Electrostatic paint spraying device based on six-rotor unmanned aerial vehicle

Abstract

The invention relates to the technical field of unmanned aerial vehicles, in particular to an electrostatic paint spraying device based on a six-rotor unmanned aerial vehicle, the electrostatic paint spraying device comprises a machine body, a bottom shell and a nozzle body, and further comprises a first connecting pipe arranged on one side of the bottom shell in a penetrating mode, and the inner wall of the first connecting pipe is slidably connected with a second connecting pipe; a first connecting pipe, a second connecting pipe and a third connecting pipe are pushed to extend by utilizing pressure given by an electrostatic spraying pump to paint, so that a nozzle body is far away from the unmanned aerial vehicle, interference caused by rotor wing airflow is further reduced by combining the shielding effect of a cover body, and meanwhile, in the landing or large-range moving process, the unmanned aerial vehicle can be effectively protected by utilizing opening of the pump body. Air flows through the interior of the barrel, the third connecting pipe, the second connecting pipe and the first connecting pipe and pushes the third connecting pipe, the second connecting pipe and the first connecting pipe to contract, the total length of the three connecting pipes is shortened, the three connecting pipes are not prone to being broken in the falling or large-range transferring process, and complex transmission facilities are not needed to drive the three connecting pipes to stretch out and draw back.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and particularly to an electrostatic painting device based on a six-rotor unmanned aerial vehicle. Background Technique

[0002] The electrostatic spraying of unmanned aerial vehicles plays a significant role in the maintenance of anti-rust paint for high-altitude pipelines in factory areas. Combining the flexibility of unmanned aerial vehicles and the high efficiency of electrostatic spraying, it can quickly cover high-altitude pipelines, improving the operation efficiency. The electrostatic spraying technology enables the paint mist to be evenly adsorbed on the surface of the pipeline, increasing the utilization rate of the paint, reducing waste, and at the same time reducing the scattering of the paint mist and improving the operation environment. In addition, the operation of unmanned aerial vehicles does not require personnel to climb, reducing the risk of high-altitude operations and ensuring construction safety. This technology is applicable to the anti-corrosion of large industrial equipment, especially suitable for the maintenance of pipelines in high-altitude and complex environments, helping enterprises achieve safe, efficient, and environmentally friendly spraying operations.

[0003] For the electrostatic spraying technology of unmanned aerial vehicles, usually, the unmanned aerial vehicle is equipped with a nozzle and a painting pipeline connected to the nozzle and flown into the sky, and on the ground, relatively long hoses, an electrostatic spraying pump, a paint tank and other equipment are connected. The hose is connected to the painting pipeline; during use, the airflow generated by the rotors of the unmanned aerial vehicle is likely to disrupt the spraying direction of the paint, causing interference. Therefore, it is necessary to design a relatively long painting pipeline to keep the nozzle away from the unmanned aerial vehicle itself and reduce the interference of the rotor airflow. However, for the long pipeline, its center of gravity is far from the unmanned aerial vehicle itself, and during the landing or large-scale movement of the unmanned aerial vehicle, the long pipeline is likely to shake and break. Summary of the Invention

[0004] The purpose of the present invention is to provide an electrostatic painting device based on a six-rotor unmanned aerial vehicle to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An electrostatic painting device based on a six-rotor unmanned aerial vehicle, including a fuselage, a bottom shell and a nozzle body, and further including:

[0006] A first connecting pipe penetrating through one side of the bottom shell, the inner wall of the first connecting pipe is slidably connected with a second connecting pipe, and the inner wall of the second connecting pipe is slidably connected with a third connecting pipe;

[0007] A cover body sleeved and fixed on the surface of the third connecting pipe, one end of the third connecting pipe is communicated with a cylinder body, a one-way ventilation mechanism is arranged on the inner and outer surfaces of the cylinder body, the nozzle body is communicated with the cylinder body, a pump body is bolted to the inner wall of the bottom shell, one end of the third connecting pipe located inside the bottom shell is communicated with a connection port, and a first electromagnetic valve and a second electromagnetic valve are respectively communicated at both ends of the connection port. A front camera is also fixed inside the cover body;

[0008] A connecting pipe that communicates with the end of the first solenoid valve. The end of the connecting pipe away from the first solenoid valve communicates with the inlet end of the pump body. A long hose is connected to the end of the second solenoid valve away from the connection port. A connecting mechanism is also provided between the machine body and the cover body. An exhaust buffering mechanism is provided inside and at the bottom of the bottom shell.

