JP2004006241A

JP2004006241A - Gas breaker housing

Info

Publication number: JP2004006241A
Application number: JP2003005891A
Authority: JP
Inventors: Tomokazu Akiyama; 秋山　知一; Akira Baba; 馬場　昭; Koichi Ayabe; 綾部　浩一
Original assignee: Daihen Corp
Current assignee: Daihen Corp
Priority date: 2002-03-28
Filing date: 2003-01-14
Publication date: 2004-01-08
Anticipated expiration: 2023-01-14
Also published as: JP4252318B2

Abstract

<P>PROBLEM TO BE SOLVED: To improve the hermeticity and reliability of the gas container in a gas breaker housing which comprises a gas container and a mechanism cover. <P>SOLUTION: A gas container 11 comprises a gas container main part 13a having outward flanges 13b1 and 13b2 on an opening at the top of its body which is shaped like a halved cylinder, a gas container body having a bag-shaped first and second end members 14 and 15 welded along the edges to the both ends of the gas container main part 13a, and a cover member 17 of the gas container body which is arranged so as to close the opening at the top of the gas container body and welded along the edges to the gas container body. A mechanism housing main part 18 which is composed of a body 18a1 shaped like a halved cylinder and an end plate 18a2 is welded to the gas container main part at the edges, and a cover member 19 is welded so as to close the opening of a mechanism housing space 18e formed between the mechanism housing main part 18 and the end member 15 of the gas container. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、配電系統において、電柱等に装着して用いられるガス開閉器の開閉器と操作機構とを収容するケースに関するものである。
【０００２】
【従来の技術】
電柱等に取りつけて使用されるガス開閉器は、接点部で生じるアークを消孤するためにＳＦ６ガス等の消孤性を有する絶縁ガス中に配置される開閉器と、該開閉器を操作する操作機構とにより構成される。この種の開閉器において、開閉器と操作機構とを共に絶縁ガスを封入した容器内に収容することも考えられるが、このように構成した場合には、絶縁ガスの量が多くなるため不経済である。
【０００３】
そこで、この種の開閉器では、ガス開閉器のケースを、開閉器を収容するガス容器の部分と、操作機構を収容する機構容器の部分とに分けて、ガス容器内にのみ絶縁ガスを収容している。
【０００４】
図１０は従来のガス開閉器のケース１を示したもので、同図に示したケース１は、底板１ａと、底板１ａの相対する２辺から立ち上がった対の側板１ｂ，１ｃと、側板１ｂ，１ｃの上端部間に跨って配置された天板１ｅとを溶接することにより構成されたケース本体と、該ケース本体の内側に形成された空間を仕切るように配置されて側板１ｂ、１ｃと底板１ａと天板１ｅとに溶接された仕切板１ｄと、ケース本体の軸線方向の一端及び他端側にそれぞれ形成された開口部１ｆ及び１ｇをそれぞれ閉じる端板１ｈ及び１ｉとを備えている。
【０００５】
このケースにおいては、仕切板１ｄと側板１ｂ及び１ｃと端板１ｈとにより囲まれた部分によりガス容器１Ａが構成され、仕切板１ｄと側板１ｂ及び１ｃと端板１ｉとにより囲まれた部分により機構容器１Ｂが構成されている。側板１ｂ及び１ｃのガス容器１Ａを構成する部分には、ガス容器１Ａ内に収容された３相の開閉器の可動接点側及び固定接点側にそれぞれ接続される端子導体を貫通させて外部に導出するブッシングを取り付けるための取付孔１ｊ及び１ｋが形成されている。この種のケースは例えば特許文献１に示されている。
【０００６】
【特許文献１】
特許第２９８３０５１号公報
【０００７】
【発明が解決しようとする課題】
ガス開閉器用ケースを図１０に示すように構成する場合には、底板１ａと側板１ｂ及び１ｃと天板１ｅとを溶接してケース本体を形成した後、このケース本体の内側で仕切り板１ｄを底板１ａと側板１ｂ及び１ｃと天板１ｅとに溶接してケース本体内をガス容器１Ａとして用いる部分と機構容器１Ｂとして用いる部分とに仕切り、次いで、開口部１ｆからガス容器１Ａ内に開閉器の構成部品を組み込み、更に開口部１ｇから機構容器１Ｂ内に操作機構の構成部品を組み込んだ後、端板１ｈ及び１ｉをそれぞれ開口部１ｆ及び１ｇの周縁部に溶接してケースを閉じるようにしていた。
【０００８】
しかしながら、このようにケースの側面の開口部から開閉器及び操作機構の構成部品を組み込むようにした場合には、ケースの奥の部分に部品を組み込む際の作業性が悪いという問題があった。
【０００９】
また図１０に示すように構成した場合には、仕切板１ｄと側板１ｂ，１ｃとの溶接をケース本体内の狭いスペースで行うため、側板１ｂ，１ｃ及び仕切板１ｄと底板１ａとの溶接部がそれぞれ隅肉溶接となり、これらの溶接部にはピンホール等の溶接欠陥が生じ易いため、ガス容器のシールの信頼性を高くすることが難しいという問題があった。
【００１０】
本発明の目的は、ガス容器及び機構容器の上端を開口させた状態で開閉器の構成部品及び操作機構の構成部品を組み込むことができるようにして、部品を組み込む際の作業性を向上させることができるようにしたガス開閉器用ケースを提供することにある。
【００１１】
本発明の他の目的は、ガス容器を構成するすべての板部材の溶接部をヘリ溶接による溶接部として、ガス容器のシールの信頼性を向上させることができるようにしたガス開閉器用ケースを提供することにある。
【００１２】
【課題を解決するための手段】
本発明は、開閉器の接点部品を絶縁ガスと共に収容するガス容器と、開閉器の操作機構を収容するためにガス容器に隣接させて設けられた機構容器とを備えたガス開閉器用ケースを対象とする。
