A nozzle with automatic switching of flow channels

Abstract

The present application relates to a kind of flow channel automatic switching spray head, including spray head body and spray head shell, spray head shell includes first spray head shell and second spray head shell, first spray head shell is equipped with conical nozzle, second spray head shell is equipped with spray water outlet and refractive wall surface;Spray head body is nested in the inside of first spray head shell and second spray head shell, the inner surface of first spray head shell and the outer wall surface of spray head between form guiding groove, guiding groove is communicated with conical nozzle;Spray head body is equipped with first flow channel cavity and second flow channel cavity that are communicated together inside, second flow channel cavity and guiding groove are communicated by guiding hole, second flow channel cavity is communicated with spray water outlet, the inner wall of second flow channel cavity is installed with inclined spring, spring and guiding inclined groove, cover sheet is installed on inclined spring, circular baffle is installed on spring, and through hole is opened on circular baffle.The present application can intelligently realize the function of root irrigation, branch and leaf pesticide application, and is mainly suitable for the demand of fruit tree class crop irrigation and fertilization.

Description

TECHNICAL FIELD

[0001] The present application relates to a nozzle, in particular to a nozzle capable of automatically switching flow channel to realize water irrigation and pesticide application. BACKGROUND

[0002] Water-pesticide integrated technology is an important comprehensive management technology in modern agricultural production process, mainly applied in fruit tree planting. Using water-pesticide integrated system can avoid direct contact with pesticide solution and drifting pesticide mist, reduce the risk of inhaling toxic substances, realize safe pesticide application, and at the same time can improve the quality and efficiency of crops, reduce the amount of fertilizer and pesticide application, and greatly shorten the investment recovery period. It mainly realizes the functions of irrigating the roots of crops and spraying pesticides on branches and leaves in the same system through water scattering and atomization. Micro nozzle is the key equipment in water-pesticide integrated technology. At present, the micro nozzle commonly used for fruit tree crops is centrifugal nozzle, fan-shaped atomizing nozzle, pneumatic electrostatic nozzle, etc. The main problems are that the irrigation and pesticide application flow is unreasonable, the function is single, and the performance requirements of irrigation and pesticide application cannot be met in the same system. SUMMARY

[0003] The purpose of the present application is to provide a nozzle capable of automatically switching flow channel, which realizes the functions of irrigation and pesticide application in the same micro irrigation system, adjusts the irrigation and pesticide application state through water pressure change, and realizes automatic irrigation.

[0004] To achieve the above-mentioned purpose of the application, the technical scheme adopted by the present application is as follows: a nozzle capable of automatically switching flow channel, comprising a nozzle body and a nozzle shell, the nozzle shell comprising a first nozzle shell and a second nozzle shell, a plurality of conical nozzles being arranged on the first nozzle shell, a spray water outlet and a refractive wall being arranged on the second nozzle shell, and the outlet of the conical nozzle being opposite to the refractive wall; the nozzle body being nested in the first nozzle shell and the second nozzle shell, a guide groove being formed between the outer wall of the nozzle and the inner wall of the first nozzle shell, and the guide groove being communicated with the conical nozzle; a first flow channel cavity and a second flow channel cavity being arranged in the nozzle body and communicated with each other, the second flow channel cavity and the guide groove being communicated through a guide hole, the second flow channel cavity being communicated with the spray water outlet, an inclined spring, a spring and a guide inclined chute being respectively fixedly installed on the inner wall of the second flow channel cavity, a cover being fixedly installed on the inclined spring, the cover being located near the guide hole, a circular ring baffle being fixedly installed on the spring, a through hole being formed in the circular ring baffle, and the circular ring baffle being located at the water outlet side of the guide inclined chute.

[0005] In the above-mentioned scheme, a plurality of water outlets of spiral flow channels are arranged on the guide inclined chute.

[0006] The second nozzle shell is provided with an internal thread, the nozzle body outer wall surface is provided with an external thread A, and the nozzle body and the second nozzle shell are fixedly connected through cooperation of the external thread A and the internal thread.

