DE9113294U1 - Device for measuring small liquid volume flows - Google Patents
Device for measuring small liquid volume flowsInfo
- Publication number
- DE9113294U1 DE9113294U1 DE9113294U DE9113294U DE9113294U1 DE 9113294 U1 DE9113294 U1 DE 9113294U1 DE 9113294 U DE9113294 U DE 9113294U DE 9113294 U DE9113294 U DE 9113294U DE 9113294 U1 DE9113294 U1 DE 9113294U1
- Authority
- DE
- Germany
- Prior art keywords
- measuring vessel
- valve
- measuring
- inlet
- ofs
- 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 - Lifetime
Links
- 239000007788 liquid Substances 0.000 title claims description 15
- 238000005259 measurement Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010949 in-process test method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/28—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement
- G01F11/284—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement combined with electric level detecting means
-
- 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
- G01F1/007—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 measuring the level variations of storage tanks relative to the time
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
Description
91 G h 91 G h
Siemens AktiengesellschaftSiemens AG
Vorrichtung zum Messen von kleinen Flüssigkeitsvolumenströmen 5Device for measuring small liquid volume flows 5
Die Neuerung betrifft eine Vorrichtung zum Messen von kleinen Flüssigkeitsvolumenströmen gemäß dem Oberbegriff des Anspruchs 1.The innovation relates to a device for measuring small liquid volume flows according to the preamble of claim 1.
Eine derartige Vorrichtung ist als Auslaufzähler mit feststehendem Meßgefäß aus dem Buch "Messen, Steuern und Regeln in der Chemischen Technik", 3. Auflage, Band I, Springer-Verlag 1980, Seiten 370/371 bekannt. Mittels eines Schwimmers werden ein Zu- und ein Ablaufventil so gesteuert, daß das Ablaufventil geöffnet und das Zulaufventil geschlossen wird, wenn der Flüssigkeitspegel im Meßgefäß einen oberen Schaltfüllstand erreicht, und daß bei Absinken des Flüssigkeitspegels auf einen unteren Schaltfüllstand das Ablaufventil geschlossen und das Zulaufventil geöffnet wird.Such a device is known as a discharge meter with a fixed measuring vessel from the book "Messen, Steuerung und Regel in der Chemischen Technik", 3rd edition, Volume I, Springer-Verlag 1980, pages 370/371. A float is used to control an inlet and outlet valve in such a way that the outlet valve is opened and the inlet valve is closed when the liquid level in the measuring vessel reaches an upper switching level, and that when the liquid level drops to a lower switching level, the outlet valve is closed and the inlet valve is opened.
Der vorliegenden Neuerung liegt die Aufgabe zugrunde, die bekannte Vorrichtung so zu verbessern, daß sie in der Prozeßanalytik einsetzbar ist.The aim of the present innovation is to improve the known device so that it can be used in process analysis.
Gemäß der Neuerung wird diese Aufgabe mit den im kennzeichnenden Teil des Anspruchs 1 angegebenen Maßnahmen gelöst.According to the innovation, this problem is solved by the measures specified in the characterising part of claim 1.
Anhand der Zeichnung, in der ein Ausführungsbeispiel veranschaulicht ist, werden im folgenden die Neuerung sowie Ausgestaltungen und Weiterbildungen näher beschrieben und erläutert. Using the drawing, which illustrates an example of implementation, the innovation as well as the refinements and further developments are described and explained in more detail below.
Einem Meßgefäß G wird über eine Zulaufleitung LZ, in der ein Zulaufventil Vl liegt, Flüssigkeit zugeführt, deren Volumenstrom gemessen werden soll. Am Boden des Meßgefäßes G befindet sich ein Ablauf AL, der mit einem Ablaufventil V2 gesperrt werden kann. Die Ventile Vl, V2 werden von einer Steuerung ST betätigt. Für die folgende Funktionsbeschreibung der Vorrichtung wird angenommen, daß zunächst das Zulaufventil Vl ge-A measuring vessel G is supplied with liquid via a supply line LZ, in which an inlet valve Vl is located, the volume flow of which is to be measured. At the bottom of the measuring vessel G there is an outlet AL, which can be blocked with an outlet valve V2. The valves Vl, V2 are operated by a control ST. For the following functional description of the device, it is assumed that the inlet valve Vl is opened first.
