A fuel-powered drone for pesticide spraying

Abstract

The present application relates to a fuel-driven drone for pesticide spraying, which belongs to the field of agricultural plant protection and drone pesticide spraying, and includes a drone body, an engine is arranged on the drone body, an exhaust pipe is arranged on the engine, and a plurality of pesticide boxes are arranged at the bottom of the drone body, and the exhaust pipe is connected to an exhaust gas purification device; the exhaust gas purification device includes an air collecting box fixedly connected to the drone body, a purification cylinder is arranged on the drone body, an air intake pipe is fixedly connected to one side of the purification cylinder, and ammonium bicarbonate solution and catalyst are contained in the purification cylinder, an air storage box is arranged on the drone body, an air guide pipe is arranged on the top of the purification cylinder, and the end of the air guide pipe away from the purification cylinder extends into the air storage box, and the bottom of the air storage box is fixedly connected to an air outlet pipe; a spray box is fixedly connected to the drone body, and an atomizing nozzle is connected to the spray box. The present application has the effect of reducing the exhaust pollution of the drone and applying the exhaust gas to pesticide spraying.

Description

Technical Field

[0001] The present application relates to the field of agricultural plant protection and drone pesticide spraying, and in particular to a fuel-driven drone for pesticide spraying. Background Art

[0002] In the field of agricultural plant protection, advanced plant protection technology and equipment play an important role in the prevention and control of crop diseases, insect pests and weeds. Due to the constraints of factors such as topography, crop planting environment and late crop growth, the old ground plant protection spray machinery cannot be well entered to complete the spraying operation, or the operation efficiency is low. Therefore, in recent years, domestic aviation plant protection technology, especially drone plant protection technology, has gradually gained attention and developed rapidly. The plant protection process has high requirements for the load capacity, endurance time and stability of drones. In these aspects, fuel-powered inorganic drones have obvious advantages over electric drones.

[0003] However, the main pollutants in the exhaust gas emitted by gasoline engines include carbon monoxide, nitrogen oxides, hydrocarbons, etc. Among them, nitrogen oxides are emitted into the air, which are harmful gases that are focused on in the exhaust gas detection of motor vehicles.

[0004] Therefore, discharging these exhaust gases directly into the air will aggravate environmental pollution. If the pesticide spraying device can be integrated into the exhaust pipe of the engine to reduce the pollution of the engine's exhaust emissions, it becomes an urgent problem to be solved. Summary of the invention

[0005] In order to reduce the exhaust pollution of drones and apply the exhaust gas to pesticide spraying, the present application provides a fuel-driven drone for pesticide spraying.

[0006] The present application provides a fuel-driven drone for pesticide spraying, which adopts the following technical solution.

[0007] A fuel-driven drone for pesticide spraying comprises a drone body, an engine is arranged on the drone body, an exhaust pipe is arranged on the engine, a plurality of pesticide boxes are arranged at the bottom of the drone body, a discharge pipe is arranged on the pesticide box, and an exhaust gas purification device is connected to the exhaust pipe; the exhaust gas purification device comprises an air collecting box fixedly connected to the drone body, the exhaust pipe is communicated with the inside of the air collecting box, a purification cylinder is arranged on the drone body, an air intake pipe is fixedly connected to one side of the purification cylinder, the air intake pipe is communicated with the inside of the air collecting box, an ammonium bicarbonate solution and a catalyst are contained in the purification cylinder, an air storage box is arranged on the drone body, an air guide pipe is arranged on the top of the purification cylinder, an end of the air guide pipe away from the purification cylinder extends into the air storage box, and an air outlet pipe is fixedly connected to the bottom of the air storage box; a spray box is fixedly connected to the drone body, a plurality of atomizing nozzles are connected to the spray box, an end of the air outlet pipe away from the air storage box is communicated with the spray box, and the discharge pipe is communicated with the inside of the spray box.

