A reinforced fire rated filled door

Abstract

This utility model relates to the field of fire-resistant infill door technology, specifically: a reinforced fireproof infill door, comprising a door body, the door body being composed of an outer protective layer, a first fireproof and heat-insulating layer, a reinforcing support layer, a second fireproof and heat-insulating layer, a buffer and shock-absorbing layer, and an inner protective layer. The outer protective layer is a steel plate with a fireproof coating; the first fireproof and heat-insulating layer is an aerogel composite fireproof felt; the reinforcing support layer is a honeycomb stainless steel skeleton structure; the second fireproof and heat-insulating layer is an expanded perlite fireproof board; the buffer and shock-absorbing layer is melamine foam; and the inner protective layer is a fireproof decorative board. In this utility model, through the synergistic effect of the six layers, the performance of the door body is comprehensively improved from multiple aspects such as fireproofing, heat insulation, structural support, and buffer and shock absorption. It can effectively block the spread of flames and heat for a long time during a fire, ensuring the structural integrity of the door body and buying valuable time for safe evacuation and fire rescue.

Description

Technical Field

[0001] This utility model relates to the field of filling door technology, and in particular to a reinforced fireproof filling door. Background Technology

[0002] In the field of building fire safety, fire-resistant filled doors, as important fire-resistant partition components, play a crucial role in preventing the spread of fire and ensuring the safe evacuation of personnel. Traditional fire-resistant filled doors mostly employ relatively simple structures and materials, commonly using wood or steel for the door frame and leaf, filled with fire-resistant materials such as rock wool and aluminum silicate fiber. However, as modern buildings develop towards higher heights, larger scales, and more complex functions, higher requirements are placed on the fire resistance and structural strength of fire-resistant filled doors.

[0003] In practical applications, traditional fireproof infill doors have revealed many problems, mainly their limited fire resistance. Under the continuous exposure to high-temperature flames, fireproof materials are prone to shrinkage, deformation, or even failure, and cannot effectively block the spread of heat and flames for a long time, making it difficult to meet the time requirements for personnel evacuation and rescue in the event of a fire. Utility Model Content

[0004] To address the technical problem of limited fire resistance of traditional doors, this utility model provides a reinforced fireproof filling door.

[0005] The technical solution adopted by this utility model is: a reinforced fireproof filling door, including a door body, the door body being composed of an outer protective layer, a first fireproof and heat-insulating layer, a reinforcing support layer, a second fireproof and heat-insulating layer, a buffer and shock-absorbing layer, and an inner protective layer, wherein the outer protective layer is a steel plate with a fireproof coating, the first fireproof and heat-insulating layer is an aerogel composite fireproof felt, the reinforcing support layer is a honeycomb stainless steel skeleton structure, the second fireproof and heat-insulating layer is an expanded perlite fireproof board, the buffer and shock-absorbing layer is melamine foam, and the inner protective layer is a fireproof decorative board.

[0006] In one embodiment, the surface of the steel plate is coated with a fire-retardant coating, wherein the fire-retardant coating is an intumescent fire-retardant coating.

[0007] In one embodiment, the total thickness of the outer protective layer is 3 mm, of which the steel plate is 2 mm thick and the fire-retardant coating is 1 mm thick.

[0008] In one embodiment, the thickness of the first fireproof and heat-insulating layer is 10 mm.

[0009] In one embodiment, the thickness of the reinforcing support layer is 8 mm, the wall thickness of the stainless steel skeleton is 0.5 mm, and the height of the honeycomb core is 7 mm.

[0010] In one embodiment, the thickness of the second fireproof and heat-insulating layer is 12 mm.

[0011] In one embodiment, the thickness of the buffer and shock-absorbing layer is 5 mm, and the thickness of the inner protective layer is 3 mm.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model, through the synergistic effect of the six-layer structure, comprehensively improves the performance of the door from multiple aspects such as fireproofing and heat insulation, structural support, and shock absorption. It can effectively block the spread of flames and heat for a long time during a fire, ensure the structural integrity of the door, and buy valuable time for the safe evacuation of personnel and fire rescue. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the layered structure of this utility model;

[0015] Figure 3 yes Figure 2 A magnified structural diagram of region A in the middle.

