JP2019087428A - Insulating spacer - Google Patents

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JP2019087428A
JP2019087428A JP2017215155A JP2017215155A JP2019087428A JP 2019087428 A JP2019087428 A JP 2019087428A JP 2017215155 A JP2017215155 A JP 2017215155A JP 2017215155 A JP2017215155 A JP 2017215155A JP 2019087428 A JP2019087428 A JP 2019087428A
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insulating spacer
insulating
reinforcing member
spacer
gas
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JP6950471B2 (en
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兼一郎 松下
Kenichiro Matsushita
兼一郎 松下
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Meidensha Electric Manufacturing Co Ltd
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Abstract

To reduce the weight of a gas insulated switchgear insulating spacer to improve the strength of the insulating spacer.SOLUTION: An insulating spacer 1 included in a metal container 2 insulatively supports energized parts 3 in the metal container 2 and includes a hollow part 4 charged with an insulating gas and a reinforcing member 5. The reinforcing member 5 is provided between the energized part 3 and the energized part 3 in the insulating spacer 1. The reinforcing member 5 has a columnar shape, a pillar shape having a hyperbolic surface structure or a structure radially having a truss structure or a honeycomb structure from the middle point between the energized part 3 and the energized part 3. The insulating spacer 1 is prepared using a three-dimensional molding apparatus.SELECTED DRAWING: Figure 2

Description

本発明は、ガス絶縁開閉装置用の絶縁スペーサに関する。   The present invention relates to an insulating spacer for a gas-insulated switchgear.

ガス絶縁開閉装置は、高電圧大容量の電力系統等で広く使用されている。ガス絶縁開閉装置において、六フッ化硫黄（ＳＦ6）ガスや乾燥空気等の絶縁性ガスが絶縁媒体または消弧媒体として用いられる。また、ガス絶縁開閉装置において、金属容器の内部に高電圧導体を絶縁支持する絶縁スペーサが用いられる。 Gas-insulated switchgears are widely used in high-voltage, large-capacity power systems and the like. In the gas-insulated switchgear, an insulating gas such as sulfur hexafluoride (SF 6 ) gas or dry air is used as an insulating medium or an arc-extinguishing medium. Further, in the gas-insulated switchgear, an insulating spacer is used which supports the high voltage conductor in an insulating manner inside the metal container.

絶縁スペーサは、求められる耐熱性、強度、または誘電率傾斜等の特性に応じて、樹脂材料の開発や新規の構造の提案が多くなされている（例えば、特許文献１）。   With regard to the insulating spacer, many developments of resin materials and proposals for new structures have been made according to the required characteristics such as heat resistance, strength, or dielectric constant gradient (for example, Patent Document 1).

例えば、特許文献１に記載の絶縁スペーサでは、通電部から接地部に向けて一時的に空間を制御し、絶縁スペーサに誘電率の傾斜を設けている。このように、絶縁スペーサに誘電率の傾斜を設けることで、絶縁スペーサの表面の最大電界値が抑えられ、絶縁スペーサの絶縁性能が高められる。   For example, in the insulating spacer described in Patent Document 1, the space is temporarily controlled from the conducting portion toward the grounding portion, and the insulating spacer is provided with a gradient of the dielectric constant. As described above, by providing the insulating spacer with the gradient of the dielectric constant, the maximum electric field value on the surface of the insulating spacer is suppressed, and the insulating performance of the insulating spacer is enhanced.

特開２０１６−０３１８４５号公報JP, 2016-031845, A

絶縁スペーサは、区分スペーサとしての役割も担っているので、区分時に生じるガス（または、絶縁油）の差圧等による負荷に耐えることが求められる。絶縁スペーサの厚みを増やすことで、絶縁スペーサの強度を向上させることができるが、絶縁スペーサの厚みを増やすと、絶縁スペーサの重量が増加することとなる。   Since the insulating spacer also plays a role as a segment spacer, it is required to withstand the load due to the differential pressure of gas (or insulating oil) generated during segmenting. Although the strength of the insulating spacer can be improved by increasing the thickness of the insulating spacer, the weight of the insulating spacer will increase as the thickness of the insulating spacer is increased.

また、特許文献１に記載の発明では、三次元造形装置によってトラス構造を有する絶縁スペーサを製作しているが、絶縁スペーサにおける比誘電率を連続的に傾斜変化させるための構造（すなわち、電界緩和効果を向上させる構造）であり、絶縁スペーサの強度を向上させる構造ではない。   Moreover, in the invention described in Patent Document 1, the insulating spacer having a truss structure is manufactured by a three-dimensional modeling apparatus, but a structure for continuously changing the dielectric constant of the insulating spacer by inclination (that is, electric field relaxation This is a structure that improves the effect, and is not a structure that improves the strength of the insulating spacer.

