Electric double-leaf light-weight civil air defense door without threshold

Abstract

The utility model provides a kind of electric no-threshold double-leaf lightweight civil air defence door, belongs to the related technical field of civil air defence equipment, including: door frame, door frame includes roof beam, side beam and bottom plate;Door leaf, door leaf is provided with two, door leaf can be after closing with roof beam and side beam and forms airtight cooperation structure;Door lock system, door lock system includes door lock drive assembly and the sealing beam power connection with door lock drive assembly, the side of sealing beam is provided with the first sealing rubber strip of sliding airtight cooperation with door leaf, the bottom surface of sealing beam is provided with the second sealing rubber strip of airtight cooperation structure that can be with bottom plate and forms, the utility model has adopted no-threshold structure design, and cooperates sealing beam structure, sets up first sealing rubber strip and second sealing rubber strip on sealing beam, can realize the airtightness of door leaf closing under no-threshold structure, the utility model structure design is reasonable, and airtightness is excellent, important is that no-threshold structure design is more convenient personnel, equipment pass.

Description

Technical Field

[0001] This invention relates to the technical field of civil defense equipment, and more specifically, to an electric, threshold-free, double-leaf lightweight civil defense door. Background Technology

[0002] Civil defense doors are common civil defense equipment in civil defense projects. In current technology, the size of civil defense doors is generally small, typically consisting of a single-leaf steel door. Generally, the airtightness of a civil defense door is reflected in the sealing performance between the door leaf and the door frame. Specifically, the door frame is fixed to the concrete doorway, and when the door leaf (single leaf) is closed, one side of the door leaf abuts against the top beam, sides, and threshold of the door frame. A sealing strip is installed at the abutment position, thus achieving airtightness when the civil defense door is closed.

[0003] While traditional air-raid shelter doors can achieve a certain degree of impact resistance and maintain a certain level of airtightness, they still have significant technical drawbacks. For example, they require a threshold structure, which can obstruct water flow, pose a tripping hazard to personnel, and complicate vehicle passage. Furthermore, traditional air-raid shelter doors are relatively small in size. Increasing their dimensions while considering structural strength would significantly increase the weight of the door panel, leading to reduced airtightness and increased difficulty in opening and closing. Summary of the Invention

[0004] (a) Technical issues

[0005] In summary, how to solve the problems of heavy door weight and difficulty in ensuring airtightness in existing flood-proof doors has become an urgent problem to be solved by those skilled in the art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides an electric, threshold-free, double-leaf lightweight air-raid shelter door. In this invention, the electric, threshold-free, double-leaf lightweight air-raid shelter door includes:

[0009] 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 placed on the ground and kept flush with the ground;

[0010] The door leaf has two leaves, which are of a double-opening structure. The door leaf is hinged to the door frame. When the door leaf is closed, it can abut against the top beam and the side beam to form an airtight fit structure.

[0011] A door lock system, the door lock system including a door lock drive assembly and a sealing beam that is poweredly connected to the door lock drive assembly, a first sealing strip that forms a sliding airtight fit with the door leaf is provided on one side of the sealing beam, and a second sealing strip that can abut against the base plate and form an airtight fit structure is provided on the bottom surface of the sealing beam;

[0012] The door lock system also includes a bolt that is poweredly connected to the door lock drive assembly, and a door lock box that cooperates with the bolt is provided on the door frame.

[0013] Preferably, in the electric thresholdless 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.

[0014] Preferably, in the electric thresholdless double-leaf lightweight air-raid shelter door provided by the present invention, 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.

[0015] Preferably, in the electric thresholdless double-leaf lightweight air-raid shelter 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 both the front and rear sides of the door bolt.

[0016] Preferably, in the electric thresholdless double-leaf lightweight air-raid shelter 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 fitted into the slot structure.

