Flame-retardant and anti-explosion integrated sandwich type protection device for protecting ground vertical storage tank

Abstract

The invention discloses a flame-retardant and anti-explosion integrated sandwich type protection device for protecting a ground vertical storage tank, and belongs to the field of industrial design of protection structures of energy facilities and chemical storage facilities. The storage tank and protection structure comprises a top gradient foamed aluminum sandwich module, a side wall gradient foamed aluminum sandwich module, a top foamed aluminum corrugated sandwich plate, a side wall foamed aluminum corrugated sandwich plate, a top and side wall sandwich plate connecting reinforcing rib, an upper layer steel supporting frame, a flexible flame-retardant net, a lower layer I-shaped steel supporting frame and a storage tank and protection structure connecting base. The storage tank can meet the 1100-DEG C high-temperature use environment, can be used for resisting explosion impact, impact fragments and falling of high-temperature fragments and is of a flame-retardant / explosion-proof integrated sandwich type protection structure, external impact can be effectively prevented, and high-energy fragments generated after the top of the storage tank body explodes and is torn can be prevented from splashing.

Description

Technical Field

[0001] The present invention belongs to the field of industrial design of protective structures of energy facilities and chemical storage facilities, and in particular relates to a flame retardant and explosion-resistant integrated sandwich protective device for protecting ground vertical storage tanks. Background Art

[0002] In the past two decades, fires and explosions in liquid and gas storage tank areas at home and abroad have occurred frequently, and the threats to life and economic losses caused by each incident are staggering. Explosions in oil, gas storage tanks and hazardous chemical storage tanks are fatal, and a single explosion is very likely to cause a large area of ​​liquid and gas storage tanks to be ignited and detonated.

[0003] In modern wars in recent years, oil and gas energy storage facilities have become one of the main targets of battlefield attacks. The combustion and explosion of oil and gas energy storage tanks will cause huge casualties and a large amount of economic losses, seriously threatening war logistics support. In my country's early oil and gas energy storage projects, a large number of ground vertical tanks were used. In the southeast coast, oil depots, refineries, and natural gas storage tank areas are densely distributed and easily attacked. Moreover, the liquid and gas storage tanks themselves are fragile. The outer shell is only a layer of steel, which can be easily penetrated by ordinary ammunition. The defense on the top is even weaker. Facing drone micro-missile bombing, it is powerless. In addition to oil and gas energy storage facilities, chemical storage tank areas should also be included in the protection targets. Some chemicals are also flammable and explosive, and even produce toxic gases after combustion and explosion, which seriously threatens people's lives and property. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a flame retardant and explosion resistant integrated sandwich protection device for protecting ground vertical storage tanks.

[0005] The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank of the present invention comprises a top gradient foam aluminum sandwich module, a side surrounding gradient foam aluminum sandwich module, a top foam aluminum corrugated sandwich panel, a side surrounding foam aluminum corrugated sandwich panel, a top and side surrounding sandwich panel connecting reinforcing ribs, an upper steel support frame, a flexible flame retardant net, a lower "I" steel support frame and a connection seat between the storage tank and the protection structure;

[0006] The top gradient foam aluminum sandwich module is composed of a first back plate, a first gradient foam core layer, a first panel and a first polyurea spray layer; the first back plate has threaded holes on four sides, a first gradient foam core layer is arranged between the first back plate and the first panel, the first gradient foam core layer is a three-layer foam aluminum structure, and the density gradient of the three layers of foam aluminum increases from top to bottom, and polyurea is sprayed on the surface of the first panel to form a first polyurea spray layer;

[0007] The side wall gradient foam aluminum sandwich module is composed of a second back plate, a second gradient foam core layer, a second panel and a second polyurea spray layer; a second gradient foam core layer is arranged between the second back plate and the second panel, the second gradient foam core layer is a three-layer foam aluminum structure, and the density gradient of the three layers of foam aluminum increases from top to bottom, and polyurea is sprayed on the surface of the second panel to form a second polyurea spray layer;

