Shielded modular housing

Abstract

This utility model provides a shielded container, comprising multiple bulkhead panels, which are spliced ​​together to form a box-like structure. Each bulkhead panel includes a top panel, a bottom panel, side panels, and inclined plates connecting the top and side panels. The inclined plates include a first inclined surface and a second inclined surface connected in sequence. At least one bulkhead panel, from the outside to the inside, includes an outer skin, a wave-transmitting layer, a wave-absorbing layer, a reflective layer, a first insulation layer, a bulletproof layer, a second insulation layer, a shielding layer, and an inner skin. The shielding layer is made of galvanized steel sheet. An outer edge and an inner edge are provided at the joint between adjacent bulkhead panels. The outer edge and the inner edge are riveted and fixed to the adjacent bulkhead panels. Conductive gaskets are provided between the overlapping surfaces of the outer edge / inner edge and the bulkhead panel, and conductive shielding tape is attached to the riveted parts of the outer edge / inner edge and the bulkhead panel. The corners of the container are equipped with corner fittings, which are connected and fixed to the adjacent bulkhead panels by bolts. The connection between the corner fittings and the bulkhead panels is covered with conductive shielding tape.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic shielding technology, and in particular to a shielded container. Background Technology

[0002] A modular shelter is a transportable container-type workspace with a certain level of protection, used to provide a working environment for personnel and electronic equipment. It is widely used in fields such as communications, radar, and command and control. As the electromagnetic environment becomes increasingly complex, modular shelters often need to shield against electromagnetic interference while also meeting multiple requirements such as stealth from external reconnaissance, protection against external attacks, and maintaining internal temperature. To this end, multiple functional layers such as shielding, wave absorption, bulletproofing, and thermal insulation are integrated into the bulkhead panels.

[0003] To facilitate transportation, assembly, maintenance, and expansion, modular shelters are typically constructed by splicing together multiple bulkhead panels to form a box-like structure. The seams between adjacent bulkhead panels are secured with edge-sealing riveting and corner fittings. The shielding layers within each bulkhead panel must be interconnected between adjacent panels to form a closed shielding structure that surrounds the internal space, thereby shielding against electromagnetic interference and preventing electromagnetic signal leakage within the shelter.

[0004] However, in modular shelters constructed using multiple bulkhead panels, the seams between adjacent panels are the weakest point in the overall shielding structure. On one hand, it's difficult to establish a continuous and stable electrical connection between adjacent shielding layers at the seams, easily leading to shielding discontinuities. On the other hand, assembly gaps and poor contact exist at the overlap surfaces of the edging and the bulkhead panels, as well as at the connections between the corner fittings and the bulkhead panels, easily causing electromagnetic leakage at the seams and connections. These weaknesses make it difficult to achieve continuous and reliable electromagnetic shielding throughout the entire modular shelter when integrating multiple functional layers. Utility Model Content

[0005] The purpose of this utility model is to provide a shielded container, comprising multiple bulkhead panels, which are spliced ​​together to form a box-like structure. Each bulkhead panel includes a top panel, a bottom panel, side panels, and an inclined plate connecting the top and side panels. At least one bulkhead panel includes an outer skin, a wave-transmitting layer, a wave-absorbing layer, a reflective layer, a first insulation layer, a bulletproof layer, a second insulation layer, a shielding layer, and an inner skin. An outer edge and an inner edge are provided at the joint between adjacent bulkhead panels. The outer edge and the inner edge are riveted and fixed to the adjacent bulkhead panels. A conductive gasket is provided between the overlapping surfaces of the outer edge, the inner edge, and the bulkhead panels. Conductive shielding tape is attached to the riveted portions of the outer edge, the inner edge, and the bulkhead panels. Corner fittings are provided at the corners of the box-like structure, and these corner fittings are connected and fixed to adjacent bulkhead panels by bolts. Conductive shielding tape is attached to the connection portions of the corner fittings and the bulkhead panels.

[0006] In some embodiments, the shielding layer is an aluminized zinc-coated steel sheet; the zinc coating thickness of the aluminized zinc-coated steel sheet is greater than or equal to 20 μm; and the thickness of the aluminized zinc-coated steel sheet is 1.5 mm.

[0007] In some embodiments, the conductive pad is a Monel mesh pad or a bidirectional torsion spring with two opposing bending elastic arms; the conductive pad includes a pad disposed between the outer edge and the overlapping surface of the bulkhead and a pad disposed between the inner edge and the overlapping surface of the bulkhead, and each of the conductive pads is pressed by rivets of the corresponding edge to fill the gap between the corresponding edge and the overlapping surface of the bulkhead.

[0008] In some embodiments, the rivets on the outer edge are arranged in a double row along the seam, and the rivets on the inner edge are arranged in a single row along the seam.

[0009] In some embodiments, the corner piece is a split cast corner piece; the corner piece has three connecting surfaces that respectively abut three bulkhead panels that intersect with the corner of the housing; each connecting surface is connected and fixed to the corresponding bulkhead panel by fasteners.

[0010] In some embodiments, the corner of the bulkhead panel is pre-embedded with a tenon; the tenon includes an aluminum corner piece and a steel plate pre-embedded in the aluminum corner piece; fasteners are screwed into the steel plate of the tenon to fix the corner piece to the bulkhead panel.

[0011] In some embodiments, one of the bulkhead panels is provided with a hatch for personnel and equipment to enter and exit, and a door frame that cooperates with the hatch; the door frame is fixed to the entrance and exit of the bulkhead panel, and the hatch is installed on the door frame via a central door hinge; the layer structure of the hatch from the outside to the inside is consistent with that of the bulkhead panel; the hatch is embedded with a bulletproof shielding plate, and the bulletproof shielding plate is fixed to the pre-embedded position of the door panel by bolts.

