Electric threshold-free double-leaf light civil air defense door

Abstract

An electric threshold-free double-leaf light civil air defense door belongs to the related technical field of civil air defense equipment, and comprises a door frame which comprises a top beam, a side edge beam and a bottom plate; the number of the door leaves is two, and after the door leaves are closed, the door leaves can abut against the top beam and the side beams to form an airtight matching structure; the door lock system comprises a door lock driving assembly and a sealing beam which is in power connection with the door lock driving assembly, a first sealing rubber strip which is in sliding airtight fit with the door leaf is arranged on one side of the sealing beam, and a second sealing rubber strip which can abut against the bottom plate and form an airtight fit structure is arranged on the bottom face of the sealing beam. The doorsill-free structural design is adopted, the sealing beam structure is matched, the first sealing rubber strip and the second sealing rubber strip are arranged on the sealing beam, the airtightness of door leaf closing under the doorsill-free structure can be achieved, the doorsill-free structural design is reasonable, the airtightness is excellent, and more importantly, personnel and equipment can pass through the doorsill-free structural design more conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field related to civil air defense equipment, and more specifically, to an electric threshold-free double-leaf lightweight civil air defense door. Background Art

[0002] Air-raid doors are common in civil air defense projects. In existing technology, they are generally small, typically consisting of single-leaf steel doors. Generally, the airtightness of air-raid doors is determined by the seal between the door leaf and the door frame. Specifically, the door frame is fixed to the concrete doorway. When the single-leaf door leaf is closed, one side of the leaf contacts the top beam, side panels, and threshold of the door frame. Sealing strips are installed at these contact points, ensuring airtightness when the door is closed.

[0003] While traditional civil air defense doors can achieve a certain degree of impact resistance and maintain a certain degree of airtightness, they still have significant technical flaws. For example, they require a threshold structure, which can obstruct water flow, create a tripping hazard, and complicate vehicle access. Furthermore, traditional civil air defense doors are undersized. If their dimensions were increased, while also considering their structural strength, the weight of the door leaf would increase significantly, reducing its sealing performance and increasing the difficulty of opening and closing. Summary of the Invention

[0004] (1) Technical issues In summary, how to solve the problem of heavy door leaf and difficult to ensure airtightness in the prior art flood-proof doors has become an urgent problem to be solved by those skilled in the art.

[0005] (2) Technical solution In order to achieve the above object, the present invention provides the following technical solutions: The present invention provides an electric threshold-free double-leaf lightweight civil air defense door. In the present invention, the electric threshold-free double-leaf lightweight civil air defense door comprises: A door frame, comprising a top beam, side beams, and a bottom plate, wherein the top beam and the side beams form an inverted U-shaped structure, and the bottom plate is disposed on the ground and remains flush with the ground; The door leaf is provided with two, and the two door leaves are of a split structure. The door leaf is hinged to the door frame, and when the door leaf is closed, it can abut against the top beam and the side beam to form an airtight matching structure; A door lock system, comprising a door lock drive assembly and a sealing beam dynamically connected to the door lock drive assembly, wherein a first sealing strip is provided on one side of the sealing beam to form a sliding airtight fit with the door leaf, and a second sealing strip is provided on the bottom surface of the sealing beam to abut against the bottom plate to form an airtight fit structure; The door lock system also includes a door bolt that is dynamically connected to the door lock drive assembly, and a door lock box that cooperates with the door bolt is provided on the door frame.

[0006] Preferably, in the electric threshold-less double-leaf lightweight civil defense door provided by the present invention, a door leaf driving device for driving the door leaf to close or open is provided on the door leaf, and the door leaf driving device is an electric device.

[0007] Preferably, in the electric threshold-less double-leaf lightweight civil defense door provided by the present invention, the length of the first sealing strip and the second sealing strip is the same as the length of the sealing beam, and the first sealing strip and the second sealing strip are arranged along the length direction of the sealing beam.

