Bipolar contact type electrostatic spraying system of plant protection unmanned aerial vehicle

Abstract

The utility model provides a plant protection unmanned aerial vehicle bipolar contact type electrostatic spraying system, which comprises an unmanned aerial vehicle, a bipolar contact type electrostatic spraying device and a conical electrode group, the spraying device is arranged on the unmanned aerial vehicle, and the conical electrode group is arranged in a charging device and is used for generating a point discharge effect. The spraying device comprises a static electricity generating device and a spraying assembly, the static electricity generating device charges a pesticide solution through the point discharge effect generated by the conical electrode set, and the spraying assembly is used for charging the pesticide solution and atomizing the pesticide solution into fog drops to be sprayed out; the electrostatic generation device is formed by connecting two electrostatic generators in series, the two electrostatic generators are the same in voltage and opposite in polarity, and the positive polarity electrostatic generator and the negative polarity electrostatic generator are connected through a buffer inductor. And a positive output electrode and a negative output electrode of the electrostatic generator are respectively connected with the two conical electrode groups, so that the uniformity and penetrability of spraying are obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spraying, in particular to a bipolar contact electrostatic spraying system for a plant protection unmanned aerial vehicle. Background Art

[0002] In the development of agricultural drone technology, electrostatic spray systems are favored due to their high efficiency and precise spraying characteristics. However, despite the breakthroughs made in existing technologies, there are still some significant deficiencies in practical applications.

[0003] First, the existing electrostatic spray systems of plant protection drones face challenges in spray uniformity and penetration. Due to the uneven size distribution of spray droplets and the lack of sufficient penetration, the coverage of the liquid on the surface of the target object is often uneven, especially on the back and hidden parts of the target object, and the spray effect is greatly reduced. This not only affects the plant protection effect, but also leads to excessive use of pesticides, which not only increases costs, but also may have adverse effects on the environment.

[0004] Secondly, the lack of adhesion of the liquid droplets is also a significant problem of the existing electrostatic spray system. In practical applications, the liquid droplets are often easily affected by external environment such as wind and rain due to their poor adhesion, resulting in the loss of liquid and greatly reduced spraying effect. This not only reduces the prevention and control effect, but also may cause environmental pollution problems.

[0005] In addition, the structure of existing electrostatic spray systems is usually complex, which not only increases the difficulty of manufacturing and maintenance, but also increases the cost of use, thus limiting its popularity and application in agricultural production. At the same time, the complex structure may also bring safety hazards. Once a failure or improper operation occurs, it may cause damage to personnel and the environment. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the deficiencies in the prior art, the utility model provides a bipolar contact electrostatic spray system for a plant protection UAV, which solves the problems raised in the above-mentioned background technology.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the utility model is implemented through the following technical solutions: a bipolar contact electrostatic spray system for a crop protection UAV, comprising a UAV, a bipolar contact electrostatic spray device and a conical electrode group, wherein the spray device is arranged on the UAV, and the conical electrode group is installed in a charging device for generating a tip discharge effect, wherein the spray device comprises an electrostatic generating device and a spray assembly, wherein the electrostatic generating device utilizes the conical electrode group to generate a tip discharge effect to charge the pesticide solution, and the spray assembly is used to charge the pesticide solution and atomize it into droplets for spraying, wherein the electrostatic generating device comprises two electrostatic generators connected in series, wherein the voltage between the two electrostatic generators is the same and the polarity is opposite, the positive polarity electrostatic generator and the negative polarity electrostatic generator are connected via a buffer inductor, and the positive output electrode and the negative output electrode of the electrostatic generator are respectively connected to the two groups of the conical electrode groups.

[0010] Preferably, the structure of the electrostatic generating device forms a closed loop of charge transfer between the electrostatic generator, air and the ground, thereby ensuring the electrostatic balance on the drone, thereby reducing the impact on the drone flight control system and ensuring the safe operation of the drone.

[0011] The spray assembly includes a liquid medicine tank and a charging device, wherein the charging device is arranged at the liquid outlet of the liquid medicine tank, and the liquid medicine in the liquid medicine tank is output after passing through the charging device. The charging device includes the conical electrode group, a metal plate and a charging tube, wherein the conical end of the conical electrode group extends into the charging tube from the side of the charging tube, and the other end is connected to the positive output electrode or the negative output electrode of the electrostatic generator, and the metal plate is arranged on the side of the inner wall of the charging tube away from the conical electrode group.

[0012] Preferably, the conical electrode group adopts a plurality of conical structures, and the tip radius of each conical structure is extremely small to increase the electric field strength, thereby optimizing the charging effect of the pesticide solution.

[0013] Preferably, the liquid medicine tank comprises a positive liquid medicine tank and a negative liquid medicine tank, each having a liquid outlet, and the liquid outlets are respectively connected to the positive output and negative output of the electrostatic generator.

[0014] Preferably, the solutions in the positive electrode solution tank and the negative electrode solution tank are respectively charged with positive charge and negative charge when flowing out.

[0015] Preferably, the spray assembly also includes a centrifugal nozzle and a centrifugal pump, the centrifugal nozzle includes a motor and a centrifugal atomization disk, the centrifugal pump transports the medicine liquid to the centrifugal atomization disk after leaving the medicine tank, and the centrifugal atomization disk driven by the motor atomizes the medicine liquid and then settles it.

[0016] By adopting bipolar contact electrostatic spray technology, the pesticide solution forms uniformly charged droplets under the action of the electrostatic field. These droplets can better adhere to the surface of the target object, including the back and hidden parts, under the action of the electric field force, thereby achieving uniform coverage of the liquid on the surface of the target object. In addition, the design of the electrostatic generating device, including two electrostatic generators connected in series, ensures the stability and consistency of the voltage, further enhancing the uniformity of the spray.

[0017] Because charged droplets have better penetration, they can penetrate deep into the gaps and hidden places of the target object. This is because charged droplets can move more accurately and directional under the action of the electric field force, thereby improving the penetration of the spray and ensuring that the liquid medicine can reach every part of the target object.

[0018] Through the electrostatic effect, the droplets are charged, which enhances their ability to adhere to the target. In this way, even in the wind and rain, the liquid droplets can firmly adhere to the surface of the target, reducing the loss of liquid and improving the spray effect. At the same time, the design of the conical electrode group uses the tip discharge effect it produces to further enhance the strength of the electrostatic field, thereby improving the adhesion of the droplets.

[0019] (III) Beneficial effects

[0020] The utility model provides a bipolar contact electrostatic spray system for plant protection UAVs. It has the following beneficial effects:

[0021] 1. This solution significantly improves the uniformity and penetration of the spray. By adopting bipolar contact electrostatic spray technology, the pesticide solution forms uniformly charged droplets under the action of the electrostatic field. These droplets can better adhere to the surface of the target object, including the back and hidden parts, under the action of the electric field force, thereby achieving uniform coverage of the liquid on the surface of the target object. At the same time, the charged droplets have better penetration and can penetrate into the gaps and hidden places of the target object, improving the spray effect;

[0022] 2. This solution enhances the adhesion of the liquid medicine. Since the droplets carry static charge, the electrostatic attraction between them and the target object is enhanced, making it more difficult for the liquid medicine to be blown away by wind or washed away by rain. This can not only reduce the loss of liquid medicine and reduce the cost of spraying, but also improve the prevention and control effect and reduce pollution to the environment.

[0023] 3. This solution has a relatively simple structure and low manufacturing cost. Through optimized design and integration technology, the efficient integration of the electrostatic generating device and the spray component is achieved, which reduces the complexity and manufacturing cost of the system. At the same time, the simple structure also facilitates the subsequent maintenance and reduces the use cost, which is conducive to the popularization and application of the electrostatic spray system in agricultural production;

[0024] 4. This solution improves the safety during operation. Through reasonable electrical design and safety protection measures, it ensures the stability and reliability of the system during operation, and can effectively protect the safety of personnel and the environment even in severe weather conditions or when a fault occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0026] Figure 2 This is a circuit diagram of the static electricity generating device of the utility model;

[0027] Figure 3 This is a schematic diagram of the charging tube structure of the utility model.

[0028] In the figure: 11, drone; 12, positive electrode liquid tank; 13, charging tube; 14, electrostatic generating device; 15, centrifugal pump; 16, motor; 17, centrifugal atomizing disk; 22, negative electrode liquid tank; 31, power supply; 32, filter capacitor; 33, negative electrode electrostatic generator; 34, positive electrode electrostatic generator; 35, negative output; 36, positive output; 37, buffer inductor; 41, conical electrode group; 42, metal plate. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0030] The utility model provides a bipolar contact electrostatic spray system for a plant protection UAV, such as Figure 1 As shown, it includes a drone 11, a bipolar contact electrostatic spray device and a conical electrode group 41. The spray device is arranged on the drone 11, and the conical electrode group 41 is installed in the charging device for generating a tip discharge effect. The spray device includes an electrostatic generator 14 and a spray assembly. The electrostatic generator 14 uses the conical electrode group 41 to generate a tip discharge effect to charge the pesticide solution, and the spray assembly is used to charge the pesticide solution and atomize it into droplets for spraying. Figure 2 As shown, the electrostatic generating device 14 is powered by a power supply 31 connected in parallel with a filter capacitor 32. The electrostatic generating device 14 includes two electrostatic generators connected in series. The voltages of the two electrostatic generators are the same and the polarities are opposite. The positive polarity electrostatic generator 34 and the negative polarity electrostatic generator 33 are connected via a buffer inductor 37. The positive output 36 electrode and the negative output 35 electrode of the electrostatic generator are respectively connected to two groups of conical electrode groups 41. Therefore, a closed loop of charge transfer is formed between the positive and negative electrostatic generators, the air, and the ground, ensuring the electrostatic balance on the UAV 11, thereby reducing the impact on the UAV flight control system and ensuring the safe operation of the UAV 11.

[0031] The spray assembly includes a liquid medicine tank and a charging device. The charging device is arranged at the liquid outlet of the liquid medicine tank. The liquid medicine in the liquid medicine tank is discharged after passing through the charging device. Figure 3 As shown, the charging device includes a conical electrode group 41, a metal plate 42 and a charging tube 13. The conical end of the conical electrode group 41 extends into the charging tube 13 from the side of the charging tube 13, and the other end is connected to the positive output 36 electrode or the negative output 35 electrode of the electrostatic generator. The metal plate 42 is arranged on the side of the inner wall of the charging tube 13 away from the conical electrode group 41.

[0032] The conical electrode group 41 adopts multiple conical structures, and the tip radius of each conical structure is extremely small to increase the electric field strength, thereby optimizing the charging effect of the pesticide solution. The combined layout of five conical electrodes loaded in the conical electrode group 41 is the best solution. Under the conditions of spray pressure of 0.6MPa and aperture of 1mm, the charge-to-mass ratio can reach 0.46mC / kg.

[0033] The liquid medicine box includes a positive liquid medicine box 12 and a negative liquid medicine box 22, each having a liquid outlet, and the liquid outlets are respectively connected to the positive output 36 and the negative output 35 of the electrostatic generator.

[0034] The spray assembly also includes a centrifugal nozzle and a centrifugal pump 15. The centrifugal nozzle includes a motor 16 and a centrifugal atomizing disk 17. The centrifugal pump 15 transports the liquid medicine from the liquid medicine tank to the centrifugal atomizing disk 17, and the centrifugal atomizing disk 17 driven by the motor 16 atomizes the liquid medicine and then settles it.

[0035] The contact electrostatic spray method has high requirements on the insulation of the spray system. In order to prevent leakage during the transportation and atomization of the spray liquid pipeline, the medicine box, infusion tube, spray rod and atomizer disc selected by the electrostatic spray system are all made of insulating materials. The electrostatic high-voltage generator and the switches of the positive and negative output atomization units of the electrostatic spray system are controlled by an electromagnetic isolation switch. The switch contains 4 control keys, namely the main switch of the electrostatic spray system, the electrostatic high-voltage generator switch, the negative output atomization unit switch and the positive output atomization unit switch. In this way, the control of the flight control system of the drone 11 and the electrostatic spray system are completely independent, and the electrostatic spray system can be directly mounted on the plant protection drone for spraying operations without interfering with the flight control of the drone 11, which increases the applicability of the electrostatic spray system to the plant protection drone.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bipolar contact electrostatic spray system for plant protection drones, characterized by: The invention comprises an unmanned aerial vehicle (11), a bipolar contact electrostatic spray device and a conical electrode group (41), wherein the spray device is arranged on the unmanned aerial vehicle (11), the conical electrode group (41) is installed in a charging device and is used to generate a tip discharge effect, the spray device comprises an electrostatic generating device (14) and a spray assembly, the electrostatic generating device (14) uses the conical electrode group (41) to generate a tip discharge effect to charge a pesticide solution, the spray assembly is used to charge the pesticide solution and atomize it into droplets for spraying, the electrostatic generating device (14) comprises two electrostatic generators connected in series, the two electrostatic generators have the same voltage and opposite polarity, the positive polarity electrostatic generator (34) and the negative polarity electrostatic generator (33) are connected via a buffer inductor (37), the positive output (36) electrode and the negative output (35) electrode of the electrostatic generator are respectively connected to the two groups of the conical electrode groups (41), The spray assembly comprises a liquid medicine tank and a charging device, wherein the charging device is arranged at the liquid outlet of the liquid medicine tank, and the liquid medicine in the liquid medicine tank is output after passing through the charging device. The charging device comprises the conical electrode group (41), a metal plate (42) and a charging tube (13), wherein the conical end of the conical electrode group (41) extends into the charging tube (13) from the side of the charging tube (13), and the other end is connected to the positive output (36) electrode or the negative output (35) electrode of the electrostatic generator, and the metal plate (42) is arranged on the inner wall of the charging tube (13) away from the conical electrode group (41).

2. The bipolar contact electrostatic spray system for crop protection UAV according to claim 1, characterized in that: The conical electrode group (41) adopts a plurality of conical structures, and the tip radius of each conical structure is extremely small, so as to increase the electric field intensity, thereby optimizing the charging effect of the pesticide solution.

3. The bipolar contact electrostatic spray system for crop protection UAV according to claim 1, characterized in that: The liquid medicine box comprises a positive liquid medicine box (12) and a negative liquid medicine box (22), each having a liquid outlet, and the liquid outlets are respectively connected to the positive output (36) and the negative output (35) of the electrostatic generator.

4. The bipolar contact electrostatic spray system for crop protection UAV according to claim 1, characterized in that: The spray assembly further comprises a centrifugal nozzle and a centrifugal pump (15). The centrifugal nozzle comprises a motor (16) and a centrifugal atomizing disk (17). The centrifugal pump (15) transports the liquid medicine from the liquid medicine tank to the centrifugal atomizing disk (17). The centrifugal atomizing disk (17) driven by the motor (16) atomizes the liquid medicine and then allows it to settle.

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