[0008] The top foam aluminum corrugated sandwich panel is composed of a third back plate, a third corrugated plate, a third foam aluminum filling and a third face plate; a third corrugated plate is arranged between the third back plate and the third face plate, and the foam aluminum filling is filled to the enclosed area of ​​the third corrugated plate, the third back plate and the third face plate;

[0009] The side surrounding foam aluminum corrugated sandwich panel is composed of a fourth back plate, a fourth corrugated plate, a fourth foam aluminum filling and a fourth face plate; a fourth corrugated plate is arranged between the fourth back plate and the fourth face plate, and the fourth foam aluminum filling is filled to the enclosed area of ​​the fourth corrugated plate, the fourth back plate and the fourth face plate;

[0010] The layer steel support frame is composed of a support frame, a square frame and a circular ring interface; the bottom of the support frame is fixedly connected to the upper surface of the square frame; the support frame is fitted with the fourth back plate and fixedly connected; a plurality of circular ring interfaces are provided on the inner side of the square frame;

[0011] The flexible flame retardant net is composed of an aluminum silicate fire-resistant flame retardant blanket and a plurality of steel rings; the plurality of steel rings are evenly distributed on the four sides of the aluminum silicate fire-resistant flame retardant blanket; the steel rings are connected to the ring-shaped interface;

[0012] The lower "I" steel support frame is composed of an "I" steel beam support, a triangular steel beam support and a sheet steel connection interface; the upper end of the "I" steel beam support is welded to the square frame; the lower end is welded to the triangular steel beam support, and the end of the triangular steel beam support is welded with a sheet steel connection interface, and the sheet steel connection interface is connected to the storage tank and protective structure connection seat welded on the tank body;

[0013] The first back plate, the second back plate, the third panel and the fourth panel are all provided with threaded holes around them; the first back plate is fitted with the third panel, and the threaded holes correspond one to one, and the top gradient foam aluminum sandwich module is connected to the top foam aluminum corrugated sandwich panel by screws; the second back plate is fitted with the fourth panel, and the threaded holes correspond one to one, and the side surrounding gradient foam aluminum sandwich module is connected to the side surrounding foam aluminum corrugated sandwich panel by screws;

[0014] Through holes are provided on the reinforcing ribs connecting the top and the side sandwich panels;

[0015] The third back panel, the top and side panel sandwich panels connecting the reinforcing ribs, and the opening positions on the support frame correspond one to one; the fourth back panel, the top and side panel sandwich panels connecting the reinforcing ribs, and the upper steel support frame have one to one correspondence; the third back panel, the fourth back panel, the top and side panel sandwich panels connecting the reinforcing ribs and the upper steel support frame are connected by screws.

[0016] Furthermore, the thickness of the first back plate and the second back plate is not less than 5 mm.

[0017] Furthermore, a plurality of holes are opened around the first back plate, and when the first back plate is connected to the third panel, bolts are inserted into the plurality of holes at intervals.

[0018] Furthermore, the panel and the second panel are both steel plates.

[0019] Furthermore, the support frame is welded by four groups of trapezoidal frames in the horizontal and vertical directions, and a plurality of sheet steel connection interfaces are installed on the support frame. Each interface is provided with a plurality of through holes for connection and fixation with the threaded holes of the fourth back plate.

[0020] Furthermore, the triangular steel beam support is an "I"-shaped steel beam, with two parallel steel reinforcing ribs arranged in the middle.

[0021] Furthermore, the first gradient foam core layer and the second gradient foam core layer are both resistant to high temperatures of 1100 degrees or above.

[0022] Furthermore, a gap is left at the junction of the side foam aluminum corrugated sandwich panel and the top foam aluminum corrugated sandwich panel, and the side foam aluminum corrugated sandwich panel is inclined.

