JP2022114495A - gas insulated switchgear - Google Patents

gas insulated switchgear Download PDF

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JP2022114495A
JP2022114495A JP2021010761A JP2021010761A JP2022114495A JP 2022114495 A JP2022114495 A JP 2022114495A JP 2021010761 A JP2021010761 A JP 2021010761A JP 2021010761 A JP2021010761 A JP 2021010761A JP 2022114495 A JP2022114495 A JP 2022114495A
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drive shaft
insulated switchgear
drive
flange
main circuit
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直明 井上
Naoaki Inoue
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

To provide a highly reliable hermetic drive portion in a gas insulated switchgear equipped with a switch that operates the opening and closing of a main circuit portion by rotational drive.SOLUTION: A gas insulated switchgear includes a switch: including a main circuit unit housed in an airtight container and having a first drive shaft; and an operation mechanism portion arranged outside the sealed container, having a second drive shaft, and operating opening and closing of the main circuit portion by rotational drive. The first drive shaft and the second drive shaft are made of a non-magnetic material, the first drive shaft and the second drive shaft are arranged coaxially and face each other through a non-magnetic material portion of the sealed container, and permanent magnets are provided on the surface sides of the first drive shaft and the second drive shaft facing each other.SELECTED DRAWING: Figure 2

Description

本願は、ガス絶縁開閉装置に関するものである。 The present application relates to a gas insulated switchgear.

ガス絶縁開閉装置は、高電圧が印加される主回路部を密閉容器内に収納し、絶縁性能に優れたＳＦ６ガスを封入することで、装置をコンパクト化している。また近年はＳＦ６ガスに代わり、例えばドライエア等の環境面にも優れたガスを代替ガスとして封入している場合もある。
このようなガス絶縁開閉装置は、密閉容器内に配置した遮断器、断路器および接地開閉器等の開閉器の主回路部を密閉容器の外側に配置したに操作機構部よって操作する必要がある。そのため、密閉容器の気密を維持した状態で操作機構部の駆動力を密閉容器内の主回路部に伝達する気密駆動軸を用いている。 A gas-insulated switchgear is made compact by enclosing the main circuit section to which a high voltage is applied in an airtight container filled with SF6 gas, which has excellent insulation performance. In recent years, in place of the SF6 gas, there are cases where a gas such as dry air, which is excellent in terms of environment, is enclosed as an alternative gas.
In such a gas-insulated switchgear, it is necessary to operate the main circuits of the switches, such as circuit breakers, disconnecting switches, and grounding switches, which are placed inside the sealed container, by means of an operating mechanism placed outside the sealed container. . Therefore, an airtight drive shaft is used to transmit the driving force of the operating mechanism to the main circuit in the closed container while maintaining the airtightness of the closed container.

出願人も、例えば特許文献１において、駆動軸の気密摺動部にＯリングなどのゴム製のガスシール部材を用いることで、気密状態を維持したまま駆動力を伝達させる構造を開示している。また、例えば特許文献２において、遮断器の直線駆動部に金属製のベローズを用いた構造を開示している。 The applicant also discloses, for example, in Patent Document 1, a structure that transmits driving force while maintaining an airtight state by using a rubber gas seal member such as an O-ring in an airtight sliding portion of the drive shaft. . Further, for example, Patent Document 2 discloses a structure in which a metal bellows is used for a linear drive portion of a circuit breaker.

特許第６６２５２６８号公報Japanese Patent No. 6625268 特許第４５５５０８６号公報Japanese Patent No. 4555086

特許文献１においては簡便な構造で駆動力を伝達する気密駆動部を実現でき、特許文献２においては、金属製のベローズを用いることで経年劣化の影響を受けない等の特徴を有する。しかし、昨今では、回転力により駆動を伝達させる構造において信頼性の高い気密駆動部が求められている。 In Patent Document 1, it is possible to realize an airtight drive portion that transmits a driving force with a simple structure, and in Patent Document 2, the use of metal bellows has the advantage of not being affected by aged deterioration. However, in recent years, there is a demand for a highly reliable airtight drive unit in a structure that transmits drive by rotational force.

本願は、上記のような課題を解決するための技術を開示するものであり、ガス絶縁開閉装置に搭載され密閉容器内に収納された開閉器に対し、密閉容器外から回転駆動力を伝達して開閉器を駆動する操作機構部を備え、操作機構部から回転駆動力を密閉容器内に伝達する気密駆動部に永久磁石を用いることで、信頼性の高い気密駆動部を有するガス絶縁開閉装置を提供することを目的とする。 The present application discloses a technique for solving the above-described problems, in which a rotational driving force is transmitted from outside the sealed container to a switch installed in a gas-insulated switchgear and housed in the sealed container. A gas insulated switchgear having a highly reliable airtight drive unit by using a permanent magnet for the airtight drive unit that transmits rotational driving force from the operation mechanism unit to the inside of the sealed container. intended to provide

