Aviation Electrostatic Spraying Device and System

Abstract

The present invention provides an aviation electrostatic spraying device and system, relating to the field of spraying technology. The aviation electrostatic spraying device includes: a nozzle head, which includes a motor and a spray disc arranged on one side of the motor; an induction part, the distance between the induction part and the spray disc along the axial direction of the spray disc is less than a first preset distance, wherein, an insulating layer is coated on the outer surface of the induction part; an electrostatic generator, one of its electrodes is connected to the induction part, and the other electrode is connected to the grounding end of the aviation electrostatic spraying device, so as to form an induction electric field between the induction part and the spray disc to make the spray passing through the induction electric field be induced with charges opposite to those of the induction part; a fan device, arranged on the side of the motor away from the spray disc, configured to generate a wind field towards the spray disc direction, so that the spray ejected from the spray disc is far away from the induction part. A strong induction electric field can be formed to improve the charge effect of the spray, and leakage or conduction between the induction part and the nozzle head can be avoided, so as not to affect the electrostatic spraying effect, and the targeted spraying effect can also be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of spraying, and in particular to an aviation electrostatic spraying device and system. Background Art

[0002] With the development of technology, automated spraying technology has been widely applied to various complex crop protection scenarios (ground and aviation operations), greatly improving the operation efficiency, but the utilization rate of pesticides still needs to be improved. For plants with a certain depth, it is difficult for droplets to adhere to hidden parts of the plants, resulting in unsatisfactory pest and disease control effects.

[0003] Electrostatic spraying technology uses the electrostatic effect to make droplets adhere to hidden parts of plants, which can effectively improve the droplet adhesion effect, increase the deposition rate of droplets on the front and back of the target, and thus improve the utilization rate of pesticides.

[0004] However, most of the existing electrostatic spraying devices are contact charging, directly connecting the high-voltage electrostatic generator to the liquid medicine in the medicine tank or the metal nozzle, which requires very high insulation for the entire system and is not suitable for use in the aviation plant protection system. Corona charging uses the principle of tip discharge to make the droplets ejected from the nozzle combine with ions in the air, thus carrying charges. It requires a very high voltage, usually above 20,000 volts, and the charging effect is not good, so it is also not suitable for use in the aviation plant protection system. Moreover, the existing electrostatic spraying devices are mainly pressure nozzles with contact electrostatic induction, which require high structural requirements, and there are few electrostatic spraying technologies for centrifugal nozzles. Summary of the Invention

[0005] The purpose of the present invention is to provide an aviation electrostatic spraying device and system to solve the technical problem of poor spraying effect of the existing aviation electrostatic spraying devices.

[0006] The aviation electrostatic spraying device provided by the present invention includes:

[0007] A nozzle, the nozzle includes a motor and a spray disc arranged on one side of the motor;

[0008] An induction part, the distance between the induction part and the spray disc along the axial direction of the spray disc is less than a first preset distance, wherein the outer surface of the induction part is coated with an insulating layer;

[0009] An electrostatic generator, one electrode of which is connected to the induction part, and the other electrode is connected to the ground terminal of the aviation electrostatic spraying device, so as to form an induction electric field between the induction part and the spray disc to make the spray passing through the induction electric field induced with charges opposite to those of the induction part;

[0010] The fan device is arranged on the side of the motor away from the spray disc and is configured to generate a wind field towards the spray disc, so that the spray ejected from the spray disc is away from the induction part.

[0011] Further, the induction part is coaxially arranged with the spray disc, and the distance between the inner side edge of the induction part and the outer side edge of the spray disc in the radial direction of the spray disc is less than a second preset distance.

[0012] Further, the induction part is fixed to the outer shell of the motor through a bracket, wherein the bracket is made of an insulating material, and the bracket is detachably connected to the induction part.

[0013] Further, the bracket is arranged on the side of the spray disc close to the fan device and is integrally formed with the outer shell of the motor.

[0014] Further, the water inlet of the spray disc and the bracket are arranged inside the induction part in a matching manner.

[0015] Further, the fixing position between the bracket and the motor is adjusted along the axial direction of the motor.

[0016] Further, the fan device is a propeller arranged on the side of the motor away from the spray disc.

[0017] Further, the insulating layer is composed of at least one layer of cross-linked polyethylene or silicone rubber, and epoxy resin is coated on the surface, and the thickness of the insulating layer is 1-3 millimeters.

