在建筑物热水供暖系统设计中，当楼层超过４层时宜采用单管系统。单管系统有单管顺流式和单管跨越式。在单管跨越式系统中，跨越管的作用如何，设置时应注意什么，下面笔者从理论上加以分析。以一幢６层建筑物供暖系统中某一立管（见图１）为例。当关闭散热器１上的跨越管... In the design of a building’s hot water heating system, a single-pipe system should be used when the floor exceeds 4 floors. Single-tube systems have a single-flow and a single-tube span. In the single-tube leapfrog system, what is the role of the spanning pipe? What should be paid attention to when setting it up? The author will analyze it theoretically. Take a riser in a 6-floor building heating system (see Figure 1) as an example. When closing the radiator on the radiator 1 ...