CN212957143U - Fire protection device for external thermal insulation material of high-rise building curtain wall - Google Patents
Fire protection device for external thermal insulation material of high-rise building curtain wall Download PDFInfo
- Publication number
- CN212957143U CN212957143U CN202021431681.4U CN202021431681U CN212957143U CN 212957143 U CN212957143 U CN 212957143U CN 202021431681 U CN202021431681 U CN 202021431681U CN 212957143 U CN212957143 U CN 212957143U
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- supporting frame
- water pipe
- fire
- curtain wall
- 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.)
- Active
Links
Images
Landscapes
- Fire Alarms (AREA)
Abstract
The utility model belongs to the technical field of curtain walls, in particular to a fire-proof device for external thermal insulation materials of high-rise building curtain walls, which comprises a whole device, a clean water pipe, a supporting frame and an alarm, wherein the supporting frame is fixedly connected in the middle of the whole device, a sewage pipe is connected in one side of the supporting frame in a penetrating way, the clean water pipe is fixedly connected in the middle of the inner part of the sewage pipe, a branch water pipe is fixedly connected on the other side of the clean water pipe, the bottom of the branch water pipe is fixedly connected with an adjusting valve, the adjusting valve is controlled by a control circuit board, so when the flame sensor does not sense the flame brightness, the control circuit board closes the adjusting valve according to an electric signal transmitted by the flame sensor, then the residual sewage in the closed space is discharged to the sewage pipe through a water outlet, thereby a fire extinguishing mechanism, the fire extinguishing mechanism can better utilize water to extinguish fire, and has wide application prospect in the future.
Description
Technical Field
The utility model belongs to the technical field of the curtain, specifically be an outer insulation material fire prevention device of high-rise building curtain.
Background
In recent years, several high-rise building fires are caused by external wall heat-insulating materials, such as: the new site fire of Beijing central television station in 2009, the teacher apartment fire in Shanghai in 2010, the Shenyang Huang dynasty in 2011, the Wanxin mansion fire, and the like. The building curtain wall external thermal insulation material and the building curtain wall structure provide important ways for the rapid spread of the fire disasters. The modern high-rise building mostly adopts the building curtain wall as exterior decoration, the building area of the building curtain wall reaches about 700 ten thousand square meters every year in China at present, and the market prospect is still good. The construction boundary at home and abroad disputes the situation, and the clear text of the countries such as Japan, Germany and the like prohibits the use. The reason is that the hollow structure in the vertical direction inside the curtain wall material of the high-rise building is like a high-rise chimney when a fire disaster happens, and becomes an important way for rapidly spreading the fire, and the curtain wall falls down after reaching the fire resistance limit after people are evacuated frequently, so that the safety of people is seriously influenced.
At present, use among the firebreak device to put out a fire the mechanism and all put out a fire through carbon dioxide, but carbon dioxide's preparation process is comparatively complicated, also produces the external world easily during the discharge in addition and pollutes, so lead to firebreak device's the cost of putting out a fire too big, when the enclosure space of building curtain damaged the structure, also can be because of the building curtain is too high and can't accurately find corresponding enclosure space and in time maintain and produce the circumstances that the back can't be used of putting out a fire.
Therefore, how to design a fireproof device of an external thermal insulation material of a high-rise building curtain wall becomes a problem which needs to be solved currently.
Disclosure of Invention
The utility model aims to provide a: in order to solve the problems of high fire extinguishing cost and incapability of timely maintenance, the fire protection device for the outer thermal insulation material of the curtain wall of the high-rise building is provided.