[0018] The object of the present invention also lies in providing an aviation electrostatic spraying system, which includes the aviation electrostatic spraying device as described in the present invention arranged in pairs on a frame, and the electrode polarities of the induction parts of the two aviation electrostatic spraying devices are opposite.

[0019] Further, the grounding ends of the two aviation electrostatic spraying devices are respectively connected to the frame, or respectively connected to the grounding end of the power supply of the aviation electrostatic spraying system.

[0020] The aviation electrostatic spraying device and the aviation electrostatic spraying system provided by the present invention, through the settings of the nozzle, the induction part, and the fan device, cover the induction part with an insulating layer, and send air towards the nozzle direction through the fan device, so that the distance between the induction part and the nozzle is small enough to form a strong induction electric field to improve the spray charging effect, and at the same time avoid leakage or conduction between the induction part and the nozzle, avoid affecting the electrostatic spraying effect, and improve the targeted spraying effect. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings required for the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of an aviation electrostatic spraying device in an embodiment provided by an embodiment of the present invention;

[0023] Figure 2 It is a schematic structural diagram of an aviation electrostatic spraying device in another embodiment provided by an embodiment of the present invention;

[0024] Figure 3 It is a front view of an aviation electrostatic spraying device in another embodiment provided by an embodiment of the present invention;

[0025] Figure 4 It is a schematic structural diagram of a bracket in an aviation electrostatic spraying device in another embodiment provided by an embodiment of the present invention;

[0026] Figure 5 It is a front view of a bracket in an aviation electrostatic spraying device in another embodiment provided by an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of an aviation electrostatic spraying system in an embodiment provided by an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of an aviation electrostatic spraying system in another embodiment provided by an embodiment of the present invention.

[0029] Icons: 1 - nozzle; 11 - motor; 12 - spray disc; 13 - water inlet of the spray disc; 2 - induction part; 21 - insulating layer; 3 - electrostatic generator; 4 - bracket; 41 - fixing part; 42 - extension part; 43 - fastener; 100 - aviation electrostatic spraying device; 101 - first aviation electrostatic spraying device; 102 - second aviation electrostatic spraying device; 200 - frame; 300 - connecting piece. Specific Embodiments

[0030] The following will clearly and initially describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] The present invention provides an electrostatic spraying device and an aviation electrostatic spraying system. Multiple embodiments are given below to describe in detail the electrostatic spraying device and the aviation electrostatic spraying system provided by the present invention.

[0032] The aviation electrostatic spraying device 100 provided in this embodiment, as Figures 1 to 4 shown, includes a nozzle 1, an induction part 2, an electrostatic generator 3, and a fan device (not shown). One electrode of the electrostatic generator 3 is connected to the induction part 2, and the other electrode is connected to the ground terminal of the aviation electrostatic spraying device 100, so as to form an induction electric field near the induction part 2 to make the spray passing through the induction electric field induce charges opposite to those of the induction part 2, and the wind field of the fan device makes the spray move in a direction away from the induction part 2, thereby achieving a better electrostatic spraying effect.

[0033] Specifically, the nozzle 1 includes a motor 11 and a spray disc 12 disposed on one side of the motor 11 and driven by the motor 11. The spray disc 12 is a centrifugal spray disc or a mist spray disc, and is integrally disc-shaped, and is connected to the spray disc 12 through a motor shaft, so as to drive the spray disc 12 to rotate at a high speed to achieve centrifugal spraying. The electrostatic generator 3, one of its electrodes is connected to the induction part 2, and the other electrode is connected to the ground terminal, so as to form an induction electric field between the induction part 2 and the spray disc 12 to make the spray passing through the induction electric field induce charges opposite to those of the induction part 2. Wherein, the ground terminal can be the nozzle 1, so as to form an induction electric field between the induction part 2 and the spray disc 12. Further, the ground terminal is not limited to the nozzle 1, and can also be other devices or potentials far from the induction part 2, which will be described in detail later.

