CN208722611U - A kind of multistoried building medium-pressure power cable - Google Patents

A kind of multistoried building medium-pressure power cable Download PDF

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Publication number
CN208722611U
CN208722611U CN201821662863.5U CN201821662863U CN208722611U CN 208722611 U CN208722611 U CN 208722611U CN 201821662863 U CN201821662863 U CN 201821662863U CN 208722611 U CN208722611 U CN 208722611U
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China
Prior art keywords
layer
fire
cable
tension
pressure power
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Expired - Fee Related
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CN201821662863.5U
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Chinese (zh)
Inventor
陆亚军
贺欢
林爱华
张高洋
司凯宁
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JIANGSU CHANGFENG CABLE CO Ltd
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JIANGSU CHANGFENG CABLE CO Ltd
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Priority to CN201821662863.5U priority Critical patent/CN208722611U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/14Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

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Abstract

The utility model relates to a kind of multistoried building medium-pressure power cables, including three insulated wire cores, every insulated wire cores include conductor, and successively extrude conductor shield, insulating layer, insulation screen and split-phase metal screen layer thereon from inside to outside;Circle is filled out into cable core by Special tensile sector filled layer and buffering tension filled layer between three insulated wire cores, is externally provided with high fire-retardance band, fire resisting separation layer and outer jacket.The utility model uses aluminium alloy conductor, alleviates the weight of cable, by core central tensile fill and core between the special tension sector of gap setting fill, improve the safety of the stability and high-rise lifting tension of the construction of cable.Pass through fire resisting separation layer and environmentally friendly restrictive coating; 90min can be operated normally under 750 DEG C~950 DEG C flame; it provides to Field Force and adequately flees from the time, and the substance that is harmful to the human body will not be generated when cable fire, it is ensured that cable long-term safety reliability of operation.

