| Abstract |
The invention relates to a semi automatic coke drum deheader device (22) for use on a coke drum, the coke drum comprising an upper opening (7), a flange (6) surrounding the upper opening (7) and at least a first vessel cover (2) releasably attached to the flange (6),the deheader device (22) comprises a frame (34a) attached to the coke drum adjacent the upper opening (7), the frame having a base (34) with an opening (1a) therethrough; a bridge (1) for supporting the first vessel cover (2) and a second vessel cover (4), a central shaft (13) positioned through the opening (1a), the central shaft (13) having a distal end (13a) connected to the bridge (1) and a thrust collar (37) surrounding the shaft (13) below the distal and (13a), thwe thrust collar (37) having a thrust surface (37a); a lift assembly is attached to the frame (34a) below the thrust collar (37) for engaging the thrust surface (37a)and selectively raising and lowering the bridge (1) relative to the flange (6); and a rotational assembly operatively connected to the central shaft (13) for rotating the bridge (1) to selectively align one of the first vessel cover (2) and the second vessel cover (4) above the flange 6. |