FIRE-PREVENTION WATER DISCHARGE DEVICE OF UNDERGROUND TYPE Russian patent published in 2012 - IPC E03B9/08 A62C35/20 

FIELD: fire safety.

SUBSTANCE: fire-prevention water discharge device of underground type comprises a vertical vessel in the form of a riser, which is fixed on a fire stand, a drain valve with a discharge hole, a tap and an elbow for connection to a water supply line, which are arranged in the lower part of the riser, a reservoir arranged under the drain valve. In the lower part of the riser between the tap and the elbow there is an ejection device, in its lower middle part there is a place for water self-flowing, in which there is a drain hole and a drain valve is installed. The reservoir is made as isolated for drainage of water from the riser and the horizontal section of the pipeline after the tap closure and is located in the area of soil freezing. The drainage valve is located in the specified reservoir.

EFFECT: using this invention makes it possible to prevent freezing of residual or ground water in the riser and horizontal parts of the device, to increase reliability of water flow start and stop processes.

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