JP2022094013A - Switch - Google Patents

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JP2022094013A
JP2022094013A JP2020206784A JP2020206784A JP2022094013A JP 2022094013 A JP2022094013 A JP 2022094013A JP 2020206784 A JP2020206784 A JP 2020206784A JP 2020206784 A JP2020206784 A JP 2020206784A JP 2022094013 A JP2022094013 A JP 2022094013A
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Prior art keywords
switch
insulating layer
operation rod
insulating
vacuum valve
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JP7441160B2 (en
Inventor
喬文 細野
Takafumi Hosono
将人 小林
Masato Kobayashi
隆 佐藤
Takashi Sato
誠 寺井
Makoto Terai
幸三 田村
Kozo Tamura
慎一 芝山
Shinichi Shibayama
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Hitachi Industrial Equipment Systems Co Ltd
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Hitachi Industrial Equipment Systems Co Ltd
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Priority to JP2020206784A priority Critical patent/JP7441160B2/en
Priority to PCT/JP2021/041643 priority patent/WO2022130851A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

To provide a switch that eliminates the need for maintenance work such as replacement of desiccant and can improve insulation performance.SOLUTION: A switch includes a vacuum valve connected to a movable side conductor, an insulating layer that covers the vacuum valve, an insulation operation rod connected to the movable side conductor, and an operation mechanism that is connected to the insulation operation rod and operates the movable side conductor, and the insulating layer has a shield inside and has an insulator on the side of the insulation operation rod.SELECTED DRAWING: Figure 1

Description

本発明は、開閉器に関し、特に固体絶縁形の開閉器に関する。 The present invention relates to a switch, and more particularly to a solid-insulated switch.

固体絶縁形の開閉器は、遮断部を内包する真空バルブの周囲を固体絶縁物で覆うことで、絶縁性能を強化した開閉器である。真空バルブの可動側には、可動側導体を操作するための絶縁操作ロッドが連結されており、さらに絶縁操作ロッドの他端部には操作機構が連結されている。このため、真空バルブの可動側は固体絶縁物で覆うことができず、特別な処置を施さない限りは気中部となる。 The solid-insulated switch is a switch with enhanced insulation performance by covering the circumference of the vacuum valve containing the cutoff portion with a solid insulator. An insulating operation rod for operating the movable side conductor is connected to the movable side of the vacuum valve, and an operation mechanism is connected to the other end of the insulating operation rod. Therefore, the movable side of the vacuum valve cannot be covered with a solid insulating material, and is an aerial part unless special measures are taken.

固体絶縁形の開閉器として特許文献１が知られている。特許文献１は、モールドされた真空バルブと操作機構とを連結する可動側絶縁体の空間部を簡易な構造で除湿する技術を開示する。 Patent Document 1 is known as a solid-insulated switch. Patent Document 1 discloses a technique for dehumidifying a space portion of a movable side insulator connecting a molded vacuum valve and an operation mechanism with a simple structure.

特開２０１４－１２０２５０号公報Japanese Unexamined Patent Publication No. 2014-120250

気中部はその周囲環境により絶縁性能が変化し、特に高湿度の場合には固体絶縁物表面に付着した水分により沿面放電が発生しやすくなるため、絶縁弱点部となりやすい。このような問題に対し、特許文献１では、気中部を封止し、その内部に乾燥剤を設置することで、高湿度対策を施し絶縁性能を維持している。 The insulation performance of the aerial part changes depending on the surrounding environment, and especially in the case of high humidity, creeping discharge is likely to occur due to the moisture adhering to the surface of the solid insulator, so that the aerial part tends to be a weak point of insulation. In response to such a problem, Patent Document 1 seals the aerial part and installs a desiccant inside the air to take measures against high humidity and maintain the insulating performance.

