Static mixer device for water and fertilizer integrated pipeline system

Abstract

The utility model belongs to the technical field of static mixers, and particularly relates to a static mixer device for a water and fertilizer integrated pipeline system, which comprises an irrigation pipeline and a static mixer connected with the irrigation pipeline, the static mixer comprises a shell connected with the irrigation pipeline, a flow channel is arranged in the shell, and a sinusoidal waveform guide plate is arranged in the flow channel. The sinusoidal waveform guide plate is of a spiral torsion structure, and turbulent flow teeth are arranged at wave crests and wave troughs of the sinusoidal waveform guide plate and are arranged at equal intervals in the sine curve direction of the sinusoidal waveform guide plate; according to the static mixing device, through the synergistic effect of the sinusoidal waveform flow guide plate and the turbulent flow teeth, the fluid is subjected to periodic contraction-expansion flow channel and local vortex induction, so that the mixing time is shortened, the flowing intensity and the shearing effect of the fluid are enhanced, and the mixing uniformity of two phases of water and fertilizer is realized; and the asymmetric turbulent flow teeth at the wave crests and the wave troughs can form a local shear stress gradient, so that particle aggregation and deposition are inhibited, and the volume fraction of a dead zone of a runner is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of static mixer technology, specifically relating to a static mixer device for an integrated water and fertilizer pipeline system. Background Technology

[0002] The high-input, low-efficiency agricultural production model not only causes a huge waste of water resources, but also leads to a series of environmental problems such as soil acidification and salinization, and water pollution.

[0003] With the continuous advancement of modern agricultural technology, fertigation technology has gradually gained widespread application due to its advantages in saving water and fertilizer, reducing labor input, and increasing crop yield and agricultural production efficiency. Fertilizer integration technology dissolves fertilizer in irrigation water and uses the irrigation system to evenly deliver the fertilizer solution to the crop roots, achieving simultaneous water and fertilizer supply and significantly improving water and fertilizer utilization efficiency. However, in practical applications, the degree of mixing of water and fertilizer within the pipeline directly affects the uniformity of irrigation and fertilization in the field. Uneven mixing can lead to excessively high fertilizer concentrations near the injection point, causing root burn, while areas far from the injection point may suffer from insufficient nutrients, resulting in stunted crop growth and reduced yield. Furthermore, the accumulation of unmixed fertilizer solution in localized areas can exacerbate soil salinization and further reduce water and fertilizer utilization.

[0004] In existing technologies, to solve the problem of uneven water and fertilizer mixing, optimization is mainly carried out on factors such as different pipe diameters, different main pipeline flow rates, different fertilizer injection ratios, and different temperatures. However, most of these methods focus on adjusting the fertilizer application device or external conditions, and few methods improve the structure of the irrigation pipeline system itself to improve the uniformity of water and fertilizer integration. Especially in the application scenario of high solid content fertilizer solution, the static mixers in existing technologies often have problems such as insufficient turbulence intensity and high large particle retention rate, which makes it difficult to meet the needs of modern agriculture for precision irrigation and efficient fertilization. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, this utility model provides a static mixer device for integrated water and fertilizer pipeline systems, which solves the problems of insufficient turbulence intensity and high large particle retention rate in existing static mixers.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A static mixer device for an integrated water and fertilizer pipeline system is provided, comprising an irrigation pipeline and a static mixer connected to the irrigation pipeline. The static mixer includes a shell connected to the irrigation pipeline, a flow channel is provided inside the shell, and a sinusoidal wave guide plate is provided inside the flow channel. The sinusoidal wave guide plate has a spiral torsion structure, and turbulence teeth are provided at the crests and troughs of the sinusoidal wave guide plate. The turbulence teeth are equidistantly arranged along the sinusoidal curve direction of the sinusoidal wave guide plate.

