CA2137118A1 - Drift control system for sprayers - Google Patents
Drift control system for sprayersInfo
- Publication number
- CA2137118A1 CA2137118A1 CA002137118A CA2137118A CA2137118A1 CA 2137118 A1 CA2137118 A1 CA 2137118A1 CA 002137118 A CA002137118 A CA 002137118A CA 2137118 A CA2137118 A CA 2137118A CA 2137118 A1 CA2137118 A1 CA 2137118A1
- Authority
- CA
- Canada
- Prior art keywords
- spray
- shield
- air
- deflector
- arcuate
- 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.)
- Abandoned
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
-
- 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
- A01M7/0064—Protection shields
-
- 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
- A01M7/0071—Construction of the spray booms
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)
- Special Spraying Apparatus (AREA)
- Catching Or Destruction (AREA)
Abstract
The open front air curtain spray shield is designed for use with an agricultural sprayer. The device is hollow and is adapted to scoop the air or obtain it from an enclosed blower fan and direct it through nozzles strategically aimed to reduce spray drift and drip. As the sprayer moves forwardly and spray nozzles direct spray upon the crop canopy, separate air currents are developed which are directed downwardly and rearwardly of the spray, reducing updraft, drip, and drift. An optional perforated curtain can be suspended from the rear of the device.
Description
~1371~ 8 DISCLOSURE
Field of Invention Thlæ inventlon relates to agriculture fleld sprayers for spraying liquid herblcides and pesticides. More particularly the invention relates to windshlelds or alr curtalns deslgned to reduce drlfting of the sprayed llquld.
Backqround In modern farmlng, the use of pre and post emergent spraylng of pestlcldes and/or herblcldes ls a necesslty. In the pralrles or mld-west where larger farms predomlnate thls ls carrled out wlth sprayers of 60 to 130 feet wide, drawn by a power source and adapted to move quickly across the land.
Spraying implements are prone to the problem of spray drift. Drlft due to wlnd or even the forward velocity of the machlnery, causes two problems. Flrstly, chemlcal sprays blow onto ad~acent areas and can do serlous damage to crops, livestock and humans. Secondly, drift results ln an economlc loss of chemlcals. For example, wlnd losses of fine spray droplets can become quite slgnificant with 7.5% drift losses expected with XR8001* slpray tlps operatlng at 40 psl ln a 20 km per hour wlnd, when spraying 43 to 48 cm above the ground.
Some drlft control systems enclose the boom completely maklng lt dlfflcult to access or see the nozzles resulting in the operator ~ot belng able detect plugged nozzles wlthout speclal senslng dlvlces. Other shroud systems are effective at reduclng drift but experlence large chemical losses. Fine droplets accumulate on the shroud where they drop off as large drops.
~ 2137118 Losses greater than 10% have been measured on perforated shrouds.
The appllcant of the present lnvention solved the drlft problem ln part wlth a device as descrlbed and claimed ln lts U.S.
Patent No. 5,062,572, entitled SPRAY SHIELD. This devlce has hollow curvllinear shields with an upper alr inlet and lower downwardly directed outlets of smaller cross sectlon. These are mounted o~ elther slde of the wet spray boom to dlrect lncomlng alr downwardly on elther slde of the spray, thereby produclng a protectlve curtain of alr to prevent drlft.
In the device of the present invention there are some signiflcant lmprovements over that dlsclosed and clalmed ln U.S.
Patent No. 5,062,572.
It ls therefore an ob~ect of the present lnventlon to produce a less expenslve, more efflcient drlft control system which reduces updraft, drlft and drip whlle still permitting the nozzles of the wet spray boom to be readlly vlslble to the operator.
Summary of the Inventlon ~herefore, this lnvention seeks to provide a spray shield deflector for use with an agrlcultural llquid sprayer and adapted to be mounted on wet spray booms equipped with a plurality of spray nozzles; sald sprayer belng adapted to spray when sald booms are in the field position transverse to the directlon of travel; sald shield comprislng, an arcuate hollow elongate structure mounted parallel to said boom; said shield lncludlng at least one alr inlet; sald shleld further comprlslng at least one upper alr outlet and at least one lower alr outlet, sald lower alr 21371~8 720~1-45 outlet belng located downwardly and rearwardly from said upper air outletS sald shield further comprlsing an arcuate convex upper side and an arcuate concave underslde; sald underslde belng non-contlnuous and comprlslng a flrst upper arcuate portlon above sald upper alr outlet and a second lower arcuate portion between sald upper alr outlet and said lower alr outlet.
The spray shleld of the present lnventlon ls a cost effectlve way for controlllng spray drlft wlthout causlng spray to accumulate on the shleld or deflector. The system also provldes the operator wlth an unobstructed view of the nozzles. The shlelds or deflectors can be hlnged so that they can be fllpped up from the back, thereby allowlng the operator to access the nozzles from behlnd. Hlnges also allow the deflectors to clear obstacles wlthout damage.
