A probe of an ultrasonic flowmeter and an ultrasonic flowmeter including the probe

Abstract

The invention relates to an ultrasonic flowmeter probe. The probe comprises a rotatable rotation block provided with a piezoelectric crystal plate for transmitting or receiving ultrasound. By rotating the rotation block to make the rotation block pause at different locations in pipes with different pipe diameters, an incidence angle of a sound wave of the piezoelectric crystal plate is adjusted. The invention also provides an ultrasonic flowmeter which includes two of the ultrasonic flowmeter probes. While being used in flowmeters with different pipe diameters to measure, by rotating the rotation block to adjust the angle of the piezoelectric crystal plate, the ultrasonic flowmeter probe can achieve the effect that a downstream probe can receive a signal transmitted from an upstream probe and the upstream probe is also capable of receiving a signal transmitted from the downstream probe, conduct flow measurement of liquid in different pipe diameters under a condition of constant spacing, and make a same pair of fixed ultrasonic flowmeter probes be in common use within different pipe diameter ranges, thereby extremely improving convenience and universality of application of ultrasonic probes.

Description

technical field [0001] The invention relates to the field of ultrasonic measurement, in particular to a probe of an ultrasonic flowmeter and an ultrasonic flowmeter including the probe. Background technique [0002] Ultrasonic measurement plays an extremely important role in the current field of liquid measurement, which is unmatched by other measurement methods. It adopts advanced multi-pulse technology, signal digital processing technology and error correction technology to make flow measurement more adaptable to the environment of industrial sites, and the measurement is more convenient, economical and accurate. It can be widely used in petroleum, chemical industry, metallurgy, electric power, water supply and drainage and other fields. [0003] Ultrasonic flowmeters in the prior art include clamp-on and plug-in types. figure 2 It is a schematic diagram of the installation method of the external clamping V-type clamping ultrasonic flowmeter in the prior art, image 3 I...

AI Technical Summary

Problems solved by technology

[0022] The angle of the piezoelectric chip in the ultrasonic probe of the prior art is fixed and non-adjustable, which leads to the fixed incident angle of the ultrasonic signals of the two probes in the ultrasonic flowmeter, which in turn leads to the need to adjust the probe during the measurement process. The spacing can be applied to the measurement of different pipe diameter flow, such as Figure 4 or Figure 5 shown

However, if the angle of the probe remains unchanged and the distance between the probes remains unchanged, the measurable pipe diameter of the ultrasonic flowmeter will be unique, which will greatly increase the difficulty and limitations of measurement.

[0023] The current ultrasonic flow measurement is divided into general-purpose and fixed-type. The general-purpose ultrasonic measurement usually needs to input various parameters of the pipe diameter and adjust the distance between the probes. The process is relatively cumbersome and error-prone; the fixed-type measurement is for a specific pipe. The size and material are special, the application range is small, and the restriction is large

Both methods limit the application of ultrasonic measurement to a certain extent

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