Sealed leak detection device and leak detection method for tantalum insulators

Abstract

The invention discloses a sealed leak detection device and a leak detection method for a tantalum insulator, which comprises a helium mass spectrometer leak detector, a leak detection port is arranged on the top of the helium mass spectrometer leak detector, a connecting piece is arranged above the leak detection port, and the connecting piece is connected to the leak detection device. A fluorine rubber sealing ring is set between the leaks, a through hole is set in the middle of the connecting piece, an air chamber is arranged above the connecting piece, and a tantalum insulator is arranged between the air chamber and the connecting piece, and a blind hole is arranged inside the air chamber , the blind hole communicates with the through hole in the middle of the connector, and the diameter is larger than the diameter of the glass sealing area of ​​the tantalum insulator. A gland is arranged above the gas chamber, and the inner wall of the lower end of the gland is threadedly connected with the outer wall of the upper end of the connector; the air chamber The middle part of the top of the piece is provided with a first air outlet pipe and a trachea, and the other end of the trachea is connected with an air pressure tank. The invention can simulate the internal pressure of the capacitor after working, and use the sealed leak detection device to detect the gas leakage of the tantalum insulator, with high sensitivity, fast detection speed and true and reliable detection effect.

Description

technical field [0001] The invention relates to the technical field of a sealed leak detection device for tantalum insulators, in particular to a sealed leak detection device and a leak detection method for tantalum insulators. Background technique [0002] Tantalum electrolytic capacitors have high stability, high reliability, rectification effect and self-healing function, can work normally under the condition of severe temperature changes, have large volume specific capacitance, small leakage current, small size, high reliability and stable performance It is one of the important components of communication, medical, transportation, aerospace and other equipment. Therefore, the sealing performance and reliability of the insulator are the basis and premise to ensure the reliability of the capacitor, and are the key components for whether the capacitor leaks acid. For a long time, the test method for tantalum insulators has been the test method in GJB360 "Test Methods for E...

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Problems solved by technology

[0003] Our company applied for the square high-energy tantalum hybrid capacitor and its manufacturing process on July 17, 2013. The application number is CN201310298950.2, and the authorized announcement number is CN103366968B. We found the following problems with conventional leak detection devices and methods: 1. Tantalum capacitors work under high pressure for a long time. During the working process of the capacitor, a certain amount of hydrogen gas will be generated inside the tantalum capacitor, resulting in a large internal pressure. Therefore, the conventional leak detection device and method do not really reflect the tantalum capacitor. The internal pressure of the capacitor increases after operation, so the test results cannot truly reflect the sealing effect of the tantalum insulator in the tantalum capacitor

2. For the sealing leak detection of tantalum insulators, the existing practice is to make a capacitor and then conduct leak detection. Once a substandard product appears, the entire tantalum capacitor will be scrapped, causing great losses to the capacitor manufacturer (the value of the tantalum capacitor is 50 times the value of the insulator), resulting in high product rejection rate and high production cost, which brings great economic pressure and burden to the enterprise. This has become one of the problems that many tantalum capacitor manufacturers need to solve urgently

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