JPH0772934A - In-line mixing controller - Google Patents
In-line mixing controllerInfo
- Publication number
- JPH0772934A JPH0772934A JP18895391A JP18895391A JPH0772934A JP H0772934 A JPH0772934 A JP H0772934A JP 18895391 A JP18895391 A JP 18895391A JP 18895391 A JP18895391 A JP 18895391A JP H0772934 A JPH0772934 A JP H0772934A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- mixing
- control valve
- line
- level
- 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.)
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Links
Landscapes
- Feedback Control In General (AREA)
- Flow Control (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、安定した制御を可能に
したインライン混合制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-line mixing control device which enables stable control.
【０００２】[0002]
【従来の技術】従来より製品、原料、燃料等の各種液体
や粉体を混合して所定割合の混合物を得る装置として図
５に示すようなインライン混合制御装置が知られてい
る。2. Description of the Related Art Conventionally, an in-line mixing control device as shown in FIG. 5 has been known as a device for mixing various liquids or powders such as products, raw materials and fuels to obtain a mixture at a predetermined ratio.
【０００３】図に示すように、この従来装置は、並列接
続されたタンクＡ1 ，Ａ2 ，…，Ａn からなるタンク群
Ａと、並列接続されたタンクＢ1 ，Ｂ2 ，…，Ｂn から
なるタンク群Ｂと、並列接続されたタンクＣ1 ，Ｃ2 ，
…，Ｃn からなるタンク群Ｃとを備え、タンク群Ａの各
タンクには製品ａが、タンク群Ｂの各タンクには製品ｂ
が、タンク群Ｃの各タンクには製品ｃが貯蔵されてい
る。[0003] As shown, the conventional apparatus, the tank A 1, A 2 which are connected in parallel, ..., a tank group A consisting of A n, tank B 1 which are connected in parallel, B 2, ..., B a tank group B consisting of n and tanks C 1 , C 2 connected in parallel,
, C n , each tank of tank group A is product a, and each tank of tank group B is product b.
However, the product c is stored in each tank of the tank group C.
【０００４】各タンク群Ａ，Ｂ，Ｃは各群別に配設され
た混合ライン１０１Ａ，１０１Ｂ，１０１Ｃに接続され
ている。各混合ライン１０１Ａ，１０１Ｂ，１０１Ｃに
はそれぞれ流量計１０２Ａ，１０２Ｂ，１０２Ｃと、流
量調節弁１０３Ａ，１０３Ｂ，１０３Ｃとが配設されて
おり、それらの弁開度は各流量計１０２Ａ，１０２Ｂ，
１０２Ｃの計測値に応じて流量調節計（ＦＩＣ）１０４
Ａ，１０４Ｂ，１０４Ｃにより各別に制御されている。Each tank group A, B, C is connected to a mixing line 101A, 101B, 101C arranged for each group. Flowmeters 102A, 102B, 102C and flow rate control valves 103A, 103B, 103C are arranged on the mixing lines 101A, 101B, 101C, respectively, and the valve openings of the flowmeters 102A, 102B, 102B,
Flow controller (FIC) 104 according to the measured value of 102C
It is controlled separately by A, 104B and 104C.
【０００５】各混合ライン１０１Ａ，１０１Ｂ，１０１
Ｃは合流し、レベル調節弁１０５を介してバッファタン
ク１０６に接続されている。このバッファタンク１０６
の液位は、レベル計１０７により検出され、そのレベル
検出信号はレベル調節計１０８に供給されている。この
レベル調節計（ＬＩＣ）１０８は、液位を一定に保つた
めに、供給されたレベル検出信号からレベル調節弁１０
５の弁開度を計算してその弁開度信号を前記レベル調節
弁１０５と総流量設定器１０９に出力する。Each mixing line 101A, 101B, 101
C merges and is connected to the buffer tank 106 via the level control valve 105. This buffer tank 106
The liquid level of is detected by the level meter 107, and the level detection signal is supplied to the level controller 108. The level controller (LIC) 108 uses the level detection signal supplied to maintain the liquid level constant.
