A two-way escape interval fire door

Abstract

The utility model relates to a kind of two-way escape interval fire door, including door frame, the door frame is fixed in building area doorway by expansion screw, two door leaves are rotatably installed in same door frame, the overall structure rigidity is enhanced by reinforcing part in door frame, avoid the deformation or jam when door leaf bidirectional rotation occurs. When personnel exerts push force from door two sides, door leaf can rotate around rotating shaft flexibly, break through the restriction of traditional one-way opening, realize bidirectional smooth opening and closing, ensure that both sides personnel can pass through quickly in emergency, guarantee real-time unobstructed of escape route, the sealing strip of door leaf edge is embedded in the fireproof sealing groove of door frame, first sealing barrier is formed by closely fitting, block the penetration of smoke in daily environment, when fire occurs, along with temperature rises, fireproof expansion adhesive strip in the recess of door frame and door leaf rotating joint rapidly expands, fills gap and extrudes sealing strip, forms second reinforced sealing layer.

Description

Technical Field

[0001] This utility model relates to the field of building fire protection facilities technology, specifically a two-way escape fire door. Background Technology

[0002] Fire doors are crucial for ensuring the safe evacuation of personnel and preventing the spread of fire. Their performance is of paramount importance, but traditional fire doors have revealed many limitations in practical applications.

[0003] From the perspective of escape convenience, most traditional fire doors can only be opened in one direction. In places with dense crowds and complex evacuation routes, such as tunnels, underground passages, and building floors, if the evacuation direction is blocked in the event of a fire, trapped people will find it difficult to quickly find an effective escape exit in an emergency. The fire door then becomes a barrier to escape, greatly increasing the risk of casualties.

[0004] Regarding fire-resistant sealing performance, existing fire doors have deficiencies in their sealing structures. Under normal conditions, some fire doors rely solely on simple rubber sealing strips for sealing, which is insufficient to effectively prevent smoke penetration. During a fire, as temperatures rise rapidly, ordinary sealing strips soften, deform, or even burn, failing to maintain a proper seal and allowing fire and smoke to spread rapidly through the door gaps to adjacent areas. Furthermore, in special scenarios, such as fire doors in tunnels, the confined space, poor air circulation, high temperatures, high pressures, and toxic fumes generated by fire place even higher demands on fire door performance. Traditional fire doors struggle to meet the comprehensive requirements of two-way escape, fire-resistant sealing, and structural stability in these complex environments. Therefore, we need to provide a two-way escape zone fire door. Utility Model Content

[0005] The purpose of this utility model is to provide a fire door for bidirectional escape. The bidirectional escape mechanism is based on a common frame structure with internal reinforcement components, which not only ensures smooth opening of the door in both directions but also improves structural stability. In an emergency, people can quickly open the door from both sides, avoiding the escape dilemma when the evacuation direction is blocked by a one-way opening door, greatly shortening evacuation time, and giving people more opportunities to escape, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fireproof partition door with bidirectional escape capability, comprising:

[0007] A door frame is fixed to the doorway of the building area by expansion bolts. The door frame has two door leaves, which are rotatably installed inside the door frame. A reinforcing member is fixedly installed inside the door frame, and a fireproof sealing component is provided on the surface of the door frame.

[0008] The fireproof sealing assembly includes an installation groove, a guide groove, a fireproof strip, and a guide strip. The installation groove is located at the top, bottom, and one side of the door frame. The guide groove is located within the installation groove. The fireproof strip is slidably installed within the installation groove. The surface of the fireproof strip is provided with a guide strip that matches the guide groove.

[0009] Preferably, it also includes a replacement part for easy replacement of the fireproof strip. The replacement part includes a mounting bracket, a strip groove, and a fixing part. There are two mounting brackets, located at the top and bottom of the movable end of the door frame, respectively, for preventing the fireproof strip from falling off. The mounting bracket has a strip groove on its surface. The fixing part works with the strip groove to fix the mounting bracket to the door leaf surface.

[0010] Preferably, the fastener includes a first rod, a second rod, and a nut. The first rod is fixed to the surface of the mounting bracket, and the second rod is fixed to the surface of the door leaf. The strip groove is inserted into the surface of the second rod so that the first rod and the second rod fit together. The nut is threaded onto the surfaces of the first rod and the second rod for mounting the bracket.