しかし、封止状態の悪化により気中部の湿度が高くなる可能性がある。また、乾燥剤の水分吸着量が一定量を超えると湿度が高くなる。そのため、封止状態の確認や乾燥剤の交換といった定期的なメンテナンス作業が発生する。 However, the humidity in the aerial part may increase due to the deterioration of the sealed state. Further, when the amount of water adsorbed by the desiccant exceeds a certain amount, the humidity becomes high. Therefore, regular maintenance work such as confirmation of the sealing state and replacement of the desiccant is required.

本発明の目的は、乾燥剤の交換といったメンテナンス作業を不要にし、絶縁性能を向上できる開閉器を提供することにある。 An object of the present invention is to provide a switch that eliminates maintenance work such as replacement of a desiccant and can improve insulation performance.

本発明の好ましい一例としては、可動側導体と連結した真空バルブと、前記真空バルブを覆う絶縁層と、前記可動側導体に連結される絶縁操作ロッドと、前記絶縁操作ロッドに連結され、前記可動側導体を動作させる操作機構とを有し、
前記絶縁層は、内部にシールドを有し、前記絶縁操作ロッドの側に絶縁物を有する開閉器である。 As a preferable example of the present invention, a vacuum valve connected to the movable side conductor, an insulating layer covering the vacuum valve, an insulating operation rod connected to the movable side conductor, and the movable side connected to the insulating operation rod. It has an operation mechanism to operate the side conductor,
The insulating layer is a switch having a shield inside and an insulator on the side of the insulating operation rod.

本発明によれば、乾燥剤の交換といったメンテナンス作業を不要にし、絶縁性能を向上できる。 According to the present invention, maintenance work such as replacement of a desiccant is unnecessary, and insulation performance can be improved.

実施例１の開閉器の縦方向の内部構成図である。It is a vertical internal block diagram of the switch of Example 1. FIG. 実施例２の開閉器の縦方向の内部構成図である。It is a vertical internal block diagram of the switch of Example 2. FIG. 実施例３の開閉器の縦方向の内部構成図である。It is a vertical internal block diagram of the switch of Example 3. FIG.

以下、本発明を実施する上で好適となる実施例について図面を用いて説明する。尚、下記はあくまでも実施の例に過ぎず、発明の内容が下記具体的態様に限定されるものではない。本発明は、下記態様を含めて種々の態様に変形することが無論可能である。 Hereinafter, examples suitable for carrying out the present invention will be described with reference to the drawings. It should be noted that the following is merely an example of implementation, and the content of the invention is not limited to the following specific embodiments. Of course, the present invention can be transformed into various aspects including the following aspects.

実施例１について図１を用いて説明する。 The first embodiment will be described with reference to FIG.

図１に示す如く、本実施例の開閉器は、図示されていない接離自在な対となる電極（固定電極と可動電極）を収納する真空バルブ１と、真空バルブ１を覆う絶縁層２と、絶縁層２の開口部を覆うフランジ６と、真空バルブ１と連結する可動側導体３と、可動側導体３に連結される絶縁操作ロッド４と、絶縁操作ロッド４の真空バルブ１との連結部と反対側の端部である他端において連結され、可動側導体３を動作させることが可能な操作機構７とで構成される。 As shown in FIG. 1, the switch of the present embodiment has a vacuum valve 1 for accommodating a pair of electrodes (fixed electrode and movable electrode) which are not shown and can be detached from each other, and an insulating layer 2 for covering the vacuum valve 1. , The flange 6 covering the opening of the insulating layer 2, the movable side conductor 3 connected to the vacuum valve 1, the insulating operation rod 4 connected to the movable side conductor 3, and the vacuum valve 1 of the insulating operation rod 4. It is composed of an operation mechanism 7 that is connected at the other end, which is the end on the opposite side of the portion, and is capable of operating the movable side conductor 3.

