JPS6185711A - Low wind noise type wire - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 【産業上の利用分野〕 この発明は風に起因する騒音の発生を防止した低風騒音
型電線に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a low wind noise electric wire that prevents the generation of noise caused by wind.

〔従来技術とその問題点〕[Prior art and its problems]

架空送電線や架空地線では、一方向から風を受けた時に
電線の表面における空気のはく離現象により上記電線の
後方に規則的な周期でカルマン渦が発生する。そしてこ
のカルマン＊に起因する上記Ｗ１Ｍ後方での圧力変動に
よプ上配電線が振動し、この振動が主な原因となって周
囲）Ｃｌｉ音を発生することが知られている。When an overhead power transmission line or an overhead ground wire receives wind from one direction, Karman vortices are generated behind the wire at regular intervals due to the separation of air on the surface of the wire. It is known that pressure fluctuations at the rear of the W1M caused by Karman* cause the upper distribution line to vibrate, and that this vibration is the main cause of ambient Cli noise.

一方、近年住宅地が郊外へと向けて広がるに連れて、架
空送電線と一般の住宅とが互層に近接する地域も広域化
し、この結果４？にこのような地域において上記ＩＥ線
による風騒音の防止が１！請されている。On the other hand, as residential areas have expanded toward the suburbs in recent years, areas where overhead power lines and ordinary residences are close to each other have become wider, resulting in 4. In such areas, the prevention of wind noise caused by the above IE line is 1! requested.

このため従来、上記ｔｔ線の外周く各種のスパイラルロ
ッドを巻回することくより上記電線の表面く凹凸を形成
し、カルマン渦の発生を不規則なものとすることＫより
上記電線の共振を抑制して騒音の低減化を図った低風騒
音型電線が各種提案されている。For this reason, in the past, various spiral rods were wound around the outer circumference of the tt wire to form irregularities on the surface of the wire to make the generation of Karman vortices irregular. Various types of low wind noise electric wires have been proposed to suppress and reduce noise.

しかしながら上記従来の低風騒音ｆｆｉ電ＩｆｉｌＶｃ
おいては、上記電線の外周部に別工程で上記スパイラル
はラドを巻回して装着する必要があるうえ、装着すべき
スパイラルロッドの本数が極めて多量となる為、附帯工
数が激増し不経済であるという欠点があった。However, the above conventional low wind noise ffi electric IfilVc
In this case, it is necessary to attach the spiral to the outer circumference of the electric wire by winding the wire in a separate process, and since the number of spiral rods to be attached is extremely large, the additional man-hours increase dramatically, making it uneconomical. There was a drawback.

このため、上記電線の素線として例えばその断面が涙滴
状のものを複数本用意し、これら素線を上記電線の最外
層を形成する際に、突出部を外方に向けて適宜配置する
ことにより、上記電線を製造する際に同時忙その表面に
凹凸を形成するようにした低風騒音型電線も提案されて
いる。For this reason, a plurality of wires having teardrop-shaped cross sections, for example, are prepared as the wires of the electric wire, and when forming the outermost layer of the wire, these wires are appropriately arranged with the protruding portions facing outward. Accordingly, a low wind noise type electric wire has been proposed in which unevenness is formed on the surface of the electric wire at the same time as when manufacturing the electric wire.

しかしながらこのような電線においては、その表面に凹
凸を形成するための上記素線の突出部の高さが低いと、
当然のことながらカルマン渦の発生を不規則なものとす
ることができなくなって充分な効果を期待することがで
きず、他方充分な効果を得るために上記突出部の高さを
高くすると、その突出部が全体として鋭角的なものにな
シ、そのため架線作業において延線車や釣車等を通過す
る際に電Ｍｉｌに作用する圧力が上記の鋭角化した突出
部九集中荷重として加わる恐れが発生し、そのため突出
部を有する素線が隣接している素線から陥没してしまう
とともに、隣接の素線が逆に浮び上ってしまう素線関の
相対的位置ずれが発生し、撚り合わせ状態および形状の
乱れた電線が架設されてしまう恐れが生じるものであっ
た。However, in such an electric wire, if the height of the protrusion of the wire for forming unevenness on the surface is low,
Naturally, it becomes impossible to make the generation of Karman vortices irregular, and a sufficient effect cannot be expected. On the other hand, if the height of the above-mentioned protrusion is increased in order to obtain a sufficient effect, The protrusions as a whole are not sharp-angled, so there is a risk that the pressure acting on the electrical cable when passing through a railroad car, fishing cart, etc. during overhead line work will be applied as a concentrated load on the acute-angled protrusions. As a result, the strands with protrusions sink in from the adjacent strands, and the adjacent strands conversely rise up, resulting in a relative positional shift of the strands, which makes it difficult to twist the strands together. There is a risk that electric wires that are in a disordered condition or shape may be installed.

