CN211190631U - Plant protection fan-shaped spraying device based on impinging stream theory - Google Patents

Abstract

The utility model discloses a fan-shaped atomizer of plant protection based on striking flows theory belongs to plant protection shower nozzle technical field. The utility model discloses a fan-shaped atomizer of plant protection, including shower nozzle, connecting pipe, spray tube and air-vent valve, the shower nozzle passes through the connecting pipe and connects the spray tube, and on the spray tube was located to the air-vent valve, the shower nozzle included shower nozzle base and two sets of nozzle assembly, and two sets of nozzle assembly were close to mutually and install on the shower nozzle base with certain contained angle, and two sets of nozzle assembly spout the relative setting of core nozzle mouth with certain contained angle, and the crossing plane that forms of the injection axis of two sets of nozzle assembly is perpendicular with two nozzle mouth opening directions that spout the core. The utility model discloses a fan-shaped atomizer of plant protection, have the characteristics that the fog drop spectrum is narrower and particle diameter uniformity is better, and the fog drop particle diameter presents in the fan-shaped face of spraying that the centre is great and even both sides are slightly little, can improve the inhomogeneity of spray lance type sprayer fog drop particle diameter distribution; and has better float resistance and penetration ability.

Description

Plant protection fan-shaped spraying device based on impinging stream theory

Technical Field

The utility model relates to a fan-shaped atomizer for plant protection field, more specifically say, relate to a fan-shaped atomizer of plant protection based on striking flows theory.

Background

The agricultural and forestry production usually uses biological control effect and physical index to measure the quality effect of liquid medicine spraying. The biological control effect refers to the control degree (such as pest lethality) of pests and diseases which can be achieved after the pesticide is sprayed, and the physical indexes are mainly expressed in the aspect of droplet size parameters. The Biological optimal particle Size theory (BODS) considers that the Size ranges of the fog drops captured by different Biological targets are different, the deposition amounts of the fog drops with different sizes on different organisms are also different, a certain relationship exists between the two, the number of the fog drops captured by the targets can be the largest only within the optimal particle Size range, and the optimal control effect is obtained. In plant protection machinery, the size parameter of the mist droplets is one of the most important indexes for determining the performance of the plant protection machinery, and with the continuous and deep understanding of the influence of the size of the mist droplets on the spraying performance and the great concern of the influence of the drift of the mist droplets on the environment, the technical research on how to control the size (or the range of the mist droplet spectrum) of the mist droplets and the uniformity of the particle size of the mist droplets is more and more emphasized.

The traditional fan-shaped spray head forms jet flow, liquid flow is formed by means of relative speed between liquid medicine and air to be broken, linear liquid drops are obtained, the defects of wide fog drop spectrum, poor particle size uniformity and the like exist in spraying operation (particularly in orchard spraying), the particle sizes of fog drops at different positions in the spraying fan-shaped surface of the fan-shaped spray head are different, the situation that the particle size of middle fog drops which are close to U-shaped distribution is small and the particle sizes of fog drops at two sides are larger is presented, the fog drops in the overlapping area of the fan-shaped edges of two adjacent spray heads of the spray rod type spraying machine are much larger than the fog drops in the central area of the fan-shaped surface which is not overlapped, the particle size distribution of the fog drops after the spraying fan-shaped surfaces of the spray rods are overlapped is uneven, and the deposition behavior and the prevention and control effect of the.

The basic structure and principle of impinging stream theory is shown in fig. 1, which is a relatively novel technical research method, and has been one of the key points of chemical engineering research in recent years, and has a series of excellent characteristics of enhancing interphase transfer, promoting micromixing and pressure fluctuation, etc. since two jet stream impingement can homogenize the particle size of the droplet clusters to a certain extent, a narrow droplet size distribution is obtained, the stronger the impingement the better the droplet size homogenization, which is also called water stream impingement in a collision-type spray method, for example, the "fluid atomization method by fluid stream impingement" described in chinese patent No. Z L200680017160.0 proposes that a pressurized fluid is directed through one or more outlets, each having an orientation such that fluid discharged from one or more outlets impinges at a distance from one or more outlets, providing atomization of the fluid.

