JPS61165109A - Fluid flow rate control device - Google Patents
Fluid flow rate control deviceInfo
- Publication number
- JPS61165109A JPS61165109A JP662285A JP662285A JPS61165109A JP S61165109 A JPS61165109 A JP S61165109A JP 662285 A JP662285 A JP 662285A JP 662285 A JP662285 A JP 662285A JP S61165109 A JPS61165109 A JP S61165109A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- signal
- flow
- fluid flow
- coefficient
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Flow Control (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は鉄鋼、化学プラン1〜等における各種のプロセ
ス或いは機器類の自動制御系に用いられる流体流量制御
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a fluid flow rate control device used in automatic control systems for various processes or equipment in steel, chemical plans, etc.
〈従来の技術〉
従来、流体の流量を自動制御する方法としては、流路に
配す電動ニードルバルブ或いはエアー作動バルブのオリ
フィスの流量係数を、外部制御信号により変化させる方
法か広く用いらている。この場合、電動ニードルバルブ
使用にあっては、バルブの回転軸を電動機により回転さ
せるため、11制御信号か人力されてから所要の流量係
数に到達するまでの応答速度が遅いという欠点を有刃る
。また、エアー作動バルブ使用にあっては、空気圧力の
変化でダイヤフラムを変位させることにより所要の流量
係数か得られるため、応答速度か速いが、その反面、空
気圧力を任意に変化させ1qるコンプレッ1ノーが不可
欠であり、流量制御装置全体が大型・複雑化するという
欠点かあった。勿論、これ等いずれの場合も、流量係数
の設定粘度を高めるためには、ホジシ臼ブーと呼ばれる
流量係数自体を検知覆るだめのレンリーを必要とするも
のである。<Prior art> Conventionally, a widely used method for automatically controlling the flow rate of fluid is to change the flow rate coefficient of the orifice of an electric needle valve or air-operated valve arranged in the flow path using an external control signal. . In this case, when using an electric needle valve, the valve's rotating shaft is rotated by an electric motor, so it has the disadvantage that the response speed from when the 11 control signal is input manually until the required flow coefficient is reached is slow. . In addition, when using an air-operated valve, the required flow coefficient can be obtained by displacing the diaphragm with changes in air pressure, so the response speed is fast. 1 NO is essential, which has the disadvantage that the entire flow control device becomes large and complicated. Of course, in any of these cases, in order to increase the set viscosity of the flow rate coefficient, a device called a hodgepodge that detects the flow rate coefficient itself is required.
〈発明か解決しようとする問題点〉
本発明は上記実情に鑑み、簡単な構成で、しかも応答速
度が速く、制御信号に対する流量係数設定精度の極めて
高い流体流量制御装置を捏供することを目的としたもの
である。<Problems to be Solved by the Invention> In view of the above-mentioned circumstances, the present invention aims to provide a fluid flow rate control device that has a simple configuration, has a fast response speed, and has extremely high flow rate coefficient setting accuracy for control signals. This is what I did.
〈問題点を解決するだめの手段〉
本発明の流体流量制御装置は、制御信号により別1立に
開閉しえるオリフィスを夫々有する複数個安電磁弁を、
流路の中途に並列接続し、該流路に配J流量セン1ノー
の信号と流mll設定同月り演算されるデジタル制御信
号を各電磁弁にうえる如くしたものである。<Means for Solving the Problems> The fluid flow rate control device of the present invention includes a plurality of solenoid valves each having an orifice that can be opened and closed independently according to a control signal.
The valves are connected in parallel in the middle of the flow path, and a digital control signal calculated in the same month as the J flow rate sensor 1 NO signal and the flow mll setting is sent to each solenoid valve in the flow path.
