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What are the types of ultrasonic flow meters? Ultrasonic flowmeter is an instrument that uses ultrasonic technology to measure fluid flow rate. It has the advantages of non-contact, pollution-free, high precision, and high reliability, and is widely used in industrial, environmental protection, water conservancy, petroleum, chemical and other fields. According to different application scenarios and measurement requirements, ultrasonic flow meters can be divided into the following types:
1. Habitual ultrasonic flow meters: Habitual ultrasonic flow meters adopt the single channel measurement principle, and calculate the flow rate and flow chamber turbulence by the time difference of ultrasonic propagation between the transmitter and receiver. It is suitable for general liquid flow measurement, such as tap water, sewage, petroleum, chemical industry, etc.
2. Multi channel ultrasonic flowmeter: Multi channel ultrasonic flowmeter adopts the multi-channel measurement principle, which can simultaneously measure the flow of multiple pipelines and is suitable for parallel flow measurement of multiple pipelines, such as thermal stations, water pump rooms, etc.
3. Portable ultrasonic flowmeter: Portable ultrasonic flowmeter has the characteristics of small volume, light weight, easy operation, etc., suitable for on-site flow measurement and detection, such as water conservancy, environmental protection, petroleum and other fields
4. Gas ultrasonic flowmeter: Gas ultrasonic flowmeter adopts the sound velocity difference method or Doppler effect principle, suitable for gas flow measurement, such as natural gas, coal gas, air, etc.
5 Liquid gas dual-purpose ultrasonic flowmeter: The liquid gas dual-pu
2. What is the installation and positioning distance of the sensor for the ultrasonic flowmeter?
The installation and positioning distance of the sensor for the ultrasonic flowmeter needs to be determined based on the flowmeter type, pipeline parameters, and upstream and downstream pipe conditions. The core is divided into two categories: the requirements for the upstream and downstream straight pipe sections and the installation distance of the sensor itself. The reference requirements for mainstream types are as follows.
.1. Clamp on ultrasonic flowmeter (external universal type) 1 Requirements for upstream and downstream straight pipe sections: Under standard non turbulent flow conditions, the upstream straight pipe section should be ≥ 10 times the inner diameter of the pipeline (10D), and the downstream straight pipe section should be ≥ 5D. If there are turbulence components such as elbows, valves, pumps, etc. upstream, the upstream straight pipe section should be raised to 15D~20D, and the downstream should be maintained at ≥ 5D. If a rectifier is installed inside the pipeline, the upstream and downstream straight pipe sections can be shortened to within 5D. 2. The installation spacing of the sensor itself is divided into three installation methods: Z-type (direct penetration), V-type (one-time reflection), and W-type (two reflectio
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