A plant protection spray device

Abstract

The present invention belongs to the technical field of spraying devices, and provides a plant protection spraying device. The present invention preliminarily mixes liquid medicine through a mixing pipe, and then uses a mixing component to further mix the liquid medicine. The mixed liquid medicine is thrown out from the bottom of the mixing component into an outer cover shell, so as to accelerate the flow of the liquid medicine and effectively improve the uniformity of liquid medicine mixing. The mixed liquid medicine is finally sprayed out through an improved fan-shaped nozzle. The three-level stepped structure of the inner cavity of the fan-shaped nozzle can make the internal flow field more stable. The droplet pipeline structure has hydrophobic properties, which can reduce the adsorption of liquid medicine on the inner cavity surface, reduce the waste of liquid medicine, and make the sprayed liquid medicine ratio more accurate. A plurality of fish-scale pits can affect the local flow of liquid medicine on a microscopic scale, so that it has a tendency to change from turbulent flow to laminar flow, reduce turbulent kinetic energy, reduce the kinetic energy loss of liquid medicine, increase the speed of liquid medicine spraying at the nozzle, make the liquid medicine atomized finer, and improve the efficiency and effect of plant protection operations.

Description

Technical Field

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

[0002] In agricultural plant protection operations, spray nozzles are often used to spray liquid medicine to achieve the purpose of preventing and controlling pests and diseases. However, the inner wall of the nozzle often absorbs the liquid medicine, resulting in waste of liquid medicine and errors in the preparation of liquid medicine. In addition, since the liquid medicine contains different components and these components easily react with each other during use, uneven mixing, tiny impurities and particles are generated, and nozzle blockage often occurs. This blockage not only affects the efficiency of plant protection operations, but also may affect the degree of atomization of the liquid medicine by the nozzle, resulting in uneven spraying and affecting the growth effect of crops.

[0003] Therefore, it is necessary to propose a new type of plant protection spraying device that can effectively solve the problems of liquid waste, uneven mixing, blockage and insufficient atomization, ensure the smooth operation of the nozzle, and improve the efficiency and effectiveness of plant protection operations. Summary of the invention

[0004] The present invention provides a plant protection spraying device, aiming to solve the above technical problems.

[0005] The present invention is implemented as follows: a plant protection spray device includes an outer cover shell, a mixing liquid component and a fan-shaped nozzle, the bottom of the outer cover shell is detachably connected to a cover plate, the cover plate has a plurality of threaded holes, the mixing liquid component is arranged inside the outer cover shell, the fan-shaped nozzle is threadedly connected to the cover plate through the threaded holes, the fan-shaped nozzle is connected to the interior of the outer cover shell, the inner cavity of the fan-shaped nozzle has a three-level stepped structure with an inner diameter gradually decreasing toward the nozzle direction, and the inner surfaces of the first and third step structures are provided with a plurality of groups of droplet pipeline structures composed of arc-shaped protrusions and arc-shaped pits.

[0006] Furthermore, the inner surface of the stepped structure of the second stage is provided with a plurality of fish-scale-shaped pits in a triangular array, and the fish-scale-shaped pits have two mutually symmetrical concave arc-shaped inner walls and one convex arc-shaped inner wall.

[0007] Furthermore, the inner cavity of the nozzle has an arc-shaped structure of convergence-divergence-straightness-convergence toward the outside.

[0008] Furthermore, a top cover with a hole is detachably connected to the top of the outer cover shell, and the hole of the upper cover is threadedly connected to a two-phase mixed liquid pipe communicating with the interior of the outer cover shell through a connecting sleeve.

[0009] Furthermore, the liquid mixing component includes a liquid mixing chamber and a micro motor, the liquid mixing chamber is located below the liquid mixing tube, a motor chamber is provided on the inner side of the cover plate, the micro motor is connected in the motor chamber, a circular slide rail is connected to the top of the motor chamber, the bottom of the liquid mixing chamber is connected to a slider of the circular slide rail, the output shaft of the micro motor is driven and connected to the bottom of the liquid mixing chamber, and a plurality of centrifugal holes are provided on the side wall of the liquid mixing chamber near the bottom.

[0010] Furthermore, a perforated plate is connected to the top of the liquid mixing chamber, and a side wall of the perforated plate extends upward to form a groove, and a plurality of grinding balls are placed inside the liquid mixing chamber.

[0011] Furthermore, a stabilizing shaft is provided in the axial direction of the liquid mixing chamber, the bottom end of the stabilizing shaft is fixedly connected to the bottom of the liquid mixing chamber, and the top end of the stabilizing shaft is detachably connected to the center of the orifice plate.

