Modular steel fireproof door with high sealing performance
By using modular design and sealing rings, the problem of functional loss of fire doors due to human damage or modification is solved, achieving high sealing performance and convenient plate replacement, thus ensuring the fire-resistant effect and overall performance of the fire doors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU FUYANG JIANDUN DOOR & WINDOW TECH CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-05-12
AI Technical Summary
Existing steel fire doors are easily damaged by human violence or illegal modifications, causing them to lose their fire-blocking function and making it impossible to effectively maintain their fire resistance.
The high-sealing fire door adopts a modular design, which is composed of multiple panels. The positioning frame and sealing ring are used to ensure the airtightness, and the panels are connected and fixed with studs. The panels can be replaced individually when damaged.
This achieves high sealing and fire-resistant performance of fire doors, reduces maintenance costs, facilitates the replacement of damaged panels, and ensures that the overall function of the fire door is not affected.
Smart Images

Figure CN224228555U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire door technology, specifically to a high-sealing modular steel fire door. Background Technology
[0002] Steel fire doors are doors that can meet the requirements of fire resistance stability, integrity, and heat 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 spaces. In addition to the functions of ordinary doors, fire doors also prevent the spread of fire and smoke, thus ensuring the safe evacuation of personnel for a certain period of time.
[0003] However, modern steel fire doors are designed as a single unit. In public places (such as shopping malls and stairwells), fire doors may be damaged by human violence (such as prying locks or impacts), or by illegally installing peepholes, doorbells, etc. on fire doors, which can damage the fire-resistant structure of the door and cause it to lose its fire-blocking function or affect its fire-blocking function in a fire. Summary of the Invention
[0004] The technical problem to be solved by this utility model is to provide a high-sealing modular steel fire door. The modular design of the fire door allows for direct replacement of damaged panels, thereby solving the problems mentioned in the background art.
[0005] This utility model is achieved through the following technical solution: a high-sealing modular steel fire door, including a positioning frame and multiple sets of modularly arranged horizontal plates. Each set of horizontal plates is composed of two plates. Multiple sets of horizontal plates are combined to form a fire door. The positioning frame is fitted onto the outside of the fire door, and the inner side of the positioning frame abuts against the outer side of the fire door. The opposite sides of the plates protrude to form a first side plate. The opposite sides of the uppermost and lowermost plates protrude to form a second side plate. The first side plate and the second side plate are combined to form a side frame. One side of the positioning frame abuts against the side frame.
[0006] As a preferred technical solution, a first frame-shaped groove is formed by recessing the middle of the side of the plate. A first sealing ring is installed in each of the first frame-shaped grooves, and adjacent first sealing rings are abutted against each other. A second frame-shaped groove is provided on the side of the positioning frame facing the side frame. A second sealing ring is installed in the second frame-shaped groove, and one side of the second sealing ring abuts against the inner side of the side frame.
[0007] As a preferred technical solution, multiple first slots are provided on one side of the plate, and adjacent plates protrude to form first inserts at the first slots. The first inserts are inserted into the corresponding first slots, and the first inserts are distributed laterally.
[0008] As a preferred technical solution, the topmost plate has multiple second slots on one side of the remaining plates, and the bottommost plate has a second insert plate protruding from one side of the remaining plates. The second insert plates are inserted into the corresponding second slots, and the second slots and second insert plates are both distributed longitudinally.
[0009] As a preferred technical solution, the top and bottom horizontal plates are provided with first arc-shaped grooves at both ends, and the four corners of the inner side of the frame are provided with second arc-shaped grooves. The first arc-shaped grooves and the second arc-shaped grooves are combined to form mounting grooves. A first connector is installed on the inner wall of the first arc-shaped groove, and a second connector is provided on the inner wall of the second arc-shaped groove. The first connector and the second connector are combined to form studs, and nuts are threaded onto the outside of the studs.
