CUT-OFF VALVE Russian patent published in 2018 - IPC F16K17/40 

FIELD: motors and pumps.

SUBSTANCE: invention relates to the field of the solid fuel rocket engine thrust cut-off. Cut-off valve comprises body rigidly connected to the combined plug, containing spherical and cylindrical parts, nozzle, covering the plug cylindrical part annular detonating charge, electric detonator installed opposite the annular detonating charge, made with the directed towards the plug cylindrical part annular cumulative groove. Body inner part and the combined plug are protected by the heat insulator. Annular detonating charge is clamped by the erosion press material bushing, body and bushing are made at the point of contact with the detonating charge in the form of annular groove, which radius is equal to the detonating charge cross section radius. Distance between the closest to the plug cylindrical part body and bushing end surfaces is equal to the detonating charge cumulative groove width, in the body a retainer is located, made in the form of pin with head in the form of pointed plate, on which the detonating charge ends are press fitted.

EFFECT: increase in the cut-off valve operation reliability.

5 cl, 5 dwg