JPH04162603A - Gas-insulated transformer - Google Patents

Abstract

PURPOSE:To realize a gas-insulated transformer which can be transported by a freight train and whose capacity is large by a method wherein at least a transverse reinforcement beam can be attached or removed out of a longitudinal reinforcement beam and the transverse reinforcement beam which are attached to the outside of a tank. CONSTITUTION:An upper-part transverse reinforcement beam 20 and a lower-part transverse reinforcement beam 21 which are attached to the transverse direction on the side face of a curved surface plate 1b are constituted so as to be capable of being attached or removed. Bases 22, 23 for fixation use which tighten and fix the transverse reinforcement beams 20, 21 by using bolts or the like are attached to the side face of the curved surface plate 1b. By this constitution, a gas-insulated transformer can be transported in a state that the upper- part transverse reinforcement beam 20 and the lower-part transverse reinforcement beam 21 which are attached to the transverse direction on the side face of the curved surface plate 1b have been removed. Since the width L2 of a tank at its transportation becomes smaller than a permissible value l in the width direction at its transportation by a freight train, it is easy to set the width within a limit size A at its transportation by the freight train. When the transformer is installed in a site, the upper-part transverse reinforcement beam 20 and the lower-part transverse reinforcement beam 21 are attached. Thereby, the gas-insulated transformer whose capacity is large can be installed without damaging the internal-pressure strength of the tank.

Description

【発明の詳細な説明】 ［発明の目的コ （産業上の利用分野） 本発明は、ＳＦ６ガスなどの絶縁ガスを充填したタンク
内に、鉄心及びコイルより成る変圧器本体を収納したガ
ス絶縁変圧器に関するものである。[Detailed Description of the Invention] [Purpose of the Invention (Field of Industrial Application) The present invention relates to a gas insulated transformer in which a transformer body consisting of an iron core and a coil is housed in a tank filled with an insulating gas such as SF6 gas. It is related to vessels.

（従来の技術） 箔状巻線を備えた箔巻変圧器は巻線の占積率が良く、小
形・軽量化を実現できる特性を有するため、数ＫＶ、数
１００ＫＶＡ程度の比較的電圧の低い小容量の変圧器に
おいては、すでに実用化され広く普及されている。また
、この様な箔巻変圧器における巻線の冷却方法としては
、巻線内に冷却ダクトを内蔵させ、絶縁特性の優れた冷
媒を送り込んで、巻線損失から発生する熱を直接的に冷
却するヒートパイプ方式のものが考えられている。(Prior art) A foil-wound transformer equipped with a foil-shaped winding has a good winding space factor and has characteristics that allow it to be compact and lightweight, so it can be used at relatively low voltages of several KV or several hundred KVA. Small capacity transformers have already been put into practical use and are widely used. In addition, as a method for cooling the windings in such foil-wound transformers, a cooling duct is built into the windings, and a refrigerant with excellent insulation properties is fed into the windings to directly cool the heat generated from winding losses. A heat pipe type is being considered.

従来から用いられているヒートパイプ方式のガス絶縁変
圧器の一例を第５図に示した。即ち、タンク１には絶縁
媒体としてＳ　Ｆ　ｂガスなどの絶縁ガスが高圧で封入
され、また、タンク１の内部には鉄心２が設けられてい
る。この鉄心２の主脚２ａの外側には絶縁筒３を介して
低圧巻線４が巻装され、この低圧巻線４の外側には、絶
縁バリア６を介して高圧巻線５が巻装されている。なお
、これら低圧巻線４及び高圧巻線５は、アルミニウム箔
等から成る金属シート７と樹脂フィルム等から成る絶縁
シート８を重ねて巻回して成る箔状巻線によって構成さ
れている。また、低圧巻線４及び高圧巻線５には、その
軸方向に延びる冷却ダクト９が巻き込まれ内蔵されてい
る。この冷却ダクト９は、その内部にフロン１１３やフ
ロリナートＦＣ７５などの冷媒が通るように中空に構成
されており、また、前記冷媒はタンク１の外部に設けら
れた冷却器１０により冷却・凝縮され、ポンプ１１によ
り導液管１２と絶縁パイプ１３を介して循環されるよう
に構成されている。An example of a conventionally used heat pipe type gas insulated transformer is shown in FIG. That is, the tank 1 is filled with an insulating gas such as S F b gas as an insulating medium at high pressure, and an iron core 2 is provided inside the tank 1 . A low-voltage winding 4 is wound around the outside of the main leg 2a of the iron core 2 via an insulating tube 3, and a high-voltage winding 5 is wound around the outside of the low-voltage winding 4 through an insulating barrier 6. ing. The low-voltage winding 4 and the high-voltage winding 5 are constituted by foil-like windings formed by overlapping and winding a metal sheet 7 made of aluminum foil or the like and an insulating sheet 8 made of resin film or the like. Further, a cooling duct 9 extending in the axial direction is wound around and built into the low voltage winding 4 and the high voltage winding 5. The cooling duct 9 is hollow so that a refrigerant such as Freon 113 or Fluorinert FC75 passes through the cooling duct 9, and the refrigerant is cooled and condensed by a cooler 10 provided outside the tank 1. It is configured to be circulated by a pump 11 via a liquid guide pipe 12 and an insulated pipe 13.

