JP3972130B2

JP3972130B2 - Vertical 2 conductor V suspension system

Info

Publication number: JP3972130B2
Application number: JP20526296A
Authority: JP
Inventors: 利幸田原; 健児柴田; 誠一近藤; 克雄織部; 博文坂本
Original assignee: Chubu Electric Power Co Inc
Current assignee: Chubu Electric Power Co Inc
Priority date: 1996-07-16
Filing date: 1996-07-16
Publication date: 2007-09-05
Anticipated expiration: 2016-07-16
Also published as: JPH1031922A

Description

【０００１】
【発明の属する技術分野】
本発明は、垂直２導体用Ｖ吊懸垂装置に関する。
【０００２】
【従来の技術】
一般的に、２導体用Ｖ吊懸垂装置は、一対のがいし連の下端部にヨーク金具を取付けてＶ型に形成され、そのヨーク金具に導体を掌握する懸垂クランプを２個枢着して構成されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来の２導体用Ｖ吊懸垂装置は、ヨーク金具に２個の懸垂クランプを水平に並ぶように取り付けているので、２条の導体が鉄塔から離れる水平方向に配設されるために線下補償費がかさむ欠点があった。
【０００４】
このような欠点を解消するために、１条導体用の懸垂クランプの下部にもう一つの１条導体用の懸垂クランプを取付けて、２条の導体を垂直方向に配設して垂直２導体とすることも考えられるが、この場合は、クランプの連結構造が複雑になり、コスト高になってしまい現実的でない。
【０００５】
ところで、垂直２導体は、２導体相互をスペーサで結合した場合は、上条の導体に対する下条の導体のべートダンパー（bate damper）効果によって、導体相互の制振特性が良好になるという特長があるといわれている。
【０００６】
そこで、本発明は、２導体を垂直２導体としたときの上記特長を活かしつつ、上記欠点を解決するためになされたものであって、その第一の目的は、構成が簡単なヨーク金具を用いて２導体を垂直に配列できるようにすることにある。垂直２導体とする場合は、鉄塔に張設される導体が水平角を有するときは、ヨーク金具に加わる導体荷重のうちの水平分力により好ましくないモーメントが働く。従って、ヨーク金具の構成及び懸垂クランプの取付位置は、そのヨーク金具に水平角を有する導体を吊下したときに回転モーメントを生じないものであることが望まれる。そこで、本発明の第２の目的は、水平角を有する場合に適用することができる垂直２導体用Ｖ吊懸垂装置を提供することにある。
【０００７】
【課題を解決するための手段】
上記目的を達成するために、本発明は、（Ａ）上端が鉄塔アームの離れた位置に支持された一対のがいし連の下端部にヨーク金具を枢着し、そのヨーク金具の上下２カ所に懸垂クランプを揺動自在に取り付けてなり、前記鉄塔に張設される導体が水平角を有しない場合に用いられる垂直２導体用Ｖ吊懸垂装置において、（ａ１）ヨーク金具を、両端が前記一対のがいし連のそれぞれの下端部に枢着される上辺部と、その上辺部の前記一対のがいし連との枢着点の間のほぼ中央から下方に離れた位置に設けられた下端部と、前記上辺部と前記下端部を連結し、上側の懸垂クランプを収容するための鉄塔側に開口する凹部を形成する連結部とを備えて一体に構成し、（ｂ１）ヨーク金具の上辺部に上側の懸垂クランプの取付点及びヨーク金具の下端部に下側の懸垂クランプの取付点を、それぞれ、両がいし連の長手方向中心線の交点を通る垂直線上に設けたこと、を特徴としている（請求項１）。
上記構成により、上下の懸垂クランプの取付点が共通の垂直線上に存在し、かつ、上下の懸垂クランプに掌握される２導体の重心が両がいし連の長手方向中心線の交点を通る垂直線上のその交点よりも下側に位置することとなる。
【０００８】
また、本発明は、（Ａ´）上端が鉄塔アームの離れた位置に支持された一対のがいし連の下端部にヨーク金具を枢着し、そのヨーク金具の上下２カ所に懸垂クランプを揺動自在に取り付けてなり、前記鉄塔に張設される導体が水平角を有する場合に用いられる垂直２導体用Ｖ吊懸垂装置において、（ａ１´）ヨーク金具を、両側が前記一対のがいし連のそれぞれの下端部に枢着される上辺部と、その上辺部の前記一対のがいし連との枢着点の間のほぼ中央から下方に離れた位置に設けられた下端部と、前記上辺部と前記下端部を連結し、上側の懸垂クランプを収容するための側方に開口する凹部を形成する連結部とを一体に備えて構成し、（ｂ１´）ヨーク金具の上辺部に上側の懸垂クランプの取付点及びヨーク金具の下端部に下側の懸垂クランンプの取付点を、それぞれ、両がいし連の長手方向中心線の交点を通る垂直線から前記導体の前記水平角に基づく振れ方向に所定距離ずらした位置に設けたことを特徴としている（請求項２）。
上記構成により、導体の水平角に応じて生じる導体の振れ角に基づく導体荷重の水平分力によりヨークに加わる回転モーメントが打ち消され又は軽減される。
【０００９】
さらに、本発明は、（Ａ）上端が鉄塔アームの離れた位置に支持された一対のがいし連の下端部にヨーク金具を枢着し、そのヨーク金具の上下２カ所に懸垂クランプを揺動自在に取り付けてなり、前記鉄塔に張設される導体が水平角を有しない場合に用いられる垂直２導体用Ｖ吊懸垂装置において、（ａ２）前記ヨーク金具を、両端が前記一対のがいし連のそれぞれの下端部に枢着される補助ヨーク金具と、その補助ヨーク金具の下側部の中央に上端が枢着された連結金具と、その連結金具の下端に枢着された主ヨーク金具とから構成するとともに、（ａ１”）主ヨーク金具を、連結金具の下端に枢着される上辺部と、その上辺部の下方に離れた位置に設けられた下端部と、前記上辺部と前記下端部を連結し、前記上側の懸垂クランプを収容するための側方に開口する凹部を形成する連結部とを一体に備えて構成し、（ｂ２）前記主ヨーク金具の上辺部に前記上側の懸垂クランプの取付点及び前記主ヨーク金具の下端部に下側の懸垂クランプの取付点を、それぞれ、前記両がいし連の長手方向中心線の交点を通る垂直線上に設けたことを特徴としている（請求項３）。
上記構成により、上下の懸垂クランプの取付点が共通の垂直線上に存在し、かつ、上下の懸垂クランプに掌握される２導体の重心が両がいし連の長手方向中心線の交点を通る垂直線上のその交点よりも下側に位置することとなる。
【００１０】
そして、本発明は、（Ａ´）上端が鉄塔アームの離れた位置に支持された一対のがいし連の下端部にヨーク金具を枢着し、そのヨーク金具の上下２カ所に懸垂クランプを揺動自在に取り付けてなり、前記鉄塔に張設される導体が水平角を有する場合に用いられる垂直２導体用Ｖ吊懸垂装置において、（ａ２）前記ヨーク金具を、両端が前記一対のがいし連のそれぞれの下端部に枢着される補助ヨーク金具と、その補助ヨーク金具の下側部の中央に上端が枢着された連結金具と、その連結金具の下端に枢着された主ヨーク金具とから構成するとともに、（ａ１”）前記主ヨーク金具を、前記連結金具の下端に枢着される上辺部と、その上辺部の下方に離れた位置に設けられた下端部と、前記上辺部と前記下端部を連結し、前記上側の懸垂クランプを収容するための側方に開口する凹部を形成する連結部とを一体に備えて構成し、（ｂ２´）前記主ヨーク金具の上辺部に前記上側の懸垂クランプの取付点及び前記主ヨーク金具の下端部に下側の懸垂クランプの取付点を、それぞれ、前記両がいし連の長手方向中心線の交点を通る垂直線から前記導体の水平角に基づく振れ方向に所定距離ずらした位置に設けたことを特徴としている（請求項４）。
上記構成により、導体の水平角に応じて生じる導体の振れ角に基づく導体荷重の水平分力によりヨークに加わる回転モーメントが打ち消され又は軽減される。
