EP3891394B1 - Pumpe zur ausmessung eines fluids - Google Patents

Pumpe zur ausmessung eines fluids Download PDF

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Publication number
EP3891394B1
EP3891394B1 EP18847225.2A EP18847225A EP3891394B1 EP 3891394 B1 EP3891394 B1 EP 3891394B1 EP 18847225 A EP18847225 A EP 18847225A EP 3891394 B1 EP3891394 B1 EP 3891394B1
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EP
European Patent Office
Prior art keywords
pumping chamber
fluid
piston
valve
pump
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EP18847225.2A
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English (en)
French (fr)
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EP3891394A1 (de
Inventor
Andrea ZANCANELLA
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Ceme SpA
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Ceme SpA
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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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • 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
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • 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
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • F04B17/044—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow using solenoids directly actuating the 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
    • 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
    • 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
    • F04B17/048—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing around the moving part of the motor

Definitions

  • the present invention relates to the field of systems for mixing exhaust gas with reagents, for example for reducing the emissions of substances which are harmful for the environment and for the health of people, and in particular the present invention relates to a pump for measuring out a fluid. It is known that exhaust gases of internal combustion engines contain a high quantity of harmful elements that can damage both the environment and the health of people who may breathe the polluted air.
  • a class of compounds contained in the exhaust gases which are particularly dangerous for the environment and for people is that of the NOx compounds, i.e. nitrogen oxides and their mixtures.
  • SCR Selective Catalytic Reduction
  • a reducing chemical is added, in the liquid or gaseous state, to the exhaust gases in the presence of a catalyst.
  • the reducing element in particular it is known the use of mixtures of water and urea, tends to bind with oxygen, thus preventing the production of NOx within the exhaust gas, thus favouring the emission of nitrogen (N2).
  • this type of systems requires a very high precision while measuring out the reducing chemical, since the introduction into the exhaust gas of a too low quantity of reducing element would cause a reduction in the efficiency of the system and the incorrect elimination of pollutants.
  • the same effect would be to introduce an excessively high quantity of reducing element which would settle on the catalyst, thus decreasing the surface useful for the catalysis reaction, yet risking damaging the catalyst itself at a structural level.
  • the technical task underlying the present invention is to propose a pump for measuring out a fluid that overcomes at least some of the drawbacks of the known art mentioned above.
  • a pump for measuring out a fluid comprising: a first pumping chamber having an inlet opening suitable for being placed in fluid communication with a feeding device and an outlet opening; a second pumping chamber having an outlet opening, suitable for being placed in fluid communication with a using device and an inlet opening; a transfer valve, interposed between the outlet opening of the first pumping chamber and the inlet opening of the second pumping chamber, which is movable between an opened configuration and a closed configuration for permitting or preventing the flow of a fluid, respectively.
  • the inlet opening of the first pumping chamber comprises an inlet valve and the outlet opening of the second pumping chamber comprises an outlet valve, these valves being movable between an open configuration and a closed configuration for allowing or preventing the flow of a fluid, respectively.
  • the pump further comprises an actuator group configured to mediate the passage of each valve from the closed configuration to the open configuration and to promote a pumping of the fluid from the first to the second pumping chamber.
  • Another method of the present invention is a method for pumping a fluid comprising the steps of:
  • number 10 indicates a pump for the dosage of a fluid according to the present invention.
  • the pump 10 is particularly suitable for pumping a reducing element in a Selective Catalyst Reduction system for reducing the polluting emissions in diesel-cycle internal combustion engines.
  • This type of system usually uses compressed air devices to atomize a reducing element, such as a mixture of water and urea, inside a portion of the exhaust of a diesel-cycle internal combustion engine, dedicated to the development of a process of hydrolysis by which the nitric oxide cleaves into nitrogen and oxygen.
  • a reducing element such as a mixture of water and urea
  • the pump 10 includes a first pumping chamber 11 and a second pumping chamber 12.
  • the first pumping chamber 11 has an outlet opening suitable for being placed in fluid communication with a feeding device of a fluid and an outlet opening.
