Steel fireproof door
By setting up retractable fire needle felts on the outside of the steel fire door, the problem of fire doors being burned through in large-scale fires is solved, and the goal of increasing fire protection effects and providing escape time is achieved.
Patent Information
- Application Number
- CN202421688271.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-17
AI Technical Summary
Steel fire doors are easily burned through in large-scale fires, causing the fire to spread, increasing economic losses and safety risks.
A steel fireproof door is designed, equipped with backup safety protection devices, including retractable and retractable fire-proof needle felts, which increase fire and heat insulation by setting fire-proof needle felts on the outside of the door.
When the fire is too large, fire-proof needle felt can play a second fire-proof role, prevent the fire source from spreading, provide more escape time, and enhance public safety and personal safety guarantees.
Smart Images
Figure CN222894202U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field related to fire doors, and in particular relates to a steel fire door. Background Art
[0002] Steel fire doors are safety doors with high fire resistance. They play a vital role in various building scenarios, especially where strict fire prevention measures are required. Steel fire doors are mainly made of steel, especially cold-rolled steel plates or hot-rolled steel plates. These materials have excellent plasticity and toughness, corrosion resistance, wear resistance, and are not easy to deform. The door frame, door leaf frame and door leaf panel are all made of steel materials to ensure the overall strength and stability of the door. If filling materials are required in the door leaf, fireproof and heat-insulating materials that are non-toxic and harmless to the human body are usually selected, such as fireproof cotton or fireproof rock wool, to further improve its fire resistance.
[0003] However, although steel fire doors can play a role in fire prevention and fire prevention in case of fire, steel fire doors will block the fire to prevent the fire from spreading further, but the fire prevention effect of steel fire doors is also limited. When the fire is too large, the excessive fire will produce higher temperatures and stronger flames, so it will easily burn through the steel fire doors. Once the steel fire doors are burned through, the fire will spread further, which will increase the economic losses caused by the fire and endanger public safety and personal safety. Utility Model Content
[0004] The purpose of the utility model is to provide a steel fire door to solve the problem that the fire prevention effect of the steel fire door mentioned in the above background technology is also limited. When the fire is too large, the excessive fire will produce higher temperature and stronger flames, so it will easily burn through the steel fire door. Once the steel fire door is burned through, it will cause the fire to spread further.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel fireproof door, comprising a metal door frame and a door frame base arranged at the bottom of the metal door frame, the door frame base is fixedly connected to the metal door frame by welding, a fireproof steel door is arranged in the area between the metal door frame and the door frame base, the outer walls of the fireproof steel door and the metal door frame are sprayed with flame retardant and heat resistant paint, and a spare safety protection device is arranged at the front end of the top of the metal door frame;
[0006] The backup safety protection device includes a retractable shaft, a rectangular storage box, a fireproof needle felt, a floor strip and a rotatable baffle. The rectangular storage box is fixed to the front end of the top of the metal door frame by screws. The left and right ends of the center of the rectangular storage box are connected with a retractable shaft. The outside of the retractable shaft is wrapped with a fireproof needle felt. The fireproof needle felt is located inside the rectangular storage box. Rotatable baffles are provided at both ends of the left and right ends of the retractable shaft. The two rotatable baffles are respectively attached to the outer walls of the left and right ends of the rectangular storage box.
[0007] Preferably, the length of the rectangular storage box is greater than the width of the metal door frame, the length of the fireproof needle felt is greater than the height of the metal door frame, the bottom end of the rectangular storage box is opened, and a floor strip is fixed to the bottom end of the fireproof needle felt.
[0008] Preferably, a flame retardant and heat resistant frame is arranged inside the upper side of the center of the fireproof steel door, a transparent observation glass is fixed inside the flame retardant and heat resistant frame, and fireproof sealing treatment is adopted for the connection between the flame retardant and heat resistant frame and the fireproof steel door, and the connection between the flame retardant and heat resistant frame and the transparent observation glass.
[0009] Preferably, a handle installation reserved hole is arranged inside the right side of the center of the fireproof steel door, and a door lock installation reserved hole is arranged on the upper side of the handle installation reserved hole.
[0010] Preferably, the left end of the fireproof steel door is rotatably connected to the metal door frame via a plurality of hinges, and the fireproof steel door can be rotated by the hinges to an angle greater than ninety degrees.
[0011] Preferably, a metal sealing sheet is provided at the right end of the fireproof steel door, and the metal sealing sheet is welded to the front end outer wall of the fireproof steel door. After the fireproof steel door is completely closed into the metal door frame, the metal sealing sheet can be completely attached to the front end outer wall of the connection between the fireproof steel door and the right end of the metal door frame.