In order to achieve the above object, the utility model provides a following technical scheme:
a fire protection device for a curtain wall external thermal insulation material of a high-rise building comprises a device body, a clean water pipe, a supporting frame and an alarm, wherein the supporting frame is fixedly connected in the middle of the device body, a sewage pipe is connected to one side of the supporting frame in a penetrating manner, the clean water pipe is fixedly connected in the middle of the inner part of the sewage pipe, a branch water pipe is fixedly connected to the other side of the clean water pipe, an adjusting valve is fixedly connected to the bottom of the branch water pipe, a water outlet is fixedly connected to the bottom of the adjusting valve, a closed space is fixedly connected to the inner part of the supporting frame, a curtain wall external decorative material is movably connected to one side of the supporting frame, a thermal insulation layer is fixedly connected to the other side of the supporting frame, a building structure wall is fixedly connected to the other side of the thermal, the top of the other side of the inside of the supporting frame is fixedly connected with a transmitter, and the middle of the other side of the inside of the supporting frame is fixedly connected with a receiver.
Preferably, the other side of the sewage pipe is fixedly connected with a water outlet.
Preferably, a flame sensor is fixedly connected to the bottom of the other side inside the supporting frame.
Preferably, the other side of the support frame is fixedly connected with a fireproof plate.
Preferably, the sewage pipe and the clear water pipe in the middle of the inside of the sewage pipe, the branch water pipe on the other side of the clear water pipe, the regulating valve at the bottom of the branch water pipe, the water outlet at the bottom of the regulating valve and the control circuit board at the top inside the supporting frame jointly form a fire extinguishing mechanism.
Preferably, the alarm, the control circuit board at the top inside the supporting frame, the emitter at the top of the other side inside the supporting frame and the receiver in the middle of the other side inside the supporting frame form a positioning mechanism together.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses in, the mechanism of putting out a fire, control electrode board and flame sensor make the mechanism of putting out a fire carry out corresponding water and spout according to flame (height) size and put out a fire for the mechanism of putting out a fire can better utilize water to put out a fire, and water is the resource commonly used simultaneously, thereby the cost when the device that significantly reduces wholly uses.
2. The utility model discloses in, positioning mechanism, can remind respectively when not having signal of telecommunication connection between control circuit board (location) and the control terminal (warning), let the user in time know that the enclosure's of that connection produces the disconnection, so the alarm has played the effect of a location, has avoided the user can't in time find the condition of damaging the enclosure, has also avoided leading to the unable normal use's of mechanism of putting out a fire condition because of unable in time maintenance.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a side plan structure of the support frame of the present invention;
FIG. 3 is a schematic diagram of an enlarged structure at A of the present invention;
fig. 4 is a schematic diagram of the overall process of the present invention.
In the figure: 1. the device comprises a whole body, 2, a curtain wall exterior material, 3, a building structure wall, 4, a heat insulation layer, 5, a clean water pipe, 6, a sewage pipe, 7, a supporting frame, 8, a regulating valve, 9, a water outlet, 10, an alarm, 11, a water outlet, 12, a branch water pipe, 13, a closed space, 14, a control circuit board, 15, a flame sensor, 16, a transmitter, 17, a receiver, 18 and a fireproof plate.
Detailed Description
The technical solution 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 some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
In a first embodiment, please refer to fig. 1-4, the present invention provides a technical solution: a fire protection device for a curtain wall external thermal insulation material of a high-rise building comprises a device body 1, a clean water pipe 5, a supporting frame 7 and an alarm 10, wherein the supporting frame 7 is fixedly connected in the middle of the device body 1, a sewage pipe 6 is connected to one side of the supporting frame 7 in a penetrating manner, the clean water pipe 5 is fixedly connected in the middle of the inner part of the sewage pipe 6, a branch water pipe 12 is fixedly connected to the other side of the clean water pipe 5, an adjusting valve 8 is fixedly connected to the bottom of the branch water pipe 12, a water outlet 9 is fixedly connected to the bottom end of the adjusting valve 8, a closed space 13 is fixedly connected to the inner part of the supporting frame 7, a curtain wall external decorative material 2 is movably connected to one side of the supporting frame 7, a thermal insulation layer 4 is fixedly connected to the other side of the supporting frame 7, a building structure wall 3 is fixedly connected to, the top of the other side of the inside of the supporting frame 7 is fixedly connected with a transmitter 16, and the middle of the other side of the inside of the supporting frame 7 is fixedly connected with a receiver 17.
