CN2901506Y - Composite conductor multicore wire cable of inner layer as copper cladded aluminum and external as pure copper - Google Patents
Composite conductor multicore wire cable of inner layer as copper cladded aluminum and external as pure copper Download PDFInfo
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- CN2901506Y CN2901506Y CN 200620103421 CN200620103421U CN2901506Y CN 2901506 Y CN2901506 Y CN 2901506Y CN 200620103421 CN200620103421 CN 200620103421 CN 200620103421 U CN200620103421 U CN 200620103421U CN 2901506 Y CN2901506 Y CN 2901506Y
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Abstract
A composite conductor multi-core electric wire cable whose inner layer is copper-clad aluminum and outer layer is pure copper comprises an insulating layer 3, a copper-clad aluminum conductor 2 as conductor center in the insulating layer 3, a copper conductor 1 as neighboring outer layer and outer layer of the copper-clad aluminum conductor 2, a non-woven 4 wrapping the package of many insulated wire cores, a inner casing 5 outside the non-woven 4, an armor 6 outside the inner casing 5 and a casing 7 outside the armor 6. The conductor DC resistance can completely conform to the product standard of the conductor DC resistance need and meet the operation need of the current-carrying capacity of the electric cable.
Description
One, affiliated technical field
The utility model relates to a kind of electric wire, refers in particular to a kind of composite conductor electric wire.
Two, background technology
Conductor is the most basic requisite main member that the electric wire product carries out electric current or electromagnetic wave information transfer function.Metal material such as copper, aluminium electric conductivity is good, and therefore, electric wire all adopts copper, aluminium as conductor material at present.The electric wire manufacturing is the industry of material fine finishining and assembling.The one, material usage is huge, and the Master Cost in the cable products will account for the 70-90% of total manufacturing cost; The 2nd, the classification of material therefor, kind are very many, and performance requirement is high especially, as conductor copper, require the purity of copper will be more than 99.95%, and the product that has will adopt the anaerobic high purity copper; And conductor material has accounted for 70～80% of whole cable material cost.World's copper valency continuous rise has reached 53220 yuan/ton at present in recent years, and the ratio that causes copper conductor material to account for total material cost rises to 80～95%.The cables manufacturing cost is high, and it is imperative to adopt new material to substitute fine copper.
Three, utility model content
It is that the copper cover aluminum skin is the composite conductor multiple core cord cable of fine copper that the purpose of this utility model is to provide a kind of internal layer, the D.C. resistance of conductor can meet the requirement of the domestic and international at present product standard that adopts to conductor DC resistance fully, external diameter is less than the outside dimension upper limit of existing same specification conductor, solve fine copper alclad conductor diameter and substantially exceeded the deficiency that has the conductor upper limit now, be convenient to design, use and install, and make the ampacity of cable that a bigger raising be arranged.
For achieving the above object, the solution that the utility model is taked is: a kind of internal layer is that the copper cover aluminum skin is the composite conductor multiple core cord cable of fine copper, it comprises insulating barrier, the insulating barrier conductor center is a copper clad aluminum conductor, adjacent skin of copper clad aluminum conductor and skin are copper conductor, and bag is with nonwoven fabrics behind a plurality of insulated wire cores strandings, and nonwoven fabrics is outward an inner sheath, inner sheath has armouring outward, and armouring is outward a sheath.
Adopt the copper composite conductor, not only favourable to kelvin effect, also the Wiring nose to cable presses, soldering is connected to profit, avoid in long-term use burn into damage or because of press, soldering connects badly makes conductor and Wiring nose loose contact, generate heat cause that the copper pull-up falls and two kinds of metals of copper aluminium between form electrical potential difference, quicken couple corrosion, the hidden danger that causes cable end to burn.
Adopt structure of the present invention, could really become the electric wire of copper removal in the world today, two kinds of conductors of aluminium the third conductor in addition.
