EP4230267A1 - Pumpensystem für ein feuerlöschmischungserzeugungssystem - Google Patents

Pumpensystem für ein feuerlöschmischungserzeugungssystem Download PDF

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Publication number
EP4230267A1
EP4230267A1 EP23157172.0A EP23157172A EP4230267A1 EP 4230267 A1 EP4230267 A1 EP 4230267A1 EP 23157172 A EP23157172 A EP 23157172A EP 4230267 A1 EP4230267 A1 EP 4230267A1
Authority
EP
European Patent Office
Prior art keywords
pump system
crankshaft
firefighting
delivery
delivery volume
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
EP23157172.0A
Other languages
English (en)
French (fr)
Other versions
EP4230267C0 (de
EP4230267B1 (de
Inventor
Oliver Semmler
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.)
Magirus GmbH
Original Assignee
Magirus GmbH
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 Magirus GmbH filed Critical Magirus GmbH
Publication of EP4230267A1 publication Critical patent/EP4230267A1/de
Application granted granted Critical
Publication of EP4230267C0 publication Critical patent/EP4230267C0/de
Publication of EP4230267B1 publication Critical patent/EP4230267B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/02—Making of fire-extinguishing materials immediately before use of foam
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/16—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having two or more sets of cylinders or pistons
    • 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
    • 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
    • F04B49/005—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 changing the phase relationship of two working pistons in one working chamber or the phase-relationship of a piston and a driven distribution member
    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C27/00—Fire-fighting land vehicles
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/002—Apparatus for mixing extinguishants with water
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1208—Angular position of the shaft
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/09—Flow through the pump

Definitions

  • the present invention concerns a pump system, in particular a variable volume pump system for a generation system of a firefighting mixture to be used for firefight.
  • the present invention finds its preferred, although not exclusive, application in a generation system of a firefighting mixture; reference will be made to this application by way of example below even if it that may be applied to other purposes.
  • Firefighting vehicles comprise firefighting mixture generation systems configured to provide a firefighting mixture fluid that can be used by rescuers in firefighting operations.
  • Such firefighting mixture generation system comprises pump means configured to pressurize a fluid, such as foam or water, towards a mixing module.
  • the flow of pressurized fluid that may be provided by the pump means strictly depends by the volume of the pump and the rotating speed of power module, such as an internal combustion engine or a electric motor, carrying the pump.
  • power module such as an internal combustion engine or a electric motor
  • the flow cannot be varied.
  • An aim of the present invention is to satisfy the above mentioned needs in a cost-effective and optimized manner.
  • the attached figures discloses a pump system 1 configured to suck a fluid from a source of fluid, i.e. an upstream source of fluid (not shown), pressurize such sucked fluid and provide the latter to an operative module, i.e. a downstream operative module (not shown) for related use of this latter.
  • a source of fluid i.e. an upstream source of fluid (not shown)
  • pressurize such sucked fluid and provide the latter to an operative module, i.e. a downstream operative module (not shown) for related use of this latter.
  • the source of fluid may be a tank of fluid, such as foam or water, or an external source such as a hydrant and the operative module may be a mixing system of a firefighting mixture system of a firefighting vehicle.
  • the pump system 1 comprises a casing 2 comprising two main portions 2', 2" each defining a space 3', 3". In each space 3', 3' a piston 4', 4" may slide in a fluid tight manner.
  • the two spaces 3', 3" are fluidly connected together by a conduit 5 that allows fluidic communication between spaces 3', 3". Accordingly, the spaces 3', 3" and conduit 5 define a common pump volume 6 representing the volume of fluid that may be pumped by pump system 1.
  • Pistons 4, 4" are configured to move linearly along a direction of a travel axis A along the respective space 3', 3" that therefore have a variable volume according to the piston position; accordingly, pump volume 6 varies according to variation of spaces 3', 3".
  • conduit 5 is realized coaxial to said axis A, i.e. coaxial to pistons 4', 4".
  • each space is furthermore connected by a suction conduit 8', 8" to the fluid source and by a delivery conduit 7', 7" to the operative module.
  • pump system 1 comprises a check valve 9 fluidly interposed within each delivery and suction conduits 7', 7", 8', 8" and configured to respectively allow the passage of fluid from fluid source to spaces 3', 3" via suction conduits 8', 8" and allow ejection of pressurized fluid to operative module from spaces 3', 3" via delivery conduits 7', 7".
  • housing 2 conduit 5 and at least part of delivery and suction conduits 7', 7", 8', 8" is realized as one piece.
  • Each piston 4', 4" is carried by a respective crankshaft mechanism 11', 11' configured to carry the piston 4', 4" to slide within the respective space 3', 3" along axis A.
  • Each crankshaft mechanism 11', 11" comprises a crankshaft 13', 13'' and a connection rod 12', 12'' connected by respective movable connections, such us hinges, to the piston 4', 4" and the crankshaft 13', 13".
  • the crankshaft 13', 13" rotates about respective rotation axis B', B" thereby moving via connection rod 12', 12'' the piston 4', 4" along axis A.
  • connection rods 12', 12'' of the pistons are connected on vertically, i.e. in a direction perpendicular to axis A, on opposite position with respect to crankshaft 13', 13".
  • crankshaft 13', 13" rotates in the same rotation direction and the pistons 4', 4" are faced one with respect to another.
  • the pump system 1 furthermore comprises regulation means 15 configured to vary the rotation phase angle between crankshafts 13', 13".
  • regulation means 15 can vary the volume 5, i.e. pump flow, between a minimum and a maximum value, even if the crankshafts 13', 13" speed is maintained constant.
  • Such regulation means 15 may be realized in a different way, such as via mechanical regulation means e.g. belt connection with adjustable belt length, adjustable hub length of the crankshaft or by electro-mechanical means such as a drive carried by an electric motor.
  • mechanical regulation means e.g. belt connection with adjustable belt length, adjustable hub length of the crankshaft or by electro-mechanical means such as a drive carried by an electric motor.
  • the pistons 4', 4" are carried in their motion by respective crankshaft systems 11', 11' thereby moving alternatively along axis A direction. Accordingly, when volume 5 is expanded, fluid enters via suction conduits 8', 8" while when the volume 5 is compressed, fluid is ejected through delivery conduits 8', 8". During the operation of the pump, the check valves 9 avoid passage of fluid in the wrong directions.
  • crankshaft In a first operative condition, shown in figure 1 , the crankshaft are shifted of an angle ⁇ of 180° so that their motion is totally opposite along axis A.
  • the continuous line indicates the motion of one cylinder and the discontinued line indicates the motion of the opposite cylinder; it is clear that such motions are opposite.
  • the dots-lines line indicates the variation of delivery flow of pump 1 that varies accordingly from a minimum to a maximum value.
  • crankshaft In a second operative condition, shown in figure 5 , the crankshaft are not shifted, i.e. shifted of an angle ⁇ of 0° so that their motion is concordant along axis A.
  • the continuous line indicates the motion of one cylinder and the discontinued line indicates the motion of the opposite cylinder; it is clear that such motions are concordant.
  • the dots-lines line indicates the variation of delivery flow of pump 1 that is always zero since no variation of volume 6 can be achieved in such motion.
  • crankshaft are not shifter, i.e. shifted of 0° so that their motion is concordant along axis A.
  • the continuous line indicates the motion of one cylinder and the discontinued line indicates the motion of the opposite cylinder; it is clear that such motions are concordant.
  • the dots-lines line indicates the variation of delivery flow of pump 1 that is always zero since no variation of volume 6 can be achieved in such motion.
  • crankshaft In a fourth operative condition, shown in figure 3 , the crankshaft are shifted of an angle comprised between 0° and 180°, so that their motion is partially concordant one with respect to the other.
  • the continuous line indicates the motion of one cylinder and the discontinued line indicates the motion of the opposite cylinder; it is clear that such motions are concordant.
  • the dots-lines line indicates the variation of delivery flow of pump 1 that varies till a value that is lower with respect to maximum value of condition of figures 1 and 2 .
  • the invention may furthermore be directed to a method for controlling a pump system 1 as described, comprising the following phases:
  • the pump system 1, the regulation means 15 and/or the firefighting mixture generation system comprising pump system 1 may comprise a control unit comprising elaboration means configured to execute automatically the aforementioned phases of the control method.
  • the volume of delivery flow may be adjusted without varying the crankshaft speed. Therefore, the provided pump may be controlled in a very thin way in every speed range of the crankshaft to provide a requested delivery flow.
  • a firefighting mixture system provided with such pump may be controlled in simpler way and provide a very wide range of delivery flow value.
  • more pairs of pistons may be present instead of a single pair of pistons.
  • crankshaft system may comprise a different leverismo between crankshaft and the piston.
  • check valves may be substituted by other equivalent means and the shape of housing 2 may vary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
EP23157172.0A 2022-02-18 2023-02-17 Pumpensystem für ein feuerlöschmischungserzeugungssystem Active EP4230267B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102022000003083A IT202200003083A1 (it) 2022-02-18 2022-02-18 Sistema di pompa per un sistema di generazione di miscela antincendio

