CN110847782A - Prevent fire door with response function of putting out a fire - Google Patents
Prevent fire door with response function of putting out a fire Download PDFInfo
- Publication number
- CN110847782A CN110847782A CN201911184206.3A CN201911184206A CN110847782A CN 110847782 A CN110847782 A CN 110847782A CN 201911184206 A CN201911184206 A CN 201911184206A CN 110847782 A CN110847782 A CN 110847782A
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- China
- Prior art keywords
- fire
- door
- dry powder
- powder
- induction
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- 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.)
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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
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/14—Fire prevention, containment or extinguishing specially adapted for particular objects or places in connection with doors, windows, ventilators, partitions, or shutters, e.g. automatic closing
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- 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
- E06B5/161—Profile members 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
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Special Wing (AREA)
Abstract
The invention discloses a fireproof door with induction fire-extinguishing function, belonging to the technical field of fireproof doors, wherein an electromagnetic valve is controlled to be started by a built-in singlechip, compressed dry powder in a dry powder fire-extinguishing powder containing cavity in which the dry powder is arranged is released by the electromagnetic valve and sprayed to the inner side of a fixed plate by the electromagnetic valve, a one-way valve component is opened under high pressure, so that the dry powder is sprayed out to realize the fire-extinguishing function, meanwhile, an instant glass plate is melted at high temperature when a fire breaks out, a fire-extinguishing blasting component is popped out under the reaction force of a limiting spring and falls to the ground to enable the dry powder fire-extinguishing powder in the bottom assembly cover and the side assembly cavity to be crushed to be sprinkled down, so that the high-efficiency fire-extinguishing function is realized, the fire is extinguished by throwing the fire-extinguishing blasting component far away, the dry powder fire, thereby making it better to reduce losses.
Description
Technical Field
The invention relates to a fireproof door, in particular to a fireproof door with an induction fire extinguishing function, and belongs to the technical field of fireproof doors.
Background
The fire-proof test method is qualified according to the fire-proof test method of the national standard GB _12955 plus 2008 of fire-proof door implemented from 1 month and 1 day in 2009, and the fire-proof door certifications and the authorized identifiers are obtained by the ministry of economic standards, so that the fire-proof door is called as a fire-proof door, and the fire-proof door defined by the US NFPA and IBC specifications is a combination of any fire-proof door leaf, door jamb, hardware and other accessories which can jointly provide a certain degree of fire protection for an opening part.
A fire door is a door that can meet the requirements of fire stability, integrity and thermal insulation within a certain period of time. It is a fire-proof partition with certain fire resistance, which is arranged in fire-proof subareas, evacuation staircases, vertical shafts and the like.
The fireproof door has the functions of a common door, has the functions of preventing the fire from spreading and the smoke from diffusing, and can prevent the fire from spreading within a certain time to ensure the evacuation of people.
The fire door in the prior art can only simply play a role in stopping the spread of fire and cannot kill the fire, so that if the duration of the fire is longer, the fire door and the contents in the fire door can be burnt, and therefore the fire door with the induction fire-extinguishing function is invented.
Disclosure of Invention
The invention mainly aims to provide a fireproof door with an induction fire extinguishing function, when a fire disaster occurs, a large amount of smoke generated by high-temperature flame combustion is detected by a smoke alarm detector and then is sent to a built-in single chip microcomputer, an electromagnetic valve is controlled to be started by the built-in single chip microcomputer, compressed dry powder in a dry powder fire fighting powder containing cavity with the dry powder is released through the electromagnetic valve and is sprayed to the inner side of a fixing plate, a one-way valve component is opened under high pressure, so that the dry powder is sprayed out to realize the fire extinguishing function, meanwhile, an instant glass plate is melted at high temperature when the fire disaster occurs, the fire fighting blasting component is popped out under the reaction force of a limiting spring and falls to the ground to ensure that the dry powder fire fighting powder in a bottom assembly cover and a side assembly cavity is crushed to spill, the high-efficiency fire fighting function is realized, and the fire, the dry powder fire fighting in the cavity is placed nearby by spraying the dry powder fire fighting powder, and the isolation passive fire fighting in the prior art is converted into active fire fighting, so that the loss is better reduced.
