What problems should be paid attention to when choosing an ultrasonic flowmeter
In recent years, many new types of ultrasonic flowmeters have appeared, and they have become more and more widely used in petrochemical, pharmaceutical, environmental protection and other fields, becoming one of the primary types of new flowmeters. Because it measures the flow in a non-contact method, it has a useful solution to the conditions of strong corrosion, radioactivity, blockage, viscosity, medium requiring small pressure loss, no leakage, bubbles, particles, etc.
Regarding the clamp-on ultrasonic flowmeter, because the pipe size has nothing to do with the price, it is widely used in the measurement of large pipeline and large flow. The principle and measurement method of ultrasonic flowmeter The ultrasonic flowmeter is based on the information of the fluid flow rate when the ultrasonic wave is transmitted in the moving fluid, such as the transmission speed of the forward flow and the reverse flow is different because of the superposition of the fluid flow rate.
Therefore, the flow rate of the fluid can be detected through the received ultrasonic waves, and then converted into a flow rate. Ultrasonic flowmeter consists of three parts: ultrasonic transducer, electronic circuit and flow display and accumulation system. The ultrasonic transmitting transducer converts electrical energy into ultrasonic energy and transmits it into the fluid to be measured. The ultrasonic signal received by the receiver is expanded and converted into an electrical signal representing the flow through the electronic circuit. and accumulative. This completes the detection and display of traffic.
The selection and installation of ultrasonic flowmeters must consider the influence of the following factors: full pipe, steady flow, scaling, temperature, pressure, disturbance, etc. Full pipe: Select pipe sections that are filled with fluid evenly and densely and are easy to transmit ultrasonic waves, such as straight pipe sections (fluid moves upward) or horizontal pipe sections. Steady flow: The installation interval should select a straight pipe section that is more than 10 times the straight pipe diameter upstream and more than 5 times the straight pipe diameter downstream without any elbows, variable diameters, etc., and the installation should be away from valves, pumps, high-voltage electricity and frequency conversion. Disturbance source such as the device.
In recent years, many new types of ultrasonic flowmeters have appeared, and they have become more and more widely used in petrochemical, pharmaceutical, environmental protection and other fields, becoming one of the primary types of new flowmeters. Because it measures the flow in a non-contact method, it has a useful solution to the conditions of strong corrosion, radioactivity, blockage, viscosity, medium requiring small pressure loss, no leakage, bubbles, particles, etc.