[0016] The markings in the diagram are: 1. Door body; 11. Outer protective layer; 12. First fireproof and heat-insulating layer; 13. Reinforcing support layer; 14. Second fireproof and heat-insulating layer; 15. Buffer and shock-absorbing layer; 16. Inner protective layer. Detailed Implementation

[0017] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 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 based on the specific circumstances.

[0019] The following is in conjunction with the appendix Figure 1-3 The present invention will be further described below.

[0020] To address the problems existing in the background art, this application proposes the following technical solution: a reinforced fireproof filling door, comprising a door body 1, wherein the door body 1 is composed of an outer protective layer 11, a first fireproof and heat-insulating layer 12, a reinforcing support layer 13, a second fireproof and heat-insulating layer 14, a buffer and shock-absorbing layer 15, and an inner protective layer 16, wherein the outer protective layer 11 is a steel plate with a fireproof coating, the first fireproof and heat-insulating layer 12 is an aerogel composite fireproof felt, the reinforcing support layer 13 is a honeycomb stainless steel skeleton structure, the second fireproof and heat-insulating layer 14 is an expanded perlite fireproof board, the buffer and shock-absorbing layer 15 is melamine foam, and the inner protective layer 16 is a fireproof decorative board.

[0021] The above technical solution is explained as follows:

[0022] The outer protective layer 11 is made of high-performance fire-retardant coated steel plate, with a special fire-retardant coating on its surface. The fire-retardant coating is an intumescent type, whose main components include film-forming agents, flame retardants, foaming agents, and catalysts. The film-forming agent forms a continuous and dense protective film on the steel plate surface; the flame retardant effectively inhibits the spread of flames; the foaming agent decomposes at high temperatures to produce a large amount of non-flammable gas, causing the coating to expand and form a sponge-like heat-insulating layer; and the catalyst promotes the decomposition and carbonization process of the foaming agent. The steel plate substrate is made of high-strength cold-rolled steel plate, possessing good mechanical strength and processing performance. The total thickness of the outer protective layer 11 is designed to be 3mm, with the steel plate thickness at 2mm and the fire-retardant coating thickness at 1mm. This thickness design ensures sufficient mechanical strength to withstand external impacts while fully utilizing the fire-retardant performance of the coating.

[0023] The production method of the outer protective layer 11 is as follows: First, the cold-rolled steel sheet undergoes surface treatment, removing impurities such as oil and rust from the steel sheet surface through processes such as degreasing, pickling, and phosphating, thereby increasing the surface roughness and activity of the steel sheet and enhancing its adhesion to the fire-retardant coating. Then, the fire-retardant coating is evenly applied to the steel sheet surface using a spraying process, controlling the coating thickness and uniformity. After spraying, the steel sheet is sent to a drying chamber and dried and cured at a certain temperature (e.g., 150-180℃) to form a stable fire-retardant coating.

[0024] The outer protective layer 11 is bonded to the first fireproof and heat-insulating layer 12 using high-strength structural adhesive. Before bonding, the surface of the first fireproof and heat-insulating layer 12 is cleaned to ensure that there are no oil stains, dust, or other impurities. Then, structural adhesive is evenly applied to the surface of the first fireproof and heat-insulating layer 12, and the outer protective layer 11 is accurately adhered to it. A certain pressure is applied and maintained for a period of time to allow the structural adhesive to fully cure and form a strong connection.

[0025] The first fireproof and heat-insulating layer 12 is made of aerogel composite fireproof felt. Aerogel is a nanoporous material with ultra-high porosity, extremely low density, and excellent heat insulation performance. Its extremely low thermal conductivity effectively blocks heat transfer. Aerogel is combined with fiberglass felt to form an aerogel composite fireproof felt. The fiberglass felt not only enhances the mechanical strength of the aerogel, making it less prone to damage during processing and use, but also further improves the material's fire resistance. The first fireproof and heat-insulating layer 12 has a thickness of 10mm. This thickness fully utilizes the heat insulation advantages of the aerogel composite fireproof felt, effectively preventing heat transfer to the interior of the door 1 during a fire.

