JPH0766045A - Gas insulation transformer - Google Patents

Abstract

PURPOSE:To prevent mixture of water content and foreign objects into a transformer body and to enhance reliability by housing a tank for transportation in the transformer body as well as a pressure container tank. CONSTITUTION:A tank 5 for transportation is installed at an insertion trestle, a horizontal type pressure container 1B and a middle trestle are installed, and then a transformer body 2 is pulled into the pressure container 1B along with the transportation tank 5. Then, the transportation tank 5 is positioned on a support member 13 provided at the lower part of the pressure container 1B. After the lead-in of the tank 5 for transportation into the horizontal-type pressure container 1B is completed, a blind lid 14 of the tank 5 for transportation is removed and lead connection and insulation gas sealing, etc., are executed, thus completing installation and hence preventing mixture of water and foreign objects into the transformer body and obtaining a durable and reliable gas insulation transformer.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、ＳＦ₆ ガスのような絶
縁ガスを充気するタンク内に、鉄心およびコイルから成
る変圧器本体を収納するガス絶縁変圧器に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated transformer in which a transformer body composed of an iron core and a coil is housed in a tank filled with an insulating gas such as SF ₆ gas.

【０００２】[0002]

【従来の技術】最近、防災上の理由から油入変圧器に変
わる不燃性の変圧器として、絶縁油の代わりに不燃性の
絶縁ガス（例えばＳＦ₆ ガス）を冷却および絶縁の媒体
として用いるいわゆるガス絶縁変圧器が開発され、数１
０ＭＶＡ程度のものまで実用化されている。2. Description of the Related Art Recently, as a nonflammable transformer which is replaced by an oil-filled transformer for disaster prevention, a so-called nonflammable insulating gas (for example, SF ₆ gas) is used as a cooling and insulating medium instead of the insulating oil. Gas insulated transformer developed, number 1
It has been put to practical use up to about 0 MVA.

【０００３】このようなガス絶縁変圧器においては近
年、変圧器容量、電圧共に上昇し、２００〜３００ＭＶ
Ａ、２７５〜５００ｋＶ級の大容量、高電圧化の要請が
増加している。In such a gas-insulated transformer, in recent years, both the transformer capacity and the voltage have risen to 200 to 300 MV.
A, the demand for large capacity of 275 to 500 kV class and high voltage is increasing.

【０００４】したがって、高電圧、大容量のガス絶縁変
圧器としては、耐電圧、冷却性能面から、ガス圧を２ｋ
ｇｆ／ｃｍ² Ｇ以上、例えば４ｋｇｆ／ｃｍ² Ｇ程度と
して、タンクを圧力容器とする必要がある。Therefore, as a high-voltage, large-capacity gas-insulated transformer, a gas pressure of 2 k is required in terms of withstand voltage and cooling performance.
It is necessary to use a tank as a pressure vessel with gf / cm ² G or more, for example, about 4 kgf / cm ² G.

【０００５】その一例として、図６，図７にそれぞれタ
ンク１Ａを縦型圧力容器、タンク１Ｂを横型圧力容器と
し、コイル２Ａおよび鉄心２Ｂから成る変圧器本体２を
収納したガス絶縁変圧器の平面図を示すが、圧力容器と
しては円筒形状の横型圧力容器とするのが一般的であ
る。As an example thereof, the plane of a gas-insulated transformer in which a tank 1A is a vertical pressure vessel and a tank 1B is a horizontal pressure vessel and a transformer body 2 composed of a coil 2A and an iron core 2B is housed is shown in FIGS. As shown in the figure, a cylindrical horizontal pressure vessel is generally used as the pressure vessel.

【０００６】これは、図６からも分かるように、コイル
外径寸法ａに比べ鉄心寸法ｂは１．５〜２倍程度大きく
なるため、球形状の縦形圧力容器ではデッドスペースが
増加し、外径寸法が大きくなるというデメリットがある
ことによる。As can be seen from FIG. 6, this is because the iron core dimension b is 1.5 to 2 times larger than the coil outer diameter dimension a, so that the dead space increases in the spherical vertical pressure vessel, and This is due to the disadvantage that the diameter size becomes large.

