JPH0265020A - Hydrodynamic operating device for switching apparatus - Google Patents

Abstract

PURPOSE:To enable to prevent a wrong operation and to obtain an operating device of high reliability by using two solenoid valves, the starting points of the trouble causing operation, hydro-dynamically in parallel. CONSTITUTION:A solenoid valve 17 is formed of an electromagnet 2 and a circuit opening valve 3, has the same structure as a solenoid valve 1, and is directly connected with the solenoid valve 1 adjoining in parallel to it. If circuit opening signals are provided in the closed state, the current flows to the coils of both electromagnets 2 of the solenoid valves 1, 17, and a movable core attempts to move downward together with the circuit opening valve 3. In case one pair of the electromagnet 3 and the circuit opening valve 3 disposed underneath the electromagnet 3 become immovable, the pressure of the hydraulic oil under the circuit opening valve 3 is immediately lowered by the normal action of the other pair of the electromagnet 2 and the circuit opening valve 3. Accordingly, a scavenge valve 8 is opened, an oil feeding valve 9 is closed, the back pressure (e) of a piston 11 is lowered, the piston 11 moves to the left, and a movable contact shoe 13 is opened. As a result, the disconnector is normally operated so as to be in the state of open circuit. When the circuit closing action is performed, the same operation is applied to solenoid valves 4, 18. Accordingly, high reliability in the operation can be obtained.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、電力用遮断器などの接触子を駆動する開閉
機器の流体式操作装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fluid operating device for a switching device that drives a contact such as a power circuit breaker.

〔従来の技術〕[Conventional technology]

第２図は、例えば、三菱電機技報第５１巻、第９号（１
９７７）第６１８頁の図７に示された従来の油圧式操作
装置と同一構造（分り易くするため、一部部品を省略し
ているが、原理的には同一）の操作装置の動作原理を示
す断面図であり、遮断器の駆動装置に用いられた例であ
る。Figure 2 shows, for example, Mitsubishi Electric Technical Report Vol. 51, No. 9 (1
977) The operating principle of an operating device having the same structure as the conventional hydraulic operating device shown in FIG. 7 on page 618 (some parts are omitted for clarity, but the principle is the same) FIG. 3 is a cross-sectional view showing an example of the device used in a circuit breaker drive device.

図において、（１］は開路用電磁弁で、開路用電磁石（
２１と開路用弁（３）とより成る。（４）は閉路用電磁
弁で、開路用電磁石（５）と閉路用弁（６）とより成る
。（１）は逆止弁であり、図で左の方向にのみ作動油が
流れる。（８）は排油弁で、給油弁（９）と互に押し合
っている。αＧは油圧シリンダー、（ロ）は油圧ピスト
ン、（２）は連結機構であり、その先端には遮断部の可
動接触子（至）が接続されている。（ロ）はアキュムレ
ータ。In the figure, (1) is the opening solenoid valve, and the opening electromagnet (
21 and a circuit opening valve (3). (4) is a closing solenoid valve, which is composed of a circuit opening electromagnet (5) and a closing valve (6). (1) is a check valve, and hydraulic oil flows only in the left direction in the figure. (8) is an oil drain valve, which is pushed against the oil supply valve (9). αG is a hydraulic cylinder, (b) is a hydraulic piston, and (2) is a coupling mechanism, the tip of which is connected to the movable contact (to) of the interrupting section. (b) is an accumulator.

（至）は低圧油タンク、α・は電動機付の油ポンプであ
る。(to) is a low-pressure oil tank, and α is an oil pump with an electric motor.

次に、このような構成をもつ流体式操作装置の動作を説
明する。第２図は、遮断器の閉路状態を示す。図におい
て、低圧油タンク（イ）の作動油（ａｌが油ポンプαＱ
により加圧されて、アキュムレータα４中に押し込まれ
、アキュムレータα４内の窒素ガス（ｂ）が圧縮されて
いる。このため、弁類（３１＋６１　（７１＋８１やピ
ストンαＤなどで閉じられた部分の作動油（ｅ）は高圧
に保たれている。Next, the operation of the fluid operating device having such a configuration will be explained. FIG. 2 shows the circuit breaker in a closed state. In the figure, the hydraulic oil (al) in the low-pressure oil tank (a) is oil pump αQ.
is pressurized and pushed into the accumulator α4, and the nitrogen gas (b) in the accumulator α4 is compressed. For this reason, the hydraulic oil (e) in the portions closed by the valves (31+61 (71+81), piston αD, etc.) is maintained at a high pressure.

