JPH056618U - High pressure air switch - Google Patents
High pressure air switchInfo
- Publication number
- JPH056618U JPH056618U JP5994391U JP5994391U JPH056618U JP H056618 U JPH056618 U JP H056618U JP 5994391 U JP5994391 U JP 5994391U JP 5994391 U JP5994391 U JP 5994391U JP H056618 U JPH056618 U JP H056618U
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- JP
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- Prior art keywords
- arc
- arc extinguishing
- fixed mold
- extinguishing cylinder
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
(57)【要約】
【目的】 高圧気中開閉器において、先行アークによる
炭化物や金属粉が絶縁物表面に付着しにくい構造として
先行アーク時間の長期化を防ぎ、投入回数の増加を図
る。また、可動接触子から接地側のシールド電極に至る
経路の閃絡事故を防止する。
【構成】 消弧筒１１の固定接触子８側の下端部外周面
に複数のひだ部１７を形成し、ひだ部１７の外周面と固
定モールド部６の内面との間に隙間ｄを保有させる。先
行アークにより発生する炭化物等は、ひだ部１７相互間
のひだ凹部１８に付着しにくくなり、可動接触子１０か
ら消弧筒１１の下端面及び固定モールド部６の内面を経
てシールド電極９に至る閃絡電路は形成されない。従っ
て、開閉器投入時の先行アーク時間を一定に保つことが
でき、投入回数が増加する。
(57) [Summary] [Purpose] In a high-pressure air switch, a structure in which carbides and metal powders due to the preceding arc are unlikely to adhere to the surface of the insulator prevents the lengthening of the preceding arc time and increases the number of times of application. Further, a flashover accident on the path from the movable contactor to the ground side shield electrode is prevented. [Structure] A plurality of pleats 17 are formed on the outer peripheral surface of the lower end portion of the arc extinguishing cylinder 11 on the fixed contact 8 side, and a gap d is held between the outer peripheral surface of the fold 17 and the inner surface of the fixed mold portion 6. . Carbides and the like generated by the preceding arc are less likely to adhere to the pleated recesses 18 between the folds 17, and reach the shield electrode 9 from the movable contact 10 through the lower end surface of the arc extinguishing cylinder 11 and the inner surface of the fixed mold portion 6. No flash circuit is formed. Therefore, the preceding arc time when the switch is turned on can be kept constant, and the number of turns is increased.
Description
【０００１】[0001]
本考案は、高圧受電設備等に使用される高圧気中開閉器に関し、詳しくは開閉 電極部に内蔵される消弧筒の構造を改良した高圧気中開閉器に関する。 The present invention relates to a high-pressure air switch used in high-voltage power receiving equipment and the like, and more particularly to a high-pressure air switch with an improved arc extinguishing cylinder structure incorporated in a switching electrode section.
【０００２】[0002]
図７は、従来の高圧気中開閉器の内部構造の一例を示している。図において、 １はケーシング、２は操作用のレバー、３はリンク機構、４はリンク機構３の最 終段の駆動ロッド、５′は、後述するように固定接触子８、シールド電極９、可 動接触子１０、消弧筒１１′、消弧筒押え１２′、消弧棒１３等が内蔵された開 閉電極部である。 FIG. 7 shows an example of the internal structure of a conventional high-pressure air switch. In the figure, 1 is a casing, 2 is an operating lever, 3 is a link mechanism, 4 is a drive rod at the final stage of the link mechanism 3, and 5'is a fixed contactor 8, a shield electrode 9 and a shield electrode 9 as will be described later. It is an open / closed electrode part in which a dynamic contact 10, an arc extinguishing cylinder 11 ', an arc extinguishing cylinder retainer 12', an arc extinguishing rod 13 and the like are incorporated.