[0026] The production method of the first fireproof and heat-insulating layer 12 is as follows: An impregnation-curing process is used to produce the aerogel composite fireproof felt. First, the glass fiber felt is immersed in an aerogel precursor solution, allowing the aerogel precursor to fully penetrate into the pores of the glass fiber felt. Then, through a drying and curing process, the aerogel precursor forms an aerogel network structure inside the glass fiber felt. The drying process typically employs supercritical drying technology to avoid structural collapse of the aerogel due to surface tension during drying, thus ensuring the porous structure and excellent performance of the aerogel.

[0027] The outer side of the first fireproof and heat-insulating layer 12 is bonded to the outer protective layer 11 with structural adhesive, while the inner side is connected to the reinforcing support layer 13 via a high-temperature resistant fiber mesh. Specifically, a layer of high-temperature resistant adhesive is applied to the inner surface of the first fireproof and heat-insulating layer 12, the fiber mesh is laid on top, and compacted with a tool to ensure the adhesive fully impregnates the fiber mesh. Then, another layer of adhesive is applied to the surface of the fiber mesh, and the reinforcing support layer 13 is attached to it. After the adhesive cures, a strong connection between the three layers is achieved.

[0028] The reinforcing support layer 13 is made of a honeycomb stainless steel frame structure. The honeycomb structure possesses excellent mechanical properties, providing higher strength and rigidity than traditional solid structures at the same weight. Stainless steel exhibits good corrosion resistance and high-temperature resistance, maintaining stable structural strength even in fire conditions. The honeycomb core of the stainless steel frame uses a regular hexagonal structure, which offers optimal stability and mechanical properties. The reinforcing support layer 13 is 8mm thick, with the stainless steel frame wall thickness at 0.5mm and the honeycomb core height at 7mm. This design ensures structural strength while minimizing the weight of the door 1.

[0029] The production method of the reinforcing support layer 13 is as follows: First, stainless steel sheets are processed into honeycomb-shaped core materials through a stamping process. Then, the core materials are welded and assembled with stainless steel panels to form a complete honeycomb-shaped stainless steel skeleton structure. During the welding process, high-precision welding processes such as argon arc welding are used to ensure welding quality and guarantee the integrity and strength of the skeleton structure.

[0030] The outer side of the reinforcing support layer 13 is connected to the first fireproof and heat-insulating layer 12 via fiber mesh and adhesive, while the inner side is fixed to the second fireproof and heat-insulating layer 14 via high-strength bolts. Mounting holes matching the bolts are pre-drilled in the second fireproof and heat-insulating layer 14. After aligning the reinforcing support layer 13 and the second fireproof and heat-insulating layer 14, the high-strength bolts are screwed in and tightened, forming a strong mechanical connection between the two layers. Sealant is applied to the bolt joints to prevent heat transfer through the bolts.

[0031] The second fireproof and heat-insulating layer 14 is made of expanded perlite fireproof board. Expanded perlite is a porous heat-insulating material made from perlite through high-temperature calcination and expansion. It features light weight, low thermal conductivity, and good fire resistance. The expanded perlite fireproof board is formed by mixing and pressing expanded perlite particles with an inorganic binder. The inorganic binder is made of high-temperature resistant materials with good bonding properties, such as sodium silicate, to ensure that the fireproof board has good strength and stability. The second fireproof and heat-insulating layer 14 is 12mm thick, and this thicker design further enhances the fireproof and heat-insulating performance of the door 1.

[0032] The production method of the second fireproof and heat-insulating layer 14 is as follows: Expanded perlite particles and inorganic binder are mixed evenly in a certain proportion, and then an appropriate amount of water is added and stirred to make a mixture with good plasticity. The mixture is placed in a mold and pressed under a certain pressure (such as 1-2 MPa). After molding, it is sent to a drying kiln for drying treatment. The drying temperature is controlled at 120-150℃, and the drying time is determined according to the thickness of the board, generally 8-12 hours, so that the fireproof board reaches the specified strength and moisture content requirements.

