LOWER PART OF UNDERGROUND FIRE HYDRANT Russian patent published in 2012 - IPC E03B9/08 

FIELD: construction.

SUBSTANCE: device comprises a vertical section of a body, a horizontal section of a body with an elbow, a drain valve with a discharge opening, a tap, a reservoir. The vertical section of the body is placed onto a fire support. The horizontal section of the body with the elbow transits into the vertical section of the body. The drain valve with the discharge hole is installed as capable of closing and opening of the discharge hole. The tap is installed in the area of horizontal body section connection to a water line. The tap is installed as capable of closing water supply into the cavity of the lower part of the fire hydrant. The reservoir is installed under the drain valve. Between the tap and the elbow on the horizontal section of the body there is an ejection device. The ejection device has lower parts of a confusor and a diffuser sloped towards the centre of a working chamber. The drain valve with the discharge hole is arranged in the specified centre of the working chamber. The reservoir is made as insulated for draining water from a riser and the horizontal section of the pipeline after closing the tap and is located in the area of soil freezing. The drain valve is installed in the specified reservoir.

EFFECT: structure will prevent freezing of remaining or soil water in the riser and horizontal parts of the device, will increase reliability of water flow start-up and shutdown processes and eliminate participation of the service personnel to remove water from the inner cavity of the fire-prevention water-discharge device of underground type and during its putting into operation.

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