Thermal insulation type fire door

Abstract

This utility model relates to the field of fire door technology and discloses a heat-insulated fire door, including a central adjusting plate, a first heat insulation layer and a second heat insulation layer disposed on the outer side of the central adjusting plate, an inner fireproof layer disposed between the central adjusting plate and the first heat insulation layer, an outer fireproof layer disposed between the central adjusting plate and the second heat insulation layer, and a first support plate and a second support plate slidably connected to the inner side of the central adjusting plate. By rotating the first and second rotating shafts, a push plate can be moved via a boss on the outer side of the turntable, thereby causing the first support plates located on the upper and lower sides to move synchronously. At this time, the sealing gasket can be compressed by the first support plate to achieve a seal on the fire door. This structure only requires two rotating shafts to achieve the expansion and contraction of the sealing gasket, and the two handles located at the top and bottom are centrally distributed, making manual operation convenient.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, and in particular to a heat-insulating fire door. Background Technology

[0002] Chinese patent application CN202322127756.X discloses a heat-insulating fire door, comprising a fire door frame, a fire door body, an outer fireproof layer, an inner fireproof layer, and a central adjusting plate. The central adjusting plate has adjusting grooves around its perimeter. A first support plate and a second support plate are slidably positioned within the adjusting grooves. A sealing gasket extending to the outside is provided on the outer side of the first support plate. Multiple springs are evenly distributed on the rear side of the second support plate. A rotating shaft rotatably connects the first and second support plates, and a cam on the rotating shaft engages with the second support plate. Multiple support rods are provided between the first and second support plates. The advantages of this invention compared to existing technologies are: this invention achieves fireproof and heat-insulating effects solely through the combination of inner and outer protective bodies and central heat insulation. Combined with the retractable first support plate and sealing gasket, it provides a complete seal to prevent smoke ingress, while reducing the impact of conventional sealing components on normal door use.

[0003] The aforementioned rotating shafts are numerous, and each shaft is located in a different position. Due to the significant differences in handle height, operation is inconvenient for personnel. Utility Model Content

[0004] To address the shortcomings of the comparative literature, this utility model provides a heat-insulated fire door, which solves the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a heat-insulating fire door, comprising a central adjusting plate, a first heat-insulating layer and a second heat-insulating layer disposed on the outer side of the central adjusting plate, an inner fireproof layer disposed between the central adjusting plate and the first heat-insulating layer, an outer fireproof layer disposed between the central adjusting plate and the second heat-insulating layer, and a first support plate and a second support plate slidably connected to the inner side of the central adjusting plate. A support rod is movably sleeved inside the second support plate on the outer side of the first support plate. A retaining ring is engaged on the outer side of one end of the support rod extending outside the second support plate, and a limiting rod is movably sleeved inside the central adjusting plate on the other end of the support rod extending outside the retaining ring. A spring is fitted on the outer side of the support rod between the first support plate and the second support plate. A sealing gasket is provided on the outer side of the first support plate and fitted inside the middle adjusting plate. A push plate is provided in the middle of the second support plate and fitted inside the middle adjusting plate. The middle adjusting plate is rotatably connected to a first rotating shaft and a second rotating shaft that are distributed vertically and movably fitted between the first heat insulation layer and the inner fireproof layer. A turntable located inside the middle adjusting plate is fixedly fitted on the outer side of both the first rotating shaft and the second rotating shaft. The turntable is provided with equally spaced bosses on the outer side. A limit mechanism is fixedly fitted on the outer side of the end of the first rotating shaft and the second rotating shaft that extends outside the first heat insulation layer. A second spring piece is provided on the outer side of the second support plate away from the push plate. A baffle located on one side of the second spring piece is fixedly fitted inside the middle adjusting plate.

[0006] Preferably, the limiting mechanism includes a handle fixedly mounted on the outside of the first rotating shaft and the second rotating shaft, and a first spring plate fixedly mounted inside the first rotating shaft and the second rotating shaft. A connecting plate located outside the first spring plate is provided on one side of the handle, and a limiting post is provided on the side of the handle.

[0007] Preferably, the first heat insulation layer has a limiting hole inside that is adapted to the limiting post.

[0008] This utility model has the following advantages:

[0009] 1. By rotating the first and second rotating shafts, the push plate can be moved by the boss on the outside of the turntable, which in turn can drive the first support plate located on the upper and lower sides to move synchronously. At this time, the sealing gasket can be compressed by the first support plate to achieve the sealing of the fire door. With this structure, only two rotating shafts are needed to realize the extension and retraction of the sealing gasket, and the two handles located on the upper and lower sides are centrally distributed, making it convenient for personnel to operate manually.

