EP1801417A1 - Diaphragmapumpe mit hydraulischer Betätigung und Vorrichtung zum Ausgleich der entweichenden Luft - Google Patents

Diaphragmapumpe mit hydraulischer Betätigung und Vorrichtung zum Ausgleich der entweichenden Luft Download PDF

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Publication number
EP1801417A1
EP1801417A1 EP06291841A EP06291841A EP1801417A1 EP 1801417 A1 EP1801417 A1 EP 1801417A1 EP 06291841 A EP06291841 A EP 06291841A EP 06291841 A EP06291841 A EP 06291841A EP 1801417 A1 EP1801417 A1 EP 1801417A1
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EP
European Patent Office
Prior art keywords
diaphragm
shutter
membrane
valve
chamber
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
EP06291841A
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English (en)
French (fr)
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EP1801417B1 (de
Inventor
Gaëtan Spude
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.)
Milton Roy Europe SA
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Milton Roy Europe SA
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Filing date
Publication date
Application filed by Milton Roy Europe SA filed Critical Milton Roy Europe SA
Publication of EP1801417A1 publication Critical patent/EP1801417A1/de
Application granted granted Critical
Publication of EP1801417B1 publication Critical patent/EP1801417B1/de
Not-in-force 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
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
    • 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

Definitions

  • the present invention relates to a hydraulically actuated diaphragm pump with membrane protection in case of hydraulic leaks in the actuating chamber.
  • Overtravel suction is due to a deficit of liquid in the hydraulic chamber actuating the membrane. In reality, in certain types of pumps, this overtravel does not occur because the membrane at the end of suction is supported on a limiting surface of the stroke. It can then occur cavitations in the hydraulic chamber, and, in any case, the displacement of the pump is affected downward. In some pumps where there are no mechanical limitations to the suction stroke of the diaphragm, overtravel, in addition to the weakening of performance, can result in excessive membrane deformation and fatigue to longevity .
  • the document FR 2,557,928 includes means for compensating leaks that are automatic given the very principle of operation of the pump. This system is also subject to overcompensation.
  • a valve interrupts the communication between two parts of the hydraulic chamber thus isolating the fluid in contact with the membrane of the fluid in contact with the piston when the membrane has reached a set position at the end of discharge.
  • the excess operating fluid is then diverted to a tarpaulin through a relief valve.
  • a valve opens at the moment when the membrane reaches a set position suction end. This opening communicates the hydraulic chamber with an oil tank by a feedback line and a complementary movement of the piston causes the suction of a volume of compensation oil in the hydraulic chamber.
  • the membrane With regard to the diaphragm controlled or controlled compensation valve, it is necessary to change its state, that the membrane develops a force intended to overcome the opposite force of a spring which maintains the valve in its state shutter feedback line. This effort to overcome limits the suction height of the pump. In other words, in the case of operation of the pump with vacuum at the suction, it may occur a non-operation of the compensation device, a cavitation then taking place in the hydraulic actuating chamber without the opening of the valve can intervene. It is understood that there is great interest in reducing the force of the return spring of the valve on its seat to not penalize too much the operation of the pump suction. But it is hardly possible to reduce this force below a value corresponding to a pressure of 0.3 bars (3 meters of water column or 300 hectopascals).
  • Diaphragm pumps equipped with a membrane-controlled leak compensation system therefore have poor suction power.
  • the present invention relates to a pump in which the compensation of leakage of the hydraulic chamber is controlled and the suction power significantly improved.
  • the invention therefore relates to a diaphragm pump comprising, in a body, a hydraulic control chamber disposed between a reciprocating piston and the diaphragm, the pump comprising means for compensating for leaks in the hydraulic chamber with a feedthrough opening into the hydraulic chamber through a compensation shutter controlled at the opening by the membrane.
  • the aforementioned compensation shutter is operated by pressing the membrane on a free end of a rod of its control while the membrane is subjected the force of a suction assist spring which cooperates with the aforementioned shutter to return it to its closed state by pushing the free end of the rod towards the diaphragm, this spring forming with the shutter a moving equipment moved without being deformed by the membrane during a suction overtravel.
  • the suction assistance spring is supported, opposite the shutter, on a shoulder located at the end of a rod integral with the membrane and extending from it in the hydraulic chamber of the pump.
  • This particular arrangement has the advantage of freeing the opening of the compensation shutter of any effort that is necessary to maintain it in its closed state. This increases the suction height which becomes close to ten meters of water column against seven meters usually. The shutter and the shoulder move along a direction which is that of the deflection of the membrane.
  • the holding force of the compensation shutter in its closed state varies according to the greater or lesser compression of the spring since there is a relative movement between the bearing shoulder of the spring and the spring. shutter compensation.
  • the compensation shutter namely, a realization in the form of a drawer and a valve-shaped embodiment.
