JP2010010008A - Vacuum switchgear - Google Patents

Vacuum switchgear Download PDF

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Publication number
JP2010010008A
JP2010010008A JP2008169775A JP2008169775A JP2010010008A JP 2010010008 A JP2010010008 A JP 2010010008A JP 2008169775 A JP2008169775 A JP 2008169775A JP 2008169775 A JP2008169775 A JP 2008169775A JP 2010010008 A JP2010010008 A JP 2010010008A
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Prior art keywords
end plate
electrode side
side end
movable electrode
insulating
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JP2008169775A
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JP2010010008A5 (en
JP4729600B2 (en
Inventor
Miki Yamazaki
美稀 山崎
Masahito Kobayashi
将人 小林
Hiroyuki Ozawa
裕之 小澤
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Hitachi Ltd
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Hitachi Ltd
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Priority to JP2008169775A priority Critical patent/JP4729600B2/en
Priority to TW098120085A priority patent/TWI416568B/en
Priority to SG200904413-2A priority patent/SG158058A1/en
Priority to CN2009101509732A priority patent/CN101620948B/en
Priority to KR1020090058178A priority patent/KR101231639B1/en
Priority to US12/494,674 priority patent/US8227720B2/en
Priority to DE602009001105T priority patent/DE602009001105D1/en
Priority to AT09008572T priority patent/ATE506684T1/en
Priority to EP09008572A priority patent/EP2141720B1/en
Publication of JP2010010008A publication Critical patent/JP2010010008A/en
Publication of JP2010010008A5 publication Critical patent/JP2010010008A5/ja
Priority to HK10104028.6A priority patent/HK1138104A1/en
Application granted granted Critical
Publication of JP4729600B2 publication Critical patent/JP4729600B2/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
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/66215—Details relating to the soldering or brazing of vacuum switch housings

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

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a vacuum switchgear with an easily molding configuration capable of reducing electric field inside an insulating envelope and a vacuum vessel, and at the same time preventing cracks due to thermal stress and the like caused at the joining portion of an insulating tube. <P>SOLUTION: A fixed electrode lead is disposed in the position opposite to a movable electrode lead inside a vacuum vessel configured with the insulating tube, a fixed electrode and a movable electrode are mounted in each of inner ends of their leads, and both ends of the insulating tube are fitted with the endplates of the fixed and movable electrodes to hermetically seal both ends of the insulating tube. Further, a central shield is provided inside the insulating tube to surround both electrodes for preventing pollution inside the inner peripheral surface of the insulating tube; and an inner-end and an outer-end shields are formed inside and outside the vacuum vessel concentrically with the inner-end and the outer-end shields to cover the joining portion, so as to reduce the electric field in the joining portion between the insulating tube and each of the electrode endplates. The vacuum vessel is formed with the configuration as mentioned above. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、真空スイッチギヤに関するものである。   The present invention relates to a vacuum switchgear.

従来この種真空スイッチギヤにおいては、固定電極側端板と動電極側端板と絶縁筒と両端面の接着面積が大きいと、互いの線膨張係数の相違によりクラックが発生する恐れがある。   Conventionally, in this type of vacuum switch gear, if the adhesion area of the fixed electrode side end plate, the moving electrode side end plate, the insulating cylinder, and both end faces is large, cracks may occur due to the difference in linear expansion coefficient.

しかしながら、従来技術では絶縁筒の接着部に生じる熱応力や線膨張係数の相違等によるクラックの発生防止については配慮されていなかった。   However, in the prior art, no consideration has been given to the prevention of cracks due to differences in thermal stress, linear expansion coefficient, etc. generated in the bonded portion of the insulating cylinder.

特開２００１−３３８５５７号公報JP 2001-338557 A

上記特許文献１の真空スイッチギヤは、絶縁筒の接着部の端部を覆うように金属製の椀状のシールドを設けることによって、電界緩和の効果が期待できる。   The vacuum switchgear of the above-mentioned patent document 1 can be expected to have an electric field relaxation effect by providing a metal bowl-shaped shield so as to cover the end of the bonded portion of the insulating cylinder.

しかしながら固定電極側端板、可動電極側端板と絶縁筒の両端面の接着面積が大きい場合、互いの線膨張係数の相違によりクラックが発生する恐れがある。また、同様にエポキシ樹脂等の絶縁外皮と絶縁筒の線膨張係数の相違による絶縁外皮にクラックが発生する恐れがある。   However, when the adhesion area of the fixed electrode side end plate, the movable electrode side end plate, and both end faces of the insulating cylinder is large, cracks may occur due to the difference in coefficient of linear expansion. Similarly, there is a risk that cracks may occur in the insulating shell due to the difference in the linear expansion coefficient between the insulating shell such as epoxy resin and the insulating cylinder.

これを防止するためには絶縁筒の外周壁と端部にシリコーンゴム等の応力緩和材皮を設ける必要がある。しかし、通常、真空容器を構成する固定電極側端板，可動電極側板，絶縁筒，中央シールド，内部端部シールドの固定にはろう付けが用いられている。従って金属製の椀状のシールド板が取り付けられた後に応力緩和材皮を設けることになると、接着部の端部を覆うように形成されている椀状のシールド板によって、絶縁筒の端部付近における応力緩和材皮の形成は困難である。   In order to prevent this, it is necessary to provide a stress relaxation material skin such as silicone rubber on the outer peripheral wall and the end of the insulating cylinder. However, brazing is usually used to fix the fixed electrode side end plate, the movable electrode side plate, the insulating cylinder, the central shield, and the inner end shield constituting the vacuum vessel. Therefore, when the stress relieving material skin is provided after the metal bowl-shaped shield plate is attached, the edge of the insulating cylinder is formed by the bowl-shaped shield plate formed so as to cover the edge of the adhesive portion. It is difficult to form a stress relieving material skin.

