DE1648136A1 - Differential pressure flow meter - Google Patents

Differential pressure flow meter

Info

Publication number
DE1648136A1
DE1648136A1 DE19671648136 DE1648136A DE1648136A1 DE 1648136 A1 DE1648136 A1 DE 1648136A1 DE 19671648136 DE19671648136 DE 19671648136 DE 1648136 A DE1648136 A DE 1648136A DE 1648136 A1 DE1648136 A1 DE 1648136A1
Authority
DE
Germany
Prior art keywords
differential pressure
flow meter
pressure flow
flow
measuring
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
Application number
DE19671648136
Other languages
German (de)
Inventor
Michael Feck
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.)
TURBO WERK KOELN FRITZ HAMMELR
Original Assignee
TURBO WERK KOELN FRITZ HAMMELR
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 TURBO WERK KOELN FRITZ HAMMELR filed Critical TURBO WERK KOELN FRITZ HAMMELR
Publication of DE1648136A1 publication Critical patent/DE1648136A1/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05Measuring 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
    • G01F1/34Measuring 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 measuring pressure or differential pressure
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05Measuring 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
    • G01F1/20Measuring 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
    • G01F1/206Measuring pressure, force or momentum of a fluid flow which is forced to change its direction

Landscapes

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

Description

Differensdruck-Strömungsmesser Zur Mengenmessung von Flüssigkeiten und Gasen sind in der Praxis verschiedene Systeme bekannt. Die allgemein bekannteste dürfte wohl die Staublenden-Messung sein, Außer dieser werden auch noch häufig Schwebekörpermesser sowie Stauplattenmesser verwendet. Differential pressure flow meter For measuring the quantity of liquids and gases, various systems are known in practice. The most popular one Probably the dust aperture measurement, besides this, float meters are also often used as well as baffle knife used.

Alle vorbeschriebenen Meßarten haben den einen Nachteil, daß es hier'an den Meßstellen zu relativ starken Querschnitts-Einschnürungen kommt, durch die u. U. starke Druckverluste entstehen. Bei verschmutzten Medien führt es an diesen Stellen oft zu Ablagerungen bzw, zu Verstopfungen. All the types of measurement described above have the one disadvantage that this is the case the measuring points to relatively strong cross-sectional constrictions through which u. U. strong pressure losses arise. In the case of dirty media, it leads to these points often to deposits or to blockages.

Bei der im folgenden beschriebenen Meßmethode werden die vorher beschriebenen Nachteile vermieden, da man zur Messung der Durch'flußmenge weder eine Blende, Stauplatte oder Schwebekörper verwendet, den freien Querschnitt der Rohrleitung also nicht verändert. Das Meßgerät hat kein Strömungshindernis, so daß auch stark verschmutzte Medien gemessen werden können. Weiter ist das Gerät weitgehend unempfindlich gegen Viskositätsänderungen. In the measurement method described below, those previously described are used Disadvantages are avoided because neither a diaphragm nor a baffle plate is required to measure the flow rate or float is used, i.e. not the free cross-section of the pipeline changes. The measuring device has no flow obstacles, so that even heavily soiled ones Media can be measured. Furthermore, the device is largely insensitive to Viscosity changes.

Die Druckdifferenz zum Messen der Strömung wird dadurch erzeugt, daß das Medium durch eine Rohrschleife, einen halbkreisförmigen; Bogen oder auch einfachen Winkelbogen geführt wird, wobei es unerheblich ist, ob die Rohrschleife kreisförmig oder oval verläuft oder ob der Rohrquersohnitt rund oder eine sonstige Form hat. The pressure difference for measuring the flow is generated by that the medium passes through a pipe loop, a semicircular; Bow or also simple elbow is performed, it is irrelevant whether the pipe loop circular or oval or whether the Rohrquersohnitt round or some other Has shape.

Beim Passieren der Rohrschleife oder dgl. entwickelt das Medium infolge seiner Flichkraft einen Druck auf die Außenwandung, während an der Innenwandung ein Unterdruck entsteht. When passing the pipe loop or the like. The medium develops as a result its Flichkraft a pressure on the outer wall, while on the inner wall a negative pressure is created.