【００１３】
本発明においては、上記ガス容器が、軸線方向の一端側及び他端側で互い反対方向に開口した第１及び第２の開口部とこれら第１及び第２の開口部の開口方向に対して直角な方向に開口した第３の開口部とを有して周壁部の両端の端縁部が第３の開口部で相対している半割筒状のガス容器胴部と、ガス容器胴部の周壁部の両端の端縁部から外側に折れ曲がって互いに反対方向に張り出した第１及び第２の張出部とを有するガス容器主部と、ガス容器胴部の周壁部の内側に嵌合し得る形状を有する第１の端板部と該第１の端板部の周縁部から該第１の端板部の板面と直角な方向に突出した第１の側板部とにより袋状の形状に形成されて、第１の側板部の開口側端部をガス容器胴部の第１の開口部と同じ側に向けてガス容器胴部の周壁部の内側に嵌合された状態で第１の側板部の先端が第１の開口部の周縁部にヘリ溶接された第１の端部材と、ガス容器胴部の周壁部の内側に嵌合し得る形状を有する第２の端板部と該第２の端板部の周縁部から該第２の端板部の板面と直角な方向に突出した第２の側板部とにより袋状の形状に形成されて、第２の側板部の開口側端部をガス容器胴部の第２の開口部と同じ側に向けてガス容器胴部の周壁部の内側に嵌合された状態で第２の側板部の先端が第２の開口部の周縁部にヘリ溶接された第２の端部材と、ガス容器主部と第１及び第２の端部材とにより構成されたガス容器本体の開口部を閉じるように形成されて周縁部がガス容器本体の開口部の周縁部にヘリ溶接されたガス容器用蓋部材とを備えている。
【００１４】
また機構容器は、ガス容器胴部の周壁部の外面に沿うように形成されて一部がガス容器胴部に重ね合わされた機構容器胴部と、機構容器胴部のガス容器と反対側の端部を閉じるように設けられてガス容器の第２の端部材の端板部に対向配置された端板部とを有して、機構容器胴部のガス容器側の端部がガス容器胴部の外面に溶接された機構容器本体と、該機構容器本体の開口部を閉じるように設けられて機構容器本体とガス容器用蓋部材とに溶接された機構容器用蓋部材とを備えている。
【００１５】
なおヘリ溶接（共付け溶接とも呼ばれる）は、重ね合わせた２枚の板の端部（母材）どうしを共に溶融させて溶融した金属を一体化する溶接方法で、溶接部で２枚の板が溶け合って一体化するため、ピンホールなどの欠陥が生じ難い溶接部を得ることができる。
【００１６】
上記のように構成すると、ガス容器を構成する板部材をすべてピンホールが生じ難いヘリ溶接により接合することができ、またガス容器のすべての溶接箇所の溶接作業を容器の外側から行なうことができるため、ガス容器本体内の狭いスペースで仕切板の溶接を行なう必要があった従来のガス開閉器用ケースに比べてピンホール等の溶接欠陥が生じる確率を少なくすることができる。従ってガス容器のシールの信頼性を高めることができ、ガス漏れのおそれがないガス容器を得ることができる。
【００１７】
また上記のように構成すると、容器本体と第１及び第２の端部材とを溶接して上端が開口した箱体を形成し、更にこの箱体に機構容器主部を溶接して上端が開口した機器収容空間を形成して、箱体の上端の開口部及び機器収容空間の上端の開口部からそれぞれの内部に開閉器の構成部品及び操作機構の構成部品を組み込んだ後、ガス容器用蓋部材を箱体にヘリ溶接し、次いで機構容器主部とガス容器用蓋部材とに機構容器用蓋部材を溶接してケースを閉じるといった手順でケースを組み立てることができる。
【００１８】
従って、ガス容器用蓋部材及び機構容器用蓋部材を取りつける前の段階で、箱体の上端に形成された広い開口部及び機器収容空間の上端に形成された広い開口部を通して、ガス容器内及び機構容器内にそれぞれ開閉器の構成部品及び操作機構の構成部品を組み込むことができるため、開閉器及び操作機構を組み込む際の作業を容易にすることができる。
【００１９】
【発明の実施の形態】
以下図面を参照して本発明の実施の形態を説明する。
【００２０】
本発明においては、開閉器の構成部品及び操作機構の構成部品をそれぞれガス容器内及び機構容器内に組み込む際に、部品の組み込み作業を、ガス容器及び機構容器のそれぞれの上端に形成した開口部を通して行うことができるようにする。そのため、開閉器の構成部品及び操作機構の構成部品をそれぞれガス容器内及び機構容器内に組み込んだ後に、ガス容器用の蓋部材及び機構容器用の蓋部材を取りつけることができるようにする。
【００２１】
また本発明では、ガス容器のすべての溶接箇所の溶接を容器の外側からヘリ溶接により行なうことができるようにして、ガス容器のシールの信頼性の向上を図る。
【００２２】
ガス容器及び機構容器の上端を開口させた状態で両容器内に部品を組み込んだ後、両容器の開口部を閉じるようにするために、例えば、図１１（Ａ）に示したように、底板１ａと、側板１ｂ及び１ｃと、仕切板１ｄと、端板１ｈ及び１ｉとを溶接して、仕切板１ｄにより相互間が仕切られ、上端が開口したガス容器１Ａ及び機構容器１Ｂを形成した後、ガス容器１Ａ内及び機構容器１Ｂ内にそれぞれ部品を組み込み、次いで、図１１（Ｂ）に示したようにガス容器１Ａの上端の開口部にガス容器用の天板１ｅ１を溶接した後、図１１（Ｃ）に示したように機構容器１Ｂの上端の開口部に機構容器用の天板１ｅ２を溶接することが考えられる。
この場合、図１２（Ａ）及び（Ｂ）に示すように、端板１ｈ及び仕切板１ｄの周縁部に板状の側板部１ｈ１及び１ｄ１を形成して、これらの板を袋状にしておくことにより、ガス容器の端板１ｈの側板部１ｈ１と底板１ａとの溶接部Ｗａ、端板１ｈの側板部１ｈ１と側板１ｂ，１ｃとの溶接部Ｗｂ、天板１ｅ１と端板１ｈの側板部１ｈ１との溶接部Ｗｃ及び天板１ｅ１と仕切板１ｄの側板部１ｄ１との溶接部Ｗｄをヘリ溶接とすることができるが、仕切板１ｄの側板部１ｄ１と側板１ｂ及び１ｃとの溶接部Ｗｅ及び仕切板１ｄの側板部１ｄ１と底板１ａとの溶接部Ｗｆは隅肉溶接になる。またこの溶接部Ｗｆの溶接は、容器内の狭いスペースで行なわなければならない。このような構造では、隅肉溶接となる溶接部Ｗｅ及びＷｆの部分にピンホールが生じ易いため、ガス容器のシールの信頼性が低下するという問題が生じる。
【００２３】
そこで、本発明においては、ガス容器を構成するすべての板部材の溶接部を、重ね合わされた板の端部どうしのヘリ溶接として、その溶接作業をすべて容器の外側から行なうことができるように、ケースの構造を工夫した。
【００２４】
図１（Ａ）ないし（Ｃ）は、本発明に係わるガス開閉器用ケース１０の基本的な構造を示したもので、図１（Ａ）はケースの正面図、同図（Ｂ）はケースを正面から見て縦断面した正面縦断面図、同図（Ｃ）は同図（Ｂ）のＣ−Ｃ線断面図である。またこのガス開閉器用ケースで用いるガス容器の構成要素と構造とを説明するための斜視図を図２（Ａ）ないし（Ｃ）及び図３（Ａ）ないし（Ｃ）に示した。
【００２５】
図１（Ａ）ないし（Ｃ）に示されたように、本発明に係わるガス開閉器用ケース１０は、開閉器の構成部品が絶縁ガスと共に収容されるガス容器１１と、開閉器の操作機構が収容される機構容器１２とから構成される。
【００２６】
ガス容器１１は、図２（Ａ）に示すように構成されたガス容器主部１３と、図２（Ｂ）及び（Ｃ）にそれぞれ示された第１及び第２の端部材１４及び１５とにより図３（Ｂ）に示すように構成されたガス容器本体１６と、このガス容器本体１６の開口部を閉じるガス容器用蓋部材１７（図３Ａ参照）とにより、図３（Ｃ）のように組み立てられる。
【００２７】