[0012] In some embodiments, the door frame is provided with a beryllium copper spring, and the door panel profile of the hatch is provided with a blade, which is inserted into the beryllium copper spring to electrically connect the hatch to the door frame; and / or the hatch is provided with a five-point shielded door lock, the five-point shielded door lock including a lock body, a locking stop, a locking rod, a lock cylinder, an inner handle and an outer handle, the locking stop being distributed in a multi-point locking manner along the circumference of the hatch; and / or a sealing strip is provided between the door frame profile and the door panel profile of the hatch, the sealing strip being an EPDM rubber sealing strip, the sealing strip having a B-shaped cross-section.

[0013] In some embodiments, the inclined plate includes a first inclined surface and a second inclined surface connected in sequence; one end of the first inclined surface is connected to the top plate, and the other end is connected to the side plate via the second inclined surface; the top plate, the first inclined surface, the second inclined surface, and the side plate form a continuously variable chamfered top.

[0014] In some embodiments, the reflective layer is a carbon fiber plate with a thickness of 0.4 mm; and / or the bulletproof layer is a polyethylene plate with a thickness of 15 mm; and / or the wave-absorbing layer includes a double-layer wave-absorbing foam layer, wherein the thickness of a single layer of the wave-absorbing foam layer is 10 mm, and the layers are bonded together by a structural adhesive film.

[0015] This utility model's shielded container is constructed by splicing multiple bulkhead panels to form a box, which is then fixed by riveting the inner and outer edges and bolting the corner fittings. This gives the container advantages such as high specific strength, good specific stiffness, and ease of assembly, transportation, and maintenance. Furthermore, the use of mechanical connections such as riveting and bolts for the edges and corner fittings eliminates the need for extensive welding and post-weld straightening, grinding, flaw detection, and secondary anti-corrosion processes, thus simplifying the process and reducing manufacturing costs. Each bulkhead panel integrates an outer skin, a wave-transmitting layer, a wave-absorbing layer, a reflective layer, a first insulation layer, a bulletproof layer, a second insulation layer, a shielding layer, and an inner skin, giving the container comprehensive functions including insulation, bulletproofing, stealth, and electromagnetic shielding. By placing conductive gaskets between the overlapping surfaces of the edges and bulkhead panels and applying conductive shielding tape to the riveted edges and the connections between the corner fittings and bulkhead panels, electromagnetic leakage at the seams is overcome. This ensures continuous and reliable electromagnetic shielding while maintaining low manufacturing costs and high cost-effectiveness.

[0016] The outer region of the bulkhead in this invention is used for wave transmission, absorption, and reflection loss, while the inner region is used for bulletproof protection and electromagnetic shielding. The continuously angled chamfered top disperses the strong reflective surface of the top transition area, and the layered structure of the bulkhead within the chamfered top further absorbs and reflects incident electromagnetic waves; the aluminum-zinc coated steel plate shielding layer forms a continuous shielding surface on the inner side of the cabin. Thus, the shielded cabin, while differing from the structure of a regular hexahedral metal shielded cabin, simultaneously achieves radar stealth, bulletproof protection, and electromagnetic shielding. Attached Figure Description

[0017] The above and other features, properties and advantages of this utility model will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein: Figure 1 This is a side sectional view of an embodiment of the shielded container according to the present invention; Figure 2 This is a horizontal cross-sectional schematic diagram of an embodiment of the shielded container according to the present invention; Figure 3 This is a schematic diagram of the connection of one embodiment of the bulkhead panel; Figure 4 This is a connection diagram of another embodiment of the bulkhead; Figure 5 This is a schematic diagram of the interlayer structure of the bulkhead panels; Figure 6 This is a schematic diagram showing the connection between the bulletproof plate and the frame; Figure 7 This is a structural diagram of the base plate; Figure 8 This is a schematic diagram of the tenon structure and its pre-embedded parts; Figure 9 This is a diagram showing the installation of the tenon; Figure 10 This is a diagram illustrating the installation of the edging. Figure 11 This is a schematic diagram of the inner cover of the bottom corner piece; Figure 12 This is a schematic diagram of the inner cover of the top corner piece; Figure 13 This is a diagram showing the installation of the bottom corner bracket; Figure 14 This is a diagram showing the installation of the corner bracket; Figure 15 This is a schematic diagram of the hatch; Figure 16 This is a schematic diagram of the hatch installation; Figure 17 This is a schematic diagram of the cross-section of the door panel profile; Figure 18 This is a schematic diagram of the cross-section of the door frame profile; Figure 19 This is a diagram of the boarding handrail at the middle door; Figure 20 This is a schematic diagram of a five-point lock; Figure 21 This is a top-down view of the shielded modular shelter; Figure 22 This is a side view of the shielded modular shelter; Figure 23 This is a structural diagram showing the connection between the bulkhead panels and the frame; Figure 24 yes Figure 16 A close-up view of the hatch shown.

[0018] Figure label: 100. Shielded Container; 1. Bulkhead Panel; 11. Top Plate; 12. Bottom Plate; 13. Side Plate; 14. Inclined Plate; 141. First Inclined Surface; 142. Second Inclined Surface; 15. End Plate; 26. Outer Skin; 21. Wave-Transmitting Layer; 22. Wave-Absorbing Layer; 23. Reflective Layer; 24a. First Insulation Layer; 25. Bulletproof Layer; 24b. Second Insulation Layer; 32. Shielding Layer; 27. Inner Skin; 7. Frame; 71. Crossbeam; 72. Longitudinal Beam; 70. Thermal Bridge; 80. Bolt; 122. Polyurethane Foam Layer; 53. Tenon; 54a. Inner Cover of Bottom Corner Piece; 54b. Inner Cover of Top Corner Piece; 5a. Bottom Corner Piece; 5b. Top corner piece; 5. Corner piece; 41. Outer edging; 42. Inner edging; 43. Rivet; 6. Hatch door; 62. Middle door hinge; 64. Door panel; 61a. Door frame profile; 64a. Door panel profile; 65. Beryllium copper spring; 66. Five-point shielded door lock; 661. Lock body; 662. Locking mechanism; 663. Locking bar; 664. Inner opening latch; 665. Inner handle; 666. Outer handle; 67. Sealing strip; 68. Boarding handrail; 81. Reinforcing rib; 82. Power adapter board; 83. Shielded observation window; 84. Air conditioning vent ventilation waveguide; 85. Filter; 86. Ventilation waveguide; 87. Fan. Detailed Implementation

[0019] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the present invention and not to limit it. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made to the present invention without departing from the scope or spirit thereof. For example, features shown or described as part of one embodiment may be used with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations that fall within the scope of the appended claims and their equivalents.

