JPH0658609B2 - PH automatic adjustment device - Google Patents
PH automatic adjustment deviceInfo
- Publication number
- JPH0658609B2 JPH0658609B2 JP61028157A JP2815786A JPH0658609B2 JP H0658609 B2 JPH0658609 B2 JP H0658609B2 JP 61028157 A JP61028157 A JP 61028157A JP 2815786 A JP2815786 A JP 2815786A JP H0658609 B2 JPH0658609 B2 JP H0658609B2
- Authority
- JP
- Japan
- Prior art keywords
- adjusting agent
- circulation pump
- measurement
- control valve
- flow
- 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 - Lifetime
Links
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- Control Of Non-Electrical Variables (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明はＰＨ自動調整装置に関し、特に、薬液、飲料等
のＰＨを所定値に高精度に調整する装置に適用されるも
のである。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an automatic pH adjusting apparatus, and in particular, it is applied to an apparatus for adjusting the pH of a drug solution, a beverage or the like to a predetermined value with high accuracy.
＜従来の技術とその問題点＞ 一般に、注射液等の薬液はそのＰＨ値を例えば±0.1の
高精度に調整しなければならない。<Prior art and its problems> In general, the pH value of a drug solution such as an injection solution must be adjusted with high accuracy of, for example, ± 0.1.
従来のＰＨ調整方法は、まず検液をサンプリングしてＰ
Ｈ値の測定を行い、調整すべき液体に調整剤を添加し
て、液体全体を撹拌したのち、再び検液をサンプリング
して測定を行い、ＰＨ値が所定の許容範囲になるまでこ
の手法を繰返すことにより行われていた。しかしこの方
法では、人手と時間を要する欠点があるばかりでなく、
検液の採取や調整剤の添加の際に調製すべき薬液が外気
に触れるために菌や塵が混入するおそれがあり、そのた
めに調整設備全体を無菌、無塵室に設置するなどの大が
かりな設備を必要とする欠点があった。In the conventional pH adjustment method, the test solution is first sampled and then P
After measuring the H value, adding a regulator to the liquid to be adjusted, stirring the whole liquid, sampling the test liquid again, and measuring the pH value, this method is used until the PH value falls within a predetermined allowable range. It was done by repeating. However, this method not only has the drawback of requiring labor and time,
There is a risk that bacteria and dust will be mixed in because the chemical solution to be prepared when the test solution is collected and the regulator is added is exposed to the outside air. There was a drawback that required equipment.
これに対し出願人は、特願昭58-228998 号として、外気
と完全に遮断された装置内で自動的にＰＨ値等を調整す
る薬液等の溶液自動調製用装置を提案している。しか
し、この装置によれば、調液タンク内にＰＨ計が設けら
れているため、調液時の温度、撹拌状況等の変化により
ＰＨ計の測定値がゆらぎ、そのために高精度のＰＨ調整
は困難である。特に、調整剤として唯一種だけ定められ
て、ＰＨ値の行き過ぎを戻す手段が許されない場合があ
り、このような場合は、調製すべき薬液の量、流速等の
影響を受けることなく例えば0.05程度の精度でＰＨ値を
測定しながら自動調整することはきわめて重要である。On the other hand, the applicant proposes, as Japanese Patent Application No. 58-228998, an apparatus for automatically preparing a solution such as a chemical solution which automatically adjusts the PH value and the like in an apparatus completely shielded from the outside air. However, according to this device, since the PH meter is provided in the solution preparation tank, the measured value of the PH meter fluctuates due to changes in the temperature and the stirring condition at the time of solution preparation, and therefore a highly accurate PH adjustment is not possible. Have difficulty. In particular, there is a case where only one kind of regulator is defined and a means for returning the PH value overshoot is not allowed, and in such a case, for example, about 0.05 without being affected by the amount of the chemical solution to be prepared, the flow rate, etc. It is extremely important to automatically adjust while measuring the PH value with the accuracy of.
＜発明の目的＞ そこで本発明の目的は、外気と完全に遮断された装置内
で、人手を介在させることなく、高精度のＰＨ調整を自
動的かつ短時間に行い得るＰＨ自動調整装置を提供する
ことである。<Objects of the Invention> Therefore, an object of the present invention is to provide a PH automatic adjustment device capable of performing highly accurate PH adjustment automatically and in a short time in a device completely shielded from the outside air without intervention of human hands. It is to be.
