Ceiling structures for storage tanks and storage tanks

Abstract

This disclosure relates to a ceiling structure for a storage tank and a storage tank. The ceiling structure includes multiple staggered circumferential beams and radial beams, wherein the circumferential beams at the edges are used to reserve working channels between themselves and the inner wall of the storage tank. The ceiling structure further includes: multiple sets of guide positioning components, each set including at least two guide positioning components, two guide positioning components being fixed radially spaced on the radial beams and / or the circumferential beams and forming through channels between themselves and the radial beams and / or the circumferential beams; and multiple telescopic beams, each telescopic beam slidably passing through the through channels and capable of extending beyond the circumferential beams at the edges to abut against the inner wall. The telescopic beams are locked and fixed by the guide positioning components, wherein the multiple telescopic beams and the multiple sets of guide positioning components are arranged one-to-one with the multiple radial beams. The ceiling structure for storage tanks provided by this disclosure simplifies construction operations after the ceiling is raised.

Description

Technical Field

[0001] This disclosure relates to the field of petrochemical storage tank technology, and more specifically, to a ceiling structure for a storage tank and a storage tank. Background Technology

[0002] In the field of petrochemical cryogenic storage tanks, a suspended ceiling structure is typically installed on the top of the tank. A common type of prefabricated suspended ceiling consists of hangers, ceiling panels, and a frame structure. The ceiling panels and frame structure are suspended below the outer top of the cryogenic storage tank by hangers to support the ceiling insulation material. During the construction of the roof and walls of some cryogenic storage tanks, a certain amount of space needs to be left between the suspended ceiling and the wall for edge operations and lifting. This edge space can be filled after the wall is installed by reducing the distance between the suspended ceiling and the wall and by laying edge insulation material. However, due to the dense arrangement of hangers, pipes, and corrugated sheets above the suspended ceiling, the space is compact, making construction operations inconvenient after the roof is raised. Summary of the Invention

[0003] The purpose of this disclosure is to provide a ceiling structure and a storage tank for a storage tank, which simplifies the construction operations after the roof is raised.

[0004] To achieve the above objectives, this disclosure provides a ceiling structure for a storage tank, the ceiling structure including a plurality of staggered circumferential beams and radial beams, wherein the circumferential beams at the edges are used to reserve a working channel between themselves and the inner wall surface of the storage tank, the ceiling structure further including: a plurality of sets of guide positioning components, each set of guide positioning components including at least two, the two guide positioning components being fixed radially spaced on the radial beams and / or the circumferential beams and forming a through channel between themselves and the radial beams and / or the circumferential beams; and a plurality of telescopic beams, each telescopic beam being slidably passing through the through channel and capable of extending beyond the circumferential beams at the edges to abut against the inner wall surface, the telescopic beams being locked and fixed by the guide positioning components, wherein the plurality of telescopic beams and the plurality of sets of guide positioning components are arranged one-to-one with the plurality of radial beams.

[0005] Optionally, the guiding and positioning assembly includes a guide and a locking member. The guide is fixed to the radial beam and / or the circumferential beam and forms the through-channel with the radial beam and / or the circumferential beam. The locking member passes through the guide to lock and fix the telescopic beam.

[0006] Optionally, the guide includes a mounting portion and a channel forming portion, the mounting portion being fixed on the radial beam and / or the circumferential beam, and the channel forming portion being disposed on one side of the mounting portion and forming the through-channel between the mounting portion and the radial beam and / or the circumferential beam.

[0007] Optionally, the guide is configured as a stepped plate, which includes a first horizontal plate and a second horizontal plate. The first horizontal plate is connected to the second horizontal plate via a bent plate. The first horizontal plate is fixed to the radial beam and / or the circumferential beam, and the second horizontal plate and the bent plate form the passage between the radial beam and / or the circumferential beam.

[0008] Optionally, the guide is constructed as a flat plate, with a portion of the flat plate fixed to the radial beam and another portion extending out of the radial beam to form the through-pass between it and the circumferential beam.

[0009] Optionally, the locking member includes a buffer portion and a pressing portion, the pressing portion passing through the buffer portion and the guide member in sequence to lock and fix the telescopic beam.

[0010] Optionally, the buffer portion is constructed as a pressure plate, and the clamping portion is constructed as a bolt, the bolt passing through the pressure plate and the guide member in sequence to lock and fix the telescopic beam.

[0011] Optionally, the ceiling structure further includes limiting members, which are fixedly disposed at opposite ends of the telescopic beam. The limiting members are used to abut against the guide positioning assembly when the telescopic beam slides to the edge to prevent the telescopic beam from dislodging from the through-channel.

[0012] Optionally, the limiting member is constructed as a limiting block, which is fixed to the opposite ends of the telescopic beam and protrudes from the telescopic beam.

[0013] Optionally, the ceiling structure further includes a circumferential connecting beam that connects two adjacent telescopic beams.

[0014] Optionally, the ceiling structure further includes an edge plate, which is laid in a laying plane enclosed by two adjacent telescopic beams, the circumferential beam, and the circumferential connecting beam.

[0015] Optionally, the ceiling structure further includes hangers and insulation blocks. One end of the hanger is fixed to the circumferential beam or the radial beam, and the other end is used to connect to the inner top of the outer tank in the storage tank. The circumferential beam and the radial beam are arranged alternately to form a grid structure, and the insulation blocks are laid on the grid structure and the edge plate.

[0016] Based on the above technical solutions, this disclosure also provides a storage tank, including an outer tank and an inner tank located inside the outer tank. The storage tank also includes the above-mentioned ceiling structure, which is suspended from the inner top of the outer tank by a hanger to close the top of the inner tank.

[0017] Through the above technical solution, in the ceiling structure for storage tanks provided in this disclosure, by fixing at least two guide positioning components radially spaced on radial beams and / or circumferential beams and forming a through-channel with the radial beams and / or circumferential beams, the circumferential beams or radial beams of the ceiling structure itself are used to form a through-channel with the guide positioning components. This allows the telescopic beam to be slidably installed within the through-channel, thereby forming a telescopic structure capable of free radial expansion and contraction. By allowing the telescopic beam to extend beyond the edge of the circumferential beam to abut against the inner wall surface and being locked in place by the guide positioning components, after the ceiling structure is raised, the extension length of the telescopic beam relative to the edge of the circumferential beam can be adjusted to correspond to the sealing requirements of different sized working channels reserved between the ceiling structure and the inner wall surface of the storage tank. Then, the guide positioning components are used to lock the telescopic beam in its current position, thus completing the construction of the basic framework required for sealing the working channel. Because the suspended ceiling structure for storage tanks disclosed herein can be connected to the suspended ceiling structure itself via the guide positioning component, the preparation work for the basic framework construction of the working passage sealing can be completed before the lifting of the ceiling is finished. That is, the telescopic beam can be slidably set in the through-channel formed by the guide positioning component and the radial or circumferential beam before the lifting of the ceiling is finished, thus preparing for the later extension of the telescopic beam and its contact with the inner wall of the storage tank. This eliminates the need to completely restart the preparation work for sealing the working passage after the lifting of the ceiling is completed, thereby simplifying the construction operations after the lifting of the ceiling and reducing the difficulty of high-altitude operations. Furthermore, because this disclosure can match working passages of different sizes through the extension and retraction of the telescopic beam, it has excellent adaptability to working passages of different sizes reserved between the suspended ceiling structure and the inner wall of the storage tank.

[0018] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a partial structural diagram of the suspended ceiling structure disclosed herein, in which the telescopic beam is in a retracted state;

[0021] Figure 2 This is a partial structural diagram of the suspended ceiling structure disclosed herein, in which the telescopic beam is in an extended state;

[0022] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 4This is a partial structural diagram of the suspended ceiling structure disclosed herein, in which multiple telescopic beams are shown.