[0017] Preferably, in the electric thresholdless double-leaf lightweight civil defense door provided by the present invention, the door lock drive assembly includes a handwheel for manual control of the door lock system, and a drive motor is connected to the handwheel via a transmission system. The drive motor drives the handwheel to move through the transmission system to achieve electric control of the door lock system.

[0018] Preferably, in the electric thresholdless 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 realize the synchronous linkage of all the door bolts.

[0019] Preferably, in the electric thresholdless double-leaf lightweight air-raid shelter door provided by the present invention, the first sealing strip includes a snap-fit ​​body with a rectangular cross-section and a smooth curved surface disposed on the snap-fit ​​body; the first sealing strip has the same structure as the second sealing strip.

[0020] Preferably, in the electric thresholdless double-leaf lightweight civil defense door provided by the present invention, the door leaf includes a door leaf core, the door leaf core includes an inner core unit, the diameters of the two ends of the inner core unit are different from the diameter of its middle section; the inner core unit is a dumbbell-shaped structure or a spindle-shaped structure, and the cross-section of the inner core unit is a regular hexagonal structure.

[0021] Preferably, in the electric thresholdless double-leaf lightweight civil defense door provided by the present invention, the inner core units are arranged in a matrix pattern to form the inner core of the door leaf.

[0022] (III) Beneficial Effects

[0023] As described above, the present invention provides an electric, threshold-free, double-leaf lightweight air-raid shelter door, comprising: a door frame, which includes a top beam, side beams, and a bottom plate, the top beam and side beams forming an inverted U-shaped structure, and the bottom plate being placed on the ground and flush with the ground; two door leaves, which are a double-leaf structure, hinged to the door frame, and when closed, they abut against the top beam and side beams to form an airtight fit; a door lock system, which includes a door lock drive assembly and a sealing beam poweredly connected to the door lock drive assembly, a first sealing strip on one side of the sealing beam forming a sliding airtight fit with the door leaf, and a second sealing strip on the bottom surface of the sealing beam abutting against the bottom plate to form an airtight fit; the door lock system also includes a door bolt poweredly connected to the door lock drive assembly, and a door lock box on the door frame that cooperates with the door bolt. Furthermore, the door leaf includes a door leaf core, which includes an inner core unit. The diameters at both ends of the inner core unit differ from the diameter of its middle section. The inner core unit has a dumbbell-shaped structure or a spindle-shaped structure, and the cross-section of the inner core unit is a regular hexagonal structure.

[0024] In this invention, the inner core of the door employs a special structural design. Its inclined section structure increases the wall thickness of the inner core unit projected along its axis. Under stress, the inner core deforms in the shear direction, absorbing a significant amount of impact energy and ensuring that the entire door does not deform considerably (or even at all). Simultaneously, the deformation of the inner core causes the front panel, back panel, and door edging to bear the impact force, while the remaining small portion of the impact energy is evenly distributed across the various parts of the door, thus ensuring the door's impact resistance. Through this structural design, this invention solves the problem of excessively heavy door weight in existing flood-proof doors.

[0025] In this invention, a threshold-free structural design is adopted, and a sealing beam structure is used in conjunction with it. A first sealing strip and a second sealing strip are set on the sealing beam, which can achieve airtightness when the door is closed under the threshold-free structure. The structural design of this invention is reasonable and has excellent airtightness. More importantly, the threshold-free structural design makes it easier for people and equipment to pass through. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

[0027] Figure 1 This is a schematic diagram of the structure of an electric threshold-free double-leaf lightweight civil defense door in an embodiment of the present invention;

[0028] Figure 2 This is a side view of the electric threshold-free double-leaf lightweight civil defense door in an embodiment of the present invention;

[0029] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle circle;

[0030] Figure 4 This is a schematic diagram of the structure of the inner core of the door in an embodiment of the present invention;

[0031] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B in the middle circle;

[0032] Figure 6 This is a schematic diagram of the door drive device in an embodiment of the present invention.

