Fireproof door

Abstract

The utility model relates to fireproof door design in the field of building safety, in particular to a fireproof door which comprises a door frame and a door leaf, the door frame and the door leaf are connected through hinges, the face, close to the door leaf, of the door frame is a step plate, the step plate is divided into a low-position area and a convex-position area, the convex-position area is provided with an abutting part, and the abutting part abuts against the face, facing outdoors, of the door leaf. A groove and at least one reference strip are arranged in the low-position area of the door frame, a fireproof strip which expands when heated and abuts against the door leaf is installed in the groove, the fireproof strip is arranged in the length direction of the door frame, the fireproof strip is parallel to and abuts against the reference strip, and the face, close to the door leaf, of the fireproof strip is flush with the face, close to the door leaf, of the reference strip. According to the structural design, whether the installation quality of the fireproof strip is qualified and the use state of the fireproof strip can be rapidly judged according to the position relation between the reference strip and the fireproof strip, so that the safety and reliability of the fireproof door are improved.

Description

Technical Field

[0001] This application relates to the design of fire doors in the field of building safety, and in particular to a fire door. Background Technology

[0002] Fire doors, as a crucial component of building safety, play an irreplaceable role in modern architectural design. With increasing societal awareness of fire safety, fire doors not only need to provide basic flame isolation but also maximize the protection of life and property in emergencies. The design and application of fire doors have permeated various types of buildings, especially in special locations such as kindergartens and children's hospitals, where their safety directly impacts the health and lives of vulnerable groups like infants. In recent years, with the increasing complexity of fire environments, the functional requirements for fire doors have become more diversified, particularly in terms of fire and smoke protection performance, where higher standards have been set. The safety of fire doors is not only a technical issue but also a vital link in ensuring public safety; therefore, the testing and maintenance of their quality are particularly important. In practical applications, fire doors must not only meet the basic requirement of flame isolation but also cope with complex fire environments, such as the threat to human health posed by high-temperature smoke. Therefore, the structural design and material selection of fire doors must fully consider these factors to ensure their reliability in emergencies. Currently, commonly available fire doors achieve their fire protection function primarily through various means. Specifically, the methods employed include: first, filling the space between the door frame and the door leaf with rock wool or other insulation materials to prevent heat transfer; second, applying a high-temperature resistant coating to the door surface to enhance its resistance to ablation; and third, installing fire-resistant strips on the door frame to improve sealing performance. Furthermore, to ensure the reliability of fire doors, regular fire and smoke resistance tests are conducted, using specialized equipment to assess the sealing effectiveness of the fire-resistant strips. Simultaneously, the design of fire doors must consider both installation precision and long-term stability to ensure effective operation under various environmental conditions. However, existing technologies for installing and using fire-resistant strips have significant shortcomings. On the one hand, fire-resistant strips are typically fixed to the door frame using adhesive, a method requiring high precision; improper installation can affect the actual effectiveness of the strips. On the other hand, in alternating warm and hot climates, fire-resistant strips are prone to warping, weakening their sealing performance during a fire. However, due to a lack of effective testing methods, it is difficult to quickly and accurately assess the installation quality and usage status of fire-resistant strips. This safety hazard is particularly prominent in places with a large number of infants and young children, such as kindergartens and children's hospitals. Conventional fire and smoke protection testing has a long cycle, which cannot meet the needs of daily monitoring, while it is difficult to quickly assess the quality of fire-resistant strips during routine inspections. Therefore, how to provide a solution that can quickly detect the installation quality and usage status of fire-resistant strips has become an urgent technical problem to be solved. Utility Model Content

[0003] In order to quickly detect the installation quality and usage status of fireproof strips and improve the safety and reliability of fireproof doors, this application provides a fireproof door frame and a fireproof door.