Publications (3)

Publication Number Publication Date
EP4230267A1 true EP4230267A1 (de) 2023-08-23
EP4230267C0 EP4230267C0 (de) 2024-12-04
EP4230267B1 EP4230267B1 (de) 2024-12-04

Family

ID=81385033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23157172.0A Active EP4230267B1 (de) 2022-02-18 2023-02-17 Pumpensystem für ein feuerlöschmischungserzeugungssystem

Country Status (3)

Country Link
EP (1) EP4230267B1 (de)
ES (1) ES2997838T3 (de)
IT (1) IT202200003083A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2160687A (en) * 1936-11-02 1939-05-30 Gen Electric Plural motor control system
US2430917A (en) * 1944-01-07 1947-11-18 Herman H Curry Control for synchronized pump motors
DE2317905A1 (de) * 1973-04-10 1974-10-24 Hauhinco Maschf Vorrichtung zur erzeugung eines druckmittelstromes
EP1095673A2 (de) * 1999-10-25 2001-05-02 Lenzing Technik GmbH & CO. KG Zumischeinrichtung für Feuerlöschanlagen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2160687A (en) * 1936-11-02 1939-05-30 Gen Electric Plural motor control system
US2430917A (en) * 1944-01-07 1947-11-18 Herman H Curry Control for synchronized pump motors
DE2317905A1 (de) * 1973-04-10 1974-10-24 Hauhinco Maschf Vorrichtung zur erzeugung eines druckmittelstromes
EP1095673A2 (de) * 1999-10-25 2001-05-02 Lenzing Technik GmbH & CO. KG Zumischeinrichtung für Feuerlöschanlagen

Also Published As

Publication number Publication date
IT202200003083A1 (it) 2023-08-18
EP4230267C0 (de) 2024-12-04
ES2997838T3 (en) 2025-02-18
EP4230267B1 (de) 2024-12-04

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