The system works by deflectlng the lncomlng wlnd downwardly toward the ground, thereby permlttlng the spray droplets that would normally be carrled away by the horizontal wlnd, to be deposlted on the ground or plants, relatlvely unaffected by the wlnd. The spray will enter the crop canopy whlle the incoming alr ls travelllng downwardly toward the ground.
Once the droplets fall lnto thls reglon, the wlnd wlll normally not affect them.
The spray shleld or deflector of the present lnventlon appears curvlllnear ln cross sectlon. It has, in one embodlment, a slngle elongate vertically dlsposed forwardly faclng alr inlet.
When a plurality of shlelds are placed together, these air lnlets extend all the way along the wet spray boom, and open slightly forwardl~ of the booms and nozzles.
~1371~8 In a second embodlment of the inventlon the spray shleld ls constructed such that lt does not have to depend on forward velocity of the vehlcle or a headwlnd to produce downwardly dlrected air currents. In the second embodiment the hollow shield deflectors are connected at their upper portlon to at least one alr channel or tube which ls connected to a prlmary alr dlstrlbution tube. The prlmary alr dlstrlbutlon tube ls connected to an alr blower which brlngs alr from the outslde of the system and forces lt through the alr shleld deflectors of the present lnvention. This embodiment of the invention is particularly useful when there ls no headwlnd, or the vehlcle ls movlng slowly, or there ls a strong tailwlnd.
In operatlon, the arcuate underslde of the shield catches the wlnd as the machine moves forwardly and produces a first air current or vein which reduces updraft. This alr current or vein descends rearwardly of the sprayed llquld.
A second current of alr or alr vein ls dlrected downwardly and rearwardly through upper air outlets. The velocity of this alr ls greater than the lncomlng air produced by headwind, movement of the machine across the land, or ln the case of the second embodlment, a blower fan. Thls second alr current helps to reduce drlp or accumulatlon of the spray droplets on the shleld.
The second set of alr outlets whlch are located rearwardly and downwardly of the first outlets create a thlrd downwardly directed air current which reduces drift of the spray.
An optlonal perforated polyurethane flexlble curtaln can be attached to the lowermost and rearmost portlon of the spray shleld deflector to aid in drift reduction.
2137~ ~8 The upper rear slde of the hollow spray shleld deflector is of a smooth curvillnear convex form and descends rearwardly and downwardly ln a manner so as to shleld the nozzles from a tallwind.
Brief Description of the Drawings The invention will be described in greater detail in con~unction with the followlng drawings wherein:
Figure 1 is a partlal top view of an agricultural sprayer on which the spray shleld deflectors of the present inventlon are mounted;
Flgure 2 is a schematic view of the present invention;
Figure 3 is a similar view to Figure 2 lllustratlng an additional embodlment of the present lnventlon;
Figure 4 is a side view of one unit of the present inventlon.;
Flgure 5 is a front view of the present lnvention;
Figure 6 ls a perspectlve exploded view of the present invention;
Figure 7 is a cross sectlon VII-VII of the sprayer ln Figure l;
Figure 8 ls a perspective view of a second embodiment of the present invention;
Flgure 9 is a perspectlve view of an alternative second embodiment of the present lnventlon; and Figure 10 is a perspective view of an alternative third embodiment of the present invention.
21~711~
Detailed Descrlption of the Invention In Figure 1 an agricultural sprayer shown generally as 10 ls e~ulpped wlth a framed cart 2 supported by wheels 4 and adapted to be towed by a power source such as a tractor 3. On the framed cart 2 is mounted a tank 5 capable of holding liquid pesticides or herbicides.
In Figure 1, a rlght maln wing boom 6 is supported by a castor wl~eel 7. Rotatably attached to main wlng boom 6 ls a dry spray boom 8 which is connected by means of struts 23,24 to a wet spray boo:m 9. Mounted on wet spray boom 9 are a plurality of unlts of the present invention shown as 1.
Figure 2 ls a partial cross section of the spray shield deflector of the present lnvention, drawn schematically and shown generally as 1. The spray shield deflector is mounted onto wet spray boolm 9 by means of rubber bushings 10 which provide needed flexibillty when spray shield 1 strlkes obstacles. A clamp 11 ls secured to the underside of spray shield 1 by means of bolts shown generally as 12. Protruding downwardly and forwardly of the wet spray boo.m are a plurallty of nozzles 13.
