JP7336950B2 - Pressure vessel and gas-insulated switchgear using the same - Google Patents

Pressure vessel and gas-insulated switchgear using the same Download PDF

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JP7336950B2
JP7336950B2 JP2019184246A JP2019184246A JP7336950B2 JP 7336950 B2 JP7336950 B2 JP 7336950B2 JP 2019184246 A JP2019184246 A JP 2019184246A JP 2019184246 A JP2019184246 A JP 2019184246A JP 7336950 B2 JP7336950 B2 JP 7336950B2
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pressure vessel
reinforcing plate
reinforcing
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wall
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JP2021061678A (en
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哉有 高橋
直明 井上
英二 森藤
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Mitsubishi Electric Corp
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Description

本願は、圧力容器、およびこれを用いたガス絶縁開閉装置に関するものである。 The present application relates to a pressure vessel and a gas-insulated switchgear using the same.

圧力容器は、金属板の壁体を溶接により接合して形成された容器である。絶縁性ガスが封入された圧力容器の内部には遮断器等の機器が収容され、遮断器操作機器などとともにガス絶縁開閉装置が形成される。圧力容器の内部は、一般に０．０３から０．６ＭＰａ程度の圧力に調整され、絶縁性能、および消弧性能に優れた環境が維持される。 A pressure vessel is a vessel formed by joining metal plate walls by welding. Equipment such as a circuit breaker is housed inside a pressure vessel filled with an insulating gas, and a gas-insulated switchgear is formed together with a circuit breaker operating device. The pressure inside the pressure vessel is generally adjusted to about 0.03 to 0.6 MPa to maintain an environment with excellent insulation performance and arc extinguishing performance.

圧力容器の内部のガス圧力を上昇させると、圧力容器の壁体もしくは溶接された箇所にかかる応力が増加する。ガス圧力が過大になると局部的に周囲よりも高い応力が発生している箇所（以下、応力集中部と記す）において破壊が生じるおそれがあるため、応力集中部での圧力容器の破壊を防止するという課題が生じていた。 Increasing the gas pressure inside the pressure vessel increases the stress on the walls or welds of the pressure vessel. If the gas pressure becomes excessive, there is a risk that the pressure vessel will be destroyed in places where stress is locally higher than the surroundings (hereafter referred to as stress concentration areas). There was a problem.

この課題を解決するために、圧力容器の壁体の内面もしくは外面、あるいは双方に板部材もしくは曲げ加工を施した板部材などを補強部材として溶接した補強構造が開示されている。近年、圧力容器の薄肉化、さらにはガス絶縁開閉装置内部の省スペース化および配電盤の機器集約に起因した圧力容器の外形複雑化が進んでいるため、それに伴った補強構造の複雑化、補強部材点数の増加、溶接時間の増加が生じており、補強部材を付加する作業時間が増大していた。また、圧力容器の壁体および溶接された箇所に加え、補強部材点数の増加および外形複雑化に伴い、補強部材が溶接された箇所の近傍、および圧力容器のＲ部もしくは角部なども応力集中部となり、応力集中部が増加していた。補強部材を付加する作業時間を改善した補強構造としては、圧力容器の壁体の内面に設ける補強部材を、壁体に設けたスリット状のほぞ穴を利用して、外面から溶接して固定する構成が開示されている（例えば特許文献１参照）。 In order to solve this problem, a reinforcing structure is disclosed in which a plate member or a bent plate member is welded as a reinforcing member to the inner surface, the outer surface, or both of the walls of the pressure vessel. In recent years, pressure vessels have become thinner, space-saving inside gas-insulated switchgear, and more complex external shapes of pressure vessels due to the integration of equipment in switchboards. The number of points increased, the welding time increased, and the work time for adding reinforcing members increased. In addition to the wall and welded parts of the pressure vessel, as the number of reinforcing members increases and the external shape becomes more complicated, stress concentration occurs in the vicinity of the welded reinforcing members and the R part or corner of the pressure vessel. It became a part, and the stress concentration part increased. As a reinforcing structure that reduces the work time for adding reinforcing members, the reinforcing members provided on the inner surface of the wall of the pressure vessel are fixed by welding from the outer surface using the slit-shaped mortise provided in the wall. A configuration has been disclosed (see Patent Document 1, for example).

特開２０１７－１３５７６２号公報JP 2017-135762 A

上記特許文献１においては、内面側に設ける補強部材を外面側から溶接して固定するため、作業の効率を悪化させることはない。しかしながら、補強部材が溶接された箇所に起因して生じた応力集中部、もしくは圧力容器の外形複雑化で生じた圧力容器のＲ部または角部に起因して生じた応力集中部に対する強度対策が必要になるという課題があった。 In Patent Document 1, since the reinforcing member provided on the inner surface side is welded and fixed from the outer surface side, the working efficiency is not deteriorated. However, there is no strength countermeasure against the stress concentration part caused by the welded part of the reinforcing member, or the stress concentration part caused by the R part or the corner part of the pressure vessel caused by the complicated outer shape of the pressure vessel. I had a problem with the need.

本願は前記のような課題を解決するためになされたものであり、壁体における溶接された箇所の周囲に生じた応力集中部の応力値を低減した圧力容器を得ることを目的としている。 The present application has been made to solve the problems described above, and an object thereof is to obtain a pressure vessel in which the stress value of the stress concentration portion generated around the welded portion of the wall body is reduced.

本願に開示される圧力容器は、複数の金属板の壁体が溶接により接合されて形成された圧力容器であって、壁体における溶接された箇所の周囲の一部を含む位置に切欠きを有し、平板状に形成された補強板を、壁体に備え、切欠きを有した補強板は、補強板の外周に沿って１枚の前記壁体に溶接され、切欠きは、補強板の外周から補強板の内側に引っ込む凹部であり、凹部は、溶接された箇所に対向しているものである。



The pressure vessel disclosed in the present application is a pressure vessel formed by joining a wall made of a plurality of metal plates by welding, and has a notch at a position including a part of the periphery of the welded part in the wall. A reinforcing plate formed in a flat plate shape is provided in the wall, and the reinforcing plate having a notch is welded to the one wall along the outer periphery of the reinforcing plate, and the notch is the reinforcing plate The recess is recessed from the outer periphery of the reinforcing plate to the inside of the reinforcing plate, and the recess faces the welded portion .

