A folding overhead fire door

Abstract

This invention discloses a folding swing fire door, including a door frame. An installation groove is formed on the top inner side of the door frame, and an automatic pushing structure for automatic closing in case of fire is provided within the installation groove. Guide rail grooves are formed on both sides of the installation groove, and several sliding casters are installed within the guide rail grooves. This folding swing fire door combines the space-saving and flexible opening and closing characteristics of traditional folding doors. In the event of a fire, the generated high temperature is transferred to the automatic pushing structure through the main heat strip, triggering it to push the door open. With the cooperation of the sliding casters and guide rail grooves, the folding door is automatically pushed and closed to isolate the fire from the door frame, eliminating the need for manual risk-taking to close it.

Description

Technical Field

[0001] This invention relates to the field of fire door technology, specifically a folding swing fire door. Background Technology

[0002] Shopping malls are typically designed to create a spacious and easily accessible atmosphere. Therefore, folding doors may be used in some areas. Due to their space-saving characteristics, folding doors are particularly practical in relatively narrow entrances and aisles. Their folding structure and easy operation make it easier for people to move between different areas, providing customers with a wider view and a more comfortable shopping experience. Furthermore, folding doors can be opened and closed flexibly, helping to distinguish different areas, control airflow, and divide multi-functional zones. This allows for better layout and more flexible use of space, improving the comfort and convenience of the mall. Folding doors are also used in residential applications such as balcony doors and interior partitions.

[0003] Shopping malls are densely populated areas with high fire safety requirements. In the event of a fire, the resulting casualties and property losses would be incalculable. Therefore, fire control and fire prevention design are crucial in the architectural design of commercial premises, necessitating the use of fire-resistant folding doors to provide safe evacuation routes and fire-resistant isolation in the event of a fire.

[0004] However, existing fire-resistant folding fire doors often require manual operation to close in the event of a fire to isolate the flames. This can be problematic if no staff are nearby or if staff fail to detect the fire in time, missing the optimal opportunity to contain it. Furthermore, staff pulling the folding fire door after it has started are at risk of burns. Additionally, while the closed folding fire door effectively blocks the spread of fire, gaps remain between the door and the frame. Most existing folding fire doors lack the ability to seal these gaps during a fire, allowing smoke to penetrate and harm people's respiratory system.

[0005] To address the aforementioned issues, there is an urgent need for innovative designs based on existing folding fire doors. Summary of the Invention

[0006] This invention addresses the problem of overly simplistic solutions in existing technologies by providing a folding fire door that is significantly different from existing technologies. It solves the problem that, as mentioned in the background, the door often requires manual operation to close and isolate a fire. However, this can lead to two issues: firstly, if no staff are nearby or fail to detect the fire in time, the optimal opportunity to isolate the fire may be missed; secondly, staff may be burned by the fire when they pull the folding fire door to close it after a fire breaks out.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a folding fireproof door, comprising a door frame, wherein an installation groove is provided on the top inner side of the door frame, and an automatic pushing structure for automatically closing the door in case of fire is provided in the installation groove; guide rail grooves are provided on both sides of the installation groove, and a plurality of sliding rollers are installed in the guide rail grooves, and each sliding roller is connected to a folding door for fireproofing, sealing and smoke prevention functions at its lower end; the folding doors are connected to each other by hinges; each folding door has a connecting heat-conducting strip from the center to the top of its end face, and the end of each connecting heat-conducting strip is attached to a main heat-conducting strip; the main heat-conducting strip is located on the outside of the door frame and is connected to the automatic pushing structure.

[0008] Preferably, the automatic pushing structure includes a heat-conducting cylinder, a first nickel shape memory alloy spring, a pushing rod, a pushing plate, a deflecting plate, a locking rod, and a storage rack. A heat-conducting cylinder is connected to one side of the mounting groove, and a first nickel shape memory alloy spring is connected inside the heat-conducting cylinder. A pushing rod is connected to the end of the first nickel shape memory alloy spring, and the end of the pushing rod passes through the heat-conducting cylinder and is connected to the pushing plate. An auxiliary first nickel shape memory alloy spring is connected to each side of the heat-conducting cylinder between the pushing plate and the inner wall of the mounting groove. A deflecting plate is rotatably connected to both sides of the pushing plate near its end, and a locking rod is attached to the end face of the deflecting plate and fixedly connected to the end of the pushing rod. The lower end of the deflecting plate is used to engage and push the sliding roller. A storage rack is connected to the outer wall of the heat-conducting cylinder.