[0011] Preferably, the reinforcing member includes a reinforcing keel, a supporting steel, and a fireproof sealing strip. The reinforcing keel is fixed inside the door frame and located between two door leaves. The supporting steel is installed inside the reinforcing keel and fixed inside the door opening. A fireproof sealing strip is installed on the surface of the reinforcing keel on one side of the door leaf.

[0012] Preferably, the gap between the door frame and the wall is filled with fireproof sealant.

[0013] Preferably, a fire-resistant expansion strip is provided in the groove at the rotating connection between the door frame and the door leaf.

[0014] Preferably, the door leaf includes an outer diamond plate, an inner high-temperature resistant fireproof steel plate, and a fireproof layer, wherein the fireproof layer is installed between the outer diamond plate and the inner high-temperature resistant fireproof steel plate.

[0015] Preferably, the fireproof layer is one of rock wool or aluminum silicate fiber heat insulation and fireproof material.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model's two-way escape mechanism is based on a shared frame structure with internal reinforcement components. This ensures smooth two-way opening of the door and enhances structural stability. In emergencies, personnel can quickly open the door from both sides, avoiding the escape difficulties that arise when evacuation is obstructed by a one-way door. This significantly shortens evacuation time and provides more opportunities for escape. The sealing strip maintains a normal sealing structure, effectively preventing smoke penetration during daily use. In case of fire, the automatically expanding fire-resistant rubber strip further fills gaps and maintains good sealing performance even in high-temperature environments. This ensures effective prevention of smoke and fire spread in both normal and fire conditions, fully meeting fire safety regulations for fire prevention and smoke isolation, and improving the overall level of safety protection. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a partial three-dimensional structural view of the present invention;

[0020] Figure 3 This is a top view of the reinforcing member of this utility model;

[0021] Figure 4 This is a perspective view of the reinforcing component of this utility model;

[0022] Figure 5 This is a three-dimensional sectional view of the door leaf of this utility model;

[0023] Figure 6 This is an exploded perspective view of the fastener and fireproof sealing assembly of this utility model.

[0024] In the diagram: 1. Door frame; 2. Door leaf; 21. Outer steel plate; 22. Inner high-temperature fireproof steel plate; 23. Fireproof layer; 3. Reinforcing component; 31. Reinforcing keel; 32. Supporting steel; 33. Fireproof sealing strip; 4. Fireproof sealing assembly; 41. Mounting groove; 42. Guide groove; 43. Fireproof strip; 44. Guide strip; 5. Replacement part; 51. Mounting corner bracket; 52. Strip groove; 53. Fixing component; 531. First rod; 532. Second rod; 533. Nut; 6. Fireproof sealant; 7. Fireproof expansion strip. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-6 This utility model provides a technical solution: a fireproof partition door with bidirectional escape capability, comprising:

[0027] Door frame 1 is fixed to the door opening of the building area by expansion bolts. Two door leaves 2 are provided inside the door frame 1. The door leaves 2 are rotatably installed inside the door frame 1. A reinforcing member 3 is fixedly installed inside the door frame 1. A fireproof sealing component 4 is provided on the surface of the door frame 1.

[0028] The fireproof sealing assembly 4 includes a mounting groove 41, a guide groove 42, a fireproof strip 43, and a guide strip 44. The mounting groove 41 is provided on the top, bottom, and one side of the door frame 1. The guide groove 42 is provided in the mounting groove 41. The fireproof strip 43 is slidably installed in the mounting groove 41. The surface of the fireproof strip 43 is provided with a guide strip 44 that is compatible with the guide groove 42.

[0029] Specifically, the two-way escape mechanism is based on a shared frame structure with internal reinforcement components. This ensures smooth opening of door 2 in both directions and improves structural stability. In an emergency, people can quickly open the door from both sides, avoiding the escape difficulties that occur when the evacuation direction is blocked by a one-way door. This significantly shortens evacuation time and provides more opportunities for people to escape. The sealing strip has a normal sealing structure that can effectively block smoke penetration during daily use. The fireproof expansion strip 7, which automatically expands during a fire, can further fill gaps and maintain good sealing performance even in high-temperature environments. This ensures that it can effectively block the spread of smoke and fire in both normal and fire conditions, fully meeting the fire protection requirements for fire prevention and smoke isolation, and improving the overall level of safety protection.

[0030] It also includes a replacement part 5 for easy replacement of the fireproof strip 43. The replacement part 5 includes a mounting corner bracket 51, a strip groove 52 and a fixing part 53. There are two mounting corner brackets 51, located at the top and bottom of the movable end of the door frame 1, respectively, to protect the fireproof strip 43 from falling off. The mounting corner bracket 51 has a strip groove 52 on its surface. The fixing part 53 works in conjunction with the strip groove 52 to fix the mounting corner bracket 51 to the surface of the door leaf 2.