本願に開示されるガス絶縁開閉装置は、密閉容器に収納され第一の駆動軸を有する主回路部と、前記密閉容器の外に配置されるとともに第二の駆動軸を有し前記主回路部の開閉を回転駆動により操作する操作機構部と、を備えた開閉器を搭載したガス絶縁開閉装置であって、前記第一の駆動軸及び前記第二の駆動軸は非磁性材料からなり、前記第一の駆動軸と前記第二の駆動軸とは前記密閉容器の非磁性体部を介して対向するとともに同軸に配置され、前記第一の駆動軸及び前記第二の駆動軸の互いに対向する面側にそれぞれ永久磁石が設けられたものである。 A gas-insulated switchgear disclosed in the present application comprises a main circuit portion housed in a sealed container and having a first drive shaft, and a main circuit portion disposed outside the sealed container and having a second drive shaft. and an operation mechanism for operating the opening and closing of the gas-insulated switchgear by rotating the switch, wherein the first drive shaft and the second drive shaft are made of a non-magnetic material, and the The first drive shaft and the second drive shaft are arranged coaxially while facing each other through the non-magnetic material portion of the closed container, and the first drive shaft and the second drive shaft face each other. A permanent magnet is provided on each surface side.

本願に開示されるガス絶縁開閉装置によれば、開閉器を収納している密閉容器の気密を維持した状態で回転駆動力を伝達することが可能となり、信頼性の高い気密駆動部を有するガス絶縁開閉装置を提供することが可能となる。 According to the gas insulated switchgear disclosed in the present application, it is possible to transmit the rotational driving force while maintaining the airtightness of the sealed container housing the switch, and the gas insulated switchgear having a highly reliable airtight drive unit is provided. It becomes possible to provide an insulated switchgear.

実施の形態１に係るガス絶縁開閉装置の概略構成を示す側断面図である。1 is a side sectional view showing a schematic configuration of a gas-insulated switchgear according to Embodiment 1; FIG. 実施の形態１に係る気密駆動部の概略構成を示す断面図である。2 is a cross-sectional view showing a schematic configuration of an airtight drive unit according to Embodiment 1; FIG. 実施の形態１に係る気密駆動部の永久磁石の配置例を示す図である。FIG. 4 is a diagram showing an arrangement example of permanent magnets of the airtight drive unit according to Embodiment 1; 実施の形態１に係る気密駆動部の永久磁石の別の配置例を示す図である。FIG. 8 is a diagram showing another arrangement example of the permanent magnets of the airtight drive unit according to Embodiment 1; 実施の形態１に係る気密駆動部の永久磁石のさらに別の配置例を示す図である。FIG. 9 is a diagram showing still another arrangement example of the permanent magnets of the hermetic drive unit according to Embodiment 1; 実施の形態２に係る気密駆動部の概略構成を示す断面図である。FIG. 10 is a cross-sectional view showing a schematic configuration of an airtight drive unit according to Embodiment 2;

以下、本願で開示されるガス絶縁開閉装置の実施の形態について図を参照して説明する。なお、各図中、同一符号は、同一または相当部分を示すものとする。なお、ガス絶縁開閉装置は、１つまたは複数の開閉器を搭載している。 Hereinafter, embodiments of a gas-insulated switchgear disclosed in the present application will be described with reference to the drawings. In addition, in each figure, the same code|symbol shall show the same or a corresponding part. A gas-insulated switchgear is equipped with one or more switches.

実施の形態１．
以下に、実施の形態１に係るガス絶縁開閉装置について図を用いて説明する。
図１は、実施の形態１に係るガス絶縁開閉装置１の概略構成を示す側断面図である。図において、ガス絶縁開閉装置１は筺体の内部に、一端が電力ケーブル５に接続された遮断器の主回路部３ａ、遮断器の主回路部３ａを操作する遮断器の操作機構部３ｂ、遮断器の主回路部３ａに接続された断路器及び接地開閉器の主回路部２ａ、断路器及び接地開閉器の主回路部２ａを操作する断路器及び接地開閉器の操作機構部２ｂを備えている。遮断器の主回路部３ａは筐体内で密閉容器６に収納され、遮断器の操作機構部３ｂは密閉容器６の外部に配置され、断路器及び接地開閉器の主回路部２ａは密閉容器７に収納され、断路器及び接地開閉器の操作機構部２ｂは密閉容器７の外部に配置されている。
ガス絶縁開閉装置によっては、断路器と接地開閉器を個別に備えるもの、接地開閉器付き断路器を備えるもの等があり、ここではそれらを総称して断路器等と呼ぶ。したがって以下では、断路器及び接地開閉器の主回路部２ａは断路器等の主回路部２ａ、断路器及び接地開閉器の操作機構部２ｂは断路器等の操作機構部２ｂと称する。 Embodiment 1.
A gas-insulated switchgear according to Embodiment 1 will be described below with reference to the drawings.
FIG. 1 is a side sectional view showing a schematic configuration of a gas-insulated switchgear 1 according to Embodiment 1. FIG. In the figure, the gas insulated switchgear 1 includes a housing, a circuit breaker main circuit portion 3a, one end of which is connected to a power cable 5, a circuit breaker operation mechanism portion 3b for operating the circuit breaker main circuit portion 3a, a circuit breaker a main circuit unit 2a for the disconnecting switch and the grounding switch connected to the main circuit unit 3a of the device, and an operating mechanism unit 2b for the disconnecting switch and the grounding switch for operating the main circuit unit 2a for the disconnecting switch and the grounding switch. there is The main circuit portion 3a of the circuit breaker is housed in a closed container 6 within the housing, the operation mechanism portion 3b of the circuit breaker is arranged outside the closed container 6, and the main circuit portion 2a of the disconnecting switch and the earthing switch is contained in a closed container 7. The operation mechanism 2b of the disconnecting switch and the grounding switch is arranged outside the sealed container 7. As shown in FIG.
Some gas-insulated switchgears include a disconnecting switch and a grounding switch separately, and a disconnecting switch with a grounding switch. Therefore, hereinafter, the main circuit portion 2a of the disconnecting switch and the grounding switch is referred to as the main circuit portion 2a such as the disconnecting switch, and the operating mechanism portion 2b of the disconnecting switch and the grounding switch is referred to as the operating mechanism portion 2b such as the disconnecting switch.

