EP0172795A2 - Pompe à fluide - Google Patents

Pompe à fluide Download PDF

Info

Publication number
EP0172795A2
EP0172795A2 EP85850233A EP85850233A EP0172795A2 EP 0172795 A2 EP0172795 A2 EP 0172795A2 EP 85850233 A EP85850233 A EP 85850233A EP 85850233 A EP85850233 A EP 85850233A EP 0172795 A2 EP0172795 A2 EP 0172795A2
Authority
EP
European Patent Office
Prior art keywords
pump
tubular member
fluid
tube
housing
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Withdrawn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
EP85850233A
Other languages
German (de)
English (en)
Other versions
EP0172795A3 (fr
Inventor
Ulf Jöran Lagne
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.)
Institut Cerac SA
Original Assignee
Institut Cerac SA
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 Institut Cerac SA filed Critical Institut Cerac SA
Publication of EP0172795A2 publication Critical patent/EP0172795A2/fr
Publication of EP0172795A3 publication Critical patent/EP0172795A3/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Withdrawn legal-status Critical Current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
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
    • F04B47/024—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level actuated by muscle power
    • 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
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/10—Pumps having fluid drive

Definitions

  • the present invention relates to a fluid pump which advantageously can be used for pumping a variety of fluids.
  • Simple and cheap prior art pumps comprise a cylinder in which a piston is movable to accomplish the pumping.
  • Such pumps have the drawback of requiring a high quality intemal surface in the cylinder.
  • a seal is needed between the piston and the cylinder.
  • Such a seal causes friction and wear. Regular maintenance is therefore required.
  • To move the piston in the cylinder a rod, capable of taking loads in both directions, is needed. This is a substantial drawback if the pump is to be used in a deep well.
  • the drawback with the piston and cylinder arrangement becomes even more evident if a fluid containing abrasive material, e.g. cement, is to be pumped.
  • the present invention aims at doing away with the above mentioned drawbacks by replacing the piston with a tubular pump element of an elastic material having helically extending threads embedded.
  • the elastic material could advantageously be rubber.
  • the reinforcing threads should be resistant against deformation and be positioned with a separation that gives a good elasticity to the tubular pump element.
  • fig 1 shows a section through a fluid pump according to the invention.
  • Fig 2 shows a part section through a pump element used in the invention.
  • Fig 3 shows a modified embodiment of the invention.
  • the fluid pressure pump shown in the drawings comprises a housing 11 covered by a cover 12.
  • An inlet valve 16 is arranged in a channel 14, 1 5 in the bottom of the housing.
  • the valve element is mounted by means of a screw 13. Fluid to be pumped is entered into pump chamber 20 through the inlet valve and is then delivered through outlet valve 18 to a conduit 19 which leads to a delivery point.
  • Valve element 18 is arranged in channel 17 in the cover 1 2 and held in place by conduit 19 which is screwed into cover 12.
  • a pump element comprising a tubular member 21 and end pieces 22,23 is mounted in pump chamber 20. End piece 23 is fixed, e.g. by a wire 24, to cover 12.
  • End piece 22 is elastically connected to housing 11 by means of an adjustable spring 25.
  • the interior of the tubular member 21 is by means of a conduit 26 connected to a fluid pressure source 32, which is made in the same way as the pump element 21.
  • the fluid pressure source 32 is connected to a stand 31 having a lever 34 which in a suitable way, e.g. by means of a wire 33, makes it possible to change the length of the fluid pressure source. This results in a change in the fluid pressure, as described below.
  • This change in pressure results in a change of volume of the pump element 21. This change in volume, caused by moving lever 3 4 up and down, accomplishes the pumping.
  • the tubular member 21, the same is valid for tubular member 32, comprises a tube 41 in which reinforcing threads 42 are embedded. Threads 42 extend helically along the tube at a pitch angle v. The threads extend in both directions. If the angle v is greater than anxot(sqrt(2)), approx. 3 5 .3° a decrease in the length of the tubular member caused by pressurization of the interior of the tubular member results in an increase of the volume of the tubular member. If on the other hand angle v is smaller than the above mentioned value a decrease in length results in a decrease in volume.
  • Adjustment of the force of spring 25 changes the pressure needed from fluid pressure source 32 to accomplish pumping. In this way it is possible to adjust the pump for pumping with different counterpressures in conduit 19.
  • Tube 41 has been extended to be clamped to housing 11 and cover 12 by means of clamps 51 and 52 respectively.
  • the length of the tube 41 has been chosen such that a predetermined tensile force prevails in the tube. In this way the tube replaces the spring 25 of fig 1 .
  • the pump will then be adapted to a particular counterpressure. In order to be adapted to another counterpressure the length of the tube of that pump has to be changed.
  • Tube 41 is provided with a dividing piece 53 clamped to the tube by means of a clamp 54.
  • Channel 15 communicates with pump chamber 20 via channel 55, groove 56 and hole 57 through tube 41 and clamp 54.
  • the space above dividing piece 53 is via conduit 26 connected to a fluid pressure source of variable pressure which effects the pumping.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP85850233A 1984-08-01 1985-07-10 Pompe à fluide Withdrawn EP0172795A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3712/84 1984-08-01
CH371284A CH657668A5 (fr) 1984-08-01 1984-08-01 Pompe a fluide.

