Smoke and fireproof doors with concealed ventilation structure

Abstract

This utility model relates to a smoke and fireproof door with a concealed ventilation structure. It features a door frame, door body, handle, mounting bracket, connecting pipes, and smoke filter plates. The door frame is installed within the wall, and the door body is rotatably connected to the door frame. A handle is installed inside the door body, and a mounting bracket is connected inside the door body. Several connecting pipes are rotatably connected to the upper and lower ends of the mounting bracket. Spherical splines are slidably connected to the connecting pipes, and springs are installed inside the connecting pipes. Several smoke filter plates are rotatably connected to the middle of the mounting bracket. Both the top and bottom ends of the smoke filter plates have mating grooves, and the smoke filter plates engage with the spherical splines through these grooves. The advantage is that the through-hole structure of the door frame and the detachable connection of the concealed plates allow the mounting bracket to be integrated inside the door frame. This achieves daily ventilation while maintaining a smooth door appearance. The concealed plates cover the through-holes, preventing exposed vents from disrupting the building's interior style, ultimately achieving a balance between concealed ventilation and aesthetics.

Description

Technical Field

[0001] This utility model relates to the field of building fire safety equipment, and in particular to a smoke and fireproof door with a concealed ventilation structure. Background Technology

[0002] As a fundamental component in buildings for separating spaces and controlling access, the function of doors has continuously evolved with the upgrading of safety requirements. Fire doors are a type of door with special fire-resistant properties. They are usually made of non-combustible or flame-retardant materials and can effectively prevent the spread of fire and smoke in the event of a fire through their fire resistance stability, integrity, and heat insulation. This buys critical time for personnel evacuation and fire rescue, making them a core component of modern building fire compartmentation systems.

[0003] However, existing fire doors suffer from a lack of functionality in practical use. Because their design focuses on airtight protection in extreme fire scenarios, the door structure is typically fully enclosed, lacking ventilation capabilities for everyday use. When fire doors are used as ordinary doors for extended periods, users cannot achieve natural ventilation through the door, leading to a decline in indoor air quality. Forcibly adding ventilation holes or devices to the door would compromise the overall structural integrity of the fire door, reduce its fire resistance, and even violate fire safety regulations.

[0004] In existing technologies, most fire doors with ventilation functions use exposed vents or mechanical ventilation structures. However, exposed vents disrupt the smoothness of the door surface, making it difficult to coordinate with modern architectural interior styles and affecting the overall aesthetics. Mechanical ventilation components are prone to dust accumulation and are difficult to maintain. After long-term use, the sealing may fail due to component aging. Exposed ventilation structures can easily become weak points for fire or smoke to penetrate, thus weakening the core protective function of the fire door. Utility Model Content

[0005] The technical problem this invention aims to solve is the inability to simultaneously achieve ventilation and fire prevention. It provides a smoke and fireproof door with a concealed ventilation structure, thereby addressing the aforementioned issues.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a smoke and fireproof door with a concealed ventilation structure, including a door frame, a door body, a handle, a mounting bracket, a concealed plate, a connecting pipe, a smoke filter plate, a spherical spline, a spring, and an opening and closing assembly. The door frame is installed in the wall, and the door body is rotatably connected to the door frame. A handle is installed in the door body, and a through hole is opened at the handle position on the door frame. Removable concealed plates are connected to the front and rear sides of the through hole on the door frame. A mounting bracket is connected to the door body, and several connecting pipes are rotatably connected to the upper and lower ends of the mounting bracket. A spherical spline is slidably connected to one end of the connecting pipe facing the middle. A spring is installed in the connecting pipe, with one end of the spring connected to the spherical spline and the other end connected to the connecting pipe. Several smoke filter plates are rotatably connected in the middle of the mounting bracket. Both the top and bottom ends of the smoke filter plates have mating grooves, and the smoke filter plates are engaged with the spherical spline through the mating grooves. An opening and closing assembly for driving the smoke filter plates to rotate is provided on the top of the mounting bracket.

[0007] A further preferred embodiment of this utility model is as follows: the opening and closing assembly includes a gear ring, a rack, and a cylinder. The cylinder is mounted on the top of the mounting bracket, the gear ring is sleeved on the connecting pipe, the rack is slidably connected to the top of the mounting bracket, the rack is connected to the piston rod of the cylinder, and the rack meshes with the gear ring.

[0008] A further preferred embodiment of this utility model is: it also includes a filter screen, and the filter screen is installed in the ventilation gap between the mounting bracket and the door.