The utility model has the advantages that:
1, dc resistivity: the resistivity of copper-clad aluminum conductor is bigger than pure copper wire, is about 1.5 times of pure copper wire, and when resistance was identical, copper-clad aluminum conductor weight was about 1/2 of pure copper wire.Calculate according to kelvin effect, when the above high frequency of 5MHz, resistivity is identical with pure copper wire.In other use occasions, by taking to improve the volume and the corresponding technological measure of copper in the copper cover aluminum monofilament, make the copper composite conductor in the outside dimension upper limit of existing same specification conductor, satisfy the conductor DC resistance requirement.
2, adopt the copper composite conductor, can satisfy the custom of present continuity electric wire for many years at aspects such as product type selecting, design, use, installations, simultaneously, if use copper clad aluminum conductor merely, it is a lot of to make the external diameter of cable conductor go out original conductor diameter greatly, give to use to install and bring a lot of inconvenience, and use copper composite conductor, can be controlled in the maximum range of in GB/T3956-1997 " conductor of the cable " standard conductor diameter being stipulated, both reduce conductor diameter, and can satisfy existing use habit again.
3, in light weight: the proportion of copper-clad aluminum conductor only is the 37%-40% of pure copper wire, and under online footpath, the equiponderant situation, its length is 2.5 times of pure copper wire, greatly reduces production cost thus, buys 1 ton of copper-clad aluminum conductor and is equivalent to buy 2.5 tons of pure copper wires; Use the 1000kg copper-clad aluminum conductor and use 2500kg fine copper bare wire to compare cost-saved about 70000 yuan (53.2 yuan/kg * 1000kg * 2.5 times-63 yuan/kg * 1000kg=70000 units).So, using copper-clad aluminum conductor instead of pure copper cash, cost significantly can save material.It is the ideal product of instead of pure copper conductor.Adopt the copper composite conductor, can partly replace fine copper, also have good economic benefits.
4, reduce AC resistance:
(1) AC resistance is the main foundation of ampacity, principle according to kelvin effect, the surface of solid conductor, it is big that the electric current that the center of circle unit are of the current ratio lead that its unit are is passed through is passed through is wanted, that is to say that the center of circle of large size conductor is in the area of a circle that same conductor is formed, the center of circle is littler than the electric current that circumference passes through, and is the most reasonable, most economical so center of circle conductor is formed with different metals with the circumference conductor.
(2) influence the AC resistance index except that D.C. resistance, kelvin effect, also have proximity effect, compare with the copper conductor of identical D.C. resistance, behind the employing copper composite conductor, in single conductor, aluminium is at the garden heart, and copper is in outer rim; In stranded conductor, internal layer is a copper cover aluminum, skin is a fine copper, and aluminium does not all have the copper sensitivity to kelvin effect and proximity effect, and the copper composite conductor can make the conductor total cross section increase a part simultaneously, therefore also increased the surface area of copper, improved the radiating condition of cable, increased area of dissipation, and the conductive coefficient of aluminium and copper are close, under equal material cost condition, it is much economical that the index of AC resistance is wanted.
5, have good anti-corrosion, aluminum ratio copper is perishable, but because copper clad aluminum material metallurgyization fully, aluminium is coated by copper fully, can not contacted by water, air, does not reach fully and coppery performance.
6, copper and aluminium all are nonmagnetic substances, need also can not produce eddy current every magnetic.
7, copper cover aluminum is compared with copper, and is in light weight, and line matter softness is easy to processing, convenient transportation.
8, cost is low, compares with the copper core cable of constructed index, saves cost 20% approximately.
9, the tensile strength of fine aluminium is than copper difference, but adopts copper cover aluminum/copper composite conductor and technologic improvement, can to the conductor that uses copper clad aluminum material fully mechanical strength and resistance to bend(ing) can aspect deficiency improve.
10. good weldability: copper-clad aluminum conductor since its concentric coating in surface one deck fine copper, therefore have convenient production with the same solderability of pure copper wire.
The copper composite conductor is compared than pure cu conductor, except that all technical indicators that possess pure cu conductor, also has in light weightly, is convenient to make, transportation, installs, and greatly reduces the cost of cable.
