JP2023042147A

JP2023042147A - gas circuit breaker

Info

Publication number: JP2023042147A
Application number: JP2021149292A
Authority: JP
Inventors: 一人中村; Kazuto Nakamura; 達朗加藤; Tatsuro Kato
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2023-03-27

Abstract

To provide a gas circuit breaker capable of efficiently performing an increase in pressure of an insulation medium and arc extinguishment in the case of a current cutoff operation.SOLUTION: A gas circuit breaker according to the present invention comprises: a filled container 2 filled with an insulation medium 32; a manipulator-side arc contact element 13 which is positioned at one end side in an axial direction inside the filled container 2 and movable in the axial direction; an opposite-side arc contact element 14 which is positioned at the other end side in the axial direction inside the filled container 2 and can be contacted with and separated from the manipulator-side arc contact element 13; and an insulation nozzle 16 which is positioned outside the manipulator-side arc contact element 13 and the opposite-side arc contact element 14 in a radial direction and movable in the axial direction. The opposite-side arc contact element 14 includes: a tip part 14A which extends in the axial direction and is positioned at one end side; a tail part 14C which is positioned at the other end side; and an intermediate part 14B which is positioned between the tip part 14A and the tail part 14C. The intermediate part 14B has a shape thicker than the tip part 14A and the tail part 14C and is not in contact with the insulation nozzle 16.SELECTED DRAWING: Figure 2

Description

本発明は、ガス遮断器、特にパッファ形のガス遮断器に関する。 The present invention relates to a gas circuit breaker, particularly a puffer type gas circuit breaker.

一般に、高電圧の電力系統に用いられるガス遮断器では、電流の遮断動作時にパッファ室で圧縮されて圧力が上昇した絶縁媒体（消弧ガス）を絶縁ノズルによって整流し、この圧縮ガスを電極間に生じたアークに吹き付けて消弧することで電流を遮断する。このようなパッファ形のガス遮断器の例は、特許文献１に記載されている。ガス遮断器は、電極として、操作器で駆動されて移動する操作器側電極と、操作器側電極に対向して配置された対向側電極を備える。それぞれの電極は、通常の通電時（投入時）に主な電流経路を形成する主接触子と、電流遮断時にアークが生成されるアーク接触子とを備える。 Generally, in gas circuit breakers used in high-voltage power systems, the insulation medium (arc-extinguishing gas), which is compressed in the puffer chamber and pressure rises during the current interruption operation, is rectified by an insulation nozzle, and this compressed gas is rectified between the electrodes. The current is interrupted by extinguishing the arc generated in the An example of such a puffer type gas circuit breaker is described in Patent Document 1. The gas circuit breaker includes, as electrodes, an operator-side electrode that is driven and moved by the operator, and a counter-side electrode arranged to face the operator-side electrode. Each electrode has a main contact that forms a main current path during normal energization (on-on) and an arc contact that generates an arc when the current is interrupted.

特許文献２には、遮断動作の途中でアーク接触子間に形成されたアークの熱エネルギーを利用することで、パッファ室内の絶縁媒体の圧力を上昇させるガス遮断器の例が記載されている。例えば特許文献１に記載されたガス遮断器では、パッファ室内の絶縁媒体の圧力上昇のために、操作器の駆動力を大きくする必要がある。特許文献２に記載されたガス遮断器では、このように大きくせざるを得なかった操作器の駆動力を小さくできる。 Patent Document 2 describes an example of a gas circuit breaker that increases the pressure of the insulating medium in the puffer chamber by using the thermal energy of the arc formed between the arc contacts during the breaking operation. For example, in the gas circuit breaker described in Patent Document 1, it is necessary to increase the driving force of the operating device due to the pressure rise of the insulating medium in the puffer chamber. In the gas circuit breaker described in Patent Literature 2, the driving force of the operating device, which had to be increased in this way, can be reduced.

特開２０１６－２２５２２６号公報JP 2016-225226 A 特開２０１６－１３１０６１号公報JP 2016-131061 A

ガス遮断器で電流を効果的に遮断するためには、電流の遮断動作時に、アークで高温になった絶縁媒体をパッファ室内に導入し、パッファ室内の絶縁媒体の圧力を効率的に上昇させるのが好ましい。さらに、圧力が上昇した絶縁媒体をパッファ室から効率的にアークに吹き付けて消弧すると、電流をより効果的に遮断することができる。 In order to effectively interrupt the current with a gas circuit breaker, the insulation medium heated by the arc is introduced into the puffer chamber during the current interruption operation, and the pressure of the insulation medium in the puffer chamber is increased efficiently. is preferred. Furthermore, the current can be cut off more effectively by extinguishing the arc by efficiently blowing the insulating medium with increased pressure from the puffer chamber.

特許文献２に記載されたガス遮断器などの従来のガス遮断器では、絶縁媒体の圧力上昇とアークの消弧の両方を効率的に行うのが困難であり、いずれか一方が非効率的になるという課題がある。操作器の操作力を向上させると、電流の遮断動作時にパッファ室内の絶縁媒体の圧力を上昇させることができるが、操作器のコスト増加が避けられず、好ましくない。 In conventional gas circuit breakers such as the gas circuit breaker described in Patent Document 2, it is difficult to efficiently increase the pressure of the insulating medium and extinguish the arc, and either one is inefficient. There is a problem of becoming Improving the operating force of the operating device makes it possible to increase the pressure of the insulating medium in the puffer chamber at the time of the current interruption operation, but it is not preferable because the cost of the operating device is unavoidably increased.

本発明の目的は、電流の遮断動作時に絶縁媒体の圧力の上昇とアークの消弧の両方を効率的に行うことができるガス遮断器を提供することである。 SUMMARY OF THE INVENTION An object of the present invention is to provide a gas circuit breaker capable of efficiently both increasing the pressure of an insulating medium and extinguishing an arc during current interruption operation.

本発明によるガス遮断器は、絶縁媒体が充填された充填容器と、軸方向の一端側に備えられた操作器と、前記充填容器の内部で前記軸方向に互いに対向して配置された操作器側主接触子と対向側主接触子と、前記充填容器の内部で前記一端側に位置し、前記操作器からの駆動力により前記軸方向に移動可能な操作器側アーク接触子と、前記充填容器の内部で前記軸方向の他端側に位置し、前記軸方向で前記操作器側アーク接触子に対向して、前記操作器側アーク接触子に接離可能な対向側アーク接触子と、前記操作器側アーク接触子と前記対向側アーク接触子よりも径方向の外側に位置し、前記操作器からの駆動力により前記軸方向に移動可能な絶縁ノズルとを備える。前記対向側アーク接触子は、前記軸方向に延伸し、前記一端側に位置する先端部と、前記他端側に位置する末尾部と、前記先端部と前記末尾部との間に位置する中間部とを備える。前記中間部は、前記先端部と前記末尾部よりも太い形状を備え、前記絶縁ノズルに接触しない。 A gas circuit breaker according to the present invention comprises a filling container filled with an insulating medium, an operating device provided at one end in the axial direction, and operating devices arranged opposite each other in the axial direction inside the filling container side main contact, opposing side main contact, actuator-side arc contact located on the one end side inside the filling container and movable in the axial direction by a driving force from the actuator, and the filling an opposing side arc contact located on the other end side in the axial direction inside the container, facing the operating device side arc contact in the axial direction and capable of contacting and separating from the operating device side arc contact; An insulating nozzle is provided radially outside the arc contact on the operator side and the arc contact on the opposing side and is movable in the axial direction by a driving force from the operator. The opposed-side arc contact extends in the axial direction, and includes a tip portion positioned on the one end side, a tail portion positioned on the other end side, and an intermediate portion positioned between the tip portion and the tail portion. and a part. The intermediate portion has a shape that is thicker than the tip portion and the tail portion and does not contact the insulating nozzle.

