| 摘要 |
<p>A coupling for connecting liquid conduits, said coupling comprising an insert nipple (1) and a receiving nipple (15), said nipples being axially movable in relation to each other for connection and disconnection. The insert nipple (1) comprises a stationary sleeve (2) with a sealing valve body (3) spring-biased and inwardly axially movable therein. The receiving nipple (15) has an outer sleeve (16), an inner spring-biased and inwardly axially movable sealing sleeve (17) and a stationary valve central stay (28) which in disconnected condition sealingly cooperates with the sealing sleeve (17). According to the invention the sealing sleeve (17) is provided at its outer end portion with an inner wedge seal (21) arranged to sealingly cooperate with a wedge-forming conical outer surface (4) on the front end portion of the outer sleeve (2) and comprising a conical support ring (21b). Further, an inner seal (26) is arranged in a groove (26a) in the outer sleeve (16) for radial sealing cooperation with the sealing sleeve (17), and the distance between circumferentially located locking balls (19) in the outer sleeve (16) and said inner seal (26) is greater than the distance within which the sealing sleeve (17) is axially movable inside the outer sleeve (16). The sealing sleeve (17) is provided on its inner side with a seal (22) which in disconnected condition is arranged to seal against a cylindrical sealing surface (28a) of a sealing valve body (28c) of the valve central stay (28) and which comprises a sealing ring (22a) and a seal holder (23) The sealing sleeve (17) and outer sleeve (16) are provided with cooperating support means (17a, 16a; 33, 33a, 16a) permitting the sealing sleeve (17) to take up liquid pressure in disconnected condition in order to relieve the valve central stay (28).</p> |
