CN110836077A - Self-triggering type fireproof roller shutter - Google Patents
Self-triggering type fireproof roller shutter Download PDFInfo
- Publication number
- CN110836077A CN110836077A CN201911120342.6A CN201911120342A CN110836077A CN 110836077 A CN110836077 A CN 110836077A CN 201911120342 A CN201911120342 A CN 201911120342A CN 110836077 A CN110836077 A CN 110836077A
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- CN
- China
- Prior art keywords
- fire
- wall
- curtain
- chamber
- outlet duct
- 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.)
- Granted
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Classifications
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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
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/005—Delivery of fire-extinguishing material using nozzles
-
- 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
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
- E06B9/08—Roll-type closures
-
- 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
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/68—Operating devices or mechanisms, e.g. with electric drive
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
- A62C99/0027—Carbon dioxide extinguishers
Abstract
The invention discloses a self-triggering type fireproof roller shutter which comprises a winding rod fixedly connected to the side wall of a wall body, wherein a fireproof curtain is wound on the side wall of the winding rod, the lower end of the fireproof curtain is fixedly connected with a mounting plate, the side walls, close to two ends, of the mounting plate are respectively provided with a triggering mechanism, fire extinguishing mechanisms are respectively arranged inside two sides of the wall body and comprise a water storage cavity, a gas storage cavity and an adjusting cavity which are arranged inside the wall body, the water storage cavity is communicated with the adjusting cavity through a water suction pipe, a first one-way valve is arranged in the water suction pipe, the gas storage cavity is communicated with the adjusting cavity through a gas inlet pipe, a second one-way valve is arranged in the gas inlet pipe, a temperature controller is embedded in the upper wall of the adjusting cavity, an electromagnetic plate is fixedly connected to the upper wall. The invention can prevent the fire from spreading to other areas, brings great convenience to the fire extinguishing work, and has double fire extinguishing measures to ensure better fire extinguishing effect.
Description
Technical Field
The invention relates to the technical field of fireproof equipment, in particular to a self-triggering fireproof roller shutter.
Background
In the real life, all places can often break out the fire, cause very big threat to people's property safety and personal safety, so, people are in order to reduce the harm that the conflagration caused, a series of equipment has been made, these equipment can both play critical effect when preventing fires and fighting fires, however, current fire prevention fire fighting equipment generally is when the conflagration takes place, reduce the effect of the intensity of a fire, the function that can keep apart the fire scene does not exist, if rescue untimely, the intensity of a fire spreads other regions easily, cause more serious consequence, so, need design the equipment that can keep apart the fire scene and solve above-mentioned problem.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a self-triggering fireproof rolling curtain.
In order to achieve the purpose, the invention adopts the following technical scheme:
a self-triggering fireproof roller shutter comprises a winding rod fixedly connected to the side wall of a wall body, a fireproof curtain is wound on the side wall of the winding rod, the lower end of the fireproof curtain is fixedly connected with a mounting plate, the side wall of the mounting plate, which is close to two ends, is provided with a triggering mechanism, fire extinguishing mechanisms are arranged inside two sides of the wall body respectively, each fire extinguishing mechanism comprises a water storage cavity, a gas storage cavity and an adjusting cavity which are arranged inside the wall body, the water storage cavity is communicated with the adjusting cavity through a water suction pipe, a first one-way valve is arranged in the water suction pipe, the gas storage cavity is communicated with the adjusting cavity through a gas inlet pipe, a second one-way valve is arranged in the gas inlet pipe, a temperature controller is embedded in the upper wall of the adjusting cavity, the upper wall of the adjusting cavity is fixedly connected with an electromagnetic plate, the lower wall of the electromagnetic plate is elastically connected with a magnetic sliding plug through a, inside running through of magnetism sliding plug is equipped with the bar copper, the inner wall of adjusting the chamber both sides inlays and is equipped with the copper, temperature controller, electromagnetism board and two copper pass through the wire and establish ties, it has two baffles to adjust the chamber bottom through pressure spring elastic connection, it is equipped with main outlet pipe and main outlet duct to adjust the chamber lateral wall intercommunication, and main outlet pipe all runs through the winding stem and extend to the fire prevention curtain with main outlet duct in, main outlet pipe is close to and adjusts chamber one end and is equipped with first pressure valve, main outlet duct is close to and adjusts chamber one end and is equipped with the second pressure valve, main outlet duct is located the inside lateral wall intercommunication of fire prevention curtain and is equipped with a plurality of vice outlet pipes, main outlet duct is located the inside lateral wall intercommunication of fire prevention curtain and is equipped with vice outlet duct, vice outlet duct all.