〈作 用〉
上記のような構成としてなるため、複数個のオリフィス
を並列に接続した流体流路の出入口間の流量係数は、個
々のオリフィスの開閉の組 、合せにJじて変えるこ
とができ、る。従って、応答速度が速く、しかも通電の
0N10FF動作となる2値信号による制御が可能な電
磁弁等を用いて個々のオリフィスを開閉しえるよう構成
すれば、個々のオリフィスに対重る2値信号の組合せを
変えることによって流量係数を変えることができる。即
ち、並列に配管接続したオリフィスの数がn個の場合、
nピッ1〜のデジタル信号を制御信号として流量係数を
ポジショナ−を用いることイヱく高il’l’1度で、
迅速に設定覆ることか1月11Lとなる。<Function> Because of the above configuration, the flow coefficient between the inlet and outlet of a fluid flow path in which multiple orifices are connected in parallel can be changed depending on the combination of opening and closing of the individual orifices. ,ru. Therefore, if each orifice is configured to open and close using a solenoid valve that has a fast response speed and can be controlled by a binary signal that performs 0N10FF operation, it is possible to open and close each orifice using a binary signal that overlaps each orifice. The flow coefficient can be changed by changing the combination of . That is, when the number of orifices connected in parallel with piping is n,
Using a positioner with a flow coefficient using a digital signal of n pi 1~ as a control signal, it is easy to use a positioner with a high il'l'1 degree.
If the setting is changed quickly, it will be 11L in January.
〈実施例〉
以下、本発明を実71h例の図面に基づいて説明りれば
、次の通りである。<Example> The present invention will be described below based on the drawings of an actual 71-hour example.
第1図は本発明による流体流量制御装置を用いた流体流
量のフィードバック定値制御装置を示す。流路Aの出入
ロa−a’間を流れる制御対象となる流体の流量は、該
流路Aに介在した流量セン1ノー1によって計測され、
この流量h11信号2か比較演算調節13に導かれるも
のとなる。この比較演算調節!+ 3で別途人力せる流
量設定信号4ど比゛較演算、処理される構成である。FIG. 1 shows a fluid flow rate feedback constant value control device using a fluid flow rate control device according to the present invention. The flow rate of the fluid to be controlled flowing between the inlet and outlet a-a' of the flow path A is measured by a flow rate sensor 1 no 1 interposed in the flow path A,
This flow rate h11 signal 2 is guided to the comparison calculation adjustment 13. This comparison calculation adjustment! + 3 is configured to perform comparison calculations and processing with the flow rate setting signal 4, which is manually input separately.
一方、この流量セン1ノー1の先方となる流路Aには夫
々適切4【流量係数をもつオリフィスを有する複数個の
電磁開閉弁6,7,8.9.10゜11.12.13を
並列接続し、これに前記比較演算調節h゛13より発づ
るデジタル制御信号5を導く構成とし、全体で流体流量
制御装置となる。On the other hand, a plurality of electromagnetic on-off valves 6, 7, 8, 9, 10, 11, 12, 13 each having an orifice with an appropriate flow rate coefficient of 4 is installed in the flow path A which is the destination of this flow rate sensor 1 no 1. They are connected in parallel and the digital control signal 5 generated from the comparison calculation adjustment h13 is guided thereto, and the whole constitutes a fluid flow rate control device.
