Impact resistant fire door

Abstract

The utility model relates to fireproof door technical field especially is publicize a kind of impact-resistant fireproof door, including door leaf framework, the position of corresponding lock head and door closer installation is provided with wooden mounting lug in door leaf framework inside, at least one installation groove is formed on the inner wall of door leaf framework, reinforcing grid, first fireproof layer, second fireproof layer are arranged in the door leaf framework, the reinforcing grid quantity is same with the installation groove, reinforcing grid edge is inserted in the installation groove inside, the door leaf framework outside is wrapped with outer sleeve. Advantageous effect lies in: reinforcing grid is embedded in framework installation groove and penetrates fireproof layer, forms the framework-grid-fireproof layer composite structure of overall enhancement, this structure can effectively disperse and resist the concentrated impact force of water cannon spray, significantly reduce the risk that door leaf breaks, forms gap or overall collapse under water spray impact, to meet the mandatory requirement of new standard to keep integrity and structural stability after water spray impact.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, and in particular to an impact-resistant fire door. Background Technology

[0002] Fire doors are doors that can meet the requirements of fire resistance stability, integrity, and heat insulation for a certain period of time. They are fire-resistant partitions with a certain degree of fire resistance, installed in fire-resistant compartments, evacuation stairwells, vertical shafts, and other similar locations. In addition to the functions of ordinary doors, fire doors also prevent the spread of fire and smoke, ensuring the safe evacuation of personnel for a certain period. There are many types of fire doors, mainly classified by material as wooden fire doors, steel fire doors, steel-wood fire doors, and other types. Wooden fire doors refer to doors with fire-retardant wood or fire-retardant wood products used for the door frame, door leaf skeleton, and door leaf panel.

[0003] For fire doors installed in evacuation routes or important facilities and equipment locations, performance requirements for resistance to water jet impact are specified to prevent damage during fire fighting caused by water jet impact. Fire doors in evacuation routes and facilities and equipment locations with a fire integrity time of not less than 60 minutes should undergo a water jet impact test after the fire resistance performance test, and meet the following requirements: during the water jet impact test, the fire door should not exhibit any door leaf opening or overall collapse; after the water jet impact test, the fire door should not lose its integrity. Traditional wooden fire doors are prone to breakage and enlarged gaps after being subjected to water jet impact, which does not meet the new standard. Utility Model Content

[0004] This utility model is designed to solve the above-mentioned problems by proposing an impact-resistant fire door.

[0005] The technical solution of this utility model is implemented as follows:

[0006] An impact-resistant fire door includes a door frame. Wooden mounting protrusions are provided inside the door frame at positions corresponding to the installation of the lock and door closer. The door frame is a square frame. At least one mounting groove is formed on the inner wall of the door frame. A reinforcing mesh, a first fireproof layer, and a second fireproof layer are provided inside the door frame. The first and second fireproof layers are integrally formed. The reinforcing mesh is fixed between the first and second fireproof layers, inside the first fireproof layer, or inside the second fireproof layer. The number of reinforcing meshes is the same as the number of mounting grooves. The edges of the reinforcing meshes are inserted into the mounting grooves. An outer sleeve covers the outside of the door frame.

[0007] Furthermore, the door frame is composed of two vertical keels and two horizontal keels spliced ​​together.

[0008] Furthermore, the end of the reinforcing mesh is inserted 1-2 cm into the mounting groove.

[0009] Furthermore, the reinforcing mesh can be either wire mesh or fiberglass mesh.

[0010] Furthermore, the outer casing can be either a thin sheet of iron or a decorative panel.

[0011] Furthermore, several fixing holes are formed on the vertical keels on both sides of the door frame, passing through the mounting groove. The reinforcing mesh is formed with fixing rings corresponding to the fixing holes. A limiting body is fixed in the fixing hole, passing through the fixing rings on the door frame and the reinforcing mesh. The limiting body is made of iron nails with a diameter of not less than 2mm. The two ends of the limiting body are bent and hidden in the front and rear end faces of the door frame.