Preferably, trigger mechanism is including setting up the installation cavity in the wall body, there is the magnetic path installation cavity bottom through memory metal piece elastic connection, the mounting panel is just being equipped with the standing groove to the lateral wall of magnetic path, the standing groove lateral wall has the iron plate through reset spring elastic connection, and the iron plate runs through the wall body lateral wall and extends to in the installation cavity.
Preferably, the auxiliary air outlet pipe and the auxiliary water outlet pipe are rubber hoses, an air nozzle is arranged on the side wall of the auxiliary air outlet pipe, which is positioned outside the fireproof curtain, and a water nozzle is arranged on the side wall of the auxiliary water outlet pipe, which is positioned outside the fireproof curtain.
The invention has the following beneficial effects:
1. the fire extinguishing device is provided with the trigger mechanism, so that the memory metal sheet can be deformed at high temperature to push the magnetic block away from the iron block when a fire disaster occurs, the iron block returns to the placing groove under the pulling force of the reset spring, the mounting plate drives the fire-proof curtain to move downwards, a fire scene can be isolated in time, the fire is prevented from spreading to other areas, and great convenience is brought to fire extinguishing work;
2. the fire extinguishing device is provided with the fire extinguishing mechanism, carbon dioxide is expanded through high temperature, the magnetic sliding plug moves downwards, the electromagnetic plate generates magnetism through an external circuit of the temperature controller, the magnetic sliding plug is attracted to move upwards, the operation is repeated, water in the water storage cavity is pumped into the adjusting cavity and then is extruded into the main water outlet pipe, and the water is sprayed out through the auxiliary water outlet pipe, so that the fire extinguishing effect can be timely played, and the fire is prevented from being further expanded;
3. the invention can pump the carbon dioxide gas in the gas storage cavity into the adjusting cavity and extrude the carbon dioxide gas into the main gas outlet pipe while the magnetic sliding plug moves up and down, and then the carbon dioxide gas is sprayed out through the gas nozzle of the auxiliary gas outlet pipe, and the carbon dioxide can also play a role in fire extinguishing, and the double fire extinguishing measures are matched with the water sprayed out by the water spray nozzle, so that the fire extinguishing effect is better.
Drawings
FIG. 1 is a schematic structural view of a self-triggering fire-proof rolling shutter according to the present invention;
FIG. 2 is a schematic structural view of a self-triggering fire-proof rolling shutter according to the present invention when not in use;
fig. 3 is an enlarged view of the structure at the point a of the self-triggering fire-proof rolling shutter according to the present invention.
In the figure: 1 wall body, 2 water storage cavities, 3 memory metal sheets, 4 magnetic blocks, 5 return springs, 6 fire curtains, 7 mounting plates, 8 placing grooves, 9 iron blocks, 10 mounting cavities, 11 water suction pipes, 12 gas storage cavities, 13 main water outlet pipes, 14 winding rods, 15 auxiliary air outlet pipes, 16 auxiliary water outlet pipes, 17 electromagnetic plates, 18 main air outlet pipes, 19 first pressure valves, 20 first check valves, 21 adjusting cavities, 22 magnetic sliding plugs, 23 tension springs, 24 copper bars, 25 copper plates, 26 second check valves, 27 air inlet pipes, 28 temperature controllers, 29 second pressure valves and 30 baffle plates.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-3, a self-triggering fire-proof roller shutter comprises a winding rod 14 fixedly connected to the side wall of a wall 1, a fire-proof curtain 6 wound around the side wall of the winding rod 14, and a mounting plate 7 fixedly connected to the lower end of the fire-proof curtain 6.
