CN202230796U - Large sectional area power cable of radial layered stranded conductor - Google Patents
Large sectional area power cable of radial layered stranded conductor Download PDFInfo
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- 239000004020 conductor Substances 0.000 title claims abstract description 115
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 49
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000009413 insulation Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000002500 effect on skin Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
本实用新型径向分层绞合导体的大截面积电力电缆，包括圆形截面的导体，导体沿半径方向分为内、外两层，外层为外环导体，内层为中心导体，在外环导体和中心导体间设置第一绝缘层，中心导体由多个扇形股块绞合而成，相邻两个扇形股块之间设置第二绝缘层；外环导体由多个扇环形股块绞合而成，相邻两个扇环形股块之间设置第三绝缘层，每个扇形股块和每个扇环形股块均由多根金属单线构成。本实用新型径向分层绞合导体的大截面积电力电缆，通过加设第一绝缘层，提高导体中间部位的电流密度，在不增加导体的情况下，提高了电力电缆的载流量，节省了导体材料。
The large cross-sectional area power cable of the radial layered stranded conductor of the utility model includes a circular cross-section conductor, and the conductor is divided into inner and outer layers along the radial direction, the outer layer is an outer ring conductor, and the inner layer is a central conductor. The first insulating layer is set between the outer ring conductor and the central conductor, the central conductor is twisted by multiple fan-shaped strands, and the second insulating layer is set between two adjacent fan-shaped strands; the outer ring conductor is made of multiple fan-shaped strands A third insulating layer is set between two adjacent fan-shaped strands, and each fan-shaped strand and each fan-shaped strand is composed of multiple metal single wires. The large cross-sectional area power cable of the radial layered stranded conductor of the utility model increases the current density of the middle part of the conductor by adding the first insulating layer, and improves the current carrying capacity of the power cable without increasing the conductor, saving energy. conductor material.
Description
技术领域 technical field
本实用新型涉及一种电力电缆，特别涉及一种径向分层绞合导体的大截面积电力电缆。The utility model relates to a power cable, in particular to a power cable with a large cross-sectional area of radial layered stranded conductors.
背景技术 Background technique
电力电缆一般由铜导体线芯、绝缘层、金属护套、内护层和外被层所组成。电力电缆的导体一般为绞合铜单线构成，承担着通载电流的核心功能，其导体通过交流电流时，受集肤效应影响，导体的电流密度分布并不均匀。随着导体截面的增大，电流密度由内向外逐渐增大的效应逐渐显著，导体单位面积上的平均电流密度逐渐减小，导体利用率逐步下降，其交流电阻逐渐增大。中国实用新型CN2598104Y公开了一种大截面铜芯五分割导体，把铜芯截面分割成五个相互分离的股块，每个股块间设置绝缘皱纹纸。中国实用新型CN101620898A公开了一种超高压铝芯分割导体交联聚乙烯绝缘电力电缆的生产方法，通过该方法得到由五股铝芯股块扭合而成的电力电缆。由于电缆导体的集肤效应，每股导体的电流密度分布在其外围，每股导体的中间部位的电流密度就很小，降低了导体的载流量。中国实用新型CN201408562Y公开一种分割导体及铜单线，在每根铜单线表面形成一层氧化铜薄膜，使每根铜单线作为一分割导体，减少集肤效应，但是其生产工艺复杂，生产效率低，不适用于大截面积的电力电缆。Power cables are generally composed of copper conductor cores, insulation layers, metal sheaths, inner sheaths and outer layers. The conductors of power cables are generally composed of stranded copper single wires, which undertake the core function of carrying current. When the conductors pass through alternating current, the current density distribution of the conductors is not uniform due to the influence of the skin effect. With the increase of the cross section of the conductor, the effect of the current density gradually increasing from the inside to the outside is gradually significant, the average current density per unit area of the conductor is gradually reduced, the utilization rate of the conductor is gradually decreased, and its AC resistance is gradually increased. Chinese utility model CN2598104Y discloses a five-segmented conductor with a large cross-section copper core, which divides the cross-section of the copper core into five separate strands, and sets insulating crepe paper between each strand. Chinese utility model CN101620898A discloses a production method of an ultra-high voltage aluminum core split conductor XLPE insulated power cable, through which a power cable formed by twisting five aluminum core strands is obtained. Due to the skin effect of the cable conductor, the current density of each conductor is distributed on its periphery, and the current density in the middle of each conductor is very small, which reduces the carrying capacity of the conductor. Chinese utility model CN201408562Y discloses a split conductor and copper single wire, forming a layer of copper oxide film on the surface of each copper single wire, so that each copper single wire can be used as a split conductor to reduce skin effect, but its production process is complicated and the production efficiency is low , not suitable for power cables with large cross-sectional areas.
