EP0238612A1 - Device for spraying a liquid on a crop - Google Patents

Device for spraying a liquid on a crop

Info

Publication number
EP0238612A1
EP0238612A1 EP19860905947 EP86905947A EP0238612A1 EP 0238612 A1 EP0238612 A1 EP 0238612A1 EP 19860905947 EP19860905947 EP 19860905947 EP 86905947 A EP86905947 A EP 86905947A EP 0238612 A1 EP0238612 A1 EP 0238612A1
Authority
EP
European Patent Office
Prior art keywords
liquid
nozzle
air
spray nozzle
directed
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
EP19860905947
Other languages
German (de)
French (fr)
Inventor
Frits Homburg
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.)
HOMBURG MACHINEHANDEL BV
Original Assignee
HOMBURG MACHINEHANDEL BV
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 HOMBURG MACHINEHANDEL BV filed Critical HOMBURG MACHINEHANDEL BV
Publication of EP0238612A1 publication Critical patent/EP0238612A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0884—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being aligned
    • 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
    • A01M7/0003—Atomisers or mist blowers
    • A01M7/0014—Field atomisers, e.g. orchard atomisers, self-propelled, drawn or tractor-mounted
    • 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
    • A01M7/005—Special arrangements or adaptations of the spraying or distributing parts, e.g. adaptations or mounting of the spray booms, mounting of the nozzles, protection shields
    • A01M7/006—Mounting of the nozzles
    • 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
    • B05B7/0075—Nozzle arrangements in gas streams

Definitions

  • the invention relates to a device for spraying a liquid on a crop, comprising a frame, at least one liquid spray nozzle connected to the frame and coupled to a line supplying liquid under pressure, and at least one air nozzle arranged close to the liquid spray nozzle and coupled to a line supplying air, which air nozzle has a discharge opening pointing substantially in the same direction as the liquid spray nozzle, while a directed air current discharged by the air nozzle can absorb a flow of liquid sprayed by the liquid spray nozzle.
  • Such a device having a number of nozzles, whereby each liquid spray nozzle is arranged in the middle of a cylinder shaped air nozzle, is known.
  • this known device has the advantage that due to the extra air current supplied the sprayed liquid penetrates better ' between the crop and is applied more evenly.
  • the invention has for its object to further improve such a known device.
  • the air nozzle has a slot-like discharge opening that discharges a flat, directed current of air. It has been found that penetration into the crop is greatly improved as a result of this. In a preferred embodiment this has the consequence that the same result can be achieved with a third of the amount of liquid otherwise normally used.
  • the device comprises a spray boom with a number of spray nozzles arranged behind a tractor, this tractor also carrying a storage tank for the liquid to be sprayed, an area of crop three times as large can be treated per tank filling. This achieves a considerable time saving. - 2 -
  • a further developed preferred embodiment is characterized in that the liquid spray nozzle is of the type discharging a flat liquid screen and is arranged such that it discharges a liquid screen directed virtually parallel to the flat air current. As a result the sprayed
  • the liquid spray nozzle and the air nozzle can hereby be arranged in a favourable manner at a small distance from each other.
  • the liquid spray nozzle thus remains separately
  • Fig. 1 shows a perspective view of a device according 5 to the invention.
  • Fig. 2 shows a partly broken away perspective detail view of a nozzle system according to a first embodiment.
  • Fig. 3 shows a view corresponding with fig. 2 of a second embodiment.
  • the spraying device 1 comprises a frame 2 that is connected by means of suitable mountings to the lift apparatus of a tractor 15. Arranged on the frame 2 are a number of nozzles 3 according to the invention. Air is supplied to each of these nozzles via air hoses 5.
  • hoses are coupled to an air fan 4 which is driven in a manner per se known by the power take-off of the tractor 15. Further coupled to frame 2 is a liquid pump (not shown) which feeds liquid from the storage tank 7 to nozzles 3 via liquid hoses 6. By moving the spray device 1
  • the liquid can be sprayed from the storage tank 7 onto the crops.
  • the spray nozzle 3 comprises an air nozzle and a liquid spray nozzle.
  • the air nozzle is formed by a cap 8
  • Cap 8 has a form such that a uniform transition occurs from the round inlet opening 14 to the slot-like discharge opening 9, so
  • liquid nozzle 11 Underneath air nozzle 8 is arranged liquid nozzle 11.
  • the discharge opening of this liquid nozzle 11 has the form of a slot 12, so that this per se known liquid nozzle 11 can discharge the liquid supplied via the line 6 in the
  • the liquid spray nozzle 11 is arranged such that it discharges a liquid screen that is directed virtually parallel to the flat air current 10. Due to the lower static pressure in the flowing air, the liquid is absorbed
  • the liquid spray nozzle 11 can if required be directed at a small angle to the air nozzle, so that the liquid is sprayed directly into the air current. The same effect is obtained with an upper surface of the air nozzle directed 5 slanting towards the slot.
  • the air current is thereby dir -ct'ed slightly downward, so that the liquid is sprayed Into: t:he air current.
  • the liquid spray nozzle 11 is dire_ct_Ly accessible, so that in the case of malfunction it can he-, reached without further disassembly operations.
  • the liquid spray nozzle 23 is arranged inside the cap 26 of the air nozzle.
  • the liquid feed hose 21 is guided inwards via an opening 22 in the cap 26.
  • the jet of liquid 24 discharged by nozzle 23 is already mixed in the cap 26 " of 'the air nozzle with the
  • Nozzle 23 can be a so-called slot nozzle, and this, 0 particularly when this liquid spray nozzle is arranged very close to the discharge opening 27, is favourable for good dispersal. If the liquid nozzle is arranged very close to the inlet side of cap 27, it can also take the form of a nozzle that is circular spraying.

