Fireproof door with smoke-proof function
By designing a gear and rack structure and a water tank spraying system on the fire door, the problems of smoke spread and high temperature hazards were solved, achieving the effects of smoke containment and automatic fire extinguishing and cooling.
Patent Information
- Application Number
- CN202520599463.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Existing fire doors are ineffective at preventing the spread of smoke during a fire, allowing smoke to diffuse through gaps and endanger residents' safety.
A fire door with a gear and rack structure was designed. The gear rotation drives the rack to move the sealing plate to close the door gaps. It is also equipped with a water tank and a sprinkler system to automatically spray water to cool down and extinguish fires at high temperatures.
It effectively seals smoke gaps, reduces smoke diffusion, and automatically cools and extinguishes fires at high temperatures, protecting the safety of surrounding residents.
Smart Images
Figure CN223964397U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fire door technology, specifically a fire door with smoke prevention function. Background Technology
[0002] The primary function of fire doors is to prevent the spread of fire. In the event of a fire, they form a physical barrier through their fire-resistant structure, containing the fire within the ignition area and delaying the spread of flames, high temperatures, and toxic fumes to other areas, thus buying crucial time for evacuation and fire rescue.
[0003] Fire doors are typically designed with smoke-proof sealing strips. The expanding sealant at the door seams expands rapidly upon exposure to high temperatures, filling the gaps and effectively preventing smoke penetration. Since approximately 80% of fire-related injuries and fatalities are caused by smoke, the smoke-proof function ensures the relative safety of evacuation routes (such as stairwells).
[0004] Currently, while existing fire doors can prevent the spread of fire during a fire, the large amount of smoke generated during a fire can spread outwards through the gaps at the top and bottom of the fire door, posing a danger to residents. Therefore, a fire door with smoke-proof function is proposed to address the above problems. Utility Model Content
[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a fireproof door with smoke prevention function.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A fireproof door with smoke prevention function, comprising a fireproof door, wherein a slot is provided inside the fireproof door; a gear is rotatably connected inside the slot; a handle is fixedly connected to the end of the gear; a first rack is slidably connected to the inner wall of the slot; the first rack meshes with the gear; a second sealing plate is fixedly connected to the other end of the first rack; a second rack is slidably connected to the inner wall of the slot; the second rack meshes with the gear; and a first sealing plate is fixedly connected to the other end of the second rack.
[0007] Preferably, a water tank is fixedly connected to the end of the fire door; a guide pipe is fixedly connected to the bottom of the water tank; a connecting pipe is fixedly connected to the bottom of the guide pipe; a spray pipe is fixedly connected to the bottom of the water tank; a connecting pipe is fixedly connected to the bottom of the guide pipe, and the other end of the connecting pipe is fixedly connected to the end of the spray pipe; a switch unit is provided inside the water tank.
[0008] Preferably, the switching unit includes a sealing strip; the sealing strip is slidably connected inside the guide tube; a guide plate is fixedly connected to one end of the sealing strip; a limit sealing block is fixedly connected to the other end of the sealing strip and fits against the inner wall of the guide tube; a cylinder is fixedly connected to one end of the guide tube; and the other end of the cylinder is fixedly connected to the inner wall of the guide plate.
[0009] Preferably, the two ends of the sealing strip are fixedly connected to limit sealing blocks, and the other end of the limit sealing block is fixedly connected to the inner wall of the guide tube; the end of the throttle is equipped with an anti-scalding pad.
[0010] Preferably, the first rack and the second rack are on the same horizontal plane, and the first sealing plate and the second sealing plate are symmetrically arranged.
[0011] The beneficial effects of this utility model are:
[0012] This utility model provides a fire door with smoke prevention function. When the user turns the handle, the gear rotates, causing the first and second racks to move in opposite directions. The first rack pushes the second sealing plate to the bottom to seal the gap between the bottom of the fire door and the ground. Then, the second rack moves upward to push the first sealing plate to slide upward to seal the top of the fire door. This reduces the spread of smoke from inside the door to the outside through the gaps at the top and bottom, thus preventing harm to surrounding users.
[0013] This utility model provides a fire door with smoke prevention function. When the fire inside the house is large, it will generate high temperature to bake the surface of the fire door. As the temperature rises, it will trigger the switching unit, which will then open the diversion pipe to allow water inside the water tank to flow through the diversion pipe into the through pipe, and then through the through pipe into the spray pipe. The spray pipe will spray water onto the surface of the fire door and its surroundings to cool the fire door and spray dust to suppress open flames and smoke in the surrounding area. Attached Figure Description
[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.
[0015] In the attached diagram:
[0016] Figure 1 This is a perspective view of the present invention;
[0017] Figure 2 This is a cross-sectional view of the present invention;
[0018] Figure 3This is a perspective view of the guide tube in this utility model;
[0019] Figure 4 yes Figure 3 Enlarged view of point A in the middle.