[0024] Explanation of reference numerals in the attached figures

[0025] 1-Telescopic structure; 11-Guide positioning assembly; 111-Guide component; 1111-Step plate; 1111a-First horizontal plate; 1111b-Second horizontal plate; 1111c-Bending plate; 1112-Flat plate; 112-Locking component; 1121-Buffer part; 1121a-Pressure plate; 1122-Abutting part; 1122a-Bolt; 12-Through passage; 13-Telescopic beam; 14-Limiting component; 141-Limiting block; 2-Circumferential beam; 3-Radial beam; 4-Circumferential connecting beam; 5-Edge flat plate; 6-Cold insulation block; 7-Hanging rod. Detailed Implementation

[0026] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0027] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to "inner" and "outer" relative to the contour of the corresponding component itself. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. Additionally, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0028] This disclosure provides a ceiling structure for storage tanks, with reference to... Figures 1 to 4 As shown, the ceiling structure includes multiple staggered circumferential beams 2 and radial beams 3. The circumferential beams 2 at the edges are used to reserve a working channel between themselves and the inner wall of the storage tank. The ceiling structure also includes: multiple sets of guide positioning components 11, each set of guide positioning components 11 including at least two, the two guide positioning components 11 being fixed radially spaced on the radial beams 3 and / or the circumferential beams 2 and forming a through channel 12 between themselves and the radial beams 3 and / or the circumferential beams 2; and multiple telescopic beams 13, each telescopic beam 13 being slidably passed through the through channel 12 and able to extend beyond the circumferential beams 2 at the edges to abut against the inner wall. The telescopic beams 13 are locked and fixed by the guide positioning components 11. The multiple telescopic beams 13 and the multiple sets of guide positioning components 11 are arranged one-to-one with the multiple radial beams 3.

[0029] Through the above technical solution, in the ceiling structure for storage tanks provided in this disclosure, by fixing at least two guide positioning components 11 radially spaced on the radial beam 3 and / or the circumferential beam 2 and forming a through-channel 12 between them, the circumferential beam 2 or the radial beam 3 of the ceiling structure itself is used to form a through-channel 12 with the guide positioning components 11. This allows the telescopic beam 13 to be slidably set within the through-channel 12, thereby forming a telescopic structure 1 that can freely expand and contract radially. By allowing the telescopic beam 13 to extend beyond the edge of the circumferential beam 2 to abut against the inner wall surface and to be locked and fixed by the guide positioning components 11, after the ceiling structure is raised, the extension length of the telescopic beam 13 relative to the edge of the circumferential beam 2 can be adjusted to correspond to the sealing requirements of different sized working channels reserved between the ceiling structure and the inner wall surface of the storage tank. Then, the telescopic beam 13 is locked in the current position by combining with the guide positioning components 11, thus completing the construction of the basic frame required for sealing the working channel. Because the ceiling structure for storage tanks disclosed herein can be connected to the ceiling structure itself via the guide positioning component 11, the preparation work for the basic framework construction of the working passage sealing can be completed before the lifting of the ceiling is finished. That is, the telescopic beam 13 can be slidably set within the through-channel 12 formed by the guide positioning component 11 and the radial beam 3 or circumferential beam 2 before the lifting of the ceiling is finished. This prepares for the later extension of the telescopic beam 13 and its contact with the inner wall of the storage tank, eliminating the need to completely restart the preparation work for sealing the working passage after the lifting of the ceiling is completed. Therefore, the construction operation after the lifting of the ceiling can be simplified, thereby reducing the difficulty of high-altitude operations. Furthermore, because this disclosure can match working passages of different sizes through the extension and retraction of the telescopic beam 13, it has good adaptability to different sizes of working passages reserved between the ceiling structure and the inner wall of the storage tank. Specifically, to achieve smooth sliding of the telescopic beam 13, a suitable gap can be reserved between the telescopic beam 13 and the radial beam 3 during installation.

[0030] In the embodiments provided in this disclosure, reference is made to Figure 2 and Figure 3 As shown, the guide positioning assembly 11 includes a guide member 111 and a locking member 112. The guide member 111 is fixed to the radial beam 3 and / or the circumferential beam 2, forming a through-passage 12 between the guide member 111 and the radial beam 3 and / or the circumferential beam 2. The locking member 112 passes through the guide member 111 to lock and fix the telescopic beam 13. With this arrangement, the telescopic beam 13 can slide through the through-passage 12, and then the locking member 112, in conjunction with the guide member 111, locks and fixes the telescopic beam 13 in the desired position. Here, the through-passage 12 can have at least three possible implementations:

[0031] In a first exemplary implementation, at least two guide positioning components 11 each have their respective guide members 111 fixed at different positions on the same radial beam 3 at radial intervals, that is, all of these guide members 111 are fixed on the same radial beam 3.

