is a new type of gas flow meter with leading domestic level developed by Xiyuan Instrument. The flowmeter integrates the functions of flow, temperature, and pressure detection, and can automatically compensate for temperature, pressure, and compression factors. It is an ideal instrument for gas measurement in the petroleum, chemical, power, and metallurgy industries.
The flow profile of the flow sensor is similar to the profile of a Venturi tube (see Figure 1 below). A set of spiral guide vanes is placed on the inlet side. When the fluid enters the flow sensor, the guide vanes force the fluid to generate a violent vortex. When the fluid enters the diffusion section, the vortex is affected by the backflow and starts to rotate twice to form a gyro-type vortex precession phenomenon. The precession frequency is directly proportional to the flow rate, and is not affected by the physical properties and density of the fluid. The second rotation precession frequency of the fluid measured by the detection element can obtain good linearity over a wide range of flow rates. The signal is amplified, filtered, and shaped by a preamplifier and converted into a pulse signal proportional to the flow rate, and then sent to the microprocessor for integration processing with the detection signals such as temperature and pressure, and the measurement results are displayed on the LCD (Instantaneous flow, accumulated flow and temperature, pressure data).
1. Built-in pressure, temperature and flow sensors, high safety performance, compact structure and beautiful appearance.
2. Local display of temperature, pressure, instantaneous flow and cumulative flow.
3． The new signal processing amplifier and unique filtering technology are used to effectively eliminate the interference signals generated by pressure fluctuations and pipeline vibrations, which greatly improves the anti-interference ability of the flow meter and makes the small flow have excellent stability.
4． The unique time display and real-time data storage function ensure that internal data will not be lost under any circumstances.
5． The power consumption of the whole machine is extremely low, and it can run on the internal battery for a long time. It is an ideal display instrument without an external power source.
6. The anti-theft function is reliable, with password protection to prevent parameter changes.
7. The meter head can be rotated freely at 180 degrees for easy installation.
Basic technical parameters:
此流量范围上限可扩大1.5倍，保证正常使用。 Note: The upper limit of this flow range can be expanded by 1.5 times to ensure normal use.
1. Accuracy: the accuracy of the system after temperature and pressure correction;
2. A and B are used to distinguish different flow ranges with the same diameter.
外形尺寸图： Dimensional drawing of precession vortex flowmeter
Selection and selection:
When measuring gas, firstly estimate the higher and lower volume flow rate under the working state according to the gas transmission volume of the pipeline and the temperature and pressure range that the medium may reach, and correctly select the flowmeter specifications; for example, both calibers can cover the flow rate Range, if the pressure range allows, it is recommended to choose a smaller size flowmeter. In order to facilitate the maintenance and not affect the fluid transportation, it is recommended to install a bypass pipeline, and to ensure the specified straight pipe length. If the gas contains large particles or fibers, a filter should be installed upstream.
Company gas flowmeter calibration device: