A fire door structure

Abstract

The utility model discloses a fireproof door structure relates to building door and window technical field, it includes: main door body, including inner door board and outer door board, be equipped with the door core between inner door board and outer door board: at least two groups first edge covering subassembly, set up respectively in the upper end surface of main door body and the first side edge of main door body close to door frame, be equipped with first fireproof unit in first edge covering subassembly, second edge covering subassembly set up in the lower end surface of main door body, be equipped with second fireproof unit in second edge covering subassembly, third edge covering subassembly set up in the second side edge of main door body away from door frame, be equipped with third fireproof unit in third edge covering subassembly, first edge covering subassembly, second edge covering subassembly and third edge covering subassembly all are fixed in the outer side of main door body and form the edge covering, and the edge covering outer surface is flush with the door board outer surface. Through setting up first edge covering subassembly, second edge covering subassembly and third edge covering subassembly, fix the door board, thoroughly eliminate the hidden danger of decorative board and fall off with the lapse of time.

Description

Technical Field

[0001] This utility model relates to the field of building door and window technology, and in particular to a fire door structure. Background Technology

[0002] Existing steel-wood fireproof entrance doors mainly have two structural forms: The first is a structure without exposed edging, where the door panel is directly glued to the steel core. While this structure looks neat, it has significant drawbacks: over time, the glue ages easily, greatly increasing the risk of the panel falling off, making it difficult to guarantee the long-term reliability of the fireproof door. The second type uses an exposed edging structure, where the panel is mechanically fixed by edging strips around the perimeter. While this method solves the problem of falling off, the exposed edging detracts from the overall aesthetics of the door surface, significantly limiting door design and failing to meet the aesthetic demands of the high-end market. Therefore, there is a contradiction in existing technologies: pursuing aesthetics results in poor reliability, while ensuring reliability sacrifices aesthetics. Furthermore, both traditional structures typically handle fireproof sealing of door seams in a relatively simple way, making it difficult to achieve efficient multi-layered sealing. There is an urgent need for a new type of fireproof door structure that can simultaneously achieve aesthetics, structural reliability, and excellent fireproof sealing performance. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a fire door structure that not only achieves aesthetically pleasing edging and reliable fixation but also comprehensively enhances the overall performance of the fire door.

[0004] This utility model provides a fire door structure, including: a main door body hinged to a door frame, the main door body including an inner door panel and an outer door panel, a door core between the inner door panel and the outer door panel; at least two sets of first edge-sealing components, respectively disposed on the upper end face of the main door body and the first side of the main door body near the door frame; a first fireproof unit is disposed within the first edge-sealing component; a second edge-sealing component is disposed on the lower end face of the main door body; a second fireproof unit is disposed within the second edge-sealing component; a third edge-sealing component is disposed on the second side of the main door body away from the door frame; a third fireproof unit is disposed within the third edge-sealing component; wherein, on the first side and the upper end face of the main door body, the inner door panel is clearance-fitted with the door frame, and the outer door panel extends to the side of the door frame; the first edge-sealing component, the second edge-sealing component, and the third edge-sealing component are all fixed to the outside of the main door body to form an edge, and the outer surface of the edge is flush with the outer surface of the door panel.

[0005] As an improvement to the above solution, the first edge-binding assembly includes a first locking plate, which is fixed to the upper surface or first side of the main door body. The first locking plate includes: a first edge-binding body, which fits against the door core and is fixed by screws; a first inner locking protrusion, which is disposed at the first end of the first edge-binding body and is inserted into the slot of the inner door panel; and a first extension, the first end of which is connected to the second end of the first edge-binding body and extends to the outer door panel. The second end of the first extension body is provided with a first outer locking protrusion, which is connected to the slot on the outer door panel.

[0006] As an improvement to the above solution, the first fireproof unit includes: a first sealing groove, disposed on the door frame and located above or on the side of the inner door panel; the first sealing groove, the first card plate, and the inner door panel together form a sealed space, and a fireproof expansion seal is provided in the sealed space; and a first fireproof sealing strip, disposed between the first extension and the door frame.