The valve opening of No. 5 is calculated and the valve opening signal is output to the level control valve 105 and the total flow rate setter 109.
【０００６】総流量設定器１０９は、レベル調節計１０
８から供給される弁開度信号から混合ラインの総流量を
演算する。その総流量演算値は混合ライン各別に設けら
れた比率器１１０Ａ，１１０Ｂ，１１０Ｃに供給され
る。各比率器１１０Ａ，１１０Ｂ，１１０Ｃには、あら
かじめ各製品の混合比率が設定されており、前記総流量
演算値に各比率を乗じ、流量設定値としてそれぞれ流量
調節計１０４Ａ，１０４Ｂ，１０４Ｃに出力する。各流
量調節計１０４Ａ，１０４Ｂ，１０４Ｃは、前述したよ
うにそれぞれ流量設定値と各流量計１０２Ａ，１０２
Ｂ，１０２Ｃの計測値との偏差が零となるように各流量
調節弁１０３Ａ，１０３Ｂ，１０３Ｃの弁開度を制御す
る。The total flow setting device 109 is a level controller 10.
The total flow rate of the mixing line is calculated from the valve opening signal supplied from 8. The total flow rate calculation value is supplied to the ratio devices 110A, 110B and 110C provided for each mixing line. The mixing ratio of each product is set in advance in each of the ratio devices 110A, 110B, and 110C, and the total flow rate calculation value is multiplied by each ratio and output to the flow rate controllers 104A, 104B, and 104C as flow rate setting values, respectively. . As described above, the flow rate controllers 104A, 104B, and 104C have flow rate setting values and flow rate meters 102A and 102C, respectively.
The valve openings of the flow rate control valves 103A, 103B, 103C are controlled so that the deviation from the measured values of B, 102C becomes zero.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上記従
来装置によれば、各タンク群Ａ，Ｂ，Ｃからバッファタ
ンク１０６に至る連続する流路上に流量調節弁１０３
Ａ，１０３Ｂ，１０３Ｃと、レベル調節弁１０５とが直
列に配設されているので、相互干渉を生じて制御が不安
定になるという不具合がある。すなわち、同一比率で同
一の総流量を得るためのレベル調節弁１０５と各流量調
節弁１０３Ａ，１０３Ｂ，１０３Ｃの開度の組合せは広
い範囲で存在する。例えば、製品ａ，ｂ，ｃの混合比率
を１：１．２：０．８として総流量８０％を得たい場合
には、表１に示すいずれの組合せでも良いこととなる。However, according to the above conventional device, the flow rate control valve 103 is provided on the continuous flow path from each tank group A, B, C to the buffer tank 106.
Since the A, 103B and 103C and the level control valve 105 are arranged in series, there is a problem that mutual interference occurs and control becomes unstable. That is, there are a wide range of combinations of the opening of the level control valve 105 and the flow control valves 103A, 103B, 103C for obtaining the same total flow rate at the same ratio. For example, when it is desired to obtain a total flow rate of 80% by setting the mixing ratio of the products a, b, and c to 1: 1.2: 0.8, any combination shown in Table 1 can be used.
【０００８】[0008]
【表１】 [Table 1]
【０００９】このことは、設定値が変化せず一定であっ
ても通常の制御動作においてケース１〜ケース３に示す
範囲で調節弁開度が不安定に移動してしまう。また、ケ
ース３に示すように、Ｂタンク群の調節弁開度が９６％
とほぼ全開に近いものも存在することとなり、制御の途
中で予期しない時期に制御範囲の限界となってしまうと
いう不具合があった。This means that even if the set value does not change and is constant, the control valve opening moves in an unstable manner in the range shown in Case 1 to Case 3 in the normal control operation. Further, as shown in Case 3, the control valve opening of the B tank group is 96%.
However, there is a problem that the range is almost fully opened, and the control range becomes the limit at an unexpected time during the control.
【００１０】さらに、タンクの組合せを変更する際、急
激な変更により比率制御の乱れが生じ、制御範囲の限界
付近まで調節弁を移動させてしまう要因となっている。Further, when the combination of tanks is changed, the ratio control is disturbed due to an abrupt change, which causes the control valve to move to the vicinity of the limit of the control range.
【００１１】本発明は、上記事情に鑑みてなされたもの
であり、その目的は、常に安定した比率制御を可能とす
るインライン混合制御装置を提供することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an in-line mixing control device capable of always performing stable ratio control.
【００１２】[0012]
【課題を解決するための手段】上記の目的を達成するた
めに本発明は、種類の異なる被混合物が貯蔵された複数
のタンクと、各タンクに接続された混合ラインにそれぞ
れ配設された流量調節弁と、前記混合ラインが合流する
ラインに配設されたレベル調節弁と、前記合流ラインを
介して混合された製品を貯蔵するバッファタンクと、前
記各流量制御弁およびレベル調節弁の開度を制御して前
記製品の混合比率を一定にするとともに前記バッファタ
ンクの液位を一定値に維持する制御部とを備えたインラ
イン混合制御装置において、前記制御部は、各混合比率
に基づいた各流量調節弁の開度により前記液位を維持す
る流量を決定する基準開度設定値を各流量調節弁毎に求
める基準開度設定値演算手段と、求められた各基準開度
設定値の上下限値を設定して前記各流量調節弁に供給さ
れる各基準開度設定値を制限する設定値制限手段とを具
備することを特徴とする。In order to achieve the above-mentioned object, the present invention provides a plurality of tanks for storing different kinds of materials to be mixed and a flow rate respectively arranged in a mixing line connected to each tank. A control valve, a level control valve arranged in a line where the mixing line joins, a buffer tank for storing the mixed product through the joining line, and opening degrees of the flow control valves and the level control valve. In the in-line mixing control device including a control unit for controlling the liquid content of the buffer tank to a constant value while controlling the mixing ratio of the product to be constant, the control unit controls each of the mixing ratios based on each mixing ratio. A reference opening set value calculating means for obtaining, for each flow control valve, a reference opening set value that determines the flow rate for maintaining the liquid level according to the opening of the flow rate adjustment valve, and a reference opening set value obtained above. lower limit Set to characterized by comprising a setting value limiting means for limiting the respective reference opening setting value to be supplied to the respective flow rate control valve.
【００１３】[0013]
【作用】上記の構成によれば、各ラインの流量調節弁と
レベル調節弁の作用を明確に分離し、総流量の制御をレ
ベル調節弁に受け持たせ、各流量調節弁は流量比率を制
御することによって前記液位レベルを維持するようにし
ている。これにより、各ラインの流量調節弁とレベル調
節弁の開度の組み合わせの自由度が制限され、相互干渉
に起因する制御の不安定が防止できる。According to the above structure, the functions of the flow rate control valve and the level control valve of each line are clearly separated, and the level control valve is responsible for controlling the total flow rate, and each flow rate control valve controls the flow rate ratio. By doing so, the liquid level is maintained. As a result, the degree of freedom in the combination of the openings of the flow rate control valve and the level control valve of each line is limited, and instability of control due to mutual interference can be prevented.
【００１４】[0014]
【実施例】図１は本発明に係るインライン混合切換制御
装置の一実施例を示す構成図であり、同図に示す装置
は、特に混合後の製品の均一性を重要視する液体混合物
の制御装置に関する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of an in-line mixing / switching control device according to the present invention. The device shown in FIG. 1 controls a liquid mixture in which importance is placed on the uniformity of products after mixing. Regarding the device.
