Normal-pressure primary heat exchange unit of gas condensing boiler and heat supply system

The utility model relates to a gas condensing boiler normal pressure primary heat exchange unit and a heat supply system, the gas condensing boiler normal pressure primary heat exchange unit comprises an expansion water tank, a circulating water pump and a plate heat exchanger, and also comprises a water tank base and a lower part support, the expansion water tank is fixedly arranged on the water tank base; the water tank base and the lower support are connected through an inserting structure, and the plate heat exchanger is fixed on the lower support. According to the normal-pressure primary heat exchange unit of the gas condensing boiler, the water tank base and the lower support are connected in an inserted mode, and the normal-pressure primary heat exchange unit has the advantage of being convenient to assemble. 本实用新型涉及一种燃气冷凝锅炉常压一次换热机组和供热系统，燃气冷凝锅炉常压一次换热机组包括膨胀水箱、循环水泵和板式换热器，还包括水箱底座和下部分支架，所述膨胀水箱固定安装在所述水箱底座上，所述水箱底座和所述下部分支架通过插接结构连接，所述板式换热器固定在所述下部分支架上。本实用新型的燃气冷凝锅炉常压一次换热机组，所设置的水箱底座和下部分支架之间通过插接连接，具有组装方便的优点。