CN112546495B - Multi-functional electric power construction electric power fire protection device - Google Patents
Multi-functional electric power construction electric power fire protection device Download PDFInfo
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- CN112546495B CN112546495B CN202011519081.8A CN202011519081A CN112546495B CN 112546495 B CN112546495 B CN 112546495B CN 202011519081 A CN202011519081 A CN 202011519081A CN 112546495 B CN112546495 B CN 112546495B
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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
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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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
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
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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
-
- 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
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention is suitable for the field of electric power construction, and provides a multifunctional electric power construction electric power fireproof protection device, which comprises: guard box and temperature sensor, be equipped with the wire passage who places the electric wire in the guard box, the top that corresponds wire passage in the guard box is equipped with two at least subassemblies of putting out a fire, the subassembly of putting out a fire includes fire extinguishing agent case and leads to the joint soon, the second conveyer pipe is connected and runs through the swiveling wheel with the eccentric position of swiveling wheel and be connected with the shower nozzle, and the rotatory area that increases the fire extinguishing agent of shower nozzle shortens the required time of putting out a fire, and piston compression inert gas gets into the gas incasement, and rupture disc blasting back inert gas gets into the oxygen consumption in the guard box, reduces the possibility that the conflagration stretchs, and fire-retardant layer is leaked the back fire-retardant powder of burning and will cover the naked light, effectively avoids the electric wire to receive the problem that the conflagration caused the damage, and the coolant liquid is cooled down to the guard box inside through the heat conduction piece, reduces the probability that the conflagration takes place, plays the fire prevention effect.
Description
Technical Field
The invention relates to the field of power construction, in particular to a multifunctional power construction power fireproof protection device.
Background
There are numerous power plant and substation wires, with control, power and communication wires as close as a spider web, most of which are densely laid through wire tunnels, trenches or aerial.
At present, a plurality of electric wires are often arranged in a staggered mode in electric power construction, due to the lack of an electric power fireproof protection device, electric power fire disasters are extremely easy to cause by the electric wires, the fire disasters cannot be effectively flame-retardant and can be rapidly spread, influence is caused on electric power supply and transmission, and constructors also have life risks.
Disclosure of Invention
The invention aims to provide a multifunctional electric power construction electric power fire protection device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a multifunctional electric power construction electric power fire protection device comprises: protection box and temperature sensor, be equipped with the wire channel who places the electric wire in the protection box, be equipped with a plurality of temperature sensor in the protection box, the top that corresponds wire channel in the protection box is equipped with two at least subassemblies of putting out a fire, the subassembly of putting out a fire includes the fire extinguishing agent case and leads to the joint soon, the fire extinguishing agent case just is equipped with first solenoid valve with first duct connections in the junction, be equipped with the force (forcing) pump on the first conveyer pipe, lead to the one end and the first duct connections that connect soon, lead to the other end and the second duct connections that connect soon, the second conveyer pipe is connected and runs through the swiveling wheel and is connected with the shower nozzle with the eccentric position of swiveling wheel, the center pin department of swiveling wheel is equipped with the rotation axis of being connected with output motor, lead to the joint soon and set up on the center pin line of one side that output motor was kept away from to the swiveling wheel.
As a further scheme of the invention: the fire extinguishing assembly further comprises a connecting rod and an inert gas box, a sliding groove which is arranged in a zigzag mode is formed in the rotating wheel and is in sliding connection with the sliding block, one end of the connecting rod is fixedly connected with the sliding block, the other end of the connecting rod is fixedly connected with the sliding rod, the sliding rod is in sliding connection with a limiting rod fixed inside the protection box, the limiting rod is fixedly connected with the piston, the piston is in sliding connection with the piston cylinder, the inert gas box is connected with the piston cylinder through a first gas supply pipe, a second electromagnetic valve is arranged at the joint of the first gas supply pipe and the piston cylinder, the piston cylinder is connected with the gas box through a second gas supply pipe, and a bursting sheet is in threaded connection with the top of the gas box.
As a still further scheme of the invention: the number of the wire channels is multiple, and each wire channel is arranged in parallel.
As a still further scheme of the invention: the junction of electric wire passageway and guard box all is equipped with a solid fixed ring on the guard box outer wall, every gu fixed ring all is connected with a gooseneck.
As a still further scheme of the invention: the fixing ring is internally provided with an elastic ring which is made of soft materials, and the elastic ring is internally provided with a supporting plate.