[0004] To achieve the above objectives, this application provides a fire door, including a door frame and a door leaf. The door frame and the door leaf are connected by hinges. The side of the door frame near the door leaf is a stepped plate, which is divided into a low-lying area and a raised area. The raised area is provided with an abutting portion that abuts against the exterior side of the door leaf. The low-lying area of ​​the door frame is provided with a groove and at least one reference strip. The reference strip is provided along the edge of the groove. A fire-resistant strip that expands upon heating and abuts against the door leaf is installed in the groove. The side of the fire-resistant strip near the door leaf is flush with the side of the reference strip near the door leaf. The fire-resistant strip is provided along the length of the door frame, and the reference strip is parallel to and abuts against the fire-resistant strip. By adopting the above technical solution, significant technical effects and safety improvements are achieved through its unique structural features. Specifically, the inner side of the door frame features an innovative stepped surface design, subdivided into a low-lying area and a raised area. The abutment portion in the raised area effectively and tightly fits against the outer side of the door leaf when closed, enhancing the door's sealing performance and effectively preventing the penetration of fire and smoke, thus improving fireproof isolation. Furthermore, because the fireproof strip is set along the length of the door frame, this layout ensures all-around protection for both the door frame and the fireproof strip. The fireproof strip can be heated evenly and fully expanded, thus tightly abutting against the edge of the door leaf. Crucially, the design of the fireproof strips parallel to each other on the door frame and at least one reference strip, which is parallel and abutting against each other, allows the reference strip to serve as an assessment point for monitoring the installation quality and usage status of the fireproof strip in daily life. If the fireproof strip warps, it can be visually observed that the fireproof strip protrudes above the surface of the reference strip, allowing for immediate action and conclusion that the fireproof strip is in poor condition. Timely maintenance or replacement of the fireproof strip is then possible. This not only optimizes the inspection and maintenance mechanism of fire doors but also ensures high accuracy and reliability.

[0005] Preferably, the gap between the reference strip and the door leaf is 1mm-2mm, and the distance between the reference strip and the side of the groove closest to the reference strip is 0.5mm-1mm.

[0006] By adopting the above technical solution, the tiny gap between the reference strip and the door leaf is 1mm-2mm, and the gap between the reference strip and the groove is 0.5mm-1mm. These two gaps are determined based on the axial and radial expansion generated after the fireproof strip is installed in place. When monitoring the installation quality of the fireproof strip in daily life, the installation status of the fireproof strip can be monitored in real time and intuitively by checking whether the fireproof strip is flush with the reference strip and whether the fireproof strip can abut against the reference strip. The installation status of the fireproof strip can be adjusted in a timely manner to avoid affecting the actual use effect of the fireproof strip in a fire.