[0008] The beneficial effects of adopting the above technical solution are as follows: the irrigation pipeline, as the water and fertilizer delivery channel, provides an environment for the installation and operation of the static mixer. The connection between the irrigation pipeline and the static mixer enables efficient water and fertilizer delivery and uniform mixing, improving the uniformity and efficiency of irrigation and fertilization. The outer shell of the static mixer protects the internal components from external environmental influences while providing a stable flow channel. The sinusoidal wave guide plate inside the shell forms a continuous, gradually changing flow channel by spiraling around its central axis, efficiently cutting, splitting, rotating, and recombining the fluid flowing through the channel, achieving uniform mixing of multi-directional fluids. This significantly enhances the turbulence intensity and shearing action of the fluid, thereby improving mixing uniformity. Furthermore, the spiral twisting structure increases the residence time of the fluid in the channel, further promoting the mixing process. Simultaneously, the turbulence-inducing teeth, located at the crests and troughs of the sinusoidal wave guide plate and equidistantly arranged along the sinusoidal curve, form a shear stress gradient, effectively inhibiting particle agglomeration and deposition, reducing the risk of solid particle retention and blockage, improving the stability and reliability of the system, and promoting turbulent fluid movement, further enhancing the mixing effect.

[0009] This static mixing device, through the synergistic effect of sinusoidal wave guide plates and turbulence teeth, causes the fluid to undergo periodic contraction-expansion flow channels and local vortex induction, which enhances lateral momentum transfer, reduces mixing time, and enhances fluid flow intensity and shear effect, thereby achieving uniform mixing of water and fertilizer phases. Furthermore, the asymmetric turbulence teeth at the crests and troughs form local shear stress gradients, effectively suppressing particle agglomeration and deposition, while reducing the volume fraction of dead zones in the flow channels.

[0010] Furthermore, the spiral angle of the sinusoidal wave guide plate is 180°.

[0011] The beneficial effects of adopting the above technical solution are as follows: the sinusoidal wave guide plate forms a continuously gradually changing flow channel structure by spirally twisting 180° around the central axis, which improves the uniformity of water-fertilizer mixing. When the fluid flows through the guide plate, it undergoes periodic contraction and expansion, thereby generating strong turbulent motion, increasing the turbulence intensity, improving the momentum transfer and mass exchange efficiency inside the fluid, and enabling the water and fertilizer phases to mix more fully, thereby improving the uniformity of mixing.

[0012] Furthermore, threaded joints are provided at both ends of the outer shell, which are connected to the irrigation pipe, and the inner diameter of the irrigation pipe is the same as the diameter of the flow channel.

[0013] The beneficial effects of adopting the above technical solution are as follows: by designing threaded joints at both ends of the outer shell and ensuring that the inner diameter of the irrigation pipe is consistent with the diameter of the static mixer flow channel, a smooth transition inside the pipeline system is achieved, reducing the changes in the fluid during the flow process, avoiding eddies and turbulence caused by sudden changes in the pipe diameter, thereby maintaining stable fluid flow and ensuring the mixing effect.

[0014] Furthermore, the threaded connector is made of PP material, and a sealing gasket is provided at the connection between the threaded connector and the outer shell.

[0015] The beneficial effects of adopting the above technical solution are as follows: PP material has good chemical corrosion resistance and can resist the erosion of chemical substances such as fertilizers and pesticides in water-fertilizer mixtures, ensuring that the threaded joints are not corroded during long-term use, thereby extending their service life. The setting of the sealing gasket can effectively prevent water-fertilizer mixture from leaking at the connection, ensuring the sealing and reliability of the irrigation system.

[0016] Furthermore, the tips of the turbulence teeth are flat-headed, the tops of the turbulence teeth are provided with rounded corner planes, and the spacing between adjacent turbulence teeth is 3~5mm.

[0017] The beneficial effects of adopting the above technical solution are as follows: the tip of the turbulence tooth is designed with a flat head structure and a rounded corner plane is set at the tooth top, which can effectively reduce the resistance encountered by the fluid when flowing through the turbulence tooth, which helps to improve the overall efficiency of the irrigation system and reduce energy consumption. The spacing between adjacent turbulence teeth is set to 3~5mm, which can ensure that the fluid passes through smoothly and generate sufficient turbulence effect.