[0010] 2. The elastic force of the second spring can push the second support plate to move, while simultaneously moving the sealing gasket to the inside of the central adjustment plate. This prevents the sealing gasket from rubbing against the door frame during the opening and closing of the fire door, thereby reducing the wear of the sealing gasket. Attached Figure Description

[0011] Figure 1 This is a partial cross-sectional view of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the structure of this utility model;

[0013] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A;

[0014] Figure 4 This is a partial schematic diagram of the limiting mechanism of this utility model;

[0015] Figure 5 for Figure 2 A partial schematic diagram;

[0016] Figure 6 for Figure 5 A partial schematic diagram;

[0017] Figure 7 for Figure 6 A partial schematic diagram.

[0018] In the diagram: 1. Central adjustment plate; 2. First heat insulation layer; 3. Second heat insulation layer; 4. Inner fireproof layer; 5. Outer fireproof layer; 6. First support plate; 7. Second support plate; 8. Support rod; 9. Snap ring; 10. Limiting rod; 11. Spring; 12. Sealing gasket; 13. Push plate; 14. First rotating shaft; 15. Second rotating shaft; 16. Turntable; 17. Boss; 18. Limiting mechanism; 181. Handle; 182. First spring; 183. Connecting plate; 184. Limiting post; 19. Second spring; 20. Baffle; 21. Limiting hole. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1 to 7A heat-insulating fire door includes a central adjusting plate 1, a first heat insulation layer 2 and a second heat insulation layer 3 disposed on the outer side of the central adjusting plate 1, an inner fireproof layer 4 disposed between the central adjusting plate 1 and the first heat insulation layer 2, an outer fireproof layer 5 disposed between the central adjusting plate 1 and the second heat insulation layer 3, and a first support plate 6 and a second support plate 7 slidably connected to the inner side of the central adjusting plate 1. A support rod 8 is movably sleeved inside the second support plate 7 on the outer side of the first support plate 6. A retaining ring 9 is engaged at the outer end of the support rod 8 extending outside the second support plate 7. The retaining ring 9 limits the movement of the support rod 8, allowing the second support plate 7 to reset under the elastic force of a second spring 19. A limiting rod 10 is movably sleeved inside the central adjusting plate 1 at the outer end of the support rod 8 extending outside the retaining ring 9. The limiting rod 10 guides and limits the movement of the second support plate 7, preventing jamming during movement. A first support plate 6 and a second support plate 7 are slidably sleeved on the outer side of the support rod 8. A spring 11 is placed between the support plate 6 and the second support plate 7. A sealing gasket 12 is provided on the outer side of the first support plate 6 and fitted inside the middle adjusting plate 1. A push plate 13 is provided in the middle of the second support plate 7 and fitted inside the middle adjusting plate 1. The middle adjusting plate 1 is rotatably connected to a first rotating shaft 14 and a second rotating shaft 15 that are distributed vertically and movably fitted between the first heat insulation layer 2 and the inner fireproof layer 4. A turntable 16 located inside the middle adjusting plate 1 is fixedly fitted on the outer side of both the first rotating shaft 14 and the second rotating shaft 15. The turntable 16 is provided with equally spaced bosses 17 on the outer side. The bosses 17 enable the turntable 16 to push the push plate 13 to move during rotation. A limit mechanism 18 is fixedly fitted on the outer side of the first rotating shaft 14 and the second rotating shaft 15 extending outside the first heat insulation layer 2. A second spring piece 19 is provided on the outer side of the second support plate 7 away from the push plate 13. A baffle 20 located on the side of the second spring piece 19 is fixedly fitted inside the middle adjusting plate 1.

[0021] The limiting mechanism 18 includes a handle 181 fixedly mounted on the outside of the first rotating shaft 14 and the second rotating shaft 15, and a first spring piece 182 fixedly mounted inside the first rotating shaft 14 and the second rotating shaft 15. The handle 181 allows personnel to manually rotate the first rotating shaft 14 or the second rotating shaft 15. A connecting plate 183 located outside the first spring piece 182 is provided on one side of the handle 181, and a limiting post 184 is provided on the side of the handle 181. The elastic force of the first spring piece 182 can drive the handle 181 to move along the axial direction of the first rotating shaft 14 or the second rotating shaft 15, thereby facilitating the insertion of the limiting post 184 on the handle 181 into the limiting hole 21.