[0008] By adopting the above technical solution, when the user uses it, the exhaust gas generated by the engine enters the gas collecting box through the exhaust pipe, and the exhaust gas in the gas collecting box enters the purification cylinder. The catalyst converts nitrogen monoxide into nitrogen dioxide. The nitrogen dioxide first reacts with the water in the ammonium bicarbonate solution to generate nitric acid. The nitric acid and ammonium bicarbonate react to generate ammonia, carbon dioxide and water. The reaction equation is: 2NO + O2 = 2NO2, 3NO2+H2O=2HNO3+NO, NH4HCO3 + HNO3 → NH3 + CO2 + H2O, thereby converting nitrogen oxides in the exhaust gas into gases with less air pollution. The purified gas enters the air storage box for storage, and then the gas in the air storage box is guided to the spray box through the outlet pipe. The purified exhaust gas is mixed with the pesticide in the spray box, which not only reacts with the pesticide to reduce the harmful gases in the exhaust gas, but also the pressured gas exported by the air storage box makes the pesticide particles reach a high level of atomization to ensure the penetration effect of pesticide spraying, so as to apply the exhaust gas to pesticide spraying and reduce the pollution of engine exhaust emissions.

[0009] Optionally, a material stopping barrel is fixedly connected to the bottom of the purification barrel, a convex edge is fixedly connected to the top of the material stopping barrel, the convex edge is flipped toward the outside of the material stopping barrel, the convex edge is fixedly connected to the inner wall of the purification barrel, an air inlet cavity is formed between the convex edge, the material stopping barrel and the inner wall of the purification barrel, and the bottom and top of the material stopping barrel are hollow.

[0010] By adopting the above technical solution, when the user uses it, the exhaust gas enters the purification cylinder, passes through the air inlet cavity and enters the ammonium bicarbonate solution at the bottom of the material retaining cylinder. The convex edge allows the exhaust gas to enter the material retaining cylinder from the bottom of the material retaining cylinder, thereby allowing the exhaust gas to fully contact with the catalyst and the ammonium bicarbonate solution.

[0011] Optionally, a plurality of filter screens are fixedly connected to the bottom of the material blocking barrel.

[0012] By adopting the above technical solution, when the user uses it, the exhaust gas is passed into the ammonium hydroxide solution. Because the gas is not easily soluble in water and the pressure in all directions in the water is equal, the gas is squeezed into a spherical shape, thereby forming bubbles. The filter is used to reduce the generation of bubbles in the retaining barrel, so that the exhaust gas can fully react with the ammonium hydroxide solution, the catalyst, etc.

[0013] Optionally, a return spring is fixedly connected to the top of the air storage box, the return spring is vertically arranged, one end of the return spring is fixedly connected to the top of the air storage box, and the bottom of the return spring is fixedly connected to a piston plate, and the diameter of the piston plate is the same as the inner diameter of the air storage box.

[0014] By adopting the above technical solution, when the user uses it, the gas storage box is used to collect gases such as ammonia and carbon dioxide generated in the purification cylinder, and the piston plate is used to adjust the gas in the gas storage box. When the gas in the gas storage box increases, the air pressure pushes the piston plate to squeeze the return spring, which can ensure that the air pressure in the gas storage box is in a saturated state, and the gas discharged through the outlet pipe is pressurized gas; in addition, the exhaust gas discharged by the drone is intermittent, mainly because the working state of the engine of the drone is not continuous during the flight, but is powered in an intermittent manner. This intermittent working mode causes the exhaust gas to be discontinuous. The gas generated in the purification cylinder enters the gas storage box for storage, and the cooperation of the return spring and the piston plate balances the pressure in the gas storage box, and then the gas entering the spray box through the air inlet pipe is more uniform, and then the pesticide sprayed by the atomizing nozzle is more uniform, which is not affected by the intermittent exhaust gas discharge of the drone.

[0015] Optionally, a pressure regulating pipe is fixedly connected to the air storage box, and a pressure regulating valve is fixedly connected to the pressure regulating pipe.

[0016] By adopting the above technical solution, when the user uses it, when the air pressure in the air storage box increases to a saturated state, the pressure regulating valve opens to discharge excess gas to prevent the air pressure in the air storage box from being too high and damaging the air storage box.

[0017] Optionally, an exhaust assembly is connected to the air collecting box; the exhaust assembly includes an exhaust pipe fixedly connected to the air collecting box, the exhaust pipe is connected to the air collecting box, a filter cartridge is connected to the exhaust pipe, a discharge pipe is fixedly connected to the top of the filter cartridge, a baffle is slidably connected inside the air collecting box, and an electromagnetic valve is fixedly connected to the air collecting box, the electromagnetic valve is used to control the sliding of the baffle according to the temperature requirements of the pesticide, and control the exhaust gas to enter the intake pipe or the exhaust pipe.

[0018] By adopting the above technical solution, when the user uses it, when the sprayed pesticide has a high requirement on the temperature of the gas, the solenoid valve controls the baffle to slide to the position of the vent pipe, blocks the vent pipe, and allows the airflow to enter the intake pipe; when the sprayed pesticide cannot adapt to the low temperature, the solenoid valve controls the baffle to slide to the position of the intake pipe, allowing the exhaust gas to enter the vent pipe. The exhaust pipe directly discharges the gas generated by the reaction of the exhaust gas and the ammonium hydroxide solution into the air, preventing harmful gases in the exhaust gas from directly entering the air.

[0019] Optionally, the air vent pipe is connected to an air motor, the bottom of the air motor is connected to an air pump, a boost pipe is provided on the air motor, the air pump extends into the boost pipe, one end of the boost pipe is open to facilitate air entry, and the other end is fixedly connected to the air storage box and extends into the air storage box.

[0020] By adopting the above technical solution, when the user uses it, the pneumatic motor is called a pneumatic motor, which is a device used to convert the pressure energy of compressed air into rotational mechanical energy. The exhaust gas generated by the engine enters the exhaust pipe to drive the pneumatic motor to work. On the one hand, the fan blades of the pneumatic motor rotate to cool the exhaust gas. On the other hand, the pneumatic motor rotates to drive the air pump to work. The operation of the air pump makes the boost pipe in a negative pressure state, that is, it can introduce air into the air storage tank to replenish the pressure in the air storage tank.

[0021] Optionally, the bottoms of the purification cartridge and the filter cartridge are fixedly connected with a return pipe, and one end of the return pipe away from the purification cartridge and the filter cartridge is connected to the spray box.

[0022] By adopting the above technical solution, when the user uses it, the return pipe guides the ammonium hydroxide solution, ammonium nitrate, nitric acid and other solutions in the purification cylinder and the filter cylinder into the spray box, so that the ammonium hydroxide solution, ammonium nitrate, nitric acid and other solutions are sprayed into the soil together with the pesticides. The ammonium hydroxide solution, ammonium nitrate and nitric acid react with the metal elements in the tuluo to form nitrogen fertilizer, thereby achieving the effect of fertilizing the tuluo, not only purifying the exhaust gas, but also making full use of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0024] Figure 2 It is a structural schematic diagram made by this application to highlight the engine;

[0025] Figure 3 This is a structural diagram for highlighting the exhaust gas purification device;

[0026] Figure 4 This is a cross-sectional view made to highlight the exhaust gas purification device;

[0027] Figure 5This is a cross-sectional view to highlight the air pipe, material guide pipe, return pipe and spray box.

[0028] Figure 6 This is a cross-sectional view made to highlight the internal structure of the gas box;

[0029] Figure 7 This is a cross-sectional view made to highlight the exhaust assembly;

[0030] Figure 8 This is a structural diagram designed to highlight the positions of the air pipe, material guide pipe, and return pipe.

[0031] Explanation of reference numerals: 1. UAV body; 11. Engine; 111. Exhaust pipe; 2. Exhaust gas purification device; 21. Air collecting box; 22. Purification cylinder; 221. Inlet pipe; 222. One-way valve; 223. Stopper cylinder; 224. Lug; 225. Filter; 226. Air guide pipe; 23. Storage box; 231. Discharge pipe; 232. Water pump; 24. Storage box; 241. Return spring ; 242, piston plate; 243, pressure regulating pipe; 244, pressure regulating valve; 245, air outlet pipe; 25, exhaust assembly; 251, vent pipe; 252, baffle; 253, solenoid valve; 254, pneumatic motor; 255, air pump; 256, boost pipe; 26, filter cartridge; 261, discharge pipe; 27, return pipe; 3, pesticide box; 31, material guide pipe; 4, atomizing nozzle; 41, spray box. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-8 This application is described in further detail.

