JPH05297958A - Remote control type automatic control valve - Google Patents
Remote control type automatic control valveInfo
- Publication number
- JPH05297958A JPH05297958A JP12266692A JP12266692A JPH05297958A JP H05297958 A JPH05297958 A JP H05297958A JP 12266692 A JP12266692 A JP 12266692A JP 12266692 A JP12266692 A JP 12266692A JP H05297958 A JPH05297958 A JP H05297958A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- control valve
- sensor
- automatic control
- valve
- 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
Links
Landscapes
- Control Of Fluid Pressure (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、流体配管に取り付けて
流体の圧力、温度、流量等を制御する弁に関し、特にプ
ロセス量の検出、目標値との比較、偏差に基づく判断・
指令等を信号的に処理して、弁体を操作する電動機等の
駆動部を制御する自動制御弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve which is attached to a fluid pipe to control the pressure, temperature, flow rate, etc. of a fluid, and particularly to detect a process amount, compare it with a target value, and make a judgment based on a deviation.
The present invention relates to an automatic control valve that processes a command or the like as a signal and controls a drive unit such as an electric motor that operates a valve body.
【0002】[0002]
【従来の技術】従来の自動制御弁は、例えば特開昭63
−20603号公報に示されている。これは、調節ねじ
を回転させて軸方向に移動させその移動により圧力設定
ばねの付勢状態を変更することにより弁の設定圧力を調
節するように構成され、調節ねじの位置と設定圧力との
関係に基づいて調節ねじの軸方向の移動を電動機によっ
て行うようにしたものである。この自動設定減圧弁を遠
隔操作する場合は、図3に示すような構成になる。即
ち、自動設定減圧弁は減圧弁70、調整部71、駆動部
72から成り、調整部71は上記の圧力設定ばねや調節
ねじ等が対応し、駆動部72には同じく調節ねじを移動
させる電動機や電動機の駆動を制御する制御部等が対応
する。また73は減圧弁70の二次側に接続された熱交
換器等の蒸気使用装置、74は蒸気使用装置73に供給
する流体の圧力を検出する圧力センサ、75は圧力セン
サ74から入力される圧力信号と76から入力される設
定圧力目標値とを比較し、駆動部72をして比例動作、
あるいは微分・積分動作せしめる調節計であり、自動設
定減圧弁や圧力センサ74の遠隔に配置される。77,
78は電気信号線である。2. Description of the Related Art A conventional automatic control valve is disclosed, for example, in Japanese Patent Laid-Open No. 63-63.
It is disclosed in Japanese Patent Publication No. -20603. This is configured to adjust the set pressure of the valve by rotating the adjusting screw to move it in the axial direction and changing the urging state of the pressure setting spring by the movement. The motor is used to move the adjusting screw in the axial direction based on the relationship. When remotely operating this automatic setting pressure reducing valve, the configuration is as shown in FIG. That is, the automatic setting pressure reducing valve is composed of the pressure reducing valve 70, the adjusting unit 71, and the driving unit 72. The adjusting unit 71 corresponds to the pressure setting spring, the adjusting screw, and the like, and the driving unit 72 also moves the adjusting screw. And a control unit that controls the drive of the electric motor. Further, 73 is a steam using device such as a heat exchanger connected to the secondary side of the pressure reducing valve 70, 74 is a pressure sensor for detecting the pressure of the fluid supplied to the steam using device 73, and 75 is input from the pressure sensor 74. The pressure signal is compared with the set pressure target value input from 76, and the drive unit 72 is operated to perform a proportional operation,
Alternatively, it is a controller for performing a differential / integral operation, and is arranged remote from the automatic setting pressure reducing valve and the pressure sensor 74. 77,
Reference numeral 78 is an electric signal line.
