Fluid storage tank including a flexible bladder supported on a collapsible rigid frame

A fluid storage tank comprising:

• a base structure arranged to be supported on a supporting foundation at a bottom of the tank;
• a plurality of upright columns arranged to be coupled to the base structure and to extend upwardly from the base structure at circumferentially spaced apart positions about a perimeter of the tank in a working position of the columns, the upright columns being collapsible from the working position to a transport position in which the columns are arranged to be bundled alongside one another in the transport position;
• a flexible bladder arranged to be coupled to the upright columns, the flexible bladder defining (i) a bottom boundary separate from the base structure and (ii) an upright perimeter boundary of the tank suitable for containing a fluid within the tank;
• wherein the base structure is arranged to extend below the flexible bladder under tension between diametrically opposing ones of the upright columns;
• wherein at least some of the columns includes rigging mounts formed thereon so as to be arranged to secure the columns to a crane lift cable;
• and
• a lifting harness comprising (i) a central lifting attachment for connection to the crane lift cable and (ii) a plurality of intermediate cables for connection between the central lifting attachment and the riggings mounts of the columns respectively.

A fluid storage tank comprising:

• a base structure arranged to be supported on a supporting foundation at a bottom of the tank;
• a plurality of upright columns arranged to be coupled to the base structure and to extend upwardly from the base structure at circumferentially spaced apart positions about a perimeter of the tank in a working position of the columns, the upright columns being collapsible from the working position to a transport position in which the columns are arranged to be bundled alongside one another in the transport position;
• a flexible bladder arranged to be coupled to the upright columns, the flexible bladder defining (i) a bottom boundary separate from the base structure and (ii) an upright perimeter boundary of the tank suitable for containing a fluid within the tank;
• wherein the base structure is arranged to extend below the flexible bladder under tension between diametrically opposing ones of the upright columns;
• wherein the bladder further defines a top boundary, wherein a hollow interior of the bladder is fully enclosed by the bottom boundary, the upright perimeter boundary and the top boundary of the bladder, the storage tank further comprising a plurality of upper supports connected under tension between the upright columns to span over the top boundary of the flexible bladder in the working position above the bladder;
• and
• wherein the top boundary of the flexible bladder is connected to and suspended from the upper supports and wherein the upper supports are flexible and remain coupled to the columns so as to be collapsible together with the columns between the working position and the transport position.

A fluid storage tank comprising:

• a base structure arranged to be supported on a supporting foundation at a bottom of the tank;
• a plurality of upright columns arranged to be coupled to the base structure and to extend upwardly from the base structure at circumferentially spaced apart positions about a perimeter of the tank in a working position of the columns, the upright columns being collapsible from the working position to a transport position in which the columns are arranged to be bundled alongside one another in the transport position;
• a flexible bladder arranged to be coupled to the upright columns, the flexible bladder defining (i) a bottom boundary separate from the base structure and (ii) an upright perimeter boundary of the tank suitable for containing a fluid within the tank;
• and
• a plurality of guy wires releasably connected between the columns and the base structure at a location spaced outwardly from the bladder in the working position;
• wherein the base structure is arranged to extend below the flexible bladder under tension between diametrically opposing ones of the upright columns;
• and
• wherein the bladder further defines a top boundary, wherein a hollow interior of the bladder is fully enclosed by the bottom boundary, the upright perimeter boundary and the top boundary of the bladder, the storage tank further comprising a plurality of upper supports connected under tension between the upright columns to span over the top boundary of the flexible bladder in the working position above the bladder.