[0008] Preferably, in the electric threshold-less double-leaf lightweight civil defense door provided by the present invention, the door bolt is provided on the bottom surface of the sealing beam, and the second sealing strip is provided on the bottom surface of the sealing beam and on the front and rear sides of the door bolt.

[0009] Preferably, in the electric threshold-less double-leaf lightweight civil defense door provided by the present invention, a slot structure is provided on the sealing beam, and the first sealing strip and the second sealing strip are both clamped in the slot structure.

[0010] Preferably, in the electric threshold-less double-leaf lightweight civil defense door provided by the present invention, the door lock drive assembly includes a handwheel for realizing manual control of the door lock system, and a drive motor is connected to the handwheel through a transmission system. The drive motor drives the handwheel to move through the transmission system to realize electric control of the door lock system.

[0011] Preferably, in the electric threshold-less double-leaf lightweight civil defense door provided by the present invention, the door bolt is provided near the top edge of the door leaf, and the door lock drive assembly is connected to all the door bolts through a multi-link system to achieve synchronous linkage of all the door bolts.

[0012] Preferably, in the electric threshold-less double-leaf lightweight civil defense door provided by the present invention, the first sealing strip includes a clamping body with a rectangular cross-section and a smooth curved surface portion arranged on the clamping body; the first sealing strip has the same structure as the second sealing strip.

[0013] Preferably, in the electric threshold-free double-leaf lightweight civil defense door provided by the present invention, the door leaf includes a door leaf inner core, and the door leaf inner core includes an inner core unit, and the diameters of the two ends of the inner core unit are different from the diameter of the middle section; the inner core unit is a dumbbell-shaped structure or a shuttle-shaped structure, and the cross-section of the inner core unit is a regular hexagonal structure.

[0014] Preferably, in the electric threshold-less double-leaf lightweight civil defense door provided by the present invention, the inner core units are arranged according to a matrix rule and form the inner core of the door leaf.

[0015] (3) Beneficial effects From the above, it can be seen that the present invention provides an electric threshold-free double-leaf lightweight civil defense door, including: a door frame, the door frame includes a top beam, side beams and a bottom plate, the top beam and the side beams form an inverted U-shaped structure, and the bottom plate is arranged on the ground and kept flush with the ground; a door leaf, two door leaves are provided, and the two door leaves are a double-leaf structure. The door leaves are hinged to the door frame, and after the door leaves are closed, they can be abutted against the top beam and the side beams to form an airtight matching structure; a door lock system, the door lock system includes a door lock drive assembly and a sealing beam dynamically connected to the door lock drive assembly, a first sealing strip is provided on one side of the sealing beam to form a sliding airtight matching with the door leaf, and a second sealing strip is provided on the bottom surface of the sealing beam to abut against the bottom plate to form an airtight matching structure; the door lock system also includes a door bolt dynamically connected to the door lock drive assembly, and a door lock box is provided on the door frame to cooperate with the door bolt. Furthermore, the door leaf includes a door leaf inner core, and the door leaf inner core includes an inner core unit, and the diameters of the two ends of the inner core unit are different from the diameter of the middle section; the inner core unit is a dumbbell-shaped structure or a shuttle-shaped structure, and the cross-section of the inner core unit is a regular hexagonal structure.

[0016] In the present invention, the inner core of the door body adopts a special structural design. The inclined section structure provided therein can increase the wall thickness of the inner core monomer in the projection direction along its axial direction. When the inner core of the door body is subjected to force, it will deform in the shear direction. In this way, a large amount of impact energy is absorbed by the deformation of the inner core of the door body, which can ensure that the entire door body will not undergo significant deformation (or even no deformation). At the same time, the deformation of the inner core of the door body causes the front panel, rear panel and door edge of the door body to bear the impact force, and the remaining small amount of impact energy is evenly distributed among the various parts of the door body, thus ensuring the impact resistance of the door body. Through the above-mentioned structural design, the present invention solves the problem of the heavy weight of the door body in the prior art flood-proof doors.

