JPS6040914A - Vortex flowmeter - Google Patents

Vortex flowmeter

Info

Publication number
JPS6040914A
JPS6040914A JP58148928A JP14892883A JPS6040914A JP S6040914 A JPS6040914 A JP S6040914A JP 58148928 A JP58148928 A JP 58148928A JP 14892883 A JP14892883 A JP 14892883A JP S6040914 A JPS6040914 A JP S6040914A
Authority
JP
Japan
Prior art keywords
vortex
hollow body
fluctuation
fluid
pressure
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.)
Granted
Application number
JP58148928A
Other languages
Japanese (ja)
Other versions
JPH038695B2 (en
Inventor
Katsuo Misumi
勝夫 三角
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oval Kiki Kogyo KK
Oval Engineering Co Ltd
Original Assignee
Oval Kiki Kogyo KK
Oval Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oval Kiki Kogyo KK, Oval Engineering Co Ltd filed Critical Oval Kiki Kogyo KK
Priority to JP58148928A priority Critical patent/JPS6040914A/en
Priority to US06/637,924 priority patent/US4683760A/en
Priority to EP84109373A priority patent/EP0137945B1/en
Priority to DE8484109373T priority patent/DE3476449D1/en
Priority to CA000461004A priority patent/CA1228752A/en
Priority to KR1019840004876A priority patent/KR890004447B1/en
Publication of JPS6040914A publication Critical patent/JPS6040914A/en
Publication of JPH038695B2 publication Critical patent/JPH038695B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
    • G01F1/325—Means for detecting quantities used as proxy variables for swirl
    • G01F1/3282—Means for detecting quantities used as proxy variables for swirl for detecting variations in infrasonic, sonic or ultrasonic waves, due to modulation by passing through the swirling fluid

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To measure Karman vortex accurately without the effect of disturbance, by measuring the fluctuation of pressure in a hollow body, which is vertically provided in a pipe at the rear of a vortex yielding body, through ultrasonic waves. CONSTITUTION:The fluctuation in pressure of a fluid to be measured caused by Karman vortex, which is yielded by a vortex yielding body 2, is introduced into a hollow body 4, which is vertically provided in a flow pipe 1, through holes A and B. Then the fluctuation in pressure or the fluctuation in fluid is yielded. The fluctuation is detected by an ultrasonic wave transmitter 5 and an ultrasonic wave receiver 6. Thus the Karman vortex is accurately measured without receiving the effect of disturbance.

Description

【発明の詳細な説明】 蕉１１年号一 本発明は、流体中に配設された渦発生体により発生され
るカルマン渦を利用した渦流量計に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vortex flow meter that utilizes a Karman vortex generated by a vortex generator disposed in a fluid.

従３１Ｅｔｉ権 周知のように、流体中に柱状の渦発生体を挿入すると、
該渦発生体の両側面で流れが剥離し、該渦発生体の下流
側に交互に規則的な渦すなわちカルマン渦が発生する。As is well known in the Article 31 Eti, when a columnar vortex generator is inserted into a fluid,
The flow separates on both sides of the vortex generator, and regular vortices, that is, Karman vortices, are generated alternately on the downstream side of the vortex generator.

このカルマン渦の発生数は、流体又は流量に比例してい
るところから、このカルマン渦の数を計数することによ
り、流量を計測することができる。而して、従来は、こ
のカルマン渦を躬数するために、該カルマン渦を横切っ
て超音波を送受信し、該超音波の周波数変調或いは位相
変調を検出するようにしていたが、超音波は拡散するの
で受信４号レベルが小さく、更に渦近傍流れが乱れてぃ
゛るため、これとの干渉によりＳ／Ｎが低下し、これが
計測誤差をもたらすことがあった。Since the number of Karman vortices generated is proportional to the fluid or flow rate, the flow rate can be measured by counting the number of Karman vortices. Conventionally, in order to detect this Karman vortex, ultrasonic waves were transmitted and received across the Karman vortex and the frequency modulation or phase modulation of the ultrasonic waves was detected. Because of the diffusion, the level of the received signal No. 4 is low, and since the flow near the vortex is turbulent, the S/N ratio decreases due to interference with this, which may lead to measurement errors.

