Fan-shaped suction head with variable air intake position

Abstract

The application provides a fan-shaped air suction type nozzle with variable air inlet position, comprising a hole plate, a center body and a nozzle, the hole plate is arranged at the inlet end of the center body through a hole plate shaft sleeve, and the nozzle is arranged at the outlet end of the center body through a nozzle shaft sleeve; the hole plate is provided with a liquid inlet hole connected to the inlet end of a throat pipe arranged in the center body, and the throat pipe is connected to the nozzle through a mixing cavity arranged at the outlet end of a diffusion section, characterized in that an adjustable air suction device is arranged on the side wall of the center body for adjusting the air suction amount under different scenes and realizing controllable adjustment of the air content of the mist droplets. The application can change the air inlet position of the air suction type nozzle by arranging different through holes or grooves and adopting different hole blocking or groove blocking modes, thereby changing the air inlet amount of the air suction type nozzle, and facilitating application to more extensive plant protection spraying occasions.

Description

Technical Field

[0001] This invention relates to the field of atomized spraying in plant protection machinery, and particularly to a fan-shaped intake nozzle with a variable air intake position. Background Technology

[0002] Air-inhaling nozzles are widely used in plant protection spraying. They reduce drift and improve deposition by generating aerosolized droplets. The gas content of the droplets plays a crucial role in their anti-drift and deposition properties, and this droplet gas content is closely related to the air intake capacity of the air-inhaling nozzle. Studies have shown that air-inhaling nozzles have a larger air intake capacity when the air inlet is located at the upper end of the nozzle throat, and a smaller air intake capacity when the air inlet is located at the lower end of the nozzle throat. Different application scenarios have different requirements for air intake capacity, but currently available commercially available air-inhaling nozzles have fixed air inlet positions and cannot adjust the air intake capacity, thus greatly limiting their application and failing to meet the needs of complex and variable pesticide application environments. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a fan-shaped air intake nozzle with a variable air intake position. By setting different through holes or channels and using different hole or channel blocking methods, the air intake position of the air intake nozzle can be changed, thereby adjusting the spray characteristics and facilitating its application in a wider range of plant protection spraying situations.

[0004] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0005] A fan-shaped intake nozzle with variable air inlet position includes an orifice plate, a central body, and a nozzle. The orifice plate is mounted at the inlet end of the central body via an orifice plate bushing, and the nozzle is mounted at the outlet end of the central body via a nozzle bushing. The orifice plate and its bushing, as well as the nozzle and its bushing, can be connected to the central body via threads. The orifice plate has a liquid inlet hole connected to the inlet end of a throat located within the central body. The diameter of the liquid inlet hole is variable, ranging from 0.5 to 1 mm, and the diameter ratio of the throat to the liquid inlet hole ranges from 1.5 to 2.5. The throat is connected to the nozzle via a mixing chamber located at the outlet end of the diffuser section. An adjustable intake device is provided on the side wall of the central body to adjust the air inlet position under different scenarios, achieving controllable adjustment of the droplet gas content.

[0006] Furthermore, the adjustable suction device includes several through holes and several sealing devices that cooperate with the through holes. The through holes are set at different height positions on the side wall of the central body, with at least one through hole at each height position. The through holes are connected to the throat tube. The diameter of the through holes is smaller than the diameter of the throat tube, and is used to draw gas into the throat tube during the injection process.

[0007] Furthermore, the sealing device is a plugging nut, the thickness of which is greater than the diameter of the through hole, used to completely seal the through hole that does not require air intake. An external thread is provided on the side wall of the central body, and the plugging nut engages with the external thread on the side wall of the central body. By rotating the plugging nut, the through hole can be connected to or blocked from the outside atmosphere.

[0008] Furthermore, the sealing device is a plugging screw, which has a corresponding internal thread in the through hole. The plugging screw is connected to the through hole, and by installing or removing the plugging screw, the through hole can be connected to or blocked from the outside atmosphere.