The normal directlon of sprayer lmplement travel in Flgure 2 ls shown wlth an arrow marked A whlle the prevalllng alr flow or wind ls shown ln the opposlte dlrectlon as arrows B. The alr or wlnd enters the hollow spray shleld deflector as the arrows lndlcate through air inlet 14. Air exits the shleld at a hlgher veloclty due to the smaller orlflces of the upper clrcular air outlet ports shown as 15. Another alr current exlts the deflector also at a hlgher velocity through outlet ports 16. The upper surface of the shield deflector ls marked 17. It ls arcuate and ~ 2137118 smooth and permits the wlnd B to move smoothly over the spray shleld deflector and not cause turbulence.
The underside of the shleld is also arcuate ln shape but non-continuous due to upper alr outlet 15. Thus, the underslde has an upper portlon 18 and a lower portlon 19, the latter being located between outlets 15 and 16.
In operatlon, as the spray lmplement moves forwardly in dlrectlon A, a flrst current of alr strlkes surface 18 and creates a downwardly movlng air veln or curtaln C whlch tends to reduce the updraft of spray partlcles 20. A second alr current or veln D
emerges through outlet 15 and reduces drip which is generally caused by spray partlcles collectlng and becoming droplets on portions :L8 and 19 of the shleld. A thlrd alr current marked E
emerges from outlet 16 and moves downwardly preventlng rearward drlft of ~roplets 20.
Thus, it can be seen in Figure 2, that very few spray droplets or partlcles 20 pass beyond the lmmedlate crop canopy below the spray shleld.
Flgure 3 has an addltlonal curtaln or strlp, shown as 21, whlch is attached at 22 to spray shield deflector 1. Thls strip ls generally made of a polyurethane-type product, approxlmal;ely 1/16" thlck. It has perforatlons of preferably 5/8"
and permll;s low veloclty alr to pass therethrough. The low veloclty ~lr shown ln Flgure 3 ls marked generally as F. In operatlon" any chemlcal spray strlklng thls curtaln would lmmedlate:Ly be wiped onto the undersides of the weed leaves.
Figure 4 is a slde view of the spray shleld l of the present invention. The labelled parts are slmilar to those found ~ 2137118 in Flgures 2 and 3. A groove marked as 29 ls adapted to seat the spray shield deflector on the wet spray boom 9.
Figure 5 ls a front vlew of the embodlment of the present inventlon shown ln Figure 4. The air lnlet opening 14 is divlded by a number of vertical structural braces 28.
Figure 6 is an exploded perspective vlew of the present invention. In thls embodlment the upper and lower alr outlets 15, 16 are unltary and elongate.
Flgure 7 ls a cross sectlon of the area shown as VII-VII of Figure 1. Struts 23 and 24 and llnkage 25 keep the spray nozzles pointlng in the same direction regardless of their height above the crop canopy. The struts 23, 24 pivot about polnts 26 and 27, strut 24 being flxedly mounted to dry spray boom 8, whlch rotates ln a bushing.
Figure 8 ls an alternatlve embodlment of the lnvention.In the first embodlment the alr lnlet 14 ls adapted to scoop up the preva:Lllng wlnd or alr, and redlrect lt through the outlets.
In Flgure 8, the alr outlets 14 are connected to a palr of enclosed alr channels 14A. These ln turn are connected to a prlmary a:Lr dlstrlbutlon tube 14B, ln whlch a blower fan 30 ls located. The blower fan 30 takes outslde alr and forces it through primary alr distribution tube 14B through vertical channels :L4A through openlngs 14 lnto the hollow elongate spray shleld de~Elector 1. Alr velns or curtalns leave upper alr exlt 15 and lower alr exlt 16. One also notes that the exlts 15 and 16 ln Figure 8 comprises one or more orifices. In Figure 8, any prevailing air or wind strlking the spray shield deflector on the concave underslde surfaces 18 and 19 is also directed downwardly, ~ 2137118 preventing updraft of the air.
Flgure g is a another perspectlve vlew of the same embodlment as shown ln Flgure 8, the only difference belng that the upper alr exlts 15 have been omltted leavlng all of the alr to exit the lower alr outlets 16.
In Figure 10, the concave undersurface 19 is contlnuous as only the lower alr outlets 16 are present.
In summary, the present inventlon is an improvement over the prlor art ln that it not only reduces drlft, but also drlp.
It ls lne:gpenslve to manufacture and use, and provldes accessibility to sprayer nozzles.
Field of Invention Thlæ inventlon relates to agriculture fleld sprayers for spraying liquid herblcides and pesticides. More particularly the invention relates to windshlelds or alr curtalns deslgned to reduce drlfting of the sprayed llquld.
Backqround In modern farmlng, the use of pre and post emergent spraylng of pestlcldes and/or herblcldes ls a necesslty. In the pralrles or mld-west where larger farms predomlnate thls ls carrled out wlth sprayers of 60 to 130 feet wide, drawn by a power source and adapted to move quickly across the land.
