Ultrasonic metering device

A metering device and ultrasonic technology, applied in the field of metering meters, can solve the problems of the influence of measurement accuracy, the accumulation of pollutants in the fluid flow channel, and the influence of the measurement accuracy of ultrasonic meters, so as to improve the measurement accuracy, high measurement accuracy, and increase the flight time difference. Effect

Pending Publication Date: 2018-11-23
GOLDCARD HIGH TECH
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Problems solved by technology

In addition, since the domestic natural gas medium contains pollutants such as fine particles, dust and dust, the inner wall of the fluid flow channel will accumulate pollutants after long-term use, which will affect the measurement accuracy. The arc groove, the arc groove has the function of gathering waves, so

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  • Ultrasonic metering device

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[0030] The technical solutions of the embodiments of the present invention will be explained and described below in conjunction with the accompanying drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the examples in the implementation manners, other examples obtained by those skilled in the art without making creative efforts all belong to the protection scope of the present invention.

[0031] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientations or positional relationships indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing t...

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Abstract

The invention discloses an ultrasonic metering device, belongs to the technical field of meter, and solves the problem that an existing ultrasonic metering device cannot meet measurement accuracy requirement of small flows such as flow of a household gas meter. The ultrasonic metering device comprises a casing and a transducer arranged on the casing, wherein the casing is provided with a meteringpassage for fluid to pass through, and the casing forms an inflow section and a measuring section along the fluid flow direction. The transducer comprises a transmitting vibrator and a receiving vibrator, and the transmitting vibrator and the receiving vibrator are mounted on the same side of the measuring section, so that the propagation path of the ultrasonic wave is V-shaped. The flow area of the inflow section is S1, and the flow area of the measuring section is S2, wherein S2 is less than S1, so that the surface velocity of the fluid flowing through the measuring section and the flight time difference during the ultrasonic measurement is increased, thereby improving the measuring accuracy. The device particularly satisfies the measurement accuracy requirements of small flows.

Description

【Technical field】 [0001] The invention relates to the technical field of measuring meters, in particular to an ultrasonic measuring device in an ultrasonic measuring meter. 【Background technique】 [0002] Ultrasonic meters have been widely used as a speed meter for household natural gas metering. This kind of gas meter measures the fluid flow velocity through the flight time difference between the downstream flight time and the countercurrent flight time of ultrasonic waves in the fluid, and then obtains the fluid flow rate. . According to such a measurement principle, for the characteristics of the small flow rate of the domestic gas meter, increasing the time-of-flight difference when the small flow rate is measured will help improve the measurement accuracy of the small flow rate of the domestic gas meter. In addition, since the domestic natural gas medium contains pollutants such as fine particles, dust and dust, the inner wall of the fluid flow channel will accumulate ...

Claims

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Application Information

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IPC IPC(8): G01F1/66
CPCG01F1/662
Inventor 陈红聂西利郭刚丁渊明
Owner GOLDCARD HIGH TECH
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