Gas ultrasonic flowmeter with full-zero-section detection flow channel structure and detection method thereof

Abstract

The invention relates to a gas ultrasonic flowmeter with a full-zero-section detection flow channel structure and a detection method thereof. The gas ultrasonic flowmeter comprises a gas flow channelwith a circular section; at least two pairs of sound channels are arranged on the gas flow channel; an ultrasonic transducer assembly is arranged in each sound channel, each pair of two ultrasonic transducer assemblies alternately transmit and receive ultrasonic waves, the transmitted ultrasonic waves are reflected twice by a pipe wall in the gas flow channel and then are received by the other ultrasonic transducer assembly of the pair, and the projection of the path of the ultrasonic waves on the radial cross section of the gas flow channel is triangular. Since the projection of the ultrasonic path on the radial cross section of the gas flow channel is triangular and can cover the gas flow in the whole pipeline, the gas flow rate in the pipeline can be uniformly detected, the influence ofthe eddy current on the measurement precision is greatly reduced, and the precision and stability of the flowmeter are improved; and at least two pairs of sound channels are staggered in a circumferential direction, so that the linearity, the flow range and the precision of the flowmeter are further improved.

Description

technical field [0001] The invention relates to a gas ultrasonic flowmeter with a full zero cross-section for detecting the structure of a flow channel and a detection method thereof. Background technique [0002] With the full development of my country's west-to-east gas pipeline, natural gas is widely used as urban civil gas. When measuring natural gas trade, traditional gas meters have disadvantages such as low measurement accuracy, small flow range, many moving parts, and short service life. The less applicable gas trade settlement. [0003] The channel path of traditional ultrasonic flowmeters is mainly arranged in parallel or crossed, with low measurement accuracy (level 1.5) and small flow range (currently 10-100m in the market) 3 / h). Contents of the invention [0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a gas ultrasonic flowmeter with a full zero-section detection channel structure and a detection method...

AI Technical Summary

Problems solved by technology

[0002] With the full development of my country's west-to-east gas pipeline, natural gas is widely used as urban civil gas. When measuring natural gas trade, traditional gas meters have disadvantages such as low measurement accuracy, small flow range, many moving parts, and short service life. The less applicable to gas trade settlement

[0003] The channel path of traditional ultrasonic flowmeters is mainly arranged in parallel or crossed, with low measurement accuracy (level 1.5) and small flow range (currently 10-100m in the market) 3 / h)

Images