  • the feeding device may be a container for a reducing element which must be atomized inside the exhaust of an internal combustion engine so as to catalyse a reduction reaction of the pollutants contained in the exhaust gases, products of the combustion process of the engine, so as to promote its degradation into inert compounds or in any case not harmful or dangerous for the environment and for people.
  • the inlet opening of the first pumping chamber 11 further comprises an inlet valve 13 being movable between an open configuration, wherein the feeding device is in fluid communication with the first pumping chamber 11 and a closed configuration wherein the feeding device is not in fluid communication with the first pumping chamber 11.
  • the inlet valve 13 is configured to permit or prevent the unidirectional passage of a fluid from the feeding device to the first pumping chamber 11.
  • the inlet valve 13 will be open when it will be necessary to fill the first pumping chamber 11 and will instead be closed during an emptying step of the first pumping chamber 11 so as to guarantee that no fluid flows can occur from the first pumping chamber 11 towards the feeding device.
  • the second pumping chamber 12 has an inlet opening suitable for being placed in fluid communication with a using device of a fluid and an inlet opening.
  • the using device may be, for example, an exhaust of a diesel-cycle internal combustion engine.
  • the outlet opening of the second pumping chamber 12 further comprises an outlet valve 14 being movable between an open configuration wherein the second pumping chamber 12 is in fluid communication with the using device and a closed configuration wherein the second pumping chamber 12 is not in fluid communication with the using device.
  • the outlet valve 14 is configured to permit or prevent the unidirectional passage of a fluid from the second pumping chamber 12 to a using device.
  • the inlet valve 14 will be closed when it will be necessary to fill the second pumping chamber 12 and will instead be open during an emptying step of the first pumping chamber 12 so as to guarantee that no fluid flows can occur from the using device towards the second pumping chamber 12.
  • the pump 10 further comprises a transfer valve 15, interposed between the outlet opening of the first pumping chamber 11 and the inlet opening of the second pumping chamber 12.
  • the transfer valve is movable between an open configuration, wherein the first pumping chamber 11 is in fluid communication with the second pumping chamber 12 and a closed configuration wherein the first pumping chamber 11 is not in fluid communication with the second pumping chamber 12.
  • the transfer valve 15 will be closed when it will be necessary to fill the first pumping chamber 11 and to empty the second pumping chamber 12 and will instead be open when it will be necessary to promote the passage of a fluid from the first pumping chamber 11 to the second pumping chamber 12.
  • the transfer valve 15 also ensures that no fluid flows can occur from the second pumping chamber 12 towards the first pumping chamber 11.
  • the valves 13, 14, 15 consist of an alumina 99% precision ball and a conical seat made using the same material.
  • the pump 10 further comprises an actuator group 16 configured to mediate the passage of each valve 13, 14, 15 from the closed configuration to the open configuration and to promote a pumping of the fluid from the first pumping chamber 11 to the second pumping chamber 12.
  • the actuator group 16 by means of the opening / closing action of the valves, in particular those of inlet 13 and outlet 14, is further configured to recall a quantity of fluid to be supplied from the feeding device to the first pumping chamber 11 through the inlet valve 13 and to promote an ejection of the quantity of fluid to be supplied from the second pumping chamber 12 wards to the using device through the outlet valve 14.
  • the actuator group 16 comprises a piston 17 having a first end 17a, at least partially inserted in the first pumping chamber 11, and a second end 17b, at least partially inserted in the second pumping chamber 12 and a bush 20 capable of preventing undesirable fluid flows from one pumping chamber to the other and itself constituting the passage opening between the transfer valve 15 and the second pumping chamber 12.
  • the piston 17 has a substantially cylindrical shape, arranged along a main development direction "X".
  • the piston 17 is movable between a first position, shown in detail in Fig. 1a , wherein the piston 17 is inserted into the first pumping chamber 11, occupying a volume equal to a quantity of fluid to be supplied and a second position, shown in detail in Fig. 1b , wherein the piston is inserted into the second pumping chamber 12, occupying a volume equal to the quantity of fluid to be supplied.
  • the actuator group 16 further comprises activation means 18, preferably of the electromagnetic type, suitable to promote the passage of the piston from the first to the second position and the elastic return means 19 suitable to promote the movement of the piston from the second to the first position.
