EP2886859B1 - Dosing pump for conveying pasty media with high demands on hygiene and operational reliability - Google Patents

Dosing pump for conveying pasty media with high demands on hygiene and operational reliability Download PDF

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Publication number
EP2886859B1
EP2886859B1 EP14003758.1A EP14003758A EP2886859B1 EP 2886859 B1 EP2886859 B1 EP 2886859B1 EP 14003758 A EP14003758 A EP 14003758A EP 2886859 B1 EP2886859 B1 EP 2886859B1
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European Patent Office
Prior art keywords
sensors
hose
pump
position sensor
plunger
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EP14003758.1A
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German (de)
French (fr)
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EP2886859A3 (en
EP2886859A2 (en
Inventor
Jürgen Schonlau
Markus Ermert
Wolfgang Hamm
Marc Leinweber
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Thomas Magnete GmbH
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Thomas Magnete GmbH
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    • 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
    • F04B49/065—Control using electricity and making use of computers
    • 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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0081—Special features systems, control, safety measures
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing

Definitions

  • the invention relates to a peristaltic pump according to the preamble of the first claim.
  • Peristaltic pumps are known and are preferably used for the promotion of pasty media, especially in medicine and in the care sector.
  • the pamphlets DE 741972 and EP 1 317 626 show exemplary peristaltic pumps.
  • the publication EP 0013 002 A1 and the publication US 5,709,539 A describe peristaltic pumps with a membrane protecting the hose.
  • the publication US 2007/0098565 A1 describes a peristaltic pump with function keys that contain sensors.
  • the function of the peristaltic pump must be monitored in many applications, including suction side disturbances, pressure side faults, air pockets in the medium, closing the hood of the working chamber, opening the hose clamp and disturbing the drive system.
  • several sensors are used, which are known as such.
  • the number of sensors affects the cost of the pump and the failure probability of the sensors, in some applications the probability of failure of the sensors is higher than the probability of failure of the pump drive.
  • the hose has to be changed regularly and the working area where the hose is deformed has to be cleaned regularly.
  • the sensors are arranged in close proximity to the hose and thus make it more difficult to change the hose and to clean the working space.
  • the membrane also facilitates the cleaning of the working space considerably, because thereby the surfaces to be cleaned have only a few structural elements.
  • the joint arrangement of the sensors behind the membrane, the advantageous arrangement of all sensors is facilitated on a common board.
  • Another advantage for the design of the pump is obtained if one also arranges the electrical control for powering the sensors, for the evaluation of the sensor signals and for generating messages on said common board.
  • the number of sensors can be reduced by using the mutual influence of the states to be monitored.
  • the suction-side pressure in the hose affects the tension of the suction-side arranged hose clamp, and a measurement of this tension allows a conclusion on the suction-side pressure.
  • Another example of the use of mutual interference is the effect of the pressures in the hose in front of and behind the rollers on the distance of the rollers from the bearing of the hose, if the sum of the pressures is too high, the said distance increases.
  • the described mutual influences can also be used instead of reducing the number of sensors to monitor the sensors themselves or to improve the safety of the pump monitoring.
  • the influences must be known, they can be measured during the development of the pump and then store in the form of tables or functions in the electrical control and use in the evaluation.
  • the mutual influences depend on the mass and the viscosity of the medium to be pumped, the tables or functions must take this into account.
  • the pump according to the invention can be used in medical technology and in the care sector for the delivery and metering of highly viscous or pasty media.
  • Fig. 1 shows the working space of the pump according to the invention.
  • a pump according to Fig. 1 serves to convey a liquid or pasty medium, which is surrounded by a in a working space (5) mounted elastic hose (1).
  • the tube is deformed by moving rollers (2) and a plurality of sensors monitors the correct operation of the pump.
  • rollers with their drive (3) and the sensors are separated by a membrane (4) of the working space (5), so that the working space can be easily and thoroughly cleaned.
  • the signals of the sensors are processed by an electric drive, not shown, and the sensors are preferably arranged on a common board.
  • the common board advantageously also contains the electrical control for powering the sensors, for evaluating the sensor signals and for reporting faults.
  • the plunger (13) opens the hose clamp (14) when the movable hood (6) is closed because a surface (23) on the hood presses the hose clamp against the plunger. This ensures that the hose clamp is only permanently opened when the hood is closed.
  • the path sensor (12) for monitoring the hose clamp can check the function of the displacement sensor (15) for monitoring the suction side of the hose or take over when a closing spring (24) of the hose clamp (14) with a compression spring (25) of the plunger (13) and with the elastic tube (1) in the closed state of the hood (6) assume a force equilibrium, namely at a position of the plunger (13), which is not determined by a mechanical stop. Because of the force-determined variable position of the plunger (13), the pressure in the hose affects the force balance and the position of the plunger.
  • the path sensor (19) for monitoring the position of the carrier (21) can check the function of the displacement sensor (17) for monitoring the pressure side and / or the displacement sensor (12) for monitoring the hose clamp or take over when the carrier (21) acted upon compression spring (26) during operation of the pump with the elastic tube occupies a force equilibrium, in a position of the carrier (21), which is not determined by a mechanical stop. Because of the force-determined variable position of the wearer, the pressure in the hose affects the said force balance and the position of the carrier (21).
  • the signals of the displacement sensors (15), (17) and (19) are processed together to obtain statements about disturbances of the pump with greater certainty and / or to detect the failure of one of the sensors.
  • the electrical control contains in the development phase of the pump determined tables or mathematical functions that describe desired states of the sensors as a function of the density and the viscosity of the pumped medium.
  • the electrical control is configured to report detected disturbances by electrical signals to a higher-level control or optical displays.
  • the electrical control is to take over the described Tasks are preferably equipped with a microcontroller and an information memory for the tables, the setting data and the control program contained therein or connected thereto.
  • the target states of several sensors of the pump depending on the density and the viscosity of the pumped medium describe and during operation of the pump, the measured values of the sensors of the electrical control with the said tables or the mathematical functions are compared, whereby failures or malfunctions of individual sensors are detected and reported or malfunctions in the operation of the pump with greater certainty than in the evaluation of individual sensors are detected and reported.

