CN117345090A - Civil air defense engineering fireproof door - Google Patents
Civil air defense engineering fireproof door Download PDFInfo
- Publication number
- CN117345090A CN117345090A CN202311657281.3A CN202311657281A CN117345090A CN 117345090 A CN117345090 A CN 117345090A CN 202311657281 A CN202311657281 A CN 202311657281A CN 117345090 A CN117345090 A CN 117345090A
- Authority
- CN
- China
- Prior art keywords
- door
- plate
- door frame
- door body
- sealing layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007123 defense Effects 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 53
- 238000009423 ventilation Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims description 26
- 238000000605 extraction Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
- E06B5/164—Sealing arrangements between the door or window and its frame, e.g. intumescent seals specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
- E06B1/04—Frames for doors, windows, or the like to be fixed in openings
- E06B1/52—Frames specially adapted for doors
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/70—Door leaves
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
- E06B2007/023—Air flow induced by fan
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Special Wing (AREA)
Abstract
The invention belongs to the technical field of civil air defense engineering, and particularly discloses a fireproof door for civil air defense engineering, which comprises a door body and a door frame, wherein sealing layers are arranged on the door body and the door frame in a surrounding mode, and each sealing layer comprises a plurality of layers of plate-shaped structures which are parallel to each other and are distributed in a gap mode. When the fireproof door is closed, the plate-shaped structures of the door body and the sealing layer on the door frame are mutually inserted at intervals and leave gaps, so that labyrinth ventilation gaps are formed. The plate-like structure of the sealing layer is deformable at high temperatures. When fire occurs, the plate-shaped structure of the sealing layer can deform at high temperature, and the deformed plate-shaped structures are mutually extruded, so that labyrinth ventilation gaps are blocked, a large amount of smoke is prevented from passing through the fireproof door through the labyrinth ventilation gaps, the daily ventilation requirement can be met, and the spread of fire and the spread of smoke can be effectively prevented when the fire occurs.
Description
Technical Field
The invention belongs to the technical field of civil air defense engineering, and particularly relates to a fireproof door for civil air defense engineering.
Background
In the construction field, particularly in civil air defense engineering, fire doors are widely used to prevent fire spread and smoke diffusion, so as to protect personnel life safety and property loss. To prevent smoke from diffusing, fire doors typically require a tight seal. However, an excessively sealed environment creates a series of problems that can lead to a lack of fresh air supply in the room, can limit the flow of moisture and humid air, can lead to increased humidity in the room, can cause mold contamination in the room, can lead to the accumulation of contaminants and odors in the room that are difficult to remove, and the like.
Therefore, there is a need for a fire door that can meet the requirements of daily ventilation, and also can effectively prevent the spread of fire and the spread of smoke when a fire occurs.
Disclosure of Invention
In view of the above-mentioned drawbacks, an object of the present invention is to provide a civil air defense engineering fireproof door, in which sealing layers are circumferentially arranged on a door body and a door frame, and when the fireproof door is closed, plate-shaped structures of the sealing layers on the door body and the door frame are mutually inserted at intervals and leave gaps therebetween, so as to form a labyrinth ventilation gap. When fire occurs, the plate-shaped structure of the sealing layer can deform at high temperature, and the deformed plate-shaped structures are mutually extruded, so that labyrinth ventilation gaps are blocked, a large amount of smoke is prevented from passing through the fireproof door through the labyrinth ventilation gaps, the daily ventilation requirement can be met, and the spread of fire and the spread of smoke can be effectively prevented when the fire occurs.
In order to achieve the above purpose, the invention provides a civil air defense engineering fireproof door, which comprises a door body and a door frame, wherein sealing layers are arranged on the door body and the door frame in a surrounding mode, and each sealing layer comprises a plurality of layers of plate-shaped structures which are parallel to each other and are distributed in gaps. When the fireproof door is closed, the plate-shaped structures of the door body and the sealing layer on the door frame are mutually inserted at intervals and leave gaps, so that labyrinth ventilation gaps are formed. The plate-like structure of the sealing layer is deformable at high temperatures.
Further, a high-temperature deformable material is fixed to the surface of the plate-like structure.
Further, the high temperature deformable material is fixed to the surface of the plate-like structure by coating or pasting.
Further, the door body and the door frame both comprise two groups of sealing layers, and the sealing layers are respectively arranged close to the front side and the rear side of the door body. And the door frame is provided with an air extraction opening, and the air extraction opening is positioned between the two groups of sealing layers.
Further, the air extraction opening is communicated with a building fresh air system.
