A morning glory-like flow channel emitter with adjustable hydraulic parameters and its use method

Abstract

The present invention discloses a morning glory-like flow channel emitter with adjustable hydraulic parameters and a method for using the same. The emitter comprises a plurality of emitter units that can be spliced ​​together, wherein a bionic energy dissipation flow channel is provided in the emitter unit, wherein both ends of the bionic energy dissipation flow channel are respectively provided with a water inlet and a water outlet, wherein a central region of the bionic energy dissipation flow channel is provided with one or more bionic emitter flow channel units, wherein the bionic emitter flow channel unit comprises a central water-passing main channel, wherein the side of the central water-passing main channel is provided with a plurality of morning glory-like structured tributary channels connected thereto. The present invention can slow down the water flow in the drip irrigation emitter while being able to select the number of emitters according to actual conditions, thereby quickly and freely controlling the size of the irrigation water flow, and is also convenient for disassembly and cleaning.

Description

Technical Field

[0001] The invention relates to the technical field of emitter manufacturing and design, in particular to an emitter with adjustable hydraulic parameters imitating a morning glory flow channel and a use method thereof. Background Art

[0002] Drip irrigation is widely used in arid and water-scarce regions due to its efficient water-saving capabilities. It uses plastic pipes to deliver water to crop roots through orifices or emitters on capillary tubes for localized irrigation. The emitter, a core component in a drip irrigation system, creates turbulent water flow by varying the flow channel structure and form, regulating water pressure and dissipating energy. This changes the flow from a jet to a dripping pattern, improving the emitter's flow stability. However, current methods for regulating water flow within an emitter are limited to adjusting the length or complexity of the emitter's flow channel design. Because the energy dissipation parameters of the emitter are fixed, it is necessary to select an emitter with appropriate energy dissipation parameters to achieve the desired irrigation flow rate. However, in actual irrigation, the required irrigation flow rates vary greatly. Therefore, preparing emitters for different flow rates complicates the use of the emitter, requiring repeated disassembly and assembly of emitters with varying energy dissipation parameters to find the appropriate emitter for the desired flow rate. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a morning glory-like flow channel emitter with adjustable hydraulic parameters and a method of use thereof, which can slow down the water flow in the drip irrigation emitter while being able to select the number of emitters according to actual conditions, quickly and freely control the size of the irrigation water flow, and is also convenient for disassembly and cleaning.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a morning glory-like flow channel emitter with adjustable hydraulic parameters, comprising a plurality of emitter units that can be spliced ​​together, wherein a bionic energy dissipation flow channel is provided in each emitter unit, wherein a water inlet and a water outlet are provided at both ends of the bionic energy dissipation flow channel, wherein one or more bionic emitter flow channel units are provided in the middle region of the bionic energy dissipation flow channel, wherein the bionic emitter flow channel unit comprises a central water-passing main flow channel, wherein a plurality of morning glory-like structured branch flow channels are provided on the side of the central water-passing main flow channel and connected thereto.

[0005] Preferably, adjacent areas of the plurality of emitter units are provided with interconnecting connection ports.

[0006] Preferably, the connectable connection port comprises an internally threaded tube at one end of one emitter unit and an externally threaded tube at one end of the other emitter unit.

[0007] Preferably, a receiving pipe is provided at the water inlet of the first emitter unit.

[0008] Preferably, the multiple branch flow channels of the morning glory structure are evenly distributed in a circular array with the central main water flow channel as the central axis.

[0009] Preferably, the four branch flow channels of the morning glory structure are evenly distributed in a circular array with the central main water flow channel as the central axis; and two bionic emitter flow channel units are provided in the bionic energy dissipation flow channel.

[0010] Preferably, one end of the branch channel of the imitation morning glory structure is connected to the input end of the central water main channel through a branch diversion point, and the other end of the branch channel of the imitation morning glory structure is connected to the output end of the central water main channel through a curved confluence point.

[0011] Preferably, a trash grid is further provided at the location of the water outlet, and the trash grid is a disc structure with a plurality of water-permeable circular holes evenly distributed on its surface.