Publications (2)

Publication Number Publication Date
EP0172795A2 true EP0172795A2 (fr) 1986-02-26
EP0172795A3 EP0172795A3 (fr) 1987-01-14

Family

ID=4261889

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85850233A Withdrawn EP0172795A3 (fr) 1984-08-01 1985-07-10 Pompe à fluide

Country Status (3)

Country Link
EP (1) EP0172795A3 (fr)
JP (1) JPS61106986A (fr)
CH (1) CH657668A5 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4822257A (en) * 1986-01-16 1989-04-18 Olofsson Bjoern Pump arrangement, particularly for pumping water from deep wells
US5067390A (en) * 1989-07-11 1991-11-26 Bridgestone Corporation Double-acting flexible wall actuator
GB2304828A (en) * 1995-09-07 1997-03-26 Stanwell Technic Ltd Drinks dispensing apparatus
DE10142107C1 (de) * 2001-08-30 2003-05-15 Gruender & Hoetten Gmbh Fluidpumpe
DE102004049528A1 (de) * 2004-10-09 2006-04-13 Stitz GmbH Meßgeräte und Apparate Druckmittelbetriebene Pumpe zum Fördern von Flüssigkeiten

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335666A (en) * 1966-01-05 1967-08-15 Laval Turbine Pulsator pumps
DE1911525A1 (de) * 1968-03-08 1969-10-02 Stefani Roberto De Pumpsystem mit ausserhalb eines gebohrten Brunnens angebrachter Pumpe
GB1497712A (en) * 1975-01-06 1978-01-12 Vergnet M Pumps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335666A (en) * 1966-01-05 1967-08-15 Laval Turbine Pulsator pumps
DE1911525A1 (de) * 1968-03-08 1969-10-02 Stefani Roberto De Pumpsystem mit ausserhalb eines gebohrten Brunnens angebrachter Pumpe
GB1497712A (en) * 1975-01-06 1978-01-12 Vergnet M Pumps

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4822257A (en) * 1986-01-16 1989-04-18 Olofsson Bjoern Pump arrangement, particularly for pumping water from deep wells
US5067390A (en) * 1989-07-11 1991-11-26 Bridgestone Corporation Double-acting flexible wall actuator
GB2304828A (en) * 1995-09-07 1997-03-26 Stanwell Technic Ltd Drinks dispensing apparatus
GB2304828B (en) * 1995-09-07 1998-12-23 Stanwell Technic Ltd Drinks dispensing apparatus
DE10142107C1 (de) * 2001-08-30 2003-05-15 Gruender & Hoetten Gmbh Fluidpumpe
DE102004049528A1 (de) * 2004-10-09 2006-04-13 Stitz GmbH Meßgeräte und Apparate Druckmittelbetriebene Pumpe zum Fördern von Flüssigkeiten

Also Published As

Publication number Publication date
EP0172795A3 (fr) 1987-01-14
JPS61106986A (ja) 1986-05-24
CH657668A5 (fr) 1986-09-15

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Effective date: 19881114

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Inventor name: LAGNE, ULF JOERAN