Fan-shaped air suction spray head capable of adjusting bubbles in spray head

Abstract

The invention provides a fan-shaped air suction spray head capable of adjusting bubbles in the spray head, which comprises a spray head shell, a gas-liquid mixing flow channel is arranged in the spray head shell, and the gas-liquid mixing flow channel is provided with a pore plate for rectification and preliminary bubble adjustment; an adjustable turntable is arranged in the gas-liquid mixing flow channel below the pore plate, air holes with different sizes are formed in the adjustable turntable, and the sizes of generated bubbles are changed by selecting the air holes with different sizes; a stirring device is arranged in the gas-liquid mixing flow channel below the adjustable turntable and is used for expanding the distribution of bubble groups; and a wedge-shaped nozzle is arranged at an outlet of the gas-liquid mixing runner. Rectification and preliminary bubble adjustment are achieved through the pore plate, the bubble size is adjusted through the adjustable rotating disc, bubble groups are distributed to the whole space through the stirring device, and the bubble uniformity of a nozzle outlet is improved.

Description

Technical Field

[0001] The invention relates to the field of air suction nozzles or the field of plant protection mechanical atomization spraying, and in particular to a fan-shaped air suction nozzle with adjustable internal air bubbles in the nozzle. Background Art

[0002] Spray drift is an important factor affecting the quality of spraying operations and causing pesticide hazards. The suction nozzle is an effective anti-drift technology. Based on the Venturi effect, the suction nozzle automatically inhales air and mixes it with the liquid medicine to form a gas-liquid mixed flow. The bubble droplets formed by its atomization have a larger particle size and are not easy to drift. The bubble size distribution inside the nozzle directly affects the particle size distribution of the spray droplets and the spray stability. If the bubble size difference is significant, on the one hand, bubbles of different sizes will form droplets with large differences in particle size, resulting in poor uniformity of the spray droplets; on the other hand, bubble stratification may occur, that is, bubbles of different sizes form different layers in space, resulting in irregular pulsation of the spray and affecting the stability of the spray. However, the existing suction nozzles lack a bubble uniformity adjustment structure, which limits their promotion and application.

[0003] Traditional pesticide application methods often ignore the changes in pest and disease disasters in a certain area and adopt a consistent application rate, resulting in insufficient use of chemical pesticides in some operating areas and excessive application in some places. Precision pesticide application is an important part of precision agriculture. It can meet the increasingly high environmental protection requirements and achieve the operation requirements of low-volume, precise application, less pollution, high efficacy, and high prevention efficiency. When performing precise target application, the most ideal way is to control the fan-shaped blade angle of the suction nozzle according to the size of the target, so that the liquid is sprayed only on the crop target as much as possible, thereby improving the utilization rate of pesticides. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a fan-shaped air suction nozzle with adjustable internal bubbles in the nozzle, which realizes rectification and preliminary bubble adjustment through a orifice plate, adjusts the bubble size through an adjustable turntable, and distributes the bubble group to the entire space through a stirring device, thereby improving the uniformity of bubbles at the nozzle outlet.

[0005] The present invention achieves the above technical objectives through the following technical means.

[0006] A fan-shaped air suction nozzle with adjustable internal bubbles comprises a nozzle shell, a gas-liquid mixing flow channel is arranged in the nozzle shell, the gas-liquid mixing flow channel is provided with a orifice plate for rectification and preliminary bubble adjustment; an adjustable turntable is arranged in the gas-liquid mixing flow channel below the orifice plate, the adjustable turntable has air holes of different sizes, and the size of the generated bubbles can be changed by selecting air holes of different sizes; a stirring device is arranged in the gas-liquid mixing flow channel below the adjustable turntable for expanding the distribution of the bubble group; a wedge-shaped nozzle is arranged at the outlet of the gas-liquid mixing flow channel.

[0007] Furthermore, the nozzle housing is a split structure, and a perforated plate is installed between the nozzle housings of the split structure, and the perforated plate has a plurality of through holes evenly distributed at the gas-liquid mixing flow channel.