図２（Ａ）に示したように、ガス容器主部１３は、矩形状の底板部１３ａ１と、底板部１３ａ１の幅方向の両端から直角に起立した１対の側板部１３ａ２及び１３ａ３とからなる断面Ｕ字形の周壁部を有して、軸線方向の一端側及び他端側で互い反対方向に開口した第１及び第２の開口部ａ１及びａ２と、これら第１及び第２の開口部の開口方向に対して直角な方向に開口した第３の開口部ａ３とが設けられた半割筒状のガス容器胴部１３ａと、このガス容器胴部１３ａの周壁部の両端（側板部１３ａ２，１３ａ３の底板部１３ａ１と反対側の端部）の端縁部ｂ１及びｂ２から外側に直角に折れ曲がって互いに反対方向に張り出した第１及び第２の張出部１３ｂ１及び１３ｂ２とからなっている。
【００２８】
本発明に係わるガス開閉器用ケースは、通常、ガス容器胴部１３ａの第３の開口部ａ３を上方に向けた状態で配置される。本発明において、ケースの取り付け姿勢は何ら限定されないが、以下の説明では、ガス容器胴部１３ａの第３の開口部ａ３を上方に向けた状態をケースの基本取り付け姿勢として各部の位置関係を説明する。
【００２９】
第１の端部材１４は、図２（Ｂ）に示したように、半割筒状のガス容器胴部１３ａの周壁部の内側に嵌合し得る形状を有する矩形状の第１の端板部１４ａと、該第１の端板部の周縁部から該第１の端板部の板面と直角な方向に突出した第１の側板部１４ｂとにより袋状の形状に形成されている。第１の端部材１４は、図３（Ｂ）に示したように、第１の側板部１４ｂの開口側端部をガス容器胴部１３ａの第１の開口部ａ１と同じ側に向けてガス容器胴部１３ａの周壁部の内側に嵌合された状態で配置されて、第１の側板部１４ｂの先端がガス容器胴部の第１の開口部ａ１の周縁部にヘリ溶接されている。
【００３０】
また第２の端部材１５は、図２（Ｃ）に示したように、ガス容器胴部１３ａの周壁部の内側に嵌合し得る形状を有する第２の端板部１５ａと該第２の端板部１５ａの周縁部から該第２の端板部の板面と直角な方向に突出した第２の側板部１５ｂとにより袋状の形状に形成されている。第２の端部材１５は、図３（Ｂ）に示したように、その第２の側板部１５ｂの開口側端部をガス容器胴部１３ａの第２の開口部ａ２と同じ側に向けてガス容器胴部１３ａの周壁部の内側に嵌合された状態で、第２の側板部１５ｂの先端がガス容器胴部の第２の開口部ａ２の周縁部にヘリ溶接されている。
【００３１】
本実施形態では、上記のように第１及び第２の端部材１４及び１５をガス容器胴部１３ａに取り付けた状態で、第１及び第２の端部材１４及び１５の上端寄りの部分がガス容器胴部１３ａの上端の開口部（第３の開口部）より突出するように第１及び第２の端部材１４及び１５の高さ寸法が設定されている（図３Ｂ参照）。
【００３２】
ガス容器主部１３と、第１及び第２の端部材１４及び１５とによりガス容器本体１６が構成され、このガス容器本体内に開閉器の構成部品が収容された後、該ガス容器本体の上端の開口部が、図３（Ａ）に示したガス容器用蓋部材１７により閉じられる。
【００３３】
ガス容器用蓋部材１７は、ガス容器本体１６の第１の端部材１４と第２の端部材１５との間に跨って配置されて、ガス容器胴部１３ａの第３の開口部ａ３の全体をカバーし得るように寸法が設定された矩形状の天板部１７ａ１と、この天板部１７ａ１の幅方向の両端から同じ側に該天板部と直角な方向に折れ曲がった第１及び第２の側板部１７ａ２及び１７ａ３とを有する半割筒状の蓋体胴部１７ａと、この蓋体胴部の側板部１７ａ２及び１７ａ３の天板部１７ａ１と反対側の端部から外側に直角に折れ曲がって互いに反対方向に張り出した第１及び第２の板状の張出部１７ｂ１及び１７ｂ２とを一体に有する部材からなっている。
【００３４】
ガス容器用蓋部材１７は、図３（Ｃ）に示したように、ガス容器本体１６の上端の開口部から突出した第１及び第２の端部材１４及び１５の開口側端部に嵌合させた状態で配置されて、その第１及び第２の張出部１７ｂ１及び１７ｂ２がガス容器主部１３の第１及び第２の張出部１３ｂ１及び１３ｂ２に重合配置される。
【００３５】
そして、蓋部材１７の天板部１７ａ１及び側板部１７ａ２及び１７ａ３と第１及び第２の端部材１４及び１５の側板部１４ｂ及び１５ｂとの重ね合わせ部がヘリ溶接されるとともに、第１及び第２の張出部１７ｂ１及び１７ｂ２とガス容器主部の張出部１３ｂ１及び１３ｂ２との重ね合わせ部がヘリ溶接されて、蓋部材１７がガス容器本体１６に接合される。
【００３６】
図１（Ａ）及び（Ｂ）において、Ｗ１はガス容器胴部１３ａと第１の端板部１４との溶接部を示し、Ｗ２はガス容器胴部１３ａと第２の端板部１５との溶接部を示している。またＷ３は蓋部材１７とガス容器本体１６との溶接部を示している。
【００３７】
上記のように、本発明によれば、ガス容器１１のすべての溶接部を重合された板の端部どうしのヘリ溶接とすることができ、すべての溶接部の溶接作業を容器の外部から行なうことができるため、ガス容器の溶接部にピンホール等の溶接欠陥が生じるおそれをなくして、ガス容器のシールの信頼性を高めることができる。
【００３８】
次に機構容器１２は、図１に示したように、機構容器本体１８と、この機構容器本体の上端の開口部を閉じる機構容器用蓋部材１９とからなっていて、その一部をガス容器１１の端部に重ね合わせた状態でガス容器１１に溶接される。
【００３９】
更に詳細に説明すると、機構容器本体１８は、底板部１８ａ１１と側板部１８ａ１２及び１８ａ１３とを備えた半割筒状の機構容器胴部１８ａ１と、この機構容器胴部１８ａ１のガス容器１１と反対側の端部を閉じるように設けられてガス容器１１の第２の端部材１５の端板部１５ａに対向配置された端板部１８ａ２とを備えた機構容器主部１８ａと、機構容器主部１８ａの上端の開口部から外側に張り出すように設けられた張出部１８ｂとを備えた部材からなっている。
【００４０】
機構容器本体１８は、機構容器胴部１８ａ１の一部をガス容器胴部１３ａに外側から嵌合させた状態で配置して該機構容器胴部１８ａ１の端縁部をガス容器胴部１３ａの周壁部の外面に隅肉溶接（図１Ａの溶接部Ｗ４）することによりガス容器１１に取り付けられている。このように機構容器本体１８をガス容器１１に取り付けることにより、機構容器本体１８とガス容器の端部材１５との間に機器収容空間１８ｅが形成される。
【００４１】
機構容器用蓋部材１９は、ガス容器用蓋部材１７の天板部１７ａ１に一部が重ね合わせた状態で配置される天板部１９ａ１１と、この天板部の幅方向の両端から下方に直角に折れ曲がった１対の側板部１９ａ１２及び１９ａ１３とからなる半割筒状の胴部１９ａ１と、この胴部のガス容器１１と反対側の端部を閉じる端板部１９ａ２とを一体に備えた蓋部材主部１９ａと、この蓋部材主部１９ａの下端の開口部から外側に張り出した張出部１９ｂとからなっている。
【００４２】
図１（Ａ）に示したように、機構容器用蓋部材１９の胴部１９ａ１の側板部１９ａ１２及び１９ａ１３には、ガス容器主部１３の張出部１３ｂ１及び１３ｂ２と、ガス容器用蓋部材１７の張出部１７ｂ１及び１７ｂ２の機構ケース側の端部とを受け入れるための切り欠き部１９ｃが形成されている。
【００４３】
機構容器用蓋部材１９は、機構容器本体１８とガス容器の第２の端部材１５との間に形成された機器収容空間１８ｅ内に開閉器の操作機構を組み込んだ後、その天板部１９ａ１の一部と側板部１９ａ１２及び１９ａ１３の一部とをそれぞれガス容器用蓋部材１７の天板部１７ａ１の端部外面と側板部１７ａ２及び１７ａ３の端部外面とに重ね合わせた状態で、機器収容空間１８ｅの上端の開口部を閉じるように配置される。そして、蓋部材１９の張出部１９ｂが機構容器本体１８の張出部１８ｂに隅肉溶接（図１Ｂ及びＣの溶接部Ｗ５参照）されるとともに、胴部１９ａ１のガス容器側の開口部の端縁部がガス容器１１の外面に隅肉溶接（図１Ａ及びＢの溶接部Ｗ６参照）されて、蓋部材１９が機構容器本体１８とガス容器１１とに接続される。
