A bionic multi-dimensional spray nozzle and preparation method thereof

Abstract

A bionic multi-dimensional spray nozzle and a preparation method thereof, the nozzle comprises a first spray mechanism, the first spray mechanism comprises: a plurality of first nozzles, each of which comprises a first ejection body, a spray pipe and a plurality of bionic style nozzles, the first ejection body is mounted at the top of the spray pipe, the spray pipe is provided with at least one bionic arc; a plurality of bionic style nozzles are arranged on the first ejection body and communicated with the spray pipe, and a plurality of pores are arranged in an array on each bionic style nozzle; and a first liquid collecting component, comprising a first shell and a bionic spiral blade coaxially arranged therein; a first bionic microstructure in the form of a scale is arranged on the inner wall of the first shell; the bottom end of the spray pipe is mounted on the first shell and communicated with the internal cavity of the first shell. The present invention can spray at multiple angles and directions, ensuring all-round coverage spraying, and has a wide range of applications. The present invention also provides a preparation method for a bionic multi-dimensional spray nozzle.

Description

Technical Field

[0001] The invention relates to a nozzle structure, in particular to a bionic multi-dimensional spray nozzle with a bionic passion flower structure suitable for agriculture, animal husbandry, gardening and the like, and a preparation method thereof. Background Art

[0002] In modern agriculture and animal husbandry, the demand for nozzle systems is growing, especially in application scenarios such as agricultural irrigation, landscaping, and livestock and poultry disinfection. Existing nozzle structures often have problems such as uneven spraying, low efficiency, and poor adaptability. In particular, in complex terrain or where high spraying uniformity is required, the existing technology is difficult to meet the requirements. Therefore, the art is in urgent need of an atomizing nozzle that sprays evenly and is easy to adjust and maintain.

[0003] In the disinfection of livestock and poultry, spray disinfection equipment needs to have efficient and uniform spraying capabilities to ensure that the disinfectant can cover every corner, thereby reducing the possibility of outbreaks and group transmission, which is particularly important for the immune prevention of livestock and poultry. Therefore, how to achieve high efficiency, uniform spraying and adaptive ability to environmental changes of the nozzle is also a problem to be solved in this field. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a bionic multi-dimensional spray nozzle and a preparation method thereof in view of the above-mentioned defects of the prior art, so as to solve the problems of nozzle clogging, uneven spraying, low efficiency and poor adaptability in irrigation spraying such as agriculture, animal husbandry and livestock and poultry disinfection.

[0005] In order to achieve the above object, the present invention provides a bionic multi-dimensional spray nozzle, which includes a first spraying mechanism, wherein the first spraying mechanism includes:

[0006] A plurality of first nozzles, each of which comprises a first injection body, a spray pipe and a plurality of bionic style nozzles, the first injection body is mounted on the top of the spray pipe, the spray pipe is provided with at least one bionic arc; a plurality of bionic style nozzles are arranged on the first injection body and connected with the spray pipe, and a plurality of pores are arranged in an array on each of the bionic style nozzles; and

[0007] The first liquid collecting component includes a first shell and a bionic spiral blade, wherein the bionic spiral blade is arranged in the first shell and is coaxial with the first shell; a scaly first bionic microstructure is arranged on the inner wall of the first shell; the bottom end of the spray pipe is installed on the first shell and is connected to the internal cavity of the first shell.

[0008] In the above-mentioned bionic multi-dimensional spray nozzle, the helical angle of the bionic spiral blade is 15° to 45°, and the ratio of the pitch to the blade diameter of the bionic spiral blade is 1:1 to 2:1.

[0009] The above-mentioned bionic multi-dimensional spray nozzle, wherein, further comprises a second spraying mechanism, wherein the second spraying mechanism comprises:

[0010] A plurality of second nozzles, each of which comprises a second nozzle body and a guide tube, a plurality of second nozzles of different diameters are arranged on the second nozzle, the second nozzle body is installed at the end of the guide tube, a guide hole and a guide chute are arranged in the guide tube, and the guide chute is arranged corresponding to the second nozzle; and

[0011] The second liquid collecting component includes a second shell, the top end of the second shell is connected to the bottom end of the first shell, the multiple second nozzles are evenly distributed at the connection between the first shell and the second shell, and the guide holes are respectively connected to the second nozzle and the inner cavity of the first shell and the second shell, and a hedgehog-shaped second bionic microstructure is arranged on the inner wall of the second shell.

[0012] The above-mentioned bionic multi-dimensional spray nozzle, wherein, further comprises a third spraying mechanism, wherein the third spraying mechanism comprises:

[0013] A plurality of third nozzles, comprising a hose housing and a flexible nozzle, wherein a distal end of the flexible nozzle is connected to the hose housing;

[0014] The third liquid collecting component comprises a third shell, the top end of the third shell is connected to the bottom end of the second shell, the hose shell is installed on the side wall of the third shell, and the flexible nozzle is connected to the inner cavity of the third shell.

[0015] In the above-mentioned bionic multi-dimensional spray nozzle, the second bionic microstructure is prepared by the following method:

[0016] Using a femtosecond laser to perform dot-matrix laser ablation according to the set pattern of the second bionic microstructure to form a microstructure, and adjusting the laser parameter range according to specific needs;

[0017] The laser-ablated microstructure is ultrasonically cleaned using an ethanol solution;

[0018] placing the treated microstructure in a mixed solution of sodium hydroxide and ammonium sulfate in a ratio of 5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1 or 40:1 for chemical oxidation, and standing at room temperature for a set time to form the hedgehog-shaped second bionic microstructure; and

[0019] The prepared hedgehog-shaped second bionic microstructure is washed with deionized water.

[0020] In the above-mentioned bionic multi-dimensional spray nozzle, the surface of the second bionic microstructure is also provided with a super-hydrophobic microstructure, and the surface of the third shell is also provided with the second bionic microstructure and / or the super-hydrophobic microstructure.

[0021] The above-mentioned bionic multi-dimensional spray nozzle, wherein the super-hydrophobic microstructure is prepared by the following method:

[0022] The solution preparation step comprises mixing a polydimethylsiloxane main agent and a curing agent in a ratio of 20:1, 30:1 or 40:1, and stirring at a set temperature to form a PDMS prepolymer solution; vacuuming the PDMS prepolymer solution to remove bubbles, and then adding 20wt%, 30wt%, 40wt%, 50wt% or 60wt% of a toluene solution, and continuing to stir to ensure uniform mixing, to form a PDMS / toluene mixed solution;

[0023] a drying treatment step, wherein the PDMS / toluene mixed solution is evenly spin-coated on the surface of the hedgehog-shaped second bionic microstructure, and a drying treatment is performed after the film thickness is controlled; and

[0024] The surface modification step is to seal the dried hedgehog-shaped second bionic microstructure in a dryer filled with a set amount of 1H,1H,2H,2H-perfluorodeoxytriethoxysilane for surface modification to obtain a super-hydrophobic microstructure on the surface of the hedgehog-shaped second bionic microstructure.

[0025] In the above-mentioned bionic multi-dimensional spray nozzle, a threaded sleeve is provided at the bottom end of the third shell, and a cross filter is provided between the third shell and the threaded sleeve.

[0026] The above-mentioned bionic multi-dimensional spray nozzle, wherein the first shell, the second shell and the third shell are coaxially arranged, and multiple first nozzles, second nozzles and third nozzles are radially arranged on the side walls of the first shell, the second shell and the third shell respectively, and the number of the first nozzles is greater than the number of the second nozzles, which is greater than the number of the third nozzles.

[0027] In the above-mentioned bionic multi-dimensional spray nozzle, the first bionic microstructure is prepared by the following method:

[0028] The step of preparing a silicone scaly protrusion negative template comprises preparing a silicone solution by mixing a silicone main agent and a curing agent in a mass ratio of 1:1, 2:1 or 3:1; pretreating the surface of the scaly protrusion mold; pouring the silicone solution on the surface of the scaly protrusion mold, and performing flexible demoulding of the silicone after curing to obtain a silicone scaly protrusion negative template;

[0029] The mold replication step comprises the following steps: evenly spin-coating a layer of fluorine release agent on the surface of the silicone scale-shaped female template and drying at room temperature; preparing a PDMS prepolymer solution by using a polydimethylsiloxane main agent and a curing agent according to a set mass ratio; pouring the PDMS prepolymer solution after removing bubbles on the silicone scale-shaped female template, and curing and demolding to obtain a bionic scale-shaped film; and

[0030] The step of forming the first scaly bionic microstructure is to coat a layer of PDMS prepolymer solution on the inner surface of the first shell, closely adhere the bionic scaly film to the inner surface of the first shell and quickly dry it to form the first scaly bionic microstructure.

[0031] In order to better achieve the above-mentioned object, the present invention also provides a method for preparing a bionic multi-dimensional spray nozzle, which comprises the following steps:

[0032] The nozzle 3D printing step is to set the printing parameters and 3D model file and input it into the liquid metal 3D printer. The printer will stack the metal material powder layer by layer according to the path after slicing, and use high-energy laser to melt the powder to form various parts of the nozzle;

[0033] The nozzle post-processing step removes the printing support structure around and inside the nozzle, grinds and polishes the nozzle; heat treats the nozzle to eliminate the internal stress generated during the printing process and improve the mechanical properties of the nozzle;

[0034] The steps of preparing the internal microstructure of the nozzle further include:

[0035] Preparation of the first biomimetic microstructure:

[0036] The step of preparing a silicone scaly protrusion negative template comprises preparing a silicone solution by mixing a silicone main agent and a curing agent in a mass ratio of 1:1, 2:1 or 3:1; pretreating the surface of the scaly protrusion mold; pouring the silicone solution on the surface of the scaly protrusion mold, and performing flexible demoulding of the silicone after curing to obtain a silicone scaly protrusion negative template;

[0037] The mold replication step comprises the following steps: evenly spin-coating a layer of fluorine release agent on the surface of the silicone scale-shaped female template and drying at room temperature; preparing a PDMS prepolymer solution by using a polydimethylsiloxane main agent and a curing agent according to a set mass ratio; pouring the PDMS prepolymer solution after removing bubbles on the silicone scale-shaped female template, and curing and demolding to obtain a bionic scale-shaped film; and

[0038] The step of forming a first scaly bionic microstructure comprises coating a layer of PDMS prepolymer solution on the inner surface of the first shell, closely attaching the bionic scaly film to the inner surface of the first shell and rapidly drying the film to form the first scaly bionic microstructure;

[0039] Preparation of the second bionic microstructure:

[0040] Using a femtosecond laser to perform dot-matrix laser ablation according to the set pattern of the second bionic microstructure to form a microstructure, and adjusting the laser parameter range according to specific needs;

[0041] The laser-ablated microstructure is ultrasonically cleaned using an ethanol solution;

[0042] placing the treated microstructure in a mixed solution of sodium hydroxide and ammonium sulfate in a ratio of 5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1 or 40:1 for chemical oxidation, and standing at room temperature for a set time to form the hedgehog-shaped second bionic microstructure; and

[0043] Washing the prepared hedgehog-shaped second bionic microstructure with deionized water;

[0044] Preparation of superhydrophobic microstructures:

[0045] The solution preparation step comprises mixing a polydimethylsiloxane main agent and a curing agent in a ratio of 20:1, 30:1 or 40:1, and stirring at a set temperature to form a PDMS prepolymer solution; vacuuming the PDMS prepolymer solution to remove bubbles, and then adding 20wt%, 30wt%, 40wt%, 50wt% or 60wt% of a toluene solution, and continuing to stir to ensure uniform mixing, to form a PDMS / toluene mixed solution;

[0046] a drying treatment step, wherein the PDMS / toluene mixed solution is evenly spin-coated on the surface of the hedgehog-shaped second bionic microstructure, and a drying treatment is performed after the film thickness is controlled; and

[0047] The surface modification step is to seal the dried hedgehog-shaped second bionic microstructure in a dryer filled with a set amount of 1H,1H,2H,2H-perfluorodeoxytriethoxysilane for surface modification to obtain a super-hydrophobic microstructure on the surface of the hedgehog-shaped second bionic microstructure.

[0048] The technical effects of the present invention are:

[0049] The spray nozzle of the present invention increases the contact area between the fluid and the surface through the multi-petal structure and surface microstructure texture of the bionic passion flower, ensures all-round coverage of the spraying process, realizes spray effects at different angles and in multiple directions, and has a wide range of applications; the surface of the internal cavity of the nozzle is provided with a scaly structure and a multi-level super-hydrophobic structure, and is provided with a bionic snail shell spiral blade, the spiral angle is between 15° and 45°, and the ratio of the pitch to its diameter is between 1:1 and 2:1, which increases the uniformity and stability of liquid flow, is beneficial to the directional flow, self-cleaning and impurity filtering of the liquid, and reduces the maintenance requirements; one layer of the nozzle adopts a corrosion-resistant, wear-resistant, detachable flexible hose, the length and shape of which can be adjusted according to actual needs, which increases environmental adaptability, fixed-point spraying and potential utilization, is beneficial to cleaning and maintenance, and prolongs the service life of the nozzle.

