CN205376186U - Fine compound medium voltage cable of resistant firelight - Google Patents
Fine compound medium voltage cable of resistant firelight Download PDFInfo
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- CN205376186U CN205376186U CN201521077876.2U CN201521077876U CN205376186U CN 205376186 U CN205376186 U CN 205376186U CN 201521077876 U CN201521077876 U CN 201521077876U CN 205376186 U CN205376186 U CN 205376186U
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Abstract
The utility model relates to a fine compound medium voltage cable of resistant firelight, its characterized in that: compound medium voltage cable comprises surrounding layer and inner core, and the inner core is formed by cable core and the transposition of optical cable unit, the optical cable unit strands stranding with establishing at reinforcement loose casing line all around by a reinforcement, the cable core comprises at the insulation shielding composite bed outside the conductor conductor and crowded package, the surrounding layer by insulating layer, flame retardant coating, separate the oxygen layer, shock resistance layer and oversheath layer wrap up in proper order and forming. The product external diameter is the same with ordinary medium voltage power cable external diameter, under the condition that does not increase the cable laying cost, can realize in step that electric power optical fiber connects and functions such as power line monitoring, early warning to the upper end at family, improves the trouble reaction rate, reduces the maintenance cost of circuit.
Description
Technical field
This utility model relates to the technical field of cable, specifically a kind of fire-resistant optical fiber composite medium-pressure cable.
Background technology
Along with the rise of Internet of Things, market proposes the demand of renewal for the special optic fibre composite cable of the multi-internet integration functions such as current collection letter, electric power transmission, TV, interconnection, Internet of Things, makes the important component during intelligent grid is built.
At present, along with Chinese society rapid development of economy, the place of the important job facilities such as subway, tunnel, power plant, nuclear power station and the densely populated place such as large supermarket, conference and exhibition center gets more and more, owing to the requirement of electric power is adopted Medium voltage power supply system by load, security performance in 6～35kV cable fire situation is proposed requirement, require that cable remains to maintain a period of time normal power supply under flame conditions, in order to escape and rescue, so being badly in need of a kind of fire-resistant optical fiber composite medium-pressure cable.
Summary of the invention
The purpose of this utility model is in that to provide the fire-resistant optical fiber composite medium-pressure cable of a kind of improvement, and it is short that it can overcome cable in prior art to maintain the normal power supply time under flame conditions, is unfavorable for escape and the some shortcomings of rescue.
To achieve these goals, the technical solution of the utility model is: a kind of fire-resistant optical fiber composite medium-pressure cable, it is characterised in that: described composite medium-pressure cable is made up of surrounding layer and inner core, and inner core is formed by cable core and optical cable unit are stranded；Described optical cable unit is by a reinforcement and the Loose tube group twisted synthesizing cable being located at reinforcement surrounding；Described cable core is by conductor and is extruded in the insulation shielding composite bed outside conductor and constitutes；Described surrounding layer is wrapped up successively by thermal insulation layer, flame retardant coating, oxygen barrier layer, anti-impacting layer and external sheath layer and forming.
Preferably; optical cable unit is provided with the Loose tube group of 4-6 Loose tube composition; the center of Loose tube group is provided with the resin fibre reinforced plastics FRP reinforcement made; described; the outside of Loose tube group extrudes protection set, is equipped with optical fiber cable core in each Loose tube, and protection set is made up of waterstop and resistance to electricity trace sheath; between described protection set and Loose tube, between Loose tube and reinforcement, it is filled with water blocking yarn.Described Loose tube external diameter is 2.0-2.5mm, and wall thickness, be more than or equal to 0.35mm, is provided with 2～12 core fibres in each Loose tube.
Preferably, inner core adopts three cable cores, and three cable cores are arranged in triangle, and arranges optical cable unit at a side of triangle；Insulation shielding composite bed is wrapped up successively by conductor shield, insulating barrier and insulation screen and forming, and is enclosed with metal screen layer outside insulation shielding composite bed.
Preferred, between described thermal insulation layer and inner core, being filled with alkali-free glass rope between cable core and the optical cable unit of inner core, described alkali-free glass rope surface-coated has nano-aluminum hydroxide, thermal insulation layer is formed by alkali-free glass fibre band is wrapped, and thickness is 0.4-0.6mm；Flame retardant coating adopts ceramic polyolefin material to be extruded on thermal insulation layer and make, and the thickness of flame retardant coating is 2-4mm；Oxygen barrier layer adopts low smoke and zero halogen oxygen barrier material, is extruded on flame retardant coating, and thickness is 1.2～2.2mm.
