Spiral vortex gas flowmeterWorking principle and installation precautions

Instrument Introduction:
Spiral vortex gas flowmeterA new type of gas flow meter with * level. The flow meter has the functions of collecting flow rate, temperature, and pressure detection, which can automatically compensate for temperature, pressure, and compression factor during operation. The measurement signal can be displayed locally or transmitted remotely as needed without moving parts. Therefore, for general measurements, there is no mechanical wear of the instrument, and instrument management personnel do not need professional training. Measurement parameters such as flow rate, pressure, and temperature can be directly read from the meter head without conversion; The integration of mechanical and electrical systems has been achieved, and the daily measurement process does not require manual supervision. The installation conditions are not harsh, and the upstream and downstream straight pipe sections of the instrument can be greatly shortened compared to orifice flow meters. The measurement accuracy of the system can meet the current requirements of trade measurement.
Working Principle:
Spiral vortex gas flowmeterWhen the fluid passes through a vortex generator composed of spiral blades, it is forced to vigorously rotate around the body axis, forming a vortex. When the fluid enters the diffusion section, the vortex flow is subjected to backflow and begins to undergo secondary rotation, forming a gyroscopic vortex precession phenomenon. The precession frequency is proportional to the flow rate and is not affected by the physical properties and density of the fluid. The flow rate can be determined by measuring the frequency of secondary rotation and precession of the fluid using the detection element. And it can achieve good linearity over a wide range of flow rates. The flow calculation formula is: K=f/q
In the formula: K - flow meter coefficient l/m&sup3
F - Vortex frequency Hz
Q - Volume flow rate m ³/s
The instrument coefficient of a flowmeter is independent of the temperature, pressure, composition, and physical properties (density, viscosity) of the fluid within a certain range of structural parameters and specified Reynolds numbers.

Installation precautions:
1. Sensors can be installed in vertical, horizontal, or any inclined position according to the flow direction indicator;
2. When the pipeline is long or close to the vibration source, supports should be installed upstream and downstream of the flowmeter to eliminate the impact of pipeline vibration;
3. The installation location of the sensor should have sufficient space for the inspection and maintenance of the flowmeter, and should meet the environmental requirements of the flowmeter;
4. Avoid interference from strong external magnetic fields;
5. When installed and used outdoors, there should be a cover to avoid direct sunlight and rainwater erosion, which may affect the service life of the instrument;
6. When conducting pipeline pressure testing, attention should be paid to the pressure measurement range of the pressure sensor equipped on the intelligent flowmeter to avoid damaging the pressure sensor due to overpressure.
7. Attention should be paid to the influence of installation stress. The upstream and downstream pipelines of the flowmeter should be coaxial, otherwise shear stress will be generated. The installation location of the flowmeter should consider the thickness of the sealing gasket or install an elastic expansion joint on the downstream side.
8. Before installing the flow meter, the welding slag and other debris in the pipeline should be removed first.
9. When put into operation, the upstream and downstream valves of the flowmeter should be slowly opened to avoid sudden rapid airflow and damage to the starter.
10. When the flowmeter requires signal remote transmission, it should be strictly connected to an external power supply (8-24) VDC according to the "electrical performance indicators" requirements. It is strictly prohibited to directly connect a 220VAC or 380VAC power supply at the signal output port;
11. Users are not allowed to change the wiring method of the explosion-proof system and arbitrarily twist various output lead connectors;
12. When the flowmeter is running, it is not allowed to open the back cover and change the instrument parameters at will, otherwise it will affect the normal operation of the flowmeter;
13. Regularly check for leaks at the flange of the flowmeter.