Vertical storage tank

Abstract

The present invention provides a vertical storage tank, and its ceiling includes: a ceiling base, including multiple radial beams and multiple circumferential beams; multiple radial beams are arranged in a circular array with the same center; each circumferential beam extends along the circumference of the circle and is connected to two adjacent radial beams; multiple tie rods are arranged in a circular arrangement about the center, and each tie rod extends in a vertical direction, including a first end plate, a transition section, and a second end plate connected in sequence from top to bottom; the transition section is a spiral structure formed by twisting around a vertical axis; the first end plate is connected and fixed to the inner wall of the vault of the outer tank; the second end plate is fitted with the connecting plate, and is fixedly connected to the connecting hole and the through hole through an adapted fastener. The tie rods are arranged in a circular arrangement, so that the weight of the entire ceiling is evenly distributed, and the transition section is a spiral structure that increases the torsional strength compared to the common rod-shaped structure, and can simultaneously ensure the pull resistance of the tie rod in the vertical direction and the shear resistance in the horizontal direction.

Description

Technical Field

[0001] The invention relates to the technical field of large-scale low-temperature vertical storage tanks, in particular to a vertical storage tank. Background Art

[0002] Vertical cryogenic storage tanks are increasingly used to store low-temperature media such as LNG or liquid ethylene due to their good cold-keeping and sealing properties. However, due to their complex structure and long construction period, the construction cost is relatively high.

[0003] The storage tank includes an outer tank and an inner tank. The inner tank is used to store low-temperature media. The outer tank is wrapped around the outer periphery of the inner tank, and an insulation layer is provided between the two cylinders. The top of the outer tank is in the shape of a spherical shell, which is sealed and connected to the upper end of its cylinder to form a whole. The top of the inner tank is a suspended ceiling, which is suspended on the inner side of the radial beam of the outer tank top cover plate by a pull rod. By laying insulation cotton on the suspended ceiling, the upper end opening of the inner tank is closed to insulate the inner tank.

[0004] Because the ceiling plate needs to be resistant to low temperatures, the existing technical solutions all use stainless steel materials and are assembled by welding, which makes the material cost too high, the construction and installation period is long, the labor intensity is high, and the construction cost is greatly increased. In addition, the overall weight of the ceiling made of stainless steel is heavy, which increases the stress on the outer tank top. Under earthquake conditions, the outer tank top cover structure is easily unstable, causing safety accidents. Summary of the invention

[0005] The object of the present invention is to provide a vertical storage tank to solve the problems of long installation period and increased tank top stress caused by the suspended ceiling of the storage tank being made of stainless steel materials welded in the prior art.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A vertical storage tank comprises an inner tank, an outer tank covering the inner tank and a suspended ceiling located inside the outer tank; the suspended ceiling comprises: a suspended ceiling base, comprising a plurality of radial beams and a plurality of circumferential beams; the plurality of radial beams are arranged in a circular array with the same center, and each of the radial beams extends horizontally in the radial direction of the circumference; each of the circumferential beams extends in the circumferential direction of the circumference and is connected to two adjacent radial beams; a connecting plate protruding in the vertical direction is provided on the radial beam, and the connecting plate is provided with a connecting hole; a plurality of tie rods are arranged in a circular array about the center and are arranged one by one with the plurality of radial beams; each of the tie rods extends in the vertical direction, comprising a first end plate, a transition section and a second end plate connected in sequence from top to bottom; the transition section is a spiral structure twisted around a vertical axis; the first end plate and the second end plate are both flat plate structures and are parallel to the vertical direction; the first end plate is connected and fixed to the inner wall of the vault of the outer tank; a through hole is provided on the second end plate; the second end plate is fitted with the connecting plate, and a fastener is inserted through the connecting hole and the through hole to form a fixed connection.

[0008] According to one embodiment of the present invention, the first end plate, the transition section and the second end plate are an integrated structure formed by twisting and deforming flat steel.

[0009] According to one embodiment of the present invention, the vertical storage tank also includes a plurality of mounting plates; the plurality of mounting plates are arranged one-to-one corresponding to the plurality of pull rods, and mounting holes are provided on the mounting plates; the first end plate is provided with through holes corresponding to the mounting holes; one end of each of the mounting plates is welded and fixed to the inner wall of the arch of the outer tank, and the other end of the mounting plate is fitted with the first end plate, so that the mounting holes and the through holes correspond and form a fixed connection through matching fasteners.

[0010] According to one embodiment of the present invention, the plurality of annular beams are divided into a plurality of groups, the annular beams of each group are located on the same circle, and the plurality of groups of annular beams are distributed in concentric circles along the radial intervals; the annular beam close to the center is the central annular beam; one end of the radial beam extends radially toward the direction close to the center and exceeds the central annular beam.

[0011] According to one embodiment of the present invention, the suspended ceiling also includes a plurality of peripheral ceiling panels with consistent outer dimensions; the peripheral ceiling panels are located between two adjacent radial beams and are horizontally laid and fixed on the upper surfaces of the two radial beams; the ends of the peripheral ceiling panels close to the center in the radial direction are flush with the outer edges of the central annular beams; the outer shape of the peripheral ceiling panels is adapted to the outer contour of the area enclosed by the two adjacent radial beams and the central annular beam.

[0012] According to one embodiment of the present invention, the suspended ceiling also includes a plurality of inner peripheral ceiling panels; each of the inner peripheral ceiling panels is located inside the central annular beam and is horizontally laid on the upper surface of the radial beam; the inner peripheral ceiling panel has an arc-shaped side edge to match the arc-shaped contour of the central annular beam, and the inner peripheral ceiling panel also has two straight edges perpendicular to each other, and the straight edges of two adjacent inner peripheral ceiling panels are relatively flush; a plurality of the inner peripheral ceiling panels can be spliced ​​and enclosed to form a circular panel that is flush with the outer contour of the central annular beam.

[0013] According to one embodiment of the present invention, the plurality of inner ceiling panels are divided into a plurality of groups, each group having two inner ceiling panels; the two inner ceiling panels in each group have the same outer dimensions and are symmetrically distributed about the same radial axis.

[0014] According to one embodiment of the present invention, the outer ceiling panel and the inner ceiling panel are both corrugated panels, each having a plurality of parallel ridges spaced in sequence; the ridges of the outer ceiling panel and the ridges of the inner ceiling panel are perpendicular to each other and are on the same horizontal plane.

[0015] According to one embodiment of the present invention, the radial beam includes a plurality of first radial beams and a plurality of second radial beams, the length of the first radial beams is greater than the length of the second radial beams; the plurality of first radial beams and the plurality of second radial beams are centrally symmetrically distributed about the center; any second radial beam is located between two adjacent first radial beams, and the end of the second radial beam close to the center in the radial direction does not exceed the end of the first radial beam.

[0016] According to an embodiment of the present invention, the upper surface of the circumferential beam is flush with the upper surface of the radial beam.

[0017] According to one embodiment of the present invention, the radial beam includes a first web and a first wing plate vertically connected, the first wing plate is horizontally arranged, and the connecting plate is vertically arranged on the first wing plate; the first web is located below the first wing plate; the first wing plates are symmetrically provided with through holes on both sides of the first web; the circumferential beam includes a second web and a second wing plate vertically connected, the second wing plate has notches at both ends along its own longitudinal direction for accommodating the first wing plates of two adjacent radial beams, and the second web is vertically welded to the inner side of the first webs of the two radial beams.

[0018] According to an embodiment of the present invention, the radial beams, the annular beams and the tie rods are all made of aluminum alloy.

[0019] It can be seen from the above technical solution that the vertical storage tank provided by the present invention has at least the following advantages and positive effects:

[0020] 1. During the construction and installation of the entire suspended ceiling, only some parts of the assembly require welding, and the rest of the parts, such as the connection between the tie rod and the ceiling base, are connected by fasteners. The entire installation process is simple, convenient, and fast, which greatly shortens the construction period, reduces construction costs, and improves market competitiveness. In addition, when prefabricating radial beams, the connecting plates can be connected to the radial beams, which can facilitate the subsequent connection of the radial beams with the tie rods directly through the connecting plates, thereby improving efficiency.