本発明の目的は、絶縁外皮の内部および真空容器内部の電界緩和を達成しながら、同時に絶縁筒の接着部に生じる熱応力等によるクラックを防げることが可能な真空スイッチギヤを提供することにある。   An object of the present invention is to provide a vacuum switchgear capable of preventing cracks due to thermal stress or the like generated in an adhesion portion of an insulating cylinder while simultaneously achieving electric field relaxation inside the insulating shell and inside the vacuum vessel. .

上記目的は、絶縁筒の両端を固定電極側端板と可動電極側端板とを接続封止して形成された真空容器と、この真空容器の内部で対向させて取り付けられた固定電極リード及び可動電極リードと、前記固定電極リードの端部に取り付けられた固定電極と、前記可動電極リードに取り付けられた可動電極とを備えた真空スイッチギヤにおいて、前記絶縁筒と前記可動電極側端板との接続部であって、この接続部の外周に外部端部シールドを設け、この外部端部シールドの内周面に設けられた係合部と、この係合部と対向する電極端板に設けられた係合部とを備え、この両係合部同士が嵌合することにより達成される。   The object is to provide a vacuum vessel formed by connecting and sealing the fixed electrode side end plate and the movable electrode side end plate at both ends of the insulating cylinder, and a fixed electrode lead attached facing the inside of the vacuum vessel, and In a vacuum switch gear comprising a movable electrode lead, a fixed electrode attached to an end of the fixed electrode lead, and a movable electrode attached to the movable electrode lead, the insulating tube and the movable electrode side end plate The outer end shield is provided on the outer periphery of the connecting portion, the engaging portion is provided on the inner peripheral surface of the outer end shield, and the electrode end plate is opposed to the engaging portion. This is achieved by fitting the engaging portions to each other.

また上記目的は、前記係部は凹部若しくは凸部で形成されていることにより達成される。   Moreover, the said objective is achieved by the said engaging part being formed in the recessed part or the convex part.

また上記目的は、前記外部端部シールドの外周端には曲面が形成され、この曲面の先端は前記絶縁筒の外周壁より絶縁外皮側に位置することにより達成される。   The above object is achieved by forming a curved surface at the outer peripheral end of the outer end shield, and the distal end of the curved surface is located closer to the insulating skin than the outer peripheral wall of the insulating cylinder.

また上記目的は、前記真空容器外部に位置する前記外部端部シールドの先端は前記絶縁筒と前記各電極側端板の接着部を覆うように成形され、前記先端は絶縁筒の端部より絶縁筒の中心部側に位置することにより達成される。   In addition, the object is to form the tip of the outer end shield located outside the vacuum vessel so as to cover the bonding portion between the insulating tube and each electrode side end plate, and the tip is insulated from the end of the insulating tube. This is achieved by being located on the center side of the cylinder.

本発明によれば、絶縁外皮の内部および真空容器内部の電界緩和を達成しながら、同時に絶縁筒の接着部に生じる熱応力等によるクラックを防げることが可能な真空スイッチギヤを提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the vacuum switchgear which can prevent the crack by the thermal stress etc. which arise in the adhesion part of an insulation cylinder simultaneously can be provided, achieving the electric field relaxation of the inside of an insulation skin and a vacuum vessel.

まず一般的な真空スイッチギヤについて図６〜図８を使って説明する。   First, a general vacuum switch gear will be described with reference to FIGS.

図６は典型的な真空スイッチギヤの構造を示す断面図である。
図６において、真空スイッチギヤ１は、絶縁筒２の両端開口部を固定電極側端板３，可動電極側端板４により気密封止して真空容器５が形成されている。固定側電極リード６は、固定電極側端板３に真空気密に固定されている。可動側電極リード７は、べローズ８を介して可動電極側端板４に固定されて真空を保持したまま固定電極６ａと可動電極７ａの開閉ができる構成となっている。このような構成の真空容器５は、絶縁筒２内を高電圧に対して優れた絶縁耐力を有する高真空を利用して、高真空中で接点が開閉する際に発生するアークを直ちに消滅させて高電圧回路を遮断するようになっている。６ｂは固定側電極リード６の固定電極側端板３への位置決めのための鍔部である。 FIG. 6 is a sectional view showing the structure of a typical vacuum switchgear.
In FIG. 6, the vacuum switch gear 1 has a vacuum vessel 5 formed by hermetically sealing both ends of an insulating cylinder 2 with a fixed electrode side end plate 3 and a movable electrode side end plate 4. The fixed side electrode lead 6 is fixed to the fixed electrode side end plate 3 in a vacuum-tight manner. The movable electrode lead 7 is fixed to the movable electrode side end plate 4 via a bellows 8 and can open and close the fixed electrode 6a and the movable electrode 7a while maintaining a vacuum. The vacuum container 5 having such a configuration immediately extinguishes an arc generated when a contact is opened and closed in a high vacuum by using a high vacuum having an excellent dielectric strength against a high voltage in the insulating cylinder 2. The high voltage circuit is cut off. Reference numeral 6b denotes a flange for positioning the fixed electrode lead 6 to the fixed electrode side end plate 3.

