Sealing system for gas jacking of steel dome of storage tank

Abstract

The utility model provides a sealing system for gas jacking of a storage tank steel dome, which comprises a hard seal and a soft seal, the hard seal is formed by lapping a plurality of hard sealing plates end to end, the hard seal surrounds the periphery of the LNG full-capacity tank steel dome, the lapping width between the hard sealing plates is 100mm, the upper edge of each hard sealing plate is provided with four fixing holes which are distributed in a linear manner, and the soft seal is arranged in the fixing holes. A wedge is clamped in a hole in the center of the gantry plate, the wedge penetrates through the hole and is clamped tightly, and spot welding fixing is synchronously carried out on the wedge and the gantry plate so that the hard seal can be fixed to the lower surface of the edge of the steel dome of the LNG full-capacity tank. Compared with the prior art, the sealing device has the following beneficial effects that the combined scheme of the hard sealing plate made of galvanized sheet iron and the soft sealing plate made of glass fiber cloth is adopted, and the hard sealing technology and the soft sealing technology are combined, so that the problems of high processing difficulty and poor sealing effect of the sealing device in the prior art are solved; and a more efficient sealing effect and a simple and convenient installation process are realized.

Description

Technical Field

[0001] This utility model belongs to the field of dome air lifting sealing technology, and specifically relates to a sealing system for air lifting of steel domes of storage tanks. Background Technology

[0002] Traditional sealing processes suffer from difficulties in installation and dismantling, and unsatisfactory sealing effects. During the construction of large cryogenic storage tanks, a steel dome is required as a base form for the reinforced concrete outer tank roof during casting. Due to the excessive weight of the steel dome in large cryogenic storage tanks, it is typically lifted to the pressure ring using the pressure difference between the inside and outside of the tank, and then fixed by welding before the reinforced concrete outer tank roof is cast. During lifting, a seal is needed between the outer edge of the steel dome and the inner wall of the outer tank concrete to maintain the internal and external pressure difference. Therefore, we aim to design a novel dome air-lift sealing system to solve this problem. This application is an optimization based on Chinese Patent No. CN103899756B, "Sealing Equipment and Construction Technology for Gas Lifting Process of Steel Dome of LNG Full-Containment Tank," and Chinese Patent No. CN 203784298U, "Sealing Equipment for Gas Blowing Lifting Process of Dome of LNG Full-Containment Tank." Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sealing system for air jacking of steel domes of storage tanks, so as to solve the problems mentioned in the background art.

[0004] This utility model is achieved through the following technical solution: a sealing system for gas lifting of a steel dome of a storage tank, comprising: a hard seal and a soft seal. The hard seal is formed by overlapping multiple hard sealing plates end to end, which surround the steel dome of the LNG full-containment tank. The overlap width between the hard sealing plates is 100mm. A gantry plate is welded to the lower surface of the sealing hard plate of the LNG full-containment tank steel dome. Four fixing holes are opened along the upper edge of the hard sealing plate in a straight line. A wedge is inserted into the hole in the center of the gantry plate and the wedge passes through the hole and is locked. The purpose of spot welding the wedge and the gantry plate simultaneously is to fix the hard seal to the lower surface of the edge of the LNG full-containment tank steel dome.

[0005] The soft seal is formed by overlapping soft sealing plates. The soft sealing plates overlap the lower part of the hard sealing plate. The overlap width between the soft sealing plates and the hard sealing plate is 160mm, the overlap width between the soft sealing plates is 150mm, and the allowance width after the soft sealing plates overlap the hard sealing plate is 200mm.

[0006] In a preferred embodiment, the size of the fixing hole is 12*60mm, the distance between the centers of adjacent fixing holes is 414mm, the distance from the fixing holes on both sides to the first and last edges of the hard sealing plate is 100mm, and the distance from the upper edge of the fixing plate hole to the upper edge of the hard sealing plate is 60mm.

[0007] As a preferred embodiment, the hard sealing plate is a 1442mm×700mm galvanized iron sheet with a thickness of 1mm. In actual use, the hard sealing plate uses a 1mm thick galvanized iron sheet, which has a certain rigidity and will not deform excessively due to friction between the sealing system and the inner wall of the outer tank, thus preventing a large amount of air leakage and failure.

[0008] As a preferred embodiment, the soft sealing plate is a 2834mm×360mm glass fiber cloth with a thickness of 1mm. In actual use, the glass fiber cloth soft sealing plate has a certain rigidity and elastic deformation capacity, meeting certain elastic sealing requirements. In the process of gas lifting the steel dome of the LNG full-containment tank, a combination of a galvanized iron sheet hard sealing plate and a glass fiber cloth soft sealing plate is used. Combining hard sealing and soft sealing technologies, this solves the problems of high processing difficulty and poor sealing effect of the sealing equipment in the prior art, and achieves a more efficient sealing effect and a simpler installation process.