遮断器の主回路部３ａは、直線駆動部の駆動動作により遮断器の開閉動作が行われる。そのため、遮断器の操作機構部３ｂの駆動力を密閉容器６の気密を維持したまま遮断器の主回路部３ａに伝達する構造として、金属製の気密用のベローズ４を用いて遮断器の直線駆動部の駆動動作を可能としている。 The main circuit portion 3a of the circuit breaker is opened and closed by the driving operation of the linear driving portion. Therefore, as a structure for transmitting the driving force of the operation mechanism portion 3b of the circuit breaker to the main circuit portion 3a of the circuit breaker while maintaining the airtightness of the closed container 6, a metallic airtight bellows 4 is used to straighten the circuit breaker. It enables the drive operation of the drive unit.

一方、断路器等の主回路部２ａは、回転駆動部の駆動動作により開閉動作が行われる。そのため、断路器等の操作機構部２ｂの回転駆動力を密閉容器７の気密を維持したまま断路器等の主回路部２ａに伝達する構造が必要となる。しかし、回転駆動部の気密を維持するために上述のようなベローズを用いることは適切ではない。密閉容器７の気密を維持した状態で断路器等の操作機構部２ｂから断路器等の主回路部２ａへ回転駆動力を伝達する構造である気密駆動部については、以下に詳細に説明する。 On the other hand, the main circuit portion 2a such as a disconnector is opened and closed by the driving operation of the rotary drive portion. Therefore, a structure for transmitting the rotational driving force of the operating mechanism portion 2b such as the disconnector to the main circuit portion 2a such as the disconnector while maintaining the airtightness of the sealed container 7 is required. However, it is not appropriate to use bellows as described above to keep the rotary drive airtight. The airtight driving section, which is a structure for transmitting rotational driving force from the operating mechanism section 2b such as a disconnector to the main circuit section 2a such as a disconnector while maintaining the airtightness of the closed container 7, will be described in detail below.

図２は、実施の形態１に係るガス絶縁開閉装置における断路器等の操作機構部２ｂと断路器等の主回路部２ａとの間で回転駆動力を伝達する気密駆動部の概略構成を示す断面図である。
図において、密閉容器７外の断路器等の操作機構部２ｂは回転駆動部である駆動軸９ｂを有し、一方密閉容器７内の断路器等の主回路部２ａは回転駆動部である駆動軸９ａを有している。また、フランジ８には密閉容器７内に軸受部１０ａ、密閉容器７外に軸受部１０ｂを取り付けており、それぞれ駆動軸９ａ、駆動軸９ｂを支持する構造となっている。また、駆動軸９ａ及び駆動軸９ｂは同軸となるように配置されている。駆動軸９ａ、駆動軸９ｂにはアルミまたはステンレスなどの非磁性材料を使用するのが望ましい。両者は密閉容器７のフランジ８によって密閉容器７の内外に仕切られているため、密閉容器７完全に気密密閉された構造が維持される。また、断路器等の主回路部２ａの駆動軸９ａ及び断路器等の操作機構部２ｂの駆動軸９ｂの両者が対向する面側、すなわち先端部には永久磁石１１が設けられている。また、密閉容器７のフランジ８にはアルミまたはステンレスなどの非磁性材料が使用されているため、断路器等の主回路部２ａの駆動軸９ａ及び断路器等の操作機構部２ｂの駆動軸９ｂの先端の永久磁石１１同士が密閉容器７の非磁性材料からなるフランジ８を挟んで磁力により吸引する構造となっている。 FIG. 2 shows a schematic configuration of an airtight drive section that transmits rotational driving force between an operation mechanism section 2b such as a disconnector and a main circuit section 2a such as a disconnector in the gas-insulated switchgear according to the first embodiment. It is a sectional view.
In the figure, an operation mechanism portion 2b such as a disconnector outside the sealed container 7 has a drive shaft 9b which is a rotary drive portion, while a main circuit portion 2a such as a disconnector inside the sealed container 7 is a drive shaft which is a rotary drive portion. It has an axis 9a. A bearing portion 10a is attached to the flange 8 inside the closed container 7, and a bearing portion 10b is attached outside the closed container 7 to support the drive shaft 9a and the drive shaft 9b, respectively. Further, the drive shaft 9a and the drive shaft 9b are arranged coaxially. It is desirable to use a non-magnetic material such as aluminum or stainless steel for the drive shafts 9a and 9b. Since both are partitioned into the inside and outside of the closed container 7 by the flange 8 of the closed container 7, the closed container 7 is kept completely airtightly sealed. In addition, a permanent magnet 11 is provided on the side facing both the drive shaft 9a of the main circuit portion 2a such as the disconnector and the drive shaft 9b of the operation mechanism portion 2b such as the disconnector, ie, the tip portion. In addition, since a non-magnetic material such as aluminum or stainless steel is used for the flange 8 of the sealed container 7, the drive shaft 9a of the main circuit section 2a such as the disconnector and the drive shaft 9b of the operation mechanism section 2b such as the disconnector Permanent magnets 11 at the ends of the closed container 7 sandwich the flange 8 made of a non-magnetic material of the sealed container 7 and attract each other by magnetic force.

