Simulation model for testing hydropower station gate flowing water taking safety and experimental method

Abstract

The invention relates to the technical field of reservoir stratified water taking, in particular to a simulation model and an experiment method for testing hydropower station gate flowing water taking safety, and the simulation model comprises a reservoir area which is enclosed by hillstone, is used for simulating a real reservoir, and is provided with a gate and a drain grating groove; the dynamic water opening and closing hydraulic safety simulation system comprises a water taking unit and an evaluation unit, the water taking unit is used for discharging water in a reservoir area from a gate and is used for simulating a real reservoir flowing water taking scene; the evaluation unit is used for analyzing the operation safety according to different elevation water levels and water flow fluctuations in the reservoir area when the flowing water is taken; according to the method, flowing water flow velocity data of water layers with different heights are obtained through the model, the risk of opening and closing of flowing water with different elevations is obtained through fluid simulation analysis of model experiment data, feasibility verification is provided for real reservoir stoplog gate flowing water opening and closing operation, the risk caused by stoplog gate flowing water opening and closing is effectively avoided, and operation safety is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of reservoir stratified water intake, and in particular to a simulation model and an experimental method for testing the safety of dynamic water intake of a hydropower station gate. Background Art

[0002] For large hydropower station reservoirs, the water temperature has a distinct stratified distribution along the depth. The low-temperature water discharged from the power station will affect the ecological environment of the downstream river section. The low temperature water will affect the spawning and growth of aquatic organisms such as fish, reptiles, and amphibians, and may even lead to the extinction of species.

[0003] The stratified water intake method can selectively draw water from different layers of the reservoir, which can reduce the negative impact of hydropower station discharge on downstream organisms and the water environment. Therefore, hydropower stations are gradually promoting stratified water intake during power generation. The stoplog gates of hydropower stations are the easiest to operate for stratified water intake, and the use of stoplog gates for stratified water intake can significantly increase local economic benefits.

[0004] However, the operation of stoplog gates generally requires opening and closing with static water. Large hydropower stations have a huge number of stoplog gates. The opening and closing of the gates takes a long time and requires the corresponding units to be shut down. The operation flexibility is poor, which greatly affects the power generation efficiency of the power station itself. Therefore, exploring the feasibility of the dynamic water opening and closing operation of the stoplog gates in hydropower stations, and on this basis, conducting research on measures to improve the operating efficiency of the stoplog gate operation mode, is of great practical significance for improving the power generation efficiency of hydropower stations. Summary of the Invention

[0005] In view of the problems existing in the above-mentioned existing simulation models and experimental methods for testing the dynamic water intake safety of hydropower station gates, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a simulation model and experimental method for testing the safety of dynamic water intake of a hydropower station gate.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a simulation model for testing the safety of dynamic water intake at a hydropower station gate, comprising:

[0008] The reservoir area simulates a real reservoir with gates and trash screen slots;

[0009] Dynamic water opening and closing hydraulic safety simulation system, including water intake unit and evaluation unit;

[0010] The water intake unit discharges the water injected into the reservoir from the gate to simulate a real reservoir dynamic water intake scenario;

[0011] The evaluation unit analyzes the safety of the operation based on the different water levels and water flow fluctuations in the reservoir during dynamic water intake.

[0012] As a preferred solution of the simulation model for testing the dynamic water intake safety of a hydropower station gate according to the present invention, wherein: the water intake unit includes a water storage tank and a pipeline assembly;

[0013] The pipeline assembly connects the water tank with the reservoir area, and inputs the water source in the water tank into the reservoir area, so that the water source in the reservoir area is pumped out from the gate slot, simulating the water flow fluctuation of real reservoir water intake.

[0014] As a preferred solution of the simulation model for testing the dynamic water intake safety of a hydropower station gate according to the present invention, the pipeline assembly includes a water supply pipe, a water outlet pipe and an overflow pipe;

[0015] The water supply pipe transports the water in the water storage tank to the reservoir area, ensuring that the flow rate in the reservoir area is always at the set elevation;

[0016] The outlet pipe introduces the water discharged from the gate into the water storage tank to simulate the water intake action;

[0017] The overflow pipe is used to transport water in the reservoir area that exceeds the set water volume back to the water storage tank.

