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自動噴(pen)水(shui)滅火系統的(de)工作原理
預(yu)作用系(xi)統(tong),平常預(yu)作用閥后管(guan)網(wang)充以高(gao)壓壓縮氛(fen)圍(wei)或(huo)氮氣(也(ye)可以是空管(guan)),火(huo)警(jing)(jing)(jing)時,由火(huo)警(jing)(jing)(jing)探(tan)測(ce)(ce)系(xi)統(tong)自動(dong)開(kai)啟預(yu)作用閥,使管(guan)道充水(shui)(shui)(shui)呈(cheng)臨時濕式系(xi)統(tong)。因而,要求火(huo)警(jing)(jing)(jing)探(tan)測(ce)(ce)器的(de)行(xing)(xing)動(dong)先(xian)于消(xiao)防(fang)噴(pen)頭的(de)行(xing)(xing)動(dong),而且應確保(bao)(bao)當閉式消(xiao)防(fang)噴(pen)頭受熱開(kai)放(fang)時管(guan)道內已充滿了壓力水(shui)(shui)(shui)。從火(huo)警(jing)(jing)(jing)探(tan)測(ce)(ce)器行(xing)(xing)動(dong)并開(kai)啟預(yu)作用閥開(kai)端充水(shui)(shui)(shui),到水(shui)(shui)(shui)流(liu)流(liu)到消(xiao)防(fang)噴(pen)頭的(de)工夫,應不(bu)凌駕3min,水(shui)(shui)(shui)流(liu)在配水(shui)(shui)(shui)支管(guan)中的(de)流(liu)速不(bu)該大于2m/s,以此來確定預(yu)作用系(xi)統(tong)管(guan)網(wang)較長的(de)保(bao)(bao)護間隔。
濕(shi)(shi)式自(zi)動噴(pen)(pen)水(shui)滅(mie)火(huo)系統(tong)(tong),是世(shi)界上(shang)使用(yong)(yong)工夫較長,應用(yong)(yong)遍及(ji),控火(huo)、滅(mie)火(huo)中使用(yong)(yong)頻率較高的一種(zhong)閉式自(zi)動噴(pen)(pen)水(shui)滅(mie)火(huo)系統(tong)(tong),現在世(shi)界上(shang)已安裝的自(zi)動噴(pen)(pen)水(shui)滅(mie)火(huo)系統(tong)(tong)中有70%以上(shang)采用(yong)(yong)了濕(shi)(shi)式自(zi)動噴(pen)(pen)水(shui)滅(mie)火(huo)系統(tong)(tong)。
①系統(tong)的組成(cheng)和(he)事情原(yuan)理
濕(shi)式自動(dong)噴(pen)(pen)水(shui)(shui)(shui)(shui)滅(mie)火(huo)(huo)系同一樣平常(chang)包括:閉式消防噴(pen)(pen)頭(tou)、管(guan)(guan)(guan)道系統、濕(shi)式報(bao)(bao)(bao)警(jing)閥和供(gong)水(shui)(shui)(shui)(shui)設置裝備(bei)擺設。濕(shi)式報(bao)(bao)(bao)警(jing)閥的上(shang)下管(guan)(guan)(guan)網內均充以(yi)壓(ya)力(li)水(shui)(shui)(shui)(shui)。當火(huo)(huo)警(jing)產生時,火(huo)(huo)源四周環境溫度上(shang)升(sheng),導致火(huo)(huo)源上(shang)方的消防噴(pen)(pen)頭(tou)開(kai)啟(qi)、出水(shui)(shui)(shui)(shui)、管(guan)(guan)(guan)網壓(ya)力(li)降(jiang)落,報(bao)(bao)(bao)警(jing)閥后壓(ya)力(li)降(jiang)落致使閥板開(kai)啟(qi),接通管(guan)(guan)(guan)網和水(shui)(shui)(shui)(shui)源,供(gong)水(shui)(shui)(shui)(shui)滅(mie)火(huo)(huo)。與此同時,部分(fen)水(shui)(shui)(shui)(shui)由閥座上(shang)的凹形槽經(jing)報(bao)(bao)(bao)警(jing)閥的信號(hao)(hao)管(guan)(guan)(guan),動(dong)員水(shui)(shui)(shui)(shui)力(li)警(jing)鈴收(shou)(shou)(shou)回報(bao)(bao)(bao)警(jing)信號(hao)(hao)。如(ru)(ru)果(guo)(guo)管(guan)(guan)(guan)網中(zhong)設有(you)水(shui)(shui)(shui)(shui)流指示器(qi),水(shui)(shui)(shui)(shui)流指示器(qi)感(gan)到到水(shui)(shui)(shui)(shui)流流動(dong),也可收(shou)(shou)(shou)回電信號(hao)(hao)。如(ru)(ru)果(guo)(guo)管(guan)(guan)(guan)網中(zhong)設有(you)壓(ya)力(li)開(kai)關(guan),當管(guan)(guan)(guan)網水(shui)(shui)(shui)(shui)壓(ya)降(jiang)落到一定值時,也可收(shou)(shou)(shou)回電信號(hao)(hao),啟(qi)動(dong)水(shui)(shui)(shui)(shui)泵供(gong)水(shui)(shui)(shui)(shui)。
②系統的適用范疇
濕式自動噴水滅火系統在環境溫度不低(di)于4℃且不高于70℃的(de)修建物和場合(不能用水撲(pu)救的(de)修建物和場合除外(wai))都可(ke)采(cai)用。
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