本発明は、上記事情に鑑みて成されたものであり、ガス絶縁開閉装置用の絶縁スペーサを軽量化し、絶縁スペーサの強度を向上させることを目的としている。   The present invention has been made in view of the above circumstances, and an object thereof is to reduce the weight of an insulating spacer for a gas-insulated switchgear and to improve the strength of the insulating spacer.

上記目的を達成する本発明の絶縁スペーサの一態様は、
接地された金属容器に備えられ、該金属容器に複数の通電部を絶縁支持するガス絶縁開閉装置用の絶縁スペーサであって、
絶縁性ガスが満たされる中空部と、
前記絶縁スペーサ内部であって、前記通電部から選択される一対の通電部の間に、それぞれ柱状の補強部材を備えた、ことを特徴としている。 One aspect of the insulating spacer of the present invention for achieving the above object is
An insulating spacer for a gas-insulated switchgear, provided in a grounded metal container and insulatingly supporting a plurality of conducting parts in the metal container,
A hollow portion filled with an insulating gas,
A column-shaped reinforcing member is provided inside the insulating spacer and between a pair of conducting parts selected from the conducting parts.

また、上記目的を達成する本発明の絶縁スペーサの他の態様は、
接地された金属容器に備えられ、該金属容器に複数の通電部を絶縁支持するガス絶縁開閉装置用の絶縁スペーサであって、
絶縁性ガスが満たされる中空部と、
前記絶縁スペーサ内部であって、前記通電部から選択される一対の通電部の間に、それぞれ前記一対の通電部の中央部を中心に放射状に延びた骨格を有する補強部材を、備えた、ことを特徴としている。 Further, another aspect of the insulating spacer of the present invention for achieving the above object is
An insulating spacer for a gas-insulated switchgear, provided in a grounded metal container and insulatingly supporting a plurality of conducting parts in the metal container,
A hollow portion filled with an insulating gas,
A reinforcing member is provided inside the insulating spacer and between the pair of conducting parts selected from the conducting parts, the reinforcing member having a skeleton radially extending around the central part of the pair of conducting parts. It is characterized by

また、上記目的を達成する本発明の絶縁スペーサの他の態様は、上記絶縁スペーサにおいて、
前記補強部材は、トラス構造またはハニカム構造の骨格を有し、
該トラス構造またはハニカム構造は、前記一対の通電部の中央部から外周部にいくにしたがって粗となる、ことを特徴としている。 Another aspect of the insulating spacer of the present invention for achieving the above object is the insulating spacer according to the above,
The reinforcing member has a skeleton of a truss structure or a honeycomb structure,
The truss structure or the honeycomb structure is characterized in that it becomes rough as it goes from the central part to the outer peripheral part of the pair of current-carrying parts.

また、上記目的を達成する本発明の絶縁スペーサの他の態様は、上記絶縁スペーサにおいて、
前記絶縁スペーサは、三次元造形装置によって、絶縁材料から製造された、ことを特徴としている。 Another aspect of the insulating spacer of the present invention for achieving the above object is the insulating spacer according to the above,
The insulating spacer is characterized in that it is manufactured from an insulating material by a three-dimensional modeling apparatus.

また、上記目的を達成する本発明の絶縁スペーサの他の態様は、上記絶縁スペーサにおいて、
前記絶縁スペーサは、三相の母線を絶縁支持する絶縁スペーサであり、前記金属容器内を、前記中空部に満たされる絶縁性ガスと同種または異なる絶縁性ガスで満たされた空間と、絶縁油で満たされた空間とに区分する、ことを特徴としている。 Another aspect of the insulating spacer of the present invention for achieving the above object is the insulating spacer according to the above,
The insulating spacer is an insulating spacer for insulatingly supporting a three-phase bus bar, and the inside of the metal container is filled with a space filled with an insulating gas which is the same as or different from the insulating gas filled in the hollow portion, and an insulating oil. It is characterized by being divided into a filled space.

以上の発明によれば、ガス絶縁開閉装置用の絶縁スペーサを軽量化し、絶縁スペーサの強度を向上することができる。   According to the above invention, the weight of the insulating spacer for the gas-insulated switchgear can be reduced, and the strength of the insulating spacer can be improved.

本発明の第１実施形態に係る絶縁スペーサの取付状態を説明する説明図である。It is an explanatory view explaining the attachment state of the insulation spacer concerning a 1st embodiment of the present invention. （ａ）本発明の第１実施形態に係る絶縁スペーサの正面図、（ｂ）同絶縁スペーサの断面図である。(A) Front view of the insulation spacer which concerns on 1st Embodiment of this invention, (b) It is sectional drawing of the insulation spacer. （ａ）本発明の第２実施形態に係る絶縁スペーサの正面図、（ｂ）同絶縁スペーサの断面図である。(A) Front view of the insulation spacer which concerns on 2nd Embodiment of this invention, (b) It is sectional drawing of the insulation spacer. 本発明の第３実施形態に係る絶縁スペーサの断面図である。It is sectional drawing of the insulation spacer which concerns on 3rd Embodiment of this invention. （ａ）従来技術に係る絶縁スペーサの正面図、（ｂ）同絶縁スペーサの断面図である。(A) Front view of the insulation spacer which concerns on a prior art, (b) It is sectional drawing of the insulation spacer.

本発明の実施形態に係る絶縁スペーサについて、図面に基づいて詳細に説明する。   An insulating spacer according to an embodiment of the present invention will be described in detail based on the drawings.

図１に示すように、本発明の第１実施形態に係る絶縁スペーサ１は、ディスク状であり、外周部が接地された金属容器２の内壁面に固定される。絶縁スペーサ１には、例えば、高電圧導体である通電部３が挿通して設けられ、絶縁スペーサ１により金属容器２内に通電部３が絶縁支持される。なお、通電部３は、金属容器２を挿通した状態で金属容器２内に絶縁支持されるが、説明の便宜上、図１では絶縁スペーサ１部分以外の通電部３は図示省略している（図２−５も同様である）。金属容器２は、絶縁スペーサ１により、絶縁油が充填された区画２ａと、絶縁性ガス（例えば、ＳＦ6、乾燥空気、二酸化炭素、窒素、または、それらの混合ガス等、以下同じ）が充填された区画２ｂとに区分される。 As shown in FIG. 1, the insulating spacer 1 according to the first embodiment of the present invention is disk-shaped, and is fixed to the inner wall surface of the metal container 2 whose outer peripheral portion is grounded. For example, a conducting part 3 which is a high voltage conductor is inserted through the insulating spacer 1, and the conducting part 3 is insulated and supported in the metal container 2 by the insulating spacer 1. In addition, although the conduction part 3 is insulated and supported in the metal container 2 in the state which penetrated the metal container 2, for convenience of explanation, the conduction part 3 other than the insulation spacer 1 part is not shown in figure in FIG. The same applies to 2-5). The metal container 2 is filled with an insulating gas (for example, SF 6 , dry air, carbon dioxide, nitrogen, or a mixture thereof, etc., the same applies hereinafter) to the section 2 a filled with the insulating oil by the insulating spacer 1 And divided into two sections 2b.

図２に示すように、絶縁スペーサ１は、絶縁性ガスが充填される中空部４と補強部材５を備え、三相の通電部３が挿通して設けられる。三相の通電部３は、同一円周上に等間隔で配置される。図示省略しているが、通電部３の周囲は異種接合界面となるため、厚さを増すなどの構造がとられている。また、図２（ａ）では、説明の便宜上補強部材５を記載しているが、補強部材５は、絶縁スペーサ１の外側を覆う絶縁材料により外部から見えない位置に配置される（後に詳細に説明する図３（ａ）も同様である）。   As shown in FIG. 2, the insulating spacer 1 includes a hollow portion 4 filled with an insulating gas and a reinforcing member 5, and the three-phase conducting portion 3 is inserted and provided. The three-phase energizing units 3 are arranged at equal intervals on the same circumference. Although not shown, since the periphery of the current-carrying portion 3 is a dissimilar bonding interface, a structure such as an increase in thickness is adopted. Further, although the reinforcing member 5 is described for convenience of explanation in FIG. 2A, the reinforcing member 5 is disposed at a position where it can not be seen from the outside by the insulating material covering the outside of the insulating spacer 1 (details will be described later) The same applies to FIG. 3 (a) to be described.

絶縁スペーサ１を構成する絶縁材料は、例えば、エポキシ樹脂にフィラーとしてシリカ（酸化ケイ素）を充填した材料が用いられる。フィラーを充填する樹脂としては、エポキシ樹脂の他に、フェノール樹脂、ユリア樹脂、メラミン樹脂、ケイ素樹脂、ポリウレタン樹脂、ジシクロペンタジエン樹脂のいずれか、またはそれらの組み合わせたもの等が用いられる。また、フィラーとしては、シリカの他に、アルミナ（酸化アルミニウム）、酸化チタン、チタン酸バリウム、チタン酸ストロンチウム等が用いられる。絶縁スペーサ１を構成する絶縁材料の種類やその配合比、フィラーの種類やフィラーの密度等は適宜変更可能である。また、絶縁スペーサ１の外周を形成する絶縁材料と、補強部材５を構成する絶縁材料は、同じであっても、異なるものであってもよい。絶縁スペーサ１の外周を形成する絶縁材料と補強部材５を構成する絶縁材料が同種の場合、絶縁スペーサ１と補強部材５は一体に形成される。   As the insulating material constituting the insulating spacer 1, for example, a material in which an epoxy resin is filled with silica (silicon oxide) as a filler is used. As the resin for filling the filler, in addition to the epoxy resin, a phenol resin, a urea resin, a melamine resin, a silicone resin, a polyurethane resin, a dicyclopentadiene resin, or a combination thereof is used. In addition to silica, alumina (aluminum oxide), titanium oxide, barium titanate, strontium titanate or the like is used as the filler. The type of the insulating material constituting the insulating spacer 1 and the compounding ratio thereof, the type of the filler, the density of the filler, and the like can be appropriately changed. Further, the insulating material forming the outer periphery of the insulating spacer 1 and the insulating material forming the reinforcing member 5 may be the same or different. When the insulating material forming the outer periphery of the insulating spacer 1 and the insulating material forming the reinforcing member 5 are the same type, the insulating spacer 1 and the reinforcing member 5 are integrally formed.