[0020] As used herein, the terms “first,” “second,” and “third” are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of the individual components.

[0021] It should be noted that the "bullet panel" referred to in this utility model refers to a large composite panel (also called a bulkhead or wall panel) assembled to form a container body. The top panel, bottom panel, side panel, and inclined panel are all specific panels located in corresponding positions within the bulkhead panel. In the functional layer abbreviations appearing for the first time in this document, FD refers to bulletproof, YS refers to stealth, FDYS refers to integrated bulletproof and stealth; PE refers to polyethylene.

[0022] like Figure 1 , Figure 2 , Figure 21 and Figure 22As shown, the shielded container 100 of this utility model includes multiple bulkhead panels 1, which are spliced ​​together to form a box-like structure. Each bulkhead panel 1 includes a top panel 11, a bottom panel 12, side panels 13, and an inclined plate 14 connecting the top panel 11 and the side panels 13. Figure 1 and Figure 2 The outline of the shielded container 100 of this utility model is only shown in the illustration and does not represent the actual shape or structure of the shielded container 100.

[0023] In this utility model, the shielded container 100 adopts a large-panel structure, which is formed by connecting and fixing ten pre-pressed bulkhead panels 1, twenty edge bands, and eight corner pieces 5 with bolts, rivets, structural adhesive, sealant, and copper foil. The edges between adjacent bulkhead panels 1 are riveted together by inner edge bands 42 and outer edge bands 41; the top corner formed by the inclined plate 14 and the top plate 11 is riveted together by inclined top corner bands, and the side corner formed by the inclined plate 14 and the side plate 13, and the bottom corner formed by the side plate 13 and the bottom plate 12 are respectively connected and fixed by bolts with waterproof corner pieces, thus splicing together a box-type structure.

[0024] In related technologies, container cabins are usually in the shape of a regular hexahedron with a right-angle transition between the top and the side walls. This results in a large scattering cross section for external radar detection and limited stealth performance.

[0025] like Figure 1 , Figure 2 and Figure 21 As shown, the inclined plate 14 includes a first inclined surface 141 and a second inclined surface 142 connected in sequence. One end of the first inclined surface 141 is connected to the top plate 11, and the other end is connected to the side plate 13 via the second inclined surface 142. The top plate 11, the first inclined surface 141, the second inclined surface 142 and the side plate 13 form a chamfered top with a continuously changing angle.

[0026] Specifically, the first inclined surface 141 and the second inclined surface 142 have different normal directions. The top plate transitions to the side plate 13 via the first inclined surface 141 and the second inclined surface 142, changing the top of the enclosure from a single right-angle turn to a segmented, chamfered top. When external radar waves are incident on the top area of ​​the enclosure, the top plate 11, the first inclined surface 141, the second inclined surface 142, and the side plate 13 form reflective surfaces facing different directions. This disperses the specular reflections that were originally concentrated at the right-angled part of the top side into different directions, thereby reducing radar echoes returning in the same reconnaissance direction.

[0027] The shielded container 100 of this utility model adopts an internal shielding design, and shielding is applied to the doors, windows, air inlets, air outlets, power supply boxes, signal boxes, air conditioner and heater inlets and outlets. Filters are installed on all through-wall lines, so that the shielded container 100 has an attenuation of not less than 40dB in the frequency range of 10kHz to 100kHz and an attenuation of not less than 60dB in the frequency range of 0.1MHz to 18GHz.

[0028] Multiple bulkhead panels 1 are joined together with edge riveting and corner bolts to form a box body, which has the advantages of easy assembly, transportation and maintenance; the continuously variable angled chamfered top can reduce the area of ​​the strong reflective plane facing the reconnaissance direction, thereby reducing the radar echo signal returning to the reconnaissance direction.

[0029] like Figure 5 As shown, in one embodiment, the bulkhead 1 may include, from the outside to the inside, an outer skin 26, a wave-transparent layer 21, a wave-absorbing layer 22, a reflective layer 23, a first thermal insulation layer 24a, a bulletproof layer 25, a second thermal insulation layer 24b, a shielding layer 32, and an inner skin 27, with each layer bonded together by high-strength structural adhesive.

[0030] The wave-transparent layer 21 is located outside the wave-absorbing layer 22, and the reflective layer 23 is located inside the wave-absorbing layer 22, allowing externally incident electromagnetic waves to pass through the outer skin 26 and the wave-transparent layer 21 into the wave-absorbing layer 22. The wave-absorbing layer 22 attenuates the incident electromagnetic waves. Electromagnetic waves that are not sufficiently attenuated reach the reflective layer 23 and are reflected back to the wave-absorbing layer 22, causing the electromagnetic waves to pass through the wave-absorbing layer 22 again and be further attenuated. In this way, the wave-transparent layer 21, the wave-absorbing layer 22, and the reflective layer 23 form a wave-absorbing and reflecting structure from the outside in, rather than simply stacking wave-absorbing materials, bulletproof materials, and metal shielding materials.

[0031] The outer skin 26 is made of carbon fiber composite material. Optionally, the outer skin 26 of the top plate 11, side plate 13 and inclined plate 14 can be made of 0.4mm thick fiberglass absorbing skin to meet the technical requirements.

[0032] The wave-transparent layer 21 is made of a high-strength, high-wave-transparency material.

[0033] The absorbing layer 22 can be selected as absorbing foam. For example... Figure 5 As shown, the absorbing layer 22 includes an absorbing foam layer, which consists of two layers. The thickness of each absorbing foam layer is 10 mm. Adjacent absorbing foam layers are bonded together with a structural adhesive film, and a gradient design is performed in the thickness direction of the absorbing foam to achieve electromagnetic impedance matching.

