Tidal estuary salt resisting and sand discharging system based on hydrodynamic reconstruction

Abstract

The invention provides a tidal estuary salt resisting and desilting system based on hydrodynamic reconstruction, and relates to the technical field of estuary salt resisting and desilting. An outer vertical track, a gate and an inner vertical track are sequentially arranged from an estuary water body to an inland river water body; a first horizontal suspension column and a second horizontal suspension column are sequentially arranged on the outer vertical track from top to bottom in a sliding mode, the second horizontal suspension column comprises a rigid outer layer, a flexible leather film is arranged on the inner side of the rigid outer layer, and a plurality of small holes are formed in the rigid outer layer; an inner permeable membrane is arranged on the inner side of the small hole on the flexible leather membrane; the gate is rotatably mounted on the gate base; and a third horizontal suspension column is arranged on the inner vertical track in a sliding manner. According to the method, the water gate engineering layout can be optimized, and salt resistance, light storage and under-gate scouring and silting are both considered.

Description

Technical Field

[0001] The invention relates to the technical field of estuary salt control and sediment removal, and in particular to a tidal estuary salt control and sediment removal system based on hydrodynamic reconstruction. Background Art

[0002] In winter or dry seasons, salt tides often occur near coastal estuaries. Affected by the upstream salt tide, the salinity of the upstream river increases. When the chlorine content of the river water exceeds 250 mg / L, it cannot meet the requirements of the "Standards for Drinking Water Source Quality". At this time, in order to ensure local living and production water, the water plant has to stop taking water from the river, thus threatening the safety of regional water supply.

[0003] Tidal gates are sluices near tidal estuaries that block tides and prevent brine, drain water and store fresh water. They are important water conservancy projects for dealing with saltwater tides at estuaries. However, traditional tidal gates are difficult to accurately control the stability of the salt-fresh water interface during high and low tide changes, resulting in poor fresh water storage effects or saltwater intrusion. The degree of automation is low, and operations mostly rely on manual judgment and adjustment. There is a lack of intelligent control systems, making it difficult to achieve refined management. In addition, siltation in the tidal gate area is a long-term problem. Existing dredging methods (such as manual dredging or mechanical excavation) are inefficient, time-consuming, and have a great impact on the ecological environment of the river. Frequent physical dredging methods may destroy the stability of the bottom sediment, increase the turbidity of the water body, and affect the living environment of aquatic organisms. . Summary of the invention

[0004] In view of the above-mentioned prior art, the present invention proposes a tidal estuary salt control and sand removal system based on hydrodynamic reconstruction.

[0005] The present invention provides a tidal estuary salt prevention and sand removal system based on hydrodynamic reconstruction, in which an outer vertical track, a gate and an inner vertical track are sequentially arranged from the estuary water body to the inland river water body; a first horizontal suspended column and a second horizontal suspended column are slidably arranged on the outer vertical track from top to bottom in sequence, the second horizontal suspended column comprises a rigid outer layer, a flexible membrane 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 transparent membrane is arranged on the inner side of the small holes on the flexible membrane; the gate is rotatably mounted on the gate base; a third horizontal suspended column is slidably arranged on the inner vertical track.

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

[0007] Preferably, a through-length and concave upper water hole is horizontally provided at the bottom of the gate, a through-length cylinder is provided in the upper water hole, a through-length and convex lower water hole is provided at the lower end of the upper water hole, the bottoms of both sides of the upper water hole are connected with the lower water hole through connecting pipes, a piston is provided inside the connecting pipe, the top of the piston extends into the upper water hole, the bottoms of the connecting pipes on both sides extend into the lower water hole and are respectively connected with two jet sand flushing pipes, a common left valve is provided at the left side outlets of the upper water hole and the lower water hole, a common right valve is provided at the right side outlets of the upper water hole and the lower water hole, and the left valve and the right valve are respectively hinged to the ground through two telescopic support rods.

[0008] Preferably, the gate is connected to a sand flushing box via a hinge on one side close to the inland water body, a left door and a right door are respectively provided on both sides of the sand flushing box, a left magnetic switch and a right magnetic switch are respectively provided at the bottom of the left door and the right door, an iron plate is provided on the ground below the left magnetic switch, and the gate is made of iron material.