  • the activation means is a solenoid
  • the elastic return means consist of a spring
  • the activation means 18 can be activated by promoting the displacement of the piston 17 by overcoming the force of the elastic return means 19, thus compressing the fluid present in the first pumping chamber 11.
  • the inlet valve 13 is closed as the transfer valve 15 is being opened.
  • the outlet valve 14 is closed and the fluid is transferred from the first pumping chamber 11 to the second pumping chamber 12 by the combined effect of the compression in the first pumping chamber 11 and of the depression in the second pumping chamber 12 which was generated due to the displacement of the piston 17.
  • the inlet valve 13 opens and the difference in volume is balanced by the fluid recalled by the feeding device.
  • the volume of the piston 17 which had penetrated into the first pumping chamber 11 is retransferred into the second pumping chamber 12, compressing the fluid therein.
  • the pump 10 for measuring out a fluid advantageously presents a series of further expedients which are particularly suitable to improve the efficiency of the device, thus guaranteeing optimal precisions even in case of prolonged use over time, for example up to supplies of the reducing element in the order of 60000 litres.
  • the pump 10 comprises a bush 20 suitable to constrain the piston 17 to slide along a correct axial direction coinciding with the main development direction "X" of the piston 17 itself and simultaneously to perform the hydraulic sealing function to separate the two pumping chambers.
  • the pump 10 further comprises a piston guide 31 suitable to prevent the occurrence of radial loads and vibrations during the working step of the activation device 18 which could compromise the correct operation of the pump 10.
  • the pump 10 further comprises an upper end-stroke device 21 and a lower end-stroke device 22 suitable to define a maximum stroke of the piston 17 between the first and the second position.
  • the upper end-stroke device 21 and the lower end-stroke device 22 are made of rubber, in particular rubber having a hardness between 80 and 100 shores.
  • adjusting device 23 shown in detail in Fig. 2 , which allows the lower end-stroke device 22 to be moved so as to vary the length, increasing or decreasing it, of the maximum stroke of the piston 17 between the first and the second position.
  • the adjusting device 23 can be provided by means of a screw-nut screw coupling which allows the lower end-stroke device 22 to be brought closer or further away from the upper end-stroke device 21.
  • the piston 17 when in the second position, defines, in combination with the lower end-stroke device 22, a closing element of the outlet opening of the second pumping chamber 12.
  • the applied solution is therefore that of completely closing the outlet opening of the second pumping chamber 12 with the second end 17b of the piston 17 which is in contact with the lower end-stroke device 22 and, thanks to the thrust provided by the elastic return means 19 acts as an additional valve for closing the pump 10.
  • the fluid present between the second portion 17b of the piston 17 and the outlet valve 14 should be pressurized when, in order to exit from the pump, it must exceed the opening pressure of the outlet valve 14, ensuring that no suction effect will occur.
  • the pump 10 comprises a valve-opening device 24 configured to abut on one part of the outlet valve 14 when the piston 17 is in its second position by contributing to maintain the open configuration of the outlet valve 14 so as to guarantee that no suction effect occurs.
  • the pump 10 according to the present invention is particularly suitable for operating in a particularly wide range of temperatures, preferably between -40°C and 85°C without being damaged or having its performance altered.
  • the volume of the fluid contained in the pumping chambers 11, 12 may change in phase.
  • the freezing of the fluid generates an expansion of its volume, thus generating a pressure which will stress the structure of the pump 10 up to the point of causing a probable rupture.
  • the pump 10 comprises: a pump body 25 suitable to contain at least partially the actuator group 16; a valve body 26 suitable to contain the transfer valve 15 and a suction body 27 suitable to contain the inlet valve 13.
  • the pump body 25, the valve body 26 and the suction body 27 are respectively movable, preferably along the main development direction "X" of the piston 17.
  • the pump 10 comprises at least a second elastic return means suitable for promoting the repositioning of the bodies 25, 26, 27 and to cushion the movement of the pump body 25, the valve body 26 and the suction body 27, respectively, thus preventing an abrupt passage of the fluid inside the pump 10 to the solid phase from damaging the same.
