Insertion type multi throat air flow meter

1、 Overview

The SLFS-C-DH plug-in flow measurement device is a special-shaped differential pressure intelligent flow measurement system developed and produced by our company's researchers based on years of field practice in flow measurement, principles of fluid mechanics, reference to standard ISO5167 and national standard GB2624-2006, using research results from disciplines such as aviation aerodynamics theory and aircraft engine internal fluid dynamics, and based on large-scale computer technology and wind tunnel experiments. It can achieve point surface integration and high-precision measurement.

Insertion type multi throat flowmeter is a high-precision flow measurement device that utilizes principles of aerodynamics and fluid mechanics theory to accurately reflect the flow field conditions of pipelines through multi-point measurements, thereby obtaining high-precision measurement results. Its structural characteristics make the plug-in multi throat flow meter very suitable for flow measurement of normal or high temperature gases (such as air, steam, natural gas, coal gas, flue gas) in industrial fields such as thermal power plants, steel plants, chemical plants, etc., especially in the measurement of primary and secondary air flow in thermal power plants

Two measurement principles

Under industrial and mining conditions, the SLFS-C-DH plug-in multi throat flow meter primary flow sensor is installed at the uniform velocity point of the pipeline. When the fluid medium passes through the SLFS-C-DH plug-in multi throat flow meter primary flow sensor, the characteristic parameters of the fluid medium detected through the pipeline are converted into electrical signals that can be collected and processed by various transmitters. The electrical signals are then calculated by the flow function in the secondary intelligent flow meter (or DCS system) programmable software, and the air or water flow rate through the large pipeline will be calculated.

The mathematical model of the flow measurement device is as follows:

Measurement characteristics:

Multi point measurement: This flowmeter adopts multi-point measurement, which can truly reflect the flow field condition of the pipeline, making the measurement results highly accurate.

■ Integrated structure: The integrated structural design makes transportation and installation very convenient for measuring large pipe diameters.

Applicability: It is suitable for flow measurement problems in ultra large and irregular pipelines, and can solve the problem of flow measurement for large pipe diameters and low flow velocities.

Low flow resistance and low power consumption: The plug-in multi throat flowmeter has small flow resistance and low power consumption, large system pressure difference, good stability, and almost no maintenance or upkeep required.

■ Anti clogging: Due to its unique structure, long-term use is not prone to clogging.

High precision: The range ratio can reach 1:10, and the total length of the straight pipe section including the device is only 1.5D of the equivalent diameter of the air duct. The front straight pipe section is required to be 0.5-1.5D, without the need for a rear straight pipe section.

■ Structural form and installation method: The plug-in multi throat flowmeter has multiple installation forms, including plug-in and integral. There are basic and integrated configurations in terms of configuration, and single point single measurement, single point dual measurement, and multi-point multiple measurement in terms of structural layout.

Product features: The plug-in multi throat radial flow measurement device also has the characteristics of low pressure loss, low requirements for straight pipe sections, online blowing and maintenance through additional anti blocking blowing devices, large differential pressure value, stable and reliable signal, long product life, small size and easy installation