JPS59101732A - Bulb for vacuum interrupter - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は勇をインタラプタに係り、％にしや−「時に生
じたアークと平行な磁界ｔ−発生させるコイルヶ備えて
成る真空インタラプタの電極に関したものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an interrupter, and more particularly, to an electrode of a vacuum interrupter comprising a coil for generating a magnetic field parallel to an arc generated when the arc is generated.

従来、しゃ断性能の向上を図ること２目的として、アー
クに平行な磁界ＰｊＴ謂軸刃軸方向磁界ａ：磁界）を印
加する方式の真空インタラゲタが提供されて２シ、この
棟、軸方向磁界印加式の真空インタラゲタの一例を第１
図及び第２図に示す。Conventionally, a vacuum interrogator has been provided which applies a magnetic field parallel to the arc (so-called shaft blade axial magnetic field a: magnetic field) for the purpose of improving the breaking performance. An example of the vacuum interrogator of the formula is shown in the first example.
As shown in FIG.

図に２いて、ＩＯは真空容器でろり、ガラス又はセラミ
ックスから成シ且り接続された？＃５縁簡／／＆。In Figure 2, is the IO made of glass or ceramics and connected in a vacuum container? #5 Entrance card //&.

／／ｂと、この杷縁筒／／ａ、／／ｂの軸方向の両端ｒ
刺止する金鵬から成る端板／、ｌ、／Ｊとで栴成さ牡て
いる。そして端板ｌλに気密に貫通固定さｎたリード棒
−ａの内端部にはコイル電極軸を介して接点′＃Ｌ極３
ａが設けてわる。また他方のｆ＠板１３には、リード棒
コｂがベローズ／参に介して気密に貫通されてａＪ動自
在に設けらｎｌこのリード棒−２ｂの内端部には、コイ
ル電極りｂｔ−介して接点電極３ｂが設けられている。//b, and both ends r in the axial direction of this lozenge pipe //a, //b
It is made up of end plates /, l, /J made of metal pins that are fixed. Then, at the inner end of the lead rod -a, which is airtightly fixed through the end plate lλ, there is a contact '#L pole 3 via the coil electrode shaft.
A is provided. In addition, on the other f@ plate 13, a lead rod b is hermetically penetrated through a bellows and is movably provided. A contact electrode 3b is provided therebetween.

前記各接点電極３ａ、Ｊｂの部分は第２図に示　。The respective contact electrodes 3a and Jb are shown in FIG.

す如く構成されてｊ？シ、可動側でめる接点Ｉ！極３ｂ
にて説明すると、この接点電極３ｂは、外周部から半径
方向の内方に伸びる複数のスリット溝３０會具倫してい
る。このスリット溝３０は、軸方向磁界によって接点亀
＆Ｊｂ内にうず電流が発生するのを防止すべく設けら牡
ているものである。Is it structured like that? Contact point I that can be closed on the movable side! pole 3b
To explain, this contact electrode 3b has a plurality of slit grooves 30 extending radially inward from the outer periphery. This slit groove 30 is provided to prevent eddy current from being generated in the contact point &Jb due to the axial magnetic field.

またコイル電極弘すは、図示省略のり一ド俸コｂから半
径方向外方に伸びる被数の胱と、この各りの外端部に一
端が接続さｎた複数の円弧ｍ４ｔｔとで構成され、且つ
各円弧部４ｔｌの先端は接続環体ＦＪｌｉ−介して接点
電極３ｂの背部に接続されてい）　　る。これによって
リードｍ−ｂと接点１！極３ｂとの間においてコイル電
極ｐｂにより電流をリード禅Ｊｂｔ−曲繞するループ電
流に変え、また相手側のコイル電極４ｃａＫ＆いても同
様なループ電流に変えられ、これによシ接点電極ｊ　ａ
　、　ｊ　ｂＯ接触面に直交する方向つまル軸万回の磁
界（アークに平行な磁界）ｔ−発生するように成してい
る。In addition, the coil electrode is composed of a plurality of cylinders extending radially outward from a glue plate (not shown) and a plurality of circular arcs (m4tt) with one end connected to the outer end of each of the cylinders. , and the tip of each arcuate portion 4tl is connected to the back of the contact electrode 3b via a connecting ring FJli. This leads to lead m-b and contact 1! Between the pole 3b and the coil electrode PB, the current is changed into a loop current that curves around the lead, and the coil electrode 4caK on the other side is also changed into a similar loop current, thereby causing the contact electrode j a
, j bO A magnetic field (magnetic field parallel to the arc) t- is generated in the direction orthogonal to the contact surface, that is, in the direction perpendicular to the axis.

