【０００１】
【発明の属する技術分野】
この発明は配電系統の区分開閉器等として使用される真空スイッチ管を用いた真空開閉器に関するものである。
【０００２】
【従来の技術】
従来の真空スイッチ管を用いた真空開閉器としては、例えば実開昭６４−１２３４０号公報に開示されたものがある。その構成の１相の配置状態を示す断面図を図４、全体構成の正面図を図５に示す。図において、１は真空スイッチ管であり、絶縁容器１ｄの内部に固定電極１ａと可動電極１ｂが対向して配置され、固定電極１ａは絶縁容器１ｄの一端側に支持され、可動電極１ｂはベローズ１ｃを介して絶縁容器１ｄの他端側に支持された構成である。２は可動電極１ｂに取り付けられた開閉軸、３は閉極時に可動電極１ｂに所定の押圧力を与える押圧ばね、４は可とう導体、５は開閉器容器、６、７はブッシング、８は駆動軸であり、先端部は容器５の内壁に回転自在に軸受８ａにより支持され、容器５を貫通する部分は軸受８ｂにより回転自在に支持されシール８ｃにより回転自在に封止されている。９は絶縁材料で形成された開閉リンクであり、結合ピン９ａで開閉軸２と回転自在に結合されている。１０は開閉部であり、真空スイッチ管１、開閉軸２、押圧ばね３、可とう導体４、開閉器容器５、ブッシング６、７、操作軸８、開閉リンク９で構成されている。
【０００３】
１１は開閉軸２を駆動する駆動機構、１２は駆動軸８を回転させる駆動リンク、１３は操作箱である。２０は操作装置であり、操作箱１３に駆動機構１１、駆動リンク１２が収容され、開閉器容器５と直結されて駆動軸８を回転させて開閉操作する構成である。通常の真空開閉器は、開閉器容器５に３相並列に配置されている。
【０００４】
従来の真空開閉器は以上のように構成され、真空スイッチ管１は開閉動作指令があると、操作装置２０の駆動機構１１が動作して駆動リンク１２が所定の角度回転し、押圧ばね３を介して可動電極１ｂを往復動作させることにより、固定電極１ａと可動電極１ｂが接離して開閉する。
【０００５】
真空スイッチ管１の接触部は、固定電極１ａと可動電極１ｂの端面を突き合わせたバットコンタクトと呼ばれる構成であり、通電性能を確保するためには大きな接触圧力を必要とする。従来の図４、図５の構成では、真空スイッチ管１の可動電極１ｂに押圧力を与える開閉リンク９は、操作装置２０の駆動機構１１により駆動される駆動軸８に装着され、駆動軸８は図５の正面図の開閉器容器５の両側壁に回転自在に支持され、駆動機構１１により駆動リンク１２が回転し、操作軸８が回転することにより、開閉リンク９が回転して真空スイッチ管１の可動電極１ｂに押圧力を与える構成であり、真空スイッチ管１に与える押圧力の反力が開閉器容器５の真空スイッチ管１が支持されている開閉器容器５の後部壁と駆動軸８が支持されている両側壁との間に大きなねじれ力が加わる。真空スイッチ管１は固定電極１ａと可動電極１ｂの極間耐電圧は高く、開極状態の開離距離は短く押圧力を与えるストロークは短いので、開閉器容器５は押圧時のねじれ力によるたわみ量が少なくなるように強固に製作しておくことが必要である。
【０００６】
【発明が解決しようとする課題】
以上のように従来の真空開閉器は、閉極時の真空スイッチ管１の固定電極１ａと可動電極１ｂの接触部の接触状態を確保するためには大きな押圧力を与える必要があり、駆動軸８の支持部と真空スイッチ管１の支持部は離れた位置にあり、真空スイッチ管１の閉極時の押圧力により駆動軸８の支持部と真空スイッチ管１の支持部の間のたわみが生じないように開閉器容器５の剛性を高くした設計が必要である。また、真空スイッチ管１の可動電極１ｂを動作させる開閉リンク９の先端部と駆動軸８との間に加わる電圧に耐える絶縁距離が必要であり、開閉器容器５との絶縁距離を確保すると開閉器容器の寸法が大きくなり、また、開閉リンク９の部分には真空スイッチ管１の可動電極１ｂと駆動軸８との間の距離と押圧力の積のモーメントが加わり、このモーメントが開閉器容器５の真空スイッチ管１の支持点と駆動軸８の支持点に加わり、これに対して開閉器容器５の剛性を高めてたわみを少なくする必要があり、重量が重くなる問題点があった。
【０００７】
この発明は上記のような問題点を解消するためになされたものであり、真空スイッチ管の開閉操作時および閉極時に与えられる押圧力の反力による開閉器容器のたわみが小さくなるとともに寸法が縮小され、軽量化された真空開閉器を提供することを目的とする。
【０００８】
【課題を解決するための手段】
この発明の請求項１に係る真空開閉器は、複数の真空スイッチ管の固定電極側を開閉器容器の一側面に絶縁部材を介して絶縁支持し、操作機構は、真空スイッチ管を絶縁支持した位置に対応して操作リンクを装着し、開閉器容器の側面の真空スイッチ管を絶縁支持した位置に近接して回転自在に支持し、一端は操作装置に連結した駆動軸と、中間位置は真空スイッチ管を絶縁支持する絶縁部材の頂部に回転自在に支持し、先端部は閉極時に固定電極と可動電極の接触部に所定の押圧力を与える押圧ばねを介して開閉動作させる開閉リンクと、真空スイッチ管に平行に近接して配置し、駆動軸に装着した操作リンクと開閉リンクの駆動軸側との間を連結した絶縁ロッドとで構成したものである。
