JPH0230007A - Low sag transmission line - Google Patents
Low sag transmission lineInfo
- Publication number
- JPH0230007A JPH0230007A JP17948588A JP17948588A JPH0230007A JP H0230007 A JPH0230007 A JP H0230007A JP 17948588 A JP17948588 A JP 17948588A JP 17948588 A JP17948588 A JP 17948588A JP H0230007 A JPH0230007 A JP H0230007A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- invar
- sag
- transmission line
- electrification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims description 21
- 229910001374 Invar Inorganic materials 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 4
- 229910000640 Fe alloy Inorganic materials 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 4
- 229910003271 Ni-Fe Inorganic materials 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 9
- 229910000838 Al alloy Inorganic materials 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
Landscapes
- Non-Insulated Conductors (AREA)
- Communication Cables (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は低弛度送電線、特に長径開用架空送電線及び
光ファイバ複合架空地線に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to low-sag power transmission lines, particularly to long-diameter open overhead power transmission lines and optical fiber composite overhead ground wires.
〈従来の技術とその課題〉
従来、低弛度送電線としては亜鉛めっきインバー撚線上
に超耐熱アルミ合金１（２Ｔ＃）を撚り合せたインバー
心超耐熱アルミ合金撚線（ＺＴＡＣＩＲ）やアルミ被覆
インバー撚線の上に特別耐熱アルミ合金線（ＸＴＮｌ）
を撚合せたインバー心特別耐熱アルミ合金撚＠（ＸＴ＾
ＣＩＲ）などが使用されている。<Conventional technology and its issues> Conventionally, as low-sag power transmission lines, invar-core super heat-resistant aluminum alloy stranded wire (ZTACIR), which is made by twisting super heat-resistant aluminum alloy 1 (2T#) on galvanized invar stranded wire, and aluminum-coated wires have been used. Special heat-resistant aluminum alloy wire (XTNl) on top of invar stranded wire
Invar core special heat-resistant aluminum alloy twisted＠(XT＾
CIR) etc. are used.
これらはアルミ合金線を通電対象とし、最大許容温度２
４０〜３１０℃として設計されている。These are aluminum alloy wires that are energized and the maximum allowable temperature is 2.
It is designed as 40-310°C.
そしてこれらは既設送電線の送電容量を既設線の２倍以
上、但し、１００％通電時の弛度は既設線と同程度以下
という条件で既設線（電力線）の張替用として使用され
ている。ただし長径開用としては使用されていない。These lines are used to replace existing lines (power lines) with the condition that the power transmission capacity of the existing line is at least twice that of the existing line, but the sag when 100% energized is equal to or less than that of the existing line. . However, it is not used for long-diameter openings.
一方、長径開用の送電線は径間長が長いため、電線の弛
度制限より電線の張力を強く張る必要があり、電線のサ
イズアップの必要から鉄塔高さを高く、鉄塔強度増加の
必要がある。On the other hand, since long-diameter open power transmission lines have long spans, it is necessary to increase the tension of the wires to meet the restrictions on wire sag.As a result of the need to increase the size of the wires, it is necessary to increase the height of the steel tower and increase the strength of the steel tower. There is.
従来の低弛度送電線は、亜鉛めっきインバー撚線１１に
通電目的の超耐熱アルミ合金線（ＺＴＪ）１２を撚合わ
せた第４図に示すような電線ＣやＮ被覆インバー撚線１
３に通電目的の特別耐熱アルミ合金１（ＸＴ＃）１４を
撚り合わせた第５図に示す電線Ｃ′であり、これらの長
径間使用を考えた場合、強度アップの必要性から亜鉛め
っきインバー撚線１１の径ｄ ゛あるいはＮ被覆インバ
ー撚線１３の径ｄ を大きくする必要があるが、それに
よって電線Ｃ１σの外径Ｄ およびＤ が太くなってし
まうという問題がある。Conventional low-sag power transmission lines are wires C as shown in Figure 4, which are galvanized invar stranded wires 11 twisted with super heat-resistant aluminum alloy wires (ZTJ) 12 for current carrying purposes, and N-coated invar stranded wires 1.
The electric wire C' shown in Fig. 5 is made by twisting special heat-resistant aluminum alloy 1 (XT#) 14 for current-carrying purposes into electric wire C'. Although it is necessary to increase the diameter d of the wire 11 or the diameter d of the N-covered invar stranded wire 13, there is a problem in that this increases the outer diameters D and D of the electric wire C1σ.
く課題を解決するための手段〉
この発明は上記に鑑みて電線外径を太くする程度を極力
小さくして強度を上げること及び高温時（１００％通電
時）の弛度を減少させることによって鉄塔高さをあまり
高くすることのない鉄塔費用が経済的な低弛度送電線を
得るべく検討の結果得られたものである。Means for Solving the Problems> In view of the above, the present invention improves the strength of steel towers by increasing the strength by minimizing the increase in the outer diameter of the wires and reducing the sag at high temperatures (100% energization). This was obtained as a result of studies aimed at obtaining an economical low-sag power transmission line without increasing the height of the tower.
即ち、この発明は、線膨脹係数の小さいＮｉ Ｆｅ合
金線よりなるインバー線を中心線とし、その上に通電目
的のＮ材を被覆した線材を撚合わせた低弛度送電線を提
供するものである。That is, the present invention provides a low-sag power transmission line in which an invar wire made of a NiFe alloy wire with a small coefficient of linear expansion is used as a center wire, and a wire coated with N material for current carrying purpose is twisted thereon. be.
く作用〉
従来の長径開用電線は、川や海の上を横断すること、電
線の下を船が通ることなどから電線の弛度に制限があり
、このため
（菖） 低弛度送電線を使用し、電線張力をアップさ
せた場合は、電線の強度アップより電線径が太くなり、
風圧が増加することになり鉄塔の強度増加を考える必要
がある。〉 Conventional long-diameter open power cables have limitations on the sag of the wires because they cross rivers or the sea, and ships pass under the wires.For this reason, low-sag power transmission lines If you increase the wire tension by using
As wind pressure increases, it is necessary to consider increasing the strength of the steel tower.
■ 従来の電線を使用し、長径間及び高温使用より生じ
る弛度層が生じ、鉄塔の高さを高くする必要がある。■ Conventional electric wires are used, and due to long spans and high temperature use, a sag layer occurs, making it necessary to increase the height of the steel tower.
これに対して、この発明は高温時の弛度を低下させてい
るので鉄塔の高さアップの程度の低減を計ることができ
、また電線径の増加を低減させているので、それに伴な
う風圧の低減などをはかることにより、電線の張力増の
程度を低減でき、鉄塔費用の低減が実施できることを目
的とし、この目的に合致する低弛度送電線として上記し
たようなＮｉ Ｆｅ合金よりなる線膨脹係数の非常に
小さいインバー線を中心線とし、その上にＮ被覆を施し
た線材を撚り合せた送電線を提案するものである。On the other hand, this invention reduces the sag at high temperatures, so it is possible to reduce the degree of increase in the height of the steel tower, and it also reduces the increase in wire diameter, so By reducing wind pressure, etc., the degree of increase in tension in electric wires can be reduced, and the cost of towers can be reduced.The purpose is to reduce the cost of towers by reducing wind pressure, etc., and as a low-sag power transmission line that meets this purpose, a Ni-Fe alloy as described above is used. We propose a power transmission line in which an invar wire with a very small coefficient of linear expansion is used as a center wire, and wires coated with N are twisted together on the center wire.
また長径開用光複合架空地線として、該金属撚線の中央
部に光ファイバケーブルを充填した金属パイプを有する
送電線を提供するものである。The present invention also provides a power transmission line having a metal pipe filled with an optical fiber cable in the center of the metal strands as a long-diameter open optical composite overhead ground wire.
この発明の送電線は第１図に断面図として示すように、
インバー線１にＮ被覆２を施した〃被覆インバー撚線を
撚合せたもので、Ｎ被覆が２３〜４０％の導電率を有し
、通電対象として使用するものであり、その最大許容温
度は３００〜４００℃である。As shown in FIG. 1 as a cross-sectional view, the power transmission line of this invention has the following features:
Invar wire 1 is coated with N coating 2. It is made by twisting coated invar stranded wires. The N coating has a conductivity of 23 to 40% and is used as a current-carrying object. The maximum allowable temperature is The temperature is 300-400°C.
第２図は電線外径の縮小化を目的にこれを扇形素線とし
たものであり、第１図より電線径は小さく、従って風圧
荷重を低減できる。FIG. 2 shows a fan-shaped element wire for the purpose of reducing the outer diameter of the electric wire, and the wire diameter is smaller than that in FIG. 1, so that the wind pressure load can be reduced.
また、第３図は長径開用光複合架空地線であり、第１図
に示すＮ被覆インバー線への撚線の中央部に光ファイバ
ケーブル３を充填した金属パイプ４を有するものである
。Further, FIG. 3 shows a long-diameter open optical composite overhead ground wire, which has a metal pipe 4 filled with an optical fiber cable 3 in the center of the twisted wire to the N-covered invar wire shown in FIG.