【０００７】したがって、図７に示すように横型圧力容
器として縦フランジ３を設け、変圧器本体２を横から引
き込む構造にした方がコンパクトな設計ができるという
メリットがある。Therefore, it is advantageous to provide the vertical flange 3 as a horizontal pressure vessel as shown in FIG. 7 and to draw the transformer main body 2 from the side, which has a merit of compact design.

【０００８】[0008]

【発明が解決しようとする課題】ところで、以上のよう
な構成を有する変圧器を遠隔地へ輸送する場合、貨車輸
送、トレーラ輸送が一般的に用いられる。これらの輸送
においては、一般に図８に示すように輸送限界４があ
り、タンク１Ｂの外径に寸法制限が加わる。一方、変圧
器容量の増加と共に変圧器本体２の形状が大きくなる
と、絶縁距離などを考慮するためにタンク形状が大きく
なり、輸送限界４の寸法内に収めることが困難になる。By the way, when transporting a transformer having the above structure to a remote place, freight car transportation and trailer transportation are generally used. In these transportations, generally, there is a transportation limit 4 as shown in FIG. 8, and the outer diameter of the tank 1B is limited in size. On the other hand, when the size of the transformer main body 2 becomes large as the transformer capacity increases, the size of the tank becomes large in consideration of the insulation distance and the like, which makes it difficult to fit within the size of the transport limit 4.

【０００９】そこで、図９に示すように輸送時のガス圧
が運転時と比較して低くて良いことを利用して、輸送限
界寸法に合わせた輸送用タンク５で変圧器本体２を輸送
し、現地で横型圧力容器１Ｂに引き込む方法がとられて
いる。Therefore, as shown in FIG. 9, by utilizing the fact that the gas pressure during transportation may be lower than that during operation, the transformer main body 2 is transported by the transportation tank 5 that matches the transportation limit dimension. The method of drawing into the horizontal pressure vessel 1B is adopted locally.

【００１０】図１０は、現地で横型圧力容器としたタン
ク１Ｂに、変圧器本体２を引き込む方法を示したもので
あるが、輸送用タンク５は、一般的にタンク長手方向の
強度が同じになるように横補強ビーム６を取り付け、上
部に水平フランジ７を設けた構造とするのが一般的であ
る。FIG. 10 shows a method of pulling the transformer main body 2 into the tank 1B which is a horizontal pressure vessel on site, but the transport tank 5 generally has the same strength in the longitudinal direction of the tank. The horizontal reinforcing beam 6 is attached so that a horizontal flange 7 is provided on the upper portion.

【００１１】このような構造を採用する場合、現地で
は、同図に矢印で示すように変圧器本体２を一旦門型ク
レーン８等で輸送用タンク５の外に吊りだし、挿入架台
９の上にのせ、横型圧力容器としたタンク１Ｂに引き込
む方法がとられる。When such a structure is adopted, the transformer main body 2 is temporarily hung outside the transportation tank 5 by the gate crane 8 or the like as shown by the arrow in FIG. Then, a method of pulling it into the tank 1B which is a horizontal pressure container is adopted.

【００１２】ところが、この方法では変圧器本体２が気
中に曝されることとなり、気中の水分、塵の混入、ま
た、引き込み作業に伴う異物の発生とそのコイル内への
侵入などの恐れがあり、作業中の防塵、吸湿などの対策
が複雑化するという欠点があった。本発明は、上記欠点
を解決するためになされたもので、その目的は、信頼性
の高いガス絶縁変圧器を提供することにある。However, in this method, the transformer main body 2 is exposed to the air, and there is a risk that moisture and dust in the air may be mixed in, and foreign matter may be generated during the drawing operation and the foreign matter may enter the coil. However, there is a drawback that measures against dust and moisture absorption during work become complicated. The present invention has been made to solve the above-mentioned drawbacks, and an object thereof is to provide a highly reliable gas-insulated transformer.

【００１３】[0013]

【課題を解決するための手段】本発明は、コイルおよび
鉄心より成る変圧器本体を輸送用タンクに収納して輸送
し、現地で輸送用タンクとともに所定の圧力容器タンク
に収納し、その後輸送用タンクからの中身の引き出しを
リード部のみに限定し絶縁ガスを封入するようにしたこ
とを特徴とする。SUMMARY OF THE INVENTION According to the present invention, a transformer main body composed of a coil and an iron core is stored in a transportation tank for transportation, and it is stored locally in a predetermined pressure vessel tank together with the transportation tank, and then transported. It is characterized in that the content of the tank is pulled out only to the lead portion and the insulating gas is filled therein.

