CN104361949A - Split conductor with optical fibers internally installed in fan-shaped center - Google Patents
Split conductor with optical fibers internally installed in fan-shaped center Download PDFInfo
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- CN104361949A CN104361949A CN201410678959.0A CN201410678959A CN104361949A CN 104361949 A CN104361949 A CN 104361949A CN 201410678959 A CN201410678959 A CN 201410678959A CN 104361949 A CN104361949 A CN 104361949A
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Abstract
The invention discloses a split conductor with optical fibers internally installed in a fan-shaped center. The split conductor is structurally formed by integrating a plurality of fan-shaped conductor strand blocks, insulation crepe paper used for separating the strand blocks is arranged among the fan-shaped conductor strand blocks, and a wiring harness with an optical fiber unit directly dragged in the center is arranged in the center of the integrated fan-shaped conductor strand blocks. The split conductor with the optical fibers internally installed in the fan-shaped center can monitor the temperature and transmission loads of power cables in real time, and can be used as a large-section conductor can be used in integration of three networks and be used as a large-section conductor in intelligent cables and extra-high voltage and high-voltage power cables. The center wiring harness wraps the directly dragged optical fiber unit, the optical fibers will not be pulled to be broken, the wiring harness effectively protects the optical fiber unit so that the optical fiber unit can not be extruded in the processes of processing and laying, particularly, the cables are bound to give out heat and expand when operating, the wiring harness can guarantee a space for containing the optical fibers, the elastic materials forming the wiring harness provide a buffering space for the expanded inside, and it is guaranteed that the optical fibers are not damaged and the cables can operate normally.
Description
Technical field
The present invention relates to cable conductor field, specifically a kind of milliken conductor of fan shape center built-in fiber.
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 prior art sector element milliken conductor, outward appearance rounding after will fully taking into account stranding when structure and casted die mould design and the electrical property of conductor, will ensure that two angles of sector, fan-shaped central angle (drift angle) are sharper, then after stranding every two secter pat junctions cross get over smooth, without obvious recessed joint, outward appearance rounding, center tight.But the sharper difficulty of processing in angle is larger, the rough of conductive surface can be caused in the too sharp-pointed course of processing, easily cause concentrating of internal field, cause point discharge.
Along with rolling up of China's superhigh pressure and the high voltage power cable amount of laying, security of operation and the quality monitoring of power cable are more and more important, need to utilize distribution type fiber-optic measuring system (DTS) to carry out temperature, transmission load is monitored in real time, internal or external extraordinary temperature measuring optical cable is realized to superhigh pressure and high voltage power cable and becomes optical fiber composite high-voltage cable, be i.e. so-called " intelligent cable ".Meanwhile, " integration of three networks " has been included in the Pilot project construction of intelligent grid by Utilities Electric Co., and national grid is tried hard to recommend power optical fiber in the whole nation and registered one's residence, and requires to realize the photoelectric compound cable of power optical fiber to family of electrical network end electric power and communicate " integration ".
Processing due to sector element milliken conductor needs the set through single line strand system, pretwist, stock block stranded etc., all larger twisting resistance, tensile force can be produced in process, particularly milliken conductor cross section is larger, the twisting resistance, tensile force etc. that produce are also larger, in this milliken conductor, built-in fiber is very easily twisted off or is broken, and does not have temperature, the effect monitored in real time of transmission load.The structure that stainless steel tube or other metal tubes are set outside optical fiber is had in prior art, as Chinese patent CN201220468863.8 discloses a kind of running status can detection streamer, optical fiber is used for signal transmission, and stainless steel tube is coated on outside optical fiber, and stainless steel tube is stranded in cable conductor center.This structure stainless steel tube thickness is larger, external diameter is larger, and the space of needs is also larger, and the central angle (drift angle) of sector element is also larger, and difficulty of processing increases, and the gap between stainless steel tube and sector element is also larger; Stainless steel tube external diameter is too small, the diameter of its steel pipe also will inevitably be little, the twisting resistance that can bear, tensile force are also still less, can be flattened, break optical fiber, or twist off, break optical fiber, and mesolow, small bore cable that this patent is also just common, limit the application in heavy in section fan-segmentation conductor.Meanwhile, stainless steel tube or other metal tubes also can cause electric field uneven, increase line loss.