そして一方の接点電極Ｊｂが図中に２いてり一ド桿−２
ｂｉ介して上下動することによって、他方の接点電極Ｊ
ａＫｉｌｆ’離し、こｎによル寛路の投入及びしゃ断が
行なわれるものである。And one contact electrode Jb is shown as 2 in the figure.
By moving up and down through bi, the other contact electrode J
aKilf' is released, and this is how the input and cut-off of the recirculation path is performed.

な２、第１図中に２いて、ｌｊは中間シールドｔ／Ｊａ
及び／４ｂは補助シールド、１７はベローメシールドで
ろって、各々非磁性のステンレス鏑から成るシールド体
でめシ、一対の接点電極Ｊ　Ｒ。2, in Figure 1, lj is the intermediate shield t/Ja
and /4b are auxiliary shields, and 17 is a bellomet shield, each of which is a shield body made of non-magnetic stainless steel, and a pair of contact electrodes JR.

３ｂから飛散する全域蒸気を捕捉すると共に電界紅和を
図るものである。This is to capture the vapor scattered over the entire area from 3b and to improve the electric field.

ところで、前述のように構成された軸方向磁界印加式の
１（空イｙタラゲタにあっては、軸方向磁界に基因して
接点電極３に、Ｊｂ内にうす電流が生ずる間石がある。By the way, in the axial magnetic field application type 1 (air type) configured as described above, there is a gap in which a thin current is generated in Jb in the contact electrode 3 due to the axial magnetic field.

このうず電流が生ずると一磁界が減衰したシ又は位相の
遅れｔ生ずる間組かめるために、他力このうず電流が生
じないようにしなけ扛はならない、％に接点電極Ｊａ、
Ｊｂは磁界にさらさｎる面粗が広いためにうず’ｆｈ　
ＤＩＣが発生しやすいものであった。When this eddy current is generated, the magnetic field is attenuated or the phase lag t occurs.In order to maintain the relationship, it is necessary to prevent this eddy current from occurring.
Jb has a wide surface roughness that is exposed to the magnetic field, so it is undulating.
DIC was likely to occur.

このようなことから、従来では第２図に示す如く半径方
向に位するスリン）溝３”’ｆｆ−複数本設けることに
よって、接点ｔ電極Ｊａ、Ｊｂｙ被欽のブロックに分割
し、これによって接点１１ＥｋＪａＦＪｂにうず電流が
生ずるのｔ−防止するようにしていた。For this reason, conventionally, as shown in Fig. 2, by providing a plurality of grooves 3"'ff located in the radial direction, the contact t electrodes Ja and Jby are divided into blocks, and thereby the contact It was designed to prevent eddy current from occurring in the 11EkJaFJb.

しかしながら、従来のように接点電極Ｊ　ａ　、　Ｊｂ
にスリツＨＪＱ：３０ｉ設けてうす電流を防止するもの
にめっては次のような欠点がめった。However, as in the conventional case, the contact electrodes J a , Jb
Those that prevent thin current by installing a slit HJQ:30i often have the following drawbacks.

■　接点を極Ｊ＆、Ｊｋ）の表向にスリット溝３０のエ
ツジ部が形成さｎるために、しゃ断開他状態にνいて極
間閃絡１Ｆ−誘発しやすく、真空インタラプタの尚′屯
圧大谷飯化には限界がめった。■ Since the edge of the slit groove 30 is formed on the surface of the contact poles J&, Jk), it is easy to cause a flash fault between the poles when the contact is in the open state, and the pressure of the vacuum interrupter is increased. Otani Hanka had reached his limit.

■　スリット溝３０Ｑ）’；＋在によって、接点’ａ惚
Ｊａ。■ The slit groove 30Q)';+ is connected to the contact point 'a'.

