JPH0254468B2 - - Google Patents
Info
- Publication number
- JPH0254468B2 JPH0254468B2 JP1665084A JP1665084A JPH0254468B2 JP H0254468 B2 JPH0254468 B2 JP H0254468B2 JP 1665084 A JP1665084 A JP 1665084A JP 1665084 A JP1665084 A JP 1665084A JP H0254468 B2 JPH0254468 B2 JP H0254468B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- control
- opening
- signal
- flow rate
- 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
- 238000000034 method Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005192 partition Methods 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Description
【発明の詳細な説明】
本発明は調節弁などの微少開度における弁の制
御方法に関するもである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of controlling a valve such as a control valve at a minute opening.
従来、調節弁を微少開度まで使用する必要があ
る場合においては小レンジ用のいわゆる子弁を設
け親子弁方式をとつてきた。これは通常弁の開度
の比較的大きい範囲においては流量の調節は比較
的に簡単で、流体はほぼ弁の間度の面積に比例し
て流れるが弁が徐々に絞られてくると弁の仕切面
の形状や弁体の端面の形状即ちエツヂ効果などに
より必ずしも弁の流通面積に比例したように流体
が流れず、不規則な流れをしめし、従つて弁の微
少開度範囲においては正確な流量を調節すること
は困難とされ、この微少開度調節の問題点を解決
する一方法として親子弁方式をとり、この２箇の
弁を並列に設け流量の比較的大きい調節範囲にお
いては親弁にて調節をおこない、微少開度範囲に
おいては親弁を締切り、子弁にて流量調節をおこ
なうという方法がとられていた。 Conventionally, when it is necessary to use a control valve to a minute opening degree, a so-called child valve for small ranges has been provided and a parent-child valve system has been adopted. Normally, it is relatively easy to adjust the flow rate within a relatively large range of valve opening, and the fluid flows approximately in proportion to the area between the valves. Due to the shape of the partition surface and the shape of the end face of the valve body, ie edge effect, etc., the fluid does not necessarily flow in proportion to the flow area of the valve, but shows an irregular flow. It is said that it is difficult to adjust the flow rate, and one way to solve this problem of minute opening adjustment is to use a parent-child valve system, in which these two valves are installed in parallel, and in a relatively large flow rate adjustment range, the parent valve is used. In the small opening range, the master valve is closed and the slave valve is used to adjust the flow rate.
本発明は上記の弁の微少開度範囲における弁の
調節の問題点を解決するためにおこなわれたもの
であり、微少調節範囲において子弁を用いること
なく調節弁である親弁のみを用い、その微少開度
における開度制御、即ちある開度以下において弁
体を間歇かつ連続的に発するパルス幅のON−
OFF制御いて開閉することによりそのパルス幅
により微少弁開度の弁体の開閉時間を制御し、流
体の時間当りの平均流量を調整することにより調
節弁の微少調節範囲における制御特性の向上を図
つた調節弁の制御方法を提供するものである。 The present invention was made in order to solve the problem of adjusting the valve in the minute opening range of the valve, and uses only the master valve, which is the control valve, without using the child valve in the minute adjustment range. Opening control at minute openings, that is, ON- pulse width that intermittently and continuously fires the valve body below a certain opening degree.
By opening and closing with OFF control, the opening and closing time of the valve body at minute valve opening is controlled by the pulse width, and the average flow rate of fluid per hour is adjusted to improve the control characteristics in the minute adjustment range of the control valve. A method for controlling an ivy control valve is provided.
