A large two-way water flow test platform water flow regulation device and application thereof

Abstract

The application discloses a large two-way water flow test platform water flow regulating device, which is composed of a device body, and comprises a first test area, a second test area, a steady flow mechanism, a first outflow mechanism and a pool; the pool is provided with the first test area and the second test area; one side of the pool is provided with the steady flow mechanism, and the other side of the pool is provided with the outflow mechanism; wherein: the steady flow mechanism comprises a second outflow mechanism, a rectifier box, a water stabilizing area, a water stabilizing grid and a water discharge mechanism; the rectifier box is connected with the water stabilizing area arranged on the pool through a support frame; the rectifier box is connected with the water stabilizing grid through a water stabilizing unit; the water stabilizing grid is connected with the first test area and the second test area through water supply pipelines respectively; the water discharge pipeline is connected with the water stabilizing area, and the application can regulate two-way water flow in a smaller range and ensure that the boundary conditions of a simulation area are consistent with the actual conditions.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of hydraulic engineering, and particularly relates to a water flow regulating device for a large two-way water flow test platform and application thereof. BACKGROUND

[0002] In recent years, the construction speed of pumped storage power stations in China is continuously accelerated, and most actual projects need to carry out hydraulic model tests on reservoirs and water inlets and outlets to verify whether the design meets the hydraulic design requirements, find adverse flow phenomena, optimize and propose optimal designs. Under the premise of meeting the geometric similarity, the uniformity and stability of water supply and return are very important, especially for large test platforms that can simultaneously carry out two model tests. Improper water flow regulation method can easily cause complex and variable flow patterns in the test area, cause water surface fluctuations, cause the boundary conditions of the model simulation area to be inconsistent with the actual conditions, and affect the accuracy of the test data. SUMMARY

[0003] The application provides a water flow regulating device suitable for a large two-way water flow test platform. The device can regulate two-way water flow in a small range by installing a rectifier box, a control gate, an electric valve, an electromagnetic flowmeter, and a water stabilizing grid behind the rectifier box, and can ensure that the boundary conditions of the simulation area of the application are consistent with the actual conditions during water flow regulation test.

[0004] To solve the problems in the prior art, the application is implemented by the following technical scheme:

[0005] A water flow regulating device for a large two-way water flow test platform is composed of a device body, which includes a first test area, a second test area, a flow stabilizing mechanism, a first outflow mechanism, and a water pool. The water pool is provided with the first test area and the second test area. The water pool is provided with the flow stabilizing mechanism on one side and the outflow mechanism on the other side. Wherein:

[0006] The flow stabilizing mechanism includes a second outflow mechanism, a rectifier box, a water stabilizing area, a water stabilizing grid, and a water discharge mechanism. The rectifier box is connected to the water stabilizing area provided on the water pool through a support frame. The rectifier box is connected to the water stabilizing grid through a water stabilizing unit. The water stabilizing grid is connected to the first test area and the second test area through water supply pipelines respectively. The water discharge pipeline is connected to the water stabilizing area.

[0007] Further, the first outflow mechanism is composed of an outflow condition first water supply pipeline and an outflow condition second water supply pipeline. The outflow condition first water supply pipeline and the outflow condition second water supply pipeline are provided with control gates, electromagnetic flowmeters, and electric valves.

[0008] Further, the water stabilizing area is composed of a first water outlet unit, a second water outlet unit and a third water outlet unit; the first water outlet unit, the second water outlet unit and the third water outlet unit are arranged equidistantly on the rectifying box in sequence; wherein: the first water outlet unit is composed of 48 rectangular holes with a size of 0.25m*0.03m; the second water outlet unit is composed of 64 rectangular holes with a size of 0.25m*0.05m; and the third water outlet unit is composed of 48 rectangular holes with a size of 0.25m*0.1m.

[0009] Further, the second water inflow mechanism is composed of a first water supply pipeline in an inflow condition, a second water supply pipeline in an inflow condition, a third water supply pipeline in an inflow condition and a fourth water supply pipeline in an inflow condition; the first test area is connected with the water stabilizing grid through the first water supply pipeline in an inflow condition and the second water supply pipeline in an inflow condition respectively; and the second test area is connected with the water stabilizing grid through the third water supply pipeline in an inflow condition and the fourth water supply pipeline in an inflow condition.

[0010] Further, the water discharge mechanism is composed of a first water discharge pipeline, a second water discharge pipeline, a third water discharge pipeline and a fourth water discharge pipeline; the first water discharge pipeline, the second water discharge pipeline, the third water discharge pipeline and the fourth water discharge pipeline are all connected with the water stabilizing area; and the first water discharge pipeline, the second water discharge pipeline, the third water discharge pipeline and the fourth water discharge pipeline are all provided with a control gate, an electromagnetic flowmeter and an electric valve.

