Agricultural irrigation canal for water conservancy project

Abstract

The invention belongs to the technical field of irrigation canals, and particularly relates to an agricultural irrigation canal for hydraulic engineering, which comprises a canal body, a sealing strip, a desilting basin and a sand cleaning device, the silt carrying capacity is greatly improved through the U-shaped cross section and the spiral flow guide groove, so that the spacing distance of the desilting basins can be increased, the number of the desilting basins and the number of the sand cleaning devices used in the water channel with the same length are reduced, and the investment cost for constructing the water channel is saved to a certain extent; in addition, the spiral flow guide grooves guide water flow to rotate and enable silt and water to be layered at the same time, specifically, the silt is conveyed forwards close to the inner wall of the channel body under the action of centrifugal force, and the width and depth of the inner wall of the desilting basin are larger than those of the channel body; and therefore, silt carried in water flow flowing through the desilting basin is attached to the inner wall of the desilting basin under the action of centrifugal force, the silt is left in the desilting basin to the maximum extent, and the desilting efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of irrigation canal technology, specifically an agricultural irrigation canal used in water conservancy projects. Background Art

[0002] Water conservancy projects are engineering projects built to control and regulate surface water and groundwater in nature to achieve the purpose of eliminating harm and promoting benefits. When diverting water resources in water conservancy projects, irrigation canals are generally used. Irrigation canals are waterways that connect irrigation water sources and irrigated land, and can transport and distribute the water drawn from the water source to various parts of the irrigation area.

[0003] However, current irrigation canals, while equipped with sedimentation basins that are regularly cleaned, suffer from slow water flow, resulting in limited sediment-carrying capacity. Consequently, a significant amount of sediment accumulates in the canals after a period of use, impacting water delivery and irrigation efficiency. Furthermore, the lack of timely removal of sediment makes the water flow carry a large amount of sediment, potentially clogging subsequent diversion valves and requiring regular manual cleaning. This significantly increases the difficulty and time required for cleaning, ultimately impacting farmland irrigation. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes an agricultural irrigation canal for water conservancy projects. This invention primarily addresses the problem that existing irrigation canals have slow water flow rates, resulting in weak sediment-carrying capacity. Consequently, after a period of use, a large amount of sediment accumulates in the canal, affecting not only the water delivery capacity and irrigation efficiency but also the problem that the sediment, if not promptly removed, carries a high sediment load in the water flow, easily causing blockages in subsequent diversion valves.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: This invention provides an agricultural irrigation canal for water conservancy projects, including a canal body, sealing strips, a sedimentation tank, and a sand-removing device; the canal bodies are connected end to end, and adjacent canal bodies are sealed with sealing strips; the cross-section of the canal body is U-shaped; a spiral guide channel is provided on the inner wall of the canal body; a sedimentation tank is provided at intervals of several canal bodies; the depth of the sedimentation tank is greater than the depth of the canal body; the two ends of the sedimentation tank are sealed to the end faces of the canal body on both sides with structural adhesive; the sand-removing device is provided inside the sedimentation tank; the sand-removing device is used to remove sand from the sedimentation tank.

[0006] This project utilizes a U-shaped cross-section channel with spiral guide channels on its inner wall. This not only increases the flow velocity of water due to the U-shaped cross-section but also causes the water to rotate in a spiral motion while flowing, thus improving the water's ability to carry sediment. Combined with sedimentation basins spaced 20-25 meters apart, this ensures that no sediment accumulates in the channel, guaranteeing efficient water flow. Furthermore, when diverting water to farmland, this not only reduces the risk of control valve blockage but also improves the accuracy of water volume control, thereby maximizing irrigation effectiveness. This project significantly improves the sediment carrying capacity by using a U-shaped cross-section and a spiral guide channel, thereby allowing for longer intervals between sedimentation tanks. This reduces the number of sedimentation tanks and sand-clearing devices required for a given length of canal, saving on canal construction costs. Furthermore, the spiral guide channel guides the water flow in a rotating manner, causing sediment and water to separate. Specifically, the sediment is transported forward towards the inner wall of the canal under centrifugal force. Since the width and depth of the sedimentation tank's inner wall are greater than those of the canal, the sediment carried by the water flowing through the sedimentation tank adheres to the inner wall of the sedimentation tank under centrifugal force, maximizing sediment retention and improving sedimentation efficiency.

[0007] Preferably, the bottom of the channel body is provided with multiple seepage holes at intervals; the diameter of the seepage holes is 1.8-2.3mm; the seepage holes are radially distributed along the arc surface of the channel body.