[0034] Further, the distance between the induction part 2 and the spray disc 12 in the axial direction of the spray disc 12 is less than a first preset distance, wherein the outer surface of the induction part 2 is coated with an insulating layer 21. It should be noted that the induction part 2 is disposed on the side of the spray disc 12 away from the crop to be sprayed, that is, the induction part 2 is disposed above the spray disc 12 and is correspondingly disposed outside the spray disc 12, so that the droplets ejected from the spray disc 12 can pass through the induction electric field formed by the two, and prevent the droplets ejected from the spray disc 12 from depositing on the induction part 2 to cause electric leakage or conduction, and prevent the induction part 2 from blocking and affecting the spraying effect. The axial distance between the induction part 2 and the spray disc 12 is less than the first preset distance, and the distance between the induction part 2 and the spray disc 12 is minimized as much as possible to increase the electric field strength, thereby improving the charging effect.

[0035] To further reduce the distance between the induction part 2 and the spray disc 12, the fan device is arranged on the side of the motor 11 away from the spray disc 12 to generate a wind field in the direction of the spray disc 12, so that the spray ejected from the spray disc 12 is away from the induction part 2, reducing the probability of the spray splashing onto the induction part 2 and causing electric leakage or conduction, thereby reducing the axial distance between the induction part 2 and the spray disc 12. To prevent the spray ejected from splashing onto the induction part 2 and causing electric leakage or conduction due to the too small distance between the induction part 2 and the spray disc 12, an insulating layer 21 is coated on the outer surface of the induction part 2 to improve the insulation effect of the induction part 2 and prevent direct conduction between the induction part 2 and the spray disc 12, ensuring the effectiveness of the induction electric field. It should be noted that the distance between the induction part 2 and the spray disc 12 in the axial direction of the spray disc is greater than the third preset distance to avoid direct conduction between the induction part 2 and the spray disc 12. Even if the insulating layer 21 is provided on the induction part 2, due to the high voltage of the electrostatic generator 3, there is still a risk of conduction. To improve the safety and effectiveness of electrostatic spraying, the axial distance between the induction part 2 and the spray disc 12 is set.

[0036] Based on the coordinated setting of the insulating layer 21 and the fan device, the distance between the induction part 2 and the spray disc 12 is minimized and optimized, which can not only improve the electric field strength but also avoid electric conduction and leakage, greatly promoting the charging effect.

[0037] Furthermore, the fan device is a propeller arranged on the side of the motor 11 away from the spray disc 12. The aviation electrostatic spraying device 100 is provided with a propeller, which is arranged on the side of the motor 11 away from the spray disc 12, that is, above the motor 11. The aviation electrostatic spraying device 100 moves by using the propeller as a power device. During the movement, the propeller, as a fan device, generates a wind field, generating a downward wind field on the nozzle 1, which can replace the fan device, making the droplets move in a direction away from the induction part 2, reducing the distance between the induction part 2 and the spray disc 12, and also making the droplets move in the direction of the crop, improving the utilization rate of the device and saving the cost of the fan device.

[0038] Through the aviation electrostatic spraying device 100 in this embodiment, through the structural design of the nozzle 1, the induction part 2, the propeller, and the electrostatic generator 3, the droplets ejected from the nozzle 1 pass through the strong induction electric field between the induction part 2 and the spray disc 12 to carry a large amount of charges, improving the charging effect, and move in a direction away from the induction part 2 (towards the crop direction) through the propeller, improving the targeted spraying effect.

[0039] In one embodiment, in order to increase the induced electric field strength and the charging effect, and also to improve the overall structural unity, the induction part 2 is coaxially arranged with the spray disc 12. Specifically, the induction part 2 is sleeved outside the motor 11 to make the overall structure more reasonable. In order to make the electric field simpler and easier to control, the induction part 2 is in a ring shape, and the induction part 2 and the spray disc 12 are concentrically arranged. The distance between the inner side edge of the induction part 2 and the outer side edge of the spray disc 12 in the radial direction of the spray disc 12 is less than a second preset distance, that is, the maximum diameter of the induction part 2 is greater than the diameter of the spray disc 12, so as to further reduce the distance between the induction part 2 and the spray disc 12 and increase the strength of the induced electric field. And in order to prevent the induction part 2 from directly conducting electricity with the spray disc 12, the distance between the inner side edge of the induction part 2 and the outer side edge of the spray disc 12 in the radial direction of the spray disc 12 also needs to be greater than a fourth preset distance.