【００４４】
上記のように構成すると、ガス容器胴部１３ａと第１の端部材１４との溶接部Ｗ１、ガス容器胴部１３ａと第２の端部材１５との溶接部Ｗ２、及びガス容器用蓋部材１７とガス容器本体１６との溶接部Ｗ３をすべてピンホールが生じ難いヘリ溶接とすることができるため、ＳＦ６ガス等の絶縁ガスが高い圧力で封入されるガス容器１１のシールの信頼性を向上させることができる。
【００４５】
なお図１に示した例において、機構容器用蓋部材１９と機構容器本体１８との溶接部Ｗ５と、機構容器１２とガス容器１１との溶接部Ｗ４及びＷ６は隅肉溶接による溶接部となるが、機構容器１２内は大気圧であるため、溶接部Ｗ４ないしＷ６を隅肉溶接による溶接部としても何ら差し支えがない。
【００４６】
図１には、ケースの各部の形状を単純化するとともに、各部の板厚を誇張してその基本的な構造を示したが、本発明に係わるガス開閉器用ケースの更に具体的な構成例を図４ないし図８に示した。これらの図において、図１ないし図３の各部と同等の部分にはそれぞれ図１ないし図３で用いた符号と同一の符号を付してある。
【００４７】
図４ないし図８に示した例において、ガス容器１１及び機構容器１２の基本的な構造は、図１ないし図３に示した例とほぼ同様である。
【００４８】
この例では、ガス容器用蓋部材１７の天板部１７ａ１に装柱用金具２０が取りつけられ、ガス容器本体１３の底板部１３ａ１に脚部２１が取りつけられている。
【００４９】
更に、ガス容器本体１３の第１の側板部１３ａ２及び第２の側板部１３ａ３にガス容器内の開閉器につながる端子導体を貫通させるブッシングを取りつけるための開口部１３ｆ及び１３ｇが形成され、機構容器１２内に配置される操作機構の操作出力をガス容器内の開閉器に伝達するための操作軸を気密保持構造の軸受を介して支持する軸支持部２２がガス容器の第２の端部材１５の端板部１５ａを貫通させた状態で設けられている。
【００５０】
また開閉器の「入」、「切」状態を確認する指針軸を気密保持構造で支持する軸支持部２３と、ガス容器１０Ａの内圧が上昇したときにガス容器内の圧力を開放させる放圧装置の取り付け部（開口部）２４と、ガス容器の圧力テストを行う際に用いられる気密栓２５とがガス容器の第１の端部材１４の端板部１４ａに設けられている。
【００５１】
機構容器本体１８の端板部１８ａ２には、開閉器を手動操作する際に、手動操作ハンドルの軸部を支持するハンドル軸支持筒体２６が取りつけられている。
【００５２】
その他の部分は、図１に示した例とほぼ同様な構造を有するように構成されており、ガス容器本体１３と第１の端部材１４との溶接部Ｗ１、ガス容器本体１３と第２の端板部１５との溶接部Ｗ２、ガス容器用蓋部材１７とガス容器本体１３との溶接部Ｗ３はすべてヘリ溶接となっている。
【００５３】
上記ガス開閉器用ケースの各部は、ステンレス鋼のような耐食性を有する金属材料により形成するのが好ましい。
【００５４】
上記の実施形態では、ガス容器胴部１３ａの底板部１３ａ１と側板部１３ａ２及び１３ａ３との間の角部が角張った形状を呈するように、ガス容器胴部の断面形状が設定されているが、ガス容器胴部１３ａの断面形状は、上記の例に限定されない。例えば、図９（Ａ）に示すように、ガス容器胴部１３ａの底板部１３ａ１と側板部１３ａ２及び１３ａ３との間の角部の形状を、アールが付けられた形状としてもよい。
【００５５】
また図９（Ｂ）に示すように、ガス容器胴部１３ａの底板部１３ａ１と側板部１３ａ２及び１３ａ３との間にテーパを付けたコーナー部１３ａ４及び１３ａ５を設けて、ガス容器胴部の断面形状を船底形としてもよい。
【００５６】
更に図９（Ｃ）に示したように、ガス容器胴部１３ａの底板部１３ａ１の断面形状を円弧状に湾曲した形状としてもよい。
【００５７】
なお機構容器本体１９は、その一部をガス容器本体１６の端部に嵌合させ得るように、ガス容器本体の断面形状に応じて適宜の断面形状を持つように形成する。
【００５８】
【発明の効果】
以上のように、本発明によれば、ガス容器を構成する部材のすべての溶接部の溶接を、容器の外部からヘリ溶接により行なうことができる構造にしたので、ガス容器の溶接部でピンホールが生じるのを防いで、ガス容器の気密性を高めることができ、ガス容器の信頼性を向上させることができる。
【００５９】
また本発明によれば、ガス容器及び機構容器の上端を開口させた状態でガス容器内及び機構容器内への部品の組み込みを行った後、ガス容器用蓋部材及び機構容器用蓋部材を取り付けることができる構造にしたので、開閉器及び操作機構の構成部品の組み込みが容易なケースを提供することができ、ガス開閉器の組み立ての作業性を向上させることができる。
【図面の簡単な説明】
【図１】（Ａ）は本発明に係わるガス開閉器用ケースの一実施形態の基本的な構成を、各部の板厚を誇張して示した正面縦断面図、（Ｂ）は（Ａ）の右側面図、（Ｃ）は（Ｂ）のＣ−Ｃ線断面図である。
【図２】（Ａ）は本発明で用いるガス容器主部の構成例を示した斜視図、（Ｂ）は本発明で用いるガス容器の第１の端部材の構成例を示した斜視図、（Ｃ）は本発明で用いるガス容器の第２の端部材の構成例を示した斜視図である。
【図３】（Ａ）は本発明で用いるガス容器の蓋部材の構成例を示した斜視図、（Ｂ）はガス容器本体の構成例を示した斜視図、（Ｃ）は（Ｂ）のガス容器本体に（Ａ）の蓋部材を取り付けてガス容器を組み立てた状態を示した斜視図である。
【図４】本発明のより具体的な実施形態を示した上面図である。
【図５】図４のＡ−Ａ線断面図である。
【図６】図４の実施形態の右側面図である。
【図７】同実施形態の左側面図である。
【図８】同実施形態の要部の斜視図である。
【図９】（Ａ）ないし（Ｃ）は本発明で用いるガス容器主部の断面形状の種々の変形例を示した断面図である。
【図１０】従来のガス開閉器用ケースの構造を概略的に示した分解斜視図である。
【図１１】上端の開口部から部品の組み込みを行うことができるケースの構造の一例を、ケースへの蓋板の取り付け順序とともに説明するための斜視図である。
【図１２】（Ａ）は図１１に示したケースの機構容器部分の蓋板を外した状態での正面縦断面図、（Ｂ）は図１１に示したケースの機構容器部分の蓋板を取り付けた状態での正面縦断面図である。
【符号の説明】
１０…ガス開閉器用ケース、１１…ガス容器、１２…機構容器、１３…ガス容器主部、１３ａ…ガス容器胴部、１３ｂ１，１３ｂ２…張出部、１４…第１の端部材、１４ａ…端板部、１４ｂ…側板部、１５…第２の側板部、１５ａ…端板部、１５ｂ…側板部、１６…ガス容器本体、１７…ガス容器用蓋部材、１７ｂ１，１７ｂ２…張出部、１８…機構容器本体、１８ｂ…張出部、１９…機構容器用蓋部材、１９ｂ…張出部。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a case for housing a switch and an operation mechanism of a gas switch used by being mounted on a power pole or the like in a distribution system.