ここで、開路信号が開路用電硼石（２）のコイルに流れ
ると、電磁石の可動鉄心が下方に動き、開路用弁（３）
が下に押されて開く。そのため、開路用弁（３）の下部
で排油弁（８）の背後の作動油（ｄ）が低圧タンク（至
）へ流れる。この部分は細管で高圧部と連結されている
だけなので圧力が下るので、排油弁（８）及び給油弁（
９）が高圧油の力で上方に動き、排油弁（８）が開くと
ともに給油弁（９）が閉じ、ピストンα力の背後の作動
油（ｅｌ）が排出され低圧となる。従って、ピストン０
］）はアキュレータＱ◆から供給される高圧油により左
方に動かされ、連結機構（２）を介して可動接触子（２
）を開いて、遮断器は開路状態になる。低圧タンク（ト
）に入った作動油は油ポンプαｅにより加圧されてアキ
ュムレータα４内ニ戻ル。Here, when the circuit opening signal flows to the coil of the circuit opening jade stone (2), the movable core of the electromagnet moves downward, and the circuit opening valve (3) moves downward.
is pushed down to open. Therefore, the hydraulic oil (d) below the opening valve (3) and behind the oil drain valve (8) flows to the low pressure tank (to). Since this part is only connected to the high pressure part with a thin tube, the pressure will drop, so the oil drain valve (8) and the oil supply valve (
9) moves upward by the force of high-pressure oil, the oil drain valve (8) opens and the oil supply valve (9) closes, and the hydraulic oil (el) behind the piston α force is discharged and becomes low pressure. Therefore, piston 0
]) is moved to the left by high pressure oil supplied from the accurator Q◆, and the movable contact (2) is moved to the left via the coupling mechanism (2).
), the circuit breaker becomes open. The hydraulic oil in the low pressure tank (G) is pressurized by the oil pump αe and returned to the accumulator α4.

こうして、開路状態になった遮断器は、図示していない
が、次のように同様な動作で閉路し、第２図の状態に返
る。即ち、閉路用ｗ、礎石（５）のコイルに閉路信号が
流れると、閉路用！ｉ石（５）の鉄心が下方に動き閉路
用弁（６）が開く。そのため、閉路用弁（６）の下部の
高圧油が、逆止弁（７）を通って流れ排油弁（８）の背
後の作動油（ｄ）が高圧になるので、排油弁（８）及び
給油弁（９）が高圧油の力で下方に動き、排油弁（８）
が閉じるとともに、給油弁（９）が開き、ピストンα９
の背後の作動油（ｅ）が高圧になる。従って、ピストン
（ロ）はアキュムレータＱ４から続いて供給される高圧
油により右方に動かされ、連結機構（６）を介して、可
動接触子（２）を閉じて、遮断器が閉路状態になる。ア
キュムレータＱ４から流れ出た高圧油を補給するため、
低圧タンク（至）内の作動油が油ポンプαＱによりアキ
ュムレータα→中に送り込まれる。Although not shown, the circuit breaker which has been opened in this way is closed in the same manner as described below, returning to the state shown in FIG. 2. In other words, when a closing signal flows through the coil of the cornerstone (5) for closing w, it is for closing! The iron core of the i-stone (5) moves downward and the circuit closing valve (6) opens. Therefore, the high pressure oil at the lower part of the closing valve (6) flows through the check valve (7) and the hydraulic oil (d) behind the oil drain valve (8) becomes high pressure. ) and the oil supply valve (9) move downward by the force of high pressure oil, and the oil drain valve (8)
closes, the oil supply valve (9) opens, and the piston α9
The hydraulic oil (e) behind becomes high pressure. Therefore, the piston (B) is moved to the right by high pressure oil continuously supplied from the accumulator Q4, and via the coupling mechanism (6), closes the movable contact (2) and the circuit breaker is brought into a closed state. . In order to replenish the high pressure oil flowing out from accumulator Q4,
The hydraulic oil in the low pressure tank (to) is sent into the accumulator α→ by the oil pump αQ.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来の流体式操作装置は以上のように構成されており、
最初に短時間で高速に動作する必要のある電磁弁、即ち
電磁石と開路用弁あるいは閉路用弁との組合せ部分は小
形で小さな力で動作させる必要のある精密部品とならざ
るを得ず、可動部に働く摩擦力や固着力により、動作遅
延や動作不能を起し易く、開閉機器の開閉動作の不良の
原因となることが多かった。The conventional fluid operating device is configured as described above.
First, solenoid valves that need to operate at high speed in a short time, that is, the combination of an electromagnet and a valve for opening or closing a circuit, must be small precision parts that must be operated with small force, and must be movable. Frictional forces and adhesion forces acting on the parts tend to cause operational delays or inoperability, and are often the cause of poor opening/closing operations of opening/closing equipment.