【０００３】 開閉電極部５′は、樹脂モールドされた円筒状の固定モールド部６と、その外 側に配置された可動モールド部７とを備えている。固定モールド部６の内部には ほぼ円筒状の固定接触子８が取り付けられ、その周囲にはシールド電極９が配置 されている。また、固定接触子８の中心部上方には円筒状の可動接触子１０が可 動モールド部７と一体的に配置されており、駆動ロッド４により可動モールド部 ７が上下動すると可動接触子１０が上下動し、固定接触子８との間で接触、開放 動作するように構成されている。The open / close electrode section 5 ′ includes a resin-molded cylindrical fixed mold section 6 and a movable mold section 7 arranged on the outer side thereof. A substantially cylindrical fixed contact 8 is attached inside the fixed mold portion 6, and a shield electrode 9 is arranged around the fixed contact 8. Further, a cylindrical movable contact 10 is integrally arranged with the movable mold part 7 above the center of the fixed contact 8, and when the movable mold part 7 is vertically moved by the drive rod 4, the movable contact 10 is moved. Are moved up and down to make contact with and release operations from the fixed contactor 8.
【０００４】 更に、可動接触子１０の外側には、ほぼ円筒状の消弧筒１１′が同心状に配置 されており、その上端部は消弧筒押え１２′によって押圧、固定されている。こ こで、消弧筒１１′は、周知のように電流遮断時や投入時に発生するアークを冷 却し、アークの導電率を低下させて消弧するためのものである。Further, an arc-extinguishing cylinder 11 ′ having a substantially cylindrical shape is concentrically arranged outside the movable contact 10, and an upper end portion thereof is pressed and fixed by an arc-extinguishing cylinder retainer 12 ′. Here, as is well known, the arc extinguishing cylinder 11 'is for extinguishing the arc generated when the current is interrupted or turned on by cooling and reducing the conductivity of the arc.
【０００５】 上述のように構成された従来の高圧気中開閉器では、レバー２を手動操作する ことにより、空気中において固定接触子８及び可動接触子１０を接触、開放し、 高圧大電流の投入及び負荷電流の開閉を行なうと共に、これに伴って両接触子８ ，１０間に発生するアークを消弧筒１１′の作用により消弧させている。 ここで、図８は開閉器投入時において両接触子８，１０が接近した場合を拡大 して示したものであり、両接触子８，１０間の電位差を１０等分する９本の等電 位線ｅを一点鎖線により重ねて図示してある。なお、図８において、６ａは固定 モールド部６の内面、１１ａ′は消弧筒１１′の下端面を示す。In the conventional high-pressure air switch configured as described above, by manually operating the lever 2, the fixed contact 8 and the movable contact 10 are brought into contact with and released from the air, and a high-voltage large-current The arc is generated and the load current is opened and closed, and the arc generated between the contacts 8 and 10 is extinguished by the action of the arc extinguishing cylinder 11 '. Here, FIG. 8 is an enlarged view showing a case where the two contacts 8 and 10 approach each other when the switch is turned on. The nine isoelectric lines divide the potential difference between the two contacts 8 and 10 into 10 equal parts. The position line e is shown by being overlapped by a one-dot chain line. In FIG. 8, 6a indicates the inner surface of the fixed mold portion 6 and 11a 'indicates the lower end surface of the arc extinguishing cylinder 11'.
【０００６】[0006]
従来の高圧気中開閉器では、投入時や遮断時、特に投入時に先行アークにより 発生する炭化物や金属粉（以下、不純物という）が絶縁物である固定モールド部 ６の内面６ａや消弧筒１１′の下端面１１ａ′等に付着し、これらの表面を汚損 することがある。上記付着物は投入回数が増加するほど多量かつ広範囲になるた め、先行アーク時間は投入回数の増加に伴って長期化し、これにより投入性能が 低下して結果的に投入回数の低下を招くという問題があった。 また、上記付着物の存在により、投入時に可動接触子１０→消弧筒１１′の下 端面１１ａ′→固定モールド部６の内面６ａ→シールド電極９の経路で閃絡電路 が形成されてしまい、これが先行アーク時間の長期化、投入回数や信頼性の低下 を一層助長していた。 In the conventional high-pressure air switch, carbide or metal powder (hereinafter referred to as impurities) generated by the preceding arc at the time of making or shutting down, particularly at making, is an insulator, and is the inner surface 6a of the fixed mold part 6 or the arc extinguishing cylinder 11 It may adhere to the lower end surface 11a 'of the ′' and the like to contaminate these surfaces. Since the amount of the above-mentioned deposits becomes larger and wider as the number of times of charging increases, the leading arc time becomes longer as the number of times of charging increases, which deteriorates the charging performance and consequently the number of times of charging. There was a problem. Further, due to the presence of the above-mentioned deposit, a flashover electric path is formed in the path of the movable contact 10 → the lower end surface 11a ′ of the arc extinguishing cylinder 11 ′ → the inner surface 6a of the fixed mold portion 6 → the shield electrode 9 at the time of charging, This further contributed to the extension of the leading arc time, the decrease in the number of times of charging and the decrease in reliability.
