『Vortex flowmeter orifice 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. What are the representation methods for various types of flow meters in PID flowcharts?
The common representation methods for flow meters in P&ID (Process Piping and Instrument Diagram) mainly use dedicated graphic symbols to match the instrument tag area. The specific explanation for the four types of mainstream flow meters is as follows: 1 Orifice flowmeter symbol: Represent the orifice plate with a rectangular shape, connect the pipeline lines at both ends of the rectangle, and label the corresponding instrument tag number on the side. Working logic: It belongs to a throttling flowmeter. When the fluid passes through the orifice plate, a pressure difference will be generated. By measuring the pressure difference, the flow rate value can be converted.
2. Turbine flowmeter symbol: represented by a circular symbol with blades, with corresponding instrument tag numbers marked on the side. Working logic: The fluid impacts the turbine blades to rotate, and the turbine speed is proportional to the fluid flow rate. Flow data can be obtained by detecting the speed. Electromagnetic flowmeter symbol: represented by a rectangular or circular symbol with electrodes, with corresponding instrument tag numbers marked on the side. Working logic: Based on the principle of electromagnetic induction, when a conductive liquid flows through a magnetic field, an induced electromotive force is generated. The flow rate can be determined by measuring the electromotive force.
4. Vortex flowmeter symbol: represented by a symbol with the vortex Tucson basis, with the corresponding instrument tag number marked on the side. Working logic: When a fluid flows through a vortex generator, periodic vortices are generated, and t
2. What is the name of the instrument for measuring gas extraction flow rate?
The instruments for measuring gas extraction flow rate mainly include orifice flow meters, vortex flow meters, thermal gas mass flow meters, and ultrasonic flow meters.
. 1. Orifice flowmeter uses throttling device to measure pressure difference to calculate flow rate, which is characterized by simple structure, low price, but large pressure loss and accuracy affected by installation conditions.2. Vortex flowmeter is based on Karman vortex street principle to detect vortex frequency, which is characterized by wide measurement range, high accuracy, and small pressure loss, but weak anti vibration ability.
3. Thermal gas mass flowmeter uses thermal diffusion principle to directly measure gas mass flow rate, which is characterized by high accuracy, fast response, can measure low flow rate, but is sensitive to impurities and humidity and expensive.
4. Ultrasonic flowmeter calculates flow rate through ultrasonic propagation time difference, which is characterized by non-contact measurement, no pressure loss, suitable for large pipe diameter, but expensive.
High precision and affected by the inner wall and impurities of the pipeline.
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