[0007] Furthermore, the installation design of the heat-expanding fireproof strip not only simplifies the installation process but also enables immediate and intuitive fire status monitoring through its direct contact with the reference strip. Once the ambient temperature rises, triggering the expansion of the fireproof strip, it immediately comes into close contact with the door leaf, forming a solid fire barrier that effectively slows the spread of fire, buying valuable time for personnel evacuation and fire rescue. Preferably, the door leaf comprises: two MDF boards and a fireproof door core disposed between the two MDF boards, with the MDF boards abutting against the contact portion. By adopting the above technical solution, the door leaf of the fire door is composed of two MDF boards and a fireproof door core disposed between them. This structural design not only improves the overall strength of the door leaf but also effectively enhances its fire resistance. When a fire occurs, external flames first come into contact with the surface of the door leaf. During this process, the MDF boards can play a good role in heat insulation, slowing down the rate at which heat is conducted inward. At the same time, the fireproof door core located between the two MDF boards further blocks the high-temperature invasion, extending the time the fire door can withstand flames. Furthermore, because the MDF board fits tightly against the door frame, this design significantly reduces gaps caused by heat deformation, effectively preventing smoke from leaking into the room through the door gaps. Preferably, the door frame is provided with the following components sequentially from the wall side to the door side: a moisture-proof plywood, a first fireproof board, a first decorative panel, a second fireproof board, and a second decorative panel. The groove is located on the first decorative panel, and the abutment is located on the second fireproof board and the second decorative panel. By adopting the above technical solution, the door frame is provided with a moisture-proof plywood, a first fireproof board, a first decorative panel, a second fireproof board, and a second decorative panel sequentially from the wall side to the door side. This multi-layer structure design achieves multiple protective functions. First, the moisture-proof plywood effectively prevents moisture penetration from the wall, avoiding door frame deformation due to moisture. Second, the double-layer fireproof board significantly improves the fire resistance of the overall structure, extending the heat insulation time of the fire door in a fire environment, thereby delaying the spread of fire. Furthermore, by cleverly placing the gap within the first decorative panel and positioning the abutment between the second fireproof board and the second decorative panel, not only are key areas prone to smoke leakage concealed, but the tight fit between the various materials also enhances the seal. Preferably, the door frame, from the wall side to the door side, is sequentially configured with: a moisture-proof plywood, a first decorative panel, a heat-resistant panel, and a second decorative panel. The groove is located within the first decorative panel, and the abutment is located between the heat-resistant panel and the second decorative panel. By employing the above technical solution, arranging the moisture-proof plywood, the first decorative panel, the heat-resistant panel, and the second decorative panel in a specific order inside the door frame, this multi-layered composite structure not only effectively prevents external moisture from entering the door frame but also significantly improves the overall heat resistance of the door frame. When a fire occurs, the high temperature generated by the flames first acts on the second decorative panel; due to its excellent heat resistance, this panel slows down the rate of heat conduction inward.The heat-resistant panel further absorbs and isolates most of the heat, thus preventing high temperatures from damaging the deep structure of the door frame and the door leaf. Furthermore, through the rational combination of the properties of each layer of materials, deformation or cracking caused by temperature changes can be effectively prevented, thereby enhancing the overall stability and safety of the fire door. Preferably, vertical door sleeves are provided on both sides of the door frame. By adopting the above technical solution, adding vertical door sleeves on both sides of the door frame can significantly improve the overall structural stability of the fire door. On the one hand, the presence of the vertical door sleeves can effectively prevent external impact forces from directly acting on the door frame body, thereby avoiding deformation of the door frame due to uneven stress and extending the service life of the fire door. On the other hand, the vertical door sleeves also have good sealing performance, which can further reduce the possibility of dense smoke intruding through the gaps on the side of the door frame in a fire environment. Preferably, the vertical door sleeve is provided with: a first decorative panel and a moisture-proof gusset from the outer surface to the inner surface, with the moisture-proof gusset in contact with the door frame. By adopting the above technical solution, the vertical door sleeve is provided with a first decorative panel and a moisture-proof gusset from the outer surface to the inner surface, and the moisture-proof gusset is in close contact with the door frame. This structural design effectively prevents external moisture from penetrating into the door frame, thus avoiding deformation or damage due to dampness and significantly improving the overall stability and service life of the fire door. Secondly, the first decorative panel not only enhances the appearance of the fire door but also provides some protection, strengthening the vertical door frame's ability to resist external physical damage. The good contact between the moisture-proof plywood and the door frame further strengthens the connection, making the entire fire door structure more robust and reliable. In summary, this design scheme ensures both aesthetics and practicality and safety, providing a strong guarantee for the long-term stable operation of the fire door in complex environments. Preferably, both sides of the top of the door frame are equipped with headboards. By adopting the above technical solution, the headboards are installed on both sides of the top of the door frame, expanding the load-bearing area of ​​the fire door and further improving its sealing performance. Especially in a fire environment, this reduces the possibility of high-temperature smoke penetrating through top gaps, providing a safer and more reliable protective barrier for occupants. Furthermore, this design helps optimize the aesthetic appearance of the fire door, making it more in line with the aesthetic requirements of modern architecture. Preferably, the door header panel is provided with, from the outer surface to the inner surface, a first decorative panel and a moisture-proof gusset, the moisture-proof gusset contacting the door frame. By adopting the above technical solution, the overall strength and durability of the door header area can be effectively improved. On the one hand, the first decorative panel, as the outermost material, not only beautifies the appearance but also forms a protective barrier for the internal structure, preventing external physical damage or chemical corrosion; on the other hand, the way the moisture-proof gusset is tightly attached to the door frame significantly reduces the risk of damage to the door frame caused by moisture penetration, thereby extending the service life of the entire fire door. Preferably, the abutting part is provided with an insertable anti-collision strip, the insertable anti-collision strip abutting against the door leaf.By adopting the above technical solutions, the hard impact between the door leaf and the door frame during opening and closing can be effectively reduced, thereby reducing noise and extending the overall service life of the fire door. Because the insertable anti-collision strip has good elasticity and sealing performance, it can further enhance the sealing effect between the door frame and the door leaf in the event of a fire, preventing high-temperature smoke from seeping into the room through the door gaps. At the same time, this structure is simple and easy to implement, facilitating installation and replacement, and significantly improving the functionality and practicality of the fire door.