[0017] In the present invention, a threshold-free structural design is adopted, and in combination with a sealing beam structure, a first sealing strip and a second sealing strip are arranged on the sealing beam, which can achieve the airtightness of the door leaf closed under the threshold-free structure. The structural design of the present invention is reasonable and the sealing performance is excellent. More importantly, the threshold-free structural design is more convenient for the passage of personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings and the accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. Among them: Figure 1Schematic diagram of the structure of an electric threshold-free double-leaf lightweight civil air defense door in an embodiment of the present invention; Figure 2 2. A schematic side view of the structure of an electric threshold-free double-leaf lightweight civil air defense door according to an embodiment of the present invention; Figure 3 for Figure 2 A magnified schematic diagram of the structure at the center circle A; Figure 4 This is a schematic structural diagram of the inner core of the door body according to an embodiment of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of the structure at the middle circle B; Figure 6 Schematic diagram of the structure of the door leaf drive device in an embodiment of the present invention.

[0019] In the present invention, Figures 1 to 6 The corresponding relationship between the component names and the reference numerals is as follows: Top beam 1, side beam 2, bottom plate 3, door leaf 4, sealing beam 5, first sealing strip 6, second sealing strip 7, door bolt 8, hand wheel 9, drive motor 10, door leaf inner core 11, inner core unit 12, door leaf drive device 13, door leaf mounting base 14, push rod 15, opening and closing cylinder 16, door leaf opening and closing servo motor 17, fixed base 18, upper end structure 19, middle section structure 20, lower end structure 21. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention rather than limitation thereof.

[0021] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0022] Please refer to Figures 1 to 6 .

[0023] The present invention provides an electric double - leaf lightweight air - defense door without a threshold. In the present invention, this electric double - leaf lightweight air - defense door adopts a double - door - leaf structure design. The double - door - leaf is of a平开 and double - opening structure design, which is suitable for the installation requirements of large - size openings in air - defense projects. Moreover, the opening and closing of the door leaf 4 adopt an electric drive mode, which simplifies the structure of the drive system of the air - defense door. In addition, the air - defense door provided by the present invention is of a structure design without a threshold, which is convenient for the passage of personnel and vehicles.

[0024] The electric double - leaf lightweight air - defense door provided by the present invention includes a door frame, a door leaf 4, and a door lock system. The door frame is used to be installed on the opening structure, and the door leaf 4 is installed on the door frame through a hinge assembly. And through the structural design of the door frame and the door leaf 4, airtight cooperation between the door leaf 4 and the door frame can be achieved when the door leaf 4 is closed. The door lock system is not only used for locking after the door leaf 4 is closed, but also has the function of realizing the airtight cooperation between the door leaf 4 and the door frame.

[0025] In the specific embodiment of the present invention, the specific structures of the door frame, the door leaf 4, and the door lock system are as follows.

[0026] 1. The structural design of the door frame is as follows.

[0027] The door frame includes a top beam 1, side beams 2, and a bottom plate 3. The top beam 1 and the side beams 2 are both designed with square steel pipes or I - beam structures, and the bottom plate 3 is assembled by multiple metal profiles. During installation, the top beam 1 and the side beams 2 form an inverted U - shaped structure, and it is necessary to ensure that the side towards the door leaf 4 of the top beam 1 and the side beams 2 is in the same vertical plane. After the door leaf 4 is closed, the pressure exerted on the top beam 1 and the side beams 2 by the door leaf 4 is the same. The bottom plate 3 is set on the ground and flush with the ground, thus realizing the structure design without a door frame. At the same time, both ends of the bottom plate 3 are assembled with the bottom ends of the side beams 2 (the fixed installation between the bottom plate 3 and the side beams 2 can be achieved by using an L - shaped component or a flange structure and fastening with bolts). There are lower docking structures at both ends of the top beam 1. The cross - sectional shape of the lower docking structure is the same as the cross - sectional shape of the top of the side beam 2. The lower docking structure is docked with the top of the side beam 2 and fixed through a flange structure or by welding. After the top beam 1 and the side beams 2 form an inverted U - shaped structure and then the bottom plate 3 is set, the top beam 1, the side beams 2, and the bottom plate 3 form a complete "mouth" - shaped door - frame structure. The door frame can be set on the air - defense project opening structure by using conventional technical means in existing projects, such as fixing with expansion bolts.