本発明によると、電流の遮断動作時に絶縁媒体の圧力の上昇とアークの消弧の両方を効率的に行うことができるガス遮断器を提供することができる。 According to the present invention, it is possible to provide a gas circuit breaker that can efficiently both increase the pressure of an insulating medium and extinguish an arc during current interruption operation.

本発明の実施例１によるガス遮断器の構成を示す断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the structure of the gas circuit breaker by Example 1 of this invention. 実施例１によるガス遮断器において、電流の遮断動作前の電極を示す断面図である。FIG. 4 is a cross-sectional view showing the electrode before current interruption operation in the gas circuit breaker according to Example 1; 実施例１によるガス遮断器において、電流の遮断動作時に互いに開離した直後の操作器側アーク接触子と対向側アーク接触子を示す断面図である。FIG. 4 is a cross-sectional view showing the arc contact on the operator side and the arc contact on the opposing side immediately after they are separated from each other during current interruption operation in the gas circuit breaker according to the first embodiment; 実施例１によるガス遮断器において、電流ゼロ点での操作器側アーク接触子と対向側アーク接触子を示す断面図である。FIG. 2 is a cross-sectional view showing an operator-side arc contact and a counter-side arc contact at a zero current point in the gas circuit breaker according to Example 1; 実施例１によるガス遮断器において、電流の遮断動作後の操作器側アーク接触子と対向側アーク接触子を示す断面図である。FIG. 4 is a cross-sectional view showing the arc contact on the operator side and the arc contact on the opposite side after the current breaking operation in the gas circuit breaker according to the first embodiment; 実施例１によるガス遮断器において、電流の遮断動作の開始から完了までの熱パッファ室の圧力を解析した結果の一例を示すグラフである。7 is a graph showing an example of the result of analyzing the pressure in the heat puffer chamber from the start to the end of the current interruption operation in the gas circuit breaker according to Example 1. FIG. 本発明の実施例２によるガス遮断器において、電流の遮断動作前の電極を示す断面図である。FIG. 6 is a cross-sectional view showing an electrode before a current breaking operation in the gas circuit breaker according to Example 2 of the present invention; 実施例２によるガス遮断器において、電流の遮断動作時に互いに開離した直後の操作器側アーク接触子と対向側アーク接触子を示す断面図である。FIG. 8 is a cross-sectional view showing the arc contact on the operating device side and the arc contact on the opposite side immediately after they are separated from each other during current interruption operation in the gas circuit breaker according to Example 2; 実施例２によるガス遮断器において、電流ゼロ点での操作器側アーク接触子と対向側アーク接触子を示す断面図である。FIG. 8 is a cross-sectional view showing an operator-side arc contact and a counter-side arc contact at a zero current point in the gas circuit breaker according to Example 2; 実施例２によるガス遮断器において、電流の遮断動作後の操作器側アーク接触子と対向側アーク接触子を示す断面図である。FIG. 8 is a cross-sectional view showing the arc contact on the operating device side and the arc contact on the opposing side after the current breaking operation in the gas circuit breaker according to Example 2;

本発明によるガス遮断器は、操作器側に位置して軸方向に移動可能な操作器側アーク接触子と、操作器側アーク接触子と軸方向で対向する対向側アーク接触子と、操作器側アーク接触子と対向側アーク接触子を囲むことができるように位置して軸方向に移動可能な絶縁ノズルを備える。対向側アーク接触子は、軸方向の中央部である対向側アーク接触子中間部が径方向外側に突出しており、絶縁ノズルに接触しない。なお、対向側アーク接触子は、軸方向に移動可能であってもよい。 A gas circuit breaker according to the present invention comprises an operator-side arc contact that is positioned on the operator side and is axially movable; an opposing-side arc contact that axially faces the operator-side arc contact; An axially movable insulating nozzle is provided so as to surround the side arc contact and the opposing side arc contact. In the opposing arc contact, the intermediate portion of the opposing arc contact, which is the central portion in the axial direction, protrudes radially outward and does not come into contact with the insulating nozzle. The opposing arc contact may be axially movable.

絶縁ノズルは、軸方向の中央部である絶縁ノズルスロート部にて内周部が径方向内側に突出しているのが好ましい。操作器側アーク接触子と対向側アーク接触子が互いに開離したときには、対向側アーク接触子中間部の少なくとも一部は、軸方向における絶縁ノズルスロート部の存在範囲内に位置するのが好ましい。 It is preferable that the insulating nozzle has an inner circumferential portion protruding radially inward at the insulating nozzle throat portion, which is the central portion in the axial direction. When the operator-side arc contact and the opposing-side arc contact are separated from each other, at least a portion of the opposing-side arc contact intermediate portion is preferably positioned within the axially existing range of the insulating nozzle throat portion.

従来のガス遮断器では、対向側アーク接触子は、太さが軸方向で一定であり、中央部が径方向外側に突出していない。このため、従来のガス遮断器は、電流の遮断動作時にパッファ室内の絶縁媒体の圧力を効率的に上昇させることと、絶縁媒体をパッファ室から効率的にアークに吹き付けて消弧することの両立が困難である。 In the conventional gas circuit breaker, the arc contact on the opposing side has a constant thickness in the axial direction, and the central portion does not protrude radially outward. For this reason, the conventional gas circuit breaker efficiently raises the pressure of the insulating medium in the puffer chamber at the time of current interruption operation, and efficiently blows the insulating medium from the puffer chamber to the arc to extinguish the arc. is difficult.

本発明によるガス遮断器は、上記の構成を備え、電流の遮断動作時に絶縁媒体の圧力の上昇とアークの消弧の両方を効率的に行うことができる。また、本発明によるガス遮断器では、操作器の駆動力（操作力）を向上させなくても電流の遮断動作時にパッファ室内の絶縁媒体の圧力を上昇させることができるので、操作器のコストの増加を避けることができる。 The gas circuit breaker according to the present invention has the above configuration, and can efficiently both increase the pressure of the insulating medium and extinguish the arc during current interruption operation. In addition, in the gas circuit breaker according to the present invention, the pressure of the insulating medium in the puffer chamber can be increased during the current interruption operation without increasing the driving force (operating force) of the actuator, so the cost of the actuator can be reduced. increase can be avoided.

以下、本発明の実施例によるガス遮断器を、図面を用いて説明する。なお、本明細書で用いる図面において、同一のまたは対応する構成要素には同一の符号を付け、これらの構成要素については繰り返しの説明を省略する場合がある。 Hereinafter, gas circuit breakers according to embodiments of the present invention will be described with reference to the drawings. In the drawings used in this specification, the same or corresponding components are denoted by the same reference numerals, and repeated description of these components may be omitted.

図１と図２を用いて、本発明の実施例１によるガス遮断器を説明する。本実施例によるガス遮断器は、パッファ形のガス遮断器である。 A gas circuit breaker according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. The gas circuit breaker according to this embodiment is a puffer type gas circuit breaker.

図１は、本実施例によるガス遮断器の構成を示す断面図である。図２は、本実施例によるガス遮断器において、電流の遮断動作前の電極（投入時の電極）を示す断面図である。 FIG. 1 is a cross-sectional view showing the configuration of a gas circuit breaker according to this embodiment. FIG. 2 is a cross-sectional view showing the electrode before current interruption operation (electrode at the time of closing) in the gas circuit breaker according to the present embodiment.

本実施例によるガス遮断器は、円筒形の充填容器２を備えるとともに、充填容器２の内部に、電極と、操作器側導体４と、対向側導体５と、絶縁ノズル１６と、シリンダ１８と、中空ロッド１７と、絶縁ロッド３と、操作器側アーク接触子カバー１５を備える。さらに、ガス遮断器は、一端側（図１と図２の右側）に操作器１を備える。 The gas circuit breaker according to this embodiment includes a cylindrical filling container 2, and inside the filling container 2, an electrode, an operator-side conductor 4, an opposing-side conductor 5, an insulating nozzle 16, and a cylinder 18 are arranged. , a hollow rod 17 , an insulating rod 3 , and an arc contactor cover 15 on the operator side. Furthermore, the gas circuit breaker has an operator 1 on one end side (the right side in FIGS. 1 and 2).

