Tidal estuary salt and sediment discharge system based on hydrodynamic reconstruction

Abstract

The application provides a tidal estuary salt control and sediment discharge system based on water power reconstruction, and relates to the technical field of estuary salt control and sediment discharge. An outer vertical track, a gate and an inner vertical track are sequentially arranged from the estuary water body to the inner river water body. A first horizontal suspension column and a second horizontal suspension column are sequentially and slidably arranged on the outer vertical track from top to bottom. The second horizontal suspension column comprises a rigid outer layer. A flexible skin film is arranged on the inner side of the rigid outer layer. A plurality of small holes are arranged on the rigid outer layer. An inner permeable membrane is arranged on the inner side of the small holes of the flexible skin film. The gate is rotatably installed on a gate base. A third horizontal suspension column is slidably arranged on the inner vertical track. The application can optimize the layout of the water gate project and take into account salt storage and fresh water storage and scouring and silting under the gate.

Description

TECHNICAL FIELD

[0001] The application relates to a tidal estuary salt discharge system based on water power reconstruction. BACKGROUND

[0002] In winter or dry season, salt tide often occurs near a coastal estuary. Influenced by the salt tide, the salinity of the upstream river channel increases, and when the chlorine content of the river water exceeds 250 mg / L, the water quality cannot meet the requirements of the Water Quality Standard for Drinking Water Sources. At this time, in order to ensure the local life and production water, the water supply plant has to stop taking water from the river, thereby threatening the regional water supply safety.

[0003] The tide gate is a water gate for blocking tide, resisting salt, draining water and storing fresh water near the tidal estuary, and is an important water conservancy project for dealing with the salt tide upstream of the estuary. However, the traditional tide gate is difficult to accurately control the stability of the salt and fresh water interface during the high and low tide change, resulting in poor storage of fresh water or salt water intrusion. The automation degree is low, and the operation is mostly dependent on manual judgment and adjustment, lacking an intelligent control system, and it is difficult to realize fine management. And the sediment deposition in the tide gate area is a long-term problem, and the existing dredging methods (such as manual dredging or mechanical excavation) are low in efficiency, time-consuming, and have a great impact on the ecological environment of the river. Frequent physical dredging methods may damage the stability of the sediment, increase the turbidity of the water, and affect the living environment of aquatic organisms. SUMMARY

[0004] In view of the above prior art, the application provides a tidal estuary salt discharge system based on water power reconstruction.

[0005] The tidal estuary salt discharge system based on water power reconstruction provided by the application is characterized in that from the estuary water body to the inland water body, an outer vertical track, a gate and an inner vertical track are sequentially arranged; a first horizontal suspension column and a second horizontal suspension column are sequentially and slidably arranged on the outer vertical track from top to bottom; the second horizontal suspension column comprises a rigid outer layer, a flexible skin film is arranged on the inner side of the rigid outer layer, a plurality of small holes are arranged on the rigid outer layer, and an inner permeable membrane is arranged on the flexible skin film on the inner side of the small holes; the gate is rotatably installed on a gate base; and a third horizontal suspension column is slidably arranged on the inner vertical track.

[0006] Preferably, the inner permeable membrane is an artificial semi-permeable membrane.

[0007] Preferably, the bottom of the gate is provided with an upper water hole which is longitudinally and concave downward, a cylinder is arranged in the upper water hole, the lower end of the upper water hole is provided with a lower water hole which is longitudinally and convex upward, the bottom of the two sides of the upper water hole is connected with the lower water hole through a communication pipe, the inside of the communication pipe is provided with a piston, the top of the piston extends into the upper water hole, the bottom of the two sides of the communication pipe extends into the lower water hole and is connected with two jet sand pipes respectively, the left outlet of the upper water hole and the lower water hole is provided with a common left valve, the right outlet of the upper water hole and the lower water hole is provided with a common right valve, and the left valve and the right valve are respectively hinged to the ground through two telescopic supporting rods.

[0008] Preferably, the gate is hingedly connected with a sand flushing box near the side close to the inner river water body, the two sides of the sand flushing box are respectively provided with a left box door and a right box door, the bottom of the left box door and the right box door is respectively provided with a left magnetic switch and a right magnetic switch, an iron plate is arranged on the ground below the left magnetic switch, and the gate is made of iron material.