[0012] Furthermore, the micro motor is bonded to the inner wall of the motor cavity by means of heat-conducting glue.

[0013] Furthermore, four threaded holes are provided, and the four threaded holes are arranged in an equidistant circular array on the cover plate, and a filter screen is detachably connected to the inner side of each threaded hole.

[0014] The plant protection spraying device provided by the present invention preliminarily mixes the liquid medicine through a liquid mixing pipe, and then uses a liquid mixing component to further mix the liquid medicine. The mixed liquid medicine is thrown out from the bottom of the liquid mixing component into the outer cover shell, thereby accelerating the flow of the liquid medicine and effectively improving the uniformity of the liquid medicine mixing. The mixed liquid medicine is finally sprayed out through an improved fan-shaped nozzle. The three-level stepped structure of the inner cavity of the fan-shaped nozzle can make the internal flow field more stable. The inner surfaces of the first and third level stepped structures have a droplet pipeline structure, which has hydrophobic properties and can reduce the adsorption of the liquid medicine on the inner cavity surface, reduce the waste of the liquid medicine, and make the sprayed liquid medicine ratio more accurate. The inner surface of the second level stepped structure has a plurality of fish scale-shaped pits, which can affect the local flow of the liquid medicine on a microscopic scale, so that it has a tendency to change from turbulent flow to laminar flow, reduce turbulent kinetic energy, reduce the kinetic energy loss of the liquid medicine, increase the speed of the liquid medicine sprayed at the nozzle, make the liquid medicine atomized finer, and improve the efficiency and effect of the plant protection operation. The present invention can also be used in conjunction with a pressure pump to adjust the pressure of the liquid medicine to meet the spraying requirements of different crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a plant protection spraying device provided by an embodiment of the present invention;

[0016] Figure 2 yes Figure 1 A front cross-sectional view of

[0017] Figure 3It is a partial front cross-sectional view of a fan-shaped nozzle;

[0018] Figure 4 is a schematic diagram of the droplet pipeline structure;

[0019] Figure 5 is a cross-sectional view of the droplet channel structure;

[0020] Figure 6 It is a three-dimensional perspective of fish-scale pits;

[0021] Figure 7 It is a front perspective view of the fish scale-like pits.

[0022] The numbers in the figure represent: 1-outer cover, 2-cover plate, 3-fan-shaped nozzle, 4-nozzle, 5-stepped structure, 6-arc-shaped protrusion, 7-arc-shaped pit, 8-fish-scale pit, 9-upper cover, 10-connecting sleeve, 11-mixing pipe, 12-mixing chamber, 13-micro motor, 14-motor chamber, 15-circular slide rail, 16-centrifugal hole, 17-orifice plate, 18-groove, 19-grinding ball, 20-stabilizing shaft, 21-filter. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 used to limit the present invention.

[0024] See also Figures 1 to 7 An embodiment of the present invention provides a plant protection spraying device, which includes an outer cover shell 1, a liquid mixing component and a fan-shaped spray head 3.

[0025] The liquid medicine is added to the liquid mixing component for processing. The liquid medicine is fully mixed by the liquid mixing component to refine tiny impurities and particles. The liquid medicine processed by the liquid mixing component enters the outer cover shell 1 and is finally sprayed out from the fan-shaped nozzle 3 in atomized form.

[0026] The bottom of the outer casing 1 is detachably connected with a cover plate 2, and the cover plate 2 is provided with a plurality of threaded holes.

[0027] In an embodiment of the present invention, the outer cover shell 1 is a combination of a straight cylindrical structure and a truncated cone structure, the upper part is a straight cylindrical structure, and the lower part is a truncated cone structure. The cover plate 2 is detachably connected to the bottom surface of the truncated cone structure, and the detachable connection method can be a snap-on connection, a threaded connection, etc.

[0028] The top of the outer casing 1 is detachably connected with an upper cover 9 with a hole, and the hole of the upper cover 9 is threadedly connected with a two-phase mixed liquid pipe 11 communicating with the interior of the outer casing 1 through a connecting sleeve 10 .

[0029] Two different types or proportions of liquid medicine are added into the outer housing 1 through the two-phase mixing tube 11, and are preliminarily mixed inside the mixing tube 11. When more types of liquid medicine need to be mixed, the mixing tube 11 can also be a three-phase or more mixing tube. When replacing, the mixing tube 11 can be rotated to separate it from the connecting sleeve 10.

