【《南昌某酒店建筑消防水系统设计计算过程案例》5300字】

南昌某酒店建筑消防水系统设计计算过程案例目录TOC\o"1-3"\h\u4780南昌某酒店建筑消防水系统设计计算过程案例 15651.1高层建筑消防参数 1241301.2消火栓给水系统 2251701.2.1室内消火栓管道布置 212611.2.2消防水池 2272441.2.3屋顶消防水箱 2316431.2.4水泵接合器 239541.2.5消火栓系统水力计算 2197071.2.6消火栓加压水泵的选择 5182111.2.7增压稳压设备 598731.3自动喷淋系统 6112731.3.1喷头 6184411.3.2湿式报警阀 6265581.3.3末端试水装置 66911.3.4水流指示器 610281.3.5水泵接合器 620981.3.6自动喷水系统管网布置 7100391.3.7自动喷淋系统水力计算 7152741.3.8自动喷淋系统选泵 1833861.3.9减压孔板计算 183831.3.10增压稳压设备 191.1高层建筑消防参数1.建筑类别以及火灾危险等级的确定本设计建筑高度超过50m，因此属于一类公共建筑。本设计火灾危险等级属于中危险级I级。2.同一时间内的火灾次数本设计设计人口在25000人以下，因此同一时间内的火灾次数为一次。3.火灾延续时间自动喷水灭火系统的火灾延续时间按1h计，消火栓系统的火灾延续时间按3h计。1.消火栓用水标准本设计属于一类高层公共建筑，且建筑高度大于50m，因此室内消火栓用水量为40L/s，同时使用消防水枪支数为8支，每根竖管最小流量为15L/s。由于本设计为高层公共建筑，且建筑体积V＞50000m3，因此室外消火栓用水量为40L/s。5.自动喷水灭火系统消防用水量本设计建筑属于中危险级I级，作用面积为160m2，设计喷水强度为6L/(min•m2)，自动喷水灭火系统的用水量为：计算用水量：QL=（160×6）/60=16.00L/s设计用水量：Q=1.3QL=1.3×16.00=20.80L/s（留有30%的余量）1.2消火栓给水系统消防给水系统在消火栓栓口处静压大于100mH2O时必须分区供水。而本设计建筑屋顶标高为83.25m，因此消防给水系统不分区。1.2.1室内消火栓管道布置设计的酒店主体部分，消火栓在20层吊顶成环状管网。21层和屋面与主体布置不同，应单独设计。在消防电梯的前室设置检查用消火栓。室内消防给水管网上用阀门分段，以便检修。R=C∙式中：C——0.8；Ldh——3m。消火栓保护半径为19m，消火栓栓口装置距离地面1.1m。1.2.2消防水池V本设计中，消防水池有效容积为218.88m3，设计取280m3，尺寸为L×B×H=16×5×3.5m，有效水深3m。取进水管管径为150mm，管内流速取1.2m/s，则进水流量为76.34m3/h，补水时间为3.14h。1.2.3屋顶消防水箱消火栓系统室内消防用水40L/s，自动喷淋系统用水量20.8L/s，室内消防用水总量为60.8L/s，则计算屋顶消防水箱贮水量前10分钟的室内消防用水，为10×60×60.8=36480L=36.48m3，设计中取40m3。水箱由不锈钢板拼接而成，有效水深2.0m，尺寸为L×B×H=5×4×2.5m。1.2.4水泵接合器单个水泵接合器的流量为15L/s，而本设计室内消火栓用水量为40L/s，因此设置3个型号为SQS150的水泵接合器,。1.2.5消火栓系统水力计算消火栓系统为环状管网，断开某一管段，最不利消防竖管XL-7出水枪3支，XL-4出水枪3支，XL-3出水枪2支，每支水枪的最小流量为5L/s。图1.1水力计算简图消火栓采用同一型号，水带材质选择衬胶。最不利栓口11处水枪喷口处所需水压：H式中：afHm𝜑——取0.0097。因此计算得水枪喷口所需压力为185.62kPa，即18.56mH2O。水枪喷口的出流量按下式计算：q水带水头损失按照下列公式计算：h式中：Az计算得：水带水头损失为10.07kPa，即1.01mH2O。消火栓口所需水压为：H消火栓动压应≥0.35Mpa，因此本设计取0.35Mpa。结合qxh=Bq10处：Hxh10算出10处qxh表1.2消火栓计算表qxhH消火栓L/sm5.4135.00117.4238.84107.9341.0395.4138.50147.4238.84137.5940.53125.4142.00168.1045.8415表1.3消火栓管道水力计算简表计算管段设计秒流量L/s管长管径DN流速v水力坡度i水头损失ilL/smmmm/skPa/mkPa11~105.413.50100.000.690.100.3410~912.833.50100.001.630.481.699~620.7660.95150.001.170.169.9614~135.413.50100.000.690.100.3413~1212.833.50100.001.630.481.6912~720.4357.45150.001.160.169.1116~155.413.50100.000.690.100.3415~813.5153.95100.001.720.5328.658~713.519.49150.000.760.070.707~633.931.07150.001.920.411.656~551.705.90200.001.740.241.435~451.703.50200.001.740.240.854~351.7069.24200.001.740.2416.763~251.7013.45200.001.740.243.262~151.7072.84200.001.740.2417.63最不利消火栓的管路总水头损失为51.91kPa。