【０００９】
この発明の請求項２に係る真空開閉器は、複数の真空スイッチ管の固定電極側を開閉器容器の一側面に絶縁部材を介して絶縁支持し、操作機構は、真空スイッチ管を絶縁支持した位置に対応して操作リンクを装着し、開閉器容器の側面の真空スイッチ管を絶縁支持した位置に近接して回転自在に支持し、一端は操作装置に連結した駆動軸と、先端部が駆動軸が配置された背面側の真空スイッチ管を絶縁支持した絶縁部材の頂部に回転自在に支持し、中間部で閉極時に固定電極と可動電極の接触部に所定の押圧力を与える押圧ばねを介して開閉動作させる開閉リンクと、真空スイッチ管に平行に近接して配置し、駆動軸に装着された操作リンクと開閉リンクとの間を連結した絶縁ロッドとで構成したものである。
【００１０】
この発明の請求項３に係る真空開閉器は、請求項１または請求項２の開閉器容器内の複数の真空スイッチ管それぞれの周囲に絶縁バリアを配置した構成としたものである。
【００１１】
この発明の請求項４に係る真空開閉器は、請求項１または請求項２の構成の真空スイッチ管の固定電極から導出された端子および可動電極側から導出された端子のそれぞれの器外側端部は、それぞれ接続ケーブルの端部が圧着接続され、その外周部に絶縁キャップを被した構成としたものである。
【００１２】
この発明の請求項５に係る真空開閉器は、請求項１乃至請求項４の構成の開閉器容器を密閉構造に構成し、内部に絶縁ガスを封入したものである。
【００１３】
【発明の実施の形態】
実施の形態１．
実施の形態１の構成の断面図を図１、平面図を図２に示す。図において、３１は真空スイッチ管であり、絶縁容器３１ｄの内部に固定電極３１ａと可動電極３１ｂが対向して配置され、固定電極３１ａは絶縁容器３１ｄの端部に固定され、可動電極３１ｂはベローズ３１ｃを介して絶縁容器３１ｄの端部に支持された構成であり、３相用の場合は図２のように３相が平行に配置されている。３２は真空スイッチ管３１の可動電極３１ｂの先端に付加された開閉軸、３３は可動電極３１ｂに所定の押圧力を与える押圧ばね、３４は可動電極３１ｂ側から外部に中継する内部導体、３５は内部導体３４の器内側に取り付けられた接続導体、３６は真空スイッチ管３１の可動電極３１ｂと接続導体３５との間を接続する可とう導体、３８は真空スイッチ管３１等の構成部分を収容する開閉器容器、３９は３相の真空スイッチ管それぞれの周囲に配置された絶縁バリヤである。開閉器容器３８内には通常は大気圧の空気が封入された構成であるが、ＳＦ６ガスまたはＳＦ６ガスと窒素ガスなどを混合した絶縁ガスを封入すると真空スイッチ管３１と開閉器容器３６との距離および真空スイッチ管３１の相互間距離を短縮することができる。
【００１４】
４１は真空スイッチ管３１を開閉器容器３８に支持する絶縁部材であり、支持部の中心に貫通穴が設けられ、器内側には真空スイッチ管３１を包囲する円筒部４１ａ、器外側には接続ケーブルとの接続部を包囲し、外周はテーパ状に形成された円筒部４１ｂを備え、開閉器容器３８の側面との間にガスケット４１ｇを配置して装着される。４２は第一の端子であり、真空スイッチ管３１と連結して支持するねじ４２ａが設けられ、器外側は接続ケーブルの端部と圧着接続する圧着部４２ｂが形成されており、絶縁部材４１との間にはガスケット４２ｇが配置されて密封状態が保持される。４３は接続ケーブルであり、端部が第一の端子４２の圧着部４２ｂに圧着接続される。４４は接続ケーブル４３を挿通して接続ケーブル４３の外周および絶縁部材４１の器外側円筒部４１ｂの外周テーパ面に密着して装着される絶縁キャップである。４０は真空スイッチ管支持絶縁座であり、絶縁部材４１、第一の端子４２、接続ケーブル４３、絶縁キャップ４４で構成されている。
【００１５】
５１は内部導体３４を開閉器容器３８に支持する絶縁部材であり、支持部の中心に貫通穴が設けられ、器内側には内部導体３４を包囲する円筒部５１ａ、器外側には接続ケーブルとの接続部を包囲し、外周はテーパ状に形成された円筒部５１ｂを備え、開閉器容器３８の側面との間にガスケット５１ｇが配置されて装着される。５２は第二の端子であり、内部導体３４と連結するねじ５２ａが設けられ、器外側は接続ケーブルの端部と圧着接続する圧着部５２ｂが形成され、絶縁部材５１との間にはガスケット５２ｇが配置されて密封状態が保持される。５３は接続ケーブルであり、端部が第二の端子５２の圧着部５２ｂに圧着接続される。５４は接続ケーブル５３を挿通して接続ケーブル５３の外周および絶縁部材５１の器外側円筒部５１ｂの外周テーパ面に密着して装着される絶縁キャップである。５０は内部導体支持絶縁座であり、絶縁部材５１、第二の端子５２、接続ケーブル５３、絶縁キャップ５４で構成されている。５５ａは零相変流器、５５ｂは過電流変流器である。
【００１６】
６１は真空スイッチ管３１を開閉動作させる駆動軸であり、開閉器容器３８の側面に支持された真空スイッチ管３１に近接して回転自在に支持され、一端側は開閉器容器３８の側面を貫通して外部に突出し、端部に駆動リンク６７が取り付けられ、操作装置６８に連結されている。６２は駆動軸６１の真空スイッチ管３１の支持部に対応した位置に装着された操作リンク、６３は真空スイッチ管３１に平行に近接して配置された絶縁ロッドであり、一端は操作リンク６２の端部に連結ピン６２ａにより連結されている。
