CN204215742U - A kind of multilayer super-huge cross section milliken conductor - Google Patents
A kind of multilayer super-huge cross section milliken conductor Download PDFInfo
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- CN204215742U CN204215742U CN201420710353.6U CN201420710353U CN204215742U CN 204215742 U CN204215742 U CN 204215742U CN 201420710353 U CN201420710353 U CN 201420710353U CN 204215742 U CN204215742 U CN 204215742U
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Abstract
The utility model discloses a kind of multilayer super-huge cross section milliken conductor, this conductor is composite type milliken conductor structure; This structure by center filling plastic bar, be separately positioned on the inside and outside single line layer outside filling plastic bar and the two-layer conductor stock block layer that is at least be arranged on outside outer single line layer forms; Also be provided with the insulation crimped paper of isolation between each layer there.The utility model adopts a kind of self supporting structure, Stability Analysis of Structures, very close to each other between conductor single line, without the need to pressing, can meet between conductor single line and connecting requirement more closely; " Z " type or the segmentation corrugated type conductor stock block of tile-type conductor single line self supporting structure to the set of inside tighten effect, also without the need to adopting other bands to tighten, Stability Analysis of Structures, can not loose, displacement, displacement, the roundness of whole milliken conductor periphery is high.
Description
Technical field
The utility model relates to cable conductor field, specifically a kind of multilayer super-huge cross section milliken conductor.
Background technology
Along with the further quickening of the quick growth of China's economic and industrialization, Development of China's Urbanization, day by day improve the construction requirements of the infrastructure such as urban distribution network, city, developed regions and provincial capital require that urban central zone uses underground power cable electric energy transmitting one after another.Meanwhile, electric power is prerequisite and the basis of the national economic development, and along with the fast development of national economy, electricity needs increases severely, and net capacity increases suddenly, and power of motor increases, and electric power facility develops towards Large Copacity (high voltage, big current, high frequency) transmission direction.In order to improve the ampacity of cable, usually adopt the way increasing cross-sectional area of conductor.
The D.C. resistance of conductor is an important parameter of examination cable electrical property.But for exchanging the electric cable with large cross-section of transmission, due to the existence of kelvin effect, current density in conductor is not be uniformly distributed, but reduce gradually to center along cable conductor is radial on surface, the ampacity in conductor is caused to be not increase with cable conductor cross section and increase in direct ratio, but when conductor diameter increases to a certain degree, kelvin effect is serious, conductor in alternating electromotive force circuit is caused to produce loss and the effective resistance that generates heat and AC resistance obviously can be greater than its D.C. resistance, external diameter is larger, kelvin effect is more obvious, the ratio causing AC resistance to increase is also larger, depend merely on increasing section and also just lose its practicality and economy.
In order to alleviate the conductor AC resistance increase because kelvin effect causes to greatest extent, effectively reduce the loss heating of conductor, increase the ampacity of conductor, people have to large size conductor to be carried out in a different manner division processing becomes the conductor be made up of the independent sector of several mutually insulated, the overall dimension of each part obviously reduces, to reach the object reducing AC resistance.Often power cable with cross-linked polyethylene insulation copper core conductor is made milliken conductor in power cable industry, generally there are several structures such as four segmentations, five segmentations, six segmentations and seven segmentations, split share block also has the shapes such as fan-shaped and corrugated, in the majority with five segmentation sector elements.Sectional area due to single sector element only have conductor total sectional area some/mono-, so " kelvin effect " and " proximity effect " of single stock block reduces greatly, thus reach the object reducing conductor AC resistance.As in GB/T11017 and GB/Z 18890, with 800mm
2as watershed: 800mm
2following cable conductor adopts routine to press stranded arrangement architecture form; 800mm
2and above cable conductor adopts the version of the stranded arrangement of five milliken conductor strandings.This form comprises five sizes copper core stock block all identical with cross sectional shape, by these five copper core stock blocks twist stranding in certain direction, described big section copper core five milliken conductor also comprises the insulation crimped paper being arranged between this copper core stock block, being kept apart by each stock block, and is wrapped in the semiconductive nylon tape of this copper core stock block periphery.By big section copper core wire is broken the whole up into parts, original copper core sectional uniform is divided into the stock block that five mutually isolated, thus the adverse effect of " kelvin effect " and " approach effect " is dropped to bottom line, substantially increase the transmission capacity of wire.