[0040] Among them, the shape of the annular cross-section of the induction part 2 is not limited and can be rectangular, circular, elliptical, polygonal, etc. In one embodiment, the induction part 2 is arranged as a sheet-like ring, and its annular cross-section shape is a narrow rectangle, as Figure 2 shown, which can increase the contact area between the induction part 2 and the spray disc 12 and improve the charging effect. The material of the induction part 2 can be copper or stainless steel to improve the electrical conductivity.

[0041] In order to reduce the spatial distance between the induction part 2 and the spray disc 12, that is, the radial distance and the axial distance between the induction part 2 and the spray disc 12, the insulating layer 21 on the induction part 2 is composed of at least one layer of cross-linked polyethylene or silicone rubber, and epoxy resin is coated on the surface. The thickness of the insulating layer 21 is 1 to 3 millimeters. In one embodiment, the insulating layer 21 can be formed by several layers of cross-linked polyethylene or silicone rubber, and liquid epoxy resin is coated on the surface. After the epoxy resin is cured, the insulating layer 21 is formed. Among them, the thickness of the insulating layer 21 needs to be less than or equal to a preset threshold value to prevent the distance between the induction part 2 and the spray disc 12 from being too small and affecting the charging effect.

[0042] It should be noted that the above first preset distance, second preset distance, third preset distance, and fourth preset distance are all determined through a comprehensive combination of theoretical research and actual verification and are not limited here. Exemplarily, the first preset distance, second preset distance, third preset distance, and fourth preset distance can be in millimeters to improve the electrostatic induction effect. For example, the first preset distance can be 8 millimeters, the second preset distance can be 6 millimeters, the third preset distance can be 2 millimeters, and the fourth preset distance can be 1 millimeter.

[0043] To ensure that the distance between the induction part 2 and the spray disc 12 is relatively fixed, it is necessary to ensure the stability of the position of the induction part 2. The induction part 2 is fixed to the outer shell of the motor 11 through a bracket 4. The bracket 4 is detachably connected to the induction part 2. Among them. The induction part 2 is fixedly connected to the motor housing through the bracket 4. At the same time, the induction part 2 and the bracket 4 are detachably connected, which improves the applicability of the induction part 2 and can be disassembled and replaced at any time as needed. The detachable connection methods include methods such as sticking, fixing with fixing parts, and buckles, which are not limited here as long as they are convenient for disassembly and installation.

[0044] In one embodiment, the bracket 4 is arranged on the side of the spray disc 12 close to the fan device and integrally formed with the outer shell of the motor. Specifically, the bracket 4 can be arranged above the spray disc 12 and integrally formed with the outer shell of the motor 11. Refer to Figure 1 As shown, the bracket 4 is arranged at the position adjacent to the spray disc 12 and the motor housing, which improves the overall unity of the structure and makes the structure more compact. Further, the bracket 4 is arranged parallel to the upper part of the spray disc 12 to improve stability. The bracket 4 includes a fixing part 41 and an extending part 42. The fixing part 41 is fixed to the motor housing, and the extending part 42 is arranged to extend around the fixing part 41. The induction part 2 is fixedly connected through a plurality of extending parts 42, which is convenient for setting the induction part 2 to a suitable position and avoiding the distance between the induction part 2 and the spray disc 12 being too large or too small. Among them, the fixing part 41 is integrally formed with the motor housing and is arranged at a position close to the spray disc 12, while the extending part 42 extends from the periphery of the fixing part 41 and is fixedly connected to the induction part 2 to fix the induction part 2. As Figure 1 shown, the extending part 42 can include a bracket connected to the fixing part 41 and a mating part that can be detachably installed, so as to clamp the induction part between the bracket and the mating part to fix the induction part 2. The shape of the extending part 42 is not limited as long as it can detachably install the induction part 2. In an alternative embodiment, the induction part 2 with different diameters, different circular cross-sectional shapes, and cross-sectional sizes can be designed and fixedly installed on the extending part 42 replaceably, so that the sizes of the first preset distance, the second preset distance, the third preset distance, and the fourth preset distance can be adjusted as needed, thereby improving the applicability of electrostatic spraying. In another embodiment, an adjustable extending part 42 can be provided so that the extending length of the extending part 42 is adjustable, and in cooperation with different induction parts 2, the adjustment range is wider, further improving the applicability of electrostatic spraying.

