A new type of civil air defense door leaf with multi-rib structure

Abstract

The utility model belongs to the technical field of civil air defense door, concretely relates to a new civil air defense door leaf of many rib structures, is applicable to single door and double door structure, it includes door frame, door frame and door leaf fixed assembly connection, be provided with door leaf panel on door leaf fixed assembly, the back of door leaf panel is provided with dense rib subassembly, dense rib subassembly includes a plurality of dense rib beams, a plurality of dense rib beams include crossbeam, a plurality of vice beams that are parallel to each other are provided between crossbeams, a plurality of vice beams are vertically arranged between crossbeams, and the detachable connection between door frame, door leaf fixed assembly, door leaf and dense rib subassembly, the whole door leaf adopts the detachable connection mode flexible assembly, not only is convenient for the independent processing of each component in the production manufacturing process, reduces processing difficulty and cost, and also facilitates handling and unloading, reduces the transportation space occupation and transportation cost, simultaneously, can operate to single component, does not need to dismantle or replace as a whole, improves installation efficiency, reduces maintenance cost, prolongs the service life of door leaf.

Description

Technical Field

[0001] This utility model belongs to the field of civil defense door technology, specifically relating to a new type of civil defense door leaf with a multi-rib structure, which is suitable for single-leaf and double-leaf door structures. Background Technology

[0002] As a crucial protective device in civil defense projects, air-raid shelter doors play an irreplaceable role in ensuring the safety of personnel and supplies. Their core function is to effectively block the intrusion of shock waves, toxic agents, and other harmful substances during emergencies such as air raids, providing a safe shelter for personnel.

[0003] Traditional air-raid shelter doors are mostly manufactured using a one-piece casting method. This manufacturing process involves casting all the necessary materials for the door leaf, such as steel bars and concrete, into a single shape according to design requirements. While one-piece casting can, to a certain extent, ensure the structural integrity and strength of the door leaf, giving it better impact resistance to cope with the enormous destructive forces in extreme situations such as air raids, this method is not ideal.

[0004] However, this type of monolithically cast-in-place air-raid shelter door has significant drawbacks. Firstly, due to the monolithic casting process, the door panels are extremely heavy. The excessive weight requires substantial manpower and resources for installation, necessitating the use of large lifting equipment for accurate placement. This not only increases installation costs but also places high demands on the installation site conditions. In locations with limited space or equipment, installation will face significant difficulties. Secondly, the excessive weight also causes considerable inconvenience for operators during daily use and maintenance. For example, opening and closing the door requires considerable effort and may even necessitate the use of additional assistive devices, undoubtedly reducing the efficiency and convenience of the air-raid shelter door.

[0005] On the other hand, the doors of integrated cast-in-place civil defense doors cannot be disassembled. If a door is restricted in size during transportation, or if it suffers partial damage requiring repair or replacement during use, its non-separable nature often necessitates transporting or replacing the entire door. This not only increases transportation costs and difficulty, but also requires manipulation of the entire door during repairs, making the work complex and time-consuming. It may even leave the civil defense structure unprotected during repairs, posing a potential threat to personnel and material safety. These problems are prevalent in both single-leaf and double-leaf doors. Utility Model Content

[0006] To address the aforementioned shortcomings of existing technologies, this utility model provides a novel multi-ribbed air-raid shelter door, which solves the problems of transportation restrictions and complex maintenance and replacement caused by the integrated casting of existing air-raid shelter doors.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A novel multi-ribbed air-raid shelter door is provided, comprising a door frame, a door frame and a door leaf fixing assembly connected together, a door leaf panel on the door leaf fixing assembly, a ribbed assembly on the back of the door leaf panel, the ribbed assembly comprising several ribbed beams, several parallel crossbeams, several parallel secondary beams between the crossbeams, and several secondary beams perpendicular to the crossbeams. The door frame, door leaf fixing assembly, door leaf panel and ribbed assembly are detachably connected.

