CN201773638U - Fireproof, heat-proof and environment-friendly power cable - Google Patents
Fireproof, heat-proof and environment-friendly power cable Download PDFInfo
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- CN201773638U CN201773638U CN2010201973335U CN201020197333U CN201773638U CN 201773638 U CN201773638 U CN 201773638U CN 2010201973335 U CN2010201973335 U CN 2010201973335U CN 201020197333 U CN201020197333 U CN 201020197333U CN 201773638 U CN201773638 U CN 201773638U
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Abstract
The utility model discloses a fireproof, heat-proof and environment-friendly power cable which comprises a core wire, an aluminum strip layer wrapped on the outer side of the core wire and an armored steel tape arranged on the outer side of the aluminum strip layer; a silicon carbide and mineral composite packing material is arranged in a gap between the core wire and the aluminum strip layer; a polyethylene inner sheath is arranged between the aluminum strip layer and the armored steel tape; and a polyethylene outer sheath is arranged on the outer side of the armored steel tape. The power cable has the advantages of good heat-dissipating capability, long service life, high flame retardance and fire resistance, power conservation, no toxin and environmental protection.
Description
Technical field
The utility model relates to a kind of power cable, specifically fireproofing and heat resistant environmental-friendly power cable.
Background technology
Existing fire-retardant category-A all adopts glass fiber to fill, and is well-known, and the interior external insulation of temperature that temperature rise that the transmission capacity of cable is produced when being decided by the conductor transmission current and conductor outer insulating material can bear for a long time and cable is the ability of medium distribute heat towards periphery.Traditional 8.7/10kV twisted polyethylene cable is three core round insulations, what fill between its core is the glass fiber filling of high thermal resistance, the external heat radiation utmost point of three-phase conductive cores has some setbacks, greatly the heat of part can only distribute towards periphery by the circumscribed edge of shielding copper strips and oversheath, because the effective section that distributes is narrow, so thermal resistance value is very big.Glass fiber is filled to cable direct labor and site operation personnel and is brought very big trouble, the workshop workman is flown upward in the full workshop of glass fiber when doing glass fiber filling stranding, get on the skin not only pain but also itch and can not take out, workman's occupational health will be had a strong impact on, and not environmental protection, glass fiber is filled the fire retardancy that has only satisfied cable, and is more harm than good.Inside and outside protect and all adopt common polyvinyl chloride, chlorine is wherein arranged, poison very big, a large amount of pernicious gas that in factory's extrusion process, wafing, these gases cause bigger harm to human body.
The utility model content
The utility model purpose: at the existing problem and shortage of above-mentioned existing longitudinal cable connector, the purpose of this utility model provides that a kind of perfect heat-dissipating, long service life, flame-retardant ability are strong, the power cable of power saving, asepsis environment-protecting.
Technical scheme: in order to solve the problems of the technologies described above, the technical scheme that the utility model adopted is a kind of fireproofing and heat resistant environmental-friendly power cable, comprise heart yearn, wrapped aluminium strip layer, be provided with steel-tape armouring in the aluminium strip layer outside in the heart yearn outside, wherein the gap between heart yearn and aluminium strip layer is provided with carborundum mineral composite filler, between aluminium strip layer and steel-tape armouring, be provided with the polyethylene inner sheath, be provided with the polyethylene oversheath in the steel-tape armouring outside.
Described heart yearn comprises conductor, wrapped insulating barrier and wrapped copper strips screen at surface of insulating layer at conductive surface.
Described polyethylene inner sheath is wrapped or be extruded in the aluminium strip laminar surface.
Described polyethylene oversheath is wrapped on the steel-tape armouring surface.
Described conductor is by many stranded the forming of copper cash.
After the utility model adopts the existing glass fiber of the composite filled replacement of carborundum mineral to fill use, the heat of its conductor can be more equably to around distribute, the thermal resistivity of filling is low, it is big to distribute area, so replace the fiberglass type of traditional high thermal resistance to fill with the packing material of low thermal resistance.Except that the reduction of conductor wire core temperature has reduced line loss and plays the energy-conservation effect, also prolonged the useful life of cable insulation and sheath, because the aging life-span of organic material and its working temperature just are closely bound up.
