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CN-122004189-A - Pesticide spraying device

CN122004189ACN 122004189 ACN122004189 ACN 122004189ACN-122004189-A

Abstract

The invention belongs to the field of agricultural equipment, in particular to a pesticide spraying device, which comprises a carrier, wherein a pesticide box is arranged on the carrier, the pesticide box is connected with a driving pump, the driving pump is connected with an atomizing nozzle, the atomizing nozzle comprises an atomizing chamber for atomizing pesticide into liquid drops and a nozzle for spraying the liquid drops, the outer wall of the nozzle is provided with an annular inner air chamber, the inner air chamber is connected with an air supply mechanism and a bubble generating mechanism for generating bubbles, the diameter of the bubbles is larger than that of the liquid drops, an inner air curtain opening for forming an annular air curtain is formed in the bottom of the inner air chamber, the annular air curtain surrounds a liquid drop movement space, and the annular air curtain gradually contracts towards the liquid drop movement space along the gas flow direction, so that the liquid drops collide with the bubbles in the annular air curtain before reaching crops. According to the invention, the liquid drops can be sprayed out at a conventional speed, so that the atomization effect is ensured, the distance from the spray head to crops is a conventional distance, the pesticide can accurately reach the target area, and meanwhile, the splashing rate is reduced, and the pesticide waste is reduced.

Inventors

  • DONG BIN
  • LI XIAN
  • ZHANG MINGWEI
  • CHEN TINGGANG

Assignees

  • 重庆帝勒金驰通用机械股份有限公司

Dates

Publication Date
20260512
Application Date
20260416

Claims (8)

  1. 1. Pesticide sprinkler, including carrier (1), be provided with medical kit (2) on carrier (1), medical kit (2) are connected with driving pump (3), and driving pump (3) are connected with atomizer (4), its characterized in that: The atomizing nozzle (4) comprises an atomizing chamber (41) for atomizing pesticide into liquid drops and a nozzle (42) for ejecting the liquid drops; The inner air curtain device is characterized in that an annular inner air chamber (5) is arranged on the outer wall of the nozzle (42), the inner air chamber (5) is connected with an air supply mechanism (51) and an air bubble generation mechanism (52) for generating air bubbles, the diameter of each air bubble is larger than that of each liquid drop, an inner air curtain opening (54) for forming an annular air curtain (53) is formed in the bottom of the inner air chamber (5), the annular air curtain (53) surrounds the liquid drop movement space (46), and the annular air curtain (53) gradually contracts towards the liquid drop movement space (46) along the air flow direction, so that the liquid drops collide with the air bubbles in the annular air curtain (53) before reaching crops.
  2. 2. The pesticide spraying device according to claim 1, wherein an annular outer air chamber (55) is arranged on the outer wall of the inner air chamber (5), an outer air curtain opening (58) for forming an annular outer air curtain (57) is arranged at the bottom of the outer air chamber (55), the inner air chamber (5) and the outer air chamber (55) are connected with a wind supply mechanism (51) through a first air pipe and a second air pipe respectively, valves (56) are arranged on the first air pipe and the second air pipe, a wind speed sensor (6) and a controller (7) are arranged on the carrier (1), and the wind supply mechanism (51), the valves (56) and the wind speed sensor (6) are connected with the controller (7).
  3. 3. The pesticide spraying device as set forth in claim 1, wherein the bubble generating mechanism (52) is used for generating micro bubbles with a diameter of 50-500 μm, the volume of the bubbles in the annular air curtain (53) is 10% -25% of the total volume of the annular air curtain (53), and the particle size of the droplets atomized in the atomizing chamber (41) is 50-100 μm.
  4. 4. The agricultural chemical spraying device according to claim 1, wherein the air velocity of the air sprayed from the inner air curtain opening (54) is 10-20m/s and the droplet velocity sprayed from the nozzle (42) is 10-20m/s.
  5. 5. The pesticide spraying device as set forth in claim 1, wherein an annular liquid distribution chamber (514) is arranged in the inner layer air chamber (5), the liquid distribution chamber (514) is connected with a liquid storage chamber (8) through a liquid supply pump (512), bubble generating liquid is arranged in the liquid storage chamber (8), the bubble generating mechanism (52) is an annular filter screen arranged in the inner air curtain opening (54), the diameter of a filter hole of the annular filter screen is 20-200 mu m, the annular filter screen is inclined downwards from an inner hole to an outer edge, and the bottom of the liquid distribution chamber (514) is led to the inner hole edge of the upper surface of the annular filter screen through a liquid distribution channel (515).
  6. 6. The pesticide spraying device as set forth in claim 1, wherein two insulating first mounting sleeves (59) are arranged on the outer wall of the inner air curtain opening (54), annular negative electrodes (510) are arranged on the side walls of the two first mounting sleeves (59), negative voltage power supplies (511) with voltages ranging from-5 kv to-15 kv are connected to the negative electrodes (510), the annular air curtain (53) is located between the two negative electrodes (510), an insulating second mounting sleeve (43) is connected to the outlet end of the nozzle (42), annular positive electrodes (44) are arranged on the inner wall of the second mounting sleeve (43), and positive voltage power supplies (45) with voltages ranging from 5kv to 15kv are connected to the positive electrodes (44).
  7. 7. The pesticide spraying device as set forth in claim 1, wherein the air supply mechanism (51) is an air pump, and an air inlet of the air pump is provided with a filtering mechanism (513).
  8. 8. Pesticide spraying device according to claim 1, characterized in that the carrier (1) is a drone or a mobile vehicle body.

Description

Pesticide spraying device Technical Field The invention belongs to the field of agricultural equipment, and particularly relates to a pesticide spraying device. Background The existing various pesticide spraying devices comprise a pesticide box, a pump and an atomization nozzle, and pesticide is sprayed to the surfaces of crops after being atomized into tiny liquid drops by the atomization nozzle. The particle size of the liquid drop is usually inversely related to the ejection speed, the higher the speed is, the larger the shearing force is, the finer the fog drop is, the fine fog drop (50-150 μm) can uniformly cover the surface of crops, and the fog drop is easy to roll off when the fog drop is too large. Currently, the ejection speed of conventional spraying devices is typically 10-20m/s. When the fog drops reach the surface of crops, the fog drops strike the crops, kinetic energy is converted into deformation energy and rebound energy, when the speed is too high, the drop drops are broken and splashed, for example, when the striking speed is more than 6m/s, the splashing rate can reach 25-35%, and a large amount of pesticide is wasted. The relation between the speed v of the mist reaching the crop surface and the splashing rate is approximately that v=2m/s, the splashing rate is <5%, v=4m/s, the splashing rate is 10% -15%, v=6m/s, the splashing rate is 20% -25%, v=8m/s, the splashing rate is 30% -40%, and v=10m/s, the splashing rate is 45% -55%. Therefore, in the spraying process, the pesticide liquid drops are preferably sprayed at a higher speed (10-20 m/s) and reach crops at a lower speed (less than 4 m/s), so that the small and uniform spraying of the liquid drops can be ensured, and the waste caused by sputtering can be prevented. The speed of the liquid drops is gradually reduced due to the air resistance in the moving process, so that the distance from the spray head to crops can be increased to reduce the speed of the liquid drops reaching the surfaces of the crops, but moisture is continuously evaporated when the liquid drops move in the air, the evaporation rate is related to the flight time and the diameter of the fog drops, the excessive evaporation of the moisture is easily caused by the overlong moving path, the crystallization of the pesticide is caused, the effect is lost, and the larger the moving time of the fog drops is, the larger the drifting distance caused by the side wind is, so that the pesticide is difficult to effectively reach the target area. The invention patent with the application number of CN201911225565.9 discloses an air curtain type spray anti-drift device and method for a plant protection unmanned aerial vehicle, and an external wind field is blocked by a generated wind wall, so that drift of fog drops is effectively reduced. The invention patent with the application number of CN201610211697.6 discloses a multiple atomization anti-floating sprayer, a secondary atomization structure inputs a fine air column into a reaction cavity to collide with small liquid drops again to be atomized into mist drops, meanwhile, air bubbles enter the mist drops, and after the mist drops are sprayed out, the air bubbles are rapidly broken under the action of pressure difference, so that three atomization is realized, and an ideal atomization effect is obtained. In the prior art, although the drift of fog drops can be reduced by arranging an air curtain, bubbles are mixed in the drops to promote the drops to be atomized for a plurality of times, but the problem of serious splashing when the drops reach crops cannot be solved. Disclosure of Invention The invention aims to solve the technical problem of providing a pesticide spraying device, which can slow down the sputtering of pesticide droplets when reaching crops and improve the utilization rate of pesticides. In order to solve the problems, the technical scheme adopted by the invention is that the pesticide spraying device comprises a carrier, wherein a pesticide box is arranged on the carrier, the pesticide box is connected with a driving pump, the driving pump is connected with an atomizing nozzle, and the atomizing nozzle comprises an atomizing chamber for atomizing pesticide into liquid drops and a nozzle for spraying the liquid drops; The inner air curtain opening used for forming the annular air curtain is formed in the bottom of the inner air chamber, the annular air curtain surrounds the liquid drop movement space, and the annular air curtain gradually contracts towards the liquid drop movement space along the gas flow direction, so that the liquid drops collide with the air bubbles in the annular air curtain before reaching crops. Further, an annular outer air chamber is arranged on the outer wall of the inner air chamber, an outer air curtain opening for forming an annular outer air curtain is arranged at the bottom of the outer air chamber, the inner air chamber and the outer air chamber are connected with an air supply me