[0023] Furthermore, a steel reinforcement rib is arranged in the middle of the reinforcement ribs connecting the top and side sandwich panels.

[0024] Furthermore, the triangular steel beam support adopts an "I"-shaped steel beam, and two parallel steel reinforcing ribs are arranged in the middle.

[0025] The present invention has the following beneficial effects:

[0026] The present invention is an important infrastructure for people's livelihood security, power supply, and military wartime logistics support, including energy sources such as oil, hydrogen, natural gas, and some liquid and gas chemicals. The present invention takes the actual situation that ground oil and gas energy storage tanks are repeatedly hit in modern warfare as the engineering background, and designs a flame retardant / explosion-resistant integrated sandwich protection structure that meets the high-temperature use environment of 1100 degrees Celsius and can be used to resist explosion impact, impact fragments, and high-temperature debris falling. It can not only effectively protect against external attacks, but also prevent the splashing of high-energy fragments generated by the explosion and tearing of the top of the storage tank body.

[0027] The storage tank of the present invention is composed of nine parts, such as Figure 1 As shown, they are the top gradient foam aluminum sandwich module, the side gradient foam aluminum sandwich module, the top foam aluminum corrugated sandwich panel, the side foam aluminum corrugated sandwich panel, the top and side sandwich panels connecting the reinforcing ribs, the upper steel support frame, the flexible flame retardant net, the lower "I" type support beam, and the connection seat between the storage tank and the protective structure. The three-dimensional structure diagram is as follows Figure 2 As shown, in actual application, it is connected to the ground vertical liquid and gas storage tank as shown in Figure 3 shown.

[0028] The core concepts of the present invention mainly revolve around: light weight, low cost, explosion resistance / impact resistance / flame retardant integration. The top layer of the present invention adopts a gradient foam aluminum sandwich modular protective structure, which is light in weight and low in cost. The foam structure with increasing density gradient can reduce the transmission of structural explosion impulse and has a good energy absorption mechanism. When the protective structure is impacted, the upper protective structure is destroyed first. The modular structural design is not only easy to install, but also easy to replace, which reduces the cost of protection. The lower layer of this design is a foam aluminum corrugated sandwich panel, which is used to resist residual explosion impact and fragment impact generated by warhead explosion. Compared with traditional metal plates, it has better explosion resistance and impact resistance at the same surface density. The corrugated structure is easy to prepare and has low cost. A flexible flame retardant net is set between the explosion and impact resistance structure and the tank body to intercept high-temperature fragments generated by the explosion and impact, and prevent high-temperature fragments from contacting the tank body.

[0029] The invention has the advantages of light weight, low cost, simple process, modular replaceability and other engineering applications. It is also a multifunctional protective structure that is resistant to explosion, fragment impact and flame retardant, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a flame retardant and explosion resistant integrated sandwich protection device for protecting ground vertical storage tanks;

[0031] Figure 2 A three-dimensional diagram of a flame-retardant and explosion-resistant integrated sandwich protection device for protecting ground vertical storage tanks. The left diagram includes a flexible flame-retardant net, while the right diagram does not include a flexible flame-retardant net.

[0032] Figure 3 It is a three-dimensional diagram and a cross-sectional diagram of a flame-retardant and explosion-resistant integrated sandwich protection device for protecting a ground vertical storage tank, which is connected to a ground vertical liquid or gas storage tank during actual application;

[0033] Figure 4 It is the top gradient aluminum foam sandwich module, including the installation top view and the three-dimensional view of a single module;

[0034] Figure 5It is a side wall gradient foam aluminum sandwich module, including the installation top view and the three-dimensional view of a single module;

[0035] Figure 6 The top foam aluminum corrugated sandwich panel includes three-dimensional images of depression and elevation angles;

[0036] Figure 7 This is a three-dimensional diagram of the half structure of the side foam aluminum corrugated sandwich panel;