[0009] Furthermore, the adjustable suction device includes a channel disposed on the side wall of the central body. A rectangular channel located in the middle of the channel connects the throat and the channel. The length of the channel is greater than the length of the rectangular channel. The rectangular channel connects the channel and the throat respectively. A slider is disposed in the channel. The slider is provided with a suction hole and a lever. The slider blocks the rectangular channel. When liquid passes through the throat, a negative pressure effect is generated, and gas can only enter the throat through the suction hole on the slider. By moving the lever, the slider moves up and down in the channel to change the position of the suction hole, thereby achieving the effect of adjusting the spray characteristics.

[0010] Furthermore, the thickness of the channel is 0.5 to 0.7 times the thickness of the throat sidewall; the length of the channel is 0.6 to 0.8 times the length of the throat.

[0011] Furthermore, sealing gaskets are provided between the orifice plate and the center body and between the nozzle and the center body to ensure the airtightness of the nozzle.

[0012] Furthermore, the ratio of the diameter of the through hole to the diameter of the throat tube is between 0.3 and 0.8, which ensures that gas is drawn into the throat tube under atmospheric pressure.

[0013] The beneficial effects of this invention are as follows:

[0014] The variable air intake fan-shaped suction nozzle of this invention is equipped with an adjustable air intake device. By setting different through holes or channels, and using different plugging methods, the air intake position of the suction nozzle can be changed to adapt to the different air intake requirements of different application scenarios. Therefore, it overcomes the problem of limited application scenarios and can meet the needs of complex and variable pesticide application environments, greatly improving economic efficiency. The number of through holes connected to the throat can also be changed, thereby changing the air intake of the suction nozzle to meet the needs of complex and variable pesticide application environments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are some embodiments of the present invention. For those skilled in the art, it is obvious that other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the fan-shaped suction nozzle with variable air intake position according to the present invention.

[0017] Figure 2 This is a rendering of the first embodiment of the fan-shaped suction nozzle with variable air intake position according to the present invention;

[0018] Figure 3 This is a schematic diagram of the second embodiment of the fan-shaped suction nozzle with variable air intake position according to the present invention.

[0019] Figure 4 This is a schematic diagram of the third embodiment of the fan-shaped suction nozzle with variable air intake position according to the present invention.

[0020] Figure 5 This is a rendering of the third embodiment of the fan-shaped suction nozzle with variable air intake position according to the present invention.

[0021] In the picture:

[0022] 1-Orifice plate; 2-Orifice plate bushing; 3-Center body; 4-Nozzle bushing; 5-Nozzle; 6-Inlet hole; 7-Throat; 8-Diffuser section; 9-Mixing chamber; 10-Through hole; 11-Plug nut; 12-Plug screw; 13-Channel; 14-Slider; 15-Suction hole; 16-Tuning rod. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] like Figure 1 As shown, the variable air intake position fan-shaped suction nozzle of the present invention includes an orifice plate 1, a central body 3, and a nozzle 5. The orifice plate 1 is disposed at the inlet end of the central body 3 via an orifice plate bushing 2, and the nozzle 5 is disposed at the outlet end of the central body 3 via a nozzle bushing 4. The orifice plate 1 and the orifice plate bushing 3, as well as the nozzle 5 and the nozzle bushing 4, can all be connected to the central body 3 by means of threads. The orifice plate 1 is provided with a liquid inlet hole 6, which is connected to the inlet end of a throat 7 located inside the central body 3. The diameter of the liquid inlet hole 6 is variable, and the diameter variation range of the liquid inlet hole 6 is 0.5 to 1 mm. The diameter ratio of the throat 7 to the liquid inlet hole 6 is between 1.5 and 2.5. The throat 7 is connected to the nozzle 5 through a mixing chamber 9 disposed at the outlet end of the diffuser section 8. The central body 3 is characterized by having an adjustable suction device on its side wall for adjusting the suction position under different scenarios, thereby achieving controllable adjustment of the droplet gas content.

[0027] Example 1:

[0028] like Figure 1As shown, the orifice plate 1 has a liquid inlet 6 at its center, and the diameter of the liquid inlet 6 is variable; in this embodiment, 0.5 mm is selected. The central body 3 contains a throat 7, a diffuser section 8, and a mixing chamber 9, wherein the diameter of the throat 7 is variable; in this embodiment, 2 mm is selected. Figure 1 and 2 As shown, a through hole 10 is provided on the side wall of the throat 7 segment of the central body 3. The ratio of the diameter of the through hole 10 to the diameter of the throat 7 is between 0.3 and 0.8. They are distributed at 3 to 5 different height positions, and their position distribution range is limited to the uppermost and lowermost ends of the throat 7. At the same height position, the number of through holes 10 is between 1 and 4.

[0029] External threads are provided on the outer wall of the central body 3, and internal threads are provided on the inner wall of the plugging nut 11. By rotating the plugging nut 11, its relative position with the central body 3 is changed. To avoid compromising airtightness during threaded connection, sealing tape is wrapped around both ends of the plugging nut 11 to achieve a seal. In this embodiment, the length of the plugging nut 11 is selected to be 4mm, and one plugging nut 11 is arranged corresponding to the position of each through hole 10. In this embodiment, the diameter of the through hole 10 is selected to be 1-2mm, and its positions are distributed at 5 different heights of the central body. The number of through holes 10 at the same height is selected to be 1. The diameter of the through holes 10 is different at different heights. In Example 1, the diameter of the through holes 10 decreases from top to bottom. Initially, all plugging nuts 11 are moved to the position corresponding to the through holes 10, that is, blocking the service air inlet through holes 10. When a larger air intake is required, rotate and remove the uppermost plug nut 11; when a smaller air intake is required, rotate and remove the lowermost plug nut 11; when a medium air intake is required, rotate and remove the middle plug nut 11.

[0030] Example 2:

[0031] like Figure 3 As shown, the difference between Embodiment 2 and Embodiment 1 lies in the use of plugging screws 12 to close or open the through hole 10. An internal thread is provided in the through hole 10, and an external thread is provided on the plugging screw 12. Initially, all plugging screws 12 are screwed into the corresponding through holes 10. When a larger air intake is required, the uppermost plugging screw 12 is unscrewed; when a smaller air intake is required, the lowermost plugging screw 12 is unscrewed; when a medium air intake is required, the middle plugging screw 12 is unscrewed. To ensure airtightness during threaded connections, airtight tape is wrapped around the plugging screw 12 to achieve a seal.

[0032] Example 3:

[0033] like Figure 4 and 5As shown, the difference between Embodiment 3 and Embodiment 1 is that a channel 13 is formed on the side wall of the central body 3. The thickness of the channel 13 is 0.5 to 0.7 times the thickness of the side wall of the throat 7; the length of the channel 13 is 0.6 to 0.8 times the length of the throat 7; the throat 7 and the channel 13 are connected by a rectangular channel set in the middle of the channel 13. The length of the channel 13 is greater than the length of the rectangular channel. The rectangular channel connects the channel 13 and the throat 7 respectively; a slider 14 is set in the channel 13. The slider 14 is equipped with an air intake hole 15 and a lever 16. The slider 14 blocks the rectangular channel. When the liquid passes through the throat 7, a negative pressure effect is generated, and the gas can only enter the throat through the air intake hole 15 on the slider 14; by moving the lever 16, the slider 14 moves up and down in the channel 13 to change the position of the air intake hole 15, so as to achieve the effect of adjusting the spray characteristics.

[0034] When in use, if a moderate amount of air is required, the lever 16 is moved to slide the slider 14 to the middle position of the channel 13. At this time, since it is in the center of the throat 7, the air intake of the air intake hole 15 is moderate. When a larger amount of air is required, the lever 16 is moved to slide the slider 14 to the top of the channel 13. At this time, since it is in the top of the throat 7, the air intake of the air intake hole 15 increases. When a smaller amount of air is required, the lever 16 is moved to slide the slider 14 to the bottom of the channel 13. At this time, since it is in the top of the throat 7, the air intake of the air intake hole 15 decreases.

[0035] Sealing gaskets are provided between the orifice plate 1 and the central body 3, and between the nozzle 5 and the central body 3, to ensure the airtightness of the nozzle. The ratio of the diameter of the through hole to the diameter of the throat tube is between 0.3 and 0.8, which ensures that gas is drawn into the throat tube under atmospheric pressure. The downward outward expansion angle of the diffuser section ranges from 15° to 30°. The inlet of the mixing chamber is connected to the diffuser section, and the outlet of the mixing chamber is connected to the nozzle. The ratio of the length to the diameter of the mixing chamber ranges from 3 to 5. The bottom of the internal channel of the nozzle is hemispherical, and there is a wedge-shaped opening at the end of the nozzle. The opening angle of the wedge-shaped opening ranges from 10° to 25°.

