Characteristics of Metal Rotor Flowmeter and Its Selection and Use of Electronic Temperature Controller

metal rotor flowmeter is used as one-time inspection component of small flow meter, which is successively verified in argon gas metering of special steel plant brand temperature controller system software, medium application of metering verification system software for oxygen cylinders in small factories and metering verification system software for oxygen cylinders in foundry factories, among them, in the software of the measurement verification system for oxygen cylinders in small and medium-sized factories, the metal material professional thermostat rotameter has been operating smoothly for several months and has obtained excellent practical results of accurate measurement.

The following is an overview of the characteristics of metal rotor flowmeters and the problems of motor selection and application.

The basic principle and characteristics of accurate measurement of 1. metal rotameter The accurate measurement of metal rotameter is partly composed of an orifice plate and a cone oil level sensor. When fluid mechanics flows upward through the water pipe, the cone The oil level sensor moves upward to achieve equilibrium in a certain part. At this time, the annular gap between the oil level sensor and the orifice plate is maintained constant, and the total area of the annular gap is proportional to the aspect ratio of the increase of the oil level sensor, and a certain aspect ratio of the oil level sensor means the size of the total flow through. When the oil level sensor moves left and right, it is transmitted to the external indicator in a magnetic coupling manner, so that the indicator needle follows the offset of the oil level sensor, And rely on the camshaft plate to make the meter needle linearly indicate the size of the total flow. The characteristic metallic material rotor flowmeter features a simple and clear structure, reliable operation, a wide range of applications, and a high measurement range, typically 10:1. Motor Selection of 2. Metal Material Rotameter When accurately measuring liquid, metal material rotameter is generally marked with water at thermodynamic temperature (20e). When accurately measuring vapor, the scale is marked with gas at thermodynamic temperature (20e, absolute pressure 011013MPa). Therefore, when the instrument panel motor selection is carried out for a certain accurate measurement fluid mechanics, its total flow category should be calculated as the thermodynamic temperature drainage or gas total flow, and then the motor selection should be carried out according to the calculated total flow category and the standard scale of the metal rotor flowmeter. The following example illustrates the oxygen cylinder usage in the riveting and welding workshop within the metrological verification software system for oxygen cylinders at a foundry. The following pipe Ф 70 @ 5 was recorded in the original record. The oxygen concentration for zui thickness is 110 m3h; Zui small oxygen concentration is 10 m3h; Pressure 113MPa; Operating temperature 30e; The local average atmospheric pressure is 011MPa. In the calculation formula, ZS(ZSN) is the compression coefficient of the measured vapor at thermodynamic temperature (working attitude) (general condition ZSUZSN);QS is the actual total flow of oxygen cylinders under load; QN is the actual total flow of gas under standard conditions; QN is the density of air under standard conditions (11293 kgm3);pN is standard atmospheric pressure; TN is the specification temperature