Reservoir model intake muddy water flow control device

Abstract

The present application relates to a kind of reservoir model muddy water flow control equipment, the reservoir model entrance of the system is equipped with flow automatic control box, the bottom and middle of flow control baffle in control box are equipped with several water outlet holes of size increasing in turn at equal intervals, water outlet chamber and reservoir chamber are arranged on the both sides of flow control baffle, muddy water in water outlet chamber enters into reservoir chamber from water outlet hole, and from the water outlet of reservoir chamber bottom surface into the reservoir model entrance, simultaneously, each water outlet hole is correspondingly provided with a water outlet hole sealing element, water outlet hole sealing element and the piston rod of air cylinder are fixedly connected, the sealing element is opened or closed water outlet by the extension of piston rod, and the water outlet of different sizes can control the different flow of muddy water, so as to accurately control the reservoir flow of muddy water, simulate the flow pattern and sediment transport state of prototype reservoir, improve the simulation precision of reservoir model water and sediment transport.

Description

Technical Field

[0001] This invention relates to the field of reservoir inflow control equipment, and more particularly to a reservoir model inflow turbid water control equipment. Background Technology

[0002] my country has numerous rivers, and soil erosion is severe. Most rivers have water conservancy projects built on them. Besides providing comprehensive benefits such as flood control, irrigation, water supply, and power generation, these projects alter the boundary conditions for sediment transport, especially for sediment-laden rivers, where their sediment retention and reduction benefits are of paramount importance. Reservoirs, with their comprehensive functions of flood control, irrigation, water supply, and power generation, play an irreplaceable role in the economic development and environmental protection of river basins. Statistics show that the global annual sediment deposition rate in reservoirs is 0.5–1.0%, while in my country it is 1.0–2.0%, particularly in the Yellow River basin and some reservoirs in Northwest China, where the annual deposition rate reaches 2.0–4.0%. The problem of reservoir sediment deposition is extremely prominent. Large amounts of sediment deposition directly reduce the functionality, safety, and overall benefits of reservoirs, impacting the water environment and aquatic ecosystems. In severe cases, it can even lead to reservoir decommissioning, dam failures, and other incidents, further exacerbating water scarcity and increasing the probability of floods.

[0003] Comprehensive management of reservoir sediment is a common concern throughout the construction, operation, and supervision of reservoirs. Insufficient consideration of sediment management during the design or operation phases not only affects the normal operation of the reservoir but also hinders the realization of its comprehensive benefits. Currently, research on the mechanisms of sediment discharge by density currents, the scouring and deposition patterns of dammed sluices, and the transport patterns of floating mud in reservoirs is inadequate. Therefore, it is necessary to utilize reservoir models to simulate the sediment transport patterns. In existing reservoir model tests, the high-sediment-content turbid water is typically manually pumped through pipelines to the reservoir model inlet using mud pumps. This method suffers from the inability to accurately control the inflow rate of turbid water, failing to realistically simulate the sediment transport patterns and affecting the accuracy of the water and sediment transport simulation in the reservoir model. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a device for controlling the flow rate of turbid water entering a reservoir model.

[0005] The technical solution of this invention is: a reservoir model turbid water inflow control device, comprising a turbid water conveying pipeline and a flow control box, wherein the flow control box is provided with four vertical support legs at its four corners, characterized in that:

[0006] The flow control box is a square box. The middle of the flow control box has a flow control partition that extends to the bottom and top of the box at both ends. A cylinder support partition that extends to the bottom of the box is located on one side of the flow control partition. An inlet chamber is formed between the cylinder support partition and the flow control partition. A cylinder assembly chamber is formed on the outer side of the cylinder support partition. An overflow partition that extends to the bottom of the box is located on the other side of the flow control partition. An outlet chamber is formed between the overflow partition and the flow control partition. An overflow chamber is formed between the overflow partition and the square box. A certain distance is provided between the upper end of the overflow partition and the upper surface of the flow control box to form an overflow outlet.