  • the pumping chambers 11, 12 therefore have the possibility of being able to expand when necessary, not constraining the parts to each other and of always guaranteeing the same length of the stroke of the piston 17 when the pump 10 starts to operate, i.e. when the fluid inside the pump is completely defrosted.
  • the load of the second elastic return means 28 is sized to a value such that no movements are allowed to the moving parts of the pump 10 when this is operating within the above-specified operating range.
  • the second return means is made of a spring 28.
  • the pump 10 is provided preferably with a bellows seal 29, preferably made of elastomeric material.
  • the bellows seal 29 is associated to a coupling portion of the suction body 27 with a containment body 30 of the pump 10 and suitable to prevent dirt from entering inside the pump 10 from the external environment.
  • the presence of the bellows seal 29 allows to ensure that no entering of fluid or dust, in general impurities, occurs from the external environment towards the inside of the pump 10 itself, especially in the portion of the pump 10 wherein the suction body 27 is coupled to the containment body 30 which has the function of enclosing the components of the pump 10 and isolating them from the external environment.
  • the pump 10 further comprises a bush 20, preferably made of polyetherketone loaded with mineral additives which increase its tribological properties, acting as a piston guide and distributing the fluid flow from a pumping chamber to the other as well as having a function of sealing, guaranteed exclusively by a precise coupling between its internal diameter and the external diameter of the piston 17, and a second piston guide 31, preferably made of the same material as the bush 20, which only performs the function of guiding the piston avoiding harmful radial loads during the working step of the activation means 18.
  • a bush 20 preferably made of polyetherketone loaded with mineral additives which increase its tribological properties, acting as a piston guide and distributing the fluid flow from a pumping chamber to the other as well as having a function of sealing, guaranteed exclusively by a precise coupling between its internal diameter and the external diameter of the piston 17, and a second piston guide 31, preferably made of the same material as the bush 20, which only performs the function of guiding the piston avoiding harmful radial loads during the working step of the activation means 18.
  • the second piston guide 31 have to guarantee the passage of the fluid not effectively pumped, as otherwise there would be the risk to prevent the fluid from flowing outwards, the passage section of the bush is therefore preferably equal to at least 1.5 times the smallest passage section crossed by the fluid exiting the second pumping chamber 12.
  • the pumping method comprises the steps of:
  • the pumping of the fluid from the feeding device to the using device takes place through the movement, by the actuator group 16, of the piston 17 from the first to the second position, directly causing the opening and closing of the inlet valves 13, valve of output 14 and transfer valve 15.
  • the activation means 18 is energized causing the piston 17 to pass from the second position to the first position, overcoming the force exerted by the elastic return means 19.
  • the fluid present in the first pumping chamber 11 is compressed, thereby exerting a pressure on the inlet valve 13, ensuring its closure, while the transfer valve 15 is being opened.
  • This operation ensures a high hydraulic efficiency as well as preventing any hammering due to rapid fluid displacements from creating pressure imbalances between one chamber and the other, thus avoiding the occurrence of over-pumping or overdosing phenomena or, vice versa, uncontrolled losses of hydraulic efficiency.
  • the pressure increase in the first pumping chamber 11 also avoids the occurrence of bonding phenomena due to the suction effect between the piston 17 and the upper end-stroke device 21 and counteracts phenomena of magnetic resorption due to the magnetic hysteresis of the materials constituting the pump 10.
  • the actuator group 16 is deactivated, interrupting the energization of the activation means 18.
  • the piston 17 then passes from the first position to the second position due to the force exerted by the elastic return means 19, no longer opposed by the force exerted on the piston 17 by the activation means 18.
  • the fluid present in the second pumping chamber 12 is compressed, thereby simultaneously exerting a pressure on the outlet valve 14, ensuring its opening and therefore the passage of the fluid towards a using device, while the transfer valve 15 remains closed, thus preventing the return of the fluid in the first pumping chamber 11.
  • the volume of the piston 17 which is penetrating into the second pumping chamber 12 is missing, creating a depression which guarantees the opening of the inlet valve 13 thus allowing to recall a quantity of fluid which is equal to the quantity of fluid to be supplied in the first pumping chamber 11 from the feeding device.
  • step B) and the step F) occur simultaneously.
