WO2019175853A1 - Dispositif de dosage - Google Patents

Dispositif de dosage Download PDF

Info

Publication number
WO2019175853A1
WO2019175853A1 PCT/IB2019/052181 IB2019052181W WO2019175853A1 WO 2019175853 A1 WO2019175853 A1 WO 2019175853A1 IB 2019052181 W IB2019052181 W IB 2019052181W WO 2019175853 A1 WO2019175853 A1 WO 2019175853A1
Authority
WO
WIPO (PCT)
Prior art keywords
substance
fact
electric motor
rotor element
control unit
Prior art date
Application number
PCT/IB2019/052181
Other languages
English (en)
Inventor
Lorenzo SCARPONI
Original Assignee
Scarponi Lorenzo S.R.L.
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 Scarponi Lorenzo S.R.L. filed Critical Scarponi Lorenzo S.R.L.
Publication of WO2019175853A1 publication Critical patent/WO2019175853A1/fr

Links

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
    • 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
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers

Definitions

  • This invention relates to a dosing device.
  • a first type of known device is a volumetric doser provided with a positive displacement pump, e.g. with pistons, and with a hopper in which the substance to be dosed is deposited.
  • the positive displacement pump is connected to the hopper by means of a dosing valve.
  • the dosing valve has a container sized on the basis of the quantity of substance to be dosed and has an opening adapted to put the container in communication with the hopper to receive the substance to be dosed and with the positive displacement pump to transport/store/package the substance taken.
  • the dosing valve in fact, is rotatable between a taking position, wherein the opening is communicating with the hopper, and a delivery position, wherein the opening is communicating with the positive displacement pump and the hopper is closed.
  • the positive displacement pump can convey the substance present in the container.
  • This first type of device has some drawbacks.
  • the device in fact, is very complex to make and not very flexible in case one wishes to vary the quantities to be dosed.
  • the regulation of the quantities in fact, is of the mechanical type and depends on the type of valve chosen, on the container size and on the positive displacement pump size.
  • this first type of device providing for the drop by gravity of the substances from the hopper, is inconvenient for particularly dense substances.
  • a second type of known device is peristaltic dosers.
  • the peristaltic dosers comprise a flexible hose which is adapted to be crushed and released in order to create pressure variations adapted to suck and convey the substances to be dosed.
  • This second type of device also has some drawbacks.
  • a first drawback is related to the low head which these devices are provided with, so peristaltic devices are not suitable when high suction pressures are required.
  • a second drawback is related to the dosage accuracy, since peristaltic dosers do not always manage to suck the same quantity of substance, but have some “blind spots” that make the dosage imprecise.
  • the main aim of the present invention is to devise a dosing device that allows simplifying the dosing operations of various types of substances.
  • One object of the present invention is to devise a dosing device that allows a quick adjustment of the speed and quantity of the substance to be dosed.
  • Another object of the present invention is to devise a dosing device that is easy to implement.
  • a further object of the present invention is to devise a dosing device that is easy to clean.
  • Another object of the present invention is to devise a dosing device that allows overcoming the aforementioned drawbacks of the prior art in a simple, rational, easy, effective to use and cost effective solution.
  • Figure 1 is an axonometric view of a first embodiment of the device according to the invention.
  • Figure 2 is a cross-sectional view of the device according to the invention.
  • Figure 3 is an axonometric view of a second embodiment of the device according to the invention.
  • reference numeral 1 globally indicates a dosing device.
  • the device 1 comprises a single screw pump, indicated with reference numeral 2, provided with a pump body 3 extending along a substantially longitudinal direction of extension and having an inlet opening 4 and an outlet opening 5 for the inlet and the outlet of a substance to be dosed.
  • the pump body 3 comprises a head portion 3 a and an extreme portion 3b opposite the head portion 3a.
  • the pump body 3 comprises a lateral portion 3c.
  • the inlet opening 4 is formed on the lateral portion 3c.
  • the substance enters the pump body 3 according to a direction which is substantially transverse with respect to the direction of extension of the pump body itself.
  • the inlet opening 4 can be connected to a tank containing a substance to be taken and dosed.
  • the configuration shown allows for greater flexibility in positioning the device 1 with respect to the tank.
  • the outlet opening 5 is usefully obtained at the head portion 3 a.
  • the pump body 3 shown therefore, benefits the transport of substance and is more practical to install and because the positions of the inlet opening 4 and of the outlet opening 5 allow better management and better control of the loading and unloading operations.
  • the pump 2 is also provided with a rotor element 6 inserted in the pump body 3 adapted to transport the substance to be dosed.
  • the rotor element 6 is of the type of a helical eccentric screw, normally used in the single screw pumps known to the state of the art.
  • the pump 2 is then provided with a stator element 7 inserted in the pump body 3 and associated with the rotor element 6 for the transport of the substance to be dosed.
  • stator element 7 is of the type of a rubber cylinder that covers a portion of inner surface of the pump body 3.
  • the stator element 7 surrounds the rotor element 6 and defines with it some variable volume chambers depending on the position of the rotor element 6.
  • the device 1 preferably comprises at least one valve element 8 positioned at the outlet opening 5.
  • the valve element 8 has the function of preventing the outflow of the substance at the end of dosage, thus avoiding the dripping from the outlet opening 5.
  • valve element 8 is usefully of the type of a pneumatic valve, but the use of different valve elements, such as solenoid valves, peristaltic valves or other technically equivalent and well-known state of the art valves, cannot be ruled out.
