Assembled floating cover for a storage tank

Abstract

A built-up floating disc for oil reservoir concludes an inner floating disc and an outer floating disc. The inner and outer floating discs both have a radiant skeleton structure composed of bolt-joined components with I-shaped profile made from steel plate or aluminum plate. There are 6 radial beams connected with a central plate and annular beams. Peripheral beams are used to connect between the outer annular beam and the inner annular beams. Coverplate fixed beams are mounted on the radial beams, auxiliary beams are used to connect between coverplate fixing beams. Plastic floaters presenting equilateral friangle or parallelogram in shape are laid over the space within the skeleton. Thick floaters are secured on the outer annular beam and the inner annular beam. Coverplates are laid on the coverplate fixed beams and are clamped by press bars. A tongue shaped sealing rubber band and a capsule-like sealing rubber band constitute a double layer structure. Using the floating disc can prevent reserved oil from contamination and degradation. And the floating disc is lighter, it can reduce the consumption of metallic material and eliminate the phenomena of sinking disc and blocking disc.

1 . A built-up floating disc for oil reservoir, characterized in that: it is a built-up floating disc which is composed of an outer floating disc ( 2 ), which is connected with a central plate ( 10 ) by  6  radial beams ( 11 ), coverplate fixed beams ( 13 ) are mounted on the radial beams ( 11 ), and many auxiliary beams ( 17 ) are used to connect between coverplate fixed beams ( 13 ), the floating disc is composed of a number of components with I-shaped profile, which are made from steel plate and joined into a radiant skeleton structure with bolts, the plastic floaters ( 9 ) presenting equilateral triangle or parallelogram in shape are laid over all the space within the skeleton, and are secured on the coverplate fixed beams ( 13 ) of the radial beams ( 11 ) and on the peripheral beams ( 24 ), while thick floaters ( 18 ) are secured on the outer annular beams ( 23 ) and the inner annular beams ( 12 ), the central plate ( 10 ) of the outer floating disc ( 2 ) is connected with radial beams ( 11 ) and the outer annular beam ( 23 ), the inner annular beam ( 12 ) is connected with coverplate fixed beams ( 13 ), the floater fixed beams ( 14 ) are connected with coverplate fixed beams ( 13 ) and radial beams ( 11 ), the floaters ( 9 ) are laid over all the space within the skeleton, the cover plates ( 15 ) are laid on the coverplate fixed beams ( 13 ) and are clamped by press bars ( 16 ), the outer floating disc ( 2 ) is provided with rotation preventing steel wires ( 29 ).  
   
   
       2 . The built-up floating disc according to  claim 1 , characterized in that a tongue-shaped sealing rubber band ( 21 ) and a capsule-like sealing rubber band ( 25 ) constitute a double layer structure, the coverplates ( 15 ) are also of a double layer structure, one layer of which is metallic plate and the other layer is glass reinforced plastic plate.  
   
   
       3 . The built-up floating is according to  claim 1 , characterized in that the rotation preventing steel wires ( 29 ) have its upper ends mounted to the supporting frame ( 30 ) and their lower ends connected with the bottom of reservoir.