[0007] As an improvement to the above solution, the lower ends of the inner door panel and the outer door panel are flush, and the lower ends of the inner door panel and the outer door panel are both longer than the door core. The second edge-wrapping assembly includes a second clip plate with second snap-fit ​​protrusions at both ends. The two second snap-fit ​​protrusions are respectively snapped into the slots on the lower end faces of the inner door panel and the outer door panel. The middle part of the second clip plate is recessed upward to form an installation groove.

[0008] As an improvement to the above solution, the second fireproof unit includes: two fireproof blocks, which are respectively set in the installation space enclosed by the second card plate, the inner door panel, the outer door panel and the door core, and the second card plate is connected to the fireproof blocks by screws; and an automatic dustproof rod, which is installed in the installation groove.

[0009] As an improvement to the above solution, the third edge-wrapping assembly includes a third retaining plate, which includes: a third edge-wrapping body, which fits against the door core and is fixed by screws, and the third edge-wrapping body is stepped; a third inner retaining protrusion, which is disposed at the first end of the third edge-wrapping assembly and is inserted into a slot on the side of the inner door panel; a second extension, the first end of which is connected to the second end of the third edge-wrapping body and extends to the outer door panel, the second end of which is provided with a third outer retaining protrusion, which is connected to a slot on the outer door panel; a third extension, which is connected to the second extension; and a second sealing groove that opens inward toward the door is formed between the second extension, the third extension, and the third edge-wrapping body.

[0010] As an improvement to the above solution, the third fireproof unit includes: a second fireproof sealing strip, which is disposed at the stepped folded edge of the third edging body; and a third fireproof sealing strip, which is disposed in the second sealing groove and sealed by a sealing plate.

[0011] As an improvement to the above solution, the fire door structure also includes a secondary door body, which is hinged to the door frame and forms a double door with the main door body; the upper end face and the third side near the door frame of the secondary door body are provided with the first edge-sealing component, the lower end face of the secondary door body is provided with the second edge-sealing component, and the fourth side of the secondary door body near the main door body is provided with the fourth edge-sealing component.

[0012] As an improvement to the above solution, the fireproof fourth edge-wrapping component includes: a fourth locking plate, the two ends of which are locked to the door panels on both sides of the sub-door body through a fourth locking protrusion; the middle part of the fourth locking plate is stepped and matches the outer contour of the third locking plate.

[0013] As an improvement to the above solution, both the outer door panel and the inner door panel include: galvanized sheet, the outer side of which is covered with flame-retardant MDF and decorative wood veneer; the outer side of the door core is covered with a galvanized sheet frame with a thickness of 1.0mm to 1.4mm.

[0014] The beneficial effects of implementing this utility model are as follows:

[0015] This utility model discloses a fire door structure that mechanically fixes the door panel by setting a first edge-sealing component, a second edge-sealing component, and a third edge-sealing component, completely eliminating the hidden danger of decorative panels falling off over time. By achieving a flush outer surface of the edge-sealing component with the outer surface of the door panel, the visual sense of discontinuity is eliminated, and an integrated aesthetic effect indistinguishable from a door without edge-sealing is achieved. By integrating fireproof units within each edge-sealing component, the fireproof sealing function is deeply integrated with the fixing and decorative functions of the edge-sealing, providing a basic framework for constructing a continuous multi-layer fireproof sealing system around the door body, and comprehensively improving the overall performance of the fire door. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a fire door structure according to an embodiment of this application;

[0017] Figure 2 This is a vertical structural cross-sectional view of a fire door structure according to an embodiment of this application;

[0018] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle;

[0019] Figure 4 This is a schematic diagram of the structure of the first card plate of a fire door structure according to an embodiment of this application;

[0020] Figure 5 This is an exploded view of the second edge-sealing component of a fire door structure according to an embodiment of this application;

[0021] Figure 6 yes Figure 1 Enlarged view of the structure at point B;

[0022] Figure 7 This is a schematic diagram of the third card plate of a fire door structure in an embodiment of this application.