【００１１】
請求項４の発明において、（ｂ２”）上側の懸垂クランプの取付点及び下側の懸垂クランプの取付点を、それぞれ、両がいし連の長手方向中心線の交点を通る垂直線から前記導体の水平角に基づく振れ方向に所定距離ずらした位置を通る垂直線上に設けることが望ましい（請求項５）。
上記構成により、上下の懸垂クランプの取付点が共通の垂直線上に存在し、かつ、導体の水平角に応じて生じる導体の振れ角に基づく導体荷重の水平分力によりヨークに加わる回転モーメントが打ち消される。
【００１２】
そして、本発明は、請求項５の垂直２導体用Ｖ吊懸垂装置において、（ｃ）主ヨーク金具の連結金具との枢着点を通る垂直線から上下の懸垂クランプの取付点を通る垂直線までの距離Ｌ3 は、主ヨーク金具の連結金具との枢着点から上側の懸垂クランプの取付点までの垂直面に対する投影距離をＬ1 、上側の懸垂クランプの取付点から下側の懸垂クランプの取付点までの距離をＬ2 、上側の懸垂クランプに掌握される導体の水平荷重及び垂直荷重をＨ1 ，Ｖ1 、下側の懸垂クランプに掌握される導体の水平荷重及び垂直荷重をＨ2 ，Ｖ2 とすると、式
Ｌ3 ＝［（Ｈ1 ×Ｌ1 ）＋｛Ｈ2 ×（Ｌ1 ＋Ｌ2 ）｝］／（Ｖ1 ＋Ｖ2 ）
により設定されていることを特徴としている（請求項６）。
【００１３】
【発明の実施の形態】
図１は、本発明の第１の実施の形態に係る垂直２導体用Ｖ吊懸垂装置であって、導体の張設方向から見た送電線鉄塔ＴのアームＡ部分の正面図で、導体岐出方向が直線状の場合、すなわち水平角０の場合の垂直２導体用Ｖ吊懸垂装置（以下、単にＶ吊懸垂がいし装置という場合がある。）を示している。
【００１４】
図中、１は垂直２導体用Ｖ吊懸垂がいし装置であって、周知のＶ吊懸垂がいし装置と同様に、アークホーンを備えた懸垂がいしからなる一対のがいし連１ａ，１ｂをアームＡから垂下し、それらのがいし連の下端部に単体のヨーク金具Ｙ1 を枢着してＶ字状に結合して構成されている。
【００１５】
ヨーク金具Ｙ1 は、両端側ががいし連１ａ，１ｂの下端部がそれぞれ回動自在に連結されている上辺部Ｙ1 ａと、その上辺部のがいし連１ａ，１ｂとの枢着点の間のほぼ中央の下方に設けられた下端部Ｙ1 ｂと、上辺部Ｙ1 ａと下端部Ｙ1 ｂを連結し、鉄塔側に開口する凹部Ｙ1 ｄを形成するように屈曲又は湾曲された連結部Ｙ1 ｃとを一体に有して、一例として、略フ字状を呈している。凹部Ｙ1 ｄは、ここに後述される懸垂クランプを揺動自在に懸垂し、上側の導体Ｄ1 の出入れができる大きさである。なお、「フ字状」の形状は、三日月状又は半リング状を含む。
【００１６】
このヨーク金具Ｙ1 は、凹部Ｙ1 ｄの開口方向が送電線鉄塔Ｔ側を向くようにがいし装置１に連結される。このため、ヨーク金具Ｙ１と送電線鉄塔Ｔとの絶縁間隔を大きくとることができる。
【００１７】
２導体Ｄ1 ，Ｄ2 のうち、上方に位置する導体Ｄ1 は、ヨーク金具Ｙ1 の上辺部Ｙ1 ａの下部に取り付けられた懸垂クランプＣ1 に、また、下方に位置する導体Ｄ2 は、ヨーク金具Ｙ１の下端部Ｙ1 ｂにその下端部から下方に懸垂されるように取り付けられた懸垂クランプＣ2 に掌握される。そして、水平角の無い場合に用いられるヨーク金具Ｙ 1 に設けられる各懸垂クランプＣ1 ，Ｃ2 の取付孔ｂ1 ，ｂ2 は次の位置関係を有している。
【００１８】
すなわち、取付孔ｂ1 ，ｂ2 は、一対のがいし連１ａ，１ｂの長手方向の中心線ａ1 ，ａ2 の交点Ｏ1 を通る垂直線ａ3 上に位置している。この垂直線ａ3 は、上記中心線ａ1 ，ａ2 により形成される角度を２等分する関係にある（図１のθ1 ＝θ2 参照）。そして、懸垂クランプＣ1 ，Ｃ2 に掌握される導体Ｄ1 ，Ｄ2 の重心Ｏ2 は、垂直線ａ3 上の交点Ｏ1 よりも下側に位置している。
【００１９】
ヨーク金具Ｙ１の等荷支持点（導体Ｄ1 ，Ｄ2 の重心Ｏ2 ）が上記垂直線ａ3 上に位置していると、上記一対のがいし連１ａ，１ｂの分担荷重を等しくすることができる。すなわち、この垂直線ａ3 は、後述の図５の荷重線に相当し、したがって、ヨーク金具Ｙ１の等荷支持点（導体Ｄ1 ，Ｄ2 の重心Ｏ2 ）がこの垂直線ａ3 上で、かつ、交点Ｏ1 よりも下側に設けてある限り、がいし連１ａ，１ｂの分担荷重のバランスをとることが可能であり、ヨーク金具Ｙ1 は高い安定性を維持し、上下の懸垂クランプＣ1 ，Ｃ2 に掌握される２導体Ｄ1 ，Ｄ2 は垂直線ａ3 上に保持されることを意味している。
【００２０】
図２は、本発明の第２の実施の形態に係る垂直２導体用Ｖ吊懸垂装置を示す。これも、水平角が無い場合に用いられるものであるが、上述の例と異なる点は、ヨーク金具Ｙ２が、両端部上側ががいし装置１の下端部に枢着された補助ヨーク金具Ｙ２１と、その補助ヨーク金具の中央下部に上端が枢着された連結金具Ｙ２２と、その連結金具の下端に枢着された主ヨーク金具Ｙ２３との３部材から構成されていることである。主ヨーク金具Ｙ２３は、第１の実施の形態におけるヨーク金具Ｙ1 と類似の形状を有し、上辺部Ｙ２３ａと下端部Ｙ２３ｂと連結部Ｙ２３ｃとを一体に有し、鉄塔側に開口する凹部Ｙ２３ｄが形成されている。そして、上辺部Ｙ２３ａの下部と下端部Ｙ２３ｂに懸垂クランプＣ1 ，Ｃ2 の取付孔ｂ1 ，ｂ2 が設けられている。
【００２１】
補助ヨーク金具Ｙ２１は、一対のがいし連１ａ，１ｂの下端同志を結合する役目を有し、その補助ヨーク金具Ｙ２１における上述の垂直線ａ3 の通る線上に、連結金具Ｙ２２の上部の取付孔２ａ、下部の取付孔２ｂ、及び主ヨーク金具Ｙ２３の懸垂クランプＣ1 ，Ｃ2 の取付孔ｂ1 ，ｂ2 がそれぞれ位置している。
【００２２】
本実施の形態のように、懸垂クランプＣ1 ，Ｃ2 を取り付けた主ヨーク金具Ｙ２３が、連結金具Ｙ２２及び補助ヨーク金具Ｙ２１に順次枢着されているときは、導体Ｄ1 ，Ｄ2 に横風が作用したときのがいし連１ａ，１ｂへの影響を緩和することができる。
【００２３】
図３は、図１に示された単体のヨーク金具Ｙ1 を有する垂直２導体用Ｖ吊懸垂装置を、導体Ｄ1 ，Ｄ2 が水平角を有する場合に用いられる傾斜Ｖ吊装置に適用した状態を示している。
【００２４】
この傾斜Ｖ吊装置においては、がいし装置１′が、一対のがいし連１ａ，１ｂの分担荷重が常態において同一となるように、一方のがいし連１ａの上部が補助アームＡ′の下部に連結されている。従って、両中心線ａ1 ，ａ2 で形成される角度をその中心線ａ1 ，ａ2 の交点Ｏ１を通る垂直線ａ3 で分割したときの角度θ1 ，θ2 は、一方のがいし連１ａの上部が補助アームＡ′の長さ分だけ下方に下ったことにより、がいし連１ａの側の角度θ1 ががいし連１ｂの角度θ2 よりも大きくなる（図３のθ1 ＞θ2 参照）。
【００２５】
そして、導体の水平角に起因して、それぞれの導体に水平角の内側方向（図３の導体においては鉄塔Ｔから離れる方向）の引っ張り力が作用するため、懸垂クランプＣ1 ，Ｃ2 と導体Ｄ1 ，Ｄ2 が同じく右側に振れて傾斜し(この場合の傾斜角を振れ角という。)、その傾斜した状態で、各がいし連１ａ，１ｂの分担荷重と導体荷重との均衡が取れて停止する。ここで、懸垂クランプＣ1 ，Ｃ2 の取付孔ｂ1 ，ｂ2 の位置は、一対のがいし連１ａ，１ｂの長手方向の中心線ａ1 ，ａ2 の交点Ｏ１を通る垂直線ａ3 よりも右側（導体の振れ方向側）に位置されている。
【００２６】
図４は、図２で説明した水平角０のときの補助ヨーク金具Ｙ２１，連結金具Ｙ２２，主ヨーク金具Ｙ２３からなる垂直２導体用Ｖ吊懸垂装置を、そのまま、水平角を有する場合のＶ吊装置に用いた例を示す。
この例においても、導体Ｄ1 ，Ｄ2 の水平角に起因して、それぞれの導体に水平角の内側方向（図４の導体においては鉄塔から離れる方向）の引っ張り力が作用するため、懸垂クランプＣ1 ，Ｃ2 と導体Ｄ1 ，Ｄ2 が同じく右側に振れて傾斜し、懸垂クランプＣ1 ，Ｃ2 の取付孔ｂ1 ，ｂ2 は、垂直線ａ3 よりも右側に位置することとなる。
【００２７】