[0009] In a preferred embodiment, sealing tape is applied to the overlap between the hard sealing plates to seal the gap, and sealing tape is applied to the overlap between the soft sealing plates to seal the gap.

[0010] In a preferred embodiment, thick aluminum foil tape is glued to the joint where the hard sealing plate and the soft sealing plate overlap.

[0011] After adopting the above technical solution, the beneficial effects of this utility model are: 1. The combination of a hard sealing plate made of galvanized iron sheet and a soft sealing plate made of fiberglass cloth, which combines hard sealing and soft sealing technologies, solves the problems of difficult processing and poor sealing effect of sealing equipment in the prior art, and achieves a more efficient sealing effect and a simpler installation process.

[0012] 2. Hard sealing plates are installed one by one, with a designed overlap of 100mm between them to ensure a tight connection and meet the overlap requirements. After installation, the gaps between the hard sealing plates are sealed with sealing tape to prevent air leakage. Soft sealing plates are then installed one by one, with a 150mm overlap between them. The gaps between the soft sealing plates are sealed with sealing tape to prevent air leakage. The free-moving width of the soft seal is no less than 200mm. The overlap between hard and soft seals is 160mm. Thick aluminum foil tape is used to adhere the joints. This combination of hard and soft sealing, where the hard sealing plates provide hard sealing to increase strength and the soft sealing plates provide soft sealing to enhance performance, results in less pre-applied stress, reducing the workload of installation and removal. This improves the ease of installation, enhances sealing effect, reduces processing, and offers flexibility, simplicity, and ease of installation and removal. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of a sealing system for air jacking of a steel dome of a storage tank according to the present invention.

[0015] Figure 2 This is a schematic diagram of the fixing hole structure of a sealing system for air jacking of a steel dome of a storage tank according to the present invention.

[0016] Figure 3 This is a schematic diagram of the internal sealing structure of a sealing system for air jacking of a steel dome in a storage tank, according to the present invention.

[0017] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0018] In the diagram, 1-hard sealing plate, 2-soft sealing plate, 3-gantry plate, 4-wedge. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] As the first embodiment of this utility model:

[0021] Please see Figures 1 to 4 A sealing system for gas lifting of a steel dome of a storage tank includes: a hard seal and a soft seal. The hard seal is formed by overlapping multiple hard sealing plates 1 end to end, which surround the steel dome of the LNG full-containment tank. The overlap width between the hard sealing plates 1 is 100mm. A gantry plate 3 is welded to the lower surface of the sealing hard plate of the LNG full-containment tank steel dome. Four fixing holes are opened along the upper edge of the hard sealing plate 1 in a straight line. A wedge 4 is inserted into the hole in the center of the gantry plate 3 and the wedge 4 passes through the hole and is locked. The purpose of spot welding the wedge 4 and the gantry plate 3 simultaneously is to fix the hard seal to the lower surface of the edge of the LNG full-containment tank steel dome.

[0022] The soft seal is formed by overlapping the soft sealing plates 2. The soft sealing plates 2 overlap the lower part of the hard sealing plate 1. The overlap width between the soft sealing plates 2 and the hard sealing plate 1 is 160mm, the overlap width between the soft sealing plates 2 is 150mm, and the allowance width after the soft sealing plates 2 overlap the hard sealing plate 1 is 200mm.

[0023] Specifically, in practical use, a hard sealing plate 1 is installed, and a gantry plate 3 and wedges 4 are used to fix it to the lower surface of the hard sealing plate 1 on the steel dome. The gantry plate 3 is passed through the fixing hole on the hard sealing plate 1, and the two feet of the gantry plate 3 are welded to the lower surface of the hard sealing plate 1. Then, a triangular wedge 4 is passed through the center hole of the gantry plate 3 and the triangular wedge 4 is hammered to fix the hard seal to the lower surface of the edge of the steel dome of the LNG full-containment tank. In order to firmly fix the hard sealing plate 1 to the steel dome and ensure that the hard seal does not loosen or fall off as the steel dome moves during gas lifting, the wedges 4 are spot-welded to the gantry plate 3 after installation (in the existing technology, they are welded to the hard sealing plate 1) to prevent the triangular wedges 4 from loosening. The combination of a hard sealing plate 1 made of galvanized iron sheet and a soft sealing plate 2 made of fiberglass cloth, which combines hard sealing and soft sealing technologies, solves the problems of difficult processing of sealing equipment and poor sealing effect in the existing technology, and achieves a more efficient sealing effect and a simpler installation process.

[0024] As a second embodiment of this utility model:

[0025] Please see Figures 1 to 4The size of the fixing hole is 12*60mm, the distance between the centers of adjacent fixing holes is 414mm, the distance from the fixing holes on both sides to the first and last edges of the hard sealing plate 1 is 100mm, and the distance from the upper edge of the fixing plate hole to the upper edge of the hard sealing plate 1 is 60mm.