Spraying implements are prone to the problem of spray drift. Drlft due to wlnd or even the forward velocity of the machlnery, causes two problems. Flrstly, chemlcal sprays blow onto ad~acent areas and can do serlous damage to crops, livestock and humans. Secondly, drift results ln an economlc loss of chemlcals. For example, wlnd losses of fine spray droplets can become quite slgnificant with 7.5% drift losses expected with XR8001* slpray tlps operatlng at 40 psl ln a 20 km per hour wlnd, when spraying 43 to 48 cm above the ground.
Some drlft control systems enclose the boom completely maklng lt dlfflcult to access or see the nozzles resulting in the operator ~ot belng able detect plugged nozzles wlthout speclal senslng dlvlces. Other shroud systems are effective at reduclng drift but experlence large chemical losses. Fine droplets accumulate on the shroud where they drop off as large drops.
~ 2137118 Losses greater than 10% have been measured on perforated shrouds.
The appllcant of the present lnvention solved the drlft problem ln part wlth a device as descrlbed and claimed ln lts U.S.
Patent No. 5,062,572, entitled SPRAY SHIELD. This devlce has hollow curvllinear shields with an upper alr inlet and lower downwardly directed outlets of smaller cross sectlon. These are mounted o~ elther slde of the wet spray boom to dlrect lncomlng alr downwardly on elther slde of the spray, thereby produclng a protectlve curtain of alr to prevent drlft.
In the device of the present invention there are some signiflcant lmprovements over that dlsclosed and clalmed ln U.S.
Patent No. 5,062,572.
It ls therefore an ob~ect of the present lnventlon to produce a less expenslve, more efflcient drlft control system which reduces updraft, drlft and drip whlle still permitting the nozzles of the wet spray boom to be readlly vlslble to the operator.
Summary of the Inventlon ~herefore, this lnvention seeks to provide a spray shield deflector for use with an agrlcultural llquid sprayer and adapted to be mounted on wet spray booms equipped with a plurality of spray nozzles; sald sprayer belng adapted to spray when sald booms are in the field position transverse to the directlon of travel; sald shield comprislng, an arcuate hollow elongate structure mounted parallel to said boom; said shield lncludlng at least one alr inlet; sald shleld further comprlslng at least one upper alr outlet and at least one lower alr outlet, sald lower alr 21371~8 720~1-45 outlet belng located downwardly and rearwardly from said upper air outletS sald shield further comprlsing an arcuate convex upper side and an arcuate concave underslde; sald underslde belng non-contlnuous and comprlslng a flrst upper arcuate portlon above sald upper alr outlet and a second lower arcuate portion between sald upper alr outlet and said lower alr outlet.
The spray shleld of the present lnventlon ls a cost effectlve way for controlllng spray drlft wlthout causlng spray to accumulate on the shleld or deflector. The system also provldes the operator wlth an unobstructed view of the nozzles. The shlelds or deflectors can be hlnged so that they can be fllpped up from the back, thereby allowlng the operator to access the nozzles from behlnd. Hlnges also allow the deflectors to clear obstacles wlthout damage.
The system works by deflectlng the lncomlng wlnd downwardly toward the ground, thereby permlttlng the spray droplets that would normally be carrled away by the horizontal wlnd, to be deposlted on the ground or plants, relatlvely unaffected by the wlnd. The spray will enter the crop canopy whlle the incoming alr ls travelllng downwardly toward the ground.
Once the droplets fall lnto thls reglon, the wlnd wlll normally not affect them.
The spray shleld or deflector of the present lnventlon appears curvlllnear ln cross sectlon. It has, in one embodlment, a slngle elongate vertically dlsposed forwardly faclng alr inlet.
When a plurality of shlelds are placed together, these air lnlets extend all the way along the wet spray boom, and open slightly forwardl~ of the booms and nozzles.
~1371~8 In a second embodlment of the inventlon the spray shleld ls constructed such that lt does not have to depend on forward velocity of the vehlcle or a headwlnd to produce downwardly dlrected air currents. In the second embodiment the hollow shield deflectors are connected at their upper portlon to at least one alr channel or tube which ls connected to a prlmary alr dlstrlbution tube. The prlmary alr dlstrlbutlon tube ls connected to an alr blower which brlngs alr from the outslde of the system and forces lt through the alr shleld deflectors of the present lnvention. This embodiment of the invention is particularly useful when there ls no headwlnd, or the vehlcle ls movlng slowly, or there ls a strong tailwlnd.
In operatlon, the arcuate underslde of the shield catches the wlnd as the machine moves forwardly and produces a first air current or vein which reduces updraft. This alr current or vein descends rearwardly of the sprayed llquld.
