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『Doppler open channel sewage flowmeter』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
1. Measurement Method of Sewage Flow Meter
1. Measurement Principle of Insertion Doppler Ultrasonic Flow Meter When the sewage contains a lot of sediment or bubbles and flows in a full pipe state, this principle is suitable for use. Because if an electromagnetic flowmeter is used, it will operate well in the first few years, but the reading will gradually decrease after a few years. This is mainly because the sewage is relatively dirty and contains a large amount of viscous dirt, which will stick to the electrode during long-term operation, resulting in a decrease in electrode sensitivity and the electromagnetic flowmeter cannot work normally. If the external clamping ultrasonic principle is used, the measurement effect will also be affected due to poor sound transmission performance of the pipe wall, adhesion of dirt on the inner wall, and contamination of the coupling agent by sensor immersion. By using the insertion Doppler principle, the above problems can be effectively solved. When the installation location is underground or immersed in the front platform, please choose a plug-in sensor with a protection rating of IP68. If the pipe wall is made of cast iron, cement pipe, PVC pipe, corrugated pipe, etc., a clamp can also be added to ensure stable and reliable installation and operation. 2. The measurement principle of the plug-in time difference ultrasonic flowmeter is suitable when the sewage is relatively clear, without too many impurities or bubbles, and is flowing in a full pipe state. Reason as above
3. Weir type ultrasonic liquid level measurement principle If the sewage flows through an open ditch, a suitable weir can be constructed to measure the liquid level with an ultrasonic liquid level
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4. Open channel measurement principle adopts the area and flow rate method, and an integrated sensor of liquid level and flow rate is used to measure both liquid level and flow rate. The accumulator then calculates the flow rate based on the cross-sectional shape, flow rate, and liquid level information
5. Electromagnetic flowmeter measurement principle. If the sewage does not pollute or adhere to electrodes, this method can be used, but caution should be exercised.
.2.21. What are the commonly used sewage flow measurement devices? What are the advantages and disadvantages of each?
There is a Doppler ultrasonic flowmeter, and if possible, there is also an ultrasonic open channel flowmeter; If it is a metal pipeline with a large diameter and cannot be modified, a portable ultrasonic flowmeter (with two transducers on the outer wall of the pipeline) can be used with a cover, which is easy and convenient to install. The disadvantage is that the highest accuracy is only 1%, and the pipeline needs to be filled with medium. If the flowmeter performance is poor, the measurement accuracy will vary greatly. If we can discuss the purchase of embedded ultrasonic flow meters for Qinao Construction, we can ensure accuracy and lifespan. If conditions permit the construction of open channel flow meters, the accuracy can be stably guaranteed at 2%. However, the disadvantage is that professional open channel manufacturers are required for construction, and if the sewage has an odor, it is also very environmentally unfriendly. Choose according to your actual situation