Fireproof door with smoke blocking function

Abstract

The utility model belongs to the field of fireproof doors, and particularly relates to a fireproof door with a smoke blocking function, which comprises a door frame, a door plate mounted in the door frame through hinges and a doorsill mounted at the bottom of the door frame, a sealing groove is arranged on the end face where the door plate is attached to the door frame, and upper support plates which are distributed in the sealing groove in a bilateral symmetry manner are mounted at the upper end of the door plate. The upper end of the upper supporting plate is provided with an upper sealing strip, the left end and the right end of the door plate are respectively provided with a side supporting plate located in the sealing groove, and the outer end of each side supporting plate is provided with a side face sealing strip. In the smoke blocking working state, the gap between the door plate and the door frame is filled with the upper sealing strip and the side face sealing strip, the smoke blocking function is achieved, and in the conventional state, the upper sealing strip and the side face sealing strip cannot generate resistance to the opening and closing action of the door plate.

Description

Technical Field

[0001] The utility model belongs to the field of fireproof doors, in particular to a fireproof door with a smoke blocking function. Background Art

[0002] Fire doors refer to doors that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. They are installed in fire compartments, evacuation stairwells and vertical shafts to prevent the spread of fire and smoke.

[0003] Conventional fire doors are sealed by filling the gap between door panels and door frames with sealing strips to block the passage of smoke. This method requires the sealing strips to fit tightly against the door panels and door frames. Therefore, when the door panels are opened and closed, the sealing strips will generate resistance, causing inconvenience in daily use of fire doors.

[0004] The utility model designs a fireproof door with smoke blocking function to solve the above problems. Utility Model Content

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A fireproof door with a smoke blocking function comprises a door frame, a door panel installed in the door frame through hinges and a threshold installed at the bottom of the door frame, a sealing groove is arranged at the end face where the door panel and the door frame are in contact, an upper support plate symmetrically distributed in the sealing groove is arranged at the upper end of the door panel, an upper sealing strip is arranged at the upper end of the upper support plate, a telescopic mechanism capable of driving the upper sealing strip to move upward and abut against the inner wall of the door frame is arranged at the upper end of the door frame, side support plates located in the sealing groove are arranged at the left and right ends of the door panel respectively, side sealing strips are arranged at the outer ends of the side support plates, and rope pushing components connected to the upper support plate and in contact with the inner ends of the side support plates are arranged at the left and right ends of the door panel respectively.

[0007] As a preferred solution, a cavity is provided at the upper end of the door frame, and the telescopic mechanism includes a metal weight block installed in the cavity and an electromagnet located on the upper side of the metal weight block, a push rod is installed at the lower end of the metal weight block, and a telescopic block located between the two upper support plates and on the lower side of the push rod is slidably provided in the sealing groove, and a lever assembly located on the lower side of the two upper support plates is installed at the upper end of the sealing groove, one end of the lever assembly is in contact with the lower end of the telescopic block, and the other end of the lever assembly is in contact with the lower end of the upper support plate.

[0008] As a preferred solution, the lever assembly includes a lever rotatably connected to the sealing groove, one end of the lever extends to the lower side of the telescopic block, and the other end of the lever is provided with a protrusion that contacts the lower end of the adjacent upper support plate.

[0009] As a preferred solution, a secondary door panel covering the front side of the sealing groove is installed at the front end of the door panel.

[0010] As a preferred solution, the upper ends of the door panel and the auxiliary door panel are both provided with grooves whose width is greater than the push rod.

[0011] As a preferred solution, the rope pushing assembly includes brackets respectively installed on the lower end of the upper support plate and the bottom end of the sealing groove. The two brackets are respectively located on the upper and lower sides of adjacent side support plates. Notches are provided on the brackets. A rope is connected between the two brackets and the rope passes through the notch. The notch is located on the outer side of the side support plate, and the rope is in contact with the inner end of the side support plate.

