EP2921705A1 - Membranplattengruppe für Membranpumpen - Google Patents

Membranplattengruppe für Membranpumpen Download PDF

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Publication number
EP2921705A1
EP2921705A1 EP14179637.5A EP14179637A EP2921705A1 EP 2921705 A1 EP2921705 A1 EP 2921705A1 EP 14179637 A EP14179637 A EP 14179637A EP 2921705 A1 EP2921705 A1 EP 2921705A1
Authority
EP
European Patent Office
Prior art keywords
plate
membrane
diaphragm
plate group
convexity
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.)
Granted
Application number
EP14179637.5A
Other languages
English (en)
French (fr)
Other versions
EP2921705B1 (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
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 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 bur 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.
  • 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)
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 true EP2921705A1 (de) 2015-09-23
EP2921705B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800004722A1 (it) * 2018-04-19 2019-10-19 Pompa volumetrica a membrana

Families Citing this family (2)

* 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
WO2020004760A1 (ko) * 2018-06-28 2020-01-02 조성암 압출 펌핑모듈 및 이를 이용한 다아이프램 유체공급장치

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2185784A (en) * 1938-05-27 1940-01-02 Proportioneers Inc Pump
US3149572A (en) * 1961-11-13 1964-09-22 William E Davis Adjustable diaphragm pump
US5638737A (en) * 1995-11-27 1997-06-17 Quest Medical, Inc. Spline pumping assembly
US20050118041A1 (en) * 2003-11-28 2005-06-02 Shinya Yamamoto Diaphragm pump
EP2418385A1 (de) * 2010-03-30 2012-02-15 Safety-Kleen Europe Limited Membranpumpe

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418385A (en) * 1945-05-16 1947-04-01 Frederic S Wilcox Cooling system for internalcombustion engines
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
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
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
US20080253911A1 (en) * 2007-02-27 2008-10-16 Deka Products Limited Partnership Pumping Cassette
JP2010031653A (ja) * 2008-07-24 2010-02-12 Fujifilm Corp 凝集性液体の送液方法および記録媒体の製造方法
CA2767668C (en) * 2009-07-15 2017-03-07 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods
CN201679695U (zh) * 2010-01-29 2010-12-22 深圳市颜华守信科技有限公司 弧形隔膜片及使用该隔膜片的隔膜泵
CN202045946U (zh) * 2011-03-17 2011-11-23 上海麦特密封件有限公司 矿浆泵复合隔膜
CN104093980B (zh) * 2012-02-01 2016-12-21 大陆-特韦斯贸易合伙股份公司及两合公司 由电动机驱动的泵组件
US9046180B2 (en) * 2012-08-30 2015-06-02 Itt Manufacturing Enterprises Llc. Diaphragm and backing cushion shaping for increased membrane life

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2185784A (en) * 1938-05-27 1940-01-02 Proportioneers Inc Pump
US3149572A (en) * 1961-11-13 1964-09-22 William E Davis Adjustable diaphragm pump
US5638737A (en) * 1995-11-27 1997-06-17 Quest Medical, Inc. Spline pumping assembly
US20050118041A1 (en) * 2003-11-28 2005-06-02 Shinya Yamamoto Diaphragm pump
EP2418385A1 (de) * 2010-03-30 2012-02-15 Safety-Kleen Europe Limited Membranpumpe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800004722A1 (it) * 2018-04-19 2019-10-19 Pompa volumetrica a membrana
EP3557059A1 (de) * 2018-04-19 2019-10-23 Annovi Reverberi S.p.A. Volumetrische membranpumpe

Also Published As

Publication number Publication date
EP2921705B1 (de) 2018-09-05
CN104929924B (zh) 2019-05-10
DK2921705T3 (en) 2019-01-07
CN104929924A (zh) 2015-09-23
US20150267694A1 (en) 2015-09-24

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