Further, a liquid containing part is arranged in the door body or the door frame, liquid is filled in the liquid containing part, and the liquid containing part is communicated with a sealing layer at the top of the door body or the door frame through a channel.
Further, an elastic air bag is provided in the liquid containing portion, and gas is stored in the elastic air bag.
Compared with the prior art, the invention has at least the following beneficial effects:
1. the door body and the door frame are provided with sealing layers in a surrounding mode. When the fireproof door is closed, the plate-shaped structures of the door body and the sealing layer on the door frame are mutually inserted at intervals and leave gaps, so that labyrinth ventilation gaps are formed. When fire breaks out, the plate-shaped structures of the sealing layer can deform at high temperature, and the deformed plate-shaped structures are mutually extruded, so that labyrinth ventilation gaps are blocked, and a large amount of smoke is prevented from passing through the fireproof door through the labyrinth ventilation gaps. The invention can not only meet the daily ventilation requirement, but also effectively prevent the spread of fire and the diffusion of smoke when fire occurs.
2. The invention does not limit the thickness and the material of the plate-shaped structure, but fixes the high-temperature deformable material on the surface of the plate-shaped structure, and the plate-shaped structure provides structural strength in daily use and provides sealing when in fire. The high-temperature deformable material is fixed on the surface of the plate-shaped structure by coating or pasting, so that the plate-shaped structure is low in cost, easy to replace and easy to recover after a fire disaster.
3. According to the invention, two groups of sealing layers are arranged, and an extraction opening is arranged between the two groups of sealing layers, and the extraction opening is communicated with a fresh air system of a building. When a fire disaster occurs, the sealing layer at one side close to the fire disaster is sealed, a small amount of smoke passing through the sealing layer is directly sucked away by the air suction opening, and the possibility that the smoke enters the other side of the fireproof door is eliminated. At ordinary times, the fresh air system can promote the ventilation of preventing fire door both sides place simultaneously through the extraction opening of door frame. The new trend system from taking of this scheme utilization building has improved flue gas isolation ability, has indirectly promoted the ventilation in fire door both sides place simultaneously.
4. According to the invention, the liquid containing part is arranged in the door body and is communicated with the sealing layer at the top of the door body through the channel, so that when a fire disaster occurs, the liquid is heated and swelled, overflows from the sealing layer at the top of the door body, gradually spreads over the whole sealing layer under the action of gravity and capillary effect, fills gaps in the sealing layer, and further isolates smoke and high temperature. The elastic air bag accelerates the liquid overflowing speed.
Drawings
Fig. 1 is a perspective view of the civil air defense engineering fireproof door of the present invention;
figure 2 is a side cross-sectional view of the civil air defense engineering fire door of the invention;
FIG. 3 is an enlarged view of FIG. 2 at A;
fig. 4 is a perspective exploded view of the civil air defense engineering fireproof door of the present invention;
fig. 5 is a further perspective exploded view of the civil air defense engineering fire door of the present invention;
FIG. 6 is a side cross-sectional view of the door body of the present invention;
fig. 7 is an enlarged view at B in fig. 6.
In the figure: 100-door body, 110-liquid accommodation portion, 120-channel, 130-elastic air bag, 200-door frame, 210-extraction opening, 300-sealing layer, 310-plate structure, 320-labyrinth ventilation gap.
Detailed Description
In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present invention.
In the description of the present embodiment, it should also be noted that the terms "disposed," "connected," and "connected" are to be construed broadly, unless explicitly stated or limited otherwise.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1 to 5, the embodiment discloses a civil air defense engineering fireproof door, which comprises a door body 100 and a door frame 200, wherein sealing layers 300 are respectively arranged on the door body 100 and the door frame 200 in a surrounding manner, and the sealing layers 300 respectively comprise a plurality of layers of plate-shaped structures 310 which are parallel to each other and are distributed in gaps. When the fire door is closed, the plate-like structures 310 of the sealing layer 300 on the door body 100 and the door frame 200 are interposed with each other with a gap left therebetween, forming a labyrinth ventilation gap 320. In the event of a fire, the plate-like structures 310 of the sealing layer 300 are deformable at high temperature, and the deformed plate-like structures 310 are pressed against each other, thereby blocking the labyrinth ventilation gaps 320 and preventing a large amount of smoke from passing through the fire door through the labyrinth ventilation gaps 320. Specifically, the plate-like structure 310 may be a thin steel plate or an aluminum plate, or may be a brass alloy plate, a high polymer plastic, a silicone rubber, or the like, which are all materials that are easily deformed at high temperature but are not flammable. In addition, it is contemplated that if the door body 100 and the door frame 200 are connected by a common hinge, the plate-like structure 310 of the sealing layer 300 near the side of the hinge of the fire door may need to have a certain curvature to match the opening and closing of the door body 100, which is conventional and obvious, and the present embodiment is not developed in detail.