この発明はこのような問題を解決するためになされたも
ので、このような不良動作を防ぎ、信頼性の高い操作装
置を得ることを目的とする。The present invention was made to solve these problems, and aims to prevent such malfunctions and provide a highly reliable operating device.

〔課題を解決するための手段〕[Means to solve the problem]

この発明に係る開閉機器の流体式操作装置は、電磁弁を
流体的に並列に、複数個を互に近接して設け、ｗＬ出弁
が次の動作部に対して流体を流入させる形の場合は、逆
止弁を介して互の電磁弁を接続する。In the fluid operation device for opening/closing equipment according to the present invention, a plurality of solenoid valves are provided in parallel and close to each other, and the wL outlet valve allows fluid to flow into the next operating part. connects the solenoid valves to each other via a check valve.

〔作用〕[Effect]

この発明における開閉機器の流体式操作装置では、万一
、ある電磁弁の動作が不良となった時、並列の電磁弁が
正常に動作すれば引続く動作が行なわれる。即ち、引続
いて動作する排油弁や給油弁などは大形の部品で操作力
も大きく、摩擦力などによる不良動作を生じることはま
ず無く、操作装置全体の動作は正常に行われる確率が高
いからである。電磁弁は互に近接しているので流体の流
入排出時の時間遅れも殆んどない。又、電磁弁が次の動
作部に流体を流入させる形の場合にも、逆止弁があるの
で一つの電磁弁が不良動作をしても、他の電磁弁の作用
に悪影響を及ぼさない。In the fluid operating device for opening/closing equipment according to the present invention, if a certain solenoid valve malfunctions, the subsequent operation will be performed if the parallel solenoid valves operate normally. In other words, the oil drain valve, oil supply valve, etc. that operate subsequently are large parts and require a large operating force, so malfunctions due to frictional forces are unlikely to occur, and there is a high probability that the entire operating device will operate normally. It is from. Since the solenoid valves are close to each other, there is almost no time delay when fluid flows in and out. Furthermore, even if the solenoid valve is of a type that allows fluid to flow into the next operating part, since there is a check valve, even if one solenoid valve malfunctions, it will not adversely affect the operations of the other solenoid valves.

〔発明の実施例〕[Embodiments of the invention]

以下、この発明の一実施例を図について説明する。第１
図はこの発明を遮断器に実施した例の断面図である。図
において、（１）〜α・は従来と同様である。Ｑ″ｈは
電磁弁で、電磁石（２）と開路用弁（３）から成り、電
磁弁（υと同構造で、並列に隣接して直結されている。An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a sectional view of an example in which the present invention is implemented in a circuit breaker. In the figure, (1) to α· are the same as the conventional one. Q″h is a solenoid valve, consisting of an electromagnet (2) and a valve for opening the circuit (3), which has the same structure as the solenoid valve (υ) and is directly connected to the solenoid valve (υ) in parallel.

（至）は電磁弁でｗＬ礎石（５）と閉路用弁（６）から
成り、電磁弁（４）と同構造で、並列に隣接して設けら
れ、連絡路に逆止弁（＋１が用いられている。(to) is a solenoid valve consisting of a wL cornerstone (5) and a closing valve (6).It has the same structure as the solenoid valve (4), and is installed in parallel and adjacent to it. It is being

このように構成されたものにおいて、例えば、第１図の
閉路状態の時に開路信号が与えられると。In a device configured in this manner, for example, if an open circuit signal is applied during the closed circuit state shown in FIG.