【００１４】[0014]

【作用】本発明によれば、輸送用タンクに密閉したまま
で、現地での圧力容器タンクへの収納が可能となるもの
で、変圧器本体への水分、異物の混入が防止され信頼性
の高いガス絶縁変圧器が可能となるものである。According to the present invention, the pressure vessel tank can be stored on-site while being hermetically sealed in the transportation tank, so that water and foreign matter are prevented from being mixed into the transformer main body and reliability is improved. It enables high gas-insulated transformers.

【００１５】[0015]

【実施例】以下、本発明の一実施例を図面を参照して説
明する。図１は本発明の一実施例における圧力容器の横
断面を示す図である。図１において、変圧器本体２は輸
送時には輸送用タンク５に収納され輸送される。輸送用
タンク５には横補強ビーム６が長手方向に沿って取り付
けられ上部に水平フランジ７が取り付けられている。変
圧器本体２の鉄心２Ｂは上下クランプ１０，１１により
締め付けられており、下部クランプ１１の下には変圧器
本体２を支持するための支持架台１２が設置されてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a cross section of a pressure vessel according to an embodiment of the present invention. In FIG. 1, the transformer main body 2 is stored in a transportation tank 5 and transported during transportation. A horizontal reinforcing beam 6 is attached to the transportation tank 5 along the longitudinal direction, and a horizontal flange 7 is attached to the upper portion thereof. The iron core 2B of the transformer main body 2 is clamped by the upper and lower clamps 10 and 11, and a support frame 12 for supporting the transformer main body 2 is installed under the lower clamp 11.

【００１６】現地においては、図２に示すように輸送用
タンク５を挿入架台９に設置し、横型圧力容器１Ｂ、お
よび、中間架台１５を設置後、変圧器本体２を輸送用タ
ンク５とともに同図に矢印で示す方向に移動して圧力容
器１Ｂに引き込む。この場合図１に示した圧力容器１Ｂ
下部に設けられた支持部材１３の上に輸送用タンク５を
位置する。In the field, as shown in FIG. 2, the transportation tank 5 is installed on the insertion frame 9, and after the horizontal pressure vessel 1B and the intermediate frame 15 are installed, the transformer main body 2 is mounted together with the transportation tank 5. It moves in the direction shown by the arrow in the drawing and is drawn into the pressure vessel 1B. In this case, the pressure vessel 1B shown in FIG.
The transportation tank 5 is located on the support member 13 provided at the lower portion.

【００１７】輸送用タンク５の横型圧力容器への引き込
みが完了後、輸送用タンク５の盲蓋１４を取り外し、リ
ード（図示しない）の接続、絶縁ガスの封入などの作業
を実施して据え付けを完了する。After the transportation tank 5 is completely drawn into the horizontal pressure vessel, the blind lid 14 of the transportation tank 5 is removed, and the leads (not shown) are connected and the insulating gas is filled in for installation. Complete.

【００１８】本発明の構造によれば、変圧器本体２が気
中に曝される機会を大幅に削減することが可能となり、
変圧器本体への水分、塵の混入が防止できることとな
る。また、引き込み作業に伴い発生する異物のコイル内
への侵入が防止できるという大きな利点がある。According to the structure of the present invention, it is possible to greatly reduce the chance that the transformer body 2 is exposed to the air,
This will prevent moisture and dust from entering the transformer body. In addition, there is a great advantage that it is possible to prevent foreign matter generated by the pulling operation from entering the coil.

【００１９】なお、本発明は上記した実施例に限定され
るものでなく、種々変形して実施できる。すなわち、図
３に示すように上記した実施例の場合と同様の輸送用タ
ンク１５に変圧器本体２を収納して輸送を行い、現地に
おいては図示する横型圧力容器１Ｂ底にレール状に設け
られた支持部材１３上に輸送用タンク１５を位置する。The present invention is not limited to the above embodiment, but can be modified in various ways. That is, as shown in FIG. 3, the transformer main body 2 is housed in the same transportation tank 15 as in the case of the above-described embodiment for transportation. A transportation tank 15 is located on the supporting member 13.

【００２０】また、図４に示すように横型圧力容器１Ｂ
横に設けられた支持部材１３上に輸送用タンク１５の横
補強ビームを位置する。さらに、図５に示すように各相
ごとに輸送された変圧器本体２、および、その輸送用タ
ンク１５を、現地において各相が一体化された３相横型
圧力容器１Ｂに収納するなど、その主旨を変更しない範
囲で用いられることは明らかである。Further, as shown in FIG. 4, a horizontal pressure vessel 1B
The lateral reinforcing beam of the transportation tank 15 is positioned on the supporting member 13 provided laterally. Further, as shown in FIG. 5, the transformer main body 2 transported for each phase and the transportation tank 15 are housed in a three-phase horizontal pressure vessel 1B in which each phase is integrated, such as by Obviously, it can be used without changing the gist.

【００２１】[0021]

【発明の効果】以上に述べたように、本発明によれば、
輸送用タンクに密閉したままで、現地での圧力容器タン
クへの収納が可能となるもので、変圧器本体への水分、
異物の混入が防止され、堅労で信頼性の高いガス絶縁変
圧器を得ることができる。As described above, according to the present invention,
It is possible to store it in the pressure vessel tank on-site while keeping it sealed in the transportation tank.
It is possible to obtain a hard and highly reliable gas-insulated transformer in which foreign matter is prevented from entering.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例におけるガス絶縁変圧器を示
す説明図。FIG. 1 is an explanatory diagram showing a gas insulation transformer according to an embodiment of the present invention.

【図２】本発明の一実施例における現地の組立状態を示
す図。FIG. 2 is a diagram showing a local assembling state in one embodiment of the present invention.

【図３】本発明の他の実施例を示す図。FIG. 3 is a diagram showing another embodiment of the present invention.

【図４】同じく本発明の他の実施例を示す図。FIG. 4 is a view showing another embodiment of the present invention.

【図５】同じく本発明の他の実施例を示す図。FIG. 5 is a view showing another embodiment of the present invention.

【図６】縦型圧力容器に収納されたガス絶縁変圧器の断
面図。FIG. 6 is a cross-sectional view of a gas insulation transformer housed in a vertical pressure vessel.

【図７】横型圧力容器に収納されたガス絶縁変圧器の断
面図。FIG. 7 is a cross-sectional view of a gas insulation transformer housed in a horizontal pressure vessel.

【図８】圧力容器に収納されたガス絶縁変圧器の輸送状
態を示す図。FIG. 8 is a diagram showing a transportation state of the gas insulated transformer housed in the pressure vessel.

【図９】従来の輸送用タンクに収納した変圧器本体を示
す図。FIG. 9 is a view showing a transformer main body housed in a conventional transportation tank.

【図１０】従来の現地における組立状態を示す説明図で
ある。FIG. 10 is an explanatory diagram showing a conventional on-site assembled state.

【符号の説明】[Explanation of symbols]

１Ａ…縦型圧力容器、１Ｂ…横型圧力容器、２Ａ…コイ
ル、２Ｂ…鉄心、２…変圧器本体、３…縦フランジ、４
…輸送限界、５…輸送用タンク、６…横補強ビーム、７
…水平フランジ、８…門型クレーン、９…挿入架台、１
０…上部クランプ、１１…下部クランプ、１２…支持架
台、１３…支持部材、１４…盲蓋、１５…中間架台。1A ... Vertical pressure vessel, 1B ... Horizontal pressure vessel, 2A ... Coil, 2B ... Iron core, 2 ... Transformer body, 3 ... Vertical flange, 4
… Transport limit, 5… Transport tank, 6… Horizontal reinforcement beam, 7
… Horizontal flange, 8… Gate crane, 9… Insert stand, 1
0 ... Upper clamp, 11 ... Lower clamp, 12 ... Support mount, 13 ... Support member, 14 ... Blind lid, 15 ... Intermediate mount.

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 コイルおよび鉄心より成る変圧器本体を
ＳＦ₆ などの絶縁ガスを充填したタンクに収納するガス
絶縁変圧器において、輸送用タンクを変圧器本体ととも
に圧力容器タンクに収納することを特徴としたガス絶縁
変圧器。1. A gas-insulated transformer in which a transformer body composed of a coil and an iron core is housed in a tank filled with an insulating gas such as SF ₆ , wherein a transportation tank is housed in a pressure vessel tank together with the transformer body. And gas insulated transformer.