Anti-backflow winding type water dropper

Abstract

The invention relates to the field of water-saving irrigation, and discloses an anti-backflow winding type water dropper which comprises a water dropper body, drip irrigation pipes are installed on the two sides of the water dropper body, an annular groove is formed in the middle of the water dropper body, an anti-blocking material layer is arranged in the annular groove of the water dropper body, and water inlets are symmetrically and evenly formed in the inner wall of the water dropper body. The water dropper comprises a water dropper body, an annular groove is formed in the water dropper body, water outlets are evenly formed in the surface of the annular groove of the water dropper body, a flow channel is formed in the water dropper body, the water outlets of the water dropper body are communicated with a water inlet of the water dropper body through the flow channel, and a turbulent flow section, an energy dissipation section and a steady flow section are arranged on the inner wall of the flow channel of the water dropper body from the water inlet to one side of the water outlet. The anti-blocking material layer is arranged in the annular groove of the water dropper body, and the turbulent flow section, the energy dissipation section and the steady flow section are arranged on the inner wall of the flow channel, so that impurities are blocked by utilizing the adsorption and filtration characteristics of the anti-blocking material layer, and impurity deposition is reduced by means of turbulent flow disturbance of the turbulent flow section.

Description

Technical Field

[0001] The invention relates to the technical field of water-saving irrigation, in particular to an anti-backflow winding dripper. Background Art

[0002] In fields such as agricultural and garden irrigation, efficient water utilization and precise irrigation are crucial. With growing awareness of water conservation and increasing demands for irrigation quality, drip irrigation technology, as an advanced water-saving irrigation method, has gained widespread adoption. Drip irrigation systems, which slowly and evenly drip water onto plant roots through drippers, effectively reduce water waste, improve irrigation efficiency, and mitigate the risks of soil compaction and pest and disease growth. This plays a crucial role in ensuring crop growth and improving both yield and quality.

[0003] In the practical application of drip irrigation technology, underground drip irrigation systems currently primarily utilize channel-type drippers. The operating principle of this type of dripper is that water flows through pre-designed channels within the dripper. Under the constraints and guidance of the channels, it slowly flows out of the outlet, irrigating the plant roots. Its structure is typically simple, generally consisting of an inlet, internal channels, and an outlet. Water enters the inlet, flows through the internal channels, and ultimately drips out of the outlet. For example, some common channel-type drippers have maze-like or spiral-shaped internal channels. These channels utilize friction and energy loss caused by water flowing through these complex channels to reduce water flow velocity and achieve uniform dripping.

[0004] However, channel-type drippers are very susceptible to clogging due to sediment, impurities, algae, and microorganisms in the water during use. Due to the complex underground environment and the high impurity content in the water, when negative pressure occurs at the outlet, these impurities tend to settle inside the channel, especially in narrow areas or bends. Gradually accumulating, they can cause blockage, affecting the normal water flow of the dripper and reducing irrigation uniformity. Summary of the Invention

[0005] In response to the deficiencies of the prior art, the present invention provides an anti-backflow winding dripper to solve the problem that traditional drippers are easily clogged by mud, impurities, algae and microorganisms in the water when negative pressure occurs at the water outlet during use.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an anti-backflow winding dripper, comprising a dripper body, drip irrigation pipes are installed on both sides of the dripper body, an annular groove is opened in the middle of the dripper body, an anti-blocking material layer is arranged in the annular groove of the dripper body, the inner wall of the dripper body is symmetrically and evenly provided with a water inlet, the surface of the annular groove of the dripper body is evenly provided with a water outlet, a flow channel is arranged inside the dripper body, the water outlet of the dripper body is connected with the water inlet of the dripper body through the flow channel, the inner wall of the flow channel of the dripper body is provided with a turbulent section, an energy dissipation section and a steady flow section from the water inlet to the water outlet, the anti-blocking material layer is used to guide the water flow at the water outlet to drip, and filter the adsorbed impurities when negative pressure appears at the water outlet, the outer wall of the dripper body, the outer wall of the drip irrigation pipe and the outer wall of the anti-blocking material layer are all provided with a PE film, and a through hole is evenly opened on one side of the PE film, and the through hole is located in the middle of the anti-blocking material layer.

[0007] By adopting the above technical solution, after the water enters the dripper, it first passes through the turbulent flow section to disrupt the water flow, initially consuming energy and using turbulent disturbances to reduce impurity deposition. Then, in the energy dissipation section, a special structure further consumes the remaining energy of the water flow. Finally, the water flows out smoothly through the steady flow section to ensure water outlet uniformity. At the same time, the anti-blocking material layer can guide the water to drip smoothly. When negative pressure occurs at the outlet, it uses its own adsorption and filtration properties to effectively block mud, impurities, algae, and microorganisms, preventing them from entering the dripper and entering the steady flow channel to clog the entire flow stabilizer and emitter. This achieves the goal of improving the anti-clogging ability of the dripper and ensuring the stable operation of the drip irrigation system. It solves the problem that traditional drippers are easily clogged by mud, impurities, algae, and microorganisms in the water when negative pressure occurs at the outlet during use.

