EP1205663A1 - Doppelt wirkendes Pumpenventil - Google Patents

Doppelt wirkendes Pumpenventil Download PDF

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Publication number
EP1205663A1
EP1205663A1 EP01126094A EP01126094A EP1205663A1 EP 1205663 A1 EP1205663 A1 EP 1205663A1 EP 01126094 A EP01126094 A EP 01126094A EP 01126094 A EP01126094 A EP 01126094A EP 1205663 A1 EP1205663 A1 EP 1205663A1
Authority
EP
European Patent Office
Prior art keywords
valve
piston
spacer
pump according
pump
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
EP01126094A
Other languages
English (en)
French (fr)
Other versions
EP1205663B1 (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
Original Assignee
Ceme Engineering SpA
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 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.
  • 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 especially an oscillating piston hydraulic electromagnetic pump from ferromagnetic material, included in a container circumscribed by a bobbin with the related bushings and the spacer, cooperating with a first valve located along the delivery duct obtained in the hollow front body and a second valve located along the suction duct and opposite with respect to the first one, wherein said first and said second valves are spaced out by a movable spacer or lid, and said second valve strikes on the upper part said spacer and the bottom part the upper mouth of the piston.
  • 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.

Landscapes

  • 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)
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 true EP1205663A1 (de) 2002-05-15
EP1205663B1 EP1205663B1 (de) 2005-05-04

Family

ID=11444641

Family Applications (1)

Application Number Title Priority Date Filing Date
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 (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1365149A2 (de) * 2002-05-23 2003-11-26 C.E.M.E. Engineering S.p.A. Hydraulische elektromagnetische Motorpumpeneinheit mit Freikolbentspanner
EP1482176A2 (de) * 2003-05-30 2004-12-01 BUZZI S.r.l. Elektromagnetische Mikro-Kolbenpumpe, insbesondere für kleine Elektrogeräte
EP1607629A1 (de) * 2004-06-11 2005-12-21 Olab S.r.l. Schwingankerpumpe
DE102007007297A1 (de) 2007-02-14 2008-08-21 Saia-Burgess Dresden Gmbh Schwingkolbenpumpe
WO2008110187A1 (en) 2007-03-15 2008-09-18 Ceme S.P.A. Hydraulic-electromagnetic motor pump with floating piston
DE202007019534U1 (de) 2007-02-14 2013-06-26 Johnson Electric Dresden Gmbh Schwingkolbenpumpe
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
EP2873857A1 (de) * 2013-11-15 2015-05-20 Defond Components Limited Flüssigkeitspumpe
WO2015140686A1 (en) 2014-03-19 2015-09-24 Luigi Lavazza S.P.A. Machine for preparing liquid products, in particular via capsules
WO2015140688A1 (en) 2014-03-19 2015-09-24 Luigi Lavazza S.P.A. Machine for preparing liquid products, in particular via capsules
IT201800003064A1 (it) * 2018-02-27 2019-08-27 Elbi Int Spa Pompa a vibrazione con struttura migliorata.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1555291A (de) * 1967-03-01 1969-01-24
US3592565A (en) * 1968-12-05 1971-07-13 Eberspaecher J Armature pump
US4749343A (en) * 1986-08-08 1988-06-07 Facet Enterprises, Inc. High pressure fluid pump
US4778357A (en) * 1984-10-15 1988-10-18 Jidosha Kiki Co., Ltd. Shut-off valve for an electromagnetic pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1555291A (de) * 1967-03-01 1969-01-24
US3592565A (en) * 1968-12-05 1971-07-13 Eberspaecher J Armature pump
US4778357A (en) * 1984-10-15 1988-10-18 Jidosha Kiki Co., Ltd. Shut-off valve for an electromagnetic pump
US4749343A (en) * 1986-08-08 1988-06-07 Facet Enterprises, Inc. High pressure fluid pump

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1365149A2 (de) * 2002-05-23 2003-11-26 C.E.M.E. Engineering S.p.A. Hydraulische elektromagnetische Motorpumpeneinheit mit Freikolbentspanner
EP1365149A3 (de) * 2002-05-23 2003-12-17 C.E.M.E. Engineering S.p.A. Hydraulische elektromagnetische Motorpumpeneinheit mit Freikolbentspanner
EP1482176A2 (de) * 2003-05-30 2004-12-01 BUZZI S.r.l. Elektromagnetische Mikro-Kolbenpumpe, insbesondere für kleine Elektrogeräte
EP1482176A3 (de) * 2003-05-30 2005-08-10 BUZZI S.r.l. Elektromagnetische Mikro-Kolbenpumpe, insbesondere für kleine Elektrogeräte
CN100335780C (zh) * 2003-05-30 2007-09-05 布齐股份有限公司 用于小型电气用具的微型往复式电磁泵
US7413415B2 (en) 2003-05-30 2008-08-19 Ceme S.P.A. Reciprocating electromagnetic micro-pump, particularly for small electrical appliances
EP1607629A1 (de) * 2004-06-11 2005-12-21 Olab S.r.l. Schwingankerpumpe
DE202007019534U1 (de) 2007-02-14 2013-06-26 Johnson Electric Dresden Gmbh Schwingkolbenpumpe
DE102007007297A1 (de) 2007-02-14 2008-08-21 Saia-Burgess Dresden Gmbh Schwingkolbenpumpe
WO2008110187A1 (en) 2007-03-15 2008-09-18 Ceme S.P.A. Hydraulic-electromagnetic motor pump with floating piston
CN101755123B (zh) * 2007-03-15 2012-10-31 Ceme控股公司 具有浮动活塞的液压电磁式电动泵
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
EP2711548A3 (de) * 2012-09-25 2014-04-02 ARS Elettromeccanica S.r.l. Schwingankerpumpe
EP2873857A1 (de) * 2013-11-15 2015-05-20 Defond Components Limited Flüssigkeitspumpe
CN104653448A (zh) * 2013-11-15 2015-05-27 东莞辰达电器有限公司 流体泵
WO2015140686A1 (en) 2014-03-19 2015-09-24 Luigi Lavazza S.P.A. Machine for preparing liquid products, in particular via capsules
WO2015140688A1 (en) 2014-03-19 2015-09-24 Luigi Lavazza S.P.A. Machine for preparing liquid products, in particular via capsules
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
IT201800003064A1 (it) * 2018-02-27 2019-08-27 Elbi Int Spa Pompa a vibrazione con struttura migliorata.
WO2019166954A1 (en) * 2018-02-27 2019-09-06 Elbi International S.P.A. Vibration pump

Also Published As

Publication number Publication date
ITMI20000637U1 (it) 2002-05-10
ATE294926T1 (de) 2005-05-15
IT249882Y1 (it) 2003-06-05
DE60110524D1 (de) 2005-06-09
DE60110524T2 (de) 2006-02-23
EP1205663B1 (de) 2005-05-04

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