[0007] The nozzle body outer wall surface is provided with a pedestal, the nozzle body is fixed together with the first nozzle shell through the pedestal, a cylindrical spray hole is formed in the pedestal, the cylindrical spray hole and the flow channel of the conical nozzle are communicated together, the conical nozzle is coaxial with the cylindrical spray hole, and the inlet diameter of the lower end of the conical nozzle is equal to the diameter of the cylindrical spray hole.

[0008] The flow channel cross section of the spray water outlet includes an inner taper cross section, a rectangular cross section and an outer taper cross section in sequence, the inner taper cross section and the outer taper cross section are symmetrically distributed, the taper angle of the inner taper cross section and the taper angle of the outer taper cross section are equal, and the range of alpha and beta is .

[0009] The included angle between the flow guide hole and the horizontal plane is . .

[0010] The radius of the through hole on the circular baffle is smaller than the minimum distance from the center line of the nozzle body to the slot hole on the flow guide groove, and smaller than the maximum distance from the center line of the nozzle body to the water outlet hole on the flow guide inclined groove.

[0011] The nozzle body, the first nozzle shell and the second nozzle shell are provided with an O-shaped sealing ring.

[0012] The nozzle of the application can automatically switch the working state through water pressure change, realize crop leaf pesticide application under medium and high pressure, and crop root irrigation under low pressure, improve the utilization rate of pesticides, reduce the cost and harm to the environment. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a pesticide application working mode state diagram.

[0014] Figure 2 It is a water irrigation working mode state diagram.

[0015] Figure 3 It is a cross-sectional view of A-A.

[0016] Figure 4 It is a nozzle shell schematic diagram.

[0017] Figure 5 It is a nozzle body schematic diagram.

[0018] Fig. 1: 1 - O-ring A, 2 - flow guide hole, 3 - flow guide groove, 4 - first conical nozzle, 5 - flow guide chute, 6 - circular ring baffle, 7 - spray water outlet, 8 - spring, 9 - rotating acceleration chamber, 10 - nozzle shell, 10-1 - first nozzle shell, 10-2 - second nozzle shell, 11 - refractive wall, 12 - cover sheet, 13 - inclined spring, 14 - nozzle body, 14-1 - first flow channel cavity, 14-2 - second flow channel cavity, 14-3 - pedestal, 15 - internal thread, 16 - external thread A, 17 - external thread B, 18 - O-ring B, 19 - cylindrical injection hole. DETAILED DESCRIPTION

[0019] The specific implementation method of the present application is further described below in conjunction with the drawings, but the protection scope of the present application is not limited thereto.

[0020] As Figures 1 to 5As shown, the embodiment provides a flow channel automatic switching nozzle, which comprises a nozzle body 14 and a nozzle shell 10, the nozzle shell 10 comprises a first nozzle shell 10-1 and a second nozzle shell 10-2, and the second nozzle shell 10-2 is provided with internal threads 15. The first nozzle shell 10-1 is provided with a plurality of conical nozzles 4, and the second nozzle shell 10-2 is provided with a spray water outlet 7 and a refractive wall 11. The outer wall of the nozzle body 14 is provided with a seat 14-3, the nozzle body 14 is fixed with the inner wall of the first nozzle shell 10-1 through the seat 14-3, a cylindrical spray hole 19 is formed in the seat 14-3, the cylindrical spray hole 19 and the flow channel of the conical nozzle 4 are communicated together, the conical nozzle 4 is coaxial with the cylindrical spray hole 19, the inlet diameter of the lower end of the conical nozzle 4 is equal to the diameter of the cylindrical spray hole 19, and the outlet of the conical nozzle 4 faces the refractive wall 11. The nozzle body 14 is nested in the first nozzle shell 10-1 and the second nozzle shell 10-2, the outer wall of the nozzle body 14 is provided with external threads A16, and the nozzle body 14 and the second nozzle shell 10-2 are fixedly connected through the cooperation of the external threads A16 and the internal threads 15. O-shaped sealing rings A1 are arranged between the nozzle body 14 and the first nozzle shell 10-1, and O-shaped sealing rings B18 are arranged between the nozzle body 14 and the second nozzle shell 10-2. The outer wall of the nozzle body 14 and the inner wall of the first nozzle shell 10-1 form a flow guide groove 3, and the flow guide groove 3 is communicated with the conical nozzle 4. The first flow channel cavity 14-1 and the second flow channel cavity 14-2 are arranged in the nozzle body 14 and communicated with each other, the second flow channel cavity 14-2 and the flow guide groove 3 are communicated through a flow guide hole 2, the second flow channel cavity 14-2 is communicated with the spray water outlet 7, and the inner wall of the second flow channel cavity 14-2 is fixedly installed with an inclined spring 13, a spring 8 and a flow guide inclined chute 5, respectively. The cover sheet 12 is fixedly installed on the inclined spring 13 and located near the flow guide hole 2. The circular ring baffle 6 is fixedly installed on the spring 8, and a through hole is formed in the circular ring baffle 6. The circular ring baffle 6 is located on the water outlet side of the flow guide inclined chute 5, and the flow guide inclined chute 5 is provided with a plurality of water outlet openings of spiral flow channels. The radius of the through hole in the circular ring baffle 6 is smaller than the minimum distance between the groove hole in the flow guide groove 3 and the center line of the nozzle body 14, and smaller than the maximum distance between the water outlet hole in the flow guide inclined chute 5 and the center line of the nozzle body 14. When the spring 8 is in a stretched state, the circular ring baffle 6 can completely block the flow guide inclined chute 5.