[0037] Figure 8 A three-dimensional diagram of the structure of one quarter of the reinforcement ribs connecting the top and side sandwich panels;

[0038] Fig. 9 This is a three-dimensional diagram of the upper steel support frame;

[0039] Fig.10 This is a three-dimensional diagram of a quarter structure of the flexible flame retardant mesh;

[0040] Fig.11 This is a three-dimensional diagram of the structure of one quarter of the lower "I" steel support frame;

[0041] Fig.12 This is a three-dimensional diagram of the structure of one quarter of the connection between the tank and the protective structure. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention more clearly understood, the spirit of the contents disclosed by the present invention will be described in detail below. After understanding the embodiments of the contents of the present invention, any technician in the relevant technical field can change and modify them according to the techniques taught by the contents of the present invention without departing from the spirit and scope of the contents of the present invention.

[0043] The exemplary embodiments of the present invention and the description thereof are used to explain the present invention but are not intended to limit the present invention.

[0044] Example 1

[0045] The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank in this embodiment is composed of nine parts, such as Figure 1 As shown, they are top gradient foam aluminum sandwich module 1, side gradient foam aluminum sandwich module 2, top foam aluminum corrugated sandwich panel 3, side foam aluminum corrugated sandwich panel 4, top and side sandwich panel connecting reinforcing rib 5, upper steel support frame 6, flexible flame retardant net 7, lower "I" steel support frame 8, tank and protective structure connection seat 9. The three-dimensional structure is as follows Figure 2 As shown, in actual application, it is connected to the ground vertical liquid and gas storage tank as shown in Figure 3 shown.

[0046] The top gradient foam aluminum sandwich module 1 is a foam aluminum sandwich structure with increasing density gradient, such as Figure 4As shown, it includes four parts: a first back plate 1-1, a first gradient foam core layer 1-2, a first panel 1-3 and a first polyurea spray layer 1-4. The thickness of the first back plate 1-1 should not be less than 5 mm to avoid tearing damage at the connection caused by explosion impact. The holes are opened all around and used to connect the top gradient foam aluminum sandwich module 1 with the top foam aluminum corrugated sandwich panel 3. The two are connected by screws. There are 36 holes in total and 9 holes on one side. They should be used at intervals when connected. The unused holes are spare holes to facilitate the replacement and installation of the modules after being damaged. The first gradient foam core layer 1-2 is a three-layer foam aluminum structure. The foam aluminum material can meet the high temperature use environment of 1100 degrees and above. The three layers of foam aluminum have different densities and show a density gradient increasing trend from top to bottom. Compared with other arrangements, it can improve the energy absorption capacity of the structure. Its weaker upper layer of foam aluminum design can reduce the explosion impulse transmission of the structure. The first panel 1-3 is a steel plate, which is thicker than the back plate to prevent the explosion from directly causing a breach. Polyurea is sprayed on the upper surface of the first panel 1-3 to form a first polyurea spray layer 1-4, which improves the structural strength and enhances the resistance to the impact caused by fragments or bullets.

[0047] The side gradient foam aluminum sandwich module 2 is a foam aluminum sandwich structure with increasing density gradient, such as Figure 5 As shown, it includes four parts: a second back plate 2-1, a second gradient foam core layer 2-2, a second panel 2-3 and a second polyurea spray layer 2-4. The thickness of the second back plate 2-1 should not be less than 5 mm to avoid tearing damage at the connection caused by explosion impact. The slope design of one side of the gradient foam aluminum sandwich module 1 close to the top and the slope design of the junction of the side gradient foam aluminum sandwich modules 2 in different directions can achieve all-round protection, and gaps are left at the junction to avoid installation and disassembly difficulties caused by stress concentration or damage and deformation. The right-angled edges are opened for connecting the side gradient foam aluminum sandwich modules 2 with the side foam aluminum corrugated sandwich panels 4, and the two are connected by screws. When connecting, the screw holes should be used at intervals, and the unused holes are spare holes to facilitate the replacement and installation of the modules after damage. The second gradient foam core layer 2-2 is a three-layer foam aluminum structure. The foam aluminum material can meet the high temperature use environment of 1100 degrees and above. The three layers of foam aluminum have different densities, and the density gradient increases from top to bottom. Compared with other arrangements, it can improve the energy absorption capacity of the structure. Its weaker upper layer of foam aluminum design can reduce the explosion impulse transmission of the structure. The second panel 2-3 is a steel plate, which is thicker than the back plate to prevent direct ruptures caused by the explosion. Polyurea is sprayed on the upper surface of the second panel 2-3 to form a second polyurea spray layer 2-4, which improves the structural strength and improves resistance to the impact of fragments or bullets.

