JPH09100802A - Valve driving device - Google Patents

Valve driving device

Info

Publication number
JPH09100802A
JPH09100802A JP7278411A JP27841195A JPH09100802A JP H09100802 A JPH09100802 A JP H09100802A JP 7278411 A JP7278411 A JP 7278411A JP 27841195 A JP27841195 A JP 27841195A JP H09100802 A JPH09100802 A JP H09100802A
Authority
JP
Japan
Prior art keywords
air
piston
booster
oil
cylinder
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.)
Granted
Application number
JP7278411A
Other languages
Japanese (ja)
Other versions
JP2913381B2 (en
Inventor
Sadayuki Nakanishi
定之 中西
Koji Sato
好治 佐藤
Akio Fukunaga
昭男 福永
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.)
Kitz Corp
Original Assignee
Kitz Corp
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 Kitz Corp filed Critical Kitz Corp
Priority to JP7278411A priority Critical patent/JP2913381B2/en
Publication of JPH09100802A publication Critical patent/JPH09100802A/en
Application granted granted Critical
Publication of JP2913381B2 publication Critical patent/JP2913381B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Landscapes

  • Taps Or Cocks (AREA)
  • Fluid-Driven Valves (AREA)
  • Actuator (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a compact and lightweight valve driving device, for which no restriction on an installation place and no installation of a carriage is required, by using compressed air or instrument air at a comparatively low pressure as power. SOLUTION: In a valve driving device, in which a hydraulic type operation machine 2 is actuated when hydraulic oil whose pressure is increased by feeding instrument air and the like into a booster 1 is fed out, a large diameter piston 18 is inserted into a cylinder 17 in the booster 1, a small diameter cylindrical column part, 19 concentrically arranged on one side of the piston 18 penetrates an end wall 22 sealingly so as to be protruded to the outside. When the hydraulic oil is filled in one side 20 of the cylinder 17 while instrument air and the like is fed into the other side 21, the hydraulic oil, whose pressure is increased in inverse proportion to the operation area ratio between the air and the oil working on the piston 18, is fed out, while an air-oil booster 5 is connected to the one side 20, and the booster 1 is restored when the hydraulic oil, whose pressure is increased by feeding the instrument air and the like to the air-oil booster 5, is fed to the one side 20.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、主として工場内や
屋外プラントの圧搾空気又は計装空気を動力として、ボ
ールバルブなどのバルブを開閉する弁駆動装置に関する
ものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve drive device for opening and closing a valve such as a ball valve, mainly using compressed air or instrumentation air in a factory or an outdoor plant as power.

【0002】[0002]

【従来の技術】工場内や屋外プラントのバルブに用いら
れる弁駆動装置は、従来は一般に、圧搾空気や計装空気
を直接動力として使用する場合が多く、これら圧搾空気
や計装空気の利用できる圧力は4〜7Kgf/cm2であっ
て、比較的低い圧力であるために、特にバルブの口径が
大きい場合には、使用する操作機が極めて大きく重くな
り、このためバルブの設置場所に制限を設けたり、架台
を設ける必要が生じたりして、操作機そのものが高価に
なるだけでなく他に多くの費用を必要とし、また、消費
空気量が多く開閉時間が長いなどの課題を有していた。
2. Description of the Related Art A valve drive device used for a valve in a plant or an outdoor plant generally uses compressed air or instrument air as a direct power in many cases, and the compressed air or instrument air can be used. Since the pressure is 4 to 7 Kgf / cm 2 and it is a relatively low pressure, the operating machine to be used becomes extremely large and heavy, especially when the valve diameter is large. It requires installation or installation of a pedestal, which not only makes the operating device expensive, but also requires a lot of other costs, and it has problems such as large air consumption and long opening and closing times. It was

【0003】[0003]

【発明が解決しようとする課題】本発明は、上記のよう
に工場内や屋外プラントの圧搾空気や計装空気を動力と
してバルブを開閉する従来の弁駆動装置が、操作機が大
きく重くて設置場所に制限を受けたり、架台を設ける必
要が生じたり、操作機そのものが高価になるだけでなく
他に多くの費用を必要とし、消費空気量が多く開閉時間
が長いという課題を解決するためのものである。
SUMMARY OF THE INVENTION According to the present invention, a conventional valve drive device for opening and closing a valve by using compressed air or instrumentation air in a factory or an outdoor plant as a power source is installed because the operating machine is large and heavy. In order to solve the problems that the space is restricted, it is necessary to install a gantry, the operating machine itself is expensive, and also many expenses are required, the air consumption is large and the opening and closing time is long. It is a thing.

