消防给水系统中消火栓栓口静压分区的技术分析与建议
Technical analysis and optimization strategies for static pressure zoning at fire hydrant outlets in fire water supply systems
李魏武 1李传志 1马历程 1白一博1
作者信息
- 1. 中信建筑设计研究总院有限公司,武汉 430014
- 折叠
摘要
对比分析中国和美国消防给水系统的差异,深入研究《消防给水及消火栓系统技术规范》(GB 50974-2014)中关于消火栓栓口静压分区规定的原因.通过案例分析方法,研究不同建筑高度和系统配置下的消防给水系统最低处消火栓栓口的压力数值变化.结果表明,消火栓栓口静压1.0 MPa的限值规定在某些情况下会导致临时高压系统存在超压损坏风险;临时高压消防给水系统的稳压泵设计压力按消防泵零流量时扬程加上0.10 MPa的规定不合理.据此提出改进消火栓系统分区的依据和重新评估稳压泵设计压力的建议.
Abstract
This study compares and analyzes the differences between Chinese and American fire water supply systems,and delves into the underlying reasons for the static pressure zoning regula-tions at fire hydrant outlets in the Technical code for fire water supply and hydrant systems(GB 50974-2014).Using case analysis method,the pressure variations at the lowest fire hydrant out-lets in fire water supply systems under different building heights and system configurations were investigated.Results show that:the 1.0 MPa limit for static pressure at fire hydrant outlets may lead to overpressure damage risks in temporary high-pressure systems under certain circumstances;the regulation that sets the design pressure of pressure stabilizing pumps in temporary high-pres-sure fire water supply systems as the fire pump's zero-flow head plus 0.10 MPa is unreasonable.Based on these findings,improvements to the criteria for fire hydrant system zoning and reevalu-ation of the set values for pressure stabilizing pump design pressure are proposed.
关键词
消火栓系统/消火栓栓口静压/稳压泵设计压力/NFPAKey words
Fire hydrant system/Static pressure at fire hydrant outlet/Pressure stabilizing pump design pressure/NFPA引用本文复制引用
出版年
2024
NETL
NSTL
万方数据