Low-temperature test system for gas cylinder

Abstract

The invention belongs to a pressure test technology, and particularly discloses a low-temperature test system for a gas cylinder. The system comprises a test gas cylinder and an energy accumulator, which are positioned in a Dewar, wherein the lower end of the test gas cylinder and the bottom of the Dewar are connected with a liquid nitrogen filling pipeline respectively, and the liquid nitrogen filling pipeline is connected to a liquid nitrogen storage tank; a pipeline at the upper end of the test gas cylinder is communicated with a pipeline at the liquid nitrogen cylinder end of the energy accumulator, and extends upwards after being communicated, and a pipeline plug is arranged at an outlet of the pipeline. The pipeline at the upper end of the test gas cylinder extends upwards by a certain distance after being communicated with the pipeline at the liquid nitrogen cylinder end of the energy accumulator, and the pipeline plug is designed at the outlet of the pipeline, so that exhausting during liquid nitrogen filling of the test gas cylinder and the energy accumulator is ensured, and the test gas cylinder and the energy accumulator can be ensured to stay at a full liquid nitrogen filled state. The pipeline is sealed with the pipeline plug after the test gas cylinder and the energy accumulator are fully filled with liquid nitrogen.

Description

technical field [0001] The invention belongs to pressure test technology, in particular to a pressure test system in a liquid nitrogen temperature zone of a gas cylinder. Background technique [0002] In order to verify the strength and safety of high-pressure gas cylinders, pressure tests are generally required before they are officially put into use, and high-pressure gas cylinders used in low-temperature environments require pressure tests in low-temperature environments. Due to the compressibility of gas, for safety reasons and to improve test efficiency, liquids are generally used as pressurized media for pressure tests, and the same is true for pressure tests in low temperature environments. [0003] The pressure test is carried out in a low temperature environment, and the performance requirements for the sealing of the pipeline interface and various valves are greatly increased, and the system cost is greatly increased. In addition, during the test, it is necessary ...

AI Technical Summary

Problems solved by technology

[0003] The pressure test is carried out in a low temperature environment, and the performance requirements for the sealing of the pipeline interface and various valves are greatly improved, and the system cost is greatly increased.

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