Fireproof door with smoke isolation function
By introducing water-swellable sealing strips and a water pump system into fire doors, the problem of inadequate sealing of fire doors was solved, achieving good smoke isolation and remote fire information transmission, thus enhancing escape safety.
Patent Information
- Application Number
- CN202520505211.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-03-21
AI Technical Summary
Existing fire doors cannot completely seal when closed, allowing dense smoke from a fire to seep through the gaps, hindering people's escape and resulting in poor smoke isolation.
Design a fire door with a water-swellable sealing strip. After a smoke alarm detects dense smoke, a water pump is activated to deliver water to the water-swellable sealing strip. After expansion, the water seals the gap between the door frame and the fire door. The door is also equipped with a G module and a signal transmitter to enable remote fire information transmission.
It achieves excellent smoke isolation, prevents dense smoke from penetrating, enhances the safety of personnel escaping, and provides remote fire information transmission capabilities.
Smart Images

Figure CN223975068U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire door technology, specifically a fire door with smoke isolation function. Background Technology
[0002] Fire doors are key fire protection facilities in buildings. They are doors that can meet the requirements of fire resistance stability, integrity and heat insulation within a certain period of time. Fire doors are fire-resistant partitions with a certain degree of fire resistance installed in fire compartments, evacuation stairwells, vertical shafts and other similar spaces. They are designed to prevent the spread of fire and smoke and ensure the safe evacuation of personnel, playing an important role in fire protection.
[0003] According to patent number CN107905700B published on the China Patent Network, the patent title is "A Steel Fireproof Door and Its Manufacturing Process," belonging to the field of fireproof doors. The patent aims to provide a steel fireproof door and its manufacturing process. The key technical points are: it includes a first door body and a second door body installed on the same plane. The first and second door bodies are hinged to a wall on opposite sides along the vertical direction. The first door body has first closing grooves at both its upper and lower ends. A first closing plate is slidably connected to the first door body within the first closing groove. A third closing plate is provided inside the first door body to drive the first closing plate to move vertically. A driving component; the upper and lower ends of the second door body are provided with second sealing grooves, and the second door body is slidably connected to a second sealing plate in the second sealing groove. The second door body is provided with a second driving component that drives the second sealing plate to move in the vertical direction. The advantage of this invention is that it reduces the gap between the door body and the ground and ceiling, thereby reducing the possibility of dense smoke entering the safe space blocked by the steel fire door. However, the fire door has poor smoke isolation effect. When the fire door is closed, the fire door and the door frame cannot be completely sealed. Dense smoke generated by the fire will seep through the gaps to the other side of the fire door, which will affect the escape of personnel.
[0004] Therefore, fire doors need to be redesigned and modified to improve their smoke-blocking performance. Utility Model Content
[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a fire door with smoke-proof function, which has the advantage of good smoke-proof effect and solves the problems of poor smoke-proof effect of fire doors, and the inability to completely seal between the fire door and the door frame when the fire door is closed, allowing dense smoke generated by the fire to seep through the gaps to the other side of the fire door, thus affecting the escape of personnel.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a fire door with smoke-proof function, comprising a door frame, a fire door movably connected to the inner wall of the door frame via pins, water-swellable sealing strips fixedly connected to the top, bottom, left, and right sides of the fire door, a water supply pipe for use with the water-swellable sealing strips fixedly connected to the inner wall of the fire door, a storage box fixedly connected to the front side of the fire door, a water storage tank fixedly connected to the bottom of the inner wall of the storage box, and a small water pump fixedly connected to the bottom of the inner wall of the storage box and at the bottom of the water storage tank. The small water pump has an inlet pipe connected to its input end, the top of which is connected to the bottom of the water storage tank. The small water pump also has an outlet pipe connected to its output end. The outlet pipe extends through the placement box and reaches the front of the inner wall of the fire door. The outlet pipe is connected to the front of the water supply pipe. A control terminal is fixedly connected to the rear of the inner wall of the placement box. The output of the control terminal is electrically connected to the input end of the small water pump. Smoke detectors are fixedly connected to both the front and rear of the fire door. The output of the smoke detectors is electrically connected to the input of the control terminal.
[0007] In a preferred embodiment of this invention, the output terminal of the control terminal is electrically connected to a G module, the rear side of the G module is fixedly connected to the rear side of the inner wall of the placement box, and the output terminal of the G module is electrically connected to a signal transmitter, the right side of the signal transmitter is fixedly connected to the left side of the placement box.
[0008] As a preferred embodiment of this utility model, the front side of the placement box is provided with heat dissipation holes, and the heat dissipation holes are elongated.
[0009] As a preferred embodiment of this invention, the fire door is fixedly connected to both the front and rear sides with handles, and the handles are U-shaped.
