An agricultural spraying apparatus

Abstract

The present application relates to a kind of agricultural spraying equipment, including agricultural vehicle, spray bar, spray head, liquid supply assembly, outer tube, first piston, liquid passage, inner tube, connecting piece and roller;The present application supplies liquid fertilizer to spray bar by liquid supply assembly, liquid fertilizer enters outer tube, liquid fertilizer in outer tube extrudes first piston downward, part of liquid fertilizer passes through liquid passage and reaches spray head by inner tube, liquid fertilizer sprayed from spray head is sprayed on the crops below, the pressure of liquid fertilizer and the support of ground form reaction force and are in relative balance, the height of spray head and ground is kept in preset range, when encountering bumpy road, the height of spray head and ground is kept unchanged under the fluid pressure of liquid fertilizer, improve the uniformity of liquid fertilizer spraying, it is suitable for using in the region such as hilly, slope and undulating land etc.

Description

Technical Field

[0001] This invention relates to the field of spraying equipment technology, and in particular to an agricultural spraying device. Background Technology

[0002] Agriculture is an industry that utilizes the growth and development patterns of plants and animals to obtain products through artificial cultivation. It belongs to the primary sector. In a narrow sense, agriculture refers to crop cultivation; in a broad sense, it includes agriculture (i.e., crop cultivation), forestry, animal husbandry, fisheries, and the industries that provide support for these activities. Agriculture is not only the main lifeline of the national economy but also the primary source of food and clothing for the vast majority of people. It is a crucial industry for maintaining rural stability, promoting economic development, and ensuring national food security.

[0003] During the growth of crops, fertilizers are usually applied regularly to promote their growth. Current methods of crop fertilization include: manually pre-burying solid nutrients in the soil and spraying liquid nutrients. While manually pre-burying solid nutrients ensures sufficient absorption by the crop roots, it requires significant manual labor and is inefficient. Liquid nutrient spraying works by using a water pump to deliver liquid fertilizer from a storage tank to a spray bar, from which it is sprayed onto the crop leaves. Although this method is more efficient, in areas with significant terrain undulations, such as hills, slopes, and uneven terrain, the spraying equipment's movement during transport causes the spray bar to bounce up and down, resulting in it constantly hitting the ground or being raised too high. First, if the spray boom is too high, the droplets from a single nozzle need to travel a longer distance to reach the plant's leaves, resulting in a wider coverage area. This leads to insufficient overlap between droplet areas from adjacent nozzles, creating streaks of missed areas and blind spots, affecting spray uniformity. Conversely, if the spray boom is too low, the droplet coverage narrows, causing excessive overlap between droplet areas from adjacent nozzles, resulting in streaks of excessive pesticide deposits and wasting liquid fertilizer, also affecting spray uniformity. Second, if the spray boom is too high, the droplets travel a long distance, making them more susceptible to wind influence and increasing the risk of drift. This not only wastes pesticide but may also harm the surrounding environment. The droplets have less kinetic energy when impacting the leaf surface, resulting in poor adhesion, especially since large droplets may bounce and roll off, also affecting spray uniformity. If the spray boom is too low, the droplet distribution is too concentrated, and the impact force is too great, potentially causing small droplets to splash into the soil, resulting in waste and affecting spray uniformity as well. Summary of the Invention

[0004] This invention provides an agricultural spraying device that can solve the problem of uneven spraying of liquid fertilizer during the agricultural spraying process in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an agricultural spraying device, including an agricultural vehicle, a spray bar, a nozzle, and a liquid supply assembly connected to the spray bar. The spray bar is horizontally mounted on the agricultural vehicle. At least one outer tube communicating with the lower end of the spray bar is vertically mounted therein. A first piston is slidably connected inside the outer tube. A liquid passage hole is formed on the first piston. An inner tube extending from the lower end of the outer tube is fixedly connected to the lower end of the first piston. The interior of the inner tube communicates with the interior of the outer tube through the liquid passage hole. A nozzle communicating with the interior of the inner tube is mounted at the lower end of the inner tube. A connector is fixedly connected to the lower part of the outer side wall of the inner tube. A roller for contacting the ground is connected to the lower end of the connector.

[0006] Preferably, a support is provided on the inner wall of the inner tube, and a water turbine blade is rotatably connected to the support. An inner magnetic ring is coaxially arranged on the water turbine blade, and an outer magnetic ring coaxial with the inner magnetic ring is rotatably connected to the outer wall of the inner tube. Multiple fan blades are arranged on the outer magnetic ring.