[0033] The present application embodiment discloses a fuel-driven drone for pesticide spraying, referring to Figure 1 and Figure 2 , including a drone body 1, an engine 11 is arranged on the drone body 1, an exhaust pipe 111 is arranged on the engine 11, an exhaust gas purification device 2 is connected to the exhaust pipe 111, a pesticide box 3 is arranged at the bottom of the drone body 1, the number of the pesticide boxes 3 is multiple, and an atomizing nozzle 4 is arranged on one side of the drone body 1; the exhaust gas purification device 2 purifies the exhaust gas, and the purified exhaust gas is introduced into the pesticide box 3 to react with the pesticide, so as to purify the exhaust gas again, thereby reducing the waste gas in the exhaust gas from entering the environment to pollute the environment.

[0034] Reference Figure 3 and Figure 4The exhaust gas purification device 2 includes an air collecting box 21 fixedly connected to the drone body 1, and the exhaust pipe 111 is connected to the air collecting box 21. The exhaust gas purification device 2 also includes a purification cylinder 22, one side of which is fixedly connected to an air intake pipe 221, the air intake pipe 221 is fixedly connected to the air collecting box 21 and is connected to the air collecting box 21, the air intake pipe 221 is fixedly connected to the side wall of the purification cylinder 22 near the bottom, and a one-way valve 222 is arranged in the air intake pipe 221, which facilitates the introduction of gas in the air intake pipe 221 into the purification cylinder 22, and prevents the gas in the purification cylinder 22 from entering the air intake pipe 221; the bottom of the purification cylinder 22 is fixedly connected to a material stopper Cylinder 223, the top of the material-blocking cylinder 223 is fixedly connected with a convex edge 224, the convex edge 224 is turned toward the outside of the material-blocking cylinder 223, the convex edge 224 is fixedly connected to the inner wall of the purification cylinder 22, an air inlet cavity is formed between the convex edge 224, the material-blocking cylinder 223 and the inner wall of the purification cylinder 22, the bottom and the top of the material-blocking cylinder 223 are hollow, and the bottoms of the material-blocking cylinder 223 and the purification cylinder 22 are filled with ammonium bicarbonate solution and a catalyst; wherein the catalyst usually uses alumina as a carrier, and platinum, rhodium and palladium are the main catalyst components. The exhaust gas enters the purification cylinder 22, and then enters the ammonium bicarbonate solution at the bottom of the retaining cylinder 223 after passing through the air inlet cavity. The catalyst is used to convert the nitric oxide in the exhaust gas into nitrogen dioxide. The nitrogen dioxide first reacts with the water in the ammonium bicarbonate solution to generate nitric acid. The nitric acid and ammonium bicarbonate react to generate ammonia, carbon dioxide and water. The reaction equation is: 2NO + O2 = 2NO2, 3NO2+H2O=2HNO3+NO, NH4HCO3 + HNO3 → NH3 + CO2 + H2O, thereby converting the nitrogen oxides in the exhaust gas into gases with less air pollution.

[0035] A plurality of filter screens 225 are fixedly connected to the bottom of the material retaining barrel 223. The tail gas is passed into the ammonium hydroxide solution. Since the gas is not easily soluble in water and the pressure in all directions in the water is equal, the gas is squeezed into a spherical shape, thereby forming bubbles. The filter screens 225 are used to reduce the generation of bubbles in the material retaining barrel 223, so that the tail gas can fully react with the ammonium hydroxide solution, the catalyst, etc.

[0036] A storage box 23 is provided on the drone body 1, and the storage box 23 is used to store ammonium bicarbonate solution and catalyst. A discharge pipe 231 is fixedly connected to the storage box 23, and a water pump 232 is fixedly connected to the discharge pipe 231. The discharge pipe 231 extends from one end of the storage box 23 to the top of the purification cylinder 22; under the action of the water pump 232, the discharge pipe 231 introduces the ammonium bicarbonate solution and the catalyst into the purification cylinder 22, maintains the ammonium hydroxide solution in the purification cylinder 22, and ensures that the nitrogen oxides in the exhaust gas can fully react and convert.

