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在自动消防系统中,喷射时间是实现及时扑灭火灾的一个关键性技术参数,必须准确。 本文根据流量与压力之间的流体力学原理进行了变量之间物理和数学的分析,并作了一些简化处理。建立了存储压力与时间的变量分离型一阶微分方程,进而得出喷射时间的理论公式。最后用试验数据进行修正而得出喷射时间的半经验半理论公式 某单位的灭火系统是按流体力学原理设计的,其中调压器室灭火系统,设计时按半经验半理论公式计算出喷射时间 t=9.58 sec,实测数据 t=8.9 sec,证实理论计算值与实际基本符合。因此,本文为自动消防系统提供了喷射时间的计算公式。
In the automatic fire-fighting system, the injection time is a key technical parameter for extinguishing a fire in time and must be accurate. According to the principle of fluid mechanics between flow and pressure, this paper analyzes the physical and mathematical variables and makes some simplifications. A variable-separation first-order differential equation that stores pressure and time is established, and the theoretical formula of injection time is obtained. Finally, the experimental data obtained by correcting the semi-empirical formula of the ejection time of the theoretical formula A unit of fire extinguishing system is designed according to principles of fluid mechanics, of which the pressure regulator chamber fire extinguishing system design semi-empirical semi-theoretical formula to calculate the injection time t = 9.58 sec, the measured data t = 8.9 sec, confirmed that the theoretical calculated value is basically in line with the actual. Therefore, this paper provides the calculation formula of injection time for automatic fire protection system.