[0007] The bottom surface of the storage compartment is provided with a water outlet. The bottom and middle of the flow control partition are provided with several water outlets at equal intervals along the length direction. The size of the water outlet in the middle and the size of the water outlet at the bottom increase proportionally, and the size of the water outlet at the bottom is larger than that at the top. The middle and bottom of the cylinder assembly compartment are fixedly connected to several cylinders by support plates. The positions of the cylinders correspond one-to-one with the positions of the water outlets. The cylinder support partition is provided with several circular holes that are coaxial with the piston rods of the cylinders. The piston rods of the cylinders extend into the storage compartment through the circular holes, and the outer end of the extended piston rod is coaxially fixedly connected to a water outlet seal corresponding to the water outlet.

[0008] The turbid water conveying pipeline is configured as a U-shaped pipe capable of forming a loop. The U-shaped pipe is fixedly connected above the flow control box by a portal frame bracket. The turbid water conveying pipeline is equipped with an outlet pipe located directly above the flow control box.

[0009] Preferably, there are two water outlet pipes arranged side by side, one of which is equipped with an electromagnetic control valve and the other with a manual valve.

[0010] Preferably, an electromagnetic flow meter is connected to the turbid water conveying pipeline via a flange.

[0011] Preferably, the bottom surfaces of both the outlet chamber and the overflow chamber are designed as conical bottoms to facilitate sewage discharge, with a sewage discharge pipe located in the middle of the conical bottom and a sealing cap inside the conical bottom for sealing the sewage discharge pipe.

[0012] Preferably, the inlet and outlet of the reservoir is a square opening, and the lower end of the square opening is connected to a slow-flow pipe with a square cross-section. The slow-flow pipe includes a horizontal section in the middle and vertical sections on both sides, and is connected to the inlet and outlet of the reservoir through the inner vertical section.

[0013] Preferably, a sealing sleeve is fitted inside the circular hole of the cylinder support partition, and the piston rod of the cylinder is slidably fitted into the sealing sleeve.

[0014] Preferably, the water outlet seal at the outer end of the piston rod of the middle cylinder is a cylindrical seal, and the water outlet seal at the outer end of the piston rod of the bottom cylinder is a frustum-shaped seal.

[0015] Preferably, the inner end face of the cylindrical seal or the frustum-shaped seal is provided with a blind hole at the center, and the piston rod is fitted into the blind hole. The outer end face of the cylindrical seal or the frustum-shaped seal is provided with a groove at the center, and a through hole communicating with the blind hole is provided in the middle of the groove. An internal hexagonal screw is inserted into the through hole, and the outer end of the screw is inserted into a threaded hole provided at the center of the outer end face of the piston rod.

[0016] Preferably, the groove is provided with an annular sealing gasket, the screw head of the hexagonal screw is pressed on the annular sealing gasket, the blind hole is provided with an annular sealing gasket, and the outer end face of the piston rod is pressed on the annular sealing gasket.

[0017] The beneficial technical effects of this invention are:

[0018] First, the reservoir model of the present invention is equipped with a flow control box at the inlet. The flow control box has a number of outlet holes of progressively larger size at equal intervals at the bottom and middle of the flow control baffle. The flow control baffle has an outlet chamber and an inlet chamber on both sides. Turbid water in the outlet chamber enters the inlet chamber through the outlet hole and is discharged to the reservoir model inlet through the outlet on the bottom surface of the inlet chamber. At the same time, each outlet hole is equipped with an outlet hole seal. The outlet hole seal is fixedly connected to the piston rod of the cylinder. The extension and retraction of the piston rod controls the opening or closing of the outlet hole. Different sized outlet holes can control different flow rates of turbid water. Therefore, the inlet flow rate of turbid water can be precisely controlled, simulating the water flow pattern and sediment transport pattern of the prototype reservoir, and improving the simulation accuracy of water and sediment transport in the reservoir model. The present invention has an overflow chamber on one side of the outlet chamber. The turbid water in the turbid water conveying pipe is first discharged into the overflow chamber, and then enters the outlet chamber from the overflow port at the upper end of the overflow baffle. The turbid water overflowing into the outlet chamber has a gentler flow rate, causing less impact on the outlet chamber and not affecting the normal flow rate of the turbid water flowing out of the outlet. The simulation experiment results are more accurate.