〔発明の目的〕[Purpose of the invention]

この発明は上記事情）Ｃｆｆｉみてなされたもので、風
騒音の防止効果に優れるとともに、架線作業時等に撚り
の乱れや形削れなどを生じる恐れのない低風騒音Ｗ電線
を提供することを目的とするものである。This invention was made in view of the above-mentioned circumstances), and aims to provide a low wind noise W electric wire that is excellent in preventing wind noise and is free from the risk of twisting disorder or deformation during overhead line work. That is.

〔発明の構成］ この発明の低風騒音型電線は、裸撚纏の最外層を断面截
頭扇形の複数寥のセグメント素線と、上記セグメント素
線の外肩部に断面円弧状の膨出部を一体く設けてなる少
なくとも２本以上の異形断面素線とを混撚）したものに
て形成し、かつ上記異形断面素線の膨出部の膨出高さΔ
Ｒと最外７１ｉｌａ線の半径Ｒとの比ΔＲ／Ｒをα１５
から０．４５までの範囲内とさせてなるものである。[Structure of the Invention] The low wind noise type electric wire of the present invention includes a plurality of segment wires having a truncated fan-shaped cross section in the outermost layer of the bare twisted wire, and a bulge having an arcuate cross section at the outer shoulder portion of the segment wire. The bulge height Δ of the bulge of the bulge of the irregular cross-section strand is formed by mixing and twisting at least two or more irregular cross-section strands integrally provided, and the bulge height of the bulge of the irregular cross-section strand
The ratio ΔR/R of R and the radius R of the outermost 71ila line is α15
to 0.45.

〔実施例〕〔Example〕

第１図および第２図はそれぞれこの発明の低風騒音型電
線を光ファイバ複合条空地！ｉＫ適用した例を示すもの
で、全体として符号１で示すものが光ファイバ複合架空
地線である。この光ファイバ複合架空地線１は光ファイ
バ２を収納したアルミニウム等からなる金属パイプ３の
外周九内Ｎ４と外層５とが順次積層されてなるものであ
る。上記内層４は金属パイプ３の外周に、断面截頭扇形
で周囲にアルミニウム被覆層６を有する複数本の鋼製の
セグメント素＃Ｊ！７・・・を撚り合わせて形成したも
ので、この内層４の外周に上記外層５が設けられている
。Figures 1 and 2 respectively show the low wind noise type electric wire of this invention in an optical fiber composite strip open space! This shows an example in which iK is applied, and the one designated as a whole by reference numeral 1 is an optical fiber composite overhead ground wire. This optical fiber composite overhead ground wire 1 is made by sequentially laminating the outer periphery N4 and the outer layer 5 of a metal pipe 3 made of aluminum or the like in which an optical fiber 2 is housed. The inner layer 4 is made of a plurality of steel segment elements #J, which have a truncated fan-shaped cross section and an aluminum coating layer 6 around the outer periphery of the metal pipe 3. 7... are twisted together, and the outer layer 5 is provided around the outer periphery of the inner layer 4.