絶縁操作ロッド４の周囲を覆う絶縁層２の内部にはシールド８が配置されており、可動側導体３や絶縁操作ロッド４の電界を緩和する構成となっている。シールド８は、上面もしくは下面から見たときは、円筒状に絶縁操作ロッド４の周囲を囲う形状である。 A shield 8 is arranged inside the insulating layer 2 that covers the periphery of the insulating operating rod 4, and is configured to relax the electric field of the movable side conductor 3 and the insulating operating rod 4. The shield 8 has a shape that surrounds the circumference of the insulating operation rod 4 in a cylindrical shape when viewed from the upper surface or the lower surface.

絶縁層２の内壁はシールド８の先端近傍で電界が高いため、放電の起点なる。そのため、対策として、絶縁層２の絶縁操作ロッド４側に、凸部を有する縦用ゴム部品９Ａを取り付け、下方に向かって内径が広がる絶縁層２の内壁から発生する放電を抑制する。 Since the inner wall of the insulating layer 2 has a high electric field near the tip of the shield 8, it becomes a starting point of discharge. Therefore, as a countermeasure, a vertical rubber component 9A having a convex portion is attached to the insulating operation rod 4 side of the insulating layer 2 to suppress the discharge generated from the inner wall of the insulating layer 2 whose inner diameter expands downward.

シールド８は、絶縁層２の内部に配置され、凸部を有する縦用ゴム部品９Ａといった絶縁物より真空バルブ１側に配置されている。そのような構成により上記したようにシールドの先端からの放電を抑制できる。 The shield 8 is arranged inside the insulating layer 2 and is arranged on the vacuum valve 1 side of an insulating material such as a vertical rubber component 9A having a convex portion. With such a configuration, discharge from the tip of the shield can be suppressed as described above.

ただし、真空バルブの動作や地震などの振動でゴム部品の配置が変わると絶縁弱点部をゴム部品で覆うことができなくなる。そこで、絶縁操作ロッド４の周囲を覆う絶縁層２の内壁に、絶縁層縦方向凹み部バルブ側２Ａと絶縁層縦方向凹み部フランジ側２Ｂをもうけ、それらに凸部を有する縦用ゴム部品９Ａをひっかける。ゴム部品が凹部内で伸長してゴムがずれること防ぐことができるので、絶縁物（凸部を有する縦用ゴム部品９Ａ）を絶縁層２の内壁に固定できる。凸部を有する縦用ゴム部品９Ａは、メンテナンスで交換する際にも、ゴム部品なので簡易に交換ができる。 However, if the arrangement of the rubber parts changes due to the operation of the vacuum valve or vibration such as an earthquake, the insulation weak points cannot be covered with the rubber parts. Therefore, a vertical rubber component 9A having an insulating layer vertical recessed portion valve side 2A and an insulating layer vertical recessed portion flange side 2B are provided on the inner wall of the insulating layer 2 covering the periphery of the insulating operation rod 4, and the insulating layer vertical recessed portion flange side 2B is provided therein. To catch. Since the rubber component can be prevented from stretching in the concave portion and the rubber from shifting, the insulating material (vertical rubber component 9A having a convex portion) can be fixed to the inner wall of the insulating layer 2. The vertical rubber part 9A having a convex portion is a rubber part and can be easily replaced even when it is replaced for maintenance.

なお、図１では絶縁層の縦方向凹み部の数を、左右の内壁それぞれに２個としているが、絶縁層の縦方向凹み部の数は１個以上であればよく、凸部を有する縦用ゴム部品９Ａに伝わる振動の強さによって、絶縁層の縦方向凹み部の数を変更してよい。 In FIG. 1, the number of vertical recesses in the insulating layer is two for each of the left and right inner walls, but the number of vertical recesses in the insulating layer may be one or more, and the vertical recesses having convex portions are sufficient. The number of vertical recesses of the insulating layer may be changed depending on the strength of the vibration transmitted to the rubber component 9A.

