| 摘要 |
The present invention is a secondary sealing device for use in a storage vessel having a floating roof and a primary sealing structure that includes a set of steel shoes, each of which is disposed about the perimeter of the floating roof and is mechanically coupled at one of its ends and adapted so that it can contact the inner sidewall of the storage vessel, a set of pushers, each of which is mechanically coupled to the floating roof and to one of the steel shoes and is adapted to apply a constant pressure against the steel shoe so that the side of the steel shoe contacting the inner sidewall of the storage vessel presses against the inner sidewall of the storage vessel. A fabric sealing material which is disposed about the perimeter of the floating roof and secured thereto on one of its sides in a gas-tight manner and secured to the steel shoes contacting the inner sidewall of the cylindrical tank of each hanger in a gas-tight manner and a secondary sealing device has been described. The secondary sealing device includes a support member of an inelastic material having a substantially rectangular cross-section with a support member being mechanically coupled to the steel shoes of the primary sealing structure contacting the inner sidewall of the storage vessel and an elongated inner core member of elastic material having a rectangular cross-section with the core member being secured to the support member and adapted so that the fabric sealing material may be looped over the core member and secured on both sides of the loop to the supporting member.
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