Beneficial effect: the interior external insulation of temperature that temperature rise that is produced when 1, efficiently solving the conductor transmission current with carborundum is mineral-filled and conductor outer insulating material can bear for a long time and cable is the ability of medium distribute heat towards periphery.The heat that conductor produces has copper strips, and carborundum is mineral-filled, and wrapped aluminium strip outwards distributes together.Improved the useful life of the ampacity and the cable of cable so greatly.2, replaced the conventional method that fire-retardant A type power cable adopts glass fiber to fill for a long time.With the mineral-filled not only environmental protection of carborundum but also improved the ability of the flame-retardant of cable.Improved the ampacity of cable again more effectively, for country saves electric power.3, interior oversheath all adopts the polythene material of environment-protecting asepsis type.4, raw materials consumption, owing to used the carborundum of low thermal resistance mineral-filled, and conductor wire core all adopts circular configuration, so the outside diameter of cable increases to some extent than traditional structure, general 3～the 6mm that increases, the increase that certain external diameter increase can bring material cost and cable weight, because the carborundum of using is mineral-filled for environmental protection utilizes product, its advantage is apparent.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiment only be used to the utility model is described and be not used in the restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present utility model.
As shown in the figure, a kind of fireproofing and heat resistant environmental-friendly power cable, comprise many heart yearns 1 and Duo Gen carborundum mineral composite filler 6, heart yearn 1 is made of the many stranded conductors that form 7 of copper cash, wrapped insulating barrier 8 and wrapped copper strips screen 9 on insulating barrier 8 surfaces on conductor 7 surfaces, with heart yearn 1 and carborundum mineral composite filler 6 bundle together, at its wrapped aluminium strip layer 2 in outside, wrapped or extrude polyethylene inner sheath 3 on aluminium strip layer 2 surface, follow surperficial wrapped steel-tape armouring 4, at last at the wrapped polyethylene oversheath 5 in steel-tape armouring 4 outsides at polyethylene inner sheath 3.
Typical structure as midium voltage cable: copper conductor, inner shield, insulation, external shield, copper strips shielding, alternate filling and oversheath (PVC), wherein " filling " is after unique the change cable electrical property, mechanical performance to be influenced minimum link---the function that is filled in the cable just keeps the profile of cable and externally conducts distribute heat, not much else, so usually despised and do not have and see by the people.Actually this is not so, and transmittability size that the selecting for use of cable filler will have a strong impact on cable and rated current are with the loss in the uiform section conductor.Zhongyue Cable Technology Co., Ltd., Shanghai and No.10 Branch, Shanghai Electric Cable Factory divide three groups of common six roots of sensation cables to make following contrast test with regard to 0.6/1kv～8.7/10kV, see Table 1.
Table 1 cable sample model and specification
Numbering 2 and 4 is traditional structure in the above-mentioned six roots of sensation cable sample, conductor is copper fan-shaped, with its corresponding No. 1 and No. 3 samples is consistent on cross-sectional area of conductor, be 4*70 and 3*120+70, the conductor shape of new construction is made into the mineral material of low thermal resistance by original glass fibre for circular and alternate packing material; No. 5 and No. 6 is the test group of 8.7/10kV level, its cross-sectional area of conductor, shape, insulation material and thickness, shielding and copper strips, oversheath material and thickness, the two is all identical one by one, difference be No. 5 for mineral-filled, No. 6 be traditional glass fibre filling.Test divides two steps to carry out, the first of test is No. 1 and No. 2, No. 3 and No. 4, No. 5 identical with No. 6 three groups of specification cross sections, model is filled each phase conductor series connection of different a pair of samples, and externally pass to constant electric current (method of testing is calculated built on stilts cabling cross section ampacity according to the IEC60287 standard) under the condition of ambient temperature unanimity, record result such as table 2.The second step test method is: ambient temperature is constant in 40 ℃, and the conductor temperature of 6 cables of three groups of samples is controlled under 90 ℃ of conditions, surveys the steady-state current value of its conductor, sees table 3 for details.
Table 2
Table 3
Above test report value provides by Shanghai Electrical Cable Research Institute, and its test report No is that 2004 cables grind the examination word No. 040342.
