HEAT GATE VALVE Russian patent published in 2009 - IPC F16K17/40 

FIELD: instrument engineering.

SUBSTANCE: invention refers to armature engineering and aims at automatic shutdown of pipeline flow area, including particularly gas pipelines in emergencies, e.g. in fire. A heat gate valve comprises a direct-flow body with inlet and outlet, in-built spring-loaded gate and transverse sprocket. The external sprocket rim is fixed in the body and pinned to a hub that is provided with a gate rod guide. One of the pins has a through gallery that comprises a thrust screw and a travelling joint pin from the rim. The joint pin actuates a ball stopper that is provided in the rod groove and fixes open. Between the thrust screw and the travelling joint pin, there is a fuse strip. The body contains an internal cylindrical boring interfaced with inlet and outlet along the tapered hole. The gate represents in cross-section a cylinder with the equal conical end faceting that makes the angle 12°-17° with conical surfaces.

EFFECT: invention allows decreasing hydraulic resistance, simplifying design and assembly, and improving durability and reliability of the device.

2 cl, 1 dwg