高层建筑前室机械加压送风系统旁通泄压阀超压控制措施分析

Analysis of Overpressure Control Measures for Bypass Relief Valve of Mechanical Pressurized Air Supply System in Front Room of High-Rise Building

分析了前室疏散门的启闭状态,运用管网特性曲线,通过实际案例对着火层及其相邻上下层前室的疏散门的四种开启方式的泄压情况进行了分析,得出采用旁通泄压阀控制机械加压送风正压值的方式难以满足前室的压差要求,并给出建议做法。

This paper analyzes the opening and closing state of the evacuation door in the front room.Through actual cases,it analyzes the pressure relief of the four opening modes of the evacuation door in the front rooms located in the fire layer and its adjacent upper and lower layers,by using the pipe network characteristic curve It is concluded that the positive pressure value of the mechanical pressurized air supply controlled by the bypass pressure relief valve is difficult to meet the pressure difference requirements of the front room,and some suggestions are given.