Although the impinging stream theory has been applied to fluid atomization, since plant protection spraying has requirements of large coverage of working area, high spraying height and the like, there are many technical difficulties to be overcome in applying the impinging stream theory to control the size of liquid medicine droplets and improve the uniformity of droplet size in a plant protection spraying device. The application of the impinging stream theory in the field of plant protection spraying has not been documented yet.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The utility model aims to overcome the defects that the existing plant protection spraying device has wider fog drop spectrum and poorer particle size uniformity, which leads to the deposition behavior and the prevention effect of the fog drops in different areas on a target, and the technical scheme of the utility model is adopted, two fan-shaped jet flows are realized in a spray head or an atomizing device, the two fan-shaped jet flows oppositely and at high speed at a certain included angle near the liquid outlet of the terminal of the spray head and collide with the discrete lumps with different shapes to form fan-shaped spraying with uniform fog drop particle size, the distribution of the fog drops is more concentrated through testing, the transverse deposition distribution is close to or reaches the saddle-shaped distribution shape, the plant protection fan-shaped spraying device has the characteristics of narrower fog drop spectrum and better particle size uniformity, and the fog drop particle size in the spraying fan-shaped surface presents the characteristics of larger middle and smaller uniform two sides, smaller fog drops in the overlapped area of the edges of two adjacent spraying fan-shaped areas can be combined or converged into larger fog drops, so that the diameter of the fog drops approaches or reaches the diameter of the fog drops in the middle area, and the nonuniformity of the grain size distribution of the fog drops of the spray rod type spraying machine can be improved; in addition, compared with the existing single-hole fan-shaped spray head, the fan-shaped spraying device based on the impinging stream theory has the advantages that the droplet size is larger, certain speed is realized, and the floating resistance and the penetration capacity are better.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a fan-shaped atomizer of plant protection based on impinging stream theory, including shower nozzle, connecting pipe, spray tube and air-vent valve, the shower nozzle pass through the connecting pipe and connect the spray tube, the air-vent valve locate on the spray tube, the shower nozzle include shower nozzle base and two sets of nozzle assembly, two sets of nozzle assembly are close to and install on the shower nozzle base with certain contained angle mutually, nozzle assembly include spout core, sealed pad, micro-control valve body and micro-control valve, spout the core location install in the mounting hole of shower nozzle base or integrated into one piece on the shower nozzle base, the micro-control valve body install on the shower nozzle base to and spout through sealed pad sealed cooperation between the core, micro-control valve install on the micro-control valve body; the micro-control valve bodies of the two groups of nozzle assemblies are respectively connected with the spray pipe through connecting pipes, the nozzle openings of the spray cores of the two groups of nozzle assemblies are oppositely arranged at a certain included angle, and the plane formed by the intersection of the spray axes of the two groups of nozzle assemblies is vertical to the opening directions of the nozzle openings of the two spray cores.

Furthermore, the jet included angle of the nozzle openings of the core spraying nozzles of the two groups of nozzle assemblies is 25-45 degrees.

Furthermore, the jet included angle of the nozzle openings of the core spraying nozzles of the two groups of nozzle assemblies is 30-40 degrees.

Furthermore, the nozzle base on be equipped with two mounting holes, spout the core location and install in the mounting hole of nozzle base, all be equipped with the installation benchmark in two mounting holes, the outside of spouting the core be equipped with the cooperation reference surface, spout the core through the cooperation reference surface with the installation benchmark location cooperation installation in the mounting hole.

Furthermore, the top of the nozzle base is provided with two inclined planes with a certain included angle, and the mounting hole is arranged on the inclined planes.

Furthermore, the bottom of the spray head base is also provided with two notch angles corresponding to the nozzle openings of the corresponding side spray cores.

Furthermore, the micro-regulating valve comprises a valve core rod, a fine thread external thread and a limiting reference, wherein the fine thread external thread is arranged at one end of the valve core rod and is used for being in threaded connection with a valve hole on the side wall of the micro-control valve body, the limiting reference is arranged at the outer side end of the fine thread external thread and is also provided with a regulating button outside the limiting reference, and a regulating valve sealing ring is also arranged between the limiting reference and the valve hole on the side wall of the micro-control valve body.