[0010] As a preferred technical solution, both the sheet metal and the positioning frame are made of cold-rolled steel sheet.
[0011] The beneficial effects of this utility model are: the utility model has a simple structure, and the fire door is composed of multiple plates, so that after damage, only the corresponding plates need to be replaced, which reduces the cost. The fire-resistant effect is ensured by the replacement method. Furthermore, the sealing between adjacent plates is increased by the first sealing ring, and the sealing on the side of the plates is increased by the second sealing ring, which ensures the fire-resistant effect. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0014] Figure 2 This is a side view of the present invention;
[0015] Figure 3 This is a schematic diagram of the structure of this utility model after removing the positioning frame;
[0016] Figure 4 This is an exploded view of the horizontal plate of this utility model;
[0017] Figure 5 This is a schematic diagram of the positioning frame of this utility model.
[0018] The components are: 1. Plate; 2. Side frame; 3. Positioning frame; 4. Mounting groove; 5. Stud; 6. Nut; 7. First side plate; 8. Second side plate; 9. First sealing ring; 10. First frame groove; 11. First slot; 12. First insert plate; 13. Second slot; 14. Second insert plate; 15. Second sealing ring. Detailed Implementation
[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0020] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.
[0021] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this utility model discloses a high-sealing modular steel fire door, which includes a positioning frame 3 and multiple sets of modularly arranged horizontal plates. Each set of horizontal plates consists of two plates 1. The multiple sets of horizontal plates are combined to form a fire door. The positioning frame 3 is fitted onto the outside of the fire door, and the inner side of the positioning frame 3 abuts against the outer side of the fire door. The opposite sides of the plates 1 protrude to form a first side plate 7. The opposite sides of the uppermost and lowermost plates 1 protrude to form a second side plate 8. The first side plate 7 and the second side plate 8 are combined to form a side frame 2. One side of the positioning frame 3 abuts against the side frame 2.
[0023] In this embodiment, the middle of the side of the plate 1 is recessed to form a first frame groove 10. A first sealing ring 9 is installed in each of the first frame grooves 10. Adjacent first sealing rings 9 are abutted against each other. A second frame groove is provided on the side of the positioning frame 3 facing the side frame 2. A second sealing ring 15 is installed in the second frame groove. One side of the second sealing ring 15 abuts against the inner side of the side frame 2.
[0024] The first and second sealing rings are both made of flame-retardant rubber material, which ensures both sealing performance and flame-retardant effect.
[0025] In this embodiment, a plurality of first slots 11 are provided on one side of the plate 1. Adjacent plates 1 protrude from the first slots 11 to form first insert plates 12. The first insert plates 12 are inserted into the corresponding first slots 11. The first insert plates 12 are distributed laterally.
[0026] In this embodiment, the uppermost plate 1 and the remaining plate 1 are provided with a plurality of second slots 13 on one side surface. The lowermost plate 1 and the remaining plate 1 are provided with a second insert plate 14 protruding from one side surface. The second insert plates 14 are all inserted into the corresponding second slots 13. The second slots 13 and the second insert plates 14 are both longitudinally distributed.
[0027] In this embodiment, the uppermost and lowermost horizontal plates are provided with first arc-shaped grooves at both ends, and second arc-shaped grooves are provided at the four corners of the inner side of the frame. The first arc-shaped grooves and the second arc-shaped grooves are combined to form mounting grooves 4. A first connector is installed on the inner wall of the first arc-shaped groove, and a second connector is provided on the inner wall of the second arc-shaped groove. The first connector and the second connector are combined to form studs 5, and nuts 6 are threaded to the outside of the studs 5.
[0028] The second connector is cylindrical, while the first connector has multiple fan-shaped notches. The first connector matches the notches, so the two can be combined to form a stud.
[0029] In this embodiment, both the plate 1 and the positioning frame 3 are made of cold-rolled steel plate, and the interior of the plate is filled with fireproof filling material to increase the fire-resistant effect.