[0009] Preferably, the one-way ventilation mechanism includes a sealing cover, a rubber pad, and a rotating column. The rotating column is rotatably connected to the inner wall of the cylinder body. The sealing cover is welded to the rotating column. The rubber pad is bonded to the surface of the sealing cover. The one-way ventilation mechanism further includes a through hole formed through the surface of the cylinder body, and a limiting column is welded inside the cylinder body.

[0010] Preferably, the diameter of the sealing cover is larger than the inner diameter of the through hole, and the diameter of the rubber pad is the same as the diameter of the sealing cover.

[0011] Preferably, the connecting mechanism includes a first pipe fitting, a second pipe fitting, and a third pipe fitting. The first pipe fitting penetrates through the surface of the bottom shell. The second pipe fitting is slidably connected to the inner wall of the first pipe fitting. The third pipe fitting is slidably connected to the inner wall of the second pipe fitting. First sliding grooves are formed on both sides of the surface of the first pipe fitting. First sliding blocks are welded on both sides of the second pipe fitting, and the first sliding blocks are slidably connected to the inner wall of the first sliding groove. Second sliding grooves are formed on both sides of the second pipe fitting. Second sliding blocks are welded on both sides of the third pipe fitting, and the second sliding blocks are slidably connected to the inner wall of the second sliding groove. The third pipe fitting penetrates through the cover body and is fixed to the penetration part.

[0012] Preferably, the exhaust buffering mechanism includes a storage tank, a third solenoid valve, and a delivery pipeline. The storage tank is bolted inside the bottom shell. A connecting pipe is also connected to the outlet end of the pump body. The other end of the connecting pipe communicates with the storage tank. One end of the third solenoid valve communicates with the storage tank. The other end of the third solenoid valve communicates with the delivery pipeline. The other end of the delivery pipeline is located below the bottom shell and is connected to an air outlet cover. A vertical plate is also sleeved on the surface of the delivery pipeline, and the vertical plate is bolted to the bottom of the bottom shell.

[0013] Preferably, a dust-proof net is bolted on the surface of the cylinder body and outside the through hole.

[0014] Preferably, an infrared sensor is also fixed to the top of the first connecting pipe.

[0015] Preferably, a distance sensor is also fixed to the bottom of the bottom shell.

[0016] Preferably, the inner diameter of the middle side of the first connecting pipe is smaller than the inner diameters of both ends.

[0017] Preferably, a first sealing kit is further fixed on the surface of the second connecting pipe, and the first sealing kit is slidably connected to the inner wall of the first connecting pipe. A second sealing kit is further fixed on the surface of the third connecting pipe, and the second sealing kit is slidably connected to the inner wall of the second connecting pipe. One end of the first connecting pipe close to the second connecting pipe is further fixed with a first sealing ring, and the second connecting pipe is slidably connected to the inner wall of the first sealing ring. One end of the second connecting pipe close to the third connecting pipe is further fixed with a second sealing ring, and the third connecting pipe is slidably connected to the inner wall of the second sealing ring.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By using the pressure given to the paint by the electrostatic spraying pump, the present invention promotes the elongation of the first connecting pipe, the second connecting pipe and the third connecting pipe, so that the nozzle body is far away from the UAV itself, and combined with the shielding effect of the cover body, the interference caused by the rotor airflow is reduced. At the same time, during landing or large-range movement, by opening the pump body, air can flow through the inside of the cylinder body, the third connecting pipe, the second connecting pipe and the first connecting pipe, and promote the contraction of the third connecting pipe, the second connecting pipe and the first connecting pipe, so that the total length of the three connecting pipes is shortened, making it not easy to break during landing or large-range transfer, and there is no need for complex transmission facilities to drive the telescopic movement of the three connecting pipes.

