A fire door

Abstract

The utility model discloses a kind of heat-insulated fireproof doors, comprising: door frame and two groups of fireproof door panels, two groups of fireproof door panels are fixedly installed with heat insulation layer between, heat insulation layer one end is provided with installation port, installation port is fixedly installed with door gap plugging mechanism, and the plugging end of door gap plugging mechanism extends from the gap between two groups of fireproof door panels, and two groups of fireproof door panels are rotatably installed in door frame, and then make door gap plugging mechanism can extend from between fireproof door panel and touch on the inner wall surface of door frame.The application is designed by door gap plugging mechanism, so that it passes through the double protection mechanism of " primary sealing + automatic plugging", first by fireproof door panel and spacer plate form preliminary blocking, then utilize zirconium fibre composite felt to automatically expand and fill gap when fire, substantially delay the speed of high-temperature dense smoke diffusion to indoor, and gain more escape time for personnel.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, specifically to a heat-insulated fire door. Background Technology

[0002] Fire doors are doors that can meet the requirements of fire resistance stability, fire door 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 locations. In addition to the functions of ordinary doors, fire doors also prevent the spread of fire and smoke, thus ensuring the safe evacuation of personnel.

[0003] For example, Chinese authorized patent CN222228394U discloses a heat-insulating fireproof door, including a fireproof door side body, a door core inside the fireproof door side body, and a decorative fireproof paper on the outside of the door core and the fireproof door side body. The fireproof door side body has a door core mounting part inside, which is located in the middle of the fireproof door side body. The door core is connected to the door core by fixing screws in the door core mounting part. Fireproof felt is provided on both the inner and outer sides of the door core mounting part, and a panel is provided on the outer side of the fireproof felt. The panel is connected to the fireproof door side body by fixing screws, and the outer side of the panel is covered with decorative fireproof paper. This utility model is relatively simple to install, lightweight, and has good sound insulation and fireproof performance, and is suitable for areas such as bedroom doors that require fire protection.

[0004] However, the aforementioned insulated fire doors cannot seal the gaps in the door during the process of blocking the fire source. This can cause some smoke to seep into the room through the gaps or keyholes, leading to an expansion of the fire. Firefighters will have to spend more time and energy controlling the fire and rearranging firebreaks, thus delaying the rescue of trapped people and increasing the difficulty and cost of the rescue. Utility Model Content

[0005] The purpose of this utility model is to provide a heat-insulated fireproof door to solve the problems mentioned in the background art, such as the inability of door gaps to automatically seal, resulting in the leakage of high-temperature smoke, which causes people inside the room to be trapped due to inhalation of toxic gases or obstruction of vision, the failure of the fireproof door structure due to accelerated heat transfer, and the delay of fire rescue due to the spread of fire and obstruction of smoke.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A heat-insulated fireproof door includes: a door frame and two sets of fireproof door panels. A heat insulation layer is fixedly installed between the two sets of fireproof door panels. An installation opening is provided at one end of the heat insulation layer. A door gap sealing mechanism is fixedly installed in the installation opening. The sealing end of the door gap sealing mechanism extends out from the gap between the two sets of fireproof door panels. The two sets of fireproof door panels are rotatably installed inside the door frame, so that the door gap sealing mechanism can extend out from between the fireproof door panels and abut against the inner wall surface of the door frame.

[0008] Preferably, a door closer is fixedly installed at one end of the fireproof door panel, while the other end of the door closer is fixedly installed at one end of the door frame, and a heat insulation plate is filled in the installation opening to house the door gap sealing mechanism.

[0009] Preferably, a sealing plate is extended and installed on the inner wall surface of the door frame, and the sealing plate can fit against the fireproof door panel to form a primary seal when the fireproof door panel is rotated and closed.