China uses copper first big country (surpassing the U.S. and Japan) in the world, and the cable output of China is the first in the world.In recent years, the ratio of using copper conductor cable and aluminium conductor cable became present 8: 2 by 2: 8 before 10 years, and the Chinese copper degree of self-sufficiency only reaches 50%.Consume 3,000,000 tons of calculating of copper according to present Chinese cable, promote the use of this technology, make the cable of this conductor structure account for 50% of whole cable market, cost-saved nearly 30,000,000,000 yuan, not only can bring direct economic benefit, the more important thing is the copper consumption in the meeting remote-effects whole nation and even the world, reduce the copper import volume of China, can make the forward price drop of copper.
Four, description of drawings
Fig. 1 is the structural representation of present embodiment (three-plus-one core).
Fig. 2 is kelvin effect and proximity effect schematic diagram.
Among the figure: 1, copper conductor, 2, copper clad aluminum conductor, 3, insulating barrier, 4, nonwoven fabrics, 5, inner sheath, 6, armouring, 7, sheath.
Five, embodiment
Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.
Referring to Fig. 1, a kind of internal layer is that the copper cover aluminum skin is the composite conductor multiple core cord cable of fine copper, it comprises insulating barrier 3, insulating barrier 3 conductor center are copper clad aluminum conductor 2, copper clad aluminum conductor 2 adjacent skins and skin are copper conductor 1, and bag is inner sheath 5 with nonwoven fabrics 4 outside the nonwoven fabrics 4 behind a plurality of insulated wire cores strandings, having armouring 6 outside the inner sheath 5, is sheath 7 outside the armouring 6.
As shown in Figure 2, direct current can distribute as even in conductor, and has set up equally distributed electromagnetic field outside conductor, and under the interchange situation, electric current then concentrates on conductive surface and flows, the conductor center, and current density is very little, claims kelvin effect.
As can be seen from Fig. 2, during △ I left-hand increment, magnetic flux usefulness * expression increases in order to stop magnetic flux, has just set up reverse current I
1, this electric current is that the conductive surface electric current increases variation, has just set up reverse current I
2, this electric current still makes the conductive surface electric current increase, and conductor center electric current reduces, and to small bore cable kelvin effect and not serious, to electric cable with large cross-section, just must take the milliken conductor structure.Proximity effect be since in the three-phase conductor electric current not homophase, positive and negative directional current the effect of attracting each other is arranged because the three-core cable distance between conductors is very near, make the factor of AC resistance increase with regard to considering proximity effect.
The calculating of skin effect coefficient: see Table 1 as YJV 8.7/10kV cable there being related parameter bring calculating into.
The calculating of table 1 skin effect coefficient
| Cross-sectional area of conductor mm 2 | Below 25 | ?35 | ?50 | ?300 | ?400 | ?500 | ?630 | |
| Skin effect coefficient (Ys) | Copper | 0.0001 | ?0.0002 | ?0.0003 | ?0.0135 | ?0.0225 | ?0.0367 | ?0.0601 |
| Aluminium | 0.0000 | ?0.0001 | ?0.0001 | ?0.0050 | ?0.0082 | ?0.0135 | ?0.0223 | |
From table 1 as seen, copper, aluminium cable 25mm
2And during following cross-sectional area of conductor, skin effect coefficient y
s0.0001 and below, and ten thousand/below, should ignore, the cross-section of cable reaches 630mm
2The time, y
sReached 6% (copper) and 2.2% (aluminium), very big to copper conductor, so 500mm
2And above copper conductor preferably adopts milliken conductor.
