CN209691471U - Low smoke, zero halogen midium voltage cable - Google Patents

Abstract

The utility model discloses a kind of low smoke, zero halogen midium voltage cable, including several core groups, each core group includes conductor, the conductor shield being wrapped in outside conductor, the insulating layer being wrapped in outside conductor shield, the insulation screen being wrapped in outside insulating layer and the copper strip shielding layer being wrapped in outside insulation screen, all core groups are wrapped in one by thermal insulation layer, it is formed by between adjacent core group in gap and thermal insulation layer is formed by gap with core group filled with low smoke, zero halogen heat-conducting layer, the outside of thermal insulation layer is enclosed with oxygen barrier layer, the outside of oxygen barrier layer is enclosed with refuge floor, the outside of refuge floor is enclosed with oversheath；The utility model has conductor creep-resistant property good, the high advantage of high fire-retardance, refractory temperature height, low smoke, zero halogen, voltage class compared with traditional midium voltage cable on the market.

Description

Low smoke, zero halogen midium voltage cable

Technical field

The utility model relates to field of cable technology, and in particular to a kind of low smoke, zero halogen midium voltage cable.

Background technique

Low smoke, zero halogen cable generally is pressure resistance and concentrates on 0.6/1kV and product below currently on the market, and type also compares It is more.With the continuous promotion of modern construction, electricity consumption is also continuously increased, midium voltage cable (it is resistance to be pressed in 3.6/6~26/35kV it Between) widely applied, still, the fire resisting combustibility of midium voltage cable on the market cannot be guaranteed at present, in a fire It often first powers off, so, so that entire rear end also all has a power failure, so that difficulty can be all brought to fire-fighting, escape.This Outside, midium voltage cable at present on the market can release dense black smoke and hydrogen chloride (HCI) gas in fire, to can make Trapped person can't see evacuation path and suck toxic gas and suffocate, and form secondary disaster, meanwhile, current midium voltage cable is not Can be Combustion System in limited range, fire is easy to happen sprawling, increase corrosion to communal facility, building and Injury to people, results in greater loss.

Utility model content

In view of the deficiencies of the prior art, the utility model provides a kind of low smoke, zero halogen midium voltage cable, on the market with tradition Midium voltage cable compare, have conductor creep-resistant property good, high excellent of high fire-retardance, refractory temperature height, low smoke, zero halogen, voltage class Point.

The low smoke, zero halogen midium voltage cable of the utility model, including several core groups, each core group include conductor, packet It is rolled in the conductor shield outside conductor, the insulating layer being wrapped in outside conductor shield, the insulation being wrapped in outside insulating layer Shielded layer and the copper strip shielding layer being wrapped in outside insulation screen, all core groups are wrapped in one, adjacent lines by thermal insulation layer It is formed by between core group in gap and thermal insulation layer is formed by gap with core group and is filled with low smoke, zero halogen heat-conducting layer, every The outside of thermosphere is enclosed with oxygen barrier layer, and the outside of oxygen barrier layer is enclosed with refuge floor, and the outside of refuge floor is enclosed with oversheath.

The low smoke, zero halogen midium voltage cable of the utility model, wherein conductor is by copper product, aluminum material or aluminum alloy materials system At.

The low smoke, zero halogen midium voltage cable of the utility model, wherein copper strip shielding layer is by bare copper strip around insulation screen It is formed behind outside.

The low smoke, zero halogen midium voltage cable of the utility model, wherein low smoke, zero halogen heat-conducting layer is by halogen-free environment-friendly type high fire-retardance glass Glass silk fiber is made.

The low smoke, zero halogen midium voltage cable of the utility model, wherein low smoke and zero halogen of the thermal insulation layer by oxygen index (OI) greater than 35% hinders Combustible material is made.

The low smoke, zero halogen midium voltage cable of the utility model, wherein oversheath by high transparency low-smoke non-halogen flame-retardant polyene Hydrocarbon material is made.

The utility model has conductor creep-resistant property good, high fire-retardance, fire resisting compared with traditional midium voltage cable on the market The high advantage of temperature height, low smoke, zero halogen, voltage class.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:

Fig. 1 is the schematic cross-sectional view of the utility model；

Fig. 2 is amplified structural schematic diagram at A in Fig. 1.

Specific embodiment

Multiple embodiments that the utility model will be disclosed with schema below, as clearly stated, in many practices Details will be explained in the following description.It should be appreciated, however, that the details in these practices does not apply this with limitation practical new Type.That is, the details in these practices is non-essential in some embodiments of the utility model.In addition, for letter For the sake of changing schema, some known usual structures and component will be painted it in the drawings in simply illustrative mode.

In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and non-specifically The meaning of order or cis-position is censured, it is also non-to limit the utility model, it is retouched just for the sake of difference with same technique term The component stated or operation are not understood to indicate or imply its relative importance or implicitly indicate indicated technology The quantity of feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution Conjunction is not present, also not within the protection scope of the requires of the utility model.

The low smoke, zero halogen midium voltage cable of the utility model, including several core groups, each core group include conductor 1, It is wrapped in the conductor shield 2 outside conductor 1, the insulating layer 3 being wrapped in outside conductor shield 2, is wrapped in outside insulating layer 3 Insulation screen 4 and the copper strip shielding layer 5 that is wrapped in outside insulation screen 4, all core groups be wrapped in one by thermal insulation layer 6 Body, be formed by gap between adjacent core group and thermal insulation layer 6 and core group be formed by gap it is low filled with Halogen Cigarette heat-conducting layer 7, the outside of thermal insulation layer 6 are enclosed with oxygen barrier layer 8, and the outside of oxygen barrier layer 8 is enclosed with refuge floor 9, the outside of refuge floor 9 It is enclosed with oversheath 10.

Conductor 1 is made of copper product, aluminum material or aluminum alloy materials；Conductor in the utility model is by monofilament using special-shaped Mold draws and carries out that not back twist is twisted to be spliced, and circular monofilaments radical is no more than 1 before conductor strand, in compacting process In, conductor monofilament deflection is small, and conductor heating is low, and finished product conductivity is high, compact-sized, tightening factor up to 95% or more, this Sample one enables in conductor longtime running, and creep-resistant property is good, and antioxygenic property is good.

Copper strip shielding layer 5 is formed behind 4 outside of insulation screen by bare copper strip, and copper strip shielding layer can be homogenized electricity Short circuit current when field, carrying capacity current and short circuit, while electromagnetic interference can be shielded.

Low smoke, zero halogen heat-conducting layer 7 is made by halogen-free environment-friendly type high fire-retardance glass fiber, the halogen-free environment-friendly type high resistant It fires glass fiber and is free of asbestos component, and have the advantages that chemical property is stable under thermal conductivity is good, flexibility is good and high temperature.

Halogen-free low-smoke flame retardant material of the thermal insulation layer 6 by oxygen index (OI) greater than 35% is made, the halogen-free low-smoke flame retardant material The middle a large amount of inorganic hydrated metal oxide (magnesium hydroxide, aluminium hydroxide etc.) of addition, the material can decomposite knot when heated Heshui makes cable cooling and effective trap heat, while can react to form stiff shell.

Oxygen barrier layer in the utility model uses nonmetallic oxygen barrier material, ensure that softness of the cable in laid processes is special Property, which starts sintering (catalysis) in the case where flame ablation, generates the gear fire of ceramic-like shell after the 2~4min that burns Layer, can effectively obstruct burning away for flame, when ceramic-like shell continue under the combustion catalysis of 700~900 DEG C of thermal-flames, SiO2 ceramics can be then generated, 700~1300 DEG C of thermal-flame ablations can be stood at this time, since ceramic-like shell is hard, had Certain insulation performance and has certain mechanical performance, therefore the water that can resist scene of fire pours, indirectly mechanical shake It is dynamic and external oxygen to enter, prevent/delay the burning of internal material.

Oversheath 10 is made of the low-smoke halide-free fireproof composite polyolefine material of high transparency, material smoke in combustion It measures extremely low and pernicious gas will not be generated, can avoid the secondary hazards caused by personnel.

Upper described only the embodiments of the present invention, is not intended to limit the utility model.For this field For technical staff, various modifications and changes may be made to the present invention.The interior institute of all spirit and principle in the utility model Any modification, equivalent substitution, improvement and etc. of work should all include within the scope of the claims of the utility model.

Claims (1)

1. a kind of low smoke, zero halogen midium voltage cable, it is characterised in that: including several core groups, each core group includes conductor (1), it is wrapped in the external conductor shield (2) of conductor (1), is wrapped in the external insulating layer (3) of conductor shield (2), package In the external insulation screen (4) of insulating layer (3) and it is wrapped in the external copper strip shielding layer (5) of insulation screen (4), institute is wired Core group is wrapped in one by thermal insulation layer (6), is formed by gap between adjacent core group and thermal insulation layer (6) and core group institute shape At gap in be filled with low smoke, zero halogen heat-conducting layer (7), the outside of the thermal insulation layer (6) is enclosed with oxygen barrier layer (8), it is described every The outside of oxygen layer (8) is enclosed with refuge floor (9), and the outside of the refuge floor (9) is enclosed with oversheath (10), the conductor (1) It is made of copper product, aluminum material or aluminum alloy materials, the copper strip shielding layer (5) is by bare copper strip around insulation screen (4) It is formed behind outside, the low smoke, zero halogen heat-conducting layer (7) is made by halogen-free environment-friendly type high fire-retardance glass fiber, described heat-insulated Halogen-free low-smoke flame retardant material of the layer (6) by oxygen index (OI) greater than 35% is made, and the oversheath (10) is by the low of high transparency Cigarette halogen-free anti-flaming polyolefin material is made.