Metering a flow of a fluid through a cylindrical tube section

A technology for measuring device and fluid flow, applied in the direction of measuring device, liquid/fluid solid measurement, measuring flow/mass flow, etc. Avoid distracting and disruptive effects
CN104101385AActive Publication Date: 2014-10-15NANJING YOUYANG CONTROL TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING YOUYANG CONTROL TECH
Publication Date
2014-10-15

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Abstract

The invention discloses a fluid flow metering apparatus which comprises a metering pipe, a throttling element, a support element and a signal processing unit. The throttling element is a streamline body and has a cylindrical tube section with equal diameters. The throttling element is fixed inside the metering pipe through the support element and coaxial to the metering pipe. An annular flow channel is formed between the cylindrical tube section of the throttling element and the metering pipe. The front of the throttling element is provided with high-pressure taps. Low pressure taps are arranged inside the annular flow channel. At least one low pressure tap is located on the outer wall of the throttling element. The signal processing unit comprises a signal processor, a pressure difference sensor and at least two pressure sensors. The signal processing unit is used for acquiring the pressure difference among the high pressure taps and the low pressure taps, or respectively acquiring the pressure values of the low pressure taps and the high pressure taps so as to transmit the values to a signal processor. The signal processor calculates the flow of a fluid according to the received pressure difference or the pressure signals. The metering results are more accurate. Interference and damage during a data transmission process can be further prevented.
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Description

technical field

[0001] The invention relates to the technical field of fluid flow measurement, in particular to a fluid flow measurement device. Background technique

[0002] In the prior art, the patent CN2736741 discloses a differential pressure flowmeter. The flow measurement system includes a roughly drop-shaped throttling piece, and measures The pipe wall is connected; the throttling piece is coaxial with the measuring tube, and there is a cylindrical straight pipe section in the middle; thus, an equal-width annular flow channel is formed between the straight pipe section of the throttling piece and the inner wall of the measuring tube, and the fluid flows in the When flowing through the annular flow channel under the action of internal pressure, the speed will increase and the flow will be adjusted to a very stable state. This flow regime is manifested without any flow separation or vortices at the front, middle and rear of the throttle.

[0003] However, the above-m...

Claims

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