[0012] As a preferred solution, both the upper support plate and the side support plate are provided with limit plates which are slidably connected to the limit grooves inside the sealing groove.

[0013] As a preferred solution, an end cover covering the front end of the cavity is installed on the door frame.

[0014] As a preferred solution, handles are installed at both the front and rear ends of the door panel, and corresponding locks are installed on the side surfaces of the door panel and the door frame.

[0015] Compared with the existing technology, the advantages of the utility model are:

[0016] 1. The upper sealing strip and side sealing designed by the utility model have a smoke blocking working state against the inner wall of the door frame and a normal state in which they can move freely. In the smoke blocking working state, the upper sealing strip and the side sealing strip fill the gap between the door panel and the door frame to achieve the smoke blocking function. In the normal state, the upper sealing strip and the side sealing strip will not produce resistance to the opening and closing action of the door panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the utility model.

[0018] Figure 2 It is a rear schematic diagram of the utility model.

[0019] Figure 3 It is a schematic diagram of the internal structure of the door frame and door panel of the utility model.

[0020] Figure 4 It is a schematic diagram of a door panel of the present utility model.

[0021] Figure 5 It is a top view schematic diagram of the door panel of the present utility model.

[0022] Figure 6 It is a side view schematic diagram of the door panel of the present utility model.

[0023] Figure 7 This utility model Figure 3 Schematic diagram of perspective A.

[0024] Figure 8 This utility model Figure 3 Schematic diagram of perspective A.

[0025] Fig. 9 This utility model Figure 3 Schematic diagram of perspective B.

[0026] The reference numbers in the figure are as follows: 1. door frame; 2. door panel; 3. hinge; 4. door sill; 5. sealing groove; 6. upper support plate; 7. upper sealing strip; 8. side support plate; 9. side sealing strip; 10. telescopic mechanism; 11. rope pushing assembly; 12. lever assembly; 20. cavity; 21. metal weight block; 22. electromagnet; 23. push rod; 24. lever; 25. protrusion; 26. auxiliary door panel; 27. groove; 28. telescopic block; 30. bracket; 31. notch; 32. rope; 40. limit plate; 41. end cover; 42. handle; 43. lock. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments or drawings are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] A fire door with smoke blocking function, such as Figures 1 to 3 As shown, it includes a door frame 1, a door panel 2 installed in the door frame 1 through a hinge 3 and a threshold 4 installed at the bottom of the door frame 1, a sealing groove 5 is provided at the end surface where the door panel 2 and the door frame 1 are in contact, an upper support plate 6 symmetrically distributed in the sealing groove 5 is installed on the upper end of the door panel 2, an upper sealing strip 7 is installed on the upper end of the upper support plate 6, and side support plates 8 located in the sealing groove 5 are respectively provided at the left and right ends of the door panel 2, and side sealing strips 9 are installed on the outer ends of the side support plates 8. Limiting plates 40 slidably connected to the limiting groove inside the sealing groove 5 are installed on the upper support plate 6 and the side support plate 8, so that the upper support plate 6 can only move vertically up and down in the sealing groove 5, and the side support plate 8 can only move horizontally left and right in the sealing groove 5;

[0029] A telescopic mechanism 10 is installed at the upper end of the door frame 1, which can drive the upper sealing strip 7 to move upward and abut against the inner wall of the door frame 1. Rope pushing assemblies 11 connected to the upper support plate 6 and in contact with the inner ends of the side support plates 8 are installed at the left and right ends of the door panel 2 respectively. Handles 42 are installed at the front and rear ends of the door panel 2, and corresponding locks 43 are installed on the sides of the door panel 2 and the door frame 1.

[0030] The upper sealing strip 7 and the side sealing strip 9 have a smoke blocking working state in which they are against the inner wall of the door frame 1, and a normal state in which they can move freely. In the smoke blocking working state, the upper sealing strip 7 and the side sealing strip 9 fill the gap between the door panel 2 and the door frame 1 to achieve the smoke blocking function. In the normal state, the upper sealing strip 7 and the side sealing strip 9 will not produce resistance to the opening and closing actions of the door panel 2.

[0031] like Figure 3 , Figure 7 and Figure 8 As shown, a cavity 20 is provided at the upper end of the door frame 1, and an end cover 41 covering the front end of the cavity 20 is installed on the door frame 1. The telescopic mechanism 10 includes a metal load-bearing block 21 installed in the cavity 20 and an electromagnet 22 located on the upper side of the metal load-bearing block 21. A push rod 23 is installed at the lower end of the metal load-bearing block 21. A telescopic block 28 located between the two upper support plates 6 and on the lower side of the push rod 23 is slidably provided in the sealing groove 5. The electromagnet 22 is connected to the smoke alarm system in the corridor. Under normal circumstances, the electromagnet 22 is in a working state of being energized to generate a magnetic field. When the smoke alarm system sounds an alarm or the external power supply line of the electromagnet 22 is disconnected due to a fire or other factors, the electromagnet 22 will be in a power-off state.

[0032] When the electromagnet 22 is energized, it can absorb the metal weight block 21 and maintain it in a raised state. In this state, the bottom end of the push rod 23 is located inside the cavity 20. When the electromagnet 22 is de-energized, the metal weight block 21 falls and is in a lowered state. In this state, the bottom end of the push rod 23 extends to the lower side of the cavity 20 and can push the telescopic block 28 below to move downward.

[0033] like Figure 7 and Figure 8 As shown, the upper end of the sealing groove 5 is installed with a lever assembly 12 located at the lower side of the two upper support plates 6 respectively, one end of the lever assembly 12 contacts the lower end of the telescopic block 28, and the other end of the lever assembly 12 contacts the lower end of the upper support plate 6.

[0034] The lever assembly 12 includes a lever 24 rotatably connected to the sealing groove 5, one end of the lever 24 extends to the lower side of the telescopic block 28, and the other end of the lever 24 is provided with a protrusion 25 that contacts the lower end of the adjacent upper support plate 6. When the telescopic block 28 moves downward, it can drive the lever 24 to rotate and push up the upper support plate 6.

[0035] like Figure 4 and Figure 5 As shown, a secondary door panel 26 covering the front side of the sealing groove 5 is installed at the front end of the door panel 2, and a groove 27 with a width greater than the push rod 23 is provided at the upper ends of the door panel 2 and the secondary door panel 26.

[0036] like Figure 3 , Figure 6 and Fig. 9As shown, the rope pushing assembly 11 includes a bracket 30 respectively installed on the lower end of the upper support plate 6 and the bottom end of the sealing groove 5, the two brackets 30 are respectively located on the upper and lower sides of the adjacent side support plates 8, and a notch 31 is provided on the bracket 30. A rope 32 is connected between the two brackets 30 and the rope 32 passes through the notch 31. The notch 31 is located on the outer side of the side support plate 8, and the rope 32 contacts the inner end of the side support plate 8; in the initial state, the rope 32 is in a relaxed state, and the side support plate 8 can move freely in the sealing groove 5. When the upper support plate 6 is in an upward moving state, the rope 32 will be tightened, and the tightened rope 32 will apply a force to the side support plate 8 toward the outer side of the sealing groove 5.

[0037] Working principle:

[0038] When the electromagnet 22 is powered off, the metal weight block 21 falls and pushes the telescopic block 28 downward through the push rod 23. The downward movement of the telescopic block 28 drives the lever 24 to rotate and push up the upper support plate 6, so that the upper sealing strip 7 on the upper support plate 6 moves up and abuts against the inner wall of the door frame 1, and the upper sealing strip 7 fills the gap between the upper end of the door panel 2 and the door frame 1.

