A Flow Measuring Method of Pumping Station Based on Volumetric Method
A volumetric method and flow rate technology, applied in the field of measurement method, can solve the problems of adverse effects on the safe operation of pumping stations and water pipeline networks, high measurement costs, time-consuming and labor-intensive, etc. well-defined effect
Active Publication Date: 2018-11-23
HOHAI UNIV
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Problems solved by technology
Due to the relatively flat terrain, the pump station mostly uses axial flow pumps or mixed flow pumps. The water flow is pressurized into the outlet pool, and is transported to the field through the low-pressure pipeline connected to it, making the traditional channel flow rate measuring instrument unusable.
[0003] Due to the short straight section of the inlet and outlet pipes of axial flow pumps, it is difficult to meet the installation and flow measurement requirements of ultrasonic and electromagnetic flowmeters
For the pumping stations that have been built, it is necessary to reinstall the pipeline flow measurement equipment to carry out the measurement, which is not only time-consuming and laborious, but also has high measurement costs, and will adversely affect the safe operation of the pumping station and the water pipeline network
Method used
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[0022] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.
[0023] A pumping station flow measurement method based on the volumetric method, comprising the steps of:
[0024] Step 1: If Figure 1 Place the water level gauge at the bottom of the outlet pool as shown, and turn on the water pump;
[0025] Step 2: Use the water level gauge to collect the data of the pool water level and save it in the computer. The data reading cycle is 1 / 8 second, and the data collection frequency is 8Hz;
[0026] Step 3: After converting the data in the computer into EXCEL format, filter the data, take the time as the abscissa and the water level as the ordinate, and draw the water level change curve, as shown in figure 2 Shown; the rising part on the left is the water inlet curve after starting up, and the water receding curve after stopping is on the right side.
[0027] Step 4: Select any water depth on the a...
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The invention discloses a pump station flow rate measurement method based on a volumetric method. The method comprises the steps that time-based changing data of the water level of an outlet pond during switching-on and switching-off of a pump station can be rapidly measured according to the volumetric method and water level-flow rate relations, and the data is stored in electronic equipment; and then, according to hydraulics theories and mathematical computation, water outlet flow rates of the outlet pond under the different water levels can be obtained, namely a flow rate of the pump station is obtained. The data collection equipment is portable, simple and light and is suitable for field operations; the equipment can record the data after being connected to a common portable computer or a tablet PC, wherein the whole measurement course requires a short time and is not interfered by external conditions; and testing principles are explicit, later-stage computation courses are simple and practical and results are accurate and reliable.
Description
technical field [0001] A measurement method, in particular a flow measurement method for pumping stations based on the volumetric method. Background technique [0002] There are a large number of water-lifting irrigation areas in southern Jiangsu, Shanghai and other areas around Taihu Lake, and low-pressure pipeline water delivery technology is widely used. Due to the relatively flat terrain, the pumping station mostly uses axial flow pumps or mixed flow pumps. The water flow is pressurized into the outlet pool and transported to the field through the low-pressure pipeline connected to it, making the traditional channel flow rate measuring instrument unusable. [0003] Due to the short straight section of the inlet and outlet pipes of the axial flow pump, it is difficult to meet the installation and flow measurement requirements of ultrasonic and electromagnetic flowmeters. For the pumping station that has been built, it is necessary to reinstall the pipeline flow measureme...
Claims
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IPC IPC(8): G01F13/00
CPCG01F13/00
Inventor 郭相平刘敏昊陈盛王振昌王洁操信春
Owner HOHAI UNIV