JPH0155709B2 - - Google Patents
Info
- Publication number
- JPH0155709B2 JPH0155709B2 JP16174382A JP16174382A JPH0155709B2 JP H0155709 B2 JPH0155709 B2 JP H0155709B2 JP 16174382 A JP16174382 A JP 16174382A JP 16174382 A JP16174382 A JP 16174382A JP H0155709 B2 JPH0155709 B2 JP H0155709B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- positioner
- control system
- sub
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000005856 abnormality Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
- Servomotors (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Description
【発明の詳細な説明】
この発明は例えばプラントの給水調整に利用さ
れる流量制御弁の弁開度制御を行なう流量制御弁
制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flow rate control valve control device that controls the opening degree of a flow rate control valve used for adjusting water supply in a plant, for example.
プラントでは各種用途に流量制御弁が利用され
ており、プラントの信頼性はこれら制御弁の確実
な動作に依存するところが大きい。このため、重
要な制御弁には主制御系をバツクアツプする副制
御系を設けるような安全対策がなされる。そし
て、開度計により制御弁の弁開度を監視し、主制
御系が故障した場合、すみやかに副制御系へ切り
替えるようにする。 Flow control valves are used in plants for various purposes, and the reliability of the plant largely depends on the reliable operation of these control valves. For this reason, safety measures are taken to provide important control valves with sub-control systems that back up the main control system. The opening degree of the control valve is monitored using an opening meter, and if the main control system malfunctions, the control system is immediately switched to the sub-control system.
第１図はその例を示したもので、例えば制御室
での操作に対応して発生させた電気的弁開度指令
信号は、流量制御弁１１に対応してその近傍に設
けた電気空気変換器１２に供給される。この電気
空気変換器１２は指令信号に対応する空気圧の弁
駆動用空気を発生するもので、主ポジシヨナ１３
および副ポジシヨナ１４に並例的に供給される。
この空気は各ポジシヨナ１３，１４に備えられた
パイロツト弁により流量制御弁１１の弁開度に対
応して機械的に圧力調整され、それぞれ切換器１
５に供給される。この切換器１５は切替スイツチ
１６に連動して、主あるいは副ポジシヨナ１３，
１４からの弁駆動用空気を選択的にブースタリレ
ー１７に供給し、このブースタリレー１７で空気
容量を増加して流量制御弁１１に加える。この場
合、切替スイツチ１６は通常的に主ポジシヨナ１
３を選択する。主ポジシヨナ１３または副ポジシ
ヨナ１４により制御された流量制御弁１１の弁開
度は機械的に各ポジシヨナ１３，１４に帰還され
ると共に、電気信号として開度計１８を駆動して
弁開度表示させる。 FIG. 1 shows an example of this. For example, an electric valve opening command signal generated in response to an operation in the control room is transmitted to an electric air converter installed near the flow control valve 11. is supplied to the container 12. This electric air converter 12 generates pneumatic valve driving air corresponding to a command signal, and the main positioner 13
and the secondary positioner 14 in parallel.
The pressure of this air is mechanically adjusted by a pilot valve provided in each positioner 13, 14 according to the valve opening degree of the flow control valve 11, and the pressure is adjusted by a pilot valve provided in each positioner 13, 14.
5. This changeover 15 is linked to a changeover switch 16, and the main or sub positioner 13,
The valve driving air from 14 is selectively supplied to a booster relay 17, which increases the air capacity and applies it to the flow rate control valve 11. In this case, the changeover switch 16 is normally used for the main positioner 1.
Select 3. The valve opening of the flow control valve 11 controlled by the main positioner 13 or the sub-positioner 14 is mechanically fed back to each positioner 13, 14, and is also used as an electric signal to drive the opening meter 18 to display the valve opening. .
ここで、この開度計１８の弁開度表示に対応す
る弁開度信号は加算器１９に供給され、この加算
器１９において前記弁開度指令信号と比較してそ
の偏差が得られるようにする。この偏差値はバイ
ステーブル２０に供給され、偏差に異常があると
きには、バイステーブル２０から限時リレー２１
を介して警報器２２に報知指示を与えるようにし
てなる。 Here, the valve opening signal corresponding to the valve opening display of the opening meter 18 is supplied to an adder 19, and the adder 19 compares it with the valve opening command signal to obtain the deviation. do. This deviation value is supplied to the bistable 20, and when there is an abnormality in the deviation, the bistable 20 sends the time-limiting relay 21 to the bistable 20.
