Sand blocking curtain hydrodynamic optimization system based on active flow guide and method thereof

Abstract

The invention provides a sand-blocking curtain hydrodynamic optimization system and method based on active flow guiding, and relates to the field of sand-blocking curtains, the sand-blocking curtain hydrodynamic optimization system based on active flow guiding comprises an inflation device, a negative pressure device, a flexible curtain, a plurality of connecting buoys and fasteners, the connecting buoys are connected through traction pipes, the top end of the flexible curtain is connected to the traction pipe, the bottom end of the flexible curtain is connected to the multiple fasteners, the multiple connecting buoys are fixedly sleeved with air bags, the left sides and the right sides of the air bags fixedly communicate with exhaust parts, a partition plate is fixed into the traction pipe, and an inflation pipe and a negative pressure pipe fixedly penetrate through the communicating buoys in a penetrating mode. According to the invention, the buoyancy of the buoy can be adjusted in real time through the inflation and deflation of the air bag, so that the angle of the flexible curtain can be dynamically adjusted to adapt to different dust intensities, wind power conditions and river water flow changes, the operation is simple and convenient, and the response is rapid.

Description

Technical Field

[0001] This invention relates to the field of sand-blocking curtains, and more particularly to a hydrodynamic optimization system and method for sand-blocking curtains based on active flow guidance. Background Technology

[0002] Sand barriers are mechanical windbreak and sand-fixing engineering devices widely used in arid and windy areas. They are typically made of weather-resistant synthetic materials such as high-density polyethylene or polypropylene, woven into a mesh or cloth structure. Their core function is to intercept, deposit, and fix shifting sand by altering the movement structure of near-surface windblown sand, thereby reducing wind speed. Sand barriers are usually arranged in rows at regular intervals upwind of the protected area, forming an artificial windbreak. When windblown sand passes over the barrier, its porous structure effectively divides and dissipates wind energy, creating turbulent deceleration zones in front of and behind the barrier. The sand particles carried by the barrier settle before and after the barrier due to insufficient kinetic energy. Over time, a natural sand embankment gradually accumulates in front of the barrier, forming a more stable composite protection system together with the sand barriers. This device has advantages such as rapid deployment, flexibility, minimal ecological disturbance, and factory production capabilities. It is particularly suitable for emergency protection in the early stages of ecologically fragile projects, or as an auxiliary measure combined with vegetation for sand fixation, creating valuable calm wind and stable soil conditions for subsequent vegetation restoration. Its protective effectiveness mainly depends on parameters such as the porosity of the curtain, its installation height, and the angle with the prevailing wind direction. Scientific deployment can make its effective protection distance reach 15 to 20 times its height, making it one of the indispensable practical technologies in current wind and sand control projects.

[0003] Existing sand-blocking curtains consist of floats, a curtain, and a dropper. The floats move the curtain in the water to block sand. However, existing flexible sand-blocking curtains cannot adjust their posture according to sand conditions and river flow, resulting in unstable sand-blocking effects. When faced with the immense force of large waves, the curtain can only rely on its own strength and anchoring force, making it extremely prone to deformation or damage due to excessive wind. Furthermore, as sediment accumulates, the weight of the curtain increases, which not only reduces sand-blocking efficiency but also accelerates the aging of the curtain material.

[0004] Therefore, it is necessary to provide a new hydrodynamic optimization system and method for sand-blocking curtains based on active flow guidance to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a hydrodynamic optimization system and method for a sand-blocking curtain based on active flow guidance.

[0006] The hydrodynamic optimization system for a sand-blocking curtain based on active flow guidance provided by this invention includes an inflation device, a negative pressure device, a flexible curtain, multiple connecting floats, and fasteners for pulling down the connecting floats. The multiple connecting floats are connected by a traction pipe. The top end of the flexible curtain is connected to the traction pipe, and the bottom end of the flexible curtain is connected to multiple fasteners. Each of the multiple connecting floats is fixedly fitted with an airbag. Both sides of the airbag are fixedly connected to exhaust components. The output ends of the two exhaust components are mirror images of the traction pipe, and both exhaust components have a downward inclined structure. A partition plate is fixedly installed inside the traction pipe, which divides the inner cavity of the traction pipe into a relatively independent inflation chamber and a negative pressure chamber. An inflation pipe and a negative pressure pipe are fixedly inserted into the connecting floats. The two ends of the inflation pipe are connected to the inflation chamber and the airbag, and the two ends of the negative pressure pipe are connected to the negative pressure chamber and the airbag. The inflation device is connected to the inflation chamber, and the negative pressure device is connected to the negative pressure chamber.