目　的 本発明は、上述のごとき実情に鑑みてなされたもので、
過変動差圧による流れを整流し、超音波の拡散をなくし
外乱の影響を受けることなく、正確にカルマン渦を計測
し得るようにした渦流量計に関する。Purpose The present invention was made in view of the above-mentioned circumstances.
This invention relates to a vortex flowmeter that rectifies the flow due to excessively fluctuating differential pressure, eliminates the diffusion of ultrasonic waves, and makes it possible to accurately measure Karman vortices without being affected by disturbances.

構　成 第１図は、本発明による渦流量計の一実施例を説明する
ための要部断面構成図、第２図は、第１図のｕ−ｎ線断
面図で、図中、ｌは被測定流体が流れている流路管、２
は周知の渦発生体、３ａ。Structure FIG. 1 is a sectional configuration diagram of essential parts for explaining one embodiment of the vortex flowmeter according to the present invention, and FIG. 2 is a sectional diagram taken along line u-n in FIG. A flow pipe through which the fluid to be measured flows, 2
is a well-known vortex generator, 3a.

３ｂは該渦発生体によって発生されたカルマン渦、４は
本発明によって設けられた中空体で、該中空体４は前記
渦発生体２の下流側に該渦発生体２と交差する方向に配
設された中空体である。而して、本発明においては、前
記中空体４は流路管１の管体壁に設けられた孔Ａを貫通
して配設さｉｔ、該流路管１の外部において孔Ｂが設け
られている。従って、本発明によると、渦発生体２によ
って発生されたカルマン渦による被測定流体の圧力変動
は孔Ａ及びＢを通して中空体４内に導入され、該中空体
内の圧力変動又は該圧力変動による流体変動が例えば超
音波発信器５及び超音波受信器６によって検出され、そ
れによって、被測定流体の流速又は流量が計測される。3b is a Karman vortex generated by the vortex generator, 4 is a hollow body provided according to the present invention, and the hollow body 4 is disposed downstream of the vortex generator 2 in a direction intersecting with the vortex generator 2. It is a hollow body. According to the present invention, the hollow body 4 is disposed so as to pass through the hole A provided in the wall of the flow pipe 1, and the hole B is provided outside the flow pipe 1. ing. Therefore, according to the present invention, the pressure fluctuation of the measured fluid due to the Karman vortex generated by the vortex generator 2 is introduced into the hollow body 4 through the holes A and B, and the pressure fluctuation within the hollow body or the fluid due to the pressure fluctuation is introduced into the hollow body 4 through the holes A and B. The fluctuations are detected, for example, by an ultrasonic transmitter 5 and an ultrasonic receiver 6, thereby measuring the flow velocity or flow rate of the fluid to be measured.

上述のように１本発明によると、被測定流体流路を形成
する管体の管壁に湯圧導入孔Ａを設けるとともに、該管
壁の外側において中空体４に湯圧導入孔Ｂを設けるよう
にしたので、流路管１内で発生されるノイズの影響を受
けにくく、湯度動圧による流れも整流されるので、検出
波形の質がよく、また、湯圧導入孔Ｂを大きくすること
ができるので、流路管１内におけるダスト等の影響を受
けにくく、従って、湯圧を効果的に検出することができ
る。また、圧力導入孔Ｂを第２図に示すように流路管ｌ
に対して垂直にすることができるので、流路管内の水分
、ダスト等に対して有効であり、更には、孔Ａと孔Ｂが
直交しているので、外乱超音波に対して有効である等の
利点を有する。As described above, according to the present invention, the hot water pressure introduction hole A is provided in the tube wall of the tube forming the fluid flow path to be measured, and the hot water pressure introduction hole B is provided in the hollow body 4 on the outside of the tube wall. As a result, it is less susceptible to the effects of noise generated within the flow path pipe 1, and the flow due to the dynamic pressure of hot water is rectified, so the quality of the detected waveform is good, and the hot water pressure introduction hole B can be enlarged. Therefore, it is less susceptible to the influence of dust, etc. in the flow path pipe 1, and therefore, the hot water pressure can be detected effectively. In addition, the pressure introduction hole B is connected to the flow path pipe l as shown in FIG.
Since the hole A and hole B are perpendicular to each other, it is effective against moisture, dust, etc. in the flow pipe, and since the hole A and hole B are perpendicular to each other, it is effective against disturbance ultrasonic waves. It has the following advantages.