本願に開示される圧力容器によれば、壁体における溶接された箇所の周囲に生じた応力集中部の応力値を低減できる。 According to the pressure vessel disclosed in the present application, it is possible to reduce the stress value of the stress concentration portion generated around the welded portion of the wall.

実施の形態１に係る圧力容器の外観を示す斜視図である。1 is a perspective view showing the appearance of a pressure vessel according to Embodiment 1; FIG. 実施の形態１に係る圧力容器に操作機器取付板を付与した斜視図である。FIG. 2 is a perspective view of the pressure vessel according to the first embodiment provided with an operating device mounting plate; 実施の形態１に係るガス絶縁開閉装置の概略の例を示す断面図である。1 is a cross-sectional view showing a schematic example of a gas-insulated switchgear according to Embodiment 1. FIG. 実施の形態１に係る圧力容器の補強板の例を示す平面図である。4 is a plan view showing an example of a reinforcing plate of the pressure vessel according to Embodiment 1; FIG. 実施の形態１に係る圧力容器の一部の側面図である。1 is a side view of part of a pressure vessel according to Embodiment 1; FIG. 図５の一点鎖線Ａ－Ａにおける断面図である。FIG. 6 is a cross-sectional view along the dashed-dotted line AA in FIG. 5; 実施の形態１に係る圧力容器の補強板の溶接部を示す図である。4 is a diagram showing a welded portion of a reinforcing plate of the pressure vessel according to Embodiment 1; FIG. 実施の形態２に係る圧力容器の外観を示す斜視図である。FIG. 8 is a perspective view showing the appearance of a pressure vessel according to Embodiment 2; 実施の形態２に係る圧力容器の補強板の例を示す平面図である。FIG. 11 is a plan view showing an example of a reinforcing plate of a pressure vessel according to Embodiment 2; 実施の形態２に係る圧力容器の一部の側面図である。FIG. 11 is a side view of part of the pressure vessel according to Embodiment 2; 実施の形態２に係る別の圧力容器の一部の側面図である。FIG. 11 is a side view of part of another pressure vessel according to Embodiment 2; 実施の形態３に係る圧力容器の外観を示す斜視図である。FIG. 11 is a perspective view showing the appearance of a pressure vessel according to Embodiment 3; 実施の形態３に係る圧力容器の補強板の例を示す平面図である。FIG. 11 is a plan view showing an example of a reinforcing plate of a pressure vessel according to Embodiment 3; 実施の形態３に係る圧力容器の正面図である。FIG. 11 is a front view of a pressure vessel according to Embodiment 3; 実施の形態３に係る圧力容器の側面図である。FIG. 11 is a side view of a pressure vessel according to Embodiment 3; 実施の形態３に係る圧力容器の背面図である。FIG. 11 is a rear view of a pressure vessel according to Embodiment 3;

以下、本願の実施の形態による圧力容器、およびこれを用いたガス絶縁開閉装置を図に基づいて説明する。各図において同一、または相当部材、部位については同一符号を付して説明する。 A pressure vessel according to an embodiment of the present application and a gas-insulated switchgear using the same will be described below with reference to the drawings. In each figure, the same or corresponding members and parts are denoted by the same reference numerals.

実施の形態１．
図１は実施の形態１に係る圧力容器１の外観を示す斜視図、図２は圧力容器１に操作機器取付板１１を付与した斜視図、図３は実施の形態１に係る圧力容器１を用いたガス絶縁開閉装置１００の概略の例を示す断面図である。ガス絶縁開閉装置１００は、図３に示すように、圧力容器１と、圧力容器１の内部に収容された遮断器３０と、圧力容器１の外部に設けられた遮断器操作機器３１と、圧力容器１と接続された他の機器とを備えた装置である。圧力容器１には圧力の調整された絶縁性ガスが封入されており、圧力容器１の内部は絶縁性能、および消弧性能に優れた環境が維持されている。 Embodiment 1.
FIG. 1 is a perspective view showing the appearance of the pressure vessel 1 according to Embodiment 1, FIG. 2 is a perspective view of the pressure vessel 1 provided with an operating device mounting plate 11, and FIG. 3 is the pressure vessel 1 according to Embodiment 1. It is a cross-sectional view showing an example of a schematic of the gas-insulated switchgear 100 used. As shown in FIG. 3, the gas-insulated switchgear 100 includes a pressure vessel 1, a circuit breaker 30 housed inside the pressure vessel 1, a circuit breaker operating device 31 provided outside the pressure vessel 1, and a pressure vessel 1. It is an apparatus comprising a container 1 and other connected equipment. The pressure vessel 1 is sealed with an insulating gas whose pressure is adjusted, and the environment inside the pressure vessel 1 is maintained with excellent insulation performance and arc extinguishing performance.

圧力容器１は、図１に示すように、前面部３、天井部４、背面部５、側面部６、床面部７から構成され、前面部３は開口している。この開口から、遮断器３０等の機器が圧力容器１の内部に挿入され、設置される。この開口は、図２に示すように、遮断器３０等の機器の設置後に、遮断器操作機器３１（図２では図示せず）を取り付けた操作機器取付板１１で閉じられる。操作機器取付板１１は、例えば板厚が１２～２０ｍｍ程度で鉄もしくはステンレスなどの金属で作製された厚い板であり、操作機器取付板１１が圧力容器１の前面部分の補強の代わりとなるため、前面部分に補強部材は設けられていない。圧力容器１を構成する各要素は壁体２であり、圧力容器１は、複数の金属板の壁体２が溶接により接合されて形成された容器である。壁体２は、天井部４であるひとつの壁体２１と側面部６である他の壁体２２についてのみ符号を付して以下説明する。壁体２は、例えば板厚が３～９ｍｍ程度で、鉄もしくはステンレスで作製された板である。圧力容器１は直方体ではなく、ガス絶縁開閉装置１００内部の省スペース化のために背面部５を突出した形状で設けているが、圧力容器１の形状はこの形状に限るものではない。 As shown in FIG. 1, the pressure vessel 1 is composed of a front portion 3, a ceiling portion 4, a rear portion 5, a side portion 6 and a floor portion 7, and the front portion 3 is open. A device such as the circuit breaker 30 is inserted into the pressure vessel 1 through this opening and installed. As shown in FIG. 2, this opening is closed by the operating device mounting plate 11 to which the circuit breaker operating device 31 (not shown in FIG. 2) is mounted after the device such as the circuit breaker 30 is installed. The operation device mounting plate 11 is, for example, a thick plate with a thickness of about 12 to 20 mm and made of metal such as iron or stainless steel, and the operation device mounting plate 11 serves as a substitute for reinforcing the front portion of the pressure vessel 1. , the front portion is not provided with a reinforcing member. Each element constituting the pressure vessel 1 is a wall body 2, and the pressure vessel 1 is a vessel formed by joining a plurality of metal plate wall bodies 2 by welding. Of the walls 2, only one wall 21, which is the ceiling portion 4, and another wall 22, which is the side portion 6, will be described with reference numerals. The wall body 2 is, for example, a plate having a thickness of about 3 to 9 mm and made of iron or stainless steel. The pressure vessel 1 is not a rectangular parallelepiped, and is provided in a shape in which the rear portion 5 protrudes in order to save space inside the gas-insulated switchgear 100, but the shape of the pressure vessel 1 is not limited to this shape.

圧力容器１の補強構造について説明する。圧力容器１の内部のガス圧力が過大になると、圧力容器１の壁体２、もしくは壁体２と壁体２との間の溶接された箇所などにかかる応力が増加し、局部的に周囲よりも高い応力が発生している箇所（以下、応力集中部と記す）において破壊が生じるおそれがある。また近年、圧力容器１の薄肉化、さらにはガス絶縁開閉装置１００の内部の省スペース化および配電盤の機器集約に起因した圧力容器１の外形複雑化が進んでいることから、壁体２における溶接された箇所の周囲に位置した応力集中部として、補強構造が溶接された箇所に起因して生じた応力集中部、および圧力容器１のＲ部または角部に起因して生じた応力集中部が増加している。そのため、新たに生じた応力集中部も含めて、それぞれの応力集中部に対して強度対策のために補強構造が溶接して設けられる。圧力容器１は、補強構造として、補強部材８および補強板９を備える。補強部材８は、断面形状が例えば１６ｍｍ×１６ｍｍの正方形である四角柱状の部材であり、複数の壁体２のうちのひとつの壁体２１の外面２ａに溶接されている。なお、本実施の形態では、ひとつの壁体２１の外面２ａにのみ補強部材８を設けた例を示したがこれに限るものではなく、背面部５、側面部６などの異なる壁体２の外面、もしくは圧力容器１の内面に補強部材８を配置しても構わない。また、補強部材８の断面の大きさもこれに限るものではなく、断面の大きさをさらに大きくしても構わない。 A reinforcing structure for the pressure vessel 1 will be described. When the gas pressure inside the pressure vessel 1 becomes excessive, the stress applied to the wall 2 of the pressure vessel 1, or the welded portion between the walls 2 and 2, etc. There is a possibility that fracture may occur at a portion where a high stress is generated (hereinafter referred to as a stress concentration portion). In recent years, the pressure vessel 1 has become thinner, and the outer shape of the pressure vessel 1 has become more complicated due to the space saving inside the gas-insulated switchgear 100 and the integration of equipment on the switchboard. As the stress concentration parts located around the welded parts, the stress concentration parts caused by the welded parts of the reinforcing structure and the stress concentration parts caused by the R part or the corner part of the pressure vessel 1 are It has increased. Therefore, a reinforcing structure is welded to each of the stress concentration portions, including the newly generated stress concentration portion, for strength measures. The pressure vessel 1 includes reinforcing members 8 and reinforcing plates 9 as reinforcing structures. The reinforcing member 8 is a quadrangular prism member having a square cross section of 16 mm×16 mm, for example, and is welded to the outer surface 2 a of one wall 21 of the plurality of walls 2 . In this embodiment, an example in which the reinforcing member 8 is provided only on the outer surface 2a of one wall 21 is shown, but the present invention is not limited to this. A reinforcing member 8 may be arranged on the outer surface or the inner surface of the pressure vessel 1 . Also, the size of the cross section of the reinforcing member 8 is not limited to this, and the size of the cross section may be made larger.

次に、本願の要部である補強板９について説明する。図４は図１に示した実施の形態１に係る圧力容器１の側面部６に設けた補強板９の例を示す平面図、図５は補強板９と補強板９の周囲を示した圧力容器１の一部の側面図、図６は図５の一点鎖線Ａ－Ａにおける断面図、図７は圧力容器１の補強板９の溶接部１２を示す図である。本実施の形態における補強板９は、補強部材８が溶接された箇所に起因して生じた応力集中部１０に対する強度対策として設けるものである。補強板９は、図４に示すように、切欠き部９ａを備えた鉄などの金属の板材である。補強板９の厚みは、壁体２の板厚と同等、もしくは壁体２の板厚以下の厚さである。補強板９は、図５に示すように、壁体２における溶接された箇所の周囲の応力集中部１０の一部を含む位置に切欠きを有している。切欠き部９ａの形状および大きさは、切欠き部９ａの周囲の補強板９が取り囲む応力集中部１０の応力値により変更される。応力集中部１０の応力値は、解析および実測の双方を実施して確認され、応力値が低減されるように切欠き部９ａが設けられる。本実施の形態の場合、補強板９の面積と切欠き部９ａの面積比は、およそ５対２となるように設計されており、応力集中部１０の応力値は低減される。 Next, the reinforcing plate 9, which is the essential part of the present application, will be described. FIG. 4 is a plan view showing an example of the reinforcing plate 9 provided on the side surface portion 6 of the pressure vessel 1 according to Embodiment 1 shown in FIG. 1, and FIG. FIG. 6 is a side view of part of the vessel 1, FIG. 6 is a sectional view taken along the dashed line AA in FIG. 5, and FIG. The reinforcing plate 9 in the present embodiment is provided as a strength countermeasure against the stress concentrated portion 10 caused by the welded portion of the reinforcing member 8 . As shown in FIG. 4, the reinforcing plate 9 is a metal plate material such as iron having a notch 9a. The thickness of the reinforcing plate 9 is equal to or less than the thickness of the wall 2 . As shown in FIG. 5, the reinforcing plate 9 has a notch at a position including a portion of the stress concentration portion 10 around the welded portion of the wall 2. As shown in FIG. The shape and size of the notch 9a are changed according to the stress value of the stress concentration portion 10 surrounded by the reinforcing plate 9 around the notch 9a. The stress value of the stress concentration portion 10 is confirmed by both analysis and actual measurement, and the notch portion 9a is provided so as to reduce the stress value. In the case of this embodiment, the ratio of the area of the reinforcing plate 9 to the area of the notch 9a is designed to be about 5:2, and the stress value of the stress concentrated portion 10 is reduced.