The purpose of the invention can be achieved by adopting the following technical scheme:
a fireproof door with an induction fire extinguishing function comprises a door frame fixed with a wall body, wherein two ends of the inner side of the door frame are respectively hinged with a fire door, a placing cavity is respectively arranged above the front side of the fire door and above the back side of the fire door, a placing net frame is arranged on the inner side of the placing cavity, fire-fighting blasting components are arranged on the inner side of the placing net frame, an observation window is arranged on the fire door and below the placing cavity, check valve components are equidistantly arranged on the outer side of the observation window along the outer side of the observation window, a dry powder fire-fighting powder placing cavity is arranged on the inner side of the fire door and on the inner side of the observation window, an electromagnetic valve is arranged at the middle position of the outer side of the dry powder fire-fighting powder placing cavity, a side plate is arranged on the outer side of the dry powder fire-fighting powder, the outside of curb plate is equipped with the fixed plate, check valve subassembly with the inside intercommunication of fixed plate, the intermediate position department of fire door one side installs the lock, and is located the handle is installed to the below of lock, place the outside in chamber and install instant glass board.
Preferably, the speed regulator is installed to the end foot department at fire door one side top, just the top of speed regulator is installed can the first articulated rod of pivoted on the speed regulator, keep away from on the first articulated rod the one end of speed regulator articulates there is the second articulated rod, the second articulated rod is kept away from the one end of first articulated rod articulates on the door frame.
Preferably, check valve subassembly is including seting up on the fire door and with the opening of fixed plate intercommunication, the inboard cover of opening is equipped with the sealed check valve of opening, spacing spring is installed to the inboard bottom of opening, just spacing spring keeps away from in the opening the one end of bottom with the check valve face to one side welding of opening.
Preferably, place the inboard bottom of rack and all install spacing spring, just the fire control blasting unit mount be in place the rack and keep away from the one end of bottom in the spacing spring.
Preferably, the fire-fighting blasting assembly comprises a bottom assembly cover arranged at the bottom of the inner side of the net rack, a side assembly cavity is clamped at the top of the bottom assembly cover, an upper assembly cover is clamped at the top of the inner side of the side assembly cavity, and dry powder fire-fighting powder is arranged in a sealing cavity formed by the inner side of the upper assembly cover and the inner side of the side assembly cavity and the inner side of the bottom assembly cover.
Preferably, the fire door adopts the steel, just door frame adopts fire-retardant timber, install toughened glass on the observation window, and toughened glass with the fixed plate openly corresponds, the fixed plate with the curb plate all adopts transparent material.
Preferably, the outer side of the observation window is expanded outwards along the outer side to form a fixed frame, and the fixed frame is fixed with the fire door.
Preferably, the outer side of the handle is sleeved with a protective sleeve, and the outer side of the protective sleeve is provided with anti-skidding convex particles.
The invention has the beneficial technical effects that:
the invention provides a fireproof door with induction fire-extinguishing function, when fire occurs, a large amount of smoke generated by high-temperature flame combustion is detected by a smoke alarm detector, a signal is sent to a built-in single chip microcomputer, an electromagnetic valve is controlled to be started by the built-in single chip microcomputer, compressed dry powder in a dry powder fire-fighting powder containing cavity is released by the electromagnetic valve, the compressed dry powder is sprayed to the inner side of a fixed plate by the electromagnetic valve, a one-way valve component is opened under high pressure, so that the dry powder is sprayed out to realize the fire-extinguishing function, meanwhile, an instant glass plate is melted at high temperature when fire occurs, a fire-fighting blasting component is popped out under the reaction force of a limiting spring and falls to the ground to ensure that the dry powder fire-fighting powder in a bottom assembly cover and a side assembly cavity is crushed to spill, the high-efficiency fire-, the dry powder fire fighting in the cavity is placed nearby by spraying the dry powder fire fighting powder, and the isolation passive fire fighting in the prior art is converted into active fire fighting, so that the loss is better reduced.
Drawings
Figure 1 is a schematic perspective view of the entire apparatus of a preferred embodiment of a fire rated door with induction fire extinguishing function according to the present invention;
figure 2 is a schematic side cross-sectional perspective view of an apparatus in accordance with a preferred embodiment of the fire rated door with induction fire extinguishing in accordance with the present invention;
figure 3 is a schematic perspective view of a placement chamber of a preferred embodiment of a fire rated door with induction fire extinguishing according to the present invention;
figure 4 is an enlarged view of a preferred embodiment of a fire rated door having an induction fire extinguishing function according to the present invention at a;
figure 5 is an enlarged view of a preferred embodiment of a fire rated door having an induction fire extinguishing function according to the present invention at point B;
figure 6 is an enlarged view of a structure at C of a preferred embodiment of the fire rated door with induction fire extinguishing according to the present invention.
In the figure: 1-door frame, 2-speed regulator, 3-fire door, 4-placing cavity, 5-instant glass plate, 6-observation window, 7-one-way valve component, 8-handle, 9-door lock, 10-first hinged rod, 11-second hinged rod, 12-fire-fighting blasting component, 13-placing net rack, 14-smoke alarm detector, 15-electromagnetic valve, 16-dry powder fire-fighting powder placing cavity, 17-fixing plate, 18-one-way valve, 19-limiting spring, 20-through opening, 21-upper assembling cover, 22-dry powder fire-fighting powder, 23-side assembling cavity, 24-bottom assembling cover, 25-limiting spring and 26-side plate.
Detailed Description
In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1-6, the fire door with induction fire extinguishing function provided in this embodiment includes a door frame 1 fixed to a wall, fire doors 3 are respectively hinged to two ends of an inner side of the door frame 1, a placing cavity 4 is installed above a front surface of the fire door 3 and above a back surface of the fire door 3, a placing net frame 13 is installed inside the placing cavity 4, fire blasting assemblies 12 are all installed inside the placing net frame 13, an observation window 6 is installed on the fire door 3 and below the placing cavity 4, check valve assemblies 7 are installed along an outer side of the observation window 6 at equal intervals on an outer side of the observation window 6, a dry powder fire extinguishing powder placing cavity 16 is installed on an inner side of the fire door 3 and inside the observation window 6, an electromagnetic valve 15 is installed at a middle position of the outer side of the dry powder fire extinguishing powder placing cavity 16, a side plate 26 is installed on the outer side of the dry powder fire extinguishing powder placing cavity 16, and a smoke alarm, the outside of curb plate 26 is equipped with fixed plate 17, and check valve subassembly 7 and the inside intercommunication of fixed plate 17, the intermediate position department of fire door 3 one side installs lock 9, and is located the below of lock 9 and installs handle 8, and the outside of placing chamber 4 is installed instant glass board 5.
When a fire disaster occurs, high-temperature flame burns to generate a large amount of smoke, the smoke is detected by the smoke alarm detector 14 and then signals are sent to the built-in single chip microcomputer, the solenoid valve 15 is controlled to be started through the built-in single chip microcomputer, the compressed dry powder in the dry powder fire fighting powder placing cavity 16 which is internally provided with the dry powder is released through the solenoid valve 15 and is sprayed to the inner side of the fixed plate 17 through the solenoid valve 15, the check valve assembly 7 is opened under high pressure, the dry powder is sprayed out to achieve the fire extinguishing function, meanwhile, the instant glass plate 5 is melted at high temperature when the fire disaster occurs, the fire fighting blasting assembly 12 is popped out under the reaction force of the limiting spring 25, the dry powder fire fighting powder 22 falling to the ground to enable the bottom assembly cover 24 and the side assembly cavity.
In this embodiment, the speed regulator 2 is installed at the end foot of the top of one side of the fire-fighting door 3, and the first hinged rod 10 which can rotate on the speed regulator 2 is installed at the top of the speed regulator 2, the end of the first hinged rod 10 far away from the speed regulator 2 is hinged with the second hinged rod 11, and the end of the second hinged rod 11 far away from the first hinged rod 10 is hinged on the door frame 1.
Through driving second articulated pole 11 and rotating when pushing open the door, drive first articulated pole 10 through second articulated pole 11 and rotate, open the door for the inside speed governing that realizes of speed regulator 2 through first articulated pole 10.
In this embodiment, check valve subassembly 7 includes opening 20 that sets up on fire door 3 and communicate with fixed plate 17, and the inboard cover of opening 20 is equipped with one-way valve 18 with opening 20 is sealed, and spacing spring 19 is installed to the bottom of opening 20 inboard, and the one end that spacing spring 19 kept away from the bottom in opening 20 welds with one side that one-way valve 18 faced opening 20.
In this embodiment, the bottom of the inner side of the rack 13 is provided with a limit spring 25, and the fire fighting blasting component 12 is arranged at the end of the rack 13 far away from the bottom in the limit spring 25.