实用新型内容 Utility model content
本实用新型所要解决的问题是提供一种径向分层绞合导体的大截面积电力电缆，克服现有技术中存在的上述问题。The problem to be solved by the utility model is to provide a large cross-sectional area power cable with radially layered stranded conductors, so as to overcome the above-mentioned problems in the prior art.
本实用新型径向分层绞合导体的大截面积电力电缆，包括圆形截面的导体，所述导体沿半径方向分为内、外两层，外层为外环导体，内层为中心导体，在外环导体和中心导体间设置第一绝缘层，所述中心导体由多个扇形股块绞合而成，相邻两个扇形股块之间设置第二绝缘层；所述外环导体由多个扇环形股块绞合而成，相邻两个扇环形股块之间设置第三绝缘层，每个扇形股块和每个扇环形股块均由多根金属单线构成。The large cross-sectional area power cable of the radial layered stranded conductor of the utility model includes a circular cross-section conductor, and the conductor is divided into inner and outer layers along the radial direction, the outer layer is an outer ring conductor, and the inner layer is a central conductor , a first insulating layer is set between the outer ring conductor and the central conductor, the central conductor is twisted by a plurality of fan-shaped strands, and a second insulating layer is arranged between two adjacent fan-shaped strands; the outer ring conductor It is formed by twisting multiple fan-shaped strands, and a third insulating layer is arranged between two adjacent fan-shaped strands. Each fan-shaped strand and each fan-shaped strand is composed of multiple metal single wires.
本实用新型所述第二绝缘层和第三绝缘层为绝缘皱纹纸。The second insulating layer and the third insulating layer described in the utility model are insulating crepe papers.
本实用新型所述扇环形股块的数量与扇形股块的数量相等。The quantity of the sector-shaped strands described in the utility model is equal to the quantity of the sector-shaped strands.
本实用新型所述扇环形股块的数量为扇形股块数量的两倍。The quantity of the fan-shaped strands described in the utility model is twice the number of the fan-shaped strands.
本实用新型所述第一绝缘层设置在所述导体半径的中点处，使所述外环导体的外径为中心导体外径的两倍。In the present invention, the first insulating layer is arranged at the midpoint of the conductor radius, so that the outer diameter of the outer ring conductor is twice the outer diameter of the central conductor.
本实用新型所述第一绝缘层为塑料绝缘层。The first insulating layer described in the utility model is a plastic insulating layer.
本实用新型所述导体的外面还依次设有半导电层、绝缘层、半导电屏蔽层、缓冲层、金属护套和外被层。The outer surface of the conductor described in the utility model is further provided with a semiconductive layer, an insulating layer, a semiconductive shielding layer, a buffer layer, a metal sheath and an outer layer.
通过以上技术方案，本实用新型的径向分层绞合导体的大截面积电力电缆，通过在导体内加设一层第一绝缘层，在不增加导体截面的情况下，提高了导体中间部位的平均电流密度，大大减小了导体的交流电阻，提高了电缆导体的载流能力，并且在加工生产时简化了导体的生产工艺，提高了生产效率，在电缆接头处和终端处，更好的进行操作。以前，为了提高电缆的载流量，只能靠增加电缆导体的截面积来达到这目的，本实用新型在不增加电缆导体的截面积下就能提高其载流量，这样就省下了大量导体，不仅降低了电缆的成本，而且还节约了矿石能源、减小二氧化碳排放，支持低碳发展。Through the above technical proposal, the large cross-sectional area power cable of the radial layered stranded conductor of the utility model, by adding a layer of first insulating layer in the conductor, without increasing the cross section of the conductor, the middle part of the conductor is improved. The average current density of the conductor greatly reduces the AC resistance of the conductor, improves the current carrying capacity of the cable conductor, and simplifies the production process of the conductor during processing and production, improves the production efficiency, and is better at the cable joint and terminal. to operate. In the past, in order to increase the ampacity of the cable, the purpose could only be achieved by increasing the cross-sectional area of the cable conductor. The utility model can increase the ampacity without increasing the cross-sectional area of the cable conductor, thus saving a large number of conductors. It not only reduces the cost of cables, but also saves ore energy, reduces carbon dioxide emissions, and supports low-carbon development.
附图说明 Description of drawings
图1本实用新型第一实施例的具体结构图。Fig. 1 is a specific structural diagram of the first embodiment of the utility model.
