EP0066522B2 - Membranpumpe mit hydraulischem Antrieb - Google Patents

Membranpumpe mit hydraulischem Antrieb Download PDF

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Publication number
EP0066522B2
EP0066522B2 EP82401008A EP82401008A EP0066522B2 EP 0066522 B2 EP0066522 B2 EP 0066522B2 EP 82401008 A EP82401008 A EP 82401008A EP 82401008 A EP82401008 A EP 82401008A EP 0066522 B2 EP0066522 B2 EP 0066522B2
Authority
EP
European Patent Office
Prior art keywords
diaphragm
pump
elements
beads
membrane
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.)
Expired - Lifetime
Application number
EP82401008A
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English (en)
French (fr)
Other versions
EP0066522B1 (de
EP0066522A1 (de
Inventor
Max-Albert Malizard
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.)
Dosapro Milton Roy SA
Original Assignee
Dosapro Milton Roy 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
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Application filed by Dosapro Milton Roy SA filed Critical Dosapro Milton Roy SA
Priority to AT82401008T priority Critical patent/ATE10964T1/de
Publication of EP0066522A1 publication Critical patent/EP0066522A1/de
Application granted granted Critical
Publication of EP0066522B1 publication Critical patent/EP0066522B1/de
Publication of EP0066522B2 publication Critical patent/EP0066522B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

  • the present invention intends to remedy these drawbacks by proposing a pump which, by its membrane and the mounting thereof, has the qualities necessary for the removal of the above uncertainties and hazards.
  • French patent No. 581223 discloses a rubber membrane for a pump, the two faces of which are in contact with two different fluids, this membrane forming a substantially spherical cup which has a substantially planar outer annular edge.
  • a membrane for a vacuum pump is also known, which is made up of two layers, one made of rubber and the other of a tetrafluoroethylene.
  • membranes are also used, for example in mechanically actuated pumps, which have peripheral fixing beads and a layer of tetrafluoroethylene.
  • the subject of the invention is a hydraulically controlled diaphragm pump comprising at least one diaphragm, the two faces of which are in contact with two different fluids, this diaphragm forming a substantially spherical cup which comprises a substantially planar outer annular edge, the body of pump comprising at least two elements between which the membrane is tightened, in which pump said membrane is constituted by two layers, one in rubber and the other in plastic material such as a tetrafluoroethylene, the other aforesaid layer is on the side concave, each of the faces of said edge is provided with a bead for fixing the membrane in the pump body, between the two aforementioned elements, each of said elements is provided with a toric groove for receiving the aforementioned beads, while the approximation elements at the end of tightening is limited to approximately 80% of the total thickness of the membrane at its beads, the tightening being carried out only on the beads.
  • the depth of the interior spherical cup prefferably be of the order of 4 to 6% of the interior diameter of said annular edge.
  • a membrane according to the invention constituted by a spherical cap 1 of diameter D surrounded by an annular rim 2 substantially planar of width E.
  • This cap 1 and this rim 2 are in one piece and consist of a composite material whose thickest layer 3 is made of rubber (natural or synthetic) and whose thinnest layer 4 is formed on the concave side 1 a by a plastic material, in particular by a tetrafluoroethylene.
  • a plastic material in particular by a tetrafluoroethylene.
  • the proportion in thickness of the two components is about 0/5 Rubber and 1/5 for tetrafluoroethylene.
  • the depth of the spherical cap F (or the arrow thereof in the cutting plane) is between 0.04 and 0.06 D.
  • the rim 2 has on each of its faces a bead 2a and 2b consisting substantially of a half-torus whose radius R is of the order of the thickness of the membrane.
  • R radius
  • Fig. 2 schematically illustrates a double diaphragm pump with hydraulic control.
  • the control chamber 5 is associated in a known manner with a piston 6 and with a compensation device 7.
  • a first membrane 8 isolates this chamber from an intermediate chamber 9, itself even isolated by a second membrane 10 from the pumping chamber 11.
  • the membranes 8 and 10 are coupled, as shown in detail in FIG. 2A, by pinching between elements 12a, 12b, 12c of the pump body. These elements are frontally provided with toric grooves 13 to receive the beads 2a, 2b of the membranes.
  • the elements 12a, 12b, 12c as well as the grooves 13 have dimensions such that, on the one hand, the crushing of the beads 2a, 2b does not exceed 20% of the dimension E (see fig. 1) of the membrane at this point and that, on the other hand, the rest of the membrane located between the above elements is not pinched.
  • the membranes are embedded only at the level of the beads which cooperate with the elements 12a to 12c in the manner of O-rings to seal between the chambers 5, and 11.
  • the advantages of the invention lie in the fact that a pump equipped with the above-described membrane has, for equal diameter, a greater capacity.
  • the longevity of the membrane is increased and its operating performance improved.
  • the tightness ensured during assembly is better (similar to that of the O-ring) with a clamping force lower than that usually practiced on conventional pumps.
  • the intermediate volume is much better defined by the membranes according to the invention and can be much better filled.
  • the invention finds an interesting application in the field of hydraulically controlled diaphragm pumps, and in particular metering pumps.