[0033] In this invention, Figures 1 to 6 The correspondence between component names and reference numerals in the attached drawings is as follows:

[0034] 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, handwheel 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 structure 19, middle structure 20, lower structure 21. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limiting the invention.

[0036] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0037] Please refer to Figures 1 to 6 .

[0038] This invention provides an electric, threshold-free, double-leaf lightweight air-raid shelter door. The door features a double-leaf structure with hinged and double-leaf openings, suitable for large-sized openings in air-raid shelter projects. Furthermore, the door leaves 4 are electrically driven, simplifying the door's drive system. Additionally, the door is threshold-free, facilitating the passage of personnel and vehicles.

[0039] The electric thresholdless double-leaf lightweight air-raid shelter 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 install onto the entrance structure, and the door leaf 4 is installed on the door frame through a hinge assembly. Through the structural design of the door frame and the door leaf 4, an airtight fit can be achieved between the door leaf 4 and the door frame when the door leaf 4 is closed. The door lock system is not only used to lock the door leaf 4 after it is closed, but also has the function of achieving an airtight fit between the door leaf 4 and the door frame.

[0040] In a specific embodiment of the present invention, the specific structures of the door frame, door leaf 4, and door lock system are as follows.

[0041] 1. The structural design of the door frame is as follows.

[0042] The door frame includes a top beam 1, side beams 2, and a base plate 3. Both top beams 1 and side beams 2 are designed using square steel tubing or I-beams, while the base plate 3 is assembled from multiple metal profiles. During installation, the top beam 1 and side beams 2 form an inverted U-shape, ensuring that the sides of the top beam 1 and side beams 2 facing the door leaf 4 are in the same vertical plane. This ensures that the pressure exerted on the top beam 1 and side beams 2 is equal after the door leaf 4 is closed. The base plate 3 is placed on the ground and flush with it, achieving a frameless design. Both ends of the base plate 3 are assembled to the bottom ends of the side beams 2 (using L-shaped components or flange structures, secured with bolts). The top beam 1 has lower connecting structures at both ends. The cross-sectional shape of these lower connecting structures is the same as the top cross-sectional shape of the side beam 2. These lower connecting structures are connected to the top of the side beam 2 via flange structures or welding. The top beam 1 and the side beam 2 form an inverted U-shaped structure. After the base plate 3 is installed, the top beam 1, side beam 2, and base plate 3 form a complete "U"-shaped door frame structure. The door frame can be installed on the entrance structure of the civil defense project using conventional techniques found in existing engineering projects, such as using expansion bolts for fixing.

[0043] For the base plate 3, it can be a "T" shaped structure (i.e., a steel section with a T-shaped cross-section), or it can be assembled from two "L" shaped metal components into a "T" shaped structure.

[0044] 2. The structural design of door leaf 4 is as follows.

[0045] First, in this invention, the door leaf 4 is designed as two to accommodate large-sized opening structures. The two door leaves 4 are a double-opening 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 beam 2 to form an airtight fit structure.

[0046] Door leaf 4 is hinged to the door frame via a hinge assembly. The hinge assembly includes a door frame mounting plate, a door leaf mounting plate, and a hinge plate. Both the door frame mounting plate and the door leaf mounting plate have hinge platforms (each hinge platform consists of two parallel and spaced-apart hinge plates). The hinge plate is mounted to the door frame mounting plate and the door leaf mounting plate via a hinge shaft. For a single door leaf 4, this invention uses at least three hinge assemblies to mount it to the door frame. Furthermore, this invention can increase the number of hinge assemblies on the upper and lower sides of the door leaf 4, and by designing the lateral placement of the hinge assemblies (relative to the middle hinge assembly, the upper hinge assembly is laterally further away from the door leaf 4, and the lower hinge assembly is laterally closer to the door leaf 4), it achieves an upward "pull" and downward "push" effect, ensuring the stability of the door leaf 4.