As a still further scheme of the invention: and the periphery of the electric wire channel is provided with a flame-retardant layer, and flame-retardant powder is filled in the flame-retardant layer.
As a still further scheme of the invention: the cooling box is installed on the periphery of the protection box, a circulation cavity is arranged between the cooling box and the protection box, cooling liquid is filled in the cooling box, a plurality of refrigerators are installed in the cooling box, and the inside of the cooling box is connected with the inside of the protection box through a plurality of heat conducting fins.
Compared with the prior art, the invention has the beneficial effects that:
1. the spray head rotates to increase the coverage area of the fire extinguishing agent and shorten the time required for fire extinguishing, the piston compresses inert gas to enter the gas box, and the inert gas enters the protection box to consume oxygen after the rupture disk is exploded, so that the possibility of fire spreading is reduced.
2. After the flame-retardant layer is burnt, the flame-retardant powder leaks to cover and extinguish the open fire, and the problem that the electric wire is damaged by fire is effectively avoided.
3. The coolant liquid is cooled down to the inside of the protection box through the heat conducting fins, so that the probability of fire occurrence is reduced, and the fireproof effect is achieved.
Drawings
Fig. 1 is a schematic structural diagram of a multifunctional electric power construction electric power fire protection device.
Fig. 2 is a schematic structural diagram of a fire extinguishing assembly in the multifunctional electric power construction electric power fire protection device.
Fig. 3 is a schematic structural diagram of a rupture disk in the multifunctional electric power construction electric power fire protection device.
Fig. 4 is a schematic structural diagram of an elastic ring in the multifunctional electric power construction electric power fire protection device.
Fig. 5 is a schematic structural diagram of a cooling box in the multifunctional electric power construction electric power fire protection device.
In the drawings: 1-protective box, 2-wire channel, 3-temperature sensor, 4-fire extinguishing agent box, 5-first delivery pipe, 6-first electromagnetic valve, 7-booster pump, 8-rotary joint, 9-second delivery pipe, 10-spray head, 11-rotary wheel, 12-rotary shaft, 13-output motor, 14-sliding chute, 15-sliding block, 16-connecting rod, 17-sliding rod, 18-limiting rod, 19-piston, 20-piston cylinder, 21-inert gas box, 22-first air supply pipe, 23-second electromagnetic valve, 24-second air supply pipe, 25-air box, 26-rupture disk, 27-fixing ring, 28-gooseneck pipe, 29-flame retardant layer, 30-elastic ring, 31-supporting plate, 32-cooling box, 33-cooling liquid, 34-refrigerator, 35-heat conducting sheet and 36-circulation cavity.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
As shown in fig. 1 to 2, in an embodiment of the present invention, a multifunctional power construction power fire protection device includes: a protection box 1 and a temperature sensor 3, wherein a wire channel 2 for placing wires is arranged in the protection box 1, a plurality of temperature sensors 3 are arranged in the protection box 1, at least two fire extinguishing assemblies are arranged in the protection box 1 above the corresponding wire channels 2, the fire extinguishing assembly comprises a fire extinguishing agent box 4 and a screwed joint 8, the fire extinguishing agent box 4 is connected with a first conveying pipe 5, a first electromagnetic valve 6 is arranged at the joint, a pressure pump 7 is arranged on the first conveying pipe 5, one end of the rotary joint 8 is connected with the first conveying pipe 5, the other end of the rotary joint 8 is connected with a second conveying pipe 9, the second conveying pipe 9 is connected with the eccentric position of a rotating wheel 11 and penetrates through the rotating wheel 11 to be connected with a spray head 10, a rotating shaft 12 connected with the output end of an output motor 13 is arranged at the central shaft of the rotating wheel 11, the spin-on joint 8 is arranged on the central axis of the rotating wheel 11 on the side away from the output motor 13.
As shown in fig. 1 to 3, as a preferred embodiment of the present invention, the fire extinguishing assembly further includes a connecting rod 16 and an inert gas tank 21, the rotating wheel 11 is provided with a sliding groove 14 arranged in a zigzag manner, the sliding groove 14 is slidably connected with a sliding block 15, one end of the connecting rod 16 is fixedly connected with the sliding block 15, the other end of the connecting rod 16 is fixedly connected with a sliding rod 17, the sliding rod 17 is slidably connected with a limiting rod 18 fixed inside the protection box 1, the limiting rod 18 is fixedly connected with a piston 19, the piston 19 is slidably connected with a piston cylinder 20, the inert gas tank 21 is connected with the piston cylinder 20 through a first gas supply pipe 22, a second electromagnetic valve 23 is arranged at a connection position of the first gas supply pipe 22 and the piston cylinder 20, the piston cylinder 20 is connected with a gas tank 25 through a second gas supply pipe 24, and a bursting sheet 26 is connected to the top of the gas tank 25 through a thread.
In practical application, an electric wire passes through the electric wire channel 2, the protection box 1 can protect the electric wire in the electric wire channel 2 from causing an electric fire, if the temperature in the protection box 1 is too high to reach the preset temperature of the temperature sensor 3, the temperature sensor 3 sends a signal to an external controller to regulate the opening of the first electromagnetic valve 6 and the second electromagnetic valve 23, the fire extinguishing agent in the fire extinguishing agent box 4 flows from the first conveying pipe 5 to the second conveying pipe 9 after being pressurized by the pressure pump 7, meanwhile, the output motor 13 is electrified to work to drive the rotating shaft 12 to rotate and drive the rotating wheel 11 to rotate, because the second conveying pipe 9 is connected with the eccentric part of the rotating wheel 11, the rotating wheel 11 rotates to drive the spray head 10 to rotate by taking the central shaft of the rotating wheel 11 as the axis, the coverage area of the fire extinguishing agent sprayed from the spray head 10 is increased, the time required for fire extinguishing is shortened, and the sliding block 15 slides in the sliding groove 14 while the rotating wheel 11 rotates, the connecting rod 16 drives the sliding rod 17 to do reciprocating linear motion in the limiting rod 18, so that the piston 19 slides in the piston cylinder 20, the inert gas flowing into the piston cylinder 20 from the inert gas box 21 through the first gas supply pipe 22 is compressed, the inert gas enters the gas box 25 through the second gas supply pipe 24, when the gas content in the gas box 25 reaches the maximum value, the rupture disk 26 is exploded, the inert gas enters the protection box 1 and reacts with oxygen in the protection box 1 to reduce the content of the inert gas, the possibility of fire spreading is reduced, the fire resistance of the device is improved, only the rupture disk 26 needs to be replaced after the rupture disk 26 is exploded, the gas box 25 does not need to be replaced, and the durability of the device is improved.
As another preferred embodiment of the present invention, as shown in fig. 1, the number of the wire passages 2 is plural, and each of the wire passages 2 is arranged in parallel.
As shown in fig. 1 to 4, as another preferred embodiment of the present invention, a fixing ring 27 is disposed at the connection position of the wire channel 2 and the protection box 1 on the outer wall of the protection box 1, and each fixing ring 27 is connected with a gooseneck 28.
As shown in fig. 4, as another preferred embodiment of the present invention, an elastic ring 30 is provided in the fixing ring 27, the elastic ring 30 is made of soft material, and a support plate 31 is provided in the elastic ring 30.
As shown in fig. 1, as another preferred embodiment of the present invention, a flame retardant layer 29 is disposed on the periphery of the wire channel 2, and the flame retardant layer 29 is filled with flame retardant powder.
In practical application, a plurality of electric wires can insert respectively in a plurality of wire passage 2, effectively avoid the winding condition of electric wire, effectively avoid the emergence of conflagration, gooseneck 28 set up that the protection electric wire is difficult because buckle and cause the damage, when inserting the electric wire, the setting up of elastic ring 30 makes the electric wire of thickness difference all can insert in wire passage 2 and fixed, the condition that the skew solid fixed ring 27 of elastic ring 30 caused the damage is avoided to the inside backup pad 31 of elastic ring 30, if the inside conflagration that takes place of guard box 1, fire-retardant layer 29 is leaked and will cover the naked light that goes out after being burnt, thereby effectively avoid the electric wire to receive the conflagration to cause the problem of damage.
As shown in fig. 5, as another preferred embodiment of the present invention, a cooling tank 32 is installed on the periphery of the protection tank 1, a circulation cavity 36 is provided between the cooling tank and the protection tank, a cooling liquid 33 is filled in the cooling tank 32, a plurality of refrigerators 34 are installed in the cooling tank 32, and the inside of the cooling tank 32 is connected to the inside of the protection tank 1 through a plurality of heat conductive sheets 35.
