JP3606002B2

JP3606002B2 - Manufacturing, disassembling transportation and on-site assembly method for dismantling and transporting transformers

Info

Publication number: JP3606002B2
Application number: JP15561897A
Authority: JP
Inventors: 重信堀井
Original assignee: Meidensha Corp
Current assignee: Meidensha Corp
Priority date: 1997-06-13
Filing date: 1997-06-13
Publication date: 2005-01-05
Anticipated expiration: 2017-06-13
Also published as: JPH113821A

Description

【０００１】
【発明の属する技術分野】
本発明は、分解輸送形変圧器に係り、特に分解輸送形変圧器の製造（組立）、分解輸送および現地組立が容易にできるようにするための分解、輸送および現地組立方法の改良に関する。
【０００２】
【従来の技術】
変圧器は製作工場において完全な乾燥処理を行い、絶縁強度の高い絶縁油または絶縁ガスとともにタンクの内部に収納されている。これを据付現場まで輸送するにはできるだけ分解の程度を少なくし、途中で吸湿しないようにして、据付現場における再組立あるいは再乾燥の工数を省き、据付日数を短縮することが望ましい。しかし、変圧器が大形になると、輸送上の制約から、ある程度までは分解しなければならなくなる。分解の程度は、輸送方法による制限寸法と制限重量によって決まる。
【０００３】
変圧器の輸送方法としては、完全組立輸送（いわゆる全装輸送）、中身組立輸送、分解輸送の３方式に分類される。
【０００４】
まず第１の方法の完全組立輸送は、工場で完全組立して試験終了後、輸送上の支障となる特定の部品を除いたすべての付属品を取り付けたまま、全油量を充填して輸送する方法であり、現場で再組立する必要がない。
【０００５】
次に第２の方法の中身組立輸送は、工場試験終了後、輸送上の支障となるブッシング、コンサベータ、放圧管、放熱装置などの付属品を必要に応じて取り外すが、変圧器中身本体は完全組立の状態でタンクに収納し、油浸または窒素ガスなどの絶縁ガスを封入して輸送する方法である。取り外した部品は、別に輸送して据付現地で取り付ける。本体カバーを取り付けて輸送する場合と、本体カバーとは別の輸送カバーを取り付けて輸送する場合がある。窒素などの絶縁ガスを封入して輸送した場合は、据付現地で輸送カバーを取り外す前に、必ず絶縁油を下部注油弁から注油して、中の絶縁ガスを絶縁油と置き換え、変圧器中身本体を直接外気に触れさせないようにする。
【０００６】
さらに、第３の方法の分解輸送は、山地の発電所の変圧器のように輸送寸法や輸送重量の制限が厳しい場合、あるいは大容量変圧器で輸送寸法や輸送重量の制限内に入らない場合に行われるが、現地で再組立、乾燥、試験などを行う必要があり、手数がかかる。三相器の場合は、１／２または１／３の容量の三相器に分割して輸送し、タンクは別々でカバーやブッシングを共用とする方式や、単相３台または６台に分割して輸送しカバーや負荷時タップ切換装置などに共通する方式など、種々の方式がある。
【０００７】
三相変圧器の場合、高さ方向の寸法を低減するための三相五脚鉄心があるが、分解輸送形変圧器の三相五脚鉄心では各鉄心主脚を幅方向の中央で左右に分割し、上部ヨーク鉄心を取り外した４個のＵ字形単位鉄心に分割して輸送する方式がある。また、三相三脚鉄心では、上下のヨーク鉄心の磁性鋼板を抜き取り、鉄心は分解して輸送して、再度、積み上げる方法である。
【０００８】
【発明が解決しようとする課題】
従来の技術で述べた分解輸送の構造では、分解や再組立に工数がかかり、費用や変圧器の特性の点で問題点を有していた。
【０００９】
本発明は、従来の技術の有するこのような問題点に鑑みてなされたもので、下部ヨーク鉄心を分割し、この下部ヨーク鉄心を分割した部分の間には、上辺が下辺より長い台形状の磁性鋼板の両端部と前記下部ヨーク鉄心を構成する磁性鋼板の端部とをステップ状に交互にラップして積層した分割ヨーク鉄心を設けること、および鉄心締付治具を取り付けて支持台と振れ止めおよび締付ボルトにより締め付けて下部ヨーク鉄心付鉄心脚を構成して輸送することにより、鉄心の分解作業および組立時の下部ヨークの磁性鋼板の差し込み作業が容易で、現地組立工期の短縮を図ることができ、体格もコンパクトな分解輸送形変圧器の鉄心の分解、輸送および組立方法を提供することを目的とする。
【００１０】
【課題を解決するための手段】
上記の課題を解決するための手段は、剛性鋼板を積層した３本の鉄心脚を同一平面上に平行に配置し、この３本の鉄心脚の上下両端部をそれぞれ磁性鋼板を積層した上部ヨーク鉄心および下部ヨーク鉄心で接続して三相三脚鉄心を形成し、上部ヨーク鉄心および下部ヨーク鉄心をそれぞれ上部ヨーク鉄心締付金具および下部ヨーク鉄心締付金具で締め付けてなる分解輸送形変圧器の鉄心において、各鉄心脚間で下部ヨーク鉄心を分割し、この下部ヨーク鉄心の分割部を、上辺と下辺より長い台形の分割ヨーク鉄心で接合して三相三脚鉄心を形成する。これにより磁性鋼板の差し込み作業が容易になり、現地組立工期の短縮ができる。
【００１１】
また、下部ヨーク鉄心と分割ヨーク鉄心の接合部は、分割ヨーク鉄心を形成する磁性鋼板の両端部と分割した残部の下部ヨーク鉄心を形成する磁性鋼板の端部とをステップ状に交互にラップして積層して下部ヨーク鉄心を形成したものである。これにより分割鉄心の組立作業を容易にすることができる。
【００１２】
また、下部ヨーク鉄心を締め付ける下部ヨーク鉄心締付金具は、分割ヨーク鉄心を締め付ける分割ヨーク鉄心締付金具と、分割した残部の下部ヨーク鉄心を締め付ける下部外ヨーク鉄心締付金具と下部中ヨーク鉄心締付金具とを直線状に配設するとともに、締付手段で接続、分離自在に一体的に形成し、鉄心の分解輸送を容易にする。
【００１３】
また、下部中ヨーク鉄心締付金具または下部外ヨーク鉄心締付金具を取り付けたまま、支持材と振れ止めおよび締付ボルトにより締め付けて下部外ヨーク鉄心付鉄心外脚と下部中ヨーク鉄心付鉄心中脚を構成して輸送用ケースで輸送することにより、鉄心の分解作業および組立時の下部ヨークの磁性鋼板の差し込み作業が容易で、現地組立工期の短縮を図ることができ、体格もコンパクトな分解輸送形変圧器が得られる。
【００１４】
【発明の実施の形態】
以下、本発明を図面に示す実施の形態に基づいて説明する。
【００１５】
図１は本発明の実施の形態における分解輸送変圧器の三相三脚鉄心の正面図で、図１に示すように、珪素鋼板などの磁性鋼板（以下、単に磁性鋼板という）を積層した鉄心外脚２と４および鉄心中脚３を同一平面上に平行に配置し、この３本の鉄心脚の上端部および下端部を磁性鋼板を積層した上部ヨーク鉄心５および下部ヨーク鉄心９でそれぞれ磁気的に接合して三相磁気回路を形成し、三相三脚鉄心１を形成する。
【００１６】
この三相三脚鉄心１を形成するとき、本発明においては、図１に示すように、下部ヨーク鉄心９を各相の鉄心脚の間で分割し、鉄心外脚２および４に残る下部ヨーク鉄心（下部外ヨーク鉄心７）と鉄心中脚に残る下部ヨーク鉄心（下部中ヨーク鉄心６）とを、上辺が下辺より長い台形の分割ヨーク鉄心８を接合して下部ヨーク鉄心９を形成している。
【００１７】
図１では、上部ヨーク鉄心５は鉄心中脚３の上端部の中心部分で左右に２分割した形状で示したが、台形の短辺の中央部に切り込み部を設けた１枚ものの形状でも良い。また、下部中ヨーク鉄心６は図１の破線で示すように鉄心中脚３の下端部の中心部分で分割しても良い。
【００１８】
図２は本発明の実施の形態における分解輸送形変圧器の鉄心の正面図で、図２に示すように、１は図１に示した三相三脚鉄心で、磁性鋼板を積層しバインド１９によりその積層方向に締め付けた鉄心外脚２と鉄心中脚３および鉄心外脚４を同一平面上に平行に配置し、この３本の鉄心脚の上下端部をそれぞれ磁性鋼板を積層した上部ヨーク鉄心５および下部ヨーク鉄心９で接続して三相三脚鉄心を形成し、前記下部ヨーク鉄心９を鉄心脚間で分割し、この分割部を上辺が下辺より長い台形の分割ヨーク鉄心８で接合する構成とし、上部ヨーク鉄心５は両側に配設した上部ヨーク鉄心締付金具１７を鉄心締付金具用締付ボルト１８により締め付け、下部ヨーク鉄心９を構成する下部中ヨーク鉄心６と下部外ヨーク鉄心７の分割ヨーク鉄心８との各接合部側をバインド１６により締め付けたうえ、下部ヨーク鉄心９の分割ヨーク鉄心８を締め付ける分割ヨーク鉄心締付金具１３と１４と、分割した残部の下部中ヨーク鉄心６を締め付ける下部中ヨーク鉄心締付金具１１と下部外ヨーク鉄心７を締め付ける下部外ヨーク鉄心締付金具１０および１２とを直線状に配設するとともに寸法調整板２０を介してボルト等の接続手段２１により接続および分離自在に一体的に形成した下部ヨーク鉄心締付金具１５を鉄心締付金具用締付ボルト１８により締め付けて山形の三脚鉄心１を形成して、巻線（図示省略）を挿入してから、上部ヨーク鉄心５の磁性鋼板を挿入して積層して上部ヨーク鉄心５をバインド１６で締め付け、上部ヨーク鉄心締付金具１７を鉄心締付金具用締付ボルト１８により締め付けて変圧器中身本体を構成している。なお、図中Ｒで示すものはヨーク鉄心締付金具に取り付けた補強板である。
【００１９】
図３は図２のＡ−Ａ断面矢視を示すものである。図３に示すように、分割ヨーク鉄心８を構成する台形状の磁性鋼板の下部に、分割ヨーク鉄心８の下部の段階状に合わせた段階状の受け部を有する段付受け台２８Ａを設けたものである。すなわち、分割ヨーク鉄心８の両面にコア絶縁板２５を介して分割ヨーク鉄心締付金具１３（または１４）を配設し、分割ヨーク鉄心８の下面にヨーク下絶縁板２６を配置して鉄心台２７を配設し、前記分割ヨーク鉄心８と前記鉄心台２７の間の空間部に段付受け台２８Ａ（油入変圧器の場合、材質としては乾燥後に絶縁油を含浸した木材などを用いる）を配設したもので、分割ヨーク鉄心８を確実に保持できる。分割ヨーク鉄心締付金具１３（または１４）は鉄心台２７に取付ボルト２９により取付けられる。これにより下部ヨーク鉄心を強固に締め付けることができる。なお、２８Ｂは分割ヨーク鉄心８の断面上部の段階状の形状に合わせた段階状の受け部を有する段付絶縁板で、段付受け台２８Ａとともに分割ヨーク鉄心８を確実に締め付けるものである。３０は分割ヨーク鉄心内に形成した冷却ダクト部である。
【００２０】
以下、本発明の実施の形態における分解輸送形変圧器の工場製作時の各工程について、図面に基づいて説明する。
【００２１】
図４〜図７はそれぞれ本発明の実施の形態における分解輸送形変圧器の工場製作時の各工程における形態を示す正面図で、各鉄心締付金具と鉄心脚は図１に示すようにバインドで締め付けられているが、以下の図面では図示を省略してある。
【００２２】
図４は工場製作時の山形の三脚鉄心を形成した状態の正面図で、図４に示すように、まず、磁性鋼板を積層し、その長手方向に所定の間隔をあけて配置したバインド１９（図示は省略）により締め付けて形成した鉄心外脚２と鉄心中脚３および鉄心外脚４を同一平面上に平行に配置し、この３本の鉄心脚の下端に接合する下部ヨーク鉄心９の鉄心外脚２および４と鉄心中脚３の間に分割部を設け、この分割部を上辺が下辺より長い台形の分割ヨーク鉄心８で接合して、下部外ヨーク鉄心７、分割ヨーク鉄心８、下部中ヨーク鉄心６、分割ヨーク鉄心８および下部外ヨーク鉄心７の順に配置して下部ヨーク鉄心９を形成する。分割ヨーク鉄心８は正面から見て台形とし、分割ヨーク鉄心８の磁性鋼板の両端部と下部中ヨーク鉄心６の磁性鋼板の両端部および下部外ヨーク鉄心７の磁性鋼板の分割部側の端部とを、ステップ状に交互にラップして積層し、分割ヨーク鉄心８の両端部と下部中ヨーク鉄心６の両端部、および下部外ヨーク鉄心７の分割部側の端部をバインド１６（図２参照）で締め付けて下部ヨーク鉄心９を形成し、この下部ヨーク鉄心９は下部外ヨーク鉄心７を締め付ける下部外ヨーク鉄心締付金具１０、分割ヨーク鉄心８を締め付ける分割ヨーク鉄心締付金具１３、下部中ヨーク鉄心６を締め付ける下部中ヨーク鉄心締付金具１１、分割ヨーク鉄心８を締め付ける分割ヨーク鉄心締付金具１４および下部外ヨーク鉄心７を締め付ける下部外ヨーク鉄心締付金具１２とを直線状に配設して接続手段２１により接続および分離自在に一体的に形成した下部ヨーク鉄心締付金具１５を、ヨーク鉄心締付金具締付ボルト１８により締め付けて山形の三脚鉄心１を形成する（第１工程）。
【００２３】
次に、図５に示すように、前記第１工程で形成された山形の三脚鉄心１の鉄心外脚２と鉄心中脚３および鉄心外脚４に、その上部からそれぞれの巻線３１を挿入する（第２工程）。
【００２４】
次に、図６に示すように、前記第２工程で形成された状態の鉄心外脚２の上端部と鉄心中脚３の上端部の間および鉄心中脚３の上端部と鉄心外脚４の上端部の間に、上部ヨーク鉄心５の磁性鋼板を挿入して積層した上部ヨーク鉄心５をバインド１６で締め付けたうえ、上部ヨーク鉄心締付金具１７をヨーク鉄心締付金具締付ボルト１８により締め付けて三相三脚鉄心１を形成し、巻線３１を巻線締付装置（図示省略）で上下に所定圧力で締め付けてから巻線３１の結線作業を行い、変圧器中身本体３２を形成する（第３工程）。
【００２５】
次に、図７に示すように、前記第３工程で形成された変圧器中身本体３２を下タンク３３の底面に固定し、下タンク３３の上部に上タンク３４を取り付け、これら下タンク３３と上タンク３４により形成する本体タンク３５の内部に前記変圧器中身本体３２を収納し、乾燥作業後、変圧器付属品（負荷時タップ切換装置、冷却装置、温度計、防音壁などがあるが、図示は省略する）を取り付け、絶縁油または絶縁ガスなどの絶縁冷却媒体を封入して分解輸送形変圧器を形成し、完成試験を行う（第４工程）。
【００２６】
上記第１工程〜第４工程により分解輸送形変圧器の工場での製作が完了する。
【００２７】
次に、本発明の実施の形態における分解輸送形変圧器の分解時の各工程について、図面に基づいて説明する。
【００２８】
図８〜図１２はそれぞれ本発明の実施の形態における分解輸送形変圧器の分解輸送時の各工程の形態を示す説明図で、各鉄心締付金具と鉄心脚のバインドは図２に示してあるので、以下の図面では図示を省略してある。
【００２９】
図８は分解時にタンク本体から取り出した変圧器中身本体の正面図で、図８に示すように、前記第４工程による完成試験終了後、変圧器の本体タンク３５から付属部品（図示省略）と上タンク３４を取り外して、下タンク３３から鉄心と巻線などからなる変圧器中身本体３２を取り出す（分解第１工程）。
【００３０】
次に、図９に示すように、前記分解第１工程の状態の変圧器中身本体３２からヨーク鉄心締付金具締付ボルト１８を取り外して上部ヨーク鉄心締付金具１７を取り外し、バインド１６を取り外して上部ヨーク鉄心５を構成する磁性鋼板を抜き取る。上部ヨーク鉄心５の内部の冷却ダクト部３０（図示省略）も取り外しておく。この上部ヨーク鉄心５の磁性鋼板を各幅毎に積み上げ、まとめて輸送用ケースに入れ輸送可能状態にする（分解第２工程）。
【００３１】
次に、図１０に示すように、２本の鉄心外脚２と４および１本の鉄心中脚３からそれぞれ巻線３１を抜き取り、この巻線３１は、その上下に締付用当板を配置して上下から所定の圧力で締め付けて固定し、巻線輸送用ケース（図示省略）の内部に収納し、密封して絶縁ガス等を充填して輸送可能な状態とする（分解第３工程）。
【００３２】
次に、図１１に示すように、鉄心外脚２と４および鉄心中脚３および下部ヨーク鉄心９とからなる山形の三脚鉄心の各鉄心脚のそれぞれの前後左右の四隅に配設した支持部材４１を振れ止め４２により左右方向に固定し、この支持部材４１の下部は、鉄心外脚２または４では下部外ヨーク鉄心締付金具１０または１２の両外側に、鉄心中脚３では下部中ヨーク鉄心締付金具１１の両外側に配置して前記振れ止め４２を締付ボルト４３（図１３参照）により締め付けることにより鉄心外脚２と４および鉄心中脚３を、その積層方向に締め付ける（分解第４工程）。
【００３３】
次に、図１２は分解時に支持部材を取り付けた後に、分割ヨーク鉄心の磁性鋼板を抜き取る状態の正面図で、図１２において、下部ヨーク鉄心締付金具１５の鉄心締付金具用締付ボルト１８を取り外し、下部ヨーク鉄心締付金具１５を構成する下部外ヨーク鉄心締付金具１０と１２および分割ヨーク鉄心締付金具１３と１４および下部中ヨーク鉄心締付金具１１のうち、分割ヨーク鉄心締付金具１３と１４の接続手段２１を取り外してから分割ヨーク鉄心８の両端部のバインド１６を取り外して、分割鉄心ヨーク８の磁性鋼板を抜き取る（分解第５工程）。
【００３４】
ここで、分解第５工程後の下部中ヨーク鉄心６と鉄心中脚３と下部中ヨーク鉄心締付金具１１とからなる下部中ヨーク鉄心付鉄心中脚４６の状態について詳細に説明する。
【００３５】
図１３は分解輸送形変圧器の分解時に下部中ヨーク鉄心付鉄心中脚に支持部材を取り付けた状態の正面図、図１４はその側面図で、鉄心中脚３と下部中ヨーク鉄心６とを接合した下部中ヨーク鉄心付鉄心中脚４６および図示を省略してあるが鉄心外脚２または４と下部外ヨーク鉄心７とを接合した下部外ヨーク鉄心付鉄心外脚４５または４７を自立可能とするために、例えば鉄心中脚３の場合、鉄心中脚３はバインド１９によりその積層方向に締め付けられ、鉄心中脚３の下部と接合して一体に形成された下部中ヨーク鉄心付鉄心中脚４６の下部中ヨーク鉄心６の両面には、下部中ヨーク鉄心締付金具１１を配設し、その外側に配設した輸送用の支持部材４１を、振れ止め４２により正面から見て左右方向に固定し、この振れ止め４２を締付ボルト４３により鉄心中脚３の積層方向に締め付けて、下部中ヨーク鉄心付鉄心中脚４６を形成する。
【００３６】
また、下部中ヨーク鉄心締付金具１１の下部には鉄心台２７を２箇所以上設け、下部中ヨーク鉄心締付金具１１を鉄心台２７に強固に取り付けることにより下部中ヨーク鉄心付鉄心中脚４６を自立可能として輸送することができる。下部中ヨーク鉄心６の両端部はバインド１６によりその積層方向に締め付けられている。なお、最下段の締付ボルト４３は鉄心台２７の両外側を締め付けており、支持部材４１の下端は鉄心台２７の下面とともに各鉄心脚を自立させることになる。
【００３７】
下部外ヨーク鉄心７と鉄心外脚２と下部外ヨーク鉄心締付金具１０とからなる下部外ヨーク鉄心付鉄心外脚４５の状態および下部外ヨーク鉄心７と鉄心外脚４と下部外ヨーク鉄心締付金具１２とからなる下部外ヨーク鉄心付鉄心外脚４７の状態については、下部外ヨーク鉄心７の外側にヨーク鉄心の部分が無いだけで、その他は下部中ヨーク鉄心付鉄心中脚４６の状態と同様であるので、説明は省略する（分解第６工程）。
【００３８】
上記分解第１工程〜第６工程により分解輸送形変圧器の分解が完了する。
【００３９】
次に、本発明の実施の形態における分割輸送形変圧器の輸送時の各工程について、図面に基づいて説明する。
【００４０】
輸送は、前記の図８〜図１４で示した分解第１〜第６工程の工程において分解した部品を、例えば、下記（ａ）〜（ｇ）のように分けて輸送する。これらの部品はそれぞれ防湿および乾燥状態として変圧器の据付現地に輸送する。ただし、下記は一般的な分解輸送の区分を示したもので、形状、寸法および重量等により、多少の変更がある。
【００４１】
（ａ）変圧器本体付属部品（分解第１工程）
（ｂ）変圧器本体タンク（分解第１工程）
（ｃ）上部ヨーク鉄心締付金具（分解第２工程），分割ヨーク鉄心締付金具（分解第４工程），下部外ヨーク締付金具（分解第５工程）および下部中ヨーク締付金具（分解第５工程）
（ｄ）上部ヨーク鉄心用鋼板（分解第２工程）と分割ヨーク鉄心用鋼板（分解第４工程）
（ｅ）上部冷却ダクト部（分解第２工程）と下部冷却ダクト部（分解第４工程）
（ｆ）巻線（分解第３工程で説明した方法で、輸送する）
（ｇ）下部ヨーク鉄心付鉄心脚（分解第６工程）
次に、鉄心外脚２または４と下部外ヨーク鉄心７を下部外ヨーク鉄心締付金具１０または１２と前記支持部材４１などにより締め付けた下部外ヨーク鉄心付鉄心外脚４５と、鉄心中脚３と下部中ヨーク鉄心６を下部中ヨーク鉄心締付金具１１と前記支持部材４１などにより締め付けた下部中ヨーク鉄心付鉄心中脚をそれぞれ輸送用ケースの内部に収納する（輸送第１工程）。
【００４２】
図１５は本発明の実施の形態における下部中ヨーク鉄心付鉄心中脚を収納して輸送する輸送用ケースを示す斜視図で、図１５に示すように、下部中ヨーク鉄心付鉄心中脚４６の輸送用ケース５０は、鉄心中脚３と下部中ヨーク鉄心６を一体化した下部中ヨーク鉄心付鉄心中脚４６（あるいは鉄心外脚２または４と下部外ヨーク鉄心７を一体化した下部外ヨーク鉄心付鉄心外脚４５または４７）の下部中ヨーク鉄心６の部分を収納する輸送用下ケース５１と、鉄心中脚３（あるいは鉄心外脚２または４）を収納する輸送用上ケース５２とからなっている。
【００４３】
輸送用下ケース５１の上部の開口部にはフランジ５３が設けられており、その側面には、輸送用下ケース５１を補強するためと横倒しにしたときの支持点を兼用する補強部材５５が取り付けられている。また、輸送用上ケース５２の下部の開口部にはフランジ５４が設けられており、その側面には、輸送用上ケース５２を補強するためと横倒しにしたときの支持点を兼用する補強部材５６が取り付けられている。輸送用下ケース５１のフランジ５３と、輸送用上ケース５２のフランジ５４との間に、パッキンなどのシール部材５７を配設してボルト締めするようになっている。前記補強部材５５および５６は横倒輸送の場合の輸送用ケース５０の支持に利用できる。