Die Druckdifferenz wird in der symetrischen Ebene der Schleife, des Winkelbogens e ct gemessen und zur Anzeige der Durchflußgeschwindigkeit resp. der Durchflußmenge benutzt. Das Druckausgangs-Signal ist annähernd quadratisch. Die Breite des Meßbereiches ist in jedem Fale günstiger als die einer Staublende resp. Stauplatte. The pressure difference is in the symmetrical plane of the loop, des Angle arc e ct measured and to display the flow rate, respectively. the Flow rate used. The print output signal is approximately square. the Width of the measuring range is more favorable in each case than that of a dust cover, respectively. Stowage plate.

In der beigefügten Skizze ist ein Durchfl#messgerät in einer beispielsweisen Form dargestellt, wobei"1" die Rohrschleife bedeutet,"2"und"3" sind die ibnahmestellen für das Ausgangssignal, d. h0 "2" den Differenzdruck + und "3" den Differenzdruck resp. Unterdruck. Die Anzeige erfolgt durch das Anzeigeinstrument,"5". Im vorliegenden Falle ein Differenzdruokmanometer. Anstelle -dieses D-f ferenzdruckmanome ters kann auch ein , Sohwebekörpermesser treten durch den eine von + nach - fließende Teilmenge des Mediums gemessen wird. Selbstverständlich tat auch die Boaufschlagung eines Transmitters mit einem elektrischen oder pneumatischen Ausgangssignal möglich. Die eingezeichneten Pfeile deuten die Durchflußrichtung an. Grundsätzlich ist die Durchflußrichtung und Einbaulage für die Messung ohne Bedeutung. In the attached sketch a flow meter is shown as an example Shape shown, where "1" means the pipe loop, "2" and "3" are the pick-up points for the output signal, d. h0 "2" the differential pressure + and "3" the differential pressure resp. Negative pressure. The display is made by the display instrument, "5". In the present Trap a differential pressure gauge. Instead of this D-f ferenzdruckmanometer can also a, Sohwebekkörpermesser pass through the one from + to - flowing subset of the medium is measured. Of course, the booster did too one Transmitter with an electrical or pneumatic output signal possible. the The arrows shown indicate the direction of flow. Basically the direction of flow is and mounting position is irrelevant for the measurement.

Schutzansprüche 1). 3ifferenzdruck-Strömungsmesser dadurch gekennzeichnet, daß das Verhältnis des Krümmungsradius vom Meßgerät zum Radius des Meßrohres oder bei rechteckigen Querschnitten zur kleinsten Seitenlänge in der Größenordnung 1:1 bis 10:1 liegen kann. Protection claims 1). 3 differential pressure flow meter characterized that the ratio of the radius of curvature of the measuring device to the radius of the measuring tube or in the case of rectangular cross-sections, the smallest side length in the order of 1: 1 can be up to 10: 1.

Claims (1)

2). Differenzdruck-Strömungsmesser nach Anspruch 1" dadurch gekenn zeichnet, daß der Differenzdruck an der Au#enwandung und an der gegenüberliegenden Innenwandung der Krümmungsebene in der Winkelmitte abgenommen wird.2). Differential pressure flow meter according to claim 1 "characterized thereby shows that the differential pressure on the outer wall and on the opposite Inner wall of the plane of curvature is removed in the center of the angle. 3) Differenzdruck-Strömungsmesser nach Anspruch "1" und " 2" dadurch gekennzeichnet, daß der Durchmesser des Meßrohres kleiner sein kann als der Durchmesser der Anschlußleitung, in welcher der Messer eingebaut ist,3) differential pressure flow meter according to claim "1" and "2" thereby characterized in that the diameter of the measuring tube can be smaller than the diameter the connection line in which the knife is installed,
DE19671648136 1967-01-19 1967-01-19 Differential pressure flow meter Pending DE1648136A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET0033013 1967-01-19

Publications (1)

Publication Number Publication Date
DE1648136A1 true DE1648136A1 (en) 1971-06-16

Family

ID=7557446

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19671648136 Pending DE1648136A1 (en) 1967-01-19 1967-01-19 Differential pressure flow meter

Country Status (1)

Country Link
DE (1) DE1648136A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384240A1 (en) * 1977-03-18 1978-10-13 Texaco Development Corp MULTI-PHASE FLUID MEASURING DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384240A1 (en) * 1977-03-18 1978-10-13 Texaco Development Corp MULTI-PHASE FLUID MEASURING DEVICE

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