JPH0238817A - Flowmeter using bellows - Google Patents
Flowmeter using bellowsInfo
- Publication number
- JPH0238817A JPH0238817A JP18692088A JP18692088A JPH0238817A JP H0238817 A JPH0238817 A JP H0238817A JP 18692088 A JP18692088 A JP 18692088A JP 18692088 A JP18692088 A JP 18692088A JP H0238817 A JPH0238817 A JP H0238817A
- Authority
- JP
- Japan
- Prior art keywords
- bellows
- pressure
- contraction
- curved
- extension
- 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
- 230000008602 contraction Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 3
- 238000007747 plating Methods 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000004070 electrodeposition Methods 0.000 abstract 3
- 230000005611 electricity Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 208000034699 Vitreous floaters Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 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、Ｉｌｔ路内の圧力によって伸縮するベローズ
を利用して波Ｉヨを計測する流量計に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a flowmeter that measures waves I and Y using a bellows that expands and contracts depending on the pressure in the Ilt path.
従来、ｔＩｔｔ計の一種としてたとえば＋５２図に示す
ように、流路（＋０１）の中途にオリフィス（１０２）
を設け、１憤オリフイス（＋０２）の」二りＩｔ側（１
０１ａ）ト下流側（ＩＯｌｂ）を結ぶバイパス流路（１
０３）の中途に、透明なテーバ管（＋０５）と、その内
周空間（１０８）に遊挿した浮遊子（＋０７）からなる
計ｌＪ４部（＋０４）を接続したものがある。Conventionally, as a type of tItt meter, for example, as shown in Figure +52, an orifice (102) is installed in the middle of the flow path (+01).
, and the 2 IT side (1
01a) Bypass flow path (1
In the middle of 03), a total of 4 parts (+04) consisting of a transparent Taber tube (+05) and a floater (+07) loosely inserted into its inner peripheral space (108) are connected.
すなわちこの流量計は、オリフィス（＋０５）のと流側
（１０１ａ）と下流側（１０１ｂ）間テ、魔路（ｌｏｔ
）内の流量に応じた差圧（上流側（Ｉｏｔａ）が下流側
（ｌｏ＋ｂ）よりも高圧となる）が発生し、該差圧によ
って生じるバイパスＩ１１．路（ＩＢ）内の流量に応じ
てテーパ管（＋０５）内で上ｒする浮遊７− Ｈａ？）
の位置を目測することによって、流路（＋０１）の全流
量を計測することがでざるものである。In other words, this flowmeter has a lot
) is generated (the upstream side (Iota) is higher pressure than the downstream side (lo+b)), and the bypass I11. 7- Ha? )
It is impossible to measure the total flow rate of the flow path (+01) by visually measuring the position of the flow path (+01).
しかし、−ヒ記したようなｔｉｉ、に計では、ｆＩＬ路
（＋０１）内の流量が小さくなり、これに伴なってオリ
フィス（＋０５）の両側の差圧が一定値以下になると、
浮遊子（＋０７）が完全に沈降してしまうため、少流曖
では計測が困難であった。However, in the tii meter as described in (b), when the flow rate in the fIL path (+01) decreases and the differential pressure on both sides of the orifice (+05) falls below a certain value,
Because the floaters (+07) completely settled, it was difficult to measure them in low-flow conditions.
本発明は、このような問題に鑑み、少流量を計測を可能
とするｔｉｉ、Ｆ＆計を提供せんとするものである。In view of such problems, the present invention aims to provide a tii, F& meter that is capable of measuring small flow rates.
すなわち本発明に係るベローズを用いた流量計は、内部
かへローズで２室に気密区画されたシリンダと、前記ベ
ローズの伸縮量を検出する検出手段とを有し、前記シリ
ンダ内におけるベローズ内部室およびベローズ外部室は
、流路中途に接続された曲り管のカーブ内側壁およびカ
ーブ外側壁に開口した１対の導圧用小孔に、それぞれ連
通していることを特徴とするものであって、前記ベロー
ズとしては電着ベローズを用いるのが好適である。That is, the flowmeter using a bellows according to the present invention has a cylinder airtightly partitioned into two chambers by an internal bellows, and a detection means for detecting the amount of expansion and contraction of the bellows, and the bellows internal chamber in the cylinder. and the bellows external chamber is characterized in that it communicates with a pair of small pressure guiding holes opened in the curved inner wall and curved outer wall of the curved pipe connected in the middle of the flow path, As the bellows, it is preferable to use an electrodeposited bellows.