【００４４】
図１６は下部中ヨーク鉄心付鉄心中脚を収納して輸送する輸送用下ケースの内部底面の平面図、図１７は図１６のＡ−Ａ断面矢視図で、図１６および図１７に示すように、底面を構成する底板５８に鉄心台取付板５９を取り付け、鉄心脚は図１３および図１４で説明した状態で輸送用下ケース５１の内部に入れる。この鉄心台取付板５９には、鉄心台２７をはめ込むための取付溝６０が開けられており、この取付溝６０に鉄心台２７をはめ込み、取付ボルト６１により鉄心台２７は鉄心台取付板５９に固定される。また、この鉄心台取付板５９には４本の支持部材４１の下端をはめ込むための取付穴６２もあけられており、この取付穴６２に支持部材４１の下端をはめ込んで取り付け固定する構造になっている。なお、鉄心台２７の取り付け構造としては、輸送用下ケースの内部底面に取付座を設けて固定してもよい。
【００４５】
鉄心外脚（２または４）または鉄心中脚３の下部に、それぞれ下部外ヨーク鉄心７または下部中ヨーク鉄心６を取り付けて、下部外ヨーク鉄心締付金具１０または１２または下部中ヨーク鉄心締付金具１１と支持部材４１により、鉄心外脚（２または４）、または鉄心中脚３をその積層方向に締め付けたそれぞれ下部外ヨーク鉄心付鉄心外脚（４５または４７）、または下部中ヨーク鉄心付鉄心中脚４６の下部外ヨーク鉄心７または下部中ヨーク鉄心６の部分を、輸送用下ケース５１の内部に収納し、この下部外ヨーク鉄心付鉄心外脚（４５または４７）、または下部中ヨーク鉄心付鉄心中脚４６の上部から輸送用上ケース５２をかぶせて、この輸送用上ケース５２のフランジ５４と輸送用下ケース５１のフランジ５３とをパッキンなどのシール部材５７を介して接合して輸送用ケース５０を構成し、この輸送用ケース５０を起立状態または横倒し状態にして、その内部に絶縁油、乾燥空気または絶縁ガスを封入して輸送するようにしたものである。
【００４６】
巻線、各鉄心締付金具、磁性鋼板等をそれぞれ輸送用ケースに入れ、本体タンクや変圧器付属部品等も別に輸送する（輸送第２工程）。
【００４７】
以上のようにして、分解輸送形変圧器は輸送される。
【００４８】
次に、本発明の分解輸送形変圧器の据付現地における再組立工程を説明する。
【００４９】
図１８は本発明の実施の形態における分割輸送形変圧器の現地組立時の最初の状態を示す側面図、図１９は現地組立時の分割ヨーク鉄心の磁性鋼板の挿入後の状態を示す側面図で、図１８および図１９に示すように、据付現地において、輸送用ケースから取り出した２組の下部外ヨーク鉄心付鉄心外脚４５と４７および１組の下部中ヨーク鉄心付鉄心中脚４６を支持部材４１、振れ止め４２および締付ボルト４３をつけたまま、鉄心外脚２、鉄心中脚３、鉄心外脚４の順に水平に平行して所定の間隔をあけて配置して、下部外ヨーク鉄心締付金具１０と下部中ヨーク鉄心締付金具１１との間に分割ヨーク鉄心締付金具１３を、下部中ヨーク鉄心締付金具１１と下部外ヨーク鉄心締付金具１２の間に分割ヨーク鉄心締付金具１４のそれぞれの接続部の間を調整板２０により鉄心外脚２と４、および鉄心中脚３を所定の間隔に調整して配置する（再組立第１工程）。
【００５０】
そして、分割ヨーク鉄心８の磁性鋼板を下部外ヨーク鉄心７と下部中ヨーク鉄心６の間に、ステップ状に交互にラップして差し込んで積層する。分割ヨーク鉄心８の冷却ダクト部３０も所定の位置に挿入する（再組立第２工程）。
【００５１】
次に、図２０に示すように、分割ヨーク鉄心８の両端部をバインド１６により磁性鋼板の積層方向に締め付けてから、下部外ヨーク鉄心締付金具１０および１２と下部中ヨーク鉄心締付金具１１と分割ヨーク鉄心締付金具１３または１４で構成する下部ヨーク鉄心締付金具１５を下部ヨーク鉄心９の両側に配設して鉄心締付金具用締付ボルト１８を締め付けて下部ヨーク鉄心９を締め付け、輸送用の支持部材を取り外して、下部ヨーク鉄心９と鉄心外脚２および３と鉄心中脚３とで山形の三脚鉄心１を形成する（再組立第３工程）。
【００５２】
次に、図２１に示すように、山形の三脚鉄心１のそれぞれの鉄心脚２、３および４の上部から巻線３１を挿入する（再組立第４工程）。
【００５３】
次に、図２２に示すように、上部ヨーク鉄心５の磁性鋼板と上部ヨーク鉄心用の冷却ダクト部３０を鉄心脚の上端部に挿入して積層して上部ヨーク鉄心締付金具１７を取り付けて上部ヨーク鉄心５を締め付けて変圧器中身本体３２を形成する（再組立第５工程）。
【００５４】
次に、図２３に示すように、巻線３１の締付や結線作業等を行って変圧器中身本体３２を形成させて、変圧器中身本体３２を変圧器本体タンク３５の内部に収納して乾燥作業を行い、付属部品を取り付け、絶縁油または絶縁ガスを封入して分解輸送形変圧器を組み立てる（再組立第６工程）。
【００５５】
以上の工程により、本発明の分解輸送形変圧器の組立が完了し、その後、現地試験を行う。
【００５６】
【発明の効果】
本発明の分解輸送形変圧器は、次に記載する効果を奏する。
【００５７】
（１）変圧器の三相三脚鉄心の下部ヨーク鉄心を分割し、この下部ヨーク鉄心を分割した部分の間には、上辺が下辺より長い台形状の分割ヨーク鉄心を設け、この分割ヨーク鉄心を形成する磁性鋼板の両端部と前記下部ヨーク鉄心を形成する磁性鋼板の端部を、ステップ状に交互にラップして積層して下部ヨーク鉄心を構成したことにより、磁性鋼板を差し込むときに、磁性鋼板のせり込みを防止でき、下部が上部より短い台形である磁性鋼板の差し込み作業が長方形の場合に比べて容易になり、現地組立工期の短縮ができる。
【００５８】
（２）下部ヨーク鉄心部分を締め付ける締付金具は、前記分割ヨーク鉄心を除いた部分を締め付ける３組の鉄心脚下部ヨーク締付金具の間に、前記分割ヨーク鉄心を締め付ける２個の分割ヨーク鉄心締付金具を配置して接続して一体化した下部ヨーク鉄心締付金具により形成され、この鉄心脚下部ヨーク締付金具の接続部側には磁性鋼板の差し込み作業前の調整板による位置合わせをするので、鉄心を分割して輸送したり、磁性鋼板を差し込む作業も容易にできる。
【００５９】
（３）台形状の磁性鋼板で構成した分割ヨーク鉄心の下部に、分割ヨーク鉄心の下部の段階状に合わせた段階状の受け部を有する段付受け台を設けたので、差し込んだ磁性鋼板が下部へ脱落しない構造となっている。また、下部ヨーク鉄心の変形防止になり、作業治具として利用できる。
【００６０】
（４）分割ヨーク鉄心を構成する台形状の磁性鋼板の積層方向の内部に設ける冷却ダクト部を取り外し可能としたので、鉄心を分割して輸送したり、磁性鋼板を差し込む作業も容易にできる。
【００６１】
（５）鉄心脚および分割ヨーク鉄心をバインドにより締め付ける構造とし、分割ヨーク鉄心のバインドは、分解輸送時に取り外し、磁性鋼板を抜き取って輸送し、現地で差し込んで組立後、再度、バインドで締め付けるようにしたことにより、磁性鋼板の引き抜き作業と差し込み作業に対する積み上げ方向の必要クリアランスが確保され、分割ヨーク鉄心の分解および組立作業が容易となり、鉄心を分割して輸送したり、磁性鋼板を差し込む作業も容易にできる。
【００６２】
（６）鉄心中脚の下部に下部中ヨーク鉄心を、鉄心外脚の下部に下部外ヨーク鉄心を接続して一体に形成し、下部外ヨーク鉄心締付金具と下部中ヨーク鉄心締付金具を取り付けて支持部材と振れ止めと締付ボルトにより締め付けて形成した下部ヨーク鉄心付鉄心脚の鉄心締付治具の下部に、鉄心台を２箇所以上設けて鉄心脚を構成したことにより、分割した鉄心脚の自立を可能とする支持台となり、前記支持部材、振れ止めおよび締付ボルトにより固定した輸送用下ケースへ入れる時の吊上用治具としても利用できる。
【００６３】
（７）鉄心外脚と下部外ヨーク鉄心とを一体化した下部外ヨーク鉄心付鉄心外脚、または鉄心中脚と下部中ヨーク鉄心を一体化した下部中ヨーク鉄心付鉄心中脚の輸送用ケースは、それぞれ下部外ヨーク鉄心付鉄心外脚または下部中ヨーク鉄心付鉄心中脚の下部を収納する前記輸送用下ケースと、鉄心脚の上部を収納する輸送用上ケースとに分け、前記支持部材等と鉄心台により固定したままで、輸送ケースの内部に収納し、輸送用上ケースを鉄心脚の上部にかぶせて輸送用上ケースと輸送用下ケースをフランジで接合して輸送用ケースを構成し、この輸送用ケースを起立または横倒しにして、その内部に絶縁油または絶縁ガスを封入して輸送できるようにしたので、輸送が容易になり、現地組立作業の工期が短縮できる。
【００６４】
（８）輸送用ケースの補強部材は、横倒輸送の場合に支持点になり、輸送が容易になり現地組立作業の工期が短縮できる。
【図面の簡単な説明】
【図１】本発明の実施の形態における分解輸送形変圧器の三相三脚鉄心の正面図。
【図２】本発明の実施の形態における分解輸送形変圧器の鉄心の正面図。
【図３】本発明の実施の形態における分解輸送形変圧器の鉄心の分割ヨーク鉄心の断面側面図。
【図４】本発明の実施の形態における分解輸送形変圧器の工場製作時の第１工程の説明図。
【図５】本発明の実施の形態における分解輸送形変圧器の工場製作時の第２工程の説明図。
【図６】本発明の実施の形態における分解輸送形変圧器の工場製作時の第３工程の説明図。
【図７】本発明の実施の形態における分解輸送形変圧器の工場製作時の第４工程の説明図。
【図８】本発明の実施の形態における分割輸送形変圧器の分解時の第１工程の説明図。
【図９】本発明の実施の形態における分割輸送形変圧器の分解時の第２工程の説明図。
【図１０】本発明の実施の形態における分割輸送形変圧器の分解時の第３工程の説明図。
【図１１】本発明の実施の形態における分割輸送形変圧器の分解時の第４工程の説明図。
【図１２】本発明の実施の形態における分割輸送形変圧器の分解時の第５工程の説明図。
【図１３】本発明の実施の形態における分割輸送形変圧器の分解時に下部中ヨーク鉄心付鉄心中脚に支持部材を取り付けた状態の正面図。
【図１４】本発明の実施の形態における分解輸送形変圧器の分解時に下部中ヨーク鉄心付鉄心中脚に支持部材を取り付けた状態の側面図。
【図１５】本発明の実施の形態における分解輸送形変圧器の鉄心の下部中ヨーク鉄心付鉄心中脚または下部外ヨーク鉄心付鉄心外脚を収納して輸送する輸送用ケースの斜視図。
【図１６】本発明の実施の形態における分解輸送形変圧器の鉄心の下部中ヨーク鉄心付鉄心中脚または下部外ヨーク鉄心付鉄心外脚を収納して輸送する輸送用下ケースの内部底面図。
【図１７】図１６のＡ−Ａ断面矢視図。
【図１８】本発明の実施の形態における分割輸送形変圧器の現地組立時の第１工程の説明図。
【図１９】本発明の実施の形態における分割輸送形変圧器の現地組立時の第２工程の説明図。
【図２０】本発明の実施の形態における分割輸送形変圧器の現地組立時の第３工程の説明図。
