Classifications

• • 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
  • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
  • B05B1/3013—Lift valves
• • 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
• • 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
  • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
  • B05B1/3093—Recirculation valves, i.e. the valve element opens a passage to the nozzle and simultaneously closes at least partially a return passage the feeding means
• • 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
  • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
  • B05B1/3006—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the controlling element being actuated by the pressure of the fluid to be sprayed
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
  • B05B15/20—Arrangements for agitating the material to be sprayed, e.g. for stirring, mixing or homogenising
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
  • B05B15/40—Filters located upstream of the spraying outlets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
  • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
  • B05B15/58—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter preventing deposits, drying-out or blockage by recirculating the fluid to be sprayed from upstream of the discharge opening back to the supplying means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
  • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
  • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
  • B05B15/658—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits the spraying apparatus or its outlet axis being perpendicular to the flow conduit
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
  • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
  • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
  • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
  • B05B9/0423—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material for supplying liquid or other fluent material to several spraying apparatus

Definitions

• the present invention relates generally to valve controlled spraying systems, and more particularly, to an improved valve system for controlling the liquid flow to spray nozzles during operation and upon shutoff of a liquid supply.
• Agricultural sprayers typically have long spray booms with groups of spray nozzles that are selectively controlled by respective control valves, each of which is individually actuated to permit transmission or termination of liquid to the spray nozzles of the group. Termination of liquid to one or more groups of spray nozzles frequently is necessary, for example, near the ends of fields so as to prevent spraying on non-crop vegetation or the like.
• the control valves for such spraying systems commonly are mounted in ganged or manifolded side-by-side relationship with respect to each other and remote from the spray nozzles they control. Each control valve is provided with a valve element that is movable between open and closed positions to selectively control the flow of liquid to the spray nozzles of the respective group.
• Control valves which includes a rotatable ball valve that is rotatable between a one position that enables the direction of pressurized liquid through the control valve to the liquid supply line to the spray nozzle or groups of spray nozzles and a second position which closes a liquid inlet port of the valve and redirects remaining downstream liquid in the line to a return line for recirculation to a liquid supply tank.
• the liquid inlet port does not completely close prior to opening of a port to the return line, which results in spurts of high pressure liquid through the control valve prior to complete closure of the inlet port.
• Another object of the present invention to provide a valve controlled spraying system as characterized above that is operable for shutting off the liquid supply to the spray nozzles without unwanted bursts of liquid through the control valve that can affect the accurate monitoring of chemical usage.
• a further object is to provide a valve controlled spraying system of the above kind having a liquid supply control valve operable for completely shutting of liquid supply to the spray nozzles prior to enabling the direction of downstream liquid in spray nozzle feed lines to a return line to the liquid supply.
• Another object is to provide a valve controlled system of the above kind which is relatively simple in construction and operation and lends itself to economical manufacture and reliable usage.
• FIGURE 1 is a schematic diagram of an illustrative spraying system having control valves in accordance with the present invention
• FIG. 2 is an enlarged fragmentary section of one of the spray nozzle assemblies and its associated check valve included in the spraying system shown in FIG. 1, showing the check valve in a closed position;
• FIG. 3 is an enlarged fragmentary section of the illustrated check valve, showing the check valve in an open position
• FIG. 4 is an enlarged vertical section of one of the illustrated control modules taken in a plane perpendicular to a central liquid port of the control module showing the valve stem thereof in an open position for communicating liquid from the central liquid supply port to an outlet port of the control valve;
• FIG. 5 is a vertical section, similar to FIG. 4, but showing the valve stem in a lowered position which blocks the flow of liquid from the liquid supply port to an outlet port to the spray nozzles while opening a flowback or return port communicating with a return line;
• FIG. 6 is a vertical section of the control module shown in FIG. 5 taken in a plane perpendicular to that of FIG. 5;
• FIG. 7 is a partial section of the control module, similar to FIG. 4, showing the valve stem in an open position permitting communication of liquid through an outlet port to spray nozzles;
• FIG. 8 is a figure similar to FIG. 7, but showing the valve stem in an intermediate position blocking the flow of liquid to both the liquid outlet port to the spray nozzles and to the flowback or return port of the module;
• FIG. 9 is a partial section similar to FIGS. 5 and 6, showing the valve stem in a lowered position blocking the flow of liquid through the inlet port and permitting the return flow of liquid to a flowback or return port;
• FIG. 9A is an enlarged blow up of the lower valve stem in FIG. 9;
• FIG. 10 is an enlarged perspective of the electric motor and valve stem drive of the illustrated control module
• FIG. 11 is an enlarged horizontal section of the control module taken in the plane of line 11-11 in FIG. 7;
• FIG. 12 is a side elevational view of the electric motor and valve stem drive of the illustrated control module.