[0007] Preferably, it also includes an aeration pipe, which is fixed to the bottom of the flexible curtain, and the inflation device is optionally connected to the inflation chamber or the aeration pipe. Preferably, the exhaust component includes an exhaust pipe, a one-way valve, and a nozzle. The exhaust pipe is fixedly connected to the airbag, the one-way valve is installed on the exhaust pipe, and the end of the exhaust pipe away from the airbag is fixedly connected to the nozzle.

[0008] Preferably, it also includes an auxiliary support structure for providing auxiliary traction force to the multiple connecting pontoons.

[0009] Preferably, the auxiliary support structure includes multiple connecting anchor chains and multiple underwater pile foundations. The multiple connecting anchor chains are distributed along the extension direction of the flexible curtain, and all of the multiple connecting anchor chains are fixed on the flexible curtain. The top ends of the multiple connecting anchor chains are fixed on the traction pipe, and the bottom ends of the multiple connecting anchor chains are respectively fixedly connected to the multiple underwater pile foundations.

[0010] Preferably, the auxiliary support structure includes multiple connecting anchor chains II and multiple underwater pile foundations II, the top ends of the multiple connecting anchor chains II are fixed to the traction pipe, and the bottom ends of the multiple connecting anchor chains II are respectively fixedly connected to the multiple underwater pile foundations II.

[0011] Preferably, the auxiliary support device includes a traction buoy belt, multiple connecting anchor chains, multiple underwater pile foundations, and multiple connecting strips. One end of each of the multiple connecting strips is fixed to the traction pipe, and the other end of each of the multiple connecting strips is fixed to the traction buoy belt. One end of each of the multiple connecting anchor chains is fixed to the traction buoy belt, and the other end of each of the multiple connecting anchor chains is fixedly connected to the multiple underwater pile foundations.

[0012] Preferably, it also includes a flexible screen adjustment system, the flexible screen adjustment system comprising: Acquisition unit: used to acquire water flow velocity, water flow direction, and to obtain the posture and tension of the flexible curtain; Control unit: Used to compare the posture and tension of the flexible curtain with a preset threshold and output the comparison result; Execution unit: Used to connect to the control unit. Based on the comparison results, when the posture and tension of the flexible screen are outside the preset threshold, the buoyancy of the airbag is adjusted by the opening and closing of the inflation device and the negative pressure device to change the posture of the flexible screen. When the posture and tension of the flexible screen are within the preset threshold, no related operation is performed.

[0013] Preferably, under constant flow conditions, the tension generated on the flexible curtain is calculated using hydrostatic pressure. Specifically, the formula for calculating the curtain tension under hydrostatic pressure is as follows: ; In the formula; For the tension of the flexible screen; Indicates the density of water; Represents gravitational acceleration; This indicates the water level difference between the two sides of the flexible screen. This refers to the water depth on the side with the higher water level.

[0014] Preferably, the fastener is a Hall anchor or a counterweight.

[0015] Preferably, when the fastener is a counterweight, under constant flow conditions, the counterweight is subjected to the combined force of the tension of the flexible curtain, the friction between the counterweight and the seabed, its own weight, and buoyancy. Based on the force balance in the horizontal and vertical directions, we have: One type; Two styles; In addition, the tension T inside the curtain C The length of the flexible curtain is constant everywhere. Three styles; From the above formulas one, two, and three, we can see that; ; Where: G S The force is represented by the resultant force of the counterweight's own weight and buoyancy; u represents the coefficient of friction between the counterweight and the bottom of the water. It is represented by the angle between the bottom of the flexible screen and the vertical direction.

[0016] Preferably, the nozzle has a tapered, trumpet-shaped structure along the direction away from the exhaust pipe.

[0017] Preferably, a counterweight chain is fixed to the bottom end of the flexible screen.