[0010] Preferably, the door gap sealing mechanism includes an air tank, which is fixedly installed in the installation opening and encased in a heat insulation plate. Exhaust pipes are installed on all four sides of the air tank, and the exhaust pipes are sealed and connected to the air guide pipes. The air guide pipes are installed inside the heat insulation layer and extend out from all four sides of the heat insulation layer.

[0011] Preferably, a zirconia fiber composite felt is fixedly connected to the outer surface of the heat insulation layer, the zirconia fiber composite felt is connected to the through-hole air duct, and the inner surface of the zirconia fiber composite felt is coated with a phosphate-based flexible coating with a thickness of 0.1 to 0.5 mm.

[0012] Preferably, the expansion section inside the exhaust pipe is filled with glass spheres, the glass spheres are filled with thermosensitive expansion fluid, and the exhaust pipe section filled with the glass spheres is in contact with the heat-conducting plate, while the heat-conducting plate is embedded in both ends of the heat insulation plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Effect of heat-sensing automatic sealing technology

[0015] Highly efficient smoke and fire prevention: The door gap sealing mechanism expands due to heat conduction, filling the gap between the door frame and the fireproof door panel, preventing the leakage of high-temperature smoke and improving the sealing performance of the fire door.

[0016] Passive and reliable operation: No external power supply or manual operation is required. Even in extreme scenarios such as fire or power outage, it can still be passively triggered by heat sensing to ensure the fire protection function remains effective.

[0017] 2. Effectiveness of Inflatable Expansion Sealing Technology

[0018] Precise thermal response sealing: When the glass ball is heated, it breaks and releases compressed gas, which causes the zirconia fiber composite felt to expand and tightly fit the gap through the phosphate coating, achieving a dynamic seal.

[0019] High-temperature resistance and flexibility: The phosphate-based coating combines heat resistance and flexibility, making it less prone to cracking at high temperatures and ensuring long-term sealing performance.

[0020] Assisting fire rescue: Reducing the obstruction of firefighters by smoke and heat leakage through door gaps, lowering the difficulty and cost of rescue, and increasing the success rate of rescue. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall front and back structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the door gap sealing mechanism of this utility model extending from between two sets of fireproof door panels;

[0023] Figure 3 This is a schematic diagram of the structure of the heat insulation layer and heat insulation board of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the gas storage tank and the zirconium oxide fiber composite felt of this utility model;

[0025] Figure 5 This is a schematic diagram of the door gap sealing mechanism of this utility model.

[0026] In the diagram: 1. Door frame; 101. Fireproof door panel; 102. Door closer; 103. Insulation board; 104. Sealing board; 105. Insulation layer; 106. Heat-conducting plate; 2. Door gap sealing mechanism; 201. Gas tank; 202. Gas duct; 203. Zirconia fiber composite felt; 204. Exhaust pipe; 205. Glass ball. Detailed Implementation

[0027] 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.

[0028] like Figures 1-3As shown, this embodiment provides a heat-insulated fire door, including: a door frame 1 and two sets of fire door panels 101. A heat insulation layer 105 is fixedly installed between the two sets of fire door panels 101. One end of the heat insulation layer 105 has an installation opening 108. A door gap sealing mechanism 2 is fixedly installed in the installation opening 108. The sealing end of the door gap sealing mechanism 2 extends out from the gap between the two sets of fire door panels 101, while the two sets of fire door panels 101 are rotatably installed inside the door frame 1, so that the door gap sealing mechanism 2 can extend out from between the fire door panels 101 and abut against the inner wall surface of the door frame 1. A door closer 102 is fixedly installed at one end of the fire door panel 101, and the other end of the door closer 102 is fixedly installed at one end of the door frame 1. A heat insulation plate 103 is filled in the installation opening 108 to house the door gap sealing mechanism 2. A sealing plate 104 is installed on the inner wall of the door frame 1. The sealing plate 104 can fit against the fire door panel 101 to form a primary seal when the fire door panel 101 is rotated and closed.

