JPS5829609B2 - Tank for oil-filled electrical equipment - Google Patents

Description

【発明の詳細な説明】 本発明は変圧器等の油入電気機用タンクに関する。[Detailed description of the invention] The present invention relates to a tank for an oil-filled electrical machine such as a transformer.

近年第１図、第２図に示すような逆Ｕ字状断面を有する
張出部を備えた放熱板が開発され、これを放熱器として
油入電気機器タンクに採用されている。In recent years, a heat sink having an overhang having an inverted U-shaped cross section as shown in FIGS. 1 and 2 has been developed, and this heat sink is used as a heat sink in oil-filled electrical equipment tanks.

具体的には第１図、第２図に示すように薄いシート状の
鋼板１の同一側に所定の間隔をおいて成形された逆Ｕ字
形断面の凸部を設けてひれ状の張出部１ａを形成し、と
の張出部１ａの上下端縁１ｂを圧接してアーク溶接など
でシールし、との張出部内を張出油室に形成して放熱器
２とするものである。Specifically, as shown in FIGS. 1 and 2, convex portions with an inverted U-shaped cross section are formed at predetermined intervals on the same side of a thin sheet steel plate 1 to form fin-like overhangs. 1a, the upper and lower edges 1b of the overhanging portion 1a are pressed together and sealed by arc welding or the like, and the inside of the overhanging portion is formed into an overhanging oil chamber to form the radiator 2.

この放熱器２を用いて油入電気機器のタンクを構成する
場合には第１図に示すように放熱板１の平担部１ｃの上
下両端縁１ｄをそれぞれタンクの上部フランジ３の側辺
と下部底板４の側辺に溶接等により固着し、放熱器２で
タンクの側壁を構成する。When configuring a tank for oil-filled electrical equipment using this radiator 2, as shown in FIG. It is fixed to the side of the lower bottom plate 4 by welding or the like, and the radiator 2 constitutes the side wall of the tank.

また上部フランジ３の上方には図示しないバッキングを
介してカバー３ｂが気密に固定される。Further, a cover 3b is airtightly fixed above the upper flange 3 via a backing (not shown).

上記のようにしてタンクを構成するに際し、タンクの断
面形状が円形あるいはコーナ部にＲを設けた多角形のと
きは、それぞれ上部フランジ３および下部底板４の各側
板３ａ、４ａの全周にあるいはコーナ部にＲ（わん曲）
部を有するため、このＲ部と接合する放熱板１の平担部
１ｃが平板状では、第２図に示すようにこれら接合部分
に隙間５が生じ、この接合部分の溶接がきわめて困難で
あると共に、溶接の強度上の問題もある。When configuring the tank as described above, if the cross-sectional shape of the tank is circular or polygonal with rounded corners, the entire circumference of each side plate 3a, 4a of the upper flange 3 and lower bottom plate 4, or R at the corner (one curve)
Therefore, if the flat part 1c of the heat sink 1 that joins this R part is flat, a gap 5 will be created between these joint parts as shown in FIG. 2, and it will be extremely difficult to weld this joint part. There is also a problem with welding strength.

従って従来は第３図〜第８図に示すように放熱板１の平
担部１ｃに上下全幅にわたってＲ部を設け、このＲ部の
上下両端縁１ｄを上部フランジ３の側辺３ａと、下部底
板４の側辺４ａにそれぞれ密着接合して溶接固定してい
る。Therefore, conventionally, as shown in FIGS. 3 to 8, a rounded part is provided on the flat part 1c of the heat sink 1 over the entire upper and lower width, and both upper and lower edges 1d of this rounded part are connected to the side 3a of the upper flange 3 and the lower part. They are closely joined and fixed by welding to the side edges 4a of the bottom plate 4, respectively.

例えば円形タンク用の放熱板１の成形についていえば、
第８図に示すように放熱板１をＲ成形下型ドラム８にク
ランプしてドラム８を逆Ｕ字形凸部の１ピツチづつ回転
させ、各ピッチ毎にＲ成形外型７が下降して放熱板１の
平担部１ｃの上下全幅にわたってＲ部を設けていた。For example, when it comes to forming the heat sink 1 for a circular tank,
As shown in FIG. 8, the heat dissipation plate 1 is clamped to the R-forming lower mold drum 8, and the drum 8 is rotated one pitch at a time on the inverted U-shaped convex part, and the R-forming outer mold 7 is lowered at each pitch to dissipate heat. An R portion was provided over the entire width of the flat portion 1c of the plate 1 in the upper and lower directions.