【００１７】
６４は真空スイッチ管３１を開閉する開閉リンクであり、先端部は真空スイッチ管３１の先端に取り付けられた開閉軸３２の端部に押圧ばね３３を装着して連結ピン６４ａで連結され、駆動軸６１側の端部は絶縁ロッド６３の端部に連結ピン６４ｂにより連結されている。開閉軸３２の端部の連結ピン６４ａの挿入穴は、押圧時に押圧ばね３３を介して可動電極３１ｂに所定の押圧力が安定して加わるように長穴に形成されている。６５は絶縁部材４１の器内側の円筒部４１ａの先端部に装着された開閉リンク６４を回転自在に支持する開閉リンク支持部材である。６０は操作機構であり、駆動軸６１、操作リンク６２、絶縁ロッド６３、開閉リンク６４、開閉リンク支持部材６５で構成されている。開閉器容器３８内に絶縁ガスを封入する場合は、駆動軸６１の開閉器容器３８の側壁を貫通する部分が回転自在に封止されている。
【００１８】
このように構成された真空開閉器において、開閉操作指令があると、操作装置６８に連結された駆動軸６１、操作リンク６２が回転し、絶縁ロッド６３が軸方向に往復して開閉リンク６４が支持された開閉リンク支持部材６５の連結ピン６５ａを支点として回転し、先端部が押圧ばね３３を介して真空スイッチ管３１の可動電極３１ｂを開閉動作させる。閉極時には押圧ばね３３を介して真空スイッチ管３１の可動電極３１ｂを押圧するので安定した押圧力が加えられる。
【００１９】
真空スイッチ管１の閉極時には固定電極３１ａと可動電極３１ｂの接触部に加えられた押圧力の反力が真空スイッチ管３１の支持部と駆動軸６１の支持部に曲げモーメントとして働くこととなるが、それぞれの支持部は開閉器容器３８の一側面に近接した位置としているので、開閉器容器３８に加わるモーメントは小さく真空スイッチ管３１および駆動軸６１を支持する側面の剛性をわずかに高くすることでたわみが生じなくなり、開閉器容器３８の軽量化が容易に実現できる。
【００２０】
操作機構６０の絶縁ロッド６３を真空スイッチ管３１と平行に近接して配置したことにより、真空スイッチ管３１を開閉操作する操作機構６０の動作範囲が小さくなり、複数の真空スイッチ管３１それぞれの周囲に絶縁バリヤ３９を配置すると真空スイッチ管３１の相間距離、および開閉器容器３８との間の対地絶縁距離の短縮が可能であり、開閉器容器３８がさらに小さくすることができる。さらに開閉器容器３８の内部にはＳＦ６ガスまたはＳＦ６ガスと窒素ガスの混合した絶縁ガスを封入すると、開閉器容器３８の内部の絶縁耐力が確保され、絶縁距離がさらに短縮され、開閉器容器３８の寸法が大幅に縮小でき、開閉器容器３８の寸法をさらに縮小して軽量に構成することができる。
【００２１】
真空スイッチ管支持絶縁座４０、内部導体支持絶縁座５０の器外側の接続ケーブル４３、５３は、第一の端子４２および第二の端子５２に圧着接続し、絶縁部材４１、５１の器外側の外周および接続ケーブル４３、５３の外周に絶縁キャップ４４を密着して装着したことにより、充電部分は隠閉され、絶縁距離の確保等の外部条件を考慮することなく設置できる真空開閉器が構成できる。
【００２２】
実施の形態２．
実施の形態２の構成を図３に示す。実施の形態２は、真空スイッチ管を開閉する開閉リンクの先端部を絶縁部材の器内側円筒部の駆動軸が配置された背面側の頂部に回転自在に支持した構成である。図において、真空スイッチ管３１、開閉軸３２、押圧ばね３３、内部導体３４、接続導体３５、可とう導体３６、開閉器容器３８、絶縁バリヤ３９、内部導体支持絶縁座５０は実施の形態１と同一である。７０は真空スイッチ管支持絶縁座であり、実施の形態１の真空スイッチ管支持絶縁座４０の絶縁部材以外の部分は実施の形態１と同一である。７１は絶縁部材であり、器内側に真空スイッチ管１を包囲する円筒部７１ａの駆動軸６１が配置された背面側の頂部に開閉リンクの先端部が支持できるように構成し、器外側の接続ケーブルの接続部を包囲する円筒部７１ｂは実施の形態１の絶縁部材４１の器外側円筒部４１ｂと同様に形成している。
【００２３】
８０は操作機構であり、実施の形態１の操作機構６０とは、開閉リンクの先端を支持した点が相違する。駆動軸６１、操作リンク６２は実施の形態１と同一である。８３は絶縁ロッド、８４は開閉リンク、８５は絶縁部材７１の器内側円筒部７１ａの駆動軸６１が配置された背面側の頂部に取り付けられた開閉リンク支持部材である。この構成では開閉リンク８４の先端部を操作機構８０の駆動軸６１が配置された背面側の頂部に設けられた開閉リンク支持部材８５に連結ピン８５ａにより回転自在に支持され、中間部は真空スイッチ管３１の開閉軸３２に連結ピン８４ａにより連結され、開閉リンク８４の開閉軸６１側の端部と操作リンク６２の先端部との間を真空スイッチ管３１に平行に近接して配置された絶縁ロッド８３により連結した構成であり、開閉リンク８４と絶縁ロッド８３とは連結ピン８４ｂ、絶縁ロッド８３と操作リンク６２は連結ピン６２ａで回転自在に結合されている。
【００２４】
