Soundproofing and heat-insulating integrated security door

Abstract

The utility model relates to door and window technical field, concretely is a sound insulation and heat insulation integrated security door, including door leaf, door frame, lock and external hinge, the door leaf adopts five layer composite structure of panel layer, first damping sound insulation layer, resonance sound elimination layer, high -efficient heat insulation layer, second damping sound insulation layer, and the resonance sound elimination layer in it is provided with spherical cavity and micropore neck in the middle part array, and the non -rotating side of door leaf is provided with adaptive sealing assembly, contains sealing pad, guide slide and return spring, and the circumferential edge of door leaf and door frame is surrounded and constitutes full circumferential acoustic labyrinth structure, including double ladder, toothed engagement and three kinds of convex structure of inclined plane sealing, the first two kinds of staggered form acoustic channel, and the bottom surface convexity is attached seal. The utility model is in the sound insulation and heat insulation synergistic effect, improves the sound insulation volume of door body, and adaptive sealing assembly can adapt to the clearance fluctuation of installation, makes the stable durable structure, prolongs the service life of product.

Description

Technical Field

[0001] This utility model relates to the field of door and window technology, and in particular to a soundproof and heat-insulating integrated safety door. Background Technology

[0002] As a core component of building envelope, security doors must not only meet basic security requirements such as theft prevention and impact resistance, but also adapt to the upgraded needs of modern buildings for living comfort and energy conservation. Especially in scenarios such as residences, hospitals, office buildings, and precision workshops, sound insulation performance directly affects the quietness of the environment, while heat insulation performance is strongly correlated with building energy consumption. However, the mainstream security doors on the market still generally adopt traditional simple layered structures, and their design logic is mainly based on the stacking of basic functions, without forming a coordinated design of sound insulation, heat insulation, and structure.

[0003] Existing security door designs suffer from several major defects. Firstly, the interlayer structure is fragmented, resulting in disjointed sound and heat insulation functions. The sound and heat insulation layers of existing security doors are often made from independently sourced standardized materials, simply glued or mechanically pressed together. This completely separates the functions of the sound and heat insulation layers. The pores in the sound insulation layer become channels for heat conduction, while the sealed structure of the heat insulation layer fails to absorb sound waves, ultimately creating a contradictory situation where sound insulation fails to prevent heat loss, and vice versa. Secondly, the sealing system has poor adaptability. Existing security doors often use a simple method of attaching a rubber sealing strip to one side of the door frame. However, the assembly gap between the door and the frame is greatly affected by the installation process, resulting in an extremely uneven gap distribution. The compression of the sealing strip cannot be standardized, making it difficult to adapt to slight differences in ground level. Utility Model Content

[0004] To address the issues of poor coordination between sound insulation and heat insulation functions in existing security doors, as well as the poor adaptability of the sealing system and the resulting sound and heat leakage due to gaps, this utility model provides an integrated sound and heat insulation security door. The technical solution adopted by this utility model to solve the above problems is as follows: An integrated sound and heat insulation security door includes a door leaf, a door frame, external hinges, and a door lock. The external hinges connect the door leaf and the door frame respectively. The door leaf includes a panel layer, a first damping sound insulation layer, a resonant sound absorbing layer, a high-efficiency heat insulation layer, and a second damping sound insulation layer, which are stacked sequentially from the outside to the inside. The resonant sound absorbing layer has multiple spherical cavities arrayed in the middle, and each spherical cavity is provided with a microporous neck. An adaptive sealing assembly is provided on the non-rotating side of the door leaf. The adaptive sealing assembly includes a sealing pad, a guide slide rod, and a return spring. A guide groove is provided between the resonant sound-absorbing layer and the high-efficiency heat insulation layer. The return spring is embedded in the guide groove. One end of the guide slide rod slides through the guide groove and abuts against the return spring. The other end is fixedly connected to the sealing pad. A guide slope is provided on the side of the sealing pad away from the guide slide rod. The circumferential edge of the door leaf and the corresponding edge of the door frame together form a full-circumferential acoustic maze structure. The full-circumferential acoustic maze structure includes a double-step protrusion structure, a toothed meshing protrusion structure, and a sloped sealing protrusion. The double-step protrusion structure is respectively installed on the top surface of the door leaf and the top surface of the door frame. The toothed meshing protrusion structure is respectively installed on the left and right sides of the door leaf and the left and right sides of the door frame. The two types of protrusion structures are staggered to form a continuous acoustic barrier channel. The sloped sealing protrusion is respectively installed on the bottom surface of the door leaf and the bottom surface of the door frame.