本実施の形態では、図５に示すように、応力集中部１０は、補強部材８が取り付けられたひとつの壁体２１に接合された他の壁体２２の外面２ａの補強部材８に隣接した箇所である。応力集中部１０は補強部材８の付け根であり、補強部材８が溶接された箇所に起因して生じた応力集中部１０である。応力集中部１０を含む位置に切欠きを有する補強板９は、補強板９の外周に沿って他の壁体２２の外面２ａに溶接されている。図７に示した破線部分が、補強板９の溶接された箇所である溶接部１２である。図６の断面において、溶接部１２は斜線で示した溶接部１２ａと溶接部１２ｂである。従来の板状の補強部材は、切り欠いた箇所を有さない矩形状で用いられていた。矩形状の補強部材と圧力容器との接合部分の長さ（以下、溶接距離Ａと記す）は、矩形の外周の距離であった。補強板９と圧力容器１との接合部分の長さ（以下、溶接距離Ｂと記す）は、溶接距離Ａと比較して、補強板９に切欠き部９ａを設けているため、図６の二点鎖線で囲まれた箇所のほぼ２倍の距離だけ長くなる。例えば、１０ｃｍ×１７ｃｍの矩形状の補強部材の溶接距離Ａが５０ｃｍの場合、溶接距離Ｂはおよそ７０ｃｍとなるため、溶接距離Ｂは溶接距離Ａに対して４０％程度長くなっている。溶接距離Ｂが溶接距離Ａに対して増加するということは、補強板９と圧力容器１との接合距離が従来と比較して増加することになる。その結果、従来と比較して応力集中部の強度は向上する。また、従来の矩形状の補強部材では、中央部分が圧力容器と全く接合されていなかったが、補強板９は従来の補強板の中央の位置も含めて圧力容器１と接合されているため、応力集中部の強度は向上する。 In this embodiment, as shown in FIG. 5, the stress concentration portion 10 is adjacent to the reinforcing member 8 on the outer surface 2a of another wall 22 joined to one wall 21 to which the reinforcing member 8 is attached. It is a place. The stress concentration portion 10 is the root of the reinforcing member 8 and is the stress concentration portion 10 caused by the welded portion of the reinforcing member 8 . A reinforcing plate 9 having a notch at a position including the stress concentration portion 10 is welded to the outer surface 2a of another wall 22 along the outer circumference of the reinforcing plate 9. As shown in FIG. A broken line portion shown in FIG. 7 is a welded portion 12 where the reinforcing plate 9 is welded. In the cross section of FIG. 6, the welded portions 12 are the welded portions 12a and 12b indicated by diagonal lines. A conventional plate-shaped reinforcing member has been used in a rectangular shape with no cutouts. The length of the joint portion between the rectangular reinforcing member and the pressure vessel (hereinafter referred to as welding distance A) was the outer circumference of the rectangle. The length of the joint portion between the reinforcing plate 9 and the pressure vessel 1 (hereinafter referred to as the welding distance B) is compared with the welding distance A because the reinforcing plate 9 is provided with the notch 9a. It is longer by approximately twice the distance of the portion surrounded by the two-dot chain line. For example, when the welding distance A of a rectangular reinforcing member of 10 cm×17 cm is 50 cm, the welding distance B is about 70 cm, so the welding distance B is longer than the welding distance A by about 40%. The fact that the welding distance B is increased with respect to the welding distance A means that the bonding distance between the reinforcing plate 9 and the pressure vessel 1 is increased compared to the conventional case. As a result, the strength of the stress concentrated portion is improved compared to the conventional art. In addition, in the conventional rectangular reinforcing member, the central portion was not joined to the pressure vessel at all, but the reinforcing plate 9 is joined to the pressure vessel 1 including the central position of the conventional reinforcing plate, The strength of the stress concentrated portion is improved.

