CN205984375U

CN205984375U - Fireproof cable

Info

Publication number: CN205984375U
Application number: CN201620764520.4U
Authority: CN
Inventors: 沈佩芳; 刘星宏; 杨帆; 陈磊
Original assignee: NINGBO ORIENT WIRES CABLES CO Ltd
Current assignee: NINGBO ORIENT WIRES CABLES CO Ltd
Priority date: 2016-07-20
Filing date: 2016-07-20
Publication date: 2017-02-22
Anticipated expiration: 2026-07-20

Abstract

The utility model provides a fireproof cable, includes the armor, locates electrically conductive the restrainting in the armor, the inside of armor is equipped with the flame retardant coating, it has the fine yarn of alkali -free glass to pack in the space between flame retardant coating and electrically conductive the restrainting. Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses the fine yarn of well adoption alkali -free glass is as inside stopping, and it itself has certain space, and effect of thermal conductivity avoids on fire well, and with low costs, the multiple fire -retardant effectual invasion that prevents outside flame of flame retardant coating ability that separates the oxygen material and constitute, and mechanical strength is high.

Description

A kind of fire-resisting cable

Technical field

This utility model belongs to field of cables and in particular to a kind of fire-resisting cable.

Background technology

Fire-resisting cable refers to keep the cable of certain time safe operation, fire-resisting cable quilt in the case of flame combustion It is widely used in skyscraper, underground railway, undergrond street, large-scale power station and important industrial and mining establishment etc. and fire safety and fire-fighting The relevant place of lifesaving, for example, fire-fighting equipment and the urgent supply line to emergency services such as leading lights and control circuit.

At present, the general purpose reaching fire resisting by adding refractory material in fire-resisting cable.As notification number is A kind of cable being enclosed with fire resisting belt is disclosed, the material of fire resisting belt is resistance in the Chinese utility model of CN201965977U Fiery Muscovitum, has certain fire resisting effect.

This specific functional requirement for fire resisting, this utility model is made that innovation in structure, there is provided Yi Zhongxin The fire-resisting cable of type.

Utility model content

Not enough for prior art, this utility model provides a kind of fire-resisting cable, and fire resisting effect is good.

In order to solve above-mentioned technical problem, this utility model is addressed by following technical proposals.

A kind of fire-resisting cable, including armor, the conductive bundle in armor, the inside of described armor is provided with fire prevention Layer, is filled with alkali-free glass fiber yarn in the space between described fireprotection layer and conductive bundle.

Cable of the prior art, packing material therein is generally PP inserts, and fire resisting effect is poor, high cost, heat conduction Poor performance.In this utility model, it is used alkali-free glass fiber yarn as internal inserts, low cost, has in alkali-free glass fiber yarn simultaneously , there is certain air bleed capability in the gap of some, therefore can shift heat, good heat conductivity, can effectively prevent The phenomenon of the hot-spot within cable, it is to avoid on fire；Simultaneously fireprotection layer it can be avoided that or reduce external flame intrusion.

As limited, alkali-free glass fiber band that described fireprotection layer includes setting gradually from inside to outside, oxygen barrier layer, Tao Kai filling every Oxygen mud, Tao Kai fire-resistant isinglass belt, these fire-retardant oxygen barrier material can effectively prevent the intrusion of external flame, improves the fire resisting of cable Performance.

Preferably, described armor includes steel-tape armouring layer, the Tao Kai ceramic fire resisting shield setting gradually from inside to outside Jacking, high mechanical strength, it may have fire resistance well.

Preferably, described conductive bundle include setting gradually from inside to outside conductor, internal shield, insulating barrier, external shield Layer, copper strip shielding layer.

Compared with prior art, this utility model has the advantages that：Alkali-free glass fiber yarn is adopted in this utility model As internal inserts, itself there is certain space, good heat conduction effect avoids on fire, and low cost；Multiple fire-retardant oxygen barriers The fireprotection layer of material composition can effectively prevent the intrusion of external flame, and high mechanical strength.