このため上下のＲ成型型８，７が放熱板１の幅分だけ必
要であるため大型になってこれらの駆動装置も大きくな
り、さらにＲ成形後の放熱板１は平担部１ｃに全幅にわ
たってＲのくせがつくため、第８図に示すように下型８
Ｋまとわりつき、その取外し作業はきわめて困難であっ
た。For this reason, the upper and lower R molding molds 8 and 7 are required for the width of the heat sink 1, which increases the size of the drive device. Because of the curved radius, the lower mold 8 is
K stuck to it, making removal work extremely difficult.

また取外した放熱板１は単体で放置されると第９図に示
すように張出部１ａと共に円形となってかさばるため、
放熱板同志の積載が困難でかつ横に並べてもスペースフ
ァクターが悪く保管上大きなスペースを要し、運搬に際
しても困難をきたしてた。In addition, if the removed heat sink 1 is left alone, it becomes bulky and becomes circular together with the overhanging portion 1a as shown in FIG.
It was difficult to load the heat sinks together, and even when they were placed side by side, the space factor was poor, requiring a large space for storage, and it was difficult to transport them.

本発明は上記従来の欠点をなくしたものでありその特徴
とするところは上部フランジと下部底板のわん曲状側辺
に当接する放熱板の平担部の上下両端に局部的にＲ部を
設けた点にある。The present invention eliminates the above-mentioned conventional drawbacks and is characterized by the provision of locally rounded portions at both upper and lower ends of the flat portion of the heat sink that contacts the curved sides of the upper flange and the lower bottom plate. It is at the point.

実施例について説明すると第１０図は円形タンクを構成
する放熱板のＲ成形時におけるＲ成形機ｐ動作説明図で
ある。To explain the embodiment, FIG. 10 is an explanatory diagram of the operation of the R-forming machine P during R-forming of a heat sink constituting a circular tank.

あらかじめ所定の間隔を有する逆Ｕ字形凸部に成形され
た放熱板１１は送シローラ９により逆Ｕ字形凸部の１ピ
ツチ分づつ水平に送られる。The heat dissipation plate 11, which has been formed in advance into inverted U-shaped protrusions having predetermined intervals, is fed horizontally by a pitch of the inverted U-shaped protrusions by a feed roller 9.

放熱板１１の平担部１２がＲ成形機１０の下型１０ａ上
に載って停止すると、上型１０ｂが下降して平担部の上
下両端縁を部分的に下型１０ａに押し付けてＲ成形する
。When the flat part 12 of the heat dissipation plate 11 rests on the lower mold 10a of the R forming machine 10 and stops, the upper mold 10b descends and partially presses both upper and lower edges of the flat part against the lower mold 10a to perform R forming. do.

このようにＲ成形機の上下型は放熱板１１を部分的に成
形すればよいので小形のものでよい。In this way, the upper and lower molds of the R molding machine may be small because the heat dissipation plate 11 only needs to be partially molded.

放熱板１１は第１２図〜第１５図に示すように平担部１
２はその上下両端縁に部分的にＲ成形されて成る部分的
わん曲部１２ａ、１２ｂを有し、その他の中央付近１２
ｃは平板状である。The heat sink 11 has a flat portion 1 as shown in FIGS. 12 to 15.
2 has partially curved portions 12a and 12b formed by partially rounded edges on both upper and lower edges, and the other portions near the center 12
c is a flat plate.

このように面積的にみて平板状部分を多くしておくとＲ
Ｊ形後平担部１２が従来のようにわん曲せず放熱板１１
は全体として直線状を維持する。In this way, if you increase the number of flat parts in terms of area, R
The J-shaped rear flat part 12 is not curved like the conventional one, and the heat sink 11
maintains a straight line as a whole.

従ってＲ成形後放熱板１１は送りローラ上を水平に送ら
れ所定寸法毎に切断される。Therefore, after R-forming, the heat sink 11 is sent horizontally on a feed roller and cut into predetermined dimensions.

切断後放熱板１１単体は送りローラから容易に取外され
、さらに取外し後第１１図に示すように水平に複数枚積
重ねることができる。After cutting, the heat dissipating plate 11 can be easily removed from the feed roller, and after being removed, a plurality of heat dissipating plates 11 can be stacked horizontally as shown in FIG.

上記のようにして成形された放熱板１１ばその平担部の
部分的わん曲部１２ａ、１２ｂが円形の上部７ランジ１
３と下部底板１４の各側辺１３ａ。The heat dissipation plate 11 formed as described above has a circular upper part 7 flange 1 with partially curved parts 12a and 12b of the flat part.
3 and each side 13a of the lower bottom plate 14.

１４ａに沿うように円形に弾性変形され溶接で仮止めさ
れ、その後完全に溶接固定される。It is elastically deformed into a circular shape along line 14a, temporarily fixed by welding, and then completely fixed by welding.

