69 results about "Spray drift" patented technology

Spray drift during the application of agricultural chemicals is reduced by incorporating a self-emulsifiable ester into the liquid to be sprayed.

Spray drift during the application of agricultural chemicals is reduced by incorporating microencapsulated oils into the aqueous solution or mixture to be sprayed.

The invention relates to a prediction method for aerial spray drift of a helicopter based on a model, belonging to the technical field of agricultural aerial sprays. According to the method, atomization surfaces of an agricultural helicopter and a nozzle are simulated, a to-be-predicted domain and boundary conditions of the to-be-predicteddomain are determined, the Fluent is run so as to obtain a wind field formed on the atomization surfaces after the air flow generated by the movement and a rotor wing of a spraying helicopter is blocked by the main body of the helicopter, and variations of pesticide liquid concentration and pesticide liquid density in each of grids of the to-be-predicted domain in the boundary conditions can be simulated through iterative operation so as to obtain the deposition distribution of the pesticide liquid droplet and predict the aerial spray drift of the helicopter. According to the invention, the CFD (computational fluid dynamics) thoughts are applied to the technical field of the agricultural aerial sprays, and the deposition distribution, the drift range and the like of the pesticide liquid to be aerially sprayed can be quickly and effectively simulated, thereby creating conditions for accurately, safely, conveniently and quickly evaluating the agricultural aerial spray operation.

The invention relates to a manufacturing technology of a suspending agent with a strong spray-drift prevention function. The suspending agent is prepared from the following components by weight percentage: 1-50% of pesticide active ingredient, 1-60% of a composite anti-drift agent, 1-10% of a dispersing agent, 1-10% of an emulsifying agent, 1-10% of a wetting agent, 0.1-2% of a thickening stabilizer,1-10% of an anti-freezing agent, 0.1-1% of a defoaming agent and the balance being water. The manufacturing technology comprises the following steps of weighing the pesticide active ingredient, the dispersing agent, the wetting agent, the thickening stabilizer,the defoaming agent, the anti-freezing agent and water according to the proportions, feeding the components into an agitated vessel, carrying out shear mixing uniformly, then introducing the mixture into a sand mill to carry out sanding, and then adding the thickening stabilizer and the composite anti-drift agent after qualified grain size is obtained by sanding, and shearing again to form a product. According to the manufacturing technology, the feeding operation is convenient, the process is simple, and safe and environment-friendly effects are achieved.

Spray drift during the application of an aqueous mixture of glyphosate and an herbicide is reduced by incorporating certain tertiary amine or tertiary amine oxide surfactants into the aqueous solution or mixture to be sprayed.

Spray drift during the application of agricultural chemicals is reduced by incorporating a monosaccharide or a mixture of monosaccharides into the liquid to be sprayed and by spraying the resulting liquid through a flat fan or straight stream nozzle without a deflector. Average spray droplet sizes are increased and the percentage of driftable spray droplets (<150 microns) produced are reduced.

Disclosed herein are methods and compositions for reducing or inhibiting spray drift and driftable fines.

This invention relates to a stirring rotor with spray-drifting ability for refining Mg alloy. The stirring rotor comprises a rotor body with vent pipes, a hollow vent axis with the top side connected with vent pipes and the bottom side connected with rotor body, a big driving wheel located on the vent axis and connected with driving device, and a bearing seat located on the vent axis. The rotor body is fixed with vent axis. On the bottom of rotor body, main vents are arranged radially and uniformly and connected with vent pipes. The apparatus contains a rotor with double vent pipes, the gas in the pipes are broken into fine and dispersible bubbles through rotating the rotor, the bubbles dispersing in the Mg alloy melt can carry gas and impurities in the Mg alloy melt to the surface of the melt, and the Mg alloy is refined through the above process.

An aqueous agricultural composition includes a pesticide, water, and a co-polymer. The co-polymer is the reaction product of an acrylamide monomer and a macromonomer. The acrylamide monomer and the macromonomer react together in the absence of an anionic monoethylenically unsaturated monomer including an acidic group chosen from —COOH, —SO₃H, —PO₃H₂ and associated salts. The disclosed aqueous agricultural composition may be incorporated into agricultural spray operations and demonstrates effective reduction of driftable droplets.

The invention discloses a plant oil emulsifying emulsifier composition. In percent by weight, the plant oil emulsifying emulsifier composition comprises 5-25% of fatty acid ester or alkyl benzenesulfonic acid and 75-95% of maleic anhydride modified plant oil or a reaction product of the maleic anhydride modified plant oil and polyether. The invention further discloses a preparation method of the plant oil emulsifying emulsifier composition. The plant oil emulsifying emulsifier composition has a good plant oil emulsifying effect, and obtained self-emulsified plant oil has long-term storage stability and excellent emulsifying performance; meanwhile, as a tank mixing aid, the self-emulsified plant oil formed by mixing the plant oil emulsifying emulsifier composition and the plant oil can increase the fogdrop particle size, reduce spray drift, dissolve wax layers on the surfaces of a target and a target crop, improve the penetration rate of a pesticide on the target or a target plant, enhance the bactericidal effect and increase the cation density, and facilitates deposition of the pesticide on the target.