02 0102 01
31 G M*631 G M*6
öffnet und das Ablaufventil V2 gesperrt ist. Desgleichen ist ein weiteres Ventil V6, das in einer an die Zulaufleitung LZ angeschlossenen Leitung liegt, gesperrt. Die über die Zulaufleitung LZ zuströmende Flüssigkeit wird daher im Meßgefäß G gesammelt. Der Füllstand wird von einem Sensor S, der im Ausführungsbeispiel ein kapazitiver Sensor ist, berührungslos überwacht und der Steuerung ST gemeldet. Wird ein oberer Schaltfüllstand OFS erreicht, öffnet die Steuerung das Ablaufventil V2 und schließt das Zulaufventil Vl. Die gesammelte Flüssigkeit fließt rasch durch den großdimensionierten Ablauf AL ab. Das Meßgefäß ist zumindest im unteren Bereich nach unten konisch ausgebildet, damit es sich schnell und vollständig entleert. Nach einer festgelegten Zeit, die sicher für die Entleerung ausreicht, wird das Ablaufventil V2 wieder geschlossen und das Zulaufventil Vl geöffnet. Es beginnt ein neuer Meßzyklus, wobei die Zeit vom Schließen des Ablaufventils V2 bzw. dem Öffnen des Zulaufventils Vl bis zum Erreichen des oberen Schaltfüllstandes OFS gemessen wird. Das Füllvolumen bei Erreichen des oberen Schaltfüllstandes OFS ist bekannt; das Verhältnis von Füllvolumen zu Füllzeit ergibt den zu messenden Volumenstrom. Das Meßergebnis wird von der Steuerung ST über einen Ausgang A abgegeben. Während der Zeiten, in denen das Zulaufventil Vl geschlossen ist, kann die Meßflüssigkeit über das Ventil V6 an der Meßvorrichtung vorbeigeleitet werden.opens and the drain valve V2 is closed. Likewise, another valve V6, which is located in a line connected to the inlet line LZ, is closed. The liquid flowing in via the inlet line LZ is therefore collected in the measuring vessel G. The fill level is monitored contactlessly by a sensor S, which in the example is a capacitive sensor, and reported to the control system ST. If an upper switching fill level OFS is reached, the control system opens the drain valve V2 and closes the inlet valve Vl. The collected liquid flows quickly through the large drain AL. The measuring vessel is tapered downwards, at least in the lower area, so that it empties quickly and completely. After a set time, which is certainly sufficient for emptying, the drain valve V2 is closed again and the inlet valve Vl is opened. A new measuring cycle begins, whereby the time from closing the drain valve V2 or opening the inlet valve Vl until the upper switching level OFS is reached is measured. The filling volume when the upper switching level OFS is reached is known; the ratio of filling volume to filling time gives the volume flow to be measured. The measurement result is output by the ST control system via an output A. During the times in which the inlet valve Vl is closed, the measuring liquid can be bypassed by the measuring device via the valve V6.
Falls erforderlich, wird das Meßgefäß in den einzelnen Meßzyklen nicht vollständig entleert, sondern nur bis zu einem unteren Schaltfüllstand UFS, der ebenfalls vom Sensor S gemeldet wird. Bei dessen Erreichen wird das Ablaufventil V2 geschlossen und das Zulaufventil Vl geöffnet. Das Füllvolumen ist in diesem Falle das Volumen des Meßgefäßes zwischen dem oberen und dem unteren Schaltfüllstand.If necessary, the measuring vessel is not completely emptied in the individual measuring cycles, but only down to a lower switching fill level UFS, which is also reported by the sensor S. When this level is reached, the drain valve V2 is closed and the inlet valve Vl is opened. In this case, the filling volume is the volume of the measuring vessel between the upper and lower switching fill levels.