Description

Die Erfindung betrifft eine Schlauchpumpe entsprechend dem Oberbegriff des ersten Patentanspruchs.The invention relates to a peristaltic pump according to the preamble of the first claim.

Stand der TechnikState of the art

Schlauchpumpen sind bekannt und werden bevorzugt zur Förderung von pastösen Medien eingesetzt, vor allem in der Medizin und im Pflegebereich. Die Druckschriften DE 741972 und EP 1 317 626 zeigen beispielhafte Schlauchpumpen.Peristaltic pumps are known and are preferably used for the promotion of pasty media, especially in medicine and in the care sector. The pamphlets DE 741972 and EP 1 317 626 show exemplary peristaltic pumps.

Die Druckschrift US 2013/023848 A1 beschreibt eine Schlauchpumpe mit einem elektrischen Antriebsmotor, der durch Sensoren überwacht wird.The publication US 2013/023848 A1 describes a peristaltic pump with an electric drive motor monitored by sensors.

Die Druckschrift EP 0013 002 A1 und die Druckschrift US 5 709 539 A beschreiben Schlauchpumpen mit einer den Schlauch schützenden Membran. Die Druckschrift US 2007/0098565 A1 beschreibt eine Schlauchpumpe mit Funktionstasten, die Sensoren enthalten.The publication EP 0013 002 A1 and the publication US 5,709,539 A describe peristaltic pumps with a membrane protecting the hose. The publication US 2007/0098565 A1 describes a peristaltic pump with function keys that contain sensors.

Die Funktion der Schlauchpumpe muss in vielen Anwendungen überwacht werden, und zwar auf saugseitige Störungen, auf druckseitige Störungen, auf Lufteinschlüsse im Medium, auf ein Schließen der Haube des Arbeitsraums, die Öffnung der Schlauchklemme und auf Störungen des Antriebssystems. Dazu werden mehrere Sensoren eingesetzt, die als solche bekannt sind. Die Zahl der Sensoren beeinflusst die Kosten der Pumpe und die Ausfallwahrscheinlichkeit der Sensoren, wobei in manchen Anwendungen die Ausfallwahrscheinlichkeit der Sensoren höher ist als die Ausfallwahrscheinlichkeit des Pumpenantriebs.The function of the peristaltic pump must be monitored in many applications, including suction side disturbances, pressure side faults, air pockets in the medium, closing the hood of the working chamber, opening the hose clamp and disturbing the drive system. For this purpose, several sensors are used, which are known as such. The number of sensors affects the cost of the pump and the failure probability of the sensors, in some applications the probability of failure of the sensors is higher than the probability of failure of the pump drive.

Der Schlauch muss regelmäßig ausgewechselt werden und der Arbeitsraum, in dem der Schlauch verformt wird, muss regelmäßig gereinigt werden. In bekannten Schlauchpumpen sind die Sensoren in unmittelbarer Nähe zu dem Schlauch angeordnet und sie erschweren damit den Schlauchwechsel und die Reinigung des Arbeitsraums.The hose has to be changed regularly and the working area where the hose is deformed has to be cleaned regularly. In known peristaltic pumps, the sensors are arranged in close proximity to the hose and thus make it more difficult to change the hose and to clean the working space.

Aufgabetask

Mittels dieser Erfindung soll das Auswechseln des Schlauchs und die Reinigung des Arbeitsraums erleichtert werden. Außerdem soll entweder die Zahl der Sensoren vermindert werden oder bei einer unverminderten Zahl der Sensoren die Sicherheit der Überwachung durch die Sensoren verbessert werden, wobei sich mindestens einige Sensoren gegenseitig überwachen.By means of this invention, the replacement of the hose and the cleaning of the working space to be facilitated. In addition, either the number of Sensors are reduced or improved with an undiminished number of sensors, the safety of the monitoring by the sensors, with at least some sensors monitor each other.

Lösungsolution

Die Lösung der Aufgabe wird durch die kennzeichnenden Merkmale des ersten Patentanspruchs beschrieben, die Unteransprüche bilden die technische Lehre fort. Das Auswechseln des Schlauches wird vor allem dadurch erleichtert, dass die Sensoren hinter einer Membran außerhalb des Arbeitsraums angeordnet sind und dass auch die Rollen zur Verformung des Schlauchs hinter dieser Membran liegen. Bei dem Auswechseln wird lediglich die Haube geöffnet, der alte Schlauch mit seiner Schlauchklemme herausgenommen, der neue Schlauch mit seiner Schlauchklemme eingelegt und die Haube geschlossen. Beim Schließen der Haube wird die Schlauchklemme geöffnet, weil eine Funktionsfläche der Haube die Schlauchklemme gegen einen Stößel drückt und dieser Stößel die Schlauchklemme öffnet.The solution of the problem is described by the characterizing features of the first claim, the dependent claims form the technical teaching. The replacement of the hose is facilitated primarily by the fact that the sensors are arranged behind a membrane outside the working space and that the rollers for deformation of the hose are behind this membrane. When replacing only the hood is opened, removed the old hose with its hose clamp, inserted the new hose with its hose clamp and closed the hood. When closing the hood, the hose clamp is opened because a functional surface of the hood pushes the hose clamp against a plunger and this plunger opens the hose clamp.

Die Membran erleichtert auch die Reinigung des Arbeitsraums erheblich, weil dadurch die zu reinigenden Flächen nur wenige Strukturelemente aufweisen. Durch die gemeinsame Anordnung der Sensoren hinter der Membran wird die vorteilhafte Anordnung aller Sensoren auf einer gemeinsamen Platine erleichtert.The membrane also facilitates the cleaning of the working space considerably, because thereby the surfaces to be cleaned have only a few structural elements. The joint arrangement of the sensors behind the membrane, the advantageous arrangement of all sensors is facilitated on a common board.

