The water mist fire-proof shutter door is composed of a composite steel fire-proof shutter, and a water pipe and control system are arranged on one side of the transmission device. By using a tangential vortex nozzle, the water is atomized to about 0.1 mm of water droplets, sprayed to the curtain surface, and forced cooling is carried out on the curtain surface. Compared with the ordinary steel fire-proof curtain on both sides of the curtain with an independent closed automatic sprinkler system, water consumption can be saved. The utility model retains the advantages of the composite steel fire proof shutter. The water mist cools the curtain surface. Within 3 h of the fire resistance limit, the back fire surface temperature of the curtain surface is below 200℃, which ensures the heat insulation ability of the fire proof shutter instead of the firewall. It is a product with strong vitality.
Make full use of the heat of heat absorption and vaporization of water, make the curtain cooling effect obvious. By making full use of the heat of heat absorption and vaporization of water, the cooling effect of curtain surface is obvious, the effect of eliminating fire smoke is good, and water vapor can effectively protect the transmission device of fire prevention curtain.
Suitable for industrial and civil buildings with no automatic spray fire prevention area separation ≦140℃ average temperature rise ,180℃ maximum temperature rise) and fire resistance limit ≧3. Oh).
The optimum water supply pressure is 0.30 Mpa, arranged to the side of the rolling curtain, and the water distribution strength ≥0.20 m3/h.m2.; and
The distance between nozzle and curtain is 300 mm~400 mm, and the distance between nozzle and curtain surface is 600 mm~700 mm.
(3) The pressure test of the water mist system shall be able to withstand 1.5 times the rated working pressure, and the test time shall be 5 min, without leakage and deformation.
(4) The water supply pipe of the water mist system shall be of galvanized steel pipe or stainless steel pipe with a diameter not less than φ15mm, usually installed close to the box cover or ceiling.