[0033] The outer side of the second fireproof and heat-insulating layer 14 is fixed to the reinforcing support layer 13 with high-strength bolts, while the inner side is bonded to the buffer and shock-absorbing layer 15 with flexible fireproof sealant. Flexible fireproof sealant is evenly applied to the surface of the buffer and shock-absorbing layer 15, and the second fireproof and heat-insulating layer 14 is then adhered to it. A certain pressure is applied to ensure the sealant fully fills the gap between the two layers, forming a good sealing and connection effect. Simultaneously, the flexible fireproof sealant also provides some shock absorption and cushioning.

[0034] The material of the cushioning and shock-absorbing layer 15 is melamine foam. Melamine foam is an open-cell foam plastic with characteristics such as light weight, softness, good elasticity, and flame retardancy. Its unique porous structure allows it to effectively absorb energy when subjected to external impact, playing a role in cushioning and shock absorption. At the same time, the flame retardant properties of melamine foam can also meet the requirements of fire doors. The thickness of the cushioning and shock-absorbing layer 15 is 5mm. This thickness ensures a good cushioning and shock absorption effect without excessively increasing the thickness and weight of the door body 1.

[0035] The production method of the buffer and shock-absorbing layer 15 is as follows: Melamine foam plastic is produced using a chemical foaming method. Melamine, formaldehyde, urea, and other raw materials are mixed in a certain proportion, and an appropriate amount of catalyst and foaming agent are added. The mixture is reacted at a certain temperature (e.g., 60-80℃). During the reaction, the foaming agent decomposes to produce gas, causing the mixture to expand and form foam plastic. After the reaction is completed, the foam plastic is cured to improve its performance stability.

[0036] The outer side of the shock-absorbing layer 15 is bonded to the second fireproof and heat-insulating layer 14 with flexible fireproof sealant, while the inner side is bonded to the inner protective layer 16 with double-sided adhesive. Before bonding, the surfaces of the shock-absorbing layer 15 and the inner protective layer 16 are cleaned to ensure they are flat and clean. Then, the double-sided adhesive is evenly applied to the inner surface of the shock-absorbing layer 15, the protective film of the double-sided adhesive is peeled off, and the inner protective layer 16 is accurately attached to it and pressed firmly to ensure a secure connection.

[0037] The inner protective layer 16 is made of fire-resistant decorative board, which has an aesthetically pleasing decorative effect while also possessing good fire resistance. The fire-resistant decorative board uses fiber cement board as the base material, and a layer of fire-resistant decorative film is laminated to the surface through a hot-pressing process. The fire-resistant decorative film is made of melamine resin impregnated paper, which has characteristics such as wear resistance, scratch resistance, and fire resistance. The inner protective layer 16 is 3mm thick, of which the fiber cement board is 2mm thick and the fire-resistant decorative film is 1mm thick. This design ensures both the fire resistance performance of the door 1 and meets the aesthetic requirements of architectural decoration.

[0038] The production method of the inner protective layer 16 is as follows: First, the fiber cement board is surface-treated to make its surface smooth and flat. Then, melamine resin impregnated paper is placed on the surface of the fiber cement board and placed in a hot press. It is then subjected to hot pressing treatment at a certain temperature (e.g., 150-180℃) and pressure (e.g., 3-5MPa) to firmly bond the impregnated paper to the fiber cement board, forming a fireproof decorative board.

[0039] The inner protective layer 16 is bonded to the buffer and shock-absorbing layer 15 with double-sided adhesive. To further enhance the connection strength, fireproof sealant is used around the perimeter to prevent air and heat penetration, while also improving the overall aesthetics of the door 1.

[0040] The principle of this invention is as follows: When a fire occurs, the fire-retardant coated steel plate and intumescent fire-retardant coating of the outer protective layer 11 come into play first. Under the influence of flames and high temperatures, the fire-retardant coating rapidly expands, forming a thick, sponge-like heat insulation layer. This heat insulation layer effectively blocks direct contact between the flames and the steel plate, slows down the heating rate of the steel plate, and prevents heat from being transferred to the interior of the door 1. The outer protective layer 11 provides the first fire barrier for the door 1, extending the fire resistance time of the door 1 in a fire.