このように開閉リンク８４の支点を絶縁部材７１の器内側円筒部７１ａの駆動軸６２の背面側の頂部としたことにより、実施の形態１における絶縁バリヤ３９を配置したことによる相間距離および対地絶縁距離が短縮できる効果、器外側の接続ケーブルを圧着接続して絶縁キャップを被せたことによる絶縁距離の確保が外部条件を考慮することなく接地できる効果に加えて、真空スイッチ管３１の可動電極３１ｂを押圧する押圧力は小さな操作力で所定の押圧力を与えることができ、絶縁ロッド８３の部分の操作力の方向は引張方向であり、開閉リンク８３の動作行程は長くなるが、小さな操作力で所定の押圧力が加えられるようになり、操作機構８０をさらに軽量に構成できる効果を有する。
【００２５】
【発明の効果】
この発明の請求項１に係る真空開閉器は、複数の真空スイッチ管の固定電極側を開閉器容器の一側面に絶縁部材を介して絶縁支持し、操作機構は、真空スイッチ管を絶縁支持した位置に対応して操作リンクを装着し、開閉器容器の側面の真空スイッチ管を絶縁支持した位置に近接して回転自在に支持し、一端は操作装置に連結した駆動軸と、中間位置は真空スイッチ管を絶縁支持する絶縁部材の頂部に回転自在に支持し、先端部は閉極時に固定電極と可動電極の接触部に所定の押圧力を与える押圧ばねを介して開閉動作させる開閉リンクと、真空スイッチ管に平行に近接して配置し、駆動軸に装着した操作リンクと開閉リンクの駆動軸側との間を連結した絶縁ロッドとで構成したので、真空スイッチ管の閉極時に固定電極と可動電極の接触部に加えられたときに働く押圧力の反力の作用点が開閉器容器の真空スイッチ管と駆動軸が支持された位置でありその間隔は狭くたわみを生じるモーメントは小さく、開閉器容器は真空スイッチ管と駆動軸が支持された側面のみ相応に剛性を大きくすることでたわみがなくなり、操作機構部分の占有容積も小さくなるので、開閉器容器の寸法を縮小し軽量化が容易に実現できる。
【００２６】
この発明の請求項２に係る真空開閉器は、複数の真空スイッチ管の固定電極側を開閉器容器の一側面に絶縁部材を介して絶縁支持し、操作機構は、真空スイッチ管を絶縁支持した位置に対応して操作リンクを装着し、開閉器容器の側面の真空スイッチ管を絶縁支持した位置に近接して回転自在に支持し、一端は操作装置に連結した駆動軸と、先端部が駆動軸が配置された背面側の真空スイッチ管を絶縁支持した絶縁部材の頂部に回転自在に支持し、中間部で閉極時に固定電極と可動電極の接触部に所定の押圧力を与える押圧ばねを介して開閉動作させる開閉リンクと、真空スイッチ管に平行に近接して配置し、駆動軸に装着された操作リンクと開閉リンクとの間を連結した絶縁ロッドとで構成したので、真空スイッチ管の接触部を押圧する必要な押圧力が小さな操作力で与えることができ、開閉器容器のさらなる小形化と操作機構のより軽量化した真空開閉器が構成できる。
【００２７】
この発明の請求項３に係る真空開閉器は、請求項１または請求項２の開閉器容器の内部の構成を、開閉器容器内の複数の真空スイッチ管それぞれに絶縁バリアを配置した構成としたので、真空スイッチ管の相互間、真空スイッチ管と器内と開閉器容器壁との間の絶縁距離を短くすることができ、開閉器容器の寸法がより縮小できる。
【００２８】
この発明の請求項４に係る真空開閉器は、請求項１または請求項２の構成の真空スイッチ管の固定電極から導出された端子および可動電極側から導出された端子のそれぞれの器外側端部は、それぞれ接続ケーブルの端部が圧着接続され、その外周部に絶縁キャップを被した構成としたので、接続ケーブルとの接続部がコンパクトになり接続作業も容易となり、充電部分は隠閉され、絶縁距離の確保等の外気条件を考慮することなく設置できる真空開閉器が構成できる。
【００２９】
この発明の請求項５に係る真空開閉器は、請求項１乃至請求項４の構成の開閉器容器内部には最低周囲温度のときに大気圧となるように絶縁ガスを封入したので、開閉器容器を圧力容器とすることなく、小形軽量の真空開閉器を構成することができる。
【図面の簡単な説明】
【図１】 実施の形態１の断面図である。
【図２】 実施の形態１の平面図である。
【図３】 実施の形態２の断面図である。
【図４】 従来の真空開閉器の横断面図である。
【図５】 従来の真空開閉器の正面から見た断面図である。
【符号の説明】
３１ 真空スイッチ管、３２ 駆動軸、３３ 押圧ばね、３４ 内部導体、
３５ 接続導体、３６ 可とう導体、４０ 真空スイッチ管支持絶縁座、
４１ 絶縁部材、４２ 第一の端子、４３ 接続ケーブル、
４４ 絶縁キャップ、５０ 内部導体支持絶縁座、５１ 絶縁部材、
５２ 第二の端子、５３ 接続導体、５４ 絶縁キャップ、６０ 操作機構、
６１ 駆動軸、６２ 操作リンク、６３ 絶縁ロッド、６４ 開閉リンク、
６５ 開閉リンク支持部材、６７ 駆動リンク、６８ 操作装置、
７０ 真空スイッチ管支持絶縁座、７１ 絶縁部材、８０ 操作機構、
８３ 絶縁ロッド、８４ 開閉リンク、８５ 開閉リンク支持部材。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vacuum switch using a vacuum switch tube used as a section switch for a distribution system.
