EP3590593A1 - Zerlegbare mischvorrichtung und flüssigkeitsmischverfahren - Google Patents

Zerlegbare mischvorrichtung und flüssigkeitsmischverfahren Download PDF

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Publication number
EP3590593A1
EP3590593A1 EP18182202.4A EP18182202A EP3590593A1 EP 3590593 A1 EP3590593 A1 EP 3590593A1 EP 18182202 A EP18182202 A EP 18182202A EP 3590593 A1 EP3590593 A1 EP 3590593A1
Authority
EP
European Patent Office
Prior art keywords
tank
liquids
hose
mixing
pump unit
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.)
Withdrawn
Application number
EP18182202.4A
Other languages
English (en)
French (fr)
Inventor
Marten Karlsson
Wei Yang
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.)
Sandvik Mining and Construction Australia Production Supply Pty Ltd
Original Assignee
Sandvik Mining and Construction Australia Production Supply Pty Ltd
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 Sandvik Mining and Construction Australia Production Supply Pty Ltd filed Critical Sandvik Mining and Construction Australia Production Supply Pty Ltd
Priority to EP18182202.4A priority Critical patent/EP3590593A1/de
Publication of EP3590593A1 publication Critical patent/EP3590593A1/de
Withdrawn legal-status Critical Current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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
    • B01F33/5014—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use movable by human force, e.g. kitchen or table devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive

Definitions

  • the present invention relates to a mixing device for mixing liquids in a tank of a mobile machinery equipment, and in particular, although not exclusively, to a portable mixing device for mixing a concentrated fire fighting agent diluted with other liquids of a fire suppression system.
  • Concentrated fire fighting agent diluted/mixed with water or other liquids is used within the fire suppression system in mobile machinery equipments, e.g., diesel powered mobile equipment or mining machines. It is common practice to mix the concentrated agent with water when the solution is filled into the fire suppression tank of the mobile equipment.
  • the fire suppression system is pressurized and then either the tank is shaken or the motion of the mobile equipment during operation is used to stir the liquids together to complete the mixing.
  • a portable mixing tool with retractable blade/propeller is inserted into the tank to stir the liquids by the rotation of the blade/propeller.
  • a dismountable mixing device for mixing at least two liquids inside a tank of a mobile machinery equipment.
  • the mixing device comprises a pump unit, a suction hose, and a return hose.
  • the pump unit has an inlet port and an outlet port.
  • the suction hose has one end connected to the inlet port of the pump unit, and a sucking end inserted into the tank through a first opening.
  • the return hose has one end connected to the outlet port of the pump unit, and a returning end inserted into the tank through a second opening.
  • the pump unit is driven to suck the liquids from the tank via the suction hose, and return the liquids back to the tank via the return hose.
  • the pump unit is detachably mounted to the tank.
  • the pump unit is dismounted, and the suction hose and return hose are removed from the tank of the mobile machinery equipment.
  • the mixing device is then ready to be used on other tanks of other equipments.
  • the pump unit comprises a shaft driven pump, and a shaft of the shaft driven pump is driven by a rotational tool.
  • the rotational tool comprises a drill that rotates the shaft of the pump with a predetermined rotational speed to allow a liquid to be able to flow through the pump, and thus through the suction hose and return hose, and circulate in the tank.
  • the liquid flow through the pump is equal to or is greater than 40L/min
  • the predetermined rotational speed is equal to or is greater than 2000rpm
  • the drill drives the shaft to rotation for at least one minute, that is, the liquids are mixed for a minimum time of one minute.
  • the sucking end of the suction hose is inserted to be near the bottom of the tank, and the returning end of the return hose is inserted to be below and near the top level of the liquids in the tank, to allow for a thorough circulation/rotation of the liquids in the tank.
  • the mixing device further includes a flow control element located on the outlet port of the pump or in the return hose.
  • the flow control element controls the flow velocity on the returning end of the return hose to be higher than the flow velocity on the sucking end of the suction hose.
  • a diameter of the return hose is smaller than a diameter of the suction hose, to allow for a higher flow velocity on the returning end of the return hose.
  • the volume of liquid returned to the returning end will agitate the liquid in the tank sufficiently with a higher liquid flow velocity.
  • the return hose is a transparent hose to enable the operator to monitor whether the liquids in the tank is fully mixed.
  • the liquids mixed by the mixing device can be used in a fire suppression system of a mobile machinery equipment, so that the fire suppression system may provide better fire suppression performance with sufficiently mixed fire fighting agent.
  • a liquid mixing system used for a mobile machinery equipment, the liquid mixing system comprises a tank, a dismountable mixing device and a rotational tool.
  • the tank holds a mixture of at least two liquids.
  • the dismountable mixing device is used for mixing the liquids inside the tank.
  • the rotational tool drives the pump unit of the mixing device, so as to mix the liquids in the tank.
  • the dismountable mixing device comprises a pump unit, a suction hose, and a return hose.
  • the pump unit has an inlet port and an outlet port.
  • the suction hose has one end connected to the inlet port of the pump unit, and a sucking end inserted into the tank through a first opening.
  • the return hose has one end connected to the outlet port of the pump unit, and a returning end inserted into the tank through a second opening.
  • the pump unit is driven by the rotational tool to suck the liquids from the tank via the suction hose, and return the liquids back to the tank via the return hose.
  • a liquid mixing method for initial mixing of at least two liquids inside a tank of a mobile machinery equipment.
  • the mixing method comprises: connecting a suction hose to an inlet port of a pump unit, and inserting the suction hose through a first opening on the tank; connecting a return hose to an outlet port of the pump unit, and inserting the return hose through a second opening on the tank; driving the pump unit to suck the liquids from the tank via the suction hose, and to return the liquids back to the tank via the return hose; and removing the suction hose and the return hose from the tank after the initial mixing.
  • the step of driving the pump unit includes: driving a shaft driven pump of the pump unit by using a rotational tool that has a rotational speed of at least 2000rpm; and driving the pump for at least one minute, to allow the mixing of the liquids to be fully and sufficiently.
  • the liquid mixing method further includes: controlling the flow velocity in the return hose to be higher than the flow velocity in the suction hose, so that the volumn of liquids returned to the returning end of the return hose agitates the liquid in the tank sufficiently with a higher liquid flow velocity.
  • the step of inserting the suction hose includes inserting a sucking end of the suction hose near the bottom of the tank, and the step of inserting the return hose includes inserting a returning end of the return hose below and near the top level of the liquids in the tank, this is to allow for a thorough circulation/rotation of the liquids in the tank.
  • the liquid mixing method further includes: mounting the pump unit to the tank for the initial mixing; and dismounting the pump unit after the initial mixing.
  • the suction hose and return hose are also removed from the tank after the initial mixing, and thus the pump unit and hoses are ready to be used on other tanks of other equipments.
  • FIG. 1 is a perspective view of a dismountable mixing device 100 according to a specific implementation of the present invention.
  • FIG. 2 is a partially exploded perspective view of the mixing device 100 of FIG. 1 .
  • the dismountable mixing device 100 comprises a pump unit 10, a suction hose assembly 12 and a return hose assembly 14 connected to the pump unit 10.
  • the pump unit 10 has an inlet port 26 connected to the suction hose assembly 12, and an outlet port 28 connected to the return hose assembly 14.
  • the suction hose assembly 12 includes a suction hose 22, and the return hose assembly 14 includes a return hose 24, in operation, both hoses are inserted into a tank of a fire suppression system for a mining machine.
  • the operator/worker first fills the tank of the fire suppression system, e.g. of a mining machine, with water to a correct level, and then adds a required amount of concentrated fire agent, the concentrated fire agent having a higher density than water.
  • the concentrated fire agent and water need to be fully mixed to become a homogeneous solution in suspension, and for which the homogeneity is maintained over its lifetime.