この構成により、フランジ８を介して駆動軸９ａ、９ｂの先端の永久磁石１１同士の吸引力により密閉容器７内外の駆動軸９ａ、９ｂは磁気結合されているので、密閉容器７外の断路器等の操作機構部２ｂの駆動軸９ｂを図２中の点線の矢印のように回転駆動することで、断路器等の主回路部２ａの駆動軸９ａも回転駆動する。したがって密閉容器７の気密を維持した状態で密閉容器７外の断路器等の操作機構部２ｂの回転駆動力を密閉容器７内の断路器等の主回路部２ａに伝達することが可能となる。 With this configuration, the drive shafts 9a and 9b inside and outside the sealed container 7 are magnetically coupled by the attractive force between the permanent magnets 11 at the tips of the drive shafts 9a and 9b via the flange 8. By rotationally driving the driving shaft 9b of the operating mechanism portion 2b as indicated by the dotted arrow in FIG. 2, the driving shaft 9a of the main circuit portion 2a such as the disconnector is also rotationally driven. Therefore, it is possible to transmit the rotational driving force of the operation mechanism portion 2b such as the disconnector outside the sealed container 7 to the main circuit portion 2a such as the disconnector inside the sealed container 7 while the airtightness of the sealed container 7 is maintained. .

なお、駆動軸９ａ、９ｂとフランジ８との間は駆動軸９ａ、９ｂの回転により摺動するので、摺動による摩擦を低減するために摩擦低減部材１５を挟むとよい。この摩擦低減部材１５としてはフッ素樹脂製の薄い板状のもの、フッ素樹脂シート、フッ素樹脂をコーティングしたシート等を用いればよい。摩擦低減部材１５は駆動軸９ａ、９ｂとフランジ８との間にそれぞれ設けられることが望ましいが、いずれか一方であってもよい。 Since the drive shafts 9a and 9b slide between the drive shafts 9a and 9b and the flange 8 as the drive shafts 9a and 9b rotate, a friction reduction member 15 may be interposed therebetween in order to reduce the friction caused by the sliding. As the friction reducing member 15, a thin fluororesin plate, a fluororesin sheet, a fluororesin-coated sheet, or the like may be used. The friction reducing member 15 is desirably provided between the drive shafts 9a, 9b and the flange 8, but may be provided on either one of them.

図３は、実施の形態１に係る気密駆動部において、駆動軸９ａ、９ｂに対する永久磁石１１の配置例を示す図である。図４及び図５は駆動軸９ａ、９ｂに対する永久磁石１１の他の配置例を示す図である。それぞれ永久磁石１１が１個、２個、４個配置した場合の例を示しており、駆動軸９ａ、９ｂの中心から離れた位置に永久磁石１１を配置している。フランジ８を挟んだ駆動軸９ａ、９ｂの永久磁石１１に必要な吸引力は断路器等の開閉器に必要な駆動力によって変わるため、必要に応じて永久磁石の磁束密度、駆動軸９ａ、９ｂの中心からの距離、永久磁石１１の個数を変えればよい。なお、駆動軸９ａ、９ｂの中心に永久磁石１１を１個配置すると、駆動軸９ｂを回転しても、駆動軸９ａが滑って回転駆動しない場合もある。しかし、駆動軸９ａ、９ｂの中心から離れた位置に永久磁石１１を配置すると回転モーメントにより回転駆動力が伝達されるようになる。また、複数配置する場合、軸の中心に対して点対称に配置することが望ましい。 FIG. 3 is a diagram showing an arrangement example of the permanent magnets 11 with respect to the drive shafts 9a and 9b in the airtight drive section according to the first embodiment. 4 and 5 are diagrams showing other examples of arrangement of the permanent magnets 11 with respect to the drive shafts 9a and 9b. 1, 2 and 4 permanent magnets 11 are shown, respectively, and the permanent magnets 11 are arranged away from the centers of the drive shafts 9a and 9b. Since the attractive force required for the permanent magnets 11 of the drive shafts 9a and 9b sandwiching the flange 8 varies depending on the drive force required for a switch such as a disconnecting switch, the magnetic flux density of the permanent magnets and the drive shafts 9a and 9b may be changed as necessary. , and the number of permanent magnets 11 may be changed. When one permanent magnet 11 is arranged at the center of the drive shafts 9a and 9b, even if the drive shaft 9b is rotated, the drive shaft 9a may slip and may not be rotationally driven. However, when the permanent magnets 11 are arranged at positions away from the centers of the drive shafts 9a and 9b, the rotational driving force is transmitted by the rotational moment. Moreover, when arranging a plurality of them, it is desirable to arrange them symmetrically with respect to the center of the axis.