• FIG. 13 is a section of the motor and valve stem drive taken in the plane of line 13-13 in FIG. 12.
• FIG. 1 of the drawings there is shown an illustrative agricultural spraying system 10 which includes a supply tank 11 for containing a quantity of liquid to be sprayed, a plurality of spray sections 12 each having a plurality of spray nozzles 14 through which liquid is discharged, and a group of spray control valves 15 in accordance with the invention which are mounted in a ganged or manifolded side-by-side relationship with respect to each other and are adapted to control the flow of liquid from the supply tank 11 to the spray sections 12.
• the spraying system 10 is similar to that disclosed in the above referenced U.S. patent 6,036,107, the disclosure of which is incorporated herein by reference.
• the spraying system 10 includes a supply line 18 between the supply tank 11 and the group of control valves 15 for transmitting liquid to the control valves 15, a discharge line 19 between each control valve 15 and a respective spray section 12 for delivering liquid to the spray section 12, a return line 20 that provides return communication between the control valves 15 and the supply tank 11, and a regulation line 21 having a regulation valve 22 between the group of control valves 15 and the supply tank 11 for facilitating regulation of the system pressure.
• the supply line 18 of the illustrated spraying system 10 includes a shut-off valve 24 which permits manual flow stoppage of liquid from the supply tank 11, a pump 25 which pressurizes liquid in the supply line 18, a strainer 26 for filtering debris from the supply line 18, and a throttling valve 28 which permits manual regulation of flow.
• the supply line 18 also includes a return line 29 which, in this case, branches off from the supply line 18 at a point downstream of the pump 25 and returns to the supply tank 11. As shown in FIG. 1, this return line 29 includes an agitator 30 located within the supply tank 11 which mixes the liquid within the supply tank 11 based upon the flow rate through the return line 29.
• a throttling valve 31 also is provided in the return line 29 which may be manually adjusted to regulate the flow rate through the return line 20 and to adjust the mixing rate of the agitator 30.
• the illustrated spraying system 10 is provided with a computer operated sprayer control 35 which is operatively connected to each of the control valves 15 of the group and the regulating valve 22, in a known manner.
• the illustrated spray nozzles 14, as depicted in FIGS. 2 and 3, may be of conventional type, in this case each having a nozzle body 38 with a stem 39 supported in fluid communication with a liquid supply boom 40 of the spray section 12, which in turn is coupled to a respective supply line 19.
• the spray nozzles 14 each have a have a respective check valve 41, such as disclosed in commonly assigned US patent 4,660,598, the disclosure of which is incorporated herein by reference.
• the pressurized liquid urges a diaphragm 45 away from an upstream end 46 of an inlet tube 48 as shown in FIG.
• the spring 42 forces the diaphragm into sealing engagement with the upstream end of the tube 48 so as to prevent further liquid from discharging or dripping from the spray nozzle 14.
• the control valves 15 of the spray sections 12 each have a modular construction and are mounted in ganged or manifold relation in a manner similar to that disclosed in the above referenced US patent 6,036,107.
