JP2794366B2 - Flowmeter - Google Patents
FlowmeterInfo
- Publication number
- JP2794366B2 JP2794366B2 JP27084292A JP27084292A JP2794366B2 JP 2794366 B2 JP2794366 B2 JP 2794366B2 JP 27084292 A JP27084292 A JP 27084292A JP 27084292 A JP27084292 A JP 27084292A JP 2794366 B2 JP2794366 B2 JP 2794366B2
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- pressure
- flow
- measuring means
- pressure control
- 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 - Fee Related
Links
Landscapes
- Measuring Volume Flow (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は流路を流れる流量を測定
することのできる流量計に関し、特に、小流量から大流
量までの広範囲の流量を測定することのできる流量計に
関する。流量計は、各種工場やプラントにおいて、種々
の流体量を測定するために様々な型式のものが数多く使
用されている。しかしながら、どのような型式の流量計
においても大小の差はあっても、測定できる流量範囲、
即ち、最大測定流量と最小測定流量との比（以下レンジ
アビリティと言う）、が限られたものとなってしまって
いた。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow meter capable of measuring a flow rate flowing through a flow path, and more particularly to a flow meter capable of measuring a wide flow rate from a small flow rate to a large flow rate. Many types of flow meters are used in various factories and plants to measure various fluid volumes. However, even if there is a difference in the size of any type of flow meter, the flow rate range that can be measured,
That is, the ratio between the maximum measured flow rate and the minimum measured flow rate (hereinafter referred to as rangeability) has been limited.
【０００２】[0002]
【従来の技術】広範囲の流量を測定するために従来は例
えば特開昭５５−９６４２２号公報に示されているよう
なものが用いられていた。これは、流量測定レンジの異
なる複数の流量計を、並列に配置した複数の流路に取り
付けて、通過流量に応じて流路を電磁弁で切り替えるこ
とにより、小流量から大流量までを測定しようとするも
のである。2. Description of the Related Art Conventionally, for measuring a wide range of flow rates, for example, one disclosed in Japanese Patent Application Laid-Open No. 55-96422 has been used. This is to measure from a small flow rate to a large flow rate by attaching multiple flow meters with different flow rate measurement ranges to multiple flow paths arranged in parallel and switching the flow path with a solenoid valve according to the passing flow rate. It is assumed that.
【０００３】[0003]
【発明が解決しようとする課題】上記従来のものでは、
測定流体量に応じて複数の流量計が必要となる問題があ
った。特に流量が極小流量から極大流量まで変化するよ
うな場合には、数多くの流量計を取り付けなければなら
なくなるのである。１個の流量計で比較的広範囲の流量
を測定することのできる、渦式流量計や容積式流量計等
においても、そのレンジアビリティは同一圧力の場合は
１０対１程度と限られたものとなっており、更に広範囲
の流量を測定するには複数の流量計を必要とするのであ
る。SUMMARY OF THE INVENTION In the above prior art,
There has been a problem that a plurality of flow meters are required depending on the amount of the fluid to be measured. In particular, when the flow rate changes from a minimum flow rate to a maximum flow rate, a large number of flow meters must be installed. Even with a vortex flow meter or a positive displacement flow meter that can measure a relatively wide range of flow rate with one flow meter, the rangeability is limited to about 10 to 1 at the same pressure. Therefore, a plurality of flowmeters are required to measure a wide range of flow rates.
【０００４】従って本発明の技術的課題は、数少ない流
量計により広範囲の流量を測定することができるように
することである。[0004] It is therefore a technical object of the present invention to be able to measure a wide range of flow rates with a few flow meters.
【０００５】[0005]
【課題を解決するための手段】上記の技術的課題を解決
するために講じた本発明の技術的手段は、測定流体の流
れる流路に出口側の流体圧力を所望値に維持する第１の
圧力制御弁を配置し、該第１の圧力制御弁の出口を流量
測定手段の入口と連通し、該流量測定手段の出口側に第
２の圧力制御弁を配置して、上記流量測定手段の出口と
上記第２の圧力制御弁の入口とを連通したものである。Means for Solving the Problems The technical means of the present invention taken in order to solve the above technical problem is a first means for maintaining a fluid pressure at an outlet side in a flow path of a measurement fluid at a desired value. A pressure control valve is disposed, an outlet of the first pressure control valve is communicated with an inlet of the flow rate measuring means, and a second pressure control valve is disposed on an outlet side of the flow rate measuring means. The outlet communicates with the inlet of the second pressure control valve.