[0008] Furthermore, the adjustable turntable includes an adjusting cover, an air hole plate and a transmission device; air holes of different sizes are distributed on the air hole plate, and a central axis is provided in the center of the air hole plate; closed areas and open areas are alternately distributed on the adjusting cover, and the adjusting cover can be rotatably installed on the central axis. The outer ring of the adjusting cover is provided with external teeth, and the adjusting cover is rotated by the transmission device to connect the air holes of different sizes with the open area.

[0009] Furthermore, the size of the pores on the pore sheet is smaller than the size of the through holes on the orifice plate.

[0010] Furthermore, the pore sheet is divided into a plurality of sector-shaped areas, each sector-shaped area is evenly distributed with a plurality of pores, and the diameters of the pores in adjacent sector-shaped areas are different.

[0011] Furthermore, the pore sheet is divided into a plurality of sector-shaped areas, each sector-shaped area is evenly distributed with a plurality of pores, and the diameter of the pores in each sector-shaped area changes gradually along the circumferential direction.

[0012] Furthermore, the stirring device includes a support and a blade, wherein the support is fixed to the inner wall surface of the gas-liquid mixing channel, and the bottom of the support supports a rotatable blade, and the rotation of the blade generates stirring through the impact of the two-phase flow.

[0013] Furthermore, an adjustable fan-shaped piece is installed at the outlet of the nozzle housing, and a wedge angle is provided on the adjustable fan-shaped piece. The taper of the outer side of the wedge angle cooperates with the wedge-shaped nozzle, and the taper of the inner side of the wedge angle ranges from 15° to 45°; an outlet with a semicircular curved surface is provided on the inner side of the wedge angle.

[0014] Furthermore, the diffusion angle of the nozzle spray can be changed by selecting wedge angles with different inner tapers.

[0015] The beneficial effects of the present invention are:

[0016] 1. The fan-shaped air suction nozzle with bubbles inside the adjustable nozzle of the present invention realizes rectification and preliminary bubble adjustment through an orifice plate, adjusts the bubble size through an adjustable turntable, distributes the bubble group to the entire space through a stirring device, and improves the bubble uniformity at the nozzle outlet.

[0017] 2. The fan-shaped air suction nozzle with adjustable internal bubbles of the nozzle described in the present invention has an orifice plate installed between the nozzle shells of the split structure, and the orifice plate realizes the adjustment of the uniformity of the bubbles.

[0018] 3. The fan-shaped air suction nozzle with bubbles inside the adjustable nozzle described in the present invention has air holes of different apertures distributed on the adjustable turntable. The opening range of the adjustable turntable is adjusted by a transmission device, so that the two-phase flow passes through small holes of different apertures, thereby realizing the adjustment of the uniformity of the bubbles.

[0019] 4. The fan-shaped air suction nozzle with bubbles inside the adjustable nozzle described in the present invention is provided with a stirring device in the gas-liquid mixing flow channel below the adjustable turntable. The blades rotate due to the impact of the two-phase flow, and the rotation of the blades also stirs the fluid in the mixing chamber, thereby achieving the purpose of adjusting the uniformity of the bubbles.

[0020] 5. The adjustable internal bubble fan-shaped air suction nozzle of the nozzle of the present invention has an adjustable fan-shaped piece installed at the nozzle housing outlet, and the spray diffusion angle outside the nozzle can be adjusted by installing adjustable fan-shaped pieces of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a cross-sectional view of the fan-shaped air suction nozzle described in the present invention.

[0023] Figure 2 It is a cross-sectional view of the upper body of the present invention.

[0024] Figure 3 It is a cross-sectional view of the lower body of the present invention.

[0025] Figure 4 Schematic diagram of the orifice plate of the present invention.

[0026] Figure 5 It is a schematic diagram of the adjustable turntable of the present invention.

[0027] Figure 6 It is a schematic diagram of the regulating cover described in the present invention.

[0028] Figure 7 This is a schematic diagram of the pore distribution method described in the present invention.

[0029] Figure 8 Schematic diagram of different positions of the adjustable turntable according to the present invention.

[0030] Fig. 9 This is a second schematic diagram of the pore distribution method described in the present invention.

[0031] Fig.10This is a schematic diagram of the detachable joystick of the present invention.

[0032] Fig.11 This is a schematic diagram of the rotating blade described in the present invention.

[0033] Fig.12 It is a schematic diagram of the adjustable sector piece described in the present invention.

[0034] Fig.13 The cross-sectional view of the air suction nozzle equipped with adjustable fan-shaped pieces according to the present invention.

[0035] In the figure:

[0036] 1-upper body; 11-liquid inlet; 12-throat; 13-air inlet; 14-diffuser; 2-lower body; 21-gas-liquid mixing section; 22-spray hole; 24-wedge-shaped outlet; 3-orifice plate; 4-adjustable turntable; 41-adjusting cover; 411-closed area; 412-open area; 42-air hole plate; 421-small diameter part; 422-large diameter part; 423-air hole; 43-transmission device; 431-joystick; 5-rotating blade; 51-blade; 52-pillar; 6-adjustable fan-shaped piece; 61-wedge angle; 62-semicircular surface; 63-positioning column. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] like Figure 1 As shown, the adjustable internal bubble fan-shaped air suction nozzle of the nozzle of the present invention comprises a nozzle shell, a gas-liquid mixing flow channel is provided in the nozzle shell, and the gas-liquid mixing flow channel is provided with an orifice plate 3 for rectification and preliminary bubble adjustment; an adjustable turntable 4 is provided in the gas-liquid mixing flow channel below the orifice plate 3, and the adjustable turntable 4 has air holes of different sizes, and the size of the generated bubbles can be changed by selecting air holes of different sizes; a stirring device is provided in the gas-liquid mixing flow channel below the adjustable turntable 4, which is used to expand the distribution of the bubble group; a wedge-shaped nozzle is provided at the outlet of the gas-liquid mixing flow channel. The nozzle shell is made of transparent glass, and the adjustable turntable 4 is made of plastic, so that the opening position of the adjustable turntable 4 can be easily observed.

[0041] The nozzle housing is a split structure, formed by connecting an upper body 1 and a lower body 2. Figure 2 As shown, the upper body 1 includes a liquid inlet 11, a throat 12 and a diffuser 14. The liquid inlet 11 is connected to the throat 12. Both sides of the throat 12 are provided with air inlet holes 13 for air intake. The outlet of the throat 12 is connected to the diffuser 14. Both sides of the upper body 1 are provided with connecting through holes for docking with the lower body 2. Figure 3 As shown, the lower body 2 includes a gas-liquid mixing section 21, a spray hole 22 and a wedge-shaped outlet 24. The inlet of the gas-liquid mixing section 21 is connected to the diffuser 14. The outlet of the gas-liquid mixing section 21 is provided with a spray hole 22, which is hemispherical. The bottom of the lower body 2 is a wedge-shaped outlet 24, which forms the outlet of the nozzle through the spray hole 22. Four connecting holes are provided on both sides of the bottom of the lower body 2 for connecting with the adjustable fan-shaped piece 6. The throat 12, the diffuser 14 and the gas-liquid mixing section 21 constitute a gas-liquid mixing flow channel.

[0042] like Figure 4 As shown, the orifice plate 3 is installed between the upper body 1 and the lower body 2, and the orifice plate 3 is clamped by fasteners. After being fixed, there is no gap between the upper body 1, the gasket 3, and the lower body 2. The orifice plate 3 is evenly distributed with a plurality of through holes at the gas-liquid mixing flow channel. Figure 4As shown, the shape of the through hole in the orifice plate 3 includes but is not limited to a circle, a square, an equilateral hexagon, a triangle, a rhombus, an ellipse, etc.; if the shape of the through hole of the orifice plate 3 is a circle, the diameter of the circle is between 0.3-0.6mm; if the shape of the through hole of the orifice plate 3 is a square, the side length of the square is between 0.3-0.6mm; if the shape of the through hole of the orifice plate 3 is an equilateral hexagon, the diameter of the inscribed circle of the equilateral hexagon is between 0.3-0.6mm, and if the shape of the through hole of the orifice plate 3 is other shapes, the size range should also be adjusted accordingly according to the specific shape. The thickness of the orifice plate 3 is in the range of 0.5-1mm.