[0008] By setting seepage holes to balance the water pressure difference between the inside and outside of the canal, the hydrostatic pressure on the canal is reduced, thereby preventing the canal from cracking due to long-term water overload and thus improving the service life of the canal. Moreover, when the groundwater freezes and expands in winter, the seepage holes drain the excess water from the canal, thereby reducing the damage to the canal by frost heave and further improving the service life of the canal.

[0009] With a φ2mm perforation hole diameter and a 20cm spacing, a single hole can achieve a drainage capacity of ≥0.8L / min, thus meeting the drainage needs of the channel while avoiding excessive drainage that could lead to structural instability. This is because an excessively large hole diameter can cause a sudden increase in local flow velocity, such as a flow velocity of 2.5m / s at the φ5mm hole opening, which accelerates the erosion of the hole wall. In contrast, a φ2mm hole diameter can control the flow velocity at the hole opening to 0.8-1.2m / s, thus matching the overall flow velocity of the guide channel, which is 1.0-1.67m / s.

[0010] Preferably, nylon filament bundles are arranged axially inside the seepage holes; the two ends of the nylon filament bundles are respectively anchored to the inner wall of the guide channel and the outer wall of the channel by a clamping buckle; a coarse sand layer, a gravel layer and a geotextile are respectively arranged from top to bottom below the channel corresponding to the position of the seepage holes.

[0011] First, the nylon filament bundles installed inside the seepage holes effectively trap 0.5mm particles. Then, the three-stage reverse filtration structure consisting of a 2cm thick coarse sand layer, a 3cm thick gravel layer, and geotextile further reduces the risk of particles outside the channel clogging the seepage holes, thus achieving bidirectional anti-clogging. This reduces the cleaning cycle of the seepage holes and improves the convenience of using the canal.

[0012] Preferably, the sealing strip has a T-shaped cross-section; the sealing strip includes a fixing part and an impact-resistant part; the fixing part and the impact-resistant part are arranged perpendicular to each other; the fixing part abuts against the adjacent channel body; the impact-resistant part fits against the inner wall of the channel body; and an impact-resistant metal sheet is arranged along the length direction inside the impact-resistant part.

[0013] The sealing strip is made of rubber, which not only provides a good seal but also allows the channel to adapt to thermal expansion and contraction caused by changes in ambient temperature. It also accommodates changes in the gap between adjacent channels by compressing the fixing part. Furthermore, by setting an impact-resistant part inside the fixing part and an impact-resistant metal sheet inside the impact-resistant part, it can effectively achieve sealing and water flow scouring even in U-shaped structures and rapid water flow with guide channels. This improves the sealing performance of the water channel and avoids waste caused by water leakage.

[0014] Preferably, the sand-cleaning device has a symmetrical structure, and the symmetrical sand-cleaning device is symmetrically arranged on both sides of the sedimentation tank; the sand-cleaning device includes a filter screen, a tension rope, a first grooved wheel, a second grooved wheel, a support plate, a winding roller, and a winding motor; the filter screen is a metal woven mesh; the filter screen has evenly spaced blocking parts perpendicular to the filter screen along its length; the blocking parts are strip-shaped sheet structures woven from metal wires; the blocking parts are perpendicular to the filter screen; the two sides of the filter screen are respectively fixedly connected to a tension rope; the two sides of the filter screen... The ends are respectively connected to the symmetrically arranged take-up rollers; the filter screen symmetrically passes over the top of the first grooved wheel; the first grooved wheel is rotatably connected to the two side ears of the channel body through the support plate; the filter screen symmetrically passes over the bottom of the second grooved wheel; the second grooved wheel is located at the bottom of the sedimentation tank; the tension rope passes over the grooves of the first and second grooved wheels; the take-up roller is rotatably connected to the side wall of the sedimentation tank through the mounting frame; the end of the take-up roller is connected to the drive shaft of the take-up motor; the take-up motor is fixedly connected to the support plate.

[0015] Two symmetrically arranged winding motors are electrically connected to the controller. The power for the winding motors is provided by solar panels and batteries. During operation, the controller controls the winding motor on one side of the sedimentation tank to wind up, while simultaneously controlling the winding motor on the other side to unwind. This ensures that the filter screen and tension rope are always taut as they are wound towards one side of the sedimentation tank. During this process, the blocking part on the filter screen blocks the silt deposited on the filter screen at the bottom of the sedimentation tank, preventing the silt adhering to the filter screen from falling off during the upward movement. This achieves more efficient removal of silt from the sedimentation tank. As the filter screen continues to wind up, when the silt on the filter screen moves below the winding roller, the silt adhering to the filter screen falls off under its own gravity, thus achieving… The system automatically removes silt from the sedimentation tank. Once all the silt deposited in the sedimentation tank has fallen from below the winding roller on one side, the controller stops both winding motors simultaneously, initiating the next sedimentation cycle. After a certain amount of silt has settled in the sedimentation tank, the controller reverses the rotation of the two winding motors, conveying the silt to the winding roller on the other side. After cleaning, the controller stops both winding motors simultaneously, restarting the sedimentation cycle. The waiting time for the sedimentation cycle is adjusted according to the silt content of the water in the canal, ensuring that the silt removal device can promptly remove silt from the sedimentation tank while also preventing overwork that could reduce its service life.

