《自动喷水灭火系统的计算书.doc》由会员分享，可在线阅读，更多相关《自动喷水灭火系统的计算书.doc（7页珍藏版）》请在金锄头文库上搜索。
1、自动喷水灭火系统的计算书1. 自动喷水灭火水力计算的基本数据1.1喷头的选择 自动喷洒灭火系统设计规范，闭式湿式自动喷水灭火系统适用范围：因管网及喷头中充水，故适用于环境温度为4700C之间的建筑物内，所以选用闭式湿式喷头。1.2根据湿式系统、预作用系统不宜超过800只；本系统设四个湿式报警阀，每个报阀组控制的最不利喷头处，都设末端试水装置，每层最不利喷头处均设直径为25mm的试水阀。1.31.3水力计算查高规，选用边墙型扩展覆盖喷头工作压力0.1Mpa为喷头最低工作压力，自动喷水灭火系统的基本设计数据见下表：火灾危险等级设计喷水强度L/(minm2)作用面积/m2喷头工作压力/MPa设计喷量
2、/(L/s)喷头间距/m每支喷头最大保护面积/m2喷头与墙柱最大间距/m中危险级61600.129.453.611.51.81） .标准喷头：选用ZSTZ-15型快速响应喷头2） 边墙型扩展覆盖喷头：选用ZSTYB-20型快速响应喷头，工作压力0.1，保护范围4.44.5m3)标准型喷头管径确定如下表表3-19 自动喷洒管径确定表喷头数1348123264公称直径(mm)DN25DN32DN40DN50DN70DN80DN1004）水力计算方案一下图为自动喷水水力计算简图下表为自动喷水水力计算表管段名称起点压力mH2O管道流量L/s管长m当量长度管径mmK水力坡降mH2O/m流速m/s损失mH
3、2O终点压力mH2O1-210.001.911.320.60251151.5913.603.0513.052-313.051.911.180.8025801.5913.603.1416.2021-2211.092.010.940.60251151.7653.792.7113.8122-313.812.010.540.8025801.7653.792.3616.173-416.203.921.402.1032801.4414.135.0521.2423-418.591.811.220.6025801.4313.412.6021.2024-419.841.870.340.6025801.5273.
4、521.4421.294-521.247.601.943.1050800.6403.583.2324.4725-2616.881.732.250.8025801.2993.253.9620.8426-520.843.640.752.1032801.2443.843.5424.3827-519.531.862.650.6025801.5033.504.8924.425-624.4713.100.433.1050801.9016.176.7131.186-731.1813.101.220.0050801.9016.172.3133.497-833.4913.102.722.1050801.9016
5、.179.1642.658-942.6513.104.230.0080800.2002.640.8543.5028-2914.662.311.320.60251152.3324.354.4819.1429-3019.142.310.930.8025802.3324.354.0323.1733-3415.472.370.940.60251152.4604.473.7819.2534-3019.252.370.780.8025802.4604.473.9023.1530-3123.174.691.382.1032802.0604.947.1830.3435-3126.722.171.170.602
6、5802.0574.093.6330.3536-3128.132.230.390.6025802.1654.202.1530.2731-3230.349.081.943.1050800.9144.284.6134.9537-3229.062.262.010.6025802.2374.265.8334.8938-3230.312.311.390.6025802.3334.364.6534.9632-934.9513.660.443.7050802.0676.438.5543.509-1043.5026.765.625.4080800.8365.399.2152.7110-1152.7126.76
7、1.840.00100800.1913.090.3553.0639-1140.002.661.761.4032800.6622.802.0942.0911-1253.0629.422.656.10100800.2313.402.0255.0912-1355.0929.421.831.10100800.2313.400.6855.7713-1455.7729.420.470.00125800.0752.220.0355.8014-1555.8029.420.023.70125800.0752.220.2856.0815-1656.0829.423.060.00125800.0752.220.23
8、56.3116-1756.3129.422.953.70125800.0752.220.5056.8017-1856.8029.420.630.00125800.0752.220.0556.8518-1956.8529.424.703.70125800.0752.220.6357.4719-2057.4729.420.690.00125800.0752.220.0557.53计算结果:所选作用面积:160.0平方米总流量:29.42 L/s平均喷水强度:11.03 L/min.平方米入口压力:57.53 米水柱水泵扬程为： H=Hr+Hz+报警阀损失+1.1= 7.43+61+5+2+57.5
9、7= 133.米水柱Hr 入口压力Hz 水泵吸入口至入口静水压（按本工程确定层高计算为61m）水泵吸入口至入口沿程及局部水头损失（管道长度+当量长度=195m,按干管管径选用DN150计算)7.43米水柱报警阀水头损失取0.04Mpa,水流指示器取0.02Mpa，方案二下图为自动喷水水力计算简图下表为自动喷水水力计算表管段名称起点压力mH2O管道流量L/s管长m当量长度管径mmK水力坡降mH2O/m流速m/s损失mH2O终点压力mH2O1-210.001.911.320.90321150.3422.010.7610.762-310.761.911.181.2032800.3422.010.81
10、11.5721-2210.311.940.940.90321150.3532.040.6510.9622-310.961.940.541.2032800.3532.040.6111.573-411.573.851.402.7040800.6593.062.7014.2723-412.501.481.220.6025800.9622.801.7514.2524-413.281.530.340.6025801.0222.880.9614.254-514.276.861.943.1050800.5223.232.6316.9025-2611.721.442.250.8025800.9022.712.
11、7514.4726-514.473.040.752.1032800.8643.202.4616.9327-513.591.552.650.6025801.0462.923.4017.005-616.9011.450.433.1050801.4515.395.1322.036-722.0311.451.220.0050801.4515.391.7623.797-823.7911.452.722.1050801.4515.396.9930.788-930.7811.454.230.0080800.1532.310.6531.4328-2914.722.321.320.90321150.5032.441.1215.8329-3015.832.320.931.2032800.5032.441.0716.9033-3415.002.340.940.90321150.5132.470.9415.9434-3015.942.340.781.2032800.5132.471.0216.9630-3116.904.651.382.7040800.9643.703.9420.8435-3118.281.801.170.60
