Gas flowmeter and application method thereof

A gas flow meter and airflow direction technology, which is applied to the volume/mass flow rate generated by mechanical effects, and the direction of fluid flow detection by measuring differential pressure.

Active Publication Date: 2013-11-20
SHAANXI TIANYI INTELLIGENT INSTR
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Disadvantages of membrane gas meters: large volume, difficult installation; complex structure, high failure rate; limited transmission membrane strength, unable to withstand high pressure; no temperature and pressure compensation, so the accuracy is low

Method used

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  • Gas flowmeter and application method thereof
  • Gas flowmeter and application method thereof
  • Gas flowmeter and application method thereof

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Embodiment Construction

[0029] The working principle of the gas flow meter of the present invention is as follows: figure 1 Shown: The gas to be measured flows through the flowmeter, first passes through the diversion filter element, filters out the impurities in the gas, and rectifies the airflow to make the flow stable. When the air flow passes through the laminar flow generating body, due to the frictional resistance, pressure loss occurs at both ends of it. When the Reynolds number of the fluid flow is less than 2300, the pressure loss is proportional to the gas flow rate. which is

[0030] Flow rate formula: v - = c μ · ΔP

[0031] In the formula: - the average velocity of the fluid;

[0032] ΔP - the pressure difference at both ends of the laminar flow generator;

[0033] μ - dynamic viscosity of fluid medium

[0034] c—Constants related to geometrical dimensions.

[0035] Flow f...

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Abstract

The invention provides a gas flowmeter. The gas flowmeter comprises a flow guide filter element and a laminar flow generator, wherein the flow guide filter element and the laminar flow generator are sequentially arranged inside a tubular shell in the direction of a gas flow, and a differential pressure transducer and a data processing unit are arranged outside the tubular shell; the side wall of the tubular shell is provided with two pressure taking channels in the radial direction, the two pressure taking channels correspond to two sensing ends of the differential pressure transducer, and the two pressure taking channels are located in front of and behind the laminar flow generator; the main body of the laminar flow generator is multi-micropore channels, the section of each multi-micropore channel is in a grid shape, all the multi-micropore channels are parallel to one another and mutually insulated, so that the gas flow to be measured passes through the laminar flow generator in a laminar flow state. The gas flowmeter has the advantages of being small in size, stable in work and high in metering accuracy.

Description

technical field [0001] The invention relates to a gas flow metering device. Background technique [0002] Currently in the market for natural gas trade settlement, the mainstream flow meter for medium and small flow measurement is membrane gas meter. [0003] Disadvantages of diaphragm gas meters: large volume, difficult installation; complex structure, high failure rate; limited transmission membrane strength, unable to withstand high pressure; no temperature and pressure compensation, so the accuracy is low. Contents of the invention [0004] The invention provides a gas flowmeter with small volume, stable operation and high measurement accuracy. [0005] The scheme of the present invention is as follows: [0006] A gas flow meter, comprising a flow guide filter element and a laminar flow generating body arranged in sequence along the airflow direction in a tubular housing, a differential pressure sensor and a data processing unit are installed outside the tubular hous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/36
Inventor 张瑜张驾翔
Owner SHAANXI TIANYI INTELLIGENT INSTR
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