[0016] Preferably, a rubber sleeve is fitted onto the rotating shaft of the first grooved wheel; the rubber sleeve is inserted into the mounting hole of the support plate; the rotating shaft of the first grooved wheel is connected to the vibration element of the vibrator; and the vibrator is fixedly connected to the support plate.

[0017] The vibrator is connected to the controller via an electrical signal. When the controller controls the winding motor of the sand-cleaning device to rewind, the controller simultaneously controls the vibrator to start working. The vibrator then drives the first grooved wheel to perform high-frequency, low-amplitude vibration. In turn, the first grooved wheel drives the tension rope and filter screen that are wrapped around it to also perform high-frequency, low-amplitude vibration. On the one hand, this allows the water carried in the sand on the filter screen to be shaken off in time, thereby accelerating the solid-liquid separation process, reducing water loss, and making it easier for the dehydrated sand to fall off the filter screen. On the other hand, the high-frequency, low-amplitude vibration also prevents the sand from adhering to the filter screen, further improving the efficiency of sand falling off the filter screen, and thus improving the sand-cleaning effect of the sand-cleaning device.

[0018] Preferably, an intercepting net is provided on the filter screen along the length of the filter screen; the intercepting net is located on the filter screen at the downstream end near the water flow; the intercepting net is perpendicular to the filter screen; and the intercepting net is fixedly connected to the filter screen.

[0019] By setting an intercepting net at one end of the filter screen, the water flowing from the upstream channel gains centrifugal force under the action of the guide channel. The sediment carried by the centrifugal force impacts the filter screen of the sedimentation tank, and the intercepting net blocks the sediment continuously deposited on the filter screen. Otherwise, the sediment deposited on the filter screen will be carried away by the water flow again, thereby improving the sedimentation capacity of the sedimentation tank and the sand removal effect of the sand removal device.

[0020] Preferably, a guide frame is provided above the winding roller; the guide frame is positioned corresponding to the interception net; the guide frame is fixedly connected to the sedimentation tank; a guide part is provided at the suspended end of the guide frame; the guide part is a downward-sloping curved surface structure.

[0021] By installing a guide frame above the take-up roller, the upper part of the intercepting net abuts against the guide as it is about to be wound onto the take-up roller along with the filter screen. As the intercepting net is continuously wound up, the guide's pressure causes the net to bend parallel to the filter screen, and then it is wound onto the take-up roller along with the filter screen. When the filter screen is wound in the reverse direction, the intercepting net gradually unfolds as it unwinds from the take-up roller, returning to a perpendicular position to the filter screen under its own elasticity. The guide frame ensures better winding of the intercepting net, thus extending its service life and preventing damage to its shape, thereby guaranteeing its interception effect.

[0022] Preferably, the filter screen has multiple intercepting strips spaced apart along its width; the intercepting strips are attached to the filter screen and extend through the filter screen along its length; the intercepting strips are made of an elastic material.

[0023] By setting interception bars upstream of the interception net, the sediment carried by the water flow impacting the filter net can be diverted and intercepted by multiple interception bars, thereby preventing all the sediment on the filter net from accumulating on the interception net. After accumulating to a certain extent, the excessively high sediment is easily carried away by the water flow again, thus improving the sand removal effect of the sand removal device.

[0024] Preferably, the height of the intercepting strips gradually increases in a gradient; the intercepting strips closer to the intercepting net are taller.

[0025] By setting the height of the intercepting bars to gradually increase in a gradient, the sediment carried in the water flow can be intercepted more evenly by multiple intercepting bars, rather than being blocked by the upstream intercepting bar and affecting the interception effect of the downstream intercepting bars. This improves the interception efficiency of the intercepting bars and thus improves the sand removal effect of the sand removal device.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. This invention employs a U-shaped cross-section channel with spiral guide channels on the inner wall. This not only increases the flow velocity of water flowing through the channel due to the U-shaped cross-section, but also causes the water to rotate spirally while flowing, thus improving the water's ability to carry sediment. Combined with sedimentation tanks spaced 20-25 meters apart, this ensures that no sediment accumulates in the channel, thereby guaranteeing the efficiency of water flow. Furthermore, when diverting water to farmland, this invention reduces the risk of control valve blockage and improves the accuracy of water volume control, thereby maximizing irrigation effectiveness. This project significantly improves the sediment carrying capacity by using a U-shaped cross-section and a spiral guide channel, thereby allowing for longer intervals between sedimentation tanks. This reduces the number of sedimentation tanks and sand-clearing devices required for a given length of canal, saving on canal construction costs. Furthermore, the spiral guide channel guides the water flow in a rotating manner, causing sediment and water to separate. Specifically, the sediment is transported forward towards the inner wall of the canal under centrifugal force. Since the width and depth of the sedimentation tank's inner wall are greater than those of the canal, the sediment carried by the water flowing through the sedimentation tank adheres to the inner wall of the sedimentation tank under centrifugal force, maximizing sediment retention and improving sedimentation efficiency.