During use, this utility model product is provided simultaneously with information communication and electric power transfer function.Light unit adopts nonmetal structure direct combination at the avris of power cable forming core, product external diameter is identical with common medium-pressure power cable external diameter, when not increasing cable laying cost, can synchronize to realize power optical fiber to connect to the upper end at family and the function such as power circuit monitoring, early warning, improve fault reaction speed, reduce the maintenance cost of circuit.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model one embodiment.
Fig. 2 is the structural representation of this utility model optical cable unit.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model will be further described.
Label in each accompanying drawing is expressed as follows:
1 optical cable unit, 11 Loose tube, 12 water blocking yarns, 13 reinforcements, 14 optical fiber, 15 waterstops, 16 resistance to electricity trace sheaths；
2 cable cores, 21 conductors, 22 conductor shields, 23 insulating barriers, 24 insulation screens, 25 metal screen layers；
3 alkali-free glass ropes, 4 thermal insulation layers, 5 flame retardant coatings, 6 oxygen barrier layers, 7 anti-impacting layers, 8 external sheath layers.
The fire-resistant optical fiber composite medium-pressure cable of one described in the utility model, its difference with the prior art is in that: described composite medium-pressure cable is made up of surrounding layer and inner core, and inner core is formed by cable core and optical cable unit are stranded；Described optical cable unit is by a reinforcement and the Loose tube group twisted synthesizing cable being located at reinforcement surrounding；Described cable core is by conductor and is extruded in the insulation shielding composite bed outside conductor and constitutes；Described surrounding layer is wrapped up successively by thermal insulation layer, flame retardant coating, oxygen barrier layer, anti-impacting layer and external sheath layer and forming.
Further; optical cable unit is provided with the Loose tube group of 4-6 Loose tube composition; the center of Loose tube group is provided with the resin fibre reinforced plastics FRP reinforcement made; described; the outside of Loose tube group extrudes protection set, is equipped with optical fiber cable core in each Loose tube, and protection set is made up of waterstop and resistance to electricity trace sheath; between described protection set and Loose tube, between Loose tube and reinforcement, it is filled with water blocking yarn.Described Loose tube external diameter is 2.0-2.5mm, and wall thickness, be more than or equal to 0.35mm, is provided with 2～12 core fibres in each Loose tube.
Further, inner core adopts three cable cores, and three cable cores are arranged in triangle, and arranges optical cable unit at a side of triangle；Insulation shielding composite bed is wrapped up successively by conductor shield, insulating barrier and insulation screen and forming, and is enclosed with metal screen layer outside insulation shielding composite bed.The ratio of the thickness of conductor shield, insulating barrier and insulation screen is 1:5:1；Described metal screen layer employing copper strips is overlapping wrapped to be formed.
Further, between described thermal insulation layer and inner core, being filled with alkali-free glass rope between cable core and the optical cable unit of inner core, described alkali-free glass rope surface-coated has nano-aluminum hydroxide, thermal insulation layer is formed by alkali-free glass fibre band is wrapped, and thickness is 0.4-0.6mm；Flame retardant coating adopts ceramic polyolefin material to be extruded on thermal insulation layer and make, and the thickness of flame retardant coating is 2-4mm；Oxygen barrier layer adopts low smoke and zero halogen oxygen barrier material, is extruded on flame retardant coating, and thickness is 1.2～2.2mm.
Anti-impacting layer adopts compound steel band gap to put up mode and makes in oxygen barrier layer around wrapping in, and steel band adopts stainless steel belt or galvanized steel strip；Oversheath flame-proof polyethylene goods low smoke and zero halogen protective cover material is made, and thickness is 1.8-2.5mm；Insulating barrier adopts low smoke and zero halogen cross-linked polyethylene insulating material to extrude and forms.
This product has the advantage that
1. product is provided simultaneously with information communication and electric power transfer function.Light unit adopts nonmetal structure direct combination at the avris of power cable forming core, product external diameter is identical with common medium-pressure power cable external diameter, when not increasing cable laying cost, can synchronize to realize power optical fiber to connect to the upper end at family and the function such as power circuit monitoring, early warning, improve fault reaction speed, reduce the maintenance cost of circuit.
1. the fire resistance of excellence: cable is under rated operational voltage, and flame temperature is not less than 750 DEG C, supplying, fuse in fire time 90min is continuous.
2. economy: structure reasonable in design, selects suitable fire-resistant fire proofing material, had both met the needs of cable fire, it is further contemplated that material selection, physical dimension, electric property, reduces the purpose of cost simultaneously.
3. environmentally friendly: heavy metal free, nontoxic, tasteless, human body, environment are not produced impact；Anti-ant, mouse bite preventing, waterproof, oil resistant.
4. good thermal insulation, the inside after heat conductivity 0.09W/Mk, particularly ablation is cellular uniformly, has better fire resistance and thermal insulation.
Embodiment
1. cable core
1.1 conductor strand.Adopting circle to press copper conductor, conductor structure is closely knit, under same cross-sectional area of conductor is long-pending, presses rear conductor diameter and reduces about 10%, thus reducing product external diameter, it is simple to install, lay.
1.2 is three-layer co-extruded.Conductor shield, insulating barrier, insulation screen adopt the three-layer co-extruded mode of production, by conductor shielding material, cross-linked polyethylene insulating material, insulation shielding material is disposable is coated on compact conductor, adopt squash type production technology, so that trilaminate material is closely linked, avoid the secondary pollution of insulant, it is ensured that the processing quality of product simultaneously.
1.3 metallic shields.The copper strips of overlapping wrapped one layer of 0.1～0.12mm in every insulated wire cores, shields electric jamming, balanced electric field, is earth potential (neutral point) except ensureing insulation shielding (semi-conductive screen), earth-fault current also can be made to pass through.
2. optical cable unit
2.1 optical fiber loose tubes.Loose tube external diameter φ 2.0～φ 2.5mm, wall thickness >=0.35mm, often pipe 2～12 core fibre.Concentricity conformance with standard requirement.Excess fiber length: 2 ‰-3 ‰. beam tube fibre cream is filled should meet dropleting flowing test requirement.
2.2 Loose tube twisted synthesizing cables.Layer-twisted type structure, center adopts non-metal reinforcement member FRP；Cable core fills block water cable cream and one layer of waterstop of cladding.
2.3 extrude oversheath.Sheath adopts AT resistance to electricity track resistant jacket material, jacket thickness: 1.8～2.5mm.
3. product mix
For three-core cable, after metallic shield, carry out stranding, simultaneously wrapped fire-retardant Halogen band, wrapped thickness 0.4～0.6mm.Fire-retardant Halogen band environment-protecting asepsis, has high temperature resistant and fire protecting performance, and heat-proof quality is excellent.In cabling procedure, three cable cores are stranded around center, and optical cable unit is filled in three cable core spaces as a core.All the other spaces use Halogen do not absorb water gasket for packing fill.
4. thermal insulation layer.For single-core cable, at the outer wrapped alkali-free glass band of metallic shield, thickness 0.4～0.6mm；For three-core cable, after metallic shield, three cores carry out stranding, core gap filling alkali-free glass rope, simultaneously wrapped alkali-free glass band, wrapped thickness 0.4～0.6mm.Glass fiber tape environment-protecting asepsis, has high temperature resistant and fire protecting performance, and heat-proof quality is excellent.
5. flame retardant coating.Flame retardant coating adopts ceramic polyolefin material to be extruded on thermal insulation layer, and ceramic polyolefin material horizontal firing self-extinguishment can not prolong combustion, more than oxygen index (OI) >=35；Have in flame, nonflame situation at 350-1600 DEG C, do not melt, do not drip, do not fall off, do not result in spot fire, burning till hard ceramic-like armour body, temperature is more high, ceramic-like armour body after time more long burning is more hard, and residue is ceramic inorganic thing, residual volume is more than 80%, ceramic-like armour physical ability forms ceramic honeycomb fine holes, it is possible to playing good fire insulation, effect of heat insulation, its excellent anti-flammability can play again good fireproof effect.
6. oxygen barrier layer.Employing extrudes mode, is coated on flame retardant coating, thickness 1.2～2.2mm.Material is low smoke and zero halogen oxygen barrier material, material oxygen index (OI) is not less than 45, filling a large amount of hydrated metal oxide in material, when being heated, hydrone evaporates, absorb major part heat, can reducing the temperature of cable, the hydrone of formation can water down the concentration of cable ambient oxygen, and the Metal oxide product of burning forms duricrust, it is coated on outside cable core, stops flame and heat to spread inside cable.Oxygen barrier layer plays separation sleeve effect simultaneously.
7. anti-impacting layer.Adopting two lamellar spacings to put up mode around wrapping in oxygen barrier layer, according to different size, thickness selects 0.2mm, 0.5mm, 0.8mm steel band respectively.For single-core cable, select stainless steel belt；For three-core cable, select galvanized steel strip.Steel-tape armouring, one is to resist impact, and two is to intercept flame.
8. oversheath.Oversheath employing extrudes mode and is extruded on steel-tape armouring layer, thickness 2～5mm.According to different needs, it is possible to select flame-proof polyethylene goods low smoke and zero halogen protective cover material.Oversheath plays a protective role.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, it is impossible to assert that this utility model is embodied as being confined to these explanations above-mentioned.For this utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, protection domain of the present utility model all should be considered as belonging to.
