Fireproof door capable of preventing smoke and flame outside door from spreading into door

Abstract

The fireproof door comprises a door frame, a main door body and an auxiliary door body, the auxiliary door body used for limiting the main door body is hinged to the left side of the door frame, the main door body used for sealing and fire prevention is hinged to the right side of the door frame, and a bottom sealing frame is arranged on the right side in the lower end of the door frame. Compared with the prior art, the thermal expansion door has the advantages that when the thermal expansion strip is aged or damaged, the thermal expansion strip can be detached only by pulling due to the fact that the inner side of the thermal expansion strip is magnetically connected with the magnetic strip through the iron sheet strip on the inner side of the rubber strip, and replacement is quite convenient; and if the sealing strip is aged or damaged, the sealing strip fixed through the bolt can be easily disassembled and replaced, the problem that the sealing part of the fireproof door is difficult to replace after being aged or damaged is solved, and the sealing performance of the fireproof door is effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of fireproof doors, and particularly relates to a fireproof door which can prevent smoke and flame outside the door from spreading into the door. Background Art

[0002] A fire door is a door that meets the requirements of fire resistance, stability, integrity and thermal insulation within a certain period of time. It is a fireproof partition with a certain fire resistance installed between fire compartments, evacuation stairwells, vertical shafts, etc. In addition to the functions of ordinary doors, fire doors can also prevent the spread of fire and smoke. They can prevent the spread of fire within a certain period of time, ensure the evacuation of personnel, and buy time for escape and fire extinguishing. When used in conjunction with fire escape routes, fire losses can be minimized.

[0003] The smoke-proof performance of fire doors depends largely on the smoke strips (also known as fireproof sealing strips) installed around them. The smoke strips will automatically expand when exposed to heat to form an effective seal to prevent smoke from entering through the door gap. However, in actual use, the smoke strips may not be installed, may age and fall off, may be damaged by humans, or may fail to expand effectively due to quality problems, resulting in a significant weakening of the smoke-proof function of the fire door. Therefore, we hope to design a fire door with a new structure to solve this problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a fire door that prevents smoke and flames outside the door from spreading into the door, thereby solving the problems raised in the above-mentioned background technology.

[0005] The utility model is realized by the following technical scheme: a fireproof door for preventing smoke and flames outside the door from spreading into the door, comprising: a door frame, a main door and a secondary door, the left side of the door frame is hinged with a secondary door for limiting the position of the main door, and the right side of the door frame is hinged with a main door for sealing and fire prevention;

[0006] A bottom sealing frame is provided on the right side of the lower end of the door frame, and an upper sealing frame is provided on the right side of the upper end of the door frame;

[0007] The main door includes a door body, a sealing assembly and an observation window. The left side, the upper side and the lower side of the door body are all provided with sealing assemblies, and the upper left side of the door body is installed with an observation window.

[0008] As a preferred embodiment, a bottom sealing groove is opened rearwardly on the front side of the bottom sealing frame, an upper sealing groove is opened rearwardly on the front side of the upper sealing frame, the bottom sealing frame is disconnected from the left side of the lower end of the auxiliary door, and the left side of the upper sealing frame is disconnected from the upper end of the auxiliary door. In actual use, the auxiliary door is in a closed state when closed, and a sealing structure is provided at the connection between it and the door frame.

[0009] As a preferred embodiment, the right front side of the auxiliary door is recessed backward to form a side groove, the upper side of the side groove penetrates upwardly through the upper end of the auxiliary door, and the lower side of the side groove penetrates downwardly through the lower end of the auxiliary door. The arrangement of the bottom sealing groove, the upper sealing groove and the side groove, in conjunction with the sealing assembly, can seal the main door to prevent smoke and flames outside the door from spreading into the door.

[0010] As a preferred embodiment, the right front side of the auxiliary door is recessed rearward to form a side groove, the upper side of the side groove upwardly penetrates the upper end of the auxiliary door, and the lower side of the side groove downwardly penetrates the lower end of the auxiliary door.

[0011] As a preferred embodiment, the upper end of the side groove is connected to the left end of the bottom sealing groove, and the structure and size of the cross section of the side groove match the structure and size of the cross section of the bottom sealing groove;

[0012] The upper end of the side groove is connected to the left end of the upper sealing groove, the structure and size of the side groove cross section match the structure and size of the bottom sealing groove cross section, and a sealing groove is arranged backwards in the middle of the side groove, the upper sealing groove and the bottom sealing groove.

[0013] As a preferred embodiment, the sealing assembly includes an extended door panel, a sealing strip and a fireproof strip. The extended door panel is in a U-shaped structure. A sealing strip is glued to the inner side of the extended door panel. The sealing strip is a flame-retardant rubber strip. The sealing strip has a U-shaped structure. A plurality of countersunk screw holes distributed at equal intervals are arranged on the outer side of the extended door panel.

[0014] As a preferred embodiment, an embedding groove is provided in the middle of the front side of the sealing strip, a magnetic strip is glued inside the embedding groove, a heat expansion strip is fixed inside the embedding groove by magnetic attraction of the magnetic strip, a rubber strip is glued inside the heat expansion strip, an iron strip is glued to the inner wall of the rubber strip, and the iron strip is magnetically connected to the magnetic strip;

[0015] The cross-sectional dimensions and structure of the heat expansion strip match the dimensions and structure of the sealing groove.

[0016] After adopting the above technical solution, the beneficial effects of the utility model are as follows: by providing the bottom sealing groove, the upper sealing groove and the side groove, in actual use, the bottom sealing groove, the upper sealing groove and the side groove cooperate with the sealing assembly to greatly improve the sealing performance of the entire fire door, and can prevent external smoke and flames from spreading into the room after the main door is closed;

[0017] The setting of the sealing component can effectively prevent the flame and smoke from spreading into the door, thus improving the safety performance of the entire fire door;

[0018] When the heat expansion strip is aged or damaged, since the inner side of the heat expansion strip is magnetically connected to the magnetic strip through the iron strip inside the rubber strip, it can be removed by pulling, and replacement is very convenient. If the sealing strip is aged or damaged, the sealing strip fixed with bolts can be easily removed and replaced, avoiding the problem that the sealing parts of the fire door are difficult to replace after aging and damage, and effectively ensuring the sealing performance of the fire door. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 The utility model is a schematic diagram of the overall structure of a fire door that prevents smoke and flames outside the door from spreading into the door.

[0021] Figure 2 This is a schematic diagram of a main door structure of a fire door according to the utility model for preventing smoke and flames outside the door from spreading into the door.

[0022] Figure 3 The utility model is a schematic diagram of a door frame structure of a fire door for preventing smoke and flames outside the door from spreading into the door.

[0023] Figure 4 for Figure 2 A is an enlarged schematic diagram.

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of a sealing component of a fire door for preventing smoke and flames outside the door from spreading into the door according to the utility model.

[0025] Figure 6 for Figure 3 Schematic diagram of the enlarged view at B.

[0026] In the figure, 100 is a door frame, 110 is a bottom sealing frame, 111 is a bottom sealing groove, 120 is an upper sealing frame, and 121 is an upper sealing groove;

[0027] 200-secondary door, 210-side slot;

[0028] 300-main door, 310-door body, 320-sealing assembly, 321-extended door panel, 322-sealing strip, 323-heat expansion strip, 324-countersunk screw hole, 325-magnetic strip, 326-iron strip, 327-rubber strip, 330-observation window. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figures 1 to 6 The utility model provides a technical solution: a fireproof door for preventing smoke and flames outside the door from spreading into the door, comprising: a door frame 100, a main door 300 and a secondary door 200, the left side of the door frame 100 is hinged with the secondary door 200 for limiting the main door 300, and the right side of the door frame 100 is hinged with the main door 300 for sealing and fire prevention;

[0031] A bottom sealing frame 110 is disposed on the right side of the lower end of the door frame 100, and an upper sealing frame 120 is disposed on the right side of the upper end of the door frame 100;

[0032] The main door 300 includes a door body 310 , a sealing assembly 320 and an observation window 330 . The sealing assembly 320 is disposed on the left side, the upper side and the lower side of the door body 310 , and the observation window 330 is installed on the upper left side of the door body 310 .

