Bulletproof and explosion-proof square cabin with high protection performance

Abstract

The utility model discloses a high protection performance's bulletproof blast shelter, including cabin body, cabin body is by square cabin big board and is spliced through angle piece, and square cabin big board is by steel skeleton, and the inner skin and the outer skin of cladding in the inside and outside of steel skeleton, and the energy absorption plate of setting in the inside of inner skin, and the heat insulating layer of setting between steel skeleton and inner skin, and the heat preservation material and the adhesive of filling between inner skin and outer skin are cured and formed through vacuum bag pressure technology, and the outer skin is bulletproof steel sheet, and the outer skin is welded with steel skeleton, and the inner skin is cemented with steel skeleton and energy absorption plate, and the angle piece includes inner angle piece and outer angle piece, and the inner angle piece is riveted with the inner skin of two adjacent square cabin big boards through rivet, and the outer angle piece is welded with the outer skin of two adjacent square cabin big boards. The utility model discloses square cabin structure stable, and the anti -explosion, the strong anti -impact ability can reach STANAG 4569 secondary protection standard.

Description

Technical Field

[0001] This utility model relates to the field of modular shelter technology, specifically to a bulletproof and explosion-proof modular shelter with high protective performance. Background Technology

[0002] As mobile command posts, electronic station platforms, or equipment maintenance stations, mobile shelters must withstand threats such as small arms, fragmentation, RPGs, and explosives. Existing bulletproof shelters typically use composite structures bonded and pressed together with adhesives, such as a multi-layered design of "steel frame + PE board + polyurethane foam + inner and outer skin." While PE boards possess ultra-high strength and impact absorption capacity, their temperature resistance is poor; their ballistic performance diminishes above 80°C and melts above 150°C, making them ineffective against high-velocity rifle armor-piercing rounds and explosives. Furthermore, the bonding strength between PE boards and polyurethane foam boards is low, resulting in poor stability and a tendency to delamination; this severely impacts the safety and protective performance of the shelter.

[0003] In addition, existing bulletproof shelters are generally not equipped with occupant restraint systems. In the event of an explosion shockwave, severe vehicle vibration, sudden stop / collision, etc., if the occupants are not effectively secured, they may be fatally injured due to inertia when they hit hard objects inside the shelter (such as seats, control consoles, and shelter walls). Summary of the Invention

[0004] To address the aforementioned problems, this utility model provides a bulletproof and explosion-proof container with high protective performance.

[0005] The technical solution adopted in this utility model is:

[0006] A high-protection bulletproof and explosion-proof container includes a container body, which is assembled from large container panels using corner fittings. Each large container panel consists of a steel frame, inner and outer skins covering the steel frame, an energy-absorbing plate located inside the inner skin, a heat insulation layer between the steel frame and the inner skin, and insulation material and adhesive filled between the inner and outer skins, cured using a vacuum bag pressing process. The outer skin is made of bulletproof steel plate and is welded to the steel frame. The inner skin is bonded to the steel frame and the energy-absorbing plate. The corner fittings include inner and outer corner fittings. The inner corner fittings are riveted to the inner skins of two adjacent large container panels, and the outer corner fittings are welded to the outer skins of two adjacent large container panels.

[0007] Furthermore, the cabin is equipped with an occupant restraint system, which includes a lightning protection seat fixed to an energy-absorbing plate on the bottom of the cabin, a multi-point seat belt installed on the lightning protection seat, and a lower limb protection device fixed to an energy-absorbing plate on the bottom of the cabin.

[0008] When a vehicle is subjected to an explosion, the occupant restraint system can effectively attenuate the high-frequency, high-acceleration explosion impact, reducing the damage to the occupants.

[0009] Furthermore, the lower limb protection device is an elastic pad. The elastic pad further reduces the impact of the explosion on the occupant.

[0010] Furthermore, it can be rectangular, cubic, spherical, or prismatic.

[0011] Furthermore, the cabin is rectangular in shape and is composed of six large cabin panels joined together at right angles using corner fittings. The top and bottom panels of the cabin have the same structure, with their steel frames welded together on all four sides using double rows of steel profiles. The four side panels of the cabin have the same structure, with their steel frames welded together on all four sides using single rows of steel profiles. During assembly, the double rows of steel profiles on the outer frame of the steel frames of the top and bottom panels are welded together with the single rows of steel profiles on the outer frame of the steel frames of the side panels to form the corners of the cabin. The outer skins of adjacent cabin panels are welded together and cover the corners of the cabin.