[0002]
[Prior art]
A gas switch mounted on a utility pole or the like is used for switching a switch arranged in an insulating gas having an isolating property such as SF6 gas for extinguishing an arc generated at a contact portion, and operating the switch. And an operation mechanism. In this type of switch, it is conceivable that both the switch and the operation mechanism are housed in a container in which insulating gas is sealed. However, in such a configuration, the amount of insulating gas increases, which is uneconomical. It is.
[0003]
Therefore, in this type of switch, the case of the gas switch is divided into a gas container part that houses the switch and a mechanism container part that houses the operation mechanism, and the insulating gas is stored only in the gas container. are doing.
[0004]
FIG. 10 shows a case 1 of a conventional gas switch. The case 1 shown in FIG. 10 includes a bottom plate 1a, a pair of side plates 1b and 1c rising from two opposite sides of the bottom plate 1a, and a side plate 1b. , 1c are welded to a top plate 1e disposed between the upper ends of the case plates, and side plates 1b, 1c are disposed so as to partition a space formed inside the case body. A partition plate 1d welded to the bottom plate 1a and the top plate 1e, and end plates 1h and 1i respectively closing openings 1f and 1g formed at one end and the other end in the axial direction of the case body, respectively. .
[0005]
In this case, a portion surrounded by the partition plate 1d, the side plates 1b and 1c, and the end plate 1h forms a gas container 1A, and a portion surrounded by the partition plate 1d, the side plates 1b and 1c, and the end plate 1i. A mechanism container 1B is configured. Terminal conductors respectively connected to the movable contact side and the fixed contact side of the three-phase switch housed in the gas container 1A penetrate through the side plates 1b and 1c constituting the gas container 1A, and are led out. Mounting holes 1j and 1k for mounting a bushing. This type of case is disclosed in Patent Document 1, for example.
[0006]
[Patent Document 1]
Japanese Patent No. 2983051
[0007]
[Problems to be solved by the invention]
When the gas switch case is configured as shown in FIG. 10, the bottom plate 1a, the side plates 1b and 1c, and the top plate 1e are welded to form a case main body, and then the partition plate 1d is formed inside the case main body. The inside of the case body is partitioned into a portion used as the gas container 1A and a portion used as the mechanism container 1B by welding to the bottom plate 1a, the side plates 1b and 1c, and the top plate 1e. After the components of the operating mechanism are further incorporated into the mechanism container 1B from the opening 1g, the end plates 1h and 1i are welded to the peripheral edges of the openings 1f and 1g to close the case. I was
[0008]
However, when the components of the switch and the operating mechanism are incorporated from the opening on the side surface of the case in this manner, there is a problem that workability when assembling the components in the inner part of the case is poor.
[0009]
Further, in the case of the configuration shown in FIG. 10, since the welding between the partition plate 1d and the side plates 1b and 1c is performed in a narrow space in the case main body, the welding portion between the side plates 1b and 1c and the partition plate 1d and the bottom plate 1a is formed. However, there is a problem that it is difficult to increase the reliability of the seal of the gas container because welding defects such as pinholes are easily generated in these welded portions.
[0010]
An object of the present invention is to improve the operability when assembling parts by enabling the components of the switch and the components of the operation mechanism to be incorporated with the upper ends of the gas container and the mechanism container opened. It is an object of the present invention to provide a case for a gas switch, which is made possible.
[0011]
Another object of the present invention is to provide a gas switch case that can improve the reliability of the gas container seal by using the welded portion of all the plate members constituting the gas container as the welded portion by helicopter welding. Is to do.
[0012]
[Means for Solving the Problems]
The present invention is directed to a gas switch case provided with a gas container accommodating a contact part of a switch together with an insulating gas and a mechanism container provided adjacent to the gas container to accommodate an operation mechanism of the switch. And
[0013]
In the present invention, the gas container has first and second openings that are opened in opposite directions at one end and the other end in the axial direction, and the opening directions of the first and second openings. A gas cylinder body having a third opening opened in a direction perpendicular to the gasket, and a half-tubular gas container body having both ends of the peripheral wall facing each other at the third opening; A gas container main portion having first and second protrusions bent outward from opposite ends of both ends of the peripheral wall portion and projecting in opposite directions, and fitted inside the peripheral wall portion of the gas container body. A first end plate portion having a shape that can be formed and a first side plate portion projecting from a peripheral portion of the first end plate portion in a direction perpendicular to a plate surface of the first end plate portion. It is formed in the shape, and the opening side end of the first side plate is directed to the same side as the first opening of the gas container body, inside the peripheral wall of the gas container body. In the combined state, the first side plate has a shape such that the tip of the first side plate can be fitted inside the peripheral wall of the gas container body with the first end member which is heli-welded to the peripheral edge of the first opening. A second end plate portion and a second side plate portion projecting from a peripheral portion of the second end plate portion in a direction perpendicular to a plate surface of the second end plate portion, to form a bag-like shape; The second side plate is fitted inside the peripheral wall of the gas container body with the opening end of the second side plate facing the same side as the second opening of the gas container body. Close the opening of the gas container main body constituted by the second end member whose tip is heli-welded to the peripheral edge of the second opening, the gas container main portion, and the first and second end members. A gas container lid member is formed and the peripheral edge is heli-welded to the peripheral edge of the opening of the gas container body.
[0014]
The mechanism container is formed along the outer surface of the peripheral wall of the gas container body, and a mechanism container body partly overlapped with the gas container body, and an end of the mechanism container body opposite to the gas container. An end plate portion provided so as to close the end portion, the end plate portion being opposed to the end plate portion of the second end member of the gas container, and the end portion of the mechanism container body portion on the gas container side is a gas container body portion. A mechanism container main body welded to the outer surface of the mechanism container body, and a mechanism container lid member provided to close an opening of the mechanism container body and welded to the mechanism container main body and the gas container lid member.
[0015]
Heli welding (also referred to as co-welding) is a welding method in which the ends (base materials) of two superposed plates are melted together and the molten metal is integrated, and the two plates are welded together. Are fused and integrated, so that a welded portion in which defects such as pinholes are unlikely to occur can be obtained.