【０００７】 上述したような不都合を解消するには、レバー２の操作による投入速度を速く して先行アーク時間を短縮したり、固定モールド部６の内面６ａを各接触子８， １０の接触部から遠ざけるように十分な空間を確保する等の方法が考えられるが 、操作上の不便や開閉器全体の大形化を招くという新たな問題を生じることにな る。 本考案は上記問題点を解決するためになされたもので、その目的とするところ は、操作上の不便や開閉器の大形化を招くことなく、不純物の付着によっても閃 絡電路が形成されない構造として、先行アーク時間の長期化を防ぎ、投入回数の 増加を可能にした構成簡単な高圧気中開閉器を提供することにある。In order to solve the above-mentioned inconvenience, the closing speed by operating the lever 2 is increased to shorten the preceding arc time, or the inner surface 6a of the fixed mold portion 6 is connected to the contact portions of the contacts 8, 10. Although it is conceivable to secure sufficient space so that the switch can be kept away from it, this creates new problems such as inconvenience in operation and the overall size of the switch. The present invention has been made to solve the above problems, and its purpose is to prevent the inconvenience in operation and the size of the switch from becoming large, and to prevent the formation of a flash circuit even by the attachment of impurities. As a structure, it is to provide a high-pressure air switch with a simple structure that can prevent the prolongation of the preceding arc time and increase the number of times of charging.
【０００８】[0008]
【課題を解決するための手段】 上記目的を達成するため、本考案は、可動接触子と、移動した可動接触子に接 触する固定接触子と、可動接触子の外側かつ固定モールド部の内側に配置されて 両接触子間に発生するアークを除去するための消弧筒とを有する開閉電極部を備 えた高圧気中開閉器において、消弧筒の固定接触子側端部の外周面にひだ部を周 設すると共に、このひだ部外周面と前記固定モールド部との間に隙間を保有させ たものである。In order to achieve the above object, the present invention provides a movable contact, a fixed contact that contacts the moved movable contact, an outside of the movable contact and an inside of the fixed mold part. In a high-pressure air switch equipped with an open / close electrode section that has an arc extinguishing tube for removing the arc generated between the two contacts located on the outer surface of the arc extinguishing tube on the fixed contact side end. The folds are provided around and a gap is held between the outer peripheral surface of the folds and the fixed mold part.
【０００９】[0009]
本考案によれば、先行アークに伴い発生する導電性の不純物は、消弧筒のひだ 部相互間に形成されるひだ凹部に付着しにくいため、可動接触子から付着物を介 してシールド電極に至る閃絡電路は形成されない。これによって先行アーク時間 の長期化が防止され、投入回数の増加が可能になる。 According to the present invention, the conductive impurities generated by the preceding arc do not easily adhere to the pleated recess formed between the folds of the arc extinguishing cylinder, so that the shield electrode is attached from the movable contact through the attached matter. No flash circuit is formed. As a result, it is possible to prevent the leading arc time from being lengthened and to increase the number of injections.
【００１０】[0010]
以下、図に沿って本考案の実施例を説明する。図１はこの実施例における開閉 電極部５の主要部を一部切り欠いて示した正面図である。この実施例において、 図７と異なるのは主として消弧筒１１の構造のみであるため、他の構成部材につ いては同一の番号を付して詳述を省略する。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a main portion of the open / close electrode portion 5 in this embodiment with a part thereof cut away. In this embodiment, what is different from FIG. 7 is mainly the structure of the arc-extinguishing cylinder 11, and therefore the other components are given the same numbers and their detailed description is omitted.
