Parallel structure and detection method of dual-gas flow standard device

Abstract

The invention provides a parallel structure and detection method of dual-gas flow standard device, and relates to the technical field of measurement. The gas source is connected with a tested flow meter, and the tested flow meter is respectively connected with a bell jar and a standard gas flowmeter through a tee joint; the gas accumulation amount of the bell jar, the standard gas flow meter and the tested flow meter is calculated through the pulse calculation, the gas accumulation amount of the bell jar and the standard gas flow meter is converted into the gas accumulation amount under the pressure and temperature state of the tested flow meter and is added to obtain a standard gas magnitude, and the measured flow meter value error is calculated according to the gas accumulation amount ofthe tested flow meter. The parallel structure and detection method of dual-gas flow standard device solves the technical problems that in the prior art, only the 'single type' standard device value is adopted, the flow range cannot be expanded, and the pressure loss is large. The parallel structure and detection method of dual-gas flow standard device has the advantages that different detection methods are achieved on the same set of devices, and meanwhile, the method is applied to the operation process; compared with a single or serial standard device, the flow range is larger; the test is richer than that of the method; the pressure loss is smaller.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a connection structure of a parallel double gas flow standard device and a method for detecting the gas flow meter. Background technique [0002] The gas flow standard device is used to verify or calibrate various gas flowmeters. According to the principle, it can be divided into: sonic nozzle gas flow standard device, bell type gas flow standard device, standard meter gas flow standard device. The standard devices used are sonic nozzle, bell jar, and standard gas flow meter, that is, these types of gas flow standard devices all use "single type" standard devices. There are also some gas flow standard devices using "combined type" standard devices in the industry, such as sonic nozzle plus standard meter device; or bell jar plus standard meter device. This type of device can realize different detection methods on the same device through the combined application of differen...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems of "single type" standard device or "serial combination type" standard device in the prior art that only adopt the value of "single type" standard device, the flow range cannot be expanded, and the pressure loss is relatively large, the present invention provides a A parallel structure and detection method of a dual gas flow standard device, realizing the simultaneous use of "parallel combination type" standard devices, enriching detection methods, expanding the flow range, and reducing pressure loss

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