EP0493175B1 - Pompe à membrane à commande hydraulique pour pressions élevées - Google Patents

Pompe à membrane à commande hydraulique pour pressions élevées Download PDF

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Publication number
EP0493175B1
EP0493175B1 EP91403386A EP91403386A EP0493175B1 EP 0493175 B1 EP0493175 B1 EP 0493175B1 EP 91403386 A EP91403386 A EP 91403386A EP 91403386 A EP91403386 A EP 91403386A EP 0493175 B1 EP0493175 B1 EP 0493175B1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
pump
thick
membrane
spacer
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
EP91403386A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0493175A1 (fr
Inventor
Rémy Lefebvre
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.)
Dosapro Milton Roy SA
Original Assignee
Dosapro Milton Roy SA
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 Dosapro Milton Roy SA filed Critical Dosapro Milton Roy SA
Publication of EP0493175A1 publication Critical patent/EP0493175A1/fr
Application granted granted Critical
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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
    • 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
    • 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

Definitions

  • Hydraulically operated diaphragm pumps for high pressures generally have a thin metallic diaphragm (made of stainless steel), deformable in its center in an inelastic manner, arranged between a hydraulic control chamber and a working chamber.
  • the movement of the center of the membrane is of limited amplitude so that obtaining a large flow, all other things being equal, imposes a great rate on the pump.
  • the aim of the present invention is to provide a solution capable of detecting diaphragm rupture in a metal diaphragm pump for high pressures by virtue of the installation of an interlayer material which resists compression well. high without significant deformation while not altering the functioning of the pump, in particular its suction height.
  • the diaphragm located between the hydraulic control chamber and the working chamber, is composite and comprises, between two thin metallic membranes, a thick intermediate membrane of synthetic material, of high resistance to crushing and in the form of an elastically deformable arch whose concave side faces the working chamber.
  • the thick intermediate membrane has made it possible to have an intermediate volume which does not collapse during the high discharge pressure which can therefore be monitored to detect rupture of the membranes.
  • the thick diaphragm comprises drainage channels establishing communication between each of its faces and a radial channel disposed opposite a diaphragm rupture detection channel, formed in the pump body.
  • the body comprises an annular spacer extending between the metal membranes outside the thick membrane, the nip extending extending astride the spacer and on the periphery thick membrane.
  • the pump head is defined by two parts 1 and 2 of a pump body and by a spacer 3 interposed between them. These elements 1, 2 and 3 are clamped axially on each other by pinching, at the level of the annular spacer 3, a composite membrane 4 which will be described in more detail below.
  • This composite membrane constitutes the movable dividing wall for a working (or pumping) chamber 5 and a hydraulic control chamber 6.
  • the chamber 5 is, in known manner, connected to a suction duct 7 and to a discharge duct 8, by means of one-way valves 9 and 10.
  • the fluid contained in the chamber 5 is discharged towards the duct 8 when the membrane 4 is moved to the left of the figure.
  • the movement to the right creates a suction of the fluid from the suction pipe 7 through the valve 9.
  • the movement of the membrane 4 is created by the alternating movement of a piston 11 in the hydraulic control chamber 6.
  • the control fluid pushed to the left of the figure, moves the membrane 4 also to the left (delivery).
  • the composite membrane 4, according to the invention comprises two outer membranes 12 and 13, metallic, for example made of stainless steel. They are thin to have a certain non-elastic deformability. They are manufactured so that their surface is greater than that of the disc of the same diameter. These membranes are pinched by their peripheral zone respectively between the part 1 of the pump body and the annular spacer 3 and between the part 2 of the body and this spacer.
  • This membrane 14 is thick and shaped, that is to say that at rest it takes the form of a bowl or cone shown in the figure, the a concave face 14 facing the pumping chamber 5.
  • This is elastically deformable membrane that is to say, under the effect of pressure on its convex face, it has a tendency to flatten or to to dig. When this pressure application ceases, the membrane 14 resumes its initial shape elastically.
  • the material of this membrane is a synthetic material having a high resistance to compression (of the order of 500 kg / cm2 without deformation): Mention will be made, to illustrate this kind of material, of products known commercially under the names of DELRIN (polyacetate ) or ARNITE.
  • This thick membrane 14 is accommodated within the annular spacer 3 and has channels 15, represented in the figure, which establish communication between the concave faces 14 a and 14 b of the convex membrane 14 and a conduit 16 membrane rupture detection, known in itself as formed radially in the spacer 3 and equipped with a one-way valve 17.
  • the thick membrane has a stepped outer surface 18 which corresponds to the stepping of the inner surface 19 of the spacer 3.
  • This stepping constitutes a polarizing means which prevents the membrane 14 from being put in place with its concavity turned on the wrong side.
  • the thickness E of the membrane 14 is slightly greater (by a few hundredths of a millimeter) than the thickness e of the spacer 3.
  • the nip of the composite membrane, between the two parts 1 and 2 of the pump body is of a dimension L sufficiently large that the clamping force of the two parts 1 and 2, applied by tie rods assembly not shown known in themselves, on the spacer 3, by means of the metal membranes 12 and 13 is also exerted, through these membranes, on the periphery of the thick membrane 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP91403386A 1990-12-18 1991-12-13 Pompe à membrane à commande hydraulique pour pressions élevées Expired - Lifetime EP0493175B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9015831 1990-12-18
FR9015831A FR2670537B1 (fr) 1990-12-18 1990-12-18 Pompe a membrane a commande hydraulique pour pressions elevees.

