Steel fireproof door capable of preventing smoke diffusion
By designing gears and rack mechanisms on steel fire doors to drive the sealing plate movement and sealing the gaps in the door body, the problem of incomplete diffusion of smoke from the existing fire doors is solved, and more efficient smoke blocking and a safer escape environment are achieved. At the same time, the fire retardant and thermal insulation layer are used to improve fire and thermal insulation performance.
Patent Information
- Application Number
- CN202421464692.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-25
AI Technical Summary
During fire, the existing steel fire doors are not spread thoroughly due to the gap between the upper and lower sides and the door frame, which poses safety hazards.
A steel fireproof door that prevents smoke from spreading is designed. The sealing plate is driven up and down through gears and rack mechanisms to block the gaps at the upper and lower ends of the door body and prevent the smoke from spreading. The door body surface is equipped with a flame retardant layer and a heat insulation layer to enhance fire and heat insulation.
Effectively sealing the smoke diffusion route, improving the blocking effect of fire doors on smoke, enhancing the escape safety of personnel in the building, and improving the fire and heat insulation performance through the use of flame retardant and heat insulation layer.
Smart Images
Figure CN222823136U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fireproof doors, in particular to a steel fireproof door capable of preventing smoke from spreading. Background Art
[0002] When a fire occurs in a building, the objects in the building will cause a lot of smoke to spread after burning. The dust and harmful substances mixed in the smoke are the main causes of harm to personnel and hinder their escape. In order to block the smoke, personnel usually block the smoke by closing the steel fire door. However, there are gaps between the upper and lower sides of some steel fire doors and the door frame, which will affect the door's blocking effect on the spread of smoke and pose a safety hazard. Utility Model Content
[0003] The utility model aims to solve the defect in the prior art that the diffusion of smoke mixed with dust and harmful substances will affect the escape of personnel, and proposes a steel fire door that prevents the diffusion of smoke.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A steel fire door to prevent smoke diffusion is designed, comprising a door body, a accommodating cavity is opened inside the door body, a fire extinguishing mechanism is arranged inside the accommodating cavity, a movable cavity is opened inside the door body, a pair of gears are rotatably installed inside the movable cavity, a first rack is meshed on the side of the gears away from each other, a first support rod is fixedly connected to the end of the first rack, blocking plates are movably arranged inside the upper and lower ends of the door body, the end of the first support rod passes through the door body and is fixedly connected to the blocking plate on one side, a fixing rod is slidably arranged inside the movable cavity, a second rack is fixedly installed on both ends of the fixing rod, the second rack is meshed with the gear, a second telescopic rod is fixedly installed on the upper end of the fixing rod, the second telescopic rod is fixedly installed in the door body, a second support rod is fixedly installed on the end of the end of the second rack away from the fixing rod, and the end of the second support rod is fixedly connected to the blocking plate on the other side.
[0006] Preferably, the length directions of the first rack and the second rack are parallel.
[0007] Preferably, a sealing gasket is fixedly mounted on the surface of the blocking plate.
[0008] Preferably, the fire extinguishing mechanism includes a sealing plate, which is rotatably connected to the inner wall of the accommodating chamber, a first telescopic rod is fixedly installed on the top of the accommodating chamber, a connecting rod is fixedly installed on the end of the first telescopic rod, at least two pairs of linkage rods are rotatably connected to the surface of the connecting rod, the end of the linkage rod is rotatably connected to the sealing plate, and a spray pipe is fixedly installed on the inner surface of the sealing plate.
[0009] Preferably, the length direction of the first telescopic rod and the length direction of the second telescopic rod are both arranged vertically.
[0010] Preferably, the plane where each pair of linkage rods are located is perpendicular to the surface of the sealing plate.
[0011] Preferably, the door body comprises a steel plate, a flame retardant layer is fixedly installed on the outer surface of the steel plate, and a heat insulation layer is fixedly installed inside the steel plate.