  • the support shoulder of the spring secured to the membrane may serve as limiting the discharge stroke of the membrane, either in the form of a stop or in the form of an isolation valve of a part of the control chamber adjacent to the membrane of the other part of this adjacent chamber of the piston and provided with a relief valve.
  • a hydraulically operated diaphragm pump is composed of a two-part pump body 1 and 2, between which a diaphragm 3 is clamped at the periphery.
  • the membrane delimits a pumping chamber 4 to which end a suction pipe 5, a discharge pipe 6 equipped unidirectional valves not shown.
  • this membrane delimits a chamber 7 filled with a hydraulic fluid that can be cyclically displaced forward (to the left of the figure) or to the rear by means of a piston 8 moved with a reciprocating motion. This provides a hydraulic control of the variation of the volume of the chamber 4 pumping.
  • This chamber 7 is also equipped in known manner, a relief valve 9 which limits the discharge pressure to a determined safety value and which is often combined with a device for degassing the control fluid.
  • the chamber 7 has two parts. Part 7 has generally cylindrical side of the piston 8, and a portion 7 b tapering toward the membrane 3. The portions 7 and 7b are connected, through a septum 2a, by a connecting conduit 10.
  • a refilling duct 14 is formed in the body 2 (the partition 2 a) and is from an oil tank 14 a comprising a non-return valve 14b. This duct 14 opens into the chamber 7 when this outlet is discovered by a closure member 15 which normally isolates the duct 14 from this chamber 7.
  • the closure member 15 herein is a valve equipped with a tubular actuating rod 16, sealingly slidably mounted in the wall 2a of the part 2 of the body and whose end 16a, opposite to the valve 15 is adjacent to the membrane 3, when it reaches close to a setpoint position reached at the end of the suction stroke.
  • the valve 15 closes, by resting on the wall 2a, the opening of an annular channel 17 formed at least partially around the valve stem 16 and into which the end of the conduit 14 opens out.
  • the valve stem 16 forms a sleeve in which slides a rod 12 integral with the membrane 3.
  • This rod 12 is equipped at its free end with a shoulder 11 (here bell-shaped) to form a support for a spring 13 for assisting the suction of the membrane 3 and whose other end rests on the valve 15 tending to press against the wall 2a.
  • the valve 15 closes and it is necessary to overcome the force of the spring 13 before moving the membrane 3 forward. There then reigns in the chamber 7 a pressure always greater than that prevailing in the pumping chamber 4, which is rather favorable to the proper functioning of the pump (less degassing of dissolved gases for example).
  • the shoulder 11 may limit the stroke of the membrane 3 by pressing on the valve 15 or on the wall 2a.
  • the shoulder 11 is bell-shaped 11a which forms a valve capable of closing the outlet of the channel 10 in Part 7 is of the hydraulic chamber and which insulates the part 7B of the portion 7a when the membrane 3 exceeds a discharge end in set position.
  • This part 7a is in permanent communication with the discharge valve 9, so that a further stroke of the piston 8, whereas the discharge end position is reached by the membrane 3, lead to derive excess fluid through the discharge valve 9 to a tarpaulin of oil.
  • the shutter member 15 is constituted by a drawer 18 slidably mounted in a bore of the partition wall 2 a of the body 2 of the pump.
  • the drawer 18 is tubular with a collar 19 at its end opposite to the membrane, on which the spring 13 applies relying otherwise under the shoulder 11 (valve 11a) and tending to press the collar 19 against the wall 2a of the body 2 which is crossed by the connecting conduit 10.
  • the drawer 18 is stepped outer diameter so that a portion 18a of larger diameter covers the opening of the conduit 14 into the bore when the collar 19 is support on the partition 2 a .
  • the portion 18 b of smaller diameter of the spool 18 discovers the opening of the conduit 14 and the chamber 7 can be replenished by suction.
  • the drawer 18 forms a sleeve in which the rod 12 of the valve 11 a or the shoulder 11.
  • the end 18 c opposite to the collar 19 is located near the target position reached by the membrane 3 in the end position suction.
  • part 2 of the pump body constitutes the enclosure of the hydraulic chamber 7.
  • This enclosure belongs to a general frame 20 which also forms a support for a drive motor 21 and a housing for a mechanism transmission of the motor 21 to the piston 8, which mechanism is not shown and which generally consists of a wheel and worm gear system, the wheel being equipped with an alternating drive eccentric piston.
  • This housing also contains a lubricating oil bath 22 of the transmission mechanism.
  • the casing 20 communicates with the cover 14 a of the part 2 of the pump body via a filter 23.
  • the fluid is withdrawn from the cover 14a which consequently is completed by lubricating oil drawn from the filter 23 itself from the bath 22 in the housing 20. It will be noted in this figure that the fluid of the chamber 7 derived by the relief valve 9 returns to the casing 20 in the bath 22.
  • the pumps of the prior art implementing a diaphragm controlled compensation valve all have a separate fluid for the hydraulic control chamber, to ensure purity while a lubricating fluid is loaded. progressively particles from lubricated parts in motion. To be able to maintain an acceptable suction height, the calibrated valve must be tared to a minimum, which means that very little effort is required to obtain displacements. These forces may be less than those necessary to overcome unwanted friction forces generated by any particles that would block the valve.
  • the means of the invention have overcome the return spring of the valve and its force for compensation: this allowed to admit a less purified fluid.
EP06291841A 2005-12-20 2006-11-30 Diaphragmapumpe mit hydraulischer Betätigung und Vorrichtung zum Ausgleich der entweichenden Luft Not-in-force EP1801417B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0512938A FR2895036B1 (fr) 2005-12-20 2005-12-20 Pompe a membrane a actionnement hydraulique avec dispositif de compensation des fuites

