| 摘要 |
The invention relates to a device for shutting off large pipes in which a two-armed first lever (14) is connected through one arm (14a) to the actuating rod (9) while its other arm (14b) acts on a spring (15), while the two-armed second lever (16) is connected by one arm (16a) to the spring (15) while its other arm (16b) forms the pivot bearing (17) for the first lever (14). This arrangement enables the space occupied by the lever arrangement to be significantly reduced and provides for a simple construction. |