上記外層（最外層撚ＩＭ）５は、アルミニウムやアルミ
合金等の金属からなる断面截頭扇形の複数本のセグメン
ト素線８と、上記セグメント素線の外周ＷＫ断面円弧状
の膨出部９を一体に設けてなる２本の異形断面素線１０
とを混撚シして形成したもので、第１図の実施例におい
ては雨具形断面素線１０Ｆ１円周方向に１８チ離れた直
径上の対称位置く配置づれており、また第２図の実施例
においては上記雨具通断面素ａｌＯが円周方向く７を離
れた非対称位置に配置されている。そして図中＾Ｒで示
す上記膨出部９の膨出高さと、Ｒで示す最外層撚［５の
半径との比ΔＲ／Ｒはα１５以上で（１４５以下とされ
ている。The outer layer (outermost layer twisted IM) 5 includes a plurality of segment wires 8 made of metal such as aluminum or aluminum alloy and having a truncated fan-shaped cross section, and a bulge portion 9 having an arcuate cross section on the outer circumference WK of the segment wire. Two irregular cross-section strands 10 provided integrally
In the embodiment shown in FIG. 1, the rain gear-shaped cross-section strands 10F1 are arranged at diametrically symmetrical positions 18 inches apart in the circumferential direction, and in the embodiment shown in FIG. In this case, the rain gear passage element alO is arranged at an asymmetrical position apart from 7 in the circumferential direction. The ratio ΔR/R of the bulge height of the bulge portion 9, indicated by ^R in the figure, and the radius of the outermost layer twist [5, indicated by R, is α15 or more (145 or less).

ここで第５図は上記−Ｒ／Ｈの適正値を得るために行な
った実験結果を示すグラフで、風速Ｖ−２０ｍ／Ｓにお
いて横軸に示したΔＲ／Ｒの値を各々変化させた場合の
風音低減量（０．Ｂ（０））をそれぞれ縦軸に示したも
のである。ｊＩ３図に示すグラフから明らかなように、
ＡＲ／Ｒの値が０．１５未満では充分な風騒音の低減効
果を得ることができず、またα４５を越えても上記風騒
音の低減効果はもはや増大が望めず、さらに膨出部９０
重量が急激に増加してゆくため、光ファイバ複合条空地
！１の自重の増加が無視し得なくな、り不適当である。Here, Figure 5 is a graph showing the results of an experiment conducted to obtain the appropriate value of -R/H above, where the value of ΔR/R shown on the horizontal axis was changed at a wind speed of V-20 m/S. The wind noise reduction amount (0.B(0)) is shown on the vertical axis. As is clear from the graph shown in Figure jI3,
If the value of AR/R is less than 0.15, a sufficient wind noise reduction effect cannot be obtained, and even if the value of AR/R exceeds α45, the above-mentioned wind noise reduction effect can no longer be expected to increase.
Due to the rapid increase in weight, optical fiber composite strip vacant land! The increase in the dead weight of 1 cannot be ignored, which is inappropriate.

したがって上記ΔＲ／Ｒの値はα１５〜０．４５の範囲
が最適なものと言える。Therefore, it can be said that the optimum value of ΔR/R is in the range of α15 to 0.45.

この工うに外層５に上記の如き膨出部９を有する光ファ
イバ複合架空地線（低風騒音型電線）ＩＫよればカルマ
ン渦の規則的な発生を防止して風騒音を大巾に低減する
ことができる。しかも上記光ファイバ複合条空地［１の
外層５が断面截頭扇形のセグメント素線８およびそのセ
グメント素線の外周部に断面円弧状の膨出部９を一体に
設けてなる異形断面素１Ｍ１０とくよって構成されてい
るので、架線作業時等に異形断面素１１ａｌｏの上記膨
出部９に集中荷重が加わっても、所謂〈ζび効果により
上記荷重が隣接するセグメント素線８を反対の方向に押
し開く円周方向の力に変換され、かつその力が上記外層
５０周方向で互いに打ち消し合うために、外層５の形状
保持力が強固であり、したがって丸断面の素ｍ１ｌＶｃ
て構成される場合と異なり、外層５に撚）合わせ状態や
断面外周形状の乱れが発生する恐れがない。また上記膨
出部９は断面形状が扇形であり、その表面が滑らかな円
弧面であるために圧潰損傷の恐れなく延線車や釣車等を
容易に通過し得るものである。そしてこれらのために、
金属パイプ３やその内部の光ファイバ２にもラジアル方
向の有害な力が作用しないものである。According to this method, the optical fiber composite overhead ground wire (low wind noise type electric wire) IK having the above-mentioned bulge 9 on the outer layer 5 prevents the regular occurrence of Karman vortices and greatly reduces wind noise. be able to. In addition, the outer layer 5 of the optical fiber composite strip open space [1] is an irregular cross-section element 1M10 in which the outer layer 5 of the optical fiber composite strip [1] is integrally formed with a segment wire 8 having a truncated fan-shaped cross section and a bulge portion 9 having an arcuate cross section on the outer periphery of the segment wire. Therefore, even if a concentrated load is applied to the bulging portion 9 of the irregular cross-section element 11alo during overhead line work, the load will not move the adjacent segment element wire 8 in the opposite direction due to the so-called <ζ effect. Since the force is converted into a force in the circumferential direction to push it open, and the force cancels each other in the circumferential direction of the outer layer 50, the shape retention force of the outer layer 5 is strong, and therefore the shape of the element m1lVc with a round cross section is
Unlike in the case where the outer layer 5 is configured with two layers, there is no possibility that the twisted state or the cross-sectional outer circumferential shape of the outer layer 5 will be disturbed. Further, the bulged portion 9 has a fan-shaped cross section and a smooth arcuate surface, so that it can easily pass through a railroad track wheel, a fishing wheel, etc. without fear of crushing damage. And for these,
No harmful force in the radial direction acts on the metal pipe 3 or the optical fiber 2 inside it.

