EP0582628B1 - Membrane a couches multiples a conduit d'evacuation de fuites pour pompes a membranes - Google Patents

Membrane a couches multiples a conduit d'evacuation de fuites pour pompes a membranes Download PDF

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Publication number
EP0582628B1
EP0582628B1 EP92909856A EP92909856A EP0582628B1 EP 0582628 B1 EP0582628 B1 EP 0582628B1 EP 92909856 A EP92909856 A EP 92909856A EP 92909856 A EP92909856 A EP 92909856A EP 0582628 B1 EP0582628 B1 EP 0582628B1
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EP
European Patent Office
Prior art keywords
layer
diaphragm according
leakage
diaphragm
ply
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
EP92909856A
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German (de)
English (en)
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EP0582628A1 (fr
Inventor
Hans Willi Meinz
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.)
REGIPUR POLYURETHAN-ANLAGENTECHNIK GMBH
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REGIPUR Polyurethan-Anlagentechnik GmbH
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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 invention relates to a multi-layer diaphragm with leakage discharge for diaphragm pumps, in particular hydraulically actuated pumps, consisting of at least two individual diaphragms lying one on top of the other, fixed at a circumferential clamping point, between each of which there is a space according to the preamble of claim 1, known from DE-A - 2620228.
  • Multilayer membranes of this type have the advantage that a membrane break can be indicated before the working medium and the conveying medium come into contact with one another.
  • a known multi-layer membrane (US-PS 31 31 638) several, but at least three membranes are arranged one on top of the other, the central membrane being perforated and provided with radially outwardly conductive slots. One or more of the slots are connected to the environment. If one of the two outer membranes in contact with the conveying or hydraulic medium breaks, the medium passing through the breaking point is directed outwards along the radial slots of the middle membrane and can be fed there to a suitable monitoring and signaling device.
  • the superimposed membranes In order to act as a single membrane in their entirety, the superimposed membranes must be connected to one another by adhesive bonding. However, this adhesive connection is subject to considerable shear forces during operation, particularly at higher pressures, loads the diaphragms very unfavorably during the suction stroke and therefore impairs operational safety the pump noticeably. Increased rigidity must also be accepted.
  • a further known multi-layer membrane (DE-PS 18 00 018) at least three individual membranes lying against one another are also provided, but these are not bonded but are hydraulically coupled by a hydraulic medium that completely fills the slots in the central membrane.
  • a hydraulic coupling can only be properly implemented in the high-pressure range only in the case of flat plate-shaped membranes made of relatively hard materials, which, however, can only perform a very small stroke.
  • the slotted membrane system causes problems at the clamping point, because in the high pressure area a relatively high surface pressure is necessary at the clamping point to seal the membranes outwards. A high surface pressure, however, deforms the slots in the middle membrane in such a way that a possible leak can no longer be dissipated through the closed slots.
  • DE-PS 31 46 222 are porous, in the radial and axial direction permeable intermediate layers, e.g. in the form of fleece, between the individual membranes.
  • permeable intermediate layers e.g. in the form of fleece
  • such relatively soft, porous intermediate layers lose their porosity with increasing surface pressure, i.e. in the higher pressure range.
  • the intermediate layers serve the purpose of enabling the removal of the leakage from the intermediate space of the multi-layer membrane with the simplest of means in the case of a multi-layer membrane of the type mentioned at the outset, without sacrificing operational reliability.
  • the space between the multi-layer membrane should also be permeable to higher-viscosity media in both the low-pressure and high-pressure range, so that if a membrane breaks, or hydraulic medium can escape at the periphery of the membrane for the purpose of leakage monitoring or reporting.
  • At least one intermediate space is provided with at least one wrinkle-free and force-free layer of a scrim, knitted fabric, knitted fabric or fabric made of hard filaments that is permeable to liquid even under pressure, and the intermediate space provided with this layer / these layers in the area of the clamping point communicating with a leakage drain accommodated in a surrounding housing.
  • the material used here e.g. made of metal or ceramic or plastic
  • Claim 1 solves the task of improving the life of the membrane and still enable its coating and chemically highly resistant plastics.
  • the multi-layer membrane can be designed such that the individual membranes are dome-shaped shaped membranes made of elastomers, which are mechanical. e.g. are connected to each other via two membrane plates clamped by means of a screw connection.
  • the pump stroke is carried out by stretching the diaphragm in one and in the opposite direction. Repeated stretching exposes both the membranes and the tissue reinforcement to constant internal tension so that they tend to be in the area of greatest tension, i.e. tear in the middle of the membrane.
  • the service life of such flat membranes is therefore short and they have to be changed accordingly often.
  • Another disadvantage of flat membranes is that, due to the high internal stresses, they are not compatible with highly chemically resistant plastics, e.g. PTFE, can be coated, as these cannot follow the strains and therefore detach from the elastomer.