[0012] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0013] 1. The reinforced mesh is embedded in the frame installation groove and penetrates the fireproof layer to form an overall reinforced frame-mesh-fireproof layer composite structure. This structure can effectively disperse and resist the concentrated impact force of water jet, significantly reducing the risk of door leaf breaking, forming gaps or collapsing under water jet impact, thus meeting the mandatory requirements of the new standard for maintaining integrity and structural stability after water jet impact.

[0014] 2. The reinforced mesh is embedded in the installation groove and firmly fixed by the limiting body, which prevents the mesh from shifting or falling off under impact. The mesh itself has high tensile strength and toughness, which can effectively inhibit the generation and expansion of cracks in the fireproof layer under impact or thermal stress.

[0015] 3. The first and second fireproof layers are integrally formed, and the reinforcing mesh is wrapped in or fixed in between, eliminating weak links in the interlayer delamination and making the entire door core panel a shock-resistant whole.

[0016] 4. Using bent and concealed iron nails as limiting elements, the fixing method is simple, reliable, and low-cost, and the concealed design does not affect the appearance or the continuity of the fireproof layer. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a cross-sectional view of the present invention;

[0020] Figure 3 This is a structural diagram of the door frame of Embodiment 1 of this utility model;

[0021] Figure 4 This is a schematic diagram of the reinforcement mesh installation in Embodiment 2 of this utility model.

[0022] The annotations in the attached figures are explained as follows:

[0023] 1. Door frame; 2. Wooden mounting protrusions; 3. Mounting groove; 4. Reinforcing mesh; 5. First fireproof layer; 6. Second fireproof layer; 7. Outer sleeve; 8. Fixing holes; 9. Limiting body. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1:

[0026] like Figures 1-3As shown, an impact-resistant fire door includes a door frame 1. Wooden mounting protrusions 2 are provided inside the door frame 1 at the positions corresponding to the installation of the lock and the door closer. The wooden mounting protrusions 2 facilitate the subsequent drilling and installation of the lock and the door closer directly on the fire door core board, providing a firm and reliable mounting base and avoiding the impact of drilling directly on the fireproof material on the strength and fixing effect. The door frame 1 is a square frame, which enhances the overall rigidity and deformation resistance of the door, serving as the foundation for bearing internal structure and external stress. At least one mounting groove 3 is formed on the inner wall of the door frame 1. This mounting groove 3 is used to precisely fix and position the internal reinforcing mesh 4, preventing it from shifting during subsequent pouring. The door frame 1 contains the reinforcing mesh 4, a first fireproof layer 5, and a second fireproof layer 6. The first fireproof layer 5 and the second fireproof layer 6 are integrally formed. The reinforcing mesh 4 is fixed between the first fireproof layer 5 and the second fireproof layer 6, inside the first fireproof layer 5, or inside the second fireproof layer 6. The reinforcing mesh 4 is embedded in the fireproof layer or located between two layers, primarily enhancing impact resistance and bending resistance. The force can effectively disperse and absorb impact loads, preventing large-area cracking or breakage of the door core panel when it is impacted, and improving the overall mechanical strength and durability of the fire door. When there are multiple reinforcing meshes 4, the multiple reinforcing meshes 4 can be separated and fixed, which can further improve the performance of the fire door. The number of reinforcing meshes 4 is the same as the number of mounting grooves 3. The edges of the reinforcing meshes 4 are inserted into the mounting grooves 3. By inserting them into the mounting grooves 3, the reinforcing meshes 4 can be accurately positioned and stably installed in the frame, ensuring that they effectively play a reinforcing role in the door frame. The door frame 1 is wrapped with an outer sleeve 7. The outer sleeve 7 mainly serves a protective and decorative function, providing a smooth surface, enhancing the weather resistance and aesthetics of the fire door, and serving as a physical protective layer for the fireproof core panel.