[0023] The reference numerals in the attached drawings are explained as follows: 100, main door body; 110, inner door panel; 120, outer door panel; 200, first edge-sealing assembly; 210, first retaining plate; 211, first edge-sealing body; 212, first inner retaining protrusion; 213, first outer retaining protrusion; 214, first extension; 220, fireproof expansion seal; 230, first fireproof sealing strip; 300, second edge-sealing assembly; 310, second retaining plate; 311, mounting groove; 3 20. Fireproof block; 330. Automatic dustproof rod; 400. Third edge-sealing assembly; 410. Third retaining plate; 411. Third edge-sealing body; 412. Third inner retaining protrusion; 413. Third outer retaining protrusion; 414. Second extension; 415. Third extension; 420. Second fireproof sealing strip; 430. Third fireproof sealing strip; 500. Sub-door body; 600. Fourth edge-sealing assembly; 610. Fourth retaining plate; 700. Door frame. Detailed Implementation

[0024] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0025] See Figure 1 and Figure 2 , Figure 1 This is a cross-sectional view of a fire door structure according to an embodiment of this application; Figure 2This is a vertical structural cross-sectional view of a fire door structure according to an embodiment of this application; as shown in the figure, the fire door structure includes: a main door body 100, hinged to a door frame 700, the main door body 100 including an inner door panel 110 and an outer door panel 120, a door core being provided between the inner door panel 110 and the outer door panel 120; at least two sets of first edge-sealing components 200, respectively disposed on the upper end face of the main door body 100 and the first side of the main door body 100 near the door frame 700; a first fireproof unit is provided within the first edge-sealing component 200; a second edge-sealing component 300, disposed on the lower end face of the main door body 100; the... The second edge-sealing assembly 300 contains a second fireproof unit; the third edge-sealing assembly 400 is located on the second side of the main door body 100 away from the door frame 700; the third edge-sealing assembly 400 contains a third fireproof unit; wherein, on the first side and the upper surface of the main door body 100, the inner door panel 110 is clearance-fitted with the door frame 700, and the outer door panel 120 extends to the side of the door frame 700; the first edge-sealing assembly 200, the second edge-sealing assembly 300 and the third edge-sealing assembly 400 are all fixed to the outside of the main door body 100 to form an edge, and the outer surface of the edge is flush with the outer surface of the door panel. By mechanically fixing the door panel with the first edge-sealing component 200, the second edge-sealing component 300, and the third edge-sealing component 400, the hidden danger of the decorative panel falling off over time is completely eliminated. By making the outer surface of the edge-sealing flush with the outer surface of the door panel, the visual sense of separation is eliminated, and an integrated aesthetic effect indistinguishable from a door without edge-sealing is achieved. By integrating fireproof units into each edge-sealing component, the fireproof sealing function is deeply integrated with the fixing and decorative functions of the edge-sealing, providing a basic framework for building a continuous multi-layer fireproof sealing system around the door body, and comprehensively improving the overall performance of the fire door.

[0026] See Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a schematic diagram of the structure of the first card plate 210 of a fire door structure in an embodiment of this application.

[0027] Furthermore, in this embodiment, the first edge-binding assembly 200 includes a first locking plate 210, which is fixed to the upper surface or first side of the main door body 100. The first locking plate 210 includes: a first edge-binding body 211, which fits against the door core and is fixed by screws; a first inner locking protrusion 212, which is disposed at the first end of the first edge-binding body 211 and is inserted into the slot of the inner door panel 110; and a first extension 214, the first end of which is connected to the second end of the first edge-binding body 211 and extends to the outer door panel 120. The second end of the first extension body is provided with a first outer locking protrusion 213, which is connected to the slot on the outer door panel 120. The first inner snap-fit ​​protrusion 212 and the first outer snap-fit ​​protrusion 213 are respectively snapped into the slots of the inner and outer door panels 120, achieving a strong and precise clamping force on the inner and outer door panels 120. This prevents the door panels from falling off. The screw in the middle provides a strong main fixing force and forms a three-point force distribution structure with the snap-fit ​​protrusions at both ends, making the edge-wrapping components more evenly stressed and more firmly fixed. The impact resistance and deformation resistance are greatly enhanced, making it particularly suitable for entrance doors that are frequently opened and closed.