３ｂと同心的な大きなうず′ｔＩＬ泥の発生は防止でき
るものの、各スリット溝３０間に２ける分割ブロック内
に２いてνｒ次に小形のうす一流が生ずるものでめつ１
ζ。このうず一流の発生ｉｔ史に防止ツーるには、一層
スリット溝３０の数を増す必擬があるが、そうすると別
記■の間組が一層＃ＩＭ者となる。丈には機械的頻度の
低下が著しいものとなってｉ［久性が態化するといった
新たな間ｍ會ｉ記するものでおった。Although it is possible to prevent the generation of large swirls concentric with 3b, a small thin flow is generated within the two divided blocks between each slit groove 30.
ζ. In order to prevent the occurrence of this whirlpool in the history of IT, it is inevitable to further increase the number of slit grooves 30, but if this is done, the group in the appendix (2) will become even more #IM. In terms of length, there was a significant decrease in mechanical frequency, and a new period was recorded where durability was taking shape.

くり返しのしゃ断によってスリット衡３０が溶出金ハに
よってうまりてしまい、結果的にうず電流が生じていた
。Due to repeated interruptions, the slit balance 30 became clogged with eluted gold, resulting in the generation of eddy currents.

本発Ｅり３は以上の点に鑑みて成されたものでる広内部
に螺細状の溝七備えて接点電極を構成し、こ扛によって
磁界の発生に悪影ｍｌ−＆はすうず電流の発生を防止す
ると共にしゃ断性能の同上が図１１且つ耐久性の向上し
たＪＩ４−！２インタラゲタの’ＭＬ極を提供すること
にある。The present invention, E3, was developed in view of the above points.The contact electrode is constructed with seven spiral grooves in the wide interior, and this creates an adverse effect on the generation of the magnetic field. JI4-! which prevents the occurrence of , has the same breaking performance as shown in Figure 11, and has improved durability! The aim is to provide the 'ML pole' of two interrogators.

次に本発明の実施例を彫３図ないしあ７−に基づいて説
明するが、こｒしらの図に２いて前述の第１図及び第２
図と同一符号を刊するもの祉こｎらと同等品を示すもの
でるるからこｎらの絆細な説まず第３図ないし第６図に
基づいて本発明の一実施例′を説明する。Next, an embodiment of the present invention will be explained based on the engravings 3 to 7.
Items with the same reference numerals as the figures are used to indicate equivalent products. First, an embodiment of the present invention will be explained based on Figures 3 to 6. .

真空容器ｉｏは、非磁性のステンレス鋼から成る金員円
筒ＩＩと、この金部円筒ｉｔの軸方向の両側に法絖固足
した絶縁藺／／ａ、／／ｂと、こｎら絶縁１＠ｔｉ＠、
ｉ、ｉｂの端部を到鯛する端板／ｌ　、／Ｊとで徊成さ
ｎている。そして具望谷器ｉｏ内で且り骸鵜円１ｉＭ　
／♂の軸方向ｌｌ１ｌ端部には、非磁性のステンレス鋼
から成る略筒状のシールド／ｊｇ、／！ｂが設けらｎて
２シ、こ才りらシールド／Ｊａ、／Ｊｂは各々絶縁ｙ４
／／ａ、／／ｂ側に伸びると共にリード弊−２ａ、、２
ｂｉ囲繞する如く配置されている。The vacuum vessel IO consists of a metal cylinder II made of non-magnetic stainless steel, insulation mats //a and //b fixed to both sides of the metal cylinder IT in the axial direction, and insulation 1. @ti@,
It is formed by end plates /l and /J that reach the ends of i and ib. And in Guboudani io, there is 1 iM of Mukuro cormorant
A substantially cylindrical shield made of non-magnetic stainless steel is installed at the axial direction ll1l end of /♂, /jg, /! b is provided n and 2 shi, the shields /Ja and /Jb are each insulated y4
//a, //b extends to the side and the lead is weak -2a,,2
bi is arranged so as to surround it.

１矩側のリード棒λａのＰｉ端部には、俊速するコイル
電ｆｇＳと接点電極３ａとが設けられている。A fast-moving coil fgS and a contact electrode 3a are provided at the Pi end of the lead rod λa on the first rectangular side.