[0008] Preferably, the turbulent section includes spiral protrusions, irregular tooth structures, and several winding bends arranged on the inner wall of the flow channel, which are used to make the water flow produce a turbulent and irregular flow state after the water flows into the flow channel from the water inlet, allowing the fluid particles to mix and collide with each other, forming turbulence, performing preliminary energy dissipation, and utilizing the disturbance of turbulence to reduce the deposition of impurities in the flow channel.

[0009] Preferably, the energy dissipation section includes an S-shaped channel, a zigzag channel, and a variable-diameter channel, which are used to cause the water flow to collide, rub, diffuse, and shrink continuously after initial energy dissipation in the turbulent section, thereby consuming the remaining energy of the water flow.

[0010] Preferably, the flow stabilization section includes a smooth, regular straight channel or a flow channel with a gradually changing cross-sectional shape, which is used to reduce the disturbance of the water flow after the residual energy of the water flow is consumed in the energy dissipation section, so that the water flows out smoothly from the outlet.

[0011] Preferably, the anti-blocking material layer comprises the following raw materials in mass percentage: quartz sand 40%-50%, activated carbon 15%-20%, anatase nano-TiO2 8%-12%, nano-silver loaded zeolite 5%-8%, paraffin 15%-20%, sodium feldspar 3%-5%, and oleic acid 0.5%-1.5%.

[0012] Preferably, the particle size of the quartz sand is 5-10 μm, and the specific surface area of the activated carbon is not less than 1500 m 2 / g, porosity is 80%-90%, the particle size of the anatase nano-TiO2 is 20-50nm, the purity is not less than 99%, the nano-silver loaded zeolite is Ag-ZSM-5 zeolite, the silver ion loading accounts for 3%-5% of the weight of the zeolite, the melting point of the paraffin is 50-60°C, the chemical composition of the albite is NaAlSi3O8, the purity is not less than 95%, and the purity of the oleic acid is not less than 98%.

[0013] Preferably, the method for preparing the anti-blocking material layer comprises the following steps:

[0014] S1. Prepare raw materials: weigh quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, paraffin, albite, and oleic acid according to percentage, and dry the quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, and albite to remove moisture;

[0015] S2. Mixing raw materials: adding dried quartz sand, activated carbon, anatase nano-TiO2, nano-silver loaded zeolite, albite and oleic acid into a ball mill, adding ethanol as a dispersion medium, grinding to uniformly mix the raw materials to form a mixed slurry, then heating paraffin wax to completely melt it, adding it to the mixed slurry, stirring to uniformly mix the paraffin wax and the mixed slurry to form a mixed material;

[0016] S3. Molding and sintering: The mixed material is transferred to a mold and pressed to obtain a green body. The green body is placed in a high-temperature sintering furnace. The temperature is increased and kept sintered under a nitrogen protective atmosphere. After sintering, the green body is cooled to room temperature with the furnace to complete the preparation.

[0017] Preferably, the drying treatment in S1 includes drying at a temperature of 105-110°C for 2-3 hours, and the moisture contents of the quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, and albite are not greater than 0.5%, 0.3%, 0.2%, 0.2%, and 0.5%, respectively.

[0018] Preferably, the grinding speed in S2 is 200-300 rpm, the grinding time is 2-3 hours, the heating temperature is not lower than 70° C., and the stirring time is 30-40 minutes.

[0019] Preferably, the pressure of the pressing in S3 is 4-6 MPa, the heating is carried out to 1100-1200° C. at a heating rate of 5-8° C. / min, and the time of the heat preservation sintering is 2-4 hours.

[0020] Working Principle: During operation, water flows from the dripper's inlet into the internal flow channel. The turbulent flow section alters the water's original direction and velocity, creating a chaotic and irregular flow pattern. Fluid particles mix and collide, creating turbulence. This process initially dissipates the water's energy, and the resulting disturbances prevent impurities from settling on the channel walls, reducing the risk of clogging. The water then enters the energy dissipation section, where continuous collisions, friction, diffusion, and contraction further dissipate any remaining energy, creating conditions for subsequent smooth water discharge. After passing through the energy dissipation section, the water enters the steady flow section, allowing it to flow smoothly out of the outlet. The anti-clogging material layer guides the water out of the outlet smoothly. When negative pressure develops at the outlet, the anti-clogging material layer, through its adsorption and filtration capabilities, traps any trapped sediment, impurities, algae, and microorganisms, preventing them from entering the dripper's internal flow channel and preventing clogging.

