Gas flow calibration method with temperature pressure adjusting capacity

Abstract

The invention discloses a gas flow calibration method with temperature pressure adjusting capacity. According to the method, compressed air passes through a drying filter and is stored in a high-pressure gas well; gas pressure in a pipe is continuously adjustable in a certain range by the aid of a multi-stage pressure adjusting device, so that the actual work pressure of a detected flow meter can be reached; control signals are determined through temperature measurement and feedback to control work of a condenser and a heater, the gas medium temperature is continuously adjustable in a certain temperature range, and accordingly, the actual work temperature of the detected flow meter can be reached; the gas working condition accumulative flow, the gas pressure and the gas temperature value at a standard meter and the detected flow meter under a detected flow point are acquired respectively, and the relative indication error of the detected flow meter is calculated. The method adopts the multi-stage pressure adjusting device to realize the continuous pressure adjustment in a certain pressure range, and the temperature in certain temperature range can be adjusted continuously through mounting of the condenser and the heater; the actual work temperature and pressure of the flow meter can be simulated as far as possible, and the effectiveness and the accuracy of detection can be improved.

Description

technical field [0001] The invention relates to a gas flow calibration device, in particular to a gas flow calibration method with adjustable temperature and pressure. Background technique [0002] With the rapid development of the national economy and the implementation of the national energy strategy, various gas flow meters are used in petroleum, metallurgy, electric power, coal, chemical industry, transportation, environmental protection, construction, textile, food and other fields. Its working temperature and pressure ranges are varied, and the corresponding detection requirements are gradually showing a trend of diversification. For example, with the emphasis on energy conservation and environmental protection in recent years, medium and high-temperature gases such as automobile exhaust, industrial smoke, process waste gas, and torch gas have become sources of environmental pollution that have attracted much attention. The quantitative control of these pollution sourc...

AI Technical Summary

Problems solved by technology

[0004] However, most of the current domestic gas flow standard devices use normal temperature air or natural gas as the measured medium, and the temperature and pressure of the medium cannot be adjusted, which brings inevitable disadvantages to the detection of gas flowmeters applied under medium, high temperature and pressure conditions. impact, it is far from meeting the detection requirements of gas flow meters

Images