以下では、本実施例によるガス遮断器において、操作器１を備える一端側を「操作器側」と呼び、他端側（図１と図２の左側）を「対向側」と呼ぶ。 Hereinafter, in the gas circuit breaker according to this embodiment, the one end side provided with the operating device 1 is called the "operating device side", and the other end side (the left side in FIGS. 1 and 2) is called the "opposing side".

充填容器２の内部には、消弧性を有する絶縁媒体３２が充填されている。絶縁媒体３２は、アークに吹き付けられる消弧ガスであり、代表的な例としてＳＦ_６ガスを挙げることができる。 The filling container 2 is filled with an arc-extinguishing insulating medium 32 . The insulating medium 32 is an arc-extinguishing gas that is blown onto the arc, and a typical example thereof is _SF6 gas.

ガス遮断器は、電極として、操作器側主接触子１１、対向側主接触子１２、操作器側アーク接触子１３、及び対向側アーク接触子１４を備える。操作器側主接触子１１と対向側主接触子１２は、互いに対向して配置され、互いに接離可能である。対向側主接触子１２は、操作器側主接触子１１の対向側に位置する。操作器側アーク接触子１３と対向側アーク接触子１４は、互いに対向して配置され、互いに接離可能である。対向側アーク接触子１４は、操作器側アーク接触子１３の対向側に位置する。 A gas circuit breaker is provided with the operator side main contactor 11, the opposing side main contactor 12, the operator side arc contactor 13, and the opposing side arc contactor 14 as an electrode. The operator-side main contactor 11 and the opposed-side main contactor 12 are arranged to face each other and can be brought into contact with each other and separated from each other. The opposed-side main contact 12 is located on the opposite side of the operator-side main contact 11 . The operator-side arc contactor 13 and the opposed-side arc contactor 14 are arranged to face each other and can be brought into contact with each other and separated from each other. The opposing-side arc contact 14 is located on the opposite side of the operator-side arc contact 13 .

操作器側導体４は、操作器側の電極である操作器側主接触子１１と操作器側アーク接触子１３に電流を流す。対向側導体５は、対向側の電極である対向側主接触子１２と対向側アーク接触子１４に電流を流す。 The operator-side conductor 4 supplies current to the operator-side main contactor 11 and the operator-side arc contactor 13, which are electrodes on the operator side. The opposing conductor 5 causes current to flow through the opposing main contact 12 and the opposing arc contact 14, which are electrodes on the opposing side.

絶縁ノズル１６は、筒状の部材であり、操作器側アーク接触子１３と対向側アーク接触子１４を囲むことができるように配置されている。絶縁ノズル１６の操作器側の先端部は、シリンダ１８の対向側の先端部に固定されている。アークを消弧するときには、絶縁ノズル１６の内部を絶縁媒体３２が流れる。 The insulating nozzle 16 is a tubular member and is arranged so as to surround the arc contact 13 on the operator side and the arc contact 14 on the opposing side. The tip of the insulating nozzle 16 on the side of the operator is fixed to the tip of the cylinder 18 on the opposite side. An insulating medium 32 flows inside the insulating nozzle 16 when extinguishing the arc.

シリンダ１８は、対向側の端部の外面に操作器側主接触子１１を備える。シリンダ１８の内部には、中空ロッド１７が配置されている。また、シリンダ１８の内部は、熱パッファ室１９と機械パッファ室２１に分けられている。熱パッファ室１９と機械パッファ室２１の間には、逆止弁２０が設置されている。逆止弁２０は、シリンダ１８を熱パッファ室１９と機械パッファ室２１に区切っている。 The cylinder 18 has the operator side main contactor 11 on the outer surface of the end on the opposite side. A hollow rod 17 is arranged inside the cylinder 18 . The interior of the cylinder 18 is divided into a thermal puffer chamber 19 and a mechanical puffer chamber 21 . A check valve 20 is installed between the thermal puffer chamber 19 and the mechanical puffer chamber 21 . A check valve 20 separates the cylinder 18 into a thermal puffer chamber 19 and a mechanical puffer chamber 21 .

中空ロッド１７は、シリンダ１８に固定されている。中空ロッド１７の対向側の先端部の内周側に、操作器側アーク接触子１３が固定されている。中空ロッド１７の操作器側の端部は、絶縁ロッド３を介して操作器１と機械的に接続されている。 Hollow rod 17 is fixed to cylinder 18 . An operator-side arc contact 13 is fixed to the inner peripheral side of the tip of the hollow rod 17 on the opposite side. The end of the hollow rod 17 on the operating device side is mechanically connected to the operating device 1 via the insulating rod 3 .

操作器側アーク接触子カバー１５は、中空ロッド１７に設けられ、操作器側アーク接触子１３の周囲を覆う。 The operator-side arc contactor cover 15 is provided on the hollow rod 17 and covers the operator-side arc contactor 13 .

操作器１からの油圧やばねなどの駆動力により、絶縁ロッド３、中空ロッド１７、シリンダ１８、操作器側主接触子１１、操作器側アーク接触子１３、操作器側アーク接触子カバー１５、及び絶縁ノズル１６は、図１と図２の左右方向に移動可能である。なお、対向側主接触子１２と対向側アーク接触子１４は、操作器１からの駆動力により図１と図２の左右方向に移動しても移動しなくてもよい。本実施例では、対向側主接触子１２と対向側アーク接触子１４は、移動しないものとする。 By driving force such as hydraulic pressure and springs from the operating device 1, the insulating rod 3, the hollow rod 17, the cylinder 18, the operating device side main contactor 11, the operating device side arc contactor 13, the operating device side arc contactor cover 15, And the insulating nozzle 16 is movable in the horizontal direction in FIGS. The opposed main contact 12 and the opposed arc contact 14 may or may not move in the horizontal direction in FIGS. In this embodiment, it is assumed that the opposed main contact 12 and the opposed arc contact 14 do not move.

以下では、ガス遮断器において、図１と図２の左右方向（操作器側主接触子１１、操作器側アーク接触子１３、及び絶縁ノズル１６などが移動する方向）「軸方向」と呼び、軸方向に垂直な方向を「径方向」と呼ぶ。従って、操作器１は、軸方向の一端側に備えられている。操作器側主接触子１１は、充填容器２の内部で軸方向の一端側に位置する。対向側主接触子１２は、充填容器２の内部で軸方向の他端側に位置して、軸方向で操作器側主接触子１１に対向する。操作器側アーク接触子１３は、充填容器２の内部で軸方向の一端側に位置する。対向側アーク接触子１４は、充填容器２の内部で軸方向の他端側に位置して、軸方向で操作器側アーク接触子１３に対向する。絶縁ノズル１６は、操作器側アーク接触子１３と対向側アーク接触子１４よりも径方向の外側に位置する。 1 and 2 (the direction in which the operator-side main contactor 11, the operator-side arc contactor 13, and the insulating nozzle 16 move) in the gas circuit breaker will be referred to as the "axial direction" below. The direction perpendicular to the axial direction is called the "radial direction". Therefore, the operating device 1 is provided on one end side in the axial direction. The operator-side main contactor 11 is located inside the filling container 2 on one end side in the axial direction. The opposed-side main contact 12 is positioned on the other end side in the axial direction inside the filling container 2 and faces the operator-side main contact 11 in the axial direction. The operator-side arc contact 13 is located inside the filling container 2 on one end side in the axial direction. The opposed-side arc contact 14 is located on the other end side in the axial direction inside the filling container 2 and faces the operator-side arc contact 13 in the axial direction. The insulating nozzle 16 is positioned radially outside the operator-side arc contact 13 and the opposed-side arc contact 14 .

