JPH01304318A - Flow rate measuring mechanism - Google Patents
Flow rate measuring mechanismInfo
- Publication number
- JPH01304318A JPH01304318A JP13509188A JP13509188A JPH01304318A JP H01304318 A JPH01304318 A JP H01304318A JP 13509188 A JP13509188 A JP 13509188A JP 13509188 A JP13509188 A JP 13509188A JP H01304318 A JPH01304318 A JP H01304318A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- pipe
- flow
- liquid
- fluid
- 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
- 239000007788 liquid Substances 0.000 claims abstract description 82
- 239000012530 fluid Substances 0.000 claims abstract description 38
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 238000005259 measurement Methods 0.000 description 15
- 239000000084 colloidal system Substances 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野］
本発明は流量計を用いて流体の流量を測定する際に好適
に使用される流量測定機構に関し、更に詳述すると、流
体の流量が流量計の測定可能範囲を外れた場合でも流量
を正確に測定することができる流量測定機構に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a flow rate measurement mechanism that is suitably used when measuring the flow rate of a fluid using a flow meter. The present invention relates to a flow rate measurement mechanism that can accurately measure flow rate even when the flow rate is outside the measurable range of a meter.
［従来の技術］
従来、分析装置等において試料液などの液体の流量を測
定する場合、第５図に示すように液体の流通管ａに流量
計すを介装して、流通管ａ内を図中矢印方向に流れる液
体の流量を測定することが一般に行われている。[Prior Art] Conventionally, when measuring the flow rate of a liquid such as a sample liquid in an analyzer or the like, a flow meter is inserted into the liquid flow pipe a as shown in FIG. It is common practice to measure the flow rate of liquid flowing in the direction of the arrow in the figure.
この場合、流量計すとしては種々のものが使用されてい
るが、一般に流量網はそれほど広範囲の流量を測定し得
るものではなく、通常は一定の測定可能な流量範囲（例
えば０．３〜３Ｑ／ｍｊｎ）を有しており、この範囲外
の流量は精度よく測定することができない。In this case, various types of flowmeters are used, but the flow rate network is generally not capable of measuring a wide range of flow rates. /mjn), and flow rates outside this range cannot be measured accurately.
［発明が解決しようとする課題］
上述したように流量計を用いて液体の流量を測定する場
合、液体の流量が常に流量計の測定可能範囲内、例えば
０．３〜３Ｑ／ｍｉｎにあるときは正確に流量の測定を
行うことができるか、液体の流量が流量計の測定可能範
囲外となる場合、例えば０．２〜ＩＱ、／ｎ＋ｊｎの範
囲で変化するような流量を測定する場合には、測定すべ
き流量の下限付近は流量計の測定可能範囲より低流量と
なり、この部分の流量を正確に測定できなくなるという
問題がある。また、測定すべき流量の」１限付近が流量
計の測定可能範囲より高流量となる場合、例えば流量が
２〜３．２Ｑ／ｍｉｎの範囲で変化するような場合にも
同様の問題が生じる。[Problems to be Solved by the Invention] When measuring the flow rate of a liquid using a flowmeter as described above, when the flow rate of the liquid is always within the measurable range of the flowmeter, for example, 0.3 to 3Q/min. Is it possible to accurately measure the flow rate?If the flow rate of the liquid is outside the measurable range of the flowmeter, for example, when measuring a flow rate that changes in the range of 0.2 to IQ, /n + jn There is a problem that near the lower limit of the flow rate to be measured, the flow rate is lower than the measurable range of the flow meter, and the flow rate in this part cannot be measured accurately. A similar problem also occurs when the flow rate to be measured near the 1st limit is higher than the measurable range of the flowmeter, for example, when the flow rate changes in the range of 2 to 3.2 Q/min. .
本発明は、上記事情に鑑みなされたもので、流量計を用
いて液体等の流体の流量を測定する場合において、測定
すべき流体の流量が流量計の測定範囲外となるときでも
正確に流量を測定することが可能な流量測定機構を提供
することを目的とする。The present invention has been made in view of the above circumstances, and when measuring the flow rate of fluid such as liquid using a flowmeter, the present invention can accurately measure the flow rate even when the flow rate of the fluid to be measured is outside the measurement range of the flowmeter. The purpose of the present invention is to provide a flow rate measurement mechanism that can measure the flow rate.
［課題を解決するための手段］
本発明は、上記目的を達成するため、液体の流通管に流
量側を介装し、かつ分流管の一端を上記流通管の流量計
より上流側に連結し、他端を流通管の流量計より下流側
に連結すると共に、上記流通管から分流管内に流体を分
流させてこの流体を流通管に還流させる流量発生装置を
該分流管に設番づたことを特徴とする流量測定機構を提
供する。[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a flow rate side interposed in a liquid flow pipe, and connects one end of the branch pipe to the upstream side of the flow meter of the flow pipe. , the other end is connected to the downstream side of the flow meter of the distribution pipe, and a flow rate generating device is installed in the distribution pipe to divert fluid from the distribution pipe into the distribution pipe and return this fluid to the distribution pipe. The present invention provides a flow rate measurement mechanism characterized by:
この場合、本発明に用いる流量計の種類に制限はなく、
公知のあらゆる流量側を使用することができる。In this case, there are no restrictions on the type of flowmeter used in the present invention,
Any known flow rate side can be used.
