JP2018147643A - Vacuum circuit breaker - Google Patents

Vacuum circuit breaker Download PDF

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Publication number
JP2018147643A
JP2018147643A JP2017040226A JP2017040226A JP2018147643A JP 2018147643 A JP2018147643 A JP 2018147643A JP 2017040226 A JP2017040226 A JP 2017040226A JP 2017040226 A JP2017040226 A JP 2017040226A JP 2018147643 A JP2018147643 A JP 2018147643A
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Prior art keywords
circuit breaker
vacuum circuit
vacuum
inspection
fixed
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JP2017040226A
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JP6776156B2 (en
Inventor
佐藤　和弘
Kazuhiro Sato
和弘 佐藤
佐藤　隆
Takashi Sato
隆 佐藤
雅人 藪
Masato Yabu
雅人 藪
幸三 田村
Kozo Tamura
幸三 田村
裕己 田井
Hiromi Tai
裕己 田井
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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 JP2017040226A priority Critical patent/JP6776156B2/en
Priority to EP18156010.3A priority patent/EP3370243B1/en
Priority to CN201810145235.8A priority patent/CN108538680B/en
Publication of JP2018147643A publication Critical patent/JP2018147643A/en
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Publication of JP6776156B2 publication Critical patent/JP6776156B2/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
    • H01H33/60—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
    • H01H33/666—Operating arrangements
    • 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
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • 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
    • H01H33/027—Integrated apparatus for measuring current or voltage
    • 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
    • H01H33/668—Means for obtaining or monitoring the vacuum
    • 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
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings

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  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce, without increasing the weight and size of a vacuum circuit breaker, the deflection of a housing of an operating mechanism part by reducing stress due to shock and vibration associated with an opening and closing operation of the vacuum circuit breaker so that reliability with respect to the opening and closing operation can be improved.SOLUTION: A vacuum circuit breaker includes: a vacuum valve in which at least a fixed side electrode and a movable side electrode are stored and the periphery of which is covered with a mold part; and an operating mechanism part to drive the movable side electrode. The vacuum valve and the operating mechanism part are disposed on a straight line, and there is provided a fixing member stretched over the mold part of the vacuum valve and the operating mechanism part to fix the mold part and the operating mechanism part.SELECTED DRAWING: Figure 1

Description

本発明は真空遮断器に係り、特に、真空バルブを固体絶縁物でモールドしたモールド真空バルブを適用したものに好適な真空遮断器に関する。   The present invention relates to a vacuum circuit breaker, and more particularly to a vacuum circuit breaker suitable for a mold vacuum valve in which a vacuum valve is molded with a solid insulator.

真空遮断器に関する従来技術としては、特許文献１に記載されたものがある。この特許文献１には、真空遮断器又は真空断路器等のバルブを含む開閉機器をスッチギヤの内部に収納し、電源系統を構成する密閉型のスイッチギヤとして、スイッチギヤ構成機器と、スイッチギヤ構成機器を絶縁するための絶縁部と、スイッチギヤ構成機器を垂直方向に接合するための接合部とを含む複数のコンポーネントを具備し、複数のコンポーネントを垂直方向に接合するスイッチギヤが記載されている。   As a prior art regarding a vacuum circuit breaker, there exists what was described in patent document 1. FIG. This Patent Document 1 discloses a switchgear component device and a switchgear configuration as a sealed switchgear that houses a switchgear including a valve such as a vacuum circuit breaker or a vacuum disconnector in a switchgear and constitutes a power supply system. A switchgear that includes a plurality of components including an insulating part for insulating equipment and a joint part for joining switchgear components in a vertical direction, and that joins the plurality of components in a vertical direction is described. .

特開２００３−３３３７１５号公報JP 2003-333715 A

上述した特許文献１のスイッチギヤは、真空バルブを固体絶縁物で覆ったモールド真空バルブを適用した真空遮断器を搭載しているが、モールド真空バルブは、操作室の天板にのみ接触した構成となっている。つまり、モールド真空バルブは、操作機構部の天板に接触している箇所で固定されることになる。具体的には、操作機構部の天板に接触しているモールド部にナットまたはボルトなどの固定部品を埋め込み、この固定部品により操作機構部の天板に固定される。   The switch gear of Patent Document 1 described above is equipped with a vacuum circuit breaker to which a mold vacuum valve is applied with a vacuum valve covered with a solid insulator, but the mold vacuum valve is in contact with only the top plate of the operation chamber. It has become. That is, the mold vacuum valve is fixed at a position where the mold vacuum valve is in contact with the top plate of the operation mechanism unit. Specifically, a fixing part such as a nut or a bolt is embedded in a mold part that is in contact with the top plate of the operation mechanism unit, and the fixing part is fixed to the top plate of the operation mechanism unit.

しかし、この特許文献１の構成では、操作機構部の駆動、即ち、真空遮断器の開閉動作での衝撃や振動により、ボルトまたはナットに緩みが発生し、開閉動作が安定しないことが懸念される。また、真空遮断器の開閉動作での衝撃や振動により、操作機構部の筺体に撓みが発生し、開閉動作速度が低下することも懸念される。   However, in the configuration of Patent Document 1, there is a concern that the bolts or nuts are loosened due to impact or vibration during the operation of the operating mechanism, that is, the opening / closing operation of the vacuum circuit breaker, and the opening / closing operation is not stable. . There is also a concern that the shock of the opening / closing operation of the vacuum circuit breaker may cause bending of the casing of the operation mechanism unit, resulting in a decrease in the opening / closing operation speed.

これらの対策として、ボルトまたはナットのサイズを大きくして、固定部品の締結力を増加させることや、操作機構部の筺体の板厚を増加して撓みを抑制することが考えられるが、必然的に真空遮断器の重量、サイズが増加する問題がある。   As countermeasures for this, it is conceivable to increase the fastening force of the fixed parts by increasing the size of the bolt or nut, or to increase the plate thickness of the casing of the operation mechanism section to suppress bending. However, there is a problem that the weight and size of the vacuum circuit breaker increase.

本発明は上述の点に鑑みなされたもので、その目的とするところは、真空遮断器の重量やサイズを増加させることなく、真空遮断器の開閉動作に伴う衝撃や振動による応力を軽減して操作機構部の筺体の撓みを低減し、開閉動作に対する信頼性を向上させることができる真空遮断器を提供することにある。   The present invention has been made in view of the above points, and the object of the present invention is to reduce the stress caused by shock and vibration associated with the opening / closing operation of the vacuum circuit breaker without increasing the weight and size of the vacuum circuit breaker. An object of the present invention is to provide a vacuum circuit breaker that can reduce the bending of the casing of the operation mechanism and improve the reliability of the opening / closing operation.