[0032] In a second exemplary implementation, at least two guide positioning components 11 each have their respective guide members 111 fixed radially at corresponding positions on different circumferential beams 2, that is, all of these guide members 111 are fixed on the circumferential beams 2 and are located on different circumferential beams 2 respectively.

[0033] In a third exemplary implementation, at least two guide positioning components 11 each have their respective guide members 111 fixed radially at corresponding positions on the radial beam 3 and the circumferential beam 2. That is, a portion of these guide members 111 are fixed on the circumferential beam 2, while another portion is fixed on the radial beam 3. The guide members 111 on the circumferential beam 2 correspond one-to-one with different circumferential beams 2, while the portion of guide members 111 on the radial beam 3 are located at different positions on the same radial beam 3.

[0034] In the above three exemplary implementation methods, the through passage 12 is presented in different ways by adjusting the setting position of the guide members 111 in each guide positioning component 11. In the first and second implementation methods, since all the guide members 111 are fixed on the radial beam 3 or the circumferential beam 2 at the same time, the installation is relatively simple. In this case, the telescopic beam 13 installed in the through passage 12 is restricted on one side by the guide members 111 that are fixed on the radial beam 3 or the circumferential beam 2, so the range of motion of the telescopic beam 13 on one side is limited. At this time, the telescopic beam 13 can be installed in the through passage 12 radially or from the open other side, so the installation method is relatively flexible. In the third implementation, some guide members 111 are fixed to the radial beam 3, while others are fixed to the circumferential beam 2. The guide members 111, the radial beam 3, and the circumferential beam 2 together form a through-passage 12. When the telescopic beam 13 passes through the through-passage 12, both sides of the telescopic beam 13 will be restricted by either the radial beam 3 or the circumferential beam 2. That is, one side of the telescopic beam 13 is restricted by the radial beam 3, while the other side is restricted by the circumferential beam 2. At this time, the telescopic beam 13 needs to be installed radially in the through-passage 12. In this case, after the telescopic beam 13 is locked in its current position by the locking members 112 corresponding to each guide member 111, the forces on both sides of the telescopic beam 13 are balanced, which helps to extend its service life.

[0035] In the embodiments provided in this disclosure, the guide member 111 includes a mounting part and a channel forming part. The mounting part is fixed on the radial beam 3 and / or the circumferential beam 2. The channel forming part is disposed on one side of the mounting part and forms a through channel 12 between the guide member 111 and the radial beam 3 and / or the circumferential beam 2. With this arrangement, on the one hand, the guide member 111 can be fixed on the circumferential beam 2 or the radial beam 3. On the other hand, the through channel 12 formed between the guide member 111 and the circumferential beam 2 or the radial beam 3 can be used for the installation of the telescopic beam 13.

[0036] The guide member 111 can be constructed in any suitable manner, and this disclosure does not impose any restrictions on it. Optionally, the guide member 111 can be constructed as a stepped plate 1111, which includes a first horizontal plate 1111a and a second horizontal plate 1111b. The first horizontal plate 1111a is connected to the second horizontal plate 1111b through a bent plate 1111c. The first horizontal plate 1111a, the second horizontal plate 1111b, and the bent plate 1111c can be arranged with the radial beam 3 or the circumferential beam 2 in at least two of the following ways:

[0037] In the first exemplary implementation, refer to Figure 3 As shown, the first horizontal plate 1111a is fixed on the circumferential beam 2, and the second horizontal plate 1111b and the bent plate 1111c form a through channel 12 between them and the circumferential beam 2.

[0038] In a second exemplary implementation, the first horizontal plate 1111a is fixed to the radial beam 3, and the second horizontal plate 1111b and the bent plate 1111c form a through channel 12 between them and the circumferential beam 2.