Ein weiterer Vorteil für die Bauweise der Pumpe ergibt sich, wenn man auch die elektrische Ansteuerung zur Energieversorgung der Sensoren, zur Auswertung der Sensorsignale und zur Erzeugung von Meldungen auf der genannten gemeinsamen Platine anordnet.Another advantage for the design of the pump is obtained if one also arranges the electrical control for powering the sensors, for the evaluation of the sensor signals and for generating messages on said common board.

Es ist vorteilhaft, alle Sensoren mit einer gemeinsamen elektrischen Ansteuerung zu verbinden, aber es kann auch erforderlich sein, die elektrische Ansteuerung in mehrere Baugruppen aufzuteilen, die elektrisch und signaltechnisch verbunden sind.It is advantageous to connect all sensors with a common electrical control, but it may also be necessary to divide the electrical control into several modules that are electrically and signal technically connected.

Die Zahl der Sensoren lässt sich vermindern, wenn man die gegenseitige Beeinflussung der zu überwachenden Zustände nutzt. So wirkt sich zum Beispiel der saugseitige Druck im Schlauch auf die Spannung der saugseitig angeordneten Schlauchklemme aus, und eine Messung dieser Spannung erlaubt einen Rückschluss auf den saugseitigen Druck.The number of sensors can be reduced by using the mutual influence of the states to be monitored. Thus, for example, the suction-side pressure in the hose affects the tension of the suction-side arranged hose clamp, and a measurement of this tension allows a conclusion on the suction-side pressure.

Ein anderes Beispiel für die Nutzung der gegenseitigen Beeinflussungen ist die Wirkung der Drücke im Schlauch vor und hinter den Rollen auf den Abstand der Rollen von dem Lager des Schlauchs, ist die Summe der Drücke zu hoch, erhöht sich der genannte Abstand.Another example of the use of mutual interference is the effect of the pressures in the hose in front of and behind the rollers on the distance of the rollers from the bearing of the hose, if the sum of the pressures is too high, the said distance increases.

Die beschriebenen gegenseitigen Beeinflussungen können statt zur Verminderung der Zahl der Sensoren auch dazu genutzt werden, die Sensoren selbst zu überwachen oder die Sicherheit der Pumpen-Überwachung zu verbessern. Dabei müssen die Beeinflussungen allerdings bekannt sein, sie lassen sich während der Entwicklung der Pumpe messen und dann in der Form von Tabellen oder Funktionen in der elektrischen Ansteuerung ablegen und bei der Auswertung nutzen. Die gegenseitigen Beeinflussungen sind von der Masse und der Viskosität des zu pumpenden Mediums abhängig, die Tabellen oder Funktionen müssen das berücksichtigen.The described mutual influences can also be used instead of reducing the number of sensors to monitor the sensors themselves or to improve the safety of the pump monitoring. However, the influences must be known, they can be measured during the development of the pump and then store in the form of tables or functions in the electrical control and use in the evaluation. The mutual influences depend on the mass and the viscosity of the medium to be pumped, the tables or functions must take this into account.

Anwendungapplication

Die erfindungsgemäße Pumpe ist in der Medizintechnik und im Pflegebereich zur Förderung und Dosierung von hochviskosen oder pastösen Medien einsetzbar.The pump according to the invention can be used in medical technology and in the care sector for the delivery and metering of highly viscous or pasty media.

Bilder: Fig. 1 zeigt den Arbeitsraum der erfindungsgemäßen Pumpe.Images: Fig. 1 shows the working space of the pump according to the invention.

Beispielhafte AusführungExemplary embodiment

Eine Pumpe gemäß Fig. 1 dient zur Förderung eines flüssigen oder pastösen Mediums, das von einem in einem Arbeitsraum (5) gelagerten elastischen Schlauch (1) umfasst ist. Dabei wird der Schlauch durch bewegliche Rollen (2) verformt und eine Mehrzahl von Sensoren überwacht die fehlerfreie Funktion der Pumpe.A pump according to Fig. 1 serves to convey a liquid or pasty medium, which is surrounded by a in a working space (5) mounted elastic hose (1). The tube is deformed by moving rollers (2) and a plurality of sensors monitors the correct operation of the pump.

Die Rollen mit ihrem Antrieb (3) und die Sensoren sind durch eine Membran (4) von dem Arbeitsraum (5) abgetrennt, damit der Arbeitsraum leicht und gründlich gereinigt werden kann.The rollers with their drive (3) and the sensors are separated by a membrane (4) of the working space (5), so that the working space can be easily and thoroughly cleaned.

Der Arbeitsraum ist auch durch eine bewegliche Haube (6) begrenzt, die nach dem Einlegen des Schlauchs geschlossen wird und den Arbeitsraum schützt. Auf einer Platine unter der Membran (4) sind vorzugsweise folgende Sensoren angeordnet:

  • ein kapazitiver Sensor (11) zum Erkennen von Luftblasen im Schlauch.
  • ein elektromechanischer Wegsensor (12), der die Position eines kraftbetätigten Stößels (13) überwacht, wobei der Stößel (13) das Vorhandensein, die Lage und die Arbeitsstellung einer Schlauchklemme (14) abtastet.
  • ein elektromechanischer Wegsensor (15), der die Position eines kraftbetätigten Stößels (16) überwacht, der den Schlauch (1) saugseitig der Rollen (2) abtastet, um Förderstörungen auf der Saugseite zu erkennen.
  • einen elektromechanischen Wegsensor (17), der die Position eines kraftbetätigten Stößels (18) überwacht, der den Schlauch (1) druckseitig der Rollen (2) abtastet, um Förderstörungen auf der Druckseite zu erkennen.
  • ein elektromechanischer Wegsensor (19), der die Lage eines federbelasteten schwenkbaren Trägers (21) abtastet, der einen Rollenkopf (22) lagert, wobei der Rollenkopf die Rollen (2) führt, und wobei der Wegsensor (19) vorrangig Störungen in der Funktion der Rollen oder des Rollenkopfes erkennen soll.
The working space is also limited by a movable hood (6), which is closed after inserting the hose and protects the working space. The following sensors are preferably arranged on a circuit board under the membrane (4):
  • a capacitive sensor (11) for detecting air bubbles in the hose.
  • an electromechanical displacement sensor (12) monitoring the position of a power operated plunger (13), the plunger (13) sensing the presence, location and working position of a hose clamp (14).
  • an electromechanical displacement sensor (15) which monitors the position of a power operated plunger (16) which scans the hose (1) on the suction side of the rollers (2) to detect conveyor disturbances on the suction side.
  • an electromechanical displacement sensor (17) which monitors the position of a power operated plunger (18) which scans the hose (1) on the pressure side of the rollers (2) to detect delivery faults on the pressure side.
  • an electromechanical displacement sensor (19) which scans the position of a spring-loaded pivotable carrier (21) which supports a roller head (22), wherein the roller head guides the rollers (2), and wherein the displacement sensor (19) primarily interference in the function of To recognize roles or the role head.

Die Signale der Sensoren werden durch eine nicht dargestellte elektrische Ansteuerung verarbeitet, und die Sensoren sind vorzugsweise auf einer gemeinsamen Platine angeordnet.The signals of the sensors are processed by an electric drive, not shown, and the sensors are preferably arranged on a common board.

Die gemeinsame Platine enthält vorteilhafterweise auch die elektrische Ansteuerung zur Energieversorgung der Sensoren, zur Auswertung der Sensorsignale und zur Meldung von Störungen.The common board advantageously also contains the electrical control for powering the sensors, for evaluating the sensor signals and for reporting faults.

Der Stößel (13) öffnet die Schlauchklemme (14), wenn die bewegliche Haube (6) geschlossen wird, weil eine Fläche (23) an der Haube die Schlauchklemme gegen den Stößel drückt. Damit wird sichergestellt, dass die Schlauchklemme nur dauerhaft geöffnet wird, wenn die Haube geschlossen ist.The plunger (13) opens the hose clamp (14) when the movable hood (6) is closed because a surface (23) on the hood presses the hose clamp against the plunger. This ensures that the hose clamp is only permanently opened when the hood is closed.

Der Wegsensor (12) zur Überwachung der Schlauchklemme kann die Funktion des Wegsensors (15) zur Überwachung der Saugseite des Schlauches überprüfen oder mit übernehmen, wenn eine Schließfeder (24) der Schlauchklemme (14) mit einer Druckfeder (25) des Stößels (13) und mit dem elastischen Schlauch (1) im geschlossenen Zustand der Haube (6) ein Kraftgleichgewicht einnehmen, und zwar bei einer Lage des Stößels (13), die nicht durch einen mechanischen Anschlag bestimmt ist. Wegen der kraftbestimmten veränderlichen Lage des Stößels (13) wirkt sich der Druck im Schlauch auf das Kraftgleichgewicht und auf die Lage des Stößels aus.The path sensor (12) for monitoring the hose clamp can check the function of the displacement sensor (15) for monitoring the suction side of the hose or take over when a closing spring (24) of the hose clamp (14) with a compression spring (25) of the plunger (13) and with the elastic tube (1) in the closed state of the hood (6) assume a force equilibrium, namely at a position of the plunger (13), which is not determined by a mechanical stop. Because of the force-determined variable position of the plunger (13), the pressure in the hose affects the force balance and the position of the plunger.

Der Wegsensor (19) zur Überwachung der Lage des Trägers (21) kann die Funktion des Wegsensors (17) zur Überwachung der Druckseite und/oder des Wegsensors (12) zur Überwachung der Schlauchklemme überprüfen oder mit übernehmen, wenn die den Träger (21) beaufschlagende Druckfeder (26) im Betrieb der Pumpe mit dem elastischen Schlauch ein Kraftgleichgewicht einnimmt, und zwar bei einer Lage des Trägers (21), die nicht durch einen mechanischen Anschlag bestimmt ist. Wegen der kraftbestimmten veränderlichen Lage des Trägers wirkt sich der Druck im Schlauch auf das genannte Kraftgleichgewicht und auf die Lage des Trägers (21) aus.The path sensor (19) for monitoring the position of the carrier (21) can check the function of the displacement sensor (17) for monitoring the pressure side and / or the displacement sensor (12) for monitoring the hose clamp or take over when the carrier (21) acted upon compression spring (26) during operation of the pump with the elastic tube occupies a force equilibrium, in a position of the carrier (21), which is not determined by a mechanical stop. Because of the force-determined variable position of the wearer, the pressure in the hose affects the said force balance and the position of the carrier (21).

In der elektrischen Ansteuerung werden vorteilhafterweise die Signale der Wegsensoren (15), (17) und (19) miteinander verarbeitet, um Aussagen über Störungen der Pumpe mit größerer Sicherheit zu erhalten und/oder den Ausfall eines der Sensoren zu erkennen. Dazu enthält die elektrische Ansteuerung in der Entwicklungsphase der Pumpe ermittelte Tabellen oder mathematische Funktionen, die Sollzustände der Sensoren in Abhängigkeit von der Dichte und der Viskosität des geförderten Mediums beschreiben. Die elektrische Ansteuerung ist dazu eingerichtet, erkannte Störungen durch elektrische Signale an eine übergeordnete Steuerung oder an optische Anzeigen zu melden. Die elektrische Ansteuerung ist zur Übernahme der beschriebenen Aufgaben vorzugsweise mit einem Mikrokontroller und einem darin enthaltenen oder daran angeschlossenen Informationsspeicher für die Tabellen, die Einstelldaten und das Steuerprogramm ausgerüstet.In the electrical control advantageously the signals of the displacement sensors (15), (17) and (19) are processed together to obtain statements about disturbances of the pump with greater certainty and / or to detect the failure of one of the sensors. For this purpose, the electrical control contains in the development phase of the pump determined tables or mathematical functions that describe desired states of the sensors as a function of the density and the viscosity of the pumped medium. The electrical control is configured to report detected disturbances by electrical signals to a higher-level control or optical displays. The electrical control is to take over the described Tasks are preferably equipped with a microcontroller and an information memory for the tables, the setting data and the control program contained therein or connected thereto.