なお、ヨーク金具Ｙ2 、補助ヨーク金具Ｙ２１及び主ヨーク金具Ｙ２３は、鉄塔の両側のそれぞれについて専用とすることもできるが、ヨーク金具Ｙ2 、補助ヨーク金具Ｙ２１及び主ヨーク金具Ｙ２３に両側用の取付孔をそれぞれ設けておいて、兼用することもできる。この場合は、在庫管理が容易になる特長がある。
【００２８】
図５は、上記図２の垂直２導体用Ｖ吊懸垂装置を図４のＶ吊装置に用いる場合に、上下の懸垂クランプＣ1 ，Ｃ2 に掌握される導体Ｄ1 ，Ｄ2 の重心を、懸垂クランプＣ1 ，Ｃ2の振れ角により生じる水平分力によりヨーク金具に加わるモーメントを打ち消す方向に移動し、かつ、懸垂クランプＣ1 ，Ｃ2 の取付孔ｂ1 ，ｂ2 が一つの共通な垂直線上に存在するように、取付孔ｂ1 ，ｂ2 の設置位置を水平角及び懸垂クランプＣ1 ，Ｃ2 の振れ角を考慮して決定する方法を説明するものである。
Ｙ２３’は、図２及び図４の主ヨーク金具Ｙ２３の取付孔ｂ1 ，ｂ2 を、水平角に対応して適正な位置に設けた主ヨーク金具である。鎖線ａ0 は、主ヨーク金具Ｙ２３を等荷的に支持するための荷重線（以下、鎖線ａ0 を荷重線という）であり、中心線ａ1 ，ａ2 （図４参照）の交点Ｏ1 と、連結金具Ｙ２２と主ヨーク金具Ｙ２３’の連結点である取付孔２ｂを通るとともに、交点Ｏ1 を通る垂直線ａ3、又は取付孔２ｂを通る垂直線ａ５に対してβの角度を有している。
【００２９】
この角度βは、導体Ｄ1 ，Ｄ2 の水平角に起因するものであり、したがって、上記図２の場合は、上述したように、荷重線ａ0 が垂直線ａ3 及び取付孔２ｂを通る垂直線と一致しているが、ここでは荷重線ａ0 が水平角に対応した角度βを有している。
【００３０】
さて、図５における各取付孔ｂ1 ，ｂ2 に懸垂クランプＣ1 ，Ｃ2 がそれぞれ取付けられて、これら懸垂クランプＣ1 ，Ｃ2 に導体Ｄ1 ，Ｄ2 が掌握されたときの各水平荷重をＨ1 ，Ｈ2 、垂直荷重をＶ1 ，Ｖ2 、及び振れ角（垂直方向に対する角度）をη1 ，η2 とすると、上，下の導体Ｄ1 ，Ｄ2 において、水平荷重Ｈ1 ，Ｈ2 が等しいときは、βは次式（１）により求めることができる。
式（１）
β＝ｔａｎ-1（（Ｈ1 ＋Ｈ2 ）／（Ｖ1 ＋Ｖ2 ））＝（η1 ＋η2 ）／２
（ただし右側の＝はニヤリイコール。（図５の（１）参照。）
【００３１】
また、上，下の導体Ｄ1 ，Ｄ2 の水平荷重Ｈ1 ，Ｈ2 が異なるときは、βは次式（２）により求めることができる。
式（２）
β＝ｔａｎ-1（（Ｈ1 ＋Ｈ2 ）／（Ｖ1 ＋Ｖ2 ））
（図５の（２）参照）。
【００３２】
上述の水平荷重Ｈ1 ，Ｈ2 が同一、又は異なるケースが生じる場合としては、既設送電線の地上高さを局部的に嵩上げしなければならない場合がある。これを図６を用いて説明すると、送電線鉄塔Ｔ1 において、各導体Ｄ1 ，Ｄ2 がアーム毎に１条ずつ懸垂され、次の送電線鉄塔Ｔ2 において垂直２導体に収束したとすると、導体Ｄ1 よりも導体Ｄ2 の方が長くなり、水平荷重Ｈ1 ，Ｈ2 に相違がでてくる。
【００３３】
これに対し、送電線鉄塔Ｔ3 に示されるように、送電線鉄塔Ｔ2 において、垂直２導体で懸垂されている導体Ｄ1 ，Ｄ2 を受け、さらに、垂直２導体で懸垂される図示しない送電線鉄塔に受け渡すときは、導体Ｄ1 ，Ｄ2 は同一長さとなり、水平荷重Ｈ1 ，Ｈ2 は同一となる。
【００３４】
いずれにしても、懸垂クランプＣ1 ，Ｃ2 に掌握された導体Ｄ1 ，Ｄ2 の重心位置をＯ2 とすると、主ヨーク金具Ｙ２３’と連結金具Ｙ２２の下端部の連結点（符号２ｂの位置）は、Ｏ1 とＯ2 を結ぶ直線上、すなわち、上述の角度βを保つ荷重線ａ0 上にある。なお、図３のヨーク金具Ｙ1 の場合は、図３のＯ1 が図５の荷重線ａ0 上に位置することとなる。
【００３５】
主ヨーク金具Ｙ２３’の取付位置２ｂ及び導体Ｄ1 ，Ｄ2 の重心位置Ｏ2 が上述の関係を有することは、換言すると、その取付位置２ｂを中心にした主ヨーク金具Ｙ２３’の回転モーメントが０であることを示している。したがって、荷重線ａ0 上の任意に定めた位置Ｏ2 を通る垂直線上のＯ2 の上下２箇所に取付孔ｂ1 ，ｂ2 を設けた場合に、各取付孔に取り付けた懸垂クランプＣ1 ，Ｃ2 に掌握された導体の重心位置がＯ2 の位置となる前記２箇所が取付孔ｂ1 ，ｂ2 を設けるべき位置である。これにより、常態における一対のがいし連１ａ，１ｂの分担荷重を所期の設計どおりに均等に保つことができ、このような関係を保つことにより、汎用性のあるヨーク金具とすることができる。
【００３６】
次に、主ヨーク金具Ｙ２３’の取付位置２ｂを基準にした場合の、荷重線ａ0 上の重心位置Ｏ2 及び懸垂クランプＣ1 ，Ｃ2 の取付孔ｂ1 ，ｂ2 の位置を求める方法について説明する。
【００３７】
図５に示すように、主ヨーク金具Ｙ２３’の取付孔２ｂを通る荷重線ａ0 が懸垂クランプＣ1 ，Ｃ2 の取付孔ｂ1 ，ｂ2 を通る垂直線ａ4 と交わる交点をＯ2 とし、取付孔２ｂから取付孔ｂ1 までの垂直面に対する投影距離をＬ1 、取付孔ｂ1 から取付孔ｂ2 までの距離をＬ2 とするとき、取付位置２ｂを通る垂直線ａ5 から上記垂直線ａ4 での距離Ｌ3 は、次式（３）で求められる（図５の（３）参照）。
式（３）
Ｌ3 ＝［（Ｈ1 ×Ｌ1 ）＋｛Ｈ2 ×（Ｌ1 ＋Ｌ2 ）｝］／（Ｖ1 ＋Ｖ2 ）
【００３８】
式（３）も、取付位置２ｂを中心にした主ヨーク金具Ｙ２３’の常態における回転モーメントが０であることを示している。
【００３９】
以上の式（１）−（３）において、振れ角η1 ，η2 は導体Ｄ1 ，Ｄ2 の荷重と水平角を基に計算によって求めることができ、従って、水平荷重Ｈ1 ，Ｈ2 、垂直荷重Ｖ1 ，Ｖ2 も計算により求めることができる。従って、式（１）（２）の右辺にη1 ，η2、Ｈ1 ，Ｈ2 、Ｖ1 ，Ｖ2 の実数値を代入することにより、荷重線ａ0の垂直線ａ５に対する角度βの具体値を得ることができる。そして、Ｌ1 とＬ2 は上下の導体間の所要距離に応じて任意に設定することができる。従って、式（３）の右辺の各項に実数値を代入することにより、Ｌ3 を確定することができる。
【００４０】
以上のように、本発明に係る垂直２導体用Ｖ吊懸垂装置は、単体のヨーク金具Ｙ1 を用いる実施の形態も、複合体のヨーク金具Ｙ２を用いる実施の形態も、懸垂クランプＣ1 ，Ｃ2 の取付孔ｂ1 ，ｂ2 の位置を適切に設定することにより、導体が水平角を有する場合にも常態における一対のがいし連１ａ，１ｂの分担荷重を均等に保つことができ、しかも、上下の導体を共通の垂直線上に懸垂することができる。
【００４１】
【発明の効果】
請求項１の発明によれば、（Ａ）上端が鉄塔アームの離れた位置に支持された一対のがいし連の下端部にヨーク金具を枢着し、そのヨーク金具の上下２カ所に懸垂クランプを揺動自在に取り付けてなり、前記鉄塔に張設される導体が水平角を有しない場合に用いられる垂直２導体用Ｖ吊懸垂装置において、（ａ１）ヨーク金具を、両端が前記一対のがいし連のそれぞれの下端部に枢着される上辺部と、その上辺部の一対のがいし連との枢着点の間のほぼ中央から下方に離れた位置に設けられた下端部と、前記上辺部と前記下端部を連結し、上側の懸垂クランプを収容するための鉄塔側に開口する凹部を形成する連結部とを備えて一体に構成し、（ｂ１）ヨーク金具の上辺部に上側の懸垂クランプの取付点及びヨーク金具の下端部に下側の懸垂クランプの取付点を、それぞれ、両がいし連の長手方向中心線の交点を通る垂直線上に設けたので、次の効果が得られる。すなわち、
第一に、簡単な構成で２導体用のＶ吊懸垂装置を提供することができる。第二に、上下の懸垂クランプの取付点が共通の垂直線上に存在するので、線下補償費の低減が可能である。第三に、上下の懸垂クランプに掌握される２導体の重心が両がいし連の長手方向中心線の交点を通る垂直線上のその交点よりも下側に位置するので、安定性の高い垂直２導体用のＶ吊懸垂装置を提供することができる。第四に、ヨーク金具の凹部が送電線鉄塔側に向けて開口されているので、ヨーク金具と送電線鉄塔との間隔が大きくなり、対地絶縁上、有利である。
【００４２】