本発明の真空遮断器は、上記目的を達成するために、少なくとも固定側電極及び可動側電極が格納され、周囲がモールド部で覆われている真空バルブと、前記可動側電極を駆動する操作機構部とを備えた真空遮断器であって、前記真空バルブと前記操作機構部が直線上に配置されていると共に、前記真空バルブのモールド部と前記操作機構部に跨り両者を固定する固定部材を備えていることを特徴とする。   In order to achieve the above object, a vacuum circuit breaker according to the present invention includes a vacuum valve in which at least a fixed side electrode and a movable side electrode are housed and covered with a mold part, and an operation mechanism for driving the movable side electrode. A vacuum breaker comprising: a vacuum valve and the operation mechanism portion arranged in a straight line; and a fixing member for fixing both of the vacuum valve mold portion and the operation mechanism portion. It is characterized by having.

本発明によれば、真空遮断器の重量やサイズを増加させることなく、真空遮断器の開閉動作に伴う衝撃や振動による応力を軽減して操作機構部の筺体の撓みを低減し、開閉動作に対する信頼性を向上させることができる。   According to the present invention, without increasing the weight or size of the vacuum circuit breaker, the stress due to shock or vibration associated with the opening / closing operation of the vacuum circuit breaker is reduced, the bending of the housing of the operation mechanism unit is reduced, and the opening / closing operation is prevented. Reliability can be improved.

本発明の真空遮断器の実施例１を示す部分断面図である。It is a fragmentary sectional view which shows Example 1 of the vacuum circuit breaker of this invention. 本発明の真空遮断器の実施例２を示す部分断面図である。It is a fragmentary sectional view which shows Example 2 of the vacuum circuit breaker of this invention. 本発明の真空遮断器の実施例３を示す部分断面図である。It is a fragmentary sectional view which shows Example 3 of the vacuum circuit breaker of this invention. 本発明の真空遮断器の実施例４を示す部分断面図である。It is a fragmentary sectional view which shows Example 4 of the vacuum circuit breaker of this invention. 本発明の真空遮断器の実施例４における真空容器内の圧力と放電開始電圧の関係を表すパッシェンカーブを示す図である。It is a figure which shows the Paschen curve showing the relationship between the pressure in the vacuum vessel in Example 4 of the vacuum circuit breaker of this invention, and a discharge start voltage. 本発明の真空遮断器の実施例５を示し、図２のＡ−Ａ´線に沿った断面に相当する図である。FIG. 6 is a view showing Example 5 of the vacuum circuit breaker of the present invention and corresponding to a cross section taken along line AA ′ of FIG. 2. 本発明の真空遮断器の実施例６を示す部分断面図である。It is a fragmentary sectional view which shows Example 6 of the vacuum circuit breaker of this invention.

以下、図示した実施例に基づいて本発明の真空遮断器を説明する。なお、各実施例において、同一構成部品には同符号を使用する。   Hereinafter, the vacuum circuit breaker of the present invention will be described based on the illustrated embodiment. In addition, in each Example, the same code | symbol is used for the same component.

図１に、本発明の真空遮断器の実施例１を示す。   FIG. 1 shows a first embodiment of the vacuum circuit breaker of the present invention.

該図に示す如く、本実施例の真空遮断器３０Ａは、エポキシ樹脂等の固体絶縁物により一体注型（モールド）されて形成された（周囲がモールド部１Ａで覆われた）真空バルブ１と、固定側ケーブルブッシング導体１５の周囲がモールドされている固定側ケーブルブッシング２と、可動側ケーブルブッシング導体１６の外部の周囲がモールドされている可動側ケーブルブッシング３と、後述する可動側電極１３を操作する操作機構部４とで概略構成されている。通常、エポキシ樹脂等の固体絶縁物により一体注型された真空バルブ１は、モールド真空バルブと呼ばれている。なお、特に図示しないが、モールド部分は通常接地されている。   As shown in the figure, the vacuum circuit breaker 30A of this example is formed by integrally casting (molding) with a solid insulator such as an epoxy resin (the periphery is covered with a mold part 1A), A fixed cable bushing 2 in which the periphery of the fixed cable bushing conductor 15 is molded, a movable cable bushing 3 in which the periphery of the movable cable bushing conductor 16 is molded, and a movable electrode 13 to be described later are provided. An operation mechanism unit 4 to be operated is schematically configured. Usually, the vacuum valve 1 integrally cast with a solid insulator such as an epoxy resin is called a mold vacuum valve. Although not particularly illustrated, the mold part is normally grounded.

上述した真空バルブ１は、円筒絶縁材５の一端に接合された固定側端板６と、固定側端板６を気密に貫通する固定側導体７と、円筒絶縁材５の他端に接合された可動側端板８と、可動側端板８に一端が接合され、可動部の駆動を許容する蛇腹形状のベローズ９と、ベローズ９を気密に貫通し真空を維持しながら軸方向に駆動する可動側導体１０とから構成され、その内部圧力は、およそ１０−２Ｐａ以下の真空に保たれている。 The vacuum valve 1 described above is bonded to the fixed side end plate 6 bonded to one end of the cylindrical insulating material 5, the fixed side conductor 7 penetrating the fixed side end plate 6 in an airtight manner, and the other end of the cylindrical insulating material 5. One end is joined to the movable end plate 8, the bellows-shaped bellows 9 that allows the movable portion to be driven, and the bellows 9 is hermetically penetrated and driven in the axial direction while maintaining a vacuum. It is comprised from the movable side conductor 10, The internal pressure is kept at the vacuum of about 10 <-2 > Pa or less.

その真空バルブ１の内部には、円筒絶縁材５で支持された浮遊電位金属１１と、固定側導体７の端部に接続された固定側電極１２と、可動側導体１０の端部に接続された可動側電極１３とが配置されている。   Inside the vacuum valve 1, the floating potential metal 11 supported by the cylindrical insulating material 5, the fixed side electrode 12 connected to the end of the fixed side conductor 7, and the end of the movable side conductor 10 are connected. The movable side electrode 13 is disposed.

可動側導体１０は操作用絶縁ロッド１４に接続され、操作用絶縁ロッド１４は操作機構部４に収納され、電極対に接触荷重を加えるワイプ機構と連結された操作器に接続されている。操作用絶縁ロッド１４の周囲空間には、空気や六フッ化硫黄などの絶縁ガス１８が充填されている。   The movable conductor 10 is connected to an operation insulating rod 14, and the operation insulating rod 14 is housed in the operation mechanism unit 4 and connected to an operating device connected to a wipe mechanism that applies a contact load to the electrode pair. The space surrounding the operating insulating rod 14 is filled with an insulating gas 18 such as air or sulfur hexafluoride.

また、図示しない操作器の駆動に連動して操作用絶縁ロッド１４を介して可動側電極１３が駆動することで、固定側電極１２と可動側電極１３の接離、即ち、真空バルブ１の開状態と閉状態を切り替えることができる。なお、図１の真空バルブ１は、開状態を示している。   In addition, the movable side electrode 13 is driven through the operation insulating rod 14 in conjunction with the driving of the operating unit (not shown), so that the fixed side electrode 12 and the movable side electrode 13 are contacted and separated, that is, the vacuum valve 1 is opened. The state and the closed state can be switched. In addition, the vacuum valve 1 of FIG. 1 has shown the open state.