Description

A kind of multistoried building medium-pressure power cable
Technical field
The utility model relates to field of cable technology, especially a kind of multistoried building medium-pressure power cable.
Background technique
The current skyscraper in China has been up to more than 600 meters, with constantly increasing for building, it is ensured that high-rise building power supply system Safety seem just it is most important.It selects the not critical capacity in view of cable before cable, ensure cable in vertical run Itself tensile strength, and to consider its flame-retardant performance, it is ensured that trapped person can be sufficiently given when urgent fire occurs The time fled the scene.Once cable cannot generate the substance that is harmful to the human body by flame combustion, thus the construction of cable and material are An important factor for need to considering when design.
The current skyscraper majority in China is connected feeder pillar by leader cable and is reached respectively based on copper core lv power cable A floor increases fire resisting and fire proofing by the design of structure, and can also realize can continue for some time when cable meets fire burning Power supply, adequately fled from the time to live trapped person, but need to lay needed for several cables just can meet entire building layer, not only Cost is increased, and since cable conductor uses copper for electric conductor, cable is heavier, brings to the maintenance in laying installation and later period It is inconvenient.
Country's investment high rise building cable, which has, does leader cable using 3.6/6~26/35kV power cable, then passes through Transformation is transported to each floor, and cable primary structure is that copper conductor and lifting tension zinc-coated wire realize high-rise vertical lifting. Using the intrinsic tensile characteristics of the zinc-coated wire, the safety of high-rise suspension can be improved, but also increase cable weight simultaneously;It adopts With lifting metal steel wire structure, induced potential can be generated when conveying power transformation, while can also generate vortex and conductor temp.-elevating, not only greatly The rated current-carrying capacity of width reduction conductor, it is also possible to cable thermal breakdown be caused to cause great power outage;Conductor is generally adopted simultaneously With copper conductor, because floor is higher, cross-sectional area of conductor need to be increased in order to meet floor power supply capacity and realized, this is undoubtedly increases electricity The cost of cable also increases the weight of cable.China is the country that copper lacks rich bauxite resource, since domestic copper ore resource is basic Close to exhaustion, copper material largely relies on import, and copper material is expensive.
Utility model content
The applicant provides a kind of multistoried building medium voltage electricity electricity for the disadvantage in above-mentioned existing production technology Cable replaces copper conductor using aluminium alloy molded line conductor, reduces conductor diameter, reduce cable cost, alleviate the weight of cable Amount.Have many advantages, such as that good flame retardant property, high current-carrying capacity, light-weight, environmentally friendly, tensile strength is high, fire resisting, builds especially suitable for high level It builds and uses medium-pressure power cable, to improve the safety of skyscraper medium-pressure power cable operation, stability and cable laying Economy.
Technical solution used by the utility model is as follows:
A kind of multistoried building medium-pressure power cable, including three insulated wire cores, the structure of every insulated wire cores are as follows: packet It includes aluminium alloy conductor and successively extrudes the conductor shield, insulating layer, insulation shielding in aluminum alloy conductor outer layer from inside to outside Layer and split-phase metal screen layer;Three insulated wire cores are twisted in a triangle, in-between gap location filled with buffering tension filled layer, Rounding is filled by Special tensile sector filled layer at adjacent segment two-by-two and is twisted into cable core;High resistant is successively enclosed with outside cable core Combustion layer and fire resisting separation layer, the fire resisting separation layer are externally provided with outer jacket;The aluminium alloy conductor uses 8030 aluminium alloy molded line It is twisted, the rounded structure in center, the outer ring of circular configuration is by the fan-shaped circumferential layer around circular configuration of every single line Layer is twisted integral.
Its further technical solution is:
The Special tensile sector filled layer include fan-shaped packing and be wrapped in fan-shaped packing outer ring tension it is triumphant Husband's drawstring (Kevlar English original name KEVLAR is a kind of brand name for aramid fiber material product that DuPont Corporation develops, Material original name is " poly(p-phenylene terephthalamide) ", and continuous use temperature range is extremely wide, within the scope of -196 DEG C to 204 DEG C It can operate normally for a long time, the shrinking percentage at 150 DEG C is 0, does not decompose non-fusible, the resistance to height of Kev drawstring at a high temperature of 560 DEG C Temperature, fire protection flame retarding is light-weight, and intensity is high, and modulus is high, and dimensionally stable, shrinking percentage is low, resistance to puncture, abrasion performance, heat resistance, resistance toization Corrosion is learned, good mechanical property, dielectricity is good), wherein fan-shaped packing uses low-smoke halide-free fireproof composite polyolefine material, oxygen index (OI) >= 38%.
The buffering tension filled layer uses circular tension Kev drawstring.
The high fire-retardance layer is halogen-free high flame-retardant band, and at one or more layers overlapping outside cable core, high fire-retardance layer Overall thickness >=0.2mm.
The fire resisting separation layer is one layer of fire-proof mud being extruded in outside high fire-retardance layer, one or more layers wrapped nothing outside fire-proof mud Halogen high fire-retardance band, overall thickness >=3.0mm of fire resisting separation layer.
The outer jacket is extruded using black low-smoke halide-free fireproof composite polyolefine material, oxygen index (OI) >=36%.
The beneficial effects of the utility model are as follows:
1, the utility model is compact-sized, reasonable, and cable core is twisted in a triangle by three insulated wire cores, adjacent insulation Core gap is equipped with buffering tension filling using Special tensile sector filled layer and center clearance;Filled layer is fan-shaped packing, Its surrounding winds tension Kev drawstring again, and center-filled is also tension Kev drawstring.Packing uses low-smoke non-halogen flame-retardant material Material is extruded from, fire-retardant oxygen index (OI) ≮ 38%;Tension Kev drawstring has high tensile strength, is 5~6 times of steel, weight It is the 1/5 of steel, and lighter than steel wire, also there is high temperature resistant, fire protection flame retarding, modulus is high, and dimensionally stable, shrinking percentage is low, and it is resistance to puncture, it is resistance to The advantages that abrasion, heat resistance is resistant to chemical etching, good mechanical property, and dielectricity is good.Therefore the structure has tension, fire-retardant property Can and compare equal tensile strength structure cable, have the characteristics that it is light-weight, also ensure cable skyscraper suspension safely And the operation of long-term normal safety, moreover it is possible to avoid generating induced potential using structure of steel wire when conveying power transformation, improve cable Current-carrying capability.
