System for measuring turbulent fluctuation intensity of sediment-carrying water flow

Abstract

The utility model discloses a system for measuring turbulent fluctuation intensity of sediment carrying water flow. The system comprises a muddy water stirring pool, a sediment content measurer, an open channel water tank, a movable measuring bridge, a water flow pulsating pressure sensor and a signal testing and analyzing unit, the muddy water stirring pool is located on one side of the open channel water tank, the front area and the tail area of the open channel water tank are communicated with the muddy water stirring pool through a muddy water inlet pipe and a muddy water outlet pipe respectively, the sand content measurer is arranged in the muddy water stirring pool and the open channel water tank, and the movable measuring bridge horizontally moves in the direction where the open channel water tank is located. A vertical threaded connecting rod is arranged on the movable testing bridge, a water flow pulsation pressure sensor in wired connection with a pressure transmitter is fixedly installed at the lower end of the vertical threaded connecting rod, and the pressure transmitter is in wireless transmission connection with a signal testing and analyzing unit. According to the utility model, the technical defect of lack of a model for measuring the turbulence intensity of the sediment-carrying water flow under the environment of high-content sediment and ultra-fine-particle sediment in research on the turbulence intensity distribution rule of the sediment-carrying water flow is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy sand-laden water flow turbulence research, in particular to a sand-laden water flow turbulence intensity measurement system. Background Art

[0002] The turbulence intensity of sediment-laden water flows refers to the phenomenon in which sediment particles in a water flow are suspended due to turbulent flow and simultaneously sink due to gravity. Sediment particles in sediment-laden water flows affect the turbulence of the water flow, and conversely, the turbulence of the water flow also affects the distribution of sediment particles. These interactions are mutually reinforcing. The turbulence intensity of sediment-laden water flows not only affects the movement of sediment but also has important implications for the design and implementation of water conservancy projects. By studying the turbulence intensity of sediment-laden water flows, we can better understand the movement of sediment in water bodies and apply the research results to actual water conservancy projects to improve the effectiveness and safety of the projects. Existing technical methods for studying the distribution of turbulence intensity in sediment-laden water flows lack a research model suitable for measuring the turbulence intensity of sediment-laden water flows in environments with high sand content and extremely fine sediment particles.

[0003] To this end, we designed a sand-laden water flow turbulence intensity measurement system to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the technical defects of the existing technical means for studying the turbulence intensity distribution law of sand-laden water flow, which is the lack of a research model suitable for measuring the turbulence intensity of sand-laden water flow in a high sand content and extremely fine sediment environment, and to propose a turbulence intensity measurement system for sand-laden water flow.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A system for measuring the turbulence intensity of a sediment-laden water flow, comprising a muddy water stirring tank, a sediment content measuring device, an open channel flume, a mobile measuring bridge, a water flow pulsation pressure sensor, and a signal testing and analysis unit;

[0007] The turbid water stirring tank is located on one side of the open channel water tank. The front area and the tail area of the open channel water tank are connected to the turbid water stirring tank through the turbid water inlet pipe and the turbid water outlet pipe respectively. The sediment content meter is arranged in the turbid water stirring tank and the front and tail tank bodies of the open channel water tank. The movable measuring bridge is arranged above the open channel water tank and moves horizontally along the direction of the open channel water tank. A vertical threaded connecting rod is provided on the movable measuring bridge. The water flow pulsation pressure sensor is fixedly installed at the lower end of the vertical threaded connecting rod. The water flow pulsation pressure sensor is wired to the pressure transmitter, and the pressure transmitter is connected to the signal testing and analysis unit by wireless transmission.

[0008] Preferably, a plurality of water level gauges are arranged at equal intervals on the inner wall of the open channel water tank, and the water level gauges are connected to a signal receiver via wireless communication, and the signal receiver establishes a wired connection with the data acquisition unit.

[0009] Preferably, a temperature sensor is fixedly provided on the inner side wall of the middle part of the open channel water tank body, and the temperature sensor establishes a wired connection with the data acquisition unit through the signal receiver.

[0010] Preferably, a water stabilizing grid is provided in the front area of the open channel water tank, and the water stabilizing grid divides the front area of the open channel water tank into a front pool, and the front pool is connected to one end of the muddy water inlet pipe.

[0011] Preferably, a tail gate for controlling the runoff is provided at the tail end of the open channel water tank, and the tail gate establishes a control connection with a central control room arranged beside the open channel water tank.

