JPS6352412B2 - - Google Patents
Info
- Publication number
- JPS6352412B2 JPS6352412B2 JP57114288A JP11428882A JPS6352412B2 JP S6352412 B2 JPS6352412 B2 JP S6352412B2 JP 57114288 A JP57114288 A JP 57114288A JP 11428882 A JP11428882 A JP 11428882A JP S6352412 B2 JPS6352412 B2 JP S6352412B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- port
- pressure oil
- closing
- hydraulically operated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005086 pumping Methods 0.000 description 11
- 238000010008 shearing Methods 0.000 description 10
- 239000000872 buffer Substances 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Description
【発明の詳細な説明】
この発明はしや断器が保持すべきポンピング動
作防止機構を備えたしや断器用の油圧操作回路に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic operating circuit for a shear breaker, which is provided with a pumping operation prevention mechanism to be maintained by the shear breaker.
従来から、高電圧、高電流をしや断、投入する
ために、しや断器が使用されている。このしや断
器においては、高速度で高電圧接触子を移動させ
なければならないことから、その操作に油圧を用
いるのが最近の傾向である。そしてこの油圧の操
作回路は通常、しや断器を操作する油圧シリンダ
ー、油圧シリンダーに操作用の圧油を送る主弁、
主弁に操作用の圧油を送る操作弁、操作弁を駆動
する投入用ソレノイド弁およびしや断用ソレノイ
ド弁にて構成される。 BACKGROUND OF THE INVENTION Conventionally, cut-off switches have been used to cut off and turn on high voltage and high current. Since the high-voltage contact must be moved at high speed in this shingle disconnector, the recent trend is to use hydraulic pressure for its operation. This hydraulic operation circuit usually includes a hydraulic cylinder that operates the shatter breaker, a main valve that sends pressure oil for operation to the hydraulic cylinder,
It consists of an operating valve that sends operating pressure oil to the main valve, a closing solenoid valve that drives the operating valve, and a shearing solenoid valve.
ところが、従来のこの種油圧回路では、ポンピ
ングと呼ばれる油圧シリンダーの異常動作が起こ
る。これは投入指令よりしや断指令のほうが優先
されているため、投入指令の継続中にしや断指令
が出た場合、油圧シリンダーがしや断動作を行う
ものの、投入指令が残つている場合には、このた
めにしや断動作直後に再び投入動作を行い、いず
れか一方の指令が解除されるまでこれを繰り返す
現象であり、しや断器もしくはその油圧操作回路
の破損の原因となる。 However, in this type of conventional hydraulic circuit, an abnormal operation of the hydraulic cylinder called pumping occurs. This is because the shrunken command has priority over the closing command, so if the shrunken command is issued while the closing command is continuing, the hydraulic cylinder performs the shrunken operation, but if the closing command remains. For this reason, the closing operation is performed again immediately after the shearing operation, and this is repeated until one of the commands is released, which can cause damage to the shearing breaker or its hydraulic operating circuit.
またガスしや断器、例えばパツフア形のガスし
や断器ではパツフアシリンダー内の消弧流体
（SF6ガス等）をパツフアシリンダーあるいはピ
ストンを動かすことにより圧縮して圧力を高め、
その高圧の消弧流体をアークに吹き付けて消弧す
る。したがつて、このしや断器ではパツフアシリ
ンダー内の圧力を十分に高める必要があるから、
投入動作の途中でしや断指令が出た場合、単純に
しや断指令を優先させるものであると、投入動作
の途中からしや断動作に移り、場合によつてはパ
ツフアシリンダー内の圧力が十分に上らず、投入
の先行放電により発生したアークを消弧できず、
しや断不能と云う重大事故につながる恐れがあ
る。このようなことから、投入動作の途中でしや
断指令が出された場合には、投入動作の完全終了
を待つてしや断動作を開始するものでないと、安
定したパツフア圧力が得られず、従つて高い信頼
性も得られない。 In addition, in gas cylinders and disconnectors, such as gas cylinders and disconnectors, the pressure is increased by compressing the arc-extinguishing fluid (SF 6 gas, etc.) in the puffer cylinder by moving the puffer cylinder or piston.
The high-pressure arc-extinguishing fluid is sprayed onto the arc to extinguish it. Therefore, it is necessary to sufficiently increase the pressure inside the puffer cylinder in this case.
If a shrunken command is issued in the middle of the closing operation, if the command is simply prioritized, the shrunken operation will shift from the middle of the closing operation, and in some cases the pressure inside the puffer cylinder will increase. does not rise sufficiently, and the arc generated by the preceding discharge cannot be extinguished.