[0034] The reflective layer 23 is conductive to reflect electromagnetic waves. In this embodiment, the reflective layer 23 is made of carbon fiber plate with a thickness of 0.4 mm.

[0035] The insulation layer (including the first insulation layer 24a and the second insulation layer 24b) is a polyurethane foam layer. The thickness is selected according to different bulkhead panels 1. The density of the polyurethane foam layer can be selected as 70 kg / m³, and its oxygen index can reach 23. The oxygen index is used to characterize the flame retardant performance of the material, that is, it indicates that the polyurethane foam layer can maintain combustion under the condition that the oxygen volume fraction reaches 23%, so that the insulation layer has a certain fireproof and flame retardant performance.

[0036] The bulletproof layer 25 is used to resist external attacks. In one embodiment, the bulletproof layer 25 is made of polyethylene (PE) sheet with a thickness of 15mm, so that the shielded cabin 100 can be protected against the penetration of a Type 95 5.8mm ordinary steel core bullet at a distance of 100m under the condition of 0 degrees normal angle.

[0037] The shielding layer 32 is used to achieve electromagnetic shielding. In this embodiment, the shielding layer 32 is an aluminized zinc-coated steel plate with a thickness of 1.5 mm. Specifically, the steel plate substrate is used to form the conductive layer required for electromagnetic shielding, and the aluminized zinc coating is used to improve the corrosion resistance and assembly contact stability of the shielding layer 32 surface, prevent the steel plate substrate from rusting, and thus ensure that the shielding layer 32 stably performs its electromagnetic shielding function.

[0038] The inner skin 27 is made of aluminum-zinc coated sheet, with a thickness of up to 1.5mm, to enable electrical connection.

[0039] Continue to refer to Figure 5 In one embodiment, the surface density of the YS layer (composed of a wave-transmitting layer 21, a wave-absorbing layer 22, and a reflective layer 23) of the bulkhead 1 is 6.5 kg / m², the surface density of the FD insulation layer (bulletproof layer 25, first insulation layer 24a, and second insulation layer 24b) is about 15 kg / m², and the surface density of the shielding layer 32 is 13 kg / m².

[0040] like Figure 6 As shown, the bulletproof layer 25 of the bulkhead panel 1 is pre-embedded and fixed to the frame 7 by bolts to ensure structural strength. In this embodiment, the bulkhead panel 1 can withstand the following static loads without plastic deformation or damage: the uniformly distributed load (four corner supports) of the bottom plate 12 is 3kN / m², the concentrated load on a 500mm×500mm area is 10kN, and the point load is 1kN at each of the four 10mm×10mm pressure points distributed in a square with a center distance of 300mm between adjacent points; the uniformly distributed load of the top plate 11 is 2kN / m², and the concentrated load on a 300mm×600mm area is 3kN.

[0041] The outer skin 26, wave-transmitting layer 21, wave-absorbing layer 22, reflective layer 23, first thermal insulation layer 24a, bulletproof layer 25, second thermal insulation layer 24b, shielding layer 32, and inner skin 27 are integrated into the same bulkhead 1 from the outside to the inside, so that the bulkhead 1 has the comprehensive functions of wave transmission, wave absorption, reflection, thermal insulation, bulletproof and electromagnetic shielding. The gradient design of the double-layer wave-absorbing foam, combined with the reflective layer, can broaden the wave absorption frequency band and enhance electromagnetic wave loss, thereby achieving multi-functional integration while controlling the thickness and weight of the plate.

[0042] like Figure 7As shown, in one embodiment, the base plate 12 does not require ballistic stealth (FDYS) functionality, and its interlayer structure differs from that of the top plate 11, side plates 13, and inclined plates 14. The base plate 12 consists of an inner skin 27, a polyurethane foam layer 122, and an outer skin 26, arranged from the inside out. The inner skin 27 is made of galvanized aluminum sheet with a thickness of 1.5 mm; the polyurethane foam layer 122 has a thickness of 100 mm and a density of 70 kg / m³; and the outer skin 26 is made of aluminum sheet with a thickness of 1.0 mm. Thus, the inner skin 27 of the galvanized aluminum sheet ensures electromagnetic shielding and electrical connection; the polyurethane foam layer provides both insulation and load-bearing capacity, reducing weight while meeting the support and shielding requirements of the base plate.

[0043] like Figure 1 and Figure 6 As shown, the bulkhead panel 1 includes a frame 7. The frame 7 is made of high-strength, lightweight 6063 series aluminum alloy. The profiles are welded together by argon arc welding to form an integral frame, ensuring the flatness and structural strength of the bulkhead panel 1 after molding. The frame 7 includes crossbeams 71 and longitudinal beams 72. The crossbeams 71 extend laterally along the bulkhead panel 1, and the longitudinal beams 72 extend longitudinally along the bulkhead panel 1. The crossbeams 71 and longitudinal beams 72 are staggered to form the load-bearing system of the frame 7. Embedded parts are welded, riveted, or bonded to corresponding positions on the frame 7. Some of the embedded parts are directly bonded to the inner skin 27 and the outer skin 26. Linden wood strips are installed between the frame 7 and the inner skin 27 and the outer skin 26 as thermal bridges 70 to interrupt the metal thermal bridge and provide thermal insulation. The 6063 series aluminum alloy frame reduces weight while ensuring structural strength. The thermal bridge 70 between the frame 7 and the skin can break the metal thermal bridge and improve the thermal insulation performance of the bulkhead 1. Figure 23 It shows Figure 6 A sectional view of bolt 80. (See figure) Figure 23 As shown, the multi-layered structure of the bulkhead 1 is connected to the frame 7 by bolts 80.