Verfahren zum BetriebMethod of operation

In der Entwicklungsphase der Pumpe werden Tabellen oder mathematische Funktionen ermittelt, die Sollzustände mehrerer Sensoren der Pumpe in Abhängigkeit von der Dichte und der Viskosität des geförderten Mediums beschreiben und im Betrieb der Pumpe werden die Messwerte der Sensoren von der elektrischen Ansteuerung mit den genannten Tabellen oder den mathematischen Funktionen verglichen, wobei Ausfälle oder Fehlfunktionen einzelner Sensoren erkannt und gemeldet werden oder Störungen im Betrieb der Pumpe mit größerer Sicherheit als bei der Auswertung von Einzelsensoren entdeckt und gemeldet werden.In the development phase of the pump tables or mathematical functions are determined, the target states of several sensors of the pump depending on the density and the viscosity of the pumped medium describe and during operation of the pump, the measured values of the sensors of the electrical control with the said tables or the mathematical functions are compared, whereby failures or malfunctions of individual sensors are detected and reported or malfunctions in the operation of the pump with greater certainty than in the evaluation of individual sensors are detected and reported.

Liste der BezugszeichenList of reference numbers

1.1.
Schlauchtube
2.Second
Rollerole
3.Third
Antriebdrive
4.4th
Membranmembrane
5.5th
Arbeitsraumworking space
6.6th
HaubeHood
11.11th
Kapazitiver SensorCapacitive sensor
12.12th
Wegsensordisplacement sensor
13.13th
Stößeltappet
14.14th
Schlauchklemmehose clamp
15.15th
Wegsensordisplacement sensor
16.16th
Stößeltappet
17.17th
Wegsensordisplacement sensor
18.18th
Stößeltappet
19.19th
Wegsensordisplacement sensor
21.21st
Trägercarrier
22.22nd
Rollenkopfroller head
23.23rd
Fläche (zur Betätigung)Area (for operation)
24.24th
Schließfederclosing spring
25.25th
Druckfeder (für Stößel (13))Compression spring (for ram (13))
26.26th
Druckfeder (für Träger (21))Compression spring (for carrier (21))

Claims (8)

  1. Pump for delivering a liquid or pasty medium which is enclosed in an elastic hose (1) mounted in a working space (5), wherein the working space (5) is bounded on one side by a movable cover (6), and wherein the hose is deformed by movable rollers (2), wherein the rollers, with their drive (3), are separated from the working space (5) by a diaphragm (4), characterized in that
    a plurality of sensors monitor the function of the pump, wherein the sensors are arranged outside the working space, behind the diaphragm, wherein the signals from the sensors are processed by a common electric controller or by a group of controllers that are connected electrically and in terms of signal technology, and wherein the group of sensors contains an electromechanical first position sensor (12) that monitors the position of a force-actuated first plunger (13) that senses the presence, the position and the working position of a hose clamp (14), and/or the group of sensors contains one or more electromechanical second position sensors (15, 17) that monitor the position of one or more force-actuated second plungers (16, 18) that sense the hose (1) on the suction side of the rollers (2) or on the pressure side of the rollers (2).
  2. Pump according to Claim 1, characterized in that the electric controller and the sensors are arranged on a common board.
  3. Pump according to Claim 1 or 2, characterized in that the group of sensors contains a capacitive sensor (11) for detecting air bubbles.
  4. Pump according to one of Claims 1 to 3, characterized in that the group of sensors contains an electromechanical position sensor (19) that monitors the position of a displaceable carrier (21) acted on by a compression spring (26), wherein the carrier supports a roller head (22) and the roller head guides the rollers (2).
  5. Pump according to Claim 1, characterized in that the first plunger (13) opens the hose clamp (14) when the movable cover (6) is closed, wherein a face (23) on the cover pushes the hose clamp against the plunger.
  6. Pump according to one of Claims 1 to 5, characterized in that the first position sensor (12) checks or takes on the function of the second position sensor (15) in that a closing spring (24) of the hose clamp (14) adopts a force equilibrium with a compression spring (25) of the first plunger (13) and with the elastic hose (1) in the closed state of the cover (6), specifically with the first plunger (13) in a position which is not determined by a mechanical stop.
  7. Pump according to one of Claims 1 to 6, characterized in that the third position sensor (19) checks or takes on the function of the second position sensor (17) and/or of the first position sensor (12) in that the compression spring (26) acting on the carrier (21) adopts a force equilibrium with the elastic hose during operation of the pump, specifically with the carrier (21) in a position which is not determined by a mechanical stop.
  8. Pump according to one of Claims 1 to 7, characterized in that, in the electric controller, the signals from the second position sensors (15, 17) and from the third position sensor (19) are processed together, in order to obtain information about pump faults with greater reliability and also to detect the failure of one of the sensors, wherein the electric controller contains mathematical functions or tables determined in the development phase of the pump, which describe the setpoint states of the sensors depending on the density and the viscosity of the medium being delivered.
EP14003758.1A 2013-12-09 2014-11-08 Dosing pump for conveying pasty media with high demands on hygiene and operational reliability Active EP2886859B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310020560 DE102013020560B3 (en) 2013-12-09 2013-12-09 Dosing pump for conveying pasty media with high hygiene and operational safety requirements