The lateral wall that mounting panel 7 is close to both ends all is equipped with trigger mechanism, trigger mechanism is including setting up the installation cavity 10 in wall body 1, there is magnetic path 4 installation cavity 10 bottom through 3 elastic connection of memory sheetmetal, memory sheetmetal 3 is the heliciform under normal temperature, when ambient temperature risees and reachs its abnormal temperature, can extend into the strip, mounting panel 7 is just being equipped with standing groove 8 to the lateral wall of magnetic path 4, 8 lateral walls of standing groove have iron plate 9 through 5 elastic connection of reset spring, and iron plate 9 runs through 1 lateral wall of wall body and extends to in the installation cavity 10.
Inside fire extinguishing mechanism that all is equipped with in 1 both sides of wall body, fire extinguishing mechanism is including setting up at 1 inside water storage chamber 2 of wall body, gas storage chamber 12 and regulation chamber 21, water storage chamber 2 is through 11 and the regulation chamber 21 intercommunication that absorb water, the pipe 11 one end of keeping away from regulation chamber 21 that absorbs water extends to 2 bottoms in water storage chamber, it is equipped with first check valve 20 to absorb water intraductal, first check valve 20 only allows water to get into from the pipe 11 that absorbs water and adjusts chamber 21, gas storage chamber 12 passes through intake pipe 27 and the intercommunication of regulation chamber 21, be equipped with second check valve 26 in the intake pipe 27, second check valve 26 restriction gas can only follow intake pipe 27 inflow regulation chamber 21.
The temperature controller 28 is embedded in the upper wall of the adjusting cavity 21, the temperature controller 28 can conduct an external circuit when the ambient temperature reaches a critical value, the upper wall of the adjusting cavity 21 is fixedly connected with an electromagnetic plate 17, the electromagnetic plate 17 can generate magnetism when being electrified, the lower wall of the electromagnetic plate 17 is elastically connected with a magnetic sliding plug 22 through a tension spring 23, the magnetic sliding plug 22 and the electromagnetic plate 17 attract each other in a heteropolar way, the magnetic sliding plug 22 is connected with the side wall of the adjusting cavity 21 in a sealing and sliding way, carbon dioxide is filled in the upper end of the magnetic sliding plug 22 and the gas storage cavity 12, a copper rod 24 is arranged in the magnetic sliding plug 22 in a penetrating way, copper plates 25 are embedded in the inner walls of the two sides of the adjusting cavity 21, the temperature controller 28, the electromagnetic plate 17 and the two copper plates 25 are connected in series through conducting wires, the bottom of the adjusting cavity 21 is elastically connected with two baffles 30 through a pressure spring, the side wall of the adjusting cavity 21 is communicated with a main water outlet pipe 13 and a main water outlet pipe 18, the main water outlet pipe 13 and the main water outlet pipe 18 penetrate through the winding rod 14 and extend into the fire curtain 6, one end, close to the adjusting cavity 21, of the main water outlet pipe 13 is provided with a first pressure valve 19, the first pressure valve 19 can be opened when the water pressure reaches a critical value, all water in the adjusting cavity 21 is sprayed out, one end, close to the adjusting cavity 21, of the main water outlet pipe 18 is provided with a second pressure valve 29, the second pressure valve can be opened when the air pressure reaches the critical value, all gas in the adjusting cavity 21 is sprayed out, the side wall, located inside the fire curtain 6, of the main water outlet pipe 13 is communicated with a plurality of auxiliary water outlet pipes 16, the side wall, located inside the fire curtain 6, of the main water outlet pipe 18 is communicated with an auxiliary air outlet.
In the invention, the auxiliary air outlet pipe 15 and the auxiliary water outlet pipe 16 are both rubber hoses which can be wound on the winding rod 14 along with the fire-proof curtain 6, the side wall of the auxiliary air outlet pipe 15, which is positioned outside the fire-proof curtain 6, is provided with an air nozzle, and the side wall of the auxiliary water outlet pipe 16, which is positioned outside the fire-proof curtain 6, is provided with a water nozzle.
In the invention, under normal conditions, the device does not work, the fire-proof curtain 6 is wound on the winding rod 14, when a fire disaster occurs, the temperature rises to reach the metamorphosis temperature of the memory metal sheet 3, the memory metal sheet 3 extends into a strip shape and drives the magnetic block 4 to move upwards, so that the magnetic block 4 and the iron block 9 are dislocated, the iron block 9 is pulled back into the placing groove 8 by the return spring 5, the mounting plate 7 moves downwards under the action of gravity, so that the fire-proof curtain 6 is pulled out from the side wall of the winding rod 14, the fire disaster place is isolated, and the fire spread is prevented.