固定側ケーブルブッシング２は、固定側ケーブルブッシング導体１５を真空バルブ１の固定側導体７に電気的に接続して、また、可動側ケーブルブッシング３は、可動側ケーブルブッシング導体１６を真空バルブ１の可動側に配置して、真空バルブ１と一緒にエポキシ樹脂等の固体絶縁物により一体注型されており、真空バルブ１の可動側導体１０と可動側ケーブルブッシング導体１６は、摺動通電可能な接触子１７を介して電気的に接続され、固定側ケーブルブッシング２と可動側ケーブルブッシング３に、図示しない電源側ケーブルや負荷側ケーブルがそれぞれ接続されることで、運転できる構成となっている。   The fixed cable bushing 2 electrically connects the fixed cable bushing conductor 15 to the fixed conductor 7 of the vacuum valve 1, and the movable cable bushing 3 connects the movable cable bushing conductor 16 to the vacuum valve 1. The movable side conductor 10 and the movable side cable bushing conductor 16 of the vacuum valve 1 can be slidably energized by being placed on the movable side and integrally cast with a solid insulator such as epoxy resin together with the vacuum valve 1. It is electrically connected via a contact 17, and a power-side cable and a load-side cable (not shown) are connected to the fixed-side cable bushing 2 and the movable-side cable bushing 3, respectively, so that it can be operated.

そして、本実施例では、真空バルブ１と操作機構部４とがほぼ直線上に配置されていると共に、真空バルブ１の周囲のモールド部１Ａと操作機構部４とに跨り、両者を一体に固定する固定部材１９を有した構成となっている。   In this embodiment, the vacuum valve 1 and the operation mechanism unit 4 are arranged on a substantially straight line, and straddle the mold unit 1A and the operation mechanism unit 4 around the vacuum valve 1 so as to fix them together. It has the structure which has the fixing member 19 to do.

具体的には、固定部材１９の真空バルブ１側は、真空バルブ１のモールド部１Ａの側面の外部に突出して設けられたインサートナットを埋め込んだ複数のモールド張り出し部（モールド部１Ａと一体に成形されている）２０ａ、２０ｂに締結手段であるボルト２１ａ、２１ｂで固定され、固定部材１９の操作機構部４側は、操作機構部４の筐体に締結手段であるボルト２１ｃ、２１ｄで直接固定されている（操作機構部４には張り出し部がないが、あっても良い）。   Specifically, the vacuum valve 1 side of the fixing member 19 is formed integrally with a plurality of mold overhang portions (inserted with the mold portion 1A) in which insert nuts provided so as to protrude outside the side surface of the mold portion 1A of the vacuum valve 1 are embedded. 20a and 20b are fixed with bolts 21a and 21b as fastening means, and the operation mechanism section 4 side of the fixing member 19 is directly fixed to the casing of the operation mechanism section 4 with bolts 21c and 21d as fastening means. (The operating mechanism unit 4 does not have an overhanging portion, but may be provided).

このように構成される本実施例の真空遮断器３０Ａは、操作機構部４の駆動力、つまり、真空遮断器３０Ａの開閉動作で衝撃や振動による応力を固定部材１９でも受けることになり、応力を分散することができる。即ち、固定部材１９を介して真空バルブ１のモールド部１Ａと操作機構部４の筐体が複数個所でボルト２１ａ、２１ｂ、２１ｃ、２１ｄで固定されているので、真空遮断器３０Ａの開閉動作に伴う衝撃や振動による応力を各固定部分で分散できる。   The vacuum circuit breaker 30A of the present embodiment configured as described above is also subjected to the driving force of the operation mechanism unit 4, that is, the stress due to the impact or vibration by the opening / closing operation of the vacuum circuit breaker 30A. Can be dispersed. In other words, the mold part 1A of the vacuum valve 1 and the casing of the operation mechanism part 4 are fixed at a plurality of locations by the bolts 21a, 21b, 21c, and 21d through the fixing member 19, so that the vacuum circuit breaker 30A can be opened and closed. The stress caused by the impact and vibration can be distributed at each fixed part.

この結果、モールドされた真空バルブ１と操作機構部４を固定するボルト２１ａ、２１ｂ、２１ｃ、２１ｄやナットの緩みの発生を低減できると共に、操作機構部４の撓みを抑制することができ、モールドされた真空バルブ１またはモールドされた真空バルブ１を搭載した真空遮断器３０Ａを小型化でき、更に、真空遮断器３０Ａの開閉動作に対する信頼性を向上させることができる。   As a result, it is possible to reduce the occurrence of loosening of bolts 21a, 21b, 21c, 21d and nuts for fixing the molded vacuum valve 1 and the operation mechanism unit 4, and to suppress the bending of the operation mechanism unit 4, The vacuum circuit breaker 30A on which the vacuum valve 1 or the molded vacuum valve 1 is mounted can be reduced in size, and the reliability of the vacuum circuit breaker 30A for the opening / closing operation can be improved.

図２に、本発明の真空遮断器の実施例２を示す。なお、実施例１と同様な部分については説明を省略する。   FIG. 2 shows a second embodiment of the vacuum circuit breaker according to the present invention. Note that a description of the same parts as those in the first embodiment will be omitted.

該図に示す本実施例の真空遮断器３０Ｂは、固定部材１９が複数箇所で、真空バルブ１の周囲のモールド部１Ａと操作機構部４に跨る構成となっている。   The vacuum circuit breaker 30 </ b> B according to the present embodiment shown in the figure has a configuration in which the fixing member 19 extends over the mold part 1 </ b> A and the operation mechanism part 4 around the vacuum valve 1 at a plurality of positions.

即ち、固定部材１９は複数個配置され、それぞれの固定部材１９ａ、１９ｂが、真空バルブ１のモールド部１Ａと操作機構部４に跨り真空バルブ１のモールド部１Ａの側面に突出して設けられた複数のモールド張り出し部２０ａ、２０ｂと操作機構部４の筐体に締結手段であるボルト２１ａ、２１ｂ、２１ｃ、２１ｄで固定されている。他の構成は、実施例１と同様である。   That is, a plurality of fixing members 19 are arranged, and each of the fixing members 19a and 19b extends across the mold part 1A of the vacuum valve 1 and the operation mechanism part 4 and protrudes from the side surface of the mold part 1A of the vacuum valve 1. Are fixed to bolts 21a, 21b, 21c, and 21d, which are fastening means, to the casings of the mold overhanging portions 20a and 20b and the operation mechanism unit 4. Other configurations are the same as those of the first embodiment.