以上のように、この圧力容器１は、壁体２における溶接された箇所の周囲で、局部的に周囲よりも高い応力が発生している箇所である応力集中部１０の一部を含む位置に切欠きを有する補強板９が圧力容器１の壁体２に溶接されているため、圧力容器１の全体の肉厚を厚くすることなく、応力集中部１０の応力値を低減して強度対策を施すことができる。また、補強板９を切り欠いたことで、補強板９は矩形状の補強部材の中央部分であった箇所も含めて圧力容器１と接合されているため、応力集中部１０の強度を向上させることができる。また、補強板９は、補強板９の外周に沿って圧力容器１の壁体２に溶接されているため、補強板９と圧力容器１との接合距離が増加し、応力集中部１０の強度を向上させることができる。また、補強部材８が取り付けられたひとつの壁体２１に接合された他の壁体２２の外面２ａの補強部材８に隣接した箇所が応力集中部１０である場合、補強部材８の付け根が応力集中部１０であり、この溶接された箇所に起因して生じた応力集中部１０を含む位置に切欠きを有する補強板９が圧力容器１の壁体２に溶接されているため、応力集中部１０の応力値を低減することができる。また、ガス絶縁開閉装置１００は、内部に遮断器３０を収容した圧力容器１に、補強板９を備えているため、圧力容器１の応力集中部１０に対する強度を向上させることができる。 As described above, the pressure vessel 1 is placed around the welded portion of the wall 2 at a position including a part of the stress concentration portion 10, which is a portion where a higher stress than the surroundings locally occurs. Since the reinforcing plate 9 having the notch is welded to the wall 2 of the pressure vessel 1, the stress value of the stress concentration portion 10 is reduced without increasing the thickness of the pressure vessel 1 as a whole, thereby improving the strength. can apply. In addition, by notching the reinforcing plate 9, the reinforcing plate 9 is joined to the pressure vessel 1 including the central portion of the rectangular reinforcing member, so that the strength of the stress concentration portion 10 is improved. be able to. Further, since the reinforcing plate 9 is welded to the wall 2 of the pressure vessel 1 along the outer circumference of the reinforcing plate 9, the joint distance between the reinforcing plate 9 and the pressure vessel 1 increases, and the strength of the stress concentration portion 10 increases. can be improved. In addition, when the portion adjacent to the reinforcing member 8 of the outer surface 2a of the other wall 22 joined to the one wall 21 to which the reinforcing member 8 is attached is the stress concentration portion 10, the stress is applied to the base of the reinforcing member 8. Since the reinforcing plate 9 having a notch at a position including the stress concentration portion 10 caused by the welded portion is welded to the wall 2 of the pressure vessel 1, the stress concentration portion Ten stress values can be reduced. Moreover, since the gas-insulated switchgear 100 includes the reinforcing plate 9 in the pressure vessel 1 containing the circuit breaker 30 therein, the strength of the pressure vessel 1 against the stress concentration portion 10 can be improved.

溶接距離を長くすることは、補強板の数を増やしてそれぞれの補強板の外周を溶接することで可能であるが、補強板の数の増加により各補強板と圧力容器との溶接時の位置あわせ時間が増加してしまう。また、補強板の増加に伴い個々の補強板の大きさが小さくなるため溶接時に生じるひずみの影響が大きくなり、溶接ひずみの修正時間が増加してしまう。切欠き部９ａを備えた補強板９であれば、補強板を分割して補強板の数を増やすことなく一体物で溶接距離を長くすることができるため、補強板の位置あわせの時間および溶接ひずみの修正時間を短縮でき、作業を効率よく行うことができる。 It is possible to increase the welding distance by increasing the number of reinforcing plates and welding the outer circumference of each reinforcing plate. The matching time increases. In addition, as the number of reinforcing plates increases, the size of each reinforcing plate decreases, so the influence of strain generated during welding increases, and the time required to correct the welding strain increases. If the reinforcing plate 9 is provided with the notch 9a, the welding distance can be increased as a single piece without dividing the reinforcing plate to increase the number of reinforcing plates. The distortion correction time can be shortened, and work can be performed efficiently.

以上では、図１において手前側の側面部６に設けられた補強板９について説明したが補強板９の配置はこれに限るものではなく、側面部６と対向し、図１では内面２ｂが示された側面部の補強部材８の付け根にも補強板９を取り付けても構わない。また、背面部５、側面部６などの壁体の外面に補強部材８が設けられた場合、追加して設けた補強部材８の付け根にも補強板９を取り付けて構わない。また、補強板９を溶接して側面部６に取り付ける例について示したが、補強板９の取付方法はこれに限るものではなく、ロウ付けして取り付けても構わない。 Although the reinforcing plate 9 provided on the front side portion 6 in FIG. 1 has been described above, the arrangement of the reinforcing plate 9 is not limited to this. The reinforcing plate 9 may also be attached to the base of the reinforcing member 8 on the side surface portion. Further, when the reinforcing member 8 is provided on the outer surface of the wall such as the back surface portion 5 and the side surface portion 6, the reinforcing plate 9 may be attached to the base of the additionally provided reinforcing member 8 as well. Moreover, although an example of attaching the reinforcing plate 9 to the side surface portion 6 by welding has been shown, the method of attaching the reinforcing plate 9 is not limited to this, and may be attached by brazing.

実施の形態２．
実施の形態２に係る圧力容器１について説明する。図８は圧力容器１の外観を示す斜視図、図９は圧力容器１の補強板１３の例を示す平面図、図１０は補強板１３と補強板１３の周囲を示した圧力容器１の一部の側面図である。実施の形態２に係る圧力容器１は、実施の形態１の構成に加えて、補強板１３を設けた構成になっている。 Embodiment 2.
A pressure vessel 1 according to Embodiment 2 will be described. 8 is a perspective view showing the appearance of the pressure vessel 1, FIG. 9 is a plan view showing an example of the reinforcing plate 13 of the pressure vessel 1, and FIG. is a side view of the part. The pressure vessel 1 according to the second embodiment has a configuration in which a reinforcing plate 13 is provided in addition to the configuration of the first embodiment.

補強板１３は、圧力容器１のＲ部１ａに起因して生じた応力集中部１０ａに対する強度対策として設けるものである。補強板１３は、図９に示すように、切欠き部１３ａを備えた鉄などの金属の板材である。補強板１３の厚みは、壁体２の板厚と同等、もしくは壁体２の板厚以下の厚さである。 The reinforcing plate 13 is provided as a strength countermeasure against the stress concentrated portion 10a caused by the R portion 1a of the pressure vessel 1. As shown in FIG. The reinforcing plate 13 is, as shown in FIG. 9, a metal plate material such as iron having a notch 13a. The thickness of the reinforcing plate 13 is equal to or less than the thickness of the wall 2 .

