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高層建筑屋頂消防水箱淺議

時間:2014-11-17 21:37   編輯:盈彩彩票APP下载

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一、消防水箱的容積計算

duiyuxushexiaofangshuixiangdexitong,qizhushuiliangshouxianyingmanzuxiaofang10min(fenzhong)shineiyongshuiliang。weibianyuweihu、guanli,shejishixiguanzuofashijiangshenghuo、xiaofangheyongshuixiang。duiyuheyongshuixiang,qiyouxiaorongjiyingmanzu:v=vt+vs+vf+vx,qizhongvt(m^3)weishenghuoyongshuiliang,vs(m^3)weishenghuodiaojieshuiliang,vf(m^3)weigaofengfuhechubeishuiliang,vx(m^3)weixiaofangyongshuiliang,qizhongvx=q600/1000,qweishineixiaohuoshuanhuozidongpenshuimiehuoxitongshejiyongshuiliang(sheng/miao)。ruoshineixiaohuoshuanyuzidongpenshuixitongshuixiangdandushezhishi,qirongliangyingmanzugeziyaoqiu。dangshineixiaohuoshuanyuzidongpenshuixitonggongyongyigexiaofangshuixiangshi,genju《zidongpenshuimiehuoxitongshejiguifan(gbj84—85)》deguifanshuoming,qixiaofangyongshuiliangkebuxiaoyu18lifangmi。yinweizaitongyijianzhuwunei,huozaifashengshi,yibanshizaishineixiaohuoshuantourushiyongzhiqian,zidongpenshuixitongkaishiqidongpentoumiehuo,ruomeizhipentouanliuliang1.331/sjisuan,kegong23gepentou10minxiaofangyongshuiliang,huo2zhishuiqiang15gepentou10minyongshuiliang,fuhepujiuchuqihuozaideyaoqiu。duiyucaiyongfenqugongshuidexitong,ruocaiyongbinglianfangshi,zemeiqushuixiangxiaofangshuiliangrongjiyinganshangshijisuan;duiyucaiyongchuanlianfangshigongshuixitong,cishideshuixiang,chubaozhengdiquxiaofang10minyongshuiliangwai,zhuyaohuanyingqishangyiqushuichidezuoyong,qixiaofangchushuiliangyingmanzugaiquhuozaiyanxushijianneiyongshuiliangjiq=(q1t1+q2t2)-q3t3,(q1、q2、q3weishineixiaohuoshuan、zidongpenshuixitongshejiliuliangjishuixiangbushuiliuliang,t1、t2、t3weiguifanguidingdehuozaiyanxushijianjibushuishijian),tongshi,huanyingmanzugaiqushenghuoyongshuixuyao。weilequebaoxiaofangyongshuiliangbubeinuozuotayong,shuixiangchushuiguanyaocaiquyidingdejishucuoshi,yibanqingkuangxia,shenghuo、xiaofangchushuiguanyingdandushezhi,bingzaishenghuoyongshuichushuiguanshangcaiqupohuaihongxifahekongzhishuiweifa。rutusuoshi。duiyugaoduchaoguo50mdejianzhu,shineixiaofanggongshuixitongmeiquyishelianggeshuixiang,bingyongliantongguanlianjie。jianzuoshuichideshuixiangyingfenchengwangge,yibianqingxihejianxiushibutingshui。

二、消防水箱管道布置

按規范要求,消防水箱應設進水管、出水管、溢流信號管、通氣管等,為了保證水質不被污染并定期排放水中的沉淀物和雜質,消防水箱還應設放空管。對于出水管的管徑,應根據設計流量和流速來確定,即d(m)=(4q/3.14v)^(1/2)(q:m^3/s v:m/s)。對消火栓系統而言,水箱出水管經增壓(指水箱高度不能滿足水力計算要求的)后,可以直接與消火栓管網連接,而對自動噴水滅火系統,必須經濕式報警閥后,才能與噴淋立管相接,而絕不能不經濕式報警閥直接與管網相連,因為報警閥上的水力警鈴是靠水的沖動來報警
的,若不經報警閥,發生火災時,壓力水進不了報警通道,致使壓力開關、水力警鈴不動作,更不會快速發出電信號啟動噴淋泵,從而使管網內的水源得不到充分保證。為避免消防水泵開啟后水經供水管網進入消防水箱,消防水箱的出水管上還須加逆止閥,以阻止水進入消防水箱并保證消防水泵開啟時維持管網壓力。

三、消防水箱加壓措施

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