[0028] See Figure 3 Furthermore, in this embodiment, the first fireproof unit includes: a first sealing groove disposed on the door frame 700 and located above or on the side of the inner door panel 110; the first sealing groove, the first retaining plate 210, and the inner door panel 110 together form a sealed space, and a fire-resistant expansion seal 220 is provided in the sealed space; and a first fire-resistant sealing strip 230 disposed between the first extension 214 and the door frame 700. The first fire-resistant sealing strip 230 is used to provide a seal in a normally closed state, and the fire-resistant expansion seal 220 expands rapidly under the high temperature of a fire, filling the gaps that may be caused by thermal deformation, ensuring effective sealing of the door gaps throughout the entire fire process.

[0029] See Figure 2 and Figure 5 , Figure 5 This is an exploded view of the structure of the second edge-sealing component 300 of a fire door structure according to an embodiment of this application.

[0030] Furthermore, in this embodiment, the lower ends of the inner door panel 110 and the outer door panel 120 are flush, and the lower ends of both the inner door panel 110 and the outer door panel 120 are longer than the door core. The second edge-wrapping assembly 300 includes a second locking plate 310, which has second locking protrusions at both ends. The two second locking protrusions respectively lock into the slots on the lower end faces of the inner door panel 110 and the outer door panel 120. The middle of the second locking plate 310 is recessed upward to form an installation groove 311. The second locking plate 310 provides sufficient and concealed space for the installation of the second fireproof unit, so that the final finished surface can be flush with the side of the door panel, avoiding a large protrusion at the bottom of the door that would affect the aesthetics.

[0031] Furthermore, in this embodiment, the second fireproof unit includes: two fireproof blocks 320, respectively disposed within the installation space enclosed by the second retaining plate 310, the inner door panel 110, the outer door panel 120, and the door core; the second retaining plate 310 is connected to the fireproof blocks 320 by screws; and an automatic dustproof rod 330, installed in the mounting groove 311. The fireproof blocks 320 provide a solid base for the screw fixing of the second retaining plate 310, enhancing the structural strength. The fireproof blocks 320 themselves are made of non-combustible or flame-retardant materials, filling the cavity at the lower end of the door, compensating for the fire barrier that may be weakened by the installation of the automatic dustproof rod 330, and ensuring that the lower end of the door has the same fireproof integrity as the other sides; the automatic dustproof rod 330 automatically presses down when the door is closed, ensuring the airtightness and dustproof function of the door.

[0032] See Figure 1 , Figure 6 and Figure 7 , Figure 6 yes Figure 1 Enlarged view of the structure at point B; Figure 7 This is a schematic diagram of the structure of the third card plate 410 of a fire door structure in an embodiment of this application.

[0033] Furthermore, in this embodiment, the third edge-wrapping assembly 400 includes a third retaining plate 410, which includes: a third edge-wrapping body 411, which fits against the door core and is fixed by screws, and the third edge-wrapping body 411 is stepped; a third inner retaining protrusion 412, which is disposed at the first end of the third edge-wrapping assembly 400 and is inserted into the slot on the side of the inner door panel 110; a second extension 414, the first end of which is connected to the second end of the third edge-wrapping body 411 and extends to the outer door panel 120, the second end of which is provided with a third outer retaining protrusion 413, which is connected to the slot on the outer door panel 120; a third extension 415, which is connected to the second extension 414; and a second sealing groove that opens inward to the door is formed between the second extension 414, the third extension 415 and the third edge-wrapping body 411. The third edging body 411 is stepped and fixed with screws, which greatly enhances the mechanical strength of the third edging assembly 400 in terms of bending and impact resistance, making the door edge more robust and durable.