A second current of alr or alr vein ls dlrected downwardly and rearwardly through upper air outlets. The velocity of this alr ls greater than the lncomlng air produced by headwind, movement of the machine across the land, or ln the case of the second embodlment, a blower fan. Thls second alr current helps to reduce drlp or accumulatlon of the spray droplets on the shleld.
The second set of alr outlets whlch are located rearwardly and downwardly of the first outlets create a thlrd downwardly directed air current which reduces drift of the spray.
An optlonal perforated polyurethane flexlble curtaln can be attached to the lowermost and rearmost portlon of the spray shleld deflector to aid in drift reduction.
2137~ ~8 The upper rear slde of the hollow spray shleld deflector is of a smooth curvillnear convex form and descends rearwardly and downwardly ln a manner so as to shleld the nozzles from a tallwind.
Brief Description of the Drawings The invention will be described in greater detail in con~unction with the followlng drawings wherein:
Figure 1 is a partlal top view of an agricultural sprayer on which the spray shleld deflectors of the present inventlon are mounted;
Flgure 2 is a schematic view of the present invention;
Figure 3 is a similar view to Figure 2 lllustratlng an additional embodlment of the present lnventlon;
Figure 4 is a side view of one unit of the present inventlon.;
Flgure 5 is a front view of the present lnvention;
Figure 6 ls a perspectlve exploded view of the present invention;
Figure 7 is a cross sectlon VII-VII of the sprayer ln Figure l;
Figure 8 ls a perspective view of a second embodiment of the present invention;
Flgure 9 is a perspectlve view of an alternative second embodiment of the present lnventlon; and Figure 10 is a perspective view of an alternative third embodiment of the present invention.
21~711~
Detailed Descrlption of the Invention In Figure 1 an agricultural sprayer shown generally as 10 ls e~ulpped wlth a framed cart 2 supported by wheels 4 and adapted to be towed by a power source such as a tractor 3. On the framed cart 2 is mounted a tank 5 capable of holding liquid pesticides or herbicides.
In Figure 1, a rlght maln wing boom 6 is supported by a castor wl~eel 7. Rotatably attached to main wlng boom 6 ls a dry spray boom 8 which is connected by means of struts 23,24 to a wet spray boo:m 9. Mounted on wet spray boom 9 are a plurality of unlts of the present invention shown as 1.
Figure 2 ls a partial cross section of the spray shield deflector of the present lnvention, drawn schematically and shown generally as 1. The spray shield deflector is mounted onto wet spray boolm 9 by means of rubber bushings 10 which provide needed flexibillty when spray shield 1 strlkes obstacles. A clamp 11 ls secured to the underside of spray shield 1 by means of bolts shown generally as 12. Protruding downwardly and forwardly of the wet spray boo.m are a plurallty of nozzles 13.
The normal directlon of sprayer lmplement travel in Flgure 2 ls shown wlth an arrow marked A whlle the prevalllng alr flow or wind ls shown ln the opposlte dlrectlon as arrows B. The alr or wlnd enters the hollow spray shleld deflector as the arrows lndlcate through air inlet 14. Air exits the shleld at a hlgher veloclty due to the smaller orlflces of the upper clrcular air outlet ports shown as 15. Another alr current exlts the deflector also at a hlgher velocity through outlet ports 16. The upper surface of the shield deflector ls marked 17. It ls arcuate and ~ 2137118 smooth and permits the wlnd B to move smoothly over the spray shleld deflector and not cause turbulence.
The underside of the shleld is also arcuate ln shape but non-continuous due to upper alr outlet 15. Thus, the underslde has an upper portlon 18 and a lower portlon 19, the latter being located between outlets 15 and 16.
In operatlon, as the spray lmplement moves forwardly in dlrectlon A, a flrst current of alr strlkes surface 18 and creates a downwardly movlng air veln or curtaln C whlch tends to reduce the updraft of spray partlcles 20. A second alr current or veln D
emerges through outlet 15 and reduces drip which is generally caused by spray partlcles collectlng and becoming droplets on portions :L8 and 19 of the shleld. A thlrd alr current marked E
emerges from outlet 16 and moves downwardly preventlng rearward drlft of ~roplets 20.
Thus, it can be seen in Figure 2, that very few spray droplets or partlcles 20 pass beyond the lmmedlate crop canopy below the spray shleld.
Flgure 3 has an addltlonal curtaln or strlp, shown as 21, whlch is attached at 22 to spray shield deflector 1. Thls strip ls generally made of a polyurethane-type product, approxlmal;ely 1/16" thlck. It has perforatlons of preferably 5/8"
and permll;s low veloclty alr to pass therethrough. The low veloclty ~lr shown ln Flgure 3 ls marked generally as F. In operatlon" any chemlcal spray strlklng thls curtaln would lmmedlate:Ly be wiped onto the undersides of the weed leaves.
