Method for testing high-pressure gas purity

Abstract

The invention discloses a method for testing high-pressure gas purity, and relates to the technical field of gas detection. The method comprises the following steps of: step of lining sealing, whereina lining is tightly arranged between an upper sealing cover and a lower sealing cover; step of gas feeding, wherein a pressure control valve is opened, the gas in a high-pressure container enters thesealed space formed by the lining, the upper sealing cover and the lower sealing cover through a gas inlet pipe; step of testing gas purity, wherein the gas in the sealed space is measured by the gaspurity detector on the lower sealing cover, and the measurement result is sent to a controller; step of lining multi-station testing, the output shaft of the motor is controlled by the controller todrive the lower sealing cover and the lining to synchronously rotate so as to realize multi-station detection of the lining. The testing method solves the problem that an existing gas purity testing method cannot simultaneously detect the gas purity and the gas tightness of the high-pressure container, and is mainly used for testing the high-purity gas in the high-pressure container.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a method for testing the purity of high-pressure gas. Background technique [0002] With the continuous development of modern industrial technology, high-tech fields such as microelectronics, aerospace, bioengineering, new materials, precision metallurgy, and environmental science require high-purity gases such as electronic-grade gases, special gases, and standard gases (purity above 99.99%) ) The demand is constantly increasing, and the requirements are also constantly increasing; at this stage, high-pressure containers are often used for filling, storing and transporting domestic storage of high-purity gases. This type of high-pressure vessel generally includes a metal shell and a liner. The liner is generally a metal thin-walled cylindrical shape of 2 to 3 mm. The liner is set in the metal shell and has an interference fit with the metal shell. The metal shell can ensur...

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Problems solved by technology

[0003] However, in the process of storing gas in a high-pressure container, it is inevitable that some impurities will be mixed into the gas, causing pollution to the gas. The pollution in the high-pressure container includes penetration, adsorption and chemical action, etc., as well as the cleanliness and dryness of the interior of the high-pressure container. The degree will also have a direct impact on the quality and purity of the gas. After the gas is polluted, the purity of the gas will decrease, making its quality lower than the index requirements; So as to take timely measures to prevent the gas from being polluted again

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