WO1986003255A1 - Pompe - Google Patents

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Publication number
WO1986003255A1
WO1986003255A1 PCT/SE1985/000473 SE8500473W WO8603255A1 WO 1986003255 A1 WO1986003255 A1 WO 1986003255A1 SE 8500473 W SE8500473 W SE 8500473W WO 8603255 A1 WO8603255 A1 WO 8603255A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
elevations
displacing means
pumping element
flexible
Prior art date
Application number
PCT/SE1985/000473
Other languages
English (en)
Inventor
Eric Bruce
Original Assignee
Eric Bruce
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 Eric Bruce filed Critical Eric Bruce
Priority to AT85906096T priority Critical patent/ATE40187T1/de
Priority to DE8585906096T priority patent/DE3567702D1/de
Publication of WO1986003255A1 publication Critical patent/WO1986003255A1/fr

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
    • 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
    • F04B43/1238—Machines, pumps, or pumping installations having flexible working members having peristaltic action using only one roller as the squeezing element, the roller moving on an arc of a circle during squeezing
    • 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
    • F04B43/123—Machines, pumps, or pumping installations having flexible working members having peristaltic action using an excenter as the squeezing element

Definitions

  • the invention relates to a peristaltic pump, i e a displacement pump comprising a pump housing enclosing a space delimited by side walls and a mantis wall; a pumping element influenced by peristaltic displacements and arranged in said space with an inlet at one end and an outlet at the other and with the outer periphery of said element contacting the mantle wall of said space at least along a sector thereof, at least the inwardly facing part of that sector of said element which maintains said contact consisting of a flexible material which permits said element to be compressed under the influence of a force directed radially outwards against the inside of said element; an annular displacing means in said space inside said flexible pumping element, the circumference of said displacing means being smaller than that of the curve along which it rolls; and means of propulsion to impart on said annular displacing means a rolling movement in said space, said " displacing means concur ⁇ rently being pressed against the flexible inside of said
  • the invention also relates to pumping systems where the peri ⁇ staltic pu ⁇ ip is used to pump a working medium, which drives one or several further displacement pumps, also being parts of said system.
  • This concept also includes improvements of the second displacement pump, said improvements by themselves being usable in other contexts than in combination with the peristaltic dis ⁇ placement pump.
  • Peristaltic pumps are known in a large number of embodiments.
  • the Swiss Patent No 482 922 and the British Patent No 1 539 823 constitute examples of known designs.
  • These and other peristal- tic pump designs have in common that the flexible pumping ele ⁇ ment are being worked upon in a manner causing strong wear by that element which for each turn is pressed against the inside of the pumping element along the entire length thereof within the section in question.
  • the displacement is accomplished by a combination of pressure, directed radially outwards, nd rolling, but includes also a non-negligible amount of sliding against the flexible pumping element. All these factors contribute to the intense wear on the flexible pumping element, which is normally a piece of tubing, thus considerably shortening the working life of the flexible pumping element.
  • the pumping element which makes it difficult for solid parti ⁇ cles of the pumped medium to be displaced from the compression zone, instead being trapped therein and being pressed into the tubing material, thereby causing heavy wear on the material.
  • pumps of the kind comprising a first chamber provided with check valves at the inlet and outlet permitting the pumped medium to flow through the first chamber, a second chamber, a flexible impermeable wall separating the first chamber from the second, and at least one fitting at the second chamber through which to admit and discharge a working medium during working and return strokes, respectively,thus making said flexible wall during the working stroke to expand into the first chamber there to displace a corresponding amount of the pumped medium which is discharged through the outlet valve, and during the return stroke to make the flexible wall withdraw, thus sucking in a corresponding amount of pumped medium through the inlet valve into the first chamber, the least volume of the first chamber being set by a perforated rigid wall inside the flexible wall.
  • a first object of the invention is to provide a peristaltic pump the flexible pumping element of which does not suffer the same degree of wear that conventional comparable pumps do, and therefore has a considerably longer working life.
  • Another object of the invention is to provide a pumping system comprising both a pump for a working medium in which is gene ⁇ rated a pulsating fluid pressure by said pump and a number of displacement pumps.
  • a third object of the invention is to provide an improved dis ⁇ placement pump of a non-peristaltic type, which is well suited to function jointly with preferably one or several peristaltic pumps.
  • a peristaltic pump is characterized in that the annular displacing means is provided with out ⁇ wardly directed elevations in the form of ridges or suchlike, spaced along the periphery of the annular displacing means, the distance between adjacent elevations being several times the arc length of each individual elevation, said elevations being intended to be pressed against the flexible pumping element so that said element is locally collapsed in the area of the said elevations, and that the relation between the circumference of the annular displacing means and that of the curve along which it rolls is such that the said elevations are displaced for a certain distance per turn, the point of engagement against the flexible pumping element thus being the same only after a number of turns, which distributes the wear caused by the elevations on the flexible pumping element over a larger area and reduces attrition, this in turn increasing the working life of the pumping element.
  • Typical of an application of this peristaltic pump is that the pump is being used as a working pump to create a pulsating fluid pressure in a second displacement pump of the kind also descri ⁇ bed above.
  • a characteristic of an improvement of this second displacement pump is that the flexible wall of this pump is pre-tensioned.
  • Fig. 1 is a schematic cross-sectional view of the peristaltic pump, the sectional plane being perpendicular to the pump axis;
  • Fig. 2 is a section taken along the line II-II of Fig. 1;
  • Fig. 3 is a schematic cross-section in the axial plane of a second displacement pump, suited for use in conjunction with the peristaltic pump;