[0005] The aforementioned integrated sound and heat insulation security door employs a planar full-coating bonding method between the panel layer, the first damping sound insulation layer, the resonant sound absorbing layer, the high-efficiency heat insulation layer, and the second damping sound insulation layer, fixedly connected with a high-strength sound insulation adhesive. The parallelism tolerance of each layer in the panel is controlled within ±0.1mm. This parallelism tolerance limitation avoids gaps between layers caused by assembly errors, resulting in a five-layer structure that forms a seamless, gap-free integrated composite layer. This ensures the continuous transmission of sound and heat insulation functions between layers. The planar full-coating bonding eliminates the need for additional mechanical interlocking structures; integration is achieved solely through parallelism calibration and full-coating bonding. This reduces the difficulty of mold design, processing, and assembly, while avoiding the problem of gaps caused by the accumulation of errors in mechanical interlocking. It balances production efficiency and assembly accuracy. Sound waves in the door leaf must penetrate the panel layer, the first damping sound insulation layer, the resonant sound absorbing layer, the high-efficiency heat insulation layer, and the second damping sound insulation layer in sequence, and cannot diffract through gaps between layers. The overall sound insulation is improved by 8-12dB compared to traditional structures.

[0006] The aforementioned integrated sound and heat insulation security door has a panel layer thickness of 3-4mm, a first damping sound insulation layer and a second damping sound insulation layer thickness of 8-12mm, a resonant sound-absorbing layer thickness of 8-10mm, and a high-efficiency heat insulation layer thickness of 8-10mm. The sum of the thicknesses of each layer is adapted to the overall thickness of the door leaf. The thickness of each layer is based on a balance between functional requirements and structural space. The thicknesses of the damping sound insulation layer, the resonant sound-absorbing layer, and the high-efficiency heat insulation layer must meet the core physical requirements, and the panel thickness needs to balance protection and lightweighting. The reasonable combination of the thicknesses of each layer makes the door leaf form a composite structure that is hard on the outside and tough on the inside. The panel layer provides surface rigidity support, and the three middle layers are fully coated and bonded to the panel layer to form an integral force-bearing system, avoiding the problem of easy deformation of a single thin layer. This makes the bending stiffness of the door leaf more than 50% higher than that of traditional single-layer panel and filling layer structures, and it is not easy to warp or dent after long-term use.

[0007] The aforementioned integrated sound and heat insulation safety door has a cavity-free edge area with a width of 15-20mm reserved at the edge of the resonant sound-absorbing layer to ensure structural strength. Outside the cavity-free edge area, multiple spherical cavities are distributed in a square array, with the center-to-center distance between adjacent spherical cavities being 20-30mm. The diameter of the spherical cavities is 6-8mm, and the diameter of the micropore neck is 1-1.5mm. The cavity-free edge area is a solid structure, which can withstand the shear force of interlayer bonding, the vibration impact of door opening and closing, and the compressive stress when it is attached to the door frame. This avoids interlayer peeling and edge cracking caused by the sound-absorbing layer being too thin or completely cavity. The spherical cavities are distributed in a square array to ensure uniform cavity density in the main area of ​​the sound-absorbing layer. When noise penetrates the sound-absorbing layer, it can evenly contact each resonant unit, avoiding sound absorption blind spots caused by the absence of cavities in some areas.