【００１１】 図２ないし図５は、図１における消弧筒１１を詳しく示したもので、図２は正 面図、図３は平面図、図４は図３のＡ−Ａ断面図、図５は底面図である。これら の各図及び前記図１を参照しつつ消弧筒１１の構造を以下に説明する。 本実施例における消弧筒１１は、各々外径が異なり、内径が同一である上部円 筒部１４、中央円筒部１５及び下部円筒部１６を同軸上に形成し、上部円筒部１ ４及び中央円筒部１５の外周面に位置決め用突起１４ａ，１５ａ，１５ｂをそれ ぞれ適宜な間隔をおいて複数形成すると共に、下部円筒部１６の外周面に円環状 のひだ部１７を複数周設して一体的に構成されている。2 to 5 show the arc-extinguishing cylinder 11 in FIG. 1 in detail. FIG. 2 is a front view, FIG. 3 is a plan view, and FIG. 4 is a sectional view taken along line AA of FIG. 5 is a bottom view. The structure of the arc-extinguishing cylinder 11 will be described below with reference to these drawings and FIG. The arc-extinguishing cylinder 11 according to the present embodiment has an upper cylinder portion 14, a central cylinder portion 15 and a lower cylinder portion 16 which have different outer diameters and the same inner diameter, which are coaxially formed. A plurality of positioning protrusions 14a, 15a, 15b are formed on the outer peripheral surface of the cylindrical portion 15 at appropriate intervals, respectively, and a plurality of annular folds 17 are provided on the outer peripheral surface of the lower cylindrical portion 16. It is constructed integrally.
【００１２】 ここで、中央円筒部１５の突起１５ｂは正面から見てほぼ逆台形状に形成され ていると共に、十分な高さを有しており、突起１５ｂの側面とひだ部１７の外周 面との距離ｄ′を十分に長くとることによって、固定モールド部６の内面６ａと ひだ部１７の外周面との隙間ｄを十分に確保するように配慮されている。 また、ひだ部１７の相互間、及び最上段のひだ部１７と中央円筒部１５との間 には、ひだ凹部１８がそれぞれ形成される。Here, the projection 15b of the central cylindrical portion 15 is formed in a substantially inverted trapezoidal shape when viewed from the front and has a sufficient height, and the side surface of the projection 15b and the outer peripheral surface of the fold portion 17 are formed. By taking a sufficiently long distance d ′ between the inner surface 6a of the fixed mold portion 6 and the outer peripheral surface of the fold portion 17, it is ensured that a sufficient distance d ′ is secured. Further, pleated recesses 18 are formed between the pleated portions 17 and between the uppermost pleated portion 17 and the central cylindrical portion 15, respectively.
【００１３】 こうして形成された消弧筒１１は、図１に示すように、可動接触子１０の外側 に装着され、リング状の消弧筒押え１２を固定モールド部６の上端部内面にねじ 止めすることにより、固定される。このとき、消弧筒１１の突起１４ａは消弧筒 押え１２の内面に係合しており、また、突起１５ｂの下端面は、固定モールド部 ６の内面６ａに形成された段部６ｂ（後述する図６参照）に係止している。 更に、この状態で、消弧筒１１のひだ部１７外周面と固定モールド部６の内面 ６ａとの間には、隙間ｄが保有されている。The arc-extinguishing cylinder 11 thus formed is attached to the outside of the movable contact 10 as shown in FIG. 1, and the ring-shaped arc-extinguishing cylinder presser 12 is screwed to the inner surface of the upper end of the fixed mold portion 6. It is fixed by doing. At this time, the projection 14a of the arc extinguishing cylinder 11 is engaged with the inner surface of the arc extinguishing cylinder retainer 12, and the lower end surface of the projection 15b has a stepped portion 6b (described later) formed on the inner surface 6a of the fixed mold portion 6. 6)). Further, in this state, a gap d is held between the outer peripheral surface of the fold portion 17 of the arc extinguishing cylinder 11 and the inner surface 6a of the fixed mold portion 6.
