초록 ▼

A lid mounting structure for a pressure vessel for preventing a lid member 2 crimped to a curled portion 6 of an opening 5 of a vessel body 1 from being blown away by an abnormal rise of the internal pressure. A cut-away portion 8 or a through hole is formed in an outside wall of the curled portion

A lid mounting structure for a pressure vessel for preventing a lid member 2 crimped to a curled portion 6 of an opening 5 of a vessel body 1 from being blown away by an abnormal rise of the internal pressure. A cut-away portion 8 or a through hole is formed in an outside wall of the curled portion 6, thereby locally reducing the elastic deformation resisting strength of the curled portion 6 with respect to expansion of the inside diameter of the opening to a level lower than that of the elastic deformation resisting strength of the lid member 2 in the inward radial direction.

대표청구항 ▼

[ We claim:] [1.] A lid mounting structure for a pressure vessel, the structure comprising:a body provided with a curled portion curling outward at periphery of an opening;a lid member fixed on the opening of the body;said lid member being provided with a ring-like capping portion having an inverse-

[ We claim:] [1.] A lid mounting structure for a pressure vessel, the structure comprising:a body provided with a curled portion curling outward at periphery of an opening;a lid member fixed on the opening of the body;said lid member being provided with a ring-like capping portion having an inverse-U shape in cross section so as to be capped around the curled portion, a side wall extending downward from an inner and lower end of the capping portion so as to be received with an inner circumferential face of the curled portion, and a bottom extending inwardly from a lower end of the side wall;said lid member being fixed to the opening of the body by projecting lower portions of the side wall outward in radial directions to be crimped with under face of the curled portion; anda ring-like gasket interposed between the curled portion and the capping portions,wherein a seal structure constructed with the curled portion, the gasket and the capping portion, is not uniform with respect to circumferential direction such that at least one of the curled portion, the gasket or the capping portion is elastically deformed to cause local leak before the lid member is plastically deformed to be blown away.