[0008] The aforementioned integrated sound and heat insulation safety door features a microporous neck positioned perpendicular to the surface of the resonant anechoic layer. This microporous neck penetrates only one side wall of the resonant anechoic layer facing the high-efficiency heat insulation layer, without penetrating the overall thickness of the resonant anechoic layer. The microporous neck's perpendicular orientation aligns perfectly with the sound wave transmission path, allowing sound waves to directly enter the cavity without refraction, resulting in a lead-in loss of ≤5%. The sealed cavity, combined with the vertical microporous neck, stabilizes the natural frequency of each resonant unit, preventing frequency drift due to air leakage. This ensures the resonant anechoic layer accurately covers target noise frequencies such as 200Hz elevator vibration, 500Hz electric drill noise, and 800Hz footsteps, achieving precise noise reduction. The microporous neck faces the high-efficiency heat insulation layer, whose dense structure acts as a secondary reflector. Sound waves not fully absorbed by the cavity are reflected by the high-efficiency heat insulation layer and re-enter the cavity through the microporous neck to participate in resonance, forming secondary anechoic effects and further improving the overall absorption efficiency of mid-to-low frequency noise.

[0009] In the aforementioned integrated sound and heat insulation safety door, the adaptive sealing assembly has a guide groove depth of 10-12mm, and the natural length of the return spring is 2-3mm greater than the guide groove depth. A stepped limiting part is integrally formed at the end of the guide rod near the return spring. This stepped limiting part fits into the guide groove and abuts against the groove opening. The return spring's natural length is 2-3mm greater than the groove depth, meaning the spring has a pre-compression of 2-3mm after assembly. This ensures the sealing gasket always has stable elastic pressure. This pressure ensures a tight fit between the sealing gasket and the door frame, filling the standard 0.5-2mm assembly gap, without causing difficulty in closing due to excessive pressure. The guide slope of the sealing gasket works in conjunction with the spring's pre-compression; when closing, the door edge presses against the slope, the spring compresses smoothly, and the sealing gasket moves backward synchronously along the guide rod. This ensures continuous sealing contact and avoids uneven force on the slope causing gasket displacement or leaks.

[0010] The aforementioned integrated sound and heat insulation security door features a double-step raised structure comprising a first step and a second step, arranged sequentially. The first step has a height of 3mm and a width of 8mm, while the second step has a height of 5mm and a width of 8mm. A U-shaped sealing groove is formed on the surface of the double-step raised structure, and an EPDM double-cavity sealing strip is embedded within the U-shaped sealing groove. The double-step raised structure of the door leaf adapts to the double-step groove of the door frame, forming a two-stage bent acoustic channel. Sound waves must successively bypass the first and second step walls to penetrate the gap. The first step first absorbs the initial impact when the door closes, while the second step forms a secondary barrier, preventing impact rebound gaps caused by excessive height of a single step, ensuring the continuity of the acoustic channel without any sound leakage breaks. The EPDM double-cavity sealing strip has better elastic compensation capabilities and can adapt to assembly gap fluctuations of 0.3–1.5mm. When the door closes, the cavity is compressed and deformed, filling the tiny gaps between the step surface and the inner wall of the groove, eliminating sealing dead angles caused by hard contact between metal surfaces.

[0011] The aforementioned integrated sound and heat insulation security door features a guide slope angle of 30-45° on the inclined sealing protrusion structure at the bottom of the door leaf. A wear-resistant silicone sealing strip is attached to the surface of this structure. The bottom surface is the part of the door leaf most significantly affected by gravity, making it prone to slight sagging and increased gaps. When closing, the door slides naturally down the inclined surface. The inclined structure adapts to the 0.5-3mm gap fluctuations through the elastic deformation of the silicone strip, ensuring the strip remains tightly fitted to the door frame groove without any leaks or dead corners. The elastic deformation of the silicone strip fills the tiny gaps between the inclined surface and the groove, preventing sound leakage caused by hard contact between metal surfaces. Simultaneously, the low thermal conductivity of silicone (≤0.02W / (m・K)) blocks thermal bridges at the bottom surface, reducing heat transfer between indoors and outdoors through the gaps.

