Gas cylinder test device by using external measuring method of variable-volume burette

Abstract

The invention relates to a gas cylinder test device by using an external measuring method of a variable-volume burette, belonging to the technical field of gas cylinder quality detection. The gas cylinder test device by using the external measuring method of the variable-volume burette is formed by connecting and assembling a water jacket part, a liquid level detection part, a piston measuring burette part, a pressure detection part, an electrical control part, a microcomputer tracking part and technically characterized in that liquid level change generated due to the deformation of a gas cylinder can be detected in a liquid level pipe while the position of a piston is controlled by digital-control driving so that the absolute position of the liquid level in the liquid level pipe, i.e. the change including the full deformation and the residual deformation in a piston measuring burette, is surely kept unchanged, and the residual deformation rate is calculated. The invention overcomes the defect that other external measuring methods are apt to be influenced by external conditions, aims to break through the influence and the restriction of a traditional measuring method and a relative gas cylinder water pressure test device thereof on the development of the gas cylinder industry to a certain extent. The test accuracy is improved, and the test has convenient operation and intuitive results so that the gas cylinder test device by using the external measuring method of the variable-volume burette is ideal equipment for water pressure tests with gas cylinders.

Description

technical field [0001] Gas cylinders are mobile pressure vessels used internationally. They are used in a wide range and range, and can be filled repeatedly. There are tens of millions of steel seamless gas cylinders in service in my country. With the implementation of the environmental protection vehicle project and the popularization and application of natural gas vehicles in China, the use of gas cylinders is also increasing day by day. The medium stored in the gas cylinder includes oxygen, nitrogen, hydrogen, oil and natural gas and other high-pressure gases. In order to reduce the possibility of property loss and personal casualties caused by gas cylinder leakage or explosion, it is necessary to conduct regular hydrostatic tests on the gas cylinders before they leave the factory and the gas cylinders in service to determine the elastic and plastic deformation of the gas cylinders. The hydrostatic test of the gas cylinder can accurately obtain the total deformation of th...

AI Technical Summary

Problems solved by technology

[0010] The results obtained through repeated experiments and theoretical calculations show that many external measurement methods are easily disturbed by external conditions, and there are many unavoidable factors that cause errors, such as negative pressure caused by the rise of the liquid level in the weighing container.

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