| 摘要 |
<p>1. Valve for polluting or dangerous fluid, remotely controllable and dismountable from outside a biological protection enclosure (12), characterized in that it comprises : - a valve body (1) with pipes, one (or more) of which issuing towards the middle of the body, the other issuing into the bottom of said body, said body presenting a truncated cone-shaped inner surface ; - a rotary plug (4) adaptable to the inside of said body and having at least a laterial surface in plastic material ; - an external sleeve (9) integral with the valve body (1) constituted by a shaft of which the upper part is fitted in and/or fastened on the biological protection enclosure (12) and - a plug extracting and sealing member, placed inside the sleeve and comprising : . a central cross-piece (6) surrounding a rod (10) integral with the upper face of the plug (4) and exerting, under the effect of an elastic member (11), a pressure on the upper face of said plug (4) ; . a peripheral cross-piece (7) surrounding the central cross-piece (6) and resting on the upper face of the valve body (1), the upper part of said peripheral cross-piece (7) receiving a screwed part (15) serving as a support for said elastic member (11) ; . a metallic membrane (2) and a membrane in plastic material (3) inserted between the lower part of said cross-pieces and the valve body and/or the plug ; . and at least a dismountable device (13, 14) permitting to lock the said cross-pieces (6, 7) with the said sleeve (9) whilst exerting a pressure on the upper part of the peripheral cross-piece (7).</p> |
