Sealing device for secondary sealing of outward floating roof tank and outward floating roof tank

Abstract

The invention discloses a sealing device for secondary sealing of an outward floating roof tank and the outward floating roof tank. The sealing device for secondary sealing of the outward floating roof tank comprises a sealing plate (1) and a pressing device (2), wherein the pressing device (2) comprises a circular arc-shaped steel plate (3), a pressing plate (4), a spring (5) and a supporting plate (6), the pressing plate (4) and the sealing plate (1) are stacked, two ends of the spring (5) are connected with the circular arc-shaped steel plate (3) and the supporting plate (6) respectively, and the spring (5) is in an elongation state and can drive the pressing plate (4) to press the sealing plate (1) through the circular arc-shaped steel plate (3). The sealing device for secondary sealing of the outward floating roof tank can realize equipotential connection of a floating tray and the tank wall of the outward floating roof tank, and can keep tight attachment with the tank wall in a long-term operating process, and thereby guaranteeing safe operation of the outward floating roof tank.

Description

technical field [0001] The invention relates to the field of oil storage equipment, in particular to a sealing device for secondary sealing of an external floating roof storage tank, and also to an external floating roof storage tank. Background technique [0002] At present, my country's external floating roof storage tanks generally adopt a combination of primary and secondary sealing. Due to the uneven settlement of the storage tank, the surface wear of the sealing rubber, etc., there is a gap between the primary seal and the tank wall, and oil and gas leak into the space between the primary seal and the secondary seal. In addition, when the floating plate slowly descends, the oil product will adhere to the tank wall. Since the external temperature is usually lower than the oil temperature, the oil product will form an oil film, and the oil and gas on the surface of the oil film will volatilize between the primary and secondary sealing devices. A gas-oil mixture is forme...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that spark discharges are easily generated in the gap between the tank wall and the floating roof, the present invention provides a sealing device for the secondary sealing of the external floating roof storage tank and the external floating roof storage tank, the secondary sealing of the external floating roof storage tank The airtight sealing device can equipotentially connect the floating plate of the external floating roof storage tank with the tank wall, and can keep it tightly attached to the tank wall during long-term operation to ensure the safe operation of the external floating roof storage tank

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