【００１５】本実施例装置は、前記従来例と同様、それ
ぞれｎ個のタンクからなる３つのタンク群Ａ，Ｂ，Ｃを
備え、タンク群Ａの各タンクには製品ａが、タンク群Ｂ
の各タンクには製品ｂが、タンク群Ｃの各タンクには製
品ｃが貯蔵されている。タンク群Ａは並列接続されたタ
ンクＡ1 ，Ａ2 ，…，Ａn からなり、タンク群Ｂは並列
接続されたタンクＢ1 ，Ｂ2 ，…，Ｂn からなり、タン
ク群Ｃは並列接続されたタンクＣ1 ，Ｃ2 ，…，Ｃn か
らなっている。The apparatus of this embodiment is provided with three tank groups A, B, and C each consisting of n tanks, like the above-mentioned conventional example. In each tank of tank group A, product a and tank group B are provided.
The product b is stored in each tank and the product c is stored in each tank of the tank group C. Tank A 1, A 2 the tank group A which are connected in parallel, ... made A n, tank B 1, B 2 is tank group B connected in parallel, ..., consist B n, tank group C is connected in parallel been tank C 1, C 2, ..., are made of C n.
【００１６】各タンク群Ａ，Ｂ，Ｃは各群別に配設され
た混合ライン１Ａ，１Ｂ，１Ｃに接続されている。各混
合ライン１Ａ，１Ｂ，１Ｃにはそれぞれ流量計２Ａ，２
Ｂ，２Ｃと、流量調節弁３Ａ，３Ｂ，３Ｃとが配設され
ており、それらの弁開度は各流量計２Ａ，２Ｂ，２Ｃの
計測値に応じて流量調節計（ＦＩＣ）４Ａ，４Ｂ，４Ｃ
により制御されている。Each tank group A, B, C is connected to a mixing line 1A, 1B, 1C arranged for each group. Flowmeters 2A, 2 are provided in the mixing lines 1A, 1B, 1C, respectively.
B, 2C and flow rate control valves 3A, 3B, 3C are provided, and their valve openings are flow rate control units (FIC) 4A, 4B according to the measured values of the flow rate meters 2A, 2B, 2C. , 4C
Is controlled by.
【００１７】各混合ライン１Ａ，１Ｂ，１Ｃは合流し、
レベル調節弁５を介してバッファタンク６に接続されて
いる。このバッファタンク６は、製品ａ，ｂ，ｃが所定
割合で混合した製品を一時的に貯蔵し、後段の処理工程
に対して混合製品を安定供給するためのものである。こ
のバッファタンク６の液位は、レベル計７により検出さ
れ、そのレベル検出信号はレベル調節計８に供給されて
いる。このレベル調節計（ＬＩＣ）８は、レベル検出信
号から液位を一定に保つために、レベル調節弁５の弁開
度を計算してその弁開度信号を前記レベル調節弁５と総
流量設定器９に出力する。The respective mixing lines 1A, 1B, 1C merge,
It is connected to the buffer tank 6 via the level control valve 5. The buffer tank 6 is for temporarily storing a product in which the products a, b, and c are mixed at a predetermined ratio and stably supplying the mixed product to the subsequent processing step. The liquid level in the buffer tank 6 is detected by the level meter 7, and the level detection signal is supplied to the level controller 8. The level controller (LIC) 8 calculates the valve opening of the level adjusting valve 5 and maintains the liquid level from the level detection signal by setting the valve opening signal to the level adjusting valve 5 and the total flow rate setting. Output to the container 9.
【００１８】総流量設定器９は、レベル調節計８から供
給される弁開度信号から混合ラインの総流量を演算す
る。その総流量演算値は混合ライン各別に設けられた比
率器１０Ａ，１０Ｂ，１０Ｃに供給される。The total flow rate setter 9 calculates the total flow rate of the mixing line from the valve opening signal supplied from the level controller 8. The total flow rate calculation value is supplied to the ratio devices 10A, 10B and 10C provided for each mixing line.
【００１９】特に、本実施例では、図２にも示すよう
に、比率設定器１１と、基準開度設定器１２と、流量調
節弁３Ａ，３Ｂ，３Ｃ各別の開度制限器１３Ａ，１３
Ｂ，１３Ｃとが設けられている。In particular, in this embodiment, as shown in FIG. 2, the ratio setting device 11, the reference opening setting device 12, and the flow control valves 3A, 3B, 3C are provided with respective opening restrictors 13A, 13C.
B and 13C are provided.
【００２０】比率設定器１１は、混合ライン１Ａ，１
Ｂ，１Ｃの各比率設定Ｒ1 ，Ｒ2 ，Ｒ3 を合計で１にな
るように以下の式（１）〜（３）のように比率を変換し
て比率ｒ1 ，ｒ2 ，ｒ3 を求める。The ratio setter 11 includes the mixing lines 1A, 1
The ratios r 1 , r 2 , r 3 are converted by converting the ratios as in the following equations (1) to (3) so that the ratio settings R 1 , R 2 , R 3 of B and 1C become 1 in total. Ask for.
【００２１】 ｒ1 ＝Ｒ1 ／（Ｒ1 ＋Ｒ2 ＋Ｒ3 ） …（１） ｒ2 ＝Ｒ2 ／（Ｒ1 ＋Ｒ2 ＋Ｒ3 ） …（２） ｒ3 ＝Ｒ3 ／（Ｒ1 ＋Ｒ2 ＋Ｒ3 ） …（３） したがって、このように設定することにより、総流量設
定値ＦM に対して混合ライン１Ａ，１Ｂ，１Ｃの流量設
定値の和は、次式に示すように、常に総流量設定値ＦM
に等しくなる。R 1 = R 1 / (R 1 + R 2 + R 3 ) ... (1) r 2 = R 2 / (R 1 + R 2 + R 3 ) ... (2) r 3 = R 3 / (R 1 + R 2 + R 3 ) (3) Therefore, by setting in this way, the sum of the flow rate set values of the mixing lines 1A, 1B, 1C with respect to the total flow rate set value F M is always expressed by the following equation. Flow rate setting value F M
Is equal to
【００２２】 ＦM ・（Ｒ1 ／（Ｒ1 ＋Ｒ2 ＋Ｒ3 ）＋Ｒ2 ／（Ｒ1 ＋Ｒ2 ＋Ｒ3 ） ＋Ｒ3 ／（Ｒ1 ＋Ｒ2 ＋Ｒ3 ）） ＝ＦM …（４） このようにして求められた各比率ｒ1 ，ｒ2 ，ｒ3 が各
比率設定器１０Ａ，１０Ｂ，１０Ｃに設定される。F M · (R 1 / (R 1 + R 2 + R 3 ) + R 2 / (R 1 + R 2 + R 3 ) + R 3 / (R 1 + R 2 + R 3 )) = F M (4) The ratios r 1 , r 2 and r 3 thus obtained are set in the ratio setters 10A, 10B and 10C.
【００２３】また、基準開度設定器１２は、３台の流量
調節弁３Ａ，３Ｂ，３Ｃの合計開度によって１００％の
流量が得られる開度を以下の式（５）〜（７）から求
め、各基準開度設定値ｒｒ1 ，ｒｒ2 ，ｒｒ3 を基準開
度制限器１３Ａ，１３Ｂ，１３Ｃに供給する。Further, the reference opening setter 12 determines the opening at which 100% of the flow is obtained by the total opening of the three flow rate control valves 3A, 3B, 3C from the following equations (5) to (7). , and supplies the respective reference travel set point rr 1, rr 2, rr 3 reference opening restrictor 13A, 13B, to 13C.
【００２４】 ｒｒ1 ＝１００・Ｒ1 ／（Ｒ1 ＋Ｒ2 ＋Ｒ3 ） （％） …（５） ｒｒ2 ＝１００・Ｒ2 ／（Ｒ1 ＋Ｒ2 ＋Ｒ3 ） （％） …（６） ｒｒ3 ＝１００・Ｒ3 ／（Ｒ1 ＋Ｒ2 ＋Ｒ3 ） （％） …（７） 基準開度制限器１３Ａ，１３Ｂ，１３Ｃは、供給された
基準開度設定値ｒｒ1，ｒｒ2 ，ｒｒ3 に対して上限
（＋ｋ）および下限（−ｋ）を設定してその範囲内で調
節弁開度が動作するように制限値を設ける。Rr 1 = 100 · R 1 / (R 1 + R 2 + R 3 ) (%) (5) rr 2 = 100 · R 2 / (R 1 + R 2 + R 3 ) (%) (6) rr 3 = 100R 3 / (R 1 + R 2 + R 3 ) (%) (7) The reference opening restrictors 13A, 13B, 13C are supplied with the reference opening set values rr 1 , rr 2 , rr 3 The upper limit (+ k) and the lower limit (-k) are set with respect to, and a limit value is set so that the control valve opening operates within the range.
