Sealing performance detection method by using vacuum balancing method
A detection method and technology of sealing performance, which can be used in liquid/vacuum measurement for liquid tightness, and by measuring the acceleration and deceleration rate of fluid, etc., which can solve problems such as inability to detect large leak holes and inability to observe pressure changes. To achieve the effect of quick detection of numerical accuracy and easy operation
Inactive Publication Date: 2010-08-11
河北第二机械工业有限公司
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Problems solved by technology
Its disadvantage is that it cannot detect large leakage holes, because the leakage of large leakage holes is completed at the moment of vacuuming, and no pressure change can be observed according to the above method.
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[0029] Embodiment: TNT packaging test (balance cylinder volume: 530347mm3)
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The invention relates to a negative pressure stabilizing sealing capability inspection equipment and method for product package, with the device made of the stabilizer barrel and inspection barrel connected with the vacuum pipe, which has stabilizer valve and pressure sensor, the stabilizer barrel connected with the vacuum pump through the throttle valve, the inspection barrel connected with charge valve through the channel, the connection channel of the pressure sensor and the vacuum channel connected with the data settlement unit through signal lines. In this way, it can improves the sealing capability, with higher inspection speed and accuracy.
Description
technical field [0001] The invention relates to a method for detecting sealing performance by a negative pressure balance method. technical background [0002] At present, there are water immersion method and traditional negative pressure method for testing the sealing performance of packaged products. The water immersion method is to put the product under test into the water and observe whether there are bubbles escaping. This method is more effective for larger leakage holes, but for smaller leakage holes, the test time is longer, and it is not suitable for some products that fail when immersed in water. The traditional negative pressure method is to put the packaged product under test into a sealed container, vacuumize the sealed container, and observe the pressure change in the sealed container after turning off the vacuum pump. If the pressure change does not exceed a certain range within a certain period of time, it is regarded as qualified. Its disadvantage is that...
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IPC IPC(8): G01M3/26
Inventor 徐辉徐荣芬张上慧高欣宝邱国平
Owner 河北第二机械工业有限公司