This may lead to a serious accident that cannot be stopped. For this reason, if a shrunken command is issued in the middle of a closing operation, stable puffer pressure cannot be obtained unless the closing operation is started immediately after the closing operation is completely completed. , therefore high reliability cannot be obtained.
本発明は、しや断指令優先の原側を崩すことな
くポンピング動作を防止するとともに、投入動作
中にしや断指令が出た場合には投入動作の完了を
待つてしや断動作を行う油圧操作回路を提供する
ものである。 The present invention prevents the pumping operation without destroying the origin of the shearing command priority, and also provides hydraulic pressure that performs the shedding operation after waiting for the completion of the closing operation if the shearing command is issued during the closing operation. It provides an operating circuit.
本発明の油圧操作回路は、主弁に操作用の圧油
を送る操作弁に、主弁操作用圧油の制御手段とし
て油圧作動切換弁を設け、その操作室とこれに接
続される投入用ソレノイド弁との間に、前記操作
室に流入する圧油を油圧シリンダーの投入動作時
間経過後に開放するリリーフ機構を設け、これに
より投入用ソレノイド弁にて発せられた油圧投入
指令が投入動作終了後に油圧作動切換弁において
自動的に消滅し、投入指令としや断指令とが実質
的に重ならないようにしてポンピングを防止せし
めるとともに、油圧作動切換弁において投入指令
が消滅するまではしや断指令の有無にかかわらず
その操作室に圧油が流入しつづけるようにして投
入動作を完了まで確実に行わしめるのである。 In the hydraulic operation circuit of the present invention, a hydraulic operation switching valve is provided as a control means for the main valve operation pressure oil on the operation valve that sends operating pressure oil to the main valve, and the operation chamber and the input switch connected to the operation chamber are provided with a hydraulic operation switching valve as a control means for the main valve operation pressure oil. A relief mechanism is provided between the solenoid valve to release the pressure oil flowing into the operation chamber after the closing operation time of the hydraulic cylinder has elapsed, so that the hydraulic pressure input command issued by the closing solenoid valve is released after the closing operation is completed. It automatically disappears in the hydraulically actuated switching valve, prevents pumping by preventing the closing command from substantially overlapping with the shearing cut command, and also prevents pumping from occurring until the closing command disappears in the hydraulically actuated switching valve. Pressure oil continues to flow into the operation chamber regardless of the presence or absence of the valve, thereby ensuring that the closing operation is completed.
なお、本発明の油圧操作回路においては、投入
動作完了後は油圧作動切換弁の操作室の圧油が開
放されてしまうので、油圧作動切換弁に投入状態
を維持するための自己保持機構を付設する必要が
ある。この自己保持機構はしや断指令優先の原側
を維持することから、しや断用ソレノイド弁の動
作により直ちに解除されるようにしておくことが
必要である一方、投入動作中に油圧作動切換弁の
操作室へ流入する圧油がしや断指令によつて開放
されないように、リリーフ機構に対して独立に設
けることも必要である。 In addition, in the hydraulic operation circuit of the present invention, since the pressure oil in the operation chamber of the hydraulically operated switching valve is released after the closing operation is completed, a self-holding mechanism is attached to the hydraulically operated switching valve to maintain the closed state. There is a need to. Since this self-holding mechanism maintains the source side where the shear cutoff command is given priority, it is necessary to be able to release it immediately by the operation of the shear cutoff solenoid valve. It is also necessary to provide an independent relief mechanism so that the pressure oil flowing into the operation chamber of the valve is not released by a cut-off command.
以下、図に掲げる実施例に基づいて本発明を詳
しく説明する。 Hereinafter, the present invention will be explained in detail based on embodiments shown in the figures.
図において、１はしや断器、２はしや断器１を
操作する油圧シリンダー、３は油圧シリンダー２
に操作用の圧油を送る主弁、４は主弁３に操作用
の圧油を送る操作弁、５および６は操作弁４を駆
動する投入用ソレノイド弁およびしや断用ソレノ
イド弁をそれぞれ表わしている。 In the figure, 1 is a bridge and disconnector, 2 is a hydraulic cylinder that operates the bridge and disconnector 1, and 3 is a hydraulic cylinder 2.
4 is an operating valve that sends operating pressure oil to the main valve 3, and 5 and 6 are a closing solenoid valve and a shrunken solenoid valve that drive the operating valve 4, respectively. It represents.
主弁３はＰポート、Ａポート、Ｒポートを有す
る３ポート２位置切換弁の一種で、ＰポートとＡ
ポート間の開閉を司るポペツト弁７、ポペツト弁
７の操作ピストン８、ＡポートとＲポート間の開
閉を司るポペツト弁９ならびに、操作ピストン８
およびポペツト弁９の操作室１０等を有する。主
弁３のＰポートには油圧シリンダー２のロツド側
と、圧油の供給源であるアキユムレーター１１と
が接続され、Ａポートは油圧シリンダー２のボア
側に接続する。 The main valve 3 is a type of 3-port 2-position switching valve that has a P port, an A port, and an R port.
