| 摘要 |
A pneumatic fender and a mouth piece metal for a pneumatic fender with significantly enhanced maintainability wherein a safety valve can be attached and detached and a confirmation test of the valve opening pressure of the safety valve can be performed on the pneumatic fender while in use, and the labor and time required for these operations are greatly reduced. An open/close valve (9) is constantly biased by a resilient member (10) toward a closing direction of a through hole (7a) formed on a dividing wall (7) constituting a receiving chamber (8); a safety valve (6) is isolated from a cavity (2a) of a fender bladder (2) by a receiving chamber (8), thus allowing the safety valve (6) to be able to be detached and attached while the pneumatic fender (1) is in use. A confirmation test of a valve opening pressure of the safety valve (6) is performed by opening a receiving chamber open/close valve (12a) and raising an internal pressure of a cavity (8a) of the receiving chamber (8) to a pressure threshold (Pm) via a receiving chamber communication passage (12). Upon an internal pressure (P) of the cavity (2a) being less than the pressure threshold (Pm) and greater than a standard pressure (Pc), which is a sum of an initial internal pressure (Pi) and an allowable pressure (Pt), the open/close valve (9) opens the through hole (7a), thus allowing the safety valve (6) to function. |
