Exhaust adapter

Abstract

An exhaust adapter comprises a packing 15 compressed and held between a flange 14 of an exhaust flow path portion 5 and an outer peripheral portion of an exhaust outlet 11, and a sliding guide portion 18 provided on an inner surface of the main body 2 and brought into pressure contact with an outer surface of a closing portion 16 that is an opposing wall of an opening 13 of the exhaust flow path portion 5 are included. The sliding guide portion 18 is formed with a concave arcuate portion 18a inclined in a direction of a side of the exhaust outlet 11 from a distal end side toward a proximal end side, and the exhaust flow path portion 5 is fixed to the main body 2 in a state where the outer surface of the closing portion 16 is formed in a convex arcuate surface 16a and the convex arcuate surface 16a is pushed along the concave arcuate portion 18a of the sliding guide portion 18.

1 . An exhaust adapter connected to a combustion device including a box-shaped device main body forming an outer shell and an exhaust cylinder protruding outward from the device main body, the exhaust adapter comprising:
 a box-shaped main body provided with an exhaust outlet that discharges combustion exhaust gas from the combustion device;   an exhaust flow guide body provided in the main body and connecting the exhaust cylinder to the exhaust outlet;   an exhaust flow path portion constituting a part of the exhaust flow guide body and including an opening that communicates with the exhaust outlet and a flange provided on an outer peripheral edge of the opening;   a packing that is compressed and held between the flange of the exhaust flow path portion and an inner surface of the main body at an outer peripheral portion of the exhaust outlet; and   a sliding guide portion provided on an inner surface of the main body and brought into pressure contact with an outer surface of a closing portion, the outer surface being an opposing wall of the opening in the exhaust flow path portion,   wherein the sliding guide portion is formed with a concave arcuate portion inclined in a direction on a side of the exhaust outlet from a distal end side toward a proximal end side, and   the exhaust flow path portion is fixed to the main body in a state where an outer surface of the closing portion is formed in a convex arcuate surface, and the convex arcuate surface is pushed in along the concave arcuate portion of the sliding guide portion.   
     
     
         2 . The exhaust adapter according to  claim 1 , wherein
 the exhaust flow path portion includes a bulging portion that bulges outward, and the bulging portion constitutes the closing portion.   
     
     
         3 . The exhaust adapter according to  claim 1 , wherein
 the exhaust flow path portion is fixed to the main body by screw fixing, and   a direction of the screw fixing is set to a direction intersecting a compression direction of the packing.   
     
     
         4 . The exhaust adapter according to  claim 2 , wherein
 the exhaust flow path portion is fixed to the main body by screw fixing, and   a direction of the screw fixing is set to a direction intersecting a compression direction of the packing.