[0018] A novel method for optimizing the hydrodynamics of a sand-blocking curtain based on active flow guidance, based on the aforementioned active flow guidance-based sand-blocking curtain hydrodynamic optimization system, includes the following steps: Step 1: Deploy at least one of the aforementioned sand-blocking curtain hydrodynamic optimization systems in the outer waters of the area requiring silt prevention and reduction; Step 2: The bottom of the flexible curtain is pulled by fasteners, and the top of the flexible curtain is pulled by traction pipes. The traction pipes provide an upward pulling force to the flexible curtain under the action of multiple connecting floats, so that the flexible curtain is unfolded in the water. Step 3: When it is necessary to adjust the tilt angle of the flexible screen, close the exhaust device and inflate or de-inflate the airbag through the inflation device or negative pressure device to change the buoyancy of the airbag, so that the connecting float rises or falls in the water, thereby changing the tilt angle of the flexible screen. Step 4: When it is necessary to clean the flexible screen, open the exhaust valve on the left side of the airbag and close the exhaust valve on the right side. Inflate the airbag through the inflation device, so that the gas is ejected from the exhaust valve on the left side after passing through the airbag. The ejected gas generates a reverse force, causing the airbag to move to the right. Similarly, open the exhaust valve on the right side and close the exhaust valve on the left side, so that the gas is ejected from the exhaust valve on the right side after passing through the airbag. The ejected gas generates a reverse force, causing the airbag to move to the left side. Through the left and right movement of the airbag, the flexible screen sways left and right, achieving the purpose of cleaning.

[0019] Compared with related technologies, the hydrodynamic optimization system and method for sand-blocking curtains based on active flow guidance provided by this invention have the following beneficial effects: 1. The buoyancy of the floats can be adjusted in real time by inflating and deflating the airbags, thereby dynamically adjusting the angle of the flexible curtain to adapt to different sandstorm intensities, wind conditions, and river flow changes. No mechanical transmission system is required, making operation simple and responsive. It can effectively cope with the ever-changing sand-blocking environment. The airbag system has high tensile strength and can effectively withstand the self-weight of the flexible curtain, hydrodynamic loads, and sandstorm impacts, forming multi-level safety protection. In extreme sea conditions such as storms and giant waves, the flexible curtain can be actively controlled to maintain a low-resistance posture, significantly reducing water flow impact loads and preventing structural destruction. Compared with traditional rigid structures, this flexible connection method can better adapt to terrain changes and external impacts, reduce the risk of structural damage, and extend service life.

[0020] 2. When using this application, if it is necessary to clean the flexible screen, open the exhaust port on the left side of the airbag and close the exhaust port on the right side. Inflate the airbag through the inflation device, so that the gas is ejected from the exhaust port on the left side after passing through the airbag. The ejected gas generates a reverse force, causing the airbag to move to the right. Similarly, open the exhaust port on the right side and close the exhaust port on the left side, so that the gas is ejected from the exhaust port on the right side after passing through the airbag. The ejected gas generates a reverse force, causing the airbag to move to the left side. Through the left and right movement of the airbag, the flexible screen sways left and right, achieving the purpose of cleaning.

[0021] 3. In this application, the output ends of the two exhaust components are mirror images of the traction pipe. When both exhaust components are in the open state, the inflation device inflates the airbag, increasing the air pressure in the airbag. This causes the gas inside the airbag to diffuse towards the exhaust components on both sides simultaneously. The reaction forces of the gas ejected from the two exhaust components are equal in magnitude and opposite in direction in the horizontal direction. Therefore, the horizontal component forces of the two exhaust components cancel each other out, while the vertical component forces of the two exhaust components are superimposed. This superimposed force is upward, which facilitates the speed of adjusting the posture of the flexible screen. In addition, when retracting the flexible screen, the two upward superimposed forces can make the flexible screen tend to be in a stretched state, improving the convenience of retraction. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of a first embodiment of the sand-blocking curtain hydrodynamic optimization system based on active flow guidance provided by the present invention; Figure 2 for Figure 1 The diagram shows the traction pipe, connecting buoy, and a cross-sectional view of the connecting buoy. Figure 3 A schematic diagram of the structure of Embodiment 2 of the sand-blocking curtain hydrodynamic optimization system based on active flow guidance provided by the present invention; Figure 4 A schematic diagram of the structure of Embodiment 3 of the sand-blocking curtain hydrodynamic optimization system based on active flow guidance provided by the present invention; Figure 5 A schematic diagram of the structure of Embodiment 4 of the active flow-guided sand-blocking curtain hydrodynamic optimization system provided by the present invention; Figure 6 A schematic diagram of the structure of Embodiment 5 of the sand-blocking curtain hydrodynamic optimization system based on active flow guidance provided by the present invention; Figure 7 The diagram shows the variation of the vertical deflection angle of the flexible screen provided by this invention with the water level difference.