[0028] 2. In this invention, the controller controls the winding motor on one side of the sedimentation tank to wind up the filter screen while simultaneously controlling the winding motor on the other side to unwind it. This ensures that the filter screen and tension rope are always taut as they are wound towards one side of the sedimentation tank. During this process, the blocking part on the filter screen blocks the silt deposited on the filter screen at the bottom of the sedimentation tank, preventing the silt adhering to the filter screen from falling off during the upward movement of the filter screen. This achieves more efficient removal of silt from the sedimentation tank. As the filter screen is continuously wound up, when the silt on the filter screen moves below the winding roller, the silt adhering to the filter screen falls off under its own gravity, thus achieving automatic removal of silt from the sedimentation tank. When the sediment in the sedimentation tank... After all the accumulated silt has fallen from below the winding roller on one side, the controller stops both winding motors simultaneously, thus initiating the next sedimentation cycle. Once a certain amount of silt has settled in the sedimentation tank, the controller reverses the rotation of the two winding motors, thereby conveying the silt from the sedimentation tank to the winding roller on the other side. After cleaning, the controller stops both winding motors simultaneously, thus re-entering the sedimentation cycle. The waiting time for the sedimentation cycle is adjusted according to the silt content of the water source in the canal, ensuring that the sand-cleaning device can promptly remove the silt from the sedimentation tank while also preventing the device from overworking and reducing its service life.

[0029] 3. In this invention, when the controller controls the winding motor of the sand-cleaning device to wind up, the controller simultaneously controls the vibrator to start working. The vibrator then drives the first grooved wheel to perform high-frequency, low-amplitude vibration. In turn, the first grooved wheel drives the tension rope and filter screen that are wrapped around it to also perform high-frequency, low-amplitude vibration. On the one hand, this allows the water carried in the sand on the filter screen to be shaken off in time, thereby accelerating the solid-liquid separation process, reducing water loss, and making it easier for the dehydrated sand to fall off the filter screen. On the other hand, the high-frequency, low-amplitude vibration also prevents the sand from adhering to the filter screen, further improving the efficiency of sand falling off the filter screen, and thus improving the sand-cleaning effect of the sand-cleaning device. Attached Figure Description

[0030] The invention will now be further described with reference to the accompanying drawings.

[0031] Figure 1 This is a schematic diagram of the overall structure of the irrigation canal of the present invention;

[0032] Figure 2 This is a top view of the irrigation canal of the present invention;

[0033] Figure 3 This is a schematic diagram of the channel structure in this invention;

[0034] Figure 4 This is a cross-sectional view of the channel body in this invention;

[0035] Figure 5 This is a schematic diagram of the sealing strip in this invention;

[0036] Figure 6 yes Figure 2 Full sectional view at point AA;

[0037] Figure 7 This is a schematic diagram of the sand-removing device in this invention;

[0038] Figure 8 This is a schematic diagram of the internal structure of the sand-removing device in this invention;

[0039] Figure 9 This is a schematic diagram of the connection of the rubber sleeve in this invention;

[0040] Figure 10 This is a schematic diagram of the guide frame structure in this invention;

[0041] Figure 11 This is a schematic diagram of the filter screen in this invention;

[0042] In the diagram: 1. Channel body, 11. Diversion channel, 12. Seepage hole, 13. Nylon filament bundle, 2. Sealing strip, 21. Fixing part, 22. Impact-resistant part, 23. Impact-resistant metal sheet, 3. Sedimentation tank, 4. Sand cleaning device, 41. Filter screen, 411. Blocking part, 412. Interception bar, 42. Tensioning rope, 43. First grooved wheel, 43. Rubber sleeve, 431. Vibrator, 432. Second grooved wheel, 44. Support plate, 45. Winding roller, 46. Winding motor, 47. Interception net, 48. Guide frame, 49. Guide part, 491. Detailed Implementation

[0043] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0044] like Figures 1 to 3 As shown, an agricultural irrigation canal for water conservancy projects includes a canal body 1, a sealing strip 2, a sedimentation tank 3, and a sand-removing device 4. The canal bodies 1 are connected end to end, and adjacent canal bodies 1 are sealed with sealing strips 2. The cross-section of the canal body 1 is U-shaped. A spiral guide channel 11 is provided on the inner wall of the canal body 1. A sedimentation tank 3 is provided at intervals of several canal bodies 1. The depth of the sedimentation tank 3 is greater than the depth of the canal body 1. The two ends of the sedimentation tank 3 are sealed to the end faces of the canal bodies 1 on both sides with structural adhesive. The sand-removing device 4 is provided inside the sedimentation tank 3. The sand-removing device 4 is used to remove sand from the sedimentation tank 3.