[0028] For the bottom plate 3, it can be of a "T" - shaped structure (i.e., a steel section with a T - shaped cross - section), or it can be assembled into a "T" - shaped structure by two "L" - shaped metal components.

[0029] 2. The structural design of the door leaf 4 is as follows.

[0030] First, the present invention is designed with two door leaves 4 to accommodate large-sized opening structures. The two door leaves 4 are a biparting structure, and the door leaves 4 are hinged to the door frame. When the door leaves 4 are closed, they can abut against the top beam 1 and the side beams 2 to form an airtight matching structure.

[0031] The door leaf 4 is hinged to the door frame through a hinge assembly. The hinge assembly includes a door frame mounting plate, a door leaf mounting plate and a hinge plate. A hinge platform is provided on the door frame mounting plate and the door leaf mounting plate (the hinge platform is composed of two parallel and spaced hinge plates). The hinge plate is installed on the door frame mounting plate and the door leaf mounting plate through a hinge shaft. For one door leaf 4, the present invention is installed on the door frame through at least three hinge assemblies. Furthermore, the present invention can increase the number of hinge assemblies on the upper and lower sides of the door leaf 4, and by designing the lateral setting position of the hinge assembly (relative to the hinge assembly set in the middle, the upper hinge assembly is laterally away from the door leaf 4, and the lower hinge assembly is laterally close to the door leaf 4), the effect of "pulling" upwards and "pushing" downwards is achieved, so that the door leaf 4 maintains structural stability.

[0032] The door leaf 4 includes a door leaf inner core 11, which includes inner core units 12. The diameters of the inner core units 12 at both ends differ from the diameter of the middle section. The inner core units 12 are dumbbell-shaped or shuttle-shaped, and the cross-section of the inner core units 12 is a regular hexagonal structure. Furthermore, the inner core units 12 are arranged in a matrix to form the door leaf inner core 11.

[0033] The present invention can reduce the size of a single door leaf 4 by designing the door leaf 4 into two leaves, thereby achieving the purpose of lightening the door leaf 4. In addition, the present invention also performs other structural optimizations on the door leaf 4, that is, designs the inner core unit 12 into a honeycomb structure. Specifically, for the further lightweight design of the door leaf 4, the present invention adopts the following concept: the door leaf 4 includes a front panel, a door leaf inner core 11 and a rear panel, wherein the front panel is a flat panel structure, the rear panel is a flat panel structure, the front panel is brazed to the door leaf inner core 11, and the rear panel is brazed to the door leaf inner core 11. By providing the door leaf inner core 11, the overall mass of the door leaf 4 is reduced to the greatest extent while ensuring the impact resistance of the door leaf 4. The door leaf inner core 11 is composed of a plurality of inner core units 12 evenly distributed. The inner core unit 12 includes an upper end structure 19, a middle section structure 20 and a lower end structure 21. The upper end structure 19 and the lower end structure 21 are hexagonal cylindrical structures with the same diameter and coaxially arranged. The two ends of the middle section structure 20 include at least transition bevels inclined relative to the axis of the inner core unit 12 for bearing shear force. The diameter of the middle section structure 20 is smaller than the diameters of the upper end structure 19 and the lower end structure 21. The middle section structure 20 is coaxially arranged with the upper end structure 19 and the lower end structure 21. The middle section structure 20 is a hexagonal cylindrical structure. The inner core unit 12 is provided with a transition bevel, and the inclination angle of the transition bevel relative to the axis of the inner core unit 12 is in the range of 45°-60°. The provision of the transition bevel not only enables the entire inner core unit 12 to have a frontal impact resistance capability (when the door leaf 4 is closed, the impact force facing the door leaf 4 or perpendicular to the direction of the door leaf 4 is a frontal impact force, and the ability to resist the frontal impact force is the frontal impact resistance capability), but also has a certain deformation capability in the shear direction (in the direction perpendicular to the frontal impact force), and this deformation capability is the shear resistance capability. Through the above-mentioned structural design, when the door leaf 4 is subjected to a large instantaneous shock wave (the impact force generated by the shock wave is greater than the designed impact resistance of the door leaf 4), the entire middle section structure 20 in the door leaf inner core 11 will be deformed in the shear direction under the force. In this way, a large amount of impact energy is absorbed by the deformation of the door leaf inner core 11, ensuring that the entire door leaf 4 will not undergo a large deformation (or even no deformation). At the same time, the deformation of the door leaf inner core 11 causes the front panel, rear panel and door edge of the door leaf 4 to withstand the impact force, and the remaining small amount of impact energy is evenly distributed among the various parts of the door leaf 4. The cross-section of the inner core unit 12 provided by the present invention is a regular hexagonal structure. This variable-section honeycomb structure can ensure the impact resistance of the door leaf 4 and also achieve lightweighting of the door leaf 4.