[0044] like Figure 8 and Figure 9 As shown, in one embodiment, a tenon 53 is pre-embedded at the corner of the bulkhead panel 1. The tenon 53 is in the form of aluminum-clad iron, including an aluminum corner piece and a steel plate pre-embedded and fixed within the aluminum corner piece. In this embodiment, the steel plate is a Q235A steel plate. The tenon 53 is used for the installation and fixing of the corner of the shielded container 100. As described below, the fasteners of the corner piece 5 are screwed into the steel plate of the tenon 53, thereby fixing the corner piece 5 to the bulkhead panel 1. The aluminum-clad iron tenon 53 with the steel plate pre-embedded within the aluminum corner piece allows the fasteners to be anchored to the steel plate, achieving high threaded connection strength and thus improving the reliability of the corner installation and fixing.

[0045] In one embodiment, to ensure the shielding performance and structural strength of the shielded container 100, based on the 60dB electromagnetic shielding requirement, the shielding layer 32 of the top plate 11, inclined plate 14, and left and right side plates 13 is made of 1.5mm thick aluminum-zinc coated steel plate, and the main body plates rely on this shielding layer 32 for electrical connection. The outer skin 26 of the top plate 11, inclined plate 14, and left and right side plates 13 is made of 0.4mm thick wave-transparent skin to balance structural strength and electromagnetic wave transmission function.

[0046] like Figure 10 As shown, in one embodiment, the seam between two adjacent bulkhead panels 1 is provided with an outer edge 41 and an inner edge 42. Both the outer edge 41 and the inner edge 42 are made of aluminum and are riveted and fixed to the two adjacent bulkhead panels 1 by rivets 43 to strengthen the connection and seal. The electrical connection between the bulkhead panels 1 is achieved by shielding material. In this embodiment, the surface of the outer edge 41 is sprayed with a wave-absorbing coating; the inner edge 42 is polished to the natural aluminum color and then riveted to the inner skin 27 of the bulkhead panel 1, and conductive copper foil is pasted on the outside of the inner edge 42.

[0047] like Figure 10 As shown, the rivets 43 on the outer edge 41 are arranged in a double row along the seam, while the rivets 43 on the inner edge 42 are arranged in a single row along the seam. In this embodiment, the width of the outer edge 41 is 80mm, and its double-row rivets 43 are spaced 35mm apart in the height direction and 100mm apart laterally, and are arranged in a double row, staggered. The width of the inner edge 42 is 35mm, and its single-row rivets 43 are arranged in the center, spaced 50mm apart, and staggered with the opposite side.

[0048] Furthermore, conductive pads are provided between the overlapping surfaces of the outer edge 41 and the bulkhead 1, and between the overlapping surfaces of the inner edge 42 and the bulkhead 1. Each conductive pad is pressed together by the rivet 43 of the corresponding edge to fill the gap between the overlapping surfaces of the corresponding edge and the bulkhead 1. The conductive pads are Monel mesh pads or bidirectional torsional springs with two opposing flexible arms, which elastically abut against the opposing surfaces of the edge and the bulkhead 1, respectively. In addition, conductive shielding tape is attached to the riveted parts of the outer edge 41, the inner edge 42 and the bulkhead 1; conductive shielding tape is also attached to the edge where the corner piece 5 connects to the bulkhead 1.

[0049] Figure 3 and Figure 4 The connection scenarios for two different shapes of bulkhead panel 1 are shown. Figure 3 An example of a connection at the side corner is shown; Figure 4 An example of a connection at the apex is shown. Figure 4 The diagram shows end plate 15, where both end plate 15 and side plate 13 are bulkhead plates 1, and both are made of the same material. (See diagram for reference.) Figure 3 and Figure 4As shown, this utility model provides two connection embodiments for achieving shielded electrical continuity at the joint of the bulkhead panel 1. In this embodiment, to avoid electromagnetic leakage at the riveting point, the overlap size is increased at the joint and close riveting is used to reduce the spacing of the rivets 43. Conductive shielding tape is applied to the joint, and a bidirectional torsion spring is added at the overlapping surface and tightened with interference fit to suppress gap leakage and maintain electrical continuity at the joint.

[0050] Conductive gaskets are used to establish and maintain stable surface contact at non-welded lap joints by rivet compression and filling gaps. Monel wire mesh gaskets maintain long-term conductive stability due to their nickel-based corrosion resistance. Bidirectional torsion springs provide continuous compression and rebound with their elastic arms. The outer edging is riveted in a double-row staggered and close-fitting manner, while the inner edging is riveted in a single row, taking into account both shielding and sealing at the rivet joints and assembly economy. Conductive shielding tape further seals potential leaks at the riveted joints and corner edges, thus ensuring that the modular container still obtains continuous electromagnetic shielding throughout the entire enclosure.

[0051] like Figures 11 to 14 As shown, in one embodiment, the corner of the shielded container 100 is provided with corner fittings 5. The corner fittings 5 ​​are split cast corner fittings and are made by precision die casting process. Their dimensions meet the requirements of the corresponding military container corner fitting specifications. The corner fittings 5 ​​have three connecting surfaces that respectively fit with the three bulkhead panels 1 that intersect with the corner of the container. Each connecting surface is connected and fixed to the corresponding bulkhead panel 1 by bolts, so that the three bulkhead panels 1 intersecting at the corner are connected into one piece by the corner fittings 5, and the eight bulkhead panels 1 are connected into a whole.

[0052] Optionally, the shielded container 100 has eight corner pieces 5, two each for the bottom left, bottom right, top left, and top right, wherein the bottom left and bottom right corner pieces are symmetrical, and the top left and top right corner pieces are symmetrical. Figure 11 and Figure 12 As shown, during the assembly of the compartment, steel corner protectors are installed at the notches of the three bulkhead panels 1. After the corner protectors are ground to the natural steel color, they are riveted and fixed to the inner skin 27 of the bulkhead panel 1 to ensure electrical connection and sealing at that point. Figure 11 The inner cover 54a of the bottom corner piece 5a is shown. Figure 12 The inner cover 54b of the corner piece 5b is shown. (See diagram.) Figure 13 and Figure 14 As shown, the corner piece 5 is fixed by bolts screwed into the steel plate of the tenon 53 pre-embedded in the corner of the bulkhead plate 1; Figure 13 The installation of the bottom corner piece 5a is shown. Figure 14 The installation of the top corner member 5b is shown. In this embodiment, the corner member 5, which serves as the bottom corner member 5a, and the corner member 5, which serves as the top corner member 5b, can withstand a load of 2.25G in either vertical direction, where G is the maximum total mass of the shielded container 100.

