Flame-retardant heat-insulation steel fireproof door

Abstract

The utility model relates to the technical field of fireproof doors, and particularly discloses a flame-retardant heat-insulation steel fireproof door which comprises a door frame, a first boss and a second boss are arranged on the inner side face of the door frame, the second boss is arranged on the inner side face of the first boss, fireproof door bodies are rotationally installed on the two sides of the door frame respectively, and the fireproof door bodies are arranged on the inner side face of the first boss. Sealing gaskets are arranged on the faces, opposite to the first boss and the second boss, of the fireproof door body, door closers are installed on the upper side of the fireproof door body and the upper side of the door frame, and a locking mechanism connected with the door frame is arranged on the fireproof door body. Through the arrangement of the fireproof door bodies on the two sides of the door frame and the connection and fixation of the locking mechanism, the firm sealing performance of the connection between the fireproof door bodies and the door frame is improved, heat and smoke are effectively isolated, the escape time of a user is prolonged, and the use safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fire doors, in particular to a flame-retardant and heat-insulating steel fire door. Background Art

[0002] A fire door refers to a door that can meet the requirements of fire resistance stability, integrity and heat insulation within a certain period of time; it is a fire partition with a certain fire resistance set in fire compartments, evacuation stairwells, vertical shafts, etc., and can be used for fire evacuation in case of a fire. It is mainly for the evacuation of people and the prevention of the spread of fire in case of a sudden fire; the existing fire doors are mainly single-layered, and their fire and heat insulation performance is not very good. In case of a fire, smoke and heat are easily transmitted through the steel fire door into the stairwell, thus reducing the escape time of users. Content of the Utility Model

[0003] The purpose of the utility model is to provide a flame-retardant and heat-insulating steel fire door to solve the above problems.

[0004] The utility model realizes the above purpose through the following technical solutions:

[0005] A flame-retardant and heat-insulating steel fire door includes a door frame. A first boss and a second boss are arranged on the inner side surface of the door frame, and the second boss is arranged on the inner side surface of the first boss. Fire door bodies are rotatably installed on both sides of the door frame. Sealing gaskets are arranged on the opposite surfaces of the fire door bodies and the first boss and the second boss. A door closer is installed on the upper side of the fire door body and the door frame, and a locking mechanism for connecting with the door frame is arranged on the fire door body.

[0006] Further setting: The locking mechanism includes a support shaft arranged on the fire door body. Handles are fixed at both ends of the support shaft. An L-shaped connecting seat is fixed on the inner side of the fire door body on the support shaft. A first connecting rod and a second connecting rod are connected to the L-shaped connecting seat. A torsion spring is sleeved on the support shaft between the L-shaped connecting seat and the fire door body. The other ends of the first connecting rod and the second connecting rod are connected with a locking assembly for locking the fire door body.

[0007] Further setting: The locking assembly includes a cam rotatably connected to the inner side of the fire door body. A pin shaft is adjacently arranged at the corner of the fire door body. The pin shaft passes through the outer wall of the fire door body. A hemispherical shape is arranged at one end of the pin shaft close to the cam, and a flange is arranged on the upper side of the hemispherical shape. A spring is sleeved on the outer diameter of the pin shaft inside the fire door body, and a blind hole corresponding to the pin shaft is arranged on the plane of the first boss.

[0008] Further setting: A vacuum glass window is embedded in the fire door body, and the vacuum glass window is double-layered.

[0009] Further setting: The support shaft is rotatably connected to the fire door body, the L-shaped connecting seat is rotatably connected to the first connecting rod and the second connecting rod, and the cam is rotatably connected to the first connecting rod and the second connecting rod.

[0010] Further setting: The cam is rotationally connected to the fire door body, the pin shaft is slidably connected to the fire door body, the thickness of the cam is greater than the diameter of the pin shaft, and the cam is slidably connected to the pin shaft.

