Brittle water bomb pesticide, preparation method and application device

Abstract

The invention relates to a brittle water bomb pesticide, a preparation method and an application device. The fragile water elastic pesticide comprises a liquid pesticide composition, a sealing bag body and a water-soluble film from inside to outside, wherein the sealing bag body is formed by a fragile degradable film wrapping the liquid pesticide composition, and the water-soluble film wraps the outer side of the sealing bag body. The brittle water bomb pesticide is used for solving the technical problem that a common single-layer brittle water bomb pesticide is broken in advance due to mechanical external force in the transportation and putting process, so that accurate and effective release of the pesticide at the moment of impacting a target is realized. In addition, the invention also discloses a preparation method and an application device of the brittle water bomb pesticide. The application device ensures that the brittle water bomb pesticide is kept complete in the transportation process through accurate regulation and control, and fixed-point release of the pesticide is realized due to inner membrane rupture at the moment of target collision, so that the technical problems of drifting, poor penetrability, non-uniform deposition and easiness in breakage of the brittle water bomb pesticide before release in the traditional unmanned aerial vehicle pesticide application are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of pesticide technology, specifically to a brittle water-based pesticide, its preparation method, and its application device. Background Technology

[0002] Traditional drone spraying involves atomizing liquid pesticides with high-pressure nozzles before spraying. However, the downwash and natural wind generated during drone flight can cause fine droplets to drift, resulting in pesticide waste and environmental pollution. When dealing with tall, densely canopied crops, the droplets struggle to penetrate the canopy effectively, with most of the pesticide being trapped by the upper leaves, leading to poor control of pests and diseases in the lower and inner parts of the crop. Furthermore, traditional contact sprays are ineffective against pests and diseases residing on the undersides of leaves or in the soil, as they cannot directly reach the target.

[0003] To address these issues, some studies have attempted to use single-layer water-based pesticide delivery. However, to ensure effective rupture upon impact with the target, the coating must possess extremely high brittleness. This brittleness, however, makes the membrane highly susceptible to premature breakage during the vibration, compression, and collisions of drone transport and delivery systems, leading to pesticide leakage. Furthermore, traditional biodegradable membranes have poor water resistance; directly encapsulating water-based pesticides can easily result in internal dissolution, causing storage instability. Therefore, ensuring the water-based pesticide's brittleness upon impact while maintaining its mechanical integrity during transport remains a critical technical challenge in this field.

[0004] Therefore, there is an urgent need in the existing technology to develop a new type of water-based pesticide and its matching application device that can effectively solve the problem of premature breakage during transportation and application, and achieve precise controlled release of pesticides, while retaining the advantages of water-based pesticide application. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a brittle water-based pesticide. This brittle water-based pesticide is used to solve the technical problem that ordinary single-layer brittle water-based pesticides break prematurely due to mechanical external forces during transportation and application, thereby achieving precise and effective release of pesticides at the moment of impact with the target.

[0006] The second objective of this invention is to provide a method for preparing brittle water-based pesticides.

[0007] A second objective of the present invention is to provide an application device for brittle water-based pesticides.

[0008] The technical solution of the present invention to solve the above-mentioned technical problems is: A brittle water-based pesticide comprises a three-layer structure from the inside out, wherein the three layers are a liquid pesticide composition, a sealed capsule formed by a brittle and biodegradable film encapsulating the liquid pesticide composition, and a water-soluble film covering the outside of the sealed capsule.

[0009] Preferably, the brittle biodegradable film is composed of one or more of starch-based materials, cellulose derivatives, and polylactic acid, and the thickness of the brittle biodegradable film is 20-100 micrometers; the brittle biodegradable film also contains an additive for adjusting brittleness and degradation properties, the additive including one or more of plasticizers, wetting agents, or nanofillers, the additive being used to adjust the elongation at break of the brittle biodegradable film to below 5%.

[0010] Preferably, the water-soluble membrane is composed of one or more of polyvinyl alcohol and hydroxypropyl methylcellulose, and the thickness of the water-soluble membrane is 10-50 micrometers.

[0011] Preferably, the liquid pesticide composition comprises an immediate-release agent and / or a sustained-release microcapsule agent, wherein the sustained-release microcapsule agent is a microcapsule with fumigation effect.

[0012] Preferably, the overall diameter of the brittle water-based pesticide is 5-20 mm.