Preferably, the other side of the sewage pipe 6 is fixedly connected with the water outlet 11, when the fire extinguishing mechanism at the top of the closed space 13 extinguishes the fire, the fire-extinguished sewage remains at the bottom of the closed space 13, so as to avoid the sewage from accumulating in the closed space 13, the water outlet 11 is arranged at the bottom of the closed space 13, and the bottom end of the water outlet 11 is directly connected with the sewage pipe 6, so that the closed space 13 flows into the sewage pipe 6, and the water outlet 11 is inclined as a whole, so that the sewage in the closed space 13 can be better discharged to the sewage pipe 6 through the water outlet 11.
Preferably, the bottom of the other side inside the supporting frame 7 is fixedly connected with a flame sensor 15, the flame sensor 15 utilizes the characteristic that infrared rays are very sensitive to flames, the flame sensor 15 detects flames through an infrared receiving tube specially made inside, then the brightness of the flames is converted into electric signals with variable heights, the converted electric signals are transmitted to the inside of the control circuit board 14 by the flame sensor 15, and corresponding program processing is carried out by the control circuit board 14 according to the change of the electric signals, so that the setting of the flame sensor 15 is convenient for the control circuit board 14 to better extinguish the fire inside the closed space 13.
Preferably, the other side fixedly connected with PLASTIC LAMINATED 18 of braced frame 7, in order to avoid flame sensor 15 directly to be caused by the produced fire of heat preservation 4 and damage, so be equipped with PLASTIC LAMINATED 18 between flame sensor 15 and heat preservation 4, because of the coefficient of heat conductivity of PLASTIC LAMINATED 18 is very little, this makes the heat migration slow, the condition of fire to flame sensor 15 transmission from the fire of heat preservation 4 department has been avoided, simultaneously in PLASTIC LAMINATED 18, fire extinguishing mechanism can play the effect of putting out a fire, then just fine has played better guard action to flame sensor 15.
Preferably, the sewage pipe 6, the clean water pipe 5 in the middle of the inside of the sewage pipe 6, the branch water pipe 12 at the other side of the clean water pipe 5, the adjusting valve 8 at the bottom of the branch water pipe 12, the water outlet 9 at the bottom end of the adjusting valve 8 and the control circuit board 14 at the top of the inside of the supporting frame 7 jointly form a fire extinguishing mechanism, when the flame sensor 15 senses the flame brightness generated in the closed space 13, an electric signal is transmitted to the control circuit board 14, the control circuit board 14 opens the adjusting valve 8 when receiving the electric signal, wherein the clean water pipe 5 guides the branch water pipe 12 for a long time, so that when the adjusting valve 8 opens, the clean water at the branch water pipe 12 flows out to the water outlet 9 through the adjusting valve 8 and sprays water into the closed space 13 through the water outlet 9 to extinguish fire, wherein the control circuit board 14 adjusts the opening size of the adjusting valve 8 according to the electric signal transmitted by the flame sensor, if flame when brighter, the opening that governing valve 8 opened is just smaller, make water become water pressure form through governing valve 8 after put out a fire, the opening that governing valve 8 opened is just bigger on the contrary, make water become water smoke form through governing valve 8 after put out a fire, and when flame sensor 15 did not sense flame luminance, control circuit board 14 will be closed governing valve 8 according to the signal of telecommunication that flame sensor 15 transmits, then remaining sewage in confined space 13 just discharges to sewage pipe 6 through outlet 11, thereby make the mechanism of putting out a fire carry out corresponding water according to flame (height) size and spout and put out a fire, make the mechanism of putting out a fire better to utilize water to put out a fire, water is the resource commonly used simultaneously, thereby the cost when the whole use of greatly reduced device.
