CN207663831U - A kind of fire proof power cable - Google Patents

Abstract

The utility model discloses a kind of fire proof power cables, including cable core and the belting layer, fireprotection layer and the restrictive coating that wrap up cable core successively from inside to outside, and filled layer is additionally provided between the cable core and belting layer；The cable core is cross linked insulation cable core comprising copper conductor and the insulating layer and shielded layer for wrapping up copper conductor successively from inside to outside；The fireprotection layer is ceramic low smoke, zero halogen polyolefin fireprotection layer, and the thickness of fireprotection layer is 4 5.5mm；The fire proof power cable fire resistance is good, the setting of fireprotection layer can prevent cable to be burned, avoid cable core breakdown situation at high temperature under high pressure, it remains to maintain fire fighting power supply and fire extinguishing, alarm, illumination, the normal operation of communication cable under special disaster scenario, has ensured communication, electric power in case of fire safe and smooth.

Description

A kind of fire proof power cable

Technical field

The utility model is related to construction of cable technical fields, and in particular to a kind of fire proof power cable.

Background technology

In recent years, with the propulsion of urbanization and urban planning and construction, domestic skyscraper, oil, mine, smelting The construction of gold, ship, power station, subway, airport, station, tunnel traffic, and large-scale Public Physical Education, public place of entertainment, public transport The increase of facility, in automatic safe fire-fighting system and emergency power supply system, as the fire prevention peace in electric energy and information transmission and control Full importance shows especially out.How in the event of a fire, the unimpeded of electric power and communication is ensured within a certain period of time, most Valuable rescue time is won to limits, reducing the losses of casualties and lives and properties, to become people in the urgent need to address The problem of.

Currently, the common fire-resisting cable using oxidation magnesium mineral fire-proof insulation cable and mica tape winding goes to solve both at home and abroad Above-mentioned problem, but aoxidize magnesium mineral fire-proof insulation cable and need special manufacturing and processing equipment, material price is expensive, fund Input is big, and production and processing is difficult, transports and install and use inconvenience so that and practical application is somewhat limited, it is difficult to Extensive universal use.And mica tape winding fire-resisting cable due to needing multi-lay winding in process of production, in addition technique item Part limits, and be easy to cause at overlapping the slot and defect occurs, and mica tape meeting embrittlement after baked wheaten cake, is easy to fall off, causes fire resisting effect Difference.Under conditions of high temperature and pressure, the insulating layer of cable is more easily damaged, and finally causes short circuit, does not have resistance to fire action, it is difficult to Ensure communication, electric power in case of fire safe and smooth.

Utility model content

For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of fire proof power cables, this is anti- Thermoelectricity power cable fire is functional, and the setting of fireprotection layer can prevent cable to be burned, and avoid cable core at high temperature under high pressure Breakdown situation remains to maintaining fire fighting power supply and fire extinguishing, alarm, illumination, communication cable just under special disaster scenario Often running has ensured communication, electric power in case of fire safe and smooth.

The utility model is realized using following technical scheme：A kind of fire proof power cable, including cable core and from inside to outside according to Belting layer, fireprotection layer and the restrictive coating of secondary package cable core, filled layer is additionally provided between the cable core and belting layer；The cable core is Cross linked insulation cable core comprising copper conductor and the insulating layer and shielded layer for wrapping up copper conductor successively from inside to outside；The fireprotection layer Thickness for ceramic low smoke, zero halogen polyolefin fireprotection layer, fireprotection layer is 4-5.5mm.

Further, the quantity of the cable core is 2-3.

Further, the filled layer is alkali-free glass fibre filled layer.

Further, the belting layer is alkali-free glass fibre belting layer.

Further, the thickness of the fireprotection layer is 4.5mm.

Further, the restrictive coating is armouring low smoke, zero halogen restrictive coating comprising first wrapped up successively from inside to outside Sheath belting layer, armouring galvanized steel belt, low smoke, zero halogen polyolefin oxygen barrier, the second sheath belting layer and outer jacket.

Armouring low smoke, zero halogen restrictive coating makes cable generated smog in by 2~3min of flame combustion early period be nothing It is malicious, Halogen, it sinters hard ceramic-like shell into after low smoke, zero halogen polyolefin oxygen barrier burning therein, is cooperateed with fireprotection layer It strengthens to the protection inside cable, armouring galvanized steel belt therein can also play the role of protection against pressure.

Further, the armouring galvanized steel belt is netted armored galvanized steel belt, by armouring zinc-coated wire with netted The mode of intertexture is formed.

Netted armored galvanized steel belt is able to maintain that the certain bending performance of cable, improves when prepared by processing and when use The flexibility ratio of time.

Further, the first sheath belting layer is alkali-free glass fibre the first sheath belting layer；Second sheath Belting layer is alkali-free glass fibre the second sheath belting layer.

Alkali-free glass fibre can be accelerated to give up smoking fire-retardant.

Further, the thickness of the first sheath belting layer and the second sheath belting layer is 0.2mm.

Wherein, alkali-free glass fibre can be accelerated to give up smoking fire-retardant.

