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What are the types of pipeline flow meters?
There are various types of pipeline flow meters, and the common ones are as follows
1. Electromagnetic flow meters work based on Faradays law of electromagnetic induction, measuring the absence of moving parts and resistance parts inside the pipeline, and will not cause pressure loss to the fluid.
. 2. Vortex flowmeter can measure liquids with a certain conductivity, such as sewage, acidic and alkaline liquids, etc. By using the principle of fluid vibration, a blocking fluid is placed in the fluid to generate a regular vortex column, and the flow rate is measured by detecting the vortex frequency of the pin chain. Can be used for flow measurement of gases, vapors, and liquids, such as compressed air, natural gas, etc.3. Turbine flowmeter: When the fluid passes through the pipeline, it impacts the turbine blades, causing the turbine to rotate. Its speed is proportional to the flow velocity of the fluid, and the flow rate is calculated by measuring the turbine speed. Commonly used for flow measurement of clean liquids and gases, such as light petroleum products in the petroleum and chemical industries. Ultrasonic flow meters measure flow by detecting the time difference, phase difference, or frequency difference caused by the flow of ultrasonic waves in the fluid. It can measure various liquids and gases, especially suitable for flow measurement of large diameter and difficult to install pipelines.
5. Orifice flowmeter is installed in the pipeline with an orifice plate. When the fluid flows through the orifice plate, a pressure difference is generated before and after the orifice plate, and the flow rate is calculated by measuring the pressure di
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2. Where should the plug-in electromagnetic flowmeter be installed in the pipeline?
The optimal installation position for the plug-in electromagnetic flowmeter is the vertical pipe section where the fluid flows from bottom to top, followed by the horizontal pipe section that meets the flow requirements. The installation conditions of front and rear straight pipe sections, full pipe, and no electromagnetic interference must be strictly followed.
.1. Vertical pipeline installation (preferred working condition) 1 Select a vertical pipe section where the fluid flows upstream, completely filling the pipeline without problems such as gas-liquid stratification, bubble adhesion to electrodes, or solid precipitation, with the highest measurement accuracy. 2. Ensure that the length of the upstream straight pipe section is not less than 5 times the nominal diameter D of the pipeline (where D is the nominal diameter of the pipeline), and the downstream straight pipe section is not less than 3 times D. Avoid components such as elbows, valves, and reducers that can disrupt the flow state. 3. The insertion direction of the sensor should be consistent with the direction of fluid flow to avoid reverse impact damaging the electrode or interfering with the measurement signal.
2. Installation of Horizontal Pipelines (Secondary Selection Zhenzhi Plan) 1 Only when the vertical pipeline cannot be constructed, the sensor electrode needs to be installed on the horizontal centerline of the pipeline to avoid the accumulation of bubbles above the electrode or solid precipitation covering the electrode. 2. It is also