このように真空スイッチギヤ１は、高真空中で固定電極６ａと可動電極７ａを開閉するため、遮断に必要な電極間距離を大気中の場合より短くして高電圧回路を遮断できる。このため、真空スイッチギヤ１の電極を収納している絶縁筒２の外面をコンパクトにできるという利点がある。   Thus, since the vacuum switchgear 1 opens and closes the fixed electrode 6a and the movable electrode 7a in a high vacuum, it is possible to cut off the high voltage circuit by making the distance between the electrodes necessary for interruption shorter than in the atmosphere. For this reason, there exists an advantage that the outer surface of the insulation cylinder 2 which accommodates the electrode of the vacuum switchgear 1 can be made compact.

しかしながら、絶縁筒２がコンパクトにできるものの、絶縁筒２の外側の沿面絶縁距離が短くなるため大気中の汚損物が絶縁筒２の外周に付着した場合、耐電圧が低下して外部短絡を生じやすくなる。そのためこの対策として真空容器５の外周にエポキシ樹脂等の絶縁外皮を設けたものがある。   However, although the insulating cylinder 2 can be made compact, the creeping insulation distance outside the insulating cylinder 2 is shortened, and therefore, when dirt in the atmosphere adheres to the outer periphery of the insulating cylinder 2, the withstand voltage decreases and an external short circuit occurs. It becomes easy. Therefore, as a countermeasure against this, there is one in which an insulating skin such as an epoxy resin is provided on the outer periphery of the vacuum vessel 5.

図７は絶縁外皮で樹脂モールドされた従来の樹脂モールド真空バルブの構造を示す断面図である。
図７において、真空容器５の外側には、エポキシ樹脂等の絶縁外皮９が設けられている。一般的なこの種真空スイッチギヤ１では、絶縁筒２の両端開口部を固定電極側端板３と可動電極側端板４により気密封止して真空容器５が形成されている。この真空容器５は固定電極側端板３と可動電極側端板４と絶縁筒２とを組み合わせ、それぞれをろう付けで接着し、さらに接着剤で固定されている。 FIG. 7 is a cross-sectional view showing the structure of a conventional resin mold vacuum valve resin-molded with an insulating outer shell.
In FIG. 7, an insulating skin 9 such as an epoxy resin is provided outside the vacuum vessel 5. In this general vacuum switch gear 1, a vacuum vessel 5 is formed by hermetically sealing the both ends of the insulating cylinder 2 with a fixed electrode side end plate 3 and a movable electrode side end plate 4. The vacuum vessel 5 is composed of a fixed electrode side end plate 3, a movable electrode side end plate 4 and an insulating cylinder 2, which are bonded together by brazing and further fixed by an adhesive.

このような構成の真空スイッチギヤ１ではあるが、真空容器５の内部と絶縁外皮９内の接着部の両端部に電界集中が生じる恐れがある。このような電界集中を防ぐために絶縁外皮９内に金属製シールド板を設ける構造が提案されている。   Although it is the vacuum switchgear 1 of such a structure, there exists a possibility that an electric field concentration may arise in the both ends of the inside of the vacuum vessel 5, and the adhesion part in the insulating outer skin 9. FIG. In order to prevent such electric field concentration, a structure in which a metal shield plate is provided in the insulating outer shell 9 has been proposed.

また、図８に示すように真空容器の外周に、固定側電極リード６を露出させてエポキシ樹脂をモールドした絶縁外皮９を設けている。そして、この絶縁外皮９内には固定電極側端板３と可動電極側端板４と絶縁筒２が固定されている。この絶縁筒２の接着部の端部を覆うように金属製の椀状の外部端部シールド４（外）を設けた構造がある。   Further, as shown in FIG. 8, an insulating outer shell 9 in which the fixed electrode lead 6 is exposed and an epoxy resin is molded is provided on the outer periphery of the vacuum vessel. The fixed electrode side end plate 3, the movable electrode side end plate 4, and the insulating cylinder 2 are fixed in the insulating skin 9. There is a structure in which a metal cage-like outer end shield 4 (outside) is provided so as to cover the end of the bonded portion of the insulating cylinder 2.

この種真空スイッチギヤにおいては、上述したように固定電極側端板３，可動電極側端板４と絶縁筒２の両端面の接着面積が大きいと、互いの線膨張係数の相違によりクラックが発生する恐れがある。   In this type of vacuum switchgear, cracks occur due to the difference in linear expansion coefficient between the fixed electrode side end plate 3, the movable electrode side end plate 4 and both end surfaces of the insulating cylinder 2 as described above. There is a fear.

本発明の発明者らはクラックの発生防止を種々検討した結果、以下のような実施例を得た。   The inventors of the present invention have studied various methods for preventing the occurrence of cracks, and as a result, obtained the following examples.

本発明の実施例１に係る真空スイッチギヤを図１〜図９を参照して説明する。   A vacuum switchgear according to a first embodiment of the present invention will be described with reference to FIGS.