[0050] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0052] Figure 2 for Figure 1 Bottom view of

[0053] Figure 3 is a cross-sectional view of an embodiment of the present invention;

[0054] Figure 4 This is a schematic diagram of the structure of a first nozzle according to an embodiment of the present invention;

[0055] Figure 5 A partial enlarged view of the inner surface of the first liquid collecting component according to an embodiment of the present invention;

[0056] Figure 6 This is a partial enlarged view of the inner surfaces of the second and third liquid collecting components according to an embodiment of the present invention.

[0057] Among them, the reference numerals

[0058] 1First spraying mechanism

[0059] 11. First liquid collecting component

[0060] 111 First Shell

[0061] 112 Bionic spiral blade

[0062] 113 The first bionic microstructure

[0063] 12. First nozzle

[0064] 121 first jet

[0065] 122 Bionic Style Nozzle

[0066] 123 Pore

[0067] 124 Spray pipe

[0068] 2 Second spraying mechanism

[0069] 21 Second liquid collecting component

[0070] 211 Second Shell

[0071] 212 Second Bionic Microstructure

[0072] 213 Superhydrophobic microstructure

[0073] 22 Second nozzle

[0074] 221 Second jet

[0075] 222 Second Nozzle

[0076] 223 diversion tube

[0077] 224 diversion holes

[0078] 225 diversion chute

[0079] 3Third spraying mechanism

[0080] 31 The third liquid collecting component

[0081] 311 Third Shell

[0082] 32 The third nozzle

[0083] 321 hose housing

[0084] 322 Flexible Nozzle

[0085] 4 Cross filter

[0086] 5 threaded sleeve DETAILED DESCRIPTION

[0087] The structural principle and working principle of the present invention are described in detail below in conjunction with the accompanying drawings:

[0088] See also Figure 1-Figure 4 , Figure 1 is a schematic structural diagram of an embodiment of the present invention, Figure 2 for Figure 1 Bottom view of Figure 3 is a cross-sectional view of an embodiment of the present invention, Figure 4The schematic diagram of the structure of the first nozzle 12 of an embodiment of the present invention. The bionic multi-dimensional spray nozzle of the present invention increases the contact area between the fluid and the surface by using the multi-petal structure and surface microstructure texture of the bionic passion flower, ensures all-round coverage of the spraying process, and realizes the spraying effect at different angles and in multiple directions, including a first spraying mechanism 1, the first spraying mechanism 1 includes: a plurality of first nozzles 12, each of the first nozzles 12 includes a first ejector 121, a spray pipe 124 and a plurality of bionic style nozzles 122, the first ejector 121 is installed at the top of the spray pipe 124, and the spray pipe 124 is provided with at least one bionic arc; a plurality of bionic style nozzles 122 is arranged on the first jet body 121 and is connected with the spray pipe 124, and each of the bionic style nozzles 122 is provided with a plurality of pores 123 in an array; and a first liquid collecting component 11, comprising a first shell 111 and a bionic spiral blade 112, the bionic spiral blade 112 is arranged in the first shell 111 and is coaxial with the first shell 111; a scaly first bionic microstructure 113 is arranged on the inner wall of the first shell 111; the bottom end of the spray pipe 124 is installed on the first shell 111 and is connected with the internal cavity flow channel of the first shell 111.

[0089] Among them, the spiral angle of the bionic spiral blade 112 is preferably 15° to 45°, and the pitch to blade diameter ratio of the bionic spiral blade 112 is preferably 1:1 to 2:1. The first spraying mechanism 1 may include 15 array-type columnar first jet bodies 121, bionic columnar nozzles 122 and multi-stage pore 123 jet ports, and the difference between adjacent columnar first jet bodies 121 is 24°. The bionic columnar nozzle 122 is a multi-stage pore 123 structure, containing 21 small jet ports, and a single small jet port is provided with 7 micro jet ports, which fully ensures 360° dead angle spraying and realizes the optimization of droplet formation and distribution. The first liquid collecting component 11 is preferably a waist drum-shaped structure, with multiple chambers, layered flow channels, snail shell bionic spiral blades 112 and squamous first bionic microstructures 113 inside, guiding the fluid to flow along a specific path, reducing turbulence and resistance, and improving flow and atomization efficiency and spray uniformity.

[0090] like Figure 4As shown, the bionic style nozzle 122 is connected to the first liquid collecting component 11 through a curved spray pipe 124, and the curvature of the curve can simulate the natural curvature of the passion flower style, and control the spray angle of the first spray body 121 of the first spray mechanism 1 to be within the range of 45° to 90°. The first liquid collecting component 11 is preferably a waist drum-shaped structure of a bionic ovary, and its inner surface is a scaly first bionic microstructure 113, and is provided with a bionic spiral blade 112 simulating a snail shell and different circulation and spray pipes, which are conducive to guiding the flow of the liquid medicine, reducing turbulence and resistance, improving flow efficiency, and ensuring that the coverage range of the liquid medicine and the atomization effect are maximized.

[0091] See also Figure 5 , Figure 5 This is a partial enlarged view of the inner surface of the first liquid collecting component 11 according to an embodiment of the present invention.

[0092] The first scaly bionic microstructure 113 is preferably prepared by the following method:

[0093] The step of preparing a silicone scaly protrusion negative template comprises preparing a silicone solution by mixing a silicone main agent and a curing agent in a mass ratio of 1:1, 2:1 or 3:1; pretreating the surface of the scaly protrusion mold; pouring the silicone solution on the surface of the scaly protrusion mold, and performing flexible demoulding of the silicone after curing to obtain a silicone scaly protrusion negative template;

[0094] The mold replication step comprises the following steps: evenly spin-coating a layer of fluorine release agent on the surface of the silicone scale-shaped female template and drying at room temperature; preparing a PDMS prepolymer solution by using a polydimethylsiloxane main agent and a curing agent according to a set mass ratio; pouring the PDMS prepolymer solution after removing bubbles on the silicone scale-shaped female template, and curing and demolding to obtain a bionic scale-shaped film; and

[0095] The step of forming the first scaly bionic microstructure 113 is to coat a layer of PDMS prepolymer solution on the inner surface of the first shell 111, closely adhere the bionic scaly film to the inner surface of the first shell 111 and quickly dry it to form the first scaly bionic microstructure 113.

