A reinforced fire door structure
By introducing sealing structures and automatic fire extinguishing devices into fire doors, the problems of sealing door gaps and extinguishing fires are solved, enabling effective blocking of flames and smoke during a fire and ensuring the safety of the fire door structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING MEXIN MESSON DOORS IND CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-19
AI Technical Summary
Existing fire doors cannot effectively seal gaps during use, allowing flames and smoke to spread. Furthermore, the lack of fire extinguishing devices may cause them to deform and fail under high temperatures, making them unable to effectively contain the fire.
The door gaps are sealed by using a combination of sealing strips, compression blocks, limit rods, springs, L-shaped push plates, movable blocks, and inclined grooves; and an automatic fire extinguishing device is installed by combining support plates, electric telescopic rods, lifting columns, racks, gears, rotating columns, rotating plates, and sealing plates.
It effectively seals door gaps during a fire, preventing the spread of flames, and automatically activates fire extinguishing in the early stages of a fire to quickly extinguish the flames and ensure that safe areas are not affected.
Smart Images
Figure CN224379706U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire door technology, specifically to a reinforced fire door structure. Background Technology
[0002] In high-rise buildings, refuge floors are safe areas where people can temporarily escape the fire and smoke during a fire. Reinforced fire doors can effectively prevent the fire from spreading to refuge floors, providing people with a safe space and ensuring the safety of their lives.
[0003] The existing technology has the following problems:
[0004] The existing system cannot seal the gap between the two doors when they are closed. When the gap is not sealed, the high-temperature airflow and flames generated by a fire can spread rapidly to the other side through the gap, causing the fire door to lose its function of blocking the fire. In stairwells or fire compartments, smoke and flames may spread to safe areas through the gap, threatening personnel evacuation and building safety. In addition, the existing system does not have a fire extinguishing device when a fire starts. Fire doors without a fire extinguishing device rely solely on their own fire resistance performance, but they may deform or fail to seal due to the impact of hot airflow or localized combustion under high temperatures. Utility Model Content
[0005] This utility model provides a reinforced fire door structure to solve the problems existing in the background art.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0007] A reinforced fire door structure includes a door frame, a fire extinguishing box fixedly connected to the front side of the door frame, a first connecting door rotatably connected to the front side of the door frame, a second connecting door rotatably connected to the front side of the door frame, two door closers provided at the upper front end of the door frame, one of the door closers having its other end fixedly connected to the second connecting door, and a sliding groove provided on the front side of the second connecting door.
[0008] A further improvement of this utility model is that: a sealing strip is fixedly connected to the inner surface of the first connecting door, a plurality of limiting rods are fixedly connected to the inner surface of the second connecting door, a pressing block is slidably connected to the outer wall of the limiting rod, a spring is sleeved on the outer wall of the limiting rod, one end of the spring is fixedly connected to the second connecting door, the other end of the spring is fixedly connected to the pressing block, and the right side of the pressing block is movably connected to the sealing strip.
[0009] A further improvement of this utility model is that: a movable groove is provided on the left side of the extrusion block, a movable block is slidably connected to the inner surface of the movable groove, an inclined groove is provided through the front side of the movable block, a guide post is fixedly connected to the inner surface of the movable groove, the outer wall of the guide post is slidably connected to the inclined groove, an L-shaped push plate is fixedly connected to the upper side of the movable block, the outer wall of the L-shaped push plate is slidably connected to the sliding groove, and the outer wall of the extrusion block is slidably connected to the second connecting door.
[0010] A further improvement of this utility model is that: a support plate is fixedly connected to the left side of the fire extinguishing box, an electric telescopic rod is fixedly connected to the lower side of the support plate, a lifting column is fixedly connected to the output end of the electric telescopic rod, and racks are fixedly connected to both the front and rear sides of the lifting column.
[0011] A further improvement of this utility model is that: gears are meshed on opposite sides of the two racks, a rotating column is fixedly connected to the right side of the gears, and the outer wall of the rotating column is rotatably connected to the fire extinguishing box.
[0012] A further improvement of this utility model is that: a rotating plate is fixedly connected to the outer wall of the rotating column, the outer wall of the rotating plate is rotatably connected to the fire extinguishing box, a sealing plate is fixedly connected to the inner surface of the fire extinguishing box, and the lower side of the sealing plate is movably connected to the rotating plate.
[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:
[0014] 1. This utility model provides a reinforced fire door structure. Through the cooperation of sealing strips, extrusion blocks, limit rods, springs, L-shaped push plates, movable blocks, inclined grooves and movable slots, the gap between the two doors when closed can be sealed. The sealed gap can prevent flames from penetrating to the other side through the door gap, ensuring that the fire door can effectively separate the fire area from the safe area in a fire.
[0015] 2. This utility model provides a reinforced fire door structure, which is equipped with a fire extinguishing device through the cooperation of a support plate, an electric telescopic rod, a lifting column, a rack, a gear, a rotating column, a rotating plate and a sealing plate. The fire extinguishing device can be automatically activated in the early stage of a fire, directly spraying fire extinguishing agent at the fire source to quickly extinguish the flames, prevent the fire from spreading, and prevent the fire from spreading to critical equipment. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a partial structural cross-sectional schematic diagram of the present invention;
[0018] Figure 3 for Figure 2Enlarged schematic diagram of the structure at point A in the middle;
[0019] Figure 4 This is a partial structural schematic diagram of the present invention;
[0020] Figure 5 This is a schematic diagram of the important structure of this utility model.
[0021] In the diagram: 1. Door frame; 2. First connecting door; 3. Second connecting door; 4. Door closer; 5. Fire extinguisher box; 6. Slide groove; 7. Sealing strip; 8. Pressing block; 9. Limiting rod; 10. Spring; 11. L-shaped push plate; 12. Movable block; 13. Inclined groove; 14. Movable groove; 15. Guide column; 16. Support plate; 17. Electric telescopic rod; 18. Lifting column; 19. Rack; 20. Gear; 21. Rotating column; 22. Rotating plate; 23. Sealing plate. Detailed Implementation
[0022] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments:
[0023] like Figure 1 As shown, this utility model provides a reinforced fire door structure, including a door frame 1. A fire extinguishing box 5 is fixedly connected to the front side of the door frame 1. A first connecting door 2 and a second connecting door 3 are rotatably connected to the front side of the door frame 1. Two door closers 4 are provided at the upper front side of the door frame 1, with the other end of one of the door closers 4 fixedly connected to the second connecting door 3. A sliding groove 6 is provided on the front side of the second connecting door 3. The door frame 1 serves as the basic frame of the fire door. The fire extinguishing box 5 is fixedly connected to the front side for fire extinguishing. The first connecting door 2 and the second connecting door 3 are rotatably connected to the front side to realize the opening and closing function of the door. One of the two door closers 4 provided at the upper front side of the door frame 1 is fixed to the second connecting door 3 and can automatically close after the door is opened to ensure that the door is in the closed state and maintain the fire separation function. The sliding groove 6 provided on the front side of the second connecting door 3 provides guiding space for the movement of subsequent structural components.
[0024] like Figure 2-3As shown, this utility model provides a technical solution: Preferably, a sealing strip 7 is fixedly connected to the inner surface of the first connecting door 2, and a plurality of limiting rods 9 are fixedly connected to the inner surface of the second connecting door 3. A pressing block 8 is slidably connected to the outer wall of the limiting rod 9, and a spring 10 is sleeved on the outer wall of the limiting rod 9. One end of the spring 10 is fixedly connected to the second connecting door 3, and the other end of the spring 10 is fixedly connected to the pressing block 8. The right side of the pressing block 8 is movably connected to the sealing strip 7, and a movable groove 14 is opened on the left side of the pressing block 8. A movable block 12 is slidably connected to the inner surface of the movable groove 14. A slanted groove 13 is opened through the front side of the movable block 12. A guide post 15 is fixedly connected to the inner surface of the movable groove 14, and the outer wall of the guide post 15 is slidably connected to the slanted groove 13. An L-shaped push plate 11 is fixedly connected to the upper side of the movable block 12, and the outer wall of the L-shaped push plate 11 is slidably connected to the sliding groove 13. The groove 6 is slidably connected, and the outer wall of the extrusion block 8 is slidably connected to the second connecting door 3. When the first connecting door 2 and the second connecting door 3 are closed, the spring 10 will drive the extrusion block 8 to move. The sealing strip 7 on the inner surface of the first connecting door 2 contacts the extrusion block 8 on the inner surface of the second connecting door 3 to seal the gap, which can effectively prevent flames from penetrating through the door gap and ensure the function of the fire door in separating the fire area and the safe area in a fire. When it is necessary to open the two doors, the L-shaped push plate 11 can be pushed upward. The L-shaped push plate 11 slides in the groove 6, driving the movable block 12 to move in the movable groove 14. Due to the sliding cooperation between the guide post 15 and the inclined groove 13 on the movable block 12, when the movable block 12 moves, it will push the extrusion block 8 to slide away from the sealing strip 7 along the limit rod 9, compressing the spring 10. Finally, the extrusion block 8 will disengage from the sealing strip 7, and the two doors can be opened.
[0025] like Figure 4-5 As shown, this utility model provides a technical solution: Preferably, a support plate 16 is fixedly connected to the left side of the fire extinguishing box 5, an electric telescopic rod 17 is fixedly connected to the lower side of the support plate 16, a lifting column 18 is fixedly connected to the output end of the electric telescopic rod 17, racks 19 are fixedly connected to both the front and rear sides of the lifting column 18, gears 20 are meshed on opposite sides of the two racks 19, a rotating column 21 is fixedly connected to the right side of the gear 20, the outer wall of the rotating column 21 is rotatably connected to the fire extinguishing box 5, a rotating plate 22 is fixedly connected to the outer wall of the rotating column 21, the outer wall of the rotating plate 22 is rotatably connected to the fire extinguishing box 5, and the inner surface of the fire extinguishing box 5 is fixed. A sealing plate 23 is connected, and the lower side of the sealing plate 23 is movably connected to the rotating plate 22. In the early stage of a fire, the electric telescopic rod 17 is activated, and its output end drives the lifting column 18 to move up and down. The racks 19 on the front and rear sides of the lifting column 18 move with the lifting column 18 and mesh with the gear 20 to drive the gear 20 to rotate. The rotation of the gear 20 drives the rotating column 21 and the rotating plate 22 fixed on its outer wall to rotate. The rotating plate 22 rotates and disengages from the sealing plate 23, thereby opening the fire extinguishing box 5. The fire extinguishing agent in the fire extinguishing box 5 can be directly sprayed at the fire source to quickly extinguish the flames, prevent the fire from spreading, and prevent the fire from spreading to critical equipment.
[0026] The working principle of this reinforced fire door structure will be explained in detail below.
[0027] like Figure 1-5 As shown, when the first connecting door 2 and the second connecting door 3 are closed, the spring 10 will drive the pressing block 8 to move. The sealing strip 7 on the inner surface of the first connecting door 2 will contact the pressing block 8 on the inner surface of the second connecting door 3 to seal the gap, effectively preventing flames from penetrating through the door gap and ensuring the fire door's function of separating the fire zone from the safe zone during a fire. When it is necessary to open both doors, the L-shaped push plate 11 can be pushed upwards. The L-shaped push plate 11 slides in the slide groove 6, driving the movable block 12 to move in the movable groove 14. Due to the sliding cooperation between the guide post 15 and the inclined groove 13 on the movable block 12, when the movable block 12 moves, it will push the pressing block 8 away from the sealing strip 7 along the limit rod 9. The seal 7 slides in the direction of compression, compressing the spring 10. Finally, the squeezing block 8 is separated from the seal 7, and the two doors can be opened. In the early stage of the fire, the electric telescopic rod 17 is activated, and its output end drives the lifting column 18 to move up and down. The racks 19 on the front and rear sides of the lifting column 18 move with the lifting column 18 and mesh with the gear 20 to drive the gear 20 to rotate. The rotation of the gear 20 drives the rotating column 21 and the rotating plate 22 fixed on its outer wall to rotate. The rotating plate 22 rotates and disengages from the sealing plate 23, thereby opening the fire extinguishing box 5. The fire extinguishing agent in the fire extinguishing box 5 can be directly sprayed at the fire source to quickly extinguish the flames, prevent the fire from spreading, and prevent the fire from spreading to critical equipment.
[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A reinforced fire door structure, characterized in that: Includes a door frame (1), a fire extinguishing box (5) is fixedly connected to the front side of the door frame (1), a first connecting door (2) is rotatably connected to the front side of the door frame (1), a second connecting door (3) is rotatably connected to the front side of the door frame (1), two door closers (4) are provided at the upper front side of the door frame (1), one of the door closers (4) is fixedly connected to the second connecting door (3) at the other end, and a sliding groove (6) is provided on the front side of the second connecting door (3).
2. The reinforced fire door structure according to claim 1, characterized in that: A sealing strip (7) is fixedly connected to the inner surface of the first connecting door (2), and a plurality of limiting rods (9) are fixedly connected to the inner surface of the second connecting door (3). A pressing block (8) is slidably connected to the outer wall of the limiting rod (9), and a spring (10) is sleeved on the outer wall of the limiting rod (9). One end of the spring (10) is fixedly connected to the second connecting door (3), and the other end of the spring (10) is fixedly connected to the pressing block (8). The right side of the pressing block (8) is movably connected to the sealing strip (7).
3. The reinforced fire door structure according to claim 2, characterized in that: The left side of the extrusion block (8) is provided with a movable groove (14), the inner surface of the movable groove (14) is slidably connected to a movable block (12), the front side of the movable block (12) is provided with a through groove (13), the inner surface of the movable groove (14) is fixedly connected to a guide post (15), the outer wall of the guide post (15) is slidably connected to the through groove (13), the upper side of the movable block (12) is fixedly connected to an L-shaped push plate (11), the outer wall of the L-shaped push plate (11) is slidably connected to a sliding groove (6), and the outer wall of the extrusion block (8) is slidably connected to the second connecting door (3).
4. The reinforced fire door structure according to claim 1, characterized in that: A support plate (16) is fixedly connected to the left side of the fire extinguishing box (5), an electric telescopic rod (17) is fixedly connected to the lower side of the support plate (16), a lifting column (18) is fixedly connected to the output end of the electric telescopic rod (17), and racks (19) are fixedly connected to both the front and rear sides of the lifting column (18).
5. The reinforced fire door structure according to claim 4, characterized in that: The two racks (19) are meshed with gears (20) on opposite sides. A rotating column (21) is fixedly connected to the right side of the gear (20). The outer wall of the rotating column (21) is rotatably connected to the fire extinguishing box (5).
6. The reinforced fire door structure according to claim 5, characterized in that: A rotating plate (22) is fixedly connected to the outer wall of the rotating column (21). The outer wall of the rotating plate (22) is rotatably connected to the fire extinguishing box (5). A sealing plate (23) is fixedly connected to the inner surface of the fire extinguishing box (5). The lower side of the sealing plate (23) is movably connected to the rotating plate (22).