[0031] Furthermore, the mounting bracket 51 is made of cold-rolled steel plate with a thickness of 3-5mm, bent into shape. A 0.5mm thick heat-resistant rubber pad is pasted on the inner side where it fits against the edge of the fireproof strip 43 to prevent the fireproof strip 43 from directly rubbing against the metal and causing wear. The groove width of the strip groove 52 is 0.5-1mm larger than the diameter of the second rod 532, and the groove depth is 2 / 3 of the length of the second rod 532. This ensures that the second rod 532 can be inserted smoothly and restricts the lateral displacement of the mounting bracket 51. After the mounting bracket 51 is fixed, the gap between it and the surface of the door leaf 2 does not exceed 1mm, which can prevent dust from entering and affecting the sliding of the fireproof strip 43. This replacement part 5, through its detachable structure, solves the problem that the replacement of the traditional fireproof strip 43 requires the entire door leaf 2 to be disassembled, shortening the replacement time. Moreover, the rubber pad improves the service life of the fireproof strip 43.

[0032] The fastener 53 includes a first rod 531, a second rod 532, and a nut 533. The first rod 531 is fixed to the surface of the mounting bracket 51, and the second rod 532 is fixed to the surface of the door leaf 2. The strip groove 52 is inserted into the surface of the second rod 532 so that the first rod 531 and the second rod 532 fit together. The nut 533 is threaded onto the surfaces of the first rod 531 and the second rod 532 for fixing the mounting bracket 51.

[0033] It is worth noting that both the first rod 531 and the second rod 532 are made of 45# steel with a diameter of 8-10mm, and both have M8-M10 external threads on their surfaces. Their mating surfaces are mutually matching planes, forming a complete cylindrical thread structure after mating. The nut 533 is a hexagonal flange nut, with a spring washer between its flange face and the mounting bracket 51 to prevent the nut 533 from loosening when the door leaf 2 vibrates. This structure, through the mating of the two rods to form a complete threaded fit, solves the problem of uneven force distribution when a single rod is fixed, ensuring that the mounting bracket 51 does not fall off under strong wind pressure.

[0034] The reinforcing component 3 includes a reinforcing keel 31, a supporting steel 32, and a fireproof sealing strip 33. The reinforcing keel 31 is fixed inside the door frame 1 and located between the two door leaves 2. The supporting steel 32 is installed inside the reinforcing keel 31 and fixed inside the door opening. The surface of the reinforcing keel 31 is fitted with a fireproof sealing strip 33 on one side of the door leaf 2.

[0035] It should be noted that the reinforcing keel 31 is made of C-shaped steel, model C100×50×20×2.5. Its two ends are fixed to the inside of the door frame 1 by welding, and its middle part is bolted to the supporting steel 32. The supporting steel 32 is a seamless steel pipe with a diameter of 20-25mm, and one is installed every 300mm along the length of the reinforcing keel 31. Both ends of the supporting steel 32 are embedded in holes pre-reserved in the door opening wall at a depth of not less than 100mm, and are fixed with fireproof cement mortar. The fireproof sealing strip 33 is a circular silicone rubber strip with a diameter 2mm larger than the gap between the reinforcing keel 31 and the door leaf 2, and is fixed to the surface of the reinforcing keel 31 through a slotted structure. The synergy between the reinforcing keel 31 and the supporting steel 32 enhances the deformation resistance of the door frame 1, ensuring that the door deflection does not exceed 1mm under 1200Pa wind pressure. The interference fit between the fireproof sealing strip 33 and the door leaf 2 further improves the normal sealing effect.

[0036] Fireproof sealant 6 is used to fill the gap between the door frame 1 and the wall;

[0037] Specifically, the fireproof sealant 6 is an intumescent fireproof sealant 6 with a construction thickness of 5-8mm. After filling, it is flush with the door frame 1 and the wall surface, forming a continuous sealing ring between the door frame 1 and the wall. The sealant cures for no more than 24 hours at 25℃ and has a temperature resistance range of -30℃ to 150℃ after curing. It solves the problem of smoke leakage at the connection gap between the door frame 1 and the wall. In case of fire, it expands to further seal the gap, so that the smoke tightness of this part meets the Class A requirements specified in GB12955-2008.

