Shrapnel type foam plastic primary sealing device for floating roof storage tank and installation method thereof

Abstract

The invention discloses an elastic piece type foamed plastic primary sealing device for a floating roof storage tank. The elastic piece type foamed plastic primary sealing device comprises an outer-layer rubber belt. One side of the outer-layer rubber belt and a floating disc edge plate are in contact and fixed and pressed through a fixing plate. An inner-layer rubber belt is arranged inside the outer-layer rubber belt. A sponge is wrapped inside the inner-layer rubber belt. An elastic steel piece providing the elastic force towards the tank wall is arranged on the inner side of the sponge. The tail end of the outer-layer rubber belt, the tail end of the inner-layer rubber belt and the tail end of the elastic steel piece are all fixed to the floating disc edge plate. According to the elastic piece type foamed plastic primary sealing device for the floating roof storage tank, the problem that the elasticity of an existing foamed plastic sealing structure is insufficient is solved; the requirement for larger deformation of the tank wall of the storage tank can be met; and in addition, the oil gas space inside a floating disc edge clearance is eliminated through the primary sealing device, and the occurrence of sealing ring fire accidents can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of oil and gas storage and transportation, and in particular relates to the edge sealing technology of a floating plate of a crude oil storage tank. Background technique [0002] The edge seal of the floating plate is one of the most important devices for controlling the volatilization of oil and gas in large crude oil storage tanks. After using the seal, the volatilization loss of oil can be greatly reduced. The edge seal of the floating plate is mainly composed of two parts: the primary seal and the secondary seal. The primary seal is installed in the annular space between the floating plate and the tank wall, and is usually in direct contact with the oil. In order to further reduce the evaporation loss of oil products, a set of sealing device is added on top of the original primary seal, that is, the secondary seal. [0003] Primary seals are mainly divided into three types according to different structu...

AI Technical Summary

Problems solved by technology

Although this structure makes up for the shortcomings of the large oil and gas space inside the liquid-immersed foam plastic sealing structure, it still cannot seal the excessively large edge gap well for storage tanks with serious deformation of the tank wall

[0007] Invention patent CN 104355004 A "A sealing device between the floating plate and the tank wall of an outer floating roof tank and its installation method" discloses a method for optimizing the foam sealing device, which is similar to the former, except that the structure uses a new hybrid Type rubber belt, no T-shaped rubber belt

[0009] None of the above technologies can well meet the requirements of the edge seal of the floating plate, there are sealing gaps, or there is oil and gas space in the edge gap, and there are lightning discharge points in the sealing structure, etc.

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