EP1301710B2 - Pompe de dosage pourvue d'un moteur electrique - Google Patents

Pompe de dosage pourvue d'un moteur electrique Download PDF

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Publication number
EP1301710B2
EP1301710B2 EP01972410.3A EP01972410A EP1301710B2 EP 1301710 B2 EP1301710 B2 EP 1301710B2 EP 01972410 A EP01972410 A EP 01972410A EP 1301710 B2 EP1301710 B2 EP 1301710B2
Authority
EP
European Patent Office
Prior art keywords
pump
motor
metering
control
operating cycle
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
Application number
EP01972410.3A
Other languages
German (de)
English (en)
Other versions
EP1301710B1 (fr
EP1301710A2 (fr
Inventor
Bo Kragelund
Michael Christian Byskov
Hans Henrik Jochumsen
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.)
Grundfos AS
Original Assignee
Grundfos AS
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
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Application filed by Grundfos AS filed Critical Grundfos AS
Publication of EP1301710A2 publication Critical patent/EP1301710A2/fr
Publication of EP1301710B1 publication Critical patent/EP1301710B1/fr
Application granted granted Critical
Publication of EP1301710B2 publication Critical patent/EP1301710B2/fr
Anticipated expiration legal-status Critical
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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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • 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
    • F04B49/06—Control using electricity

Definitions

  • the invention relates to a metering pump according to the features specified in the preamble of claim 1.
  • metering pumps of both designs regularly have an input for an external pulse signal.
  • each pulse of the external pulse generator which emits pulses corresponding to the flow rate of the main flow at intervals over time, associated with a previously set metering, that is, a specific volume to be conveyed by the metering pump. While in the above-mentioned metering pumps with electromagnetic drive this per pulse delivered flow rate is usually entered by the mechanical stroke adjustment, this is possible with electric motor driven metering exclusively by changing the stroke speed, so the speed of the drive motor.
  • Stepper or servo motors with the necessary controls and electric motors with controllable speed are relatively expensive.
  • Stepper or servo motors with the necessary controls and electric motors with controllable speed are relatively expensive.
  • Stepper or servo motors with the necessary controls and electric motors with controllable speed are relatively expensive.
  • For metering pumps with electric motor drive without speed variance so such metering pumps simple design, therefore dispensed with the possibility of an external pulse control.
  • the invention has the object, a generic metering pump ( DE 33 13 993 A1 ), which is operated with a non-variable speed drive and the displacement is not changeable, with simple means in such a way that an external control by means of pulse signal is possible, in particular to ensure that the promotion carried out by the metering pump or mixing by no means the exceeds given values by the external control (impulse control).
  • the basic idea of the present invention is that only when a predetermined flow rate is delivered by the pump when at least as many pulses have been registered by the controller, that the resulting dosing (desired flow) equal to or greater than the preselected minimum flow of the Pump is.
  • the pump calibrated.
  • the amount actually pumped by the pump in one work cycle or possibly also part cycle is determined and stored in the controller.
  • a predetermined and preferably control side predetermined dosage amount (target flow rate) is assigned.
  • target flow rate the incoming pulses and the respective metering quantities resulting therefrom are added until the sum of the metered quantities has reached a value which is equal to or greater than the delivery rate of the pump in one working cycle. Then the pump is promoted promotional. The control then takes into account the amount that has been delivered by the pump in this work cycle and subtracts it accordingly from the total dosing quantity. In this way, remaining remnants of the metered amount are not lost, but are taken into account quantitatively. Conversely, in the control is also taken into account when the flow rate of the pump remains due to the limited by the power frequency motor speed below the impulse dosing dose, then, when the time intervals of the pulses are larger again, this shortage still promote.
  • a predetermined part of a duty cycle can be selected, since then the amount funded by the pump in this part of the duty cycle is defined.
  • the motor is not only driven to pass through a part of the working cycle (as the smallest Einhelt the flow rate), but in each case at least to go through a full cycle. Then the flow rate is determined by the stroke volume of the pump.
  • a full pump stroke will be carried out regardless of the position of the motor / pump at the beginning of the cycle, at least approaching the amount that the pump delivers during a full stroke. If it is what is usual in such pumps, for example, is a diaphragm pump, which is in the unloaded center position when the controller starts the engine, then first half a working stroke then driven a full return stroke and then turn the other half of a power stroke , so that the total delivery of a whole working stroke is promoted.
  • the dosing pump according to the invention can in principle be operated with electric motors of different design, for example with a DC motor or with an asynchronous motor.
  • a synchronous motor is used as the electric motor, since then an electronic switch is sufficient for the motor control to apply a predetermined alternating voltage, preferably the mains voltage, to the motor or to separate it from this. Since the synchronous motor runs at a constant speed at a given mains frequency, it is only necessary to turn it on for a predetermined time in order to achieve a constant speed to go through the full working stroke. Since the gear between electric motor and pump usually also includes a reduction, even in the pure time control, a relatively high accuracy of the metering is achieved, even if no position detection is provided.
  • the rotation of the motor is determined by the frequency of the supply voltage, it is particularly advantageous not to control this after a fixed time, but after a predetermined number of mains periods of the supply voltage This can ensure that even with frequency fluctuations in the network high dosing accuracy without position recognition.
  • the motor can be operated without any control-side changes with 50 Hz or 60 Hz mains frequency.
  • a metering pump whose basic structure, for example DE 196 23 537 A1 is known, is driven by a drive motor in the form of a synchronous motor.
  • the motor drives a reduction gear, which also converts the rotary motion into a lifting movement, which in turn drives a diaphragm pump.
  • the diaphragm pump delivers 1 ml during a full pump stroke.
  • a duty cycle of the pump consists of a return stroke in which the diaphragm pump draws liquid into the pump chamber and a working stroke in which the fluid in the pump chamber is discharged under pressure. Since the gearbox is a mechanically form-fitting, each motor rotation is assigned a defined partial stroke.
  • a duty cycle of the pump (return stroke and stroke) thus corresponds to one through the.
  • Mechanics predetermined number of motor rotations
  • the synchronous motor which can be operated with either 50, 60 or any other network frequency, has a control, which on the basis of the mains periods which have been supplied to the motor (ie in which the motor was line connected to the supply network) determines a duty cycle of the pump.
  • Each network period is associated with a defined rotation angle of the engine and thus, based on the engine data and the known mechanical gear ratio, it can be readily determined how many grid periods are required for the pump to go through a full duty cycle. So there is no position detection for the pump or the engine is required because when driving through the full cycle always a quantity of 1 ml is promoted. This amount is previously determined by calibration and entered in the controller.
  • this dosing pump to mix in a variable main flow, so a synchronization of the flow rates is required.
  • a pulse generator is usually provided in the external main flow, which emits a pulse whenever the external main flow has reached a predetermined amount, so that the metering pump promotes a corresponding Dosiermenge, d. H. this main flow admixed.
  • the dosage to be dispensed per pulse should be 0.3 ml.
  • the controller receives the first external impulse, first a dosing amount (target flow rate) of 0.3 ml is stored in the engine control. It is then checked if the contents of the reservoir are equal to or greater than the amount of 1 ml delivered by the pump in one cycle. If this is not the case, as in the above example, then the dosing quantity remains in the memory as the desired delivery rate.
  • target flow rate target flow rate
  • the metered amount in the reservoir is increased by 0.3 ml, after which it is again compared whether the resulting metered dose of 0.6 ml is greater than or equal to the amount of 1 ml delivered by the pump in one working cycle , This it is not the case that the dosing quantity remains in the memory. The same happens after receiving the third pulse.
  • the dosing amount in the reservoir has risen to 1.2 ml. Since this amount is greater than the amount of 1 ml delivered by the pump in one working cycle, the control now drives the electric motor for the number of mains periods corresponding to a full duty cycle of the pump. Then, the storage volume is reduced by the delivered amount of 1 ml, so that a dosage of 0.2 ml remains, which in turn is taken into account when receiving the following pulses.