[0012] In addition, the present invention also discloses a method for using the above-mentioned morning glory-like flow channel emitter with adjustable hydraulic parameters, which comprises the following steps:

[0013] S1: Pre-select the corresponding number of emitter units according to the required water flow rate for irrigation, then assemble and splice them together, and insert the receiving pipe of the first emitter unit into the water outlet position of the water pipe, so as to install the entire emitter;

[0014] S2: Water flows from the outlet of the water pipe into the receiving pipe, and then passes through multiple emitter units in sequence;

[0015] S3: When flowing through each emitter unit, the water first enters the bionic energy dissipation flow channel through the water inlet, and then passes through the bionic emitter flow channel unit therein to perform the energy dissipation process;

[0016] S4: The water flow that dissipates energy through the bionic emitter flow channel unit passes through the next emitter unit and finally flows out from the outlet of the last emitter unit to complete the irrigation process;

[0017] S5: If the water flow rate of the irrigation needs to be further reduced, then the corresponding number of emitter units is added; if the water flow rate of the irrigation needs to be increased, then the corresponding number of emitter units is reduced.

[0018] Furthermore, the energy dissipation process of the bionic emitter flow channel unit in S3 is as follows:

[0019] When entering the corresponding bionic emitter flow channel unit, part of the water flow enters the central water main channel, and the other part enters one end of the morning glory structure branch channel through the tributary diversion point. Then the water flows from the other end of the morning glory structure branch channel through the curved confluence, violently collides at the curved confluence to form a vortex, and merges with the water coming out of the output end of the central water main channel. During the merging process, the water coming out of the output end of the central water main channel is impacted at the confluence, slowing down the flow speed of the main water flow and producing an energy dissipation effect.

[0020] Beneficial effects of the present invention:

[0021] 1. After the water flow enters the central water flow main channel of the present invention, a part of it enters the branch channel of the imitation morning glory structure through the tributary diversion point. After the diversion, the flow velocity decreases, and the pressure is maximum at the bend of the flow channel of the imitation morning glory structure branch channel. After confluence, it violently collides at the bend confluence to form a vortex, and impacts the main water flow at the confluence, slowing down the flow velocity of the main water flow and producing an energy dissipation effect;

[0022] 2. The more emitter units connected in the present invention, the greater the number of flow channel units in the bionic emitter, and the better the energy dissipation effect. Therefore, the number of connected emitter units can be set according to the required irrigation water flow rate, thereby continuously slowing the water flow velocity in the flow channel and ultimately achieving the desired effect. It is therefore suggested that in actual application, specific use can be made according to specific circumstances. When irrigating crops with high water requirements, one or fewer emitter units can be used. When irrigating crops with low water requirements, more emitter units can be connected to improve irrigation uniformity.

[0023] 3. The trash grid in the present invention can intercept large particles. Since there is a certain spatial distance between the grid section and the flow channel, the particles are intercepted and directly accumulated in the space area between the grid section and the flow channel, rather than in the flow channel. During flushing or backwashing, the mud and sand particles can be washed away to avoid clogging the flow channel.

[0024] 4. The present invention can slow down the water flow in the drip irrigation emitter while selecting the number of emitters according to actual conditions, quickly and freely controlling the size of the irrigation water flow, and is also convenient for disassembly and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a complete structural diagram of a morning glory-like flow channel emitter with adjustable hydraulic parameters;

[0026] Figure 2 for Figure 1 1 / 4 cross-sectional structural diagram;

[0027] Figure 3 for Figure 1A schematic diagram of the enlarged structure of the bionic energy dissipation channel inside the middle emitter unit;

[0028] Figure 4 It is a schematic diagram of the enlarged structure of a trash rack of a morning glory flow channel emitter with adjustable hydraulic parameters;

[0029] Figure 5 This is a numerical simulation of the flow field pressure distribution of the fluid in a morning glory flow channel emitter with adjustable hydraulic parameters;

[0030] Figure 6 This is a velocity distribution diagram of the fluid in a numerical simulation of a morning glory flow channel emitter with adjustable hydraulic parameters;