[0048] The top foam aluminum corrugated sandwich panel 3 is a corrugated sandwich structure filled with foam aluminum, such as Figure 6As shown, it is composed of four parts: the third back plate 3-1, the third corrugated plate 3-2, the third foam aluminum filling 3-3 and the third panel 3-4. The third panel 3-4 and the third back plate 3-1 are made of metal, with threaded holes on the surface. The opening position of the third panel 3-4 corresponds to the opening position of the top gradient foam aluminum sandwich module 1, and the opening position of the third back plate 3-1 corresponds to the opening position of the top and side sandwich panel connecting reinforcing ribs 5 and the upper steel support frame 6. The third corrugated plate 3-2 is welded to the third panel 3-4 and the third back plate 3-1. The corrugated plate can greatly improve the explosion resistance of the foam sandwich structure, and the process is simple, easy to process and low cost. The third foam aluminum filling 3-3 is used in the area enclosed by the corrugated structure to increase the structural strength and improve the structure's ability to resist explosion impact.

[0049] The side aluminum foam corrugated sandwich panel 4 is a corrugated sandwich structure filled with aluminum foam, such as Figure 7 As shown, it is composed of four parts: the fourth back plate 4-1, the fourth corrugated plate 4-2, the fourth foam aluminum filling 4-3 and the fourth panel 4-4. The slope design of one side of the foam aluminum corrugated sandwich panel 3 close to the top, and the slope design of the border of the side foam aluminum corrugated sandwich panels 4 in different directions, realize all-round protection, and leave gaps at the border to avoid installation and disassembly difficulties caused by stress concentration or damage and deformation. The fourth panel 4-4 and the fourth back plate 4-1 are made of metal, with threaded holes on the surface. The opening position of the fourth panel 4-4 corresponds to the opening position of the side gradient foam aluminum sandwich module 2, and the opening position of the back plate corresponds to the opening position of the top and side sandwich panel connecting reinforcing ribs 5 and upper steel support frame 6. The third corrugated plate 3-2 is welded to the fourth panel 4-4 and the fourth back plate 4-1, and the remaining positions are filled with the fourth foam aluminum filling 4-3.

[0050] The top and side sandwich panels are connected to the reinforcing rib 5, and the quarter structure is designed as follows Figure 8 As shown, holes are opened on the surface of the connecting component, and the top foam aluminum corrugated sandwich panel 3 and the side foam aluminum corrugated sandwich panel 4 are connected with 8 screws respectively, and a steel reinforcing rib is arranged in the middle.

[0051] The upper steel support frame 6 is an integrated steel support frame, such as Fig. 9 As shown, it is composed of three parts: a support frame 6-1, a square frame 6-2, and a circular interface 6-3. The support frame 6-1 is formed by welding four groups of trapezoidal frames in the horizontal and vertical directions, and is fitted with the back plate of the side foam aluminum corrugated sandwich panel 4. It is provided with 16 sheet steel connection interfaces, each of which is provided with 8 through holes for connection and fixing with the threaded holes of the back plate of the side foam aluminum corrugated sandwich panel 4. The square frame 6-2 is a relatively thick square steel beam, which is the main load-bearing component of the upper frame. A plurality of circular interfaces 6-3 are welded on its inner side for hoisting the flexible flame retardant net 7.

