| 摘要 |
<p>The invention relates to a safety valve consisting of a body into which there open out two ducts and a sleeve housing a spring (7) urging a flap (8) towards a seat (9). The flap (8) has two opposite faces, one so-called end face which is the stopping face and the other so-called rear face which receives the thrust of the spring bearing on a stop (12) associated with the sleeve, this flap being connected, by means of a manoeuvring rod passing through the stop (12) to a manoeuvring member (17) having means interacting with complementary means associated with the body of the valve, such as two antagonistic surfaces which, by the displacement of one on the other, give rise to the manoeuvring of the flap. It is characterised in that on the one hand the internal wall (27) of the stop (12) interacts locally in the guidance and translation of the flap (8) which for this purpose has an external face (28) whose cross-section is complementary to that of the internal wall (27) of the stop and, on the other hand, the face (29) of the bottom of the dished part opposite the one (30) constituting the support for the spring (7) directly carries the means (19) interacting with the complementary manoeuvre-control means carried by the manoeuvring member. <IMAGE></p> |
