EP0582628A1 - Mehrlagen-membran mit leckage-ableitung für membranpumpen. - Google Patents
Mehrlagen-membran mit leckage-ableitung für membranpumpen.Info
- Publication number
- EP0582628A1 EP0582628A1 EP92909856A EP92909856A EP0582628A1 EP 0582628 A1 EP0582628 A1 EP 0582628A1 EP 92909856 A EP92909856 A EP 92909856A EP 92909856 A EP92909856 A EP 92909856A EP 0582628 A1 EP0582628 A1 EP 0582628A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- membrane according
- leakage
- knitted fabric
- layer 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.)
- Granted
Links
- 239000004744 fabric Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 230000002787 reinforcement Effects 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims abstract description 4
- 239000012528 membrane Substances 0.000 claims description 97
- 239000004952 Polyamide Substances 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000000806 elastomer Substances 0.000 claims description 5
- 229920002647 polyamide Polymers 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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 derivation for diaphragm pumps, in particular hydraulically actuated pumps, consisting of at least two individual diaphragms lying one above the other and fixed at a circumferential clamping point, between each of which there is an intermediate space.
- Multi-layer diaphragms of this type have the advantage that a diaphragm rupture can be indicated before the working and pumped medium come into contact with each other.
- the middle membrane is 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 outward along the radial slots of the middle membrane and can be fed there to a suitable monitoring and signaling device.
- the superimposed membranes have to act as a single membrane in their entirety. by Glue to be connected.
- 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 noticeably affects the operational safety of the pump. Increased rigidity must also be accepted.
- 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 invention has for its object to form a multi-layer membrane of the type mentioned in such a way that the discharge of the leak from the space between the multi-layer membrane is created with the simplest of means, without sacrificing operational reliability.
- the space between the multilayer membrane should also be permeable to higher-viscosity media in both the low-pressure and high-pressure range so that in the event of a membrane breakage, conveying or penetrating between the membrane systems. Hydraulic medium can leak around the periphery of the membrane for the purpose of leakage monitoring or reporting.
- a multilayer membrane of the type mentioned at the outset in that at least one space with at least one wrinkle-free and force-free layer following the deformation of the individual membranes and also liquid-permeable layer made of a scrim, knitted fabric, knitted fabric or fabric made of hard filaments is provided and that the intermediate space provided with this layer or these layers communicates in the area of the clamping point with a leakage discharge line accommodated in a surrounding housing.
- the material used here e.g. made of metal or ceramic or plastic
- the multilayer membrane can be designed in such a way that it concerns 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 multilayer membrane can be designed in such a way that at least one layer is in the form of 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 in such a way that at least one layer is designed as a polyamide knitted fabric. The hardness of the polyamide can be chosen so that the layer remains liquid-permeable even at high pressures.
- the layer is a very inexpensive component.
- the multilayer membrane can be designed such that at least one layer is formed by 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 and from this surface protrudes.
- the fabric reinforcement is usually placed inside the membrane.
- this proposal according to the invention uses a plastic fabric, for example made of polyester or polyamide, with a texture that is as coarse as possible, 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 multilayer membrane can be designed such that at least one layer (9) as a separate intermediate layer between two on top of one another! single membranes is formed.
- Layer thickness and material can be used here 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 multilayer membrane can be designed in such a way that a liquid which is inert to the conveying and hydraulic medium is located in the intermediate spaces and, in the event of a membrane breakage, hydraulically transmits a leakage message to the outside.
- a liquid which is inert to the conveying and hydraulic medium is located in the intermediate spaces and, in the event of a membrane breakage, hydraulically transmits a leakage message to the outside.
- 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 such that the individual membranes are spherical shaped membranes made of elastomers, which are mechanically connected to one another, for example via two membrane braces 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 tear in the area of greatest tension, ie 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 made with chemically highly resistant plastics such as PTFE.
- 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 layer facing the medium to be pumped and the other membrane plate clamps the two membrane systems together using a screw connection.