[0018] Furthermore, the wavelength of the sinusoidal wave guide plate is 1.2. D ~1.4 D The amplitude is 0.4 D ~0.6 D The thickness is 2~4mm, of which D This refers to the diameter of the irrigation pipe.

[0019] The beneficial effects of adopting the above technical solution are: the wavelength of the sinusoidal waveform guide plate is 1.2. D ~1.4 D The amplitude is 0.4 D ~0.6 D With a thickness of 2-4 mm, it can significantly improve the uniformity of water and fertilizer mixing, reduce crop growth differences caused by uneven mixing, and thus improve crop yield and quality.

[0020] Furthermore, the outer shell is made of PVC material, with an outer diameter of 75~85mm, a length of 190~210mm, and a wall thickness of 2~4mm.

[0021] The beneficial effects of adopting the above technical solution are as follows: PVC material has good corrosion resistance and can resist the erosion of chemical substances in water-fertilizer mixture, which can ensure that the static mixer is not affected by corrosion during long-term use, thereby extending the service life of the equipment.

[0022] Furthermore, the sinusoidal wave guide plate is fixed to the outer shell by hot melt welding.

[0023] In summary, the static mixer device for integrated water and fertilizer pipeline systems provided by this utility model has the following beneficial effects:

[0024] (1) The static mixer device, through the synergistic effect of the sinusoidal wave guide plate and the turbulence tooth, makes the fluid undergo periodic contraction-expansion flow channel and local vortex induction, which enhances the transverse momentum transfer and reduces the mixing time.

[0025] (2) The sinusoidal wave guide plate of the static mixer device is provided with asymmetrical turbulence teeth at the crest and trough, which can form a local shear stress gradient, suppress particle agglomeration and deposition, reduce the volume fraction of dead zone in the flow channel, and thus significantly reduce the solid particle retention rate and reduce the clogging frequency.

[0026] (3) The static mixer device relies on the fluid's own kinetic energy to achieve mixing, without the need for an external power device, thus reducing energy consumption and meeting the requirements of energy conservation and environmental protection. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Among them, 1. Irrigation pipe; 2. Static mixer; 3. Outer shell; 4. Flow channel; 5. Sine wave guide plate; 6. Turbulence tooth; 7. Threaded joint. Detailed Implementation

[0029] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0030] Example 1

[0031] like Figure 1As shown, the static mixer device for an integrated water and fertilizer pipeline system provided by this utility model includes an irrigation pipeline 1 and a static mixer 2 connected to the irrigation pipeline 1. The static mixer 2 includes a shell 3 connected to the irrigation pipeline 1. The shell 3 is made of PVC material, with an outer diameter of 75~85mm, a length of 190~210mm, and a wall thickness of 2~4mm. A flow channel 4 is provided inside the shell 3, and a sinusoidal waveform guide plate 5 is provided inside the flow channel 4. The sinusoidal waveform guide plate 5 is fixed to the shell 3 by hot-melt welding. The sinusoidal waveform guide plate 5 has a spiral twist structure with a spiral angle of 180° and a wavelength of 1.2. D ~1.4 D The amplitude is 0.4 D ~0.6 D The thickness is 2~4mm, of which D The diameter of the irrigation pipe is given, and the sinusoidal wave guide plate 5 satisfies the equation y=A*sin(ωx), where the amplitude A is 0.2~0.3 times the inner diameter of the outer shell 3, and the angular frequency ω ranges from π / (2D) to π / D. Meanwhile, turbulence teeth 6 are provided at the crests and troughs of the sinusoidal wave guide plate 5, and the turbulence teeth 6 are equidistantly arranged along the sinusoidal curve direction of the sinusoidal wave guide plate 5. The irrigation pipe 1 serves as the water and fertilizer delivery channel, providing an environment for the installation and operation of the static mixer 2. The connection between the irrigation pipe 1 and the static mixer 2 achieves efficient water and fertilizer delivery and uniform mixing, improving the uniformity and efficiency of irrigation and fertilization. The outer shell 3 in the static mixer 2 protects the internal components from external environmental influences and provides a stable flow channel 4. The sinusoidal wave guide plate 5, located inside the outer shell 3, is a sinusoidal curve that forms a continuously gradually changing flow channel 4 by spiral twisting around its central axis. This allows for efficient cutting, diversion, rotation, and... The reorganization process achieves uniform mixing of multi-directional fluids, thereby significantly enhancing the turbulence intensity and shear force of the fluids, improving mixing uniformity, and the spiral torsion structure increases the residence time of the fluid in the flow channel 4, further promoting the mixing process; at the same time, the turbulence teeth 6 are set at the crests and troughs of the sinusoidal wave guide plate 5, and are equidistantly arranged along the sinusoidal curve direction, which can form a shear stress gradient, effectively suppressing particle agglomeration and deposition, reducing the risk of solid particle retention and blockage, improving the stability and reliability of the system, and promoting the turbulent motion of the fluid, further enhancing the mixing effect.

[0032] like Figure 1As shown, threaded connectors 7 are provided at both ends of the outer shell 3. The threaded connectors 7 are made of PP material and are connected to the irrigation pipe 1. The inner diameter of the irrigation pipe 1 is the same as the diameter of the flow channel 4. A sealing gasket is provided at the connection between the threaded connector 7 and the outer shell 3. By designing the threaded connectors 7 at both ends of the outer shell 3 and ensuring that the inner diameter of the irrigation pipe 1 is the same as the diameter of the flow channel 4 of the static mixer 2, a smooth transition inside the pipeline system is achieved, reducing the changes in the fluid during the flow process and avoiding eddies and turbulence caused by sudden changes in the pipe diameter, thereby maintaining the stable flow of the fluid and ensuring the mixing effect.

[0033] like Figure 1 As shown, the tip of the turbulence tooth 6 is a flat-head structure, and the top of the tooth of the turbulence tooth 6 is provided with a rounded plane. The spacing between adjacent turbulence teeth 6 is 3~5mm. The design of the tip of the turbulence tooth 6 as a flat-head structure and the provision of a rounded plane at the top of the tooth can effectively reduce the resistance encountered by the fluid when flowing through the turbulence tooth 6, which helps to improve the overall efficiency of the irrigation system and reduce energy consumption. The spacing between adjacent turbulence teeth 6 is set at 3~5mm, which can ensure the smooth passage of the fluid and generate sufficient turbulence effect.

[0034] Example 2

[0035] Based on the static mixer device for the integrated water and fertilizer pipeline system in Example 1, the irrigation pipeline 1 in this example is a micro-sprinkler tape pipeline system.

[0036] In traditional micro-sprinkler irrigation systems, after the fertilizer solution enters the main pipe through the injection port on the pipe wall, due to the influence of fluid dynamic characteristics and density differences, a high-concentration accumulation zone easily forms in the laminar flow-dominated area, resulting in a significant difference in fertilizer solution concentration between the first and last branch pipes. To solve this problem, a static mixer device as described in Example 1 is added to the connection section between the main fertilizer injection pipe and the first branch pipe. This mixer device is securely connected to the micro-sprinkler pipe through threaded joints 7 at both ends. The outer shell 3 of the mixer device is ensured to be consistent with the inner diameter of the pipe to achieve a smooth transition. Furthermore, the sinusoidal wave guide plate 5 inside the mixer device is spirally twisted 180° around the central axis, and the flat-headed turbulence-inducing teeth 6 at its crests and troughs significantly enhance the turbulence intensity of the fluid through the periodic contraction-expansion flow channel 4 and local vortex induction.