[0037] An air storage box 24 is provided on the drone body 1, and an air guide pipe 226 is provided on the top of the purification cylinder 22. The end of the air guide pipe 226 away from the purification cylinder 22 extends into the air storage box 24. A return spring 241 is fixedly connected to the top of the air storage box 24. The return spring 241 is vertically arranged, and one end of the return spring 241 is fixedly connected to the top of the air storage box 24. A piston plate 242 is fixedly connected to the bottom of the return spring 241. The diameter of the piston plate 242 is the same as the inner diameter of the air storage box 24. The air storage box 24 is used to collect ammonia and The piston plate 242 is used to regulate the gas in the gas storage box 24. When the gas in the gas storage box 24 increases, the air pressure pushes the piston plate 242 to squeeze the return spring 241, which can ensure that the air pressure in the gas storage box 24 is in a saturated state; a pressure regulating pipe 243 is fixedly connected to the gas storage box 24, and a pressure regulating valve 244 is fixedly connected to the pressure regulating pipe 243. When the air pressure in the gas storage box 24 increases to a saturated state, the pressure regulating valve 244 opens to discharge excess gas to prevent the air pressure in the gas storage box 24 from being too high and damaging the gas storage box 24.

[0038] Reference Figure 5 A spray box 41 is fixedly connected to the drone body 1, the atomizing nozzle 4 is fixed on the spray box 41, a guide pipe 31 is fixedly connected to the pesticide box 3, a pipe clamp is provided on the pesticide box 3, the pipe clamp is convenient for fixing the guide pipe 31 to the pesticide box 3, one end of the guide pipe 31 away from the pesticide box 3 extends into the spray box 41, and the guide pipe 31 is used to guide the pesticide in the pesticide box 3 into the spray box 41; an air outlet pipe 245 is fixedly connected to the air storage box 24, and one end of the air outlet pipe 245 away from the spray box 41 extends into the spray box 41.

[0039] Reference Figure 6 and Figure 7 , among which, the exhaust gas discharged by the drone is intermittent, mainly because the working state of the engine 11 of the drone is not continuous during flight, but provides power in an intermittent manner. This intermittent working mode leads to the intermittent exhaust gas emission. The gas generated in the purification cylinder 22 enters the gas storage box 24 for storage. The cooperation of the return spring 241 and the piston plate 242 balances the pressure in the gas storage box 24, and then the gas pressure entering the spray box 41 through the air intake pipe 221 is the same, and then the pesticide sprayed by the atomizing nozzle 4 is more uniform and is not affected by the intermittent exhaust gas discharge of the drone.

[0040] Since the exhaust gas has a high temperature, the temperature of the gas entering the gas storage box 24 is also high, and some pesticides will become ineffective under high temperature conditions. When the pesticide has a lower temperature requirement, the filtered exhaust gas cannot be used to boost the spraying pressure of the atomizing nozzle 4. Therefore, an exhaust assembly 25 is connected to the gas collecting box 21.

[0041] The exhaust component 25 includes a vent pipe 251 fixedly connected to the gas collecting box 21, the vent pipe 251 is communicated with the inside of the gas collecting box 21, a baffle 252 is slidably connected to the inside of the gas collecting box 21, and a solenoid valve 253 is fixedly connected to the gas collecting box 21, the solenoid valve 253 is used to control the sliding of the baffle 252; when the sprayed pesticide has a higher temperature requirement for the gas, the solenoid valve 253 controls the baffle 252 to slide to the position of the vent pipe 251, blocks the vent pipe 251, and allows the air flow to enter the intake pipe 221; when the sprayed pesticide cannot adapt to the low temperature, the solenoid valve 253 controls the baffle 252 to slide to the position of the intake pipe 221, allowing the exhaust gas to enter the vent pipe 251.

[0042] Among them, an air motor 254 is connected to the air vent pipe 251, and an air pump 255 is connected to the bottom of the air motor 254. A boost pipe 256 is arranged on the air motor 254, and the air pump 255 extends into the boost pipe 256. One end of the boost pipe 256 is open to facilitate the entry of air, and the other end is fixedly connected to the air storage tank 24 and extends into the air storage tank 24; wherein, the air motor 254 is called a pneumatic motor, which is a device for converting the pressure energy of compressed air into rotational mechanical energy. The exhaust gas generated by the engine 11 enters the air vent pipe 251 to drive the air motor 254 to work. On the one hand, the fan blades of the air motor 254 rotate to cool the exhaust gas. On the other hand, the air motor 254 rotates to drive the air pump 255 to work. The operation of the air pump 255 makes the boost pipe 256 in a negative pressure state, that is, it can introduce air into the air storage tank 24 to supplement the pressure in the air storage tank 24.

[0043] In addition, one end of the vent pipe 251 away from the gas collecting box 21 is fixedly connected to the filter cartridge 26, and a material blocking cylinder 223 with the same structure is arranged in the filter cartridge 26. A discharge pipe 231 with the same structure is arranged between the filter cartridge 26 and the storage box 23. The discharge pipe 231 introduces the ammonium hydroxide solution in the storage box 23 into the filter cartridge 26 to react with the exhaust gas in the filter cartridge 26. The top of the filter cartridge 26 is fixedly connected to a discharge pipe 261. The discharge pipe 261 discharges the gas generated by the reaction of the exhaust gas and the ammonium hydroxide solution directly into the air to prevent harmful gases in the exhaust gas from directly entering the air.

[0044] Reference Figure 8 The bottom of the purification cylinder 22 and the filter cylinder 26 are fixedly connected with a return pipe 27, and one end of the return pipe 27 away from the purification cylinder 22 and the filter cylinder 26 is connected to the spray box 41. The return pipe 27 introduces the ammonium hydroxide solution, ammonium nitrate, nitric acid and other solutions in the purification cylinder 22 and the filter cylinder 26 into the spray box 41, so that the ammonium hydroxide solution, ammonium nitrate, nitric acid and other solutions are sprayed into the soil along with the pesticides. The ammonium hydroxide solution, ammonium nitrate and nitric acid react with the metal elements in the soil to form nitrogen fertilizer, thereby achieving the effect of fertilizing the soil, which not only purifies the exhaust gas, but also makes full use of the exhaust gas.

[0045] The implementation principle of a fuel-driven drone for pesticide spraying in the embodiment of the present application is as follows: the exhaust gas generated by the engine 11 enters the gas collecting box 21. When the pesticide can adapt to the high temperature, the solenoid valve 253 controls the baffle 252 to slide to the position of the vent pipe 251, blocking the vent pipe 251, allowing the air flow to enter the intake pipe 221, and the exhaust gas enters the purification cylinder 22, and then enters the ammonium bicarbonate solution at the bottom of the blocking cylinder 223 after passing through the air intake cavity. The catalyst converts the nitric oxide in the exhaust gas into nitrogen dioxide, and the nitrogen dioxide first reacts with the water in the ammonium bicarbonate solution to generate The nitric acid reacts with ammonium bicarbonate to generate ammonia, carbon dioxide and water, thereby converting the nitrogen oxides in the tail gas into gases with less air pollution. The gases enter the gas storage box 24 through the air guide pipe 226 for storage; an air outlet pipe 245 is fixedly connected to the gas storage box 24, and the end of the air outlet pipe 245 away from the spray box 41 extends into the spray box 41. The air outlet pipe 245 guides the gas in the air storage box 24 to the spray box 41, and the air storage box 24 outputs the self-pressurized gas through the air outlet pipe 245 to make the pesticide particles reach the atomization degree, so as to ensure the penetration effect of the spraying.

