[China Glass Net] Glass Rotor Flowmeter Introduction: The float flowmeter, also known as the rotor flowmeter, is a type of variable area flowmeter. In a vertical cone tube that is enlarged from bottom to top, the circular cross section of the float Gravity is absorbed by the liquid power, and the float can rise and fall freely within the cone. It moves up and down under the action of flow velocity and buoyancy, and after balancing with the weight of the float, it is transmitted to the dial and indicated by the magnetic coupling. Generally divided into glass and metal rotameters. Metal rotameter is commonly used in industry. For small diameter corrosive media, glass is usually used. Due to the fragility of glass material, the key control points are also made of precious metal such as titanium. .
The glass rotor flowmeter is a variable area flow meter based on float position measurement. It adopts all-metal structure and Modular concept design. It has small pressure loss and large turndown ratio (10:1). It is easy to install and maintain and can be widely used for complex. Flow measurement and process control in harsh environments and various media conditions.
Characteristics of glass rotor flowmeter: Glass rotor flowmeter is a kind of flowmeter commonly used in industry and laboratory. It has the characteristics of simple structure, intuitive, small pressure loss and convenient maintenance. Rotameters are suitable for measuring small flows through pipe diameters D < 150 mm, as well as for corrosive media. In use, the flow meter must be mounted on a vertically running pipe section and the fluid medium passes through the rotameter from bottom to top.
The working principle of the glass rotameter: the rotameter consists of two parts, one of which is a conical tube that gradually enlarges from the bottom to the top; the other part of the rotameter is placed in a conical tube and can be placed along the tube The center of the line moves freely under the rotor. Rotor Flow Meter When measuring the flow rate of a fluid, the fluid to be measured flows in from the lower end of the conical tube. The flow of the fluid impinges on the rotor and exerts a force on it (the magnitude of this force varies with the flow rate); when the flow rate is large enough At this time, the generated force lifts the rotor and raises it. At the same time, the fluid to be measured flows through the annular section between the rotor and the wall of the conical tube, and flows out from the upper end. When the measured fluid flows, the force acting on the rotor is exactly equal to the weight of the rotor in the fluid (called the display weight), and the rotor is under equilibrium and stays at a certain height. The analysis shows that the height of the rotor in the conical tube has a corresponding relationship with the flow rate passed. Therefore, by observing the positional height of the rotor in the conical tube, the corresponding flow value can be obtained.
In order to prevent the rotor from hitting the pipe wall when moving down the centerline of the conical pipe, two methods are usually used: one is to install a guiding mandrel in the center of the rotor to keep the rotor in the center line of the conical pipe. The other is to move up and down the edge of the rotor disc. When the fluid flows from the bottom to the top of the rotor, one side bypasses the rotor, and at the same time passes through the chute to generate a reverse thrust, so that the rotor does not wrap around the center line. Rotate the ground to keep the rotor from hitting the pipe wall during operation. The rotor material of the glass rotor flowmeter can be made of stainless steel, aluminum, bronze or the like.
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