[0002]
[Prior art]
An example of a conventional vacuum switch using a vacuum switch tube is disclosed in Japanese Utility Model Laid-Open No. 64-12340. FIG. 4 is a cross-sectional view showing an arrangement state of one phase of the configuration, and FIG. 5 is a front view of the entire configuration. In the figure, reference numeral 1 denotes a vacuum switch tube. A fixed electrode 1a and a movable electrode 1b are arranged inside an insulating container 1d so as to face each other, the fixed electrode 1a is supported on one end side of the insulating container 1d, and the movable electrode 1b is a bellows. It is the structure supported by the other end side of the insulation container 1d through 1c. 2 is an opening / closing shaft attached to the movable electrode 1b, 3 is a pressing spring for applying a predetermined pressing force to the movable electrode 1b at the time of closing, 4 is a flexible conductor, 5 is a switch container, 6 and 7 are bushings, It is a drive shaft, and a tip end portion is rotatably supported on the inner wall of the container 5 by a bearing 8a, and a portion passing through the container 5 is rotatably supported by a bearing 8b and is rotatably sealed by a seal 8c. Reference numeral 9 denotes an open / close link made of an insulating material, which is rotatably connected to the open / close shaft 2 by a connecting pin 9a. Reference numeral 10 denotes an opening / closing section, which includes a vacuum switch tube 1, an opening / closing shaft 2, a pressing spring 3, a flexible conductor 4, a switch container 5, bushings 6 and 7, an operation shaft 8, and an opening / closing link 9.
[0003]
11 is a drive mechanism for driving the opening / closing shaft 2, 12 is a drive link for rotating the drive shaft 8, and 13 is an operation box. Reference numeral 20 denotes an operating device, in which the drive mechanism 11 and the drive link 12 are accommodated in the operation box 13 and are directly connected to the switch container 5 to rotate the drive shaft 8 to perform an opening / closing operation. A normal vacuum switch is arranged in three phases in the switch container 5.
[0004]
The conventional vacuum switch is configured as described above. When the vacuum switch tube 1 has an opening / closing operation command, the drive mechanism 11 of the operating device 20 operates to rotate the drive link 12 by a predetermined angle, and the pressing spring 3 is moved. By reciprocating the movable electrode 1b via the fixed electrode 1a, the fixed electrode 1a and the movable electrode 1b are opened and closed.
[0005]
The contact portion of the vacuum switch tube 1 has a configuration called a butt contact in which the end surfaces of the fixed electrode 1a and the movable electrode 1b are brought into contact with each other, and requires a large contact pressure in order to ensure energization performance. 4 and 5, the open / close link 9 that applies a pressing force to the movable electrode 1 b of the vacuum switch tube 1 is attached to the drive shaft 8 driven by the drive mechanism 11 of the operating device 20. 5 is rotatably supported on both side walls of the switch container 5 in the front view of FIG. 5, the drive link 12 is rotated by the drive mechanism 11, and the operating shaft 8 is rotated, whereby the open / close link 9 is rotated and the vacuum switch is rotated. The structure is configured to apply a pressing force to the movable electrode 1b of the tube 1, and the reaction force of the pressing force applied to the vacuum switch tube 1 is driven by the rear wall of the switch container 5 on which the vacuum switch tube 1 of the switch container 5 is supported. A large torsional force is applied between the side walls on which the shaft 8 is supported. Since the vacuum switch tube 1 has a high withstand voltage between the fixed electrode 1a and the movable electrode 1b, and the opening distance is short and the stroke for applying the pressing force is short, the switch container 5 is deflected by the twisting force during pressing. It is necessary to manufacture firmly so as to reduce the amount.
[0006]
[Problems to be solved by the invention]
As described above, the conventional vacuum switch needs to apply a large pressing force in order to ensure the contact state of the contact portion between the fixed electrode 1a and the movable electrode 1b of the vacuum switch tube 1 at the time of closing. The support portion 8 and the support portion of the vacuum switch tube 1 are separated from each other, and the deflection between the support portion of the drive shaft 8 and the support portion of the vacuum switch tube 1 is caused by the pressing force when the vacuum switch tube 1 is closed. A design in which the rigidity of the switch container 5 is increased so as not to occur. In addition, an insulation distance that can withstand the voltage applied between the tip of the open / close link 9 that operates the movable electrode 1b of the vacuum switch tube 1 and the drive shaft 8 is necessary. The size of the container is increased, and the moment of the product of the distance between the movable electrode 1b of the vacuum switch tube 1 and the drive shaft 8 and the pressing force is applied to the opening / closing link 9, and this moment is applied to the switch container. In addition to the support point of the vacuum switch tube 1 and the support point of the drive shaft 8, it is necessary to increase the rigidity of the switch container 5 to reduce the deflection, and there is a problem that the weight increases.
[0007]
The present invention has been made to solve the above-mentioned problems, and the deflection of the switch container due to the reaction force of the pressing force applied at the time of opening and closing the vacuum switch tube and at the time of closing is reduced, and the dimensions are reduced. An object of the present invention is to provide a vacuum switch that is reduced in size and weight.
[0008]
[Means for Solving the Problems]
The vacuum switch according to claim 1 of the present invention insulates and supports the fixed electrode side of the plurality of vacuum switch tubes on one side surface of the switch container via an insulating member, and the operation mechanism insulates and supports the vacuum switch tube. The operation link is attached corresponding to the position, the vacuum switch tube on the side of the switch container is rotatably supported close to the insulated support position, one end is connected to the operating device, and the intermediate position is vacuum An open / close link that rotatably supports the top of an insulating member that insulates and supports the switch tube, and that has a tip that opens and closes via a pressing spring that applies a predetermined pressing force to the contact portion of the fixed electrode and the movable electrode when the pole is closed; It is configured by an insulating rod that is arranged in parallel and close to the vacuum switch tube and that connects between the operation link attached to the drive shaft and the drive shaft side of the open / close link.