[0096] In this embodiment, a second spraying mechanism 2 may also be included, and the second spraying mechanism 2 includes: a plurality of second nozzles 22, each of the second nozzles 22 includes a second injection body 221 and a guide tube 223, a plurality of second nozzles 222 of different diameters are arranged on the second injection body 221, the second injection body 221 is installed at the end of the guide tube 223, and a guide hole 224 and a guide chute 225 are arranged in the guide tube 223, and the guide chute 225 is arranged corresponding to the second nozzle 222; and a second liquid collecting part 21, including a second shell 211, the top end of the second shell 211 is connected to the bottom end of the first shell 111, the plurality of second nozzles 22 are evenly distributed at the connection between the first shell 111 and the second shell 211, and the guide hole 224 is respectively connected to the second nozzle 222 and the inner cavity of the first shell 111 and the second shell 211, and a hedgehog-shaped second bionic microstructure 212 is arranged on the inner wall of the second shell 211.

[0097] The second spray mechanism 2 can be provided with 5 elliptical second nozzles 22, each of which is provided with a second nozzle 222 with different apertures of injection ports, and has a high degree of rotational symmetry, which is easy to mix the airflow and liquid flow. The second spray mechanism 2 is installed between the first liquid collecting component 11 and the second liquid collecting component 21, and has a node advantage (node ​​advantage refers to the structure of simulating the nodes of natural organisms, optimizing the node setting of the nozzle, and drawing on the support and growth characteristics of plant nodes to improve the stability and adaptability of the nozzle. The flow rate and spraying range of the nozzle can be adjusted. By simulating the streamlined structure of the nodes of natural organisms, the node setting of the nozzle can optimize the airflow, reduce energy loss, and improve the aerodynamic performance of the nozzle. The node advantage of the nozzle can reduce the number of components and kinematic pairs, thereby reducing weight and improving reliability), ensuring the structural support capacity and bending resistance. The second spraying mechanism 2 is preferably provided with 5 elliptical second spray bodies 221, each second spray body 221 is provided with a second nozzle 222 of different diameters (the diameter is preferably 2.5mm~3.5mm), and is installed between the first liquid collecting part 11 and the second liquid collecting part 21 through a guide pipe 223. The guide pipe 223 is provided with a guide hole 224 (the diameter is preferably 2mm) and a guide chute 225 (the width is preferably 0.6mm~1mm), and the nozzle elevation angle is preferably between 0° and 15° to ensure that the nozzle's net spraying height and flow rate are maximized.

[0098] Wherein, the second bionic microstructure 212 is preferably prepared by the following method:

[0099] Using a femtosecond laser to perform dot-matrix laser ablation according to the set pattern of the second bionic microstructure 212 to form a microstructure, and adjusting the laser parameter range according to specific needs;

[0100] The laser-ablated microstructure is ultrasonically cleaned using an ethanol solution;

[0101] placing the treated microstructure in a mixed solution of sodium hydroxide and ammonium sulfate in a ratio of 5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1 or 40:1 for chemical oxidation, and standing at room temperature for a set time to form the hedgehog-shaped second bionic microstructure 212; and

[0102] The prepared hedgehog-shaped second bionic microstructure 212 is washed with deionized water.

[0103] In this embodiment, it can further include a third spraying mechanism 3, which includes: a plurality of third nozzles 32, including a hose shell 321 and a flexible nozzle 322, the end of the flexible nozzle 322 is connected to the hose shell 321; a third liquid collecting component 31, including a third shell 311, the top end of the third shell 311 is connected to the bottom end of the second shell 211, and can also be directly connected to the bottom end of the first shell 111, the hose shell 321 is installed on the side wall of the third shell 311, the flexible nozzle 322 is connected to the inner cavity of the third shell 311, and each hose can be adjusted in length and shape according to actual needs to achieve fixed-point spraying.

[0104] The surface of the second bionic microstructure 212 of this embodiment may also be provided with a super-hydrophobic microstructure 213, and the surface of the third housing 311 may also be provided with the second bionic microstructure 212 and / or the super-hydrophobic microstructure 213. The super-hydrophobic microstructure 213 is prepared by the following method:

[0105] The solution preparation step comprises mixing a polydimethylsiloxane main agent and a curing agent in a ratio of 20:1, 30:1 or 40:1, and stirring at a set temperature to form a PDMS prepolymer solution; vacuuming the PDMS prepolymer solution to remove bubbles, and then adding 20wt%, 30wt%, 40wt%, 50wt% or 60wt% of a toluene solution, and continuing to stir to ensure uniform mixing, to form a PDMS / toluene mixed solution;

[0106] a drying step, in which the PDMS / toluene mixture is evenly spin-coated on the surface of the hedgehog-shaped second bionic microstructure 212 and then dried after controlling the film thickness; and

[0107] In the surface modification step, the dried hedgehog-shaped second bionic microstructure 212 is sealed in a dryer filled with a set amount of 1H,1H,2H,2H-perfluorodeoxytriethoxysilane for surface modification to obtain a super-hydrophobic microstructure 213 on the surface of the hedgehog-shaped second bionic microstructure 212.

[0108] The bottom end of the third shell 311 of this embodiment is provided with a threaded sleeve 5, and a cross filter 4 is provided between the third shell 311 and the threaded sleeve 5 to filter large impurities. Preferably, the first shell 111, the second shell 211 and the third shell 311 are coaxially arranged, and a plurality of first nozzles 12, second nozzles 22 and third nozzles 32 are radially arranged on the side walls of the first shell 111, the second shell 211 and the third shell 311, and the number of the first nozzles 12 is greater than the number of the second nozzles 22 and the number of the third nozzles 32.

[0109] The present invention is used to solve the problems of uneven spraying, low efficiency and poor adaptability of the prior art. In a preferred embodiment, the first layer of nozzles is provided with a multi-level pore 123 structure, and different pores 123 have multiple injection ports and a passion flower radial flow channel structure; the first nozzle is connected to the first liquid collecting component 11 below, and the first liquid collecting component 11 includes multiple flow channel structures and a bionic spiral blade 112 simulating a snail shell; each flow channel structure is connected to the elliptical second nozzle, which is provided with injection ports of different sizes as the second injection layer; the cylindrical type connected thereto is the second liquid collecting component 21, and the inner surface of the second liquid collecting component 21 includes a super-hydrophobic microstructure 213; the third nozzle is a flexible hose. The structure has strong adaptability, can quickly atomize liquid, and different liquid flow rates can achieve different levels of liquid spraying; the radial nozzle structure can spray the atomized liquid farther, expanding the disinfection or spraying range; the super-hydrophobic microstructure 213 in the cylindrical liquid collecting area is conducive to solving the problem of spray hole blockage.