[0007] Specifically, the liquid fertilizer's flow rate increases after passing through the orifice. As it flows over the water turbine blades, it drives the blades to rotate, which in turn drives the inner magnetic ring. Under magnetic force, the inner magnetic ring drives the outer magnetic ring, which in turn drives the fan blades to rotate, generating a downward airflow. On one hand, this airflow blows through the crop leaves, creating gaps between them. This allows the liquid fertilizer sprayed from the nozzle to pass through these gaps and spray onto the middle and lower layers of leaves, improving the overall coverage and uniformity of the spray. On the other hand, the airflow provides a downward driving force for the droplets, reducing droplet dispersion, increasing the utilization rate of the liquid fertilizer, reducing waste, and improving uniformity.

[0008] Preferably, the connector is an inverted "L"-shaped baffle, and a recycling trough is provided around the lower part of the baffle.

[0009] Specifically, a small number of droplets that drift to both sides are blocked by the baffle and gather on the two side walls of the baffle to form a liquid flow, which finally flows into the recycling tank for collection, thereby improving the utilization rate of liquid fertilizer and reducing liquid fertilizer waste.

[0010] Preferably, a filter screen is provided at the upper opening of the recycling tank.

[0011] Specifically, the filter screen filters the recovered liquid fertilizer to prevent impurities from mixing into the recovered liquid fertilizer and clogging or corroding the spraying equipment.

[0012] Preferably, the baffle has an opening for allowing the recycled liquid fertilizer to flow.

[0013] Preferably, the spray bar is fixedly connected to a return pipe connected to the liquid supply assembly. The return pipe is inclined. The lower end of the outer pipe is fixedly connected to a negative pressure pipe coaxial with it. A second piston is slidably connected inside the negative pressure pipe. The second piston is fixedly connected to the outer wall of the inner pipe. The negative pressure pipe is connected to a first conduit extending into the bottom of the recovery tank. A second conduit is connected between the negative pressure pipe and the return pipe. One-way valves are respectively provided on the first conduit and the second conduit.

[0014] Specifically, when navigating areas with undulating terrain, the inner tube continuously rises or falls. During this process, the second piston slides inside the negative pressure tube. Since the one-way valve on the first conduit only allows liquid to enter the negative pressure tube, and the one-way valve on the second conduit only allows liquid to exit the negative pressure tube, the volume change within the negative pressure tube will generate negative pressure to draw in the liquid fertilizer in the recovery tank. The liquid fertilizer passes through the first conduit, the negative pressure tube, and the second conduit in sequence before entering the return pipe. Due to the inclined design of the return pipe, the liquid fertilizer entering the return pipe flows to the liquid supply component under the action of gravity, thus being reused and reducing the waste of liquid fertilizer.

[0015] Preferably, the liquid supply assembly includes a liquid storage container and a water pump. The liquid storage container is fixedly connected to the agricultural vehicle, the inlet end of the water pump is connected to the liquid storage container, and the outlet end of the water pump is connected to the spray bar.

[0016] Specifically, the water pump provides stable fluid pressure and flow rate, delivering the liquid fertilizer stored in the storage container to the nozzle for spraying the crops.

[0017] Preferably, the agricultural vehicle includes wheels, and a driving bevel gear is coaxially arranged on the wheels. The driving bevel gear meshes with a driven bevel gear that is rotatably connected to the liquid storage container. A stirrer located inside the liquid storage container is coaxially arranged on the driven bevel gear.

[0018] Specifically, during the movement of the agricultural vehicle, the driving bevel gear rotates, which in turn drives the agitator to rotate through the driven bevel gear, thereby stirring the liquid fertilizer in real time, improving the mixing uniformity of the liquid fertilizer, and thus improving the uniformity of liquid fertilizer spraying.