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)

Abstract

Le dispositif (1) ci-décrit comprend un bâti (2), au moins un ajutage (11) de pulvérisation de liquide relié audit bâti (2) et couplé à une canalisation (6) délivrant un liquide sous pression, et au moins un ajutage d'air (3) agencé à proximité de l'ajutage (11) de pulvérisation de liquide et couplé à une canalisation (5) d'amenée d'air, lequel ajutage d'air (3) possède une ouverture de décharge (9) pointant sensiblement dans la même direction que l'ajutage (11) de pulvérisation de liquide, tandis qu'un courant d'air orienté délivré par l'ajutage d'air (3) peut absorber un écoulement de liquide pulvérisé par l'ajutage (11) de pulvérisation de liquide. En outre, l'ajutage d'air (3) possède une ouverture de décharge (9) en forme de fente qui délivre un courant d'air plat orienté.The device (1) described below comprises a frame (2), at least one nozzle (11) for spraying liquid connected to said frame (2) and coupled to a pipe (6) delivering a liquid under pressure, and at least one air nozzle (3) arranged near the liquid spraying nozzle (11) and coupled to an air supply pipe (5), which air nozzle (3) has a discharge opening ( 9) pointing substantially in the same direction as the nozzle (11) for spraying liquid, while a directed air stream delivered by the nozzle (3) can absorb a flow of liquid sprayed by the liquid spray nozzle (11). In addition, the air nozzle (3) has a slit-shaped discharge opening (9) which delivers a directed flat air flow.

