A plant protection nozzle and a plant protection spraying device

Abstract

The present invention provides a plant protection nozzle and a plant protection spraying device. The plant protection nozzle comprises a shell, a separation cylinder is coaxially sleeved in the shell, and an inner cavity with an opening at the left end and a closed right end is formed between the shell and the separation cylinder; a jet cavity with an opening at the right end and a closed left end is arranged in the separation cylinder; a plurality of jet holes for connecting the inner cavity and the jet cavity are arranged on the cylinder wall of the separation cylinder, and the jet holes are at a set angle to the axis of the inner cavity. The plant protection nozzle improves the flow of liquid medicine, reduces energy loss, and improves the utilization rate of liquid medicine by changing the internal structure of the device. The plant protection spraying device can flexibly adjust the angle and direction of the nozzle according to the morphology and growth stage of different crops, improve the utilization rate of the medicine, and reduce environmental pollution.

Description

Technical Field

[0001] The invention relates to the technical field of plant protection spraying devices, and in particular to a plant protection spraying head and a plant protection spraying device. Background Art

[0002] With the rapid development of modern agriculture, precision spraying technology for plant protection is gradually becoming a key technology for increasing crop yields and preventing and controlling pests and diseases. However, traditional spraying equipment has exposed a series of problems during application, such as poor spraying uniformity, insufficient crop coverage, and low spraying efficiency. These problems not only cause a waste of pesticide resources, but also have an adverse impact on the environment and increase the economic burden of agricultural production. Summary of the invention

[0003] In view of the above problems, the present invention provides a plant protection nozzle and a plant protection spraying device, which improves the flow of liquid medicine, reduces energy loss, and improves the utilization rate of liquid medicine by changing the internal structure of the device. The plant protection spraying device can flexibly adjust the angle and direction of the nozzle according to the morphology and growth stage of different crops, improve the utilization rate of the medicine, and reduce environmental pollution.

[0004] A plant protection nozzle comprises an outer shell, wherein an isolating cylinder is coaxially sleeved inside the outer shell, and an inner cavity with an open left end and a closed right end is formed between the outer shell and the isolating cylinder; a jet cavity with an open right end and a closed left end is arranged in the isolating cylinder; a plurality of jet holes for connecting the inner cavity and the jet cavity are arranged on the cylinder wall of the isolating cylinder, and the jet holes form a set angle with the axis of the inner cavity.

[0005] Preferably, the outer end surface of the left end of the isolation cylinder is provided with a plurality of concave-convex micro-textures.

[0006] Preferably, the protrusions of the concavo-convex micro-texture are ladder columns, and the cross-sectional dimensions of the ladder columns decrease gradually from the outer end surface of the isolation tube to the left.

[0007] Preferably, the end of the ladder column is spherical.

[0008] Preferably, the concave surface of the concave-convex micro-texture is the end surface portion of the isolation tube between two adjacent ladder columns.

[0009] Preferably, the inner cavity comprises a first cavity and a second cavity which are arranged in a stepped manner from left to right, and the diameter of the first cavity is greater than the diameter of the second cavity.

[0010] Preferably, the first cavity is a conical structure with a diameter gradually decreasing from left to right, and a wavy micro-texture is provided on the surface of the first cavity.

[0011] Preferably, the surface of the wavy micro-texture is provided with honeycomb-shaped pits.

[0012] Preferably, the pit is a hexagonal structure.

[0013] Preferably, the right end of the jet cavity is connected to a jet port, and the cross section of the jet port is a horizontal V-shape.

[0014] Preferably, the jet cavity is located in the second cavity.

[0015] Preferably, a sensor is provided at the left end of the inner cavity.

[0016] Preferably, the jet holes are in two rows, and the jet holes in each row are arranged in a straight line along the axial direction of the jet cavity.

[0017] The present invention also discloses a plant protection spraying device, comprising a base, to which a multi-angle rotating mechanical device is connected, to the end of which the above-mentioned plant protection spraying head is connected, and the interior of the base and the interior of the multi-angle rotating mechanical device are both provided with internal channels for conveying liquid medicine.