[0037] Numerical simulation results show that after installing the mixer, the uniformity of fertilizer-liquid mass fraction distribution in the pipeline longitudinal profile improved by 63%. When the fluid passes through the mixer, the streamlines transition from laminar to turbulent flow, with a transient peak velocity of 6 m / s. The fertilizer-liquid diffusion coefficient is significantly improved. Monitoring data shows that the average relative pressure at the mixer inlet section is 9.94 kPa, while the pressure at the outlet end drops to 5.08 kPa, with an overall pressure drop of 4.86 kPa, which is within the reasonable threshold range for engineering applications. Furthermore, the average flow velocities at downstream sections of 15 cm and 20 cm are 2.58 m / s and 2.41 m / s, respectively, exhibiting a clear velocity decay characteristic. The mechanical energy conversion caused by the turbulent motion inside the mixer effectively promotes the mixing of fertilizer and water, while the pressure recovery phenomenon reduces energy loss.

[0038] In summary, the static mixer device for integrated water and fertilizer pipeline systems provided by this utility model, through the synergistic effect of the sinusoidal wave guide plate 5 and the turbulence teeth 6, causes the fluid to undergo periodic contraction-expansion flow channels 4 and local vortex induction, which enhances the transverse momentum transfer, reduces the mixing time, and enhances the flow intensity and shear effect of the fluid, thereby achieving the mixing uniformity of the water and fertilizer phases. Furthermore, the asymmetric turbulence teeth 6 at the crests and troughs form a local shear stress gradient, which effectively inhibits particle agglomeration and deposition, while reducing the dead zone volume fraction of the flow channel 4.

Claims

1. A static mixer device for an integrated water and fertilizer pipeline system, characterized in that: The device includes an irrigation pipe (1) and a static mixer (2) connected to the irrigation pipe (1). The static mixer (2) includes a housing (3) connected to the irrigation pipe (1). A flow channel (4) is provided inside the housing (3). A sinusoidal wave guide plate (5) is provided inside the flow channel (4). The sinusoidal wave guide plate (5) has a spiral twist structure. Turbulence teeth (6) are provided at the crests and troughs of the sinusoidal wave guide plate (5). The turbulence teeth (6) are equidistantly arranged along the sinusoidal curve direction of the sinusoidal wave guide plate (5).

2. The static mixer device for an integrated water and fertilizer pipeline system according to claim 1, characterized in that: The spiral angle of the sinusoidal wave guide plate (5) is 180°.

3. The static mixer device for an integrated water and fertilizer pipeline system according to claim 1, characterized in that: The outer shell (3) is provided with threaded joints (7) at both ends. The threaded joints (7) are connected to the irrigation pipe (1). The inner diameter of the irrigation pipe (1) is the same as the diameter of the flow channel (4).

4. The static mixer device for an integrated water and fertilizer pipeline system according to claim 3, characterized in that: The threaded connector (7) is made of PP material, and a sealing gasket is provided at the connection between the threaded connector (7) and the outer shell (3).

5. The static mixer device for an integrated water and fertilizer pipeline system according to claim 1, characterized in that: The tip of the turbulence tooth (6) is flat, the top of the turbulence tooth (6) is provided with a rounded plane, and the distance between adjacent turbulence teeth (6) is 3~5mm.

6. The static mixer device for an integrated water and fertilizer pipeline system according to claim 1, characterized in that: The wavelength of the sinusoidal wave guide plate (5) is 1.

2. D ~1.4 D The amplitude is 0.4 D ~0.6 D The thickness is 2~4mm, of which D This refers to the diameter of the irrigation pipe.

7. The static mixer device for an integrated water and fertilizer pipeline system according to claim 1, characterized in that: The outer shell (3) is made of PVC material, with an outer diameter of 75~85mm, a length of 190~210mm, and a wall thickness of 2~4mm.

8. The static mixer device for an integrated water and fertilizer pipeline system according to claim 1, characterized in that: The sinusoidal wave guide plate (5) is fixed to the outer shell (3) by hot melt welding.

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