Summary of the invention
The present invention, in order to solve problems of the prior art, provides a kind of center tight, optical fiber is not easy to be pulled off, may be used for superhigh pressure and high voltage power cable, the milliken conductor can monitored in real time temperature, transmission load.
The milliken conductor of a kind of fan shape center built-in fiber of the present invention, this conductor structure is formed by several sector conductor stock set of blocks; The insulation crimped paper of being kept apart by each stock block is provided with between described sector conductor stock block; The silk thread bundle that a central straight drags fiber unit is provided with at the center of each sector conductor stock set of blocks.
Further improvement, described fiber unit is one or more.
Further improvement, when described fiber unit is many, is provided with silk thread and isolates between optical fiber.
Further improvement, described fiber unit is layer-stranding cable, slotted core cable, unit type optical fiber cable or central tube type optical cable.
Further improvement, described silk thread is waterproofing rope or water blocking yarn.
Beneficial effect of the present invention is: compared with prior art, conductor center of the present invention built-in fiber unit, temperature can be carried out to power cable, transmission load is monitored in real time, can be used in making large size conductor in " integration of three networks ", " intelligent cable " superhigh pressure and high voltage power cable.Central hair wire harness surrounds the fiber unit directly dragged; optical fiber can not be pulled off; silk thread bundle has also carried out available protecting to fiber unit; process, lay time can not be extruded, particularly when cable runs, be bound to generate heat and expand; space optical fiber can be ensured; elastic material provides again the space of buffering to the inside of expanding, ensure that optical fiber can not be damaged, can normally run.Use waterproofing rope or water blocking yarn, when running into the entering of moisture, promptly can expand, absorb moisture, play the effect blocked water.Central hair wire harness surrounds the fiber unit directly dragged, and in the course of processing, the central angle of sector element does not need the very sharp of processing, can be full by center-filled, makes center tight, decreases the difficulty of processing of sector element.Do not have stainless steel tube outside optical fiber, the space of needs is little, and do not need the central angle (drift angle) increasing sector element, electric fields uniform, can not increase line loss.
Accompanying drawing explanation
Fig. 1 is sector conductor stock block of the present invention is four block structure schematic diagrames;
Fig. 2 is sector conductor stock block of the present invention is five block structure schematic diagrames;
Fig. 3 is sector conductor stock block of the present invention is six block structure schematic diagrames;
The structural representation that Fig. 4 is silk thread bundle inner fiber unit of the present invention when being many.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The milliken conductor of a kind of fan shape center built-in fiber as shown in Figure 1, this conductor structure is formed by four pieces of sector conductor stock blocks 1 set; The insulation crimped paper 2 of being kept apart by each stock block is provided with between described sector conductor stock block 1; The silk thread bundle 4 that a central straight drags fiber unit 3 is provided with at the center of each sector conductor stock block 1 set.
A milliken conductor for fan shape center built-in fiber as shown in Figure 2, this conductor structure is formed by five pieces of sector conductor stock blocks 1 set; The insulation crimped paper 2 of being kept apart by each stock block is provided with between described sector conductor stock block 1; The silk thread bundle 4 that a central straight drags fiber unit 3 is provided with at the center of each sector conductor stock block 1 set.
The milliken conductor of a kind of fan shape center built-in fiber as shown in Figure 3, this conductor structure is formed by six pieces of sector conductor stock blocks 1 set; The insulation crimped paper 2 of being kept apart by each stock block is provided with between described sector conductor stock block 1; The silk thread bundle 4 that a central straight drags fiber unit 3 is provided with at the center of each sector conductor stock block 1 set.
As shown in Figure 4, the fiber unit 3 in described silk thread bundle 4 is 2, and the space between fiber unit 3 is filled by silk thread 5.
Embody rule approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (5)
1. a milliken conductor for fan shape center built-in fiber, is characterized in that: this conductor structure is formed by the set of several sector conductor stock blocks (1); The insulation crimped paper (2) of being kept apart by each stock block is provided with between described sector conductor stock block (1); The silk thread bundle (4) that a central straight drags fiber unit (3) is provided with at the center that each sector conductor stock block (1) is gathered.