2, the aluminium alloy conductor of the utility model use aluminium alloy molded line be twisted conductor, tightening factor up to 93% with On, compared with the circular configuration of same nominal area of section, the outside diameter of cable can reduce 5%, compared with using copper material conductor, cost 30% can be reduced.
3, the utility model fire resisting separation layer is used is extruded in outside cable core added with magnesium hydroxide, aluminium hydroxide fire-proof mud, When fire-proof mud is heated up to 300 DEG C or more, magnesium hydroxide, aluminium hydroxide can decompose absorb comburant surface heat play it is fire-retardant Effect;The oxygen on large quantity of moisture dilution combustion things surface is released simultaneously, and the activated magnesia for decomposing generation is attached to combustible table Face further prevents the progress of burning.Ultimately form one layer of hard protection shell, fire-retardant flame extends internally, play every The effect of temperature drop temperature, cable can operate normally 90min under 750 DEG C~950 DEG C flame, encounter stranded to scene when urgent fire Personnel, which provide, adequately to flee from the time;In addition oversheath extrudes molding using flame-retardant low-smoke halogen-free, when cable fire, will not be produced The raw harmful substance to human body, environmental-protecting performance: burning light transmittance is greater than 80%, and content of halogen is lower than 0.05%, and pH value is big In 4.3, conductivity is less than 10 μ s/mm.Improve the reliability of cable running safety.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein: 11, insulated wire cores;111, aluminium alloy conductor;112, conductor shield;113, insulating layer;114, insulation screen Cover layer;115, metal screen layer;22, Special tensile sector filled layer;221, fan-shaped packing;222, tension Kev drawstring;33, High fire-retardance layer;44, fire resisting separation layer;55, outer jacket;66, tension filled layer is buffered.
Specific embodiment
With reference to the accompanying drawing, illustrate specific embodiment of the present utility model.
As shown in Figure 1, the multistoried building medium-pressure power cable of the present embodiment, including three insulated wire cores 11, every The structure of insulated wire cores 11 are as follows: successively extrude in 111 outer layer of aluminium alloy conductor including aluminium alloy conductor 111 and from inside to outside Conductor shield 112, insulating layer 113, insulation screen 114 and split-phase metal screen layer 115;Three 11 finished products of insulated wire cores Font is twisted, in-between gap location filled with buffering tension filled layer 66, it is adjacent two-by-two between gap location pass through and Special tensile Fan-shaped filled layer 22 fills rounding, and forms cable core;High fire-retardance layer 33 and fire resisting separation layer 44, resistance to fire screen are successively arranged outside cable core Absciss layer 44 is externally provided with outer jacket 55;
Aluminium alloy conductor 111 is drawn using 8030 aluminium alloy rods of ASTM B800-05 standard requirements by mould Form wire monofilament is twisted, or by roll forming list rope-lay conductor, one time wire drawing process is formed, the rounded knot of central core Structure, each layer is trapezoidal is twisted into round conductor for remaining.
Three insulated wire cores 11 are twisted into cable core in a triangle, and cable core intermediate space is filled using buffering tension filled layer 66 Closely knit, circle is filled out using Special tensile sector filled layer 22 in surrounding gap.
Special tensile sector filled layer 22 is including fan-shaped packing 221 and is wrapped in the anti-of fan-shaped 221 outer ring of packing Kev drawstring 222 is drawn, wherein fan-shaped packing 221 uses low-smoke halide-free fireproof composite polyolefine material, oxygen index (OI) >=38%.
It buffers tension filled layer 66 and uses circular tension Kev drawstring 222.
High fire-retardance layer 33 is halogen-free high flame-retardant band, and at one or more layers overlapping outside cable core, high fire-retardance layer 33 Overall thickness >=0.2mm.
It is tightened after cable core is twisted using 33 band of high fire-retardance layer, thickness ≮ 0.2mm, at least one layer of halogen-free high flame-retardant band is put up It is wrapped, overlap rate ≮ 15%.
Fire resisting separation layer 44 is one layer of fire-proof mud being extruded in outside high fire-retardance layer 33, one or more layers wrapped nothing outside fire-proof mud Halogen high fire-retardance band, thickness are not less than 0.2mm, wrapped Duplication >=15%, overall thickness >=3.0mm of fire resisting separation layer 44.It is anti- Chamotte is uniformly mixed by inorganic metal hydrate, curing agent, binder, softening agent by weight 50:40:1:1, passes through twin-screw Extruder extrusion cladding is outside cable core.Fire-proof mud main component is using the inorganic mineral materials such as magnesium hydroxide, aluminium hydroxide, combustion Water vapor absorption heat can be decomposited after burning reduces cable ambient temperature, and hard gear fire screen thermosphere barrier high temp fire is formed after dehydration Flame is to the erosion inside cable.
Outer jacket 55 is extruded using black low-smoke halide-free fireproof composite polyolefine material, oxygen index (OI) >=36%, the feature of environmental protection Can: burning light transmittance is greater than 80%, and content of halogen is lower than 0.05%, and pH value is greater than 4.3, and conductivity is less than 10 μ s/mm.
The utility model uses aluminium alloy conductor, alleviates the weight of cable, is filled by core central tensile and core Between gap setting the filling of special tension sector, improve the safety of the stability and high-rise lifting tension of the construction of cable. By fire resisting separation layer and environmentally friendly restrictive coating, 90min can be operated normally under 750 DEG C~950 DEG C flame, be provided to Field Force It adequately flees from the time, and when cable fire will not generate the substance that is harmful to the human body, it is ensured that the operation of cable long-term safety Reliability.
Above description is the explanation to the utility model, is not the restriction to utility model, defined by the utility model Range is within the protection scope of the utility model referring to claim, can make any type of modification.

