초록 ▼

A system whereby use is made of a double bottom tank, in fluid communication with a bag made of reinforced elastomeric material to provide segregated ballast space in the cargo space of a ship. The double bottom space and bag are filled with ballast water when the cargo space is empty, thereby makin

A system whereby use is made of a double bottom tank, in fluid communication with a bag made of reinforced elastomeric material to provide segregated ballast space in the cargo space of a ship. The double bottom space and bag are filled with ballast water when the cargo space is empty, thereby making use of the cargo space in which the bag is located to carry ballast water in space previously occupied by cargo, without having any cross-contamination of the ballast water by the cargo residues or gases. The outward and upward movement of the bag is restricted by a rigid guide cage. An open, or partially open, topped rigid container is placed around the guide cage to restrict the “free surface effect”of the ballast water in the unlikely event of failure of the ballast bag. A header tank is provided to keep a positive pressure head on the water in the bag when in the ballast condition. A semi-flexible float assists in guiding the bag during ballasting and de-ballasting operations.

대표청구항 ▼

A segregated ballast system for a double bottomed ship comprising a flexible, impermeable container, located in the cargo space of the ship but not internally communicating therewith and in fluid internal communication with the double bottom space of said ship, the container being surrounded by a ca

A segregated ballast system for a double bottomed ship comprising a flexible, impermeable container, located in the cargo space of the ship but not internally communicating therewith and in fluid internal communication with the double bottom space of said ship, the container being surrounded by a cage-like rigid porous guide and support means; means for passing ballast water out from and into the double bottom space and flexible container as required; air vent means to permit escape from the container of air entrapped therein; and the container and rigid porous guide being circumscribed by and contained within the walls of an emergency container to restrain the free flow of ballast water within this emergency container in event of failure of the flexible container, said cargo space being defined by longitudinal and transverse bulkheads, the walls of said emergency container being separate from any cargo space defining bulkheads.