Plant protection unmanned aerial vehicle anti-drift spray head

Abstract

The utility model belongs to the technical field of agricultural plant protection equipment, especially relates to a plant protection unmanned plane anti-drift pesticide nozzle, including air inlet seat, wind shield, pressurized nozzle and atomization nozzle. Air inlet seat is equipped with air inlet component. Wind shield is equipped with air inlet channel. Pressurized nozzle includes nozzle main part and spray orifice. Atomization nozzle includes nozzle main part, liquid spray channel and liquid spray hole. Nozzle main part is connected to one end of wind shield, liquid spray channel is arranged in nozzle main part and is connected with spray orifice, liquid spray hole is arranged in one end of nozzle main part and is connected with liquid spray channel. The plant protection unmanned plane anti-drift pesticide nozzle provided by the application blocks lateral airflow through the wind shield, forms high speed annular airflow barrier in combination with air inlet component and air inlet channel, wraps up mist drop and guides it to fall vertically, the arc liquid spray hole design makes mist drop distribution more concentrated, reduces edge drift, target area pesticide coverage is more sufficient, and improves the prevention and treatment effect.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural plant protection equipment technology, and in particular relates to a pesticide drift prevention nozzle for plant protection drones. Background Technology

[0002] In traditional agricultural plant protection operations, drone spraying of pesticides has become an efficient and convenient method. However, existing plant protection drone spray heads have some shortcomings in practical applications:

[0003] During the spraying process, due to factors such as the airflow from the drone, natural wind, and uneven particle size of the pesticide, some of the pesticide will form fine droplets and drift to non-target areas, resulting in insufficient pesticide coverage in the target area and reducing the control effect. Utility Model Content

[0004] The purpose of this invention is to provide a pesticide drift prevention nozzle for agricultural drones, aiming to solve the technical problem in the prior art where pesticide liquid forms fine droplets that drift to non-target areas, resulting in insufficient pesticide coverage in the target area and reduced control effect.

[0005] To achieve the above objectives, the pesticide drift prevention nozzle for agricultural drones provided in this embodiment includes an air inlet, a wind shield, a pressurizing nozzle, and an atomizing nozzle. The air inlet is connected to the outside of the wind shield, and both the pressurizing nozzle and the atomizing nozzle are connected to the wind shield. The pressurizing nozzle is disposed on one side of the atomizing nozzle.

[0006] The air intake seat is provided with an air intake assembly, which is connected to the windproof cover;

[0007] The windproof cover is provided with an air intake channel, which is connected to the air intake assembly;

[0008] The pressurizing nozzle includes a nozzle body and a spray hole. The nozzle body is connected inside the windproof cover, and the spray hole is located in the middle of the nozzle body and is connected to the air intake channel.

[0009] The atomizing nozzle includes a nozzle body, a spray channel, and a spray hole. The nozzle body is connected to one end of the windproof cover. The spray channel is disposed inside the nozzle body and communicates with the spray hole. The spray hole is disposed at one end of the nozzle body and communicates with the spray channel.

[0010] As an optional solution of this utility model, a support rod is fixedly connected to the bottom side of the air intake seat.

[0011] As an optional solution of this utility model, the air intake component includes a first air intake hole and a second air intake hole, the first air intake hole and the second air intake hole are concentrically arranged, and the diameter of the first air intake hole is larger than that of the second air intake hole.

[0012] As an optional solution of this utility model, the air intake channel includes a first air intake channel and a second air intake channel, the first air intake channel and the second air intake channel are arranged concentrically, and the diameter of the first air intake channel is larger than that of the second air intake channel.

[0013] As an optional embodiment of this utility model, the first air intake channel is connected to the second air intake hole, and the second air intake channel is connected to the spray hole.

[0014] As an optional solution of this utility model, both the spray hole and the liquid spraying hole are connected to the liquid spraying channel, and the liquid spraying hole is arranged in an arc shape.