Figure 4 is a slde view of the spray shleld l of the present invention. The labelled parts are slmilar to those found ~ 2137118 in Flgures 2 and 3. A groove marked as 29 ls adapted to seat the spray shield deflector on the wet spray boom 9.
Figure 5 ls a front vlew of the embodlment of the present inventlon shown ln Figure 4. The air lnlet opening 14 is divlded by a number of vertical structural braces 28.
Figure 6 is an exploded perspective vlew of the present invention. In thls embodlment the upper and lower alr outlets 15, 16 are unltary and elongate.
Flgure 7 ls a cross sectlon of the area shown as VII-VII of Figure 1. Struts 23 and 24 and llnkage 25 keep the spray nozzles pointlng in the same direction regardless of their height above the crop canopy. The struts 23, 24 pivot about polnts 26 and 27, strut 24 being flxedly mounted to dry spray boom 8, whlch rotates ln a bushing.
Figure 8 ls an alternatlve embodlment of the lnvention.In the first embodlment the alr lnlet 14 ls adapted to scoop up the preva:Lllng wlnd or alr, and redlrect lt through the outlets.
In Flgure 8, the alr outlets 14 are connected to a palr of enclosed alr channels 14A. These ln turn are connected to a prlmary a:Lr dlstrlbutlon tube 14B, ln whlch a blower fan 30 ls located. The blower fan 30 takes outslde alr and forces it through primary alr distribution tube 14B through vertical channels :L4A through openlngs 14 lnto the hollow elongate spray shleld de~Elector 1. Alr velns or curtalns leave upper alr exlt 15 and lower alr exlt 16. One also notes that the exlts 15 and 16 ln Figure 8 comprises one or more orifices. In Figure 8, any prevailing air or wind strlking the spray shield deflector on the concave underslde surfaces 18 and 19 is also directed downwardly, ~ 2137118 preventing updraft of the air.
Flgure g is a another perspectlve vlew of the same embodlment as shown ln Flgure 8, the only difference belng that the upper alr exlts 15 have been omltted leavlng all of the alr to exit the lower alr outlets 16.
In Figure 10, the concave undersurface 19 is contlnuous as only the lower alr outlets 16 are present.
In summary, the present inventlon is an improvement over the prlor art ln that it not only reduces drlft, but also drlp.
It ls lne:gpenslve to manufacture and use, and provldes accessibility to sprayer nozzles.
Claims (17)
1. A spray shield deflector for use with an agricultural liquid sprayer and adapted to be mounted on wet spray booms equipped with a plurality of spray nozzles;
said sprayer being adapted to spray when said booms are in the field position transverse to the direction of travel;
said shield comprising:
an arcuate hollow elongate structure mounted parallel to said boom;
said shield including at least one air inlet;
said shield further comprising at least one upper air outlet and at least one lower air outlet, said lower air outlet being located downwardly and rearwardly from said upper air outlet;
said shield further comprising an arcuate convex upper side and an arcuate concave underside;
said underside being non-continuous and comprising a first upper arcuate portion above said upper air outlet and a second lower arcuate portion between said upper air outlet and said lower air outlet.
said sprayer being adapted to spray when said booms are in the field position transverse to the direction of travel;
said shield comprising:
an arcuate hollow elongate structure mounted parallel to said boom;
said shield including at least one air inlet;
said shield further comprising at least one upper air outlet and at least one lower air outlet, said lower air outlet being located downwardly and rearwardly from said upper air outlet;
said shield further comprising an arcuate convex upper side and an arcuate concave underside;
said underside being non-continuous and comprising a first upper arcuate portion above said upper air outlet and a second lower arcuate portion between said upper air outlet and said lower air outlet.
2, A spray shield deflector as claimed in claim 1 wherein said air inlet opens forwardly facing said direction of travel.
3. A spray shield deflector as claimed in claim 1 wherein said air inlet is in communication with a blower fan, such that, in operation, forced air is blown into said shield and out said upper and lower air outlets.
4. A spray shield deflector as claimed in claim 1 wherein in operation, when said sprayer moves in the direction of travel, a first air current is directed downwardly and rearwardly of said nozzle by said first upper arcuate portion of said underside;
a second air current is directed downwardly, through said upper air outlet, rearwardly of said first air current; and a third air current is directed downwardly through said second air outlet, rearwardly of said second air current;
said first, second and third air currents being respectively adapted to reduce updraft, drip, and drift of sprayed liquid.
a second air current is directed downwardly, through said upper air outlet, rearwardly of said first air current; and a third air current is directed downwardly through said second air outlet, rearwardly of said second air current;
said first, second and third air currents being respectively adapted to reduce updraft, drip, and drift of sprayed liquid.
