Impact resistant fire door

Abstract

The utility model relates to fireproof door technical field, specifically disclose a kind of impact-resistant fireproof door, including door frame, hinged setting on the door leaf of door frame, U-shaped protective plate is fixedly connected to the door leaf outside, the inside of protective plate is equipped with firm mechanism;The firm mechanism includes rotating shaft, the rotating shaft is rotatably connected with door leaf, the outer wall of rotating shaft is fixedly connected with gear, the outer wall of gear is engagedly connected with the rack distributed left and right, one end of rack is fixedly connected with wedge, the outer wall of door frame is fixedly connected with the plug-in box compatible with wedge, plug-in box is open to wedge side as a side, the inside of door leaf is five-layer composite structure, the device is prevented by mechanical locking that door is forced to break open or pry open, composite structure protects door body structure integrity when bearing impact and fire, prevents flame and smoke penetration.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, and specifically discloses an impact-resistant fire door. Background Technology

[0002] 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 have the function of preventing the spread of fire and smoke, and can prevent the spread of fire for a certain period of time to ensure the evacuation of personnel.

[0003] Existing fire doors use single-layer steel plates and fire-resistant fillers, or increase the thickness of the fire-resistant fillers to improve fire resistance, resulting in excessive door weight. Under the action of an explosive shock wave, hinges are prone to breakage and failure. Although some fire doors use externally reinforced steel frames, this damages the fire-resistant sealing layer and generates a thermal bridge effect at high temperatures, which, according to actual measurements, leads to a decrease in fire resistance time. At the same time, traditional single-point bolt locks cause plastic deformation of the door frame around the bolt hole when subjected to large lateral impact forces, which cannot meet the protection requirements of high-risk locations. Therefore, improvements are needed. Utility Model Content

[0004] This utility model proposes an impact-resistant fire door. The device achieves impact resistance and excellent fire resistance performance far exceeding that of ordinary fire doors through the synergistic effect of a unique mechanical locking and stabilizing mechanism (active impact resistance) and a multi-layer composite structure (passive impact resistance and fire resistance). The mechanical locking prevents the door from being forcibly forced open or pried open, while the composite structure protects the integrity of the door structure when subjected to impact and fire, preventing flames and smoke from penetrating.

[0005] This utility model is implemented as follows: an impact-resistant fire door includes a door frame and a door leaf hinged to the door frame. A U-shaped protective plate is fixed to the outside of the door leaf, and a stabilizing mechanism is provided inside the protective plate.

[0006] The stabilizing mechanism includes a rotating shaft, which is rotatably connected to the door leaf. A gear is fixedly connected to the outer wall of the rotating shaft, and a rack distributed on the left and right is meshed with the outer wall of the gear. A wedge block is fixedly connected to one end of the rack, and an insert box adapted to the wedge block is fixedly connected to the outer wall of the door frame. The insert box is open on the side facing the wedge block.

[0007] The door panel has a five-layer composite structure, which includes, from the outside to the inside, an outer shell, a corrugated steel plate impact-resistant layer, a honeycomb aluminum rubber buffer layer, a vermiculite fireproof layer, a steel frame layer, and an inner protective steel plate layer.

[0008] As a preferred embodiment of the impact-resistant fire door of this utility model, the inner wall of the protective plate is fixedly installed with two T-shaped sliding grooves distributed on the left and right, and the inner wall of the sliding groove is slidably connected with a matching slider, and the slider is fixedly connected with a corresponding rack.

[0009] As a preferred embodiment of the impact-resistant fire door of this utility model, the top and bottom of the protective plate are respectively provided with through holes, the positions of the through holes are corresponding to the insertion box, so that the wedge block passes through and is inserted into the insertion box.

[0010] As a preferred embodiment of the impact-resistant fire door of this utility model, the inner wall of the insertion box is fixedly covered with a basalt fiber rubber pad, the thickness of which is 5-8mm.

[0011] As a preferred embodiment of the impact-resistant fire door of this utility model, one end of the rotating shaft passes through the protective plate and is fixedly installed with a handwheel, and the interlayer of the protective plate is filled with ceramic fiber felt.

[0012] As a preferred embodiment of the impact-resistant fire door of this utility model, the honeycomb aluminum rubber buffer layer is composed of a honeycomb aluminum alloy skeleton and silicone rubber injected into the skeleton.