[0019] Compared to existing technologies, this invention utilizes a combination of an agricultural vehicle, a spray boom, a nozzle, a liquid supply assembly, an outer pipe, a first piston, a liquid passage hole, an inner pipe, connectors, and rollers. The agricultural vehicle moves the spray boom across the field, while the liquid supply assembly supplies liquid fertilizer to the spray boom. The liquid fertilizer enters the outer pipe, where it presses downwards against the first piston. Some of the liquid fertilizer passes through the liquid passage hole and then through the inner pipe to reach the nozzle. The liquid fertilizer sprayed from the nozzle lands on the crops below. The pressure of the liquid fertilizer reacts with the supporting force of the ground, creating a relatively flat surface. In a balanced state, the height of the nozzle above the ground remains within a preset range. When encountering a raised road surface, the connector moves the first piston upward through the inner tube, which in turn moves the nozzle upward, keeping the height of the nozzle above the ground constant. When encountering a sunken road surface, the pressure of the liquid fertilizer presses the first piston downward, causing it to move downward. The first piston then moves the nozzle downward through the inner tube, again keeping the height of the nozzle above the ground constant. This improves the uniformity of liquid fertilizer spraying and is suitable for use in areas with drastic terrain such as hills, slopes, and uneven terrain. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the main cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 For the present invention Figure 2 Enlarged schematic diagram of the structure at point B; Figure 5 For the present invention Figure 1 Schematic diagram of the cross-sectional structure along the CC direction; Figure 6 This is a side view of the baffle structure of the present invention.

[0021] In the diagram: 1. Agricultural vehicle; 2. Spray boom; 3. Nozzle; 4. Outer pipe; 5. First piston; 6. Liquid passage hole; 7. Inner pipe; 8. Baffle; 9. Roller; 10. Support; 11. Water turbine blade; 12. Inner magnetic ring; 13. Outer magnetic ring; 14. Fan blade; 15. Recovery tank; 16. Filter screen; 17. Opening; 18. Negative pressure pipe; 19. Second piston; 20. First conduit; 21. Second conduit; 22. Return pipe; 23. Liquid storage container; 24. Water pump; 25. Driving bevel gear; 26. Driven bevel gear; 27. Agitator. Detailed Implementation

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] like Figures 1 to 6 As shown, an agricultural spraying device includes an agricultural carrier 1, a spray bar 2, a nozzle 3, and a liquid supply assembly connected to the spray bar 2. The spray bar 2 is horizontally mounted on the agricultural carrier 1. At least one outer tube 4, which communicates with the lower end of the spray bar 2, is vertically mounted on the lower end of the spray bar 2. A first piston 5 is slidably connected to the inside of the outer tube 4. A liquid passage hole 6 is opened on the first piston 5. An inner tube 7, whose lower end extends from the lower end of the outer tube 4, is fixedly connected to the lower end of the first piston 5. The interior of the inner tube 7 communicates with the interior of the outer tube 4 through the liquid passage hole 6. A nozzle 3, which communicates with the interior of the inner tube 7, is mounted on the lower end of the outer side wall of the inner tube 7. A connector is fixedly connected to the lower part of the outer side wall of the inner tube 7. A roller 9 for contacting the ground is connected to the lower end of the connector.

[0024] In practical use, the agricultural vehicle 1 moves the spray boom 2 in the field. The liquid supply component supplies liquid fertilizer to the spray boom 2. The liquid fertilizer enters the outer tube 4. The liquid fertilizer in the outer tube 4 pushes down the first piston 5. Some of the liquid fertilizer passes through the liquid outlet 6 and reaches the nozzle 3 through the inner tube 7. The liquid fertilizer sprayed from the nozzle 3 is sprayed onto the crops below. The pressure of the liquid fertilizer and the support force of the ground form a reaction force and are in a relatively balanced state. The height of the nozzle 3 from the ground is kept within a preset range. When encountering a raised road surface, the connector drives the first piston 5 to move upward through the inner tube 7. The inner tube 7 drives the nozzle 3 to move upward, so that the height of the nozzle 3 from the ground remains unchanged. When encountering a sunken road surface, the pressure of the liquid fertilizer pushes the first piston 5 downward, causing the first piston 5 to move downward. The first piston 5 drives the nozzle 3 to move downward through the inner tube 7, so that the height of the nozzle 3 from the ground remains unchanged.

[0025] In order to achieve uniform spraying of liquid fertilizer, preferably, a support 10 is provided on the inner wall of the inner tube 7, a water wheel blade 11 is rotatably connected to the support 10, an inner magnetic ring 12 is coaxially arranged on the water wheel blade 11, and an outer magnetic ring 13 coaxial with the inner magnetic ring 12 is rotatably connected to the outer wall of the inner tube 7, and multiple fan blades 14 are arranged on the outer magnetic ring 13.