[0034] See Figure 6 Furthermore, in this embodiment, the third fireproof unit includes: a second fireproof sealing strip 420, disposed at the stepped fold of the third edging body 411; and a third fireproof sealing strip 430, disposed within the second sealing groove and sealed by a sealing plate. The second sealing groove, opening inwards, forces the third fireproof sealing strip 430 to press more tightly against the sealing surface due to internal pressure, thereby forming a "pressure-activated" enhanced sealing effect, which is not present in traditional outward-opening sealing grooves, resulting in superior smoke and fire protection performance.

[0035] See Figure 1 Furthermore, in this embodiment, the fire door structure also includes a secondary door body 500, which is hinged to the door frame 700 and forms a double door with the main door body 100; the upper end surface of the secondary door body 500 and the third side near the door frame 700 are provided with the first edge-sealing component 200, the lower end surface of the secondary door body 500 is provided with the second edge-sealing component 300, and the fourth side of the secondary door body 500 near the main door body 100 is provided with the fourth edge-sealing component 600.

[0036] See Figure 6 Furthermore, in this embodiment, the fireproof fourth edge-wrapping component 600 includes: a fourth locking plate 610, the two ends of which are locked to the door panels on both sides of the sub-door body 500 through a fourth locking protrusion; the middle part of the fourth locking plate 610 is stepped and matches the outer contour of the third locking plate 410.

[0037] Furthermore, in this embodiment, both the outer door panel 120 and the inner door panel 110 include: galvanized sheet, the outer side of which is covered with flame-retardant MDF and decorative wood veneer; the outer side of the door core is covered with a galvanized sheet frame with a thickness of 1.0mm to 1.4mm.

[0038] Furthermore, the thickness of the galvanized sheet is 0.8mm to 1.2mm, preferably 1.0mm; the thickness of the flame-retardant MDF is 8mm to 12mm, preferably 9mm; the thickness of the decorative wood veneer is 0.4mm to 0.8mm, preferably 0.6mm, and the estimated thickness of the galvanized sheet is preferably 1.0mm.

[0039] Preferably, the decorative wood veneer is a straight-grained white brushed wood veneer.

[0040] As can be seen from the above, the fire door structure of this utility model, by setting a first edge-sealing component, a second edge-sealing component, and a third edge-sealing component to mechanically fix the door panel, completely eliminates the hidden danger of decorative panels falling off over time, greatly improving reliability. By achieving a flush outer surface of the edge-sealing component with the outer surface of the door panel, the visual sense of separation is eliminated, and an integrated aesthetic effect indistinguishable from a door without edge-sealing is obtained. By integrating fireproof units in each edge-sealing component, the fireproof sealing function is deeply integrated with the fixing and decorative functions of the edge-sealing, providing a basic framework for constructing a continuous multi-layer fireproof sealing system around the door body, and comprehensively improving the overall performance of the fire door.

[0041] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A fire door structure, characterized in that, include: The main door body, hinged to the door frame, includes an inner door panel and an outer door panel, with a door core located between the inner and outer door panels. At least two sets of first edge-sealing components are respectively disposed on the upper end face of the main door body and the first side of the main door body near the door frame; the first edge-sealing component is provided with a first fireproof unit. A second edge-sealing assembly is disposed on the lower end face of the main door body; a second fireproof unit is provided inside the second edge-sealing assembly. The third edge-sealing assembly is located on the second side of the main door body away from the door frame; the third edge-sealing assembly is provided with a third fireproof unit; Wherein, on the first side and the upper surface of the main door body, the inner door panel is fitted with the door frame with a gap, and the outer door panel extends to the side of the door frame; the first edge-sealing assembly, the second edge-sealing assembly and the third edge-sealing assembly are all fixed to the outside of the main door body to form an edge, and the outer surface of the edge-sealing is flush with the outer surface of the door panel.