[0008] The beneficial effects of adopting the above technical solution are as follows: The door leaf adopts a detachable connection method, which flexibly combines the door frame, door leaf fixing components, door leaf panel, and rib components. During transportation, each component can be disassembled, reducing the space occupied and overcoming the limitations of traditional integrated door leaves on transportation tools and environments, thus reducing transportation costs and difficulties. Simultaneously, when the door leaf malfunctions or needs upgrading, there is no need for complex operations on the entire structure; only the corresponding structure needs repair or replacement, simplifying the maintenance process, improving maintenance efficiency, reducing maintenance costs, and extending the service life of the door leaf. Furthermore, the detachable connection method between the door frame and door leaf fixing components facilitates the installation and adjustment of the door leaf. During installation, the installation angle and position of the door leaf fixing components can be flexibly adjusted according to the actual size and installation location of the door frame, ensuring a close fit between the door leaf and the door frame, thereby improving sealing and stability. Moreover, when the door frame or door leaf fixing components are damaged, there is no need for large-scale disassembly of the entire door leaf. Disassembly is simple; only the damaged structure needs to be replaced, significantly shortening repair time. The dense rib assembly on the back of the door panel consists of a stable grid-like support structure composed of several parallel beams and several secondary beams perpendicular to and parallel to the beams. This greatly enhances the structural strength and deformation resistance of the door panel, evenly distributing stress and preventing localized stress concentration that could lead to door panel deformation or damage. This improves the door panel's impact resistance and service life. In addition, this structure is suitable not only for single doors but also for double doors. When used for double doors, two door panel fixing components are symmetrically arranged on the door frame, and each door panel fixing component is equipped with a door panel and a dense rib assembly.

[0009] Furthermore, the door leaf fixing assembly includes an upper door beam, a lower door beam, a left door beam, and a right door beam. The two ends of the upper door beam are connected to one end of the left door beam and the right door beam respectively through a first reinforcing plate. The two ends of the lower door beam are connected to the other end of the left door beam and the right door beam respectively through a second reinforcing plate. The upper door beam, the lower door beam, the left door beam, and the right door beam are interconnected to form a rectangular frame structure.

[0010] The beneficial effects of adopting the above technical solution are as follows: The upper, lower, left, and right door beams are interconnected to form a rectangular frame structure, which provides a stable support frame for the door panel. This effectively disperses various external forces borne by the door panel, enhances the overall structural stability and deformation resistance of the door panel, and ensures that the door panel can maintain normal opening and closing functions even in complex environments. Specifically, the two ends of the upper door beam are connected to one end of the left and right door beams via a first reinforcing plate, and the two ends of the lower door beam are connected to the other end of the left and right door beams via a second reinforcing plate. This further strengthens the connection strength of the rectangular frame structure, making the connection between the door beams more secure and effectively preventing loosening or structural damage caused by excessive local stress. At the same time, the detachable structure of the upper, lower, left, and right door beams facilitates processing and assembly. When a door beam or reinforcing plate is damaged, it can be quickly and easily replaced individually without the need for large-scale disassembly of the entire door panel fixing components or even the door panel itself. This greatly simplifies the maintenance and replacement process, reduces maintenance costs and time, and effectively solves the problem of complex maintenance and replacement.

[0011] Furthermore, several crossbeams and several sub-beams are connected by a first connecting plate.

[0012] The beneficial effects of adopting the above technical solution are as follows: the first connecting plate can combine several crossbeams and sub-beams into a stable ribbed structure, which enhances the overall strength and rigidity of the door leaf and can effectively resist external impact; and the detachable first connecting plate makes it easy to disassemble the ribbed assembly, which not only reduces space occupation, but also allows for the replacement of damaged parts individually when some crossbeams or sub-beams are damaged, without the need for overall disassembly, thus reducing maintenance difficulty and cost.

[0013] Furthermore, the two ends of several crossbeams are connected to the left and right door beams respectively through a third reinforcing plate, and one end of several sub-beams near the upper or lower door beam is connected to the upper or lower door beam through a second connecting plate.

[0014] The beneficial effects of adopting the above technical solution are as follows: the third reinforcing plate and the second connecting plate can play a stabilizing role, effectively disperse the stress borne by the crossbeam and the sub-beam, and evenly transfer it to the left door beam, right door beam, upper door beam and lower door beam, which enhances the connection stability between the ribbed assembly and the door frame structure, making the door leaf less prone to deformation when subjected to external impact.

[0015] Furthermore, several beams and sub-beams include steel-clad beams or layers of infill material.

