JP4409822B2 - Cased switch - Google Patents

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JP4409822B2
JP4409822B2 JP2002346906A JP2002346906A JP4409822B2 JP 4409822 B2 JP4409822 B2 JP 4409822B2 JP 2002346906 A JP2002346906 A JP 2002346906A JP 2002346906 A JP2002346906 A JP 2002346906A JP 4409822 B2 JP4409822 B2 JP 4409822B2
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JP2003157748A (en
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克彦 相羽
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Nippon Kouatsu Electric Co
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Nippon Kouatsu Electric Co
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Description

【0001】
【発明の属する技術分野】
本願発明は特別高圧並びに高圧配電線路の線路区分用として使用されるケース入り開閉器に関する。
【0002】
【従来の技術】
従来、図23に示すようなケース入り開閉器が知られており、そのケース入り開閉器100は、図23に示すように、所定形状例えば、箱型に形成したケース101に対し、その側面に相対して複数相のブッシング102,103を貫装し、その貫装したブッシングのケース内端に位置して固定電極と消弧室或いは消弧装置104を備え付け、取り付けた固定電極に対し可動電極を抜き差して電路の開閉が行えるようになっている。また、この場合開閉器は、トグル或いはリンク機構等の開閉機構105がケース内101aに組み込まれており、該開閉機構105の出力軸106が可動電極に連結され、さらに開閉機構105の駆動軸107がケース外の操作ハンドル109のハンドル軸108に連結されている。そして、開閉操作時にハンドル109を操作するとその操作力が開閉機構105を経て可動電極に伝達されて電路の開閉が行えるようになっている。
【0003】
【発明が解決しようとする課題】
上記従来の開閉器にあっては、固定電極、可動電極、消弧室或いは消弧装置104等の各部材と開閉機構105の各部材を、ケース内の各相の端子接続部やケース内の取付部に対し、順次組み付けていく組立方式のため、組立に手間と時間を要するほか、寸法等、精度良く組み付けるためには組立治工具を使用することになり、治工具の取付並びに取外しの時間が必要である等作業性が悪いという問題があった。
【0004】
そこで本願発明は上記技術的課題を解決して組立作業性を向上させるために提案するものである。
【0005】
【課題を解決するための手段】
前記の課題を解決するために、請求項1記載の第1の発明は、ハウジングと、該ハウジング内に設けた開閉軸と、該開閉軸に、この開閉軸と直交する方向に設けた可動電極と、前記ハウジングにおいて前記可動電極に対応するように設けた固定電極と、該固定電極に接続してハウジングの外側へ突設した電源側及び負荷側の接続端子と、ハウジングにおける前記開閉軸の軸方向の一端側に設けた開閉機構部とからなるユニット型の開閉機構付き開閉部を、
側壁を有するケース内に設けた開閉器であって、
前記開閉部の電源側及び負荷側の接続端子と向い合う側のケース側壁には、夫々の内端に端子接続部を有する電源側及び負荷側のブッシングを夫々3つ貫装し、
前記電源側及び負荷側のブッシングを設けた夫々のケースの側壁を、3つの壁面で構成し、隣接する壁面を内側方向に曲折するように配設し、夫々の壁面に電源側又は負荷側のブッシングを1個設け、
前記ケースの側壁に、開閉用操作ハンドルを軸着し、該開閉用操作ハンドルのハンドル軸と前記開閉機構部における開閉軸とを連結し、
前記開閉用操作ハンドルを設けたケースの側壁と対向するケースの側壁に、ケース内圧が急激に上昇した場合にその圧力をケース外へ放圧する安全弁を設け、
前記端子接続部と前記接続端子とを可撓導体で電気的に接続することを特徴とするものである。
【0006】
請求項2記載の第2の発明は、第1の発明において、該壁面を構成する3面の隣接する壁面間の内角を150度に設定したことを特徴とするものである。
【0008】
本発明において組み立てに際しては、別途ケース外で組み立てられたユニット型の開閉機構付き開閉部を、ケース側壁に相対して貫装した電源側及び負荷側のブッシング間に位置してケース内に収納配置し、そして、該収納配置した開閉機構付き開閉部の開閉機構部の開閉軸とハンドル軸とを機械的に連結するとともに開閉機構部をケースの側壁に固定する。更に、前記開閉機構付き開閉部の電源側及び負荷側の接続端子とケース側の端子接続部間に可撓導体を取り付ける。
【0009】
【発明の実施の形態】
図1乃至図22に示す実施例に基づいて本発明の実施の形態について説明する。
【0010】
図1乃至図22に示すケース入り開閉器1は特別高圧或いは高圧配電線路の区分用開閉器として使用される。
【0011】
図1において、2はステンレス等の金属板からなる箱型のケースであり、これには電源側の側壁2u1 ,2v1 ,2w1 と負荷側の側壁2u2 ,2v2 ,2w2 とが対向して形成されている。更に、中央に位置する側壁2v1 ,2v2 に対し、その両側に隣接する側壁2u1 ,2w1 及び2u2 ,2w2 は、夫々150度の内角で傾斜して形成されている。
【0012】
前記電源側の側壁2u1 ,2v1 ,2w1 には電源側のブッシング4u1 ,4v1 ,4w1 が貫装され、負荷側の側壁2u2 ,2v2 ,2w2 には負荷側のブッシング4u2 ,4v2 ,4w2 が貫装されている。また、中央に位置するブッシング4v1 ,4v2 をV相のブッシングとし、その一方の側部に隣接するブッシング4u1 ,4u2 をU相のブッシングとし、他方の側部に隣接するブッシング4w1 ,4w2 をW相のブッシングとしている。
【0013】
また、前記のように側壁2u1 ,2w1 及び2u2 ,2w2 が中央の側壁2v1 ,2v2 に対して傾斜していることにより、V相のブッシング4v1 ,4v2 に対して両側に配置したU相、W相のブッシングが図1のように傾斜して配置され、各相のブッシングの外部先端に設けた電線接続端子3u1 ,3v1 ,3w1 及び3u2 ,3v2 ,3w2 の相互の離間間隔が、ケース2の貫装部側に比較して大きくなっている。
【0014】
各ブッシング4u1 ,4v1 ,4w1 及び4u2 ,4v2 ,4w2 は、これに設けたフランジ6を取付ネジ7により各前記側壁部に固着してケース2に固定されている。
【0015】
5u1 ,5v1 ,5w1 及び5u2 ,5v2 ,5w2 は端子接続部で、ブッシング4u1 ,4v1 ,4w1 及び4u2 ,4v2 ,4w2 に挿通固定した中心導体(図示せず)のケース内側端に固設されている。
【0016】
8は前記中央に配置されたV相のブッシング4v1 ,4v2 の軸芯と直交する方向の一方の側壁2aに設けた保護装置の安全弁で、破裂板9、ガイド刃10、保護キャップ11、取付ネジ11aで構成され、常時は破裂板9によってケース2の放圧口2cを塞いでおり、雷等の異常電圧の侵入によりケース内部で短絡が生じ、ケース内圧が急激に上昇した場合にその圧力により破裂板9が外方へ押されてガイド刃10で破裂し、その圧力をケース外へ速やかに放圧して、ケースの爆裂を防止するようになっている。
【0017】
前記一方の側壁2aに対面する側の側壁2b部には、前記V相のブッシング4v1 ,4v2 の軸芯と直交する方向に軸芯を有する軸受穴2dが形成されているとともに軸受12が固設されており、該軸受穴2d、軸受12にハンドル軸14が回転可能に貫通して備えられている。そして、該ハンドル軸14のケース外の端には、該ハンドル軸14と直交する方向に配置された開閉用操作ハンドル13が固設され、該ハンドル軸14のケース内側の端には端面側が開口するU溝からなる連結機構14aが形成されている。
【0018】
15はユニット型の開閉機構付き開閉部で、開閉部16と開閉機構部30が同軸上で一体的に組み付けられて構成されており、ケース2に組み付ける以前においてケース外で開閉部16と開閉機構部30を予め組み付けておき、この組み付け状態でケース内2eへ取り付けるようになっている。
【0019】
この開閉部16はその外周が図10〜12及び図15に示すように円筒状のハウジング18で構成されている。該ハウジング18は、例えば透明のアクリル樹脂等の電気絶縁性を有する合成樹脂で形成され、かつ横断面において2分割された樋状の分割体18c,18dを分割可能に連結して構成されている。
【0020】
前記ハウジング18内には、その軸芯に沿って開閉軸19が配置され、かつ該開閉軸19は図15に示すように、ハウジング18の両端側区画板181 ,184 に回転可能に嵌挿支持されている。該開閉軸19は、表面にシリコン樹脂等のコート剤を塗布したパイプ状のFRP等の強化樹脂で形成されている。
【0021】
前記ハウジング18の周壁と前記開閉軸19との空間は、図15に示すように、ハウジング18の軸方向に略等間隔に設けた区画壁181 ,182 ,183 ,184 によって軸方向に3分割され、U相消弧室18u1 ,18u2 とV相消弧室18v1 ,18v2 とW相消弧室18w1 ,18w2 の3室に区割形成され、更に、前記各相の消弧室は図10に示すような、周方向(開閉軸19の回転方向)に2分割するような径方向の2枚の区画壁20,20により区画されており、U相消弧室が電源側消弧室18u1 と負荷側消弧室18u2 に区画され、V相消弧室が電源側消弧室18v1 と負荷側消弧室18v2 に区画され、W相消弧室が電源側消弧室18w1 と負荷側消弧室18w2 に区画されている。前記各区画壁181 ,182 ,183 ,184 及び20は電気絶縁性の合成樹脂で形成されている。
【0022】
前記ハウジング18の電源側外面には図1に示すように電源側絶縁端子取付台211 が固設され、負荷側外面には負荷側絶縁端子取付台212 が固設されている。
【0023】
前記電源側絶縁端子取付台211 には、U相接続端子23u1 とV相接続端子23v1 とW相接続端子23w1 がネジ22により取り付けられており、該各接続端子23u1 ,23v1 ,23w1 の内端はハウジング18を貫通して前記電源側の消弧室内に突入している。更に、負荷側絶縁端子取付台212 には、U相接続端子23u2 とV相接続端子23v2 とW相接続端子23w2 がネジ22により取り付けられており、該各接続端子23u2 ,23v2 ,23w2 の内端はハウジング18を貫通して前記負荷側の消弧室内に突入している。
【0024】
前記各接続端子23u1 ,23v1 ,23w1 及び23u2 ,23v2 ,23w3 の内端には各々クリップ形の固定電極24u1 ,24v1 ,24w1 及び24u2 ,24v2 ,24w2 (これらを総称して固定電極24ともいう)が固設されている(図10〜図12及び図15参照)。
【0025】
前記開閉軸19には図15に示すように、前記U相、V相、W相の固定電極24u1 ,24v1 ,24w1 及び24u2 ,24v2 ,24w2 に対応する3箇所の位置において、ブレート形の可動電極25が、開閉軸19と直交する方向に貫通して固定されており、開閉軸19を図10において反時計方向に回動するとその可動電極25も一体に同方向へ回動し、その可動電極25の両端の接触部25a,25bが前記電源側固定電極24u1 ,24v1 ,24w1 と、負荷側固定電極24u2 ,24v2 ,24w2 から離間して電路を開き、逆に開閉軸19を時計方向に回動すると電路を閉じるようになっている。
【0026】
前記の可動電極25の両端部には、ポリアセタール樹脂等の電気絶縁性の合成樹脂からなるノズルガイド27,27が固設されている。
【0027】
該ノズルガイド27は、図16乃至図20に示すように、その中央に支持穴27aが貫通形成されており、該支持穴27aを前記可動電極25の先端側に嵌合するとともにその接触部25a,25bの先端部を少し覗かせた状態で可動電極25にピン或いはピンと接着剤等により固設されている。
【0028】
該ノズルガイド27の両側には、電路開放時に、該ノズルガイド27が回動することにより、各消弧室18u1 ,18u2 ,18v1 ,18v2 ,18w1 ,18w2 内の可動電極より前方にあるSF6 ガス(消弧性ガス)26を可動電極25部に集めるように前方に向って拡開したガイド部27b,27bと、該ガイド部27bで集めたSF6 ガス26が可動電極25の発弧部付近において流速並びに流量を増すようにするために前記ガイド部27b,27bの後方で絞った絞り部27dと、その後方に向って僅かにラッパ状に拡開した放出部27eが一連に形成され、更に、底面27fは後方が径方向の外側へ傾斜している。すなわち、図18に示すように、電路開放時の回転前方側となるSF6 ガスの入口幅aが広く、支持穴27aの後端部、すなわち、可動電極25の発弧部付近でのSF6 ガスの通過路27cの幅gが狭く形成され、該ノズルガイド27の回動によって、前記通過路27cでのSF6 ガスの流速並びに流量が増すようになっている。
【0029】
また、前記のノズルガイド27は、図10〜12及び図15に示すように、1つ(1相)の可動電極に対し、電源側のノズルガイド27と負荷側のノズルガイド27の2つが、上下逆向きの位置関係で取り付けられている。
【0030】
更に、前記ノズルガイド27の幅aは、図15に示すように、前記ハウジング18の消弧室18u1 ,18u2 ,18v1 ,18v2 ,18w1 ,18w2 の幅bいっぱいに形成されており、電路開閉時においてノズルガイド27が回動した場合に、ガイド部27b,27bと区画壁181 〜184 との隙間からのSF6 ガスの漏れを極めて少なくし、消弧室内のSF6 ガスを圧縮して効率的に通過路27cに集中して流通させるようになっている。
【0031】
前記ハウジング18には前記各電源側の消弧室18u1 ,18v1 ,18w1 毎に、かつ、電源側固定電極24u1 ,24v1 ,24w1 の位置より可動電極25の開放側方向と反対側において、電源側流通口18aが形成されている。同様に、前記各負荷側の消弧室18u2 ,18v2 ,18w2 毎にも、負荷側固定電極24u2 ,24v2 ,24w2 の位置より可動電極25の開放側方向と反対側において、負荷側流通口18bが形成されている。
【0032】
前記開閉機構部30は、図1,図2及び図22に示すように、前記開閉部16の軸方向(長手方向)の一端部に一体的に備えられえており、図22に示すように、前記開閉部16側のハウジング18のフランジ部18dを開閉機構部30側の取付用フレーム38にネジ45により固着して備えられている。
【0033】
図22において、前記開閉軸19における開閉機構部30側の端部には連結ピン39が横断状に架設固着されている。開閉機構部30側の取付用フレーム38内には電極直結駆動レバー31が回転可能に備えられており、その筒状部31bには、内端側が開口したU状の連結溝31cが形成され、該連結溝31cに前記連結ピン39を嵌合することにより開閉軸19と電極直結駆動レバー31とが直結して両者が周方向に一体的に回転するようになっている。
【0034】
前記電極直結駆動レバー31の筒状部31bの内周側には筒状のハンドル直結駆動レバー32の一部32cが回動可能に遊嵌されており、該ハンドル直結駆動レバー32に連結ピン40が横断状に架設固着されている。該筒状のハンドル直結駆動レバー32内には前記操作ハンドル13のハンドル軸14が嵌入するようになっており、該ハンドル軸14の内端にはU状の連結溝14aが形成され、該連結溝14a内に前記連結ピン40を嵌合することにより、ハンドル軸14とハンドル直結駆動レバー32とが直結して両者が周方向に一体的に回転するようになっている。
【0035】
前記電極直結駆動レバー31には、図21及び図22に示すように、掛り止め部31aが一体形成され、前記ハンドル直結駆動レバー32には掛り止め部32aが一体形成されている。
【0036】
前記ハンドル直結駆動レバー32の筒状部32dの外周には合成樹脂製の鍔付きカラー41が嵌装され、該カラー41の外周にはコイルバネからなる蓄力バネ33が巻装され、図21に示すように、その一端33aが電極直結駆動レバー31の掛り止め部31aとハンドル直結駆動レバー32の掛り止め部32aの開放方向側端に係止し、他端33bが電極直結駆動レバー31の掛り止め部31aとハンドル直結駆動レバー32の掛り止め部32aの投入方向側端に係止するようになっており、電極直結駆動レバー31をロックして停止させた状態でハンドル直結駆動レバー32の掛り止め部32aを開放方向(矢印方向)へ回動した場合に蓄力バネ33に、その他方の掛り止め部31aを開放方向(矢印方向)へ移動させる力が蓄積され、また、電極直結駆動レバー31をロックして停止させた状態でハンドル直結駆動レバー32の掛り止め部32aを投入方向へ回動した場合に、蓄力バネ33に、その他方の掛り止め部31aを投入方向へ移動させる力が蓄積されるように設定されている。すなわち、蓄力バネ33の両端33a,33bは、両掛り止め部31a,32aに対し、回動方向の相反する側に夫々係止されてる。
【0037】
前記取付用フレーム38には図21に示すように、開放側ラッチ34と、投入側ラッチ35が夫々支軸34a,35aにより回動可能に備えられており、夫々係合部34b,35bが常時内側へ付勢されている。
【0038】
前記電極直結駆動レバー31には一方の係止部31bが形成され、図21(a)に示すように、該係止部31bに開放側ラッチ34が係止すると該電極直結駆動レバー31の開放方向への回動がロックされるようになっている。更に、該電極直結駆動レバー31には他方の係止部31eが形成され、図21(d)に示すように、該係止部31eに投入側ラッチ35が係止すると該電極直結駆動レバー31の投入方向への回動がロックされるようになっている。
【0039】
前記ハンドル直結駆動レバー32には、傾斜状に形成された開放側押圧部32dと投入側押圧部32fが、夫々電極直結駆動レバー31の外周面より径方向に突出するように形成されており、ハンドル直結駆動レバー32が図21(c)に示すように開放終了近くまで回動するとその開放側押圧部32dが開放側ラッチ34を一方の係止部31bから外し、また、ハンドル直結駆動レバー32が図1(a)に示すように投入終了近くまで回動すると、その投入側押圧部32fが投入側ラッチ35を他方の係止部31eから外すようになっている。
【0040】
図2,図3,図22において、42は支持フレームで、前記ハンドル直結駆動レバー32の筒状部32dの端部32eを回転自在に支持するとともに、鍔付カラー41が脱落しないようにするもので、取付用フレーム38にネジにより固着されている。図22において、43は両レバー31,32間に介在した軸受メタル、44は電極直結駆動レバー31と取付用フレーム38間に介在した軸受メタルを示す。
【0041】
前記開閉用の操作ハンドル13のハンドル軸14は図3に示すように、ケース2の側面2bに対してメタル56を介して貫通し、ケース2に固着された軸受12に対してOリング55及びメタル56を介して貫通し、ケースに対し気密的に貫通している。該ハンドル軸14は、ケース2に対し挿通した後、その外周に平ワッシャ或いは鍔付カラー46を嵌挿して抜け止めされている。更に、該鍔付きカラー46とハンドル軸14はノックピン或いは割りピン等のピン47で止着されている。
【0042】
図1において、前記電源側ブッシング4u1 ,4v1 ,4w2 の各相の端子接続部5u1 ,5v1 ,5w1 と前記開閉部16の電源側の接続端子23u1 ,23v1 ,23w1 間は可撓導体50u1 50v1 ,50w1 で電気的に接続されている。