[0026] Specifically, the liquid fertilizer increases in flow velocity after passing through the liquid outlet 6. As the liquid fertilizer flows through the water turbine blades 11, it drives the blades 11 to rotate. The water turbine blades 11 drive the inner magnetic ring 12 to rotate. Under the action of magnetic force, the inner magnetic ring 12 drives the outer magnetic ring 13 to rotate. The outer magnetic ring 13 drives the fan blades 14 to rotate, generating downward wind force. On the one hand, it blows the crop leaves, creating gaps between the crop leaves, allowing the liquid fertilizer sprayed from the nozzle 3 to pass through the gaps between the upper leaves and spray onto the middle and lower leaves, improving the comprehensiveness and uniformity of the spraying. On the other hand, the wind force provides downward driving force for the droplets, reducing droplet dispersion, improving the utilization rate of liquid fertilizer, reducing liquid fertilizer waste, and improving uniformity.

[0027] Preferably, the connector is an inverted "L"-shaped baffle 8, and a recycling trough 15 is provided around the lower part of the baffle 8.

[0028] Specifically, a small number of droplets that drift to both sides are blocked by baffle 8 and gather on the two side walls of baffle 8 to form a liquid flow, which finally flows into the recycling tank 15 for collection, thereby improving the utilization rate of liquid fertilizer and reducing liquid fertilizer waste.

[0029] Preferably, a filter screen 16 is provided at the upper opening of the recycling tank 15.

[0030] Specifically, filter screen 16 filters the recovered liquid fertilizer to prevent impurities from mixing into the recovered liquid fertilizer and clogging or corroding the spraying equipment.

[0031] Preferably, the spray bar 2 is fixedly connected to a return pipe 22 connected to the liquid supply assembly. The return pipe 22 is inclined. The lower end of the outer pipe 4 is fixedly connected to a negative pressure pipe 18 coaxial with it. The inside of the negative pressure pipe 18 is slidably connected to a second piston 19. The second piston 19 is fixedly connected to the outer wall of the inner pipe 7. The negative pressure pipe 18 is connected to a first conduit 20 that extends into the bottom of the recovery tank 15. A second conduit 21 is connected between the negative pressure pipe 18 and the return pipe 22. One-way valves are respectively provided on the first conduit 20 and the second conduit 21. An opening 17 is provided on the baffle 8 for the flow of the recovered liquid fertilizer.

[0032] Specifically, when traveling in areas with undulating terrain, the inner tube 7 continuously rises or falls. During the rising and falling process, the second piston 19 slides inside the negative pressure tube 18. Since the one-way valve on the first conduit 20 only allows liquid to enter the negative pressure tube 18, and the one-way valve on the second conduit 21 only allows liquid to exit from the negative pressure tube 18, the volume change in the negative pressure tube 18 will generate negative pressure to absorb the liquid fertilizer in the recovery tank 15. The liquid fertilizer passes through the first conduit 20, the negative pressure tube 18, and the second conduit 21 in sequence and then enters the return tube 22. Since the return tube 22 is inclined, the liquid fertilizer entering the return tube 22 flows to the liquid supply component under the action of gravity and is reused, reducing the waste of liquid fertilizer.

[0033] In order to achieve the purpose of spraying liquid fertilizer onto crops, preferably, the liquid supply component includes a liquid storage container 23 and a water pump 24. The water pump 24 is a constant pressure pump. The liquid storage container 23 is fixedly connected to the agricultural carrier 1. The inlet end of the water pump 24 is connected to the liquid storage container 23, and the outlet end of the water pump 24 is connected to the spray bar 2.

[0034] Specifically, the water pump 24 provides stable fluid pressure and flow rate, delivering the liquid fertilizer stored in the storage container 23 to the nozzle 3 for spraying the crops.

[0035] In order to achieve the purpose of uniform spraying of liquid fertilizer, preferably, the agricultural vehicle 1 includes wheels, a driving bevel gear 25 is coaxially arranged on the wheels, the driving bevel gear 25 meshes with a driven bevel gear 26 which is rotatably connected to the liquid storage container 23, and a stirrer 27 located inside the liquid storage container 23 is coaxially arranged on the driven bevel gear 26.

[0036] Specifically, during the movement of the agricultural vehicle 1, the active bevel gear 25 is driven to rotate, and the active bevel gear 25 drives the agitator 27 to rotate through the driven bevel gear 26, thereby stirring the liquid fertilizer in real time, improving the mixing uniformity of the liquid fertilizer, and thus improving the uniformity of the liquid fertilizer spraying.