【図２１】本発明の実施の形態における分割輸送形変圧器の現地組立時の第４工程の説明図。
【図２２】本発明の実施の形態における分割輸送形変圧器の現地組立時の第５工程の説明図。
【図２３】本発明の実施の形態における分割輸送形変圧器の現地組立時の第６工程の説明図。
【符号の説明】
１…三相三脚鉄心
２，４…鉄心外脚
３…鉄心中脚
５…上部ヨーク鉄心
６…下部中ヨーク鉄心
７…下部外ヨーク鉄心
８…分割ヨーク鉄心
９…下部ヨーク鉄心
１０，１２…下部外ヨーク鉄心締付金具
１１…下部中ヨーク鉄心締付金具
１３，１４…分割ヨーク鉄心締付金具
１５…下部ヨーク鉄心締付金具
１６…バインド（ヨーク鉄心締付用）
１７…上部ヨーク鉄心締付金具
１８…鉄心締付金具用締付ボルト
１９…バインド（鉄心脚締付用）
２０…寸法調整板
２１…接続手段
２４…分割ヨーク鉄心締付金具側板
２５…コア絶縁板
２６…ヨーク下絶縁板
２７…鉄心台
２８Ａ…段付受け台
２８Ｂ…段付絶縁板
２９…取付ボルト
３０…冷却ダクト部
３１…巻線
３２…変圧器中身本体
３３…下タンク
３４…上タンク
３５…本体タンク
４１…支持部材
４２…振れ止め
４３…締付ボルト
４４…取付ボルト
４５…下部外ヨーク鉄心付鉄心外脚
４６…下部中ヨーク鉄心付鉄心中脚
４７…下部外ヨーク鉄心付鉄心外脚
５０…輸送用ケース
５１…輸送用下ケース
５２…輸送用上ケース
５３…輸送用下ケースのフランジ
５４…輸送用上ケースのフランジ
５５…輸送用下ケースの補強部材
５６…輸送用上ケースの補強部材
５７…シール材
５８…輸送用下ケースの底板
５９…輸送用下ケースの鉄心台取付板
６０…鉄心台取付溝
６１…取付ボルト
６２…支持部材取付穴[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disassembled transport type transformer, and more particularly to an improvement of a disassembling, transporting and on-site assembly method for facilitating manufacture (assembling), disassembling transport and on-site assembly of the disassembled transport type transformer.
[0002]
[Prior art]
The transformer is completely dried at the manufacturing plant, and is stored in the tank together with insulating oil or insulating gas having high insulation strength. In order to transport this to the installation site, it is desirable to reduce the degree of disassembly as much as possible and prevent moisture absorption on the way, thereby reducing the number of steps for reassembly or re-drying at the installation site and shortening the installation days. However, when a transformer becomes large, it must be disassembled to some extent due to transportation restrictions. The degree of decomposition is determined by the size and weight limit of the transportation method.
[0003]
Transformer transportation methods are classified into three methods: complete assembly transportation (so-called full packaging transportation), contents assembly transportation, and disassembly transportation.
[0004]
First of all, in the fully assembled transportation of the first method, after the complete assembly at the factory and the completion of the test, the entire oil amount is filled with all the accessories except for the specific parts that impede transportation being transported. And does not require reassembly on site.
[0005]
Next, in the second method of content assembly and transportation, after the factory test is completed, accessories such as bushings, conservators, pressure relief pipes, and heat dissipation devices that may interfere with transportation are removed as necessary. This is a method of storing in a tank in a fully assembled state and enclosing an insulating gas such as oil immersion or nitrogen gas for transport. The removed parts will be transported separately and installed at the installation site. There are cases where the main body cover is attached for transportation and cases where the main body cover is attached for transportation. When transporting with an insulating gas such as nitrogen, before removing the transport cover at the installation site, be sure to lubricate the insulating oil from the lower lubrication valve and replace the insulating gas with insulating oil. Avoid direct contact with outside air.
[0006]
Furthermore, in the case of disassembly and transportation in the third method, when the restrictions on transportation dimensions and transportation weight are severe, such as transformers in mountainous power plants, or when they do not fall within the restrictions on transportation dimensions and transportation weight with large-capacity transformers. However, it is necessary to carry out reassembly, drying, and testing at the site, which is troublesome. In the case of a three-phase device, it is divided and transported to a three-phase device with a capacity of 1/2 or 1/3, and the tank is divided into a single-phase three or six units with a separate cover and bushing. There are various methods such as a method that is common to the transport and cover and the tap switching device when loaded.
[0007]
In the case of a three-phase transformer, there is a three-phase five-legged core to reduce the dimension in the height direction, but in the three-phase five-legged core of an exploded transport type transformer, each core main leg is placed at the center in the width direction on the left and right. There is a method of dividing and transporting into four U-shaped unit cores that are divided and the upper yoke core is removed. In a three-phase tripod iron core, the magnetic steel plates of the upper and lower yoke iron cores are extracted, and the iron cores are disassembled and transported, and then stacked again.