【0043】
また、同様に負荷側ブッシング4u2 ,4v2 ,4w2 の各相の端子接続部5u2 ,5v2 ,5w2 と前記開閉部16の負荷側の接続端子23u2 ,23v2 ,23w2 間は可撓導体50u2 ,50v2 ,50w2 で電気的に接続されている。
【0044】
前記可撓導体50u1 ,50v2 ,50w2 ,50u2 ,50v2 ,50w2 は図4及び図5に示すようにボルト52及びナット53で電気的に接続されている。更に、該可撓導体としては、図6に示すように、両端に取付穴50aを形成した薄板状の導電板を所定の通電容量が確保できるように複数枚重ねたものや、平編線や細線からなる撚線等を使用したり、更にはなまし銅板を用いることができる。更に、図7に示すように両端に長穴或いはバカ穴54a等のような前記ボルト52が遊嵌する取付位置が調整可能な取付穴54aを形成したものでもよい。図7に示すものは、このような接続調節可能な取付穴54aを形成したなまし銅板からなる導電板54を示す。
【0045】
次に組立方法について説明する。
【0046】
先ず図8及び図9に示す蓋51を外し、この状態において、ハンドル軸14をケース2の側面2bの軸受12に挿通し、そのケース内側で平ワッシャやカラー46及びピン47で抜け止めし、操作ハンドル13をケース2に回転可能に組み付ける。
【0047】
また、電源側並びに負荷側の両側壁2u1 ,2v1 ,2w1 と2u2 ,2v2 ,2w2 に対し、U,V,Wの各相のブッシング4u1 ,4v1 ,4w1 と4u2 ,4v2 ,4w2 を貫装し、取付ネジ7で組み付ける。
【0048】
次にケース2外で別に組み付けて予め用意したユニット型の開閉機構付き開閉部15を、その開閉機構部30が開閉用操作ハンドル13側に向くようにし、かつ前記電源側並びに負荷側の各ブッシングの内端の端子接続部5u1 ,5v1 ,5w1 及び5u2 ,5v2 ,5w2 間に配置して、開閉機構部30の取付用フレーム38をケース2の側壁2bに当てる。このとき、ハンドル直結駆動レバー32に一体的に設けた連結ピン40をハンドル軸14の連結溝14aに嵌合し、ハンドル直結駆動レバー32とハンドル軸14とを回転方向に一体的に連結させる。これにより、ハンドル軸14と開閉軸19とが一体的に回転するように、開閉機構部30を介して機械的に連結される。
【0049】
そして、開閉機構部30側の取付用フレーム38を、その取付穴38bをケース2の内側面に突設したボルト47に挿入してネジ37によりケース2の側面2bに固定する。
【0050】
次で、ケース2に固定した各相のブッシングにおける端子接続部5u1 ,5v1 ,5w1 及び5u2 ,5v2 ,5w2 と前記のようにケース2内に固定した開閉機構付き開閉部15の各相の接続端子23u1 ,23v1 ,23w1 及び23u2 ,23v2 ,23w2 との間を可撓導体50u1 ,50v1 ,50w1 及び50u2 ,50v2 ,50w2 で、ボルト52及びナット53によって電気的に接続する。
【0051】
次で、蓋51を被着し、ケース2内を真空引きした後、消弧性ガスのSF6 ガス26を所定量或いは所定圧力に達するまでケース2内に充填し、吸着剤をセットし、ケース2を気密処理して組み付けを完了する。この組付完了状態の外観を図8及び図9に示す。
【0052】
次に図21により開閉機構部の動作について説明する。
【0053】
図21(a)は開閉器の投入(閉路)状態を示す。
【0054】
この図21(a)の状態から、開閉用操作ハンドル13を開放操作してハンドル直結駆動レバー32を反時計方向に回動すると、そのハンドル直結駆動レバー32の掛り止め部32aが蓄力バネ33の一端33aを図の反時計方向に押し回動する。このとき、電極直結駆動レバー31は開放側ラッチ34により反時計方向への回動が阻止されてロックされているため、蓄力バネ33の他端33bは電極直結駆動レバー31の掛り止め部31aに係止して動かない。そのため、蓄力バネ33は巻き締めされて蓄力される。
【0055】
そして、更にハンドル直結駆動レバー32が反時計方向に回動してその開放側押圧部32dが図21(c)に示すように開放側ラッチ34の係合部34bに達すると、該係合部34bは開放側押圧部32dにより外側へ押し移動されて係止部31bから外側へ外れ、電極直結駆動レバー31のロックが解除される。このようにロックが解除されると、蓄力バネ33に蓄力されたバネ力により電極直結駆動レバー31が一挙に図の反時計方向に回動する。このように回動すると、該レバー31に直結した開閉軸19も一挙に開放方向に回動し、図10の投入状態から可動電極25が固定電極24より離間し、図11の状態を経て図12の開放状態になり、電路が開放する。
【0056】
このように開放が完了すると、図21(d)に示すように、電極直結駆動レバー31は、その一方へ係止部31bがストッパー36に係止されて過度の回動が阻止され、また、他方の係止部31eに投入側ラッチ35が係止してロックされる。
【0057】
なお、図21の(a)は投入状態、(b)は蓄力動作中、(c)は開放動作中、(d)は開放状態を示す。
【0058】
次に前記の開放(開路)状態から投入(閉路)する場合について説明する。
【0059】
図21(d)の開放状態で、操作ハンドル13を前記とは逆の投入方向へ回動して投入操作する。この投入(閉路)操作により、ハンドル軸14と直結するハンドル直結駆動レバー32が前記開放時とは逆に時計方向に回動する。この回動により、ハンドル直結駆動レバー32の掛り止め部32aが蓄力バネ33の他端33bを図の時計方向へ押し回動する。このとき、電極直結駆動レバー31は投入側ラッチ35により時計方向への回動が阻止されてロックされているため、蓄力バネ33の一端33aは電極直結駆動レバー31の掛り止め部31aに係止されて動かない。そのため、蓄力バネ33には巻き締めされて蓄力される。
【0060】
そして、更に、ハンドル直結駆動レバー32が時計方向に回動してその投入側押圧部32fが投入側ラッチ35の係合部35bに達すると、該係合部35bは投入側押圧部32fにより外側へ押し移動されて係止部31eから外側へ外れ、電極直結駆動レバー31のロックが解除される。このようにロックが解除されると、蓄力バネ33に蓄力されたバネ力により電極直結駆動レバー31が一挙に図の時計方向に回動する。このように回動すると、該レバー31に直結した開閉軸19も一挙に投入方向に回動し、図12の開放状態から可動電極25が一挙に図11を経て図10に示すように固定電極24に投入され、電路が閉路される。
【0061】
このように投入が完了すると、図21(a)に示すように、電極直結駆動レバー31は、その他方の係止部31eがストッパー36に係止されて過度の回動が阻止され、また、一方の係止部31bに開放側ラッチ34が係止されてロックされる。
【0062】
次に、前記の開閉時における消弧動作について説明する。
【0063】
開閉操作ハンドル13を投入状態から前記のように開放操作して可動電極25を図10の投入状態から矢印方向へ回動して固定電極24から一挙に離間させて電路を開放すると、その可動電極25の固定電極24からの離間時に、これら両電極24,25との間でアーク放電が起こる。
【0064】
このとき、電源側及び負荷側の各消弧室18u1 ,18v1 ,18w1 及び18u2 ,18v2 ,18w2 内のSF6 ガス26は、可動電極25とともに回動するノズルガイド27における前方に向ってラッパ状に拡開したガイド部27bにより圧縮されながら集められ、更に絞り部27dにより絞られた通過路27cにおいてそのSF6 ガス26の流速及び流量を増し、この流速及び流量を増したガス流が可動電極25の発弧部25c付近で発生したアークに一挙に吹き付けられ、そのアークを吹き消し、その後、後方に緩やかにラッパ状に拡開した放出部27eから放出されて消弧する。アークを吹き消したSF6 ガスは、その後流通口18a,18bよりハウジング18外(ケース2内)へ排出される。
【0065】
また、前記の図12の開放状態から開閉操作ハンドル13を前記のように投入操作して可動電極25を図12から時計方向に一挙に回動して投入すると、電源側及び負荷側の各消弧室18u1 ,18v1 ,18w1 及び18u2 ,18v2 ,18w2 内は、可動電極25の急速な時計方向回動によって擬似真空(減圧)状態になり、ケース2内のSF6 ガス26は流通口18a,18bから各消弧室に入り、かつ、ノズルガイド27を経て両電極24,25間で発生するアークに吹き付けられ、該アークが消弧される。なお、この投入(閉路)時、両電極24,25間で先行放電が発生するが、可動電極25は固定電極24に直ぐに投入されるため、この先行放電の時間が極めて短くなり、ほとんど影響を受けることはなく、可動電極25は固定電極24に投入される。
【0066】
【発明の効果】
以上のようであるから、本発明によれば、可動電極、固定電極、開閉機構部等を予め一体的に構成してなるユニット型の開閉機構付き開閉部をケース内にセットするのみで、これらの部材を1度にケース内に配置できるため、前記従来のようにケース内において固定電極、可動電極、開閉機構部等を個々に順次組み付けていくものに比べて、組付作業が極めて容易になる。
【図面の簡単な説明】
【図1】本願発明の実施例を示すもので、蓋を被着する前のケース入り開閉器の組立状態を示す平面図。
【図2】図1におけるユニット型の開閉機構付き開閉部を示すもので、(a)は平面図、(b)は(a)での底面図。
【図3】開閉用操作ハンドルと開閉機構部の連結状態を示す一部断面図。
【図4】可撓導体の接続状態を示す平面図。
【図5】同じく接続状態を示す側面図。
【図6】可撓導体の斜視図。
【図7】可撓導体の他の例である導電板の斜視図。
【図8】組立完了状態のケース入り開閉器のハンドル側から見た側面図。
【図9】同じくブッシング側から見た側面図。
【図10】消弧動作を説明するためのもので、U相の投入(閉路)状態を示す断面図。
【図11】同じくU相の開放途中状態を示す断面図。
【図12】同じくU相の開放(開路)状態を示す断面図。