[0021] 2. The tie rods are arranged in a circle and connected one by one with the radial beams in a circle array, so that the weight of the entire ceiling is evenly distributed. The transition section of the tie rod is a spiral structure, which increases the torsional strength compared to the common rod structure, and can simultaneously ensure the vertical tensile strength and lateral shear resistance of the tie rod. The connection structure between the tie rod and the ceiling is relatively stable, which improves the stress condition of the ceiling, can maintain good stability in earthquake conditions, and improve the seismic performance of the ceiling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a vertical storage tank in an embodiment of the present invention.

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the suspended ceiling base.

[0024] Figure 3 Schematic diagram of the connection between radial beams and annular beams in an embodiment of the present invention.

[0025] Figure 4 Schematic diagram of the structure of the radial beam in an embodiment of the present invention.

[0026] Figure 5 It is a front view of the connection structure of the pull rod and the radial beam in an embodiment of the present invention.

[0027] Figure 6 It is a side view of the connection structure of the pull rod and the radial beam in an embodiment of the present invention.

[0028] Figure 7 It is a schematic diagram of the structure of the outer ceiling panel and the inner ceiling panel in an embodiment of the present invention.

[0029] Figure 8 Schematic diagram of the structure of the peripheral ceiling panel in an embodiment of the present invention.

[0030] Fig. 9 for Figure 8 AA section view.

[0031] Fig.10 It is a schematic diagram of the structure of the inner ceiling panel in an embodiment of the present invention.

[0032] Fig.11It is a schematic diagram of the assembly of the ceiling base and each ceiling panel in an embodiment of the present invention.

[0033] Fig.12 for Fig.11 Enlarged view of point B.

[0034] The following are the descriptions of the reference numerals:

[0035] 1-Inner tank,

[0036] 2-Outer tank,

[0037] 3-ceiling base, 31-radial beam, 311-first radial beam, 312-second radial beam, 313-third radial beam, 31a-first web, 31b-first wing, 33-circumferential beam, 331-center circumferential beam, 33a-second web, 33b-second wing, 301-through hole,

[0038] 4-tie rod, 41-first end plate, 42-second end plate, 43-transition section,

[0039] 51-outer ceiling board, 511-convex edge, 52-inner ceiling board, 521-arc side edge, 522-straight edge, 501-bolt hole,

[0040] 6-connecting plate, 601-connecting hole,

[0041] 7-Mounting plate, 701-Mounting hole,

[0042] 8- Top cover radial beams. DETAILED DESCRIPTION

[0043] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0044] This embodiment provides a low-temperature vertical storage tank, which has the characteristics of simple processing, convenient construction, stable structure, high safety, etc.

[0045] Please refer to Figure 1 , Figure 1 The specific structure of a vertical storage tank provided in this embodiment is shown. The vertical storage tank is a fully contained tank, which includes an inner tank 1, an outer tank 2 covering the inner tank 1, and a suspended ceiling located inside the outer tank 2. The inner tank 1 is used to store low-temperature media such as LNG, and there is an insulating interlayer between the outer tank 2 and the inner tank 1 to keep the medium at a low temperature. The suspended ceiling is located on the top of the inner tank 1, and the upper end opening of the inner tank 1 is closed by laying thermal insulation cotton on the suspended ceiling to insulate the inner tank 1.

[0046] The suspended ceiling comprises a suspended ceiling base 3 and a plurality of tie rods 4 .

[0047] In this embodiment, the ceiling base 3 is suspended below the outer tank 2 through the support of the pull rod 4, so that it is only connected to the radial beam 8 of the top cover of the outer tank 2 and has no direct contact with the inner tank 1. Specifically, there is a gap between the bottom surface of the ceiling base 3 and the top surface of the inner tank 1 in the height direction, which prevents the ceiling from being pulled and deformed and damaged when the inner tank 1 shrinks when it is cold.

[0048] Please refer to Figure 2 The ceiling base 3 includes a plurality of radial beams 31 and a plurality of circumferential beams 33. The plurality of radial beams 31 are arranged in a circumferential array with the same center, and each radial beam 31 extends horizontally along the radial direction of the circumference; each circumferential beam 33 extends along the circumferential direction of the circumference and is connected to two adjacent radial beams 31; a connecting plate 6 protruding in the vertical direction is provided on the radial beam 31 (the structure of the connecting plate 6 will be described later). Figure 3 As shown in the figure, the connecting plate 6 is provided with a connecting hole 601, and the connecting hole 601 is for a fastener to pass through to achieve connection and fixation with the pull rod 4.

[0049] The plurality of radial beams 31 are arranged in a circular array, and the spacing between any two adjacent radial beams 31 is equal, thereby ensuring that the center of gravity of the base structure is evenly distributed.

[0050] The lengths of the plurality of radial beams 31 are different, which can save materials and reduce costs without affecting the use effect.

[0051] by Figure 2 The viewing direction is based on the direction of the circle, with the direction close to the center of the circle being considered "inward" and the direction away from the center being considered "outward".

[0052] The outer ends of all radial beams 31 are located on the same circle, while the inner ends of the radial beams 31 are uneven, as shown in the following: the inner ends of some radial beams 31 are located on a circle with a larger size, the inner ends of other radial beams 31 are located on another circle with a smaller size distributed in concentric circles, and the inner ends of the remaining radial beams 31 are located on another circle with a smaller size. The purpose is that the closer the inner ends of the radial beams 31 are to the center, the smaller the space, and the gaps between adjacent radial beams 31 are gradually reduced, thereby avoiding interference between the radial beams 31.

[0053] Specifically, the radial beams 31 include a plurality of first radial beams 311 , a plurality of second radial beams 312 and a plurality of third radial beams 313 , the lengths of which decrease in sequence, and the length of the second radial beams 312 is between the first radial beams 311 and the third radial beams 313 .

[0054] The plurality of first radial beams 311 , the plurality of second radial beams 312 , and the plurality of third radial beams 313 are all distributed in a centrally symmetrical manner about the center.

[0055] Among them, the length of the first radial beam 311 is the largest, which can be approximately equal to the radius of the ceiling base 3. The number of the first radial beams 311 is specifically 4, and there is a small distance between the inner ends of two first radial beams 311 along the same diameter direction, and the inner ends of the two are almost coincident with the center. The inner ends of the remaining second radial beams 312 and the third radial beams 313 have a large distance from the center.

[0056] Any third radial beam 313 is located between two adjacent second radial beams 312, and the inner end of the third radial beam 313 close to the center in the radial direction does not exceed the inner end of the second radial beam 312. The inner end of the second radial beam 312 and the inner end of the third radial beam 313 are respectively located on two concentric circles, and the size of the circle where the inner end of the second radial beam 312 is located is smaller than the size of the circle where the inner end of the third radial beam 313 is located.

[0057] The annular beam 33 extends along the circumferential direction of the circle and is connected to two adjacent radial beams 31 .

[0058] Furthermore, the plurality of annular beams 33 are divided into a plurality of groups, and the annular beams 33 of each group are located on the same circle. The plurality of groups of annular beams 33 are distributed in concentric circles at intervals along the radial direction, thereby ensuring the stability of the center of gravity of the suspended ceiling base 3 .

[0059] The annular beam 33 close to the center is the central annular beam 331 .

[0060] One end (inner end) of all radial beams 31 extends radially toward the center and beyond the central annular beam 331, that is, the inner end of the radial beam 31 is located inside the central annular beam 331, which is used to provide support for the subsequent laying of ceiling panels inside the central annular beam 331. Compared with the traditional suspended ceiling whose central annular beam 331 is hollow and requires additional supporting parts, the above-mentioned suspended ceiling installation structure is more convenient and simple, which reduces the workload of the installers.

[0061] In this embodiment, the upper surface of the annular beam 33 is flush with the upper surface of the radial beam 31 , which facilitates the subsequent horizontal laying of the ceiling panels.

[0062] Please refer to Figure 3 , Figure 3 It is a side view of the connection structure of the radial beam 31 and the annular beam 33.

[0063] The radial beam 31 and the annular beam 33 are both T-shaped steels made of aluminum.

[0064] The radial beam 31 includes a first web 31a and a first wing 31b which are vertically connected. The first wing 31b is arranged horizontally, and the connecting plate 6 is vertically arranged on the first wing 31b; the first web 31a is located below the first wing 31b; the first wing 31b is symmetrically provided with through holes 301 on both sides of the first web 31a, and the through holes 301 are used for fasteners to penetrate to realize the connection and fixation of the radial beam 31 and the ceiling panel.

[0065] Please combine Figure 4 On the same side of the first wing plate 31 b, there are a plurality of through holes 301 which are spaced apart in the radial direction.