• the control valves 15, as shown in FIGS. 4-6 each have a main valve body 50, a lower valve body 51 supported in depending relation to the main valve body 50, and an electric valve control motor 52 supported on top of the main valve body 50.
• the main valve body 50 in this case has an upwardly opening annular collar 54 that receives and supports an annular mounting section 55 of a housing of the motor 52 with an annular sealing rings 56 there in between, and the lower valve body 51 has an upwardly extending reduced diameter hub section 58 supported within a lower end of the main valve body 50 with sealing O-ring 59 therebetween.
• the main valve body 50 includes a central transversely oriented main liquid supply port 60 for receiving liquid from the supply line 18, and the lower valve body 51 has a central vertical liquid passage 62 for communication with the liquid supply port 60.
• the central vertical passage 62 in turn communicates with a transverse passage 64 having a liquid outlet port 65 and a reduced downstream flowback or return port 66 adjacent a lower end of the valve body 51.
• control valves 15 are ganged with the liquid supply ports 60 of the plurality of control valves communicating with each other and with the liquid supply line 18, and with each liquid outlet port 65 being coupled to a respective liquid supply line 19 to a spray section 12 and each liquid flowback or return port 66 coupled to the return line 20.
• each control valve 15 has a single valve stem 70 for controlling the flow of liquid from the main liquid supply port 60 to the outlet port 65 and respective supply line 19 and to the liquid flowback or return port 66 and return line 20.
• the valve stem 70 extends centrally through the main valve body 50, the liquid supply port 60, and the central liquid supply passage 62 of the lower valve body 51.
• the valve stem 70 in this case extends the length of the main and lower valve bodies 50, 51 with a lower end thereof being positionable through a lower flowback or return port 66.
• An annular seal 71 is supported about a lower end of the valve stem 70 (FIG. 9A) for sealing contact with the reduced diameter flowback or return port 66, as will become apparent.
• the valve stem 70 in this case has an upper and lower sections 70a, 70b fixedly secured together by a threaded coupling 72.
• annular seal 75 For controlling the supply of liquid from the liquid supply port 60 to the central passage section 62 and outlet port 65 of each spray nozzle 14, an annular seal 75 is supported on the stem 70 within the main liquid supply port 60, as depicted in FIG. 4.
• the main annular seal 75 is biased downwardly against an E-clip 76 fixed to the stem 70 by a coil spring 78 interposed between a washer 79 on an upper side of the annular seal 75 and an upper E-clip 80 fixed to the stem a distance above the washer 79.
• An O-ring seal 81 in this case is mounted in surrounding relation to the valve stem 70 within the annular seal 75.
• the electric motor 52 is operatively coupled to the valve stem 70.
• the electric motor 52 may be a 12 V DC, reversible motor, having a drive shaft 85 coupled to a drive train 86 for rotating an output shaft 88 supported in depending relation to the drive train 86 above valve steam 70.
• an optical switch flag 89 affixed to an upper end of the valve stem 70 is threadedly supported on a threaded section 90 the output shaft 88.
• the switch flag 89 is retained against rotation such that driven rotation of the output shaft 88 will cause that switch flag 89 and valve stem 70 coupled to the underside thereof to be raised or lowered relative to the valve bodies 50, 51.
• a transverse leg section 89a on one side of the flag switch 89 is guided for movement within a guide track 92 fixed within the motor housing (FIG. 11).
• the switch flag 89 has a thinner leg section 89b on a side opposite the guide flag section 89a and is movable with the valve stem 70 between optical sensors 95a, 95b that control the electric motor 52 and limit upper and lower movement of the switch flag 89, and hence the valve stem 70.
• the optical sensors 95a and 95b in this case are coupled to a circuit board 96 (FIG. 10) that effects operation of the electric motor 52, via an appropriate operator control, and movement of the valve stem 70 between the sensors 95a, 95b.