また、操作器側主接触子１１と操作器側アーク接触子１３が、それぞれ対向側主接触子１２と対向側アーク接触子１４に近づく方向（図１と図２の左方向）を「投入方向」と呼び、離れる方向（図１と図２の右方向）を「遮断方向」と呼ぶ。 Further, the direction in which the operator-side main contactor 11 and the operator-side arc contactor 13 approach the opposite-side main contactor 12 and the opposite-side arc contactor 14, respectively (the left direction in FIGS. 1 and 2) is defined as the "closing direction." , and the direction away (to the right in FIGS. 1 and 2) is called the "blocking direction."

図２を用いて、対向側アーク接触子１４と絶縁ノズル１６を詳しく説明する。 The opposing arc contact 14 and the insulating nozzle 16 will be described in detail with reference to FIG.

対向側アーク接触子１４は、軸方向に延伸する丸棒状の部材であり、対向側アーク接触子先端部１４Ａ、対向側アーク接触子中間部１４Ｂ、及び対向側アーク接触子末尾部１４Ｃを備える。対向側アーク接触子先端部１４Ａは、対向側アーク接触子１４において、軸方向の操作器側に位置する部分（軸方向の先端部）である。対向側アーク接触子末尾部１４Ｃは、対向側アーク接触子１４において、軸方向の対向側に位置する部分（軸方向の末尾）である。対向側アーク接触子中間部１４Ｂは、対向側アーク接触子１４において、軸方向の中央部であり、対向側アーク接触子先端部１４Ａと対向側アーク接触子末尾部１４Ｃの間に位置する部分である。 The opposing arc contact 14 is a rod-shaped member extending in the axial direction, and includes an opposing arc contact tip portion 14A, an opposing arc contact intermediate portion 14B, and an opposing arc contact trailing portion 14C. The opposing arc contact tip portion 14A is a portion (axial tip portion) of the opposing arc contactor 14 located on the operator side in the axial direction. The opposing arc contact tail portion 14C is a portion (axial tail) of the opposing arc contact 14 located on the opposite side in the axial direction. The opposing arc contact intermediate portion 14B is the central portion in the axial direction of the opposing arc contact 14, and is a portion located between the opposing arc contact tip portion 14A and the opposing arc contact trailing portion 14C. be.

対向側アーク接触子中間部１４Ｂは、対向側アーク接触子先端部１４Ａと対向側アーク接触子末尾部１４Ｃよりも太い形状を備える。すなわち、対向側アーク接触子中間部１４Ｂは、対向側アーク接触子１４の径方向外側に突出している部分であり、対向側アーク接触子中間部１４Ｂの直径は、対向側アーク接触子先端部１４Ａの直径と対向側アーク接触子末尾部１４Ｃの直径よりも大きい。 The opposing arc contact intermediate portion 14B has a shape that is thicker than the opposing arc contact tip portion 14A and the opposing arc contact tail portion 14C. That is, the opposing arc contact intermediate portion 14B is a portion protruding radially outward from the opposing arc contact 14, and the diameter of the opposing arc contact intermediate portion 14B is equal to that of the opposing arc contact distal end portion 14A. and the diameter of the opposing arc contact tail 14C.

絶縁ノズル１６は、軸方向に延伸する筒状の部材であり、絶縁ノズル上流部１６Ａ、絶縁ノズルスロート部１６Ｂ、及び絶縁ノズル下流部１６Ｃを備える。絶縁ノズル上流部１６Ａは、絶縁ノズル１６において、アークを消弧するときの絶縁媒体３２の流れの上流側の部分（軸方向の操作器側に位置する部分）である。絶縁ノズル下流部１６Ｃは、絶縁ノズル１６において、アークを消弧するときの絶縁媒体３２の流れの下流側の部分（軸方向の対向側に位置する部分）である。絶縁ノズルスロート部１６Ｂは、絶縁ノズル１６において、軸方向の中央部であり、絶縁ノズル上流部１６Ａと絶縁ノズル下流部１６Ｃの間に位置する部分である。 The insulating nozzle 16 is a tubular member extending in the axial direction, and includes an insulating nozzle upstream portion 16A, an insulating nozzle throat portion 16B, and an insulating nozzle downstream portion 16C. The insulating nozzle upstream portion 16A is a portion of the insulating nozzle 16 on the upstream side of the flow of the insulating medium 32 when the arc is extinguished (a portion located on the operator side in the axial direction). The insulating nozzle downstream portion 16C is a portion of the insulating nozzle 16 on the downstream side of the flow of the insulating medium 32 when extinguishing the arc (portion located on the opposite side in the axial direction). The insulating nozzle throat portion 16B is a central portion in the axial direction of the insulating nozzle 16, and is a portion located between the insulating nozzle upstream portion 16A and the insulating nozzle downstream portion 16C.

絶縁ノズルスロート部１６Ｂでは、絶縁ノズル１６の内周部が、絶縁ノズル上流部１６Ａと絶縁ノズル下流部１６Ｃよりも径方向内側に位置している。すなわち、絶縁ノズル１６は、絶縁ノズルスロート部１６Ｂでの内径が、絶縁ノズル上流部１６Ａでの内径と絶縁ノズル下流部１６Ｃでの内径よりも小さい。 In the insulating nozzle throat portion 16B, the inner peripheral portion of the insulating nozzle 16 is located radially inward of the insulating nozzle upstream portion 16A and the insulating nozzle downstream portion 16C. That is, the insulating nozzle 16 has an inner diameter at the insulating nozzle throat portion 16B smaller than the inner diameter at the insulating nozzle upstream portion 16A and the inner diameter at the insulating nozzle downstream portion 16C.

絶縁ノズルスロート部１６Ｂの内径は、対向側アーク接触子中間部１４Ｂの直径よりも大きい。このため、絶縁ノズルスロート部１６Ｂは、対向側アーク接触子１４が軸方向に移動しても、対向側アーク接触子中間部１４Ｂに接触しない。すなわち、対向側アーク接触子中間部１４Ｂは、絶縁ノズル１６に接触しない。 The inner diameter of the insulating nozzle throat portion 16B is larger than the diameter of the opposing arc contact intermediate portion 14B. Therefore, the insulating nozzle throat portion 16B does not come into contact with the opposing arc contact intermediate portion 14B even when the opposing arc contact 14 moves in the axial direction. That is, the opposing arc contact intermediate portion 14B does not contact the insulating nozzle 16 .

本実施例によるガス遮断器の電流遮断時の動作を、図３、図４、及び図５を用いて説明する。図３、図４、及び図５には、電流遮断時に操作器１からの駆動力によって、中空ロッド１７、シリンダ１８、操作器側主接触子１１、操作器側アーク接触子１３、操作器側アーク接触子カバー１５、及び絶縁ノズル１６が、図２に示した遮断動作前の状態から遮断方向に移動する様子を時系列順に示す。図３と図４には、遮断動作時に生じたアークによって高温となった絶縁媒体３２（ホットガス）の流れを矢印で示している。 The operation of the gas circuit breaker according to this embodiment at the time of current interruption will be described with reference to FIGS. 3, 4, and 5. FIG. 3, 4, and 5 show a hollow rod 17, a cylinder 18, an actuator-side main contact 11, an actuator-side arc contact 13, and an actuator-side main contactor 11, an actuator-side arc contactor 13, and an actuator-side arc contactor 11, which are driven by the driving force from the actuator 1 at the time of current interruption. 3 shows how the arc contactor cover 15 and the insulating nozzle 16 move in the breaking direction from the state before the breaking operation shown in FIG. 2 in chronological order. In FIGS. 3 and 4, arrows indicate the flow of the insulating medium 32 (hot gas) heated by the arc generated during the breaking operation.

図３は、電流の遮断動作時に互いに開離した直後の操作器側アーク接触子１３と対向側アーク接触子１４を示す断面図である。 FIG. 3 is a cross-sectional view showing the arc contact 13 on the operator side and the arc contact 14 on the opposing side immediately after they are separated from each other during current interruption operation.