[0047] For door leaf 4, door leaf 4 includes door leaf core 11, and door leaf core 11 includes core unit 12. The diameters of the two ends of the core unit 12 are different from the diameter of its middle section. The core unit 12 has a dumbbell-shaped structure or a spindle-shaped structure, and the cross-section of the core unit 12 is a regular hexagonal structure. Further, the core units 12 are arranged according to a matrix rule to form door leaf core 11.

[0048] This invention reduces the size of a single door leaf 4 by designing it as two leaves, thus achieving the goal of lightweighting the door leaf 4. Furthermore, this invention also optimizes the structure of the door leaf 4 by designing the inner core unit 12 as a honeycomb structure. Specifically, for further lightweight design of the door leaf 4, this 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 and the rear panel are flat panel structures, and the front panel and the door leaf inner core 11 are brazed together. By setting the door leaf inner core 11, the overall weight 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 multiple evenly distributed inner core units 12. The inner core unit 12 includes an upper structure 19, a middle structure 20, and a lower structure 21. The upper structure 19 and the lower structure 21 are hexagonal cylindrical structures with the same diameter and coaxial arrangement. The two ends of the middle structure 20 include at least transition inclined edges that are inclined relative to the axis of the inner core unit 12 and used to bear shear force. The diameter of the middle structure 20 is smaller than the diameter of the upper structure 19 and the lower structure 21. The middle structure 20 is coaxial with the upper structure 19 and the lower structure 21. The middle structure 20 is a hexagonal cylindrical structure. The inner core unit 12 is provided with a transition bevel. The angle of inclination of the transition bevel relative to the axis of the inner core unit 12 is between 45° and 60°. The transition bevel not only enables the entire inner core unit 12 to have frontal impact resistance (when the door leaf 4 is closed, the impact force directly facing the door leaf 4 or in a direction perpendicular to the door leaf 4 is the frontal impact force, and the ability to resist the frontal impact force is the frontal impact resistance), but also has a certain deformation ability in the shear direction (in the direction perpendicular to the frontal impact force). This deformation ability is the shear resistance. Through the above 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 design impact resistance of the door leaf 4), all the middle sections 20 of the inner core 11 of the door leaf will deform in the shear direction under stress. In this way, the deformation of the inner core 11 absorbs a large amount of impact energy, ensuring that the entire door leaf 4 will not undergo large deformation (or even no deformation). At the same time, the deformation of the inner core 11 allows the front panel, back panel, and door edge of the door leaf 4 to bear the impact force, and the remaining small portion of the impact energy is evenly distributed among the various parts of the door leaf 4. The inner core unit 12 provided by this invention has a regular hexagonal cross-section. This variable cross-section honeycomb structure can ensure the impact resistance of the door leaf 4, while also achieving the lightweighting of the door leaf 4.

[0049] 3. The structural design of the door lock system is as follows.

[0050] The door lock system includes a door lock drive assembly and a sealing beam 5, which is poweredly connected to the door lock drive assembly. The sealing beam 5 is preferably a rectangular steel tube. A first sealing strip 6, forming a sliding, airtight fit with the door leaf 4, is provided on one side of the sealing beam 5 (the side of the sealing beam 5 facing the door leaf 4). A second sealing strip 7, which abuts against the base plate 3 and forms an airtight fit, is provided on the bottom surface of the sealing beam 5. When the sealing beam 5 moves up and down, the first sealing strip 6 always 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 is as follows: a smooth concave upper part and a smooth convex lower part, flush with the main surface of the door leaf 4. This reduces the sliding contact distance between the first sealing strip 6 and the surface of the door leaf 4, reducing sliding wear of the first sealing strip 6. The second sealing strip 7, located on the bottom surface of the sealing beam 5, can press tightly against the base plate 3 after the sealing beam 5 slides down, forming an airtight contact structure with the base plate 3. The first and second sealing strips are disposed on the sealing beam 5 and parallel to the axis of the sealing beam 5. The lengths of the first sealing strip 6 and the second sealing strip 7 are the same as the length of the sealing beam 5, and the first sealing strip 6 and the second sealing strip 7 are disposed 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 snap-fit ​​body with a rectangular cross-section and a smooth curved surface disposed on the snap-fit ​​body. The first sealing strip 6 is an integral structure, and its material is rubber.