[0045] Further, the water inlet 13 of the spray disc is arranged inside the induction part 2 in cooperation with the bracket 4. Refer to Figure 1As shown, since the water inlet 13 of the spray disc needs to be connected to a water pipe to inject spraying liquid into the nozzle 1, and in order to facilitate disassembly and maintenance, the water inlet is placed outside. By combining the water inlet 13 of the spray disc with the bracket 4 inside the induction part 2, the blockage of the water inlet 13 of the spray disc to the induction part 2 is avoided, making the overall structure simple, facilitating the disassembly and assembly of the water inlet, and also preventing the influence of the water inlet on the induction electric field.

[0046] In another embodiment, the fixed position between the bracket 4 and the motor 11 can be adjusted along the axial direction of the motor 11, facilitating the adjustment of the position of the induction part 2 according to the spraying situation, environmental situation, and voltage magnitude, and then adjusting the spatial distance between the induction part 2 and the spray disc 12, improving the overall applicability of the aviation electrostatic spraying device 100. Specifically, as Figure 2 - Figure 5 shown, the bracket 4 includes a fixing part 41 adapted to the motor 11 and an extending part 42 connected to the induction part 2. The fixing part 41 is sleeved on the motor 11 and is fastened or loosened by a fastener 43 to be fixed or slide along the axial direction of the motor 11. The extending part 42 extends in a direction away from the motor 11 and also extends in a direction close to the spray disc 12. Among them, the fastener 43 can be in any suitable form such as a bolt or a stud. For example, when the fastener 43 is a bolt, when the bolt is loosened, there is a gap between the fixing part 41 and the motor housing, so the bracket 4 can move along the axial direction of the motor 11 relative to the spray disc 12 in a direction close to or away from it, thereby adjusting the axial distance between the induction part 2 and the spray disc 12; when the bolt is fastened, the position of the fixing part 41 and the motor 11 housing is fixed, so that the axial distance between the induction part 2 and the nozzle 1 is also fixed. Further, the fixing part 41 includes a first arc part and a second arc part, and the curvature radii of the first arc part and the second arc part are the same as the curvature radius of the motor housing. By fastening or loosening the fastener 43, the distance between the first arc part and the second arc part is adjusted, so that it can slide along the axial direction of the motor housing.

[0047] When the radial distance between the induction part 2 and the spray disc 12 is less than the second preset distance and the axial distance is less than the first preset distance, there is a situation where the water inlet of the nozzle 1 obstructs or interferes with the induction part 2. A notch is provided on the induction part 2, as Figure 2 shown, for accommodating the water inlet, which can avoid direct contact between the water inlet and the induction part 2 causing conduction and affecting the electrostatic effect.

[0048] In addition, the induction part 2 can also be without a notch. At this time, the diameter of the inner circular ring of the induction part 2 is larger than the diameter of the spray disc 12, which can ensure that there is no interference between the entire induction part 2 and the spray disc 12, and thus there will be no interference with the water inlet.

[0049] It should be noted that the above-mentioned bracket 4 is made of an insulating material, such as any suitable insulating material like polylactic acid, etc., which has a certain mechanical strength and toughness. It can be made of a material different from that of the insulating layer 21 of the induction part 2 to further improve the insulation performance. Further, in order to improve the insulation effect, the outer shell of the motor 11 is made of an insulating material to prevent conduction, leakage and other phenomena caused by the connection between the induction part 2 and the motor outer shell.

[0050] In one embodiment, an electrode of the electrostatic generator 3 is connected to the induction part 2, so that a strong electric field will be generated around the induction part 2. The distance between the induction part 2 and the spray disc 12 is extremely small (the axial distance is less than the first preset distance, and the radial distance is less than the second preset distance). When the liquid film before the liquid ejected from the spray disc 12 breaks to form droplets passes through the area of the induction part 2, it will be induced with charges opposite to the polarity of the induction part 2. Thus, the droplets after the liquid film breaks will be charged, which can effectively improve the pesticide deposition rate and the adsorption rate on the front and back of the plants, playing a role in improving the pesticide utilization rate and the use effect; since the aerial electrostatic spraying device 100 adopts the induction charging method, the induction part 2 does not directly contact the liquid. The small enough distance between the induction part 2 and the spray disc 12 improves the charging effect of the droplets, and the outer surface of the induction part 2 is wrapped with an insulating material to avoid the discharge between the induction part 2 and the nozzle 1, greatly improving the electrostatic spraying effect. At the same time, the fan device blows air towards the nozzle 1, so that the droplets ejected from the nozzle 1 move away from the induction part 2. This can not only further reduce the distance between the induction part 2 and the nozzle 1, but also make the droplets move towards the crop, improving the targeted spraying effect.

