subject: Topical Application Of Automatic Sprinkler System Design And Application - Sprinkler System, [print this page] Topical application of automatic sprinkler systems may also be known as the simple sprinkler system, automatic sprinkler system is an effective supplement form. It is mainly used in the existing urban water supply pipeline as a source of fire, take some Technology Means to reduce the original system, although some components, but also achieve the wet system with the same or similar effect, thereby saving costs.
An automatic sprinkler system, the application of topical application.
Under "automatic sprinkler system design" (GB50084-2001) the provisions of Chapter 12, the applicable maximum headroom in the room no more than 8 meters in civil construction, local settings and the total area of protected areas is not more than 1000 square meters of wet systems, and according to Ministry of Public Security issued "stay with the production, storage management combined with technical requirements for Fire Safety" GA703-2007 the relevant provisions, also pointed out that the requested accommodation and the production of one or more of storage management, etc. Mixed-use connectivity settings in the same place within the applicable space simple sprinkler system.
In the actual process of using local application systems are used for some inherent to the lack of pools, pumping stations, and can not be transformed within a small song and dance entertainment, the area is generally not more than 500 square meters, such as Internet cafes, dance hall, skating rink, etc., also apply more fuel is operating more Fire More dangerous and relatively small concentration of outlets, small shops and some possible "triple play" situation of commercial and residential. These buildings as historical reasons, although the reach of the state regulations set the standard sprinkler system, but in fact, or by funding restrictions, or subject to site constraints, can not really applicable to the construction of wet system, we can only use local application system to solve the fire problem.
Second, local application of automatic sprinkler system design and construction of the issues that need attention.
1, should be noted that wet sprinkler system with the difference: First, the selected Sprinklers And duration of different general systems, due to restrictions on use of space, according to "ensure adequate water density before the fire brigade to ensure adequate fire fighting reinforcements into the area and continued to spray water-jet time" principle, simple system of choice is rapid response sprinklers, the strength of the dangerous level in accordance with the provisions of grade place, not less than 6L/min, and its continued spraying time was not less than 0.5h. General system duration is usually between 1-2h. Secondly, the need for water source. Local system to use indoor Fire Hydrant Water, if not meet water requirements, or from the city water supply network or natural water sources to be added, combined with the regulation of indoor fire facilities Pump And pipelines, significant savings in cost, easy to promote. Finally, different alarm control unit. Reference to the U.S., "Automatic sprinkler system installation standards" NFPA-13 in the regulations, small-scale systems can be directly omitted alarm Valve Group, such as using K = 80 the total number of nozzles and its not more than 20 or with K = 115 and not more than 12 of its total system, using only the pressure switch can control the fire pumps, and electric alarm alarm available. Other systems generally use local settings to normal wet alarm valve controlling that is able to meet the requirements.
2, in the actual construction process of the two requirements that must be reached: First, as the role of insufficient size, it should be strictly in accordance with the provisions of the nozzle selection and arrangement, so as to help protect the site personnel evacuation, control of fire . When using the flow coefficient K = 80 when the fast response sprinklers, the sprinkler heads in the risk level according to the provisions of grade place to protect an area of more than 300 times, the role of area by open nozzle to determine the number of 10. When using K = 115 of the quick response sprinklers, the same water distribution branch pipe nozzle spacing and the largest water distribution tube is adjacent to the largest spacing, arrangement should not exceed 4.4 meters square, rectangle side should not exceed more than 4.6 meters long, the role of area nozzle by opening not less than six determined. Second, because most of the management of local water systems are municipal fire hydrant pipeline network, so when the suction from the water pipe network, the result of seasonal and diurnal changes into account, the water head of municipal pipe network should be the peak of the annual minimum water pressure calculation.