[0015] As an optional solution of this utility model, a striker is provided in the air intake channel. The striker is movably inserted through the wind shield and sequentially inserted through the first air intake channel and the second air intake channel. The end of the striker near the pressurizing nozzle is conical. A sealing ring is provided at the connection between the striker and the wind shield, and the sealing ring is fixedly connected to the wind shield.

[0016] The above-mentioned technical solutions in the pesticide drift prevention nozzle for agricultural drones provided in this embodiment of the utility model have at least one of the following technical effects:

[0017] The pesticide drift prevention nozzle for agricultural drones provided in this application uses a wind shield to block lateral airflow, and the high-speed annular airflow barrier formed by the air intake component and air intake channel wraps the droplets and guides them to fall vertically. The arc-shaped spray hole design makes the droplet distribution more concentrated, reduces edge drift, and provides more sufficient pesticide coverage in the target area, thereby improving the control effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A perspective view of the pesticide drift prevention nozzle for agricultural drones provided in this embodiment of the utility model.

[0020] Figure 2 A perspective view of the pesticide drift prevention nozzle for agricultural drones provided in this embodiment of the utility model.

[0021] Figure 3 A side view of the pesticide drift prevention nozzle for agricultural drones provided in this embodiment of the present invention.

[0022] Figure 4 for Figure 3 Sectional view along AA.

[0023] The following are the labeling elements in the figure:

[0024] 1. Air intake seat; 3. Wind shield; 4. Pressurizing nozzle; 5. Atomizing nozzle; 6. Support rod; 7. Strike pin;

[0025] 11. First air intake; 12. Second air intake;

[0026] 31. First air intake passage; 32. Second air intake passage;

[0027] 41. Nozzle body; 42. Spray hole;

[0028] 51. Nozzle body; 52. Spray channel; 53. Spray hole. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0033] In one embodiment of this utility model, such as Figures 1-4 As shown, a pesticide drift prevention nozzle for agricultural drones is provided, including an air inlet 1, a wind shield 3, a pressurizing nozzle 4, and an atomizing nozzle 5. The air inlet 1 is fixedly connected to the outside of the wind shield 3, and both the pressurizing nozzle 4 and the atomizing nozzle 5 are fixedly connected to the wind shield 3, with the pressurizing nozzle 4 located on one side of the atomizing nozzle 5.

[0034] An air intake assembly is provided on the air intake seat 1, and the air intake assembly is connected to the wind shield 3.

[0035] The wind shield 3 is equipped with an air intake channel, which is connected to the air intake assembly.

[0036] The pressurizing nozzle 4 includes a nozzle body 41 and a nozzle orifice 42. The nozzle body 41 is fixedly connected inside the windproof cover 3, and the nozzle orifice 42 is located in the middle of the nozzle body 41 and is connected to the air intake channel.

[0037] The atomizing nozzle 5 includes a nozzle body 51, a spray channel 52, and a spray hole 53. The nozzle body 51 is connected to one end of the windproof cover 3. The spray channel 52 is located inside the nozzle body 51 and is connected to the spray hole 42. The spray hole 53 is located at one end of the nozzle body 51 and is connected to the spray channel 52.

[0038] The pesticide drift prevention nozzle for agricultural drones provided in this application uses a wind shield 3 to block lateral airflow, and a high-speed annular airflow barrier formed by the air intake assembly and air intake channel to wrap the droplets and guide them to fall vertically. The arc-shaped spray hole 53 design makes the droplet distribution more concentrated, reduces edge drift, and provides more sufficient pesticide coverage in the target area, thereby improving the control effect.

[0039] Working process: Outside air enters the air intake channel of the windproof cover 3 through the air intake assembly on the air intake seat 1, forming a high-speed airflow. The high-speed airflow is accelerated at the nozzle 42 of the pressurized nozzle 4, forming a local negative pressure zone. The negative pressure zone draws the liquid medicine in from the spray channel 52 and mixes it with the high-speed airflow. The mixed gas and liquid are further broken up at the nozzle 53 of the atomizing nozzle 5, forming fine droplets that are sprayed out. The windproof cover 3 reduces interference from the external airflow, while the barrier formed by the high-speed airflow envelops the droplets, reducing their susceptibility to environmental wind forces and thus reducing drift.