[0011] Further setting: After the fire door body is closed, it is embedded in the door frame, and the interior of the fire door body is filled with heat-insulating materials.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] Through the arrangement of the fire door bodies on both sides of the door frame and the connection and fixation of the locking mechanism, the firm sealing performance of the connection between the fire door body and the door frame is improved, effectively isolating heat and smoke, increasing the escape time of users, and ensuring the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 is an isometric view of a flame-retardant and heat-insulating steel fire door according to the present utility model;

[0016] Figure 2 is a schematic structural view of the door body of a flame-retardant and heat-insulating steel fire door according to the present utility model in an open state;

[0017] Figure 3 is a schematic structural view of a flame-retardant and heat-insulating steel fire door according to the present utility model in a disassembled state;

[0018] Figure 4 is a schematic semi-sectional structural view of the door body of a flame-retardant and heat-insulating steel fire door according to the present utility model;

[0019] Figure 5 is Figure 4 an enlarged structural view of part A of

[0020] Figure 6 is Figure 4 an enlarged structural view of part B of

[0021] Figure 7 is Figure 4 an enlarged structural view of part C of

[0022] The description of the reference numerals in the drawings is as follows:

[0023] 1. Door frame; 11. First boss; 12. Second boss; 2. Fire door body; 21. Vacuum glass window; 22. Sealing gasket; 3. Door closer; 4. Locking mechanism; 41. Support shaft; 42. L-shaped connecting seat; 43. Handle; 44. Torsion spring; 45. First connecting rod; 46. Second connecting rod; 47. Cam; 48. Pin shaft; 49. Spring. Detailed implementation mode

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] As Figures 1-7As shown in the figure, a flame-retardant and heat-insulating steel fire door includes a door frame 1. On the inner side surface of the door frame 1, a first boss 11 and a second boss 12 are provided. The second boss 12 is arranged on the inner side surface of the first boss 11. Fire door bodies 2 are rotatably installed on both sides of the door frame 1. Sealing gaskets 22 are provided on the opposite surfaces of the fire door bodies 2 and the first boss 11 and the second boss 12 to improve the sealing performance of the closure between the fire door bodies 2 and the door frame 1. A door closer 3 is installed on the upper side of the fire door bodies 2 and the door frame 1 to keep the fire door bodies 2 in a closed state all the time. A locking mechanism 4 for connecting with the door frame 1 is provided on the fire door bodies 2. After the fire door bodies 2 are closed, they are embedded in the door frame 1. Heat-insulating materials are filled inside the fire door bodies 2. A vacuum glass window 21 is embedded in the fire door bodies 2. The vacuum glass window 21 is in a double-layer structure, which is convenient for observing the states on both sides through the vacuum glass window 21.

[0028] In this embodiment: The locking mechanism 4 includes a support shaft 41 provided on the fire door body 2. Handles 43 are fixed at both ends of the support shaft 41. An L-shaped connecting seat 42 is fixed on the support shaft 41 inside the fire door body 2. A first connecting rod 45 and a second connecting rod 46 are connected to the L-shaped connecting seat 42. A torsion spring 44 is sleeved on the support shaft 41 between the L-shaped connecting seat 42 and the fire door body 2. The other ends of the first connecting rod 45 and the second connecting rod 46 are connected with a locking assembly for locking the fire door body 2.

[0029] The locking assembly includes a cam 47 rotatably connected to the inside of the fire door body 2. A pin shaft 48 is adjacent to the corner of the fire door body 2. The pin shaft 48 passes through the outer wall of the fire door body 2. A hemispherical shape is provided at one end of the pin shaft 48 close to the cam 47, and a flange is provided on the upper side of the hemispherical shape. A spring 49 is sleeved on the outer diameter of the pin shaft 48 inside the fire door body 2. A blind hole corresponding to the pin shaft 48 is provided on the plane of the first boss 11. The support shaft 41 is rotatably connected to the fire door body 2. The L-shaped connecting seat 42 is rotatably connected to the first connecting rod 45 and the second connecting rod 46. The cam 47 is rotatably connected to the first connecting rod 45 and the second connecting rod 46; the cam 47 is rotatably connected to the fire door body 2. The pin shaft 48 is slidably connected to the fire door body 2. The thickness of the cam 47 is greater than the diameter of the pin shaft 48. The cam 47 is slidably connected to the pin shaft 48. When opening, by rotating the handle 43 to drive the L-shaped connecting seat 42 on the support shaft 41 to rotate, the first connecting rod 45 and the second connecting rod 46 drive the cam 47 to rotate. The spring 49 on the pin shaft 48 pushes the pin shaft 48 to move towards the inside of the fire door body 2, and pulls the fire door body 2 out of the door frame 1; when the fire door body 2 is closed, the torsion spring 44 makes the handle 43 rotate and reset to the horizontal state. The L-shaped connecting seat 42 supports the first connecting rod 45 and the second connecting rod 46 to drive the cam 47 to rotate, so that the convex part of the cam 47 pushes the pin shaft 48 to extend out of the fire door body 2 and insert into the door frame 1.

