EP1205663B1 - Doppelt wirkendes Pumpenventil - Google Patents

Doppelt wirkendes Pumpenventil Download PDF

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Publication number
EP1205663B1
EP1205663B1 EP01126094A EP01126094A EP1205663B1 EP 1205663 B1 EP1205663 B1 EP 1205663B1 EP 01126094 A EP01126094 A EP 01126094A EP 01126094 A EP01126094 A EP 01126094A EP 1205663 B1 EP1205663 B1 EP 1205663B1
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EP
European Patent Office
Prior art keywords
valve
piston
pump according
pump
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
EP01126094A
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English (en)
French (fr)
Other versions
EP1205663A1 (de
Inventor
Davide Miotti
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.)
Ceme Engineering SpA
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Ceme Engineering SpA
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Filing date
Publication date
Application filed by Ceme Engineering SpA filed Critical Ceme Engineering SpA
Publication of EP1205663A1 publication Critical patent/EP1205663A1/de
Application granted granted Critical
Publication of EP1205663B1 publication Critical patent/EP1205663B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor

Definitions

  • the present invention relates to pump with a double-effect valve.
  • the present invention relates to a pump with a double-effect valve, especially of the vibration type, i.e. an oscillating piston hydraulic electromagnetic pump.
  • Such types of pumps are utilized for handling fluids, typically water, and are applied, for instance, in white goods, such as irons and electric coffee machines, or in irrigation plants and in the motor car sector, etc.
  • oscillating piston pumps are provided with means for the interception of the fed fluid, located in correspondence of the suction and delivery ducts.
  • Such interception means are constituted of two like valves, so conformed as to intercept in alternation the orifices of said ducts. Examples of such pumps are shown in US-A-4 749 343, FR-A-1 555 291 and US-A-4 778 357.
  • Both valves used for the aforesaid pumps are generally elastically tensioned by a spring, so that it would be theoretically possible to utilize oversized elastic means to solve the problem, especially with regard to the valve that seals the suction duct.
  • Object of the present invention is to obviate the aforesaid drawback.
  • object of the present invention is to provide a pump with a double-effect valve, especially, however not critically, of the vibration type, suitable to ensure the actual interception of the work fluid in any conditions, i.e., also if said pump is not electrically fed, in the absence of balance of the pressure of the suction and delivery fluid veins, and also in the presence of temporary abnormal mains pressures.
  • a further object of the present invention is to provide a pump with a double-effect valve, suitable to prevent the use of oversized elastic means for the tensioning of said valve, and therefore such as to allow the utilization of a compact bobbin, with a limited energy consumption.
  • a further object of the present invention is to provide a pump with a double-effect valve that allows to substantially limit its overall dimensions and the related costs.
  • Still a further object of the present invention is to provide a pump with a double-effect valve that ensures a high level of resistance and reliability in the time, and also such as to be easily and economically realizable.
  • the pump with the double-effect valve of the present invention indicated as a whole by 10 and, by ways of example, of the vibration type, comprises: a container 12, circumscribed by a bobbin 14 with the related magnetic bushings 16 and the spacer 18, and a fluid delivery plunger or piston 20 sliding in said container 12, cooperating with a first valve 22 and a second valve 24, opposed to each other and spaced out by a spacer 26.
  • the first valve 22 of a known type, is located between said spacer 26 and the hollow front body 28 of valve 10, forming the fluid delivery means.
  • Said first valve 22 is elastically supported by a helical spring 30.
  • a sealing gasket is advantageously located, constituted, for instance, by an anchor ring 32.
  • the second valve 24, located upstream of the first one along the suction duct, is constituted of a body, circular by way of example, with a pointed front profile.
  • said second valve 24 expands forming two adjoining sectors 24', 24", having different and progressively increasing diameters.
  • Said second valve 24 is advantageously housed in correspondence of the upper end of piston 20, formed by a hollow cylindrical body from ferromagnetic material.