[0009]
The vacuum switch according to claim 2 of the present invention insulates and supports the fixed electrode side of the plurality of vacuum switch tubes on one side surface of the switch container via an insulating member, and the operation mechanism insulates and supports the vacuum switch tube. An operation link is attached corresponding to the position, and the vacuum switch tube on the side of the switch container is rotatably supported close to the position where the insulation support is provided. One end is a drive shaft connected to the operation device, and the tip is driven A pressing spring that rotatably supports the top of the insulating member that supports and insulates the vacuum switch tube on the back side where the shaft is arranged, and applies a predetermined pressing force to the contact portion of the fixed electrode and the movable electrode when the intermediate portion is closed. An opening / closing link that is opened / closed via an opening and an insulating rod that is disposed in parallel and close to the vacuum switch tube and that connects the operation link attached to the drive shaft and the opening / closing link.
[0010]
A vacuum switch according to a third aspect of the present invention has a configuration in which an insulating barrier is disposed around each of the plurality of vacuum switch tubes in the switch container of the first or second aspect.
[0011]
According to a fourth aspect of the present invention, there is provided a vacuum switch according to the first or second aspect, wherein each of the outer end portions of the terminal derived from the fixed electrode and the terminal derived from the movable electrode side of the vacuum switch tube of the configuration of the first or second aspect. In this case, the end portions of the connection cables are crimped and connected, and the outer peripheral portion is covered with an insulating cap.
[0012]
A vacuum switch according to a fifth aspect of the present invention is such that the switch container of the first to fourth aspects is configured in a sealed structure, and an insulating gas is enclosed therein.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
A cross-sectional view of the structure of the first embodiment is shown in FIG. 1, and a plan view is shown in FIG. In the figure, reference numeral 31 denotes a vacuum switch tube. A fixed electrode 31a and a movable electrode 31b are disposed inside an insulating container 31d so as to face each other, the fixed electrode 31a is fixed to an end of the insulating container 31d, and the movable electrode 31b is a bellows. The structure is supported by the end of the insulating container 31d via 31c. In the case of three phases, the three phases are arranged in parallel as shown in FIG. 32 is an opening / closing shaft added to the tip of the movable electrode 31b of the vacuum switch tube 31, 33 is a pressing spring for applying a predetermined pressing force to the movable electrode 31b, 34 is an internal conductor relaying from the movable electrode 31b side to the outside, and 35 is A connection conductor attached to the inner side of the internal conductor 34, 36 is a flexible conductor connecting the movable electrode 31 b of the vacuum switch tube 31 and the connection conductor 35, and 38 accommodates components such as the vacuum switch tube 31. The switch container 39 is an insulating barrier arranged around each of the three-phase vacuum switch tubes. Normally, the atmospheric pressure air is enclosed in the switch container 38. However, when an insulating gas containing SF6 gas or a mixture of SF6 gas and nitrogen gas is sealed, the vacuum switch tube 31 and the switch container 36 are separated. The distance and the distance between the vacuum switch tubes 31 can be shortened.
[0014]
Reference numeral 41 denotes an insulating member for supporting the vacuum switch tube 31 on the switch container 38. A through hole is provided in the center of the support portion, a cylindrical portion 41a surrounding the vacuum switch tube 31 is connected to the inside of the device, and a connection is made to the outside of the device. The connection portion with the cable is surrounded, and the outer periphery includes a cylindrical portion 41b formed in a tapered shape, and a gasket 41g is disposed between the side surface of the switch container 38 and attached. Reference numeral 42 denotes a first terminal, which is provided with a screw 42a that is connected to and supported by the vacuum switch tube 31, and a crimping portion 42b that is crimped and connected to the end of the connection cable is formed on the outside of the device. Between them, a gasket 42g is arranged to maintain a sealed state. Reference numeral 43 denotes a connection cable, and an end portion thereof is crimped and connected to the crimping portion 42 b of the first terminal 42. Reference numeral 44 denotes an insulating cap that is inserted through the connection cable 43 and is attached in close contact with the outer periphery of the connection cable 43 and the outer peripheral tapered surface of the outer cylindrical portion 41 b of the insulating member 41. Reference numeral 40 denotes a vacuum switch tube support insulating seat, which includes an insulating member 41, a first terminal 42, a connection cable 43, and an insulating cap 44.
[0015]
51 is an insulating member for supporting the inner conductor 34 to the switch container 38, a through hole is provided in the center of the support portion, a cylindrical portion 51a surrounding the inner conductor 34 on the inner side of the device, and a connection cable on the outer side of the device. The outer peripheral portion includes a cylindrical portion 51b formed in a tapered shape, and a gasket 51g is disposed between the side surface of the switch container 38 and attached thereto. 52 is a second terminal, provided with a screw 52a to be connected to the inner conductor 34, and a crimping part 52b to be crimped and connected to the end of the connection cable is formed on the outside of the casing. Is placed and the sealed state is maintained. Reference numeral 53 denotes a connection cable, and an end portion thereof is crimped and connected to a crimping portion 52 b of the second terminal 52. An insulating cap 54 is inserted through the connection cable 53 and is attached in close contact with the outer periphery of the connection cable 53 and the outer peripheral tapered surface of the outer cylindrical portion 51b of the insulating member 51. Reference numeral 50 denotes an inner conductor support insulating seat, which includes an insulating member 51, a second terminal 52, a connection cable 53, and an insulating cap 54. 55a is a zero-phase current transformer, and 55b is an overcurrent current transformer.