[0034] 3. The structural design of the door lock system is as follows.

[0035] The door lock system includes a door lock drive assembly and a sealing beam 5, which is dynamically connected to the door lock drive assembly. The sealing beam 5 is preferably a rectangular steel tube. A first sealing strip 6 is installed on one side of the sealing beam 5 (the side facing the door leaf 4). The first sealing strip 6 forms a sliding, airtight fit with the door leaf 4. A second sealing strip 7 is installed on the bottom surface of the sealing beam 5, which abuts against the bottom plate 3 to form an airtight fit. As the sealing beam 5 moves up and down, the first sealing strip 6 maintains sliding contact with the surface of the door leaf 4. Furthermore, within the sliding range of the door leaf 4 corresponding to the first sealing strip 6, the design features a smooth concave top and a smooth convex bottom, flush with the main surface of the door leaf 4. This reduces the distance between the first sealing strip 6 and the door leaf 4, minimizing sliding wear on the first sealing strip 6. The second sealing strip 7 is installed on the bottom surface of the sealing beam 5. After the sealing beam 5 slides down, it presses against the bottom plate 3, forming an airtight fit with the bottom plate 3. The first sealing strip and the second sealing strip are arranged on the sealing beam 5 and are parallel to the axis of the sealing beam 5. The length of the first sealing strip 6 and the second sealing strip 7 is the same as that of the sealing beam 5, and the first sealing strip 6 and the second sealing strip 7 are arranged along the length direction of the sealing beam 5. The first sealing strip 6 and the second sealing strip 7 have the same structure. Taking the structure of the first sealing strip 6 as an example: the first sealing strip 6 includes a clamping body with a rectangular cross-section and a smooth curved surface portion provided on the clamping body. The first sealing strip 6 is an integrated structure and is made of rubber material.

[0036] Regarding the installation of the sealing strips, the present invention provides a slot structure on the sealing beam 5 , and both the first sealing strip 6 and the second sealing strip 7 are mounted in the slot structure.

[0037] The sealing beam 5 has two functions: one is to achieve a sealed connection with the bottom plate 3, and the other is to achieve locking of the bottom of the door leaf 4. The present invention achieves the first function by providing a first sealing strip 6 and a second sealing strip 7. The second function is achieved by providing a bottom door bolt 8 on the sealing beam 5, a door bolt 8 on the bottom surface of the sealing beam 5, and second sealing strips 7 on the bottom surface of the sealing beam 5, both in front of and behind the door bolt 8.