[0051] During use, the charging effect of the aerial electrostatic spraying device 100 can also be changed by adjusting the output voltage of the electrostatic generator 3 and / or adjusting the rotation speed of the nozzle 1. Within a certain range, the greater the voltage of the electrostatic generator 3, the better the charging effect. The faster the rotation speed of the spray disc 12, the smaller the particle size of the ejected droplets. Under the same voltage, the charging effect is better.

[0052] This embodiment also provides an aerial electrostatic spraying system, as Figure 6 and Figure 7 shown, which includes aerial electrostatic spraying devices 100 arranged in pairs on the frame 200, and the electrode polarities of the induction parts 2 of the two aerial electrostatic spraying devices 100 are opposite. Specifically, the aerial electrostatic spraying system includes a first aerial electrostatic spraying device 101 and a second aerial electrostatic spraying device 102 arranged in pairs on the frame 200, wherein the electrode polarities of the induction parts 2 of the first aerial electrostatic spraying device 101 and the second aerial electrostatic spraying device 102 are opposite. Exemplarily, as Figure 6 shown, the induction part 2 of the first aerial electrostatic spraying device 101 is connected to the positive electrode, while the induction part 2 of the second aerial electrostatic spraying device 102 is connected to the negative electrode.

[0053] Further, the ground ends of the two aviation electrostatic spraying devices 100 are respectively connected to the frame 200, or respectively connected to the ground end of the power supply of the aviation electrostatic spraying system, so as to avoid the charge accumulation on the aviation electrostatic spraying device and damage to the entire system.

[0054] In one embodiment, the two aviation electrostatic spraying devices 100 are respectively connected to their respective power supplies. Referring to Figure 6 as shown, the electrostatic generators 3 of the first aviation electrostatic spraying device 101 and the second aviation electrostatic spraying device 102 are respectively connected to the other electrode of the induction part 2 through the connecting member 300 and then connected to the frame 200. The positive electrode of the electrostatic generator 3 of the first aviation electrostatic spraying device 101 is connected to its corresponding induction part 2, and its negative electrode is connected to the frame 200. Since the frame 200 is connected to the nozzle 1 through the connecting member 300, it is equivalent to the negative electrode being connected to the nozzle 1, and a strong induction electric field can be formed between the induction part 2 and the nozzle plate 12 of the nozzle 1. When the droplets are ejected from the nozzle plate 12, they pass through the induction electric field region between the induction part 2 and the nozzle plate 12 and are charged with negative charges opposite to those of the induction part 2. For the second aviation electrostatic spraying device 102, the negative electrode of its electrostatic generator 3 is connected to its corresponding induction part 2, and its positive electrode is connected to the frame 200. Since the frame 200 is connected to the nozzle 1 through the connecting member 300, it is equivalent to the positive electrode being connected to the nozzle 1 of the second aviation electrostatic spraying device 102, and a strong induction electric field is formed between the induction part 2 and the nozzle plate 12 of the nozzle 1. When the droplets are ejected from the nozzle plate 12, they pass through the induction electric field region between the induction part 2 and the nozzle plate 12 and are charged with positive charges opposite to those of the induction part 2. That is, the induction parts 2 of the first aviation electrostatic spraying device 101 and the second aviation electrostatic spraying device 102 are respectively connected to the electrodes with opposite polarities of their respective electrostatic generators 3, and the other electrodes of the electrostatic generators 3 of the first aviation electrostatic spraying device 101 and the second aviation electrostatic spraying device 102 also have opposite polarities and are simultaneously connected to the frame 200. Since the positive electrode and the negative electrode are simultaneously connected to the frame 200, a loop can be formed to avoid charge accumulation, thereby avoiding the charge accumulation on the frame 200 and damaging the frame 200 and the equipment on the frame 200.