このように構成される本実施例の真空遮断器３０Ｂは、操作器の駆動力、即ち、真空遮断器３０Ｂの開閉動作で発生する衝撃や振動による応力を、２つの固定部材１９ａ、１９ｂで受けることになるため、１つの固定部材１９が受ける応力が実施例１よりも小さくすることができるため、モールドされた真空バルブ１と操作機構部４の筐体を固定するボルト２１ａ、２１ｂ、２１ｃ、２１ｄやナットの緩みの発生、或は操作機構部４の撓みを実施例１より抑制することができ、モールドされた真空バルブ１またはモールドされた真空バルブ１を搭載した真空遮断器３０Ｂの開閉動作に対する信頼性を更に向上させることができる。   The vacuum circuit breaker 30B of the present embodiment configured as described above receives the driving force of the operating device, that is, the stress caused by the impact and vibration generated by the opening / closing operation of the vacuum circuit breaker 30B, by the two fixing members 19a and 19b. Therefore, since the stress received by one fixing member 19 can be made smaller than that in the first embodiment, the bolts 21a, 21b, 21c for fixing the molded vacuum valve 1 and the housing of the operation mechanism unit 4 are fixed. The occurrence of 21d and nut loosening or the bending of the operation mechanism unit 4 can be suppressed from the first embodiment, and the opening / closing operation of the molded vacuum valve 1 or the vacuum circuit breaker 30B equipped with the molded vacuum valve 1 is implemented. The reliability with respect to can be further improved.

図３に、本発明の真空遮断器の実施例３を示す。なお、実施例１と同様な部分については説明を省略する。   FIG. 3 shows a third embodiment of the vacuum circuit breaker according to the present invention. Note that a description of the same parts as those in the first embodiment will be omitted.

該図に示す本実施例の真空遮断器３０Ｃは、固定部材１９を、操作機構部４とは反対側に位置する固定側ケーブルブッシング２の側面にも配置したものである。   In the vacuum circuit breaker 30 </ b> C of the present embodiment shown in the figure, the fixing member 19 is also arranged on the side surface of the fixed side cable bushing 2 located on the opposite side to the operation mechanism unit 4.

即ち、固定部材１９は軸方向に伸延しており、かつ、固定側ケーブルブッシング２を越えた位置で内側に略９０度折れ曲がり、この折れ曲がった固定部材１９´が、固定側ケーブルブッシング２の周囲を覆うモールド部に設けたインサートナットを埋め込んだモールド張り出し部２０ｃに締結手段であるボルト２１ｅで固定されている。他の構成は、実施例１と同様である。   That is, the fixing member 19 extends in the axial direction and bends approximately 90 degrees inward at a position beyond the fixed-side cable bushing 2, and the bent fixing member 19 ′ surrounds the fixed-side cable bushing 2. It is fixed to a mold overhanging portion 20c in which an insert nut provided in the covering mold portion is embedded with a bolt 21e as a fastening means. Other configurations are the same as those of the first embodiment.

なお、固定部材１９は軸方向に伸延して固定側ケーブルブッシング２と交差しているが、これは固定側ケーブルブッシング２に固定部材１９が貫通できる貫通孔を設けることで可能である。また、固定部材１９は固定側ケーブルブッシング２と交差せず、固定側ケーブルブッシング２を避けて配置することも可能である。   The fixing member 19 extends in the axial direction and intersects the fixed-side cable bushing 2. This can be achieved by providing a through-hole through which the fixing member 19 can pass through the fixed-side cable bushing 2. Further, the fixing member 19 does not intersect with the fixed cable bushing 2 and can be arranged avoiding the fixed cable bushing 2.

このように構成される本実施例の真空遮断器３０Ｃは、操作器の駆動力、即ち、真空遮断器３０Ｃの開閉動作で発生する衝撃や振動による応力を、折れ曲がった固定部材１９´があることで実施例１よりも分散することができるため、モールドされた真空バルブ１と操作機構部４の筐体を固定するボルトボルト２１ａ、２１ｂ、２１ｃ、２１ｄ、２１ｅやナットの緩みの発生、或は操作機構部４の撓みを実施例１より抑制することができ、モールドされた真空バルブ１、またはモールドされた真空バルブ１を搭載した真空遮断器３０Ｃの開閉動作に対する信頼性を更に向上することができる。   The vacuum circuit breaker 30C of the present embodiment configured as described above has a fixing member 19 'that is bent with respect to the driving force of the operating device, that is, the stress caused by the impact or vibration generated by the opening / closing operation of the vacuum circuit breaker 30C. Therefore, the bolt bolts 21a, 21b, 21c, 21d, 21e for fixing the molded vacuum valve 1 and the casing of the operation mechanism unit 4 and the occurrence of loosening of nuts, or The bending of the operation mechanism unit 4 can be suppressed as compared with the first embodiment, and the reliability of the molded vacuum valve 1 or the opening / closing operation of the vacuum circuit breaker 30C equipped with the molded vacuum valve 1 can be further improved. it can.

なお、本実施例では固定部材１９が１つの場合を示したが、固定部材１９を複数設けた場合は、更に効果が顕著になることは明らかである。   In the present embodiment, the case where the number of the fixing members 19 is one is shown. However, when a plurality of the fixing members 19 are provided, it is obvious that the effect becomes more remarkable.

図４に、本発明の真空遮断器の実施例４を示す。なお、実施例１と同様な部分については説明を省略する。   FIG. 4 shows a fourth embodiment of the vacuum circuit breaker according to the present invention. Note that a description of the same parts as those in the first embodiment will be omitted.

該図に示す本実施例の真空遮断器３０Ｄは、実施例１と同様に、固定部材１９の真空バルブ１側がモールド張り出し部にボルトで固定され、固定部材１９の操作機構部４側は、操作機構部４の筐体に締結手段であるボルト２１ｃ、２１ｄで直接固定されているが、本実施例では、浮遊電位金属１１の周囲に位置するモールド張り出し部で固定部材１９を固定するボルト２１ａは、真空バルブ１内の圧力（真空度）を検査する検査用ボルト２２であり、この検査用ボルト２２と、検査用ボルト２２と対になる検査用インサートナット２３とが浮遊電位金属１１と所定距離だけ離間した位置で固定部材１９を固定し、検査用ボルト２２と検査用インサートナット２３は、固定部材１９とは絶縁部材２４を介して電気的に絶縁されている。   In the vacuum circuit breaker 30D of the present embodiment shown in the figure, as in the first embodiment, the vacuum valve 1 side of the fixing member 19 is fixed to the mold overhanging portion with bolts, and the operation mechanism portion 4 side of the fixing member 19 is operated Although it is directly fixed to the casing of the mechanism portion 4 by bolts 21c and 21d as fastening means, in this embodiment, the bolt 21a for fixing the fixing member 19 at the mold overhanging portion located around the floating potential metal 11 is The inspection bolt 22 for inspecting the pressure (vacuum degree) in the vacuum valve 1, and the inspection bolt 22 and the inspection insert nut 23 paired with the inspection bolt 22 are separated from the floating potential metal 11 by a predetermined distance. The fixing member 19 is fixed at a position separated from the fixing bolt 19, and the inspection bolt 22 and the inspection insert nut 23 are electrically insulated from the fixing member 19 via an insulating member 24.

