Armored door with built-in noise reduction structure

Abstract

The utility model discloses an armored door with built-in noise reduction structure, including door frame, door leaf and hinge, the door leaf comprises outer layer steel sheet, the noise reduction composite layer that is tightly attached to the inner surface of outer layer steel sheet, and the inner layer steel sheet that is fixed with noise reduction composite layer through hot pressing composite from outside to inside in proper order, the door leaf edge is equipped with the sealing groove, and the double magnetic sealing strip is inlayed in the sealing groove, the door frame inboard corresponding position is equipped with the sealing flange, and the sealing flange forms the airtight occlusion with the double magnetic sealing strip when closing the door, the utility model discloses through the noise reduction composite layer, effectively blocks the noise conduction path, and the hexagonal honeycomb hole of honeycomb sound absorption substrate layer enhances sound absorption effect, and the noise reduction performance is improved significantly, the sealing groove of door leaf edge cooperates with the double magnetic sealing strip and the door frame sealing flange and forms the airtight occlusion, and the special structure of double magnetic sealing strip enhances the sealing effect, effectively insulates the high frequency noise, solves the door gap leak sound problem.

Description

Technical Field

[0001] This utility model relates to the technical field of armored door devices, specifically to an armored door with a built-in noise reduction structure. Background Technology

[0002] Armored doors, as a high-end door product that integrates functions such as anti-theft, fire prevention, and protection, are widely used in residential, commercial, and important security areas. Through high-strength materials and special structural design, they provide users with reliable security.

[0003] However, existing traditional armored doors primarily rely on increasing steel plate thickness and using solid fillers to improve their protective performance. This design has several significant drawbacks: firstly, the single steel plate structure easily becomes a medium for noise transmission during sound propagation, failing to effectively isolate external noise; secondly, the door seam sealing structure is not tight enough, allowing sound to easily leak through the gaps, especially with severely inadequate isolation of high-frequency noise, greatly affecting the overall performance of the armored door and the user experience. Utility Model Content

[0004] (I) Technical Issues

[0005] This invention provides an armored door with a built-in noise reduction structure, which solves the problems of severe noise transmission, low noise reduction efficiency and sound leakage through door gaps in traditional armored doors, thereby improving overall performance and user experience.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an armored door with a built-in noise reduction structure, including a door frame, a door leaf, and hinges. The door leaf, from the outside to the inside, includes an outer steel plate, a noise reduction composite layer tightly bonded to the inner surface of the outer steel plate, and an inner steel plate fixed to the noise reduction composite layer by hot pressing. The edge of the door leaf is provided with a sealing groove, and a double magnetic sealing strip is embedded in the sealing groove. A sealing flange is provided at a corresponding position on the inner side of the door frame. When the door is closed, the sealing flange and the double magnetic sealing strip form an airtight engagement. The noise reduction composite layer consists of a three-layer structure.

[0008] The sound-insulating and damping adhesive layer is directly bonded to the inner wall of the outer steel plate;

[0009] The honeycomb sound-absorbing substrate layer is fixed inside the sound-insulating damping adhesive layer;

[0010] A flame-retardant fiber felt layer is applied to the surface of the honeycomb sound-absorbing substrate layer and bonded to the inner steel plate.

[0011] Furthermore, the honeycomb sound-absorbing substrate layer has hexagonal honeycomb holes arranged in a matrix.

[0012] Furthermore, the double magnetic sealing strip is Ω-shaped, with a magnetic strip embedded inside and a rubber layer covering the outside; the sealing flange is a wedge-shaped structure that matches the Ω shape, and a second magnetic strip is provided at its outer end.

[0013] Furthermore, a grid-like reinforcing frame is fixed inside the door leaf, with the noise-reducing composite layer filling the gaps in the grid.

[0014] (III) Technical Effects

[0015] Compared with existing technologies, the advantages of this invention are as follows: the noise reduction composite layer, composed of a sound-insulating damping adhesive layer, a honeycomb sound-absorbing substrate layer, and a flame-retardant fiber felt layer, effectively blocks the noise transmission path; the hexagonal honeycomb holes of the honeycomb sound-absorbing substrate layer enhance the sound absorption effect and significantly improve the noise reduction performance; the flame-retardant fiber felt layer improves the fire safety of the armored door; the sealing groove on the edge of the door leaf, together with the double magnetic sealing strip, forms an airtight engagement with the sealing flange of the door frame; the special structure of the double magnetic sealing strip enhances the sealing effect, effectively isolates high-frequency noise, and solves the problem of sound leakage through door gaps. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an armored door with a built-in noise reduction structure according to this utility model. Figure 1 .

[0017] Figure 2 This is a three-dimensional structural diagram of an armored door with a built-in noise reduction structure according to this utility model. Figure 2 .

[0018] Figure 3 This is a schematic diagram of the main structure of an armored door with a built-in noise reduction structure according to this utility model.

[0019] Figure 4 This is a schematic diagram of the left side of an armored door with a built-in noise reduction structure according to this utility model.

[0020] Figure 5 This is a cross-sectional structural diagram of an armored door with a built-in noise reduction structure according to this utility model.

[0021] Figure 6 This is a schematic diagram of area A of an armored door with a built-in noise reduction structure according to this utility model.