[0013] A method for preparing a brittle water-based pesticide includes the following steps: S1: The brittle biodegradable membrane material is blown or drip-molded into a sealing capsule, and the inner wall of the sealing capsule forms a hydrophobic interface, and the wall thickness of the sealing capsule is 20-100 micrometers. S2: Fill the sealed capsule with the liquid pesticide composition; S3: A water-soluble film is wrapped around the outside of the filled sealed capsule to form the brittle water-bomb pesticide.

[0014] An application device for brittle water-based pesticides includes a water-based pesticide storage tank mounted on a drone and an airflow delivery device, wherein... The water-based pesticide storage tank has a through-hole at the top, and a baffle plate is provided outside the inlet. The bottom of the water-based pesticide storage tank, near the side of the airflow dispensing device, has a through-hole. The area near the outlet is conical, and a first discharge pipe is connected to the lower side of the outlet. The first discharge pipe has at least one section with a conical cross-section that is wider at the top and narrower at the bottom. A water-based pesticide transport pipe is connected to the lower part of the first discharge pipe, and the end of the water-based pesticide transport pipe is connected to the airflow dispensing device. The airflow dispensing device includes a fan, a second feeding pipe, a gas-solid mixing pipe, and a return pipe. The upper end of the second feeding pipe is connected to the water-based pesticide transport pipe, and the lower end is connected to the gas-solid mixing pipe. The fan is installed at one end of the gas-solid mixing pipe, with the fan's outlet facing the interior of the gas-solid mixing pipe. The end of the gas-solid mixing pipe away from the fan is connected to the return pipe. An air inlet is provided below the end of the water-based pesticide storage tank away from the fan, and the other end of the return pipe is connected to the air inlet.

[0015] Preferably, the gas-solid mixing tube is provided with a drug outlet at its end, and a distributor is connected below the drug outlet.

[0016] Preferably, the bottom of the drone's support frame is connected to two sets of support columns, and the bottom ends of both sets of support columns are connected to a water tank; the top of the water tank has two water inlets, and the water tank is equipped with a baffle above each water inlet; the bottom of the water tank has a drain outlet in the center, and the drain outlet is connected to a drain pipe, which is arranged in a bent shape and has a valve installed in it.

[0017] Preferably, an atomizing module is connected to the bottom of the drain pipe; the atomizing module includes a rotary motor and a centrifugal atomizing spray disc disposed below the rotary motor, wherein the rotary motor is used to drive the centrifugal atomizing spray disc to work.

[0018] Compared with the prior art, the present invention has the following advantages: 1. This invention employs a double-layer membrane structure design of "water-soluble protective outer membrane + brittle functional inner membrane" and combines it with hydrophobic isolation treatment of the inner membrane, thereby effectively preventing the internal water-based pesticides from dissolving the capsule and achieving physicochemical stability of brittle water-based pesticides during long-term storage. Among them, the outer water-soluble membrane has good toughness and tensile strength in the dry state. During UAV transportation, airflow conveying and mechanical vibration, the outer water-soluble membrane bears and absorbs the main mechanical stress, thereby effectively preventing premature breakage of the brittle inner membrane.

[0019] 2. This invention combines the impact kinetic energy of water-based pesticides with the pesticide release mode to achieve a synergistic effect of physical impact and chemical control. The downward impact force of the water-based pesticide helps to penetrate the canopy. At the same time, the liquid pesticide contains fumigation microcapsules, which can form a high concentration of pesticide gas locally after rupturing at the impact point. This produces an excellent fumigation effect on pests and diseases in hidden parts such as the underside of leaves and the base of roots and stems. This multi-mode action of "impact + fumigation" greatly expands the scope of control, and is especially suitable for complex pests and diseases that are difficult to control with conventional spraying.

[0020] 3. This invention optimizes the delivery path of water-based pesticides by setting up an airflow-type delivery device. After the water-based pesticides exit from the first discharge pipe, they smoothly transition to the second discharge pipe via an inclined water-based pesticide transport pipe, thus shortening the free fall distance. Subsequently, the airflow generated by the fan can buffer the falling water-based pesticides, preventing them from directly impacting the pipe wall and causing damage. On the other hand, it provides power to the water-based pesticides, allowing them to be smoothly delivered to the discharge port below, thereby achieving reliable transportation of water-based pesticides inside the device.

[0021] 4. This invention, by setting up a return pipe, guides part of the airflow at the end of the gas-solid mixing pipe back to the water-based pesticide storage tank, forming an airflow circulation system. The synergistic effect of this airflow circulation system is that: on the one hand, the return airflow continuously sweeps the outlet, thereby effectively preventing blockage; on the other hand, it forms a dynamic circulating air field in the water-based pesticide storage tank to optimize the internal flow field environment. This achieves efficient utilization of airflow and comprehensively improves the dispensing efficiency of water-based pesticides by promoting the orderly flow of water-based pesticides.