[0038] The door lock system also includes a bolt 8, which is power-connected to the door lock drive assembly. A door lock box is mounted on the door frame and mates with bolt 8. Specifically, the door lock drive assembly includes a handwheel 9, which is used to manually control the door lock system. Handwheel 9 is provided with a handwheel shaft, which is rotatably mounted on the door leaf 4. Handwheel 9 can be used to drive the handwheel shaft, thereby achieving manual actuation. A drive motor 10 is power-connected to handwheel 9 via a transmission system (which can be a gear, chain, or belt drive system). This drive motor 10 drives handwheel 9 through the transmission system, thereby electrically actuating the door lock system.

[0039] Specifically, the door lock system includes a door lock drive, which includes a handwheel shaft and a linkage plate. The handwheel shaft outputs rotational motion and drives the linkage plate to move linearly via a worm gear mechanism. The door lock system also includes a top bolt assembly and a middle bolt assembly. The structures of each bolt assembly are similar. The bolt assembly includes a boomerang-shaped bolt body hinged to the panel of the door leaf 4. One arm of the bolt body functions as a "bolt," while the other arm serves as a connection. The linkage plate is connected to the top bolt assembly and the middle bolt assembly via a connecting rod. The linkage plate drives the bolt body to rotate within a certain angle range via the connecting rod. The arm of the bolt body cooperates with the door lock box to achieve locking or opening. The door lock box is a component of the door lock system, installed on the door frame or another door leaf 4, and can cooperate with the arm of the bolt body to form a locking structure. The sealing beam 5 is connected to the linkage plate through a connecting rod system. At the same time, the present invention also provides a limiting structure for limiting the up and down movement of the sealing beam 5. The sealing beam 5 can be linked with each door bolt assembly to synchronously complete the locking or opening of the door leaf 4 and achieve bottom sealing when the door leaf 4 is locked.

[0040] A door leaf driving device 13 is provided on the door leaf 4 for driving the door leaf 4 to close or open. The door leaf driving device 13 is an electric device, such as an electric motor. The electric motor is connected to the handwheel shaft through a transmission system, thereby driving the rotation of the handwheel shaft and further driving the movement of the linkage plate.

[0041] In a preferred embodiment of the present invention, the present invention only provides a door bolt assembly near the top edge of the door leaf 4 (no middle door bolt assembly is provided), and the door lock drive assembly is connected to all the door bolts 8 through a multi-link system to achieve synchronous linkage of all the door bolts 8.

[0042] The structure of the door leaf drive device 13 is as follows, including: a door leaf mounting base 14, a push rod 15, an opening and closing cylinder 16, a door leaf opening and closing servo motor 17, and a fixed base 18. The door leaf mounting base 14 is fixedly set on the door leaf 4, preferably in the middle position in the height direction of the door leaf 4. The fixed base 18 is set on the entrance structure of the civil air defense project. The opening and closing cylinder 16 is hinged on the door leaf mounting base 14, and the push rod 15 is slidably set on the opening and closing cylinder 16. One end of the push rod 15 is located inside the opening and closing cylinder 16, and the other end of the push rod 15 is located outside the opening and closing cylinder 16 and is hinged to the fixed base 18. The door leaf opening and closing servo motor 17 is a motor and a reducer assembly structure. The door leaf opening and closing servo motor 17 has a power output shaft. The door leaf opening and closing servo motor 17 is installed on the door leaf mounting base 14. The power output shaft is rotatably set in the opening and closing cylinder body 16. The power output shaft is keyed to a driving gear, and the driving gear is engaged with the rack structure provided on the push rod 15. This can drive the push rod 15 to move in the opening and closing cylinder body 16. The change in the overall length between the push rod 15 and the opening and closing cylinder body 16 can realize the rotation of the door leaf 4 (opening or closing the door leaf 4).