＜発明の構成＞ 本発明のＰＨ自動調整装置は、ＰＨ調整すべき液体を循
環する循環ポンプと、その循環ポンプの吐出側の循環本
管に設けられ、かつその循環本管よりも小さい径の分岐
路と、その分岐路に設けられた流量制御弁と、その流量
制御弁を介して接続されたＰＨ測定セルと、そのＰＨ測
定セル内に設けられたＰＨセンサおよび圧力計と、上記
ＰＨ測定セルの溢出液を上記循環ポンプの吸込側へ戻す
流路と、ＰＨ調整剤を上記循環ポンプの吸込側へ注入す
る流路に設けられた調整剤供給用ポンプとからなるとと
もに、上記ＰＨセンサの測定信号により上記調整剤供給
用ポンプを制御するＰＨコントローラと、上記圧力計か
ら出力される測定信号により上記流量制御弁を制御する
圧力コントローラとを有することによって特徴付けられ
ている。<Structure of the Invention> An automatic pH adjusting device of the present invention is provided in a circulation pump that circulates a liquid whose pH is to be adjusted, and a circulation main pipe on the discharge side of the circulation pump, and has a diameter smaller than that of the circulation main pipe. A branch path, a flow control valve provided in the branch path, a PH measurement cell connected via the flow control valve, a PH sensor and a pressure gauge provided in the PH measurement cell, and the above-mentioned PH measurement. In addition to the flow path for returning the overflow liquid of the cell to the suction side of the circulation pump and the adjusting agent supply pump provided in the flow path for injecting the PH adjusting agent to the suction side of the circulation pump, Characterized by having a PH controller that controls the regulator supply pump by a measurement signal, and a pressure controller that controls the flow control valve by a measurement signal output from the pressure gauge. There is.
＜作用＞ 循環ポンプの吐出側の循環本管よりも小さい径の分岐路
からＰＨ測定セルを通り、循環ポンプの吸込側へ戻る小
ループが形成されて調整剤添加直後の液体の一部がこの
小ループを静かに還流している。ＰＨセンサは本流から
分岐したＰＨ測定セル内に設けられているため本流の動
圧の影響を受けず静圧も容易に一定値に保持されるか
ら、ＰＨセンサの測定値は高精度に維持される。このＰ
Ｈセンサの測定値をフィードバック値として調整剤供給
量が自動制御される。<Function> A small loop is formed from a branch passage having a diameter smaller than that of the circulation main pipe on the discharge side of the circulation pump, passing through the PH measurement cell, and returning to the suction side of the circulation pump. The small loop is gently flowing back. Since the PH sensor is provided in the PH measurement cell branched from the main stream, the static pressure can be easily maintained at a constant value without being affected by the dynamic pressure of the main stream. Therefore, the measurement value of the PH sensor is maintained with high accuracy. It This P
The supply amount of the adjusting agent is automatically controlled by using the measured value of the H sensor as a feedback value.
また、圧力計の測定信号は圧力コントローラに入力さ
れ、この圧力コントローラは測定セル内の圧力が一定値
になるよう流量制御弁を制御する。Further, the measurement signal of the pressure gauge is input to the pressure controller, and this pressure controller controls the flow control valve so that the pressure in the measurement cell becomes a constant value.
＜実施例＞ 第１図に本発明実施例の全体構成図を示し、第２図にそ
の要部構成図を示す。<Embodiment> FIG. 1 shows an overall configuration diagram of an embodiment of the present invention, and FIG. 2 shows a configuration diagram of essential parts thereof.
調製すべき液体は調製タンク１の導出管２，循環ポンプ
３，サブタンク４，及び調製タンク１の導入管５を通っ
て循環している。この大循環ループの途中に、弁６を介
して液体の取出管７が設けられ、また、使用後に調製タ
ンク１等を乾燥し、殺菌処理するための熱風発生機８
と、その熱風を導入するための管９及び弁１０が付設さ
れている。循環ポンプ３の吸込側にＰＨ調整剤添加装置
１２が設けられ、循環ポンプ３の吐出側にＰＨ測定装置
１１が設けられている。The liquid to be prepared circulates through the outlet pipe 2, the circulation pump 3, the sub-tank 4, and the inlet pipe 5 of the preparation tank 1 of the preparation tank 1. A liquid take-out pipe 7 is provided in the middle of this general circulation loop via a valve 6, and a hot air generator 8 for drying and sterilizing the preparation tank 1 and the like after use.
