EP0470342A1 - Membranpumpe - Google Patents

Membranpumpe Download PDF

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Publication number
EP0470342A1
EP0470342A1 EP91109443A EP91109443A EP0470342A1 EP 0470342 A1 EP0470342 A1 EP 0470342A1 EP 91109443 A EP91109443 A EP 91109443A EP 91109443 A EP91109443 A EP 91109443A EP 0470342 A1 EP0470342 A1 EP 0470342A1
Authority
EP
European Patent Office
Prior art keywords
membrane
diaphragm pump
diaphragm
pump according
signal
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.)
Withdrawn
Application number
EP91109443A
Other languages
German (de)
English (en)
French (fr)
Inventor
Wilfried Dipl.-Ing. Goes (Fh)
Gerhard Dipl.-Ing. Gebauer (Fh)
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.)
J Wagner GmbH
Original Assignee
J Wagner GmbH
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 J Wagner GmbH filed Critical J Wagner GmbH
Publication of EP0470342A1 publication Critical patent/EP0470342A1/de
Withdrawn legal-status Critical Current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 invention relates to a diaphragm pump with a diaphragm clamped in its outer edge region in a pump housing and drivable in an oscillating manner by a hydraulic medium, through which a delivery chamber of the diaphragm pump is separated from a drive chamber receiving the hydraulic medium, the diaphragm consisting of two with an axial spacing from one another arranged, an interior enclosing membrane disks is assembled, the size of which can be changed if one of the membrane disks is damaged.
  • the line part connecting the space between the individual membranes to the storage container has, at least in the clamping area of the membrane that is pressure-tight by 250 bar, only a very narrow to capillary passage cross section. In the case of a conveying medium which is particularly provided with solid particles, this line part clogs very easily, which leads to the failure of the flow indicator function.
  • the object of the invention is therefore to design a diaphragm pump of the aforementioned type in such a way that any damage to the diaphragm can be recognized at an early stage and that, in addition, hydraulic medium is reliably prevented from entering the delivery medium.
  • the construction effort required for this should be kept low, but there should still be a high sensitivity and a low susceptibility to interference when monitoring the membrane.
  • a diaphragm pump of the aforementioned type which has a membrane composed of two diaphragm disks arranged at an axial distance from one another and enclosing an interior, the size of the interior being changeable if one of the diaphragm disks is damaged, in that the Conveying chamber facing membrane disc, a signal generator and a signal sensor are arranged in the pump housing in the area of the drive chamber, which is connected to a device for electronic evaluation and amplification of the signals emitted by the signal sensor.
  • the diaphragm pump it is furthermore expedient to fill the interior of the diaphragm gas-free with an incompressible, preferably with a medium compatible with the conveying medium, for example with water, a dilution or the like, and / or to provide it with a vacuum so that the two diaphragm disks oscillate synchronously with one another in the intact state, but if there is a crack in one of the diaphragm disks, their axial distance from one another and / or from the signal pickup is changed by penetration of the delivery medium or the hydraulic medium.
  • an incompressible preferably with a medium compatible with the conveying medium, for example with water, a dilution or the like, and / or to provide it with a vacuum so that the two diaphragm disks oscillate synchronously with one another in the intact state, but if there is a crack in one of the diaphragm disks, their axial distance from one another and / or from the signal pickup is changed by penetration
  • an axially directed, prestressed compression spring can additionally be inserted into the interior of the membrane, preferably centrally.
  • the signal generator is formed by a high-energy magnet, preferably made of a samarium-cobalt alloy.
  • the signal transmitter centrally into the membrane disk facing the delivery chamber, preferably in a thickened portion formed thereon, the latter being injected into the membrane disk or inserted into a recess in the membrane disk and by ultrasonic or hot air welding by gluing, by pressing or the like. Can be firmly connected to this.
  • the signal pickup can be designed as a magnetoristic magnetic field sensor and, in order to generate a permanent magnetic bias field for stabilization, can be provided with a magnetic disc which is preferably arranged on the side facing away from the signal transmitter.
  • the signal pickup in a closed cylinder, preferably made of a non-ferromagnetic material, for example titanium, which should be inserted in the pump housing so as to be radially adjustable to the axis of the membrane.
  • a diaphragm pump according to the invention is formed in which the diaphragm is composed of two diaphragm disks, one of which has a signal transmitter which interacts with a fixedly arranged signal pickup, it is possible to operate the diaphragm in a very simple manner but nevertheless extremely reliably monitor and detect any damage to one of the two diaphragm disks at an early stage. If crack formation or breakage occurs in one of the diaphragm disks, at least one of the end positions of the diaphragm disk carrying the signal transmitter changes immediately in relation to the signal pickup, since the stored medium flows out of the double-walled diaphragm and medium is sucked into it or introduced under pressure.
  • this change in position can be detected and evaluated by a signal pickup, so that cracking in one of the membrane disks can already be detected. If the diaphragm disc facing the delivery chamber is damaged, the diaphragm pump will still be operational and no immediate interruption in operation is acceptable. Rather, the damaged membrane may be at an appropriate time, e.g. B. after the end of day work, without a major business interruption occurs.
  • the diaphragm disc facing the drive chamber is damaged, the space between the two diaphragm discs is filled with hydraulic medium; as a result, the diaphragm disk facing the delivery chamber is pressed into its upper end position, with the result that the pump no longer delivers.
  • the diaphragm pump 1 essentially consists of a driven diaphragm 21 clamped between two housing parts 2 and 3 provided with contact disks 4 and 5, by means of which a working chamber 6 is separated from a delivery chamber 7.
  • a working chamber 6 is separated from a delivery chamber 7.
  • the piston 11 acts on the membrane 21 via a liquid column located in the pressure chamber 6.
  • the system disc 4 is provided with holes 14 through which a space 13 between the membrane 21 and the disc 4 is thus connected to the working chamber 6.
  • Via a suction line 16 the working chamber 6 is connected to a storage container 15, to which a return line 17, into which a pressure relief valve, not shown, is used to reduce pressure peaks, is connected.
  • a suction stroke the medium to be conveyed is sucked into the delivery chamber 7 via a suction line 8, which is equipped with an inlet valve 9, and in a pressure line 10, which is of course also equipped with a check valve (not shown), during a pressure stroke with the inlet valve 9 closed. promoted.
  • the membrane 21, as can be seen in detail in FIG. 3, consists of two membrane disks 22 and 23 arranged at an axial distance from one another, which thus enclose an interior space 24 and each have a central thickening 26 and 27 and, following an outer clamping area, a Walk zone 29 and 30 have.
  • a prestressed compression spring 25 is inserted into the interior 24, which in the exemplary embodiment shown is filled with a gas-free incompressible liquid which is compatible with the medium to be conveyed.
  • a signal transmitter 31 preferably in the form of a high-energy magnet
  • a signal pickup 32 which is matched to this is inserted into the housing part 2 and is connected via a signal line 33 to an electronic device 34 is connected to the evaluation and amplification of the signals emitted by the signal pickup 31.
  • the signals can be evaluated and amplified in such a way that they can be used as optical and / or acoustic signals and / or for switching off the diaphragm pump 1.
  • the high-pressure pump 1 can thus be taken out of operation before the diaphragm 21 is damaged in such a way that the hydraulic medium in the working chamber 6 reaches the delivery chamber 7. Long downtimes and larger rejects can thus be reliably avoided.
  • the signal pickup 32 according to FIG. 3 can be equipped with a magnetic plate 35 on the side facing away from the membrane disk 23, by means of which the signal pickup 32 designed as a magnetic field sensor is stabilized.
  • the signal pickup 32 is cast in a cylinder 36 made of a non-ferromagnetic material, for example titanium, which is in a bore 37 in the housing part 2 and - in the embodiment according to FIG. 3 - the contact disk 4 is used.
  • a threaded bushing 38 With the aid of a threaded bushing 38, the cylinder 36, through which the signal sensor 32 is thus protected from pressurization by the hydraulic medium in the working chamber 6, can be adjusted radially to the axis of the diaphragm 21, so that the signal sensor 32 is aligned perpendicular to the signal sensor 31 can.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
EP91109443A 1990-08-08 1991-06-08 Membranpumpe Withdrawn EP0470342A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4025109 1990-08-08
DE19904025109 DE4025109C1 (enrdf_load_stackoverflow) 1990-08-08 1990-08-08

