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
• • 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

Definitions

• the invention relates to a sprayer boom comprising at least one pump for, via a number of liquid jets distributed along the boom, sending an atomised flow of liquid crop protecting agent from a storage container over a crop, and at least one blower for, via a number of air orifices in a flexible air hose extending along the boom, sending out an airflow for protecting the atomised liquid against wind drifting.
• Crop protecting agents in form of spray liquids are largely used for protecting crops against attack of e.g. fungi and insects.
• crop protecting agents are in themselves polluting to the environment, and the applied volumes per unit area therefore must be reduced to an absolute minimum.
• the spray liquid is today sent out through the liquid jets under high pressure in a cloud of finely atomised liquid.
• the extraordinarily fine liquid drops are deposited in an extremely thin layer on the crop surface so that the amount of spray liquid used can be reduced to the required quantity.
• the cloud of finely atomised spray liquid is extremely sensitive to wind drifting, and the wind can therefore relatively easily blow the cloud more or less away from the sprayed area. Thereby, the spraying becomes uneven, and damage can be made to adjoining areas.
• Patent application PCT/DK97/00325 describes a sprayer boom having round air jets disposed on a lattice boom.
• each air jet is designed in such a way that it in operation sends out a whirling airflow.
• the air jets are disposed on a fixed, flexible air hose which during operation is inflated by the positive pressure that is necessary to force the air through the air jets at the desired velocity.
• Each of these jets are formed by oblong, rigid plate parts around an oblong exhaust port extending in the longitudinal direction of the boom.
• This design is simple and inexpensive.
• the air flows out via a relatively sharp- edged orifice in close proximity to the wall of the flexible hose whereby the air cannot obtain optimum conditions in order to be able to create an effective air curtain to protect the finely atomised spray liquid against wind drifting.
• the object of the invention is to provide a sprayer boom of the kind mentioned in the opening paragraph, the flexible air hose of which is arranged in such a way that the air blown out through the air hose during operation is made to create an optimally effective air curtain.
• a second object of the invention is to arrange the flexible air hose in such a way that its exhaust ports can be adapted to a given task quickly and easily.
• a nozzle is fitted around at least one of the air orifices of the flexible hose.
• the outflow of the air will advantageously take place at a distance from the wall of the flexible hose.
• the nozzle can be shaped as a connection piece which is made of rubber or plastic and welded or glued onto the flexible hose.
• connection piece When a connection piece is made of a relatively flexible rubber or plastic, it cooperates easily with the flexible hose during operation without any risk of this hose being damaged during this .
• connection pieces with internal and/or external thread so that they can be furnished with other detachably exchangeable nozzles.
• the thread can e.g. be round thread.
• the nozzle can also be a conic jet mounted directly on the flexible hose or screwed onto a threaded connection piece on the hose.
• a conic jet mounted directly on the flexible hose or screwed onto a threaded connection piece on the hose.
• the nozzle can moreover be shaped in many different ways.
• the nozzle can in this way e.g. have a flat outlet extending in the longitudinal direction of the boom. Thereby, the air is spread evenly along the boom.
• a flow body can be disposed in the nozzle for optimally regulating the flow of the air through the nozzle.
• the nozzle can be shaped as a flexible pipe having louvers on each of the sides that are facing in the longitudinal direction of the boom.
• the louvers are in this case shaped in such a way that the air advantageously is blown down towards the crop and obliquely to the sides.
• Fig. 1 is a perspective view of a sprayer boom according to the invention mounted on a tractor
• Fig. 2 is a diagrammatic sectional view through the sprayer boom in fig. 1 during spraying of a crop
• Fig. 3 is on a larger scale a fractional, axial sectional view of a threaded connection piece on a flexible air hose for the sprayer boom in figs. 1 and 2,
• Fig. 4 is an axial sectional view of an air jet screwed into the threaded connection piece in fig. 3,
• Fig. 5 is an axial sectional view of a conic jet mounted directly on the flexible air hose
• Fig. 6 is an axial sectional view of a plain connection piece mounted directly on the flexible air hose and a flow body disposed in the connection piece,
• Fig. 7 is an axial sectional view of a plain connection piece mounted directly on the flexible air hose and inclined shovels disposed in the connection piece and serving for bringing the air flowing through into rotational motion,
