Installation requirements for ultrasonic flow meters

Abstract: The information on the installation requirements of ultrasonic flowmeters is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Shengshiyuan ultrasonic flowmeter is a kind of flow detection instrument based on the principle of velocity difference method, which has certain applications in many industries. We need to master the installation method when installing the ultrasonic flowmeter. If the installation is wrong, it will not only cause ultrasonic waves. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the installation requirements of ultrasonic flowmeters. Ultrasonic flowmeter is a kind of flow detection instrument based on the principle of velocity difference method, which has certain applications in many industries. When installing the ultrasonic flowmeter, we need to master the installation method. If the installation is wrong, it will not only cause damage to the ultrasonic flowmeter, but also cause certain failures. So what is the specific method? (1) Detailed understanding of the site situation The ultrasonic flowmeter should understand the site situation before installation, including: 1. How far is the distance from the host where the sensor is installed; 2. Pipe material, pipe wall thickness and pipe diameter 3. Pipeline age; 4. Fluid type, whether it contains impurities, air bubbles and whether the pipe is full; 5. Fluid temperature; 6. Whether there are interference sources (such as frequency conversion, strong magnetic field, etc.) at the installation site; 8. Whether the power supply voltage used is stable; 9. Whether remote transmission signals and types are required; (2) Selecting the installation location and selecting the installation pipe section has a great influence on the test accuracy, and the selected pipe section should avoid interference and eddy current. In the case where the accuracy is greatly affected, the selection of pipe sections should generally meet the following conditions: 1. Avoid installing the machine in places with water pumps, high-power radios, and frequency conversion, that is, where there are strong magnetic fields and vibration interference; 2. The selection of pipes should be uniform and dense, and easy to ultrasonic transmission. Pipe section; 3. There must be a long enough straight pipe section, the upstream straight pipe section of the installation point must be greater than 10D (Note: D = diameter), and the downstream must be greater than 5D; 4. The upstream of the installation point should be 30D away from the pump; 5. The fluid should be Fill the pipeline; 6. There should be enough space around the pipeline for the on-site personnel to operate, and the underground pipeline needs to be a test well. The test well is as follows: (3) Determine the probe installation method There are generally two probe installation methods for ultrasonic flowmeters, namely Z method and V method. However, when D< 200mm and the site situation is one of the following conditions, the Z method can also be used for installation: 1. When the turbidity of the fluid to be measured is high, the signal cannot be received or the signal is very weak when measured by the V method; 2. When the inner wall of the pipeline is lined ;3. When the service life of the pipeline is too long and the inner wall is seriously fouled; for those with better pipeline conditions, even if D is slightly larger than 200mm, in order to improve the measurement accuracy, the V method can be used for installation. (4) Obtain the installation distance and determine the probe position 1. Enter the pipeline parameters into the instrument, select the probe installation method, and obtain the installation distance; 2. For horizontal pipelines, generally choose the middle of the pipeline, avoiding the top and bottom (top and bottom). There may be air bubbles, and there may be precipitation at the bottom); 3. V method installation: first determine a point, and measure another point at the horizontal position according to the installation distance. Z method installation: first determine a point, measure another point at the horizontal position according to the installation distance, and then measure the symmetrical point of this point on the other side of the pipe. (5) After the position of the probe is determined by the surface treatment of the pipeline, at the two installation points±Within 100mm, use tools such as angle grinder, file, sandpaper, etc. to polish the pipe to be bright, smooth and free of corrosion pits. Requirements: The gloss is uniform, without undulations, and the hand feels smooth and round. Special attention should be paid to the fact that the grinding point should have the same radian as the original pipe. Do not grind the installation point to a flat surface, and wipe the area with alcohol or gasoline, so as to facilitate the bonding of the probe. (6) Wiring between the probe and the instrument (7) Fine-tuning the position of the probe After connecting the wires, fill the probe with silica gel, leave it for half an hour, and then use silica gel and a clamp to fix the probe to the polished pipe (pay attention to the direction of the probe, the lead wire If you find it is not good, adjust the probe position slightly until the signal of the instrument reaches the specified range: (Signal strength: generally should be greater than 6.5, a few can be based on The specific situation of the site will be determined separately.) (Transmission time ratio: at 100±Within the range of 3, this value must be stable. ) (8) Fix the probe After the instrument signal is adjusted, use the provided fixture to fix the probe. Be careful not to tilt the wire rope, so as not to pull the probe and make the probe move, and then use silica gel to seal the circumference of the probe in contact with the pipeline. It takes about a day for the glue to solidify, and it is necessary to pay attention to the waterproofing of the probe before it is dry. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Installation Requirements for Ultrasonic Flow Meters'
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