【0004】[0004]

【課題を解決するための手段】上記の課題を解決するた
めに、本発明は、ブースタに圧搾空気又は計装空気を送
入して圧力を上昇させた作動油を送出させて、バルブに
装着した油圧式操作機を作動させてバルブを開閉するよ
うにした弁駆動装置であって、このブースタは、シリン
ダに大径のピストンを装入し、このピストンの一方の側
に同軸に設けた小径の円柱部をシリンダの一方の端壁を
貫通して外方へ密封状に突出し、このシリンダのピスト
ンの一方の側に作動油を満たし、このシリンダのピスト
ンの他方の側に圧搾空気又は計装空気を装入するとピス
トンが一方に移動して、その空気圧に対してピストンに
作用する空気と油との作用面積の比に反比例して圧力が
上昇した作動油を送出し、シリンダのピストンの一方の
側に接続した空油増圧器に圧搾空気又は計装空気を装入
すると、この空油増圧器から圧力を上昇させた作動油を
シリンダのピストンの一方の側に送入してピストンを他
方へ移動させるように構成した。
In order to solve the above-mentioned problems, the present invention is to install compressed air or instrumentation air into a booster to send out hydraulic oil whose pressure has been raised, and to mount it on a valve. This booster is a valve drive device that opens and closes a valve by operating a hydraulic actuator.This booster has a large-diameter piston inserted in a cylinder, and a small-diameter coaxially installed on one side of this piston. The cylindrical part of the cylinder penetrates through one end wall of the cylinder and projects outward in a sealed manner, one side of the piston of this cylinder is filled with hydraulic oil, and the other side of the piston of this cylinder is compressed air or instrumentation. When air is charged, the piston moves to one side, and the hydraulic oil whose pressure rises in inverse proportion to the ratio of the acting area of air and oil acting on the piston with respect to the air pressure is sent out, and one of the cylinder piston Empty oil connected to the side of When charged with compressed air or instrument air to the intensifier, to constitute a piston forced in the hydraulic fluid increasing the pressure from the air oil intensifier to one side of the cylinder of the piston to move to the other.

【0005】この場合、上記の円柱部が貫通する端壁に
設けられた複数のシール部の間から油タンクに接続する
ドレン管を設けるとよい。
In this case, it is advisable to provide a drain pipe which is connected to the oil tank through a plurality of seal portions provided on the end wall through which the columnar portion penetrates.

【0006】[0006]

【作用】本発明の弁駆動装置を上記のように構成したの
で、この弁駆動装置のブースタのシリンダのピストンの
他方の側に圧搾空気又は計装空気を送入すると、ピスト
ンが一方に押され、シリンダのピストンの一方の側に満
たされた作動油が送出され、この作動油によってバルブ
に装着した油圧式操作機を作動させてバルブを開閉させ
る。
Since the valve drive device of the present invention is constructed as described above, when compressed air or instrumentation air is sent to the other side of the piston of the cylinder of the booster of the valve drive device, the piston is pushed to one side. The hydraulic oil filled in one side of the piston of the cylinder is sent out, and the hydraulic oil operates a hydraulic operating device mounted on the valve to open and close the valve.

【0007】この場合、シリンダのピストンの他方の側
に送入された圧搾空気又は計装空気が大径のピストンの
全断面面積に圧力を加えるのに対し、シリンダのピスト
ンの一方の側に満たされた作動油がピストンに対して圧
力を加える面積は、大径のピストンの全断面面積から小
径の円柱部の断面面積を差し引いた面積であり、従っ
て、作動油の圧力は、圧搾空気又は計装空気の圧力に対
して上記のピストンに作用する空気と油との作用面積の
比に反比例して上昇した圧力になる。
In this case, compressed air or instrumentation air fed to the other side of the piston of the cylinder exerts pressure on the entire cross-sectional area of the large-diameter piston, whereas it is filled on one side of the piston of the cylinder. The area in which the hydraulic oil applied exerts pressure on the piston is the area obtained by subtracting the cross-sectional area of the small-diameter cylindrical portion from the total cross-sectional area of the large-diameter piston. The pressure rises in inverse proportion to the ratio of the working area of the air and oil acting on the piston with respect to the pressure of the charged air.

【0008】このようにブースタによって昇圧した高い
圧力の作動油で操作機を作動させるので、バルブの口径
が大きい場合でも、使用する操作機は小さく軽く、この
ため設置場所に制限を受けたり、架台を設ける必要が生
じたりすることが少なく、操作機そのものが安価になる
だけでなく、他の費用も少なくてすむ。また、消費空気
量が少なくてすみ、開閉時間が短い。更に、ガス/油式
アキュムレータを使用する必要がないので、操作機の出
力が次第に低下して作動速度が遅くなることもない。
Since the operating device is operated by the high pressure hydraulic oil boosted by the booster as described above, the operating device to be used is small and light even if the valve has a large diameter, and therefore the installation place is restricted or the mount is not installed. It is unlikely that there will be a need to provide the operation machine, and not only the operating machine itself becomes inexpensive, but also other costs can be reduced. In addition, it consumes less air and has a shorter opening and closing time. Further, since it is not necessary to use a gas / oil type accumulator, the output of the operating device does not gradually decrease and the operating speed does not slow down.

【0009】次に、ブースタを復帰させるには、シリン
ダのピストンの一方の側へ、これに接続した空油増圧器
から圧力が上昇した作動油を送入してピストンを他方へ
移動させる。このためには、空油増圧器から送出される
作動油の圧力は、これがピストンの小さい作用面積に作
用しても、圧搾空気又は計装空気がピストンの大きい作
用面積に作用して生ずる力に打ち勝つのに十分に高くな
ければならない。
Next, in order to restore the booster, the working oil having the increased pressure is fed to one side of the piston of the cylinder from the air-oil pressure booster connected thereto, and the piston is moved to the other side. To this end, the pressure of the hydraulic oil delivered from the pneumatic oil intensifier increases the force exerted by the compressed air or instrumentation air acting on the large working area of the piston, even if it acts on the small working area of the piston. Must be high enough to overcome.

【0010】この場合、ブースタと油圧式操作機とを結
ぶ作動油配管の途中に設けた切替弁は、直前の操作時の
ままにしておいて、特に切替えの中立の状態にしなくて
も、何等支障はない。上記の空油増圧器は、圧搾空気又
は計装空気を送入して、油タンクから吸入した作動油を
圧力を上昇させて送出させ、ブースタに送入させる作用
を行うように構成され配管されている。
In this case, the switching valve provided in the middle of the hydraulic oil pipe connecting the booster and the hydraulic operating device does not need to be in the neutral state for switching without leaving the switching valve at the time of the last operation. There is no hindrance. The above-mentioned air-oil pressure booster is configured and arranged so as to feed compressed air or instrumentation air, raise the pressure of the working oil sucked from the oil tank and send it out, and feed it to the booster. ing.

【0011】以上に説明した本発明の弁駆動装置の作用
を、操作の順序に従って具体的に説明すると、まず、ブ
ースタをピストンが他方へ移動しており、シリンダのピ
ストンの他方の側に圧搾空気又は計装空気が送入されて
加圧している状態にしておく。次に、切替弁を操作して
ブースタからの作動油を油圧式操作機に送り、油圧式操
作機を作動させてバルブを開弁又は閉弁させる。
The operation of the valve drive device of the present invention described above will be specifically described in the order of operations. First, the piston moves to the other side of the booster, and the compressed air flows to the other side of the piston of the cylinder. Alternatively, keep the instrument air pressurized and supplied. Next, the switching valve is operated to send the hydraulic oil from the booster to the hydraulic operating device, and the hydraulic operating device is operated to open or close the valve.

【0012】バルブの開弁又は閉弁が完了したら空油増
圧器を作動させて、これから圧力が高い作動油をブース
タのシリンダのピストンの一方の側に送入させ、ピスト
ンを他方へ移動させてブースタを復帰させる。
When opening or closing of the valve is completed, the air-oil pressure booster is actuated, and hydraulic oil having a high pressure is sent to one side of the piston of the booster cylinder, and the piston is moved to the other side. Restore the booster.

【0013】切替弁を前とは反対に操作してブースタか
ら油圧式操作機に送られている作動油を切替え、油圧式
操作機を前とは反対に作動させて、バルブを閉弁又は開
弁させる。バルブの閉弁又は開弁が完了したら、再び空
油増圧器を作動させて、ブースタを復帰させる。
The switching valve is operated in the opposite direction to switch the hydraulic fluid sent from the booster to the hydraulic operating device, and the hydraulic operating device is operated in the opposite direction to close or open the valve. Let me speak. When the closing or opening of the valve is completed, the pneumatic oil booster is activated again to restore the booster.

【0014】なお、このブースタの円柱部が貫通するシ
リンダの端壁に設けられた複数のシール部の間からドレ
ン管を設けて油タンクに接続したので、シリンダからシ
ール部の一部を通って漏れ出る作動油がこのドレン管を
通って油タンクに流れ、シリンダからすなわちブースタ
から作動油が外部に漏れ出て附近を汚すことがない。ま
た、作動油が漏失によって消耗することがない。
Since a drain pipe is provided between the plurality of seal portions provided on the end wall of the cylinder through which the columnar portion of the booster penetrates to connect to the oil tank, a portion of the seal portion is passed from the cylinder. The hydraulic fluid that leaks flows through the drain pipe to the oil tank, and the hydraulic fluid does not leak to the outside from the cylinder, that is, from the booster, and does not contaminate the vicinity. Further, the hydraulic oil is not consumed due to leakage.

【0015】本発明の駆動装置では、ブースタの復帰に
空油増圧器によって昇圧した作動油を用いており、この
ためブースタの構造は簡単なものである。
In the drive system of the present invention, the hydraulic oil boosted by the air-oil pressure booster is used to restore the booster. Therefore, the structure of the booster is simple.

【0016】[0016]

【実施例】図1は、本発明の弁駆動装置の一実施例を示
す配管系統図であって、1はブースタ、2は油圧式操作
機、3はバルブ、4は切替弁、5は空油増圧器、6は油
タンク、7はドレン管、8及び9は速度調整弁、10は
遮断弁、11は圧搾空気又は計装空気の供給元、12は
コントロールボックス、13、14、15及び16はリ
ミットスイッチである。また、ブースタ1において、1
7はシリンダ、18はピストン、19は円柱部、20は
シリンダ17のピストン18の一方の側、21はシリン
ダ17のピストン18の他方の側、22はシリンダ17
の端壁、23及び24はシール部である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a piping system diagram showing an embodiment of a valve drive device of the present invention, in which 1 is a booster, 2 is a hydraulic operator, 3 is a valve, 4 is a switching valve, and 5 is an empty valve. Oil intensifier, 6 oil tank, 7 drain pipe, 8 and 9 speed control valve, 10 shutoff valve, 11 compressed air or instrument air supply source, 12 control box, 13, 14, 15 and Reference numeral 16 is a limit switch. Also, in booster 1, 1
7 is a cylinder, 18 is a piston, 19 is a cylindrical portion, 20 is one side of the piston 18 of the cylinder 17, 21 is the other side of the piston 18 of the cylinder 17, 22 is the cylinder 17
The end walls, 23 and 24 are seals.

【0017】ブースタ1のシリンダ17には、大径のピ
ストン18が装入されており、このピストン18の一方
(図の左方)の側に小径の円柱部19が同軸に設けられ
ていて、この円柱部19がシリンダ17の端壁22を貫
通して外方へ突出している。このシリンダ17のピスト
ン18の一方の側20には作動油が満たされており、こ
れから配管によって遮断弁10を径て切替弁4と結ばれ
ている。また、空油増圧器5とも結ばれている。更に、
切替弁4と油圧式操作機2との間が図のように速度調整
弁8及び9を介する配管によって結ばれている。
A large-diameter piston 18 is inserted in the cylinder 17 of the booster 1, and a small-diameter cylindrical portion 19 is coaxially provided on one side (left side in the drawing) of the piston 18. The column portion 19 penetrates the end wall 22 of the cylinder 17 and projects outward. One side 20 of the piston 18 of the cylinder 17 is filled with hydraulic oil, and is connected with the switching valve 4 by piping from which the shutoff valve 10 is arranged. It is also connected to the air-oil pressure booster 5. Furthermore,
The switching valve 4 and the hydraulic operating device 2 are connected by piping via speed adjusting valves 8 and 9 as shown in the figure.

【0018】シリンダ19のピストン18の他方の側2
1及び空油増圧器5は、圧搾空気又は計装空気の供給元
11と接続されている。また、油タンク6は、切替弁4
及び空油増圧器5と接続されている。
The other side 2 of the piston 18 of the cylinder 19
1 and the pneumatic oil booster 5 are connected to a supply source 11 of compressed air or instrumentation air. Further, the oil tank 6 is provided with the switching valve 4
And the air-oil pressure booster 5.

【0019】図1において、供給元11から送られる圧
搾空気又は計装空気がブースタ1のシリンダ17のピス
トン18の他方(図の右方)の側に送入されており、ピ
ストン18が一方(図の左方)へ押され、シリンダ17
のピストン18の一方の側20に満たされている作動油
が送り出される。
In FIG. 1, the compressed air or instrumentation air sent from the supply source 11 is sent to the other side (right side in the figure) of the piston 18 of the cylinder 17 of the booster 1, and the piston 18 is set to one ( Cylinder 17 is pushed to the left)
The hydraulic oil filled in one side 20 of the piston 18 of the above is discharged.

【0020】この場合の作動油の圧力Pと圧搾空気又は
計装空気の圧力Pとの関係は、
The relationship between the pressure P of the hydraulic oil and the pressure P of the compressed air or instrument air in this case is

【数1】 である。(Equation 1) It is.

【0021】今仮に、円柱部19の直径がピストン18
の直径の75%であって、圧搾空気又は計装空気の圧力
が5Kgf/cm2であるとすると、上式は、次のようにな
る。
Now, assuming that the diameter of the cylindrical portion 19 is the piston 18
And the pressure of compressed air or instrumentation air is 5 kgf / cm 2 , the above equation is as follows.

【数2】 従って、P≒11.43(Kgf/cm2)となり、Pは高い
圧力である。
(Equation 2) Therefore, P≈11.43 (Kgf / cm 2 ) and P is a high pressure.

【0022】このため、バルブ3を開閉するための油圧
式操作機2は小さく軽く、このため設置場所に制限を受
けたり、架台を設ける必要が生じたりすることが少な
く、操作機2そのものが安価になるだけでなく、他の費
用も少なくてすむ。また、消費空気量が少なくてすみ、
開閉時間が短い。更に、ガス/油圧アキュムレータを使
用する必要がないので、操作機の出力が次第に低下して
作動速度が遅くなることもない。
For this reason, the hydraulic operating device 2 for opening and closing the valve 3 is small and light, and therefore there are few restrictions on the installation place and the need to provide a pedestal, and the operating device 2 itself is inexpensive. Not only is it cheaper, but other costs are lower. Also, it consumes less air,
Opening and closing time is short. Further, since it is not necessary to use the gas / hydraulic accumulator, the output of the operating device does not gradually decrease and the operating speed does not slow down.

【0023】ブースタ1から送出された高圧の作動油
は、常時は開弁している遮断弁10を通って切替弁4に
至る。切替弁4がコントロールボックス12からの指令
によって作動すると、上記の高圧の作動油が速度調整弁
8又は9を通って油圧式操作機2を作動させ、バルブ3
を開弁又は閉弁させる。今仮に速度調整弁8の方へ流れ
たとすると、油圧式操作機2の図における一方のシリン
ダ2aに作動油が流入し、他方のシリンダ2bの中の作
動油は速度調整弁9を通って油タンク6に送り込まれ
る。
The high-pressure hydraulic fluid delivered from the booster 1 reaches the switching valve 4 through the shutoff valve 10 which is normally open. When the switching valve 4 operates according to a command from the control box 12, the high-pressure hydraulic oil described above operates the hydraulic operating device 2 through the speed adjusting valve 8 or 9, and the valve 3
Is opened or closed. If it now flows toward the speed adjusting valve 8, the hydraulic oil flows into one cylinder 2a of the hydraulic operating device 2 in the figure, and the hydraulic oil in the other cylinder 2b passes through the speed adjusting valve 9 to reach the oil. It is sent to the tank 6.

【0024】次に、ブースタ1を復帰させるために、切
替弁4を図に示した状態、すなわち遮断弁10を径た作
動油の流れが切替弁4によって止められる切替えの中立
の状態にするか、或は切替弁4をそのままにして、供給
元11からの圧搾空気又は計装空気を空油増圧器5に作
用させ、これから高圧に昇圧させた作動油をブースタ1
のシリンダ17のピストン18の一方(図の左方)の側
20に送入して、ピストン18を図の右方へ移動させ
る。空油増圧器5は、この操作を終えると作動油の送出
を止めて逆流防止状態になる。
Next, in order to restore the booster 1, the switching valve 4 is brought into the state shown in the figure, that is, the switching valve 4 is brought into a neutral switching state in which the flow of hydraulic oil having a diameter is stopped by the switching valve 4. Alternatively, with the switching valve 4 left as it is, compressed air or instrumentation air from the supply source 11 is caused to act on the air-oil pressure booster 5, and the working oil whose pressure has been increased to a high pressure is boosted by the booster 1
The cylinder 18 is fed to one side (left side in the drawing) of the piston 18 to move the piston 18 to the right side in the drawing. When this operation is completed, the air-oil pressure booster 5 stops the delivery of the hydraulic oil and enters the backflow prevention state.

【0025】次に、切替弁4を操作してブースタ1から
遮断弁10を径て切替弁4に至る作動油を、速度調整弁
9を通って油圧式操作機2に流れるようにすると、油圧
式操作機2の図における他方のシリンダ2bに作動油が
流入し、一方のシリンダ2aの中の作動油が速度調整弁
8を通って油タンク6に送り込まれる。これを終える
と、上に説明したのと同じ方法で、ブースタ1を復帰さ
せる。
Next, when the switching valve 4 is operated so that the hydraulic oil from the booster 1 through the shutoff valve 10 to the switching valve 4 is caused to flow through the speed adjusting valve 9 to the hydraulic operating device 2, the hydraulic pressure is increased. The hydraulic oil flows into the other cylinder 2b in the figure of the manual controller 2, and the hydraulic oil in the one cylinder 2a is sent to the oil tank 6 through the speed adjusting valve 8. When this is done, the booster 1 is restored in the same manner as described above.

【0026】13、14は、ブースタ1に設けられたリ
ミットスイッチであり、15、16は、油圧式操作機2
に設けられたリミットスイッチであって、これらのリミ
ットスイッチはブースタ1又は油圧式操作機2の作動状
態をキャッチして、空油増圧器5や切替弁4に、或はコ
ントロールボックス12に信号を送り、このコントロー
ルボックス12からの指令によって切替弁4及び空油増
圧器5を作動させて、この弁駆動装置全体を正しく操作
させるようになっている。
Reference numerals 13 and 14 are limit switches provided on the booster 1, and reference numerals 15 and 16 are hydraulic operating devices 2.
Limit switches provided in the above, these limit switches catch the operating state of the booster 1 or the hydraulic actuator 2 and send a signal to the pneumatic oil pressure booster 5 or the switching valve 4 or the control box 12. The switching valve 4 and the air-oil pressure booster 5 are operated in response to a command from the control box 12 so that the entire valve drive device can be operated correctly.

【0027】ブースタ1のシリンダ17の円柱部19が
貫通する端壁22には複数のシール部23及び24が設
けられ、これらシール部23及び24の間から油タンク
6に接続するドレン管7を設けたので、シリンダ17か
ら従ってブースタ1から作動油が外部に流れ出て附近を
汚すことがなく、また、作動油の漏失による消耗を防い
でいる。
A plurality of seal portions 23 and 24 are provided on the end wall 22 through which the cylindrical portion 19 of the cylinder 17 of the booster 1 penetrates, and the drain pipe 7 connected to the oil tank 6 is provided between the seal portions 23 and 24. Since it is provided, the hydraulic oil does not flow out from the cylinder 17 and hence from the booster 1 to the outside to contaminate the vicinity thereof, and the consumption due to the leakage of the hydraulic oil is prevented.

【0028】図2は、図1に示された空油増圧器5の構
造の一例を示した断面図であって、5aは空圧用シリン
ダ、5b及び5cは油圧用シリンダ、5d及び5eは空
圧用給排口である。図において、空圧用給排口5dから
圧搾空気又は計装空気が送入されると、ピストン5fが
右方へ押され、ピストン5fに直結された円柱部5g
は、油圧用シリンダ5bに油タンク6から作動油を吸入
させ、また、円柱部5hは油圧用シリンダ5c内の作動
油を配管25に送り出す。この配管25は、図1におけ
る配管25に相当する。また、油タンク6からの配管2
6は、図1における配管26に相当する。この時、空圧
用給排口5eからは空圧用シリンダ5a内の空気が大気
中へ排出される。
FIG. 2 is a sectional view showing an example of the structure of the pneumatic oil booster 5 shown in FIG. 1. 5a is a pneumatic cylinder, 5b and 5c are hydraulic cylinders, and 5d and 5e are empty cylinders. It is a pressure supply / discharge port. In the figure, when compressed air or instrumentation air is fed in from the pneumatic supply / discharge port 5d, the piston 5f is pushed to the right, and the columnar portion 5g directly connected to the piston 5f.
Causes hydraulic oil to be sucked into the hydraulic cylinder 5b from the oil tank 6, and the columnar portion 5h sends the hydraulic oil in the hydraulic cylinder 5c to the pipe 25. The pipe 25 corresponds to the pipe 25 in FIG. Also, the pipe 2 from the oil tank 6
6 corresponds to the pipe 26 in FIG. At this time, the air in the pneumatic cylinder 5a is discharged into the atmosphere from the pneumatic supply / discharge port 5e.

【0029】この空油増圧器5においては、圧搾空気又
は計装空気の空気用シリンダ5aへの給排を、空圧用給
排口5dと5eとを交互に切替えて行い、それに応じて
作動油を5c及び5bから交互に配管25へ送出させる
ことができる。なお、空圧用シリンダ5aに送入される
圧搾空気又は計装空気の圧力をpとすると、これと配管
25に送出される作動油の圧力p1との比は、
In the pneumatic oil booster 5, compressed air or instrumentation air is supplied to and discharged from the air cylinder 5a by alternately switching the pneumatic supply / discharge ports 5d and 5e, and the hydraulic oil is accordingly changed. Can be delivered to the pipe 25 alternately from 5c and 5b. When the pressure of the compressed air or instrumentation air sent to the pneumatic cylinder 5a is p, the ratio of this to the pressure p 1 of the hydraulic oil sent to the pipe 25 is

【数3】 である。(Equation 3) It is.

【0030】今仮に、円柱部5g及び5hの直径がシリ
ンダ5fの1/6であって、圧搾空気又は計装空気の圧
力pが5Kgf/cm2であると、上式は、次のようになる。
If the diameters of the cylindrical portions 5g and 5h are ⅙ of the cylinder 5f and the pressure p of compressed air or instrumentation air is 5 Kgf / cm 2 , the above equation is as follows. Become.

【数4】 従って、P1=175(Kgf/cm2)となり、P1は極めて
高い圧力である。
(Equation 4) Therefore, P 1 = 175 (Kgf / cm 2 ) and P 1 is an extremely high pressure.

【0031】この極めて高い圧力P1がブースタ1のシ
リンダ17のピストン18の一方の側20に加わった力
と、5Kgf/cm2の圧搾空気又は計装空気の圧力がシリン
ダ17のピストン18の他方の側21に加わった力との
関係は、
This extremely high pressure P 1 is applied to one side 20 of the piston 18 of the cylinder 17 of the booster 1 and the pressure of compressed air or instrumentation air of 5 Kgf / cm 2 is applied to the other side of the piston 18 of the cylinder 17. The relationship with the force applied to the side 21 of

【数5】 となる。(Equation 5) Becomes

【0032】先にブースタ1の復帰の操作について、空
油増圧器5によって高圧に昇圧させた作動油をブースタ
1のシリンダ17のピストン18の一方の側20に送入
してピストン18を図の右方へ移動させると述べたが、
ピストン18が右方へ移動するのは、上記の力の関係に
よるのである。
Regarding the return operation of the booster 1, the working oil whose pressure has been raised to a high pressure by the air-oil pressure booster 5 is fed to one side 20 of the piston 18 of the cylinder 17 of the booster 1 to move the piston 18 as shown in the figure. I said to move it to the right,
The movement of the piston 18 to the right is due to the above-mentioned force relationship.

【0033】この弁駆動装置のブースタ1は、既に説明
したように、復帰を空油増圧器5によって昇圧した作動
油を用いて行っているので、ブースタ1に復帰のための
余分のシリンダを必要とせず、構造が簡単である。
As described above, the booster 1 of this valve drive device uses the hydraulic oil whose pressure has been increased by the air-oil pressure booster 5, so that the booster 1 needs an extra cylinder for the return. The structure is simple.

【0034】[0034]

【発明の効果】本発明の弁駆動装置は、既に説明したよ
うなブースタを設けて高圧の作動油で油圧式操作機を作
動させるようにしたので、操作機が小さくて軽く、この
ため設置場所に制限を受けたり、架台を設ける必要が生
じたりすることが少なく、操作機そのものが安価になる
だけでなく他の費用も少なくてすみ、消費空気量が少な
くてすみ、操作機の出力が次第に低下して作業速度が遅
くなることもない。
Since the valve drive system of the present invention is provided with the booster as described above to operate the hydraulic operating machine with high pressure hydraulic oil, the operating machine is small and light, and therefore the installation location is small. There are few restrictions on installation and the need to install a pedestal, and not only the operating machine itself is cheaper but also other costs are lower, less air is consumed, and the operating machine output gradually increases. It does not decrease and work speed does not slow down.

【0035】更に、ブースタから作業油が流れ出て附近
を汚すことがなく、また、作業油の漏出による消耗もな
い。また、本発明の駆動装置では、ブースタの復帰に空
油増圧器を用いて昇圧した作動油を用いているので、ブ
ースタの構造は簡単なものである。
Further, the working oil does not flow out from the booster to contaminate the vicinity thereof, and the working oil is not consumed due to leakage. Further, in the drive device of the present invention, since the hydraulic oil boosted by the air-oil pressure booster is used to restore the booster, the structure of the booster is simple.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の弁駆動装置の一実施例を示す配管系統
図である。
FIG. 1 is a piping system diagram showing an embodiment of a valve drive device of the present invention.

【図2】図1における空油増圧器の一例を示す断面図で
ある。
FIG. 2 is a cross-sectional view showing an example of the air-oil pressure booster in FIG.

【符号の説明】[Explanation of symbols]

1 ブースタ 2 油圧式操作機 3 バルブ 4 切替弁 5 空油増圧器 6 油タンク 7 ドレン管 17 シリンダ 18 ピストン 19 円柱部 20 シリンダのピストンの一方の側 21 シリンダのピストンの他方の側 22 端壁 23、24 シール部 1 Booster 2 Hydraulic Operator 3 Valve 4 Switching Valve 5 Pneumatic Oil Booster 6 Oil Tank 7 Drain Pipe 17 Cylinder 18 Piston 19 Cylindrical Part 20 One Side of Cylinder Piston 21 The Other Side of Cylinder Piston 22 End Wall 23 , 24 Seal part

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ブースタに圧搾空気又は計装空気を送入
して圧力を上昇させた作動油を送出させて、バルブに装
着した油圧式操作機を作動させてバルブを開閉するよう
にした弁駆動装置であって、このブースタは、シリンダ
に大径のピストンを装入し、このピストンの一方の側に
同軸に設けた小径の円柱部をシリンダの一方の端壁を貫
通して外方へ密封状に突出し、このシリンダのピストン
の一方の側に作動油を満たし、このシリンダのピストン
の他方の側に圧搾空気又は計装空気を装入するとピスト
ンが一方に移動して、その空気圧に対してピストンに作
用する空気と油との作用面積の比に反比例して圧力が上
昇した作動油を送出し、シリンダのピストンの一方の側
に接続した空油増圧器に圧搾空気又は計装空気を装入す
ると、この空油増圧器から圧力を上昇させた作動油をシ
リンダのピストンの一方の側に送入してピストンを他方
へ移動させるように構成したことを特徴とする弁駆動装
置。
1. A valve in which compressed air or instrumented air is sent into a booster to send out hydraulic oil whose pressure has been raised, and a hydraulic operating device mounted on the valve is operated to open and close the valve. This booster is a drive device in which a large-diameter piston is inserted into a cylinder, and a small-diameter cylindrical portion coaxially provided on one side of the piston penetrates one end wall of the cylinder to the outside. When projecting in a sealed manner, one side of the piston of this cylinder is filled with hydraulic oil, and compressed air or instrumentation air is charged into the other side of the piston of this cylinder, the piston moves to one side and The working oil whose pressure rises in inverse proportion to the ratio of the working area of air and oil acting on the piston is delivered, and compressed air or instrumentation air is supplied to the air-oil pressure booster connected to one side of the cylinder piston. When charged, this air oil pressure increase A valve drive device configured to feed hydraulic oil whose pressure has been increased from a container to one side of a piston of a cylinder to move the piston to the other side.
【請求項2】 上記の円柱部が貫通する端壁に設けられ
た複数のシール部の間から油タンクに接続するドレン管
を設けた請求項1記載の弁駆動装置。
2. The valve drive device according to claim 1, further comprising a drain pipe connected to the oil tank through a plurality of seal portions provided on an end wall through which the columnar portion penetrates.
JP7278411A 1995-10-02 1995-10-02 Valve drive Expired - Fee Related JP2913381B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7278411A JP2913381B2 (en) 1995-10-02 1995-10-02 Valve drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7278411A JP2913381B2 (en) 1995-10-02 1995-10-02 Valve drive

Publications (2)

Publication Number Publication Date
JPH09100802A true JPH09100802A (en) 1997-04-15
JP2913381B2 JP2913381B2 (en) 1999-06-28

Family

ID=17596977

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7278411A Expired - Fee Related JP2913381B2 (en) 1995-10-02 1995-10-02 Valve drive

Country Status (1)

Country Link
JP (1) JP2913381B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005226804A (en) * 2004-02-16 2005-08-25 Sadayuki Nakanishi Gas/hydraulic power converter
JP2007057053A (en) * 2005-08-26 2007-03-08 Toyooki Kogyo Co Ltd Hydraulic device
JP2007321942A (en) * 2006-06-05 2007-12-13 Toyooki Kogyo Co Ltd Hydraulic unit
CN100366970C (en) * 2004-03-03 2008-02-06 中西定之 Gas and oil pressing type driving device
JP2008057786A (en) * 2007-09-25 2008-03-13 Toyooki Kogyo Co Ltd Hydraulic device
CN104100606A (en) * 2013-04-11 2014-10-15 比尔克特韦尔克有限公司 Pneumatic drive and process for gathering the performance of a pneumatic drive

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005226804A (en) * 2004-02-16 2005-08-25 Sadayuki Nakanishi Gas/hydraulic power converter
CN100366970C (en) * 2004-03-03 2008-02-06 中西定之 Gas and oil pressing type driving device
JP2007057053A (en) * 2005-08-26 2007-03-08 Toyooki Kogyo Co Ltd Hydraulic device
JP2007321942A (en) * 2006-06-05 2007-12-13 Toyooki Kogyo Co Ltd Hydraulic unit
JP2008057786A (en) * 2007-09-25 2008-03-13 Toyooki Kogyo Co Ltd Hydraulic device
CN104100606A (en) * 2013-04-11 2014-10-15 比尔克特韦尔克有限公司 Pneumatic drive and process for gathering the performance of a pneumatic drive

Also Published As

Publication number Publication date
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