Flexible seal for a vapor cavity

Abstract

Abstract A flexible seal is disclosed for a vapor cavity between a tank shell and a floating roof. The seal has a quadrilateral type linkage on the floating roof which linkage has a fixed link and movable links. A flexible wear cover member is on the floating roof. A contact member is mounted on one of the movable links, adjacent the wear cover member, the contact member having a mounting plate, a cover member and a flexible core member between the mounting plate and the cover member. A counterweight means is on one of the movable links and is operable to force the contact member into contact with the wear cover member so that the wear cover member seals the vapor cavity. Further, a flexible seal is disclosed having a support member secured at one end to the floating roof, and a tubular-sealing member having a wear cover member provided with flanges at each end and a flexible core member. The sealing member has one flange secured to the free end of the support member and the other flange secured to the other end of the floating roof. The sealing member is operable to seal the vapor cavity. In addition, a seal is disclosed having a mounting member pivoted on the floating roof and a sealing member carried by the free end of the mounting member for sealing the vapor cavity. The sealing member has a rigid core member, a flexible core member surrounding the rigid core member, a wear cover member disposed about the flexible core member, and a support member extending through the sealing member and secured to the rigid core member and to the wear cover member. Also, a rectangular self-energizing seal is disclosed having a sealing member provided with a rigid inner core member; a flexible inner core member disposed about the rigid inner core member; a rigid outer core member disposed about the flexible inner core member; rigid end section members covering the rigid outer core member, the flexible inner core member, and the rigid inner core member; a flexible outer core member disposed about the rigid outer core member, and the rigid end section members; a wear cover member covering the flexible outer member and the rigid end section members; a support rod extending through the sealing member and secured to the rigid end section members, a pair of generally diagonally disposed scuff pads projecting from the wear cover member, and generally diagonally disposed sealing surfaces on the outer flexible layer. A mounting rod is pivoted on the floating roof and pivotably connected to one of the scuff pads. A counterweight rod is pivotable on the other scuff pad, and a counterweight means is carried by the counterweight rod to force the sealing surfaces into sealing engagement with the tank shell and the floating roof. Again, a flexible substantially square seal is disclosed having a mounting member pivoted on the floating roof and depending into the vapor cavity, a sealing member connected to the mounting member and having a flexible inner core member; a rigid inner core member disposed about the flexible inner core member; rigid end section members covering the rigid inner core member and the flexible inner core member; a flexible outer core member adjacent the rigid end section members and the rigid inner core member; and a scuff pad surrounding the rigid end sEction members and the flexible outer core member; a support rod extending through the sealing member and connected to the rigid end section members and to the mounting member. The scuff pad and the flexible outer core member are deformable to seal the vapor cavity. Further, a rotary circular seal is disclosed having a mounting member pivoted at one end of the floating roof, an annular member carried by the other end of the mounting member and rotatable in the mounting member, and a sealing member on the annular member and having a rigid inner core member disposed about the annular member; a flexible outer core member surrounding the rigid inner core member; and a scuff pad about the flexible outer core member.

Inventors

• 👤 Martin A Nishkian
• 👤 Wayne E Nuttall

Bibliographic Details