請求項２の発明によれば、（Ａ´）上端が鉄塔アームの離れた位置に支持された一対のがいし連の下端部にヨーク金具を枢着し、そのヨーク金具の上下２カ所に懸垂クランプを揺動自在に取り付けてなり、前記鉄塔に張設される導体が水平角を有する場合に用いられる垂直２導体用Ｖ吊懸垂装置において、（ａ１´）ヨーク金具を、両側が前記一対のがいし連のそれぞれの下端部に枢着される上辺部と、その上辺部の一対のがいし連との枢着点の間のほぼ中央から下方に離れた位置に設けられた下端部と、前記上辺部と前記下端部を連結し、上側の懸垂クランプを収容するための側方に開口する凹部を形成する連結部とを一体に備えて構成し、（ｂ１´）ヨーク金具の上辺部に上側の懸垂クランプの取付点及びヨーク金具の下端部に下側の懸垂クランンプの取付点を、それぞれ、両がいし連の長手方向中心線の交点を通る垂直線から前記導体の前記水平角に基づく振れ方向に所定距離ずらした位置に設けたので、導体の水平角に応じて生じる導体の振れ角に基づく導体荷重の水平分力によりヨークに加わる回転モーメントが打ち消され又は軽減される。従って、水平角に基づく懸垂クランプの振れ角によってヨーク金具に回転モーメントが作用してヨーク金具が傾斜することが有効に防止されるため、上下の導体が一つの共通の垂直線上又はその付近に保持され、垂直２導体用Ｖ吊懸垂装置の利点が維持される。
【００４３】
請求項３の発明によれば、（Ａ）上端が鉄塔アームの離れた位置に支持された一対のがいし連の下端部にヨーク金具を枢着し、そのヨーク金具の上下２カ所に懸垂クランプを揺動自在に取り付けてなり、前記鉄塔に張設される導体が水平角を有しない場合に用いられる垂直２導体用Ｖ吊懸垂装置において、（ａ２）前記ヨーク金具を、両端が前記一対のがいし連のそれぞれの下端部に枢着される補助ヨーク金具と、その補助ヨーク金具の下側部の中央に上端が枢着された連結金具と、その連結金具の下端に枢着された主ヨーク金具とから構成するとともに、（ａ１”）主ヨーク金具を、連結金具の下端に枢着される上辺部と、その上辺部の下方に離れた位置に設けられた下端部と、前記上辺部と前記下端部を連結し、前記上側の懸垂クランプを収容するための側方に開口する凹部を形成する連結部とを一体に備えて構成し、（ｂ２）前記主ヨーク金具の上辺部に前記上側の懸垂クランプの取付点及び前記主ヨーク金具の下端部に下側の懸垂クランプの取付点を、それぞれ、前記両がいし連の長手方向中心線の交点を通る垂直線上に設けたので、次の効果が得られる。すなわち、
第一に、簡単な構成で２導体用のＶ吊懸垂装置を提供することができる。第二に、上下の懸垂クランプの取付点が共通の垂直線上に存在するので、線下補償費の低減が可能である。第三に、上下の懸垂クランプに掌握される２導体の重心が両がいし連の長手方向中心線の交点を通る垂直線上のその交点よりも下側に位置するので、安定性の高い垂直２導体用のＶ吊懸垂装置を提供することができる。
【００４４】
請求項４の発明によれば、（Ａ´）上端が鉄塔アームの離れた位置に支持された一対のがいし連の下端部にヨーク金具を枢着し、そのヨーク金具の上下２カ所に懸垂クランプを揺動自在に取り付けてなり、前記鉄塔に張設される導体が水平角を有する場合に用いられる垂直２導体用Ｖ吊懸垂装置において、（ａ２）前記ヨーク金具を、両端が前記一対のがいし連のそれぞれの下端部に枢着される補助ヨーク金具と、その補助ヨーク金具の下側部の中央に上端が枢着された連結金具と、その連結金具の下端に枢着された主ヨーク金具とから構成するとともに、（ａ１”）前記主ヨーク金具を、前記連結金具の下端に枢着される上辺部と、その上辺部の下方に離れた位置に設けられた下端部と、前記上辺部と前記下端部を連結し、前記上側の懸垂クランプを収容するための側方に開口する凹部を形成する連結部とを一体に備えて構成し、（ｂ２´）前記主ヨーク金具の上辺部に前記上側の懸垂クランプの取付点及び前記主ヨーク金具の下端部に下側の懸垂クランプの取付点を、それぞれ、前記両がいし連の長手方向中心線の交点を通る垂直線から前記導体の水平角に基づく振れ方向に所定距離ずらした位置に設けたので、導体の水平角に応じて生じる導体の振れ角に基づく導体荷重の水平分力によりヨークに加わる回転モーメントが打ち消され又は軽減される。従って、水平角に基づく懸垂クランプの振れ角によってヨーク金具に回転モーメントが作用してヨーク金具が傾斜することが有効に防止されるため、上下の導体が一つの共通の垂直線の付近又はその共通の垂直線上に保持され、垂直２導体用Ｖ吊懸垂装置の利点が維持される。
【００４５】
請求項５の発明によれば、（ｂ”）上側の懸垂クランプの取付点及び下側の懸垂クランプの取付点を、それぞれ、両がいし連の長手方向中心線の交点を通る垂直線から前記導体の水平角に基づく振れ方向側に所定距離ずらした位置を通る垂直線上に設けたので、上下の懸垂クランプの取付点が共通の垂直線上に存在し、かつ、導体の水平角に応じて生じる導体の振れ角に基づく導体荷重の水平分力によりヨークに加わる回転モーメントが打ち消される。従って、水平角に基づく懸垂クランプの振れ角によってヨーク金具に回転モーメントが作用してヨーク金具が傾斜することが確実に防止されるため、上下の導体が一つの共通の垂直線上に保持され、垂直２導体用Ｖ吊懸垂装置の利点がより良く維持される。
【００４６】
請求項６の発明によれば、請求項５の垂直２導体用Ｖ吊懸垂装置において、
（ｃ）主ヨーク金具の連結金具との枢着点を通る垂直線から上下の懸垂クランプの取付点を通る垂直線までの距離Ｌ3 は、主ヨーク金具の連結金具との枢着点から上側の懸垂クランプの取付点までの垂直面に対する投影距離をＬ1 、上側の懸垂クランプの取付点から下側の懸垂クランプの取付点までの距離をＬ2 、上側の懸垂クランプに掌握される導体の水平荷重及び垂直荷重をＨ1 ，Ｖ1 、下側の懸垂クランプに掌握される導体の水平荷重及び垂直荷重をＨ2 ，Ｖ2 とすると、式
Ｌ3 ＝［（Ｈ1 ×Ｌ1 ）＋｛Ｈ2 ×（Ｌ1 ＋Ｌ2 ）｝］／（Ｖ1 ＋Ｖ2 ）
により設定されているので、既知の各項の具体値を用いて、容易に懸垂クランプの取付位置を主ヨーク金具に決定することができ、水平角の影響を受けずに一対のがいし連の荷重分担が均等な、安定性の高い垂直２導体用Ｖ吊懸垂装置を提供することができる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態に係る垂直２導体用Ｖ吊懸垂装置であって、導体の張設方向から見た送電線鉄塔のアーム部分の正面図である。
【図２】本発明の第２の実施の形態に係る垂直２導体用Ｖ吊懸垂装置の正面図である。
【図３】本発明の第３の実施の形態に係る傾斜型垂直２導体用Ｖ吊懸垂装置であって、導体の張設方向から見た送電線鉄塔のアーム部分の正面図である。
【図４】本発明の第４の実施の形態に係る垂直２導体用Ｖ吊懸垂装置の正面図である。
【図５】ヨーク金具の取付位置及び導体の取付孔の位置関係等を説明するための説明図である。
【図６】垂直２導体のＶ吊懸垂状態を説明するための説明図である。
【符号の説明】
Ｔ送電線鉄塔
Ａアーム
１がいし装置
１ａ，１ｂがいし連
Ｙ1 ，Ｙ2 ヨーク金具
Ｙ２１補助ヨーク金具
Ｙ２２連結金具
Ｙ２３主ヨーク金具
Ｃ1 ，Ｃ2 懸垂クランプ[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a V-suspending device for vertical two conductors.
[0002]
[Prior art]
  Generally, a two-conductor V-suspended suspension device is formed in a V shape by attaching a yoke fitting to the lower ends of a pair of insulators, and is constructed by pivotally attaching two suspension clamps that hold the conductor to the yoke fitting. Has been.