[0066] The annular beam 33 also includes a second web 33a and a second wing 33b connected vertically. The second wing 33b is horizontally arranged, and has notches at both ends of the second wing 33b along its longitudinal direction to accommodate the first wing 31b of two adjacent radial beams 31. The second web 33a is vertically welded to the inner side of the first web 31a of the two radial beams 31.

[0067] In the actual processing, the radial beam 31 can be prefabricated in the factory, and the bolt holes, i.e., through holes 301, with a diameter of 18 mm are processed on the surface of the radial beam 31 to ensure symmetry on both sides, and the holes are drilled at a fixed distance. The annular beam 33 is processed on site and can be cut on site as required. The radial beam 31 and the annular beam 33 are connected by welding. Since all the welding parts are fillet welds, all on-site construction is convenient and fast. In addition, the radial beam 31 and the annular beam 33 are connected by welding to form a whole, which is evenly and stably stressed and can be used as a base for laying corrugated aluminum plates.

[0068] Please refer to Figure 5 and Figure 6 , which shows the structure of the tie rod 4 and its connection with the radial beam 31.

[0069] The plurality of tie rods 4 are arranged in a circle about the center of the ceiling base 3 , and are disposed in one-to-one correspondence with the plurality of radial beams 31 .

[0070] Each tie rod 4 extends in the vertical direction, and comprises a first end plate 41, a transition section 43 and a second end plate 42 which are sequentially connected from top to bottom.

[0071] The transition section 43 is a spiral structure twisted around a vertical axis; the first end plate 41 and the second end plate 42 are both flat plate structures and parallel to the vertical direction. The first end plate 41 is connected and fixed to the inner wall of the vault of the outer tank 2. The second end plate 42 is provided with a through hole; the second end plate 42 is fitted with the connecting plate 6 on the radial beam 31, and a fastener is inserted through the connecting hole 601 and the through hole to form a fixed connection.

[0072] Preferably, the tie rod 4 is a flat steel structure made of aluminum, and the first end plate 41, the transition section 43 and the second end plate 42 are an integrated structure formed by the flat steel being twisted 720° to ensure the overall strength of the tie rod 4.

[0073] In this embodiment, the tie rods 4 are arranged in a circumferential manner and connected one by one with the radial beams 31 in a circumferential array, so that the weight of the entire ceiling is evenly distributed. At the same time, the transition section 43 of the tie rod 4 is a spiral structure, which increases the torsional strength compared to the common rod structure, and can simultaneously ensure the vertical tensile strength and lateral shear resistance of the tie rod 4. The connection structure between the tie rod 4 and the ceiling is relatively stable, which improves the stress condition of the ceiling, can maintain good stability in earthquake conditions, and improve the seismic performance of the ceiling.

[0074] The vertical storage tank further comprises a plurality of mounting plates 7 .

[0075] The number of mounting plates 7 , the number of tie rods 4 and the number of connecting plates 6 are all consistent.

[0076] The mounting plate 7 is provided with a mounting hole 701 for connecting and fixing the pull rod 4 .

[0077] During construction, the mounting plate 7 is kept vertically arranged, one end of the mounting plate 7 is vertically welded and fixed to the inner wall of the vault of the outer tank 2 (specifically, the radial beam 8 of the top cover of the outer tank 2), and the other end extends downward. Similarly, the connecting plate 6 is kept vertically arranged and vertically welded to the wing plate of the radial beam 31. Each mounting plate 7 and each connecting plate 6 are arranged in correspondence with each other up and down. The welding of the mounting plate 7 and the connecting plate 6 is carried out on-site, and since there are fewer welding parts and they are all fillet welds, on-site construction is convenient.

[0078] After the mounting plate 7 and the connecting plate 6 are welded and fixed, the pull rod 4 is connected to the two plates with bolts.

[0079] The first end plate 41 of the pull rod 4 is provided with a through hole 301 corresponding to the mounting hole 701. The first end plate 41 is fitted with the mounting plate 7, and the mounting hole 701 and the through hole 301 are made to correspond to each other and are bolted together by matching bolts. The second end plate 42 is fitted with the connecting plate 6, and is bolted together by matching bolts passing through the connecting hole 601 and the through hole 301.

