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EP4629817A1 - Systèmes de distribution de liquide pour pulvérisateurs pour cultures - Google Patents

Systèmes de distribution de liquide pour pulvérisateurs pour cultures

Info

Publication number
EP4629817A1
EP4629817A1 EP23805160.1A EP23805160A EP4629817A1 EP 4629817 A1 EP4629817 A1 EP 4629817A1 EP 23805160 A EP23805160 A EP 23805160A EP 4629817 A1 EP4629817 A1 EP 4629817A1
Authority
EP
European Patent Office
Prior art keywords
chemicals
nozzle
tank
arrangement
flow
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.)
Pending
Application number
EP23805160.1A
Other languages
German (de)
English (en)
Inventor
Todd Brandon SNYDER
Joseph Paul ANDERSON
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.)
AGCO Corp
Original Assignee
AGCO Corp
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 AGCO Corp filed Critical AGCO Corp
Publication of EP4629817A1 publication Critical patent/EP4629817A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • A01M7/0089—Regulating or controlling systems
    • A01M7/0092—Adding active material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B01F23/451—Mixing liquids with liquids; Emulsifying using flow mixing by injecting one liquid into another
    • 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
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • 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
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/421—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
    • B01F25/423—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components
    • B01F25/4231—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components using baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2486—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device with means for supplying liquid or other fluent material to several discharge devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/16—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
    • B05B1/169—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets having three or more selectively effective outlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B05B12/006—Pressure or flow rate sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet

Definitions

  • Embodiments of the present disclosure relate to mobile chemical application machines, such as self-propelled sprayers and similar vehicles. More particularly, embodiments relate to liquid distribution systems for applying chemicals.
  • a common design for a self-propelled crop sprayer includes a chassis with a tank, boom arms, and nozzles connected to the boom arms.
  • the tank contains liquid product such as fertilizers, pesticides, fungicides, and/or herbicides.
  • Boom arms extend outward from the sides of the chassis.
  • Boom plumbing contains supply lines and nozzles spaced apart along the length of the boom arms at a spacing distance corresponding to the spray pattern of the nozzles.
  • the length of conventional boom arms may vary from, for example, 6 meters (18 feet) up to 46 meters (150 feet), but shorter or longer booms are possible.
  • the boom arms typically swing in for on-road transport and out for field-spraying operations.
  • the nozzles are connected in series such that the product flows through a pipe and/or hose from one nozzle to another.
  • Booms have been of the "wet boom” type, where the boom comprises a frame member with a pipe mounted thereon, where the liquid passes through the pipe into nozzles mounted on the pipe and liquidly connected thereto, or a “dry boom” type, where the nozzles are mounted to the frame member and liquid passes to the nozzles through a hose which is connected between the nozzles.
  • the nozzles are attached to the pipe or frame with brackets at desired intervals along the boom arm.
  • the product may be flushed through the pipe or hose to each nozzle to fill the entire plumbing system with the product. This may help to remove air bubbles and ensure that any prior products are purged from the system. To avoid uneven distribution of the product, this flushing and purging process may be performed before the sprayer enters the planted area of the field. This process may dispense several gallons of product out of the boom to ensure that all of the air is out of the boom and that liquid product can consistently and evenly be dispensed from each of the nozzles.
  • a liquid distribution system for a crop sprayer, comprising: a main tank for containing a carrier liquid; a chemicals tank for containing chemicals to be mixed with the carrier liquid; a set of outlet nozzles carried by a boom; a first conduit arrangement for transferring the carrier liquid from the main tank to the outlet nozzles; a second conduit arrangement for transferring chemicals from the chemicals tank to the outlet nozzles; a main pump for delivering the carrier liquid from the main tank to the set of outlet nozzles via the first conduit arrangement; and a chemicals pump arrangement for delivering chemicals from the chemicals tank to the set of outlet nozzles via the second conduit arrangement.
  • Each outlet nozzle comprises a mixing unit for locally mixing the content of the main tank and chemicals delivered to the outlet nozzle.
  • This liquid distribution system enables chemicals to be injected at each nozzle on the boom. This saves time to ensure the boom is primed with chemical as well as making sure the whole boom is outputting the correct chemical mixture.
  • the second conduit arrangement is for example primed without waste by using a return line. In use, chemical will reach the exit of the outlet nozzle when only the small volume within the outlet nozzle (between the mixing unit and the nozzle exit) is primed. Thus, the outlet nozzles can be prepared to dispense the correct chemical composition with little waste. Different mixture amounts may be provided to different outlet nozzles, and different boom sections may be defined where chemical is applied.
  • a “conduit arrangement” is used to denote a set or network of fluid connections and optionally also valves or other control elements, and is thus not intended to be limited to a single fluid conduit.
  • the main tank is typically for containing water.
  • the chemicals pump arrangement may be a single pump at the outlet of a single chemical tank, individual pumps at the outlets of each chemical tank (if there is more than one chemical tank), or a set of individual pumps at the outlet nozzles for the chemicals flow.
  • Each outlet nozzle for example may comprise: a nozzle body having an inlet to which the first conduit arrangement connects and an exit nozzle; and a shutoff valve between the inlet and the exit nozzle, with the mixing unit between the nozzle body and the shutoff valve.
  • the shutoff valve is between in the inlet and the exit nozzle in terms of the flow path (rather than a specific physical location).
  • the nozzle body and shutoff valve may for example be existing parts of a standard design.
  • the system may thus be implemented by inserting mixing units as a retrofit to existing designs, to which the second conduit arrangement is connected.
  • the shutoff valve is for example a spring shutoff valve or an electric or air shutoff valve.
  • the mixing unit for example comprises a coaxial tube having a first (e.g., outer) bore between the inlet and an input to the shutoff valve and a second (e.g., inner) bore between an output from the shutoff valve and the exit nozzle.
  • the first bore carries the water flow from the main tank towards the shutoff valve and the second bore carries the water flow from the shutoff valve (when it is open) to the exit nozzle.
  • the first bore is for example the outer bore, and the second conduit arrangement terminates in the first bore (so chemical is added to the flow towards the shutoff valve) or the second conduit arrangement terminates in the second bore (so chemical is added to the flow out of the shutoff valve).
  • the system may comprise a first flow meter for measuring the flow along the first conduit arrangement from the main tank and a second flow meter for measuring the flow along the second conduit arrangement from the chemicals tank.
  • the flow of the main tank content (e.g., water) and the chemicals flow are monitored, and the two flows are distributed at an even rate to the nozzles.
  • the system may comprise a plurality of nozzle flow meters for measuring the chemicals flow along the second conduit arrangement to the individual outlet nozzles.
  • the amount of chemical delivered to individual outlet nozzles, or to groups of outlet nozzles may be monitored.
  • different chemical mixtures may be provided to different outlet nozzles if desired.
  • multiple raw chemicals may be pumped out to the boom (or multiple booms) and injected into the carrier (water) at each outlet nozzle.
  • FIG. 1 illustrates an agricultural vehicle in the form of a self-propelled crop sprayer
  • FIG. 2 illustrates a portion of the agricultural vehicle of FIG. 1 including a boom and part of an application system
  • FIG. 3 shows a first view of a liquid delivery nozzle