  • the pointed front end of the second valve 24 abuts at least partly in the upper mouth of said piston 20 and engages with a return spring 34, hooked with known means in said piston in correspondence of its lower part.
  • the central-rear expanded zone of the second valve 24 is formed by said differentiated diameter sectors 24', 24".
  • Sector 24" having a greater diameter is intended for engaging with the upper mouth of plunger or piston 20 and with the base of spacer 26, and forms a movable lid suitable to circumscribe in the upper part container 12.
  • Spacer 26 from metal or other suitable material, is constituted of a circular plan core provided with an axial hole 36 that has, in the upper part, a greater diameter, and forms a plate 38.
  • a lowering 40 is obtained, aligned with hole 36, that defines the striking sealing seat of the first valve 22, which can be of any known type, but which is preferably mushroom-shaped.
  • Said first valve 22, supported by spring 30, is located in the hollow front body 28 of pump 10.
  • the lower front of spacer or lid 26 has, in a central position and on line with lowering 40, a shaped recessing 42, suitable to house the second valve 24 and, in particular, sector 24" with a greater diameter of the same.
  • Said sector 24" has a disc-like configuration, with a diameter preferably slightly shorter than the external diameter of plunger or piston 20, and connects with the front part of the valve through the integral sector 24' that has a substantially truncated conic conformation.
  • the intermediate sector 24' does not expand until it reaches the edge of sector 24", so that the lower front of the latter defines peripherally a circular crown suitable to strike the upper mouth of piston 20.
  • the circular plan shaped recessing 42 has a diameter greater than that of sector 24" of the second valve 24.
  • the base of said recessing 42 obtained in spacer 26, indicated by 44 in Figure 2, is markedly convex.
  • a further spring 46 is located that strikes the base of piston 20 on a side and the internal front of the suckion duct 48 of valve 10 on the opposite side.
  • plunger or piston 20 shifts axially to a limited extent, in order to allow the passage of the fluid coming from the suction duct 48.
  • Said piston in particular, shifts from a first end position, the one shown in Figures 1 and 2, to a second and slightly receded position it takes on overcoming the resistance of spring 46 following the impulse determined by bobbin 14.
  • the slight compression of spring 46 allows the passage of the fluid into pump 10, with a known method.
  • the directly following step that repeats at each cycle due to bobbin 14, determines the return to the original position of plunger or piston 20 and the simultaneous opening of the first valve 22 under the effect of the pressure of the fluid present in hole 36 flowing into recessing 40.
  • spring 30 of the first valve 22 is slightly compressed.
  • the second valve 24 ensures the complete interception of the fluid, preventing an undesired blow-by that might take place if the fluid vein, upon suction, i.e., starting from duct 48, should have a pressure higher than that of the opposed vein, upon delivery.
  • Said valve in fact, advantageously realizes a double sealing effect, the first of which is determined by the convex base 44 of recessing 42, that compresses from above plate 38 of said valve. The further effect of sealing or interception of the fluid is obtained on the opposite front of said plate, along the circular crown that strikes the upper mouth of plunger or piston 20.
  • the second valve 24 ensures the actual interception of the fluid in any situation, also in the absence of electric feeding or in the presence of an abnormal mains pressure. Besides, the particular conformation of said second valve avoids the necessity of having recourse to oversized springs or elastic means to tension plunger or piston 20, with the advantageous result of having the possibility of utilizing a limited energy consumption bobbin and to contain markedly the overall dimensions of pump 10.
  • the first valve 22 can have, with the suitable sizing of hole 36, a configuration similar or identical to that of the second valve 24, with the addition of a possible convex pressing means located in correspondence of its upper front and interacting with spring 30.
  • the sliding seat of piston 20 obtained in body 12 and/or the lateral surface of said piston may be submitted to an anti-adhesion surface treatment, for instance, nickel- and teflon-based, to avoid any possible abnormal friction and to prevent the formation of eddy currents in the inside of pump 10, caused by the different electrochemical potential existing between said pump and said piston.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)

