EP2908929A1 - Dispositif pour mélanger des composés agricoles - Google Patents

Dispositif pour mélanger des composés agricoles

Info

Publication number
EP2908929A1
EP2908929A1 EP13801803.1A EP13801803A EP2908929A1 EP 2908929 A1 EP2908929 A1 EP 2908929A1 EP 13801803 A EP13801803 A EP 13801803A EP 2908929 A1 EP2908929 A1 EP 2908929A1
Authority
EP
European Patent Office
Prior art keywords
mixing
frequency
product
previous
mixing chamber
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
EP13801803.1A
Other languages
German (de)
English (en)
Other versions
EP2908929B1 (fr
Inventor
Cristian VEZZOSI
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2908929A1 publication Critical patent/EP2908929A1/fr
Application granted granted Critical
Publication of EP2908929B1 publication Critical patent/EP2908929B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F21/00—Dissolving
    • B01F21/20—Dissolving using flow mixing
    • B01F21/22—Dissolving using flow mixing using additional holders in conduits, containers or pools for keeping the solid material in place, e.g. supports or receptacles
    • 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
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2111—Flow rate
    • 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
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2214—Speed during the operation
    • B01F35/22141—Speed of feeding of at least one component to be mixed
    • 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
    • B01F35/71—Feed mechanisms
    • B01F35/714—Feed mechanisms for feeding predetermined amounts
    • B01F35/7141—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames
    • B01F35/71411—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames rotating or oscillating about an axis
    • B01F35/714111—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames rotating or oscillating about an axis the measuring chambers being pockets on the circumference of a drum rotating about a horizontal axis with discharging by gravity
    • 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
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/882—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances
    • B01F35/8821—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances involving controlling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/04—Mixing biocidal, pesticidal or herbicidal ingredients used in agriculture or horticulture, e.g. for spraying