また、検査用ボルト２２には、真空バルブ１の圧力が上昇した際の浮遊電位金属１１の電位上昇を検出する圧力監視装置２５が接続され、この圧力監視装置２５で検出した検出信号から真空バルブ１の内部圧力の異常の有無を判定する判定装置２６を備えている。   The inspection bolt 22 is connected to a pressure monitoring device 25 that detects an increase in the potential of the floating potential metal 11 when the pressure of the vacuum valve 1 increases, and the vacuum valve is detected from the detection signal detected by the pressure monitoring device 25. 1 is provided with a determination device 26 for determining the presence or absence of abnormality in the internal pressure.

上記した前記圧力監視装置２５は、検査用ボルト２２と検査用インサートナット２３の少なくとも一方に接続されている接続線２５ａと、この接続線２５ａを介して検査用ボルト２２と検査用インサートナット２３の少なくとも一方に部分的に直列に接続された複数の絶縁物（例えば、コンデンサ）２５ｂ１、２５ｂ２と、複数の絶縁物２５ｂ１、２５ｂ２間に接続されている電位測定器２５ｃとから成り、部分的に直列に接続された複数の前記絶縁物２５ｂ１、２５ｂ２のうち、検査用ボルト２２と検査用インサートナット２３とは近い側に位置する１つの絶縁物２５ｂ１とは異なる絶縁物２５ｂ２が電位固定点（アース）２５ｄに接続されている。   The pressure monitoring device 25 described above includes a connection line 25a connected to at least one of the inspection bolt 22 and the inspection insert nut 23, and the inspection bolt 22 and the inspection insert nut 23 via the connection line 25a. It consists of a plurality of insulators (for example, capacitors) 25b1 and 25b2 partially connected in series to at least one, and a potential measuring device 25c connected between the plurality of insulators 25b1 and 25b2. Among the plurality of insulators 25b1 and 25b2 connected to each other, an insulator 25b2 different from one insulator 25b1 located on the side closer to the inspection bolt 22 and the inspection insert nut 23 is a potential fixing point (ground). 25d.

このように構成される本実施例の真空遮断器３０Ｄは、真空バルブ１に圧力劣化が生じた場合に検査用ボルト２２に電位が発生するため、検査用ボルト２２に圧力監視装置２５が接続されていることで真空バルブ１の内部圧力の異常有無を監視することができる。   In the vacuum circuit breaker 30D of the present embodiment configured as described above, a potential is generated in the inspection bolt 22 when pressure deterioration occurs in the vacuum valve 1, and therefore the pressure monitoring device 25 is connected to the inspection bolt 22. Therefore, it is possible to monitor whether the internal pressure of the vacuum valve 1 is abnormal.

ここで、真空バルブ１の圧力劣化、即ち、真空容器内部の圧力が上昇した場合について説明する。   Here, the pressure deterioration of the vacuum valve 1, that is, the case where the pressure inside the vacuum vessel increases will be described.

真空容器の内部の圧力上昇は、一般的に真空容器外部からのガス透過、真空容器の内部部材からのガス放出、ベローズ９や接合部などに稀に発生するピンホールなどが主要因で発生し、図５の真空容器内の圧力と放電開始電圧の関係を表すパッシェンカーブに示されるように、およそ１０−１Ｐａ以上になると絶縁性能が急激に低下し始める。 The pressure rise inside the vacuum vessel is mainly caused by gas permeation from the outside of the vacuum vessel, gas release from the internal member of the vacuum vessel, pinholes that rarely occur at the bellows 9 or joints, etc. as shown in the Paschen curve that represents the relationship between pressure and discharge start voltage in the vacuum chamber of Figure 5, and becomes more about 10 -1 Pa insulation performance begins to rapidly decrease.

真空バルブ１を搭載した真空遮断器３０Ｄが通常運転状態にあるときに、真空バルブ１に圧力上昇が生じて絶縁性能が低下すると、固定側導体７、固定側電極１２、可動側導体１０、可動側電極１３から成る主回路と、この主回路とは電気的に絶縁されている浮遊電位金属１１の間で放電が発生する。   When the vacuum circuit breaker 30D equipped with the vacuum valve 1 is in a normal operation state, if the pressure rises in the vacuum valve 1 and the insulation performance deteriorates, the fixed conductor 7, the fixed electrode 12, the movable conductor 10, the movable Discharge occurs between the main circuit composed of the side electrodes 13 and the floating potential metal 11 that is electrically insulated from the main circuit.

真空バルブ１に圧力上昇が発生しない通常運転時の浮遊電位金属１１の電位は、運転電圧と、真空バルブ１の構造と、真空バルブ１の周囲の固定電位部材（例えば、車両の筐体或いは床面）の配置などによりおよそ決定されるが、圧力上昇が発生して真空バルブ１の主回路と浮遊電位金属１１の間で放電が発生したときの浮遊電位金属１１の電位は、通常運転時の電位に放電パルスが重畳された電位となる。更に、圧力が上昇すると増加した放電パルスが重畳され、最終的に浮遊電位金属１１の電位は運転電圧に程近い状態まで上昇する。   The potential of the floating potential metal 11 during normal operation in which no pressure increase occurs in the vacuum valve 1 includes the operating voltage, the structure of the vacuum valve 1, and a fixed potential member around the vacuum valve 1 (for example, a vehicle casing or floor). The potential of the floating potential metal 11 when a pressure increase occurs and a discharge occurs between the main circuit of the vacuum valve 1 and the floating potential metal 11 is determined during normal operation. It becomes a potential in which a discharge pulse is superimposed on the potential. Further, when the pressure rises, an increased discharge pulse is superimposed, and finally the potential of the floating potential metal 11 rises to a state close to the operating voltage.

上記、圧力が上昇した際の浮遊電位金属１１の電位上昇を、検査用ボルト２２に接続した圧力監視装置２５で検出し、その検出信号を外部の判定装置２６に出力することで真空バルブ１の内部圧力の健全性（異常の有無）を把握することができる。   The potential increase of the floating potential metal 11 when the pressure increases is detected by the pressure monitoring device 25 connected to the inspection bolt 22, and the detection signal is output to the external determination device 26, whereby the vacuum valve 1. It is possible to grasp the soundness of internal pressure (presence / absence of abnormality).

このような本実施例の真空遮断器３０Ｄによれば、実施例１と同様の効果を得ることができるだけでなく、真空バルブ１の内部圧力を監視することができるため、真空バルブ１の絶縁信頼性の向上、即ち、真空遮断器３０Ｄの信頼性を向上することができる。   According to such a vacuum circuit breaker 30D of the present embodiment, not only can the same effect as that of the first embodiment be obtained, but also the internal pressure of the vacuum valve 1 can be monitored. The improvement of the property, that is, the reliability of the vacuum circuit breaker 30D can be improved.

図６に、本発明の真空遮断器の実施例５を示す。なお、実施例４と同様な部分については、説明を省略する。   FIG. 6 shows a fifth embodiment of the vacuum circuit breaker according to the present invention. Note that a description of the same parts as those in the fourth embodiment will be omitted.