[0030] During installation, first insert the first insert plate on the board into the first slot of the adjacent board to form a horizontal board by combining the boards laterally. Then place the horizontal board up and down so that the second insert plate on the board is inserted into the second slot of the adjacent board. The board can be positioned laterally by the insertion between the first slot and the first insert plate, and the board can be positioned longitudinally by the insertion between the second slot and the second insert plate. The first sealing ring can ensure the sealing between the adjacent boards.
[0031] After the above splicing is completed, the positioning frame is placed on the outside of the fire door. The positioning frame can press the plate inward and fix it until the second sealing ring is in contact with the inner side of the side frame. The side frame, positioning frame and second sealing ring can ensure the sealing of the side of the fire door to ensure the subsequent fire-resistant effect.
[0032] Once the positioning frame is installed in place, the nut can be threaded onto the stud to fix the positioning frame in place and prevent it from loosening.
[0033] Because of the modular design of the panels, if any panel is damaged, only that panel needs to be replaced, without having to change the entire fire door. The fire-resistant effect is ensured by replacing the panel.
[0034] When replacing, remove the nut from the stud. After the nut is removed, the positioning frame can be removed from the fire door. After the positioning frame is removed, the panels can be separated directly for easy replacement.
[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.
Claims
1. A modular steel fire door with high sealing performance, characterized in that: The fire door is formed by combining a positioning frame (3) and multiple sets of modularly configured horizontal plates. Each set of horizontal plates consists of two plates (1). The multiple sets of horizontal plates are combined to form a fire door. The positioning frame (3) is fitted onto the outside of the fire door, and the inner side of the positioning frame (3) is in contact with the outer side of the fire door. The opposite sides of the plates (1) protrude to form a first side plate (7). The opposite sides of the uppermost and lowermost plates (1) protrude to form a second side plate (8). The first side plate (7) and the second side plate (8) are combined to form a side frame (2). One side of the positioning frame (3) is in contact with the side frame (2).
2. The high-sealing modular steel fire door according to claim 1, characterized in that: The middle of the side of the plate (1) is recessed to form a first frame groove (10). A first sealing ring (9) is installed in the first frame groove (10). The adjacent first sealing rings (9) are abutted against each other. A second frame groove is provided on the side of the positioning frame (3) facing the side frame (2). A second sealing ring (15) is installed in the second frame groove. One side of the second sealing ring (15) abuts against the inner side of the side frame (2).
3. The high-sealing modular steel fire door according to claim 1, characterized in that: Multiple first slots (11) are provided on one side of the plate (1). The adjacent plates (1) protrude to form first inserts (12) at the first slots (11). The first inserts (12) are inserted into the corresponding first slots (11). The first inserts (12) and the first inserts (12) are distributed laterally.
4. The high-sealing modular steel fire door according to claim 1, characterized in that: The topmost plate (1) and the remaining plates (1) each have multiple second slots (13) on one side. The bottommost plate (1) and the remaining plates (1) each have a protruding second insert plate (14) on one side. The second insert plates (14) are all inserted into the corresponding second slots (13). The second slots (13) and the second insert plates (14) are both longitudinally distributed.
5. The high-sealing modular steel fire door according to claim 1, characterized in that: The top and bottom horizontal plates are provided with first arc-shaped grooves at both ends, and the four corners inside the frame are provided with second arc-shaped grooves. The first arc-shaped grooves and the second arc-shaped grooves are combined to form an installation groove (4). The inner wall of the first arc-shaped groove is provided with a first connector, and the inner wall of the second arc-shaped groove is provided with a second connector. The first connector and the second connector are combined to form a stud (5). The stud (5) is threaded with a nut (6).
6. The high-sealing modular steel fire door according to claim 1, characterized in that: Both the sheet metal (1) and the positioning frame (3) are made of cold-rolled steel sheet.