Claims (6)

1. a kind of multistoried building medium-pressure power cable, it is characterised in that: including three insulated wire cores (11), every insulated wire The structure of core (11) are as follows: successively extrude in aluminium alloy conductor (111) outer layer including aluminium alloy conductor (111) and from inside to outside Conductor shield (112), insulating layer (113), insulation screen (114) and split-phase metal screen layer (115);Three insulated wires Core (11) is twisted in a triangle, and in-between gap location, which is filled at buffering tension filled layer (66), two-by-two adjacent segment, passes through spy Kind tension sector filled layer (22) filling rounding is simultaneously twisted into cable core;High fire-retardance layer (33) and resistance to fire screen are successively enclosed with outside cable core Absciss layer (44), the fire resisting separation layer (44) are externally provided with outer jacket (55);The aluminium alloy conductor (111) uses 8030 aluminium alloys Molded line is twisted, the rounded structure in center, and the outer ring of circular configuration is by the fan-shaped circle around circular configuration of every single line Week is twisted into one layer by layer.
2. a kind of multistoried building medium-pressure power cable as described in claim 1, it is characterised in that: the Special tensile fan Shape filled layer (22) includes fan-shaped packing (221) and the tension Kev drawstring for being wrapped in fan-shaped packing (221) outer ring (222), wherein fan-shaped packing (221) uses low-smoke halide-free fireproof composite polyolefine material, oxygen index (OI) >=38%.
3. a kind of multistoried building medium-pressure power cable as described in claim 1, it is characterised in that: the buffering tension is filled out It fills layer (66) and uses circular tension Kev drawstring (222).
4. a kind of multistoried building medium-pressure power cable as described in claim 1, it is characterised in that: the high fire-retardance layer It (33) is halogen-free high flame-retardant band, and at one or more layers overlapping outside cable core, the overall thickness of high fire-retardance layer (33) >= 0.2mm。
5. a kind of multistoried building medium-pressure power cable as described in claim 1, it is characterised in that: the fire resisting separation layer (44) to be extruded in the one layer of fire-proof mud of high fire-retardance layer (33) outside, one or more layers wrapped halogen-free high flame-retardant band outside fire-proof mud is resistance to Overall thickness >=3.0mm of fire screen absciss layer (44).
6. a kind of multistoried building medium-pressure power cable as described in claim 1, it is characterised in that: the outer jacket (55) It is extruded using low-smoke halide-free fireproof composite polyolefine material, oxygen index (OI) >=36%.
CN201821662863.5U 2018-10-12 2018-10-12 A kind of multistoried building medium-pressure power cable Expired - Fee Related CN208722611U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111540525A (en) * 2020-05-26 2020-08-14 安徽太平洋电缆股份有限公司 Heat-insulating bottle type B1-grade light fireproof cable
CN111863307A (en) * 2020-07-16 2020-10-30 中复碳芯电缆科技有限公司 Aluminum alloy insulation flexible cable of lightning protection system in wind power blade and manufacturing method thereof
CN112071477A (en) * 2020-09-09 2020-12-11 中复碳芯电缆科技有限公司 Aluminum alloy insulation flexible cable applied to lightning protection system in wind power blade and preparation method thereof
CN112133488A (en) * 2020-09-23 2020-12-25 昆明昆宝电线电缆制造有限公司 Power cable for hydraulic reactor nuclear power station

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111540525A (en) * 2020-05-26 2020-08-14 安徽太平洋电缆股份有限公司 Heat-insulating bottle type B1-grade light fireproof cable
CN111863307A (en) * 2020-07-16 2020-10-30 中复碳芯电缆科技有限公司 Aluminum alloy insulation flexible cable of lightning protection system in wind power blade and manufacturing method thereof
CN112071477A (en) * 2020-09-09 2020-12-11 中复碳芯电缆科技有限公司 Aluminum alloy insulation flexible cable applied to lightning protection system in wind power blade and preparation method thereof
CN112071477B (en) * 2020-09-09 2022-03-18 中复碳芯电缆科技有限公司 Aluminum alloy insulation flexible cable applied to lightning protection system in wind power blade and preparation method thereof
CN112133488A (en) * 2020-09-23 2020-12-25 昆明昆宝电线电缆制造有限公司 Power cable for hydraulic reactor nuclear power station

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Granted publication date: 20190409