[0009] Preferably, the storage rack consists of a rectangular plate and two strips, and the side of the storage rack is considered to be an "L" shaped structure. The inner side of the storage rack is used to store the locking and actuating plate so that it is in a horizontal state.

[0010] Preferably, the folding door includes a partition, a pushing part, and a blocking part. The partition includes a vertical partition and a horizontal partition. Each side of the folding door is provided with a vertical partition, and a horizontal partition is connected between the two vertical partitions near their ends.

[0011] Preferably, the pushing part includes a horizontal push plate, a piston rod, a sleeve, paraffin wax, a trigger block, a second nickel shape memory alloy spring, a trigger rod, and a vertical push plate. Each horizontal partition has a horizontal push plate attached to the side away from the center of the folding door. Each horizontal push plate is connected to a piston rod on the side near the center of the folding door, and the other end of each piston rod is respectively engaged and slidable within both ends of the sleeve. The sleeve is installed inside the folding door, and the sleeve is filled with paraffin wax that expands when heated between the ends of the piston rods. Each piston rod has trigger blocks connected to both sides of the outer wall of the sleeve, and a second nickel shape memory alloy spring nested in the outer wall of the piston rod is connected between the corresponding end of each trigger block and the sleeve. Each trigger block has a trigger rod attached to each side of the outer wall of each trigger block, and the end of each trigger rod passes through the corresponding vertical partition and is connected to a vertical push plate. The two vertical push plates are located on both sides inside the folding door between the vertical partition and the folding door.

[0012] Preferably, the sealing part includes fireproof foam and one-way valves. Fireproof foam for sealing gaps is filled between each horizontal push plate and the inner wall of the folding door and between each vertical push plate and the inner wall of the folding door. Each folding door has several one-way valves connected to its interior at equal intervals on its four sides.

[0013] Preferably, the main heat strip is configured as a concave structure, and the transverse region of the main heat strip concave structure is provided with a plurality of support rods at equal intervals for docking with the connecting heat strip.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the folding fire door, through the cooperation of the mounting groove, automatic pushing structure, guide rail groove, sliding rollers and main heat strip, enables the fire door to have the space-saving and flexible opening and closing characteristics of traditional folding doors. When a fire occurs, the high temperature generated will be transferred to the automatic pushing structure through the main heat strip, triggering it to push. With the cooperation of the sliding rollers and guide rail groove, the folding door is automatically pushed and closed with the door frame to isolate the fire, without the need for manual risk to close it.

[0015] By combining the folding door with the connecting heat-conducting strip, the main heat-conducting strip comes into contact with the connecting heat-conducting strip after the folding door is closed. This allows the temperature on the main heat-conducting strip to be transferred to the sleeve inside each folding door through the connecting heat-conducting strip. The paraffin inside the sleeve expands when heated, squeezing out the fire-retardant foam inside the folding door through a one-way valve. This fills the gaps between each folding door, as well as the gaps between the top of the folding door and the door frame, and between the folding door and the bottom and the ground. This prevents the dense smoke generated by a fire from passing through the gaps and damaging the respiratory tract of people in the isolated safe area. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a front view structural diagram of the present invention;

[0018] Figure 3 This is a front view cross-sectional structural diagram of the mounting slot of the present invention;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the locking rod of the present invention;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the storage rack of the present invention;

[0021] Figure 6 This is a frontal cross-sectional view of the trigger block in the state away from the trigger rod, according to the present invention.

[0022] Figure 7 This is a frontal cross-sectional view of the trigger block of the present invention when it is close to the trigger rod.