[0003]
[Problems to be solved by the invention]
  However, since the conventional two-conductor V-suspended suspension device has two suspension clamps attached to the yoke fitting so as to be horizontally aligned, the two conductors are arranged in a horizontal direction away from the tower. There was a drawback that the lower compensation cost was increased.
[0004]
  In order to eliminate such drawbacks, another single-conductor suspension clamp is attached to the lower portion of the single-conductor suspension clamp, and the two conductors are arranged vertically to form two vertical conductors. However, in this case, the coupling structure of the clamp becomes complicated and the cost becomes high, which is not practical.
[0005]
  By the way, when the two vertical conductors are connected to each other with a spacer, the characteristic of damping the mutual conductors becomes good due to the bate damper effect of the lower conductors on the upper conductors. It is said that there is.
[0006]
  Therefore, the present invention has been made to solve the above-mentioned drawbacks while taking advantage of the above-mentioned features when the two conductors are vertical two conductors. The first object of the present invention is to provide a yoke fitting with a simple configuration. It is to be able to arrange two conductors vertically. In the case of two vertical conductors, when the conductor stretched on the steel tower has a horizontal angle, an undesired moment acts due to the horizontal component of the conductor load applied to the yoke fitting. Therefore, it is desirable that the configuration of the yoke fitting and the attachment position of the suspension clamp are such that no rotational moment is generated when a conductor having a horizontal angle is suspended from the yoke fitting. Accordingly, a second object of the present invention is to provide a V-suspending device for vertical two conductors that can be applied when it has a horizontal angle.
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, the present invention provides: (A) A yoke fitting is pivotally attached to the lower ends of a pair of insulators whose upper ends are supported at positions apart from the tower arm; Do not swing the suspension clampUsed when the conductor stretched on the steel tower does not have a horizontal angle.In the vertical two-conductor V-suspended suspension apparatus, (a1) a yoke fitting is connected to an upper side portion whose both ends are pivotally attached to the respective lower end portions of the pair of insulator series, andBetween the pivot point of the pair of insulatorsA lower end portion provided at a position substantially spaced downward from the center, and a connecting portion that connects the upper side portion and the lower end portion and forms a recess that opens to the tower side for accommodating the upper suspension clamp. (B1) The attachment point of the upper suspension clamp on the upper side of the yoke bracketas well asThe attachment point of the lower suspension clamp is provided at the lower end portion of the yoke fitting on the vertical line passing through the intersection of the longitudinal center lines of the pair of cords (Claim 1).
  With the above configuration, the attachment points of the upper and lower suspension clamps are on a common vertical line, and the center of gravity of the two conductors gripped by the upper and lower suspension clamps is on the vertical line passing through the intersection of the longitudinal longitudinal center lines It will be located below the intersection.
[0008]
  Further, according to the present invention, (A ′) a yoke metal fitting is pivotally attached to the lower ends of a pair of insulators whose upper ends are supported at a position apart from the tower arm, and a suspension clamp is swung at two upper and lower positions of the yoke metal. In a vertical two-conductor V suspended suspension device that is freely attached and is used when a conductor stretched on the steel tower has a horizontal angle, (a1 ′) a yoke fitting and both sides of each of the pair of insulator series The upper side that is pivotally attached to the lower end of theBetween the pivot point of the pair of insulatorsA lower end portion provided at a position approximately away from the center and a connecting portion that connects the upper side portion and the lower end portion and forms a concave portion that opens laterally to accommodate the upper suspension clamp. (B1 ') The attachment point of the upper suspension clamp on the upper side of the yoke fittingas well asAt the lower end of the yoke fitting, attach the lower suspension clamp to the run-out direction based on the horizontal angle of the conductor from the vertical line passing through the intersection of the longitudinal center lines of the two cords.Position shifted by a predetermined distance(Claim 2).
  With the above configuration, the rotational moment applied to the yoke is canceled or reduced by the horizontal component of the conductor load based on the deflection angle of the conductor generated according to the horizontal angle of the conductor.
[0009]
  Further, according to the present invention, (A) a yoke fitting is pivotally attached to the lower ends of a pair of insulators whose upper ends are supported at positions away from the tower arm, and suspension clamps are swingable at two upper and lower positions of the yoke fitting. Attached toUsed when the conductor stretched on the steel tower does not have a horizontal angle.In the vertical two-conductor V-suspended suspension apparatus, (a2) the yoke fitting is connected to an auxiliary yoke fitting pivotally attached to the respective lower ends of the pair of insulators, and a lower portion of the auxiliary yoke fitting. The upper end is pivotally attached to the lower end of the connecting bracket, and is composed of a connecting bracket pivotally attached to the upper end in the center and a main yoke bracket pivotally attached to the lower end of the connecting bracket. And a lower end portion provided at a position below the upper side portion, and the upper side portion and the lower end portion are connected to each other, and a concave portion that opens to the side for accommodating the upper suspension clamp is formed. And (b2) the attachment point of the upper suspension clamp on the upper side of the main yoke fitting.as well asThe attachment point of the lower suspension clamp is provided at the lower end portion of the main yoke fitting on a vertical line passing through the intersection of the longitudinal center lines of the two cords (Claim 3).
  With the above configuration, the attachment points of the upper and lower suspension clamps are on a common vertical line, and the center of gravity of the two conductors gripped by the upper and lower suspension clamps is on the vertical line passing through the intersection of the longitudinal longitudinal center lines It will be located below the intersection.
[0010]
  And, according to the present invention, (A ′) a yoke metal fitting is pivotally attached to the lower ends of a pair of insulators whose upper ends are supported at a position apart from the tower arm, and a suspension clamp is swung at two upper and lower positions of the yoke metal. In a vertical two-conductor V suspended suspension apparatus that is freely attached and used when a conductor stretched on the steel tower has a horizontal angle, (a2) the yoke fitting is connected to each of the pair of insulators at both ends. An auxiliary yoke fitting pivotally attached to the lower end of the auxiliary yoke, a coupling fitting having an upper end pivotally attached to the center of the lower side of the auxiliary yoke fitting, and a main yoke fitting pivotally attached to the lower end of the coupling fitting And (a1 ″) an upper side portion pivotally attached to the lower end of the coupling metal, a lower end portion provided at a position below the upper side portion, the upper side portion and the lower end Connecting the upper and lower suspension clans Constructed integrally includes a connecting portion to form a recess that opens to the side for accommodating, (b2 ') attachment points of the suspension clamp the upper to the upper portion of the main yoke memberas well asThe attachment point of the lower suspension clamp at the lower end portion of the main yoke fitting is set to a swing direction based on a horizontal angle of the conductor from a vertical line passing through an intersection of the longitudinal center lines of the two cords.Position shifted by a predetermined distance(Claim 4).
  With the above configuration, the rotational moment applied to the yoke is canceled or reduced by the horizontal component of the conductor load based on the deflection angle of the conductor generated according to the horizontal angle of the conductor.
[0011]
  In the invention of claim 4, (b2 ″) the attachment point of the upper suspension clamp and the attachment point of the lower suspension clamp are respectively set from the vertical line passing through the intersection of the longitudinal center lines of the two pairs of horizontal conductors. In the deflection direction based on the cornerPosition shifted by a predetermined distanceIt is desirable to provide it on a vertical line passing through the device (claim 5).
  With the above configuration, the attachment points of the upper and lower suspension clamps exist on a common vertical line, and the rotational moment applied to the yoke is canceled out by the horizontal component of the conductor load based on the deflection angle of the conductor generated according to the horizontal angle of the conductor. It is.
[0012]
  According to the present invention, in the vertical two-conductor V-suspended suspension apparatus according to claim 5, (c) a vertical line passing through a mounting point of the upper and lower suspension clamps from a vertical line passing through a pivot point with the connecting fitting of the main yoke metal fitting. Distance L3 is the projected distance from the pivot point of the main yoke bracket to the mounting point of the upper suspension clamp to the mounting point of the upper suspension clamp L1, and the mounting point of the upper suspension clamp from the mounting point of the upper suspension clamp If the distance to the point is L2, the horizontal and vertical loads of the conductor held by the upper suspension clamp are H1 and V1, and the horizontal and vertical loads of the conductor held by the lower suspension clamp are H2 and V2, formula
  L3 = [(H1 * L1) + {H2 * (L1 + L2)}] / (V1 + V2)
(Claim 6).
[0013]
DETAILED DESCRIPTION OF THE INVENTION
  FIG. 1 is a vertical two-conductor V suspended suspension apparatus according to a first embodiment of the present invention, and is a front view of an arm A portion of a transmission line tower T as viewed from the direction in which a conductor is stretched. A vertical two-conductor V-suspending device (hereinafter sometimes simply referred to as a “V-suspending device”) in the case where the outgoing direction is a straight line, that is, when the horizontal angle is 0 is shown.
[0014]
  In the figure, reference numeral 1 denotes a vertical two-conductor V-suspended suspension device. Like a well-known V-suspended suspension device, a pair of insulators 1a and 1b, each of which comprises a suspension arm equipped with an arc horn, is suspended from an arm A. In addition, a single yoke fitting Y1 is pivotally attached to the lower end portion of the insulator series and connected in a V shape.