第３図は、本発明の他の実施例を示す要部断面図で、こ
の実施例は、湯圧導入孔Ａを中空体４の貫通孔と別にし
たもので、このようにしても、第１図及び第２図に示し
た実施例と同様の作用効果を奏することは容易に理解で
きよう。FIG. 3 is a sectional view of a main part showing another embodiment of the present invention. In this embodiment, the hot water pressure introduction hole A is separated from the through hole of the hollow body 4. It is easy to understand that the same effects as the embodiments shown in FIGS. 1 and 2 can be achieved.

第４図は、本発明の更に他の実施例を示す要部断面構成
図で、この実施例は、湯圧導入孔Ｂの近傍の部材の表面
に吸音材７を設け、外乱超音波が中空体内に侵入して検
出信号に悪影響をしないようにしたものである。FIG. 4 is a cross-sectional configuration diagram of a main part showing still another embodiment of the present invention. It is designed so that it does not enter the body and adversely affect the detection signal.

更に、上記各実施例において、湯圧導入孔Ａの近傍に例
えば多孔質金属から成るフィルタを配設することも可能
で、フィルタを設けると、被測定流体中に混入している
塵埃が中空体内へ侵入するのを更に効果的に防止するこ
とができる。Furthermore, in each of the above embodiments, it is also possible to arrange a filter made of porous metal, for example, near the hot water pressure introduction hole A. If the filter is provided, dust mixed in the fluid to be measured will be trapped inside the hollow body. It is possible to more effectively prevent the intrusion into the body.

紘−一泉 以上の説明から明らかなように、本発明によると、外乱
の影響を受けず、かつ、被測定流体中に混入されている
塵埃によって湯圧導入孔が閉塞される心配のない渦流量
計を提供することができる。As is clear from the above explanation, according to the present invention, the vortex is not affected by external disturbances and there is no fear that the hot water pressure introduction hole will be blocked by dust mixed in the fluid to be measured. A flow meter can be provided.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明による渦流量計の一実施例を説明する
ための要部断面構成図、第２図は、第１図のｎ−ｎ線断
面図、第３図及び第４図は、それぞれ本発明の他の実施
例を示す構成図である。 １・・・流路管、２・・・渦発生体＋　３ａ、３ｂ・・
・カルマン渦、４・・・中空体、５・・・超音波送信器
、６・・・超音波受信器、７・・・吸音材、Ａ、Ｂ・・
・湯圧導入孔。 第１図 第２図 第３図 第４図FIG. 1 is a cross-sectional configuration diagram of essential parts for explaining one embodiment of a vortex flowmeter according to the present invention, FIG. 2 is a cross-sectional view taken along line nn in FIG. 1, and FIGS. 3 and 4 are , respectively, are configuration diagrams showing other embodiments of the present invention. 1... Channel pipe, 2... Vortex generator + 3a, 3b...
・Karman vortex, 4... hollow body, 5... ultrasonic transmitter, 6... ultrasonic receiver, 7... sound absorbing material, A, B...
・Hot water pressure introduction hole. Figure 1 Figure 2 Figure 3 Figure 4

Claims (5)