The mode of this sector element milliken conductor of prior art, is mainly applicable to middle uiform section 800-1800mm', has good segmentation effect.But for more heavy in section, due to fan-shaped height and fan-shaped wide be greater than 2 times the depth of penetration (kelvin effect be due to field amount formed in the decay of conductor, the field decay speed of amount in conductor can represent with saturating people degree of depth d), thus segmentation effect is just no longer obvious.Simultaneously, also there is an a lot of difficult problem and drawback in process of production in the mode of this milliken conductor: one be sector conductor stock block cross section excessive time, producting process difficulty increases, the characteristic requirements of moulds of industrial equipment, equipment, and the stability of conductor structure and flexural property etc. all cannot meet the demands; Two is that power cable often wants conductor to adopt compact conductor, to improve the activity coefficient of wire, reduced outside diameter, reduces gap between conductor, prevents moisture from infiltrating; Making to connect between conductor tightr, avoid and loosen some caused problems. contact-making surface increases electric conductivity, and to strengthen the heating resistor avoiding loose contact to cause large etc.; And sector conductor stock block is fan-shaped pressing, the shape of every layer is different, and when stock block cross section is excessive, the difficulty of pressing increases.Three is that insulating paper between sector conductor stock block can not bear distortion, and adding man-hour conductor must become the insulated wire having pretwist by first pretwist shaping bag again paper, then goes to gather.Each sector conductor stock block will keep prototype, can not bear the impact that set is reversed, also will adopt pretwist conductor.Pretwist conductor because existing pretwist lay, therefore is easy to synthesis on set is shaped, but relative tightness also can be caused not good enough.When twisted wire pretwist must lay suitably and accurately and evenly, otherwise to occur in the set shaping unfavorable condition that has been bound to, and loose, displacement, displacement are also the problems often had.Because above-mentioned reason, sector conductor stock set of blocks usually needs after being shaped to adopt metal tape (as steel band, bronze band etc.) or other bands to tighten, but this mode tightened, add production cost, surface is out-of-flatness also, also makes the pliability of conductor reduce, easily produces gap when conductor bends between conductor and screen, reduce insulation property, sheet metal strip also can cause electric field uneven, increase line loss.
In order to increase cross-sectional area of conductor, a kind of improvement of prior art is the milliken conductor structure adopting hollow, comprise the helix tube of support, at outer stranded four segmentations of the helix tube of support, five segmentations, six segmentations and the seven corrugated type conductor stock blocks split, the helix tube of the hollow milliken conductor support of this structure is in order to ensure that certain intensity often adopts metallic coil (as stainless steel helix tube, bronze helix tube etc.), different metal materials, can increase line loss, causes electric field uneven.Even if adopt identical material, also can produce gap between helix tube and milliken conductor stock block, loose contact causes heating resistor large.And adopting the copper pipe etc. of the materials such as drawing pipe or plastics, pliability is low, and the pliability of whole conductor can be caused to reduce.Although this technology at utmost make use of cross-sectional area of conductor, the adverse effect reducing " kelvin effect " by a larger margin simultaneously, the effect reducing AC resistance is still limited.Hollow is excessive, artificially increases the outside diameter of cable, and cost increases; Hollow is too small, cannot support stranded corrugated type conductor stock block, easily flatten hollow structure time stranded.
Utility model content
The utility model is in order to solve problems of the prior art, and provide a kind of producting process difficulty and reduce, it is large to press coefficient, tightness is large, Stability Analysis of Structures, makes full use of conductor area, at utmost reduces kelvin effect, improves the super-huge cross section milliken conductor of ampacity.
The super-huge cross section of a kind of multilayer described in the utility model milliken conductor, this conductor is composite type milliken conductor structure; This structure by center filling plastic bar, be separately positioned on the inside and outside single line layer outside filling plastic bar and the two-layer conductor stock block layer that is at least be arranged on outside outer single line layer forms; Also be provided with the insulation crimped paper of isolation between each layer there.
Further improvement, described interior single line layer can be circular single line layer, tile-type single line layer or Z-type single line layer.
Further improvement, described outer single line layer can be circular single line layer, tile-type single line layer or Z-type single line layer.
Further improvement, described conductor stock block layer is two-layer, comprises the first conductor stock block layer and the second conductor stock block layer be arranged on outside the first conductor stock block layer.
Further improvement, the first described conductor stock block layer can be tile-type conductor stock block layer or Z-type conductor stock block layer.
Further improvement, the second described conductor stock block layer can be by tile-type conductor stock block layer or Z-type conductor stock block layer.
Further improvement, described conductor stock block layer is three layers, comprises the first conductor stock block layer and the second conductor stock block layer, the 3rd conductor stock block layer that are successively set on outside the first conductor stock block layer.
Further improvement, the 3rd described conductor stock block layer can be by tile-type conductor stock block layer or Z-type conductor stock block layer.
Circular single line layer described above is formed by many circular single line set; Tile-type single line layer is formed by the set of many tile-type single lines; Z-type single line layer is formed by the set of many Z-type single lines.
Tile-type conductor stock block layer described above is formed by plurality tile type conductor stock set of blocks; Z-type conductor stock block layer is formed by polylith Z-type conductor stock set of blocks.
The beneficial effects of the utility model are: compared with prior art, Stability Analysis of Structures of the present utility model, very close to each other between conductor single line, without the need to pressing, can meet between conductor single line and connecting requirement more closely; " Z " type or the segmentation corrugated type conductor stock block of tile-type conductor single line self supporting structure to the set of inside tighten effect, also without the need to adopting other bands to tighten, Stability Analysis of Structures, can not loose, displacement, displacement, the roundness of whole milliken conductor periphery is high.Tile-type conductor height and width are still less than the depth of penetration of 2 times, round conductor stock block, segmentation the insulation crimped paper being provided with isolation between corrugated type conductor stock block, outer stranded " Z " type or tile-type conductor single line, isolate all mutually, although amplitude peak add cross-sectional area of conductor, segmentation effect is still obvious, the adverse effect of " kelvin effect " and " approach effect " drops to bottom line, and the transmission capacity that improve wire of amplitude peak, maximum cross-section can reach 2000-4000 mm
2.