[0051] For the installation of the sealing strips, the present invention provides a slot structure on the sealing beam 5, and the first sealing strip 6 and the second sealing strip 7 are both installed in the slot structure.

[0052] The sealing beam 5 has two functions: firstly, to achieve a sealed connection with the base plate 3, and secondly, to achieve locking of the bottom of the door leaf 4. For the first function, the invention achieves this by setting a first sealing strip 6 and a second sealing strip 7. For the second function, the invention provides a bottom bolt 8 on the sealing beam 5, with the bolt 8 located on the bottom surface of the sealing beam 5, and the second sealing strip 7 located on both the bottom surface of the sealing beam 5 and on the front and rear sides of the bolt 8.

[0053] The door lock system also includes a bolt 8 that is poweredly connected to the door lock drive assembly, and a lock box that mates with the bolt 8 is provided on the door frame. Specifically, the door lock drive assembly includes a handwheel 9 for manual control of the door lock system. The handwheel 9 has a handwheel shaft that is rotatably mounted on the door leaf 4. The handwheel 9 can drive the handwheel shaft to rotate, thus achieving manual drive. A drive motor 10 is poweredly connected to the handwheel 9 through a transmission system (which can be a gear transmission system, chain transmission system, or belt transmission system). The drive motor 10 drives the handwheel 9 through the transmission system to achieve electric drive of the door lock system.

[0054] Specifically, the door lock system includes a door lock drive, which comprises a handwheel shaft and a linkage plate. The handwheel shaft outputs rotational motion and drives the linkage plate to move linearly through a worm gear structure. The door lock system also includes a top bolt assembly and a middle bolt assembly. The structures of each bolt assembly are similar. Each bolt assembly includes a boomerang-shaped bolt body, which is hinged to the door panel 4. One arm of the bolt body functions as a "bolt," while the other arm serves as a connector. 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 lock box to lock or unlock the door. The lock box is a component of the door lock system, located on the door frame or another door panel 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 linkage system. The present invention also provides a limit structure to limit the up and down movement of the sealing beam 5. The sealing beam 5 can be linked with each door bolt assembly to lock or open the door leaf 4 synchronously, and achieve bottom sealing while the door leaf 4 is locked.

[0055] A door drive device 13 is provided on the door leaf 4 to drive the door leaf 4 to close or open. The door drive 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 thus driving the movement of the linkage plate.

[0056] In a preferred embodiment of the present invention, a bolt assembly is provided only on the door leaf 4 near its top edge (no middle bolt assembly is provided), and the door lock drive assembly is connected to all the bolts 8 through a multi-link system to achieve synchronous linkage of all the bolts 8.

[0057] The door leaf drive device 13 has the following structure: a door leaf mounting base 14, a push rod 15, an opening / closing cylinder 16, a door leaf opening / closing servo motor 17, and a fixed base 18. The door leaf mounting base 14 is fixedly mounted on the door leaf 4, preferably at the middle position in the height direction of the door leaf 4. The fixed base 18 is mounted on the entrance structure of the civil defense project. The opening / closing cylinder 16 is hinged to the door leaf mounting base 14, and the push rod 15 is slidably mounted on the opening / closing cylinder 16. One end of the push rod 15 is located inside the opening / closing cylinder 16, and the other end of the push rod 15 is located outside the opening / closing cylinder 16 and hinged to the fixed base 18. The door opening and closing servo motor 17 is a motor and reducer assembly structure. The door opening and closing servo motor 17 has a power output shaft. The door opening and closing servo motor 17 is mounted on the door mounting base 14. The power output shaft is rotatably set in the opening and closing cylinder 16. A drive gear is keyed to the power output shaft. The drive gear meshes with the rack structure set on the push rod 15. This can drive the push rod 15 to move in the opening and closing cylinder 16. The change in the overall length between the push rod 15 and the opening and closing cylinder 16 can realize the rotation of the door 4 (opening or closing the door 4).