Definitions

  • the present invention relates to a device for mixing agricultural compounds, meaning a device that can mix two or more products in such a way as to obtain an agricultural compound.
  • the compounds mixed by the device according to the present invention may be, by way of example, fertilizers, plant protection products or the like.
  • a similar device to that of the present invention may also be used to mix food products, pharmaceuticals, detergents or the like.
  • Such devices comprise a tank in which the substances to be mixed are deposited, for example, water and a powdered plant protection product.
  • a mixer is placed in the tank, so as to exert a mixing action that makes the mixture uniform.
  • a dispensing conduit is connected in fluid communication with the tank.
  • a hydraulic pump is placed in communication with the tank and with the conduit, so as to maintain a pre-established pressure within such conduit to promote the dispensing of the mixed compound, for example, on a cultivated field.
  • the need to mix the product within the tank constitutes a strong limitation to the use of devices of the prior art. It is, in fact, necessary to estimate the total quantity of product to be dispensed before mixing. Usually this quantity is a function of the dimensions of the field, the type of product, the mixing percentage and the type of crop. It is usual for such a quantity to be estimated in excess, therefore some mixed product remains in the tank after the spraying of the field. The remaining product must be stored according to special procedures, which prevent the dispersion of the product into the environment.
  • the technical task underpinning the present invention is to provide a device for mixing agricultural compounds which obviates the drawbacks of the prior art as cited above.
  • the object of the present invention is to provide a device for mixing agricultural compounds which can mix a suitable but not excessive quantity of compound for the user requirements.
  • the set technical task and specified aims are substantially attained by a device for mixing agricultural compounds comprising the technical characteristics set out in one or more of the appended claims.
  • FIG. 1 is a front sectional view of a device for mixing agricultural compounds according to the present invention
  • FIG. 1 is a lateral sectional view of the device of Figure 1 ;
  • FIG. 3 is a block diagram representative of the operation of the device of Figures 1 and 2.
  • the device 1 indicates a device for mixing agricultural products according to the present invention.
  • the device 1 according to the present invention is able to mix a first and a second product so as to obtain a mixed agricultural compound.
  • the first and the second product may be fluids (in the liquid or gaseous state), semi-fluids (for example a paste or a gel) or incoherent solids (for example powder or granules).
  • the first and the second product may not be uniform, but in turn be a pre-established mixture of further products.
  • the device 1 may mix any number of products, if the type of specific application requires it.
  • the device 1 comprises an inlet conduit 2 of the mentioned first product which may be, by way of example, water or another solvent in liquid form. Furthermore the device 1 comprises an outlet conduit 3 of the mixed compound. Such outlet conduit 3 is placed in fluid communication with the inlet conduit 2.
  • Dispensing means may be connected to the outlet conduit 3, so as to directly use the mixed compound. Such dispensing means are not illustrated, since they are not part of the present invention.
  • the device 1 comprises at least one mixing chamber 4 associated with the inlet 2 and outlet 3 conduits.
  • the mixing chamber 4 is switchable between a picking position and a mixing position.
  • the mixing chamber 4 in the picking position the mixing chamber 4 is filled with a predetermined dose of the second product to be mixed with the mentioned first product.
  • the mixing chamber 4 is placed in fluid communication with a source 5 of second product.
  • second product may be, by way of example, a powdered fertilizer or a plant protection product for agricultural use.
  • the mixing chamber 4 is placed in fluid communication with the inlet 2 and outlet 3 conduits, so as to effectively operate the mixing of the first and the second product, and obtain a mixed agricultural compound.
  • the first product enters the mixing chamber 4 previously filled with the second product, becoming mixed with it and producing the mixed agricultural product.
  • Such agricultural compound therefore flows through the already mentioned outlet conduit 3.
  • the device 1 further comprises movement means 6 of the mixing chamber 7, which can move it at least between the picking and mixing positions with a frequency "f". Note that, given a flow rate of the first product that crosses the inlet conduit 2, the concentration of the second product in the mixed compound will be directly proportional to the frequency with which the mixing chamber 4 alternates between the picking and mixing positions.
  • the device 1 comprises a mixing organ 7 which has an axis of rotation "A".
  • the mixing organ 7 is rotatable about the axis of rotation "A”, and has a central zone 7a, proximal to the axis of rotation "A", and a peripheral, more external, zone 7b.
  • the mixing chamber 4 is in particular afforded in the peripheral zone 7b of the mixing organ. In this way, the rotation of the mixing organ 7 about the axis of rotation "A" performs the switching of the mixing chamber 4 between the mentioned picking and mixing positions.
  • the movement means 6 comprise a motor 8 connected to the mixing organ 7 so as to make it rotate with a rotational speed (Vr) about the axis of rotation "A".
  • the motor 8 is of the hydraulic type and, preferably, is regulated by a hydraulic circuit valve (neither shown in the attached figures). The opening of such valve corresponds to a proportional increase in the rotational speed (Vr).
  • the motor 8 is an electric motor.
  • the mixing organ 7 has a discoidal shape, and the axis of rotation "A" passes through its centre.
  • the mixing organ 7 is arranged between two clamp discs 10, 12, which have the function of locking it within the device 1 and, simultaneously, allowing its rotation about an axis of rotation "A".
  • the mixing organ 7 is in contact with such discs 10, 12.
  • the device 1 comprises a support frame 9, inside which the mentioned inlet 2 and outlet 3 conduits are afforded.
  • the discs 10, 12 are supported by the frame 9.
  • the discs 10, 12 are stacked up vertically and, in particular, are arranged coaxially between each other.
  • the device 1 comprises an upper disc 0, and a lower disc 12, between which the mixing organ 7 is arranged.
  • the movement means 6 comprise a shaft 13, arranged parallel to the axis of rotation "A". More particularly, the shaft 13 rotates about the axis of rotation "A”.
  • the mixing organ 7 is fitted onto such shaft 13, so as to be mixed in rotation by the motor 8 through the shaft 3.
  • the discs 10, 12 have respective central zones 10a, 12a and peripheral zones 10b, 12b. As shown for example in Figure 1 , the central zones 10a, 12a each have a respective through hole 14. The shaft 13 is inserted in the holes 14. Note that the upper disc 10 and the lower one 12 are not fitted onto the shaft 13 and, consequently, the mixing organ 7 rotates with respect to them.
  • the upper disc 10 has a through opening 15, in particular at its own peripheral zone 10b.