[0033] See also Figure 3 , Figure 6 A bottom sealing groove 111 is opened on the front side of the bottom sealing frame 110, and an upper sealing groove 121 is opened on the front side of the upper sealing frame 120. The bottom sealing frame 110 is disconnected from the left side of the lower end of the auxiliary door 200, and the left side of the upper sealing frame 120 is disconnected from the upper end of the auxiliary door 200. In actual use, the auxiliary door 200 is in a closed state when closed, and a sealing structure is provided at the connection between it and the door frame 100.

[0034] The right front side of the auxiliary door 200 is recessed backward to form a side groove 210. The upper side of the side groove 210 penetrates upwardly through the upper end of the auxiliary door 200, and the lower side of the side groove 210 penetrates downwardly through the lower end of the auxiliary door 200. The arrangement of the bottom sealing groove 111, the upper sealing groove 121 and the side groove 210, in conjunction with the sealing assembly 320, can seal the main door 300 to prevent smoke and flames outside the door from spreading into the door.

[0035] The right front side of the auxiliary door 200 is recessed backward to form a side groove 210 , the upper side of the side groove 210 penetrates the upper end of the auxiliary door 200 upward, and the lower side of the side groove 210 penetrates the lower end of the auxiliary door 200 downward.

[0036] The upper end of the side groove 210 is connected to the left end of the bottom sealing groove 111, and the structure and size of the cross section of the side groove 210 match the structure and size of the cross section of the bottom sealing groove 111;

[0037] The upper end of the side groove 210 communicates with the left end of the upper sealing groove 121. The structure and dimensions of the cross-section of the side groove 210 match the structure and dimensions of the cross-section of the bottom sealing groove 111. A sealing groove is provided at the middle of the inside of the side groove 210, the upper sealing groove 121, and the bottom sealing groove 111, all of which are arranged backward.

[0038] As the first embodiment of the present invention, by providing the bottom sealing groove 111, the upper sealing groove 121, and the side groove 210, during actual use, the bottom sealing groove 111, the upper sealing groove 121, and the side groove 210 cooperate with the sealing component 320, greatly improving the sealing performance of the entire fire door. After the main door 300 is closed, it can prevent external smoke and flames from spreading into the room.

[0039] Please refer to Figures 1 to 6 , the sealing component 320 includes an extended door panel 321, a sealing strip 322, and a fireproof strip board. The extended door panel 321 has a U-shaped structure. A sealing strip 322 is adhesively bonded to the inner side of the extended door panel 321. The sealing strip 322 is a flame-retardant rubber strip 327, and the structure of the sealing strip 322 is in a U-shaped structure. A plurality of countersunk screw holes 324 are evenly distributed on the outer side of the extended door panel 321.

[0040] An embedding groove is provided in the middle of the front side of the sealing strip 322. A magnetic strip 325 is adhesively bonded inside the embedding groove. A thermal expansion strip 323 is magnetically fixed inside the embedding groove through the magnetic strip 325. A rubber strip 327 is adhesively bonded to the inner side of the thermal expansion strip 323. An iron sheet strip 326 is adhesively bonded to the inner wall of the rubber strip 327. The iron sheet strip 326 is magnetically connected to the magnetic strip 325;

[0041] The cross-sectional dimensions and structure of the thermal expansion strip 323 match the dimensions and structure of the sealing groove.

[0042] As the second embodiment of the present invention, based on the above first embodiment, during actual use, when both the main door 300 and the sub-door 200 are closed, the sealing component 320 of the main door 300 will cover the front side of the right end of the sub-door 200, the front side of the bottom sealing frame 110, and the front side of the upper sealing frame 120. The sealing strip 322 inside the extended door panel 321 will be correspondingly clamped inside the upper sealing groove 121, the bottom sealing groove 111, and the side groove 210. At the same time, the thermal expansion strip 323 located inside the sealing strip 322 expands in volume after being heated, thereby sealing the sealing groove. It is difficult for the flames and smoke on the other side of the entire fire door to break through the sealing protection formed by the cooperation of the bottom sealing groove 111, the upper sealing groove 121, and the side groove 210 with the sealing component 320 (the entire fire door is made of high-temperature resistant and fire-resistant materials, which is the prior art and will not be elaborated here). It can effectively prevent the spread of flames and smoke into the door, improving the safety performance of the entire fire door;