Preferably, the alarm 10, the control circuit board 14 at the top inside the supporting frame 7, the transmitter 16 at the top on the other side inside the supporting frame 7 and the receiver 17 in the middle of the other side inside the supporting frame 7 together form a positioning mechanism, in order to avoid the situation that the fire extinguishing mechanism cannot be used when in use, the fire extinguishing mechanism performs simulation tests at intervals, for example, a control terminal (a terminal computer controlled by a person) firstly performs electric signal transmission to the receiver 17 at the control circuit board 14 through the corresponding transmitter 16, then the control circuit board 14 performs corresponding simulation tests according to the operation of the control terminal after receiving data of the control terminal through the receiver 17, for example, whether the regulating valve 8 can be normally opened and whether the control circuit board 14 can receive electric signals of the flame sensor 15, and then the control circuit board 14 transmits corresponding test results to the receiver 17 at the control terminal through the corresponding transmitter 16, when one of the alarm devices fails to be normally started, the control circuit board 14 reports an error to the control terminal and starts the alarm device 10 through a lead, the alarm device 10 generates a reminding sound when being started, then the user can find the closed space 13 with the damaged structure through the reminding sound, and then the curtain wall exterior material is detached after the found closed space 13, then the mechanism behind the curtain wall exterior material 2 is maintained, and meanwhile, the control terminal and the control circuit board 14 are also connected by electric signals for a long time, therefore, when no electric signal connection exists between the control circuit board 14 (positioning) and the control terminal (reminding), the reminding is respectively carried out, so that a user can know that the connection of the closed space 13 at the position is disconnected in time, the alarm 10 has a positioning effect, so that the situation that the user cannot find out the damaged closed space 13 in time is avoided, the condition that the fire extinguishing mechanism cannot be normally used due to the fact that the fire extinguishing mechanism cannot be maintained in time is also avoided.
The working principle is as follows:
firstly, in order to avoid the damage of the flame sensor 15 caused by the fire generated by the heat-insulating layer 4 directly, the fireproof plate 18 is arranged between the flame sensor 15 and the heat-insulating layer 4, the heat transfer is slow due to the small heat conductivity coefficient of the fireproof plate 18, the condition that the fire is transmitted from the fire at the heat-insulating layer 4 to the flame sensor 15 is avoided, meanwhile, the fire extinguishing mechanism can play a role in extinguishing the fire at the same time of the fireproof plate 18, and then the flame sensor 15 is well protected;
then, the flame sensor 15 utilizes the characteristic that infrared rays are very sensitive to flames, the flame sensor 15 detects flames through an internal specially-made infrared receiving tube, then the brightness of the flames is converted into electric signals with high and low changes, the converted electric signals are transmitted to the inside of the control circuit board 14 by the flame sensor 15, and corresponding program processing is carried out by the control circuit board 14 according to the changes of the electric signals, so that the flame sensor 15 is arranged, and the control circuit board 14 can conveniently extinguish the fire in the closed space 13;
then, when the flame sensor 15 senses that the flame brightness is generated in the closed space 13, an electric signal is transmitted to the control circuit board 14, and the control circuit board 14 opens the regulating valve 8 when receiving the electric signal, wherein the clean water pipe 5 guides water into the branch water pipe 12 for a long time, so that when the regulating valve 8 opens, the clean water at the branch water pipe 12 flows out to the water outlet 9 through the regulating valve 8, and sprays water into the closed space 13 through the water outlet 9 for fire extinguishing, wherein the control circuit board 14 adjusts the opening size of the regulating valve 8 according to the electric signal transmitted by the flame sensor 15, if the flame is brighter, the opening size of the regulating valve 8 is smaller, so that the water passes through the regulating valve 8 and becomes water pressure for fire extinguishing, conversely, the opening size of the regulating valve 8 is larger, so that the water passes through the regulating valve 8 and becomes water mist for fire extinguishing, when the flame sensor 15 does not sense the flame brightness, the control circuit board 14 closes the regulating valve 8 according to an electric signal transmitted by the flame sensor 15, and then the residual sewage in the closed space 13 is discharged to the sewage pipe 6 through the water outlet 11, so that the fire extinguishing mechanism can perform corresponding water spraying according to the flame (height) to extinguish fire, the fire extinguishing mechanism can better utilize water to extinguish fire, and meanwhile, the water is a common resource, thereby greatly reducing the cost of the whole device when in use;
