| 摘要 |
PROBLEM TO BE SOLVED: To provide a suspended type heating tube vibration-absorbing structure preventing the wear of the heating tube and the crack of the weld zone of a vibration- absorbing lug on the heating tube side. SOLUTION: By using an L-shaped lug 3, a small piece 4 or the like is welded and fixed to a heating tube 2, and the engagement of the small piece 4 or the like and rod-like connecting metal fittings 1 provided with a groove aligns the heating tube 2 in a constitution. By having such a structure as to pinch the small piece 4 with the connecting metal fittings 1, the distance from the location of the action of the force by the vibration of a coil at the time of the atomization of a soot blower to the heating tube 2 can be reduced compared with the distance from the welded surface of the weld zone to the surface of the location contacting the small piece, compared with the conventional structure pinching the L-shaped lug 3 with the connecting metal fittings 1. Moreover, the stress caused to the engaging structure of the heating tube 2 and the small piece 4 is reduced to such an extent as to prevent cracks. In the old boiler furnace, the L-shaped lug 3 that is already installed is diverted, and only installing the small piece 4 provides the function of the vibration-absorbing structure. Thus, it is economically excellent.
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