[0043] As can be seen from the above, the present invention provides an electric threshold-free double-leaf lightweight civil air defense door. In the present invention, the electric threshold-free double-leaf lightweight civil air defense door includes: a door frame, the door frame includes a top beam 1, a side beam 2 and a bottom plate 3, the top beam 1 and the side beam 2 form an inverted U-shaped structure, the bottom plate 3 is arranged on the ground and kept flush with the ground; a door leaf 4, the door leaf 4 is provided with two, the two door leaves 4 are a split-type structure, the door leaf 4 is hinged to the door frame, and the door leaf 4 can be against the top beam 1 and the side beam 2 after closing and forming an airtight fitting structure; the door lock system includes a door lock drive assembly and a sealing beam 5 that is dynamically connected to the door lock drive assembly. A first sealing strip 6 is provided on one side of the sealing beam 5 to form a sliding airtight fit with the door leaf 4. A second sealing strip 7 is provided on the bottom surface of the sealing beam 5 to abut against the bottom plate 3 and form an airtight fitting structure; the door lock system also includes a door bolt 8 that is dynamically connected to the door lock drive assembly, and a door lock box that cooperates with the door bolt 8 is provided on the door frame. Furthermore, the door leaf 4 includes a door leaf inner core 11, which includes an inner core unit 12. The diameters of the two ends of the inner core unit 12 are different from the diameter of its middle section. The inner core unit 12 is a dumbbell-shaped structure or a shuttle-shaped structure, and the cross-section of the inner core unit 12 is a regular hexagonal structure.

[0044] In the present invention, the door leaf 4 employs a composite sandwich structure, comprising a front panel (outer skin), a rear panel (inner skin), and a door leaf core 11. The outer skin is 4mm thick, made of 7A04-T6 aviation aluminum with a Vickers hardness of 2150HV. A transition layer is provided between the outer skin and the door leaf core 11 to provide impact cushioning. The transition layer is 2mm thick, made of aramid fiber / epoxy resin prepreg with a surface density of 480g / m2.2 . The door leaf core 11 is a 5056 aluminum structure, and the size of the core monomer is Ф6mm*50mm (6mm in diameter, 50mm in height). The inner skin is a 3mm thick 6063-T5 aluminum plate with a surface laser roughening treatment (Ra=12.5um). In the present invention, the commonly used specifications and dimensions of the core monomer are as follows: the cell (single core monomer) has a wall thickness of 1.5mm, a 25mm*25mm variable-section hexagon, the thickness of the panels on both sides of the door leaf core 11 is 3mm, the height of the door leaf core 11 is 114mm, and a sandwich panel is formed by the door leaf core 11 and the panels on both sides thereof, with a total thickness of 120mm. The core layer (door leaf core 11) and the panel materials of the sandwich panel are both 6061 aluminum, with a compressive strength of 7.5MPa, a tensile strength of 185MPa, a yield strength of 140MPa, an elastic modulus of 68.9GPa, and a Poisson's ratio of 0.33.

[0045] The innovative features of the present invention are summarized as follows: 1. The specific strength of the door leaf inner core 11 reaches 356MPa·cm 3 / g, the aluminum door leaf inner core 11 structure achieves a 70% weight reduction while increasing the tensile strength to 185MPa; 2. The special structural design of the door leaf inner core 11, the inclined section structure provided therein can increase the wall thickness of the inner core monomer in the projected direction along its axial direction, and the force will cause deformation in the shear direction, so that a large amount of impact energy is absorbed by the deformation of the door leaf inner core 11, which can ensure that the entire door leaf 4 will not undergo a large deformation (or even no deformation). At the same time, the deformation of the door leaf inner core 11 makes the front panel, rear panel and door edge of the door leaf 4 bear the impact force, and the remaining small part of the impact energy is evenly distributed by various parts of the door leaf 4, thus ensuring the impact resistance of the door leaf 4.