[0009] Preferably, any side of the gate is hingedly connected to the ground through a hydraulic telescopic rod.

[0010] Preferably, the density of the first horizontal suspension column and the third horizontal suspension column is less than the density of fresh water.

[0011] Compared with the prior art, the tide estuary salt control and sand flushing system based on water power reconstruction disclosed by the application optimizes the water gate engineering layout, fully taps the comprehensive benefits of the engineering, makes up for the deficiencies of the prior art, and takes into account salt control and fresh water storage and scouring and silting under the gate. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 FIG. 1 is a structural schematic view of a tide estuary salt control and sand flushing system in an embodiment of the application;

[0013] Figure 2 FIG. 4 is an application schematic view of a second horizontal suspension column in an embodiment of the application;

[0014] Figure 3 FIG. 6 is a structural schematic view of an upper water hole and a lower water hole in an embodiment of the application;

[0015] Figure 4 FIG. 8 is an application schematic view of a sand flushing box in an embodiment of the application.

[0016] In the diagram: 1. Inner permeable membrane; 2. Rock mass; 3. Outer vertical track; 4. Gate; 5. Inner vertical track; 6. First horizontal suspension column; 7. Second horizontal suspension column; 8. Freshwater / saltwater boundary line; 9. Rigid outer layer; 10. Flexible membrane; 11. Saltwater layer; 12. Freshwater layer; 13. Third horizontal suspension column; 14. Gate base; 15. Hydraulic telescopic rod; 16. Upper water passage hole; 17. Cylinder; 18. Lower water passage hole; 19. Connecting pipe; 20. Piston; 21. Jet sand flushing pipe; 22. Left valve; 23. Right valve; 24. Telescopic support rod; 25. Sand flushing box; 26. Left magnetic switch; 27. Right magnetic switch. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0018] Example: Figures 1-4 As shown, a tidal estuary salt control and sediment discharge system based on hydrodynamic reconstruction is provided with an outer vertical track 3, a gate 4 and an inner vertical track 5 arranged sequentially from the estuary water body to the inland water body.

[0019] The outer vertical track 3 includes two track units, which are installed on the rock mass 2 on both sides of the gate 4 respectively. The outer vertical track 3 is provided with a first horizontal suspension column 6 and a second horizontal suspension column 7 slidably arranged from top to bottom. The density of the first horizontal suspension column 6 is less than that of fresh water.

[0020] Furthermore, to ensure that the overflow water at the top of the gate is all fresh water, it is necessary to determine the position of the saline-salt water interface, i.e., the stable position when the gate is deflected clockwise. However, since the density difference above and below the saline-salt water boundary line 8 is not significant, the second horizontal suspension column 7 is modified to ensure that the suspension column is in equilibrium at the saline-salt water boundary line 8. The second horizontal suspension column 7 adopts a two-layer structure, including a rigid outer layer 9. A flexible membrane 10 is provided on the inner side of the rigid outer layer 9. Several small holes are provided on the rigid outer layer 9. An inner permeable membrane 1 is provided on the flexible membrane 10 inside the small holes. The inner permeable membrane 1 is an artificial semi-permeable membrane that allows water molecules to pass through but prevents chloride and sodium ions from passing through. If the second horizontal suspension column 7 is in the saline water layer 11, the salt concentration of the outer layer is greater than that of the inner layer. The inner layer loses water and shrinks, creating a vacuum state between the inner and outer layers. The weight of the second horizontal suspension column 7 decreases, and the second horizontal suspension column 7 floats. The second horizontal suspension column 7 floats to the freshwater layer 12, and the flexible membrane 10 absorbs water through the reverse osmosis membrane. The weight of the second horizontal suspension column 7 increases, and the second horizontal suspension column 7 descends, eventually reaching a dynamic equilibrium. The equilibrium position is located at the freshwater boundary line 8.

[0021] The inner vertical track 5 also comprises two track units installed on the rock mass 2 on both sides of the gate 4, and a third horizontal suspension column 13 is slidably arranged on the inner vertical track 5, and the density of the third horizontal suspension column 13 is less than the density of fresh water. The movement of the three horizontal suspension columns is limited by the outer vertical track 3 and the inner vertical track 5, so that the suspension columns can only move in the vertical direction.

[0022] The gate 4 is rotatably installed on the gate base 14. The opening mode of the gate 4 is different from that of the existing tide gate which is lifted upward. In combination with the distribution state of "fresh water on the top and salt water on the bottom" in the tidal estuary, the gate 4 is opened and closed in the form of a turnover gate, and is different from the existing horizontal gate which rotates in a single direction. The gate 4 rotates in both directions. When the water level of the estuary is higher than that of the inner river, the overflow releases fresh water into the inner river, and prevents the lower salt water from entering the fresh water. When the water level of the inner river is higher than that of the estuary, the overflow releases fresh water into the estuary to meet the demand for flood control in the inner river. The right side of the gate, i.e. the side close to the inner river water body, is connected to the ground by a hydraulic telescopic rod 15 to support and stretch the gate 4 and maintain the stability of the gate 4.

[0023] Further, the bottom of the gate 4 is provided with a longitudinally and concave upper water hole 16, a cylindrical body 17 is arranged in the upper water hole 16, the cylindrical body 17 is tangent to the upper water hole 16, and the cylindrical body 17 can slide closely to the upper water hole 16 when the gate 4 is turned over. The lower end of the upper water hole 16 is provided with a longitudinally and convex lower water hole 18, the bottom of the upper water hole 16 on both sides is connected to the lower water hole 18 through a communication pipe 19, the inside of the communication pipe 19 is provided with a piston 20, the top of the piston 20 extends into the upper water hole 16, the bottom of the communication pipe 19 on both sides extends into the lower water hole 18 and is connected to two jet sand pipes 21 respectively, the left outlet of the upper water hole 16 and the lower water hole 18 is provided with a common left valve 22, and the right outlet of the upper water hole 16 and the lower water hole 18 is provided with a common right valve 23. The left valve 22 and the right valve 23 are respectively connected to the ground through two telescopic support rods 24, and the telescopic support rods 24 are connected to the left valve 22 and the right valve 23 through a spherical hinge.

[0024] Through the above design, when the gate 4 is in vertical state, the cylinder 17 is located at the center position connected with the upper water hole 16 and the lower water hole 18, and the upper water hole 16 and the lower water hole 18 are isolated. When the gate 4 is rotated clockwise, the cylinder 17 slides to the right, and the cylinder 17 extrudes the piston 20 on the right side downward, so that the upper water hole 16 and the lower water hole 18 are connected, and the right jet flushing pipe 21 starts to work. When the gate 4 is rotated counterclockwise, the same is true. In addition, when the gate 4 is rotated clockwise, the telescopic support rod 24 of the right valve 23 is pressed, and the right valve 23 is pushed to move upward along the gate 4, so that the right outlet of the lower water hole 18 is opened. At the same time, the telescopic support rod 24 of the left valve 22 is pulled, and the left valve 22 is pulled to move downward along the gate 4, so that the left outlet of the upper water hole 16 is opened. Since the water level on the left side is higher than that on the right side, water enters the upper water hole 16. At the same time, since the cylinder 17 slides to the right along the upper water hole 16 and extrudes the piston 20 on the right side downward, the upper water hole 16 and the lower water hole 18 are connected, and the right jet flushing pipe 21 starts to work. When the gate 4 is rotated counterclockwise, the same is true.

[0025] Further, the gate 4 is connected with a flushing box 25 through a hinge on the side close to the inner river water body. The flushing box 25 is provided with a left box door and a right box door on the two sides, respectively. The bottom of the left box door and the right box door is respectively provided with a left magnetic switch 26 and a right magnetic switch 27. A local iron plate is arranged on the ground below the left magnetic switch 26. The gate 4 is made of iron material.

[0026] Through the above design, in the balanced state, the flushing box 25 is suspended on the gate 4. When the gate 4 is rotated clockwise, the left magnetic switch 26 contacts with the iron plate, the left magnetic switch 26 is opened, the left box door is opened, and the jet flushing can enter the flushing box 25. When the gate 4 is rotated counterclockwise, the flushing box 25 is away from the ground, the left magnetic switch 26 is closed due to the loss of contact, the left box door is closed, the flushing box 25 is rotated to the upper end of the gate 4 under the influence of the right side flow, and the right magnetic switch 27 on the contact surface is opened due to the iron plate of the gate 4, so that the right box door is opened. The sand in the flushing box 25 can be flushed to the estuary side along the water flow direction.

