초록 ▼

Closure apparatus for a high pressure vessel includes a closure member having a hemispherically concave interior and a stepped cylindrical exterior portion. The stepped cylindrical exterior portion is adapted to complement the cross-sectional shape of flanged sector blocks so that the sector blocks

Closure apparatus for a high pressure vessel includes a closure member having a hemispherically concave interior and a stepped cylindrical exterior portion. The stepped cylindrical exterior portion is adapted to complement the cross-sectional shape of flanged sector blocks so that the sector blocks are lockingly engaged in a circumferential groove in an access opening of the high pressure vessel when the closure member is installed, thereby eliminating any requirement for a wedge ring support for the blocks. The present closure apparatus may be retrofitted into high pressure vessels already equipped with a much heavier flat plate closure. The present closure apparatus may be of the partial access type, an elliptical manway being provided in the closure member. Access through the manway allows periodic maintenance of the vessel interior without having to remove the heavy closure member.

대표청구항 ▼

Closure apparatus for a high pressure vessel having a cylindrical interior channel wall including a circumferential groove, the closure apparatus comprising: a closure member and a plurality of flanged sector blocks, the closure member having an outer rim adapted to slidably engage the cylindrical i

Closure apparatus for a high pressure vessel having a cylindrical interior channel wall including a circumferential groove, the closure apparatus comprising: a closure member and a plurality of flanged sector blocks, the closure member having an outer rim adapted to slidably engage the cylindrical interior channel wall of the vessel upon insertion into the vessel, a hemispherically concave interior surface, and a stepped cylindrical exterior portion complementing the flanged sector blocks, the plurality of flanged sector blocks each having a flange portion for insertion into the circumferential groove of the cylindrical interior channel wall and for supporting the closure member and a lengthwise portion with an exterior surface for engaging the cylindrical interior channel wall and an interior surface for engaging the stepped cylindrical exterior portion of the closure member, such that the closure member, after insertion and upon lowering into a final position, lockingly engages the flanged sector blocks without any requirement for a locking wedge ring.