また、分流管に設ける流量発生装置の構成にも特に限定
はなく、流体を流通管に還流させ得るものであればいず
れのものでも使用し得るが、後述する第１図に示すよう
に高出力の送液ポンプとオリフィスとを組み合わせたも
のや、定量ポンプ等を特に好適に用いることができる。Furthermore, there is no particular limitation on the configuration of the flow rate generating device installed in the distribution pipe, and any device can be used as long as it can return the fluid to the flow pipe. A combination of a liquid feeding pump and an orifice, a metering pump, etc. can be particularly preferably used.
［作用］
本発明の流量測定機構は、上述した構成としたことによ
り、測定すべき流体の流量が流斌別の測定可能範囲より
低くなる場合には、流量発生装置の作動で流通管を流れ
る流体の一部を分流管を通して流通管の流量計より下流
側から上流側に還流させることによって、流通管を流れ
る液体の流量に分流管からの流体の流量を付加し、流量
側を通る流体の流量を高くして流量計の測定可能範囲内
に入れることができ、従って、流量計の測定値から分流
管から付加した流量の値を引くことにより、流通管を流
通する流体の流量を正確に求めることができる。また、
測定すべき流体の流量が流量計の測定可能範囲より高く
なる場合には、流量発生装置の作動で流通管を流れる流
体の一部を分流管を通して流通管の流量計より上流側か
ら下流側に還流させることによって、流通管を流れる流
体の流量から分流管に流れる流体の流量を減じ、流量計
を通る流体の流量を低くして流量計の測定可能範囲内に
入れることができ、従って、流量計の測定値に分流管に
分流させた流体の流量値を加えることにより、流通管を
流通する流体の流量を正確に求めることができるもので
ある。[Function] The flow rate measurement mechanism of the present invention has the above-described configuration, so that when the flow rate of the fluid to be measured is lower than the measurable range for each flow, the flow rate generating device is activated to prevent the fluid from flowing through the flow pipe. By circulating a portion of the fluid from the downstream side to the upstream side of the flow meter of the distribution pipe through the distribution pipe, the flow rate of the fluid from the distribution pipe is added to the flow rate of the liquid flowing through the distribution pipe, and the flow rate of the fluid passing through the flow rate side is increased. The flow rate can be increased to within the measurable range of the flow meter, and therefore, by subtracting the value of the flow rate added from the diverter pipe from the measured value of the flow meter, the flow rate of the fluid flowing through the flow pipe can be accurately determined. You can ask for it. Also,
When the flow rate of the fluid to be measured is higher than the measurable range of the flowmeter, the flow generator operates to divert a portion of the fluid flowing through the flow pipe from the upstream side of the flow meter to the downstream side of the flow pipe through the distribution pipe. By refluxing, the flow rate of the fluid flowing through the distribution pipe can be reduced from the flow rate of the fluid flowing through the distribution pipe, and the flow rate of the fluid passing through the flowmeter can be lowered to be within the measurable range of the flowmeter, thus reducing the flow rate. By adding the flow rate value of the fluid diverted into the flow pipe to the measured value of the meter, the flow rate of the fluid flowing through the flow pipe can be accurately determined.
次に実施例を示し、本発明を具体的に説明するが、本発
明は下記実施例に限定されるものではない。EXAMPLES Next, the present invention will be specifically explained with reference to Examples, but the present invention is not limited to the following Examples.
［実施例］
第１−図は本発明の一実施例に係る流量測定機構を示す
ものである。図中１−は流量を測定すべき液体が流通す
る流通管で、上記液体の流量Ｑ１は例えば０．１〜ｌＱ
、／ｍｉｎの範囲で変化する。また。[Embodiment] Figure 1 shows a flow rate measuring mechanism according to an embodiment of the present invention. In the figure, 1- is a flow pipe through which the liquid whose flow rate is to be measured flows, and the flow rate Q1 of the liquid is, for example, 0.1 to lQ.
,/min. Also.
２は上記流通管１に介装された流量Ｗ−１で、この流量
計の測定可能な流量範囲は例えば０．３〜３ ｎ ／
＋＋＋ｉｎである。更に、３は一端が流通管１の流量計
２より上流側に連結され、他端が流通管１の流量計２よ
り下流側に連結された分流管である。2 is a flow rate W-1 installed in the flow pipe 1, and the measurable flow rate range of this flowmeter is, for example, 0.3 to 3 n/
+++in. Further, reference numeral 3 denotes a branch pipe having one end connected to the upstream side of the flow meter 2 of the flow pipe 1 and the other end connected to the downstream side of the flow meter 2 of the flow pipe 1.