[0021] The present invention provides an anti-backflow winding dripper. It has the following beneficial effects:

[0022] 1. The present invention arranges an anti-blocking material layer in the annular groove of the dripper body, and arranges a turbulent flow section, an energy dissipation section, and a steady flow section on the inner wall of the flow channel, thereby utilizing the adsorption and filtration characteristics of the anti-blocking material layer to block impurities, relying on the turbulent flow disturbance of the turbulent flow section to reduce impurity deposition, and using the energy dissipation section to further consume water flow energy to reduce the possibility of impurity adhesion. The steady flow section ensures that the water flow smoothly flushes away some impurities, preventing the dripper from being blocked by mud, impurities, algae, microorganisms, etc., solving the problem that traditional drippers are easily blocked by mud, impurities, algae, microorganisms, etc. in the water when negative pressure occurs at the water outlet during use.

[0023] 2. The present invention uses quartz sand to provide a skeleton, activated carbon to adsorb impurities, anatase nano-TiO2 to achieve self-cleaning, nano-silver-loaded zeolite to resist bacteria and adsorb, paraffin to create pores, sodium feldspar to enhance mechanical strength, and oleic acid to improve the mixing effect, thereby forming an anti-blocking material layer that effectively filters mud, impurities, algae and microorganisms, greatly reducing the risk of dripper clogging and ensuring the long-term stable operation of the drip irrigation system.

[0024] 3. The present invention reduces the use of additional filtering components and reduces the cost of raw materials through the design of built-in anti-blocking material layer. At the same time, the structural design of the dripper body facilitates the use of automated production processes such as injection molding, which can achieve high-speed production, improve production efficiency, reduce labor costs and time costs in the production process, and make the product more competitive in the market.

[0025] 4. The overall structure of the present invention is compact and small. It can be flexibly installed and used regardless of whether it is above-ground irrigation or underground irrigation. The anti-blocking and steady-flow design enables it to adapt to water sources of different water qualities and can work normally in water environments containing more impurities, thereby expanding the application range of the drip irrigation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the partial structure of the dripper body of the anti-backflow wrap-around dripper proposed in the present invention;

[0027] Figure 2 This is a schematic diagram of the partial structure of the annular groove of the anti-backflow winding dripper proposed in the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the dripper body of the anti-backflow winding dripper proposed in the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the PE film of the anti-backflow wrap-around dripper proposed in the present invention;

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure of the anti-backflow winding dripper proposed in the present invention;

[0031] Figure 6 This is a flow chart of the method for preparing the anti-blocking material layer of the anti-backflow winding dripper proposed in the present invention.

[0032] Among them, 1. dripper body; 2. drip irrigation pipe; 3. anti-blocking material layer; 4. water outlet; 5. annular groove; 6. water inlet; 7. turbulent flow section; 8. energy dissipation section; 9. steady flow section; 10. PE film; 11. through hole. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Please see the attached Figure 1 -Attached Figure 4The embodiment of the present invention provides an anti-backflow winding dripper, which includes a dripper body 1, drip irrigation pipes 2 are installed on both sides of the dripper body 1, an annular groove 5 is opened in the middle of the dripper body 1, an anti-blocking material layer 3 is arranged in the annular groove 5 of the dripper body 1, the inner wall of the dripper body 1 is symmetrically and evenly opened with water inlets 6, the surface of the annular groove 5 of the dripper body 1 is evenly opened with water outlets 4, the interior of the dripper body 1 is provided with a flow channel, the water outlet 4 of the dripper body 1 is connected to the water inlet 6 of the dripper body 1 The flow channels are interconnected, and the inner wall of the flow channel of the dripper body 1 is provided with a turbulent flow section 7, an energy dissipation section 8, and a steady flow section 9 from the water inlet 6 to the water outlet 4. The anti-blocking material layer 3 is used to guide the water flow at the water outlet 4 to drip, and to filter the adsorbed impurities when negative pressure appears at the water outlet 4. The outer wall of the dripper body 1, the outer wall of the drip irrigation pipe 2, and the outer wall of the anti-blocking material layer 3 are all provided with a PE film 10. Through holes 11 are evenly opened on one side of the PE film 10, and the through hole 11 is located in the middle of the anti-blocking material layer 3.

[0035] Specifically, the dripper body 1 is manufactured using an injection molding process, and high-strength, aging-resistant plastic materials such as polyvinyl chloride (PVC) or high-density polyethylene (HDPE) are selected. According to design requirements, precision molds are used for injection molding to ensure the dimensional accuracy and shape accuracy of the annular groove 5, the water inlet 6, and the water outlet 4. The depth and width of the annular groove 5 are precisely designed according to the size of the anti-blocking material layer 3 to ensure that the anti-blocking material layer 3 can be tightly embedded without affecting the structural strength of the dripper body 1. Water is introduced into the dripper body 1 through the drip irrigation pipe 2, and enters the turbulent flow section 7, the energy dissipation section 8, and the steady flow section 9 in sequence through the water inlet 6, and then discharged through the water outlet 4. The water flow at the water outlet 4 is guided to drip through the anti-blocking material layer 3, and the adsorbed impurities are filtered when negative pressure appears at the water outlet 4. The dripper is installed on the pipe of the drip irrigation system to ensure that the water inlet 6 is tightly connected to the pipe and there is no water leakage. During the operation of the drip irrigation system, water flows from the pipe into the water inlet 6 of the dripper body 1, passes through the turbulent flow section 7, the energy dissipation section 8, and the steady flow section 9 in sequence, and finally flows out of the water outlet 4. When negative pressure occurs at the water outlet 4, the anti-blocking material layer 3 can quickly absorb surrounding impurities, preventing them from entering the flow channel inside the dripper. When water is flowing normally, the flushing effect of the water flow will remove some of the impurities adsorbed by the anti-blocking material layer 3, maintaining the filtration performance of the anti-blocking material layer 3. During use, regularly check the working status of the dripper and observe the water output from the water outlet 4. If blockage or uneven water output is found, clean or replace the dripper in a timely manner to ensure the normal operation of the drip irrigation system. The PE film 10 is arranged on the outer wall of the dripper body 1, the outer wall of the drip irrigation pipe 2, and the outer wall of the anti-blocking material layer 3 by winding, laminating, etc., thereby protecting them. Through the uniform opening of the through-holes 11, water flows through the anti-blocking material layer 3 and out of the dripper for drip irrigation.

[0036] The turbulent section 7 includes spiral protrusions, irregular tooth structures, and several winding bends arranged on the inner wall of the flow channel. It is used to make the water flow turbulent and irregular after entering the flow channel from the water inlet 6, so that the fluid particles mix and collide with each other to form turbulence, perform preliminary energy dissipation, and use the disturbance of turbulence to reduce the deposition of impurities in the flow channel.

[0037] Specifically, after the water flows into the flow channel from the water inlet 6, the turbulent section 7 causes the water flow to produce a turbulent and irregular flow state, causing the fluid particles to mix and collide with each other, forming turbulence, and performing initial energy dissipation. The disturbance of the turbulent flow is used to reduce the deposition of impurities in the flow channel, thereby reducing the initial energy of the water flow and avoiding the impact of excessive water flow energy on subsequent structures. At the same time, the characteristics of turbulence are used to reduce the adhesion and accumulation of impurities in the flow channel, reduce the risk of emitter blockage, ensure that the emitter can work continuously and stably, and improve the reliability and service life of the drip irrigation system.

[0038] The energy dissipation section 8 includes an S-shaped channel, a zigzag channel, and a variable-diameter channel, which is used to cause the water flow to continuously collide, rub, diffuse, and shrink after the initial energy dissipation in the turbulent section 7, thereby consuming the remaining energy of the water flow.

[0039] Specifically, after the initial energy dissipation in the turbulent section 7 through the energy dissipation section 8, the water flow is further caused to collide, rub, diffuse, and shrink continuously, consuming the remaining energy of the water flow, thereby fully reducing the energy of the water flow and making the water flow in a relatively low energy state before reaching the outlet, avoiding the water flow from flowing out too fast or with too much pressure, ensuring that the irrigation water can drip into the soil evenly and slowly, improving the uniformity and accuracy of irrigation, and better meeting the water absorption needs of crop growth.

[0040] The flow stabilization section 9 includes a smooth, regular straight channel or a flow channel with a gradually changing cross-sectional shape, which is used to reduce the disturbance of the water flow after the energy dissipation section 8 consumes the remaining energy of the water flow, so that the water flows out smoothly from the water outlet 4.

[0041] Specifically, after the energy dissipation section 8 consumes the remaining energy of the water flow, the flow stabilization section 9 reduces water disturbances, allowing the water to flow smoothly from the water outlet 4. This ensures the stability and uniformity of the water output from the dripper, avoiding the occurrence of fluctuating or intermittent water flow. Stable water output helps improve irrigation effectiveness, allowing crop roots to absorb water evenly, promoting crop growth and development, while also preventing damage to soil structure caused by unstable water flow.

[0042] The anti-blocking material layer 3 comprises the following raw materials by mass percentage: quartz sand 40%-50%, activated carbon 15%-20%, anatase nano-TiO2 8%-12%, nano-silver loaded zeolite 5%-8%, paraffin wax 15%-20%, albite 3%-5%, and oleic acid 0.5%-1.5%. The particle size of the quartz sand is 5-10 μm, and the specific surface area of the activated carbon is not less than 1500 m 2 / g, porosity is 80%-90%, the particle size of anatase nano-TiO2 is 20-50nm, the purity is not less than 99%, the nano-silver loaded zeolite is Ag-ZSM-5 zeolite, the silver ion loading accounts for 3%-5% of the weight of the zeolite, the melting point of paraffin is 50-60℃, the chemical composition of albite is NaAlSi3O8, the purity is not less than 95%, and the purity of oleic acid is not less than 98%.