[0020] 2. By opening the pump body, the present invention can not only drive the contraction of the three connecting pipes, but also inject air into the storage tank, so that the pressurized gas is temporarily stored in the storage tank. During landing, by opening the third solenoid valve, the gas is released downward through the delivery pipeline and the air outlet hood, playing an auxiliary buffering role and further reducing the damage during landing.

[0021] 3. Through the setting of the front camera, the present invention facilitates the operator to see the painting position clearly and avoid the shielding caused by the cover body. At the same time, in combination with the use of the first pipe fitting, the second pipe fitting and the third pipe fitting, the connection line of the front camera can be connected to the inside of the UAV itself, avoiding the situation where the camera connection line is exposed outside. Moreover, the first pipe fitting, the second pipe fitting and the third pipe fitting can also extend or contract synchronously with the elongation or shortening of the third connecting pipe and the second connecting pipe, so as to adapt to the moving cover body. The three pipe fittings can bear the downward gravity of the three connecting pipes, thus playing an additional strengthening role.

[0022] 4. Through the design of the through hole, when the pump body is opened, external air can directly enter the cylinder body bypassing the nozzle body, making it easier for air to enter. At the same time, during the spraying process, the pressure of the paint can push the sealing cover to block the through hole, preventing the paint from discharging from the through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1Schematic diagram of the structure after contraction of the second connecting pipe and the third connecting pipe in the present invention;

[0024] Figure 2 Schematic three-dimensional structure diagram of the present invention;

[0025] Figure 3 Schematic cross-sectional structure diagram of the bottom shell and the cover body in the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged structure diagram at position A;

[0027] Figure 5 Schematic structure diagram of the connecting mechanism in the present invention;

[0028] Figure 6 Cross-sectional view of the first connecting pipe in the present invention;

[0029] Figure 7 Cross-sectional view of the second connecting pipe in the present invention;

[0030] Figure 8 Cross-sectional view of the third connecting pipe in the present invention;

[0031] Figure 9 Cross-sectional view of the cylinder in the present invention;

[0032] Figure 10 Schematic structure diagram of the exhaust buffering mechanism in the present invention;

[0033] Figure 11 Schematic structure diagram of the conveying pipeline in the present invention.

[0034] In the figure: 1, body; 2, bottom shell; 3, first connecting pipe; 4, second connecting pipe; 5, third connecting pipe; 6, first sealing kit; 7, second sealing kit; 8, first sealing ring; 9, second sealing ring; 10, cylinder; 11, cover body; 12, nozzle body; 13, front camera; 14, connecting mechanism; 141, first pipe fitting; 142, second pipe fitting; 143, third pipe fitting; 144, first chute; 145, first slider; 146, second chute; 147, second slider; 15, one-way ventilation mechanism; 151, sealing cover; 152, rubber pad; 153, rotating column; 154, through hole; 155, dust screen; 156, limiting column; 16, infrared sensor; 17, connection port; 18, communicating pipe; 19, first solenoid valve; 20, connecting pipe; 21, second solenoid valve; 22, long hose; 23, pump body; 24, distance measuring sensor; 25, exhaust buffering mechanism; 251, storage tank; 252, third solenoid valve; 253, conveying pipeline; 254, vertical plate; 255, air outlet hood. Detailed implementation manners

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figures 1-11 , an electrostatic painting device based on a six-rotor unmanned aerial vehicle, comprising a body 1, a bottom shell 2 and a nozzle body 12. The body 1 is a six-rotor unmanned aerial vehicle, the bottom shell 2 is bolted to the bottom of the body 1, a first connecting pipe 3 is penetrated and arranged on one side of the bottom shell 2, a second connecting pipe 4 is slidably connected to the inner wall of the first connecting pipe 3, a third connecting pipe 5 is slidably connected to the inner wall of the second connecting pipe 4, a first sealing kit 6 is further fixed on the surface of the second connecting pipe 4, and the first sealing kit 6 is slidably connected to the inner wall of the first connecting pipe 3 for increasing the sealing performance between the second connecting pipe 4 and the inner wall of the first connecting pipe 3. A second sealing kit 7 is further fixed on the surface of the third connecting pipe 5, and the second sealing kit 7 is slidably connected to the inner wall of the second connecting pipe 4 for increasing the sealing performance between the third connecting pipe 5 and the inner wall of the second connecting pipe 4. One end of the first connecting pipe 3 close to the second connecting pipe 4 is further fixed with a first sealing ring 8. By opening a threaded hole at the head end of the first connecting pipe 3 and passing a screw through the first sealing ring 8, the fixing of the first sealing ring 8 can be realized, and the second connecting pipe 4 is slidably connected to the inner wall of the first sealing ring 8. The second connecting pipe 4 can slide along the inner wall of the first sealing ring 8 to increase the sealing performance at the inlet and outlet of the first connecting pipe 3. One end of the second connecting pipe 4 close to the third connecting pipe 5 is further fixed with a second sealing ring 9. The second sealing ring 9 and the end of the second connecting pipe 4 are fixed to each other by screws. The third connecting pipe 5 is slidably connected to the inner wall of the second sealing ring 9. The third connecting pipe 5 can slide along the inner wall of the second sealing ring 9 to increase the sealing performance at the inlet and outlet of the second connecting pipe 4. A cover body 11 is sleeved and fixed on the surface of the third connecting pipe 5. One end of the third connecting pipe 5 is communicated with a cylinder body 10. A one-way ventilation mechanism 15 is arranged on the inner and outer surfaces of the cylinder body 10. The nozzle body 12 is communicated with the cylinder body 10. A pump body 23 is bolted to the inner wall of the bottom shell 2. One end of the third connecting pipe 5 located inside the bottom shell 2 is communicated with a connection port 17. The connection port 17 is a three-way interface. The two ends of the connection port 17 are respectively communicated with a first electromagnetic valve 19 and a second electromagnetic valve 21. A front camera 13 is further fixed inside the cover body 11. One end of the first electromagnetic valve 19 is communicated with a communication pipe 18. The end of the communication pipe 18 far from the first electromagnetic valve 19 is communicated with the inlet end of the pump body 23. One end of the second electromagnetic valve 21 far from the connection port 17 is communicated with a long hose 22. A connection mechanism 14 is further arranged between the body 1 and the cover body 11. An exhaust buffering mechanism 25 is arranged inside and at the bottom of the bottom shell 2.

[0037] The one-way ventilation mechanism 15 includes a sealing cover 151, a rubber pad 152 and a rotating column 153. The rotating column 153 is rotatably connected to the inner wall of the cylinder body 10. The sealing cover 151 and the rotating column 153 are welded to each other, so that the sealing cover 151 can rotate. The rubber pad 152 is adhered to the surface of the sealing cover 151. The one-way ventilation mechanism 15 further includes a through hole 154 formed through the surface of the cylinder body 10. The diameter of the sealing cover 151 is larger than the inner diameter of the through hole 154, and the diameter of the rubber pad 152 is the same as that of the sealing cover 151. When the sealing cover 151 plugs the through hole 154, it can completely cover the surface of the through hole 154. A limiting column 156 is also welded inside the cylinder body 10.