【0003】[0003]
【発明が解決しようとする課題】上記従来のものでは、
自動設定減圧弁と圧力センサとは近くに配置されるが、
調節計が自動設定減圧弁及び圧力センサの遠隔に配置さ
れる構成であるので、調節計と自動設定減圧弁及び圧力
センサを連結する電気信号線の配線コストがかさみ、ま
たノイズが混入し易い問題があった。従って、本発明の
技術的課題は、配線コストを低減すると共にノイズの混
入し難い遠隔操作式自動制御弁を得ることである。SUMMARY OF THE INVENTION In the above conventional one,
Although the automatic setting pressure reducing valve and the pressure sensor are placed close to each other,
Since the controller is arranged remotely from the automatic setting pressure reducing valve and the pressure sensor, the wiring cost of the electric signal line connecting the controller with the automatic setting pressure reducing valve and the pressure sensor is high, and noise easily mixes in. was there. Therefore, a technical problem of the present invention is to obtain a remote control type automatic control valve which reduces wiring cost and is less likely to mix noise.
【0004】[0004]
【課題を解決するための手段】上記の技術的課題を解決
するために講じた本発明の技術的手段は、自動制御弁の
近くにプロセス量を検出するセンサを配置し、センサか
らの信号が入力され設定目標値と比較し偏差に基づいて
自動制御弁の駆動部を制御する調節計を自動制御弁及び
センサの遠隔に配置した遠隔操作式自動制御弁におい
て、自動制御弁の内部にセンサからの信号の変換部を設
け、変換部と調節計とを電気信号線で連結したものであ
る。The technical means of the present invention taken to solve the above-mentioned technical problem is to arrange a sensor for detecting a process amount near an automatic control valve, and a signal from the sensor is In a remote-controlled automatic control valve in which a controller that controls the drive part of the automatic control valve based on the deviation that is input and compared with the set target value is located remotely from the automatic control valve and sensor, The signal conversion unit is provided, and the conversion unit and the controller are connected by an electric signal line.
【0005】[0005]
【作用】上記の技術的手段の作用は下記の通りである。
自動制御弁の内部にセンサからの信号の変換部を設け、
変換部と調節計とを電気信号線で連結したので、センサ
から変換部までの電気信号線を短くでき、配線コストを
低減できると共にノイズが混入し難くなる。The operation of the above technical means is as follows.
The converter of the signal from the sensor is installed inside the automatic control valve.
Since the conversion unit and the controller are connected by the electric signal line, the electric signal line from the sensor to the conversion unit can be shortened, the wiring cost can be reduced, and noise is less likely to be mixed.
【0006】[0006]
【実施例】上記の技術的手段の具体例を示す実施例を説
明する(図1と図2参照)。図2に自動制御弁としての
自動設定減圧弁を示す。弁ケ―シングで入口1と出口
2、主弁口3を形成し、主弁口3は主弁ばね4で閉弁方
向に付勢された主弁体5で開閉する。ピストン9をシリ
ンダ―10内に摺動自在に配置し、ピストン9の下部ピ
ストン棒は前記主弁体5の上部突起部に当接する。ピス
トン9の下面には出口2側の流体圧力が作用し、上面に
は入口1側の流体圧力が一次圧通路11,12を通して
パイロット弁13で制御されて導入される。パイロット
弁13は閉弁方向にばねで付勢され、弁棒を介してダイ
ヤフラム14の下面に当り、その変位により開弁方向の
操作力を受ける。EXAMPLE An example showing a concrete example of the above technical means will be described (see FIGS. 1 and 2). FIG. 2 shows an automatically set pressure reducing valve as an automatic control valve. An inlet 1 and an outlet 2 and a main valve opening 3 are formed by valve casing, and the main valve opening 3 is opened and closed by a main valve body 5 biased in a valve closing direction by a main valve spring 4. The piston 9 is slidably arranged in the cylinder 10, and the lower piston rod of the piston 9 contacts the upper protrusion of the main valve body 5. The fluid pressure on the outlet 2 side acts on the lower surface of the piston 9, and the fluid pressure on the inlet 1 side is introduced to the upper surface through the primary pressure passages 11 and 12 under the control of the pilot valve 13. The pilot valve 13 is biased by a spring in the valve closing direction, hits the lower surface of the diaphragm 14 via the valve rod, and receives the operating force in the valve opening direction due to its displacement.