Claims (10)

  1. Pumpe (10) mit doppelt wirkendem Ventil, insbesondere eine Pumpe des Schwingungstyps mit einem oszillierenden Schieber oder Kolben (20) aus ferromagnetischem Material, welcher in einem Behälterrumpf (12) angeordnet ist, der durch eine Spule (14) mit der zugehörigen magnetischen Buchse (16) und Abstandstück (18) umschlossen ist, und der mit einem ersten Ventil (22), welches entlang der in dem hohlen vorderen Rumpf (28) ausgebildeten Lieferführung anliegt, und mit einem zweiten Ventil (24), welches entlang der Saugführung (48) angeordnet ist, zusammenarbeitet, dadurch gekennzeichnet, dass das erste (22) und das zweite Ventil (24) durch ein bewegliches Abstandstück oder einen beweglichen Deckel (26) beabstandet verteilt sind, und dass das zweite Ventil (24) an der Oberseite an das bewegliche Abstandstück oder den beweglichen Deckel (26), und an der Unterseite an die obere Mündungsöffnung des oszillierenden Schiebers oder Kolbens (20) stößt.
  2. Pumpe gemäß Anspruch 1, dadurch gekennzeichnet, dass die ersten und zweiten Ventile (22, 24) mit einem Durchgangsloch (36) für den Durchtritt von Fluid ausgerichtet sind, welche in dem mobilen Abstandstück oder Deckel (26) ausgebildet sind, an deren gegenüberliegenden Enden Sitze (40, 42) für das Positionieren und/oder Anstoßen der Ventile ausgebildet sind.
  3. Pumpe gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass das zweite Ventil (24) aus einem kreisförmigen flachen Körper mit einem zugespitzten vorderen Ende und einem aufgeweiteten, mittig hinteren Teil gebildet ist, um zwei aneinander angrenzende Sektoren (24', 24") auszubilden, welche einen zunehmend ansteigenden Durchmesser aufweisen, wobei das vordere Ende des Ventils (24) zumindest teilweise in der oberen Mundöffnung des Kolbens (20) anliegt und mit einer Feder (34) im Eingriff steht, welche in den Kolben eingehakt ist.
  4. Pumpe gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die untere Front des beweglichen Abstandstücks oder Deckels (26) in der Mitte eine geformte Ausnehmung aufweist, welche den Sitz (42) ausbildet, in welchem der Sektor (24") größeren Durchmessers des zweiten Ventils (24) anliegt, wobei der Sektor einen scheibenförmigen Aufbau aufweist.
  5. Pumpe gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Basis des geformten Sitzes oder der geformten Ausnehmung (42) durch eine konvexe Oberfläche (44) begrenzt ist, welche an die obere Front des Sektors (24") des zweiten Ventils (24) anstößt.
  6. Pumpe gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das zweite Ventil (24) auf der unteren Front gegenüber der einen, welche durch die konvexe Oberfläche (44) der geformten Ausnehmung (42) gestoßen wird, eine ringförmige Krone aufweist, welche an die obere Mundöffnung des Kolbens (20) stößt.
  7. Pumpe gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie in Ausrichtung mit der in dem Kolben (20) angeordneten Feder (34) eine weitere Feder (46) aufweist, welche in dem unteren Teil des Rumpfes (12) angeordnet ist und mit dem oszillierenden Schieber oder Kolben (20) zusammenarbeitet.
  8. Pumpe gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das zweite Ventil (22) pilzförmig ist und elastisch in der Lieferführung (28) durch eine Feder (30) gestützt wird. Der vordere Teil des ersten Ventils stößt an den in der oberen Front des Abstandstücks (26) ausgebildeten Sitz (40).
  9. Pumpe gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen dem beweglichen Abstandstück oder Deckel (26) und dem vorderen hohlen Rumpf (28) eine dichtende Dichtung oder ein Kreisring (32) angeordnet ist.
  10. Pumpe gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Gleitsitz des oszillierenden Schiebers oder Kolbens (20) und/oder der oszillierende Schieber oder Kolben eine Anti-Adhäsionsoberfläche aufweist.
EP01126094A 2000-11-10 2001-11-02 Doppelt wirkendes Pumpenventil Expired - Lifetime EP1205663B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000MI000637U IT249882Y1 (it) 2000-11-10 2000-11-10 Pompa con valvola a doppio effetto
ITMI000637U 2000-11-10