Poppet valve 7 that controls opening and closing between ports, operating piston 8 of poppet valve 7, poppet valve 9 that controls opening and closing between A port and R port, and operating piston 8
and an operation chamber 10 for the poppet valve 9. The P port of the main valve 3 is connected to the rod side of the hydraulic cylinder 2 and an accumulator 11 which is a supply source of pressure oil, and the A port is connected to the bore side of the hydraulic cylinder 2.
操作弁４はＰポート、Ａポート、Ｒポートを有
する４つの油圧作動の３ポート２位置切換弁１２
１〜１２4を有し、前記リリーフ機構は第２、第３
の油圧作動切換弁１２2，１２3を主体に構成さ
れ、自己保持機構は第４の油圧作動切換弁１２4
を主体に構成される。 The operating valves 4 are four hydraulically operated 3-port 2-position switching valves 12 having a P port, an A port, and an R port.
1 to 12 4 , and the relief mechanism has second and third
The self-holding mechanism is mainly composed of hydraulically operated switching valves 12 2 and 12 3 , and the self-holding mechanism is a fourth hydraulically operated switching valve 12 4 .
It is mainly composed of.
第１の油圧作動切換弁１２1は、ＰポートとＡ
ポート間の開閉を司るボール弁１３、Ａポートと
Ｒポート間の開閉を司るボール弁１４、ボール弁
１３，１４の操作ピストン１５を具有し、更に２
つの操作室１６1，１６2等を有する。この弁１２
１のＰポートには圧油の供給源１７が接続され、
Ａポートは主弁３の操作室１０と、第４の油圧作
動切換弁１２4のＰポートとに接続する。 The first hydraulically operated switching valve 121 has a P port and an A port.
It has a ball valve 13 that controls opening and closing between the ports, a ball valve 14 that controls opening and closing between the A port and the R port, and an operation piston 15 for the ball valves 13 and 14.
It has two operation chambers 16 1 , 16 2 , etc. This valve 12
A pressure oil supply source 17 is connected to the P port of 1 ,
The A port is connected to the operation chamber 10 of the main valve 3 and the P port of the fourth hydraulically operated switching valve 12 4 .
第２の油圧作動切換弁１２2は、ＰポートとＡ
ポート間の開閉と、ＡポートとＲポート間の開閉
とを司るボール弁１８、ボール弁１８の操作ピス
トン１９、およびその操作室２０等で構成する。
この弁１２2のＰポートには投入用ソレノイド弁
５が接続され、Ａポートは第１の油圧作動切換弁
１２1の操作室１６1に接続する。 The second hydraulically operated switching valve 122 has a P port and an A port.
It is composed of a ball valve 18 that controls opening and closing between ports and opening and closing between the A port and the R port, an operation piston 19 of the ball valve 18, an operation chamber 20 thereof, and the like.
The closing solenoid valve 5 is connected to the P port of this valve 12 2 , and the A port is connected to the operation chamber 16 1 of the first hydraulically operated switching valve 12 1 .
第３の油圧作動切換弁１２3は、ＰポートとＡ
ポート間の開閉を司るボール弁２１、Ａポートと
Ｒポート間の開閉を司るボール弁２２、ボール弁
２１，２２の操作ピストン２３、およびその操作
室２４等を有し、ボール弁２２と操作ピストン２
３のロツドとは操作室２４に圧油の入らない状態
で距離ｄはなれ、操作ピストン２３が応答してか
ら、ボール弁２１，２２が動作するまでの間に遅
れ時間が介在するようにしてある。この遅れ時間
は油圧シリンダー２の投入動作開始から投入動作
終了までの時間（投入動作時間）と同一かこれよ
りやや長い程度に設定され、前記距離ｄはこの遅
れ時間が確保できるよう、後記絞り弁２６の絞り
量との関係から決定される。この第３の油圧作動
切換弁１２3のＰポートには圧油の供給源１７が
接続され、Ａポートは第２の油圧作動切換弁１２
２の操作室２０に接続し、操作室２４には投入用
ソレノイド弁５が、逆止弁２５を並列接続した絞
り弁２６を介して接続される。 The third hydraulically operated switching valve 12 3 is connected to the P port and the A port.
It has a ball valve 21 that controls opening and closing between the ports, a ball valve 22 that controls opening and closing between the A port and the R port, an operation piston 23 for the ball valves 21 and 22, an operation chamber 24 thereof, etc., and the ball valve 22 and the operation piston. 2
The rod of No. 3 is separated by a distance d with no pressure oil entering the operation chamber 24, and there is a delay time between the response of the operation piston 23 and the operation of the ball valves 21 and 22. . This delay time is set to be the same as or slightly longer than the time from the start of the closing operation to the end of the closing operation (closing operation time) of the hydraulic cylinder 2, and the distance d is set so that the above-mentioned distance d is set to the throttle valve described later. It is determined from the relationship with the aperture amount of 26. A pressure oil supply source 17 is connected to the P port of this third hydraulically operated switching valve 123 , and the A port is connected to the second hydraulically operated switching valve 12.
The closing solenoid valve 5 is connected to the operation chamber 24 via a throttle valve 26 to which a check valve 25 is connected in parallel.
第４の油圧作動切換弁１２4は、第２の油圧作
動切換弁１２2と実質的に同じもので、ボール弁
２７、操作ピストン２８および操作室２９等を有
し、そのＰポートには前述したとおり第１の油圧
作動切換弁１２1のＡポートが接続し、Ａポート
は同油圧作動切換弁１２1の今１つの操作室１６2
に接続し、操作室２９にはしや断用ソレノイド弁
６が接続される。 The fourth hydraulically operated switching valve 12 4 is substantially the same as the second hydraulically operated switching valve 12 2 and has a ball valve 27, an operating piston 28, an operating chamber 29, etc., and its P port has the aforementioned As shown above, the A port of the first hydraulically operated switching valve 12 1 is connected, and the A port is connected to the other operation chamber 16 2 of the first hydraulically operated switching valve 12 1 .
A solenoid valve 6 for cutting off the shield is connected to the operation chamber 29.
次に、この油圧操作回路の動作を説明する。 Next, the operation of this hydraulic operation circuit will be explained.
第１図はしや断器１がしや断状態の場合を示し
ている。そこで今、投入用ソレノイド弁５を励磁
すると、この弁５が左側へ移動し、圧油を第２の
油圧作動切換弁１２2のＰポートからＡポートを
経て第１の油圧作動切換弁１２1の操作室１６1に
送る。これにより第１の油圧作動切換弁１２1の
操作ピストン１５がバネとボール弁１３への油圧
に打ち勝つて左側へ移動し、ＰポートとＡポート
とを連通するので共給源１７からの圧油がＰポー
トからＡポートを経て主弁３の操作室１０と第４
の油圧作動切換弁１２4のＰポートとに送られる。 FIG. 1 shows a case where the sheath disconnector 1 is in the sheath disconnection state. Therefore, when the closing solenoid valve 5 is energized now, this valve 5 moves to the left, and the pressure oil is transferred from the P port of the second hydraulically operated switching valve 12 2 to the A port to the first hydraulically operated switching valve 12 1 Send it to the control room 16 1 . As a result, the operating piston 15 of the first hydraulically operated switching valve 121 overcomes the spring and the hydraulic pressure applied to the ball valve 13 and moves to the left, communicating the P port and the A port, so that the pressure oil from the common supply source 17 is From the P port to the A port, the control chamber 10 of the main valve 3 and the fourth
and the P port of the hydraulically operated switching valve 124 .
主弁３の操作室１０に送られた圧油は、操作ピ
ストン８をバネ３０に抗して左側に移動させポペ
ツト弁７を開放してＰポートとＡポート間を連通
する。ＰポートとＡポート間が連通されることに
より、アキユムレーター１１に蓄えられていた圧
油が油圧シリンダー２のボア側に入り、油圧シリ
ンダー２はロツド側よりボア側のほうが受圧面積
が大きいからピストンを高速で左側へ移動させ、
しや断器１が投入される。 The pressure oil sent to the operating chamber 10 of the main valve 3 moves the operating piston 8 to the left against the spring 30, opens the poppet valve 7, and communicates between the P port and the A port. By communicating between the P port and the A port, the pressure oil stored in the accumulator 11 enters the bore side of the hydraulic cylinder 2, and the hydraulic cylinder 2 has a larger pressure-receiving area on the bore side than the rod side, so the piston cannot be moved. Move to the left at high speed,
The breaker 1 is turned on.
一方、第４の油圧作動切換弁１２4のＰポート
に送られた圧油は、ＰポートとＡポートとが図の
ように連通されているのでＡポートを経て第１の
油圧作動切換弁１２1の操作室１６2に入り、操作
ピストン１５を更に左側へ押しＲポートを閉塞し
た位置を保持する。 On the other hand, the pressure oil sent to the P port of the fourth hydraulically operated switching valve 124 passes through the A port to the first hydraulically operated switching valve 12 because the P port and the A port are communicated as shown in the figure. 1 into the operating chamber 16 2 and push the operating piston 15 further to the left to maintain the position where the R port is closed.
そしてしや断器１の投入動作の途中で図示しな
い補助開閉器が切り換ることにより、投入指令を
与える電気回路が開路され投入用ソレノイド弁５
が消磁されるが、上記操作ピストン１５は操作室
１６2の圧油によりこの位置に自己保持されるの
で、投入用ソレノイド弁５の消磁にも拘わらず主
弁３の操作室１０に圧油が保持され、しや断器１
を投入状態に維持する。 Then, during the closing operation of the breaker 1, an auxiliary switch (not shown) switches, thereby opening the electric circuit that gives the closing command and closing the closing solenoid valve 5.
is demagnetized, but since the operating piston 15 is self-held in this position by the pressure oil in the operation chamber 162 , there is no pressure oil in the operation chamber 10 of the main valve 3 despite the demagnetization of the closing solenoid valve 5. Retained and cut off 1
is maintained in the on state.
またシリンダー２のピストンが左側に移動して
止まると、油圧シリンダー２のボア側の圧力はア
キユムレーター１１および主弁３の操作室１０内
の圧力と同一値になり、バネ３０の力によりポペ
ツト弁７および操作ピストン８は右側に復帰し、
主弁３のＰポートとＡポート間は閉塞される。こ
のときポペツト弁９はバネ３１の力によりＲポー
トを閉塞している。 When the piston of the cylinder 2 moves to the left and stops, the pressure on the bore side of the hydraulic cylinder 2 becomes the same value as the pressure in the accumulator 11 and the operation chamber 10 of the main valve 3, and the force of the spring 30 causes the poppet valve 7 to and the operating piston 8 returns to the right side,
The area between the P port and the A port of the main valve 3 is closed. At this time, the poppet valve 9 closes the R port by the force of the spring 31.
なお、第１の油圧作動切換弁１２1の操作室１
６1および１６2の受圧面積はそれぞれボール弁１
３の受圧面積より大きくして、ボール弁１３の左
方向よりかかる油圧に抗して操作ピストン１５が
左側に移動し得るようにすることが必要である。 In addition, the operation chamber 1 of the first hydraulically operated switching valve 12 1
The pressure receiving areas of 6 1 and 16 2 are respectively ball valve 1
3, so that the operation piston 15 can move to the left against the hydraulic pressure applied from the left side of the ball valve 13.
他方、投入用ソレノイド弁５から送出された圧
油の一部は絞り弁２６を経て第３の油圧作動切換
弁１２3の操作室２４に入り、操作ピストン２３
を左側へ移動させる。しかるに、操作ピストン２
３のロツトとボール弁２２との間に距離ｄをと
り、少なくとも油圧シリンダー２の投入動作終了
まではボール弁２１，２２が左側へ移動しないよ
うにしているから、油圧シリンダー２の投入動作
が完全に終了してからボール弁２１，２２が操作
ピストン２３によつて左側へ移動し、供給源１７
からの圧油をＰポートからＡポートを経て第２の
油圧作動切換弁１２2の操作室２０に送る。その
結果、第２の油圧作動切換弁１２2の操作ピスト
ン１９が左側へ移動し、ＰポートとＡポート間を
閉塞し、ＡポートとＲポートとを連通するので第
１の油圧作動切換弁１２1の操作室１６1内の圧油
をＡポート、Ｒポートを経てタンクへ戻す。操作
室１６1の圧油がタンクに開放されても、今１つ
の操作室１６2には圧油が残つているから、ピス
トン１５は左方に押されたままとなり、しや断器
１は投入状態を保持し、しや断動作に入ることは
ない。 On the other hand, a part of the pressure oil sent out from the closing solenoid valve 5 passes through the throttle valve 26 and enters the operating chamber 24 of the third hydraulically operated switching valve 12 3 , and enters the operating piston 23 .
move to the left. However, the operation piston 2
A distance d is provided between the rod No. 3 and the ball valve 22 to prevent the ball valves 21 and 22 from moving to the left at least until the closing operation of the hydraulic cylinder 2 is completed, so that the closing operation of the hydraulic cylinder 2 is completely completed. After the ball valves 21 and 22 are moved to the left by the operating piston 23, the supply source 17
Pressure oil is sent from the P port to the operation chamber 20 of the second hydraulically operated switching valve 12 2 via the A port. As a result, the operating piston 19 of the second hydraulically operated switching valve 12 2 moves to the left, closing between the P port and the A port, and communicating between the A port and the R port, so that the first hydraulically operated switching valve 12 Control room 16 of 1 Returns the pressure oil in 1 to the tank via the A port and R port. Even if the pressure oil in the operation chamber 16 1 is released to the tank, there is still pressure oil left in the operation chamber 16 2 , so the piston 15 remains pushed to the left, and the breaker 1 is closed. It maintains the closed state and does not enter into the closing operation.
しや断器１を投入状態からしや断状態に切換え
るには、まずしや断用ソレノイド弁６を励磁し、
圧油を第４の油圧作動切換弁１２4の操作室２９
に供給して操作ピストン２８を左側へ移動させて
Ｐポートをボール弁２７で閉塞し、ＡポートとＲ
ポートを連通して第１の油圧作動切換弁１２1の
操作室１６2にある圧油をタンクに開放すると、
ボール弁１３，１４に作用する油圧により操作ピ
ストン１５は右側に移動しＡポートとＲポートを
連通しＰポートを閉塞するので、主弁３の操作室
１０にある圧油を第１の油圧作動切換弁１２1の
ＡポートからＲポートを経てタンクに開放する。
油圧シリンダー２のボア側には圧油が蓄えられて
いるので、この力によつてポペツト弁９はバネ３
１に打ち勝つて急速に右側に移動して主弁３のＡ
ポートとＲポートを連通し、油圧シリンダー２の
ボア側の圧油を主弁３のＡポートからＲポートを
経てタンクに開放する。油圧シリンダー２のロツ
ド側にはアキユムレーター１１から圧油が常時供
給されているのでボア側の圧油がタンクに開放さ
れると、ピストンは圧力差により急速に右側に移
動し、しや断器１はしや断動作を行いしや断状態
に切り換わる。 To switch the shield breaker 1 from the closed state to the shut-off state, first energize the shield cut-off solenoid valve 6,
The pressure oil is transferred to the operation chamber 29 of the fourth hydraulically operated switching valve 124 .
The operation piston 28 is moved to the left, the P port is closed with the ball valve 27, and the A port and R
When the ports are communicated and the pressure oil in the operation chamber 16 2 of the first hydraulically operated switching valve 12 1 is released to the tank,
The operating piston 15 moves to the right side by the hydraulic pressure acting on the ball valves 13 and 14, communicates the A port and the R port, and closes the P port, so that the pressure oil in the operating chamber 10 of the main valve 3 is transferred to the first hydraulically operated valve. It opens to the tank from the A port of the switching valve 12 1 through the R port.
Pressure oil is stored on the bore side of the hydraulic cylinder 2, so this force causes the poppet valve 9 to move against the spring 3.
1, quickly move to the right and turn A of main valve 3.
The port and R port are communicated, and the pressure oil on the bore side of the hydraulic cylinder 2 is released from the A port of the main valve 3 to the tank via the R port. Pressure oil is constantly supplied to the rod side of the hydraulic cylinder 2 from the accumulator 11, so when the pressure oil on the bore side is released to the tank, the piston rapidly moves to the right due to the pressure difference, and the breaker 1 Performs cutting action and switches to cutting state.
ところでもし、このしや断動作のときに投入指
令が残つているとすると、しや断動作終了後に投
入動作が開始され、ポンピングを発生させるが、
この油圧操作回路では上述した如く第１の油圧作
動切換弁１２1の操作室１６1の圧油が投入指令の
有無にかかわらず投入動作終了とともに第２の油
圧作動切換弁１２2によつて自動的に開放され、
投入指令が解除されたのと同じ状態に保持される
ので、しや断動作終了後に投入動作が開始される
ことはない。すなわち、ポンピング動作が確実に
防止されるのである。 By the way, if a closing command remains during this shearing operation, the closing operation will start after the shearing operation is finished, and pumping will occur.
In this hydraulic operation circuit, as described above, the pressure oil in the operation chamber 16 1 of the first hydraulically operated switching valve 12 1 is automatically turned on by the second hydraulically operated switching valve 12 2 upon completion of the closing operation, regardless of whether there is a closing command or not. opened to the public,
Since the same state as when the closing command is released is maintained, the closing operation is not started after the shearing operation is completed. In other words, pumping action is reliably prevented.
また、投入動作中にしや断用ソレノイド弁６が
励磁された場合は、第１の油圧作動切換弁１２1
の操作室１６2に入つた圧油は第４の油圧作動切
換弁１２4によりタンクへ開放されるものの、少
なくとも投入動作終了までは操作室１６1の圧油
が第２の油圧作動切換弁１２2によつてタンクへ
開放される危険はなく、操作室１６1には投入用
ソレノイド弁５および絞り弁２６を経て圧油が入
り続けて操作ピストン１５を左側端に保持し油圧
シリンダー２が投入動作を終了するまで完全に作
動する。油圧シリンダー２の投入動作が終了する
と、上述したとおり操作室１６1の圧油が第２の
油圧作動切換弁１２2によつてタンクに開放され、
操作室１６2の圧油も既にしや断用ソレノイド弁
６が励磁された時点でタンクに開放されているか
ら、直ちにしや断動作が行われ、更に投入動作終
了後、操作室１６1の圧油が自動的にタンクに開
放されているので、投入指令がしや断動作終了後
もなお残つていてもポンピング動作に発展するこ
ともない。 In addition, if the solenoid valve 6 for cutting off is energized during the closing operation, the first hydraulically operated switching valve 12 1
Although the pressure oil that has entered the operation chamber 16 2 is released to the tank by the fourth hydraulically operated switching valve 12 4 , the pressure oil in the operating chamber 16 1 is released to the tank by the fourth hydraulically operated switching valve 12 4 . 2 , there is no danger of it being released to the tank, and pressure oil continues to enter the operation chamber 16 1 via the closing solenoid valve 5 and the throttle valve 26, and the hydraulic cylinder 2 is closed while holding the operating piston 15 at the left end. It works perfectly until it stops working. When the closing operation of the hydraulic cylinder 2 is completed, the pressure oil in the operation chamber 16 1 is released to the tank by the second hydraulic operation switching valve 12 2 as described above.
Since the pressurized oil in the operation chamber 16 2 has already been released to the tank when the solenoid valve 6 for shedding is energized, the shearing operation is performed immediately, and after the closing operation is completed, the pressure oil in the operation chamber 16 1 is released. Since the pressure oil is automatically released into the tank, even if the input command remains even after the cut-off operation is completed, it will not develop into a pumping operation.
なお、図の実施例では油圧作動切換弁１２1〜
１２4をボール弁形式のものとしているが、チエ
ツク弁形式あるいはスプール弁形式のものに変更
してもよいことは言うまでもない。 In the illustrated embodiment, the hydraulically operated switching valves 12 1 -
124 is of a ball valve type, but it goes without saying that it may be changed to a check valve type or a spool valve type.
また、油圧作動切換弁１２1の自己保持機構は、
油圧作動切換弁１２4と油圧作動切換弁１２1の操
作室を２つにすることとによつて構成してある
が、これに限定するものではなく、例えば油圧作
動切換弁１２1に別の油圧作動切換弁を機構的に
連結するもの等であつてもよい。 In addition, the self-holding mechanism of the hydraulically operated switching valve 12 1 is as follows:
Although the hydraulically operated switching valve 124 and the hydraulically operated switching valve 121 have two operating chambers, the present invention is not limited to this . It may also be something that mechanically connects a hydraulically operated switching valve.
また、リリーフ機構、主弁３についても第１の
実施例に限定されるものでないことは言うまでも
ない。 Furthermore, it goes without saying that the relief mechanism and the main valve 3 are not limited to those of the first embodiment.
以上の説明から明らかなように、本発明はしや
断指令優先の原則を残したままポンピング動作を
防止するものであるから、安全性を阻害すること
なくしや断器乃至その油圧操作回路の破損防止を
図るとともに、投入動作中にしや断指令が出た場
合に投入動作の完了を待つて直ちにしや断動作を
行うものであるから、例えばパツフア形しや断器
の油圧操作回路に適用して常に十分なパツフア圧
力が得られ、確実な消弧動作を行なわしめて、投
入動作時の安全性を著しく高める効果がある。 As is clear from the above explanation, since the present invention prevents pumping operation while retaining the principle of giving priority to the cutoff command, it is possible to prevent damage to the cutoff switch or its hydraulic operation circuit without impeding safety. In addition to trying to prevent this, if a shrunken command is issued during a closing operation, the shrunken operation is performed immediately after waiting for the closing operation to complete, so it can be applied, for example, to the hydraulic operation circuit of a puffer shape or disconnector. Sufficient puffer pressure can always be obtained, ensuring reliable arc-extinguishing operation and significantly increasing safety during closing operation.
しかも、本発明はポンピング防止としや断動作
の待機とを１つのリリーフ機構で行うから、その
機構が簡単なのは勿論のこと、このリリーフ機構
と自己保持機構とを操作弁の側に設けているか
ら、構造上大きな比重を占める主弁の構造複雑化
が回避され、簡単な回路でポンピング防止としや
断動作の待機とを行なわしめるのである。更に、
主弁に構造上の制約がないことから、その動作が
単純高速化され、主弁における一時的な油圧回路
の短絡も防止できて、圧油の大量放出を防止する
のにも本発明は有効である。 Moreover, since the present invention prevents pumping and waits for the sheath disconnection operation with a single relief mechanism, the mechanism is of course simple, and the relief mechanism and self-holding mechanism are provided on the side of the operating valve. This avoids complicating the structure of the main valve, which accounts for a large amount of structural importance, and prevents pumping and waits for the sheath cutting operation with a simple circuit. Furthermore,
Since there are no structural restrictions on the main valve, its operation is simple and faster, and it is also possible to prevent temporary short circuits in the hydraulic circuit in the main valve, making the present invention effective in preventing large amounts of pressure oil from being released. It is.
