某工廠室外消防平面圖

設(shè)計說明書室外消防設(shè)計依據(jù)建筑設(shè)計防火規(guī)范GB50016-2006建筑給水排水設(shè)計規(guī)范GB50015-2003給水排水設(shè)計手冊第2冊建筑給水排水工程概況建筑物層數(shù)面積（立方米）類別室外消防水量（LL/S）室外消火栓個數(shù)辦公樓3360二級民用15綜合樓3360二級民用152廠房328080二級丙類302宿舍5790二級民用202同一時間發(fā)生火災次數(shù)一次廠房火災持續(xù)時間3小時，其他為2小時廠房的用水量最大n=Q/q+NQ：n室外消火栓個數(shù)Q：室外消防用水量，N水泵接合器個數(shù)，，q室外消火栓出水量15L/m水力計算室外消防給水系統(tǒng)最不利點消火栓栓口最低壓力HS =HP+Hq+hdHS室外最不利點消火栓栓口最底壓力HP消火栓地面和最高屋面的靜水壓,Hq19mm水槍充實水拄不小于5L/S時水槍噴嘴所需的水壓hd寸膠水帶直經(jīng)DN65，長120m,Q=5L/S時消防水帶的水損hd=AzLdq2xh=0.00172*120*52=5.16mHS=15+15.4+5.16+2=37.56m最不利管段水損計算管段(節(jié)點)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當一處水源給水中斷時的最不利管段計算假設(shè)8出中斷管段(接點)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當廠房起大火6，7，9，10四個消火栓同時使用時的核算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選擇IS125-100250B型號的水泵3臺2用一備其揚程60，流量48.06L/S.不設(shè)消防水池直接從市政管網(wǎng)吸水廠方的生活給水最不利給水管水頭損失計算管段(接點)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