Double standard gas flow device parallel structure and detection method

Abstract

The invention provides a double standard gas flow device parallel structure and a detection method, and relates to the technical field of measurement. A gas source is connected to a to-be-detected flowmeter. The to-be-detected flowmeter is connected to a bell jar and a standard gas flowmeter through a tee joint. Gas accumulation amount of the bell jar, the standard gas flowmeter and the to-be-detected flowmeter through pulse. The gas accumulation amount of the bell jar and the standard gas flowmeter is converted into gas accumulation amount of the to-be-detected flowmeter under pressure and temperature, and the gas accumulation amount of the bell jar and the standard gas flowmeter and the gas accumulation amount of the to-be-detected flowmeter under pressure and temperature are added together to obtain a standard gas volume value. A to-be-detected flowmeter value error is obtained by calculation of the gas accumulation amount of the to-be-detected flowmeter. The double standard gas flow device parallel structure and the detection method solve the technical problems in the prior art that a standard device only uses a ''single type'' standard device value, a flow range cannot be expanded and the pressure loss is large. The double standard gas flow device parallel structure and the detection method have the beneficial effects that different detection methods are implemented on thesame set of device and applied in calculation processes, the flow range is large, the pressure loss is small, and the device calibrates single points of the standard gas flowmeter on line, which eliminates mounting errors.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a connection structure of a parallel double-standard gas flow 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 double-standard gas flow device, realizing the simultaneous use of "parallel combination type" standard devices, enriching detection methods, expanding the flow range, and reducing pressure loss

Images