US 12,704,431 B2 · Apparatus and method for leak test

Abstract

An apparatus for leak test is provided with: a gas dissolution portion having function to degasify a unused liquid; a liquid filling and circulation portion for filling the gas dissolved liquid in the test piece; a high-pressure application portion for pressurizing the filled gas dissolved liquid; a leak test portion for detecting the gas in the liquid vapor leaking out in the vacuum container from leak hole(s) of the test piece resulting from high-pressure application; and a liquid collection portion for collecting the gas dissolved liquid as relieving high pressure. The leak test process under high pressure is conducted in the closed circulated flow path. The leak test process uses the liquid easy for gas to be dissolved and to flow through the leak hole(s). Further, the leak test process uses the gas easy to dissolve in the liquid or to be detected.

Claims13

Dependent claims

A method for leak testing using, as a trace fluid, a gas dissolved liquid to conduct a leak testing of a test piece,

wherein the test piece is placed in a middle of a closed circulated flow path which goes out from a dissolution tank where the gas is dissolved at a given constant concentration, to return back to the dissolution tank through a collection tank which stores the trace fluid flown out of the test piece;
and the trace fluid is processed by a degasification process of removing other gases except said gas from the gas dissolved liquid;
and
wherein the trace fluid is processed by a filling process to flow from the dissolution tank through an interior of the test piece along the closed circulated flow path to be filled in the test piece after the degasification process.

1 more element

Dependencies are inferred from the claim text.

Apparatus and method for leak test

Life of this patent

Apparatus and method for leak test

Life of this patent

Abstract

Claims13