[0009] Preferably, either side of the gate is hinged to the ground via a hydraulic telescopic rod.

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

[0011] Compared with the existing technology, the present invention proposes a tidal estuary salt control and sediment removal system based on hydrodynamic reconstruction. On the basis of water volume regulation, it deeply explores the role of hydrodynamics and limited energy in salt control and sediment removal in tidal estuaries through hydrodynamic reconstruction, optimizes the layout of sluice projects, fully taps the potential of the comprehensive benefits of the project, makes up for the shortcomings of the existing technology, and takes into account both salt control and fresh water storage and scouring and silting under the sluice. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a tidal estuary salt and sediment removal system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the application of the second horizontal suspension column in an embodiment of the present invention; Figure 3 Schematic diagram of the structure of the upper water hole and the lower water hole in the embodiment of the present invention; Figure 4 Schematic diagram of the application of the sandbox in the embodiment of the present invention.

[0013] In the figure: 1. inner permeable membrane; 2. rock mass; 3. outer vertical track; 4. gate; 5. inner vertical track; 6. first horizontal suspended column; 7. second horizontal suspended column; 8. fresh-water and salt-water dividing line; 9. rigid outer layer; 10. flexible membrane; 11. salt-water layer; 12. fresh-water layer; 13. third horizontal suspended column; 14. gate base; 15. hydraulic telescopic rod; 16. upper water hole; 17. cylinder; 18. lower water 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 DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific diagrams.

[0015] Example: Figure 1-4 As shown, a tidal estuary salt control and sediment removal system based on hydrodynamic reconstruction is provided with an outer vertical track 3, a gate 4 and an inner vertical track 5 in sequence from the estuary water body to the inland river water body.

[0016] Among them, the outer vertical track 3 includes two track units, which are respectively installed on the rock mass 2 on both sides of the gate 4. The first horizontal suspended column 6 and the second horizontal suspended column 7 are slidably arranged on the outer vertical track 3 from top to bottom. The density of the first horizontal suspended column 6 is less than the density of fresh water.

[0017] Furthermore, in order 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 fresh-salt water interface, that is, the stable position of the gate clockwise deflection. However, since the density difference between the fresh-salt water boundary line 8 is not large, in order to make the suspension column in balance at the fresh-salt water boundary line 8, the second horizontal suspension column 7 is improved. The second horizontal suspension column 7 adopts a two-layer structure, including a rigid outer layer 9, a flexible membrane 10 is arranged on the inner side of the rigid outer layer 9, and a plurality of small holes are arranged on the rigid outer layer 9. The inner side of the small holes on the flexible membrane 10 is arranged as an inner permeable membrane 1, and the inner permeable membrane 1 adopts an artificial semi-permeable membrane that allows water molecules to pass through but chloride ions and sodium ions cannot pass through. If the second horizontal suspension column 7 is in the salt 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, and the inner and outer layers are in a vacuum state, the weight of the second horizontal suspension column 7 is reduced, and the second horizontal suspension column 7 floats. The second horizontal suspended column 7 floats up to the fresh water layer 12 , the inner permeable membrane layer 10 absorbs water through the reverse osmosis membrane, the weight of the second horizontal suspended column 7 increases, the second horizontal suspended column 7 descends, and finally reaches a dynamic equilibrium, with the equilibrium position located at the fresh water and salt water dividing line 8 .

[0018] The inner vertical track 5 also includes two track units, which are respectively installed on the rock mass 2 on both sides of the gate 4. A third horizontal suspension column 13 is slidably arranged on the inner vertical track 5. The density of the third horizontal suspension column 13 is less than the density of fresh water. The outer vertical track 3 and the inner vertical track 5 limit the movement of the three horizontal suspension columns, so that the suspension columns can only move in the vertical direction.