【０００６】[0006]
【作用】上記の技術的手段の作用は下記の通りである。
流量測定手段の前後に圧力制御弁を配置して、これらの
圧力制御弁の出口側の流体圧力を所望値に設定すること
により、流量測定手段に作用する入口側と出口側の圧力
差を所望値に設定することができる。流量測定手段に作
用する圧力差を小さくすることにより小流量を測定する
ことができ、圧力差を大きくすることにより大流量を測
定することができる。又、第２の圧力制御弁の出口側の
圧力を一定値に設定することにより、流量計を通過する
流体の圧力を一定値に維持することができ、流量計の出
口側に通常設置されている流体使用機器に一定圧力の流
体を供給することができる。従って、一定圧力の流体を
供給しながら小流量から大流量までを測定することがで
きる。The operation of the above technical means is as follows.
By arranging pressure control valves before and after the flow rate measuring means and setting the fluid pressure on the outlet side of these pressure control valves to a desired value, the pressure difference between the inlet side and the outlet side acting on the flow rate measuring means is desired. Can be set to a value. A small flow rate can be measured by reducing the pressure difference acting on the flow rate measuring means, and a large flow rate can be measured by increasing the pressure difference. In addition, by setting the pressure on the outlet side of the second pressure control valve to a constant value, the pressure of the fluid passing through the flow meter can be maintained at a constant value, and the pressure is normally set at the outlet side of the flow meter. A constant pressure fluid can be supplied to the fluid using equipment. Therefore, it is possible to measure from a small flow rate to a large flow rate while supplying a fluid at a constant pressure.
【０００７】流量測定レンジの異なる流量測定手段を複
数個並列に配置して、差圧に応じて切り替えることによ
って、更に広範囲の流量を測定することもできる。By arranging a plurality of flow rate measuring means having different flow rate measuring ranges in parallel and switching them in accordance with a differential pressure, a flow rate in a wider range can be measured.
【０００８】[0008]
【実施例】上記の技術的手段の具体例を示す実施例を説
明する（図１参照）。流体の流れる流路１に第１の圧力
制御弁２と流量測定手段３，４と第２の圧力制御弁５と
を順次取り付けて流量計を構成する。An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A first pressure control valve 2, flow rate measuring means 3 and 4, and a second pressure control valve 5 are sequentially attached to a flow path 1 through which a fluid flows to form a flow meter.
【０００９】圧力制御弁２，５は、出口側の流体圧力を
制御できるものではどのようなものでも用いることがで
きるが、本実施例においては、自力式の圧力調整弁とし
ての所謂減圧弁を用いた例を示す。減圧弁２，５は、図
示はしていないが、ダイヤフラム等の圧力応動部材の一
面に弁の出口側の流体圧力を受け、圧力応動部材の他面
にコイルバネ等の弾性力を受けて、出口側の流体圧力が
コイルバネ等の弾性力よりも低下すると、弾性力により
主弁が開弁して入口側の高圧流体を出口側に供給するこ
とにより、弁の出口側を所定の圧力に維持するものであ
る。コイルバネ等の弾性力を調節することにより、出口
側の圧力を所望値に設定できるものである。又、圧力制
御弁２，５としては、図示はしていないが、圧力センサ
―と調節計を組み合わせた所謂自動調節弁を用いること
もできる。As the pressure control valves 2 and 5, any type can be used as long as it can control the fluid pressure on the outlet side. In the present embodiment, a so-called pressure reducing valve as a self-acting pressure adjusting valve is used. Here is an example of use. Although not shown, the pressure reducing valves 2 and 5 receive the fluid pressure on the outlet side of the valve on one surface of a pressure responsive member such as a diaphragm, and receive the elastic force of a coil spring or the like on the other surface of the pressure responsive member. When the fluid pressure on the side becomes lower than the elastic force of the coil spring or the like, the main valve opens by the elastic force to supply the high-pressure fluid on the inlet side to the outlet side, thereby maintaining the outlet side of the valve at a predetermined pressure. Things. By adjusting the elastic force of a coil spring or the like, the pressure on the outlet side can be set to a desired value. Although not shown, the pressure control valves 2 and 5 may be so-called automatic control valves in which a pressure sensor and a controller are combined.