  • Such opening 15 is substantially placed at the same distance from the axis of rotation "A" of the mixing chamber 4. Consequently, with the rotation of the mixing organ 7, the mixing chamber 4 transits at such opening 15, in particular when it is in the picking position.
  • the second product is in fact inserted into the mixing chamber 4 through such opening 15, in particular from a hopper 16 placed at the opening 15. The second product passes from the hopper 16 to the mixing chamber 4 by gravity, in particular until the complete filling of the mixing chamber 4.
  • the lower disc 12 has a further through opening 17, which is also placed substantially at the same distance from the axis of rotation "A" of the mixing chamber 4, but at a different angular position with respect to the opening 15 of the upper disc 10.
  • the mixing chamber transits at the further opening 17 and enters into fluid communication therewith when it is in the mixing position.
  • the inlet conduit 2 is in fact oriented in the direction of the further opening 17, so as to direct towards it a flow of first product, in particular through a nozzle 18.
  • the mixing chamber 4 transits at the further opening 17, the flow of first product enters the mixing chamber 4 and becomes mixed with the first product.
  • the resulting compound then passes out of the nozzle 18, and then flows into the outlet conduit 3.
  • the mixing chamber 4 still contains residues of first product and/or second product and/or mixed compound.
  • the mixing chamber 4 is switchable into a discharge position, wherein it is in fluid communication with the outlet conduit 3 and with a vent 19.
  • the discharge conduit 20 is afforded within the lower disc 12 and placed in fluid communication with the outlet conduit 3.
  • the discharge conduit 20 is placed substantially at the same distance from the axis of rotation "A" of the mixing chamber 4.
  • the vent 19 is afforded on the upper disc 10, in particular in the same angular position as the discharge conduit 20. Consequently, when the mixing chamber 4 passes into the discharge position it enters into fluid communication with the vent 19 and with the discharge conduit 20.
  • the mixing chamber 4 then pours its contents into the discharge conduit 20, and is emptied before passing into the picking position.
  • a presser organ 21 keeps the discs 10, 12 in close contact with the mixing organ 7, so as to prevent any leakage between them.
  • a presser organ 21 may be a spring, arranged coaxially with respect to the shaft 13.
  • the presser organ 21 may comprise a plurality of grips (not illustrated).
  • the device 1 comprises a sensor 22 associated with the inlet conduit 2.
  • a sensor 22 is configured to detect a signal "S1 " representative of a flow rate of first product in the inlet conduit 2.
  • the sensor 22 is a flow meter.
  • the sensor 22 may be of the turbine, vane, nutating disc or electromagnetic type.
  • the device 1 comprises a processing unit 23 associated with the sensor 22 and with said movement means 6 of the mixing chamber 4.
  • processing unit 23 is presented as being split into distinct functional modules (storage modules or operative modules) for the sole purpose of describing its functionalities clearly and completely.
  • this processing unit 23 can comprise a single electronic device, appropriately programmed to perform the functionalities described, and the different modules can correspond to hardware entities and/or routine software that are part of the programmed device.
  • such functionalities can be performed by a plurality of electronic devices on which the aforementioned functional modules can be distributed.
  • the processing unit 23 can also make use of one or more processors for performing the instructions contained in the storage modules.
  • the aforementioned functional modules can, also, be distributed on different calculators locally or remotely based on the architecture of the network in which they reside.
  • the processing unit 23 comprises a reading module 24 configured to acquire a value "Q" of the mentioned signal "S1".
  • the reading module 24 acquires such value "Q” in digital form.
  • the value "Q" may be kept in analog form.
  • the processing unit 23 further comprises a control module 25 configured to obtain a target value "fO" of the switching frequency "f of the mixing chamber 4 as a function of the mentioned value "Q".
  • the control module 25 is able, as a function of the value "Q" detected of the flow rate of first product within the inlet conduit 2, to calculate the corresponding frequency value "f" (i.e. the number of steps of the mixing chamber 4 in the unit of time) necessary in order for the mixing percentage between the first and the second product to be kept constant.
  • control module 25 is configured to obtain the target value "fO" of frequency “f” in a directly proportional way to the value "Q".
  • calculation module 25 is configured in order to calculate the target value "fO” by multiplying the value "Q" of the signal "S1" by a pre-established gain "G".
  • the processing unit 23 further comprises an operative module 26, configured to activate the movement means 6 and therefore to vary the frequency T as a function of the target value "fO".
  • the operative module 26 is associated with the motor 8, and is able to increase and/or decrease the revolutions of the motor 8 as a function of the target value "fO" of frequency "f".
  • the operative module 26 is configured to vary the rotational speed "Vr" of the motor 8 as a function of the target value "fO" of frequency "f".
  • the operative module 26 is configured to increase the frequency "f", in particular the revolutions of the motor 8, in the event that such frequency "f" is less than the target value "fO". Likewise, the operative module 26 is configured to reduce the frequency "f in the event that the frequency "f is higher than the target value "fO". In other words, the operative module 26 is configured to pursue the target value "fO".
  • the operative module 26 is configured to send a control signal "U" to the motor 8.
  • a control signal "U” is representative of a target rotational speed "VO" of the motor 8. Note that the target rotational speed "VO" is directly proportional to the target frequency "fO".
  • the processing unit 23 is further configured to calculate the mentioned gain "G" as a function of a pre-established parameter "c" to be inserted by a user.
  • a parameter "c” is in particular representative of a mixing ratio between the first and the second product.
  • the processing unit 23 comprises an interface module "27" configured to enable a user to insert such a parameter "c".
  • interface module 27 may comprise a monitor or a keyboard, a knob or equivalent devices.
  • the present invention reaches the proposed object. Since the mixing is performed at the same time as the dispensing of the product mixed by the outlet conduit, only the amount of compound effectively needed is produced, avoiding the problems connected with excess mixing.
  • the processing unit is able to guarantee a suitable mix for varying the incoming amount of first product, guaranteeing the effectiveness of the mixing device in a wide interval of values of such flow rate.
  • the user further has the possibility to select the mixing ratio and, once it has been selected, the device can keep it constant.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Accessories For Mixers (AREA)
  • Catching Or Destruction (AREA)