[0012] Compared with the prior art, the utility model provides a steel fire door, which has the following beneficial effects:
[0013] The utility model adds a novel spare safety protection device to the front end of the top of the metal door frame of the steel fireproof door. When not in use, the spare safety protection device will be completely stored and fixed at the front end of the top of the metal door frame, so it will not hinder the normal opening and closing operation of the fireproof steel door inside the metal door frame, nor will it hinder people from passing through the metal door frame area normally. When a fire occurs, if the fire is large, the firefighters can completely release the fireproof needle felt stored in the rectangular storage box of the device, and the completely released fireproof needle felt Affixed to the outside of the front end of the metal door frame, the fireproof needle felt can completely seal the steel fire door, which can increase the fireproof and heat-insulating effects of the steel fire door. When the fire is too large and burns through the fireproof steel door, the fireproof needle felt protecting the outside of the steel fire door can play a second fireproof role to prevent the fire source from continuing to spread outward through the steel fire door, which can provide time for fire extinguishing and personnel escape. When it comes to life safety, one more protection can provide time guarantee for escape, which can save more lives. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model is a front view of a three-dimensional structure of a steel fire door.
[0015] Figure 2 The utility model is a front view planar structural schematic diagram of a steel fire door.
[0016] Figure 3 It is a schematic diagram of the internal planar structure of the backup safety protection device of the utility model.
[0017] In the figure: 1. Door frame base; 2. Metal door frame; 3. Fireproof steel door; 4. Metal sealing sheet; 5. Reserved hole for handle installation; 6. Reserved hole for door lock installation; 7. Flame retardant and heat-resistant frame; 8. Transparent observation glass; 9. Spare safety protection device; 10. Retractable shaft; 11. Rectangular storage box; 12. Fireproof needle-punched felt; 13. Floor strip; 14. Rotatable baffle. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] The utility model provides Figure 1-3A steel fire door shown in the figure comprises a metal door frame 2 and a door frame base 1 arranged at the bottom of the metal door frame 2, the door frame base 1 is fixedly connected to the metal door frame 2 by welding, a fireproof steel door 3 is arranged in the area between the metal door frame 2 and the door frame base 1, the outer walls of the fireproof steel door 3 and the metal door frame 2 are sprayed with flame-retardant and heat-resistant paint, a flame-retardant and heat-resistant frame 7 is arranged inside the upper side of the center of the fireproof steel door 3, a transparent observation glass 8 is fixed inside the flame-retardant and heat-resistant frame 7, the connection between the flame-retardant and heat-resistant frame 7 and the fireproof steel door 3 and the connection between the flame-retardant and heat-resistant frame 7 and the transparent observation glass 8 are both fire-proof sealed, a handle installation reserved hole 5 is arranged inside the right side of the center of the fireproof steel door 3, a door lock installation reserved hole 6 is arranged on the upper side of the handle installation reserved hole 5, the left end of the fireproof steel door 3 is rotatably connected to the metal door frame 2 by multiple hinges, the fireproof steel door 3 can rotate at an angle greater than ninety degrees through the hinge, a metal sealing sheet 4 is arranged on the right end of the fireproof steel door 3, and the metal sealing sheet 4 is welded on the front end outer wall of the fireproof steel door 3. After the fireproof steel door 3 is completely closed inside the metal door frame 2, the metal sealing sheet 4 can be completely attached to the front end outer wall of the connection between the fireproof steel door 3 and the right end of the metal door frame 2. When installing and using the steel fireproof door, the metal door frame 2 needs to be installed in the reserved installation door hole first. After the metal door frame 2 is installed, the fireproof steel door 3 needs to be placed inside the metal door frame 2, and then the fireproof steel door 3 is installed in the metal door frame 2 using multiple hinges, so that the fireproof steel door 3 can be rotated in the metal door frame 2 to open and close through the hinges. Then, the door lock and the switch handle need to be installed in the door lock installation reserved hole 6 and the handle installation reserved opening on the fireproof steel door 3 respectively. Then, the fireproof steel door 3 can be normally rotated to open and close through the switch handle. After the fireproof steel door 3 is completely closed inside the metal door frame 2, the fireproof steel door 3 can be directly locked through the door lock to increase the fire resistance and fire prevention effect of the fireproof steel door 3.