And a pipe 9 and a valve 10 for introducing the hot air are attached. The PH adjusting agent adding device 12 is provided on the suction side of the circulation pump 3, and the PH measuring device 11 is provided on the discharge side of the circulation pump 3.
第２図に本発明実施例の要部をなすＰＨ測定装置１１と
ＰＨ調整剤添加装置１２の具体的構成を示す。循環ポン
プ３の吐出側の主還流路２１の側面と垂直に分岐路２２
が接続され、流量制御弁２３を介してＰＨ測定セル２４
が設けられている。分岐路２２の断面積は主還流路２１
に比べて格段に小さく、実施例において主還流路の直径
40mm，分岐路の直径4mm，その断面積比は100：１になっ
ている。測定セル２４内にはＰＨセンサ２５，圧力計２
６が設けられ、測定セル上部には溢出液の流路２７が設
けられている。FIG. 2 shows a specific configuration of the PH measuring device 11 and the PH adjusting agent adding device 12 which are essential parts of the embodiment of the present invention. A branch passage 22 is provided perpendicularly to the side surface of the main return passage 21 on the discharge side of the circulation pump 3.
Is connected, and the PH measurement cell 24 is connected via the flow control valve 23.
Is provided. The cross-sectional area of the branch passage 22 is the main return passage 21.
The diameter of the main return passage is much smaller than that of
40mm, diameter of branch path is 4mm, and its cross-sectional area ratio is 100: 1. In the measuring cell 24, a PH sensor 25 and a pressure gauge 2
6 is provided, and an overflow liquid channel 27 is provided above the measurement cell.
このように、第１図に示すＰＨ測定装置１１に対応する
構成として、このＰＨ測定セル２４内に設けられたＰＨ
センサ２５がある。また、ＰＨ調整剤添加装置１２に対
応する構成として、まず、このＰＨセンサ２５の測定信
号に基づいて、調整剤供給ポンプ２９を後述する電気的
制御系によって制御するＰＨコントローラ３４がある。
この調整剤供給ポンプ２９の吸込側にはＰＨ調整剤を収
容するための調整剤タンク２８が設けられ、調整剤供給
ポンプ２９は、ＰＨコントローラ３４の制御によって、
タンク２８内の調整剤の所定量を吐出側に送り出すよう
になっている。また、そのポンプ２９の吐出側がＴ形コ
ネクタ３０，流路３１を経て、循環ポンプ３の吸込側３
２に接続されている。Ｔ形コネクタ３０には上記した測
定セルからの流路２７が接続され、ここで測定セルの溢
出液と調整剤が合流し、調整剤が添加された状態で、流
路３１に送られる。以上がＰＨ調整剤添加装置１２の構
成である。As described above, as a configuration corresponding to the PH measurement device 11 shown in FIG.
There is a sensor 25. As a configuration corresponding to the pH adjusting agent adding device 12, first, there is a PH controller 34 which controls the adjusting agent supply pump 29 by an electric control system described later based on the measurement signal of the PH sensor 25.
An adjusting agent tank 28 for containing a PH adjusting agent is provided on the suction side of the adjusting agent supply pump 29, and the adjusting agent supply pump 29 is controlled by the PH controller 34.
A predetermined amount of the adjusting agent in the tank 28 is sent to the discharge side. In addition, the discharge side of the pump 29 passes through the T-shaped connector 30 and the flow path 31, and the suction side 3 of the circulation pump 3
Connected to 2. The T-connector 30 is connected to the flow path 27 from the above-described measurement cell, and the overflow liquid of the measurement cell and the adjusting agent are merged therein, and the adjusting agent is added to the flow path 31. The above is the configuration of the pH adjusting agent adding device 12.