[0038] The connecting mechanism 14 includes a first pipe fitting 141, a second pipe fitting 142 and a third pipe fitting 143. The first pipe fitting 141 is disposed through the surface of the bottom case 2. The second pipe fitting 142 is slidably connected to the inner wall of the first pipe fitting 141. The third pipe fitting 143 is slidably connected to the inner wall of the second pipe fitting 142. First sliding grooves 144 are formed on both sides of the surface of the first pipe fitting 141. First sliding blocks 145 are welded on both sides of the second pipe fitting 142, and the first sliding blocks 145 are slidably connected to the inner walls of the first sliding grooves 144. Second sliding grooves 146 are formed on both sides of the second pipe fitting 142. Second sliding blocks 147 are welded on both sides of the third pipe fitting 143, and the second sliding blocks 147 are slidably connected to the inner walls of the second sliding grooves 146. The third pipe fitting 143 passes through the cover body 11 and is fixed to the penetrating portion thereof.

[0039] When working, first externally connect the long hose 22 to an electrostatic spraying pump (the electrostatic spraying pump is placed on a small trolley, and there is also a paint can on the small trolley). Before that, the second pipe fitting 142 and the third pipe fitting 143 are retracted into the first pipe fitting 141. Then, the body 1 rises and aligns with the position to be sprayed, such as spraying anti-rust paint on the high pipes in the factory. Turn on the electrostatic spraying pump on the ground, and turn on the second solenoid valve 21 and turn off the first solenoid valve 19. It transports the paint through the long hose 22 into the interior of the first connecting pipe 3 (the long hose 22 is actually quite long, and only a part is shown in the figure). Then, the paint enters the interior of the third connecting pipe 5 through the second connecting pipe 4. During this process, the pressure of the paint can push the second connecting pipe 4 and the third connecting pipe 5 to move. The inner diameter of the middle side of the first connecting pipe 3 is smaller than that of the two ends, and the middle side is narrow. When the paint passes through the middle side of the third connecting pipe 5, it can exert force on the inner wall of the third connecting pipe 5, making it easier to push the third connecting pipe 5 to move. After that, the third connecting pipe 5 moves along the inner wall of the second connecting pipe 4 and extends, synchronously driving the second sealing kit 7 to move. The second connecting pipe 4 moves along the inner wall of the first connecting pipe 3 and extends, synchronously driving the first sealing kit 6 to move. In this way, the cover body 11 and the nozzle body 12 are moved away from the drone itself. At the same time, the cooperation of the cover body 11 can play a role in blocking the airflow and preventing the airflow of the drone rotor from having a greater impact on the spraying direction of the paint. When the paint passes through the third connecting pipe 5 and then passes through the cylinder body 10, under the action of the pressure, the sealing cover 151 and the rubber pad 152 block the through hole 154 (the sealing cover 151 is in a drooping state and contacts the limit post 156 when not under force. The pressure of the paint will push the sealing cover 151 to rotate towards the through hole 154. Due to the role of the limit post 156, the sealing cover 151 will not rotate towards the side away from the through hole 154). The sealing cover 151 covers the through hole 154 to prevent the paint from spraying out from the through hole 154. After that, the paint is sprayed out through the nozzle body 12.

[0040] A plurality of cameras are usually arranged on the surface of the drone for observation, and the cameras are transmitted to the handle in the hands of the operator below through wireless signals (the front camera 13 arranged in the device is not the camera of the drone itself). Since the cover 11 is arranged at the front end of the third connecting pipe 5, although the interference of the airflow of the drone rotor on the spraying of paint is reduced, the cover 11 blocks the sight of the camera of the drone itself. Therefore, the front camera 13 is arranged inside the cover 11. The front camera 13 is connected to the drone by wires and signal lines. If it is exposed to the outside, it is easy to be affected by the airflow and fly around, and then be torn off. In order to facilitate the connection of the connection line of the front camera 13 to the inside of the body 1 (the line connecting the front camera 13 cannot pass through the first connecting pipe 3, the second connecting pipe 4 and the third connecting pipe 5, because there is paint passing through the inside of the connecting pipe, the first connecting pipe 3, the second connecting pipe 4 and the third connecting pipe 5 can be retracted, and the outside cannot be effectively fixed), the first pipe 141, the second pipe 142 and the third pipe 143 can accommodate the passage of the line to supply power to the front camera 13 and enable the front camera 13 to be connected to the inside of the body 1. The camera 13 captures the spraying operation image and transmits it to the drone itself and to the ground operating handle. In addition, when the third connecting tube 5 is extended and pushes the cover body 11 to move, the cover body 11 can drive the third pipe 143 to move together, and the third pipe 143 drives the second slider 147 to move. When the second slider 147 contacts the end of the inner wall of the second slide groove 146, it can pull the second pipe 142 to move. The second pipe 142 drives the first slider 145 to slide along the inner wall of the first slide groove 144. When the third connecting tube 5 is extended to the maximum After reaching the maximum limit, the third tube 143 and the second tube 142 stop moving, so that the connecting mechanism 14 accommodating the line of the front camera 13 can also be extended and retracted to adapt to the retractable connecting tube, and the first tube 141, the second tube 142 and the third tube 143 can also bear the downward force exerted on the first connecting tube 3, the second connecting tube 4, the third connecting tube 5, the cylinder 10, the cover body 11 and the nozzle body 12, thereby playing an additional reinforcement role and increasing the firmness of the first connecting tube 3, the second connecting tube 4 and the third connecting tube 5 to each other.

[0041] The exhaust buffering mechanism 25 includes a storage tank 251, a third solenoid valve 252, and a delivery pipeline 253. The storage tank 251 is bolted inside the bottom shell 2. The outlet end of the pump body 23 is also communicated with a connecting pipe 20. The other end of the connecting pipe 20 is communicated with the storage tank 251. One end of the third solenoid valve 252 is communicated with the storage tank 251, and the other end of the third solenoid valve 252 is communicated with the delivery pipeline 253. The delivery pipeline 253 is composed of multiple sections of pipes and a tee joint. The other end of the delivery pipeline 253 is located below the bottom shell 2 and is communicated with an air outlet hood 255. The number of air outlet hoods 255 is four groups and they are respectively located at the four corners of the bottom of the bottom shell 2. A vertical plate 254 is also sleeved on the surface of the delivery pipeline 253, and the vertical plate 254 is bolted to the bottom of the bottom shell 2 for positioning the delivery pipeline 253.

[0042] After the UAV spraying work is completed, if it needs to land or move over a large range, first turn off the electrostatic spraying pump, then turn off the second solenoid valve 21, and turn on the first solenoid valve 19 and the pump body 23. The pump body 23 is an air pump, which makes the external air push open the sealing cover 151 through the through hole 154 (the internal gap of the nozzle body 12 is not easy for air to enter, and it is also easy for air to carry dust from the nozzle and cause blockage, so the through hole 154 is designed to allow air to enter easily from another place). The sealing cover 151 contacts the limit post 156. A dust-proof net 155 is also bolted on the surface of the cylinder body 10 and outside the through hole 154. The dust-proof net 155 is designed in a hemispherical shape. The dust-proof net 155 prevents external dust from entering. Then the air passes through the third connecting pipe 5, the second connecting pipe 4, and the first connecting pipe 3. When the air passes through, it can push the third connecting pipe 5 and the second connecting pipe 4 to contract inward, thereby driving the cylinder body 10 and the cover body 11 to approach the airframe 1. Finally, as Figure 1 shown, the total length of the first connecting pipe 3, the second connecting pipe 4, and the third connecting pipe 5 is shortened, and their center of gravity approaches the UAV itself, making it not easy to break during the landing process. Moreover, the cover body 11 can also push the third pipe fitting 143, the second pipe fitting 142, and the first pipe fitting 141 to be stored. At the same time, the camera connection wires inside the third pipe fitting 143, the second pipe fitting 142, and the first pipe fitting 141 can also be bent (after the cover body 11 extends, the connection wires can also be stretched again. The connection wires are selected as anti-twist wires); then the flowing air passes through the connection port 17, the first solenoid valve 19, the communication pipe 18, the pump body 23, and the connecting pipe 20 and enters the inside of the storage tank 251, increasing the gas pressure inside the storage tank 251; an infrared sensor 16 is also fixed on the top of the first connecting pipe 3. After the infrared sensor 16 detects that the cover body 11 is approaching, it means that the first connecting pipe 3, the second connecting pipe 4, and the third connecting pipe 5 have completed contraction. At this time, the staff can operate the UAV to land or move over a large range.