【００１０】流量測定手段３，４は流量測定レンジの異
なるものを、開閉弁６，７を介して並列に配置する。流
量測定手段の数は測定する流量範囲により、１個でも良
いし、２個以上であっても良い。流量測定手段３，４
は、従来用いられている流量計、例えば、渦式流量計や
面積式流量計や超音波式あるいは電磁式流量計等、を用
いることができる。The flow rate measuring means 3 and 4 have different flow rate measuring ranges arranged in parallel via the on-off valves 6 and 7. The number of flow rate measuring means may be one or two or more depending on the flow rate range to be measured. Flow measurement means 3, 4
A conventional flowmeter, for example, a vortex flowmeter, an area flowmeter, an ultrasonic or electromagnetic flowmeter can be used.
【００１１】流量測定手段３，４として例えば渦式流量
計を用いて流量を測定する場合、流量測定手段３を小流
量用とし流量測定手段４を大流量用として、第２の圧力
制御弁５で図示しない流体使用機器に供給する流体圧力
となるように出口側の圧力を所定値に設定する。第２の
圧力制御弁５の出口側を例えば２キロに設定した場合、
第１の圧力制御弁２の設定圧力を例えば１６キロから３
キロの範囲で適宜設定することにより、１６キロの場合
は開閉弁６を閉じ開閉弁７を開けて流量測定手段４を用
いると、流量測定手段４には１４キロの差圧が作用する
こととなり、大流量を測定することができる。又、第１
の圧力制御弁２の設定圧力が３キロの場合は、開閉弁７
を閉じ開閉弁６を開けて流量測定手段３を用いることに
より、差圧が１キロとなり、小流量を測定することがで
きる。この場合いずれの場合においても、第２の圧力制
御弁５からは２キロの圧力の流体が図示しない流体使用
機器に供給される。When the flow rate is measured using, for example, a vortex flow meter as the flow rate measuring means 3 and 4, the flow rate measuring means 3 is used for a small flow rate, the flow rate measuring means 4 is used for a large flow rate, and the second pressure control valve 5 is used. The pressure on the outlet side is set to a predetermined value so as to be the fluid pressure supplied to the fluid using device (not shown). When the outlet side of the second pressure control valve 5 is set to, for example, 2 km,
The set pressure of the first pressure control valve 2 is, for example, from 16 kg to 3
If the flow rate measuring means 4 is used by closing the on-off valve 6 and opening the on-off valve 7 in the case of 16 km by setting the flow rate appropriately in the range of kilometers, the differential pressure of 14 kg acts on the flow rate measuring means 4. , Large flow rates can be measured. Also, the first
When the set pressure of the pressure control valve 2 is 3 kg, the on-off valve 7
Is closed and the on-off valve 6 is opened to use the flow rate measuring means 3, the differential pressure becomes 1 km, and a small flow rate can be measured. In any case, a fluid having a pressure of 2 kg is supplied from the second pressure control valve 5 to a fluid using device (not shown).
【００１２】[0012]
【発明の効果】本発明は下記の特有の効果を生じる。上
記のように本発明によれば、流量測定手段の前後に圧力
制御弁を配置して、流量測定手段に作用する圧力差を調
節することにより、小流量から大流量までの広範囲の流
量を測定することができると共に、流量計の出口側に一
定圧力の流体を供給することができる。The present invention has the following specific effects. As described above, according to the present invention, a pressure control valve is arranged before and after the flow measuring means, and a pressure difference acting on the flow measuring means is adjusted to measure a wide flow rate from a small flow rate to a large flow rate. And a constant pressure fluid can be supplied to the outlet side of the flow meter.
【図１】本発明の流量計の実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment of a flow meter according to the present invention.