[0053] In this embodiment, the split-type cast corner piece 5 is connected to the three intersecting bulkhead plates 1 at the corner with high strength through three connecting surfaces, so as to achieve reliable connection and positioning of the corner; the steel plate with bolts screwed into the tenon 53 obtains high thread connection strength; the conductive shielding tape at the corner inner cover and the edge of the corner piece ensures the electrical connection and sealing of the corner.

[0054] like Figure 15 , Figure 16 and Figure 24 As shown, in one embodiment, one of the bulkhead panels 1 is equipped with a hatch 6 for personnel and equipment to enter and exit, and a door frame that cooperates with the hatch 6. The door frame is fixed to the entrance and exit of the bulkhead panel 1, and the hatch 6 is installed on the door frame via a central door hinge 62. In this embodiment, the opening dimensions of the hatch 6 are 1700mm high × 800mm wide. The layer structure of the hatch 6 from the outside to the inside is consistent with that of the bulkhead panel 1. The hatch 6 has an embedded bulletproof shielding plate, which is fixed to the pre-embedded position of the door panel 64 of the hatch 6 by bolts to achieve the bulletproof shielding function of the hatch 6.

[0055] like Figure 17 and Figure 18 As shown, the profiles of the door panel 64 and the door frame of the hatch 6 are both made of high-strength, lightweight 6063 series aluminum alloy. The profiles of the door panel 64 are welded into a single unit, and the flatness of the hatch 6 is ensured during the molding process. The profiles of the door frame are integrally formed using a pultrusion process. After the door panel 64 and door frame are welded, their surfaces are treated with nickel-phosphorus plating to ensure the electrical connection between the inner skin 27 and the frame. Figure 19 As shown, a boarding handrail 68 is installed on the inside of the door panel 64 of the hatch 6 to facilitate the boarding and disembarking of personnel.

[0056] like Figure 16 and Figure 18 As shown, in one embodiment, a beryllium copper spring 65 is provided on the door frame, and the profile of the door panel 64 of the hatch 6 is provided with a knife edge, which is inserted into the beryllium copper spring 65 to make the hatch 6 electrically connected to the door frame.

[0057] like Figure 20 As shown, the hatch 6 is equipped with a five-point shielding door lock 66. The five-point shielding door lock 66 includes a lock body 661, a locking stop 662, a locking rod 663, a lock cylinder, an inner handle 665, and an outer handle 666. The locking stop 662 is distributed around the hatch 6 and is a multi-point locking mechanism. In this embodiment, the five-point shielding door lock 66 is made entirely of stainless steel.

[0058] A sealing strip 67 is provided between the door frame profile 61a and the door panel profile 64a of the hatch 6. The sealing strip 67 is a EPDM rubber sealing strip with a B-shaped cross section.

[0059] The hatch 6 adopts the same layered structure as the bulkhead 1 and has an embedded bulletproof shielding plate, so that the door opening has the same shielding and bulletproof protection as the bulkhead; the blade of the door panel 64 is inserted into the beryllium copper spring 65 of the door frame to form a continuous elastic electrical contact along the circumference of the door, suppressing electromagnetic leakage at the door gap; the five-point shielded door lock 66 locks at multiple points along the circumference of the door to make the door evenly pressed around, ensuring that the sealing strip 67 and the beryllium copper spring 65 are continuously and reliably pressed together; the B-shaped EPDM rubber sealing strip 67 is weather-resistant and has good resilience, and continuously presses and fills the door gap when the door is closed to achieve airtightness and watertightness of the door.

[0060] like Figure 21 As shown, the main components affecting the shielding effectiveness of the shielded container 100 are the joints between the hatch 6 and the bulkhead 1, as well as the various openings; these openings include air inlets and outlets, air conditioning inlets and outlets, power outlets, signal outlets, and observation windows. As an optional embodiment of this utility model, the shielded container 100 is provided with corresponding shielding structures at the aforementioned openings.

[0061] In this embodiment, in order to suppress electromagnetic leakage at the joints of various openings, conductive pads are installed at the joints of openings such as the hatch 6, shielded observation window 83, ventilation waveguide 86, and power adapter plate 82, so that the edges of each opening component are electrically connected to the inner skin 27 of the bulkhead plate 1 through the conductive pads, thereby maintaining the continuity of the shielding layer at each opening.

[0062] In this embodiment, a power port is provided on one of the bulkhead panels 1 of the container, and a power adapter plate 82 is provided at the power port. The power adapter plate 82 is used for the transfer of power lines through the wall. A conductive gasket is added to the joint of the power adapter plate 82 and electrically connected to the inner skin 27 of the bulkhead panel 1 to achieve shielding at the power port.

[0063] In this embodiment, the bulkhead 1 is provided with a shielded observation window 83. A conductive gasket is added to the seam of the shielded observation window 83 and electrically connected to the inner skin 27 of the bulkhead 1, so as to suppress electromagnetic leakage at the window while meeting the observation requirements.

[0064] In this embodiment, since the air inlet and outlet and the air conditioning inlet and outlet have ventilation requirements, and the air conditioning inlet and outlet are openings with large areas and maximum linear dimensions, a ventilation waveguide 86 is provided at the air inlet and outlet, and an air conditioning vent ventilation waveguide 84 is provided at the air conditioning inlet and outlet. Both the air conditioning vent ventilation waveguide 84 and the ventilation waveguide 86 are steel waveguide ventilation windows, which have low wind resistance, high strength, and high shielding effectiveness. They are electrically connected to the inner skin 27 of the bulkhead 1 via a conductive waveguide plate to achieve shielding of the opening while satisfying ventilation. In this embodiment, the ventilation waveguide 86 is composed of several parallel hexagonal cutoff waveguide holes, with a waveguide hole diameter of 3.18 mm and a thickness of 13 mm. The opening size of the air inlet and outlet is 160 mm × 160 mm. The opening door opens upward and is connected by a hinge. A beryllium copper spring 65 and a sealing strip 67 are provided between the opening door and the opening frame. The opening door is equipped with an opening lock.

