JPH0449787U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a multi-tubular once-through boiler showing an embodiment of this invention, Fig. 2 is a cross-sectional view showing the arrangement of heat transfer tubes, and Fig. 3 is a mounting portion of heat transfer promoting fins. 4 is a perspective view showing the protrusion shape of the heat transfer promoting fin, FIG. 5 is a perspective view showing the attachment part of the heat transfer tube and the heat transfer promoting fin, and FIG. 6 is a perspective view showing the heat transfer promoting fin.
A perspective view showing the protrusion shape of FIG. 4 and another protrusion shape,
Fig. 7 is an enlarged sectional view showing the details of heat transfer promoting fins attached to double-row heat transfer tubes, Fig. 8 is a perspective view showing the shape of the conventional heat transfer promoting fins, and Fig. 9 is a conventional It is an enlarged cross section showing the details of the attachment part of the heat transfer promoting fin. 1...Heat transfer tube, 10...Heat transfer promoting fin.

Claims (1)

[Scope of utility model registration request] A heat exchanger tube 3 that heats a fluid flowing inside by a heating fluid flowing on the outer surface, and an adjacent set of heat exchanger tubes 3 are installed so as to face each other in a valley on the outer surface.
A heat transfer accelerating fin for a boiler, characterized in that the heat transfer accelerating fin 10 is combined with a substantially V-shaped heat transfer accelerating fin 10, and a required number of chevron-shaped protrusions are formed on the water tube side surface of the heat transfer accelerating fin 10.