第１図は本発明を実施した油圧操作回路の１例
を示す回路図である。
図中、１：しや断器、２：油圧シリンダー、
３：主弁、４：操作弁、５：投入用ソレノイド
弁、６：しや断用ソレノイド弁、１２1〜１２4：
油圧作動切換弁。
FIG. 1 is a circuit diagram showing an example of a hydraulic operation circuit embodying the present invention. In the figure, 1: breaker, 2: hydraulic cylinder,
3: Main valve, 4: Operation valve, 5: Closing solenoid valve, 6: Shrinking solenoid valve, 12 1 to 12 4 :
Hydraulically operated switching valve.
Claims (1)
該油圧シリンダー２に操作用の圧油を送る主弁３
と、該主弁３に操作用の圧油を送る操作弁４とを
有するしや断器１の油圧操作回路において、前記
操作弁４に主弁操作用圧油の制御手段として２つ
の操作室１６1，１６2を有する第１の油圧作動切
換弁１２1を設け、その一方の操作室１６1とこれ
に接続する投入用ソレノイド弁５との間に、操作
室１６1への圧油を開閉する第２の油圧作動切換
弁１２2と第２の油圧作動切換弁１２2を操作し前
記操作室１６1内の圧油を前記油圧シリンダー２
の投入動作時間経過後に開放するリリーフ機構を
有する第３の油圧作動切換弁１２3とを設け、他
方の操作室１６2に操作弁４より主弁３に操作用
圧油を供給する管路より分岐し、かつしや断用ソ
レノイド弁６にて操作される第４の油圧作動切換
弁１２4により開閉される分岐管路を接続したこ
とを特徴とするしや断器の油圧操作回路。1 a hydraulic cylinder 2 that operates the breaker 1;
A main valve 3 that sends operating pressure oil to the hydraulic cylinder 2
and an operating valve 4 that sends operating pressure oil to the main valve 3, the operating valve 4 has two operating chambers as control means for the main valve operating pressure oil. A first hydraulically operated switching valve 12 1 having valves 16 1 and 16 2 is provided, and pressure oil is supplied to the operation chamber 16 1 between one of the operation chambers 16 1 and the closing solenoid valve 5 connected thereto. The second hydraulically operated switching valve 12 2 that opens and closes and the second hydraulically operated switching valve 12 2 are operated to transfer the pressure oil in the operation chamber 16 1 to the hydraulic cylinder 2 .
A third hydraulically actuated switching valve 12 3 is provided with a relief mechanism that opens after the closing operation time of 1. A hydraulic operation circuit for a shank disconnector, characterized in that a branch pipe is connected to the branch pipe line, which is opened and closed by a fourth hydraulically operated switching valve 12 4 operated by a shank disconnection solenoid valve 6 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11428882A JPS595520A (en) | 1982-06-30 | 1982-06-30 | Hydraulic operation circuit for breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11428882A JPS595520A (en) | 1982-06-30 | 1982-06-30 | Hydraulic operation circuit for breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS595520A JPS595520A (en) | 1984-01-12 |
| JPS6352412B2 true JPS6352412B2 (en) | 1988-10-19 |
Family
ID=14634093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11428882A Granted JPS595520A (en) | 1982-06-30 | 1982-06-30 | Hydraulic operation circuit for breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS595520A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0833510A (en) * | 1994-07-26 | 1996-02-06 | Osaka Bijiyou Kogyo Kk | String clasp |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5322261A (en) * | 1976-08-11 | 1978-03-01 | Toushiyo Kk | Device for piling sheets |
| JPS5519020A (en) * | 1978-07-24 | 1980-02-09 | Kyoei Zoki Kk | Fish tank |
-
1982
- 1982-06-30 JP JP11428882A patent/JPS595520A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5322261A (en) * | 1976-08-11 | 1978-03-01 | Toushiyo Kk | Device for piling sheets |
| JPS5519020A (en) * | 1978-07-24 | 1980-02-09 | Kyoei Zoki Kk | Fish tank |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0833510A (en) * | 1994-07-26 | 1996-02-06 | Osaka Bijiyou Kogyo Kk | String clasp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS595520A (en) | 1984-01-12 |
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