Anti-vibration structure for armored door
By installing earthquake-resistant components and other structural parts inside the armored door, the problem of personnel being unable to pass through in time during an earthquake due to the fire door closing or deforming and misaligning is solved, thus improving the earthquake resistance and safety of the armored door.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HUANGDAO IND &TRADE CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-07-14
AI Technical Summary
The problem of people being injured when armored doors are damaged during earthquakes due to the closing or deformation of fire doors, preventing timely passage.
An anti-seismic structure for armored doors was designed, including an anti-seismic component installed inside the door frame. The anti-seismic component consists of a mounting sleeve, a shock-absorbing spring, a moving rod, a shock-absorbing pad, and a limiting plate. It absorbs impact energy through elastic buffering and frictional energy dissipation, and improves the anti-seismic performance by combining components such as locks, hinges, fixing plates, and rubber blocks.
It effectively absorbs the impact energy from earthquakes, ensuring that the armored door does not affect passage safety due to closure or deformation and misalignment during vibrations, thus improving the earthquake resistance and practicality of the armored door.
Smart Images

Figure CN224496262U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of armored door technology, specifically to an anti-seismic structure for armored doors. Background Technology
[0002] Armored doors are a type of door product specifically designed for high-protection needs, combining aesthetics and security. They are assembled from inner and outer decorative panels, a six-sided box-shaped steel core, side edge protectors, and locks. A robust steel structure (referred to domestically as an armor system) is embedded in the center of the door leaf, and the front and rear surfaces are covered with replaceable finishing materials. This composite structure of "steel core + finishing" gives it the warm appearance of a wooden door and the robust nature of a steel door, making it suitable for military applications, bomb disposal sites, bank vaults, and important material warehouses—places requiring extremely high security.
[0003] As indicated by announcement number CN209483115U, this device, named "Armored Door," includes a door frame, a door leaf, and a lock. One side of the door leaf is movably connected to the door frame, and the other side is connected to the door frame via a lock. The door leaf includes a steel core filled with a fireproof, moisture-proof, and heat-insulating board. The door leaf's steel core is filled with the fireproof, moisture-proof, and heat-insulating board and reinforced with a reinforcing plate.
[0004] During the use of the aforementioned devices, when subjected to vibrations caused by an earthquake, the fire doors may close or become deformed and misaligned, preventing timely passage and potentially causing injury to personnel. Therefore, we have proposed an earthquake-resistant structure for armored doors to address the aforementioned problems. Utility Model Content
[0005] The purpose of this utility model is to provide an anti-seismic structure for armored doors, in order to solve the problem mentioned in the background art that when existing devices are subjected to earthquake vibrations, the fire door may close or deform and become misaligned, causing personnel to be unable to pass in time and thus be injured.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-seismic structure for an armored door, a door frame, a door panel installed on the surface of the door frame, the door panel being movably connected to the door frame, and a cavity being provided inside the door frame, and multiple sets of cavities being provided.
[0007] Also includes:
[0008] An anti-seismic component is disposed inside a cavity. The anti-seismic component includes a mounting sleeve, the bottom end of which is fixedly connected to the cavity. A damping spring is installed inside the mounting sleeve, and the bottom end of the damping spring is fixedly connected to the mounting sleeve. A limit plate is connected to the upper end of the damping spring. A moving rod is provided at the upper end of the limit plate and is fixedly connected to the limit plate. A damping pad is provided at the upper end of the moving rod and is fixedly connected to the moving rod.
[0009] Preferably, a lock is installed on the surface of the door panel, and the lock is fixedly connected to the door panel.
[0010] Preferably, a hinge is installed at the connection between the door panel and the door frame.
[0011] Preferably, a fixing plate is provided on both sides of the door frame, and the fixing plate is fixedly connected to the door frame.
[0012] Preferably, a rubber block is installed inside the door frame, and the rubber block is fixedly connected to the door frame; two sets of the rubber block are provided.
[0013] Preferably, the surface of the door frame is provided with a baffle, and the baffle is connected to the door frame by welding.