[0019] Among them, the gate 4 can be rotatably installed on the gate base 14. The opening method of the gate 4 is different from the existing tide gate that is lifted upward. Combined with the distribution state of "fresh water above and salt water below" in the tidal estuary, the gate 4 is opened and closed in the form of a flip gate. And unlike the existing lying gate that rotates in one direction, the gate 4 rotates in both directions. When the water level of the estuary water body is higher than the inland river water level, overflow is used to release fresh water into the inland river, and prevent the lower salt water from entering the fresh water; when the water level of the inland river water body is higher than the estuary water body, overflow is used to release fresh water into the estuary to meet the inland river flood control needs. The right side of the gate, that is, the side close to the inland river water body, is hinged to the ground through a hydraulic telescopic rod 15 to support and stretch the gate 4 and maintain the stability of the gate 4.

[0020] Furthermore, a through-length and concave upper water hole 16 is horizontally arranged at the bottom of the gate 4, and a through-length cylinder 17 is arranged in the upper water hole 16. The cylinder 17 is closely tangent to the upper water hole 16, and the cylinder 17 can slide closely against the upper water hole 16 when the gate 4 is flipped. A through-length and upwardly convex lower water hole 18 is provided at the lower end of the upper water hole 16. The bottoms of both sides of the upper water hole 16 are connected to the lower water hole 18 through connecting pipes 19. A piston 20 is provided inside the connecting pipe 19. The top of the piston 20 extends into the upper water hole 16. The bottoms of the connecting pipes 19 on both sides extend into the lower water hole 16 and are respectively connected to two jet sand flushing pipes 21. A common left valve 22 is provided at the left outlet of the upper water hole 16 and the lower water hole 18, and a common right valve 23 is provided at the right outlet of the upper water hole 16 and the lower water hole 18. The left valve 22 and the right valve 23 are respectively hinged to the ground through two telescopic support rods 24, and the telescopic support rod 24 is connected to the left valve 22 and the right valve 23 through a spherical hinge.

[0021] Through the above design, when the gate 4 is in the vertical state, the cylinder 17 is located at the center position where the upper water hole 16 and the lower water hole 18 are connected, isolating the upper water hole 16 and the lower water hole 18. When the gate 4 is flipped clockwise, the cylinder 17 slides to the right, and the cylinder 17 presses the piston 20 on the right side downward, connecting the upper water hole 16 and the lower water hole 18, and the jet sand flushing pipe 21 on the right side starts to work, and the same applies when it is flipped counterclockwise. In addition, when the gate 4 is flipped clockwise, the telescopic support rod 24 of the right valve 23 is compressed, pushing the right valve 23 to move upward along the gate 4, and 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, pulling the left valve 22 to move downward along the gate 4, and the left outlet of the upper water hole 16 is opened. Since the water level on the left side is higher than the water level 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 presses the piston 20 on the right side downward, the upper water hole 16 and the lower water hole 18 are connected, and the jet sand flushing pipe 21 on the right side starts to work, and the same applies when it is turned counterclockwise.

[0022] Furthermore, the gate 4 is connected to a sand flushing box 25 by a hinge on one side close to the inland water body, and a left box door and a right box door are respectively provided on both sides of the sand flushing box 25. A left magnetic switch 26 and a right magnetic switch 27 are respectively provided at the bottom of the left box door and the right box door, and a local iron plate is provided on the ground below the left magnetic switch 26. The gate 4 is made of iron material.

[0023] Through the above design, in the balanced state, the sand flushing box 25 is suspended on the gate 4. When it is flipped clockwise, the left magnetic switch 26 contacts the iron plate, the left magnetic switch 26 opens, the left box door opens, and the jet sand can enter the sand flushing box 25. When it is flipped counterclockwise, the sand flushing box 25 leaves the ground, the left magnetic switch 26 closes due to loss of contact, the left box door closes, and the sand flushing box 25 is flipped to the upper end of the gate 4 under the influence of the right flow. Since the panel of the gate 4 is also made of iron, the right magnetic switch 27 of the contact surface opens, the right box door opens, and the sediment in the sand flushing box 25 can be flushed to the estuary side along the direction of the water flow.

