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1. Working principle of vortex flowmeter
The working principle of vortex flowmeter is based on the alternating arrangement of vortices generated by fluid passing through vortex generators, and the flow rate is calculated by detecting the vortex frequency. 1. Core working principle: When the fluid flows into the flowmeter, it first passes through a set of spiral guide vanes and is forced to rotate to form a vortex. After entering the expansion section, this vortex generates a spiral motion, and its center moves around the central axis of the instrument like a spiral line. The vortex frequency is proportional to the flow velocity, and the flow rate can be calculated by detecting the vortex frequency through a piezoelectric sensor. 2. Key component functions: Vortex generator: a specially designed spiral blade structure that forces the fluid to rotate. Sensor: usually piezoelectric, detects pressure fluctuations caused by vortex frequency. Signal processor: converts the frequency signal into a standard current signal (4-20mA) or digital signal. 3. Technical features: Measurement accuracy: ± 1.0% to ± 1.5% (liquid), ± 1.0% to ± 2.0% (gas). Range ratio: usually up to 10:1 or 15:1. Working temperature: -40 ℃ to+300 ℃ (depending on the sensor type). Pressure rating: up to 25MPa. Application precautions: Installation required. Ensure that the length of the front straight pipe section is ≥ 5DN and the length of the rear straight pipe section is ≥ 3DN (DN is the pipe diameter). Not suitable for low flow velocity measurement, the minimum flow rate needs to maintain the Reynolds number within a specific range. Media containing solid particles or fibers may block vortex generators and require the installation of filters. <
2. Tianxin TDS-200B Intelligent Spiral Flow Meter User Manual: [2]
The core content of the Tianxin TDS-200B Intelligent Spiral Flow Meter User Manual is as follows:
1. Product Overview Tianxin TDS-200B Intelligent Spiral Flow Meter is a flow measurement instrument designed based on the principle of spiral vortex, suitable for flow measurement of gases or liquids.
. Its core components include the precession generator, sensors, and intelligent processing unit, which achieve high-precision measurement by detecting the vortex frequency generated by the fluid.2. Instructions for use: The flowmeter should be installed horizontally in the pipeline to avoid measurement errors caused by tilting or vertical installation.
. The installation location should be away from vibration sources, bends, or valves to ensure stable fluid flow. The length of the front and rear straight pipe sections must meet the following requirements: front ≥ 10D, rear ≥ 5D (D is the diameter of the pipeline). Wiring and debugging power supply wiring: Provide 24V DC power supply to ensure correct polarity. Shenkong Wa signal output: supports 4-20mA current signal or pulse signal output, and needs to be configured according to system requirements. Parameter setting: Set parameters such as range, unit, alarm threshold, etc. through instrument buttons or upper computer software. After the operation process is powered on, the instrument self checks and displays "READY" indicating normal operation. Input fluid parameters (density deficit, viscosity, etc.) for compensation calculation. Real time monitoring of traffic data, supporting local display or remote transmission.III. Common faults and solutions Fault phenomenon 1:
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