この分流管３には、その他端側から一端側にかけて順次
比較的出力の大きい送液ポンプ４及びオリフィス５が介
装され、これら送液ポンプ４及びオリフィス５によって
液体を一定流量で流通管１に還流させる定流量装置（流
量発生装置）が構成されており、上記送液ポンプ４を作
動することにより、流通管１を流れる液体が分流管３に
その他端側から吸引され、この液体が送液ポンプ４から
オυライス５に比較的高出力で送られ、オリフィス５を
通過することにより一定流量に制御された液体が分流管
３の一端側から流通管１−に還流するようになっている
。A liquid feeding pump 4 and an orifice 5 having a relatively large output are installed in this branching pipe 3 in order from the other end to one end, and these liquid feeding pumps 4 and orifices 5 feed the liquid into the distribution pipe 1 at a constant flow rate. A constant flow rate device (flow rate generation device) for refluxing is configured, and by operating the liquid sending pump 4, the liquid flowing through the distribution pipe 1 is sucked into the branching pipe 3 from the other end, and this liquid is sent. The liquid is sent from the pump 4 to the orifice 5 at a relatively high output, and is controlled at a constant flow rate by passing through the orifice 5, and is returned from one end of the branch pipe 3 to the flow pipe 1-. .
上記流量測定機構を用いて流通管１を流れる液体の流量
を測定する場合、送液ポンプ４を作動させることにより
流通管１を流れる液体の一部を分流管３にその他端側か
ら分流させると共に、この分流した液体の流量Ｑ２をポ
ンプ４及びオリフィス５によって例えば０．５＋Ｑ／ｍ
ｉｎに制御し、分流管３の他端側から流通管１に還流さ
せる。これにより、流通管１と分流管３の他端との連結
部において流通管１を流量Ｑ□で流れる液体と分流管３
を流量Ｑ２で流れる液体とが合流し、この合流した液体
の流量Ｑ、、＋Ｑ２が流量計２で測定される。When measuring the flow rate of the liquid flowing through the distribution pipe 1 using the above-mentioned flow rate measuring mechanism, by operating the liquid sending pump 4, a part of the liquid flowing through the distribution pipe 1 is diverted from the other end to the distribution pipe 3, and at the same time , the flow rate Q2 of this divided liquid is set to, for example, 0.5+Q/m by the pump 4 and the orifice 5.
In is controlled so that the flow is returned to the flow pipe 1 from the other end side of the branch pipe 3. As a result, the liquid flowing through the distribution tube 1 at a flow rate Q□ and the distribution tube 3
and a liquid flowing at a flow rate Q2 are combined, and the flow rate Q, .
即ち、流通管１を流れる液体の流量Ｑ工は０．１〜ｌＱ
／ｍｉｎであるが、この液体に分流管３からの流量Ｑ２
（０、５Ｒ／ ｍｊｎ）を付加すルコトニヨリ、流量
計を通過する液体の流量Ｑ□＋の２を流量計の測定可能
範囲である０、６〜ｌ 、 ５Ｑ／ｍｉｎとすることが
でき、それ故流量計２で流量Ｑ １＋ Ｑ ２を測定し
、この値から分流管３の流量Ｑ２を引くことにより、流
通管１を流れる液体の流ｆｆＱ、を求めることができる
ものである。That is, the flow rate Q of the liquid flowing through the flow pipe 1 is 0.1 to 1Q.
/min, but the flow rate Q2 from the branch pipe 3 to this liquid is
(0,5R/mjn), the flow rate of liquid passing through the flowmeter Q□+2 can be set to 0,6~1,5Q/min, which is the measurable range of the flowmeter, and By measuring the flow rate Q 1 + Q 2 with the faulty flowmeter 2 and subtracting the flow rate Q2 of the branch pipe 3 from this value, the flow rate ffQ of the liquid flowing through the flow pipe 1 can be determined.
従って、上記実施例の流量測定機構によれば、流通管１
を流れる液体の流量Ｑ□が流量計２の測定可能範囲より
低くなる場合であっても、分流管３から流通管１に流量
計２より」１流側において流量Ｑ２の液体を還流させる
ようにしたので、流量計２では測定可能範囲内の流量Ｑ
工＋Ｑ２を計測することができ、その後演算を行うこと
により、流通管１を流れる液体の流量Ｑ工を正確に測定
することができる。Therefore, according to the flow rate measuring mechanism of the above embodiment, the flow pipe 1
Even if the flow rate Q□ of the liquid flowing through the flowmeter 2 is lower than the measurable range of the flowmeter 2, the flow rate Q2 of the liquid is refluxed from the branch pipe 3 to the distribution pipe 1 on the 1st flow side of the flowmeter 2. Therefore, with flowmeter 2, the flow rate Q is within the measurable range.