[0045] This design employs a U-shaped cross-section channel 1 with a spiral guide channel 11 installed on its inner wall. This not only increases the flow velocity of water flowing through the channel 1 due to the U-shaped cross-section, but also causes the water to rotate in a spiral motion while flowing, guided by the spiral guide channel 11. This enhances the water's ability to carry sediment. Combined with sedimentation tanks 3 spaced 20-25 meters apart, this ensures that no sediment accumulates in the channel 1, thus guaranteeing the efficiency of water flow. Furthermore, when diverting water to farmland, this design reduces the risk of control valve blockage and improves the accuracy of water volume control, thereby maximizing irrigation effectiveness. This design significantly improves the sediment carrying capacity through the U-shaped cross-section and spiral guide channel 11, thereby allowing for a longer interval between sedimentation tanks 3. This reduces the number of sedimentation tanks 3 and sand-clearing devices 4 required for a given length of canal, saving on canal construction costs. Furthermore, the spiral guide channel 11 guides the water flow while simultaneously separating the sediment from the water. Specifically, the sediment is transported forward along the inner wall of the canal body 1 under centrifugal force. Since the width and depth of the inner wall of the sedimentation tank 3 are greater than those of the canal body 1, the sediment carried by the water flowing through the sedimentation tank 3 adheres to the inner wall of the sedimentation tank 3 under centrifugal force, maximizing sediment retention in the sedimentation tank 3 and thus improving sedimentation efficiency.

[0046] like Figures 3 to 4 As shown, the bottom of the guide channel 11 of the channel body 1 is provided with a plurality of seepage holes 12 at intervals; the diameter of the seepage holes 12 is 1.8-2.3mm; the seepage holes 12 are radially distributed along the arc surface of the channel body 1.

[0047] By setting seepage holes 12 to balance the water pressure difference between the inside and outside of the channel body 1, the hydrostatic pressure borne by the channel body 1 is reduced, thereby preventing the channel body 1 from cracking due to long-term water overload and thus improving the service life of the channel body 1. Moreover, when the groundwater freezes and expands in winter, the seepage holes 12 discharge the excess water in the channel body 1, thereby reducing the damage of the frost heave force to the channel body 1 and further improving the service life of the water channel.

[0048] The φ2mm seepage holes, arranged at 20cm intervals, achieve a single-hole drainage capacity of ≥0.8L / min, thus meeting the drainage requirements of channel 1 while avoiding structural instability due to excessive drainage. Excessive hole diameter can lead to a sudden increase in local flow velocity; for example, the flow velocity at the φ5mm hole opening can reach 2.5m / s, accelerating erosion of the hole wall. The φ2mm hole diameter, however, controls the flow velocity at the opening between 0.8-1.2m / s, thus matching the overall flow velocity of the guide channel 11 (1.0-1.67m / s). The clogging data for different hole sizes are shown in the table below.

[0049]

[0050] As can be seen from the table, the φ2mm seepage hole 12 achieves the best balance between anti-clogging performance (intercepting particles >0.5mm) and maintenance cycle (dredging frequency ≤1 time / month).

[0051] like Figure 4 As shown, nylon filament bundles 13 are arranged axially inside the seepage hole 12; the two ends of the nylon filament bundles 13 are respectively anchored to the inner wall of the guide channel 11 and the outer wall of the channel body 1 by a fastener; a coarse sand layer, a gravel layer and a geotextile are respectively arranged from top to bottom below the channel body 1 corresponding to the position of the seepage hole 12.

[0052] First, the 28 bundles of nylon filaments 13 installed inside the seepage hole 12 effectively intercept 0.5mm particles. Then, through a three-stage reverse filtration structure consisting of a coarse sand layer (2cm thick), a gravel layer (3cm thick), and geotextile, the risk of particles outside the channel body 1 back-clogging the seepage hole 12 is further reduced, thus achieving bidirectional anti-clogging, reducing the cleaning cycle of the seepage hole 12, and improving the convenience of using the canal.

