EP1156214A1 - Système de contrôle d'une pompe à membrane - Google Patents

Système de contrôle d'une pompe à membrane Download PDF

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Publication number
EP1156214A1
EP1156214A1 EP01111814A EP01111814A EP1156214A1 EP 1156214 A1 EP1156214 A1 EP 1156214A1 EP 01111814 A EP01111814 A EP 01111814A EP 01111814 A EP01111814 A EP 01111814A EP 1156214 A1 EP1156214 A1 EP 1156214A1
Authority
EP
European Patent Office
Prior art keywords
membrane
conductor loop
shunt
time
bridge
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.)
Withdrawn
Application number
EP01111814A
Other languages
German (de)
English (en)
Inventor
Gerhard Röhner
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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
Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP1156214A1 publication Critical patent/EP1156214A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • F04B43/0009—Special features
    • F04B43/0081—Special features systems, control, safety measures
    • F04B43/009—Special features systems, control, safety measures leakage control; pump systems with two flexible members; between the actuating element and the pumped fluid

Definitions

  • WO 95/06205 proposed an electrically conductive fiber made of polytetrafluoroethylene use. It is embedded in a membrane layer made of the same material and works as a transmitter. The fiber is designed on the membrane that they cover essentially the entire deformation area of the membrane Form a spiral or a double spiral covers. The ends of the fiber are led out at the edge and with an electrical measuring device interconnected. The measuring device determines the ohmic resistance of the Fiber. As soon as the membrane layer shows signs of fatigue or cracks has, they transfer to the fiber. There is a scribing of the Fiber and as a result, the conductivity of the fiber changes what through the measuring device is detected.
  • the invention has for its object a method and a device to create, with the help of pump operating parameters Membrane conveyor unit can be detected.
  • the method is a conductivity attached to a membrane Resistance device at least over a pump period as a time-dependent Size measured and this size used in the acquisition.
  • a The basis for carrying out the method is the Technical problem solved according to the invention in that a Elastomer conductor loop on a membrane of a membrane conveyor unit attached and in a bridge branch of a Wheatston bridge and / or in Series is switched with a shunt and a change in Operating state of the membrane a temporal change in the measuring voltage in the Bridge branch or at the shunt.
  • the invention is based on the idea of a resistive transmitter to arrange a membrane so that the current operating state of the Membrane can be measured by the conductance over time can.
  • the measurement signal obtained in this way then gives the current one at Membrane actually prevailing operating condition again.
  • Resistive device in a characteristic manner over each pump cycle.
  • the resistance device is stretched. By this stretch undergoes a change in length with simultaneous Reduction in cross-section.
  • This geometric change in Resistance device is the electrical resistance of the transmitter proportional, i.e. H. the resistance increases with stretching.
  • a transmitter can be produced that has similar mechanical properties to the rubber-elastic membrane plate itself.
  • the sensor does not have a disturbing effect when the rubber-elastic membrane plate moves.
  • the transmitter can be designed so that its tensile strength is between 8 and 25 N / mm 2 and its elongation at break is between 50 and 400% and the specific resistance is less than 300 ohm / cm.
  • the electrical resistance of the elastomer conductor loop is low. In this resistance range, a change in conductivity is easy to measure.
  • a very simple measurement arrangement can be obtained by using the Surface conductor loop in series with a voltage source and a shunt switches and wins the time-dependent variable by using the Voltage drop across the shunt measures.
  • the time-dependent variable is a mixed variable periodic course.
  • the measured variable consists of a constant component AC component is superimposed.
  • the pumping frequency can be done easily can be determined by using the alternating component of the measurement signal, for example by means of a bistable flip-flop that determines the pump frequency.
  • Damage monitoring of the membrane can be done in a simple manner done by averaging the time-dependent quantity performs. A comparison can be made with a predetermined threshold value Membrane breakage can be signaled.
  • FIG 2 is a partial sectional view of a mechanically operated membrane shown.
  • the rubber-elastic membrane plate 6 is through a metal flange 7 periodically deflected. It denotes OT a top dead center, UT one bottom dead center and N the neutral position of the membrane.
  • As the Sectional view shows the resistance device 1 with the rubber-elastic membrane attached.
  • a protective layer 8 protects the membrane and resistance device 1 to the conveying fluid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
EP01111814A 2000-05-18 2001-05-16 Système de contrôle d'une pompe à membrane Withdrawn EP1156214A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10024116 2000-05-18
DE10024116 2000-05-18