subsequently, the anti-slip pads 502 are arranged on the two sides of the bottom end of the bottom plate 5, so that the bottom plate 5 can be kept stable when the anti-slip pads 502 are used, and meanwhile, the anti-slip pads 502 are meshed pads made of silica gel, so that the friction force of the bottom plate 5 contacting with a desktop through the anti-slip pads 502 is greatly increased due to the arrangement of the anti-slip pads 502, the anti-slip property of the bottom plate 5 is correspondingly greatly increased, and the situation that the bottom plate 5 slides when the smooth desktop contacts is avoided;
finally, when the user needs to splice the panels 2, the fixing pin 7 is screwed out counterclockwise to disconnect the panels 2 from the supporting post 6, then the movable plates 902 of the splicing plates 9 at the two sides of the back of the panels 2 are unfolded from the corresponding fixed plates 901 through the hinge posts, after the movable plates 902 and the fixed plates 901 are unfolded in a straight line shape, the movable plates 902 are attached to the splicing grooves 10 at the corresponding positions of the other panels 2, correspondingly, the movable plates 902 of the other panels 2 are rotated to the corresponding overlapping grooves 10 of the panels 2, then the bolts are screwed clockwise through the holes in the middle of the movable plates 902 and the corresponding grooves in the middle of the overlapping grooves 10, so that the panels 2 are fixedly connected with the other panels 2, and because the four splicing mechanisms are arranged at the connecting positions between the panels 2 and the other panels 2 for connection, therefore, when one splicing mechanism is unstable, other splicing mechanisms can continue to connect the panel 2 and the other panel 2, and the condition that one splicing mechanism is unstable to be fixed between the panel 2 and the other panel 2 to cause disconnection and falling is avoided, which is the working principle of the fire-proof device for the external thermal insulation material of the high-rise building curtain wall.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a high-rise building curtain outer insulation material firebreak device, includes that the device is whole (1), clear water pipe (5), braced frame (7) and alarm (10), its characterized in that: a supporting frame (7) is fixedly connected in the middle of the device whole body (1), a sewage pipe (6) is connected with one side of the supporting frame (7) in a penetrating way, the middle inside the sewage pipe (6) is fixedly connected with a clean water pipe (5), the other side of the clean water pipe (5) is fixedly connected with a branch water pipe (12), the bottom of the branch water pipe (12) is fixedly connected with an adjusting valve (8), the bottom end of the adjusting valve (8) is fixedly connected with a water outlet (9), the inside of the supporting frame (7) is fixedly connected with a closed space (13), an alarm (10) is embedded and connected in the middle of one side of the supporting frame (7), the top of the inner part of the supporting frame (7) is fixedly connected with a control circuit board (14), the top of the other side inside the supporting frame (7) is fixedly connected with an emitter (16), a receiver (17) is fixedly connected to the middle of the other side of the inner part of the supporting frame (7).
2. The fire protection device for the external thermal insulation material of the high-rise building curtain wall as claimed in claim 1, wherein: one side of the supporting frame (7) is movably connected with a curtain wall exterior material (2), the other side of the supporting frame (7) is fixedly connected with a heat-insulating layer (4), and the other side of the heat-insulating layer (4) is fixedly connected with a building structure wall (3).
3. The fire protection device for the external thermal insulation material of the high-rise building curtain wall as claimed in claim 1, wherein: the other side of the sewage pipe (6) is fixedly connected with a water outlet (11).
4. The fire protection device for the external thermal insulation material of the high-rise building curtain wall as claimed in claim 1, wherein: and a flame sensor (15) is fixedly connected to the bottom of the other side of the inside of the supporting frame (7).
5. The fire protection device for the external thermal insulation material of the high-rise building curtain wall as claimed in claim 1, wherein: and the other side of the supporting frame (7) is fixedly connected with a fireproof plate (18).
