Large-scale hydraulic tail water level control model

Abstract

The utility model belongs to the technical field of river models, and particularly discloses a large-scale hydraulic tail water level control model which comprises a hydraulic model and a water level control assembly vertically arranged on the inner wall of the hydraulic model and used for discharging water above the working water level of the hydraulic model out of the hydraulic model. The water level control assembly comprises a water gauge which is vertically arranged on the inner wall of the hydraulic model, water level scale lines are arranged on the front face of the water gauge, and a submersible pump is arranged on the water gauge and slidably connected with the water gauge. And a water outlet of the submersible pump. A telescopic bearing column for supporting the drainage pipe is arranged below the drainage pipe; a water outlet of the drainage pipe extends out of the hydraulic model. The submersible pump is matched with the water gauge, so that non-manual control is realized, the tail water level control precision is greatly improved, and the problems of water level fluctuation caused by plate turning in a traditional method and difficulty in adjustment during small flow are solved.

Description

Technical Field

[0001] This utility model belongs to the field of river engineering model technology, and specifically relates to a large-scale hydraulic tailrace water level control model. Background Technology

[0002] River engineering models are an important tool used to simulate the changing patterns of actual water flow and to study the relationship between rivers, water flow, and sediment. Tailgate water level control is crucial in river engineering model control systems; currently, the main types of tailgates in river engineering model control systems are flap-type tailgates and sliding tailgates.

[0003] A flip-top tailgate is a fixed door panel mounted on a shaft at the bottom of the model. The tailgate is flipped by a motor-driven shaft rotation, thereby adjusting the water level at the tail of the tank. However, this type of tailgate is prone to causing water level fluctuations during the flipping process, and these fluctuations are difficult to eliminate, thus affecting the accuracy of water level control.

[0004] The sliding tailgate consists of a fixed plate and a movable plate, both of which have openings. A servo motor drives a threaded shaft on a coupling to rotate, allowing the movable plate to move left and right. This adjusts the lateral position between the movable plate and the fixed plate, changing the gap at the opening and thus regulating the tailgate's water level. However, it is difficult to guarantee precision when manufacturing sliding tailgates, leading to a tendency for leaks, and there are also difficulties in adjusting the flow rate at low levels.

[0005] Therefore, both types of tailgates in the current river engineering model control system have some problems and cannot accurately control the tailwater level. Utility Model Content

[0006] The purpose of this invention is to overcome the defects in the existing technology and provide a large-scale hydraulic tailrace water level control model.

[0007] This utility model provides a large hydraulic tailwater level control model, including a hydraulic model and a water level control component vertically installed on the inner wall of the hydraulic model, for discharging water above the working water level of the hydraulic model outside the hydraulic model.

[0008] The water level control component includes a water gauge, which is vertically installed on the inner wall of the hydraulic model. A water level scale line is provided on the front of the water gauge, and a submersible pump is installed on the water gauge. The submersible pump is slidably connected to the water gauge.

[0009] The outlet of the submersible pump is connected to a drain pipe, and a telescopic load-bearing column is provided below the drain pipe to support it.

[0010] The outlet of the drainage pipe extends to the outside of the hydraulic model.

[0011] A further embodiment is that the water gauge has a groove, and a slider is provided on the groove, with the slider slidably connected to the groove.

[0012] The slider extends outward and is provided with a receiving plate. The receiving plate has a through hole for the water inlet of the submersible pump to pass through. The submersible pump is fixedly connected to the receiving plate.

[0013] The slider is also provided with fixing bolts for fixing the slider.

[0014] A further embodiment is that the telescopic load-bearing column is a telescopic sleeve structure, with through holes and buckles on the sleeve, and the telescopic length is fixed by the cooperation of the through holes and buckles.

[0015] A further design involves providing multiple through holes spaced apart on the sleeve, with a distance of 5-10 cm between adjacent through holes.

[0016] A further embodiment is that the drain pipe is a curved pipe structure comprising a horizontal pipe and a vertical pipe; the telescopic load-bearing column is fixed below the horizontal pipe away from the water gauge.

[0017] A further embodiment is that the telescopic load-bearing column is fixed above the side wall of the hydraulic model.

[0018] A further option is to submerge the inlet of the submersible pump to a depth greater than 30% of the working water level.

[0019] A further option is to install several flow-stabilizing baffles inside the hydraulic model, with the flow-stabilizing baffles spaced apart upstream of the water gauge.

[0020] A further embodiment is that the flow stabilizing baffle has a cuboid structure with distributed tubular holes.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] (1) This utility model achieves non-manual control by combining a submersible pump with a water gauge, which greatly improves the accuracy of tailwater level control and solves the difficulties of water level fluctuation caused by the traditional method when the flap is turned and the difficulty of adjustment when the flow rate is small.