本実施の形態では、図１０に示すように、応力集中部１０ａは、圧力容器１の周縁部に形成されたＲ部１ａに隣接した箇所である。応力集中部１０ａを含む位置に切欠きを有する補強板１３は、補強板１３の外周に沿って壁体２からなる側面部６に溶接されている。矩形で板状の補強部材と圧力容器との溶接距離Ａと比較して、補強板１３と圧力容器１との溶接距離Ｂは、補強板１３に切欠き部１３ａを設けているため、溶接距離Ｂのほうが長くなる。溶接距離Ｂが溶接距離Ａに対して増加するということは、補強板１３と圧力容器１との接合距離が従来と比較して増加することになる。その結果、従来と比較して応力集中部の強度は向上する。また、矩形状の補強部材では、１つの補強部材で圧力容器１のＲ部１ａに起因して生じた応力集中部１０ａに対する強度対策ができず、複数の矩形状の補強部材を用いる必要があった。しかしながら、補強板１３には切欠き部１３ａを設けているため、１つの補強板１３のみで応力集中部１０ａに対する強度対策を行うことができる。 In the present embodiment, as shown in FIG. 10, the stress concentration portion 10a is a portion adjacent to the R portion 1a formed in the peripheral portion of the pressure vessel 1. As shown in FIG. A reinforcing plate 13 having a notch at a position including the stress concentration portion 10a is welded to the side portion 6 formed of the wall 2 along the outer circumference of the reinforcing plate 13 . Compared with the welding distance A between the rectangular plate-shaped reinforcing member and the pressure vessel, the welding distance B between the reinforcing plate 13 and the pressure vessel 1 is the welding distance B is longer. The fact that the welding distance B is increased with respect to the welding distance A means that the bonding distance between the reinforcing plate 13 and the pressure vessel 1 is increased compared to the conventional case. As a result, the strength of the stress concentrated portion is improved compared to the conventional art. Further, with a rectangular reinforcing member, a single reinforcing member cannot provide strength measures against the stress concentration portion 10a caused by the R portion 1a of the pressure vessel 1, and it is necessary to use a plurality of rectangular reinforcing members. Ta. However, since the reinforcing plate 13 is provided with the cutout portion 13a, it is possible to take strength measures against the stress concentration portion 10a with only one reinforcing plate 13. FIG.

図１１は、実施の形態２に係る、補強板１３１と補強板１３１の周囲を示した別の圧力容器１の一部の側面図である。以上では、圧力容器１のＲ部１ａに起因して生じた応力集中部１０ａに対する強度対策として補強板１３を設けたが、圧力容器１の周縁部に形成された角部１ｂに起因して生じた応力集中部１０ｂに対する強度対策として別の補強板１３１を設けても構わない。応力集中部１０ｂを含む位置に切欠きを有する補強板１３１は、補強板１３１の外周に沿って壁体２からなる側面部６に溶接されている。補強板１３１においても、補強板１３の接合と同様に、補強板１３１と圧力容器１との接合距離は従来の補強部材の接合距離と比較して増加する。また、複数の補強板を接合させることなく、１つの補強板１３１のみで応力集中部１０ｂに対する強度対策を行うことができる。 FIG. 11 is a partial side view of another pressure vessel 1 showing a reinforcing plate 131 and the surroundings of the reinforcing plate 131 according to the second embodiment. In the above description, the reinforcing plate 13 is provided as a countermeasure against the stress concentrated portion 10a caused by the R portion 1a of the pressure vessel 1. Another reinforcing plate 131 may be provided as a strength countermeasure against the stress concentrated portion 10b. A reinforcing plate 131 having a notch at a position including the stress concentration portion 10b is welded to the side portion 6 made of the wall 2 along the outer circumference of the reinforcing plate 131 . In the reinforcing plate 131, similarly to the bonding of the reinforcing plate 13, the bonding distance between the reinforcing plate 131 and the pressure vessel 1 is increased as compared with the bonding distance of the conventional reinforcing member. In addition, strength measures against the stress concentration portion 10b can be taken with only one reinforcing plate 131 without joining a plurality of reinforcing plates.

以上のように、この圧力容器１は、補強板１３、１３１に切欠き部１３ａを設けているため、それぞれ１つの補強板１３、１３１のみで各応力集中部１０ａ、１０ｂの強度対策を行うことができ、補強板１３、１３１の取付作業を効率よく行うことができる。また、圧力容器１の周縁部に形成されたＲ部１ａもしくは角部１ｂに隣接した箇所が応力集中部１０ａ、１０ｂである場合、Ｒ部１ａもしくは角部１ｂに起因して生じた応力集中部１０ａ、１０ｂを含む位置に切欠きを有する補強板１３、１３１が圧力容器１の壁体２に溶接されているため、応力集中部１０ａ、１０ｂの応力値を低減して強度対策を施すことができる。 As described above, in the pressure vessel 1, the reinforcement plates 13 and 131 are provided with the notch portions 13a. , and the work of attaching the reinforcing plates 13 and 131 can be performed efficiently. Further, when the stress concentration portions 10a and 10b are located adjacent to the R portion 1a or the corner portion 1b formed in the peripheral portion of the pressure vessel 1, the stress concentration portion caused by the R portion 1a or the corner portion 1b Since the reinforcing plates 13 and 131 having notches at positions including 10a and 10b are welded to the wall body 2 of the pressure vessel 1, it is possible to reduce the stress value of the stress concentration portions 10a and 10b and take strength measures. can.

以上では、図８において手前側の側面部６に設けられた補強板１３、および図１１において示した補強板１３１について説明したが補強板１３、１３１の配置はこれに限るものではなく、側面部６と対向し、図８では内面２ｂが示された側面部にも補強板１３、１３１を取り付けても構わない。また、圧力容器１の周縁部に形成された他のＲ部（例えばＲ部１ｃ）もしくは他の角部（例えば角部１ｄ）に隣接した箇所に、さらに補強板１３、１３１を取り付けて構わない。 8 and the reinforcing plate 131 shown in FIG. 11 have been described, the arrangement of the reinforcing plates 13 and 131 is not limited to this. 6, and reinforcing plates 13 and 131 may also be attached to the side surface where the inner surface 2b is shown in FIG. In addition, reinforcing plates 13 and 131 may be further attached to other R portions (for example, R portion 1c) or other corner portions (for example, corner portion 1d) formed in the peripheral portion of the pressure vessel 1. .