[0015]
  The yoke fitting Y1 has an upper side Y1a whose both ends are connected to each other and the lower ends of the reams 1a and 1b are rotatably connected to each other.Between the pivot points of the insulator series 1a and 1bA lower end Y1b provided substantially below the center, and a connecting portion Y1c bent or curved to connect the upper side Y1a and the lower end Y1b to form a recess Y1d opening on the tower side. As an example, it has a substantially F shape. The recess Y1d is sized so that a suspension clamp, which will be described later, is suspended so as to be swingable, and the upper conductor D1 can be taken in and out. In addition, the shape of the “F shape” includes a crescent shape or a semi-ring shape.
[0016]
  This yoke fitting Y1 is connected to the insulator device 1 so that the opening direction of the recess Y1d faces the transmission line tower T side. For this reason, the insulation space | interval of the yoke metal fitting Y1 and the transmission line tower T can be taken large.
[0017]
  Of the two conductors D1 and D2, the upper conductor D1 is attached to the suspension clamp C1 attached to the lower part of the upper side Y1a of the yoke fitting Y1, and the lower conductor D2 is the lower end of the yoke fitting Y1. It is gripped by a suspension clamp C2 attached to the portion Y1b so as to be suspended downward from its lower end. And the yoke fitting used when there is no horizontal angleY 1The mounting holes b1 and b2 of the suspension clamps C1 and C2 provided in FIG.
[0018]
  That is, the mounting holes b1 and b2 are located on the vertical line a3 passing through the intersection O1 of the longitudinal center lines a1 and a2 of the pair of insulator series 1a and 1b. The vertical line a3 has a relationship of equally dividing the angle formed by the center lines a1 and a2 (see θ1 = θ2 in FIG. 1). The center of gravity O2 of the conductors D1 and D2 held by the suspension clamps C1 and C2 is located below the intersection O1 on the vertical line a3.
[0019]
  When the equal load support point (the center of gravity O2 of the conductors D1 and D2) of the yoke fitting Y1 is located on the vertical line a3, the shared load of the pair of insulators 1a and 1b can be made equal. That is, the vertical line a3 corresponds to a load line shown in FIG. 5 described later. Therefore, the equal load supporting point (the center of gravity O2 of the conductors D1 and D2) of the yoke fitting Y1 is on the vertical line a3 and the intersection O1. As long as it is provided on the lower side, it is possible to balance the load shared by the insulators 1a and 1b, and the yoke fitting Y1 maintains high stability and is held by the upper and lower suspension clamps C1 and C2. It means that the two conductors D1 and D2 are held on the vertical line a3.
[0020]
  FIG. 2 shows a vertical two-conductor V suspended suspension apparatus according to a second embodiment of the present invention. This is also used when there is no horizontal angle, but the difference from the above example is that the yoke fitting Y2 has an auxiliary yoke fitting Y21 pivotally attached to the lower end of the insulator device 1 at the upper end of both ends, That is, the auxiliary yoke fitting is composed of three members: a connecting fitting Y22 whose upper end is pivotally attached to the lower center of the auxiliary yoke fitting, and a main yoke fitting Y23 pivotally attached to the lower end of the connecting fitting. The main yoke fitting Y23 has a shape similar to that of the yoke fitting Y1 in the first embodiment, and has an upper side portion Y23a, a lower end portion Y23b and a connecting portion Y23c, and a recess Y23d that opens to the tower side. Is formed. Mounting holes b1 and b2 for suspension clamps C1 and C2 are provided in the lower portion and the lower end portion Y23b of the upper side portion Y23a.
[0021]
  The auxiliary yoke fitting Y21 serves to connect the lower ends of the pair of insulators 1a and 1b. The auxiliary yoke fitting Y21 has a mounting hole 2a on the upper side of the connecting fitting Y22 on the line through which the vertical line a3 passes. The lower mounting hole 2b and the mounting holes b1 and b2 of the suspension clamps C1 and C2 of the main yoke fitting Y23 are located respectively.
[0022]
  When the main yoke fitting Y23 to which the suspension clamps C1 and C2 are attached is sequentially pivoted to the connecting fitting Y22 and the auxiliary yoke fitting Y21 as in the present embodiment, when the cross wind acts on the conductors D1 and D2. The influence on the insulator series 1a, 1b can be mitigated.
[0023]
  FIG. 3 shows a state in which the vertical two-conductor V-suspending device having the single yoke fitting Y1 shown in FIG. 1 is applied to an inclined V-suspending device used when the conductors D1 and D2 have a horizontal angle. ing.
[0024]
  In this inclined V hanging device, the insulator device 1 'is connected to the lower portion of the auxiliary arm A' so that the load sharing of the pair of insulator trains 1a, 1b is the same in a normal state. ing. Therefore, when the angle formed by the center lines a1 and a2 is divided by the vertical line a3 passing through the intersection O1 of the centerlines a1 and a2, the angles .theta.1 and .theta. By descending by the length of ′, the angle θ1 on the side of the insulator series 1a becomes larger than the angle θ2 of the insulator series 1b (see θ1> θ2 in FIG. 3).
[0025]
  Then, due to the horizontal angle of the conductor, a pulling force in the inner direction of the horizontal angle (the direction away from the steel tower T in the conductor of FIG. 3) acts on each conductor, so that the suspension clamps C1, C2 and the conductors D1, Similarly, D2 swings to the right and tilts (the tilt angle in this case is referred to as the swing angle), and in this tilted state, the shared load of each insulator series 1a and 1b and the conductor load are balanced and stopped. Here, the positions of the mounting holes b1 and b2 of the suspension clamps C1 and C2 are located on the right side of the vertical line a3 passing through the intersection O1 of the longitudinal center lines a1 and a2 of the pair of insulators 1a and 1b (the direction of deflection of the conductor). Is located on the side).
[0026]
  FIG. 4 shows a vertical two-conductor V-suspending device composed of the auxiliary yoke fitting Y21, the connecting fitting Y22, and the main yoke fitting Y23 described with reference to FIG. The example used for the apparatus is shown.
  Also in this example, due to the horizontal angle of the conductors D1 and D2, a tensile force in the inner direction of the horizontal angle (the direction away from the steel tower in the conductor of FIG. 4) acts on each conductor. C2 and conductors D1 and D2 are also swung to the right and inclined, and the mounting holes b1 and b2 of the suspension clamps C1 and C2 are located on the right side of the vertical line a3.
[0027]
  The yoke fitting Y2, the auxiliary yoke fitting Y21 and the main yoke fitting Y23 can be dedicated for both sides of the steel tower, but the yoke fitting Y2, the auxiliary yoke fitting Y21 and the main yoke fitting Y23 have mounting holes for both sides. Can also be used together. In this case, there is a feature that inventory management becomes easy.
[0028]
  FIG. 5 shows the center of gravity of the conductors D1 and D2 held by the upper and lower suspension clamps C1 and C2 when the vertical two-conductor V suspension suspension of FIG. 2 is used in the V suspension of FIG. , C2 moves in a direction that cancels the moment applied to the yoke fitting due to the horizontal component force generated by the deflection angle of C2, and the mounting holes b1, b2 of the suspension clamps C1, C2 exist on one common vertical line. A method of determining the installation positions of the holes b1 and b2 in consideration of the horizontal angle and the swing angle of the suspension clamps C1 and C2 will be described.
  Y23 'is a main yoke fitting provided with mounting holes b1 and b2 of the main yoke fitting Y23 shown in FIGS. 2 and 4 at appropriate positions corresponding to the horizontal angle. A chain line a0 is a load line (hereinafter, the chain line a0 is referred to as a load line) for supporting the main yoke fitting Y23 in an equal load. The intersection O1 of the center lines a1 and a2 (see FIG. 4) and the connection fitting Y22. And an angle β with respect to the vertical line a3 passing through the intersection O1 or the vertical line a5 passing through the mounting hole 2b.
[0029]
  This angle β is caused by the horizontal angle of the conductors D1 and D2. Therefore, in the case of FIG. 2, the load line a0 is equal to the vertical line passing through the vertical line a3 and the mounting hole 2b as described above. Here, the load line a0 has an angle β corresponding to the horizontal angle.
[0030]
  Now, the suspension clamps C1 and C2 are respectively attached to the respective mounting holes b1 and b2 in FIG. Where V1 and V2 and deflection angles (angles with respect to the vertical direction) are η1 and η2, and when the horizontal loads H1 and H2 are equal in the upper and lower conductors D1 and D2, β is obtained by the following equation (1): be able to.
  Formula (1)
    β = tan −1 ((H 1 + H 2) / (V 1 + V 2)) = (η 1 + η 2) / 2
    (However, = on the right side is grinning. (See (1) in FIG. 5.)
[0031]
  When the horizontal loads H1 and H2 of the upper and lower conductors D1 and D2 are different, β can be obtained by the following equation (2).
  Formula (2)
    β = tan −1 ((H 1 + H 2) / (V 1 + V 2))
  (See (2) in FIG. 5).
[0032]
  As a case where the above-described horizontal loads H1 and H2 are the same or different, there is a case where the ground height of the existing transmission line needs to be locally increased. This will be explained with reference to FIG. 6. In the transmission line tower T1, each conductor D1, D2 is suspended by one arm for each arm and converges to two vertical conductors in the next transmission line tower T2. However, the conductor D2 is longer and the horizontal loads H1 and H2 are different.
[0033]
  On the other hand, as shown in the transmission line tower T3, the transmission line tower T2 receives the conductors D1 and D2 suspended by the two vertical conductors, and further receives a transmission line tower (not shown) suspended by the two vertical conductors. When delivered, the conductors D1 and D2 have the same length, and the horizontal loads H1 and H2 are the same.