次にこの実施例の電気的制御系について説明する。第２
図において電気信号の経路は点線で示している。測定セ
ル２４の圧力計２６の測定信号は圧力コントローラ３３
に入力され、ここで目標値との偏差が演算されて流量制
御弁２３が制御され、その結果、測定セル２４の圧力が
一定値に制御される。実施例において、測定セルの圧力
を相対圧力0.1kg/cm2に制御した。ＰＨセンサ２５の出
力信号はＰＨコントローラ３４に入力される。ここでＰ
Ｈ値が指示され、かつ記録される。また、目標値との偏
差が演算されて調整剤供給用ポンプ２９が制御される。
その結果、偏差の大きいときは調整剤が大量に主還流路
３２へ供給され、偏差が小さくなる程、供給量が減少
し、偏差が０になると供給が停止する。Next, the electrical control system of this embodiment will be described. Second
In the figure, the paths of electric signals are indicated by dotted lines. The measurement signal of the pressure gauge 26 of the measurement cell 24 is the pressure controller 33.
, The deviation from the target value is calculated, the flow control valve 23 is controlled, and as a result, the pressure in the measuring cell 24 is controlled to a constant value. In the examples, the pressure in the measuring cell was controlled to a relative pressure of 0.1 kg / cm 2 . The output signal of the PH sensor 25 is input to the PH controller 34. Where P
The H value is indicated and recorded. Further, the deviation from the target value is calculated and the adjusting agent supply pump 29 is controlled.
As a result, when the deviation is large, a large amount of the regulator is supplied to the main reflux passage 32, the smaller the deviation is, the smaller the supply amount is, and when the deviation becomes 0, the supply is stopped.
＜発明の効果＞ 本発明のＰＨ自動調整装置によれば、調製液の循環路と
は別に、調製液の一部を取り込む小ループの流路を形成
し、その中に測定セルを設けたから、例えば循環路の流
量が200〜400／分、圧力が１〜３kg/cm2のときに、測
定セル内の流量を例えば−0.1〜＋0.2kg/cm2と、非常に
小さな値に安定に維持することができた。その結果、Ｐ
Ｈセンサの電極内へ調整液が流入したり、電極内部液が
流出したり、電極に調整液による力が作用することが無
くなり、外乱の非常に少ない状態で、連続的に繰返しＰ
Ｈ値を高精度で測定し、かつ制御することが可能になっ
た。また、測定セルが小形のため、測定セル内の洗浄が
完全かつ容易になって測定精度が向上し、更に標準液に
よる電極較正を行うための電極の着脱作業も容易になっ
た。<Effects of the Invention> According to the pH automatic adjusting apparatus of the present invention, in addition to the circulation path for the preparation liquid, a small loop flow path for taking in a part of the preparation liquid is formed, and the measurement cell is provided therein. For example, when the flow rate in the circulation path is 200 to 400 / min and the pressure is 1 to 3 kg / cm 2 , the flow rate in the measuring cell is stably maintained at a very small value, for example, −0.1 to +0.2 kg / cm 2. We were able to. As a result, P
The adjusting liquid does not flow into the electrode of the H sensor, the liquid inside the electrode flows out, and the force of the adjusting liquid does not act on the electrode.
It has become possible to measure and control the H value with high accuracy. In addition, since the measuring cell is small, the inside of the measuring cell can be cleaned completely and easily, the measurement accuracy is improved, and the electrode attachment / detachment work for calibrating the electrode with the standard solution is also facilitated.
また、分岐路に流量制御弁を設け、この流量制御弁はＰ
Ｈ測定セル内の圧力を測定する圧力計からの出力に基づ
いて、そのセル内の圧力が一定となるよう圧力コントロ
ーラによって駆動制御されるよう構成されたので、静圧
が一定に保持され、外乱の一要素を取り除くことがで
き、さらに、測定の精度向上を図ることができる。Further, a flow control valve is provided in the branch passage, and this flow control valve is P
Based on the output from the pressure gauge that measures the pressure in the H measurement cell, the pressure controller is configured to drive and control the pressure in the cell so that the static pressure is kept constant and the disturbance is One element can be removed, and the accuracy of measurement can be improved.