【図13】可動電極の正面図。
【図14】開閉軸とノズルガイドと可動電極とを組み付けした状態を示す平面図。
【図15】開閉部の組立状態を示す平断面図。
【図16】ノズルガイドの斜視図。
【図17】同じくノズルガイドの正面図。
【図18】同じく平面図。
【図19】同じく側面図。
【図20】可動電極に取り付けた状態のノズルガイドの斜視図。
【図21】開閉機構の動作を説明するための概略構造図であり、(a)は投入状態、(b)は蓄力状態、(c)は開放動作中、(d)は開放状態を各々示す。
【図22】開閉機構の概略を示す断面図。
【図23】従来のケース入り開閉器の概略構造図。
【符号の説明】
2 ケース
2a,2b 側壁
23u1 ,23v1 ,23w1 開閉部の電源側の接続端子
23u2 ,23v2 ,23w2 開閉部の負荷側の接続端子
4u1 ,4v1 ,4w1 電源側のブッシング
4u2 ,4v2 ,4w2 負荷側のブッシング
5u1 ,5v1 ,5w1 電源側のブッシングの端子接続部
5u2 ,5v2 ,5w2 負荷側のブッシングの端子接続部
13 開閉用操作ハンドル
14 ハンドル軸
15 開閉機構付き開閉部
16 開閉部
18 ハウジング
19 開閉軸
24 固定電極
25 可動電極
30 開閉機構部
50 可撓導体
50u1 ,50v1 ,50w1 可撓導体
50u2 ,50v2 ,50w2 可撓導体
54 導電板
50a,54a 取付穴
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cased switch used for line division of extra high voltage and high voltage distribution lines.
[0002]
[Prior art]
Conventionally, a cased switch as shown in FIG. 23 is known, and the cased switch 100 has a predetermined shape, for example, a box-shaped case 101 as shown in FIG. A plurality of bushings 102 and 103 are opposed to each other, and a fixed electrode and an arc extinguishing chamber or arc extinguishing device 104 are provided at the inner end of the case of the penetrated bushing. The electric circuit can be opened and closed by plugging and unplugging. Further, in this case, the switch has an opening / closing mechanism 105 such as a toggle or link mechanism incorporated in the case 101 a, the output shaft 106 of the opening / closing mechanism 105 is connected to the movable electrode, and the drive shaft 107 of the opening / closing mechanism 105. Is connected to the handle shaft 108 of the operation handle 109 outside the case. When the handle 109 is operated during the opening / closing operation, the operating force is transmitted to the movable electrode via the opening / closing mechanism 105 so that the electric circuit can be opened / closed.
[0003]
[Problems to be solved by the invention]
In the conventional switch, the members such as the fixed electrode, the movable electrode, the arc extinguishing chamber, or the arc extinguishing device 104 and the members of the switching mechanism 105 are connected to the terminal connection portions of the respective phases in the case or in the case. Since the assembly method is to sequentially assemble to the mounting part, it takes time and labor to assemble, and assembly tools will be used to assemble with precision such as dimensions. However, there was a problem that workability was bad.
[0004]
Accordingly, the present invention proposes to solve the above technical problem and improve the assembly workability.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problem, a first invention according to claim 1 is a housing, an opening / closing shaft provided in the housing, and a movable electrode provided on the opening / closing shaft in a direction orthogonal to the opening / closing shaft. A fixed electrode provided in the housing so as to correspond to the movable electrode, a power supply side load terminal connected to the fixed electrode and projecting to the outside of the housing, and an axis of the opening / closing shaft in the housing A unit-type opening / closing mechanism with an opening / closing mechanism comprising an opening / closing mechanism provided on one end of the direction,
A switch provided in a case having a side wall,
Three side bushings on the power supply side and the load side having terminal connection portions at the inner ends thereof are inserted in the case sidewalls on the side facing the connection terminals on the power supply side and the load side of the opening and closing unit, respectively.
The side walls of each case provided with the power supply side and load side bushings are constituted by three wall surfaces, and the adjacent wall surfaces are arranged so as to bend inwardly. One bushing,
An opening / closing operation handle is pivotally attached to the side wall of the case, and the handle shaft of the opening / closing operation handle is connected to the opening / closing shaft of the opening / closing mechanism section,
Provided on the side wall of the case facing the side wall of the case provided with the opening / closing operation handle is a safety valve that releases the pressure outside the case when the internal pressure of the case suddenly increases,
The terminal connection portion and the connection terminal are electrically connected by a flexible conductor .