[0023] The diagram is labeled as follows: 1. Flexible curtain; 2. Connecting float; 3. Traction pipe; 4. Airbag; 5. Inflation chamber; 6. Negative pressure chamber; 7. Inflation pipe; 8. Negative pressure pipe; 9. Aeration pipe; 10. Connecting anchor chain one; 11. Underwater pile foundation one; 12. Connecting anchor chain two; 13. Underwater pile foundation two; 14. Traction float belt; 15. Connecting anchor chain three; 16. Underwater pile foundation three; 17. Connecting strip; 18. Exhaust pipe; 19. One-way valve; 20. Nozzle; 21. Air compressor; 22. Inflation guide pipe; 23. Inflation valve; 24. Vacuum pump; 25. Extraction guide pipe; 26. Extraction valve; 27. Auxiliary pipe; 28. Auxiliary valve; 29. ​​Fastener. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please refer to the following: Figures 1-7 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of the sand-blocking curtain hydrodynamic optimization system based on active flow guidance provided by the present invention; Figure 2 for Figure 1 The diagram shows the traction pipe, connecting buoy, and a cross-sectional view of the connecting buoy. Figure 3 A schematic diagram of the structure of Embodiment 2 of the sand-blocking curtain hydrodynamic optimization system based on active flow guidance provided by the present invention; Figure 4 A schematic diagram of the structure of Embodiment 3 of the sand-blocking curtain hydrodynamic optimization system based on active flow guidance provided by the present invention; Figure 5 A schematic diagram of the structure of Embodiment 4 of the active flow-guided sand-blocking curtain hydrodynamic optimization system provided by the present invention; Figure 6 A schematic diagram of the structure of Embodiment 5 of the sand-blocking curtain hydrodynamic optimization system based on active flow guidance provided by the present invention; Figure 7 The diagram shows the variation of the vertical deflection angle of the flexible screen provided by this invention with the water level difference.

[0026] In the specific implementation process, such as Figures 1-2 As shown; Example 1 The active flow-guided sand-blocking curtain hydrodynamic optimization system includes an inflation device, a negative pressure device, a flexible curtain 1, multiple connecting floats 2, and fasteners 29 for pulling down the connecting floats 2. The multiple connecting floats 2 are connected by a traction pipe 3. The top end of the flexible curtain 1 is connected to the traction pipe 3, and the bottom end of the flexible curtain 1 is connected to the multiple fasteners 29. Each of the multiple connecting floats 2 is fixedly fitted with an airbag 4. The left and right sides of each airbag 4 are fixedly connected to exhaust devices, and the output ends of the two exhaust devices are about... The traction pipe 3 is arranged in a mirror image, and the output ends of the two exhaust components are inclined downwards. A partition plate is fixed inside the traction pipe 3, which divides the inner cavity of the traction pipe 3 into a relatively independent inflation chamber 5 and a negative pressure chamber 6. An inflation pipe 7 and a negative pressure pipe 8 are fixedly inserted on the connecting float. The two ends of the inflation pipe 7 are connected to the inflation chamber 5 and the airbag 4, and the two ends of the negative pressure pipe 8 are connected to the negative pressure chamber 6 and the airbag 4. The inflation device is connected to the inflation chamber 5, and the negative pressure device is connected to the negative pressure chamber 6. The exhaust component includes an exhaust pipe 18, a one-way valve 19, and a nozzle 20. The exhaust pipe 18 is fixedly connected to the airbag 4, the one-way valve 19 is installed on the exhaust pipe 18, and the end of the exhaust pipe 18 away from the airbag 4 is fixedly connected to the nozzle 20. The one-way valve 19 allows gas to easily open the valve from the inside out and be discharged; when external water attempts to flow in, the valve closes tightly under water pressure to prevent backflow.

[0027] The inflation device includes an air compressor 21, an inflation guide pipe 22, and an inflation valve 23. The air compressor 21 is placed in a waterway, on the shore, or other location. The end of the air compressor 21 is fixedly connected to the inflation guide pipe 22. The inflation guide pipe 22 is connected to the inflation chamber 5. The inflation valve 23 is installed on the inflation guide pipe 22. The negative pressure device includes a vacuum pump 24, an air extraction guide pipe 25, and an air extraction valve 26. The vacuum pump 24 is placed in a waterway, on the shore, or other location. The end of the vacuum pump 24 is fixedly connected to the air extraction guide pipe 25. The air extraction guide pipe 25 is connected to the negative pressure chamber 6. The air extraction valve 26 is installed on the air extraction guide pipe 25. Example 2 like Figure 3 As shown, this embodiment adds an aeration pipe 9 to the first embodiment. Specifically, the aeration pipe 9 is fixed to the bottom of the flexible curtain 1, and the inflation device is connected to either the inflation chamber 5 or the aeration pipe 9. The inflation device also includes an auxiliary pipe 27 and an auxiliary valve 28. The two ends of the auxiliary pipe 27 are respectively connected to the inflation guide pipe 22 and the aeration pipe 9. The auxiliary pipe 27 is located between the inflation valve 23 and the air compressor 21. The auxiliary valve 28 is installed on the auxiliary pipe 27. The air-filling device is connected to the aeration pipe 9. After passing through the aeration pipe 9, the gas is discharged from the micropores of the aeration pipe 9 to form tiny bubbles. The bubbles form an upward flow, which stirs up the mud and sand at the bottom of the flexible curtain 1 and prevents it from hardening. When in use, first use the aeration pipe 9 to liquefy the mud and sand at the root and loosen the bottom of the hardened layer. Then use the inflation device to inflate the airbag 4, so that the exhaust components on both sides work alternately, which can make the flexible curtain 1 swing to a certain extent. Use inertial force and water flow shear force to peel the loosened sediment from the surface of the curtain. It should be noted that the microporous filter head of the aeration pipe 9 is made of "hydrophobic porous material" (such as hydrophobically treated sintered metal or ceramic), and the microscopic properties of this material are hydrophobic and air-loving. Working principle: The contact angle between water and the material is very large, and the surface tension of water prevents it from penetrating through the micropores. Gas, however, can pass through easily. Even if there is negative pressure inside the tube, water will be "blocked" outside the pores.