[0043] Specifically, quartz sand, the primary skeleton material, has a particle size of 5-10 μm. This provides a rigid foundation for the anti-clogging layer, providing stable support for the entire layer and preventing it from deforming during use, ensuring the anti-clogging function remains stable. Furthermore, the gaps between the quartz sand particles contribute to the initial filtration of the water flow.

[0044] Activated carbon has a specific surface area of not less than 1500m 2 / g, with a porosity of 80%-90%. Once added, its developed pore structure and large specific surface area allow for physical adsorption of impurities, organic matter, and microorganisms in the water. This effectively intercepts all types of impurities, significantly improving the filtration accuracy of the anti-clogging material layer and reducing the possibility of impurities entering the dripper and causing clogging.

[0045] Anatase nano-TiO2 has a particle size of 20-50nm and a purity of no less than 99%. Once added, it generates a photocatalytic reaction under light, generating highly oxidizing hydroxyl radicals. These decompose organic pollutants adsorbed on the surface of the anti-blocking material layer, such as organic matter secreted by algae and sticky substances produced by microorganisms. This acts as a self-cleaning agent, further preventing blockages and maintaining the long-term effectiveness of the anti-blocking material layer.

[0046] The nanosilver-loaded zeolite is Ag-ZSM-5, with a silver ion loading of 3%-5% by weight. The addition of silver ions inhibits the growth of microorganisms in the water by utilizing their antibacterial properties. Zeolite also possesses a certain adsorption capacity, absorbing heavy metal ions and some organic matter in the water. This synergistic combination of antibacterial and adsorption prevents clogging caused by microbial growth, extending the life of the anti-clogging material layer.

[0047] The melting point of paraffin wax is 50-60°C. After addition, the wax is heated, melted, and then cooled to form a specific pore structure within the anti-blocking material layer. This controls the material's porosity and pore size, ensuring the anti-blocking material layer has excellent water permeability while effectively blocking impurities, ensuring smooth water flow while also acting as a filter.

[0048] Sodium feldspar is composed of NaAlSi3O8, with a purity of no less than 95%. Its addition during high-temperature sintering reduces the sintering temperature, promotes fusion between the raw materials, and increases the density of the material. This enhances the mechanical strength of the anti-blocking material layer, making it less susceptible to breakage and pulverization during long-term use, thus ensuring the stability of the anti-blocking function.

[0049] Oleic acid, with a purity of no less than 98%, reduces surface tension between raw material particles during mixing, improving the dispersibility and wettability of each raw material. This allows the various raw materials to be mixed more evenly, ensuring consistent performance across the anti-blocking material layer and avoiding localized performance variations caused by uneven raw material mixing.

[0050] Through the collaborative efforts of various raw materials, quartz sand provides a framework, activated carbon absorbs impurities, anatase nano-TiO2 provides self-cleaning properties, nano-silver-loaded zeolite provides antibacterial and adsorbent properties, paraffin wax creates pores, albite enhances mechanical strength, and oleic acid improves mixing. This results in a uniformly mixed, anti-clogging material layer that boasts high strength, high adsorption, self-cleaning properties, antibacterial properties, a well-defined pore structure, and a uniformly mixed structure. This effectively addresses the problem of traditional drippers being easily clogged by sediment, impurities, algae, and microorganisms, ensuring long-term, stable operation of the drip irrigation system and improving irrigation efficiency and quality.

[0051] The method for preparing the anti-blocking material layer 3 comprises the following steps:

[0052] S1. Prepare raw materials: weigh quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, paraffin, sodium feldspar, and oleic acid according to percentage, and dry the quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, and sodium feldspar to remove moisture; the drying process in S1 includes drying at a temperature of 105-110° C. for 2-3 hours, and the moisture contents of the quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, and sodium feldspar are no more than 0.5%, 0.3%, 0.2%, 0.2%, and 0.5%, respectively.

[0053] Specifically, use a high-precision electronic scale to accurately weigh each raw material according to the percentage. Place quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, and sodium feldspar in a drying oven, set the temperature to 105-110°C, and dry for 2-3 hours. During the drying process, use a moisture meter to regularly test to ensure that the moisture content of quartz sand is no more than 0.5%, activated carbon is no more than 0.3%, anatase nano-TiO2 is no more than 0.2%, nano-silver-loaded zeolite is no more than 0.2%, and sodium feldspar is no more than 0.5%.

[0054] S2, mixed raw materials: dried quartz sand, activated carbon, anatase nano-TiO2, nano-silver loaded zeolite, sodium feldspar and oleic acid are added to a ball mill, and ethanol is added as a dispersion medium, and ground to uniformly mix the raw materials to form a mixed slurry, and then paraffin is heated to completely melt it, added to the mixed slurry, and stirred to uniformly mix the paraffin and the mixed slurry to form a mixed material; the grinding speed in S2 is 200-300 rpm, the time is 2-3 hours, the heating temperature is not lower than 70°C, and the stirring time is 30-40 minutes.