電磁弁（υＱ″ｈの両方の電磁石（２）のコイルに電流
が流れ、可動鉄心は開路用弁（３）とともに下方に動こ
うとする。この峙、万一、電磁石（２）とその下の開路
用弁（３）の−組が摩擦や弁の固着などにより動作遅延
や動作不能が生じたとしても、他の［ｉ石（２）と開路
弁（３）の組が正常に動作すれば開路弁（３）の下の作
動油の圧力が直ちに低下する。これによって、排油弁（
８）が開き、給油弁（９）が閉じ、ピストンαυの背圧
（６）が下り、ピストンａηが左に動き、可動接触子時
が開き、遮断器は正常に動作して開路状態になる。Current flows through the coils of both electromagnets (2) of the solenoid valve (υQ″h), and the movable core tries to move downward together with the opening valve (3). Even if the set of opening valve (3) is delayed or unable to operate due to friction or sticking of the valve, the other set of opening valve (2) and opening valve (3) may operate normally. In this case, the pressure of the hydraulic oil under the opening valve (3) immediately decreases.
8) opens, the oil supply valve (9) closes, the back pressure (6) of the piston αυ decreases, the piston aη moves to the left, the movable contact opens, and the circuit breaker operates normally and becomes open. .

こうして開路状態になった遮断器は１図示していないが
、次のような動作で閉路動作を行う。この時も、閉路信
号が与えられた時、電磁弁（４１（ハ）の両方の［ＥＢ
石（５）に１π流が流れ、その鉄心は閉路弁［６１とと
もに下方に仰１こうとする。この時、万一電磁石（５）
とその下の閉路弁（６）の−組が摩擦や弁の固着などの
ため動作しなかったり、動作が遅れても、他の９磁石（
５）と閉路弁（６）の組が正常に動作すれば、閉路用弁
（６）から逆止弁（７）又はｒｍを通って、排油弁（８
）の背後に作動油が流れ、排油弁（８）を閉じ、給油弁
（９）を開く。この時、逆比弁（７１，Ｏｎがあるため
、たとえ１片方の閉路用弁（６）が半開状態になったと
しても、一方の閉路用弁（６）から高圧油が排油弁背後
（ｄ）に送られ、排油弁（Ｐｉが閉じ、給油弁が開く。Although not shown in the figure, the circuit breaker which has become open in this manner performs the following operation to close the circuit. At this time, when the closing signal is given, both [EB
A 1π current flows through the stone (5), and its iron core tries to rise downward together with the closing valve [61]. At this time, in case the electromagnet (5)
If the closing valve (6) and the closing valve (6) below it do not operate due to friction or sticking of the valve, or even if the operation is delayed, the other 9 magnets (
5) and the closing valve (6) operate normally, the drain valve (8) passes from the closing valve (6) through the check valve (7) or rm.
), the hydraulic oil flows behind the oil drain valve (8) and opens the oil supply valve (9). At this time, since there is a reverse ratio valve (71, On), even if one of the closing valves (6) is in a half-open state, high-pressure oil will flow from one of the closing valves (6) to the back of the oil drain valve ( d), the oil drain valve (Pi closes, and the oil supply valve opens).

従って、ピストンαυの背後の作動油（６）の圧力が上
り、ピストン０１）が右に動き遮断器は閉路状態になる
。排油弁（８１や給油弁（９）は大形で、動作力も大き
いため、動作不良を生じることは殆んどなく、閉路用弁
（６）が正常に動けば５遍断器はまず正常動作を行うの
で、動作の高信頼性が得られる。Therefore, the pressure of the hydraulic oil (6) behind the piston αυ increases, causing the piston 01) to move to the right and the circuit breaker to close. The oil drain valve (81) and the oil supply valve (9) are large in size and have a large operating force, so they rarely malfunction, and if the closing valve (6) operates normally, the 5-displacer will operate normally. Since the operation is performed, high reliability of operation can be obtained.

