A high-strength fire door reinforcement frame

By designing the frame and support structure, combined with the steel plate base, reinforced steel keel and flame-retardant filling layer, the problems of low strength and poor flame-retardant performance of the fire door reinforcement frame in fire are solved, achieving high-strength flame blocking and heat insulation effects, and reducing the damage of fire to buildings.

CN224579277UActive Publication Date: 2026-07-31ZHUHAI KAIGU BUILDING MATERIALS TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHUHAI KAIGU BUILDING MATERIALS TECHNOLOGY CO LTD
Filing Date
2025-06-18
Publication Date
2026-07-31

AI Technical Summary

Technical Problem

Existing fire door reinforcement frames have low strength and poor flame retardant performance, and cannot maintain their integrity in high-temperature fire environments, thus failing to effectively block fire and heat.

Method used

The design incorporates a frame and support plate structure, combined with a steel plate base, reinforced steel keel, flame-retardant filling layer, and outer protective layer. Magnesium oxide board, fireproof rock wool, and perlite fireproof board are used as flame-retardant filling materials. The positioning grooves and positioning blocks facilitate installation and fixation.

Benefits of technology

It improves the strength and flame-retardant performance of the reinforced frame of the fire door, effectively prevents the spread of flames in a fire, extends the fire resistance time, reduces the damage range of the fire to the building, has a significant isolation effect, and extends the service life.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a high-strength fire door reinforcement frame, including two upright frames and two symmetrically arranged upright frames. The two sides of the support plate contact the top and bottom of the inner side of the upright frames. Positioning grooves are provided on both sides of the support plate, and positioning blocks are provided within the cavities of the positioning grooves. This utility model, by setting positioning grooves and positioning blocks, facilitates the assembly of the upright frames and support plates, allowing for quick positioning during installation and increasing the stability of the upright frames and support plates during installation. External expansion screws are used to fix the upright frames and support plates to the wall of the door frame. The steel plate base and reinforcing steel keel provide high strength. In the event of a fire, when used in conjunction with a fire door, it can effectively prevent the spread and diffusion of flames, controlling the fire within a certain range and significantly reducing the scope and duration of fire damage to the building.
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Description

Technical Field

[0001] This utility model relates to the field of fire door reinforcement frames, specifically to a high-strength fire door reinforcement frame. Background Technology

[0002] Fire doors are doors that meet the requirements of fire resistance stability, integrity, and thermal insulation for a certain period of time. They are fire-resistant partitions with a certain degree of fire resistance, installed in fire compartments, evacuation stairwells, vertical shafts, and other similar locations. In building construction, they are specifically used to isolate fire sources and play a vital role in fire prevention, providing people with an escape route in the event of a fire.

[0003] Currently available fire door reinforcement frames have low strength and poor flame retardant properties. They cannot withstand certain impact forces, which can cause the frames to deform. They cannot maintain good integrity in the high-temperature environment of a fire and cannot effectively block fire and heat.

[0004] Therefore, it is necessary to provide a high-strength fire door reinforcement frame to solve the above-mentioned technical problems. The information disclosed in this background section is only intended to enhance the understanding of the overall background of this utility model, and is not necessarily to be regarded as an admission or to imply in any way that the information constitutes prior art that has become known to those skilled in the art. Utility Model Content

[0005] Therefore, this utility model provides a high-strength fire door reinforcement frame, which solves the problems of low strength, poor flame retardant performance, inability to withstand certain impact forces, frame deformation, inability to maintain good integrity in high-temperature fire environments, and inability to effectively block fire and heat.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-strength fire door reinforcement frame, comprising a vertical frame plate and a support plate. The vertical frame plate consists of two plates, arranged symmetrically on the left and right sides. The two sides of the support plate contact the top and bottom of the inner side of the vertical frame plate. Positioning grooves are provided on both sides of the support plate. Positioning blocks are provided within the inner cavities of the positioning grooves. The outer sides of the positioning blocks penetrate the outer sides of the positioning grooves and are fixed to the top and bottom of the inner side of the vertical frame plate. The vertical frame plate includes a steel plate base layer and reinforcement... The system comprises a reinforced steel keel, a flame-retardant filling layer, and an outer protective layer. The outer protective layer is disposed on the outer surface of the steel plate base layer, the reinforced steel keel is disposed on the inner surface of the steel plate base layer, and the flame-retardant filling layer is disposed on the inner surface of the reinforced steel keel. The flame-retardant filling layer includes a magnesium oxide board, fireproof rock wool, and perlite fireproof board. The fireproof rock wool is disposed on the outer surface of the magnesium oxide board, and the perlite fireproof board is disposed on the outer surface of the fireproof rock wool. The outer protective layer includes a flame-retardant primer layer and a fireproof topcoat layer. The fireproof topcoat layer is disposed on the outer surface of the flame-retardant primer layer.

