A type of concealed fire door with flush frame and leaf openings
By combining a flush frame and sash design with multiple layers of insulation materials, the problem of insufficient aesthetics and insulation performance of traditional fire doors is solved, achieving integration with modern architectural styles and efficient sealing and insulation effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG ZHONGJIAN FIRE FIGHTING TECH CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-06-02
AI Technical Summary
Traditional fire door frames and leaves have uneven openings, which affects aesthetics and results in insufficient heat insulation and sealing performance.
The door features a flush frame and sash design, combined with concealed hinges and multiple layers of insulation. Aerogel felt, rock wool board, and glass wool board are used as insulation materials, and concealed door handles and sealing strips are installed on the door panel surface.
It achieves integration with modern architectural styles, enhances aesthetics and sealing, while significantly improving thermal insulation performance and providing good concealment and fire resistance.
Smart Images
Figure CN224314859U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire door technology, specifically a concealed fire door with flush frame and leaf openings. 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 installed in fire-resistant partitions such as fire compartments, evacuation stairwells, and vertical shafts. In buildings, 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] Traditional fire doors have many shortcomings. For example, the frame and leaf openings are usually not flush, which is visually obtrusive and difficult to integrate with the overall decoration style of modern buildings, affecting the aesthetics of the interior space. In addition, the heat insulation and sealing performance of existing fire doors need to be further improved. Therefore, it is necessary to design and renovate concealed fire doors with flush frame and leaf openings to effectively prevent them from having poor performance. Utility Model Content
[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide a flush-mounted, concealed fire door with advantages such as aesthetics, good concealment, good sealing, and good heat insulation. This solves many shortcomings of traditional fire doors, such as the fact that the frame and leaf openings are usually not flush, which is visually obtrusive and difficult to integrate with the overall decoration style of modern buildings, affecting the aesthetics of the interior space. In addition, existing fire doors also need further improvement in terms of heat insulation and sealing performance.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a flush-mounted concealed fire door with a door frame, comprising a door frame, door panels hinged to both sides of the door frame via concealed hinges, a mounting groove provided on the surface of the door panel, and a sealing strip fixedly connected inside the mounting groove, the sealing strip fitting against the door frame, concealed door handles provided on both the front and back of the door panel, the door panel comprising a support frame, wooden boards fixedly connected to both the front and back of the support frame, a first heat insulation layer fixedly connected to the front of the inner wall of the support frame, a second heat insulation layer fixedly connected to the back of the first heat insulation layer, and a third heat insulation layer fixedly connected to the back of the second heat insulation layer, both the second and third heat insulation layers being fixedly connected to the support frame.
[0006] As a preferred embodiment of this utility model, the concealed door handle includes a groove provided on the surface of the door panel, and a baffle is fixedly connected inside the groove. Both sides of the inner wall of the groove are provided with circular slots. A movable plate is rotatably connected inside the circular slots. A torsion spring is fixedly connected to the surface of the movable plate. The end of the torsion spring away from the movable plate is fixedly connected to the inner wall of the circular slot.
[0007] As a preferred embodiment of this invention, the first heat insulation layer is cut from aerogel felt.
[0008] As a preferred embodiment of this invention, the second heat insulation layer is cut from rock wool board.
[0009] As a preferred embodiment of this invention, the third heat insulation layer is cut from glass wool board.
[0010] As a preferred embodiment of this invention, the side of the wooden board away from the support frame is coated with a fire-retardant coating.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] 1. This utility model adopts a flush frame and door panel design, using concealed hinges to connect the door frame and door panel, ensuring that the front of the door frame and the front of the door panel are on the same plane and parallel to the wall. This allows it to blend seamlessly into the overall decoration style of modern buildings, avoiding the visual abruptness caused by uneven frame and door panel openings in traditional fireproof doors. This greatly enhances the aesthetics of the building's interior space and achieves an excellent concealed effect. By setting an installation groove on the door panel surface and fixing a fireproof sealing strip within the groove, the sealing performance of the device is effectively improved. The multiple insulation layers work together to greatly enhance the heat insulation performance of the device. This device has the advantages of being aesthetically pleasing, having a good concealed effect, good sealing effect, and good heat insulation effect.
