TUNNEL WITH A FIRE EXTINGUISHING SYSTEM WITH COMPRESSED AIR FOAM.

摘要

Tunnel with a fire extinguishing system with compressed air foam, in particular a road tunnel divided into several extinguishing zones with foam generators arranged outside the tunnel at least at the ends of the tunnel, which are constituted by mixers (4) fed with a mixture of water and foam former, as well as with compressed air, said mixers (4) being connected with foam ejection devices (20) through a foam extinguishing agent conductor (10) for extinguishing fire on both sides from two adjacent foam generators, characterized in that in the conduit (10) of foam extinguishing agent is arranged behind the mixer (4), a means (18, 19) for adjustable diameter reduction of the tube and the setting of a given initial pressure of the extinguishing foam and a predetermined flow pressure in the foam ejection device (20).