[0006]
A second invention according to claim 2 is characterized in that, in the first invention, an internal angle between three adjacent wall surfaces constituting the wall surface is set to 150 degrees.
[0008]
When assembling in the present invention, a unit-type opening / closing part with an opening / closing mechanism separately assembled outside the case is positioned between the power supply side and load side bushings penetrating relative to the case side wall and placed in the case The opening / closing shaft of the opening / closing mechanism portion of the opening / closing portion with the opening / closing mechanism accommodated is mechanically coupled to the handle shaft, and the opening / closing mechanism portion is fixed to the side wall of the case. Furthermore, a flexible conductor is attached between the connection terminal on the power supply side and load side of the opening / closing part with the opening / closing mechanism and the terminal connection part on the case side.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described based on the examples shown in FIGS.
[0010]
The cased switch 1 shown in FIGS. 1 to 22 is used as a switch for classifying an extra high voltage or high voltage distribution line.
[0011]
In FIG. 1, reference numeral 2 denotes a box-shaped case made of a metal plate such as stainless steel, which includes power supply side walls 2u 1 , 2v 1 , 2w 1 and load side walls 2u 2 , 2v 2 , 2w 2. They are formed to face each other. Further, the side walls 2u 1 , 2w 1 and 2u 2 , 2w 2 adjacent to both sides of the side walls 2v 1 , 2v 2 located at the center are formed so as to be inclined at an inner angle of 150 degrees.
[0012]
Power supply side bushings 4u 1 , 4v 1 , 4w 1 are inserted in the power supply side walls 2u 1 , 2v 1 , 2w 1 , and load side wall 2u 2 , 2v 2 , 2w 2 are loaded on the load side bushings. 4u 2 , 4v 2 , 4w 2 are penetrated. Further, the bushings 4v 1 and 4v 2 located in the center are V-phase bushings, the bushings 4u 1 and 4u 2 adjacent to one side thereof are U-phase bushings, and the bushing 4w 1 adjacent to the other side portion. , has a 4w 2 and the bushing of the W-phase.
[0013]
Further, as described above, the side walls 2u 1 , 2w 1 and 2u 2 , 2w 2 are inclined with respect to the central side walls 2v 1 , 2v 2 , so that both sides of the V-phase bushings 4v 1 , 4v 2 are provided. The U-phase and W-phase bushings arranged at the inclination are arranged as shown in FIG. 1, and the wire connection terminals 3u 1 , 3v 1 , 3w 1, 3u 2 , 3v 2 , The spacing distance between 3w 2 is larger than that of the case 2 on the side of the penetration portion.
[0014]
Each bushing 4u 1 , 4v 1 , 4w 1, 4u 2 , 4v 2 , 4w 2 is fixed to the case 2 by fixing the flange 6 provided thereto to the side wall portion by means of a mounting screw 7.
[0015]
Reference numerals 5u 1 , 5v 1 , 5w 1 and 5u 2 , 5v 2 , 5w 2 are terminal connection parts, and are center conductors (not shown) inserted and fixed to the bushings 4u 1 , 4v 1 , 4w 1 and 4u 2 , 4v 2 , 4w 2. )) Is fixed to the inner edge of the case.
[0016]
8 is a safety valve of a protective device provided on one side wall 2a in a direction perpendicular to the axis of the V-phase bushings 4v 1 and 4v 2 disposed at the center, and includes a rupturable plate 9, a guide blade 10, a protective cap 11, It consists of a mounting screw 11a, which normally closes the pressure release port 2c of the case 2 with the rupturable plate 9. If a short circuit occurs inside the case due to the intrusion of abnormal voltage such as lightning, the case internal pressure suddenly rises. The rupture plate 9 is pushed outward by the pressure and is ruptured by the guide blade 10, and the pressure is quickly released out of the case to prevent the case from exploding.
[0017]
A bearing hole 2d having an axis in the direction perpendicular to the axis of the V-phase bushings 4v 1 and 4v 2 is formed in the side wall 2b portion facing the one side wall 2a, and the bearing 12 A handle shaft 14 is rotatably provided through the bearing hole 2d and the bearing 12. An opening / closing operation handle 13 disposed in a direction orthogonal to the handle shaft 14 is fixed to the end of the handle shaft 14 outside the case, and the end surface side of the handle shaft 14 is open at the end on the inner side of the case. A connecting mechanism 14a made of a U-groove is formed.
[0018]
Reference numeral 15 denotes a unit-type opening / closing unit with an opening / closing mechanism, and the opening / closing unit 16 and the opening / closing mechanism unit 30 are integrally assembled on the same axis, and before the case 2 is assembled, the opening / closing unit 16 and the opening / closing mechanism outside the case The part 30 is assembled in advance and attached to the case 2e in this assembled state.
[0019]
As shown in FIGS. 10 to 12 and FIG. 15, the opening / closing portion 16 is constituted by a cylindrical housing 18. The housing 18 is made of, for example, a synthetic resin having an electrical insulation property such as a transparent acrylic resin, and is formed by connecting hook-shaped divided bodies 18c and 18d that are divided in two in a cross section so as to be divided. .
[0020]
An opening / closing shaft 19 is disposed along the axis of the housing 18, and the opening / closing shaft 19 is rotatably fitted to the partition plates 18 1 and 18 4 at both ends of the housing 18 as shown in FIG. Insertion is supported. The opening / closing shaft 19 is formed of a reinforced resin such as a pipe-shaped FRP having a surface coated with a coating agent such as silicon resin.
[0021]
As shown in FIG. 15, the space between the peripheral wall of the housing 18 and the opening / closing shaft 19 is axially defined by partition walls 18 1 , 18 2 , 18 3 , and 18 4 provided at substantially equal intervals in the axial direction of the housing 18. Divided into three chambers, U-phase arc-extinguishing chambers 18u 1 and 18u 2 , V-phase arc-extinguishing chambers 18v 1 and 18v 2, and W-phase arc-extinguishing chambers 18w 1 and 18w 2 , The phase arc-extinguishing chamber is partitioned by two partition walls 20 and 20 in the radial direction that are divided into two in the circumferential direction (rotational direction of the opening and closing shaft 19) as shown in FIG. chamber is partitioned from the supply-side arc extinguishing chamber 18 u 1 to the load side arc extinguishing chamber 18 u 2, V-phase arcing chamber is partitioned from the supply-side arc extinguishing chamber 18v 1 to the load side arc extinguishing chamber 18v 2, W-phase extinguishing chamber is partitioned from the supply-side arc extinguishing chamber 18w 1 to the load side arc extinguishing chamber 18w 2. Each of the partition walls 18 1 , 18 2 , 18 3 , 18 4 and 20 is made of an electrically insulating synthetic resin.
[0022]
As shown in FIG. 1, a power supply side insulated terminal mounting base 21 1 is fixed on the power supply side outer surface of the housing 18, and a load side insulating terminal mounting base 21 2 is fixed on the load side outer surface.
[0023]
Wherein the power source side insulating terminal mounting base 21 1, U-phase connection terminal 23u 1 and V-phase connection terminal 23v 1 and W-phase connection terminal 23w 1 is attached by screws 22, each of said connecting terminals 23u 1, 23v 1 , 23w 1 penetrates the housing 18 and enters the arc extinguishing chamber on the power source side. Further, a U-phase connection terminal 23u 2 , a V-phase connection terminal 23v 2 and a W-phase connection terminal 23w 2 are attached to the load-side insulated terminal mounting base 21 2 with screws 22, and the connection terminals 23u 2 and 23v are connected to each other. The inner ends of 2 and 23w 2 penetrate the housing 18 and enter the arc extinguishing chamber on the load side.
[0024]
At the inner ends of the connection terminals 23u 1 , 23v 1 , 23w 1 and 23u 2 , 23v 2 , 23w 3 , clip-shaped fixed electrodes 24u 1 , 24v 1 , 24w 1 and 24u 2 , 24v 2 , 24w 2 ( These are collectively referred to as a fixed electrode 24) (see FIGS. 10 to 12 and 15).