[0014] Preferably, the door panel includes a panel layer, a wooden frame layer is provided on one side of the panel layer and the wooden frame layer is fixedly connected to the panel layer, a soundproof layer is provided on one side of the wooden frame layer and the soundproof layer is fixedly connected to the wooden frame layer, and a steel core layer is provided on one side of the soundproof layer and the steel core layer is fixedly connected to the soundproof layer.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This invention incorporates a shock-absorbing pad, ensuring that during strong earthquakes, the impact energy first contacts the pad, allowing for initial absorption. A shock-absorbing spring and a moving rod further enhance this effect. The spring absorbs the initial impact kinetic energy through elastic deformation, while the rigid contact between the limiting plate and the moving rod triggers secondary energy conversion, creating a two-stage shock absorption system of "elastic buffering and frictional energy dissipation." This significantly improves the device's shock absorption performance and practicality, achieving earthquake resistance for the armored door. It also addresses the shortcomings of traditional devices that, when subjected to earthquake vibrations, prevent timely passage and potential injury due to the fire door closing or deforming. Attached Figure Description
[0017] Figure 1 This is a perspective view of the overall structure of this utility model;
[0018] Figure 2 This is a front view of the overall structure of this utility model;
[0019] Figure 3 This is an enlarged view of the internal structure of the door panel of this utility model;
[0020] Figure 4 This is a structural diagram of the earthquake-resistant component of this utility model;
[0021] In the diagram: 1. Door frame; 2. Door panel; 3. Hinge; 4. Fixing plate; 5. Lock; 6. Baffle; 7. Panel layer; 8. Timber layer; 9. Soundproof layer; 10. Steel core layer; 11. Rubber block; 12. Cavity; 13. Anti-vibration component; 14. Mounting sleeve; 15. Shock-absorbing spring; 16. Moving rod; 17. Shock-absorbing pad; 18. Limiting plate. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] Please see Figure 1-4 The present invention provides an embodiment of an anti-seismic structure for an armored door, comprising a door frame 1, a door panel 2 mounted on the surface of the door frame 1, the door panel 2 being movably connected to the door frame 1, and a cavity 12 being provided inside the door frame 1, and multiple sets of cavities 12 being provided.
[0024] Also includes:
[0025] The seismic resistant component 13 is disposed inside the cavity 12. The seismic resistant component 13 includes a mounting sleeve 14, which is fixedly connected to the bottom end of the cavity 12. A shock-absorbing spring 15 is installed inside the mounting sleeve 14, and the bottom end of the shock-absorbing spring 15 is fixedly connected to the mounting sleeve 14. A limit plate 18 is connected to the upper end of the shock-absorbing spring 15. A moving rod 16 is provided at the upper end of the limit plate 18, and the moving rod 16 is fixedly connected to the limit plate 18. A shock-absorbing pad 17 is provided at the upper end of the moving rod 16, and the shock-absorbing pad 17 is fixedly connected to the moving rod 16.
[0026] First, the anti-vibration component 13 is installed in the cavity 12. When a strong earthquake occurs, the impact energy first comes into contact with the damping pad 17, which initially absorbs the energy. Then, the impact energy is conducted to the surface of the moving rod 16 and then to the damping spring 15, which absorbs the initial impact kinetic energy through elastic deformation, thereby damping the shock.
[0027] Please see Figure 1The door panel 2 is equipped with a lock 5, and the lock 5 is fixedly connected to the door panel 2. When this product is in use, the lock 5 serves as a mechanical anchoring node between the door body and the door frame 1. Its function is not limited to the anti-theft function of traditional door locks, but also needs to undertake core responsibilities such as structural earthquake resistance, dynamic load transfer and failure redundancy protection under extreme working conditions (such as earthquakes and explosion impacts). The lock 5 converts the lateral impact force on the door body into the internal force of the system through the rigid engagement of the multi-point lock tongue and the lock hole, preventing the door body from detaching from the door frame 1 due to independent deformation.
[0028] Please see Figure 1 Hinges 3 are installed at the connection between door panel 2 and door frame 1. When this product is in use, hinges 3 are not only the basic component connecting the door body and door frame 1, but also one of the core components for achieving the earthquake resistance function.
