JPS61215872A - Actuator for valve - Google Patents

Actuator for valve

Info

Publication number
JPS61215872A
JPS61215872A JP5548885A JP5548885A JPS61215872A JP S61215872 A JPS61215872 A JP S61215872A JP 5548885 A JP5548885 A JP 5548885A JP 5548885 A JP5548885 A JP 5548885A JP S61215872 A JPS61215872 A JP S61215872A
Authority
JP
Japan
Prior art keywords
valve
passage
actuator
speed
hydraulic oil
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.)
Pending
Application number
JP5548885A
Other languages
Japanese (ja)
Inventor
Takayuki Ohira
大平　孝行
Yoshitaka Muto
武藤　貴敬
Koichi Otani
幸一 大谷
Akio Fukunaga
福永　昭男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
KYB Corp
Original Assignee
Kayaba Industry Co Ltd
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kayaba Industry Co Ltd, Kobe Steel Ltd filed Critical Kayaba Industry Co Ltd
Priority to JP5548885A priority Critical patent/JPS61215872A/en
Publication of JPS61215872A publication Critical patent/JPS61215872A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fluid-Driven Valves (AREA)

Abstract

PURPOSE:To obtain an actuator for a valve, which can easily control an opening and closing speed of the valve in accordance with an opening of the valve, by additionally providing a simplified further small sized valve opening and closing speed control mechanism. CONSTITUTION:The pressure of gas, feeding working fluid in a converter 11 into a piston side cylinder chamber 25 of an actuator 21 by a pipe line 6 via a flow control valve 13, selector valve 5, first passage in the first speed selector valve 41 and the first flow control valve 43 parallelly provided to said first passage, moves leftward a piston 23 and a piston rod 24. Thus an arm turns to open a valve in accordance with a stroke of the piston rod. If a passage of the working fluid uses the second flow control valve 44 and the second passage in the second speed selector valve, the valve, changing its opening and closing speed, operates at a high speed. The valve, detecting its opening by a valve opening detector 27 to be input to a solenoid operated valve 31, switches the first and the second passages.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明はバルブ用アクチュエータに関し、詳しくは、バ
ルブの開閉速度をバルブの開度に応じて変化させ得るよ
うにしたバルブ用アクチュエータ、例えば、バルブの開
閉作動において、水撃現象の起こりやすいバルブの閉止
直前には速度を小さく、その他の間においては、速度を
大きくし得るバルブ用アクチュエータに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a valve actuator, and more particularly to a valve actuator that can change the opening/closing speed of a valve depending on the opening degree of the valve, such as a valve actuator. The present invention relates to an actuator for a valve that can reduce the speed immediately before closing the valve, where water hammer phenomenon is likely to occur, and increase the speed during the rest of the opening/closing operation of the valve.

（従来の技術） 第１図は、バルブ用アク゛チュエータの一例として、従
来、パイプライン用ボールバルブを開閉するためのアク
チュエータとして用いられているガス油圧式アクチュエ
ータの構成を示し、このアクチュエータにおいては、パ
イプライン１に設けたボールバルブ本体２のバルブステ
ム３は、アクチュエータ本体２１が有するスコッチョー
ク機構のアーム２２により一定の速度で９０″回転され
て、バルブが開閉される。(Prior Art) As an example of a valve actuator, FIG. 1 shows the configuration of a gas-hydraulic actuator conventionally used as an actuator for opening and closing a pipeline ball valve. The valve stem 3 of the ball valve body 2 provided in the pipeline 1 is rotated 90'' at a constant speed by the arm 22 of the Scotch choke mechanism included in the actuator body 21 to open and close the valve.