【００２５】この状態において、比率器１０では前記総
流量演算値に各比率を乗じ、流量設定値としてそれぞれ
流量調節計４Ａ，４Ｂ，４Ｃに出力する。各流量調節計
４Ａ，４Ｂ，４Ｃは、前述したようにそれぞれ流量設定
値と各流量計２Ａ，２Ｂ，２Ｃの計測値との偏差が零と
なるような各流量調節弁３Ａ，３Ｂ，３Ｃの弁開度指令
を各基準開度制限器１３Ａ，１３Ｂ，１３Ｃに出力す
る。各基準開度制限器１３Ａ，１３Ｂ，１３Ｃでは、各
流量調節弁３Ａ，３Ｂ，３Ｃの弁開度指令に上下限を設
定して弁開度を制御する。In this state, the ratio calculator 10 multiplies the calculated total flow rate by each ratio, and outputs the flow rate set values to the flow rate controllers 4A, 4B and 4C, respectively. As described above, the flow rate controllers 4A, 4B, and 4C have the flow rate control valves 3A, 3B, and 3C that have zero deviation between the flow rate setting values and the measurement values of the flow rate meters 2A, 2B, and 2C. The valve opening command is output to each of the reference opening restrictors 13A, 13B, 13C. Each of the reference opening degree limiters 13A, 13B, 13C controls the valve opening degree by setting upper and lower limits to the valve opening degree command of each of the flow rate control valves 3A, 3B, 3C.
【００２６】このように本実施例によれば、レベル調節
弁５と、各流量調節弁４Ａ，４Ｂ，４Ｃとの間に組合せ
の自由度がなくなるので、各ラインの基準開度を中心と
した範囲内で外乱を吸収できる安定したインライン混合
制御が可能となる。As described above, according to the present embodiment, since there is no degree of freedom in combination between the level control valve 5 and the flow rate control valves 4A, 4B, 4C, the reference opening of each line is the center. Stable in-line mixing control capable of absorbing disturbance within the range becomes possible.
【００２７】なお、混合ラインの各調節弁３Ａ，３Ｂ，
３Ｃは総流量制御に外乱を与えない範囲で動作する必要
がある。この条件をさらに確実にするためには、以下の
ような機能を付加すると良い。In addition, each control valve 3A, 3B of the mixing line,
3C needs to operate in a range that does not give a disturbance to the total flow rate control. To further secure this condition, the following functions may be added.
【００２８】すなわち、図３に示すように、各タンク群
Ａ，Ｂ，Ｃの出口にそれぞれポンプ２１Ａ，２１Ｂ，２
１Ｃと、各混合ラインの流体圧を測定する圧力計２２
Ａ，２２Ｂ，２２Ｃと，各圧力計２２Ａ，２２Ｂ，２２
Ｃの検出値に基づいてポンプ２１Ａ，２１Ｂ，２１Ｃの
回転数を制御する圧力調節計２３Ａ，２３Ｂ，２３Ｃと
を設け、各タンク群の出口の圧力を一定に保持するよう
にすれば、各タンクＡ，Ｂ，Ｃの液位変化によるヘッド
圧の影響を回避できる。That is, as shown in FIG. 3, pumps 21A, 21B and 2 are respectively provided at the outlets of the tank groups A, B and C, respectively.
1C and a pressure gauge 22 for measuring the fluid pressure of each mixing line
A, 22B, 22C and pressure gauges 22A, 22B, 22
By providing pressure regulators 23A, 23B, 23C for controlling the rotational speeds of the pumps 21A, 21B, 21C based on the detected value of C, and keeping the pressure at the outlet of each tank group constant, It is possible to avoid the influence of the head pressure due to the liquid level changes of A, B and C.
【００２９】また、タンクの空または設定流量を積算し
た後のタンク組合せの切換時には、タンク番号及び混合
比率が更新されるが、この切換時には、図４に示すよう
に、旧比率の基準開度設定値から新比率の基準開度設定
値への切替えが滑らかに行うことにより、バンプレス制
御が可能となる。Further, at the time of switching the tank combination after the tank is empty or the set flow rate is integrated, the tank number and the mixing ratio are updated. At the time of this switching, as shown in FIG. By smoothly switching from the set value to the reference opening set value of the new ratio, bumpless control becomes possible.
【００３０】以上本実施例は、３群のタンクを例に説明
したが、本発明は４群以上のタンクの混合切替えにも適
用でき、また、原料の混合、燃料の混合等、各種の液
体、粉体等の混合制御にも適用できる。Although the present embodiment has been described by taking the tank of three groups as an example, the present invention can be applied to the mixing switching of the tanks of four or more groups, and various liquids such as mixing raw materials and mixing fuel. It can also be applied to control of mixing powders and the like.
【００３１】[0031]
【発明の効果】以上説明したように本発明によれば、レ
ベル調節弁と各流量調節弁との間の組み合わせの自由度
を制限することができるので、各流量制御弁とレベル調
節弁との相互干渉による制御の不安定を防止でき、各基
準開度を中心とした範囲で各ラインの外乱を吸収できる
安定した混合制御が可能となる。As described above, according to the present invention, since the degree of freedom of combination between the level control valve and each flow rate control valve can be limited, the flow rate control valve and the level control valve can be combined with each other. Instability of control due to mutual interference can be prevented, and stable mixing control capable of absorbing the disturbance of each line within a range around each reference opening becomes possible.
【図１】本発明に係るインライン混合制御装置の一実施
例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of an in-line mixing control device according to the present invention.
【図２】図１に示す実施例の要部構成を示す説明図であ
る。FIG. 2 is an explanatory diagram showing a main configuration of the embodiment shown in FIG.
【図３】本発明に係るインライン混合制御装置の他の実
施例構成を示す説明図である。FIG. 3 is an explanatory diagram showing the configuration of another embodiment of the in-line mixing control device according to the present invention.
【図４】本発明に係るインライン混合制御装置の他の実
施例を示す説明図である。FIG. 4 is an explanatory view showing another embodiment of the in-line mixing control device according to the present invention.
【図５】インライン混合切換制御装置の従来例を示す構
成図である。FIG. 5 is a configuration diagram showing a conventional example of an in-line mixing switching control device.
