Trace gas flow meter with adjustable resolution ratio

Abstract

The invention relates to the technical field of gas flow measuring and particularly discloses a trace gas flow meter with an adjustable resolution ratio. The trace gas flow meter comprises a closed container, a gas inlet pipe, a gas outlet pipe, a liquid medium, a center pivot, a balance tank, a gravity regulator, a first cavity gas collection unit, a second cavity gas collection unit and a counter. The balance tank is arranged in the liquid medium in the closed container through the center pivot, the gravity regulator is arranged in the balance tank and can freely slide along the balance tank, the first cavity gas collection unit and the second cavity gas collection unit are connected to be inverted on the lower side of the balance tank and located on the two sides of the center pivot respectively, a gas inlet of the gas inlet pipe is located below the joint of the first cavity gas collection unit and the second cavity gas collection unit, and the counter is connected with the center pivot. Lifting force can be adjusted so as to change the resolution ratio of a measuring unit to adapt to measurement in different gas flow ranges. Meanwhile, gas leakage in the measuring process can be avoided to guarantee measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of gas flow measurement, in particular to a micro gas flowmeter with adjustable resolution based on the principle of gas-liquid replacement. Background technique [0002] Flow meters for measuring accumulated gas are widely available, but most of the current gas flow meters cannot record the production of accumulated gas, and the other part is complicated in design. These gas flowmeters usually have the following disadvantages: poor adjustability, not well adapted to tests under different conditions; gas leakage during gas measurement, resulting in underestimation of measurement results; high requirements for liquid media, frequent replacement of liquid medium. The use of micro flow meters designed by the principle of buoyancy action is relatively common, however, a simple and economical micro flow meter suitable for cumulative gas metering has not been successfully designed using the principle of buoyancy....

AI Technical Summary

Problems solved by technology

[0002] Flow meters for measuring cumulative gas are widely available, but most current gas flow meters cannot record cumulative gas production, and others are complex in design

These gas flowmeters usually have the following disadvantages: poor adjustability, not well adapted to tests under different conditions; gas leakage during gas measurement, resulting in underestimation of measurement results; high requirements for liquid media, frequent replacement of liquid medium

The use of micro flow meters designed by the principle of buoyancy action is relatively common, however, a simple and economical micro flow meter suitable for cumulative gas metering has not been successfully designed using the principle of buoyancy

Images