[0010] As a preferred embodiment of this invention, the surface of the grip is provided with anti-slip texture, and the anti-slip texture is rhomboid in shape.
[0011] As a preferred embodiment of this utility model, a sealing strip is fixedly connected to the rear side of the inner wall of the door frame and the rear side of the fire door, and the sealing strip is made of rubber.
[0012] As a preferred embodiment of this invention, the placement box is made of stainless steel and is rectangular in shape.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] 1. In this utility model, when the smoke alarm detects dense smoke, the control terminal sends a signal to the small water pump to start the pump. The pump then delivers water to the water pipe, which in turn directs the water to the water-swellable sealing strip. Upon contact with the water, the strip expands and seals the gap between the door frame and the fire door, thus achieving a good smoke-proof effect.
[0015] 2. This utility model, by setting up a G module and a signal transmitter, can remotely transmit fire information, which is convenient for users. Attached Figure Description
[0016] Figure 1 This is a perspective view of the door frame structure of this utility model;
[0017] Figure 2 This is a front sectional view of the placement box structure of this utility model;
[0018] Figure 3 This is a top sectional view of the fire door structure of this utility model;
[0019] Figure 4 This is a front sectional view of the fire door structure of this utility model;
[0020] Figure 5 This is a structural system diagram of the fire door of this utility model.
[0021] In the diagram: 1. Door frame; 2. Fire door; 3. Water-swellable sealing strip; 4. Water supply pipe; 5. Storage box; 6. Water storage tank; 7. Small water pump; 8. Inlet pipe; 9. Outlet pipe; 10. Control terminal; 11. Smoke alarm; 12. 5G module; 13. Signal transmitter; 14. Heat dissipation hole; 15. Handle; 16. Anti-slip texture; 17. Sealing strip. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] like Figures 1 to 5As shown, this utility model provides a fire door with smoke-proof function, including a door frame 1. A fire door 2 is movably connected to the inner wall of the door frame 1 via a pin. Water-swellable sealing strips 3 are fixedly connected to the top, bottom, left, and right sides of the fire door 2. A water supply pipe 4, which works in conjunction with the water-swellable sealing strips 3, is fixedly connected to the inner wall of the fire door 2. A storage box 5 is fixedly connected to the front side of the fire door 2. A water storage tank 6 is fixedly connected to the bottom of the inner wall of the storage box 5. A small water pump 7 is fixedly connected to the bottom of the inner wall of the storage box 5 and located at the bottom of the water storage tank 6. The small water pump 7 delivers water... The inlet end is connected to a water inlet pipe 8, the top of which is connected to the bottom of the water storage tank 6. The output end of the small water pump 7 is connected to a water outlet pipe 9. The rear side of the water outlet pipe 9 passes through the placement box 5 and extends to the front side of the inner wall of the fire door 2. The rear side of the water outlet pipe 9 is connected to the front side of the water supply pipe 4. A control terminal 10 is fixedly connected to the rear side of the inner wall of the placement box 5. The output end of the control terminal 10 is electrically connected to the input end of the small water pump 7. Smoke detectors 11 are fixedly connected to both the front and rear sides of the fire door 2. The output end of the smoke detector 11 is electrically connected to the input end of the control terminal 10.
[0024] refer to Figure 2 The output of the control terminal 10 is electrically connected to a 5G module 12. The rear side of the 5G module 12 is fixedly connected to the rear side of the inner wall of the placement box 5. The output of the 5G module 12 is electrically connected to a signal transmitter 13. The right side of the signal transmitter 13 is fixedly connected to the left side of the placement box 5.
[0025] As a technical optimization of this utility model, by setting up a 5G module 12 and a signal transmitter 13, fire information can be transmitted remotely, which is convenient for users.
[0026] refer to Figure 1 The front side of the placement box 5 has a heat dissipation hole 14, which is long and narrow.
[0027] As a technical optimization of this utility model, by providing heat dissipation holes 14, the control terminal 10 can be cooled to prevent it from being damaged due to overheating.
[0028] refer to Figure 1 Handles 15 are fixedly connected to both the front and rear sides of the fire door 2. The handles 15 are U-shaped.
[0029] As a technical optimization of this utility model, by setting the handle 15, the contact area between the user's hands and the fire door 2 can be increased, making it easier for the user to open and close the fire door 2.
[0030] refer to Figure 1 The surface of the grip 15 is provided with anti-slip texture 16, which is diamond-shaped.
[0031] As a technical optimization of this utility model, by setting anti-slip texture 16, the friction between the user's hands and the handle 15 can be increased, preventing the handle 15 from slipping out of the hand during use.
[0032] refer to Figure 3 A sealing strip 17 is fixedly connected to the rear side of the inner wall of the door frame 1 and the rear side of the fire door 2. The sealing strip 17 is made of rubber.