【特許請求の範囲】[Claims] （１）、流路の管体内に流れに対向して配設された渦発
生体と、該渦発生体の後流側に前記渦発生体と交差する
方向に前記管体壁を貫通する中空体とを有し、該中空体
は前記管体の外部において前記渦発生体によって生じる
渦による変動圧力が導入され、該中空体内における前記
変動圧力又は該変動圧力による流体変動を検出するよう
にしたことを特徴とする渦流量計。(1) A vortex generator disposed in a tubular body of a flow path to face the flow, and a hollow space penetrating the wall of the tubular body in a direction intersecting the vortex generator on the downstream side of the vortex generator. The hollow body has a fluctuating pressure caused by a vortex generated by the vortex generating body outside the tubular body, and the fluctuating pressure inside the hollow body or the fluid fluctuation due to the fluctuating pressure is detected. A vortex flow meter characterized by: （２）、前記中空体内の流体変動を該中空体両端面間を
伝搬する超音波の前記流体変動による変調として検出す
るようにしたことを特徴とする特許請求の範囲第（１）
項に記載の渦流量計。(2) The fluid fluctuation within the hollow body is detected as modulation of the ultrasonic wave propagating between both end faces of the hollow body due to the fluid fluctuation.
Vortex flowmeter as described in section. （３）、前記中空体の圧力導入口付近の部材に吸音材を
被着したことを特徴とする特許請求の範囲第（１）項又
は第（２）項に記載の渦流量計。(3) The vortex flowmeter according to claim 1 or 2, characterized in that a sound absorbing material is attached to a member near the pressure inlet of the hollow body. （４）、前記中空体の圧力導入口付近に多孔質体を着脱
自在に装着したことを特徴とする特許請求の範囲第（１
）項乃至第（３）項のいずれか１項に記載の渦流量計。(4) Claim (1) characterized in that a porous body is detachably attached to the vicinity of the pressure introduction port of the hollow body.
) to (3). （５）、前記中空体に設けられた過圧導入孔が前記管体
に対して垂直であることを特徴とする特許請求の範囲第
（１）項乃至第（４）項のいずれか１項に記載の渦流量
計。(5) Any one of claims (1) to (4), characterized in that the overpressure introduction hole provided in the hollow body is perpendicular to the pipe body. Vortex flowmeter as described in .
JP58148928A 1983-08-15 1983-08-15 Vortex flowmeter Granted JPS6040914A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP58148928A JPS6040914A (en) 1983-08-15 1983-08-15 Vortex flowmeter
US06/637,924 US4683760A (en) 1983-08-15 1984-08-06 Vortex flow meter
EP84109373A EP0137945B1 (en) 1983-08-15 1984-08-07 Vortex flow meter
DE8484109373T DE3476449D1 (en) 1983-08-15 1984-08-07 VORTEX FLOW METER
CA000461004A CA1228752A (en) 1983-08-15 1984-08-14 Vortex flow meter
KR1019840004876A KR890004447B1 (en) 1983-08-15 1984-08-14 Spiral fluid meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58148928A JPS6040914A (en) 1983-08-15 1983-08-15 Vortex flowmeter

Publications (2)

Publication Number Publication Date
JPS6040914A true JPS6040914A (en) 1985-03-04
JPH038695B2 JPH038695B2 (en) 1991-02-06

Family

ID=15463794

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58148928A Granted JPS6040914A (en) 1983-08-15 1983-08-15 Vortex flowmeter

Country Status (1)

Country Link
JP (1) JPS6040914A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62177414A (en) * 1986-01-31 1987-08-04 Oval Eng Co Ltd Vortex flow meter
JPS62214321A (en) * 1986-03-17 1987-09-21 Oval Eng Co Ltd Vortex flowmeter
US6435036B1 (en) 2000-07-17 2002-08-20 Matsushita Electric Industrial Co., Ltd. Vortex flow meter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5368272A (en) * 1976-11-30 1978-06-17 Nissan Motor Flow meter for von k*arman*s vortex street
JPS562886A (en) * 1979-06-19 1981-01-13 Ebara Infilco Co Ltd Neutralization of acidic water containing iron ion
JPS5826620U (en) * 1981-08-12 1983-02-21 オ−バル機器工業株式会社 vortex flow meter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5826620B2 (en) * 1976-10-27 1983-06-03 株式会社ユアサコーポレーション Button silver oxide battery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5368272A (en) * 1976-11-30 1978-06-17 Nissan Motor Flow meter for von k*arman*s vortex street
JPS562886A (en) * 1979-06-19 1981-01-13 Ebara Infilco Co Ltd Neutralization of acidic water containing iron ion
JPS5826620U (en) * 1981-08-12 1983-02-21 オ−バル機器工業株式会社 vortex flow meter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62177414A (en) * 1986-01-31 1987-08-04 Oval Eng Co Ltd Vortex flow meter
JPH0460534B2 (en) * 1986-01-31 1992-09-28 Obara Kiki Kogyo Kk
JPS62214321A (en) * 1986-03-17 1987-09-21 Oval Eng Co Ltd Vortex flowmeter
JPH0460535B2 (en) * 1986-03-17 1992-09-28 Obara Kiki Kogyo Kk
US6435036B1 (en) 2000-07-17 2002-08-20 Matsushita Electric Industrial Co., Ltd. Vortex flow meter

Also Published As

Publication number Publication date
JPH038695B2 (en) 1991-02-06

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