  • FIG. 4 shows a second view of the liquid delivery nozzle of FIG. 3
  • FIG. 5 shows a first example of a mixing unit which can be applied to the liquid delivery nozzle of FIG. 3 and FIG. 4;
  • FIG. 6 shows a second example of a mixing unit which can be applied to the liquid delivery nozzle of FIG. 3 and FIG. 4;
  • FIG. 7 shows a first example of the flow paths in the liquid delivery system using the mixing units of FIG. 5 and FIG. 6;
  • FIG. 8 shows a second example of the flow paths in the liquid delivery system using the mixing units of FIG. 5 and FIG. 6;
  • FIG. 9 shows a third example of the flow paths in the liquid delivery system using the mixing units of FIG. 5 and FIG. 6;
  • FIG. 10 shows a first example of a baffle arrangement
  • FIG. 11 shows a second example of a baffle arrangement
  • FIG. 12 shows a third example of a baffle arrangement
  • FIG. 13 shows a towed crop sprayer
  • This disclosure provides a liquid distribution system for a crop sprayer, comprising a main tank (e.g., for water) and a chemicals tank.
  • a set of outlet nozzles is carried by a boom.
  • a main pump delivers the content from the main tank to the set of outlet nozzles and a chemicals pump (or set thereof) delivers chemicals from the chemicals tank to the set of outlet nozzles.
  • Each outlet nozzle comprises a mixing unit for locally mixing the content of the main tank and chemicals delivered to the outlet nozzle. By locally performing the mixing, purging the system is simplified.
  • FIG. 1 shows a crop sprayer 102 used to deliver chemicals to agricultural crops in a field.
  • the crop sprayer 102 includes a chassis 104 and an operator cab 106 mounted on the chassis 104.
  • the operator cab 106 may house controls for the crop sprayer 102.
  • An engine 108 may be mounted on a forward portion of the chassis 104 in front of operator cab 106 or may be mounted on a rearward portion of the chassis 104 behind the operator cab 106.
  • the engine 108 may be commercially available from a variety of sources and may include, for example, a diesel engine or a gasoline-powered internal combustion engine, a battery-powered electric motor, etc.
  • the engine 108 provides energy to propel the crop sprayer 102 through a field on wheels or tracks, and may also provide energy to spray liquids from the crop sprayer 102.
  • the crop sprayer 102 further includes a product tank 110 to store a liquid to be sprayed on the field.
  • the liquid may include chemicals, such as but not limited to, herbicides, pesticides, fungicides, and/or fertilizers.
  • the product tank 110 may be mounted on the chassis 104, either in front of or behind the operator cab 106.
  • the crop sprayer 102 may include more than one product tank 110 to store different chemicals to be sprayed on the field. The stored chemicals may be dispersed by the crop sprayer 102 one at a time, or different chemicals may be mixed and dispersed together in a variety of mixtures.
  • a boom 112 on the crop sprayer 102 is used to distribute the liquid from the product tank 110 over a wide swath as the crop sprayer 102 is driven through the field.
  • the boom 112 may include two or more portions that can fold for transport on public roadways, and unfold (i.e., to the position shown in FIG. 1) for field operations.
  • FIG. 2 is a simplified perspective view of a portion of the boom 112.
  • Liquid is conveyed from the product tank 110 (FIG. 1) by a liquid distribution system 202 to various outlet nozzles 204 carried by and spaced along the boom 112.
  • the liquid distribution system 202 which may be mounted on the boom 112, includes at least one supply line and, optionally, a recirculation line connected to the product tank 110. Recirculation of liquid to the product tank 110 may be useful for purging lines when changing products without wasting product onto the ground or damaging crops with excess product. In some embodiments, the recirculation line may be omitted, and the liquid distribution system 202 can be purged at a shop or mixing plant, where liquid can be captured, such as on a catch pad.
  • FIG. 3 shows a flow control device which is present at each outlet nozzle 204.
  • the flow control device comprises a main body 300 having an inlet 302 for receiving the flow from the liquid distribution system 202.
  • the liquid passes to a shutoff valve 304 which is used to start and stop the spraying from that nozzle. When the shutoff valve is open, the flow returns to the main body 300 where it connects to an exit nozzle 306.
  • the exit nozzle 306 is one of five possible exit nozzles which can be rotated into position by means of a rotary head 307. In this way, the spray pattern can be selected by rotating a suitable one of the exit nozzles into operation.
  • the flow to and from the shutoff valve 304 is in this example a coaxial arrangement, with an inner flow path in one direction and an outer flow path in the opposite direction.
  • the liquid is delivered to the outlet nozzle 204 by a pump.
  • the pump creates sufficient pressure to deliver flow to all the nozzles.
  • FIG. 4 shows another view of the flow control device.
  • the mixing takes place locally at the nozzle.
  • the inlet 302 is used only for the flow of water (although any another carrier may be used with which other chemicals are to be mixed).
  • a main pump delivers the content from the main tank to the set of outlet nozzles and a chemicals pump delivers chemicals from the chemicals tank to the set of outlet nozzles.
  • a mixing unit is provided at each outlet nozzle for locally mixing the main tank content and the chemicals delivered to the outlet nozzle.
  • the liquid distribution system enables chemicals to be injected at each nozzle on the boom. This saves time ensuring the boom is primed with chemical as well as making sure the whole boom is outputting the correct chemical mixture. Chemical will reach the exit of the outlet nozzle when only the small volume within the outlet nozzle (between the mixing unit and the exit nozzle) is primed. Thus, it can be ensured that the outlet nozzles are ready to dispense the correct chemical composition with little waste.
  • FIG. 5 shows a first example of the mixing unit 400. It comprises a coaxial tube having a first, outer, bore 402 between the inlet and an input to the shutoff valve and a second, inner, bore 404 between an output from the shutoff valve and the exit nozzle.
  • the flow is thus along the outer bore 402 to the shutoff valve as represented by flow arrow 410 and it is along the inner bore 404 to the exit nozzle as represented by arrow 412.
  • the outer bore 402 carries the water flow from the main tank towards the shutoff valve and the inner bore carries the water flow from the shutoff valve (when it is open) to the exit nozzle.
  • the chemical is delivered to the inner bore (so chemical is added to the flow out of the shutoff valve) by conduits 420.