[0018] Preferably, the multi-angle rotating mechanical device includes a waist rotating joint, an upper body mechanism, a shoulder rotating joint, an upper arm mechanism, an elbow rotating joint, a forearm mechanism and a wrist rotating joint which are connected in sequence, the waist rotating joint is rotationally connected to the base, and the wrist rotating joint is rotationally connected to the plant protection nozzle.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention arranges a jet hole for connecting the inner cavity and the jet cavity on the wall of the isolation cylinder. The jet hole is arranged at a set angle to the axis of the inner cavity, which changes the original resistance mode of the fluid on the wall and restricts the increase of the viscous resistance of the jet surface; the jet surface reduces the fluid velocity near the wall and reduces the wall friction resistance; at the same time, the vortex cushion effect and the pushing effect generated by the jet reduce the friction resistance of the jet surface, and finally makes the jet surface show a better drag reduction effect.

[0021] 2. The present invention transports liquid medicine through the internal channels of the base and the multi-angle rotating mechanical device, and guides the liquid medicine to the plant protection nozzle, thereby further improving the accuracy of spraying, achieving precise spraying for plant protection operations, and improving the uniformity and coverage of spraying.

[0022] 3. The wavy micro-texture can reduce the resistance of the liquid medicine during flow. By guiding the liquid medicine to flow along the wavy surface of the inner cavity, the generation of turbulence can be reduced, thereby improving the edge effect of the original plant protection nozzle.

[0023] 4. The wavy honeycomb microtexture can promote the mixing of various liquid medicines, because promoting the mixing of liquid medicines when the fluids flow through these structures is crucial to the uniformity of the chemical reactions of the liquid medicines, and helps to improve the mixing efficiency; and this structure can control the flow pattern of the fluid, making it more uniform and reducing dead zones in the flow.

[0024] 5. The pits exhibit anisotropic characteristics in the liquid medicine transmission, which helps to more effectively disperse the fluid flow rate and pressure, reduce the movement state such as stirring flow that hinders the inflow and discharge of the fluid, and thus improve the liquid medicine transmission performance.

[0025] 6. The concave-convex microtexture can increase the contact area of ​​the drug solution on the microtextured surface, thereby improving the mixing efficiency of the drug solution; and the concave-convex structure can help reduce the deposition of particles in the drug solution on the surface; under high-speed flow, the concave-convex structure will cause the fluid to vibrate and generate sound waves; the narrow space in the microchannel area of ​​the concave-convex structure limits the movement range of the fluid, making the drug solution particles more inclined to flow in an orderly manner along the channel wall, thereby suppressing the generation of turbulence and prompting the drug solution to tend to transform into laminar flow.

[0026] 7. The gaps between the ladder columns form a maze-like passage. When the liquid medicine flows through, it will hinder and guide the flow of the liquid medicine, causing the streamline of the liquid medicine to bend. This curved streamline will increase the length of the liquid medicine flow path, thereby making the liquid medicine velocity distribution more uniform, reducing the velocity gradient in the nozzle, and then inhibiting the formation of turbulence, prompting the fluid to transform into laminar flow.

[0027] 8. The ladder column structure can also effectively inhibit the generation and development of vortices. In the absence of ladder columns, large-scale vortices are easily formed in the flow of the liquid medicine. These vortices will continue to break and reorganize, causing the movement of the liquid medicine to become chaotic and disordered. The presence of ladder columns will destroy the conditions for the formation of vortices, making it more difficult for the energy in the liquid medicine to gather to form a large-scale vortex structure, thereby keeping the liquid medicine in a relatively stable laminar state. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic diagram of the structure of the plant protection nozzle Figure 1 ;

[0030] Figure 2 This is a schematic diagram of the structure of the plant protection nozzle Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the structure of the plant protection nozzle Figure 3 ;

[0032] Figure 4 This is a schematic diagram of the structure of the plant protection nozzle Figure 4 ;

[0033] Figure 5 This is a schematic diagram of the structure of the plant protection nozzle Figure 5 ;

[0034] Figure 6 It is the unfolded image of wavy microtexture;

[0035] Figure 7 It is a structural schematic diagram of a plant protection spraying device;