[0055] In another embodiment, the two aviation electrostatic spraying devices 100 share a power supply, such as Figure 7As shown, at this time, the polarities of the electrode output terminals of the electrostatic generators 3 of the two aviation electrostatic spraying devices 100 are opposite, and are respectively connected to the induction parts 2 of the two aviation electrostatic spraying devices 100. The other electrode of the electrostatic generator 3 corresponding to the connection of the induction part 2 is directly connected to the ground terminal of the power supply, which can make the overall structure simpler and more reasonable, reduce wiring, and facilitate installation and disassembly. The electrostatic generators of the first aviation electrostatic spraying device 101 and the second aviation electrostatic spraying device 102 are powered by the same power supply, and the negative pole of this power supply is the ground terminal of the entire aviation electrostatic spraying system. By means of internal circuit connection, the negative pole of the electrostatic generator 3 of the first aviation electrostatic spraying device 101 and the positive pole of the electrostatic generator 3 of the second aviation electrostatic spraying device 102 are connected to the negative pole of the power supply, which can reduce the external wire connection of the electrostatic generator 3 and simplify the wiring. The positive pole of the electrostatic generator 3 of the first aviation electrostatic spraying device 101 is connected to its corresponding induction part 2, and the negative pole of the electrostatic generator 3 of the second aviation electrostatic spraying device 102 is connected to its corresponding induction part 2, which is convenient for disassembly and assembly.

[0056] By connecting the induction parts 2 of the first aviation electrostatic spraying device 101 and the second aviation electrostatic spraying device 102 to electrodes with opposite polarities, and connecting the other electrodes of the two electrostatic generators 3 to the ground terminal, excessive charges are prevented from accumulating on the frame 200, which affects the charging effect and even causes harm to the frame 200. Even when grounding is not possible during aviation flight, excessive charges can be released without causing damage to the frame 200 and equipment.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aviation electrostatic spraying device, characterized in that, Comprising: A nozzle, the nozzle including a motor and a spray disc disposed on one side of the motor; An induction part, the distance between the induction part and the spray disc in the axial direction of the spray disc is less than a first preset distance to reduce the distance between the induction part and the spray disc; the induction part is disposed on the side of the spray disc away from the crop for spraying operation; the spray disc is a centrifugal spray disc; Wherein, an insulating layer is coated on the outer surface of the induction part to prevent the droplets sprayed from the spray disc from depositing on the induction part and causing electric leakage or conduction; An electrostatic generator, one electrode of which is connected to the induction part, and the other electrode is connected to the ground terminal of the aviation electrostatic spraying device, so as to form an induction electric field between the induction part and the spray disc to make the spray passing through the induction electric field induced with charges opposite to those of the induction part; A fan device, disposed on the side of the motor away from the spray disc, configured to generate a wind field towards the spray disc direction, so that the spray ejected from the spray disc is away from the induction part; The induction part is fixed to the outer shell of the motor through a bracket, wherein the bracket is made of an insulating material, and the bracket is detachably connected to the induction part; The fixing position between the bracket and the motor is adjusted along the axial direction of the motor; The bracket includes a fixing part adapted to the motor and an extending part connected to the induction part, the fixing part is sleeved on the motor and fastened or loosened by a fastener so as to be fixed or slide along the axial direction of the motor.

2. The aviation electrostatic spraying device according to claim 1, characterized in that, The induction part is coaxially arranged with the spray disc, and the distance between the inner side edge of the induction part and the outer side edge of the spray disc in the radial direction of the spray disc is less than a second preset distance.

3. The aviation electrostatic spraying device according to claim 1, characterized in that, The bracket is disposed on the side of the spray disc close to the fan device and is integrally formed with the outer shell of the motor.

4. The aviation electrostatic spraying device according to claim 3, characterized in that, The water inlet of the spray disc is cooperatively arranged with the bracket inside the induction part.

5. The aviation electrostatic spraying device according to claim 1, characterized in that, The fan device is a propeller disposed on the side of the motor away from the spray disc.

6. The aviation electrostatic spraying device according to claim 1, characterized in that, The insulating layer is composed of at least one layer of cross-linked polyethylene or silicone rubber, and epoxy resin is coated on the surface, and the thickness of the insulating layer is 1-3 millimeters.

7. An aviation electrostatic spraying system, characterized in that, Including the aviation electrostatic spraying device according to any one of claims 1-6 disposed in pairs on the frame, and the electrode polarities of the induction parts of the two aviation electrostatic spraying devices are opposite.

8. The aviation electrostatic spraying system according to claim 7, characterized in that The ground terminals of the two aviation electrostatic spraying devices are respectively connected to the frame, or respectively connected to the ground terminal of the power supply of the aviation electrostatic spraying system.

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