[0011] The application can also be implemented by using the following technical solutions:

[0012] Application of a water flow regulating device of a large-scale bidirectional water flow test platform:

[0013] Inflow condition:

[0014] (1) the water flow in the high water tower enters the rectifying box vertically through the first water supply pipeline in an inflow condition, the second water supply pipeline in an inflow condition, the third water supply pipeline in an inflow condition and the fourth water supply pipeline in an inflow condition;

[0015] (2) after being rectified in the rectifying box, the water flow is discharged to the water pool water stabilizing area through the water outlet holes of the rectifying box;

[0016] (3) the water flow in the water pool water stabilizing area is blocked by the side wall of the water pool and flows to the first test area and the second test area;

[0017] (4) before flowing to the first test area and the second test area, the water flow still needs to pass through the secondary water stabilizing grid;

[0018] (5) after passing through the first test area and the second test area, the water flow flows out from the first water supply pipeline in an outflow condition and the second water supply pipeline in an outflow condition; wherein:

[0019] Outflow condition:

[0020] (1) the water flow in the high water tower enters the first test area and the second test area through the first water supply pipeline of outflow condition, the second water supply pipeline of outflow condition;

[0021] (2) after the water flow passes through the first test area and the second test area, the water flow is stabilized through the water stabilizing grid, flows through the flow regulating box into the pool water stabilizing area, and finally flows out from the first drain pipeline, the second drain pipeline, the third drain pipeline and the fourth drain pipeline.

[0022] Beneficial effects

[0023] The water flow regulating device of the large-scale bidirectional water flow test platform has the advantages that the bidirectional water flow is adjusted in a small range, and the adjustment effect is particularly prominent when there are two test models in the test platform. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is a three-dimensional schematic view of the water flow regulating device of the large-scale bidirectional water flow test platform;

[0025] Fig. 2 It is an opening drawing of the drain hole of the flow regulating box;

[0026] In the figure, 1 is the first water supply pipeline of inflow condition, 2 is the second water supply pipeline of inflow condition, 3 is the third water supply pipeline of inflow condition, 4 is the fourth water supply pipeline of inflow condition, 5 is the flow regulating box, 6 is the water outlet hole of the flow regulating box, 6-1 is the first water outlet unit, 6-2 is the second water outlet unit, 6-3 is the third water outlet unit, 7 is the support frame of the flow regulating box, 8 is the pool, 9 is the water stabilizing grid, 10 is the pool water stabilizing area, 11 is the first test area, 12 is the second test area, 13 is the control gate, 14 is the electromagnetic flowmeter, 15 is the electric valve, 16 is the first drain pipeline, 17 is the second drain pipeline, 18 is the third drain pipeline, 19 is the fourth drain pipeline, 20 is the first water supply pipeline of outflow condition, and 21 is the second water supply pipeline of outflow condition. DETAILED DESCRIPTION

[0027] The application will be described in detail below in combination with the drawings:

[0028] As Figs. 1-2As shown, the present application provides a large two-way water flow test platform water flow regulation device which is composed of outflow condition water supply pipeline, inflow condition water supply pipeline, rectifier box, rectifier box support frame, water pool, control gate, electric valve, electromagnetic flowmeter, water stabilizing grid and the like. Among them: the first inflow water supply pipeline 1, the second inflow water supply pipeline 2, the third inflow water supply pipeline 3, the fourth inflow water supply pipeline 4, the first outflow water supply pipeline 20 and the second outflow water supply pipeline 21 are all supplied with water by the high water tower. The four inflow water supply pipelines all vertically enter the rectifier box 5, and the tail ends are all located in the middle part of the rectifier box 5. The rectifier box 5 is a certain height away from the bottom of the water pool and is supported by the rectifier box support frame 7. A plurality of water outlets of three different sizes are opened on the side of the rectifier box 5 close to the side wall of the water pool, the water outlet close to the inflow water supply pipeline is smaller in size, and the water outlet away from the inflow water supply pipeline is larger in size. The water stabilizing grid 9 is arranged between the rectifier box 5 and the model test area, wherein the model test area includes the first test area 11 and the second test area 12. The electromagnetic flowmeter 14 and the electric valve 15 are respectively installed on the water discharge pipeline and the outflow water supply pipeline.

[0029] Inflow condition:

[0030] (1) The water flow in the high water tower vertically enters the rectifier box 5 through the first inflow water supply pipeline 1, the second inflow water supply pipeline 2, the third inflow water supply pipeline 3 and the fourth inflow water supply pipeline 4;

[0031] (2) After the water flow is rectified in the rectifier box 5, the water flow is discharged to the water pool water stabilizing area 10 through the water outlet of the rectifier box;

[0032] (3) The water flow in the water pool water stabilizing area 10 is blocked by the side wall of the water pool and flows to the first test area 11 and the second test area 12;

[0033] (4) Before the water flow flows to the first test area 11 and the second test area 12, the water flow still needs to be stabilized by the water stabilizing grid 9.