  • Figs. 3a and 3b illustrate elements of the pump of Fig. 4;
  • Fig. 4 is, a schematic view of a pumping system comprising both a peristaltic pump and a second displacement pump;
  • Fig. 5 is a schematic view of a developed form of the peri ⁇ staltic pump in accordance with the invention and its use for serving four serially connected displacement pumps for the pumping of water or some other pumping medium from large depths. DESCRIPTION OF PREFERRED EMBODIMENTS
  • a pump housing is generally indicated by reference numeral 1.
  • This housing is in the shape of a box, with side walls 2 on each side of a pump housing body 3, said body having a cylindrical bore 4, forming a pumping space with a cylindrical mantle wall 5.
  • Two bores 6 and 7 extend through the body 3 from the outside, tangentially into the space 4.
  • a flexible pumping element in the form of a tube 8 extends through the bores 6 and 7 and arcuately through the space 4, in which space said tube runs adjacent the mantle wall 5 for half the circumference thereof.
  • the space 4 also holds a displacing means in the form of a planetary ring 9.
  • the diameter of this ring is considerably less than that of the mantle wall 5 and also less than that of the inside 10 facing the interior of the space 4 of that part of the tube 8 which runs adjacent the mantle wall 5.
  • the planetary ring 9 is arranged to be rolled around the pumping space 4 by means of a central pumping axle 11.
  • the axle 11 drives a roller 12, which is pressed against the inside of the planetary ring 9 in a manner well known in the art.
  • the planetary ring 9 is provided with distinct, large elevations 13, the pitch, form, profile, and height of these elevations being such that they, as the planetary ring rotates, accomplish a suitable local com ⁇ pression of the tube 8 in the area where said tube runs adjacent the mantle,wall 5.
  • the elevations 13 may be attached to the planetary ring 9 in a stationary manner or flexibly or elsewise and may also, by a suitable choice of material,be made to inter ⁇ act with the tubing material so as to achieve the least possible 47
  • the pitch and the pressure are set so that there is never less than one elevation and never more than two elevations in full engagement with the tube at any one time, i e collapsing it fully and preventing the return flow of the pumped medium.
  • the planetary ring 9 rotates, the com ⁇ pression in the regions of the elevations 13 will be directed radially, and at the area of contact only a slight turning will occur, the tangential forces at the same time being very small, which in turn reduces wear and resistance to rolling.
  • the relation of the circumference of the planetary ring 9 to that of the curve along which it rolls inside the pumping space 4 is such that the elevations 13 will be displaced slightly for each turn, the points of interaction of the elevations with the tube 8 being the same only after a number of turns.
  • the wear of the elevations against the tubing is distributed over a larger area, which diminishes total wear and increases the working life of the tube.
  • the lessened wear allows for a larger pump capacity as the rate of revolution may be increased and the pump size may be decreased.
  • the peristaltic pump described may function as a normal pump for transportation, such as a suction pump.
  • the suction side 14 is connected to the volume of fluid which is to be transported, and the discharge side 15 is connected to a transport conduit.
  • the pump may also be used as a source of pulsations for a second displacement pump, providing a pulsating flow of a working medium for said second pump.
  • the suction side 14 is closed at one end, schematically indicated by the plug 16.
  • a vacuum is created in the tube section 8 1 on the suction side 14, said vacuum being filled as the planetary ring 9 is at the top side of the pumping space 4.
  • the peristaltic pump may serve for example a displacement pump 17 of the kind illustrated schematically in Fig. 3.
  • the pump 17 comprises an outer chamber 18 with rigid walls 19, the material of the walls being for example sheet metal or plastic.
  • the outer chamber 18 is provided with a feed conduit 20 and a discharge conduit 21 with checkvalves 22 and 23, respectively.
  • an inner chamber 24 formed by a rigid cylindrical body with a perforated mantle and closed ends.
  • a connecting conduit to the inner chamber 24 is indicated by numeral 25.
  • This connecting conduit 25 is connected to the pressure side 15 of the above described peristaltic pump.
  • Fig. 3a On the outside of the rigid, perforated body 26, Fig. 3a, one or several rubber sleeves 27 have been pushed. As is evident from the figures, the sleeves 27 must be expanded considerably. to fit the perforated body 26. Thus, they are pre-tensioned as they assume their starting position outside the body 26.
  • Fig. 4 illustrates the use of a peristaltic pump 1' to serve a second displacement pump 17 of the type just described.
  • the pressure side 15 of the pump 1* is connected to the inner chamber 24 of the pump 17.
  • the working stroke of the peristaltic pump 1* the working medium is pumped into the inner chamber 24 * of the pump 17, where it expands the flexible sleeve 27 further and displaces working medium out of the outer chamber 18 through the discharge conduit 21 via check valve 23.
  • the flexible sleeve 27 springs back against the perforated body 26 and con- currently, working medium is again sucked into the suction side
  • the return force of the sleeve 27 may be set by the choice of material thickness or initial diameter so as to achieve the proper pre-tensioning according to the conditions at hand, or by applying several sleeves 27, one outside the other, as is symbolically indicated in Fig. 3b, where three sleeves 27 are shown, intended to be put outside each other outside the perforated body 26.
  • the displacement pump 17 may for example be put to use in a drill hole to pump water, while the peristaltic pump 1 or l 1 is placed adjacent the hole or at a distance therefrom.
  • the pump may be driven manually, by a motor, by wind, or elsewise.
  • working medium is supplied from the pump 1 to the inner chamber of the pump 17, so that the elastic sleeve on the outside of the perforated body 26 expands, water is pressed in bursts via the discharge opening-21 out of the drill hole.
  • the iterated application of working medium to the pump 17 causes a pulsating movement and a pulsating discharge of water out of the drill hole.
  • a drill hole 30 in which there are arranged four serially connected displacement pumps 17 at different depths. Each one of these may be served by a peri- staltic pump of the kind described with reference to Figs. 1, 2, and 4, said peristaltic pumps then being arranged to function with a suitable phase displacement in relation to each other. It is also possible to use a peristaltic pump of the kind illustrated in Fig. 5.
  • This pump comprises four tubular elements 32 spaced along the mantle of the pumping space 4. Each tube 32 - 10

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Une pompe péristaltique est pourvue d'un organe annulaire de déplacement (9) dans l'espace de pompage à l'intérieur d'un élément souple de pompage (8), et d'organes de propulsion (11, 12) pour imprimer à l'organe de déplacement un mouvement de roulement dans l'espace de pompage tandis que ledit organe de déplacement est simultanément comprimé contre l'intérieur de l'élément souple de pompage, des parties consécutives de l'élément de pompage étant ainsi comprimées de manière péristaltique. Selon l'invention, ledit organe annulaire de déplacement (9) est muni de protubérances (13) dirigées vers l'extérieur sous forme de crêtes ou similaire et espacées à la périphérie de l'organe de déplacement, la distance entre des protubérances adjacentes étant égale à plusieurs fois la longueur d'arc de protubérances individuelles, l'élément de pompage étant ainsi comprimé localement dans la région des protubérances. D'autre part, le rapport de la circonférence de l'organe de déplacement à celle de la courbe au long de laquelle il roule est tel que les protubérances sont déplacées d'une certaine distance à chaque tour, les points de contact étant identiques à une certaine fréquence.
PCT/SE1985/000473 1984-11-21 1985-11-20 Pompe WO1986003255A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT85906096T ATE40187T1 (de) 1984-11-21 1985-11-20 Pumpe.
DE8585906096T DE3567702D1 (en) 1984-11-21 1985-11-20 Pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8405849A SE8405849D0 (sv) 1984-11-21 1984-11-21 Anordning vid en for manuell drift anpassad pumpanleggning
SE8405849-4 1984-11-21

Publications (1)

Publication Number Publication Date
WO1986003255A1 true WO1986003255A1 (fr) 1986-06-05

Family

ID=20357836

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1985/000473 WO1986003255A1 (fr) 1984-11-21 1985-11-20 Pompe

Country Status (5)

Country Link
EP (1) EP0231194B1 (fr)
AU (1) AU5194286A (fr)
DE (1) DE3567702D1 (fr)
SE (1) SE8405849D0 (fr)
WO (1) WO1986003255A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992009805A1 (fr) * 1990-11-30 1992-06-11 Mathias Reichmuth Pompe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE357801B (fr) * 1971-10-22 1973-07-09 Allen Longford & Ass Ltd
FR2439313A1 (fr) * 1978-10-20 1980-05-16 Pompes Essa Mico Dispositif de pompage pour puits profonds

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE357801B (fr) * 1971-10-22 1973-07-09 Allen Longford & Ass Ltd
FR2439313A1 (fr) * 1978-10-20 1980-05-16 Pompes Essa Mico Dispositif de pompage pour puits profonds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992009805A1 (fr) * 1990-11-30 1992-06-11 Mathias Reichmuth Pompe

Also Published As

Publication number Publication date
SE8405849D0 (sv) 1984-11-21
AU5194286A (en) 1986-06-18
DE3567702D1 (en) 1989-02-23
EP0231194A1 (fr) 1987-08-12
EP0231194B1 (fr) 1989-01-18

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