[0016]
With the above-described configuration, all the plate members constituting the gas container can be joined by heli welding in which pinholes are unlikely to occur, and the welding operation of all the welding points of the gas container can be performed from the outside of the container. Therefore, the probability of occurrence of welding defects such as pinholes can be reduced as compared with the conventional gas switch case that required welding of the partition plate in a narrow space in the gas container body. Therefore, the reliability of the seal of the gas container can be improved, and a gas container free from gas leakage can be obtained.
[0017]
In addition, when configured as described above, the container body and the first and second end members are welded to form a box body having an open upper end, and the main body of the mechanism container is welded to the box body to open the upper end. After forming the equipment accommodation space, the components of the switch and the components of the operating mechanism are respectively incorporated into the opening from the upper end of the box and the upper end of the equipment accommodation space, and then the gas container lid The case can be assembled in such a procedure that the member is heli-welded to the box, and then the mechanism container lid member is welded to the mechanism container main part and the gas container lid member to close the case.
[0018]
Therefore, before the gas container lid member and the mechanism container lid member are attached, through the wide opening formed at the upper end of the box and the wide opening formed at the upper end of the device housing space, the inside of the gas container and Since the components of the switch and the components of the operation mechanism can be incorporated in the mechanism container, the work when incorporating the switch and the operation mechanism can be facilitated.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0020]
In the present invention, when assembling the components of the switch and the components of the operation mechanism in the gas container and the mechanism container, respectively, the work of assembling the components is performed by using an opening formed in the upper end of each of the gas container and the mechanism container. To be able to do through. Therefore, after assembling the components of the switch and the components of the operation mechanism in the gas container and the mechanism container, respectively, the lid member for the gas container and the lid member for the mechanism container can be attached.
[0021]
Further, in the present invention, the welding of all the welded portions of the gas container can be performed by helicopter welding from the outside of the container, thereby improving the reliability of the seal of the gas container.
[0022]
After assembling the components in the gas container and the mechanism container with the upper ends thereof opened, the bottom plate is closed in order to close the openings of both containers, for example, as shown in FIG. 1a, the side plates 1b and 1c, the partition plate 1d, and the end plates 1h and 1i are welded to form a gas container 1A and a mechanism container 1B which are separated from each other by the partition plate 1d and whose upper ends are open. After assembling the components in the gas container 1A and the mechanism container 1B, respectively, and then welding a top plate 1e1 for the gas container to the opening at the upper end of the gas container 1A as shown in FIG. As shown in FIG. 11 (C), it is conceivable to weld the top plate 1e2 for the mechanism container to the opening at the upper end of the mechanism container 1B.
In this case, as shown in FIGS. 12 (A) and (B), plate-like side plates 1h1 and 1d1 are formed on the peripheral edges of the end plate 1h and the partition plate 1d, and these plates are made into a bag shape. Thereby, the welded portion Wa of the side plate portion 1h1 of the end plate 1h of the gas container and the bottom plate 1a, the welded portion Wb of the side plate portion 1h1 of the end plate 1h and the side plates 1b, 1c, and the side plate portion of the top plate 1e1 and the end plate 1h. The welded portion Wc with 1h1 and the welded portion Wd between the top plate 1e1 and the side plate portion 1d1 of the partition plate 1d can be heli-welded, but the welded portion We between the side plate portion 1d1 of the partition plate 1d and the side plates 1b and 1c. In addition, the welded portion Wf between the side plate 1d1 of the partition plate 1d and the bottom plate 1a is fillet welded. Further, the welding of the welding portion Wf must be performed in a narrow space in the container. In such a structure, pinholes are likely to be formed in the welded portions We and Wf to be used for fillet welding, so that there is a problem that the reliability of the seal of the gas container is reduced.
[0023]
Therefore, in the present invention, the welded portion of all the plate members constituting the gas container, as a helicopter welding between the ends of the overlapped plate, so that all the welding work can be performed from the outside of the container, The case structure was devised.
[0024]
1A to 1C show a basic structure of a gas switch case 10 according to the present invention. FIG. 1A is a front view of the case, and FIG. FIG. 2C is a front vertical cross-sectional view taken along a vertical cross section as viewed from the front, and FIG. 2C is a cross-sectional view taken along line CC of FIG. FIGS. 2 (A) to 2 (C) and 3 (A) to 3 (C) are perspective views illustrating the components and structure of a gas container used in the gas switch case.
[0025]
As shown in FIGS. 1A to 1C, a gas switch case 10 according to the present invention includes a gas container 11 in which components of the switch are housed together with insulating gas, and a switch operating mechanism. And a mechanism container 12 to be accommodated.
[0026]
The gas container 11 has a gas container main portion 13 configured as shown in FIG. 2A, and first and second end members 14 and 15 shown in FIGS. 2B and 2C, respectively. As shown in FIG. 3 (C), the gas container main body 16 is configured as shown in FIG. 3 (B), and the gas container lid member 17 (see FIG. 3A) for closing the opening of the gas container main body 16. Assembled.
[0027]
As shown in FIG. 2A, the gas container main portion 13 includes a rectangular bottom plate portion 13a1, and a pair of side plate portions 13a2 and 13a3 which stand at right angles from both ends in the width direction of the bottom plate portion 13a1. First and second openings a1 and a2 having a peripheral wall portion having a U-shaped cross section and opening in opposite directions at one end and the other end in the axial direction, and a first and a second opening, respectively. A half-tubular gas container body 13a provided with a third opening a3 opened in a direction perpendicular to the opening direction, and both ends (side plate portions 13a2, 13a2) of a peripheral wall of the gas container body 13a. The first and second overhang portions 13b1 and 13b2 are bent outward at right angles from the edge portions b1 and b2 (ends opposite to the bottom plate portion 13a1 of 13a3) and project in opposite directions.
[0028]
The gas switch case according to the present invention is usually arranged with the third opening a3 of the gas container body 13a facing upward. In the present invention, the mounting posture of the case is not limited at all, but in the following description, the positional relationship of each part will be described as the basic mounting posture of the case with the third opening a3 of the gas container body 13a facing upward. I do.
[0029]
As shown in FIG. 2B, the first end member 14 is a rectangular first end plate having a shape that can be fitted inside the peripheral wall of the half-tubular gas container body 13a. A portion 14a and a first side plate portion 14b projecting from a peripheral portion of the first end plate portion in a direction perpendicular to a plate surface of the first end plate portion are formed in a bag-like shape. As shown in FIG. 3 (B), the first end member 14 is provided with a gas in which the opening side end of the first side plate portion 14b faces the same side as the first opening a1 of the gas container body 13a. The distal end of the first side plate portion 14b is fitted to the inside of the peripheral wall portion of the container body 13a, and the tip of the first side plate portion 14b is heli-welded to the peripheral edge of the first opening a1 of the gas container body.
[0030]
Further, as shown in FIG. 2C, the second end member 15 has a second end plate portion 15a having a shape capable of fitting inside the peripheral wall portion of the gas container body 13a and the second end plate portion 15a. A second side plate portion 15b projecting from the peripheral edge of the end plate portion 15a in a direction perpendicular to the plate surface of the second end plate portion is formed in a bag-like shape. As shown in FIG. 3B, the second end member 15 has the opening side end of the second side plate 15b facing the same side as the second opening a2 of the gas container body 13a. The distal end of the second side plate portion 15b is heli-welded to the peripheral edge of the second opening a2 of the gas container body in a state of being fitted inside the peripheral wall of the gas container body 13a.