[0053] like Figure 5As shown, the sealing strip 2 has a T-shaped cross-section; the sealing strip 2 includes a fixing part 21 and an impact-resistant part 22; the fixing part 21 and the impact-resistant part 22 are arranged perpendicular to each other; the fixing part 21 abuts against the adjacent channel body 1; the impact-resistant part 22 fits against the inner wall of the channel body 1; an impact-resistant metal sheet 23 is arranged along the length direction inside the impact-resistant part 22.

[0054] The sealing strip 2 is made of rubber, which not only achieves a good seal, but also allows the channel body 1 to adapt to thermal expansion and contraction caused by changes in ambient temperature. It can also adapt to the gap changes between two adjacent channel bodies 1 by squeezing the fixing part 21. By setting an impact-resistant part 22 inside the fixing part 21, and an impact-resistant metal sheet 23 inside the impact-resistant part 22, it can achieve a good seal and water flow scouring even in the case of a U-shaped structure and a fast water flow with a guide channel 11, thereby improving the sealing performance of the water channel and avoiding waste caused by water leakage.

[0055] like Figures 6 to 8 As shown, the sand cleaning device 4 has a symmetrical structure, and the symmetrical sand cleaning device 4 is symmetrically arranged on both sides of the sedimentation tank 3; the sand cleaning device 4 includes a filter screen 41, a tension rope 42, a first grooved wheel 43, a second grooved wheel 44, a support plate 45, a winding roller 46, and a winding motor 47; the filter screen 41 is a metal woven mesh; the filter screen 41 has blocking parts 411 evenly spaced along its length and perpendicular to the filter screen 41; the blocking parts 411 are strip-shaped sheet structures woven from metal wire; the blocking parts 411 are perpendicular to the filter screen 41; the two sides of the filter screen 41 are respectively fixedly connected to a tension rope 42; the filter screen 41... The two ends of the filter screen 41 are respectively connected to the symmetrically arranged take-up rollers 46; the filter screen 41 symmetrically passes over the top of the first grooved wheel 43; the first grooved wheel 43 is rotatably connected to the two side ears of the channel body 1 through the support plate 45; the filter screen 41 symmetrically passes over the bottom of the second grooved wheel 44; the second grooved wheel 44 is located at the bottom of the sedimentation tank 3; the tension rope 42 passes over the grooves of the first grooved wheel 43 and the second grooved wheel 44; the take-up roller 46 is rotatably connected to the side wall of the sedimentation tank 3 through the mounting bracket; the end of the take-up roller 46 is connected to the drive shaft of the take-up motor 47; the take-up motor 47 is fixedly connected to the support plate 45.

[0056] Two symmetrically arranged winding motors 47 are both connected to the controller via electrical signals. The power source for the winding motors 47 is provided by solar panels and batteries. During operation, the controller controls the winding motor 47 on one side of the sedimentation tank 3 to wind up, while simultaneously controlling the winding motor 47 on the other side to unwind. This ensures that the filter screen 41 and tension rope 42 are always taut as they are wound towards one side of the sedimentation tank 3. During this process, the blocking part 411 on the filter screen 41 blocks the sediment deposited on the filter screen 41 at the bottom of the sedimentation tank, thus preventing the sediment attached to the filter screen 41 from falling off during the upward movement of the filter screen 41. This achieves more efficient removal of sediment in the sedimentation tank 3. As the filter screen 41 is continuously wound up, when the sediment on the filter screen 41 moves to below the winding roller 46, the sediment attached to the filter screen 41 is subjected to its own gravity. The system uses a detachment mechanism to automatically remove silt from the sedimentation tank 3. Once all the silt deposited in the sedimentation tank 3 has fallen from the bottom of the winding mechanism on one side, the controller controls both winding motors 47 to stop rotating simultaneously, thus entering the next sedimentation cycle. After a certain amount of silt has settled in the sedimentation tank 3, the controller controls both winding motors 47 to rotate in the opposite direction, thereby conveying the silt in the sedimentation tank 3 to the winding roller 46 on the other side. After cleaning, the controller controls both winding motors 47 to stop rotating simultaneously, thus re-entering the sedimentation cycle. The waiting time of the sedimentation cycle is adjusted according to the silt content of the water source in the canal, thereby ensuring that the silt removal device 4 can ensure that the silt in the sedimentation tank 3 can be removed in a timely manner, while also ensuring that the silt removal device 4 does not overwork and reduce its service life.

[0057] like Figure 9 As shown, a rubber sleeve 431 is fitted on the rotating shaft of the first grooved wheel 43; the rubber sleeve 431 is inserted into the mounting hole of the support plate 45; the rotating shaft of the first grooved wheel 43 is connected to the vibration element of the vibrator 432; the vibrator 432 is fixedly connected to the support plate 45.

