Device for measuring and calculating average flow of cross section of channel in any shape

Abstract

The utility model relates to the technical field of flow measurement, in particular to a device for measuring and calculating average flow of river and canal sections in any shape, which comprises a ship, a sonar device mounted on the ship and a flow velocity and water head measuring device, and the sonar device and the flow velocity and water head measuring device are both communicated with a data processing device. The flow velocity and water head measuring device is a Pitot tube, and the Pitot tube comprises an underwater protection tube wall, a pressure measuring tube water head measuring tube connected to the underwater protection tube wall through a first connector, and a full water head measuring tube connected to the underwater protection tube wall through a second connector and extending into the underwater protection tube wall. And the data processing device is connected with a data display module. According to the utility model, the representativeness and the accuracy of flow measurement data in actual engineering and hydraulic calculation can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flow measurement technical field, concretely relates to a device of calculating average flow of arbitrary shape river channel section. BACKGROUND

[0002] In water conservancy and hydropower projects, the flow calculation of river channel is one of the basic parameters required by hydraulics calculation. At present, the instrument for measuring flow in actual engineering is generally flowmeter, and the flowmeter can only measure the flow of a certain point in the river channel, which is poor in representativeness and difficult to reflect the overall flow condition of the river. There is an urgent need for a measurement scheme that can measure the average flow of the arbitrary shape river channel section. UTILITY MODEL CONTENT

[0003] The utility model aims at overcoming the shortcomings in the background art and provides a device of calculating average flow of arbitrary shape river channel section to improve the representativeness and accuracy of flow measurement data in actual engineering and hydraulic calculation.

[0004] The utility model adopts the technical scheme as follows:

[0005] A device of calculating average flow of arbitrary shape river channel section, comprising a ship, a sonar device installed on the ship, a flow velocity and water head measuring device, wherein the sonar device, the flow velocity and water head measuring device are in communication with a data processing device.

[0006] In a further scheme, the ship comprises an unmanned ship or a remote control ship.

[0007] In a further scheme, the flow velocity and water head measuring device is a Pitot tube, and the Pitot tube comprises an underwater protection pipe wall, a pressure measuring pipe water head measuring pipe connected to the underwater protection pipe wall through a first connecting head, and a full water head measuring pipe connected to the underwater protection pipe wall through a second connecting head and extending into the interior of the underwater protection pipe wall.

[0008] In a further scheme, the sonar device and the data processing device are in wired communication or wireless communication.

[0009] In a further scheme, the flow velocity and water head measuring device and the data processing device are in wired communication or wireless communication.

[0010] In a further scheme, the data processing device is connected with a data display module.

[0011] The utility model has the beneficial effects that:

[0012] The utility model uses shipborne equipment to perform multi-point measurement on the river section, can simply and quickly measure and calculate the average flow of the arbitrary shape section in the actual engineering through the natural river channel or artificial channel, and improves the representativeness and accuracy of the flow measurement data. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the Pitot tube in an embodiment of this utility model.

[0016] Figure 3 This is a schematic diagram illustrating the working process of measuring the cross-sectional shape of a river channel according to an embodiment of this utility model.

[0017] Figure 4 A simplified flowchart of the measurement process according to an embodiment of this utility model.

[0018] Reference numerals: 1. Vessel; 2. Sonar device; 3. Canal; 4. Underwater topography; 5. Data transmission component; 6. Data processing device; 7. Pitot tube; 8. Underwater protection pipe wall; 9. First connector; 10. Pressure gauge head gauge; 11. Second connector; 12. Full head gauge; 13. Signal transmission line; 14. Display. Detailed Implementation

[0019] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments, but the present utility model is not limited to the following embodiments.

[0020] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of technical features. Thus, features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0022] As shown in Figure 1 The present embodiment provides a device for calculating average flow of arbitrary shape river channel cross section, which comprises a ship 1, a sonar device 2 installed at the bottom of the ship 1, a flow velocity and water head measuring device, the sonar device 2 and the flow velocity and water head measuring device are in communication with a data processing device 6, the data processing device 6 is connected with a data display module, such as a conventional display 14, through a signal transmission line 13, which is used to display the data processing results of the data processing device 6 and the area of the flow cross section and other data.

[0023] In one embodiment, the data processing device 6 can be a computer. In one embodiment, the ship 1 includes an unmanned ship without remote control or a remote control ship with manual remote control.

[0024] The sonar device 2 and the data processing device 6 communicate through a data transmission component 5 (such as a cable) or use wireless communication. The flow velocity and water head measuring device and the data processing device 6 are in wired communication through cable connection or use wireless communication.

[0025] As shown in Figure 2 The flow velocity and water head measuring device is a Pitot tube 7, which comprises an underwater protection pipe wall 8, a pressure tube water head measuring tube 10 connected to the underwater protection pipe wall 8 through a first connecting head 9, and a total water head measuring tube 12 connected to the underwater protection pipe wall 8 through a second connecting head 11 and extending into the interior of the underwater protection pipe wall 8. The inside of the pressure tube water head measuring tube 10 and the total water head measuring tube 12 are provided with corresponding sensors (sensors).

[0026] The method for calculating the average flow of the arbitrary shape river channel cross section is completed by using the device, which comprises the following steps:

[0027] Obtain the shape of the river channel cross section, calculate the area of the flow cross section;

[0028] Obtain the flow velocity of multiple measuring points on the flow cross section, calculate the average flow velocity;

[0029] Calculate the product of the area of the flow cross section and the average flow velocity to obtain the average flow of the flow cross section.

[0030] In the above method, the method for obtaining the shape of the river channel cross section comprises:

[0031] As Figure 3 , Figure 4 shown, the ship 1 carrying the bottom of the ship sonar device 2, from the measured river 3 from one side, perpendicular to the river direction, slowly to the other side of the river 3, the sonar reflection device measured underwater topography 4, the topographic data to the data processing device 6, the data processing device 6 through the operation, by means of Green's formula principle, the cross section area of the measured terrain is calculated;

[0032] Green's formula area measurement principle:

[0033] From Green's formula, when ∮P(x,y)dx+Q(x,y)dy=A∫∫ D dx dy=A×S D

[0034] That is: the area of the polygon surrounded by L

[0035]

[0036] The ship 1 draws the river cross section and the polygon area surrounded by the river surface by means of the sonar device 2, and the polygon area is surrounded by a finite number of line segments, which can be represented as: Then the measured river cross section flow area is:

[0037]

[0038] In the above method, the method for obtaining the flow velocity of a plurality of measuring points on the flow cross section comprises:

[0039] As Figure 3 shown, the ship 1 from one bank of the river 3, perpendicular to the other bank of the river 3, slowly drives, and under the control of the remote control equipment of the on-site control personnel, temporarily stops at different measuring points of the river, and obtains the flow velocity of the flow at the measuring point by measuring the pitot tube 7. After the ship 1 reaches the other bank of the river 3, the average value of the flow velocities of the plurality of measuring points is obtained, and the average flow velocity of the river cross section is obtained.

[0040] Pitot tube flow velocity measurement principle:

[0041] The pitot tube head measured by the pitot tube 10: The total head measured by the total head measuring pipe 12 The head difference of the two heads Further, through the data processing device 6, the following is calculated:

[0042]

[0043] The data processing device 6 further calculates the average flow Q=A*v of the measuring section according to the calculated river section area A and the average flow velocity data v of the section, and transmits the calculated section area A, the flow velocities of different measuring points of the river section, the calculated average flow velocity, and the calculated average flow Q of the section to the display 14 through the signal transmission line 13.

[0044] The preferred embodiments of the present application are described above, and those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for measuring the average flow of an arbitrary shaped river channel cross section, characterized by, The system comprises a ship, a sonar device installed on the ship, a flow velocity and water head measuring device, and a data processing device.

2. The device for measuring the average flow of a river channel of arbitrary shape according to claim 1, characterized in that, The ship is an unmanned ship or a remote control ship.

3. The device for measuring the average flow of a river channel of arbitrary shape according to claim 1, characterized in that, The flow velocity and water head measuring device is a Pitot tube, which comprises an underwater protection wall, a pressure tube water head measuring tube connected to the underwater protection wall through a first connecting head, and a full water head measuring tube connected to the underwater protection wall through a second connecting head and extending into the interior of the underwater protection wall.

4. The device for measuring the average flow of a river of arbitrary shape according to claim 1, characterized in that, The sonar device and the data processing device are in wired or wireless communication.

5. The device for measuring the average flow of a river of arbitrary shape according to claim 1, characterized in that, The flow velocity and water head measuring device and the data processing device are in wired or wireless communication.

6. The device for measuring the average flow of any shape river channel section according to any one of claims 1-5, characterized in that, The data processing device is connected with a data display module.

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