The flow rate Q of the liquid flowing through the flow pipe 1 can be accurately measured by performing calculations after that.
また、定流量装置として比較的大出力の送液ポンプ４及
びオリフィス５を使用し、上記送液ポンプ４から比較的
高い出力で液体をオリフィス５に通すことにより分流管
３を流れる液体の流量Ｑ２を制御するようにしたので、
この流量Ｑ２を正確に一定にコン１〜ロールして流通管
１の流量Ｑ□に付加することができ、従って流量Ｑ１を
精密に求めることができる。Further, by using a relatively high-output liquid sending pump 4 and an orifice 5 as a constant flow device, and passing liquid from the liquid sending pump 4 through the orifice 5 at a relatively high output, the flow rate Q2 of the liquid flowing through the branch pipe 3 Since we controlled the
This flow rate Q2 can be accurately and constantly controlled and added to the flow rate Q□ of the flow pipe 1, so that the flow rate Q1 can be precisely determined.
なお、上記実施例では流量計２の上流側において流量Ｑ
１に流量Ｑ２を付加し、流量計２において流量Ｑ□＋Ｑ
２を測定するようにしたが、測定すべき流量Ｑ□が流量
計２の測定可能範囲より高くなる場合には、第２図に示
すように分流管３に一端側から他端側にかけて送液ポン
プ４及びオリフィス５を順次介装し、ポンプ４を作動し
て流通管１を流通する液体の一部を流量Ｑ３で分流管３
にその一端側から分流させ、この液体を分流管３の他端
側から流通管１に還流さぜることにより、流量計２を流
れる液体の流量をＱｌ−Ｑ３に制御して流量計２の測定
可能範囲内に入れることができ、この場合は流量Ｈ」の
測定値Ｑ１− Ｑ３と分流管の流量Ｑ３とを足すことに
よって流量Ｑユを正確に測定することができる。In addition, in the above embodiment, the flow rate Q on the upstream side of the flow meter 2
Add flow rate Q2 to 1, and at flow meter 2, the flow rate Q□+Q
However, if the flow rate Q□ to be measured is higher than the measurable range of the flow meter 2, the liquid is sent from one end to the other end of the branch pipe 3 as shown in Fig. 2. A pump 4 and an orifice 5 are sequentially installed, and the pump 4 is operated to transfer a part of the liquid flowing through the distribution pipe 1 to the distribution pipe 3 at a flow rate Q3.
By diverting the liquid from one end of the flowmeter 3 and refluxing the liquid from the other end of the flowmeter 3 to the flow tube 1, the flow rate of the liquid flowing through the flowmeter 2 is controlled to Ql-Q3. In this case, the flow rate Q can be accurately measured by adding the measured value Q1-Q3 of the flow rate H and the flow rate Q3 of the branch pipe.
また、上記実施例では分流管３の定流量装置として送液
ポンプ４及びオリフィス５を使用したが、定量ポンプを
用いてもよい。更に、上記実施例では分流管３から流通
管１に定流量装置によって一部９−
定流量で液体を還流させるようにしたが、送液ポンプ等
の流量発生装置によって不規則な流量で還流される場合
であっても、分流管３に別に流量計を介装し、分流する
液体の流量を測定しつつこの値に基づいて演算を行うこ
とにより、本発明の目的を達成することができる。なお
更に、上記実施例は液体の流量測定機構として構成した
が、気体の流量測定用としてもよく、その他の構成につ
いても本発明の要旨を逸脱しない範囲で適宜変更して差
支えない。Further, in the above embodiment, the liquid feed pump 4 and the orifice 5 are used as constant flow devices for the branch pipe 3, but a metering pump may also be used. Furthermore, in the above embodiment, the liquid is partially refluxed from the branch pipe 3 to the distribution pipe 1 at a constant flow rate using a constant flow device. Even in such a case, the object of the present invention can be achieved by separately installing a flow meter in the diverter pipe 3, measuring the flow rate of the liquid to be diverted, and performing calculations based on this value. Furthermore, although the above embodiment is constructed as a liquid flow rate measuring mechanism, it may also be used for gas flow rate measurement, and other configurations may be modified as appropriate without departing from the gist of the present invention.
ついで、本発明の流量測定機構を用いた分析装置を本発
明の使用例として示す。Next, an analysis device using the flow rate measurement mechanism of the present invention will be shown as an example of use of the present invention.
［使用例］
第３図は上記実施例の流量測定機構を用いたコロイド指
数測定装置を示すものである。[Example of Use] FIG. 3 shows a colloid index measuring device using the flow rate measuring mechanism of the above embodiment.