[0043] A distance measuring sensor 24 is also fixed to the bottom of the bottom case 2, which is used to measure the distance from the ground during the landing process. The distance measuring sensor 24 transmits the measured value to the processing chip built into the drone. When the bottom case 2 of the drone approaches the ground during landing (such as 10 - 15 cm), the control of the drone opens the second solenoid valve 21, and controls the pump body 23 and the first solenoid valve 19 to close. The gas inside the storage tank 251 passes through the third solenoid valve 252 and the delivery pipeline 253, and then discharges the gas downward from the air outlet cover 255 to implement auxiliary buffering (the drone itself also has its own buffering facilities), further reducing the damage to the painting pipes such as the first connecting pipe 3, the second connecting pipe 4, and the third connecting pipe 5 during the landing process.

[0044] In the above process, the device can not only use the pressure given by the electrostatic spraying pump to the paint to push the first connecting pipe 3, the second connecting pipe 4, and the third connecting pipe 5 to extend, so that the nozzle body 12 is far away from the drone itself. Combined with the cooperation of the cover body 11, it reduces the interference caused by the rotor airflow. At the same time, during the landing or large - range movement process, it can use the opening of the pump body 23 to allow air to flow inside through the cylinder body 10, the third connecting pipe 5, the second connecting pipe 4, and the first connecting pipe 3, and push them to contract, shortening the total length of the three connecting pipes, making them not easy to break during the landing or large - range transfer process. There is no need for complex transmission facilities to drive the pipeline to expand and contract. Moreover, the pump body 23 inhales air to become pressurized gas (greater than the external air pressure), which can be temporarily stored inside the storage tank 251 and can be released during the landing process to play an auxiliary buffering role and further reduce the damage.

[0045] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrostatic spraying device based on a six-rotor unmanned aerial vehicle, comprising a fuselage (1), a bottom shell (2) and a nozzle body (12), characterized in that, It further includes: A first connecting pipe (3) penetrating and arranged on one side of the bottom shell (2), a second connecting pipe (4) is slidably connected to the inner wall of the first connecting pipe (3), and a third connecting pipe (5) is slidably connected to the inner wall of the second connecting pipe (4); A cover body (11) sleeved and fixed on the surface of the third connecting pipe (5), one end of the third connecting pipe (5) is communicated with a cylinder body (10), a one-way ventilation mechanism (15) is arranged on the inner and outer surfaces of the cylinder body (10), the nozzle body (12) is communicated with the cylinder body (10), a pump body (23) is bolted to the inner wall of the bottom shell (2), one end of the third connecting pipe (5) located inside the bottom shell (2) is communicated with a connection port (17), a first solenoid valve (19) and a second solenoid valve (21) are respectively communicated at both ends of the connection port (17), and a front camera (13) is further fixed inside the cover body (11); A connecting pipe (18) communicated with the end of the first solenoid valve (19), the end of the connecting pipe (18) away from the first solenoid valve (19) is communicated with the inlet end of the pump body (23), a long hose (22) is communicated at the end of the second solenoid valve (21) away from the connection port (17), a connecting mechanism (14) is further arranged between the machine body (1) and the cover body (11), and an exhaust buffering mechanism (25) is arranged inside and at the bottom of the bottom shell (2).

2. The electrostatic spraying device based on a six-rotor unmanned aerial vehicle according to claim 1, wherein: The one-way ventilation mechanism (15) includes a sealing cover (151), a rubber pad (152) and a rotating column (153), the rotating column (153) is rotatably connected to the inner wall of the cylinder body (10), the sealing cover (151) is welded to the rotating column (153), the rubber pad (152) is adhered to the surface of the sealing cover (151), the one-way ventilation mechanism (15) further includes a through hole (154) penetrating and opened on the surface of the cylinder body (10), and a limiting column (156) is further welded inside the cylinder body (10).

