| 摘要 |
A multiply secured coupling device for oxygen lances (1) is achieved in that both the plug-in part (8) of the safety pipe (3) and the connection part (18) of the lance holder (2) and also the union nut (9) have an extending safety piece (10, 11). As a result, the plug-in part (8) can be pushed a considerable distance into the nut part (19) or into the connection part (18) and then be fixed via the union nut (9). A total of five sealing zones, which in particular together effectively prevent the escape of highly flammable gases, in particular oxygen, are produced. |