[0022] 5. This invention integrates a water mist spraying system (e.g., water tank, drain pipe, atomization module) and achieves coordinated control with the water-based pesticide dispensing mechanism to construct a highly efficient and precise pesticide application control system. Preferably, a surfactant is added to the water mist, its core function being to reduce the surface tension of the water mist droplets, causing them to rapidly spread and penetrate upon contact with the outer membrane of the pesticide, thereby inducing the outer membrane of the pesticide to absorb water and swell. This process causes a sharp decrease in the tensile strength of the outer membrane, completely eliminating its mechanical support and protection for the inner membrane. The aforementioned coordinated control mechanism achieves precise timing and functional matching: before the pesticide leaves the airflow dispensing device, it relies on the intact outer membrane structure for stable protection, thus preventing premature damage to the inner membrane and the internal pesticide; when the pesticide contacts the target, the outer membrane has completely failed due to the aforementioned swelling effect. At this point, the inner membrane, utilizing its own material brittleness, ruptures instantly under impact load, thereby achieving precise release and targeted application of the pesticide, effectively improving application efficiency and targeting, and avoiding pesticide waste. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the application device for the brittle water-based pesticide of the present invention.

[0024] Figure 2 This is a front view structural diagram of the application device for the brittle water-based pesticide of the present invention.

[0025] Figure 3 This is a front cross-sectional view of the application device for the brittle water-based pesticide of the present invention.

[0026] Figure 4This is a side view of the application device for the brittle water-based pesticide of the present invention. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0028] Example 1 See Figure 1 The brittle water-based pesticide of the present invention has an overall diameter of 5-20 mm. This brittle water-based pesticide comprises a three-layer structure from the inside out. The three layers are a liquid pesticide composition, a sealed capsule formed by a brittle, biodegradable film encapsulating the liquid pesticide composition, and a water-soluble film covering the outside of the sealed capsule. The brittle biodegradable film is composed of one or more of starch-based materials, cellulose derivatives, and polylactic acid, and has a thickness of 20-100 micrometers. The brittle biodegradable film also contains additives for adjusting brittleness and degradation properties, including one or more of plasticizers, wetting agents, or nanofillers, which are used to adjust the elongation at break of the brittle biodegradable film to below 5%. The water-soluble membrane is composed of one or more of polyvinyl alcohol and hydroxypropyl methylcellulose, and the thickness of the water-soluble membrane is 10-50 micrometers. The liquid pesticide composition comprises an immediate-release agent and / or a sustained-release microcapsule agent, wherein the sustained-release microcapsule agent is a microcapsule with fumigation effect.

[0029] The preparation method of the brittle water-bomb pesticide of the present invention includes the following steps: Step S1: Prepare a brittle, biodegradable sealing capsule (inner membrane); 100 parts by weight of polylactic acid (PLA) granules were weighed, and a small amount of stearic acid hydrophobic modifier was added. The mixture was melt-blended and granulated using a twin-screw extruder at 160-180℃ to obtain modified PLA masterbatch. The obtained modified PLA masterbatch was fed into a pelletizing machine, heated to a molten state, and then dripped into a spherical mold through a precision nozzle. After cooling and forming, a hollow spherical sealed capsule (i.e., a brittle biodegradable inner membrane) with a uniform wall thickness of about 20 micrometers and hydrophobic inner wall was obtained. By precisely controlling the cooling rate and crystallinity, the elongation at break of the brittle biodegradable inner membrane was controlled to be below 3%, ensuring that it has extremely high brittleness without outer membrane protection, laying the foundation for subsequent impact rupture and precise drug release. Step S2: Fill with liquid pesticide composition; Preparation of the liquid pesticide composition: By weight percentage, 10% immediate-release imidacloprid soluble concentrate, 15% slow-release thiazophos microcapsule suspension, 1% wetting agent, and 74% deionized water are mixed evenly to form a stable suspension system. Thanks to the hydrophobic modification treatment of the PLA capsule (inner membrane) in step S1, this liquid pesticide suspension system will not cause internal erosion of the PLA capsule (inner membrane), ensuring that the capsule does not soften and remains morphologically stable during storage. Subsequently, using an automated filling device equipped with a micro-injection needle, under inert gas protection, 0.2 ml of the prepared pesticide composition is quantitatively injected into the hollow PLA capsule (inner membrane) obtained in step S1. After injection, the injection port is quickly sealed by hot pressing to obtain a filled and sealed capsule.

[0030] Step S3: Coat with a water-soluble outer membrane; The filled and sealed capsules obtained in step S2 are immersed in an 8% polyvinyl alcohol (PVA) aqueous solution at 50°C. After 3 seconds, they are pulled out at a uniform speed and immediately placed in a 40°C circulating hot air drying oven for 5 minutes to form a uniform, water-soluble outer membrane (i.e., PVA outer membrane) with a thickness of about 30 micrometers on the surface of the capsule. The PVA outer membrane has excellent toughness and impact resistance in the dry state, and can provide reliable protection for the brittle PLA capsule (inner membrane) before the water-based pesticide is transported and applied, preventing it from breaking prematurely.

[0031] Example 2 See Figures 1-4 The application device for the brittle water-based pesticide of the present invention includes a water-based pesticide storage box 2 mounted on a drone 1 and an airflow delivery device.

[0032] See Figures 1-4 The upper part of the water-based pesticide storage tank 2 is provided with a feed inlet 3, and a baffle plate 4 is provided on the outside of the feed inlet 3. The bottom of the water-based pesticide storage tank 2 is provided with a discharge hole 5 on the side near the airflow delivery device. The periphery of the discharge hole 5 is a conical guide structure, and the lower end of the discharge hole 5 is connected to a first discharge pipe 6. The first discharge pipe 6 has at least one section with a conical conveying section with a cross-section that is wider at the top and narrower at the bottom. The lower part of the first discharge pipe 6 is connected to a water-based pesticide transport pipe 7. The end of the water-based pesticide transport pipe 7 is connected to the airflow delivery device. During operation, a sufficient amount of brittle water-based pesticide is filled into the water-based pesticide storage tank 2 through the feed inlet 3, the baffle plate 4 is closed to complete the feeding, and then the drone 1 carries the application device to fly over the target crop area and accurately delivers the water-based pesticide to the target position through the airflow delivery device.

[0033] See Figures 1-4The airflow-type dispensing device includes a fan 8, a second dispensing pipe 9, a gas-solid mixing pipe 10, and a return pipe 11. The upper end of the second dispensing pipe 9 is connected to the water-based pesticide delivery pipe 7, and the lower end is connected to the gas-solid mixing pipe 10. The fan 8 is installed at one end of the gas-solid mixing pipe 10. The air outlet of the fan 8 faces the interior of the gas-solid mixing pipe 10, and the end of the gas-solid mixing pipe 10 away from the fan 8 is connected to the return pipe 11. With the above arrangement, after the water-based pesticide is output from the first dispensing pipe 6, it smoothly transitions to the second dispensing pipe 9 through the inclined water-based pesticide delivery pipe 7, which can shorten the free fall distance of the water-based pesticide. The airflow generated by the fan 8 can, on the one hand, buffer and protect the falling water-based pesticide, thereby preventing it from directly impacting the pipe wall and causing damage, and on the other hand, provide conveying power for the water-based pesticide, smoothly conveying it to the end outlet 13, so as to ensure the stable delivery of the water-based pesticide inside the application device.

[0034] See Figures 1-4 The water-based pesticide storage tank 2 has an air inlet 12 extending through its lower part on the side away from the blower 8; the other end of the return pipe 11 is connected to the air inlet 12; through the return pipe 11, part of the airflow at the end of the gas-solid mixing pipe 10 is guided back into the interior of the water-based pesticide storage tank 2 to form a closed airflow circulation system. This circulating airflow continuously blows through the discharge port 5, thereby effectively preventing the accumulation and blockage of water-based pesticides; on the other hand, it forms a dynamic circulating air field inside the water-based pesticide storage tank 2, optimizing the flow field environment inside the tank, and promoting the orderly falling of water-based pesticides while making efficient use of airflow, thus improving the overall smoothness of water-based pesticide feeding and operating efficiency.

[0035] See Figures 1-4 The gas-solid mixing pipe 10 is provided with a drug outlet 13 at its end, and a distributor 14 is connected below the drug outlet 13.

[0036] See Figures 1-4 The bottom of the support frame of the UAV 1 is connected to two sets of support columns 15, and the bottom ends of the two sets of support columns 15 are connected to a water tank 16. The top of the water tank 16 has two water inlets 17, and each water inlet 17 is equipped with a baffle plate 18 above it. The bottom center of the water tank 16 has a drain outlet 19. The drain outlet 19 is connected to a valve 20 and a drain pipe 21 in sequence below it. Working fluid is added to the water tank 16 through the water inlets 17, and the valve 20 controls the opening and closing of the drain pipe 21.

[0037] See Figures 1-4The drain pipe 21 is arranged in a bent manner, which can make the spraying area of ​​the atomizing module cover the distribution range of the water-based pesticide of the distributor 14. The water-based pesticide output from the distributor 14 can be moistened by the atomizing module, thereby completing the pre-dissolution of the water-soluble film on the outer layer of the water-based pesticide.

[0038] See Figures 1-4 The atomizing module is installed at the bottom of the drain pipe 21. The atomizing module includes a rotary motor 22 and a centrifugal atomizing spray disc 23 located below the rotary motor 22. With the above configuration, the fine water mist generated by the atomizing module pre-dissolves the water-soluble film on the outer layer of the water-based pesticide during its descent. This process ensures that the brittle inner film of the water-based pesticide only breaks when it hits the target. This avoids premature film rupture and release of the pesticide in non-target areas. Furthermore, by adjusting the amount of water mist sprayed and the timing of the operation, it can be adapted to different environmental humidity and crop canopy thicknesses, thereby significantly improving the accuracy of pesticide application and adaptability to different working conditions.

[0039] See Figures 1-4 The working principle of the application device for the brittle water-based pesticide of the present invention is as follows: During crop application, workers add brittle water-based pesticides through the inlet 3 into the water-based pesticide storage tank 2, and then close the baffle plate 4. After the addition is completed, the drone 1 is started, and the application device is driven by the drone 1 to the application area. The water tank 16 needs to be pre-filled with an organosilicon surfactant solution with a mass fraction of 0.1%-0.5% to reduce the surface tension of the spray liquid.

[0040] Upon reaching the application area, the blower 8 is turned on. The high-speed airflow generated by the blower 8 enters the gas-solid mixing pipe 10. Part of the airflow carries the water-based pesticide to the outlet 13, while the other part flows back through the return pipe 11 and the air inlet 12 to the bottom of the water-based pesticide storage tank 2, thus creating a dynamic circulating airflow field within the tank. This dynamic circulating airflow field can buffer and guide the falling water-based pesticide, preventing it from accumulating and clogging. On the other hand, the returning airflow in this dynamic circulating airflow field can continuously purge the discharge port 5, ensuring smooth discharge. Simultaneously, the valve 20 is opened and the rotary motor 22 is started. The organosilicon surfactant solution in the water tank 16 flows through the drain pipe 21 to the centrifugal atomizing spray plate 23, where the organosilicon surfactant solution is atomized by high-speed rotation to form a uniform and fine water mist.

[0041] Under the combined action of gravity and internal circulating airflow, the water-based pesticide in the water-based pesticide storage tank 2 flows sequentially through the discharge hole 5, the first discharge pipe 6, and the water-based pesticide transport pipe 7, and smoothly enters the second discharge pipe 9 of the airflow dispensing device. In the gas-solid mixing pipe 10, the water-based pesticide is accelerated and transported by the mainstream airflow generated by the fan 8. At this time, the outlet 13 at the end of the gas-solid mixing pipe 10 opens, and the water-based pesticide is discharged through the outlet 13 under the drive of the airflow, and is evenly dispersed by the distributor 14 below the outlet 13.

[0042] During the descent of the water-based pesticide, it first passes through the water mist area generated by the centrifugal atomizing spray disc 23. Due to the low surface tension of the water mist droplets, the tiny water mist droplets spread rapidly and penetrate into the interior of the water-soluble membrane after contacting the surface of the water-based pesticide, causing the membrane material to rapidly absorb water and swell. This physicochemical process can rapidly and significantly reduce the tensile strength of the outer membrane, causing the outer membrane to instantly lose its original mechanical protection ability, but it does not completely dissolve and disappear, thus ensuring that the pre-dissolution effect is rapid and controllable.

[0043] The pre-dissolved water-based pesticide continues to fall under its own gravity, penetrating the crop canopy and finally impacting the target. Because the water-soluble film on the outside of the water-based pesticide has softened and failed, its brittle capsule inside breaks instantly upon impact due to its high brittleness, causing the encapsulated liquid pesticide composition to be released instantly, thereby achieving precise application and fumigation control of the target pests and diseases.

[0044] After the pesticide application is completed, turn off the blower 8, the rotary motor 22 and the valve 20 in sequence; the water-based pesticide can be replenished to the water-based pesticide storage tank 2 through the feed inlet 3, or the device can be cleaned and maintained.

[0045] The above describes preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above description. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention.

Claims

1. A brittle water-based pesticide, characterized in that, It comprises a three-layer structure from the inside out, namely a liquid pesticide composition, a sealing capsule formed by a brittle and biodegradable film encapsulating the liquid pesticide composition, and a water-soluble film covering the outside of the sealing capsule.

2. The brittle water-based pesticide for drone delivery according to claim 1, characterized in that, The brittle biodegradable film is composed of one or more of starch-based materials, cellulose derivatives, and polylactic acid, and the thickness of the brittle biodegradable film is 20-100 micrometers. The brittle biodegradable film also contains an additive for adjusting the brittleness and degradation properties. The additive includes one or more of plasticizers, wetting agents, or nanofillers, and the additive is used to adjust the elongation at break of the brittle biodegradable film to below 5%.

3. The brittle water-based pesticide for drone delivery according to claim 2, characterized in that, The water-soluble membrane is composed of one or more of polyvinyl alcohol and hydroxypropyl methylcellulose, and the thickness of the water-soluble membrane is 10-50 micrometers.

4. The brittle water-based pesticide for drone delivery according to claim 3, characterized in that, The liquid pesticide composition comprises an immediate-release agent and / or a sustained-release microcapsule agent, wherein the sustained-release microcapsule agent is a microcapsule with fumigation effect.

5. The brittle water-based pesticide for drone delivery according to claim 4, characterized in that, The overall diameter of the brittle water-based pesticide is 5-20 mm.

6. A method for preparing a brittle water-based pesticide, characterized in that, The preparation of the brittle water-based pesticide as described in any one of claims 1 to 5 comprises the following steps: S1: The brittle biodegradable membrane material is blown or drip-molded into a sealing capsule, and the inner wall of the sealing capsule forms a hydrophobic interface, and the wall thickness of the sealing capsule is 20-100 micrometers. S2: Fill the sealed capsule with the liquid pesticide composition; S3: A water-soluble film is wrapped around the outside of the filled sealed capsule to form the brittle water-bomb pesticide.

7. An application device for the brittle water-based pesticide according to any one of claims 1 to 5, characterized in that, This includes a water-based pesticide storage tank and an airflow delivery device mounted on the drone. The water-based pesticide storage tank has a through-hole at the top, and a baffle plate is provided outside the inlet. The bottom of the water-based pesticide storage tank, near the side of the airflow dispensing device, has a through-hole. The area near the outlet is conical, and a first discharge pipe is connected to the lower side of the outlet. The first discharge pipe has at least one section with a conical cross-section that is wider at the top and narrower at the bottom. A water-based pesticide transport pipe is connected to the lower part of the first discharge pipe, and the end of the water-based pesticide transport pipe is connected to the airflow dispensing device. The airflow dispensing device includes a fan, a second feeding pipe, a gas-solid mixing pipe, and a return pipe. The upper end of the second feeding pipe is connected to the water-based pesticide transport pipe, and the lower end is connected to the gas-solid mixing pipe. The fan is installed at one end of the gas-solid mixing pipe, with the fan's outlet facing the interior of the gas-solid mixing pipe. The end of the gas-solid mixing pipe away from the fan is connected to the return pipe. An air inlet is provided below the end of the water-based pesticide storage tank away from the fan, and the other end of the return pipe is connected to the air inlet.

8. The application device for brittle water-based pesticides according to claim 7, characterized in that, The gas-solid mixing tube is provided with a drug outlet at its end, and a distributor is connected below the drug outlet.

9. The application device for brittle water-based pesticides according to claim 8, characterized in that, The drone's support frame has two sets of support columns connected to its bottom, and the bottom ends of both sets of support columns are connected to a water tank. The top of the water tank has two water inlets, and a baffle plate is provided above each water inlet. The bottom center of the water tank has a drain outlet, which is connected to a drain pipe. The drain pipe is arranged in a bent shape and has a valve installed in it.

10. The application device for brittle water-based pesticides according to claim 9, characterized in that, The bottom of the drain pipe is connected to an atomizing module; the atomizing module includes a rotary motor and a centrifugal atomizing spray disc disposed below the rotary motor, wherein the rotary motor is used to drive the centrifugal atomizing spray disc to work.

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