Device for testing high-pressure gas permeability of sealing material in tensile state and application

Abstract

The invention relates to a device for testing the high-pressure gas permeability of a sealing material in a tensile state and application, and the device comprises a sealing box used for placing a sealing material sample (8); a stretching mechanism used for stretching the sealing material sample (8); a permeable gas measuring mechanism used for testing the gas permeability coefficient of the sealing material sample (8), wherein the stretching mechanism is clamped at two ends of the sealing material sample (8), the permeable gas measuring mechanism comprises a gas inlet unit and a gas receiving unit which are respectively positioned on two sides of the sealing material sample (8), and the gas receiving unit is provided with a signal component for monitoring gas. The device can be used for testing the high-pressure gas permeability of the sealing material in a tensile state. Compared with the prior art, the device has the advantages of safety, high efficiency, capability of obtaining the high-pressure gas permeability coefficient of the sealing material in different stretching states and the like.

Description

technical field [0001] The invention relates to the field of pressure vessel testing, in particular to a device for testing the high-pressure gas permeability of a sealing material in a stretched state and an application thereof. Background technique [0002] A layer of sealing material is usually laid in the existing gas storage container to prevent the stored high-pressure air from leaking. However, under the action of high-pressure air, the sealing material may still be breathable and cause air leakage. At the same time, the sealing material will also be stretched and deformed along the circumferential direction of the container, which may further accelerate the air leakage problem. Therefore, in order to evaluate whether the sealing material can be used in the gas storage container, it is necessary to evaluate the gas permeability of the sealing material in the gas storage container, and it is also necessary to accurately obtain the gas permeability performance data of t...

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Problems solved by technology

[0005] The design pressure of the high-pressure test is generally around 10MPa. When testing the pressure of the low-pressure chamber, if a high-pressure sensor with an upper limit of 10MPa is used, the test accuracy is 1kPa, which is far greater than the pressure change in the actual test, and the pressure value of the low-pressure chamber is likely to be long. If the time has not changed; if a pressure sensor with a small range (such as 1kPa ~ 10Pa) is used, once the sample ruptures suddenly under the action of high pressure during the test, the pressure in the low pressure chamber will increase sharply to 10MPa in the high pressure chamber. destroy the pressure sensor

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