[0008]
[Problems to be solved by the invention]
The disassembly and transport structure described in the prior art requires man-hours for disassembly and reassembly, and has problems in terms of cost and characteristics of the transformer.
[0009]
The present invention has been made in view of such problems of the prior art. The lower yoke iron core is divided, and a trapezoidal shape in which the upper side is longer than the lower side between the divided portions of the lower yoke core. Providing a split yoke iron core in which both ends of the magnetic steel plate and the end of the magnetic steel plate constituting the lower yoke iron core are alternately wrapped in a step-like manner, and attaching the iron core tightening jig and swinging with the support base By constructing and transporting a core leg with a lower yoke iron core by tightening with a stop and tightening bolt, it is easy to disassemble the iron core and insert the magnetic steel plate of the lower yoke during assembly, and shorten the on-site assembly period An object of the present invention is to provide a method for disassembling, transporting and assembling an iron core of a disassembled and transportable transformer that can be constructed and is compact in size.
[0010]
[Means for Solving the Problems]
Means for solving the above-mentioned problem is that an upper yoke in which three iron core legs laminated with rigid steel plates are arranged in parallel on the same plane, and upper and lower ends of the three iron core legs are laminated with magnetic steel plates, respectively. An iron core of an exploded transport transformer, which is connected by an iron core and a lower yoke iron core to form a three-phase tripod iron core, and the upper yoke iron core and the lower yoke iron core are fastened by the upper yoke iron core clamp and the lower yoke iron clamp, respectively. The lower yoke core is divided between the core legs, and the divided portion of the lower yoke core is joined with a trapezoidal split yoke core longer than the upper side and the lower side to form a three-phase tripod core. This facilitates the insertion work of the magnetic steel sheet and shortens the local assembly time.
[0011]
In addition, the joint between the lower yoke core and the split yoke core wraps both ends of the magnetic steel sheet forming the split yoke core and the end of the magnetic steel sheet forming the remaining lower yoke core in a stepped manner. The lower yoke iron core is formed by stacking. Thereby, the assembly work of a split iron core can be made easy.
[0012]
In addition, the lower yoke core clamps that fasten the lower yoke core are divided into the split yoke core clamps that clamp the split yoke core, the lower outer yoke core clamps that clamp the remaining lower yoke core, and the lower middle yoke core clamp. Attaching brackets are arranged in a straight line, and are integrally formed so that they can be connected and separated by fastening means to facilitate disassembly and transportation of the iron core.
[0013]
Also, with the lower middle yoke core clamp or lower outer yoke core clamp attached, tighten with the support material, steady rest, and tightening bolts to tighten the outer leg with the lower outer yoke core and the lower middle yoke core By constructing the legs and transporting them in a transport case, it is easy to disassemble the iron core and insert the magnetic steel plate of the lower yoke at the time of assembly, shorten the on-site assembly period, and have a compact physique A transport transformer is obtained.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
[0015]
FIG. 1 is a front view of a three-phase tripod core of an exploded transport transformer according to an embodiment of the present invention. As shown in FIG. 1, a magnetic steel plate such as a silicon steel plate (hereinafter simply referred to as a magnetic steel plate) is laminated outside the iron core. The legs 2 and 4 and the iron core middle leg 3 are arranged in parallel on the same plane, and the upper and lower ends of the three iron core legs are respectively magnetically formed by an upper yoke iron core 5 and a lower yoke iron core 9 in which magnetic steel plates are laminated. Are joined together to form a three-phase magnetic circuit, and a three-phase tripod core 1 is formed.
[0016]
When the three-phase tripod core 1 is formed, in the present invention, as shown in FIG. 1, the lower yoke core 9 is divided between the core legs of the respective phases, and the lower yoke cores remaining on the outer core legs 2 and 4 are separated. The lower yoke iron core 9 is formed by joining the (lower outer yoke iron core 7) and the lower yoke iron core (lower middle iron iron core 6) remaining on the iron core middle leg to the trapezoidal split yoke iron core 8 whose upper side is longer than the lower side. .
[0017]
In FIG. 1, the upper yoke iron core 5 is shown in a shape that is divided into left and right at the center portion of the upper end of the iron core middle leg 3. . Further, the lower middle yoke iron core 6 may be divided at the central portion of the lower end portion of the iron core middle leg 3 as shown by a broken line in FIG.
[0018]
FIG. 2 is a front view of an iron core of an exploded transport transformer according to an embodiment of the present invention. As shown in FIG. 2, 1 is a three-phase tripod iron core shown in FIG. The core outer leg 2, the core middle leg 3 and the core outer leg 4 clamped in the laminating direction are arranged in parallel on the same plane, and the upper and lower ends of the three core legs are respectively laminated with magnetic steel plates. 5 and a lower yoke iron core 9 are connected to form a three-phase tripod iron core, the lower yoke iron core 9 is divided between iron core legs, and the divided portion is joined by a trapezoidal divided yoke iron core 8 whose upper side is longer than the lower side. The upper yoke core 5 is fastened with the upper yoke core fastening fittings 17 disposed on both sides by the fastening bolts 18 for the iron core fastening fittings, and the lower middle yoke core 6 and the lower outer yoke core 7 constituting the lower yoke core 9. Split yoke iron core 8 The joint yoke side is tightened by the bind 16, and the split yoke iron core fastening brackets 13 and 14 for fastening the split yoke iron core 8 of the lower yoke iron core 9 and the lower middle yoke iron core fastening for fastening the remaining lower middle yoke iron core 6 are tightened. The lower outer yoke iron core fastening fittings 10 and 12 for fastening the metal fitting 11 and the lower outer yoke iron core 7 are arranged in a straight line, and are connected to and separated from each other by a connecting means 21 such as a bolt via a dimension adjusting plate 20. The lower yoke iron core clamp 15 formed in the above is tightened with the iron clamp bolts 18 to form the angled tripod iron core 1 and the winding (not shown) is inserted. A magnetic steel plate is inserted and stacked, and the upper yoke core 5 is tightened with the bind 16, and the upper yoke core tightening bracket 17 is tightened with the tightening bolt 18 for the core tightening bracket. Put to constitute a transformer contents body. In addition, what is shown by R in the figure is a reinforcing plate attached to the yoke iron core clamp.
[0019]
FIG. 3 shows an AA cross-sectional arrow view of FIG. As shown in FIG. 3, a stepped receiving base 28 </ b> A having a stepped receiving portion that matches the stepped shape of the lower part of the split yoke iron core 8 is provided at the lower part of the trapezoidal magnetic steel plate constituting the split yoke iron core 8. Is. That is, the split yoke iron core fastening bracket 13 (or 14) is disposed on both surfaces of the split yoke iron core 8 via the core insulating plate 25, and the lower yoke insulating plate 26 is disposed on the lower surface of the split yoke iron core 8, thereby 27, and a stepped pedestal 28A in the space between the divided yoke core 8 and the iron core 27 (in the case of an oil-filled transformer, a material such as wood impregnated with insulating oil after drying is used as the material) The split yoke iron core 8 can be reliably held. The divided yoke iron core fastening fitting 13 (or 14) is attached to the iron core base 27 with attachment bolts 29. Thereby, the lower yoke iron core can be firmly tightened. Reference numeral 28B denotes a stepped insulating plate having a stepped receiving portion that matches the stepped shape of the upper portion of the section of the divided yoke core 8, and securely clamps the divided yoke core 8 together with the stepped receiving base 28A. Reference numeral 30 denotes a cooling duct portion formed in the divided yoke iron core.
[0020]
Hereafter, each process at the time of the factory manufacture of the decomposition | disassembly transport type | mold transformer in embodiment of this invention is demonstrated based on drawing.
[0021]
FIGS. 4 to 7 are front views showing forms in each process at the time of manufacturing the disassembled transport transformer according to the embodiment of the present invention, and each iron core clamp and iron legs are bound as shown in FIG. However, the illustration is omitted in the following drawings.
[0022]
FIG. 4 is a front view showing a state in which a mountain-shaped tripod iron core is formed at the time of factory manufacture. As shown in FIG. 4, first, magnetic steel plates are laminated, and a bind 19 (with a predetermined interval in the longitudinal direction) The iron core outer leg 2, the iron core middle leg 3, and the iron core outer leg 4, which are formed by tightening in the same manner, are arranged in parallel on the same plane, and the iron core of the lower yoke iron core 9 joined to the lower ends of the three iron core legs. A split portion is provided between the outer legs 2 and 4 and the iron core middle leg 3, and this split portion is joined by a trapezoidal split yoke core 8 whose upper side is longer than the lower side, so that a lower outer yoke core 7, a split yoke core 8, The lower yoke iron core 9 is formed by arranging the middle yoke iron core 6, the divided yoke iron core 8, and the lower outer yoke iron core 7 in this order. The split yoke iron core 8 has a trapezoidal shape when viewed from the front, both end portions of the magnetic steel plate of the split yoke core 8, both end portions of the magnetic steel plate of the lower middle yoke core 6, and end portions on the split portion side of the magnetic steel plate of the lower outer yoke core 7. Are alternately wrapped in a step-like manner, and both ends of the split yoke iron core 8, both ends of the lower middle yoke core 6, and the end of the lower outer yoke core 7 on the split portion side are bound 16 (FIG. 2). The lower yoke iron core 9 is formed by tightening the lower outer yoke iron core 9, and the lower outer yoke iron core 9 is joined to the lower outer yoke iron core fastening fitting 10, the divided yoke iron core fastening fitting 13 is used to fasten the divided yoke iron core 8, and the lower part. Lower middle yoke iron core fastening bracket 11 for fastening the middle yoke iron core 6, lower yoke iron core fastening fitting 14 for fastening the divided yoke iron core 8, and lower outer yoke iron core for fastening the lower outer yoke iron core 7 A lower yoke iron core clamp 15, which is integrally formed so as to be connected and separated by the connecting means 21 in a straight line with the bracket 12, is tightened with a yoke iron clamp clamp bolt 18 to form a mountain tripod. The iron core 1 is formed (first step).
[0023]
Next, as shown in FIG. 5, the respective windings 31 are inserted into the outer core legs 2, the inner core legs 3 and the outer core legs 4 of the mountain-shaped tripod core 1 formed in the first step from above. (Second step).