図中６はコロイド指数４１ｑ定部、１はこの８１！Ｉ定
部６に連結された試料流通管で、この試料流通管には、
その一端部に第１電磁バルブ７が介装された第１試料導
入管８、第２電磁バルブ９が介装された第２試料導入管
１ｏ及び第３電磁バルブ１］−が介装された洗浄水導入
管１２が連結管１３を介してそれぞれ連結されていると
共に、上流側から下流側にかけて第１送液ポンプ１４、
第４電磁バルブ１５、流量調節用滞留タンク１６、流量
計２、プレッシャースイッチ１７及び第５電磁バルブ１
８が順次介装されている。また、本装置においては、第
２送液ポンプ４及びオリフィス５が−に流側から下流側
にかけて順次介装された分流管３の一端が上記タンク１
６の底部に連結されていると共に、この分流管３の他端
が試料流通管１の上記流量計２とプレッシャースイッチ
１７との間に連結されており、これら流量計２、分流管
３、第２送液ポンプ４．オリフィス５によって上記実施
例と同様の本発明流量測定機構が構成されている。In the figure, 6 is the constant part of colloid index 41q, and 1 is this 81! A sample flow tube connected to the I-fixing section 6, which includes:
A first sample introduction tube 8 in which a first electromagnetic valve 7 was interposed, a second sample introduction tube 1o in which a second electromagnetic valve 9 was interposed, and a third electromagnetic valve 1 were interposed at one end thereof. The cleaning water introduction pipes 12 are connected to each other via a connecting pipe 13, and from the upstream side to the downstream side, a first liquid feeding pump 14,
Fourth electromagnetic valve 15, flow rate adjustment retention tank 16, flow meter 2, pressure switch 17, and fifth electromagnetic valve 1
8 are interposed one after another. In addition, in this device, one end of the branch pipe 3 in which the second liquid sending pump 4 and the orifice 5 are sequentially interposed from the downstream side to the tank 1 is connected to the tank 1.
6, and the other end of this branch tube 3 is connected between the flow meter 2 and the pressure switch 17 of the sample flow tube 1. 2. Liquid pump 4. The orifice 5 constitutes the flow rate measuring mechanism of the present invention similar to the above embodiment.
上記流量調節用タンク１６には第１〜３液面検出＠ １
９ ａ 、 １９ ｂ 、 １９ ｃを有するレベルセ
ンサー１９が配設されていると共に、タンク１６の土壁
部には気体用レギュレータ２０及び第６電磁バルブ２１
が上流側から下流側にかけて順次介装されたエアー導入
管２２が連結されている。The flow rate adjustment tank 16 has 1st to 3rd liquid level detection @ 1
A level sensor 19 having sensors 9a, 19b, and 19c is disposed, and a gas regulator 20 and a sixth electromagnetic valve 21 are installed on the earthen wall of the tank 16.
The air introduction pipes 22 are connected to each other in order from the upstream side to the downstream side.
また、２３は上記コロイド指数測定部６に連結された試
料流出管、２４は一端がタンク１６の」二部に連結され
、他端が試料流通管１の第５電磁バルブ１８下流側に連
結された第１排出管、２５はこの第１排出管２４に介装
された第７電磁バルブ、２６は一端がコロイド指数測定
部６に連結され、他端が試料流出管２３に連結された第
２排出管、２７はこの第２排出管２６に介装された第８
電磁バルブ、２８は一端がタンク１６の底部に連結され
、他端が試料流通管２３に連結された第３試料排出管、
２９はこの第３試料排出管２８に介装された第９電磁バ
ルブである。Further, 23 is a sample outflow pipe connected to the colloid index measuring section 6, and 24 is connected at one end to the second part of the tank 16, and at the other end to the downstream side of the fifth electromagnetic valve 18 of the sample flow pipe 1. a first discharge pipe 25, a seventh electromagnetic valve interposed in the first discharge pipe 24, and a second electromagnetic valve 26 connected at one end to the colloid index measuring section 6 and at the other end to the sample outflow pipe 23; The discharge pipe 27 is an eighth discharge pipe interposed in the second discharge pipe 26.
An electromagnetic valve 28 is a third sample discharge pipe whose one end is connected to the bottom of the tank 16 and the other end is connected to the sample flow pipe 23;
Reference numeral 29 denotes a ninth electromagnetic valve interposed in this third sample discharge pipe 28.