（発明が解決しようとする課題） ところで、上述した様な従来のガス絶縁変圧器において
は、タンク内部に封入する絶縁ガスの絶縁耐力は、ガス
圧力を上げることによって高くなることから、タンク構
造としては圧力容器としての機能を有する必要がある。(Problem to be Solved by the Invention) By the way, in the conventional gas insulated transformer as described above, the dielectric strength of the insulating gas sealed inside the tank increases as the gas pressure increases. must have the function of a pressure vessel.

そのため、第６図及び第７図に示した様に、タンク本体
を楕円形状の鏡板１ａと曲面板１ｂとから構成し、その
周囲に補強ビームを溶接により取付けている。この補強
ビームとしては、鏡板１ａの上面に取付けられる上部補
強ビーム１４、曲面板１ｂの側面の縦方向に所定の間隔
をおいて取付けられる側面縦補強ビーム１８、曲面板１
ｂの下部に取付けられる下部縦補強ビーム１９、さらに
、曲面板１ｂの側面の横方向に取付けられる上部横補強
ビーム１６及び下部横補強ビーム１７等が用いられてい
る。Therefore, as shown in FIGS. 6 and 7, the tank body is constructed from an elliptical head plate 1a and a curved plate 1b, and a reinforcing beam is attached around the elliptical mirror plate 1a by welding. These reinforcing beams include an upper reinforcing beam 14 attached to the upper surface of the mirror plate 1a, a side vertical reinforcing beam 18 attached at a predetermined interval in the vertical direction on the side surface of the curved plate 1b, and a curved plate 1
A lower vertical reinforcing beam 19 attached to the lower part of the curved plate 1b, an upper lateral reinforcing beam 16 and a lower lateral reinforcing beam 17 attached laterally to the side surface of the curved plate 1b, etc. are used.

しかしながら、変圧器容量が増加するに伴って、内部に
収納される変圧器本体部分が大形化するため、タンク形
状も大きくなり、第６図に示した様に、上部横補強ビー
ム１６及び下部横補強ビーム１７の幅Ｌ１が、貨車輸送
における幅方向の許容値ｇより大きくなるため、貨車輸
送の制限寸法Ａ内に収めることが困難となっていた。However, as the capacity of the transformer increases, the main body of the transformer housed inside becomes larger, so the shape of the tank also becomes larger, and as shown in FIG. Since the width L1 of the horizontal reinforcing beam 17 is larger than the permissible value g in the width direction for freight car transportation, it has been difficult to keep it within the limit dimension A for freight car transportation.

′本発明は、上記の様な従来技術の欠点を解消するため
に提案されたものであり、その目的は、貨車輸送が可能
な、大容量のガス絶縁変圧器を提供することにある。'The present invention was proposed in order to eliminate the above-mentioned drawbacks of the prior art, and its purpose is to provide a large-capacity gas insulated transformer that can be transported by freight cars.

