1、消防水池(可参见消火栓系统)
2、消防水泵(可参见消火栓系统)
3、稳压系统
(1)稳压泵的选型 许多工程中稳压泵的流量偏大。
(2)稳压泵的位置
有些设计人员在高位水箱处设置稳压泵,就近接入自动喷水灭火系统的立管顶部,此种方式存在的问题是:当喷头受热爆炸后,阀后压力降低,稳压泵启动后,仅能使湿式报警阀后的管网压力升高,故不能开启阀瓣,因此压力开关没有讯号启动喷淋泵。
4、水泵接合器
(1) 水泵接合器的设置
(2) 水泵接合器的设计数量偏少的也较多。
5、减压装置的设置 有些设计人员在设计高层建筑物自动喷水灭火系统未予考虑。
6、湿式报警阀
(1) 湿式报警阀的设置
许多工程在设计报警阀的地点时,考虑不周全。
(2) 供水控制阀
有些工程在设计时未设置供水控制阀。
7、水流指示器
水流指示器前应安装信号阀,与水流指示器间的距离不宜小于
8、末端试验装置
末端试验装置包括试验阀、压力表、排水管,试验管径不小于
9、系统联动试验 末端试验阀打开,压力表读数应不小于0.049MPa,许多工程最不利点放水试验时,压力表读数小于0.049MPa。这是因为设计时未考虑最不利点的动水压力。
10、喷头
宽度大于
11消防水箱
(1)、(2)、(3)、(4)点可参见消火栓系统
(5)在消防水箱出水管处设置的止回阀与水箱底的垂直距离太小(通常不足
12、泄压阀 某些工程在水泵的出水管上未装设泄压阀。
13、固定托座和固定支架
设计人员在自动喷水灭火系统设计的同时计算出荷载,并依据此值设计出配水立管底部的专用承重托座,且同时还应会同建筑结构专业的设计人员验算建筑结构部件能否承受此托座传递过来的荷载
14、套管与所穿管道间隙密实填料的选择 设计人员在设计自动喷水灭火系统时就应把套管填充材料选定下来。选择玻璃纤维布代替石棉作套管间隙填充材料较好。
15、压力开关水力警铃误报警 ,有些误报问题往往是因为设计原因造成的
(1)直接由市政水作稳压 由于市政水压力波动大,而湿式报警阀本质上是一只止回阀,只允许水单方向流动。当市政水处于低压时,湿式报警阀处于关闭状态,那么在市政水压力升高,P
(2)采用稳压泵稳压。 如果稳压泵补水平缓,始终使阀瓣小角度开启向管网补水,即不会发生"误报"。如果补水速率过大,一开始补水,阀瓣就冲至大角度开启,即发生误报。
(3)设置增压泵系统 增压泵增压引起误报的原因与稳压系统相同。
泡沫灭火系统
1、泡沫混合液支干管道控制阀距储罐偏近,且不易操作。
2、混合液管道上未设置泡沫栓
3、计算混合液数量未泡沫消火栓用量和管道容积考虑在内
4、管网最低处未设置泄放装置
5、路最高部位未设置自动排气阀
- 上一篇:消火栓給水系统设计缺陷
- 下一篇:气体灭火系统消防设计缺陷
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