[0058] As described above, the present invention provides an electric, threshold-free, double-leaf lightweight air-raid shelter door. In this invention, the electric, threshold-free, double-leaf lightweight air-raid shelter door includes: a door frame, comprising a top beam 1, side beams 2, and a base plate 3. The top beam 1 and side beams 2 form an inverted U-shaped structure. The base plate 3 is placed on the ground and remains flush with the ground. There are two door leaves 4, which are a double-leaf structure. The door leaves 4 are hinged to the door frame. When closed, the door leaves 4 can abut against the top beam 1 and the side beams 2. The door lock system includes a door lock drive assembly and a sealing beam 5 that is poweredly connected to the door lock drive assembly. A first sealing strip 6, forming a sliding airtight fit with the door leaf 4, is provided on one side of the sealing beam 5. A second sealing strip 7, which abuts against the base plate 3 and forms an airtight fit, is provided on the bottom surface of the sealing beam 5. The door lock system also includes a door bolt 8 that is poweredly connected to the door lock drive assembly, and a door lock box that mates with the door bolt 8 is provided on the door frame. Further, the door leaf 4 includes a door leaf inner core 11, which includes an inner core unit 12. The diameters at both ends of the inner core unit 12 differ from the diameter of its middle section. The inner core unit 12 has a dumbbell-shaped or spindle-shaped structure, and its cross-section is a regular hexagonal structure.

[0059] In this invention, the door leaf 4 employs a composite sandwich structure, including a front panel (outer skin), a rear panel (inner skin), and a door leaf core 11. The outer skin is made of 4mm thick 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. This transition layer serves as impact buffering and is made of 2mm thick aramid fiber / epoxy resin prepreg with an areal density of 480g / m³.2 The door leaf core 11 is made of 5056 aluminum, with individual core unit dimensions of Ф6mm*50mm (diameter 6mm, height 50mm). The inner skin is made of 3mm thick 6063-T5 aluminum plate with laser-etched surface treatment (Ra=12.5um). In this invention, the commonly used specifications of the inner core unit are as follows: cell (single inner core unit) wall thickness 1.5mm, 25mm*25mm variable cross-section hexagon, the panel thickness 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, with a total thickness of 120mm. The core layer of the sandwich panel (door leaf core 11) and the panel material 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.

[0060] The innovative points of this invention are summarized as follows: 1. The specific strength of the inner core 11 of the door leaf reaches 356 MPa·cm. 3 / g, The aluminum door core 11 structure achieves a 70% weight reduction while increasing the tensile strength to 185MPa; 2. The special structural design of the door core 11, with its inclined section structure, can increase the wall thickness of the projection of the core unit along its axis. Under stress, it will deform in the shear direction. In this way, the deformation of the door core 11 absorbs a large amount of impact energy, which can ensure that the entire door 4 will not deform significantly (or even not deform at all). At the same time, the deformation of the door core 11 allows the front panel, back panel and door edge of the door 4 to bear the impact force, and the remaining small part of the impact energy is distributed evenly among the various parts of the door 4, thus ensuring the impact resistance of the door 4.