[0008] In summary, this application includes at least one of the following beneficial technical effects:

[0009] 1. The door frame is equipped with an abutment part that abuts against the door leaf. A groove is provided for installing a fireproof strip that expands when heated and fits tightly against the door leaf. At least one reference strip is provided near the groove, and the gap between the reference strip and the door leaf is 1mm-2mm. The distance between the reference strip and the groove near the reference strip is 0.5mm-1mm. When the fireproof strip is installed in place, it abuts against the reference strip and is flush with it. This allows for quick detection of the fireproof strip installation quality and usage status, improving the safety and reliability of the fire door.

[0010] 2. The fire door adopts a multi-material combination design, which not only retains good heat insulation performance, but also solves the problem of smoke leakage through the door gap under high temperature conditions, thus comprehensively improving the functionality of the fire door. Attached Figure Description

[0011] Figure 1 This is a structural diagram of a fire door;

[0012] Figure 2 This is a top view of a fire door;

[0013] Figure 3 This is a right-hand view of a fire door;

[0014] Figure 4 This is a structural diagram of style A of a fire door step plate;

[0015] Figure 5 This is a structural diagram of style B of a fire door step.

[0016] Explanation of reference numerals in the attached drawings: 1. Door frame; 2. Door leaf; 3. Hinge; 11. Step plate; 12. Vertical door frame; 13. Door headboard; 111. Groove; 112. Fireproof strip; 113. Reference strip; 114. Abutment part; 115. Inserted anti-collision strip; a. Low position area; b. Protruding position area; 1a. Moisture-proof plywood; 1b. First fireproof board; 1c. First decorative panel; 1d. Second fireproof board; 1e. Second decorative panel; 1f. Heat-resistant panel; 2a. MDF; 2b. Fireproof door core. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0018] This application discloses a fire door, referring to... Figure 1 The fire door mainly consists of a door frame 1 and a door leaf 2, which are connected by a hinge 3.

[0019] Specifically, the side of the door frame 1 closest to the door leaf is a stepped plate 11, which is divided into a low area a and a raised area b. A groove 111 for accommodating a fireproof strip is provided in the low area a of the door frame 1. A reference strip 113 parallel to the groove 111 is provided near the groove 111. An abutment part 114 that fits tightly against the side of the door leaf 2 facing the outside is provided in the raised area b. A groove 111 is provided in the low area of ​​the door frame 1 closest to the door leaf 2. A fireproof strip 112 that expands when heated and can abut against the door leaf 2 is installed in the groove 111. At least one reference strip 113 parallel to the groove 111 is provided near the groove 111. The fireproof strip 112 and the groove 111 are arranged along the length of the door frame 1. After the fireproof strip 112 expands when heated, it fills the gap between the door frame 1 and the door leaf 2, thereby effectively preventing high-temperature smoke from entering the room through the door gap.