[0020] like Figure 1 , Figure 2 and Figure 3As shown, a spare safety protection device 9 is provided at the top front end of the metal door frame 2, and the spare safety protection device 9 includes a retractable shaft 10, a rectangular storage box 11, a fireproof needle felt 12, a floor strip 13 and a rotatable baffle 14. The rectangular storage box 11 is fixed to the top front end of the metal door frame 2 by screws, and the left and right ends of the center of the rectangular storage box 11 are connected to the retractable shaft 10, and the fireproof needle felt 12 is wound around the outside of the retractable shaft 10. The fireproof needle felt 12 is located inside the rectangular storage box 11, and the left and right ends of the retractable shaft 10 are connected to the left and right ends of the retractable shaft 10. Rotatable baffles 14 are provided at both ends, and the two rotatable baffles 14 are respectively attached to the outer walls of the left and right ends of the rectangular storage box 11. The length of the rectangular storage box 11 is greater than the width of the metal door frame 2, and the length of the fireproof needle felt 12 is greater than the height of the metal door frame 2. The bottom end of the rectangular storage box 11 is opened, and a ground strip 13 is fixed to the bottom end of the fireproof needle felt 12. When a fire occurs, if the fire is too large and difficult to control, if the steel fire door is used alone for fire prevention, the effect is small, and a strong fire source will It is easy to burn through the steel fire door and cause the fire to spread further. In order to provide more escape time, it is necessary to use the backup safety protection device 9 to play a secondary fire protection role outside the steel fire door to slow down the fire spread time. When using the backup safety protection device 9, you first need to grab the ground strip 13 at the bottom of the fireproof needle felt 12, and then pull it down hard. In this way, the fireproof needle felt 12 wrapped around the outside of the retractable shaft 10 will be pulled downward through the ground strip 13. When the fireproof needle felt 12 is completely pulled out After coming out, the top of the fireproof needle felt 12 is fixed to the retractable shaft 10, and at this time, it is only necessary to cover the outside of the closed steel fire door with the fireproof needle felt 12, and then place the floor strip 13 on the ground, so that the fireproof needle felt 12 will cover the steel fire door to further increase the fireproof effect of the steel fire door, so as to prevent the fire from burning through the steel fire door and spreading outward, and the fireproof needle felt 12 can resist the spreading flame and buy time for escape, which can also increase the fireproof effect of the steel fire door.
[0021] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A steel fireproof door, comprising a metal door frame (2) and a door frame base (1) arranged at the bottom of the metal door frame (2), wherein the door frame base (1) is fixedly connected to the metal door frame (2) by welding, a fireproof steel door (3) is arranged in the area between the metal door frame (2) and the door frame base (1), and the outer walls of the fireproof steel door (3) and the metal door frame (2) are sprayed with flame retardant and heat resistant paint, characterized in that: A backup safety protection device (9) is provided at the top front end of the metal door frame (2); The backup safety protection device (9) comprises a retractable shaft (10), a rectangular storage box (11), a fireproof needle felt (12), a floor strip (13) and a rotatable baffle (14); the rectangular storage box (11) is fixed to the front end of the top of the metal door frame (2) by screws; the left and right ends of the center of the rectangular storage box (11) are connected with the retractable shaft (10); the outside of the retractable shaft (10) is wrapped with a fireproof needle felt (12); the fireproof needle felt (12) is located inside the rectangular storage box (11); the left and right ends of the retractable shaft (10) are both provided with rotatable baffles (14); the two rotatable baffles (14) are respectively attached to the left and right outer walls of the rectangular storage box (11).
2. A steel fire door according to claim 1, characterized in that: The length of the rectangular storage box (11) is greater than the width of the metal door frame (2), the length of the fireproof needle felt (12) is greater than the height of the metal door frame (2), the bottom end of the rectangular storage box (11) is open, and a floor strip (13) is fixed to the bottom end of the fireproof needle felt (12).
3. A steel fire door according to claim 1, characterized in that: A flame retardant and heat resistant frame (7) is arranged inside the upper side of the center of the fireproof steel door (3), and a transparent observation glass (8) is fixed inside the flame retardant and heat resistant frame (7). The connection between the flame retardant and heat resistant frame (7) and the fireproof steel door (3) and the connection between the flame retardant and heat resistant frame (7) and the transparent observation glass (8) are both fireproof sealed.
4. A steel fire door according to claim 1, characterized in that: A handle installation reserved hole (5) is arranged inside the right side of the center of the fireproof steel door (3), and a door lock installation reserved hole (6) is arranged on the upper side of the handle installation reserved hole (5).
5. A steel fire door according to claim 1, characterized in that: The left end of the fireproof steel door (3) is rotatably connected to the metal door frame (2) via a plurality of hinges, and the fireproof steel door (3) can be rotated to an angle greater than ninety degrees via the hinges.
6. A steel fire door according to claim 1, characterized in that: The right end of the fireproof steel door (3) is provided with a metal sealing sheet (4), and the metal sealing sheet (4) is welded to the front end outer wall of the fireproof steel door (3). After the fireproof steel door (3) is completely closed into the metal door frame (2), the metal sealing sheet (4) can be completely attached to the front end outer wall of the connection between the fireproof steel door (3) and the right end of the metal door frame (2).