[0061] In this invention, the core strength of the door reaches 356 MPa·cm. 3The door core is made of aluminum profiles, achieving a 70% weight reduction while increasing tensile strength to 185MPa. Furthermore, the door core employs a special structural design; its inclined section increases the wall thickness of the core unit's projection along its axis. Under stress, the door core deforms in the shear direction, absorbing a significant amount of impact energy and ensuring the entire door does not deform considerably (or even at all). Simultaneously, the deformation of the door core allows the front and back panels and door edging to bear the impact force, with the remaining impact energy evenly distributed across the door, thus ensuring the door's impact resistance. Through this structural design, the present invention solves the problem of excessive weight in existing flood-proof doors. In addition, the present invention adopts a threshold-free design, coupled with a sealing beam 5. A first sealing strip 6 and a second sealing strip 7 are installed on the sealing beam 5, achieving airtightness when the door leaf 4 is closed under the threshold-free structure. The present invention has a reasonable structural design, excellent airtightness, and, importantly, the threshold-free design facilitates the passage of personnel and equipment.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electrically operated, no threshold, double leaf, lightweight, blast door, characterized in that, The utility model relates to a kind of electric no-door sill double-fan light-weight civil air defense doors, including: Door frame, the door frame includes top beam, side beam and bottom plate, the top beam and the side beam form inverted U-shaped structure, the bottom plate is arranged on ground and ground keeps flush; Two door leaves are provided, and the two door leaves are of opposite opening structure, the door leaf is hinged with the door frame, and the door leaf can be abutted with the top beam and the side beam after being closed and form air-tightness cooperation structure; Door lock system includes door lock driving assembly and sealing beam connected with the door lock driving assembly, one side of the sealing beam is provided with the first sealing rubber strip forming sliding air-tightness cooperation with the door leaf, and the bottom surface of the sealing beam is provided with the second sealing rubber strip abutting with the bottom plate and forming air-tightness cooperation structure; The door lock system further includes door bolt connected with the door lock driving assembly, and door lock box cooperating with the door bolt is arranged on the door frame; The door leaf includes door leaf inner core, the door leaf inner core includes inner core unit, the diameter of the two ends of the inner core unit is different from the diameter of the middle section; The inner core unit is dumbbell type structure or shuttle-shaped structure, and the cross section of the inner core unit is regular hexagon structure; The inner core unit is arranged according to matrix rule and forms door leaf inner core.

2. The electric no-door sill double-fan light-weight civil air defense door according to claim 1, wherein a door leaf driving device for driving the door leaf to close or open is arranged on the door leaf, and the door leaf driving device is an electric device.

3. The electric no-door sill double-fan light-weight civil air defense door according to claim 1, wherein the length of the first sealing rubber strip and the second sealing rubber strip is the same as the length of the sealing beam, and the first sealing rubber strip and the second sealing rubber strip are arranged along the length direction of the sealing beam.

4. The electric no-door sill double-fan light-weight civil air defense door according to claim 1, wherein the door bolt is arranged on the bottom surface of the sealing beam, and the second sealing rubber strip is arranged on the bottom surface of the sealing beam and located at the front side and the rear side of the door bolt.

5. The electric no-door sill double-fan light-weight civil air defense door according to claim 1, wherein a clamping groove structure is arranged on the sealing beam, and the first sealing rubber strip and the second sealing rubber strip are clamped in the clamping groove structure.

6. The electric no-door sill double-fan light-weight civil air defense door according to claim 1, wherein the door lock driving assembly includes a hand wheel, a manual control for realizing the door lock system, a driving motor connected with the hand wheel through a transmission system, and the driving motor drives the hand wheel to act through the transmission system for realizing electric control of the door lock system.

7. The electric no-door sill double-fan light-weight civil air defense door according to claim 6, wherein the door bolt is arranged near the top edge of the door leaf, and the door lock driving assembly is connected with all the door bolts through a multi-link system for realizing synchronous linkage of all the door bolts.

8. The electric no-door sill double-fan light-weight civil air defense door according to claim 5, wherein ​ ​ ​ ​ ​ ​ The first sealing rubber strip comprises a clamping body with a rectangular cross section and a smooth curved surface part arranged on the clamping body. The first sealing rubber strip and the second sealing rubber strip have the same structure.

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