The leak detection device in the bellows-type expansion joints

摘要

(57) Abstract Objective In the bellows die expansion joint, the bellowsCorroding, the hole opens and/or the fluid inside starts neutron leakageWith, it informs about the neutron leakage. Constitution Bellows die expansion joint outside formation bellows 2 and insideFormation bellows 3 and to make the two-layer which consists of, the edge of outside formation bellows 2The hole 4 is bored through near the section. And, detection Bello of metal makeMaking the bottom of zu 7 with the hole 4, to provide, detection bellows 7Indicator stick 9 is installed on. Detection bellows 7 and indicatorRim of stick 9 has surrounded with cover body 11. Inner layer BelloWhen the hole opened in zu 3, the fluid inside outside formation Bellozu to enter to with 2 and inner layer bellows 3, from the hole 4 detection beInflow to inside rose 7. Detection bellows 7 expanding, the indicatorStick 9 is pushed up, the neutron leakage is shown.