As a further scheme of this embodiment: in order to ensure the structural strength of the sealing layer 300 even in daily use and avoid damage caused by accidental collision, the thickness and material of the plate-shaped structure 310 may not be limited, but a high-temperature deformable material, such as a polymer plastic, a silicone rubber, or the like, may be fixed on the surface of the plate-shaped structure 310. The plate-like structure 310 provides structural strength during normal use and the high temperature deformable material provides a seal in the event of a fire. The high temperature deformable material is preferably applied or adhered to the surface of the plate-like structure 310, which is low in cost, easy to replace and easy to recover after a fire.
As a further scheme of this embodiment: the door body 100 and the door frame 200 each comprise two sets of sealing layers 300, which are respectively arranged near the front side and the rear side of the door body 100. The door frame 200 is provided with an air extraction opening 210, and the air extraction opening 210 is located between two sets of sealing layers 300. Preferably, the air extraction opening 210 is communicated with a fresh air system of the building, and the negative pressure of the fresh air system is utilized to form the suction effect. The fresh air system is often provided with a suction device at the top of the building to suck and discharge air in the building, so that ventilation of the building is promoted. By adopting the technical scheme, when a fire disaster occurs, the sealing layer 300 at one side close to the fire disaster is sealed, and a small amount of smoke passing through the sealing layer 300 is directly sucked away by the air suction opening 210, so that the possibility that the smoke enters the other side of the fireproof door is eliminated. At ordinary times, the fresh air system can promote ventilation of the places on both sides of the fireproof door through the air extraction opening 210 of the door frame 200. The new trend system from taking of this scheme utilization building has improved flue gas isolation ability, prevents fire door simultaneously and has also promoted the ventilation in fire door both sides place indirectly.
As a further scheme of this embodiment: referring to fig. 6 and 7, a liquid receiving portion 110 is provided in the door body 100 or the door frame 200, the liquid receiving portion 110 is filled with liquid, and the liquid receiving portion 110 communicates with a sealing layer 300 at the top of the door body 100 or the door frame 200 through a passage 120. Preferably, the liquid is a viscous, nonflammable, non-evaporating liquid, such as a high viscosity insulating oil, a high temperature lubricating oil, and the like. By adopting the technical scheme, when a fire disaster occurs, liquid expands due to heating, overflows from the sealing layer 300 at the top of the door body 100 or the door frame 200, gradually spreads over the whole sealing layer 300 under the action of gravity and capillary effect, fills gaps in the sealing layer 300, and further isolates smoke and high temperature. Of course, the outlet of the passage 120 is not limited to the sealing layer 300 at the top of the door body 100 or the door frame 200, but may be the sealing layer 300 at other positions of the door body 100 or the door frame 200.
Further, in order to increase the speed of liquid overflow, an elastic air bag 130 may be provided in the liquid accommodating portion 110, and the elastic air bag 130 may be filled with a gas, and the gas may expand with an increase in temperature, thereby extruding the liquid. It is expected that when the temperature rises to a certain extent, the air bag may be broken by heat, and at this time a large amount of liquid has been discharged, the liquid sealing effect has been achieved, and there is no problem even if the air bag breaks.
The foregoing description of the preferred embodiments of the present invention should not be taken as limiting the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The civil air defense engineering fireproof door comprises a door body (100) and a door frame (200), and is characterized in that sealing layers (300) are arranged on the door body (100) and the door frame (200) in a surrounding mode, and the sealing layers (300) comprise a plurality of layers of plate-shaped structures (310) which are parallel to each other and distributed in a gap mode; when the fireproof door is closed, the plate-shaped structures (310) of the sealing layer (300) on the door body (100) and the door frame (200) are mutually inserted at intervals and leave gaps, so that labyrinth ventilation gaps (320) are formed; the plate-like structure (310) of the sealing layer (300) is deformable at high temperatures.
2. The civil air defense engineering fireproof door according to claim 1, wherein the plate-like structure (310) has a high temperature deformable material fixed to the surface.
3. The civil air defense engineering fireproof door according to claim 2, wherein the high temperature deformable material is fixed to the surface of the plate-like structure (310) by coating or pasting.
4. The civil air defense engineering fireproof door according to claim 1, wherein the door body (100) and the door frame (200) both comprise two groups of sealing layers (300) which are respectively arranged near the front side and the rear side of the door body (100); an air extraction opening (210) is formed in the door frame (200), and the air extraction opening (210) is located between the two groups of sealing layers (300).