最不利消火栓栓口动压为350kPa，而消防水池最低水位标高为-5.2m，栓口标高为80.05m，消火栓给水系统系统所需总水压为：Hx若消火栓栓口动压力大于0.50MPa，则需要采用稳压减压消火栓，计算表格如下。表1.4消火栓管道水力计算简表楼层栓口标高栓口处压力估算-1-1.60117.5311.10111.0326.60110.53夹层11.40107.03313.55103.53417.05100.03520.5596.53621.0593.03727.5589.53831.0586.03931.5582.531038.0579.031141.5575.531245.0572.031348.5568.531452.0565.031555.5561.531659.0558.031762.5551.531866.0551.031969.5547.532073.0541.032176.5538.84屋面80.0535.00自18层以下都需要用稳压减压消火栓。1.2.6消火栓加压水泵的选择加压泵流量应根据室内消火栓用水51.70L/s，水泵扬程可按下式计算：H=经过计算，水泵扬程H=85.25+35+5.19+2.00=127.44m。设计选用两台额定流量为50L/s，电机功率为90kW，扬程为135m的型号为XBD13.5/50G-L的消防水泵，一用一备。1.2.7增压稳压设备最不利点消火栓栓口高程为76.55m，而高位水箱最低水位标高为80.55m，则最不利点消火栓栓口的静水压力为80.55-76.55=1.0m<7.0m，需设增压稳压设备，具体见自动喷淋系统部分。1.3自动喷淋系统本设计采用湿式系统。自动喷淋系统与消火栓系统共用同一个消防水池和高位消防水箱。1.3.1喷头本设计为酒店，因此选择玻璃球洒水喷头，南昌市环境最高温度大约38℃，因此选择红色玻璃球闭式喷头。其公称动作温度宜高于环境最高温度30℃。图1.2喷头布置要求1.3.2湿式报警阀地下室喷头数为248个，一层喷头数为233个，二层喷头数为246个，宴会厅上层喷头数为77个，夹层喷头数为202个，三层至二十层的喷头数为111个，二十一层喷头数为46个。因此一个湿式报警阀最多控制800只喷头，因此共设置四个湿式报警阀，地下室、一层、二层、宴会厅上空为一区，夹层、三至七层为二区，八至十四层为三区，十五层至二十一层为四区，因此共设置四组湿式报警阀组，选用ZSFZ-150型。报警阀距地面的高度为1.2m。1.3.3末端试水装置设在每个报警阀组控制的最不利点喷头处，管径为25mm。1.3.4水流指示器设置自动喷淋系统的每个楼层均设水流指示器。1.3.5水泵接合器自动喷淋系统设计流量为20.8L/s，因此设置两个水泵接合器。1.3.6自动喷水系统管网布置配水管直径≥25mm。各配水管入口压力大于0.4MPa，采用减压孔板以均衡各层管段流量和压力。水平管道设有3‰坡度。报警阀组前管道设置为环状，阀后管道为枝状。管材采用内外壁热镀锌钢管。1.3.7自动喷淋系统水力计算选择特性系数法：q=Kh=AL1.地下室喷淋系统图1.3地下室喷淋计算草图表1.5横支管节点计算节点编号喷头流量系数喷头处水压（mH2O）喷头出流量（L/s）10.4210.001.3320.4211.851.4530.4211.021.574*0.4211.021.57表1.6横支管管段计算管段编号管段流量（L/s）管长（m）管径（mm）管内流速（m/s）比阻水头损失(mH2O)1~21.332.40252.710.43671.852~32.773.00323.450.093862.173~41.351.65403.460.044531.394~58.692.70501.430.011082.265~617.383.30803.460.0011681.166~720.803.30801.140.0011681.677~820.801.15801.140.0011680.588~920.803.001002.650.00026740.359~1020.802.701002.650.00026740.3110~1120.802.701002.650.00026740.3111~1220.802.751002.650.00026740.3212~1320.800.351002.650.00026740.0413~1420.802.501501.180.000033950.0414~1520.803.601501.180.000033950.0515~1620.800.751501.180.000033950.0116~1720.801.931501.180.000033950.0717~1820.803.351501.180.000033950.0518~1920.802.401501.180.000033950.0419~2020.801.701501.180.000033950.0220~2120.803.201501.180.000033950.0521~2220.805.251501.180.000033950.0822~2320.802.751501.180.000033950.0423~2420.802.601501.180.000033950.042.