Publications (2)

Publication Number Publication Date
EP1801417A1 true EP1801417A1 (de) 2007-06-27
EP1801417B1 EP1801417B1 (de) 2009-01-07

Family

ID=36808748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06291841A Not-in-force EP1801417B1 (de) 2005-12-20 2006-11-30 Diaphragmapumpe mit hydraulischer Betätigung und Vorrichtung zum Ausgleich der entweichenden Luft

Country Status (9)

Country Link
US (1) US7654801B2 (de)
EP (1) EP1801417B1 (de)
JP (1) JP4571614B2 (de)
AT (1) ATE420290T1 (de)
CA (1) CA2571024C (de)
DE (1) DE602006004692D1 (de)
ES (1) ES2320377T3 (de)
FR (1) FR2895036B1 (de)
PT (1) PT1801417E (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2985791A1 (fr) * 2012-01-17 2013-07-19 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

Families Citing this family (21)

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Publication number Priority date Publication date Assignee Title
EP2058517B1 (de) 2007-11-07 2010-09-08 Idromeccanica Bertolini S.p.A. Pumpe
KR101694596B1 (ko) 2008-10-22 2017-01-09 그라코 미네소타 인크. 휴대용 에어리스 스프레이어
TW201024526A (en) * 2008-12-23 2010-07-01 Cheng-Chin Kung Cooling and circulating system for engine oil
WO2012015929A1 (en) * 2010-07-27 2012-02-02 Delaware Capital Formation, Inc. Energy efficient variable displacement dosing pump
DE102010039831B4 (de) * 2010-08-26 2022-02-03 Prominent Gmbh Membranpumpe sowie Verfahren zum Einstellen einer solchen
US20150204320A1 (en) * 2012-09-04 2015-07-23 Hove A/S Diaphragm pump
ITRE20130083A1 (it) * 2013-11-08 2015-05-09 Imovilli Pompe S R L Pompa volumetrica alternativa a membrana per liquidi
AU2014381624B2 (en) 2014-02-07 2019-01-17 Graco Minnesota Inc. Pulseless positive displacement pump and method of pulselessly displacing fluid
DE102014109801A1 (de) * 2014-07-11 2016-01-14 Prominent Gmbh Membranpumpe mit reduzierter Leckageergänzung im Überlastfall
US9964106B2 (en) * 2014-11-04 2018-05-08 Wanner Engineering, Inc. Diaphragm pump with dual spring overfill limiter
GB201601194D0 (en) * 2016-01-22 2016-03-09 Carlisle Fluid Tech Inc Active surge chamber
JP6660239B2 (ja) * 2016-04-22 2020-03-11 応研精工株式会社 ダイヤフラムポンプ
US11007545B2 (en) 2017-01-15 2021-05-18 Graco Minnesota Inc. Handheld airless paint sprayer repair
US11022106B2 (en) 2018-01-09 2021-06-01 Graco Minnesota Inc. High-pressure positive displacement plunger pump
US20220234062A1 (en) 2019-05-31 2022-07-28 Graco Minnesota Inc. Handheld fluid sprayer
DE102019128059A1 (de) * 2019-10-17 2021-04-22 Prominent Gmbh Hydraulisch angetriebene membranpumpe mit einem magnetisch gekoppelten membranpaket
CN115362316A (zh) 2020-03-31 2022-11-18 固瑞克明尼苏达有限公司 电动操作的往复式泵
US10968903B1 (en) 2020-06-04 2021-04-06 Graco Minnesota Inc. Handheld sanitary fluid sprayer having resilient polymer pump cylinder
US10926275B1 (en) 2020-06-25 2021-02-23 Graco Minnesota Inc. Electrostatic handheld sprayer
CN112972808B (zh) * 2021-03-01 2022-08-02 深圳市成为高科技有限公司 一种急诊科室用智能自动胃清洗设备
CN113279953B (zh) * 2021-05-26 2022-05-10 重庆水泵厂有限责任公司 一种隔膜泵排油阀结构及含该结构的隔膜泵

