Opposite type small-bore ultrasonic flowmeter

Abstract

The invention discloses a small-bore opposite type ultrasonic flowmeter. The small-bore opposite type ultrasonic flowmeter comprises a circuit box, a pipe section outer layer, a pipe section inner layer and transducer assemblies, wherein the circuit box is arranged on the pipe section outer layer; the pipe section inner layer is integrally formed by injection molding; a transducer mounting seat is formed at an end of the pipe section inner layer; the transducer assemblies are mounted in the mounting seat; the two pairs of transducer assemblies are arranged in pairs; and the pipe section inner layer is mounted in the pipe section outer layer. According to the ultrasonic flowmeter, ultrasonic waves are oppositely transmitted and received, energy loss is low, the pipe section outer layer can be a standard pipe fitting, and therefore, the costs are reduced. By the design of small step-free transducers, the problem that transducers cannot be mounted in small-diameter pipes is solved, pressure loss is reduced, water flows smoothly, and metering is accurate. The pipe section inner layer is assembled conveniently and quickly, is positioned accurately and is good in sealing. A whole cavity does not have water, transducer connecting lines are effectively prevented from being soaked in water, retractable space for deformation of the pipe section inner layer and tiny expansion caused by the reason that water is changed into ice is provided, and freezing is prevented effectively.

Description

technical field [0001] The invention belongs to the technical field of pipeline transmission fluid flow measurement, and in particular relates to a through-beam small-diameter ultrasonic flowmeter. Background technique [0002] Compared with traditional mechanical flowmeters and electromagnetic flowmeters, ultrasonic flowmeters have high measurement accuracy and a larger range ratio, and are more adaptable to changes in the temperature, pressure, density and other parameters of the measured fluid. , Vertical adaptability, easy to use, easy to digital management and other advantages. At present, ultrasonic flowmeters have been widely used in flow measurement fields such as municipal heating, water affairs, industry, mines, and power plants, and the technology is becoming increasingly mature. [0003] However, for small-diameter pipes, due to the small diameter of the pipe itself, it is a technical problem for the transducer to be installed in such a small-diameter channel fo...

AI Technical Summary

Problems solved by technology

Due to the use of plastic materials, the deformation of the plastic pipe section is large due to the influence of temperature, which will inevitably affect the accurate positioning of the transducer, and thus the stability of flow measurement

At the same time, the processing method of segmented processing and fastening with bolts is complicated, and the disassembly process is complicated

When the plastic pipe section is connected with the union, the thread strength is poor, it is easy to be damaged, and the installation is not reliable

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