中空部４は、絶縁スペーサ１の内部であって、応力集中の小さい箇所に形成される。つまり、絶縁スペーサ１は、中空部４に絶縁性ガスが満たされ、密閉された構造を備えている。中空部４に絶縁性ガスを満たすことで局所的な部分放電が抑制される。なお、絶縁スペーサ１の中心から外周部にかけて中空部４の分布に疎密を付けることで、絶縁スペーサ１の誘電率に傾斜（例えば、高電圧となる通電部３側の誘電率が絶縁スペーサ１の外周部と比較して高くなるような傾斜）を付けることもできる。   The hollow portion 4 is formed inside the insulating spacer 1 at a place where stress concentration is small. That is, the insulating spacer 1 has a hollow structure 4 filled with an insulating gas and sealed. By filling the hollow portion 4 with the insulating gas, local partial discharge is suppressed. Note that the dielectric constant of the insulating spacer 1 is inclined (for example, the dielectric constant on the side of the conducting portion 3 which becomes a high voltage is higher than that of the insulating spacer 1) by making the distribution of the hollow portions 4 dense from the center to the outer peripheral portion It is also possible to provide a slope that is higher than the outer circumference.

補強部材５は、通電部３と通電部３の間に設けられる。補強部材５は、対となる通電部３と通電部３の間にそれぞれ設けられる。補強部材５は、例えば、通電部３の挿通方向と平行な軸を有する柱状の構造を有するものが好ましい。例えば、補強部材５は、円柱状や双曲面構造（例えば、中央部がくびれた円柱状）を有する柱状の構造を有する。補強部材５を双曲面構造とすることで、絶縁スペーサ１の外周側の強度が向上し、中空部４の割合が増加することで絶縁スペーサ１をより軽量化できる。また、補強部材５は、対となる通電部３と通電部３の中間点から放射状にトラス構造またはハニカム構造をとるもの等でも良い。この場合、補強部材５は、例えば、複数の三角筒や六角筒等の角筒が、通電部の挿通方向と平行方向を軸として隙間なく並べられた構造となる。角筒の孔を小さくすれば強度が増すので、通電部３と通電部３の中間点から遠くに配置される角筒の孔（単位面積）を広くすることで、応力が集中する箇所の強度を向上し、絶縁スペーサ１の軽量化を図ることができる。また、通電部３の挿通方向に３次元のトラス構造を備えた構造とすることもできる。   The reinforcing member 5 is provided between the conducting unit 3 and the conducting unit 3. The reinforcing members 5 are respectively provided between the pair of conducting parts 3 and the conducting parts 3. The reinforcing member 5 preferably has, for example, a columnar structure having an axis parallel to the insertion direction of the conductive portion 3. For example, the reinforcing member 5 has a columnar structure having a cylindrical shape or a hyperboloid structure (e.g., a cylindrical shape having a narrowed central portion). By making the reinforcing member 5 into a hyperboloid structure, the strength on the outer peripheral side of the insulating spacer 1 is improved, and the ratio of the hollow portions 4 is increased, so that the weight of the insulating spacer 1 can be further reduced. Further, the reinforcing member 5 may have a truss structure or a honeycomb structure radially from an intermediate point between the current-carrying portion 3 and the current-carrying portion 3 which form a pair. In this case, the reinforcing member 5 has a structure in which, for example, a plurality of rectangular cylinders such as a triangular cylinder or a hexagonal cylinder are arranged without a gap with a direction parallel to the insertion direction of the current-carrying portion as an axis. The smaller the hole of the square tube, the higher the strength. Therefore, by enlarging the hole (unit area) of the square tube placed far from the middle point between the conducting part 3 and the conducting part 3, the strength of the place where the stress is concentrated The weight of the insulating spacer 1 can be reduced. Moreover, it can also be set as the structure provided with the three-dimensional truss structure in the penetration direction of the electricity supply part 3. FIG.