The invention discloses a field spraying droplet drift test method and a drift droplet receiving device. The test method is characterized by comprising steps: multiple test points are distributed in a downwind direction area in a plant protection machinery pesticide spraying target area; more than one hanging ropes in a straight pull state is arranged in each test point for absorbing droplets; an aqueous solution containing a fluorescent tracer of a certain condensation is used for replacing pesticide to be put in a pesticide spraying box of the plant protection machinery; after the plant protection machinery completes spraying on the target area, the hanging rope is got back; and through detecting the information of the fluorescent tracer on the hanging rope in each test point, the drift deposition amount of the sprayed droplets is calculated and analyzed. The field spraying droplet drift test method is easy to execute, the operation is convenient, the droplet drift test working efficiency can be effectively improved, and promotion and use are facilitated.

The invention discloses a pesticide spraying drifting prevention method and system of a pesticide spraying unmanned aerial vehicle and a storage medium. The pesticide spraying drifting prevention method comprises the steps of obtaining wind speed information of the unmanned aerial vehicle during pesticide spraying; establishing a relational database of the wind speed information and a spraying pressure, and matching the spraying pressure of a nozzle according to the acquired wind speed information through the database; establishing a fogdrop particle stress model, and analyzing fogdrop position information according to the fogdrop particle stress model; comparing and analyzing the fogdrop position information to obtain a deviation ratio, and judging whether the deviation ratio is greater than a preset deviation ratio threshold value or not; and if yes, calculating a drifting distance of the fog drops, generating correction information, and correcting the motion trail of the fog drops through the correction information.

The present invention relates to an aqueous agrochemical spray solution containing an agrochemical active and a surfactant. The spray solution comprises a dispersed phase comprising dispersed particles which have an average particle size between 1 to 100 microns and the concentration of said dispersed particles is from about 0.001 to 5 wt %. The aqueous agrochemical spray solution is capable of reducing the volume of the fine droplets in mist whose size is less than 150 microns during spraying by at least 20% compared to the same aqueous spray solution without the presence of the surfactant. The present invention also relates to a method of reducing the spray drift of an aqueous agrochemical spray solution upon spraying with a spraying apparatus. The method includes adding the surfactant to the aqueous agrochemical spray solution in an amount effective to form the dispersed phase.

The invention relates to a spray drift performance testing device. The spray drift performance testing device comprises a simulation chamber, a gas rectifier, an atomizing nozzle, a measuring module, a drift acquisition unit and a control cabinet. Both ends of the simulation chamber are provided with an air inlet and an air outlet. The gas rectifier is arranged on the side close to the air inlet in the simulation chamber to form a uniform air field in the simulation chamber. The upper portion of the simulation chamber is provided with a guide rail. The atomizing nozzle and the measuring module are slidably arranged on the guide rail. The drift acquisition unit is arranged on the side close to the air outlet in the simulation chamber. The measuring module is connected to the control cabinet. The control cabinet is connected to the drift acquisition unit, an air inlet mechanism and an air outlet mechanism. The spray drift performance testing device can establish a controllable standard test environment for testing the drift performance of droplet and collected related data can provide accurate set parameters for actual operations of a sprayer, so that spray liquid waste is reduced and pesticide pollution to the environment is accordingly reduced.

Th invention provides a nicosulfuron and fluoroglycofen-ethyl compounded formula, which is a post-emergence herbicide for a corn field and is characterized by being prepared by the following components: 1.0-8.0% of nicosulfuron and 0.1-10.0% of fluoroglycofen-ethyl. The formula improves the effective component content to the maximum, enlarges insecticidal spectrum, makes up for the defects of low broadleaf weed control effect and slow response of the nicosulfuron, and prevents phytotoxicity caused by spray drift when other hormone herbicides ( such as 2-4,D and the like) are mixed with the nicosulfuron for use.

Aqueous adjuvant concentrate with improved spray drift properties and method for its preparation comprising the steps of: i) dissolving from 15 to 30% by weight, on the weight of the final concentrate, of ammonium sulfate in water; ii) adding to the solution from 1 to 10% by weight, on the weight of the final concentrate, of anionic esters of alkyl polyglycosides; iii) dispersing in the solution from 2 to 10% by weight, on the weight of the final concentrate, of hydroxypropyl guar or hydroxypropyl guar acetate; iiii) adding ammonium sulfate to the dispersion to reach an ammonium sulfate final concentration comprised between 33 and 40% by weight.

The invention discloses an apparatus for testing a spray drift distance of a plant-protection unmanned aerial vehicle. The apparatus includes a frame. A fan, a spray head, a wind sensor, a fan regulation control button, a water collection plate, a collecting tank, a flowmeter, a variable frequency pump, and a water tank are disposed on the frame. The wind sensor monitors a wind scale of the fan. The fan regulation control button controls start and stop of the fan and a wind magnitude. A middle cross bar is disposed between the top and the bottom of the frame, the water collection plate is disposed on the middle cross bar, the collecting tank is installed outside the middle cross bar, and an end of the water collection plate extends into the collecting tank. A baffle is disposed at the topof the frame and around the middle cross bar to the top of the frame except a side on which the collecting tank is installed. The apparatus realizes a spray drift distance test of an unmanned aerial vehicle spray head under different scales of wind indoors, avoids complexity and result uncertainty of an outdoor flight test, and provides effective test data for spray performance and a wind resistance class of the unmanned aerial vehicle spray head. In addition, the invention further discloses a method for testing the spray drift distance of the plant-protection unmanned aerial vehicle.