When a fire occurs, the temperature rises, the temperature controller 28 reaches a critical value, the circuit is conducted, the carbon dioxide at the upper end of the regulating cavity 21 is heated to expand, the force of the expansion of the carbon dioxide is not enough to open the second pressure valve 29, so that the magnetic sliding plug 22 is pushed to move downwards, the magnetic sliding plug 22 moves to the lower end, the baffle 30 is squeezed, the baffle 30 moves downwards, the copper rod 24 can be in contact with the copper plate 25 after the baffle 30 moves downwards, and air at the lower end of the magnetic sliding plug 22 is squeezed into the main water outlet pipe 13, when the copper rod 24 is in contact with the copper plate 25, the external circuit of the temperature controller 28 is conducted, the electromagnetic plate 17 generates magnetism, and it is noted that the attraction force of the electromagnetic plate 17 and the magnetic sliding plug 22 is far greater than the force of the expansion of the carbon dioxide, so that the magnetic sliding plug 22 moves upwards rapidly, even if the copper rod 24 leaves the copper plate 25, the magnetic sliding plug 22 continues to move upwards due, and the carbon dioxide at the upper end of the magnetic sliding plug 22 is extruded into the main air outlet pipe 18, meanwhile, the air pressure at the lower end of the magnetic sliding plug 22 is smaller than the external normal air pressure, water in the water storage cavity 2 can be sucked into the lower end of the magnetic sliding plug 22 through the water inlet pipe 11, after the carbon dioxide at the upper end of the magnetic sliding plug 22 is sprayed out by the second pressure valve 29, the carbon dioxide in the air storage cavity 12 enters the adjusting cavity 21 for supplementation, the magnetic sliding plug 22 is pushed downwards to move by thermal expansion, the water at the lower end of the magnetic sliding plug 22 is extruded into the main water outlet pipe 13, the operation is repeated, the magnetic sliding plug 22 reciprocates up and down, and the water and the carbon dioxide are respectively extruded into the.
Water can flow into the auxiliary water outlet pipe 16 after entering the main water outlet pipe 13 and is sprayed out from the water spray nozzle, so that the fire extinguishing effect can be achieved, carbon dioxide can enter the auxiliary air outlet pipe 15 after entering the main air outlet pipe 18 and is sprayed out from the air spray nozzle, and the fire extinguishing effect is better.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. The utility model provides a from triggering formula fire prevention roller shutter, includes that fixed connection is at winding rod (14) of wall body (1) lateral wall, winding rod (14) lateral wall winding is equipped with fire prevention curtain (6), its characterized in that: the fire curtain (6) lower extreme fixedly connected with mounting panel (7), the lateral wall that mounting panel (7) is close to both ends all is equipped with trigger mechanism, the inside mechanism of putting out a fire that all is equipped with in wall body (1) both sides, put out a fire the mechanism including setting up water storage chamber (2), gas storage chamber (12) and regulation chamber (21) inside wall body (1), water storage chamber (2) are through absorbing water pipe (11) and regulation chamber (21) intercommunication, be equipped with first check valve (20) in absorbing water pipe (11), gas storage chamber (12) are through intake pipe (27) and regulation chamber (21) intercommunication, be equipped with second check valve (26) in intake pipe (27), regulation chamber (21) upper wall inlays and is equipped with temperature controller (21) upper wall fixedly connected with electromagnetic plate (17), electromagnetic plate (17) have magnetism sliding plug (22) through extension spring (23) elastic connection, and the heteropolarity of magnetism sliding plug (22) and electromagnetic plate (17) is inhaled mutually, all pack with the gas storage chamber (12) in magnetism sliding plug (22) upper end, inside running through of magnetism sliding plug (22) is equipped with bar copper (24), the inner wall of adjusting chamber (21) both sides inlays and is equipped with copper (25), temperature controller (28), electromagnetic plate (17) and two copper (25) are established ties through the wire, it has two baffles (30) to adjust chamber (21) bottom through pressure spring elastic connection, it is equipped with main outlet duct (13) and main outlet duct (18) to adjust chamber (21) lateral wall intercommunication, and main outlet duct (13) and main outlet duct (18) all run through winding rod (14) and extend to in fire curtain (6), main outlet duct (13) are close to and adjust chamber (21) one end and are equipped with first pressure valve (19), main outlet duct (18) are close to adjusting chamber (21) one end and are equipped with second pressure valve (29), the main water outlet pipe (13) is located the inside lateral wall intercommunication of fire prevention curtain (6) and is equipped with a plurality of vice outlet pipes (16), main outlet duct (18) is located the inside lateral wall intercommunication of fire prevention curtain (6) and is equipped with vice outlet duct (15), vice outlet duct (16) all extend to outside fire prevention curtain (6) with vice outlet duct (15).
