Built-in oblique reflection multichannel ultrasonic flow measurement module and flowmeter

Abstract

The invention discloses a built-in oblique reflection multichannel ultrasonic flow measurement module and a flowmeter, and belongs to the technical field of flow measurement. The measurement module comprises a measurement pipe and ultrasonic transducers communicated with the internal flow channel of the measurement pipe, the measurement pipe is a polygonal prism, and the internal flow channel of the measurement pipe has the same diameter as a measured pipeline; the ultrasonic transducers are mounted on the measuring pipe in pairs, and each pair of ultrasonic transducers reflects sound wave energy through the wall surface of the internal flow channel in an oblique reflection manner; and when gas enters the internal flow channel, the gas flow is determined according to the measured sound wave transmission time by measuring the transmission time between the paired ultrasonic transducers. Through the integrated design of multiple groups of ultrasonic transducers, no detachable part is arranged outside the module. The measuring pipe is a polygonal prism, so that the mounting positions of the transducers are more, and the overall size is reduced. The transducer is arranged on the surfacebody edge surface of the polygonal edge body, and the edge surface is a plane.

Description

technical field [0001] The invention relates to the technical field of flow measurement, in particular to a built-in oblique reflection multi-channel ultrasonic flow measurement module and a flowmeter. Background technique [0002] With the rapid development of ultrasonic flowmeter technology, ultrasonic flowmeters have been widely used in the measurement of gases such as natural gas, petroleum gas and coal gas. Since the ultrasonic wave carries the information of the fluid flow velocity when it propagates in the flowing fluid, the flow velocity of the fluid can be detected by the received ultrasonic wave, and then converted into the flow rate. [0003] At present, ultrasonic flowmeters on the market generally adopt single or multiple sets of ultrasonic transducers installed on both sides of the meter body diameter, and use through-beam sound waves to measure and calculate the flow rate. However, using this method to measure the fluid cross-section is single and the sound p...

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Problems solved by technology

[0006] The built-in multi-channel ultrasonic flowmeter metering module of the above-mentioned patent occupies a large space, is complicated to install, and has low measurement accuracy

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