| 摘要 |
<p>Disclosed is a quick-coupling fitting for pipes, comprising a female element and a male element that can be coupled together, which elements are formed by fixed parts and axially sliding parts that when at rest are urged in closed positions in which the axially sliding parts close passage ports for a fluid in the female and male elements and when the two elements are coupled together the axially sliding parts are displaced by engagement with corresponding parts of the other element in open positions in which they cause the passage ports to open and communicate with each other the axially sliding parts of the female element comprising a bush that is axially sliding and elastically urged toward the closed position, the fixed parts of the male elements comprising a fixed internal casing provided with a seal that can be covered by the bush of the female elements on the occasion of the coupling action, wherein the male element comprises valve means arranged in a supply conduit for the passage port of the male element to close the supply conduit in initial stages of the coupling actions and to open the supply conduit in final stages of the coupling action, and wherein the seal is housed in a seat located in the proximity of one end of the internal casing facing the bush, whereby the seal is covered by thebush in the initial stages of the coupling action and before the valve means opens the supply conduit.</p> |