[0023] In the diagram: 1. Door frame; 2. Mounting groove; 3. Automatic pushing structure; 301. Heat-conducting cylinder; 302. First nickel shape memory alloy spring; 303. Push rod; 304. Push plate; 305. Actuating plate; 306. Locking rod; 307. Storage rack; 4. Guide rail groove; 5. Sliding caster; 6. Folding door; 601. Vertical partition; 602. Horizontal partition; 603. Horizontal push plate; 604. Piston rod; 605. Sleeve; 606. Paraffin wax; 607. Trigger block; 608. Second nickel shape memory alloy spring; 609. Trigger rod; 610. Vertical push plate; 611. Fireproof expanding foam; 612. One-way valve; 7. Connecting heat-conducting strip; 8. Main heat-conducting strip. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-7This invention provides a technical solution: a folding fireproof door, comprising a door frame 1, a mounting groove 2, an automatic pushing structure 3, a heat-conducting cylinder 301, a first nickel shape memory alloy spring 302, a pushing rod 303, a pushing plate 304, a toggle plate 305, a locking rod 306, a storage rack 307, a guide rail groove 4, sliding casters 5, a folding door 6, a vertical partition 601, a horizontal partition 602, a horizontal push plate 603, a piston rod 604, a sleeve 605, paraffin wax 606, a trigger block 607, a second nickel shape memory alloy spring 608, a trigger rod 609, a vertical push plate 610, fireproof foam 611, a one-way valve 612, a connecting heat-conducting strip 7, and a main heat-conducting strip 8. The mounting groove 2 is provided on the top inner side of the door frame 1, and the mounting groove 2 is provided with an automatic pushing structure for automatic door closing in case of fire. The structure 3 has guide rail grooves 4 on both sides of the mounting groove 2. Several sliding rollers 5 are installed in the guide rail grooves 4, and each sliding roller 5 is connected to a folding door 6 for fireproofing, sealing and smoke prevention. The folding doors 6 are connected by hinges. Each folding door 6 has a connecting heat conduction strip 7 from the center of the end face to the top. The end of each connecting heat conduction strip 7 is attached to the main heat conduction strip 8. The main heat conduction strip 8 is located on the outside of the door frame 1 and is connected to the automatic pushing structure 3.

[0026] The automatic pushing structure 3 includes a heat-conducting cylinder 301, a first nickel shape memory alloy spring 302, a pushing rod 303, a pushing plate 304, a toggle plate 305, a locking rod 306, and a storage rack 307. The heat-conducting cylinder 301 is connected to one side of the mounting groove 2, and the first nickel shape memory alloy spring 302 is connected inside the heat-conducting cylinder 301. The pushing rod 303 is connected to the end of the first nickel shape memory alloy spring 302, and the end of the pushing rod 303 passes through the heat-conducting cylinder 301 and is connected to the pushing plate 307. 4. A first nickel shape memory alloy spring 302 for auxiliary use is connected between the push plate 304 and the inner wall of the mounting groove 2 on both sides of the heat conduction cylinder 301. A toggle plate 305 is rotatably connected to both sides of the push plate 304 near the end. A locking rod 306 is attached to the end face of the toggle plate 305 and fixedly connected to the end of the push rod 303. The lower end of the toggle plate 305 is used to engage the push sliding roller 5. A storage rack 307 is connected to the outer wall of the heat conduction cylinder 301.

[0027] The storage rack 307 consists of a rectangular plate and two strips, and the storage rack 307 is viewed from the side as an "L" shaped structure. The inner side of the storage rack 307 is used to store the locking lever plate 305 so that it is in a horizontal state.

[0028] The folding door 6 includes a partition, a pushing part and a blocking part. The partition includes a vertical partition 601 and a horizontal partition 602. Each folding door 6 has a vertical partition 601 on each side inside, and a horizontal partition 602 is connected between the two vertical partitions 601 near their ends.