[0031]
In the present embodiment, when the first and second end members 14 and 15 are attached to the gas container body 13a as described above, the portions of the first and second end members 14 and 15 near the upper ends are gaseous. The height dimensions of the first and second end members 14 and 15 are set so as to protrude from the upper end opening (third opening) of the container body 13a (see FIG. 3B).
[0032]
The gas container main body 13 and the first and second end members 14 and 15 constitute a gas container main body 16. After the components of the switch are accommodated in the gas container main body, the gas container main body 16 is closed. The opening at the upper end is closed by the gas container lid member 17 shown in FIG.
[0033]
The gas container lid member 17 is disposed between the first end member 14 and the second end member 15 of the gas container main body 16, and covers the entire third opening a3 of the gas container body 13a. , And first and second bent right and left sides of the top plate portion 17a1 in the direction perpendicular to the top plate portion from the both ends in the width direction of the top plate portion 17a1. And a half-tubular lid body 17a having side plate portions 17a2 and 17a3, and bent outward at right angles from the ends of the side plate portions 17a2 and 17a3 of the lid body portions opposite to the top plate portion 17a1. It is made of a member integrally having first and second plate-like projections 17b1 and 17b2 projecting in opposite directions.
[0034]
As shown in FIG. 3C, the gas container lid member 17 is fitted to the opening-side ends of the first and second end members 14 and 15 protruding from the openings at the upper end of the gas container body 16. The first and second overhangs 17b1 and 17b2 are superposed on the first and second overhangs 13b1 and 13b2 of the gas container main part 13.
[0035]
Then, the overlapping portions of the top plate portion 17a1 and the side plate portions 17a2 and 17a3 of the lid member 17 and the side plate portions 14b and 15b of the first and second end members 14 and 15 are heli-welded, and the first and the first The overlapping portions of the two overhang portions 17b1 and 17b2 and the overhang portions 13b1 and 13b2 of the gas container main portion are heli-welded, and the lid member 17 is joined to the gas container body 16.
[0036]
1A and 1B, W1 indicates a welded portion between the gas container body 13a and the first end plate portion 14, and W2 indicates a welded portion between the gas container body 13a and the second end plate portion 15. The weld is shown. W3 indicates a welded portion between the lid member 17 and the gas container body 16.
[0037]
As described above, according to the present invention, all the welded portions of the gas container 11 can be heli-welded between the ends of the superposed plates, and the welding operation of all the welded portions is performed from outside the container. Therefore, there is no possibility that a welding defect such as a pinhole is generated in a welded portion of the gas container, and the reliability of the seal of the gas container can be improved.
[0038]
Next, as shown in FIG. 1, the mechanism container 12 includes a mechanism container main body 18 and a mechanism container lid member 19 for closing an opening at an upper end of the mechanism container main body. It is welded to the gas container 11 in a state where it is overlapped with the end of the gas container 11.
[0039]
More specifically, the mechanism container main body 18 includes a half-section cylindrical mechanism container body 18a1 having a bottom plate 18a11 and side plates 18a12 and 18a13, and a side of the mechanism container body 18a1 opposite to the gas container 11. And a mechanism container main portion 18a provided with an end plate portion 18a2 provided so as to close the end portion of the gas container 11 and opposed to the end plate portion 15a of the second end member 15 of the gas container 11. And a projecting portion 18b provided so as to project outward from the opening at the upper end of the member.
[0040]
The mechanism container main body 18 is disposed in a state where a part of the mechanism container body 18a1 is fitted to the gas container body 13a from the outside, and the edge of the mechanism container body 18a1 is formed on the peripheral wall of the gas container body 13a. It is attached to the gas container 11 by fillet welding (welded portion W4 in FIG. 1A) to the outer surface of the portion. By attaching the mechanism container body 18 to the gas container 11 in this manner, a device accommodation space 18e is formed between the mechanism container body 18 and the end member 15 of the gas container.
[0041]
The mechanism container cover member 19 has a top plate portion 19a11 that is disposed in a state of being partially overlapped with the top plate portion 17a1 of the gas container cover member 17, and a right angle downward from both ends in the width direction of the top plate portion. A lid integrally provided with a half-tubular body portion 19a1 composed of a pair of side plate portions 19a12 and 19a13 that are bent at a right angle, and an end plate portion 19a2 that closes an end of the body portion on the side opposite to the gas container 11. It comprises a member main portion 19a and a projecting portion 19b projecting outward from an opening at the lower end of the lid member main portion 19a.
[0042]
As shown in FIG. 1 (A), the side plates 19a12 and 19a13 of the body 19a1 of the mechanism container lid member 19 have overhang portions 13b1 and 13b2 of the gas container main portion 13 and a gas container lid member 17. A notch 19c is formed for receiving the overhanging portions 17b1 and 17b2 and the ends on the mechanism case side.
[0043]
The mechanism container lid member 19 is provided with a switch operating mechanism in a device housing space 18e formed between the mechanism container body 18 and the second end member 15 of the gas container. And a part of the side plate portions 19a12 and 19a13 are overlapped with an end outer surface of the top plate portion 17a1 and an end outer surface of the side plate portions 17a2 and 17a3 of the gas container lid member 17, respectively. It is arranged so as to close the opening at the upper end of the space 18e. Then, the overhang portion 19b of the lid member 19 is fillet-welded to the overhang portion 18b of the mechanism container body 18 (see the welded portion W5 in FIGS. 1B and 1C), and the opening of the trunk portion 19a1 on the gas container side is formed. The edge portion is fillet welded to the outer surface of the gas container 11 (see a welded portion W6 in FIGS. 1A and 1B), and the lid member 19 is connected to the mechanism container main body 18 and the gas container 11.
[0044]
With the above configuration, a welded portion W1 between the gas container body 13a and the first end member 14, a welded portion W2 between the gas container body 13a and the second end member 15, and the gas container lid member 17 The welded portion W3 between the gas container main body 16 and the gas container body 16 can be formed by heli welding in which pinholes are unlikely to occur, so that the reliability of the seal of the gas container 11 in which an insulating gas such as SF6 gas is sealed at a high pressure is improved. be able to.
[0045]
In the example shown in FIG. 1, the welded portion W5 between the mechanism container lid member 19 and the mechanism container body 18 and the welded portions W4 and W6 between the mechanism container 12 and the gas container 11 are welded portions by fillet welding. However, since the inside of the mechanism container 12 is at atmospheric pressure, the welds W4 to W6 may be replaced by fillet welds.
[0046]
FIG. 1 shows the basic structure of each part of the case by simplifying the shape of each part and exaggerating the plate thickness of each part. A more specific configuration example of the gas switch case according to the present invention is shown in FIG. This is shown in FIGS. In these figures, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals as those used in FIGS. 1 to 3, respectively.
[0047]
In the examples shown in FIGS. 4 to 8, the basic structures of the gas container 11 and the mechanism container 12 are almost the same as those in the examples shown in FIGS.
[0048]
In this example, the mounting bracket 20 is attached to the top plate portion 17a1 of the gas container lid member 17, and the leg portion 21 is attached to the bottom plate portion 13a1 of the gas container body 13.
[0049]
Further, openings 13f and 13g are formed in the first side plate portion 13a2 and the second side plate portion 13a3 of the gas container body 13 for attaching bushings for penetrating a terminal conductor connected to a switch in the gas container. A shaft support 22 for supporting an operation shaft for transmitting an operation output of an operation mechanism disposed in the gas container 12 to a switch in the gas container via a bearing having an airtight holding structure is provided on a second end member 15 of the gas container. Is provided in a state where the end plate portion 15a is penetrated.