2. The fire door structure according to claim 1, characterized in that: The first edge-sealing assembly includes a first retaining plate, which is fixed to the upper end face or first side of the main door body. The first retaining plate includes: The first edging body is fitted to the door core and fixed with screws; The first inner snap-fit ​​protrusion is located at the first end of the first edge-binding body, and the first inner snap-fit ​​protrusion is inserted into the snap-fit ​​opening of the inner door panel. The first extension has a first end connected to the second end of the first edging body, and the first extension extends to the outer door panel. The second end of the first extension body is provided with a first external snap-fit ​​protrusion, and the first external snap-fit ​​protrusion is connected to the snap-fit ​​on the outer door panel.

3. The fire door structure according to claim 2, characterized in that: The first fire protection unit includes: The first sealing groove is disposed on the door frame and located above or on the side of the inner door panel; the first sealing groove, the first retaining plate, and the inner door panel together form a sealing space, and a fireproof expansion seal is provided in the sealing space; A first fireproof sealing strip is disposed between the first extension and the door frame.

4. The fire door structure according to claim 1, characterized in that: The lower ends of the inner door panel and the outer door panel are flush, and the lower ends of the inner door panel and the outer door panel are both longer than the door core. The second edge-wrapping assembly includes a second clip plate with second snap-fit ​​protrusions at both ends. The two second snap-fit ​​protrusions are respectively snapped into the slots on the lower end faces of the inner door panel and the outer door panel. The middle part of the second clip plate is recessed upward to form an installation groove.

5. The fire door structure according to claim 4, characterized in that, The second fire protection unit includes: Two fireproof blocks are respectively installed in the installation space enclosed by the second card plate, the inner door panel, the outer door panel and the door core. The second card plate is connected to the fireproof blocks by screws. An automatic dustproof rod is installed in the mounting slot.

6. The fire door structure according to claim 1, characterized in that: The third edge-binding component includes a third retaining plate, the third retaining plate comprising: The third edging body is attached to the door core and fixed with screws; the third edging body is stepped. The third inner snap-fit ​​protrusion is provided at the first end of the third edge-wrapping assembly, and the third inner snap-fit ​​protrusion is inserted into the snap-fit ​​opening on the side of the inner door panel; The second extension has a first end connected to the second end of the third edging body. The second extension extends to the outer door panel. The second end of the second extension is provided with a third external snap-fit ​​protrusion, which is connected to the snap-fit ​​on the outer door panel. The third extension is connected to the second extension; a second sealing groove that opens into the door is formed between the second extension, the third extension and the third edging body.

7. The fire door structure according to claim 6, characterized in that: The third fire protection unit includes: The second fireproof sealing strip is installed at the stepped folded edge of the third edging body; The third fireproof sealing strip is installed in the second sealing groove and sealed by the sealing plate.

8. The fire door structure according to claim 6, characterized in that: The fire door structure also includes a secondary door body, which is hinged to the door frame and forms a double door with the main door body; The upper end face of the secondary door and the third side near the door frame are provided with the first edge-sealing component, the lower end face of the secondary door is provided with the second edge-sealing component, and the fourth side of the secondary door near the main door is provided with the fourth edge-sealing component.

9. The fire door structure according to claim 6, characterized in that: The fire-resistant fourth edge-sealing component includes: The fourth card plate has its two ends connected to the door panels on both sides of the sub-door body via fourth snap-fit ​​protrusions; the middle part of the fourth card plate is stepped and matches the outer contour of the third card plate.

10. The fire door structure according to claim 1, characterized in that: Both the outer door panel and the inner door panel include: galvanized sheet, with flame-retardant MDF and decorative wood veneer pasted on the outer side of the galvanized sheet; The outer side of the door core is covered with a galvanized steel frame with a thickness of 1.0mm to 1.4mm.

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