曲り管内での流体の流れを考えると、慣性によって常に
直ｌＩＭ動をしようとする流体の流れは１曲り管の内壁
によって強制的に曲げられるために、流体は該曲り管内
におけるカーブ外側へ向けて押し付けられ、したがって
、曲り管内にはカーブ外側が高圧、カーブ内側が低圧と
なるような差圧が生じる。そしてこの差圧の大きさは、
前記慣性の大きさすなわち流量の大きさに応じて変化す
る。Considering the flow of fluid in a curved pipe, the flow of fluid that always tries to move in a straight line due to inertia is forced to bend by the inner wall of the curved pipe, so the fluid moves toward the outside of the curve in the curved pipe. Therefore, a pressure difference is generated in the curved pipe such that high pressure is on the outside of the curve and low pressure is on the inside of the curve. And the magnitude of this differential pressure is
It changes depending on the magnitude of the inertia, that is, the magnitude of the flow rate.
本発明はこの点に着眼し、僅かな圧力をも感知して伸縮
する電着ベローズ等の高感度のベローズを利用し、前記
差圧を計測することにより流量を計測しようとするもの
で、すなわち曲り管内におけるカーブ内側部分およびカ
ーブ外側部分の圧力は、１対の導圧用小孔からシリンダ
内におけるベローズの内部室および外部室にそれぞれ導
…されており、したがって該両室の差圧に応じた前記ベ
ローズの伸ｍｉを、適当な検出手段によってセンシング
すれば、その検出結果から、流体の流量を求めることが
できる。The present invention focuses on this point and attempts to measure the flow rate by measuring the differential pressure using a highly sensitive bellows such as an electrodeposited bellows that expands and contracts by sensing even the slightest pressure. The pressure on the inside of the curve and on the outside of the curve in the bent pipe is led to the internal and external chambers of the bellows in the cylinder through a pair of pressure guiding small holes, respectively, and therefore the pressure is proportional to the pressure difference between the two chambers. If the extension mi of the bellows is sensed by an appropriate detection means, the flow rate of the fluid can be determined from the detection result.
次に、本発明に係る流量計の一実施例を、７ｔ４１図に
基いて説明する。Next, one embodiment of the flowmeter according to the present invention will be described based on Fig. 7t41.
図において、（１）はシリンダ、（５）は該シリンダ（
１）の一端（２）内壁に固着されシリンダ（１）内を２
室（８）（７）に気密区画している電着ベローズ、（８
）はシリンダ（１）内におけるベローズ外部室（７）に
あって、Ｍ１着ベローズ（５）を常時収縮方向に押圧し
ているバネ部材である。（９）は電着ベローズ（５）の
伸縮量検出手段としての差動トランスで、シリンダ（１
）の他端（３）側に形成された小径部（４）の外周に設
けた一次コイル（１０ａ）および二次コイル（１０ｂ）
（１０ｃ）と、前記小径ｆｊｌ！（４）内周に軸方向移
動自在に設けられロッド（１２）を介して電着ベローズ
（５）の自由端部に連結されたコア（ＩＩ）とからなる
。In the figure, (1) is a cylinder, and (5) is the cylinder (
1) One end (2) is fixed to the inner wall and runs inside the cylinder (1).
Electroplated bellows airtightly partitioned into chambers (8) and (7), (8
) is a spring member that is located in the bellows external chamber (7) in the cylinder (1) and constantly presses the M1 fitted bellows (5) in the contraction direction. (9) is a differential transformer as a means for detecting the amount of expansion and contraction of the electrodeposited bellows (5);
) A primary coil (10a) and a secondary coil (10b) provided on the outer periphery of the small diameter portion (4) formed on the other end (3) side.
