JPS6042806A - Tank for oil-immersed electric apparatus - Google Patents

Abstract

PURPOSE:To prevent a tank from breakdown by attaching a reinforcing plate having a shape of partial cylinder to the inner corner of the tank corresponding to the junction where reinforcing beams welded to the outer wall of the tank are connected to each other such that the plate is inscribed with the corner. CONSTITUTION:A reinforcing plate 9 having a shape of partical cylinder is fixed to the inner corner of the tank 4 where reinforcing beams 6 welded to the outer wall of the tank are connected to each other such that the plate is inscribed in the tank corner. According to this constitution, it can be avoided that the stress is concentrated locally by large deformation during vacuum injection of insulating oil or due to the inner pressure raised when a trouble occurres inside the tank. So the tank can be effectively prevented from breakdown.

Description

【発明の詳細な説明】 〔発明の技術分！Ｉ！ｆ　） 本発明は、油入変圧器等の油入電器タンクに係ｐ特にそ
のタンクの防災構造（１関するものである。[Detailed description of the invention] [Technical portion of the invention! I! f) The present invention relates to tanks for oil-filled electric appliances such as oil-filled transformers, and particularly relates to disaster prevention structures for such tanks.

〔発明の技術的１ｒ景とその問題点〕 抽入変圧器のとどく機器本体と絶縁油を収納する油入磁
器タンク内部４二おいて、内部事故が発生しアークが生
じた場合油の分解ガスにより、タンク内圧ｔま急派に上
列する。[Technical aspects of the invention and its problems] If an internal accident occurs and an arc occurs in the main body of the equipment that the inlet transformer reaches and the oil-filled porcelain tank that stores the insulating oil, oil decomposition gas will be released. As a result, the tank internal pressure t rises to the top.

小さな内部事故でおれば、タンクの膨張と放圧装置から
の油の放出（二１９、前記圧力上昇を緩オロすることが
出来る。しかし大きな系統容器に連結された油入変圧器
のような場合その急激、な圧力上昇を、タンクの膨張と
放圧装置からの油放出では緩和出来ず、タンクが破壊し
、尚温のガスおよび油を噴出するおそれがある。更（二
高温のガスお上＼ び油の噴出は、周辺の機器を８ｔしするだけでなく大気
中の酸素に触れて宥火し火災示故等めよｐ大きな二次的
災害（二発展するおそイ′シがある。In the case of a small internal accident, the expansion of the tank and release of oil from the pressure relief device (219) can slow down the pressure rise. However, in the case of an oil-immersed transformer connected to a large system vessel, This sudden pressure increase cannot be alleviated by expanding the tank and releasing oil from the pressure relief device, and there is a risk that the tank will break and spout out still-hot gas and oil. The eruption of oil not only destroys 8 tons of surrounding equipment, but also comes in contact with oxygen in the atmosphere and extinguishes the fire, causing a major secondary disaster such as a fire outbreak.

タンク破壊は、その機械的強厩の弱い部分（二発生した
亀裂が進展開口し噴油（＝至るもので、タンクの機械的
強屁の弱い部分としては、タンク接合フランジ部とタン
ク外周壁（二溶接固着された補強ビーム４１互の連結部
分があげられる。しかしタン□り接合フランジ部は、Ｃ
形補強材をはめ込み渭接固着することによｐ、その部分
の内圧破壊強度を向上し得ることがよく知られている。Tank destruction occurs when the mechanical strength of the tank is weak (2), where the cracks that occur propagate and open, leading to oil gushing (=). An example of this is the joint between the two reinforcing beams 41, which are fixed by welding.However, the tongue joint flange is
It is well known that by inserting a shape reinforcing material and fixing it together, it is possible to improve the internal pressure rupture strength of that part.

第１図および第２図は、従来の油入゛電器でおる油入変
圧器構造を示す上部に１面図と１１１１断面図であシ、
第３図は、内圧上昇時のタンク隅部の変形状況を示す説
明図である。Figures 1 and 2 show the structure of an oil-immersed transformer, which is a conventional oil-immersed electric appliance, with a 1-side view and a 1111 cross-sectional view at the top.
FIG. 3 is an explanatory diagram showing the deformation of the corner of the tank when the internal pressure increases.