[0039] In the two implementation methods described above, the inner side of the bending plate 1111c (that is, the side of the bending plate 1111c that contacts the telescopic beam 13) can restrict the range of motion of the telescopic beam 13 in the horizontal plane.

[0040] Optionally, refer to Figure 3 As shown, the guide 111 can also be constructed as a flat plate 1112, with part of the flat plate 1112 fixed on the radial beam 3 and the other part extending out of the radial beam 3 to form a through channel 12 between it and the circumferential beam 2. Here, the arrangement of the flat plate 1112 can greatly simplify the structure of the guide 111.

[0041] In the embodiments provided in this disclosure, the locking member 112 includes a buffer portion 1121 and a pressing portion 1122. The pressing portion 1122 passes through the buffer portion 1121 and the guide member 111 in sequence to lock and fix the telescopic beam 13. Here, the buffer portion 1121 can distribute the force from the pressing portion 1122 on the buffer portion 1121, avoiding direct contact between the pressing portion 1122 and the guide member 111 and thus preventing damage to the guide member 111, thereby improving the service life of the guide member 111.

[0042] The buffer portion 1121 and the abutment portion 1122 can be constructed in any suitable manner, and this disclosure does not impose any limitations on them. Alternatively, refer to Figure 3 As shown, the buffer part 1121 is constructed as a pressure plate 1121a, and the clamping part 1122 is constructed as a bolt 1122a. The bolt 1122a passes through the pressure plate 1121a and the guide member 111 in sequence to lock and fix the telescopic beam 13.

[0043] In the embodiments provided in this disclosure, the ceiling structure further includes a limiting member 14, which is fixedly disposed at opposite ends of the telescopic beam 13. The limiting member 14 is used to abut against the guide positioning component 11 when the telescopic beam 13 slides to the edge to restrict the telescopic beam 13 from dislodging from the through channel 12, while limiting the maximum sliding distance of the telescopic beam 13.

[0044] In the embodiments provided in this disclosure, the limiting member 14 can be constructed in any suitable manner, and this disclosure does not impose any limitations on it. Alternatively, refer to Figure 3 As shown, the limiting member 14 is constructed as a limiting block 141, which is fixed to both ends of the telescopic beam 13 and protrudes from the telescopic beam 13. Here, the limiting block 141 can be fixed by integral molding or by welding, etc., and this disclosure does not specifically limit this. In order to balance the load on the telescopic beam 13, counterweights can be added or removed from the limiting block 141 by bolt connection.

[0045] In the embodiments provided in this disclosure, reference is made to Figure 4 As shown, in order to lay the insulation blocks 6 made of insulation material on the base frame formed by the telescopic beam 13 and the circumferential beam 2 or the radial beam 3, a suspended ceiling structure including a circumferential connecting beam 4 and an edge plate 5 can also be set up. After the suspended ceiling structure is completed and raised, the entire structure is suspended below the inner top of the outer tank of the storage tank by the hangers 7. The circumferential connecting beam 4 connects two adjacent telescopic beams 13, and the edge plate 5 is laid within the laying plane enclosed by the two adjacent telescopic beams 13, the circumferential beam 2, and the circumferential connecting beam 4. Then, the insulation blocks 6 are laid on the edge plate 5. In addition, insulation blocks 6 also need to be laid on the grid structure formed by the staggered arrangement of the circumferential beams 2 and the radial beams 3.

[0046] Based on the above solution, this disclosure also provides a storage tank, which includes an outer tank and an inner tank located inside the outer tank. The storage tank also includes the aforementioned ceiling structure, which is suspended from the inner top of the outer tank by a hanger 7 to close the top of the inner tank.

[0047] It should be noted that all structures in this disclosure can be made of low-temperature resistant materials, such as stainless steel, aluminum alloy, or low-temperature carbon steel, to better adapt to low-temperature working conditions. Structures bearing larger loads require the use of high-strength, low-temperature resistant materials, such as stainless steel. Furthermore, the radial beams, circumferential beams, expansion beams, and circumferential connecting beams in this disclosure can all be constructed from one or more sections of profiles connected together. These profiles can be H-shaped, T-shaped, or I-shaped profiles, etc. Additionally, all connections between structures in this disclosure can be made in any suitable manner; for example, these connections can be welded or bolted.

