Gas metering device

Abstract

The invention relates to a gas metering device which comprises a gas inlet, a gas outlet, a liquid outlet, a gas-liquid separator, a one-way valve, a pneumatic valve, displacement metering sensors, pistons, over-range sensors, a gas container, a safety valve, a signal processing system and a control system. The gas-liquid separator is arranged between the gas inlet and the pneumatic valve, the pneumatic valve is connected to the two ends of the gas container through pipelines, the safety valve is connected to the arc-shaped part of the bottom of the left side of the gas container through the pipeline, and the pistons, the displacement metering sensors and the over-range sensors are installed in the two sides of the gas container. The displacement metering sensors and the over-range sensors transmit received signals to a signal processing system, and a processing result is fed back to the pneumatic valve and the safety valve through a computer control system so that vertical reciprocating motion of the pistons is realized. The gas metering device is simple in structure, accurate metering of a small-flow gas can be guaranteed, a large amount of gas can be automatically metered, the result is reliable, and the safety of the whole device is guaranteed due to a built-in safety structure.

Description

technical field [0001] The invention relates to the technical field of gas metering in laboratories, in particular to a gas metering device. Background technique [0002] For the gas measurement in the laboratory, two methods are usually used: drainage method measurement and metering device measurement. The measurement of the drainage method often requires a certain amount of labor and energy of the experimenters, and there are many hidden dangers of human error. At the same time, there are corresponding requirements and restrictions on the gas to be measured. On the one hand, it is difficult for ordinary metering devices to accurately measure small-flow gases. On the other hand, it has a limited range, which makes it difficult to measure large-scale gases. It is necessary to pause the experiment and switch the process to achieve the metering of the entire process. The metering results rely on manual reading. It is easy to produce large errors. In addition, the lack of an e...

AI Technical Summary

Problems solved by technology

The measurement of the drainage method often requires a certain amount of labor and energy of the experimenters, and there are many hidden dangers of human error. At the same time, there are corresponding requirements and restrictions on the gas to be measured.

On the one hand, it is difficult for ordinary metering devices to accurately measure small-flow gases. On the other hand, it has a limited range, which makes it difficult to measure large-scale gases. It is necessary to pause the experiment and switch the process to achieve the metering of the entire process. The metering results rely on manual reading. It is easy to produce large errors. In addition, the lack of effective safety structure is also an obvious defect of this type of metering device.

Although some metering devices can achieve continuous gas metering, they require a separate exhaust operation process, which increases the complexity of the metering process

There are a variety of instruments and devices for gas measurement on the market, including high-precision, automatic, and digital measurement equipment, but most of them are expensive and not cost-effective

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