変圧器本陣１と絶、ｌ！曲を収納する変圧器タンク２は
、上部インク３と下部タンク４にょ多構成され、上部タ
ンク３と下部タンク、４の接合フランジ郁（二は、その
全周にわたって、適宜間がくを置いて被数１１６１のＣ
形−補強材５がはめ込まれ、溶接ｃ二より固着されてい
る。Transformer Honjin 1 and Zetsu, l! The transformer tank 2 that stores the music is composed of an upper ink tank 3 and a lower tank 4. number 1161 C
A shape-reinforcing member 5 is fitted and fixed by welding c2.

下部タンク４の外周側壁に１１補強ビーム６が溶接され
、該補強ビーム６はタンク隅部において、相互が連結固
着されている。さらに補強ビーム６の相互連結部に対応
するタンク内ＡＭ部Ｃ二は三角形状の補強ガセット板７
が取付けられている。又、上部タンク３ｉｎ）まブッシ
ング８が装着されている。11 reinforcing beams 6 are welded to the outer peripheral side wall of the lower tank 4, and the reinforcing beams 6 are connected and fixed to each other at the corners of the tank. Furthermore, a triangular reinforcing gusset plate 7 is provided in the AM part C2 in the tank corresponding to the interconnection part of the reinforcing beam 6.
is installed. Additionally, a bushing 8 is attached to the upper tank (3 inches).

この」；うＣ二構成された変圧器タンク２の外周壁（：
溶接固着された補強ビーム６は変圧器タンク２内ｌ二充
與される絶縁油のＡ空注′前処理時Ｃ二おける真空外圧
（二対して充分な曲げ剛性を有している。This is the outer circumferential wall of the transformer tank 2, which is composed of C2 (:
The welded reinforcing beam 6 has sufficient bending rigidity against the vacuum external pressure (C2) during the pretreatment of insulating oil (A) to be filled into the transformer tank (2).

さら（二、補強と−ム６の両端部は、補強ガセット板７
によシ、その端部剛性を高め、変形を抑ｆｌｉ＋）する
よう１：計られている。Furthermore, both ends of the reinforcing arm 6 are reinforced with reinforcing gusset plates 7.
In addition, it is designed to increase the rigidity of the end and suppress deformation.

このような油、大変圧器（二おｈて内部事故が発生し、
タンク内圧が上昇した場合上部タンク３と下部タンク４
の接合フランジ部は、その全周（二装置された複数個の
Ｃ形補強材５（二より開口変形が抑制されるがタンク２
は、その外周壁に溶接固着された補強ビーム６の曲げ剛
性（二比例した膨らみ変形を生じる。その際のタンク角
部の膨らみ変形状況を第３図（＝示す。タンク角部はそ
の内面に取付けられた補強ガセット板７（二より補強ガ
セット板７の端部よｐ急激に剛性が高められているため
、補強ガセット板７の端部よ勺大きな膨らみ変形が生じ
ておｐｌそのため端部溶接部Ａ）二大為な応力集中が生
じ亀裂が発生するおそれがある。この亀裂はタンク側板
自身をも損傷し、さら（二進展開口し高温のガスあるい
は、油の噴出に至るおそれがある。Such oil, large pressure
If the tank internal pressure rises, the upper tank 3 and lower tank 4
The joint flange part of the tank 2 has a plurality of C-shaped reinforcing members 5 installed on its entire circumference (2) to suppress opening deformation.
The bending rigidity of the reinforcing beam 6 welded to the outer circumferential wall (proportional bulge deformation occurs). The bulge deformation situation of the tank corner at that time is shown in Figure 3 (=). The attached reinforcing gusset plate 7 (as the rigidity of the end of the reinforcing gusset plate 7 is rapidly increased, a large bulge deformation occurs at the end of the reinforcing gusset plate 7). Part A) There is a risk that stress concentration will occur and cracks will occur.These cracks may also damage the tank side plate itself, and may open up and cause hot gas or oil to spout out.