  • FIG. 6 shows an alternative where the chemical is delivered to the outer bore (so chemical is added to the flow into the shutoff valve).
  • the nozzle body and shutoff valve may for example be existing parts of a standard design such as shown in FIG. 3 and FIG. 4.
  • the system may thus be implemented by inserting mixing units as a retrofit to existing designs, and the chemicals tank is coupled to the mixing units to provide the delivery of chemical.
  • FIG. 7 shows in simplified form a first example of a set of possible fluid connections.
  • a main tank 500 is for storing water (or other carrier) and a first conduit arrangement 502 is used to transfer water from the main tank to the outlet nozzles 504.
  • the first conduit arrangement 502 for example comprises a flow splitter for splitting a combined flow to the separate nozzles 504.
  • a chemicals tank 510 is for containing chemicals to be mixed with the content (water or other carrier) of the main tank 500.
  • a second conduit arrangement 512 is for transferring chemicals from the chemicals tank to the outlet nozzles 504.
  • the second conduit arrangement 512 for example also comprises a flow splitter for splitting a combined flow to the separate nozzles 504.
  • a main pump 520 is used to deliver the content from the main tank to the set of outlet nozzles 504 via the first conduit arrangement 502, and in this example a single chemicals pump 522 is used to deliver chemicals from the chemicals tank 510 to the set of outlet nozzles 504 via the second conduit arrangement 512.
  • the mixing unit locally at the outlet nozzles 504 performs the mixing of the main tank content and chemicals delivered to the outlet nozzle 504.
  • a first flow meter 530 is provided for measuring the flow along the first conduit arrangement 502 from the main tank 500 and a set of second flow meters 532 is provided for measuring the flow along the second conduit arrangement 512 reaching each nozzle 504 from the chemicals tank 510.
  • the pumps 520, 522 are set to enable a desired mixing ratio and flow rate to be implemented at the nozzles 504.
  • the flow of chemicals i.e., the chemical concentrate
  • the pump 522 near the chemicals tank 510 and monitored by flow meters 532 at each nozzle mixer.
  • the flow meters 532 are used to tell the operator if the flow is correct or incorrect. Incorrect flow could be the result of a blockage, a broken line, etc.
  • FIG. 8 shows in simplified form a second example of a set of possible fluid connections.
  • the flow of the chemical concentrate is controlled by pumps 540 in each line to the nozzle mixers. This would allow the pump outputs to be adjusted based on the flow rate seen at the flow meters 532.
  • FIG. 9 shows in simplified form a third example of a set of possible fluid connections.
  • Flow of the chemical concentrate is controlled by a single pump 522 near the chemicals tank 510 and regulators or valves 550 in each line to the nozzle mixers.
  • the valves or regulators 550 can then control the flow from the pressurized line though the flow meter 532 to the nozzle mixer.
  • a single flow meter may be used at the outlet of the chemicals tank, in the same way as is shown for the first, water, conduit arrangement 502.
  • the flow is distributed at an even rate to the nozzles so that overall flow monitoring, using individual flow meters 530 and 532 may thus be sufficient.
  • individual flow meters as shown in the examples above, the amount of chemical delivered to individual outlet nozzles, or to groups of outlet nozzles, may be monitored so that suitable control actions may be taken. Different chemical mixtures may be provided to different outlet nozzles if desired.
  • FIG. 5 and FIG. 6 each show a set of four conduits 420 leading to the mixing unit 400. These represent outputs from four chemical tanks 510, so that different chemical tanks 510 may be plumbed to different nozzles 504 or multiple chemicals may be provided to all nozzles 504. Thus, multiple raw chemicals may be pumped out to the boom (or multiple booms) and injected into the carrier (water) at each outlet nozzle 504 or at selected outlet nozzles 504.
  • the system may have flow return lines (for the water and for the chemicals) with check valves so that a recirculation mode is enabled.
  • the nozzles 504 may or may not be spraying liquid onto the field when the liquid distribution system is in recirculation mode, depending on the pressure at each nozzle 504.
  • the nozzles 504 may for example spray liquid only when pressure at the nozzles 504 is above a threshold.
  • the recirculation function is used to prime the liquid distribution system to apply a new liquid, to clean out the liquid distribution system after use, and/or to ensure consistent mixing throughout a liquid application process.
  • FIG. 10 shows a first example of a baffle arrangement 600 within the inner bore 404 and for a design with the second conduit arrangement terminating at the outer bore.
  • the top image is a perspective view and the bottom image shows hidden detail.
  • the baffle arrangement comprises a series of semi-circular discs that are angularly offset relative to each other (e.g., by 180 degrees) and sloped relative to the perpendicular to the elongate axis of the bore.
  • FIG. 11 shows a second example of a baffle arrangement 610 within the inner bore 404 and again for a design with the second conduit arrangement terminating at the outer bore.
  • the top image is a perspective view and the bottom image shows hidden detail.
  • the baffle arrangement comprises a series of semi-circular discs that are spaced along the bore and angularly offset relative to each other (e.g., by 180 degrees) and are perpendicular to the elongate axis of the bore.
  • FIG. 12 shows a third example of a baffle arrangement 620 within the outer bore 402 and for a design with the second conduit arrangement terminating at the outer bore.
  • the top image is a perspective view and the bottom image shows hidden detail.
  • the baffle arrangement comprises a series of semi-circular discs that are angularly offset relative to each other (e.g., by 180 degrees) and sloped relative to the perpendicular to the elongate axis of the bore.
  • FIG. 13 shows another crop sprayer 702 that may be used to deliver chemicals to agricultural crops in a field.
  • the crop sprayer 702 is a pull-type sprayer including a chassis 704 carrying product tanks 706.
  • the crop sprayer 702 has a hitch 708 configured to couple the chassis 704 to a tractor 710.
  • the tractor 710 may therefore pull the crop sprayer 702 through the field, and the operator of the tractor 710 may also operate the crop sprayer 702 via a control system in the cab of the tractor 710.
  • the boom 112 may have arms that fold for road transport (partially folded boom arms indicated by dashed lines in FIG. 13).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Catching Or Destruction (AREA)

Abstract

Un système de distribution de liquide est prévu pour un pulvérisateur pour cultures, ledit système comprenant un réservoir principal (par exemple, pour de l'eau ou un autre support) et un réservoir de produits chimiques. Un ensemble de buses de sortie est porté par une flèche. Une pompe principale distribue le contenu du réservoir principal à l'ensemble de buses de sortie et une pompe de produits chimiques distribue des produits chimiques du réservoir de produits chimiques à l'ensemble de buses de sortie. Chaque buse de sortie comprend une unité de mélange pour mélanger localement le contenu du réservoir principal et les produits chimiques distribués à la buse de sortie. En effectuant localement le mélange, la purge du système est simplifiée.
EP23805160.1A 2022-12-09 2023-11-02 Systèmes de distribution de liquide pour pulvérisateurs pour cultures Pending EP4629817A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202263386829P 2022-12-09 2022-12-09
PCT/IB2023/061041 WO2024121643A1 (fr) 2022-12-09 2023-11-02 Systèmes de distribution de liquide pour pulvérisateurs pour cultures

Publications (1)

Publication Number Publication Date
EP4629817A1 true EP4629817A1 (fr) 2025-10-15

Family

ID=88779191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23805160.1A Pending EP4629817A1 (fr) 2022-12-09 2023-11-02 Systèmes de distribution de liquide pour pulvérisateurs pour cultures

Country Status (3)

Country Link
EP (1) EP4629817A1 (fr)
AU (1) AU2023391432A1 (fr)
WO (1) WO2024121643A1 (fr)

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Publication number Priority date Publication date Assignee Title
GB976578A (en) * 1962-02-28 1964-11-25 Hayes Spray Gun Company Improvements in or relating to mixing apparatus
FR2964047B1 (fr) * 2010-08-31 2015-05-22 Exel Ind Ensemble de pulverisation et pulverisateur equipe d'au moins un tel ensemble
WO2012092482A1 (fr) * 2010-12-29 2012-07-05 Agco Corporation Système d'injection à buse à orifices multiples
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