| 摘要 |
a) A device for locking a valve for closing off gas between an inlet and an outlet pipeline, and the method for barring (obstructing) such a pipeline. b) It includes a self-locking shutter consisting of a rod (24) the head (240) of which bears on the seat of a valve (14) on the outlet side, and the second end of which bears on an elastic means (27), the said bearing rod (24) and the spring (27) being located in the housing of a hollow rod (20), the outer rims (22) of which, located close to one end, bear via a seal (26) on a shoulder (16) of the valve on the inlet side (15). c) Pipework fittings. <IMAGE>
|
