消火栓栓口动压超压时减压方式的选择  

Selection of Pressure Reducing Mode for Excess Dynamic Pressure at Fire Hydrant Outlet

作　　者：李云 马慧俊 LI Yun;MA Hui-jun(Zhejiang Province Institute of Architectural Design and Research,Hangzhou 310006,China)

机构地区：[1]浙江省建筑设计研究院,浙江杭州310006

出　　处：《中国给水排水》2021年第20期47-51,共5页China Water & Wastewater

摘　　要：针对消火栓栓口动压在0.50~0.70 MPa时设计选用减压方式的分歧,分别分析了减压孔板和减压稳压消火栓的技术特点,比较新老标准、图集中减压稳压消火栓的技术参数变化,并且对该类消火栓的生产检测状况及减压性能进行调研。综合对比两类减压方式后,得出结论:目前减压稳压消火栓的产品标准与规范要求不匹配,产品标准中的消火栓类型不能完全符合规范的栓口压力要求;建议在栓口压力为0.50~0.70 MPa时采用减压孔板减压,在栓口压力为0.70 MPa以上时,采用图集中的Ⅲ型减压稳压消火栓减压。When dynamic pressure of a hydrant outlet is between 0.50 MPa and 0.70 MPa,there are differences in the design and selection of pressure reducing methods.Therefore,technical characteristics of pressure reducing orifice plate and pressure reducing and stabilizing fire hydrant were analyzed,variations in technical parameters of pressure reducing and stabilizing fire hydrant in new and old standards and atlases were compared,and production testing status and pressure reducing performance of this type of hydrant were investigated.After comprehensive comparison of the two pressure reducing methods,following conclusions were obtained:the product standard of pressure reducing and stabilizing fire hydrant did not match the specification,and the type of hydrant in the product standard could not fully meet the hydrant outlet pressure requirements in the code;it was suggested that pressure reducing orifice plate should be used when hydrant outlet pressure was 0.50-0.70 MPa,and the typeⅢpressure reducing and stabilizing fire hydrant in the atlases should be used for pressure reduction when the hydrant outlet pressure was above 0.70 MPa.

关 键 词：栓口动压 减压孔板 减压稳压消火栓 

分 类 号：TU998.1[建筑科学—市政工程]