［発明の構成コ （課題を解決するための手段） 本発明は、内部に絶縁ガスを充填し、鉄心及び巻線より
成る変圧器本体を収納するタンクが、少なくとも２つの
部分から構成され、前記タンクの外側に縦方向に取付け
られる縦補強ビームと、横方向に取付けられる横補強ビ
ームとを備えたガス絶縁変圧器において、前記補強ビー
ムの内、少なくとも横補強ビームを着脱可能な構成とし
たことを特徴とするものである。[Structure of the Invention (Means for Solving the Problems) The present invention provides that a tank filled with an insulating gas and housing a transformer body consisting of an iron core and a winding is composed of at least two parts, In a gas insulated transformer equipped with a vertical reinforcing beam installed vertically on the outside of a tank and a horizontal reinforcing beam installed horizontally, at least among the reinforcing beams, at least the horizontal reinforcing beam is configured to be detachable. It is characterized by:

（作用） 以上の構成を有する本発明のガス絶縁変圧器によれば、
絶縁を確保する必要のない輸送時には、輸送時の寸法制
限に太き（影響する横補強ビームを取り外し、現地据付
は時に取付けることができるので、内圧強度を損ねるこ
となく、大容量のガス絶縁変圧器の輸送が可能となる。(Function) According to the gas insulated transformer of the present invention having the above configuration,
During transportation when there is no need to ensure insulation, it is possible to remove the horizontal reinforcing beams that affect the size restrictions during transportation, and install it on site, so it is possible to install a large capacity gas insulated transformer without compromising the internal pressure strength. It becomes possible to transport vessels.

（実施例） 以下、本発明の一実施例を第１図及び第２図に基づいて
具体的に説明する。なお、第５図乃至第７図に示した従
来型と同一の部材には同一の符号を付して、説明は省略
する。(Example) Hereinafter, an example of the present invention will be specifically described based on FIGS. 1 and 2. Note that the same members as those of the conventional type shown in FIGS. 5 to 7 are denoted by the same reference numerals, and explanations thereof will be omitted.

本実施例においては、第１図及び第２図に示した様に、
曲面板１ｂの側面の横方向に取付けられる上部横補強ビ
ーム２０及び下部横補強ビーム２１が着脱可能に構成さ
れ、また、曲面板１ｂの側面には、前記横補強ビーム２
０．２１をボルト等によって締付は固定する固定用ベー
ス２２．　２３が取付けられている。そして、輸送時に
は、前記横補強ビーム２０．２１は取り外され、現地据
付は時に、固定用ベース２２．２３に取付けられるよう
に構成されている。In this embodiment, as shown in FIGS. 1 and 2,
An upper horizontal reinforcing beam 20 and a lower horizontal reinforcing beam 21 attached laterally to the side surface of the curved board 1b are configured to be detachable, and the horizontal reinforcing beam 2 is attached to the side surface of the curved board 1b.
Fixing base 22.0.21 is tightened and fixed with bolts etc. 23 is installed. During transportation, the transverse reinforcing beams 20.21 are removed, and when installed on site, they are configured to be attached to a fixing base 22.23.

なお、前記上部横補強ビーム２０及び下部横補強ビーム
２１は金属製であり、タンクの側面部は一体に構成され
、タンクの両端部の曲面部においては、適宜分割して構
成されている。また、鏡板１ａの上面に取付けられる上
部補強ビーム１４、曲面板１ｂの側面の縦方向に所定の
間隔をおいて取付けられる側面縦補強ビーム１８、曲面
板１ｂの下部に取付けられる下部縦補強ビーム１９は、
貨車輸送の寸法制限に影響しないので、輸送時のタンク
強度を確保するために従来と同様に取付けられている。The upper lateral reinforcing beam 20 and the lower lateral reinforcing beam 21 are made of metal, and are integrally formed on the side surface of the tank, and are appropriately divided at the curved surfaces at both ends of the tank. Additionally, an upper reinforcing beam 14 is attached to the upper surface of the mirror plate 1a, a side vertical reinforcing beam 18 is attached at a predetermined interval in the vertical direction on the side surface of the curved plate 1b, and a lower longitudinal reinforcing beam 19 is attached to the lower part of the curved plate 1b. teeth,
Since it does not affect the dimensional restrictions for freight car transportation, it is installed in the same way as before to ensure tank strength during transportation.

この様な構成を有する本実施例のガス絶縁変圧器におい
ては、以下に述べる様にして貨車輸送における寸法制限
を緩和し、大容量のガス絶縁変圧器の輸送を可能として
いる。即ち、輸送時においては通電していないため絶縁
を確保する必要がなく、ガス圧力を最低限０．５ｋｇ／
ｃｍ２未満程度にすれば良いので、運転時の内圧強度を
必要としない。そこで、曲面板１ｂの側面の横方向に取
付けられる上部横補強ビーム２０及び下部横補強ビーム
２１を取り外した状態で輸送することができる。その結
果、第２図に示した様に、輸送時のタンクの幅Ｌ２は、
貨車輸送における幅方向の許容値ｇより小さくなるため
、貨車輸送の制限寸法Ａ内に収めることが容易なものと
なる。そして、現地据付は時に上部横補強ビーム２０及
び下部横補強ビーム２１を取付けることによって、タン
クの内圧強度を損ねることなく、大容量のガス絶縁変圧
器を設置することができる。In the gas insulated transformer of this embodiment having such a configuration, the dimensional restrictions in freight car transportation are relaxed as described below, making it possible to transport a large capacity gas insulated transformer. In other words, there is no need to ensure insulation because there is no electricity during transportation, and the gas pressure is kept at a minimum of 0.5 kg/kg.
Since it only needs to be about less than cm2, internal pressure strength during operation is not required. Therefore, the curved plate 1b can be transported with the upper horizontal reinforcing beam 20 and the lower horizontal reinforcing beam 21 attached laterally on the side surface removed. As a result, as shown in Figure 2, the width L2 of the tank during transportation is:
Since it is smaller than the permissible value g in the width direction for freight car transportation, it is easy to keep it within the limit dimension A for freight car transportation. During on-site installation, sometimes by attaching the upper horizontal reinforcing beam 20 and the lower horizontal reinforcing beam 21, a large capacity gas insulated transformer can be installed without impairing the internal pressure strength of the tank.

なお、本発明は上述した実施例に限定されるものではな
く、横補強ビームは、横方向及び縦方向を特に強化した
強化繊維による複合材料から構成しても良い。一般に、
タンクの高さ方向におけ不側面部の変形は、第３図に示
した様になり、また、タンクの長手方向における側面部
の変形は、第４図に示した様になる。なお、図中実線２
４はタンクの変形前の形状を示し、点線２５は内圧荷重
付加によってタンクが変形した後の状態を示している。Note that the present invention is not limited to the embodiments described above, and the horizontal reinforcement beam may be constructed of a composite material made of reinforcing fibers that are particularly reinforced in the horizontal and vertical directions. in general,
The deformation of the non-side surface portion in the height direction of the tank is as shown in FIG. 3, and the deformation of the side surface portion in the longitudinal direction of the tank is as shown in FIG. 4. In addition, solid line 2 in the figure
4 shows the shape of the tank before deformation, and the dotted line 25 shows the state after the tank is deformed by applying internal pressure load.

即ち、第３図に示した様に、タンクの高さ方向における
側面部の変形は、内圧により弓形に変形し、また、第４
図に示した様に、長手方向の側面部も弓形に変形する。That is, as shown in FIG. 3, the side surface of the tank in the height direction is deformed into an arched shape due to the internal pressure, and the fourth
As shown in the figure, the longitudinal side portions are also deformed into an arcuate shape.

そのため、横補強ビームに加わる応力は、主にタンク長
手方向における引張り応力が主となり、これに加えて縦
方向の引張り応力が生じる。従って、長手方向及び縦方
向、特に主となる長手方向の強度を強化して作った強化
繊維による複合材料を使用した補強ビームを用いれば、
金属製の補強ビームと比較して加工性も良く、タンクの
両端の曲面部においても分割する必要がない、タンク形
状に合致したビーム構造とすることができる。また、こ
の場合も、着脱可能な補強ビームとすることができるの
で、貨車輸送の制限寸法Ａ内に収めることが容易な、大
容量のガス絶縁変圧器が得られる。Therefore, the stress applied to the horizontal reinforcement beam is mainly tensile stress in the longitudinal direction of the tank, and in addition to this, tensile stress in the longitudinal direction is generated. Therefore, if you use a reinforced beam made of a composite material made of reinforcing fibers with increased strength in the longitudinal and longitudinal directions, especially in the main longitudinal direction,
It has better workability than a metal reinforcing beam, and it is possible to create a beam structure that matches the shape of the tank without the need to divide the curved surfaces at both ends of the tank. Moreover, in this case as well, since the reinforcing beam can be made detachable, a large-capacity gas insulated transformer that can be easily accommodated within the limit dimension A for freight car transportation can be obtained.