[0029] The pushing part includes a horizontal push plate 603, a piston rod 604, a sleeve 605, a paraffin wax 606, a trigger block 607, a second nickel shape memory alloy spring 608, a trigger rod 609, and a vertical push plate 610. Each horizontal partition 602 has a horizontal push plate 603 attached to the side away from the center of the folding door 6. Each horizontal push plate 603 has a piston rod 604 connected to the side near the center of the folding door 6. The other end of each piston rod 604 is respectively engaged and slidably engaged within the two ends of the sleeve 605. The sleeve 605 is installed inside the folding door 6, and the sleeve 605 is located between the ends of the piston rods 604. The device is filled with paraffin wax 606 that expands when heated. Each piston rod 604 is connected to trigger blocks 607 on both sides of the outer wall outside the sleeve 605. A second nickel shape memory alloy spring 608 is connected between the corresponding end of each trigger block 607 and the sleeve 605. Each trigger block 607 has a trigger rod 609 attached to each side of the outer wall. The end of each trigger rod 609 passes through the corresponding vertical partition 601 and is connected to a vertical push plate 610. The two vertical push plates 610 are located on both sides inside the folding door 6, between the vertical partition 601 and the folding door 6.

[0030] The sealing part includes fireproof expanding foam 611 and one-way valve 612. Fireproof expanding foam 611 for sealing gaps is filled between each horizontal push plate 603 and the inner wall of the folding door 6 and between each vertical push plate 610 and the inner wall of the folding door 6. Several one-way valves 612 connected to the interior are provided at equal intervals on the four sides of each folding door 6.

[0031] The main heat strip 8 is set as a concave structure, and the transverse area of ​​the concave structure of the main heat strip 8 is provided with several support rods at equal intervals for docking with the connecting heat strip 7.

[0032] Working principle: According to Figure 1 As shown, the door frame 1 and folding door 6 are first installed in the area of ​​use. During normal daily use, the automatic push structure 3 will not be triggered to work. When a fire occurs, the temperature is transferred to the heat-conducting cylinder 301 in the mounting groove 2 through the main heat strip 8. The heat-conducting cylinder 301 transfers heat to the first nickel memory alloy spring 302, causing the first nickel memory alloy spring 302 to deform due to heat. The push rod 303 extends out of the heat-conducting cylinder 301. The push rod 303 drives the push plate 304 to move at the same time. As the push plate 304 moves, the actuating plate 305 rotatably connected to it is disengaged from the storage rack 307 and falls under the action of gravity. At the same time, it is vertically 90° under the limiting action of the locking rod 306. As the push rod 303 continues to move out of the heat-conducting cylinder 301, the actuating plate 305 contacts the sliding hanger 5 connected to the folding door 6, causing the sliding hanger 5 and the folding door 6 to move to the other side of the door frame 1 to close, achieving the effect of automatically closing the door to isolate the fire.

[0033] As the folding door 6 closes with the door frame 1, the main heat strip 8 connects with the connecting heat-conducting strip 7 on each folding door 6. Heat from the main heat strip 8 is transferred to the sleeve 605 via the connecting heat-conducting strip 7, causing the paraffin wax 606 inside the sleeve 605 to expand upon heating. Simultaneously, the sleeve 605 transfers heat to the second nickel shape memory alloy spring 608, causing it to deform and assist in pushing the piston rod 604 out of the sleeve 605. This causes the piston rod 604 to push the horizontal push plate 603, thus opening the fireproof expanding foam 611 between the two vertical partitions 601 and the horizontal partition 602 through a single... The piston rod 604 moves, causing the trigger block 607 to press the trigger rod 609 to move, which in turn causes the fireproof foam 611 between the vertical push plate 610 and the two sides of the folding door 6 to be squeezed out from the one-way valve 612, filling the gap between the folding door 6 and the folding door 6. This achieves automatic sealing of the gap after the door is closed, preventing dense smoke from passing through the gap and causing damage to people's respiratory tract. This is the working principle of the folding fireproof door.