[0039] In addition, the upward movement of the upper support plate 6 can tighten the rope 32. The tightened rope 32 will apply a force to the side support plate 8 toward the outside of the sealing groove 5, so that the side sealing strip 9 on the side support plate 8 is against the inner wall of the door frame 1. The side sealing strip 9 fills the gap between the left and right end faces of the door panel 2 and the door frame 1. Under the action of the upper sealing strip 7 and the side sealing strip 9, smoke is blocked from passing through the gap between the door panel 2 and the door frame 1.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A fire door with smoke blocking function, characterized in that: The invention comprises a door frame (1), a door panel (2) installed in the door frame (1) through a hinge (3), and a threshold (4) installed at the bottom of the door frame (1); a sealing groove (5) is provided at the end surface of the door panel (2) and the door frame (1); an upper support plate (6) symmetrically distributed in the sealing groove (5) is installed at the upper end of the door panel (2); an upper sealing strip (7) is installed at the upper end of the upper support plate (6); a telescopic mechanism (10) capable of driving the upper sealing strip (7) to move upward and abut against the inner wall of the door frame (1) is installed at the upper end of the door frame (1); side support plates (8) located in the sealing groove (5) are respectively provided at the left and right ends of the door panel (2); side sealing strips (9) are installed at the outer ends of the side support plates (8); and rope pushing components (11) connected to the upper support plate (6) and in contact with the inner ends of the side support plates (8) are respectively installed at the left and right ends of the door panel (2).

2. A fire door with smoke blocking function according to claim 1, characterized in that: A cavity (20) is provided at the upper end of the door frame (1), and the telescopic mechanism (10) comprises a metal load-bearing block (21) installed in the cavity (20) and an electromagnet (22) located on the upper side of the metal load-bearing block (21); a push rod (23) is installed at the lower end of the metal load-bearing block (21); a telescopic block (28) is slidably provided in the sealing groove (5) and is located between the two upper support plates (6) and on the lower side of the push rod (23); a lever assembly (12) is installed at the upper end of the sealing groove (5) and is located on the lower side of the two upper support plates (6); one end of the lever assembly (12) contacts the lower end of the telescopic block (28), and the other end of the lever assembly (12) contacts the lower end of the upper support plate (6).

3. A fire door with smoke blocking function according to claim 2, characterized in that: The lever assembly (12) comprises a lever (24) rotatably connected to the sealing groove (5), one end of the lever (24) extending to the lower side of the telescopic block (28), and the other end of the lever (24) being provided with a protrusion (25) contacting the lower end of the adjacent upper support plate (6).

4. The fire door with smoke blocking function according to claim 2, characterized in that: A secondary door panel (26) covering the front side of the sealing groove (5) is installed at the front end of the door panel (2).

5. The fire door with smoke blocking function according to claim 4, characterized in that: The upper ends of the door panel (2) and the auxiliary door panel (26) are both provided with a groove (27) having a width greater than that of the top rod (23).

6. The fire door with smoke blocking function according to claim 2, characterized in that: The rope pushing assembly (11) comprises brackets (30) respectively mounted on the lower end of the upper support plate (6) and the bottom end of the sealing groove (5), the two brackets (30) being respectively located on the upper and lower sides of the adjacent side support plates (8), the brackets (30) being provided with notches (31), a rope (32) being connected between the two brackets (30) and the rope (32) passing through the notch (31), the notch (31) being located on the outer side of the side support plate (8), and the rope (32) being in contact with the inner end of the side support plate (8).

7. The fire door with smoke blocking function according to claim 6, characterized in that: The upper support plate (6) and the side support plate (8) are both provided with a limit plate (40) which is slidably connected to the limit groove inside the sealing groove (5).

8. The fire door with smoke blocking function according to claim 2, characterized in that: An end cover (41) covering the front end of the cavity (20) is mounted on the door frame (1).

9. The fire door with smoke blocking function according to claim 1, characterized in that: Handles (42) are installed at both the front and rear ends of the door panel (2), and corresponding locks (43) are installed on the side of the door panel (2) and the door frame (1).

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