上記の例で、電磁石のコイルは開路用、閉路用とも２個
あるので、２個のコイルの一方が断線を生じた時にも、
他方の電磁石は正常に動作するので信頼性が向上する。In the above example, the electromagnet has two coils, one for opening and one for closing, so even if one of the two coils becomes disconnected,
The other electromagnet operates normally, improving reliability.

上記の例では、開路用及び閉路用とも電磁弁を２個並列
に用いたが、遮断器の動作として重要な開路用のみ２個
の電磁弁を用い閉路用は１個のみとしてもよい。その場
合には、閉路用は１個の電磁弁の電磁石の上に更にもう
１個の電磁石を種み重ねる方法を採ってもよい。一つの
電磁石のコイルの断線があっても、もう一つのコイルが
正常であれば、閉路用弁（６）が開かれ閉路動作が正常
に続行されることが多く、信頼性が向上すル。In the above example, two solenoid valves are used in parallel for both opening and closing, but two solenoid valves may be used only for opening, which is important for the operation of the circuit breaker, and only one for closing. In that case, for circuit closing, a method may be adopted in which another electromagnet is stacked on top of the electromagnet of one solenoid valve. Even if one electromagnet coil is disconnected, if the other coil is normal, the circuit closing valve (6) is often opened and circuit closing operation continues normally, improving reliability.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれば、開閉機器の流体式操
作装置において、小形で小さな力で動作し、最もデリケ
ートな構造でトラブルが多い、動作の開始点である電磁
弁を２個流体的に並列に用いること蚤こしたので、万一
、片方が不良動作をしても、他の電磁弁により操作装置
としては正常動作を行うことが可能であり、信頼性の亮
い操作装置を得ることができる。As described above, according to the present invention, two solenoid valves, which are small, operate with small force, have the most delicate structure and are the starting point of operation, and which are the starting point of operation in a fluid operation device for switching equipment can be operated using fluid. Since the solenoid valves are used in parallel, even if one of them malfunctions, the other solenoid valve can still operate normally as an operating device, resulting in a highly reliable operating device. be able to.

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

第１図はこの発明の一実施例による遮断器の流体式操作
装置の断面図、第２図は従来の流体式操作装置の断面図
である。（１）（４）ση（ト）は電磁弁、（３）は開
路弁、（６）は開路弁、（８）は排油弁、（９）は投入
弁。 （至）は可動接触子である。 なお、各図中同一符号は同−又は相当部分を示す。FIG. 1 is a sectional view of a hydraulic operating device for a circuit breaker according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional hydraulic operating device. (1) (4) ση (g) is a solenoid valve, (3) is an open circuit valve, (6) is an open circuit valve, (8) is an oil drain valve, and (9) is a supply valve. (to) is a movable contact. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] （１）信号を与えられて動作する電磁石と弁とより成る
電磁弁を動作させて、加圧流体の流入あるいは流出を行
い接触子の開閉動作を開始する開閉機器の流体式操作装
置において、開路用あるいは閉路用いずれかの電磁弁、
又は開路用及び閉路用のそれぞれの電磁弁について、同
様構造の電磁弁ブロックを複数個、流体的に並列に、近
接して配置し、加圧流体を流入させて次段作動部を動作
させる電磁弁においては次段作動部の方向へのみ流れを
許す逆止弁を介して接続し、加圧流体を排出して次の部
品を動作させる電磁弁においては、直接接続したことを
特徴とする開閉機器の流体式操作装置。(1) In a fluid operating device for a switchgear device that operates a solenoid valve consisting of an electromagnet and a valve that operates in response to a signal, pressurized fluid flows in or out, and starts the opening/closing operation of a contact. Solenoid valve for either circuit or closing,
Alternatively, for each of the solenoid valves for opening and closing, a plurality of solenoid valve blocks of the same structure are arranged fluidly in parallel and close to each other, and a solenoid that operates the next stage actuating part by flowing pressurized fluid. In valves, the valve is connected via a check valve that allows flow only in the direction of the next operating part, and in the case of solenoid valves that discharge pressurized fluid to operate the next part, it is characterized by a direct connection. Fluid operating device for equipment.