実施の形態３．
実施の形態３に係る圧力容器１について説明する。図１２は圧力容器１の外観を示す斜視図、図１３は圧力容器１の補強板１４の例を示す平面図、図１４は圧力容器１の正面図、図１５は圧力容器１の側面図、図１６は圧力容器１の背面図である。実施の形態３に係る圧力容器１は、直方体の形状で、他の実施の形態とは異なる形状の補強板１４を設けた構成になっている。 Embodiment 3.
A pressure vessel 1 according to Embodiment 3 will be described. 12 is a perspective view showing the appearance of the pressure vessel 1, FIG. 13 is a plan view showing an example of the reinforcing plate 14 of the pressure vessel 1, FIG. 14 is a front view of the pressure vessel 1, FIG. 15 is a side view of the pressure vessel 1, 16 is a rear view of the pressure vessel 1. FIG. The pressure vessel 1 according to Embodiment 3 has a rectangular parallelepiped shape, and is provided with a reinforcing plate 14 having a shape different from that of the other embodiments.

圧力容器１は、図１２に示すように、前面部３、天井部４、背面部５、側面部６、床面部７から構成され、前面部３は開口している。圧力容器１を構成する各要素は壁体２であり、圧力容器１は、複数の金属板の壁体２が溶接により接合されて形成された容器である。 As shown in FIG. 12, the pressure vessel 1 is composed of a front portion 3, a ceiling portion 4, a rear portion 5, a side portion 6 and a floor portion 7, and the front portion 3 is open. Each element constituting the pressure vessel 1 is a wall body 2, and the pressure vessel 1 is a vessel formed by joining a plurality of metal plate wall bodies 2 by welding.

圧力容器１は、補強構造として、補強部材８および補強板１４を備える。補強部材８は、断面形状が例えば１６ｍｍ×１６ｍｍの正方形である四角柱状の部材であり、鉄もしくはステンレスからなる。補強部材８は、図１４に示すように、複数の壁体２のうちのひとつの壁体である背面部５の内面２ｂの中央に溶接されている。補強部材８は、圧力容器１の内部に設置される機器（図示せず）の接続に利用される補強構造である。図１５、図１６において、補強部材８の外形を破線で示す。 The pressure vessel 1 includes reinforcing members 8 and reinforcing plates 14 as reinforcing structures. The reinforcing member 8 is a quadrangular prism-shaped member having a square cross section of, for example, 16 mm×16 mm, and is made of iron or stainless steel. As shown in FIG. 14, the reinforcing member 8 is welded to the center of the inner surface 2b of the back portion 5, which is one of the plurality of walls 2. As shown in FIG. The reinforcing member 8 is a reinforcing structure used for connecting equipment (not shown) installed inside the pressure vessel 1 . 15 and 16, the outline of the reinforcing member 8 is indicated by broken lines.

補強板１４は、補強部材８が溶接された箇所に起因して生じた応力集中部１０ｃに対する強度対策として設けるものである。補強板１４は、図１３に示すように、外形が矩形状で、矩形状の開口部１４ａを中央に備えた鉄などの金属の板材である。補強板１４の厚みは、壁体２の板厚と同等、もしくは壁体２の板厚以下の厚さである。 The reinforcing plate 14 is provided as a strength countermeasure against the stress concentrated portion 10c caused by the welded portion of the reinforcing member 8. As shown in FIG. As shown in FIG. 13, the reinforcing plate 14 is a metal plate material such as iron having a rectangular outer shape and a rectangular opening 14a in the center. The thickness of the reinforcing plate 14 is equal to or less than the thickness of the wall 2 .

本実施の形態では、図１６に示すように、応力集中部１０ｃは、補強部材８が取り付けられたひとつの壁体である背面部５の、補強部材８に隣接した箇所の外面部分である。応力集中部１０ｃは補強部材８の付け根であり、補強部材８が溶接された箇所に起因して生じた応力集中部である。応力集中部１０ｃを含む位置に開口を有する補強板１４は、補強板１４の外周、および内周に沿って壁体からなる背面部５に溶接されている。矩形で板状の補強部材と圧力容器との溶接距離Ａと比較して、補強板１４と圧力容器１との溶接距離Ｂは、補強板１４に開口部１４ａを設けているため、溶接距離Ｂのほうが長くなる。溶接距離Ｂが溶接距離Ａに対して増加するということは、補強板１４と圧力容器１との接合距離が従来と比較して増加することになる。その結果、従来と比較して応力集中部の強度は向上する。また、開口していない矩形状の補強部材では、中央部分が圧力容器と全く接合されていなかったが、補強板１４は開口していない補強板の中央部分であった箇所も含めて圧力容器１と接合されているため、応力集中部の強度は向上する。 In the present embodiment, as shown in FIG. 16, the stress concentration portion 10c is the outer surface portion of the rear portion 5, which is one wall to which the reinforcing member 8 is attached, adjacent to the reinforcing member 8. As shown in FIG. The stress concentration portion 10c is the base of the reinforcing member 8, and is a stress concentration portion caused by the location where the reinforcing member 8 is welded. A reinforcing plate 14 having an opening at a position including the stress concentration portion 10c is welded to the back surface portion 5 made of a wall body along the outer circumference and the inner circumference of the reinforcing plate 14 . Compared to the welding distance A between the rectangular plate-shaped reinforcing member and the pressure vessel, the welding distance B between the reinforcing plate 14 and the pressure vessel 1 is the welding distance B because the reinforcing plate 14 is provided with the opening 14a. is longer. The fact that the welding distance B is increased with respect to the welding distance A means that the bonding distance between the reinforcing plate 14 and the pressure vessel 1 is increased compared to the conventional case. As a result, the strength of the stress concentrated portion is improved compared to the conventional art. In addition, in the rectangular reinforcing member with no opening, the central portion was not joined to the pressure vessel at all, but the reinforcing plate 14 was not joined to the pressure vessel 1 including the central portion of the reinforcing plate with no opening. , the strength of the stress concentration part is improved.

以上のように、補強部材８が取り付けられたひとつの壁体である背面部５の、補強部材８に隣接した箇所の外面部分が応力集中部１０ｃである場合、補強部材８の付け根が応力集中部１０ｃであり、この溶接された箇所に起因して生じた応力集中部１０ｃを含む位置に開口を有する補強板１４の外周および内周に沿って補強板１４が圧力容器１の壁体に溶接されているため、応力集中部１０ｃの応力値を低減して強度対策を施すことができる。また、補強板１４は外面に取り付けられるため、補強板１４の位置あわせが容易であり、取付作業を効率よく行うことができる。 As described above, when the stress concentration portion 10c is the outer surface portion adjacent to the reinforcing member 8 of the back surface portion 5, which is one wall to which the reinforcing member 8 is attached, the stress concentration is generated at the base of the reinforcing member 8. The reinforcing plate 14 is welded to the wall of the pressure vessel 1 along the outer circumference and the inner circumference of the reinforcing plate 14 having openings at positions including the stress concentrated portion 10c caused by this welded portion. Therefore, it is possible to reduce the stress value of the stress concentrated portion 10c and take strength measures. Further, since the reinforcing plate 14 is attached to the outer surface, the positioning of the reinforcing plate 14 is easy, and the mounting work can be performed efficiently.

なお、以上では、開口部１４ａの形状を矩形に設けたが、開口部１４ａの形状はこれに限るものではなく、応力集中部１０ｃを含む位置に開口を有する形状であれば、例えば五角形もしくは六角形のような多角形であっても構わない。 In the above description, the shape of the opening 14a is rectangular, but the shape of the opening 14a is not limited to this. It may be a polygon such as a square.

また本願は、様々な例示的な実施の形態及び実施例が記載されているが、１つ、または複数の実施の形態に記載された様々な特徴、態様、及び機能は特定の実施の形態の適用に限られるのではなく、単独で、または様々な組み合わせで実施の形態に適用可能である。
従って、例示されていない無数の変形例が、本願明細書に開示される技術の範囲内において想定される。例えば、少なくとも１つの構成要素を変形する場合、追加する場合または省略する場合、さらには、少なくとも１つの構成要素を抽出し、他の実施の形態の構成要素と組み合わせる場合が含まれるものとする。 Also, while this application has described various exemplary embodiments and examples, various features, aspects, and functions described in one or more of the embodiments may vary from particular embodiment to specific embodiment. The embodiments are applicable singly or in various combinations without being limited to the application.
Accordingly, numerous variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, modification, addition or omission of at least one component, extraction of at least one component, and combination with components of other embodiments shall be included.

１ 圧力容器、１ａ Ｒ部、１ｂ 角部、１ｃ Ｒ部、１ｄ 角部、２ 壁体、２ａ 外面、２ｂ 内面、３ 前面部、４ 天井部、５ 背面部、６ 側面部、７ 床面部、８ 補強部材、９ 補強板、９ａ 切欠き部、１０ 応力集中部、１１ 操作機器取付板、１２ 溶接部、１３ 補強板、１３ａ 切欠き部、１３１ 補強板、１４ 補強板、１４ａ 開口部、２１ ひとつの壁体、２２ 他の壁体、３０ 遮断器、３１ 遮断器操作機器、１００ ガス絶縁開閉装置 1 pressure vessel, 1a R part, 1b corner part, 1c R part, 1d corner part, 2 wall body, 2a outer surface, 2b inner surface, 3 front part, 4 ceiling part, 5 back part, 6 side part, 7 floor part, 8 reinforcing member 9 reinforcing plate 9a notch 10 stress concentration portion 11 operating device mounting plate 12 welding portion 13 reinforcing plate 13a notch 131 reinforcing plate 14 reinforcing plate 14a opening 21 1 wall, 22 other wall, 30 circuit breaker, 31 circuit breaker operating device, 100 gas insulated switchgear

Claims (4)

複数の金属板の壁体が溶接により接合されて形成された圧力容器であって、
前記壁体における溶接された箇所の周囲の一部を含む位置に切欠きを有し、平板状に形成された補強板を、前記壁体に備え、
前記切欠きを有した前記補強板は、前記補強板の外周に沿って１枚の前記壁体に溶接され、
前記切欠きは、前記補強板の外周から前記補強板の内側に引っ込む凹部であり、
前記凹部は、前記溶接された箇所に対向していることを特徴とする圧力容器。 A pressure vessel formed by joining a plurality of metal plate walls by welding,
The wall is provided with a reinforcing plate formed into a flat plate having a notch at a position including a part of the periphery of the welded portion of the wall ,
The reinforcing plate having the notch is welded to the one wall along the outer periphery of the reinforcing plate,
The notch is a recess recessed from the outer periphery of the reinforcing plate to the inside of the reinforcing plate,
The pressure vessel , wherein the recess faces the welded portion . 複数の前記壁体のうちのひとつの壁体の外面に溶接された補強部材を備え、
前記ひとつの壁体に接合された他の壁体の外面の、前記補強部材に隣接した箇所を含む位置に前記切欠きを有する、前記補強板が溶接されていることを特徴とする請求項１に記載の圧力容器。 A reinforcing member welded to the outer surface of one of the plurality of walls,
2. The reinforcing plate having the notch at a position including a portion adjacent to the reinforcing member is welded to the outer surface of another wall joined to the one wall. The pressure vessel described in . 前記圧力容器の周縁部に形成されたＲ部もしくは角部に隣接した箇所を含む位置に前記切欠きを有する、前記補強板が溶接されていることを特徴とする請求項１に記載の圧力容器。 2. The pressure vessel according to claim 1 , wherein the reinforcing plate having the notch is welded to a position including a portion adjacent to an R portion or a corner formed in the peripheral portion of the pressure vessel. . 請求項１から請求項３のいずれか１項に記載した圧力容器と、
前記圧力容器の内部に収容された遮断器と、を備えたことを特徴とするガス絶縁開閉装置。 a pressure vessel according to any one of claims 1 to 3 ;
and a circuit breaker housed inside the pressure vessel.
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