[0030] The liquid mixing component is arranged inside the outer cover shell 1 , and the fan-shaped spray head 3 is threadedly connected to the cover plate 2 through a threaded hole, so that the fan-shaped spray head 3 is communicated with the inside of the outer cover shell 1 .

[0031] In the embodiment of the present invention, the liquid mixing component includes a liquid mixing chamber 12 and a micro motor 13. The liquid mixing chamber 12 is located below the liquid mixing tube 11. A motor chamber 14 is provided on the inner side of the cover plate 2. The micro motor 13 is connected in the motor chamber 14. A circular slide rail 15 is connected to the top of the motor chamber 14. The bottom of the liquid mixing chamber 12 is detachably connected to a slider of the circular slide rail. The output shaft of the micro motor 13 is detachably driven to be connected to the bottom of the liquid mixing chamber 12. A plurality of centrifugal holes 16 are provided on the side wall of the liquid mixing chamber 12 near the bottom.

[0032] The liquid medicine is added into the liquid mixing chamber 12 through the liquid mixing pipe 11. The liquid mixing chamber 12 can slide and rotate on the circular slide rail 15 under the drive of the micro motor 13, so as to further mix the liquid medicine.

[0033] In addition, in order to refine the tiny impurities and particles in the mixed liquid, a perforated plate 17 is connected to the top of the mixing chamber 12, and the side wall of the perforated plate 17 extends upward to form a groove 18. A plurality of grinding balls 19 are placed inside the mixing chamber 12.

[0034] The liquid medicine enters the liquid mixing chamber 12 through the orifice plate 17 , and the groove 18 can block the splashing liquid medicine and limit it within the range of the orifice plate 17 . The orifice plate 17 is also used to limit the movement range of the grinding ball 19 .

[0035] When the mixing chamber 12 rotates, the grinding balls 19 move inside the mixing chamber 12, impacting, squeezing and shearing the tiny impurities and particles in the liquid medicine, thereby refining them to prevent them from clogging the fan-shaped nozzle 3. The movement of the grinding balls 19 can also promote the uniformity of mixing between the liquid medicines.

[0036] The liquid medicine in the mixing process is thrown out from the centrifugal holes 16 on the bottom side wall of the liquid mixing chamber 12 , and the thrown out liquid medicine hits the inner wall of the outer cover shell 1 and then flows downward into the interior of the truncated cone structure part of the outer cover shell 1 .

[0037] The motor cavity 14 is located inside the truncated cone structure. The motor cavity 14 is a sealed structure. The output shaft of the micro motor 13 is sleeved with a dynamic seal. When the liquid medicine flows through the motor cavity 14, the micro motor 13 can be cooled. At the same time, in order to ensure the cooling effect, the micro motor 13 is bonded to the inner wall of the motor cavity 14 by a heat conductive adhesive to improve the heat transfer efficiency between the micro motor 13 and the side wall of the motor cavity 14.

[0038] The micro motor 13 can be powered by an external power source while ensuring the sealing of the motor cavity 14 , or by a rechargeable battery additionally arranged in the motor cavity 14 .

[0039] In the embodiment of the present invention, four threaded holes are provided on the cover plate 2 , and the four threaded holes are arranged in an equidistant circular array on the cover plate 2 . A filter screen 21 is detachably connected to the inner side of each threaded hole.

[0040] The cover plate 2 is threadedly connected to four fan-shaped nozzles 3 through four threaded holes to ensure the range and density of the liquid medicine spraying. The filter screen 21 can perform a final filtration on the liquid medicine to ensure that there is no solid matter in the liquid medicine flowing to the nozzle 4 that may clog the nozzle 4. When the filter screen 21 needs to be replaced, the cover plate 2 can be removed to remove the filter screen 21.

[0041] A stabilizing shaft 20 is disposed in the axial direction of the liquid mixing chamber 12 . The bottom end of the stabilizing shaft 20 is fixedly connected to the bottom of the liquid mixing chamber 12 , and the top end of the stabilizing shaft 20 is detachably connected to the center of the orifice plate 17 .

[0042] The orifice plate 17 is connected to the top of the mixing chamber 12 by means of a snap connection or a threaded connection. There is a pit in the center of the orifice plate 17, and the top of the stabilizing shaft 20 is snapped or plugged into the pit. During the rotation of the mixing chamber 12, the stabilizing shaft 20 can make the rotation movement of the mixing chamber 12 more stable and avoid shaking.

[0043] like Figure 3 As shown, the inner cavity of the fan-shaped nozzle 3 has a three-level stepped structure 5 with a gradually decreasing inner diameter toward the nozzle 4, and the inner surfaces of the first and third stepped structures 5 are provided with multiple groups of droplet channel structures composed of arc-shaped protrusions 6 and arc-shaped pits 7.

[0044] When the liquid medicine passes through the three-stage stepped structure 5, the flow field pressure inside the three-stage stepped structure 5 gradually decreases, and the flow rate of the liquid medicine gradually increases, thereby ensuring the stability of the internal flow field.

[0045] like Figure 4 , 5As shown, the micro-droplet pipeline structure composed of the arc-shaped protrusions 6 and the arc-shaped pits 7 has hydrophobic properties, which can reduce the surface tension and adsorption force of the liquid medicine to reduce the adsorption of the liquid medicine on the inner wall of the fan-shaped nozzle 3, reduce the waste of liquid medicine, and help to accurately control the proportion of liquid medicine. In addition, the arc-shaped protrusions 6 and the arc-shaped pits 7 in the micro-droplet pipeline structure can also change the friction characteristics of the liquid medicine on the inner surface of the stepped structure 5. The existence of these microstructures can reduce the speed difference between the local fluid layers, thereby reducing the formation of turbulence. The micro-droplet pipeline structure can affect the local flow of the fluid on a microscopic scale, promote the gradual transformation of turbulence into laminar flow, reduce turbulent kinetic energy, reduce the kinetic energy loss of the liquid medicine, and increase the speed of the liquid medicine sprayed at the nozzle 4.

[0046] like Figure 6 , 7 As shown, the inner surface of the second-level stepped structure 5 is provided with a plurality of fish-scale-shaped pits 8 in a triangular array, and the fish-scale-shaped pits 8 have two mutually symmetrical concave arc-shaped inner walls and one convex arc-shaped inner wall.

[0047] As the medicine liquid enters the three-stage stepped structure 5 in the fan-shaped nozzle 3, the turbulent kinetic energy of the medicine liquid also increases accordingly. However, the change in turbulent kinetic energy at the outlet of the nozzle 4 is the opposite. The larger the cutting angle of the fan-shaped nozzle 3, the smaller the turbulent kinetic energy at the outlet. The angle of the cutting groove changes the size of the outlet opening. The smaller the opening, the greater the resistance, which increases the turbulent kinetic energy at the outlet. The speed of the medicine liquid when it reaches the outlet will also decrease accordingly. The size of the opening also affects the acceleration of the medicine liquid in the outlet section. The half angle of the cutting groove affects the flow state of the medicine liquid inside the nozzle 4.

[0048] The multiple fish-scale pits 8 of the triangular array are arranged in a dense-first-then-sparse manner, and are arranged in order on the inner surface of the second-level stepped structure 5. The microstructure of the fish-scale pits 8 can guide the fluid to flow in a more orderly manner. This structure can blur the velocity gradient of the fluid and help reduce the generation of turbulence. The fish-scale pits 8 can reduce the formation of turbulence by reducing the wall friction through the surface texture structure, making it have a tendency to transform from turbulence to laminar flow, reducing turbulent kinetic energy, reducing the kinetic energy loss of the liquid medicine, and increasing the speed of the liquid medicine at the outlet section, so that it is atomized finer.

[0049] In addition, in the embodiment of the present invention, the inner cavity of the nozzle 4 has an arc-shaped structure of convergence-divergence-straightness-convergence toward the outside.

[0050] The nozzle 4 in the embodiment of the present invention is provided with a characteristic streamlined structure to achieve specific flow characteristics. While ensuring the uniformity and streamline of the liquid medicine in the flow direction, a convergent-divergent-straight-convergent arc-shaped structure inner cavity is provided for the nozzle 4. The liquid medicine enters the fan-shaped nozzle 3 under pressure, flows through the nozzle 4, and is squeezed by the groove wedge surface of the nozzle 4 to extend into a planar liquid film. Under the action of the pressure difference between the inside and outside of the nozzle 4, the liquid film diffuses and becomes thinner, and then is torn into filaments, and then differentiated into fine droplets, and finally uniformly atomized onto the target vegetation. This characteristic streamlined structure can make the flow field inside the nozzle 4 more uniform, reduce the wear of the nozzle 4, extend the service life of the nozzle 4, and increase the speed value of the liquid medicine passing through the nozzle 4, which is conducive to improving the atomization effect.

[0051] In summary, when the plant protection spray device provided by the embodiment of the present invention is used, it is fixed above the plants that need to be sprayed with liquid medicine, connected to the liquid medicine storage tank via the mixing tube 11, the liquid medicine is injected into the mixing chamber 12 through the mixing tube 11, and the micro motor 13 is started. The micro motor 13 drives the mixing chamber 12 to rotate, and the liquid medicine rotates and mixes in the mixing chamber 12. The grinding balls 19 inside the mixing chamber 12 continuously assist in stirring the liquid medicine, thereby refining the tiny impurities and particulate matter that may be generated during the mixing process of the liquid medicine, and improving the mixing uniformity. The evenly mixed liquid medicine is thrown out from the centrifugal hole 16 at the bottom of the mixing chamber 12, and then hits the outer cover shell 1 and falls into the truncated cone structure at the bottom of the outer cover shell 1. Under the centrifugal action of the mixing chamber 12, the mixed liquid medicine is sprayed out from the nozzle 4. During the spraying of the liquid medicine, the hydrophobic effect of the droplet pipeline structure on the inner surface of the first and third stepped structures 5 inside the fan-shaped nozzle 3 prevents the liquid medicine from being adsorbed on the inner surface of the first and third stepped structures 5, reducing the waste of liquid medicine and making the proportion of the sprayed liquid medicine more accurate. The filter 21 can further filter the solid matter in the liquid medicine. The fish scale-shaped pits on the inner surface of the second stepped structure 5 and the characteristic streamlined structure of the nozzle 4 can accelerate the flow of the liquid medicine after passing through the filter 21, thereby improving the atomization effect of the liquid medicine.

[0052] 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 protection scope of the present invention.

Claims

1. A plant protection spraying device, characterized in that: include: An outer cover shell, wherein a cover plate is detachably connected to the bottom of the outer cover shell, and the cover plate is provided with a plurality of threaded holes; A liquid mixing component, the liquid mixing component is arranged inside the outer housing; A fan-shaped spray nozzle, the fan-shaped spray nozzle is threadedly connected to the cover plate through the threaded hole, and the fan-shaped spray nozzle is communicated with the interior of the outer cover shell; The inner cavity of the fan-shaped nozzle has a three-level stepped structure with a gradually decreasing inner diameter toward the nozzle direction, and the inner surfaces of the first and third level stepped structures are provided with multiple groups of droplet pipeline structures composed of arc-shaped protrusions and arc-shaped pits; The inner surface of the stepped structure of the second stage is provided with a plurality of fish-scale-shaped pits in a triangular array, and the fish-scale-shaped pits have two mutually symmetrical concave arc-shaped inner walls and one convex arc-shaped inner wall; The top of the outer housing shell is detachably connected to an upper cover with an opening, and the hole of the upper cover is threadedly connected to a mixing liquid pipe communicating with the interior of the outer housing shell through a connecting sleeve; The liquid mixing component includes a liquid mixing chamber and a micro motor, wherein the liquid mixing chamber is located below the liquid mixing tube, a motor chamber is provided on the inner side of the cover plate, the micro motor is connected in the motor chamber, a circular slide rail is connected to the top of the motor chamber, the bottom of the liquid mixing chamber is connected to a slider of the circular slide rail, the output shaft of the micro motor is driven and connected to the bottom of the liquid mixing chamber, and a plurality of centrifugal holes are provided on the side wall of the liquid mixing chamber near the bottom.

2. The plant protection spraying device according to claim 1, characterized in that: The inner cavity of the nozzle has an arc structure of convergence-divergence-straightness-convergence outwards.

3. The plant protection spraying device according to claim 1, characterized in that: The top of the liquid mixing chamber is connected with a perforated plate, the side wall of the perforated plate extends upward to form a groove, and a plurality of grinding balls are placed inside the liquid mixing chamber.

4. The plant protection spraying device according to claim 3, characterized in that: A stabilizing shaft is arranged in the axial direction of the liquid mixing chamber, the bottom end of the stabilizing shaft is fixedly connected to the bottom of the liquid mixing chamber, and the top end of the stabilizing shaft is detachably connected to the center of the orifice plate.

5. The plant protection spraying device according to claim 1, characterized in that: The micro motor is bonded to the inner wall of the motor cavity by means of heat-conducting adhesive.

6. The plant protection spraying device according to claim 1, characterized in that: There are four threaded holes, which are arranged in an equidistant circular array on the cover plate, and a filter screen is detachably connected to the inner side of each threaded hole.

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