[0040] In another embodiment of this utility model, a support rod 6 is fixedly connected to the bottom side of the air intake seat 1 to facilitate the installation and fixation of the windproof cover 3.

[0041] In another embodiment of this utility model, the air intake assembly includes a first air intake 11 and a second air intake 12, which are concentrically arranged. The diameter of the first air intake 11 is larger than that of the second air intake 12. The first air intake 11 (large diameter) introduces the main airflow, forming a low-speed protective air curtain around the nozzle, reducing the interference of external lateral airflow on the droplets. The second air intake 12 (small diameter) accelerates the airflow through the Venturi effect, forming a high-speed core airflow, enhancing the droplet settling kinetic energy and suppressing drift. The high-speed airflow of the second air intake 12 generates a strong negative pressure at the pressurized nozzle 4, efficiently entraining the liquid into the spray channel 52, achieving gas-liquid mixing and preliminary atomization. The dual airflow layers form a "soft shell" structure, maintaining the spray pattern in crosswind conditions and ensuring that the droplets are vertically deposited to the target area.

[0042] In another embodiment of this utility model, the air intake channel includes a first air intake channel 31 and a second air intake channel 32, which are concentrically arranged. The diameter of the first air intake channel 31 is larger than that of the second air intake channel 32. The first air intake channel 31 is connected to the second air intake hole 12, and the second air intake channel 32 is connected to the nozzle 42. The first air intake channel 31 (large diameter) guides the main airflow entering from the first air intake hole 11, forming a low-speed annular air curtain around the droplets and resisting interference from external lateral airflow. The second air intake channel 32 (small diameter) delivers the high-speed auxiliary airflow entering from the second air intake hole 12, which directly acts on the pressurized nozzle 4, achieving liquid injection and atomization through high-speed jet. The difference in diameter between the two channels creates a pressure gradient: the first channel maintains a lower air pressure (approximately 0.1-0.2 MPa) to form a stable air curtain, while the second channel maintains a higher air pressure (approximately 0.3-0.5 MPa) to provide atomization kinetic energy and ensure gas-liquid mixing efficiency. The concentric structure of the first air intake channel 31 and the second air intake channel 32 ensures that the airflow direction of the inner and outer layers is consistent, avoids the formation of turbulence, reduces the risk of liquid backflow into the air intake system, and enhances the stability of the nozzle in complex airflow environments.

[0043] In another embodiment of this invention, both the spray hole 42 and the spray nozzle 53 are connected to the spray channel 52, with the spray nozzle 53 being arc-shaped. When the gas-liquid mixture passes through the arc-shaped spray nozzle 53, the fluid is forced to flow along the curve, generating centrifugal force. This centrifugal force further breaks the liquid into finer droplets, resulting in a more uniform droplet distribution and improved atomization quality. The arc-shaped structure guides the droplets to form a fan-shaped spray at a specific angle, expanding the coverage area while maintaining droplet density. Compared to the traditional straight spray hole 42, the arc-shaped design reduces the drift of edge droplets, making the droplets more concentrated in the target area. The streamlined design at the outlet of the arc-shaped spray nozzle 53 makes the initial velocity direction of the droplets closer to vertically downward, reducing the initial velocity component in the horizontal direction and lowering the risk of drift. The vortex effect formed by the high-speed airflow within the arc-shaped channel further encapsulates the droplets, enhancing their resistance to wind interference.

[0044] In another embodiment of this utility model, a striking pin 7 is provided in the air intake channel. The striking pin 7 is movably inserted through the wind shield 3 and sequentially inserted through the first air intake channel 31 and the second air intake channel 32. The end of the striking pin 7 near the pressurizing nozzle 4 is conical. A sealing ring is provided at the connection between the striking pin 7 and the wind shield 3, and the sealing ring is fixedly connected to the wind shield 3. The liquid medicine is pre-broken at the inlet of the pressurizing nozzle 4, dispersing large particles of liquid medicine into fine droplets, thus optimizing the initial atomization effect. When the high-speed airflow passes through the air intake channel, it causes the striking pin 7 to vibrate at high frequency, further refining the droplets and preventing agglomeration, making the droplet size more concentrated in the anti-drift range (150-400μm). The reciprocating motion of the striking pin 7 (amplitude of about 0.5-1mm) effectively removes impurities or crystals in the channel, avoiding blockage of the nozzle 42 due to liquid medicine deposition. The streamlined design of the conical head reduces fluid resistance and prevents solid particles from being trapped. The sealing ring is made of fluororubber material resistant to pesticide corrosion, ensuring the sealing performance at the moving gap of the impact pin 7. The sealing ring structure fixed to the wind shield 3 prevents liquid pesticide from seeping into the air intake system, avoiding a decrease in atomization efficiency due to air path contamination.

[0045] The pesticide drift prevention nozzle for agricultural drones provided in this application uses a wind shield 3 to block lateral airflow, and a high-speed annular airflow barrier formed by the air intake assembly and air intake channel to wrap the droplets and guide them to fall vertically. The arc-shaped spray hole 53 design makes the droplet distribution more concentrated, reduces edge drift, and provides more sufficient pesticide coverage in the target area, thereby improving the control effect.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pesticide drift spray nozzle for agricultural drones, characterized in that, It includes an air intake base, a wind shield, a pressurizing nozzle, and an atomizing nozzle. The air intake base is connected to the outside of the wind shield, and both the pressurizing nozzle and the atomizing nozzle are connected to the wind shield. The pressurizing nozzle is located on one side of the atomizing nozzle. The air intake seat is provided with an air intake assembly, which is connected to the windproof cover; The windproof cover is provided with an air intake channel, which is connected to the air intake assembly; The pressurizing nozzle includes a nozzle body and a spray hole. The nozzle body is connected inside the windproof cover, and the spray hole is located in the middle of the nozzle body and is connected to the air intake channel. The atomizing nozzle includes a nozzle body, a spray channel, and a spray hole. The nozzle body is connected to one end of the windproof cover. The spray channel is disposed inside the nozzle body and communicates with the spray hole. The spray hole is disposed at one end of the nozzle body and communicates with the spray channel.

2. The pesticide drift prevention nozzle for agricultural drones according to claim 1, characterized in that, A support rod is fixedly connected to the bottom side of the air intake seat.

3. The pesticide drift prevention nozzle for agricultural drones according to claim 1, characterized in that, The air intake assembly includes a first air intake port and a second air intake port, which are concentrically arranged, and the diameter of the first air intake port is larger than that of the second air intake port.

4. The pesticide drift prevention nozzle for agricultural drones according to claim 3, characterized in that, The air intake channel includes a first air intake channel and a second air intake channel, which are concentrically arranged, and the diameter of the first air intake channel is larger than that of the second air intake channel.

5. The pesticide drift prevention nozzle for agricultural drones according to claim 4, characterized in that, The first air intake channel is connected to the second air intake port, and the second air intake channel is connected to the nozzle.

6. The pesticide drift prevention nozzle for agricultural drones according to claim 1, characterized in that, Both the spray nozzle and the liquid spraying hole are connected to the liquid spraying channel, and the liquid spraying hole is arranged in an arc shape.

7. The pesticide drift prevention nozzle for agricultural drones according to claim 4, characterized in that, The air intake channel is equipped with a striker, which is movably inserted through the wind shield and sequentially inserted through the first air intake channel and the second air intake channel. The end of the striker near the pressurizing nozzle is conical. A sealing ring is provided at the connection between the striker and the wind shield, and the sealing ring is fixedly connected to the wind shield.

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