EP2921705B1 - Membranplattengruppe für Membranpumpen - Google Patents

Membranplattengruppe für Membranpumpen Download PDF

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Publication number
EP2921705B1
EP2921705B1 EP14179637.5A EP14179637A EP2921705B1 EP 2921705 B1 EP2921705 B1 EP 2921705B1 EP 14179637 A EP14179637 A EP 14179637A EP 2921705 B1 EP2921705 B1 EP 2921705B1
Authority
EP
European Patent Office
Prior art keywords
plate
membrane
diaphragm pump
diaphragm
contact
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.)
Active
Application number
EP14179637.5A
Other languages
English (en)
French (fr)
Other versions
EP2921705A1 (de
Inventor
Giuseppe Orlandini
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.)
Annovi Reverberi SpA
Original Assignee
Annovi Reverberi SpA
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Filing date
Publication date
Application filed by Annovi Reverberi SpA filed Critical Annovi Reverberi SpA
Publication of EP2921705A1 publication Critical patent/EP2921705A1/de
Application granted granted Critical
Publication of EP2921705B1 publication Critical patent/EP2921705B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F04B43/0054—Special features particularities of the flexible members
    • 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
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • 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
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]

Definitions

  • the present invention relates to diaphragm pumps, and more in particular to a diaphragm plate group thereof.
  • Diaphragm pumps comprise at least a pump chamber, delimited by an elastomer membrane and provided with aspiration and delivery conduits.
  • the pumping effect is carried out by means of cyclic deformations of the membrane which respectively reduce and increase the volume of the pump chamber.
  • the membrane is substantially flat and it has been found that in flat membranes at present used, the material is stretched in traction, cyclically, by the plate in the alternating motion thereof.
  • the membrane is fashioned from a rubber-based material or an electrically nonconductive and chemically-inert thermoplastic elastomer, while the plate is generally made of metal.
  • the aim of the present invention is to obviate the above-mentioned drawbacks with a solution that is simple, reliable and relatively inexpensive.
  • the aim is attained by a diaphragm plate group, destined to be used in a diaphragm pump, having the characteristics cited in the independent claim.
  • the plate has a dome-shape, slightly convex and connected on an edge, so as to prevent splits on contact of the membrane with the edge.
  • the plate can be advantageously clad with non-stick material, such as for example Teflon (polytetrafluoroethylene).
  • the surface of the plate can advantageously comprise, on the face in contact with the membrane, lowered or dropped zones or parts, obtainable directly in the moulding process of the plate.
  • the membrane does not come into contact with the plate at the positions of the lowered parts, thus preventing sticking phenomena.
  • the membrane while maintaining its circular shape, it is not flat but it is shaped to be able to deform without being subjected to traction forces, but only to bending forces.
  • the lowered parts are preferably uniformly distributed on the surface of the plate. They preferably have a radial extension, and occupy at least thirty per cent of the surface of the plate.
  • Figure 1 is a schematic axial section of the pump chamber of an example of a diaphragm pump not covered by the claims but useful for understanding the invention, configured in a position in which the membrane is positioned in an intermediate point of the travel of the plate.
  • Figure 2 is a schematic axial section of the pump chamber of an embodiment of a diaphragm pump according to the invention, configured in a position in which the membrane is positioned in an intermediate point of the travel of the plate.
  • Figure 3 is a plan view of the elastomer membrane of Figs. 1 and 2 .
  • Figure 4 is a plan view of the activating plate of the membrane of Figs. 1 and 2 .
  • the figures illustrate a diaphragm pump 1 comprising the pump chamber 2 delimited by the membrane 3, 30 made of an elastomer material.
  • the delivery and aspiration valves that are part of the pump chamber are omitted, as they do not relate to the present invention.
  • the activating piston 4 is located beneath the membrane 3, 30.
  • the piston 4 exhibits a convexity thereof facing towards the membrane 3, 30.
  • the membrane 3 exhibits a hub 31 at the centre thereof.
  • the membrane is flat, while the piston exhibits a lowered part 41 able to receive an end of the hub.
  • the profile of the membrane seen in axial section and in rest position exhibits, at a centre thereof, a first circular concavity 32 facing towards the pump chamber 2 and connected to the hub 31, and a second circular concavity 33 facing in an opposite direction and connected with the edge of the membrane.
  • the membrane 3 is blocked between the piston 4 and a profiled plate 40.
  • the piston 4 and the profiled plate 40 are blocked together at the hub 31 on a pin 5, which is moved in alternating motion by the crank 51.
  • lowered parts 42 having a radial extension are illustrated, distributed in a regular fashion on all the convex surface of the plate which comes into contact with the membrane 3, 30.
  • the surface of the plate 40 facing towards the membrane 3 is clad with a non-stick material, such as Teflon (polytetrafluoroethylene) or an equivalent material.
  • a non-stick material such as Teflon (polytetrafluoroethylene) or an equivalent material.
  • the edge of the plate 40 is further slightly rounded so as to exclude cutting effects when it comes into contact with the membrane.
  • the friction between the diaphragm and the plate is reduced by the non-stick cladding of the plate.
  • a sticking phenomenon between the membrane and the plate is greatly reduced by the presence of the lowered parts 42, distributed uniformly on the surface of the plate in contact with the membrane, and occupying at least 30% of the surface of the plate.
  • the stresses induced in the membrane are practically limited to flexion stresses, while the sticking between the membrane and the plate is excluded by the shape of the plate.