従って放熱板１１の平担部の部分的わん曲部１２ａ。Therefore, the partially curved portion 12a of the flat portion of the heat sink 11.

１２ｂは第１６図・第１７図に示すように上部フランジ
１３の側辺１３ａと上部底板１４の側辺１４ａに全周に
わたって密着し、強い強度で溶着される。As shown in FIGS. 16 and 17, the flange 12b is in close contact with the side 13a of the upper flange 13 and the side 14a of the upper bottom plate 14 over the entire circumference, and is welded with strong strength.

なお、放熱板１１を円形に変形した状態でも、放熱板１
１の平担部の中央付近１２ｃは依然として平板状であり
、その横断面は第２図に示す平担部１ｃのように多角形
状を呈する。Note that even when the heat sink 11 is deformed into a circular shape, the heat sink 1
The central portion 12c of the flat portion 1 is still flat, and its cross section has a polygonal shape like the flat portion 1c shown in FIG.

また平担部１２のＲ成形作業は第１０図に示す場合とは
別に、帯状薄鋼板を所定の間隔を有する逆Ｕ字形凸部に
成形するときと同時に行うようにしてもよい。In addition to the case shown in FIG. 10, the R-forming operation of the flat portion 12 may be performed at the same time as forming the strip-shaped thin steel plate into inverted U-shaped convex portions having predetermined intervals.

上記実施例は円形タンクを構成する放熱板であるが、コ
ーナ部にＲを設けた角形タンクに用いる放熱板は第１８
園、第１９図に示すように放熱板の平担部のうち上部フ
ランジ１３と下部底板１４の少くともコーナ部１５に当
接する上下両端縁にＲ部を設ければよい。The above example is a heat sink that constitutes a circular tank, but the heat sink used for a square tank with rounded corners is the 18th heat sink.
As shown in FIG. 19, rounded portions may be provided on both upper and lower edges of the flat portion of the heat sink that abut at least the corner portions 15 of the upper flange 13 and the lower bottom plate 14.

以上の説明から明らかなように本発明は上部フランジと
下部底板の各側辺に放熱板の逆Ｕ字状凸部間の平担部の
上下両端を当接固定して構成する油入電気機器用タンク
において、上記各側辺のわん曲部に対応する放熱板の逆
Ｕ字状凸部の平担部には、上下両端に部分的にわん曲部
を設けたので、各側辺と放熱板平担部のわん曲部同志の
密着性の良さを損うことなくＲ成形が従来より小形の成
形機で簡単に行える。As is clear from the above description, the present invention is an oil-filled electrical device constructed by abutting and fixing both upper and lower ends of a flat part between an inverted U-shaped convex part of a heat sink to each side of an upper flange and a lower bottom plate. In the tank, the flat part of the inverted U-shaped convex part of the heat dissipation plate corresponding to the curved part on each side is partially curved at both the upper and lower ends, so that each side and the heat dissipation R-forming can be easily performed using a smaller molding machine than before without impairing the adhesion between the curved parts of the flat plate parts.