[0028] Example 3 like Figure 4 As shown, this embodiment adds an auxiliary support structure based on embodiment one. The auxiliary support structure is used to provide auxiliary traction force for multiple connecting buoys 2. In this embodiment, the fastener 29 is a Hall anchor. The auxiliary support structure includes multiple connecting anchor chains 10 and multiple underwater piles 11. The multiple connecting anchor chains 10 are distributed along the extension direction of the flexible curtain 1, and the multiple connecting anchor chains 10 are all fixed on the flexible curtain 1. The top ends of the multiple connecting anchor chains 10 are all fixed on the traction pipe 3, and the bottom ends of the multiple connecting anchor chains 10 are respectively fixedly connected to the multiple underwater piles 11. This embodiment is a structure that combines the Hall anchor with the underwater pile foundation 11 into a single pile-anchor unit. This embodiment has the advantages of bidirectional protection, slightly larger anchoring load, and stable flow field. Example 4 like Figure 5 As shown, this embodiment adds an auxiliary support structure based on embodiment one. In this embodiment, the fastener 29 is a Hall anchor. The auxiliary support structure includes multiple connecting anchor chains 12 and multiple underwater pile foundations 13. The top ends of the multiple connecting anchor chains 12 are fixed to the traction pipe 3, and the bottom ends of the multiple connecting anchor chains 12 are respectively fixedly connected to the multiple underwater pile foundations 13. This embodiment is a structure in which the Hall anchor is separated from the underwater pile foundation 213. This embodiment has the advantages of bidirectional anisotropy, main pile positioning + auxiliary anchor attitude adjustment and flexible layout. Example 5 like Figure 6As shown, this embodiment adds an auxiliary support structure based on embodiment one. In this embodiment, the fastener 29 is a Hall anchor. The auxiliary support device includes a traction buoy belt 14, multiple connecting anchor chains 15, multiple underwater pile foundations 16, and multiple connecting strips 17. One end of each of the multiple connecting strips 17 is fixed to the traction pipe 3, and the other end of each of the multiple connecting strips 17 is fixed to the traction buoy belt 14. One end of each of the multiple connecting anchor chains 15 is fixed to the traction buoy belt 14, and the other end of each of the multiple connecting anchor chains 15 is fixedly connected to the multiple underwater pile foundations 16 respectively. This embodiment describes the structure of a flexible foil mooring system. This embodiment features bidirectional anisotropy, catenary mooring, and the flexibility is advantageous for resisting wave and current loads, as well as being the most convenient to construct. Example 5 This embodiment adds a flexible screen 1 adjustment system to the first embodiment. The flexible screen 1 adjustment system includes: Acquisition unit: used to acquire water flow velocity, water flow direction, and to obtain the posture and tension of the flexible curtain 1; Control unit: used to compare the posture and tension of the flexible curtain 1 with a preset threshold and output the comparison result; Execution unit: Used to connect to the control unit. Based on the comparison results, when the posture and tension of the flexible screen 1 are outside the preset threshold, the buoyancy of the airbag 4 is adjusted by the opening and closing of the inflation device and the negative pressure device to change the posture of the flexible screen 1. When the posture and tension of the flexible screen 1 are within the preset threshold, no related operation is performed. Under constant flow, the tension generated on the flexible curtain 1 is calculated using hydrostatic pressure. Specifically, the formula for calculating the curtain tension under hydrostatic pressure is as follows: ; In the formula; For the tension of the flexible screen; Indicates the density of water; Represents gravitational acceleration; This indicates the water level difference between the two sides of the flexible curtain 1; The water depth on the side with the higher water level; The fastener 29 is a Hall anchor or a counterweight. When the fastener 29 is a counterweight, under constant flow conditions, the counterweight is subjected to the combined force of the tension of the flexible curtain, the friction between the counterweight and the bottom, its own weight, and buoyancy. Based on the force balance in the horizontal and vertical directions, we have: One type; Two styles; In addition, the tension T inside the curtain C The length of the flexible curtain is constant everywhere. ； Three styles; From the above formulas one, two, and three, we can see that; ; Where: G S The force is represented by the resultant force of the counterweight's own weight and buoyancy; u represents the coefficient of friction between the counterweight and the bottom of the water. This is represented by the angle between the bottom of the flexible screen and the vertical direction; The following provides a method for calculating curtain tension under wave action: Assume the curtain is at its equilibrium position A and has maximum momentum over one wave cycle. When it moves to its extreme position A', its momentum decreases to zero, and it is entirely converted into elastic potential energy, stored within the flexible curtain. During this process, the pontoons move due to the stretching of the curtain. L. Use The time taken for this stretching process is represented by the momentum theorem. The direction of motion of the float (connected to the float and airbag) is as follows: ; In the formula: The mass of the float; The angle between the top of the flexible screen and the vertical direction; The maximum horizontal velocity of the float at its equilibrium position can be calculated using linear wave theory. Therefore, the above formula can be written as: ; In the formula, This indicates the tension in the curtain shaft caused by waves. Represents the angular frequency of the wave. Indicates wave amplitude. The wave number is represented by h, and the water depth is represented by h. Furthermore, considering the elastic modulus of the curtain body as E, we can obtain (Equation 4): ; Considering the short extension time of the buoy within the wave cycle, we can assume that the buoy undergoes uniform deceleration during the extension process, which can be summarized by the equation of motion (Equation 5): ; From equations four and five above, we can obtain: ; Therefore, the maximum tensile force on the curtain caused by the waves is: ; Or written as: ; In the formula, H is the wave height, taken as H1% T is the wave period, and the average period is taken.

[0029] To calculate the tension generated by the wave, c can be obtained from... Figure 7 (Graph showing the vertical deflection angle of the flexible curtain as a function of water level difference) The total tension under the combined wave and current action can be obtained by linearly adding the tension under wave action and the tension under water flow action, i.e.: + .