なお、永久磁石１１は駆動軸９ａ、９ｂの端面が平滑になるように埋め込まれ、接着樹脂あるいは締結部材等により固定されている。 The permanent magnets 11 are embedded in the driving shafts 9a and 9b so that the end surfaces thereof are smooth, and are fixed by an adhesive resin or a fastening member.

以上のように、本実施の形態１に係るガス絶縁開閉装置によれば、回転駆動により開閉動作を行う開閉器において、密閉容器内の開閉器を開閉動作させる第一の駆動軸と密閉容器外の操作機構部が具備し第一の駆動軸に回転駆動力を伝達させる第二の駆動軸とを非磁性材料からなるフランジを挟んで対向させ、２つの駆動軸が対向する面にそれぞれ永久磁石を設けて吸引するように配置したので、開閉器を収納している密閉容器の気密を維持した状態で回転駆動力を伝達することが可能となる。 As described above, according to the gas-insulated switchgear according to the first embodiment, in the switch that opens and closes by rotational drive, the first drive shaft for opening and closing the switch inside the closed container and the drive shaft outside the closed container. The second drive shaft provided in the operation mechanism portion of and transmitting the rotational driving force to the first drive shaft is opposed to the flange made of a non-magnetic material, and the two drive shafts face each other with a permanent magnet is provided and arranged so as to attract the switch, it becomes possible to transmit the rotational driving force while maintaining the airtightness of the sealed container housing the switch.

換言すれば、本実施の形態１に係るガス絶縁開閉装置は、密閉容器内に収納された開閉器に対し、密閉容器外から回転駆動力を伝達して開閉器を駆動する操作機構部を備えており、操作機構部から回転駆動力を密閉容器内に伝達する気密駆動部を、密閉容器の非磁性材料からなる非磁性体部を挟んで２つの回転駆動部である駆動軸の先端に永久磁石を用いることで、２つの駆動軸を磁気的に結合して回転駆動力を伝達するように構成したので、気密を維持したまま回転駆動力を伝達可能な気密駆動部が実現し、信頼性の高い開閉器及びそれを具備するガス絶縁開閉装置を提供することが可能となる。 In other words, the gas-insulated switchgear according to the first embodiment includes an operating mechanism section that transmits rotational driving force from outside the sealed container to the switch housed in the sealed container to drive the switch. An airtight drive section that transmits the rotational driving force from the operating mechanism section to the inside of the closed container is permanently attached to the tip of the drive shaft, which is two rotary drive sections, with the non-magnetic body portion made of non-magnetic material of the closed container interposed therebetween. By using a magnet, the two drive shafts are magnetically coupled to transmit the rotational driving force, so an airtight drive unit capable of transmitting the rotational driving force while maintaining the airtightness is realized, resulting in high reliability. It is possible to provide a switch with a high R and a gas-insulated switchgear equipped with the same.

また、２つの駆動軸とフランジとの間にそれぞれ摩擦低減部材を配置することで、駆動軸が回転する際の摺動摩擦を低減することが可能となり、フランジ及び駆動軸の摩耗が低減できるとともに、回転駆動力を円滑にかつ効率よく伝達することができる。 Further, by arranging the friction reducing members between the two drive shafts and the flanges, it is possible to reduce the sliding friction when the drive shafts rotate, thereby reducing the wear of the flanges and the drive shafts. Rotation driving force can be transmitted smoothly and efficiently.

さらに、必要な回転駆動力の伝達は駆動軸に設ける永久磁石の数及び配置により容易に調整が可能となる。 Furthermore, the necessary transmission of the rotational driving force can be easily adjusted by adjusting the number and arrangement of the permanent magnets provided on the drive shaft.

さらに、駆動軸が非磁性となっているので、駆動軸先端の永久磁石周囲に磁性体がなく、永久磁石周囲で磁気回路が閉じる。これにより、密閉容器内外の駆動軸の磁気結合がより強固になり確実な動力伝達が行える。 Furthermore, since the drive shaft is non-magnetic, there is no magnetic material around the permanent magnet at the tip of the drive shaft, and a magnetic circuit is closed around the permanent magnet. As a result, the magnetic coupling between the drive shaft inside and outside the sealed container becomes stronger, and reliable power transmission can be performed.

実施の形態２．
以下に、実施の形態２に係るガス絶縁開閉装置について図を用いて説明する。
図６は、実施の形態２に係るガス絶縁開閉装置１における断路器等の操作機構部２ｂと断路器等の主回路部２ａとの間で回転駆動力を伝達する気密駆動部の概略構成を示す断面図である。ガス絶縁開閉装置１の他の構成は実施の形態１の図１に示されたものと同様であるので、説明は省略する。 Embodiment 2.
A gas-insulated switchgear according to Embodiment 2 will be described below with reference to the drawings.
FIG. 6 shows a schematic configuration of an airtight drive section that transmits rotational driving force between an operation mechanism section 2b such as a disconnector and a main circuit section 2a such as a disconnector in the gas insulated switchgear 1 according to Embodiment 2. It is a sectional view showing. Other configurations of the gas-insulated switchgear 1 are the same as those shown in FIG. 1 of the first embodiment, so description thereof is omitted.

図において、密閉容器７外の断路器等の操作機構部２ｂは回転駆動部である駆動軸９ｂを有し、一方密閉容器７内の断路器等の主回路部２ａは回転駆動部である駆動軸９ａを有している。また、フランジ１２は開口部１３を有し、開口部１３を塞ぐようにフランジ１２よりも厚みの薄い板状の非磁性材料からなる接続部１４が溶接等により取り付けられる。駆動軸９ａ、駆動軸９ｂにはアルミまたはステンレスなどの非磁性材料を使用するのが望ましい。両者は密閉容器７のフランジ１２及び接続部１４によって密閉容器７の内外に仕切られているため、密閉容器７完全に気密密閉された構造が維持される。また、断路器等の主回路部の駆動軸９ａ及び断路器等の操作機構部の駆動軸９ｂの両者が接続部１４を挟んで対向する面側、すなわち先端部には永久磁石１１が設けられている。接続部１４はアルミまたはステンレスなどの非磁性材料が使用されているので、断路器等の主回路部２ａの駆動軸９ａ及び断路器等の操作機構部２ｂの駆動軸９ｂの先端の永久磁石１１同士が接続部１４を挟んで磁力により吸引する構造となっている。 In the figure, an operation mechanism portion 2b such as a disconnector outside the sealed container 7 has a drive shaft 9b which is a rotary drive portion, while a main circuit portion 2a such as a disconnector inside the sealed container 7 is a drive shaft which is a rotary drive portion. It has an axis 9a. The flange 12 has an opening 13, and a connecting portion 14 made of a plate-shaped non-magnetic material thinner than the flange 12 is attached by welding or the like so as to close the opening 13. As shown in FIG. It is desirable to use a non-magnetic material such as aluminum or stainless steel for the drive shafts 9a and 9b. Since both are partitioned into the inside and outside of the closed container 7 by the flange 12 and the connecting portion 14 of the closed container 7, the closed container 7 is completely airtightly sealed. In addition, a permanent magnet 11 is provided on the side where both the drive shaft 9a of the main circuit portion such as the disconnecting switch and the drive shaft 9b of the operating mechanism portion such as the disconnecting switch face each other with the connection portion 14 interposed therebetween, that is, the tip portion thereof. ing. Since a non-magnetic material such as aluminum or stainless steel is used for the connection portion 14, the permanent magnet 11 at the tip of the drive shaft 9a of the main circuit portion 2a such as the disconnector and the drive shaft 9b of the operating mechanism portion 2b such as the disconnector It has a structure in which they are attracted to each other by a magnetic force with the connecting portion 14 interposed therebetween.

次に、実施の形態１と２との相違点について説明する。
実施の形態１では、密閉容器７のフランジ８にアルミまたはステンレスなどの非磁性材料が使用されている例を示した。密閉容器内の圧力が低い場合は、実施の形態１で説明した構成でよいが、密閉容器内の圧力が高い場合、圧力に耐えるために密閉容器のフランジ部の厚みを厚くする必要がある。またアルミは鉄及びステンレスよりも強度的に弱いため、アルミを使用する場合は鉄及びステンレス以上の厚みが必要となる。一方、ステンレスはアルミよりも強度が高いが、鉄に比べると加工性が悪く、コストも高い。さらに、駆動軸９ａ、９ｂの先端の永久磁石はフランジを挟んで吸引しているため、フランジの厚みが厚くなると磁気ギャップが大きくなり吸引力が低下してしまう。 Next, differences between Embodiments 1 and 2 will be described.
In the first embodiment, the flange 8 of the sealed container 7 is made of a non-magnetic material such as aluminum or stainless steel. When the pressure inside the closed container is low, the structure described in Embodiment 1 may be used. However, when the pressure inside the closed container is high, the flange portion of the closed container must be thick to withstand the pressure. Also, since aluminum is weaker than iron and stainless steel in terms of strength, when aluminum is used, a thickness equal to or greater than that of iron and stainless steel is required. On the other hand, stainless steel is stronger than aluminum, but is less workable and more expensive than steel. Furthermore, since the permanent magnets at the tips of the drive shafts 9a and 9b are attracted by sandwiching the flanges, the thicker the flanges, the larger the magnetic gap and the lower the attractive force.

本実施の形態２は、密閉容器７内の圧力が高い場合に適用可能な気密駆動部の構造を示すものである。実施の形態２では、密閉容器７のフランジ１２は安価で強度が強く加工性もよい鉄等の材料を使用する。フランジ１２には駆動軸９ａ、９ｂが挿入可能な駆動軸９ａ、９ｂの直径程度に相当する開口部１３を設けている。開口部１３の内部には、非磁性材料からなる接続部１４を気密溶接等によって接続する。フランジ１２の開口部１３に設けられる接続部１４の厚みはフランジ１２の厚みより薄くすることで、駆動軸９ａ、９ｂの先端の永久磁石１１間の吸引力を維持させる。接続部１４が厚いと吸引力に悪影響する磁気ギャップが大きくなるが、接続部１４を薄くすることで磁気ギャップを最小限にすることができる。 Embodiment 2 shows the structure of an airtight drive unit that can be applied when the pressure inside the sealed container 7 is high. In the second embodiment, the flange 12 of the sealed container 7 is made of a material such as iron that is inexpensive, has high strength, and is easy to work. The flange 12 is provided with openings 13 corresponding to diameters of the drive shafts 9a and 9b into which the drive shafts 9a and 9b can be inserted. A connecting portion 14 made of a non-magnetic material is connected to the inside of the opening 13 by airtight welding or the like. The connecting portion 14 provided in the opening 13 of the flange 12 is thinner than the flange 12, thereby maintaining the attractive force between the permanent magnets 11 at the tips of the drive shafts 9a and 9b. A thick connecting portion 14 increases the magnetic gap that adversely affects the attractive force, but the magnetic gap can be minimized by making the connecting portion 14 thin.