  • the mechanical coupling of the individual membranes is a structurally particularly simple solution. In addition, it is also completely leak-tight if one membrane plate is vulcanized into the membrane system facing the pumping medium and the other membrane plate clamps the two membrane systems together using a screw connection.
  • the multilayer membrane can be designed so that it is multiaxial or multidirectional scrims, knitted fabrics, knitted fabrics or fabrics. With such a material it is possible to work without wrinkles and forces even with a relatively large layer thickness.
  • the multi-layer membrane can be designed so that at least one layer is formed as a knitted fabric. This results in a particularly advantageous adaptation of the layer to the curvature of the individual membranes at low cost.
  • the multilayer membrane can be designed so that at least one layer is formed as a knitted polyamide fabric.
  • the hardness of the polyamide can be chosen so that the layer is permeable to liquid even at high pressures remains.
  • the layer is a very inexpensive component.
  • the multilayer membrane can be designed such that at least one layer is formed from a fiber reinforcement consisting of a scrim, knitted fabric, knitted fabric or fabric made of hard filaments, which is arranged on one of the mutually facing surfaces of two superimposed individual membranes protrudes from this surface.
  • the fabric reinforcement is usually placed inside the membrane.
  • a plastic fabric e.g. Made of polyester or polyamide, with a rough texture, so that the fibers of the fabric are still partially outside the rubber-like membrane base material.
  • the protruding texture facilitates the drainage of accumulated leakage between the membrane systems in the event of a membrane breakage.
  • the texture of the protruding tissue can be sufficient for the leakage fluid to drain, particularly in the case of low-viscosity conveying and hydraulic fluids and when the pressures are not extremely high.
  • the multi-layer membrane can be designed so that at least one layer (9) is formed as a separate intermediate layer between two individual membranes lying one on top of the other.
  • the layer thickness and material can be well adapted to the respective requirements.
  • the combination of such a layer forming a separate intermediate layer with a layer formed by a reinforcing insert can be expedient.
  • the multi-layer membrane can be designed so that there is a liquid inert to the delivery and hydraulic medium in the gaps, which transmits a leakage mela hydraulically to the outside in the event of a membrane rupture.
  • a liquid inert to the delivery and hydraulic medium in the gaps which transmits a leakage mela hydraulically to the outside in the event of a membrane rupture.
  • Such an inert liquid which is in communication with the environment outside the pump housing, enables a quick response in the event of a diaphragm rupture, so that there is the possibility of a leakage message long before the multi-layer diaphragm becomes leaky as a whole.
  • the multilayer membrane can be designed so that the individual membranes each have at their outer edges a round ring-like bead, which is tightly clamped in a correspondingly formed circumferential groove in the housing.
  • the clamping point of the multi-layer membrane serves on the one hand as centering and fixing the individual membranes; on the other hand, it must seal the fluid and the hydraulic medium space from the outside.
  • the simplest method of clamping a membrane in a sealing manner is based on the principle of a round sealing ring, which has a semicircular to triangular cross-section.
  • a round ring-like bead is attached to the outer circumference of the individual membranes and the clamping point in the housing is designed as a correspondingly shaped groove.
  • the multi-layer membrane can be designed so that the circumferential groove or the circumferential grooves with the environment outside the housing in connection stent or.
  • a possible leakage can be visually detected by optical monitoring on the outside of the pump housing.
  • the multilayer membrane can be designed so that the circumferential groove or grooves is or are connected to a leakage detection device.
  • the leakage can be carried out automatically, e.g. by electronic evaluation of a liquid sensor.
  • the multilayer membrane can be designed such that the leakage detection device is a pressure sensor or Pressure switch is.
  • the leakage report can be made continuously using a pressure sensor or discontinuously using a pressure switch.
  • the pressure sensor has the advantage that a creeping diaphragm rupture is noticeable through a slowly increasing pressure build-up.
  • the pressure switch is probably the cheapest automatic signaling device, but can only be set to a fixed value, which then outputs the leakage message without warning.
  • the drawing shows a section of a longitudinally cut diaphragm pump with a multi-layer diaphragm consisting of two individual diaphragms 1, 2, which is clamped between the housing parts 3, 4.
  • the two individual membranes 1, 2 are mechanically tensioned via two membrane plates 5, 6 and a screw connection.
  • the individual membranes 1, 2 each have a round-ring-like bead 7, 8 with a triangular cross section on their outer edges.
  • a layer which is permeable to liquid even under pressure here connects the intermediate space 10 between the individual membranes 1, 2 with a groove 11 located in the housing 3, 4.
  • the layer 9 is designed as a knitted fabric and lies as a blank between the individual membranes 1, 2. It consists of textured polyamide filament yarn of type 6.6.
  • the groove 11 communicates with the surroundings outside the housing 3, 4 via a bore 12.
  • a bore 13 is provided for receiving a pressure sensor or pressure switch (not shown).
  • layer 9 is of a fabric reinforcement is formed, which is embedded in a single membrane 1, 2 and protrudes from the surface of the single membrane 1, 2 facing the adjacent single membrane 1, 2. This results in an above-mentioned liquid-permeable texturing.
  • Both mutually facing surfaces of two individual membranes 1, 2 delimiting an intermediate space 10 can be provided with such a texturing.