(10c) and the small diameter fjl! (4) It consists of a core (II) provided on the inner periphery so as to be freely movable in the axial direction and connected to the free end of the electrodeposited bellows (5) via a rod (12).
一方、（１５）は図示しない流路の中途に接続された曲
り管で１円弧状をなすように９０’カーブしており、鎖
部り管（１５）の長さ方向中央部におけるカーブ外側壁
（＋８ａ）（曲り管（＋５）のなす円弧の中心に対して
最も外側となる壁面）およびカーブ内側壁（＋８ｂ）（
曲り管（１５）のなす内置の中心に対して最も内側とな
る中面）には導圧用小孔（１７）（＋８）が開口され、
′ｆ−径方向に対向している。そしてカーブ外側壁（Ｉ
Ｉ３ａ）の導圧用小孔（１７）は、図中−点鎖線で簡略
化して示す導圧路（ＩＳ）を介して、シリンダ（１）の
一端（２）に開設した人力孔（１３）に接続され、シリ
ンダ（１）内におけるベローズ内部室（８）と連通して
いるとともに、カーブ内側壁（＋８ｂ）の導圧用小孔（
１８）は、いま１つの導圧路（２０）を介して、シリン
ダ（１）の他端（３）に開設した入力孔（目）に接続さ
れ、シリンダ（１）内におけるベローズ外部室（７）と
連通している。On the other hand, (15) is a bent pipe connected to the middle of the flow path (not shown), which is curved 90' to form a circular arc, and the curved outer wall at the longitudinal center of the chain part pipe (15). (+8a) (the outermost wall surface with respect to the center of the arc formed by the curved pipe (+5)) and the curved inner wall (+8b) (
A pressure guiding small hole (17) (+8) is opened in the innermost surface of the bent pipe (15) with respect to the center of the interior.
'f - radially opposed. and the curved outer wall (I
The pressure impulse small hole (17) of I3a) is connected to the manual hole (13) opened at one end (2) of the cylinder (1) via the pressure impulse path (IS), which is shown simplified by the dotted chain line in the figure. It is connected to the bellows internal chamber (8) in the cylinder (1) and communicates with the small pressure guiding hole (+8b) in the curved inner wall (+8b).
18) is connected to the input hole (eye) opened at the other end (3) of the cylinder (1) via another pressure path (20), and is connected to the bellows external chamber (7) in the cylinder (1). ) is in communication.
以上の構成において１曲り管（１５）内の流路（２１）
を、大矢印（Ｘ）方向に向かって流体が流れると、この
流体は自らの慣性により、カーブ外側へ押し付けられる
ようになり、このため１曲り？ （１５）内の流路（２
１）では、カーブ外側部分（２１ａ）が圧縮を受けて高
圧になり、逆にカーブ内側部分（２１ｂ）はｖ１畳され
て低圧になるといった現象が起こる。モして該両部会（
２１ａ）（２１ｂ）の圧力は２導圧用小孔（１７）（＋
８）から導圧路（＋９）（２０）を介してベローズ内部
室（６）およびベローズ外部室（７）へ人力されている
ため１曲り管（１５）内の流体流量に応じて変化する前
記両部会（２１δ）（２１ｂ）の差圧、すなわちベロー
ズ内部室（６）とベローズ外部室（７）の差圧によって
電着ベローズ（５）が伸縮する。電着ベローズ（５）は
、一種のメツキ法によって成形された板厚がきわめて薄
い蛇腹状の部材で、ｖ１少な荷重（差圧）を高感度で感
知して伸縮量に変換することができる。差動トランス（
９）はこの伸縮量を電気ψに変換するもので、すなわち
−次コイル（ＩＯａ）には図示しないＴｖ源部から交流
が印加されており、その両側のニー次コイル（ｊｏｂ）
（ＩＯｃ）には。In the above configuration, the flow path (21) in one bent pipe (15)
When the fluid flows in the direction of the large arrow (X), the fluid will be pushed to the outside of the curve due to its own inertia, resulting in one curve? (15) Flow path (2
In 1), a phenomenon occurs in which the outside portion of the curve (21a) is compressed and becomes high pressure, and conversely, the inside portion of the curve (21b) is compressed by v1 and becomes low pressure. Both relevant subcommittees (
The pressure of 21a) (21b) is 2 pressure small holes (17) (+
8) to the bellows internal chamber (6) and the bellows external chamber (7) via the pressure paths (+9) and (20), the above-mentioned pressure changes depending on the fluid flow rate in the bent pipe (15). The electrodeposited bellows (5) expands and contracts due to the differential pressure between the two sections (21δ) (21b), that is, the differential pressure between the bellows internal chamber (6) and the bellows external chamber (7). The electrodeposited bellows (5) is an extremely thin bellows-shaped member formed by a type of plating method, and can sense a small load (differential pressure) with high sensitivity and convert it into an amount of expansion and contraction. Differential transformer (
9) converts this amount of expansion and contraction into electric ψ, that is, alternating current is applied to the secondary coil (IOa) from a Tv source (not shown), and the secondary coils (job) on both sides of the primary coil (IOa)
(IOc).