絶縁スペーサ１（補強部材５を含む）は、例えば、三次元造形装置を用いて作製される。絶縁スペーサ１を作製する際、三次元造形装置内の雰囲気を所定の絶縁性ガスとすることで、絶縁スペーサ１の中空部４に所定の絶縁性ガスが満たされる。三次元造形装置とは、３Ｄプリンタ等とも呼ばれる装置であり、３Ｄデータに基づいて、断面形状を積層していくことで立体物を造形する装置である。三次元造形装置の造形方法は、樹脂材料をノズルから射出して積み重ねて造形する熱溶解積層方式、液体樹脂を紫外線で固める光造形方式等いずれの方式であってもよい。   The insulating spacer 1 (including the reinforcing member 5) is manufactured, for example, using a three-dimensional shaping apparatus. When the insulating spacer 1 is manufactured, the hollow portion 4 of the insulating spacer 1 is filled with the predetermined insulating gas by setting the atmosphere in the three-dimensional modeling apparatus as the predetermined insulating gas. A three-dimensional modeling apparatus is an apparatus also called a 3D printer etc., and is an apparatus which models a three-dimensional object by laminating cross-sectional shape based on 3D data. The forming method of the three-dimensional forming apparatus may be any method such as a heat melting laminating method in which resin materials are injected from a nozzle and stacked to form, and an optical forming method in which liquid resin is hardened with ultraviolet light.

図３は、本発明の第２実施形態に係る絶縁スペーサ６である。第１実施形態に係る絶縁スペーサ１と同様に、絶縁スペーサ６は、金属容器２（図３では図示せず）に三相の通電部３を絶縁支持する。通電部３と通電部３の間には、それぞれ補強部材５が設けられる。   FIG. 3 shows an insulating spacer 6 according to a second embodiment of the present invention. Similar to the insulating spacer 1 according to the first embodiment, the insulating spacer 6 insulates and supports the three-phase conducting unit 3 in the metal container 2 (not shown in FIG. 3). Reinforcing members 5 are provided between the current-carrying portions 3 and 3 respectively.

第２実施形態に係る絶縁スペーサ６は、三相の通電部３が同一直線上に配置されていることが、第１実施形態に係る絶縁スペーサ１と異なるものである。その他の構成は、第１実施形態に係る絶縁スペーサ１と同様であるので、第１実施形態に係る絶縁スペーサ１と同様の構成については同じ符号を付し、詳細な説明を省略する。   The insulating spacer 6 according to the second embodiment is different from the insulating spacer 1 according to the first embodiment in that the three-phase conducting parts 3 are arranged on the same straight line. The other configuration is the same as that of the insulating spacer 1 according to the first embodiment, so the same reference numerals are given to the same components as those of the insulating spacer 1 according to the first embodiment, and the detailed description will be omitted.

図４は、本発明の第３実施形態に係る絶縁スペーサ７である。第１実施形態に係る絶縁スペーサ１と同様に、絶縁スペーサ７は、金属容器２（図４では図示せず）に三相の通電部３を絶縁支持する。絶縁スペーサ７の内部であって、通電部３と通電部３の間には、それぞれ補強部材８が設けられる。   FIG. 4 shows an insulating spacer 7 according to a third embodiment of the present invention. Similar to the insulating spacer 1 according to the first embodiment, the insulating spacer 7 insulates and supports the three-phase conducting unit 3 in the metal container 2 (not shown in FIG. 4). Reinforcing members 8 are provided inside the insulating spacer 7 and between the conducting portions 3 and 3 respectively.

第３実施形態に係る絶縁スペーサ７は、補強部材８の形状が、第１実施形態に係る絶縁スペーサ１と異なるものである。その他の構成は、第１実施形態に係る絶縁スペーサ１と同様であるので、第１実施形態に係る絶縁スペーサ１と同様の構成については同じ符号を付し、詳細な説明を省略する。なお、補強部材８を第２実施形態に係る絶縁スペーサ６に適用することもできる。   The insulating spacer 7 according to the third embodiment is different from the insulating spacer 1 according to the first embodiment in the shape of the reinforcing member 8. The other configuration is the same as that of the insulating spacer 1 according to the first embodiment, so the same reference numerals are given to the same components as those of the insulating spacer 1 according to the first embodiment, and the detailed description will be omitted. The reinforcing member 8 can also be applied to the insulating spacer 6 according to the second embodiment.

補強部材８は、通電部３の挿通方向と平行に設けられる芯部８ａと、芯部８ａから放射状に延びる補強部８ｂを備える。補強部材８は、例えば、補強部材５と同様の絶縁材料を用いて三次元造形装置により作製される。補強部材８と絶縁スペーサ７の外周を覆う壁面との接触部における補強部８ｂの断面は、トラス構造やハニカム構造とすることができる。また、補強部８ｂの断面を芯部８ａを中心とした同心円状とすることもできる。補強部材８と絶縁スペーサ７の外周を覆う壁面との接触部において、補強部８ｂにより形成される空間部の面積を芯部８ａから遠くにいくにしたがって広くすることで、絶縁スペーサ８の軽量化と、芯部８ａ近傍（すなわち、応力が集中する箇所）の強度を向上させることができる。   The reinforcing member 8 includes a core portion 8 a provided in parallel to the insertion direction of the current-carrying portion 3 and a reinforcing portion 8 b radially extending from the core portion 8 a. The reinforcing member 8 is manufactured by, for example, a three-dimensional modeling apparatus using an insulating material similar to the reinforcing member 5. The cross section of the reinforcing portion 8b at the contact portion between the reinforcing member 8 and the wall surface covering the outer periphery of the insulating spacer 7 can be a truss structure or a honeycomb structure. In addition, the cross section of the reinforcing portion 8b may be concentric with the core portion 8a as a center. In the contact portion between the reinforcing member 8 and the wall surface covering the outer periphery of the insulating spacer 7, the area of the space formed by the reinforcing portion 8 b is made wider as it goes farther from the core portion 8 a to reduce the weight of the insulating spacer 8 Also, the strength in the vicinity of the core portion 8a (that is, where the stress is concentrated) can be improved.