[0023] (2) The submersible pump of this utility model is slidably connected to the water gauge through a slider and a groove structure, and the position of the submersible pump can be adjusted according to the working water level, which improves the applicability of this utility model.

[0024] (3) This utility model separates the main flow from the tail flow by installing multiple flow stabilizing baffles upstream of the device, thus avoiding the main flow disturbance caused by the operation of the submersible pump. Attached Figure Description

[0025] The following figures are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0026] Figure 1 This is a schematic diagram of the installation structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the water level control component structure;

[0028] Figure 3 This is a diagram showing the connection between the submersible pump and the water gauge;

[0029] Figure 4 This is a schematic diagram of a flow stabilizing baffle structure;

[0030] Figure 5 This is a graph showing the change in water level over time during a water storage test using the device of this invention.

[0031] In the diagram: 1. Water gauge; 2. Submersible pump; 2.1. Inlet; 2.2. Outlet; 3. Drain pipe; 4. Telescopic load-bearing column; 5. Through hole; 6. Clip; 7. Flow stabilizer; 8. Slide groove; 9. Sliding block; 10. Fixing bolt; 11. Through hole. Detailed Implementation

[0032] To make the objectives, technical solutions, design methods, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0033] like Figure 1 and Figure 2 As shown, this utility model provides a large-scale hydraulic tailwater level control model, including a hydraulic model and a water level control component vertically installed on the inner wall of the hydraulic model, used to discharge water above the working water level of the hydraulic model outside the hydraulic model; wherein, the water level control component includes a water gauge 1, which is vertically installed on the inner wall of the hydraulic model, and a water level scale line is provided on the front of the water gauge 1. A submersible pump 2 is installed on the water gauge 1, and the submersible pump 2 is slidably connected to the water gauge 1; the outlet 2.2 of the submersible pump 2 is connected to a drain pipe 3, and a telescopic load-bearing column 4 is provided below the drain pipe 3 for supporting the drain pipe 3; the outlet of the drain pipe 3 extends to the outside of the hydraulic model.

[0034] like Figure 3As shown, a groove 8 is provided on the water gauge 1, and a slider 9 is provided on the groove 8. The slider 9 is slidably connected to the groove 8. A receiving plate is provided extending outward from the slider 9. A through hole 11 is provided on the receiving plate for the water inlet 2.1 of the submersible pump 2 to pass through. The submersible pump 2 is fixedly connected to the receiving plate. A fixing bolt 10 is also provided on the slider 9 for fixing the slider 9.

[0035] In this embodiment, the telescopic load-bearing column 4 is a three-layer sleeve structure. The sleeve wall of each of the three layers has a through hole 5 every 5cm. The middle layer sleeve and the inner layer sleeve are respectively provided with telescopic buckles 6. Press the buckle 6 to adjust the required height. When the holes 5 of two adjacent layers of sleeves overlap, the buckle 6 will automatically extend to fix its telescopic length.

[0036] The drain pipe 3 of this utility model has a four-section curved pipe structure. The first section is connected to the outlet 2.2 of the submersible pump 2 and is located horizontally; the second section is connected to the first section and is located vertically; the third section is connected to the second section and is located horizontally; and the fourth section is connected to the third section and is located vertically. The outlet 2.2 of the submersible pump 2 is perpendicular to the inlet 2.1. Excess water is discharged through the drain pipe 3 connected to it. The middle part of the drain pipe 3 is connected to the telescopic support column 4, which serves as a support device and fixes the height of the submersible pump 2. The telescopic support column 4 is located below the third section.

[0037] Continue to refer to Figure 1 and 4 Several flow-stabilizing baffles 7 are also installed inside the hydraulic model, and these baffles 7 are spaced apart upstream of the water gauge 1. Each flow-stabilizing baffle 7 has a cuboid structure with distributed tubular holes. The flow-stabilizing baffles 7 serve to stabilize the water flow structure within the model, preventing excessive turbulence caused by the operation of the submersible pump 2. Multiple flow-stabilizing baffles 7 can be arranged as needed to achieve better flow stabilization.

[0038] Submersible pump 2 is fixed to water level gauge 1 by means of a slider and groove. The inlet 2.1 extends vertically into the water. In order to avoid the inlet 2.1 being not submerged deep enough and causing vortices on the water surface around the inlet 2.1 to affect the water intake and thus reduce the output, based on experience, the submersion depth of the inlet 2.1 of submersible pump 2 is set not to be less than 30% of the working water level, that is, to satisfy the following formula (1):

[0039] S≥0.3×H(1)

[0040] In the formula: S is the submersible pump submersion depth, and H is the model working water level.

