A gas weighing device

Abstract

The invention discloses a gas weighing device, which belongs to the technical field of gas flow detection. The gas weighing device includes: a gas weighing tank and a balance. The balance includes: a supporting body, a crossbeam vertically arranged on the upper end of the supporting body, and two hooks arranged at both ends of the crossbeam. The support body includes: an upper support shaft, a pressure regulating member, and a lower support shaft connected sequentially from top to bottom. The pressure regulator is used to adjust the pressure direction of the beam to the lower support shaft to be vertically downward. In addition, the gas weighing device also includes: a narrow tube with a standard cross-sectional area and a length scale marked on the tube wall, an air density measuring instrument and an inflatable part. The narrow tube is used to measure the liquid level of the flowable medium entering the thin tube when the volume of the inner tank changes. The gas weighing device provided by the invention can eliminate the influence of the air buoyancy on the gas quality measurement result of the gas weighing tank, and at the same time avoid the influence of the balance on the gas quality measurement result due to long-term use.

Description

technical field [0001] The invention relates to the technical field of gas flow detection, in particular to a gas weighing device. Background technique [0002] The mass-time method gas flow standard device is a standard device for measuring gas mass flow. In application, gas is filled into the gas weighing tank within a preset time, and the gas mass flow rate during the measurement process is calculated by measuring the filling time and the mass change of the gas weighing tank before and after filling with a balance. Wherein, the gas weighing tank is a single-layer tank body. Since the gas weighing tank is inflated before and after being inflated, the pressure and temperature changes of the gas in the tank will cause the volume of the gas weighing tank to change, so that the air buoyancy of the gas weighing tank will change, and the weighing of the gas quality will be affected. Quantitative results are affected. In addition, the balance includes: a support body and a bea...

AI Technical Summary

Problems solved by technology

After the balance is used for a long time, the V-shaped groove of the support body will be worn, and the beam is prone to deflection. It cannot be guaranteed that the pressure direction of the beam on the support body is consistent with the direction of the center of gravity of the hooks at both ends of the beam. Quantitative results affect

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