[0043] When the heat expansion strip 323 is aged or damaged, since the inner side of the heat expansion strip 323 is magnetically connected to the magnetic strip 325 through the iron strip 326 on the inner side of the rubber strip 327, it can be disassembled by pulling, and replacement is very convenient. If the sealing strip 322 is aged or damaged, the sealing strip 322 fixed by bolts can be easily disassembled and replaced, avoiding the problem that the sealing components of the fire door are difficult to replace after aging or damage, and effectively ensuring the sealing performance of the fire door.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fire door that prevents smoke and flames outside the door from spreading into the door, comprising: Door frame (100), main door (300) and sub-door (200), characterized in that a sub-door (200) for limiting the main door (300) is hinged on the left side of the door frame (100), and a main door (300) for fireproof sealing is hinged on the right side of the door frame (100); On the right side inside the lower end of the door frame (100), a bottom sealing frame (110) is provided, and on the right side inside the upper end of the door frame (100), an upper sealing frame (120) is provided; The main door (300) includes a door body (310), a sealing assembly (320) and an observation window (330). Sealing assemblies (320) are provided on the left side, upper side and lower side of the door body (310), and an observation window (330) is installed on the upper left side of the door body (310).

2. A fire door for preventing smoke and flames outside the door from spreading into the door as claimed in claim 1, characterized in that: On the front side of the bottom sealing frame (110), a bottom sealing groove (111) is opened backward, and on the front side of the upper sealing frame (120), an upper sealing groove (121) is opened backward.

3. A fire door for preventing smoke and flames outside the door from spreading into the door as claimed in claim 2, characterized in that: The size and structure of the bottom sealing groove (111) are the same as those of the upper sealing frame (120), and the size and structure of the bottom sealing groove (111) are matched with those of the upper sealing groove (121).

4. A fire door for preventing smoke and flames outside the door from spreading into the door as claimed in claim 3, characterized in that: On the right front side of the sub-door (200), a side groove (210) is recessed backward. The upper side of the side groove (210) penetrates upward through the upper end of the sub-door (200), and the lower side of the side groove (210) penetrates downward through the lower end of the sub-door (200).

5. A fire door for preventing smoke and flames outside the door from spreading into the door as claimed in claim 4, characterized in that: The upper end of the side groove (210) is communicated with the left end of the bottom sealing groove (111), and the structure and size of the cross section of the side groove (210) are matched with those of the cross section of the bottom sealing groove (111); The upper end of the side groove (210) is communicated with the left end of the upper sealing groove (121). The structure and size of the cross section of the side groove (210) are matched with those of the cross section of the bottom sealing groove (111). A sealing groove is provided backward in the middle of the side groove (210), the upper sealing groove (121) and the bottom sealing groove (111).

6. A fire door for preventing smoke and flames outside the door from spreading into the door as claimed in claim 1, characterized in that: The sealing assembly (320) includes an extended door panel (321), a sealing strip (322) and a fireproof strip board. The extended door panel (321) has a C-shaped structure. A sealing strip (322) is adhesively bonded to the inner side of the extended door panel (321). The sealing strip (322) is a flame-retardant rubber strip (327). The structure of the sealing strip (322) is a C-shaped structure. A plurality of countersunk screw holes (324) are evenly distributed on the outer side of the extended door panel (321).

7. A fire door for preventing smoke and flames outside the door from spreading into the door as claimed in claim 6, characterized in that: In the middle of the front side of the sealing strip (322), an embedding groove is opened. A magnetic strip (325) is adhesively bonded inside the embedding groove. A thermal expansion strip (323) is magnetically fixed inside the embedding groove through the magnetic strip (325). A rubber strip (327) is adhesively bonded to the inner side of the thermal expansion strip (323). An iron sheet strip (326) is adhesively bonded to the inner wall of the rubber strip (327). The iron sheet strip (326) is magnetically connected to the magnetic strip (325); The cross-sectional size and structure of the thermal expansion strip (323) are matched with those of the sealing groove.

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