[0022] The first heat insulation layer 2 has a limiting hole 21 that matches the limiting post 184. The limiting hole 21 and the limiting post 184 work together to limit the handle 181, preventing the handle 181 from rotating and allowing the handle 181 to rotate at a set angle, thus enabling the extension and retraction of the sealing gasket 12.

[0023] Working principle: When the fire door is closed, the handle 181 on the outside of the first rotating shaft 14 is pulled by hand to move it along the axial direction of the first rotating shaft 14, while compressing the first spring 182. At the same time, the handle 181 is rotated clockwise, which drives the turntable 16 to rotate. The rotation of the turntable 16 can push the first support plate 6 to move through the cooperation of the boss 17 and the push plate 13. At the same time, the first support plate 6 moves, which drives the sealing gasket 12 to extend. When the limiting post 184 rotates from above the first limiting hole 21 to above the second limiting hole 21, it stops rotating. At this time, under the elastic force of the first spring 182, the handle 181 is driven to move in the opposite direction along the axial direction of the first rotating shaft 14, while the limiting post 184 is inserted into the interior of the limiting hole 21, thus completing the extension of the upper sealing gasket 12.

[0024] Pulling the handle 181 on the outside of the second rotating shaft 15 by hand moves it along the axial direction of the second rotating shaft 15, compressing the first spring 182. Rotating the handle 181 counterclockwise drives the turntable 16 to rotate. The rotation of the turntable 16, through the cooperation of the boss 17 and the push plate 13, pushes the first support plate 6 to move. As the first support plate 6 moves, the sealing gasket 12 extends. When the limiting post 184 rotates from above the first limiting hole 21 to above the second limiting hole 21, it stops rotating. At this time, under the elastic force of the first spring 182, the handle 181 moves in the opposite direction along the axial direction of the first rotating shaft 14, while the limiting post 184 is inserted into the limiting hole 21, completing the extension of the lower sealing gasket 12.

Claims

1. A heat-insulating fire door, comprising a central adjusting plate (1), a first heat insulation layer (2) and a second heat insulation layer (3) disposed on the outer side of the central adjusting plate (1), an inner fireproof layer (4) disposed between the central adjusting plate (1) and the first heat insulation layer (2), an outer fireproof layer (5) disposed between the central adjusting plate (1) and the second heat insulation layer (3), and a first support plate (6) and a second support plate (7) slidably connected to the inner side of the central adjusting plate (1), characterized in that: A support rod (8) is provided on the outer side of the first support plate (6) and is movably sleeved inside the second support plate (7). A retaining ring (9) is engaged on the outer side of one end of the support rod (8) extending outside the second support plate (7), and a limiting rod (10) is provided on the outer side of one end of the support rod (8) extending outside the retaining ring (9) and is movably sleeved inside the middle adjusting plate (1). A spring (11) is sleeved on the outer side of the support rod (8) and located between the first support plate (6) and the second support plate (7). A sealing gasket (12) is provided on the outer side of the first support plate (6) and is sleeved inside the middle adjusting plate (1). A push plate (13) is provided in the middle of the second support plate (7) and is sleeved inside the middle adjusting plate (1). The middle adjusting plate (1) rotates internally. A first rotating shaft (14) and a second rotating shaft (15) are connected and movably fitted between the first heat insulation layer (2) and the inner fireproof layer (4). A turntable (16) located inside the middle adjusting plate (1) is fixedly fitted on the outer side of the first rotating shaft (14) and the second rotating shaft (15). The turntable (16) is provided with equally spaced bosses (17) on the outer side. A limit mechanism (18) is fixedly fitted on the outer side of the first rotating shaft (14) and the second rotating shaft (15) extending out of the first heat insulation layer (2). A second spring piece (19) is provided on the outer side of the second support plate (7) away from the push plate (13). A baffle (20) located on the side of the second spring piece (19) is fixedly fitted inside the middle adjusting plate (1).

2. The fire door of claim 1, wherein: The limiting mechanism (18) includes a handle (181) fixedly fitted on the outside of the first rotating shaft (14) and the second rotating shaft (15) and a first spring piece (182) fixedly fitted inside the first rotating shaft (14) and the second rotating shaft (15). A connecting plate (183) located outside the first spring piece (182) is provided on one side of the handle (181), and a limiting post (184) is provided on the side of the handle (181).

3. The fire door of claim 2, wherein: The first heat insulation layer (2) has a limiting hole (21) inside that is adapted to the limiting post (184).

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