[0036] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0037] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fan-shaped suction nozzle with variable air intake position, characterized in that, The device includes an orifice plate (1), a central body (3), and a nozzle (5). The orifice plate (1) is installed at the inlet end of the central body (3) through an orifice plate bushing (2), and the nozzle (5) is installed at the outlet end of the central body (3) through a nozzle bushing (4). The orifice plate (1) is provided with a liquid inlet hole (6), which is connected to the inlet end of a throat tube (7) located inside the central body (3). The throat tube (7) is connected to the nozzle (5) through a mixing chamber (9) provided at the outlet end of the diffuser section (8). An adjustable air intake device is provided on the side wall of the central body (3) to change the air intake position. The adjustable suction device includes several through holes (10) and several sealing devices that cooperate with the through holes (10). The through holes (10) are set at different height positions on the side wall of the central body (3), and at least one through hole (10) is set at each height position. The through holes (10) are connected to the throat tube (7). The diameter of the through holes (10) is smaller than the diameter of the throat tube (7), and is used to draw gas into the throat tube (7) during the injection process.

2. The fan-shaped suction nozzle with variable air intake position according to claim 1, characterized in that, The sealing device is a plugging nut (11). The thickness of the plugging nut (11) is greater than the diameter of the through hole (10). An external thread is provided on the side wall of the central body (3). The plugging nut (11) is threaded with the side wall of the central body (3). By rotating the plugging nut (11), the through hole (10) can be connected to or blocked from the outside atmosphere.

3. The fan-shaped suction nozzle with variable air intake position according to claim 1, characterized in that, The sealing device is a plugging screw (12), which has a corresponding internal thread in each through hole (10). The plugging screw (12) is connected to the through hole (10). By installing or removing the plugging screw (12), the through hole (10) can be connected to or blocked from the outside atmosphere.

4. The fan-shaped suction nozzle with variable air intake position according to any one of claims 1-3, characterized in that, A sealing gasket is provided between the orifice plate (1) and the center body (3) and between the nozzle (5) and the center body (3).

5. The fan-shaped suction nozzle with variable air intake position according to any one of claims 1-3, characterized in that, The ratio of the diameter of the through hole (10) to the diameter of the throat (7) is between 0.3 and 0.

8.

6. A fan-shaped suction nozzle with variable air intake position, characterized in that, The device includes an orifice plate (1), a central body (3), and a nozzle (5). The orifice plate (1) is installed at the inlet end of the central body (3) through an orifice plate bushing (2), and the nozzle (5) is installed at the outlet end of the central body (3) through a nozzle bushing (4). The orifice plate (1) is provided with a liquid inlet hole (6), which is connected to the inlet end of a throat tube (7) located inside the central body (3). The throat tube (7) is connected to the nozzle (5) through a mixing chamber (9) provided at the outlet end of the diffuser section (8). An adjustable air intake device is provided on the side wall of the central body (3) to change the air intake position. The adjustable suction device includes a channel (13), which is set on the side wall of the central body (3). The throat tube (7) and the channel (13) are connected by a rectangular channel set in the middle of the channel (13). A slider (14) is set in the channel (13). The slider (14) is provided with a suction hole (15) and a lever (16). The rectangular channel is blocked by the slider (14). The slider (14) is driven to move up and down in the channel (13) by the lever (16) to change the position of the suction hole (15).

7. The fan-shaped suction nozzle with variable air intake position according to claim 6, characterized in that, The thickness of the channel (13) is 0.5 to 0.7 times the thickness of the sidewall of the throat (7); the length of the channel (13) is 0.6 to 0.8 times the length of the throat (7).

8. The fan-shaped suction nozzle with variable air intake position according to any one of claims 6-7, characterized in that, A sealing gasket is provided between the orifice plate (1) and the center body (3) and between the nozzle (5) and the center body (3).

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