From above-mentioned test report can draw following some:
1) replace fibrous type to fill with the mineral substance filling material of low thermal resistance after, ability of its conduction heat obviously increases, this can obtain from the data of table 2: old structure conductor (second contrast groups) temperature height (105 ℃) but jacket surface temperature low (77.3 ℃); New construction conductor temperature low (90 ℃), but jacket surface temperature high (78.8 ℃).Under the identical condition in cable conductor cross section, the ampacity of its contrast groups promotes 8.7%, 10.2% and 22.8% respectively.
2) percentage that promotes from ampacity as can be seen the effect of medium pressure grade 8.7/10kV obviously be better than the 0.6/1kV electric pressure, its reason also is conspicuous: traditional 8.7/10kV twisted polyethylene cable is three core round insulations, what fill between its core is that the glass fibre or the polypropylene of high thermal resistance torn rope, the external heat radiation utmost point of three-phase conductive cores has some setbacks, greatly the heat of part can only distribute towards periphery by the circumscribed edge of shielding copper strips and oversheath, because the effective section that distributes is narrow, so thermal resistance value is very big; After replacing with the mineral material of low thermal resistance, the heat of its conductive cores can be more equably to around distribute, the thermal resistivity of filling is low, it is big to distribute area, the stack of the two advantage makes the current capacity of core bring up to 122.8% and also just has been appreciated that.0.6/1kV level low-voltage cable, no matter be four-core uiform section or 3+1 core, conductor shape encloses integrated circle by fan-shaped core substantially, loading between core insulation is just very little originally, former packing material with low thermal resistance replaces the fibrous type of traditional high thermal resistance to fill increasing progressively of its radiating effect does not just have midium voltage cable so obvious, although numerically still have 8～10% increment, but have here considerable part be rely on the conduction insulated wire cores by fan-shaped become circle after, the conductor radiating surface becomes multicore circumference sum by fan-shaped cambered surface sum, the cause of the increase of its heat exchange interface (alternate filling low thermal resistance mineral material).
3) press in the middle of the 8.7/10kV system use instead low thermal resistance mineral-filled after, when its current-carrying value still maintains original load current value 264 (A), its conductor wire core temperature has only 66 ℃, the surface temperature of oversheath only is 56 ℃, all be significantly less than 90 ℃ and 62 ℃ of traditional same specification structure, the line loss the when relation that is directly proportional with temperature according to the resistance coefficient of copper conductor can be released 66 ℃ only is 93% of 90 ℃ of line losses.This conclusion remains into ground current positive effect is arranged for the under construction and city overhead wire of power plant.
4) play the energy-conservation effect except that the reduction of conductor wire core temperature has reduced line loss, also prolonged the useful life of cable insulation and sheath, because the aging life-span of organic material and its working temperature just are closely bound up.
5) owing to used the mineral-filled of low thermal resistance, and conductor wire core all adopts circular configuration, so the outside diameter of cable increases to some extent than traditional structure, general 3～the 6mm that increases, the increase that certain external diameter increase can bring material cost and cable weight, owing to the mineral material with structure applications is that environmental protection utilizes product, so comparing with the common flame retardant cable of same specification, material cost only increases by 1～1.5%, weight will increase by 3～8%.As for cable hardness with crooked lay radius for the cable that fixedly lays usefulness, medium voltage network cable no significant difference also particularly can be regarded as and is equal to.
Comprehensive above advantages and disadvantages, draw as drawing a conclusion: adopting the mineral matter of low thermal resistance to replace fiber-based material in the midium voltage cable structure is feasible as being filled on the manufacturing process, on the technical performance parameter, (increase transmission capacity and reduce line loss, the aspect increases the service life) be remarkable (fire retardancy of new construction all can reach category-A and more than, relevantly in the second phase in 2002 " classification of flame retardant cable and select for use ", done to introduce) with the cable-flame retardant ability after mineral-filled { popular electricity consumption }, be reasonably on Financial cost, on the sale price, have competitiveness.Therefore the mineral material with the low thermal resistance high flame retardant replaces traditional glass fibre or polypropylene to tear the theory of rope for increasing substantially midium voltage cable transmission integration capability, a kind of effective and safe desirable new way of can yet be regarded as.