  • the device 1 comprises at least one electric motor 9 with electronically controlled position which is associated with the pump 2 for motion transmission to the rotor element 6 and for the dosage of controlled quantities of the substance.
  • the electric motor 9 comprises a shaft 10 the position of which with respect to the axis of rotation is electronically controlled.
  • This feature allows determining the quantity of substance to be delivered by making a simple control of the engine revolutions.
  • the electric motor 9 is selected out of one of the following: a“brushless” motor or a“stepper” motor.
  • the electric motor 9 is of the type of an asynchronous motor with an encoder installed for rpm control.
  • the device 1 usefully comprises at least one two way joint 11 associated with the rotor element 6 and with the electric motor 9.
  • the two way joint 11 is adapted to kinematically connect the rotor element 6 to the electric motor 9.
  • the two way joint 11 is of the type of a threaded cylinder having a first extremity 1 la screwed onto the rotor element 6 and a second extremity 1 lb associated with the electric motor 9.
  • the second extremity l lb is screwed onto the shaft 10 of the electric motor 9.
  • the device 1 comprises at least one control unit 12 associated with the electric motor 9 for the predefined regulation of the position of the electric motor 9.
  • the control unit 12 controls the rpm and the position of the shaft 10 of the electric motor 9 in order to be able to deliver a predefined quantity of substance.
  • the control unit 12 comprises a driver adapted to drive the shaft 10 of the electric motor 9.
  • control unit 12 comprises processing means which are able to correlate the number of revolutions to the quantities of substance transported for different types of substance.
  • the device 1 comprises an interface unit 13 operatively connected to the control unit 12 and adapted to receive setting information, such as e.g. rpm and speed, by a user.
  • setting information such as e.g. rpm and speed
  • a user can interact with the interface unit 13 to set the number of revolutions and the speed of the shaft of the electric motor 9 in order to determine a corresponding quantity of substance to be delivered.
  • the interface unit 13 is usefully of the type of a device with a“touch screen” monitor, but solutions wherein the interface unit 13 is of the type of analog devices operatively connected to the control unit 12 cannot be ruled out.
  • the device 1 comprises a programming unit 14 which is operatively connected to the control unit 12 and to the interface unit 13.
  • the programming unit 14 is adapted to program the control unit 12 using the setting information described above.
  • the programming unit 14 is usefully of the type of a programmable logic controller (PLC), but alternative solutions, such as microcontrollers or other programming systems, cannot be ruled out.
  • PLC programmable logic controller
  • a user enters setting information via the interface unit 13 into the programming unit 14 or directly into the control unit 12.
  • the user determines the rpm related to the quantity of substance to be dosed and the speed of rotation of the motor, or directly determines the quantity of substance to be dosed.
  • the rpm can be set directly or indirectly, for example by choosing the quantity of substance to be dosed.
  • the programming unit 14 conveys the setting information to the control unit 12.
  • the control unit 12 starts the electric motor 9, controlling its position and speed.
  • the electric motor 9, through the two way joint 11, drives the rotor element 6 in motion.
  • the rotor element 6 exerts a suction action through the inlet opening 4 and, in combination with the stator element 7, a thrust action towards the outlet opening
  • the dosage of the substance starts with setting the electric motor 9 in rotation and ends when the same motor stops.
  • valve element 8 prevents the residual substance to flow out.
  • the device 1 is completely similar to what is described in the first embodiment and differs from it by the fact that it comprises a motor body 15 comprising the electric motor 9, the control unit 12, the interface unit 13 and the programming unit 14.
  • the electric motor 9, the control unit 12, the interface unit 13 and the programming unit 14 are incorporated into a single motor body 15, thus making the device 1 more compact and easily transportable.
  • the device 1 is completely similar to what is described in the first and second embodiments and differs from these by the fact that the control unit 12 comprises the programming unit 14.
  • control unit 12 is of the type of a microcontroller having a driver adapted to drive the electric motor 9.
  • the device 1 is completely similar to what was described in the previous embodiments and differs from them by the fact that the interface unit 13 comprises the control unit 12 and the programming unit 14. The operation of the fourth embodiment is completely similar to that already illustrated for the previous embodiments.
  • the devised dosing device facilitates the dosing operations of liquid and dense substances such as honey, creams, or substances such as oils or other similar substances.
  • the suction capacity of the single screw pump allows having a self-priming dosing device, so that the use of the gravity force is no longer required to transport the substance to be dosed, as required, on the contrary, in the first type of dosing devices known to the state of the art.
  • the devised dosing device moreover, thanks to the connection of the electric motor to the control unit, to the interface unit and to the programming unit, allows a quick regulation of the speed and of the quantity of the substance to be dosed.
  • the user simply by setting the parameters in the interface unit, can electronically vary the quantities to be dosed and the transport speed according to the type of substance, without having to intervene mechanically.
  • the devised dosing device is simple to make, easy to assemble and disassemble.
  • This feature facilitates the operations required for cleaning the various components, making the dosing device easy and quick to clean.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Surgical Instruments (AREA)
  • Vehicle Body Suspensions (AREA)
  • Radiation-Therapy Devices (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