図１は本発明の実施例１に係る真空スイッチギヤの構成図である。
図１において、真空容器５はセラミックなどの絶縁材料で製造された概略円筒状の絶縁筒２を含んで形成されている。この真空容器５内に固定側電極リード６と可動側電極リード７が対向配置されている。各電極リード６と７の内端にはそれぞれ固定電極６ａと可動電極７ａが取り付けられている。固定電極６ａと可動電極７ａは銅などの良導電体で製造されている。固定側電極リード６は鍔部６ｂが形成された概略棒状からなり、固定電極側端板３を貫通して鍔部６ｂの一側面を固定電極側端板３に固定されている。 FIG. 1 is a configuration diagram of a vacuum switchgear according to Embodiment 1 of the present invention.
In FIG. 1, a vacuum vessel 5 is formed to include a substantially cylindrical insulating cylinder 2 made of an insulating material such as ceramic. A fixed electrode lead 6 and a movable electrode lead 7 are disposed opposite to each other in the vacuum vessel 5. A fixed electrode 6a and a movable electrode 7a are attached to the inner ends of the electrode leads 6 and 7, respectively. The fixed electrode 6a and the movable electrode 7a are made of a good conductor such as copper. The fixed-side electrode lead 6 has a substantially rod shape with a flange portion 6 b formed therein, and passes through the fixed electrode-side end plate 3 to fix one side surface of the flange portion 6 b to the fixed electrode-side end plate 3.

一方、可動側電極リード７は同様に概略棒状からなり、可動電極側端板４の孔を貫通して配設されている。この可動側電極リード７は可動電極側端板４との間に設けられた伸縮手段としてのベローズ８が設けられており、このベローズ８によって可動電極側端板４と接続されている。   On the other hand, the movable electrode lead 7 is similarly formed in a substantially bar shape, and is disposed through the hole of the movable electrode side end plate 4. The movable electrode lead 7 is provided with a bellows 8 as an expansion / contraction means provided between the movable electrode side end plate 4 and the movable electrode side end plate 4.

可動電極７ａは移動手段（図示せず）によって固定電極６ａと接離ができるようになっている。また、固定電極側端板３および可動電極側端板４の中央部には孔が形成され、この孔に固定側電極リード６と可動電極リード７が貫通されている。   The movable electrode 7a can be brought into and out of contact with the fixed electrode 6a by moving means (not shown). In addition, a hole is formed in the central portion of the fixed electrode side end plate 3 and the movable electrode side end plate 4, and the fixed side electrode lead 6 and the movable electrode lead 7 are passed through the holes.

真空容器５は絶縁筒２の両端を気密封止するために、絶縁筒２の両端に固定電極側端板３と可動電極側端板４が固着されている。両電極６ａ，７ａの接離時にはアークべーパーが生じて絶縁筒２の内周面を汚損してしまうため、両電極６ａ，７ａを囲む中央シールド１０が絶縁筒２内に固着されている。これらの部品の絶縁筒２内壁への固定は銀ろう付けが用いられている。このために生じる絶縁筒２と可動電極側端板４の接着部の電界集中を防ぐために、絶縁筒２と可動電極側端板４の接着部を覆うように内部端部シールド４（内）が取付けられている。   In the vacuum vessel 5, the fixed electrode side end plate 3 and the movable electrode side end plate 4 are fixed to both ends of the insulating cylinder 2 in order to hermetically seal both ends of the insulating cylinder 2. When the electrodes 6a and 7a are brought into contact with and separated from each other, an arc vapor is generated and the inner peripheral surface of the insulating tube 2 is soiled. Therefore, the central shield 10 surrounding both the electrodes 6a and 7a is fixed inside the insulating tube 2. Silver brazing is used to fix these components to the inner wall of the insulating cylinder 2. In order to prevent the electric field concentration at the bonded portion between the insulating cylinder 2 and the movable electrode side end plate 4 that occurs for this reason, the inner end shield 4 (inside) covers the bonded portion between the insulating cylinder 2 and the movable electrode side end plate 4. Installed.

可動電極側端板４はステンレス鋼などで製造されており、線膨張係数は１６.０×１０-6（１／Ｋ）である。この可動電極側端板４と接着固定されるアルミナなどで製造される絶縁筒２の線膨張係数は７.５×１０-6（１／Ｋ）である。 The movable electrode side end plate 4 is made of stainless steel or the like and has a linear expansion coefficient of 16.0 × 10 −6 (1 / K). The linear expansion coefficient of the insulating cylinder 2 made of alumina or the like bonded and fixed to the movable electrode side end plate 4 is 7.5 × 10 −6 (1 / K).

このような熱物性値の違いにより、熱が加わるモールディング工程の中で大きく異なった自由膨張もしくは収縮が生じ接着界面の端部に熱応力が発生する。   Due to such difference in thermophysical values, greatly different free expansion or contraction occurs in the molding process in which heat is applied, and thermal stress is generated at the end of the adhesive interface.

本実施例では、異なる線膨張係数の材料で製造される部材の接着面積を小さくすることで熱応力の発生を防ぐようにしたものである。さらに絶縁外皮９の線膨張係数は２２〜２６×１０-6（１／Ｋ）であり、絶縁筒２の線膨張係数との差が大きく、絶縁外皮９のクラックを防止する必要がある。そのために絶縁筒２の外周面と端部に応力緩和材皮２ａ（シリコンゴム等）がコーティングされている。 In the present embodiment, the generation of thermal stress is prevented by reducing the bonding area of members manufactured with materials having different linear expansion coefficients. Furthermore, the linear expansion coefficient of the insulating outer shell 9 is 22 to 26 × 10 −6 (1 / K), and the difference from the linear expansion coefficient of the insulating cylinder 2 is large, so that it is necessary to prevent the insulating outer shell 9 from cracking. Therefore, the outer peripheral surface and the end of the insulating cylinder 2 are coated with a stress relaxation material skin 2a (silicon rubber or the like).

真空容器５の外部にも絶縁筒２と可動電極側端板４の接着部における電界緩和が必要であることから、外部端部シールド４（外）が固定されている。この外部端部シールド４（外）と可動電極側端板４の取り付け手段はろう付けではなく、可動電極側端板４と同心状に凸部４ｂを有する外部端部シールド４（外）と凸部４ｂを有する可動電極側端板４を嵌め合わせて固定している。従って、ろう付けにより絶縁筒２と固定電極側端板３と可動電極側端板４とが接合されて真空容器が形成された後に応力緩和材皮２ａが絶縁筒２の外周を覆われている。応力緩和材皮２ａが絶縁筒２の端部まで形成させた後に外部端部シールド４（外）を設けるようになっている。   The external end shield 4 (outside) is also fixed to the outside of the vacuum vessel 5 because electric field relaxation at the bonding portion between the insulating cylinder 2 and the movable electrode side end plate 4 is necessary. The means for attaching the outer end shield 4 (outside) and the movable electrode side end plate 4 is not brazed, but the outer end shield 4 (outer) having a convex portion 4b concentrically with the movable electrode side end plate 4 and the convex. The movable electrode side end plate 4 having the portion 4b is fitted and fixed. Therefore, after the insulating tube 2, the fixed electrode side end plate 3 and the movable electrode side end plate 4 are joined by brazing to form a vacuum vessel, the stress relieving material skin 2 a covers the outer periphery of the insulating tube 2. . After the stress relieving material skin 2a is formed up to the end of the insulating cylinder 2, the outer end shield 4 (outside) is provided.

本実施例である絶縁筒２と可動電極側端板４との接着部を拡大図（円で囲んで拡大図）で再度説明すると、可動電極側端板４に設けられた凸部４ｂと対向するように外部端部シールド４（外）に凹部４ｃが設けられている。絶縁筒２の直下に位置する可動電極側端板４に対して外部端部シールド４（外）の先端４ａは絶縁筒２の外径より張り出し、絶縁筒２の外周に設けられた応力緩和材皮２ａよりも張り出している。   When the bonded portion between the insulating tube 2 and the movable electrode side end plate 4 according to the present embodiment is described again with an enlarged view (enlarged view surrounded by a circle), it faces the convex portion 4b provided on the movable electrode side end plate 4. As described above, the outer end shield 4 (outside) is provided with a recess 4c. The tip 4a of the outer end shield 4 (outside) protrudes from the outer diameter of the insulating cylinder 2 with respect to the movable electrode side end plate 4 positioned immediately below the insulating cylinder 2, and is a stress relaxation material provided on the outer periphery of the insulating cylinder 2. It protrudes beyond the skin 2a.

外部端部シールド４（外）の詳細な構造を図２，図３で説明する。   The detailed structure of the outer end shield 4 (outside) will be described with reference to FIGS.

図２は実施例１で説明した電極側端板の凸部を示す斜視図（ａ）と平面図（ｂ）である。
図３は実施例１で説明した外部端部シールドの凹部を示す斜視図（ａ）と平面図（ｂ）である。
図２，図３において、図２に示す可動電極側端板４の凸部４ｂと図３に示す外部端部シールド４（外）の凹部４ｃは機械加工またはおよび鋳造によって製造される。 FIG. 2 is a perspective view (a) and a plan view (b) showing a convex portion of the electrode side end plate described in the first embodiment.
FIG. 3 is a perspective view (a) and a plan view (b) showing the concave portion of the outer end shield described in the first embodiment.
2 and 3, the convex portion 4b of the movable electrode side end plate 4 shown in FIG. 2 and the concave portion 4c of the outer end shield 4 (outside) shown in FIG. 3 are manufactured by machining or casting.

可動電極側端板４の凸部４ｂと外部端部シールド４（外）の凹部４ｃの取り付け工程を以下に説明する。   A process of attaching the convex portion 4b of the movable electrode side end plate 4 and the concave portion 4c of the outer end shield 4 (outside) will be described below.

可動電極側端板４の凸部４ｂと外部端部シールド４（外）の凹部４ｃとが重ならないように外部端部シールド４（外）を可動電極側端板４の底面円周に位置させる。外部端部シールド４（外）を絶縁筒２の端部に接触させるまでに電極側端板の外壁に滑らせる。その後、外部端部シールド４（外）の凹部と電極側端板の凸部４ｂが嵌め合うように外部端部シールド４（外）を真空容器５の軸方向を中心に回転させる。外部端部シールド４（外）の凹部と電極側端板の凸部４ｂが嵌め合わされた状態で図１に示した絶縁外皮９によって真空容器全体がモールドされる。   The outer end shield 4 (outside) is positioned on the circumference of the bottom surface of the movable electrode side end plate 4 so that the convex portion 4b of the movable electrode side end plate 4 and the concave portion 4c of the outer end shield 4 (outside) do not overlap. . The outer end shield 4 (outside) is slid on the outer wall of the electrode side end plate until it comes into contact with the end of the insulating cylinder 2. Thereafter, the outer end shield 4 (outer) is rotated about the axial direction of the vacuum vessel 5 so that the concave portion of the outer end shield 4 (outer) and the convex portion 4 b of the electrode side end plate are fitted. The entire vacuum container is molded by the insulating skin 9 shown in FIG. 1 in a state where the concave portion of the outer end shield 4 (outer) and the convex portion 4b of the electrode side end plate are fitted together.