〔発明の目的〕[Purpose of the invention]

／ 不発明は上記の点に鑑み油入変圧器の内部事故時の内圧
上昇（二対しタンク破壊を防止し噴油、火災等の二次的
災壺を防止し得る油入電器タンクを提供することを目的
とする。/ In view of the above points, we have devised an oil-filled electrical tank that can prevent the internal pressure from rising in the event of an internal accident in an oil-filled transformer (2), prevent the tank from breaking, and prevent secondary disasters such as oil spills and fires. The purpose is to

〔発明の櫃要〕[A chest of inventions]

この目的を連成−するため本発明は、油入゛磁器本体と
絶縁油を１１ス納する油入電器タンク艦−おいてその外
周壁（二痔接固着された補強ビーム相互の連結、３１Ｓ
に対応するタンク内角隅部（二、固接する部分円間膜の
ｆ＋ｌｉ強板を取付けることシニより、タンク内に充填
する絶縁油の真空注油処理時の真空外圧（二対し充分な
曲げｌ１１１性を与えると共に、内部事故時のタンク内
圧に対し、大きな膨らみ変形を与え、しかも局部的な応
力集中をさけよってタンク破壊を防止するようにしたこ
とを特徴とする。In order to achieve this object, the present invention has been developed to provide an oil-filled electrical tank ship that stores an oil-filled porcelain body and insulating oil in 11 spaces, and the outer circumferential wall (interconnection of two reinforcing beams fixed together, 31 spaces).
By attaching the f + li strong plate of the partial circular membrane that is firmly attached to the inner corner of the tank corresponding to The present invention is characterized in that it provides large bulging deformation to the internal pressure of the tank in the event of an internal accident, and prevents tank destruction by avoiding local stress concentration.

〔発明の実施例〕[Embodiments of the invention]

」ユ下本発明を第４図、第５図、第６図（二より説明す
る。第４図は本発明の構成（二なるタンク角部の補強構
成士示す要部詳細図で６９第５図は真空注油処理時の貞
空外圧砿二対するタンク角部変形状況を、第６　＋Ａは
タンク内圧上昇時のタンク角部変形状況を示す。The present invention will be explained from Fig. 4, Fig. 5, and Fig. 6 (Fig. 2). The figure shows the deformation of the corner of the tank when the internal pressure of the tank increases during vacuum lubrication, and the figure 6+A shows the deformation of the tank corner when the internal pressure of the tank increases.

下部タンク４の外周壁に溶接固着された補強ビーム６相
互が連結されたタンク角の内隅１１１≦には、そのタン
ク内隅（二内接する部分円１笥殻状の補強板９が固着さ
れている。A reinforcing plate 9 in the shape of a shell is fixed to the inner corner 111≦ of the tank corner where the reinforcing beams 6 are welded and fixed to the outer peripheral wall of the lower tank 4. ing.

このよう（二祷成された油入重器タンク２において、そ
の内部）二充填する絶縁油の真空注油処理時の真空外圧
が作用する場合、タンク角部叱）変形状況は、第５図１
＝示す通りである。′）まり、タンク内隅部（二数付け
られた部分円筒威状の補強板９はその曲率半径が縮小し
補強ビーム端部の剛性を篩め、よって補強ビームの変形
を抑制する。In this way (in the oil-filled heavy equipment tank 2, when the vacuum external pressure is applied during the vacuum lubrication process of the insulating oil to be filled twice), the deformation situation (at the corner of the tank) is shown in Figure 5-1.
=As shown. ') The radius of curvature of the reinforcing plate 9 in the shape of a partially cylindrical tank at the inner corner of the tank (numbered twice) is reduced to reduce the rigidity of the end of the reinforcing beam, thereby suppressing deformation of the reinforcing beam.