[0016]
Reference numeral 61 denotes a drive shaft for opening and closing the vacuum switch tube 31, which is rotatably supported in the vicinity of the vacuum switch tube 31 supported on the side surface of the switch container 38, and one end penetrates the side surface of the switch container 38. The drive link 67 is attached to the end portion and is connected to the operation device 68. 62 is an operation link mounted at a position corresponding to the support portion of the vacuum switch tube 31 of the drive shaft 61, 63 is an insulating rod disposed in parallel and close to the vacuum switch tube 31, and one end of the operation link 62. It is connected to the end by a connecting pin 62a.
[0017]
Reference numeral 64 denotes an opening / closing link for opening and closing the vacuum switch tube 31, and a tip end portion of the opening / closing shaft 32 attached to the tip end of the vacuum switch tube 31 is connected by a connecting pin 64a with a pressing spring 33 attached thereto. The end portion on the 61 side is connected to the end portion of the insulating rod 63 by a connecting pin 64b. The insertion hole of the connecting pin 64a at the end of the opening / closing shaft 32 is formed as a long hole so that a predetermined pressing force is stably applied to the movable electrode 31b via the pressing spring 33 when pressed. Reference numeral 65 denotes an open / close link support member that rotatably supports the open / close link 64 attached to the tip of the cylindrical portion 41a inside the insulating member 41. Reference numeral 60 denotes an operation mechanism, which includes a drive shaft 61, an operation link 62, an insulating rod 63, an opening / closing link 64, and an opening / closing link support member 65. When the insulating gas is sealed in the switch container 38, a portion of the drive shaft 61 that penetrates the side wall of the switch container 38 is sealed rotatably.
[0018]
In the vacuum switch configured as described above, when an opening / closing operation command is issued, the drive shaft 61 and the operation link 62 connected to the operation device 68 rotate, and the insulating rod 63 reciprocates in the axial direction to open the opening / closing link 64. The supported link pin 65a of the open / close link support member 65 rotates around a fulcrum, and the distal end portion opens / closes the movable electrode 31b of the vacuum switch tube 31 via the pressing spring 33. During closing, the movable electrode 31b of the vacuum switch tube 31 is pressed via the pressing spring 33, so that a stable pressing force is applied.
[0019]
When the vacuum switch tube 1 is closed, the reaction force of the pressing force applied to the contact portion between the fixed electrode 31a and the movable electrode 31b acts as a bending moment on the support portion of the vacuum switch tube 31 and the support portion of the drive shaft 61. However, since each support portion is positioned close to one side surface of the switch container 38, the moment applied to the switch container 38 is small, and the rigidity of the side surface supporting the vacuum switch tube 31 and the drive shaft 61 is slightly increased. Thus, no deflection occurs, and the weight of the switch container 38 can be easily realized.
[0020]
By disposing the insulating rod 63 of the operation mechanism 60 in close proximity to the vacuum switch tube 31, the operating range of the operation mechanism 60 for opening and closing the vacuum switch tube 31 is reduced, and the surroundings of each of the plurality of vacuum switch tubes 31 are reduced. If the insulating barrier 39 is disposed on the side, the distance between the phases of the vacuum switch tube 31 and the ground insulating distance between the switch container 38 and the switch container 38 can be shortened, and the switch container 38 can be further reduced. Further, when an insulating gas containing SF6 gas or a mixture of SF6 gas and nitrogen gas is sealed inside the switch container 38, the dielectric strength within the switch container 38 is secured, the insulation distance is further shortened, and the switch container 38 The size of the switch container 38 can be greatly reduced, and the size of the switch container 38 can be further reduced to make it lightweight.
[0021]
The external connection cables 43 and 53 of the vacuum switch tube support insulating seat 40 and the inner conductor support insulating seat 50 are crimped to the first terminal 42 and the second terminal 52, and are connected to the outer sides of the insulating members 41 and 51. By attaching the insulating cap 44 in close contact with the outer periphery and the outer periphery of the connection cables 43, 53, the charged part is concealed, and a vacuum switch that can be installed without considering external conditions such as securing an insulation distance can be configured. .
[0022]
Embodiment 2. FIG.
The configuration of the second embodiment is shown in FIG. In the second embodiment, the end of the open / close link that opens and closes the vacuum switch tube is rotatably supported on the top on the back side where the drive shaft of the inner cylindrical portion of the insulating member is disposed. In the figure, the vacuum switch tube 31, the open / close shaft 32, the pressing spring 33, the internal conductor 34, the connection conductor 35, the flexible conductor 36, the switch container 38, the insulation barrier 39, and the internal conductor support insulating seat 50 are the same as those in the first embodiment. Are the same. Reference numeral 70 denotes a vacuum switch tube support insulating seat, and portions other than the insulating member of the vacuum switch tube support insulating seat 40 of the first embodiment are the same as those of the first embodiment. 71 is an insulating member, and is configured so that the tip of the open / close link can be supported on the top of the back side where the drive shaft 61 of the cylindrical portion 71a surrounding the vacuum switch tube 1 is disposed, and connected to the outside of the device The cylindrical portion 71b surrounding the cable connection portion is formed in the same manner as the outer cylindrical portion 41b of the insulating member 41 of the first embodiment.
[0023]
Reference numeral 80 denotes an operation mechanism, which is different from the operation mechanism 60 of the first embodiment in that the tip of the opening / closing link is supported. The drive shaft 61 and the operation link 62 are the same as those in the first embodiment. 83 is an insulating rod, 84 is an opening / closing link, and 85 is an opening / closing link support member attached to the top of the insulating member 71 on the back side where the drive shaft 61 of the inner cylindrical portion 71a is disposed. In this configuration, the front end of the open / close link 84 is rotatably supported by the connecting pin 85a on the open / close link support member 85 provided on the top on the back side where the drive shaft 61 of the operation mechanism 80 is disposed, and the intermediate portion is a vacuum switch. Insulation that is connected to the open / close shaft 32 of the tube 31 by a connecting pin 84a, and that is disposed between the end of the open / close link 84 on the open / close shaft 61 side and the tip of the operation link 62 in parallel and close to the vacuum switch tube 31. The open / close link 84 and the insulating rod 83 are connected by a connecting pin 84b, and the insulating rod 83 and the operation link 62 are connected by a connecting pin 62a.