絶縁操作ロッド４の動作時に凸部を有する縦用ゴム部品９Ａと絶縁操作ロッド４が触れると動作スピードが落ちたり、凸部を有する縦用ゴム部品９Ａが破損する可能性がある。そのため、凸部を有する縦用ゴム部品９Ａの中心には絶縁操作ロッド４の外径よりも大きな半径の穴が開いている。つまり、絶縁物は、円筒状の中空を備える形状を有し、絶縁操作ロッド４の外径より大きい内径を有する。凸部を有する縦用ゴム部品９Ａと絶縁層２に隙間があると弱点部となるので、グリスや接着剤をつけると良い。 If the vertical rubber component 9A having a convex portion and the insulating operation rod 4 come into contact with each other during the operation of the insulating operation rod 4, the operating speed may decrease or the vertical rubber component 9A having the convex portion may be damaged. Therefore, a hole having a radius larger than the outer diameter of the insulating operation rod 4 is opened in the center of the vertical rubber component 9A having the convex portion. That is, the insulator has a shape having a cylindrical hollow shape, and has an inner diameter larger than the outer diameter of the insulation operation rod 4. If there is a gap between the vertical rubber part 9A having a convex portion and the insulating layer 2, it becomes a weak point portion, so it is advisable to apply grease or an adhesive.

なお、絶縁層の隙間をなくすために凸部を有する絶縁物はゴムとしたが、ゴムに限らず弾性体であればよい。また、隙間が発生しないのであれば絶縁性のある他の部材に変えてもよい。 Although rubber is used as the insulating material having a convex portion in order to eliminate the gap between the insulating layers, it is not limited to rubber and may be an elastic body. Further, if no gap is generated, another member having insulating properties may be used.

本実施例では、絶縁層２の方を凹部とし、その内壁に取り付ける絶縁物の形状を凸部としたが、互いに逆の形状であっても、嵌め合うことで固定される形状であればよい。 In this embodiment, the insulating layer 2 has a concave portion and the shape of the insulating material attached to the inner wall thereof has a convex portion. However, even if the shapes are opposite to each other, the shape may be fixed by fitting. ..

本実施例によれば、乾燥剤は必要ないので、乾燥剤の交換といったメンテナンス作業は不要であり、絶縁層２の内壁における絶縁性能を向上できる。また、気中部を封止する封止板を配置する必要はない。そのため可動側導体の操作性は向上できる。 According to this embodiment, since no desiccant is required, maintenance work such as replacement of the desiccant is unnecessary, and the insulating performance on the inner wall of the insulating layer 2 can be improved. Further, it is not necessary to arrange a sealing plate for sealing the aerial portion. Therefore, the operability of the movable conductor can be improved.

実施例２について図２を用いて説明する。尚、実施例１と重複する箇所については、ここでの説明を省略する。 The second embodiment will be described with reference to FIG. The points that overlap with those of the first embodiment will be omitted here.

図1では絶縁層２の内壁に縦方向に凹み部を設けて凸部を有する縦用ゴム部品９Ａのずれを対策した。ただし、凹または凸の形状は縦の必要はなく横方向でもよい。 In FIG. 1, a concave portion is provided in the vertical direction on the inner wall of the insulating layer 2 to prevent the vertical rubber component 9A having the convex portion from being displaced. However, the concave or convex shape does not have to be vertical and may be horizontal.

本実施例では、図２に示すように絶縁操作ロッド４の周囲を覆う絶縁層２の内壁に、絶縁層横方向凹み部バルブ側２Ｃと絶縁層横方向凹み部フランジ側２Ｄを設け、凸部を有する横用ゴム部品９Ｂをひっかけることで凸部を有する横用ゴム部品９Ｂのずれを対策できる。 In this embodiment, as shown in FIG. 2, the insulating layer laterally recessed portion valve side 2C and the insulating layer laterally recessed portion flange side 2D are provided on the inner wall of the insulating layer 2 covering the periphery of the insulating operation rod 4, and the convex portion is provided. By hooking the horizontal rubber part 9B having a convex portion, it is possible to take measures against the displacement of the horizontal rubber part 9B having a convex portion.

