An ultrasonic liquid flow measurement device

Abstract

The invention discloses an ultrasonic liquid flow measurement device, belongs to the technical field of liquid flow defection and aims at providing the ultrasonic liquid flow measurement device which can change the reflection and diffraction propagation directions of divergent waves surrounding a main beam and decrease the absorption amount of the divergent waves by an ultrasonic probe, can pile up a certain amount of sediments, cannot generate diffuse reflection, and thus can greatly improve the liquid flow measurement accuracy. The ultrasonic liquid flow measurement device comprises a straight measuring tube and an ultrasonic emission receiver, wherein the left probe of the ultrasonic emission receiver is fixed at the inner left end of the straight measuring tube, and the right probe of the ultrasonic emission receiver is fixed at the inner right end of the straight measuring tube; an isosceles triangle-shaped thread is formed in the inner wall, between the two ends, of the straight measuring tube. The ultrasonic liquid flow measurement device is mainly used in a liquid flow defection technology.

Description

technical field [0001] The invention relates to the technical field of liquid flow detection, in particular to an ultrasonic liquid flow measurement device. Background technique [0002] At present, in the ultrasonic liquid flow measurement device at the heating user port, the inner wall surface of the measuring straight pipe is a smooth surface, such as figure 2 As shown, at the front and rear ends of the measuring straight pipe, there is an ultrasonic probe of an ultrasonic transmitting receiver, and the ultrasonic probes of the two ultrasonic transmitting and receiving receivers are arranged axially opposite each other in the measuring straight pipe, separated by A specified distance, while transmitting and receiving each other's ultrasonic main sound beam. The ultrasonic main sound beam emitted by one probe passes through the axial direction of the measuring straight pipe and arrives at the other probe for reception. There is a time difference between the forward and co...

AI Technical Summary

Problems solved by technology

The unfavorable technical problems of the ultrasonic flow measuring device with this shape and structure are: First, because there are still a small amount of divergent waves around the main sound beam emitted by one of the ultrasonic probes, and they are emitted forward in the shape of a truncated cone, these divergent waves It is inevitable that some parts will be shot on the smooth inner wall of the lumen, and will be absorbed by another ultrasonic probe on the opposite side after reflection and diffraction, and the sound path of these two-way divergent waves is the same as that of the main sound beam. The sound path is different, the divergent wave and the main sound beam have an impact on the measurement of the time difference, so the divergent wave will affect the measurement accuracy of the liquid flow

The second is that some impurities are unavoidable in the heating water, which will deposit on the inner wall of the measuring straight tube after a long time, which will change the "O"-shaped lumen into a "D"-shaped lumen, although The amount of change from the "O"-shaped lumen to the "D"-shaped lumen is very small, but the reflected wave or diffracted wave generated by the divergent wave passing through the impurity deposit will be different from the wave pattern set by the previous debugging. In addition, the inner wall of the measuring straight pipe is a smooth surface, there will be differences in the smoothness of the inner wall of the measuring straight pipe, and the reflection will be changed into diffuse reflection, which will affect the accuracy of the measuring instrument

The disadvantage of this ultrasonic measurement method of liquid flow is that there are a large number of bidirectional divergent waves around the main sound beams of the two ultrasonic probes, which will affect the measurement accuracy of liquid flow

The second is that impurities in the water will deposit on the inner wall of the lower lumen of the measuring straight tube after a long time, so that the O-shaped lumen becomes a D-shaped lumen, and the reflected wave or diffraction generated by the divergent wave passing through the D-shaped lumen Wave, and the reflected wave or diffracted wave generated by the divergent wave passing through the O-shaped lumen will have a different wave pattern after debugging. In addition, the inner wall of the measuring straight tube is a smooth surface, and the smoothness of the inner wall of the measuring straight tube will appear. The difference, turning reflection into diffuse reflection, these will affect the accuracy of the measuring instrument

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