[0048] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0050] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A ceiling structure for a storage tank, the ceiling structure comprising a plurality of staggered circumferential beams and radial beams, wherein, The circumferential beam at the edge is used to reserve a working channel between itself and the inner wall of the storage tank, characterized in that the ceiling structure further includes: Multiple sets of guide and positioning components, each set comprising at least two guide and positioning components, wherein the two guide and positioning components are fixed radially spaced on the radial beam and / or the circumferential beam and form a through channel with the radial beam and / or the circumferential beam; and Multiple telescopic beams, each of which is slidably passed through the through-channel and extends beyond the circumferential beam at the edge to abut against the inner wall surface, are secured by the guide positioning assembly. Among them, multiple telescopic beams and multiple sets of guide and positioning components are arranged one-to-one with multiple radial beams. The guiding and positioning assembly includes a guide and a locking member. The guide is fixed to the radial beam and / or the circumferential beam and forms the through-channel between the guide and the radial beam and / or the circumferential beam. The locking member passes through the guide to lock and fix the telescopic beam.

2. The ceiling structure according to claim 1, characterized in that, The guide includes a mounting portion and a channel forming portion. The mounting portion is fixed on the radial beam and / or the circumferential beam, and the channel forming portion is disposed on one side of the mounting portion and forms the through channel between the mounting portion and the radial beam and / or the circumferential beam.

3. The ceiling structure according to claim 2, characterized in that, The guide is constructed as a stepped plate, which includes a first horizontal plate and a second horizontal plate. The first horizontal plate is connected to the second horizontal plate through a bent plate. The first horizontal plate is fixed on the radial beam and / or the circumferential beam. The second horizontal plate and the bent plate form the passage between the radial beam and / or the circumferential beam.

4. The ceiling structure according to claim 2, characterized in that, The guide is constructed as a flat plate, part of which is fixed to the radial beam, and another part extends out of the radial beam to form the through-channel with the circumferential beam.

5. The ceiling structure according to claim 1, characterized in that, The locking component includes a buffer portion and a pressing portion, the pressing portion passing through the buffer portion and the guide portion in sequence to lock and fix the telescopic beam.

6. The ceiling structure according to claim 5, characterized in that, The buffer part is constructed as a pressure plate, and the clamping part is constructed as a bolt. The bolt passes through the pressure plate and the guide member in sequence to lock and fix the telescopic beam.

7. The ceiling structure according to claim 1, characterized in that, The ceiling structure also includes limiting members, which are fixedly disposed at opposite ends of the telescopic beam. The limiting members are used to abut against the guide positioning component when the telescopic beam slides to the edge to prevent the telescopic beam from dislodging from the through-channel.

8. The ceiling structure according to claim 7, characterized in that, The limiting component is constructed as a limiting block, which is fixed to the opposite ends of the telescopic beam and protrudes from the telescopic beam.

9. The ceiling structure according to claim 1, characterized in that, The ceiling structure also includes a circumferential connecting beam, which connects two adjacent telescopic beams.

10. The ceiling structure according to claim 9, characterized in that, The ceiling structure also includes an edge plate, which is laid in a laying plane enclosed by two adjacent telescopic beams, the circumferential beam, and the circumferential connecting beam.

11. The ceiling structure according to claim 10, characterized in that, The ceiling structure also includes hangers and insulation blocks. One end of the hanger is fixed to the circumferential beam or the radial beam, and the other end is used to connect to the inner top of the outer tank in the storage tank. The circumferential beam and the radial beam are arranged alternately to form a grid structure. The insulation blocks are laid on the grid structure and the edge plate.

12. A storage tank, comprising an outer tank and an inner tank located inside the outer tank, characterized in that, The storage tank further includes a ceiling structure according to any one of claims 1 to 11, the ceiling structure being suspended from the inner top of the outer tank by a hanger to close the top of the inner tank.

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