[0025]
As shown in FIG. 15, the opening / closing shaft 19 has three positions corresponding to the U-phase, V-phase, and W-phase fixed electrodes 24u 1 , 24v 1 , 24w 1 and 24u 2 , 24v 2 , 24w 2 . The blade-shaped movable electrode 25 is fixed so as to pass through in a direction orthogonal to the opening / closing shaft 19, and when the opening / closing shaft 19 is rotated counterclockwise in FIG. 10, the movable electrode 25 also rotates integrally in the same direction. The contact portions 25a and 25b at both ends of the movable electrode 25 are separated from the power supply side fixed electrodes 24u 1 , 24v 1 and 24w 1 and the load side fixed electrodes 24u 2 , 24v 2 and 24w 2 to open the electric circuit. On the contrary, when the opening / closing shaft 19 is rotated clockwise, the electric circuit is closed.
[0026]
At both ends of the movable electrode 25, nozzle guides 27, 27 made of an electrically insulating synthetic resin such as polyacetal resin are fixed.
[0027]
As shown in FIGS. 16 to 20, the nozzle guide 27 has a support hole 27a formed through the center thereof, and the support hole 27a is fitted to the distal end side of the movable electrode 25 and the contact portion 25a. , 25b is fixed to the movable electrode 25 with a pin or a pin and an adhesive or the like with a little peeking at the tip.
[0028]
On both sides of the nozzle guide 27, when the electric circuit is opened, the nozzle guide 27 is rotated to move from the movable electrodes in the arc extinguishing chambers 18u 1 , 18u 2 , 18v 1 , 18v 2 , 18w 1 , 18w 2 . Guide portions 27b and 27b spread forward to collect the front SF 6 gas (arc-extinguishing gas) 26 at the movable electrode 25 portion, and the SF 6 gas 26 collected at the guide portion 27b is the movable electrode. In order to increase the flow velocity and flow rate in the vicinity of the 25 arcing portions, a throttle portion 27d that is throttled behind the guide portions 27b and 27b, and a discharge portion 27e that is slightly expanded in a trumpet shape toward the rear. Further, the bottom surface 27f is inclined rearward in the radial direction. That is, as shown in FIG. 18, the SF 6 gas inlet width a on the rotation front side when the electric circuit is opened is wide, and SF 6 near the rear end of the support hole 27a, that is, near the arcing portion of the movable electrode 25, is shown. The gas passage 27c has a narrow width g, and the rotation of the nozzle guide 27 increases the flow rate and flow rate of the SF 6 gas in the passage 27c.
[0029]
Further, as shown in FIGS. 10 to 12 and 15, the nozzle guide 27 has two (one-phase) movable electrodes, that is, a power source side nozzle guide 27 and a load side nozzle guide 27. It is attached in a positional relationship that is upside down.
[0030]
Furthermore, the width a of the nozzle guide 27 is formed to fill the width b of the arc extinguishing chambers 18u 1 , 18u 2 , 18v 1 , 18v 2 , 18w 1 , 18w 2 of the housing 18 as shown in FIG. When the nozzle guide 27 is rotated when the electric circuit is opened and closed, SF 6 gas leakage from the gap between the guide portions 27b and 27b and the partition walls 18 1 to 18 4 is extremely reduced, and SF 6 in the arc extinguishing chamber is reduced. The gas is compressed and efficiently concentrated and circulated in the passage 27c.
[0031]
Opposite the arcing chamber 18 u 1, to 18v 1, 18w each of the power supply side to the housing 18, and the open side direction of the power supply side stationary electrode 24u 1, 24v 1, the movable electrode 25 from the position of 24w 1 On the side, a power supply side circulation port 18a is formed. Similarly, for each arc-extinguishing chamber 18u 2 , 18v 2 , 18w 2 on each load side, on the side opposite to the open side direction of the movable electrode 25 from the position of the load side fixed electrodes 24u 2 , 24v 2 , 24w 2 , A load side circulation port 18b is formed.
[0032]
The opening / closing mechanism 30 is integrally provided at one end of the opening / closing portion 16 in the axial direction (longitudinal direction) as shown in FIGS. 1, 2 and 22, and as shown in FIG. A flange portion 18 d of the housing 18 on the opening / closing portion 16 side is fixed to a mounting frame 38 on the opening / closing mechanism portion 30 side by screws 45.
[0033]
In FIG. 22, a connecting pin 39 is fixed in a transverse manner on the end of the opening / closing shaft 19 on the opening / closing mechanism 30 side. An electrode direct drive lever 31 is rotatably provided in the mounting frame 38 on the opening / closing mechanism 30 side, and a U-shaped connecting groove 31c having an inner end opened is formed in the cylindrical portion 31b. By fitting the connection pin 39 into the connection groove 31c, the opening / closing shaft 19 and the electrode direct connection drive lever 31 are directly connected, and both rotate integrally in the circumferential direction.
[0034]
A part 32c of a cylindrical handle direct drive lever 32 is rotatably fitted on the inner peripheral side of the cylindrical portion 31b of the electrode direct drive lever 31 and a connecting pin 40 is connected to the handle direct drive lever 32. Is fixed in a transverse manner. The handle shaft 14 of the operation handle 13 is fitted into the cylindrical handle direct connection drive lever 32, and a U-shaped connection groove 14a is formed at the inner end of the handle shaft 14, and the connection By fitting the connecting pin 40 in the groove 14a, the handle shaft 14 and the handle direct drive lever 32 are directly connected, and both rotate integrally in the circumferential direction.
[0035]
As shown in FIGS. 21 and 22, the electrode direct drive lever 31 is integrally formed with a latching portion 31a, and the handle direct coupling drive lever 32 is integrally formed with a latching portion 32a.
[0036]
A collar 41 made of synthetic resin is fitted on the outer periphery of the cylindrical portion 32d of the handle direct connection drive lever 32, and an accumulating spring 33 made of a coil spring is wound around the outer periphery of the collar 41, as shown in FIG. As shown, one end 33a is engaged with the opening direction side end of the latching portion 31a of the electrode direct coupling drive lever 31 and the latching portion 32a of the handle direct coupling drive lever 32, and the other end 33b is latched with the electrode direct coupling drive lever 31. The stopper 31a and the handle direct connection drive lever 32 are locked to the end of the latching portion 32a in the closing direction. The electrode direct connection drive lever 31 is locked and stopped while the handle direct connection drive lever 32 is engaged. When the stopper 32a is rotated in the opening direction (arrow direction), the force that moves the other latching stopper 31a in the opening direction (arrow direction) is accumulated in the accumulator spring 33, Further, when the latching portion 32a of the handle direct coupling drive lever 32 is rotated in the closing direction with the electrode direct coupling drive lever 31 locked and stopped, the other latching portion 31a is connected to the accumulator spring 33. The force for moving in the charging direction is set to be accumulated. That is, both ends 33a and 33b of the accumulator spring 33 are respectively locked to opposite sides of the rotation direction with respect to the both latching portions 31a and 32a.
[0037]
As shown in FIG. 21, the mounting frame 38 is provided with an open side latch 34 and a closing side latch 35 so as to be rotatable by support shafts 34a and 35a, respectively, and engaging portions 34b and 35b are always provided. It is biased inward.
[0038]
The electrode direct drive lever 31 is formed with one locking portion 31b. As shown in FIG. 21A, when the open side latch 34 is locked to the locking portion 31b, the electrode direct drive lever 31 is opened. Rotation in the direction is locked. Further, the other directly engaging drive lever 31 is formed with the other engaging portion 31e. As shown in FIG. 21D, when the closing latch 35 is engaged with the engaging portion 31e, the directly connecting drive lever 31 is provided. The rotation in the charging direction is locked.
[0039]
The handle direct connection drive lever 32 is formed with an opening-side pressing portion 32d and an insertion-side pressing portion 32f formed in an inclined shape so as to protrude in the radial direction from the outer peripheral surface of the electrode direct connection drive lever 31, respectively. When the handle direct drive lever 32 rotates to near the end of opening as shown in FIG. 21 (c), the open side pressing portion 32 d removes the open side latch 34 from one of the locking portions 31 b, and the handle direct connection drive lever 32. As shown in FIG. 1 (a), when it is rotated to near the end of charging, the charging side pressing portion 32f removes the charging side latch 35 from the other locking portion 31e.
[0040]
2, 3, and 22, reference numeral 42 denotes a support frame that rotatably supports the end portion 32 e of the cylindrical portion 32 d of the handle direct drive drive lever 32 and prevents the collar 41 from falling off. Thus, it is fixed to the mounting frame 38 with screws. In FIG. 22, reference numeral 43 denotes a bearing metal interposed between the levers 31 and 32, and 44 denotes a bearing metal interposed between the electrode direct drive lever 31 and the mounting frame 38.
