EP3269979B1 - Pompe de distribution de liquide. - Google Patents

Pompe de distribution de liquide. Download PDF

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Publication number
EP3269979B1
EP3269979B1 EP17180434.7A EP17180434A EP3269979B1 EP 3269979 B1 EP3269979 B1 EP 3269979B1 EP 17180434 A EP17180434 A EP 17180434A EP 3269979 B1 EP3269979 B1 EP 3269979B1
Authority
EP
European Patent Office
Prior art keywords
pump
liquid
delivery
valves
suction
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.)
Active
Application number
EP17180434.7A
Other languages
German (de)
English (en)
Other versions
EP3269979A1 (fr
Inventor
Gianni Paderni
Fabio Pedroni
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.)
Leuco SpA
Original Assignee
Leuco SpA
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Publication of EP3269979A1 publication Critical patent/EP3269979A1/fr
Application granted granted Critical
Publication of EP3269979B1 publication Critical patent/EP3269979B1/fr
Active 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
    • F04B17/06—Mobile combinations
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • F04B49/035—Bypassing
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics

Definitions

  • the invention relates to a pump for dispensing a liquid in a desired environment, particularly for dispensing water, to which one or more additional substances can be added.
  • the pump according to the invention is particularly suitable for processing a cleaning liquid, such as water, possibly with the addition of detergent substances, by sending such liquid onto a surface to be cleaned.
  • the pump according to the invention may be for example used in a high pressure water jet machine.
  • Known pumps may also comprise a pressure adjusting valve on which an operator may act manually for adjusting the flow rate, and consequently the pressure, of the water exiting from the pump.
  • the pressure adjusting valve is normally positioned in a lateral region of the head, next to the row of delivery valves.
  • An object of the invention is to improve the pumps of known type, particularly the pumps intended to process a liquid, for example water, to be dispensed on a surface or in an environment.
  • a further object is to provide a pump equipped with an adjusting valve that allows the flow rate, and consequently the pressure, of a liquid exiting from the pump to be adjusted, in which the operator can easily access the adjusting valve.
  • the sealing means may comprise a first sealing element 14 arranged in a closer position to the chamber 6, and a second sealing element 15, arranged in a more distant position from the chamber 6.
  • the first sealing element 14 can also be considered as a high pressure gasket, while the second sealing element 15 can be considered as a low pressure gasket.
  • the delivery valves 17 are arranged along a second sequence which, in the example depicted, is defined by a rectilinear row.
  • the delivery valves 17 extend along respective axes Y, shown in Figure 3 , which may be mutually parallel and possibly lie on a common plane. In the example shown in Figure 3 , such plane is vertical.
  • the adjusting valve 25 could be interposed between the second and the third delivery valve 17, from the bottom upwards in the view of Figure 1 .
  • the knob 26 may be absent and the containment element 27 can be used also as a control element on which the operator acts to adjust the pressure of the liquid exiting from the pump.
  • the communication conduit 34 can extend along the axis Y1.
  • the spring 28 pushes the shutter 30 towards the bushing 33, i.e. it tends to close the shutter 30.
  • the pressure of the liquid in the housing 31 tends instead to distance the shutter 30 from the bushing 33, so as to move the shutter 30 towards the maximum opening position.
  • the quantity of liquid that is recirculated from the delivery to the suction of the pump 1 through the adjusting valve 25 is maximum in the maximum opening position of the shutter 30 and decreases gradually in the intermediate positions, until it reaches zero in the closed position.
  • the flow rate (and therefore the pressure) of the liquid exiting from the pump 1 is minimum, since the recirculation of liquid from the delivery to the suction of the pump 1 is maximised.
  • the shutter 30 moves further away from the bushing 33, with a consequent increase in the amount of liquid recirculated from the delivery to the suction of the pump 1 and a reduction of the flow rate of liquid exiting from the pump 1.
  • a sequence of operations opposite to that described above allows the flow rate of liquid at the outlet from the pump 1 to be increased, and therefore the pressure of the liquid dispensed to be increased, starting from the maximum opening position of the shutter 30.
  • the liquid can be dispensed by the pump 1 onto the surface to be cleaned or, more generally, into the environment to be treated, by means of a dispensing device, conformed for example as a delivery gun, connected to an outlet 35 of the pump 1, for example through a delivery tube not depicted.
  • a dispensing device conformed for example as a delivery gun
  • a quick coupling fitting 49 can be associated with the outlet 35 to allow the delivery tube of the pump 1 to be quickly engaged or disengaged.
  • the outlet 35 is defined at the end of an outlet conduit made in a protrusion 36 that projects from the head 4.
  • the outlet conduit made in the protrusion 36 comprises an initial portion 37 that extends from the outlet manifold 19.
  • Such outlet conduit further comprises a final portion 38 arranged near the outlet 35, particularly inside the quick coupling fitting 49.
  • the shutter device 39 is configured to open or alternatively close the initial portion 37, so as to put the initial portion 37 in fluid communication with the final portion 38, or alternatively separate the initial portion 37 from the final portion 38.
  • An adding device 43 is provided for adding an additive to the liquid exiting from the pump 1, particularly a detergent substance.
  • the adding device 43 comprises a connector 42, which projects from the protrusion 36 transversely to the axis X1.
  • the connector 42 is suitable for being connected to an additive tank not depicted.
  • Inside the connector 42 a passage 44 is made through which the additive can flow to reach the liquid that is exiting from the pump 1.
  • the passage 44 extends transversely, in particular, perpendicularly, to the axis X1.
  • the passage 44 can be closed by means of a closing body 45, conformed for example like a ball, on which an elastic element 46 acts, the elastic element 46 being conformed for example like a helical spring.
  • the elastic element 46 is configured to push the closing body 45 into a position such as to close the passage 44.
  • the adding device 43 is positioned near to, or at, the narrowing 40, so that the detergent substance is injected into such narrowing.
  • the delivery tube When the liquid is to be dispensed onto the surface to be cleaned or in general into the environment to be treated, the delivery tube is connected to the outlet 35, the delivery gun being connected to the delivery tube.
  • the delivery gun On the delivery gun there is provided an on/off type opening device, which the user can arrange in an open configuration or alternatively in a closed configuration.
  • the user positions the on/off type opening device in the open configuration and the pressure of the liquid in the initial portion 37 of the outlet conduit opens the shutter device 39, by overcoming the resistance of a spring element 48 included in the shutter device 39.
  • the liquid can thus reach the final portion 38 and be directed towards the delivery gun through the delivery tube.
  • the detergent substance can thus flow through the passage 44 and be mixed with the liquid exiting from the pump in the narrowing 40. In this way it is possible to dispense onto the surface to be cleaned a liquid that already has the detergent substance added to it.
  • the user When the user decides to interrupt dispensing of the liquid on the surface to be cleaned or into the environment to be treated, the user positions the on/off type opening device provided on the delivery gun in the closed configuration. Therefore, the liquid cannot exit through the delivery gun.
  • the pump 1 instead continues to operate, while waiting for the user to reactivate the delivery gun.
  • pressurised liquid A certain amount of pressurised liquid remains in the delivery tube.
  • This pressurised liquid cannot exit from the delivery gun due to a pressure surge (water hammer) within the protrusion 36, which generates a force directed from the final portion 38 towards the initial portion 37.
  • This force acts on the shutter device 39 by pushing the shutter device 39 into the respective closed position, shown in Figure 6 . Therefore the outlet conduit made in the protrusion 36 is closed, i.e. the fluid communication between the initial portion 37 and the final portion 38 is interrupted.
  • the pressurised liquid that flows into the connecting hole 47 allows the shutter 30 to be opened. By so doing, excessive pressures in the head 4 of the pump 1 are avoided, which excessive pressures might be due to the pressurised liquid contained in the delivery tube connected to the outlet 35.
  • the pressure surge in the outlet conduit made inside the protrusion 36 further causes closing of the adding device 43, because the closing body 45 is pushed by the elastic element 46 towards the connector 42, therefore closing the passage 44. In this way, dispensing of the detergent substance through the passage 44 is interrupted.
  • the liquid contained in the delivery tube and more generally downstream of the shutter device 39 can reach the adjusting valve 25.
  • the pressure surge due to the liquid that cannot exit from the delivery tube generates a force that detaches the shutter 30 from the bushing 33.
  • the outlet manifold 19 is put in fluid communication with the inlet manifold 18 through the connecting conduit 32. Consequently, the liquid flows from the outlet manifold 19 towards the inlet manifold 18, thereby protecting the components of the pump 1 against any damage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Claims (10)

