First-grade steel heat insulation fireproof door

Abstract

The utility model belongs to the technical field of fireproof doors, and discloses a class-A steel heat insulation fireproof door which comprises a door frame and a door leaf, reinforcing ribs are arranged on the inner side of the door frame, the door frame is of a double-layer steel plate structure, and rock wool is filled in the double-layer steel plate structure. The door leaf is of a double-layer structure, a supporting frame is arranged on the edge of the door leaf, a door core plate is arranged in the supporting frame, reinforcing ribs shaped like a Chinese character'mi 'are arranged on the two sides of the door core plate and connected with the supporting frame, heat insulation materials are filled between the reinforcing ribs shaped like the Chinese character'mi', and an expanded perlite plate is arranged in the middle of the heat insulation materials. And the two sides are compounded by fireproof heat-insulating felts. Through the multi-layer composite heat insulation material and the intumescent fireproof coating, the heat insulation performance of the door leaf is remarkably improved, and the fire-resistant time is prolonged; through the design of the double-layer steel plate structure and the star-shaped reinforcing ribs, the structural strength and the deformation resistance of the door frame and the door leaf are improved, and it is ensured that good sealing performance and integrity can still be kept in the high-temperature environment.

Description

Technical Field

[0001] This utility model belongs to the field of fire door technology, specifically relating to a Class A steel insulated fire door. Background Technology

[0002] In building fire safety, fire doors are crucial components for preventing the spread of fire and smoke. While traditional Class A steel fire doors meet basic fire resistance requirements, they have shortcomings in terms of insulation, sealing, durability, and maintainability. Especially in high-temperature environments, the insulation and sealing performance of the door leaf significantly decreases, affecting its fire resistance. Therefore, a new type of Class A steel insulated fire door is needed to improve its safety and reliability in fire environments. Summary of the Invention

[0003] To address the aforementioned problems, this utility model discloses a Class A steel insulated fire door. By using multi-layer composite insulation materials and intumescent fire-retardant coatings, the heat insulation performance of the door leaf is significantly improved, and the fire resistance time is extended. Through the design of a double-layer steel plate structure and a cross-shaped reinforcing rib, the structural strength and deformation resistance of the door frame and door leaf are improved, ensuring that good sealing and integrity can still be maintained in high-temperature environments.

[0004] To achieve the above objectives, the specific technical solution of this application is as follows:

[0005] A Class A steel insulated fire door includes a door frame and a door leaf. The door frame has reinforcing ribs on its inner side and is made of double-layer steel plate structure, with rock wool filling the double-layer steel plate structure. The door leaf is also a double-layer structure with a support frame at its edge. A door core panel is provided inside the support frame, and a cross-shaped reinforcing rib is provided on both sides of the door core panel. The cross-shaped reinforcing rib is connected to the support frame, and heat insulation material is filled between the cross-shaped reinforcing ribs. The heat insulation material is composed of an expanded perlite board in the middle and fireproof heat insulation felt on both sides.

[0006] Based on the above technical features, furthermore, the door leaf is connected to the door frame on one side by a fireproof hinge and on the other side by a fireproof lock.

[0007] Based on the above technical features, furthermore, an expansion-type sealing strip is installed around the door frame. When the temperature rises, the sealing strip will automatically expand to fill the gap between the door frame and the door leaf, enhance the sealing performance, and prevent the leakage of smoke and heat. The door leaf is provided with a silicone rubber elastic sealing strip around its perimeter, which has good elasticity and sealing performance and can effectively prevent the transmission of smoke and heat.

[0008] Based on the above technical features, preferably, the steel plate thickness of the door frame is not less than 2mm, and the steel plate thickness of the door leaf is not less than 1.2mm.

[0009] Based on the above technical features, preferably, both the inner and outer surfaces of the door leaf are coated with an intumescent fire-retardant coating. The intumescent fire-retardant coating can rapidly expand at high temperatures to form a heat-insulating foam layer, further improving the heat insulation performance and fire resistance time of the door leaf.

[0010] Based on the above technical features, preferably, the door leaf is provided with a fireproof glass observation window. The fireproof glass adopts a multi-layer composite structure, including a fireproof glass layer, a fireproof adhesive layer and a heat insulation film layer, which has good heat insulation performance and fire resistance performance, while ensuring visibility in the event of a fire and facilitating observation of the fire situation.

[0011] Compared with the prior art, the beneficial effects of this application include at least one of the following:

[0012] This application significantly improves the heat insulation performance of the door leaf and extends the fire resistance time by using multi-layer composite heat insulation materials and intumescent fire-retardant coatings;

[0013] The double-layer steel plate structure and the design of the cross-shaped reinforcing ribs improve the structural strength and deformation resistance of the door frame and door leaf, ensuring that they can maintain good sealing and integrity even in high-temperature environments.

[0014] The dual sealing design of the expansion-type sealing strip and the silicone rubber elastic sealing strip effectively prevents the leakage of smoke and heat, improving the sealing performance of the fire door;

[0015] The design of the fire-resistant glass observation window ensures visibility during a fire, facilitates observation of the fire situation, and improves safety. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a Class A steel insulated fire door according to this utility model;

[0017] Figure 2 This is a schematic diagram of the door frame structure in this utility model;

[0018] Figure 3 This is a schematic diagram of the door leaf structure in this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the door leaf in this utility model;

[0020] List of identifiers in attached diagrams:

[0021] 1. Door frame; 2. Reinforcing ribs; 3. Expandable sealing strips; 4. Rock wool; 5. Door leaf; 6. Support frame; 7. Cross-shaped reinforcing ribs; 8. Door core panel; 9. Thermal insulation material; 901. Expanded perlite board; 902. Fireproof and heat-insulating felt; 10. Fireproof hinges; 11. Fireproof locks; 12. Silicone rubber elastic sealing strips; 13. Fireproof glass observation window. Detailed Implementation

[0022] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0023] It should be noted that the terms "upper," "lower," "left," "right," "front," and "rear" used in the following description refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between 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.

[0024] like Figures 1-4 As shown, a Class A steel insulated fire door includes a door frame 1 and a door leaf 5. The door frame 1 has reinforcing ribs 2 on its inner side and adopts a double-layer steel plate structure. Rock wool 4 is filled within the double-layer steel plate structure to ensure the strength and heat insulation performance of the door frame. The door leaf 5 has a double-layer structure, with a support frame 6 at its edge. A door core panel 8 is located within the support frame. Both sides of the door core panel 8 are provided with cross-shaped reinforcing ribs 7, which are connected to the support frame 7. Heat insulation material 9 is filled between the cross-shaped reinforcing ribs 7. The heat insulation material 9 is composed of an expanded perlite board 901 in the middle and fireproof heat insulation felt 902 on both sides.

[0025] Furthermore, the door leaf 5 is connected to the door frame 1 on one side by a fireproof hinge 10 and on the other side by a fireproof lock 11. Both the fireproof hinge 10 and the fireproof lock 11 are made of high-temperature resistant materials to ensure that they can still work normally in a fire environment.

[0026] Furthermore, an expansion-type sealing strip 3 is installed around the door frame. When the temperature rises, the sealing strip will automatically expand to fill the gap between the door frame and the door leaf, enhance the sealing performance, and prevent the leakage of smoke and heat. The door leaf is provided with a silicone rubber elastic sealing strip 12 around its perimeter, which has good elasticity and sealing performance and can effectively prevent the transmission of smoke and heat.

[0027] Preferably, the door frame 1 is made of cold-rolled steel plate with a thickness of not less than 2mm, and the door leaf 5 is made of cold-rolled steel plate with a thickness of not less than 1.2mm.

[0028] Preferably, both the inner and outer surfaces of the door leaf are coated with an intumescent fire-retardant coating. The intumescent fire-retardant coating can rapidly expand at high temperatures to form a heat-insulating foam layer, further improving the heat insulation performance and fire resistance time of the door leaf.

[0029] Preferably, the door leaf is provided with a fireproof glass observation window 13. The fireproof glass adopts a multi-layer composite structure, including a fireproof glass layer, a fireproof adhesive layer and a heat insulation film layer, which has good heat insulation performance and fire resistance performance, while ensuring visibility in the event of a fire and facilitating observation of the fire situation.

[0030] Working principle:

[0031] Under normal operating conditions, the fire door leaf and frame are connected by fire-resistant hinges and fire-resistant locks to ensure the normal opening and closing of the door leaf. The intumescent fire-retardant coating applied to the inner and outer surfaces of the door leaf remains stable at normal temperatures and does not affect the normal use of the door leaf.

[0032] When a fire occurs and the temperature rises, the expansion-type sealing strip around the door frame automatically expands to fill the gap between the door frame and the door leaf, enhancing the seal and preventing the leakage of smoke and heat.

[0033] The intumescent fire-retardant coating on the door leaf expands rapidly at high temperatures to form a heat-insulating foam layer, further improving the heat insulation performance of the door leaf and preventing heat transfer.

[0034] The fire-resistant glass observation window on the door can maintain good heat insulation and fire resistance performance even at high temperatures, ensuring visibility during a fire and facilitating observation of the fire situation.

[0035] Fire-resistant hinges and locks can still function normally in high-temperature environments, ensuring the stability and safety of the door.

[0036] The Class A steel insulated fire door of this utility model has significantly improved in terms of heat insulation performance, structural strength, sealing performance, durability and safety. It can effectively prevent the spread of fire, buy valuable time for personnel evacuation and fire rescue, and improve the overall fire safety performance of the building.

[0037] It should be noted that the accompanying drawings merely illustrate the technical concept of the present invention and should not be used to limit the scope of protection of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A Class A steel insulated fire door, comprising a door frame and a door leaf, characterized in that: The door frame has reinforcing ribs on its inner side and adopts a double-layer steel plate structure, which is filled with rock wool. The door leaf has a double-layer structure with a support frame at its edge. A door core panel is installed inside the support frame. Both sides of the door core panel are provided with cross-shaped reinforcing ribs, which are connected to the support frame. The space between the cross-shaped reinforcing ribs is filled with heat insulation material, which is composed of expanded perlite board in the middle and fireproof heat insulation felt on both sides.

2. The Class A steel insulated fire door according to claim 1, characterized in that: The door leaf is connected to the door frame on one side by a fireproof hinge and on the other side by a fireproof lock.

3. The Class A steel insulated fire door according to claim 1, characterized in that: An expansion-type sealing strip is installed around the door frame; a silicone rubber elastic sealing strip is provided around the door leaf.

4. A Class A steel insulated fire door according to claim 1, characterized in that: The steel plate thickness of the door frame is not less than 2mm, and the steel plate thickness of the door leaf is not less than 1.2mm.

5. A Class A steel insulated fire door according to claim 1, characterized in that: The inner and outer surfaces of the door leaf are coated with an intumescent fire-retardant coating. The intumescent fire-retardant coating can rapidly expand at high temperatures to form a heat-insulating foam layer, further improving the heat insulation performance and fire resistance time of the door leaf.

6. A Class A steel insulated fire door according to claim 1, characterized in that: The door is equipped with a fireproof glass observation window. The fireproof glass has a multi-layer composite structure, including a fireproof glass layer, a fireproof adhesive layer, and a heat insulation film layer.

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