なお、図２では絶縁層横方向凹み部の数を、左右の内壁それぞれに２個としているが、絶縁層横方向凹み部の数は１個以上であればよく、ゴムに伝わる振動の強さによって数を変更するとよい。 In FIG. 2, the number of lateral recesses in the insulating layer is two for each of the left and right inner walls, but the number of lateral recesses in the insulating layer may be one or more, and the strength of vibration transmitted to the rubber is sufficient. It is good to change the number by.

本実施例によれば、実施例１と同じ効果を有する。さらに、凸部を有する横用ゴム部品９Ｂを絶縁層の内壁にはめ込むので、縦方向の力に対してより固定しやすくできる。 According to this embodiment, it has the same effect as that of Example 1. Further, since the horizontal rubber component 9B having the convex portion is fitted into the inner wall of the insulating layer, it can be more easily fixed to the force in the vertical direction.

実施例３について図３を用いて説明する。尚、実施例１と実施例２と重複する箇所については、ここでの説明を省略する。 Example 3 will be described with reference to FIG. The points that overlap with those of the first and second embodiments will be omitted here.

図１における気中部５を、図３では封止板１０で封止している。絶縁操作ロッド４が配置されている空間を、真空引きした後に、ガス１１を封入する。沿面放電とギャップ放電はガス中でも同様の効果があると考えられるため、開閉器をより小形にすることができる。ガスは絶縁性のある気体で、例えばSF6、二酸化酸素、窒素、乾燥空気が想定される。また、図３では、実施例１（図１）の構成を前提にした例を示したが、実施例２（図２）についても、実施例３は同様に適用でき、同様の効果が得られる。 The aerial portion 5 in FIG. 1 is sealed with a sealing plate 10 in FIG. After evacuating the space where the insulation operation rod 4 is arranged, the gas 11 is sealed. Since creeping discharge and gap discharge are considered to have the same effect even in gas, the switch can be made smaller. The gas is an insulating gas, for example SF6, oxygen dioxide, nitrogen, and dry air are assumed. Further, in FIG. 3, an example is shown on the premise of the configuration of Example 1 (FIG. 1), but Example 2 can be similarly applied to Example 2 (FIG. 2), and the same effect can be obtained. ..

本実施例によれば、乾燥剤の交換といったメンテナンス作業は不要であり、絶縁層２の内壁における絶縁性能を向上できる。また、絶縁性のある気体を封入しているので開閉器をより小形にすることができる。 According to this embodiment, maintenance work such as replacement of the desiccant is unnecessary, and the insulation performance of the inner wall of the insulating layer 2 can be improved. In addition, since the switch is filled with an insulating gas, the switch can be made smaller.

上記の実施例では、真空バルブ１が操作機構７の上部にある開閉器を例に説明したが、操作機構７が、真空バルブ１の上部にある開閉器であってもよい。また、操作機構７と真空バルブ１が水平方向に配置されていてもよい。 In the above embodiment, the switch whose vacuum valve 1 is located above the operating mechanism 7 has been described as an example, but the operating mechanism 7 may be a switch located above the vacuum valve 1. Further, the operation mechanism 7 and the vacuum valve 1 may be arranged in the horizontal direction.