Abstract

L'invention concerne un dispositif (1) pour mélanger des produits agricoles, comprenant un conduit d'entrée (2) d'un premier produit ; un conduit de sortie (3) d'un produit mélangé en communication fluidique avec le conduit d'entrée (2) ; une chambre de mélange (4) ; un moyen de mouvement (6) de la chambre de mélange (4) pour la déplacer entre des positions de prélèvement et de mélange avec une fréquence (f) ; un capteur (22) pour détecter un débit du premier produit dans le conduit d'entrée (2) ; une unité de traitement (23) comprenant un module de lecture (24) configuré pour acquérir une valeur de débit (Q) du premier produit, un module de commande (25) configuré pour obtenir une valeur cible (f0) de fréquence (f) en fonction de la valeur (Q), un module de fonctionnement (26) configuré pour activer le moyen de mouvement (6) et faire varier la fréquence (f) en fonction de la valeur cible (f0).
EP13801803.1A 2012-10-17 2013-10-16 Dispositif pour mélanger des composés agricoles Active EP2908929B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001756A ITMI20121756A1 (it) 2012-10-17 2012-10-17 Dispositivo di miscelazione per composti agricoli
PCT/IB2013/059401 WO2014060969A1 (fr) 2012-10-17 2013-10-16 Dispositif pour mélanger des composés agricoles

Publications (2)

Publication Number Publication Date
EP2908929A1 true EP2908929A1 (fr) 2015-08-26
EP2908929B1 EP2908929B1 (fr) 2016-05-11

Family

ID=47471909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13801803.1A Active EP2908929B1 (fr) 2012-10-17 2013-10-16 Dispositif pour mélanger des composés agricoles

Country Status (7)

Country Link
EP (1) EP2908929B1 (fr)
DK (1) DK2908929T3 (fr)
ES (1) ES2586502T3 (fr)
IT (1) ITMI20121756A1 (fr)
PL (1) PL2908929T3 (fr)
PT (1) PT2908929T (fr)
WO (1) WO2014060969A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104094713B (zh) * 2014-07-08 2016-04-20 重庆科技学院 自动变量施肥系统及其控制方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3318641A (en) * 1965-02-26 1967-05-09 Possis Machine Corp Metering means
US3366367A (en) * 1965-03-05 1968-01-30 Kamyr Ab Apparatus for mixing of bleaching agents into cellulosic pulp
SE426536B (sv) * 1981-06-12 1983-01-31 Gunnar Wensman Sett for utfodring av djur, foretredesvis fisk, varvid foder medelst en luftstrom och via ett fodermatarorgan infores i en ledning och varvid fodret transporteras till ett eller flera utfodringsstellen - samt even anord
FR2668949B1 (fr) * 1990-11-09 1993-08-06 Sedia Sarl Dispositif d'injection de granules dans un courant de fluide a debit assez eleve et son application a la distribution de granules a des animaux.
ITRE20100026A1 (it) * 2010-03-25 2011-09-26 Andrea Manzini Miscelatore per polveri, liquidi o gas in uno o piu' circuiti in pressione di liquidi o gas

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014060969A1 *

Also Published As

Publication number Publication date
ITMI20121756A1 (it) 2014-04-18
PL2908929T3 (pl) 2016-12-30
PT2908929T (pt) 2016-08-08
DK2908929T3 (en) 2016-08-22
ES2586502T3 (es) 2016-10-14
EP2908929B1 (fr) 2016-05-11
WO2014060969A1 (fr) 2014-04-24

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