In practical application, electric power engineering is at the during operation, and the electric wire environment often produces higher heat, and coolant liquid 33 in refrigerator 34 control cooling box 32 is in low temperature all the time, and when the heat was too high in protection box 1, through conducting to circulation chamber 36 in conducting to conducting through conducting strip 35, when the heat was taken away in the circulation of air, coolant liquid 33 cooled down through conducting strip 35 to protection box 1 is inside to reduce the probability that the conflagration took place, played the effect of preventing fires.
The working principle of the invention is as follows:
the fire extinguishing agent in the fire extinguishing agent box 4 flows from the first conveying pipe 5 to the second conveying pipe 9 after being pressurized by the pressurizing pump 7, the rotating shaft 12 rotates to drive the rotating wheel 11 to rotate, the spray head 10 rotates by taking the central shaft of the rotating wheel 11 as an axis, the sliding block 15 slides in the sliding groove 14 and drives the sliding rod 17 to do reciprocating linear motion in the limiting rod 18 through the connecting rod 16, the piston 19 slides in the piston cylinder 20 and compresses the inert gas flowing into the piston cylinder 20 from the inert gas box 21 through the first gas supply pipe 22, the inert gas enters the gas box 25 through the second gas supply pipe 24, when the gas content in the gas box 25 reaches the maximum value, the blasting piece 26 is blasted, the inert gas enters the protection box 1 and reacts with the oxygen in the protection box 1 to reduce the content of the inert gas, the possibility of fire spreading is reduced, and the fire resistance of the device is improved. If a fire disaster occurs in the protection box 1, the fire-retardant powder leaks out after the fire-retardant layer 29 is burnt, so that the open fire is extinguished, and the problem that the electric wire is damaged by the fire disaster is effectively solved. The refrigerator 34 controls the cooling liquid 33 in the cooling box 32 to be always at a low temperature, and the cooling liquid 33 cools the inside of the protection box 1 through the heat conducting fins 35, so that the probability of fire occurrence is reduced, and a fireproof effect is achieved.
It should be noted that, the electric components of the present invention, such as the temperature sensor 3, the first solenoid valve 6, the output motor 13, and the second solenoid valve 23, are all connected to an external controller, which is the prior art, and the present invention does not modify the external controller, so that it is not necessary to disclose the specific model, circuit structure, etc. of the external controller, and the integrity of the present invention is not affected.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (6)
1. A multifunctional electric power construction electric power fire protection device comprises: the fire extinguishing device comprises a protection box (1) and temperature sensors (3), and is characterized in that a wire channel (2) for placing wires is arranged in the protection box (1), a plurality of temperature sensors (3) are arranged in the protection box (1), at least two fire extinguishing assemblies are arranged in the protection box (1) and above the wire channel (2), each fire extinguishing assembly comprises a fire extinguishing agent box (4) and a rotary joint (8), each fire extinguishing agent box (4) is connected with a first conveying pipe (5), a first electromagnetic valve (6) is arranged at the joint of each fire extinguishing agent box and the corresponding first conveying pipe (5), a pressure pump (7) is arranged on each first conveying pipe (5), one end of each rotary joint (8) is connected with the corresponding first conveying pipe (5), the other end of each rotary joint (8) is connected with a second conveying pipe (9), each second conveying pipe (9) is connected with the eccentric position of a rotating wheel (11) and penetrates through the rotating wheel (11) to be connected with a spray head (10), the fire extinguishing assembly comprises a rotary wheel (11), a rotary shaft (12) and an inert gas box (21), wherein the rotary shaft (12) is arranged at the central shaft of the rotary wheel (11) and connected with the output end of an output motor (13), the rotary joint (8) is arranged on the central shaft of one side of the rotary wheel (11) far away from the output motor (13), a connecting rod (16) and the inert gas box (21) are arranged on the rotary wheel (11), a sliding groove (14) which is arranged in a zigzag mode is formed in the rotary wheel (11), the sliding groove (14) is in sliding connection with a sliding block (15), one end of the connecting rod (16) is fixedly connected with the sliding block (15), the other end of the connecting rod (16) is fixedly connected with a sliding rod (17), the sliding rod (17) is in sliding connection with a limiting rod (18) fixed inside a protection box (1), the limiting rod (18) is fixedly connected with a piston (19), the piston (19) is in sliding connection with a piston cylinder (20), and the inert gas box (21) is connected with a piston cylinder (20) through a first gas feeding pipe (22), and a second electromagnetic valve (23) is arranged at the joint of the first air supply pipe (22) and the piston cylinder (20), the piston cylinder (20) is connected with an air box (25) through a second air supply pipe (24), and a rupture disc (26) is in threaded connection with the top of the air box (25).
2. Multifunctional electric power construction electric power fire protection arrangement according to claim 1, characterized in that the number of wire channels (2) is multiple and each wire channel (2) is arranged in parallel.
3. The multifunctional electric power construction electric power fire protection device according to claim 1, wherein a fixing ring (27) is arranged at the joint of the electric wire channel (2) and the protection box (1) on the outer wall of the protection box (1), and each fixing ring (27) is connected with a gooseneck (28).
4. Multifunctional electric power construction electric power fire protection arrangement according to claim 3, characterized in that an elastic ring (30) is provided in the fixed ring (27), the elastic ring (30) is made of soft material, a support plate (31) is provided in the elastic ring (30).
5. The multifunctional electric power construction electric power fireproof protection device as claimed in claim 2, wherein a flame retardant layer (29) is arranged at the periphery of the electric wire channel (2), and the flame retardant layer (29) is filled with flame retardant powder.
6. The multifunctional electric power construction electric power fireproof protection device according to claim 1, wherein a cooling box (32) is installed on the periphery of the protection box (1), a circulation cavity (36) is arranged between the cooling box and the protection box, a cooling liquid (33) is filled in the cooling box (32), a plurality of refrigerators (34) are installed in the cooling box (32), and the inside of the cooling box (32) is connected with the inside of the protection box (1) through a plurality of heat conducting fins (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011519081.8A CN112546495B (en) | 2020-12-21 | 2020-12-21 | Multi-functional electric power construction electric power fire protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011519081.8A CN112546495B (en) | 2020-12-21 | 2020-12-21 | Multi-functional electric power construction electric power fire protection device |
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| CN112546495A CN112546495A (en) | 2021-03-26 |
| CN112546495B true CN112546495B (en) | 2022-04-08 |
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| CN202011519081.8A Active CN112546495B (en) | 2020-12-21 | 2020-12-21 | Multi-functional electric power construction electric power fire protection device |
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| EP2433676A2 (en) * | 2010-09-28 | 2012-03-28 | Elin Ebg Traction GmbH | Fire-resistant housing for a frequency converter |
| US20190148036A1 (en) * | 2015-02-20 | 2019-05-16 | Clifton Royston | Ignition Suppression Circuiting Technology |
| CN208959195U (en) * | 2018-08-15 | 2019-06-11 | 西安新竹防务科技有限公司 | A kind of dry powder extinguisher |
| CN110706857A (en) * | 2019-10-16 | 2020-01-17 | 扬州市红旗电缆制造有限公司 | High ageing resistance does not have steamed low fire-retardant marine frock spare special cable of cigarette |
| CN210577286U (en) * | 2019-09-16 | 2020-05-19 | 浙江令大夫生物科技有限公司 | Electric power construction electric power fire protection device |
| CN111769441A (en) * | 2020-06-11 | 2020-10-13 | 张代勇 | Novel intelligent fireproof electrical cabinet |
| CN111790084A (en) * | 2020-07-16 | 2020-10-20 | 哲弗智能***（上海）有限公司 | Intelligent thermal trigger spray head and fire extinguishing device |
-
2020
- 2020-12-21 CN CN202011519081.8A patent/CN112546495B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2433676A2 (en) * | 2010-09-28 | 2012-03-28 | Elin Ebg Traction GmbH | Fire-resistant housing for a frequency converter |
| US20190148036A1 (en) * | 2015-02-20 | 2019-05-16 | Clifton Royston | Ignition Suppression Circuiting Technology |
| CN208959195U (en) * | 2018-08-15 | 2019-06-11 | 西安新竹防务科技有限公司 | A kind of dry powder extinguisher |
| CN210577286U (en) * | 2019-09-16 | 2020-05-19 | 浙江令大夫生物科技有限公司 | Electric power construction electric power fire protection device |
| CN110706857A (en) * | 2019-10-16 | 2020-01-17 | 扬州市红旗电缆制造有限公司 | High ageing resistance does not have steamed low fire-retardant marine frock spare special cable of cigarette |
| CN111769441A (en) * | 2020-06-11 | 2020-10-13 | 张代勇 | Novel intelligent fireproof electrical cabinet |
| CN111790084A (en) * | 2020-07-16 | 2020-10-20 | 哲弗智能***（上海）有限公司 | Intelligent thermal trigger spray head and fire extinguishing device |
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| CN112546495A (en) | 2021-03-26 |
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