunication cable according to claim 1 and 2 is characterized in that, inner wire adopts more than one or one.

4. fire-type telecommunication cable according to claim 3 is characterized in that, inner wire adopts copper conductor or ambrose alloy compound wire or nickel wire line.

5. fire-type telecommunication cable according to claim 3 is characterized in that, the strutting piece braiding in the strutting piece layer or wrapped outside inner wire or in the insulating barrier, and strutting piece and inorganic band form netted or vertical cellular type structure.

6. fire-type telecommunication cable according to claim 3 is characterized in that, the lapped insulation layer adopts inorganic mica, ceramic band and Fiber glass rod composite construction.

7. fire-type telecommunication cable according to claim 6 is characterized in that, adopts structure in the other direction when the adjacent two layers Fiber glass rod is wrapped.

8. fire-type telecommunication cable according to claim 3 is characterized in that, outer conductor, coat of metal adopt smooth metal pipe or wrinkle metal tube.

9. fire-type telecommunication cable according to claim 8 is characterized in that coat of metal is welded on the outer conductor.