このコイル′Ｎ、極ｊは、前記真空容器ｌＯｔ形成する
金属円筒ｉｔの内側部位に位して収納配置されると共に
接点電極３ａを囲繞し、且つ′５Ｊ動側のリード棒コｂ
の内一端部に設けた接点電極３ｂｔもしゃ断時（第３図
に示す状態）に２いてな３かつ囲繞する如く設けられて
いる。This coil 'N, pole j is housed inside the metal cylinder it forming the vacuum vessel lOt, surrounds the contact electrode 3a, and is connected to the lead rod b on the moving side '5J.
The contact electrode 3bt provided at one end of the contact electrode 3bt is also provided so as to surround the contact electrode 3bt when the contact electrode 3bt is cut off (the state shown in FIG. 3).

前記コイル電極ｊの構成及び接点電極Ｊａ、Ｉ）−ド棒
−２ａとの貼合構成を詳細に説明すると、リード棒−２
ａの内端部は、半円状の段付形状に成されて、突部−２
１と低部−２−２とが形成されてＰ９、この突部−２１
はコイル電極！を形成する一対の半径方向に位する腕！
！、！ｌ、のうちの一方の腕１１に直接結合さ几、また
低部ココは尚抵抗体（例えば非磁性のステンレス銅、イ
ンコネル合金、セラミックス）から成るスペーサＪＪｇ
介して他方の腕ｊ６に結合されている。To explain in detail the structure of the coil electrode j and the bonding structure with the contact electrode Ja,I)-de rod-2a, the lead rod-2
The inner end of a is formed into a semicircular stepped shape, and the protrusion -2
1 and the lower part -2-2 are formed, P9, this protrusion -21
is a coil electrode! A pair of radially positioned arms forming a!
! ,! The spacer JJg is directly connected to one arm 11 of the L, and the lower part is made of a resistive material (for example, non-magnetic stainless steel copper, Inconel alloy, ceramics).
It is connected to the other arm j6 via the arm j6.

そしてコイル電極−ｔｔｉ、１箇所にスリン）ｊコ全具
備して略円筒状に形成されたコイル本体ｚｉと、該コイ
ル本体ｊ／の円弧方向の両端部ｊ３゜！≠の部位から半
径方向内方に伸び且つ平行配置さルた一対の腕２２及び
！６と、で構成さｊ″している。この一対のＰＲ”　＃
　”はコイル不休！ｌの軸方向の一１４ｉｉ１４１１（
第４図中の上端側）の部位に設けである。Then, there is a coil body zi which is formed into a substantially cylindrical shape and includes a coil electrode -tti, a sulin) j in one place, and both ends j3° in the arc direction of the coil body j/! A pair of arms 22 extending radially inward from the part marked ≠ and arranged in parallel and! This pair of PRs is composed of 6 and 6.
” is the coil in the axial direction of 114ii1411(
It is provided at the upper end side in Fig. 4).

接点′！１．極３ａの背面（相手接点電極３ｂと接触す
る反対向）側には接続体３１が結合されておシ、この接
続体３１の端部は、半円状の段付形状４Ｃ成さオ″して
突部３−２と、低部３３とが形成されている。contact'! 1. A connecting body 31 is coupled to the back side of the pole 3a (the opposite side of contact with the mating contact electrode 3b), and the end of this connecting body 31 has a semicircular stepped shape 4C. A protrusion 3-2 and a low portion 33 are formed.

仁の突部３−２は前記コイル電極ｊの一方の腕！６の内
端部に直接結合され、また低部３３は前記スペーサー２
３と同様な材料から成るスペーサ３４′全介して他方の
腕ｊｊに結合されている。The protrusion 3-2 is one arm of the coil electrode j! 6, and the lower part 33 is connected directly to the inner end of the spacer 2.
It is connected to the other arm jj entirely through a spacer 34' made of the same material as No. 3.

しかして本発明の特徴とする点は、接点電極Ｊａ。However, the feature of the present invention is the contact electrode Ja.

３ｂの構成にお夕、一対の接点電極Ｊ＆、Ｊｂは同様な
構成であるから、固定側の接点電極３ａにてＷ、４図及
び第５図に基づき説明する。Since the pair of contact electrodes J& and Jb have the same structure as that of 3b, the fixed side contact electrode 3a will be explained based on FIGS. 4 and 5.