以上のような本発明の実施形態に係る絶縁スペーサ１、６、７によれば、通電部３と通電部３の間を補強する補強部材５（または、補強部材８）を備えることで、絶縁スペーサ１、６、７の強度を向上することができる。   According to the insulating spacers 1, 6 and 7 according to the embodiment of the present invention as described above, the insulating member 1 (or the reinforcing member 8) for reinforcing the space between the current-carrying portion 3 and the current-carrying portion 3 is provided. The strength of the spacers 1, 6, 7 can be improved.

また、絶縁スペーサ１、６、７に中空部４を形成することにより、絶縁スペーサ１、６、７を軽量化することができる。   In addition, by forming the hollow portions 4 in the insulating spacers 1, 6, 7, the weight of the insulating spacers 1, 6, 7 can be reduced.

図５に示すように、従来の絶縁スペーサ９は、樹脂注型等により作製され、内部に空間はないものであった。これに対して、本発明の実施形態に係る絶縁スペーサ１、６、７は、最も応力の集中する箇所を構造上強化し、さらに応力集中の小さい箇所では内部を中空構造とすることで、絶縁スペーサ１、６、７の高強度化と軽量化を達成している。つまり、機械強度的な弱点を内部構造により強化し、内部を中空構造とすることで絶縁スペーサ１、６、７の軽量化が実現される。特に、絶縁スペーサ１、６、７の内部において、通電部３と通電部３の中間点から放射状に延びた柱状、トラス構造またはハニカム構造を有する補強部材５、８を備えることにより、絶縁スペーサ１、６、７の強度向上と重量低減を実現する。   As shown in FIG. 5, the conventional insulating spacer 9 was manufactured by resin casting etc., and there was no space inside. On the other hand, in the insulating spacers 1, 6, 7 according to the embodiment of the present invention, the location where the stress is concentrated is structurally reinforced, and the inside is a hollow structure where the stress concentration is small. High strength and light weight of the spacers 1, 6, 7 are achieved. That is, by weakening the mechanical strength weakness by the internal structure and making the inside hollow, weight reduction of the insulating spacers 1, 6, 7 is realized. In particular, by providing the reinforcing members 5 and 8 having a columnar, truss structure or honeycomb structure radially extending from the middle point of the conducting part 3 and the conducting part 3 inside the insulating spacers 1, 6 and 7, the insulating spacer 1 is provided. , 6 and 7 strength improvement and weight reduction are realized.

つまり、本発明の実施形態に係る絶縁スペーサ１、６、７は、絶縁スペーサ１、６、７の破壊の起点となる箇所を特定し、破壊の起点となる箇所を中心に応力を分散する構造を備える。例えば、三相の通電部３を絶縁支持する絶縁スペーサ１、６、７であれば、破壊の起点となる箇所は通電部３周辺と考えられる。しかし、絶縁スペーサ１、６、７の通電部３の周囲は異種接合界面となるため、厚さを増すなどの構造がとられている。したがって、何らかの外力により破壊に至るとして、通電部３とモールド材（絶縁スペーサ１、６、７の絶縁部）の界面が破壊の起点となることはなく、破壊の起点となり得るのは通電部３と通電部３の中間点と考えられる。そこで、本発明の実施形態に係る絶縁スペーサ１、６、７は、該当箇所（通電部３と通電部３の各中間点（通電部３を除く））を中心に応力を分散する補強構造を備えることで、絶縁スペーサ１、６、７の強度を向上させることができる。例えば、補強部材５のように、絶縁スペーサ１、６の外周を覆う壁面と補強部材５の接触部の断面形状が、通電部３と通電部３の中央部を中心に放射状に延びた骨格を備える構造とすることで絶縁スペーサ１、６の強度を向上させることができる。また、補強部材８のように、絶縁スペーサ７の外周を覆う壁面と補強部材８の接触部の断面形状だけでなく、通電部３と通電部３の中央部を中心に三次元的に放射状に延びた骨格を備える構造とすることで、絶縁スペーサ７の強度を向上させることができる。   That is, the insulating spacers 1, 6, 7 according to the embodiment of the present invention identify the locations that become the starting points of breakage of the insulating spacers 1, 6, 7 and disperse stress around the locations that become the starting points of breakage. Equipped with For example, in the case of the insulating spacers 1, 6, and 7 insulatingly supporting the three-phase conducting portion 3, it is considered that the portion serving as the starting point of breakage is around the conducting portion 3. However, since the periphery of the current-carrying portion 3 of the insulating spacers 1, 6, 7 is a dissimilar bonding interface, a structure such as an increase in thickness is adopted. Therefore, the interface between the current-carrying portion 3 and the mold material (insulation portions of the insulating spacers 1, 6, 7) does not become a starting point of breakage as it leads to breakage due to some external force, and it can become a starting point of breakage. And the middle point of the current-carrying portion 3. Therefore, the insulating spacers 1, 6, 7 according to the embodiment of the present invention have a reinforcing structure in which stress is dispersed around the corresponding portions (the conductive points 3 and the intermediate points of the conductive portions 3 (excluding the conductive portions 3)). By providing, the strength of the insulating spacers 1, 6, 7 can be improved. For example, like the reinforcing member 5, the cross-sectional shape of the wall surface covering the outer periphery of the insulating spacers 1 and 6 and the contact portion of the reinforcing member 5 has a skeleton radially extending around the central portion of the conductive portion 3 and the conductive portion 3. By providing the structure, the strength of the insulating spacers 1 and 6 can be improved. Further, like the reinforcing member 8, not only the cross-sectional shape of the wall surface covering the outer periphery of the insulating spacer 7 and the contact portion of the reinforcing member 8 but also three-dimensionally radially around the conductive portions 3 and the central portions of the conductive portions 3 The strength of the insulating spacer 7 can be improved by providing the structure having the extended frame.

また、三次元造形装置を用いて絶縁スペーサ１、６、７を作製することで、複雑な内部構造を有する絶縁スペーサ１、６、７を容易且つ効率よく作製することができる。従来、中空充填剤を添加して、意図的に絶縁スペーサ内部に空隙を作製し、絶縁スペーサの軽量化や低誘電率化とする手法も提案されているが、空隙の制御ができず欠陥として破壊の起点となるおそれがある。そこで、三次元造形装置を用いて絶縁スペーサ１、６、７を作製することで、空隙や補強部材の構造を細かく制御し、絶縁スペーサ１、６、７の高強度化と軽量化が達成される。   Moreover, the insulating spacers 1, 6, 7 having a complicated internal structure can be easily and efficiently produced by producing the insulating spacers 1, 6, 7 using a three-dimensional modeling apparatus. Conventionally, hollow fillers have been added to intentionally create air gaps inside the insulating spacer, and methods have been proposed to reduce the weight and dielectric constant of the insulating spacer, but the air gaps can not be controlled and defects can not be obtained. It may be the starting point of destruction. Therefore, by manufacturing the insulating spacers 1, 6, 7 using the three-dimensional modeling apparatus, the structure of the air gap and the reinforcing member can be finely controlled, and high strength and weight reduction of the insulating spacers 1, 6, 7 can be achieved. Ru.

本発明の実施形態に係る絶縁スペーサ１、６、７は、三相の母線を絶縁支持する絶縁スペーサ等、高温且つ高負荷に耐えることが要求される区分スペーサに好適に用いることができる。   The insulating spacers 1, 6, 7 according to the embodiment of the present invention can be suitably used for segment spacers that are required to withstand high temperatures and high loads, such as insulating spacers that insulate and support three-phase bus bars.

以上、具体的な実施形態を示して本発明の絶縁スペーサについて説明したが、本発明の絶縁スペーサは、実施形態に限定されるものではなく、その特徴を損なわない範囲で適宜設計変更が可能であり、設計変更されたものも、本発明の技術的範囲に属する。   As mentioned above, although the insulation spacer of the present invention was explained showing the concrete embodiment, the insulation spacer of the present invention is not limited to the embodiment, and design change is possible suitably in the range which does not impair the feature. Also, those modified in design are within the technical scope of the present invention.

例えば、絶縁スペーサを絶縁性ガスが充填された区画間を隔てる金属壁に備え、絶縁スペーサで、金属壁を挿通して設けられる通電部を絶縁支持することもできる。   For example, the insulating spacer may be provided on the metal wall separating the sections filled with the insulating gas, and the conductive spacer provided so as to pass through the metal wall may be insulated and supported by the insulating spacer.

また、実施形態の説明では、三次元造形装置で絶縁スペーサを製作する例を示したが、従来の方法により絶縁スペーサを製作してもよい。ただし、遠心法や多段充填法のような製作方法は、３つの同軸放射形状等複雑な傾斜制御には向かない。また、モールド成形では、成形体輪郭の設計は可能であるが、内部の構造を複雑に制御することは非常に困難である。   Moreover, although the example which manufactures an insulation spacer with a three-dimensional modeling apparatus was shown in description of embodiment, you may manufacture an insulation spacer by the conventional method. However, manufacturing methods such as centrifugal method and multistage filling method are not suitable for complicated tilt control such as three coaxial radiation shapes. Further, in molding, although it is possible to design a molded body contour, it is very difficult to control the internal structure in a complicated manner.