[0027] The tidal estuary salt flushing system can achieve the effect of tidal estuary salt storage and fresh water storage in specific application, and the specific effect is as follows.

[0028] S1, assuming that the real-time height of the first horizontal suspension column 6 is h1, the real-time height of the second horizontal suspension column 7 is h2 (used for controlling the fresh salt water boundary), and the real-time height of the third horizontal suspension column 13 is h3;

[0029] S2, when h1>h3, at this time, the tidal water level is higher than the river water level, the gate 4 is rotated and tilted to the inner river water body side, the fresh water outside the gate 4 is discharged into the inner river, and the final balanced position height of the gate 4 is h2, so as to prevent salt water from entering the inner river;

[0030] S3, when h1=h3, the gate 4 keeps vertical state;

[0031] S4, when h1

[0032] The tidal estuary salt discharge system can also achieve the effects of jet flow sand flushing and sand collecting and discharging of the tidal estuary tide gate in specific application. The jet flow sand flushing is controlled by the opening of the gate 4, and the automatic sand flushing effect can be achieved. The left and right jet flow sand flushing pipes are respectively provided with valves and separated from the water body. The valves are closed when the gate 4 is in the vertical state. The specific process is as follows:

[0033] S1, when h1

[0034] S2, under the jet flow impact, the sand is flushed into the sand flushing box 25. Under the control of the magnetic switch, with the counterclockwise rotation of the gate 4, the sand in the sand flushing box 25 can finally be flushed to the side of the estuary along the water flow direction.

[0035] S3, when h1

[0036] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure, direct or indirect application in other related technical fields based on the content of the specification and drawings of the present application is also within the patent protection scope of the present application.

Claims

1. A hydrodynamically reconfigured tidal estuary salinity flushing sediment system, characterized in that, The outer vertical track, the gate and the inner vertical track are arranged in the river mouth water body and the river water body in sequence; the first horizontal suspension column and the second horizontal suspension column are slidably arranged on the outer vertical track from top to bottom; the second horizontal suspension column comprises a rigid outer layer, the inner side of the rigid outer layer is provided with a flexible skin film, a plurality of small holes are arranged on the rigid outer layer, and the inner side of the flexible skin film located in the small holes is provided with an inner permeable membrane; the gate is rotatably installed on the gate base; the third horizontal suspension column is slidably arranged on the inner vertical track; the bottom of the gate is provided with an upper water passing hole which is concave downward and extends through the gate; a cylindrical body extending through the gate is arranged in the upper water passing hole; the lower end of the upper water passing hole is provided with a lower water passing hole which extends through the gate and is convex upward; the bottom of the upper water passing hole is connected with the lower water passing hole through a communication pipe; the inside of the communication pipe is provided with a piston; the top of the piston extends into the upper water passing hole; the bottom of the communication pipe on both sides extends into the lower water passing hole and is connected with two jet sand flushing pipes respectively; the left outlet of the upper water passing hole and the lower water passing hole is provided with a common left valve; the right outlet of the upper water passing hole and the lower water passing hole is provided with a common right valve; the left valve and the right valve are respectively connected with the ground through two telescopic support rods; the gate is connected with a sand flushing box through a hinge on the side close to the river water body; the sand flushing box is provided with a left box door and a right box door on both sides; the bottom of the left box door and the right box door is respectively provided with a left magnetic switch and a right magnetic switch; an iron plate is arranged on the ground below the left magnetic switch; the gate is made of iron material.

2. The hydrodynamically reconfigured tidal estuary salt barrier sand flushing system of claim 1, wherein, The inner permeable membrane is an artificial semi-permeable membrane.

3. The hydrodynamically reconfigured tidal estuary salt barrier sand flushing system of claim 1 or 2, wherein, Any side of the gate is connected with the ground through a hydraulic telescopic rod.

4. The hydrodynamically reconstructed estuary salinity flushing system based on tides according to claim 1 or 2, characterized in that, The density of the first horizontal suspension column and the third horizontal suspension column is less than the density of fresh water.

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