’ｉｔｆ Ｒベローズ（５）の伸縮とともに移動するコ
ア（１１）の位置に応じて異なる誘導電圧が発生し、そ
の差電圧が図示しない整流回路等によって平ＩＷな；α
魔に変換され、出力される。'itf Different induced voltages are generated depending on the position of the core (11) that moves with the expansion and contraction of the R bellows (5), and the differential voltage is flattened by a rectifier circuit (not shown), etc.
It is converted into demons and output.
Ｌ記実施例によると、？を着ベローズ（５）は、曲り！
（＋５）内におけるカーブ外側部分（２１ａ）とカー
ブ内側部分（２１ｂ）の間の僅かな差圧を感知して伸縮
するため、この伸縮量に応じた前記差動トランス（９）
の７１１力信号から、微少流量を計測することができる
。また、−１ｒｔ、ｓベローズ（５）や、これを内蔵し
たシリンダ（１）、差動トランス（９）は非常に小さな
ものでよく、シたがって、テーノく管等を用いた従来の
流量計に比較して小型にすることができる。According to Example L? The bellows (5) are bent!
(+5) The differential transformer (9) expands and contracts by sensing a slight pressure difference between the curve outside portion (21a) and the curve inside portion (21b) within the curve.
The minute flow rate can be measured from the 711 force signal. In addition, the -1rt, s bellows (5), the cylinder containing it (1), and the differential transformer (9) can be very small, and therefore, conventional flowmeters using It can be made smaller compared to.
なお、電着ベローズ（５）の伸縮量を検出する検出手段
としては、差動トランス（９）のほか、たとえば可動側
（電着ベローズ（５）側）に磁石を設け、固定（Ｉｌｌ
（シリンダ（１）側）に磁気抵抗素子を設ける等１種々
のものが考えられる。In addition to the differential transformer (9), as a detection means for detecting the amount of expansion and contraction of the electrodeposited bellows (5), for example, a magnet is provided on the movable side (electroplated bellows (5) side),
Various methods are possible, such as providing a magnetic resistance element on the cylinder (1) side.
以上説明したとおり、本発明の流隈計は、流体！ｆ＆を
、流体が曲り管を通過する際にそのカーブ外側と内側間
で生じる差圧として促え、これを電着ベローズ等の高感
度のべａ−ズおよび該ベローズの伸縮場を電気的に検出
する手段によって計測する点に特徴を有し、微少な流酸
の計測が可能となるものである。As explained above, the flow meter of the present invention uses fluid! f& can be expressed as the differential pressure generated between the outside and inside of the curve when fluid passes through the curved pipe, and this can be expressed by using a highly sensitive bellows such as an electrodeposited bellows and the expansion/contraction field of the bellows electrically. It is characterized by the fact that it measures by means of detection, making it possible to measure minute amounts of hydrochloric acid.