[0012] The aforementioned integrated sound and heat insulation security door features a toothed engagement protrusion structure with a tooth height of 4-5 mm and a tooth spacing of 10-12 mm. Each tooth surface of the toothed engagement protrusion structure has a strip-shaped sealing groove, into which a solid elastic sealing gasket is embedded. The thickness of the solid elastic sealing gasket exceeds the groove depth by 0.5-1 mm to fill the toothed engagement gap when the door leaf and door frame are closed, thereby enhancing the barrier and sealing performance of the acoustic labyrinth. After the door leaf and door frame are closed, the toothed engagement protrusion structure of the door leaf 1 precisely engages with the toothed engagement protrusion structure of the door frame. The sound waves need to pass around the sides and tops of each tooth in sequence, with a total acoustic path length of ≥80mm, which is 4 times that of traditional planar seals. The energy of mid-to-high frequency noise is attenuated by ≥70% during multiple reflections. The sound insulation of the left and right sides is 10-15dB higher than that of a single-tooth structure. After the teeth mesh, there will be a small gap of 0.3-0.8mm between the tooth surface and the inner wall of the groove. The solid elastic sealing gasket extends 0.5-1mm beyond the sealing groove. When closed, it will be compressed to be flush with the groove depth, completely filling the gap between the teeth and avoiding sound wave diffraction. This increases the blocking efficiency of the acoustic labyrinth from 70% to over 95%.

[0013] As described above, the beneficial effects of the integrated sound and heat insulation security door provided by this utility model are: significant integrated sound and heat insulation effect, and synergistic functional enhancement. This utility model adopts an integrated five-layer composite structure door leaf and an externally adapted circumferential acoustic labyrinth and adaptive sealing components to achieve deep synergy between sound insulation and heat insulation functions, blocking the sound and heat transfer channels between layers. Among them, the resonant sound-absorbing layer, through the design of the solid edge area and the central square array spherical cavity, combined with the vertical and non-penetrating microporous neck, accurately absorbs mid-low frequency noise of 200-1000Hz, with a sound absorption efficiency of ≥85%. The circumferential acoustic labyrinth is designed to address the different scene characteristics of the top, left and right sides and bottom. The design extends the sound and heat transfer path to over 32mm, and combined with the pre-compression adaptive function of the adaptive sealing component, the overall sound insulation of the door is ≥40dB. It boasts strong structural stability and outstanding durability. High-strength sound-insulating adhesive is used to fully bond the layers, and precise thickness and parallelism control of each layer prevents loosening and separation. The door's bending stiffness is increased by more than 50% compared to traditional structures. The stepped limiting part of the adaptive sealing component prevents the sliding rod from falling off. The selection of weather-resistant and wear-resistant materials such as EPDM double-cavity sealing strips and wear-resistant silicone sealing strips ensures a sealing lifespan of ≥8 years. The overall product lifespan is extended by 5-8 years compared to traditional security doors, effectively reducing maintenance costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram showing the unfolding of the door leaf of this utility model; Figure 3 This is an exploded view of the present invention; Figure 4 This is a partial sectional view of the present invention; Figure 5 This is another sectional view of the present invention; Figure 6 for Figure 4 Enlarged view of part I in the middle; Figure 7 for Figure 4 Enlarged view of part II; Figure 8 for Figure 5 Enlarged view of part III.

[0016] Summary of figure labels and their descriptions: 1. Door leaf; 11. Panel layer; 12. First damping sound insulation layer; 13. Resonance sound absorption layer; 131. Spherical cavity; 132. Microporous neck; 14. High-efficiency heat insulation layer; 15. Second damping sound insulation layer; 16. Guide groove; 2. Door frame; 3. Door lock; 4. External hinge; 5. Adaptive sealing assembly; 51. Sealing pad; 52. Guide slide rod; 53. Return spring; 6. Full-circumferential acoustic labyrinth structure; 61. Double-step raised structure; 611. First step; 612. Second step; 62. Toothed meshing raised structure; 63. Sloping sealing raised structure. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. When an element is considered to be "disposed on" another element, it can be directly disposed on the other element or there may be an intervening element. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0019] A soundproof and heat-insulating integrated security door includes a door leaf 1, a door frame 2, an external hinge 4, and a door lock 3. The external hinge 4 connects the door leaf 1 and the door frame 2 respectively. The door leaf 1 includes a panel layer 11, a first damping sound insulation layer 12, a resonant sound absorbing layer 13, a high-efficiency heat insulation layer 14, and a second damping sound insulation layer 15, which are stacked sequentially from the outside to the inside. The resonant sound absorbing layer 13 has a plurality of spherical cavities 131 arranged in an array in the middle, and each spherical cavity 131 is provided with a microporous neck 132. An adaptive sealing assembly 5 is provided on the non-rotating side of the door leaf 1. The adaptive sealing assembly 5 includes a sealing pad 51, a guide slide rod 52, and a return spring 53. A guide groove 16 is provided between the resonant sound-absorbing layer 13 and the high-efficiency heat insulation layer 14. The return spring 53 is embedded in the guide groove 16. One end of the guide slide rod 52 slides through the guide groove 16 and abuts against the return spring 53. The other end is fixedly connected to the sealing pad 51. A guide slope is provided on the side of the sealing pad 51 away from the guide slide rod 52. The circumferential edge of door leaf 1 and the corresponding edge of door frame 2 together form a full-circumferential acoustic maze structure 6. The full-circumferential acoustic maze structure 6 includes a double-step protrusion structure 61, a toothed meshing protrusion structure 62, and a sloped sealing protrusion structure 63. The double-step protrusion structure 61 is installed on the top surface of door leaf 1 and the top surface of door frame 2, respectively. The toothed meshing protrusion structure 62 is installed on the left and right sides of door leaf 1 and the left and right sides of door frame 2, respectively. The above two types of protrusion structures form a continuous acoustic barrier channel by staggered arrangement. The sloped sealing protrusion structure 63 is installed on the bottom surface of door leaf 1 and the bottom surface of door frame 2, respectively.