[0043] like Figure 5 and Fig.10 As shown, the adjustable turntable 4 includes an adjustment cover 41, an air hole sheet 42 and a transmission device; air holes 423 of different sizes are distributed on the air hole sheet 42, and a central axis is provided in the center of the air hole sheet 42; the closed area 411 and the open area 412 are alternately distributed on the adjustment cover 41, and the adjustment cover 41 is rotatably mounted on the central axis. The outer ring of the adjustment cover 41 is provided with external teeth, and the adjustment cover 41 is rotated by the transmission device to connect the air holes 423 of different sizes with the open area 412. The size of the air holes 423 on the air hole sheet 42 is smaller than the size of the through hole on the orifice plate 3. The transmission device 43 is also arranged with gears on the circumference, and matches with the gears on the circumference of the adjustment cover 41. The gear matching can be a bevel gear matching or a worm gear matching. In the embodiment, the transmission device 43 is a rotating operating rod 431 with teeth on one end, and the other end of the rotating operating rod 431 extends to the outside of the lower body 2, and the adjustment cover 41 is rotated by manual rotation.

[0044] like Figure 6 As shown, the regulating cover 41 is circular, and its diameter is slightly smaller than the diameter of the gas-liquid mixing section 21. The regulating cover 41 is alternately distributed with the closed area 411 and the open area 412, and the distribution of the closed area 411 and the open area 412 is as follows: the regulating cover 41 is evenly divided into sectors with the same area, and the number of sectors is an even number, and the closed area 411 and the open area 412 are alternately arranged on these sectors. In the embodiment, the regulating cover 41 is evenly divided into 6 sectors, and the closed area 411 and the open area 412 appear alternately, each including 3 sectors. The positions of the closed area 411 and the open area 412 can be adjusted by rotating the regulating cover 41.

[0045] like Figure 7As shown, the pore sheet 42 is provided with pores 423, and the shapes of the pores 423 include, but are not limited to, circles, squares, equilateral hexagons, triangles, rhombuses, and ellipses. If the shape of the pores 423 is a circle, the diameter of the circle is between 0.1-0.3 mm; if the shape of the pores 423 is a square, the side length of the square is between 0.1-0.3 mm; if the shape of the pores 423 is an equilateral hexagon, the diameter of the inscribed circle of the equilateral hexagon is between 0.05-0.15 mm; if the shape of the pores 423 is other shapes, the size range should also be adjusted accordingly according to the specific shape. The pores 423 are distributed within a circular area, and the diameter of the circular area is the same as the diameter of the gas-liquid mixing section 21.

[0046] like Figure 7 The first distribution mode of the pores 421 is: the pore sheet 42 is evenly divided into sectors with the same area, the number of sectors is an even number, and adjacent sectors are arranged with pores 421 with different diameters. Specifically, the pore sheet 42 is evenly divided into 6 sectors, and adjacent sectors are alternately arranged with large-diameter pores and small-diameter pores, that is, 3 sectors are arranged with small-diameter pores, which are the small-diameter part 421; the other 3 sectors are arranged with large-diameter pores, which are the large-diameter part 422. Under this distribution mode, the number of sectors divided by the pore sheet 42 is the same as the number of sectors on the adjustment cover 41.

[0047] like Fig. 9 The second distribution mode of the air holes 421 is to evenly divide the air hole sheet 42 into sectors of equal area, and the diameter of the air holes 423 on each sector gradually increases along the circumferential direction. In this distribution mode, the number of sectors divided by the air hole sheet 42 is half the number of sectors on the regulating cover 41.

[0048] like Figure 8 As shown, when the adjustment cover 41 of the adjustable turntable 4 is rotated to different positions, the adjustable turntable 4 has different effects on adjusting bubbles due to the different diameters of the blocked pores 423 on the pore sheet 42. For example, when the small diameter portion 421 of the pore sheet 42 is blocked by the adjustment cover 41, the diameter of the bubble adjusted by the large diameter portion 422 is relatively large; when the large diameter portion 422 of the pore sheet 42 is blocked by the adjustment cover 41, the diameter of the bubble adjusted by the small diameter portion 421 is relatively small. When the adjustment cover 41 is rotated to other positions, the bubble diameter is related to the area ratio of the small diameter portion 421 and the large diameter portion 422 blocked.

[0049] like Fig.11As shown, the stirring device includes a support 52 and a paddle 51. The support 52 is fixed to the inner wall of the gas-liquid mixing channel. The bottom of the support 52 supports the rotatable paddle 51. The rotation of the paddle generates stirring through the impact of the two-phase flow to adjust the uniformity of the bubbles. The shape of the paddle 51 includes but is not limited to a straight blade shape, a curved blade shape, a sickle shape, a trapezoidal shape, an inverted trapezoidal shape, and other shapes with similar functions.

[0050] like Fig.12 As shown, the nozzle housing outlet is installed with an adjustable sector piece 6 through a positioning column 63, and a wedge angle 61 is provided on the adjustable sector piece 6. The taper of the outer side of the wedge angle 61 cooperates with the wedge-shaped nozzle, and the taper of the inner side of the wedge angle 61 ranges from 15° to 45°, and can specifically be 15°, 20°, 25°, 30°, 35°, 40° or 45°, and any other angle within this range; an outlet with a semicircular curved surface 62 is provided on the inner side of the wedge angle 61.

[0051] like Fig.13 As shown, the external spray diffusion angle of the nozzle can be adjusted by installing different adjustable fan-shaped pieces 6; when the adjustable fan-shaped piece 6 is installed together with the lower main body 2, the upper side of the wedge angle 61 of the adjustable fan-shaped piece 6 fits with the wedge-shaped outlet 24 of the lower main body 2 of the nozzle, and the semicircular curved surface 62 of the adjustable fan-shaped piece 6 also fits with the nozzle terminal 23 of the lower main body 2.

[0052] Example 1

[0053] like Fig.13 As shown, the adjustable fan-shaped piece 6 is installed at the outlet position of the lower body 2 of the nozzle; the lower side angle of the wedge angle 61 of the adjustable fan-shaped piece 6 varies in the range of 15°-45°. When the adjustable fan-shaped piece 6 with different wedge angles 61 is installed, the spray angle generated is also different. When the present invention is used, it needs to be installed at the end of the spraying system like a conventional fan-shaped nozzle. Fig.12 As shown, the wedge angle 61 of the adjustable fan-shaped piece 6 installed in this embodiment is 20°; after passing through the gas-liquid mixing section 21, the two-phase flow passes through the nozzle hole 22, and at the nozzle outlet the two-phase flow passes through the wedge angle 61 of 20° to become a fan-shaped spray, thereby realizing the adjustment of the spray diffusion angle outside the nozzle.

[0054] In this embodiment, the orifice plate 3 is circular with a diameter of 0.2 mm. The drug liquid enters the throat 12 through the liquid inlet hole 11. Air inlet holes 13 are provided on both sides of the throat 12 for air intake. Based on the Venturi effect, the air suction nozzle automatically inhales air and mixes with the drug liquid to form a gas-liquid two-phase flow; the two-phase flow enters the diffusion section 14, and the diffusion section 14 can improve the stability of the mixed flow; then the two-phase flow flows into the orifice plate 3, and the bubbles are divided into small bubbles with a size of 0.2 mm through the through holes of the orifice plate 3, thereby achieving preliminary adjustment and rectification of the bubble uniformity; the circular hole is beneficial to improving the separation efficiency and reducing the flow resistance, but the circular hole may cause the bubbles to form a symmetrical bubble shape in the gasket hole 31, which is not conducive to the complete filtration of the bubbles, so other devices are required to further adjust the bubble uniformity.

[0055] The air holes 423 used in the adjustable turntable are triangular in shape, and the distribution of the air holes 423 is one of the distribution modes; the side length of the air holes 423 in the large diameter portion 422 of the air hole sheet 42 is 0.2 mm, and the side length of the air holes 423 in the small diameter portion 421 is 0.1 mm; Figure 8 As shown, by rotating the joystick 431, the adjustment cover 41 completely blocks the small diameter part 421, that is, the bubbles only pass through the large diameter part 422, so as to further adjust the uniformity of the bubbles. In this embodiment, the advantage of the triangular hole is that it can increase the contact area between the bubbles and the hole wall. The sharp corners of the triangular hole can effectively cut the bubbles, making them easier to be uniformized. However, the sharp corners of the triangular hole may cause the bubbles to encounter greater resistance when passing through the hole, so the triangular hole is placed after the first adjustment. When a two-phase flow flows through, the blade 51 rotates due to the impact of the two-phase flow, and the rotation of the blade 51 produces a stirring effect, so that the bubbles are evenly distributed in the gas-liquid mixing section 21.

[0056] Example 2

[0057] When the present invention is used, it needs to be installed at the end of the spraying system like a conventional fan-shaped nozzle. Figure 1 As shown, in this embodiment, the through hole of the orifice plate 3 installed is circular with a diameter of 0.2 mm; Fig. 9 As shown, the shape of the air holes 423 of the adjustable turntable 4 installed in this embodiment is also circular, the distribution mode of the air holes 423 is the second distribution mode, and the diameter range of the air holes 423 is between 0.1-0.3mm; the wedge angle 61 of the adjustable fan-shaped piece 6 installed in this embodiment is 20°; the blade 51 installed in this embodiment is a straight blade blade.

[0058] The liquid medicine entering the nozzle first passes through the liquid inlet hole 11 and the throat 12. Both sides of the throat 12 are provided with air inlet holes 13 for air intake. Based on the Venturi effect, the air suction nozzle automatically inhales air and mixes with the liquid medicine to form a gas-liquid two-phase flow; the two-phase flow enters the diffusion section 14, and the diffusion section 14 can improve the stability of the mixed flow; the bubbles are divided into small bubbles with a size not greater than 0.2 mm through the through holes of the orifice plate 3, eliminating uneven flow phenomena such as vortices and secondary flows in the two-phase flow, and achieving preliminary adjustment of the uniformity of the bubbles. The two-phase flow enters the gas-liquid mixing section 21 and passes through the adjustable turntable 4 fixed to the inner wall of the gas-liquid mixing section 21. In this embodiment, the two-phase flow is made to pass only through the smaller part of the air hole 423 by adjusting the joystick 431, that is, through the joint action of the air hole sheet 42 and the adjustment cover 41, the bubble diameter through the adjustable turntable 4 is not greater than 0.15mm, so as to further adjust the uniformity of the bubble; when the two-phase flow flows through, the blade 51 is impacted by the two-phase flow and rotates, and the rotation of the blade 51 produces a stirring effect, so as to achieve uniform distribution of the bubbles in the gas-liquid mixing section 21. After passing through the gas-liquid mixing section 21, the two-phase flow passes through the spray hole 22, and at the nozzle outlet, the two-phase flow passes through the wedge angle 61 of 20° to become a fan-shaped spray, so as to adjust the spray diffusion angle outside the nozzle.

[0059] In this embodiment, rectification and preliminary bubble adjustment are achieved through the orifice plate, the bubble size is adjusted by the adjustable turntable, and the bubble group is distributed to the entire space by the stirring device, thereby realizing the uniformity adjustment of the bubble size of the three-phase flow and the adjustment of the spray angle, and realizing the adjustment of the bubble size and the spray angle within a certain range; the spray is more evenly distributed in the target area, and the liquid medicine covers the target to the greatest extent, thereby achieving a wider coverage and better spray effect, improving the utilization rate of pesticides, and reducing the pollution caused by the abuse of pesticides.

[0060] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0061] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fan-shaped air suction nozzle with adjustable internal air bubbles, characterized in that: The nozzle shell comprises a gas-liquid mixing flow channel, wherein the gas-liquid mixing flow channel is provided with a perforated plate (3) for rectifying and initially adjusting bubbles; an adjustable turntable (4) is provided in the gas-liquid mixing flow channel below the perforated plate (3); the adjustable turntable (4) has air holes of different sizes, and the size of the generated bubbles can be changed by selecting air holes of different sizes; a stirring device is provided in the gas-liquid mixing flow channel below the adjustable turntable (4) for expanding the distribution of the bubble group; and a wedge-shaped nozzle is provided at the outlet of the gas-liquid mixing flow channel.

2. The adjustable internal bubble fan-shaped air suction nozzle according to claim 1, characterized in that: The nozzle shell is a split structure, and an orifice plate (3) is installed between the nozzle shells of the split structure. The orifice plate (3) has a plurality of through holes evenly distributed at the gas-liquid mixing flow channel.

3. The adjustable internal bubble fan-shaped air suction nozzle according to claim 1, characterized in that: The adjustable turntable (4) comprises an adjusting cover (41), an air hole sheet (42) and a transmission device; air holes (423) of different sizes are distributed on the air hole sheet (42), and a central axis is arranged at the center of the air hole sheet (42); closed areas (411) and open areas (412) are alternately distributed on the adjusting cover (41), the adjusting cover (41) is rotatably mounted on the central axis, and an outer ring of the adjusting cover (41) is provided with external teeth. The adjusting cover (41) is rotated by the transmission device to connect the air holes (423) of different sizes with the open area (412).

4. The adjustable internal bubble fan-shaped air suction nozzle according to claim 3, characterized in that: The size of the pores (423) on the pore sheet (42) is smaller than the size of the through holes on the orifice plate (3).

5. The adjustable internal bubble fan-shaped air suction nozzle according to claim 3, characterized in that: The pore sheet (42) is divided into a plurality of sector-shaped areas, each sector-shaped area is evenly distributed with a plurality of pores (423), and the diameters of the pores (423) in adjacent sector-shaped areas are different.

6. The adjustable internal bubble fan-shaped air suction nozzle according to claim 3, characterized in that: The pore sheet (42) is divided into a plurality of sector-shaped areas, each sector-shaped area is evenly distributed with a plurality of pores (423), and the diameter of the pores (423) in each sector-shaped area changes gradually along the circumferential direction.

7. The adjustable internal bubble fan-shaped air suction nozzle according to claim 1, characterized in that: The stirring device comprises a support (52) and a blade (51), wherein the support (52) is fixed to the inner wall surface of the gas-liquid mixing channel, and the bottom of the support (52) supports a rotatable blade (51), and the rotation of the blade generates stirring through the impact of two-phase flow.

8. The adjustable internal bubble fan-shaped air suction nozzle according to any one of claims 1 to 7, characterized in that: An adjustable fan-shaped piece (6) is installed at the outlet of the nozzle housing, and a wedge-shaped angle (61) is provided on the adjustable fan-shaped piece (6). The taper of the outer side of the wedge-shaped angle (61) matches the wedge-shaped nozzle, and the taper of the inner side of the wedge-shaped angle (61) ranges from 15° to 45°; an outlet with a semicircular curved surface (62) is provided on the inner side of the wedge-shaped angle (61).

9. The adjustable internal bubble fan-shaped air suction nozzle according to claim 8, characterized in that: The diffusion angle of the spray from the nozzle can be changed by selecting a wedge angle (61) with different inner tapers.

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