[0110] See also Figure 6 , Figure 6 This is a partial enlarged view of the inner surface of the second and third liquid collecting parts 31 of an embodiment of the present invention. The inner surface is a hedgehog-shaped second bionic microstructure 212, and the surface of the second bionic microstructure 212 is covered with a polydimethylsiloxane flexible film with a thickness of 30μm to 50μm. The manufacturing method of the microstructure of this embodiment includes: using a femtosecond laser to scan and ablate according to a graphic dot matrix, the laser power range is preferably 4W to 8W, the scanning speed is preferably 500mm / s to 1000mm / s, and the scanning time is preferably 20s to 25s; then ultrasonically cleaning with an ethanol solution for 3min to 5min, repeating the operation 3 times, and then placing the treated structure in sodium hydroxide (NaOH) and ammonium sulfate ((NH 4 ) 3 SO 4) in a mixed solution (prepared in a ratio of 5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1 or 40:1), and then allowed to stand at room temperature for 5 to 8 minutes to form a hedgehog-shaped second bionic microstructure 212; then the microstructure is washed three times with deionized water, and polydimethylsiloxane and a curing agent are mixed in a ratio of 20:1, 30:1 or 40:1 to form a PDMS prepolymer solution, which is fully stirred at room temperature for 15 minutes and vacuumed for 30 minutes until the bubbles are completely discharged, and then a toluene solution (prepared in a ratio of 20wt%, 30wt%, 40wt%, 50wt% or 60wt% respectively) is added. The method comprises the following steps: first, adding 10 μm of PDMS prepolymer solution to the PDMS prepolymer solution, and stirring for 15 minutes to ensure that the solution is evenly mixed to form a PDMS / toluene mixture; spin coating the PDMS solution on the surface of the microstructure at a speed of 3500 r / min for 0 to 2 minutes, controlling the thickness to be 10 μm, and then placing it in an oven at 80°C for drying. After drying, the microstructure is sealed in a dryer containing 50 μL of 1H, 1H, 2H, 2H-perfluorodeoxytriethoxysilane atmosphere, and placed at 85°C for 2 hours for modification, thereby obtaining a super-hydrophobic microstructure 213 on the inner surface of the second liquid collecting component 21 and / or the third liquid collecting component 31 cavity. The super-hydrophobic microstructure 213 can effectively prevent the accumulation of impurities in the liquid medicine on the inner wall and reduce the blockage caused by dirt in the internal pipe of the cavity. The microstructure manufacturing process and processing parameters can be adjusted according to actual needs.

[0111] The method for preparing the bionic multi-dimensional spray nozzle of the present invention comprises the following steps:

[0112] The nozzle 3D printing step is to set the printing parameters and 3D model file and input it into the liquid metal 3D printer. The printer will stack the metal material powder layer by layer according to the path after slicing, and use high-energy laser to melt the powder to form various parts of the nozzle;

[0113] The nozzle post-processing step removes the printing support structure around and inside the nozzle, grinds and polishes the nozzle; heat treats the nozzle to eliminate the internal stress generated during the printing process and improve the mechanical properties of the nozzle;

[0114] The steps of preparing the internal microstructure of the nozzle further include:

[0115] Preparation of the first bionic microstructure 113:

[0116] The steps of preparing a silicone scaly female template are as follows: a silicone main agent and a curing agent are mixed in a mass ratio of 1:1, 2:1 or 3:1 using a cantilever electric mixer at a stirring speed of 1000 r / min for 10 min to prepare a silicone solution; the surface of the scaly mold is pretreated; the prepared silicone solution is poured on the pretreated surface of the scaly mold, and the scaly mold is placed in a vacuum pump and evacuated for 40 min to remove bubbles inside the solution, so that the silicone solution and the scaly mold are fully filled, and then placed on a heating table for curing, the heating temperature is set to 40°C, the curing time is 5 h, and after the curing is completed, the silicone is flexibly demolded to obtain a silicone scaly female template;

[0117] In the mold replication step, a polydimethylsiloxane (PDMS) main agent and a curing agent are prepared in a mass ratio of 10:1, stirred at room temperature for 15 minutes, and placed in a vacuum pump for evacuation for 40 minutes to remove bubbles in the PDMS prepolymer solution; a layer of fluorine release agent is evenly spin-coated on the surface of the silicone scale-shaped female template, and after drying at room temperature, the PDMS prepolymer solution after the bubbles are removed is poured on the silicone scale-shaped female template, and placed on a 60°C heating table for curing for 3 hours, and then demolded to finally obtain a bionic scale-shaped film; and

[0118] The step of forming the first scaly bionic microstructure 113 is to coat a layer of PDMS prepolymer solution on the inner surface of the first shell 111, and closely attach the bionic scaly film to the PDMS prepolymer solution on the inner surface of the first shell 111 and put it into a drying oven for rapid drying at 80° C. to form the first scaly bionic microstructure 113;

[0119] Among them, the pretreatment of the scale-shaped mold is to first roughen its electrochemical surface and coat it with a layer of titanate, and then perform surface modification (oxidation, fluorination), sputter a 2nm thick chromium layer, and then coat it with epoxy resin and acrylate to ensure chemical corrosion resistance and heat resistance. The mold is then treated with an acid solution, cleaned with deionized water multiple times, and finally vacuum dried below 200°C and kept for later use.

[0120] Preparation of the second bionic microstructure 212:

[0121] A femtosecond laser is used to perform lattice laser ablation according to the set pattern of the second bionic microstructure 212 to form a microstructure, and the set pattern includes but is not limited to the length, period, shape, lattice and other morphologies, and the laser parameter range is adjusted according to specific needs; specifically, it may include: placing the metal sample to be processed in an ethanol solution for ultrasonic cleaning for 10 minutes, and repeating the operation 3 times; performing femtosecond laser processing, and the parameters are set to: a pulse repetition rate of 150kHz, a maximum average power of 20W, a laser power of 4W to 8W, a scanning speed of 500mm / s to 1000mm / s, and a scanning time of 20s to 25s. The specific operation can be adjusted according to actual needs;

[0122] The laser-ablated microstructure is ultrasonically cleaned with an ethanol solution for 3 to 5 minutes, and the operation is repeated 3 times; or toluene and ethanol solutions are respectively ultrasonically cleaned for 10 minutes, and the cleaning is repeated 2 times;

[0123] The treated microstructure is immersed in a mixture of sodium hydroxide (NaOH) and ammonium sulfate (NH 4 ) 3 SO 4 ) in a mixed solution, and then allowed to stand for a set time of 5 to 8 minutes at room temperature to form the hedgehog-shaped second bionic microstructure 212; and

[0124] Washing the prepared hedgehog-shaped second bionic microstructure 212 with deionized water;

[0125] Preparation of superhydrophobic microstructure 213:

[0126] The step of preparing a solution comprises mixing a polydimethylsiloxane (PDMS) main agent and a curing agent in a ratio of 20:1, 30:1 or 40:1, and stirring for 25 to 35 minutes at a set temperature of preferably 25°C to form a PDMS prepolymer solution; vacuuming the PDMS prepolymer solution for 30 minutes to remove bubbles, and then adding 20wt%, 30wt%, 40wt%, 50wt% or 60wt% of a toluene solution, and continuing to stir for 15 minutes to ensure uniform mixing, thereby forming a PDMS / toluene mixed solution;

[0127] Drying treatment step, spin coating the PDMS / toluene mixture at a speed of 3500 r / min for 2 minutes to evenly distribute it on the surface of the hedgehog-shaped second bionic microstructure 212, and the time lasts for 2 minutes, and after controlling the film thickness to 10 μm, vacuum drying or heating curing at 80° C. for 1 hour; and

[0128] In the surface modification treatment step, after drying, the dried hedgehog-shaped second bionic microstructure 212 is sealed in a dryer filled with a set amount of 1H, 1H, 2H, 2H-perfluorodecyl triethoxysilane (preferably 50 μL of FAS-17 (1H, 1H, 2H, 2H-perfluorodecyl triethoxysilane)), and allowed to stand at 85° C. for 2 hours for surface modification, so that its surface is completely hydrophobic, thereby obtaining a super-hydrophobic microstructure 213 on the surface of the hedgehog-shaped second bionic microstructure 212.

[0129] In an optimized embodiment of the present invention, the bionic multi-dimensional spray nozzle can be manufactured by the following steps:

[0130] 1) Select metal material (heat-resistant and corrosion-resistant) powder suitable for 3D printing, such as stainless steel, aluminum or titanium alloy;

[0131] 2) Set the printing parameters in the slicing software, including printing path, layer thickness (0.1mm), printing temperature (such as 200℃ for stainless steel), printing speed, etc., and adjust the filling density to ensure the strength and durability of the nozzle. The filling density is selected between 15% and 30% to ensure the strength of the structure and reduce weight;

[0132] 3) Input the designed 3D model file into the liquid metal 3D printer and start the printing process. The printer will stack the metal powder layer by layer according to the path after slicing, and use high-energy laser to melt the powder to form various parts of the nozzle. During the printing process, ensure the stability of the printing environment to avoid fluctuations in temperature and humidity that affect the printing quality;

[0133] The curvature of the spray pipe 124, i.e., the curvature of the passionflower column, can be calculated according to the following curvature calculation formula:

[0134]

[0135] Where θ is the curvature (radians); F is the applied force; L is the length of the material or structure; E is the elastic modulus; and I is the moment of inertia.

[0136] By determining the elastic modulus, moment of inertia, length and external force of the passion flower column, its curvature can be calculated. It should be noted that this formula is applicable to an idealized physical model and needs to be adjusted and optimized according to specific circumstances in practical applications. For a specific biological structure such as the passion flower column, its biological characteristics and growth conditions also need to be considered;

[0137] 4) After printing, use manual tools such as scissors, tweezers or mechanical methods such as a grinder to remove the support structure around and inside the nozzle. Be careful when removing the support to avoid damage to the nozzle body. Then use sandpaper or polishing wheels of different grits to grind and polish the nozzle, gradually improving the surface finish from coarse to fine to ensure a smooth surface without burrs;

[0138] 5) Heat treatment of the nozzle. The specific process conditions can be determined according to the material properties (stainless steel needs to be solution treated at 1050°C, followed by rapid cooling, and aging treatment at 650°C to 750°C) to eliminate the internal stress generated during the printing process and improve the mechanical properties of the nozzle;

[0139] 6) Anodize the nozzle surface, select the electrolyte as caustic solution (mainly NaOH), the voltage range is 15-25V DC, and the current is 1.0-5.0A / dm2 to improve corrosion resistance. Before anodizing, the stainless steel surface needs to be thoroughly cleaned;

[0140] 7) After the above structure is initially completed, the internal microstructure is manufactured using the following processes:

[0141] In the overall nozzle structure, from top to bottom, the preparation process of the inner surface of the waist-drum-shaped first liquid collecting component 11 is as follows:

[0142] 1) Solution preparation: Prepare a solution of the main agent of silica gel (T600) and the curing agent according to a mass ratio of 1:1, 2:1 or 3:1, and mix them using a cantilever electric stirrer at a stirring speed of 1000r / min and a stirring time of 10min to prepare a silica gel solution;

[0143] 2) Mold treatment: The surface of the scale-shaped mold is pretreated by electrochemically roughening the surface and coating it with a layer of titanate, then surface modification (oxidation, fluorination), sputtering a 2nm thick chromium layer, and then coating epoxy resin and acrylate to ensure chemical corrosion resistance and heat resistance. The mold is then treated with an acid solution, then washed with deionized water for multiple times, and finally vacuum dried below 200°C and stored for later use;

[0144] 3) Pouring: Pour the prepared silicone solution on the pre-treated surface of the squama mold, and place it in a vacuum pump, evacuate for 40 minutes, remove the bubbles inside the solution, and ensure that the silicone solution and the squama mold are fully filled; then put it on a heating table for curing, set the heating temperature to 40°C, and the curing time to 5 hours. After the curing is completed, the silicone is flexibly demolded to obtain a silicone squama negative template;

[0145] 4) Re-molding: Use the scaly female template as a mold, and evenly spin-coat a layer of fluorine release agent on the surface of the silicone scaly female template, dry it at room temperature and set it aside; then, prepare the polydimethylsiloxane (PDMS) main agent and curing agent in a mass ratio of 10:1, stir it at room temperature for 15 minutes, and place it in a vacuum pump for 40 minutes to remove the bubbles in the PDMS prepolymer solution; then, pour the PDMS prepolymer solution after removing the bubbles on the silicone scaly female template, place it on a 60°C heating table for curing for 3 hours, and then demold it to obtain a bionic scaly film;

[0146] 5) Formation of inner surface microstructure: The inner surface of the first liquid collecting component 11 is cleaned with alcohol and deionized water respectively. After drying, a thin layer (not exceeding 500um thickness) of PDMS prepolymer solution is first coated on the inside of the first liquid collecting component 11. The above-mentioned clean bionic scaly film is tightly attached to the inner surface of the first liquid collecting component 11 coated with the PDMS prepolymer solution, and then placed in a drying oven and quickly dried at 80°C to form a bionic scaly microstructure, i.e., the first bionic microstructure 113, on the inner surface of the first liquid collecting component 11.