図３の外部端部シールド４（外）の形状はシールドが外端に曲面が設けられる。外部端部シールド４（外）の先端４ａは絶縁筒２の外周壁より絶縁外皮９側に位置している。これによって、図９に示すように絶縁筒２の端部と電極側板との接着部に生じる電界は、外部端部シールド４（外）がない従来構造の標準電界図９（ａ）に対し、本発明の実施例を示す図９（ｂ）では電極強度のピーク値が低くなる（実験結果では３３％低くなった）。   The shape of the outer end shield 4 (outer) in FIG. 3 is such that the shield has a curved surface at the outer end. The front end 4 a of the outer end shield 4 (outside) is located closer to the insulating skin 9 than the outer peripheral wall of the insulating cylinder 2. As a result, as shown in FIG. 9, the electric field generated at the bonded portion between the end of the insulating cylinder 2 and the electrode side plate is compared to the standard electric field diagram 9a of the conventional structure without the outer end shield 4 (outside). In FIG. 9 (b) showing the embodiment of the present invention, the peak value of the electrode strength is low (the experimental result is 33% lower).

図４は実施例２を説明するシールド板を取り付けた状態の真空スイッチギヤの部分断面図である。
図４において、実施例１と同じように真空容器５の外部にも絶縁筒２と可動電極側端板４の接着部における電界緩和が必要である。そのため外部端部シールド４（外）を取り付けは、外部端部シールド４（外）と可動電極側端板４の取り付け手段はろう付けではなく可動電極側端板４と同心状に真空容器５の端部の外部に設けられる凹部を有する外部端部シールド４（外）と凸部を有する可動電極側端板４が嵌め合うようにして固定している。 FIG. 4 is a partial cross-sectional view of the vacuum switchgear with the shield plate for explaining the second embodiment attached.
In FIG. 4, the electric field relaxation at the bonding portion between the insulating cylinder 2 and the movable electrode side end plate 4 is necessary outside the vacuum vessel 5 as in the first embodiment. Therefore, when attaching the outer end shield 4 (outside), the attachment means of the outer end shield 4 (outside) and the movable electrode side end plate 4 is not brazed but concentrically with the movable electrode side end plate 4. The outer end shield 4 (outside) having a concave portion provided outside the end portion and the movable electrode side end plate 4 having a convex portion are fixed so as to fit with each other.

図４の部分拡大図で示す可動電極側端板４の凸部４ｂと外部端部シールド４（外）の凹部４ｃは塑性加工などで製造している。可動電極側端板４の凸部４ｂは図３の場合、３６０°全周に設けたが、本実施例では凸部４ｂは２箇所以上であっても固定可能である。これらの取り付けは可動電極側端板４の凸部４ｂと外部端部シールド４（外）の凹部４ｃのＲによる弾性変形を利用することが可能である。そこで、本実施例では外部端部シールド４（外）を絶縁筒２の端部に接触させるまで外部端部シールド４（外）を電極側端板への挿入方向１１に可動電極側端板４の外壁で滑らせ、外部端部シールド４（外）の凹部４ｃと可動電極側端板４の凸部４ｂが嵌め合うようにしている。   The convex part 4b of the movable electrode side end plate 4 and the concave part 4c of the outer end shield 4 (outer) shown in the partially enlarged view of FIG. 4 are manufactured by plastic working or the like. In FIG. 3, the convex portions 4b of the movable electrode side end plate 4 are provided on the entire 360 ° circumference, but in this embodiment, the convex portions 4b can be fixed even at two or more locations. These attachments can utilize elastic deformation due to R of the convex portion 4b of the movable electrode side end plate 4 and the concave portion 4c of the outer end shield 4 (outside). Therefore, in this embodiment, the movable electrode side end plate 4 is inserted in the insertion direction 11 into the electrode side end plate until the outer end shield 4 (outside) is brought into contact with the end portion of the insulating cylinder 2. The concave portion 4c of the outer end shield 4 (outside) and the convex portion 4b of the movable electrode side end plate 4 are fitted to each other.

図５は実施例３を説明するシールド板を取り付けた状態の真空スイッチギヤの部分断面図である。
図５において、実施例３の形態では、外部端部シールド４（外）が真空容器の外部にまで位置し、絶縁筒２と外部端部シールド４（外）の接着部を覆うように曲げられた板によって形成されている。外部端部シールド４（外）の曲率部の先端４ａは絶縁筒２の端部から絶縁筒２の中央部の方に位置される。このようにシールド板に曲率部を設けることと、接着部を覆うように曲げられた板に形成することによって、真空容器内外部の大幅な電界緩和が期待できる。 FIG. 5 is a partial cross-sectional view of the vacuum switchgear with a shield plate for explaining the third embodiment attached thereto.
In FIG. 5, in the form of Example 3, the outer end shield 4 (outside) is positioned to the outside of the vacuum vessel and is bent so as to cover the bonding portion between the insulating cylinder 2 and the outer end shield 4 (outer). It is formed by a plate. The distal end 4 a of the curvature portion of the outer end shield 4 (outside) is positioned from the end of the insulating tube 2 toward the center of the insulating tube 2. Thus, by providing the shield plate with a curved portion and forming it on a plate bent so as to cover the adhesive portion, significant electric field relaxation inside and outside the vacuum vessel can be expected.

図５の部分拡大図で示す電極側端板の凸部状態４ｂと外部端部シールドの凹部４ｃは塑性加工などで製造できるが、可動電極側端板４の凸部は２箇所以上設けられている。これらの取り付け方は実施例２と同様であり、電極側端板の凸部状態４ｂと外部端部シールドの凹部４ｃ状態の弾性効果を利用するものである。つまり、外部端部シールド４（外）を絶縁筒２の端部に接触させるまで外部端部シールド４（外）を電極側端板への挿入方向１１に可動電極側端板４の外壁に滑らせ、外部端部シールド４Ｓｏｕｔの凹部と電極側端板の凸部が嵌め合わせるようになっている。   The convex state 4b of the electrode side end plate and the concave portion 4c of the outer end shield shown in the partial enlarged view of FIG. 5 can be manufactured by plastic working or the like, but the convex portions of the movable electrode side end plate 4 are provided at two or more locations. Yes. These attachment methods are the same as those in the second embodiment, and utilize the elastic effects of the convex portion state 4b of the electrode side end plate and the concave portion 4c state of the outer end shield. That is, the outer end shield 4 (outer) is slid on the outer wall of the movable electrode side end plate 4 in the insertion direction 11 to the electrode side end plate until the outer end shield 4 (outer) is brought into contact with the end of the insulating cylinder 2. The concave portion of the outer end shield 4Sout and the convex portion of the electrode side end plate are fitted together.

真空容器５の外周には、所定の厚さで設けられた樹脂などで製造する絶縁外皮９で形成されている。このとき、絶縁外皮９内部に隙間ができる恐れがあるため、真空容器５の外周形状は大きな凸凹などの複雑な形状を用いることは難しい。しかし、一般的な構造を示した図８のように、絶縁外皮９内部の電界緩和のために椀状の中央シールド１０を用いて電界集中を防げる構造にする場合、絶縁外皮９を設ける際に隙間が生じる恐れがある。   The outer periphery of the vacuum vessel 5 is formed with an insulating skin 9 made of a resin or the like provided with a predetermined thickness. At this time, since there is a possibility that a gap is formed inside the insulating outer skin 9, it is difficult to use a complicated shape such as a large unevenness as the outer peripheral shape of the vacuum vessel 5. However, as shown in FIG. 8 showing a general structure, in the case of providing a structure in which electric field concentration can be prevented by using a saddle-shaped central shield 10 for relaxing the electric field inside the insulating skin 9, when the insulating skin 9 is provided. There may be a gap.

本実施例に示した３つの外部端部シールド４（外）は凹部４ｃの先端４ａに大きく曲面を設け、絶縁筒２の外周壁より絶縁外皮９内部に位置させている。これにより大きく曲げるなどの複雑な構造を設けずに電界緩和が期待できる。また、外部端部シールド４（外）の表面および可動電極側端板４の表面に導電性の塗料が塗布されることで、絶縁外皮と外部端部シールドの凹部４ｃおよび可動電極側端板４の接触界面に剥離が生じても絶縁性能を確保することができる。   The three outer end shields 4 (outside) shown in the present embodiment are provided with a large curved surface at the tip 4a of the recess 4c, and are positioned inside the insulating sheath 9 from the outer peripheral wall of the insulating cylinder 2. Thus, electric field relaxation can be expected without providing a complicated structure such as a large bending. Further, by applying a conductive paint to the surface of the outer end shield 4 (outside) and the surface of the movable electrode side end plate 4, the insulating skin and the recess 4 c of the outer end shield and the movable electrode side end plate 4 are provided. Even if peeling occurs at the contact interface, insulation performance can be ensured.

実施例１の形態を説明する真空スイッチギヤの断面図である。It is sectional drawing of the vacuum switchgear explaining the form of Example 1. FIG. 実施例１の電極側端板の凸部を説明する斜視図（ａ）及び正面図（ｂ）である。It is the perspective view (a) and front view (b) explaining the convex part of the electrode side end plate of Example 1. FIG. 実施例１の外部端部シールドの凹部を示す斜視図（ａ）及び平面図（ｂ）である。It is the perspective view (a) and top view (b) which show the recessed part of the external end part shield of Example 1. FIG. 実施例２を説明する真空スイッチギヤの断面図である。It is sectional drawing of the vacuum switchgear explaining Example 2. FIG. 実施例３を説明する真空スイッチギヤの断面図である。It is sectional drawing of the vacuum switchgear explaining Example 3. FIG. 一般的な真空スイッチギヤの断面図である。It is sectional drawing of a common vacuum switchgear. 絶縁外皮で樹脂モールドされた一般的な樹脂モールド真空スイッチギヤの断面図である。It is sectional drawing of the general resin mold vacuum switchgear resin-molded with the insulation outer shell. 外部端部シールド板を取り付けた一般的な真空スイッチギヤの断面図である。It is sectional drawing of the general vacuum switchgear which attached the external end part shield board. 一般的な形態（ａ）と本発明の形態（ｂ）の電界強度を比較する図である。It is a figure which compares the electric field strength of the general form (a) and the form (b) of this invention.

