Thermal insulating pipe

The invention relates to the field of hot water thermal insulating pipe structures. The thermal insulating pipe comprises an outer pipe and an inner pipe. The inner pipe is fixed on the center of the outer pipe through a fixing support. A polyurethane insulation coating is formed between the outer pipe and the inner pipe through polyurethane foaming. The outer surface of the inner pipe is provided with a solar heat absorption coating. The inner surface of the outer pipe is provided with an infrared reflection coating. The thermal insulating pipe can satisfy requirements of high-temperature heat conduction and long time heat conduction. 本发明涉及热水保温管结构领域。种保温管，包括外管和内管，所述内管通过固定支架固定在外管中心，所述外管和内管之间通过聚氨酯发泡形成聚氨酯保温层，所述内管外表面设有太阳能吸热涂层，所述外管内表面设有红外反射涂层。本发明能够满足高温通热、长时间通热的情况需要。