Description

DEVICE FOR SPRAYING A LIQUID ON A CROP
The invention relates to a device for spraying a liquid on a crop, comprising a frame, at least one liquid spray nozzle connected to the frame and coupled to a line supplying liquid under pressure, and at least one air nozzle arranged close to the liquid spray nozzle and coupled to a line supplying air, which air nozzle has a discharge opening pointing substantially in the same direction as the liquid spray nozzle, while a directed air current discharged by the air nozzle can absorb a flow of liquid sprayed by the liquid spray nozzle.
Such a device having a number of nozzles, whereby each liquid spray nozzle is arranged in the middle of a cylinder shaped air nozzle, is known. Compared to spray devices whereby the liquid is sprayed under pressure directly out of a spray nozzle onto the crop, this known device has the advantage that due to the extra air current supplied the sprayed liquid penetrates better' between the crop and is applied more evenly.
The invention has for its object to further improve such a known device.
This is achieved according to the invention because the air nozzle has a slot-like discharge opening that discharges a flat, directed current of air. It has been found that penetration into the crop is greatly improved as a result of this. In a preferred embodiment this has the consequence that the same result can be achieved with a third of the amount of liquid otherwise normally used. As a result, in the case that for example the device comprises a spray boom with a number of spray nozzles arranged behind a tractor, this tractor also carrying a storage tank for the liquid to be sprayed, an area of crop three times as large can be treated per tank filling. This achieves a considerable time saving. - 2 -
Trials have also indicated that, per unit of area of the crop to be sprayed, less active substance need be present in the liquid. This active substance is for example a pesticide. This advantage can be attributed to the very 5 good dispersal of the liquid. In this way a direct saving is thus achieved in the cost of the liquid to be sprayed, which can amount to many tens of thousands of guilders per company per year. Furthermore, in the case of pesticides, pollution of the environment is greatly limited.
10. A further developed preferred embodiment is characterized in that the liquid spray nozzle is of the type discharging a flat liquid screen and is arranged such that it discharges a liquid screen directed virtually parallel to the flat air current. As a result the sprayed
15 liquid is discharged evenly over the width of the air current, thus ensuring a very good dispersal.
The liquid spray nozzle and the air nozzle can hereby be arranged in a favourable manner at a small distance from each other. The liquid spray nozzle thus remains separately
20 accessible so that in the case it malfunctions no disassembly operation need be performed.
It has been found that an embodiment whereby the nozzles are directed slanting downwards and the liquid spray nozzle is arranged beneath the air nozzle produces
25_- particularly good results. Because of the lower pressure in the air current the sprayed liquid is taken up automatically into this air current. Because the air current flowing out above the sprayed liquid forms as it were a "shield" to what is above it, wind has little or no 0 influence on the result of the spray treatment.
The invention will be explained further in the following description with reference to embodiments shown in the figures .
Fig. 1 shows a perspective view of a device according 5 to the invention. Fig. 2 shows a partly broken away perspective detail view of a nozzle system according to a first embodiment.
Fig. 3 shows a view corresponding with fig. 2 of a second embodiment. 5 The spraying device 1 comprises a frame 2 that is connected by means of suitable mountings to the lift apparatus of a tractor 15. Arranged on the frame 2 are a number of nozzles 3 according to the invention. Air is supplied to each of these nozzles via air hoses 5. These
10 hoses are coupled to an air fan 4 which is driven in a manner per se known by the power take-off of the tractor 15. Further coupled to frame 2 is a liquid pump (not shown) which feeds liquid from the storage tank 7 to nozzles 3 via liquid hoses 6. By moving the spray device 1
15 using the tractor 15 in a manner per se known over a piece of land planted with crops, the liquid can be sprayed from the storage tank 7 onto the crops.
The spray nozzle 3 comprises an air nozzle and a liquid spray nozzle. The air nozzle is formed by a cap 8
20 having a round inlet connection 14 and a slot-like discharge opening 9. The air hose 5 is coupled by means of a clamp 16 to the inlet connection of cap 8. Cap 8 has a form such that a uniform transition occurs from the round inlet opening 14 to the slot-like discharge opening 9, so
25 that the nozzle can discharge a flat, directed current of air 10. Underneath air nozzle 8 is arranged liquid nozzle 11. The discharge opening of this liquid nozzle 11 has the form of a slot 12, so that this per se known liquid nozzle 11 can discharge the liquid supplied via the line 6 in the
30 form of a screen 13.
The liquid spray nozzle 11 is arranged such that it discharges a liquid screen that is directed virtually parallel to the flat air current 10. Due to the lower static pressure in the flowing air, the liquid is absorbed
35 automatically into the air current. The liquid spray nozzle 11 can if required be directed at a small angle to the air nozzle, so that the liquid is sprayed directly into the air current. The same effect is obtained with an upper surface of the air nozzle directed 5 slanting towards the slot. The air current is thereby dir -ct'ed slightly downward, so that the liquid is sprayed Into: t:he air current. The liquid spray nozzle 11 is dire_ct_Ly accessible, so that in the case of malfunction it can he-, reached without further disassembly operations.
10. With the nozzle 20 from fig. 3 the liquid spray nozzle 23 is arranged inside the cap 26 of the air nozzle. The liquid feed hose 21 is guided inwards via an opening 22 in the cap 26. The jet of liquid 24 discharged by nozzle 23 is already mixed in the cap 26 "of 'the air nozzle with the
15 air supplied via the hose 5. The air current 25 flowing out of the slot-like opening 27 of air nozzle 20 to the outside already contains the finely dispersed liquid from nozzle 23.
Nozzle 23 can be a so-called slot nozzle, and this, 0 particularly when this liquid spray nozzle is arranged very close to the discharge opening 27, is favourable for good dispersal. If the liquid nozzle is arranged very close to the inlet side of cap 27, it can also take the form of a nozzle that is circular spraying.

Claims

Claims
1. Device for spraying a liquid on a crop, comprising a frame, at least one liquid spray nozzle connected to said frame and coupled to a line supplying liquid under pressure, and at least one air nozzle arranged close to
5 said liquid spray nozzle and coupled to a line supplying air, said air nozzle having a discharge opening pointing substantially In the same direction as said liquid spray nozzle, while a directed air current discharged by said air nozzle can absorb a flow of liquid sprayed by said liquid 10 spray nozzle, characterized in that the air nozzle has a slot-like discharge opening that discharges a flat, directed current of air.
2. Device as claimed in claim 1, characterized in that the liquid spray nozzle is of the type discharging a flat
1-5 liquid screen and is arranged such that it discharges a liquid screen directed virtually parallel to the flat air curren .
3. Device as claimed in claim 2, characterized in that the liquid spray nozzle and the air nozzle are arranged at
20 a small distance from each other.
4. Device as claimed in claim 3, characterized in that the nozzles are pointed slanting downwards and the liquid nozzle is arranged under the air nozzle.
EP19860905947 1985-09-27 1986-09-29 Device for spraying a liquid on a crop Pending EP0238612A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8502649 1985-09-27
NL8502649A NL8502649A (en) 1985-09-27 1985-09-27 DEVICE FOR SPRAYING A LIQUID ON A CROP.

