CN-121993723-A - Liquefied natural gas storage tank film structure and liquefied natural gas storage tank

Abstract

The application discloses a liquefied natural gas storage tank film structure and a liquefied natural gas storage tank, which belong to the technical field of liquefied natural gas storage, wherein the liquefied natural gas storage tank film structure comprises a plurality of interconnected corrugated plate units, each corrugated plate unit comprises a base plate, spherical corrugations and connecting corrugations are formed on the base plate, each spherical corrugation is positioned in the center of the base plate, each connecting corrugation is positioned at the periphery of the corresponding spherical corrugation, one end of each connecting corrugation is connected with the corresponding spherical corrugation and penetrates through, the other end of each connecting corrugation extends to the edge of the base plate, two adjacent corrugated plate units are connected edge to edge, and the two connecting corrugations at the connecting position are connected and penetrate through.

Inventors

• DU LIANGPO
• SHEN QI
• WANG XINCHAO
• ZHANG SONG
• Cui Yamei
• ZENG JIAHONG
• LI ANMENG
• LI YANG
• NIU HAIZHONG
• ZHU PENGFEI
• PENG CHANGFEI
• MENG QINGPENG
• FU WEIQING
• MA QIANG
• YUAN YANG

Assignees

• 中国石油天然气管道工程有限公司
• 中国石油天然气集团有限公司
• 中国石油管道局工程有限公司

Dates

Publication Date

20260508

Application Date

20241108

Claims (10)

1. 1. A lng storage tank membrane structure comprising: a plurality of corrugated plate units connected to each other; The corrugated plate unit comprises a base plate, wherein spherical waves and connecting waves are formed on the base plate, the spherical waves are positioned at the center of the base plate, a plurality of connecting waves are positioned at the periphery of the spherical waves, one end of each connecting wave is connected and communicated with the spherical waves, and the other end of each connecting wave extends to the edge of the base plate; Two adjacent corrugated plate units are connected edge to edge, and two connecting corrugations at the connecting position are connected through.
2. 2. The lng storage tank membrane structure of claim 1, wherein: the shape of the substrate is set to be square, the corrugated plate unit comprises four connecting corrugations, and the four connecting corrugations are respectively corresponding to the four sides of the substrate and are respectively positioned at the midpoints of the four sides of the substrate.
3. 3. The lng storage tank membrane structure of claim 1, wherein: The spherical corrugation with connect corrugated junction is provided with first transition portion, spherical corrugation with the junction of base plate is provided with second transition portion, connect the ripple with the junction of base plate is provided with third transition portion, the cross-sectional shape of first transition portion, second transition portion and third transition portion all sets up to the arc.
4. 4. The lng storage tank membrane structure of claim 1, wherein: the height of the spherical corrugation protruding out of the substrate is larger than the height of the connecting corrugation protruding out of the substrate.
5. 5. The lng storage tank membrane structure of claim 4 wherein: the height of the spherical corrugation protruding out of the substrate is 100-200 mm, and the height of the connecting corrugation protruding out of the substrate is 50-120 mm.
6. 6. The lng storage tank membrane structure of claim 2, wherein: The side length of the substrate is set to be 1000mm-3000mm, and the thickness of the substrate is set to be 1.2mm-2mm.
7. 7. The lng storage tank membrane structure of claim 1, wherein: The corrugated plate unit is of a one-step stamping forming structure.
8. 8. An lng storage tank comprising an lng storage tank membrane structure as claimed in any one of claims 1 to 7.
9. 9. The liquefied natural gas storage tank as claimed in claim 8, wherein a plurality of said corrugated plate units are connected to each other to form a tank body, a sealed cavity for containing liquefied natural gas is formed inside said tank body, and said spherical corrugation and said connection corrugation are protruded toward an inner side of said sealed cavity.
10. 10. The liquefied natural gas storage tank as claimed in claim 9, wherein said liquefied natural gas storage tank further comprises a concrete outer tank, said concrete outer tank being positioned on an outer layer of said tank body.

Description

Liquefied natural gas storage tank film structure and liquefied natural gas storage tank Technical Field The application relates to the technical field of liquefied natural gas storage, in particular to a liquefied natural gas storage tank film structure and a liquefied natural gas storage tank. Background Liquefied natural gas (Liquefied Natural Gas, abbreviated as LNG) storage tanks are important as key storage facilities in the liquefied natural gas industry chain, and particularly in the construction of LNG receiving stations, the storage tanks are concerned by the industry due to huge investment, long construction period and high technical difficulty. In China, the construction of LNG storage tanks is mainly carried out by concrete full-capacity tanks for a long time, and in recent years, along with the progress of storage tank design and construction technologies, the construction of the thin film tanks develops heat and fire, and compared with the concrete full-capacity tanks, the thin film tanks have the remarkable advantages of high storage efficiency, high land utilization rate, low volume construction cost, no upper limit of storage tank volume and the like. Typical structures for membrane tanks include prestressed concrete outer tanks, membrane inner tanks, insulation systems, and other accessories, etc. The film corrugated plate is used as one of the core technologies of the inner tank, has multiple functions, can form a sealing space, transmits pressure to the concrete outer tank, and can offset expansion deformation caused by liquid inlet and outlet and temperature change through deformation of the corrugation. The corrugated plates are tightly connected in a lap welding mode to form a whole, and the corrugated plates have the characteristics of prefabrication, welding, high assembly speed and the like. In the related art, the corrugated plate adopts a structure that large and small corrugations are communicated with each other, the corrugations are continuous and divided into large and small corrugations, and a unique corrugated structure is formed at the intersection of the corrugations. Because the structure of fold part is complicated relatively, and the ripple form is different, this buckled plate is difficult to once only take shape when making, need carry out cold roll forming to big, little ripple and fold respectively, and the process is complicated, and the fold department processing degree of difficulty is great, leads to the defective goods to appear easily, has increased manufacturing cost and risk. Disclosure of Invention The application provides a liquefied natural gas storage tank film structure and a liquefied natural gas storage tank, and aims to solve the problems that an existing film corrugated plate is complex in structure, difficult to mold at one time and high in cost. The first aspect of the application provides a liquefied natural gas storage tank film structure, which comprises a plurality of corrugated plate units connected with each other, wherein each corrugated plate unit comprises a base plate, spherical waves and connecting waves are formed on the base plate, the spherical waves are positioned in the center of the base plate, the connecting waves are positioned on the periphery of the spherical waves, one end of each connecting wave is connected with the spherical waves and communicated, the other end of each connecting wave extends to the edge of the base plate, two adjacent corrugated plate units are connected edge to edge, and the two connecting waves at the connecting position are connected and communicated. Through the technical means, the spherical corrugation is arranged at the center of the base plate, and the plurality of connecting corrugations are arranged at the periphery of the base plate, so that the corrugated plate structure has good expansion and deformation capacity, the fatigue life requirement of the storage tank in the service period can be met, the whole structure is simple, the processing and the forming are easy, and the construction cost is reduced. Further, the shape of the base plate is set to be square, the corrugated plate unit includes four connection corrugations, and the four connection corrugations are respectively arranged corresponding to the four sides of the base plate and are respectively positioned at midpoints of the four sides of the base plate. Through the technical means, the corrugated plate units are regular in shape, symmetrical in structure and even in stress distribution, and meanwhile complexity of construction procedures is reduced. Further, the junction of spherical ripple with connect the ripple is provided with first transition portion, spherical ripple with the junction of base plate is provided with second transition portion, connect the ripple with the junction of base plate is provided with third transition portion, the cross-sectional shape of first transition portion, second transition portion and thir