図２に示した状態のガス遮断器において、操作器１は、外部からの電気信号などによる電流遮断指令を受けて駆動力を発生させる。操作器１が駆動力を発生させると、絶縁ロッド３、中空ロッド１７、シリンダ１８、操作器側主接触子１１、操作器側アーク接触子１３、操作器側アーク接触子カバー１５、及び絶縁ノズル１６が遮断方向に移動し、操作器側アーク接触子１３と対向側アーク接触子１４は、互いに開離する。 In the gas circuit breaker in the state shown in FIG. 2, the operating device 1 receives a current interruption command by an electric signal or the like from the outside and generates a driving force. When the operating device 1 generates a driving force, the insulating rod 3, the hollow rod 17, the cylinder 18, the operating device side main contact 11, the operating device side arc contact 13, the operating device side arc contact cover 15, and the insulating nozzle 16 moves in the breaking direction, and the operator side arc contactor 13 and the opposite side arc contactor 14 are separated from each other.

図３に示すように、操作器側アーク接触子１３と対向側アーク接触子１４が互いに開離した際には、電流が流れ続けているので、操作器側アーク接触子１３と対向側アーク接触子１４の間にアーク３１が発生する。絶縁媒体３２は、アーク３１から発生した熱エネルギーによって圧力が高くなり、矢印３２ａのように流れて熱パッファ室１９に流入する。熱パッファ室１９の圧力は、この絶縁媒体３２の流れ（矢印３２ａ）により上昇する。 As shown in FIG. 3, when the arc contact 13 on the operator side and the arc contact 14 on the opposite side are separated from each other, the current continues to flow. An arc 31 is generated between the children 14 . The insulating medium 32 is pressurized by the thermal energy generated from the arc 31 and flows into the heat puffer chamber 19 as indicated by arrows 32a. The pressure in the heat puffer chamber 19 rises due to the flow of this insulating medium 32 (arrow 32a).

本実施例によるガス遮断器では、対向側アーク接触子１４は、対向側アーク接触子中間部１４Ｂにて径方向外側に突出しており、絶縁ノズル１６は、絶縁ノズルスロート部１６Ｂにて内周部が径方向内側に突出している。そして、操作器側アーク接触子１３と対向側アーク接触子１４が互いに開離したときには、対向側アーク接触子中間部１４Ｂは、少なくともその一部が軸方向における絶縁ノズルスロート部１６Ｂの存在範囲内に位置する。 In the gas circuit breaker according to this embodiment, the opposing arc contactor 14 protrudes radially outward at the opposing arc contact intermediate portion 14B, and the insulating nozzle 16 protrudes radially outward at the insulating nozzle throat portion 16B. protrudes radially inward. When the operator-side arc contactor 13 and the opposing-side arc contactor 14 are separated from each other, at least a part of the opposing-side arc contactor intermediate portion 14B is within the existence range of the insulating nozzle throat portion 16B in the axial direction. Located in

この構成により、本実施例によるガス遮断器では、アーク３１が消弧されるまでにアーク３１の発生位置から対向側アーク接触子中間部１４Ｂと絶縁ノズルスロート部１６Ｂとの間を通って対向側にある絶縁ノズル下流部１６Ｃに流出する絶縁媒体３２の流路を狭め、絶縁ノズル下流部１６Ｃに流出する絶縁媒体３２の量を減少させることができる。このため、本実施例によるガス遮断器では、熱パッファ室１９の圧力をより大きく上昇させることができ、絶縁媒体３２の圧力を効率的に上昇させることができる。 With this configuration, in the gas circuit breaker according to the present embodiment, the arc 31 is extinguished from the position where the arc 31 is generated, passing between the opposing side arc contact intermediate portion 14B and the insulating nozzle throat portion 16B. It is possible to narrow the flow path of the insulating medium 32 that flows out to the insulating nozzle downstream portion 16C at the bottom, and reduce the amount of the insulating medium 32 that flows out to the insulating nozzle downstream portion 16C. Therefore, in the gas circuit breaker according to the present embodiment, the pressure in the heat puffer chamber 19 can be increased more, and the pressure in the insulating medium 32 can be increased efficiently.

図４は、電流ゼロ点での操作器側アーク接触子１３と対向側アーク接触子１４を示す断面図である。電流ゼロ点とは、アーク３１が消弧されて電流が遮断された時点である。 FIG. 4 is a sectional view showing the arc contact 13 on the operator side and the arc contact 14 on the opposing side at the zero current point. The current zero point is the time point at which the arc 31 is extinguished and the current is interrupted.

図３に示した状態の後、ガス遮断器の遮断動作が進んでいき、アーク３１が消弧されて電流が遮断されたときには、対向側アーク接触子先端部１４Ａが絶縁ノズルスロート部１６Ｂから抜けている。すなわち、電流ゼロ点では、対向側アーク接触子先端部１４Ａは、図４に示すように軸方向における絶縁ノズル下流部１６Ｃの存在範囲内に位置するか、絶縁ノズル１６よりも対向側に位置する。 After the state shown in FIG. 3, the interruption operation of the gas circuit breaker progresses, and when the arc 31 is extinguished and the current is interrupted, the opposing arc contact tip portion 14A is pulled out of the insulating nozzle throat portion 16B. ing. That is, at the current zero point, the opposite arc contact tip 14A is positioned within the existence range of the insulating nozzle downstream portion 16C in the axial direction as shown in FIG. .

図３に示した状態の後から図４に示すような電流ゼロ点の状態に到達するまでに、熱パッファ室１９の内部で高圧になった絶縁媒体３２は、矢印３２ｂで示すように、絶縁ノズル上流部１６Ａと絶縁ノズルスロート部１６Ｂの内部を通って絶縁ノズル下流部１６Ｃと対向側アーク接触子先端部１４Ａとの隙間を流れていく。なお、電流ゼロ点の状態でも、絶縁媒体３２を吹き付けて、アーク３１が再発弧（再発生）しないようにする。 After the state shown in FIG. 3 and before reaching the current zero point state shown in FIG. It flows through the inside of the nozzle upstream portion 16A and the insulating nozzle throat portion 16B, and flows through the gap between the insulating nozzle downstream portion 16C and the opposing side arc contact tip portion 14A. Even in the zero current state, the insulating medium 32 is blown to prevent the arc 31 from re-igniting (re-occurring).

本実施例によるガス遮断器では、対向側アーク接触子先端部１４Ａは、電流ゼロ点で、軸方向における絶縁ノズル下流部１６Ｃの存在範囲内に位置するか、絶縁ノズル１６よりも対向側に位置する。絶縁ノズル１６の内径は、絶縁ノズル下流部１６Ｃでは、絶縁ノズルスロート部１６Ｂよりも大きい。このため、本実施例によるガス遮断器では、操作器側アーク接触子１３と対向側アーク接触子１４が互いに開離した後で電流ゼロ点の状態に到達するまでに、絶縁ノズル下流部１６Ｃと対向側アーク接触子先端部１４Ａとの隙間が広くなり（すなわち、絶縁媒体３２の流路が広くなり）、この隙間を絶縁媒体３２が流れやすくなる。従って、本実施例によるガス遮断器では、アーク３１に多量の絶縁媒体３２を吹き付けることができ、アーク３１を効率的に消弧することができる。 In the gas circuit breaker according to the present embodiment, the opposing arc contact tip 14A is located within the existence range of the insulating nozzle downstream portion 16C in the axial direction, or is located on the opposite side of the insulating nozzle 16 at the zero current point. do. The inner diameter of the insulating nozzle 16 is larger at the insulating nozzle downstream portion 16C than at the insulating nozzle throat portion 16B. For this reason, in the gas circuit breaker according to the present embodiment, after the arc contact 13 on the operator side and the arc contact 14 on the opposite side are separated from each other, the insulating nozzle downstream portion 16C and the insulating nozzle downstream portion 16C and The gap with the arc contact tip 14A on the opposite side widens (that is, the flow path of the insulating medium 32 widens), and the insulating medium 32 easily flows through this gap. Therefore, in the gas circuit breaker according to this embodiment, a large amount of insulating medium 32 can be sprayed onto the arc 31, and the arc 31 can be extinguished efficiently.