[0029] Through the design of the fireproof door panel 101, door frame 1, heat insulation board 103, heat insulation layer 105, heat-conducting plate 106, and door gap sealing mechanism 2, when a fire occurs, heat will be rapidly transferred to the fireproof door panel 101. The closing of the fireproof door panel 101 will form a preliminary seal by contacting the sealing plate 104 inside the door frame 1 to block heat and smoke. The door closer 102 ensures that the fireproof door panel 101 closes automatically. The sealing plate 104 and the fireproof door panel 101 form a primary seal, but there is still a risk of smoke leakage through gaps. At this time, the heat is conducted through the fireproof door panel 101 to the heat-conducting plate 106 inside the heat insulation layer 105, and the heat-conducting plate 106 transfers the heat to the door gap sealing mechanism 2. The door gap sealing mechanism 2 is heated to the set threshold and then passively triggered. It expands and extends from between the two fire door panels 101 and fits tightly against the inner wall of the door frame 1 to fill the gap between the door frame 1 and the fire door panel 101, preventing high-temperature smoke from leaking through the door gap, thereby improving the smoke and fire resistance performance of the fire door. The whole process does not require external power or manual operation and can work reliably even in extreme situations such as power failure or unconsciousness. For example, when the circuit is damaged by fire, the traditional electric sealing device will fail, but this design can still complete the door gap sealing in time by heat sensing, ensuring that the fire door functions normally.

[0030] like Figures 4-5As shown, the door gap sealing mechanism 2 includes a gas storage tank 201, which is fixedly installed inside the mounting port 108 and fitted inside the heat insulation plate 103. Exhaust pipes 204 are installed on all four sides of the gas storage tank 201, and the exhaust pipes 204 are sealed and connected to the air guide pipes 202. The air guide pipes 202 are installed inside the heat insulation layer 105 and extend out from all four sides of the heat insulation layer 105. A zirconia fiber composite felt 203 is fixedly connected to the outer surface of the heat insulation layer 105. The zirconia fiber composite felt 203 is connected to the extending air guide pipes 202, and the inner surface of the zirconia fiber composite felt 203 is coated with a phosphate-based flexible coating with a thickness of 0.1–0.5 mm. The expansion section inside the exhaust pipe 204 is filled with glass balls 205, which are filled with thermosensitive expansion fluid. The exhaust pipe 204 with the glass ball 205 section is in contact with the heat-conducting plate 106, which is embedded in both ends of the heat insulation plate 103.

[0031] Through the design of the gas storage tank 201, the gas guide pipe 202, the zirconia fiber composite felt 203, the exhaust pipe 204, and the glass ball 205, when heat is conducted through the fireproof door panel 101 to the heat-conducting plate 106 inside the insulation layer 105, the heat-conducting plate 106 will transfer the heat to the glass ball 205 inside the exhaust pipe 204, causing it to be heated. The heated glass ball 205 will expand due to the heat-sensitive expansion fluid filled inside. When the temperature reaches a set threshold, the glass ball 205 will break. After the glass ball 205 breaks, the compressed gas in the gas storage tank 201 will fill the zirconia fiber composite felt 203 through the exhaust pipe 204 and the gas guide pipe 202. The inner surface of the zirconia fiber composite felt 203 is coated with... The phosphate-based flexible coating deforms under gas pressure, together with the expanded zirconia fiber composite felt 203, to fill the gap between the door frame 1 and the fire door panel 101, thus sealing the door gap. Furthermore, due to the heat resistance and flexibility of the phosphate-based flexible coating, it does not easily crack under high temperatures, allowing it to tightly adhere to the gap surface, effectively sealing the door gap and preventing high-temperature smoke from leaking through. This improves the fire door's smoke and fire resistance performance, reduces the obstruction of high-temperature smoke and heat leaking through the door gap to firefighters, lowers the danger during rescue operations, and enables firefighters to more easily approach the fire source and carry out rescue work, reducing rescue difficulty and costs, and increasing the success rate of rescue operations.