１ 真空バルブ
２ 絶縁層
２Ａ 絶縁層縦方向凹み部バルブ側
２Ｂ 絶縁層縦方向凹み部フランジ側
２Ｃ 絶縁層横方向凹み部バルブ側
２Ｄ 絶縁層横方向凹み部フランジ側
３ 可動側導体
４ 絶縁操作ロッド
５ 気中部
６ フランジ
７ 操作機構
８ シールド
９Ａ 凸部を有する縦用ゴム部品
９Ｂ 凸部を有する横用ゴム部品
１０ 封止板
１１ ガス 1 Vacuum valve 2 Insulation layer 2A Insulation layer Vertical recess Valve side 2B Insulation layer Vertical recess Flange side 2C Insulation layer Horizontal recess Valve side 2D Insulation layer Horizontal recess Flange side 3 Movable side conductor 4 Insulation operation rod 5 Air central part 6 Flange 7 Operation mechanism 8 Shield 9A Vertical rubber part with convex part 9B Horizontal rubber part with convex part 10 Sealing plate 11 Gas

Claims (7)

可動側導体と連結した真空バルブと、
前記真空バルブを覆う絶縁層と、
前記可動側導体に連結される絶縁操作ロッドと、
前記絶縁操作ロッドに連結され、前記可動側導体を動作させる操作機構とを有し、
前記絶縁層は、
内部にシールドを有し、前記絶縁操作ロッドの側に絶縁物を有する開閉器。 A vacuum valve connected to the movable conductor and
The insulating layer covering the vacuum valve and
Insulation operation rod connected to the movable side conductor,
It has an operation mechanism that is connected to the insulation operation rod and operates the movable side conductor.
The insulating layer is
A switch having a shield inside and an insulator on the side of the insulation operation rod. 請求項１に記載の開閉器において、
前記絶縁物は、弾性体である開閉器。 In the switch according to claim 1,
The insulator is a switch which is an elastic body. 請求項１に記載の開閉器において、
前記絶縁物は、前記絶縁操作ロッドの外径より大きい内径を有する開閉器。 In the switch according to claim 1,
The insulation is a switch having an inner diameter larger than the outer diameter of the insulation operation rod. 請求項１に記載の開閉器において、
前記絶縁物は、前記絶縁層の内壁に固定される開閉器。 In the switch according to claim 1,
The insulator is a switch fixed to the inner wall of the insulating layer. 請求項４に記載の開閉器において、
前記絶縁層の内壁に凹部もしくは凸部があり、前記凹部もしくは前記凸部に前記絶縁物が固定される開閉器。 In the switch according to claim 4,
A switch having a concave portion or a convex portion on the inner wall of the insulating layer, and the insulating material is fixed to the concave portion or the convex portion. 請求項１に記載の開閉器において、
前記操作機構の側に封止板が配置され、
前記絶縁操作ロッドが配置される空間に絶縁性のあるガスが封入される開閉器。 In the switch according to claim 1,
A sealing plate is placed on the side of the operating mechanism.
A switch in which an insulating gas is sealed in the space where the insulating operation rod is arranged. 請求項１に記載の開閉器において、
前記シールドは、前記絶縁物より、前記真空バルブ側に配置される開閉器。 In the switch according to claim 1,
The shield is a switch arranged on the vacuum valve side of the insulator.
JP2020206784A 2020-12-14 2020-12-14 switch Active JP7441160B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8466385B1 (en) * 2011-04-07 2013-06-18 Michael David Glaser Toroidal vacuum interrupter for modular multi-break switchgear
US8471166B1 (en) * 2011-01-24 2013-06-25 Michael David Glaser Double break vacuum interrupter
JP2020145140A (en) * 2019-03-08 2020-09-10 株式会社日立産機システム Vacuum switch
JP2020198278A (en) * 2019-06-05 2020-12-10 株式会社東芝 Vacuum valve, switch gear, and method for manufacturing vacuum valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8471166B1 (en) * 2011-01-24 2013-06-25 Michael David Glaser Double break vacuum interrupter
US8466385B1 (en) * 2011-04-07 2013-06-18 Michael David Glaser Toroidal vacuum interrupter for modular multi-break switchgear
JP2020145140A (en) * 2019-03-08 2020-09-10 株式会社日立産機システム Vacuum switch
JP2020198278A (en) * 2019-06-05 2020-12-10 株式会社東芝 Vacuum valve, switch gear, and method for manufacturing vacuum valve

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