１Ａ，１Ｂ，１Ｃ 混合ライン ２Ａ，２Ｂ，２Ｃ 流量計 ３Ａ，３Ｂ，３Ｃ 流量調節弁 ４Ａ，４Ｂ，４Ｃ 流量調節計 ５ レベル調節弁 ６ バッファタンク ７ レベル計 ８ レベル調節計 ９ 総流量設定器 １０Ａ，１０Ｂ，１０Ｃ １１ 比率設定器 １２ 基準開度設定器 １３Ａ，１３Ｂ，１３Ｃ 基準開度制限器 1A, 1B, 1C Mixing line 2A, 2B, 2C Flowmeter 3A, 3B, 3C Flow control valve 4A, 4B, 4C Flow controller 5 Level control valve 6 Buffer tank 7 Level meter 8 Level controller 9 Total flow rate setter 10A , 10B, 10C 11 Ratio setting device 12 Reference opening setting device 13A, 13B, 13C Reference opening limiting device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 米岡 利彦 東京都港区芝浦一丁目１番１号 株式会社 東芝本社事務所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihiko Yoneoka 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba Head Office
Claims (1)
のタンクと、各タンクに接続された混合ラインにそれぞ
れ配設された流量調節弁と、前記混合ラインが合流する
ラインに配設されたレベル調節弁と、前記合流ラインを
介して混合された製品を貯蔵するバッファタンクと、前
記各流量制御弁およびレベル調節弁の開度を制御して前
記製品の混合比率を一定にするとともに前記バッファタ
ンクの液位を一定値に維持する制御部とを備えたインラ
イン混合制御装置において、 前記制御部は、各混合比率に基づいた各流量調節弁の開
度により前記液位を維持する流量を決定する基準開度設
定値を各流量調節弁毎に求める基準開度設定値演算手段
と、求められた各基準開度設定値の上下限値を設定して
前記各流量調節弁に供給される各基準開度設定値を制限
する設定値制限手段と、 を具備することを特徴とするインライン混合制御装置。1. A plurality of tanks for storing different kinds of materials to be mixed, flow rate control valves respectively provided in mixing lines connected to the respective tanks, and a line where the mixing lines meet. A level control valve, a buffer tank for storing the mixed product through the merging line, a flow control valve and the opening degree of the level control valve to control the mixing ratio of the product and the buffer. In the in-line mixing control device including a control unit for maintaining the liquid level of the tank at a constant value, the control unit determines the flow rate for maintaining the liquid level by the opening degree of each flow rate control valve based on each mixing ratio. The reference opening set value calculating means for obtaining the reference opening set value for each flow rate control valve, and the upper and lower limit values of the obtained reference opening set value are set to be supplied to each of the flow rate control valves. Reference opening setting Line mixing control apparatus characterized by comprising a setting value limiting means for limiting the value, the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3188953A JP3015521B2 (en) | 1991-07-29 | 1991-07-29 | In-line mixing control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3188953A JP3015521B2 (en) | 1991-07-29 | 1991-07-29 | In-line mixing control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0772934A true JPH0772934A (en) | 1995-03-17 |
| JP3015521B2 JP3015521B2 (en) | 2000-03-06 |
Family
ID=16232813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3188953A Expired - Lifetime JP3015521B2 (en) | 1991-07-29 | 1991-07-29 | In-line mixing control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3015521B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005539329A (en) * | 2002-09-17 | 2005-12-22 | エクシジェント テクノロジーズ， エルエルシー | Flow control system |
| JP2008269311A (en) * | 2007-04-20 | 2008-11-06 | Hitachi Ltd | Lot segment management system |
| JP2009020747A (en) * | 2007-07-12 | 2009-01-29 | Asahi Breweries Ltd | Process control system |
| US7695603B2 (en) | 2001-06-13 | 2010-04-13 | Eksigent Technologies, Llc | Electroosmotic flow controller |
| JP2011512234A (en) * | 2008-02-20 | 2011-04-21 | ネルコー ピューリタン ベネット エルエルシー | System and method for extended volume range ventilation |
-
1991
- 1991-07-29 JP JP3188953A patent/JP3015521B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7695603B2 (en) | 2001-06-13 | 2010-04-13 | Eksigent Technologies, Llc | Electroosmotic flow controller |
| US8795493B2 (en) | 2001-06-13 | 2014-08-05 | Dh Technologies Development Pte. Ltd. | Flow control systems |
| JP2005539329A (en) * | 2002-09-17 | 2005-12-22 | エクシジェント テクノロジーズ， エルエルシー | Flow control system |
| JP4854197B2 (en) * | 2002-09-17 | 2012-01-18 | エービー サイエックス エルエルシー | Flow control method and flow control device |
| JP2008269311A (en) * | 2007-04-20 | 2008-11-06 | Hitachi Ltd | Lot segment management system |
| JP2009020747A (en) * | 2007-07-12 | 2009-01-29 | Asahi Breweries Ltd | Process control system |
| JP2011512234A (en) * | 2008-02-20 | 2011-04-21 | ネルコー ピューリタン ベネット エルエルシー | System and method for extended volume range ventilation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3015521B2 (en) | 2000-03-06 |
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