またわん曲成形後の放熱板は全体的に従来のようにわん
曲せずに成形前の直線状のままとなるため、かさばらず
成形機からの取出しが容易であり、さらに放熱板単体の
保管・運搬に際して小さなスペースで済み、これらのコ
ストを大幅に低下させることができる。In addition, the heat sink after curve molding remains in the straight shape before molding instead of being curved as in conventional methods, so it is not bulky and can be easily removed from the molding machine, and furthermore, the heat sink itself can be stored easily.・It requires a small space for transportation, which can significantly reduce these costs.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の油入電気機器用タンクの一部を切欠いて
示す部分正面図、第２図は、第１図のＡ−Ａ′線に沿う
横断面図、第３図は他の従来例の横断面図、第４図はそ
の直線状放熱板の斜視図、第５図は第４図Ｂ −Ｂ’線
に沿う縦断面図、第６図は第４図Ｃ−Ｃ線に沿う横断面
図、第７図は第４図の矢印りからみた平面図、第８図は
従来のＲ成形機の動作説明図、第９図ばＲ成形後の従来
の放熱板の斜視図、第１０図は本発明のＲｆｆ形機の動
作説明図、第１１図は本発明実施例の放熱板の積載状態
を示す斜視図、第１２図は同じく放熱板の斜視図、第１
３図は第１２図のＥ−ｇ線に沿う縦断面図、第１４図は
第１２図のＦ−Ｆ’線に沿う横断面図、第１５図は第１
２図の矢印Ｇからみた平面図、第１６図は本発明実施例
のタンクの横断面図、第１７図はその一部を切欠いて示
す正面図、第１８図は本発明の他の実施例のタンクの横
断面図、第１９図はその一部を切欠いて示す正面図であ
る。 １ａ・・・・・・逆Ｕ字形凸部、１１・・・・・・放熱
板、１２・・・・・・平担部、１２ａ、１２ｂ・・・・
・・平担部の部分的わん曲部、１３・・・・・・上部フ
ランジ、１３ａ・・・・・・上部フランジの側辺、１４
・・・・・・下部底板、１４ａ・・・・・・下部底板の
側辺。Fig. 1 is a partially cutaway front view of a conventional tank for oil-filled electrical equipment, Fig. 2 is a cross-sectional view taken along line A-A' in Fig. 1, and Fig. 3 is a partial front view of a conventional tank for oil-filled electrical equipment. A cross-sectional view of the example, FIG. 4 is a perspective view of the linear heat sink, FIG. 5 is a vertical cross-sectional view taken along line B-B' in FIG. 4, and FIG. 6 is a view taken along line C-C in FIG. 4. 7 is a plan view taken from the arrow in FIG. 4, FIG. 8 is an explanatory diagram of the operation of a conventional R forming machine, FIG. 9 is a perspective view of a conventional heat sink after R forming, and FIG. FIG. 10 is an explanatory diagram of the operation of the Rff type machine of the present invention, FIG. 11 is a perspective view showing the loading state of the heat sink of the embodiment of the present invention, FIG. 12 is a perspective view of the heat sink, and the first
3 is a longitudinal sectional view taken along line E-g in FIG. 12, FIG. 14 is a cross-sectional view taken along line FF' in FIG. 12, and FIG.
2 is a plan view taken from arrow G in FIG. 2, FIG. 16 is a cross-sectional view of a tank according to an embodiment of the present invention, FIG. 17 is a partially cutaway front view, and FIG. 18 is another embodiment of the present invention. FIG. 19 is a partially cutaway front view of the tank. 1a... Inverted U-shaped convex portion, 11... Heat sink, 12... Flat portion, 12a, 12b...
...Partially curved part of flat part, 13... Upper flange, 13a... Side side of upper flange, 14
...Lower bottom plate, 14a...Side side of the lower bottom plate.

Claims (1)

【特許請求の範囲】 １ 断面形状に曲率部を有する上部７ランジと、断面形
状に曲率部を有する下部底板と、それらの中間に側壁と
して設けられた上下両端をそれぞれ前記上部フランジと
前記下部底板とに当接し溶接固定されてなる放熱板とを
備えた油入電機器用タンクにおいて、前記放熱板は所定
の間隔をおいて同一側に突出成形された逆Ｕ字状凸部を
備え、前記逆Ｕ字状凸部はその上下端縁が圧接され溶接
でシールされて成り、かつ前記逆Ｕ字状凸部間の平担部
は前記上部フランジ・下部底板の曲率部と当接する上下
両端に前記逆Ｕ字状凸部と同じ側に突出形成された部分
的わん曲部を備えて成ることを特徴とする油入電気機器
用タンク。 ２ 前記上部７ランジと前記下部底板はそれらの断面形
状においてそれぞれ全周に曲率部を有して成ることを特
徴とする特許請求の範囲第１項記載の油入電気機器用タ
ンク。 ３ 前記上部フランジと前記下部底板の断面形状がそれ
ぞれ円であることを特徴とする特許請求の範囲第１項記
載の油入電気機器用タンク。 ４ 前記上部フランジと前記下部底板はそれらの断面形
状において、それぞれ部分的に曲率部を有して成ること
を特徴とする特許請求の範囲第１項記載の油入電気機器
用タンク。[Scope of Claims] 1. An upper 7 flange having a curvature in its cross-section, a lower bottom plate having a curvature in its cross-section, and upper and lower ends provided as side walls in between, respectively, the upper flange and the lower bottom plate. In the tank for oil-filled electrical equipment, the heat sink is provided with an inverted U-shaped convex portion that is protruded from the same side at a predetermined interval, The upper and lower edges of the U-shaped convex portion are pressed together and sealed by welding, and the flat portion between the inverted U-shaped convex portions has the above-mentioned upper and lower edges at both upper and lower ends that contact the curved portions of the upper flange and lower bottom plate. A tank for oil-filled electrical equipment characterized by comprising a partially curved part protruding from the same side as the inverted U-shaped convex part. 2. The tank for oil-filled electrical equipment according to claim 1, wherein the upper 7 langes and the lower bottom plate each have a curvature portion around the entire circumference in their cross-sectional shapes. 3. The tank for oil-filled electrical equipment according to claim 1, wherein the upper flange and the lower bottom plate each have a circular cross-sectional shape. 4. The tank for oil-filled electrical equipment according to claim 1, wherein the upper flange and the lower bottom plate each have a partially curved section in their cross-sectional shapes.