An irrigation canal assembly module with double helix flow guide rib structure

Abstract

The application discloses an irrigation canal assembling module with double-helix flow guide rib structures, which comprises a prefabricated canal body module and two flow guide ribs, the flow guide ribs are arranged on the side walls of the prefabricated canal body module, the thickness of the flow guide ribs decreases along the water flow direction, the cross-sectional shape of the flow guide ribs is a sine wave shape, and the two flow guide ribs have a phase difference, the flow guide ribs are provided with a plurality of tapered hole arrays which are repeated along the water flow direction, the hole diameter of the tapered hole arrays decreases along the water flow direction, and the hole spacing increases along the water flow direction. According to the technical scheme of the application, the main flow is divided into a plurality of sub-flows by the two flow guide ribs, the local flow rate is improved, the two flow guide ribs are arranged to have a phase difference, a colliding turbulent flow field is formed, the tapered hole arrays are arranged to induce local vortex flow, and the purposes of preventing siltation and self-cleaning are achieved, the irrigation demand is met, and the suspended matter settlement rate is reduced.

Description

Technical Field

[0001] This invention relates to the field of agricultural irrigation technology, and in particular to an irrigation canal assembly module with a double-helix flow guide rib structure. Background Technology

[0002] In the field of agricultural irrigation technology, the current mainstream irrigation systems mainly include two types of technical solutions: open channel irrigation systems and pipeline irrigation systems. Pipeline irrigation systems are characterized by PVC water supply networks combined with solenoid valve control. Their limitations lie in the restriction of pipe diameter (≤300mm) and insufficient maximum system flow rate (≤500m³ / h). 3 The current system, characterized by open concrete structures combined with manual gate control, is insufficient to meet the irrigation needs of large fields. While it meets the irrigation requirements of large fields, the uneven flow velocity distribution (Reynolds number Re > 5000) creates a low-velocity stagnation zone (velocity difference > 0.3 m / s). Experimental data shows that at a 1% slope, the central flow velocity is 2.1 m / s, while near the canal wall it is only 0.8 m / s. The suspended solids settling rate exceeds the standard (> 15 g / (m·h)), the sediment deposition rate is high (3-5 cm / month), the annual silt volume is large (> 12,000 tons), the head loss is large (0.15-0.25 m / km), energy consumption increases by 25%, and the cost of manual dredging is high (annual cost greater than 100 yuan / mu).

[0003] Therefore, it is necessary to propose a new irrigation canal assembly module with a double-helix flow guide rib structure. Summary of the Invention

[0004] The purpose of this invention is to provide an irrigation canal assembly module with a double-helix flow guide rib structure that can achieve silt prevention and self-cleaning of irrigation canals, thereby meeting irrigation needs while reducing the settling rate of suspended solids.

[0005] To achieve the above objectives, the present invention provides an irrigation canal assembly module with a double-helix flow-guiding rib structure, comprising:

[0006] Prefabricated channel modules;

[0007] Two guide ribs are respectively disposed on the side wall of the prefabricated channel module. The thickness of the guide ribs decreases gradually along the water flow direction. The cross-sectional shape of the guide ribs is a sine wave, and the two guide ribs have a phase difference.

[0008] The guide rib is provided with a plurality of repeating arrays of tapering holes along the water flow direction. The diameter of the holes in the array decreases gradually along the water flow direction, while the spacing between the holes increases gradually along the water flow direction.

[0009] Optionally, the phase difference between the two guide ribs is 180°.

[0010] Optionally, the prefabricated channel module has a rectangular cross-sectional shape, with a depth H and a width B;

[0011] The center of one of the guide ribs is 0.1B-0.2B from the side wall where it is installed and 0.6H-0.7H from the bottom.

[0012] The center of the other guide rib is 0.1B-0.2B from the side wall where it is installed and 0.2H-0.3H from the bottom.

[0013] Optionally, in the cross-section of the sinusoidal waveform of the guide rib, the guide rib is centrally symmetrical, and the angle between the line connecting the edge and the center and the horizontal direction is no greater than 20°.

[0014] Optionally, the guide rib includes an inlet section, a transition section, and an outlet end with decreasing thickness along the water flow direction, wherein the length of the transition section is greater than that of the inlet section and the outlet section.

[0015] Optionally, the thickness of the guide rib is 20-25 mm.

[0016] Optionally, the pore density of the tapered pore array along the water flow direction is 20-30 pores / meter.

[0017] Optionally, the aperture of the tapered hole array is 3-5 mm, and the hole spacing is 20-40 mm.

[0018] Optionally, the guide rib is made of any one of bamboo fiber, recycled bamboo fiber or recycled PP composite material, and the surface of the guide rib is formed into a biomimetic hydrophobic surface by laser etching.

[0019] Optionally, the irrigation canal assembly module with the double-helix flow-guiding rib structure further includes:

[0020] A connector for fixing the guide rib to the side wall of the prefabricated channel module;

[0021] The prefabricated channel module has an installation groove extending along the water flow direction on its side wall, and the installation groove is used to install the connector.

[0022] At least three sets of elastic elements are installed per meter along the water flow direction in the installation groove to achieve a tight connection.

[0023] Compared with the prior art, the present invention has at least the following advantages:

[0024] The irrigation canal assembly module with a double-helix guide rib structure provided by this invention includes a prefabricated canal body module and two guide ribs. The guide ribs are disposed on the sidewall of the prefabricated canal body module. The thickness of the guide ribs gradually decreases along the water flow direction. The cross-sectional shape of the guide ribs is sinusoidal, and the two guide ribs have a phase difference. The guide ribs are provided with multiple repeating arrays of tapered holes along the water flow direction. In the array of tapered holes, the hole diameter gradually decreases along the water flow direction, and the hole spacing gradually increases along the water flow direction. The technical solution of this invention divides the main flow into multiple sub-flows through the two guide ribs, increasing the local flow velocity. The phase difference between the two guide ribs forms a counter-turbulent flow field, and the tapered hole array induces local eddies to achieve the purpose of silt prevention and self-cleaning, meeting irrigation needs while reducing the settling rate of suspended solids. Attached Figure Description

[0025] Figure 1 This is a cross-sectional schematic diagram of an irrigation canal assembly module with a double-helix flow-guiding rib structure according to an embodiment of the present invention;

[0026] Figure 2 This is a top view of a guide rib according to an embodiment of the present invention;

[0027] Figure 3 A schematic cross-sectional view of a flow guide rib provided in an embodiment of the present invention;

[0028] Figure 4 This is a partial schematic diagram of a prefabricated channel module provided in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100 - Prefabricated channel module; 110 - Installation slot; 200 - Guide rib; 210 - Connector. Detailed Implementation

[0031] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the irrigation canal assembly module with a double-helix flow-guiding rib structure proposed in this invention. The advantages and features of this invention will become clearer from the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the embodiments of this invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0032] Please see Figure 1 , Figure 1 This is a cross-sectional schematic diagram of an irrigation canal assembly module with a double-helix flow guide rib structure according to an embodiment of the present invention. It includes a prefabricated canal module 100 and two flow guide ribs 200. The two flow guide ribs 200 are respectively installed on the side wall of the prefabricated canal module 100, and the thickness of the flow guide ribs 200 decreases gradually along the water flow direction. The cross-sectional shape of the flow guide ribs 200 is a sine wave, and the two flow guide ribs 200 have a phase difference. The flow guide ribs 200 are provided with a plurality of repeating tapered hole arrays along the water flow direction. In the tapered hole array, the hole diameter decreases gradually along the water flow direction, and the hole spacing increases gradually along the water flow direction.

[0033] The irrigation canal assembly module with a double-helix guide rib structure provided in this embodiment divides the main flow into multiple sub-flows through two guide ribs 200, increases the local flow velocity, sets the two guide ribs 200 with a phase difference to form a counter-turbulent flow field, and sets a tapered hole array to induce local eddies, so as to achieve the purpose of silt prevention and self-cleaning, and reduce the settling rate of suspended solids while meeting irrigation needs.

[0034] In some embodiments, continue reading Figure 1 The two guide ribs 200 have a phase difference of 180°, forming a maximum counter-turbulent flow field, reducing the velocity difference between the water flow center and the channel wall, and reducing the proportion of the low-velocity zone. In other embodiments, the phase difference can be set to other values, which are not specifically limited here.

[0035] In some embodiments, the prefabricated channel module 100 has a rectangular cross-sectional shape, with a depth H and a width B; wherein, the center of one guide rib 200 is 0.1B-0.2B from the side wall where it is installed and 0.6H-0.7H from the bottom; the center of the other guide rib 200 is 0.1B-0.2B from the side wall where it is installed and 0.2H-0.3H from the bottom. The installation positions of the two guide ribs 200 are restricted to ensure that water flow disturbance covers the entire cross-section of the channel. In this embodiment, refer to... Figure 1 The center of the left guide rib 200 is 0.15B from the side wall where it is installed and 2 / 3H from the bottom. The center of the right guide rib 200 is 0.15B from the side wall where it is installed and 0.25H from the bottom.

[0036] In some embodiments, in the cross section of the sinusoidal waveform of the guide rib 200, the guide rib 200 is centrally symmetrical, and the angle between the line connecting the edge and the center and the horizontal direction is not greater than 20°. In this embodiment, the angle between the line connecting the edge and the center and the horizontal direction is set to 15°.

[0037] In some embodiments, the guide rib 200 includes an inlet section, a transition section, and an outlet end with decreasing thickness along the water flow direction, wherein the length of the transition section is greater than that of the inlet section and the outlet section. Specifically, in this embodiment, the prefabricated channel module 100 extends for a length L along the water flow direction, with the length of the inlet section being 0.3L, the length of the transition section being 0.4L, and the length of the outlet section being 0.3L.

[0038] In some embodiments, the thickness of the guide rib 200 is 20-25 mm. Specifically, in this embodiment, the thickness of the inlet section is 25 mm, the thickness of the transition section is 20 mm, and the thickness of the outlet section is 15 mm.

[0039] In some embodiments, the hole density of the tapered hole array along the water flow direction is 20-30 holes / meter, which improves the coverage of the local eddy current induced by the tapered hole array and avoids disturbance blind spots.

[0040] In some embodiments, the aperture diameter in the tapered aperture array is 3-5 mm, and the aperture spacing is 20-40 mm. Specifically, in this embodiment, please refer to... Figure 2 , Figure 2 This is a top view of a guide rib 200 according to an embodiment of the present invention. The array of tapered holes is arranged along the direction of water flow, with the hole diameters varying in gradients of 5mm, 4mm, and 3mm, and the hole spacing varying in gradients of 20mm, 30mm, and 40mm.

[0041] In some embodiments, the flow guide rib 200 is made of any one of bamboo fiber, recycled bamboo fiber or recycled PP composite material, and the surface of the flow guide rib 200 is formed into a biomimetic hydrophobic surface by laser etching.

[0042] In some embodiments, the irrigation canal assembly module with a double-helix guide rib structure further includes a connector 210, which is used to fix the guide rib 200 to the side wall of the prefabricated canal module 100. See also... Figure 3 , Figure 3 This is a cross-sectional schematic diagram of the guide rib 200 provided in an embodiment of the present invention. Figure 3 The guide rib 200 shown is fixedly connected to the side wall of the prefabricated channel module 100 via a tenon-and-mortise connection using connector 210. Please refer to... Figure 4 , Figure 4This is a partial schematic diagram of a prefabricated channel module 100 according to an embodiment of the present invention. The prefabricated channel module 100 has an installation groove 110 extending along the water flow direction on its side wall. The installation groove 110 is used for inserting a connector 210 to achieve a mortise and tenon connection. More specifically, elastic elements may also be provided within the installation groove 110 to reinforce the mortise and tenon connection between the guide rib 200 and the prefabricated channel module 100. In this embodiment, at least three sets of elastic elements are provided per meter along the water flow direction within the installation groove 110. In other embodiments, other numbers of elastic elements may be provided; this embodiment does not impose specific limitations.

[0043] In this embodiment, the sinusoidal cross-section of the guide rib 200 and the tapered orifice array work together to significantly reduce the characteristic scale of the water flow, thereby reducing the hydraulic diameter D. h By reducing the Reynolds number by 30%-50% while simultaneously increasing the local velocity by 40%-60%, the Reynolds number is pushed above the critical value of Recrit = 4000, thereby enhancing the turbulence effect. The resulting secondary flow is quantitatively characterized by the Dean number. In this design, r = 0.15m, R = 1.2m, and the calculated D... n =4,242>>100, indicating that the Dean vortex significantly enhances turbulent mixing.

[0044] Suspended solids sedimentation is suppressed through two mechanisms: firstly, the turbulent kinetic energy k is increased to 2.3 times that of the traditional structure, and the suspended solids diffusion coefficient D... t The increase to 3.1 times significantly slows down particle settling; secondly, the geometric design of the 200-degree guide rib reduces the wall shear stress τ. b The pressure increased from 0.8 Pa to 2.1 Pa, exceeding the typical critical initiation shear stress τ for sediment. c =1.2Pa, effectively stripping sediments.

[0045] In summary, the irrigation canal assembly module with a double-helix guide rib structure provided by the present invention includes a prefabricated canal module 100 and two guide ribs 200. The guide ribs 200 are disposed on the side wall of the prefabricated canal module 100. The thickness of the guide ribs 200 gradually decreases along the water flow direction. The cross-sectional shape of the guide ribs 200 is a sinusoidal waveform, and the two guide ribs 200 have a phase difference. The guide ribs 200 are provided with a plurality of repeating tapered hole arrays along the water flow direction. In the tapered hole array, the hole diameter gradually decreases along the water flow direction, and the hole spacing gradually increases along the water flow direction. The technical solution of the present invention divides the main flow into multiple sub-flows by the two guide ribs 200, thereby increasing the local flow velocity. The phase difference between the two guide ribs 200 forms a counter-turbulent flow field, and the tapered hole array induces local eddies to achieve the purpose of silt prevention and self-cleaning, meeting irrigation needs while reducing the settling rate of suspended solids.

[0046] In the description of this invention, it should be understood that the terms "center," "height," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. An irrigation canal assembly module with a double-helix flow-guiding rib structure, characterized in that, include: Prefabricated channel modules; Two guide ribs are respectively disposed on the side wall of the prefabricated channel module. The thickness of the guide ribs decreases gradually along the water flow direction. The cross-sectional shape of the guide ribs is a sine wave, and the two guide ribs have a phase difference. The guide rib is provided with a plurality of repeating arrays of tapering holes along the water flow direction. The diameter of the holes in the array decreases gradually along the water flow direction, while the spacing between the holes increases gradually along the water flow direction.

2. The irrigation canal assembly module with a double-helix flow-guiding rib structure as described in claim 1, characterized in that, The phase difference between the two guide ribs is 180°.

3. The irrigation canal assembly module with a double-helix flow-guiding rib structure as described in claim 1, characterized in that, The prefabricated channel module has a rectangular cross-sectional shape, with a depth H and a width B; The center of one of the guide ribs is 0.1B-0.2B from the side wall where it is installed and 0.6H-0.7H from the bottom. The center of the other guide rib is 0.1B-0.2B from the side wall where it is installed and 0.2H-0.3H from the bottom.

4. The irrigation canal assembly module with a double-helix flow-guiding rib structure as described in claim 1, characterized in that, In the cross-section of the sinusoidal waveform of the guide rib, the guide rib is centrally symmetrical, and the angle between the line connecting the edge and the center and the horizontal direction is no greater than 20°.

5. The irrigation canal assembly module with a double-helix flow-guiding rib structure as described in claim 1, characterized in that, The guide rib includes an inlet section, a transition section, and an outlet section with decreasing thickness along the water flow direction, wherein the length of the transition section is greater than that of the inlet section and the outlet section.

6. The irrigation canal assembly module with a double-helix flow-guiding rib structure as described in claim 1, characterized in that, The thickness of the guide rib is 20-25mm.

7. The irrigation canal assembly module with a double-helix flow-guiding rib structure as described in claim 1, characterized in that, The pore density of the tapered pore array along the water flow direction is 20-30 pores / meter.

8. The irrigation canal assembly module with a double-helix flow-guiding rib structure as described in claim 1, characterized in that, The aperture of the tapered hole array is 3-5mm, and the hole spacing is 20-40mm.

9. The irrigation canal assembly module with a double-helix flow-guiding rib structure as described in claim 1, characterized in that, The flow guide rib is made of any one of bamboo fiber, recycled bamboo fiber or recycled PP composite material, and the surface of the flow guide rib is formed into a biomimetic hydrophobic surface by laser etching.

10. The irrigation canal assembly module with a double-helix flow-guiding rib structure as described in claim 1, characterized in that, Also includes: A connector for fixing the guide rib to the side wall of the prefabricated channel module; The prefabricated channel module has an installation groove extending along the water flow direction on its side wall, and the installation groove is used to install the connector. At least three sets of elastic elements are installed per meter along the water flow direction in the installation groove to achieve a tight connection.

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