Publications (2)

Publication Number Publication Date
EP0493175A1 EP0493175A1 (fr) 1992-07-01
EP0493175B1 true EP0493175B1 (fr) 1995-03-08

Family

ID=9403347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91403386A Expired - Lifetime EP0493175B1 (fr) 1990-12-18 1991-12-13 Pompe à membrane à commande hydraulique pour pressions élevées

Country Status (6)

Country Link
US (1) US5244360A (es)
EP (1) EP0493175B1 (es)
CA (1) CA2057803A1 (es)
DE (1) DE69107990T2 (es)
ES (1) ES2070466T3 (es)
FR (1) FR2670537B1 (es)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH062664A (ja) * 1992-06-22 1994-01-11 Nippon Soken Inc ダイアフラム式ポンプ
JPH06173811A (ja) * 1992-10-08 1994-06-21 Nippon Soken Inc 燃料噴射装置
JPH08285125A (ja) * 1995-04-12 1996-11-01 Koganei Corp 弁装置および弁装置を有する薬液供給装置
US5883299A (en) * 1996-06-28 1999-03-16 Texaco Inc System for monitoring diaphragm pump failure
FR2766524B1 (fr) * 1997-07-28 1999-10-22 Clextral Membrane elastique pour une pompe a membrane
US6790014B2 (en) * 2002-11-06 2004-09-14 John C. Bowen Fluid cooled diaphragms for diaphragm compressors
US8454324B2 (en) * 2004-03-18 2013-06-04 Precision Dispensing Systems Limited Pump
FR2934332B1 (fr) * 2008-07-28 2011-07-29 Milton Roy Europe Pompe de dosage a membrane et a commande hydraulique
EP2457644B1 (en) 2010-11-25 2015-09-09 Milton Roy Mixing Method for automatic elimination of fibers on the impeller of a mixer in wastewater treatment process
FR2985791B1 (fr) * 2012-01-17 2014-03-07 Milton Roy Europe Dispositif de detection de rupture d'une membrane d'une pompe a actionnement hydraulique, procede de montage d'un tel dispositif sur une pompe, et pompe equipee d'un tel dispositif
FR3021713B1 (fr) 2014-05-27 2019-04-05 Milton Roy Europe Pompe a membrane a commande hydraulique comprenant un chemin de degazage dedie
EP3218604A4 (en) * 2014-11-14 2018-06-13 Checkpoint Fluidic Systems International, Ltd. Metallic sandwich diaphragm pump mechanism
WO2017125349A1 (en) * 2016-01-21 2017-07-27 Tetra Laval Holdings & Finance S.A. Membrane pump with leakage detection
US11555487B2 (en) * 2019-02-22 2023-01-17 Haskel International, Llc Capacitive liquid leak detection device

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB305235A (en) * 1928-02-02 1930-05-01 Tecalemit Ltd Means for operating a flexible diaphragm more particularly adapted for diaphragm pumps
FR992556A (fr) * 1944-07-05 1951-10-19 Impressions Sur Materiaux Epai Pulsomètre électrique
US2689586A (en) * 1949-08-01 1954-09-21 Anderson Neville Rupert Diaphragm
US3131638A (en) * 1962-07-05 1964-05-05 Lapp Insulator Company Inc Leak detecting device
FR1373780A (fr) * 1963-08-19 1964-10-02 Perfectionnements aux pompes à diaphragme
US3566750A (en) * 1969-03-10 1971-03-02 Foxboro Co Differential pressure cell with keystone structure
US3563138A (en) * 1969-06-23 1971-02-16 Sybron Corp Differential pressure responsive device with diaphragm equalization
US3722373A (en) * 1969-06-23 1973-03-27 Sybron Corp Differential pressure responsive device of welded construction
FR2180213A5 (es) * 1972-04-13 1973-11-23 Duriron Co
SU506224A1 (ru) * 1973-06-18 1982-09-30 Государственный научно-исследовательский институт теплоэнергетического приборостроения Измерительный преобразователь разности давлений
SE411791B (sv) * 1977-05-20 1980-02-04 Alfa Laval Ab Reglerventil innefattande en membranvegg och en vid membranveggens centrala del fest ventilkropp
FR2533636B1 (fr) * 1982-09-28 1987-03-20 Milton Roy Dosapro Dispositif de detection de rupture de membrane
FR2557928B1 (fr) * 1984-01-11 1988-04-22 Milton Roy Dosapro Perfectionnement aux pompes a membrane a debit variable.
SU1211453A1 (ru) * 1984-04-19 1986-02-15 Предприятие П/Я Г-4150 Мембранный компрессор
US5145331A (en) * 1991-07-29 1992-09-08 J. Wagner Gmbh Diaphragm pump

Also Published As

Publication number Publication date
ES2070466T3 (es) 1995-06-01
DE69107990T2 (de) 1995-08-24
FR2670537A1 (fr) 1992-06-19
EP0493175A1 (fr) 1992-07-01
FR2670537B1 (fr) 1994-10-28
DE69107990D1 (de) 1995-04-13
CA2057803A1 (fr) 1992-06-19
US5244360A (en) 1993-09-14

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