Based on the research of ultrasonic flow meter scale two-way flow measurement

Abstract: based on the research of ultrasonic flow meter scale two-way flow measurement information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Abstract: ultrasonic flowmeter two-way flow measurement for the field measurements. Measurement results show that different manufacturer production of ultrasonic flowmeter measurement precision, the actual application, should according to the different characteristics of reverse measuring accuracy, choosing the appropriate flow meter. 。 More flow meter manufacturers choose model price quote you are welcome to inquire, here is a two-way flow measurement based on ultrasonic flow meter scale research article details. Two-way flow of ultrasonic flowmeter measurement field measurements. Measurement results show that different manufacturer production of ultrasonic flowmeter measurement precision, the actual application, should according to the different characteristics of reverse measuring accuracy, choosing the appropriate flow meter. In order to strengthen enterprise management, to strengthen the inspection, reduce production and marketing, many domestic water department has taken a partition, partition management model of water supply. Many cities in our country for water supply, partition line in two-way flow, therefore, must be measured respectively the same root water pipeline carrying capacity in both directions. With this problem, we studied the ultrasonic flowmeter two-way flow measurement. 1, test scheme due to national metrology technical institutions two-way flow of ultrasonic flowmeter measurement test is still not fully underway, also does not have this aspect of the standard experimental conditions, therefore, our own made the experiment scheme. First of all, the experiment must meet the basic working conditions of ultrasonic flowmeter, namely the upstream straight pipe length is more than 10 d ( Diameter) And downstream straight pipe length is greater than 5 d; Second, the experimental environment is consistent with the practical application conditions, namely the change in the direction of flow in the pipe section, the ultrasonic flowmeter. Downstream sensors associated with the host's position remains unchanged, the real ultrasonic flowmeter measurement modeling two-way flow of working environment. According to the above requirements, selected water deep well as experiment object. Measuring section for & phi; 7 mm 219 seamless steel tube, wall thickness, the velocity of 2. 0 m/s or so, flow less volatile, basic for constant flow. Straight pipe upstream than 50 d, downstream straight pipe is greater than 30 d. Measuring section for overhead. Flange connection, the vast space, installation and test conditions are ideal. The testing process with relative standard tables and checked online than in the method. 2, test contents and results of the test a total of seven sets of ultrasonic flowmeter to participate in the test. Type A1 ─ ─ FLB import the portable ultrasonic flowmeter ( Relative standard table) ； A2 ─ ─ FLC1 import portable ultrasonic flowmeter ( Checked table) ； Type A3 ─ ─ FLC2 import portable ultrasonic flowmeter ( Checked table) ； B1 ─ ─ TDS - 100 p improved domestic fixed type ultrasonic flowmeter ( Checked table) ； C1 ─ ─ TDS - 100 - p type domestic stationary ultrasonic flowmeter ( Checked table) ； C2 ─ ─ TDS - 100 - p type domestic stationary ultrasonic flowmeter ( Checked table) ； C3 ─ ─ TDS - 100 - p type domestic stationary ultrasonic flowmeter ( Checked table) 。 C1, C2 and C3 as the same table, is our company's application of the ultrasonic flowmeter mainstream phenotype, the main purpose of this experiment is to test whether the type of table to adapt to the two-way flow measurement. Testing process: (1) online calibration: first of all, relative standard table table A1 and checked for online measurement, and error correction, again repeated the experiment, test the revised inspection table error deviation degree, repetitive experimental results is good. (2) the test content: relative standard table A1 motionless, A measuring section A2, B1, C1 on the table, the downstream sensor interface to A job swap, reverse flow metering; B measuring rotate 180 degrees, the actual reverse flow measurement, displacement sensor not keep spinning process pipe section. The experimental results are shown in table 1: the permission of the ultrasonic flowmeter measurement error is 1. 5%, see from the above data, A2, A3, B1 table meet the requirements of the reverse measure and C1, C2, C3 table reverse measurement error is beyond the scope allowed. On this basis, we made a contrast experiment. The A, B section and flow meter are all positive connection, online after calibration, put A measuring section rotated 180 degrees, B measuring section on A3, C2, C3 A job swap test table, downstream sensor interface. 3 two tests, test analysis respectively to A, B of measuring meter is simulated reverse flow measurement and the actual flow measurement online comparison, the results are consistent, so can rule out the interference of man-made factors such as probe installation accuracy. In principle, the error of the ultrasonic flowmeter is, reverse flow measurement is consistent, but the test results show that is not the case, ordinary domestic ultrasonic flowmeter is qualified, reverse flow metering error, advanced domestic table and import table bidirectional measurement error is within the scope of the permit. Through the analysis and communication with the manufacturer, believe the phenomenon is due to the ultrasonic flowmeter, the downstream sensors and electronics, downstream channel on the consistency of performance matching and device sensitivity caused by the similarities and differences. Show the performance of the ultrasonic flowmeter for reverse flow measurement accuracy is crucial. 4, conclusion ultrasonic flowmeter in principle can be used for two-way flow measurement, but in practice must pay attention to the different phenotypic its reverse measurement accuracy of the different characteristics, select the appropriate phenotype. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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