METHOD AND SYSTEM OF UNIVERSAL PROTECTION OF OPEN APERTURES OF DOUBLE-TRACK TUNNELS OF SUBWAY Russian patent published in 2014 - IPC E21F1/14 F24F9/00 

FIELD: construction.

SUBSTANCE: complex protection of an open double-track aperture is created by creation of two curtains of gate type (1 - cold and 2 - warm degrees of protection) and a single curtain that forms a spreading jet of warm air (3 degree of protection), and also heating of a part of penetrated cold air by mixing with warm air due to overflow of air via holes in a wall that separates the double-track tunnel into "warm tunnel" and "cold tunnel". The system is designed to implement the method, represents slot elements of channels-air ducts for formation of flat air jets. A radial fan in the body, built into a curtain structure and collecting air for formation of the forced jet of the first degree of protection directly in front of it from the tunnel. A ventilation chamber and a prechamber placed above the tunnel, connected along separate channels-air ducts with slot elements of the second and third degrees of protection. Ventilation channels for formation of forced flows of warm air, special through holes in a partition between the "warm" and "cold" tunnels.

EFFECT: joint operation of all degrees of protection provides for protection against longitudinal, transverse and cyclone unauthorised penetration of external cold air into a tunnel, including protection against freezing of structures.

4 cl, 4 dwg