Accompanying drawing explanation
The structural representation of Fig. 1 to be the utility model inside and outside single line layer be circular single line;
The structural representation of Fig. 2 to be the inside and outside single line layer of the utility model be Z-type single line;
Fig. 3 to be the utility model conductor stock block layer be structural representation of 3 layers.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
A kind of multilayer super-huge cross section milliken conductor as shown in Figure 1, this conductor is composite type milliken conductor structure; This structure by center filling plastic bar 1, be separately positioned on the inside and outside single line layer 2,3 outside filling plastic bar 1 and the two-layer conductor stock block layer be arranged on outside outer single line layer 3 forms; Also be provided with the insulation crimped paper 7 of isolation between each layer there; Described inside and outside single line layer 2,3 is circular single line layer, and the first conductor stock block layer 4 is tile-type conductor stock block layer, and the second conductor stock block layer 5 is Z-type conductor stock block layer.
As shown in Figure 2, be with Fig. 1 difference: described inside and outside single line layer 2,3 is Z-type single line layer, the first conductor stock block layer 4, second conductor stock block layer 5 is tile-type conductor stock block layer.
As shown in Figure 3, be with Fig. 1,2 differences: overall structure is many, and one deck the 3rd conductor stock block layer the 6, three conductor stock block layer 6 is tile-type conductor stock block layer; Interior single line layer 2 is tile-type single line layer, and outer single line layer 3 is Z-type single line layer; First conductor stock block layer 4 is tile-type conductor stock block layer, and the second conductor stock block layer 5 is Z-type conductor stock block layer.
The utility model embody rule approach is a lot; the above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvement, these improvement also should be considered as protection range of the present utility model.
Claims (8)
1. a multilayer super-huge cross section milliken conductor, is characterized in that: this conductor is composite type milliken conductor structure; This structure by center filling plastic bar (1), be separately positioned on the outer inside and outside single line layer (2,3) of filling plastic bar (1) and be arranged on outer single line layer (2,3) the two-layer conductor stock block layer that is at least outward and form; Also be provided with the insulation crimped paper (7) of isolation between each layer there.
2. multilayer according to claim 1 super-huge cross section milliken conductor, is characterized in that: described interior single line layer (2) can be circular single line layer, tile-type single line layer or Z-type single line layer.
3. multilayer according to claim 1 super-huge cross section milliken conductor, is characterized in that: described outer single line layer (3) can be circular single line layer, tile-type single line layer or Z-type single line layer.
4. multilayer according to claim 1 super-huge cross section milliken conductor, is characterized in that: described conductor stock block layer is two-layer, comprises the first conductor stock block layer (4) and is arranged on the first conductor stock block layer (4) the second conductor stock block layer (5) outward.
5. multilayer according to claim 4 super-huge cross section milliken conductor, is characterized in that: the first described conductor stock block layer (4) can be tile-type conductor stock block layer or Z-type conductor stock block layer.
6. multilayer according to claim 4 super-huge cross section milliken conductor, is characterized in that: the second described conductor stock block layer (5) can be by tile-type conductor stock block layer or Z-type conductor stock block layer.
7. multilayer according to claim 1 super-huge cross section milliken conductor, it is characterized in that: described conductor stock block layer is three layers, comprise the first conductor stock block layer (4) and be successively set on the first conductor stock block layer (4) the second conductor stock block layer (5) outward, the 3rd conductor stock block layer (6).
8. multilayer according to claim 7 super-huge cross section milliken conductor, is characterized in that: the 3rd described conductor stock block layer (6) can be by tile-type conductor stock block layer or Z-type conductor stock block layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420710353.6U CN204215742U (en) | 2014-11-24 | 2014-11-24 | A kind of multilayer super-huge cross section milliken conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420710353.6U CN204215742U (en) | 2014-11-24 | 2014-11-24 | A kind of multilayer super-huge cross section milliken conductor |
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| CN204215742U true CN204215742U (en) | 2015-03-18 |
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| CN201420710353.6U Active CN204215742U (en) | 2014-11-24 | 2014-11-24 | A kind of multilayer super-huge cross section milliken conductor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409142A (en) * | 2014-11-24 | 2015-03-11 | 无锡江南电缆有限公司 | Super-huge type section split conductor |
| CN106782846A (en) * | 2016-12-30 | 2017-05-31 | 无锡江南电缆有限公司 | A kind of hollow milliken conductor of multilayer waterproofing type |
-
2014
- 2014-11-24 CN CN201420710353.6U patent/CN204215742U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409142A (en) * | 2014-11-24 | 2015-03-11 | 无锡江南电缆有限公司 | Super-huge type section split conductor |
| CN106782846A (en) * | 2016-12-30 | 2017-05-31 | 无锡江南电缆有限公司 | A kind of hollow milliken conductor of multilayer waterproofing type |
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