[0018] As a preferred solution of the simulation model for testing the safety of dynamic water intake of a hydropower station gate according to the present invention, wherein: the evaluation unit includes a water data monitoring module and a safety analysis module;

[0019] The water data monitoring module is used to monitor the water flow data in the reservoir area during dynamic water intake;

[0020] The safety analysis module performs safety analysis based on the monitored water flow data.

[0021] As a preferred solution of the simulation model for testing the dynamic water intake safety of a hydropower station gate according to the present invention, the water flow data includes water level, water pressure and flow velocity of water at different elevations.

[0022] As a preferred solution of the simulation model for testing the dynamic water intake safety of the hydropower station gate described in the present invention, the water data monitoring module is installed in the trash grille slot to monitor the water flow rate data at different elevations in the gate during dynamic water intake.

[0023] As a preferred solution of the simulation model for testing the dynamic water intake safety of the hydropower station gate described in the present invention, the water data monitoring module also includes a liquid level meter and a water pressure sensor for monitoring the interior of the reservoir area.

[0024] As a preferred solution of the simulation model for testing the safety of dynamic water intake of a hydropower station gate according to the present invention, wherein: the safety analysis module includes a data receiving module and a calculation module;

[0025] The data receiving module is used to receive the water flow data monitored by the water data monitoring module;

[0026] The computing module performs fluid simulation analysis on the water flow data to come up with the best operation plan.

[0027] As a preferred solution of the simulation model for testing the dynamic water intake safety of the hydropower station gate described in the present invention, it also includes a flow stabilizing wall, which is arranged in the reservoir area to reduce the water flow impact generated during water supply.

[0028] An experimental method for testing the safety of dynamic water intake at a hydropower station gate is applied to the above-mentioned simulation model for testing the safety of dynamic water intake at a hydropower station gate. The specific steps of the experimental method are as follows:

[0029] Transport the water in the water tank to the reservoir area through the water supply pipe to reach the required water volume for testing;

[0030] The water in the reservoir is discharged from the gate through the outlet pipe;

[0031] The water data monitoring module monitors the liquid level, water pressure and flow velocity fluctuations at different gate elevations within the reservoir area;

[0032] Fluid simulation is used to analyze water flow data and obtain the best operating plan.

[0033] The beneficial effects of the present invention are as follows: the present invention uses a model to obtain dynamic water velocity data of water layers at different heights. The model experimental data is analyzed through fluid simulation to obtain the risks of dynamic water opening and closing at different elevations, providing feasibility verification for the dynamic water opening and closing operation of the stoplog gates in real reservoirs, effectively avoiding the risks brought by the dynamic water opening and closing of the stoplog gates, and ensuring the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0035] Figure 1 This is a schematic diagram of the top view of the simulation model for testing the dynamic water intake safety of a hydropower station gate according to the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of the dynamic water opening and closing hydraulic safety simulation system in the simulation model for testing the dynamic water intake safety of the hydropower station gate in the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of the pipeline components in the simulation model for testing the dynamic water intake safety of the hydropower station gate according to the present invention;

[0038] Figure 4 This is a structural diagram of the water data monitoring module in the simulation model for testing the dynamic water intake safety of the hydropower station gate in the present invention. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0041] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0042] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0043] Example 1

[0044] Reference Figure 1-4 , provides a simulation model for testing the dynamic water intake safety of hydropower station gates, including:

[0045] Reservoir area 1, enclosed by rocks, is used to simulate a real reservoir and has a gate 11 and a trash screen slot 12;

[0046] Dynamic water opening and closing hydraulic safety simulation system 2, including a water intake unit 21 and an evaluation unit 22;

[0047] The water intake unit 21 discharges the water injected into the reservoir area 1 from the gate 11, which is used to simulate the real reservoir dynamic water intake scene;

[0048] The evaluation unit 22 analyzes the safety of the operation based on the different water levels and water flow fluctuations in the reservoir area 1 during dynamic water intake.