[0034] (5) After the water flow passes through the first test area 11 and the second test area 12, the water flow flows out from the first outflow water supply pipeline 20 and the second outflow water supply pipeline 21.

[0035] Outflow condition:

[0036] (1) The water flow in the high water tower enters the first test area 11 and the second test area 12 through the first outflow water supply pipeline 20 and the second outflow water supply pipeline 21;

[0037] (2) After the water flow passes through the first test area 11 and the second test area 12, the water flow is stabilized by the water stabilizing grid 9, flows through the rectifier box to the water pool water stabilizing area, and finally flows out from the first water discharge pipeline 16, the second water discharge pipeline 17, the third water discharge pipeline 18 and the fourth water discharge pipeline 19.

[0038] The application of the water flow regulation device of the large-scale bidirectional water flow test platform:

[0039] (1) When one model test is carried out (i.e. one physical model uses the left model test area 11 and the right model test area 12 at the same time):

[0040] Inflow condition, four inflow condition water supply pipelines are opened at the same time, and the water flow in the high flat water tower vertically enters the rectifier box 5 through the inflow condition first water supply pipeline 1, the inflow condition second water supply pipeline 2, the inflow condition third water supply pipeline 3 and the inflow condition fourth water supply pipeline 4. The maximum flow of each inflow condition water supply pipeline is 0.058 m3 / s, and the total flow of the inflow condition water supply pipeline is 4 x 0.058 = 0.232 m3 / s. The rectifier box 5 is 20 m long, 0.35 m wide and 0.30 m high. The first water outlet unit 6-1 is composed of 48 water outlet holes with a size of 0.25 m x 0.03 m; the second water outlet unit 6-2 is composed of 64 water outlet holes with a size of 0.25 m x 0.05 m; and the third water outlet unit 6-3 is composed of 48 water outlet holes with a size of 0.25 m x 0.1 m. The average flow velocity of the total water outlet hole outlet section is 0.11 m / s, and the water flow velocity is relatively small. The water flow enters the pool stable water area 10 from the rectifier box 5, is blocked by the pool side wall and flows to the first test area 11 and the second test area 12. Before flowing to the first test area 11 and the second test area 12, the water flow still needs to pass through the secondary stable flow of the stable water grille 9 to ensure that there is no water surface fluctuation when the water flow enters the first test area 11 and the second test area 12, so as to avoid affecting the accuracy of the test results. After passing through the first test area 11 and the second test area 12, the water flow flows out from the outflow condition first water supply pipeline 20 and the outflow condition second water supply pipeline 21.

[0041] Outflow condition, the water flow in the high flat water tower enters the left model test area 11 and the right model test area 12 through the outflow condition first water supply pipeline 20 and the outflow condition second water supply pipeline 21. The maximum flow of the outflow condition first water supply pipeline 20 is 0.058 m3 / s, and the maximum flow of the outflow condition second water supply pipeline 20 is 0.058 m3 / s. After passing through the first test area 11 and the second test area 12, the water flow reaches the stable water grille 9, flows through the stable water grille 9 after stable flow, enters the pool stable water area through the rectifier box, and finally flows out through the four water drainage pipelines located at the bottom of the pool.

[0042] (2) When two model tests are carried out at the same time (i.e. one physical model uses the left model test area 11, and the other physical model uses the right model test area 12)

[0043] Inflow condition, first close the control gate 13 in the middle of the fairing box 5, and divide the fairing box 5 into two parts. For the first test area 11, use the inflow condition first water supply pipeline 1 and the inflow condition second water supply pipeline 2 to supply water; for the second test area 12, use the inflow condition third water supply pipeline 3 and the inflow condition fourth water supply pipeline 4 to supply water. The water flow enters the first test area 11 and the second test area 12 through the fairing box 5, the pool water stabilizing area 10 and the water stabilizing grid 9 in turn. Finally, it flows out through the outflow condition first water supply pipeline 20 and the outflow condition second water supply pipeline 21 respectively.

[0044] Outflow condition, the water flow in the high water tower enters the left model test area 11 through the outflow condition first water supply pipeline 20, and flows out from the first drain pipeline 16 and the second drain pipeline 17 after being stabilized by the water stabilizing grid 9. The water flow in the high water tower enters the right model test area 12 through the outflow condition second water supply pipeline 21, and also flows out from the third drain pipeline 18 and the fourth drain pipeline 19 after being stabilized by the water stabilizing grid 9.

[0045] (3) Two physical models exist at the same time, and only the first test area is tested (i.e. only the left model test area 11 is used or only the right model test area 12 is used)

[0046] Inflow condition, first close the control gate 13 in the middle of the fairing box 5, and divide the fairing box 5 into two parts.

[0047] Use the inflow condition first water supply pipeline 1 and the inflow condition second water supply pipeline 2 to supply water, and the water flow enters the left model test area 11 through the fairing box 5, the pool water stabilizing area 10 and the water stabilizing grid 9 in turn, and finally flows out through the outflow condition first water supply pipeline 20.

[0048] Outflow condition, the water flow in the high water tower enters the first test area 11 through the outflow condition first water supply pipeline 20, and flows out from the first drain pipeline 16 and the second drain pipeline 17 after being stabilized by the water stabilizing grid 9. At this time, the third drain pipeline 18 and the fourth drain pipeline 19 are in a closed state.

Claims

1. A large two-way flow test platform flow regulation device, which is composed of a device body, characterized in that: The device comprises a first test area, a second test area, a steady flow mechanism, a first outflow mechanism and a pool; the first test area and the second test area are arranged on the pool; one side of the pool is provided with the steady flow mechanism, and the other side is provided with the outflow mechanism; wherein: The steady flow mechanism is composed of a second outflow mechanism, a rectifier box, a water stabilization area, a water stabilization grid and a drainage mechanism; the rectifier box is connected with the water stabilization area arranged on the pool through a support frame; the rectifier box is connected with the water stabilization grid through a water stabilization unit; the water stabilization grid is connected with the first test area and the second test area through water supply pipelines respectively; the drainage mechanism is connected with the water stabilization area; The first outflow mechanism is composed of an outflow condition first water supply pipeline and an outflow condition second water supply pipeline; the outflow condition first water supply pipeline and the outflow condition second water supply pipeline are both provided with a control gate, an electromagnetic flowmeter and an electric valve; The water stabilization area is composed of a first water outlet unit, a second water outlet unit and a third water outlet unit; the first water outlet unit, the second water outlet unit and the third water outlet unit are arranged equidistantly on the rectifier box in sequence; wherein: the first water outlet unit is composed of 48 0.25m×0.03m rectangular holes; the second water outlet unit is composed of 64 0.25m×0.05m rectangular holes; the third water outlet unit is composed of 48 0.25m×0.1m rectangular holes.

2. The water flow regulating device of a large-scale bidirectional water flow test platform according to claim 1, characterized in that: The second outflow mechanism is composed of an inflow condition first water supply pipeline, an inflow condition second water supply pipeline, an inflow condition third water supply pipeline and an inflow condition fourth water supply pipeline; the first test area is connected with the water stabilization grid through the inflow condition first water supply pipeline and the inflow condition second water supply pipeline respectively; the second test area is connected with the water stabilization grid through the inflow condition third water supply pipeline and the inflow condition fourth water supply pipeline.

3. The water flow regulating device of a large-scale bidirectional water flow test platform according to claim 1, characterized in that: The drainage mechanism is composed of a first drainage pipeline, a second drainage pipeline, a third drainage pipeline and a fourth drainage pipeline; the first drainage pipeline, the second drainage pipeline, the third drainage pipeline and the fourth drainage pipeline are all connected with the water stabilization area; the first drainage pipeline, the second drainage pipeline, the third drainage pipeline and the fourth drainage pipeline are all provided with a control gate, an electromagnetic flowmeter and an electric valve.

4. Application of the water flow regulation device of the large-scale bidirectional water flow test platform according to claim 1, characterized in that: Inflow condition: (1) the water flow in the high water tower vertically enters the rectifier box through the inflow condition first water supply pipeline, the inflow condition second water supply pipeline, the inflow condition third water supply pipeline and the inflow condition fourth water supply pipeline; (2) after being rectified in the rectifier box, the water flow is discharged to the pool water stabilization area through the water outlet holes of the rectifier box; (3) the water flow in the pool water stabilization area is blocked by the pool side wall and flows to the first test area and the second test area; (4) before flowing to the first test area and the second test area, the water flow still needs to be stabilized by the water stabilization grid for the second time; (5) after passing through the first test area and the second test area, the water flow flows out from the outflow condition first water supply pipeline and the outflow condition second water supply pipeline; wherein: Outflow condition: (1) The water flow in the high water tower enters the first test area and the second test area through the first water supply pipeline in the outflow condition and the second water supply pipeline in the outflow condition; (2) After the water flow passes through the first test area and the second test area, the water flow is stabilized through the water stabilizing grid, flows through the flow straightening box into the pool water stabilization area, and finally flows out from the first drain pipeline, the second drain pipeline, the third drain pipeline and the fourth drain pipeline.

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