[0021] In the embodiment, the flow channel cross section of the spray water outlet 7 includes an inner tapered cross section, a rectangular cross section and an outer tapered cross section in sequence, the inner tapered cross section and the outer tapered cross section are symmetrically distributed, the taper angle of the inner tapered cross section and the taper angle of the outer tapered cross section are equal, the range of the taper angle is The angle between the flow guide hole (2) and the horizontal plane ranges from .

[0022] As shown in Figure 1 , the present application is in the state of spraying pesticide, the water pressure is large, the inclined spring 13 is in the stretched state, the cover sheet 12 blocks the flow guide hole 2, and the water flow cannot flow out of the flow guide hole 2. At the same time, the spring 8 is in the compressed state due to the excessive water pressure, the circular ring baffle 6 is compressed with the spring 8, the flow guide inclined chute 5 is opened, the water flow passes through the nozzle body 14, generates a rotational flow after passing through the flow guide inclined chute 5, further rotates and accelerates after flowing into the rotating acceleration chamber 9, and is sprayed out of the water outlet 7.

[0023] As shown in Figure 2 , the present application realizes the spraying irrigation working mode, the flow guide inclined chute 5 is blocked by the circular ring cover sheet, the flow guide hole 2 is in the open state, the water flow flows into the nozzle body 14, does not pass through the flow guide inclined chute 5, flows into the flow guide groove 3 through the flow guide hole 2, rotates and accelerates, and is sprayed out of the two side tapered nozzles 4, impinges the refracting surface 11 of the nozzle cap 10, and flows out from both sides.

[0024] When the nozzle is in the pesticide application mode, the water pressure is large, the spring near the flow guide hole is in the stretched state, the cover sheet connected with the spring blocks the flow guide hole, the top spring is in the compressed state, the flow guide inclined chute is opened, the spray water outlet is opened, the water flow flows into the nozzle body, passes through the flow guide inclined chute, rotates and flows into the rotating acceleration chamber formed between the nozzle body and the nozzle cap, further rotates and accelerates in the acceleration chamber, and is sprayed out of the spray water outlet to form small fog droplets attached to the plants. When the nozzle is switched to the irrigation state, the water pressure is small at this time, the top spring cannot be deformed due to the small water flow pressure, returns to the original position, the flow guide inclined chute is blocked, the spring near the flow guide hole returns to the original position, and thus the cover sheet returns to the original position. At this time, the water flow flows into the flow guide groove through the flow guide hole, rotates and accelerates, is sprayed out of the two side nozzles, impinges the refracting surface at the bottom end of the nozzle cap, and is sprayed out from both sides to irrigate the plant roots.

