EP2034186A2 - Device for supplying liquids - Google Patents
Device for supplying liquids Download PDFInfo
- Publication number
- EP2034186A2 EP2034186A2 EP08015254A EP08015254A EP2034186A2 EP 2034186 A2 EP2034186 A2 EP 2034186A2 EP 08015254 A EP08015254 A EP 08015254A EP 08015254 A EP08015254 A EP 08015254A EP 2034186 A2 EP2034186 A2 EP 2034186A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- borne noise
- electric motor
- measured
- change
- 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
Links
- 239000007788 liquid Substances 0.000 title claims description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 238000011156 evaluation Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/08—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the rotational speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/28—Safety arrangements; Monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/13—Noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/80—Diagnostics
Definitions
- the invention relates to a device for conveying liquids, in particular for dispensing liquids from tank trucks according to claim 1.
- the object of the invention is to provide a device of simple construction and action for conveying liquids, in particular for dispensing liquids from a tanker truck.
- a structure-borne sound pickup is arranged on the housing of the pump, which is connected to an evaluation device for the measured structure-borne noise of the pump housing.
- the evaluation device generates a signal for the control device of the drive motor the pump when a change in the measured structure-borne noise is detected.
- the invention is based on the fact that in displacement pumps when sucking air, the noise of the pump is changed. The reason for this is the sudden pressure increase in the pump, which causes the small air bubbles present to implode. With the help of a structure-borne sound pickup, this phenomenon can now be used to detect air bubbles in liquids.
- structure-borne noise must be suitably analyzed, for example with regard to its frequency and amplitude.
- the drive motor of the pump is activated accordingly.
- the drive motor can be switched off and a discharge valve can be locked.
- the control device can reduce the drive motor in its speed, or down regulate until no more air bubbles occur.
- the single figure shows a schematic diagram of the device according to the invention.
- a pump 10 is shown, for example, a vane pump. It is connected to a suction duct 12, e.g. led to the chambers of a tanker, not shown. For several chambers, the line 12 is a manifold.
- a pressure line 14 of the pump 10 passes via a dispensing valve 16 to a dispensing line 18, which e.g. connected to a hose, for conveying the liquid from the tanker in a receiving tank (also not shown).
- the dispensing valve 16 is actuated by an actuator 20. Before the dispensing valve, a volumeter, not shown, is arranged.
- the vane pump 10 is driven by an electric motor 22, which in turn is controlled by a control device 24.
- the electric motor 22 may be e.g. be a three-phase motor.
- a structure-borne sound pickup 26 With the housing of the vane pump 10, not shown, a structure-borne sound pickup 26 is connected.
- the structure-borne sound pickup 26 registers the structure-borne noise caused in the housing.
- the structure-borne sound signal of the structure-borne sound receiver 26 reaches an evaluation device 28, which analyzes the structure-borne sound with regard to the amplitude and / or frequency.
- the frequency or amplitude spectrum changes with the appearance of air bubbles in the suction line 12. If this change is significant, the control device 24 is driven so that either the motor 22 is turned off or reduced in its speed. In the latter case, the speed can be adjusted so that no more air bubbles occur.
- the Dispensing valve 16 With the switching off of the drive motor 22 may also be the Dispensing valve 16 are transferred to the blocking state, so that no more gravity delivery occurs.
- the volume meter is arranged, with which the dispensed amount of liquid is measured. Measuring air interferes with the accuracy of the quantity measurement.
Abstract
Description
Die Erfmdung bezieht sich auf eine Vorrichtung zum Fördern von Flüssigkeiten, insbesondere zur Abgabe von Flüssigkeiten aus Tankwagen nach dem Anspruch 1.The invention relates to a device for conveying liquids, in particular for dispensing liquids from tank trucks according to claim 1.
Die Abgabe von Flüssigkeiten aus Tankwagen erfolgt entweder über Schwerkraft oder den Einsatz von Pumpen. Für die Abgabe der Flüssigkeit wird ein Abgabeventil geöffnet. Es wird geschlossen, wenn das gewünschte Volumen abgegeben worden ist oder wenn Umstände auftreten, welche eine weitere Abgabe unzulässig werden lassen. Dies ist der Fall bei Auftreten eines bestimmten Anteils von Gaseinschlüssen, die bei volumetrischen Meßsystemen naturgemäß zu einer Fehlmessung führen.The discharge of liquids from tankers is done either by gravity or the use of pumps. For dispensing the liquid, a dispensing valve is opened. It will be closed when the desired volume has been dispensed, or when circumstances arise which render another charge inadmissible. This is the case when a certain proportion of gas inclusions occurs, which naturally leads to a false measurement in volumetric measuring systems.