图2本实用新型第二实施例的具体结构图。Fig. 2 is a specific structural diagram of the second embodiment of the utility model.
具体实施方式 Detailed ways
如图1及图2所示，径向分层绞合导体的大截面积电力电缆，包括圆形截面的导体1，导体沿半径方向分为内、外两层，外层为外环导体，内层为中心导体，在外环导体和中心导体间设置第一绝缘层3，中心导体由多个扇形股块绞合而成，相邻两个扇形股块之间设置第二绝缘层；外环导体由多个扇环形股块绞合而成，相邻两个扇环形股块之间设置第三绝缘层，每个扇形股块和每个扇环形股块均由多根金属单线构成。通过第一绝缘层只需把导体分成两层，每层又分成多股，每股由多根金属单线绞合而成，相邻金属单线可导通每根单线外表面无需绝缘设置，就能减少集肤效应对导体的影响，提高了导体中间部位的平均电流密度，大大减小了导体的交流电阻，提高了电缆导体的载流能力；通过分层构成导体简化了生产工艺，提高了生产效率，特别适用于大截面积的电力电缆。As shown in Figure 1 and Figure 2, the large cross-sectional area power cable with radially layered stranded conductors includes a conductor 1 with a circular cross section. The conductor is divided into inner and outer layers along the radial direction, and the outer layer is an outer ring conductor. The inner layer is the center conductor, and the first insulating layer 3 is set between the outer ring conductor and the center conductor. The ring conductor is formed by twisting a plurality of sector-shaped strands, a third insulating layer is arranged between two adjacent sector-shaped strands, and each sector-shaped strand and each sector-shaped strand is composed of multiple metal single wires. Through the first insulating layer, only need to divide the conductor into two layers, and each layer is divided into multiple strands, each strand is formed by twisting multiple metal single wires, and the adjacent metal single wires can be connected without insulation on the outer surface of each single wire. Reduce the influence of the skin effect on the conductor, increase the average current density in the middle of the conductor, greatly reduce the AC resistance of the conductor, and improve the current carrying capacity of the cable conductor; the production process is simplified by layering the conductor, and the production process is improved. Efficiency, especially suitable for power cables with large cross-sectional area.
如图1所示为本实用新型径向分层绞合导体的大截面积电力电缆的一具体实施例，该电力电缆由内到外分别为导体1、半导电层4、绝缘层5、半导电屏蔽层6、缓冲层7、金属护套8和外被层9。外环导体扇环形股块的数量与中心导体扇形股块的数量相等(见图1)，并第二绝缘层和第三绝缘层为绝缘皱纹纸2。此时导体被分成十块小的导体股块，提高了导体中间部位的电流密度，减小了导体的交流电阻，在不增加导体的情况下，提高了电力电缆的载流量。并且在加工生产时，先生产中心导体的扇形股块，由于其截面小更易于生产，五块扇形股块分别完成后绞合形成中心导体，再把第一绝缘层3第一在中心导体外，绕后再把生产好的扇环形股块绞合在第一绝缘层的外围，以此形成电力电缆的导体。因为减小了每个股块的截面积，因此提高了每个股块的生产效率并易满足技术指标。通过两次绞合生产加强了电力电缆导体的圆滑性提高了导体的载流性能，并简化了大截面积电缆导体的生产工艺，使在电缆接头处和终端处更好的进行操作。As shown in Figure 1, it is a specific embodiment of a large cross-sectional area power cable with a radial layered stranded conductor of the present invention. The power cable is respectively a conductor 1, a semiconducting layer 4, an insulating layer 5, a semiconducting layer Conductive shielding layer 6 , buffer layer 7 , metal sheath 8 and outer coating layer 9 . The quantity of the fan-shaped strands of the outer ring conductor is equal to the number of the fan-shaped strands of the central conductor (see Figure 1), and the second insulation layer and the third insulation layer are insulating crepe paper 2 . At this time, the conductor is divided into ten small conductor strands, which increases the current density in the middle of the conductor, reduces the AC resistance of the conductor, and increases the current carrying capacity of the power cable without increasing the conductor. And during processing and production, the fan-shaped strands of the central conductor are first produced. Because of its small cross-section, it is easier to produce. After the five fan-shaped strands are respectively completed, they are twisted to form a central conductor, and then the first insulating layer 3 is placed outside the central conductor. After winding, the produced fan-shaped strands are stranded on the periphery of the first insulating layer to form the conductor of the power cable. Because the cross-sectional area of each strand is reduced, the production efficiency of each strand is improved and the technical index is easily met. The smoothness of the power cable conductor is enhanced by the double-strand production, the current-carrying performance of the conductor is improved, and the production process of the cable conductor with a large cross-sectional area is simplified, so that the operation at the cable joint and terminal is better.
如图2所示为本实用新型径向分层绞合导体的大截面积电力电缆的另一具体实施例，扇环形股块的数量为扇形股块数量的两倍。电缆导体在成型时，首先制成中心导体，把圆形铜单线绞合压制成扇形导体，然后五个扇形导体再进行绞合成中心导体，在相邻两股扇形股块之间设有第二绝缘层；再次在制成的中心导体外围加一层第一绝缘层3，然后在其外面绞合已经成型的扇环形股块，在扇环形股块之间设有第三绝缘层，第二绝缘层和第三绝缘层一般采用绝缘皱纹纸2。由于在中心导体与外环导体间加设了第一绝缘层，外环导体的股块数可以倍增，因此在不增加导体的情况下，更加提高了电缆导体的载流量能力，节省了导体材料。As shown in Fig. 2, another specific embodiment of the large cross-sectional area power cable with radially layered stranded conductors of the present invention, the number of sector-shaped strands is twice the number of sector-shaped strands. When the cable conductor is formed, it is first made into a central conductor, and the circular copper single wire is twisted and pressed into a fan-shaped conductor, and then five fan-shaped conductors are twisted into a central conductor, and a second fan-shaped strand is arranged between two adjacent fan-shaped strands Insulation layer; Add a layer of first insulation layer 3 on the periphery of the center conductor made, then twist the formed fan-ring strands outside it, and a third insulation layer is provided between the fan-ring strands, the second The insulating layer and the third insulating layer generally use insulating crepe paper 2 . Since the first insulating layer is added between the central conductor and the outer ring conductor, the number of strands of the outer ring conductor can be doubled, so the current carrying capacity of the cable conductor is further improved without increasing the conductor, and the conductor material is saved .
为使电力电缆的载流量达到同截面的最大载流量，把第一绝缘层3设置在导体半径的中点处，使外环导体的外径为中心导体外径的两倍，实现了在最少分层的情况下，也能达到最大的抗集肤效应，使电力电缆达到最大载流量，并简化了生产工艺。In order to make the current-carrying capacity of the power cable reach the maximum current-carrying capacity of the same section, the first insulating layer 3 is arranged at the midpoint of the conductor radius, so that the outer diameter of the outer ring conductor is twice the outer diameter of the central conductor, achieving a minimum In the case of layering, it can also achieve the maximum anti-skin effect, make the power cable reach the maximum current carrying capacity, and simplify the production process.
第一绝缘层3优选为塑料绝缘层，塑料绝缘和绝缘纸相比较，具有很高的强度，其抗撕裂强度为300％，而绝缘纸的抗撕裂强度为30％左右，从而减小了绝缘破损的可能性；并且在工艺上，塑料绝缘可以采用全退扭工艺，而绝缘纸不能采用这种全退扭工艺因为其若用于该工艺会被破坏而失去绝缘的效果，而这种工艺的好处就是使电缆导体更加圆整，提高了电力电缆的性能。The first insulating layer 3 is preferably a plastic insulating layer. Compared with insulating paper, the plastic insulating layer has very high strength, and its tear strength is 300%, while the tear strength of insulating paper is about 30%, thereby reducing The possibility of insulation damage is eliminated; and in terms of technology, plastic insulation can use a full back-twist process, while insulating paper cannot use this full-back twist process because it will be destroyed and lose its insulating effect if it is used in this process, and this The advantage of this process is to make the cable conductor more round and improve the performance of the power cable.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120284736.8U CN202230796U (en) | 2011-08-05 | 2011-08-05 | Large sectional area power cable of radial layered stranded conductor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201120284736.8U CN202230796U (en) | 2011-08-05 | 2011-08-05 | Large sectional area power cable of radial layered stranded conductor |
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| CN202230796U true CN202230796U (en) | 2012-05-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915809A (en) * | 2011-08-05 | 2013-02-06 | 上海电缆研究所 | Large sectional area power cable of radially layered stranded conductor |
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2011
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915809A (en) * | 2011-08-05 | 2013-02-06 | 上海电缆研究所 | Large sectional area power cable of radially layered stranded conductor |
| CN102915809B (en) * | 2011-08-05 | 2015-09-30 | 上海电缆研究所 | Power cable is amassed in the heavy in section of radially layered stranded conductor |
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