Fireproof door core plate with heat insulation function
By introducing a connecting frame, airbag, and ammonium nitrate gas into the fire door core panel, the problem of insufficient sealing of the fire door core panel is solved, achieving good sealing effect and heat insulation performance, and improving the use effect of the fire door.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU KAIAO PURIFICATION TECH CO LTD
- Filing Date
- 2025-04-07
- Publication Date
- 2026-04-14
AI Technical Summary
Existing fire door core panels cannot provide good sealing during use, leading to smoke leakage and contamination of the outside of the fire door.
The design includes a connecting frame, an airbag, a reinforcing plate, and a heat insulation plate. The airbag is filled with ammonium nitrate gas, which decomposes at high temperature to produce nitrous oxide and water vapor, causing the airbag to expand and seal the fire door. The connecting frame is easy to disassemble and replace through a ball-and-groove structure.
It improves the sealing effect of fire doors, prevents smoke leakage, enhances the structural strength and heat insulation performance of the core board, and extends service life.
Smart Images
Figure CN224120145U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of fireproof door core panels, specifically a fireproof door core panel with heat insulation function. Background Technology
[0002] Fire-resistant door core panels are a key component in the manufacture of fire doors. They are typically made of fire-resistant materials or materials with fire-resistant properties to provide fire protection and heat insulation. The main function of fire-resistant door core panels is to block flames, smoke, and high temperatures during a fire, thereby extending evacuation time and reducing the spread of the fire.
[0003] Utility model patent CN216683620U discloses a novel fireproof door core panel. It includes a solid wood layer, a fireproof and heat-insulating layer, and a decorative layer. The solid wood layer is the innermost layer of the core panel. A first adhesive layer is placed outside the solid wood layer, and a fireproof and heat-insulating layer is fixedly connected to the first adhesive layer. A second adhesive layer is placed outside the fireproof and heat-insulating layer, and a decorative layer is fixedly connected to the second adhesive layer. Triangular steel corner brackets are provided on the core panel body, and these triangular steel corner brackets are fastened to the four corners of the core panel. This utility model utilizes a multi-layer plywood structure and uses multiple layers of fireproof materials as the core panel plywood, greatly improving fire resistance while reducing the weight of the door panel, thus possessing high economic value.
[0004] In existing technologies, the core panels of fire doors cannot provide a good seal for the fire door during use. In the event of a fire, smoke can escape through the fire door and contaminate the outside of the door. Therefore, improvements are needed. Utility Model Content
[0005] The purpose of this utility model is to provide a fire door core board with heat insulation function, which solves the problem that the core board cannot provide good sealing performance for the fire door.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a fireproof door core panel with heat insulation function, comprising a core panel, two symmetrically distributed connecting frames slidingly sleeved on the outer side of the core panel, the two connecting frames contacting each other, an airbag sleeved on the outer side of the connecting frame, the airbag being filled with ammonium nitrate gas, reinforcing plates contacting both the front and rear ends of the core panel, multiple evenly distributed bolts slidably sleeved inside the reinforcing plate, the bolts being threadedly connected to the core panel, a heat insulation plate slidingly sleeved inside the reinforcing plate, the heat insulation plate contacting the core panel, bolts 2 threadedly connected inside the heat insulation plate, the bolts 2 being movably connected to the reinforcing plate, and a connecting mechanism provided on the connecting frame.
[0007] Preferably, the core board has a screw hole inside, and a bolt is threaded into the screw hole. By designing the screw hole, the bolt can be connected to the core board.
[0008] Preferably, there are multiple bolts, which are evenly distributed on the reinforcing plate. By designing multiple bolts, the reinforcing plate and the heat insulation plate can be connected.
[0009] Preferably, the connecting mechanism includes a slide rod, which is slidably sleeved inside the core plate. A spring is provided on the outside of the slide rod, and a slider is fixedly connected to the outside of the slide rod. The slider is slidably connected to the core plate, and a retaining ball is movably sleeved inside the slider. The retaining ball is movably connected to the core plate and the connecting frame. Guide blocks are fixedly connected to both ends of the slider, and the guide blocks are slidably connected to the core plate. This connecting mechanism facilitates the disassembly of the connecting frame.
[0010] Preferably, one end of the spring is fixedly connected to the core plate, and the other end of the spring is fixedly connected to the slider. The spring is designed so that its force can be applied to the slider.
[0011] Preferably, the connecting frame has a groove inside, and a retaining ball is movably fitted inside the groove. The groove design allows the retaining ball to roll within it.
[0012] Preferably, the core board has a guide groove inside, and a guide block is slidably connected inside the guide groove. By designing the guide groove, the guide block can slide inside the guide groove.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] 1. This utility model, through the design of the reinforcing plate, can protect the outer side of the core board, improve the overall structural strength of the core board, and extend its service life. With the help of the heat insulation plate, the heat insulation effect of the core board can be improved, thus enhancing the performance of the fire door. Under the action of the airbag, the airbag is filled with ammonium nitrate gas. When a fire occurs, the temperature rises, and the ammonium nitrate gas decomposes into nitrous oxide and water vapor. The airbag will be filled with gas and expand. At this time, the airbag will press against the fire door frame, improving the sealing effect of the fire door and preventing smoke leakage.
[0015] 2. This utility model, through the design of the insertion of the ball and the groove, can connect and fix the connecting frame and the core plate. When the connecting frame is moved horizontally, the connecting frame can slide relative to the ball, and the connecting frame can squeeze and push the ball, which can realize the separation of the ball and the connecting frame. The connecting frame can be easily disassembled, which is convenient for the replacement and maintenance of the airbag. Attached Figure Description
[0016] Figure 1 This is a perspective view of the overall structure of this utility model;
[0017] Figure 2 This utility model Figure 1 A three-dimensional view of a partial structure of the core board;
[0018] Figure 3 This utility model Figure 2 A partial three-dimensional sectional view of the structure;
[0019] Figure 4 This utility model Figure 3 Enlarged view of point A;
[0020] Figure 5 This utility model Figure 3 A 3D view of the connecting frame.
[0021] In the diagram: 1. Core board; 2. Connecting frame; 3. Airbag; 4. Reinforcing plate; 5. Bolt 1; 6. Screw hole; 7. Heat insulation board; 8. Bolt 2; 9. Connecting mechanism; 91. Slide rod; 92. Spring; 93. Slider; 94. Ball catcher; 95. Groove; 96. Guide block; 97. Guide slot. Detailed Implementation
[0022] 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.
[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 A fireproof door core panel with heat insulation function includes a core panel 1. Two symmetrically distributed connecting frames 2 are slidably sleeved on the outer side of the core panel 1. The two connecting frames 2 are in contact with each other. An air bladder 3 is sleeved on the outer side of the connecting frame 2. The air bladder 3 is filled with ammonium nitrate gas. Both the front and rear ends of the core panel 1 are in contact with reinforcing plates 4. Multiple evenly distributed bolts 5 are slidably sleeved inside the reinforcing plates 4. The bolts 5 are threadedly connected to the core panel 1. A screw hole 6 is opened inside the core panel 1. The bolts 5 are threadedly connected inside the screw hole 6. By designing the screw hole 6, the bolts 5 can be connected to the core panel 1.
[0024] Please see Figure 1 , Figure 2 , Figure 3The heat insulation plate 7 is slidably sleeved inside the reinforcing plate 4. The heat insulation plate 7 is in contact with the core plate 1. Bolts 8 are connected inside the heat insulation plate 7 by threads. There are multiple bolts 8, which are evenly distributed on the reinforcing plate 4. By designing multiple bolts 8, the reinforcing plate 4 and the heat insulation plate 7 can be connected. The bolts 8 are movably connected to the reinforcing plate 4. A connecting mechanism 9 is provided on the connecting frame 2.
[0025] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 The connecting mechanism 9 includes a slide rod 91, which is slidably sleeved inside the core plate 1. A spring 92 is provided on the outside of the slide rod 91. One end of the spring 92 is fixedly connected to the core plate 1, and the other end is fixedly connected to the slider 93. By designing the spring 92, the force of the spring 92 can act on the slider 93. The slider 93 is fixedly connected to the outside of the slide rod 91 and is slidably connected to the core plate 1. A retaining ball 94 is movably sleeved inside the slider 93 and is movably connected to the core plate 1. The retaining ball 94 is connected to the connecting frame. 2. Movable connection: The inside of the connecting frame 2 is provided with a groove 95, and a retaining ball 94 is movably sleeved inside the groove 95. By designing the groove 95, the retaining ball 94 can roll inside the groove 95. The left and right ends of the slider 93 are fixedly connected with guide blocks 96. The guide blocks 96 are slidably connected to the core plate 1. The inside of the core plate 1 is provided with a guide groove 97, and the guide block 96 is slidably connected inside the guide groove 97. By designing the guide groove 97, the guide block 96 can slide inside the guide groove 97. By designing the connecting mechanism 9, it is convenient to disassemble the connecting frame 2.
[0026] The specific implementation process of this utility model is as follows: In use, with the cooperation of bolt 5 and screw hole 6, the reinforcing plate 4 and the core plate 1 can be connected and fixed. Under the action of the reinforcing plate 4, the outer side of the core plate 1 can be protected, the overall structural strength of the core plate 1 can be improved, and its service life can be increased. Under the action of bolt 8, the heat insulation plate 7 and the reinforcing plate 4 can be connected and fixed, which can improve the heat insulation effect of the core plate 1 and improve the performance of the fire door. Under the action of the airbag 3, the airbag 3 is filled with ammonium nitrate gas. When a fire occurs, the temperature rises. At this time, the ammonium nitrate gas decomposes into nitrous oxide and water vapor. The airbag 3 will be filled with gas and expand. At this time, the airbag 3 will press against the fire door frame, improve the sealing effect of the fire door, and prevent the leakage of smoke.
[0027] When it is necessary to disassemble the connecting frame 2, simply move the connecting frame 2 horizontally. The connecting frame 2 and the retaining ball 94 will slide relative to each other. The arc surface of the groove 95 inside the connecting frame 2 will squeeze the retaining ball 94, and the retaining ball 94 will roll into the core plate 1. The retaining ball 94 will push the slider 93 to move. The slider 93 will drive the guide block 96 to slide along the guide groove 97. At the same time, the slider 93 will drive the slide rod 91 to move. The slider 93 will squeeze the spring 92, which can separate the retaining ball 94 from the groove 95. Then the connecting frame 2 can be removed from the core plate 1, which is convenient for the replacement and maintenance of the airbag 3.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A fireproof door core board with heat insulation function, comprising a core board (1), characterized in that: Two symmetrically distributed connecting frames (2) are slidably sleeved on the outer side of the core plate (1), and the two connecting frames (2) are in contact with each other. An air bag (3) is sleeved on the outer side of the connecting frame (2), and the air bag (3) is filled with ammonium nitrate gas. The front and rear ends of the core plate (1) are in contact with reinforcing plates (4). Multiple evenly distributed bolts (5) are slidably sleeved inside the reinforcing plate (4), and the bolts (5) are threadedly connected to the core plate (1). A heat insulation plate (7) is slidably sleeved inside the reinforcing plate (4), and the heat insulation plate (7) is in contact with the core plate (1). Bolts (8) are threadedly connected inside the heat insulation plate (7), and bolts (8) are movably connected to the reinforcing plate (4). A connecting mechanism (9) is provided on the connecting frame (2).
2. A fireproof door core board with heat insulation function according to claim 1, characterized in that: The core plate (1) has a screw hole (6) inside, and a bolt (5) is threadedly connected inside the screw hole (6).
3. A fireproof door core board with heat insulation function according to claim 1, characterized in that: The number of bolts two (8) is multiple, and the multiple bolts two (8) are evenly distributed on the reinforcing plate (4).
4. A fireproof door core board with heat insulation function according to claim 1, characterized in that: The connecting mechanism (9) includes a slide rod (91), which is slidably sleeved inside the core plate (1). A spring (92) is provided on the outside of the slide rod (91). A slider (93) is fixedly connected to the outside of the slide rod (91). The slider (93) is slidably connected to the core plate (1). A retaining ball (94) is movably sleeved inside the slider (93). The retaining ball (94) is movably connected to the core plate (1) and to the connecting frame (2). Guide blocks (96) are fixedly connected to both ends of the slider (93). The guide blocks (96) are slidably connected to the core plate (1).
5. A fireproof door core board with heat insulation function according to claim 4, characterized in that: One end of the spring (92) is fixedly connected to the core plate (1), and the other end of the spring (92) is fixedly connected to the slider (93).
6. A fireproof door core board with heat insulation function according to claim 1, characterized in that: The connecting frame (2) has a groove (95) inside, and a retaining ball (94) is movably sleeved inside the groove (95).
7. A fireproof door core board with heat insulation function according to claim 1, characterized in that: The core plate (1) has a guide groove (97) inside, and a guide block (96) is slidably connected inside the guide groove (97).