密閉容器７の圧力が高い場合にはフランジ１２の厚みは大きくなるが、開口部１３に設けられる接続部１４の面積は小さいため、部分的に板厚を薄くすることは可能である。そして、開口部１３の接続部１４は気密溶接によりフランジ１２に接合されているため、密閉容器７の気密性は確保されることになる。 When the pressure of the sealed container 7 is high, the thickness of the flange 12 is increased, but since the area of the connecting portion 14 provided in the opening 13 is small, it is possible to partially reduce the plate thickness. Since the connecting portion 14 of the opening 13 is joined to the flange 12 by airtight welding, the airtightness of the sealed container 7 is ensured.

この構成により、接続部１４を介して駆動軸９ａ、９ｂの先端の永久磁石１１同士の吸引力により密閉容器７内外の駆動軸９ａ、９ｂは磁気結合されているので、密閉容器７外の断路器等の操作機構部２ｂの駆動軸９ｂを回転駆動することで、断路器等の主回路部２ａの駆動軸９ａも回転駆動する。したがって、実施の形態１と同様に、密閉容器７の気密を維持した状態で密閉容器７外の断路器等の操作機構部２ｂの回転駆動力を密閉容器７内の断路器等の主回路部２ａに伝達することが可能となる。 With this configuration, the drive shafts 9a and 9b inside and outside the sealed container 7 are magnetically coupled by the attractive force between the permanent magnets 11 at the tips of the drive shafts 9a and 9b through the connecting portion 14, so that the outside of the sealed container 7 is disconnected. By rotationally driving the drive shaft 9b of the operating mechanism portion 2b such as a switch, the drive shaft 9a of the main circuit portion 2a such as a disconnector is also rotationally driven. Therefore, as in the first embodiment, while maintaining the airtightness of the sealed container 7 , the rotational driving force of the operating mechanism 2 b such as the disconnector outside the sealed container 7 is applied to the main circuit unit such as the disconnector inside the sealed container 7 . 2a.

駆動軸９ａ、９ｂと接続部１４との間は駆動軸９ａ、９ｂの回転により摺動するので、実施の形態１と同様に、摺動による摩擦を低減するために摩擦低減部材１５を挟むとよい。この摩擦低減部材１５としてはフッ素樹脂製の薄い板状のもの、フッ素樹脂シート、フッ素樹脂をコーティングしたシート等を用いればよい。摩擦低減部材１５は駆動軸９ａ、９ｂとフランジ８との間にそれぞれ設けられることが望ましいが、いずれか一方であってもよい。 Since the drive shafts 9a and 9b slide between the drive shafts 9a and 9b and the connection portion 14 as the drive shafts 9a and 9b rotate, a friction reduction member 15 may be interposed to reduce the friction caused by sliding, as in the first embodiment. good. As the friction reducing member 15, a thin fluororesin plate, a fluororesin sheet, a fluororesin-coated sheet, or the like may be used. The friction reducing member 15 is desirably provided between the drive shafts 9a, 9b and the flange 8, but may be provided on either one of them.

また、実施の形態１において図３から図５で示した永久磁石１１の配置例を本実施の形態２においても適用することが可能であることは言うまでもない。 It goes without saying that the arrangement examples of the permanent magnets 11 shown in FIGS. 3 to 5 in the first embodiment can also be applied to the second embodiment.

なお、図６に示したとおり、駆動軸９ａ、９ｂをそれぞれ密閉容器７内外からフランジ１２の開口部１３に挿入し嵌め込むことで、開口部１３は駆動軸９ａ、９ｂの軸受けの役割を担う。そのため、別途軸受けを設ける必要がなく、部品点数が削減可能となる。 As shown in FIG. 6, by inserting and fitting the drive shafts 9a and 9b into the openings 13 of the flange 12 from inside and outside the sealed container 7, the openings 13 serve as bearings for the drive shafts 9a and 9b. . Therefore, there is no need to provide a separate bearing, and the number of parts can be reduced.

以上のように、本実施の形態２に係るガス絶縁開閉装置によれば、実施の形態１と同様の効果を奏する。また、開閉器の収納された密閉容器が高圧の場合、開閉器の操作機構部を隔てるフランジの厚みを厚くする必要があるが、操作機構部と主回路部との間で回転駆動力を伝達する気密駆動部において駆動軸の面積程度のみフランジを開口して、フランジの厚みよりも薄い非磁性材料で接続部を構成したので、密閉容器の気密を維持した状態で回転駆動力を伝達することが可能となる。 As described above, according to the gas-insulated switchgear according to the second embodiment, the same effects as those of the first embodiment can be obtained. In addition, when the closed container in which the switch is housed has a high pressure, it is necessary to increase the thickness of the flange that separates the operation mechanism of the switch. In the airtight driving part, the flange is opened only to the extent of the area of the drive shaft, and the connection part is made of a non-magnetic material thinner than the thickness of the flange, so that the rotational driving force can be transmitted while maintaining the airtightness of the closed container. becomes possible.