[0034]
  In any case, if the center of gravity of the conductors D1 and D2 held by the suspension clamps C1 and C2 is O2, the connection point (position 2b) between the lower ends of the main yoke fitting Y23 'and the connection fitting Y22 is O1. Is on a straight line connecting O2 and O2, that is, on the load line a0 maintaining the above-mentioned angle β. In the case of the yoke fitting Y1 in FIG. 3, O1 in FIG. 3 is located on the load line a0 in FIG.
[0035]
  The mounting position 2b of the main yoke fitting Y23 'and the gravity center position O2 of the conductors D1 and D2 have the above-mentioned relationship. In other words, the rotational moment of the main yoke fitting Y23' around the mounting position 2b is zero. It is shown that. Therefore, when mounting holes b1 and b2 are provided at two places above and below O2 on the vertical line passing through an arbitrarily defined position O2 on the load line a0, they are held by suspension clamps C1 and C2 attached to each mounting hole. The two locations where the center of gravity of the conductor is the O2 position are positions where the mounting holes b1 and b2 should be provided. Thereby, the shared load of a pair of insulator series 1a, 1b in a normal state can be kept equal to an intended design, and it can be set as a versatile yoke metal fitting by maintaining such a relationship.
[0036]
  Next, a method for obtaining the center of gravity position O2 on the load line a0 and the positions of the mounting holes b1 and b2 of the suspension clamps C1 and C2 when the mounting position 2b of the main yoke fitting Y23 'is used as a reference will be described.
[0037]
  As shown in FIG. 5, the intersection point where the load line a0 passing through the mounting hole 2b of the main yoke fitting Y23 'and the vertical line a4 passing through the mounting holes b1 and b2 of the suspension clamps C1 and C2 is defined as O2, and the mounting is performed from the mounting hole 2b. When the projection distance to the vertical plane up to the hole b1 is L1, and the distance from the mounting hole b1 to the mounting hole b2 is L2, the distance L3 from the vertical line a5 passing through the mounting position 2b to the vertical line a4 is given by 3) (see (3) in FIG. 5).
  Formula (3)
    L3 = [(H1 * L1) + {H2 * (L1 + L2)}] / (V1 + V2)
[0038]
  Expression (3) also indicates that the rotational moment in the normal state of the main yoke fitting Y23 'centered on the mounting position 2b is zero.
[0039]
  In the above equations (1)-(3), the deflection angles η1, η2 can be obtained by calculation based on the loads and horizontal angles of the conductors D1, D2, and accordingly, the horizontal loads H1, H2, the vertical loads V1, V2 Can also be obtained by calculation. Therefore, by substituting the real values of η1, η2, H1, H2, V1, and V2 into the right side of equations (1) and (2), a specific value of the angle β of the load line a0 with respect to the vertical line a5 can be obtained. it can. L1 and L2 can be arbitrarily set according to the required distance between the upper and lower conductors. Therefore, L3 can be determined by substituting a real value for each term on the right side of equation (3).
[0040]
  As described above, the vertical two-conductor V-suspending suspension apparatus according to the present invention includes both the embodiment using the single yoke metal fitting Y1 and the embodiment using the composite yoke metal fitting Y2, and the suspension clamps C1 and C2. By appropriately setting the positions of the mounting holes b1 and b2, even when the conductor has a horizontal angle, the shared load of the pair of insulators 1a and 1b in the normal state can be kept even, and the upper and lower conductors can be Can be suspended on a common vertical line.
[0041]
【The invention's effect】
  According to the first aspect of the present invention, (A) a yoke metal fitting is pivotally attached to the lower ends of a pair of insulators whose upper ends are supported at positions apart from the tower arm, and suspension clamps are provided at two upper and lower positions of the yoke metal. It ’s rockable.Used when the conductor stretched on the steel tower does not have a horizontal angle.In the vertical two-conductor V-suspended suspension apparatus, (a1) a yoke fitting is connected to an upper side portion whose both ends are pivotally attached to the respective lower end portions of the pair of insulator series, andBetween pivot points with a pair of insulatorsA lower end portion provided at a position away from substantially the center of the lower end portion, and a connecting portion that connects the upper side portion and the lower end portion and forms a recess opening on the tower side for accommodating the upper suspension clamp. (B1) The attachment point of the upper suspension clamp on the upper side of the yoke fittingas well asSince the attachment point of the lower suspension clamp is provided at the lower end portion of the yoke fitting on the vertical line passing through the intersection of the longitudinal center lines of the two cords, the following effects can be obtained. That is,
  First, a V-suspending device for two conductors can be provided with a simple configuration. Second, since the attachment points of the upper and lower suspension clamps exist on a common vertical line, it is possible to reduce the underline compensation cost. Third, since the center of gravity of the two conductors held by the upper and lower suspension clamps is located below the intersection point on the vertical line passing through the intersection point of the longitudinal center lines of the chain, the highly stable vertical two conductors V suspension suspension can be provided. Fourth, since the concave portion of the yoke fitting is opened toward the transmission line tower side, the interval between the yoke fitting and the transmission line tower is increased, which is advantageous in ground insulation.
[0042]
  According to the second aspect of the present invention, (A ′) the yoke metal fittings are pivotally attached to the lower ends of the pair of insulators whose upper ends are supported at positions apart from the tower arm, and the suspension clamps are provided at two upper and lower positions of the yoke metal fittings. In the vertical two-conductor V-suspended suspension device used when the conductor stretched on the steel tower has a horizontal angle, (a1 ′) the yoke metal fittings and the pair of insulators on both sides. An upper side pivotally attached to each lower end of the ream, and an upper side of the upper sideBetween pivot points with a pair of insulatorsA lower end portion provided at a position away from substantially the center of the lower end portion, and a connecting portion that connects the upper side portion and the lower end portion, and forms a concave portion that opens laterally to accommodate the upper suspension clamp. (B1 ') Attachment point of the upper suspension clamp on the upper side of the yoke bracketas well asAt the lower end of the yoke fitting, attach the lower suspension clamp to the run-out direction based on the horizontal angle of the conductor from the vertical line passing through the intersection of the longitudinal center lines of the two cords.Position shifted by a predetermined distanceTherefore, the rotational moment applied to the yoke is canceled or reduced by the horizontal component of the conductor load based on the deflection angle of the conductor generated according to the horizontal angle of the conductor. Therefore, the swinging angle of the suspension clamp based on the horizontal angle effectively prevents the yoke fitting from tilting due to the rotational moment acting on the yoke fitting, so that the upper and lower conductors are held on or near one common vertical line. Thus, the advantage of the vertical two-conductor V suspension system is maintained.
[0043]
  According to invention of Claim 3, (A) A yoke metal fitting is pivotally attached to the lower end part of a pair of insulator series in which the upper end was supported in the position which the tower arm left | separated, and a suspension clamp is carried out in two upper and lower sides of the yoke metal fitting. It ’s rockable.Used when the conductor stretched on the steel tower does not have a horizontal angle.In the vertical two-conductor V-suspended suspension apparatus, (a2) the yoke fitting is connected to an auxiliary yoke fitting pivotally attached to the respective lower ends of the pair of insulators, and a lower portion of the auxiliary yoke fitting. The upper end is pivotally attached to the lower end of the connecting bracket, and is composed of a connecting bracket pivotally attached to the upper end in the center and a main yoke bracket pivotally attached to the lower end of the connecting bracket. And a lower end portion provided at a position below the upper side portion, and the upper side portion and the lower end portion are connected to each other, and a concave portion that opens to the side for accommodating the upper suspension clamp is formed. And (b2) the attachment point of the upper suspension clamp on the upper side of the main yoke fitting.as well asSince the attachment point of the lower suspension clamp is provided at the lower end portion of the main yoke fitting on the vertical line passing through the intersection of the longitudinal center lines of the two cords, the following effects can be obtained. That is,
  First, a V-suspending device for two conductors can be provided with a simple configuration. Second, since the attachment points of the upper and lower suspension clamps exist on a common vertical line, it is possible to reduce the underline compensation cost. Third, since the center of gravity of the two conductors held by the upper and lower suspension clamps is located below the intersection point on the vertical line passing through the intersection point of the longitudinal center lines of the chain, the highly stable vertical two conductors V suspension suspension can be provided.
[0044]
  According to invention of Claim 4, (A ') A yoke metal fitting is pivotally attached to the lower end part of a pair of insulator series with which the upper end was supported in the position which the steel tower arm left | separated, and a suspension clamp is carried out at two upper and lower sides of the yoke metal fitting. In the vertical two-conductor V-suspended suspension device used when the conductor stretched on the steel tower has a horizontal angle, (a2) the yoke fitting is connected to the pair of insulators at both ends. Auxiliary yoke fittings pivotally attached to the respective lower end portions of the series, a connecting fitting whose upper end is pivotally attached to the center of the lower side of the auxiliary yoke fitting, and a main yoke fitting pivotally attached to the lower end of the connecting fitting And (a1 ″) an upper side portion pivotally attached to a lower end of the coupling metal, a lower end portion provided at a position spaced below the upper side portion, and the upper side portion And the lower end of the upper suspension And a connecting portion to form a recess that opens to the side for accommodating the lamp constructed integrally provided with, (b2 ') attachment points of the suspension clamp the upper to the upper portion of the main yoke memberas well asThe attachment point of the lower suspension clamp at the lower end portion of the main yoke fitting is set to a swing direction based on a horizontal angle of the conductor from a vertical line passing through an intersection of the longitudinal center lines of the two cords.Position shifted by a predetermined distanceTherefore, the rotational moment applied to the yoke is canceled or reduced by the horizontal component of the conductor load based on the deflection angle of the conductor generated according to the horizontal angle of the conductor. Therefore, the swinging angle of the suspension clamp based on the horizontal angle effectively prevents the yoke fitting from tilting due to the rotational moment acting on the yoke fitting, so that the upper and lower conductors are in the vicinity of one common vertical line or their common The advantage of the vertical two-conductor V suspension suspension is maintained.