Aus
Aus
Aus
Der Erfmdung liegt die Aufgabe zugrunde, eine einfach aufgebaute und wirkende Vorrichtung zur Förderung von Flüssigkeiten, insbesondere zur Abgabe von Flüssigkeiten aus einem Tankwagen zu schaffen.The object of the invention is to provide a device of simple construction and action for conveying liquids, in particular for dispensing liquids from a tanker truck.
Diese Aufgabe wird durch die Vorrichtung mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by the device having the features of claim 1.
Bei der erfindungsgemäßen Vorrichtung ist am Gehäuse der Pumpe ein Körperschallaufnehmer angeordnet, der mit einer Auswertevorrichtung für den gemessenen Körperschall des Pumpengehäuses verbunden ist. Die Auswertevorrichtung erzeugt ein Signal für die Steuervorrichtung des Antriebsmotors der Pumpe, wenn eine Veränderung des gemessenen Körperschalls erfasst wird.In the apparatus of the invention, a structure-borne sound pickup is arranged on the housing of the pump, which is connected to an evaluation device for the measured structure-borne noise of the pump housing. The evaluation device generates a signal for the control device of the drive motor the pump when a change in the measured structure-borne noise is detected.
Die Erfindung geht von der Tatsache aus, dass bei Verdrängerpumpen beim Ansaugen von Luft das Geräusch der Pumpe verändert wird. Ursache hierfür ist die schlagartige Druckerhöhung in der Pumpe, die die vorhandenen kleinen Luftblasen zum Implodieren bringt. Mit Hilfe eines Körperschallaufnehmers kann nun dieses Phänomen zum Nachweis von Luftblasen in Flüssigkeiten verwendet werden.The invention is based on the fact that in displacement pumps when sucking air, the noise of the pump is changed. The reason for this is the sudden pressure increase in the pump, which causes the small air bubbles present to implode. With the help of a structure-borne sound pickup, this phenomenon can now be used to detect air bubbles in liquids.
Der Körperschall muss naturgemäß in geeigneter Weise analysiert werden, beispielsweise im Hinblick auf seine Frequenz und die Amplitude.Naturally, structure-borne noise must be suitably analyzed, for example with regard to its frequency and amplitude.
Stellt die Auswertevorrichtung eine Änderung des Körperschalls fest, wird der Antriebsmotor der Pumpe entsprechend angesteuert. Um eine Verfälschung von Messergebnissen auf der Druckseite der Pumpe zu verhindern, kann der Antriebsmotor abgeschaltet und ein Abgabeventil gesperrt werden. Bei einem ersten Auftreten von Luftblasen, welche sich bereits in einer Änderung des Körperschalls bemerkbar machen, kann die Steuervorrichtung den Antriebsmotor in seiner Drehzahl herabsetzen, bzw. soweit herunterregeln, bis keine Luftblasen mehr auftreten.If the evaluation device detects a change in structure-borne noise, the drive motor of the pump is activated accordingly. In order to prevent a falsification of measurement results on the pressure side of the pump, the drive motor can be switched off and a discharge valve can be locked. At a first occurrence of air bubbles, which make themselves felt in a change in structure-borne noise, the control device can reduce the drive motor in its speed, or down regulate until no more air bubbles occur.
Die Erfindung wird nachfolgend anhand einer Zeichnung kurz erläutert.The invention will be explained briefly with reference to a drawing.
Die einzige Figur zeigt ein schematisches Schaltbild der Vorrichtung nach der Erfindung.The single figure shows a schematic diagram of the device according to the invention.