Publications (1)

Publication Number Publication Date
EP1156214A1 true EP1156214A1 (fr) 2001-11-21

Family

ID=7642357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01111814A Withdrawn EP1156214A1 (fr) 2000-05-18 2001-05-16 Système de contrôle d'une pompe à membrane

Country Status (3)

Country Link
US (1) US6568912B2 (fr)
EP (1) EP1156214A1 (fr)
WO (1) WO2001088376A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006011346A1 (de) * 2006-03-11 2007-09-13 Fresenius Medical Care Deutschland Gmbh Verfahren und Vorrichtung zum Betreiben einer elektrischen peristaltischen Schlauchpumpe
WO2017140418A1 (fr) * 2016-02-17 2017-08-24 Timmer Gmbh Pompe à membrane, membrane pour une pompe à membrane et procédé de détection d'une membrane défectueuse d'une pompe à membrane

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10323059A1 (de) * 2003-05-20 2004-12-09 Prominent Dosiertechnik Gmbh Sensormembran
DE102009021238A1 (de) * 2009-05-14 2010-11-18 Siemens Aktiengesellschaft Verfahren zur Identifizierung von Verschmutzung und /oder Betauung von Bauelementen eines Spannungszwischenkreis-Umrichters
CN104155870B (zh) * 2014-08-30 2016-08-31 重庆长安汽车股份有限公司 一种挥鞭伤试验假人头部与头枕接触时间测量装置
DE102022119086A1 (de) * 2022-07-29 2024-02-01 Gemü Gebr. Müller Apparatebau Gmbh & Co. Kommanditgesellschaft Vorrichtung für eine Armatur der Prozessfluidtechnik

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991017701A1 (fr) * 1990-05-11 1991-11-28 Medex, Inc. Transducteur de pression tubulaire
WO1995006205A1 (fr) 1993-08-23 1995-03-02 W.L. Gore & Associates, Inc. Membrane de pompe a pre-signalisation des defaillances
DE4336823A1 (de) * 1993-10-28 1995-05-04 Ulf Dr Ing Brunke Vorrichtung zur elektronischen Membranlagenkontrolle
FR2736689A1 (fr) * 1995-07-11 1997-01-17 Sames Sa Procedes de mesure de debit ou de commande d'une pompe, pompe et installation de projection de produit de revetement comprenant une telle pompe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610256A (en) * 1984-09-25 1986-09-09 Utah Medical Products, Inc. Pressure transducer
US4781535A (en) * 1987-11-13 1988-11-01 Pulsafeeder, Inc. Apparatus and method for sensing diaphragm failures in reciprocating pumps
US5560279A (en) * 1995-03-16 1996-10-01 W. L. Gore & Associates, Inc. Pre-failure sensing diaphragm
US6279402B1 (en) * 1998-08-10 2001-08-28 Applied Materials, Inc. Device for measuring pressure in a chamber

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991017701A1 (fr) * 1990-05-11 1991-11-28 Medex, Inc. Transducteur de pression tubulaire
WO1995006205A1 (fr) 1993-08-23 1995-03-02 W.L. Gore & Associates, Inc. Membrane de pompe a pre-signalisation des defaillances
DE4336823A1 (de) * 1993-10-28 1995-05-04 Ulf Dr Ing Brunke Vorrichtung zur elektronischen Membranlagenkontrolle
FR2736689A1 (fr) * 1995-07-11 1997-01-17 Sames Sa Procedes de mesure de debit ou de commande d'une pompe, pompe et installation de projection de produit de revetement comprenant une telle pompe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006011346A1 (de) * 2006-03-11 2007-09-13 Fresenius Medical Care Deutschland Gmbh Verfahren und Vorrichtung zum Betreiben einer elektrischen peristaltischen Schlauchpumpe
US8043076B2 (en) 2006-03-11 2011-10-25 Fresenius Medical Care Deutschland Gmbh Method and device for operating an electric peristaltic hose pump
WO2017140418A1 (fr) * 2016-02-17 2017-08-24 Timmer Gmbh Pompe à membrane, membrane pour une pompe à membrane et procédé de détection d'une membrane défectueuse d'une pompe à membrane

Also Published As

Publication number Publication date
US20020006335A1 (en) 2002-01-17
WO2001088376A1 (fr) 2001-11-22
US6568912B2 (en) 2003-05-27

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