[0045]
  According to the fifth aspect of the present invention, (b ″) the attachment point of the upper suspension clamp and the attachment point of the lower suspension clamp are each set from the vertical line passing through the intersection of the longitudinal center lines of the two cords to the conductor. On the shake direction side based on the horizontal angle ofPosition shifted by a predetermined distanceThe mounting points of the upper and lower suspension clamps are on a common vertical line, and the yoke is applied by the horizontal component of the conductor load based on the deflection angle of the conductor generated according to the horizontal angle of the conductor. The rotational moment applied to is canceled. Therefore, the swinging angle of the suspension clamp based on the horizontal angle reliably prevents the yoke bracket from being tilted due to the rotational moment acting on the yoke bracket, so that the upper and lower conductors are held on one common vertical line, The advantages of the two-conductor V suspended suspension are better maintained.
[0046]
  According to the invention of claim 6, in the vertical two-conductor V suspended suspension apparatus of claim 5,
(C) The distance L3 from the vertical line passing through the pivot point of the main yoke bracket to the vertical line passing through the attachment points of the upper and lower suspension clamps is The projected distance to the vertical plane to the suspension clamp attachment point is L1, the distance from the upper suspension clamp attachment point to the lower suspension clamp attachment point is L2, the horizontal load of the conductor held by the upper suspension clamp, and If the vertical load is H1 and V1, and the horizontal load and vertical load of the conductor held by the lower suspension clamp are H2 and V2, the formula
  L3 = [(H1 * L1) + {H2 * (L1 + L2)}] / (V1 + V2)
Therefore, using the specific values of each known item, the mounting position of the suspension clamp can be easily determined on the main yoke bracket, and the load of a pair of insulators is not affected by the horizontal angle. It is possible to provide a highly stable V-suspending device for vertical two conductors with uniform sharing.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view of an arm portion of a transmission line tower as viewed from the direction in which a conductor is stretched, which is a vertical two-conductor V suspended suspension apparatus according to a first embodiment of the present invention.
FIG. 2 is a front view of a vertical two-conductor V suspended suspension apparatus according to a second embodiment of the present invention.
FIG. 3 is a front view of an arm portion of a transmission line tower as seen from the direction in which a conductor is stretched, which is an inclined vertical two-conductor V suspended suspension apparatus according to a third embodiment of the present invention.
FIG. 4 is a front view of a vertical two-conductor V suspended suspension apparatus according to a fourth embodiment of the present invention.
FIG. 5 is an explanatory diagram for explaining a positional relationship between a mounting position of a yoke fitting and a mounting hole of a conductor.
FIG. 6 is an explanatory diagram for explaining a V suspended state of two vertical conductors.
[Explanation of symbols]
    T Transmission line tower
    A Arm
    1 insulator device
    1a, 1b insulator series
    Y1, Y2 Yoke bracket
    Y21 Auxiliary yoke bracket
    Y22 connecting bracket
    Y23 Main yoke bracket
    C1, C2 suspension clamp

Claims

Upper end pivotally mounted to the yoke member to the lower end portion of the supported pair of insulators with the remote location of the tower arm, Ri Na attach the suspension clamp to swing in two, upper and lower portions of the yoke member, said tower in V hanging suspension device for vertical second conductor that is used when no conductor is horizontal angle to be stretched,
The yoke fitting is spaced downward from substantially the center between the upper side portion whose both ends are pivotally attached to the respective lower end portions of the pair of insulator series, and the pivot point of the pair of insulator series on the upper side portion. A lower end portion provided at a position, and a connecting portion that connects the upper side portion and the lower end portion, and that forms a recess opening on the steel tower side to accommodate the upper suspension clamp,
The attachment point of the upper suspension clamp on the upper side of the yoke bracket and the attachment point of the lower suspension clamp on the lower end portion of the yoke bracket, respectively, on a vertical line passing through the intersection of the longitudinal center lines of the pair Established in
A vertical two-conductor V-hanging suspension device.

A yoke bracket is pivotally attached to the lower ends of a pair of insulators whose upper ends are supported at positions away from the tower arm, and suspension clamps are swingably attached to the upper and lower portions of the yoke bracket. In a V-suspending device for vertical two conductors used when a conductor to be installed has a horizontal angle,
The yoke fitting is separated downward from a substantially central portion between an upper side part pivoted on both lower ends of the pair of insulator series and a pivot point between the pair of insulator series on the upper side part. A lower end portion provided at a position, and a connecting portion that connects the upper side portion and the lower end portion, and forms a concave portion that opens to the side to accommodate the upper suspension clamp, and is integrally configured;
A vertical line that passes through the intersection of the longitudinal center lines of the above-mentioned two cords, the attachment point of the upper suspension clamp on the upper side of the yoke fitting and the attachment point of the lower suspension clamp on the lower end of the yoke fitting, respectively. it provided a position shifted a predetermined distance in the vibration direction based on the horizontal angle of the conductor from,
A vertical two-conductor V-hanging suspension device.

Upper end pivotally mounted to the yoke member to the lower end portion of the supported pair of insulators with the remote location of the tower arm, Ri Na attach the suspension clamp to swing in two, upper and lower portions of the yoke member, said tower in V hanging suspension device for vertical second conductor that is used when no conductor is horizontal angle to be stretched,
An auxiliary yoke fitting whose both ends are pivotally attached to the respective lower ends of the pair of insulators, a connecting fitting whose upper end is pivotally attached to the center of the lower side of the auxiliary yoke fitting, and its connection The main yoke bracket is pivotally attached to the lower end of the bracket.
The main yoke fitting is connected to the upper side portion pivotally attached to the lower end of the connection fitting, the lower end portion provided at a position separated below the upper side portion, the upper side portion and the lower end portion, and of a connecting portion to form a recess that opens to the side for receiving the suspension clamp constructed integrally provided with, of the upper suspension clamp attachment points and the main yoke member to the upper portion of the main yoke member The attachment point of the lower suspension clamp is provided at the lower end portion, respectively, on a vertical line passing through the intersection of the longitudinal center lines of the above-mentioned double comb series,
A vertical two-conductor V-hanging suspension device.

A yoke bracket is pivotally attached to the lower ends of a pair of insulators whose upper ends are supported at positions away from the tower arm, and suspension clamps are swingably attached to the upper and lower portions of the yoke bracket. In a V-suspending device for vertical two conductors used when a conductor to be installed has a horizontal angle,
An auxiliary yoke fitting whose both ends are pivotally attached to the respective lower ends of the pair of insulators, a connecting fitting whose upper end is pivotally attached to the center of the lower side of the auxiliary yoke fitting, and its connection The main yoke bracket is pivotally attached to the lower end of the bracket.
The main yoke fitting is connected to the upper side portion pivotally attached to the lower end of the connection fitting, the lower end portion provided at a position separated below the upper side portion, the upper side portion and the lower end portion, and of a connecting portion to form a recess that opens to the side for receiving the suspension clamp constructed integrally provided with, of the upper suspension clamp attachment points and the main yoke member to the upper portion of the main yoke member the attachment points of the lower suspension clamp to the lower end, respectively, provided on the both insulators position shifted a predetermined distance from the vertical line to the shake direction based on the horizontal angle of the conductor through the intersection of the longitudinal center line of the communication Was it,
A vertical two-conductor V-hanging suspension device.

5. The vertical two-conductor V-suspended suspension apparatus according to claim 4, wherein the upper suspension clamp attachment point and the lower suspension clamp attachment point are respectively perpendicular lines passing through the intersections of the longitudinal center lines of the pair of insulators. V hanging suspension device for vertical second conductor, characterized in that provided on the vertical line passing through the position shifted a predetermined distance in the vibration direction based on the horizontal angle of the conductor from.

6. The vertical two-conductor V suspension suspension apparatus according to claim 5, wherein the projection distance from the pivot point of the main yoke fitting to the connection fitting to the attachment point of the upper suspension clamp is L1, and the attachment point of the upper suspension clamp. L2 is the distance from the mounting point to the lower suspension clamp, H1 and V1 are the horizontal and vertical loads of the conductor gripped by the upper suspension clamp, and the horizontal and vertical loads of the conductor gripped by the lower suspension clamp Assuming that the load is H2 and V2, the distance L3 from the vertical line passing through the pivot point of the main yoke bracket to the vertical bracket and the vertical line passing through the attachment points of the upper and lower suspension clamps is expressed by the formula L3 = [(H1 × L1) + {H2 × (L1 + L2)}] / (V1 + V2)
V suspension suspension for vertical two conductors, characterized in that