[0020] Please refer to Figure 3 and Figure 5The panel layer 11, the first damping sound insulation layer 12, the resonant sound absorbing layer 13, the high-efficiency heat insulation layer 14, and the second damping sound insulation layer 15 are bonded together using a planar full-coating method and fixed with a high-strength sound insulation adhesive. The parallelism tolerance of each layer in the door leaf 1 is controlled within ±0.1mm. The limitation of the parallelism tolerance can avoid the gaps between layers caused by assembly errors, so that the five-layer structure forms an integrated composite layer without loosening or gaps, ensuring the continuous transmission of sound insulation and heat insulation functions between each layer. The planar full-coating bonding does not require the design of additional mechanical interlocking structures. Integration can be achieved simply by parallelism calibration and full-coating bonding, which reduces the difficulty of mold design, processing and assembly, and avoids the problem of gaps caused by the accumulation of errors that may occur in mechanical interlocking. It takes into account both production efficiency and assembly accuracy. The sound waves in the door leaf 1 must pass through the panel layer 11, the first damping sound insulation layer 12, the resonant sound absorbing layer 13, the high-efficiency heat insulation layer 14 and the second damping sound insulation layer 15 in sequence, and cannot diffract through the gaps between layers. The overall sound insulation is improved by 8 to 12 dB compared with the traditional structure.

[0021] Please refer to Figure 5 The thickness of the panel layer 11 is 3-4mm, the thickness of the first damping sound insulation layer 12 and the second damping sound insulation layer 15 is 8-12mm, the thickness of the resonant sound absorbing layer 13 is 8-10mm, and the thickness of the high-efficiency heat insulation layer 14 is 8-10mm. The sum of the thicknesses of each layer is adapted to the overall thickness of the door leaf 1. The thickness of each layer is based on the balance between functional requirements and structural space. The thicknesses of the damping sound insulation layer, the resonant sound absorbing layer 13, and the high-efficiency heat insulation layer 14 must meet the core physical requirements, and the thickness of the panel layer 11 must take into account both protection and lightweight. The reasonable combination of the thicknesses of each layer makes the door leaf 1 form a composite structure that is hard on the outside and tough on the inside. The panel layer 11 provides surface rigidity support, and the three middle layers are fully coated and bonded to the panel layer 11 to form an overall force-bearing system, avoiding the problem of easy deformation of a single thin layer. This makes the bending stiffness of the door leaf 1 more than 50% higher than that of the traditional single-layer panel and filling layer structure, and it is not easy to warp or dent after long-term use.

