Parallel installation and segmental measurement flow measurement method with large measurement range ratio and device thereof

Abstract

The invention discloses a parallel installation and segmental measurement flow measurement method with a large measurement range ratio and a device of the method. The device comprises a process pipeline, a first flow meter and a second flow meter, wherein the first flow meter and the second flow meter are arranged on the process pipeline in parallel. A normally-open first stop valve and a normally-closed second stop valve which correspond to each other and have the same caliber are arranged at the front end of the first stop valve and the front end of the second stop valve respectively. The measurement range lower limit of the second flow meter is slightly lower than the measurement range upper limit of the first flow meter. A PLC automatically detects the flow of liquid flowing through the process pipeline and carries out interlocking control on the first stop valve and the second stop valve in the manner that the first flow meter is adopted under a small flow and the second flow meter is adopted under a large flow. The method and device have the advantages that the measurement range ratio of the flow measurement device is effectively improved, measurement accuracy is high, and the method and device are suitable for energy medium measurement in a large measurement range; the device is easy and convenient to use, practical, reliable and high in operating control feasibility.

Description

technical field [0001] The invention relates to the field of large-scale ratio flow measurement for energy medium metering, in particular to a flow measurement method and device for measuring large-scale ratio by parallel installation and segmental measurement. Background technique [0002] Energy medium measurement is an important part of production management and cost control, and flow measurement device is the main tool for energy medium measurement. In the case of a certain caliber, various flow measurement devices have a certain range although their range ratios are different due to different measurement principles or methods. In the measurement of energy media, especially the measurement of the media main pipe, due to the asynchronous use of the media by each user, a peak-trough phenomenon occurs, and the medium flow fluctuates in a large range, which often exceeds the range of the current routinely used flow measurement devices. resulting in the inability to accurate...

AI Technical Summary

Problems solved by technology

When performing energy medium metering, especially the metering of the medium main pipe, due to the asynchronous use time of each user's medium, there will be a peak-valley phenomenon, and the fluctuation range of the medium flow rate is very large, which often exceeds the range of the currently used flow measurement device. making it impossible to accurately measure

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