すなわち、駆動軸９ａと駆動軸９ｂとが永久磁石によって結合するために、駆動軸９ａと駆動軸９ｂとの間が密閉容器７の非磁性体部（接続部１４）であればよい。 That is, since the drive shaft 9a and the drive shaft 9b are coupled by a permanent magnet, it is sufficient that the space between the drive shaft 9a and the drive shaft 9b is the non-magnetic material portion (connection portion 14) of the sealed container 7. FIG.

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。 While this application describes various exemplary embodiments and examples, various features, aspects, and functions described in one or more embodiments may not apply to particular embodiments. can be applied to the embodiments singly or in various combinations.
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：ガス絶縁開閉装置、 ２ａ：断路器等の主回路部、 ２ｂ：断路器等の操作機構部、 ３ａ：遮断器の主回路部、 ３ｂ：遮断器の操作機構部、 ４：ベローズ、 ５：電力ケーブル、 ６，７：密閉容器、 ８：フランジ、 ９ａ，９ｂ：駆動軸、 １０ａ，１０ｂ：軸受部、 １１：永久磁石、 １２：フランジ、 １３：開口部、 １４：接続部、 １５：摩擦低減部材。 1: Gas insulated switchgear 2a: Main circuit part such as disconnector 2b: Operation mechanism part such as disconnector 3a: Main circuit part of circuit breaker 3b: Operation mechanism part of circuit breaker 4: Bellows 5 : Power cable 6, 7: Closed container 8: Flange 9a, 9b: Drive shaft 10a, 10b: Bearing 11: Permanent magnet 12: Flange 13: Opening 14: Connection 15: Friction reducing member.

Claims (6)

密閉容器に収納され第一の駆動軸を有する主回路部と、前記密閉容器の外に配置されるとともに第二の駆動軸を有し前記主回路部の開閉を回転駆動により操作する操作機構部と、を備えた開閉器を搭載したガス絶縁開閉装置であって、
前記第一の駆動軸及び前記第二の駆動軸は非磁性材料からなり、
前記第一の駆動軸と前記第二の駆動軸とは前記密閉容器の非磁性体部を介して対向するとともに同軸に配置され、
前記第一の駆動軸及び前記第二の駆動軸の互いに対向する面側にそれぞれ永久磁石が設けられたガス絶縁開閉装置。 A main circuit unit housed in a closed container and having a first drive shaft, and an operation mechanism unit arranged outside the closed container and having a second drive shaft for operating the opening and closing of the main circuit unit by rotational drive. and a gas insulated switchgear equipped with a switch comprising
the first drive shaft and the second drive shaft are made of a non-magnetic material;
The first drive shaft and the second drive shaft are arranged coaxially and face each other with the non-magnetic material portion of the sealed container interposed therebetween,
A gas-insulated switchgear, wherein permanent magnets are provided on the surfaces of the first drive shaft and the second drive shaft facing each other. 前記密閉容器は非磁性材料からなるフランジを有し、
前記第一の駆動軸と前記第二の駆動軸とは前記フランジを介して対向して配置されている請求項１に記載のガス絶縁開閉装置。 The closed container has a flange made of a non-magnetic material,
2. The gas-insulated switchgear according to claim 1, wherein said first drive shaft and said second drive shaft are arranged to face each other via said flange. 前記密閉容器はフランジを有し、
前記フランジは前記第一の駆動軸及び前記第二の駆動軸が嵌め込まれる開口部と、前記開口部に気密接続された接続部とを有し、
前記接続部は前記フランジの厚みよりも薄くかつ非磁性材料からなり、
前記第一の駆動軸と前記第二の駆動軸とは前記接続部を介して対向して配置されている請求項１に記載のガス絶縁開閉装置。 The closed container has a flange,
The flange has an opening into which the first drive shaft and the second drive shaft are fitted, and a connecting portion airtightly connected to the opening,
The connecting portion is thinner than the thickness of the flange and is made of a non-magnetic material,
2. The gas insulated switchgear according to claim 1, wherein said first drive shaft and said second drive shaft are arranged to face each other with said connection portion interposed therebetween. 前記永久磁石は、前記第一の駆動軸及び前記第二の駆動軸の互いに対向する面側において、それぞれ軸中心から離れた位置に配置されている請求項１から３のいずれか１項に記載のガス絶縁開閉装置。 4. The permanent magnet according to any one of claims 1 to 3, wherein the permanent magnets are arranged at positions away from the center of each of the surfaces of the first drive shaft and the second drive shaft that face each other. gas insulated switchgear. 前記第一の駆動軸と前記密閉容器の非磁性体部との間に摩擦低減部材が配置されている請求項１から４のいずれか１項に記載のガス絶縁開閉装置。 5. The gas insulated switchgear according to claim 1, wherein a friction reducing member is arranged between said first drive shaft and said non-magnetic material portion of said sealed container. 前記第二の駆動軸と前記密閉容器の非磁性体部との間に摩擦低減部材が配置されている請求項１から５のいずれか１項に記載のガス絶縁開閉装置。 6. The gas insulated switchgear according to any one of claims 1 to 5, wherein a friction reducing member is arranged between the second drive shaft and the non-magnetic portion of the sealed container.
JP2021010761A 2021-01-27 2021-01-27 gas insulated switchgear Pending JP2022114495A (en)

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