[0013] 2. This utility model, through the setting of a concealed door handle, allows the operator to push the movable plate to the back, thereby causing the movable plate to rotate, which in turn causes the torsion spring to rotate. At this time, the operator inserts their hand into the groove, holds the baffle, and then pulls the door panel to the front in some special situations. The door panel in this device can rotate and open and close in the front and back directions. Through the setting of the torsion spring, the movable plate can be reset when the operator releases it. The door panel and the door frame are both sprayed with decorative paint, thereby improving the concealment effect of the device. At the same time, an automatic door closer is installed between the door frame and the door panel, so that the door panel of the device is in a closed state when not subjected to external force. The door frame is made of steel. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a cross-sectional view of the door panel structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the door panel structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the movable plate structure of this utility model;
[0018] Figure 5 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle;
[0019] Figure 6 This utility model Figure 4 Enlarged schematic diagram of the structure at point B.
[0020] In the diagram: 1. Door frame; 2. Door panel; 3. Concealed door handle; 4. Support frame; 5. First insulation layer; 6. Second insulation layer; 7. Third insulation layer; 8. Wood board; 9. Mounting groove; 10. Sealing strip; 11. Groove; 12. Baffle; 13. Round hole groove; 14. Movable plate; 15. Torsion spring. 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] like Figures 1 to 6 As shown, a flush-mounted concealed fire door includes a door frame 1. Door panels 2 are hinged to both sides of the door frame 1 via concealed hinges. The surface of the door panel 2 is provided with a mounting groove 9, and a sealing strip 10 is fixedly connected inside the mounting groove 9. The sealing strip 10 is fitted to the door frame 1. Concealed door handles 3 are provided on both the front and back of the door panel 2. The door panel 2 includes a support frame 4. Wooden boards 8 are fixedly connected to both the front and back of the support frame 4. A first heat insulation layer 5 is fixedly connected to the front of the inner wall of the support frame 4. A second heat insulation layer 6 is fixedly connected to the back of the first heat insulation layer 5. A third heat insulation layer 7 is fixedly connected to the back of the second heat insulation layer 6. Both the second heat insulation layer 6 and the third heat insulation layer 7 are fixedly connected to the support frame 4.
[0023] refer to Figure 1 The concealed door handle 3 includes a groove 11 set on the surface of the door panel 2, and a baffle 12 is fixedly connected inside the groove 11. Both sides of the inner wall of the groove 11 are provided with round hole grooves 13. A movable plate 14 is rotatably connected inside the round hole groove 13. A torsion spring 15 is fixedly connected to the surface of the movable plate 14. The end of the torsion spring 15 away from the movable plate 14 is fixedly connected to the inner wall of the round hole groove 13.
[0024] As a technical optimization of this utility model, by setting the hidden door handle 3, the operator can push the movable plate 14 to the back, thereby driving the movable plate 14 to rotate, and then driving the torsion spring 15 to rotate. At this time, the operator inserts his hand into the groove 11, and then holds the baffle 12, and then pulls the door panel 2 to the front in some special cases. The door panel 2 in this device can be rotated and opened and closed in the front and back directions. By setting the torsion spring 15, the movable plate 14 can be reset when the operator releases it.
[0025] refer to Figure 2 The first insulation layer 5 is cut from aerogel felt.
[0026] As a technical optimization of this utility model, the first heat insulation layer 5, which is cut from aerogel felt, has the advantages of good heat insulation effect and light weight.
[0027] refer to Figure 2 The second insulation layer 6 is cut from rock wool board.
[0028] As a technical optimization of this utility model, the second insulation layer 6, which is cut from rock wool board, has an extremely low thermal conductivity, which can effectively prevent heat transfer, reduce energy loss in buildings, and achieve good thermal insulation effect. This helps to reduce energy consumption and save energy. Rock wool board is a non-combustible material with a fire rating of Class A. It can remain stable under high temperature and open flame, does not burn, and does not produce toxic gases. It can effectively prevent the spread of fire and buy time for personnel evacuation and fire rescue.