[0033] As a technical optimization of this utility model, by setting a sealing strip 17, the sealing performance between the door frame 1 and the fire door 2 can be increased, further preventing the escape of smoke.
[0034] refer to Figure 1 The placement box 5 is made of stainless steel and is rectangular in shape.
[0035] As a technical optimization of this utility model, by setting a stainless steel placement box 5, it is possible to prevent the placement box 5 from rusting and to prevent the placement box 5 from being damaged due to rusting.
[0036] The working principle and usage process of this utility model are as follows: First, the smoke detector 11 detects the smoke, and the detection data is transmitted to the control terminal 10. The control terminal 10 processes and analyzes the data. When the smoke detector 11 detects dense smoke, the control terminal 10 sends a signal to the small water pump 7, causing the small water pump 7 to start. The input end of the small water pump 7 generates suction, which absorbs water from the water storage tank 6 through the inlet pipe 8, causing the water to be discharged from the output end of the small water pump 7. The water is then transported to the water supply pipe 4 through the outlet pipe 9, and finally, the water flows to the water-swellable sealing strip 3 through the water supply pipe 4. The water-swellable sealing strip 3 expands upon contact with water, thus sealing the gap between the door frame 1 and the fire door 2, achieving a good smoke-proof effect.
[0037] In summary, this fire door with smoke-proof function solves the problems of poor smoke-proof performance of fire doors and the inability to completely seal between the fire door and the door frame when closed, allowing dense smoke from a fire to seep through the gaps to the other side of the fire door, thus affecting personnel escape. This is achieved by installing a door frame 1, a fire door 2, a water-swellable sealing strip 3, a water supply pipe 4, a storage box 5, a water storage tank 6, a small water pump 7, an inlet pipe 8, an outlet pipe 9, a control terminal 10, and a smoke alarm 11.
[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0039] 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 fire door with smoke isolation function, comprising a door frame (1), characterized in that: The inner wall of the door frame (1) is movably connected with a fireproof door (2) through a pin shaft, the top, bottom, left side and right side of the fireproof door (2) are fixedly connected with water-swelling waterstop (3), the inner wall of the fireproof door (2) is fixedly connected with water pipe (4) used in cooperation with water-swelling waterstop (3), the front side of the fireproof door (2) is fixedly connected with a placing box (5), the bottom of the inner wall of the placing box (5) is fixedly connected with a water storage tank (6), the bottom of the inner wall of the placing box (5) and located at the bottom of the water storage tank (6) is fixedly connected with a small water pump (7), the input end of the small water pump (7) is communicated with a water inlet pipe (8), the top of the water inlet pipe (8) is communicated with the bottom of the water storage tank (6), the output end of the small water pump (7) is communicated with a water outlet pipe (9), the rear side of the water outlet pipe (9) penetrates through the placing box (5) and extends to the front side of the inner wall of the fireproof door (2), the rear side of the water outlet pipe (9) is communicated with the front side of the water pipe (4), the rear side of the inner wall of the placing box (5) is fixedly connected with a control terminal (10), the output end of the control terminal (10) is electrically connected with the input end of the small water pump (7), the front side and the rear side of the fireproof door (2) are fixedly connected with a smoke alarm (11), the output end of the smoke alarm (11) is electrically connected with the input end of the control terminal (10).
2. The fireproof door with smoke isolation function according to claim 1, characterized in that: The output end of the control terminal (10) is electrically connected with a 5G module (12), the rear side of the 5G module (12) is fixedly connected with the rear side of the inner wall of the placing box (5), the output end of the 5G module (12) is electrically connected with a signal transmitter (13), the right side of the signal transmitter (13) is fixedly connected with the left side of the placing box (5).
3. The fire door with smoke isolation function according to claim 1, characterized in that: The front side of the placing box (5) is provided with a heat dissipation hole (14), the shape of the heat dissipation hole (14) is strip-shaped.
4. The fire door with smoke isolation function according to claim 1, characterized in that: The front side and the rear side of the fireproof door (2) are fixedly connected with a handle (15), the shape of the handle (15) is U-shaped.
5. The fire door with smoke isolation function according to claim 4, characterized in that: The surface of the handle (15) is provided with anti-skid lines (16), the shape of the anti-skid lines (16) is rhombic.
6. The fire door with smoke isolation function according to claim 1, characterized in that: The rear side of the inner wall of the door frame (1) and located at the rear side of the fireproof door (2) is fixedly connected with a sealing strip (17), the material of the sealing strip (17) is rubber.
7. The fire door with smoke isolation function according to claim 1, characterized in that: The material of the placing box (5) is stainless steel, the shape of the placing box (5) is rectangular.
Citation Information
Patent Citations
Steel fire door
CN107905700B