The back tension work of dry calibration of sewage flow meter

Abstract: The information on the post-tensioning work of the dry calibration of the sewage flow meter is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. VSF dry calibration is a technical basic work and an industry work. It has both economic value and broad social significance, and will make an important contribution to the development of VSF. Although domestic and foreign research and face testing work has been carried out for more than ten years, domestic research has been carried out. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. VSF dry calibration is a technical basic work and an industry work. It has both economic value and broad social significance, and will make an important contribution to the development of VSF. Although the domestic and foreign research and trial work has been carried out for more than ten years and has been suspended in China, Japan has never stopped this work, and has obtained exciting results through hard work, but in general, with the festival Compared with the flow device, there is still a lot of work to be done. The Japanese counterparts have identified the triangular-shaped generator as the standard generator, because this generator has been familiar to the majority of manufacturers and users, and has the most agricultural generation. This is also expected. There are dozens of series of VSF in Kunhua, and there are at least more than ten kinds of generators. The most representative ones are at least five kinds. These generators are related to different detection components. It has formed a rich and colorful product group, so it is obviously not enough to have only one standard product. Even if the same triangle often occurs, there are still many deformed products. For example, the Caichuan side-checking method ② (see Section 2, Section 4 of the wooden chapter) is based on opening pressure holes on both sides of the triangular column generating body, introducing the pressure difference into the side basin holes, and acting on the side-checking elements. Then the two sides of the generating body are guided After the hole is pressed, how much does it affect the St position? How can this effect be corrected? Another example is the stress VSF. At present, most manufacturers put the side inspection components in the downstream area of ​​the triangle, that is, the second part of this chapter is used. The gun test method in section ⑤. In the test, it was found that the distance between the detection side element and the generating body, the depth of the detection side element and the size of the detection side element itself are different, even if the generating body of the same shape and size, the St value, linearity, maximum range of the side. The range is quite different. How to correct this effect? ​​From this point of view, there is still a lot of research work on dry calibration. In recent years, many manufacturers have developed double-generating VSF. The vortex signal quality, lower limit of mileage, pressure loss, etc. of this instrument are more characteristic than single generators. The dry calibration of the dual-generator VSF also needs to be practiced by all parties. The domestic VSF dry calibration research and test work started not too late, and staged results have also been achieved. This chapter takes the triangular column generator as an example to introduce the face test design of dry calibration, the face test method, the mathematical model of Strouhal number St, the regression model of linearity, the sensitivity analysis of the influence of various geometric parameters on St, and the geometric parameters. Processing, assembly tolerance control, linearity G, forecasting and so on. These works were done in the late 20th century, but this coincides with the ideas of the Japanese counterparts. I believe it will also have a certain reference value for the counterparts who will be engaged in this work in the future. In short, the VSF dry calibration work has a long way to go. It is up to all parties to work hard to do this meaningful work well, and it will definitely reach the level of standard throttling devices. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Post-tensioning work for dry calibration of sewage flow meters'

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