【００１４】 また、消弧筒１１は中央円筒部１５の周囲４ヵ所に形成された突起１５ｂのみ によって固定モールド部６の段部６ｂに係止しているため、これらの突起１５ｂ の相互の間隙を介して、図１に示すように、隙間ｄを含むひだ部１７周囲の空間 Ｓ1と、固定モールド部６の内周面及び中央円筒部１５の外周面に包囲された空 間Ｓ2とが連通している。更に、上方の突起１５ａも中央円筒部１５の周囲４ヵ 所のみに形成されており、かつ突起１５ａと固定モールド部６の内周面との間に は隙間が保有されていると共に、上部円筒部１４の突起１４ａも周囲４ヵ所のみ に形成されていて上部円筒部１４の外径が消弧筒押え１２の内径よりも短いため 、上記空間Ｓ2及び固定モールド部６の上方の空間Ｓ3も互いに連通している。Further, since the arc-extinguishing cylinder 11 is locked to the stepped portion 6b of the fixed mold portion 6 only by the projections 15b formed at four places around the central cylindrical portion 15, the gaps between these projections 15b are mutually. through, as shown in FIG. 1, a space S 1 of the peripheral corrugation 17 including the gap d, the spatial S 2 surrounded on the outer peripheral surface of the inner peripheral surface and a central cylindrical portion 15 of the fixed mold part 6 Are in communication. Further, the upper protrusions 15a are also formed only at four locations around the central cylindrical portion 15, and there is a gap between the protrusion 15a and the inner peripheral surface of the fixed mold portion 6, and the upper cylindrical portion Since the projections 14a of the portion 14 are also formed only at four peripheral portions and the outer diameter of the upper cylindrical portion 14 is shorter than the inner diameter of the arc-extinguishing tube retainer 12, the space S 2 and the space S 3 above the fixed mold portion 6 are formed. Also communicate with each other.
【００１５】 次に、この実施例の作用を図６を参照しつつ説明する。 まず、投入時には、前記同様にレバーの操作により駆動ロッド４が作動して可 動モールド部７が下方に移動し、可動接触子１０を固定接触子８の内面に接触さ せる。この際、本実施例ではひだ部１７の外周面と固定モールド部６の内面６ａ との間に隙間ｄが形成されているため、両接触子８，１０間の等電位線ｅは図６ に一点鎖線で示すようになる。なお、図６に示した等電位線ｅも、両接触子８， １０間の電位差を１０等分したものである。 すなわち、等電位線ｅは隙間ｄを避けるようにして消弧筒１１及び固定モール ド部６を通るようになり、隙間ｄをはさんで隣合う等電位線ｅの間隔が図８に比 べて広がり、この分、等電位線ｅの間の抵抗が増加する。Next, the operation of this embodiment will be described with reference to FIG. First, at the time of closing, the drive rod 4 is actuated by operating the lever in the same manner as described above, the movable mold part 7 is moved downward, and the movable contact 10 is brought into contact with the inner surface of the fixed contact 8. At this time, in this embodiment, since the gap d is formed between the outer peripheral surface of the fold portion 17 and the inner surface 6a of the fixed mold portion 6, the equipotential line e between the contacts 8 and 10 is shown in FIG. It becomes as shown by the one-dot chain line. The equipotential line e shown in FIG. 6 is also obtained by dividing the potential difference between the contacts 8 and 10 into 10 equal parts. That is, the equipotential lines e pass through the arc extinguishing cylinder 11 and the fixed mold portion 6 so as to avoid the gap d, and the gap between the equipotential lines e adjacent to each other across the gap d is smaller than that in FIG. And the resistance between the equipotential lines e increases accordingly.