[0058] The vibrator 432 is connected to the controller via an electrical signal. When the controller controls the winding motor 47 of the sand cleaning device 4 to wind up, the controller simultaneously controls the vibrator 432 to start working. The vibrator 432 then drives the first grooved wheel 43 to perform high-frequency, low-amplitude vibration. The first grooved wheel 43 then drives the tension rope 42 and the filter screen 41 wrapped around it to also perform high-frequency, low-amplitude vibration. On the one hand, this allows the water carried in the sand on the filter screen 41 to be shaken off in time, thereby accelerating the solid-liquid separation process, reducing water loss, and making it easier for the dehydrated sand to fall off the filter screen 41. On the other hand, the high-frequency, low-amplitude vibration also prevents the sand from adhering to the filter screen 41, further improving the efficiency of sand falling off the filter screen 41, and thus improving the sand cleaning effect of the sand cleaning device 4.

[0059] like Figure 11 As shown, an intercepting net 48 is provided on the filter screen 41 along the length direction of the filter screen 41; the intercepting net 48 is located on the filter screen 41 near the downstream end of the water flow; the intercepting net 48 is perpendicular to the filter screen 41; the intercepting net 48 is fixedly connected to the filter screen 41.

[0060] By setting an intercepting net 48 at one end of the filter screen 41, the water flowing from the upstream channel 1 gains centrifugal force under the action of the guide channel 11. The sediment carried by the centrifugal force impacts the filter screen 41 of the sedimentation tank 3. The intercepting net 48 then blocks the sediment continuously deposited on the filter screen 41. Otherwise, the sediment deposited on the filter screen 41 will be carried away by the water flow again, thereby improving the sedimentation capacity of the sedimentation tank 3 and the sand cleaning effect of the sand cleaning device 4.

[0061] like Figure 8 and Figure 10 As shown, a guide frame 49 is provided above the winding roller 46; the guide frame 49 is positioned corresponding to the interception net 48; the guide frame 49 is fixedly connected to the sedimentation tank 3; a guide part 491 is provided at the suspended end of the guide frame 49; the guide part 491 is a downward inclined curved surface structure.

[0062] By providing a guide frame 49 above the take-up roller 46, when the intercepting net 48 is about to be wound onto the take-up roller 46 along with the filter net 41, the upper end of the intercepting net 48 abuts against the guide portion 491. As the intercepting net 48 is continuously wound up, the guide portion 491 compresses it, causing the intercepting net 48 to bend parallel to the filter net 41, and then it is wound onto the take-up roller 46 along with the filter net 41. When the filter net 41 is wound up in the opposite direction, as the filter net 41 unfolds from the take-up roller 46, the intercepting net 48 gradually unfolds as well, and returns to a state perpendicular to the filter net 41 under its own elasticity. By providing the guide frame 49, the intercepting net 48 is wound up more effectively, thereby improving the service life of the intercepting net 48 and ensuring that the shape of the intercepting net 48 is not damaged, thus ensuring the interception effect of the intercepting net 48.

[0063] like Figure 11 As shown, a plurality of intercepting strips 412 are spaced apart along the width direction on the filter screen 41; the intercepting strips 412 are attached to the filter screen 41 and are arranged through the filter screen 41 along the length direction; the intercepting strips 412 are made of elastic material.

[0064] By setting intercepting bars 412 upstream of the intercepting net 48, the mud and sand carried by the water flow impacting the filter net 41 can be diverted and intercepted by multiple intercepting bars 412, thereby preventing all the mud and sand on the filter net 41 from accumulating on the intercepting net 48. After accumulating to a certain extent, the mud and sand that accumulates too high is easily carried away by the water flow again, thereby improving the sand removal effect of the sand removal device 4.

[0065] The height of the interception strip 412 gradually increases in a gradient; the closer the interception strip 412 is to the interception net 48, the greater its height.

[0066] By setting the height of the interception bars 412 to gradually increase in a gradient, the sediment carried in the water flow can be intercepted more evenly by multiple interception bars 412, rather than being blocked by the upstream interception bar 412 and affecting the interception effect of the downstream interception bars 412. This improves the interception efficiency of the interception bars 412 and thus improves the sand removal effect of the sand removal device 4.

[0067] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. An agricultural irrigation canal for use in water conservancy projects, characterized in that: The system includes a channel body (1), a sealing strip (2), a sedimentation tank (3), and a sand removal device (4); the channel bodies (1) are connected end to end, and adjacent channel bodies (1) are sealed with sealing strips (2); the cross-section of the channel body (1) is U-shaped; a spiral guide channel (11) is provided on the inner wall of the channel body (1); a sedimentation tank (3) is provided every few channel bodies (1); the depth of the sedimentation tank (3) is greater than the depth of the channel body (1); the two ends of the sedimentation tank (3) are sealed with the end faces of the channel bodies (1) on both sides by structural adhesive; the sand removal device (4) is provided in the sedimentation tank (3); the sand removal device (4) is used to remove the sand from the sedimentation tank (3).

