『Gas swirl vortex flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Working principle of vortex flowmeter
When the fluid passes through a vortex generator composed of spiral blades (see Figure 1), the fluid is forced to vigorously rotate around the axis of the generator, 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, where K - flow meter coefficient l/m³ F - Vortex frequency Hzq - Volume flow rate m³ /The instrument coefficient of the S-flowmeter is independent of the temperature, pressure, composition, and physical properties (density, viscosity, and roll) of the disturbed fluid within a certain range of structural parameters and specified Reynolds numbers. The flowmeter consists of sensors and conversion display devices.
1、 The sensor includes a vortex generator, detection element, rectifier, and housing. The vortex generator is composed of specific spiral blades, which are fixed at the front end of the shell contraction section, forcing the fluid to generate strong vortex flow. The detection element is installed near the throat of the expansion tube, and the frequency signal of vortex precession can be measured using thermal, piezoelectric, strain, capacitive, or fiber optic detection elements. The rectifier is fixed at the outlet of the
2、 The weak voltage signal detected by the piezoelectric sensor of the conversion display is amplified, filtered, and shaped into a pulse signal with a frequency proportional to the flow rate, and then counted and displayed by the display. The display device is equipped with an output interface to output various signals. The measured gas medium can be compensated for temperature and pressure, converted to volumetric flow rate under standard conditions, and displayed. Main features: 1. Built in pressure, temperature, and flow sensors, high safety performance, compact structure, and beautiful appearance. 2. Display temperature, pressure, instantaneous flow rate, and cumulative flow rate on site. 3. By adopting a new type of signal processing amplifier and unique filtering technology, the interference signals generated by pressure fluctuations and pipeline vibrations are effectively eliminated, greatly improving the anti-interference ability of the flowmeter and providing excellent stability for small flow rates. 4. The unique functions of time display and real-time data storage ensure that internal data will not be lost in any situation and can be permanently saved. 5. The whole machine has extremely low power consumption and can operate for a long time with internal battery power supply, making it an ideal on-site display instrument without the need for external power supply. 6. The anti-theft function is rel
Hot News
Related AD