[0013] As a preferred embodiment of the impact-resistant fire door of this utility model, the surface of the outer shell is coated with a fire-retardant coating.

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

[0015] The rotation of the gears in the stabilizing mechanism drives the movement of two racks, causing two wedge blocks to insert into the corresponding boxes fixed on the door frame 1. The T-shaped slide and the slider ensure that the racks move in a straight line without deviation, preventing the mechanism from jamming. This achieves rigid locking of the door leaf and the door frame, forming a strong impact-resistant frame and effectively improving the impact resistance of the fire door.

[0016] The outer shell and fire-retardant coating provide basic protection, the corrugated steel plate impact-resistant layer provides impact resistance, the honeycomb aluminum rubber buffer layer provides efficient energy absorption and cushioning, the vermiculite fireproof layer provides fire protection and heat insulation, the steel frame layer and inner protective steel plate layer provide core support and inner protection, and the ceramic fiber felt of the protective plate further enhances edge fire resistance. The synergistic effect of passive impact resistance and fire resistance can protect the integrity of the door structure and prevent flames and smoke from penetrating in the event of a fire. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is an overall structural diagram of an impact-resistant fire door according to this utility model.

[0019] Figure 2 This is a cross-sectional view of the stabilizing mechanism of this utility model.

[0020] Figure 3 This is a side sectional view of the door leaf of this utility model.

[0021] Figure 4 This is a structural diagram of the slide groove and slider of this utility model.

[0022] The markings in the diagram are as follows: 1. Door frame; 101. Door leaf; 102. Outer shell; 2. Protective plate; 201. Ceramic fiber felt; 202. Through hole; 3. Rotating shaft; 301. Gear; 302. Handwheel; 4. Rack; 401. Wedge block; 402. Slide groove; 403. Slider; 5. Insert box; 501. Basalt fiber rubber pad; 6. Corrugated steel plate impact-resistant layer; 601. Honeycomb aluminum rubber buffer layer; 7. Vermiculite fireproof layer; 8. Steel frame layer; 9. Inner protective steel plate layer. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0024] Please see Figure 1-4 An impact-resistant fire door includes a door frame 1 and a door leaf 101 hinged to the door frame 1. A U-shaped protective plate 2 is fixed to the outside of the door leaf 101, and a stabilizing mechanism is provided inside the protective plate 2.

[0025] The stabilizing mechanism includes a rotating shaft 3, which is rotatably connected to the door leaf 101. A gear 301 is fixedly connected to the outer wall of the rotating shaft 3. A rack 4 distributed on the left and right is meshed with the outer wall of the gear 301. A wedge block 401 is fixedly connected to one end of the rack 4. An insert box 5 adapted to the wedge block 401 is fixedly connected to the outer wall of the door frame 1. The side of the insert box 5 facing the wedge block 401 is open.

[0026] The interior of the door leaf 101 has a five-layer composite structure, which includes, from the outside to the inside, an outer shell 102, a corrugated steel plate impact-resistant layer 6, a honeycomb aluminum rubber buffer layer 601, a vermiculite fireproof layer 7, a steel frame layer 8, and an inner protective steel plate layer 9.

[0027] In this embodiment: when the fire door is closed, the handwheel 302 drives the gear 301, which in turn drives the two racks 4 to move. This pushes the two wedge blocks 401 out of the top and bottom through holes 202 of the U-shaped protective plate 2 and forcefully inserts them into the corresponding insert boxes 5 fixed on the door frame 1. The T-shaped slide 402 and the slider 403 ensure that the rack 4 moves linearly without deviation, preventing the mechanism from jamming. This achieves rigid locking of the door leaf 101 and the door frame 1, forming a strong impact-resistant frame and effectively improving the impact resistance of the fire door.

[0028] Meanwhile, the door leaf 101 adopts a five-layer composite structure: the outer shell 102 and fireproof coating provide basic protection, the corrugated steel plate impact-resistant layer 6 provides impact resistance, the honeycomb aluminum rubber buffer layer 601 provides high-efficiency energy absorption and buffering, the vermiculite fireproof layer 7 provides fireproof and heat insulation, the steel frame layer 8 and the inner protective steel plate layer 9 provide core support and inner protection, and the ceramic fiber felt 201 of the protective plate 2 further strengthens the edge fireproofing. The synergistic effect of passive impact resistance and fireproofing protects the integrity of the door structure and prevents flames and smoke from penetrating in the event of a fire.

[0029] As a technical optimization of this utility model, the inner wall of the protective plate 2 is fixedly installed with two T-shaped sliding grooves 402 distributed on the left and right. The inner wall of the sliding groove 402 is slidably connected with a matching slider 403, and the slider 403 is fixedly connected with the corresponding rack 4.

[0030] In this embodiment: the rack 4 slides in the T-shaped groove 402 via the fixed slider 403. The T-shaped design provides bidirectional limiting to ensure that the rack 4 moves accurately along a straight line and avoids misalignment between the gear 301 and the rack 4. When the wedge block 401 is inserted into the insert box 5 and subjected to impact force, the T-shaped groove can resist the up-and-down warping or twisting of the rack 4, prevent the mechanism from jamming or failing, and improve the impact resistance stability.

[0031] As a technical optimization of this utility model, through holes 202 are respectively opened at the top and bottom of the protective plate 2, and the positions of the through holes 202 correspond to the insertion box 5, so that the wedge block 401 passes through and is inserted into the insertion box 5.

[0032] In this embodiment: the through holes 202 at the top / bottom of the protective plate 2 provide a directional channel for the wedge block 401: the position of the through holes 202 is strictly aligned with the insertion box 5 on the door frame 1 to ensure that the wedge block 401 can be inserted into the insertion box 5 in a straight line without obstruction; the inner wall of the through holes 202 constrains the movement trajectory of the wedge block 401 to avoid deflection and ensure the accuracy and reliability of the locking action.

[0033] As a technical optimization of this utility model, a basalt fiber rubber pad 501 is fixedly laid on the inner wall of the insert box 5, and the thickness of the rubber pad is 5-8mm.

[0034] In this embodiment: the basalt fiber rubber pad 501 on the inner wall of the insert box 5 has a dual function:

[0035] Buffering and energy absorption: When the wedge block 401 is inserted, the rubber pad (5-8mm thick) absorbs the impact kinetic energy through elastic deformation, reducing mechanical vibration and noise;

[0036] Friction Enhancement and Fire Resistance: Basalt fiber is resistant to high temperatures (>1000℃). When combined with rubber, it not only enhances locking friction (prevents loosening) but also maintains integrity in a fire, improving locking reliability in high-temperature environments.

[0037] As a technical optimization of this utility model, one end of the rotating shaft 3 passes through the protective plate 2 and is fixedly installed with a handwheel 302, and the interlayer of the protective plate 2 is filled with ceramic fiber felt 201.

[0038] In this embodiment: the rotating shaft 3 extends to the outside of the protective plate 2 and fixes the handwheel 302, providing a manual operation interface. Rotating the handwheel 302 directly drives the gear 301, realizing convenient control of locking / unlocking.

[0039] Ceramic fiber felt 201 is filled in the interlayer of protective plate 2. Utilizing its low thermal conductivity, it isolates heat from being transferred to the internal structure during a fire, protecting metal components such as gear 301 and rack 4 from high-temperature deformation and failure.

[0040] As a technical optimization of this utility model, the honeycomb aluminum rubber buffer layer 601 is composed of a honeycomb aluminum alloy skeleton and silicone rubber injected into the skeleton.

[0041] In this embodiment: the honeycomb aluminum rubber buffer layer 601 is composed of a honeycomb aluminum alloy skeleton injected with silicone rubber.

[0042] The honeycomb aluminum skeleton provides high-strength support and disperses impact stress through the honeycomb structure;

[0043] When silicone rubber fillers are subjected to impact, they undergo viscoelastic deformation, converting kinetic energy into heat energy and dissipating it.

[0044] The honeycomb structure restricts rubber flow, extends the energy absorption path, and significantly improves interlayer penetration resistance and multiple impact resistance.

[0045] As a technical optimization of this utility model, the surface of the outer shell 102 is coated with a fire-retardant coating.

