EP1301710A2 - Pompe de dosage pourvue d'un moteur electrique - Google Patents

Pompe de dosage pourvue d'un moteur electrique

Info

Publication number
EP1301710A2
EP1301710A2 EP01972410A EP01972410A EP1301710A2 EP 1301710 A2 EP1301710 A2 EP 1301710A2 EP 01972410 A EP01972410 A EP 01972410A EP 01972410 A EP01972410 A EP 01972410A EP 1301710 A2 EP1301710 A2 EP 1301710A2
Authority
EP
European Patent Office
Prior art keywords
pump
motor
amount
dosing
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.)
Granted
Application number
EP01972410A
Other languages
German (de)
English (en)
Other versions
EP1301710B1 (fr
EP1301710B2 (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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7649925&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1301710(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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
Expired - Lifetime legal-status Critical Current

Links

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 preamble of
  • Claim 1 specified features.
  • the delivery rate is controlled via the frequency with which the lifting magnet is driven, and in addition the stroke volume can generally be changed by means of a mechanical adjusting screw, i. H. the delivery rate per work cycle.
  • a mechanical stroke adjustment is not normally provided in the case of the electric motor-driven metering pumps of the generic type, it would also be comparatively complex technically.
  • the oscillating movement of the pump is generated by a gear mechanism in the manner of a crank mechanism or a corresponding link guide, the rotary movement of the motor usually being further reduced in order to enable the pump to be controlled more sensitively.
  • the delivery rate is controlled by changing the engine speed. When using stepper motors, the interval between the motor steps is varied accordingly.
  • the latter design is comparatively expensive due to the engine and also requires complex electronic control.
  • metering pumps of both types regularly have an input for an external pulse signal.
  • Each pulse of the external pulse generator is timed in accordance with the flow rate of the main flow
  • Stepper or servo motors with the necessary controls as well as electric motors with controllable speed are comparatively expensive.
  • the option of external pulse control is therefore dispensed with.
  • the invention is based on the object of designing a generic metering pump which is operated with a drive which cannot be regulated in terms of speed and whose stroke volume cannot be changed, in such a way that external control by means of a pulse signal is also possible; that the delivery or admixture carried out by the metering pump never exceeds the values specified by the external control (pulse control).
  • the metering pump is equipped with a position detection which allows the motor position to be assigned to the stroke position of the pump, a predetermined part of a work cycle can be selected, since the quantity delivered by the pump in this part of the work cycle is then defined.
  • the motor is preferably not only driven to go through part of the working cycle (as the smallest unit of the delivery quantity) but in each case at least to go through a full working cycle. Then the delivery rate is determined by the stroke volume of the pump.
  • Such a control has the advantage that it can be implemented technically with little effort, since, with a suitable choice of the components used, the position of the motor and / or pump can be completely dispensed with.
  • a full pump stroke was carried out in each case and thus at least approximately delivered the amount that the pump emitted during a complete working stroke. If it is, which is common in such pumps, for example a diaphragm pump which is in the unloaded middle position when the control starts the motor, then half a working stroke is carried out, then a full return stroke and then the other half of a working stroke , so that the total amount of an entire work stroke is promoted.
  • the metering pump according to the invention can in principle be operated with electric motors of different types, for example with a direct current motor or with an asynchronous motor.
  • a synchronous motor is advantageously used as an electric motor because then for the motor control an electronic switch is sufficient to apply a predetermined alternating voltage, preferably the mains voltage, to the motor or to separate it from the motor. Since the synchronous motor runs at a constant speed at a predetermined mains frequency, it must only be switched on for a predetermined time in order to cover a full working stroke. Since the gearbox between the electric motor and the pump usually also includes a reduction, a relatively high accuracy of the dosing process is achieved even with the pure timing control, even if no position detection is provided.
  • the rotation of the motor is determined by the frequency of the supply voltage, it is particularly favorable to control it not after a fixed time, but after a predetermined number of network periods of the supply voltage. This ensures that there is high dosing accuracy without position detection even in the event of frequency fluctuations in the network.
  • the motor can be operated at 50 Hz or 60 Hz mains frequency without any changes on the control side.
  • the pump In order to further increase the accuracy of the metering, it is advisable to equip the pump with a calibrator.
  • the quantity actually pumped by the pump in a work cycle or possibly also a partial cycle is determined and stored in the control.
  • a predetermined and preferably predeterminable metering quantity (target delivery quantity) is assigned in the control to each external pulse.
  • the incoming impulses and the resulting dosing quantities are added within the control unit until the sum of the dosing quantities has reached a value that is equal to or greater than the delivery quantity of the pump in one work cycle. Then the
  • control then takes into account the amount that has been pumped by the pump in this work cycle and subtracted it accordingly from the total metered amount. In this way, remaining remnants of the metered quantity are not lost, but are taken into account in terms of quantity.
  • control system also takes into account if the delivery rate of the pump remains below the pulse-fed metering rate due to the motor speed limited by the mains frequency, and then if the time
  • a metering pump the basic structure of which is known, for example, from DE 196 23537 AI, is driven by a drive motor in the form of a synchronous motor.
  • the motor drives a reduction gear, which also converts the rotary movement into a lifting movement, which in turn drives a diaphragm pump.
  • the diaphragm pump delivers 1 ml with a full pump stroke
  • Pump consists of a return stroke, in which the diaphragm pump draws liquid into the pump chamber, and a working stroke, in which the liquid in the pump chamber is discharged under pressure.
  • gearbox is a mechanically positive one, a defined partial stroke is assigned to each motor rotation.
  • the synchronous motor which can optionally be operated at 50, 60 or another mains frequency, has a controller which is based on the mains periods which have been supplied to the motor (i.e. in which the motor with the
  • a pulse generator is usually provided in the remote main conveyor, which always emits a pulse when the remote main conveyor has reached a predetermined amount, so that the metering pump delivers a corresponding metered amount, i. H. mixed into this main flow.
  • the dosage to be dispensed per pulse should be 0.3 ml.
  • a dosing quantity (target delivery quantity) of 0.3 ml is first stored in the motor control. It is then checked whether the memory content matches or is greater than the amount of 1 ml delivered by the pump in one work cycle. If this is not the case, as in the previous example, the dosing quantity remains in the memory as the target delivery quantity.
  • the dosing quantity in the memory is first increased by 0.3 ml, after which it is compared whether the resulting dosing quantity of 0.6 ml is greater than or equal to the quantity of 1 ml delivered by the pump in one working cycle , This is not the case so that the dosage remains in the memory. The same happens after receipt of the third pulse.
  • the dosage in the memory has risen to 1.2 ml. Since this amount is greater than the amount of 1 ml delivered by the pump in one work cycle, the control unit now controls the electric motor for the number of mains periods that correspond to a full work cycle of the pump. Then the memory content is reduced by the delivered amount of 1 ml, so that a Dosing quantity of 0.2 ml remains which is then taken into account when receiving the following impulses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

La présente invention concerne une pompe de dosage présentant un moteur synchrone, qui est démultiplié par une transmission mécanique et qui transforme le mouvement de rotation du moteur en un mouvement de course permettant d'entraîner une pompe à membrane. Le moteur est équipé d'une commande électronique, qui permet de commander le débit de refoulement, au moyen d'impulsions externes. La commande fonctionne de façon qu'un cycle de travail de la pompe est toujours effectué lorsque le débit de refoulement théorique, induit par les impulsions reçues, est supérieur ou égal au débit que refoule la pompe dans un cycle de travail.
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
DE10035834A DE10035834A1 (de) 2000-07-21 2000-07-21 Dosierpumpe mit einem Elektromotor
DE10035834 2000-07-21
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 true EP1301710A2 (fr) 2003-04-16
EP1301710B1 EP1301710B1 (fr) 2006-05-24
EP1301710B2 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
CA3117790C (fr) 2013-05-23 2022-02-22 Newiv Medical Corp. Systeme et procede de commande de fluide a couplage pneumatique, ayant une detection et une elimination de l'air

Family Cites Families (12)

* 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
JPS5759539A (en) † 1980-09-27 1982-04-09 Terumo Corp Method and apparatus for intermittently pouring minute amount of drug liquid
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
DE3313993A1 (de) 1983-04-18 1984-10-18 Lang Apparatebau GmbH, 8227 Siegsdorf Einrichtung zum betreiben und ueberwachen einer dosiervorrichtung
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
ATE190228T1 (de) * 1995-07-10 2000-03-15 Aguettant Lab Infusionspumpe für medizinische flüssigkeiten
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
DE19823156A1 (de) † 1998-05-23 1999-12-02 Lang Apparatebau Gmbh Dosierpumpe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0208601A2 *

Also Published As

Publication number Publication date
DE50109888D1 (de) 2006-06-29
US20040028530A1 (en) 2004-02-12
JP4493911B2 (ja) 2010-06-30
DE10035834A1 (de) 2002-02-07
WO2002008601A2 (fr) 2002-01-31
EP1301710B1 (fr) 2006-05-24
US6948914B2 (en) 2005-09-27
EP1301710B2 (fr) 2016-08-10
JP2004504543A (ja) 2004-02-12
WO2002008601A3 (fr) 2002-06-20
AU2001292177A1 (en) 2002-02-05

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