Le dispositif de dosage (1) comprend une seule pompe à vis (2) comportant : - un corps de pompe (3) s'étendant le long d'une direction d'extension sensiblement longitudinale et présentant une ouverture d'entrée (4) et une ouverture de sortie (5) pour l'entrée et la sortie d'une substance devant être dosée; - un élément de rotor (6) inséré dans le corps de pompe (3) adapté à transporter la substance devant être dosée; - un élément de stator (7) inséré dans le corps de pompe (3) et associé à l'élément de rotor (6) pour le transport de la substance devant être dosée; au moins un moteur électrique (9) doté d'une position à commande électronique qui est associée à la pompe (2) pour la transmission de mouvement à l'élément de rotor (6) et pour le dosage de quantités commandées de la substance.
PCT/IB2019/052181 2018-03-16 2019-03-18 Dispositif de dosage WO2019175853A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000003690 2018-03-16
IT102018000003690A IT201800003690A1 (it) 2018-03-16 2018-03-16 Dispositivo dosatore

Publications (1)

Publication Number Publication Date
WO2019175853A1 true WO2019175853A1 (fr) 2019-09-19

Family

ID=62530434

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/052181 WO2019175853A1 (fr) 2018-03-16 2019-03-18 Dispositif de dosage

Country Status (2)

Country Link
IT (1) IT201800003690A1 (fr)
WO (1) WO2019175853A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009069064A1 (fr) * 2007-11-27 2009-06-04 Koninklijke Philips Electronics N.V. Dispositif implantable de distribution d'une substance thérapeutique
US20100054976A1 (en) * 2008-08-27 2010-03-04 Sander Dollner Eccentric screw pump
WO2015144570A1 (fr) * 2014-03-26 2015-10-01 Continental Automotive Gmbh Procédé pour faire fonctionner une pompe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009069064A1 (fr) * 2007-11-27 2009-06-04 Koninklijke Philips Electronics N.V. Dispositif implantable de distribution d'une substance thérapeutique
US20100054976A1 (en) * 2008-08-27 2010-03-04 Sander Dollner Eccentric screw pump
WO2015144570A1 (fr) * 2014-03-26 2015-10-01 Continental Automotive Gmbh Procédé pour faire fonctionner une pompe

Also Published As

Publication number Publication date
IT201800003690A1 (it) 2019-09-16

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