即ち、この制御系は、流量センυ−1での流M開側信号
2と流M設定信号4が比較演算調節iL 3で比較演算
調節され、所要の流量を与える流暢係数を設定するため
の8ピツ1〜のデジタル制御信号5を発づるものである
(この場合、8ピツ1〜とは電磁開閉弁か図示にあって
8個配設してなるため)。このにうに比較演算調節it
3より送られたデジタル制御信号5を受ける電磁開閉
弁6,7,8.9,10; 11.12゜13は、この
ピッ1〜パターンに対応した流量係数に設定され、流路
Aのa−a’間を流れる流体流量を実質的に制御するも
のとなる。尚、この流体流量制御装置の主体となる電磁
開閉弁等は、単体のものを外部で並列に配管してもよい
し、マニホールドにて一体化し、内部で並列に配管を行
なってもよいものである。また、並列に接続する電磁開
閉弁の数は8個に限るものでない。That is, in this control system, the flow M open side signal 2 of the flow rate sensor υ-1 and the flow M setting signal 4 are comparatively adjusted by the comparison calculation adjustment iL 3, and the flow rate coefficient is set to give the required flow rate. It emits digital control signals 5 for 8 pins 1~ (in this case, 8 pins 1~ are electromagnetic on-off valves, as shown in the figure, and are eight in number). Comparison calculation adjustment it
The electromagnetic on-off valves 6, 7, 8, 9, 10; 11.12° 13, which receive the digital control signal 5 sent from 3, are set to flow coefficients corresponding to the patterns 1 to 13, and -a' substantially controls the fluid flow rate. The electromagnetic on-off valves, etc., which are the main components of this fluid flow control device, may be a single unit and piped in parallel externally, or they may be integrated in a manifold and piped internally in parallel. be. Further, the number of electromagnetic on-off valves connected in parallel is not limited to eight.
第2図は、一般のプロセス制御の代表例として液位定値
1」す御の例を示したものである。FIG. 2 shows an example of controlling a liquid level at a fixed value of 1'' as a typical example of general process control.
即ち、槽1Bの排液口14にり流出する流量の変動によ
る液面15の液位は、フロー1〜16により検λ■され
液位h−1測信月17となって比較演算調節1−13に
送られ、該比較演算調節計3で流量設定信号4と比較演
算調節され、デジタル制御信号5となって流体流量制御
部19に送られ、該流体流量制御部19の流路Aに並列
配設の電磁開閉弁20.21.・・・適宜制御し、櫓1
8に対する所要の)改位を与えるための流量を)qる。That is, the liquid level at the liquid level 15 due to the fluctuation of the flow rate flowing out from the drain port 14 of the tank 1B is detected by flows 1 to 16, and the liquid level h-1 becomes 17, and the comparison calculation adjustment 1 is performed. -13, is subjected to comparison calculation adjustment with the flow rate setting signal 4 by the comparison calculation controller 3, and is sent as a digital control signal 5 to the fluid flow rate control unit 19, and is sent to the flow path A of the fluid flow rate control unit 19. Parallel arrangement of electromagnetic on-off valves 20.21. ...Control as appropriate, turret 1
8).
勿論、この所定流量を実現するための流量係数は、フロ
ー1〜16の目標としている高さに応じ設定Jる。Of course, the flow rate coefficient for realizing this predetermined flow rate is set depending on the target height of flows 1 to 16.
而して、上記第1図、第2図において示した実施例にお
いて、並列に接続配管した電磁開閉弁等にJ:り独立に
開閉しえるオリフィスの個数をn個として、各々のオリ
フィスをVl、2゜・・・Vl、とした場合、Vlの流
量係数をSとして、V2.V3. ・、vnの流量係数
を23.4S。In the embodiments shown in FIGS. 1 and 2 above, the number of orifices that can be opened and closed independently is set to n, and each orifice is set to Vl. , 2°...Vl, the flow coefficient of Vl is S, and V2. V3.・The flow coefficient of vn is 23.4S.
・・・2n−13となるよう調節すると、オリフィスの
開閉を制御するnピッ1へのデジタル信号のビットパタ
ーンと全体の流量係数は1対1の関係とイアり、ピッ1
〜パターンが決まれば、全体の流量係数は−F=的に定
まる。例えば、第3図に示J如くオリフィスを8個並列
に接続配管したとき、8ピツ1〜の制御信号を最小値o
oooo。...2n-13, the bit pattern of the digital signal to n pin 1 that controls the opening and closing of the orifice and the overall flow rate coefficient have a one-to-one relationship, and pin 1
~ Once the pattern is determined, the overall flow coefficient is determined as -F=. For example, when 8 orifices are connected in parallel as shown in Fig. 3, the control signals of 8 pits 1 to 1 are set to the minimum value o.
ooooo.
00J、り最大値11111111まで変化させること
により、全体の流量係数は変化の最小単イvlをSとし
て、Oよりほぼ256Sの範囲にわたり、ε3ビットの
11制御信月のピッ1〜パターンの表ね1数値とほぼ正
比例関係を保ち連続的になめらかに変化さけることかで
きる。従って、制御イハ尼のピッ1〜パターンにより流
量係数が精度より一義的に決定されるため、ホジショリ
ーか不要となり、流体流量制御装置全体の114造か簡
略化されるものどなる。00J, by changing it up to the maximum value 11111111, the overall flow coefficient is over a range of approximately 256S from O, with the minimum single change vl being S, and the ε3 bit 11 control signal pitch 1 to pattern expression. It is possible to maintain a nearly direct proportional relationship with the 1 value and to avoid continuous and smooth changes. Therefore, since the flow rate coefficient is uniquely determined by the control pitch pattern rather than the accuracy, the controller is not required, and the overall structure of the fluid flow rate control device is simplified.
また、第1図及び第2図に表わされる実施例に示したご
とく、オリフィスの開閉に電磁開閉弁等を用いることに
より、1かめて速い応答速度をIIることか可能となる
。このことは、特に外乱の大きなプロセス制御系におけ
る制御精度向上にとって大きな利点となると共に、定値
制御のみならず追値制御への適応性も極めで大きい。Furthermore, as shown in the embodiments shown in FIGS. 1 and 2, by using an electromagnetic on-off valve or the like to open and close the orifice, it is possible to achieve an extremely fast response speed. This is a great advantage for improving control accuracy especially in a process control system with large disturbances, and is extremely adaptable not only to constant value control but also to additional value control.
更に、近年、信頼性の点から比較演算調節計はマイクロ
プロ廿ツ1ノを中心としたデジタルタイプのものか多く
、この場合にあっても本発明の流体流量制御1lII装
而は制御信号かデジタル信号として用いるため、インタ
ーフェイスが極めて容易である。Furthermore, in recent years, from the point of view of reliability, many comparative calculation controllers are of the digital type, mainly based on microprocessors, and even in this case, the fluid flow rate control system of the present invention uses control signals. Since it is used as a digital signal, the interface is extremely easy.
〈発明の効果〉
上述のように本発明の流体流量制御装置は、デジタル制
御信号を受εノる複数個の電磁開閉弁を流路に並列とし
たことにより、簡単な(IIx成で応答速度が速く、し
かも高精度な流体流量制御の実現を可能とした。更に、
デジタル機器とのインターフェイスかとり易く、信頼性
も高い。<Effects of the Invention> As described above, the fluid flow control device of the present invention has a simple (II has made it possible to realize fast and highly accurate fluid flow control.Furthermore,
Easy to interface with digital equipment and highly reliable.
これ等の活量、各種の流体流量制御を含むプロセス制御
システム或いは機器類の制御性能、信頼性を向上さ−1
、「1つ=1ス1〜を低廉化させる効果を奏Jるもので
ある。Improve the control performance and reliability of process control systems and equipment, including these activities and various fluid flow rate controls-1
``It has the effect of reducing the cost of 1 item = 1 item.
図面は本発明の実施例を示すもので、第1図はフィード
バック定値制御となる流体流量制御の系統図、第2図は
液位定値制御の系統図、第3図は流量係数と8ピッ1〜
デジタル制御信号との関係を示タグラフである。
1・・・流量ゼンーリーく2・・・流量計測信号、3・
・・比較演算調節計、4・・・流量設定信号、5・・・
デジタル制御信号、6.7,8.9,10,11゜12
.13.20.21・・・電磁開閉弁、A・・・流路。
特許出願人 三洋電機株式会社
代 ]ij 人 尾 股 行 雄面
荒 木 友之助−〇 −
第1図
第2図
ス
第3図
000QOOO1ff 11++
1111ヤ+uPIE号のと′フトIでダ〜ン
昭和60年3月15日
昭和60年特許願牙66z2 号
2、発明の名称
流係汽璽轡1[有]装置
3、補正をする者
事件との関係 特許出願人
住所(居所) 大阪府守口市京阪;jテ通2丁目12番
地氏名(名称)(18δ)三洋゛屯1帆i;::jq会
土4、代理人〒104
住 所 東京都中央区銀座8丁目12番15号全
国燃料会館709号室
氏 名 (6704) 弁理土足 股 折離(
はが1名)電話東京03(543)0036番(代表)
6、補正の内容
(1)明細部第7頁第13行l」の「ポジショナ−」と
あるのを、「ポジジョブ−」と補正しまづ。
(2)同第8頁第6〜・71−1目の「デジタル信号と
して用いるため」を、Wデジタル信号であるため」と補
正しにす。
以上The drawings show an embodiment of the present invention. FIG. 1 is a system diagram of fluid flow rate control that is feedback constant value control, FIG. 2 is a system diagram of liquid level constant value control, and FIG. ~
This is a graph showing the relationship with digital control signals. 1...Flow rate measurement signal 2...Flow rate measurement signal, 3.
...Comparison calculation controller, 4...Flow rate setting signal, 5...
Digital control signal, 6.7, 8.9, 10, 11°12
.. 13.20.21...Solenoid on-off valve, A...Flow path. Patent Applicant Sanyo Electric Co., Ltd.] ij Omata Yumen Araki Tomonosuke -〇 - Figure 1 Figure 2 Figure 3 000QOOO1ff 11++
No. 1111 + UPIE No. 1, Fut I, March 15, 1985, 1985 Patent Application No. 66z2 No. 2, Invention Name Flow Section 1 [Owner] Device 3, Person Making Amendment Case Relationship with Patent Applicant Address (Residence) Keihan, Moriguchi City, Osaka Prefecture; J Te-dori 2-12 Name (18δ) Sanyo ゛tun 1hoi;::jq Kaito 4; Agent 〒104 Address Room 709, National Fuel Center, 8-12-15, Ginza, Chuo-ku, Tokyo Name (6704) Patent attorney's shoes, legs broken (
1 person) Phone: Tokyo 03 (543) 0036 (main)
6. Contents of correction (1) In the description section, page 7, line 13, 1, the word ``positioner'' has been corrected to ``positive job.'' (2) The phrase ``to be used as a digital signal'' in pages 6 to 71-1 of page 8 has been corrected to read ``because it is a W digital signal''. that's all
Claims (1)
個のオリフィスを並列に配管接続すると共に、該流路の
流体出入口間の流量係数が各々のオリフィスの開閉の組
合せと1対1の関係となるよう調節することを特徴とし
た流体流量制御装置。1. A plurality of orifices that can be opened independently by electromagnetic valves are connected in parallel in the middle of the flow path, and the flow coefficient between the fluid inlet and outlet of the flow path is 1:1 with the combination of opening and closing of each orifice. A fluid flow rate control device characterized by adjusting the relationship such that:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP662285A JPS61165109A (en) | 1985-01-17 | 1985-01-17 | Fluid flow rate control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP662285A JPS61165109A (en) | 1985-01-17 | 1985-01-17 | Fluid flow rate control device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61165109A true JPS61165109A (en) | 1986-07-25 |
Family
ID=11643456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP662285A Pending JPS61165109A (en) | 1985-01-17 | 1985-01-17 | Fluid flow rate control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61165109A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0420599A2 (en) * | 1989-09-29 | 1991-04-03 | Ortech Corporation | Flow control system |
-
1985
- 1985-01-17 JP JP662285A patent/JPS61165109A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0420599A2 (en) * | 1989-09-29 | 1991-04-03 | Ortech Corporation | Flow control system |
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