Claims (4)

  1. Pompe de dosage comportant un moteur électrique, une transmission installée en aval de ce dernier afin de convertir le mouvement de rotation du rotor en une course de déplacement en translation, une pompe oscillante actionnée par cette transmission et une commande électronique, qui excite le moteur sous la dépendance d'un générateur d'impulsions externe, une quantité de dosage prédéfinie étant alors associée à chaque impulsion, et en ce que la commande excite le moteur d'une façon telle, que le moteur ne soit excité, pour le balayage d'une partie prédéfinie d'un cycle de travail de la pompe, que lorsque la commande a recueilli un nombre d'impulsions auxquelles correspond une quantité de dosage qui est identique ou supérieure à la quantité d'extraction que la pompe refoule sur la partie prédéfinie du cycle de travail, caractérisée en ce que la commande détermine une quantité de dosage correspondant aux impulsions reçues et soustrait de cette dernière la quantité déjà refoulée, afin de déterminer la quantité devant encore être refoulée et d'exciter éventuellement le moteur dans le sens du refoulement, et la quantité d'extraction de la pompe est étalonnée par détermination de la quantité refoulée par la pompe, par cycle de travail ou cycle partiel, et mise en mémoire de celle-ci dans la commande.
  2. Pompe de dosage selon la revendication 1, caractérisée en ce que, pour le balayage d'un cycle de travail complet de la pompe, la commande excite le moteur lorsqu'elle a recueilli un nombre d'impulsions auxquelles correspond une quantité de dosage qui est identique ou supérieure à la quantité refoulée par la pompe en un cycle de travail.
  3. Pompe de dosage selon l'une des revendications précédentes, caractérisée en ce que le moteur est un moteur synchrone.
  4. Pompe de dosage selon l'une des revendications précédentes, caractérisée en ce qu'un cycle de travail est défini sur la base des périodes de la tension d'alimentation secteur du moteur.
EP01972410.3A 2000-07-21 2001-07-13 Pompe de dosage pourvue d'un moteur electrique Expired - Lifetime EP1301710B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10035834 2000-07-21
DE10035834A DE10035834A1 (de) 2000-07-21 2000-07-21 Dosierpumpe mit einem Elektromotor
PCT/IB2001/001880 WO2002008601A2 (fr) 2000-07-21 2001-07-13 Pompe de dosage pourvue d'un moteur electrique