【００１６】 また、消弧筒１１は複数のひだ部１７を有し、各ひだ部１７の間にはひだ凹部 １８が形成されているから、先行アークによって導電性の不純物が発生してもこ れらがひだ凹部１８に付着しにくい構造となっている。 このため、ひだ凹部１８に不純物によって１ヵ所でも汚損されない健全部が存 在すれば、可動接触子１０→消弧筒１１の下端面１１ｂ→固定モールド部６の内 面６ａ→シールド電極９の経路の閃絡電路が形成されない。Further, since the arc extinguishing cylinder 11 has a plurality of pleats 17 and pleats 18 are formed between the folds 17, conductive impurities may be generated by the preceding arc. The structure is such that the rust does not easily adhere to the pleated recess 18. Therefore, if there is a sound part in the pleated concavity 18 that is not contaminated by impurities even at one place, the movable contact 10 → the lower end surface 11b of the arc extinguishing cylinder 11 → the inner surface 6a of the fixed mold part 6 → the path of the shield electrode 9 No flash circuit is formed.
【００１７】 これにより、消弧筒１１の下端面１１ｂと固定接触子８との間のギャップｇを 常規大地電圧値で閃絡しないような十分な長さに設定しておけば、投入時の先行 アーク時間を一定に保つことができ、開閉器の投入回数を従来よりも増加させる ことができる。ここで、上記ギャップｇの長さは消弧筒１１の消弧能力を損なわ ない範囲で設定することが必要である。Accordingly, if the gap g between the lower end surface 11b of the arc-extinguishing cylinder 11 and the fixed contact 8 is set to a sufficient length so as not to be flashed at the normal ground voltage value, the The leading arc time can be kept constant, and the number of times the switch is closed can be increased more than before. Here, it is necessary to set the length of the gap g within a range that does not impair the arc extinguishing ability of the arc extinguishing cylinder 11.
【００１８】 更に、図７及び図８に示した従来例では、特に図８に示すように消弧筒１１′ 側の段部１１ｃ′が全周にわたって円筒状に形成され、この段部１１ｃ′が固定 モールド部６側の段部６ｂに載置される構造となっているため、図８における空 間Ｓ1は隔離されている。 このため、従来では、アークによって生じる導電性の不純物を含んだガスが空 間Ｓ1から上方へ抜けられず、不純物が空間Ｓ1に浮遊して最終的には固定モール ド部６の内面６ａや消弧筒１１′の下端面１１ａ′に付着して閃絡を起こす危険 がある。Further, in the conventional example shown in FIG. 7 and FIG. 8, in particular, as shown in FIG. 8, the step portion 11c 'on the arc extinguishing cylinder 11' side is formed in a cylindrical shape over the entire circumference, and this step portion 11c 'is formed. Since the structure is mounted on the step 6b on the side of the fixed mold 6, the space S 1 in FIG. 8 is isolated. Therefore, conventionally, no gas containing conductive impurities caused by arcing is missing from the spatial S 1 upward, eventually impurities floating in the space S 1 is the inner surface 6a of the fixed molding de 6 Also, there is a risk that the arc may adhere to the lower end surface 11a 'of the arc extinguishing cylinder 11' to cause a flashover.
【００１９】 一方、本実施例では、前述したように図１の空間Ｓ1，Ｓ2，Ｓ3がすべて連通 している。従って、不純物を含むガスは空間Ｓ1→Ｓ2→Ｓ3の経路で固定モール ド部１６の上方へ逃げるため、絶縁物表面の汚損を遅延させる利点がある。これ により、ひだ凹部１８が汚損されない健全部として維持されるのを一層助長する ことができる。On the other hand, in the present embodiment, as described above, the spaces S 1 , S 2 , S 3 of FIG. 1 are all in communication. Therefore, the gas containing impurities escapes above the fixed mold portion 16 along the path of the space S 1 → S 2 → S 3 , which has the advantage of delaying the contamination of the surface of the insulator. As a result, it is possible to further promote that the pleated concave portion 18 is maintained as a sound portion that is not contaminated.