[0016] The beneficial effects of adopting the above technical solution are as follows: When steel-clad beams are selected for several crossbeams and sub-beams, the steel-clad beams themselves have high strength and good toughness, which can provide stable and reliable mechanical support for the door leaf, ensuring that the door leaf is not easily deformed or damaged when subjected to external impact, thus ensuring the safety performance of the air-raid shelter door; when a filling material layer is used, the weight of the crossbeams or sub-beams can be significantly reduced while ensuring a certain strength, thereby achieving lightweighting of the door leaf, reducing transportation difficulty and cost, and solving the transportation restriction problem caused by the integrated casting of existing air-raid shelter doors; furthermore, whether it is the steel-clad beams or the filling material layer, it is easy to carry out targeted repairs or replacements when local damage occurs, without the need for large-scale disassembly of the entire door leaf, thereby reducing maintenance complexity and cost.

[0017] Furthermore, the cross-sectional shape of the steel cladding beam is any one or more of the following: rectangular, trapezoidal, L-shaped, T-shaped, or U-shaped.

[0018] Furthermore, the steel-clad beam is provided with a layer of filling material on its exterior, interior, or top.

[0019] Furthermore, the interior of the filling material layer is provided with circular steel bars or irregularly shaped support bars.

[0020] The beneficial effects of adopting the above technical solution are as follows: the circular steel bars can effectively constrain the lateral deformation of the filling material layer, enhance the crack resistance of the filling material layer, and make the filling material layer less prone to cracking and breakage when the door leaf is subjected to external forces, thus ensuring the stability of the door leaf structure; while the irregular support bars can better disperse and transfer stress, improve the load-bearing capacity of the filling material layer under complex stress conditions, and further enhance the impact resistance and deformation resistance of the door leaf.

[0021] Furthermore, the cross-section of the filling material layer is any one or more of a rectangle, I-shape, or T-shape, and a rectangular steel beam, circular steel bar, or irregular support bar is provided inside or at the bottom of the filling material layer.

[0022] Furthermore, the cross-section of the irregular support bar can be any one or more of the following: I-shaped, T-shaped, or L-shaped.

[0023] In summary, the beneficial effects of the multi-ribbed structure novel air-raid shelter door provided by this utility model are as follows: (1) The door leaf adopts a detachable connection method, which allows for flexible assembly of the door frame, door leaf fixing components, door leaf panel and rib components. This not only facilitates the independent processing of each component during the manufacturing process, reducing processing difficulty and cost, but also allows it to be disassembled into smaller units during transportation, greatly facilitating handling and loading / unloading, reducing transportation space occupation and transportation costs. At the same time, during installation and maintenance, individual components can be operated without the need for overall disassembly or replacement, improving installation efficiency, reducing maintenance costs, and extending the service life of the door leaf. In addition, this structure is not only suitable for single doors, but also for double doors. In double doors, both door leaves adopt the same detachable connection method, further enhancing the flexibility of installation, transportation and maintenance.

[0024] (2) The door fixing assembly in this door panel combines the upper door beam, lower door beam, left door beam, right door beam, and reinforcing plate into a stable rectangular frame structure. This not only effectively disperses the external forces borne by the door panel and enhances the overall structural strength, but also reduces the weight of the door panel, solving the problem of excessive weight caused by the integrated casting of existing civil defense doors. At the same time, the upper door beam, lower door beam, left door beam, right door beam, and reinforcing plate adopt a detachable connection method, which facilitates disassembly during transportation, reduces the space occupied, and lowers the transportation difficulty and cost. Moreover, during installation and maintenance, damaged parts can be replaced individually as needed without overall disassembly, which improves installation efficiency, reduces maintenance costs, and extends the service life of the door panel.