[0049] The model was used to simulate the dynamic water intake scenario of a real reservoir, and the water flow fluctuations at 11 gates at different elevations during the water intake process were analyzed. The risks of opening and closing dynamic water intake at different elevations were obtained, providing feasibility verification for the dynamic water opening and closing operations of the stoplog gates in real reservoirs, effectively avoiding the risks brought about by the dynamic water opening and closing of the stoplog gates and ensuring the safety of the operation.

[0050] The water intake unit 21 includes a water storage tank 211 and a pipeline assembly 212;

[0051] The pipe assembly 212 connects the water tank 211 with the reservoir area 1, and inputs the water source in the water tank 211 into the reservoir area 1, so that the water source in the reservoir area 1 is pumped out from the gate slot 11, simulating the water flow fluctuation of real reservoir water intake.

[0052] The pipe assembly 212 includes a water supply pipe 2121, a water outlet pipe 2122 and an overflow pipe 2123;

[0053] The water supply pipe 2121 delivers the water in the water storage tank 211 to the reservoir area 1, ensuring that the flow rate in the reservoir area 1 is always at the set elevation;

[0054] The water outlet pipe 2122 introduces the water discharged from the gate 11 into the water storage tank 211, simulating the water intake action;

[0055] The overflow pipe 2123 is used to transport the water source in the reservoir area 1 that exceeds the set water volume back to the water storage tank 211.

[0056] Specifically, a water pump 2124, a first valve 2125, and a first flow meter 2126 are installed on the water supply pipe 2121. The water pump 2124 pumps water from the water storage tank 211, and the pumped water is transported to the end of the reservoir area 1 through the water supply pipe 2121.

[0057] A second valve 2127 and a second flow meter 2128 are installed on the outlet pipe 2122. During testing, the second valve 2127 is opened, and water in the reservoir area 1 flows out from the gate 11 and is transported to the water storage tank 211 through the outlet pipe 2122. The second flow meter 2128 is used to display the water discharge volume, which facilitates adjusting the flow rate required for the test by adjusting the opening and closing degree of the second valve 2127.

[0058] A third valve 2129 is installed on the overflow pipe 2123. The excess water in the reservoir area 1 will return to the water storage tank 211 through the overflow pipe 2123 to ensure that the water level inside the reservoir area 1 is in a constant state.

[0059] This structure improves the accuracy of subsequent tests by simulating real reservoir water intake scenarios.

[0060] The evaluation unit 22 includes a water data monitoring module 221 and a safety analysis module;

[0061] The water data monitoring module 221 is used to monitor the water flow data in the reservoir area 1 during dynamic water intake;

[0062] The safety analysis module performs safety analysis based on the monitored water flow data.

[0063] Water flow data includes water level, water pressure, and flow rate at different elevations.

[0064] The water data monitoring module 221 is installed in the trash grille slot 12 and is used to monitor the water flow rate data at different elevations in the gate 11 during dynamic water intake.

[0065] The water data monitoring module 221 also includes a liquid level gauge and a water pressure sensor for monitoring the interior of the reservoir area 1 .

[0066] Specifically, a liquid level gauge and a water pressure sensor are installed in the reservoir area 1 to monitor the water level and water pressure of the reservoir area 1;

[0067] The water data monitoring module 221 includes a frame 2211, in which a mounting plate 2212 is vertically movable. Three sets of flow rate testers 2213 are installed on the mounting plate 2212, and the mounting plate 2212 is vertically movable in the frame 2211 through a lifting member, thereby driving the three sets of flow rate testers 2213 to move vertically synchronously. During the test, the water in the reservoir area 1 is discharged from the gate 11, and the water flow during discharge drives the flow rate tester 2213 to realize flow rate measurement. At the same time, the lifting member is used to control the vertical displacement of the mounting plate 2212 in the frame 2211, so that the flow rate tester 2213 is at different water level heights, thereby realizing the dynamic water flow rate measurement at different elevations.

[0068] The security analysis module includes a data receiving module and a calculation module;

[0069] The data receiving module is used to receive the water flow data monitored by the water data monitoring module;

[0070] The computing module performs fluid simulation analysis on the water flow data to come up with the best operation plan.