[0041]
As shown in FIG. 3, the handle shaft 14 of the opening / closing operation handle 13 penetrates the side surface 2 b of the case 2 through a metal 56, and an O-ring 55 and a bearing 12 fixed to the case 2. It penetrates through the metal 56 and penetrates the case in an airtight manner. After the handle shaft 14 is inserted into the case 2, a flat washer or a flanged collar 46 is fitted on the outer periphery thereof to prevent the handle shaft 14 from coming off. Further, the collar 46 with the hook and the handle shaft 14 are fixed by a pin 47 such as a knock pin or a split pin.
[0042]
In Figure 1, the power supply-side bushing 4u 1, 4v 1, the terminal connection portions of each phase of 4w 2 5u 1, 5 v 1, 5w 1 and the connection terminal 23u 1 of the power source side of the switching unit 16, 23v 1, 23w 1 during it is electrically connected by flexible conductors 50u 1 50v 1, 50w 1.
[0043]
Similarly, between the terminal connection portions 5u 2 , 5v 2 , 5w 2 of each phase of the load side bushings 4u 2 , 4v 2 , 4w 2 and the load side connection terminals 23u 2 , 23v 2 , 23w 2 of the opening / closing portion 16. It is electrically connected by flexible conductors 50u 2, 50v 2, 50w 2 .
[0044]
It said flexible conductor 50u 1, 50v 2, 50w 2 , 50u 2, 50v 2, 50w 2 are electrically connected by bolts 52 and nuts 53 as shown in FIGS. 4 and 5. Furthermore, as the flexible conductor, as shown in FIG. 6, a plurality of thin plate-like conductive plates with mounting holes 50a formed at both ends are stacked so as to ensure a predetermined energization capacity, A twisted wire made of a fine wire or the like, or an annealed copper plate can be used. Further, as shown in FIG. 7, mounting holes 54 a that can adjust the mounting position where the bolt 52 is loosely fitted, such as a long hole or a fool hole 54 a, may be formed at both ends. FIG. 7 shows a conductive plate 54 made of an annealed copper plate in which such a connection adjustable mounting hole 54a is formed.
[0045]
Next, the assembly method will be described.
[0046]
First, the cover 51 shown in FIGS. 8 and 9 is removed, and in this state, the handle shaft 14 is inserted into the bearing 12 on the side surface 2b of the case 2, and the flat washer, the collar 46, and the pin 47 are used to prevent the handle shaft 14 from coming off. The operation handle 13 is assembled to the case 2 so as to be rotatable.
[0047]
Further, the bushings 4u 1 , 4v 1 , 4w 1 and 4u of each phase of U, V, and W with respect to both side walls 2u 1 , 2v 1 , 2w 1 and 2u 2 , 2v 2 , 2w 2 on the power source side and the load side. 2 , 4 v 2 , 4 w 2 are inserted and assembled with mounting screws 7.
[0048]
Next, a unit-type opening / closing part 15 with an opening / closing mechanism separately assembled outside the case 2 is arranged so that the opening / closing mechanism part 30 faces the opening / closing operation handle 13 side, and each bushing on the power supply side and load side is provided. Are arranged between the terminal connection portions 5u 1 , 5v 1 , 5w 1 and 5u 2 , 5v 2 , 5w 2 at the inner ends of the inner and outer surfaces of the case 2 and the mounting frame 38 of the opening / closing mechanism 30 is applied to the side wall 2b of the case 2. At this time, the connection pin 40 provided integrally with the handle direct connection drive lever 32 is fitted into the connection groove 14a of the handle shaft 14, and the handle direct connection drive lever 32 and the handle shaft 14 are integrally connected in the rotation direction. Thereby, the handle shaft 14 and the opening / closing shaft 19 are mechanically coupled via the opening / closing mechanism 30 so as to rotate integrally.
[0049]
Then, the mounting frame 38 on the opening / closing mechanism 30 side is inserted into a bolt 47 with its mounting hole 38 b protruding from the inner side surface of the case 2, and fixed to the side surface 2 b of the case 2 with a screw 37.
[0050]
Next, the terminal connecting portions 5u 1 , 5v 1 , 5w 1 and 5u 2 , 5v 2 , 5w 2 in the bushings of each phase fixed to the case 2 and the opening / closing portion 15 with the opening / closing mechanism fixed in the case 2 as described above. of each phase of the connection terminals 23u 1, 23v 1, 23w 1 and 23u 2, with 23v 2, the flexible conductor between 23w 2 50u 1, 50v 1, 50w 1 and 50u 2, 50v 2, 50w 2 , bolts 52 and the nut 53 are electrically connected.
[0051]
Next, after the lid 51 is attached and the inside of the case 2 is evacuated, the arc extinguishing gas SF 6 gas 26 is filled in the case 2 until a predetermined amount or a predetermined pressure is reached, and an adsorbent is set. Case 2 is hermetically sealed to complete the assembly. FIGS. 8 and 9 show the appearance of the assembled state.
[0052]
Next, the operation of the opening / closing mechanism will be described with reference to FIG.
[0053]
FIG. 21 (a) shows a switch open (closed) state.
[0054]
From the state of FIG. 21A, when the opening / closing operation handle 13 is opened to rotate the handle direct drive lever 32 counterclockwise, the latching portion 32a of the handle direct drive lever 32 is moved to the accumulator spring 33. One end 33a is pushed and rotated counterclockwise in the figure. At this time, since the electrode direct drive lever 31 is locked by being prevented from rotating counterclockwise by the open side latch 34, the other end 33 b of the accumulator spring 33 is the latching portion 31 a of the electrode direct drive lever 31. It does not move when locked to. Therefore, the power storage spring 33 is wound and stored.
[0055]
Further, when the handle direct connection drive lever 32 further rotates counterclockwise and the release side pressing portion 32d reaches the engagement portion 34b of the release side latch 34 as shown in FIG. 21 (c), the engagement portion 34b is pushed and moved outward by the opening-side pressing portion 32d to be released from the locking portion 31b, and the electrode direct drive lever 31 is unlocked. When the lock is released in this way, the electrode direct drive lever 31 is rotated in the counterclockwise direction in the drawing by the spring force accumulated in the accumulation spring 33. When rotating in this way, the opening / closing shaft 19 directly connected to the lever 31 is also rotated in the opening direction at once, and the movable electrode 25 is separated from the fixed electrode 24 from the input state of FIG. 12 is opened, and the electric circuit is opened.
[0056]
When the opening is completed in this way, as shown in FIG. 21 (d), the electrode direct drive lever 31 has one of its locking portions 31b locked to the stopper 36 to prevent excessive rotation, The closing latch 35 is locked to the other locking portion 31e.
[0057]
21A shows the input state, FIG. 21B shows the accumulation operation, FIG. 21C shows the release operation, and FIG. 21D shows the release state.
[0058]
Next, description will be given of the case of closing (closing) from the open (opening) state.
[0059]
In the opened state of FIG. 21D, the operating handle 13 is turned in the closing direction opposite to that described above to perform the closing operation. By this closing (closing) operation, the handle direct connection drive lever 32 directly connected to the handle shaft 14 is rotated in the clockwise direction, contrary to the above-described opening. By this rotation, the latching portion 32a of the handle direct connection drive lever 32 pushes and rotates the other end 33b of the accumulator spring 33 in the clockwise direction in the figure. At this time, since the electrode direct drive lever 31 is locked by being prevented from turning clockwise by the closing latch 35, one end 33a of the accumulating spring 33 is engaged with the latching portion 31a of the electrode direct drive lever 31. Stopped and doesn't move. For this reason, the accumulating spring 33 is wound up and accumulated.
[0060]
Further, when the handle direct connection drive lever 32 is rotated in the clockwise direction and the closing side pressing portion 32f reaches the engaging portion 35b of the closing side latch 35, the engaging portion 35b is moved outward by the closing side pressing portion 32f. To move outward from the locking portion 31e, and the electrode direct drive lever 31 is unlocked. When the lock is released in this way, the electrode direct drive lever 31 is rotated clockwise in the drawing at once by the spring force accumulated in the force accumulation spring 33. When rotating in this way, the opening / closing shaft 19 directly connected to the lever 31 is also rotated in the closing direction, and the movable electrode 25 is moved from the open state of FIG. 12 to the fixed electrode as shown in FIG. 24, and the electric circuit is closed.
[0061]
When the insertion is completed in this way, as shown in FIG. 21A, the electrode direct drive lever 31 has the other locking portion 31e locked by the stopper 36 to prevent excessive rotation, The open side latch 34 is locked to one locking portion 31b and locked.
[0062]
Next, the arc extinguishing operation at the time of opening and closing will be described.