  • the quantity of fluid to be supplied passes from the first pumping chamber 11 to the second pumping chamber 12, whereas when the actuator group 16 is deactivated, the quantity of fluid to be supplied is pumped from the second pumping chamber 12 to the using device, and the same quantity of fluid is restored in the first pumping chamber 11.
  • step D) the transfer valve 15 is in its open configuration, whereas the inlet 13 and outlet 14 valves are in closed configuration.
  • the first pumping chamber 11 there is a quantity of fluid which is lower than the quantity of fluid to be supplied.
  • step D wherein transfer valve 15 and the inlet valve 13 are in open configuration, whereas the closing valve 14 is in closed configuration.
  • the pump 10 for measuring out of the present invention and the relating method allow to obtain precision levels with errors lower than 5% over the entire range of the required flow rates, of the entre supply voltage range and of the entire range of admissible pressures both on delivery and in suction.
  • the present invention allows to obtain precision levels with errors lower than 2%.
  • the present invention provides a pump 10 for measuring out a fluid capable of guaranteeing high levels of precision and high operating efficiency even after a considerable number of drives, for example for a pump with a maximum displacement of 0.0625 cc even after the 60000 L of supply equal to about 1 billion complete strokes of the piston 17.
  • the presence of the double pumping chamber ensures the high precision of the quantity of fluid supplied by the pump 10.
  • the presence of the adjusting device 23 ensures the correct operation of the pump 10 independently of any defects / differences in the single components of the pumps 10.
  • the modularity generated by the subdivision of the various components in the bodies 25, 26, 27, and their respective mobility ensures the correct operation of the pump also following a freezing event of the fluid contained therein.
  • valve-opening device 24 ensures, in particular during the periods of pump stop, wherein it is necessary to ensure the correct closure of the outlet opening of the second pumping chamber 12, the non-occurrence of suction effects which could cause a delay in the activation of the piston 17 movement.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)

Claims (18)

  1. Pumpe zum Messen einer Flüssigkeit umfassend eine erste Pumpenkammer (11) aufweisend:
    - eine Einlassöffnung, die geeignet ist, in Fluidverbindung mit der Zuführungsvorrichtung gebracht zu werden; und
    - eine Auslassöffnung,
    wobei die Einlassöffnung der ersten Pumpenkammer (11) ein Einlassventil (13) umfasst, das zwischen der offenen Konfiguration, in der die Zuführvorrichtung in Fluidverbindung mit der ersten Pumpenkammer (11) steht und einer geschlossenen Konfiguration, in der die Zuführvorrichtung nicht in Fluidverbindung mit der ersten Pumpenkammer (11) steht, beweglich ist,
    - eine zweite Pumpenkammer (12) aufweisend eine Auslassöffnung, die geeignet ist, in Fluidverbindung mit einer Benutzungsvorrichtung gebracht zu werden und einer Einlassöffnung, wobei die Auslassöffnung der zweiten Pumpenkammer (12) ein Auslassventil (14) umfasst, das zwischen einer offenen Konfiguration, in der die zweite Pumpenkammer (12) in Fluidverbindung mit der Benutzungsvorrichtung steht und einer zweiten Konfiguration, in der die Benutzungsvorrichtung nicht in Fluidverbindung mit der zweiten Pumpenkammer (12) steht, beweglich ist;
    - eine Antriebsgruppe (16), die so ausgebildet ist, dass sie den Wechsel jedes Ventils (13, 14, 15) von der geschlossenen Konfiguration zur offenen Konfiguration vermittelt und das Pumpen der Flüssigkeit von der ersten Pumpenkammer (11) zur zweiten Pumpenkammer (12) fördert; dadurch gekennzeichnet, dass sie ferner umfasst
    - ein Transferventil (15), das zwischen der Auslassöffnung der ersten Pumpenkammer (11) und der Einlassöffnung der zweiten Pumpenkammer (12) eingesetzt ist und das zwischen einer offenen Konfiguration, in der die erste Pumpenkammer (11) in Fluidverbindung mit der zweiten Pumpenkammer (12) steht und einer geschlossenen Konfiguration, in der die erste Pumpenkammer (11) nicht in Fluidverbindung mit der zweiten Pumpenkammer (12) steht, beweglich ist.