[0071] The model is used to obtain dynamic water flow rate data for water layers at different heights. The model experimental data is analyzed through fluid simulation to obtain the risks of dynamic water opening and closing at different elevations, providing feasibility verification for the dynamic water opening and closing operations of the stoplog gates in real reservoirs, effectively avoiding the risks brought by the dynamic water opening and closing of the stoplog gates and ensuring the safety of the operation.

[0072] Example 2

[0073] Reference Figure 1 This embodiment is different from the first embodiment in that it further includes a flow stabilizing wall 3, which is arranged in the reservoir area 1 to reduce the water flow impact generated during water supply;

[0074] Specifically, the flow stabilizing wall 3 adopts an energy dissipation plate, and the surface of the energy dissipation plate is evenly spaced with small honeycomb-shaped holes. After the water entering from the water supply pipe 2121 enters the energy dissipation pool, it will eliminate the kinetic energy of the impact through the small holes on the surface of the energy dissipation plate, and then turn into a gentle water flow into the reservoir area 1, reducing the impact on the water in the reservoir area 1, and thus reducing the turbulence of the water stored in the reservoir area 1, ensuring that during the simulated water intake, the water stored in the reservoir area 1 will not affect the data monitoring during the water intake due to turbulence, thereby improving the overall water flow test effect and making the analysis structure more realistic.

[0075] The rest of the structure is the same as that of Example 1.

[0076] Example 3

[0077] Reference Figure 2 This embodiment differs from the above embodiment in that it discloses an experimental method for testing the safety of dynamic water intake of a hydropower station gate, which is applied to the above-mentioned simulation model for testing the safety of dynamic water intake of a hydropower station gate. The specific steps of the experimental method are as follows:

[0078] The water in the water storage tank 211 is transported to the reservoir area 1 through the water supply pipe 2121 to reach the required water volume for testing;

[0079] Specifically, by turning on the water pump 2124, the water in the water tank 211 is injected into the reservoir area 1 through the water supply pipe 2121, simulating the actual reservoir water storage capacity. When the water in the reservoir area 1 is too much, the water will return to the water tank 211 through the overflow pipe 2123, ensuring that the water storage in the reservoir area 1 is in a constant state.

[0080] The water in the reservoir area 1 is discharged from the gate 11 through the outlet pipe 2122;

[0081] During the test, the second valve 2127 on the outlet pipe 2122 is opened, and the water in the reservoir area 1 is discharged from the gate 11 and enters the water storage tank 211 through the outlet pipe 2122, which is used to simulate a real water intake scenario. The second flow meter 2128 is used to display the water discharge volume, which facilitates adjusting the flow rate required for the test by adjusting the opening and closing degree of the second valve 2127;

[0082] The water data monitoring module 221 monitors the liquid level, water pressure and flow velocity fluctuations at different elevations of the gate 11 in the reservoir area 1;

[0083] Specifically, the liquid level and water pressure are monitored by a liquid level gauge and a water pressure sensor. During the test, the water in the reservoir area 1 is discharged from the gate 11. The water flow during discharge drives the flow velocity tester 2213 to achieve flow velocity measurement. At the same time, the vertical displacement of the mounting plate 2212 in the frame 2211 is controlled by a lifting member, so that the flow velocity tester 2213 is at different water levels, thereby achieving dynamic water flow velocity measurement at different elevations. The test data of the flow velocity fluctuation at low levels of water in the gate 11 at different flow rates is used to simulate the water data when taking water from a real reservoir.

[0084] Fluid simulation is used to analyze water flow data and obtain the best operating plan.

[0085] Specifically, the water data is stored and converted into graphics and table files and stored in the computer. The graphics and data table files are compared with the dynamic water opening and closing simulation calculation results of the computer CFD software to obtain highly similar results, which can determine the feasibility of the model experiment and improve the power generation efficiency of the hydropower station. At the same time, it can also make a feasibility analysis for starting the beam gate under the dynamic water working condition of the hydropower station, thereby improving the economic benefits of the hydropower station for more power generation.