[0007] Preferably, the outer surface of the flame-retardant primer layer is coated and adhered to the inner surface of the fire-retardant topcoat layer.

[0008] Preferably, the outer surface of the magnesium oxide board is bonded to the inner surface of the fireproof rock wool, and the outer surface of the fireproof rock wool is bonded to the inner surface of the perlite fireproof board.

[0009] Preferably, the base material of the steel plate is galvanized steel plate.

[0010] Preferably, the front side of the frame plate has three hinge mounting slots arranged sequentially from top to bottom, and the three hinge mounting slots are evenly distributed on the front side of the frame plate.

[0011] Preferably, the material of the upright frame plate and the material of the support plate are the same.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model, by setting positioning grooves and positioning blocks, facilitates the assembly of the upright frame plate and support plate, allowing for quick positioning during installation and increasing the stability of the upright frame plate and support plate during installation. The upright frame plate and support plate are fixed to the wall of the door frame by external expansion screws. With the setting of steel plate base and reinforced steel keel, the strength is high. In the event of a fire, when used in conjunction with fire doors, it can effectively prevent the spread and diffusion of flames, control the fire within a certain range, and significantly reduce the scope and duration of fire damage to buildings.

[0014] 2. By setting a flame-retardant filling layer, this utility model not only ensures that the door frame and fire door have a long fire resistance time in a fire, effectively delaying the rapid spread of fire, but also absorbs some of the heat generated by combustion and does not release harmful gases at high temperatures. It has a significant fire isolation effect, playing the role of heat insulation and preventing the spread of fire. The outer protective layer can significantly improve the fire resistance time of the upright frame and support plate, prevent high-temperature sintering cracking, and thus extend the service life of the upright frame and support plate. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of this utility model;

[0016] Figure 2 A structural development diagram of the upright frame plate and support plate provided for this utility model;

[0017] Figure 3 A partial sectional view of the vertical frame plate structure provided by this utility model;

[0018] Figure 4This is a partial cross-sectional view of the flame-retardant filler layer structure provided by this utility model;

[0019] Figure 5 A partial cross-sectional view of the outer protective layer structure provided by this utility model.

[0020] In the diagram: 1. Frame plate; 2. Support plate; 3. Positioning groove; 4. Positioning block; 5. Steel plate base layer; 6. Reinforcing steel keel; 7. Flame-retardant filling layer; 71. Magnesium oxide board; 72. Fireproof rock wool; 73. Perlite fireproof board; 8. Outer protective layer; 81. Flame-retardant primer layer; 82. Fireproof topcoat layer. Detailed Implementation

[0021] 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.

[0022] Example 1, refer to Appendix Figure 1-5 This utility model provides a high-strength fire door reinforcement frame, including a vertical frame plate 1 and a support plate 2. There are two vertical frame plates 1, symmetrically arranged. The two sides of the support plate 2 contact the top and bottom of the inner side of the vertical frame plate 1. Positioning grooves 3 are provided on both sides of the support plate 2. Positioning blocks 4 are provided within the inner cavity of the positioning grooves 3. The outer side of the positioning blocks 4 penetrates the outer side of the positioning grooves 3 and is fixed to the top and bottom of the inner side of the vertical frame plate 1. The vertical frame plate 1 includes a steel plate base layer 5, reinforcing steel keel 6, a flame-retardant filling layer 7, and an outer fireproof layer. The outer protective layer 8 is disposed on the outer surface of the steel plate base layer 5, the reinforcing steel keel 6 is disposed on the inner surface of the steel plate base layer 5, and the flame-retardant filling layer 7 is disposed on the inner surface of the reinforcing steel keel 6. The flame-retardant filling layer 7 includes a magnesium oxide board 71, a fireproof rock wool 72, and a perlite fireproof board 73. The fireproof rock wool 72 is disposed on the outer surface of the magnesium oxide board 71, and the perlite fireproof board 73 is disposed on the outer surface of the fireproof rock wool 72. The outer protective layer 8 includes a flame-retardant primer layer 81 and a fireproof topcoat layer 82. The fireproof topcoat layer 82 is disposed on the outer surface of the flame-retardant primer layer 81.

[0023] The usage process of this utility model is as follows: When using this utility model, the steel plate base layer 5 and the reinforcing steel keel 6 provide high strength. In the event of a fire, when used in conjunction with a fire door, it can effectively prevent the spread and diffusion of flames, controlling the fire within a certain range and significantly reducing the scope and duration of fire damage to buildings. The magnesium oxide board 71 not only ensures that the door frame and fire door have a long fire resistance time during a fire, effectively delaying the rapid spread of fire, but also absorbs some of the heat generated by combustion. The fireproof rock wool 72 and perlite fireproof board 73 are heat-insulating, heat-resistant, and fireproof materials processed through special technology. They have Class A fire resistance, meaning they are non-combustible materials, effectively preventing the spread of fire and not releasing harmful gases at high temperatures. They have a significant fire isolation effect, playing a role in heat insulation and preventing the spread of fire.