[0022] Please refer to Figure 1 and Figure 8The resonant anechoic layer 13 has a cavity-free edge area with a width of 15-20mm reserved at its edge to ensure structural strength. Outside the cavity-free edge area, multiple spherical cavities 131 are arranged in a square array. The center-to-center distance between adjacent spherical cavities 131 is 20-30mm. The diameter of the spherical cavities 131 is 6-8mm. The diameter of the micropore necks 132 is 1-1.5mm. The cavity-free edge area is a solid structure that can withstand the shear force of interlayer bonding, the vibration impact of opening and closing the door leaf 1, and the compressive stress when it is attached to the door frame 2. This avoids interlayer peeling and edge cracking caused by the edge of the anechoic layer being too thin or completely cavity. The spherical cavities 131 are arranged in a square array to ensure that the cavity density of the main area of ​​the anechoic layer is uniform. When noise penetrates the anechoic layer, it can evenly contact each resonant unit and avoid the anechoic blind zone caused by the absence of cavities in some areas.

[0023] Please refer to Figure 6 and Figure 8 The micro-perforated neck 132 is positioned perpendicular to the surface of the resonant anechoic layer 13, and it only penetrates one side wall of the resonant anechoic layer 13 facing the high-efficiency heat insulation layer 14, without penetrating the overall thickness of the resonant anechoic layer 13. The micro-perforated neck 132's orientation perpendicular to the surface of the anechoic layer perfectly aligns with the sound wave transmission path, allowing sound waves to directly enter the cavity without refraction. The ingress loss is ≤5%. The sealed cavity, combined with the vertical micro-perforated neck 132, makes the natural frequency of each resonant unit more stable, preventing sound waves from being refracted due to air leakage in the cavity. The frequency drift is reduced to ensure that the resonant anechoic layer 13 can accurately cover the target noise frequency bands such as 200Hz elevator vibration, 500Hz electric drill, and 800Hz footsteps, achieving precise noise reduction. The microporous neck 132 faces the high-efficiency heat insulation layer 14, and the dense structure of the high-efficiency heat insulation layer 14 can serve as a secondary reflection surface. Sound waves that are not completely absorbed by the cavity will be reflected by the high-efficiency heat insulation layer 14 and will re-enter the cavity through the microporous neck 132 to participate in resonance, forming secondary anechoic, and further improving the overall absorption efficiency of mid- and low-frequency noise.

[0024] Please refer to Figure 2 and Figure 4In the adaptive sealing assembly 5, the guide groove 16 has a groove depth of 10-12 mm, and the natural length of the return spring 53 is 2-3 mm greater than the groove depth of the guide groove 16. A stepped limiting part is integrally formed at one end of the guide rod 52 near the return spring 53. The stepped limiting part fits into the guide groove 16 and abuts against the end face of the groove opening of the guide groove 16. The natural length of the return spring 53 is 2-3 mm greater than the groove depth, meaning that the spring has a pre-compression of 2-3 mm after assembly. The sealing gasket 51 always has a stable elastic pressure. This pressure ensures that the sealing gasket 51 fits tightly with the door frame 2, filling the conventional assembly gap of 0.5 to 2 mm, without causing difficulty in closing the door due to excessive pressure. The guide slope of the sealing gasket 51 works in conjunction with the spring pre-compression. That is, when the door closes, the door edge squeezes the slope, the spring is smoothly compressed, and the sealing gasket 51 moves backward synchronously along the guide slide rod 52. This ensures the continuity of the sealing contact and avoids the sealing gasket 51 shifting or leaking due to uneven force on the slope.

[0025] Please refer to Figure 7 The double-step raised structure 61 includes a first step segment 611 and a second step segment 612 arranged sequentially. The first step segment 611 has a height of 3mm and a width of 8mm, and the second step segment 612 has a height of 5mm and a width of 8mm. The stepped surface of the double-step raised structure 61 is provided with a U-shaped sealing groove, and an EPDM double-cavity sealing strip is embedded in the U-shaped sealing groove. The double-step raised structure 61 of the door leaf 1 is adapted to the double-step raised structure 61 of the door frame 2 to form a two-stage bent acoustic channel, so that the sound waves need to bypass it sequentially. Only the first and second stepped walls can penetrate the gap. The first stepped section 611 first absorbs the initial impact when the door is closed, and the second stepped section 612 forms a secondary barrier to avoid impact rebound gaps caused by excessive height of a single step, ensuring the continuity of the acoustic channel and eliminating sound leakage breaks. The EPDM dual-cavity sealing strip has better elastic compensation capabilities and can adapt to assembly gap fluctuations of 0.3 to 1.5 mm. When the door is closed, the cavity is compressed and deformed, filling the tiny gaps between the stepped surface and the inner wall of the groove, eliminating sealing dead angles caused by hard contact between metal surfaces.