【００２０】 また、前述のごとく突起１５ｂは正面から見て逆台形状に形成されているから 、アークに伴って発生するガスは図２に矢印ａで示すように流れ、流路抵抗が少 ないためにガスをスムーズに上方へ逃がすことができる。 同時に、突起１５ｂの下端面の面積は極めて小さく、しかも４つの突起１５ｂ の下端面のみによって消弧筒１１と固定モールド部１６とが接触する構造である から、従来のように段部１１ｃ′及び６ｂの全周にわたって消弧筒１１′と固定 モールド部１６とが接触する構造に比べ、沿面放電経路が生成される確率を大幅 に小さくすることができる。Further, as described above, since the projection 15b is formed in an inverted trapezoidal shape when viewed from the front, the gas generated by the arc flows as shown by an arrow a in FIG. 2 and the flow path resistance is small. Therefore, the gas can be smoothly released upward. At the same time, the area of the lower end surface of the protrusion 15b is extremely small, and the arc extinguishing cylinder 11 and the fixed mold portion 16 are in contact with each other only by the lower end surfaces of the four protrusions 15b. Compared with the structure in which the arc extinguishing cylinder 11 'and the fixed mold part 16 are in contact with each other over the entire circumference of 6b, the probability that a creeping discharge path is generated can be greatly reduced.
【００２１】 また、突起１５ｂと固定モールド部１６の内面１６ａとの径差、及び、突起１ ４ａと消弧筒押え１２の内面との径差を極力小さくすることで、消弧筒１１の傾 きを防止し、消弧筒１１の下端面１１ａとシールド電極９間の経路による閃絡を 防止することができる。 これに加えて、図２、図３から明らかなように、消弧筒１１の平面から見て突 起１４ａ，１５ｂを互いに４５°ずつずらして形成することにより、消弧筒１１ の傾きを最小限度に抑えることができ、上記経路による閃絡防止に一層効果的で ある。Further, by minimizing the diameter difference between the protrusion 15b and the inner surface 16a of the fixed mold portion 16 and the diameter difference between the protrusion 14a and the inner surface of the arc extinguishing tube retainer 12, the inclination of the arc extinguishing tube 11 is reduced. It is possible to prevent the electric shock and to prevent the flashover due to the path between the lower end surface 11a of the arc extinguishing cylinder 11 and the shield electrode 9. In addition to this, as apparent from FIGS. 2 and 3, the protrusions 14a and 15b are formed so as to be offset from each other by 45 ° when viewed from the plane of the arc extinguishing cylinder 11, so that the inclination of the arc extinguishing cylinder 11 is minimized. It can be suppressed to the limit and it is more effective in preventing flashover by the above route.
【００２２】 以上のように本実施例によれば、消弧筒１１の構造やこれに関連した固定モー ルド部１６への固定手段等を改良することにより、従来よりも投入性能を一層向 上させることができる。 なお、実施例として説明した各接触子８，１０や消弧筒１１の構造はあくまで 例示的なものであり、本考案は他の構造の高圧気中開閉器にも勿論適用可能であ る。また、開閉器の操作方式としては、手動のみならず自動操作方式であっても よい。As described above, according to the present embodiment, by improving the structure of the arc extinguishing cylinder 11 and the fixing means related to the arc extinguishing cylinder 11 and the like, the throwing performance is further improved as compared with the conventional case. Can be made The structure of each of the contacts 8 and 10 and the arc extinguishing cylinder 11 described as an embodiment is merely an example, and the present invention can be applied to high-pressure air switches having other structures. Further, the operation method of the switch may be not only manual operation but also automatic operation method.
【００２３】[0023]
以上述べたように本考案によれば、消弧筒の固定接触子側端部の外周面にひだ 部を形成し、かつ、このひだ部の外周面と固定モールド部内面との間に隙間を保 有させたことにより、先行アークに伴い発生する導電性の不純物が一部のひだ凹 部や固定接触子周囲の絶縁物表面に付着し汚損されても閃絡電路が形成されない ため、先行アーク時間の長期化を防ぐことにより投入回数を増加させ、投入性能 を向上させることができる。 As described above, according to the present invention, a fold is formed on the outer peripheral surface of the fixed contact side end of the arc extinguishing cylinder, and a gap is formed between the outer peripheral surface of the fold and the inner surface of the fixed mold portion. Since the conductive arc generated by the preceding arc adheres to some of the pleated recesses and the surface of the insulator around the fixed contact and is contaminated, the flashover electric circuit is not formed. By preventing the time from being prolonged, the number of times of injection can be increased and the injection performance can be improved.
