Sealing performance is a major performance parameter for many fixed end connectors. To avoid equipment damage caused by connector leakage, the accuracy of sealing performance testing for fixed end connectors is particularly important. Of course, these airtightness tests are based on sealing and sealing the tested object first. The commonly used sealing detection methods are as follows:
1. Helium mass spectrometer leak detector detectionHelium mass spectrometer leak detector is a common airtightness detection device that uses air from one end of the product to reach a negative pressure state and then sprays helium gas from the other end of the product to determine whether there is a leak by detecting the concentration of helium gas at the negative pressure end. The disadvantage of this detection method is that the vacuum pumping process of the equipment is slower and the higher the product efficiency, the limited negative pressure provided by the machine cannot provide detection under high pressure conditions
Secondly, box pressure testingThis testing method is mainly used by the connector user before product installation.
. Using a simulated cabinet and box structure, install the fixed end connector onto the box, increase the air pressure inside the box, and then inject water to the upward end of the connector to observe if there are bubbles emerging to identify whether the product is leaking. This method is only applicable to situations where there are few specifications and models, and for situations where there are many models and different specifications, a large number of simulated boxes need to be manufactured and occupy a huge amount of space
3. Deep water detection.The method of deep water detection is to connect one end of the product with a sealed fixture or product to form a closed cavity. A water absorption test paper is placed in the closed cavity in advance, and then the product is placed in the required pressure of deep water for a period of time before taking out and observing whether there is water absorption on the test paper.
. This method requires a very inconvenient deep water environment and a long immersion time, which is not suitable for batch Baijian. It can only be used for periodic or simulated experiments
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