該図に示す本実施例の真空遮断器３０Ｅは、固定部材１９が２箇所に配置され、この固定部材１９が真空バルブ１の周囲のモールド部１Ａと操作機構部４に跨る構成となっており、固定部材１９は、実施例４と同様に真空バルブ１の周囲のモールド部１Ａと操作機構部４の筐体に固定されているが、周方向に複数個（本実施例では２個）配置されている検査用ボルト２２ａ、２２ｂと対になる検査用インサートナット２３ａ、２３ｂは、浮遊電位金属１１と所定距離だけ離間した位置に固定され、検査用ボルト２２ａ、２２ｂと検査用インサートナット２３ａ、２３ｂは、固定部材１９とは絶縁部材２４で電気的に絶縁されている。   In the vacuum circuit breaker 30E of this embodiment shown in the figure, the fixing members 19 are arranged at two locations, and the fixing members 19 straddle the mold part 1A and the operation mechanism part 4 around the vacuum valve 1. The fixing member 19 is fixed to the casing of the mold part 1A around the vacuum valve 1 and the operation mechanism part 4 as in the fourth embodiment, but a plurality of fixing members 19 (two in this embodiment) are arranged in the circumferential direction. The inspection insert nuts 23a, 23b that are paired with the inspection bolts 22a, 22b are fixed at positions spaced apart from the floating potential metal 11 by a predetermined distance, and the inspection bolts 22a, 22b and the inspection insert nuts 23a, 23 b is electrically insulated from the fixing member 19 by an insulating member 24.

また、本実施例では、全長が異なる検査用インサートナット２３ａ、２３ｂを、モールドの張り出し部２０ａにそれぞれ埋め込んである。   In the present embodiment, the inspection insert nuts 23a and 23b having different overall lengths are embedded in the overhang portion 20a of the mold.

このように構成される本実施例の真空遮断器３０Ｅは、実施例１と同様な効果を得ることができることは勿論、真空バルブ１の浮遊電位金属１１と検査用インサートナット２３ａ、２３ｂ間の距離が異なる、つまり、図６のＬ１とＬ２の距離が異なるため、検査用ボルト２２ａ、２２ｂに発生する電位を変えることができる。   The vacuum circuit breaker 30E of the present embodiment configured as described above can obtain the same effect as that of the first embodiment, and of course, the distance between the floating potential metal 11 of the vacuum valve 1 and the insert nuts 23a and 23b for inspection. Since the distances L1 and L2 in FIG. 6 are different, the potentials generated in the inspection bolts 22a and 22b can be changed.

図６において、上側の検査用インサートナット２３ａは、下側の検査用インサートナット２３ｂに比べ、真空バルブ１の浮遊電位金属１１との距離が短い構成になっているが、真空バルブ１の内部圧力が上昇すると、先ず上側の検査用インサートナット２３ａの電位が上昇する。更に、真空バルブ１の内部圧力が上昇すると、下側の検査用インサートナット２３ｂの電位が上昇する。圧力と検査用インサートナット２３ａ、２３ｂの電位上昇の関係を事前に把握しておけば、簡易的な圧力計となり、真空バルブ１の内部圧力がどの程度劣化しているかを把握することができる。   6, the upper inspection insert nut 23a has a shorter distance from the floating potential metal 11 of the vacuum valve 1 than the lower inspection insert nut 23b. Rises, the potential of the upper inspection insert nut 23a first rises. Further, when the internal pressure of the vacuum valve 1 increases, the potential of the lower inspection insert nut 23b increases. If the relationship between the pressure and the potential increase of the insert nuts 23a and 23b for inspection is grasped in advance, it becomes a simple pressure gauge, and it is possible to grasp how much the internal pressure of the vacuum valve 1 has deteriorated.

なお、本実施例では２つの検査用ボルト２２ａ、２２ｂを示しているが、周方向に複数あれば、その分圧力測定の精度を向上することができる。   In the present embodiment, two inspection bolts 22a and 22b are shown. However, if there are a plurality of inspection bolts 22a and 22b in the circumferential direction, the accuracy of pressure measurement can be improved by that amount.

図７に、本発明の真空遮断器の実施例６を示す。なお、実施例１及び実施例４と同様な部分については、説明を省略する。   FIG. 7 shows a sixth embodiment of the vacuum circuit breaker according to the present invention. Note that the description of the same parts as those in the first and fourth embodiments is omitted.

該図に示す本実施例の真空遮断器３０Ｆは、１つの検査用ボルト２２ａ１（又は２２ａ２、２２ａ３）と対になる１つの検査用インサートナット２３ａ１（又は２３ａ２、２３ａ３）の組が、真空バルブ１の周囲のモールド部１Ａで、かつ、浮遊電位金属１１の軸方向に複数個（本実施例では３個）配置され、この浮遊電位金属１１の軸方向に配置された３個の各々の検査用インサートナット２３ａ１、２３ａ２、２３ａ３は、それぞれ浮遊電位金属１１との距離が異なるように配置されている。   In the vacuum circuit breaker 30F of this embodiment shown in the figure, a set of one inspection insert nut 23a1 (or 23a2, 23a3) paired with one inspection bolt 22a1 (or 22a2, 22a3) is a vacuum valve 1. A plurality (three in this embodiment) of the floating potential metal 11 are arranged in the axial direction of the floating potential metal 11, and each of the three arranged for the inspection in the axial direction of the floating potential metal 11 The insert nuts 23a1, 23a2, and 23a3 are arranged so that the distance from the floating potential metal 11 is different.

具体的には、固定部材１９が真空バルブ１の周囲のモールド部１Ａと操作機構部４に跨る構成となっており、固定部材１９は、真空バルブ１の周囲のモールド部１Ａと操作機構部４の筐体に固定されているが、この際に、浮遊電位金属１１の周囲に位置する固定部材１９は、真空バルブ１のモールド部１Ａに、検査用ボルト２２ａ１、２２ａ２、２２ａ３と、この検査用ボルト２２ａ１、２２ａ２、２２ａ３と対になる検査用インサートナット２３ａ１、２３ａ２、２３ａ３により、それぞれの検査用インサートナット２３ａ１、２３ａ２、２３ａ３が浮遊電位金属１１との距離が異なるように３箇所で固定されている。   Specifically, the fixing member 19 is configured to straddle the mold part 1A and the operation mechanism part 4 around the vacuum valve 1, and the fixing member 19 includes the mold part 1A and the operation mechanism part 4 around the vacuum valve 1. At this time, the fixing member 19 positioned around the floating potential metal 11 is connected to the mold portion 1A of the vacuum valve 1 with the inspection bolts 22a1, 22a2, 22a3 and the inspection member. The inspection insert nuts 23a1, 23a2, 23a3 paired with the bolts 22a1, 22a2, 22a3 are fixed at three locations so that the distance between the inspection insert nuts 23a1, 23a2, 23a3 and the floating potential metal 11 is different. Yes.