[0024] Example 2: The high-strength fire door reinforcement frame provided by this utility model differs from Example 1 in that:

[0025] Refer to the instruction manual appendix Figure 1-5 In this embodiment, a high-strength fire door reinforcement frame is provided. The outer surface of the flame-retardant primer layer 81 is coated and bonded to the inner surface of the fire-retardant topcoat layer 82. The outer surface of the magnesium oxide board 71 is bonded to the inner surface of the fireproof rock wool 72. The outer surface of the fireproof rock wool 72 is bonded to the inner surface of the perlite fireproof board 73. The steel plate base layer 5 is made of galvanized steel plate. The front of the frame plate 1 is provided with three hinge mounting slots from top to bottom. The three hinge mounting slots are evenly distributed on the front of the frame plate 1. The material of the frame plate 1 is the same as that of the support plate 2.

[0026] The specific implementation scenario is as follows: When using this utility model, the steel plate base layer 5 and the reinforcing steel keel 6 provide high strength. In the event of a fire, when used in conjunction with a fire door, they can effectively prevent the spread and diffusion of flames, controlling the fire within a certain range and significantly reducing the scope and duration of damage to the building. The magnesium oxide board 71 not only ensures the door frame and fire door have a long fire resistance time during a fire, effectively delaying the rapid spread of fire, but also absorbs some of the heat generated by combustion. The fireproof rock wool 72 and perlite fireproof board 73, processed through a special process, provide thermal insulation and heat resistance. This fireproof material has Class A fire resistance, meaning it is non-combustible. It effectively prevents the spread of fire and does not release harmful gases at high temperatures. It has a significant fire isolation effect, providing heat insulation and preventing the spread of fire. The flame-retardant primer layer 81 significantly improves the fire resistance time of the frame panel 1 and the support panel 2, preventing high-temperature sintering cracking and thus extending the service life of the frame panel 1 and the support panel 2. The fireproof topcoat layer 82 provides corrosion protection and can form a dense carbonized layer in high-temperature environments, effectively isolating heat transfer, delaying the spread of fire, and buying valuable time for personnel evacuation and fire rescue.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-strength fire door reinforcement frame comprising a vertical frame plate (1) and a support plate (2), characterized in that: The number of the upright frame plates (1) is two, and the two are arranged symmetrically on the left and right. The two sides of the support plate (2) are in contact with the top and bottom of the inner side of the upright frame plate (1). The support plate (2) has a positioning groove (3) on both sides. The positioning groove (3) is provided with a positioning block (4) in its inner cavity. The outer side of the positioning block (4) penetrates the outer side of the positioning groove (3). The outer side of the positioning block (4) is fixed to the top and bottom of the inner side of the upright frame plate (1). The upright frame plate (1) includes a steel plate base (5), a reinforcing steel keel (6), a flame-retardant filling layer (7), and an outer protective layer (8). The outer protective layer (8) is set on the steel plate base (5). 5) The outer surface of the steel keel (6) is provided on the inner surface of the steel plate base layer (5), the flame retardant filling layer (7) is provided on the inner surface of the steel keel (6), the flame retardant filling layer (7) includes magnesium oxide board (71), fireproof rock wool (72) and perlite fireproof board (73), the fireproof rock wool (72) is provided on the outer surface of magnesium oxide board (71), the perlite fireproof board (73) is provided on the outer surface of fireproof rock wool (72), the outer protective layer (8) includes flame retardant primer layer (81) and fireproof topcoat layer (82), the fireproof topcoat layer (82) is provided on the outer surface of flame retardant primer layer (81).

2. A high strength fire door reinforcement frame according to claim 1, wherein: The outer surface of the flame-retardant primer layer (81) is coated and adhered to the inner surface of the fire-retardant topcoat layer (82).

3. A high strength fire door reinforcement frame according to claim 1, wherein: The outer surface of the magnesium oxide board (71) is bonded to the inner surface of the fireproof rock wool (72), and the outer surface of the fireproof rock wool (72) is bonded to the inner surface of the perlite fireproof board (73).

4. The reinforced frame for a high strength fire door of claim 1, wherein: The steel plate base layer (5) is made of galvanized steel plate.

5. The reinforced frame for a high security fire door of claim 1, wherein: The front of the frame plate (1) has three hinge mounting slots arranged from top to bottom, and the three slots are evenly distributed on the front of the frame plate (1).

6. The high-strength fire door reinforcement frame according to claim 1, characterized in that: The material of the upright frame plate (1) is the same as that of the support plate (2).