| 摘要 |
<p>Disclosed is a gas permeability testing apparatus. The apparatus comprises: a vacuum pump (8), and an infiltration pond, the infiltration pond being divided by a sample (10) into a testing chamber (11) and a test gas chamber (9). The vacuum pump (8) is respectively connected to the testing chamber (11) and the test gas chamber (9) via a pipeline. A first valve (15) and a second valve (7) are provided on the pipelines connecting the vacuum pump (8) with the testing chamber (11) and the test gas chamber (9) respectively. The testing chamber (11) is connected to a first pressure sensor (12) and the test gas chamber (9) is connected to a second pressure sensor (5). The test gas chamber (9) is connected with a test gas source (1) via a third pipeline (3). A third valve (2) is provided on the third pipeline (3). The advantages are a simple structure, reliability of use, convenience of use, independent vacuum-pumping of the testing chamber (11), effective sealing between a test sample (10) and the testing chamber (11) created by means of a pressure difference between the test gas chamber (9) and the testing chamber (11), thorough vacuum-pumping achieved in the testing chamber (11), and overall control of the testing procedure with independent control of tests in a plurality of chambers.</p> |
