초록 ▼

A multiple shell pressure vessel utilizes a number of spaced apart, concentrically disposed pressure vessel shells within and spaced apart from an outer pressure vessel shell, the spaces between each shell being filled with a low melting point, high boiling point material selected from the group, le

A multiple shell pressure vessel utilizes a number of spaced apart, concentrically disposed pressure vessel shells within and spaced apart from an outer pressure vessel shell, the spaces between each shell being filled with a low melting point, high boiling point material selected from the group, lead, tin, antimony, bismuth, or sodium and potassium, and mixtures thereof and subjected to a pressure whereby the innermost pressure vessel shell wall is maintained in compression while the main vessel is pressurized. Chemical compositions or compounds which contain boron or cadmium may also be added to the filler material. The vessel may include devices for keeping the pressure in the space between the innermost pressure vessel shell and the next innermost shell at a fixed predetermined multiple of the pressure within the innermost pressure vessel shell. A method of constructing the multiple shell pressure vessel includes a sequence of steps for filling the spaces between shells with the low melting point, high boiling point materials in such a way that the inner shell is compressed and the outer shells are in tension.

대표청구항 ▼

A method of fabricating a pressure vessel comprising the steps of attaching a first inner presure vessel having means defining inlet and outlet openings to a top flange, placing a second inner pressure vessel, having means defining inlet and outlet opening, concentric with and spaced about said firs

A method of fabricating a pressure vessel comprising the steps of attaching a first inner presure vessel having means defining inlet and outlet openings to a top flange, placing a second inner pressure vessel, having means defining inlet and outlet opening, concentric with and spaced about said first inner pressure vessel and attaching said second inner pressure vessel to said top flange, placing an outer pressure vessel, having inlet and outlet openings, concentric with and spaced apart about said second inner pressure vessel and attaching said outer pressure vessel to said top flange, attaching a generally cylindrical inner inlet conduit and a generally cylindrical inner outlet conduit respectively to said inlet and outlet openings in said first inner pressure vessel, attaching a generally cylindrical outer inlet conduit and a generally cylindrical outer outlet conduit respectively to said inlet and outlet opening in said second inner pressure vessel, heating the assembled pressure vessel to a temperature above the melting point of a material selected from the group, lead, tin, antimony, bismuth, potassium, sodium, boron and mixtures thereof, filling the space between said first inner pressure vessel and said second inner pressure vessel with material selected from said group, filling the space between said second inner pressure vessel and said outer pressure vessel with material selected from said group, and pressurizing said material filling said spaces between said pressure vessels to a predetermined pressure, said step comprising pressurizing said spaces to a pressure whereby the wall of said first inner pressure vessel is maintained in compression during steady state operation of said pressure vessel.