[0012] The cabin is assembled from six standardized large plates (top, bottom, and four sides) using corner fittings and welding, achieving modular and standardized production, facilitating factory prefabrication and rapid on-site assembly. The top and bottom surfaces, serving as load-bearing surfaces, utilize double rows of welded steel to form a frame, significantly enhancing the cabin's vertical load-bearing capacity (compressive and bending resistance) and overall rigidity, enabling it to better withstand external loads (such as those caused by stacking, transportation vibrations, and stress from uneven ground). The sides primarily bear lateral forces; the use of single rows of steel satisfies strength requirements while saving materials and controlling weight and cost. The double rows of steel on the top / bottom surfaces are welded to the single rows of steel on the sides at the corners, forming robust corner joints that enhance the overall structural integrity and torsional resistance of the cabin, improving its stability during transportation and stacking.

[0013] Furthermore, the inner skin is made of aluminum plate or carbon fiber plate, and the insulation material is polyethylene foam board.

[0014] The inner skin, made of aluminum or carbon fiber, allows for lightweight design and improved corrosion resistance. Polyethylene foam boards have low thermal conductivity, good sound absorption, and are lightweight, making them easy to install and process into different shapes. They can be tightly fitted to the inner wall of the cabin, filling the space between the frame and the skin, thus improving the overall thermal and sound insulation performance of the structure.

[0015] Furthermore, the cavity of the steel frame is filled with polyethylene foam to improve the energy absorption and bulletproof / explosion-proof performance of the steel frame.

[0016] Furthermore, the energy-absorbing plate consists of a PE plate and aluminum plates covering the outer side and four end faces of the PE plate. The inner side of the PE plate is bonded to the inner skin with adhesive.

[0017] PE sheets have ultra-high strength and impact resistance, and the aluminum cladding on the surface improves their high temperature resistance and enhances the bulletproof and explosion-proof performance of the cabin.

[0018] Furthermore, the inner corner pieces are made of aluminum or carbon fiber plates, while the outer corner pieces are made of bulletproof steel plates.

[0019] The double-layered corner fittings enhance the overall structural rigidity and connection strength of the cabin, especially when subjected to explosive impacts and lateral forces.

[0020] Furthermore, the cabin is equipped with safety doors, ventilation windows, and signal transfer ports; the outer skin of the safety doors, ventilation windows, and signal transfer ports is made of bulletproof steel plates, improving the overall bulletproof and explosion-proof performance of the cabin.

[0021] Furthermore, the cabin is equipped with an occupant restraint system, which includes a lightning protection seat fixed to an energy-absorbing plate on the bottom of the cabin, a multi-point seat belt installed on the lightning protection seat, and a lower limb protection device fixed to an energy-absorbing plate on the bottom of the cabin.

[0022] When a vehicle is subjected to an explosion, the occupant restraint system can effectively attenuate the high-frequency, high-acceleration explosion impact, reducing the damage to the occupants.

[0023] Furthermore, the lower limb protection device is an elastic pad. The elastic pad further reduces the impact of the explosion on the occupant.

[0024] The beneficial effects of this utility model are as follows: This utility model adopts a composite structure of steel frame, outer skin, inner skin, insulation material, heat insulation layer, and energy-absorbing plate. The steel frame provides the main strength, ensuring the overall structural rigidity and deformation resistance. The outer skin uses bulletproof steel plate, enabling the shelter to withstand attacks from bullets, shrapnel, and explosive impacts, making it suitable for high-risk or special environments such as military, security, emergency command, and field operations. The bulletproof steel plate itself has high strength and hardness, and together with the internal steel frame, it further enhances the shelter's impact resistance and deformation resistance, strengthening the overall structural durability and safety. The internal energy-absorbing plate absorbs and disperses energy when the shelter is impacted, reducing damage to personnel and equipment inside. The heat insulation layer effectively blocks the transmission of external high temperatures (such as fire and solar radiation) to the interior, protecting internal equipment and personnel. The insulation material provides cushioning while also contributing to weight reduction and heat insulation. This utility model achieves the protection concept of "hard resistance + soft absorption" through multi-layer material combination, improving blast and impact resistance.

[0025] 2. This utility model uses a vacuum bag pressing process to cure the large chamber panel, so that the materials of each layer are tightly bonded, without bubbles, and with high strength, thereby improving the overall structural integrity and durability.

[0026] 3. The use of large-panel splicing facilitates production, transportation, assembly and maintenance; the materials and structural components of each layer can be designed and manufactured in a standardized manner, which is conducive to mass production and subsequent upgrades and modifications.

[0027] 4. The bulletproof and explosion-proof shelter of this application can meet the STANAG 4569 Level 2 protection standard. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the exterior of the bulletproof and explosion-proof container used in this application.

[0029] Figure 2 This is a structural diagram of the large panel on the roof of the makeshift shelter.

[0030] Figure 3 This is a structural diagram of the large side panel of the modular shelter.

[0031] Figure 4 This is a structural diagram of the corner section of the modular shelter.

[0032] Figure 5 This is a structural diagram of the energy-absorbing plate.

[0033] Figure 6 This is a structural diagram of the occupant restraint system. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and preferred embodiments.

[0035] See Figures 1-6 A high-protection bulletproof and explosion-proof container includes a container body. In this embodiment, the container body is formed by splicing six large container panels at right angles using corner pieces 14. The six large container panels include four side panels consisting of a front panel 11, a rear panel, a left side panel 13, and a right side panel, a top panel 12, and a bottom panel. The left side panel 13 is provided with a safety door 15, a ventilation window 16, and a signal transfer port 17.

[0036] See Figure 2 The four side panels have the same structure, each including a steel frame 111 welded from steel profiles, an inner skin 112 and an outer skin 113 covering the inside and outside of the steel frame, an energy-absorbing plate 114 disposed on the inner side of the inner skin, a heat insulation layer 115 disposed between the steel frame and the inner skin, and a polyethylene foam board 116 filled between the inner skin 112 and the outer skin 113.

[0037] The steel frame 111 is welded using high-strength square steel (yield strength ≥ 340 MPa). In this embodiment, the steel frame 111 uses 30×30 mm square steel, which is welded into a grid-shaped frame structure. The external dimensions of the grid-shaped frame are smaller than those of the outer skin, that is, the length and width of the steel frame 111 are smaller than the length and width of the outer skin 113. The four corners of the steel frame 111 are provided with right-angle notches. Polyethylene foam 117 is filled inside the square steel to improve the energy absorption, bulletproof and explosion-proof effect of the steel frame 111.

[0038] The outer skin 113 is made of 12-16mm thick bulletproof steel plate, and the four corners of the outer skin 113 are provided with right-angle notches corresponding to the steel frame.

[0039] The inner skin 112 is made of 1.0-1.4mm thick aluminum alloy plate, and the outer dimensions of the inner skin 112 are smaller than the outer dimensions of the steel frame 111.

[0040] The insulation layer 115 is made of PVC board with a thickness of 8-12mm. PVC board has flame-retardant and self-extinguishing properties as an insulation material. The width of the PVC board inside the grid frame is equal to the width of the square steel. The width of the PVC board on the edge of the grid frame is about half the width of the square steel and is pasted on the inside of the square steel. Its outer end face is flush with the outer end face of the inner skin 112.

[0041] See Figure 5 The energy-absorbing panel 114 consists of a PE sheet 1141 with a thickness of 8-12 mm and an aluminum sheet 1142 with a thickness of 1.0-1.4 mm covering the outer side and four end faces of the PE sheet. The aluminum sheet 1142 is bonded to the PE sheet 1141 with adhesive. The external dimensions of the energy-absorbing panel 114 are the same as those of the inner skin 112. The outer side of the PE sheet 1141 is bonded to the inner skin 112 with adhesive, and the outer surface of the aluminum sheet 1142 forms the inner surface of the cabin. The PE sheet 1141 has ultra-high strength and impact resistance, and its surface is covered with aluminum sheet 1142, which improves its high temperature resistance.

[0042] When making the four large side panels

[0043] (1) After the outer skin 113 is spot welded to the welded steel frame 111, intermittent welding is used. After the overall welding is completed, it is shaped and corrected. The surface after welding is sandblasted and coated with zinc primer to improve corrosion resistance. (2) The PVC board is cut to a suitable size and bonded to the inside of the steel frame 111 with adhesive to form a heat insulation layer 115.

[0044] (3) The polyethylene foam board 116 is processed into a suitable size by a cold wire saw, and after applying adhesive to both sides, it is filled into the frame of the steel frame 111. The thickness of the polyethylene foam board 116 is equal to the thickness of the steel frame 111 plus the thickness of the insulation layer 115.

[0045] Polyethylene foam was selected as the insulation material because it is lightweight, high-strength, has low thermal conductivity, good chemical stability, and is easy to process. In addition, polyethylene foam not only provides thermal insulation, but also acts as an energy buffer when subjected to bullet impacts and explosions, giving it superior bulletproof and explosion-proof performance compared to polyurethane foam.

[0046] (4) Cover the outer surface of the insulation layer 115 and the polyethylene foam board 116 with the inner skin 112, and then bond the energy-absorbing plate 114 to the outer surface of the inner skin 112 with an adhesive.

[0047] (5) Finally, the assembled modular panel is placed in a vacuum bag and vacuum pressure is applied using a typical room temperature vacuum bag pressing process. The time is set according to the curing parameters of the panel, and the real-time vacuum degree is maintained at >96 kPa. After the adhesive is completely cured, the modular side panel is formed.

[0048] See Figure 3 The top panel 12 and the bottom panel have the same structure, both including a steel frame 121 welded from steel profiles, an inner skin 122 and an outer skin 123 covering the inner and outer sides of the steel frame, an energy-absorbing plate 124 disposed inside the inner skin 122, a heat insulation layer 125 disposed between the steel frame 121 and the inner skin 122, and a polyethylene foam board 126 filled between the inner skin 122 and the outer skin 123.

[0049] The structure and molding method of the top panel 12 and the bottom panel are basically the same as those of the side panels. The only difference is that the total thickness of the top panel 12 and the bottom panel is about 80-90% of that of the side panels. This is because, under normal circumstances, the perimeter of the container is at higher risk of damage than the top and bottom surfaces. In conjunction with the overall weight reduction design, the thickness of the top panel and the bottom panel is less than that of the side panels.

[0050] Furthermore, the structural dimensions of the steel frame 121 for the top and bottom large panels differ from those of the steel frame 111 for the side large panels. For example, in this embodiment, the steel frame 121 uses 20×30 mm square steel, placed horizontally. The outer frame of the steel frame 121 is formed by welding two rows of steel sections, and thermal insulation material is bonded only to about half of the inner row of steel sections. The outer row of steel sections has a smooth surface, and the external dimensions of the steel frame 121 are the same as those of the outer skin 123.

[0051] See Figure 4During the assembly of the modular shelter, taking the connection between the top panel 12 and the front panel 11 as an example, the outer row of steel profiles 121 and the outer skin 123 of the top panel 12's steel frame 121 are precisely inserted into the right-angle notch of the steel frame 111 of the side panel 11. The side of the 20×30 mm square steel is fitted with the outer skin 113, and the front is fitted with the surface of the 30×30 mm square steel. The end face of the outer skin 123 is fitted with the inner side of the outer skin 113, and the end face of the inner skin 124 is fitted with the inner side of the inner skin 114. After the double rows of 20×30 mm and 30×30 mm square steel are welded, they form the corners of the shelter. The outer skin 123 is welded to the outer skin 113 through a bevel weld, covering the outside of the corners of the steel structure. The corners of the shelter are supported by steel profiles and covered with bulletproof steel plates, which greatly increases its structural stability and improves the bulletproof and explosion-proof performance of the shelter.

[0052] The corner fitting 14 includes an inner corner fitting 142 and an outer corner fitting 141. The inner corner fitting 142 is welded from aluminum profiles, and the outer corner fitting 141 is welded from explosion-proof steel plate. The inner corner fitting 142 is riveted to the inner skin of two adjacent bulkhead panels, and the outer corner fitting 141 is welded to the outer skin of two adjacent bulkhead panels. The corner fitting 14 serves to strengthen the overall connection performance of the bulkhead and seal the corners.

[0053] The assembly process of the modular hospital is as follows:

[0054] a) The assembled large plates are then symmetrically positioned and welded in segments;

[0055] b) Fully weld the explosion-proof steel plates of each major plate and the joints with the outer corner piece 141. When welding the outer corner piece, it is permissible to insert a shim plate to make the corner piece horizontal and vertical before full welding. There should be no skewing. After welding, grind it smooth and flat.

[0056] c) When welding vertical seams, use two welding machines simultaneously to weld opposite each other, and adopt a vertical downward welding method. The welding sequence is: front right and rear right vertical seams → front left and rear left vertical seams → front upper and rear lower horizontal seams → front lower and rear upper horizontal seams → right upper and left lower horizontal seams → right lower and left upper horizontal seams. Welding deformation should be minimized as much as possible during welding.

[0057] d) Grind all weld seams smooth;

[0058] e) Install interior corner brackets 142 at the interior corners of the container;

[0059] f) Install safety doors 15, ventilation windows 16, and signal transfer ports 17, etc.

[0060] The outer skin of the security door 15, ventilation window 16, and signal transfer port 17 are all made of 12-16mm thick bulletproof steel plate. The manufacturing methods of the security door 15, ventilation window 16, and signal transfer port 17 are existing technologies.

[0061] In another embodiment of this utility model, an occupant restraint system is also provided inside the cabin, see reference. Figure 6 The occupant restraint system includes a lightning-protected seat 21, a multi-point seat belt 22, and a lower limb protection device 23.

[0062] Both the surge protector seat 21 and the multi-point safety harness 22 are existing technologies, such as the FDA011 model surge protector seat. The surge protector seat 21 is fixed to the bottom of the container panel with screws, and the multi-point safety harness 22 is fixed to the surge protector seat 21. The lower limb protection device 23 is an elastic pad made of XPE sheet, which is bonded to the energy-absorbing layer 124 of the bottom panel with adhesive. The XPE sheet is made primarily of low-density polyethylene (LDPE). Low-density polyethylene has good flexibility, chemical stability, and processing performance.

[0063] When a mobile medical unit is traveling on the road, the main threats from explosive shocks come from landmines, roadside bombs, and improvised explosive devices (IEDs). When the vehicle is subjected to an explosive shock, the occupant restraint system can effectively attenuate the high-frequency, high-acceleration explosive shock, reducing the damage to the occupants.

[0064] In other embodiments, the cabin may also be composed of several polygonal modular panels, such as triangular or pentagonal modular panels, spliced ​​together. The cabin shape may be spherical or prismatic. The structure and forming method of each polygonal modular panel may be the same as the side panels or top and bottom panels in the above embodiments. During splicing, the steel frames of adjacent modular panels are welded diagonally to form corners supported by structural steel and covered with an outer skin.

[0065] The assembly and welding process of the spherical or prismatic container is the same as that of the above embodiments, and the container has the same protective effect as the above embodiments.

[0066] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications are also within the protection scope of the present utility model.

Claims

1. A high-protection performance bulletproof and blastproof square cabin comprising a cabin body, characterized in that, The hull is assembled from modular panels using corner fittings. Each modular panel consists of a steel frame, inner and outer skins covering the steel frame, energy-absorbing panels inside the inner skins, a heat insulation layer between the steel frame and the inner skins, and insulation material and adhesives filling the space between the inner and outer skins, all cured using a vacuum bag pressing process. The outer skin is made of bulletproof steel plate and is welded to the steel frame. The inner skin is bonded to the steel frame and the energy-absorbing panels. The corner fittings include inner and outer corner fittings. The inner corner fittings are riveted to the inner skins of two adjacent modular panels, and the outer corner fittings are welded to the outer skins of two adjacent modular panels.

2. The blast and ballistic resistant shelter of claim 1, wherein, The shelter is equipped with an occupant restraint system, which includes lightning protection seats fixed to the energy-absorbing plate on the bottom of the shelter, multi-point safety belts installed on the lightning protection seats, and lower limb protection devices fixed to the energy-absorbing plate on the bottom of the shelter.

3. The blast and ballistic resistant shelter of claim 2, wherein, The lower limb protection device is an elastic pad.

4. The blast and ballistic resistant shelter of claim 1, wherein, The shape of the cabin can be rectangular, cube, spherical or prism.

5. The blast and ballistic resistant shelter of claim 4, wherein, The cabin is rectangular in shape and is composed of six large cabin panels joined together at right angles using corner fittings. The top and bottom panels of the cabin have the same structure, with their steel frames welded together on all four sides using double rows of steel profiles. The four side panels of the cabin have the same structure, with their steel frames welded together on all four sides using single rows of steel profiles. During assembly, the double rows of steel profiles on the outer frame of the top and bottom panels are welded together with the single rows of steel profiles on the outer frame of the side panels to form the corners of the cabin. The outer skins of adjacent cabin panels are welded together and cover the corners of the cabin.

6. The blast and ballistic resistant shelter of claim 1, wherein, The inner skin is made of aluminum plate or carbon fiber plate, and the insulation material is polyethylene foam board.

7. The blast and ballistic resistant shelter of claim 1, wherein, The cavity of the steel frame is filled with polyethylene foam.

8. The blast and ballistic resistant shelter of claim 1, wherein, The energy-absorbing plate consists of a PE plate and aluminum plates covering the outer side and four end faces of the PE plate. The inner side of the PE plate is bonded to the inner skin with adhesive.

9. The blast and ballistic resistant shelter of claim 1, wherein, The inner corner pieces are made of aluminum or carbon fiber plates, while the outer corner pieces are made of bulletproof steel plates.

10. The blast and ballistic resistant shelter of claim 1, wherein, The cabin is also equipped with safety doors, ventilation windows, and signal transfer ports; the outer skin of the safety doors, ventilation windows, and signal transfer ports is made of bulletproof steel plates.

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