In this embodiment, the fire fighting blast assembly 12 includes a bottom assembly cover 24 placed at the bottom of the inner side of the rack 13, a side assembly cavity 23 is fastened to the top of the bottom assembly cover 24, an upper assembly cover 21 is fastened to the top of the inner side of the side assembly cavity 23, and dry powder fire fighting powder 22 is disposed in a sealing cavity formed by the inner side of the upper assembly cover 21 and the inner sides of the side assembly cavity 23 and the bottom assembly cover 24.
In this embodiment, the fire-fighting door 3 is made of steel, the door frame 1 is made of fire-retardant wood, the observation window 6 is provided with toughened glass, the toughened glass is in positive correspondence with the fixed plate 17, and the fixed plate 17 and the side plate 26 are made of transparent materials.
Install toughened glass through making on its observation window 6, and toughened glass openly corresponds with fixed plate 17, and fixed plate 17 and curb plate 26 all adopt transparent material can judge the memory space of its dry powder fire control powder placing cavity 16 inside.
In the present exemplary embodiment, the outer side of the observation window 6 is extended outward along its outer side to form a fixed frame, which is fixed to the fire door 3.
In this embodiment, the outer side of the handle 8 is sleeved with a protective sleeve, and the outer side of the protective sleeve is provided with anti-skid convex particles.
The above description is only for the purpose of illustrating the present invention and is not intended to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution of the present invention and its conception within the scope of the present invention.
Claims (8)
1. The utility model provides a prevent fire door with response function of putting out a fire which characterized in that: the fire-fighting door comprises a door frame (1) fixed with a wall body, fire doors (3) are respectively hinged to two ends of the inner side of the door frame (1), a placing cavity (4) is respectively arranged above the front side of each fire door (3) and above the back side of each fire door (3), a placing net rack (13) is arranged on the inner side of each placing cavity (4), fire-fighting blasting assemblies (12) are arranged on the inner sides of the placing net racks (13), observation windows (6) are arranged on the fire doors (3) and below the placing cavities (4), check valve assemblies (7) are equidistantly arranged on the outer sides of the observation windows (6) along the outer sides of the observation windows (6), dry powder fire-fighting powder placing cavities (16) are arranged on the inner sides of the fire doors (3) and on the inner sides of the observation windows (6), and electromagnetic valves (15) are arranged at the middle positions of the outer sides of the dry powder fire-fighting powder placing, curb plate (26) are installed in the outside that dry powder fire control powder placed chamber (16), just install smog alarm detector (14) on curb plate (26), the outside of curb plate (26) is equipped with fixed plate (17), check valve subassembly (7) with the inside intercommunication of fixed plate (17), door lock (9) are installed to the intermediate position department of fire control door (3) one side, and are located handle (8) are installed to the below of door lock (9), place the outside in chamber (4) and install instant glass board (5).
2. The fire door with an induction fire extinguishing function according to claim 1, characterized in that: speed regulator (2) are installed to the end foot department at fire door (3) one side top, just can be installed at the top of speed regulator (2) first articulated rod (10) of pivoted on speed regulator (2), keep away from on first articulated rod (10) the one end of speed regulator (2) articulates there is second articulated rod (11), keep away from second articulated rod (11) the one end of first articulated rod (10) articulates on door frame (1).
3. The fire door with an induction fire extinguishing function according to claim 1, characterized in that: check valve subassembly (7) are including seting up on fire door (3) and with opening (20) of fixed plate (17) intercommunication, the inboard cover of opening (20) is equipped with the sealed check valve (18) of opening (20), spacing spring (19) are installed to the bottom of opening (20) inboard, just spacing spring (19) are kept away from the one end of bottom in opening (20) with check valve (18) towards one side welding of opening (20).
4. The fire door with an induction fire extinguishing function according to claim 1, characterized in that: place rack (13) inboard bottom and all install spacing spring (25), just fire control blasting subassembly (12) are installed place rack (13) and keep away from the one end of bottom in spacing spring (25).
5. The fire door with an induction fire extinguishing function according to claim 1, characterized in that: fire control blasting subassembly (12) is including placing bottom equipment lid (24) of net rack (13) inboard bottom is placed, the top block of bottom equipment lid (24) has side equipment chamber (23), the inboard top block in side equipment chamber (23) has last equipment lid (21), the inboard of going up equipment lid (21) with side equipment chamber (23) with the sealed intracavity of the inboard constitution of bottom equipment lid (24) is equipped with dry powder fire control powder (22).