ここで、上記コロイド指数測定部は第４図に示す構′成
とされている。即ち、第４図において３０は上記試料流
通管１及び第２排出管２６の端部が連結された上下動可
能な調整ヘッド、３１は調整ヘッド３０下方に配設され
たフィルター載置台、３２はフィルター載置台３１に穿
設されたサンプル通過孔、３３はフィルター載置台３１
下部に連結されたカップ体で、このカップ体３３には上
記試料流出管２３ の端部が連結されている。また、３
４は載置台 ３１−側方に配設されたフィルター上昇機
構を具備するフィルター充填カセット、３５は載置台
３］−他側方に配設されたフィルター降下機構を具備す
るフィルター貯蔵力セッＩ・である。上記充填力セラ１
〜３４には、円形皿状の多孔質枠体３６上に円形フィル
ター用紙３７が配設されてなるフィ ルタ一体３８が充
填されていると共に、載置台 ３１にはフィルター移動
機構が設けられており、充填カセット３４内を上昇した
フィルタ一体はフィルター移動機構によって調整ヘッド
３０下方に移動され、ここで測定に使用された後、更に
貯蔵カセット３５の位置に移動され、貯蔵カセット３５
内を降下して貯蔵されるようになっている。Here, the colloid index measuring section has a configuration shown in FIG. 4. That is, in FIG. 4, 30 is a vertically movable adjustment head to which the ends of the sample flow tube 1 and the second discharge tube 26 are connected, 31 is a filter mounting table disposed below the adjustment head 30, and 32 is a vertically movable adjustment head. A sample passage hole bored in the filter mounting table 31, 33 is the filter mounting table 31
A cup body is connected to the lower part, and the end of the sample outflow tube 23 is connected to this cup body 33. Also, 3
4 is a mounting table; 31 - a filter filling cassette equipped with a filter lifting mechanism arranged on the side; 35 is a mounting table;
3] - a filter storage force set I with a filter lowering mechanism arranged on the other side; The above filling force Cera 1
34 is filled with a filter unit 38 consisting of a circular filter paper 37 arranged on a circular plate-shaped porous frame 36, and the mounting table 31 is provided with a filter moving mechanism. , the filter assembly that has risen inside the filling cassette 34 is moved below the adjustment head 30 by the filter moving mechanism, where it is used for measurement, and then further moved to the storage cassette 35.
It is designed to descend inside and be stored.
上記装置によるコロイド指数の測定は、例えば第１試料
導入管８から試料を導入する場合、下記ステップ１から
４に従って行われる。For example, when a sample is introduced from the first sample introduction tube 8, the measurement of the colloid index by the above-mentioned apparatus is performed according to steps 1 to 4 below.
・ステップ１
測定開始の指示により調整八ツ１く３０が下がり、載置
台３１と調整ヘッド３０との間にフィルター体３８が介
装される。また、第１．４，５．６電磁バルブ７．１５
，１８．２１が開き、第２，３゜７．８．９電磁バルブ
９，１．１，２５，２７゜２９が閉じた状態で、第１，
２送液ポンプコ４゜４が作動する。そして、第１試料導
入管８から試料流通管１に試料液を導入すると、試料液
はタンク１６内に留まる。一方、エアー導入管２２から
レギュレータ２０の作用によって所定圧力（２ｋｇ／ｃ
ｌＴＹ）でタンク１６内に空気が導入され、タンク１６
内の試料液が上記空気の圧力によってタンク１６から流
通管１、調整ヘッド３０を通って所定圧力（２ｋｇ／ｃ
ｎＹ）でフィルター用紙３７を通過した後、枠体３６、
通過孔３２を通ってカップ体３３、流出管２３に流入し
、この時にフィルター用紙３７を通過する試料液の瞬間
流量（Ｖ、）が流量計２で上記実施例で述べたように測
定される。即ち、流通管１を流れる試料液の流量Ｑ□に
分流管３からの流量Ｑｚ （０、５Ｑ／ ｍ１ｎ）を付
加し、Ｑ１＋Ｑ２を流量計で測定した後、この値から＝
１４−
Ｑ２を制御・演算ユニット（図示せず）で減じるもので
ある。そして、この流量（ｖｌ）が制御・演算ユニット
に記憶される。- Step 1: Upon receiving an instruction to start measurement, the adjustment bar 30 is lowered, and the filter body 38 is interposed between the mounting table 31 and the adjustment head 30. In addition, No. 1.4, 5.6 electromagnetic valve 7.15
, 18.21 are open and the second and third degree 7.8.9 electromagnetic valves 9, 1.1, 25, 27 degree 29 are closed.
2. Liquid feed pump 4°4 is activated. When the sample liquid is introduced from the first sample introduction tube 8 to the sample distribution tube 1, the sample liquid remains in the tank 16. On the other hand, a predetermined pressure (2 kg/c
lTY), air is introduced into the tank 16, and the tank 16
The sample liquid in the tank passes through the flow pipe 1 and the adjustment head 30 from the tank 16 under the pressure of the air to a predetermined pressure (2 kg/c
nY) after passing through the filter paper 37, the frame 36,
The instantaneous flow rate (V,) of the sample liquid flowing through the passage hole 32 into the cup body 33 and the outflow pipe 23 and passing through the filter paper 37 at this time is measured by the flowmeter 2 as described in the above embodiment. . That is, after adding the flow rate Qz (0, 5Q/m1n) from the branch tube 3 to the flow rate Q□ of the sample liquid flowing through the flow tube 1, and measuring Q1+Q2 with a flowmeter, from this value =
14- Q2 is subtracted by a control/arithmetic unit (not shown). This flow rate (vl) is then stored in the control/arithmetic unit.
なお、タンク１６内の試料液の液面は液面検出端１９ａ
と１９ｂとの間で管理され、検出端１９ａが液面を検知
すると第４バルブ１５が閉じて試料液のタンク１６への
導入を停止すると共に、検出端１９ｂが液面を検知する
と第４バルブ１５が開いて試料液をタンク１６に導入す
るようになっており、これによりタンク１６内に試料液
が常に滞留するようになっている。Note that the liquid level of the sample liquid in the tank 16 is measured at the liquid level detection end 19a.
When the detection end 19a detects the liquid level, the fourth valve 15 closes and stops introducing the sample liquid into the tank 16, and when the detection end 19b detects the liquid level, the fourth valve 15 closes. 15 is opened to introduce the sample liquid into the tank 16, so that the sample liquid remains in the tank 16 at all times.
・ステップ２
試料液はステップ１と同じ圧力で一定時間（Ｔｏ）続け
て濾過される。これにより、試料液中の微粒子がフィル
ター用紙３７に付着し、その結果フィルター用紙３７の
孔が目詰まりする。- Step 2 The sample liquid is continuously filtered for a certain period of time (To) at the same pressure as in Step 1. As a result, fine particles in the sample liquid adhere to the filter paper 37, and as a result, the holes in the filter paper 37 are clogged.
・ステップ３
ステップ２の後、フィルター用紙３７を通過する試料液
の瞬間流ｉ （Ｖ２）が流量計２で上記と同様に計測さ
れ、この流量（ｖ２）が制御・演算ユニットに記憶され
る。- Step 3 After Step 2, the instantaneous flow i (V2) of the sample liquid passing through the filter paper 37 is measured by the flowmeter 2 in the same manner as described above, and this flow rate (v2) is stored in the control/arithmetic unit.
・ステップ４
コロイド指数（ＳＤＩ）が下記（１）式に従って計算さ
れ、表示、記録される。- Step 4 The colloid index (SDI) is calculated according to the following formula (1), and is displayed and recorded.
なお、測定終了後は、バルブの操作や洗浄水の導入等に
よって排水、洗浄、ブロー等を行うことができる。After the measurement is completed, drainage, cleaning, blowing, etc. can be performed by operating a valve or introducing cleaning water.
上記コロイド指数測定装置においては、測定すべき試料
液のステップ１における流量（ｖｌ）はｌ Ｑ ／ ｍ
１ｎ程度であるが、ステップ３における流量（ｖ２）は
フィルター用紙３７の目詰まりによって０．２Ｒ／ｍｊ
ｎ程度に低下し、流量側２の測定可能範囲０．３〜３
Ｑ ／ ｍｉｎより低くなる。しかし、本装置において
は本発明流量測定機構を採用したので、ステップ３にお
ける流量をも正確に測定できる。In the above colloid index measuring device, the flow rate (vl) of the sample liquid to be measured in step 1 is l Q / m
1n, but the flow rate (v2) in step 3 is 0.2R/mj due to clogging of the filter paper 37.
The measurable range of flow rate side 2 is 0.3 to 3.
Q/min. However, since this apparatus employs the flow rate measuring mechanism of the present invention, the flow rate in step 3 can also be accurately measured.
また、上記装置においては、分流管３の一端をタンク１
６の底壁に連結したことにより、試料液に気泡が含まれ
ている場合でも、気泡がタンク１６内の試料液中を上昇
してタンク１６内上部の気相部に放散されるため、試料
液から気泡を除去して正確な測定を行うことができる。In addition, in the above device, one end of the branch pipe 3 is connected to the tank 1.
6, even if the sample liquid contains air bubbles, the air bubbles will rise in the sample liquid in the tank 16 and dissipate into the gas phase at the upper part of the tank 16. Air bubbles can be removed from the liquid for accurate measurements.
即ち、本装置における流量測定機構は、液体の流通管に
その上流側から下流側にかけて液体を滞留させる滞留タ
ンク及び流量計を順次介装し、かつ分流管の一端を上記
滞留タンクの下部に連結し、他端を上記流通管の流量計
より下流側に連結すると共に、上記流通管から分流管内
にその他端より液体を分流させてこの液体を滞留タンク
に還流させる流量発生装置を該分流管に設けたことによ
り、液体中に気泡が含まれている場合でもこの気泡を良
好に除去できるものである。なお、この場合滞留タンク
の構成に特に限定はなく、液体が滞留し、かつ上部に気
相を有するものであればいずれのものでも使用し得る。That is, the flow rate measuring mechanism in this device is such that a retention tank and a flow meter are sequentially installed in a liquid distribution pipe from the upstream side to the downstream side to retain the liquid, and one end of the branch pipe is connected to the lower part of the retention tank. and the other end of the flow pipe is connected to the downstream side of the flow meter, and a flow rate generating device is connected to the flow pipe, and the flow rate generating device is connected to the flow pipe to flow the liquid from the flow pipe into the flow pipe from the other end and return the liquid to the retention tank. By providing this, even if air bubbles are included in the liquid, the air bubbles can be removed satisfactorily. In this case, there is no particular limitation on the structure of the retention tank, and any tank can be used as long as it retains liquid and has a gas phase in the upper part.