〔実験例］ 第４図はこの発明に係る低風騒音型電線の実施例による
風騒音低減効果の実験結果を示すグラフである。[Experimental Example] FIG. 4 is a graph showing the experimental results of the wind noise reduction effect of an embodiment of the low wind noise electric wire according to the present invention.

図において、横軸は図中人、Ｂ、Ｃ，Ｄで示す各電線が
風速Ｖ＝２５ｍ／Ｓにおいて発する風騒音を周波数分析
器で分析した周波数（Ｈｚ）を、また縦軸はその周波数
における音圧レベルＬ　（ｄ、Ｂ（０））を示すもので
ある。ここで電線人は外径２０關の通常の電線（ＩＡＣ
８Ｒ／人Ｗ）を、電線Ｂは上記電線λに外径２６Ｂのア
ルζ合金スパイラルロッドを１２００ピツチで巻回した
ものを、そして電線Ｃ及びＤはそれぞれ本発明の実施例
で、電線Ｃは最外層５の外径が１７．６鵡でかつ円周方
向く１８０’離れた直径上の対称位置く＾Ｒ−＝１．８
鶴の膨出部９を有する異形断面素８１０を配置したもの
を、また電線りは同寸法の異形断面素線１０を円周方向
に７２’離れた位置に配置したものをそれぞれ示し、Ｅ
は暗騒音の値を示すものである。In the figure, the horizontal axis is the frequency (Hz) obtained by analyzing the wind noise generated by each electric wire indicated by B, C, and D in the figure at a wind speed of V = 25 m/s using a frequency analyzer, and the vertical axis is the frequency at that frequency. This shows the sound pressure level L (d, B(0)). Here, the electric wire person is a normal electric wire (IAC) with an outer diameter of 20
8R/person W), wire B is made by winding an aluminum ζ alloy spiral rod with an outer diameter of 26B at 1200 pitches around the above wire λ, wires C and D are examples of the present invention, and wire C is The outer diameter of the outermost layer 5 is 17.6 cm, and the diametrically symmetrical position 180' apart in the circumferential direction is R-=1.8.
E shows an arrangement in which odd-shaped cross-section elements 810 having a crane-like bulge 9 are arranged, and an electric wire in which odd-shaped cross-section elements 10 of the same size are arranged at positions 72' apart in the circumferential direction.
indicates the value of background noise.

図からも明らかなように、この発明に係る低風騒音型電
線Ｃ％Ｄでは風騒音レベルが通常の無対策の電線へに比
べて格段に低くなっており、さらに電ｍｃにあってはス
パイラルロッドを巻回して風騒音対策を施した電線Ｂと
比較してもより一層その効果が優れたものとなっている
。As is clear from the figure, the wind noise level of the low wind noise type electric wire C%D according to the present invention is much lower than that of ordinary electric wires without countermeasures, and furthermore, the spiral The effect is even more excellent when compared to electric wire B, in which wind noise countermeasures are taken by winding the rod.