[0063]
When the opening / closing operation handle 13 is opened from the closed state as described above, the movable electrode 25 is rotated in the direction of the arrow from the closed state in FIG. At the time of separation from 25 fixed electrodes 24, arc discharge occurs between these electrodes 24 and 25.
[0064]
In this case, SF 6 gas 26 of the power supply side and load side of the arcing chamber 18u 1, 18v 1, 18w 1 and 18 u 2, 18v 2, 18w in 2, the front of the nozzle guide 27 which rotates together with the movable electrode 25 The flow rate and the flow rate of the SF 6 gas 26 are increased in the passage 27c that is collected by being compressed by the guide portion 27b that is expanded in a trumpet shape and further narrowed by the throttle portion 27d, and the flow rate and the flow rate are increased. The gas flow is blown at once to the arc generated in the vicinity of the arcing portion 25c of the movable electrode 25, blows off the arc, and then is released from the discharge portion 27e that is gently expanded rearward and extinguishes. . The SF 6 gas that has blown off the arc is then discharged out of the housing 18 (inside the case 2) through the flow ports 18a and 18b.
[0065]
When the opening / closing operation handle 13 is turned on from the opened state of FIG. 12 and the movable electrode 25 is turned clockwise from FIG. 12 and turned on, the power supply side and the load side are turned off. The arc chambers 18u 1 , 18v 1 , 18w 1 and 18u 2 , 18v 2 , 18w 2 are in a pseudo-vacuum (reduced pressure) state due to the rapid clockwise rotation of the movable electrode 25, and the SF 6 gas 26 in the case 2 Enters the arc-extinguishing chambers through the flow ports 18a and 18b, and is blown to the arc generated between the electrodes 24 and 25 through the nozzle guide 27, and the arc is extinguished. In this connection (closed circuit), a preceding discharge occurs between the electrodes 24 and 25. However, since the movable electrode 25 is immediately inserted into the fixed electrode 24, the time of the preceding discharge becomes extremely short and has almost no influence. The movable electrode 25 is thrown into the fixed electrode 24 without being received.
[0066]
【The invention's effect】
As described above, according to the present invention, it is only necessary to set a unit-type opening / closing mechanism with an opening / closing mechanism integrally formed in advance in the case, such as a movable electrode, a fixed electrode, an opening / closing mechanism. This can be placed in the case at a time, so the assembly work is much easier than in the conventional case where the fixed electrode, movable electrode, opening / closing mechanism, etc. are individually assembled in the case. Become.
[Brief description of the drawings]
FIG. 1 is a plan view showing an assembled state of a cased switch before attaching a lid, showing an embodiment of the present invention.
2A and 2B show a unit-type opening / closing part with an opening / closing mechanism in FIG. 1, in which FIG. 2A is a plan view, and FIG. 2B is a bottom view of FIG.
FIG. 3 is a partial cross-sectional view showing a connection state between an opening / closing operation handle and an opening / closing mechanism.
FIG. 4 is a plan view showing a connection state of flexible conductors.
FIG. 5 is a side view showing the connection state.
FIG. 6 is a perspective view of a flexible conductor.
FIG. 7 is a perspective view of a conductive plate as another example of a flexible conductor.
FIG. 8 is a side view of the cased switch in the assembled state as seen from the handle side.
FIG. 9 is a side view similarly seen from the bushing side.
FIG. 10 is a cross-sectional view illustrating a U-phase input (closed) state for explaining an arc extinguishing operation;
FIG. 11 is a cross-sectional view showing a state in which the U phase is being opened.
FIG. 12 is a cross-sectional view showing a U-phase open (open) state.
FIG. 13 is a front view of a movable electrode.
FIG. 14 is a plan view showing a state in which an opening / closing shaft, a nozzle guide, and a movable electrode are assembled.
FIG. 15 is a plan sectional view showing an assembled state of the opening / closing part.
FIG. 16 is a perspective view of a nozzle guide.
FIG. 17 is a front view of the nozzle guide.
FIG. 18 is a plan view of the same.
FIG. 19 is a side view of the same.
FIG. 20 is a perspective view of the nozzle guide in a state of being attached to the movable electrode.
FIG. 21 is a schematic structural diagram for explaining the operation of the opening / closing mechanism, in which (a) is a closing state, (b) is a storage state, (c) is during an opening operation, and (d) is an opening state. Show.
FIG. 22 is a cross-sectional view schematically showing an opening / closing mechanism.
FIG. 23 is a schematic structural diagram of a conventional cased switch.
[Explanation of symbols]
2 Case 2a, 2b Side wall 23u 1 , 23v 1 , 23w 1 power supply side connection terminal 23u 2 , 23v 2 , 23w 2 load side connection terminal 4u 1 , 4v 1 , 4w 1 power supply side bushing 4u 2 , 4v 2 , 4w 2 load side bushing 5u 1 , 5v 1 , 5w 1 bushing terminal connection portion 5u 2 , 5v 2 , 5w 2 load side bushing terminal connection portion 13 opening / closing operation handle 14 handle shaft 15 opening and closing mechanism with closing portion 16 closing section 18 housing 19 opening and closing shaft 24 fixed electrode 25 the movable electrode 30 operating device 50 flexible conductor 50u 1, 50v 1, 50w 1 flexible conductor 50u 2, 50v 2, 50w 2 Friendly Flexible conductor 54 Conductive plates 50a, 54a Mounting holes

Claims (2)

ハウジングと、該ハウジング内に設けた開閉軸と、該開閉軸に、この開閉軸と直交する方向に設けた可動電極と、前記ハウジングにおいて前記可動電極に対応するように設けた固定電極と、該固定電極に接続してハウジングの外側へ突設した電源側及び負荷側の接続端子と、ハウジングにおける前記開閉軸の軸方向の一端側に設けた開閉機構部とからなるユニット型の開閉機構付き開閉部を、
側壁を有するケース内に設けた開閉器であって、
前記開閉部の電源側及び負荷側の接続端子と向い合う側のケース側壁には、夫々の内端に端子接続部を有する電源側及び負荷側のブッシングを夫々3つ貫装し、
前記電源側及び負荷側のブッシングを設けた夫々のケースの側壁を、3つの壁面で構成し、隣接する壁面を内側方向に曲折するように配設し、夫々の壁面に電源側又は負荷側のブッシングを1個設け、
前記ケースの側壁に、開閉用操作ハンドルを軸着し、該開閉用操作ハンドルのハンドル軸と前記開閉機構部における開閉軸とを連結し、
前記開閉用操作ハンドルを設けたケースの側壁と対向するケースの側壁に、ケース内圧が急激に上昇した場合にその圧力をケース外へ放圧する安全弁を設け、
前記端子接続部と前記接続端子とを可撓導体で電気的に接続することを特徴とするケース入り開閉器。
A housing, an opening / closing shaft provided in the housing, a movable electrode provided on the opening / closing shaft in a direction perpendicular to the opening / closing shaft, a fixed electrode provided to correspond to the movable electrode in the housing, Opening / closing with a unit-type opening / closing mechanism consisting of a connecting terminal on the power supply side and load side that is connected to a fixed electrode and protrudes to the outside of the housing, and an opening / closing mechanism portion provided on one end side of the opening / closing shaft in the axial direction of the housing Part
A switch provided in a case having a side wall,
Three side bushings on the power supply side and the load side having terminal connection portions at the inner ends thereof are inserted in the case sidewalls on the side facing the connection terminals on the power supply side and the load side of the opening and closing unit, respectively.
The side walls of each case provided with the power supply side and load side bushings are constituted by three wall surfaces, and the adjacent wall surfaces are arranged so as to bend inwardly. One bushing,
An opening / closing operation handle is pivotally attached to the side wall of the case, and the handle shaft of the opening / closing operation handle is connected to the opening / closing shaft of the opening / closing mechanism section,
Provided on the side wall of the case facing the side wall of the case provided with the opening / closing operation handle is a safety valve that releases the pressure outside the case when the internal pressure of the case suddenly increases,
A case-containing switch, wherein the terminal connection portion and the connection terminal are electrically connected by a flexible conductor .
前記ブッシングを設けた壁面において、該壁面を構成する3面の隣接する壁面間の内角を150度に設定したことを特徴とする請求項1記載のケース入り開閉器。 2. The cased switch according to claim 1, wherein an inner angle between three adjacent wall surfaces constituting the wall surface is set to 150 degrees on the wall surface provided with the bushing .
JP2002346906A 2002-11-29 2002-11-29 Cased switch Expired - Lifetime JP4409822B2 (en)

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