JP5440485B2 - Puffer type gas circuit breaker - Google Patents

Puffer type gas circuit breaker Download PDF

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JP5440485B2
JP5440485B2 JP2010280345A JP2010280345A JP5440485B2 JP 5440485 B2 JP5440485 B2 JP 5440485B2 JP 2010280345 A JP2010280345 A JP 2010280345A JP 2010280345 A JP2010280345 A JP 2010280345A JP 5440485 B2 JP5440485 B2 JP 5440485B2
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puffer
insulating
insulating cover
arc
contact
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JP2012129091A (en
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数与 笹沼
英昭 内山
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Hitachi Ltd
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Description

本発明は、消弧性ガスとしてＳＦ６ガスが用いられている電力用のガス遮断器、特に、その消弧部分の絶縁ノズルと絶縁カバーの構成に関する。   The present invention relates to a gas circuit breaker for electric power in which SF 6 gas is used as an arc extinguishing gas, and more particularly to the configuration of an insulating nozzle and an insulating cover in the arc extinguishing portion.

パッファ形ガス遮断器は、一般的に絶縁ノズルと絶縁カバーを備えている。絶縁カバーは筒状をなし、絶縁ノズルの内径側でアーク接触子間に発生するアークに消弧性ガスを効果的に吹き付けることを目的として設けられている。   A puffer type gas circuit breaker generally includes an insulating nozzle and an insulating cover. The insulating cover has a cylindrical shape, and is provided for the purpose of effectively blowing an arc extinguishing gas to an arc generated between the arc contacts on the inner diameter side of the insulating nozzle.

特許文献１には、図６に示すとおり、絶縁ノズルの取付け固定部と、絶縁カバーの根元部から放射状に伸びた足部とを挟み込んでパッファシリンダに圧縮固定することで絶縁ノズル内の気密性を高め、遮断性能の向上を図ることを目的とするパッファ形ガス遮断器が開示されている。   In Patent Document 1, as shown in FIG. 6, the airtightness in the insulating nozzle is fixed by compressing and fixing to the puffer cylinder by sandwiching the mounting and fixing portion of the insulating nozzle and the foot portion extending radially from the base portion of the insulating cover. A puffer-type gas circuit breaker that aims to improve the shutoff performance by increasing the pressure is disclosed.

しかし、この構成では、ボルト１１２をパッファシリンダ１０６に固定し、カバー１１０の凹部１１０ｃとボルト１１２を一致させることにより位置決めをしなければならない。このため、位置決め公差を考慮して製造しなければならないので作業性が悪いという問題があった。   However, in this configuration, the bolt 112 must be fixed to the puffer cylinder 106, and positioning must be performed by matching the recess 110c of the cover 110 with the bolt 112. For this reason, there is a problem in that workability is poor because it must be manufactured in consideration of positioning tolerances.

また、絶縁ノズル１０９とパッファシリンダ１０６の接合部の気密を確保しつつ、カバー１１０の足部１１０ａを絶縁ノズル１０９とパッファシリンダ１０６の間に密着させてしっかり固定しなければならず作業に慎重を要するという問題点があった。   In addition, while ensuring the airtightness of the joint between the insulating nozzle 109 and the puffer cylinder 106, the foot 110a of the cover 110 must be brought into close contact between the insulating nozzle 109 and the puffer cylinder 106, and must be fixed firmly. There was a problem that it took.

特開平８−１１１１５１公報Japanese Patent Laid-Open No. 8-111151

そこで、本発明は上記の問題点に鑑み、取付け作業が容易な絶縁ノズル及び絶縁カバーを提供することを目的とする。   In view of the above problems, an object of the present invention is to provide an insulating nozzle and an insulating cover that can be easily attached.