[0031] Figure 7 The pressure-flow relationship curve of the numerical simulation of different numbers of emitter units. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1: Figures 1 to 4 The figure shows a morning glory-like flow channel emitter with adjustable hydraulic parameters. It comprises multiple connectable emitter units 1, each of which is provided with a bionic energy dissipation flow channel 2. Each end of the bionic energy dissipation flow channel 2 is provided with a water inlet 4 and a water outlet 5. One or more bionic emitter flow channel units 6 are located in the central region of the bionic energy dissipation flow channel 2. Each bionic emitter flow channel unit 6 includes a central main water channel 7, flanked by multiple connected morning glory-like branch channels 8. In this embodiment, the emitter unit 1 is cylindrical in shape, with a base radius of 7 mm and a vertical height of approximately 18 mm. The water inlet 4 is a square structure with a side length of 1.5 mm. The bionic energy dissipation flow channel 2 ranges in length from 7 to 7.5 mm.

[0034] Preferably, adjacent areas of the plurality of emitter units 1 are provided with interconnecting connection ports 3 for connection. The interconnecting connection ports 3 can be used to realize the disassembly and assembly process of the plurality of emitter units 1.

[0035] Preferably, the interconnecting connection port 3 includes an internally threaded tube 9 at one end of one emitter unit 1 and an externally threaded tube 10 at another end of the emitter unit 1. The threaded engagement of the internally threaded tube 9 and the externally threaded tube 10 facilitates assembly and disassembly of multiple emitter units 1.

[0036] Preferably, a receiving spigot 11 is provided at the water inlet 4 of the first emitter unit 1. The receiving spigot 11 is conveniently inserted into the water outlet of the water pipe to achieve the docking process between the entire emitter and the water outlet of the water pipe.

[0037] Preferably, the plurality of branch flow channels 8 imitating morning glory structures are evenly distributed in a circular array with the central main water flow channel 7 as the central axis.

[0038] Preferably, the four morning glory structure branch channels 8 are evenly distributed in a circular array with the central water main channel 7 as the central axis; and two bionic emitter channel units 6 are provided in the bionic energy dissipation channel 2.

[0039] Preferably, one end of the morning glory structure branch channel 8 is connected to the input end of the central water-passing main channel 7 through a branch diversion point 12, and the other end of the morning glory structure branch channel 8 is connected to the output end of the central water-passing main channel 7 through a curved confluence point 13. In this embodiment, when water flows through each emitter unit 1, it first enters the bionic energy dissipation flow channel 2 through the water inlet 4, and then passes through the bionic emitter flow channel unit 6 therein. At this time, part of the water flows into the central water-passing main channel 7, and the other part enters one end of the morning glory structure branch channel 8 through the branch diversion point 12. The water then flows from the other end of the morning glory structure branch channel 8 through the curved confluence point 13, violently collides with the water at the curved confluence point 13 to form a vortex, and merges with the water from the output end of the central water-passing main channel 7. During the merging process, the water at the confluence point impacts the water from the output end of the central water-passing main channel 7, slowing down the flow rate of the main water flow and having an energy dissipation effect.

[0040] Preferably, a trash grid 14 is provided at the location of the water outlet 5. The trash grid 14 is a disc-shaped structure with a plurality of water-permeable circular holes 15 evenly distributed on its surface. In this embodiment, the trash grid 14 can intercept large particles. Because the grid cross-section is spaced a certain distance from the flow channel, the intercepted particles accumulate directly in the space between the grid cross-section and the flow channel, rather than within the flow channel. During flushing or backwashing, the silt particles can be washed away, avoiding blockage of the flow channel.

[0041] In addition, the present invention also discloses a method for using the above-mentioned morning glory-like flow channel emitter with adjustable hydraulic parameters, which comprises the following steps:

[0042] S1: Preselect a corresponding number of emitter units 1 based on the required water flow rate for irrigation, then assemble and splice them together, and insert the receiving splice 11 of the first emitter unit 1 into the water outlet position of the water pipe, thereby installing the entire emitter. In this embodiment, by increasing the number of emitter units by 1, the number of flow channel units 6 of the bionic emitter increases. This reduces the flow velocity of the water flow, and the flow rate of the water flow within a certain period of time also decreases accordingly. Therefore, the corresponding number of connected emitters can be pre-set based on the required water flow rate, thereby continuously slowing the water flow velocity in the flow channel and ultimately achieving the desired effect.

[0043] S2: Water flows from the outlet of the water pipe into the receiving pipe 11, and then passes through multiple emitter units 1 in sequence;

[0044] S3: When flowing through each emitter unit 1, the water first enters the bionic energy dissipation flow channel 2 through the water inlet 4, and then passes through the bionic emitter flow channel unit 6 therein to perform the energy dissipation process;

[0045] S4: The water flow that has dissipated energy through the bionic emitter flow channel unit 6 then passes through the next emitter unit 1 and finally flows out from the water outlet 5 of the last emitter unit 1, completing the irrigation process.

[0046] S5: If the water flow rate of the irrigation needs to be further reduced, then the corresponding number of emitter units 1 is added; if the water flow rate of the irrigation needs to be increased, then the corresponding number of emitter units 1 is reduced.

[0047] Furthermore, the energy dissipation process of the bionic emitter flow channel unit 6 in S3 is as follows:

[0048] When entering the corresponding bionic emitter flow channel unit 6, part of the water flow enters the central water main channel 7, and the other part enters one end of the morning glory structure branch channel 8 through the tributary diversion point 12. Then the water flows from the other end of the morning glory structure branch channel 8 through the curved confluence 13, where it violently collides to form a vortex and merges with the water coming out of the output end of the central water main channel 7. During the merging process, the water coming out of the output end of the central water main channel 7 is impacted at the confluence, slowing down the flow speed of the main water flow and producing an energy dissipation effect.

[0049] Example 2

[0050] This embodiment uses a CFD analysis method to perform numerical simulation on the pressure distribution and velocity distribution of the fluid in the emitter flow channel.

[0051] like Figure 5 As shown, the arrow direction in the figure is the direction of water flow. Figure 5 It can be seen that the overall pressure of the fluid is relatively high when entering the first bionic emitter flow channel unit 6, and the pressure is the highest at the flow channel bend of its morning glory structure branch channel 8, while the overall pressure of the second bionic emitter flow channel unit 6 becomes smaller and the pressure is the lowest at the outlet.

[0052] like Figure 6 As shown, the arrow direction in the figure is the direction of water flow. Figure 6 It can be seen that the flow velocity in the central water main channel 7 is generally greater than the flow velocity in the morning glory structure branch channel 8. Below the confluence of the branch and the main flow, the flow velocity suddenly increases, indicating that the turbulence here is severe and the water flow energy is consumed to a large extent.

[0053] Example 3

[0054] In this embodiment, numerical simulations were performed on the emitters under four different connection numbers (1, 2, 3, and 4 emitters, respectively). Different speeds were set at the water inlet to obtain the corresponding inlet and outlet pressure differences. Based on the results, power function fitting was performed to obtain pressure-flow relationship curves and relationship equations for different numbers of emitters, as shown in Figure 2. Figure 7 As shown in the figure, the abscissa represents the inlet and outlet pressure difference p (m), and the ordinate represents the inlet flow rate Q (L / h). It can be seen that as the number of connected emitter units 1 increases, the hydraulic parameters also change. The figure shows that as the number of connected emitter units 1 increases, the flow coefficient and flow regime index gradually decrease. When there is only one emitter unit 1, the flow regime index is 0.5028, while when four emitter units 1 are connected, the flow regime index is only 0.4738, indicating better hydraulic performance than when there is only one emitter unit 1.

[0055] Combine Figure 5 and Figure 6 Analysis shows that the pressure at the inlet of the flow channel is relatively high, and the water flow rate is also high at this time. The water flows into the central water main channel 7 from the water inlet 4 of the receiving pipe 11, and a part of it enters the morning glory structure branch channel 8 for diversion through the tributary diversion point 12. After diversion, the flow rate decreases, and the pressure is maximum at the bend of the flow channel of the morning glory structure branch channel 8. After confluence, a violent collision forms a vortex at the curved confluence point 13, and impacts the main water flow at the confluence, slowing down the flow rate of the main water flow and producing an energy dissipation effect. The more the number of emitter units 1 connected, the more the number of bionic emitter flow channel units 6 increases, and the better the energy dissipation effect.

[0056] It is proposed that in actual application, it can be used according to specific circumstances. When irrigating crops with high water demand, one or fewer irrigation units 1 can be used. When irrigating crops with low water demand, more irrigation units 1 can be connected to improve irrigation uniformity.

[0057] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The embodiments and features in the embodiments of this application may be arbitrarily combined with each other unless they conflict. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A morning glory-like flow channel emitter with adjustable hydraulic parameters, characterized by: It comprises a plurality of sprinkler units (1) that can be spliced ​​together, wherein a bionic energy dissipation flow channel (2) is provided in the sprinkler unit (1), a water inlet (4) and a water outlet (5) are provided at both ends of the bionic energy dissipation flow channel (2), one or more bionic sprinkler flow channel units (6) are provided in the middle region of the bionic energy dissipation flow channel (2), the bionic sprinkler flow channel unit (6) comprises a central water main flow channel (7), and a plurality of mimic morning glory structure branch flow channels (8) connected to the central water main flow channel (7) are provided on the side of the central water main flow channel (7); Adjacent areas of the plurality of sprinkler units (1) are provided with connecting ports (3) for connection; A receiving pipe (11) is provided at the water inlet (4) of the first sprinkler unit (1); Multiple branch channels (8) with mimicking morning glory structures are evenly distributed in a circular array with the central main water channel (7) as the central axis; One end of the branch channel (8) of the imitation morning glory structure is connected to the input end of the central water main channel (7) through a branch diversion point (12), and the other end of the branch channel (8) of the imitation morning glory structure is connected to the output end of the central water main channel (7) through a curved confluence point (13).

2. The morning glory-like flow channel emitter with adjustable hydraulic parameters according to claim 1, characterized in that: The connectable connection port (3) comprises an internal threaded tube (9) located at one end of one of the emitter units (1) and an external threaded tube (10) located at one end of the other emitter unit (1).

3. The morning glory-like flow channel emitter with adjustable hydraulic parameters according to claim 1, characterized in that: Four branch flow channels (8) with a morning glory structure are evenly distributed in a circular array with the central main water flow channel (7) as the central axis; two bionic emitter flow channel units (6) are provided in the bionic energy dissipation flow channel (2).

4. The morning glory-like flow channel emitter with adjustable hydraulic parameters according to claim 1, characterized in that: A trash grid (14) is also provided at the location of the water outlet (5). The trash grid (14) is a disc structure with a plurality of water-permeable circular holes (15) evenly distributed on its surface.

5. A method for using the morning glory-like flow channel emitter with adjustable hydraulic parameters according to any one of claims 1 to 4, characterized in that: It includes the following steps: S1: Preselect a corresponding number of emitter units (1) according to the water flow rate required for irrigation, then assemble and splice them together, and insert the receiving pipe (11) of the first emitter unit (1) into the water outlet position of the water pipe, thereby installing the entire emitter; S2: Water flows from the outlet of the water pipe into the receiving pipe (11), and then passes through multiple sprinkler units (1) in sequence; S3: When flowing through each emitter unit (1), the water first enters the bionic energy dissipation flow channel (2) through the water inlet (4), and then passes through the bionic emitter flow channel unit (6) therein to perform the energy dissipation process; S4: The water flow that has dissipated energy through the bionic emitter flow channel unit (6) then passes through the next emitter unit (1) and finally flows out from the outlet (5) of the last emitter unit (1), thus completing the irrigation process; S5: If the water flow rate of the irrigation needs to be further reduced, then the corresponding number of the irrigation units (1) is increased; if the water flow rate of the irrigation needs to be increased, then the corresponding number of the irrigation units (1) is reduced.

6. The method for using the morning glory-like flow channel emitter with adjustable hydraulic parameters according to claim 5, characterized in that: The energy dissipation process of the bionic emitter flow channel unit (6) in S3 is as follows: When entering the corresponding bionic irrigator flow channel unit (6), part of the water flow enters the central water flow main channel (7), and the other part enters one end of the morning glory structure branch channel (8) through the branch diversion point (12). Then, the water flows from the other end of the morning glory structure branch channel (8) through the curved confluence point (13), violently collides at the curved confluence point (13) to form a vortex, and merges with the water coming out of the output end of the central water flow main channel (7). During the merging process, the water coming out of the output end of the central water flow main channel (7) is impacted at the confluence point, slowing down the flow speed of the main water flow and producing an energy dissipation effect.

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