Claims (5)
1. fireproofing and heat resistant environmental-friendly power cable, comprise heart yearn (1), wrapped aluminium strip layer (2), be provided with steel-tape armouring (4) in aluminium strip layer (2) outside in heart yearn (1) outside, it is characterized in that: the gap between heart yearn (1) and aluminium strip layer (2) is provided with carborundum mineral composite filler (6), between aluminium strip layer (2) and steel-tape armouring (4), be provided with polyethylene inner sheath (3), be provided with polyethylene oversheath (5) in steel-tape armouring (4) outside.
2. according to the described fireproofing and heat resistant environmental-friendly power cable of claim 1, it is characterized in that: described heart yearn (1) comprises conductor (7), wrapped insulating barrier (8) and wrapped copper strips screen (9) on insulating barrier (8) surface on conductor (7) surface.
3. according to the described fireproofing and heat resistant environmental-friendly power cable of claim 1, it is characterized in that: described polyethylene inner sheath (3) is wrapped or be extruded in aluminium strip layer (2) surface.
4. according to the described fireproofing and heat resistant environmental-friendly power cable of claim 1, it is characterized in that: described polyethylene oversheath (5) is wrapped on steel-tape armouring (4) surface.
5. according to the described fireproofing and heat resistant environmental-friendly power cable of claim 2, it is characterized in that: described conductor (7) is by many stranded the forming of copper cash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201973335U CN201773638U (en) | 2010-05-20 | 2010-05-20 | Fireproof, heat-proof and environment-friendly power cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201973335U CN201773638U (en) | 2010-05-20 | 2010-05-20 | Fireproof, heat-proof and environment-friendly power cable |
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| CN201773638U true CN201773638U (en) | 2011-03-23 |
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| CN2010201973335U Expired - Lifetime CN201773638U (en) | 2010-05-20 | 2010-05-20 | Fireproof, heat-proof and environment-friendly power cable |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834029A (en) * | 2010-05-20 | 2010-09-15 | 无锡市黄浦电线电缆有限公司 | Fireproofing and heat resistant environmental-friendly power cable |
| CN103871644A (en) * | 2014-02-27 | 2014-06-18 | 新宇电缆集团股份有限公司 | Cold-resistant and high-temperature resistant control cable |
| CN103871660A (en) * | 2014-02-25 | 2014-06-18 | 安徽华成电缆有限公司 | Multi-core flat copper conductor armor current guide power cable |
| CN104835585A (en) * | 2014-02-12 | 2015-08-12 | 安徽国华电缆集团有限公司 | Flat aluminum alloy conductor core cable |
| CN105895212A (en) * | 2016-07-01 | 2016-08-24 | 江苏珠影特种电缆有限公司 | Cross-linked polyethylene insulated multi-core coaxial power cable |
| CN108922685A (en) * | 2018-07-18 | 2018-11-30 | 王迅 | A kind of flame retardant type power cable |
-
2010
- 2010-05-20 CN CN2010201973335U patent/CN201773638U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834029A (en) * | 2010-05-20 | 2010-09-15 | 无锡市黄浦电线电缆有限公司 | Fireproofing and heat resistant environmental-friendly power cable |
| CN101834029B (en) * | 2010-05-20 | 2012-07-11 | 无锡市黄浦电线电缆有限公司 | Fireproofing and heat resistant environmental-friendly power cable |
| CN104835585A (en) * | 2014-02-12 | 2015-08-12 | 安徽国华电缆集团有限公司 | Flat aluminum alloy conductor core cable |
| CN103871660A (en) * | 2014-02-25 | 2014-06-18 | 安徽华成电缆有限公司 | Multi-core flat copper conductor armor current guide power cable |
| CN103871644A (en) * | 2014-02-27 | 2014-06-18 | 新宇电缆集团股份有限公司 | Cold-resistant and high-temperature resistant control cable |
| CN105895212A (en) * | 2016-07-01 | 2016-08-24 | 江苏珠影特种电缆有限公司 | Cross-linked polyethylene insulated multi-core coaxial power cable |
| CN108922685A (en) * | 2018-07-18 | 2018-11-30 | 王迅 | A kind of flame retardant type power cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110323 Effective date of abandoning: 20120711 |