[0020] Furthermore, the abutment portion 114 is provided with an insertable anti-collision strip 115, which abuts against the door leaf 2. The insertable anti-collision strip 115 only needs to have good elasticity to further enhance the sealing effect between the door frame 1 and the door leaf 2 in the event of a fire, preventing high-temperature smoke from seeping into the room through the door gap. The number of reference strips 113 can be one or two; in this embodiment, there are two reference strips 113. The two reference strips 113 can abut against both sides of the fireproof strip 112. When a fire occurs, the fireproof strip 112 expands due to heat. The two reference strips 113 restrict the radial expansion of the fireproof strip 112, allowing it to expand to the maximum extent towards the door leaf 2, thereby making the fireproof strip 112 abut against the door leaf 2 more tightly and enhancing the sealing effect of the fireproof strip 112 to a certain extent.

[0021] Specifically, the gap between the reference strip 113 and the door leaf 2 is 1mm-2mm, and the distance between the reference strip 113 and the side of the groove 111 closest to the reference strip 113 is 0.5mm-1mm. When the fireproof strip 112 is installed in place, it abuts against the reference strip 113 and is flush with it. This allows people in places with many infants and young children, such as kindergartens and children's hospitals, to quickly determine whether the fireproof strip 112 is warped or detached and its condition by observing the positional relationship between the reference strip 113 and the fireproof strip 112. This facilitates regular inspections and improves the safety and reliability of the fire door.

[0022] Specifically, refer to Figure 2 and Figure 3 Vertical door frames 12 are installed on both sides of the door frame 1, and door headboards 13 are installed on both sides of the top of the door frame 1. The vertical door frames 12 and door headboards 13 effectively prevent external moisture from penetrating into the interior of the door frame 1, thus avoiding deformation or damage to the door frame 1 due to moisture and reducing the penetration of high-temperature flue gas through the top gaps. The vertical door frames 12 are constructed as follows: a first decorative panel 1c and a moisture-proof plywood 1a, with the moisture-proof plywood 1a in contact with the door frame 1. The door headboards 13 are constructed as follows: a first decorative panel 1c and a moisture-proof plywood 1a, with the moisture-proof plywood 1a in contact with the door frame 1. For details, refer to... Figure 4 and Figure 5The step panel 11 is composed of multiple layers of components. The first type A of the step panel 11 is constructed as follows: a moisture-proof plywood 1a, a first fireproof board 1b, a first decorative panel 1c, a second fireproof board 1d, and a second decorative panel 1e. The second fireproof board 1d and the second decorative panel 1e abut against the door leaf 2. The second type B of the step panel 11 is constructed as follows: a moisture-proof plywood 1a, a first decorative panel 1c, a heat-resistant panel 1f, and a second decorative panel 1e. The heat-resistant panel 1f and the second decorative panel 1e abut against the door leaf 2. The contact surface of the abutment part 114 is selected according to the overall thickness of the door frame 1. The moisture-proof plywood 1a can be made of wood or fiber-reinforced plastic with good waterproof performance, ensuring strength while preventing water absorption and deformation. The moisture-proof plywood 1a and the second fireproof board 1d can be made of products with good fire resistance, such as calcium silicate board or magnesium oxide board, ensuring they can withstand prolonged flame exposure without damage. The moisture-proof plywood 1a and the second decorative panel 1e can be made of traditional wood veneer or other environmentally friendly finishing materials in different colors and patterns, depending on actual needs, resulting in a beautiful and personalized appearance. Specifically, the door leaf 2 includes two MDF boards 2a and a fireproof door core 2b placed between them. The MDF boards 2a are usually made of boards with a certain thickness and flatness, making them sturdy and durable, providing both support and enhanced sealing. The fireproof door core 2b is filled between the two MDF boards 2a and is generally made of rock wool or other heat-insulating materials, providing excellent heat insulation and effectively preventing heat transfer. Overall, the fire door mainly consists of a door frame 1 and door leaves 2, connected by hinges 3. The door frame 1 is designed with abutment part 114 that fits tightly against the door leaf 2. A groove 111 is provided on the side near the door leaf 2, housing a fire-resistant strip 112 that expands upon heating. This fire-resistant strip 112 is arranged along the length of the door frame 1 and, upon heating, fills the gap between the door frame 1 and the door leaf 2, effectively preventing the intrusion of high-temperature smoke. To improve sealing, the abutment part 114 is also equipped with a highly elastic insertable anti-collision strip 115. Meanwhile, vertical door sleeves 12 and a door headboard 13 are installed on both sides and the top of the door frame 1, respectively, using a decorative panel and moisture-proof plywood structure to effectively prevent moisture penetration and avoid deformation of the door frame 1. The door frame 1 is composed of multiple layers of components, and different structures can be selected according to thickness and requirements, such as a combination of moisture-proof plywood, fireproof board, and decorative panel, or a combination of moisture-proof plywood, decorative panel, and heat-resistant panel, ensuring strength and fire resistance. The door leaf 2 is composed of two sturdy and durable MDF boards 2a and a fire-resistant door core 2b in the middle, providing both support and enhanced sealing. The entire design, through the combined application of multiple layers and materials, solves the problem of smoke leakage in traditional fire doors and improves overall safety.