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

Claims (13)

  1. Membrane multicouche à dérivation de fuite pour pompes à membrane, en particulier pour pompes à actionnement hydraulique, formée d'au moins deux membranes individuelles superposées qui sont immobilisées au niveau d'un point de serrage circulaire et entre lesquelles se trouve un espace intermédiaire, étant précisé qu'au moins un espace intermédiaire est pourvu d'au moins une couche (9) perméable au liquide même sous pression et constituée d'une nappe, d'un tissu à mailles ou d'un tissu composés de filaments durs, et que l'espace intermédiaire (10) pourvu de cette ou de ces couches (9) communique, dans la zone du point de serrage, avec une dérivation de fuite (11, 12, 13 ) logée dans une enveloppe environnante (3, 4), caractérisée en ce que les membranes individuelles sont des membranes profilées en forme de calottes qui sont reliées entre elles mécaniquement dans la zone centrale.
  2. Membrane multicouche selon la revendication 1, caractérisée en ce que la liaison mécanique se fait grâce à deux disques de membranes (5, 6) serrés à l'aide d'une liaison par vis.
  3. Membrane multicouche selon la revendication 2, caractérisée en ce qu'un disque de membrane est vulcanisé dans la couche de membrane tournée vers l'agent déplacé, et en ce que l'autre disque de membrane relie par serrage les deux membranes individuelles (1, 2) grâce à une liaison par vis.
  4. Membrane multicouche selon la revendication 1, caractérisée en ce qu'au moins une couche (9) est formée à partir d'une nappe, d'un tissu à mailles ou d'un tissu multiaxiaux ou multidirectionnels.
  5. Membrane multicouche selon l'une des revendications précédentes, caractérisée en ce qu'au moins une couche est conçue comme un tissu maillé.
  6. Membrane multicouche selon la revendication 5, caractérisée en ce qu'au moins une couche est conçue comme un tissu maillé en polyamide.
  7. Membrane multicouche selon l'une des revendications précédentes, caractérisée en ce qu'au moins une couche est formée par un renforcement par fibres qui comprend une nappe, un tissu à mailles ou un tissu composés de filaments durs, qui est disposé sur l'une des surfaces tournées l'une vers l'autre de deux membranes individuelles superposées et qui dépasse de cette surface.
  8. Membrane multicouche selon l'une au moins des revendications précédentes, caractérisée en ce qu'au moins une couche (9) est conçue comme une couche intermédiaire séparée entre deux membranes individuelles superposées.
  9. Membrane multicouche selon l'une des revendications précédentes, caractérisée en ce qu'il est prévu, dans les espaces intermédiaires (10), un liquide inerte par rapport à l'agent déplacé et à l'agent hydraulique, qui, en cas de rupture de la membrane, transmet à l'extérieur un message de fuite par voie hydraulique.
  10. Membrane multicouche selon l'une des revendications précédentes, caractérisée en ce que les membranes individuelles (1, 2) comportent, sur leur bord extérieur, un renflement annulaire circulaire (7, 8) qui est serré de façon étanche dans une rainure circulaire (11) conçue en conséquence, dans l'enveloppe (3, 4).
  11. Membrane multicouche selon la revendication 10, caractérisée en ce que la ou les rainures circulaires (11) communiquent avec l'environnement à l'extérieur de l'enveloppe (3, 4).
  12. Membrane multicouche selon la revendication 11, caractérisée en ce que la ou les rainures circulaires (11) communiquent avec un dispositif de signalisation de fuite.
  13. Membrane multicouche selon la revendication 12, caractérisée en ce que le dispositif de signalisation de fuite est un capteur de pression ou un interrupteur à pression.
EP92909856A 1991-05-03 1992-05-04 Membrane a couches multiples a conduit d'evacuation de fuites pour pompes a membranes Expired - Lifetime EP0582628B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4114439 1991-05-03
DE4114439 1991-05-03
PCT/DE1992/000351 WO1992019866A1 (fr) 1991-05-03 1992-05-04 Membrane a couches multiples a conduit d'evacuation de fuites pour pompes a membranes