• each control valve 15 is operable such that the valve stem 70 completely closes and seals off communication between the main liquid inlet port 60 and the central flow passageway 62 to the outlet port 65 to the spray section 12 prior to enabling communication from the outlet port 65 and supply line 19 to the flowback or return port 66. As depicted in FIGS.
• valve stem 70 is raised and positioned in a closed position in the flowback or return port 66, with the annular seal 71 preventing passage of liquid from both the central passage 62 and outlet port 60 to the flowback or return port 66.
• the electric motor 52 is operated in the reverse direction under control for the circuit board 96, rotating the output shaft 88 in an opposite direction that lowers the optical switch flag 89 and valve stem 70 downwardly to an intermediate position that initially closes both the liquid inlet port 60 while flowback and return port 66 remains closed, as depicted in FIG. 8.
• the annular seal 75 is biased into position closing the inlet port 60 while the lower valve stem 70 continues to close the flowback port 66.
• valve stem 70 and optical switch flag 89 Upon lowering of the valve stem 70 and optical switch flag 89 to the level that the flag section 89b contacts the lower optical sensor 95b, the lower end of the valve stem 70 and annular seal 65 are disposed beyond the reduced diameter outlet or return port 66, thereby enabling communication of any downstream liquid to be drained back through the flowback outlet 66 to the return line 20. It will be appreciated that since the inlet port 60 is completely closed prior to opening of the flowback or return port 66, there are no bursts or any other communication of liquid from the inlet port 60 to the return port 66 and return line 15 during liquid shutoff to the spray section 12 or other appreciable loss of supply liquid that significantly affects reliable monitoring of the liquid chemical or the like.
• the drive motor 52 can be operated in reverse direction, raising the switch flag 89 and valve stem 70 to a position that first closes the flowback or return port 66 while the annular seal 75 remains biased in a position closing the inlet port 60 and then upon continued raising of the valve stem 70 and to the level that the optical switch flag section 89b engages the upper optical sensor 95a.
• Such further movement causes the E-clip 76 to lift the annular seal 75 and open the main liquid supply port 60, as depicted in FIG. 4, for communicating liquid to spray section 12.
• valve control spraying system is provided that is operable for shutting off and turning on the liquid supply to the spray nozzles without unwanted bursts of liquid through the control valve that can affect accurate monitoring of liquid chemical usage.
• the valving system utilizes a single valve stem that is controlled for completely shutting off liquid to the spray nozzles prior to enabling drainage of liquid to a return line of the spraying system. It can also be seen that the valve control system is relatively simple in construction and operation and lends itself to economical manufacture and reliable usage.

Landscapes

• Life Sciences & Earth Sciences (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)
• Special Spraying Apparatus (AREA)
• Nozzles (AREA)
• Spray Control Apparatus (AREA)
• Multiple-Way Valves (AREA)
• Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
• Fluid-Driven Valves (AREA)

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• 2021
  • 2021-02-12 HU HUE21712274A patent/HUE065343T2/hu unknown
  • 2021-02-12 FI FIEP21712274.6T patent/FI4103333T3/fi active
  • 2021-02-12 ES ES21712274T patent/ES2969918T3/es active Active
  • 2021-02-12 CA CA3169097A patent/CA3169097A1/en active Pending
  • 2021-02-12 DK DK21712274.6T patent/DK4103333T3/da active
  • 2021-02-12 BR BR112022016116-6A patent/BR112022016116B1/pt active IP Right Grant
  • 2021-02-12 WO PCT/US2021/017963 patent/WO2021163567A1/en not_active Ceased
  • 2021-02-12 AU AU2021219800A patent/AU2021219800A1/en active Pending
  • 2021-02-12 PT PT217122746T patent/PT4103333T/pt unknown
  • 2021-02-12 CN CN202180028318.9A patent/CN115397563A/zh active Pending
  • 2021-02-12 US US17/797,650 patent/US12508606B2/en active Active
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• 2022
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