Publications (1)

Publication Number Publication Date
EP0238612A1 true EP0238612A1 (en) 1987-09-30

Family

ID=19846630

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860905947 Pending EP0238612A1 (en) 1985-09-27 1986-09-29 Device for spraying a liquid on a crop

Country Status (4)

Country Link
EP (1) EP0238612A1 (en)
AU (1) AU6402186A (en)
NL (1) NL8502649A (en)
WO (1) WO1987001909A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5176322A (en) * 1986-08-29 1993-01-05 Sartor Giuseppe M Crop-spraying apparatus
EP0319531A4 (en) * 1986-08-29 1990-09-05 Giuseppe Mario Sartor Crop-spraying apparatus
DK160916C (en) * 1988-03-02 1991-11-11 Dems Eng APPLIANCE WITH AT LEAST ONE LIQUID SPRAY FOR EXJECTING LIQUID OVER PLANT SUBSTANCES
FR2649336B2 (en) * 1989-01-06 1994-06-03 Tecnoma DEVICE FOR SENDING A TREATMENT PRODUCT TO PLANTS
FR2641479B1 (en) * 1989-01-06 1991-07-12 Tecnoma METHOD AND DEVICE FOR SENDING A TREATMENT PRODUCT TO PLANTS
GB8901564D0 (en) * 1989-01-25 1989-03-15 Jeffery John C Spraying
DE69024507T2 (en) * 1990-07-04 1996-09-12 Benest Eng Ltd METHOD AND DEVICE FOR SPRAYING CULTURES
WO1993002552A1 (en) * 1991-08-06 1993-02-18 Benest Engineering Limited Method and apparatus for crop spraying
US5246166A (en) * 1991-09-30 1993-09-21 Her Majesty The Queen In The Right Of Canada As Represented By The Minister Of Forestry Spraying apparatus
GB9419552D0 (en) * 1994-09-27 1994-11-16 Somerset Fruit Mach Ltd Spraying
US5680993A (en) * 1995-06-05 1997-10-28 National Research Council Of Canada Liquid atomizing device with controlled atomization and spray dispersion
AUPO313596A0 (en) 1996-10-22 1996-11-14 Enviromist Industries Pty Ltd Spray assembly
IT1287136B1 (en) * 1996-11-07 1998-08-04 Cima FAN DIFFUSER FOR SPRAYERS OR SPRAYERS OF TREATMENT LIQUIDS IN AGRICULTURE
US20070252020A1 (en) * 2004-08-13 2007-11-01 Paolo Smeraldi (Low-Volume) Pneumatic Atomiser and Anti-Drip Device Thereof
US9167745B2 (en) 2011-08-16 2015-10-27 360 Yield Center, Llc Liquid dispensing system
US10076075B1 (en) 2011-08-16 2018-09-18 360 Yield Center, Llc Liquid dispensing system
CN104012505A (en) * 2014-06-20 2014-09-03 南通黄海药械有限公司 Direct spraying device of efficient atomization spraying machine
IT201800001012A1 (en) * 2018-01-16 2019-07-16 Elivent S R L APPARATUS FOR THE TARGETED DISTRIBUTION OF PLANT PROTECTION ON AGRICULTURAL CROPS

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR781482A (en) * 1933-10-30 1935-05-16 Vermorel Ets Improvement in the spraying method of mixtures for the treatment of trees or shrubs
US2745210A (en) * 1953-07-07 1956-05-15 Raymond L Hild Insecticide distributor
US3472454A (en) * 1967-10-26 1969-10-14 Subscription Television Inc Low volume sprayer system
FR2049957A5 (en) * 1970-06-05 1971-03-26 Heywang Ets
WO1983003781A1 (en) * 1982-04-28 1983-11-10 Hiruma, Yutaka Method and device for injecting high pressure water for facility or the like on roadside

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8701909A1 *

Also Published As

Publication number Publication date
WO1987001909A1 (en) 1987-04-09
AU6402186A (en) 1987-04-24
NL8502649A (en) 1987-04-16

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Inventor name: HOMBURG, FRITS