[0080] In this embodiment, the connection between the pull rod 4 and the ceiling base 3 and the tank top is achieved by fasteners. The entire installation process is simple, convenient and fast, which greatly shortens the construction period, reduces construction costs and improves market competitiveness.

[0081] Please refer to further Figure 7 The ceiling also includes a plurality of outer ceiling panels 51 with the same outer dimensions and a plurality of inner ceiling panels 52 with different shapes.

[0082] The peripheral ceiling plate 51 is located between two adjacent radial beams 31 and is laid and fixed on the upper surface of the two radial beams 31 in the horizontal direction. In addition, the radial end of the peripheral ceiling plate 51 close to the center is flush with the outer edge of the central annular beam 331; the outer shape of the peripheral ceiling plate 51 is adapted to the outer contour of the area enclosed by the two adjacent radial beams 31 and the central annular beam 331.

[0083] All the inner ceiling panels 52 are located inside the central annular beam 331 and are horizontally laid on the upper surface of the radial beam 31. The inner ceiling panels 52 have an arc-shaped side edge 521 that matches the arc-shaped profile of the central annular beam 331. A plurality of inner ceiling panels 52 can be spliced ​​and enclosed to form a circular plate that is flush with the outer profile of the central annular beam 331. The arc-shaped side edge 521 is flush with the peripheral edge of the central annular beam 331.

[0084] Please refer to Figure 8 , the outer ceiling panel 51 is fan-shaped.

[0085] The peripheral ceiling panels 51 have the same size and high modularity. After prefabricating a plurality of peripheral ceiling panels 51, they are transported to the construction site and can be directly laid on the ceiling base 3 and finally fixed by bolts. The whole process is quick and convenient with high efficiency.

[0086] Please combine Fig. 9 During manufacturing, the outer ceiling plate 51 is formed by rolling an aluminum flat plate in the length direction through a rounding machine. After being pressed into a corrugated plate, a flat steel is vertically welded to the periphery of the aluminum plate to enclose and seal the aluminum plate. After welding is completed, bolt holes 501 with a diameter of 18 mm are machined on the periphery of the aluminum plate to match the through holes 301 on the radial beam 31.

[0087] The inner ceiling panel 52 is also processed in the same manner and is matched with the corrugated aluminum plate base through bolt holes 501 .

[0088] Due to the characteristics of the corrugated shape, both the outer ceiling panel 51 and the inner ceiling panel 52 have a plurality of parallel ridges 511 spaced apart from each other.

[0089] Furthermore, the plurality of ridges 511 are arranged at intervals along the length direction of the outer ceiling panel 51 and the inner ceiling panel 52 , that is, the extending direction of the ridges 511 is consistent with the width direction of each ceiling panel.

[0090] During assembly, the ridges 511 of the outer ceiling panel 51 and the ridges 511 of the inner ceiling panel 52 are vertically arranged on the same horizontal plane.

[0091] The inner ceiling panels 52 are divided into multiple groups, each group having two inner ceiling panels 52; the two inner ceiling panels 52 in each group have the same outer dimensions and are symmetrically distributed about the same radial axis, which is convenient for modular processing and manufacturing.

[0092] Different from the fan-shaped outer ceiling panel 51 , the shape of the inner ceiling panel 52 tends to be irregular.

[0093] The inner ceiling panel 52 has an arc-shaped side edge 521 and at least two straight edges 522 perpendicular to each other. The straight edges 522 of two adjacent inner ceiling panels 52 are relatively flush, which facilitates alignment during assembly and improves assembly accuracy.

[0094] Please refer to Fig.10 An inner ceiling panel 52 near the center is a quadrilateral, wherein only one side is arc-shaped, namely, an arc-shaped side edge 521 , and the other three sides are straight sides 522 .

[0095] The reason is that in the process of prefabricating the inner ceiling panels 52, the number and appropriate size of the inner ceiling panels 52 are determined according to the circumferential size of the central annular beam 331. First, a plurality of rectangular aluminum plates are machined, and then, in order to match the periphery of the central annular beam 331, only one side of the aluminum plate in the length direction needs to be cut off and processed to form an arc-shaped side edge 521, and finally, the aluminum plate is rolled along the length direction by a rounding machine to form a corrugated plate with convex ridges 511. Compared with the method of processing the aluminum plate into a fan shape, the steps and processes of the above-mentioned rectangular aluminum plate processing method are simpler, the variables are easier to control, and the production efficiency is high.

[0096] In this embodiment, the above-mentioned ceiling panels are connected to the ceiling base 3 by bolts, replacing the common welding.

[0097] Specifically, through holes 301 are symmetrically provided on both sides of the first wing plate 31b of the radial beam 31. Moreover, on the same side of the first wing plate 31b, there are multiple through holes 301, which are spaced apart in the radial direction. Multiple bolt holes 501 are symmetrically provided on the two side edges of the peripheral ceiling plate 51 in the radial direction; when the peripheral ceiling plate 51 is horizontally laid on the radial beam 31, its two side edges are respectively overlapped on the first wing plates 31b of the two adjacent radial beams 31, so that the through holes 301 and the bolt holes 501 correspond to each other up and down to achieve bolt connection and fixation.

[0098] A plurality of bolt holes 501 are spaced apart on the inner ceiling plate 52 to correspond to the through holes 301 on the radial beams 31 , and are bolted and fixed in the same manner.

[0099] The outer ceiling panel 51 and the inner ceiling panel 52 are both corrugated panels made of aluminum material, which are lightweight and have a significant weight reduction compared to stainless steel materials, thus saving construction costs and facilitating on-site construction and hoisting.

[0100] Please refer to Fig.11 , Fig.11It is a schematic diagram of the assembly of the corrugated ceiling base 3 and the corrugated outer ceiling board 51 and the inner ceiling board 52.

[0101] like Fig.12 As shown, the outer ceiling panels 51 are first laid on the outer periphery of the ceiling base 3 according to the area, and then the inner ceiling panels 52 are laid in the inner area of ​​the central annular beam 331, and each ceiling panel is bolted to the radial beam 31. The whole process does not require welding, and the on-site construction is simple and convenient. It can greatly save the ceiling construction time, shorten the construction period, and significantly reduce the construction cost.

[0102] In summary, the beneficial effects of the present invention are as follows:

[0103] 1. The ceiling base 3 is suspended under the outer tank 2 through the support of the pull rod 4, so that it is only connected to the radial beam 8 of the top cover of the outer tank 2 and has no direct contact with the inner tank 1. Specifically, there is a gap between the bottom surface of the ceiling base 3 and the top surface of the inner tank 1 in the height direction, which prevents the ceiling from being pulled and deformed and damaged when the inner tank 1 shrinks when it is cold.

[0104] 2. The radial beams 31, the annular beams 33 and the tie rods 4 are all made of aluminum alloy, which greatly reduces the weight compared with the stainless steel ceiling, saves the construction cost and facilitates the on-site construction and hoisting.

[0105] 3. The tie rods 4 are arranged in a circle and connected one by one with the radial beams 31 in a circle array, so that the weight of the entire ceiling is evenly distributed. The transition section 43 of the tie rod 4 is a spiral structure, which increases the torsional strength compared to the common rod structure, and can simultaneously ensure the vertical tensile strength and lateral shear resistance of the tie rod 4. The connection structure between the tie rod 4 and the ceiling is relatively stable, which improves the stress condition of the ceiling, can maintain good stability in earthquake conditions, and improve the seismic performance of the ceiling.

[0106] 4. For the construction and installation of the entire ceiling, only some parts need to be welded, and the rest are bolted. The entire installation process is simple, convenient and fast, which greatly shortens the construction time, reduces the construction cost and improves the market competitiveness.