The calculating of proximity effect coefficient: see Table 2 as 8.7/10kV there being related parameter bring calculating into
The calculating of table 2 8.7/10kV proximity effect coefficient
| Cross-sectional area of conductor mm 2 | Below 25 | ?35 | ?50 | ?300 | ?400 | ?500 | ?630 | |
| Three-core cable proximity effect coefficient (Ys) | Copper | 0.000 0 | ?0.0001 | ?0.0001 | ?0.0140 | ?0.0251 | ?0.0431 | ?0.0735 |
| Aluminium | 0.000 0 | ?0.0001 | ?0.0001 | ?0.0051 | ?0.0094 | ?0.0166 | ?0.0293 | |
As seen, the proximity effect of three-core cable is bigger from table 2, but to 25mm
2And can ignore with lower conductor, to 630mm
2The proximity effect of three core copper conductor cables is up to 7.35%, and the aluminium core is quite a lot of, so three-core cable is big owing to proximity effect, AC resistance is just big than single-core cable.
It can also be seen that from table 1 and table 2, except that the heavy in section has a significant impact kelvin effect and proximity effect, aluminium is littler than copper to the influence of kelvin effect and proximity effect, therefore, adopt internal layer as herein described to be copper cover aluminum or copper covered steel, outerly to be the composite conductor electric wire of fine copper, be most preferred method (all adopting copper or aluminium at present both at home and abroad), and under the situation that D.C. resistance equates, its AC resistance, current-carrying capacity of cable are better than the index of the cable of fine copper, fine aluminium conductor structure, economical.
Also be not difficult to find out simultaneously, in the cross section greater than 70mm
2Three cores and above multicore cable in, advise that domestic designing institute, large electricity consumer (power supply administration) should adopt many of single-core cables to lay, it will improve current-carrying capacity of cable greatly, and help manufacturer the joint length of single-core cable is increased, make the length cable not want transition joint, both saved outdoor transition joint expense, reduced again because the accident potential that joint causes also helps installing.Non-ferrous metal significantly appreciate current, adopts the production cost of three single-core cables and a three-core cable not only not increase, slightly reduction has on the contrary but increased the ampacity of cable widely.For example: YJV 10kV 3 * 1 * 300mm
2The ampacity that lays in air is than YJV 10kV 3 * 300mm
2Want big more than 29%; YJV 0.6/1kV3 * 1 * 240mm
2The ampacity that lays in air is than YJV 0.6/1kV 3 * 240mm
2Want big more than 25%.
Claims (1)
1, a kind of internal layer is that the copper cover aluminum skin is the composite conductor multiple core cord cable of fine copper, it comprises insulating barrier (3), it is characterized in that: insulating barrier (3) conductor center is copper clad aluminum conductor (2), adjacent skin of copper clad aluminum conductor (2) and skin are copper conductor (1), bag is with nonwoven fabrics (4) behind a plurality of insulated wire cores strandings, nonwoven fabrics (4) is outer to be inner sheath (5), has armouring (6) outside the inner sheath (5), and armouring (6) is outer to be sheath (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620103421 CN2901506Y (en) | 2006-05-02 | 2006-05-02 | Composite conductor multicore wire cable of inner layer as copper cladded aluminum and external as pure copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620103421 CN2901506Y (en) | 2006-05-02 | 2006-05-02 | Composite conductor multicore wire cable of inner layer as copper cladded aluminum and external as pure copper |
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| Publication Number | Publication Date |
|---|---|
| CN2901506Y true CN2901506Y (en) | 2007-05-16 |
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| CN 200620103421 Expired - Fee Related CN2901506Y (en) | 2006-05-02 | 2006-05-02 | Composite conductor multicore wire cable of inner layer as copper cladded aluminum and external as pure copper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930815A (en) * | 2010-09-14 | 2010-12-29 | 湖南金杯电缆有限公司 | Environmental-friendly bimetallic conductor core power cable |
-
2006
- 2006-05-02 CN CN 200620103421 patent/CN2901506Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930815A (en) * | 2010-09-14 | 2010-12-29 | 湖南金杯电缆有限公司 | Environmental-friendly bimetallic conductor core power cable |
| CN101930815B (en) * | 2010-09-14 | 2013-08-14 | 湖南金杯电缆有限公司 | Bimetallic conductor core power cable |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070516 Termination date: 20100502 |