[0012] The utility model proposes a smoke-diffusion-proof steel fire door, which has the beneficial effect that: during use, the smoke-diffusion-proof steel fire door can drive the fixing rod to move downward through the second telescopic rod, and the fixing rod can drive the lower blocking plate to move downward through the second rack and the second support rod, and the second rack can drive the first rack to move through the gear, and the first rack can drive the upper blocking plate to move upward through the first support rod, and the gaps at the upper and lower ends of the door body can be blocked by the blocking plates on the upper and lower sides, so that smoke can be prevented from diffusing through the door body, and the flame-retardant layer can play a good flame-retardant and fire-proof role, the glass fiber reinforced polyurethane composite material is difficult to burn when encountering fire, and the high temperature of the fire surface is difficult to be transmitted to the other side, and the heat insulation layer has a good heat insulation effect, which can help people escape. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic cross-sectional structure diagram of a steel fire door for preventing smoke diffusion proposed by the utility model;
[0014] Figure 2 This is a schematic diagram of the longitudinal cross-sectional structure of a fire extinguishing mechanism in a steel fire door that prevents smoke diffusion proposed by the utility model;
[0015] Figure 3 This is a structural schematic diagram of a steel fire door for preventing smoke diffusion proposed by the utility model, in which the sealing plate is opened;
[0016] Figure 4 This is a schematic diagram of the transverse cross-sectional structure of a fire extinguishing mechanism in a steel fire door that prevents smoke diffusion proposed by the utility model;
[0017] Figure 5 The utility model is a schematic diagram of the structure of the interior of a steel fire door for preventing smoke diffusion.
[0018] In the figure: 1. door body; 2. accommodating cavity; 3. sealing plate; 4. first telescopic rod; 5. connecting rod; 6. linkage rod; 7. spray pipe; 8. blocking plate; 9. movable cavity; 10. first support rod; 11. first rack; 12. gear; 13. second rack; 14. fixed rod; 15. second telescopic rod; 16. second support rod; 17. flame retardant layer; 18. steel plate; 19. heat insulation layer. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0020] Example 1: Reference Figure 1-3 and Figure 5 A steel fire door for preventing smoke diffusion comprises a door body 1, a receiving chamber 2 is provided inside the door body 1, a fire extinguishing mechanism is provided inside the receiving chamber 2, and the fire extinguishing mechanism can extinguish fire. A movable chamber 9 is provided inside the door body 1, a pair of gears 12 are rotatably installed inside the movable chamber 9, a first rack 11 is meshed on the side of the gears 12 away from each other, a first support rod 10 is fixedly connected to the end of the first rack 11, a blocking plate 8 is movably provided inside the upper and lower ends of the door body 1, the end of the first support rod 10 passes through the door body 1 and is fixedly connected to the blocking plate 8 on one side, a fixed rod 14 is slidably provided inside the movable chamber 9, a second rack 13 is fixedly installed on both ends of the fixed rod 14, the second rack 13 is meshed and connected to the gear 12, the length direction of the first rack 11 and the second rack 13 are parallel, a second telescopic rod 15 is fixedly installed on the upper end of the fixed rod 14, the second telescopic rod 15 is fixedly installed inside the door body 1, a smoke sensor is provided outside the door body 1, and when the smoke sensor senses that the smoke is triggered, the power supply connected to the second telescopic rod 15 is turned on. The second telescopic rod 15 can drive the fixed rod 14 to move up and down, and the up and down movement of the fixed rod 14 can drive the second rack 13 to move up and down, and the end of the second rack 13 away from the end of the fixed rod 14 is fixedly installed with a second support rod 16, and the end of the second support rod 16 is fixedly connected to the other side blocking plate 8, and the up and down movement of the second rack 13 can drive the second support rod 16 to move, and the movement of the second support rod 16 can drive the blocking plate 8 to move, and the movement of the second rack 13 will also drive the gear 12 to rotate, and the rotation of the gear 12 will drive the first rack 11 to move, and the movement of the first rack 11 will drive the blocking plate 8 to move through the first support rod 10, and by driving the blocking plate 8 to move, the upper and lower ends of the door body 1 can be effectively blocked, and the smoke can be prevented from diffusing through the gaps at the upper and lower ends of the door body 1.
[0021] A sealing gasket is fixedly installed on the surface of the blocking plate 8, and the sealing gasket can improve the tightness of the contact between the blocking plate 8 and the door frame, thereby improving the sealing performance of the blockage and effectively preventing the spread of smoke. The door body 1 includes a steel plate 18, and a flame retardant layer 17 is fixedly installed on the outer surface of the steel plate 18, and a heat insulation layer 19 is fixedly installed inside. The flame retardant layer 17 is a flame retardant and fireproof material in the prior art, and can also be a flame retardant coating, which can play a good flame retardant and fireproof role. The inside of the heat insulation layer 19 is made of a glass fiber reinforced polyurethane structure. The glass fiber reinforced polyurethane material is a thermosetting material. After encountering fire, a carbonized layer will be formed on the surface to prevent the flame from penetrating, and it will not melt or produce droplets. The glass fiber reinforced polyurethane composite material is difficult to burn when encountering fire, and the high temperature of the fire surface is difficult to conduct to the other side. Therefore, the heat insulation layer 19 has a good heat insulation effect.
