Heating furnace having double insulating wall structure
AssigneeToyota Jidosha Kabushiki Kaisha
InventorOsamu YAMASHITA
Life of this patent
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Abstract
A double insulating wall structure heating furnace capable of preventing its inner pipe whose strength has decreased due to high-temperature heating from being damaged. A double insulating wall structure heating furnace 1 includes an outer pipe 2 and an inner pipe 3 disposed inside the outer pipe 2, in which a sealed space 8 formed between the outer and inner pipes 2 and 3 is depressurized and a heating space 13 formed inside the inner pipe 3 is heated, and in which a tubular reinforcing member 6 is disposed so as to cover an outer circumference of the inner pipe 3, the tubular reinforcing member being formed of a material having a higher heat resistance and a higher strength than those of the material of the inner pipe 3.
Claims4
A double insulating wall structure heating furnace comprising an outer pipe and an inner pipe disposed inside the outer pipe, in which a sealed space formed between the outer and inner pipes is depressurized and a space formed inside the inner pipe is heated to a heating temperature, and
- wherein a tubular reinforcing member is disposed so as to cover an outer circumference of the inner pipe, the tubular reinforcing member being formed of a material that has a higher strength than that of a material of the inner pipe at the heating temperature.
Dependencies are inferred from the claim text.