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

Claims (4)

1. Membranpumpe mit hydraulischer Steuerung, umfassend mindestens eine Membran, deren beide Flächen in Kontakt mit zwei verschiedenen Fluiden stehen, welche Membran eine im wesentlichen kugelförmige Schale (1) bildet, die einen im wesentlichen flachen ringförmigen Aussenrand (2) umfasst, wobei der Pumpenkörper mindestens zwei Elemente (12a, 12b) umfasst, zwischen denen die Membran (10) eingeklemmt ist, dadurch gekennzeichnet, dass die Membran durch zwei Schichten, nämlich einer (3) aus Kautschuk und einer anderen (4) aus Plastikmaterial, wie Tetrafluorethylen, gebildet ist, dass sich die andere Schicht (4) auf der konkaven Seite (1a) befindet, dass jede Seite des Randes mit einem Wulst (2a, 2b) zum Fixieren der Membran im Pumpenkörper zwischen den beiden genannten Elementen versehen ist, dass jedes der Elemente (12a, 12b) mit einer ringförmigen Rille (13) zur Aufnahme der Wülste versehen ist und dass die Annäherung der Elemente am Ende des Klemmens auf etwa 80% der Gesamtdicke (E) der Membran in Höhe ihrer Wülste begrenzt ist;"wobei die Klemmung nur an den Wülsten erfolgt.
2. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Tiefe (F) der inneren kugelförmigen Schale im Bereich von 4 bis 6% des Innendurchmessers (D) des ringförmigen Randes liegt.
3. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Wülste (2a, 2b) im wesentlichen halbringförmig sind, mit einem Aussenradius gleich 2,5 mm.
4. Pumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie zwei Membranen (8, 10) umfasst.
EP82401008A 1981-06-02 1982-06-02 Membranpumpe mit hydraulischem Antrieb Expired - Lifetime EP0066522B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82401008T ATE10964T1 (de) 1981-06-02 1982-06-02 Membran fuer eine hydraulisch betriebene membranpumpe und pumpe mit deren anwendung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8110917 1981-06-02
FR8110917A FR2506859B1 (fr) 1981-06-02 1981-06-02 Membrane pour pompe a commande hydraulique et pompe faisant application

Publications (3)

Publication Number Publication Date
EP0066522A1 EP0066522A1 (de) 1982-12-08
EP0066522B1 EP0066522B1 (de) 1984-12-27
EP0066522B2 true EP0066522B2 (de) 1990-01-31

Family

ID=9259112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401008A Expired - Lifetime EP0066522B2 (de) 1981-06-02 1982-06-02 Membranpumpe mit hydraulischem Antrieb

Country Status (4)

Country Link
EP (1) EP0066522B2 (de)
AT (1) ATE10964T1 (de)
DE (1) DE3261687D1 (de)
FR (1) FR2506859B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3714153A1 (de) * 1987-04-28 1988-12-01 Sergej Michajlovic Altuchov Membranmaschineneinheit
DE102006044253B3 (de) * 2006-09-16 2008-03-27 Thomas Magnete Gmbh Membran und Pumpenkopf für eine hydraulisch angetriebene Membranpumpe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR581223A (fr) * 1924-04-19 1924-11-25 Pompe à diaphragme élastique
FR1274473A (fr) * 1960-08-04 1961-10-27 Pompes notamment à piston, ou pompes à membrane
FR1373780A (fr) * 1963-08-19 1964-10-02 Perfectionnements aux pompes à diaphragme
DE1653369A1 (de) * 1966-10-20 1970-08-27 Erich Becker Membran-Pumpe,insbesondere zur Vakuumerzeugung bei aggressiven Medien
US3771907A (en) * 1971-09-13 1973-11-13 Reynolds Products Simplified positive displacement syrup pump assembly for drink machines

Also Published As

Publication number Publication date
ATE10964T1 (de) 1985-01-15
FR2506859A1 (fr) 1982-12-03
FR2506859B1 (fr) 1986-04-11
DE3261687D1 (en) 1985-02-07
EP0066522B1 (de) 1984-12-27
EP0066522A1 (de) 1982-12-08

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