[0025] (3) The dense rib assembly in this door leaf forms a stable grid structure through parallel horizontal beams and vertically intersecting sub-beams, and with the detachable connection method, it effectively solves the problem of excessive weight caused by the integrated casting of existing civil defense doors. Moreover, the dense rib assembly enhances the door leaf's resistance to deformation by distributing stress to multiple support points. Furthermore, the connection plates between each horizontal beam and sub-beam enable quick assembly and disassembly, which reduces the space occupied during transportation and allows for the replacement of only the damaged horizontal beam or sub-beam in case of local damage, without the need to replace the entire door leaf. This significantly reduces maintenance costs and time, while taking into account both structural strength and lightweight requirements. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the door leaf in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the door leaf fixing assembly and the close-rib assembly in Embodiment 1 of this utility model; Figure 3 This is a schematic cross-sectional view of the closely spaced ribbed beam in Embodiment 2 of this utility model; Figure 4 This is a schematic cross-sectional view of the closely ribbed beam in Embodiment 3 of this utility model; Figure 5This is a schematic cross-sectional view of the closely ribbed beam in Embodiment 4 of this utility model; Figure 6 This is a cross-sectional structural diagram of the closely ribbed beam in Embodiments 5, 6 and 7 of this utility model; Figure 7 This is a schematic cross-sectional view of the closely ribbed beam in Embodiment 8 of this utility model; Figure 8 This is a cross-sectional structural diagram of the closely ribbed beam in Embodiments 9 and 10 of this utility model; Among them, 1. Door frame; 2. Door leaf fixing assembly; 21. Upper door beam; 22. Lower door beam; 23. Left door beam; 24. Right door beam; 25. First reinforcing plate; 26. Second reinforcing plate; 3. Door leaf panel; 4. Ribbed assembly; 41. Crossbeam; 42. Sub-beam; 43. First connecting plate; 44. Third reinforcing plate; 45. Second connecting plate; 46. Steel-clad beam; 47. Filling material layer; 48. Circular steel bar; 49. Irregular support bar; 410. Ribbed beam. Detailed Implementation

[0027] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0028] Example 1 like Figure 1 and Figure 2 As shown, the novel multi-rib structure air-raid shelter door provided by this utility model includes a door frame 1, which is connected to a door leaf fixing component 2. A door leaf panel 3 is provided on the door leaf fixing component 2, and a dense rib component 4 is provided on the back of the door leaf panel 3. The dense rib component 4 includes several dense rib beams 410, which include several parallel horizontal beams 41. Several secondary beams 42 are arranged parallel to each other between the several horizontal beams 41, and the secondary beams 42 are arranged perpendicularly to the horizontal beams 41. The door frame 1, the door leaf fixing component 2, the door leaf panel 3, and the dense rib component 4 are detachably connected, and the door frame 1, the door leaf fixing component 2, the door leaf panel 3, and the dense rib component 4 can be manufactured from metal materials, organic polymer materials, inorganic composite materials, etc.

[0029] This embodiment uses a single-leaf door as an example, but it is equally applicable to double-leaf door structures. In a double-leaf door, two door leaf fixing components 2 are symmetrically arranged on the door frame 1. Each door leaf fixing component 2 is equipped with a door leaf panel 3 and a rib assembly 4. The remaining structure is the same as that of a single-leaf door. In this embodiment, the door leaf as a whole adopts a detachable connection method, which flexibly combines the door frame 1, door leaf fixing components 2, door leaf panel 3, and rib assembly 4. During transportation, each component can be disassembled, greatly reducing the space occupied and breaking through the strict limitations of traditional integrated door leaves on transportation tools and environments, thus reducing transportation costs and difficulties. Meanwhile, when the door panel malfunctions or requires upgrades, no complex operations on the entire panel are needed; only the corresponding components need repair or replacement. This significantly simplifies the repair process, improves repair efficiency, reduces maintenance costs, and extends the door panel's lifespan. The door panel 3 is preferably, but not limited to, one or more combinations of materials such as steel plate, aluminum alloy plate, UHPC (ultra-high performance concrete), ECC (engineering cement-based reinforced composite material), fiberglass composite material, basalt composite material, or ordinary commercial concrete. The door frame 1 and the door panel fixing assembly 2 use a detachable connection method, which facilitates the installation and adjustment of the door panel. During installation, the actual dimensions of the door frame 1 and the installation... The installation angle and position of the door leaf fixing component 2 can be flexibly adjusted to ensure a close fit between the door leaf and the door frame 1, thereby improving sealing and stability. In the event of damage to the door frame 1 or the door leaf fixing component 2, it is not necessary to disassemble the entire door leaf on a large scale; only the damaged parts need to be replaced, significantly shortening the maintenance time. The dense rib component 4 set on the back of the door leaf panel 3 consists of several parallel beams 41 and several secondary beams 42 that are perpendicular to the beams 41 and parallel to each other, forming a stable grid-like support structure. This greatly enhances the structural strength and deformation resistance of the door leaf, evenly distributes stress, and avoids local stress concentration that could lead to door leaf deformation or damage, thereby improving the door leaf's impact resistance and service life.