A notification instruction is given to the alarm device 22 via.
上記のような装置において、主ポジシヨナ１３
および副ポジシヨナ１４は共に機械的な動作をす
るパイロツト弁により構成されており、このパイ
ロツト弁は摩耗やステイツクを発生して故障する
ことがある。主ポジシヨナ１３が故障状態となつ
た場合には、切替スイツチ１６により副ポジシヨ
ナ１４に切替られる。ところが、各ポジシヨナ１
３，１４には常時空気が流れている構成であるた
めに、切り替え選択されたポジシヨナが故障して
いる可能性もある。したがつて、主ポジシヨナ１
３に障害が発生し、切換器１５で副ポジシヨナ１
４に切替えた場合に、この副ポジシヨナ１４に障
害の存在する恐れがあり、安全対策が充分といえ
ず、プラントの信頼性を低下させることになる。 In the above device, the main positioner 13
Both the sub-positioner 14 and the sub-positioner 14 are constituted by pilot valves that operate mechanically, and the pilot valves may fail due to wear or sticking. When the main positioner 13 is in a failure state, it is switched to the sub positioner 14 by the changeover switch 16. However, each positioner 1
Since air is constantly flowing through the positions 3 and 14, there is a possibility that the positioner selected for switching is malfunctioning. Therefore, main positioner 1
A failure occurs in positioner 3, and switch 15 switches the positioner to sub-positioner 1.
4, there is a possibility that a failure will occur in this sub-positioner 14, and safety measures will not be sufficient, which will reduce the reliability of the plant.
この発明は上記のような問題点を解決するため
になされたもので主制御系および副制御系が独立
して充分な冗長性を発揮し、弁開度制御不能な状
態に陥りにくい流量制御弁制御装置を提供するこ
とを目的とする。 This invention was made in order to solve the above-mentioned problems, and provides a flow control valve in which the main control system and the sub-control system independently exhibit sufficient redundancy, making it difficult for the valve opening to become uncontrollable. The purpose is to provide a control device.
この発明に係る流量制御弁制御装置は、機械式
ポジシヨナを含む弁駆動用空気の主制御系と、電
気式ポジシヨナを含む弁駆動用空気の副制御系と
を備え、この主制御系と副制御系とを切替選択し
て空気作動式ダイヤフラム弁を制御するようにし
たことを特徴としたものである。 A flow control valve control device according to the present invention includes a main control system for valve driving air including a mechanical positioner, and a sub-control system for valve driving air including an electric positioner, and the main control system and sub-control This feature is characterized in that the air-operated diaphragm valve is controlled by switching between the two systems.
以下図面を参照してこの発明の一実施例を説明
する。第２図はその構成を示したもので、図示さ
れない制御室での操作に対応して発生させた電気
的弁開度指令信号は、流量制御弁１１に対応して
その近傍に設けられた電気空気変換器２３に供給
する。この電気空気変換器２３は弁開度指令信号
に対応した空気圧の弁駆動用空気を発生し、この
空気を機械式ポジシヨナ２４に供給する。このポ
ジシヨナ２４は通常スプール弁からなる機械的な
パイロツト弁を備え、このパイロツト弁で弁駆動
用空気を空気作動式ダイヤフラム弁でなる流量制
御弁１１の弁開度に対応してさらに圧力調整す
る。このポジシヨナ２４で制御された弁駆動用空
気は、ブースタリレー２５を介して空気容量を増
加させ、電磁弁２６に供給する。この電磁弁２６
は上記のような主制御系および後述する副制御系
から供給される弁駆動用空気を、切替スイツチ２
７に連動して選択的に流量制御弁１１に加える。
この流量制御弁１１の弁開度はバランスビームを
もつリンク機構等により機械的に前述したような
ポジシヨナ２４に帰還させて、パイロツト弁が連
動するようにする。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows its configuration, and an electrical valve opening command signal generated in response to an operation in a control room (not shown) is transmitted to an electrical valve provided near the flow control valve 11 corresponding to the flow control valve 11. Supplied to air converter 23. This electric air converter 23 generates air for driving the valve at a pneumatic pressure corresponding to the valve opening command signal, and supplies this air to the mechanical positioner 24 . This positioner 24 is equipped with a mechanical pilot valve, usually a spool valve, which further adjusts the pressure of the valve driving air in accordance with the valve opening of the flow control valve 11, which is an air-operated diaphragm valve. The valve driving air controlled by the positioner 24 increases the air capacity via the booster relay 25 and is supplied to the solenoid valve 26. This solenoid valve 26
The valve driving air supplied from the main control system as described above and the sub-control system described later is switched to the changeover switch 2.
7 and selectively added to the flow rate control valve 11.
The valve opening degree of the flow rate control valve 11 is mechanically returned to the positioner 24 as described above by a link mechanism having a balance beam, etc., so that the pilot valve is interlocked.
また、流量制御弁１１の弁開度は電気信号とし
て開度計に供給して弁開度表示させ、さらに、そ
の信号を弁開度帰還信号として加算器２９に供給
する。この加算器２９はこの弁開度帰還信号と前
記弁開度指令信号を比較し、その結果である偏差
信号をPID制御器３０に供給する。このPID制御
器３０はその偏差に対して比例積分微分演算を行
ない弁制御信号を発生させるもので、積分演算は
切替スイツチ２７により副制御系が選択された際
に行なわれる。そして、この弁制御信号は電気空
気変換器３１に供給して、その信号に対応する空
気圧の弁駆動用空気を発生させる。 Further, the valve opening degree of the flow control valve 11 is supplied as an electric signal to the opening meter to display the valve opening degree, and further, the signal is supplied to the adder 29 as a valve opening degree feedback signal. The adder 29 compares the valve opening degree feedback signal with the valve opening command signal and supplies the resultant deviation signal to the PID controller 30. The PID controller 30 performs a proportional-integral-differential calculation on the deviation to generate a valve control signal, and the integral calculation is performed when the sub-control system is selected by the changeover switch 27. This valve control signal is then supplied to the electro-pneumatic converter 31 to generate valve driving air at a pneumatic pressure corresponding to the signal.
この弁駆動用空気は、ブースタリレー３２を介
して空気容量を増加させ、電磁弁２６に供給する
ようにして副制御系を構成する。このような副制
御系において、加算器２９およびPID制御器３０
は電気式ポジシヨナを構成しており、主制御系の
機械式ポジシヨナ２４を独立してバツクアツプす
る。また、加算器２９の偏差信号はバイステーブ
ル２０に供給する。このバイステーブル２０は、
偏差が弁開度制御異常と判断される場合に、限時
リレー２１を介して警報器２２に報知指示を与え
るようにする。 This valve driving air increases the air capacity through the booster relay 32 and supplies it to the electromagnetic valve 26, forming a sub-control system. In such a sub-control system, the adder 29 and the PID controller 30
constitutes an electric positioner, and independently backs up the mechanical positioner 24 of the main control system. Further, the deviation signal from the adder 29 is supplied to the bistable 20. This vice table 20 is
When the deviation is determined to be an abnormality in valve opening control, an alarm instruction is given to an alarm 22 via a time limit relay 21.
上記のような流量制御弁制御装置においては、
通常切替スイツチ２７は主制御系を選択してお
り、弁開度指令操作によつて電気空気変換器２３
を制御する。そして、主制御系が故障している場
合には、開度計２８だけでなく、警報器２２によ
つても異常が報知される。 In the flow control valve control device as described above,
Normally, the selector switch 27 selects the main control system, and the electric air converter 23 is controlled by the valve opening command operation.
control. If the main control system is out of order, not only the opening gauge 28 but also the alarm 22 will notify you of the abnormality.
このような異常発生の状態で、切替スイツチ２
７は副制御系を切り替え選択するもので、流量制
御弁１１は機械的弁開度帰還制御から電気的弁開
度帰還制御へと移行する。 When such an abnormality occurs, selector switch 2
7 is for switching and selecting the sub-control system, and the flow rate control valve 11 shifts from mechanical valve opening feedback control to electrical valve opening feedback control.
すなわち、主制御系で機械的パイロツト弁が摩
耗やステツクを発生して故障した場合でも、その
故障原因は何ら副制御系に影響しないので、副制
御系は確実にバツクアツプすることになる。 That is, even if the mechanical pilot valve fails in the main control system due to wear or sticking, the cause of the failure does not affect the sub-control system in any way, so the sub-control system will definitely be backed up.
尚、この実施例においては、主制御系に機械式
ポジシヨナ、副制御系に電気式ポジシヨナを使用
しているが、主制御系に電気式ポジシヨナを使用
してもよい。そして、機械式ポジシヨナでは固有
の利得特性しか得られないが、電気式ポジシヨナ
であれば、PID制御器の定数を変化させることで
任意の利得特性を設定することができる。 In this embodiment, a mechanical positioner is used for the main control system and an electric positioner is used for the sub control system, but an electric positioner may be used for the main control system. While a mechanical positioner can only provide a specific gain characteristic, an electrical positioner allows arbitrary gain characteristics to be set by changing the constants of the PID controller.
また、切替スイツチ２７を警報ラインに連動さ
せれば、異常発生時の制御系切替を自動化でき
る。 Further, by linking the changeover switch 27 with the alarm line, switching of the control system when an abnormality occurs can be automated.
すなわち、この発明に係る流量制御弁制御装置
によれば機械的ポジシヨナを含む弁駆動用空気の
副制御系とを備え、この主制御系と副制御系とを
切替選択して空気作動式ダイヤフラム弁を制御す
るようにしたことを特徴とすることで、主制御系
の故障時に副制御系で確実に流量制御弁の弁開度
を制御することができ、プラントの信頼性を向上
することになる。 That is, the flow rate control valve control device according to the present invention includes a sub-control system for valve driving air including a mechanical positioner, and switches and selects between the main control system and the sub-control system to control the air-operated diaphragm valve. By controlling the valve opening of the flow control valve in the event of a failure of the main control system, the sub-control system can reliably control the opening of the flow control valve, improving the reliability of the plant. .
第１図は従来の流量制御弁制御装置の構成を示
す図、第２図はこの発明の一実施例に係る流量制
御弁制御装置の構成図である。
１１……流量制御弁（空気式ダイヤフラム弁）、
２３，３１……電気空気変換器、２４……機械式
ポジシヨナ、２５，３２……ブースタリレー、２
６……電磁弁、２７……切替スイツチ、２８……
開度計、２９……加算器、３０……PID制御器。
FIG. 1 is a diagram showing the configuration of a conventional flow rate control valve control device, and FIG. 2 is a configuration diagram of a flow rate control valve control device according to an embodiment of the present invention. 11...Flow control valve (pneumatic diaphragm valve),
23, 31... Electric air converter, 24... Mechanical positioner, 25, 32... Booster relay, 2
6... Solenoid valve, 27... Selector switch, 28...
Opening degree meter, 29... Adder, 30... PID controller.
Claims (1)
御系と、電気式ポジシヨナを含む弁駆動用空気の
副制御系とを備え、この主制御系と副制御系とを
切替選択して空気作動式ダイヤフラム弁を制御す
るようにしたことを特徴とする流量制御弁制御装
置。1 Equipped with a main control system for the valve drive air including a mechanical positioner and a sub control system for the valve drive air including an electric positioner, the main control system and the sub control system can be switched and selected to control the air operated type. A flow control valve control device characterized by controlling a diaphragm valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16174382A JPS5950282A (en) | 1982-09-17 | 1982-09-17 | Apparatus for controlling flow control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16174382A JPS5950282A (en) | 1982-09-17 | 1982-09-17 | Apparatus for controlling flow control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5950282A JPS5950282A (en) | 1984-03-23 |
| JPH0155709B2 true JPH0155709B2 (en) | 1989-11-27 |
Family
ID=15741035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16174382A Granted JPS5950282A (en) | 1982-09-17 | 1982-09-17 | Apparatus for controlling flow control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5950282A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2551839Y2 (en) * | 1992-01-09 | 1997-10-27 | 株式会社ミワックス | Painting panel with calendar function |
| JPH0556465U (en) * | 1992-01-09 | 1993-07-27 | 美和ゴム工業株式会社 | Painting panel with calendar function |
| CN104132175A (en) * | 2011-12-31 | 2014-11-05 | 陈光焕 | Valve flow automatic-control adjuster |
| CN102968132A (en) * | 2012-11-28 | 2013-03-13 | 重庆赛联自动化工程技术有限公司 | High-precision large-flow gas control method for bottom blowing system of revolving furnace |
| CN106949292B (en) * | 2016-01-07 | 2019-09-17 | 中核控制系统工程有限公司 | A kind of pneumatic control valve no-harass switch control method |
-
1982
- 1982-09-17 JP JP16174382A patent/JPS5950282A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5950282A (en) | 1984-03-23 |
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