[0107] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A vertical storage tank, It is characterized in that It comprises an inner tank, an outer tank covering the inner tank and a suspended ceiling located inside the outer tank; the suspended ceiling comprises: A ceiling base, comprising a plurality of radial beams and a plurality of circumferential beams; the plurality of radial beams are arranged in a circular array with the same center, each of the radial beams extending horizontally in the radial direction of the circle; each of the circumferential beams extending in the circumferential direction of the circle and connected to two adjacent radial beams; the radial beams are provided with connecting plates protruding in the vertical direction, the connecting plates being provided with connecting holes; A plurality of tie rods are arranged in a circle about the center and are provided one by one corresponding to the plurality of radial beams; each of the tie rods extends in the vertical direction, and comprises a first end plate, a transition section and a second end plate which are sequentially connected from top to bottom; the transition section is a spiral structure twisted around a vertical axis; the first end plate and the second end plate are both flat plate structures and are parallel to the vertical direction; the first end plate is connected and fixed to the inner wall of the vault of the outer tank; a through hole is provided on the second end plate; the second end plate is fitted with the connecting plate, and a fixed connection is formed by passing an adapted fastener through the connecting hole and the through hole; The first end plate, the transition section and the second end plate are an integrated structure formed by twisting and deforming flat steel; The lengths of the plurality of radial beams are different, the outer ends of all the radial beams are located on the same circle, and the inner end edges of the radial beams are uneven; The plurality of annular beams are divided into a plurality of groups, the annular beams of each group are located on the same circle, and the plurality of groups of annular beams are distributed in concentric circles along the radial intervals; the annular beam close to the center is the central annular beam; one end of the radial beam extends radially toward the direction close to the center and exceeds the central annular beam.

2. The vertical storage tank according to claim 1, Features: The vertical storage tank also includes a plurality of mounting plates; Multiple mounting plates are arranged in one-to-one correspondence with multiple pull rods, and mounting holes are provided on the mounting plates; a through hole corresponding to the mounting hole is provided on the first end plate; one end of each mounting plate is welded and fixed to the inner wall of the arch of the outer tank, and the other end of the mounting plate is fitted with the first end plate, so that the mounting hole and the through hole correspond and form a fixed connection through suitable fasteners.

3. The vertical storage tank according to claim 1, Features: The ceiling also includes a plurality of peripheral ceiling panels with the same outer dimensions; The outer ceiling panel is located between two adjacent radial beams and is laid and fixed on the upper surfaces of the two radial beams in the horizontal direction; the end of the outer ceiling panel close to the center in the radial direction is flush with the outer edge of the central annular beam; the outer shape of the outer ceiling panel is adapted to the outer contour of the area enclosed by the two adjacent radial beams and the central annular beam.

4. The vertical storage tank according to claim 3, Features: The ceiling also includes a plurality of inner surrounding ceiling panels; Each of the inner ceiling panels is located inside the central annular beam and is horizontally laid on the upper surface of the radial beam; the inner ceiling panel has an arc-shaped side edge to match the arc-shaped contour of the central annular beam, and the inner ceiling panel also has two straight edges perpendicular to each other, and the straight edges of two adjacent inner ceiling panels are relatively flush; multiple inner ceiling panels can be spliced ​​and enclosed to form a circular panel that is flush with the outer contour of the central annular beam.

5. The vertical storage tank according to claim 4, Features: The plurality of inner ceiling panels are divided into a plurality of groups, each group having two inner ceiling panels with the same outer dimensions and symmetrically distributed about the same radial axis.

6. The vertical storage tank according to claim 4, Features: The outer ceiling plate and the inner ceiling plate are both corrugated plates, each having a plurality of convex edges spaced in parallel in sequence; The convex edges of the outer ceiling plate and the convex edges of the inner ceiling plate are perpendicular to each other and are on the same horizontal plane.

7. The vertical storage tank according to claim 1, Features: The radial beams include a plurality of first radial beams and a plurality of second radial beams, the length of the first radial beams is greater than the length of the second radial beams; the plurality of first radial beams and the plurality of second radial beams are centrally symmetrically distributed about the center; Any second radial beam is located between two adjacent first radial beams, and an end portion of the second radial beam close to the center in the radial direction does not exceed an end portion of the first radial beam.

8. The vertical storage tank according to claim 1, Features: The upper surface of the annular beam is flush with the upper surface of the radial beam.

9. The vertical storage tank according to claim 1, Features: The radial beam comprises a first web and a first wing connected vertically, the first wing being arranged horizontally, and the connecting plate being arranged vertically on the first wing; the first web is located below the first wing; the first wing is arranged on both sides of the first web and symmetrically provided with through holes; The annular beam includes a second web and a second wing plate which are vertically connected. The second wing plate has notches at both ends along its longitudinal direction for accommodating the first wing plates of two adjacent radial beams. The second web is vertically welded to the inner sides of the first webs of the two radial beams.

10. The vertical storage tank according to any one of claims 1 to 9, Features: The radial beams, the annular beams and the tie rods are all made of aluminum alloy.

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