Citations (4)

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Publication number Priority date Publication date Assignee Title
FR2557928A1 (fr) 1984-01-11 1985-07-12 Milton Roy Dosapro Perfectionnement aux pompes a membrane a debit variable.
US4619589A (en) * 1984-08-21 1986-10-28 Alldos Eichler Kg Diaphragm pump, particularly for dosing liquids
EP0547404A1 (de) 1991-12-17 1993-06-23 LEWA Herbert Ott GmbH + Co. Hydraulisch angetriebene Membranpumpe mit Membranhubbegrenzung
US5707219A (en) 1995-10-04 1998-01-13 Wanner Engineering Diaphragm pump

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Publication number Priority date Publication date Assignee Title
FR2557928A1 (fr) 1984-01-11 1985-07-12 Milton Roy Dosapro Perfectionnement aux pompes a membrane a debit variable.
US4619589A (en) * 1984-08-21 1986-10-28 Alldos Eichler Kg Diaphragm pump, particularly for dosing liquids
EP0547404A1 (de) 1991-12-17 1993-06-23 LEWA Herbert Ott GmbH + Co. Hydraulisch angetriebene Membranpumpe mit Membranhubbegrenzung
US5246351A (en) * 1991-12-17 1993-09-21 Lews Herbert Ott Gmbh & Co. Hydraulically driven diaphragm pump with diaphragm stroke limitation
US5707219A (en) 1995-10-04 1998-01-13 Wanner Engineering Diaphragm pump

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2985791A1 (fr) * 2012-01-17 2013-07-19 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
EP2617997A1 (de) * 2012-01-17 2013-07-24 Milton Roy Europe Anzeigevorrichtung für den Membranbruch für hydraulisch angetriebene Pumpe
CN103216436A (zh) * 2012-01-17 2013-07-24 米尔顿罗伊欧洲公司 膜破裂检测装置及其在泵上的安装方法和配备该装置的泵
CN103216436B (zh) * 2012-01-17 2015-11-25 米尔顿罗伊欧洲公司 膜破裂检测装置及其在泵上的安装方法和配备该装置的泵
US9388802B2 (en) 2012-01-17 2016-07-12 Milton Roy Europe Device for detecting breakage of a diaphragm in a hydraulically-actuated pump, a method of mounting such a device on a pump, and a pump fitted with such a device

Also Published As

Publication number Publication date
ES2320377T3 (es) 2009-05-21
DE602006004692D1 (de) 2009-02-26
JP4571614B2 (ja) 2010-10-27
ATE420290T1 (de) 2009-01-15
JP2007170394A (ja) 2007-07-05
US7654801B2 (en) 2010-02-02
CA2571024A1 (fr) 2007-06-20
CA2571024C (fr) 2010-03-23
PT1801417E (pt) 2009-03-23
EP1801417B1 (de) 2009-01-07
FR2895036A1 (fr) 2007-06-22
US20070140878A1 (en) 2007-06-21
FR2895036B1 (fr) 2008-02-22

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