6. The fire protection device for the external thermal insulation material of the high-rise building curtain wall as claimed in claim 1, wherein: the fire extinguishing mechanism is composed of the sewage pipe (6), a clear water pipe (5) in the middle of the inside of the sewage pipe (6), a branch water pipe (12) on the other side of the clear water pipe (5), an adjusting valve (8) at the bottom of the branch water pipe (12), a water outlet (9) at the bottom of the adjusting valve (8) and a control circuit board (14) at the top of the inside of the supporting frame (7).
7. The fire protection device for the external thermal insulation material of the high-rise building curtain wall as claimed in claim 1, wherein: the alarm (10) and a control circuit board (14) on the top inside the supporting frame (7), a transmitter (16) on the top of the other side inside the supporting frame (7) and a receiver (17) in the middle of the other side inside the supporting frame (7) jointly form a positioning mechanism.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202021431681.4U CN212957143U (en) | 2020-07-20 | 2020-07-20 | Fire protection device for external thermal insulation material of high-rise building curtain wall |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202021431681.4U CN212957143U (en) | 2020-07-20 | 2020-07-20 | Fire protection device for external thermal insulation material of high-rise building curtain wall |
Publications (1)
Publication Number | Publication Date |
---|---|
CN212957143U true CN212957143U (en) | 2021-04-13 |
Family
ID=75393957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202021431681.4U Active CN212957143U (en) | 2020-07-20 | 2020-07-20 | Fire protection device for external thermal insulation material of high-rise building curtain wall |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN212957143U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2607853A (en) * | 2020-12-21 | 2022-12-21 | Wi Innovate Ltd | Fire protection system on a structure |
CN115839141A (en) * | 2022-11-30 | 2023-03-24 | 徐州志正装饰材料有限公司 | Assembled unit fire prevention curtain wallboard |
-
2020
- 2020-07-20 CN CN202021431681.4U patent/CN212957143U/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2607853A (en) * | 2020-12-21 | 2022-12-21 | Wi Innovate Ltd | Fire protection system on a structure |
CN115839141A (en) * | 2022-11-30 | 2023-03-24 | 徐州志正装饰材料有限公司 | Assembled unit fire prevention curtain wallboard |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN212957143U (en) | Fire protection device for external thermal insulation material of high-rise building curtain wall | |
CN213285441U (en) | Superfine dry powder fire extinguishing device for cable trench and vertical shaft | |
CN112843568A (en) | Fire-fighting spraying system | |
CN201320357Y (en) | Fire-proof door curtain | |
CN110496340A (en) | A kind of intelligent fire cabinet of multiple safety protection | |
CN206745803U (en) | A kind of fire extinguishing system that can be detected disaster hidden-trouble automatically and start spray | |
CN212200834U (en) | Fireproof heat-insulation board for building | |
CN209187990U (en) | A kind of interior extinction by automatic sprinkling system | |
CN102287019B (en) | Fireproof device for external heat insulation materials for high rise building curtail wall | |
CN110604883A (en) | Emergency fire-fighting equipment with power device | |
CN203690718U (en) | Automatic fire extinguishing power distribution cabinet | |
CN110947148A (en) | Automatic fire extinguishing system and fire extinguishing operation method thereof | |
CN213359885U (en) | Novel multifunctional fire door | |
CN216381113U (en) | Fireproof intelligent door and window | |
CN209075937U (en) | A kind of pipe gallery fire management system | |
CN205211091U (en) | Firefighting rescue window | |
CN109675218B (en) | Household refuge cabin for high-rise building in fire period and use method thereof | |
CN114038155B (en) | Residential security system based on Internet of things | |
CN209347971U (en) | A kind of cabinet-type Automatic spark detection extinguishing device | |
CN221061613U (en) | Real device of instructing of fire control fire extinguishing systems installation and debugging | |
CN212090583U (en) | Fireproof plate of transformer substation steel structure building | |
CN110882512B (en) | Indoor fire extinguishing equipment utilizing water pressure protection circuit | |
CN215275528U (en) | Household fire-fighting system | |
CN213359891U (en) | Structure of fire-fighting smoke exhaust window | |
CN213273042U (en) | Intelligent smoke exhaust preventing device in fire engineering |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |