JPS6298076A - Motor-driven valve actuator - Google Patents

Motor-driven valve actuator

Info

Publication number
JPS6298076A
JPS6298076A JP23685185A JP23685185A JPS6298076A JP S6298076 A JPS6298076 A JP S6298076A JP 23685185 A JP23685185 A JP 23685185A JP 23685185 A JP23685185 A JP 23685185A JP S6298076 A JPS6298076 A JP S6298076A
Authority
JP
Japan
Prior art keywords
motor
current
signal
value
timer
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
JP23685185A
Other languages
Japanese (ja)
Other versions
JPH0346705B2 (en
Inventor
Nakashi Kawaguchiya
川口屋 仲
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.)
M SYST GIKEN KK
Original Assignee
M SYST GIKEN KK
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 M SYST GIKEN KK filed Critical M SYST GIKEN KK
Priority to JP23685185A priority Critical patent/JPS6298076A/en
Publication of JPS6298076A publication Critical patent/JPS6298076A/en
Publication of JPH0346705B2 publication Critical patent/JPH0346705B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To simplify the arrangement of a motor-driven adjusting valve, by stopping the supply of electrical current to a motor when the supply current to the motor exceeds a predetermined value. CONSTITUTION:A current detector 6 detects supply current to a motor 4 for driving an motor-driven adjusting valve 1. A comparator 7 compares the detected value Ix of the supply current to the motor 4 detected by the current detector 6 with a set current value Is, and if Ix>Is, it delivers a signal to a timer 8 which is turn delivers a signal to a hold circuit 9 when the signal from the comparator 7 continues exceeding a predetermined time. The hold circuit 9 holds the signal from the timer 8 for a predetermined time, and then delivers the signal to a drive device 3 which stops the supply of current to the motor 4.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は閉ループ制御系からなる電動弁操作器の改良に
関する。
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an improvement in an electric valve operator comprising a closed loop control system.

〈従来の技術〉 電動調節弁の開度を制御する閉ループ制御系においては
、開度設定値と実際の開度検出値との偏差に応じて電動
弁を駆動し、偏差をゼロにするように制御が行なわれる
<Prior art> In a closed-loop control system that controls the opening of an electric control valve, the electric valve is driven according to the deviation between the opening setting value and the actual opening detection value, so as to reduce the deviation to zero. Control takes place.

一方、従来では、上述の閉ループ制御系とは別に、調節
弁が全開または全開の状態になったことを弁体の位置を
検出するりミントスイッチにより検出してモータへの給
電を停止し、閉ループ制御系の何らかの異常により全開
または全開になったときにモータへ過電流が長時間流れ
るのを防止していた。
On the other hand, in the past, in addition to the above-mentioned closed-loop control system, when the control valve is fully open or fully open, it is detected by the position of the valve body or by a mint switch, and the power supply to the motor is stopped, and the control valve is closed-loop. This prevents overcurrent from flowing to the motor for a long time when the motor is fully opened or fully opened due to some abnormality in the control system.

〈発明が解決しようとする問題点〉 上述のように、従来ではモータを保護する目的から調節
弁の全開または全閉を検出するりミソトスインチが必要
であったので、構成が複雑化するとともにコストが上昇
するという問題があった。
<Problems to be solved by the invention> As mentioned above, in the past, for the purpose of protecting the motor, it was necessary to detect whether the control valve was fully open or fully closed, and a misotosinch was required, which complicated the configuration and increased costs. There was a problem with rising.

また、従来では、弁体が異物を噛み込んで設定開度以外
の開度で停止したときには、弁体が停止したことを直ち
に検出する手段がないので、モータに過電流が長時間流
れることになり、この結果、モータを損傷するという事
態を招いていた。
Additionally, in the past, when the valve body caught a foreign object and stopped at an opening other than the set opening, there was no way to immediately detect that the valve body had stopped, so an overcurrent could flow through the motor for a long time. As a result, the motor was damaged.

〈問題点を解決するための手段〉 本発明は、電動弁の開度を制御する制御装置と上記電動
弁を駆動する駆動装置を有する閉ループ制御系からなる
電動弁操作器において、上記電動弁を駆動するモータの
供給電流を検出する電流検出手段と、この電流検出手段
において検出された電流値と設定電流値とを比較する比
較手段と、この比較手段の出力に応じて計時動作を行な
うタイマ手段と、このタイマ手段の出力を一定保持して
上記駆動装置に与える信号保持手段とを備え、上記モー
タの供給電流が一定値以上になると上記モータへの電流
の供給を停止することをリセットする。
<Means for Solving the Problems> The present invention provides an electric valve operator comprising a closed loop control system having a control device for controlling the opening degree of the electric valve and a drive device for driving the electric valve. Current detection means for detecting the supply current of the motor to be driven; comparison means for comparing the current value detected by the current detection means with a set current value; and timer means for performing a timing operation according to the output of the comparison means. and a signal holding means for holding the output of the timer means at a constant value and giving it to the driving device, and resetting to stop the supply of current to the motor when the current supplied to the motor exceeds a certain value.

〈実施例〉 以下、本発明の一実施例を図面に基づいて説明する。<Example> Hereinafter, one embodiment of the present invention will be described based on the drawings.

電動調節弁1は、制御装置2と駆動装置3を有する閉ル
ープ制御系によりその開度が制御される。
The opening degree of the electric control valve 1 is controlled by a closed loop control system having a control device 2 and a drive device 3.

制御装置2は、電動調節弁lの開度設定値rと実際の開
度の検出値である開度フィードバック値Xとの偏差2に
応じて、電動調節弁1の開度が設定値になるように制御
信号Cを駆動装置3に与える。
The control device 2 sets the opening degree of the electric control valve 1 to the set value according to the deviation 2 between the opening degree setting value r of the electric control valve l and the opening degree feedback value X, which is the detected value of the actual opening degree. A control signal C is given to the drive device 3 as shown in FIG.

駆動装置3は、この制御信号Cに応じて電動調節弁1の
モータ4に電流を供給し、電動調節弁1を駆動する。
The drive device 3 supplies current to the motor 4 of the electric control valve 1 in accordance with this control signal C, and drives the electric control valve 1.

電流ヰ★出器6は、電動調節弁1を駆動するモータ4の
供給電流を検出する。比較器7は、電流検出器6が検出
したモータ4の供給電流の検出値1xと予め定められた
電流設定値Isとの大小比較を行ない、I x>I s
のときにタイマ8に信号を与える。タイマ8は、比較器
7からの信号に応じて計時動作を行ない、比較器7から
の信号が一定時間以上続いてタイムアツプしたときにホ
ールド回路9に信号を与える。比較器7からの信号が一
定時間以上続かないときは、タイマ回路8は比較器7か
らの信号が消滅すると同時に計時動作を停止し、ホール
ド回路9に信号を与えない。ホールド回路9は、タイマ
8からの信号を一定保持し、この保持した信号を駆動装
置3に与える。このとき、駆動装置3はモータ4への電
流の供給を停止する。
The current generator 6 detects the current supplied to the motor 4 that drives the electric control valve 1 . The comparator 7 compares the detected value 1x of the supply current of the motor 4 detected by the current detector 6 with a predetermined current setting value Is, and determines that I x > I s
A signal is given to timer 8 when . The timer 8 performs a timing operation in response to the signal from the comparator 7, and provides a signal to the hold circuit 9 when the signal from the comparator 7 continues for a certain period of time and times out. When the signal from the comparator 7 does not continue for more than a certain period of time, the timer circuit 8 stops the timekeeping operation as soon as the signal from the comparator 7 disappears, and does not provide a signal to the hold circuit 9. The hold circuit 9 holds the signal from the timer 8 constant and supplies the held signal to the drive device 3. At this time, the drive device 3 stops supplying current to the motor 4.

ホールド回路9には、さらに開度設定値rと開度フィー
ドバック値Xとの偏差2が与えられ、この偏差2の極性
が変わるとホールド回路9はリセットされる。
The hold circuit 9 is further given a deviation 2 between the opening degree setting value r and the opening degree feedback value X, and when the polarity of this deviation 2 changes, the hold circuit 9 is reset.

いま、開度設定値「が全開に設定され、電動調節弁1が
閉方向に駆動され、全閉状態になって弁体が停止したと
きに、制御装置2の何らかの異常により制御信号Cが出
力され続けたとすると、駆動装置3はこの制御信号Cに
応じてモータ4へさらに電流を供給する。この場合、電
動調節弁1の弁体5が全閉位置にあって駆動が阻止され
た状態にあるので、モータ4に流れる電流は急激に増大
しようとする。このとき、電流検出器6により検出した
モータ4の供給電流の検出値lxは電流設定値Isより
大きくなり、タイマ8は計時動作を開始する。そして、
Jx>Isの状態が続いてタイマ8がタイムアツプする
と、ホールド回路9は駆動装置3に信号を与え、駆動装
置3はモータ4への電流の供給を停止する。
Now, when the opening set value "is set to fully open, the electric control valve 1 is driven in the closing direction, and the valve body has stopped in the fully closed state, the control signal C is output due to some abnormality in the control device 2. If this continues, the drive device 3 further supplies current to the motor 4 in response to the control signal C. In this case, the valve body 5 of the electric control valve 1 is in the fully closed position and the drive is blocked. Therefore, the current flowing through the motor 4 is about to increase rapidly. At this time, the detected value lx of the supply current of the motor 4 detected by the current detector 6 becomes larger than the current setting value Is, and the timer 8 starts the timing operation. start, and
When the state of Jx>Is continues and the timer 8 times up, the hold circuit 9 gives a signal to the drive device 3, and the drive device 3 stops supplying current to the motor 4.

次に、開度設定値「が開方向に設定が変更されると、偏
差2の極性が変わり、ホールド回路9がリセットされ、
駆動装置3はモータ4への電流の供給を再開し、電動調
節弁1は開方向へ駆動される。そして、全開になったと
きに制御装置2の何らかの異常によりモータ4に過電流
が流れようとしても、上述と同様の動作によりモータ4
への電流の供給が直ちに停止される。
Next, when the opening setting value "is changed to the opening direction, the polarity of deviation 2 changes, the hold circuit 9 is reset,
The drive device 3 resumes supplying current to the motor 4, and the electric control valve 1 is driven in the opening direction. Even if an overcurrent attempts to flow to the motor 4 due to some abnormality in the control device 2 when the motor is fully opened, the same operation as described above will cause the motor 4 to
The supply of current to is immediately stopped.

上述の動作は、電動調節弁1が全開または全開の場合以
外に、例えば弁体5が異物を噛み込んで電動調節弁1が
開度設定値rとは異なる開度で停止した場合にも実行さ
れ、モータ4の負荷が急激に増大しlx>Isとなるこ
とにより、駆動装置3はモータ4への電流の供給を停止
する。また、異物を噛み込んで弁体5が停止したけれど
も流体の作用等により短時間で異物が除去されたときに
は、モータ4の負荷が同時に減少するのでlx<Isと
なり、タイマ8からホールド回路9に信号が与えられず
、駆動装置3はモータ4への電流の供給を停止しない。
The above-mentioned operation is performed not only when the electric control valve 1 is fully open or fully open, but also when the electric control valve 1 stops at an opening degree different from the opening degree setting value r, for example, due to the valve body 5 getting caught in a foreign object. As a result, the load on the motor 4 increases rapidly and lx>Is, and the drive device 3 stops supplying current to the motor 4. Furthermore, when the valve body 5 stops due to a foreign object being caught, but the foreign object is removed in a short time due to the action of fluid, etc., the load on the motor 4 decreases at the same time, so lx<Is, and the hold circuit 9 is transferred from the timer 8 to the hold circuit 9. No signal is given and the drive device 3 does not stop supplying current to the motor 4.

したがって、異物を含んだ流体によって電動調節弁1が
頻繁に停止することがない。
Therefore, the electric control valve 1 does not stop frequently due to fluid containing foreign matter.

〈発明の効果〉 以上説明したように、本発明においては、電動調節弁を
駆動するモータの供給電流を検出し、この電流が設定値
より太き(なると、モータへの電流の供給を停止するよ
うにしたので、全開と全閉を検出する従来のリミ・歩ト
スインチが不要になり、電動調節弁の構成を簡単化して
コストダウンが達成できる。さらに、弁体が異物を噛む
込んで停止したときにも直ちにモータへの電流の供給を
停止することができるので、モータに過電流が長時間流
れることがなく、モータの損傷を防止することができる
。さらに、本発明の電動弁操作器では、弁体を押し込ん
だ状態で停止させることができる。
<Effects of the Invention> As explained above, in the present invention, the current supplied to the motor that drives the electric control valve is detected, and when this current becomes thicker than a set value, the supply of current to the motor is stopped. This eliminates the need for conventional limit and foot switches to detect fully open and fully closed, simplifying the configuration of the electric control valve and reducing costs.Furthermore, the valve body can stop due to foreign matter getting caught in it. Since the supply of current to the motor can be immediately stopped even when the electric valve operator of the present invention , it can be stopped with the valve body pushed in.

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

図面は本発明実施例の基本構成を示すブロック図である
。 1・・−電動調節弁 2・−・制御装置 3−駆動装置 4−・モータ 6−・電流検出器 7−比較器 8・−タイマ 9−・ホールド回路
The drawing is a block diagram showing the basic configuration of an embodiment of the present invention. 1...-Electric control valve 2--Control device 3-Drive device 4--Motor 6--Current detector 7-Comparator 8--Timer 9--Hold circuit

Claims (2)

【特許請求の範囲】[Claims] (1)電動弁の開度を制御する制御装置と上記電動弁を
駆動する駆動装置を有する閉ループ制御系からなる電動
弁操作器において、上記電動弁を駆動するモータの供給
電流を検出する電流検出手段と、この電流検出手段にお
いて検出された電流値と設定電流値とを比較する比較手
段と、この比較手段の出力に応じて計時動作を行なうタ
イマ手段と、このタイマ手段の出力を一定保持して上記
駆動装置に与える信号保持手段とを備え、上記モータの
供給電流が一定値以上になると上記モータへの電流の供
給を停止することを特徴とする電動弁操作器。
(1) In a motorized valve operator consisting of a closed loop control system having a control device that controls the opening degree of the motorized valve and a drive device that drives the motorized valve, current detection detects the supply current of the motor that drives the motorized valve. a comparison means for comparing the current value detected by the current detection means with a set current value; a timer means for performing a timing operation according to the output of the comparison means; and a timer means for keeping the output of the timer means constant. and a signal holding means for applying a signal to the drive device, the electric valve operating device being characterized in that it stops supplying current to the motor when the current supplied to the motor exceeds a certain value.
(2)上記電動弁の開度設定値と開度フィードバック値
との偏差の極性が変わると上記信号保持手段をリセット
する特許請求の範囲第1項記載の電動弁操作器。
(2) The electric valve operating device according to claim 1, wherein the signal holding means is reset when the polarity of the deviation between the opening degree setting value and the opening degree feedback value of the electric valve changes.
JP23685185A 1985-10-23 1985-10-23 Motor-driven valve actuator Granted JPS6298076A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23685185A JPS6298076A (en) 1985-10-23 1985-10-23 Motor-driven valve actuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23685185A JPS6298076A (en) 1985-10-23 1985-10-23 Motor-driven valve actuator

Publications (2)

Publication Number Publication Date
JPS6298076A true JPS6298076A (en) 1987-05-07
JPH0346705B2 JPH0346705B2 (en) 1991-07-17

Family

ID=17006736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23685185A Granted JPS6298076A (en) 1985-10-23 1985-10-23 Motor-driven valve actuator

Country Status (1)

Country Link
JP (1) JPS6298076A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6449778A (en) * 1987-08-20 1989-02-27 Seibu Electric & Machinery Co Control system for valve driving actuator
FR2674018A1 (en) * 1991-03-12 1992-09-18 Knebel & Roettger Fa METHOD FOR DETERMINING THE RELATIVE OPENING POSITION OF THE ELECTRICALLY CONTROLLED COLD AND HOT WATER VALVE OF A BATTERY OF SANITARY MIXTURE.
JPH102449A (en) * 1996-06-14 1998-01-06 Kawaden:Kk Actuator action monitoring device for valve

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57130075U (en) * 1981-02-09 1982-08-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57130075U (en) * 1981-02-09 1982-08-13

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6449778A (en) * 1987-08-20 1989-02-27 Seibu Electric & Machinery Co Control system for valve driving actuator
FR2674018A1 (en) * 1991-03-12 1992-09-18 Knebel & Roettger Fa METHOD FOR DETERMINING THE RELATIVE OPENING POSITION OF THE ELECTRICALLY CONTROLLED COLD AND HOT WATER VALVE OF A BATTERY OF SANITARY MIXTURE.
BE1006830A3 (en) * 1991-03-12 1995-01-03 Knebel & Roettger Fa Detection method of position opening on the valve hot and cold water, operated electric battery health mixture.
JPH102449A (en) * 1996-06-14 1998-01-06 Kawaden:Kk Actuator action monitoring device for valve

Also Published As

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