2. A self-triggering fire protection rolling shutter as defined in claim 1, wherein: trigger mechanism is including setting up installation cavity (10) in wall body (1), installation cavity (10) bottom has magnetic block (4) through memory sheetmetal (3) elastic connection, mounting panel (7) just are equipped with standing groove (8) to the lateral wall of magnetic block (4), standing groove (8) lateral wall has iron plate (9) through reset spring (5) elastic connection, and iron plate (9) run through wall body (1) lateral wall and extend to in installation cavity (10).
3. A self-triggering fire protection rolling shutter as defined in claim 1, wherein: the fire-proof curtain is characterized in that the auxiliary air outlet pipe (15) and the auxiliary water outlet pipe (16) are both rubber hoses, an air nozzle is arranged on the side wall of the auxiliary air outlet pipe (15) located outside the fire-proof curtain (6), and a water nozzle is arranged on the side wall of the auxiliary water outlet pipe (16) located outside the fire-proof curtain (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911120342.6A CN110836077B (en) | 2019-11-15 | 2019-11-15 | Self-triggering type fireproof roller shutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911120342.6A CN110836077B (en) | 2019-11-15 | 2019-11-15 | Self-triggering type fireproof roller shutter |
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| Publication Number | Publication Date |
|---|---|
| CN110836077A true CN110836077A (en) | 2020-02-25 |
| CN110836077B CN110836077B (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911120342.6A Active CN110836077B (en) | 2019-11-15 | 2019-11-15 | Self-triggering type fireproof roller shutter |
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| CN (1) | CN110836077B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577104A (en) * | 2020-05-23 | 2020-08-25 | 张和裕 | Self-triggering fireproof rolling shutter door with good safety |
| CN111659062A (en) * | 2020-05-16 | 2020-09-15 | 郑州神宇防火制品有限公司 | Opening structure, fire extinguishing device, fire-proof window and production process of fire-proof window |
| CN111764802A (en) * | 2020-07-09 | 2020-10-13 | 图庆扎布 | Fireproof rolling shutter door |
| CN111991735A (en) * | 2020-09-08 | 2020-11-27 | 黄族辉 | Indoor self-excitation type intelligent fire-fighting equipment |
| CN112127776A (en) * | 2020-09-22 | 2020-12-25 | 王伦 | Aluminum alloy door with fireproof function |
| CN115012796A (en) * | 2022-05-21 | 2022-09-06 | 施翔 | Security protection rolling slats door |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659062A (en) * | 2020-05-16 | 2020-09-15 | 郑州神宇防火制品有限公司 | Opening structure, fire extinguishing device, fire-proof window and production process of fire-proof window |
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| CN111577104A (en) * | 2020-05-23 | 2020-08-25 | 张和裕 | Self-triggering fireproof rolling shutter door with good safety |
| CN111764802A (en) * | 2020-07-09 | 2020-10-13 | 图庆扎布 | Fireproof rolling shutter door |
| CN111991735A (en) * | 2020-09-08 | 2020-11-27 | 黄族辉 | Indoor self-excitation type intelligent fire-fighting equipment |
| CN111991735B (en) * | 2020-09-08 | 2022-01-04 | 黄族辉 | Indoor self-excitation type intelligent fire-fighting equipment |
| CN112127776A (en) * | 2020-09-22 | 2020-12-25 | 王伦 | Aluminum alloy door with fireproof function |
| CN115012796A (en) * | 2022-05-21 | 2022-09-06 | 施翔 | Security protection rolling slats door |
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| Publication number | Publication date |
|---|---|
| CN110836077B (en) | 2020-11-20 |
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