Apparatus for and method of testing leakage of hollow member
AssigneeDaiwa Can Company
InventorsShigeya Kawai, Tsuyoshi Yoshioka
Life of this patent
Estimating the term…
Abstract
A leakage testing apparatus for testing whether or not a hollow member of a hollow shape has a leakage, comprising: a hold mechanism for holding the hollow member such that the inside and the outside are isolated gas-tight from each other; an injection mechanism for injecting a testing gas into the hollow member held by the hold mechanism; and a leakage detector for sucking the gas around the hollow member held by the hold mechanism, to detect the leakage on the basis of the concentration of the testing gas in the sucked gas.
Claims13
A leakage testing apparatus for testing whether or not a hollow member of a hollow shape has a leakage, comprising:
- a hold mechanism for holding said hollow member is configured such that an inside volume and an outside of said hollow member are isolated gas-tight from each other and so that the outside of said hollow member is exposed at all times, to an atmosphere external to the testing apparatus which includes an atmospheric gas;
- an injection mechanism for injecting a testing gas into the inside volume of said hollow member held by said hold mechanism;
- and
- a leakage detector configured to suck the atmospheric gas at all times and any of the testing gas, with the atmospheric gas, leaked from the inside volume of the hollow member from around the outside of said hollow member, to detect the leakage on the basis of the concentration of the testing gas in the sucked gas.
A method of detecting whether or not a hollow member to be tested has a gas leakage, comprising:
- setting the measured value of the concentration of a testing gas, as contained in an ambient gas around an outside of said hollow member, as a reference value;
- injecting the testing gas into the inside of said hollow member after the step of setting the measured value;
- sucking and collecting the ambient gas around said hollow member;
- measuring the concentration of the testing gas in the sucked and collected ambient gas;
- and
- comparing the measured value and said reference value to decide whether or not there is leakage from said hollow member.
Dependencies are inferred from the claim text.