[0046] In this embodiment, the fire-retardant coating (such as an intumescent coating) applied to the surface of the outer shell 102 undergoes the following reactions at high temperatures: the coating melts to form a dense glaze layer, which prevents oxygen from directly contacting the metal outer shell with the flame; it decomposes upon heating to release inert gas, which dilutes the concentration of combustible gas; the coating expands and foams (expansion rate > 10 times), forming a porous carbonized layer that reflects heat and reduces the rate of heat conduction to the inner layers (such as the corrugated steel plate layer), thus extending the fire resistance limit of the door.

[0047] The working principle and usage process of this utility model are as follows: When the fire door is closed, the operating handwheel 302 drives the gear 301, which in turn drives the two racks 4 to move, pushing the two left and right wedge blocks 401 out of the top and bottom through holes 202 of the U-shaped protective plate 2, and forcefully inserting them into the corresponding insert boxes 5 fixed on the door frame 1. The basalt fiber rubber pad 501 inside the insert box 5 provides cushioning and friction locking. This process rigidly locks the door leaf 101 to the door frame 1 through the sturdy U-shaped protective plate 2, forming a strong impact-resistant frame and effectively improving the impact resistance of the fire door.

[0048] Meanwhile, the door leaf 101 adopts a five-layer composite structure: the outer shell 102 and fireproof coating provide basic protection, the corrugated steel plate impact-resistant layer 6 provides impact resistance, the honeycomb aluminum rubber buffer layer 601 provides high-efficiency energy absorption and buffering, the vermiculite fireproof layer 7 provides fireproof and heat insulation, the steel frame layer 8 and the inner protective steel plate layer 9 provide core support and inner protection, and the ceramic fiber felt 201 of the protective plate 2 further strengthens the edge fireproofing. The synergistic effect of passive impact resistance and fireproofing protects the integrity of the door structure and prevents flames and smoke from penetrating in the event of a fire.

[0049] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. An impact-resistant fire door, comprising a door frame (1) and a door leaf (101) hinged to the door frame (1), characterized in that: A U-shaped protective plate (2) is fixedly connected to the outside of the door leaf (101), and a stabilizing mechanism is provided inside the protective plate (2); The stabilizing mechanism includes a rotating shaft (3), which is rotatably connected to the door leaf (101). A gear (301) is fixedly connected to the outer wall of the rotating shaft (3). A rack (4) distributed on the left and right is meshed with the outer wall of the gear (301). A wedge block (401) is fixedly connected to one end of the rack (4). A plug box (5) adapted to the wedge block (401) is fixedly connected to the outer wall of the door frame (1). The plug box (5) is open on the side facing the wedge block (401). The door leaf (101) has a five-layer composite structure inside, which includes an outer shell (102), a corrugated steel plate impact-resistant layer (6), a honeycomb aluminum rubber buffer layer (601), a vermiculite fireproof layer (7), a steel frame layer (8), and an inner protective steel plate layer (9) arranged sequentially from the outside to the inside.

2. The impact-resistant fire door according to claim 1, characterized in that: The inner wall of the protective plate (2) is fixedly installed with two T-shaped sliding grooves distributed on the left and right. The inner wall of the sliding groove (402) is slidably connected with a matching slider (403), and the slider (403) is fixedly connected with the corresponding rack (4).

3. The impact-resistant fire door according to claim 1, characterized in that: The protective plate (2) has through holes (202) at the top and bottom respectively. The position of the through holes (202) corresponds to the insertion box (5) so that the wedge block (401) passes through and is inserted into the insertion box (5).

4. The impact-resistant fire door according to claim 1, characterized in that: The inner wall of the insert box (5) is fixedly laid with a basalt fiber rubber pad (501), and the thickness of the rubber pad is 5-8mm.

5. The impact-resistant fire door according to claim 1, characterized in that: One end of the rotating shaft (3) passes through the protective plate (2) and is fixedly installed with a handwheel (302). The interlayer of the protective plate (2) is filled with ceramic fiber felt (201).

6. The impact-resistant fire door according to claim 1, characterized in that: The honeycomb aluminum rubber buffer layer (601) is composed of a honeycomb aluminum alloy skeleton and silicone rubber injected into the skeleton.

7. The impact-resistant fire door according to claim 1, characterized in that: The surface of the outer casing (102) is coated with a fire-retardant coating.

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