针对地铁车站消防系统启泵不动作、时间过长等问题，研究其市政直接加压供水的消防给水控制系统自 动启泵的优化方法。首先在地铁车站进行消防系统自动启泵的现场试验，然后针对现场测试数据展开分析，掌 握消防系统压力与流量的变化特点，最后创建基于站点市政水压阈值条件下确定压力开关、流量开关、稳压泵组 取值的新方法。研究结果表明：由于压力开关的设定值受市政水压影响，车站市政直抽消防系统应采用高压稳压； 不同工况下压力开关、流量开关具有互补性，因此流量开关与压力开关均设定为自动启泵，提高自动启泵可靠性； 压力开关、流量开关与稳压泵组之间的动作值逻辑关系应根据泵房不同的设置方案进行相应调整，避免消防管网 渗漏引起压力开关、流量开关误动作启泵的风险，解决自动启泵时间过长或过快的问题。研究成果以期为地铁新 线消火栓给水系统及消防泵房的设计提供参考，保证车站消防给水系统顺利实现自动启泵，有效提升地铁消防给 水系统的效率与安全。

The study addressed issues related to the non-action and delayed response times of subway station fire protection systems, focusing on optimizing the automatic pump start method for fire water supply control systems utilizing municipal direct pressurized water supply. Initially, a field test was conducted on the automatic pump start system at a subway station, followed by a detailed analysis of the test data to understand pressure and flow rate change dynamics within the fire protection system. Based on this analysis, a novel approach was developed to determine optimal settings for the pressure switch, flow switch, and stabilizer pump unit, calibrated explicitly to the municipal water pressure thresholds at each station. Findings highlighted the necessity of employing high-pressure stabilization due to the influence of municipal water pressure on the pressure switch. Additionally, it was noted that the interplay between pressure and flow switches is crucial under varying operational conditions, necessitating their complementary roles in enabling automatic pump start functionality to enhance reliability. Adjustments were recommended for the logical relationship between the flow switch activation threshold and the stabilizer pump unit settings in different pump room configurations. This adjustment aimed to prevent inadvertent pump start-ups triggered by fire pipe network leaks, thereby addressing concerns related to overly prolonged or rapid pump activation. These research outcomes are essential guidelines for designing new subway lines’ fire hydrant water supply systems and fire pump rooms. Their application ensures smooth automatic initiation of station fire water supply systems, effectively enhancing efficiency and safety across subway network fire protection systems.

U231

北京市自然科学基金(L231018)