[0012] Preferably, the movable measuring bridge includes a horizontal threaded connecting rod, a vertical threaded connecting rod, a rotating handle and a rotating screw. The horizontal threaded connecting rod is threadedly connected to a movable platform, the vertical threaded connecting rod is threadedly connected to a side body of the movable platform, and the rotating screw is inserted into the upper end of the vertical threaded connecting rod; bearing bases are provided at both ends of the horizontal threaded connecting rod, and the bearing base is installed on the bridge frame, one end of the horizontal threaded connecting rod passes through the bearing base and is fixedly connected to the rotating handle, and limiting rods are symmetrically provided on both sides of the horizontal threaded connecting rod, the limiting rods pass through the platform body of the movable platform, and the two ends thereof are fixed on the bridge frame.

[0013] Preferably, a roller is provided at the lower portion of the movable measuring bridge, the roller is rotatably mounted at the lower portion of the bridge frame, and is rollingly arranged on a water trough track, and the water trough track is mounted on the upper end surface of the open channel water trough.

[0014] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention adjusts the sediment content in the muddy water by setting a device in front of the open channel flume, and with the help of the sediment content measuring device, the muddy water reaches the water environment with high sediment content and extremely fine sediment particles required for the research. This configuration method can flexibly mix various water bodies with high sediment content and extremely fine sediment particles according to the research needs, greatly improving the breadth of research on the turbulence intensity of sediment-laden water flows; by setting a mobile measuring bridge on the open channel flume, the water flow pulsation pressure sensor can be flexibly moved to various positions in the water body, improving the flexibility of adjusting the position required for the research on the turbulence intensity of sediment-laden water flows. The sediment-laden water flow turbulence intensity measurement system of the present invention fills the technical defect of the research on the turbulence intensity distribution law of sediment-laden water flows, which lacks a sediment-laden water flow turbulence intensity measurement model suitable for high sediment content and extremely fine sediment particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the arrangement of a system for measuring the turbulence intensity of a sediment-laden water flow proposed in the present invention;

[0016] Figure 2 This is a cross-sectional schematic diagram of an open channel flume of a sediment-laden water flow turbulence intensity measurement system proposed in the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of a mobile measuring bridge of a sediment-laden water flow turbulence intensity measurement system proposed by the utility model.

[0018] The numbers in the figure are: 1. Muddy water mixing tank; 2. Sediment content measuring device; 3. Central control room; 4. Muddy water inlet pipe; 5. Forebay; 6. Water stabilizing screen; 7. Tail gate; 8. Muddy water outlet pipe; 9. Open channel flume; 10. Mobile measuring bridge; 11. Temperature sensor; 12. Flume track; 13. Roller; 131. Bridge; 132. Bearing base; 14. Horizontal threaded connecting rod; 141. Limit rod; 15. Vertical threaded connecting rod; 151. Moving platform; 16. Rotating handle; 17. Rotating screw; 18. Water level gauge; 19. Signal receiver; 20. Data acquisition unit; 21. Water flow pulsation pressure sensor; 22. Pressure transmitter; 23. Signal test and analysis unit. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] A system for measuring the turbulence intensity of a sediment-laden water flow comprises a muddy water stirring tank 1, a sediment content measuring device 2, an open channel flume 9, a movable measuring bridge 10, a water flow pulsation pressure sensor 21, and a signal testing and analyzing unit 23.

[0021] For the layout of each device in the measurement system, please refer to Figure 1 and Figure 2 The muddy water stirring tank 1 is located on one side of the open channel water tank 9. The front area of the open channel water tank 9 is connected to the muddy water stirring tank 1 through the muddy water inlet pipe 4, and the tail area of the open channel water tank 9 is connected to the muddy water stirring tank 1 through the muddy water outlet pipe 8, so that a water flow loop is formed between the open channel water tank 9 and the muddy water stirring tank 1. After the measurement is completed, the experimental sand-containing water in the open channel water tank 9 can also be returned to the muddy water stirring tank 1, saving resources.

[0022] A sediment content measuring device 2 for measuring the sediment content in the water body is arranged in the muddy water stirring tank 1 . In addition, sediment content measuring devices 2 are also arranged in the front and rear tank bodies of the open channel water tank 9 .