又、内部事故時のタンク内圧上昇（二対しては、第６図
（二示すようＣニタンク角部は変形する。っ−まυ、タ
ンク内隅部（二項付けられた１＄分円筒殻状の補強板９
はその曲率半径が増大し大きな膨らみ変形を得ることが
出来ると共（二、タンク内隅部Ｂの応力集中を緩和する
ことが出来る。In addition, when the tank internal pressure rises in the event of an internal accident (2), the corner of the tank deforms as shown in Figure 6 (2). reinforcing plate 9
The radius of curvature increases and a large bulging deformation can be obtained (2. The stress concentration at the inner corner B of the tank can be alleviated.

〔発明の効果〕〔Effect of the invention〕

以上説明したよう（二、本発明の構成じなる油入電器タ
ンクでは、その内部に絶縁、油を注油する除の真空外圧
題二対してその変形を所定の値以下（二抑制すべき充分
な曲げ剛性を与えると共（二、内部事故時の内圧上ｙ＋
＜′″一対しては最も面接的な圧力上昇緩和効果をイυ
ることの出来るタンク膨張量を増大せしめると共に、そ
の大？５な膨らみ変形によシ局郡的な応力東中を避け、
よってタンク破壊を未然（二防止することが出来る。。As explained above (2. In the oil-filled electrical equipment tank of the present invention, the deformation should be kept below a predetermined value (2. Provides bending rigidity (2. Internal pressure y+ in the event of an internal accident)
＜′″On the other hand, it has the most direct pressure increase mitigation effect.
In addition to increasing the amount of tank expansion that can be achieved, 5. Avoid localized stress due to bulging deformation,
Therefore, tank destruction can be prevented.

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

坐１図、第２図は従来の変圧器構造を示す上部前面図と
１＋１１萌而図、第３図はその要部説明口、第４図は不
発明の一実施例（二なる油入峨器タンク角郡詳細図、第
５図、第６図はそれぞれλ全外圧時および内圧上昇時の
タンク角部変形状況を示す説明図でおる。 １・・・変圧器本体　２・・・変圧器タンク３・・・上
［１（タンク　４・・・下部タンク５・・・Ｃ形補強月
　６・・・補強ビーム７・・・補強ガセット板　８・・
・プツ７ング９・・・補強板 代理人　弁理士　則　近　′１Ｍ　侑（ほか１名）第４
図 ６ 第５図 第６図Figures 1 and 2 are an upper front view and a 1+11 diagram showing the structure of a conventional transformer, Figure 3 is an explanation of its main parts, and Figure 4 is an embodiment of the invention (second oil-filled Detailed drawings of the tank corners, Figures 5 and 6 are explanatory diagrams showing the deformation of the tank corners when the external pressure is at full lambda and when the internal pressure increases, respectively. 1...Transformer body 2...Transformer Tank 3...Top [1 (Tank 4...Lower tank 5...C-shaped reinforcement moon 6...Reinforcement beam 7...Reinforcement gusset plate 8...
・Puts 7 ng 9... Reinforcement board agent Patent attorney Chika '1M Yu (and 1 other person) No. 4
Figure 6 Figure 5 Figure 6

Claims (1)

【特許請求の範囲】[Claims] 内部（二油入電器季体と絶縁油を収納し、その外周船に
ｉ（数本の補強ビームが清液固着されている油入ｈＩｌ
器タンク（二おいて、前ｉ己補強ビーム相互がタンク外
周で連結部％Ｊされた対応位置のタンク内面角隅部（二
内接する部分円筒殻の補強板を固着したことをｑ５ｆ徴
とする油入磁器タンク。Inside (two oil-filled electrical appliances and insulating oil are stored, and on the outer circumferential vessel there is an oil-filled hIl with several reinforcing beams fixed with fresh liquid).
2, the reinforcing beams are connected to each other on the outer periphery of the tank at the corresponding position of the inner corner corner of the tank (2) The reinforcing plate of the inscribed partial cylindrical shell is fixed to q5f. Oil-filled porcelain tank.