それぞれの検査用ボルト２２ａ１、２２ａ２、２２ａ３と検査用インサートナット２３ａ１、２３ａ２、２３ａ３は、固定部材１９とは絶縁部材２４で電気的に絶縁されている。   Each of the inspection bolts 22a1, 22a2, 22a3 and the inspection insert nuts 23a1, 23a2, 23a3 are electrically insulated from the fixing member 19 by an insulating member 24.

また、本実施例では、全長が異なる検査用インサートナット２３ａ１、２３ａ２、２３ａ３を、真空バルブ１の周囲のモールド部１Ａの張り出し部２０ａ１、２０ａ２、２０ａ３にそれぞれ埋め込んである。   In this embodiment, the inspection insert nuts 23a1, 23a2, and 23a3 having different overall lengths are embedded in the overhang portions 20a1, 20a2, and 20a3 of the mold portion 1A around the vacuum valve 1, respectively.

このように構成される本実施例の真空遮断器３０Ｆは、実施例１と同様な効果を得ることができることは勿論、真空バルブ１の浮遊電位金属１１と各々の検査用インサートナット２３ａ１、２３ａ２、２３ａ３間の距離が異なるため、検査用ボルト２２ａ１、２２ａ２、２２ａ３に発生する電位を変えることができる。   The vacuum circuit breaker 30F of the present embodiment configured as described above can obtain the same effect as that of the first embodiment, and of course, the floating potential metal 11 of the vacuum valve 1 and each of the inspection insert nuts 23a1, 23a2, Since the distance between 23a3 is different, the potential generated in the inspection bolts 22a1, 22a2, 22a3 can be changed.

例えば、図７において、左側の検査用インサートナット２３ａ１は、真空バルブ１の浮遊電位金属１１との距離が最も短く、次いで中央の検査用インサートナット２３ａ２、右側の検査用インサートナット２３ａ３とその距離が長くなる。真空バルブ１の内部圧力が上昇すると、先ず左側の検査用インサートナット２３ａ１の電位が上昇し、更に、真空バルブ１の内部圧力が上昇すると、中央の検査用インサートナット２３ａ２、そして、右側の検査用インサートナット２３ａ３の電位が上昇する。圧力と検査用インサートナット２３ａ１、２３ａ２、２３ａ３の電位上昇の関係を事前に把握しておけば、簡易的な圧力計となり、真空バルブ１の内部圧力がどの程度劣化しているかを把握することができる。   For example, in FIG. 7, the left inspection insert nut 23a1 has the shortest distance from the floating potential metal 11 of the vacuum valve 1, and then the center inspection insert nut 23a2 and the right inspection insert nut 23a3 become longer. When the internal pressure of the vacuum valve 1 rises, the potential of the left inspection insert nut 23a1 first rises. When the internal pressure of the vacuum valve 1 rises further, the central inspection insert nut 23a2 and the right inspection nut 23a1 The potential of the insert nut 23a3 increases. If the relationship between the pressure and the potential increase of the insert nuts 23a1, 23a2, and 23a3 for inspection is known in advance, it becomes a simple pressure gauge, and it is possible to grasp how much the internal pressure of the vacuum valve 1 has deteriorated. it can.

なお、本実施例では、３つの検査用ボルト２２ａ１、２２ａ２、２２ａ３を示しているが、軸方向に更に追加すれば、圧力測定の精度を向上することができる。   In the present embodiment, three inspection bolts 22a1, 22a2, and 22a3 are shown. However, if further added in the axial direction, the accuracy of pressure measurement can be improved.

なお、上記した実施例は本発明を分かり易く説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成を置き換えることが可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成の一部について、他の構成の追加・削除・置換をすることが可能である。   The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

１…真空バルブ、１Ａ…真空バルブのモールド部、２…固定側ケーブルブッシング、３…可動側ケーブルブッシング、４…操作機構部、５…円筒絶縁材、６…固定側端板、７…固定側導体、８…可動側端板、９…ベローズ、１０…可動側導体、１１…浮遊電位金属、１２…固定側電極、１３…可動側電極、１４…操作用絶縁ロッド、１５…固定側ケーブルブッシング導体、１６…可動側ケーブルブッシング導体、１７…接触子、１８…絶縁ガス、１９、１９ａ、１９ｂ…固定部材、１９´…折れ曲がった固定部材、２０ａ、２０ｂ、２０ｃ、２０ａ１、２０ａ２、２０ａ３…モールド張り出し部、２１ａ、２１ｂ、２１ｃ、２１ｄ、２１ｅ…ボルト、２２、２２ａ、２２ｂ、２２ａ１、２２ａ２、２２ａ３…検査用ボルト、２３、２３ａ、２３ｂ、２３ａ１、２３ａ２、２３ａ３…検査用インサートナット、２４…絶縁部材、２５…圧力監視装置、２５ａ…接続線、２５ｂ１、２５ｂ２…絶縁物、２５ｃ…電位測定器、２５ｄ…電位固定点、２６…判定装置、３０Ａ、３０Ｂ、３０Ｃ、３０Ｄ、３０Ｅ、３０Ｆ…真空遮断器。   DESCRIPTION OF SYMBOLS 1 ... Vacuum valve, 1A ... Mold part of vacuum valve, 2 ... Fixed side cable bushing, 3 ... Movable side cable bushing, 4 ... Operation mechanism part, 5 ... Cylindrical insulating material, 6 ... Fixed side end plate, 7 ... Fixed side Conductor, 8 ... movable side end plate, 9 ... bellows, 10 ... movable side conductor, 11 ... floating potential metal, 12 ... fixed side electrode, 13 ... movable side electrode, 14 ... insulating rod for operation, 15 ... fixed side cable bushing Conductor, 16 ... movable cable bushing conductor, 17 ... contact, 18 ... insulating gas, 19, 19a, 19b ... fixing member, 19 '... bent fixing member, 20a, 20b, 20c, 20a1, 20a2, 20a3 ... mold Overhang, 21a, 21b, 21c, 21d, 21e ... bolts, 22, 22a, 22b, 22a1, 22a2, 22a3 ... inspection bolts, 23, 23a, 2 b, 23a1, 23a2, 23a3 ... Insert nut for inspection, 24 ... insulating member, 25 ... pressure monitoring device, 25a ... connection line, 25b1, 25b2 ... insulator, 25c ... potential measuring device, 25d ... potential fixing point, 26 ... Determination device, 30A, 30B, 30C, 30D, 30E, 30F ... Vacuum circuit breaker.

