| 摘要 |
<p>The device for stopping the flow in a pipe comprises: a body (12) with an internal cavity (20); a shutoff member (41) which is movable along a direction of displacement in said internal cavity (20); and at least two fluid passage ports (16) opened in walls (18) of said cavity that are inclined to the direction of displacement of the shutoff member; and in which said shutoff member comprises sealing means (52) for the closure of said ports, with sealing surfaces inclined to the direction of displacement, characterized in that said shutoff member comprises a first inner part to whhich said sealing means (52) are fitted in such a way as to be able to slide relative to the inner part, said inner part and said sealing means being in mutual contact on sliding surfaces (44) inclined to said direction of displacement, so that during the closure of the stop device the shutoff member (41) drives the sealing means (52) until they engage with means of arrest (22) and, as the closure movement of the shutoff member continues, the inner part slides relative to the sealing means, causing compression of said sealing means against said ports (16).</p> |