【0007】ダイヤフラム14の上面にはダイヤフラム
押え15を介して圧力設定ばね16の下端が当接し、弾
性力が作用する。圧力設定ばね16の上端にはばね受け
部材17及びボ―ル18を介して調節ねじ19の下端が
当り、調節ねじ19の回転による進退で、圧力設定ばね
16の圧縮量を調節して、ダイヤフラム14に作用する
弾性力を調節できるようになっている。調節ねじ19
は、弁ケ―シングの一部を成すばね収容ケ―ス20に固
定した軸受部21にねじ結合している。ダイヤフラム1
4の下面は出口2に連通する二次側検出通路24を通し
てダイヤフラム室25に面する。The lower end of the pressure setting spring 16 abuts on the upper surface of the diaphragm 14 via the diaphragm retainer 15 and an elastic force acts. The lower end of the adjusting screw 19 contacts the upper end of the pressure setting spring 16 via the spring receiving member 17 and the ball 18, and the amount of compression of the pressure setting spring 16 is adjusted by moving the adjusting screw 19 forward and backward to adjust the diaphragm. The elastic force acting on 14 can be adjusted. Adjustment screw 19
Is screwed to a bearing portion 21 fixed to a spring housing case 20 forming a part of the valve casing. Diaphragm 1
The lower surface of 4 faces the diaphragm chamber 25 through the secondary side detection passage 24 communicating with the outlet 2.
【0008】調節ねじ19が左右に回転すると、圧力設
定ばね16のダイヤフラム14を押し下げる弾性力が変
る。従って、ダイヤフラム14が下方に変位するとパイ
ロット弁13が押し下げられて開弁し、入口1の流体が
通路11,12を通ってピストン9の上方に導入され、
主弁体5がピストン9で押し下げられて主弁口3が開か
れ、入口1の流体が出口2に流れる。二次側の圧力が上
昇すると二次側検出通路24を通してダイヤフラム室2
5の圧力も上昇し、ダイヤフラム14が上方に変位す
る。その結果パイロット弁13が押し上げられて閉弁し
ピストン9の上方への供給流体が減少し主弁体5が主弁
ばね4で押し上げられ、主弁口3が塞がれる。以上を繰
り返して二次側の圧力を所望の値に保持する。When the adjusting screw 19 rotates left and right, the elastic force of pushing down the diaphragm 14 of the pressure setting spring 16 changes. Therefore, when the diaphragm 14 is displaced downward, the pilot valve 13 is pushed down and opened, and the fluid at the inlet 1 is introduced above the piston 9 through the passages 11 and 12.
The main valve body 5 is pushed down by the piston 9, the main valve opening 3 is opened, and the fluid at the inlet 1 flows to the outlet 2. When the pressure on the secondary side rises, the diaphragm chamber 2 passes through the secondary side detection passage 24.
The pressure of 5 also rises, and the diaphragm 14 is displaced upward. As a result, the pilot valve 13 is pushed up and closed, the fluid supplied to the upper part of the piston 9 is reduced, the main valve body 5 is pushed up by the main valve spring 4, and the main valve port 3 is closed. By repeating the above, the pressure on the secondary side is maintained at a desired value.
