| 摘要 |
FIELD: fire-fighting, particularly fire-extinguishing devices generating gas-liquid jets and high-fog curtains for fire suppression, for instance back-pack fire-extinguishers adapted to create and control gas-and-droplet jet. ^ SUBSTANCE: fire-extinguishing device comprises at least one tank fire-extinguishing liquid storage, liquid supply system and directional gas-and-droplet jet generation means. The gas-and-droplet jet generation means includes outlet nozzle with central profiled channel and at least four peripheral profiled channels having outlet orifices of the same dimensions. Each profiled channel includes serially arranged conical section converging in flow direction, cylindrical section and conical section diverging in flow direction. Outlet orifices of peripheral channels are uniformly distributed along a circle in body end surface and are created about outlet orifice of central profiled channel. Distance t between axes of symmetry of neighboring outlet peripheral channel orifices along the circle is selected from the following condition: 1.2d0<=t<=2.5d0, where d0 are diameters of outlet orifices. Outlet nozzle may include a number of pipes having through channels, which define profiled channels or is made as head having body provided with profiled channels. ^ EFFECT: increased electrical safety of fire-extinguishing of electric equipment under voltage up to 1000 v fire with high-fog, possibility of fire suppression without electric equipment switching off, increased fire-fighting efficiency for all fire classes. ^ 6 cl, 7 dwg |
