High-precision fluid quantitative metering device and fluid quantitative metering method

Abstract

The invention provides a high-precision fluid quantitative metering device and a fluid quantitative metering method. The high-precision fluid quantitative metering device comprises a structural frame, an electronic weighing instrument, a fluid collecting device, a weight hanging frame and weights, wherein the precision value of the weights is a known value. During use, the theoretical flow is determined, the corresponding mass value M is calculated, the weight with the mass value M is loaded on the weight hanging frame, the indicating value K of the electronic weighing instrument is recorded, after the weight is unloaded, fluid flowing out of the flow meter is put into the fluid collecting device, and when the indicating value of the electronic weighing instrument becomes K, the actual flow flowing out of the flow meter is equivalent to the theoretical flow, and the theoretical fluid quantity is compared with the indicating value of the to-be-calibrated flowmeter so as to judge whether the precision of the to-be-calibrated flowmeter reaches the standard. The characteristics of high precision and good long-term stability of the weights are utilized, and the characteristic of good short-term repeatability of indicating values of the electronic weighing instrument is also utilized, so that high-precision quantitative metering of the flow of the flowmeter is realized, and the accuracy of calibration or verification results of the flowmeter is improved.

Description

technical field [0001] The invention relates to the technical field of flow verification, in particular to a high-precision fluid quantitative metering device and a fluid quantitative metering method. Background technique [0002] The current method of calibrating or verifying the flowmeter is usually to weigh the mass of the outflowing fluid by means of an electronic weighing instrument, and then convert it into a volume and compare it with the indicated value of the flowmeter. However, as the standard electronic weighing instrument itself is easily disturbed by environmental factors such as external electromagnetic fields, the long-term stability of the accuracy is poor. Generally, it needs to be repeated every six months at most once a year, resulting in high equipment maintenance costs. Resulting in reduced accuracy of flowmeter calibration or verification results. Contents of the invention [0003] In order to overcome the disadvantages of the above-mentioned prior a...

AI Technical Summary

Problems solved by technology

However, as the standard electronic weighing instrument itself is easily disturbed by environmental factors such as external electromagnetic fields, the long-term stability of the accuracy is poor.

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