第１図は本発明実施例の全体構成図、第２図は第１図の
要部を示す図である。 １……調製タンク ３……循環ポンプ １１……ＰＨ測定装置 １２……ＰＨ調整剤添加装置 ２１……循環ポンプ吐出側 ２２……分岐路 ２４……ＰＨ測定セル ２５……ＰＨセンサ ２７……測定セルからの導出流路 ２８……調整剤タンク ２９……調整剤供給ポンプ ３１……流路 ３２……循環ポンプの吸込側 ３４……ＰＨコントローラFIG. 1 is an overall configuration diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing a main part of FIG. 1 …… Preparation tank 3 …… Circulation pump 11 …… PH measuring device 12 …… PH adjusting agent addition device 21 …… Circulation pump discharge side 22 …… Branch path 24 …… PH measuring cell 25 …… PH sensor 27 …… Derivation flow path from measurement cell 28 ... Adjusting agent tank 29 ... Adjusting agent supply pump 31 ... Flow path 32 ... Suction side of circulation pump 34 ... PH controller
Claims (2)
と、その循環ポンプの吐出側の循環本管に設けられ、か
つその循環本管よりも小さい径の分岐路と、その分岐路
に設けられた流量制御弁と、その流量制御弁を介して接
続されたＰＨ測定セルと、そのＰＨ測定セル内に設けら
れたＰＨセンサおよび圧力計と、上記ＰＨ測定セルの溢
出液を上記循環ポンプの吸込側へ戻す流路と、ＰＨ調整
剤を上記循環ポンプの吸込側へ注入する流路に設けられ
た調整剤供給用ポンプとからなるとともに、上記ＰＨセ
ンサの測定信号により上記調整剤供給用ポンプを制御す
るＰＨコントローラと、上記圧力計から出力される測定
信号により上記流量制御弁を制御する圧力コントローラ
とを有する、ＰＨ自動調整装置。1. A circulation pump that circulates a liquid to be pH-adjusted, a branch main passage on the discharge side of the circulation pump, and a branch passage having a diameter smaller than that of the circulation main pipe, and the branch passage. Flow control valve, a PH measurement cell connected via the flow control valve, a PH sensor and a pressure gauge provided in the PH measurement cell, and an overflow liquid of the PH measurement cell of the circulation pump. The adjusting agent supply pump includes a flow path for returning to the suction side and a adjusting agent supply pump provided in the flow path for injecting the PH adjusting agent into the suction side of the circulation pump, and the adjusting agent supply pump is provided by the measurement signal of the PH sensor. A PH automatic adjustment device having a PH controller for controlling the flow rate and a pressure controller for controlling the flow rate control valve according to a measurement signal output from the pressure gauge.
上記ＰＨ調整剤を混入する流路が、一本に合流してい
る、特許請求の範囲第１項記載のＰＨ自動調整装置。2. A flow path for returning the overflow liquid of the pH measuring cell,
The automatic pH adjusting device according to claim 1, wherein the flow paths in which the pH adjusting agent is mixed are joined together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61028157A JPH0658609B2 (en) | 1986-02-12 | 1986-02-12 | PH automatic adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61028157A JPH0658609B2 (en) | 1986-02-12 | 1986-02-12 | PH automatic adjustment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62185158A JPS62185158A (en) | 1987-08-13 |
| JPH0658609B2 true JPH0658609B2 (en) | 1994-08-03 |
Family
ID=12240916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61028157A Expired - Lifetime JPH0658609B2 (en) | 1986-02-12 | 1986-02-12 | PH automatic adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0658609B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7147602B2 (en) * | 2019-01-31 | 2022-10-05 | 株式会社ナカヨ | Washing liquid exchange predictive analysis system |
| CN115389292B (en) * | 2022-10-31 | 2022-12-27 | 仁和智海智能科技(山东)有限公司 | Quantitative small-volume sample pH value detection device for aerosol enrichment and design method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS523505A (en) * | 1975-06-24 | 1977-01-12 | Okishi Efuruuento Kontorooru L | Method of treating aqueous acid solution containing dissolved metals |
| JPS5438239U (en) * | 1977-08-22 | 1979-03-13 | ||
| JPS5541347U (en) * | 1978-09-11 | 1980-03-17 |
-
1986
- 1986-02-12 JP JP61028157A patent/JPH0658609B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62185158A (en) | 1987-08-13 |
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