In der Figur ist eine Pumpe 10 dargestellt, beispielsweise eine Flügelzellenpumpe. Sie ist mit einer Ansaugleitung 12 verbunden, die z.B. zu den Kammern eines nicht gezeigten Tankwagens geführt ist. Bei mehreren Kammern ist die Leitung 12 eine Sammelleitung. Eine Druckleitung 14 der Pumpe 10 gelangt über ein Abgabeventil 16 zu einer Abgabeleitung 18, welche z.B. mit einem Schlauch verbunden ist, zur Förderung der Flüssigkeit aus dem Tankwagen in einen Aufnahmetank (ebenfalls nicht dargestellt). Das Abgabeventil 16 wird von einem Aktuator 20 betätigt. Vor dem Abgabeventil ist ein nicht gezeigter Volumenmesser angeordnet.In the figure, a
Die Flügelzellenpumpe 10 wird von einem Elektromotor 22 angetrieben, der seinerseits von einer Steuervorrichtung 24 gesteuert ist. Der Elektromotor 22 kann z.B. ein Drehstrommotor sein.The
Mit dem nicht näher dargestellten Gehäuse der Flügelzellenpumpe 10 ist ein Körperschallaufnehmer 26 verbunden. Der Körperschallaufnehmer 26 registriert den im Gehäuse verursachten Körperschall. Das Körperschallsignal des Körperschallaufnehmers 26 gelangt zu einer Auswertevorrichtung 28, welche den Körperschall im Hinblick auf die Amplitude und/oder Frequenz analysiert. Das Frequenz- bzw. Amplitudenspektrum ändert sich mit dem Auftauchen von Luftbläschen in der Ansaugleitung 12. Ist diese Änderung signifikant, wird die Steuervorrichtung 24 angesteuert, damit entweder der Motor 22 abgeschaltet oder in seiner Drehzahl reduziert wird. In letzterem Fall kann die Drehzahl so eingestellt werden, dass keine Luftblasen mehr auftreten. Mit dem Abschalten des Antriebsmotors 22 kann außerdem das Abgabeventil 16 in den Sperrzustand überführt werden, damit auch keine Schwerkraftabgabe mehr erfolgt. Bekanntlich ist bei einer derartigen Vorrichtung vor oder hinter dem Abgabeventil 16 der Volumenzähler angeordnet, mit dem die abgegebene Flüssigkeitsmenge gemessen wird. Ein Mitmessen von Luft beeinträchtigt die Genauigkeit der Mengenmessung.With the housing of the
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200720012542 DE202007012542U1 (en) | 2007-09-06 | 2007-09-06 | Device for conveying liquids |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2034186A2 true EP2034186A2 (en) | 2009-03-11 |
EP2034186A3 EP2034186A3 (en) | 2011-07-06 |
EP2034186B1 EP2034186B1 (en) | 2015-07-01 |
Family
ID=38664343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08015254.9A Active EP2034186B1 (en) | 2007-09-06 | 2008-08-29 | Device for supplying liquids |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2034186B1 (en) |
DE (1) | DE202007012542U1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008047122A1 (en) | 2008-09-15 | 2010-04-22 | Bartec Gmbh | Device for dispensing liquid from a tank and method for emptying a line section |
CN110291293B (en) * | 2017-02-16 | 2021-07-20 | 液体控制有限公司 | System and method for delivering liquid fuel |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0035217A2 (en) | 1980-02-29 | 1981-09-09 | ALFONS HAAR Maschinenbau GmbH & Co. KG | Device for preventing the conjunctive mensuration of gaseous additional mixtures in dispensing liquids |
US5232006A (en) | 1990-12-07 | 1993-08-03 | F. Wennstrom Aktiebolag | System for separating gas from a liquid flow whose volume is to be measured |
DE19540884A1 (en) | 1995-11-02 | 1997-05-07 | Haar Maschbau Alfons | Measuring volume of flowing liquid without measuring faults by unallowed contained gas portions |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3520734A1 (en) * | 1985-06-10 | 1986-12-11 | Kraftwerk Union AG, 4330 Mülheim | Method and device for operating a centrifugal pump |
DE19517289A1 (en) * | 1995-05-11 | 1996-11-14 | Klein Schanzlin & Becker Ag | Monitoring system for determining a cavitation intensity |
-
2007
- 2007-09-06 DE DE200720012542 patent/DE202007012542U1/en not_active Expired - Lifetime
-
2008
- 2008-08-29 EP EP08015254.9A patent/EP2034186B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0035217A2 (en) | 1980-02-29 | 1981-09-09 | ALFONS HAAR Maschinenbau GmbH & Co. KG | Device for preventing the conjunctive mensuration of gaseous additional mixtures in dispensing liquids |
US5232006A (en) | 1990-12-07 | 1993-08-03 | F. Wennstrom Aktiebolag | System for separating gas from a liquid flow whose volume is to be measured |
DE19540884A1 (en) | 1995-11-02 | 1997-05-07 | Haar Maschbau Alfons | Measuring volume of flowing liquid without measuring faults by unallowed contained gas portions |
Also Published As
Publication number | Publication date |
---|---|
EP2034186A3 (en) | 2011-07-06 |
EP2034186B1 (en) | 2015-07-01 |
DE202007012542U1 (en) | 2007-11-08 |
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