[0026] Please refer to Figure 2 and Figure 8The guide slope angle of the inclined sealing protrusion structure 63 on the bottom surface of the door leaf 1 is 30-45°. The surface of the inclined sealing protrusion structure 63 is covered with a wear-resistant silicone sealing strip. The bottom surface is the part of the door leaf 1 most significantly affected by gravity, and it is prone to slight sinking, which leads to a larger gap on the bottom surface. When the door is closed, the door body slides down the inclined surface naturally. The inclined structure of the inclined surface can adapt to the fluctuation of the bottom surface gap of 0.5-3mm through the elastic deformation of the silicone strip, ensuring that the strip is always tightly fitted with the inclined sealing protrusion structure 63 of the door frame 2, without any dead corners of leakage. The elastic deformation of the silicone strip can fill the tiny gaps between the inclined surface and the groove, avoiding gap leakage caused by hard contact of metal surfaces. At the same time, the low thermal conductivity of silicone (≤0.02W / (m・K)) can block the thermal bridge on the bottom surface and reduce the conduction of indoor and outdoor heat through the gap on the bottom surface.

[0027] Please refer to Figure 7 The toothed engagement protrusion structure 62 has a tooth height of 4-5 mm and a tooth pitch of 10-12 mm. Each tooth surface of the toothed engagement protrusion structure 62 has a strip-shaped sealing groove, and a solid elastic sealing gasket is embedded in the strip-shaped sealing groove. The thickness of the solid elastic sealing gasket exceeds the groove depth of the strip-shaped sealing groove by 0.5-1 mm, so as to fill the toothed engagement gap when the door leaf 1 and the door frame 2 are closed, thereby enhancing the barrier and sealing performance of the acoustic labyrinth. After the door leaf 1 and the door frame 2 are closed, the toothed engagement protrusion structure 62 of the door leaf 1 and the toothed engagement protrusion structure 62 of the door frame are precisely engaged, and the sound waves need to be controlled according to the specified conditions. By bypassing the sides and tops of each tooth, the total acoustic path length is ≥80mm, which is 4 times that of traditional planar seals. Mid-to-high frequency noise energy is attenuated by ≥70% during multiple reflections. The sound insulation on the left and right sides is 10-15dB higher than that of a single-tooth structure. After the teeth mesh, there will be a small gap of 0.3-0.8mm between the tooth surface and the inner wall of the groove. The solid elastic sealing gasket extends 0.5-1mm beyond the sealing groove. When closed, it will be compressed to be flush with the groove depth, completely filling the gap between the teeth and avoiding sound wave diffraction. This increases the blocking efficiency of the acoustic labyrinth from 70% to over 95%.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A soundproof and heat-insulating integrated security door, comprising a door leaf (1), a door frame (2), a door lock (3), and an external hinge (4), characterized in that: External hinges (4) connect the door leaf (1) and the door frame (2) respectively. The door leaf (1) includes a panel layer (11), a first damping sound insulation layer (12), a resonant sound absorbing layer (13), a high-efficiency heat insulation layer (14), and a second damping sound insulation layer (15) stacked sequentially from the outside to the inside. The resonant sound absorbing layer (13) has multiple spherical cavities (131) arranged in an array in the middle. Each spherical cavity (131) is provided with a microporous neck (132). An adaptive sealing assembly (5) is provided on the non-rotating side of the door leaf (1). The adaptive sealing assembly (5) includes a sealing pad (51), a guide slide rod (52), and a return spring (53). A guide groove (16) is provided between the resonant sound-absorbing layer (13) and the high-efficiency heat insulation layer (14). The return spring (53) is embedded in the guide groove (16). One end of the guide slide rod (52) slides through the guide groove (16) and abuts against the return spring (53). The other end is fixedly connected to the sealing pad (51). A guide slope is provided on the side of the sealing pad (51) away from the guide slide rod (52). The circumferential edge of the door leaf (1) and the corresponding edge of the door frame (2) together form a full-circumferential acoustic maze structure (6). The full-circumferential acoustic maze structure (6) includes a double-step protrusion structure (61), a toothed meshing protrusion structure (62), and a sloped sealing protrusion structure (63). The double-step protrusion structure (61) is installed on the top surface of the door leaf (1) and the top surface of the door frame (2), respectively. The toothed meshing protrusion structure (62) is installed on the left and right sides of the door leaf (1) and the left and right sides of the door frame (2), respectively. The two types of protrusion structures are staggered to form a continuous acoustic barrier channel. The sloped sealing protrusion structure (63) is installed on the bottom surface of the door leaf (1) and the bottom surface of the door frame (2), respectively.

2. The integrated sound insulation and heat insulation safety door according to claim 1, characterized in that: The panel layer (11), the first damping sound insulation layer (12), the resonance sound absorption layer (13), the high-efficiency heat insulation layer (14) and the second damping sound insulation layer (15) are bonded together by a planar full coating method and fixedly connected with a high-strength sound insulation adhesive. The parallelism tolerance of each layer in the door leaf (1) is controlled within ±0.1mm.

3. The integrated sound insulation and heat insulation safety door according to claim 2, characterized in that: The thickness of the panel layer (11) is 3-4 mm, the thickness of the first damping sound insulation layer (12) and the second damping sound insulation layer (15) is 8-12 mm, the thickness of the resonance sound absorbing layer (13) is 8-10 mm, the thickness of the high-efficiency heat insulation layer (14) is 8-10 mm, and the sum of the thicknesses of each layer is adapted to the overall thickness of the door leaf (1).

4. The integrated sound insulation and heat insulation security door according to claim 1, characterized in that: The resonant sound-absorbing layer (13) has a cavity-free edge area with a width of 15-20 mm reserved at its edge to ensure structural strength. In the area outside the cavity-free edge area, multiple spherical cavities (131) are arranged in a square array. The center distance between the rows and columns of adjacent spherical cavities (131) is 20-30 mm. The diameter of the spherical cavity (131) is 6-8 mm. The diameter of the microporous neck (132) is 1-1.5 mm.

5. The integrated sound insulation and heat insulation safety door according to claim 4, characterized in that: The microporous neck (132) is arranged in a direction perpendicular to the surface of the resonant sound-absorbing layer (13), and the microporous neck (132) only penetrates the side wall of the resonant sound-absorbing layer (13) facing the high-efficiency heat insulation layer (14), without penetrating the overall thickness of the resonant sound-absorbing layer (13).

6. The integrated sound insulation and heat insulation security door according to claim 1, characterized in that: In the adaptive sealing assembly (5), the groove depth of the guide slide (16) is 10-12 mm, the natural length of the reset spring (53) is 2-3 mm greater than the groove depth of the guide slide (16), and the guide slide rod (52) has a stepped limiting part integrally formed at one end near the reset spring (53). The stepped limiting part is adapted to fit into the guide slide (16) and abuts against the groove end face of the guide slide (16).

7. The integrated sound and heat insulation safety door according to claim 1, characterized in that: The double-step protrusion structure (61) includes a first step segment (611) and a second step segment (612) distributed sequentially. The first step segment (611) has a height of 3 mm and a width of 8 mm, and the second step segment (612) has a height of 5 mm and a width of 8 mm. The step surface of the double-step protrusion structure (61) is provided with a U-shaped sealing groove, and an EPDM double-cavity sealing strip is embedded in the U-shaped sealing groove.

8. The integrated sound insulation and heat insulation security door according to claim 1, characterized in that: The guide slope angle of the inclined sealing protrusion structure (63) on the bottom surface of the door leaf (1) is 30 to 45°, and the surface of the inclined sealing protrusion structure (63) is covered with a wear-resistant silicone sealing strip.

9. The integrated sound insulation and heat insulation security door according to claim 1, characterized in that: The tooth height of the toothed meshing protrusion structure (62) is 4-5 mm and the tooth pitch is 10-12 mm. Each tooth surface of the toothed meshing protrusion structure (62) is provided with a strip-shaped sealing groove. A solid elastic sealing gasket is embedded in the strip-shaped sealing groove. The thickness of the solid elastic sealing gasket exceeds the groove depth of the strip-shaped sealing groove by 0.5-1 mm.

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