Irrigation canal splicing module with double-helix flow guide rib structure

Abstract

The invention discloses an irrigation canal assembly module with a double-helix flow guide rib structure, which comprises a prefabricated canal body module and two flow guide ribs, the flow guide ribs are arranged on the side wall of the prefabricated canal body module, the thickness of the flow guide ribs is gradually reduced in a gradient manner along the water flow direction, the section shape of each flow guide rib is a sinusoidal waveform, and the flow guide ribs are arranged in the prefabricated canal body module. Every two flow guide ribs have a phase difference, each flow guide rib is provided with a plurality of gradually-shrinking hole arrays which are repeated in the water flow direction, the hole diameters in the gradually-shrinking hole arrays are gradually decreased in the water flow direction in a gradient mode, and the hole distances are gradually increased in the water flow direction in a gradient mode. According to the technical scheme, the main flow is divided into the multiple sub-flows through the two flow guide ribs, the local flow speed is increased, the two flow guide ribs are arranged to have the phase difference, a hedging turbulent flow field is formed, the gradual shrinkage hole array is arranged to induce local eddy currents, the purposes of silt prevention and self-cleaning are achieved, the irrigation requirement is met, and meanwhile the suspended matter sedimentation rate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural irrigation, and in particular to an irrigation channel assembly module with a double-helix guide rib structure. Background Art

[0002] In the field of agricultural irrigation technology, the current mainstream irrigation systems mainly include two technical solutions: open channel irrigation system and pipe irrigation system. The pipe irrigation system is characterized by a PVC water pipe network combined with solenoid valve control. Its limitations are that it is limited by the pipe diameter (≤300mm) and the maximum flow rate of the system is insufficient (≤500m 3 / h), making it difficult to meet the needs of large-scale field irrigation. Open channel irrigation systems are typically characterized by open concrete combined with manual gate control. Although they meet the needs of large-scale field irrigation, the uneven flow velocity distribution (Reynolds number Re>5000) forms a low-speed retention zone (flow velocity difference>0.3m / s). Experimental data show that: at a 1% slope, the central flow velocity is 2.1m / s, while near the channel wall it is only 0.8m / s. The suspended solids settling rate exceeds the standard (>15g / (m·h)), the sediment deposition rate is high (3-5cm / month), the annual silt volume is large (>12,000 tons), the head loss is large (0.15-0.25m / km), energy consumption increases by 25%, and the cost of manual dredging is high (annual cost exceeds 100 yuan / mu).

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

[0004] The purpose of the present invention is to provide an irrigation channel assembly module with a double-helix guide rib structure that can achieve anti-siltation and self-cleaning of the irrigation channel, meet irrigation needs and reduce the sedimentation rate of suspended matter.

[0005] To achieve the above-mentioned object, the present invention provides an irrigation channel assembly module with a double-helix guide rib structure, comprising:

[0006] Prefabricated channel modules;

[0007] Two guide ribs are respectively provided on the side walls of the prefabricated channel module, the thickness of the guide ribs gradually decreases 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 tapered hole arrays repeated along the water flow direction, wherein the hole diameter in the tapered hole array decreases gradually along the water flow direction, and the hole spacing increases gradually along the water flow direction.

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

[0010] Optionally, the cross-section of the prefabricated channel module is rectangular, having a depth H and a width B;

[0011] The center of one of the guide ribs is 0.1B-0.2B away from the side wall on which it is installed, and 0.6H-0.7H away from the bottom;

[0012] The center of another guide rib is 0.1B-0.2B away from the side wall on which it is installed, and 0.2H-0.3H away 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 more than 20°.

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

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

[0016] Optionally, the hole density of the tapered hole array along the water flow direction is 20-30 holes / 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 ribs are made of any one of bamboo fiber, regenerated bamboo fiber or regenerated PP composite material, and the surface of the guide ribs is formed into a bionic hydrophobic surface by laser etching.

[0019] Optionally, the irrigation channel assembly module with a double-helix guide rib structure further includes:

[0020] A connecting piece, used for fixedly connecting the guide rib to the side wall of the prefabricated channel module;

[0021] The side wall of the prefabricated channel module is provided with an installation groove extending along the water flow direction, and the installation groove is used to install the connecting piece;

[0022] At least three groups of elastic members are arranged per meter in the installation groove along the water flow direction to achieve a fastening connection.

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

[0024] The irrigation canal assembly module with a double-helix guide rib structure provided by the present invention includes a prefabricated canal module and two guide ribs. The guide ribs are arranged on the side walls of the prefabricated canal module. The thickness of the guide ribs decreases gradually along the direction of water flow. The cross-sectional shape of the guide ribs is a sine waveform, and the two guide ribs have a phase difference. The guide ribs are provided with a plurality of tapered hole arrays repeated along the direction of water flow. The apertures in the tapered hole arrays decrease gradually along the direction of water flow, and the hole spacing increases gradually along the direction of water flow. The technical solution of the present invention divides the main flow into multiple sub-flows by two guide ribs to increase the local flow velocity. The two guide ribs are arranged with a phase difference to form a counter-turbulent flow field. The tapered hole array is provided to induce local vortexes to achieve the purpose of anti-siltation and self-cleaning, meeting irrigation needs while reducing the sedimentation rate of suspended matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic cross-sectional view of an irrigation channel assembly module having a double-helix guide rib structure according to an embodiment of the present invention;

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

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

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

[0029] Description of reference numerals:

[0030] 100- Prefabricated channel module; 110- Installation groove; 200- Guide rib; 210- Connector. DETAILED DESCRIPTION

[0031] The following is a further detailed description of an irrigation canal assembly module with a double-helix guide rib structure proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purposes, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention, so they have no technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0032] See also Figure 1 , Figure 1 This is a cross-sectional schematic diagram of an irrigation channel assembly module with a double-helix guide rib structure according to an embodiment of the present invention, comprising a prefabricated channel body module 100 and two guide ribs 200. The two guide ribs 200 are respectively installed on the side walls of the prefabricated channel body module 100, and the thickness of the guide ribs 200 gradually decreases along the direction of water flow; the cross-sectional shape of the guide ribs 200 is a sine wave, and the two guide ribs 200 have a phase difference; the guide ribs 200 are provided with a plurality of tapered hole arrays repeated along the direction of water flow, the aperture in the tapered hole array gradually decreases along the direction of water flow, and the hole spacing gradually increases along the direction of water flow.

[0033] The irrigation channel 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, thereby increasing the local flow velocity. The two guide ribs 200 are arranged with a phase difference to form an offset turbulent field, and a tapered hole array is arranged to induce local vortexes to achieve the purpose of anti-siltation and self-cleaning, thereby meeting irrigation needs while reducing the suspended matter sedimentation rate.

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

[0035] In some embodiments, the cross-section of the prefabricated channel module 100 is rectangular, with a depth H and a width B. 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 limited to ensure that the water flow disturbance covers the entire cross-section of the channel. In this embodiment, continue to refer to Figure 1 The center of the guide rib 200 on the left is 0.15B away from the side wall on which it is installed and 2 / 3H away from the bottom. The center of the guide rib 200 on the right is 0.15B away from the side wall on which it is installed and 0.25H away from the bottom.

[0036] In some embodiments, in the sinusoidal cross-section 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 no more 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, each having a decreasing thickness along the water flow direction. The transition section is longer than the inlet and outlet sections. Specifically, in this embodiment, the prefabricated channel module 100 extends a length L along the water flow direction. The inlet section is 0.3L long, the transition section is 0.4L long, and the outlet section is 0.3L long.

[0038] In some embodiments, the guide rib 200 has a thickness of 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 local eddy coverage induced by the tapered hole array and avoids disturbance blind spots.

[0040] In some embodiments, the aperture of the tapered hole array is 3-5 mm, and the hole 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 tapered hole array is arranged along the water flow direction, with the hole diameter showing a gradient change of 5mm, 4mm, and 3mm, and the hole spacing showing a gradient change of 20mm, 30mm, and 40mm.

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

[0042] In some embodiments, the irrigation channel assembly module with a double spiral guide rib structure further includes a connector 210, which is used to securely connect the guide rib 200 to the side wall of the prefabricated channel module 100. Figure 3 , Figure 3 This is a schematic cross-sectional view of a guide rib 200 provided in one embodiment of the present invention. Figure 3 The guide ribs 200 are fixedly connected to the side walls of the prefabricated channel module 100 by means of mortise and tenon joints through connectors 210. Figure 4 , Figure 4This is a partial schematic diagram of a prefabricated channel module 100 according to one embodiment of the present invention. The sidewalls of the prefabricated channel module 100 are provided with mounting grooves 110 extending in the direction of water flow. These grooves 110 are used to insert connectors 210 to achieve a mortise and tenon joint. Furthermore, elastic members may be provided within the mounting grooves 110 to reinforce the mortise and tenon joint between the guide ribs 200 and the prefabricated channel module 100. In this embodiment, at least three sets of elastic members are provided per meter within the mounting grooves 110 along the direction of water flow. In other embodiments, other numbers of elastic members may be provided, and this embodiment does not specifically limit this.