[0147] The advantages of the scaly microstructure, i.e. the first bionic microstructure 113, are: it can significantly reduce the friction resistance and turbulence during fluid flow, form smaller and more uniform droplets when the liquid is sprayed, and improve the atomization quality and heat exchange efficiency; the scaly surface is not easy to adhere to dirt and impurities, reducing the risk of nozzle clogging; at the same time, it can guide the fluid to flow more smoothly, reducing turbulence and eddies; the first bionic microstructure 113 can increase the contact area between the fluid and the inner wall of the nozzle, and improve the heat exchange efficiency; under high pressure and high speed flow conditions, it is beneficial to reduce the noise generated by the fluid flow process.

[0148] The preparation process of the inner surface of the cylindrical second liquid collecting part 21 and the cylindrical third liquid collecting part 31 is as follows:

[0149] 1) Manufacturing of the hedgehog-shaped second bionic microstructure 212: Using a femtosecond laser to perform dot matrix laser ablation according to a pre-set pattern (including but not limited to length, period, shape, dot matrix and other morphologies), the laser power is preferably set to 4W-8W, the scanning speed is 500mm / s-1000mm / s, the scanning time is 20s-25s, and the laser parameter range is adjusted according to actual specific needs, and then the laser ablated microstructure is ultrasonically cleaned with an ethanol solution for 3min-5min, and the operation is repeated 3 times, and then the treated microstructure is placed in sodium hydroxide (NaOH) and ammonium sulfate ((NH 4 ) 3 SO 4) in a mixed solution (prepared in any one ratio of 5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1 or 40:1), chemically oxidized, left to stand at room temperature for 5 to 8 minutes to form a hedgehog-like microstructure, and then washed with deionized water;

[0150] 2) Solution preparation: a certain amount of polydimethylsiloxane (PDMS) main agent and curing agent (the ratio of PDMS main agent to curing agent is 20:1, 30:1 or 40:1, whichever is selected) are prepared and mixed, and stirred at 25° C. for 25 to 35 minutes to form a PDMS prepolymer solution, and vacuumed for 30 minutes to remove bubbles, and then a certain amount of toluene (20wt%, 30wt%, 40wt%, 50wt% or 60wt% is selected) solution is added to the PDMS prepolymer solution, and stirring is continued for 15 minutes to ensure that the solution is evenly mixed to form a PDMS / toluene mixed solution;

[0151] 3) Drying treatment: The PDMS / toluene mixture was evenly spin-coated on the surface of the hedgehog-shaped microstructure at a speed of 3500 r / min for 2 min, and the film thickness was controlled to be 10 μm, and then placed in an oven at 80° C. for drying;

[0152] 4) Surface modification treatment: After drying, the microstructure is sealed in a dryer filled with a certain amount of 1H,1H,2H,2H-perfluorodeoxytriethoxysilane, the temperature is set to 85°C, and it is left to stand for 2 hours for surface modification, thereby obtaining the super-hydrophobic microstructure 213 on the inner surface of the second liquid collecting part 21 and the third liquid collecting part 31.

[0153] The present invention increases the contact area between the fluid and the surface by imitating the multi-petal structure and surface microstructure texture of the passion flower, ensures all-round coverage of the spraying process, realizes spray effects at different angles and in multiple directions, and has a wide range of applications; the surface of the internal cavity of the nozzle is provided with a scaly structure and a multi-level super-hydrophobic structure, and is provided with bionic snail shell spiral blades, which increases the uniformity and stability of liquid flow, is beneficial to the directional flow, self-cleaning and impurity filtering of the liquid, and reduces maintenance requirements; one layer of the nozzle adopts a corrosion-resistant, wear-resistant, detachable flexible hose, the length and shape of which can be adjusted according to actual needs, which increases environmental adaptability, fixed-point spraying and potential utilization, is beneficial to cleaning and maintenance, and extends the service life of the nozzle.

[0154] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A bionic multi-dimensional spray nozzle, characterized in that: It includes a first spraying mechanism, wherein the first spraying mechanism includes: A plurality of first nozzles, each of which comprises a first injection body, a spray pipe and a plurality of bionic style nozzles, the first injection body is mounted on the top of the spray pipe, the spray pipe is provided with at least one bionic arc; a plurality of bionic style nozzles are arranged on the first injection body and connected with the spray pipe, and a plurality of pores are arranged in an array on each of the bionic style nozzles; and The first liquid collecting component includes a first shell and a bionic spiral blade, wherein the bionic spiral blade is arranged in the first shell and is coaxial with the first shell; a scaly first bionic microstructure is arranged on the inner wall of the first shell; the bottom end of the spray pipe is installed on the first shell and is connected to the internal cavity flow channel of the first shell.

2. The bionic multi-dimensional spray nozzle according to claim 1, characterized in that: The helical angle of the bionic spiral blade is 15° to 45°, and the ratio of the pitch to the blade diameter of the bionic spiral blade is 1:1 to 2:

1.

3. The bionic multi-dimensional spray nozzle according to claim 1, characterized in that: Also included is a second spraying mechanism, wherein the second spraying mechanism comprises: A plurality of second nozzles, each of which comprises a second nozzle body and a guide tube, a plurality of second nozzles of different diameters are arranged on the second nozzle body, the second nozzle body is installed at the end of the guide tube, a guide hole and a guide chute are arranged in the guide tube, and the guide chute is arranged corresponding to the second nozzle; and The second liquid collecting component includes a second shell, the top end of the second shell is connected to the bottom end of the first shell, the multiple second nozzles are evenly distributed at the connection between the first shell and the second shell, and the guide holes are respectively connected to the second nozzles and the inner cavity flow channels of the first shell and the second shell, and a hedgehog-shaped second bionic microstructure is arranged on the inner wall of the second shell.

4. The bionic multi-dimensional spray nozzle according to claim 1, 2 or 3, characterized in that: Also includes a third spraying mechanism, the third spraying mechanism comprising: A plurality of third nozzles, comprising a hose housing and a flexible nozzle, wherein a distal end of the flexible nozzle is connected to the hose housing; The third liquid collecting component comprises a third shell, the top end of the third shell is connected to the bottom end of the second shell or the first shell, the hose shell is installed on the side wall of the third shell, and the flexible nozzle is connected to the inner cavity flow channel of the third shell.

5. The bionic multi-dimensional spray nozzle according to claim 4, characterized in that: The second bionic microstructure is prepared by the following method: Using a femtosecond laser to perform dot-matrix laser ablation according to the set pattern of the second bionic microstructure to form a microstructure, and adjusting the laser parameter range according to specific needs; The laser-ablated microstructure is ultrasonically cleaned using an ethanol solution; placing the treated microstructure in a mixed solution of sodium hydroxide and ammonium sulfate in a ratio of 5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1 or 40:1 for chemical oxidation, and standing at room temperature for a set time to form the hedgehog-shaped second bionic microstructure; and The prepared hedgehog-shaped second bionic microstructure is washed with deionized water.

6. The bionic multi-dimensional spray nozzle according to claim 4, characterized in that: The surface of the second bionic microstructure is also provided with a super-hydrophobic microstructure, and the surface of the third shell is also provided with the second bionic microstructure and / or the super-hydrophobic microstructure.

7. The bionic multi-dimensional spray nozzle according to claim 6, characterized in that: The super-hydrophobic microstructure is prepared by the following method: The solution preparation step comprises mixing a polydimethylsiloxane main agent and a curing agent in a ratio of 20:1, 30:1 or 40:1, and stirring at a set temperature to form a PDMS prepolymer solution; vacuuming the PDMS prepolymer solution to remove bubbles, and then adding 20wt%, 30wt%, 40wt%, 50wt% or 60wt% of a toluene solution, and continuing to stir to ensure uniform mixing, to form a PDMS / toluene mixed solution; a drying treatment step, wherein the PDMS / toluene mixed solution is evenly spin-coated on the surface of the hedgehog-shaped second bionic microstructure, and a drying treatment is performed after the film thickness is controlled; and The surface modification step is to seal the dried hedgehog-shaped second bionic microstructure in a dryer filled with a set amount of 1H,1H,2H,2H-perfluorodeoxytriethoxysilane for surface modification to obtain a super-hydrophobic microstructure on the surface of the hedgehog-shaped second bionic microstructure.

8. The bionic multi-dimensional spray nozzle according to claim 4, characterized in that: A threaded sleeve is arranged at the bottom end of the third shell, and a cross filter is arranged between the third shell and the threaded sleeve.

9. The bionic multi-dimensional spray nozzle according to claim 4, characterized in that: The first shell, the second shell and the third shell are coaxially arranged, and multiple first nozzles, second nozzles and third nozzles are radially arranged on the side walls of the first shell, the second shell and the third shell respectively, and the number of the first nozzles is greater than the number of the second nozzles and the number of the third nozzles.

10. The bionic multi-dimensional spray nozzle according to claim 1, characterized in that: The first bionic microstructure is prepared by the following method: The step of preparing a silicone scale-shaped negative template is to prepare a silicone solution by mixing a silicone base agent and a curing agent in a mass ratio of 1:1, 2:1 or 3:1; Pre-treating the surface of the squama-shaped mold; pouring the silicone solution on the surface of the squama-shaped mold, and performing silicone flexible demoulding after curing to obtain a silicone squama-shaped negative mold plate; In the mold replication step, a layer of fluorine release agent is evenly spin-coated on the surface of the silicone scale-shaped negative template and dried at room temperature; a PDMS prepolymer solution is prepared by mixing a polydimethylsiloxane main agent and a curing agent according to a set mass ratio; The PDMS prepolymer solution after air bubbles are removed is poured onto the silicone scale-shaped negative template, and then cured and demolded to obtain a bionic scale-shaped film; as well as The step of forming the first scaly bionic microstructure is to coat a layer of PDMS prepolymer solution on the inner surface of the first shell, closely adhere the bionic scaly film to the inner surface of the first shell and quickly dry it to form the first scaly bionic microstructure.

11. A method for preparing a bionic multi-dimensional spray nozzle, characterized in that: The steps include: The nozzle 3D printing step is to set the printing parameters and 3D model file and input it into the liquid metal 3D printer. The printer will stack the metal material powder layer by layer according to the path after slicing, and use high-energy laser to melt the powder to form various parts of the nozzle; The nozzle post-processing step removes the printing support structure around and inside the nozzle, and grinds and polishes the nozzle; Heat treatment of the nozzle to eliminate the internal stress generated during the printing process and improve the mechanical properties of the nozzle; The steps of preparing the internal microstructure of the nozzle further include: Preparation of the first biomimetic microstructure: The step of preparing a silicone scaly protrusion negative template comprises preparing a silicone solution by mixing a silicone main agent and a curing agent in a mass ratio of 1:1, 2:1 or 3:1; pretreating the surface of the scaly protrusion mold; pouring the silicone solution on the surface of the scaly protrusion mold, and performing flexible demoulding of the silicone after curing to obtain a silicone scaly protrusion negative template; The mold replication step comprises the following steps: evenly spin-coating a layer of fluorine release agent on the surface of the silicone scale-shaped female template and drying at room temperature; preparing a PDMS prepolymer solution by using a polydimethylsiloxane main agent and a curing agent according to a set mass ratio; pouring the PDMS prepolymer solution after removing bubbles on the silicone scale-shaped female template, and curing and demolding to obtain a bionic scale-shaped film; and The step of forming a first scaly bionic microstructure comprises coating a layer of PDMS prepolymer solution on the inner surface of the first shell, closely attaching the bionic scaly film to the inner surface of the first shell and rapidly drying the film to form the first scaly bionic microstructure; Preparation of the second bionic microstructure: Using a femtosecond laser to perform dot-matrix laser ablation according to the set pattern of the second bionic microstructure to form a microstructure, and adjusting the laser parameter range according to specific needs; The laser-ablated microstructure is ultrasonically cleaned using an ethanol solution; placing the treated microstructure in a mixed solution of sodium hydroxide and ammonium sulfate in a ratio of 5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1 or 40:1 for chemical oxidation, and standing at room temperature for a set time to form the hedgehog-shaped second bionic microstructure; and Washing the prepared hedgehog-shaped second bionic microstructure with deionized water; Preparation of superhydrophobic microstructures: The solution preparation step comprises mixing a polydimethylsiloxane main agent and a curing agent in a ratio of 20:1, 30:1 or 40:1, and stirring at a set temperature to form a PDMS prepolymer solution; vacuuming the PDMS prepolymer solution to remove bubbles, and then adding 20wt%, 30wt%, 40wt%, 50wt% or 60wt% of a toluene solution, and continuing to stir to ensure uniform mixing, to form a PDMS / toluene mixed solution; a drying treatment step, wherein the PDMS / toluene mixed solution is evenly spin-coated on the surface of the hedgehog-shaped second bionic microstructure, and a drying treatment is performed after the film thickness is controlled; and The surface modification step is to seal the dried hedgehog-shaped second bionic microstructure in a dryer filled with a set amount of 1H,1H,2H,2H-perfluorodeoxytriethoxysilane for surface modification to obtain a super-hydrophobic microstructure on the surface of the hedgehog-shaped second bionic microstructure.

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