A multi-stage injection device

Abstract

The present invention belongs to the technical field of plant protection spray devices, and provides a multi-stage spray device, including a cavity, a rotating body and a nozzle. The top of the cavity is connected to a liquid inlet pipe, and the side of the cavity is provided with a plurality of liquid outlet holes; a plurality of rotating bodies are rotatably sleeved on the cavity, and the side of the rotating body is provided with mounting holes; the nozzle is detachably connected to the mounting hole, and the inner side wall of the nozzle is provided with a plurality of groups of sharp and blunt double-channel structures. The present invention drives the nozzle to different spray directions through a rotating body rotatably connected to the cavity. A combination of multiple rotating bodies can achieve different spray modes, improve the coverage and uniformity of the spray, and can adapt to the irrigation needs of crops of different heights and densities. The sharp and blunt double-channel structure provided on the inner wall of the nozzle can improve the mixing efficiency between different fluid components, reduce the turbulence of the fluid, stabilize the flow of the fluid after mixing, help to form a more uniform spray pattern, and improve the coverage and uniformity of the spray.

Description

Technical Field

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

[0002] In agricultural plant protection operations, the spraying effect of the spraying device directly affects the utilization rate of pesticides or nutrient solutions and the prevention and control effect of crop diseases and pests.

[0003] Currently, most of the widely used plant protection spray devices use pressure spray systems, which use a pump to pressurize the liquid and spray it through a nozzle. Although this type of device can achieve liquid atomization to a certain extent, it still has the following disadvantages:

[0004] Uneven atomization. The structural design of traditional nozzles often leads to inconsistent spray particle size. Some spray particles are too large to effectively adhere to the surface of crop leaves, while spray particles that are too small are easily blown away by the wind, resulting in waste of liquid medicine; nozzles are prone to wear. In order to achieve the ideal spray effect, existing injection devices use higher pump pressures. High pump pressures will increase the wear of the liquid on the inner wall of the nozzle and shorten its service life; the adaptability range is small. Faced with different crop heights and densities, traditional devices cannot flexibly adjust the spray pattern and are difficult to meet the needs of precise spraying. Summary of the Invention

[0005] The present invention provides a multi-stage injection device, aiming to solve the above technical problems.

[0006] The present invention is implemented as follows: a multi-stage injection device includes a cavity, a rotating body and a nozzle, the top of the cavity is connected to a liquid inlet pipe, and the side of the cavity is provided with multiple liquid outlet holes; multiple rotating bodies are rotatably connected to the cavity, and the side of the rotating body is provided with a mounting hole, and when the rotating body rotates, the mounting hole can be connected to the liquid outlet hole; the nozzle is detachably connected to the mounting hole, and the inner side wall of the nozzle is provided with multiple groups of sharp and blunt double-channel structures composed of rectangular protrusions and rectangular grooves of equal length.

[0007] Furthermore, the surfaces of the rectangular protrusion and the rectangular groove are provided with isosceles triangle sawtooth structures, and the width direction of the tooth surface of the sawtooth structure is perpendicular to the flow direction of the liquid.

[0008] Furthermore, the tooth density of the serration structure provided on the surface of the rectangular protrusion is smaller than the tooth density of the serration structure provided on the surface of the rectangular groove.

[0009] Furthermore, the tooth end angle of the sawtooth structure provided on the surface of the rectangular protrusion is an obtuse angle, and the tooth end angle of the sawtooth structure provided on the surface of the rectangular groove is an acute angle.

[0010] Furthermore, a T-shaped microchannel structure is provided between the sharp and blunt dual-channel structure and the inner wall of the nozzle, and the thickness of the T-shaped microchannel structure is equal to that of the wall between the rectangular protrusion and the rectangular groove.

[0011] Furthermore, the inner wall of the nozzle perpendicular to the liquid flow direction is provided with an array of water-repellent structures, which consists of a circular base and an elliptical top connected to the circular base, and the circular base and the elliptical top have a smooth arc transition.

[0012] Furthermore, the water-repellent structures in two adjacent rows are arranged in a staggered array.

[0013] Furthermore, a sealing edge is provided on the surface of the cavity between adjacent liquid outlet holes.

[0014] Furthermore, a sealing ring is provided on the surface of the cavity between adjacent rotating bodies.