[0032] Based on the above technical solution, the working steps of this solution are summarized as follows: When a fire occurs, heat is rapidly transferred to the fireproof door panel 101. The closing of the fireproof door panel 101 forms a preliminary seal with the sealing plate 104 inside the door frame 1 to block heat and smoke. The door closer 102 ensures that the fireproof door panel 101 closes automatically. The sealing plate 104 and the fireproof door panel 101 form a primary seal, but there is still a risk of smoke leakage through gaps. At this time, heat is conducted through the fireproof door panel 101 to the heat-conducting plate 106 inside the insulation layer 105. The heat-conducting plate 106 transfers heat to the glass ball 205 inside the exhaust pipe 204, where it is heated. The heated glass ball 205 is then heated by the internal filling... The heat-sensitive expansion liquid expands when heated. When the temperature reaches the set threshold, the glass ball 205 breaks. After the glass ball 205 breaks, the compressed gas in the gas storage tank 201 will fill the zirconia fiber composite felt 203 through the exhaust pipe 204 and the gas guide pipe 202. The phosphate-based flexible coating on the inner surface of the zirconia fiber composite felt 203 deforms together with the expanding zirconia fiber composite felt 203 under the action of gas pressure to fill the gap between the door frame 1 and the fireproof door panel 101 to seal the door gap. Moreover, because the phosphate-based flexible coating has heat resistance and flexibility, it will not easily break in the high temperature environment and can tightly fit the surface of the gap to achieve effective sealing of the door gap.

[0033] In summary: Through the dual protection mechanism of "primary sealing + automatic sealing", the fire door panel 101 and the partition 104 first form an initial barrier, and then the zirconium oxide fiber composite felt 203 automatically expands and fills the gaps during a fire, which greatly slows down the speed at which high temperature and dense smoke spread into the room, giving people more time to escape.

[0034] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model 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 this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat-insulated fireproof door, characterized in that, include: The room includes a door frame and two sets of fireproof door panels. A heat insulation layer is fixedly installed between the two sets of fireproof door panels. One end of the heat insulation layer has an installation opening. A door gap sealing mechanism is fixedly installed in the installation opening. The sealing end of the door gap sealing mechanism extends out from the gap between the two sets of fireproof door panels. The two sets of fireproof door panels are rotatably installed inside the door frame, so that the door gap sealing mechanism can extend out from between the fireproof door panels and touch the inner wall surface of the door frame.

2. The insulated fire door according to claim 1, characterized in that: A door closer is fixedly installed at one end of the fireproof door panel, and the other end of the door closer is fixedly installed at one end of the door frame. A heat insulation board is filled in the installation opening to house the door gap sealing mechanism.

3. The heat-insulating fireproof door according to claim 1, characterized in that: A sealing plate is installed extending from the inner wall of the door frame, which can fit against the fireproof door panel to form a primary seal when the door panel is rotated and closed.

4. The heat-insulating fireproof door according to claim 1, characterized in that: The door gap sealing mechanism includes a gas storage tank, which is fixedly installed in the installation port and encased in a heat insulation plate. Exhaust pipes are installed on all four sides of the gas storage tank, and the exhaust pipes are sealed and connected to the air guide pipes. The air guide pipes are installed inside the heat insulation layer and extend out from all four sides of the heat insulation layer.

5. A heat-insulating fireproof door according to claim 1, characterized in that: The outer surface of the heat insulation layer is fixedly connected to a zirconia fiber composite felt, which is connected to the through-hole air duct, and the inner surface of the zirconia fiber composite felt is coated with a phosphate-based flexible coating with a thickness of 0.1 to 0.5 mm.

6. A heat-insulating fireproof door according to claim 4, characterized in that: The expansion section inside the exhaust pipe is filled with glass spheres, which are filled with a thermosensitive expansion fluid. The exhaust pipe section containing the glass spheres is in contact with a heat-conducting plate, which is embedded in both ends of the heat insulation plate.

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