[0019] Secondly, the turbid water conveying pipeline of the present invention is a U-shaped pipeline, which forms a closed loop with the turbid water pool. During the process of discharging turbid water to the flow control box through the outlet pipe on the U-shaped pipe, the turbid water can flow back into the turbid water pool from the U-shaped pipe. Therefore, the process of discharging water is accompanied by the circulation of turbid water, which avoids the sediment in the turbid water from settling in the turbid water pool, and ensures that turbid water with a consistent concentration is provided, resulting in better test results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the structural relationship between the turbid water conveying pipeline, the flow control box, and the model reservoir inlet of the present invention;

[0021] Figure 2 This is one of the three-dimensional structural schematic diagrams of the flow control box of the present invention;

[0022] Figure 3 This is the second three-dimensional structural schematic diagram of the flow control box of the present invention;

[0023] Figure 4 This is a top view of the flow control box of the present invention;

[0024] Figure 5 yes Figure 4 Sectional view along axis AA;

[0025] Figure 6 yes Figure 4 BB-direction sectional view;

[0026] Figure 7 yes Figure 6 A magnified view of a portion of the image;

[0027] Figure 8 yes Figure 4 CC-direction sectional view;

[0028] Figure 9 This is a schematic diagram showing the connection relationship between the cylindrical seal and the piston rod of the present invention;

[0029] Figure 10 This is a schematic diagram showing the connection relationship between the frustum-shaped seal and the piston rod of the present invention.

[0030] In the diagram, 01. Turbid water conveying pipe, 11. U-shaped support, 12. Outlet pipe, 13. Electromagnetic control valve, 14. Manual valve, 15. Electromagnetic flow meter, 02. Flow control box, 21. Vertical support leg, 22. Flow control baffle, 221. Outlet hole, 222. Triangular reinforcing rib, 23. Cylinder support baffle, 231. Sealing sleeve, 24. Overflow baffle, 25. Overflow chamber, 251. Overflow port, 26. Storage chamber, 261. 27. Inlet / outlet, 28. Outlet chamber, 291. Cylinder assembly chamber, 202. Support plate, 293. Cylinder, 294. Piston rod, 295. Cylindrical seal, 296. Frustum seal, 297. Groove, 298. Blind hole, 299. Hexagonal screw, 290. Annular gasket, 291. Through hole, 302. Conical bottom, 303. Sewage pipe, 304. Sealing cap, 405. Slow-flow pipe, 506. Model reservoir inlet. Detailed Implementation

[0031] Example 1, see appendix to the instruction manual. Figure 1- 10. A flow control device for turbid water entering a reservoir model, comprising a turbid water conveying pipeline and a flow control box. The flow control box has four vertical support legs at its four corners, and is supported above the inlet of the reservoir model by these legs. The flow control box is a square box, with a flow control partition extending to the bottom and top of the box at both ends in the middle. A cylinder support partition extending to the bottom of the box is located at the lower end of one side of the flow control partition. The cylinder support partition and the flow control partition... An inlet chamber is formed between the two sides, and a cylinder assembly chamber is formed on the outer side of the cylinder support partition. An overflow partition extending to the bottom of the box is provided on the other side of the flow control partition. An outlet chamber is formed between the overflow partition and the flow control partition. An overflow chamber is formed between the overflow plate and the square box. A certain distance is provided between the upper end of the overflow partition and the upper end face of the flow control box to form an overflow port. After the turbid water in the turbid water conveying pipe is discharged into the overflow chamber, it is discharged into the outlet chamber from the overflow port. The water flow into the outlet chamber is more stable.

[0032] The flow control baffle has a triangular reinforcing rib in the middle to prevent deformation of the flow control baffle from causing the outlet hole seal to not seal properly. The entire flow control box is made of stainless steel to prevent rust and improve its service life.

[0033] The bottom surface of the storage compartment is provided with a water outlet. The bottom and middle of the flow control partition are provided with several circular drainage holes at equal intervals along the length direction. The size of the drainage hole in the middle and the size of the bottom water outlet increase proportionally, and the size of the lower water outlet is larger than that of the upper water outlet. Several cylinders are fixedly connected to the middle and bottom of the cylinder assembly compartment through support plates. The positions of the cylinders correspond one-to-one with the positions of the water outlets. The cylinder support partition is provided with several circular holes that are coaxial with the piston rods of the cylinders. The piston rods of the cylinders extend into the storage compartment through the circular holes. The outer end of the extended piston rod is coaxially fixedly connected to a water outlet seal corresponding to the water outlet. The water outlet is blocked or opened by the seal. The opening or closing of different water outlets can be controlled individually by different cylinders.

