Helium mass spectrometry leak detection box method
There are many specific methods for helium mass spectrometry leak detection, and the applicable environment is also different. The leak detection box method is a helium mass spectrometry leak detection method which is suitable for welding seam leak detection. This time, let's take a look at the leak detection box method with the vacuum pump manufacturer.
Leak detection box method is suitable for weld leakage detection of welded parts, especially when the welding parts are not completely manufactured or formed into a whole container, it is more convenient to use leak detection box method.
As shown in the figure above, when using the leak detection box method to detect the leakage, first cover the leak detection box on the suspicious part, and use the auxiliary pump to pump air to create a vacuum environment, and make the box close to the surface of the inspected piece. Then adjust the leak detector to make it work. Then, the spray gun is used to apply helium on the back of the cover part of the leak detection box. If there is a leak, the helium will penetrate into the leak detection box and the leak detector. Thus, according to the output signal of the leak detector, the location and leakage rate of the leak can be determined.
In the leak detection box method, the leak detection box is generally a special rigid box body which can well match the surface of the inspected piece. Its shape and size should be suitable for various types of welds as far as possible. At the same time, it should be ensured that the sealing is reliable and the box is convenient. The material can be metal, hard plastic or hard rubber. In addition, in order to detect the leakage, the vacuum degree in the leak detection box can reach at least dozens of PA.