2. the milliken conductor of fan shape center built-in fiber according to claim 1, is characterized in that: described fiber unit (3) is one or more.
3. the milliken conductor of fan shape center built-in fiber according to claim 1, is characterized in that: when described fiber unit (3) is for many, is provided with silk thread (5) and isolates between optical fiber.
4. the milliken conductor of fan shape center built-in fiber according to claim 1, is characterized in that: described fiber unit (3) is layer-stranding cable, slotted core cable, unit type optical fiber cable or central tube type optical cable.
5. the milliken conductor of fan shape center built-in fiber according to claim 3, is characterized in that: described silk thread (5) is waterproofing rope or water blocking yarn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678959.0A CN104361949A (en) | 2014-11-24 | 2014-11-24 | Split conductor with optical fibers internally installed in fan-shaped center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678959.0A CN104361949A (en) | 2014-11-24 | 2014-11-24 | Split conductor with optical fibers internally installed in fan-shaped center |
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| Publication Number | Publication Date |
|---|---|
| CN104361949A true CN104361949A (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410678959.0A Pending CN104361949A (en) | 2014-11-24 | 2014-11-24 | Split conductor with optical fibers internally installed in fan-shaped center |
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| Country | Link |
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| CN (1) | CN104361949A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531319A (en) * | 2016-12-31 | 2017-03-22 | 无锡江南电缆有限公司 | Composite wind power cable with tensile optical fiber |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07114835A (en) * | 1993-10-20 | 1995-05-02 | Mitsubishi Cable Ind Ltd | Optical fiber composite overhead earth-wire |
| CN101714433A (en) * | 2009-12-29 | 2010-05-26 | 沈阳古河电缆有限公司 | Method for twisting fibers in center of composite power cable conductor |
| CN203325569U (en) * | 2013-06-04 | 2013-12-04 | 四川九洲线缆有限责任公司 | Large cross-section special-shaped center tube type photoelectric compound low-voltage cable |
| CN203910335U (en) * | 2014-06-17 | 2014-10-29 | 重庆柒安电线电缆（集团）有限责任公司 | Shaped conductor fiber composite low-voltage power cable |
| CN203931643U (en) * | 2014-04-16 | 2014-11-05 | 江苏藤仓亨通光电有限公司 | A kind of novel built on stilts composite cable |
| CN104155736A (en) * | 2014-08-29 | 2014-11-19 | 南京烽火藤仓光通信有限公司 | Optical fiber with high tensile strength |
| CN204215785U (en) * | 2014-11-24 | 2015-03-18 | 无锡江南电缆有限公司 | The milliken conductor of a kind of center built-in fiber |
-
2014
- 2014-11-24 CN CN201410678959.0A patent/CN104361949A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07114835A (en) * | 1993-10-20 | 1995-05-02 | Mitsubishi Cable Ind Ltd | Optical fiber composite overhead earth-wire |
| CN101714433A (en) * | 2009-12-29 | 2010-05-26 | 沈阳古河电缆有限公司 | Method for twisting fibers in center of composite power cable conductor |
| CN203325569U (en) * | 2013-06-04 | 2013-12-04 | 四川九洲线缆有限责任公司 | Large cross-section special-shaped center tube type photoelectric compound low-voltage cable |
| CN203931643U (en) * | 2014-04-16 | 2014-11-05 | 江苏藤仓亨通光电有限公司 | A kind of novel built on stilts composite cable |
| CN203910335U (en) * | 2014-06-17 | 2014-10-29 | 重庆柒安电线电缆（集团）有限责任公司 | Shaped conductor fiber composite low-voltage power cable |
| CN104155736A (en) * | 2014-08-29 | 2014-11-19 | 南京烽火藤仓光通信有限公司 | Optical fiber with high tensile strength |
| CN204215785U (en) * | 2014-11-24 | 2015-03-18 | 无锡江南电缆有限公司 | The milliken conductor of a kind of center built-in fiber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531319A (en) * | 2016-12-31 | 2017-03-22 | 无锡江南电缆有限公司 | Composite wind power cable with tensile optical fiber |
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Application publication date: 20150218 |