The Research On Testing Device Of Diaphragm Gas Meter’s Temperature Characteristic

Abstract:As the civil product to calculate the gas used in our daily life, the Diaphragm Gas Meters’ accuracy, which is yet measured by any suit of equipment in terms of the substantial results ushered in by the temperature, is greatly impacted by the working circumstance. With the development of science and technology of this era, the Diaphragm Gas Meter with temperature conversion device has been worked out with the precision of which being stipulated by the standard facilities.The testing device in my research is mainly pertaining to the Diaphragm Gas Meter influenced by the working condition and the calibration of the error to the Diaphragm Gas Meter with temperature conversion device.In reference to the available testing device and in light of the Verification Regulation of Diaphragm Gas Meters, the structure of the device can be divided into five parts:the thermostat, the Constant temperature experiment box, calibration system, air supply system and the pipeline system. In combination with the heat transfer theory、Fluid mechanics and other related theoretical knowledge, the device’s structure is planned with the design calculation and the control system of the testing device being achieved.In the calculation, the essay, combining the theoretical analysis, numerical simulation with experimental demonstration, firstly choose to calculate some parameters according to the theoretical formulations, and then make some numerical simulation and auxiliary design with the CFD so as to get the accurate value. In the process of numerical simulation, the optimization of the heat exchanger material size is fulfilled, the coefficient of heat transfer is confirmed and the temperature control of the thermal Systems is stipulated.Master meter method is selected as the calibration method, the Heat exchange system including heat exchanger and incubator serves as the regulator of temperature, passive pressure method is chosen to utilize the atmosphere as the gas source of the device, vacuum pump and vacuum container are utilized to create the stable passive pressure condition. The design of the pipeline is achieved under the certain verification conditions, operating requirements and experimental environmentIn reference to the Verification Regulation of Flow Standard Facilities by Master Meter Method, uncertainty is being analyzed and calculated and then composed to ensure the authenticity of the temperature influenced. The software of kingview and the PLC are used to detect the device, the reliable rating data can be acquired through the testing experiments under the ideal circumstance.Through the theoretical analysis and test results, the experimental data are obtained in the actual operating conditions and the reliability and rationality of the Diaphragm Gas Meter is testified. The overall equipment is convenient in manipulation, stable in operation and desirable in design.