Deicing system for a butterfly valve

摘要

Auto-deicing system with a valve having a butterfly plate (5). The spindle (8) of the valve (4) is controlled by a system terminated by a pin (11) coaxial to the spindle (8) and which, like the latter, has slots (13). When the pin (8) is iced up, the control system initiates a movement of the pin (11) so that the slots (12, 13) come into extension with one another, which allows a circulation of the hot gas on one side of the butterfly plate (5) through the spindle (8), which is thus reheated. The opening movement resumes when the ice has melted. The invention is applicable to cold starting systems on aircraft engines. (FIG. 3 )