[0041] Before adjusting the tailrace water level, install one or more flow stabilizing baffles 7 downstream of the hydraulic model. Vertically fix a water gauge 1 and a submersible pump 2 to one side wall between the last flow stabilizing baffle 7 and the tailrace cross-section. Install the telescopic support column 4 on the horizontal plane of the other side of the hydraulic model via its base. One end of the drain pipe 3 is connected to the outlet 2.2 of the submersible pump 2, the middle part passes through the telescopic support column 4 and is supported, and the other end leads to the outside of the hydraulic model. Adjust the height of the inlet 2.1 of the submersible pump 2 relative to the water gauge 1 according to the test conditions. Simultaneously adjust the height of the telescopic support column 4 to fix the drain pipe 3. After extending to the appropriate position, lock the buckle 6. At this point, the device is fixed. The hydraulic model begins to fill with water from upstream. When the water level reaches the required level, turn on the submersible pump 2. After a period of time, the water level in the hydraulic model stabilizes at the test level, and the test can proceed normally. When the test water level changes, adjust the height of the slider 9 by fixing bolts 10, and then adjust the height of the submersible pump 2 to quickly meet the test requirements.

[0042] When this utility model device is working, the flow rate of the submersible pump 2 is not less than the working flow rate of the hydraulic model. If necessary, multiple submersible pumps 2 can be added to work simultaneously.

[0043] This utility model device has undergone multiple tests, achieving a water level accuracy of 0.05cm. The water level change over time in the main flow area during the impoundment of the hydraulic model is shown as follows: Figure 5 As shown. Compared with traditional devices, this invention significantly improves the accuracy of water level control, while avoiding water flow turbulence in the main flow area of ​​the hydraulic model caused by tailrace regulation.

[0044] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A large scale hydraulic tailwater level control model, characterized by, The water level control assembly is vertically arranged on the inner wall of the hydraulic model, and is used for discharging water above the working water level of the hydraulic model outside the hydraulic model. The water level control assembly comprises a water gauge (1) vertically arranged on the inner wall of the hydraulic model, a front surface of the water gauge (1) is provided with water level scale lines, and a submersible pump (2) is arranged on the water gauge (1) and in sliding connection with the water gauge (1). The water outlet (2.2) of the submersible pump (2) is connected with a drain pipe (3), and a telescopic load-bearing column (4) for supporting the drain pipe (3) is arranged below the drain pipe (3). The water outlet of the drain pipe (3) extends to the outside of the hydraulic model.

2. A large-scale hydraulic tailwater level control model according to claim 1, wherein A sliding groove (8) is formed in the water gauge (1), and a sliding block (9) is arranged in the sliding groove (8) and in sliding connection with the sliding groove (8). The sliding block (9) is outwardly provided with a receiving plate, the receiving plate is provided with a through hole (11) for passing through the water inlet (2.1) of the submersible pump (2), and the submersible pump (2) is fixedly connected with the receiving plate. The sliding block (9) is further provided with a fixing bolt (10) for fixing the sliding block (9).

3. A large-scale hydraulic tailwater level control model according to claim 1, wherein The telescopic load-bearing column (4) is a telescopic sleeve structure, the sleeve is provided with a through hole (5) and a buckle (6), and the telescopic length is fixed by cooperation of the through hole (5) and the buckle (6).

4. A large-scale hydraulic tailwater level control model according to claim 3, wherein A plurality of through holes (5) are arranged at intervals on the sleeve, and the distance between adjacent through holes (5) is 5-10 cm.

5. The large-scale hydraulic tailwater level control model of claim 1, wherein, The drain pipe (3) is a bent pipe structure comprising a horizontal pipe and a vertical pipe, and the telescopic load-bearing column (4) is fixed below the horizontal pipe away from the water gauge.

6. A large-scale hydraulic tailwater level control model according to claim 5, wherein The telescopic load-bearing column (4) is fixed above the side wall of the hydraulic model.

7. A large-scale hydraulic tailwater level control model according to claim 1, wherein The submersible pump (2) is arranged on the water gauge (1) and in sliding connection with the water gauge (1).

8. A large-scale hydraulic tailwater level control model according to claim 1, wherein A plurality of flow stabilizing partitions (7) are arranged in the hydraulic model, and the flow stabilizing partitions (7) are arranged at intervals upstream of the water gauge (1).

9. A large-scale hydraulic tailwater level control model according to claim 8, wherein, The flow stabilizing partitions (7) are cuboid structures and are distributed with tubular holes.

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