[0024]
Next, as shown in FIG. 6, between the upper end portion of the iron core outer leg 2 and the upper end portion of the iron core middle leg 3 in the state formed in the second step, and between the upper end portion of the iron core middle leg 3 and the iron core outer leg 4. The upper yoke core 5, which is formed by inserting the magnetic steel plates of the upper yoke core 5 between the upper end portions of the upper yoke core and tightening the upper yoke iron core 5 with the bind 16, The three-phase tripod iron core 1 is formed by tightening, and the winding 31 is tightened up and down with a winding tightening device (not shown) at a predetermined pressure, and then the winding 31 is connected to form a transformer body 32. (Third step).
[0025]
Next, as shown in FIG. 7, the transformer main body 32 formed in the third step is fixed to the bottom surface of the lower tank 33, and the upper tank 34 is attached to the upper portion of the lower tank 33. The transformer main body 32 is housed in the main body tank 35 formed by the upper tank 34, and after drying work, there are transformer accessories (load switching device, cooling device, thermometer, soundproof wall, etc. (The illustration is omitted) is attached, and an insulating cooling medium such as insulating oil or insulating gas is enclosed to form an exploded transport transformer, and a completion test is performed (fourth step).
[0026]
The first to fourth steps complete the production of the dismantling and transporting transformer at the factory.
[0027]
Next, each process at the time of decomposition | disassembly of the decomposition | disassembly transport type | mold transformer in embodiment of this invention is demonstrated based on drawing.
[0028]
FIGS. 8 to 12 are explanatory views showing the forms of the respective steps at the time of disassembly and transportation of the disassembly and transport type transformer according to the embodiment of the present invention, and the binding between the core fastening hardware and the core leg is shown in FIG. Therefore, illustration is omitted in the following drawings.
[0029]
FIG. 8 is a front view of the transformer main body taken out from the tank main body at the time of disassembly. As shown in FIG. 8, after completion of the completion test in the fourth step, an accessory (not shown) is taken from the main tank 35 of the transformer. The upper tank 34 is removed, and the transformer contents main body 32 composed of an iron core and a winding is taken out from the lower tank 33 (disassembly first step).
[0030]
Next, as shown in FIG. 9, the yoke iron core clamp bolt 18 is removed from the transformer main body 32 in the disassembled first step, the upper yoke core clamp 17 is removed, and the bind 16 is removed. The magnetic steel plate constituting the upper yoke core 5 is extracted. The cooling duct 30 (not shown) inside the upper yoke core 5 is also removed. The magnetic steel plates of the upper yoke core 5 are piled up for each width and put together in a transport case to be transportable (disassembly second step).
[0031]
Next, as shown in FIG. 10, the windings 31 are extracted from the two core outer legs 2 and 4 and the one core middle leg 3, respectively. Arranged, fastened and fixed with a predetermined pressure from above and below, housed in a winding transport case (not shown), sealed, filled with insulating gas, etc. to be transportable (disassembly third step) ).
[0032]
Next, as shown in FIG. 11, support members disposed at the four front and rear left and right corners of each of the iron core legs of the mountain-shaped tripod iron core comprising the iron core outer legs 2 and 4, the iron core middle leg 3 and the lower yoke iron core 9. 41 is fixed in the left-right direction by a steady rest 42, and the lower part of the support member 41 is disposed on both outer sides of the lower outer yoke core fastening bracket 10 or 12 in the outer core leg 2 or 4, and the lower middle yoke in the core center leg 3. The outer core legs 2 and 4 and the inner core legs 3 are tightened in the stacking direction by disposing them on both outer sides of the iron core clamp 11 and tightening the steady rest 42 with tightening bolts 43 (see FIG. 13) (disassembly). (4th process).
[0033]
Next, FIG. 12 is a front view showing a state in which the magnetic steel plate of the split yoke iron core is pulled out after the support member is attached at the time of disassembly. In FIG. 12, the tightening bolt 18 for the iron core fastener of the lower yoke iron core fastener 15 is shown. Of the lower outer yoke iron core fasteners 10 and 12 and the divided yoke iron core fasteners 13 and 14 and the lower middle yoke iron core fastener 11 constituting the lower yoke iron core fastener 15. After the connection means 21 of the metal fittings 13 and 14 is removed, the binds 16 at both ends of the divided yoke iron core 8 are removed, and the magnetic steel sheet of the divided iron core yoke 8 is extracted (disassembly fifth step).
[0034]
Here, the state of the core middle leg 46 with the lower middle yoke iron core composed of the lower middle yoke iron core 6, the iron core middle leg 3, and the lower middle yoke iron core fastening bracket 11 after the fifth disassembly step will be described.
[0035]
FIG. 13 is a front view of a state in which a support member is attached to the core middle leg with the lower middle yoke iron core when the disassembled transport transformer is disassembled, and FIG. 14 is a side view of the core middle leg 3 and the lower middle yoke iron core 6. The core middle leg 46 with the lower middle yoke iron core joined and the core outer leg 45 or 47 with the lower outer yoke iron core joined to the lower outer yoke iron core 7 or the lower outer yoke iron core 7 can be made independent. For example, in the case of the iron core middle leg 3, the iron core middle leg 3 is fastened in the stacking direction by the binding 19 and joined to the lower part of the iron core middle leg 3 and integrally formed with the middle middle leg with the lower middle yoke iron core. A lower middle yoke iron core fastening bracket 11 is provided on both surfaces of the lower middle yoke iron core 46, and a transport support member 41 arranged on the outer side of the lower middle yoke iron core 6 is laterally viewed from the front by a steady rest 42. Secure and tighten this steady rest 42 Tighten the stacking direction of the core center leg 3 by belt 43 to form the lower in the yoke core with core middle leg 46.
[0036]
Further, two or more iron bases 27 are provided at the lower part of the lower middle yoke iron core fastening bracket 11, and the lower middle yoke iron core fastening metal fitting 11 is firmly attached to the iron core base 27, whereby the lower middle yoke iron core inner leg 46. Can be transported as self-supporting. Both ends of the lower middle yoke iron core 6 are fastened in the stacking direction by the binds 16. The lowermost tightening bolts 43 fasten both outer sides of the iron core 27, and the lower end of the support member 41 makes each iron leg stand independently together with the lower surface of the iron core 27.
[0037]
State of the core outer leg 45 with the lower outer yoke iron core consisting of the lower outer yoke iron core 7, the iron core outer leg 2, and the lower outer yoke iron core fastening bracket 10, and the lower outer yoke iron core 7, the iron core outer leg 4, and the lower outer yoke iron core tightening The state of the core outer leg 47 with the lower outer yoke iron core consisting of the attachment 12 is only that there is no portion of the yoke core outside the lower outer yoke iron core 7, and the other is the state of the core inner leg 46 with the lower middle yoke iron core. Since it is the same, description is abbreviate | omitted (disassembly 6th process).
[0038]
The disassembly of the disassembly and transport type transformer is completed by the above disassembly first to sixth steps.
[0039]
Next, each process at the time of transportation of the divided transport type transformer in the embodiment of the present invention will be described based on the drawings.
[0040]
For transportation, the parts disassembled in the steps of the first to sixth disassembly steps shown in FIGS. 8 to 14 are divided and transported as shown in the following (a) to (g), for example. Each of these parts is transported to the site where the transformer is installed as moisture-proof and dry. However, the following shows the general categories of disassembly and transportation, and there are some changes depending on the shape, dimensions, weight, etc.
[0041]
(A) Transformer body accessory (disassembly first step)
(B) Transformer body tank (disassembly first step)
(C) Upper yoke core clamp (disassembly second step), split yoke core clamp (disassembly fourth step), lower outer yoke clamp (disassembly fifth step), and lower middle yoke clamp (disassembly) (5th process)
(D) Steel plate for upper yoke core (disassembly second step) and steel plate for split yoke core (disassembly fourth step)
(E) Upper cooling duct part (disassembly second step) and lower cooling duct part (disassembly fourth step)
(F) Winding (transported by the method described in the third disassembly step)
(G) Core leg with lower yoke iron core (disassembly 6th process)
Next, the core outer leg 45 with the lower outer yoke iron core and the core outer leg 3 with the lower outer yoke core fastened by the lower outer yoke iron core fastening bracket 10 or 12 and the support member 41 or the like. The lower middle yoke iron core 6 with the lower middle yoke iron core fastening bracket 11 and the support member 41 are housed in the transport case (first transportation step).
[0042]
FIG. 15 is a perspective view showing a transport case for storing and transporting the core middle legs with the lower middle yoke iron core according to the embodiment of the present invention. As shown in FIG. The transport case 50 includes a core middle leg 46 with a lower middle yoke iron core in which the iron core middle leg 3 and the lower middle yoke iron core 6 are integrated (or a lower outer yoke in which the iron outer leg 2 or 4 and the lower outer yoke iron core 7 are integrated. From a lower case 51 for transporting the portion of the lower middle yoke iron core 6 of the iron core outer leg 45 or 47) and an upper case 52 for transporting the core middle leg 3 (or the outer core leg 2 or 4). It has become.
[0043]
A flange 53 is provided at the opening of the upper part of the lower case 51 for transportation, and a reinforcing member 55 that serves as a supporting point when it is laid down is attached to the side surface of the flange 53 to reinforce the lower case 51 for transportation. It has been. Further, a flange 54 is provided at the lower opening of the transport upper case 52, and a reinforcing member 56 that doubles as a support point when the transport upper case 52 is laid sideways is provided on its side surface. Is attached. A sealing member 57 such as packing is disposed between the flange 53 of the lower transport case 51 and the flange 54 of the upper transport case 52 and is bolted. The reinforcing members 55 and 56 can be used to support the transport case 50 in the case of sideways transport.
[0044]
FIG. 16 is a plan view of the inner bottom surface of the lower case for transportation in which the middle core legs with the lower middle yoke iron core are housed and transported. FIG. As described above, the iron base mounting plate 59 is attached to the bottom plate 58 constituting the bottom surface, and the iron core legs are put into the lower case 51 for transportation in the state described with reference to FIGS. A mounting groove 60 for fitting the iron core 27 is formed in the iron core mounting plate 59. The iron core 27 is fitted into the mounting groove 60, and the iron core 27 is attached to the iron core mounting plate 59 by mounting bolts 61. Fixed. Further, the iron plate mounting plate 59 is also provided with mounting holes 62 for fitting the lower ends of the four support members 41, and the lower end of the support member 41 is fitted into the mounting holes 62 to be fixed. ing. In addition, as a mounting structure of the iron core stand 27, a mounting seat may be provided and fixed on the inner bottom surface of the lower case for transportation.