[0052] The flexible flame retardant net 7 is composed of two parts: an aluminum silicate fire-resistant flame retardant blanket 7-1 and a steel ring 7-2. Fig.10 As shown, combined with the high temperature use environment of 1100 degrees and above, the selected material is aluminum silicate refractory flame retardant blanket 7-1, which is prepared by mixing hard refractory clay powder with materials such as alumina, silicon powder, chromium oxide, silicon nitride, etc., and spinning with a spinning machine. The aluminum silicate refractory flame retardant blanket has good stability in high temperature use environment, strong tensile strength, and a long service life. A steel ring 7-2 is provided around it, which is used to connect with the annular interface 6-3 of the upper steel support frame, and the position corresponds to it one by one. In the actual engineering background, high-temperature fragments are also one of the main threats to liquid and gas storage tanks. At the same time, when the upper structure resists the impact of the explosion, high-temperature fragments will also splash. The hoisting flexible flame retardant net 7 can effectively block the high-temperature fragments. In addition, hoisting outside the protective structure makes the process simpler and convenient for replacing damaged flexible flame retardant nets.

[0053] The lower "I" steel support frame 8 is composed of an "I" steel beam support 8-1, a triangular steel beam support 8-2 and a sheet steel connection interface 8-3. Fig.11 As shown. The "I"-shaped steel beam bracket 8-1 is formed by welding an "I"-shaped steel beam at a variable angle, and the upper end is welded to the square frame 6-2. Three "I"-shaped steel beams are welded on each side of the square frame 6-2, and the lower end of the "I"-shaped steel beam is welded to the triangular steel beam bracket 8-2. The triangular steel beam bracket 8-2 also adopts an "I"-shaped steel beam, and two parallel steel reinforcing ribs are arranged in the middle. A sheet steel connection interface 8-3 is welded to each of the two ends of the triangular steel beam bracket 8-2, and a hole is opened on the surface for connection with the tank body. The overall design of the lower "I"-shaped support beam 8 adopts a large number of "I"-shaped steel beams to reduce the weight of the structure. Compared with the same quality, it has higher bending resistance, mature technology and stable structure.

[0054] The tank and the protective structure connection seat 9 have a structure such as Fig.12 As shown, it is used to connect the protective structure with the tank body of the liquid and gas storage tank. The surface of the protective structure is provided with a connection stopper, which is the same size as the sheet steel connection interface 8-3. The upper end of the stopper is a sloped surface, which is convenient for hard contact of the components during installation, and is convenient for position guidance and installation. There are 8 tank and protective structure connection seats 9, which are of the same height and are evenly arranged in a circular manner on the outer side of the tank body. They need to be pre-welded on the tank body.

[0055] The installation method of a flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank in this embodiment is as follows:

[0056] Step 1: Process the top foam aluminum corrugated sandwich panel 3, the side foam aluminum corrugated sandwich panel 4, and the top and side sandwich panel connection reinforcement ribs. The corrugated structure is fixed to the back panel by welding, and then filled with foam aluminum. Use the connection holes on the top and side sandwich panel connection reinforcement ribs 5 to align the threaded holes of the top foam aluminum corrugated sandwich panel back panel 3-1 and the side foam aluminum corrugated sandwich panel back panel 4-1, and screw them together;

[0057] Step 2: Process the upper steel support frame 6 to release the residual stress, install the assembled top foam aluminum corrugated sandwich panel 3 and the side foam aluminum corrugated sandwich panel 4 on the upper steel support frame 6, and use the sheet steel connection interface of the support frame 6-1 to fix the connection with screws;

[0058] Step 3: Process the top gradient foam aluminum sandwich module 1 and the side gradient foam aluminum sandwich module 2. The structure includes three layers of foam aluminum. The three layers of foam aluminum have different densities and show a density gradient increasing trend from top to bottom. They are connected with the top foam aluminum corrugated sandwich panel 3 and the side foam aluminum corrugated sandwich panel 4 by screws. When connecting, the screw holes should be used at intervals, and the unused holes are spare holes to facilitate the replacement and installation of the modules after they are damaged.

[0059] Step 4: Process the lower “I”-shaped support beam 8 and weld it to the square frame 6-2;

[0060] Step 5: Process the connection seat 9 between the storage tank and the protective structure, and complete the welding and fixing outside the tank body;

[0061] Step 6: Process the flexible flame retardant net 7, and connect the steel ring 7-2 with the ring-shaped interface 6-3 to complete the lifting of the flexible flame retardant net;

[0062] Step 7: Use a hook to connect the square frame 6-2, hoist the overall protective structure, and fix the sheet steel connection interface 8-3 and the tank and protective structure connection seat 9 with screws to complete the overall installation.

Claims

1. A flame retardant and explosion resistant integrated sandwich protection device for protecting ground vertical storage tanks, characterized in that It comprises a top gradient foam aluminum sandwich module (1), a side gradient foam aluminum sandwich module (2), a top foam aluminum corrugated sandwich panel (3), a side foam aluminum corrugated sandwich panel (4), a top and side sandwich panel connecting reinforcing ribs (5), an upper steel support frame (6), a flexible flame retardant net (7), a lower "I" steel support frame (8) and a tank and protective structure connection seat (9); The top gradient foam aluminum sandwich module (1) is composed of a first back plate (1-1), a first gradient foam core layer (1-2), a first panel (1-3) and a first polyurea spray layer (1-4); the first back plate (1-1) has threaded openings on four sides, a first gradient foam core layer (1-2) is arranged between the first back plate (1-1) and the first panel (1-3), the first gradient foam core layer (1-2) is a three-layer foam aluminum structure, and the density gradient of the three layers of foam aluminum increases from top to bottom, and the surface of the first panel (1-3) is sprayed with polyurea to form the first polyurea spray layer (1-4); The side wall gradient foam aluminum sandwich module (2) is composed of a second back plate (2-1), a second gradient foam core layer (2-2), a second panel (2-3) and a second polyurea spray layer (2-4); a second gradient foam core layer (2-2) is arranged between the second back plate (2-1) and the second panel (2-3); the second gradient foam core layer (2-2) is a three-layer foam aluminum structure, and the density gradient of the three layers of foam aluminum increases from top to bottom; polyurea is sprayed on the surface of the second panel (2-3) to form the second polyurea spray layer (2-4); The top foam aluminum corrugated sandwich panel (3) is composed of a third back panel (3-1), a third corrugated plate (3-2), a third foam aluminum filling (3-3) and a third panel (3-4); a third corrugated plate (3-2) is arranged between the third back panel (3-1) and the third panel (3-4), and the foam aluminum filling (3-3) is filled into the enclosed area of ​​the third corrugated plate (3-2), the third back panel (3-1) and the third panel (3-4); The side surrounding foam aluminum corrugated sandwich panel (4) is composed of a fourth back panel (4-1), a fourth corrugated plate (4-2), a fourth foam aluminum filling (4-3) and a fourth panel (4-4); a fourth corrugated plate (4-2) is arranged between the fourth back panel (4-1) and the fourth panel (4-4), and the fourth foam aluminum filling (4-3) is filled into the enclosed area of ​​the fourth corrugated plate (4-2), the fourth back panel (4-1) and the fourth panel (4-4); The layer steel support frame (6) is composed of a support frame (6-1), a square frame (6-2) and an annular interface (6-3); the bottom of the support frame (6-1) is fixedly connected to the upper surface of the square frame (6-2); the support frame (6-1) is fitted with the fourth back plate (4-1) and fixedly connected; a plurality of annular interfaces (6-3) are provided on the inner side of the square frame (6-2); The flexible flame retardant net (7) is composed of an aluminum silicate fire resistant flame retardant blanket (7-1) and a plurality of steel rings (7-2); the plurality of steel rings (7-2) are evenly distributed on the four sides of the aluminum silicate fire resistant flame retardant blanket (7-1); the steel rings (7-2) are connected to the annular interface (6-3); The lower "I"-shaped steel support frame (8) is composed of an "I"-shaped steel beam support (8-1), a triangular steel beam support (8-2) and a sheet steel connection interface (8-3); the upper end of the "I"-shaped steel beam support (8-1) is welded to the square frame (6-2); the lower end is welded to the triangular steel beam support (8-2), and the end of the triangular steel beam support (8-2) is welded with a sheet steel connection interface (8-3), and the sheet steel connection interface (8-3) is connected to the storage tank and protective structure connection seat (9) welded on the tank body; The first back plate (1-1), the second back plate (2-1), the third panel (3-4), and the fourth panel (4-4) are all provided with threaded holes on all sides; the first back plate (1-1) and the third panel (3-4) are fitted together, and the threaded holes correspond one to one, and the top gradient foam aluminum sandwich module (1) and the top foam aluminum corrugated sandwich panel (3) are connected by screws; the second back plate (2-1) and the fourth panel (4-4) are fitted together, and the threaded holes correspond one to one, and the side surrounding gradient foam aluminum sandwich module (2) and the side surrounding foam aluminum corrugated sandwich panel (4) are connected by screws; Through holes are provided on the reinforcing ribs (5) connecting the top and side sandwich panels; The positions of the openings on the third back plate (3-1), the top and side sandwich panels connecting the reinforcing ribs (5), and the support frame (6-1) correspond one to one, and the positions of the openings on the fourth back plate (4-1), the top and side sandwich panels connecting the reinforcing ribs (5), and the upper steel support frame (6) correspond one to one; the third back plate (3-1), the fourth back plate (4-1), the top and side sandwich panels connecting the reinforcing ribs (5) and the upper steel support frame (6) are connected by screws.

2. The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank according to claim 1, characterized in that The thickness of the first back plate (1-1) and the second back plate (2-1) are both not less than 5 mm.

3. The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank according to claim 1, characterized in that A plurality of holes are formed around the first back plate (1-1), and when the first back plate (1-1) is connected to the third panel (3-4), bolts are inserted into the plurality of holes at intervals.

4. The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank according to claim 1, characterized in that The panel (1-3) and the second panel (2-3) are both steel plates.

5. The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank according to claim 1, characterized in that The support frame (6-1) is welded by four groups of trapezoidal frames in the horizontal and vertical directions. A plurality of sheet steel connection interfaces are installed on the support frame (6-1). Each interface is provided with a plurality of through holes for connection and fixation with the threaded holes of the fourth back plate (4-1).

6. The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank according to claim 1, characterized in that The triangular steel beam support (8-2) is an "I" type steel beam, with two parallel steel reinforcing ribs arranged in the middle.

7. The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank according to claim 1, characterized in that The first gradient foam core layer (1-2) and the second gradient foam core layer (2-2) are both resistant to high temperatures of 1100 degrees or above.

8. The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank according to claim 1, characterized in that A gap is left at the junction of the side foam aluminum corrugated sandwich panel (4) and the top foam aluminum corrugated sandwich panel (3), and the side foam aluminum corrugated sandwich panel (4) is arranged tilted.

9. The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank according to claim 1, characterized in that A steel reinforcement rib is arranged in the middle of the reinforcement rib (5) connecting the top and the side sandwich panels.

10. The flame retardant and explosion resistant integrated sandwich protection device for protecting a ground vertical storage tank according to claim 1, characterized in that The triangular steel beam support (8-2) adopts an "I"-shaped steel beam, and two parallel-arranged steel reinforcing ribs are arranged in the middle.

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