なお、上記実施例および実験例においては、膨出部９を
有する２本の異形断面素線１０を組み込んだものを示し
であるが、これに限らず、その本　表電線を光ファイバ
複合架空地線として構成した例を示したがと九に限るも
のではなく、例えば第５図や第６図に示すように通常の
送電線１１，１２の最外層５Ａ、５８に適用しても全く
同様の効果を得ることができる。In addition, in the above-mentioned Examples and Experimental Examples, two wires 10 of irregular cross section each having a bulging portion 9 are incorporated, but the present invention is not limited to this. Although the example is shown in which it is configured as a power transmission line, it is not limited to this, and even if it is applied to the outermost layers 5A and 58 of ordinary power transmission lines 11 and 12 as shown in FIGS. 5 and 6, the same result can be obtained. effect can be obtained.

〔発明の効果〕〔Effect of the invention〕

以上の説明から明らかなよう忙、この発明の低風騒音ｍ
’ｒｔｍＫよれば風騒音レベルを大巾に低減することが
できるとともに、最外層が半径方向く作用する力に対し
て強く１．よって膨出部に集中荷重が加わっても素環が
陥没して撚シ崩れや形状の乱れ等を発生する恐れがない
。また上記膨出部は表面が滑らかな円弧状をなすもので
あるため、圧潰の恐れなく延線車や釣車等を円滑に通過
することができ、そのため架設後に先鋭状の突起となっ
てｂロナ発生要因となる友どの恐れも生じないものであ
る。As is clear from the above description, the low wind noise of this invention
With 'rtmK, the wind noise level can be significantly reduced, and the outermost layer is strong against forces acting in the radial direction. Therefore, even if a concentrated load is applied to the bulging portion, there is no fear that the ring will cave in and cause the twist to collapse or the shape to be disturbed. In addition, since the surface of the bulge is in the shape of an arc, it can pass smoothly through railway cars, fishing wheels, etc. without fear of being crushed. There is no need to worry about any of your friends becoming a cause of Rona outbreak.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図および＄２図は各々この発明の低風騒音型電線の
実施例な示す概略横断面図、第３図はａｌ（／Ｒと風音
の低減量との関係を示すグラフ、第４図はこの発明の実
施例による実験結果を示すグラフ、第５図および第６図
はそれぞれこの発明の他の実施例を示す概略横断面図で
ある。 ５・・・・・・最外層、８・・・・・・セグメント素線
、９・・・・・・膨出部、ｌＯ・・・・・・異形断面素
線、Δ・Ｒ・・・・・・膨出部の膨出高さ、Ｒ・・・・
・・最外層の半径。 第１図 第２図Figures 1 and 2 are schematic cross-sectional views showing examples of low wind noise electric wires of the present invention, Figure 3 is a graph showing the relationship between al(/R and wind noise reduction amount, and Figure 4 The figure is a graph showing experimental results according to an embodiment of the present invention, and Figs. 5 and 6 are schematic cross-sectional views showing other embodiments of the present invention. 5... Outermost layer, 8 ...Segment strand, 9...Bulging part, lO...Irregular cross-section strand, Δ・R...Bulging height of bulging part ,R...
...The radius of the outermost layer. Figure 1 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 裸撚線の最外層が、断面截頭扇形の複数本のセグメント
素線と、上記セグメント素線の外周部に断面円弧状の膨
出部を一体に設けてなる少なくとも２本以上の異形断面
素線を混撚りしたものにて形成され、かつ上記異形断面
素線の膨出部の膨出高さΔＲと最外層撚線の半径Ｒとの
比ΔＲ／Ｒが０．１５から０．４５までの範囲内とされ
ていることを特徴とする低風騒音型電線。The outermost layer of the bare stranded wire is composed of a plurality of segment wires having a truncated fan-shaped cross section, and at least two or more irregular cross-section wires each having a bulge having an arcuate cross section integrally provided on the outer periphery of the segment wire. The wire is formed by mixedly twisted wires, and the ratio ΔR/R of the bulge height ΔR of the bulge part of the irregular cross-section wire to the radius R of the outermost layer strand is from 0.15 to 0.45. A low wind noise type electric wire characterized by being within the range of .