Large-diameter storage tank device and tank top structure thereof

Abstract

The utility model discloses a large-diameter storage tank device and a tank top structure thereof, belongs to the technical field of solar thermal power generation, and can solve the problem that the existing storage tank is difficult to meet the requirements of strength, stability and temperature difference collaborative deformation under the action of each load. The tank top structure includes: a central circular member; the radial main stress pieces are distributed along the outer side of the central circular component by a circle; the plurality of radial secondary stress pieces are respectively distributed between two adjacent radial primary stress pieces; the annular main stress pieces are arranged circle by circle in the circumferential direction of the central circular component, and one annular main stress piece is connected between every two adjacent radial main stress pieces and between the adjacent radial secondary stress piece and the radial main stress piece; the ends, close to the center circular component, of the radial secondary stress pieces are connected to the middles of the corresponding annular primary stress pieces. The utility model is used for the tank top structure of the storage tank.

Description

Technical Field

[0001] The utility model relates to a large-diameter storage tank device and a tank top structure thereof, belonging to the technical field of solar thermal power generation. Background Art

[0002] As we all know, molten salt can be used for large-scale heat storage in solar thermal power plants due to its high operating temperature, wide temperature range, good flow characteristics, and large heat capacity. It is currently the most widely used solar heat storage medium. Therefore, the diameter of the storage tanks for molten salt is getting larger and larger, and the height of the tank top is getting higher and higher. As an important part of the molten salt storage tank body, the tank top has a significant impact on the stability and reliability of the entire storage tank.

[0003] The span of the tank top structure corresponds to the diameter of the tank. Currently, the diameter of the tank is commonly 25 to 36 meters, and there are few technical applications for molten salt tanks with a diameter of 45 meters or more. For such a large-span tank top structure, it should not only meet the strength and stability requirements of the tank top under the weight of the top plate, maintenance, wind and construction loads, but also meet the problem of thermal expansion and deformation coordination of the two when the temperature of the molten salt pipeline and the temperature of the tank change asynchronously in the local area of ​​the salt inlet pipe. However, it is difficult for existing tanks to meet the strength, stability and temperature difference coordinated deformation requirements under various loads. Utility Model Content

[0004] The utility model provides a large-diameter storage tank device and a tank top structure thereof, which can solve the problem that the existing storage tanks are difficult to meet the requirements of strength, stability and temperature difference coordinated deformation under various loads.

[0005] On the one hand, the utility model provides a tank top structure of a large diameter storage tank device, the tank top structure comprising:

[0006] a central circular member;

[0007] A plurality of radial main force bearing members are distributed along the outer side of the central circular member, and one end of each of the radial main force bearing members is connected to the central circular member; each of the radial main force bearing members and the central axis of the central circular member are located on the same vertical plane; an end of each of the radial main force bearing members close to the central circular member is higher than an end of each of the radial main force bearing members away from the central circular member;

[0008] A plurality of radial secondary force bearing members are respectively distributed between two adjacent radial main force bearing members; each of the radial secondary force bearing members and the central axis of the central circular component are located on the same vertical plane;

[0009] A plurality of annular main force-bearing members are arranged in circles along the circumferential direction of the central circular member, and an annular main force-bearing member is connected between each two adjacent radial main force-bearing members, and between adjacent radial secondary force-bearing members and the radial main force-bearing members; the end of the radial secondary force-bearing member close to the central circular member is connected to the middle of the corresponding annular main force-bearing member.

[0010] Optionally, also include:

[0011] A plurality of annular secondary force-bearing members are arranged in circles along the circumferential direction of the central circular component and are spaced apart from the annular main force-bearing members; at least one annular secondary force-bearing member is connected between each two adjacent radial main force-bearing members, and between adjacent radial secondary force-bearing members and the radial main force-bearing members.

[0012] Optionally, also include:

[0013] A plurality of support rods, wherein every two support rods are distributed in an eight-shaped pattern between each annular main force-bearing member and an adjacent annular secondary force-bearing member close to one side of the central circular component, and the proximal ends of the two support rods distributed in an eight-shaped pattern are connected to the middle of the annular main force-bearing member, and the distal ends of the two support rods distributed in an eight-shaped pattern are respectively connected to the radial main force-bearing member and the radial secondary force-bearing member, or both are connected to the radial main force-bearing member.

