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Calibration device and method for gas mass flow meter in special working state

A technology of gas mass flow and working status, which is applied in the direction of testing/calibration devices, measuring devices, liquid/fluid solid measurement, etc., and can solve problems such as inability to adapt to calibration

Pending Publication Date: 2020-07-17
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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Problems solved by technology

[0005] The present invention provides a calibration device and method for gas mass flowmeters under special working conditions, which solves the problem that the calibration of existing thermal gas mass flowmeters cannot adapt to the calibration of high pressure, mixed gas and other states

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  • Calibration device and method for gas mass flow meter in special working state
  • Calibration device and method for gas mass flow meter in special working state
  • Calibration device and method for gas mass flow meter in special working state

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Embodiment Construction

[0027] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0028] Existing thermal gas mass flowmeter calibration devices such as figure 1 As shown, the calibration system mainly includes a gas generator 1 with high-purity nitrogen as the gas source, a pressure stabilizing valve 2, a flow regulating valve 3, a flow meter to be tested 4, and a standard device 5, etc. These devices are connected in series in sequence. A pressure stabilizing valve and a flow regulating valve are added to the front end of the thermal gas mass flowmeter, and its inlet pressure is basically normal pressure. In industrial sites, there are many types of gas media actually used, and some are even mixed gases. Thermal gas mass flowmeters may also work under high pressure. For example, iron and steel companies often use argon or argon and carbon dioxide mixed gases. As a gas medium, the i...

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Abstract

The invention belongs to the technical field of flowmeter calibration, and discloses a calibration device for a gas mass flow meter in a special working state. The calibration device comprises a gas generator; the gas generator is communicated with a pressure reducing valve, a detected flow meter and a standard device in series or communicated with the detected flow meter and the standard device in parallel, and calibration of the detected flow meter under the conditions of pressure required by work, different component gases or polluted gases is completed. The invention further discloses a calibration method for the gas mass flow meter in the special working state.

Description

technical field [0001] The invention belongs to the technical field of flowmeter calibration, and in particular relates to a calibration device and method for gas mass flowmeters under special working conditions. Background technique [0002] At present, thermal gas mass flowmeters are widely used in various industrial fields, such as the measurement of the gas consumption of pneumatic control equipment during the operation of nuclear power units, the flow measurement of branch pipes in the smelting site of iron and steel enterprises, and the measurement of combustion air distribution in the energy industry. Measurement, measurement of oxygen and anesthetic flow in medical and health services, measurement of chlorine, ozone, etc. Flow measurement for continuous monitoring systems, etc. Therefore, the calibration of thermal gas mass flow meters is particularly important. [0003] In the laboratory, the thermal gas mass flowmeter is calibrated at normal temperature and press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F25/00
CPCG01F25/00
Inventor 朱碧玉陈超宋进刘夷平李海洋李雪菁马力沈琼
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH
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