[0038] A fireproof expansion strip 7 is installed in the groove at the rotating connection between the door frame 1 and the door leaf 2;

[0039] Specifically, the fire-resistant expanding sealing strip 7 uses 6 strips of graphite-based expanding fire-resistant sealant, 10-15mm wide and 3-5mm thick. It is installed in the groove at the rotating connection between the door frame 1 and the door leaf 2. The groove depth is 1mm greater than the strip thickness. The strip is fixed with high-temperature resistant double-sided adhesive. It begins to expand at 60℃ and completes expansion at 80℃, reaching 3-5 times its original volume. After expansion, it retains a certain degree of elasticity, accommodating the slight deformation of components caused by high temperatures. This strip, working in conjunction with the normal sealing structure, solves the problem of seal failure due to component deformation during a fire, ensuring the door remains effectively smoke-proof for up to 30 minutes after a fire.

[0040] Door leaf 2 includes an outer diamond plate 21, an inner high temperature resistant fireproof steel plate 22, and a fireproof layer 23, with the fireproof layer 23 installed between the outer diamond plate 21 and the inner high temperature resistant fireproof steel plate 22;

[0041] In the door leaf 2, the outer layer of the diamond plate 21 is made of 304 stainless steel with a thickness of 1.2-1.5mm, and the inner layer of high-temperature resistant and fireproof steel plate 22 is made of heat-resistant steel with a thickness of 1.0-1.2mm. The edges of the two are welded together after being folded and interlocked to form a hollow cavity. Reinforcing ribs are evenly arranged at intervals of 150-200mm inside the cavity. The reinforcing ribs are made of the same material as the inner steel plate and are welded to the two steel plates. The outer diamond plate 21 improves the impact resistance of the door leaf 2, the inner heat-resistant steel can withstand temperatures above 600℃, and the reinforcing ribs make the door leaf 2 less prone to deformation at high temperatures, solving the problem of traditional door leaves 2 easily warping in a fire.

[0042] Fireproof layer 23 is set as either rock wool or aluminum silicate fiber thermal insulation and fireproof material;

[0043] The fireproof layer 23 has a thickness of 30-50mm and is made of rock wool board or aluminum silicate fiber board with a density of 120-150kg / m³. It is bonded between the outer diamond plate 21 and the inner high-temperature fireproof steel plate 22 with fireproof adhesive. The gap between the fireproof layer 23 and the cavity wall does not exceed 2mm, and the gap is filled with fireproof sealing cotton. The thermal conductivity of rock wool or aluminum silicate fiber is ≤0.04W / (m・K), and the fire resistance limit is not less than 1.5h. This fireproof layer 23 works in conjunction with the double-layer steel plate structure to improve the heat insulation performance of the door leaf 2, solving the problems of poor heat insulation and easy conduction of high temperature in traditional door leaves 2, thus buying more time for people to escape.

[0044] In addition to the fireproof sealing strip 33 on the edge of the door leaf 2, it also includes a fireproof expansion strip 7 (made of expanded vermiculite and rubber composite) installed in the groove at the rotating connection between the door frame 1 and the door leaf 2. When heated during a fire (temperature ≥60℃), it expands with an expansion rate ≥250%, which can effectively seal the gap at the rotating connection.

[0045] In terms of bidirectional escape, this device utilizes a shared frame structure design, rotatably mounting two door panels 2 within the same door frame 1. Reinforcing components within the door frame 1 enhance the overall structural rigidity, preventing deformation or jamming of the door panels 2 during bidirectional rotation. When personnel apply push force from either side of the door, the door panels 2 can rotate flexibly around their pivot axis, overcoming the limitations of traditional unidirectional opening and achieving smooth bidirectional opening and closing. This ensures that personnel on both sides can pass quickly in emergencies, guaranteeing unobstructed escape routes at all times.

[0046] In terms of fireproof sealing, a graded sealing mechanism is adopted. Under normal conditions, the sealing strip on the edge of the door leaf 2 is embedded in the fireproof sealing groove of the door frame 1. The tight fit forms the first sealing barrier, blocking the penetration of smoke in the daily environment. When a fire occurs, as the temperature rises, the fireproof expansion strip 7 in the groove at the rotating connection between the door frame 1 and the door leaf 2 expands rapidly (usually activated when the temperature reaches above 60°C), filling the gaps and squeezing the sealing strip to form a second reinforced sealing layer. Even if the high temperature causes the components to deform slightly, the gaps can still be compensated by physical expansion, effectively blocking the spread of fire and smoke and meeting the dynamic needs of fire protection.

[0047] A replacement part 5 is provided for easy replacement of the fireproof sealing strip 33 when its service life expires. Specifically, by rotating the nut 533 to disengage it from the surface of the first rod 531 and the second rod 532, the mounting bracket 51 is removed from the door leaf 2. At this time, the strip groove 52 disengages from the surface of the second rod 532, and the fireproof strip 43 is removed from the mounting groove 41. The new fireproof strip 43 is then inserted into the mounting groove 41, and the guide strip 44 on the surface of the fireproof strip 43 is inserted into the guide groove 42 to restrict the fireproof strip 43 during installation. The groove 41 can move in one direction and is easy to install and remove. The mounting bracket 51 is installed on the top and bottom of the movable side of the door leaf 2, and the strip groove 52 on the surface of the mounting bracket 51 is inserted into the second rod 532, so that the second rod 532 fits with the first rod 531. Since the second rod 532 and the first rod 531 are compatible half rings, when they fit together, the nut 533 can be threaded onto the surface of the first rod 531 and the second rod 532 to fix the mounting bracket 51.

[0048] 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 partition door allowing for bidirectional escape, characterized in that, include: Door frame (1), the door frame (1) is fixed to the door opening of the building area by expansion screws, the door frame (1) is provided with two door leaves (2), the door leaves (2) are rotatably installed in the door frame (1), the door frame (1) is fixedly installed with a reinforcing member (3), and the surface of the door frame (1) is provided with a fireproof sealing component (4). The fireproof sealing assembly (4) includes an installation groove (41), a guide groove (42), a fireproof strip (43), and a guide strip (44). The installation groove (41) is opened on the top, bottom, and one side of the door frame (1). The guide groove (42) is opened in the installation groove (41). The fireproof strip (43) is slidably installed in the installation groove (41). The surface of the fireproof strip (43) is provided with a guide strip (44) that matches the guide groove (42).

2. The fireproof partition door with bidirectional escape capability according to claim 1, characterized in that: It also includes a replacement part (5) for easy replacement of the fireproof strip (43). The replacement part (5) includes a mounting bracket (51), a strip groove (52) and a fixing part (53). There are two mounting brackets (51), which are located at the top and bottom of the movable end of the door frame (1) respectively, for preventing the fireproof strip (43) from falling off. The mounting bracket (51) has a strip groove (52) on its surface. The fixing part (53) works in conjunction with the strip groove (52) to fix the mounting bracket (51) to the surface of the door leaf (2).

3. A fireproof partition door with bidirectional escape capability according to claim 2, characterized in that: The fastener (53) includes a first rod (531), a second rod (532), and a nut (533). The first rod (531) is fixed to the surface of the mounting bracket (51), and the second rod (532) is fixed to the surface of the door leaf (2). The strip groove (52) is inserted into the surface of the second rod (532) so that the first rod (531) and the second rod (532) fit together. The nut (533) is threaded onto the surfaces of the first rod (531) and the second rod (532) for fixing the mounting bracket (51).

4. A fire door for bidirectional escape as described in claim 1, characterized in that: The reinforcing member (3) includes a reinforcing keel (31), a supporting steel (32), and a fireproof sealing strip (33). The reinforcing keel (31) is fixed inside the door frame (1) and located between the two door leaves (2). The supporting steel (32) is installed inside the reinforcing keel (31) and fixed inside the door opening. The surface of the reinforcing keel (31) is fitted with a fireproof sealing strip (33) on one side of the door leaf (2).

5. A fireproof partition door with bidirectional escape capability according to claim 1, characterized in that: The gap between the door frame (1) and the wall is filled with fireproof sealant (6).

6. A fireproof partition door with bidirectional escape capability according to claim 1, characterized in that: Fireproof expansion strips (7) are provided in the groove at the rotating connection of the door frame (1) and the door leaf (2).

7. A fireproof partition door with bidirectional escape capability according to claim 1, characterized in that: The door leaf (2) includes an outer diamond plate (21), an inner high-temperature fireproof steel plate (22), and a fireproof layer (23), wherein the fireproof layer (23) is installed between the outer diamond plate (21) and the inner high-temperature fireproof steel plate (22).

8. A fireproof partition door with bidirectional escape capability according to claim 7, characterized in that: The fireproof layer (23) is set as either rock wool or aluminum silicate fiber heat insulation and fireproof material.

Images