[0014] Optionally, 1 / 3 of the multiple radial secondary stress-bearing members are recorded as long radial secondary stress-bearing members, and the remaining 2 / 3 are recorded as short radial secondary stress-bearing members; the length of the long radial secondary stress-bearing member is greater than that of the short radial secondary stress-bearing member;

[0015] The long radial secondary force bearing member is distributed between two adjacent radial main force bearing members; the short radial secondary force bearing member is distributed between the adjacent long radial secondary force bearing member and the radial main force bearing member.

[0016] Optionally, the central circular member, the radial main force-bearing member, the radial secondary force-bearing member, the annular main force-bearing member and the annular secondary force-bearing member are connected to each other to divide the tank top area into a plurality of blocks, and the area difference between all the blocks is less than a preset threshold.

[0017] Optionally, the central circular component includes:

[0018] Central ring;

[0019] A plurality of reinforcing rods are arranged in a staggered manner in the central ring in a horizontal and vertical manner, and both ends of each reinforcing rod are connected to the central ring.

[0020] Optionally, one end of each of the radial main force-bearing members close to the central circular component is connected to the connection between the central circular ring and the reinforcing rod.

[0021] Optionally, the radial secondary force-bearing member and the annular main force-bearing member are connected by a limited sliding node connection that can slide vertically.

[0022] Optionally, the support rod is connected to the annular main force-bearing member, the radial main force-bearing member and the radial secondary force-bearing member by adopting a limited sliding node connection method that can slide horizontally.

[0023] Optionally, the angle between two adjacent radial main force-bearing members is 16° to 22°.

[0024] On the other hand, the utility model provides a large diameter storage tank device, the device comprising:

[0025] Any of the above tank top structures;

[0026] An annular side wall, the top inner wall of which is connected to the end of the radial main force-bearing member of the tank top structure away from the central circular member;

[0027] The annular channel steel is connected to the top outer wall of the annular side wall for a circle.

[0028] The beneficial effects that the utility model can produce include:

[0029] The large-diameter storage tank device and its tank top structure provided by the utility model form a rigid structure similar to "arch" through a central circular member, a radial main force-bearing member, a radial secondary force-bearing member, and annular main force-bearing members, which serves as the main force-bearing skeleton of the tank top, thereby meeting the strength and stability requirements of the large-diameter tank top under the action of deadweight, maintenance and other loads. At the same time, the radial secondary force-bearing member and the annular main force-bearing member are connected by a limited sliding node connection method that can slide vertically, and the support rods and the annular main force-bearing member, the radial main force-bearing member and the radial secondary force-bearing member are connected by a limited sliding node connection method that can slide horizontally, thus solving the problems of deformation coordination and uneven stress release caused by temperature difference. According to the scale and diameter of the specific molten salt storage tank, the radial component system, the annular component system, and the intermediate support system of the utility model can form a typical unit, which is evenly and multi-levelly arranged along the tank top. The above jointly ensures the bearing capacity and durability requirements of molten salt storage tanks with a diameter of 45m or more within their designed service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the plane structure of the tank top structure provided by an embodiment of the utility model;

[0031] Figure 2 A schematic diagram of a partial structure of a tank top provided by an embodiment of the utility model;

[0032] Figure 3A schematic diagram of the structure of a central circular component provided by an embodiment of the utility model;

[0033] Figure 4 A schematic diagram of the side elevation structure of a radial main force bearing member provided in an embodiment of the utility model;

[0034] Figure 5 A schematic diagram of the connection structure between the center ring and the reinforcing rod provided in an embodiment of the utility model;

[0035] Figure 6 A schematic diagram of the connection structure between the radial main force-bearing member and the central circular member provided in an embodiment of the utility model;

[0036] Figure 7 Schematic diagram of the connection structure between the radial main force bearing member and the annular main force bearing member provided in the embodiment of the utility model Figure 1 ;

[0037] Figure 8 Schematic diagram of the connection structure between the radial main force bearing member and the annular main force bearing member provided in the embodiment of the utility model Figure 2 ;

[0038] Fig. 9 Schematic diagram of the connection structure of the annular main force-bearing member, the radial secondary force-bearing member and the support rod provided in the embodiment of the utility model Figure 1 ;

[0039] Fig.10 Schematic diagram of the connection structure of the annular main force-bearing member, the radial secondary force-bearing member and the support rod provided in the embodiment of the utility model Figure 2 ;

[0040] Fig.11 A schematic diagram of the connection structure between the annular side wall, the annular channel steel, and the radial main force-bearing member provided in an embodiment of the utility model.

[0041] Reference numerals:

[0042] 1. Radial main load-bearing member; 2. Long radial secondary load-bearing member; 3. Center ring; 4. Reinforcement rod; 5. Annular main load-bearing member; 6. Annular secondary load-bearing member; 7. Support rod; 8. Annular channel steel; 9. Special-shaped connecting plate; 10. Short radial secondary load-bearing member; 11. Bolt hole; 12. Annular side wall. DETAILED DESCRIPTION

[0043] The present invention is described in detail below in conjunction with embodiments, but the present invention is not limited to these embodiments.

[0044] The utility model embodiment provides a tank top structure of a large diameter storage tank device, such as Figures 1 to 11 As shown, the tank top structure includes:

[0045] Central circular component.

[0046] A plurality of radial main force bearing members 1 are distributed around the outer side of the central circular component, and one end of each radial main force bearing member 1 is connected to the central circular component; each radial main force bearing member 1 is located on the same vertical plane as the central axis of the central circular component; an end of each radial main force bearing member 1 close to the central circular component is higher than an end away from the central circular component.

[0047] A plurality of radial secondary force bearing members are respectively distributed between two adjacent radial main force bearing members 1; each radial secondary force bearing member and the central axis of the central circular component are located on the same vertical plane.

[0048] Multiple annular main force-bearing members 5 are arranged in circles along the circumferential direction of the central circular component. An annular main force-bearing member 5 is connected between every two adjacent radial main force-bearing members 1, and between adjacent radial secondary force-bearing members and radial main force-bearing members 1; the end of the radial secondary force-bearing member close to the central circular component is connected to the middle of the corresponding annular main force-bearing member 5.

[0049] Furthermore, the tank top structure also includes: a plurality of annular secondary force-bearing members 6, which are arranged in circles along the circumferential direction of the central circular component and are spaced apart from the annular main force-bearing members 5; at least one annular secondary force-bearing member 6 is connected between every two adjacent radial main force-bearing members 1, and between adjacent radial secondary force-bearing members and radial main force-bearing members 1.

[0050] Preferably, the tank top structure also includes: a plurality of support rods 7, wherein every two support rods 7 are distributed in an eight-shaped pattern between each annular main force-bearing member 5 and the adjacent annular secondary force-bearing member 6 on the side close to the central circular member, and the proximal ends of the two support rods 7 distributed in an eight-shaped pattern are connected to the middle of the annular main force-bearing member 5, and the distal ends of the two support rods 7 distributed in an eight-shaped pattern are respectively connected to the radial main force-bearing member 1 and the radial secondary force-bearing member, or both are connected to the radial main force-bearing member 1.

[0051] The radial secondary force bearing member and the annular main force bearing member 5 are connected by a limited sliding node connection method capable of vertical sliding.

[0052] The support rod 7 is connected to the annular main force bearing member 5, the radial main force bearing member 1 and the radial secondary force bearing member by a limited sliding node connection method capable of horizontal sliding.

[0053] The tank top structure of the utility model is mainly composed of a central component system, a radial component system, a circumferential component system and an intermediate support system.

[0054] Among them, the central component system is a central circular component, which is composed of a central circular ring 3 and a plurality of reinforcing rods 4. The plurality of reinforcing rods 4 are arranged in a horizontal and vertical manner in the central circular ring 3, and both ends of each reinforcing rod 4 are connected to the central circular ring 3. The central circular ring 3 is a circular closed I-section steel beam, and the central circular ring 3 is provided with transverse and longitudinal reinforcing rods 4. The reinforcing rods 4 are I-section steel beams, and the cross-sectional specifications should be consistent with the central circular ring 3; the plurality of reinforcing rods 4 and the reinforcing rods 4 and the central circular ring 3 are rigidly welded. The central circular component is set at the highest point of the tank top, and its center coincides with the center of the entire tank top. The centerline positioning diameter d of the central circular ring 3 is generally about 0.2 to 0.3 times the tank diameter D. For example, the centerline positioning diameter d can be set to 0.2 times, 0.25 times or 0.3 times the tank diameter D. The central circular component as a whole plays the role of a central reinforcing pressure ring, and can be used as the upper fixed end of the "arch" structure. It should be noted that one end of each radial main force-bearing member 1 close to the central circular component is connected to the connection between the central ring 3 and the reinforcing rod 4, that is, the position of the internal transverse and longitudinal reinforcing rods 4 should correspond to the radial main force-bearing member 1 on the outside of the central ring 3, and the outer side of the central ring 3 is rigidly welded to the radial main force-bearing member 1, which makes it easier to bear the force on the tank top.

[0055] The above-mentioned radial component system is mainly composed of radial main force-bearing members 1 and radial secondary force-bearing members. The radial main force-bearing member 1 adopts the same I-shaped cross-section as the center ring 3, and the radial secondary force-bearing member adopts an I-shaped cross-section, and its cross-sectional height is 0.5 to 0.7 times that of the radial main force-bearing member 1. For example, the cross-sectional height of the radial secondary force-bearing member can be set to 0.5 times, 0.6 times or 0.7 times that of the radial main force-bearing member 1. In the plane layout, the angle between two adjacent radial main force-bearing members 1 is 16° to 22°, and multiple radial main force-bearing members 1 are evenly arranged.

[0056] The radial secondary force bearing members are evenly and alternately arranged between every two radial main force bearing members 1. Specifically, 1 / 3 of the multiple radial secondary force bearing members are recorded as long radial secondary force bearing members 2, and the remaining 2 / 3 are recorded as short radial secondary force bearing members 10; the length of the long radial secondary force bearing member 2 is greater than the short radial secondary force bearing member 10; the long radial secondary force bearing member 2 is distributed between two adjacent radial main force bearing members 1; and the short radial secondary force bearing member 10 is distributed between the adjacent long radial secondary force bearing member 2 and the radial main force bearing member 1. In practical applications, the length of the long radial secondary force bearing member 2 can be twice that of the short radial secondary force bearing member 10.

[0057] The radial main and secondary load-bearing members gradually change length from the center to the edge, so that the tank top area shared by each radial load-bearing member is basically the same. At the same time, this arrangement evenly divides the tank top into several divergent "fan-shaped" units, and the tank top plate is also divided into regular fan-shaped blocks, which is convenient for hoisting and on-site construction. In the vertical layout, each radial main load-bearing member 1 is "arched" and rigidly welded to the central circular member. The arch height ratio (H / 0.5D) should be controlled at 1 / 7 to 1 / 5, forming the main load-bearing skeleton of the tank top.

[0058] The above-mentioned annular component system is composed of annular main load-bearing members 5 and annular secondary load-bearing members 6. The annular main load-bearing member 5 adopts a circular steel tube section, and its two ends are rigidly connected to the radial main load-bearing member 1 and the radial secondary load-bearing member respectively. At the same time, the middle position is used as a support seat for the radial secondary load-bearing member. The two are connected by a limited slip node connection method; specifically, the limited slip node connection method is composed of a special-shaped connecting plate 9, a bolt hole 11 and bolts. Fig. 9 and Fig.10 As shown, the connection between the annular main force-bearing member 5 and the long radial secondary force-bearing member 2 and the supporting rod 7 is taken as an example for explanation, and the connection between the annular main force-bearing member 5 and the short radial secondary force-bearing member 10 and the supporting rod 7 is similar. The special-shaped connecting plate 9 between the long radial secondary force-bearing member 2 and the annular main force-bearing member 5 should be arranged vertically, one end of the special-shaped connecting plate 9 is semicircular and rigidly connected to the annular main force-bearing member 5, and the other end is a vertical section and is connected to the web of the long radial secondary force-bearing member 2 through a bolt hole 11 and a bolt. This bolt hole 11 is a symmetrical elliptical hole, the minor axis length of the bolt hole 11 is 2 to 3 mm larger than the bolt diameter, and the major axis radius of the bolt hole 11 is 1.5 times the bolt diameter. The opening direction of the elliptical hole should be the same as the vertical arrangement direction of the special-shaped connecting plate 9. The purpose of this arrangement is that when the temperature of the molten salt pipeline and the temperature of the storage tank change asynchronously in the local area, the long radial secondary load-bearing member 2 can be deformed upward or downward vertically. At this time, the long radial secondary load-bearing member 2 can move vertically in a limited manner in the special-shaped connecting plate 9 through the vertical elliptical hole, which adapts to the uneven deformation due to temperature difference. At the same time, the node connection can release uneven internal force compared to the fully rigid connection, which is beneficial to the safety and durability of the structural member.

[0059] The annular secondary force-bearing member 6 is connected to the radial secondary force-bearing member and the radial main force-bearing member 1 at only two ends, and adopts a circular steel tube section, whose diameter is between 0.6 and 0.7 times that of the annular main force-bearing member 5. In the plane layout, the annular main and secondary force-bearing members are arranged in circles with equal spacing from the center to the edge. The annular main and secondary force-bearing members all adopt a circular steel tube section. The purpose is that the annular main and secondary force-bearing members are basically evenly tensile or compressed, and the circular section is used for clear force transmission and reasonable force.

[0060] The above-mentioned intermediate support system, i.e., the support rod 7, adopts a round steel pipe cross-section, and both ends thereof are connected to the annular members and radial members by a limited slip node connection method. The limited slip node connection method here is basically the same as the above-mentioned one, except for the shape and setting direction of the special-shaped connecting plate 9. The special-shaped connecting plate 9 corresponding to the support rod 7 should be arranged horizontally, and one end of the special-shaped connecting plate 9 is connected to the middle position of the annular main force-bearing member 5 in a straight line, and the other end is a multi-fold line, and the fold line angles are respectively set at 90° to the axial direction of the support rod 7. At the same time, the direction of the elliptical bolt hole 11 is the same as the direction of each support axis. This arrangement method allows limited axial movement in the special-shaped connecting plate 9 through the horizontal elliptical bolt hole 11 when the support rod 7 undergoes tensile and compressive displacement deformation, which adapts to the uneven deformation due to temperature difference. At the same time, the node connection can release uneven internal forces compared to the full rigid connection, which is beneficial to the safety and durability of the structural member.

[0061] In the embodiment of the utility model, the central circular member, the radial main force bearing member 1, the radial secondary force bearing member, the annular main force bearing member 5 and the annular secondary force bearing member 6 are connected to each other to divide the tank top area into several blocks, and the area difference between all blocks is less than the preset threshold. The purpose of this arrangement is to make the area of ​​each block basically consistent, so that the force is more uniform.

[0062] Another embodiment of the utility model provides a large diameter storage tank device, the device comprising:

[0063] Any of the above tank top structures;

[0064] The annular side wall 12 has a top inner wall connected to the end of the radial main force bearing member 1 of the tank top structure away from the central circular member;

[0065] The annular channel steel 8 is connected to the top outer wall of the annular side wall 12 around one circle.

[0066] The annular channel steel 8 of the utility model forms a closed shape along the top outer wall of the annular side wall 12, wherein the upper and lower sides of the web of the annular channel steel 8 are rigidly welded to the outer wall plate of the annular side wall 12, and the lower end of the radial main force-bearing member 1 is rigidly welded to the top inner wall plate of the annular side wall 12. At this time, the annular channel steel 8, the annular side wall 12 wall plate, and the radial main force-bearing member 1 are interconnected as a whole, and the annular channel steel 8 plays a good role in strengthening and transitioning the internal force transmitted from the radial main force-bearing member 1, thereby ensuring the overall coordinated work of the tank top structure and the tank wall.

[0067] The large-diameter storage tank device and its tank top structure provided by the utility model are rigidly connected to each other in an approximately "arch" structure through the central circular member, the radial main force-bearing member 1, and the annular channel steel 8, which serve as the main force-bearing skeleton of the tank top, meeting the strength and stability requirements of the large-diameter tank top under the action of deadweight, maintenance and other loads; at the same time, each radial secondary force-bearing member, the annular member system and the intermediate support system are connected to the main force-bearing skeleton through a limited rigidity sliding node connection method, solving the problems of deformation coordination and unbalanced internal stress caused by temperature difference. This kind of rigid and flexible overall structural system, with each component working in coordination, has a clear and reliable force transmission path, ensuring the bearing capacity and durability requirements of the tank top of a storage tank with a diameter of 45m or more.

