Novel device for measuring flow of pump station
A flow measurement device and pumping station technology, which is applied in the direction of detecting fluid flow by measuring pressure difference, volume/mass flow generated by mechanical effects, etc., can solve problems such as difficult operation, poor precision, and complicated operation, and achieve high measurement accuracy, Easy to make, easy to use effects
Inactive Publication Date: 2012-02-01
YANGZHOU UNIV
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Problems solved by technology
The brine concentration method has been eliminated due to complicated operation, high cost and poor accuracy
The pressure difference measurement method of the inlet channel has the problems of poor pressure difference stability and low data reliability
The method of flow measurement with multi-point current meter and five-hole probe has the disadvantages of large amount of measurement preparation work, difficult operation, long data collection period, and cannot be used as a fixed instrument for online detection.
The ultrasonic flowmeter can only be installed in the flow channel because the large pumping station does not have a regular cross-section straight section that meets its installation conditions, which is inconvenient for installation and maintenance, and the accuracy in practical applications is not high
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[0013] like figure 1 (A, B), figure 2 , image 3 and Figure 4 Shown:
[0014] The flow measuring device is composed of flow measuring vanes 3 , hub 2 and seat ring 1 . The hub 2 is located at the center of the seat ring 1, and four flow-measuring blades 3 arranged vertically and symmetrically connect the seat ring 1 and the hub 2, as shown in figure 1 As shown in (A), it is installed in front of the water pump impeller 6 inlet as a whole through the outer seat ring 1 (in figure 2 , image 3 In the shown vertical unit, the flow measuring device is located at the lower part of the impeller 6); according to the principle of equal flow, the water flow section where the flow measuring device is located is divided into 3 to 5 adjacent flow rings, in this example, 4 phase flow rings Adjacent flow rings; each flow ring has a cross-section surface with the water-facing front of the flow-measuring blade 3, and the center of the cross-section surface is facing the direction of t...
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The invention relates to a novel device for measuring the flow of a pump station. The device adopts a structure that: a hub is positioned in the center of a circle of a seat ring; and a flow measurement blade is used for connecting the seat ring and the hub and arranged in front of an inlet of a water pump impeller. The device is technically characterized in that: a water-crossing section is divided into 3 to 5 adjacent overflowing rings; each overflowing ring has an intersection surface with a water-facing front surface of the flow measurement blade; a dynamic pressure sampling point is formed in the center, facing the direction of water flow, of the intersection surface; and a static pressure sampling point is formed on the flow measurement blade. By adoption of the device, the defects of a brine concentration method, a method for measuring the pressure difference of an inflow runner, a method for measuring the flow by using a multi-point flow meter and a method for measuring the flow by using a five-hole probe are overcome. The device accords with a fluid mechanics principle and is high in measurement accuracy, stable in data, high in adaptability, low in cost, easy to manufacture and convenient to use; the flow can be dynamically detected in real time; and the remote control, automatic scheduling and optimized operation of operation management of the pump station can be realized.
Description
technical field [0001] The invention relates to a pumping station flow measuring device, in particular to a novel pumping station flow measuring device. Background technique [0002] Before the present invention, the flow measurement of large-scale pumping stations usually adopts brine concentration method, water inlet channel pressure difference measurement method, multi-point flow meter flow measurement and five-hole probe flow measurement method. In recent years, ultrasonic flowmeters are also used in large pumping stations. . The brine concentration method has been eliminated due to its complicated operation, high cost and poor accuracy. The differential pressure measurement method of the water inlet channel has the problems of poor pressure differential stability and low data reliability. The method of flow measurement with multi-point current meter and five-hole probe has the disadvantages of large amount of measurement preparation work, difficult operation, long dat...
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IPC IPC(8): G01F1/34
Inventor 陈松山何钟宁周正富薛丰进李曙光
Owner YANGZHOU UNIV
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