[0034] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A folding swing fire door, comprising a door frame (1), characterized in that: The top of the inner side of the door frame (1) is provided with an installation groove (2), and the installation groove (2) is provided with an automatic push structure (3) for automatically closing the door in case of fire. The two sides of the installation groove (2) are provided with guide rail grooves (4), and a number of sliding rollers (5) are installed in the guide rail grooves (4). Each sliding roller (5) is connected to a folding door (6) for fire prevention, sealing and smoke prevention. The folding doors (6) are connected by hinges. Each folding door (6) has a connecting heat-conducting strip (7) from the center of the end face to the top. The end of each connecting heat-conducting strip (7) is attached to the main heat-conducting strip (8). The main heat-conducting strip (8) is located on the outside of the door frame (1) and is connected to the automatic push structure (3). The folding door (6) includes a partition, a pushing part and a blocking part. The partition includes a vertical partition (601) and a horizontal partition (602). Each folding door (6) has a vertical partition (601) on each side inside, and a horizontal partition (602) is connected between the two vertical partitions (601) near their ends. The pushing part includes a horizontal partition (602), a horizontal push plate (603), a piston rod (604), a sleeve (605), paraffin wax (606), a trigger block (607), a second nickel memory alloy spring (608), a trigger rod (609), and a vertical push plate (610). Each horizontal partition (602) has a horizontal push plate (603) attached to the side away from the center of the folding door (6). Each horizontal push plate (603) has a piston rod (604) connected to the side near the center of the folding door (6). The other end of each piston rod (604) is respectively engaged and slidable within the two ends of the sleeve (605). The sleeve (605) is installed inside the folding door (6), and the sleeve (605) is located within the piston rod. (604) The ends are filled with heat-expanding paraffin wax (606). Each piston rod (604) is connected to trigger blocks (607) on both sides of the outer wall outside the sleeve (605). Each trigger block (607) and the corresponding end of the sleeve (605) are connected to a second nickel memory alloy spring (608) nested in the outer wall of the piston rod (604). Each trigger block (607) is attached to a trigger rod (609) on both sides of the outer wall. Each trigger rod (609) is connected to a vertical push plate (610) through the corresponding vertical partition (601) at its end. The two vertical push plates (610) are located on both sides inside the folding door (6) and between the vertical partition (601) and the folding door (6).

2. A folding swing fire door according to claim 1, characterized in that: The automatic pushing structure (3) includes a heat-conducting cylinder (301), a first nickel memory alloy spring (302), a pushing rod (303), a pushing plate (304), a toggle plate (305), a locking rod (306), and a storage rack (307). The heat-conducting cylinder (301) is connected to one side of the mounting groove (2), and the first nickel memory alloy spring (302) is connected inside the heat-conducting cylinder (301). The pushing rod (303) is connected to the end of the first nickel memory alloy spring (302), and the end of the pushing rod (303) passes through the heat-conducting cylinder (301) and is connected to the pushing plate (307). 04), between the push plate (304) and the inner wall of the mounting groove (2), there is a first nickel memory alloy spring (302) for auxiliary use on each side of the heat conduction cylinder (301). The push plate (304) is rotatably connected to the two sides near the end, and the end face of the push plate (305) is attached to the locking rod (306), and the locking rod (306) is fixedly connected to the end of the push rod (303). The lower end of the push plate (305) is used to engage the push sliding wheel (5). The outer wall of the heat conduction cylinder (301) is connected to the storage rack (307).

3. A folding swing fire door according to claim 2, characterized in that: The storage rack (307) consists of a rectangular plate and two strips, and the side of the storage rack (307) is considered to be an "L" shaped structure. The inner side of the storage rack (307) is used to store the locking lever plate (305) so that it is in a horizontal state.

4. A folding swing fire door according to claim 1, characterized in that: The sealing part includes fireproof foam (611) and one-way valve (612). Fireproof foam (611) for sealing gaps is filled between each of the horizontal push plates (603) and the inner wall of the folding door (6) and between each of the vertical push plates (610) and the inner wall of the folding door (6). Each of the four sides of the folding door (6) is provided with a number of one-way valves (612) that connect to its interior at equal intervals.

5. A folding swing fire door according to claim 1, characterized in that: The main heat strip (8) is configured as a concave structure, and the transverse area of ​​the concave structure of the main heat strip (8) is provided with several support rods at equal intervals for docking with the docking heat conduction strip (7).

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