3. The electrostatic spraying device based on a six-rotor unmanned aerial vehicle according to claim 2, characterized in that: The diameter of the sealing cover (151) is larger than the inner diameter of the through hole (154), and the diameter of the rubber pad (152) is the same as the diameter of the sealing cover (151).

4. The electrostatic painting device based on a six-rotor unmanned aerial vehicle according to claim 1, characterized in that: The connecting mechanism (14) includes a first pipe fitting (141), a second pipe fitting (142) and a third pipe fitting (143). The first pipe fitting (141) is disposed through the surface of the bottom case (2). The second pipe fitting (142) is slidably connected to the inner wall of the first pipe fitting (141). The third pipe fitting (143) is slidably connected to the inner wall of the second pipe fitting (142). First sliding grooves (144) are formed on both sides of the surface of the first pipe fitting (141). First sliding blocks (145) are welded to both sides of the second pipe fitting (142), and the first sliding blocks (145) are slidably connected to the inner walls of the first sliding grooves (144). Second sliding grooves (146) are formed on both sides of the second pipe fitting (142). Second sliding blocks (147) are welded to both sides of the third pipe fitting (143), and the second sliding blocks (147) are slidably connected to the inner walls of the second sliding grooves (146). The third pipe fitting (143) passes through the cover body (11) and is fixed to the penetrating portion thereof.

5. The electrostatic painting device based on a six-rotor unmanned aerial vehicle according to claim 1, characterized in that: The exhaust buffering mechanism (25) includes a storage tank (251), a third solenoid valve (252) and a delivery pipeline (253). The storage tank (251) is bolted to the inside of the bottom case (2). A connecting pipe (20) is further connected in communication with the outlet end of the pump body (23). The other end of the connecting pipe (20) is communicated with the storage tank (251). One end of the third solenoid valve (252) is communicated with the storage tank (251). The other end of the third solenoid valve (252) is communicated with the delivery pipeline (253). The other end of the delivery pipeline (253) is located below the bottom case (2) and is connected in communication with an air outlet hood (255). A vertical plate (254) is further sleeved on the surface of the delivery pipeline (253), and the vertical plate (254) is bolted to the bottom of the bottom case (2).

6. The electrostatic spraying device based on a six-rotor unmanned aerial vehicle according to claim 2, characterized in that: A dust blocking net (155) is further bolted to the surface of the cylinder body (10) and outside the through hole (154).

7. The electrostatic painting device based on a six-rotor unmanned aerial vehicle according to claim 1, characterized in that: An infrared sensor (16) is further fixed to the top of the first connecting pipe (3).

8. The electrostatic spraying device based on a six-rotor unmanned aerial vehicle according to claim 1, characterized in that: A distance measuring sensor (24) is further fixed to the bottom of the bottom case (2).

9. The electrostatic painting device based on a six-rotor unmanned aerial vehicle according to claim 1, characterized in that: The inner diameter of the middle side of the first connecting pipe (3) is smaller than the inner diameters of both ends.

10. The electrostatic spraying device based on a six-rotor unmanned aerial vehicle according to claim 1, wherein: A first sealing kit (6) is further fixed to the surface of the second connecting pipe (4), and the first sealing kit (6) is slidably connected to the inner wall of the first connecting pipe (3). A second sealing kit (7) is further fixed to the surface of the third connecting pipe (5), and the second sealing kit (7) is slidably connected to the inner wall of the second connecting pipe (4). A first sealing ring (8) is further fixed to one end of the first connecting pipe (3) close to the second connecting pipe (4), and the second connecting pipe (4) is slidably connected to the inner wall of the first sealing ring (8). A second sealing ring (9) is further fixed to one end of the second connecting pipe (4) close to the third connecting pipe (5), and the third connecting pipe (5) is slidably connected to the inner wall of the second sealing ring (9).

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