[0009] A further preferred embodiment of this utility model is: it also includes a soft pad, and the inside of the handle is connected to the soft pad.

[0010] A further preferred embodiment of this utility model is: it also includes a hole plug, and the circular hole generated by the fixed hidden plate is provided with a hole plug.

[0011] A further preferred embodiment of this utility model is: it also includes a smoke detector, which is installed on the door and penetrates through the door.

[0012] A further preferred embodiment of this utility model is: it also includes an alarm, which is installed on the handle and is wiredly connected to the smoke detector.

[0013] A further preferred embodiment of this utility model is: it also includes a sealing strip, with the sealing strip connected to the middle of the inner ring of the door frame, and the outer ring of the door being pressed together with the sealing strip.

[0014] Compared with the prior art, the advantages of this utility model are: by using the through-hole structure of the door frame and the detachable cooperation of the hidden plate, the mounting bracket is integrated into the door frame, thereby achieving daily ventilation while maintaining the flat appearance of the door. The hidden plate covers the through-hole, avoiding exposed vents from damaging the interior style of the building, and ultimately achieving the goal of concealed ventilation and aesthetics. By driving the connecting pipe and the ball spline to rotate through the opening and closing components, the smoke filter plate unfolds to form a ventilation gap in the normal state, and rotates 90 degrees to fit together to form a closed barrier to block the spread of smoke, thereby achieving the integrated function of ventilation, sealing and smoke filtration, and ultimately achieving the dual protection of daily ventilation and fire smoke prevention. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural cross-sectional view of the door frame of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure of the mounting bracket, ball spline, and spring of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the cylinder, gear ring, and rack of this utility model.

[0020] In the diagram: 1. Door frame, 2. Door body, 21. Handle, 3. Mounting bracket, 31. Hidden plate, 32. Connecting pipe, 4. Smoke filter plate, 41. Docking groove, 5. Spherical spline, 6. Spring, 7. Gear ring, 8. Rack, 9. Cylinder, 10. Filter screen, 11. Pad, 12. Hole plug, 13. Smoke detector, 14. Alarm, 15. Sealing strip. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0022] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0023] This embodiment mainly describes the structure of the fire door, as follows:

[0024] Smoke and fire doors with concealed ventilation structures, such as Figures 1-4 As shown, the device includes a door frame 1, a door body 2, a handle 21, a mounting bracket 3, a concealed plate 31, a connecting pipe 32, a smoke filter plate 4, a spherical spline 5, a spring 6, and an opening and closing assembly. The door frame 1 is installed inside the wall, and the door body 2 is rotatably connected to the door frame 1. The handle 21 is installed inside the door body 2. The handle 21 is a bent vertical plate. The door frame 1 has a through hole at the handle 21. The front and rear sides of the through hole in the door frame 1 are connected to the detachable concealed plate 31. The mounting bracket 3 is connected inside the door body 2. Several connecting pipes 32 are rotatably connected to the upper and lower ends of the mounting bracket 3. The spherical spline 5 is slidably connected to one end of the connecting pipe 32 facing the middle. The spherical spline 5 has protrusions embedded in the connecting pipes 32 on both the left and right sides, thereby restricting the spherical spline 5. It can only slide within the connecting tube 32. A spring 6 is installed inside the connecting tube 32. One end of the spring 6 is connected to the spherical spline 5, and the other end is connected inside the connecting tube 32. Several smoke filter plates 4 are rotatably connected in the middle of the mounting frame 3. When the smoke filter plate 4 is closed, it forms a closed barrier to block smoke. When it is unfolded, it allows airflow to pass through. The smoking material can absorb smoke and ensure the breathability of the residual airflow. Both the top and bottom ends of the smoke filter plate 4 have docking grooves 41. The smoke filter plate 4 is engaged with the spherical spline 5 through the docking grooves 41. The spherical spline 5 is slidably adapted to the smoke filter plate 4 for disassembly and assembly. The spring 6 provides an automatic reset function to ensure the reliability of force transmission when the smoke filter plate 4 rotates. The top of the mounting frame 3 is equipped with an opening and closing component to drive the rotation of the smoke filter plate 4.

[0025] like Figure 2 and Figure 4 As shown, the opening and closing assembly includes a gear ring 7, a rack 8, and a cylinder 9. The cylinder 9 is mounted on the top of the mounting bracket 3, the gear ring 7 is fitted on the connecting pipe 32, the rack 8 is slidably connected to the top of the mounting bracket 3, the rack 8 is connected to the piston rod of the cylinder 9, the rack 8 meshes with the gear ring 7, the cylinder 9 provides precise power, and the transmission of the rack 8 and the gear ring 7 ensures that the rotation angle of the filter plate 4 is controllable, realizing rapid sealing and opening.