[0055] Specifically, dried quartz sand, activated carbon, anatase nano-TiO2, nano-silver loaded zeolite, sodium feldspar and oleic acid are added to the ball mill in sequence, and an appropriate amount of ethanol is poured in as a dispersion medium. Start the ball mill, set the speed to 200-300rpm, and grind for 2-3 hours. During the grinding process, the grinding balls in the ball mill continuously collide and rub the raw material particles, causing them to gradually refine and evenly mix to form a fine mixed slurry. Subsequently, paraffin is placed in a heating container, and the heating temperature is not lower than 70°C until the paraffin is completely melted. Slowly pour the molten paraffin into the mixed slurry, turn on the stirring device, and stir at an appropriate stirring speed for 30-40 minutes to fully mix the paraffin and the mixed slurry to obtain a uniform mixture.

[0056] S3, Molding and Sintering: The mixed material is transferred to a mold and pressed to form a green body. The green body is placed in a high-temperature sintering furnace and heated and sintered under a nitrogen atmosphere. After sintering, the green body is cooled to room temperature in the furnace to complete the preparation. The pressing pressure in S3 is 4-6 MPa, and the temperature is increased to 1100-1200°C at a heating rate of 5-8°C / min. The sintering time is 2-4 hours.

[0057] Specifically, the mixture is carefully transferred to a pre-designed mold. The shape and size of the mold are customized according to the installation requirements of the anti-blocking material layer in the dripper. The mold containing the mixture is placed in a press and a pressure of 4-6MPa is applied for compression molding, so that the mixture is initially formed into a green body with a certain shape and strength in the mold. The green body is taken out of the mold and placed in a high-temperature sintering furnace. Nitrogen is introduced into the sintering furnace to create a nitrogen protective atmosphere to prevent the green body from being oxidized at high temperatures. The sintering furnace temperature is heated to 1100-1200℃ at a heating rate of 5-8℃ / min, and sintered at this temperature for 2-4 hours. After sintering is completed, turn off the power of the sintering furnace and let the green body cool naturally to room temperature with the furnace. At this time, the preparation of the anti-blocking material layer is completed.

[0058] Install the prepared anti-blocking material layer into the annular groove 5 of the dripper body 1. During installation, an appropriate adhesive or inlay method can be used to ensure that the anti-blocking material layer is tightly combined with the dripper body, and the water outlet accurately corresponds to the water outlet of the dripper body. Install the dripper with the anti-blocking material layer installed into the drip irrigation system and connect the water pipe. During the operation of the drip irrigation system, water flows into the dripper body from the water inlet, passes through the turbulent flow section, energy dissipation section, and steady flow section in sequence, and finally flows out through the water outlet. When negative pressure appears at the water outlet, the anti-blocking material layer, with its special composition and structure, effectively absorbs and filters mud, impurities, algae and microorganisms in the water, preventing them from entering the interior of the dripper. When water is flowing normally, the flushing effect of the water flow can carry away some impurities adsorbed on the surface of the anti-blocking material layer, maintain the filtering performance of the anti-blocking material layer, and ensure the normal operation of the dripper and the stable operation of the drip irrigation system.

[0059] The following is further introduced in conjunction with specific embodiments:

[0060] Example 1:

[0061] An anti-backflow winding dripper includes a dripper body 1, an annular groove 5 is provided in the middle of the dripper body 1, an anti-blocking material layer 3 is provided in the annular groove 5 of the dripper body 1, and a water inlet 6 is symmetrically and evenly provided on the inner wall of the dripper body 1. A water outlet 4 is evenly provided on the surface of the annular groove 5 of the dripper body 1. A flow channel is provided inside the dripper body 1, and the water outlet 4 of the dripper body 1 is connected with the water inlet 6 of the dripper body 1 through the flow channel. A turbulent section 7, an energy dissipation section 8, and a steady flow section 9 are provided on the inner wall of the flow channel of the dripper body 1 from the water inlet 6 to the water outlet 4. The anti-blocking material layer 3 is used to guide the water flow at the water outlet 4 to drip, and to filter the adsorbed impurities when negative pressure appears at the water outlet 4.

[0062] The turbulent section 7 includes spiral protrusions, irregular tooth structures, and several winding bends arranged on the inner wall of the flow channel. It is used to make the water flow turbulent and irregular after entering the flow channel from the water inlet 6, so that the fluid particles mix and collide with each other to form turbulence, perform preliminary energy dissipation, and use the disturbance of turbulence to reduce the deposition of impurities in the flow channel.

[0063] The energy dissipation section 8 includes an S-shaped channel, a zigzag channel, and a variable-diameter channel, which is used to cause the water flow to continuously collide, rub, diffuse, and shrink after the initial energy dissipation in the turbulent section 7, thereby consuming the remaining energy of the water flow.

[0064] The flow stabilization section 9 includes a smooth, regular straight channel or a flow channel with a gradually changing cross-sectional shape, which is used to reduce the disturbance of the water flow after the energy dissipation section 8 consumes the remaining energy of the water flow, so that the water flows out smoothly from the water outlet 4.

[0065] The anti-blocking material layer 3 includes the following raw materials in percentage by mass: 50% quartz sand, 20% activated carbon, 12% anatase nano-TiO2, 8% nano-silver loaded zeolite, 20% paraffin, 5% albite, and 1.5% oleic acid.

[0066] The particle size of quartz sand is 6μm, and the specific surface area of activated carbon is not less than 1500m 2 / g, porosity is 85%, the particle size of anatase nano-TiO2 is 35nm, the purity is not less than 99%, the nano-silver loaded zeolite is Ag-ZSM-5 zeolite, the silver ion loading accounts for 4% of the weight of the zeolite, the melting point of paraffin is 55°C, the chemical composition of albite is NaAlSi3O8, the purity is not less than 95%, and the purity of oleic acid is not less than 98%.

[0067] The method for preparing the anti-blocking material layer 3 comprises the following steps:

[0068] S1. Prepare raw materials: weigh quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, paraffin, albite, and oleic acid according to percentage, and dry the quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, and albite to remove moisture;

[0069] S2. Mixing raw materials: adding dried quartz sand, activated carbon, anatase nano-TiO2, nano-silver loaded zeolite, albite and oleic acid into a ball mill, adding ethanol as a dispersion medium, grinding to uniformly mix the raw materials to form a mixed slurry, then heating paraffin wax to completely melt it, adding it to the mixed slurry, stirring to uniformly mix the paraffin wax and the mixed slurry to form a mixed material;

[0070] S3. Molding and sintering: The mixed material is transferred to a mold and pressed to obtain a green body. The green body is placed in a high-temperature sintering furnace. The temperature is increased and kept sintered under a nitrogen protective atmosphere. After sintering, the green body is cooled to room temperature with the furnace to complete the preparation.

[0071] The drying treatment in S1 includes drying at a temperature of 100° C. for 2.5 hours, and the moisture contents of quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, and albite are not greater than 0.5%, 0.3%, 0.2%, 0.2%, and 0.5%, respectively.

[0072] The grinding speed in S2 is 250 rpm, the grinding time is 2.5 hours, the heating temperature is not lower than 70° C., and the stirring time is 35 minutes.

[0073] The pressing pressure in S3 is 5 MPa, the temperature is raised to 1150° C. at a heating rate of 6° C. / min, and the sintering time is 3 hours.

[0074] Example 2:

[0075] This embodiment differs from the above-mentioned embodiment 1 in that:

[0076] The anti-blocking material layer 3 includes the following raw materials in percentage by mass: quartz sand 40%, activated carbon 15%, anatase nano-TiO2 8%, nano-silver loaded zeolite 5%, paraffin 15%, albite 3%, and oleic acid 0.5%.

[0077] Example 3:

[0078] This embodiment differs from the above-mentioned embodiment 1 in that:

[0079] The anti-blocking material layer 3 includes the following raw materials in percentage by mass: quartz sand 45%, activated carbon 17.5%, anatase nano-TiO2 10%, nano-silver loaded zeolite 6.5%, paraffin 17.5%, albite 4%, and oleic acid 1%.

[0080] Table 1:

[0081] contrast Example 1 Example 2 Example 3 Standard value Filtration accuracy (μm) 1 2 1.5 5 Adsorption capacity (mg / g) 40 30 35 10 Microbial inhibition rate (%) 99 95 97 70 Decomposition rate of organic pollutants (%) 70 60 65 none

[0082] The above table compares traditional anti-blocking materials. Table 1 shows that different contents of quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, paraffin, sodium feldspar, and oleic acid can affect the filtration accuracy, adsorption capacity, microbial inhibition rate, and organic pollutant decomposition rate of the anti-blocking material, thereby regulating the anti-blocking performance, meeting diverse usage needs, reducing the risk of blockage, ensuring stable operation of the dripper, reducing maintenance costs, and allowing the anti-blocking material to maintain good performance under different water quality, light, and microbial content conditions, thereby expanding the application scope of technologies such as drip irrigation.