2. An agricultural irrigation canal for water conservancy projects according to claim 1, characterized in that: The bottom of the guide channel (11) of the channel body (1) is provided with a plurality of seepage holes (12) at intervals; the diameter of the seepage holes (12) is 1.8-2.3mm; the seepage holes (12) are radially distributed along the arc surface of the channel body (1).

3. An agricultural irrigation canal for water conservancy projects according to claim 2, characterized in that: Nylon filament bundles (13) are arranged axially inside the seepage hole (12); the two ends of the nylon filament bundles (13) are respectively anchored to the inner wall of the guide channel (11) and the outer wall of the channel body (1) by a fastener; a coarse sand layer, a gravel layer and a geotextile are respectively arranged from top to bottom below the channel body (1) corresponding to the position of the seepage hole (12).

4. An agricultural irrigation canal for water conservancy projects according to claim 1, characterized in that: The sealing strip (2) has a T-shaped cross-section; the sealing strip (2) includes a fixing part (21) and an impact-resistant part (22); the fixing part (21) and the impact-resistant part (22) are arranged perpendicular to each other; the fixing part (21) abuts against the adjacent channel body (1); the impact-resistant part (22) fits against the inner wall of the channel body (1); an impact-resistant metal sheet (23) is arranged along the length direction inside the impact-resistant part (22).

5. An agricultural irrigation canal for water conservancy projects according to claim 1, characterized in that: The sand cleaning device (4) has a symmetrical structure, and the sand cleaning device (4) is symmetrically arranged on both sides of the sedimentation tank (3); the sand cleaning device (4) includes a filter screen (41), a tension rope (42), a first grooved wheel (43), a second grooved wheel (44), a support plate (45), a winding roller (46), and a winding motor (47); the filter screen (41) is a metal woven mesh; the filter screen (41) has evenly spaced blocking parts (411) along its length direction and perpendicular to the filter screen (41); the blocking parts (411) are strip-shaped sheet structures woven from metal wires; the blocking parts (411) are perpendicular to the filter screen (41); the two sides of the filter screen (41) are respectively fixedly connected to a tension rope (42); the filter screen (411) The two ends of the filter screen (41) are respectively connected to the symmetrically arranged take-up roller (46); the filter screen (41) symmetrically passes over the top of the first grooved wheel (43); the first grooved wheel (43) is rotatably connected to the two side ears of the channel body (1) through the support plate (45); the filter screen (41) symmetrically passes over the bottom of the second grooved wheel (44); the second grooved wheel (44) is set at the bottom of the sedimentation tank (3); the tension rope (42) passes over the grooves of the first grooved wheel (43) and the second grooved wheel (44); the take-up roller (46) is rotatably connected to the side wall of the sedimentation tank (3) through the mounting frame; the end of the take-up roller (46) is connected to the drive shaft of the take-up motor (47); the take-up motor (47) is fixedly connected to the support plate (45).

6. An agricultural irrigation canal for water conservancy projects according to claim 5, characterized in that: A rubber sleeve (431) is fitted on the rotating shaft of the first grooved wheel (43); the rubber sleeve (431) is inserted into the mounting hole of the support plate (45); the rotating shaft of the first grooved wheel (43) is connected to the vibration element of the vibrator (432); the vibrator (432) is fixedly connected to the support plate (45).

7. An agricultural irrigation canal for water conservancy projects according to claim 5, characterized in that: An intercepting net (48) is provided on the filter screen (41) along the length direction of the filter screen (41); the intercepting net (48) is provided on the filter screen (41) near the downstream end of the water flow; the intercepting net (48) is perpendicular to the filter screen (41); the intercepting net (48) is fixedly connected to the filter screen (41).

8. An agricultural irrigation canal for water conservancy projects according to claim 7, characterized in that: A guide frame (49) is provided above the winding roller (46); the guide frame (49) is positioned corresponding to the interception net (48); the guide frame (49) is fixedly connected to the sedimentation tank (3); a guide part (491) is provided at the suspended end of the guide frame (49); the guide part (491) is a downward inclined curved surface structure.

9. An agricultural irrigation canal for water conservancy projects according to claim 8, characterized in that: The filter screen (41) has multiple intercepting strips (412) spaced apart along its width direction; the intercepting strips (412) are attached to the filter screen (41) and extend through the filter screen (41) along its length direction; the intercepting strips (412) are made of elastic material.

10. An agricultural irrigation canal for water conservancy projects according to claim 9, characterized in that: The height of the intercepting strip (412) gradually increases in a gradient; the closer the intercepting strip (412) is to the intercepting net (48), the greater its height.

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