[0027] In another preferred embodiment of the present invention, the door frame 1 is composed of two vertical keels and two horizontal keels spliced ​​together. The structure of splicing vertical and horizontal keels facilitates processing and assembly, and can be flexibly adjusted according to the size of the door, ensuring the regularity and strength of the frame.

[0028] As another preferred embodiment of the present invention, the end of the reinforcing mesh 4 is inserted into the mounting groove 3 by 1-2 cm. The insertion depth of 1-2 cm ensures that the reinforcing mesh 4 and the door frame 1 have sufficient connection strength and stability to prevent them from coming out or loosening. It also avoids the possibility of frame deformation or stress concentration that may be caused by excessive insertion, and facilitates installation.

[0029] In another preferred embodiment of the present invention, the reinforcing mesh 4 is either wire mesh or fiberglass mesh. Wire mesh has low cost and high strength; fiberglass mesh has excellent corrosion resistance and insulation, and is lightweight and non-heat-conducting, which can further improve the overall performance and service life of the fire door. It can be flexibly selected according to specific needs.

[0030] As another preferred embodiment of the present invention, the outer casing 7 is either a thin sheet of iron or a decorative panel. The thin sheet of iron provides robust physical protection and a certain fireproof shielding effect; the decorative panel can meet the requirements of different places for the appearance of fire doors and improve aesthetics. Both can effectively wrap and protect the internal core board.

[0031] Example 2:

[0032] like Figure 4 As shown, the content of this embodiment is largely the same as that of Embodiment 1, except that:

[0033] In this embodiment, several fixing holes 8 are formed on the vertical ribs on both sides of the door frame 1, passing through the mounting groove 3. A fixing ring is formed on the reinforcing mesh 4 corresponding to the fixing holes 8. A limiting body 9, passing through the fixing rings on the door frame 1 and the reinforcing mesh 4, is fixed inside the fixing holes 8. The limiting body 9 is made of iron nails with a diameter of not less than 2mm. The two ends of the limiting body 9 are bent and hidden inside the front and rear end faces of the door frame 1. By passing the limiting body 9 (iron nail) through the fixing holes 8 and the fixing rings on the reinforcing mesh 4, the two sides of the reinforcing mesh 4 are firmly locked to the door frame 1. This design effectively prevents the reinforcing mesh 4 from shifting, deforming, or floating due to fluid impact or vibration during grout pouring, ensuring that the reinforcing mesh 4 is always in the designed position and remains flat, thereby ensuring that its reinforcement effect is uniform throughout the entire door core panel. The design of the limiting body 9 with its bent and hidden ends avoids protrusions affecting the flatness of the subsequent fireproof layer pouring and the fit of the outer casing.

[0034] The working principle of this utility model is as follows:

[0035] During the processing of fire doors, after assembling the door frame 1, the reinforcing mesh 4 is placed inside the door frame 1, ensuring that the edges of the reinforcing mesh 4 are inserted into the mounting groove 3 (the limiting body 9 can be used to fix the two sides of the reinforcing mesh 4 to keep it flat). By inserting it into the mounting groove 3 (and fixing it with the limiting body 9 in Example 2), the precise positioning and stability of the reinforcing mesh 4 in the frame are ensured. Then, the door frame 1 is placed into the casting mold, and magnesium sulfate preparation, magnesium oxide, magnesium chloride, and silica gel are mixed evenly. Plant fiber powder mixture is added, and stirring is continued. If necessary, tourmaline and diatomaceous earth can be added. Finally, an appropriate amount of water is added, and the mixture is stirred evenly to form a slurry. The slurry is poured into the mold, compacted, cured, demolded, dried, and cut to form a magnesium sulfate-oxygen foamed door core board (including door frame 1, reinforcing mesh 4, first fireproof layer 5, and second fireproof layer 6). The magnesium sulfate-oxygen-based material (magnesium sulfate, magnesium oxide, and magnesium chloride) serves as the main matrix, providing excellent fireproof, heat insulation, and lightweight properties. Silica gel enhances the material's adhesion and water resistance. Plant fiber powder mixture, as a lightweight filler and reinforcing material, improves toughness, reduces density, and helps foam to form a porous structure, enhancing thermal insulation performance. Tourmaline and diatomaceous earth serve as functional fillers; tourmaline releases negative ions and may improve fire resistance, while diatomaceous earth enhances adsorption properties and provides some moisture regulation and auxiliary fireproofing effects. The thickness of the wooden mounting protrusion 2 is the same as the door frame 1, and it is exposed after pouring, facilitating subsequent processing (such as drilling holes for locks and door closers). This eliminates the need to cut the fireproof layer to find installation points, improving processing efficiency and installation accuracy. The mass percentages of the fireproof mortar components are: plant fiber powder mixture (20-65%), magnesium sulfate preparation (5-15%), magnesium oxide (5-15%), magnesium chloride (5-10%), silica gel (5-10%), tourmaline (10-20%), and diatomaceous earth (5-10%). This formulation range optimizes the balance of fire resistance, heat insulation, lightweight, strength, and processability. The outer casing 7 is then bonded to the outer surface of the door frame (all six sides: front, back, left, right, top, and bottom) to form a fireproof door panel, which is then stored for later use. The outer casing 7 provides the final protective layer and decorative finish.

[0036] The door frame 1 provides rigid support, the internal reinforced mesh 4 significantly improves impact and bending resistance, the one-piece molded double-layer fireproof layer (sulfur-oxygen magnesium foam core board) provides a core fireproof and heat insulation barrier, and the outer casing 7 provides protection and decoration. The synergistic effect of these components achieves the fire door's high strength, high impact resistance, and excellent fire resistance.

[0037] Components not described in detail in this article are existing technologies.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An impact-resistant fire door, characterized in that: The door frame includes a door frame (1). Wooden mounting protrusions (2) are provided inside the door frame (1) at the positions corresponding to the installation of the lock and the door closer. The door frame (1) is a square frame. At least one mounting groove (3) is formed on the inner wall of the door frame (1). The door frame (1) is provided with a reinforcing mesh (4), a first fireproof layer (5), and a second fireproof layer (6). The first fireproof layer (5) and the second fireproof layer (6) are integrally formed. The reinforcing mesh (4) is fixed between the first fireproof layer (5) and the second fireproof layer (6), inside the first fireproof layer (5), or inside the second fireproof layer (6). The number of reinforcing meshes (4) is the same as the number of mounting grooves (3). The edge of the reinforcing mesh (4) is inserted into the mounting groove (3). The door frame (1) is wrapped with an outer sleeve (7).

2. The impact-resistant fire door according to claim 1, characterized in that: The door frame (1) is made up of two vertical keels and two horizontal keels.

3. The impact-resistant fire door according to claim 2, characterized in that: The end of the reinforcing mesh (4) is inserted into the mounting groove (3) by 1-2 cm.

4. The impact-resistant fire door according to claim 2, characterized in that: The reinforcing mesh (4) can be either wire mesh or fiberglass mesh.

5. The impact-resistant fire door according to claim 2, characterized in that: The outer casing (7) can be either sheet metal or decorative panel.

6. The impact-resistant fire door according to claim 2, characterized in that: The door frame (1) has several fixing holes (8) formed on both sides of the vertical keel, which pass through the mounting groove (3). The reinforcing mesh (4) has fixing rings formed at the positions of the fixing holes (8). The fixing holes (8) are fixed with limiting bodies (9) that pass through the fixing rings on the door frame (1) and the reinforcing mesh (4). The limiting bodies (9) are made of iron nails with a diameter of not less than 2mm. The two ends of the limiting bodies (9) are bent and hidden in the front and rear end faces of the door frame (1).

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