１ 流路 ２ 第１の圧力制御弁 ３，４ 流量測定手段 ５ 第２の圧力制御弁 ６，７ 開閉弁 DESCRIPTION OF SYMBOLS 1 Flow path 2 1st pressure control valve 3, 4 Flow rate measuring means 5 2nd pressure control valve 6, 7 On-off valve
Claims (1)
力を所望値に維持する第１の圧力制御弁を配置し、該第
１の圧力制御弁の出口を流量測定手段の入口と連通し、
該流量測定手段の出口側に第２の圧力制御弁を配置し
て、上記流量測定手段の出口と上記第２の圧力制御弁の
入口とを連通したことを特徴とする流量計。1. A first pressure control valve for maintaining a fluid pressure on an outlet side at a desired value in a flow path of a measurement fluid, and an outlet of the first pressure control valve communicates with an inlet of a flow rate measuring means. And
A flowmeter, wherein a second pressure control valve is arranged on an outlet side of the flow rate measuring means, and an outlet of the flow rate measuring means and an inlet of the second pressure control valve are communicated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27084292A JP2794366B2 (en) | 1992-09-14 | 1992-09-14 | Flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27084292A JP2794366B2 (en) | 1992-09-14 | 1992-09-14 | Flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0694502A JPH0694502A (en) | 1994-04-05 |
| JP2794366B2 true JP2794366B2 (en) | 1998-09-03 |
Family
ID=17491761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27084292A Expired - Fee Related JP2794366B2 (en) | 1992-09-14 | 1992-09-14 | Flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2794366B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007102754A (en) * | 2005-09-09 | 2007-04-19 | Advance Denki Kogyo Kk | Flow controller |
| KR101273776B1 (en) * | 2011-09-01 | 2013-06-12 | 한국수자원공사 | A compound flow measuring apparatus |
| RU2020120806A (en) | 2015-09-28 | 2020-07-08 | ПРЕСИЖН ПЛЭНТИНГ ЭлЭлСи | SYSTEMS AND DEVICES FOR MANAGING AND MONITORING THE APPLICATION OF LIQUIDS IN AGRICULTURAL FIELDS |
-
1992
- 1992-09-14 JP JP27084292A patent/JP2794366B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0694502A (en) | 1994-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5146941A (en) | High turndown mass flow control system for regulating gas flow to a variable pressure system | |
| CA1132358A (en) | Apparatus and method for determining the characteristic of a flowmeter | |
| EP1269280B1 (en) | Pressure independent control valve | |
| CN106233061A (en) | For the real-time system monitoring the flow through mass flow controller and method | |
| US20050039797A1 (en) | Pressure independent control valve | |
| JP3865813B2 (en) | Fluid mixing device | |
| US2916047A (en) | Automatic regulation of the rate of flow of a fluid through a pipe or the like | |
| JP2794366B2 (en) | Flowmeter | |
| US5088322A (en) | Extended range flow meter | |
| EP0896177B1 (en) | Fluid control device | |
| JP2000283810A (en) | Differential pressure type flowmeter | |
| JP2022524943A (en) | A measuring system that measures mass flow rate, density, temperature and / or flow velocity | |
| CA2463242C (en) | Purge type vortex flowmeter | |
| US4875932A (en) | Apparatus for measuring a flow rate | |
| JP3818547B2 (en) | Mass flow controller | |
| US5269334A (en) | Fluid flow control system | |
| JP3623125B2 (en) | Flow rate measuring method and flow rate measuring device | |
| AU628296B2 (en) | Beverage dispensing valve | |
| US11959788B2 (en) | Wide range flow measuring device having two Coriolis meters arranged in series and a bypass line to bypass the second Coriolis meter | |
| JP2860606B2 (en) | Self-powered pressure regulating valve device | |
| JP3295232B2 (en) | Fluidic gas meter | |
| JP2002340632A (en) | Flowmeter | |
| JPS61202120A (en) | Flow rate measuring apparatus | |
| JP3297507B2 (en) | Flow measurement device | |
| JPS62175619A (en) | Fluidic flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080626 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080626 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090626 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 11 Free format text: PAYMENT UNTIL: 20090626 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 12 Free format text: PAYMENT UNTIL: 20100626 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 13 Free format text: PAYMENT UNTIL: 20110626 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110626 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120626 Year of fee payment: 14 |
|
| LAPS | Cancellation because of no payment of annual fees |