[0068] At the same time, according to the different diameters of specific molten salt storage tanks, the radial component system, the annular component system, and the intermediate support system can form a typical unit, which is evenly and multi-levelly arranged along the tank top, and can realize the tank top structure of molten salt storage tanks of various sizes, with a wide range of applications. In addition, each component of the structural system is a finished profile, which can be purchased, processed and manufactured in a standardized manner, which is conducive to the promotion and application of the structure of the utility model.

[0069] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A tank top structure for a large diameter storage tank device, characterized in that: The tank top structure comprises: a central circular member; A plurality of radial main force bearing members are distributed along the outer side of the central circular member, and one end of each of the radial main force bearing members is connected to the central circular member; each of the radial main force bearing members and the central axis of the central circular member are located on the same vertical plane; an end of each of the radial main force bearing members close to the central circular member is higher than an end of each of the radial main force bearing members away from the central circular member; A plurality of radial secondary force bearing members are respectively distributed between two adjacent radial main force bearing members; each of the radial secondary force bearing members and the central axis of the central circular component are located on the same vertical plane; A plurality of annular main force-bearing members are arranged in circles along the circumferential direction of the central circular member, and an annular main force-bearing member is connected between each two adjacent radial main force-bearing members, and between adjacent radial secondary force-bearing members and the radial main force-bearing members; the end of the radial secondary force-bearing member close to the central circular member is connected to the middle of the corresponding annular main force-bearing member.

2. The tank top structure according to claim 1, characterized in that: Also includes: A plurality of annular secondary force-bearing members are arranged in a circle along the circumferential direction of the central circular member and are spaced apart from the annular primary force-bearing members; At least one annular secondary force bearing member is connected between every two adjacent radial main force bearing members, and between each adjacent radial secondary force bearing member and the radial main force bearing member.

3. The tank top structure according to claim 2, characterized in that: Also includes: A plurality of support rods, wherein every two support rods are distributed in an eight-shaped pattern between each annular main force-bearing member and an adjacent annular secondary force-bearing member close to one side of the central circular component, and the proximal ends of the two support rods distributed in an eight-shaped pattern are connected to the middle of the annular main force-bearing member, and the distal ends of the two support rods distributed in an eight-shaped pattern are respectively connected to the radial main force-bearing member and the radial secondary force-bearing member, or both are connected to the radial main force-bearing member.

4. The tank top structure according to claim 2, characterized in that: One third of the plurality of radial secondary stress-bearing members are recorded as long radial secondary stress-bearing members, and the remaining two thirds are recorded as short radial secondary stress-bearing members; the length of the long radial secondary stress-bearing member is greater than that of the short radial secondary stress-bearing member; The long radial secondary force bearing member is distributed between two adjacent radial main force bearing members; the short radial secondary force bearing member is distributed between the adjacent long radial secondary force bearing member and the radial main force bearing member.

5. The tank top structure according to claim 2, characterized in that: The central circular member, the radial main force-bearing member, the radial secondary force-bearing member, the annular main force-bearing member and the annular secondary force-bearing member are connected to each other to divide the tank top area into a plurality of blocks, and the area differences between all the blocks are less than a preset threshold.

6. The tank top structure according to claim 1, characterized in that: The central circular member comprises: Central ring; A plurality of reinforcing rods are arranged in a staggered manner in the central ring in a horizontal and vertical manner, and both ends of each reinforcing rod are connected to the central ring.

7. The tank top structure according to claim 6, characterized in that: One end of each of the radial main force bearing members close to the central circular component is connected to the connection between the central circular ring and the reinforcing rod.

8. The tank top structure according to claim 1, characterized in that: The radial secondary force bearing member and the annular main force bearing member are connected by a limited sliding node connection mode capable of vertical sliding.

9. The tank top structure according to claim 3, characterized in that: The support rod is connected to the annular main force-bearing member, the radial main force-bearing member and the radial secondary force-bearing member by adopting a limited sliding node connection method capable of horizontal sliding.

10. A large diameter storage tank device, characterized in that: The device comprises: The tank roof structure according to any one of claims 1 to 9; An annular side wall, the top inner wall of which is connected to the end of the radial main force-bearing member of the tank top structure away from the central circular member; The annular channel steel is connected to the top outer wall of the annular side wall for a circle.

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