  • the dismountable mixing device 100 is thus fit onto the tank for mixing. After the liquids inside the tank are fully mixed, the mixing device 100 is removed, and the fire suppression system is pressurized.
  • the hoses can be transparent.
  • the return hose 24 is a transparent hose such that when the mixing device 100 is mixing the liquids inside the tank 30, the transparent return hose 24 enables the operator to monitor the status of the mixed liquids, so as to decide if it is fully mixed.
  • the pump unit 10 of the mixing device 100 includes a pump 20 having a shaft 21 that can be driven by a portable rotational tool (not shown).
  • the pump 20 can be driven to rotate by the rotational tool with a predetermined rotational speed to allow a liquid to be able to flow through the pump 20, so that the liquids run from the sucking end 23 of the suction hose 22 to the returning end 25 of the return hose 24, and it runs for a minimum period of time to ensure that the mixing is complete and that the liquids become a homogeneous solution.
  • the pump unit 10 can be removed from the tank.
  • the suction hose assembly 12 and the return hose assembly 14 are also detached from the tank.
  • FIG. 3 is a liquid mixing system 300 that includes the mixing device 100 of FIG. 1 according to a specific implementation of the present invention.
  • FIG. 4 is a perspective view of the liquid mixing system 300 in FIG. 3 where the rotational tool 36 is a drill 40 according to a specific implementation of the present invention.
  • the liquid mixing system 300 includes the tank 30, the dismountable mixing device 100 and the rotational tool 36.
  • the rotational tool 36 drives the pump unit 10 of the mixing device 100, so as to mix the liquids in the tank 30.
  • the tank 30 holds a mixture of at least two liquids, and on the top surface of the tank 30, there are at least two openings, a first opening 31 and a second opening 32.
  • One of the openings 31 and 32 can be the pressure relief bung opening, and the other one is a top center hole on the tank 30.
  • the suction hose 22 is inserted into the tank 30 via the first opening 31 and the return hose 24 is inserted into the tank 30 via the second opening 32.
  • the sucking end 23 of the suction hose 22 is located near to the bottom of the tank 30, and the returning end 25 of the return hose 24 is located below and near the top level of the liquids inside the tank 30, to allow circulation/rotation of the whole volume of liquids in the tank 30.
  • the sucking end 23 of the suction hose 22 may have cut outs at the tip to reduce the risk of the tip being sucked to the bottom of the tank 30.
  • a diameter of the return hose 24 is configured to be smaller than a diameter of the suction hose 22, so that the liquid flow velocity on the returning end 25 of the return hose 24 is controlled to be higher than that on the sucking end 23 of the suction hose 22.
  • the diameter of the return hose 24 can be 10mm smaller than the diameter of the suction hose 22.
  • a flow control element (not shown) is configured on the outlet port 28 of the pump 20 or in the return hose 24, so as to control the liquid flow velocity on the returning end 25 to be higher than that on the sucking end 23.
  • an orifice, or other type of flow restrictor or flow restricting valve can be located on the outlet port 28 of the pump 20.
  • the pump unit 10 can be fastened to the first opening 31 by a fastening means after the suction and return hoses 22 and 24 are inserted into the tank 30.
  • the pump unit 10 includes a swivel nut 32 to be tightened to the first opening 31 of the tank 30.
  • the swivel nut shall not be a limitation to the present invention, and in other embodiments, various types of fastening means can be applied to this invention. Since it is well know by the skilled person in the art, the fastening means will not be elaborated in this application.
  • the portable rotational tool 36 can be a handheld drill 40 used to drive the pump 20 of the pump unit 10 when the mixing device 100 is mounted on the tank 30.
  • the pump 20 is a shaft driven pump, and the drill 40 is applied to rotate the pump shaft 21 with a predetermined rotational speed to allow the liquid to flow through the pump 20.
  • the pump flow rate of over 20L/min is required to suck the viscous concentrate into the pump. If the flow is not high enough, the pump will only re-circulate water and leave the concentrate unmixed in the bottom of the tank.
  • the handheld drill 40 drives the shaft driven pump 20 with a rotational speed of 2000rpm, or drives the pump 20 with a pump flow of 40L/min.
  • liquids filling a tank with a volumn of 110L will be fully mixed by having the pump driven to rotate for one minute.
  • the tank has a lower volumn, e.g., 25L, 45L, 80L etc., smaller rotational speed and shorter rotation time for mixing may be required.
  • FIG. 5 is a process of liquid mixing method 500 for mixing liquids in a tank 30 of a fire suppression system according to a specific implementation of the present invention.
  • the liquid mixing method 500 includes the following steps:
  • the pump unit 10 includes a pump 20 having a shaft 21 that can be driven by a portable rotational tool 36 to perform the initial mixing.
  • Step 53 driving the pump unit 10 to suck the liquids from the tank 30 via the suction hose 22, and returning the liquids back to the tank 30 via the return hose 24.
  • the pump 20 is driven to rotate by the rotational tool 36 with a predetermined rotational speed to allow a liquid to be able to flow through the pump 20, the liquids run from the sucking end 23 of the suction hose 22 to the returning end 25 of the return hose 24.
  • the mixing needs to run for a minimum period of time to ensure the mixing is complete and the liquids becomes a homogeneous solution.
  • the hoses can be transparent.
  • the return hose 24 is a transparent hose, so that the operator can observe the fluid in the return hose 24, to decide whether the liquids are adequately mixed, e.g., if the returning fluid is in a uniform milky color.
  • the step 53 further includes driving the shaft driven pump 20 of the pump unit 10 by using the rotational tool 36 that has a rotational speed of at least 2000rpm; and driving the pump 20 for at least one minute.
  • the rotational tool 36 is a handheld drill 40 with a rotational speed of 2000rpm, or that the pump 20 is driven with a pump flow of 40L/min.
  • the mixing method further controls the flow velocity in the return hose 24 to be higher than the flow velocity in the suction hose 22, so that the volume of liquid returned to the returning end 25 will agitate the liquid in the tank 30 sufficiently with a higher liquid flow velocity.
  • Step 54 removing the suction hose 22 and the return hose 24 from the tank 30 after the initial mixing.
  • the liquid mixing method further includes mounting the pump unit 10 to the tank for initial mixing. When the initial mixing is performed and the liquids is fully mixed, the pump unit 10 is dismounted from the tank 30, and the suction hose assembly 12 and the return hose assembly 14 are removed from the system as well.
  • initial mixing can be performed sufficiently without being affected by the small openings on the tank.
  • different suction hoses and return hoses can be chosen to meet the dimensional requirements of the tanks, as long as the sucking end of the suction hose can be inserted to be near the bottom of the tank, and the returning end of the return hose can be inserted to be below and near the top level of the liquids in the tank.
EP18182202.4A 2018-07-06 2018-07-06 Zerlegbare mischvorrichtung und flüssigkeitsmischverfahren Withdrawn EP3590593A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18182202.4A EP3590593A1 (de) 2018-07-06 2018-07-06 Zerlegbare mischvorrichtung und flüssigkeitsmischverfahren

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18182202.4A EP3590593A1 (de) 2018-07-06 2018-07-06 Zerlegbare mischvorrichtung und flüssigkeitsmischverfahren

Publications (1)

Publication Number Publication Date
EP3590593A1 true EP3590593A1 (de) 2020-01-08

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EP18182202.4A Withdrawn EP3590593A1 (de) 2018-07-06 2018-07-06 Zerlegbare mischvorrichtung und flüssigkeitsmischverfahren

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059583A (en) * 1961-06-27 1962-10-23 John E Huber Liquid lifter pump
US3816035A (en) * 1972-10-24 1974-06-11 E Malbec Peristaltic pump
JPS54174064U (de) * 1978-05-29 1979-12-08
DE3934175C1 (en) * 1989-10-13 1991-05-02 Procter & Gamble Gmbh, 6231 Schwalbach, De Solid raw material melting appts. for perfumes mfr. - has container arranged inside microwave chamber and combined with stirrer
US5066428A (en) * 1990-08-08 1991-11-19 Rusmar Incorporated Foam generating apparatus
FR2824753A1 (fr) * 2001-05-17 2002-11-22 Commissariat Energie Atomique Procede et dispositif de mise en circulation d'une mousse dans une installation
US20030201340A1 (en) * 2002-03-15 2003-10-30 Hanson John D. Fluid sprayer with a motor-driven pump
US20150217264A1 (en) * 2012-08-28 2015-08-06 Tsukishima Kikai Co., Ltd. Continuous processing device
US20160074818A1 (en) * 2014-09-11 2016-03-17 Flowserve Management Company Diaphragm pump with improved tank recirculation
US20160279451A1 (en) * 2014-08-01 2016-09-29 Leonard E. Doten Aircraft firefighting tank with mixing

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059583A (en) * 1961-06-27 1962-10-23 John E Huber Liquid lifter pump
US3816035A (en) * 1972-10-24 1974-06-11 E Malbec Peristaltic pump
JPS54174064U (de) * 1978-05-29 1979-12-08
DE3934175C1 (en) * 1989-10-13 1991-05-02 Procter & Gamble Gmbh, 6231 Schwalbach, De Solid raw material melting appts. for perfumes mfr. - has container arranged inside microwave chamber and combined with stirrer
US5066428A (en) * 1990-08-08 1991-11-19 Rusmar Incorporated Foam generating apparatus
FR2824753A1 (fr) * 2001-05-17 2002-11-22 Commissariat Energie Atomique Procede et dispositif de mise en circulation d'une mousse dans une installation
US20030201340A1 (en) * 2002-03-15 2003-10-30 Hanson John D. Fluid sprayer with a motor-driven pump
US20150217264A1 (en) * 2012-08-28 2015-08-06 Tsukishima Kikai Co., Ltd. Continuous processing device
US20160279451A1 (en) * 2014-08-01 2016-09-29 Leonard E. Doten Aircraft firefighting tank with mixing
US20160074818A1 (en) * 2014-09-11 2016-03-17 Flowserve Management Company Diaphragm pump with improved tank recirculation

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