5. A spray shield deflector as claimed in claim 1 including a plurality of spaced apart upper air outlets and a plurality of spaced apart lower air outlets.
6. A spray shield deflector as claimed in claim 2 wherein the area of said air inlet is greater than the combined areas of said upper and lower air outlets, such that in operation the velocity of air moving out of said upper and lower outlets is greater than the velocity of air entering said air inlet.
7. A spray shield deflector as claimed in claim 2 wherein in operation said arcuate convex upper side of said shield reduces disruption of sprayed liquid and deflects the air smoothly when the prevailing wind is moving in the same direction as the direction of travel of said sprayer; and when the prevailing wind is moving opposite to the direction of travel, said upper side of said shield redirects the air stream back to its original position once the sprayer has passed.
8. A spray shield deflector as claimed in claim 2 wherein said spray nozzles, in operation, are directed downwardly and forwardly of said elongate spray boom, and said air inlet is located upwardly and directed forwardly of said spray nozzles.
9. A spray shield deflector as claimed in claim 1, wherein in operation, said upper air outlet is located rearwardly and downwardly of said nozzles.
10. A spray shield deflector as claimed in claim 2 wherein said air inlet is substantially rectangular in shape.
11. A spray shield deflector as claimed in claim 3 wherein said air inlet comprises at least one enclosed air channel, said air channel being in open communication with a primary air distribution tube which is connected to a blower fan.
12. A spray shield deflector as claimed in claim 5 wherein said upper and lower air outlets are substantially round or oval in shape.
13. A spray shield deflector as claimed in claim 1 further including a perforated thin strip of flexible material;
said strip of material being attached to said spray shield deflector rearwardly of said lower air outlet and adapted to hang downwardly, reducing the gap between said spray shield deflector and a crop canopy:
wherein, in operation, said strip permits air of low velocity l;o pass therethrough.
said strip of material being attached to said spray shield deflector rearwardly of said lower air outlet and adapted to hang downwardly, reducing the gap between said spray shield deflector and a crop canopy:
wherein, in operation, said strip permits air of low velocity l;o pass therethrough.
14. A spray shield deflector as claimed in claim 1 wherein said spray shield deflector is hingedly connected to said elongate transverse wet spray boom, such that in operation, said shield is able to move upwardly and forwardly when encountering obstacles or when the operator wishes to inspect, clean or replace spray nozzles from the rear of the implement.
15. A sprayer comprising a plurality of spray shield deflectors as claimed in claim 1.
16. A spray shield deflector adapted to be mounted on a wet spray boom of an agricultural liquid field sprayer, said shield comprising:
an arcuate hollow elongate structure mounted parallel to said boom;
said shield including at least one air inlet, said air inlet comprising an enclosed air channel;
said channel being in open communication with a primary air distribution tube which is connected to a blower fan;
said shield further comprising:
at least one air outlet;
said shield further comprising:
an arcuate convex upper side and an arcuate concave underside, wherein in operation, air stream curtains are directed downwardly through said outlet, down said arcuate concave underside and down said convex upper side, thus reducing updraft, drift and drip of sprayed liquid.
an arcuate hollow elongate structure mounted parallel to said boom;
said shield including at least one air inlet, said air inlet comprising an enclosed air channel;
said channel being in open communication with a primary air distribution tube which is connected to a blower fan;
said shield further comprising:
at least one air outlet;
said shield further comprising:
an arcuate convex upper side and an arcuate concave underside, wherein in operation, air stream curtains are directed downwardly through said outlet, down said arcuate concave underside and down said convex upper side, thus reducing updraft, drift and drip of sprayed liquid.
17. A spray shield deflector for use with an agricultural liquid sprayer and adapted to be mounted on wet spray booms equipped with a plurality of spray nozzles;
said sprayer being adapted to spray when said booms are in the field position transverse to the direction of travel;
said shield comprising:
an arcuate hollow elongate structure mounted parallel to said boom;
said shield including at least one air inlet:
said shield further comprising at least one air outlet;
said shield further comprising an arcuate convex continuous upper side and an arcuate continuous concave underside.
