| 摘要 |
The invention relates to an improved anti-fraud blocking system for valves for supplying liquids and gases, said system comprising a cover in the form of a cap (8) that screws onto the seat (7) of the valve-actuating shaft (6), which shaft causes the valve plug to rotate, replacing the actuating wrench with said cap (8) once the valve is closed. The valve body is provided with projecting stops in the neck (2) region covered by the cap (8) where an internal projection (16) is accommodated, preventing same from rotating. The safety nut (17), which secures the cap (8) to the shaft (6) of the valve, adopts the form of a particular profile that can only be manipulated by a pipe wrench which has said profile, and which is only available to the authorised administrator, holder or owner. In addition, the end of the cap (8) is provided with a transverse drill hole (15) for accommodating a padlock. |