また、絶縁スペーサに満たされる絶縁性ガスは、ガス絶縁開閉装置に満たされた絶縁性ガスと同種の絶縁性ガスでも異なる種類の絶縁性ガスでもよい。   The insulating gas filled in the insulating spacer may be the same insulating gas as the insulating gas filled in the gas-insulated switchgear or an insulating gas of a different type.

また、絶縁スペーサに形成される中空部は、トラス構造またはハニカム構造により形成される空間部分だけであってもよい。   Further, the hollow portion formed in the insulating spacer may be only a space portion formed by a truss structure or a honeycomb structure.

１、６、７…絶縁スペーサ
２…金属容器
３…通電部
４…中空部
５、８…補強部材
８ａ…芯部、８ｂ…補強部 1, 6, 7 ... Insulating spacer 2 ... Metal container 3 ... Conducting part 4 ... Hollow part 5, 8 ... Reinforcing member 8a ... Core part, 8b ... Reinforcing part

Claims (5)

接地された金属容器に備えられ、該金属容器に複数の通電部を絶縁支持するガス絶縁開閉装置用の絶縁スペーサであって、
絶縁性ガスが満たされる中空部と、
前記絶縁スペーサ内部であって、前記通電部から選択される一対の通電部の間に、それぞれ柱状の補強部材を備えた、ことを特徴とする絶縁スペーサ。 An insulating spacer for a gas-insulated switchgear, provided in a grounded metal container and insulatingly supporting a plurality of conducting parts in the metal container,
A hollow portion filled with an insulating gas,
An insulating spacer characterized by comprising a columnar reinforcing member inside the insulating spacer and between a pair of conductive parts selected from the conductive parts. 接地された金属容器に備えられ、該金属容器に複数の通電部を絶縁支持するガス絶縁開閉装置用の絶縁スペーサであって、
絶縁性ガスが満たされる中空部と、
前記絶縁スペーサ内部であって、前記通電部から選択される一対の通電部の間に、それぞれ前記一対の通電部の中央部を中心に放射状に延びた骨格を有する補強部材を、備えた、ことを特徴とする絶縁スペーサ。 An insulating spacer for a gas-insulated switchgear, provided in a grounded metal container and insulatingly supporting a plurality of conducting parts in the metal container,
A hollow portion filled with an insulating gas,
A reinforcing member is provided inside the insulating spacer and between the pair of conducting parts selected from the conducting parts, the reinforcing member having a skeleton radially extending around the central part of the pair of conducting parts. Insulating spacer characterized by 前記補強部材は、トラス構造またはハニカム構造の骨格を有し、
該トラス構造またはハニカム構造は、前記一対の通電部の中央部から外周部にいくにしたがって粗となる、ことを特徴とする請求項２に記載の絶縁スペーサ。 The reinforcing member has a skeleton of a truss structure or a honeycomb structure,
The insulating spacer according to claim 2, wherein the truss structure or the honeycomb structure becomes rougher as it goes from the central part to the outer peripheral part of the pair of conducting parts. 前記絶縁スペーサは、三次元造形装置によって、絶縁材料から製造された、ことを特徴とする請求項１から請求項３のいずれか１項に記載の絶縁スペーサ。   The insulating spacer according to any one of claims 1 to 3, wherein the insulating spacer is manufactured from an insulating material by a three-dimensional modeling apparatus. 前記絶縁スペーサは、三相の母線を絶縁支持する絶縁スペーサであり、前記金属容器内を、前記中空部に満たされる絶縁性ガスと同種または異なる絶縁性ガスで満たされた空間と、絶縁油で満たされた空間とに区分する、ことを特徴とする請求項１から請求項４のいずれか１項に記載の絶縁スペーサ。   The insulating spacer is an insulating spacer for insulatingly supporting a three-phase bus bar, and the inside of the metal container is filled with a space filled with an insulating gas which is the same as or different from the insulating gas filled in the hollow portion, and an insulating oil. The insulating spacer according to any one of claims 1 to 4, wherein the insulating spacer is divided into a filled space.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022054154A1 (en) * 2020-09-09 2022-03-17 東芝エネルギーシステムズ株式会社 Gas-insulated device
KR20220105897A (en) * 2021-01-21 2022-07-28 (주)이플전기 Miniature Insulated Spacer for Gas Insulated Switchgear with Additive Manufacturing Processes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022054154A1 (en) * 2020-09-09 2022-03-17 東芝エネルギーシステムズ株式会社 Gas-insulated device
JP7400113B2 (en) 2020-09-09 2023-12-18 東芝エネルギーシステムズ株式会社 gas insulated equipment
KR20220105897A (en) * 2021-01-21 2022-07-28 (주)이플전기 Miniature Insulated Spacer for Gas Insulated Switchgear with Additive Manufacturing Processes
KR102471505B1 (en) * 2021-01-21 2022-11-28 (주)이플전기 Miniature Insulated Spacer for Gas Insulated Switchgear with Additive Manufacturing Processes

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