[0026] The hard sealing plate 1 is a galvanized iron sheet measuring 1442mm × 700mm with a thickness of 1mm. In actual use, the hard sealing plate 1 uses a galvanized iron sheet with a thickness of 1mm, which has a certain rigidity and will not deform excessively due to friction between the sealing system and the inner wall of the outer tank, thus preventing a large amount of air leakage and failure.

[0027] The soft sealing plate 2 is made of 2834mm×360mm fiberglass cloth with a thickness of 1mm. In practical use, the soft sealing plate 2 made of fiberglass cloth has a certain rigidity and elastic deformation capacity, which meets certain elastic sealing requirements. In the process of gas lifting of the steel dome of LNG full-containment tank, a combination scheme of hard sealing plate 1 made of galvanized iron sheet and soft sealing plate 2 made of fiberglass cloth is used. Combining hard sealing and soft sealing technologies, the problem of high processing difficulty and poor sealing effect of sealing equipment in the existing technology is solved, and a more efficient sealing effect and a simpler installation process are achieved.

[0028] Sealing tape 1 is applied to the overlap between the hard sealing plates 1 to seal the gap, and sealing tape 2 is applied to the overlap between the soft sealing plates to seal the gap.

[0029] Thick aluminum foil tape is glued to the joint where the hard sealing plate 1 and the soft sealing plate overlap.

[0030] Based on the first embodiment described above, further, the hard sealing plates 1 are installed one by one, with an overlap design value of 100mm between them to ensure a tight connection between the sealing plates and that the overlap meets the requirements. After the hard sealing plates 1 are installed, the gaps between them are sealed with sealing tape to prevent air leakage. The soft sealing plates are then installed one by one, with an overlap of 150mm between them. The gaps between the soft sealing plates are sealed with sealing tape to prevent air leakage. The width of the free-moving part of the soft seal is not less than 200mm. The overlap between the hard seal and the soft seal is 160mm. Thick aluminum foil tape is used to adhere the joints. This method combines hard and soft sealing, where the hard sealing plate 1 is the hard seal to increase the hard seal strength, and the soft sealing plate is the soft seal to enhance the sealing performance. This method of combining hard and soft sealing requires less pre-applied stress, reduces the workload of installing and removing the sealing system, helps to improve the ease of installation of the sealing system, improves the sealing effect, reduces the amount of processing, and has the characteristics of flexibility, simplicity, and ease of installation and removal.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing system for gas jacking of a steel dome of a storage tank, comprising: Hard seal and soft seal, characterized in that the hard seal is formed by multiple hard sealing plates (1) overlapping end to end, which surround the steel dome of the LNG full-containment tank. The overlap width between the hard sealing plates (1) is 100mm. A gantry plate (3) is welded to the lower surface of the sealing hard plate of the LNG full-containment tank steel dome. Four fixing holes are opened on the upper edge of the hard sealing plate (1) in a straight line. A wedge (4) is installed in the hole in the center of the gantry plate (3) and the wedge (4) passes through the hole and is locked. The purpose of spot welding the wedge (4) and the gantry plate (3) at the same time is to fix the hard seal on the lower surface of the edge of the LNG full-containment tank steel dome. The soft seal is formed by overlapping soft sealing plates (2). The soft sealing plates (2) overlap the lower part of the hard sealing plate (1). The overlap width between the soft sealing plates (2) and the hard sealing plate (1) is 160mm. The overlap width between the soft sealing plates (2) is 150mm. The margin width after the soft sealing plates (2) overlap the hard sealing plate (1) is 200mm.

2. The sealing system for gas jacking of a steel dome of a storage tank as described in claim 1, characterized in that: The size of the fixing hole is 12*60mm, the distance between the centers of adjacent fixing holes is 414mm, the distance from the fixing holes on both sides to the first and last edges of the hard sealing plate (1) is 100mm, and the distance from the upper edge of the fixing hole to the upper edge of the hard sealing plate (1) is 60mm.

3. The sealing system for gas jacking of a steel dome of a storage tank as described in claim 1, characterized in that: The hard sealing plate (1) is a galvanized iron sheet of 1442mm×700mm with a thickness of 1mm.

4. The sealing system for gas jacking of a steel dome of a storage tank as described in claim 1, characterized in that: The soft sealing plate (2) is a 2834mm×360mm glass fiber cloth with a thickness of 1mm.

5. A sealing system for air jacking of a steel dome of a storage tank as described in claim 1, characterized in that: The overlap between the hard sealing plates (1) is sealed with a sealing tape to seal the gap, and the overlap between the soft sealing plates is sealed with a sealing tape to seal the gap.

6. A sealing system for air jacking of a steel dome of a storage tank as described in claim 5, characterized in that: Thick aluminum foil tape is glued to the joint where the hard sealing plate (1) overlaps with the soft sealing plate.

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