[0050]
In addition, a shaft support portion 23 for supporting a pointer shaft for checking the "on" and "off" states of the switch with an airtight holding structure, and a pressure release for releasing the pressure in the gas container when the internal pressure of the gas container 10A increases. A mounting portion (opening) 24 of the device and a hermetic plug 25 used when performing a pressure test on the gas container are provided on the end plate portion 14a of the first end member 14 of the gas container.
[0051]
A handle shaft support cylinder 26 that supports the shaft portion of the manually operated handle when the switch is manually operated is attached to the end plate portion 18a2 of the mechanism container body 18.
[0052]
The other parts are configured to have substantially the same structure as the example shown in FIG. 1, and a weld W1 between the gas container main body 13 and the first end member 14, and the gas container main body 13 and the second The welded portion W2 with the end plate portion 15 and the welded portion W3 with the gas container lid member 17 and the gas container body 13 are all heli-welded.
[0053]
Each part of the gas switch case is preferably formed of a corrosion-resistant metal material such as stainless steel.
[0054]
In the above embodiment, the cross-sectional shape of the gas container body is set such that the corners between the bottom plate 13a1 and the side plates 13a2 and 13a3 of the gas container body 13a have an angular shape. The cross-sectional shape of the gas container body 13a is not limited to the above example. For example, as shown in FIG. 9A, the shape of the corner between the bottom plate 13a1 of the gas container body 13a and the side plates 13a2 and 13a3 may be a shape with a radius.
[0055]
Further, as shown in FIG. 9 (B), tapered corner portions 13a4 and 13a5 are provided between the bottom plate portion 13a1 and the side plate portions 13a2 and 13a3 of the gas container body 13a to provide a cross-sectional shape of the gas container body. May be a bottom shape.
[0056]
Further, as shown in FIG. 9 (C), the cross-sectional shape of the bottom plate portion 13a1 of the gas container body 13a may be curved in an arc shape.
[0057]
The mechanism container main body 19 is formed to have an appropriate cross-sectional shape according to the cross-sectional shape of the gas container main body so that a part thereof can be fitted to the end of the gas container main body 16.
[0058]
【The invention's effect】
As described above, according to the present invention, all the welds of the members constituting the gas container are welded by helicoidal welding from the outside of the container. Is prevented, the airtightness of the gas container can be improved, and the reliability of the gas container can be improved.
[0059]
Further, according to the present invention, after assembling the components into the gas container and the mechanism container with the upper ends of the gas container and the mechanism container opened, the gas container cover member and the mechanism container cover member are attached. Because of this structure, it is possible to provide a case in which the components of the switch and the operating mechanism can be easily incorporated, and to improve the workability of assembling the gas switch.
[Brief description of the drawings]
FIG. 1A is a front vertical cross-sectional view showing the basic configuration of an embodiment of a gas switch case according to the present invention in which the thickness of each part is exaggerated, and FIG. FIG. 2C is a right side view, and FIG.
FIG. 2A is a perspective view illustrating a configuration example of a main part of a gas container used in the present invention, FIG. 2B is a perspective view illustrating a configuration example of a first end member of the gas container used in the present invention, (C) is a perspective view showing a configuration example of a second end member of the gas container used in the present invention.
3A is a perspective view showing a configuration example of a lid member of a gas container used in the present invention, FIG. 3B is a perspective view showing a configuration example of a gas container body, and FIG. 3C is a perspective view of FIG. It is the perspective view which showed the state which attached the cover member of (A) to the gas container main body, and assembled the gas container.
FIG. 4 is a top view showing a more specific embodiment of the present invention.
FIG. 5 is a sectional view taken along line AA of FIG. 4;
FIG. 6 is a right side view of the embodiment of FIG.
FIG. 7 is a left side view of the embodiment.
FIG. 8 is a perspective view of a main part of the embodiment.
FIGS. 9A to 9C are cross-sectional views showing various modifications of the cross-sectional shape of the main part of the gas container used in the present invention.
FIG. 10 is an exploded perspective view schematically showing the structure of a conventional gas switch case.
FIG. 11 is a perspective view for explaining an example of a structure of a case in which components can be incorporated from an opening at an upper end together with an order in which lid plates are attached to the case.
12A is a front vertical sectional view of the case shown in FIG. 11 with a cover plate of a mechanism container part removed, and FIG. 12B is a view showing a cover plate of the mechanism container part of the case shown in FIG. 11; It is a front longitudinal cross-sectional view in the attached state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... gas switch case, 11 ... gas container, 12 ... mechanism container, 13 ... gas container main part, 13a ... gas container trunk | drum, 13b1, 13b2 ... projecting part, 14 ... 1st end member, 14a ... end Plate portion, 14b ... side plate portion, 15 ... second side plate portion, 15a ... end plate portion, 15b ... side plate portion, 16 ... gas container body, 17 ... gas container lid member, 17b1, 17b2 ... overhang portion, 18 ... mechanism container body, 18b ... overhang, 19 ... lid member for mechanism container, 19b ... overhang.

Claims

In a gas switch case including a gas container accommodating the contact parts of the switch together with the insulating gas, and a mechanism container provided adjacent to the gas container to accommodate an operation mechanism of the switch,
The gas container,
First and second openings that open in opposite directions at one end and the other end in the axial direction, and a third opening that opens in a direction perpendicular to the opening direction of the first and second openings. And a half-walled cylindrical gas container body in which both ends of the peripheral wall portion face each other at the third opening, and edges of both ends of the peripheral wall portion of the gas container body. A gas container main portion having first and second projecting portions bent outward from the portion and projecting in opposite directions;
A first end plate having a shape capable of fitting inside the peripheral wall of the gas container body, and a direction perpendicular to a plate surface of the first end plate from a peripheral edge of the first end plate; The first side plate portion is formed into a bag-like shape with the first side plate portion protruding from the gas container body, and the opening side end of the first side plate portion faces the same side as the first opening portion of the gas container body. A first end member in which a tip of the first side plate portion is heli-welded to a peripheral portion of the first opening portion in a state fitted inside a peripheral wall portion of the container body;
A second end plate having a shape capable of fitting inside the peripheral wall of the gas container body, and a direction perpendicular to the plate surface of the second end plate from a peripheral edge of the second end plate; The gas is formed in a bag-like shape by a second side plate protruding from the gas container, with the opening side end of the second side plate facing the same side as the second opening of the gas container body. A second end member in which a tip of the second side plate portion is heli-welded to a peripheral portion of the second opening while being fitted inside a peripheral wall portion of the container body;
The gas container main body and the first and second end members are formed so as to close an opening of the gas container main body, and a peripheral portion is heli-welded to a peripheral portion of the opening of the gas container main body. Gas container lid member,
The mechanism container,
A mechanism container body formed along the outer surface of the peripheral wall of the gas container body and partly overlapped with the gas container body, and an end of the mechanism container body opposite to the gas container; And an end plate portion disposed opposite to an end plate portion of a second end member of the gas container, and an end of the mechanism container body on the gas container side is the gas container. A mechanism container body welded to the outer surface of the body,
A mechanism container lid member provided to close an opening of the mechanism container body and welded to the mechanism container body and the gas container lid member;
A gas switch case.