| 摘要 |
<p>PURPOSE:To efficiently prevent an injection liquid due to boiling liquid and pressure rise by providing an inward flange, a cover integrally having a cylinder and a blind plate and formed with an escape gap along the periphery on the upper surface side of the flange, and an outer cylinder formed with an escape space to the outer surface of the cover. CONSTITUTION:Injection liquid and the like in a vessel body 1 is almost guided into a cylinder 3a of a cover 3, disturbed to be risen by a blind plate 3b of the upper part of the cylinder 3a, inverted, guided to the cylinder 3a, dropped to be returned into the body 1 by its own weight. A momentary pressure rise is rapidly released through a gas passage 8 formed of an escape gap 5 and an escape space 7. Since the gap 5 is low in height, but relatively long and wide in area over the entire periphery in the case of pressure releasing, it is effective to release the pressure without discharging the liquid out by decelerating its flowing speed. The discharge liquid or the like tending to be discharged from the gap 5 is disturbed to be advanced by an outer cylinder 4, inverted, and returned into the body 1 through the gap 5.</p> |