また、横補強ビームだけでなく、縦補強ビームも着脱可
能に構成しても良いことはいうまでもない。It goes without saying that not only the horizontal reinforcing beams but also the vertical reinforcing beams may be configured to be detachable.

［発明の効果］ 以上説明した様に、本発明によれば、タンクの外側に取
付けられる縦補強ビームと横補強ビームの内、少なくと
も横補強ビームを着脱可能な構成とすることによって、
貨車輸送が可能な、大容量のガス絶縁変圧器を提供する
ことができる。[Effects of the Invention] As explained above, according to the present invention, by making at least the horizontal reinforcing beam of the vertical reinforcing beam and the horizontal reinforcing beam attached to the outside of the tank removable,
It is possible to provide a large capacity gas insulated transformer that can be transported by freight cars.

【図面の簡単な説明】 第１図は本発明のガス絶縁変圧器の一実施例を示すタン
ク長手方向側面図、第２図は第１図のＡ−Ａ矢視図、第
３図はタンクの高さ方向における側面部の変形状態を示
す概略図、第４図はタンクの長手方向における側面部の
変形状態を示す概略図、第５図は従来のガス絶縁変圧器
の一例を示す断面図、第６図は従来のガス絶縁変圧器の
正面図、第７図は従来のガス絶縁変圧器の側面図である
。 １・・・タンク、１ａ・・・鏡板、１ｂ・・・曲面板、
２・・・鉄心、３・・・絶縁筒、４・・・低圧巻線、５
・・・高圧巻線、６・・・絶縁バリア、７・・・金属シ
ート、８・・・絶縁シート、９・・・冷却ダクト、１０
・・・冷却器、１１・・・ポンプ、１２・・・導液管、
１３・・・絶縁パイプ、１４・・・上部補強ビーム、１
５・・・フランジ、１６・・・上部横補強ビーム、１７
・・・下部横補強ビーム、１８・・・側面縦補強ビーム
、１９・・・下部縦補強ビーム、２０・・・上部横補強
ビーム、２１・・・下部横補強ビーム、２２．２３・・
・固定用ベース。 第２図[Brief Description of the Drawings] Fig. 1 is a longitudinal side view of a tank showing an embodiment of the gas insulated transformer of the present invention, Fig. 2 is a view taken along arrow A-A in Fig. 1, and Fig. 3 is a tank 4 is a schematic diagram showing the deformed state of the side surface in the longitudinal direction of the tank. FIG. 5 is a sectional view showing an example of a conventional gas insulated transformer. , FIG. 6 is a front view of a conventional gas insulated transformer, and FIG. 7 is a side view of a conventional gas insulated transformer. 1...tank, 1a... mirror plate, 1b... curved plate,
2... Iron core, 3... Insulating tube, 4... Low voltage winding, 5
... High voltage winding, 6... Insulating barrier, 7... Metal sheet, 8... Insulating sheet, 9... Cooling duct, 10
...Cooler, 11...Pump, 12...Liquid guide pipe,
13... Insulated pipe, 14... Upper reinforcement beam, 1
5... Flange, 16... Upper horizontal reinforcement beam, 17
...Lower horizontal reinforcement beam, 18.. Side vertical reinforcement beam, 19.. Lower vertical reinforcement beam, 20.. Upper horizontal reinforcement beam, 21.. Lower horizontal reinforcement beam, 22.23..
-Fixing base. Figure 2

Claims (1)

【特許請求の範囲】 　内部に絶縁ガスを充填し、鉄心及び巻線より成る変圧
器本体を収納するタンクが、少なくとも２つの部分から
構成され、前記タンクの外側に縦方向に取付けられる縦
補強ビームと、横方向に取付けられる横補強ビームとを
備えたガス絶縁変圧器において、 前記補強ビームの内、少なくとも横補強ビームを着脱可
能な構成としたことを特徴とするガス絶縁変圧器。[Scope of Claims] A vertical reinforcing beam, the tank being filled with an insulating gas and accommodating a transformer body consisting of an iron core and windings, is composed of at least two parts, and is vertically attached to the outside of the tank. and a horizontal reinforcing beam attached in the lateral direction, wherein at least the horizontal reinforcing beam among the reinforcing beams is configured to be detachable.