[0046] When the pesticide cannot adapt to high temperature conditions, the solenoid valve 253 controls the baffle 252 to slide to the position of the air inlet pipe 221, so that the tail gas is introduced into the exhaust pipe 251, and the tail gas reacts with the ammonium hydroxide solution in the filter cartridge 26. The exhaust pipe 261 directly discharges the gas generated by the reaction of the tail gas and the ammonium hydroxide solution into the air, so as to prevent the harmful gas in the tail gas from directly entering the air; at the same time, the pneumatic motor 254 is a device that converts the pressure energy of compressed air into rotational mechanical energy. The pneumatic motor 254 rotates and drives the air pump 255 to work. The operation of the air pump 255 makes the boost pipe 256 in a negative pressure state, that is, it can introduce air into the air storage box 24, and supplement the pressure in the air storage box 24, ensuring that the air storage box 24 exports the self-pressurized gas through the outlet pipe 245 to make the pesticide particles reach the atomization degree.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fuel-driven drone for pesticide spraying, comprising a drone body (1), an engine (11) being provided on the drone body (1), an exhaust pipe (111) being provided on the engine (11), a plurality of pesticide boxes (3) being provided at the bottom of the drone body (1), a discharge pipe (231) being provided on the pesticide box (3), characterized in that: The exhaust pipe (111) is connected to an exhaust gas purification device (2); The exhaust gas purification device (2) comprises an air collecting box (21) fixedly connected to the drone body (1), the exhaust pipe (111) being connected to the inside of the air collecting box (21), a purification cylinder (22) being provided on the drone body (1), an air intake pipe (221) being fixedly connected to one side of the purification cylinder (22), the air intake pipe (221) being connected to the inside of the air collecting box (21), the purification cylinder (22) containing ammonium bicarbonate solution and a catalyst, an air storage box (24) being provided on the drone body (1), an air guide pipe (226) being provided at the top of the purification cylinder (22), the end of the air guide pipe (226) being away from the purification cylinder (22) extending into the air storage box (24), and an air outlet pipe (245) being fixedly connected to the bottom of the air storage box (24); A spray box (41) is fixedly connected to the drone body (1), a plurality of atomizing nozzles (4) are connected to the spray box (41), an end of the air outlet pipe (245) away from the air storage box (24) is connected to the spray box (41), and a discharge pipe (231) is connected to the inside of the spray box (41).

2. A fuel-driven drone for pesticide spraying according to claim 1, characterized in that: The bottom of the purification cylinder (22) is fixedly connected to a material-blocking cylinder (223), and the top of the material-blocking cylinder (223) is fixedly connected to a convex edge (224). The convex edge (224) is turned toward the outside of the material-blocking cylinder (223), and the convex edge (224) is fixedly connected to the inner wall of the purification cylinder (22). An air inlet cavity is formed between the convex edge (224), the material-blocking cylinder (223) and the inner wall of the purification cylinder (22), and the bottom and top of the material-blocking cylinder (223) are hollow.

3. A fuel-driven drone for pesticide spraying according to claim 2, characterized in that: A plurality of filter screens (225) are fixedly connected to the bottom of the material blocking cylinder (223).

4. A fuel-driven drone for pesticide spraying according to claim 1, characterized in that: A return spring (241) is fixedly connected to the top of the air storage box (24). The return spring (241) is vertically arranged, one end of the return spring (241) is fixedly connected to the top of the air storage box (24), and the bottom of the return spring (241) is fixedly connected to a piston plate (242). The diameter of the piston plate (242) is the same as the inner diameter of the air storage box (24).

5. A fuel-driven drone for pesticide spraying according to claim 1 or 4, characterized in that: The air storage box (24) is fixedly connected to a pressure regulating pipe (243), and the pressure regulating pipe (243) is fixedly connected to a pressure regulating valve (244).

6. A fuel-driven drone for pesticide spraying according to claim 1, characterized in that: The gas collecting box (21) is connected to an exhaust assembly (25); The exhaust assembly (25) comprises a vent pipe (251) fixedly connected to the air collecting box (21), the vent pipe (251) being communicated with the inside of the air collecting box (21), the vent pipe (251) being connected to a filter cartridge (26), the top of the filter cartridge (26) being fixedly connected to a discharge pipe (261), a baffle (252) being slidably connected inside the air collecting box (21), a solenoid valve (253) being fixedly connected to the air collecting box (21), the solenoid valve (253) being used to control the sliding of the baffle (252) according to the temperature requirement of the pesticide, thereby controlling the exhaust gas to enter the intake pipe (221) or the exhaust pipe (111).

7. A fuel-driven drone for pesticide spraying according to claim 6, characterized in that: The air release pipe (251) is connected to an air motor (254), the bottom of the air motor (254) is connected to an air pump (255), a boost pipe (256) is provided on the air motor (254), the air pump (255) extends into the boost pipe (256), one end of the boost pipe (256) is open to facilitate air entry, and the other end is fixedly connected to the air storage box (24) and extends into the air storage box (24).

8. The fuel-driven drone for pesticide spraying according to claim 6, characterized in that: The bottoms of the purification cylinder (22) and the filter cylinder (26) are fixedly connected with a return pipe (27), and one end of the return pipe (27) away from the purification cylinder (22) and the filter cylinder (26) is connected to the spray box (41).

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