[0036] In the figure, 1. shell; 2. injection port; 3. first cavity; 4. concave-convex micro-texture; 5. second cavity; 6. jet hole; 7. jet cavity; 8. isolation tube; 9. base fixing mechanism; 9.1. polygonal base plate; 9.2. motor; 9.3. base; 10. waist rotation joint; 11. upper body mechanism; 11.1. boss hollow connecting block; 11.2. upper body part; 12. shoulder rotation joint; 13. upper arm mechanism; 14. elbow rotation joint; 15. forearm mechanism; 16. wrist rotation joint; 17. plant protection nozzle. DETAILED DESCRIPTION

[0037] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] Embodiment 1

[0039] The present invention discloses a Figures 1 to 5 The plant protection nozzle shown in the figure has an isolating tube 8 coaxially sleeved in a shell 1 of the plant protection nozzle, and an inner cavity with an opening at the left end and a closed right end is formed between the shell 1 and the isolating tube 8. The inner cavity is a stepped structure, and the diameter of the first cavity 3 located in the left half is larger than the diameter of the second cavity 5 located in the right half. The first cavity 3 is a conical structure with a gradually decreasing diameter from left to right, and a wavy micro-texture is provided on the surface of the conical structure. The surface of the wavy micro-texture is provided with Figure 6The hexagonal pits shown are arranged in a honeycomb pattern. The wavy micro-texture can reduce the resistance of the liquid medicine during flow. By guiding the liquid medicine to flow along the wavy surface of the conical structure, the generation of turbulence can be reduced, thereby improving the edge effect of the plant protection nozzle. The hexagonal pits exhibit anisotropic characteristics in liquid medicine transmission, which helps to more effectively disperse the fluid flow rate and pressure, reduce the movement state such as stirring flow that hinders the inflow and discharge of the fluid, and thus improve the liquid medicine transmission performance. Honeycomb pits plus wavy micro-textures can promote mixing in a variety of liquid medicines, because promoting the mixing of liquid medicines when the fluid flows through these structures is crucial to the uniformity of the chemical reaction of the liquid medicine, which helps to improve the mixing efficiency. In addition, the structure can also control the flow pattern of the fluid to make it more uniform and reduce dead zones in the flow.

[0040] A jet cavity 7 with an opening at the right end and a closed left end is arranged in the isolation tube 8, and the right end of the jet cavity 7 is connected with a V-shaped jet port 2; two rows of jet holes 6 are arranged on the wall of the isolation tube 8, such as Figures 3 to 5 As shown, the two rows of jet holes 6 are arranged symmetrically about the axis of the isolation tube 8, the cross section of the jet holes 6 is circular, and the jet holes 6 are at a set angle to the axis of the inner cavity. The jet holes 6 form an earthworm back hole-like jet structure on the surface of the isolation tube 8, and the pressurized liquid is input into the jet cavity 7 through the jet holes 6 at a certain angle, forming a continuous jet phenomenon similar to the earthworm back hole. At the same jet direction angle θ, with the increase of the jet velocity v, the drag reduction rate gradually increases, and the drag reduction rate gradient changes significantly; at the same jet velocity v, with the gradual increase of the jet direction angle θ, the drag reduction rate changes in a similar trend, both showing a trend of first decreasing and then increasing, improving the flow performance of the inner cavity. This jet behavior imitating the earthworm back hole changes the original resistance mode of the fluid on the wall, and restricts the increase of the viscous resistance on the jet surface. The jet surface reduces the fluid velocity near the wall and reduces the wall friction resistance; at the same time, the vortex cushion effect and the pushing effect generated by the jet reduce the friction resistance of the jet surface, and finally the jet surface shows a good drag reduction effect. In the inner cavity, the mainstream field of the inner cavity flows at a certain speed, while the jet surface and the upper wall remain stationary. The fluid required for the jet of the injection port 2 is continuously provided to the jet cavity 7 through the jet hole 6, which can effectively reduce energy loss and improve the utilization rate of the liquid medicine.

[0041] like Figures 2 to 5As shown, a plurality of concave-convex micro-textures 4 are arranged on the outer end face of the left end of the isolation tube 8, and the protrusions of the concave-convex micro-textures 4 are ladder columns, and the ends of the ladder columns are spherical, and the cross-sectional dimensions of the ladder columns decrease successively from the outer end face of the isolation tube 8 to the left. The middle area of ​​the outer end face of the left end of the isolation tube 8 is a convex structure, and the concave surface is the end face of the isolation tube between two adjacent ladder columns. From the convex structure outward, the concave structure and the convex structure are staggered. The periodic concave-convex micro-texture can increase the contact area of ​​the liquid medicine on the micro-texture surface, thereby improving the mixing efficiency of the liquid medicine. And the concave-convex structure can help reduce the deposition of particles in the liquid medicine on the surface. In the case of high-speed flow, the concave-convex structure will cause the fluid to vibrate and generate sound waves. The narrow space of the microchannel area of ​​the concave-convex structure limits the range of motion of the fluid, so that the liquid medicine particles are more inclined to flow in an orderly manner along the channel wall, thereby suppressing the generation of turbulence and prompting the liquid medicine to have a tendency to transform into laminar flow.

[0042] The gaps between the micro-ladder columns form a maze-like passage. When the liquid medicine flows through, it will hinder and guide the flow of the liquid medicine, causing the streamline of the liquid medicine to bend. The curved streamline of the surrounding structure will increase the path length of the liquid medicine flow, thereby making the velocity distribution of the liquid medicine more uniform, reducing the velocity gradient in the nozzle, and then inhibiting the formation of turbulence, prompting the fluid to transform into laminar flow.

[0043] The micro-ladder column structure can also effectively inhibit the generation and development of vortices. In the absence of micro-ladder columns, the liquid medicine is prone to form large-scale vortices during the flow process. These vortices will constantly break and reorganize, causing the movement of the liquid medicine to become chaotic and disordered. The presence of micro-ladder columns will destroy the conditions for the formation of vortices, making it more difficult for the energy in the liquid medicine to gather to form a large-scale vortex structure, thereby keeping the liquid medicine in a relatively stable laminar state.

[0044] Embodiment 2

[0045] See also Figure 7 The present embodiment provides a plant protection spraying device, which can adjust multiple degrees of freedom. The device includes a base fixing mechanism 9, a waist rotation joint 10, an upper body mechanism 11, a shoulder rotation joint 12, an upper arm mechanism 13, an elbow rotation joint 14, a forearm mechanism 15, a wrist rotation joint 16 and a plant protection spraying head 17 connected in sequence from bottom to top.

[0046] The base fixing mechanism 9 includes a base 9.3, a motor 9.2 and two polygonal base plates 9.1 installed on the upper and lower ends of the base 9.3. The base 9.3 is an octagonal column, and the motor 9.2 is arranged on the base 9.3. The polygonal base plate 9.1 can be connected to the plant protection machinery through threaded hole bolts. The waist rotation joint 10 is arranged at the upper end of the base fixing mechanism 9 to realize the rotation of the plant protection spraying device on the horizontal plane. The upper body mechanism 11 includes an upper body part 11.2 and a boss hollow connecting block 11.1. The boss hollow connecting block 11.1 is arranged at the lower end of the upper body part 11.2 and is shaped like an arc column. The upper body mechanism 11 is connected to the waist rotation joint 10 through the boss hollow connecting block 11.1, and is an irregular columnar structure.

[0047] The shoulder rotation joint 12 is arranged at the upper end of the upper body mechanism 11 and is welded to the upper arm mechanism 13 as a whole, so that the plant protection spraying device can rotate in a vertical plane. The upper arm mechanism 13 connects the shoulder rotation joint 12 and the elbow rotation joint 14. A pipeline is provided inside the upper arm mechanism 13, and a special-shaped pipeline is provided outside to save materials and reduce dead weight. The elbow rotation joint 14 is welded to the forearm mechanism 15 as a whole, and the structure is a double special-shaped convex turntable shape, which is convenient for connection with the forearm mechanism 15. The forearm mechanism 15 is arranged at the front end of the elbow rotation joint 14, and the middle is a hollow channel, and the structure is a double special-shaped hollow pipe. The wrist rotation joint 16 is arranged in the middle of the forearm mechanism 15, and the structure is a cylindrical one. The plant protection nozzle 17 is arranged at the front end of the wrist rotation joint 16.

[0048] The plant protection spraying device transports the liquid medicine through the internal channel of the base 9.3, and the liquid medicine is guided to the spraying system. The waist rotation joint 10 is then used to rotate in the vertical plane to preliminarily control the flow direction of the liquid medicine. The upper body mechanism 11 coordinates with the upper arm mechanism 13 through the shoulder rotation joint 12 to further finely control the flow direction of the liquid medicine to meet different spraying needs.

[0049] The elbow rotation joint 14 connects the upper arm mechanism 13 and the lower arm mechanism 15, and allows the lower arm mechanism 15 to rotate in a vertical plane, so as to realize flexible adjustment of the spraying direction of the liquid medicine to adapt to the growth period and spraying requirements of different crops. The wrist rotation joint 16 is located at the end of the lower arm mechanism 15, and allows the plant protection nozzle 17 to rotate and position in multiple directions, further improving the accuracy of spraying. A sensor is provided at the connection end of the plant protection nozzle 17, which can further realize accurate spraying of plant protection operations, improve the uniformity and coverage of spraying, and can also monitor the distance between the nozzle and the crop in real time. For example, an ultrasonic sensor can continuously monitor the distance between the spraying equipment and the top of the crop, and transmit these distance data to the controller in real time. Then, the sensor transmits the monitored data to the control unit through the CANopen communication protocol, etc., which is crucial for the control unit to adjust the spraying parameters. Then, the control unit intelligently adjusts the spraying height and angle of the plant protection nozzle according to the data provided by the sensor. This ensures that the spraying height can be intelligently adjusted according to the contour of the crop, thereby achieving uniform spraying coverage.

[0050] Through real-time monitoring by sensors and intelligent adjustment of the control system, the spraying equipment can accurately control the spraying amount and spraying area of ​​pesticides, thereby improving the uniformity and coverage of spraying.

[0051] The above description is only the preferred implementation of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plant protection nozzle, characterized in that: The invention comprises a shell (1), wherein an isolating cylinder (8) is coaxially sleeved inside the shell (1), and an inner cavity with an open left end and a closed right end is formed between the shell (1) and the isolating cylinder (8); a jet cavity (7) with an open right end and a closed left end is provided inside the isolating cylinder (8); a plurality of jet holes (6) for connecting the inner cavity and the jet cavity are provided on the cylinder wall of the isolating cylinder (8), and the jet holes (6) form a set angle with the axis of the inner cavity; The left outer end surface of the isolation cylinder (8) is provided with a plurality of concave-convex micro-textures (4); The protrusions of the concavo-convex micro-texture (4) are ladder columns, the ends of which are spherical, and the cross-sectional dimensions of the ladder columns decrease successively from the outer end surface of the isolation tube to the left.

2. A plant protection nozzle according to claim 1, characterized in that: The inner cavity comprises a first cavity (3) and a second cavity (5) which are arranged in a stepped manner from left to right, and the diameter of the first cavity (3) is greater than the diameter of the second cavity (5).

3. The crop protection nozzle according to claim 2, characterized in that: The first cavity (3) is a conical structure with a diameter that gradually decreases from left to right, and a wavy micro-texture is provided on the surface of the first cavity (3).

4. The crop protection nozzle according to claim 3, characterized in that: The surface of the wavy micro-texture is provided with honeycomb-shaped pits.

5. The crop protection nozzle according to claim 1, characterized in that: The right end of the jet cavity (7) is connected to an injection port (2), and the cross section of the injection port (2) is a horizontal V-shape.

6. The crop protection nozzle according to claim 1, characterized in that: A sensor is arranged at the left end of the inner cavity.

7. A plant protection spraying device, characterized in that: The invention comprises a base fixing mechanism (9), to which a multi-angle rotating mechanical device is connected, and a plant protection nozzle according to any one of claims 1 to 6 is connected at the end of the multi-angle rotating mechanical device, and an internal channel for conveying liquid medicine is provided inside the base fixing mechanism (9) and inside the multi-angle rotating mechanical device.

8. A plant protection spraying device according to claim 7, characterized in that: The multi-angle rotating mechanical device comprises a waist rotating joint (10), an upper body mechanism (11), a shoulder rotating joint (12), an upper arm mechanism (13), an elbow rotating joint (14), a lower arm mechanism (15), and a wrist rotating joint (16) which are connected in sequence. The waist rotating joint (10) is rotationally connected to a base fixing mechanism (9), and the wrist rotating joint (16) is rotationally connected to a plant protection nozzle (17).

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