[0083] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An anti-backflow winding dripper, comprising a dripper body (1), characterized in that: Drip irrigation pipes (2) are installed on both sides of the dripper body (1); an annular groove (5) is provided in the middle of the dripper body (1); an anti-blocking material layer (3) is provided in the annular groove (5) of the dripper body (1); water inlets (6) are symmetrically and evenly provided on the inner wall of the dripper body (1); water outlets (4) are evenly provided on the surface of the annular groove (5) of the dripper body (1); a flow channel is provided inside the dripper body (1); the water outlet (4) of the dripper body (1) is connected to the water inlet (6) of the dripper body (1) through the flow channel; the dripper The inner wall of the flow channel of the main body (1) is provided with a turbulent flow section (7), an energy dissipation section (8), and a steady flow section (9) on one side from the water inlet (6) to the water outlet (4); the anti-blocking material layer (3) is used to guide the water flow at the water outlet (4) to drip down, and to filter the adsorbed impurities when negative pressure occurs at the water outlet (4); the outer wall of the dripper body (1), the outer wall of the drip irrigation pipe (2), and the outer wall of the anti-blocking material layer (3) are all provided with a PE film (10); through holes (11) are evenly opened on one side of the PE film (10); and the through holes (11) are located in the middle of the anti-blocking material layer (3).

2. The anti-backflow wrap-around dripper according to claim 1, characterized in that: The turbulent flow section (7) comprises spiral protrusions, irregular tooth structures and a plurality of zigzag bends arranged on the inner wall of the flow channel, and is used to cause the water flow to produce a turbulent and irregular flow state after entering the flow channel from the water inlet (6), so that the fluid particles mix and collide with each other, forming turbulence, performing preliminary energy dissipation, and utilizing the disturbance of the turbulent flow to reduce the deposition of impurities in the flow channel.

3. The anti-backflow wrap-around dripper according to claim 1, characterized in that: The energy dissipation section (8) comprises an S-shaped channel, a zigzag channel and a variable diameter channel, and is used to cause the water flow to continuously collide, rub, diffuse and contract after the initial energy dissipation in the turbulent section (7), thereby consuming the remaining energy of the water flow.

4. The anti-backflow wrap-around dripper according to claim 1, characterized in that: The flow stabilization section (9) comprises a smooth, regular straight channel or a flow channel with a gradually changing cross-sectional shape, and is used to reduce the disturbance of the water flow after the energy dissipation section (8) consumes the remaining energy of the water flow, so that the water flow flows out smoothly from the water outlet (4).

5. The anti-backflow wrap-around dripper according to claim 1, characterized in that: The anti-blocking material layer (3) comprises the following raw materials in percentage by mass: quartz sand 40%-50%, activated carbon 15%-20%, anatase nano-TiO2 8%-12%, nano-silver loaded zeolite 5%-8%, paraffin 15%-20%, albite 3%-5%, and oleic acid 0.5%-1.5%.

6. The anti-backflow wrap-around dripper according to claim 5, characterized in that: The particle size of the quartz sand is 5-10 μm, and the specific surface area of the activated carbon is not less than 1500 m 2 / g, porosity is 80%-90%, the particle size of the anatase nano-TiO2 is 20-50nm, the purity is not less than 99%, the nano-silver loaded zeolite is Ag-ZSM-5 zeolite, the silver ion loading accounts for 3%-5% of the weight of the zeolite, the melting point of the paraffin is 50-60°C, the chemical composition of the albite is NaAlSi3O8, the purity is not less than 95%, and the purity of the oleic acid is not less than 98%.

7. The anti-backflow wrap-around dripper according to claim 5, characterized in that: The method for preparing the anti-blocking material layer (3) comprises the following steps: S1. Prepare raw materials: weigh quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, paraffin, albite, and oleic acid according to percentage, and dry the quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, and albite to remove moisture; S2. Mixing raw materials: adding dried quartz sand, activated carbon, anatase nano-TiO2, nano-silver loaded zeolite, albite and oleic acid into a ball mill, adding ethanol as a dispersion medium, grinding to uniformly mix the raw materials to form a mixed slurry, then heating paraffin wax to completely melt it, adding it to the mixed slurry, stirring to uniformly mix the paraffin wax and the mixed slurry to form a mixed material; S3. Molding and sintering: The mixed material is transferred to a mold and pressed to obtain a green body. The green body is placed in a high-temperature sintering furnace. The temperature is increased and kept sintered under a nitrogen protective atmosphere. After sintering, the green body is cooled to room temperature with the furnace to complete the preparation.

8. The anti-backflow wrap-around dripper according to claim 7, characterized in that: The drying treatment in S1 includes drying at a temperature of 105-110° C. for 2-3 hours, and the moisture contents of the quartz sand, activated carbon, anatase nano-TiO2, nano-silver-loaded zeolite, and albite are not greater than 0.5%, 0.3%, 0.2%, 0.2%, and 0.5%, respectively.

9. The anti-backflow wrap-around dripper according to claim 7, characterized in that: The grinding speed in S2 is 200-300 rpm, the time is 2-3 hours, the heating temperature is not lower than 70° C., and the stirring time is 30-40 minutes.

10. The anti-backflow wrap-around dripper according to claim 7, characterized in that: The pressure of the pressing in S3 is 4-6 MPa, the heating is carried out to 1100-1200° C. at a heating rate of 5-8° C. / min, and the sintering time is 2-4 hours.

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