Häufig ist die Zeit zum Entleeren des Meßgefäßes, also die Öffnungszeit des Ablaufventils V2, so klein im Verhältnis zur Füllzeit, daß das Zulaufventil Vl auch während des Entleerens des Meßgefäßes geöffnet bleiben kann. Das dadurchOften the time for emptying the measuring vessel, i.e. the opening time of the drain valve V2, is so small in relation to the filling time that the inlet valve Vl can remain open even while the measuring vessel is being emptied. The resulting
7AO 02 027AO 02 02
91 G <m 691 G <m 6
nicht erfaßte Flüssigkeitsvolumen beeinträchtigt die Meßgenauigkeit nur unwesentlich.Unrecorded liquid volumes only affect the measurement accuracy insignificantly.
Zum Reinigen des Meßgefäßes, &zgr;. B. wenn die Meßflüssigkeit auskristallisierte, kann durch Öffnen eines Ventiles V4 von einer Leitung LS dem Meßgefäß eine Spülflüssigkeit zugeführt werden. Danach kann durch Öffnen eines Ventiles V5 das Meßgefäß mit Druckluft aus einer Leitung LD getrocknet werden. Ein Entlüftungsventil V3, das zumindest während der Meßvorgänge geöffnet sein muß, ist dabei zweckmäßig geschlossen, damit die gesamte einströmende Luft durch den unteren Teil des Meßgefäßes und das Ablaufventil V2 abströmt.To clean the measuring vessel, e.g. if the measuring liquid has crystallized, a rinsing liquid can be fed to the measuring vessel from a line LS by opening a valve V4. The measuring vessel can then be dried with compressed air from a line LD by opening a valve V5. A vent valve V3, which must be open at least during the measuring processes, is preferably closed so that all the incoming air flows out through the lower part of the measuring vessel and the drain valve V2.
02 0302 03
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9113294U DE9113294U1 (en) | 1991-10-25 | 1991-10-25 | Device for measuring small liquid volume flows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9113294U DE9113294U1 (en) | 1991-10-25 | 1991-10-25 | Device for measuring small liquid volume flows |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE9113294U1 true DE9113294U1 (en) | 1992-11-19 |
Family
ID=6872613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE9113294U Expired - Lifetime DE9113294U1 (en) | 1991-10-25 | 1991-10-25 | Device for measuring small liquid volume flows |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE9113294U1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021789A1 (en) * | 1994-02-08 | 1995-08-17 | Krones Ag Hermann Kronseder Maschinenfabrik | Process for filling containers with a certain volume of liquid |
| EP0810422A1 (en) * | 1996-05-28 | 1997-12-03 | Mbt Holding Ag | Quick-charge and -discharge dispensing system for liquid indirectly weighed in a dispenser |
| FR2756628A1 (en) * | 1996-12-02 | 1998-06-05 | Poquet Sa | Volume metering system for liquid products e.g. detergents |
| DE19726707C1 (en) * | 1997-06-24 | 1998-09-10 | Henkel Ecolab Gmbh & Co Ohg | Dispenser for dry cleaning liquids and auxiliaries |
| DE19757069A1 (en) * | 1997-12-20 | 1999-06-24 | Zelano Marco | Boiler flue gas condensate level evaluation method |
| DE102004041337A1 (en) * | 2004-08-20 | 2006-03-09 | Gebr. Schmidt Fabrik für Feinmechanik GmbH & Co. KG | Fluid reservoir for use in micro-dosing system, has inlet connected with duct having opening that is arranged at cavity`s liquid level, so that fluid to be refilled contacts with fluid in cavity before it comes to drop form at opening |
| DE10119347B4 (en) * | 2001-04-20 | 2009-02-12 | Carmen Jurka Serak | Device for producing ready-to-use vehicle license plates from printed circuit boards |
-
1991
- 1991-10-25 DE DE9113294U patent/DE9113294U1/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021789A1 (en) * | 1994-02-08 | 1995-08-17 | Krones Ag Hermann Kronseder Maschinenfabrik | Process for filling containers with a certain volume of liquid |
| US5896900A (en) * | 1994-02-08 | 1999-04-27 | Krones Ag Hermann Kronseder Maschinenfabrik | Method and apparatus for filling a liquid volume into receptacles |