[0023] The mobile measuring bridge 10 is arranged above the open channel water tank 9 and can move horizontally along the direction of the open channel water tank 9. The mobile measuring bridge 10 is provided with a vertical threaded connecting rod 15 whose shell can be raised and lowered. A water flow pulsation pressure sensor 21 for measuring the turbulence intensity of the sand-laden water flow is fixedly installed at the lower end of the vertical threaded connecting rod 15. In order to improve the transmission capacity of signal data, the water flow pulsation pressure sensor 21 is connected to the pressure transmitter 22, and the connection is made by wired connection, which effectively avoids the disadvantage of water body interfering with wireless signal transmission. The pressure transmitter 22 is arranged above the water surface, and the pressure transmitter 22 is connected to the signal test and analysis unit 23 by wireless transmission. After receiving the data signal collected by the water flow pulsation pressure sensor 21, the signal test and analysis unit 23 performs analysis and processing.

[0024] In addition, to facilitate control of experimental conditions, several water level gauges 18 were installed at equal intervals on the inner wall of the open channel flume 9. A tailgate 7 for controlling runoff was installed at the tail end of the open channel flume 9. This tailgate 7 established a control connection with a central control room 3 located next to the open channel flume 9. The water level gauges 18 were wirelessly connected to a signal receiver 19, which in turn established a wired connection with a data acquisition unit 20. The data acquisition unit 20 received the measurement data from the water level gauges 18 and transmitted it to the central control room 3. Based on the measurement data from the water level gauges 18 and the requirements of the experimental measurements, the central control room 3 adjusted the opening and closing angle of the tailgate 7 and the inflow rate of the muddy water inlet pipe 4.

[0025] In order to collect more comprehensive experimental data, a temperature sensor 11 for measuring water temperature is fixedly installed on the inner wall of the middle part of the open channel water tank 9. The temperature sensor 11 can establish a wired connection with the data acquisition unit 20 through the signal receiver 19 and transmit the collected water temperature data to the central control room 3.

[0026] In order to facilitate the control of the water state in the open channel water tank 9, a water stabilizing grille 6 is provided in the front area of the open channel water tank 9. The water stabilizing grille 6 divides the front area of the open channel water tank 9 into a front pool 5. The front pool 5 is connected to one end of the muddy water inlet pipe 4. The high-pressure water injected into the open channel water tank 9 by the muddy water inlet pipe 4 becomes stable and controllable after being processed by the front pool 5 and the water stabilizing grille 6.

[0027] It is worth mentioning that in order to flexibly adjust the position of the water flow pulsation pressure sensor 21 in the water body, this embodiment provides a mobile measuring bridge 10 that can conveniently adjust the position of the water flow pulsation pressure sensor 21. Figure 3As shown, the movable measuring bridge 10 includes a horizontal threaded connecting rod 14, a vertical threaded connecting rod 15, a rotating handle 16 and a rotating screw 17. The horizontal threaded connecting rod 14 is threadedly connected to a movable platform 151. The vertical threaded connecting rod 15 is threadedly connected to one side of the movable platform 151, and a rotating screw 17 is inserted into the upper end of the vertical threaded connecting rod 15; bearing bases 132 are provided at both ends of the horizontal threaded connecting rod 14, and the bearing base 132 is installed on the bridge frame 131. One end of the horizontal threaded connecting rod 14 passes through the bearing base 132 and is fixedly connected to the rotating handle 16. Limit rods 141 are symmetrically provided on both sides of the horizontal threaded connecting rod 14. The limit rods 141 pass through the platform of the movable platform 151, and both ends thereof are fixed on the bridge frame 131.

[0028] The lower part of the movable measuring bridge 10 is provided with a roller 13 , which is rotatably mounted on the lower part of the bridge frame 131 and rollingly arranged on the water tank track 12 , which is mounted on the upper end surface of the open channel water tank 9 .

[0029] According to the measurement research requirements of the turbulence intensity of the sediment-laden water flow, sediment solids and impurity-free water are put into the muddy water mixing tank 1. After being mixed and stirred evenly, muddy water with high sand content and very fine sediment particles is formed. The muddy water in the muddy water mixing tank 1 is measured by the sediment content meter 2 to determine whether it meets the experimental research requirements. If not, the proportion of water or sandy solids is adjusted according to the measurement results. If it meets the experimental research requirements, the muddy water inlet pipe 4 is opened to inject into the open channel flume 9, and after being buffered by the forebay 5 and the water stabilizing grid 6, it enters the test section of the open channel flume 9. The horizontal position of the open channel flume 9 where the water flow pulsation pressure sensor 21 is located is adjusted by pushing the mobile measuring bridge 10 ( Figure 1 and Figure 2 In the direction of the x-axis), when the position to be measured is reached, the horizontal threaded connecting rod 14 is rotated by rotating the rotating handle 16, so that the moving platform 151 moves horizontally along the horizontal threaded connecting rod 14 ( Figure 1 Y-axis direction), then by rotating the screw 17, the vertical threaded connecting rod 15 is moved along the vertical direction ( Figure 2 The water flow pulsation pressure sensor 21 is moved up and down (in the z-axis direction) to complete the position adjustment of the water flow pulsation pressure sensor 21. The experimental environmental factors are measured by the temperature sensor 11 and the water level meter 18, and the turbulence intensity of the sediment-laden water flow in the high sand content and very fine sediment water environment at various positions in the open channel flume 9 is measured by the water flow pulsation pressure sensor 21.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A system for measuring turbulence intensity of sediment-laden water flow, characterized in that: It includes a muddy water stirring tank (1), a sediment content measuring device (2), an open channel water tank (9), a movable measuring bridge (10), a water flow pulsation pressure sensor (21), and a signal testing and analysis unit (23); The muddy water stirring tank (1) is located on one side of the open channel water tank (9). The front area and the tail area of the open channel water tank (9) are connected to the muddy water stirring tank (1) through the muddy water inlet pipe (4) and the muddy water outlet pipe (8), respectively. The sediment content meter (2) is arranged in the muddy water stirring tank (1) and the front and tail tank bodies of the open channel water tank (9). The movable measuring bridge (10) is arranged above the open channel water tank (9) and moves horizontally along the direction of the open channel water tank (9). A vertical threaded connecting rod (15) is provided on the movable measuring bridge (10). The water flow pulsation pressure sensor (21) is fixedly installed at the lower end of the vertical threaded connecting rod (15). The water flow pulsation pressure sensor (21) is connected to the pressure transmitter (22) by wire, and the pressure transmitter (22) is connected to the signal test and analysis unit (23) by wireless transmission.

2. A system for measuring turbulence intensity of sediment-laden water flow according to claim 1, characterized in that: A plurality of water level gauges (18) are arranged at equal intervals on the inner wall of the open channel water tank (9), and the water level gauges (18) are connected to a signal receiver (19) via wireless communication, and the signal receiver (19) is connected to a data acquisition unit (20) via a wired connection.

3. The system for measuring turbulence intensity of sediment-laden water flow according to claim 2, characterized in that: A temperature sensor (11) is fixedly provided on the inner side wall of the middle portion of the open channel water tank (9), and the temperature sensor (11) establishes a wired connection with the data acquisition unit (20) via the signal receiver (19).

4. The system for measuring turbulence intensity of sediment-laden water flow according to claim 1, characterized in that: A water stabilizing grid (6) is provided in the front area of the open channel water tank (9), and the water stabilizing grid (6) divides the front area of the open channel water tank (9) into a forebay (5), and the forebay (5) is connected to one end of the muddy water inlet pipe (4).

5. The system for measuring turbulence intensity of sediment-laden water flow according to claim 1, characterized in that: A tail gate (7) for controlling the runoff is provided at the tail end of the open channel water tank (9), and the tail gate (7) establishes a control connection with a central control room (3) provided beside the open channel water tank (9).

6. The system for measuring turbulence intensity of sediment-laden water flow according to claim 1, characterized in that: The movable measuring bridge (10) comprises a horizontal threaded connecting rod (14), a vertical threaded connecting rod (15), a rotating handle (16) and a rotating screw (17); the horizontal threaded connecting rod (14) is connected to a movable platform (151) by a thread; the vertical threaded connecting rod (15) is threadedly connected to a side of the movable platform (151); the rotating screw (17) is inserted into the upper end of the vertical threaded connecting rod (15); bearing bases (132) are provided at both ends of the horizontal threaded connecting rod (14); the bearing base (132) is installed on the bridge frame (131); one end of the horizontal threaded connecting rod (14) passes through the bearing base (132) and is fixedly connected to the rotating handle (16); limiting rods (141) are symmetrically provided on both sides of the horizontal threaded connecting rod (14); the limiting rods (141) pass through the platform of the movable platform (151), and the two ends thereof are fixed on the bridge frame (131).

7. The system for measuring turbulence intensity of sediment-laden water flow according to claim 6, characterized in that: A roller (13) is provided at the lower portion of the movable measuring bridge (10). The roller (13) is rotatably mounted on the lower portion of the bridge frame (131) and is rollingly mounted on a water tank track (12). The water tank track (12) is mounted on the upper end surface of the open channel water tank (9).

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