[0034] The turbid water conveying pipeline is configured as a U-shaped pipe capable of forming a loop. The U-shaped pipe is fixedly connected above the flow control box by a portal frame bracket. The turbid water conveying pipeline is equipped with an outlet pipe located directly above the flow control box.

[0035] The water outlet pipes are arranged side by side. One water outlet pipe is equipped with an electromagnetic control valve, which enables automatic control of the water outlet pipe. The other water outlet pipe is equipped with a manual valve, which can also be used for manual control.

[0036] An electromagnetic flow meter is connected to the turbid water conveying pipeline via a flange, and the flow rate of the turbid water in the conveying pipeline is monitored by the electromagnetic flow meter.

[0037] The bottom surfaces of both the outlet chamber and the overflow chamber are designed with a conical bottom to facilitate sewage discharge. A sewage pipe is located in the middle of the conical bottom. The conical bottom facilitates the discharge of silt and sand accumulated at the bottom of the outlet chamber and the overflow chamber, and facilitates the discharge of silt and sand when cleaning the flow control box. A sealing cover is provided inside the conical bottom to seal the sewage pipe. After the test, the sealing cover is opened to rinse away the silt and sand remaining at the bottom and discharge it from the sewage pipe.

[0038] The inlet and outlet of the reservoir are designed as square openings. The lower end of the square opening is connected to a slow-flow pipe with a square cross-section. The slow-flow pipe includes a horizontal section in the middle and vertical sections on both sides. It connects to the inlet and outlet of the reservoir through the inner vertical section. When the turbid water is discharged, it first passes through the vertical section, then through the horizontal section, and finally exits from the vertical section, which plays a role in slowing down the flow and reducing the scouring of the reservoir model inlet.

[0039] A sealing sleeve is fitted inside the round hole of the cylinder support partition. A water sealing ring is provided inside the sealing sleeve. The piston rod of the cylinder slides into the sealing sleeve to prevent muddy water from leaking from the piston rod.

[0040] The water outlet seal at the outer end of the piston rod of the middle cylinder is a cylindrical seal, and different cylindrical seals are set according to different outlet sizes. The water outlet seal at the outer end of the piston rod of the bottom cylinder is a frustum-shaped seal. The outlet size corresponding to the frustum-shaped seal is larger. This structure can reduce the weight of the frustum-shaped seal while improving its structural strength.

[0041] The cylindrical or frustum-shaped seal has a blind hole at its inner end face center, into which the piston rod is fitted. The outer end face of the cylindrical or frustum-shaped seal has a groove at its center, with a through hole in the middle of the groove communicating with the blind hole. A hexagonal screw is inserted into the through hole, and the outer end of the screw is inserted into a threaded hole at the center of the outer end face of the piston rod. The nut of the hexagonal screw is hidden in the groove, thus not affecting the sealing effect of the seal. Furthermore, this design allows for easy replacement of the seal simply by unscrewing the hexagonal screw, facilitating seal replacement and maintenance. An annular sealing gasket is provided in the groove, with the screw head of the hexagonal screw pressing against it. An annular sealing gasket is also provided in the blind hole, with the outer end face of the piston rod pressing against it.

[0042] The working process and principle of this invention are as follows:

[0043] When using this system to control the inflow of turbid water into the reservoir, the mud pump in the turbid water tank draws the turbid water into the turbid water delivery pipe, and then discharges it into the overflow chamber of the flow control box through the drain pipe. From there, it flows into the outlet chamber from the overflow port above the overflow baffle. The turbid water flowing into the outlet chamber has a gentler flow velocity, resulting in less impact. Then, the turbid water entering the outlet chamber enters the inflow chamber through the outlet hole and is discharged into the reservoir model inlet from the outlet at the bottom of the inflow chamber. Each outlet hole is equipped with a corresponding outlet hole seal, which is fixedly connected to the piston rod of the cylinder. The piston rod's extension and retraction control the opening or closing of the outlet hole. One or more outlet holes can be opened simultaneously. Different sizes of outlet holes can control different flow rates of turbid water. Therefore, the inflow of turbid water into the reservoir can be automatically and accurately controlled, simulating the water flow pattern and sediment transport state of the prototype reservoir, thus improving the accuracy of water and sediment transport simulation in the reservoir model.