  1. Pompe comprenant :
    - une pluralité de pistons (5) chacun pouvant coulisser à l'intérieur d'un cylindre pour varier le volume d'une chambre (6) correspondante,
    - une pluralité de clapets d'aspiration (16), chacun étant associé à une chambre (6) et actionnable pour permettre à un liquide d'entrer dans la chambre (6), les clapets d'aspiration (16) étant disposés dans une première séquence,
    - une pluralité de clapets de refoulement (17), chacun étant associé à une chambre (6) et actionnable pour permettre au dit liquide de s'écouler hors de la chambre (6), les clapets de refoulement (17) étant disposés dans une seconde séquence,
    - une soupape régulatrice (25) servant à régler la pression du liquide sortant de la pompe (1),
    dans laquelle la soupape régulatrice (25) est interposée entre deux clapets consécutifs d'une séquence choisie entre ladite première séquence et ladite seconde séquence, la pompe (1) comprenant de plus :
    - un conduit de sortie disposé en aval des clapets de refoulement (17),
    caractérisée en ce que la pompe (1) comprend de plus :
    - un dispositif obturateur (39) interposé entre une partie initiale (37) du conduit de sortie et une partie finale (38) du conduit de sortie de sorte à mettre la partie initiale (37) en communication fluidique avec la partie finale (38), ou alternativement à séparer la partie initiale (37) de la partie finale (38),
    - un orifice de raccordement (47) servant à raccorder une partie du conduit de sortie, disposé en aval du dispositif obturateur (39), à la soupape régulatrice (25).
  2. Pompe selon la revendication 1, dans laquelle la soupape régulatrice (25) est interposée entre deux clapets de refoulement (17) consécutifs de ladite seconde séquence.
  3. Pompe selon la revendication 1 ou 2, dans laquelle les clapets d'aspiration (16) se prolongent le long d'axes respectifs (X), la soupape régulatrice (25) se prolongeant le long d'un axe (Y1) étant oblique par rapport aux axes (X) des clapets d'aspiration (16).
  4. Pompe selon la revendication 3, dans laquelle les axes (X), le long desquels les clapets d'aspiration (16) se prolongent, sont mutuellement parallèles.
  5. Pompe selon l'une quelconque des revendications précédentes, dans laquelle la soupape régulatrice (25) est configurée pour sélectivement mettre un refoulement de la pompe (1) en communication fluidique avec une aspiration de la pompe (1) de sorte qu'une quantité de liquide peut être recirculée du refoulement à l'aspiration afin de varier le débit de liquide sortant de la pompe (1).
  6. Pompe selon la revendication 5, dans laquelle la soupape régulatrice (25) comprend un obturateur (30) au moins partiellement positionné dans un logement (31), la pompe (1) comprenant de plus un conduit de raccordement (32) qui relie le logement (31) au refoulement de la pompe (1), l'obturateur (30) étant configuré pour isoler ou alternativement relier le logement (31) à un conduit de communication (34), le conduit de communication (34) étant en communication fluidique avec l'aspiration de la pompe (1).
  7. Pompe selon la revendication 6, dans laquelle le conduit de raccordement (32) relie le logement (31) à un clapet de refoulement (17) de ladite pluralité de clapets de refoulement (17), le conduit de communication (34) reliant sélectivement le logement (31) à un collecteur de sortie (19), le collecteur de sortie (19) étant configuré pour envoyer le liquide au clapets d'aspiration (16).
  8. Pompe selon la revendication 6 ou 7, dans laquelle l'obturateur (30) a une position à l'intérieur du logement (31), ladite position pouvant être déterminée en fonction de la pression du liquide à l'intérieur du logement (31) et d'une force exercée par un ressort (28) sur l'obturateur (30), la soupape régulatrice (25) comprenant de plus un élément de commande (26 ; 27) actionnable par un utilisateur pour régler la force exercée par ledit ressort (28).
  9. Pompe selon l'une quelconque des revendications précédentes, dans laquelle ledit conduit de sortie comporte un rétrécissement (40) de sa section transversale.
  10. Pompe selon la revendication 9, et comprenant de plus un dispositif d'addition (43) faisant face au dit rétrécissement (40), le dispositif d'addition (43) pouvant s'ouvrir en vertu d'une action d'aspiration générée par un écoulement de liquide passant à travers le conduit de sortie de sorte que le dispositif d'addition (43) introduit un additif dans ledit écoulement de liquide.
EP17180434.7A 2016-07-11 2017-07-10 Pompe de distribution de liquide. Active EP3269979B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000072149A IT201600072149A1 (it) 2016-07-11 2016-07-11 Pompa per erogare un liquido.