[0043] In this embodiment, the sinusoidal waveform cross section of the guide rib 200 and the tapered hole array work together to significantly reduce the characteristic scale of the water flow, and the hydraulic diameter D h Reduce by 30%-50% and increase the local flow velocity by 40%-60% at the same time, so that the Reynolds number exceeds the critical value Recrit=4000, thereby strengthening the turbulent effect. The secondary flow induced is quantitatively characterized by the Dean number. In this design, r=0.15m, R=1.2m, and D is calculated. n =4,242>>100, indicating that the Dean vortex significantly enhances turbulent mixing.

[0044] Suspended matter sedimentation is suppressed through two mechanisms: first, the turbulent kinetic energy k is increased to 2.3 times that of the traditional structure, and the suspended matter diffusion coefficient D is increased to 1.3 times that of the traditional structure. t Increased to 3.1 times, significantly delaying particle sedimentation; secondly, the geometric design of the guide rib 200 makes the wall shear stress τ b Increased from 0.8Pa to 2.1Pa, exceeding the critical starting shear stress τ of typical sediment c =1.2Pa, effectively stripping off the sediment.

[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 arranged on the side walls of the prefabricated canal module 100. The thickness of the guide ribs 200 decreases gradually along the direction of water flow. The cross-sectional shape of the guide ribs 200 is a sine wave, and the two guide ribs 200 have a phase difference. The guide ribs 200 are provided with a plurality of tapered hole arrays repeated along the direction of water flow, the aperture of the tapered hole array decreases gradually along the direction of water flow, and the hole spacing increases gradually along the direction of water flow. The technical solution of the present invention is to divide the main flow into multiple sub-flows by two guide ribs 200 to increase the local flow velocity, set the two guide ribs 200 with a phase difference to form a counter-turbulent flow field, and set the tapered hole array to induce local vortexes to achieve the purpose of anti-siltation and self-cleaning, meeting irrigation needs while reducing the suspended matter sedimentation rate.

[0046] In the description of the present invention, it should be understood that the terms "center," "height," "thickness," "up," "down," "vertical," "horizontal," "top," "bottom," "inside," "outside," "axial," "radial," "circumferential," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0047] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0048] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. An irrigation channel assembly module with a double-helix guide rib structure, characterized in that: include: Prefabricated channel modules; Two guide ribs are respectively provided on the side walls of the prefabricated channel module, the thickness of the guide ribs gradually decreases 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 tapered hole arrays repeated along the water flow direction, wherein the hole diameter in the tapered hole array decreases gradually along the water flow direction, and the hole spacing increases gradually along the water flow direction.

2. The irrigation channel assembly module with a double-helix guide rib structure according to claim 1, characterized in that: The phase difference between the two guide ribs is 180°.

3. The irrigation channel assembly module with a double-helix guide rib structure according to claim 1, characterized in that: The cross-section of the prefabricated channel module is rectangular, with a depth H and a width B; The center of one of the guide ribs is 0.1B-0.2B away from the side wall on which it is installed, and 0.6H-0.7H away from the bottom; The center of another guide rib is 0.1B-0.2B away from the side wall on which it is installed, and 0.2H-0.3H away from the bottom.

4. The irrigation channel assembly module with a double-helix guide rib structure according to 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 more than 20°.

5. The irrigation channel assembly module with a double-helix guide rib structure according to claim 1, characterized in that: The guide rib includes an inlet section, a transition section, and an outlet end, the thickness of which decreases along the water flow direction. The length of the transition section is greater than that of the inlet section and the outlet section.

6. The irrigation channel assembly module with a double-helix guide rib structure according to claim 1, characterized in that: The thickness of the guide rib is 20-25 mm.

7. The irrigation channel assembly module with a double-helix guide rib structure according to claim 1, characterized in that: The hole density of the tapered hole array along the water flow direction is 20-30 holes per meter.

8. The irrigation channel assembly module with a double-helix guide rib structure according to claim 1, characterized in that: The aperture of the tapered hole array is 3-5 mm, and the hole spacing is 20-40 mm.

9. The irrigation channel assembly module with a double-helix guide rib structure according to claim 1, characterized in that: The guide ribs are made of any one of bamboo fiber, regenerated bamboo fiber or regenerated PP composite material, and the surfaces of the guide ribs are formed into bionic hydrophobic surfaces by laser etching.

10. The irrigation channel assembly module with a double-helix guide rib structure according to claim 1, characterized in that: Also includes: A connecting piece, used for fixedly connecting the guide rib to the side wall of the prefabricated channel module; The side wall of the prefabricated channel module is provided with an installation groove extending along the water flow direction, and the installation groove is used to install the connecting piece; At least three groups of elastic members are arranged per meter in the installation groove along the water flow direction to achieve a fastening connection.

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