[0086] The rest of the structure is the same as that of Example 2.

[0087] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structures. Other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0088] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0089] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0090] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A simulation model for testing the safety of dynamic water intake at a hydropower station gate, characterized by: include: The reservoir area (1) simulates a real reservoir and has a gate (11) and a trash screen slot (12); A dynamic water opening and closing hydraulic safety simulation system (2), comprising a water intake unit (21) and an evaluation unit (22); The water intake unit (21) discharges the water injected into the reservoir area (1) from the gate (11) to simulate a real reservoir dynamic water intake scene; The evaluation unit (22) analyzes the safety of the operation based on the different water levels and water flow fluctuations in the reservoir area (1) during dynamic water intake.

2. The simulation model for testing the safety of dynamic water intake at a hydropower station gate according to claim 1, characterized in that: The water intake unit (21) comprises a water storage tank (211) and a pipeline assembly (212); The pipe assembly (212) connects the water storage tank (211) with the reservoir area (1), and inputs the water source in the water storage tank (211) into the reservoir area (1), so that the water source in the reservoir area (1) is pumped out from the gate groove (11), simulating the water flow fluctuation of water intake in a real reservoir.

3. The simulation model for testing the dynamic water intake safety of a hydropower station gate according to claim 2, characterized in that: The pipeline assembly (212) includes a water supply pipe (2121), a water outlet pipe (2122), and an overflow pipe (2123); The water supply pipe (2121) transports the water source in the water storage tank (211) to the reservoir area (1), ensuring that the flow rate in the reservoir area (1) is always at a set elevation; The water outlet pipe (2122) introduces the water discharged from the gate (11) into the water storage tank (211), simulating the water intake action; The overflow pipe (2123) is used to transport the water source in the reservoir area (1) that exceeds the set water volume back to the water storage tank (211).

4. The simulation model for testing the safety of dynamic water intake at a hydropower station gate according to claim 3, characterized in that: The evaluation unit (22) includes a water data monitoring module (221) and a safety analysis module; The water data monitoring module (221) is used to monitor water flow data in the reservoir area (1) during dynamic water intake; The safety analysis module performs safety analysis based on the monitored water flow data.

5. The simulation model for testing the safety of dynamic water intake at a hydropower station gate according to claim 4, characterized in that: The water flow data includes water level, water pressure and flow rate of water at different elevations.

6. The simulation model for testing the safety of dynamic water intake at a hydropower station gate according to claim 5, characterized in that: The water data monitoring module (221) is installed in the trash grille slot (12) and is used to monitor water flow velocity data at different elevations in the gate (11) during dynamic water intake.

7. The simulation model for testing the safety of dynamic water intake at a hydropower station gate according to claim 6, characterized in that: The water data monitoring module (221) also includes a liquid level meter and a water pressure sensor for monitoring the interior of the reservoir area (1).

8. The simulation model for testing the safety of dynamic water intake at a hydropower station gate according to claim 7, characterized in that: The security analysis module includes a data receiving module and a calculation module; The data receiving module is used to receive the water flow data monitored by the water data monitoring module; The computing module performs fluid simulation analysis on the water flow data to come up with the best operation plan.

9. The simulation model for testing the safety of dynamic water intake at a hydropower station gate according to claim 1, characterized in that: It also includes a flow stabilizing wall (3), which is arranged in the reservoir area (1) and is used to reduce water flow impact generated during water supply.

10. An experimental method for testing the safety of dynamic water intake at a hydropower station gate, characterized by: The specific steps of the experimental method for the simulation model for testing the dynamic water intake safety of a hydropower station gate as described in any one of claims 1 to 9 are as follows: The water in the water storage tank (211) is transported to the reservoir area (1) through the water supply pipe (2121) to reach the required water volume for testing; The water in the reservoir (1) is discharged from the gate (11) through the outlet pipe (2122); The liquid level, water pressure and flow velocity fluctuations at different elevations of the gate (11) in the reservoir area (1) are monitored by a water data monitoring module (221); Fluid simulation is used to analyze water flow data and obtain the best operating plan.

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