本提案の光複合架空地線は低弛度効果に合わせて電力線
からの誘導電流により光ファイバ複合架空地線の温度は
夏期に最大５０℃程度となり、冬期には光ファイバ複合
架空地線の温度は一３０℃程度となるので、１５０℃＃
−３０℃の温度差で光ファイバ複合架空地線の伸び縮み
があり、それに従って内部の光ファイバが伸び縮みから
生じる寿命の低下があるが、上記の構造からなるこの発
明の送電線であれば、温度差による伸び縮みの程度が、
従来の鉄線を使用した光ファイバ複合架空地線より非常
に少なく、光ファイバの寿命上非常に有利である。The proposed optical composite overhead ground wire has a low sag effect, and the temperature of the optical fiber composite overhead ground wire reaches a maximum of about 50℃ in the summer due to the induced current from the power line, and the temperature of the optical fiber composite overhead ground wire in the winter. is about -30℃, so 150℃#
A temperature difference of -30°C causes the optical fiber composite overhead ground wire to expand and contract, and the internal optical fiber accordingly expands and contracts, resulting in a shortened life span. , the degree of expansion and contraction due to temperature difference is
This is much less than the conventional optical fiber composite overhead ground wire using iron wire, which is very advantageous in terms of the life of the optical fiber.
〈発明の効果〉
以上説明したように、この発明の低弛度送電線は長径開
用電力線、光フアイバ複合架空地線用の張替線としてそ
の効果は非常に大きいということができるのである。<Effects of the Invention> As explained above, the low sag power transmission line of the present invention can be said to be very effective as a re-spanning line for long-diameter open power lines and optical fiber composite overhead ground lines.
第１図はこの発明の送電線の構造を示す断面図、第２図
および第３図は夫々この発明の送電線の他の例を示す断
面図、第４図および第５図は従来既設線の張替用として
用いられている送電線の構成を示す説明図である。
１・・・インバー線 ２・・・Ｎ被覆３・
・・光ファイバ ４・・・金属パイプＡ・
・・Ｎ被覆インバー線
出願人代理人 弁理士 和 １） 昭第
図
Δ
第２図
第８図
第４図
第５図FIG. 1 is a cross-sectional view showing the structure of a power transmission line according to the present invention, FIGS. 2 and 3 are cross-sectional views showing other examples of the power transmission line according to the present invention, and FIGS. 4 and 5 are cross-sectional views showing the structure of a conventional power transmission line. FIG. 2 is an explanatory diagram showing the configuration of a power transmission line used for re-stretching. 1... Invar wire 2... N coating 3.
・・Optical fiber 4・・Metal pipe A・
...N coated invar wire applicant's agent Patent attorney Kazu 1) Showa diagram Δ Figure 2 Figure 8 Figure 4 Figure 5
Claims (2)
ンバー線を中心線とし、その上に通電目的のＡｌ材を被
覆した線材を撚り合わせてなる低弛度送電線。(1) A low-sag power transmission line made of an invar wire made of a Ni--Fe alloy wire with a small coefficient of linear expansion as a center line, and a wire coated with an Al material for current carrying purpose twisted together.
ブルを装填した金属パイプを有してなり、光通信と架空
地線を目的とした請求項（１）記載の低弛度送電線。(2) The low-sag power transmission line according to claim (1), which has a metal pipe in which an optical fiber cable is loaded in the center of the metal stranded wire, and is intended for optical communication and an overhead ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17948588A JPH0230007A (en) | 1988-07-19 | 1988-07-19 | Low sag transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17948588A JPH0230007A (en) | 1988-07-19 | 1988-07-19 | Low sag transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0230007A true JPH0230007A (en) | 1990-01-31 |
Family
ID=16066654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17948588A Pending JPH0230007A (en) | 1988-07-19 | 1988-07-19 | Low sag transmission line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0230007A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5143448A (en) * | 1990-06-05 | 1992-09-01 | Kabushiki Kaisha Kobe Seiko Sho | Two-shaft continuous mixing apparatus |
| JPH0650170U (en) * | 1992-12-17 | 1994-07-08 | 古河電気工業株式会社 | Overhead ground wire with built-in optical fiber |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618910B2 (en) * | 1976-10-26 | 1986-03-18 | ||
| JPS6266505A (en) * | 1985-09-19 | 1987-03-26 | 三菱電線工業株式会社 | Compound strand for power cable conductor |
-
1988
- 1988-07-19 JP JP17948588A patent/JPH0230007A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618910B2 (en) * | 1976-10-26 | 1986-03-18 | ||
| JPS6266505A (en) * | 1985-09-19 | 1987-03-26 | 三菱電線工業株式会社 | Compound strand for power cable conductor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5143448A (en) * | 1990-06-05 | 1992-09-01 | Kabushiki Kaisha Kobe Seiko Sho | Two-shaft continuous mixing apparatus |
| JPH0650170U (en) * | 1992-12-17 | 1994-07-08 | 古河電気工業株式会社 | Overhead ground wire with built-in optical fiber |
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