[0030] like Figure 2As shown, the door panel fixing assembly 2 includes an upper door beam 21, a lower door beam 22, a left door beam 23, and a right door beam 24. The two ends of the upper door beam 21 are connected to one end of the left door beam 23 and the right door beam 24 respectively via a first reinforcing plate 25. The two ends of the lower door beam 22 are connected to the other ends of the left door beam 23 and the right door beam 24 respectively via a second reinforcing plate 26. The upper door beam 21, lower door beam 22, left door beam 23, and right door beam 24 are interconnected to form a rectangular frame structure. This rectangular frame structure provides a stable support frame for the door panel 3, effectively dispersing various external forces borne by the door panel, enhancing the overall structural stability and deformation resistance of the door panel, and ensuring that the door panel can maintain normal opening and closing functions even in complex environments. The upper door beam 21 is connected to one end of the left door beam 23 and the right door beam 24 via the first reinforcing plate 25 at both ends, and the lower door beam 22 is connected to the other end of the left door beam 23 and the right door beam 24 via the second reinforcing plate 26 at both ends. This further strengthens the connection strength of the rectangular frame structure, making the connection between the door beams more secure and effectively preventing loosening or structural damage caused by excessive local stress. Meanwhile, the detachable structure of the upper door beam 21, lower door beam 22, left door beam 23, and right door beam 24 facilitates processing and assembly. When a door beam or reinforcing plate is damaged, it can be quickly and easily replaced individually without requiring large-scale disassembly of the entire door leaf fixing assembly 2 or even the door leaf itself. This greatly simplifies the maintenance and replacement process, reduces maintenance costs and time, and effectively solves the problem of complex maintenance and replacement.

[0031] like Figure 2 As shown, several crossbeams 41 and several sub-beams 42 are connected by a first connecting plate 43. The two ends of several crossbeams 41 are connected to the left door beam 23 and the right door beam 24 respectively by a third reinforcing plate 44. The end of several sub-beams 42 near the upper door beam 21 or the lower door beam 22 is connected to the upper door beam 21 or the lower door beam 22 by a second connecting plate 45. The crossbeam 41 and the secondary beam 42 are connected by the first connecting plate 43, forming a stable ribbed beam 410 grid structure. This structure effectively disperses and bears various external forces on the door leaf, greatly enhancing the overall strength and deformation resistance of the door leaf. The two ends of the crossbeam 41 are connected to the left door beam 23 and the right door beam 24 by the third reinforcing plate 44, strengthening the connection between the ribbed assembly 4 and the door frame 1 structure, and improving the stability and reliability of the door leaf. At the same time, the secondary beam 42 is connected to the upper door beam 21 or the lower door beam 22 by the second connecting plate 45. This ensures the stability of the secondary beam 42 installation and facilitates the flexible disassembly of the ribbed assembly 4 of the door leaf during transportation, effectively reducing the space occupied and solving the problem of transportation constraints. Moreover, when a crossbeam 41, secondary beam 42, or connecting plate is damaged, the damaged part can be quickly located and replaced individually without the need for large-scale disassembly of the entire door leaf. This greatly simplifies the maintenance process, reduces maintenance costs and time, and effectively solves the problem of complex maintenance and replacement of existing security doors.

[0032] In this embodiment, the door leaf adopts a detachable connection method, which allows for flexible assembly of the door frame 1, door leaf fixing component 2, door leaf panel 3, and rib component 4. This not only facilitates independent processing of each component during the manufacturing process, reducing processing difficulty and cost, but also allows for disassembly into smaller units during transportation, greatly facilitating handling and loading / unloading, reducing transportation space occupation and transportation costs. Furthermore, during installation and maintenance, individual components can be operated without the need for overall disassembly or replacement, improving installation efficiency, reducing maintenance costs, and extending the service life of the door leaf.

[0033] Example 2 like Figure 3 As shown, in this embodiment, the ribbed beam 410 includes a filling material layer 47. The filling material in the filling material layer 47 can be one or more of the following: a filling material for a national defense civil defense door as described in invention patent CN117185749 A, a national defense civil defense door filling material, a national defense civil defense door and a method for preparing a national defense civil defense door; UHPC (ultra-high performance concrete); ECC (engineering cement-based reinforced composite material); fiberglass composite material; basalt composite material; ordinary commercial concrete; or polyurethane foam material. At the same time, the cross-section of the filling material layer 47 is rectangular, and several circular steel bars 48 are provided on the side away from the door panel 3. In use, the filling material layer 47 can be made of a variety of high-quality materials. These materials have high strength, good toughness and impact resistance, which can significantly enhance the load-bearing capacity of the ribbed beam 410, so that it can effectively disperse and absorb energy when subjected to complex external forces such as explosion impact and earthquake, and protect the overall structure of the door from damage. Meanwhile, the filling material layer 47 can reduce the weight of the steel beam 46 itself, achieve lightweight door leaf, reduce transportation difficulty, and solve transportation restriction problems; while the circular steel bars 48 set inside the filling material layer 47 further improve the stability and crack resistance of the ribbed beam 410. When local stress occurs, it can effectively restrain the deformation of the filling material, prevent cracks from occurring and spreading, and extend the service life of the door leaf.