[0045]
The lower outer yoke iron core 7 or the lower middle yoke iron core 6 is attached to the lower part of the iron core outer leg (2 or 4) or the iron core middle leg 3, respectively, and the lower outer yoke iron core fastening bracket 10 or 12 or the lower middle yoke iron core is fastened. With the metal core 11 and the support member 41, the iron core outer leg (2 or 4) or the iron core middle leg 3 is fastened in the laminating direction, respectively, with the lower outer yoke iron core outer leg (45 or 47), or with the lower middle yoke iron core. A portion of the lower outer yoke iron core 7 or the lower middle yoke iron core 6 of the iron core middle leg 46 is housed in the lower case 51 for transportation, and the outer iron leg with the lower outer yoke iron core (45 or 47), or the lower middle yoke. The upper case 52 for transportation is covered from the upper part of the iron core middle leg 46 with the iron core, and the flange 54 of the upper case 52 for transportation and the flange 53 of the lower case 51 for transportation are connected with a seal such as packing. The transport case 50 is configured by joining via the cable member 57, and the transport case 50 is placed in an upright state or a sideways state, and is filled with insulating oil, dry air, or insulating gas inside and transported. It is a thing.
[0046]
Winding, each iron core clamp, magnetic steel plate, etc. are put in a transport case, and the main tank and transformer accessories are transported separately (transportation second step).
[0047]
As described above, the disassembled transport type transformer is transported.
[0048]
Next, the reassembly process at the installation site of the disassembled transport type transformer of the present invention will be described.
[0049]
FIG. 18 is a side view showing an initial state of the divided transport transformer according to the embodiment of the present invention at the time of on-site assembly, and FIG. 19 is a side view showing a state after insertion of the magnetic steel sheet of the divided yoke core at the time of on-site assembly. As shown in FIGS. 18 and 19, on the site of installation, two sets of the core outer legs 45 and 47 with the lower outer yoke iron core and one set of the core inner legs 46 with the lower middle yoke core taken out from the transport case are installed. With the support member 41, the steady rest 42 and the tightening bolt 43 attached, the outer core outer leg 2, the inner core middle leg 3, and the outer core leg 4 are arranged in parallel with a predetermined interval in the order of the outer outer legs. A split yoke iron core clamp 13 is provided between the yoke iron core clamp 10 and the lower middle yoke iron core clamp 11, and a split yoke is provided between the lower middle yoke iron core clamp 11 and the lower outer yoke iron core clamp 12. Each connection of the iron core clamp 14 Between parts and the core outer legs 2 by adjusting plate 20 4, and the core center leg 3 arranged to adjust a predetermined interval (reassembling first step).
[0050]
Then, the magnetic steel plates of the split yoke iron core 8 are alternately wrapped in a step shape between the lower outer yoke iron core 7 and the lower middle yoke iron core 6 and stacked. The cooling duct portion 30 of the divided yoke iron core 8 is also inserted into a predetermined position (reassembly second step).
[0051]
Next, as shown in FIG. 20, both ends of the split yoke iron core 8 are fastened in the stacking direction of the magnetic steel plates by the binding 16, and then the lower outer yoke iron core fastening fittings 10 and 12 and the lower middle yoke iron core fastening fitting 11 are provided. And the lower yoke core fastening brackets 15 constituted by the split yoke core fastening brackets 13 or 14 are disposed on both sides of the lower yoke core 9 and the fastening bolts 18 for the core fastening brackets are tightened to tighten the lower yoke core 9 Then, the transport support member is removed, and the lower yoke iron core 9, the iron core outer legs 2 and 3, and the iron core middle leg 3 form the angled tripod iron core 1 (reassembly third step).
[0052]
Next, as shown in FIG. 21, the winding 31 is inserted from the upper part of each of the iron core legs 2, 3 and 4 of the mountain-shaped tripod iron core 1 (reassembly fourth step).
[0053]
Next, as shown in FIG. 22, the magnetic steel plate of the upper yoke core 5 and the cooling duct portion 30 for the upper yoke core are inserted into the upper end of the core leg and stacked, and the upper yoke core fastening bracket 17 is attached. The upper yoke core 5 is tightened to form the transformer main body 32 (reassembly fifth step).
[0054]
Next, as shown in FIG. 23, the winding body 31 is tightened or connected to form a transformer body 32, and the transformer body 32 is stored in the transformer body tank 35. A drying operation is performed, attachment parts are attached, insulating oil or insulating gas is enclosed, and a disassembled transport type transformer is assembled (reassembly sixth step).
[0055]
Through the above process, the assembly of the disassembly and transport transformer of the present invention is completed, and then a field test is performed.
[0056]
【The invention's effect】
The disassembled transport type transformer of the present invention has the following effects.
[0057]
(1) The lower yoke core of the three-phase tripod core of the transformer is divided, and a trapezoidal split yoke core whose upper side is longer than the lower side is provided between the divided portions of the lower yoke core. By forming the lower yoke core by laminating the both ends of the magnetic steel sheet to be formed and the end of the magnetic steel sheet forming the lower yoke core alternately in a step shape, The steel plate can be prevented from slipping in, and the work of inserting the magnetic steel plate whose lower part is shorter than the upper part is easier than in the case of a rectangular shape, and the on-site assembly period can be shortened.
[0058]
(2) The tightening bracket for tightening the lower yoke core portion includes two split yoke cores for tightening the split yoke core between the three sets of core leg lower yoke tightening brackets for tightening the portion excluding the split yoke core. The lower yoke core clamp is formed by connecting and connecting the clamps, and the connection of the lower yoke clamps of the core legs is aligned with the adjustment plate before inserting the magnetic steel plate. Therefore, the work of dividing the iron core and transporting it or inserting the magnetic steel sheet can be facilitated.
[0059]
(3) Since the stepped cradle having a stepped receiving portion corresponding to the stepped shape of the lower part of the split yoke core is provided at the lower part of the split yoke iron core composed of the trapezoidal magnetic steel plate, It has a structure that does not fall off to the bottom. Further, the lower yoke iron core is prevented from being deformed, and can be used as a work jig.
[0060]
(4) Since the cooling duct portion provided in the stacking direction of the trapezoidal magnetic steel sheet constituting the split yoke iron core can be removed, the work of dividing the iron core and transporting it or inserting the magnetic steel sheet can be facilitated.
[0061]
(5) The core leg and the split yoke iron core are tightened by binding. The split yoke core binding is removed at the time of disassembly and transported, the magnetic steel sheet is pulled out and transported, inserted on site, assembled, and then tightened again by binding. As a result, the necessary clearance in the stacking direction for the magnetic steel sheet extraction and insertion operations is ensured, and the split yoke iron core can be easily disassembled and assembled, and the iron core can be transported separately and the magnetic steel sheet can be easily inserted. Can be.
[0062]
(6) A lower middle yoke iron core is connected to the lower part of the iron core middle leg, and a lower outer yoke iron core is connected to the lower part of the iron core outer leg to form a single unit. The lower outer yoke iron core fastening bracket and the lower middle yoke iron core fastening metal fitting The core leg is divided by providing two or more core bases at the bottom of the core tightening jig of the core leg with the lower yoke iron core formed by attaching and tightening with the support member, the steady rest and the tightening bolt. It becomes a support base that enables the iron core legs to be self-supporting, and can also be used as a lifting jig when being put into the lower transport case fixed by the support member, the steady rest and the fastening bolt.
[0063]
(7) A case for transporting an iron core outer leg with a lower outer yoke iron core integrated with an iron core outer leg and a lower outer yoke iron core, or an iron core middle leg with a lower middle yoke iron core integrated with an iron core middle leg and a lower middle yoke iron core Are divided into the lower case for transportation that accommodates the lower part of the iron core outer leg with the lower outer yoke iron core or the lower middle yoke iron core and the upper case for transportation that accommodates the upper part of the iron core leg. , Etc., and is stored inside the transport case, and the upper case for transport is placed on the upper part of the core leg, and the upper case for transport and the lower case for transport are joined by a flange to form the transport case. In addition, since the transportation case is erected or laid down and sealed with insulating oil or insulating gas inside, the transportation can be facilitated and the construction period of the field assembly work can be shortened.
[0064]
(8) The reinforcing member of the transport case serves as a support point in the case of sideways transport, which facilitates transport and shortens the construction period of local assembly work.
[Brief description of the drawings]
FIG. 1 is a front view of a three-phase tripod iron core of an exploded transport transformer according to an embodiment of the present invention.
FIG. 2 is a front view of an iron core of an exploded transport transformer according to an embodiment of the present invention.
FIG. 3 is a cross-sectional side view of a split yoke iron core of an iron core of an exploded transport transformer according to an embodiment of the present invention.
FIG. 4 is an explanatory diagram of a first step at the time of manufacturing a disassembled transport type transformer in the embodiment of the present invention.
FIG. 5 is an explanatory diagram of a second step at the time of manufacturing the disassembled transport transformer in the embodiment of the present invention.
FIG. 6 is an explanatory diagram of a third step at the time of factory manufacture of the disassembled transport type transformer in the embodiment of the present invention.
FIG. 7 is an explanatory diagram of a fourth step at the time of factory manufacture of the disassembled transport type transformer in the embodiment of the present invention.
FIG. 8 is an explanatory diagram of a first step at the time of disassembling the divisional transport transformer in the embodiment of the present invention.
FIG. 9 is an explanatory diagram of a second step at the time of disassembling the divisional transport transformer in the embodiment of the present invention.
FIG. 10 is an explanatory diagram of a third step at the time of disassembling the split transport transformer in the embodiment of the present invention.
FIG. 11 is an explanatory view of a fourth step at the time of disassembling the divisional transport type transformer in the embodiment of the present invention.
FIG. 12 is an explanatory diagram of a fifth step at the time of disassembling the divided transport type transformer in the embodiment of the present invention.
FIG. 13 is a front view showing a state in which a support member is attached to a core middle leg with a lower middle yoke iron core at the time of disassembly of the divided transport type transformer in the embodiment of the present invention.