[0025] The above is a preferred embodiment of the present application, and the present application is not limited to the above-described embodiments. Any improvement, replacement or modification of the shape, structure and features within the scope of the claims of the present application without departing from the essential content of the present application shall fall within the protection scope of the present application.

Claims

1. A nozzle for automatic switching of flow channels, comprising a nozzle body (14) and a nozzle housing (10), characterized in that The shower head shell (10) comprises a first shower head shell (10-1) and a second shower head shell (10-2), the first shower head shell (10-1) is provided with a plurality of conical nozzles (4), the second shower head shell (10-2) is provided with a spray water outlet (7) and a refractive wall (11), the shower head body (14) is nested in the first shower head shell (10-1) and the second shower head shell (10-2), the outer wall of the shower head body (14) and the inner wall of the first shower head shell (10-1) form a flow guide groove (3), the flow guide groove (3) is communicated with the conical nozzle (4); the first flow channel cavity (14-1) and the second flow channel cavity (14-2) are arranged in the shower head body (14) and are communicated with each other, the second flow channel cavity (14-2) and the flow guide groove (3) are communicated through a flow guide hole (2), the second flow channel cavity (14-2) is communicated with the spray water outlet (7), the inner wall of the second flow channel cavity (14-2) is respectively fixedly provided with an inclined spring (13), a spring (8) and a flow guide inclined chute (5), the inclined spring (13) is fixedly provided with a cover sheet (12), the cover sheet (12) is located near the flow guide hole (2), the spring (8) is fixedly provided with a circular ring baffle (6), the circular ring baffle (6) is provided with a through hole, the circular ring baffle (6) is located at the water outlet side of the flow guide inclined chute (5), and the circular ring baffle (6) can completely block the flow guide inclined chute (5).

2. The flow channel automatic switching showerhead of claim 1, wherein The outlet of the conical nozzle (4) is opposite to the refractive wall (11).

3. The flow channel automatic switching showerhead of claim 1, wherein The flow guide inclined chute (5) is provided with a plurality of water outlet openings of spiral flow channels.

4. The flow channel automatic switching showerhead of claim 1, wherein The second shower head shell (10-2) is provided with an internal thread (15), the outer wall of the shower head body (14) is provided with an external thread A (16), and the shower head body (14) and the second shower head shell (10-2) are fixedly connected through cooperation of the external thread A (16) and the internal thread (15).

5. The flow channel automatic switching showerhead of claim 1, wherein The outer wall of the shower head body (14) is provided with a pedestal (14-3), the shower head body (14) is fixedly connected with the inner wall of the first shower head shell (10-1) through the pedestal (14-3), the pedestal (14-3) is provided with a cylindrical injection hole (19), the cylindrical injection hole (19) and the flow channel of the conical nozzle (4) are communicated together, the conical nozzle (4) is coaxial with the cylindrical injection hole (19), and the inlet diameter of the lower end of the conical nozzle (4) is equal to the diameter of the cylindrical injection hole (19).

6. The flow channel automatic switching showerhead of claim 1, wherein The flow passage cross section of the water spray outlet (7) successively comprises an inner tapered cross section, a rectangular cross section and an outer tapered cross section, the inner tapered cross section and the outer tapered cross section are symmetrically distributed, the taper angle α of the inner tapered cross section and the taper angle β of the outer tapered cross section are equal in angle, the range of α and β is .

7. The flow channel automatic switching showerhead of claim 1, wherein The included angle θ between the flow guide hole (2) and the horizontal plane ranges from 30° to 45°.

8. The flow channel automatic switching showerhead of claim 1, wherein The radius of the through hole in the circular ring baffle (6) is smaller than the minimum distance between the groove hole in the flow guide groove (3) and the center line of the shower head body (14), and smaller than the maximum distance between the water outlet hole in the flow guide inclined chute (5) and the center line of the shower head body (14).

9. The flow channel automatic switching showerhead of claim 1, wherein An O-shaped sealing ring A (1) is arranged between the shower head body (14) and the first shower head shell (10-1), and an O-shaped sealing ring B (18) is arranged between the shower head body (14) and the second shower head shell (10-2).

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