Publications (3)

Publication Number Publication Date
EP1301710A2 EP1301710A2 (fr) 2003-04-16
EP1301710B1 EP1301710B1 (fr) 2006-05-24
EP1301710B2 true EP1301710B2 (fr) 2016-08-10

Family

ID=7649925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01972410.3A Expired - Lifetime EP1301710B2 (fr) 2000-07-21 2001-07-13 Pompe de dosage pourvue d'un moteur electrique

Country Status (6)

Country Link
US (1) US6948914B2 (fr)
EP (1) EP1301710B2 (fr)
JP (1) JP4493911B2 (fr)
AU (1) AU2001292177A1 (fr)
DE (2) DE10035834A1 (fr)
WO (1) WO2002008601A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10322404B4 (de) * 2003-05-16 2011-02-03 Alldos Eichler Gmbh Dosierpumpe und Verfahren zu deren Steuerung
US10350352B2 (en) 2013-05-23 2019-07-16 Turnpoint Medical Devices, Inc. Pneumatically coupled fluid control system and process with air detection and elimination

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3138478A1 (de) † 1980-09-27 1982-05-19 Terumo Corp., Tokyo Verfahren und vorrichtung zum intermittierenden ausgeben einer medizinischen loesung in kleinen dosen
DE3313993A1 (de) † 1983-04-18 1984-10-18 Lang Apparatebau GmbH, 8227 Siegsdorf Einrichtung zum betreiben und ueberwachen einer dosiervorrichtung
DE19823156A1 (de) † 1998-05-23 1999-12-02 Lang Apparatebau Gmbh Dosierpumpe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2219042A1 (de) * 1972-04-19 1973-10-31 Chemie Elektronik Und Verfahre Digital steuerbare kolbendosierpumpe
US4389163A (en) * 1979-01-02 1983-06-21 Altex Scientific, Inc. Pressure booster system for fluids
DE3139925A1 (de) 1981-10-08 1983-07-14 Hewlett-Packard GmbH, 7030 Böblingen Hochdruck-dosierpumpe
US4482346A (en) * 1982-07-30 1984-11-13 Consolidated Controls Corporation Apparatus for infusing medication into the body
EP0583003A1 (fr) * 1992-08-13 1994-02-16 Perseptive Biosystems, Inc. Système pour le dosage, le mélange et le contrôle de la composition de fluides
US5707212A (en) * 1995-05-12 1998-01-13 Matthews; Ernest L. Apparatus for precisely controlling the feeding of viscous and non-viscous liquid products into a packaging machine
US6095757A (en) * 1995-07-10 2000-08-01 Compagnie Developpement Aguettant Liquid drug infusion pump
DE19623537C2 (de) * 1996-06-13 2002-03-28 Bwt Wassertechnik Gmbh Dosierpumpe und Dosierverfahren für Flüssigkeiten
DE19706513C2 (de) * 1997-02-19 1999-06-17 Hahn Schickard Ges Mikrodosiervorrichtung und Verfahren zum Betreiben derselben

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3138478A1 (de) † 1980-09-27 1982-05-19 Terumo Corp., Tokyo Verfahren und vorrichtung zum intermittierenden ausgeben einer medizinischen loesung in kleinen dosen
DE3313993A1 (de) † 1983-04-18 1984-10-18 Lang Apparatebau GmbH, 8227 Siegsdorf Einrichtung zum betreiben und ueberwachen einer dosiervorrichtung
DE19823156A1 (de) † 1998-05-23 1999-12-02 Lang Apparatebau Gmbh Dosierpumpe

Also Published As

Publication number Publication date
EP1301710B1 (fr) 2006-05-24
US20040028530A1 (en) 2004-02-12
JP4493911B2 (ja) 2010-06-30
DE50109888D1 (de) 2006-06-29
EP1301710A2 (fr) 2003-04-16
US6948914B2 (en) 2005-09-27
DE10035834A1 (de) 2002-02-07
AU2001292177A1 (en) 2002-02-05
WO2002008601A2 (fr) 2002-01-31
JP2004504543A (ja) 2004-02-12
WO2002008601A3 (fr) 2002-06-20

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