JP2014131379A - Gas circuit breaker - Google Patents

Gas circuit breaker Download PDF

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JP2014131379A
JP2014131379A JP2012286924A JP2012286924A JP2014131379A JP 2014131379 A JP2014131379 A JP 2014131379A JP 2012286924 A JP2012286924 A JP 2012286924A JP 2012286924 A JP2012286924 A JP 2012286924A JP 2014131379 A JP2014131379 A JP 2014131379A
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screw
hole
contact
circuit breaker
fixed
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JP6045339B2 (en
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Yasunori Nakamura
泰規 中村
Yuji Yoshitomo
雄治 芳友
Daisuke Yoshida
大輔 吉田
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

PROBLEM TO BE SOLVED: To obtain a gas circuit breaker which enables core alignment of a fixed contact while inhibiting the occurence of metallic foreign matters.SOLUTION: A gas circuit breaker 50 comprises: a container 30 in which an insulation gas is enclosed; a fixed contact provided in the container 30; a movable contact which is movably formed so as to come in contact with and separate from the fixed contact in the container 30; a support insulator 4 which is fixed to the fixed contact; a boss for fixation 3 where a through hole 3a is formed, the boss for the fixation 3 being provided on an inner surface of the container 3; and a screw member 5 provided with a screw part 5a, in which an outer screw is formed, the screw member 5 which penetrates through the through hole 3a. A position of the fixed contact is fixed in the container 3 by fixing the support insulator 4 to the boss for the fixation 3 by the screw member 5. The gas circuit breaker 50 further includes a contact restrict part 7 which restricts contact between the outer screw formed at the screw member 5 and an inner surface of the through hole 3a.

Description

本発明は、ガス遮断器に関するものである。   The present invention relates to a gas circuit breaker.

変電所や開閉所などの電気所では、絶縁ガスの吹付けによって接触子間に生じるアークを消弧するガス遮断器が用いられている。このようなガス遮断器では、例えば特許文献１に開示されているように、６フッ化硫黄（ＳＦ６）等の絶縁ガスが充填された金属製の容器内に固定接触子と可動接触子とが設けられる。   In electrical stations such as substations and switch stations, gas circuit breakers that extinguish arcs generated between contacts due to blowing of insulating gas are used. In such a gas circuit breaker, for example, as disclosed in Patent Document 1, a stationary contact and a movable contact are provided in a metal container filled with an insulating gas such as sulfur hexafluoride (SF6). Provided.

固定接触子は、容器に一体形成された取り付けボスに対して支持絶縁体を介して固定される。より具体的には、棒状に延びる支持絶縁体の一端側に固定接触子が固定され、他端側が固定用ボスに固定される。固定ボスには貫通穴が形成されており、貫通穴に軸部を通したボルトを支持絶縁体にねじ込むことで支持絶縁体が固定用ボスに固定される。   The stationary contact is fixed to a mounting boss formed integrally with the container via a support insulator. More specifically, the fixed contact is fixed to one end side of the support insulator extending in a rod shape, and the other end side is fixed to the fixing boss. A through hole is formed in the fixed boss, and the support insulator is fixed to the fixing boss by screwing a bolt having a shaft portion through the through hole into the support insulator.

特開平６−９６６４４号公報JP-A-6-96644

固定接触子を容器内に固定する場合には、可動接触子との芯合わせを行う必要がある。支持絶縁体を固定用ボスに固定するボルトを緩めた状態にして固定接触子を移動させることで、固定接触子の位置を微調整して芯合わせが行われる。   When the fixed contact is fixed in the container, it is necessary to align the core with the movable contact. By moving the fixed contact with the bolt that fixes the support insulator to the fixing boss being loosened, the position of the fixed contact is finely adjusted and the centering is performed.

固定接触子の位置合わせにおいて、固定接触子を移動させる際に、固定ボルトの軸部に形成されたねじ部が固定用ボスの貫通穴の内側面に接触し、貫通穴の内側面が削れて金属異物が発生する場合がある。発生した金属異物が貫通穴から漏れてしまうと、金属異物が原因で絶縁性能が低下して地絡事故を招いてしまう場合がある。そのため、固定接触子の固定作業に加えて、金属異物が漏れていないかの確認や、金属異物の清掃が必要になるが、容器内の限られた空間内で金属異物を確実に発見、清掃することは難しいという問題がある。   When positioning the fixed contact, when the fixed contact is moved, the thread formed on the shaft of the fixing bolt contacts the inner surface of the through hole of the fixing boss, and the inner surface of the through hole is shaved. Metal foreign matter may be generated. If the generated metal foreign material leaks from the through hole, the metal foreign material may cause the insulation performance to deteriorate, resulting in a ground fault. Therefore, in addition to the fixing work of the fixed contact, it is necessary to check whether the metal foreign material is leaking or to clean the metal foreign material. However, the metal foreign material is surely found and cleaned in a limited space inside the container. There is a problem that it is difficult to do.

