Metal tube rotor flowmeterIt is a widely used instrument for industrial process control and flow measurement. It has the advantages of simple structure, reliable operation, and wide range of applications. The following will provide a detailed introduction to the structure and working principle of the flowmeter.

　　

1、 Structure

　　

A flowmeter is mainly composed of three parts: a measuring tube, a rotor, and an indicator.

　　

1. Measuring tube

　　

The measuring tube is the core part of the flowmeter, which is a vertical, sealed, and pressure resistant metal tube. The inner diameter of the measuring tube is slightly larger than the diameter of the rotor, providing sufficient space for the rotor to move up and down inside the tube. The upper end of the measuring tube is connected to the pipeline through a flange, and the lower end is connected to the measured medium through a flange or inlet bend.

　　

2. Rotor

　　

The rotor is a crucial component of a gold flowmeter, and its shape and weight directly affect the measurement accuracy of the flowmeter. Common rotor shapes include spiral rotor, disc rotor, and cylindrical rotor. The weight and size of the rotor vary with the measured flow rate.

　　

3. Indicator

　　

The indicator is the reading part of the flowmeter, which converts the position signal of the rotor into a readable flow value through mechanical or electronic means. Common indicators include pointer type, wheel type, and electrical signal type.

　　

2、 Working principle

　　

The working principle of the metal tube rotor flowmeter is based on the principle of buoyancy. When the fluid flows through the measuring tube from bottom to top, the velocity of the fluid decreases, the pressure decreases, and the gravity part of the rotor in the fluid is reduced, while the buoyancy part increases. When the flow rate of the fluid increases, the rotor rises and the pointer of the indicator or the pointer on the disc rotates accordingly, indicating the flow rate of the fluid. When the flow rate of the fluid decreases, the rotor descends and the pointer of the indicator or the pointer on the disc rotates accordingly, indicating the flow rate of the fluid.

　　

The metal tube rotor flowmeter, as a simple structure, reliable operation, and widely used instrument, plays an important role in industrial process control and flow measurement. Understanding the structure and working principle of a rotor flowmeter can help to better use and maintain this instrument, improve measurement accuracy and reliability.