[0020] Legend:
[0021] 1. Fire door; 21. Card slot; 22. First sealing plate; 23. Gear; 24. Throttle; 25. First rack; 26. Second sealing plate; 27. Second rack; 31. Water tank; 32. Guide pipe; 33. Spray pipe; 34. Through pipe; 41. Sealing strip; 42. Guide plate; 43. Cylinder; 44. Limiting sealing block; 45. Spring; 5. Anti-scalding pad. Detailed Implementation
[0022] 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 skilled in the art without creative effort are within the protection scope of the present utility model.
[0023] Specific implementation examples are given below.
[0024] Please see Figures 1-4 This utility model provides a fire door with smoke prevention function, including a fire door 1. The fire door 1 has a slot 21 inside; a gear 23 is rotatably connected inside the slot 21; a handle 24 is fixedly connected to the end of the gear 23; a first rack 25 is slidably connected to the inner wall of the slot 21; the first rack 25 meshes with the gear 23; a second sealing plate 26 is fixedly connected to the other end of the first rack 25; a second rack 27 is slidably connected to the inner wall of the slot 21; the second rack 27 meshes with the gear 23; and the first sealing plate is fixedly connected to the other end of the second rack 27. 22; During operation, when a fire occurs inside the door, the user forcefully turns the handle 24, causing the gear 23 to rotate. When the gear 23 rotates, it drives the first rack 25 and the second rack 27 to move in opposite directions. This causes the first rack 25 to push the second sealing plate 26 to the bottom, sealing the gap between the bottom of the fire door 1 and the ground. Then, the second rack 27 at the other end moves upward, pushing the first sealing plate 22 to slide upward, sealing the top of the fire door 1. This reduces the spread of smoke from inside the door to the outside through the gaps between the top and bottom of the fire door 1, thus preventing harm to surrounding users.
[0025] Furthermore, such as Figures 3-4As shown, a water tank 31 is fixedly connected to the end of the fire door 1; a guide pipe 32 is fixedly connected to the bottom of the water tank 31; a through pipe 34 is fixedly connected to the bottom of the guide pipe 32; a spray pipe 33 is fixedly connected to the bottom of the water tank 31; a through pipe 34 is fixedly connected to the bottom of the guide pipe 32, and the other end of the through pipe 34 is fixedly connected to the end of the spray pipe 33; a switch unit is provided inside the water tank 31; during operation, when the fire inside the house is large, it will generate high temperature to bake the surface of the fire door 1. As the temperature increases, the switch unit will be triggered, and then the switch unit will be activated to open the guide pipe 32 so that the water inside the water tank 31 flows through the guide pipe 32 to the inside of the through pipe 34, and then flows through the through pipe 34 to the inside of the spray pipe 33. The water is then sprayed onto the surface of the fire door 1 and its surroundings through the spray pipe 33 to cool the fire door 1 and spray dust to suppress open flames and smoke in the surrounding area.
[0026] Furthermore, such as Figures 3-4 As shown, the switching unit includes a sealing strip 41; the sealing strip 41 is slidably connected inside the guide pipe 32; a guide plate 42 is fixedly connected to one end of the sealing strip 41; a limit sealing block 44 is fixedly connected to the other end of the sealing strip 41 and adheres to the inner wall of the guide pipe 32; a cylinder 43 is fixedly connected to one end of the guide pipe 32; the other end of the cylinder 43 is fixedly connected to the inner wall of the guide plate 42; during operation, air is compressed and filled inside the rodless chamber of the cylinder 43, and then thermal expansion and contraction occur inside due to high temperature baking, causing the piston rod inside the cylinder 43 to be pushed to the side, causing the guide plate 42 to pull the sealing strip 41 to slide outward, thereby opening the guide pipe 32, allowing water inside the water tank 31 to flow through the guide pipe 32 into the spray pipe 33, thereby achieving the effects of dust suppression, fire extinguishing, and cooling of the fire door 1.
[0027] Furthermore, such as Figures 3-4 As shown, the two ends of the sealing strip 41 are fixedly connected to the limiting sealing block 44, and the other end of the limiting sealing block 44 is fixedly connected to the inner wall of the guide pipe 32. During operation, when the guide plate 42 pulls the sealing strip 41 to the side, it pulls the spring 45 to generate elastic force. When the fire inside the door is dealt with, the cylinder 43 is cooled and reset. Then, the spring 45 pulls the sealing strip 41 to reset, so as to facilitate the next normal use and treatment.
[0028] Furthermore, such as Figures 1-2 As shown, an anti-scalding pad 5 is installed at the end of the throttle 24. During operation, the anti-scalding pad 5 installed at the end of the throttle 24 can prevent scalding and reduce the heat exposure of the fire door 1 and the throttle 24, thus preventing burns to the user.
[0029] Furthermore, such as Figures 1-2As shown, the first rack 25 and the second rack 27 are on the same horizontal plane, and the first sealing plate 22 and the second sealing plate 26 are symmetrically arranged.
[0030] Working principle: When a fire occurs inside the door, the user forcefully turns the handle 24, causing the gear 23 to rotate. This rotation drives the first rack 25 and the second rack 27 to move in opposite directions. The first rack 25 pushes the second sealing plate 26 to the bottom, sealing the gap between the bottom of the fire door 1 and the ground. Meanwhile, the second rack 27 moves upwards, pushing the first sealing plate 22 upwards to seal the top of the fire door 1, reducing the spread of smoke from inside the door through the gaps and preventing harm to surrounding users. When the fire inside is large, the high temperature heats the surface of the fire door 1. As the temperature rises, the switching unit is triggered, opening the diversion pipe 32. This allows water from the water tank 31 to flow through the diversion pipe 32 into the through pipe 34, and then through the through pipe 34 into the spray pipe 33, spraying water onto the surface of the fire door 1. The system sprays water from the surrounding area to cool the fire door 1 and suppress dust from open flames and smoke. Air is compressed and filled into the rodless chamber of cylinder 43. Due to the high temperature, thermal expansion and contraction occur, causing the piston rod inside cylinder 43 to push to the side. This pulls the guide plate 42 to the side, causing the sealing strip 41 to slide outwards, opening the guide pipe 32. Water from the water tank 31 then flows through the guide pipe 32 into the spray pipe 33, thus suppressing dust. The fire extinguishing and cooling effects on the fire door 1 are achieved. When the guide plate 42 pulls the sealing strip 41 to the side, it pulls the spring 45 to generate elastic force. When the fire inside the door is extinguished, the cylinder 43 is cooled and reset. Then, the spring 45 pulls the sealing strip 41 to reset, which facilitates normal use next time. The anti-scalding pad 5 is installed at the end of the handle 24 to prevent scalding and reduce the heat exposure of the fire door 1 and the handle 24, thus preventing burns to the user.
[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A fire door with smoke prevention function, comprising a fire door (1), characterized in that: The inside of the fireproof door (1) is provided with a clamping groove (21); the inside of the clamping groove (21) is rotatably connected with a gear (23); the end of the gear (23) is fixedly connected with a handle (24); the inner side wall of the clamping groove (21) is slidably connected with a first rack (25); the first rack (25) and the gear (23) are in mesh with each other; the other end of the first rack (25) is fixedly connected with a second sealing plate (26); the inner side wall of the clamping groove (21) is slidably connected with a second rack (27); the second rack (27) and the gear (23) are in mesh with each other; the other end of the second rack (27) is fixedly connected with a first sealing plate (22).
2. The fire door with smoke prevention function according to claim 1, characterized in that: The end of the fireproof door (1) is fixedly connected with a water tank (31); the bottom of the water tank (31) is fixedly connected with a flow guide pipe (32); the bottom of the flow guide pipe (32) is fixedly connected with a through pipe (34); the bottom of the water tank (31) is fixedly connected with a spraying pipe (33); the bottom of the flow guide pipe (32) is fixedly connected with the through pipe (34), and the other end of the through pipe (34) is fixedly connected to the end of the spraying pipe (33); the inside of the water tank (31) is provided with a switch unit.
3. The fire door with smoke prevention function according to claim 2, characterized in that: The switch unit comprises a sealing strip (41); the inside of the flow guide pipe (32) is slidably connected with the sealing strip (41); the end of the sealing strip (41) is fixedly connected with a guide plate (42); the other end of the sealing strip (41) is fixedly connected with a limiting sealing block (44), and is attached to the inner side wall of the flow guide pipe (32); the end of the flow guide pipe (32) is fixedly connected with a gas cylinder (43); the other end of the gas cylinder (43) is fixedly connected to the inner side wall of the guide plate (42).
4. The fire door with smoke prevention function according to claim 3, characterized in that: The two ends of the sealing strip (41) are fixedly connected with limiting sealing blocks (44), and the other end of the limiting sealing block (44) is fixedly connected to the inner side wall of the flow guide pipe (32).
5. The fire door with smoke prevention function according to claim 1, characterized in that: The end of the handle (24) is provided with an anti-scald pad (5).
6. The fire door with smoke prevention function according to claim 1, characterized in that: The first rack (25) and the second rack (27) are in the same horizontal plane, and the first sealing plate (22) and the second sealing plate (26) are symmetrically arranged with each other.