一层喷淋系统图1.4一层喷淋计算草图表1.7横支管节点计算节点编号喷头流量系数喷头处水压（mH2O）喷头出流量（L/s）10.4210.001.3320.4211.851.4530.4211.021.574*0.4211.021.57表1.8横支管管段计算管段编号管段流量（L/s）管长（m）管径（mm）管内流速（m/s）比阻水头损失(mH2O)1~21.332.40252.710.43671.852~32.773.00323.450.093862.173~41.351.65403.460.044531.394~58.692.70501.430.011082.265~617.383.30803.460.0011681.166~720.803.30801.140.0011681.677~820.801.15801.140.0011680.588~920.803.001002.650.00026740.359~1020.802.701002.650.00026740.3110~1120.802.701002.650.00026740.3111~1220.802.751002.650.00026740.3212~1320.800.351002.650.00026740.0413~1420.802.501501.180.000033950.0414~1520.803.601501.180.000033950.0515~1620.800.751501.180.000033950.0116~1720.801.931501.180.000033950.0717~1820.803.351501.180.000033950.0518~1920.802.401501.180.000033950.0419~2020.801.701501.180.000033950.0220~2120.803.201501.180.000033950.0521~2220.805.251501.180.000033950.0822~2320.802.751501.180.000033950.0423~2420.802.601501.180.000033950.043.二层喷淋系统图1.5二层喷淋计算草图表1.9横支管节点计算节点编号喷头流量系数喷头处水压（mH2O）喷头出流量（L/s）10.4210.001.3320.4211.171.5830.4211.681.6140.4216.501.7150.4217.551.7660.4219.631.8670.4221.141.9380.4223.382.03表1.10横支管管段计算管段编号管段流量（L/s）管长（m）管径（mm）管内流速（m/s）比阻水头损失(mH2O)1~21.335.41252.710.43671.172~32.910.65323.620.093860.523~41.522.00403.600.044531.824~57.931.50501.040.011081.055~69.692.00501.940.011082.086~713.412.90703.480.0028931.517~817.272.60701.490.0028932.248~920.802.72801.140.0011681.379~1020.800.88801.140.0011680.4410~1120.802.80801.140.0011681.4111~1220.800.98801.140.0011680.5012~1320.802.22801.140.0011681.1213~1420.801.15801.140.0011680.5814~1520.802.05801.140.0011681.0415~1620.806.23801.140.0011683.1516~1720.806.00801.140.0011683.0317~1820.801.801002.650.00026740.5618~1920.806.631002.650.00026740.7719~2020.801.931002.650.00026740.2220~2120.809.501501.180.000033950.1421~2220.802.501501.180.000033950.0422~2320.801.201501.180.000033950.0223~2420.801.301501.180.000033950.0224~2520.803.101501.180.000033950.0525~2620.802.001501.180.000033950.0326~2720.806.661501.180.000033950.1027~2820.803.601501.180.000033950.0528~2920.801.501501.180.000033950.0229~3020.802.661501.180.000033950.0430~3120.801.901501.180.000033950.0331~3220.801.151501.180.000033950.021.宴会厅喷淋系统图1.6宴会厅喷淋计算草图表1.11横支管节点计算节点编号喷头流量系数喷头处水压（mH2O）喷头出流量（L/s）10.4210.001.3320.4212.201.4730.4211.291.5940.4216.721.7250.4217.901.7860.4219.861.8770.4222.862.0180.4221.182.07表1.12横支管管段计算管段编号管段流量（L/s）管长（m）管径（mm）管内流速（m/s）比阻水头损失(mH2O)1~21.332.85252.710.43672.202~32.792.85323.480.093862.093~41.382.85403.490.044532.444~56.102.85503.110.011081.175~67.882.85501.010.011081.966~79.752.85501.960.011083.007~811.763.30703.050.0028931.328~920.802.75801.140.0011681.399~1020.802.75801.140.0011681.3910~1120.802.75801.140.0011681.3911~1220.802.751002.650.00026740.3212~1320.802.751002.650.00026740.3213~1420.802.751002.650.00026740.3214~1520.802.751002.650.00026740.3215~1620.802.751501.180.000033950.0416~1720.802.751501.180.000033950.0417~1820.8035.151501.180.000033950.525.夹层喷淋系统图1.7夹层喷淋计算草图表1.13横支管节点计算节点编号喷头流量系数喷头处水压（mH2O）喷头出流量（L/s）10.4210.001.3320.4211.251.592*0.4215.211.6430.4219.931.8840.4221.631.9550.4221.042.06表1.14横支管管段计算管段编号管段流量（L/s）管长（m）管径（mm）管内流速（m/s）比阻水头损失(mH2O)1~21.335.52252.710.43671.252~2*2.911.20323.620.093860.962*~36.192.77401.930.044531.733~413.693.13703.560.0028931.704~515.643.40701.060.0028932.415~620.801.20801.140.0011682.126~720.802.40801.140.0011681.217~820.800.95801.140.0011680.488~920.801.45801.140.0011680.739~1020.801.34801.140.0011680.6810~1120.801.06801.140.0011680.5411~1220.802.60801.140.0011681.3112~1320.802.60801.140.0011681.3113~1420.805.28801.140.0011682.6714~1520.806.071002.650.00026740.7015~1620.800.901002.650.00026740.1016~1720.802.151002.650.00026740.2517~1820.803.181002.650.00026740.3718~1920.801.401002.650.00026740.1619~2020.801.501002.650.00026740.1720~2120.802.901002.650.00026740.3421~2220.801.731501.180.000033950.0722~2320.802.701501.180.000033950.0423~2420.803.051501.180.000033950.0424~2520.803.301501.180.000033950.0525~2620.803.301501.180.000033950.0526~2720.801.401501.180.000033950.0227~2820.801.001501.180.000033950.0128~2920.802.851501.180.000033950.0429~3020.800.801501.180.000033950.0130~3120.803.831501.180.000033950.0631~3220.805.321501.180.000033950.0832~3320.802.451501.180.000033950.0433~3420.802.701501.180.000033950.0434~3520.802.191501.180.000033950.0335~3620.802.001501.180.000033950.0336~3720.801.841501.180.000033950.036.三层喷淋系统图1.8三层喷淋计算草图表1.15横支管节点计算节点编号喷头流量系数喷头处水压（mH2O）喷头出流量（L/s）10.4210.001.3320.4212.771.5030.4215.181.6440.4218.021.7850.4218.601.8160.4219.351.85表1.16横支管管段计算管段编号管段流量（L/s）管长（m）管径（mm）管内流速（m/s）比阻水头损失(mH2O)1~21.333.60252.710.43672.772~32.833.20323.520.093862.403~41.473.20403.550.044532.844~56.251.34503.180.011080.585~69.870.70505.030.011080.766~720.803.80801.140.0011681.927~820.803.40801.140.0011681.728~920.801.60801.140.0011682.329~1020.800.25801.140.0011680.1310~1120.803.401002.650.00026740.3911~1220.801.801002.650.00026740.5612~1320.802.451002.650.00026740.2813~1420.800.851501.180.000033950.0114~1520.800.251501.180.000033950.0015~1620.801.651501.180.000033950.0716~1720.803.351501.180.000033950.0517~1820.800.651501.180.000033950.0118~1920.801.001501.180.000033950.0619~2020.801.201501.180.000033950.0220~2120.803.801501.180.000033950.067.四至二十层喷淋系统图1.9标准层喷淋计算草图表1.17横支管节点计算节点编号喷头流量系数喷头处水压（mH2O）喷头出流量（L/s）10.4210.001.3320.4212.771.5030.4215.181.6440.4218.021.7850.4218.601.8160.4219.351.85表1.18横支管管段计算管段编号管段流量（L/s）管长（m）管径（mm）管内流速（m/s）比阻水头损失(mH2O)1~21.333.60252.710.43672.772~32.833.20323.520.093862.403~41.473.20403.550.044532.844~56.251.34503.180.011080.585~69.870.70505.030.011080.766~720.803.80801.140.0011681.927~820.803.40801.140.0011681.728~920.801.60801.140.0011682.329~1020.800.25801.140.0011680.1310~1120.803.401002.650.00026740.3911~1220.801.801002.650.00026740.5612~1320.802.451002.650.00026740.2813~1420.800.851501.180.000033950.0114~1520.800.251501.180.000033950.0015~1620.801.651501.180.000033950.0716~1720.803.351501.180.000033950.0517~1820.800.651501.180.000033950.0118~1920.801.001501.180.000033950.0619~2020.801.201501.180.000033950.0220~2120.803.801501.180.000033950.068.二十一层喷淋系统图1.10二十一层喷淋计算草图表1.19横支管节点计算节点编号喷头流量系数喷头处水压（mH2O）喷头出流量（L/s）10.4210.001.3320.4210.921.3930.4211.721.6140.4221.761.9650.4221.122.0660.4225.012.10表1.20横支管管段计算管段编号管段流量（L/s）管长（m）管径（mm）管内流速（m/s）比阻水头损失(mH2O)1~21.331.20252.710.43670.922~31.102.40325.100.093863.803~47.3311.84503.730.011087.044~59.292.46501.730.011082.355~611.352.40702.950.0028930.896~715.551.02803.090.0011681.147~820.800.90801.140.0011680.458~920.800.60801.140.0011680.309~1020.802.671002.650.00026740.311.3.8自动喷淋系统选泵加压泵流量为20.80L/s，加压泵扬程可计算得，具体见下表：表1.21分区所需扬程m高程差m水损m最不利喷头压力m一区52.9518.0521.9010二区66.1031.552