  2. Pumpe nach Anspruch 1, wobei die Antriebsgruppe (16) einen Kolben (17) umfasst, dessen erstes Ende (17a) zumindest teilweise in die erste Pumpenkammer (11) eingesetzt ist und dessen zweites Ende (17b) zumindest teilweise in die zweite Pumpenkammer (12) eingesetzt ist.
  3. Pumpe nach Anspruch 2, wobei der Kolben (17) zwischen einer ersten Position, in der der Kolben (17) in die erste Pumpenkammer (11) eingesetzt ist und ein Volumen einnimmt, das der Menge der zu versorgenden Flüssigkeit entspricht, und einer zweiten Position, in der der Kolben (17) in die zweite Pumpenkammer (12) eingesetzt ist und ein Volumen einnimmt, das der Menge der zu versorgenden Flüssigkeit entspricht, beweglich ist.
  4. Pumpe nach Anspruch 3, wobei, wenn sich der Kolben (17) in seiner ersten Position befindet, das Einlassventil (13) und das Auslassventil (14) sich in ihrer geschlossenen Konfiguration befinden, während sich das Transferventil (15) in seiner offenen Konfiguration befindet, und wenn sich der Kolben (17) sich in seiner zweiten Konfiguration befindet, das Einlassventil (13) und das Auslassventil (14) sich in ihrer offenen Konfiguration befinden, während sich das Transferventil (15) in seiner geschlossenen Konfiguration befindet.
  5. Pumpe nach einem oder mehreren der vorhergehenden Ansprüche 2 bis 4, wobei die Antriebsgruppe (16) Aktivationsmittel (18), vorzugsweise elektromagnetische Mittel, umfasst, die geeignet sind, die Bewegung des Kolbens (17) von der ersten in die zweite Position zu fördern, und die Bewegung der elastischen Rückstellmittel (19), die geeignet sind, die Bewegung des Kolbens (17) von der zweiten in die erste Position zu fördern.
  6. Pumpe nach einem oder mehreren der vorhergehenden Ansprüche 2 bis 5, wobei die Antriebsgruppe (16) ein Führungselement (20) umfasst, das geeignet ist, den Kolben (17) zu zwingen, entlang einer axialen Richtung zu gleiten, die mit einer Hauptentwicklungsrichtung (X) des Kolbens (17) zusammenfällt.
  7. Pumpe nach einem oder mehreren der vorhergehenden Ansprüche 3 bis 6, wobei die Antriebsgruppe (16) eine obere Endhubvorrichtung (21) und eine untere Endhubvorrichtung (22) umfasst, die geeignet sind, den maximalen Hub des Kolbens (17) zwischen der ersten und der zweiten Position zu definieren.
  8. Pumpe nach Anspruch 7, umfassend eine Einstellvorrichtung (23), die geeignet ist, die untere Endhubvorrichtung (22) durch Erhöhen oder Reduzieren des maximalen Hubs des Kolbens (17) zwischen der ersten und der zweiten Position zu bewegen.
  9. Pumpe nach Anspruch 7 oder 8, wobei der Kolben (17) in seiner zweiten Position zusammen mit der unteren Endhubvorrichtung (22) ein Verschlusselement der Auslassöffnung der zweiten Pumpenkammer (12) definiert.
  10. Pumpe nach einem oder mehreren der vorhergehenden Ansprüche 3 bis 9, umfassend eine Ventilöffnungsvorrichtung (24), die so ausgebildet ist, dass sie an einem Teil des Auslassventils (14) anliegt, wenn sich der Kolben (17) in seiner zweiten Position befindet, indem sie dazu beiträgt, die offene Konfiguration des Auslassventils (14) zu halten.
  11. Pumpe nach einem oder mehreren der vorhergehenden Ansprüche, umfassend:
    - einen Pumpenkörper (25), der geeignet ist, die Antriebsgruppe (16) zumindest teilweise aufzunehmen;
    - einen Ventilkörper (26), der zur Aufnahme des Transferventils (15) geeignet ist;
    - ein Ansaugkörper (27), der zur Aufnahme des Einlassventils (13) geeignet ist;
    wobei der Pumpenkörper (25), der Ventilkörper (26) und der Saugkörper (27) jeweils beweglich sind.
  12. Pumpe nach Anspruch 11, umfassend mindestens ein zweites Federrückstellmittel (28), das geeignet ist, die jeweilige Bewegung des Pumpenkörpers (25), des Ventilkörpers (26) und des Saugkörpers (27) zu dämpfen.
  13. Pumpe nach Anspruch 11 oder 12, umfassend eine Balgdichtung (29), vorzugsweise aus elastomerem Material, die einem Verbindungsabschnitt des Ansaugkörpers (27) mit einem Behälterkörper (30) der Pumpe (10) zugeordnet ist und geeignet ist, das Eindringen von Schmutz aus der äußeren Umgebung in das Innere der Pumpe (10) zu verhindern.
  14. Verfahren zum Pumpen einer Flüssigkeit, das die folgenden Schritte umfasst:
    A) Vorbereiten einer Pumpe zum Messen einer Flüssigkeit nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 13;
    B) Pumpen einer Flüssigkeitsmenge, die von einer Zuführvorrichtung in die erste Pumpenkammer (11) versorgt werden soll;
    C) Aktivieren der Antriebsgruppe (16) durch Förderung der Bewegung des Transferventils (15) von der geschlossenen in die offene Konfiguration;
    D) Pumpen der zu versorgenden Flüssigkeitsmenge aus der ersten Pumpenkammer (11) in die zweite Pumpenkammer (12);
    E) Deaktivieren der Antriebsgruppe (16) durch Förderung der Bewegung des Transferventils (15) von der offenen Konfiguration in die geschlossene Konfiguration; und
    F) Pumpen der zu versorgenden Flüssigkeitsmenge aus der zweiten Pumpenkammer (12) in die Benutzungsvorrichtung.
  15. Verfahren nach Anspruch 14, wobei die Schritte B) und F) gleichzeitig durchgeführt werden.
  16. Verfahren nach Anspruch 14 oder 15, wobei während des Schritts F) das Transferventil (15) in seiner geschlossenen Konfiguration ist, während die Einlass- (13) und Auslassventile (14) in offener Konfiguration sind.
  17. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche 14 bis 16, wobei während des Schritts D) das Transferventil (15) in seiner offenen Konfiguration ist, während die Einlass- (13) und Auslassventile (14) in geschlossener Konfiguration sind.
  18. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche 14 bis 16, wobei während des Schritts D) das Transferventil (15) und das Einlassventil (13) in offener Konfiguration sind, während das Auslassventil (14) in geschlossener Konfiguration ist.
EP18847225.2A 2018-12-03 2018-12-03 Pumpe zur ausmessung eines fluids Active EP3891394B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2018/000154 WO2020115776A1 (en) 2018-12-03 2018-12-03 Pump for measuring out a fluid

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EP3891394A1 EP3891394A1 (de) 2021-10-13
EP3891394B1 true EP3891394B1 (de) 2023-07-19

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EP (1) EP3891394B1 (de)
CN (1) CN113167255B (de)
WO (1) WO2020115776A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4568250A (en) * 1982-09-07 1986-02-04 Greatbatch Enterprises, Inc. Low power electromagnetic pump
EP1748188B1 (de) * 2005-07-29 2008-09-03 Truma Gerätetechnik GmbH & Co. KG Dosierpumpe
EP2873857B1 (de) * 2013-11-15 2020-08-19 ODE (Hk) Company Limited Flüssigkeitspumpe
EP3250823A1 (de) * 2015-01-28 2017-12-06 Corob S.P.A. Con Socio Unico Doppelkammerkolbenpumpe zur verteilung von flüssigen produkten
DE102015107207A1 (de) * 2015-05-08 2016-11-10 Pierburg Gmbh Magnetpumpe für ein Hilfsaggregat eines Fahrzeugs

Also Published As

Publication number Publication date
EP3891394A1 (de) 2021-10-13
CN113167255B (zh) 2023-08-18
CN113167255A (zh) 2021-07-23
WO2020115776A1 (en) 2020-06-11

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