said sprayer being adapted to spray when said booms are in the field position transverse to the direction of travel;
said shield comprising:
an arcuate hollow elongate structure mounted parallel to said boom;
said shield including at least one air inlet:
said shield further comprising at least one air outlet;
said shield further comprising an arcuate convex continuous upper side and an arcuate continuous concave underside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002137118A CA2137118A1 (en) | 1994-12-01 | 1994-12-01 | Drift control system for sprayers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002137118A CA2137118A1 (en) | 1994-12-01 | 1994-12-01 | Drift control system for sprayers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2137118A1 true CA2137118A1 (en) | 1996-06-02 |
Family
ID=4154783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002137118A Abandoned CA2137118A1 (en) | 1994-12-01 | 1994-12-01 | Drift control system for sprayers |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2137118A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6302332B1 (en) | 1999-06-30 | 2001-10-16 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Universite Laval, Office Of Technology Transfer, Vice-Rectorat Research Laval Universitie | Method and apparatus for spraying trees, plants, etc |
| WO2012005586A3 (en) * | 2010-07-06 | 2012-03-08 | Henricus Johannes Godefridus Maria Hoeben | Field crop spray apparatus for spraying crops with liquids |
| WO2015062964A1 (en) * | 2013-10-30 | 2015-05-07 | Agco Netherlands Bv | Agricultural sprayer boom |
| CN106622718A (en) * | 2016-10-13 | 2017-05-10 | 山东农业大学 | Nozzle-embedded airflow assisting-cover cap combined type efficient spraying device |
| CN109329256A (en) * | 2018-11-30 | 2019-02-15 | 钟有糁 | Anti- drift knapsack spraying device |
| CN110063322A (en) * | 2019-05-28 | 2019-07-30 | 四川农业大学 | A kind of point band sprayer apparatus for intercropping and interplanting |
| DE102018221468A1 (en) | 2018-12-12 | 2020-06-18 | Robert Bosch Gmbh | Process for applying a spray to a field |
| CN112514878A (en) * | 2020-11-30 | 2021-03-19 | 石家庄鑫农机械有限公司 | Orchard pesticide spraying robot |
| DE102020123470A1 (en) | 2020-09-09 | 2022-03-10 | Horsch Leeb Application Systems Gmbh | Agricultural sprayer, spray liquid spraying method and agricultural sprayer |
| CN114918069A (en) * | 2022-06-08 | 2022-08-19 | 江西森阳科技股份有限公司 | Neodymium iron boron magnetism nature material's anti-oxidant spraying equipment |
| CN115104587A (en) * | 2017-03-24 | 2022-09-27 | 巴斯夫农化商标有限公司 | Drift correction during application of crop protection agents |
-
1994
- 1994-12-01 CA CA002137118A patent/CA2137118A1/en not_active Abandoned
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6302332B1 (en) | 1999-06-30 | 2001-10-16 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Universite Laval, Office Of Technology Transfer, Vice-Rectorat Research Laval Universitie | Method and apparatus for spraying trees, plants, etc |
| WO2012005586A3 (en) * | 2010-07-06 | 2012-03-08 | Henricus Johannes Godefridus Maria Hoeben | Field crop spray apparatus for spraying crops with liquids |
| US10433535B2 (en) | 2013-10-30 | 2019-10-08 | Agco Netherlands B.V | Agricultural sprayer boom |
| WO2015062964A1 (en) * | 2013-10-30 | 2015-05-07 | Agco Netherlands Bv | Agricultural sprayer boom |
| CN106622718A (en) * | 2016-10-13 | 2017-05-10 | 山东农业大学 | Nozzle-embedded airflow assisting-cover cap combined type efficient spraying device |
| CN115104587A (en) * | 2017-03-24 | 2022-09-27 | 巴斯夫农化商标有限公司 | Drift correction during application of crop protection agents |
| CN109329256A (en) * | 2018-11-30 | 2019-02-15 | 钟有糁 | Anti- drift knapsack spraying device |
| DE102018221468A1 (en) | 2018-12-12 | 2020-06-18 | Robert Bosch Gmbh | Process for applying a spray to a field |
| CN110063322A (en) * | 2019-05-28 | 2019-07-30 | 四川农业大学 | A kind of point band sprayer apparatus for intercropping and interplanting |
| CN110063322B (en) * | 2019-05-28 | 2024-02-09 | 四川农业大学 | A divide area spraying device for intercropping |
| DE102020123470A1 (en) | 2020-09-09 | 2022-03-10 | Horsch Leeb Application Systems Gmbh | Agricultural sprayer, spray liquid spraying method and agricultural sprayer |
| CN112514878A (en) * | 2020-11-30 | 2021-03-19 | 石家庄鑫农机械有限公司 | Orchard pesticide spraying robot |
| CN112514878B (en) * | 2020-11-30 | 2022-05-17 | 石家庄鑫农机械有限公司 | Orchard pesticide spraying robot |
| CN114918069A (en) * | 2022-06-08 | 2022-08-19 | 江西森阳科技股份有限公司 | Neodymium iron boron magnetism nature material's anti-oxidant spraying equipment |
| CN114918069B (en) * | 2022-06-08 | 2023-08-04 | 江西森阳科技股份有限公司 | Antioxidation spraying equipment for neodymium-iron-boron magnetic material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |