JPS5943698Y2 - Oil-immersed transformer outer box - Google Patents

Description

【考案の詳細な説明】 本考案は電力用油入変圧器の外箱に係る。[Detailed explanation of the idea] The present invention relates to an outer box for an oil-immersed power transformer.

電力用油入変圧器の外箱は、経済性等を考慮して比較的
厚さの薄い金属板で形成されているが。The outer casing of an oil-immersed power transformer is made of a relatively thin metal plate for economical reasons.

変圧器の運転中、あるいは製作中に相当の内外圧を外箱
内外壁面に受けるためにそれに耐え得る補強をしなけれ
ばならない。Since the inner and outer walls of the outer box are subjected to considerable internal and external pressure during operation or manufacture of the transformer, reinforcement must be provided to withstand the pressure.

このため従来は第１図に示すように長辺側板１゜１の縦
方向にのび外方へ突出する所定間隔の複数の補強リプ２
を折曲形成し、この側板１，１に短辺側板３，３を溶接
して箱枠を形成した後１箱枠の底端に底板４を、上端に
カバー取付用の７ランジ５をそれぞれ溶接し、変圧器外
箱６を製作していた。For this reason, conventionally, as shown in FIG.
After forming a box frame by welding the short side plates 3, 3 to the side plates 1, 1, a bottom plate 4 is attached to the bottom edge of the box frame, and 7 langes 5 for attaching the cover are attached to the upper edge of the box frame. The transformer outer box 6 was manufactured by welding.

この場合、長辺側板１を外方へ突出するように折曲げて
補強リプ２を形成するため、変圧器外箱内に満たされ、
変圧器構成部品の冷却媒体となる絶縁油の油量を増加さ
せ不経済である。In this case, the long side plate 1 is bent so as to protrude outward to form the reinforcing lip 2, so that the reinforcing lip 2 is filled in the transformer outer box.
This increases the amount of insulating oil that serves as a cooling medium for transformer components, which is uneconomical.

また変圧器外箱上端に７ランジ５を別部品として用意し
。In addition, 7 lunges 5 are prepared as separate parts at the upper end of the transformer outer box.

これを側板の上端に溶接するために製作の手数と時間を
要し、かつ気密性を保持するためにフランジと側板との
接触周縁すべてにわたり溶接を行うことから、フランジ
に躊接歪を生じさせ、歪取りを施さなければフランジ上
に増付けるカバーとの気密性が保てないという欠点があ
る。Welding this to the upper end of the side plate requires manufacturing effort and time, and in order to maintain airtightness, welding is performed over the entire contact periphery of the flange and side plate, which may cause welding distortion to the flange. However, there is a drawback that airtightness with the cover added on the flange cannot be maintained unless strain relief is applied.

本考案は上記の事情に鑑みｆｘされたもので、油量の節
約、気密性の確保を計ることができ加工手数の少い構造
の電力用油入変圧器の外箱を提供することを目的とする
。This invention was developed in consideration of the above circumstances, and the purpose is to provide an outer box for an oil-immersed power transformer that saves oil amount, ensures airtightness, and requires less processing time. shall be.

以下図面につき本考案の詳細を説明する。The details of the present invention will be explained below with reference to the drawings.

第２図にかいて、長辺側板１０，１０釦よび短辺側板１
１，１１によって中空箱枠を形成し、この箱枠の底端に
底板１２を溶接する。In Figure 2, the long side plates 10 and 10 buttons and the short side plate 1
1 and 11 form a hollow box frame, and a bottom plate 12 is welded to the bottom end of this box frame.

長辺側板１０．１０には縦方向にのび内方へ突出する所
定間隔の補強リプ１３が形成される。The long side plates 10.10 are formed with reinforcing lips 13 extending longitudinally and projecting inwardly at predetermined intervals.

すなわち、この補強リプ１３ば、例えば矩形状に形成す
る場合には、第３図に示すように長辺側板１０の上下端
縁にそれぞれ必要とする数の長方形の切込部１４を設け
る。That is, when the reinforcing lip 13 is formed into a rectangular shape, for example, a required number of rectangular notches 14 are provided at the upper and lower edges of the long side plate 10, as shown in FIG.

さらに切込部１４の底縁の水平延長線上に切込線りを入
れる。Furthermore, a cut line is made on the horizontal extension line of the bottom edge of the cut portion 14.

そしてこの切込線りと底縁に位置する部分を、垂直鎖線
ＤｉｐＤ２ｐＤ３およびＤ４で示す箇所で内方に折曲げ
、第４図に示すように矩形状の補強リプ１３を形成する
。Then, the portion located at the cut line and the bottom edge is bent inward at locations indicated by vertical chain lines DipD2pD3 and D4 to form a rectangular reinforcing lip 13 as shown in FIG.

また切込部１４を除く上下の端縁部を底縁の水平延長線
である図示水平鎖線Ｆで示す箇所で外方へ折曲げフラン
ジ１５を形成する。Further, the upper and lower end edges excluding the cut portion 14 are bent outward at a location indicated by a horizontal chain line F, which is a horizontal extension of the bottom edge, to form a flange 15.