Claims (11)

少なくとも固定側電極及び可動側電極が格納され、周囲がモールド部で覆われている真空バルブと、前記可動側電極を駆動する操作機構部とを備えた真空遮断器であって、
前記真空バルブと前記操作機構部が直線上に配置されていると共に、前記真空バルブのモールド部と前記操作機構部に跨り両者を固定する固定部材を備えていることを特徴とする真空遮断器。 A vacuum circuit breaker comprising: a vacuum valve in which at least a fixed side electrode and a movable side electrode are housed, and the periphery thereof is covered with a mold part;
A vacuum circuit breaker characterized in that the vacuum valve and the operation mechanism part are arranged on a straight line, and a fixing member is provided to fix the vacuum valve and the operation mechanism part across the mold part and the operation mechanism part. 請求項１に記載の真空遮断器において、
前記固定部材は、前記真空バルブのモールド部の側面に突出して設けられた複数のモールド張り出し部と前記操作機構部に締結手段で固定されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 1,
The vacuum circuit breaker, wherein the fixing member is fixed to a plurality of mold projecting portions provided on the side surfaces of the mold portion of the vacuum valve and the operation mechanism portion by fastening means. 請求項２に記載の真空遮断器において、
前記真空バルブは、円筒絶縁材の一端に接合された固定側端板と、該固定側端板を気密に貫通する固定側導体と、前記円筒絶縁材の他端に接合された可動側端板と、該可動側端板に一端が接合され、可動部の駆動を許容するベローズと、該ベローズを気密に貫通し真空を維持しながら軸方向に駆動する可動側導体とから構成され、
前記真空バルブの内部には、前記円筒絶縁材で支持された浮遊電位金属と、前記固定側導体の端部に接続された前記固定側電極と、前記可動側導体の端部に接続された前記可動側電極とが配置されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 2,
The vacuum valve includes a fixed-side end plate joined to one end of a cylindrical insulating material, a fixed-side conductor that hermetically passes through the fixed-side end plate, and a movable-side end plate joined to the other end of the cylindrical insulating material. And a bellows having one end joined to the movable side end plate and permitting the drive of the movable part, and a movable side conductor that penetrates the bellows in an airtight manner and drives in the axial direction while maintaining a vacuum,
Inside the vacuum valve, the floating potential metal supported by the cylindrical insulating material, the fixed side electrode connected to the end of the fixed side conductor, and the end connected to the end of the movable side conductor A vacuum circuit breaker characterized in that a movable electrode is disposed. 請求項３に記載の真空遮断器において、
前記固定側導体に電気的に接続された固定側ケーブルブッシングと前記可動側導体に電気的に接続された可動側ケーブルブッシングを備え、
前記固定部材は、前記操作機構部とは反対側に位置する前記固定側ケーブルブッシングの側面にも配置されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 3,
A fixed-side cable bushing electrically connected to the fixed-side conductor and a movable-side cable bushing electrically connected to the movable-side conductor;
The vacuum breaker, wherein the fixing member is also disposed on a side surface of the fixed-side cable bushing located on the opposite side to the operation mechanism portion. 請求項４に記載の真空遮断器において、
前記固定部材は軸方向に伸延し、かつ、前記固定側ケーブルブッシングを越えた位置で内側に折れ曲がり、この折れ曲がった前記固定部材が、前記固定側ケーブルブッシングのモールド部に設けたモールド張り出し部に締結手段で固定されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 4,
The fixing member extends in the axial direction and bends inward at a position beyond the fixed-side cable bushing. A vacuum circuit breaker fixed by means. 請求項３に記載の真空遮断器において、
前記浮遊電位金属の周囲に位置する前記モールド張り出し部で前記固定部材を固定する前記締結手段は検査用ボルトであり、この検査用ボルトと、該検査用ボルトと対になる検査用インサートナットとが前記浮遊電位金属と所定距離だけ離間した位置で前記固定部材を固定し、前記検査用ボルトと前記検査用インサートナットは、前記固定部材とは絶縁部材を介して電気的に絶縁されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 3,
The fastening means for fixing the fixing member at the mold projecting portion located around the floating potential metal is an inspection bolt, and the inspection bolt and an inspection insert nut paired with the inspection bolt are provided. The fixing member is fixed at a position separated from the floating potential metal by a predetermined distance, and the inspection bolt and the inspection insert nut are electrically insulated from the fixing member via an insulating member. A featured vacuum circuit breaker. 請求項６に記載の真空遮断器において、
前記検査用ボルトに、前記真空バルブの圧力が上昇した際の前記浮遊電位金属の電位上昇を検出する圧力監視装置が接続され、前記圧力監視装置で検出した検出信号から前記真空バルブの内部圧力の異常の有無を判定する判定装置を備えていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 6,
A pressure monitoring device that detects an increase in potential of the floating potential metal when the pressure of the vacuum valve increases is connected to the inspection bolt, and an internal pressure of the vacuum valve is detected from a detection signal detected by the pressure monitoring device. A vacuum circuit breaker comprising a determination device for determining presence or absence of abnormality. 請求項７に記載の真空遮断器において、
前記圧力監視装置は、前記検査用ボルトと前記検査用インサートナットの少なくとも一方に接続されている接続線と、該接続線を介して前記検査用ボルトと前記検査用インサートナットの少なくとも一方に部分的に直列に接続された複数の絶縁物と、複数の前記絶縁物間に接続されている電位測定器とから成り、部分的に直列に接続された複数の前記絶縁物のうち、前記検査用ボルトと前記検査用インサートナットとは近い側に位置する１つの前記絶縁物とは異なる絶縁物が電位固定点に接続されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 7,
The pressure monitoring device is partially connected to at least one of the inspection bolt and the inspection insert nut via the connection line connected to at least one of the inspection bolt and the inspection insert nut. A plurality of insulators connected in series to each other, and a potential measuring instrument connected between the plurality of insulators, and among the plurality of insulators partially connected in series, the inspection bolt A vacuum circuit breaker characterized in that an insulator different from the one insulator located on the side closer to the inspection insert nut is connected to the potential fixing point. 請求項６に記載の真空遮断器において、
前記検査用ボルトと前記検査用インサートナットは、前記浮遊電位金属の周方向若しくは軸方向に複数個配置されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 6,
A plurality of the inspection bolts and the inspection insert nuts are arranged in a circumferential direction or an axial direction of the floating potential metal. 請求項９に記載の真空遮断器において、
前記浮遊電位金属の周方向若しくは軸方向に配置された複数個の各々の前記検査用インサートナットは、それぞれ前記浮遊電位金属との距離が異なるように配置されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 9,
The vacuum circuit breaker characterized in that each of the plurality of inspection insert nuts arranged in the circumferential direction or the axial direction of the floating potential metal is arranged so as to have a different distance from the floating potential metal. . 請求項１に記載の真空遮断器において、
前記固定部材は複数個配置され、それぞれの前記固定部材が、前記真空バルブのモールド部と前記操作機構部に跨り前記真空バルブのモールド部の側面に突出して設けられた複数のモールド張り出し部と前記操作機構部に締結手段で固定されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 1,
A plurality of the fixing members are arranged, each of the fixing members straddling the mold part of the vacuum valve and the operation mechanism part, and a plurality of mold projecting parts provided protruding from the side surfaces of the mold part of the vacuum valve, A vacuum circuit breaker characterized in that the vacuum circuit breaker is fixed to the operation mechanism portion by fastening means.
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