[0015] Furthermore, a directional buckle with a bifurcated structure is provided on the bottom surface of the cavity, and the bifurcated structure corresponds to the positions of the plurality of liquid outlet holes one by one.

[0016] The multi-stage spray device provided by the present invention uses a rotating body rotatably connected to the cavity to drive the nozzle in different spray directions. The combination of multiple rotating bodies can achieve different spray patterns, improving the coverage and uniformity of the spray, and can adapt to the irrigation needs of crops of different heights and densities. The sharp and blunt dual flow channel structure on the inner wall of the nozzle can improve the mixing efficiency between different fluid components, reduce the turbulence of the fluid, stabilize the fluid flow after mixing, help to form a more uniform spray effect, improve the coverage and uniformity of the spray, and disperse the impact of the fluid on the inner wall of the nozzle, reducing wear and extending the service life of the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a multi-stage injection device provided in an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the cavity.

[0019] Figure 3 It is a structural diagram of a rotating body.

[0020] Figure 4 It is a schematic diagram of the nozzle structure.

[0021] Figure 5 is a cross-sectional view of the nozzle.

[0022] Figure 6 This is a set of expanded diagrams of sharp and blunt double channel structures and T-shaped microchannel structures.

[0023] Figure 7 is a schematic diagram of the water-repellent structure.

[0024] Figure 8 Schematic diagram of an array of water-repellent structures.

[0025] The numbers in the figure represent: 1-cavity, 2-liquid inlet pipe, 3-liquid outlet, 4-rotating body, 5-mounting hole, 6-nozzle, 7-rectangular protrusion, 8-rectangular groove, 9-sharp and blunt double flow channel structure, 10-T-shaped microchannel structure, 11-water repellent structure, 12-circular base, 13-elliptical top, 14-sealing edge, 15-sealing ring, 16-pointing buckle. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] See also Figures 1 to 8 An embodiment of the present invention provides a multi-stage injection device, including a cavity 1, a rotating body 4 and a nozzle 6. The top of the cavity 1 is connected to a liquid inlet pipe 2, and a plurality of liquid outlet holes 3 are opened on the side of the cavity 1.

[0028] The cavity 1 is a cylindrical structure with a hollow interior and a liquid inlet hole on the top. The outlet of the equipment for storing the liquid to be sprayed, such as a pesticide storage tank, is connected to the liquid inlet hole and connected to the cavity 1 through the liquid inlet pipe 2. The connection method between the liquid inlet pipe 2 and the cavity 1 can be a threaded connection or a plug-in connection.

[0029] There are nine liquid outlet holes 3 on the side of the cavity 1 in a 3×3 rectangular array. The three liquid outlet holes 3 in each layer face different directions, and the angle between the axes of two adjacent liquid outlet holes 3 is 60 degrees.

[0030] The plurality of rotating bodies 4 are rotatably connected to the cavity 1 . A mounting hole 5 is provided on the side of the rotating body 4 . When the rotating body 4 rotates, the mounting hole 5 can be connected to the liquid outlet 3 .

[0031] In the embodiment of the present invention, the rotating body 4 has an outer hexagonal and inner circular structure. The three rotating bodies 4 are arranged longitudinally and rotated to fit the cavity 1. Three of the six faces of the rotating body 4 are respectively provided with mounting holes 5. The three rotating bodies 4 can be rotated separately, so that the three mounting holes 5 can be aligned with the liquid outlet 3 at the same time, or one or two mounting holes 5 can be aligned with one or two liquid outlet holes 3.

[0032] The nozzle 6 is detachably connected to the mounting hole 5 , and the inner side wall of the nozzle 6 is provided with a plurality of sharp and blunt double flow channel structures 9 consisting of rectangular protrusions 7 and rectangular grooves 8 of equal length.

[0033] The nozzle 6 in the embodiment of the present invention is a fan-shaped nozzle, through which liquid is sprayed. The nozzle 6 is threadedly connected to the mounting hole 5, which is convenient for disassembly and replacement, and is beneficial for daily maintenance and cleaning.

[0034] By independently rotating the three rotating bodies 4, the nozzles 6 can be arranged into various configurations, achieving different spray patterns and ranges. This ensures uniform spraying, reduces blind spots, improves spraying efficiency, shortens operation time, reduces water and pesticide waste, improves resource utilization, and adapts to the irrigation needs of crops of varying heights and densities. Furthermore, the multi-layer spraying method disperses pressure during the spraying process, reducing wear on individual nozzles 6 and thereby improving the overall durability of the multi-stage spraying device.

[0035] In addition, in one embodiment of the present invention, a sealing rib 14 is provided on the surface of the cavity 1 between adjacent liquid outlet holes 3 , and a sealing ring 15 is provided on the surface of the cavity 1 between adjacent rotating bodies 4 .

[0036] The sealing edge 14 and the sealing ring 15 are used to separate the liquid, maintain the injection pressure in the space where the liquid is located, and ensure the injection effect.

[0037] A directional buckle 16 with a bifurcated structure is provided on the bottom surface of the cavity 1 , and the bifurcated structure corresponds to the positions of the plurality of liquid outlet holes 3 one by one.

[0038] In an embodiment of the present invention, the directional buckle 16 has a three-pronged fork structure, and the angle between the two prongs is 60 degrees, which is the same as the angle between the three liquid outlet holes 3 on each layer, and the position of the three prongs corresponds to the three columns of liquid outlet holes 3 in the vertical direction, which makes it convenient for the multi-stage injection device to determine the direction of the liquid outlet hole 3 during installation.

[0039] like Figure 5 As shown, the interior of the nozzle 6 is a stepped structure, and the sharp and blunt double-channel structure 9 is arranged on the side wall at the inlet of the nozzle 6. Multiple groups of sharp and blunt double-channel structures 9 are arranged side by side in a ring in the middle of the side wall.

[0040] In this embodiment of the present invention, the surfaces of the rectangular protrusions 7 and the rectangular recesses 8 are provided with isosceles triangular serrations, with the width of the serrations perpendicular to the direction of liquid flow. The tooth density of the serrations on the rectangular protrusions 7 is less than that of the serrations on the rectangular recesses 8. The tooth tip angles of the serrations on the rectangular protrusions 7 are obtuse, while the tooth tip angles of the serrations on the rectangular recesses 8 are acute.

[0041] With this arrangement, a sparse blunt structure is formed at the rectangular protrusions 7 , and a dense sharp structure is formed at the rectangular grooves 8 .

[0042] The dense sharp structures can increase the turbulence of the fluid, improve the mixing efficiency of the fluid or carry out specific chemical reactions, such as improving the mixing efficiency of different types of pesticides, or improving the reaction degree after the reaction of different types of pesticides is compounded.

[0043] The sparse passivation structure can reduce the turbulence of the fluid or stabilize the fluid flow state after pesticide mixing.

[0044] The sharp-blunt dual-channel structure 9, consisting of a dense distribution of sharp structures and sparse blunt structures, can both increase the turbulence of the fluid within the nozzle 6 and improve the mixing efficiency between the different fluid components, and reduce the turbulence of the fluid, stabilizing the fluid flow after mixing, helping to form a more uniform spray effect and improving the coverage and uniformity of the spray. It also disperses the impact of the fluid on the inner wall of the nozzle 6, reducing wear and extending the service life of the nozzle 6.

[0045] Furthermore, in another embodiment of the present invention, Figure 6 As shown, a T-shaped microchannel structure 10 is provided between the sharp-blunt dual-channel structure 9 and the inner wall of the nozzle 6 , and the wall thickness between the T-shaped microchannel structure 10 and the rectangular protrusion 7 and the rectangular groove 8 is equal.

[0046] The T-shaped microchannel structure 10 can further promote the mixing efficiency of different fluids within the nozzle 6. In a microfluidic system, fluid mixing within the T-shaped microchannel structure 10 is mainly achieved through molecular diffusion, and the T-shaped structure helps increase the contact area between the fluids, thereby improving the mixing efficiency. The T-shaped microchannel structure 10 can also control the formation of droplets. By adjusting the flow rates of the gas and liquid phases and the gas phase pressure, a stable bubble flow or stratified flow can be formed within the T-shaped microchannel structure 10. This is crucial for the generation and control of droplets, and thereby balances the fluid flow rate and reduces the uneven liquid spraying caused by partial inlet blockage.

[0047] In another embodiment of the present invention, Figure 5 As shown, the inner wall of the nozzle 6 perpendicular to the direction of liquid flow is provided with an array of water-repellent structures 11. The water-repellent structure 11 consists of a circular base 12 and an elliptical top 13 connected to the circular base 12. There is a smooth arc transition between the circular base 12 and the elliptical top 13, and two adjacent rows of water-repellent structures 11 are staggered in an array.

[0048] The array of water-repellent structures 11 forms a hydrophobic layer, helping to reduce friction between the fluid and the inner wall of nozzle 6, lowering the contact angle between the liquid and the solid surface, thereby reducing frictional resistance. The array of water-repellent structures 11 controls the wettability of the fluid on the inner wall of nozzle 6, helping to form a stable liquid film or droplets, which is crucial for precisely controlling spray characteristics. Furthermore, the array of water-repellent structures 11 reduces the adhesion of particles or impurities to the inner wall of nozzle 6, preventing clogging of nozzle 6. This is particularly useful for pesticides with specific wettability or viscosity, optimizing nozzle 6 performance through the hydrophobic properties of the array of water-repellent structures 11.

[0049] The surface of the water-repellent structure 11 can also be coated with a hydrophobic material coating to further enhance its hydrophobic properties. The dual design of structure and coating can not only enhance the water-repellent effect of the surface, but also optimize the overall fluid dynamics characteristics.

[0050] The multi-stage spraying device provided in the embodiment of the present invention should be applicable to irrigation equipment. By setting a card slot matching the directional buckle 16 on the equipment, the cavity 1 is fixed to the equipment through the directional buckle 16. The top of the cavity 1 is connected to the water or pesticide to be sprayed stored in the equipment through the liquid inlet pipe 2. The combination of the three-layer rotating body 4 is adjusted according to the height and density of the crops to achieve uniform and efficient spraying operations.

[0051] The above description is only a preferred embodiment of the present invention and is 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 in the scope of protection of the present invention.

Claims

1. A multi-stage injection device, characterized in that: include: A cavity, wherein a liquid inlet pipe is connected to the top of the cavity, and a plurality of liquid outlet holes are opened on the side of the cavity; A rotating body, wherein a plurality of the rotating bodies are rotatably sleeved on the cavity, and a mounting hole is provided on the side of the rotating body, and when the rotating body rotates, the mounting hole can be connected to the liquid outlet; A nozzle, the nozzle being detachably connected to the mounting hole, the inner side wall of the nozzle being provided with a plurality of sharp and blunt double-channel structures consisting of rectangular protrusions and rectangular grooves of equal length; The tooth end angle of the sawtooth structure formed on the surface of the rectangular protrusion is an obtuse angle, and the tooth end angle of the sawtooth structure formed on the surface of the rectangular groove is an acute angle; The width direction of the tooth surface of the sawtooth structure is perpendicular to the flow direction of the liquid.

2. The multi-stage injection device according to claim 1, characterized in that: The surfaces of the rectangular protrusion and the rectangular groove are provided with isosceles triangle sawtooth structures.

3. The multi-stage injection device according to claim 2, characterized in that: The tooth density of the sawtooth structure provided on the surface of the rectangular protrusion is smaller than the tooth density of the sawtooth structure provided on the surface of the rectangular groove.

4. The multi-stage injection device according to claim 2, characterized in that: A T-shaped microchannel structure is provided between the sharp and blunt dual-channel structure and the inner wall of the nozzle, and the wall thickness between the T-shaped microchannel structure and the rectangular protrusion and the rectangular groove is equal.

5. The multi-stage injection device according to claim 1, characterized in that: The inner wall of the nozzle perpendicular to the liquid flow direction is provided with an array of water-repellent structures, which are composed of a circular base and an elliptical top connected to the circular base, and the circular base and the elliptical top are smoothly transitioned in an arc shape.

6. The multi-stage injection device according to claim 5, characterized in that: The water-repellent structures in two adjacent rows are arranged in a staggered array.

7. The multi-stage injection device according to claim 1, characterized in that: The surface of the cavity between adjacent liquid outlet holes is provided with sealing edges.

8. The multi-stage injection device according to claim 7, characterized in that: A sealing ring is provided on the surface of the cavity between adjacent rotating bodies.

9. The multi-stage injection device according to claim 8, characterized in that: The bottom surface of the cavity is provided with a directional buckle having a bifurcated structure, and the bifurcated structure corresponds to the positions of the plurality of liquid outlet holes one by one.

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