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『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 difference between vortex flowmeter and orifice flowmeter?
1、 Technical comparison between vortex flowmeter and orifice flowmeter: ① The structure of vortex flowmeter is relatively simple, mainly composed of three components: vortex generator, detection element, and signal amplifier. Currently, our research on vortex generator in vortex flowmeter is quite mature. The vortex generator is in the form of a triangular column, and the vortex flowmeter also has the characteristics of easy installation, high precision and roundness, and stable long-term operation; ② At present, the technical level of orifice flow meters is still based on empirical formulas. In 1980, the International Organization for Standardization merged the R541 and R781 standards into the standard ISO5167 (1980); ③ The structure of orifice flow meters is also relatively simple, cost-effective, and reliable. They can measure almost all media, and can be used with differential pressure transmissions to compensate for their own shortcomings;
2、 Comparison of comprehensive performance between vortex flowmeter and orifice flowmeter: ① The orifice flowmeter consists of a throttling device and a differential pressure transmitter, and the pipeline requires heat tracing measures for frozen installation. There are several problems when using orifice flowmeter to measure flow: easy freezing, easy blockage, easy leakage, heat tracing can cause aging of the differential pressure transmitter device, and in some cases, isolation liquid needs to be added to the pressure pipe. Due to unstable heat tracing or