Publications (2)

Publication Number Publication Date
EP3269979A1 EP3269979A1 (fr) 2018-01-17
EP3269979B1 true EP3269979B1 (fr) 2019-09-04

Family

ID=57610080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17180434.7A Active EP3269979B1 (fr) 2016-07-11 2017-07-10 Pompe de distribution de liquide.

Country Status (4)

Country Link
US (1) US20180010597A1 (fr)
EP (1) EP3269979B1 (fr)
CN (1) CN107605688B (fr)
IT (1) IT201600072149A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3824182B1 (fr) * 2018-07-17 2024-10-16 Insulet Corporation Valves à faible force pour pompes d'administration de médicament
ES2890531T3 (es) * 2018-11-05 2022-01-20 P A S P A Conjunto de boquilla de chorro giratorio para dispositivos de limpieza a presión
USD932519S1 (en) 2018-12-20 2021-10-05 Leuco S.P.A. Hydraulic pump
FR3096094B1 (fr) * 2019-05-14 2022-11-25 Ams R&D Sas Pompe de circulation de fluide.

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US5230471A (en) * 1991-03-08 1993-07-27 Shop-Vac Corporation Pressure washer
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CN2917836Y (zh) * 2005-05-24 2007-07-04 吴胜顺 一种可完全卸荷的清洗机
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CN102797657A (zh) * 2012-07-20 2012-11-28 浙江驰江工贸有限公司 曲轴式高压清洗泵
CN102989734A (zh) * 2012-11-23 2013-03-27 上海亿力电器有限公司 一种用于高压清洗机的低保压溢流停机装置

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Also Published As

Publication number Publication date
CN107605688B (zh) 2020-10-20
EP3269979A1 (fr) 2018-01-17
IT201600072149A1 (it) 2018-01-11
US20180010597A1 (en) 2018-01-11
CN107605688A (zh) 2018-01-19

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