本発明は、上記に鑑みてなされたものであって、金属異物の発生を抑えて固定接触子の芯合わせを行うことのできるガス遮断器を得ることを目的とする。   This invention is made | formed in view of the above, Comprising: It aims at obtaining the gas circuit breaker which can suppress the generation | occurrence | production of a metal foreign material and can perform center alignment of a stationary contact.

上述した課題を解決し、目的を達成するために、本発明は、絶縁ガスが封入された容器と、容器内に設けられた固定接触子と、容器内で固定接触子に接離可能に移動可能とされた可動接触子と、固定接触子に固定された支持絶縁体と、容器の内側面に設けられて貫通穴が形成された固定用ボスと、外ねじが形成されたねじ部が設けられて貫通穴に貫通されるねじ部材と、を備え、ねじ部材によって支持絶縁体が固定用ボスに固定されることで、容器内における固定接触子の位置が固定され、ねじ部材に形成された外ねじと貫通穴の内側面との接触を規制する接触規制部をさらに備えることを特徴とする。   In order to solve the above-described problems and achieve the object, the present invention provides a container in which an insulating gas is sealed, a stationary contact provided in the container, and a movable contactable contact with the stationary contact in the container. A movable contact made possible, a support insulator fixed to the fixed contact, a fixing boss provided on the inner side surface of the container and having a through hole, and a threaded portion having an external thread are provided. A screw member that is passed through the through hole, and the support insulator is fixed to the fixing boss by the screw member, so that the position of the fixed contact in the container is fixed and formed in the screw member. It further comprises a contact restricting portion for restricting contact between the outer screw and the inner surface of the through hole.

この発明によれば、金属異物の発生を抑えて固定接触子の芯合わせを行うことのできるガス遮断器を得ることができるという効果を奏する。   According to this invention, there is an effect that it is possible to obtain a gas circuit breaker capable of performing the centering of the stationary contact while suppressing the generation of metallic foreign objects.

図１は、本発明の実施の形態１にかかるガス遮断器の内部構成を概略的に示す図である。FIG. 1 is a diagram schematically showing an internal configuration of the gas circuit breaker according to the first exemplary embodiment of the present invention. 図２は、図１に示すＡ部分を拡大した部分拡大断面図である。FIG. 2 is a partially enlarged cross-sectional view in which the portion A shown in FIG. 1 is enlarged. 図３は、実施の形態１の変形例１にかかる貫通穴部分を拡大した部分拡大断面図である。FIG. 3 is a partial enlarged cross-sectional view in which a through hole portion according to Modification 1 of Embodiment 1 is enlarged. 図４は、実施の形態１の変形例１にかかる貫通穴部分を拡大した部分拡大断面図である。FIG. 4 is a partially enlarged cross-sectional view in which a through hole portion according to Modification 1 of Embodiment 1 is enlarged. 図５は、本発明の実施の形態２にかかるガス遮断器を示す図であって、図１に示すＡ部分に相当する部分を拡大した部分拡大断面図である。FIG. 5 is a view showing the gas circuit breaker according to the second embodiment of the present invention, and is a partially enlarged cross-sectional view in which a portion corresponding to the portion A shown in FIG. 1 is enlarged. 図６は、本発明の実施の形態３にかかるガス遮断器を示す図であって、図１に示すＡ部分に相当する部分を拡大した部分拡大断面図である。6 is a diagram showing a gas circuit breaker according to a third embodiment of the present invention, and is a partially enlarged cross-sectional view in which a portion corresponding to the portion A shown in FIG. 1 is enlarged.

以下に、本発明の実施の形態にかかるガス遮断器を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。   Below, the gas circuit breaker concerning embodiment of this invention is demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments.

実施の形態１．
図１は、本発明の実施の形態１にかかるガス遮断器５０の内部構成を概略的に示す図である。ガス遮断器５０は、６フッ化硫黄（ＳＦ６）等の絶縁ガスが充填された金属製の容器（接地タンク）３０内に可動接触子１と固定接触子２とが設けられて構成される。 Embodiment 1 FIG.
FIG. 1 is a diagram schematically showing an internal configuration of the gas circuit breaker 50 according to the first embodiment of the present invention. The gas circuit breaker 50 is configured by providing a movable contact 1 and a fixed contact 2 in a metal container (grounding tank) 30 filled with an insulating gas such as sulfur hexafluoride (SF6).

可動接触子１は、容器３０内で矢印Ｘに示す方向に往復移動可能に設けられ、その往復移動によって固定接触子２に接離可能となっている。可動接触子１を往復移行可能に設ける機構等については、公知の構成を採用すればよいため、詳細な説明については省略する。   The movable contact 1 is provided so as to be able to reciprocate in the direction indicated by the arrow X within the container 30, and can be brought into and out of contact with the fixed contact 2 by the reciprocation. About the mechanism etc. which provide the movable contact 1 so that reciprocation is possible, what is necessary is just to employ | adopt a well-known structure, Therefore It omits about detailed description.

固定接触子２は、容器３０内において、可動接触子１の往復移動に伴って可動接触子１と接離可能となる位置に固定される。ここで、固定接触子２を容器３０に固定する構成について詳細に説明する。図２は、図１に示すＡ部分を拡大した部分拡大断面図である。固定接触子２は、固定用ボス３、支持絶縁体４、固定用ボルト（ねじ部材）５によって容器３０内に固定されている。   The fixed contact 2 is fixed within the container 30 at a position where it can come into contact with and move away from the movable contact 1 as the movable contact 1 reciprocates. Here, the structure which fixes the stationary contact 2 to the container 30 is demonstrated in detail. FIG. 2 is a partially enlarged cross-sectional view in which the portion A shown in FIG. 1 is enlarged. The fixed contact 2 is fixed in the container 30 by a fixing boss 3, a support insulator 4, and a fixing bolt (screw member) 5.

固定用ボス３は、容器３０の内側面から突出するように設けられている。固定用ボス３は、容器３０に一体形成されていてもよいし、容器３０とは別体で形成されて容器３０の内側面に固定されていてもよい。固定用ボス３には、貫通穴３ａが形成されている。   The fixing boss 3 is provided so as to protrude from the inner surface of the container 30. The fixing boss 3 may be formed integrally with the container 30, or may be formed separately from the container 30 and fixed to the inner surface of the container 30. A through hole 3 a is formed in the fixing boss 3.

支持絶縁体４は、図１にも示すように屈曲した棒状の部材であり、絶縁物で形成されている。支持絶縁体４の一端には、固定接触子２が固定される。支持絶縁体４の他端には、ねじ穴が形成されたねじ穴形成部６が埋め込まれている。   The support insulator 4 is a bent rod-shaped member as shown in FIG. 1 and is formed of an insulator. The fixed contact 2 is fixed to one end of the support insulator 4. A screw hole forming portion 6 in which a screw hole is formed is embedded in the other end of the support insulator 4.

固定用ボルト５は、外ねじが形成された軸部（ねじ部）５ａと、軸部５ａの一端に設けられた頭部５ｂと、を有する一般的なボルトである。支持絶縁体４の他端は、固定用ボルト５を用いて固定用ボス３に固定される。ねじ穴形成部６に形成されたねじ穴と固定用ボス２に形成された貫通穴３ａとを重ねた状態で、支持絶縁体４の反対側から貫通穴３ａに固定用ボルト５の軸部５ａを貫通させ、軸部５ａをねじ穴にねじ込むことで、支持絶縁体４が固定用ボス３に固定される。なお、図２に示すようにワッシャ８を用いてもよい。   The fixing bolt 5 is a general bolt having a shaft portion (thread portion) 5a on which an external screw is formed, and a head portion 5b provided at one end of the shaft portion 5a. The other end of the support insulator 4 is fixed to the fixing boss 3 using a fixing bolt 5. In the state where the screw hole formed in the screw hole forming portion 6 and the through hole 3a formed in the fixing boss 2 are overlapped, the shaft portion 5a of the fixing bolt 5 is inserted into the through hole 3a from the opposite side of the support insulator 4. The support insulator 4 is fixed to the fixing boss 3 by screwing the shaft portion 5a into the screw hole. A washer 8 may be used as shown in FIG.

貫通穴３ａには、固定用ボルト５の軸部を貫通させる前に、筒状絶縁体（接触規制部）７が挿入される。筒状絶縁体７は、絶縁物で形成されて筒状形状を呈している。筒状絶縁体７の外径は、固定用ボス３の貫通穴３ａの内径よりも小さい。また、筒状絶縁体７の内径は、固定用ボルト５の軸部５ａの外形よりも大きく、筒状絶縁体７の内側に軸部５ａを貫通させることができる。また、筒状絶縁体７の長さは、貫通穴３ａの深さＰよりも小さくなっている。   A cylindrical insulator (contact restricting portion) 7 is inserted into the through hole 3a before allowing the shaft portion of the fixing bolt 5 to penetrate. The cylindrical insulator 7 is formed of an insulator and has a cylindrical shape. The outer diameter of the cylindrical insulator 7 is smaller than the inner diameter of the through hole 3 a of the fixing boss 3. Further, the inner diameter of the cylindrical insulator 7 is larger than the outer shape of the shaft portion 5 a of the fixing bolt 5, and the shaft portion 5 a can be penetrated inside the cylindrical insulator 7. Moreover, the length of the cylindrical insulator 7 is smaller than the depth P of the through hole 3a.

貫通穴３ａに筒状絶縁体７が挿入されることで、軸部５ａと貫通穴３ａとの間に筒状絶縁体７が介在することとなる。これにより、固定用ボルト５を緩めて固定接触子２を移動させて芯合わせを行っても、軸部５ａと貫通穴３ａとが接触することがなくなるため、貫通穴３ａの内側面がねじの凹凸に削られて金属異物が発生するのを防ぐことができる。   By inserting the cylindrical insulator 7 into the through hole 3a, the cylindrical insulator 7 is interposed between the shaft portion 5a and the through hole 3a. As a result, even if the fixing bolt 5 is loosened and the fixed contact 2 is moved to align the center, the shaft portion 5a and the through hole 3a do not come into contact with each other. It is possible to prevent metal foreign matter from being generated by the unevenness.

また、軸部５ａと筒状絶縁体７とが接触することで筒状絶縁体７がねじに削られて屑が発生したとしても、絶縁物で形成された屑となる。そのため、貫通穴３ａの外に漏れた屑の除去が不十分になってしまった場合であっても、地絡事故を招きにくくすることができる。また、筒状絶縁体７の長さが、貫通穴３ａの深さＰよりも小さくなっているので、筒状絶縁体７が貫通穴３ａから飛び出して固定用ボルト５の頭部５ｂと固定用ボス３との間や、支持絶縁体４と固定用ボス３との間に隙間ができてしまうことを抑えることができる。   Moreover, even if the shaft insulator 5a and the cylindrical insulator 7 come into contact with each other and the cylindrical insulator 7 is scraped into a screw to generate scrap, it becomes scrap formed of an insulator. Therefore, even if the removal of the waste leaking out of the through hole 3a is insufficient, it is possible to make it difficult to cause a ground fault. Further, since the length of the cylindrical insulator 7 is smaller than the depth P of the through hole 3a, the cylindrical insulator 7 protrudes from the through hole 3a and is fixed to the head 5b of the fixing bolt 5 and the fixing bolt 5. It is possible to suppress the formation of a gap between the boss 3 and between the support insulator 4 and the fixing boss 3.

図３は、実施の形態１の変形例１にかかる貫通穴部分を拡大した部分拡大断面図である。図３に示すように、貫通穴３ａの内側面に、筒状絶縁体７の抜け止めとして突部３ｂを形成してもよい。突部３ｂを形成することで、筒状絶縁部７が貫通穴３ａから飛び出して固定用ボルト５の頭部５ｂと固定用ボス３との間や、支持絶縁体４と固定用ボス３との間に隙間ができてしまうことをより確実に抑えることができる。   FIG. 3 is a partial enlarged cross-sectional view in which a through hole portion according to Modification 1 of Embodiment 1 is enlarged. As shown in FIG. 3, a protrusion 3 b may be formed on the inner surface of the through hole 3 a as a stopper for the tubular insulator 7. By forming the protrusion 3b, the cylindrical insulating portion 7 jumps out of the through hole 3a, and between the head 5b of the fixing bolt 5 and the fixing boss 3, or between the support insulator 4 and the fixing boss 3. It can suppress more reliably that a clearance gap will be formed between them.

なお、固定用ボス３よりも支持絶縁体４側となる領域は、固定用ボス３や支持絶縁体７の影になることで、固定用ボス３よりも頭部５ｂ側となる領域よりも視認性や作業性が劣るため、貫通穴３ａから漏れた異物の除去が困難となる。そのため、突部３ｂが形成される方向としては、筒状絶縁体７に対して、固定用ボルト５の頭部５ｂ側よりも、支持絶縁体４側に形成されるほうが好ましい。突部３ｂが支持絶縁体４側に形成されると、支持絶縁体４側に飛び出して固定用ボス３との間に隙間ができてしまうことが予防されるとともに、貫通穴３ａ内で発生した異物が突部３ｂに引っ掛かるため、視認性や作業性が劣る支持絶縁体４側に異物が漏れにくくなる。   Note that the region closer to the support insulator 4 than the fixing boss 3 is more visible than the region closer to the head 5b than the fixing boss 3 by being shaded by the fixing boss 3 and the support insulator 7. Therefore, it is difficult to remove the foreign matter leaked from the through hole 3a. Therefore, it is preferable that the protrusion 3b is formed on the support insulator 4 side with respect to the cylindrical insulator 7 rather than the head 5b side of the fixing bolt 5. When the protrusion 3b is formed on the support insulator 4 side, it is prevented that the protrusion 3b jumps out to the support insulator 4 side to form a gap with the fixing boss 3 and is generated in the through hole 3a. Since the foreign matter is caught by the protrusion 3b, the foreign matter is less likely to leak to the support insulator 4 side where visibility and workability are poor.

図４は、実施の形態１の変形例１にかかる貫通穴部分を拡大した部分拡大断面図である。図３に示すように、固定用ボス３ａに形成された突部３ｂに合わせて、筒状絶縁体７の外側面にも凹凸を形成してもよい。   FIG. 4 is a partially enlarged cross-sectional view in which a through hole portion according to Modification 1 of Embodiment 1 is enlarged. As shown in FIG. 3, irregularities may be formed on the outer surface of the cylindrical insulator 7 in accordance with the protrusions 3 b formed on the fixing boss 3 a.

図５は、本発明の実施の形態２にかかるガス遮断器１００を示す図であって、図１に示すＡ部分に相当する部分を拡大した部分拡大断面図である。なお、上記実施の形態と同様の構成については、同様の符号を付して詳細な説明を省略する。   FIG. 5 is a view showing the gas circuit breaker 100 according to the second embodiment of the present invention, and is a partially enlarged cross-sectional view in which a portion corresponding to the portion A shown in FIG. 1 is enlarged. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

実施の形態２にかかるガス遮断器１００が備える固定用ボルト（ねじ部材）９は、頭部１０と軸部１１とを有するボルトである。固定用ボルト９の軸部１１は、外周面にねじが形成されていない円筒部（接触規制部）１１ａと、外周面に外ねじが形成されたねじ部１１ｂとを有している。円筒部１１ａは、頭部１０とねじ部１１ｂとの間に設けられる。また、円筒部１１ａの外径Ｑよりもねじ部１１ｂの外径Ｒのほうが小さくなっている。   The fixing bolt (screw member) 9 provided in the gas circuit breaker 100 according to the second embodiment is a bolt having a head portion 10 and a shaft portion 11. The shaft portion 11 of the fixing bolt 9 has a cylindrical portion (contact restricting portion) 11a in which a screw is not formed on the outer peripheral surface, and a screw portion 11b in which an outer screw is formed on the outer peripheral surface. The cylindrical portion 11a is provided between the head portion 10 and the screw portion 11b. Further, the outer diameter R of the threaded portion 11b is smaller than the outer diameter Q of the cylindrical portion 11a.

固定用ボルト９を用いて支持絶縁体４を固定用ボス３に固定した状態で、円筒部１１ａは貫通穴３ａの内側に収容される。したがって、ねじ部１１ｂに形成されたねじの凹凸が貫通穴３ａの内側面に接触するのを防ぐことができ、金属屑が発生するのを抑えることができる。   In a state where the support insulator 4 is fixed to the fixing boss 3 using the fixing bolt 9, the cylindrical portion 11a is accommodated inside the through hole 3a. Therefore, it is possible to prevent the unevenness of the screw formed on the screw portion 11b from coming into contact with the inner surface of the through hole 3a, and to suppress the generation of metal scraps.

また、円筒部１１ａの外径Ｑよりもねじ部１１ｂの外径Ｒのほうが小さくなっているので、ねじ部１１ｂの一部が貫通穴３ａの内部に入り込んでいても、ねじ部１１ｂよりも先に円筒部１１ａが貫通穴３ａの内側面に当接する。そのため、ねじの凹凸と貫通穴３ａの内側面との接触を防いで、金属屑の発生を抑えることができる。   Further, since the outer diameter R of the screw portion 11b is smaller than the outer diameter Q of the cylindrical portion 11a, even if a part of the screw portion 11b enters the inside of the through hole 3a, the screw portion 11b is ahead of the screw portion 11b. The cylindrical portion 11a contacts the inner surface of the through hole 3a. Therefore, contact between the unevenness of the screw and the inner surface of the through hole 3a can be prevented, and generation of metal scraps can be suppressed.

図６は、本発明の実施の形態３にかかるガス遮断器１５０を示す図であって、図１に示すＡ部分に相当する部分を拡大した部分拡大断面図である。なお、上記実施の形態と同様の構成については、同様の符号を付して詳細な説明を省略する。   6 is a diagram showing a gas circuit breaker 150 according to Embodiment 3 of the present invention, and is a partially enlarged cross-sectional view in which a portion corresponding to the portion A shown in FIG. 1 is enlarged. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

本実施の形態３では、全ねじ棒（ねじ部材）１２とナット１３とを用いて支持絶縁体４を固定用ボス３に固定する。全ねじ棒１２は、外周面に外ねじが形成されていない円筒部（接触規制部）１２ａの両側に、外周面に外ねじが形成されたねじ部１２ｂが設けられている。   In the third embodiment, the supporting insulator 4 is fixed to the fixing boss 3 using the full screw rod (screw member) 12 and the nut 13. The entire threaded rod 12 is provided with a threaded portion 12b having an outer thread formed on the outer peripheral surface thereof on both sides of a cylindrical portion (contact restricting portion) 12a on which the outer thread is not formed on the outer peripheral surface.

円筒部１２ａの両側に設けられたねじ部１２ｂのうち、一方のねじ部１２ｂを支持絶縁体４のねじ穴にねじ込み、他方のねじ部１２ｂにナット１３を取り付けることで、支持絶縁体４が固定用ボス３に固定され、固定接触子２が容器３０内に固定される。なお、円筒部１２ａの外径Ｓよりもねじ部１２ｂの外径Ｔのほうが小さくなっている。   Of the screw portions 12b provided on both sides of the cylindrical portion 12a, one screw portion 12b is screwed into the screw hole of the support insulator 4, and the nut 13 is attached to the other screw portion 12b, whereby the support insulator 4 is fixed. The fixed contact 2 is fixed in the container 30 by being fixed to the boss 3 for use. Note that the outer diameter T of the threaded portion 12b is smaller than the outer diameter S of the cylindrical portion 12a.

全ねじ棒１２を用いて支持絶縁体４を固定用ボス３に固定した状態で、円筒部１２ａは貫通穴３ａの内側に収容される。したがって、ねじ部１２ｂに形成されたねじの凹凸が貫通穴３ａの内側面に接触するのを防ぐことができ、金属屑が発生するのを抑えることができる。   The cylindrical portion 12 a is accommodated inside the through hole 3 a in a state where the supporting insulator 4 is fixed to the fixing boss 3 using the entire screw rod 12. Therefore, it is possible to prevent the unevenness of the screw formed on the screw portion 12b from coming into contact with the inner surface of the through hole 3a, and to suppress the generation of metal scraps.

また、円筒部１２ａの外径Ｓよりもねじ部１２ｂの外径Ｔのほうが小さくなっているので、ねじ部１２ｂの一部が貫通穴３ａの内部に入り込んでいても、ねじ部１２ｂよりも先に円筒部１２ａが貫通穴３ａの内側面に当接する。そのため、ねじの凹凸と貫通穴３ａの内側面との接触を防いで、金属屑の発生を抑えることができる。   Further, since the outer diameter T of the screw portion 12b is smaller than the outer diameter S of the cylindrical portion 12a, even if a part of the screw portion 12b enters the inside of the through hole 3a, the screw portion 12b is ahead of the screw portion 12b. The cylindrical portion 12a contacts the inner surface of the through hole 3a. Therefore, contact between the unevenness of the screw and the inner surface of the through hole 3a can be prevented, and generation of metal scraps can be suppressed.

なお、支持絶縁体４に埋め込まれるねじ穴形成部６にねじ穴を形成せずに、ねじ穴形成部６自体にナット１３を取り付けるためのねじ部１２や円筒部１２ａを形成しても構わない。この場合、ねじ穴形成部６が、ねじ部材として機能する。また、図５や図６に示す円筒部１１ａ，１２ａと貫通穴３ａとの間に図２に示すような筒状絶縁体７を挿入して、金属異物がより一層発生しにくくなるように構成しても構わない。   In addition, you may form the screw part 12 and the cylindrical part 12a for attaching the nut 13 to screw hole formation part 6 itself, without forming a screw hole in the screw hole formation part 6 embedded in the support insulator 4. FIG. . In this case, the screw hole forming portion 6 functions as a screw member. Also, a cylindrical insulator 7 as shown in FIG. 2 is inserted between the cylindrical portions 11a, 12a and the through hole 3a shown in FIG. 5 and FIG. It doesn't matter.

以上のように、本発明にかかるガス遮断器は、可動接触子と固定接触子とを備えるガス遮断器に有用である。   As described above, the gas circuit breaker according to the present invention is useful for a gas circuit breaker including a movable contact and a fixed contact.

１ 可動接触子、２ 固定接触子、３ 固定用ボス、３ａ 貫通穴、３ｂ 突部、４ 支持絶縁体、５ 固定用ボルト（ねじ部材）、５ａ 軸部（ねじ部）、５ｂ 頭部、６ ねじ穴形成部、７ 筒状絶縁体（接触規制部）、８ ワッシャ、９ 固定用ボルト（ねじ部材）、１０ 頭部、１１ 軸部、１１ａ 円筒部（接触規制部）、１１ｂ ねじ部、１２ 全ねじ棒（ねじ部材）、１２ａ 円筒部（接触規制部）、１２ｂ ねじ部、１３ ナット、３０ 容器、５０，１００，１５０ ガス遮断器。   1 movable contact, 2 fixed contact, 3 fixing boss, 3a through hole, 3b protrusion, 4 support insulator, 5 fixing bolt (screw member), 5a shaft (screw), 5b head, 6 Screw hole forming part, 7 Cylindrical insulator (contact restricting part), 8 Washer, 9 Fixing bolt (screw member), 10 Head, 11 Shaft part, 11a Cylindrical part (contact restricting part), 11b Screw part, 12 Full screw rod (screw member), 12a cylindrical part (contact restricting part), 12b screw part, 13 nut, 30 container, 50, 100, 150 gas circuit breaker.

Claims (8)

絶縁ガスが封入された容器と、
前記容器内に設けられた固定接触子と、
前記容器内で前記固定接触子に接離可能に移動可能とされた可動接触子と、
前記固定接触子に固定された支持絶縁体と、
前記容器の内側面に設けられて貫通穴が形成された固定用ボスと、
外ねじが形成されたねじ部が設けられて前記貫通穴に貫通されるねじ部材と、を備え、
前記ねじ部材によって前記支持絶縁体が前記固定用ボスに固定されることで、前記容器内における前記固定接触子の位置が固定され、
前記ねじ部材に形成された外ねじと前記貫通穴の内側面との接触を規制する接触規制部をさらに備えることを特徴とするガス遮断器。 A container filled with insulating gas;
A stationary contact provided in the container;
A movable contact which is movable in the container so as to be capable of moving toward and away from the fixed contact;
A support insulator fixed to the stationary contact;
A fixing boss provided on the inner surface of the container and having a through hole formed thereon;
A screw member provided with a thread portion in which an external screw is formed and passed through the through hole, and
By fixing the support insulator to the fixing boss by the screw member, the position of the fixed contact in the container is fixed,
The gas circuit breaker further comprising a contact restricting portion for restricting contact between an external screw formed on the screw member and an inner surface of the through hole. 前記支持絶縁体には、前記ねじ部がねじ込まれるねじ穴が形成され、
前記ねじ部材は、外ねじが形成された軸部と頭部とを有するボルトであり、
前記接触規制部は、前記貫通穴に挿入されるとともに、前記軸部を挿通可能な筒状形状を呈する筒状絶縁体であることを特徴とする請求項１に記載のガス遮断器。 A screw hole into which the screw portion is screwed is formed in the support insulator,
The screw member is a bolt having a shaft portion and a head portion on which an external screw is formed,
2. The gas circuit breaker according to claim 1, wherein the contact restricting portion is a tubular insulator that is inserted into the through hole and has a tubular shape that can be inserted through the shaft portion. 前記貫通穴の内周面には、前記筒状絶縁体の抜けを防ぐ突部が形成されていることを特徴とする請求項２に記載のガス遮断器。   The gas circuit breaker according to claim 2, wherein a protrusion that prevents the tubular insulator from coming off is formed on an inner peripheral surface of the through hole. 前記突部は、前記筒状絶縁体よりも前記支持絶縁体側に形成されることを特徴とする請求項３に記載のガス遮断器。   4. The gas circuit breaker according to claim 3, wherein the protrusion is formed closer to the support insulator than the cylindrical insulator. 5. 前記ねじ部材は、頭部と軸部とを有するボルトであり、
前記軸部は、外周面に外ねじが形成されていない円筒部と、外周面に外ねじが形成された前記ねじ部とを有し、
前記支持絶縁体が前記固定用ボスに固定された状態で、前記円筒部が前記貫通穴の内部に収容されることを特徴とする請求項１に記載のガス遮断器。 The screw member is a bolt having a head portion and a shaft portion,
The shaft portion includes a cylindrical portion in which an outer screw is not formed on the outer peripheral surface, and the screw portion in which an outer screw is formed on the outer peripheral surface,
2. The gas circuit breaker according to claim 1, wherein the cylindrical portion is accommodated in the through hole in a state where the support insulator is fixed to the fixing boss. 前記円筒部の外径よりも前記ねじ部の外径のほうが小さいことを特徴とする請求項５に記載のガス遮断器。   The gas circuit breaker according to claim 5, wherein an outer diameter of the screw portion is smaller than an outer diameter of the cylindrical portion. 前記ネジ部材は、外周面に外ねじが形成されていない円筒部と、前記円筒部の両端側に設けられて外周面に外ねじが形成された前記ねじ部とを有する全ねじ棒であり、
前記支持絶縁体には、前記ねじ部がねじ込まれるねじ穴が形成され、
前記円筒部の両端側に設けられた前記ねじ部のうち、一方のねじ部が前記ねじ穴にねじ込まれ、他方のねじ部にナットが取り付けられることで前記支持絶縁体が前記固定用ボスに固定され、
前記支持絶縁体が前記固定用ボスに固定された状態で、前記円筒部が前記貫通穴の内部に収容されることを特徴とする請求項１に記載のガス遮断器。 The screw member is a full screw rod having a cylindrical portion in which an external screw is not formed on the outer peripheral surface, and the screw portion provided on both ends of the cylindrical portion and having an external screw formed on the outer peripheral surface,
A screw hole into which the screw portion is screwed is formed in the support insulator,
Of the screw portions provided on both ends of the cylindrical portion, one screw portion is screwed into the screw hole, and a nut is attached to the other screw portion, whereby the support insulator is fixed to the fixing boss. And
2. The gas circuit breaker according to claim 1, wherein the cylindrical portion is accommodated in the through hole in a state where the support insulator is fixed to the fixing boss. 前記円筒部の外径よりも前記ねじ部の外径のほうが小さいことを特徴とする請求項７に記載のガス遮断器。   The gas circuit breaker according to claim 7, wherein an outer diameter of the screw portion is smaller than an outer diameter of the cylindrical portion.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58111416U (en) * 1982-01-26 1983-07-29 株式会社ニフコ constant pressure screw
JPH0696644A (en) * 1992-09-16 1994-04-08 Mitsubishi Electric Corp Gas-blast breaker
JPH11146541A (en) * 1997-11-04 1999-05-28 Furukawa Electric Co Ltd:The Fixing portion between conductor and spacer of gas-insulated electric equipment
JP2002357368A (en) * 2001-06-04 2002-12-13 Sumitomo Heavy Ind Ltd Leaf spring supporting structure in refrigerating machine
JP2003180007A (en) * 2001-12-10 2003-06-27 Mitsubishi Electric Corp Gas-insulated device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58111416U (en) * 1982-01-26 1983-07-29 株式会社ニフコ constant pressure screw
JPH0696644A (en) * 1992-09-16 1994-04-08 Mitsubishi Electric Corp Gas-blast breaker
JPH11146541A (en) * 1997-11-04 1999-05-28 Furukawa Electric Co Ltd:The Fixing portion between conductor and spacer of gas-insulated electric equipment
JP2002357368A (en) * 2001-06-04 2002-12-13 Sumitomo Heavy Ind Ltd Leaf spring supporting structure in refrigerating machine
JP2003180007A (en) * 2001-12-10 2003-06-27 Mitsubishi Electric Corp Gas-insulated device

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