[0041] The aerogel composite fireproof felt of the first fireproof and heat-insulating layer 12, with its extremely low thermal conductivity, further prevents heat conduction. The nanoporous structure of the aerogel can greatly hinder the heat flow path, making it difficult for heat to penetrate the layer, effectively reducing the temperature rise rate inside the door 1. At the same time, the glass fiber felt enhances the strength of the material, ensuring the structural integrity of the first fireproof and heat-insulating layer 12 in high-temperature environments, and continuously playing a fireproof and heat-insulating role.

[0042] The honeycomb stainless steel skeleton of the reinforced support layer 13 plays a key structural support role in a fire. Its unique honeycomb structure has excellent mechanical properties and can withstand external impact and expansion stress of the internal material of the door 1 under high temperature. This ensures that the door 1 will not deform or be damaged due to structural instability during a fire, maintains the integrity of the door 1, and ensures the normal functioning of the fire-resistant partition.

[0043] The expanded perlite fireproof board of the second fireproof and heat-insulating layer 14 can further absorb and block heat at high temperatures. The porous structure of expanded perlite gives it good heat insulation performance. At the same time, the inorganic binder will not decompose and fail at high temperatures, ensuring the strength and stability of the fireproof board. The second fireproof and heat-insulating layer 14 and the first fireproof and heat-insulating layer 12 work together to form a double fireproof and heat-insulating system, which greatly improves the fire resistance of the door 1.

[0044] When a fire occurs, the melamine foam of the buffer and shock-absorbing layer 15 can absorb the impact of external forces caused by the collapse of building components and the collision of people escaping, protecting the internal structure of the door 1 from damage. On the other hand, its flame-retardant properties can also prevent the spread of flames inside the door 1, further enhancing the fire safety of the door 1.

[0045] The fireproof decorative panel of the inner protective layer 16 not only serves an aesthetic purpose, but also prevents flames and heat from spreading outward from the inside of the door 1 in the event of a fire. At the same time, its tight connection with other layers also helps to maintain the overall structural stability of the door 1.

[0046] In summary, this utility model, through the synergistic effect of its six-layer structure, comprehensively improves the performance of the door 1 from multiple aspects such as fireproofing, heat insulation, structural support, and shock absorption. It can effectively block the spread of flames and heat for a long time during a fire, ensuring the structural integrity of the door 1 and buying valuable time for the safe evacuation of personnel and fire rescue.

[0047] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0048] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A reinforced fire rated filled door, characterized by, The door includes a door body (1), which is composed of an outer protective layer (11), a first fireproof and heat-insulating layer (12), a reinforcing support layer (13), a second fireproof and heat-insulating layer (14), a buffer and shock-absorbing layer (15), and an inner protective layer (16). The outer protective layer (11) is a steel plate with a fireproof coating, the first fireproof and heat-insulating layer (12) is an aerogel composite fireproof felt, the reinforcing support layer (13) is a honeycomb stainless steel skeleton structure, the second fireproof and heat-insulating layer (14) is an expanded perlite fireproof board, the buffer and shock-absorbing layer (15) is melamine foam, and the inner protective layer (16) is a fireproof decorative board.

2. A reinforced fire rated filled door according to claim 1, wherein, The surface of the steel plate is coated with a fire-retardant coating, which is an intumescent fire-retardant coating.

3. A reinforced fire rated filled door according to claim 2, wherein, The total thickness of the outer protective layer (11) is 3mm, of which the steel plate is 2mm thick and the fireproof coating is 1mm thick.

4. A reinforced fire rated filled door according to claim 3, wherein, The thickness of the first fireproof and heat-insulating layer (12) is 10mm.

5. A reinforced fire rated filled door according to claim 4, wherein, The thickness of the reinforcing support layer (13) is 8 mm, wherein the wall thickness of the stainless steel skeleton is 0.5 mm and the height of the honeycomb core is 7 mm.

6. A reinforced fire rated filled door according to claim 5, wherein, The thickness of the second fireproof and heat-insulating layer (14) is 12mm.

7. A reinforced fire door according to claim 6, wherein, The thickness of the buffer and shock-absorbing layer (15) is 5 mm, and the thickness of the inner protective layer (16) is 3 mm.

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