FIG. 14 is a side view showing a state in which a support member is attached to an iron core middle leg with a lower middle yoke iron core at the time of disassembly of the disassembled transport type transformer in the embodiment of the present invention.
FIG. 15 is a perspective view of a transport case that accommodates and transports a core middle leg with a lower middle yoke iron core or a core outer leg with a lower outer yoke iron core of an iron core of an exploded transport transformer according to an embodiment of the present invention.
FIG. 16 is an internal bottom view of a lower case for transportation that houses and transports a core middle leg with a lower middle yoke iron core or a core outer leg with a lower outer yoke iron core of an iron core of an exploded transport transformer according to an embodiment of the present invention. .
17 is a cross-sectional view taken along the line AA in FIG.
FIG. 18 is an explanatory diagram of a first process at the time of on-site assembly of the divided transport type transformer according to the embodiment of the present invention.
FIG. 19 is an explanatory diagram of a second step at the time of on-site assembly of the divided transport transformer according to the embodiment of the present invention.
FIG. 20 is an explanatory diagram of a third step at the time of on-site assembly of the divided transport transformer in the embodiment of the present invention.
FIG. 21 is an explanatory diagram of a fourth step at the time of on-site assembly of the divided transport transformer in the embodiment of the present invention.
FIG. 22 is an explanatory diagram of a fifth step at the time of on-site assembly of the divided transport type transformer according to the embodiment of the present invention.
FIG. 23 is an explanatory diagram of a sixth step at the time of on-site assembly of the divided transport transformer in the embodiment of the present invention.
[Explanation of symbols]
1 ... Three-phase tripod iron core
2, 4 ... Iron core outer legs
3 ... Iron core middle leg
5… Upper yoke iron core
6 ... Lower middle yoke iron core
7 ... Lower outer yoke iron core
8 ... split yoke iron core
9 ... Lower yoke iron core
10, 12 ... Lower outer yoke iron core clamp
11 ... Lower middle yoke iron core clamp
13, 14 ... Split yoke iron core clamp
15 ... Lower yoke iron core clamp
16 ... Bind (for tightening the yoke core)
17… Upper yoke core clamp
18 ... Tightening bolts for iron core clamps
19 ... Bind (for core leg tightening)
20 ... Dimension adjustment plate
21 ... Connection means
24 ... Split yoke iron core fastening bracket side plate
25. Core insulation plate
26. Insulating plate under yoke
27 ... Iron core stand
28A ... Stepped cradle
28B ... Stepped insulation board
29 ... Mounting bolt
30 ... Cooling duct part
31 ... Winding
32 ... Transformer contents
33 ... Lower tank
34 ... Upper tank
35 ... Body tank
41. Support member
42 ... rest
43 ... Tightening bolt
44 ... Mounting bolt
45 ... Iron core outer leg with lower outer yoke iron core
46 ... Iron core with lower middle yoke iron core
47 ... Iron core outer leg with lower outer yoke iron core
50 ... Transport case
51 ... Transport lower case
52 ... Upper case for transport
53 ... Flange of lower case for transportation
54 ... Upper case flange for transport
55. Reinforcing member for lower case for transportation
56. Reinforcing member for upper case for transportation
57 ... Sealing material
58 ... Bottom plate of lower case for transportation
59 ... Iron core mounting plate for lower case for transportation
60 ... Iron core mounting groove
61 ... Mounting bolt
62 ... Support member mounting hole

Claims

An iron core middle leg is placed between the two outer core legs laminated with rigid steel plates, and the lower end of each iron core outer leg and iron core middle leg is joined with a lower yoke iron core laminated with magnetic steel plates. Tighten the iron core with the lower yoke core clamp, wind the winding around each core leg, join the upper end of the core leg with the upper yoke core laminated with magnetic steel plates, and upper with the upper yoke core clamp In the manufacturing method of the transformer formed by tightening the yoke iron core, forming the transformer body consisting of the iron core and windings, etc., and housing the transformer body inside the body tank,
The core outer legs of the lower yoke iron core formed by fastening the laminated iron core outer legs and the iron core middle legs with bindings arranged at predetermined intervals in the longitudinal direction and joining the lower ends of the iron core legs. A split part is provided between the center leg of the iron core and the split part is joined with a trapezoidal split yoke core whose upper side is longer than the lower side, and the lower outer yoke core, the split yoke core, the lower middle yoke core, the split yoke core and the lower outer core The lower iron core is formed by the yoke core, and both ends of the magnetic steel plate of the lower middle yoke core and the one end of the lower outer yoke core on the divided portion side of the magnetic steel plate are joined. The lower yoke is fixed by binding the ends of the split yoke core, the ends of the lower middle yoke core, and the end of the lower outer yoke core on the split side. This lower yoke core forms an iron core, which consists of a lower outer yoke core clamp that fastens the lower outer yoke core, a split yoke core clamp that tightens the split yoke core, and a lower middle yoke core clamp that tightens the lower middle yoke core. The split yoke iron core clamps that fasten the split yoke iron core and the lower outer yoke iron core clamps that tighten the lower outer yoke core are arranged in a straight line in this order, and are connected and separated by connecting means via a dimension adjustment plate. A lower yoke iron core fastening bracket formed by means of a tightening bolt for the iron core fastening bracket to create a mountain-shaped tripod iron core;
Inserting a winding into each of the iron core outer legs and the iron core middle legs;
Insert the magnetic steel plate that constitutes the upper yoke iron core between the outer legs of the iron core and the upper part of the iron core core, and tighten the upper yoke iron cores that are stacked, and tighten the upper yoke iron core fasteners for the iron core fasteners. Tightening with bolts to form the transformer body;
A method of manufacturing a disassembled transport type transformer, comprising a step of storing the main body of the transformer in a main body tank composed of a lower tank and an upper tank or a lower tank and an intermediate tank and an upper tank.

After the completion test of the disassembled transport type transformer,
Removing the upper tank of the main body tank and taking out the main body of the transformer from the lower tank of the main body tank;
Removing the fastening bolts for the iron core tightening bracket, removing the upper yoke iron core tightening bracket and the binding, and extracting the magnetic steel plate constituting the upper yoke iron core;
Extracting the windings from the outer core legs and the inner core legs,
The support members which are arranged at the four corners of the front, rear, left and right of each of the mountain-shaped tripod cores composed of the outer core legs, the middle core legs and the lower yoke iron core are fixed in the left and right directions by the steady rests. The lower part is placed on both outer sides of the lower outer yoke core fastening bracket for the iron core outer leg and on the outer side of the lower middle yoke iron core fastening bracket for the iron core center leg, and the above described steady rest is tightened with the tightening bolt. Tightening the legs in the stacking direction;
Remove the bolts for the core clamps of the lower yoke core clamp, and remove the lower outer yoke core clamp, the split yoke core clamp and the lower middle yoke core clamp that make up the lower yoke core clamp. Among them, the step of removing the split yoke iron core fastening bracket and then removing the split yoke iron core binding, and extracting the magnetic steel plate of the split iron core yoke,
Iron core outer legs and lower outer yoke iron cores are clamped by the lower outer yoke iron core fastening bracket and the supporting member, and the outer core legs with the lower outer yoke iron core, and the iron core middle legs and the lower middle yoke iron core are joined by the lower middle yoke iron core fastening bracket. A step of storing the core middle legs with the lower middle yoke iron core tightened by the support member, respectively, inside the transport case;
Disassembling and transporting method of disassembling and transporting type transformer, characterized in that it comprises the steps of placing windings, iron core clamps, magnetic steel plates, etc. in their respective transport cases and transporting the main body tank and transformer accessories separately. .

The upper yoke core clamp, the magnetic steel plate of the upper yoke core, the winding section, and the lower outer yoke core with the lower outer yoke core attached to the lower part of the outer core leg, and the outer core are stacked with the support member. The lower outer yoke core with the lower outer yoke core tightened in the direction, the lower middle yoke core fastening bracket with the lower middle yoke iron core attached to the lower part of the core intermediate leg, and the lower part with the core intermediate leg tightened in the stacking direction by the support member The intermediate yoke core with intermediate yoke core, the split yoke core clamp, the magnetic steel plate of the split yoke core, the upper yoke cooling duct portion and the lower yoke cooling duct portion, which are transported separately. A method of disassembling and transporting the dismantling and transporting transformer according to 2.

The lower outer yoke core portion of the lower outer yoke core and the lower middle yoke core portion of the lower middle yoke core are housed in a lower case for transportation, respectively. Cover the upper part of the outer core leg of the leg or the upper part of the outer core part of the core with the middle yoke iron core with the lower middle yoke iron core, and the upper case for transportation and the lower case for transportation are airtight through the flange. 4. A transport case is formed by joining to the transport case, the transport case is placed in an upright state or a sideways state, and insulating oil, dry air, or insulating gas is enclosed in the transport case and transported. The method of disassembling and transporting the described dismantling and transporting transformer.

At the installation site of the dismantling transport transformer,
The two outer core legs with the lower outer yoke iron core and one lower middle yoke iron core middle leg are arranged in parallel in the order of the iron core outer leg, the iron core middle leg, and the iron core outer leg. The lower yoke core clamp and the split yoke core clamp that make up the lower yoke core clamp are connected to each connection side of the lower yoke core clamp and the split yoke core clamp and the lower middle yoke core clamp. After adjusting and arranging the iron core legs at a predetermined interval using a dimension adjusting plate between the part sides, once the split yoke iron core fastening bracket is removed and the magnetic steel plates of the divided yoke iron cores are respectively The lower yoke yoke core and the lower middle yoke core are alternately wrapped in steps and stacked, and the split yoke iron core is fastened by binding, and then the split yoke iron core clamp is attached to the lower outer yoke clamp. And lower middle yaw Attach the lower yoke clamp that is connected and integrated with the clamp, tighten the clamp bolt for the iron clamp, and tighten the magnetic steel plate in the stacking direction with the lower yoke core, the outer core leg and the core middle leg. Forming a Yamagata tripod core;
Inserting the winding part from the upper part of each core leg;
Insert the magnetic steel plate of the upper yoke core between the upper ends of the core legs, stack them, tighten them by binding, attach the upper yoke core clamp and tighten the clamp bolt for the core clamp to form the upper yoke core And forming a transformer body,
After carrying out tightening and wiring work of the winding part, it is stored in the transformer main body tank and dried, and finally it is assembled by sealing with insulating oil or insulating gas. How to assemble a transformer.