Claims (7)
1. a fire-resistant optical fiber composite medium-pressure cable, it is characterised in that: described composite medium-pressure cable is made up of surrounding layer and inner core, and inner core is formed by cable core and optical cable unit are stranded；
Described optical cable unit is by a reinforcement and the Loose tube group twisted synthesizing cable being located at reinforcement surrounding；
Described cable core is by conductor and is extruded in the insulation shielding composite bed outside conductor and constitutes；
Described surrounding layer is wrapped up successively by thermal insulation layer, flame retardant coating, oxygen barrier layer, anti-impacting layer and external sheath layer and forming.
2. the fire-resistant optical fiber composite medium-pressure cable of one according to claim 1, it is characterised in that: optical cable unit is provided with the Loose tube group of 4-6 Loose tube composition, and the center of Loose tube group is provided with the resin fibre reinforced plastics FRP reinforcement made,
Described, the outside of Loose tube group extrudes protection set, is equipped with optical fiber cable core in each Loose tube, and protection set is made up of waterstop and resistance to electricity trace sheath, between described protection set and Loose tube, is filled with water blocking yarn between Loose tube and reinforcement.
3. the fire-resistant optical fiber composite medium-pressure cable of one according to claim 1, it is characterised in that: inner core adopts three cable cores, and three cable cores are arranged in triangle, and arranges optical cable unit at a side of triangle；
Insulation shielding composite bed is wrapped up successively by conductor shield, insulating barrier and insulation screen and forming, and is enclosed with metal screen layer outside insulation shielding composite bed.
4. the fire-resistant optical fiber composite medium-pressure cable of one according to claim 2, it is characterised in that: described Loose tube external diameter is 2.0-2.5mm, and wall thickness, be more than or equal to 0.35mm, is provided with 2～12 core fibres in each Loose tube.
5. the fire-resistant optical fiber composite medium-pressure cable of one according to claim 1, it is characterized in that: between described thermal insulation layer and inner core, it is filled with alkali-free glass rope between cable core and the optical cable unit of inner core, described alkali-free glass rope surface-coated has nano-aluminum hydroxide, thermal insulation layer is formed by alkali-free glass fibre band is wrapped, and thickness is 0.4-0.6mm；
Flame retardant coating adopts ceramic polyolefin material to be extruded on thermal insulation layer and make, and the thickness of flame retardant coating is 2-4mm；
Oxygen barrier layer adopts low smoke and zero halogen oxygen barrier material, is extruded on flame retardant coating, and thickness is 1.2～2.2mm.
6. the fire-resistant optical fiber composite medium-pressure cable of one according to claim 1, it is characterised in that: anti-impacting layer adopts compound steel band gap to put up mode and makes in oxygen barrier layer around wrapping in, and steel band adopts stainless steel belt or galvanized steel strip；Oversheath flame-proof polyethylene goods low smoke and zero halogen protective cover material is made, and thickness is 1.8-2.5mm；
Insulating barrier adopts low smoke and zero halogen cross-linked polyethylene insulating material to extrude and forms.
7. the fire-resistant optical fiber composite medium-pressure cable of one according to claim 3, it is characterised in that: the ratio of the thickness of conductor shield, insulating barrier and insulation screen is 1:5:1；Described metal screen layer employing copper strips is overlapping wrapped to be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521077876.2U CN205376186U (en) | 2015-12-22 | 2015-12-22 | Fine compound medium voltage cable of resistant firelight |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521077876.2U CN205376186U (en) | 2015-12-22 | 2015-12-22 | Fine compound medium voltage cable of resistant firelight |
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| Publication Number | Publication Date |
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| CN205376186U true CN205376186U (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521077876.2U Active CN205376186U (en) | 2015-12-22 | 2015-12-22 | Fine compound medium voltage cable of resistant firelight |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405524A (en) * | 2015-12-22 | 2016-03-16 | 上海朗达电缆（集团）有限公司 | Fire-resistant optical fiber composite medium-voltage cable and manufacturing process of fire-resistant optical fiber composite medium-voltage cable |
| CN106340348A (en) * | 2016-11-14 | 2017-01-18 | 广州市宇洪电线电缆实业有限公司 | High-flame-retardant fireproof wiring cable for intelligent grid and client connection |
-
2015
- 2015-12-22 CN CN201521077876.2U patent/CN205376186U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405524A (en) * | 2015-12-22 | 2016-03-16 | 上海朗达电缆（集团）有限公司 | Fire-resistant optical fiber composite medium-voltage cable and manufacturing process of fire-resistant optical fiber composite medium-voltage cable |
| CN105405524B (en) * | 2015-12-22 | 2018-03-16 | 上海朗达电缆（集团）有限公司 | A kind of fire resisting optical fiber composite medium-pressure cable and its manufacture craft |
| CN106340348A (en) * | 2016-11-14 | 2017-01-18 | 广州市宇洪电线电缆实业有限公司 | High-flame-retardant fireproof wiring cable for intelligent grid and client connection |
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