某工厂室外消防平面图

设计说明书室外消防设计依据建筑设计防火规范GB50016-2006建筑给水排水设计规范GB50015-2003给水排水设计手册第2册建筑给水排水工程概况建筑物层数面积（立方米）类别室外消防水量（LL/S）室外消火栓个数办公楼3360二级民用15综合楼3360二级民用152厂房328080二级丙类302宿舍5790二级民用202同一时间发生火灾次数一次厂房火灾持续时间3小时，其他为2小时厂房的用水量最大n=Q/q+NQ：n室外消火栓个数Q：室外消防用水量，N水泵接合器个数，，q室外消火栓出水量15L/m水力计算室外消防给水系统最不利点消火栓栓口最低压力HS =HP+Hq+hdHS室外最不利点消火栓栓口最底压力HP消火栓地面和最高屋面的静水压,Hq19mm水枪充实水拄不小于5L/S时水枪喷嘴所需的水压hd寸胶水带直经DN65，长120m,Q=5L/S时消防水带的水损hd=AzLdq2xh=0.00172*120*52=5.16mHS=15+15.4+5.16+2=37.56m最不利管段水损计算管段(节点)Hm(m)Q(l/s)DN1000iV(m/s)L(m)H(m)937.56155-91510060.21.7330.5081.83651037.56155-101510060.21.7325.911.56540.96304-53015030.51.5997.0992.962443.922-43015030.51.5976.9432.3467246.272-13015030.51.5916.080.49147当一处水源给水中断时的最不利管段计算假设8出中断管段(接点)Hm(m)Q(l/s)DN1000iV(m/s)L(m)H(m)737.56156-7151508.120.7443.550.3536637.913305-6301501.5930.564.021.527539.8671-5301501.5930.5190.125.798145.67当厂房起大火6，7，9，10四个消火栓同时使用时的核算937.56155-91510060.21.7330.5081.83651037.56155-101510060.21.7325.911.56737.56156-7151500.748.1243.550.3536637.913305-6301501.5930.564.0251.527543.265-1601503.02110190.12220.9164选择IS125-100250B型号的水泵3台2用一备其扬程60，流量48.06L/S.不设消防水池直接从市政管网吸水厂方的生活给水最不利给水管水头损失计算管段(接点)Hm(m)Q(l/s)DNV(m/s)1000iL(m)H(m)1-220.42201.1886.60.910.07882-32.0790.6250.9138.580.8940.03453-72.1130.73320.7420.423.7860.0772.196-72.1130.73320.7420.420.2750.00562.118672.197-81.2321.0337.080.350.01482.2048-91.2400.7214.583.90.056892.269-101.697401.0227.054.50.122102.38210-112.078500.813.0110.0131112.411-122.078500.813.012.10.027132.42713-14