[0026] like Figure 2 As shown, it also includes a filter screen 10. A filter screen 10 is installed in the ventilation gap between the mounting bracket 3 and the door 2 to block mosquitoes and other foreign objects from entering the mounting bracket 3, prevent the smoke filter plate 4 from being blocked and unable to rotate, and ensure the stability of daily ventilation function.

[0027] like Figure 2As shown, it also includes a soft pad 11, which is connected to the inside of the handle 21 to provide flexible contact and improve the comfort of holding the handle 21.

[0028] like Figure 1 As shown, it also includes a hole plug 12. The hole plug 12 is provided in the round hole generated by the fixed hidden plate 31 to eliminate the fine holes on the surface of the door body 2 and further enhance the overall aesthetics.

[0029] like Figure 2 As shown, it also includes a smoke detector 13. The smoke detector 13 is installed on the door body 2. The smoke detector 13 penetrates the door body 2, accurately detects the fire, and provides data support for the alarm 14 to be activated and the control center to respond, so as to realize early fire warning.

[0030] like Figure 1 As shown, it also includes an alarm 14, which is installed on the handle 21. The alarm 14 is wired to the smoke detector 13. Through the wired connection, it can simultaneously receive signals from the smoke detector 13 and transmit data to the control center. The audible and visual alarms directly alert people near the door 2, and at the same time send location information to the control center to help quickly locate the fire area and improve emergency response efficiency.

[0031] like Figure 1 and Figure 2 As shown, it also includes a sealing strip 15. The sealing strip 15 is connected to the middle of the inner ring of the door frame 1, and the outer ring of the door body 2 is pressed and fitted with the sealing strip 15 to enhance the sealing performance of the door body 2 when closed.

[0032] During normal use, the door 2 is in the closed state. At this time, the bent structure of the handle 21 forms a guide channel: external airflow can bypass the bent part of the handle 21 and enter the mounting frame 3, and diffuse to the other side along the gap between the smoke filter plates 4, and finally flow out from the vent on the other side of the mounting frame 3, realizing the natural exchange of air inside and outside the door 2. During this process, the smoke filter plates 4 are in the unfolded state, and their gaps allow airflow to pass through. At the same time, the filter screen 10 can block foreign objects such as mosquitoes from entering the interior of the mounting frame 3, preventing the smoke filter plates 4 from being affected by foreign objects blocking their rotation.

[0033] When a fire occurs, all fire doors in the building automatically enter emergency mode. The control system prioritizes the activation of cylinder 9, whose piston rod extends outward, pushing the connected rack 8 to slide along the top of the mounting bracket 3. As the rack 8 moves, it engages with the gear ring 7 sleeved on the connecting pipe 32, causing the gear ring 7 and the connecting pipe 32 to rotate synchronously. During the rotation of the connecting pipe 32, the spherical spline 5, which is slidably connected inside, can only slide along the axial direction of the connecting pipe 32 due to the restriction of the protrusions on both sides, and cannot rotate. Thus, through the engagement of the spherical spline 5 with the mating grooves 41 at the top and bottom ends of the smoke filter plate 4, the smoke filter plate 4 is driven to rotate synchronously. When all the smoke filter plates 4 have rotated 90 degrees, their surfaces fit together to form a closed barrier, completely blocking the airflow channel; at the same time, the smoke-absorbing material filled inside the smoke filter plate 4 can absorb the passing smoke, similar to the filtering function of a gas mask, ensuring that the residual airflow is still available for people to breathe.

[0034] In response to a fire at individual door 2, when the smoke detector 13 detects that the smoke concentration exceeds the standard, it immediately activates the power supply to the alarm 14. After the alarm 14 is activated, it sends an alarm to personnel in the vicinity and rear of door 2 through audible and visual signals, indicating the direction of fire spread; at the same time, the alarm 14 sends a location marker signal to the control center, allowing central control personnel to quickly locate the fire area through the system interface, providing a basis for subsequent firefighting and evacuation command.

[0035] After the fire is extinguished, the control center resets the status of all doors 2 via remote command: First, the alarm 14 is turned off to stop the alarm. Then, the piston rod of the control cylinder 9 retracts in the opposite direction, pulling the rack 8 to slide in the opposite direction. The gear ring 7 and the connecting pipe 32 rotate in the opposite direction, causing the smoke filter plate 4 to unfold back to its initial position, expanding the ventilation gap to accelerate the air exchange between the inside and outside of the door 2 and expel residual smoke. At this time, the smoke filter plate 4 that has absorbed smoke needs to be replaced: The operator first removes the hole plug 12 of the fixed hidden plate 31, removes the hidden plate 31 to expose the inside of the mounting bracket 3, and then pulls out the old smoke filter plate 4. During the pulling process, the mating grooves 41 at the top and bottom ends of the smoke filter plate 4 squeeze the spherical spline 5, pushes the spherical spline 5 to slide into the connecting pipe 32 and compresses the spring 6; after the old smoke filter plate 4 is completely removed, the spring 6 releases its elastic potential energy, pushing the spherical spline 5 to reset in the connecting pipe 32. When the new smoke filter plate 4 is pushed into the mounting bracket 3, the mating grooves 41 at both ends of the plate press against the spherical spline 5 again. After the mating grooves 41 and the spherical spline 5 are axially aligned, the spring 6 pushes the spherical spline 5 into the mating grooves 41, thus fixing the new smoke filter plate 4. Finally, the hidden plate 31 is reinstalled and the hole plug 12 is inserted to restore the appearance integrity of the door 2.

[0036] In daily use, the soft pad 11 on the inside of the handle 21 provides a flexible contact and improves grip comfort; the filter 10 continuously blocks foreign objects from entering the mounting bracket 3, preventing the smoke filter plate 4 from being unable to rotate properly due to foreign objects blocking it, and ensuring the reliability of ventilation and emergency functions.

[0037] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] The smoke and fireproof door with a concealed ventilation structure provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A smoke-proof and fire-proof door with a concealed ventilation structure, characterized in that: The system includes a door frame (1), a door body (2), a handle (21), a mounting bracket (3), a concealed plate (31), a connecting pipe (32), a smoke filter plate (4), a spherical spline (5), a spring (6), and an opening and closing assembly. The door frame (1) is installed inside the wall, and the door body (2) is rotatably connected to the door frame (1). The handle (21) is installed inside the door body (2). The door frame (1) has a through hole at the handle (21). The front and rear sides of the through hole of the door frame (1) are connected to a detachable concealed plate (31). The mounting bracket (3) is connected inside the door body (2). The mounting bracket (3) rotates at both ends. A number of connecting pipes (32) are connected. A spherical spline (5) is slidably connected to one end of the connecting pipe (32) facing the middle. A spring (6) is installed inside the connecting pipe (32). One end of the spring (6) is connected to the spherical spline (5), and the other end is connected to the connecting pipe (32). A number of filter plates (4) are rotatably connected in the middle of the mounting frame (3). Both the top and bottom ends of the filter plates (4) are provided with mating grooves (41). The filter plates (4) are engaged with the spherical spline (5) through the mating grooves (41). An opening and closing assembly for driving the filter plates (4) to rotate is provided on the top of the mounting frame (3).

2. The smoke and fireproof door with a concealed ventilation structure according to claim 1, characterized in that: The opening and closing assembly includes a gear ring (7), a rack (8) and a cylinder (9). The cylinder (9) is mounted on the top of the mounting bracket (3). The gear ring (7) is fitted on the connecting pipe (32). The rack (8) is slidably connected to the top of the mounting bracket (3). The rack (8) is connected to the piston rod of the cylinder (9). The rack (8) meshes with the gear ring (7).

3. The smoke and fireproof door with a concealed ventilation structure according to claim 2, characterized in that: It also includes a filter screen (10), which is installed in the ventilation gap between the mounting bracket (3) and the door (2).

4. The smoke and fireproof door with a concealed ventilation structure according to claim 3, characterized in that: It also includes a soft pad (11), and the inside of the handle (21) is connected to the soft pad (11).

5. The smoke and fireproof door with a concealed ventilation structure according to claim 4, characterized in that: It also includes a hole plug (12), and the hole created by the fixed concealed plate (31) is provided with a hole plug (12).

6. The smoke and fireproof door with a concealed ventilation structure according to claim 5, characterized in that: It also includes a smoke detector (13), which is installed on the door (2) and penetrates the door (2).

7. The smoke and fireproof door with a concealed ventilation structure according to claim 6, characterized in that: It also includes an alarm (14), which is installed on the handle (21) and is wired to the smoke detector (13).

8. The smoke and fireproof door with a concealed ventilation structure according to claim 7, characterized in that: It also includes a sealing strip (15), with the sealing strip (15) connected to the middle of the inner ring of the door frame (1), and the outer ring of the door body (2) being squeezed together with the sealing strip (15).

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