本発明によるパッファ形ガス遮断器は、消弧性ガスで充填されたタンク内に、相対的に開離可能な一対の固定側アーク接触子と可動側アーク接触子からなる接触子と、前記可動側アーク接触子を先端に結合する可動パッファシリンダと固定ピストンで形成されたパッファ室と、前記可動側アーク接触子を包囲して前記パッファシリンダの先端に取付けられた絶縁カバーと、前記絶縁カバーを包囲して前記パッファシリンダの先端に取付けられた前記パッファ室からの消弧性ガスを前記接触子に導くための流路を形成する絶縁ノズルとが設けられ、前記接触子の開離動作に関連して前記パッファ室内の消弧性ガスを圧縮して前記接触子間に発生するアークに吹き付けるようにしたうえで、前記絶縁カバーはガス流路を有し、軸方向の両端を前記パッファシリンダの先端と前記絶縁ノズルの間に支持されることを特徴としている。   The puffer-type gas circuit breaker according to the present invention includes a tank filled with an arc extinguishing gas, a contact made up of a pair of fixed-side arc contact and movable-side arc contact that can be relatively separated, and the movable A puffer chamber formed by a movable puffer cylinder and a fixed piston that couple the side arc contact to the tip, an insulating cover that surrounds the movable side arc contact and is attached to the tip of the puffer cylinder, and the insulating cover. An insulating nozzle that surrounds and forms a flow path for guiding the arc extinguishing gas from the puffer chamber attached to the tip of the puffer cylinder to the contact, and is related to the opening operation of the contact Then, after the arc extinguishing gas in the puffer chamber is compressed and sprayed to the arc generated between the contacts, the insulating cover has a gas flow path, and both ends in the axial direction are It is characterized in that the tip of Ffashirinda are supported between the insulating nozzle.

好ましくは、前記カバーはその軸方向の一端がパッファシリンダに遊嵌され、他端が絶縁ノズルに遊嵌され、パッファシリンダと絶縁ノズルの間で回動自在に支持されることを特徴としている。   Preferably, one end of the cover in the axial direction is loosely fitted to the puffer cylinder, and the other end is loosely fitted to the insulating nozzle, and is supported rotatably between the puffer cylinder and the insulating nozzle.

本発明にかかる絶縁カバーを絶縁ノズルとパッファシリンダの間に両持ち梁で支持する構成によれば、引例１に示すように絶縁ノズルとパッファシリンダの接合部に気密を確保しつつ絶縁カバーの端部を挟んで固定する必要がなくなる。このため、絶縁カバーの取付けが容易になり組立作業性が向上する。また、絶縁カバーを絶縁ノズルとパッファシリンダの間で回動自在となるように遊びを設けて支持する構成とすることで、位置決め公差、組立公差等を考慮する必要が低減し組立作業性が向上する。   According to the configuration in which the insulating cover according to the present invention is supported between the insulating nozzle and the puffer cylinder by the doubly supported beam, as shown in Reference 1, the end of the insulating cover is secured while ensuring the airtightness at the joint between the insulating nozzle and the puffer cylinder. There is no need to fix the part between them. For this reason, it is easy to attach the insulating cover and the assembly workability is improved. In addition, since the insulation cover is configured to be supported so as to be rotatable between the insulation nozzle and the puffer cylinder, the need for consideration of positioning tolerances, assembly tolerances, etc. is reduced and assembly workability is improved. To do.

さらに、絶縁カバーを回動自在に支持する構成とすることで消弧性ガスをあらゆる角度からアークに対して吹き付けることができるため、消弧性能を向上することができる。また、遮断動作時に絶縁カバーが回転することで、アークによる消耗が１ヶ所に集中しなくなるため、部品寿命の延長も可能である。   Furthermore, since the arc-extinguishing gas can be blown against the arc from any angle by adopting a configuration in which the insulating cover is rotatably supported, the arc extinguishing performance can be improved. Further, since the insulating cover rotates during the shut-off operation, the consumption due to the arc is not concentrated in one place, so that the life of the parts can be extended.

本発明の絶縁ノズルと絶縁カバーの構成を示す断面部である。It is a cross-sectional part which shows the structure of the insulation nozzle and insulation cover of this invention. 本発明の絶縁ノズルと絶縁カバーを用いて構成したパッファ形ガス遮断器の断面図である。It is sectional drawing of the puffer type | mold gas circuit breaker comprised using the insulating nozzle and insulating cover of this invention. 本発明の第１の実施例にかかる絶縁カバーの正面図及び側面断面図である。It is the front view and side sectional view of an insulating cover concerning the 1st example of the present invention. 本発明の第２の実施例にかかる絶縁カバーの正面図及び側面断面図である。It is the front view and side surface sectional drawing of the insulation cover concerning the 2nd Example of this invention. 本発明の絶縁ノズルと絶縁カバーの組立断面図である。It is assembly sectional drawing of the insulation nozzle and insulation cover of this invention. 従来例を示す図である。It is a figure which shows a prior art example.

以下、本発明にかかるパッファ形ガス遮断器の絶縁ノズル及び絶縁カバーの実施例を図面を用いて説明する。   Embodiments of an insulating nozzle and an insulating cover of a puffer-type gas circuit breaker according to the present invention will be described below with reference to the drawings.

図２において、本発明の絶縁ノズルと絶縁カバーを用いて構成したパッファ形遮断器内部の概要を示す。絶縁ノズルと絶縁カバー以外の構成は従来のパッファ形ガス遮断器の構成と同様である。   In FIG. 2, the outline | summary inside the puffer type circuit breaker comprised using the insulation nozzle and insulation cover of this invention is shown. The configuration other than the insulating nozzle and the insulating cover is the same as the configuration of the conventional puffer type gas circuit breaker.

容器１内にはＳＦ６ガス等の絶縁性ガスが封入され、固定側通電導体２及び可動側通電導体３が引き込まれる。固定側通電導体２は、固定側遮断部１１を構成する固定側アーク接触子７及び固定側主接触子４に電気的に接続されている。可動側通電導体３は、可動側遮断部１２を構成するパッファシリンダ６及び可動側主接触子５に電気的に接続されている。パッファシリンダ６の先端部には絶縁カバー１０及び絶縁ノズル９が設けられる。   Insulating gas such as SF6 gas is sealed in the container 1, and the fixed-side conductive conductor 2 and the movable-side conductive conductor 3 are drawn. The fixed-side conductive conductor 2 is electrically connected to the fixed-side arc contact 7 and the fixed-side main contact 4 that constitute the fixed-side blocking portion 11. The movable-side conductive conductor 3 is electrically connected to the puffer cylinder 6 and the movable-side main contact 5 that constitute the movable-side blocking portion 12. An insulating cover 10 and an insulating nozzle 9 are provided at the tip of the puffer cylinder 6.

図１は、図２のパッファシリンダ６の先端部の拡大図である。パッファシリンダ６の先端部中央には可動側アーク接触子８が設けられる。可動側アーク接触子８の外周にはそれを取巻くように絶縁カバー１０、絶縁ノズル９、及び可動側主接触子５がそれぞれ同心円状に配される。また、絶縁カバー１０は、その軸方向両端部を絶縁ノズル９とパッファシリンダ６の間に両持ち梁で支持される。   FIG. 1 is an enlarged view of the tip of the puffer cylinder 6 of FIG. A movable arc contact 8 is provided at the center of the tip of the puffer cylinder 6. An insulating cover 10, an insulating nozzle 9, and a movable main contact 5 are arranged concentrically around the outer periphery of the movable arc contact 8 so as to surround it. Further, both ends of the insulating cover 10 in the axial direction are supported between the insulating nozzle 9 and the puffer cylinder 6 by a cantilever beam.

図３（Ａ）は絶縁カバー１０の正面図であり、図３（Ｂ）は絶縁カバー１０の側面断面図である。図３（Ａ）（Ｂ）に示すとおり、絶縁カバー１０は円筒状に構成される。図３（Ｂ）に示すとおり、絶縁カバー１０は、環状凸部１０ａと小径部１０ｂを有する。環状凸部１０ａは、絶縁ノズル９に設けられた環状の絶縁カバー嵌合部９ａと嵌合するためのものである。小径部１０ｂは、パッファシリンダ６の絶縁カバー支持部６ａと嵌合するためのものである。   FIG. 3A is a front view of the insulating cover 10, and FIG. 3B is a side sectional view of the insulating cover 10. As shown in FIGS. 3A and 3B, the insulating cover 10 is formed in a cylindrical shape. As shown in FIG. 3B, the insulating cover 10 has an annular convex portion 10a and a small diameter portion 10b. The annular convex portion 10 a is for fitting with an annular insulating cover fitting portion 9 a provided on the insulating nozzle 9. The small diameter portion 10 b is for fitting with the insulating cover support portion 6 a of the puffer cylinder 6.

図５は絶縁カバー１０をパッファシリンダ６と絶縁ノズル９の間に両持ち梁で支持する手順の一例を示している。まず、パッファシリンダ６の先端中央部及び外周部に可動側アーク接触子８及び可動側主接触子５を固着する。パッファシリンダ６と可動側主接触子５とは一体に成形したものであってもよい。   FIG. 5 shows an example of a procedure for supporting the insulating cover 10 between the puffer cylinder 6 and the insulating nozzle 9 with a doubly supported beam. First, the movable-side arc contact 8 and the movable-side main contact 5 are fixed to the center and the outer periphery of the tip of the puffer cylinder 6. The puffer cylinder 6 and the movable main contactor 5 may be integrally formed.

次に、図５（Ａ）（Ｂ）に示すように、絶縁カバーの環状凸部１０ａを絶縁ノズル９の絶縁カバー嵌合部９ａに嵌め合わせる。図５（Ｃ）に示す可動側主接触子５の内周面にはねじ切りが施されており（不図示）、絶縁ノズル９の外周部に設けられたねじ部（不図示）が螺合される。このとき、絶縁カバーの小径部１０ｂが絶縁カバー支持部６ａに嵌合することで、絶縁カバー１０が絶縁ノズル９とパッファシリンダ６の間に支持される。   Next, as shown in FIGS. 5A and 5B, the annular convex portion 10 a of the insulating cover is fitted to the insulating cover fitting portion 9 a of the insulating nozzle 9. The inner peripheral surface of the movable main contact 5 shown in FIG. 5C is threaded (not shown), and a screw portion (not shown) provided on the outer periphery of the insulating nozzle 9 is screwed. The At this time, the insulating cover 10 is supported between the insulating nozzle 9 and the puffer cylinder 6 by fitting the small diameter portion 10 b of the insulating cover into the insulating cover support portion 6 a.

以上のとおり、絶縁カバーの軸方向の両端を絶縁ノズルとパッファシリンダの間に両持ち梁で支持することによって、引例1に示すように絶縁ノズルとパッファシリンダの接合部に気密を確保しつつ絶縁カバーの端部を挟んで固定する必要がなくなる。このため、絶縁カバーの取付けが容易になり組立作業性が向上する。   As described above, by supporting both ends of the insulating cover in the axial direction with a doubly supported beam between the insulating nozzle and the puffer cylinder, the insulating nozzle and the puffer cylinder are insulated while ensuring airtightness as shown in Reference 1. There is no need to fix the cover between the ends. For this reason, it is easy to attach the insulating cover and the assembly workability is improved.

また、環状凸部１０ａと絶縁カバー嵌合部９ａを遊嵌させ、小径部１０ｂと絶縁カバー支持部６ａを遊嵌させる構成とすることで、製造時に絶縁カバー１０と絶縁ノズル９、及び絶縁カバー１０とパッファシリンダ６を容易に嵌め合う構成とすることもできる。こうすることで、絶縁カバー１０を絶縁ノズル９とパッファシリンダ６の間に取付ける際に厳密な位置決めをする必要がなくなり、位置決め公差、組立公差等を考慮する必要が低減するため組立作業性が向上する。   Also, the annular cover 10a and the insulating cover fitting portion 9a are loosely fitted, and the small diameter portion 10b and the insulating cover supporting portion 6a are loosely fitted, so that the insulating cover 10, the insulating nozzle 9, and the insulating cover are manufactured at the time of manufacture. It can also be set as the structure which 10 and the puffer cylinder 6 fit easily. This eliminates the need for precise positioning when the insulating cover 10 is mounted between the insulating nozzle 9 and the puffer cylinder 6 and improves the assembly workability because the necessity of considering positioning tolerances and assembly tolerances is reduced. To do.

以下、本発明の第２の実施形態を図４に基づいて説明する。実施例２の絶縁カバー１０に設けられたガス流路１０ｃはその軸が絶縁カバー１０の軸心から同方向に一定距離ずれるように設けられる。絶縁カバー１０が絶縁ノズル９とパッファシリンダ６の間で回動自在となるよう、絶縁カバーの環状凸部１０ａを絶縁ノズルの絶縁カバー嵌合部９ａに遊嵌させ、絶縁カバーの小径部１０ｂをパッファシリンダの絶縁カバー支持部６ａと遊嵌させる。   Hereinafter, a second embodiment of the present invention will be described with reference to FIG. The gas flow path 10c provided in the insulating cover 10 of the second embodiment is provided such that its axis is deviated from the axis of the insulating cover 10 in the same direction by a certain distance. In order for the insulating cover 10 to be rotatable between the insulating nozzle 9 and the puffer cylinder 6, the annular convex portion 10a of the insulating cover is loosely fitted to the insulating cover fitting portion 9a of the insulating nozzle, and the small diameter portion 10b of the insulating cover is set. The insulating cover supporting portion 6a of the puffer cylinder is loosely fitted.

この構成によって絶縁カバー１０に消弧性ガスが吹きつけられたときに旋回流が生じ、その反力で絶縁カバー１０が回転する。これにより、消弧性ガスがあらゆる角度からアークに対して吹き付けられるため消弧性能を向上することができる。また、遮断動作時に絶縁カバー１０が回転することで、アークによる消耗が１ヶ所に集中しなくなるため、部品寿命の延長も可能である。   With this configuration, when arc-extinguishing gas is blown onto the insulating cover 10, a swirling flow is generated, and the insulating cover 10 rotates by the reaction force. Thereby, since arc-extinguishing gas is sprayed with respect to an arc from all angles, arc-extinguishing performance can be improved. Further, since the insulating cover 10 rotates during the shut-off operation, the consumption due to the arc is not concentrated in one place, so that the life of the parts can be extended.

１ 容器
２ 固定側通電導体
３ 可動側通電導体
４ 固定側主接触子
５ 可動側主接触子
６ パッファシリンダ
６ａ 絶縁カバー支持部
７ 固定側アーク接触子
８ 可動側アーク接触子
９ 絶縁ノズル
９ａ 絶縁カバー嵌合部
１０ 絶縁カバー
１０ａ 環状凸部
１０ｂ 小径部
１０ｃ ガス流路
１１ 固定側遮断部
１２ 可動側遮断部 DESCRIPTION OF SYMBOLS 1 Container 2 Fixed side energization conductor 3 Movable side energization conductor 4 Fixed side main contactor 5 Movable side main contactor 6 Puffer cylinder 6a Insulation cover support part 7 Fixed side arc contactor 8 Movable side arc contactor 9 Insulation nozzle 9a Insulation cover Fitting part 10 Insulating cover 10a Annular convex part 10b Small diameter part 10c Gas flow path 11 Fixed side blocking part 12 Movable side blocking part

Claims (1)

消弧性ガスで充填されたタンク内に、相対的に開離可能な一対の固定側アーク接触子と可動側アーク接触子からなる接触子と、前記可動側アーク接触子を先端に結合するパッファシリンダと固定ピストンで形成されたパッファ室と、前記可動側アーク接触子を包囲して前記パッファシリンダの先端に取付けられた絶縁カバーと、前記絶縁カバーを包囲して前記パッファシリンダの先端に取付けられた前記パッファ室からの消弧性ガスを前記接触子に導くための流路を形成する絶縁ノズルとが設けられ、前記接触子の開離動作に関連して前記パッファ室内の消弧性ガスを圧縮して前記接触子間に発生するアークに吹き付けるようにしたパッファ形ガス遮断器であって、
前記絶縁カバーはガス流路を有し、軸方向の両端を前記パッファシリンダの先端と前記絶縁ノズルの間に支持され、
前記絶縁カバーは、軸方向の一端が前記パッファシリンダに遊嵌され、他端が前記絶縁ノズルに遊嵌され、前記パッファシリンダと前記絶縁ノズルの間で回動自在に支持されることを特徴とするパッファ形ガス遮断器。 In a tank filled with arc-extinguishing gas, a contact comprising a pair of relatively separable fixed-side arc contact and movable-side arc contact, and a puffer coupling the movable-side arc contact to the tip. A puffer chamber formed by a cylinder and a fixed piston, an insulating cover that surrounds the movable arc contact and is attached to the tip of the puffer cylinder, and surrounds the insulating cover and is attached to the tip of the puffer cylinder And an insulating nozzle that forms a flow path for guiding the arc-extinguishing gas from the puffer chamber to the contact, and the arc-extinguishing gas in the puffer chamber is related to the opening operation of the contact. A puffer-type gas circuit breaker that is compressed and blown against an arc generated between the contacts,
The insulating cover has a gas flow path, and both ends in the axial direction are supported between the tip of the puffer cylinder and the insulating nozzle ,
The insulating cover has one axial end loosely fitted to the puffer cylinder, the other end loosely fitted to the insulating nozzle, and is supported rotatably between the puffer cylinder and the insulating nozzle. puffer type gas circuit breaker for.
JP2010280345A 2010-12-16 2010-12-16 Puffer type gas circuit breaker Active JP5440485B2 (en)

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JP2014089899A (en) * 2012-10-31 2014-05-15 Hitachi Ltd Gas circuit breaker
JP6277083B2 (en) * 2014-08-20 2018-02-07 株式会社日立製作所 Gas circuit breaker

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