Publications (2)

Publication Number Publication Date
EP1205663A1 EP1205663A1 (de) 2002-05-15
EP1205663B1 true EP1205663B1 (de) 2005-05-04

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Family Applications (1)

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EP01126094A Expired - Lifetime EP1205663B1 (de) 2000-11-10 2001-11-02 Doppelt wirkendes Pumpenventil

Country Status (4)

Country Link
EP (1) EP1205663B1 (de)
AT (1) ATE294926T1 (de)
DE (1) DE60110524T2 (de)
IT (1) IT249882Y1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10368687B2 (en) 2014-03-19 2019-08-06 Luigi Lavazza S.P.A. Machine for preparing liquid products, in particular via capsules
US10376093B2 (en) 2014-03-19 2019-08-13 Luigi Lavazza S.P.A. Machine for preparing liquid products, in particular via capsules

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20020271U1 (it) * 2002-05-23 2003-11-24 C E M E Engineering S P A Elettropompa migliorata
ITTO20030400A1 (it) * 2003-05-30 2004-11-30 Buzzi Srl Micropompa elettromagnetica alternativa, particolarmente
EP1607629B1 (de) * 2004-06-11 2007-08-29 Olab S.r.l. Schwingankerpumpe
DE102007007297A1 (de) 2007-02-14 2008-08-21 Saia-Burgess Dresden Gmbh Schwingkolbenpumpe
DE202007019534U1 (de) 2007-02-14 2013-06-26 Johnson Electric Dresden Gmbh Schwingkolbenpumpe
ATE499527T1 (de) * 2007-03-15 2011-03-15 Ceme Spa Hydraulisch-elektromagnetische motorpumpe mit schwimmkolben
ITMI20120078A1 (it) * 2012-01-25 2013-07-26 Olab Srl Raccordo di uscita particolarmente per pompe a vibrazione.
ITGE20120097A1 (it) * 2012-09-25 2014-03-26 A R S Elettromeccanica Srl Pompa a vibrazione
EP2873857B1 (de) * 2013-11-15 2020-08-19 ODE (Hk) Company Limited Flüssigkeitspumpe
IT201800003064A1 (it) * 2018-02-27 2019-08-27 Elbi Int Spa Pompa a vibrazione con struttura migliorata.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1653426A1 (de) * 1967-03-01 1971-09-02 Otto Eckerle Elektromagnetische Schwingankerpumpe
US3592565A (en) * 1968-12-05 1971-07-13 Eberspaecher J Armature pump
JPH0441260Y2 (de) * 1984-10-15 1992-09-28
US4749343A (en) * 1986-08-08 1988-06-07 Facet Enterprises, Inc. High pressure fluid pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10368687B2 (en) 2014-03-19 2019-08-06 Luigi Lavazza S.P.A. Machine for preparing liquid products, in particular via capsules
US10376093B2 (en) 2014-03-19 2019-08-13 Luigi Lavazza S.P.A. Machine for preparing liquid products, in particular via capsules

Also Published As

Publication number Publication date
ITMI20000637U1 (it) 2002-05-10
EP1205663A1 (de) 2002-05-15
ATE294926T1 (de) 2005-05-15
DE60110524D1 (de) 2005-06-09
IT249882Y1 (it) 2003-06-05
DE60110524T2 (de) 2006-02-23

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