Brief description

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the enlarged drawing of a-quadrant in Fig. 1.

Specific embodiment

With specific embodiment, this utility model is described in further detail below in conjunction with the accompanying drawings.

Referring to figs. 1 to shown in Fig. 2, a kind of fire-resisting cable, including armor, the conductive bundle in armor, described armour The inside of dress layer is provided with fireprotection layer, is filled with alkali-free glass fiber yarn 6 in the space between described fireprotection layer and conductive bundle.

In present embodiment, alkali-free glass fiber band 7 that described fireprotection layer includes setting gradually from inside to outside, oxygen barrier layer 8, Tao Kai Filling oxygen barrier mud 9, Tao Kai fire-resistant isinglass belt 10；Described armor includes steel-tape armouring layer 11, the pottery setting gradually from inside to outside Armour ceramic fire resisting protective cover material 12；Conductor 1 that described conductive bundle includes setting gradually from inside to outside, internal shield 2, insulating barrier 3, External shielding layer 4, copper strip shielding layer 5.

In actual use, voltage-drop loading is 10kV to fire-resisting cable in this utility model, 950-1000 DEG C of flame Under conditions of × 90min, ensure that internal insulating layer 3（Crosslinked polyetylene insulated layer）Do not melt, do not soften, temperature is less than 180 DEG C, during normal operation, thermal diffusivity is good, and being not in that local temperature is too high leads to cable fault.

In this utility model, the oxygen barrier mud outside oversheath and oxygen barrier layer 8 adopts ceramic high polymer material (Tao Kai material Material), Tao Kai material can burn till hard ceramic-like triumphant body supporter when 300-2000 DEG C, has the heat-insulated effect of good fire insulation Really, multilamellar Tao Kai material is effectively guaranteed oxygen barrier layer and the temperature of insulated wire cores is less than safety value, and filling adopts alkali-free glass Fine yarn 6, band adopts alkali-free glass fiber band 7, and this material is stable inorganic material, nontoxic, and heat resisting temperature is up to 660 DEG C More than, harmful flue gas will not be produced after being heated, its section is cylinder, after stranding filling, between every yarn, have good space Passage, can play good thermolysis, be not in the too high situation of local temperature under normal operation, as fire Calamity, also can guarantee that heat can preferably pass.

The above, the fire-resisting cable in this utility model, internal inserts are alkali-free glass fiber yarn 6, low cost, no simultaneously Space in alkali glass fibre yarn 6 so as in air can relative flow, therefore the heat within cable can be shifted, led Good in thermal property, can effectively prevent the phenomenon of the hot-spot within cable, it is to avoid on fire；Fireprotection layer is by multiple fire-retardant oxygen barriers simultaneously Material forms, and can effectively prevent the intrusion of external flame, improves the fire resistance of cable, it can be avoided that or reducing external flame Intrusion.

Protection domain of the present utility model includes but is not limited to embodiment of above, and protection domain of the present utility model is to weigh Sharp claim is defined, and any replacement that those skilled in the art that this technology is made is readily apparent that, deformation, improvement each fall within Protection domain of the present utility model.

Claims

1. a kind of fire-resisting cable, including armor, located at the conductive bundle in armor it is characterised in that in described armor Portion is provided with fireprotection layer, is filled with alkali-free glass fiber yarn in the space between described fireprotection layer and conductive bundle（6）；Described fireprotection layer includes The alkali-free glass fiber band setting gradually from inside to outside（7）, oxygen barrier layer（8）, Tao Kai filling oxygen barrier mud（9）, Tao Kai fire-resistant isinglass belt （10）；Described armor includes the steel-tape armouring layer setting gradually from inside to outside（11）, Tao Kai ceramic fire resisting protective cover material（12）.

2. a kind of fire-resisting cable according to claim 1 is it is characterised in that described conductive bundle includes setting successively from inside to outside The conductor put（1）, internal shield（2）, insulating barrier（3）, external shielding layer（4）, copper strip shielding layer（5）.