[0029] refer to Figure 2 The third insulation layer 7 is cut from glass wool board.
[0030] As a technical optimization of this utility model, the third insulation layer 7, which is cut from glass wool board, has an extremely low thermal conductivity, which can effectively reduce heat transfer, significantly reduce building energy consumption, and help maintain stable indoor temperature. Whether in cold winter or hot summer, it can play a good role in heat preservation and insulation, providing people with a comfortable indoor environment.
[0031] refer to Figure 1 The side of the wooden board 8 away from the support frame 4 is coated with a fire-retardant coating.
[0032] As a technical optimization of this utility model, a fire-retardant coating is sprayed onto the surface of the wooden board 8. When exposed to high temperatures, the fire-retardant coating will undergo reactions such as expansion or carbonization to form a heat insulation layer, which can effectively slow down the burning rate of the wooden board 8, reduce the speed of fire spread when a fire occurs, and buy more time for personnel evacuation and fire rescue. After the fire-retardant coating treatment, the fire resistance limit of the wooden board 8 is improved, enabling it to withstand the effects of flames and high temperatures for a certain period of time, maintain structural integrity, and reduce the damage of fire to buildings.
[0033] The working principle and usage process of this utility model are as follows: In use, this application improves the sealing performance of the device by setting the mounting groove 9 and the sealing strip 10, thereby reducing the penetration of dense smoke through the door panel 2. The mounting groove 9 is square and is distributed on the top, bottom, left and right sides of the door panel 2. The sealing strip 10 has a fireproof function. By making the front of the door frame 1 and the front of the door panel 2 the same plane, and by using the invisible hinge in the prior art to connect the door frame 1 and the door panel 2, the frame and door openings are flush and parallel to the wall, achieving the purpose of achieving an invisible effect and making the fire door more beautiful. The setting of the support frame 4 can improve the structural strength of the door panel 2, and the setting of multiple heat insulation layers can improve the heat insulation effect of the device.
[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0035] 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 flush fire door comprising a door frame (1), characterized in that: Both sides of the door frame (1) are hinged with door panels (2) by invisible hinges. The surface of the door panel (2) is provided with a mounting groove (9), and a sealing strip (10) is fixedly connected inside the mounting groove (9). The sealing strip (10) is in contact with the door frame (1). The front and back of the door panel (2) are provided with invisible door handles (3). The door panel (2) includes a support frame (4). The front and back of the support frame (4) are fixedly connected with wooden boards (8). The front of the inner wall of the support frame (4) is fixedly connected with a first heat insulation layer (5). The back of the first heat insulation layer (5) is fixedly connected with a second heat insulation layer (6). The back of the second heat insulation layer (6) is fixedly connected with a third heat insulation layer (7). The second heat insulation layer (6) and the third heat insulation layer (7) are both fixedly connected to the support frame (4).
2. A flush hidden fire door with frame and fanlight according to claim 1, characterized in that: The concealed door handle (3) includes a groove (11) provided on the surface of the door panel (2), and a baffle (12) is fixedly connected inside the groove (11). Both sides of the inner wall of the groove (11) are provided with round hole grooves (13). A movable plate (14) is rotatably connected inside the round hole groove (13). A torsion spring (15) is fixedly connected to the surface of the movable plate (14). The end of the torsion spring (15) away from the movable plate (14) is fixedly connected to the inner wall of the round hole groove (13).
3. A flush hidden fire door with frame and fanlight according to claim 1, characterized in that: The first heat insulation layer (5) is cut from aerogel felt.
4. A concealed fire door with flush frame and leaf openings as described in claim 1, characterized in that: The second insulation layer (6) is cut from rock wool board.
5. A concealed fire door with flush frame and leaf openings as described in claim 1, characterized in that: The third insulation layer (7) is cut from glass wool board.
6. A concealed fire door with flush frame and leaf openings as described in claim 1, characterized in that: The side of the wooden board (8) away from the support frame (4) is coated with a fire-retardant coating.