6. The fire door with an induction fire extinguishing function according to claim 1, characterized in that: fire door (3) adopt the steel, just door frame (1) adopts fire-retardant timber, install toughened glass on observation window (6), and toughened glass with fixed plate (17) openly correspond, fixed plate (17) with curb plate (26) all adopt transparent material.
7. The fire door with an induction fire extinguishing function according to claim 1, characterized in that: the outer side of the observation window (6) expands outwards along the outer side to form a fixed frame, and the fixed frame is fixed with the fire door (3).
8. The fire door with an induction fire extinguishing function according to claim 1, characterized in that: the outside cover of handle (8) is equipped with the lag, and the outside of this lag is equipped with anti-skidding convex grain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911184206.3A CN110847782A (en) | 2019-11-27 | 2019-11-27 | Prevent fire door with response function of putting out a fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911184206.3A CN110847782A (en) | 2019-11-27 | 2019-11-27 | Prevent fire door with response function of putting out a fire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110847782A true CN110847782A (en) | 2020-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911184206.3A Pending CN110847782A (en) | 2019-11-27 | 2019-11-27 | Prevent fire door with response function of putting out a fire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110847782A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734275A (en) * | 2020-06-04 | 2020-10-02 | 冯春伦 | High fire resistance's warning type prevents fire door |
| CN112746800A (en) * | 2021-01-17 | 2021-05-04 | 童立军 | Prevent fire door with automatic fire extinguishing function |
| CN113769291A (en) * | 2021-09-15 | 2021-12-10 | 陆秀兰 | High security fire rescue door |
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| JP2014043757A (en) * | 2012-08-24 | 2014-03-13 | Hidemasa Nohara | Crime-prevention/fire-protection door with energy conservation ventilation screen window |
| CN105484631A (en) * | 2015-12-25 | 2016-04-13 | 重庆钱珑门业有限责任公司 | Fireproof door |
| CN105625909A (en) * | 2014-10-29 | 2016-06-01 | 江苏盛阳消防门业有限公司 | Self-closed type fireproof door |
| CN106869724A (en) * | 2017-03-27 | 2017-06-20 | 浙江省现代建筑设计研究院有限公司 | A kind of Intelligent Measurement from put out a fire formula fire resistant doorsets |
| CN108756675A (en) * | 2018-06-24 | 2018-11-06 | 黄永锋 | A kind of intelligent fireproof door with fire-extinguishing function concurrently |
| CN108868512A (en) * | 2018-06-01 | 2018-11-23 | 苗娥 | A kind of smoking water spray fire resistant doorsets |
| CN109083576A (en) * | 2018-09-29 | 2018-12-25 | 湖州南浔郎小沐电子商务有限公司 | A kind of fire resistant doorsets of security protection |
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2019
- 2019-11-27 CN CN201911184206.3A patent/CN110847782A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014043757A (en) * | 2012-08-24 | 2014-03-13 | Hidemasa Nohara | Crime-prevention/fire-protection door with energy conservation ventilation screen window |
| CN105625909A (en) * | 2014-10-29 | 2016-06-01 | 江苏盛阳消防门业有限公司 | Self-closed type fireproof door |
| CN105484631A (en) * | 2015-12-25 | 2016-04-13 | 重庆钱珑门业有限责任公司 | Fireproof door |
| CN106869724A (en) * | 2017-03-27 | 2017-06-20 | 浙江省现代建筑设计研究院有限公司 | A kind of Intelligent Measurement from put out a fire formula fire resistant doorsets |
| CN108868512A (en) * | 2018-06-01 | 2018-11-23 | 苗娥 | A kind of smoking water spray fire resistant doorsets |
| CN108756675A (en) * | 2018-06-24 | 2018-11-06 | 黄永锋 | A kind of intelligent fireproof door with fire-extinguishing function concurrently |
| CN109083576A (en) * | 2018-09-29 | 2018-12-25 | 湖州南浔郎小沐电子商务有限公司 | A kind of fire resistant doorsets of security protection |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734275A (en) * | 2020-06-04 | 2020-10-02 | 冯春伦 | High fire resistance's warning type prevents fire door |
| CN112746800A (en) * | 2021-01-17 | 2021-05-04 | 童立军 | Prevent fire door with automatic fire extinguishing function |
| CN113769291A (en) * | 2021-09-15 | 2021-12-10 | 陆秀兰 | High security fire rescue door |
| CN113769291B (en) * | 2021-09-15 | 2022-10-25 | 上海申丰地质新技术应用研究所有限公司 | High security fire rescue door |
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