CN-224211670-U - Sealing system for tank steel dome gas jacking

CN224211670UCN 224211670 UCN224211670 UCN 224211670UCN-224211670-U

Abstract

The utility model provides a sealing system for lifting steel dome gas of a storage tank, which comprises a hard seal and a soft seal, wherein the hard seal is formed by overlapping a plurality of hard sealing plates end to end and surrounds the steel dome of the LNG full-capacity tank, the overlapping width between the hard sealing plates is 100mm, four fixing holes which are distributed in a linear mode are formed in the upper edge of the hard sealing plate, a wedge is clamped in a cavity in the center of a portal plate and penetrates through the cavity and is clamped, and the wedge and the portal plate are synchronously fixed by spot welding.

Inventors

FAN ZIHANG
CHEN HAI
CHEN BAIMING
CHEN SIDONG
HOU SHENGQI
YANG CHENGXIN
WANG PANPAN
WANG JIAMIN
MA BIN
MA WENJUN
WANG YANG
ZHOU JINSHUN
DONG YIZHONG
LIU DONGDONG
YAN HAIBIN
Luo Xujie
TANG CAILIN

Assignees

浙江浙能六横液化天然气有限公司

Dates

Publication Date: 20260508
Application Date: 20250623

Claims (6)

1. The sealing system for lifting the steel dome of the storage tank comprises a hard seal and a soft seal, and is characterized in that the hard seal is formed by overlapping a plurality of hard sealing plates (1) end to end, the hard sealing plates are surrounded around the steel dome of the LNG full-capacity tank, the overlapping width between the hard sealing plates (1) is 100mm, a closure plate (3) is welded on the lower surface of the sealing hard plate of the steel dome of the LNG full-capacity tank, four fixing holes which are distributed in a linear mode are formed in the upper edge of the hard sealing plate (1), a wedge (4) is clamped in a cavity in the center of the closure plate (3), the wedge (4) penetrates through the cavity and is clamped, and the wedge (4) and the closure plate (3) are synchronously fixed by spot welding so as to fix the hard seal on the lower surface of the edge of the steel dome of the LNG full-capacity tank; The soft seal is formed by overlapping soft seal soft plates (2), the soft seal soft plates (2) are overlapped at the lower part of the hard sealing plate (1), the overlapping width between the soft seal soft plates (2) and the hard sealing plate (1) is 160mm, the overlapping width between the soft seal soft plates (2) is 150mm, and the residual width of the soft seal soft plates (2) after overlapping the hard sealing plate (1) is 200mm.
2. A seal system for tank steel dome gas lift as set forth in claim 1 wherein said fixing holes have a size of 12 x 60mm, a spacing of 414mm between adjacent centers of said fixing holes, a distance from said fixing holes on both sides to a front and rear edge of the hard seal plate (1) is 100mm, and an upper edge of said fixing holes is 60mm from an upper edge of the hard seal plate (1).
3. A seal system for tank steel dome air jacking as claimed in claim 1, wherein said hard seal plate (1) is a zinc-plated sheet metal of 1442mm by 700mm and 1mm in thickness.
4. A seal system for tank steel dome air lifting as defined in claim 1, wherein the soft seal plate (2) is 2834mm×360mm glass fiber cloth, and the thickness is 1mm.
5. A sealing system for tank steel dome air lifting as set forth in claim 1, wherein the joint between the hard sealing plates (1) is glued with a first sealing tape for sealing the gap, and the joint between the soft sealing soft plates is glued with a second sealing tape for sealing the gap.
6. A seal system for tank steel dome air lifting as defined in claim 5, wherein thick aluminum foil tape is glued at the lap joint between the hard sealing plate (1) and the soft sealing plate.