Furthermore, the connecting pipe and the spray pipe and the connecting pipe and the micro-control valve body are connected by clamps.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following apparent effect:

(1) compared with the existing fan-shaped spray head, the plant protection fan-shaped spray device based on the impinging stream theory realizes two fan-shaped jets in one spray head or an atomization device, the two fan-shaped jets flow oppositely at a high speed and collide at a certain included angle near a liquid outlet at the terminal of the spray head, and the two fan-shaped jets collide with each other at the collision surface to break into discrete lumps with different shapes so as to form fan-shaped spray with uniform droplet particle size; tests show that the fog drops are distributed in a concentrated manner, the transverse deposition distribution is close to or reaches a saddle-shaped distribution form, the fog drops have the characteristics of narrow fog drop spectrum and good particle size uniformity, the fog drop particle size in the spraying fan-shaped surface has the characteristics of large middle and small uniform two sides, so that the small fog drops in the overlapped area of the edges of two adjacent spraying fan-shaped surfaces can be combined or aggregated into large fog drops, the large fog drops are close to or reach the diameter of the fog drops in the middle area, and the non-uniformity of the particle size distribution of the fog drops of the spray rod type spraying machine can be improved; in addition, compared with the existing single-hole fan-shaped spray head, the fan-shaped spray droplets based on the impinging stream theory have larger particle size and certain speed, and have better anti-floating performance and penetration capability;

(2) the utility model discloses a fan-shaped atomizer of plant protection based on impinging stream theory, the efflux contained angle of its two sets of nozzle assembly spout core nozzle mouth is 25 ~ 45, preferably 30 ~ 40, have better droplet particle diameter uniformity and droplet quality better, droplet particle diameter is better in the even uniformity in whole spraying field (for example in the high 300 ~ 500mm within range of work area) when being close 30, the high droplet particle diameter of different positions has more obvious change when being close 40, be favorable to carrying out accurate control to the droplet particle diameter in certain height in spraying field;

(3) the utility model discloses a plant protection fan-shaped spraying device based on impinging stream theory, which comprises a spray head, a connecting pipe, a spray pipe and a pressure regulating valve, wherein the spray head comprises a spray head base and two groups of nozzle assemblies which are arranged on the spray head base at a certain included angle, and spray cores of the nozzle assemblies are positioned and arranged in mounting holes of the spray head base or are integrally formed on the spray head base; the assembly structure is adopted, so that the universality and the replaceability of parts are facilitated, and different environmental requirements are met; the spray core integrated structure is adopted, so that the assembly error is reduced, and the spray core integrated structure is suitable for the condition with higher requirement on the spray accuracy; meanwhile, the nozzle assembly is provided with an independent micro-regulating valve, so that the spraying pressure of the two jet flows can be controlled and regulated within a certain range, and the particle size of the fog drops can be controlled more accurately;

(4) the utility model discloses a plant protection fan-shaped atomizer based on impinging stream theory, be equipped with two mounting holes on its shower nozzle base, spout the core location and install in the mounting hole of shower nozzle base, all be equipped with the installation benchmark in two mounting holes, the outside of spouting the core is equipped with the cooperation reference surface, spouts the core and fixes a position the cooperation installation through the installation benchmark in cooperation reference surface and the mounting hole, the assembly precision of shower nozzle is higher, has guaranteed the accurate nature requirement of plant protection fan-shaped spraying;

(5) the utility model discloses a plant protection fan-shaped atomizer based on impinging stream theory, the bottom of its shower nozzle base still is equipped with two and spouts the corresponding grooving angles of the nozzle mouth of core with corresponding side, does benefit to the formation and the striking of two strands of fan-shaped efflux more, has guaranteed that the spraying sector has wider coverage; in addition, the top of the spray head base is provided with two inclined planes with a certain included angle, and the mounting holes are formed in the inclined planes, so that the mounting holes can be conveniently machined, and the assembly precision of the two groups of nozzle assemblies can be guaranteed.

Drawings

FIG. 1 is a basic structure and schematic diagram of impinging stream theory;

fig. 2 is a schematic view of the impact principle of a plant protection fan-shaped spraying device based on the impinging stream theory according to the present invention;

FIG. 3 is a schematic view of the impact principle in direction A of FIG. 2;

FIG. 4 is a schematic diagram of the two fan-shaped jets impinging on the split atomization process;

FIG. 5 is a schematic view of a two-stream fan-shaped jet impact splitting atomization model in the present invention;

fig. 6 is a schematic structural diagram of a plant protection fan-shaped spraying device based on impinging stream theory according to the present invention;

fig. 7 is a schematic view of a split structure of a nozzle in a plant protection fan-shaped spraying device based on impinging stream theory according to the present invention;

fig. 8 is a schematic structural diagram of a nozzle base in a plant protection fan-shaped spraying device based on impinging stream theory according to the present invention;

fig. 9 is a schematic structural diagram of a spray core in a plant protection fan-shaped spray device based on impinging stream theory according to the present invention;

fig. 10 is a schematic structural diagram of a micro-regulating valve in a plant protection fan-shaped spraying device based on an impinging stream theory according to the present invention.

The reference numerals in the schematic drawings illustrate:

1. a spray head; 1-1, a nozzle base; 1-1-1, mounting reference; 1-1-2, internal threads; 1-1-3, cutting groove angles; 1-2, spraying a core; 1-2-1, matching with a reference surface; 1-2-2, a nozzle opening; 1-3, sealing gaskets; 1-4, a micro control valve body; 1-5, micro-regulating valve; 1-5-1, valve core rod; 1-5-2 of fine external thread; 1-5-3, a limit reference; 1-6, adjusting valve sealing ring; 2. a connecting pipe; 3. Clamping a hoop; 4. a nozzle; 5. a pressure regulating valve.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings.

The traditional fan-shaped spray head forms jet flow, and the jet flow is broken by the relative speed between liquid medicine and air, so that linear liquid drops are obtained. According to the principle that liquid drops keep a balanced state, the diameter of the liquid drops can be reduced by increasing the pressure (spraying pressure or external pressure), and the diameter of a liquid outlet of a spray hole at the terminal of the spray head can be reduced to form a linear jet flow by spraying liquid medicine. Because the inner aperture of the spray head (or the spraying device) generally gradually decreases in a step shape, the structure enables the liquid flowing out from the liquid outlet of the spray hole at the terminal of the spray head to form high-speed jet flow. Referring to fig. 4, the liquid medicine sprayed from the conventional fan-shaped nozzle often undergoes the following three changes in air, namely, jetting, splitting and atomization:

1) in the jet area, after the liquid flow is sprayed out through a liquid outlet (hole and slit) of a spray hole at the terminal of the nozzle, the liquid flow can be disturbed by air in a short distance (short time) and changed into a very thin liquid layer, and the liquid in the area (called the jet area) is called an undisturbed liquid core;

2) in the splitting area, the liquid layer can continue to develop (move) under the action of inertia force, and the disturbance generated at the gas-liquid interface and the external force can be transversely cut off to generate splitting, which is the splitting process of the jet liquid (called as the splitting area);

3) in the atomization zone, the liquid which is generated and is split continues to develop (move), and can be further broken into fine liquid drops under the action of external force shearing, and the process is the process of forming fog drops by spray jet (called atomization zone). Under the action of inertia force, the liquid drops in the atomizing area can continue to move linearly, the track of the linear liquid drops in fluid dynamics is called as a streamline, and the linear liquid drops have the characteristics that the shape of the streamline is not changed along with time, and the streamline cannot be crossed or bent.

The liquid drop particle size distribution of the spray jet formed by the liquid medicine sprayed by the fan-shaped spray head is in a U-shaped distribution form that the middle liquid drop particle size is small and the two side liquid drops particle size is larger, the liquid drop distribution form has a wider liquid drop spectrum range, when two adjacent spray fan-shaped edges are overlapped, the liquid drop particle size of an overlapped area is larger, the liquid drop distribution uniformity is poor, and the deposition behavior and the prevention and control effect of the liquid drops on the target at each point in the same height horizontal direction are greatly different.

Combine fig. 2 to fig. 5 to show, the utility model discloses a fan-shaped atomizer of plant protection based on impinging stream theory, in principle, realize two strands of fan-shaped efflux in a shower nozzle or atomizing device, two strands of fan-shaped efflux flow and striking with certain contained angle in opposite directions high speed near shower nozzle terminal liquid outlet, and the plane that the crossing formation of two strands of fan-shaped efflux's injection axis is mutually perpendicular with two strands of fan-shaped fluidic sector faces, two strands of fan-shaped efflux break the discrete form lump that the figure is different and form the even sector-shaped spraying of droplet particle size at the striking face collision each other. The working principle is as follows: two strands of fully accelerated fan-shaped water flows are impacted at a liquid outlet at the terminal of the spray head at a certain included angle, liquid medicine is injected into air from the liquid outlet at the terminal of the spray nozzle at a high speed, and strong interaction occurs between liquid during impact due to the fact that the two strands of water flows are close to an impact center, jet impact causes high momentum transfer, liquid molecules are in a condensed state of tight aggregation, and liquid clusters or liquid drops are reduced in size due to the fact that the jet impact has the effects of mutual collision, shearing, extrusion and the like between liquid clusters or molecules; under the interaction of various internal and external forces, the liquid column can be broken into discrete lumps with different shapes, and the two fan-shaped jet flows can form a spray fan-shaped surface similar to the fan-shaped spray head to be sprayed to a target after being impacted.

As shown in fig. 4, the utility model discloses a fan-shaped atomizer of plant protection based on impinging stream theory, two strands of fan-shaped efflux striking atomizes and has efflux district, splitting district and the three change process in atomizing district equally:

1) in the jet flow area, because jet flow impact atomization of the hedging nozzle is realized through one nozzle or an atomization device, two jet flows oppositely flow at high speed and impact at a certain included angle near a liquid outlet of a nozzle terminal spray hole, two fan-shaped jet flows are disturbed by air in a short distance near the liquid outlet of the nozzle terminal to be changed into a very thin liquid layer, the jet flow area is formed in a position where the two fan-shaped jet flows leave the liquid outlet to a certain distance from a jet flow impact center, and the two fan-shaped jet flows do not impact in the jet flow area;

2) in the splitting area, the liquid layers of the two fan-shaped jet flows are transversely cut off under the action of inertia force, disturbance generated by a gas-liquid interface and external force to split, and first atomization, namely disturbance atomization, is formed; meanwhile, liquid layers of two fan-shaped jet flows impact each other in a splitting area, high momentum transfer is caused by jet flow impact, liquid molecules are in a tightly gathered condensation state, strong interaction occurs between the liquid during impact, and the liquid flow groups and the molecules have the effects of mutual collision, shearing, extrusion and the like, so that the size of the liquid groups (or liquid drops) is rapidly reduced, the impact can break large liquid drops generated by disturbance atomization, the small liquid drops are combined with each other or gathered into larger liquid drops, uniform liquid drops which tend to be consistent are formed in the impact area on the whole, secondary atomization is formed, namely impact atomization is realized, and in the process of impact atomization, the larger the jet pressure is, the stronger the impact is, and the flow groups or liquid drops have more obvious homogenization effect; in addition, strong micromixing and pressure fluctuation are generated in an impact area due to strong momentum transfer and interaction of two fan-shaped jet flows, and meanwhile, air driven by the jet flows is also vibrated during impact, which means that fluid clusters or molecules are vibrated, so that part of energy is converted into vibration energy, and liquid drops in a splitting area are further atomized for the third time, namely, are atomized in a vibration mode, and liquid drops with uniform splitting sizes are formed; in the splitting area, three atomization processes of disturbance atomization, impact atomization and oscillation atomization are respectively carried out, the impact atomization can enable liquid drops with different sizes generated by the disturbance atomization to form uniform liquid drops, and oscillation atomization is formed by utilizing the impact effect, so that the uniform liquid drops are further atomized, and the formation of good uniform liquid drop particle sizes in a subsequent atomization area is greatly influenced;

3) in the atomizing area, the uniform liquid drops which tend to be consistent continue to move linearly, and are further split and broken into fine and uniform liquid drops under the interaction of various forces such as aerodynamic force, inertial force, viscous force, surface tension and the like to form a spray fan-shaped surface; the movement locus of the spray sector forms a certain included angle with the direction of the spray axis, when the included angle is larger than a certain angle, the running distance of liquid drops on two sides of the spray sector is increased, and meanwhile, the size of the liquid drops is reduced under the action of various forces (gravity, air resistance and the like), so that the size of the liquid drops on two sides of the spray sector is smaller, the combination or the aggregation of smaller liquid drops in the overlapped area of the edges of two adjacent spray sectors into larger liquid drops is facilitated, the diameter of the liquid drops is close to or reaches the diameter of the liquid drops in the middle area, and the problem of non-uniformity of the particle size distribution of the liquid drops of the spray rod type spraying.

The present invention will be further described with reference to the following examples.

Example 1

As shown in fig. 6 to 10, the plant protection fan-shaped spraying device based on the impinging stream theory according to the present embodiment includes a spraying head 1, a connecting pipe 2, a spraying pipe 4, and a pressure regulating valve 5, wherein the spraying head 1 is connected to the spraying pipe 4 through the connecting pipe 2, the pressure regulating valve 5 is provided on the spraying pipe 4, the pressure regulating valve 5 is used for controlling the spraying pressure, and the liquid medicine or the fluid is respectively supplied to the spraying head 1 through the spraying pipe 4 and then through the connecting pipe 2. The spray head 1 comprises a spray head base 1-1 and two groups of spray nozzle assemblies, wherein the two groups of spray nozzle assemblies are close to each other and are arranged on the spray head base 1-1 at a certain included angle, each spray nozzle assembly comprises a spray core 1-2, a sealing gasket 1-3, a micro-control valve body 1-4 and a micro-control valve 1-5, the spray cores 1-2 are positioned and arranged in mounting holes of the spray head base 1-1, internal threads 1-1-2 are arranged in the mounting holes, the micro-control valve bodies 1-4 are arranged in the mounting holes in a threaded fit mode, the sealing gaskets 1-3 are arranged between the spray cores 1-2 and the micro-control valve bodies 1-4, and the micro-control valves 1-5; the micro-control valve bodies 1-4 of the two groups of nozzle assemblies are respectively connected with the spray pipe 4 through the connecting pipe 2, the spray cores 1-2 and the nozzle openings 1-2-2 of the two groups of nozzle assemblies are oppositely arranged at a certain included angle, and the plane formed by intersecting the spray axes of the two groups of nozzle assemblies is vertical to the opening direction of the nozzle openings 1-2-2 of the two spray cores 1-2. The assembly structure is beneficial to the universality and replaceability of parts so as to adapt to different environmental requirements; meanwhile, the nozzle assembly is provided with an independent micro-regulating valve, so that the spraying pressure of the two jet flows can be controlled and regulated within a certain range, and the particle size of the fog drops can be controlled more accurately.

In the embodiment, the jet included angle of the nozzle openings 1-2-2 of the spray cores 1-2 of the two groups of nozzle assemblies is 25-45 degrees, preferably the jet included angle of the nozzle openings 1-2-2 of the spray cores 1-2 of the two groups of nozzle assemblies is 30-40 degrees, so that the spray nozzle has better uniformity of droplet particle size and better droplet quality. Experiments show that: when the temperature is close to 30 ℃, the uniformity and consistency of the particle size of the fog drops in the whole spraying field are good (for example, the particle size of the fog drops has good uniformity within the range of 300-500 mm of the height of a working area); when the temperature is close to 40 degrees, the particle diameters of the droplets at different heights can be obviously changed, so that the particle diameters of the droplets at a certain height in a spray field can be accurately controlled. In the embodiment, the spraying pressure of the two fan-shaped jets can reach 0.8MPa or even higher, preferably, the spraying pressure of the two fan-shaped jets can be controlled within 0.5-0.7 MPa, and compared with the spraying pressure of the traditional fan-shaped nozzle which is mostly within 0.15-0.3MPa, the spray droplet has larger particle size and higher spraying speed, and has better float resistance and penetration capability, and wider spraying pressure regulating range.

In addition, in order to ensure the assembly precision of the spray head 1, the two mounting holes of the spray head base 1-1 are respectively provided with a mounting reference 1-1-1 (see figure 8), the mounting reference 1-1-1 can be a positioning boss, the outer side of the spray core 1-2 is provided with a matching reference surface 1-2-1 (see figure 9), and the spray core 1-2 is in positioning matching installation with the mounting reference 1-1-1 in the mounting holes through the matching reference surface 1-2-1, so that the assembly precision of the spray head 1 is higher, and the precision requirement of the plant protection fan-shaped spray is ensured. As shown in fig. 8, the bottom of the nozzle base 1-1 is further provided with two cut groove angles 1-1-3 corresponding to the nozzle openings 1-2-2 of the corresponding side spray cores 1-2, and the two cut groove angles 1-1-3 are arranged, so that the formation and the impact of two fan-shaped jet flows are facilitated, and the wider coverage surface of the spray fan surface is ensured; the size of the nozzle opening 1-2-2 can be designed and manufactured according to the nozzle opening requirements of the existing standard fan-shaped spray head. The top of the spray head base 1-1 is provided with two inclined planes with a certain included angle, the mounting hole is arranged on the inclined planes, and the supplementary angle of the included angle between the inclined planes is the included angle between the nozzle openings of the spray cores of the two groups of nozzle assemblies, so that the processing of the mounting hole is facilitated, and meanwhile, the assembly precision of the two groups of nozzle assemblies is guaranteed. Each group of nozzle assemblies is provided with an independent micro-regulating valve 1-5, as shown in figure 10, the micro-regulating valve 1-5 comprises a valve core rod 1-5-1, a fine thread external thread 1-5-2 and a limit reference 1-5-3, the fine thread external thread 1-5-2 is arranged at one end of the valve core rod 1-5-1 and is used for being in threaded connection with a valve hole on the side wall of a micro-control valve body 1-4, the limit reference 1-5-3 is arranged at the outer side end part of the fine thread external thread 1-5-2, an adjusting button is further arranged at the outer side of the limit reference 1-5-3, an adjusting valve sealing ring 1-6 is further arranged between the limit reference 1-5-3 and the valve hole on the side wall of the micro-control valve body 1-4, and the injection pressure of each nozzle assembly can be adjusted by rotating the, so as to accurately control the droplet size. In order to facilitate the disassembly and assembly of the spray head 1, the connecting pipe 2 and the spray pipe 4 and the connecting pipe 2 and the micro control valve bodies 1 to 4 are connected through the clamping hoops 3, so that the connection is firm, and the disassembly is convenient.

Example 2

The basic structure and the working principle of the plant protection fan-shaped spraying device based on the impinging stream theory in the embodiment are the same as those in the embodiment 1, and the difference is that: in the embodiment, the spray core 1-2 and the nozzle base 1-1 are designed and manufactured into a whole, that is, the spray core 1-2 is integrally formed on the nozzle base 1-1, so that the assembly error is reduced, and the spray nozzle is suitable for the situation with higher requirement on the spraying accuracy.

The utility model discloses a fan-shaped atomizer of plant protection based on striking flows theory mainly has following beneficial effect:

1) has the characteristics of narrow fog drop spectrum, good particle size uniformity and the like. Tests show that the fog drops are distributed more intensively, and the transverse deposition distribution form is close to or reaches the saddle-shaped distribution, which indicates that the fog drops have uniform grain diameter and narrow fog drop spectrum.

2) Wide pressure regulating range and good float resistance. Ordinary fan nozzle spraying pressure is mostly at 0.15 ~ 0.3MPa, the utility model discloses a spraying pressure can reach 0.8MPa higher even, and the best operating pressure scope is at 0.5 ~ 0.7MPa, and two efflux striking back relative haplopore fan nozzle can generate great droplet particle diameters, and the droplet particle diameter is great and have a certain speed, means that the droplet has better anti performance of wafing and penetrability.

3) In the formed spray field, the droplet size in the spray fan-shaped surface is characterized by larger middle and smaller uniform two sides, so that smaller droplets arranged in the overlapping area of the adjacent two spray fan-shaped edges of the spray rod type sprayer can be combined or aggregated into larger droplets, the diameters of the droplets are close to or reach the diameter of the droplets in the middle area, and the non-uniformity of the droplet size distribution of the spray rod type sprayer can be improved.

4) The two jet impact angles (the included angle between the two jets) are within 25-45 degrees, when the angle is 30-40 degrees, the better uniformity of the droplet particle size is achieved, the droplet quality is better, the uniformity of the droplet particle size in the whole spraying field is better when the angle is close to 30 degrees, the droplet particle size at different heights can be remarkably changed when the angle is close to 40 degrees, and the accurate control of the droplet particle size at a certain height in the spraying field is facilitated.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without creatively designing the similar structural modes and embodiments to the technical solutions, they should belong to the protection scope of the present invention.

Claims (8)

1. The utility model provides a fan-shaped atomizer of plant protection based on impinging stream theory, includes shower nozzle (1), connecting pipe (2), spray tube (4) and air-vent valve (5), shower nozzle (1) connect spray tube (4) through connecting pipe (2), air-vent valve (5) locate on spray tube (4), its characterized in that: the spray head (1) comprises a spray head base (1-1) and two groups of spray nozzle components, the two groups of spray nozzle components are close to each other and are arranged on the spray head base (1-1) at a certain included angle, the nozzle component comprises a spray core (1-2), a sealing gasket (1-3), a micro control valve body (1-4) and a micro regulating valve (1-5), the spray core (1-2) is positioned and arranged in the mounting hole of the spray head base (1-1) or integrally formed on the spray head base (1-1), the micro control valve body (1-4) is arranged on the nozzle base (1-1), the micro-regulating valve (1-5) is arranged on the micro-control valve body (1-4); the micro-control valve bodies (1-4) of the two groups of nozzle assemblies are respectively connected with the spray pipe (4) through the connecting pipe (2), the spray cores (1-2) and the nozzle openings (1-2-2) of the two groups of nozzle assemblies are oppositely arranged at a certain included angle, and the plane formed by intersecting the spray axes of the two groups of nozzle assemblies is vertical to the opening direction of the nozzle openings (1-2-2) of the two spray cores (1-2).

2. The plant protection fan-shaped spraying device based on the impinging stream theory as claimed in claim 1, wherein: the jet flow included angle of the nozzle openings (1-2-2) of the spray cores (1-2) of the two groups of nozzle assemblies is 25-45 degrees.

3. The plant protection fan-shaped spraying device based on the impinging stream theory as claimed in claim 1, wherein: the jet flow included angle of the nozzle openings (1-2-2) of the spray cores (1-2) of the two groups of nozzle assemblies is 30-40 degrees.

4. The plant protection fan-shaped spraying device based on the impinging stream theory as claimed in claim 3, wherein: the spray nozzle is characterized in that two mounting holes are formed in the spray nozzle base (1-1), the spray core (1-2) is installed in the mounting holes of the spray nozzle base (1-1) in a positioning mode, mounting references (1-1-1) are arranged in the two mounting holes, a matching reference surface (1-2-1) is arranged on the outer side of the spray core (1-2), and the spray core (1-2) is installed in a positioning matching mode with the mounting references (1-1-1) in the mounting holes through the matching reference surface (1-2-1).

5. The plant protection fan-shaped spraying device based on the impinging stream theory as claimed in claim 4, wherein: the top of the nozzle base (1-1) is provided with two inclined planes which are arranged at a certain included angle, and the mounting hole is arranged on the inclined planes.

6. The plant protection fan-shaped spraying device based on the impinging stream theory as claimed in any one of claims 1 to 5, wherein: the bottom of the spray head base (1-1) is also provided with two groove cutting angles (1-1-3) corresponding to the nozzle openings (1-2-2) of the corresponding side spray cores (1-2).

7. The plant protection fan-shaped spraying device based on the impinging stream theory as claimed in claim 6, wherein: the micro-regulating valve (1-5) comprises a valve core rod (1-5-1), a fine thread external thread (1-5-2) and a limiting reference (1-5-3), wherein the fine thread external thread (1-5-2) is arranged at one end of the valve core rod (1-5-1), used for being in threaded connection with a valve hole on the side wall of the micro-control valve body (1-4), the limiting reference (1-5-3) is arranged at the outer side end of the fine thread external thread (1-5-2), and the outer side of the limit reference (1-5-3) is also provided with an adjusting button, and an adjusting valve sealing ring (1-6) is also arranged between the limit reference (1-5-3) and a valve hole on the side wall of the micro control valve body (1-4).

8. The plant protection fan-shaped spraying device based on the impinging stream theory as claimed in claim 7, wherein: the connecting pipe (2) is connected with the spray pipe (4) and the connecting pipe (2) is connected with the micro-control valve body (1-4) through the clamping hoop (3).

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