Claims

1. A reservoir model inflow turbid water flow control device, comprising a turbid water conveying pipeline and a flow control box, wherein the flow control box is provided with four vertical support legs at its four corners, characterized in that: The flow control box is a square box. The middle of the flow control box has a flow control partition that extends to the bottom and top of the box at both ends. A cylinder support partition that extends to the bottom of the box is located on one side of the flow control partition. An inlet chamber is formed between the cylinder support partition and the flow control partition. A cylinder assembly chamber is formed on the outer side of the cylinder support partition. An overflow partition that extends to the bottom of the box is located on the other side of the flow control partition. An outlet chamber is formed between the overflow partition and the flow control partition. An overflow chamber is formed between the overflow partition and the square box. A certain distance is provided between the upper end of the overflow partition and the upper surface of the flow control box to form an overflow outlet. The bottom surface of the storage compartment is provided with a water outlet. The bottom and middle of the flow control partition are provided with several water outlets at equal intervals along the length direction. The size of the water outlet in the middle and the size of the water outlet at the bottom increase proportionally, and the size of the water outlet at the bottom is larger than that at the top. The middle and bottom of the cylinder assembly compartment are fixedly connected to several cylinders by support plates. The positions of the cylinders correspond one-to-one with the positions of the water outlets. The cylinder support partition is provided with several circular holes that are coaxial with the piston rods of the cylinders. The piston rods of the cylinders extend into the storage compartment through the circular holes, and the outer end of the extended piston rod is coaxially fixedly connected to a water outlet seal corresponding to the water outlet. The turbid water conveying pipeline is configured as a U-shaped pipe capable of forming a loop. The U-shaped pipe is fixedly connected above the flow control box by a portal frame bracket. The turbid water conveying pipeline is provided with an outlet pipe located directly above the flow control box. The inlet and outlet of the reservoir are designed as square openings. The lower end of the square opening is connected to a slow-flow pipe with a square cross-section. The slow-flow pipe includes a horizontal section in the middle and vertical sections on both sides. The vertical section on the inner side connects to the inlet and outlet of the reservoir. The water outlet seal at the outer end of the piston rod of the middle cylinder is a cylindrical seal, and the water outlet seal at the outer end of the piston rod of the bottom cylinder is a frustum-shaped seal.

2. The reservoir model inflow turbidity control device according to claim 1, characterized in that: The water outlet pipes are arranged in two parallel rows. One water outlet pipe is equipped with an electromagnetic control valve, and the other water outlet pipe is equipped with a manual valve.

3. The reservoir model inflow turbidity control device according to claim 1, characterized in that: An electromagnetic flow meter is connected to the turbid water conveying pipeline via a flange.

4. The reservoir model inflow turbidity control device according to claim 1, characterized in that: The bottom surfaces of both the outlet chamber and the overflow chamber are designed with a conical bottom to facilitate sewage discharge. A sewage discharge pipe is located in the middle of the conical bottom, and a sealing cap for sealing the sewage discharge pipe is located inside the conical bottom.

5. The reservoir model inflow turbidity control device according to claim 1, characterized in that: A sealing sleeve is fitted inside the round hole of the cylinder support partition, and the piston rod of the cylinder slides into the sealing sleeve.

6. The reservoir model inflow turbidity control device according to claim 1, characterized in that: The inner end face of the cylindrical seal or the frustum-shaped seal has a blind hole at its center. The piston rod is fitted into the blind hole. The outer end face of the cylindrical seal or the frustum-shaped seal has a groove at its center. The groove has a through hole in the middle that communicates with the blind hole. An internal hexagonal screw is inserted into the through hole. The outer end of the screw is inserted into a threaded hole at the center of the outer end face of the piston rod.

7. The reservoir model inflow turbidity control device according to claim 6, characterized in that: The groove is provided with an annular sealing gasket, the screw head of the hexagonal screw is pressed on the annular sealing gasket, the blind hole is provided with an annular sealing gasket, and the outer end face of the piston rod is pressed on the annular sealing gasket.

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