[0029] Please see Figure 1 Both sides of the door frame 1 are provided with fixing plates 4, and the fixing plates 4 are fixedly connected to the door frame 1. When this product is in use, the fixing plates 4 are embedded in the wall to provide auxiliary shock absorption.
[0030] Please see Figure 2 A rubber block 11 is installed inside the door frame 1 and is fixedly connected to the door frame 1. Two sets of rubber blocks 11 are provided. When this product is in use, the rubber blocks 11 can provide auxiliary shock absorption at both ends of the device.
[0031] Please see Figure 1 The surface of the door frame 1 is provided with a baffle 6, and the baffle 6 is connected to the door frame 1 by welding. When this product is in use, the baffle 6 can limit the door panel 2.
[0032] Please see Figure 3 The door panel 2 includes a panel layer 7, a wooden frame layer 8 on one side of the panel layer 7, and the wooden frame layer 8 is fixedly connected to the panel layer 7. A soundproof layer 9 is on one side of the wooden frame layer 8, and the soundproof layer 9 is fixedly connected to the wooden frame layer 8. A steel core layer 10 is on one side of the soundproof layer 9, and the steel core layer 10 is fixedly connected to the soundproof layer 9. In use, the panel layer 7 can resist minor impacts, scratches and environmental erosion, providing initial protection for the internal structure. The wooden frame layer 8, as a transition structure between the steel core layer 10 and the panel layer 7, provides longitudinal support and lateral buffering, optimizing the overall mechanical performance of the door. The soundproof layer 9 significantly reduces the transmission of door vibration and noise intrusion through damping dissipation and sound wave reflection mechanisms, improving living comfort. The steel core layer 10, as the mechanical core of the armored door, bears the heavy responsibility of impact resistance, shear resistance and structural integrity maintenance, and is the decisive factor in seismic performance.
[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. An anti-seismic structure for an armored door, comprising a door frame (1), a door panel (2) installed on the surface of the door frame (1), and the door panel (2) being movably connected to the door frame (1), and a cavity (12) being provided inside the door frame (1), and the cavity (12) being provided in multiple sets; Its features are: Also includes: An anti-seismic component (13) is disposed inside a cavity (12). The anti-seismic component (13) includes an installation sleeve (14), which is fixedly connected to the bottom end of the cavity (12). A damping spring (15) is installed inside the installation sleeve (14), and the bottom end of the damping spring (15) is fixedly connected to the installation sleeve (14). A limit plate (18) is connected to the upper end of the damping spring (15). A moving rod (16) is provided at the upper end of the limit plate (18), and the moving rod (16) is fixedly connected to the limit plate (18). A damping pad (17) is provided at the upper end of the moving rod (16), and the damping pad (17) is fixedly connected to the moving rod (16).
2. The anti-seismic structure for an armored door according to claim 1, characterized in that: A lock (5) is installed on the surface of the door panel (2), and the lock (5) is fixedly connected to the door panel (2).
3. The anti-seismic structure for an armored door according to claim 1, characterized in that: A hinge (3) is installed at the connection between the door panel (2) and the door frame (1).
4. The anti-seismic structure for an armored door according to claim 1, characterized in that: Both sides of the door frame (1) are provided with fixing plates (4), and the fixing plates (4) are fixedly connected to the door frame (1).
5. The anti-seismic structure for an armored door according to claim 1, characterized in that: A rubber block (11) is installed inside the door frame (1), and the rubber block (11) is fixedly connected to the door frame (1). Two sets of the rubber block (11) are provided.
6. The anti-seismic structure for an armored door according to claim 1, characterized in that: The surface of the door frame (1) is provided with a baffle (6), and the baffle (6) is connected to the door frame (1) by welding.
7. The anti-seismic structure for an armored door according to claim 1, characterized in that: The door panel (2) includes a panel layer (7), a wooden frame layer (8) is provided on one side of the panel layer (7), and the wooden frame layer (8) is fixedly connected to the panel layer (7). A soundproof layer (9) is provided on one side of the wooden frame layer (8), and the soundproof layer (9) is fixedly connected to the wooden frame layer (8). A steel core layer (10) is provided on one side of the soundproof layer (9), and the steel core layer (10) is fixedly connected to the soundproof layer (9).