METHOD OF METRO STATIONS VENTILATION AND SMOKE REMOVAL AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC E21F1/08 

FIELD: ventilation.

SUBSTANCE: invention relates to the ventilation of metro stations providing specified microclimate parameters at a station, as well as limiting the spread of combustion products along the evacuation routes. Method includes feeding a piston flow from the tunnels to the station, dispersed removal of waste air via under platform space by station ventilation shaft and inclined passages. In the regular mode, the circulating air coming from the distillation tunnel, is removed simultaneously from the upper and lower zones of the platform through the evenly distributed along the length of the platform openings made in the upper and lower ventilation ducts, with the lower vent valve open. Then, the air coming from the upper and lower ventilation ducts is removed by means of a tunnel ventilation fan to the surface through the ventilation shaft. In the smoke removal mode, the lower ventilation duct is automatically closed by an electric motorized ventilation valve, and the removal of combustion products is carried out only through the upper ventilation duct, limiting the spread of combustion products along the evacuation routes. Ventilation and smoke removal device at the stations includes inlet and exhaust openings – tunnels, stationary exhaust ventilation shaft with subplane duct. Device includes ventilation ducts located above and below the platform outside the dimensions of the rolling stock, with the sectional area of the ventilation duct above the platform F₁ = 14 m² and the channel area under the platform F₂ = 16 m². In the walls of ventilation ducts, evenly located ventilation holes of 4 m² in the channel above the platform, and an area of 0.5–1.0 m² in the channel under the platform, herewith ventilation duct in the lower zone is equipped with a vent valve with an electric drive.

EFFECT: maintaining normalized parameters of the microclimate at metro stations with double-track tunnels, providing the possibility of regulating air exchange in the center of the platform of the station during the movement of trains, limiting the spread of combustion products along the evacuation routes in case of smoke at the station.

2 cl, 3 dwg