- the multi-layer membrane can be designed such that the individual membranes each have a ring-like bead on their outer edges, 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-like cross section. For this purpose, 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 multilayer membrane can be designed such that the circumferential groove or the circumferential grooves is or are connected to the environment outside the housing.
- a possible leakage can be visually detected by optical monitoring on the outside of the pump housing.
- the multilayer membrane can be designed such that the circumferential groove or grooves is or are connected to a leakage detection device.
- the leakage can be done automatically, for example by electr see evaluation of a liquid sensor can be detected.
- the multilayer membrane can be designed such that the leakage detection device is a pressure sensor or pressure switch.
- 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.
- two exemplary embodiments of the multilayer membrane according to the invention are illustrated with the aid of a drawing.
- 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 single membranes 1, 2 are mechanically clamped over two membranes 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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Diaphragms And Bellows (AREA)
- Reciprocating Pumps (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4114439 | 1991-05-03 | ||
DE4114439 | 1991-05-03 | ||
PCT/DE1992/000351 WO1992019866A1 (de) | 1991-05-03 | 1992-05-04 | Mehrlagen-membran mit leckage-ableitung für membranpumpen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0582628A1 true EP0582628A1 (de) | 1994-02-16 |
EP0582628B1 EP0582628B1 (de) | 1997-01-22 |
Family
ID=6430886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92909856A Expired - Lifetime EP0582628B1 (de) | 1991-05-03 | 1992-05-04 | Mehrlagen-membran mit leckage-ableitung für membranpumpen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0582628B1 (de) |
JP (1) | JP3133067B2 (de) |
AT (1) | ATE148202T1 (de) |
DE (1) | DE59207956D1 (de) |
WO (1) | WO1992019866A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10231920B4 (de) * | 2002-07-15 | 2006-10-19 | SCHÜTZE, Thomas | Mehrlagen-Membran |
Families Citing this family (13)
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 |
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 |
EP2693051B1 (de) | 2011-04-27 | 2019-06-12 | CKD Corporation | Mehrschichtige membran |
CN105804837B (zh) * | 2011-08-22 | 2018-12-14 | 康明斯排放处理公司 | 具有泄漏旁路的尿素溶液泵 |
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 |
US20150104336A1 (en) * | 2013-10-11 | 2015-04-16 | Checkpoint Fluidic Systems International, Ltd. | Scalable Pumping Mechanism Utilizing Anti-Synchronized Poly-Diaphragm Stack |
DE102016201182A1 (de) | 2016-01-27 | 2017-07-27 | Siemens Aktiengesellschaft | Membranpumpe mit Staubansaugung von unten |
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 |
DE102016216012A1 (de) | 2016-08-25 | 2018-03-01 | Siemens Aktiengesellschaft | Membranpumpe mit porösem, gewölbtem Aluminiumfilter |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR990698A (fr) * | 1944-03-29 | 1951-09-25 | Perfectionnements aux pompes à diaphragme | |
JPS4934001A (de) * | 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 |
-
1992
- 1992-05-04 JP JP04508953A patent/JP3133067B2/ja not_active Expired - Fee Related
- 1992-05-04 AT AT92909856T patent/ATE148202T1/de not_active IP Right Cessation
- 1992-05-04 EP EP92909856A patent/EP0582628B1/de not_active Expired - Lifetime
- 1992-05-04 DE DE59207956T patent/DE59207956D1/de not_active Expired - Lifetime
- 1992-05-04 WO PCT/DE1992/000351 patent/WO1992019866A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9219866A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10231920B4 (de) * | 2002-07-15 | 2006-10-19 | SCHÜTZE, Thomas | Mehrlagen-Membran |
Also Published As
Publication number | Publication date |
---|---|
WO1992019866A1 (de) | 1992-11-12 |
EP0582628B1 (de) | 1997-01-22 |
JP3133067B2 (ja) | 2001-02-05 |
DE59207956D1 (de) | 1997-03-06 |
JPH06506998A (ja) | 1994-08-04 |
ATE148202T1 (de) | 1997-02-15 |
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