第１図は本発明の一実施例を示す概略ａ成因。
第２図は従来例を承す概略構成図である。
（ＩＯａ）−次コイル （１０ｂ）（１０ｃ）二次フ
ィル（＋１）コア （＋５）曲り管 （＋８ａ）カ
ーブ外側壁（１６ｂ）カーブ内側壁 （＋７）（Ｉｌ
＋）導圧用小孔（１９）（２０）導圧路
特許出願人 イーグルＴ業株式会社FIG. 1 is a schematic diagram showing an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of a conventional example. (IOa) - Secondary coil (10b) (10c) Secondary fill (+1) Core (+5) Bent pipe (+8a) Curve outer wall (16b) Curve inner wall (+7) (Il
+) Small holes for pressure conduction (19) (20) Pressure conduction path Patent applicant Eagle T Gyo Co., Ltd.
Claims (1)
、前記ベローズの伸縮量を検出する検出手段とを有し、
前記シリンダ内におけるベローズ内部室およびベローズ
外部室は、流路中途に接続された曲り管のカーブ内側壁
およびカーブ外側壁に開口した１対の導圧用小孔に、そ
れぞれ連通していることを特徴とするベローズを用いた
流量計。 ２、請求項１において、前記ベローズは電着ベローズで
あることを特徴とするベローズを用いた流量計。[Claims] 1. A cylinder having an interior hermetically divided into two chambers by a bellows, and a detection means for detecting the amount of expansion and contraction of the bellows,
The bellows internal chamber and the bellows external chamber in the cylinder communicate with a pair of small pressure guiding holes opened in the curved inner wall and curved outer wall of the curved pipe connected in the middle of the flow path, respectively. A flowmeter using a bellows. 2. A flowmeter using a bellows according to claim 1, wherein the bellows is an electrodeposited bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18692088A JPH0238817A (en) | 1988-07-28 | 1988-07-28 | Flowmeter using bellows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18692088A JPH0238817A (en) | 1988-07-28 | 1988-07-28 | Flowmeter using bellows |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0238817A true JPH0238817A (en) | 1990-02-08 |
Family
ID=16197014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18692088A Pending JPH0238817A (en) | 1988-07-28 | 1988-07-28 | Flowmeter using bellows |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0238817A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996024028A1 (en) * | 1995-02-03 | 1996-08-08 | Lockheed Idaho Technologies Company | System and method for measuring and controlling bidirectional multi-phase fluid flow in a conduit |
| US5905208A (en) * | 1995-02-03 | 1999-05-18 | Lockheed Martin Idhao Technologies Company | System and method measuring fluid flow in a conduit |
| WO2016004684A1 (en) * | 2014-07-05 | 2016-01-14 | 湖北泽越电子科技有限公司 | Differential pressure type bend pipe flow meter |
-
1988
- 1988-07-28 JP JP18692088A patent/JPH0238817A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996024028A1 (en) * | 1995-02-03 | 1996-08-08 | Lockheed Idaho Technologies Company | System and method for measuring and controlling bidirectional multi-phase fluid flow in a conduit |
| US5717146A (en) * | 1995-02-03 | 1998-02-10 | Lockheed Martin Idaho Technologies Company | Device and method for measuring multi-phase fluid flow in a conduit having an abrupt gradual bend |
| US5827977A (en) * | 1995-02-03 | 1998-10-27 | Lockheed Martin Idaho Technologies Company | Device and method for measuring multi-phase fluid flow and density of fluid in a conduit having a gradual bend |
| US5834659A (en) * | 1995-02-03 | 1998-11-10 | Lockheed Martin Idaho Technologies Company | Device and method for measuring fluid flow in a conduit having a gradual bend |
| US5886267A (en) * | 1995-02-03 | 1999-03-23 | Lockheed Martin Idaho Technologies Company | System and method for bidirectional flow and controlling fluid flow in a conduit |
| US5905208A (en) * | 1995-02-03 | 1999-05-18 | Lockheed Martin Idhao Technologies Company | System and method measuring fluid flow in a conduit |
| WO2016004684A1 (en) * | 2014-07-05 | 2016-01-14 | 湖北泽越电子科技有限公司 | Differential pressure type bend pipe flow meter |
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