すなわち、接点電極３ａは、電極本体３ｊに螺線状の溝
Ｊ４ｔ−備え且つ電極本体３！の背面（第４図中の上方
側）側に補強体３７ｔ−一体的に備えて構成されて２シ
、前記螺線状の講３６は一電極不体３ｊの接触面３ｊａ
に開口＜ｎ出）することのない深さに設けられている。That is, the contact electrode 3a has a spiral groove J4t in the electrode body 3j and the electrode body 3! The reinforcing body 37t is integrally provided on the back side (upper side in FIG. 4) of
It is provided at a depth that does not cause any openings to occur.

そして、！他本体３ｊは、銅又は蛸合金から成シ、また
補強体３７は、機械的強度が強く且つ低導電圧の材料例
えばステンレス鋼又はインコネル合金から成るものであ
る。更に電極本体３ｊの材料によっても若干異なるが、
螺線状の溝３６の部分における肉厚みｉｔ＋−は、１〜
２．５ｍ以下、また電極本体３ｊの中央部ｓｚｂ　（接
続体３１が結合される部分）の断面積は、径が３０〜４
０調の断面積相当値以下、とすることがうず電流発生防
止の点で望ましい二また螺線状の溝３６Ｖｉ−設けるこ
とによって形成された螺線状の尋体部ＪＪｃの断面積（
Ａｘ４）は、を極本体３！の径及び螺線状のＯｔ３乙の
切り方によって若干の差はあるものの、ｉｉｔｍ本体３
ｊの径が５０〜２００園のものを実験した限９において
はＡＸＪ−≦５０閣ζあれば、うず電流の発生はわずか
なものであった。and,! The other main body 3j is made of copper or octopus alloy, and the reinforcing body 37 is made of a material with high mechanical strength and low conductive voltage, such as stainless steel or Inconel alloy. Furthermore, although it varies slightly depending on the material of the electrode body 3j,
The wall thickness it+- at the portion of the spiral groove 36 is 1 to
2.5 m or less, and the cross-sectional area of the central part szb of the electrode main body 3j (the part to which the connecting body 31 is connected) has a diameter of 30 to 4 m.
The cross-sectional area of the spiral body portion JJc formed by providing the bifurcated spiral groove 36Vi is desirably equal to or less than the value equivalent to the cross-sectional area of the 0 tone in terms of preventing the generation of eddy current (
Ax4) is the pole body 3! Although there are slight differences depending on the diameter of the Ot3 and the way the spiral Ot3 is cut, the IITM main body 3
In Limit 9, an experiment was carried out using cases where the diameter of j was 50 to 200 mm, and when AXJ-≦50 ζ, the generation of eddy current was slight.

次に電流の流れ＊ｍ明すると、例えば第３図において固
定側のリード棒−２ｇ’ｌｉ下向に電流が流れると、突
部λ／Ｑ介してコイル電極！の一方の腕ｊ！に流ｎ１そ
してコイル本体！ｌの一端！３からコイル本体ｊｌをル
ープ状に流れて他端ｊ３に至シ、次に他方の腕ｊ／、ｔ
−介して接続体３１の突部３−２に至ると共に接点電極
３ａ及び３ｂ會介して可動側のリード棒、２ｂに至るも
のであシ、前記コイル本体ｚｔ２電流がループ状に流れ
ることによって軸方向磁界を発生するものである。Next, the current flow *m For example, in FIG. 3, when a current flows downwards on the fixed side lead rod -2g'li, it passes through the protrusion λ/Q to the coil electrode! One arm of j! Niryu n1 and the coil body! One end of l! 3 flows through the coil body jl in a loop to the other end j3, then the other arm j/, t
- through the coil main body zt2 to the protrusion 3-2 of the connecting body 31 and through the contact electrodes 3a and 3b to the movable lead rod 2b. It generates a directional magnetic field.

ところで接点室＆Ｊａ（Ｊｂ）の部分における電流は、
通電時にあっては主に中央部Ｊ！ｂｆ流れている。そし
てしゃ断時にあってはアークが接触面３ｊａ全体に分散
しているので特に周辺側におけるアーク全弁して流れる
電流は、螺線状の溝３６の底部と接触面ＪＪａとの間の
薄肉部分を半径方向に導通して流れるものである。By the way, the current in the contact chamber &Ja (Jb) is
When energized, the central part J! bf is flowing. When the arc is cut off, the arc is dispersed over the entire contact surface 3ja, so the current that flows through the entire arc, especially on the peripheral side, flows through the thin part between the bottom of the spiral groove 36 and the contact surface JJa. It conducts and flows in the radial direction.

次に第７図に示すものは、本発明の他の実施例から成る
接点を他３ａであシ、接続体３１が接続される中央のボ
ス部Ｊｌａの外周側に綿線溝３６を形成する如く平角導
体（又は先導体）Ｊｌｆ巻回し、そしてこの平角導体Ｊ
ｔ’ｌｊ（補強体３７と略円板状に形成さｎた厚み１〜
２．５　ｍの接触体Ｊりとで挾持して一体結合構成した
ものでるる。Next, in the one shown in FIG. 7, a contact point according to another embodiment of the present invention is replaced with another 3a, and a cotton wire groove 36 is formed on the outer peripheral side of the central boss portion Jla to which the connecting body 31 is connected. Winding the rectangular conductor (or leading body) Jlf, and winding this rectangular conductor J
t'lj (formed approximately in the shape of a disk with the reinforcing body 37, thickness 1~
It is made up of a 2.5 m long contact body that is clamped and integrally connected.

この第７図の！成によ匙は、螺線状の溝３乙の形成が簡
単であり、しかも接触体３２は別構成であるから、Ｌ−
？断行性に応じた徨々の材質のものにて形成でき、高価
な特殊材料の場会でも使用量はわずかなものでるるから
価格低減化が期待できる。This figure 7! In the Nariyo spoon, it is easy to form the spiral groove 3B, and the contact body 32 is a separate structure, so L-
? It can be formed from a variety of materials depending on the cutting properties, and even in cases where expensive special materials are used, only a small amount is used, so a reduction in cost can be expected.

なお、以上の実施例は、−足側の接点’ｍ極３ａに訃い
て説明したが、可動側の接点電極３ｂも同様な構成であ
シ、接点電極ＪｂＫあってはコイル本体３ｊの中央部３
ｔｂ（ｇｓ図）又はボス部Ｍ。Although the above embodiment has been explained with reference to the contact 'm pole 3a on the - foot side, the contact electrode 3b on the movable side has a similar structure, and the contact electrode JbK has a central part of the coil body 3j. 3
tb (gs diagram) or boss part M.

（Ｍ７図）にリード棒−２ｂの先端が接合さｎるもので
ある。The tip of the lead rod 2b is connected to (Fig. M7).

また補強体Ｊ７Ｊｄ、円板状の形状であっても差し支え
ないが、半径方向の腕を複数本備えて成る形状でおって
も良い。Further, the reinforcing body J7Jd may have a disc-like shape, but it may also have a shape including a plurality of radial arms.

更に軸方向磁界を発生させるコイル電＆は、第３図にて
説明した如く、一対の接点ｔａ極Ｊ　ａ、Ｊｂｔ囲繞す
る如く設けらｎたものに限らず、第１図のように接点電
極の背部に設けたものでも良く、また扛真空容器ｉｏの
外部に設けたものでｈっても差しつかえないものである
。Furthermore, the coil electric field that generates the axial magnetic field is not limited to the one that surrounds the pair of contact poles Ja and Jbt as explained in FIG. It may be provided on the back of the vacuum container, or it may be provided on the outside of the vacuum container.

以上の説明から明らかなように本発明から成るるような
種々の効果を奏することができるものでおる。As is clear from the above description, the present invention can produce various effects.

■　′ＦｊＬ極の接触面３！ａに従来のようにスリット
溝を備えていないので、凸凹又はエツジ部が全く存在せ
ず平担面であるから、開極状態に訃いて極…Ｊ閃絡が生
ずる開館は暦消され耐電圧特性の同上が図扛て真空イン
タラフ”りの高亀圧大谷１化が期待できる。■ 'FjL pole contact surface 3! Since A is not equipped with slit grooves like conventional ones, it is a flat surface with no unevenness or edges at all, so openings that can occur in an open state and cause a flash short circuit are eliminated, and the withstand voltage is reduced. The same characteristics as above can be expected to result in a high tortoise pressure Otani 1 with a vacuum interface.

