JPS6469931A - Leakage checking apparatus of pipe - Google Patents

Abstract

PURPOSE:To omit sealing of both end parts of a pipe and to automate a series of workings required for leakage check, by providing a coupler, which is linked to the other end of the pipe to be checked, whose one end is sealed, in a airtight mode. CONSTITUTION:For example, a coupler 4 is linked to the other end part of a pipe, whose one end part is sealed. Under this state, the pipe is inserted into a container to be checked 2. The open end part of a vacuum part is closed by the cooperation of the coupler 4 and a sealing member 3 in an airtight mode. Under this state, the inside of the pipe 1 is evacuated with a first evacuating device 10 so as to provide a vacuum state. Then checking gas is supplied into the pipe from a gas feeding device 11. Thereafter, the inside of the container to be checked 2 is evacuated with a second evacuating device 17 so as to provide a vacuum state. Thus leakage is checked. In this way, a series of steps required for the leakage check can be automated. Since the other end part of the pipe 1 is linked to the coupler 4 during the execution of a series of steps required for the leakage check, it is not necessary to seal the other end part of the pipe 1.