[0030] A novel method for optimizing the hydrodynamics of a sand-blocking curtain based on active flow guidance, based on the aforementioned active flow guidance-based sand-blocking curtain hydrodynamic optimization system, includes the following steps: Step 1: Deploy at least one of the aforementioned sand-blocking curtain hydrodynamic optimization systems in the outer waters of the area requiring silt prevention and reduction; Step 2: The bottom of the flexible curtain 1 is pulled by the fastener 29, and the top of the flexible curtain 1 is pulled by the traction tube 3. The traction tube 3 provides an upward pulling force to the flexible curtain 1 under the action of multiple connecting floats 2, so that the flexible curtain 1 is in an unfolded state in the water. Step 3: When it is necessary to adjust the tilt angle of the flexible screen 1, close the exhaust device and inflate or de-inflate the airbag 4 through the inflation device or negative pressure device to change the buoyancy of the airbag 4, so that the connecting float 2 is in a rising or falling state in the water, thereby changing the tilt angle of the flexible screen 1. Step 4: When it is necessary to clean the flexible screen 1, open the exhaust port on the left side of the airbag 4 and close the exhaust port on the right side. Inflate the airbag 4 through the inflation device, so that the gas is ejected from the exhaust port on the left side after passing through the airbag 4. The ejected gas generates a reverse force, causing the airbag 4 to move to the right. Similarly, open the exhaust port on the right side and close the exhaust port on the left side, so that the gas is ejected from the exhaust port on the right side after passing through the airbag 4. The ejected gas generates a reverse force, causing the airbag 4 to move to the left side. Through the left and right movement of the airbag 4, the flexible screen 1 sways left and right, achieving the purpose of cleaning. Step 5: Connect the air filling device to the aeration pipe 9. After passing through the aeration pipe 9, the gas is discharged from the micropores of the aeration pipe 9 to form tiny bubbles. The bubbles form an upward flow, which stirs up the mud and sand at the bottom of the flexible curtain 1 and prevents it from caking.

[0031] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A hydrodynamic optimization system for a sand-blocking curtain based on active flow guidance, characterized in that, The system includes an inflation device, a negative pressure device, a flexible curtain (1), multiple connecting floats (2), and fasteners (29) for pulling down the connecting floats (2). The multiple connecting floats (2) are connected by a traction pipe (3). The top of the flexible curtain (1) is connected to the traction pipe (3), and the bottom of the flexible curtain (1) is connected to multiple fasteners (29). Each of the multiple connecting floats (2) is fixedly fitted with an airbag (4). The airbag (4) is fixedly connected to exhaust devices on both the left and right sides. The output ends of the two exhaust devices are mirror images of each other about the traction pipe (3). Both exhaust outlets have downward inclined structures. The traction pipe (3) has a partition plate fixed inside. The partition plate divides the inner cavity of the traction pipe (3) into a relatively independent inflation chamber (5) and a negative pressure chamber (6). An inflation pipe (7) and a negative pressure pipe (8) are fixedly inserted on the connecting float. The two ends of the inflation pipe (7) are connected to the inflation chamber (5) and the air bag (4). The two ends of the negative pressure pipe (8) are connected to the negative pressure chamber (6) and the air bag (4). The inflation device is connected to the inflation chamber (5), and the negative pressure device is connected to the negative pressure chamber (6).

2. The hydrodynamic optimization system for sand-blocking curtains based on active flow guidance according to claim 1, characterized in that, It also includes an aeration pipe (9), which is fixed to the bottom of the flexible curtain (1), and the inflation device is connected to either the inflation chamber (5) or the aeration pipe (9).

3. The hydrodynamic optimization system for sand-blocking curtains based on active flow guidance according to claim 1, characterized in that, It also includes an auxiliary support structure for providing auxiliary traction to the multiple connecting pontoons (2).

4. The sand-blocking curtain hydrodynamic optimization system based on active flow guidance according to claim 3, characterized in that, The auxiliary support structure includes multiple connecting anchor chains (10) and multiple underwater pile foundations (11). The multiple connecting anchor chains (10) are distributed along the extension direction of the flexible curtain (1), and the multiple connecting anchor chains (10) are all fixed on the flexible curtain (1). The top of the multiple connecting anchor chains (10) is fixed on the traction pipe (3), and the bottom of the multiple connecting anchor chains (10) is fixedly connected to the multiple underwater pile foundations (11).

5. The active flow guidance-based hydrodynamic optimization system for sand-blocking curtains according to claim 3, characterized in that, The auxiliary support structure includes multiple connecting anchor chains (12) and multiple underwater pile foundations (13). The top ends of the multiple connecting anchor chains (12) are fixed on the traction pipe (3), and the bottom ends of the multiple connecting anchor chains (12) are respectively fixedly connected to the multiple underwater pile foundations (13).

