Bundled ultrasonic flowmeter

Bundled ultrasonic flowmeter I don’t know if you have heard of it. In fact, in the industry, we call it more clamp-on ultrasonic flowmeter. The working principle of the bundled ultrasonic flowmeter is as follows: 　　 is generally measured by the time difference method, that is: when the ultrasonic beam of the bundled ultrasonic flowmeter propagates in the liquid, due to the flow of the fluid, the propagation time of the ultrasonic wave in the forward and backward directions will be small The difference, this tiny difference in propagation time is proportional to the flow rate of the liquid, so that the flow rate of the fluid is measured. The advantages of the bundled ultrasonic flowmeter: 　　1, because the bundled ultrasonic flowmeter is bundled on the outside of the pipeline, it does not damage the fluid in the pipeline, does not affect the process flow, and can be disassembled at any time;　　2, because the bundled ultrasonic flowmeter is bundled on the outside of the pipeline, There is no pressure problem; 　　3, the bundled ultrasonic flowmeter does not contact the medium, ignores the corrosiveness of the medium, and has a wide range of measurement media; 　　4, the bundled ultrasonic flowmeter is much cheaper than the large-diameter pipeline flowmeter; 　　bundle Disadvantages of type ultrasonic flowmeter: 　　1, the bundled ultrasonic flowmeter cannot withstand high temperature, generally not higher than 160 degrees; 　　2, the small diameter (below DN15) bundled ultrasonic flowmeter cannot be installed and measured; 　　3, relative to the pipe segment type and the plug-in type Ultrasonic flowmeters, bundled ultrasonic flowmeters, because the signal needs to pass through the pipe wall, the accuracy of bundled ultrasonic flowmeters are related to signal strength, quality, pipe material, installation specifications, etc., causing errors for bundled ultrasonic flowmeters The factors will be more.　　Bundled ultrasonic flowmeter processing installation point 　　Bundled ultrasonic flowmeter clamp-on sensor installation points have two, divided into upstream sensor and downstream sensor. When dealing with these two bundled ultrasonic flowmeter installation points, the processing area of u200bu200bone bundled ultrasonic flowmeter installation point should be about the size of the sensor, and the processing area of u200bu200bthe other bundled ultrasonic flowmeter installation point should be the size of the sensor. About 2 times (centered at the installation point) to facilitate the debugging signal of the bundled ultrasonic flowmeter. First, clean the area outside the tube where the sensor is to be installed, and remove the rust and paint. If there is an anti-rust layer, it should also be removed. It is best to use a grinder to polish the metallic luster, and then use a clean cloth to wipe off the oil and dust. Fixing the bundled ultrasonic flowmeter sensor on the signal generating body of the bundled ultrasonic flowmeter sensor, smear 2~3mm thick couplant, and then stick the bundled ultrasonic flowmeter sensor tightly on the pipe wall. Note The emission direction of the bundled ultrasonic flowmeter sensor must be correct, and there must be no air or gravel between the bundled ultrasonic flowmeter sensor and the pipe wall. The bundled ultrasonic flowmeter sensor is positioned and fastened with a cloth tape or tensioner. Debugging of the bundled ultrasonic flowmeter sensor Apply a 4~5mm thick couplant to the center of the installation point with a larger processing area (coupling agent is used to isolate the air on the surface of the sensor and the pipe surface, and reduce the difference in ultrasonic waves. The loss during propagation in the medium), and then stick the bundled ultrasonic flowmeter sensor close to the pipe wall. Pay attention to the correct emission direction of the sensor. There should be no air and sand between the bundled ultrasonic flowmeter sensor and the pipe wall. Taking the center point as a reference, first move the sensor slightly in the horizontal direction to find the maximum value of signal strength and Q value, and then move the sensor slightly in the vertical direction to find the maximum value of signal strength and Q value. Then slightly adjust the emission angle of the bundled ultrasonic flowmeter sensor to find the maximum value of signal strength and Q value. At this time, the sensor of the bundled ultrasonic flowmeter can be positioned.　　 Note: 　　 1. The cleaner the pipe surface treatment may make the signal strength and Q value of the bundled ultrasonic flowmeter higher.　　 2. The pipe area where the bundled ultrasonic flowmeter sensor is installed must be cleaned up during installation to expose the original luster of the metal. Coupling agent should be applied around the contact part of the sensor and the pipeline to prevent air, sand or rust from entering and affecting the ultrasonic signal transmission.　　Bundled ultrasonic flowmeter is the most widely used type of ultrasonic flowmeter because of its feature that it does not need to be broken. The installation and use of the bundled ultrasonic flowmeter is also very simple and easy to understand. After the editor talked about so many dry goods knowledge points, do you have any plans to buy a bundled ultrasonic flowmeter and come back for a try? You can contact the professional manufacturer of bundled ultrasonic flowmeter-Kaidi Sensing Automation Co., Ltd. for further communication .

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