■　接点電極は、内部に螺線状の溝３６全備えているの
で、螺線状の導体部ＪＪｃは長いものとなって抵抗が大
きいものでるるがら、軸方向磁界が印加されてもこれに
よってうす一流が接点電極内に生ずることはほとんどな
い。よって磁界が減衰することはなく、また位相遅れも
防止できてしゃ断性能の向上が図れるものである。■ Since the contact electrode has all the spiral grooves 36 inside, the spiral conductor part JJc is long and has a large resistance, but even when an axial magnetic field is applied, it A thin current rarely forms in the contact electrode. Therefore, the magnetic field is not attenuated, and phase lag can also be prevented, thereby improving the blocking performance.

■　接点電極は螺線状の溝を備えているのでその分ｍｕ
化が図九、特に可動側にあってはしゃ断及び投入時にお
ける衝撃の問題を削減できて耐久性の向上が図れるはか
ルでなく、操作力の低減が図れる。特に大容量の真空イ
ンタラプタに２いてこの効果は顕著となるものである。■ The contact electrode has a spiral groove, so the mu
As shown in Figure 9, especially on the movable side, it is possible to reduce the problem of impact during shutoff and loading, which not only improves durability but also reduces the operating force. This effect is particularly noticeable in large-capacity vacuum interrupters.

■　接点電極に２ける螺線状の溝３６ＩＩｉ、を極内部
に位して設けてあって、軸方向の一方には補強体３７が
、また他方には接触面Ｊｊａｆ形成する部分（第５図）
又り接触体３り（第７図）が設けら九ていてサンドイッ
ッ°状態であるから、従来のようにスリット溝を設けた
ものに比較して機械的強度は高く耐久性の向上が図れる
ものである。(2) Two spiral grooves 36IIi are provided in the contact electrode, and the reinforcing body 37 is provided on one side in the axial direction, and the contact surface Jjaf is formed on the other side (Fig. 5). )
In addition, since the contact body 3 (Fig. 7) is not provided and it is in a sandwich state, the mechanical strength is higher than the conventional one with slit grooves, and the durability can be improved. It is.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の真空インタラプタの断面図、第２図は従
来の接点電極部の斜視図、第３図は本発明からなる接点
電極を備えて成る真をインタラプタの断面図、第４図は
第３図のコイル電極及び接点を極部の分解斜視図、第５
図は第３図（不発明の一実施例）の接点電極の断面図、
第６図は第５図のＡ−Ａ線に２ける断面図、第７図は本
発明の他の実施例から成る接点電極の断面図である。 ｉｏ・・・真空容器、Ｊ＆、３ｂ・・・接点を極、３６
・・・螺線状の溝。 第４図 第５図 第６図 第７図 ３９　　３８ａFIG. 1 is a sectional view of a conventional vacuum interrupter, FIG. 2 is a perspective view of a conventional contact electrode section, FIG. 3 is a sectional view of a true interrupter equipped with a contact electrode according to the present invention, and FIG. 4 is a sectional view of a conventional vacuum interrupter. An exploded perspective view of the pole part of the coil electrode and contact in Figure 3, Figure 5
The figure is a cross-sectional view of the contact electrode in Figure 3 (an embodiment of the invention),
FIG. 6 is a sectional view taken along the line AA in FIG. 5, and FIG. 7 is a sectional view of a contact electrode according to another embodiment of the present invention. io...vacuum container, J&, 3b...contact as pole, 36
...Spiral groove. Figure 4 Figure 5 Figure 6 Figure 7 39 38a

Claims (1)

【特許請求の範囲】[Claims] 真空容器（１０）内に２いて接離自在な一対の接点′［
＆（”５３ｂ）を備え、且つ一対の接点電極（Ｊ　ａ　
＃　３　ｂ）間、に生じるアークに該アークと平行な磁
界を印加せしめるコイルｋ　ｊｐｔｒ＋えて成る真空イ
ンタラプタに２いて、前記接点−極（Ｊ　ａ　、ｊ　ｂ
）が内部に螺線状の溝（ｊ４）？ｆ−備えて構成さｆ’
したことを特徴とする真空インタラゲタの％極。A pair of contacts ′[
&("53b), and a pair of contact electrodes (J a
#3b) A vacuum interrupter consisting of a coil kjptr+ which applies a magnetic field parallel to the arc generated between the contacts and the contact poles (J a , j b
) has a spiral groove inside (j4)? f - constructed with f'
% pole of the vacuum interrogator, which is characterized by the following.