[0024]
As described above, the fulcrum of the opening / closing link 84 is the top of the back side of the drive shaft 62 of the inner cylindrical portion 71a of the insulating member 71, so that the interphase distance and the ground insulation due to the arrangement of the insulating barrier 39 in the first embodiment. In addition to the effect that the distance can be shortened and the effect that the insulation distance is ensured by crimping and connecting the outside connection cable and covering the insulation cap, the movable electrode 31b of the vacuum switch tube 31 can be grounded without considering external conditions. The pressing force that presses can provide a predetermined pressing force with a small operating force, the direction of the operating force of the portion of the insulating rod 83 is the tensile direction, and the operating stroke of the open / close link 83 is long, but the small operating force Thus, a predetermined pressing force can be applied, and the operation mechanism 80 can be further reduced in weight.
[0025]
【The invention's effect】
The vacuum switch according to claim 1 of the present invention insulates and supports the fixed electrode side of the plurality of vacuum switch tubes on one side surface of the switch container via an insulating member, and the operation mechanism insulates and supports the vacuum switch tube. The operation link is attached corresponding to the position, the vacuum switch tube on the side of the switch container is rotatably supported close to the insulated support position, one end is connected to the operating device, and the intermediate position is vacuum An open / close link that rotatably supports the top of an insulating member that insulates and supports the switch tube, and that has a tip that opens and closes via a pressing spring that applies a predetermined pressing force to the contact portion of the fixed electrode and the movable electrode when the pole is closed; Since the switch is arranged in parallel and close to the vacuum switch tube, it is composed of an operation rod attached to the drive shaft and an insulating rod that connects the drive shaft side of the open / close link. Movable electrode contact area The point of action of the reaction force of the pressing force applied when applied is the position where the vacuum switch tube of the switch container and the drive shaft are supported, and the distance between them is narrow and the moment causing the deflection is small. Therefore, only the side surface on which the drive shaft is supported has a correspondingly large rigidity, so that the deflection is eliminated and the occupied volume of the operation mechanism portion is reduced. Therefore, the size of the switch container can be reduced and the weight can be easily reduced.
[0026]
The vacuum switch according to claim 2 of the present invention insulates and supports the fixed electrode side of the plurality of vacuum switch tubes on one side surface of the switch container via an insulating member, and the operation mechanism insulates and supports the vacuum switch tube. An operation link is attached corresponding to the position, and the vacuum switch tube on the side of the switch container is rotatably supported close to the position where the insulation support is provided. One end is a drive shaft connected to the operation device, and the tip is driven A pressing spring that rotatably supports the top of the insulating member that supports and insulates the vacuum switch tube on the back side where the shaft is arranged, and applies a predetermined pressing force to the contact portion of the fixed electrode and the movable electrode when the intermediate portion is closed. The opening / closing link that opens and closes via the vacuum switch tube and the insulating switch that is arranged in parallel and close to the vacuum switch tube and that connects the operation link attached to the drive shaft and the opening / closing link. Necessary to press the contact A pressing force can be given a small operating force, can be more lightweight vacuum switch is configured for further miniaturization and operating mechanism of the switch container.
[0027]
In a vacuum switch according to a third aspect of the present invention, the internal structure of the switch container according to the first or second aspect is configured such that an insulating barrier is disposed in each of the plurality of vacuum switch tubes in the switch container. Therefore, the insulation distance between the vacuum switch tubes and between the vacuum switch tube and the inside of the container and the switch container wall can be shortened, and the size of the switch container can be further reduced.
[0028]
According to a fourth aspect of the present invention, there is provided a vacuum switch according to the first or second aspect, wherein each of the outer end portions of the terminal derived from the fixed electrode and the terminal derived from the movable electrode side of the vacuum switch tube of the configuration of the first or second aspect. Since each end of the connection cable is crimped and the outer cap is covered with an insulation cap, the connection with the connection cable is compact and easy to connect, and the charging part is concealed, A vacuum switch that can be installed without considering outside air conditions such as securing an insulation distance can be configured.
[0029]
In the vacuum switch according to claim 5 of the present invention, since the insulating gas is sealed in the switch container having the structure according to claims 1 to 4 so as to be atmospheric pressure at the lowest ambient temperature, the switch A small and lightweight vacuum switch can be constructed without using a pressure vessel as the vessel.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a first embodiment.
FIG. 2 is a plan view of the first embodiment.
FIG. 3 is a cross-sectional view of a second embodiment.
FIG. 4 is a cross-sectional view of a conventional vacuum switch.
FIG. 5 is a cross-sectional view of a conventional vacuum switch as viewed from the front.
[Explanation of symbols]
31 vacuum switch tube, 32 drive shaft, 33 pressure spring, 34 inner conductor,
35 connection conductor, 36 flexible conductor, 40 vacuum switch tube support insulating seat,
41 Insulating member, 42 First terminal, 43 Connection cable,
44 insulation cap, 50 inner conductor support insulation seat, 51 insulation member,
52 second terminal, 53 connecting conductor, 54 insulating cap, 60 operation mechanism,
61 Drive shaft, 62 Operation link, 63 Insulating rod, 64 Open / close link,
65 open / close link support member, 67 drive link, 68 operation device,
70 vacuum switch tube support insulation seat, 71 insulation member, 80 operation mechanism,
83 Insulating rod, 84 Opening and closing link, 85 Opening and closing link support member.