[0022] As shown in the figure: 1. Door frame; 2. Door leaf; 3. Hinge; 21. Outer steel plate; 22. Noise-reducing composite layer; 23. Inner steel plate; 24. Sealing groove; 25. Double magnetic sealing strip; 221. Sound insulation damping adhesive layer; 222. Honeycomb sound-absorbing substrate layer; 223. Flame-retardant fiber felt layer; 224. Hexagonal honeycomb holes; 251. Magnetic strip; 252. Rubber layer; 111. Magnetic strip II. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Combined with appendix Figure 1 To be continued Figure 6 An armored door with a built-in noise reduction structure includes a door frame 1, a door leaf 2, and hinges 3. The door leaf 2, from the outside to the inside, includes an outer steel plate 21, a noise reduction composite layer 22 tightly attached to the inner surface of the outer steel plate 21, and an inner steel plate 23 fixed to the noise reduction composite layer 22 by hot pressing. The edge of the door leaf 2 is provided with a sealing groove 24, and a double magnetic sealing strip 25 is embedded in the sealing groove 24. A sealing flange 11 is provided at a corresponding position on the inner side of the door frame 1. When the door is closed, the sealing flange 11 and the double magnetic sealing strip 25 form an airtight engagement. The noise reduction composite layer 22 consists of a three-layer structure: a sound insulation damping adhesive layer 221, which is directly bonded to the inner wall of the outer steel plate 21; a honeycomb sound-absorbing substrate layer 222, which is fixed to the inner side of the sound insulation damping adhesive layer 221; and a flame-retardant fiber felt layer 223, which covers the surface of the honeycomb sound-absorbing substrate layer 222 and is bonded to the inner steel plate 23. The honeycomb sound-absorbing substrate layer 222 has hexagonal honeycomb holes 224 arranged in a matrix.

[0027] The double magnetic sealing strip 25 is Ω-shaped, with a magnetic strip 251 embedded inside and a rubber layer 252 covering the outside; the sealing flange 11 is a wedge-shaped structure that matches the Ω shape, and a magnetic strip 111 is provided at its outer end.

[0028] The door leaf 2 is also fixedly provided with a grid-shaped reinforcing frame, and the gaps in the grid are filled with the noise reduction composite layer 22.

[0029] The sound-insulating damping adhesive layer 221 is made of butyl rubber and damping filler (such as calcium carbonate or kaolin). The honeycomb sound-absorbing substrate layer 222 is made of aluminum honeycomb. The flame-retardant fiber felt layer 223 is made of glass fiber or basalt fiber.

[0030] The working principle of this utility model is as follows: When external noise enters the armored door with a built-in noise reduction structure, the noise reduction composite layer 22 of the door leaf 2 begins to function. The sound insulation damping adhesive layer 221 is directly bonded to the inner wall of the outer steel plate 21, which can absorb and attenuate some of the noise energy transmitted through the outer steel plate 21; the hexagonal honeycomb holes 224 distributed in a matrix on the honeycomb sound-absorbing substrate layer 222 utilize the multiple reflections and friction of sound waves in the honeycomb holes to convert sound energy into heat energy, further absorbing noise; the flame-retardant fiber felt layer 223 covers the surface of the honeycomb sound-absorbing substrate layer 222 and is bonded to the inner steel plate 23, which filters and absorbs residual noise again, thereby effectively reducing the amount of noise transmitted into the room through the door leaf 2. When the door leaf 2 is closed, the double magnetic sealing strip 25 embedded in the sealing groove 24 on the edge of the door leaf 2 cooperates with the sealing flange 11 on the inner side of the door frame 1. The double magnetic sealing strip 25 is Ω-shaped, with the embedded magnetic strip 251 attracting the magnetic strip 111 at the outer end of the sealing flange 11, causing the double magnetic sealing strip 25 to fit tightly against the sealing flange 11, forming an airtight seal. This sealing structure effectively blocks noise from entering through the door gaps, especially effectively isolating high-frequency noise. Furthermore, the internal mesh-like reinforcing frame of the door leaf 2 provides structural support, ensuring the protective strength of the armored door.

[0031] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An armored door with a built-in noise reduction structure, comprising a door frame (1), a door leaf (2), and hinges (3), characterized in that: The door leaf (2) consists of an outer steel plate (21) from the outside to the inside, a noise reduction composite layer (22) that is tightly attached to the inner surface of the outer steel plate (21), and an inner steel plate (23) that is fixed to the noise reduction composite layer (22) by hot pressing. The door leaf (2) has a sealing groove (24) on its edge, and a double magnetic sealing strip (25) is embedded in the sealing groove (24); the door frame (1) has a sealing flange (11) at the corresponding position on its inner side, and when the door is closed, the sealing flange (11) and the double magnetic sealing strip (25) form an airtight engagement. The noise reduction composite layer (22) consists of a three-layer structure: The sound-insulating damping adhesive layer (221) is directly bonded to the inner wall of the outer steel plate (21); The honeycomb sound-absorbing substrate layer (222) is fixed to the inside of the sound insulation damping adhesive layer (221); A flame-retardant fiber felt layer (223) is applied to the surface of the honeycomb sound-absorbing substrate layer (222) and bonded to the inner steel plate (23).

2. The armored door with a built-in noise reduction structure according to claim 1, characterized in that: The honeycomb sound-absorbing substrate layer (222) has hexagonal honeycomb holes (224) arranged in a matrix.

3. An armored door with a built-in noise reduction structure according to claim 1, characterized in that: The double magnetic sealing strip (25) is Ω-shaped, with a magnetic strip (251) embedded inside and a rubber layer (252) covering the outside; the sealing flange (11) is a wedge-shaped structure that matches the Ω shape, and a second magnetic strip (111) is provided at its outer end.

4. An armored door with a built-in noise reduction structure according to claim 1, characterized in that: The door leaf (2) is also fixedly provided with a grid-shaped reinforcing frame inside, and the gaps in the grid are filled with the noise reduction composite layer (22).

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