【図１】本考案の一実施例における主要部の一部を切り
欠いて示した正面図である。FIG. 1 is a front view showing a notched part of a main part in an embodiment of the present invention.
【図２】消弧筒の正面図である。FIG. 2 is a front view of an arc extinguishing cylinder.
【図３】消弧筒の平面図である。FIG. 3 is a plan view of an arc extinguishing cylinder.
【図４】図３のＡ−Ａ線断面図である。4 is a cross-sectional view taken along the line AA of FIG.
【図５】消弧筒の底面図である。FIG. 5 is a bottom view of an arc extinguishing cylinder.
【図６】投入時の等電位線を示す主要部の断面図であ
る。FIG. 6 is a sectional view of a main part showing equipotential lines at the time of charging.
【図７】従来の技術を説明するための高圧気中開閉器の
内部構造の説明図である。FIG. 7 is an explanatory diagram of an internal structure of a high-pressure air switch for explaining a conventional technique.
【図８】従来の技術における投入時の等電位線を示す主
要部の断面図である。FIG. 8 is a cross-sectional view of a main part showing equipotential lines at the time of closing in the conventional technique.
【符号の説明】 ５ 開閉電極部 ６ 固定モールド部 ６ａ 内面 ６ｂ 段部 ７ 可動モールド部 ８ 固定接触子 ９ シールド電極 １０ 可動接触子 １１ 消弧筒 １１ｂ 下端面 １２ 消弧筒押え １３ 消弧棒 １４ 上部円筒部 １４ａ，１５ａ，１５ｂ 位置決め用突起 １５ 中央円筒部 １６ 下部円筒部 １７ ひだ部 １８ ひだ凹部 ｄ 隙間 ｅ 等電位線 ｇ ギャップ Ｓ1，Ｓ2，Ｓ3 空間[Explanation of symbols] 5 open / close electrode section 6 fixed mold section 6a inner surface 6b step section 7 movable mold section 8 fixed contactor 9 shield electrode 10 movable contactor 11 extinguishing tube 11b lower end surface 12 extinguishing tube retainer 13 extinguishing rod 14 Upper cylindrical part 14a, 15a, 15b Positioning projection 15 Central cylindrical part 16 Lower cylindrical part 17 Ruffled part 18 Ruffled recess d Gap e Equipotential line g Gap S 1 , S 2 , S 3 space
Claims (1)
触する固定接触子と、可動接触子の外側かつ固定モール
ド部の内側に配置されて両接触子間に発生するアークを
除去するための消弧筒とを有する開閉電極部を備えた高
圧気中開閉器において、 消弧筒の固定接触子側端部の外周面にひだ部を周設する
と共に、このひだ部外周面と前記固定モールド部との間
に隙間を保有させたことを特徴とする高圧気中開閉器。[Claims for utility model registration] Claims: 1. A movable contact, a fixed contact that contacts the moved movable contact, and a contact between the movable contact and an outer side of the movable contact and an inner side of the fixed mold. In a high-pressure air switch equipped with an opening / closing electrode section having an arc extinguishing tube for removing an arc generated in the arc extinguishing section, a fold portion is provided around the outer peripheral surface of the fixed contact side end of the arc extinguishing tube A high-pressure air switch, characterized in that a gap is held between the outer peripheral surface of the fold portion and the fixed mold portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991059943U JP2513738Y2 (en) | 1991-07-04 | 1991-07-04 | High pressure air switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991059943U JP2513738Y2 (en) | 1991-07-04 | 1991-07-04 | High pressure air switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH056618U true JPH056618U (en) | 1993-01-29 |
| JP2513738Y2 JP2513738Y2 (en) | 1996-10-09 |
Family
ID=13127737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991059943U Expired - Lifetime JP2513738Y2 (en) | 1991-07-04 | 1991-07-04 | High pressure air switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2513738Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5799338U (en) * | 1980-12-10 | 1982-06-18 |
-
1991
- 1991-07-04 JP JP1991059943U patent/JP2513738Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5799338U (en) * | 1980-12-10 | 1982-06-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2513738Y2 (en) | 1996-10-09 |
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