[0034] Example 3 like Figure 4As shown, the ribbed beam 410 in this embodiment includes a filling material layer 47. The cross-sectional shape of the filling material layer 47 is I-shaped or T-shaped. The filling material in this composite material layer can be one or more of the following: a filling material for a national defense civil defense door, a national defense civil defense door and a method for preparing a national defense civil defense door, UHPC (ultra-high performance concrete), ECC (cement-based reinforced composite material for engineering), fiberglass composite material, basalt composite material, ordinary commercial concrete, or polyurethane foam material. At the same time, a number of circular steel bars 48 are provided on the side of the filling material layer 47 away from the door panel 3. The filling material layer 47 adopts an I-shaped or T-shaped cross-section, and the number of circular steel bars 48 provided on the side away from the door panel 3 greatly improves the performance. At the same time, the I-shaped or T-shaped cross-section enables the filling material layer 47 to effectively disperse and bear stress from different directions, enhance the bending and shear resistance of the ribbed beam 410, and thus improve the overall stability and impact resistance of the door.

[0035] Example 4 like Figure 5 As shown, the ribbed beam 410 in this embodiment includes a steel-clad beam 46, which is connected to the door panel 3. The cross-section of the steel-clad beam 46 is rectangular or trapezoidal, and a filling material layer 47 is provided inside the rectangular or trapezoidal cross-section steel-clad beam 46. The filling material in this composite material layer can be selected from the invention patent CN 117185749. A. A method for preparing a national defense civil defense door filling material, a national defense civil defense door, and a national defense civil defense door preparation method. The national defense civil defense door filling material includes one or more of the following: UHPC (ultra-high performance concrete), ECC (engineering cement-based reinforced composite material), fiberglass composite material, basalt composite material, ordinary commercial concrete, or polyurethane foam material. At the same time, several circular steel bars 48 are provided on the side of the filling material layer 47 away from the door panel 3. The rectangular cross-section steel-clad beam 46 can ensure the basic mechanical properties of the crossbeam 41 or the sub-beam 42, provide a stable support frame for the door leaf, and facilitate precise connection and installation with other components. The inclined side of the trapezoidal cross-section steel-clad beam 46 can effectively disperse stress, and can transmit the force more evenly to the entire structure when subjected to external force, enhancing the deformation resistance and impact resistance of the ribbed beam 410. Furthermore, through the synergistic use of the rectangular and trapezoidal cross-section steel-clad beams 46, the strength requirements of the door leaf under different stress scenarios can be met, and the door leaf can be lightweight by reducing the amount of material used.

[0036] Example 5 like Figure 6As shown, the ribbed beam 410 in this embodiment includes a filling material layer 47 with a rectangular cross-sectional shape. A rectangular steel-clad beam 46 is disposed inside the filling material layer 47. The filling material in this composite material layer can be one or more of the following: filling material for a national defense civil defense door as described in invention patent CN 117185749 A (a method for preparing a national defense civil defense door), UHPC (ultra-high performance concrete), ECC (engineering cement-based reinforced composite material), fiberglass composite material, basalt composite material, ordinary commercial concrete, or polyurethane foam material. The filling material layer 47 has a rectangular cross-section and an internal rectangular steel-clad beam 46. The rectangular cross-section makes the filling material layer 47 structurally regular, facilitating processing and installation, and enabling it to stably bear the external forces on the door leaf. The rectangular steel-clad beam 46 inside the filling material layer 47 enhances the overall strength and rigidity of the filling material layer 47, effectively constrains the deformation of the filling material, improves its impact and bending resistance, and ensures that the door leaf maintains structural integrity even under extreme conditions.