Publications (2)

Publication Number Publication Date
EP0582628A1 EP0582628A1 (fr) 1994-02-16
EP0582628B1 true EP0582628B1 (fr) 1997-01-22

Family

ID=6430886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92909856A Expired - Lifetime EP0582628B1 (fr) 1991-05-03 1992-05-04 Membrane a couches multiples a conduit d'evacuation de fuites pour pompes a membranes

Country Status (5)

Country Link
EP (1) EP0582628B1 (fr)
JP (1) JP3133067B2 (fr)
AT (1) ATE148202T1 (fr)
DE (1) DE59207956D1 (fr)
WO (1) WO1992019866A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5776098A (en) * 1995-08-03 1998-07-07 Medela, Incorporated Diaphragm pump and pump mounted in a carrying case useful in breast pumping
DE19906317C1 (de) * 1999-02-16 2000-10-19 Knf Flodos Ag Sursee Membranpumpe
DE19925508A1 (de) * 1999-06-04 2000-12-21 Freudenberg Carl Fa Einrichtung zur Erkennung von Undichtheiten an Membranen
DE10231920B4 (de) * 2002-07-15 2006-10-19 SCHÜTZE, Thomas Mehrlagen-Membran
DE10233561B4 (de) 2002-07-24 2008-02-21 Prominent Dosiertechnik Gmbh Sicherheitsmembran für eine Membranpumpe
JP4578981B2 (ja) * 2005-01-06 2010-11-10 トヨタ自動車株式会社 カートリッジタンクおよび塗装機
WO2012147477A1 (fr) 2011-04-27 2012-11-01 シーケーディ株式会社 Diaphragme multicouche
RU2573070C2 (ru) * 2011-08-22 2016-01-20 Камминз Эмишн Солюшн Инк. Насосы для раствора мочевины, содержащие обводной канал утечки
CN103362793A (zh) * 2013-07-26 2013-10-23 胜瑞兰工业设备（苏州）有限公司 一种编织丝网引导隔膜泄漏装置
WO2015054598A1 (fr) * 2013-10-11 2015-04-16 Checkpoint Fluidic Systems International, Ltd. Mécanisme de pompage pouvant être adapté à la taille utilisant un empilement de poly-diaphragmes anti-synchronisés
DE102016201182A1 (de) 2016-01-27 2017-07-27 Siemens Aktiengesellschaft Membranpumpe mit Staubansaugung von unten
DE102016216012A1 (de) 2016-08-25 2018-03-01 Siemens Aktiengesellschaft Membranpumpe mit porösem, gewölbtem Aluminiumfilter
DE102016216006A1 (de) * 2016-08-25 2018-03-01 Siemens Aktiengesellschaft Doppelmembran für eine Staubpumpe
DE102016216016A1 (de) 2016-08-25 2018-03-15 Siemens Aktiengesellschaft Herstellung eines porösen Aluminiumfilters für eine Membranpumpe

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR990698A (fr) * 1944-03-29 1951-09-25 Perfectionnements aux pompes à diaphragme
JPS4934001A (fr) * 1972-07-31 1974-03-29
SE7700353L (sv) * 1976-01-20 1977-07-21 Warwick Pump & Eng Co Hogtryckspump
DE2620228A1 (de) * 1976-05-07 1977-11-10 Bran & Luebbe Kolbenmembranpumpe
FR2566846B1 (fr) * 1984-06-27 1986-12-12 Clextral Membrane pour pompe a commande ou actionnement hydraulique
IT1189160B (it) * 1986-06-11 1988-01-28 Nuovopignone Ind Meccaniche & Dispositivo perfezionanto di pompaggio,particolarmente adatto a comprimere fluidi in alti fondali
US4864918A (en) * 1986-11-07 1989-09-12 The Gates Rubber Company Thermoplastic diaphragm
FR2624922B1 (fr) * 1987-12-17 1990-04-27 Milton Roy Dosapro Dispositif de detection de rupture d'une membrane de pompe a membrane
US5062770A (en) * 1989-08-11 1991-11-05 Systems Chemistry, Inc. Fluid pumping apparatus and system with leak detection and containment
DE3931516C2 (de) * 1989-09-21 1993-10-14 Ott Kg Lewa Membranpumpe mit mechanisch angetriebener Membran

Also Published As

Publication number Publication date
EP0582628A1 (fr) 1994-02-16
JPH06506998A (ja) 1994-08-04
WO1992019866A1 (fr) 1992-11-12
DE59207956D1 (de) 1997-03-06
JP3133067B2 (ja) 2001-02-05
ATE148202T1 (de) 1997-02-15

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