[0023] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fire door, comprising a door frame (1) and a door leaf (2), wherein the door frame (1) and the door leaf (2) are connected by a hinge (3), characterized in that, The side of the door frame (1) near the door leaf (2) is a step plate (11). The step plate (11) is divided into a low area (a) and a convex area (b). The convex area (b) is provided with an abutment part (114). The abutment part (114) abuts against the side of the door leaf (2) facing the outside. The low area (a) is provided with a groove (111) and at least one reference strip (113). The reference strip (113) is provided along the edge of the groove (111). A fireproof strip (112) is installed in the groove (111) and abuts against the door leaf (2) when it expands due to heat. The side of the fireproof strip (112) near the door leaf (2) is flush with the side of the reference strip (113) near the door leaf (2). The fireproof strip (112) is provided along the length of the door frame (1). The reference strip (113) is parallel to and abuts against the fireproof strip (112).

2. A fire door according to claim 1, characterized in that, The gap between the reference strip (113) and the door leaf (2) is 1mm-2mm, and the distance between the reference strip (113) and the side of the groove (111) near the reference strip (113) is 0.5mm-1mm.

3. A fire door according to claim 1, characterized in that, The door leaf (2) includes: two MDF boards (2a) and a fireproof door core (2b) disposed between the two MDF boards (2a), wherein the MDF boards (2a) abut against the abutting part (114).

4. A fire door according to claim 1, characterized in that, The door frame (1) is provided with the following components in sequence from the side against the wall to the side against the door: a moisture-proof plywood (1a), a first fireproof board (1b), a first decorative panel (1c), a second fireproof board (1d), and a second decorative panel (1e). The groove (111) is provided on the first decorative panel (1c), and the abutting part (114) is provided on the second fireproof board (1d) and the second decorative panel (1e).

5. A fire door according to claim 1, characterized in that, The door frame (1) is provided with the following components in sequence from the side against the wall to the side against the door: a moisture-proof plywood (1a), a first decorative panel (1c), a heat-resistant panel (1f), and a second decorative panel (1e). The groove (111) is provided on the first decorative panel (1c), and the abutting part (114) is provided on the heat-resistant panel (1f) and the second decorative panel (1e).

6. A fire door according to claim 4 or 5, characterized in that, Vertical door frames (12) are provided on both sides of the door frame (1).

7. A fire door according to claim 6, characterized in that, The vertical door frame (12) is provided with the following components in sequence from the outer surface to the inner surface: a first decorative panel (1c) and a moisture-proof gusset (1a), wherein the moisture-proof gusset (1a) is in contact with the door frame (1).

8. A fire door according to claim 4 or 5, characterized in that, Both sides of the top of the door frame (1) are provided with door headboards (13).

9. A fire door according to claim 8, characterized in that, The door panel (13) is provided with the following components in sequence from the outer surface to the inner surface: a first decorative panel (1c) and a moisture-proof gusset (1a), wherein the moisture-proof gusset (1a) is in contact with the door frame (1).

10. A fire door according to claim 1, characterized in that, The abutting part (114) is provided with an insertable anti-collision strip (115), which abuts against the door leaf (2).

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