図示したアーム２２の位置はボールバルブの閉止状態を
示し、この閉止状態からボールバルブを開くには、先ず
、主切換弁４を切換えて、作動ガス圧をガス−油圧変換
器１１に伝達する。このガス圧によって、変換器１１内
の作動油は、流量制御弁１３、切換弁５、流量制御弁１
５及び低速用電磁弁１７を経て、アクチュエータ２１の
ピストン側、即ち、入油側のシリンダ室２５に送入され
、ピストン２３及びピストンロッドｚ４を図面上人　′
方に移動させる。他方、アクチュエータの排油側、即ち
、ロッド側の作動油は、シリンダ室２６から吐出され、
再び低速用電磁弁１７、流量制御弁１６、切換弁５及び
流量制御弁１４を経て、変換器１２に戻る。このように
して、ピストンロッドのストロークに応じて、上記アー
ムが回動されて、バルブが開（。The illustrated position of the arm 22 indicates the closed state of the ball valve, and in order to open the ball valve from this closed state, the main switching valve 4 is first switched to transmit the working gas pressure to the gas-hydraulic converter 11. This gas pressure causes the hydraulic oil in the converter 11 to flow through the flow control valve 13, the switching valve 5, and the flow control valve 1.
5 and the low-speed solenoid valve 17, it is fed into the cylinder chamber 25 on the piston side of the actuator 21, that is, the oil input side, and the piston 23 and piston rod z4 are
move it towards the On the other hand, the hydraulic oil on the drain side of the actuator, that is, on the rod side, is discharged from the cylinder chamber 26,
It returns to the converter 12 via the low-speed solenoid valve 17, flow control valve 16, switching valve 5, and flow control valve 14 again. In this way, the arm is rotated according to the stroke of the piston rod, and the valve is opened.

以上のような従来のバルブ用アクチュエータにおいては
、前記したように、パイプラインの輸送流体が液体であ
る場合は、バルブの開閉時、特に、バルブを閉める直前
に所謂水撃現象が起こり、パイプ内の流体圧が異常に高
くなって、パイプラインの諸機器、殊にバルブ機構を破
損するおそれがある。このため、従来、バルブ用アクチ
ュエータにおいては、バルブを開閉作動するアクチュエ
ータの全ストロークを一定の小さい速度に制限しており
、このために大型のバルブの場合、その開閉に極めて長
時間を要する問題がある。In conventional valve actuators such as those described above, when the transport fluid in the pipeline is liquid, a so-called water hammer phenomenon occurs when the valve is opened and closed, especially immediately before closing the valve, causing damage inside the pipe. There is a risk that the fluid pressure in the pipeline will become abnormally high and damage the pipeline equipment, especially the valve mechanism. For this reason, in conventional valve actuators, the total stroke of the actuator that opens and closes the valve is limited to a certain small speed, which causes the problem that large valves require an extremely long time to open and close. be.

従って、従来、バルブの開度に応じてバルブの作動速度
を制御し、特に、バルブの閉止直前には速度を小さく、
その他の間においては、速度を大きくする必要があると
きは、第１図に示したように、前記低速用電磁弁１７に
並列に高速用電磁弁１８を配設し、バルブの閉止端近傍
でこの高速用電磁弁を同時に作動させて、作動油の流路
を拡大し、多量の作動油の移動を可能としている。Therefore, conventionally, the operating speed of the valve is controlled according to the opening degree of the valve, and in particular, the speed is reduced immediately before the valve closes.
In other cases, when it is necessary to increase the speed, a high-speed solenoid valve 18 is arranged in parallel with the low-speed solenoid valve 17, as shown in FIG. These high-speed solenoid valves are operated simultaneously to expand the flow path of hydraulic oil, making it possible to move a large amount of hydraulic oil.

しかし、このようなアクチュエータによれば、電磁弁を
並列して配設するので、アクチュエータの容積が大きい
と共に、製造費用が高く、更に、バルブに防爆装置を付
設するとき、装置容積が大きいために、防爆電磁弁とす
るには非常に高い費用を必要とする。However, with such an actuator, the solenoid valves are arranged in parallel, so the volume of the actuator is large and the manufacturing cost is high.Furthermore, when an explosion-proof device is attached to the valve, it is difficult to install an explosion-proof device due to the large volume of the device. , explosion-proof solenoid valves require very high costs.

（発明の目的） 本発明は、従来のバルブ用アクチュエータにおける上記
した問題を解決するためになされたものであって、簡単
且つ小型のバルブ開閉速度調整機構を付設することによ
って、バルブの開度に応じて容易にバルブの開閉速度を
制御することができるバルブ用アクチュエータを提供す
ることを目的とする。(Object of the Invention) The present invention was made to solve the above-mentioned problems in conventional valve actuators, and by adding a simple and compact valve opening/closing speed adjustment mechanism, the opening degree of the valve can be adjusted. It is an object of the present invention to provide a valve actuator that can easily control the opening/closing speed of a valve accordingly.

（発明の構成） 本発明によるバルブ用アクチュエータは、バルブの開放
及び閉止のためにガス−油圧変換器において作動ガス圧
を作動油に伝達して、アクチュエータの入油側のシリン
ダ室に送入し、排油側のシリンダ室から作動油をガス−
油圧変換器に戻すことにより、バルブステムを駆動して
、バルブを開閉するバルブ用アクチュエータにおいて、
上記変換器とシリンダ室とを接続する各作動油管路に第
１の通路と第２の通路とを有し、且つ、電磁弁に接続し
た速度切換弁を配設し、この速度切換弁のそれぞれに並
列に流量制御弁を配設し、作動油を上記変換器から上記
速度切換弁の第１の通路及び上記流量制御弁を経てアク
チュエータの入油側シリンダ室に送入し、排油側のシリ
ンダ室の作動油を上記流量制御弁を経て上記変換器に戻
すことにより、低速にてバルブを開閉すると共に、バル
ブ開度に応じて前記電磁弁を励磁し、この電磁弁に接続
した前記速度切換弁において、第１の通路を第２の通路
に切換えて、この第２の通路を前記流量制御弁と共に、
作動油の通路として、高速にてバルブを開閉することを
特徴とする特 以下、実施例を示す図面に基づいて本発明によるバルブ
用アクチュエータを説明する。(Structure of the Invention) The valve actuator according to the present invention transmits working gas pressure to the working oil in a gas-hydraulic converter to open and close the valve, and sends the working gas pressure to the cylinder chamber on the oil input side of the actuator. , the hydraulic oil is drained from the cylinder chamber on the oil drain side.
In a valve actuator that drives a valve stem to open and close a valve by returning it to a hydraulic converter,
Each hydraulic oil pipe connecting the converter and the cylinder chamber has a first passage and a second passage, and is provided with a speed switching valve connected to a solenoid valve, and each of the speed switching valves has a first passage and a second passage. A flow control valve is arranged in parallel to the converter, and hydraulic oil is sent from the converter to the oil input side cylinder chamber of the actuator via the first passage of the speed switching valve and the flow rate control valve, and the hydraulic oil is sent to the oil input side cylinder chamber of the actuator. By returning the hydraulic oil in the cylinder chamber to the converter via the flow rate control valve, the valve is opened and closed at low speed, and the solenoid valve is energized according to the valve opening degree, and the speed control valve connected to the solenoid valve is In the switching valve, the first passage is switched to a second passage, and the second passage is operated together with the flow rate control valve;
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a valve actuator according to the present invention will be described based on drawings showing embodiments, which are characterized by opening and closing a valve at high speed as a passage for hydraulic oil.

第２図は、本発明によるバルブ用アクチュエータの一実
施例を示し、第３図は速度切換弁の一実施例の断面を示
すが、筒車のために、第１図と同じ参照番号は第１図と
同じ要素又は構成を示し、同様に作動する。FIG. 2 shows an embodiment of an actuator for a valve according to the invention, and FIG. 3 shows a cross section of an embodiment of a speed switching valve, in which, for the hour wheel, the same reference numerals as in FIG. 1 are used. Figure 1 shows the same elements or configurations as in Figure 1 and operates in the same manner.

本発明によるバルブ用アクチュエータにおいては、第１
のガス−油圧変換器１１は、作動油管路６によって、切
換弁５及び第１の速度切換弁４１を経て、アクチュエー
タ２１のピストン側シリンダ室２５に接続されており、
上記第１の速度切換弁には第１の流量制御弁４３が並列
に配設されている。同様に、第２のガス−油圧変換器１
２は、作動油管路７によって、切換弁５及び第２の速度
切換弁４２を経て、アクチュエータ２１のロッド側シリ
ンダ室２６に接続されており、上記第２の速度切換弁に
は第２の流量制御弁４４が並列に配設されている。In the valve actuator according to the present invention, the first
The gas-hydraulic converter 11 is connected to the piston-side cylinder chamber 25 of the actuator 21 via the switching valve 5 and the first speed switching valve 41 via the hydraulic oil pipe 6,
A first flow rate control valve 43 is arranged in parallel with the first speed switching valve. Similarly, the second gas-hydraulic converter 1
2 is connected to the rod-side cylinder chamber 26 of the actuator 21 via the switching valve 5 and the second speed switching valve 42 via the hydraulic oil pipe 7, and the second speed switching valve has a second flow rate. Control valves 44 are arranged in parallel.

上記した第１及び第２の速度切換弁４１及び４２は、そ
れぞれがバルブの低速開閉のための第１の通路と、バル
ブの高速開閉のための第２の通路とを有する。これらの
第１の通路及び第２の通路は、第２図においては、それ
ぞれ（Ｉ）位置及び（ＩＩ）位置として図示されている
。The first and second speed switching valves 41 and 42 described above each have a first passage for low-speed opening/closing of the valve and a second passage for high-speed opening/closing of the valve. These first and second passages are illustrated in FIG. 2 as positions (I) and (II), respectively.

更に、本発明においては、前記作動油管路６及び７は、
それぞれチェック弁３４及び３５を有する側路８及び９
にて電磁弁３１に接続されていると共に、バルブ開度を
検出するために、バルブ開度検出器２７が、例えば、前
記バルブステム３に付設され、前記したように、バルブ
の開作動時や閉作動時において、高速作動を行なうとき
、上記電磁弁３１を入力して、この電磁弁を励磁させる
。Furthermore, in the present invention, the hydraulic oil pipes 6 and 7 are
Sideways 8 and 9 with check valves 34 and 35 respectively
A valve opening detector 27 is attached to the valve stem 3, for example, to detect the valve opening, and is connected to the solenoid valve 31 at the valve stem 3. During the closing operation, when performing high-speed operation, input is applied to the solenoid valve 31 to energize the solenoid valve.

図示した電磁弁は消磁状態を示し、この消磁状態では上
記作動油側路８及び９はブロックされており、速度切換
弁４１及び４２は共に（１）位置にあって、第１の通路
が作動油通路を形成している。The illustrated solenoid valve shows a demagnetized state, in which the hydraulic oil side passages 8 and 9 are blocked, the speed selector valves 41 and 42 are both in the (1) position, and the first passage is activated. It forms an oil passage.

他方、電磁弁が励磁されたときは、作動油は管路１０を
経て、パイロット圧として前記第１及び第２の速度切換
弁４１及び４２に入力され、これら”速度切換弁の作動
油通路は、第１の通路から第２の通路に切り換えられる
。即ち、速度切換弁は（ＩＩ）位置に切換えられる。On the other hand, when the solenoid valve is energized, hydraulic oil is input as pilot pressure to the first and second speed switching valves 41 and 42 through the pipe 10, and the hydraulic oil passages of these speed switching valves are , the first passage is switched to the second passage, ie the speed switching valve is switched to position (II).

次に、本発明によるアクチュエータの作動を説明する。Next, the operation of the actuator according to the present invention will be explained.

図示した状態はバルブの閉止状態を示し、バルブを開け
るには、先ず、主切換弁４を切換えて、作動ガス圧を第
１のガス−油圧変換器１１に伝達する。このガス圧によ
って、この変換器１１内の作動油は、管路６によって、
流量制御弁１３、切換弁５、第１の速度切換弁４１にお
ける第１の通路とこれに並列された第１の流量制御弁４
３を経て、アクチュエータ２１のピストン側シリンダ室
２５に送入され、ピストン２３及びピストンロッド２４
を図面上左方に移動させ、他方、アクチュエータのロッ
ド側、即ち、排油側の作動油は、シリンダ室２６から吐
出され、第２の流量制御弁４４、切換弁５及び流量制御
弁１４を経て、第２の変換器１２に戻され、かくして、
ピストンロッドのストロークに応じて上記アームが回動
し、バルブを開く、バルブを開状態から閉状態とするに
は、上記と逆に、第２の変換器１２に作動ガス圧を作用
させればよい。The illustrated state shows the closed state of the valve, and in order to open the valve, the main switching valve 4 is first switched to transmit the working gas pressure to the first gas-hydraulic converter 11. Due to this gas pressure, the hydraulic oil in this converter 11 is
The flow control valve 13, the switching valve 5, the first passage in the first speed switching valve 41, and the first flow control valve 4 parallel to the first passage
3, it is sent to the piston side cylinder chamber 25 of the actuator 21, and the piston 23 and piston rod 24
On the other hand, the hydraulic oil on the rod side of the actuator, that is, on the drain side, is discharged from the cylinder chamber 26, and the second flow control valve 44, the switching valve 5, and the flow control valve 14 are moved to the left in the drawing. and then returned to the second converter 12, thus
In order to open the valve by rotating the arm in accordance with the stroke of the piston rod, or to change the valve from the open state to the closed state, the working gas pressure is applied to the second converter 12 in the opposite manner to the above. good.

このように、バルブの開閉時、第１及び第２の速度切換
弁の作動油通路が第１の通路に保持されているときは、
バルブは低速開閉される。In this way, when the hydraulic oil passages of the first and second speed switching valves are held in the first passage when the valve is opened and closed,
The valve is opened and closed at low speed.

次に、本発明のアクチュエータによるバルブの開閉速度
の切換について、バルブを閉じる場合を例として説明す
る。Next, switching of the opening/closing speed of a valve by the actuator of the present invention will be described using an example in which the valve is closed.

バルブの閉作動において、バルブ開度が予め定められた
所定値に達するまでの間は、バルブ開度検出器２７によ
って前記電磁弁３１が励磁されているので、前記作動油
側路８及び９は、この電磁弁によって管路１０に接続さ
れ、作動油圧をパイロット圧として第１及び第２の速度
切換弁４１及び４２に入力している。その結果、各速度
切換弁における通路は共に（ＩＦ）位置にある。即ち、
各速度切換弁は第２の通路を作動油通路としている。During the valve closing operation, until the valve opening reaches a predetermined value, the solenoid valve 31 is energized by the valve opening detector 27, so the hydraulic oil side paths 8 and 9 are , is connected to the conduit 10 by this electromagnetic valve, and inputs the hydraulic pressure as a pilot pressure to the first and second speed switching valves 41 and 42. As a result, the passages in each speed switching valve are both in the (IF) position. That is,
Each speed switching valve uses a second passage as a hydraulic oil passage.

従って、第２のガス−油圧変換器１２からの作動油は、
第２の流量制御弁４４と共に、第２の速度切換弁におけ
る第２の通路を作動油通路として、入油側のシリンダ室
２６に送入され、他方、排油側のシリンダ室２５の作動
油は、第１の流量制御弁４３のみならず、第１の速度切
換弁４１の第２の通路をも作動油通路として移動し、か
くして、バルブは高速にて閉じられる。Therefore, the hydraulic fluid from the second gas-hydraulic converter 12 is
Together with the second flow rate control valve 44, the second passage in the second speed switching valve is used as a hydraulic oil passage, and the hydraulic oil is supplied to the cylinder chamber 26 on the oil input side, while the hydraulic oil is in the cylinder chamber 25 on the oil discharge side. moves not only through the first flow rate control valve 43 but also through the second passage of the first speed switching valve 41 as a hydraulic oil passage, and thus the valve is closed at high speed.

次いで、バルブ開度が閉止端近傍で予め設定された所定
値に達したとき、これを前記バルブ開度検出器２７にて
検出し、これを電磁弁３１に入力して、電磁弁を消磁す
れば、第１及び第２の速度切換弁４１及び４２において
、作動油の通路は、それぞれ第２の通路から第１の通路
に切換えられるので、バルブは低速で閉じられることと
なる。Next, when the valve opening reaches a predetermined value near the closed end, this is detected by the valve opening detector 27, and this is input to the solenoid valve 31 to demagnetize the solenoid valve. For example, in the first and second speed switching valves 41 and 42, the hydraulic oil passages are switched from the second passage to the first passage, respectively, so the valves are closed at a low speed.

尚、電磁弁は、上記したように、バルブ開度検出器から
の信号にて自動的に作動させてもよいが、必要に応じて
、手動にて作動させてもよいのは勿論である。また、上
記においては、バルブ閉止作動時にバルブ開度が閉止端
近傍に達したときに、これをバルブ開度検出器にて検出
し、電磁弁を作動させているが、バルブ開度の検出及び
電磁弁の作動は、目的、用途に応じて、バルブ開度の任
意位置で行なうことができるのはいうまでもない。As described above, the solenoid valve may be automatically operated by a signal from the valve opening detector, but it is of course possible to operate the electromagnetic valve manually if necessary. In addition, in the above, when the valve opening reaches the vicinity of the closing end during the valve closing operation, the valve opening detector detects this and operates the solenoid valve. It goes without saying that the solenoid valve can be operated at any position of the valve opening depending on the purpose and use.

（発明の効果） 以上のように、バルブの開閉速度を可変とするために、
２基の電磁弁を備えた従来のアクチュエータと異なり、
本発明によれば、作動油管路に第１及び第２の速度切換
弁を配設し、この速度切換弁にそれぞれ第１及び第２の
作動油通路を設けると共に、上記速度切換弁を電磁弁に
接続して、バルブ開度に応じて、電磁弁を作動させるこ
とにより、上記速度切換弁の作動油通路を切換えること
によって、作動油管路を縮小し、又は拡大するものであ
る。(Effect of the invention) As described above, in order to make the opening/closing speed of the valve variable,
Unlike conventional actuators equipped with two solenoid valves,
According to the present invention, first and second speed switching valves are disposed in the hydraulic fluid pipe, first and second hydraulic fluid passages are provided in the speed switching valves, respectively, and the speed switching valve is connected to a solenoid valve. The hydraulic oil conduit is contracted or expanded by connecting to the valve and operating a solenoid valve according to the valve opening to switch the hydraulic oil passage of the speed switching valve.

従って、本発明のアクチュエータによれば、電磁弁は小
型のパイロット用電磁弁１基を配設すれば足りるので、
装置が簡単化且つ小型化され、保守が容易であると共に
、防爆電磁弁に構成する場合も、電磁弁が小型であるの
で、製造費用を著しく低減することができる。Therefore, according to the actuator of the present invention, it is sufficient to install one small pilot solenoid valve as the solenoid valve.
The device is simplified and miniaturized, and maintenance is easy, and even when configured as an explosion-proof solenoid valve, the manufacturing cost can be significantly reduced because the solenoid valve is small.

尚、以上は、ガス油圧式ボールバルブ用アクチュエータ
について説明したが、ガス油圧式ゲートバルブの場合に
は、バルブに接続したバルブステムをアクチュエータに
より上下に駆動してバルブを開閉するので、ボールバル
ブの場合と全く同様にして、バルブ開度に対応してバル
ブの開閉速度を制御し得ることができ、従って、本発明
はボールバルブに限らず、ゲートバルブの場合にも等し
く適用し得るものである。The above explanation has been about actuators for gas-hydraulic ball valves, but in the case of gas-hydraulic gate valves, the valve stem connected to the valve is driven up and down by the actuator to open and close the valve. The opening/closing speed of the valve can be controlled in accordance with the valve opening degree in exactly the same way as in the case of the invention. Therefore, the present invention is equally applicable not only to ball valves but also to gate valves. .

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

第１図は従来のガス油圧式バルブ用アクチュエータの一
例を示す構成図、第２図は本発明によるガス油圧式バル
ブ用アクチュエータの実施例を示す要部構成図、第３図
は速度切換弁の一実施例を示す断面図である。 １・・・パイプライン、２・・・バルブ本体、３・・・
バルブステム、５・・・切換弁、６．７・・・作動油管
路、８．９・・・作動油側路、１１．１２・・・ガス−
油圧変換器、２１・・・アクチュエータ本体、２２・・
・アーム、２７・・・バルブ開度検出装置、３１・・・
電磁弁、４１・・・第１の速度切換弁、４２・・・第２
の速度切換弁、４３・・・第１の流量制御弁、４４・・
・第２の流量制御弁、■・・・第１の通路、■・・・第
１の通路。Fig. 1 is a block diagram showing an example of a conventional gas-hydraulic valve actuator, Fig. 2 is a main part block diagram showing an embodiment of the gas-hydraulic valve actuator according to the present invention, and Fig. 3 is a block diagram of a speed switching valve. FIG. 3 is a cross-sectional view showing one embodiment. 1...Pipeline, 2...Valve body, 3...
Valve stem, 5...Switching valve, 6.7...Hydraulic oil pipe, 8.9...Hydraulic oil side path, 11.12...Gas-
Hydraulic converter, 21...actuator body, 22...
・Arm, 27... Valve opening detection device, 31...
Solenoid valve, 41...first speed switching valve, 42...second
speed switching valve, 43...first flow rate control valve, 44...
- Second flow control valve, ■...first passage, ■...first passage.

Claims (2)

【特許請求の範囲】[Claims] （１）バルブの開放及び閉止のためにガス−油圧変換器
において作動ガス圧を作動油に伝達して、アクチュエー
タの入油側のシリンダ室に送入し、排油側のシリンダ室
から作動油をガス−油圧変換器に戻すことにより、バル
ブステムを駆動して、バルブを開閉するバルブ用アクチ
ュエータにおいて、上記変換器とシリンダ室とを接続す
る各作動油管路に第１の通路と第２の通路とを有し、且
つ、電磁弁に接続した速度切換弁を配設し、この速度切
換弁のそれぞれに並列に流量制御弁を配設し、作動油を
上記変換器から上記速度切換弁の第１の通路及び上記流
量制御弁を経てアクチュエータの入油側シリンダ室に送
入し、排油側のシリンダ室の作動油を上記流量制御弁を
経て上記変換器に戻すことにより、低速にてバルブを開
閉すると共に、バルブ開度に応じて前記電磁弁を励磁し
、この電磁弁に接続した前記速度切換弁において、第１
の通路を第２の通路に切換えて、この第２の通路を前記
流量制御弁と共に、作動油の通路として、高速にてバル
ブを開閉することを特徴とするバルブ用アクチュエータ
。(1) In order to open and close the valve, the working gas pressure is transmitted to the hydraulic oil in the gas-hydraulic converter, and the hydraulic oil is sent to the cylinder chamber on the oil input side of the actuator, and from the cylinder chamber on the oil discharge side. In the valve actuator, which opens and closes the valve by driving the valve stem by returning the gas-hydraulic converter to the gas-hydraulic converter, each hydraulic oil pipe connecting the converter and the cylinder chamber has a first passage and a second passage. A speed switching valve having a passageway and connected to the solenoid valve is disposed, and a flow control valve is disposed in parallel with each of the speed switching valves, and hydraulic oil is transferred from the converter to the speed switching valve. The hydraulic oil is supplied to the cylinder chamber on the oil input side of the actuator through the first passage and the flow control valve, and the hydraulic oil in the cylinder chamber on the oil discharge side is returned to the converter through the flow control valve. In the speed switching valve connected to the solenoid valve, which opens and closes the valve and excites the solenoid valve according to the valve opening degree, the first
A valve actuator characterized in that the passage is switched to a second passage, and the second passage is used together with the flow rate control valve as a passage for hydraulic oil to open and close the valve at high speed. （２）バルブの開度を検出する検出装置を設け、所定の
バルブ開度において、電磁弁を励磁又は消磁させること
を特徴とする特許請求の範囲第１項記載のバルブ用アク
チュエータ。(2) The valve actuator according to claim 1, further comprising a detection device for detecting the opening degree of the valve, and energizes or demagnetizes the electromagnetic valve at a predetermined valve opening degree.
JP5548885A 1985-03-18 1985-03-18 Actuator for valve Pending JPS61215872A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5548885A JPS61215872A (en) 1985-03-18 1985-03-18 Actuator for valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5548885A JPS61215872A (en) 1985-03-18 1985-03-18 Actuator for valve

Publications (1)

Publication Number Publication Date
JPS61215872A true JPS61215872A (en) 1986-09-25

Family

ID=13000012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5548885A Pending JPS61215872A (en) 1985-03-18 1985-03-18 Actuator for valve

Country Status (1)

Country Link
JP (1) JPS61215872A (en)

Similar Documents

Publication Publication Date Title
JPH04262072A (en) Hydraulic motor control device
US3595264A (en) Load control and holding valve
US4860646A (en) Compactor with hydraulic dwell and method
JPS63225701A (en) Hydraulic pressure controller
KR101641270B1 (en) Travel control system for construction machinery
JP2006234144A (en) Flow control valve with pressure compensation valve
JP3329397B2 (en) Valve block for hydraulic cylinder
JPH0372872B2 (en)
JPS61215872A (en) Actuator for valve
CA1201142A (en) Log grapple device
US4213298A (en) Self-reversing hydraulic control system and self-reversing pump incorporating such system
US2696196A (en) Control valve for hydraulic apparatus
US5081902A (en) Apparatus for providing relief to a working chamber
US3776101A (en) Control device for controlling a pneumatic piston
US5918526A (en) Method in a pneumatic oscillating device to observe an obstacle and to continue oscillating and corresponding oscillating device
US4223531A (en) Gas pressure to hydraulic pressure converter system in an oil pressure actuator
CN106678112B (en) A kind of underwater cylinder control system
GB2106188A (en) Hydraulic cylinder control
CN219082391U (en) Valve execution system with main line closed and auxiliary line forced to be opened
US6622611B2 (en) Hydraulic device
KR970029950A (en) Gas circuit breaker and fluid pressure drive device used therein
JPH0459484B2 (en)
JPH0245521Y2 (en)
JPH04203604A (en) Valve block for hydraulic cylinder
JP2651885B2 (en) Flow control directional control valve