| 摘要 |
<p>A safety valve (1), comprising a body (2), a fixed body (3), a soluble body (7), a movable body (8), an energizing member (9), a movable plug body (10), and a movable plug body holding means (11), the fixed body (2) further comprising a small diameter axial passage (14) led into a container (T) and a large diameter axial passage (15) opened to the upper end of the fixed body, the movable plug body (10) further comprising a small diameter shaft part (1 8) fitted to the upper end part of the small diameter axial passage (14) of the fixed body (2), an intermediate shaft part (19) having the clearance thereof from the lower end part of the large diameter axial passage (15) of the fixe d body (2), and a large diameter shaft part (20) slidably fitted to the intermediate portion of the large diameter axial passage (15) of the fixed body (2). An axial passage (21) extending from the upper end to the lower en d of the large diameter shaft part (20) of the movable plug body (10) is provided in the large diameter shaft part (20) of the movable plug body (10) and a communication passage (22) opening to the peripheral surface of the intermediate shaft part (19) of the movable plug body (10) and allowed to communicate with the lower end of the axial passage (21) of the large diamet er shaft part (20) is provided in the intermediate shaft part (19) of the movab le plug body (10).</p> |