Wherein, ceramic low smoke, zero halogen polyolefin fireprotection layer and low smoke, zero halogen polyolefin oxygen barrier are to be with vistanex Base-material is added efficiently at porcelain filling, fire retardant and other function additives, through mixing, plasticizing, is granulated, has nontoxic, nothing Taste, high-low temperature resistant, resistance to ozone aging, weathering aging, excellent electrical insulation capability, while there is extraordinary insulating refractory effect With good processing performance.

The application scenarios of the utility model include but not limited to be used as medium-pressure power cable, and middle pressure refers to 3-35kV electricity The scene of pressure.

Compared with prior art, the beneficial effects of the utility model are：

1, the utility model fire resistance is good, and the setting of fireprotection layer can prevent cable to be burned, and avoid cable core and exist Breakdown situation under high temperature and pressure；

2, the fireprotection layer of the utility model is ceramic low smoke, zero halogen polyolefin fireprotection layer, is 4-5.5m m conditions in slice width Under, 1~2min of burning starts to sinter hard ceramic-like shell into, can effectively stop that flame burns away cable, fire resisting It is functional；Stable support housing still can be provided under special disaster scenario in cable core periphery, cable core is protected.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model；

In figure, 1, cable core；11, copper conductor；12, insulating layer；13, shielded layer；2, filled layer；3, belting layer；4, fireprotection layer； 5, restrictive coating；51, the first sheath belting layer；52, armouring galvanized steel belt；53, low smoke, zero halogen polyolefin oxygen barrier；54, second Sheath belting layer；55, outer jacket.

Specific implementation mode

In the following, in conjunction with attached drawing and specific implementation mode, the utility model is described further：

Referring to Fig.1, a kind of fire proof power cable, including cable core 1 and from inside to outside successively package cable core 1 filled layer 2, packet Belt 3, fireprotection layer 4 and restrictive coating 5；Cable core 1 is cross linked insulation cable core 1 comprising copper conductor 11 and is wrapped up successively from inside to outside The insulating layer 12 and shielded layer 13 of copper conductor 11；Fireprotection layer 4 is ceramic low smoke, zero halogen polyolefin fireprotection layer 4, and thickness is 4.5mm。

As preferred embodiment, the quantity of cable core 1 is 3.

As preferred embodiment, filled layer 2 is alkali-free glass fibre filled layer 2.

As preferred embodiment, belting layer 3 is alkali-free glass fibre belting layer 3.

As preferred embodiment, restrictive coating 5 is armouring low smoke, zero halogen restrictive coating 5 comprising is wrapped successively from inside to outside The first sheath belting layer 51, armouring galvanized steel belt 52, low smoke, zero halogen polyolefin oxygen barrier 53, the second sheath belting layer 54 wrapped up in With outer jacket 55.

As preferred embodiment, armouring galvanized steel belt 52 is netted armored galvanized steel belt 52, zinc-plated by armouring Steel wire is formed in a manner of netted intertexture.

As preferred embodiment, the first sheath belting layer 51 is the first sheath of alkali-free glass fibre belting layer 51；The Two sheath belting layers 54 are the second sheath of alkali-free glass fibre belting layer 54.

As preferred embodiment, the thickness of the first sheath belting layer 51 and the second sheath belting layer 54 is 0.2mm.

The application scenarios of the present embodiment are to be used as medium-pressure power cable, and middle pressure refers to the scene of 3-35kV voltages.

It will be apparent to those skilled in the art that technical solution that can be as described above and design, make various other Corresponding change and deformation, and all these changes and deformation should all belong to the protection of the utility model claims Within the scope of.

Claims (9)

1. a kind of fire proof power cable, including cable core and the belting layer, fireprotection layer and the restrictive coating that wrap up cable core successively from inside to outside, It is characterized in that, being additionally provided with filled layer between the cable core and belting layer；The cable core is cross linked insulation cable core comprising copper is led Body and the insulating layer and shielded layer for wrapping up copper conductor successively from inside to outside；The fireprotection layer is anti-for ceramic low smoke, zero halogen polyolefin The thickness of fire bed, fireprotection layer is 4-5.5mm.

2. fire proof power cable as described in claim 1, which is characterized in that the quantity of the cable core is 2-3.

3. fire proof power cable as described in claim 1, which is characterized in that the filled layer is filled for alkali-free glass fibre Layer.

4. fire proof power cable as described in claim 1, which is characterized in that the belting layer is alkali-free glass fibre band Layer.

5. fire proof power cable as described in claim 1, which is characterized in that the thickness of the fireprotection layer is 4.5mm.

6. fire proof power cable as described in claim 1, which is characterized in that the restrictive coating is armouring low smoke, zero halogen sheath Layer comprising the first sheath belting layer, armouring galvanized steel belt, the low smoke, zero halogen polyolefin wrapped up successively from inside to outside is oxygen barrier Layer, the second sheath belting layer and outer jacket.

7. fire proof power cable as claimed in claim 6, which is characterized in that the armouring galvanized steel belt plates for netted armored Zinc steel belt layer is formed by armouring zinc-coated wire in a manner of netted intertexture.

8. fire proof power cable as claimed in claim 6, which is characterized in that the first sheath belting layer is that alkali-free glass is fine Tie up the first sheath belting layer；The second sheath belting layer is alkali-free glass fibre the second sheath belting layer.

9. fire proof power cable as claimed in claim 6, which is characterized in that the first sheath belting layer and the second sheath packet The thickness of belt is 0.2mm.