ここでこの制御方法を実施例について説明する
と、第１図は本制御方法を実施する調節弁の制御
係統図であり１はセンサ受信器であり制御対象の
検知器（図示なし）にて検知された例えば温度、
液位、流体の流量などの制御対象状態量を演算可
能な信号に変換する。この信号は２の調節計に送
られ、与えられた制御目標値（図示Ｓ印）と比
較、調節演算されて、その出力は調節弁開度信号
として次の信号切替器３へ送出される。調節計２
はここで弁開度指示信号を送出するがこの場合、
調節弁７がその弁特有の定められた開度、即ちこ
の調節弁７が位置形にて弁体が開閉され流量が制
御される領域と微少調節範囲にてパルス幅にて開
閉制御される境界点以上の弁の開度が要求されて
いる場合には信号切替器３において調節計２の出
力信号が選択され、弁開度制御装置６により調節
弁７は所定の弁開度を維持するように制御されそ
の弁開度に相当する流体の流量が確保される。次
に調節計２の弁開度指令信号が弁の微少調節範囲
に入つた場合にはモニタスイツチ５が作動し、調
節弁７への弁開度指令信号はアナログ／パルス幅
の変換器４の出力側に切換えられる。この変換器
４においては弁開度信号によりその値に比例した
幅を有するパルス信号に変換され、このパルス信
号が連続的に発信される。即ち一定時間のパルス
信号の積分値は弁開度信号の値に比例した値とな
る。この連続したパルス信号は信号切替器３を径
由して調節弁７に送られ、調節弁７の弁体は弁開
度制御装置６によりパルス信号の幅に相当した開
閉動作を連続して繰返す。この場合に弁体は前記
の微少調節範囲の最大開度の位置と全閉の位置を
往復することになり、従つて弁体を径由する流体
の一定時間内の流量はパルス幅、即ち弁開度信号
の値に比例した流量が確保される。 To explain this control method using an example, Fig. 1 is a control system diagram of a control valve that implements this control method. For example, temperature,
Converts controlled state variables such as liquid level and fluid flow rate into signals that can be calculated. This signal is sent to the controller 2, where it is compared with a given control target value (marked S in the figure), adjusted and calculated, and its output is sent to the next signal switch 3 as a control valve opening signal. Controller 2
Here, the valve opening instruction signal is sent, but in this case,
The control valve 7 has a defined opening degree unique to the valve, that is, the boundary where the valve body is opened and closed depending on the position and the flow rate is controlled, and the range where the control valve 7 is controlled to open and close with the pulse width in the minute adjustment range. If the valve opening is required to be greater than or equal to the specified valve opening, the signal switch 3 selects the output signal of the controller 2, and the valve opening control device 6 causes the control valve 7 to maintain a predetermined valve opening. The flow rate of fluid corresponding to the valve opening degree is ensured. Next, when the valve opening command signal from the controller 2 falls within the valve minute adjustment range, the monitor switch 5 is activated, and the valve opening command signal to the control valve 7 is transmitted to the analog/pulse width converter 4. Switched to output side. In this converter 4, the valve opening degree signal is converted into a pulse signal having a width proportional to the value thereof, and this pulse signal is continuously transmitted. That is, the integral value of the pulse signal over a certain period of time becomes a value proportional to the value of the valve opening degree signal. This continuous pulse signal is sent to the control valve 7 via the signal switch 3, and the valve body of the control valve 7 continuously repeats opening and closing operations corresponding to the width of the pulse signal by the valve opening control device 6. . In this case, the valve body will reciprocate between the maximum opening position and the fully closed position in the minute adjustment range, and therefore the flow rate of the fluid passing through the valve body within a certain period of time is the pulse width, that is, the valve body. A flow rate proportional to the value of the opening signal is ensured.
第２図は上記の弁開度信号と弁体の位置形制御
御域ならびにパルス幅による制御域ならびにその
制御出力、即ち調節弁７を流通する流体量の関係
をしめしたものであり、このパルス幅による制御
域である調節弁の微少調節範囲は弁のMIN CV
値により定められる。 FIG. 2 shows the relationship between the above-mentioned valve opening signal, the valve body position control range, the control range based on the pulse width, and the control output, that is, the amount of fluid flowing through the control valve 7. The fine adjustment range of the control valve, which is the control range based on the width, is the MIN CV of the valve.
Determined by value.
第３図は弁開度信号と調節弁７と開閉制御する
制御信号モードの関係をあらわしたものであり、
調節弁７の位置形制御域において弁開度信号の値
に比例した制御信号が調節弁７に送られアナロ
グ／パルス切換作動点以下のパルス幅による制御
域においては弁開度信号に比例した幅を有するパ
ルスが連続的に送られ、従つて調節弁７はその微
少調節範囲においても弁開度信号に応じた正確な
時間平均流量を確保することができることをあら
わしている。 FIG. 3 shows the relationship between the valve opening signal, the control valve 7, and the control signal mode for controlling opening and closing.
In the position type control region of the control valve 7, a control signal proportional to the value of the valve opening signal is sent to the control valve 7, and in the control region with a pulse width below the analog/pulse switching operating point, a control signal proportional to the value of the valve opening signal is sent to the control valve 7. This indicates that the control valve 7 can ensure an accurate time-average flow rate in accordance with the valve opening signal even in its minute adjustment range.
以上説明した如く本発明による調節弁の制御方
法は、従来親子弁方式により流量の微細調節をお
こなつていたものを１個の弁にて全閉に相当する
位置より全界位置まで弁の全開度範囲にわたり正
確に流量調節を可能とすることができるものであ
る。 As explained above, the method of controlling a control valve according to the present invention changes the conventional method of finely adjusting the flow rate using a parent-child valve system, by changing the valve from a fully closed position to a fully open position using a single valve. It is possible to accurately adjust the flow rate over a range of degrees.
第１図は本発明の制御方法の実施を説明する調
節弁の制御系統図、第２図は弁開度信号と制御出
力の関係図、第３図は弁開度信号と制御信号モー
ドの関係図。
１……センサ受信器、２……調節計、３……信
号切替器、４……アナログ／パルス幅変換器、５
……モニタスイツチ、６……弁開度制御装置、７
……調節弁。
Fig. 1 is a control system diagram of a control valve explaining the implementation of the control method of the present invention, Fig. 2 is a relation diagram between the valve opening signal and control output, and Fig. 3 is a relation between the valve opening signal and control signal mode. figure. 1...Sensor receiver, 2...Controller, 3...Signal switcher, 4...Analog/pulse width converter, 5
...Monitor switch, 6...Valve opening control device, 7
……Control valve.
Claims (1)
い開度範囲においては弁体の開度による弁体位置
形制御により流量調整をおこない、弁体の微少開
度範囲においては弁体を連続的に開閉し、その開
時間と閉時間の比率を変化させることにより流量
調整をおこなうことを特徴とする調節弁の制御方
法。1 In a flow rate control valve, the flow rate is adjusted by controlling the position of the valve body based on the opening degree of the valve body in the large opening range of the valve body, and the flow rate is adjusted continuously in the small opening range of the valve body. A control method for a control valve, characterized in that the flow rate is adjusted by opening and closing the control valve and changing the ratio between the open time and the closed time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1665084A JPS60164081A (en) | 1984-02-01 | 1984-02-01 | Control method of regulation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1665084A JPS60164081A (en) | 1984-02-01 | 1984-02-01 | Control method of regulation valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60164081A JPS60164081A (en) | 1985-08-27 |
| JPH0254468B2 true JPH0254468B2 (en) | 1990-11-21 |
Family
ID=11922220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1665084A Granted JPS60164081A (en) | 1984-02-01 | 1984-02-01 | Control method of regulation valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60164081A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0716593B2 (en) * | 1989-07-14 | 1995-03-01 | 鐘紡株式会社 | Preparation method |
| JP2513541B2 (en) * | 1991-06-27 | 1996-07-03 | 大岡技研株式会社 | Work positioning method |
| EP2044353B1 (en) | 2006-07-25 | 2011-01-26 | BorgWarner, Inc. | Control algorithm for a device |
| CN110836289B (en) * | 2018-08-17 | 2022-03-15 | 联合汽车电子有限公司 | Control system and method for electromagnetic valve |
-
1984
- 1984-02-01 JP JP1665084A patent/JPS60164081A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60164081A (en) | 1985-08-27 |
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