5. The civil air defense engineering fireproof door according to claim 4, wherein the air extraction opening (210) is communicated with a building fresh air system.
6. The civil air defense engineering fireproof door according to claim 1, wherein a liquid containing part (110) is arranged in the door body (100) or the door frame (200), the liquid containing part (110) is filled with liquid, and the liquid containing part (110) is communicated with the sealing layer (300) at the top of the door body (100) or the door frame (200) through a channel (120).
7. The civil air defense engineering fireproof door according to claim 6, wherein an elastic air bag (130) is arranged in the liquid containing part (110), and the elastic air bag (130) is filled with gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311657281.3A CN117345090A (en) | 2023-12-06 | 2023-12-06 | Civil air defense engineering fireproof door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311657281.3A CN117345090A (en) | 2023-12-06 | 2023-12-06 | Civil air defense engineering fireproof door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117345090A true CN117345090A (en) | 2024-01-05 |
Family
ID=89367111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311657281.3A Pending CN117345090A (en) | 2023-12-06 | 2023-12-06 | Civil air defense engineering fireproof door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117345090A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948690A (en) * | 2006-11-09 | 2007-04-18 | 南京林业大学 | Double sealing structure of wooden fire proof door |
| KR101663462B1 (en) * | 2016-03-07 | 2016-10-07 | 박문규 | Fire door having fire emission structure |
| CN205918324U (en) * | 2016-07-01 | 2017-02-01 | 河南惠平意诺节能门窗有限公司 | Fireproof interior door |
| CN207315130U (en) * | 2017-09-14 | 2018-05-04 | 南京浦镇科技实业有限公司 | A kind of labyrinth type fire rated roller shutter sealing structure |
| CN207538717U (en) * | 2017-10-18 | 2018-06-26 | 安徽美林凯迪木业有限公司 | A kind of fire-proof smoke insulation door |
| CN209959121U (en) * | 2019-04-23 | 2020-01-17 | 天津市海达门业股份有限公司 | Prevent fire door and door frame with separate cigarette function |
| CN215255811U (en) * | 2021-01-12 | 2021-12-21 | 天津博迈科海洋工程有限公司 | Fireproof door structure of ocean oil and gas platform |
| CN215632571U (en) * | 2020-10-23 | 2022-01-25 | 杭州肴尚世科技有限公司 | A security protection door fire resistive construction for fire control passageway |
| CN215979097U (en) * | 2021-08-31 | 2022-03-08 | 浙江忠建消防科技有限公司 | Fire door is prevented with separating cigarette type in warehouse |
| CN216690874U (en) * | 2021-11-04 | 2022-06-07 | 江阴市强达装饰材料有限公司 | Fire door is prevented to safe seal type |
-
2023
- 2023-12-06 CN CN202311657281.3A patent/CN117345090A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948690A (en) * | 2006-11-09 | 2007-04-18 | 南京林业大学 | Double sealing structure of wooden fire proof door |
| KR101663462B1 (en) * | 2016-03-07 | 2016-10-07 | 박문규 | Fire door having fire emission structure |
| CN205918324U (en) * | 2016-07-01 | 2017-02-01 | 河南惠平意诺节能门窗有限公司 | Fireproof interior door |
| CN207315130U (en) * | 2017-09-14 | 2018-05-04 | 南京浦镇科技实业有限公司 | A kind of labyrinth type fire rated roller shutter sealing structure |
| CN207538717U (en) * | 2017-10-18 | 2018-06-26 | 安徽美林凯迪木业有限公司 | A kind of fire-proof smoke insulation door |
| CN209959121U (en) * | 2019-04-23 | 2020-01-17 | 天津市海达门业股份有限公司 | Prevent fire door and door frame with separate cigarette function |
| CN215632571U (en) * | 2020-10-23 | 2022-01-25 | 杭州肴尚世科技有限公司 | A security protection door fire resistive construction for fire control passageway |
| CN215255811U (en) * | 2021-01-12 | 2021-12-21 | 天津博迈科海洋工程有限公司 | Fireproof door structure of ocean oil and gas platform |
| CN215979097U (en) * | 2021-08-31 | 2022-03-08 | 浙江忠建消防科技有限公司 | Fire door is prevented with separating cigarette type in warehouse |
| CN216690874U (en) * | 2021-11-04 | 2022-06-07 | 江阴市强达装饰材料有限公司 | Fire door is prevented to safe seal type |
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|---|
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