Description

Sealing system for tank steel dome gas jacking Technical Field The utility model belongs to the technical field of dome gas jacking and sealing, and particularly relates to a sealing system for a steel dome gas jacking of a storage tank. Background The traditional sealing process has the problems of high mounting and dismounting difficulty and unsatisfactory sealing effect, and the reinforced concrete outer tank top needs to be poured by taking a steel dome as a bottom die in the construction process of the large-scale low-temperature storage tank. Because the steel dome of the large-sized low-temperature storage tank is overweight, the steel dome is lifted to the bearing ring by utilizing the air pressure difference between the inside and the outside of the tank and fixed by adopting a welding method, and then the tank top of the reinforced concrete outer tank is poured. In jacking, the inner and outer air pressure difference is required to be ensured between the outer edge of the steel dome and the concrete inner wall of the outer tank, so that a dome air jacking sealing system with a novel structure is hoped to be designed, and the problem is solved. Disclosure of utility model Aiming at the defects existing in the prior art, the utility model aims to provide a sealing system for lifting the steel dome gas of a storage tank, which solves the problems in the prior art. The sealing system for the lifting of the tank steel dome comprises a hard seal and a soft seal, wherein the hard seal is formed by overlapping a plurality of hard sealing plates end to end and surrounds the LNG full-capacity tank steel dome, the overlapping width between the hard sealing plates is 100mm, a closure plate is welded on the lower surface of the sealing hard plate of the LNG full-capacity tank steel dome, four fixing holes which are distributed in a linear mode are formed in the upper edge of the hard sealing plate, a wedge is clamped in a cavity in the center of the closure plate and penetrates through the cavity to be clamped, and the wedge and the closure plate are synchronously fixed by spot welding so as to fix the hard seal on the lower surface of the edge of the LNG full-capacity tank steel dome; The soft seal is formed by overlapping soft seal soft plates, the soft seal soft plates are overlapped at the lower parts of the hard sealing plates, the overlapping width between the soft seal soft plates and the hard sealing plates is 160mm, the overlapping width between the soft seal soft plates is 150mm, and the residual width of the soft seal soft plates after overlapping the hard sealing plates is 200mm. As a preferred embodiment, the size of the fixing hole is 12 x 60mm, the distance between the centers of adjacent fixing holes is 414mm, the distance between the fixing holes on two sides and the front and rear edges of the hard sealing plate is 100mm, and the distance between the upper edge of the fixing plate hole and the upper edge of the hard sealing plate is 60mm. As a preferable implementation mode, the hard sealing plate is a zinc-plated iron sheet with 1442mm multiplied by 700mm, the thickness of the hard sealing plate is 1mm, and in actual use, the hard sealing plate adopts the zinc-plated iron sheet with the thickness of 1mm, has certain rigidity, and cannot deform excessively due to friction between a sealing system and the inner wall of the outer tank, so that a large amount of leakage failure is caused. As a preferred implementation mode, the soft sealing soft board is 2834mm multiplied by 360mm glass fiber cloth, the thickness of the soft sealing soft board is 1mm, in actual use, the soft sealing soft board made of glass fiber cloth has certain rigidity and elastic deformation capacity, certain elastic sealing requirements are met, and in the LNG full-capacity tank steel dome gas jacking process, the combined scheme of the hard sealing board made of galvanized iron sheet material and the soft sealing soft board made of glass fiber cloth is used, and the hard sealing and soft sealing technology is combined, so that the problems of high processing difficulty and poor sealing effect of sealing equipment in the prior art are solved, and the more efficient sealing effect and the simple and convenient installation process are realized. As a preferred embodiment, the first sealing adhesive tape is adhered to the lap joint between the hard sealing plates for sealing the gap, and the second sealing adhesive tape is adhered to the lap joint between the soft sealing plates for sealing the gap. As a preferred embodiment, a thick aluminum foil tape is glued at the lap joint between the hard sealing plate and the soft sealing plate. After the technical scheme is adopted, the utility model has the beneficial effects that 1. The combined scheme of the hard sealing plate made of galvanized iron sheet material and the soft sealing soft plate made of glass fiber cloth material is used, and the problems of high processing diffic