[0037] Compared to existing technologies, this invention utilizes the coordinated arrangement of an agricultural carrier 1, a spray boom 2, a nozzle 3, a liquid supply assembly, an outer pipe 4, a first piston 5, a liquid passage hole 6, an inner pipe 7, connecting parts, and rollers 9. The agricultural carrier 1 moves the spray boom 2 across the field, and the liquid supply assembly supplies liquid fertilizer to the spray boom 2. The liquid fertilizer enters the outer pipe 4, and the liquid fertilizer inside the outer pipe 4 pushes downward against the first piston 5. Some of the liquid fertilizer passes through the liquid passage hole 6 and then through the inner pipe 7 to reach the nozzle 3. The liquid fertilizer sprayed from the nozzle 3 is sprayed onto the crops below. The pressure of the liquid fertilizer and the supporting force of the ground create a reaction force and are in a state of equilibrium. In a relatively balanced state, the height of the nozzle 3 above the ground remains within a preset range. When encountering a raised road surface, the connector drives the first piston 5 upward through the inner tube 7, which in turn drives the nozzle 3 upward, keeping the height of the nozzle 3 above the ground constant. When encountering a sunken road surface, the pressure of the liquid fertilizer presses the first piston 5 downward, causing it to move downward. The first piston 5 then drives the nozzle 3 downward through the inner tube 7, again keeping the height of the nozzle 3 above the ground constant. This improves the uniformity of liquid fertilizer spraying and is suitable for use in areas with drastic terrain undulations, such as hills, slopes, and uneven terrain.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An agricultural spraying device, comprising an agricultural vehicle, a spray boom, a nozzle, and a liquid supply assembly connected to the spray boom, characterized in that: The spray bar is horizontally mounted on an agricultural vehicle. At least one outer tube is vertically mounted at the lower end of the spray bar, communicating with its interior. A first piston is slidably connected inside the outer tube. The first piston has a liquid passage hole. An inner tube is fixedly connected to the lower end of the first piston, with its lower end extending from the lower end of the outer tube. The interior of the inner tube communicates with the interior of the outer tube through the liquid passage hole. A nozzle communicating with its interior is mounted at the lower end of the inner tube. A connector is fixedly connected to the lower part of the outer side wall of the inner tube. A roller for contacting the ground is connected to the lower end of the connector.

2. The agricultural spraying equipment according to claim 1, characterized in that: A bracket is provided on the inner wall of the inner tube, and a water turbine blade is rotatably connected to the bracket. An inner magnetic ring is coaxially arranged on the water turbine blade. An outer magnetic ring coaxial with the inner magnetic ring is rotatably connected to the outer wall of the inner tube, and multiple fan blades are arranged on the outer magnetic ring.

3. The agricultural spraying equipment according to claim 1, characterized in that: The connector is an inverted "L"-shaped baffle, and a recycling trough is provided around the lower part of the baffle.

4. An agricultural spraying device according to claim 3, characterized in that: A filter screen is installed at the upper opening of the recycling tank.

5. An agricultural spraying device according to claim 3, characterized in that: The baffle has openings for allowing the recycled liquid fertilizer to flow.

6. An agricultural spraying device according to claim 3, characterized in that: The spray bar is fixedly connected to a return pipe connected to the liquid supply assembly. The return pipe is inclined. The lower end of the outer pipe is fixedly connected to a negative pressure pipe coaxial with it. A second piston is slidably connected inside the negative pressure pipe. The second piston is fixedly connected to the outer wall of the inner pipe. The negative pressure pipe is connected to a first conduit extending into the bottom of the recovery tank. A second conduit is connected between the negative pressure pipe and the return pipe. One-way valves are respectively provided on the first conduit and the second conduit.

7. An agricultural spraying device according to claim 1, characterized in that: The liquid supply assembly includes a liquid storage container and a water pump. The liquid storage container is fixedly connected to the agricultural vehicle. The inlet end of the water pump is connected to the liquid storage container, and the outlet end of the water pump is connected to the spray bar.

8. An agricultural spraying device according to claim 7, characterized in that: The agricultural vehicle includes wheels, and a driving bevel gear is coaxially mounted on the wheels. The driving bevel gear meshes with a driven bevel gear that is rotatably connected to the liquid storage container. A stirrer located inside the liquid storage container is coaxially mounted on the driven bevel gear.

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