[0046] In the present invention, the core strength of the door body reaches 356MPa·cm 3The door's inner core is constructed of aluminum profiles, reducing weight by 70% while increasing tensile strength to 185 MPa. Furthermore, the door's inner core features a unique structural design. Its inclined sections increase the projected wall thickness of the inner core along its axis. This shear deformation of the inner core absorbs significant impact energy, ensuring minimal (or even no) deformation of the entire door. Furthermore, the deformation of the inner core absorbs the impact force from the front, rear, and door trim, while the remaining impact energy is evenly distributed across the entire door, ensuring the door's impact resistance. This structural design addresses the inherent weight of flood-proof doors in existing technologies. Furthermore, the present invention utilizes a threshold-less design, coupled with a sealing beam 5, on which a first sealing strip 6 and a second sealing strip 7 are installed. This ensures airtightness when the door leaf 4 is closed. This design offers a rational design and excellent airtightness. Importantly, the threshold-less design facilitates the passage of personnel and equipment.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electric threshold-free double-leaf lightweight civil air defense door, characterized in that: include: A door frame, comprising a top beam, side beams, and a bottom plate, wherein the top beam and the side beams form an inverted U-shaped structure, and the bottom plate is disposed on the ground and remains flush with the ground; The door leaf is provided with two, and the two door leaves are of a split-type structure. The door leaf is hinged to the door frame, and when the door leaf is closed, it can abut against the top beam and the side beam to form an airtight matching structure; A door lock system, comprising a door lock drive assembly and a sealing beam dynamically connected to the door lock drive assembly, wherein a first sealing strip is provided on one side of the sealing beam to form a sliding airtight fit with the door leaf, and a second sealing strip is provided on the bottom surface of the sealing beam to abut against the bottom plate to form an airtight fit structure; The door lock system also includes a door bolt that is dynamically connected to the door lock drive assembly, and a door lock box that cooperates with the door bolt is provided on the door frame.

2. The electric threshold-free double-leaf lightweight civil defense door according to claim 1 is characterized in that: A door leaf driving device for driving the door leaf to close or open is provided on the door leaf, and the door leaf driving device is an electric device.

3. The electric threshold-free double-leaf lightweight civil defense door according to claim 1 is characterized in that: The lengths of the first sealing strip and the second sealing strip are the same as the length of the sealing beam, and the first sealing strip and the second sealing strip are arranged along the length direction of the sealing beam.

4. The electric threshold-free double-leaf lightweight civil defense door according to claim 1 is characterized in that: The door bolt is arranged on the bottom surface of the sealing beam, and the second sealing strip is arranged on the bottom surface of the sealing beam and on the front side and the rear side of the door bolt.

5. The electric threshold-free double-leaf lightweight civil defense door according to claim 1 is characterized in that: A slot structure is provided on the sealing beam, and the first sealing strip and the second sealing strip are both clamped in the slot structure.

6. The electric threshold-free double-leaf lightweight civil defense door according to claim 1 is characterized in that: The door lock drive assembly includes a handwheel for realizing manual control of the door lock system. A drive motor is connected to the handwheel through a transmission system. The drive motor drives the handwheel to move through the transmission system to realize electric control of the door lock system.

7. The electric threshold-free double-leaf lightweight civil defense door according to claim 6 is characterized in that: The door bolt is provided at a position near the top edge of the door leaf, and the door lock drive assembly is connected to all the door bolts through a multi-link system to achieve synchronous linkage of all the door bolts.

8. The electric threshold-free double-leaf lightweight civil defense door according to claim 5 is characterized in that: The first sealing strip includes a clamping body with a rectangular cross-section and a smooth curved surface portion provided on the clamping body; The first sealing strip has the same structure as the second sealing strip.

9. The electric threshold-free double-leaf lightweight civil defense door according to any one of claims 1 to 8, characterized in that: The door leaf includes a door leaf inner core, and the door leaf inner core includes an inner core unit, and the diameter of the two ends of the inner core unit is different from the diameter of the middle section thereof; The inner core unit is a dumbbell-shaped structure or a shuttle-shaped structure, and the cross section of the inner core unit is a regular hexagonal structure.

10. The electric threshold-free double-leaf lightweight civil air defense door according to claim 9, characterized in that: The inner core units are arranged according to a matrix rule and form the inner core of the door leaf.

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