[0030] Working principle and usage process of the utility model: When in use, fix the door frame 1 in the door opening. Rotate the handle 43 to drive the L-shaped connecting seat 42 on the support shaft 41 to rotate, so that the first connecting rod 45 and the second connecting rod 46 drive the cam 47 to rotate. The spring 49 on the pin shaft 48 pushes the pin shaft 48 to move towards the inner side of the fire door body 2, pushing the fire door body 2 into the inner side of the door frame 1, making the sealing gasket 22 contact the door frame 1. Release the handle 43, and the torsion spring 44 makes the handle 43 rotate and reset to the horizontal state. The L-shaped connecting seat 42 supports the first connecting rod 45 and the second connecting rod 46 to drive the cam 47 to rotate, so that the convex part of the cam 47 pushes the pin shaft 48 to extend out of the fire door body 2 and insert into the door frame 1, connecting and fixing the fire door body 2 and the door frame 1, improving the firm sealing performance of the connection between the fire door body 2 and the door frame 1. Moreover, by arranging the fire door bodies 2 on both sides of the door frame 1, the isolation effect on heat and smoke is improved.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. A flame-retardant and heat-insulating steel fire door, comprising a door frame (1), characterized in that: On the inner side surface of the door frame (1), a first boss (11) and a second boss (12) are provided. The second boss (12) is arranged on the inner side surface of the first boss (11). Fire door bodies (2) are rotatably installed on both sides of the door frame (1). Sealing gaskets (22) are provided on the opposite surfaces of the fire door bodies (2) and the first boss (11) and the second boss (12). A door closer (3) is installed on the upper side of the fire door body (2) and the door frame (1). A locking mechanism (4) for connecting with the door frame (1) is provided on the fire door body (2).

2. The fireproof steel door with flame retardancy and heat insulation according to claim 1, wherein: The locking mechanism (4) includes a support shaft (41) provided on the fire door body (2). Handles (43) are fixed at both ends of the support shaft (41). An L-shaped connecting seat (42) is fixed on the support shaft (41) inside the fire door body (2). A first connecting rod (45) and a second connecting rod (46) are connected to the L-shaped connecting seat (42). A torsion spring (44) is sleeved on the support shaft (41) between the L-shaped connecting seat (42) and the fire door body (2). The other ends of the first connecting rod (45) and the second connecting rod (46) are connected to a locking assembly for locking the fire door body (2).

3. The fireproof steel door with flame retardancy and heat insulation according to claim 2, characterized in that: The locking assembly includes a cam (47) rotatably connected inside the fire door body (2). A pin shaft (48) is adjacently arranged at the corner of the fire door body (2). The pin shaft (48) penetrates through the outer wall of the fire door body (2). One end of the pin shaft (48) close to the cam (47) is hemispherical, and a flange is provided on the upper side of the hemispherical shape. A spring (49) is sleeved on the outer diameter of the pin shaft (48) inside the fire door body (2). A blind hole corresponding to the pin shaft (48) is provided on the plane of the first boss (11).

4. A flame-retardant and heat-insulating steel fire door according to claim 1, characterized in that: A vacuum glass window (21) is embedded in the fire door body (2), and the vacuum glass window (21) is double-layered.

5. A flame-retardant and heat-insulating steel fire door according to claim 3, characterized in that: The support shaft (41) is rotatably connected to the fire door body (2). The L-shaped connecting seat (42) is rotatably connected to the first connecting rod (45) and the second connecting rod (46). The cam (47) is rotatably connected to the first connecting rod (45) and the second connecting rod (46).

6. A flame-retardant and heat-insulating steel fire door according to claim 5, characterized in that: The cam (47) is rotatably connected to the fire door body (2). The pin shaft (48) is slidably connected to the fire door body (2). The thickness of the cam (47) is greater than the diameter of the pin shaft (48), and the cam (47) is slidably connected to the pin shaft (48).

7. A flame-retardant and heat-insulating steel fire door according to claim 1, characterized in that: After the fire door body (2) is closed, it is embedded in the door frame (1), and the inside of the fire door body (2) is filled with heat-insulating material.

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