Publications (3)

Publication Number Publication Date
EP2886859A2 EP2886859A2 (en) 2015-06-24
EP2886859A3 EP2886859A3 (en) 2016-03-09
EP2886859B1 true EP2886859B1 (en) 2019-04-17

Family

ID=51900688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14003758.1A Active EP2886859B1 (en) 2013-12-09 2014-11-08 Dosing pump for conveying pasty media with high demands on hygiene and operational reliability

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DE (1) DE102013020560B3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015005286A1 (en) 2015-04-25 2016-10-27 Thomas Magnete Gmbh Device for conveying and dosing with a signaling device
DE102015011423A1 (en) 2015-09-01 2017-03-02 Thomas Magnete Gmbh Hose pressure sensor and method for operating the hose pressure sensor
DE102016009596B4 (en) 2016-08-06 2018-05-30 Thomas Magnete Gmbh Pump unit with pressure sensors and method for operating the pump set
CN109826779B (en) * 2019-03-19 2020-05-12 中机国能炼化工程有限公司 High-safety conveying process for corrosive liquid
CN109826780B (en) * 2019-03-19 2020-05-08 安徽龙泉泵阀制造有限公司 Pressure pump for extracting corrosive liquid based on immersion wave pushing

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DE741972C (en) * 1942-01-29 1944-11-17 Roger Reymond Peristaltic pumps for medical purposes
US3591319A (en) * 1969-03-17 1971-07-06 Scientific Industries Flow conduit protective member for peristaltic pump
DE2855634A1 (en) * 1978-12-22 1980-06-26 Ara Werk Kraemer Gmbh & Co METHOD AND DEVICE FOR PUMPING, IN PARTICULAR DOSING, FROM PASTOISES TO LIQUID MEASURES BY MEANS OF A HOSE PUMP
GB2285837B (en) * 1994-01-24 1998-05-13 Varian Australia Peristaltic pump
DE19745999A1 (en) * 1997-10-20 1999-04-22 Horst Jungkeit Modular miniature hose pump for delivering liquid media
EP1317626B1 (en) * 2000-09-14 2006-08-02 Jan W. Beenker Method and device for conveying media
US8852148B2 (en) * 2005-11-01 2014-10-07 Curlin Medical Inc. Infusion pump having function keys
US8052399B2 (en) * 2007-10-18 2011-11-08 Cole-Parmer Instrument Company Peristaltic pump
WO2010053831A1 (en) * 2008-11-10 2010-05-14 Delphi Technologies, Inc. Infusion pump assembly having a reverse rotation prevention system and method for operating the same

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Also Published As

Publication number Publication date
DE102013020560B3 (en) 2015-04-16
EP2886859A3 (en) 2016-03-09
EP2886859A2 (en) 2015-06-24

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