| 摘要 |
FIELD: isolation of mine workings in fighting fires in coal mines. SUBSTANCE: device for isolation of troubled district in underground mining is installed in working and boxes are thrown towards wall. With the use of wire, explosive charges are ignited. Formed gases from combustion chamber through heat-exchange tubes and perforations are bubbling into liquid nitrogen filling the heat insulated vessel. Gas mixture produced after nitrogen evaporation flows through throat inside forms coiled in roll. Under the action of compressed gases the roll is uncoiled to form inflated partition which is then reinforced by supplying through connector of rapidly hardening filler. EFFECT: extended range of operation capabilities of device in insulation of troubled districts under conditions of time deficit and explosion hazard, higher safety in fire fighting. 2 cl, 2 dwg |