[0037] Example 6 like Figure 6 As shown, the ribbed beam 410 in this embodiment includes a filling material layer 47 with a rectangular cross-sectional shape. A rectangular steel-clad beam 46 is disposed inside the filling material layer 47, and the filling material layer 47 is disposed inside the rectangular steel-clad beam 46. The filling materials in both filling material layers 47 can be one or more of the following: filling material for a national defense civil defense door as described in invention patent CN 117185749 A (a filling material for a national defense civil defense door, a national defense civil defense door, and a method for preparing a national defense civil defense door); UHPC (ultra-high performance concrete); ECC (engineering cement-based reinforced composite material); fiberglass composite material; basalt composite material; ordinary commercial concrete; or polyurethane foam material. By further setting a filling material layer 47 inside the rectangle, the double filling material layer 47 structure further optimizes the mechanical properties and allows for the use of different filling materials in combination, flexibly adjusting performance parameters according to actual needs. Simultaneously, the selection of multiple filling materials achieves lightweight door leaf design.

[0038] Example 7 like Figure 6As shown, the ribbed beam 410 in this embodiment includes a filling material layer 47 with a rectangular cross-section. The filling material layer 47 has an internal irregularly shaped support rib 49 with an I-shaped cross-section. The filling material in this composite material layer can be one or more of the following: UHPC (ultra-high performance concrete), ECC (engineering cement-based reinforced composite material), fiberglass composite material, basalt composite material, ordinary commercial concrete, or polyurethane foam material, as described in invention patent CN 117185749 A (a filling material for a national defense civil defense door, a national defense civil defense door, and a method for preparing a national defense civil defense door); Basalt composite material, basalt composite material, ordinary commercial concrete, or polyurethane foam material. The upper and lower flanges and web structure of the I-shaped cross-section irregularly shaped support rib 49 inside the filling material layer 47 can efficiently disperse stress, greatly enhancing the bending and shear resistance of the filling material layer 47, improving the overall strength and stiffness of the ribbed beam 410, effectively resisting external impacts such as explosions and earthquakes, and ensuring the safety of the door structure.

[0039] Example 8 like Figure 7 As shown, the ribbed beam 410 in this embodiment includes a filling material layer 47 with a rectangular cross-sectional shape. The lower part of the filling material layer 47 is provided with irregularly shaped support ribs 49 with I-shaped, L-shaped, or rectangular cross-sections. The filling material within the composite material layer can be selected from the invention patent CN 117185749. A. A method for preparing a national defense civil defense door, comprising a filling material for a national defense civil defense door, a national defense civil defense door, and a national defense civil defense door preparation method, including one or more of the following: UHPC (ultra-high performance concrete), ECC (engineering cement-based reinforced composite material), fiberglass composite material, basalt composite material, ordinary commercial concrete, or polyurethane foam material; In use, the upper and lower flanges and web structure of the I-shaped cross-section irregular support ribs 49 can effectively disperse the stress in the vertical and horizontal directions, greatly enhancing the bending and shear resistance of the closely ribbed beam 410, so that the door leaf can better maintain structural integrity when subjected to external impact, and is less prone to bending deformation or breakage; the L-shaped cross-section irregular support ribs 49 can improve the local torsional and shear resistance of the closely ribbed beam 410, enhancing the stability of the local structure when the door leaf is subjected to complex external forces, and preventing damage due to excessive local stress; the rectangular cross-section irregular support ribs 49 further strengthen the overall stability of the closely ribbed beam 410.

[0040] Example 9 like Figure 8 As shown, the ribbed beam 410 in this embodiment includes a steel-clad beam 46, which is connected to the door panel 3. The cross-section of the steel-clad beam 46 is L-shaped. The L-shaped steel-clad beam 46 has a simpler structure, which reduces the amount of material used while meeting the basic support requirements of the door, thus helping to achieve lightweighting of the door.

[0041] Example 10 like Figure 8 As shown, the ribbed beam 410 in this embodiment includes a steel-clad beam 46, which is connected to the door panel 3. The cross-section of the steel-clad beam 46 is trapezoidal, and a filling material layer 47 is provided inside the trapezoidal steel-clad beam 46. The filling material in the filling material layer 47 can be selected from the invention patent CN 117185749. A method for preparing a national defense civil defense door includes a filling material, a national defense civil defense door, and a national defense civil defense door filling material, which may be one or more of the following: UHPC (ultra-high performance concrete), ECC (engineering cement-based reinforced composite material), fiberglass composite material, basalt composite material, ordinary commercial concrete, or polyurethane foam material; and the trapezoidal steel cladding beam 46 is internally provided with T-shaped cross-section irregular support ribs 49; the trapezoidal cross-section steel cladding beam 46 is connected to the door panel 3, and the hypotenuse of the trapezoidal structure can effectively disperse the stress on the door panel while ensuring structural strength, and can reduce material usage, achieve door panel lightweighting, and reduce transportation difficulty and cost; at the same time, the T-shaped cross-section irregular support ribs 49 provided inside the trapezoidal steel cladding beam 46 can effectively enhance the bending and shear resistance of the steel cladding beam 46, improve the overall strength and stiffness of the ribbed beam 410, and make the door panel less prone to deformation and damage when subjected to external impact.

[0042] In summary, the multi-rib structure of this novel civil defense door, with its detachable connection method, allows for flexible assembly of the door frame 1, door leaf fixing component 2, door leaf panel 3, and dense rib component 4. This not only facilitates independent processing of each component during manufacturing, reducing processing difficulty and cost, but also allows for disassembly into smaller units during transportation, greatly simplifying handling and loading / unloading, reducing transportation space occupation and costs. Furthermore, during installation and maintenance, individual components can be operated without overall disassembly or replacement, improving installation efficiency, reducing maintenance costs, and extending the door's service life.

Claims

1. A novel multi-ribbed air-raid shelter door, characterized in that: The system includes a door frame (1), which is connected to a door leaf fixing assembly (2). The door leaf fixing assembly (2) is provided with a door leaf panel (3). A rib assembly (4) is provided on the back of the door leaf panel (3). The rib assembly (4) includes several rib beams (410). The several rib beams (410) include several parallel crossbeams (41). Several parallel secondary beams (42) are provided between the several crossbeams (41). The several secondary beams (42) are perpendicular to the crossbeams (41). The door frame (1), the door leaf fixing assembly (2), the door leaf panel (3), and the rib assembly (4) are detachably connected.

2. The novel multi-ribbed air-raid shelter door leaf according to claim 1, characterized in that: The door fixing assembly (2) includes an upper door beam (21), a lower door beam (22), a left door beam (23), and a right door beam (24). The two ends of the upper door beam (21) are connected to one end of the left door beam (23) and the right door beam (24) respectively through a first reinforcing plate (25). The two ends of the lower door beam (22) are connected to the other end of the left door beam (23) and the right door beam (24) respectively through a second reinforcing plate (26). The upper door beam (21), lower door beam (22), left door beam (23), and right door beam (24) are interconnected to form a rectangular frame structure.

3. The novel multi-ribbed air-raid shelter door leaf according to claim 1, characterized in that: The crossbeams (41) and the sub-beams (42) are connected by a first connecting plate (43).

4. The novel multi-ribbed air-raid shelter door leaf according to claim 1, characterized in that: The two ends of several of the crossbeams (41) are connected to the left door beam (23) and the right door beam (24) respectively through the third reinforcing plate (44), and the ends of several of the sub-beams (42) near the upper door beam (21) or the lower door beam (22) are connected to the upper door beam (21) or the lower door beam (22) through the second connecting plate (45).

5. The novel multi-ribbed air-raid shelter door leaf according to claim 1, characterized in that: Some of the beams (41) and sub-beams (42) include steel-clad beams (46) or infill material layers (47).

6. The novel multi-ribbed air-raid shelter door leaf according to claim 5, characterized in that: The cross-sectional shape of the steel cladding beam (46) is any one or more of the following: rectangular, trapezoidal, L-shaped, T-shaped, or U-shaped.

7. The novel multi-ribbed air-raid shelter door leaf according to claim 6, characterized in that: The steel-clad beam (46) is provided with a layer of filling material (47) on its exterior, interior or top.

8. The novel multi-ribbed air-raid shelter door leaf according to claim 7, characterized in that: The interior of the filling material layer (47) is provided with circular steel bars (48) or irregular support bars (49).

9. The novel multi-ribbed air-raid shelter door leaf according to claim 5, characterized in that: The cross-section of the filling material layer (47) is any one or more of a rectangle, I-shape or T-shape, and the interior or lower part of the filling material layer (47) is provided with a rectangular steel beam (46), a circular steel bar (48) or an irregular support bar (49).

10. The novel multi-ribbed air-raid shelter door leaf according to claim 8 or 9, characterized in that: The cross-section of the irregular support bar (49) is any one or more of the following: I-shaped, T-shaped, or L-shaped.

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