符号の説明Explanation of symbols

１ 真空スイッチギヤ
２ 絶縁筒
２ａ 応力緩和材皮
３ 固定電極側端板
４ 可動電極側端板
４（内） 内部端部シールド
４（外） 外部端部シールド
４ａ 先端
４ｂ 凸部
４ｃ 外部端部シールドの凹部
５ 真空容器
６ 固定側電極リード
６ａ 固定電極
６ｂ 鍔部
７ 可動側電極リード
７ａ 可動電極
８ ベローズ
９ 絶縁外皮
１０ 中央シールド
１１ シールドの電極側端板への挿入方向 DESCRIPTION OF SYMBOLS 1 Vacuum switch gear 2 Insulating cylinder 2a Stress relaxation material 3 Fixed electrode side end plate 4 Movable electrode side end plate 4 (inner) Internal end shield 4 (outside) External end shield 4a Tip 4b Convex part 4c External end shield Concave portion 5 vacuum vessel 6 fixed side electrode lead 6a fixed electrode 6b collar 7 movable side electrode lead 7a movable electrode 8 bellows 9 insulating outer skin 10 central shield 11 insertion direction of shield to electrode side end plate

Claims (4)

絶縁筒の両端を固定電極側端板と可動電極側端板とを接続封止して形成された真空容器と、この真空容器の内部で対向させて取り付けられた固定電極リード及び可動電極リードと、前記固定電極リードの端部に取り付けられた固定電極と、前記可動電極リードに取り付けられた可動電極とを備えた真空スイッチギヤにおいて、
前記絶縁筒と前記可動電極側端板との接続部であって、この接続部の外周に外部端部シールドを設け、この外部端部シールドの内周面に設けられた係合部と、この係合部と対向する電極端板に設けられた係合部とを備え、この両係合部同士が嵌合することを特徴とする真空スイッチギヤ。 A vacuum vessel formed by connecting and sealing the fixed electrode side end plate and the movable electrode side end plate at both ends of the insulating cylinder, and a fixed electrode lead and a movable electrode lead attached facing each other inside the vacuum vessel; In a vacuum switchgear comprising a fixed electrode attached to an end of the fixed electrode lead, and a movable electrode attached to the movable electrode lead,
A connecting portion between the insulating cylinder and the movable electrode side end plate, an outer end shield is provided on the outer periphery of the connecting portion, an engaging portion provided on an inner peripheral surface of the outer end shield, and The vacuum switchgear characterized by including an engaging portion provided on an electrode end plate facing the engaging portion, and the engaging portions are fitted to each other. 請求項１記載の真空スイッチギヤにおいて、
前記係部は凹部若しくは凸部で形成されていることを特徴とする真空スイッチギヤ。 The vacuum switchgear according to claim 1, wherein
The vacuum switchgear characterized in that the engaging part is formed by a concave part or a convex part. 請求項１記載の真空スイッチギヤにおいて、
前記外部端部シールドの外周端には曲面が形成され、この曲面の先端は前記絶縁筒の外周壁より絶縁外皮側に位置することを特徴とする真空スイッチギヤ。 The vacuum switchgear according to claim 1, wherein
A vacuum switchgear characterized in that a curved surface is formed at an outer peripheral end of the outer end shield, and a distal end of the curved surface is positioned closer to an insulating skin than an outer peripheral wall of the insulating cylinder. 請求項１記載の真空スイッチギヤにおいて、
前記真空容器外部に位置する前記外部端部シールドの先端は前記絶縁筒と前記各電極側端板の接着部を覆うように成形され、前記先端は絶縁筒の端部より絶縁筒の中心部側に位置することを特徴とする真空スイッチギヤ。 The vacuum switchgear according to claim 1, wherein
The tip of the outer end shield located outside the vacuum vessel is formed so as to cover the bonding portion between the insulating tube and each electrode side end plate, and the tip is on the center side of the insulating tube from the end of the insulating tube. Vacuum switchgear characterized by being located in
JP2008169775A 2008-06-30 2008-06-30 Vacuum switchgear Expired - Fee Related JP4729600B2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
JP2008169775A JP4729600B2 (en) 2008-06-30 2008-06-30 Vacuum switchgear
TW098120085A TWI416568B (en) 2008-06-30 2009-06-16 Vacuum switch and vacuum switch mechanism
SG200904413-2A SG158058A1 (en) 2008-06-30 2009-06-26 Vacuum switch and vacuum switchgear
KR1020090058178A KR101231639B1 (en) 2008-06-30 2009-06-29 Vacuum switches and vacuum switching gear
CN2009101509732A CN101620948B (en) 2008-06-30 2009-06-29 Vacuum switch and vacuum switchgear
DE602009001105T DE602009001105D1 (en) 2008-06-30 2009-06-30 Vacuum switch and vacuum switching device
US12/494,674 US8227720B2 (en) 2008-06-30 2009-06-30 Vacuum switch and vacuum switchgear
AT09008572T ATE506684T1 (en) 2008-06-30 2009-06-30 VACUUM SWITCH AND VACUUM SWITCHING DEVICE
EP09008572A EP2141720B1 (en) 2008-06-30 2009-06-30 Vacuum switch and vacuum switchgear
HK10104028.6A HK1138104A1 (en) 2008-06-30 2010-04-23 Vacuum switches and vacuum switch apparatus

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JP2013222496A (en) * 2012-04-12 2013-10-28 Toshiba Corp Resin insulation vacuum valve
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WO2017036711A1 (en) * 2015-09-03 2017-03-09 Siemens Aktiengesellschaft Vacuum interrupters having a retaining element receptacle and/or a retaining element, and method for producing the same
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