Steam vortex flowmeter

Steam vortex flowmeter

Overview

The Steam Vortex flowmeter is mainly used to measure the flow of the steam medium fluid in the industrial pipeline. The Steam Vortex flowmeter is characterized by small pressure loss, large measuring range and high precision, when the volume flow rate is measured, it is hardly affected by the parameters such as fluid density, pressure, temperature and viscosity. No movable mechanical parts, so high reliability, small maintenance. The instrument parameters can be stable for a long time. The Steam Vortex flowmeter adopts piezoelectric stress sensor with high reliability and can work in the temperature range of-20 °c ~ + 250 °C. There are analog standard signal, but also digital pulse signal output, easy to use with computers and other digital systems, is a more advanced, ideal flow meter.

Workinfg principle

The principle is that when a triangular cylinder vortex generator is placed in a steam fluid, regular vortices, called Carmen’s vortices, are alternately generated from both sides of the vortex generator, as shown in the right picture, the vortices are arranged unsymmetrically downstream of the vortices. If the frequency of the vortex is f, the average velocity of the medium is V 1, the width of the upstream surface of the vortex body is D, and the surface diameter is d, the following relationship can be obtained:

There are many kinds of steam vortex flowmeter, for example, according to the connection mode can be divided into flange connection and clamping connection, according to the compensation mode can be divided into compensation type and remote transmission type, according to the structural use can be divided into explosion-proof type, high-temperature type, corrosion-resistant type and so on. Today, I would like to introduce the LUB series Vortex Street flowmeter six types. IN-PLACE DISPLAY: flow data field display. FRANÇA TYPE: flow meter body has no Flange, the pipeline has flange, the pipeline is tightened by bolts to clamp the flow meter. Flanged connection type: Body and pipe have flanges, a pair of fixed installation. Pressure compensation type: automatic pressure compensation operation. Integrated temperature and pressure compensation: Integrated temperature and pressure compensation function. High temperature type: suitable for use at higher temperature.

Features

From the above equation, it can be seen that the pulse frequency signal of VSF is not affected by the change of the physical properties and components of the fluid, that is, the instrument coefficient is only related to the shape and size of vortex generators and pipes within a certain range of Reno number. However, as a flowmeter, mass flow must be detected in material balance and energy measurement, when the output signal of the flowmeter should simultaneously monitor the volume flow and fluid density, the physical properties and components of the fluid have direct influence on the flow measurement. The Steam Vortex flowmeter is a new type of flowmeter which measures the flow of fluid in closed pipe according to Carmen Vortex principle. Because of its good medium adaptability, the volume flow of steam, air, gas, water and liquid can be measured directly without temperature and pressure compensation, equipped with temperature and pressure sensors to measure the volume flow rate and mass flow rate, is an ideal substitute for throttling flowmeter.

Main tech data

Measuring medium: STEAM CALIBER SPECIFICATION: DN25 ~ DN300 CONNECTION MODE: França Assembly type, Flange connection type flow measuring range, normal measuring flow rate range, Reno number 1.5 × 104 ~ 4 × 106; Gas 5 ~ 50ms; Measuring accuracy of liquid 0.5ー7m/s: 1.5 grade measured medium temperature: normal temperature 25 °C ー100 °C high temperature 25 °C ー150 °C ー25 °c ー250 °c output signal, pulse voltage output signal, high Level 8 ~ 10V low level 0.7 ~ 1.3 v pulse duty cycle about 50% , transmission distance 100m pulse current far transmission signal 4 ~ 20ma, transmission distance 1000m instrument use environment, temperature:-25 °C ~ + 55 °C humidity: 5 ~ 90% RH50 °c material, stainless steel, aluminum Alloy power supply DC24V or lithium battery 3.6V explosion-proof Grade, Intrinsic Safety type IAIIBT3-T6 Protection Grade IP65