また、対向側アーク接触子先端部１４Ａの直径を適切な値に設計することで、図４に示した状態において、絶縁ノズル下流部１６Ｃと対向側アーク接触子先端部１４Ａとの隙間を流れる絶縁媒体３２ｂの量を、電流の遮断動作に対して最適な値に設定することができる。 In addition, by designing the diameter of the opposing arc contact tip 14A to an appropriate value, in the state shown in FIG. The amount of medium 32b can be set to an optimum value for current interrupting operation.

図５は、電流の遮断動作後の操作器側アーク接触子１３と対向側アーク接触子１４を示す断面図である。 FIG. 5 is a sectional view showing the operator side arc contactor 13 and the opposite side arc contactor 14 after the current breaking operation.

図４に示した状態の後、絶縁ロッド３、中空ロッド１７、シリンダ１８、操作器側主接触子１１、操作器側アーク接触子１３、操作器側アーク接触子カバー１５、及び絶縁ノズル１６は、遮断方向に移動し続け、図５に示した状態で停止する。これらの移動が停止すると、電流の遮断動作が完了する。 After the state shown in FIG. 4, the insulating rod 3, the hollow rod 17, the cylinder 18, the operator-side main contact 11, the operator-side arc contact 13, the operator-side arc contact cover 15, and the insulating nozzle 16 are , continue to move in the blocking direction and stop in the state shown in FIG. When these movements stop, the current interruption operation is completed.

図６は、本実施例によるガス遮断器において、電流の遮断動作の開始から完了までの熱パッファ室１９の圧力を解析した結果の一例を示すグラフである。図６には、対向側アーク接触子中間部１４Ｂの直径が、対向側アーク接触子先端部１４Ａの直径に対し、１００％である（対向側アーク接触子先端部１４Ａの直径と等しい）場合の解析結果４５と、１１０％である（対向側アーク接触子先端部１４Ａの直径の１．１倍である）場合の解析結果４６と、１２０％である場合の解析結果４７と、１３０％である場合の解析結果４８を示している。 FIG. 6 is a graph showing an example of the results of analyzing the pressure in the heat puffer chamber 19 from the start to the end of the current interruption operation in the gas circuit breaker according to this embodiment. In FIG. 6, the diameter of the opposing arc contact middle portion 14B is 100% of the diameter of the opposing arc contact tip 14A (equal to the diameter of the opposing arc contact tip 14A). Analysis result 45, analysis result 46 when it is 110% (1.1 times the diameter of the opposing arc contact tip 14A), analysis result 47 when it is 120%, and 130% 4 shows an analysis result 48 for the case.

図６において、横軸は、遮断動作中の時間を示す。時刻ｔ１は、電流の遮断動作の開始時点であり、ガス遮断器は図２に示した状態にある。時刻ｔ２は、操作器側アーク接触子１３と対向側アーク接触子１４が互いに開離した直後の時点であり、ガス遮断器は図３に示した状態にある。時刻ｔ３は、電流ゼロ点の時点であり、ガス遮断器は図４に示した状態にある。時刻ｔ４は、電流の遮断動作の完了時点であり、ガス遮断器は図５に示した状態にある。 In FIG. 6, the horizontal axis indicates the time during the blocking operation. Time t1 is the start of the current interruption operation, and the gas circuit breaker is in the state shown in FIG. Time t2 is the time point immediately after the arc contact 13 on the operator side and the arc contact 14 on the opposing side are separated from each other, and the gas circuit breaker is in the state shown in FIG. Time t3 is the current zero point, and the gas circuit breaker is in the state shown in FIG. Time t4 is the time when the current interruption operation is completed, and the gas circuit breaker is in the state shown in FIG.

図６において、縦軸は、電流の遮断動作の開始時点である時刻ｔ１からの、熱パッファ室１９の圧力の上昇割合を示す。縦軸の目盛りは、解析結果４５（対向側アーク接触子中間部１４Ｂの直径が対向側アーク接触子先端部１４Ａの直径と等しい場合）において、時刻ｔ１（電流の遮断動作の開始時点）から時刻ｔ３（電流ゼロ点の時点）までに熱パッファ室１９の圧力が増加した割合を１００％としている。 In FIG. 6, the vertical axis indicates the rate of increase in the pressure of the heat puffer chamber 19 from time t1, which is the start point of the current interruption operation. The scale of the vertical axis is from time t1 (starting point of current interruption operation) to time The rate at which the pressure in the heat puffer chamber 19 increases by t3 (time point of zero current) is defined as 100%.

図６の解析結果は、絶縁ノズルスロート部１６Ｂの内径が、対向側アーク接触子先端部１４Ａの直径の１４０％とした場合に得られた結果である。絶縁ノズルスロート部１６Ｂの内径は、任意に定めることができるが、操作器側アーク接触子１３と対向側アーク接触子１４の形状や操作器１の駆動力などを考慮して、対向側アーク接触子先端部１４Ａの直径の１３０％から１５０％の範囲で最適なものを選択するのが好ましい。 The analysis results shown in FIG. 6 were obtained when the inner diameter of the insulating nozzle throat portion 16B was set to 140% of the diameter of the opposing arc contact tip portion 14A. Although the inner diameter of the insulating nozzle throat portion 16B can be determined arbitrarily, considering the shapes of the operator side arc contactor 13 and the opposing side arc contactor 14, the driving force of the operator 1, etc., the opposing side arc contact It is preferable to select the most suitable one within the range of 130% to 150% of the diameter of the tip 14A.

図６に示すように、対向側アーク接触子先端部１４Ａの直径を基準として、対向側アーク接触子中間部１４Ｂの直径が１１０％から１３０％であり、絶縁ノズルスロート部１６Ｂの内径が１４０％である場合には、時刻ｔ３（電流ゼロ点の時点）における熱パッファ室１９の圧力は、１１７％から１５４％の範囲に増加した。すなわち、対向側アーク接触子中間部１４Ｂの直径が、対向側アーク接触子先端部１４Ａの直径よりも大きいと、熱パッファ室１９の圧力が増加し、絶縁媒体３２の圧力が上昇することがわかる。 As shown in FIG. 6, the diameter of the opposing arc contact intermediate portion 14B is 110% to 130% of the diameter of the opposing arc contact tip portion 14A, and the inner diameter of the insulating nozzle throat portion 16B is 140%. , the pressure in the heat puffer chamber 19 at time t3 (at the current zero point) increased from 117% to 154%. That is, when the diameter of the opposing arc contact intermediate portion 14B is larger than the diameter of the opposing arc contact tip portion 14A, the pressure in the heat puffer chamber 19 increases and the pressure in the insulating medium 32 increases. .

対向側アーク接触子中間部１４Ｂの直径は、電流遮断に最適な熱パッファ室１９のガス圧力に合わせて決定することができる。対向側アーク接触子中間部１４Ｂの直径を適切に定めることで、図３に示した状態（操作器側アーク接触子１３と対向側アーク接触子１４が互いに開離した直後の状態）で、熱パッファ室１９の圧力すなわち絶縁媒体３２の圧力が電流遮断に適する圧力になるように制御することができる。 The diameter of the opposing arc contact intermediate portion 14B can be determined according to the optimum gas pressure in the heat puffer chamber 19 for current interruption. By appropriately setting the diameter of the opposing-side arc contact intermediate portion 14B, in the state shown in FIG. The pressure in the puffer chamber 19, that is, the pressure in the insulating medium 32 can be controlled so as to be suitable for current interruption.

また、対向側アーク接触子中間部１４Ｂの軸方向の位置や長さを変えることにより、アーク３１が発生してから対向側アーク接触子中間部１４Ｂが絶縁ノズルスロート部１６Ｂを抜け出す（軸方向における絶縁ノズルスロート部１６Ｂの存在範囲内から出る）までの時間を変えることができる。従って、対向側アーク接触子中間部１４Ｂの軸方向の位置や長さを変えることで、熱パッファ室１９の圧力（すなわち絶縁媒体３２の圧力）を制御することができる。 In addition, by changing the axial position and length of the opposing arc contact intermediate portion 14B, the opposing arc contact intermediate portion 14B escapes from the insulating nozzle throat portion 16B after the arc 31 is generated. It is possible to change the time until the nozzle exits from the existence range of the insulating nozzle throat portion 16B. Therefore, the pressure in the heat puffer chamber 19 (that is, the pressure in the insulating medium 32) can be controlled by changing the axial position and length of the opposing arc contact intermediate portion 14B.

本実施例によるガス遮断器を設計する際には、例えば以下のような手順に従うのが好ましい。初めに、絶縁ノズル１６と対向側アーク接触子１４を除く構成部品の形状や大きさなどの仕様を決める。次に、対向側アーク接触子先端部１４Ａと絶縁ノズル下流部１６Ｃを電流遮断に最適な形状と大きさに定める。そして、熱パッファ室１９の圧力が電流遮断時に必要な圧力となるように、絶縁ノズルスロート部１６Ｂと対向側アーク接触子中間部１４Ｂの形状と大きさを定める。 When designing the gas circuit breaker according to this embodiment, it is preferable to follow, for example, the following procedure. First, specifications such as the shape and size of components other than the insulating nozzle 16 and the opposing arc contactor 14 are determined. Next, the opposing arc contact tip portion 14A and the insulating nozzle downstream portion 16C are determined to have the optimum shape and size for current interruption. Then, the shape and size of the insulating nozzle throat portion 16B and the opposite side arc contact middle portion 14B are determined so that the pressure in the heat puffer chamber 19 becomes the pressure required when the current is interrupted.

本実施例によるガス遮断器は、以上のような構成を備え、電流の遮断動作時に絶縁媒体３２の圧力を効率的に上昇させ、アーク３１を効率的に消弧することができる。さらに、本実施例によるガス遮断器は、アーク３１の熱エネルギーを利用して絶縁媒体３２の圧力を上昇させるので、操作器１の操作力を向上させなくても遮断性能を向上でき、操作器１の駆動力を低減可能である。 The gas circuit breaker according to this embodiment has the configuration described above, and can efficiently increase the pressure of the insulating medium 32 and efficiently extinguish the arc 31 during the current interruption operation. Furthermore, the gas circuit breaker according to the present embodiment utilizes the thermal energy of the arc 31 to increase the pressure of the insulating medium 32, so that the breaking performance can be improved without increasing the operating force of the operating device 1. 1 driving force can be reduced.

図７から図１０を用いて、本発明の実施例２によるガス遮断器を説明する。本実施例によるガス遮断器は、実施例１によるガス遮断器とほぼ同様の構成を備えるが、パッファ室の構成が異なる。以下では、本実施例によるガス遮断器について、実施例１によるガス遮断器と異なる点を主に説明する。 A gas circuit breaker according to a second embodiment of the present invention will be described with reference to FIGS. 7 to 10. FIG. The gas circuit breaker according to this embodiment has substantially the same configuration as the gas circuit breaker according to the first embodiment, but differs in the configuration of the puffer chamber. In the following, the gas circuit breaker according to this embodiment will be mainly described in terms of differences from the gas circuit breaker according to the first embodiment.

実施例１によるガス遮断器では、シリンダ１８の内部は、図２に示すように、逆止弁２０によって熱パッファ室１９と機械パッファ室２１に区切られている。 In the gas circuit breaker according to the first embodiment, the interior of the cylinder 18 is divided into a thermal puffer chamber 19 and a mechanical puffer chamber 21 by a check valve 20 as shown in FIG.

図７は、本実施例によるガス遮断器において、電流の遮断動作前の電極を示す断面図である。本実施例によるガス遮断器では、シリンダ１８の内部に機械パッファ室２１のみが存在し、熱パッファ室１９と逆止弁２０が存在しない。本実施例によるガス遮断器は、対向側アーク接触子１４と絶縁ノズル１６は、実施例１によるガス遮断器と同じ構成を備える。 FIG. 7 is a cross-sectional view showing the electrode before current interruption operation in the gas circuit breaker according to the present embodiment. In the gas circuit breaker according to this embodiment, only the mechanical puffer chamber 21 exists inside the cylinder 18, and the thermal puffer chamber 19 and the check valve 20 do not exist. The gas circuit breaker according to the present embodiment has the opposing arc contact 14 and the insulating nozzle 16 of the same configuration as the gas circuit breaker according to the first embodiment.

図８は、本実施例によるガス遮断器において、電流の遮断動作時に互いに開離した直後の操作器側アーク接触子１３と対向側アーク接触子１４を示す断面図である。対向側アーク接触子中間部１４Ｂは、対向側アーク接触子先端部１４Ａと対向側アーク接触子末尾部１４Ｃよりも太い。絶縁ノズル１６は、絶縁ノズルスロート部１６Ｂでの内径が、絶縁ノズル上流部１６Ａと絶縁ノズル下流部１６Ｃでの内径よりも小さい。そして、操作器側アーク接触子１３と対向側アーク接触子１４が互いに開離したときには、対向側アーク接触子中間部１４Ｂは、少なくともその一部が軸方向における絶縁ノズルスロート部１６Ｂの存在範囲内に位置する。 FIG. 8 is a cross-sectional view showing the arc contact 13 on the operator side and the arc contact 14 on the opposing side immediately after they are separated from each other during current interruption operation in the gas circuit breaker according to this embodiment. The opposing arc contact intermediate portion 14B is thicker than the opposing arc contact tip portion 14A and the opposing arc contact tail portion 14C. The insulating nozzle 16 has an inner diameter at the insulating nozzle throat portion 16B that is smaller than the inner diameters at the insulating nozzle upstream portion 16A and the insulating nozzle downstream portion 16C. When the operator-side arc contactor 13 and the opposing-side arc contactor 14 are separated from each other, at least a part of the opposing-side arc contactor intermediate portion 14B is within the existence range of the insulating nozzle throat portion 16B in the axial direction. Located in

図９は、本実施例によるガス遮断器において、電流ゼロ点での操作器側アーク接触子１３と対向側アーク接触子１４を示す断面図である。アーク３１が消弧されて電流が遮断された電流ゼロ点では、対向側アーク接触子先端部１４Ａは、絶縁ノズルスロート部１６Ｂから抜けており、軸方向における絶縁ノズル下流部１６Ｃの存在範囲内に位置するか、絶縁ノズル１６よりも対向側に位置する。 FIG. 9 is a sectional view showing the operator side arc contactor 13 and the opposed side arc contactor 14 at the zero current point in the gas circuit breaker according to this embodiment. At the current zero point where the arc 31 is extinguished and the current is interrupted, the opposing arc contact tip 14A is out of the insulating nozzle throat 16B and is within the range of existence of the insulating nozzle downstream 16C in the axial direction. or located on the opposite side of the insulating nozzle 16 .

図１０は、本実施例によるガス遮断器において、電流の遮断動作後の操作器側アーク接触子１３と対向側アーク接触子１４を示す断面図である。 FIG. 10 is a cross-sectional view showing the operator-side arc contactor 13 and the opposed-side arc contactor 14 after the current breaking operation in the gas circuit breaker according to this embodiment.

本実施例によるガス遮断器でも、図８に示すように、アーク３１が発生しているときには、対向側アーク接触子中間部１４Ｂと絶縁ノズルスロート部１６Ｂとの間を通って絶縁ノズル下流部１６Ｃに流出する絶縁媒体３２の量を減少させることができるとともに、図９に示すように、アーク３１を消弧するときには、アーク３１に多量の絶縁媒体３２を吹き付けることができる。このため、本実施例によるガス遮断器では、機械パッファ室２１の圧力をより大きく上昇させて絶縁媒体３２の圧力を効率的に上昇させることができ、アーク３１を効率的に消弧することができる。 In the gas circuit breaker according to this embodiment as well, as shown in FIG. 8, when the arc 31 is generated, the insulating nozzle downstream portion 16C passes between the opposing arc contact middle portion 14B and the insulating nozzle throat portion 16B. In addition, as shown in FIG. 9, when extinguishing the arc 31, a large amount of the insulating medium 32 can be blown to the arc 31. Therefore, in the gas circuit breaker according to the present embodiment, the pressure in the mechanical puffer chamber 21 can be increased to a greater extent, the pressure in the insulating medium 32 can be increased efficiently, and the arc 31 can be extinguished efficiently. can.

対向側アーク接触子中間部１４Ｂの直径、軸方向の位置、及び軸方向の長さを変えることで、機械パッファ室２１の圧力を制御し、絶縁媒体３２の圧力が電流遮断に適する圧力になるように制御することができる。また、対向側アーク接触子先端部１４Ａの直径を適切な値に設計することで、図９に示した状態において、絶縁ノズル下流部１６Ｃと対向側アーク接触子先端部１４Ａとの隙間を流れる絶縁媒体３２ｂの量を、電流の遮断動作に対して最適な値に設定することができる。 By changing the diameter, axial position, and axial length of the opposing arc contact intermediate portion 14B, the pressure in the mechanical puffer chamber 21 is controlled, and the pressure in the insulating medium 32 becomes a pressure suitable for current interruption. can be controlled as follows. Also, by designing the diameter of the opposing arc contact tip 14A to an appropriate value, in the state shown in FIG. The amount of medium 32b can be set to an optimum value for current interrupting operation.

本実施例によるガス遮断器を設計する際は、実施例１によるガス遮断器を設計する際の手順に加えて、以下の点を考慮する必要がある。すなわち、機械パッファ室２１の圧力によって、シリンダ１８、中空ロッド１７、及び絶縁ロッド３に対して操作器１の駆動力と反対方向の力が発生して遮断動作が遅くなることを考慮して、電流ゼロ点における操作器側アーク接触子１３と対向側アーク接触子１４との位置関係と機械パッファ室２１の圧力を決定する必要がある。 When designing the gas circuit breaker according to this embodiment, in addition to the procedure for designing the gas circuit breaker according to the first embodiment, it is necessary to consider the following points. In other words, considering that the pressure in the mechanical puffer chamber 21 causes the cylinder 18, the hollow rod 17, and the insulating rod 3 to generate a force in the direction opposite to the driving force of the operating device 1, and the interrupting operation is slowed down, It is necessary to determine the positional relationship between the operator side arc contactor 13 and the opposed side arc contactor 14 and the pressure in the mechanical puffer chamber 21 at the current zero point.

なお、本発明は、上記の実施例に限定されるものではなく、様々な変形が可能である。例えば、上記の実施例は、本発明を分かりやすく説明するために詳細に説明したものであり、本発明は、必ずしも説明した全ての構成を備える態様に限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成に置き換えることが可能である。また、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成の一部について、削除したり、他の構成を追加・置換したりすることが可能である。 It should be noted that the present invention is not limited to the above embodiments, and various modifications are possible. For example, the above embodiments have been described in detail in order to facilitate understanding of the present invention, and the present invention is not necessarily limited to aspects having all the described configurations. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is possible to delete a part of the configuration of each embodiment, or to add or replace another configuration.

１…操作器、２…充填容器、３…絶縁ロッド、４…操作器側導体、５…対向側導体、１１…操作器側主接触子、１２…対向側主接触子、１３…操作器側アーク接触子、１４…対向側アーク接触子、１４Ａ…対向側アーク接触子先端部、１４Ｂ…対向側アーク接触子中間部、１４Ｃ…対向側アーク接触子末尾部、１５…操作器側アーク接触子カバー、１６…絶縁ノズル、１６Ａ…絶縁ノズル上流部、１６Ｂ…絶縁ノズルスロート部、１６Ｃ…絶縁ノズル下流部、１７…中空ロッド、１８…シリンダ、１９…熱パッファ室、２０…逆止弁、２１…機械パッファ室、３１…アーク、３２…絶縁媒体、３２ａ、３２ｂ…絶縁媒体の流れを示す矢印、４５…対向側アーク接触子中間部の直径が対向側アーク接触子先端部の直径に対し１００％である場合の解析結果、４６…対向側アーク接触子中間部の直径が対向側アーク接触子先端部の直径に対し１１０％である場合の解析結果、４７…対向側アーク接触子中間部の直径が対向側アーク接触子先端部の直径に対し１２０％である場合の解析結果、４８…対向側アーク接触子中間部の直径が対向側アーク接触子先端部の直径に対し１３０％である場合の解析結果。 DESCRIPTION OF SYMBOLS 1... Operator, 2... Filling container, 3... Insulating rod, 4... Operator-side conductor, 5... Opposite-side conductor, 11... Operator-side main contact, 12... Opposite-side main contact, 13... Operator-side Arc contact 14 Opposite arc contact 14A Opposite arc contact tip 14B Opposite arc contact middle part 14C Opposite arc contact trailing edge 15 Operator side arc contact Cover 16 Insulated nozzle 16A Insulated nozzle upstream part 16B Insulated nozzle throat part 16C Insulated nozzle downstream part 17 Hollow rod 18 Cylinder 19 Thermal puffer chamber 20 Check valve 21 ... Mechanical puffer chamber 31 ... Arc 32 ... Insulating medium 32a, 32b ... Arrows indicating the flow of insulating medium 45 ... The diameter of the middle part of the arc contact on the opposite side is 100 with respect to the diameter of the tip part of the arc contact on the opposite side %, 46...Analysis result when the diameter of the opposing arc contact intermediate portion is 110% of the diameter of the opposing arc contact tip end, 47...Analysis result of the opposing arc contact intermediate portion Analysis results when the diameter is 120% of the diameter of the tip of the arc contact on the opposite side, 48 ... When the diameter of the intermediate part of the arc contact on the opposite side is 130% of the diameter of the tip of the arc contact on the opposite side analysis result.

Claims

a filling container filled with an insulating medium;
an operating device provided on one end side in the axial direction;
an operator-side main contact and an opposing-side main contact arranged opposite to each other in the axial direction inside the filling container;
an operator-side arc contact located on the one end side inside the filling container and movable in the axial direction by a driving force from the operator;
A facing side arc contact located on the other end side in the axial direction inside the filling container, facing the operating device side arc contact in the axial direction, and capable of contacting and separating from the operating device side arc contact. and,
an insulating nozzle positioned radially outside the arc contact on the operating device side and the arc contact on the opposite side and movable in the axial direction by a driving force from the operating device;
with
The opposed-side arc contact extends in the axial direction, and includes a tip portion positioned on the one end side, a tail portion positioned on the other end side, and an intermediate portion positioned between the tip portion and the tail portion. and
the intermediate portion has a shape that is thicker than the tip portion and the tail portion and does not contact the insulating nozzle;
A gas circuit breaker characterized by:

The insulating nozzle extends in the axial direction and has an upstream portion located on the one end side, a downstream portion located on the other end side, and a throat portion located between the upstream portion and the downstream portion. prepared,
In the throat portion, an inner peripheral portion of the insulating nozzle is located inside the upstream portion and the downstream portion in the radial direction,
The intermediate portion of the opposing arc contact does not contact the throat portion,
The gas circuit breaker according to claim 1.

At least a part of the intermediate portion of the opposing arc contact falls within the existence range of the throat portion in the axial direction when the operator-side arc contact and the opposing arc contact are separated from each other. To position,
The gas circuit breaker according to claim 2.

The tip portion of the opposing arc contact is positioned within the existence range of the downstream portion of the insulating nozzle in the axial direction at the zero current point, or is positioned on the other end side of the insulating nozzle,
The gas circuit breaker according to claim 2.