EP0340374A1 - Installation de pompage pour des gradients de basse pression - Google Patents

Installation de pompage pour des gradients de basse pression Download PDF

Info

Publication number
EP0340374A1
EP0340374A1 EP88730105A EP88730105A EP0340374A1 EP 0340374 A1 EP0340374 A1 EP 0340374A1 EP 88730105 A EP88730105 A EP 88730105A EP 88730105 A EP88730105 A EP 88730105A EP 0340374 A1 EP0340374 A1 EP 0340374A1
Authority
EP
European Patent Office
Prior art keywords
piston
intake
pump
displacement piston
low pressure
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Withdrawn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
EP88730105A
Other languages
German (de)
English (en)
Inventor
Herbert Dr. Knauer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP88730105A priority Critical patent/EP0340374A1/fr
Publication of EP0340374A1 publication Critical patent/EP0340374A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • F04B11/0075—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons connected in series
    • F04B11/0083—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons connected in series the pistons having different cross-sections

Definitions

  • the invention relates to a pump device that can be used particularly in liquid chromatography. With such pump devices, a continuous volume flow of the eluent is also required on the suction side for the low-pressure gradient formation.
  • the invention has for its object to find a simple, economical and universally applicable solution that allows interference-free low pressure gradients to be achieved with single-piston pumps.
  • This object is achieved in that an additional displacement piston is moved in front of the suction side of the pump in a cylinder so that a continuous, uniform suction flow is the result.
  • FIG. 1 shows the diagram of the suction volume of a single-piston pump with the pulsating suction phases.
  • 2 shows the continuous intake flow of the single-piston pump according to the invention with an additional displacement piston.
  • the displacement piston is moved directly by a cam disc or gear or lever in synchronism with the drive piston. It can also be mechanically coupled to the working piston.
  • the displacement piston should displace approx. 50% of the working volume of the working piston. This can be achieved in that the displacement piston covers half the path of the working piston or has half the volume of the working piston.
  • a low-pulse suction flow is achieved by a simple mechanical solution, which allows different eluents to be switched into the suction flow by means of solenoid valves or other valves.
  • the composition of the eluents is only dependent on the switching times of the valves and is not influenced by the conveying speed. There is no interference between valve switching times and piston frequency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP88730105A 1988-05-02 1988-05-02 Installation de pompage pour des gradients de basse pression Withdrawn EP0340374A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP88730105A EP0340374A1 (fr) 1988-05-02 1988-05-02 Installation de pompage pour des gradients de basse pression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88730105A EP0340374A1 (fr) 1988-05-02 1988-05-02 Installation de pompage pour des gradients de basse pression

Publications (1)

Publication Number Publication Date
EP0340374A1 true EP0340374A1 (fr) 1989-11-08

Family

ID=8200555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730105A Withdrawn EP0340374A1 (fr) 1988-05-02 1988-05-02 Installation de pompage pour des gradients de basse pression

Country Status (1)

Country Link
EP (1) EP0340374A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4211015A1 (de) * 1992-04-02 1993-10-07 Webasto Thermosysteme Gmbh Zyklisch arbeitende Fluid-Fördervorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811931A (en) * 1954-05-14 1957-11-05 Wilhelm S Everett Timed surge neutralizer
DE2725464A1 (de) * 1977-06-04 1978-12-14 Mueszeripari Muevek Lab Pulsationsfreie zumesspumpe
EP0136220A1 (fr) * 1983-08-31 1985-04-03 Groupe Industriel De Realisation Et D'application Gira S.A. Système de pompage pour chromatographie en phase liquide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811931A (en) * 1954-05-14 1957-11-05 Wilhelm S Everett Timed surge neutralizer
DE2725464A1 (de) * 1977-06-04 1978-12-14 Mueszeripari Muevek Lab Pulsationsfreie zumesspumpe
EP0136220A1 (fr) * 1983-08-31 1985-04-03 Groupe Industriel De Realisation Et D'application Gira S.A. Système de pompage pour chromatographie en phase liquide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4211015A1 (de) * 1992-04-02 1993-10-07 Webasto Thermosysteme Gmbh Zyklisch arbeitende Fluid-Fördervorrichtung

Similar Documents

Publication Publication Date Title
DE3785207T2 (de) Pumpvorrichtung zur abgabe von fluessigkeit bei hohem druck.
DE3874883T2 (de) Fluessigkeitsfoerdernde kolbenpumpe.
EP0409001B1 (fr) Dispositif d'injection de liquides
DE19623537C2 (de) Dosierpumpe und Dosierverfahren für Flüssigkeiten
DE3145873A1 (de) Fluessigkeits-chromatograph
DE3688306T2 (de) Flüssigkeitschromatograph.
DE10329314A1 (de) Flüssigkeitschromatographenpumpe und Steuerverfahren für diese
DE69011265T2 (de) Ausgleichsventil.
EP0226070B1 (fr) Dispositif de pompage pour débiter des quantités prédéterminées d'au moins deux composants
DE2142956B2 (de) Steuereinrichtung für eine Verdrängerpumpe oder Verdrängungsmisskammer
DE3818802A1 (de) Schmiermittelpumpe mit einer einstellbaren dosiervorrichtung
DE3246067A1 (de) Hochdruck-dosierpumpensystem
EP0340374A1 (fr) Installation de pompage pour des gradients de basse pression
DE2617375A1 (de) Vorrichtung zum steuern von schmiereinrichtungen
DE3605935A1 (de) Kompressor mit einem mechanismus zur verringerung von pulsierenden druckschwankungen
DE3605936A1 (de) Kompressor mit einem mechanismus zur verringerung von pulsierenden druckschwankungen
DE2533222C3 (de) Schmierölpumpe mit Fördermengeneinstellung
DE2725464A1 (de) Pulsationsfreie zumesspumpe
EP0007109A1 (fr) Appareil pour le dosage d'une solution d'agents chimiques dans un courant de liquide
DE3837325A1 (de) Fluessigkeits-kolbenpumpe fuer chromatographische analysegeraete
DE3607351A1 (de) Radialkolbenpumpe
DE3116534A1 (de) Kolbenvakuumpumpe
EP0402625B1 (fr) Entraînement pour pompe doseuse pour gaz
DE2038369A1 (de) Zweizylinderpumpe zum annaehernd pulsationsfreien Foerdern von hochviskosen Fluessigkeiten
DE9007487U1 (de) Pumpenanlage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES FR GB IT LI NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19900509