補強リブ１３の上下開口部は平板１６により塞いでその
周縁を醇接する。The upper and lower openings of the reinforcing ribs 13 are closed by flat plates 16 and their peripheral edges are welded.

また切込部１４の底縁の両側に位置する側縁は補強リプ
１３が折曲げ成形されたことによって突合わされてフラ
ンジ１５を形成するので、この突合せ部１７も溶接する
。Further, since the side edges located on both sides of the bottom edge of the notch 14 are abutted together by bending and forming the reinforcing lip 13 to form a flange 15, this abutting portion 17 is also welded.

なお、補強リプの個数およびその間隔は側板の板厚、内
外許容圧力の大きさによって適宜決定され、その形成も
、矩形状に限らず、半円形、三角形等適当な形状を採用
することが可能である。The number of reinforcing ribs and the spacing between them are determined as appropriate depending on the thickness of the side plate and the allowable internal and external pressure, and their formation is not limited to a rectangular shape, but can also be of any suitable shape such as a semicircular or triangular shape. It is.

さらに本実施例では長辺側板に補強リプを設けたが、勿
論、長辺側板と共に短辺側板に設けても良い。Further, in this embodiment, the reinforcing lip is provided on the long side plate, but it goes without saying that the reinforcing lip may be provided on the short side plate together with the long side plate.

本考案によれば、変圧器外箱内方向に突出する補強リブ
およびカバー増付用７ランジをプレス等の機械加工によ
り一体的に折曲げ成形することができ、溶接箇所の減少
による作業工数の減少、溶接歪の減小によるカバーと７
ランジとの気密性の確保、変圧器外箱内方へ突出する補
強リブによる外箱内容積の減少によジ注入する絶縁油の
節油を可能にする等の効果がある。According to the present invention, the reinforcing ribs that protrude inward to the transformer outer box and the seven cover extension flanges can be integrally bent and formed by machining such as a press, reducing the number of work steps by reducing the number of welding points. reduction, cover due to reduction of welding distortion and 7
This has the effect of ensuring airtightness with the transformer outer box, and reducing the volume of the outer box due to the reinforcing ribs that protrude inward to the transformer outer box, thereby making it possible to save on insulating oil injected into the transformer outer box.

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

第１図は従来の電力用油入変圧器の外箱を示し、同図Ａ
はその平面図、同図Ｂはその正面図、第２図ないし第４
図は、本考案の電力用油入変圧器の外箱を示し、第２図
Ａはその平面図、同図Ｂはその正面図、第３図は、補強
リプおよびフランジを形成するための側板の一部切欠展
開図、第４図は前回の側板を成形加工した一部切欠外観
斜親図である。 １０・・・・・長辺側板、１１・・・・・短辺側板、１
３・・・・・・補強リブ、１５・・・・・・７ランジ。Figure 1 shows the outer box of a conventional power oil-immersed transformer.
is its plan view, figure B is its front view, and figures 2 to 4.
The figures show the outer box of the oil-immersed power transformer of the present invention, FIG. 2A is its plan view, FIG. B is its front view, and FIG. 3 is the side plate for forming reinforcing lips and flanges. Fig. 4 is a partially cutaway exploded view of the previous side plate. 10... Long side side plate, 11... Short side side plate, 1
3...Reinforcement rib, 15...7 lunge.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 一対の短辺側板と、一対の長辺側板と、これら側板によ
って形成された中空箱枠の底端に増付けられた底板と、
上端周縁に増付けられたフランジとを有する油入変圧器
外箱において、前記側板の上下端縁にそれぞれ切込部を
形成するとともに各切込部の底縁の水平延長線上に切込
線を形成し、各切込部の底縁及び切込線に位置する部分
を内方に任意の形状に折曲げて補強リプを形成し、かつ
各切込部を除く上下端縁部をそれぞれ底縁の水平延長線
に沿って外方に折曲げてフランジを形成し前記補強リプ
の上下開口部を平板で閉塞するとともに各切込部の底縁
の両側に位置する側縁を突合せ溶接したことを特徴とす
る油入変圧器外箱。a pair of short-side side plates, a pair of long-side side plates, and a bottom plate added to the bottom end of the hollow box frame formed by these side plates;
In an oil-immersed transformer outer box having a flange added to the upper peripheral edge, notches are formed at the upper and lower edges of the side plate, and a cut line is formed on the horizontal extension line of the bottom edge of each notch. The bottom edge of each cut and the part located at the cut line are bent inward into an arbitrary shape to form a reinforcing lip, and the upper and lower edges excluding each cut are bent at the bottom edge. The reinforcing lip is bent outward along the horizontal extension line to form a flange, the upper and lower openings of the reinforcing lip are closed with flat plates, and the side edges located on both sides of the bottom edge of each notch are butt welded. Features an oil-immersed transformer outer box.