Landscapes

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

Claims (6)

  1. Membranpumpe (1), umfassend eine Pumpkammer (2), die durch eine kreisförmige Membran (3) abgegrenzt ist, die zwischen einem Kolben (4) und einer kreisförmigen Platte (40) blockiert ist, wobei die kreisförmige Membran (3) aus einem Elastomermaterial ist und durch die kreisförmige Platte (40) aktiviert wird, die in abwechselnder Bewegung bewegt wird, und wobei die Platte (40) leicht konvex ist, wobei eine Konvexität davon zu der Membran (3) zeigt, wobei die Platte (40) direkt in Kontakt mit der Membran (3) ist und die Platte (40) auf einer gesamten Fläche davon, die zu der Membran (3) zeigt und dazu bestimmt ist, in Kontakt damit zu kommen, eine Reihe von vertieften Teilen (42) aufweist, dadurch gekennzeichnet, dass die Membran (3), gesehen in eine axiale Richtung, eine erste mittlere Konkavität (32) aufweist, die zu der Platte (40) zeigt, und eine zweite Konkavität (33), die konzentrisch zu der vorherigen ersten mittleren Konkavität (32) in eine entgegengesetzte Richtung ist, und am Rand der Membran (3) endet.
  2. Membranpumpe (1) nach Anspruch 1, dadurch gekennzeichnet, dass die vertieften Teile (42) gleichförmig auf der Fläche der Platte (40) verteilt sind.
  3. Membranpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die vertieften Teile insgesamt einen Abschnitt der Fläche der Platte gleich wie mindestens dreißig Prozent belegen.
  4. Membranpumpe (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Platte (40) einen abgerundeten Umfangsrand im axialen Abschnitt der Platte (40) aufweist.
  5. Membranpumpe (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Fläche der Platte (40), die in Kontakt mit der Membran (3) kommen soll, mit nicht klebrigem Material kaschiert ist.
  6. Membranpumpe (1) nach Anspruch 5, dadurch gekennzeichnet, dass das nicht klebrige Material Polytetrafluorethylen ist.
EP14179637.5A 2014-03-20 2014-08-04 Membranplattengruppe für Membranpumpen Active EP2921705B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITRE20140028 2014-03-20

Publications (2)

Publication Number Publication Date
EP2921705A1 EP2921705A1 (de) 2015-09-23
EP2921705B1 true EP2921705B1 (de) 2018-09-05

Family

ID=50943464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14179637.5A Active EP2921705B1 (de) 2014-03-20 2014-08-04 Membranplattengruppe für Membranpumpen

Country Status (4)

Country Link
US (1) US20150267694A1 (de)
EP (1) EP2921705B1 (de)
CN (1) CN104929924B (de)
DK (1) DK2921705T3 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107327391B (zh) * 2017-08-11 2020-07-03 宁波九缘菲力加泵业有限公司 微型隔膜泵上端盖
IT201800004722A1 (it) * 2018-04-19 2019-10-19 Pompa volumetrica a membrana
JP2020528978A (ja) * 2018-06-28 2020-10-01 チョウ，ソンアム 押出ポンピングモジュール及びこれを利用したダイアフラム流体供給装置

Family Cites Families (28)

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US2185784A (en) * 1938-05-27 1940-01-02 Proportioneers Inc Pump
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US2904876A (en) * 1954-05-12 1959-09-22 Acf Ind Inc Shaft end mounting for sealing and loop forming a pump diaphragm
US3071080A (en) * 1959-09-11 1963-01-01 Acf Ind Inc Shaft end mounting for sealing and loop forming a pump diaphragm
US3149572A (en) * 1961-11-13 1964-09-22 William E Davis Adjustable diaphragm pump
US3354831A (en) * 1966-11-04 1967-11-28 Weatherhead Co Piston diaphragm pump
DE2004227B2 (de) * 1970-01-30 1973-05-24 Knorr Bremse GmbH, 8000 München Membrankolben
US3911796A (en) * 1973-02-12 1975-10-14 Gates Rubber Co Diaphragm
DE3838141C2 (de) * 1988-11-10 1998-12-24 Knf Neuberger Gmbh Membranpumpe
DE3931516C2 (de) * 1989-09-21 1993-10-14 Ott Kg Lewa Membranpumpe mit mechanisch angetriebener Membran
US5335584A (en) * 1993-03-30 1994-08-09 Baird Dayne E Improved diaphragm
US5349896A (en) * 1993-06-14 1994-09-27 W. L. Gore & Associates, Inc. Pump diaphragm
DE4328559C5 (de) * 1993-08-25 2004-11-25 Knf-Neuberger Gmbh Membranpumpe mit wenigstens zwei Membranen
US5638737A (en) * 1995-11-27 1997-06-17 Quest Medical, Inc. Spline pumping assembly
US6079959A (en) * 1996-07-15 2000-06-27 Saint-Gobain Performance Plastics Corporation Reciprocating pump
US5894784A (en) * 1998-08-10 1999-04-20 Ingersoll-Rand Company Backup washers for diaphragms and diaphragm pump incorporating same
DE19906317C1 (de) * 1999-02-16 2000-10-19 Knf Flodos Ag Sursee Membranpumpe
DE10227192B4 (de) * 2002-06-18 2009-08-06 Ulman Dichtungstechnik Gmbh Verbundmembran für Membranpumpen
US6865981B2 (en) * 2003-03-11 2005-03-15 Ingersoll-Rand Company Method of producing a pump
JP2005163565A (ja) * 2003-11-28 2005-06-23 Toyota Industries Corp ダイヤフラム型ポンプ
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Also Published As

Publication number Publication date
CN104929924B (zh) 2019-05-10
CN104929924A (zh) 2015-09-23
DK2921705T3 (en) 2019-01-07
US20150267694A1 (en) 2015-09-24
EP2921705A1 (de) 2015-09-23

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