［発明の効果］
以上説明したように、本発明の流量測定機構は、流体の
流通管に流量計を介装し、かつ分流管の一端を上記流通
管の流量計より上流側に連結し、他端を流通管の流量計
より下流側に連結すると共に、上記流通管から分流管内
に流体を分流させてこの流体を流通管に還流させる流量
発生装置を該分流管に設けたことにより、測定すべき流
体の流量が流量計の測定範囲外となる場合でも、正確に
流量を測定することができるものである。[Effects of the Invention] As explained above, the flow rate measurement mechanism of the present invention includes a flow meter interposed in a fluid flow pipe, and one end of a branch pipe connected to the flow meter upstream of the flow pipe, The other end of the flow pipe is connected to the downstream side of the flow meter, and the flow rate generating device is installed in the flow pipe to divert fluid from the flow pipe into the flow pipe and return the fluid to the flow pipe, thereby making it possible to measure the flow rate. Even if the flow rate of the fluid to be measured is outside the measurement range of the flow meter, the flow rate can be accurately measured.
第１図は及び第２図はそれぞれ本発明の一実施例を示す
概略図、第３図は第１図の流量測定機構を用いたコロイ
１く指数測定装置を示す概略図、第４図は同装置のコロ
イド指数測定部を示す拡大断面図、第５図は従来の流量
測定機構を示す概略図である。1 and 2 are schematic diagrams showing one embodiment of the present invention, FIG. 3 is a schematic diagram showing a colloid index measuring device using the flow rate measuring mechanism of FIG. 1, and FIG. FIG. 5 is an enlarged cross-sectional view showing a colloid index measuring section of the device, and a schematic diagram showing a conventional flow rate measuring mechanism.
Claims (1)
を上記流通管の流量計より上流側に連結し、他端を流通
管の流量計より下流側に連結すると共に、上記流通管か
ら分流管内に流体を分流させてこの流体を流通管に還流
させる流量発生装置を該分流管に設けたことを特徴とす
る流量測定機構。 ２、液体の流通管にその上流側から下流側にかけて液体
を滞留させる滞留タンク及び流量計を順次介装し、かつ
分流管の一端を上記滞留タンクの下部に連結し、他端を
上記流通管の流量計より下流側に連結すると共に、上記
流通管から分流管内にその他端より液体を分流させてこ
の液体を滞留タンクに還流させる流量発生装置を該分流
管に設けたことを特徴とする流量測定機構。[Claims] 1. A flow meter is interposed in a fluid flow pipe, and one end of the branch pipe is connected to the upstream side of the flow meter of the flow pipe, and the other end is connected to the downstream side of the flow meter of the flow pipe. 1. A flow rate measuring mechanism, characterized in that the flow rate measuring mechanism is provided in the flow rate generating device connected to the flow rate tube, and configured to divert fluid from the flow rate pipe into the flow rate tube and return the fluid to the flow rate tube. 2. A retention tank and a flow meter for retaining liquid are sequentially installed in the liquid distribution pipe from the upstream side to the downstream side, and one end of the branch pipe is connected to the lower part of the retention tank, and the other end is connected to the distribution pipe. The flow rate is characterized in that the flow rate generating device is connected to the downstream side of the flow meter, and the flow rate generating device is provided in the flow rate generating device for dividing the liquid from the flow pipe into the flow rate pipe from the other end and returning the liquid to the retention tank. Measuring mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13509188A JPH01304318A (en) | 1988-06-01 | 1988-06-01 | Flow rate measuring mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13509188A JPH01304318A (en) | 1988-06-01 | 1988-06-01 | Flow rate measuring mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01304318A true JPH01304318A (en) | 1989-12-07 |
Family
ID=15143626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13509188A Pending JPH01304318A (en) | 1988-06-01 | 1988-06-01 | Flow rate measuring mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01304318A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009028624A (en) * | 2007-07-26 | 2009-02-12 | Teral Inc | Liquid chemical injection apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023665A (en) * | 1973-07-01 | 1975-03-13 | ||
| JPS5057663A (en) * | 1973-09-21 | 1975-05-20 | ||
| JPS5294161A (en) * | 1976-02-03 | 1977-08-08 | Ono Sokki Seisakusho Kk | Flowmeter having wide range of measurement |
-
1988
- 1988-06-01 JP JP13509188A patent/JPH01304318A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023665A (en) * | 1973-07-01 | 1975-03-13 | ||
| JPS5057663A (en) * | 1973-09-21 | 1975-05-20 | ||
| JPS5294161A (en) * | 1976-02-03 | 1977-08-08 | Ono Sokki Seisakusho Kk | Flowmeter having wide range of measurement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009028624A (en) * | 2007-07-26 | 2009-02-12 | Teral Inc | Liquid chemical injection apparatus |
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