Hefei? Super fire shutter doors

Super fire shutter doors fire shutter doors introduced compared with the general shutter doors, it is in a higher fire safety requirements, to meet the national standard GB 14102-2005 normative standards TF3 fire rating requirements, the products are widely used in various industrial and civil and public buildings fire back surface temperature measurement requirements, require low pressure against places such as separate fire district offices, supermarkets, commercial buildings, exhibition halls, underground garages, entertainment and other buildings. According to standard provision in order to fire back surface temperature rise of determination conditions, fire resistance of greater than 3H as super fire shutter fire shutter. Fire shutter doors Category 1 Mist-style steel and evaporative Mist fire shutter curtain surface of these two types of single plate steel fire shutter identical, the former in the middle of each of the series at the festival screens films plus a drill There are holes in the thin-walled pipe, the end curtain in the second set two root soft rubber surface and thin-walled steel phase. When a fire occurs, the water inflow pipe through the inner rubber hose and leak out from the hole, heat of vaporization, absorb and remove heat slats to make it cool. The latter is in the unexposed side slats to set up a steel pipe, the pipe dense drill holes, when fire, water spilled through holes in the curtain-chip shot, down the river, heat, evaporation, curtain sheet to cool. These two types of super fire shutter, although able to meet regulatory requirements, but there are flaws: ① water in a thin stream injection, flowing water more big fire water required per unit of time; ② holes on steel pipes, small aperture, usually do, a long time easy to produce rust blockage, so spray uneven influence of aging; ③ Mist type steel super fire shutter doors hose easy to aging, repeated bending easily damaged. ④ must have independent fire water tanks and water pipes, and can meet 3h per square 0.9L water requirements, the high cost of such a structure, so the higher the vapor mist type steel super fire shutter prices and costs. 2. The track dual screens super fire shutter inorganic compound fire shutter doors that belong to the two-track double curtain structure with a certain thickness of the air layer between the two screens side. Each piece of curtain surface consists of three layers of composite material consisting of: by the fire side with the British Terai fireproof refractory cloth, unexposed surface using heat radiation cloth or other refractory cloth, an intermediate insulating layer selection of specially treated aluminum enhanced refractory fiber blanket, curtain side thickness 10 ~ 20mm. Curtain surface transversely through a long thin strip 300 ~ 600mm; curtain side longitudinal set of stainless steel wire rope 2mm order 1500mm; anti-negative pressure in the rail is provided at both ends of curtain-reinforced steel, increasing the gap "T" type structure, negative pressure generated when the curtain to prevent fires caused by falling from the rail surface phenomenon. The fire shutter good heat insulation, fully meet the "high regulation" requirement, without the protection of water, is a new super fire shutter. Many places have been widely applied. The fire shutter there is a problem in the course learned: ① selection problem: that is a fire curtain surface material surface, the material should be used in temperature reached 1100 ℃, and now some manufacturers use is to use a temperature lower than 1000 Materials ℃ even without fireproof refractory ceramic fiber cloth surface material by the fire, we can not guarantee the safety of use; b. curtain cloth surface heat radiation, and some manufacturers canceled this layer, and no corresponding increasing the thickness of insulation or air layer, so that the total heat capacity decrease fire shutter; intermediate insulation c curtain surface, and some products are not of sufficient thickness; d curtain surface finishing materials, some using the general retardant cloth, no fire, no fire-resistant, do not wear, short life; sewing e curtain side, some manufacturers use conventional sewing curtains or the sewing plane, but not selected high temperature sewing thread . So that when the fire curtain side effect easily fall apart off-line, can not make full fire curtain surface insulation properties; f curtain plane reinforcing wire rope, it will gradually corroded due to fire shutter life. ② design issues and some products defective design or product design itself there is a big flaw. ③ manufacturing production processes to facilitate installation, but the installation steps complex, the need for installers require more seriously and patiently installation. ④ Structure double curtain track structure is complicated, and the mechanical transmission part of each jamb shutter need two sets, the two-track double curtain inorganic super fire shutter prices relatively moderate cost, and without water spray protection zero, so widely used in civil engineering building fire shutter installation project. ⑤ security issue full of inorganic fibers fire shutter the lack of effective anti-theft feature. 6 more use of the area occupied by the fire shutter total thickness of about 450mm ~ 500mm, it can not be arranged below the business showcase, stack anything on the effective use of space occupied, the price per unit area of ??the mall are high, this is not the business willing. Some works in the installation will close the double curtain track, the air layer between two slats greatly reduced, heat capacity of the entire inorganic fire shutter also significantly reduced, so that the fire separation compromised. ⑦ other problem is more difficult to achieve a more upscale interior modern building requirements on the outer surface of the fire shutter covert decoration; both sides of the curtain side are equipped with motors and other gear, effective fire protection gear when the fire needs to be further Discussion; durability curtain surface that is a reasonable service life, remains to be seen. 3. mist-type fire shutter recent years, the domestic emergence of a novel, the structure is simple and obvious effect of the new fire shutter - "mist-type fire shutter" [patent number: 9822962.5]. The shutter by a single plate steel fire shutter, and a uniform installation of water pipes and spray nozzle control system is arranged in the transmission side. It retains the advantages of a single plate steel fire shutter, make the curtain surface with water mist to cool in the fire resistance of 3h, side curtain fire back surface temperature are below 100 ℃, to ensure that the fire shutter alternative use of firewalls heat capacity, is a strong viable product. Mist-type fire shutter also has the following characteristics: ① full use of heat and the heat of vaporization of water, make the curtain surface cooling effect. A certain pressure of water (0.25 ~ 0.4MPa), through the "tangential swirl" type nozzle, the water atomization resolution is 0.1 mm in diameter around the small water droplets, face toward the curtain. As the water surface area is increased, heat quickly evaporate quickly (heat of vaporization of water is about 2700 kcal / kg) will face the heat curtain away quickly. Almost no excess water flowing down, but also reduces water loss arising after fire fighting. ② water density little after numerous tests to detect, "mist" type of water density of about 0.101 ~ 0.125 L / s. m, is located on both sides of an ordinary fire shutter automatic sprinkler system water density of 1 / 8-1 / 10, which provides fire separation affordable larger space for the application to article 2.1, for example, in the automatic escalator surrounded by mist-type setting super fire shutter, fire water per unit time is only 6.2L / s ~ 7.8L / s. Thus the use of fire hydrant water, fire water balance using the original, or an appropriate selection of the larger size of the fire pumps to solve the problem, the project investment savings, economic benefit. ③ eliminate mist fire smoke have a good effect to eliminate smoke, reduce the role of the ambient temperature within the range of mist created a favorable environment evacuation, people awake, breathe, good vision, reduce fire staff casualties. ④ water vapor can effectively protect the fire shutter actuator when the spray of fire, fire above the curtain is surrounded by steam, hinders combustion, protecting the electrical transmission in the fire resistance of normal operation time.