[0022] Working principle: During the use of the steel fire door that prevents smoke diffusion, smoke triggers the smoke sensor, and the second telescopic rod 15 is powered on to drive the fixed rod 14 to move downward. The movement of the fixed rod 14 drives the second rack 13 to move, and the second rack 13 can drive the lower blocking plate 8 to move downward through the second support rod 16. The movement of the second rack 13 will drive the gear 12 to rotate, and the rotation of the gear 12 can drive the first rack 11 to move. The first rack can drive the upper blocking plate 8 to move upward through the first support rod 10, and the gap between the upper and lower ends of the door body 1 and the door frame is blocked by the blocking plate 8, which can prevent smoke from spreading through the door body 1. The flame retardant layer 17 can play a good flame retardant and fireproof role. The glass fiber reinforced polyurethane composite material is difficult to burn when it encounters fire, and the high temperature of the fire surface is difficult to be transmitted to the other side. The heat insulation layer 19 has a good heat insulation effect, which can help people escape.
[0023] Embodiment 2: In the above embodiment, if the door needs to be opened for ventilation under special circumstances, the fire cannot be blocked, so this embodiment is proposed. Figure 1-4When the fire extinguisher 2 is in the state of being lifted up, the fire extinguisher 2 of this embodiment of the present invention is provided with a fire extinguishing mechanism, and the fire extinguishing mechanism 2 ... When the sealing plate 3 is opened, the external flames can be sprayed through the spray pipe 7, which can reduce the tendency of fire spreading to a certain extent. When the sealing plate 3 is closed, the fire door is in a fully closed state, which can prevent smoke from spreading outward through the door body. According to special needs, the sealing plate 3 can be opened for ventilation, and the tendency of fire spreading can be reduced through the spray pipe 7, allowing firefighters to observe the fire situation on the other side of the door body.
[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A steel fire door for preventing smoke diffusion, comprising a door body (1), characterized in that: The door body (1) is provided with a receiving chamber (2) inside, a fire extinguishing mechanism is provided inside the receiving chamber (2), a movable chamber (9) is provided inside the door body (1), a pair of gears (12) are rotatably mounted inside the movable chamber (9), the gears (12) are meshed with first racks (11) on the sides away from each other, the ends of the first racks (11) are fixedly connected to first support rods (10), and blocking plates (8) are movably provided inside the upper and lower ends of the door body (1), the ends of the first support rods (10) penetrate the door body (1) and are fixedly connected to the blocking plate (8) on one side. A fixed rod (14) is slidably provided inside the movable cavity (9), and second racks (13) are fixedly installed at both ends of the fixed rod (14), and the second rack (13) is meshingly connected with the gear (12), and a second telescopic rod (15) is fixedly installed on the upper end of the fixed rod (14), and the second telescopic rod (15) is fixedly installed in the door body (1), and a second support rod (16) is fixedly installed at the end of the second rack (13) away from the end of the fixed rod (14), and the end of the second support rod (16) is fixedly connected to the blocking plate (8) on the other side.
2. The smoke diffusion-proof steel fire door according to claim 1, characterized in that: The length directions of the first rack (11) and the second rack (13) are parallel.
3. The smoke diffusion-proof steel fire door according to claim 1, characterized in that: A sealing gasket is fixedly mounted on the surface of the blocking plate (8).
4. The smoke diffusion-proof steel fire door according to claim 1, characterized in that: The fire extinguishing mechanism comprises a sealing plate (3), the sealing plate (3) is rotatably connected to the inner wall of the accommodating chamber (2), a first telescopic rod (4) is fixedly installed on the top of the accommodating chamber (2), a connecting rod (5) is fixedly installed on the end of the first telescopic rod (4), at least two pairs of linkage rods (6) are rotatably connected to the surface of the connecting rod (5), the end of the linkage rod (6) is rotatably connected to the sealing plate (3), and a spray pipe (7) is fixedly installed on the inner surface of the sealing plate (3).
5. The smoke diffusion-proof steel fire door according to claim 4, characterized in that: The length direction of the first telescopic rod (4) and the length direction of the second telescopic rod (15) are both arranged vertically.
6. The smoke diffusion-proof steel fire door according to claim 5, characterized in that: The plane on which each pair of linkage rods (6) is located is perpendicular to the surface of the sealing plate (3).
7. The smoke diffusion-proof steel fire door according to claim 1, characterized in that: The door body (1) comprises a steel plate (18), a flame retardant layer (17) being fixedly mounted on the outer surface of the steel plate (18), and a heat insulation layer (19) being fixedly mounted on the inside.