Seal for cover on wastewater treatment tank
AssigneeOvivo Inc.
InventorsArtak Daviti Mirzoyan, Haydon Christiansen, Eric Hunter
Life of this patent
Estimating the term…
Abstract
A sealing system for a covered tank, particularly a fixed gas-sealing tank in a wastewater treatment system, includes a thrust ring positioned just inside the tank rim, secured to a series of radial beams for the cover. Preferably supported on corbels anchored to the interior tank wall, the thrust ring has an outwardly extending generally horizontal flange that overlies the edge of the tank rim. To this flange and to the top of the tank rim is secured a flexible membrane seal, around the periphery of the tank. The membrane seal is easily installed, reliable as a seal, and can be efficiently replaced when needed.
Claims14
A rim seal connected between a cover and a concrete tank in a sewage treatment facility, comprising:
- a concrete tank rim at periphery of the tank, and a tank cover over an interior of the tank, the tank cover being supported on the tank rim,
- a series of radial beams converging and extending angularly upwardly toward a top center of the tank cover, and supporting the tank cover, the radial beams having lower, outer ends terminating near the tank rim,
- a structural thrust ring around the periphery of the concrete tank, positioned adjacent to the tank rim and connected to the tank rim, the thrust ring being connected to the outer ends of the radial beams and being positioned to withstand outward forces from the radial beams, and
- a flexible membrane mechanically connected in sealed relationship to both the tank cover and the tank rim, thus providing a gas seal between the tank cover and the tank rim while allowing for thermal expansion and contraction.
Dependencies are inferred from the claim text.