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在进行消防用水系统设计时,根据《建筑设计防火规范》的要求,消防水泵宜采用自灌吸水,以保证一旦发生火灾,消防水泵能迅速启动,出水灭火。一般的作法是使得水泵进水口轴线标高低于或与水箱(或水池)的池底标高相同,这样就能保证满足规范的要求见图1。但在某些特殊情况,例如:消防水池池底的标高低于水泵房的地面标高的情况下,就无法使用前述的方法保证水泵自灌吸水。现介绍一种保证水泵自灌吸水的新方法,见图2。
In the design of firefighting water systems, fire-fighting pumps should adopt self-irrigation and water-absorption in accordance with the requirements of the “Code for Fire Protection of Architectural Design” to ensure that in the event of a fire, the fire-fighting pumps can be started quickly and the water can be extinguished. The general practice is to make the water pump inlet axis elevation lower than or equal to the tank bottom elevation of the tank (or pool), so that it can guarantee to meet the requirements of the specification shown in Figure 1. However, in some special cases, such as the case where the elevation of the bottom of the fire pool bottom is lower than the ground level of the pump room, the aforementioned method cannot be used to ensure that the water pump can pump water. A new method of ensuring water pump self-irrigation is introduced. See Figure 2.