【0009】設定圧力を変更する時は調節ねじ19を回
転して圧力設定ばね16のダイヤフラム14への付勢力
を変更する。この調節ねじ19を回転せしめる機構を以
下に説明する。調節ねじ19の上部に電動機26の出力
軸27を嵌合する嵌合孔28を形成し、嵌合孔28の周
囲には2か所切欠部29を形成する。出力軸27にピン
30を貫通させて固定し、ピン30の両端を切欠部29
に嵌合して、出力軸27を嵌合孔28に嵌合する。電動
機26は出力軸27を有する減速機31と減速機31の
入力側に結合されたモ―タ32とから成り、収容ケ―ス
20に固定した取付台33に固定され、カバ―34で覆
われる。出力軸27の定位置に於ける回転に対し、調節
ねじ19はピン30を介して回転しながら軸方向に移動
する。カバ―34内にモ―タ32へ駆動信号を供給する
モ―タ駆動回路35を配置する。取付台32に調節ねじ
19の軸方向の位置を検出するポテンショ・メ―タ36
を取り付ける。When changing the set pressure, the adjusting screw 19 is rotated to change the urging force of the pressure setting spring 16 to the diaphragm 14. The mechanism for rotating the adjusting screw 19 will be described below. A fitting hole 28 for fitting the output shaft 27 of the electric motor 26 is formed in the upper part of the adjusting screw 19, and two notches 29 are formed around the fitting hole 28. The pin 30 is passed through the output shaft 27 and fixed, and both ends of the pin 30 are cut out 29
Then, the output shaft 27 is fitted into the fitting hole 28. The electric motor 26 is composed of a speed reducer 31 having an output shaft 27 and a motor 32 connected to the input side of the speed reducer 31, and is fixed to a mounting base 33 fixed to the housing case 20 and covered with a cover 34. Be seen. With respect to the rotation of the output shaft 27 at the fixed position, the adjusting screw 19 moves in the axial direction while rotating through the pin 30. A motor drive circuit 35 for supplying a drive signal to the motor 32 is arranged in the cover 34. A potentiometer 36 for detecting the axial position of the adjusting screw 19 on the mounting base 32.
Attach.
【0010】図1に上記自動設定減圧弁を遠隔操作する
ブロック図を示す。自動設定減圧弁69は減圧弁50、
調整部51、駆動部52、変換部55から成り、調整部
51は上記の圧力設定ばね16や調節ねじ19等が対応
し、駆動部52には同じく電動機26やモ―タ駆動回路
35やポテンショ・メ―タ36等が対応する。また53
は減圧弁50の二次側に接続された熱交換器等の蒸気使
用装置、54は蒸気使用装置53に供給する流体の圧力
を検出する圧力センサ、55は圧力センサ54から入力
される信号の変換部、56は設定圧力目標値と変換部5
5から入力される信号とを比較し微分・積分演算を行
い、変換部55にモ―タ駆動信号を送信する調節計であ
り、自動設定減圧弁や圧力センサ54の遠隔に配置され
る。57,58は電気信号線である。変換部55は電源
59、センサ入力回路60、CPU61、通信回路62
をもって構成され、センサ入力回路60は増幅器A/D
変換器を有し、圧力センサ54からの圧力信号をデジタ
ル信号に変換する。調節計56は電源63、通信回路6
4、CPU65、設定入力回路66、表示回路67をも
って構成され、CPU65には予め調節ねじ19の位置
と設定圧力の関係を記憶させている。FIG. 1 shows a block diagram for remotely operating the automatic setting pressure reducing valve. The automatic setting pressure reducing valve 69 is the pressure reducing valve 50,
The adjusting unit 51, the driving unit 52, and the converting unit 55 correspond to the pressure setting spring 16 and the adjusting screw 19 described above, and the driving unit 52 also includes the electric motor 26, the motor driving circuit 35, and the potentiometer. -The meter 36 etc. correspond. Again 53
Is a steam using device such as a heat exchanger connected to the secondary side of the pressure reducing valve 50, 54 is a pressure sensor for detecting the pressure of the fluid supplied to the steam using device 53, and 55 is a signal input from the pressure sensor 54. The converter 56 is a set pressure target value and the converter 5
5 is a controller that compares the signal input from 5 to perform differential / integral calculation and sends a motor drive signal to the conversion unit 55, and is arranged remotely from the automatic setting pressure reducing valve and the pressure sensor 54. 57 and 58 are electric signal lines. The conversion unit 55 includes a power source 59, a sensor input circuit 60, a CPU 61, a communication circuit 62.
And the sensor input circuit 60 has an amplifier A / D
It has a converter and converts the pressure signal from the pressure sensor 54 into a digital signal. The controller 56 includes a power source 63 and a communication circuit 6
4, a CPU 65, a setting input circuit 66, and a display circuit 67. The CPU 65 stores the relationship between the position of the adjusting screw 19 and the set pressure in advance.
【0011】設定すべき任意の設定圧力目標値が68か
ら設定入力回路66に入力されると、CPU65は変換
部55を介して入力される圧力センサ54からの圧力信
号と比較し予め記憶した関係に基づいて微分・積分演算
を行い、変換部55にモ―タ駆動信号を送信する。これ
により駆動部52の電動機26が駆動され、調整部51
の調節ねじ19が進退せしめられて圧力設定ばね16の
弾性力が調節される。駆動部52のポテンショ・メ―タ
36により調節ねじ19が停止すべき位置に変位したこ
とが検出されると、電動機26の駆動が停止される。When an arbitrary set pressure target value to be set is input from 68 to the setting input circuit 66, the CPU 65 compares it with the pressure signal from the pressure sensor 54 input via the conversion unit 55 and stores it in advance in a stored relationship. The differential / integral calculation is performed based on the above, and the motor drive signal is transmitted to the conversion unit 55. As a result, the electric motor 26 of the drive unit 52 is driven, and the adjustment unit 51
The adjusting screw 19 is moved back and forth to adjust the elastic force of the pressure setting spring 16. When the potentiometer 36 of the drive unit 52 detects that the adjusting screw 19 is displaced to the position where it should be stopped, the drive of the electric motor 26 is stopped.
【0012】[0012]
【発明の効果】上記のように本発明によれば、配線コス
トを大幅に下げることができ、また高精度の遠隔操作式
自動制御弁を得ることができる。As described above, according to the present invention, the wiring cost can be greatly reduced, and a highly accurate remote control type automatic control valve can be obtained.
【図1】本発明の実施例の遠隔操作式自動制御弁のブロ
ック図である。FIG. 1 is a block diagram of a remote-controlled automatic control valve according to an embodiment of the present invention.
【図2】本発明の実施例に用いる自動設定減圧弁の断面
図である。FIG. 2 is a sectional view of an automatic setting pressure reducing valve used in an embodiment of the present invention.
【図3】従来の遠隔操作式自動制御弁のブロック図であ
る。FIG. 3 is a block diagram of a conventional remote-controlled automatic control valve.
50 減圧弁 51 調整部 52 駆動部 54 圧力センサ 55 変換部 56 調節計 57,58 電気信号線 66 設定入力回路 50 Pressure reducing valve 51 Adjustment unit 52 Drive unit 54 Pressure sensor 55 Conversion unit 56 Controller 57, 58 Electric signal line 66 Setting input circuit
Claims (1)
るセンサを配置し、センサからの信号が入力され設定目
標値と比較し偏差に基づいて自動制御弁の駆動部を制御
する調節計を自動制御弁及びセンサの遠隔に配置したも
のにおいて、自動制御弁の内部にセンサからの信号の変
換部を設け、変換部と調節計とを電気信号線で連結した
遠隔操作式自動制御弁。1. A controller for arranging a sensor for detecting a process amount in the vicinity of an automatic control valve, which receives a signal from the sensor, compares it with a set target value, and controls a drive section of the automatic control valve based on a deviation. A remote-controlled automatic control valve in which a converter for signals from the sensor is provided inside the automatic control valve and the sensor arranged remotely, and the converter and the controller are connected by an electric signal line.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4122666A JP3062640B2 (en) | 1992-04-15 | 1992-04-15 | Remote control type automatic control valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4122666A JP3062640B2 (en) | 1992-04-15 | 1992-04-15 | Remote control type automatic control valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05297958A true JPH05297958A (en) | 1993-11-12 |
JP3062640B2 JP3062640B2 (en) | 2000-07-12 |
Family
ID=14841635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4122666A Expired - Fee Related JP3062640B2 (en) | 1992-04-15 | 1992-04-15 | Remote control type automatic control valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3062640B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62229310A (en) * | 1986-03-28 | 1987-10-08 | Kubota Ltd | Control valve for water supply |
-
1992
- 1992-04-15 JP JP4122666A patent/JP3062640B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62229310A (en) * | 1986-03-28 | 1987-10-08 | Kubota Ltd | Control valve for water supply |
Also Published As
Publication number | Publication date |
---|---|
JP3062640B2 (en) | 2000-07-12 |
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