• Fig. 8 is an axial sectional view of a flexible pipe screwed onto the connection piece in fig. 3 and provided with louvers along two diametrically opposite sides, and Fig. 9 shows the pipe in fig. 8 but rotated 90°.
• Fig. 1 shows a sprayer boom according to the invention designated generally by the reference numeral 1.
• the sprayer boom is mounted on a tractor 2 by means of a frame 3 with a backwards facing console 4.
• a storage container 5 for a liquid crop protecting agent.
• the sprayer boom is extending to both sides of the tractor.
• a mainly horizontal flexible air hose 6 and a blower set 7 for during operation inflating the air hose and forcing the air out through the air jets.
• Fig. 2 is a diagrammatic sectional view through the main components of the sprayer boom, said components comprising partly the flexible air hose 6 having nozzles 8, partly liquid jets 9 disposed on a liquid manifold 10.
• the sprayer boom is used for treating a crop 11 with the crop protecting agent in the storage container 5.
• the crop protecting agent is by means of a pump (not shown) forced out of the liquid jets under pressure in finely atomised form down towards the crop 11.
• the blower set 7 is sending a strong airflow down towards the crop.
• the airflow sucks the finely atomised spray liquid along with it and leads the liquid, as indicated by the arrows, down into the crop.
• This phenomenon is illustrated in the figure, in which it can be seen that the liquid stream and the airflow respectively are expanding in the shape of a fan after having left the respective jets. Thereby, the liquid stream and the airflow are mixed under the jets, and the crop protecting agent is spread evenly into the crop that during this is opened by the airflow.
• Fig. 3 shows a first embodiment of the nozzle 8 in figs. 1 and 2 in form of a threaded connection piece 12 having internal and external round threads 13.
• the connection piece has a flange 14 which by means of welding or gluing (not shown) is joined with the wall 15 of the flexible air hose 6, only a fractional view of said wall is shown in the figure.
• connection piece 12 By means of the connection piece 12, the air is made to flow out freely at a distance from the wall 15 of the flexible air hose.
• Fig. 4 shows an example of such a second nozzle which in this case is an air jet 16.
• jets having large or small jet orifices can be inserted.
• a plain conic jet 17 is mounted directly on the wall 15 of the flexible air hose 6.
• the jet orifice can be adapted by shortening the conical jet by a big or small bit.
• Fig. 6 shows a plain, cylindrical connection piece 18 which is also mounted directly on the wall 15 of the flexible air hose 6.
• connection piece there is by means of flat transverse sections 20 disposed a drop-shaped flow body 19 for ensuring the air a mainly laminar flow through the connection piece and a simultaneously advantageous acceleration of the flow velocity.
• Fig. 7 shows a second plain, cylindrical connection piece 21 mounted directly on the wall 15 of the flexible air hose 6.
• connection piece In the connection piece are disposed inclined shovels 22 for bringing the air flowing through into whirling motion.
• a nozzle is shown in fig. 8 and in fraction in fig. 9 in form of an air pipe 23 screwed onto the threaded connection piece 12 in fig. 3.
• the pipe is closed by means of a bottom 24.
• the pipe is provided with a number of louvers 25 that guide the airflow downwards and to the sides along the boom.
• the air pipe 23 can besides the louvers 25 also have one or more jets (not shown) disposed on its bottom 24.
• the pipe can furthermore be bent expediently in relation to the configuration of the discharged liquid cloud.
• the invention is described above and shown in the drawing on the assumption that the nozzles were round.
• the nozzles can however have any other suitable cross sectional shape.
• connection pieces do not have to have the same cross sectional shape in their entire longitudinal extension. They can e.g. be round at the joint with the flexible hose and flat at the outlet.
• the threaded connection pieces are provided with round thread. In other cases, they can be provided with other kinds of threads or with other means for detachable mounting of other nozzles.
• the material the nozzles are made of can be rubber or plastic, as mentioned. But for the manufacture, other suitable materials can also be used, e.g. metal.

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)

Applications Claiming Priority (3)

Publications (1)

Family

ID=8088679

Family Applications (1)

Country Status (3)

Families Citing this family (10)

Family Cites Families (2)

• 2000
  • 2000-01-05 WO PCT/DK2000/000004 patent/WO2000042840A1/en not_active Application Discontinuation
  • 2000-01-05 EP EP00900213A patent/EP1148780A1/de not_active Withdrawn
  • 2000-01-05 AU AU19653/00A patent/AU1965300A/en not_active Abandoned

Non-Patent Citations (1)

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