[0065] In this embodiment, filters 85 are installed on the power lines and signal lines passing through the bulkhead 1. The filters 85 are used to filter out electromagnetic interference transmitted into and out of the cabin via cables. The shielded cabin 100 also shields the power supply box, signal box and the air inlet and outlet of the heater.

[0066] In this embodiment, a fan 87 is provided at the air inlet and outlet. The fan 87 is used to drive air convection to achieve ventilation of the cabin.

[0067] In this embodiment, the bulkhead 1 may also be provided with reinforcing ribs 81, which are used to enhance the structural strength and rigidity of the bulkhead 1.

[0068] All joints of the various opening components, such as hatch 6, power adapter plate 82, shielded observation window 83, air conditioning vent ventilation waveguide 84, and ventilation waveguide 86, are electrically connected to the inner skin 27 of the bulkhead plate 1 via conductive gaskets. The air conditioning vent ventilation waveguide 84 and ventilation waveguide 86 are combined with a steel cutoff waveguide structure to achieve both ventilation and shielding. The through-wall lines are filtered by filter 85, so that the container can meet the needs of power supply, observation, air conditioning, and ventilation while suppressing electromagnetic leakage at each opening and maintaining the continuity of the shielding layer of the entire container. Fan 87 realizes forced ventilation. Reinforcing ribs 81 improve the structural strength and rigidity of bulkhead plate 1.

[0069] As an optional embodiment of this utility model, the shielded container 100 may further include the following structure: the bottom of the shielded container 100 is provided with multiple skids extending along its length and arranged in parallel. The skids are made of high-strength and lightweight magnesium-aluminum alloy profiles (three in this embodiment, spaced 1750mm apart), so as to allow the shielded container 100 to be dragged short distances on hard flat roads, snow and sand, and to provide a buffering effect when being hoisted and unhooked (not shown in the figure); the door 6 may be provided with a segmented limiter, with an opening angle of not less than 110° and a limiting angle of 30°, 90° and 110° in three segments; the middle door hinge 62 may be an external hinge formed by machining Q345 steel, and the closing flatness and vertical clearance of the door 6 may be adjusted by the height and position of the hinge seat; an inward opener may be provided at the door lock so that the trapped personnel inside can open the door 6 from the inside of the container without tools. By passing the brass padlock through the round holes on the inner door latch 664 and the outer handle 666, the hatch 6 can be locked from the outside. Once locked from the outside, simply rotate the inner door latch to release the latch and open the door. The side panel 13 of the shielded container 100 may also be provided with air inlets and outlets, and steel waveguide ventilation windows are provided at the air inlets and outlets. In this embodiment, the diameter of the waveguide ventilation window is 3.18 mm and the thickness is 13 mm, and it is electrically connected to the inner skin 27 of the bulkhead 1.

[0070] As an optional embodiment of this utility model, the shielded container 100 can be verified by random vibration analysis. For example, random vibration analysis can be performed using the finite element analysis software ABAQUS and the power spectral density (PSD) curve based on the vibration environment data of the combined wheeled vehicle in GJB150.16A, in order to verify the strength of the shielded container 100 under road transport conditions.

[0071] In conjunction with the above embodiments, to verify the electromagnetic shielding effect of the shielded cabin of this invention, the radar cross section (RCS) simulation in this scheme was performed using the mature commercial electromagnetic simulation analysis software CSTStudioSuite, and the algorithm used was the A solver. For the RCS simulation of the metal-material beveled cabin, all models except the windows were set using PEC. For the RCS simulation of the absorbing composite material beveled cabin, the cabin panels and doors were set using PEC-coating absorbing composite material, and the glass was set using PEC-coating absorbing material. Compared to the metal-material beveled cabin, the average RCS reduction effect of the absorbing composite material beveled cabin at various frequencies, ground angles, and polarization modes is shown in Table 1. Table 1. Summary of average RCS reduction values ​​of the microwave absorbing composite beveled cabin at different frequencies, ground angles, and polarization modes.

[0072] As shown in Table 1, a smaller RCS value indicates a better electromagnetic shielding effect. Compared with metal shielding units in related technologies, the shielding unit of this invention has effective RCS reduction performance in all frequency bands. The average RCS reduction value is 11.6 dBsm in the L-band, 12.5 dBsm in the S-band, 20.6 dBsm in the C-band, 22.3 dBsm in the X-band, 24.7 dBsm in the Ku-band, and 26.2 dBsm in the Ka-band. This meets the RCS reduction requirements for shielding units in all frequency bands.

[0073] In conjunction with the above embodiments, this utility model integrates functional layers such as shielding, wave absorption, bulletproofing, and heat insulation into the same bulkhead panel 1, and splices them into a box body by splicing large panels, riveting the edges, and connecting the corner pieces 5 with bolts. This allows the container to retain the advantages of the spliced ​​structure, such as ease of manufacturing, transportation, assembly, and maintenance, while overcoming electromagnetic leakage at the seams to obtain continuous and reliable electromagnetic shielding throughout the entire box body, and also has comprehensive protective functions such as bulletproofing, stealth, and heat insulation. The conductive gasket is made of Monel wire mesh or bidirectional twisted spring sheet. At the non-welded edge overlap, it is pressed and filled by rivets 43 to establish and maintain stable surface contact. The outer edge 41 is riveted in double rows and riveted in single rows with the inner edge 42, which takes into account the shielding and sealing of the rivet seam and the assembly economy, thus forming an auxiliary shielding electrical continuity for each connection part in addition to the welding continuity. The corner of the container is connected to the three intersecting bulkhead panels 1 with three high-strength connecting surfaces by separate cast corner fittings 5. The steel plates embedded in the aluminum corner fittings are bolted in to obtain high threaded connection strength and improve the reliability of the corner connection. The reflective layer 23, bulletproof layer 25, and radar-absorbing layer 22 of the bulkhead 1 are made of corresponding lightweight functional materials and are combined with a continuously variable angled top formed by the first slope 141 and the second slope 142. While controlling the thickness and weight of the plate and achieving lightweighting, the radar absorption and stealth effects are enhanced, and the strong reflective area of ​​the top facing the reconnaissance direction is reduced, thereby reducing radar echo. The hatch 6 adopts the same layered structure as the bulkhead 1 and has an embedded bulletproof shielding plate. Combined with the beryllium copper spring 65 at the door frame, the five-point shielding door lock 66 and the B-shaped sealing strip 67, the door opening has the same shielding, bulletproof and airtight and watertight performance as the bulkhead. The above-mentioned connection and shielding treatment mainly adopts mechanized processes such as riveting, bolting and applying conductive shielding tape, which eliminates the need for a large number of welding, post-weld correction, grinding, flaw detection and secondary anti-corrosion processes, thereby simplifying the process, reducing weight and manufacturing costs while ensuring electromagnetic shielding effectiveness.

[0074] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible variations and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A shielded modular housing, characterized in that, It includes multiple bulkhead panels, which are assembled to form a box-like structure; wherein, The bulkhead panels include a top panel, a bottom panel, side panels, and an inclined plate connecting the top panel and the side panels; The inclined plate includes a first inclined surface and a second inclined surface connected in sequence; One end of the first inclined surface is connected to the top plate, and the other end is connected to the side plate via the second inclined surface; The top plate, the first inclined surface, the second inclined surface, and the side plate form a chamfered top with continuously changing angles; At least one of the bulkhead panels comprises, from the outside to the inside, an outer skin, a wave-transparent layer, a wave-absorbing layer, a reflective layer, a first thermal insulation layer, a bulletproof layer, a second thermal insulation layer, a shielding layer, and an inner skin; The shielding layer is made of aluminum-zinc coated steel plate; The joint between two adjacent bulkhead panels is provided with an outer edge and an inner edge; The outer edge and the inner edge are respectively riveted and fixed to two adjacent bulkhead panels; A conductive pad is provided between the overlapping surfaces of the outer edge, the inner edge and the bulkhead, and conductive shielding tape is attached to the riveted parts of the outer edge, the inner edge and the bulkhead. The corner of the container is provided with corner fittings, which are connected and fixed to the adjacent bulkhead by bolts. The connection between the corner fittings and the bulkhead is covered with conductive shielding tape. The conductive pad is a bidirectional torsion spring with two opposing curved elastic arms; The conductive pads include a pad disposed between the outer edge and the overlapping surface of the bulkhead panel and a pad disposed between the inner edge and the overlapping surface of the bulkhead panel; one of the two elastic arms of the bidirectional torsion spring elastically abuts against the corresponding outer edge or the inner edge, and the other elastically abuts against the bulkhead panel; each of the conductive pads is pressed by rivets of the corresponding edge to fill the gap between the corresponding edge and the overlapping surface of the bulkhead panel; The corner piece is a split-type cast corner piece; The corner piece has three connecting surfaces that respectively fit into three bulkhead panels that intersect with the corner of the box body; Each of the aforementioned connecting surfaces is connected and fixed to the corresponding bulkhead plate by fasteners; The corner of the bulkhead panel is pre-embedded with tenons; The tenon includes an aluminum corner piece and a steel plate embedded in the aluminum corner piece; Fasteners are screwed into the steel plate of the tenon, thereby securing the corner piece to the bulkhead panel; Steel corner protectors are provided at the notches of the three bulkhead panels that intersect at the corners of the container. The corner protectors are polished to the natural steel color and then riveted to the inner skin of the bulkhead panels.

2. The shielded container as described in claim 1, characterized in that, The zinc coating thickness of the aluminized zinc steel sheet is greater than or equal to 20 μm; The thickness of the aluminized zinc-coated steel sheet is 1.5 mm.

3. The shielded container as described in claim 1, characterized in that, The rivets on the outer edge are arranged in a double row along the seam, alternating with each other; The rivets on the inner edge are arranged in a single row along the seam.

4. The shielded container as described in any one of claims 1-3, characterized in that, One of the bulkhead panels is provided with a hatch for personnel and equipment to enter and exit, and a door frame that cooperates with the hatch; The door frame is fixed to the entrance and exit of the bulkhead, and the hatch is installed on the door frame via a central door hinge; The outer to inner layer structure of the hatch is consistent with that of the bulkhead; The hatch is fitted with a bulletproof shielding plate, which is fixed to the pre-embedded position of the hatch panel by bolts.

5. The shielded container as described in claim 4, characterized in that, The door frame is provided with a beryllium copper spring, and the door panel profile of the hatch is provided with a blade. The blade is inserted into the beryllium copper spring to electrically connect the hatch to the door frame.

6. The shielded container as described in claim 4, characterized in that, The hatch is equipped with a five-point shielded door lock, which includes a lock body, a locking mechanism, a locking rod, a lock cylinder, an inner handle, and an outer handle. The locking mechanism is distributed along the circumference of the hatch as a multi-point locking system; and / or A sealing strip is provided between the door frame profile and the door panel profile of the hatch. The sealing strip is a EPDM rubber sealing strip with a B-shaped cross section.

7. The shielded container as described in any one of claims 1-3, characterized in that, The reflective layer is a carbon fiber plate with a thickness of 0.4 mm; and / or The bulletproof layer is a 15mm thick polyethylene sheet; and / or The microwave absorbing layer includes a double-layer microwave absorbing foam layer, with each layer having a thickness of 10 mm, and the layers are bonded together by a structural adhesive film.

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