6. The hydrodynamic optimization system for sand-blocking curtains based on active flow guidance according to claim 3, characterized in that, The auxiliary support device includes a traction buoy belt (14), multiple connecting anchor chains (15), multiple underwater pile foundations (16), and multiple connecting strips (17). One end of each of the multiple connecting strips (17) is fixed to the traction pipe (3), and the other end of each of the multiple connecting strips (17) is fixed to the traction buoy belt (14). One end of each of the multiple connecting anchor chains (15) is fixed to the traction buoy belt (14), and the other end of each of the multiple connecting anchor chains (15) is fixedly connected to the multiple underwater pile foundations (16).

7. The sand-blocking curtain hydrodynamic optimization system based on active flow guidance according to claim 1, characterized in that, It also includes a flexible screen (1) adjustment system, the flexible screen (1) adjustment system comprising: Acquisition unit: used to acquire water flow velocity, water flow direction, and to obtain the posture and tension of the flexible curtain (1); Control unit: used to compare the posture and tension of the flexible curtain (1) with a preset threshold and output the comparison result; Execution unit: Used to connect to the control unit. Based on the comparison results, when the posture and tension of the flexible curtain (1) are outside the preset threshold, the buoyancy of the airbag (4) is adjusted by the opening and closing of the inflation device and the negative pressure device to change the posture of the flexible curtain (1). When the posture and tension of the flexible curtain (1) are within the preset threshold, no related operation is performed.

8. The sand-blocking curtain hydrodynamic optimization system based on active flow guidance according to claim 7, characterized in that, Under constant flow, the tension generated on the flexible curtain (1) is calculated using hydrostatic pressure. Specifically, the formula for calculating the curtain tension under hydrostatic pressure is as follows: ； In the formula; For the tension of the flexible screen; Indicates the density of water; Represents gravitational acceleration; This indicates the water level difference between the two sides of the flexible screen. This refers to the water depth on the side with the higher water level.

9. The sand-blocking curtain hydrodynamic optimization system based on active flow guidance according to claim 8, characterized in that, The fastener (29) is a Hall anchor or a counterweight. When the fastener (29) is a counterweight, under constant flow conditions, the counterweight is subjected to the combined force of the tension of the flexible curtain, the friction between the counterweight and the bottom of the water, its own weight, and buoyancy. Based on the force balance in the horizontal and vertical directions, we have: One set; Two styles; In addition, the tension T inside the curtain C The length of the flexible curtain is constant everywhere. Three styles; From the above formulas one, two, and three, we can see that; ； Where: G S The force is represented by the resultant force of the counterweight's own weight and buoyancy; u represents the coefficient of friction between the counterweight and the bottom of the water. It is represented by the angle between the bottom of the flexible screen and the vertical direction.

10. A novel method for optimizing the hydrodynamics of a sand-blocking curtain based on active flow guidance, based on the active flow guidance-based hydrodynamic optimization system for a sand-blocking curtain according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Deploy at least one of the aforementioned sand-blocking curtain hydrodynamic optimization systems in the outer waters of the area requiring silt prevention and reduction; Step 2: The bottom of the flexible curtain (1) is pulled by the fastener (29), and the top of the flexible curtain (1) is pulled by the traction pipe (3). The traction pipe (3) provides an upward pull on the flexible curtain (1) under the action of multiple connecting floats (2), so that the flexible curtain (1) is in an unfolded state in the water. Step 3: When it is necessary to adjust the tilt angle of the flexible curtain (1), close the exhaust device and inflate or de-inflate the airbag (4) through the inflation device or negative pressure device to change the buoyancy of the airbag (4) so ​​that the connecting float (2) is in a rising or falling state in the water, thereby changing the tilt angle of the flexible curtain (1). Step 4: When it is necessary to clean the flexible screen (1), open the exhaust port on the left side of the airbag (4) and close the exhaust port on the right side. Inflate the airbag (4) with the inflation device so that the gas is ejected from the exhaust port on the left side after passing through the airbag (4). The ejected gas generates a reverse force, causing the airbag (4) to move to the right. Similarly, open the exhaust port on the right side and close the exhaust port on the left side so that the gas is ejected from the exhaust port on the right side after passing through the airbag (4). The ejected gas generates a reverse force, causing the airbag (4) to move to the left side. Through the left and right movement of the airbag (4), the flexible screen (1) sways left and right to achieve the purpose of cleaning.

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