[0024] The tidal estuary salt control and sand removal system can achieve the effect of salt control and fresh water storage in the tidal estuary when applied specifically, as follows: 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 to control the boundary of fresh and salt water), and the real-time height of the third horizontal suspension column 13 is h3; S2, when h1>h3, the tide level is higher than the river level, and the gate 4 rotates and tilts toward the inland river water body, discharging the fresh water outside the gate 4 into the inland river. The final equilibrium position height of the gate 4 is h2, so as to prevent salt water from entering the inland river; S3, when h1=h3, the gate 4 remains in a vertical state; S4. When h1<h3, the tide level is lower than the river level, and the gate 4 rotates and tilts toward the estuary water body side to remove the excess water in the inland river to meet the flood control requirements. The final equilibrium position height of the gate 4 is h1.

[0025] The tidal estuary anti-salt and sand discharge system can also achieve the effect of jet sand flushing and sand collection and discharge of the tidal estuary tide gate when it is applied. The jet sand flushing is controlled by the opening of the gate 4, and the effect of automatic sand flushing can be achieved. The left and right jet sand flushing pipes are each provided with a valve to separate them from the water body. When the gate 4 is in a vertical state, the valve is closed. The specific process is as follows: S1. When h1>h3, the gate 4 turns clockwise, the right valve 23 moves upward along the gate 4, and the left valve 22 moves downward along the gate 4. The left side of the gate 4 supplies water, and the right side flushes the bottom sand; S2. Under the impact of the jet, the silt is flushed into the sand flushing box 25. Under the control of the magnetic switch, as the gate 4 turns counterclockwise, the silt in the sand flushing box 25 can eventually be flushed to the estuary side along the direction of the water flow; S3. When h1<h3, the gate 4 turns counterclockwise, the right valve 23 moves downward along the gate 4, and the left valve 23 moves upward along the gate 4. The right side of the gate 4 supplies water, and the left bottom is washed away by sand. The silt can be washed into the sea along with tidal fluctuations.

[0026] The above are only implementation modes of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure made using the contents of the present invention's specification and drawings, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present invention.

Claims

1. A tidal estuary salt control and sediment removal system based on hydrodynamic reconstruction, characterized in that: An outer vertical track, a gate and an inner vertical track are arranged in sequence from the estuary water body to the inland river water body; a first horizontal suspended column and a second horizontal suspended column are slidably arranged on the outer vertical track from top to bottom, the second horizontal suspended column comprises a rigid outer layer, a flexible membrane 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 transparent membrane is arranged on the inner side of the small holes on the flexible membrane; the gate is rotatably mounted on the gate base; a third horizontal suspended column is slidably arranged on the inner vertical track.

2. The tidal estuary salt control and sediment removal system based on hydrodynamic reconstruction according to claim 1 is characterized in that: The inner permeable membrane is an artificial semi-permeable membrane.

3. The tidal estuary salt control and sediment removal system based on hydrodynamic reconstruction according to claim 1 or 2, characterized in that: A through-length and concave upper water hole is horizontally arranged at the bottom of the gate, a through-length cylinder is arranged in the upper water hole, a through-length and convex lower water hole is arranged at the lower end of the upper water hole, the bottoms of both sides of the upper water hole are connected with the lower water hole through connecting pipes, a piston is arranged inside the connecting pipe, the top of the piston extends into the upper water hole, the bottoms of the connecting pipes on both sides extend into the lower water hole and are respectively connected with two jet sand flushing pipes, a common left valve is arranged at the left side outlets of the upper water hole and the lower water hole, a common right valve is arranged at the right side outlets of the upper water hole and the lower water hole, and the left valve and the right valve are respectively hinged to the ground through two telescopic support rods.

4. The tidal estuary salt control and sediment removal system based on hydrodynamic reconstruction according to claim 3 is characterized in that: The gate is connected to a sand flushing box via a hinge on one side close to the inland water body, and a left box door and a right box door are respectively provided on both sides of the sand flushing box. A left magnetic switch and a right magnetic switch are respectively provided at the bottom of the left box door and the right box door, and an iron plate is provided on the ground below the left magnetic switch. The gate is made of iron material.

5. The tidal estuary salt control and sediment removal system based on hydrodynamic reconstruction according to claim 1 or 2, characterized in that: Either side of the gate is hinged to the ground via a hydraulic telescopic rod.

6. The tidal estuary salt control and sediment removal system based on hydrodynamic reconstruction 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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