| EP0810422A1 (en) * | 1996-05-28 | 1997-12-03 | Mbt Holding Ag | Quick-charge and -discharge dispensing system for liquid indirectly weighed in a dispenser |
| FR2756628A1 (en) * | 1996-12-02 | 1998-06-05 | Poquet Sa | Volume metering system for liquid products e.g. detergents |
| DE19726707C1 (en) * | 1997-06-24 | 1998-09-10 | Henkel Ecolab Gmbh & Co Ohg | Dispenser for dry cleaning liquids and auxiliaries |
| DE19757069A1 (en) * | 1997-12-20 | 1999-06-24 | Zelano Marco | Boiler flue gas condensate level evaluation method |
| DE10119347B4 (en) * | 2001-04-20 | 2009-02-12 | Carmen Jurka Serak | Device for producing ready-to-use vehicle license plates from printed circuit boards |
| DE102004041337A1 (en) * | 2004-08-20 | 2006-03-09 | Gebr. Schmidt Fabrik für Feinmechanik GmbH & Co. KG | Fluid reservoir for use in micro-dosing system, has inlet connected with duct having opening that is arranged at cavity`s liquid level, so that fluid to be refilled contacts with fluid in cavity before it comes to drop form at opening |
| DE102004041337B4 (en) * | 2004-08-20 | 2006-06-29 | Gebr. Schmidt Fabrik für Feinmechanik GmbH & Co. KG | Fluid reservoir for use in micro-dosing system, has inlet connected with duct having opening that is arranged at cavity`s liquid level, so that fluid to be refilled contacts with fluid in cavity before it comes to drop form at opening |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2550340B2 (en) | Flow meter with bubble trap | |
| DE3020161C2 (en) | Milk quantity measuring device for milking systems for the direct measurement of the amount of milk given off by a cow in the course of milking | |
| DE9113294U1 (en) | Device for measuring small liquid volume flows | |
| DE69019614T2 (en) | Filters for automatic cleaning of liquid circuits. | |
| DE3040268C2 (en) | ||
| DE69629867T2 (en) | Method of feeding and collecting solutions | |
| DE202005006066U1 (en) | Mud level measurement instrument for a clarification plant has a valve arrangement with tie rod, spring and operating lever that permits filling of a clear viewing element in a low-vibration manner | |
| DE3235405A1 (en) | DEVICE FOR VOLUMETRICALLY MEASURING LIQUIDS | |
| DE3029693A1 (en) | DEVICE FOR MEASURING GAS CONTENTS IN LIQUIDS | |
| DE29704794U1 (en) | Arrangement for the automatic cleaning of the tap, beverage line and dispensing head in beverage, in particular beer dispensing systems | |
| DE3225100C2 (en) | Measuring device for measuring small liquid volume flows | |
| DE3042315A1 (en) | Suction filling and weighing material transport - uses cylindrical weighing container with suction inlet, outlet and annular filter | |
| DE2601732B2 (en) | Process for winding the filter chambers of a filter unit and filter unit for carrying out this process | |
| DE1773656A1 (en) | Method and device for taking milk samples from a flow line | |
| DE3417454A1 (en) | DEVICE FOR MEASURING THE OIL CONTENT OF WATER | |
| DE3615882A1 (en) | Device for taking a sample from a liquid container, especially of a milk collection system | |
| DE2525213A1 (en) | Liquid samples collection method - for obtaining samples of sewage involves vessel which is filled at fixed intervals with required sample volume | |
| DE8631652U1 (en) | Device for preventing unacceptably high concentrations of poorly soluble substances such as halogenated hydrocarbons | |
| DE2200733A1 (en) | GAS MEASUREMENT PROTECTION SYSTEM FOR VOLUME FLUID METER | |
| AT235248B (en) | Device for inhibiting the flow of liquids in dosing devices for reagents in automatic analyzers and the like. a. chemical apparatus | |
| DE2421863A1 (en) | DEVICE FOR SUCTIONING LIQUID IN A CONTAINER | |
| DE4321090C2 (en) | Method and device for cleaning milking systems | |
| DE2348225C3 (en) | Liquid level indicator | |
| DE1598605C3 (en) | System for accepting a sample from a liquid, in particular milk | |
| DE1598619B2 (en) | DIRT SAMPLER FOR MILK RECEPTION FACILITIES |