Publications (1)

Publication Number Publication Date
EP0470342A1 true EP0470342A1 (de) 1992-02-12

Family

ID=6411844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91109443A Withdrawn EP0470342A1 (de) 1990-08-08 1991-06-08 Membranpumpe

Country Status (3)

Country Link
EP (1) EP0470342A1 (enrdf_load_stackoverflow)
JP (1) JPH04234581A (enrdf_load_stackoverflow)
DE (1) DE4025109C1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19949831B4 (de) * 1999-10-15 2007-08-02 Wika Alexander Wiegand Gmbh & Co Membrandruckmittler
DE102009052244A1 (de) * 2009-11-06 2011-05-12 Carl Freudenberg Kg Sensierende Membran
US11950677B2 (en) 2019-02-28 2024-04-09 L'oreal Devices and methods for electrostatic application of cosmetics
DE102020132911A1 (de) 2020-12-10 2022-06-15 Prominent Gmbh Perforierschutz für magnetische Membrankopplung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2051202A5 (enrdf_load_stackoverflow) * 1969-06-24 1971-04-02 Kreis Philipp
EP0328143A1 (de) * 1988-02-10 1989-08-16 Wolfgang Eberhard Henkel Vorrichtung zur Steuerung des Hydraulikkreises einer Kolbenmembranpumpe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1552305A (enrdf_load_stackoverflow) * 1967-12-15 1969-01-03
DE2624129A1 (de) * 1975-09-08 1977-03-31 Ring Membranpumpe
US4934902A (en) * 1984-09-27 1990-06-19 Myron Mantell Failure sensing device for a diaphragm pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2051202A5 (enrdf_load_stackoverflow) * 1969-06-24 1971-04-02 Kreis Philipp
EP0328143A1 (de) * 1988-02-10 1989-08-16 Wolfgang Eberhard Henkel Vorrichtung zur Steuerung des Hydraulikkreises einer Kolbenmembranpumpe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PUMPS, POMPES, PUMPEN. no. 5, Mai 1988, MORDEN GB Seiten 111 - 113; Braüer: "diaphragm metering pumps in chemical and synthetic processes" *

Also Published As

Publication number Publication date
JPH04234581A (ja) 1992-08-24
DE4025109C1 (enrdf_load_stackoverflow) 1991-11-07

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