CN220002826U - Liquid nitrogen fire extinguishing device is patrolled and examined in tunnel - Google Patents
Liquid nitrogen fire extinguishing device is patrolled and examined in tunnel Download PDFInfo
- Publication number
- CN220002826U CN220002826U CN202321096819.3U CN202321096819U CN220002826U CN 220002826 U CN220002826 U CN 220002826U CN 202321096819 U CN202321096819 U CN 202321096819U CN 220002826 U CN220002826 U CN 220002826U
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- Prior art keywords
- liquid nitrogen
- fire extinguishing
- extinguishing device
- fire
- fixedly connected
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 276
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 137
- 239000007788 liquid Substances 0.000 title claims abstract description 128
- 238000007689 inspection Methods 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 16
- 239000000779 smoke Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 6
- 210000000078 claw Anatomy 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 230000008016 vaporization Effects 0.000 abstract description 2
- 238000009834 vaporization Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 18
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- 206010000369 Accident Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model discloses a liquid nitrogen fire extinguishing device for roadway inspection, and belongs to the field of fire extinguishing devices. Comprising the following steps: the base is used for installing a liquid nitrogen fire extinguishing device; the liquid nitrogen fire extinguisher is arranged at the top of the base and is used for spraying liquid nitrogen to extinguish fire; one side fixedly connected with curb plate of base, the equal sliding connection in both sides bottom and the top of curb plate has the spacing ring, the one end fixedly connected with elastic webbing of spacing ring, the elastic webbing cup joints in the liquid nitrogen fire extinguisher outside. Compared with the prior art, the liquid nitrogen fire extinguishing device has the advantages that the operation of other parts is controlled through the arranged controller, so that the liquid nitrogen fire extinguishing device can automatically find a fire starting point, the temperature around the fire source and the oxygen concentration near the diluted fire starting point are reduced through vaporization and heat absorption of liquid nitrogen, fire is extinguished, the field operation of personnel is not needed, and the automatic fire extinguishing is realized.
Description
Technical Field
The utility model relates to the field of fire extinguishing devices, in particular to a liquid nitrogen fire extinguishing device for roadway inspection.
Background
The casualties rate caused by fire accidents in the underground operation process are far greater than other accidents, and once the fire accidents occur, accidents such as gas, coal dust explosion and the like can be caused. After the mine fire disaster occurs, a large amount of high-temperature flames are generated along with the development of the fire disaster, and the flames contain a large amount of toxic and choking gases, so that if the fire disaster is not timely found or the fire extinguishing method is improper, the fire disaster develops rapidly, serious consequences are caused, and the life safety of workers is seriously threatened.
There are three methods that are now widely used in downhole extinguishment: the direct fire extinguishing method is an isolated fire extinguishing method and a combined fire extinguishing method. All three methods need human operation, and harmful gas generated during accidents seriously pollute underground wind flow, thereby threatening the safety of underground staff.
Therefore, a device capable of automatically completing fire extinguishment when a fire disaster occurs is needed, the life safety of personnel is guaranteed, and possible economic loss and casualties are reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the purpose of the disclosure is to provide a roadway inspection liquid nitrogen fire extinguishing device, which solves the problems that the prior underground fire extinguishing method needs human operation, harmful gas is generated during accident occurrence, underground wind current is seriously polluted, and the safety of underground staff is threatened.
The aim of the utility model can be achieved by the following technical scheme:
a roadway inspection liquid nitrogen fire extinguishing device, comprising:
the base is used for installing a liquid nitrogen fire extinguishing device;
the liquid nitrogen fire extinguisher is arranged at the top of the base and is used for spraying liquid nitrogen to extinguish fire; one side fixedly connected with curb plate of base, the equal sliding connection in both sides bottom and the top of curb plate has the spacing ring, the one end fixedly connected with elastic webbing of spacing ring, the elastic webbing cup joints in the liquid nitrogen fire extinguisher outside, the outside threaded connection of spacing ring has fixing bolt, be equipped with evenly distributed's screw hole on the curb plate, fixing bolt runs through the spacing ring and passes through screw hole and curb plate threaded connection.
The technical scheme has the following principle and effects: during assembly, the fixing bolts on the side plates are loosened, the two limiting rings are slid downwards to a proper position, then the liquid nitrogen fire extinguisher is manually lifted to be inserted into the two limiting rings and placed on the base, then the two limiting rings are slid upwards to a proper position, the fixing bolts are fastened by the screws to fix the liquid nitrogen fire extinguisher, and assembly is completed.
In some disclosures, moving wheels are fixedly arranged at four corners of the bottom of the base.
In some disclosures, the liquid nitrogen extinguisher comprises a liquid nitrogen storage module and a liquid nitrogen injection module, the liquid nitrogen storage module is a liquid nitrogen tank, and the liquid nitrogen injection module comprises an automatic liquid nitrogen pump.
In some disclosures, the top of the automatic liquid nitrogen pump is fixedly connected with a nitrogen delivery pipe, the top of the nitrogen delivery pipe is fixedly connected with a valve, and one side of the nitrogen delivery pipe far away from the limiting ring is rotationally connected with a spray head.
In some disclosures, the other end of the spray head is rotatably coupled to a showerhead.
In some disclosures, a gas detector is fixedly mounted on one side of the side plate, a camera is fixedly connected to the top of the side plate, and a smoke sensor, a temperature sensor and an infrared sensor are fixedly connected to one side of the side plate.
In some disclosures, a protective pad is fixedly mounted inside the stop collar.
In some disclosures, electric push rods are fixedly connected to the periphery of the bottom of the base, and fixing claws are fixedly connected to the bottom of the electric push rods.
In some disclosures, an energy driving device is fixedly connected to the inside of the base.
In some disclosures, a controller is arranged on one side of the side plate, and the controller is electrically connected with an energy driving device, a gas detector, a jet head, a valve, a smoke sensor, a temperature sensor, a camera, an automatic liquid nitrogen pump and an infrared sensor.
The noun, conjunctive or adjective parts referred to in the above technical solutions are explained as follows:
the fixed connection refers to the connection without any relative movement after the parts or components are fixed;
the rotational connection means that the connection between the parts can make the parts rotate with each other;
the threaded connection is detachable fixed connection, has the advantages of simple structure, reliable connection, convenient assembly and disassembly and the like, and is widely applied to the fields of mechanical engineering and connection structures;
sliding connection means that the connection between the parts allows the parts to slide relative to each other.
The utility model has the beneficial effects that:
through the controller that sets up for liquid nitrogen extinguishing device can look for the fire point automatically, through the vaporization heat absorption of liquid nitrogen gas, reduces the temperature around the fire source and dilutes the oxygen concentration near the fire point, puts out a fire, does not need personnel's on-the-spot operation, realizes automatic fire extinguishing.
The limiting rings are arranged and can be connected with the side plates in a sliding manner, so that when the liquid nitrogen fire extinguishing device is assembled, the limiting rings can be slid, the height positions of the limiting rings are reduced, a worker can conveniently insert a tank bottle into two elastic bands connected with the limiting rings, and the labor capacity of the worker for assembling the liquid nitrogen fire extinguishing device is reduced;
the fixed bolts are used for fixing the limiting rings and the side plates in a threaded manner, so that the sliding control of the limiting rings is simpler and more convenient;
through setting up the protection pad for alleviate the slip collision of spacing ring, promote spacing ring life.
Drawings
The utility model is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the inside of the liquid nitrogen fire extinguisher according to the present utility model;
fig. 3 is a schematic view of an electric putter according to the present utility model.
Fig. 4 is a schematic view of the inside of the base of the present utility model.
The components corresponding to the reference numerals in the figures are as follows: 1. a base; 2. liquid nitrogen fire extinguisher; 3. a side plate; 4. a limiting ring; 5. an elastic belt; 6. a fixing bolt; 7. a threaded hole; 8. a moving wheel; 9. a liquid nitrogen tank; 10. an automatic liquid nitrogen pump; 13. a nitrogen delivery tube; 14. a valve; 15. an ejection head; 16. a shower nozzle; 17. a gas detector; 18. a protective pad; 19. an electric push rod; 20. a fixed claw; 21. a camera; 22. an energy driving device; 23. a controller; 24. a smoke sensor; 25. a temperature sensor; 26. and an infrared sensor.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
According to the inventive ideaAn embodiment of a roadway inspection liquid nitrogen fire suppression device is described herein in connection with fig. 1-4. Specifically, the liquid nitrogen fire extinguishing device is constructed as an integral structure, and comprises a base 1, a liquid nitrogen fire extinguisher 2, a limiting ring 4, a side plate 3, an elastic belt 5 and other components. During assembly, the fixing bolts 6 on the side plates 3 are loosened firstly, the two limiting rings 4 are slid downwards to a proper position, then the liquid nitrogen fire extinguisher 2 is manually lifted to be inserted into the two limiting rings 4 and placed on the base 1, then the two limiting rings 4 are slid upwards to a proper position, the fixing bolts 6 are screwed to fix the liquid nitrogen fire extinguisher 2, and when the assembly is completed, the controller 23 drives the energy driving device 22 to patrol the roadway through a built-in program, and when the smoke sensor 24 and the temperature sensor 25 detect that smoke exists nearby and the temperature rises, the nearby fire point is proved to exist, and the position of the fire point is positioned through the infrared sensor 26 ， The liquid nitrogen fire extinguishing device is moved to a position near a fire point through the moving wheel 8 by the controller 23, the automatic liquid nitrogen pump 10 is turned on by the controller 23, liquid nitrogen in the liquid nitrogen tank 9 is pumped up by the automatic liquid nitrogen pump 10, then the valve 14 is turned on by the controller 23, the liquid nitrogen in the liquid nitrogen tank 9 is sprayed to the fire point by the automatic liquid nitrogen pump 10, fire extinguishing operation is carried out, and fire extinguishing is completed.
A roadway inspection liquid nitrogen fire extinguishing device, comprising:
the base 1 is used for installing a liquid nitrogen fire extinguishing device;
a liquid nitrogen fire extinguisher 2, wherein the liquid nitrogen fire extinguisher 2 is arranged at the top of the base 1 and is used for spraying liquid nitrogen to extinguish fire; one side fixedly connected with curb plate 3 of base 1, the equal sliding connection in both sides bottom and the top of curb plate 3 has spacing ring 4, the one end fixedly connected with elastic webbing 5 of spacing ring 4, elastic webbing 5 cup joints in liquid nitrogen fire extinguisher 2 outside, the outside threaded connection of spacing ring 4 has fixing bolt 6, be equipped with evenly distributed's screw hole 7 on the curb plate 3, fixing bolt 6 runs through spacing ring 4 and through screw hole 7 and curb plate 3 threaded connection. It should be further noted that in the specific implementation process, during the assembly, the fixing bolts 6 on the side plates 3 are loosened firstly, then the two limiting rings 4 slide downwards to a proper position, and then the liquid nitrogen fire extinguisher is lifted manually2 are inserted into two limiting rings 4 and placed on a base 1, then the two limiting rings 4 are slid upwards to a proper position, a fixing bolt 6 is screwed to fix the liquid nitrogen fire extinguisher 2, and when the liquid nitrogen fire extinguisher is assembled, during use, a controller 23 drives a power driving device 22 to patrol a roadway through a built-in program, when smoke sensors 24 and temperature sensors 25 detect the condition that smoke and temperature rise are nearby, a fire point is proved to be nearby, and the position of the fire point is located through an infrared sensor 26 ， The liquid nitrogen fire extinguishing device is moved to a position near a fire point through the moving wheel 8 by the controller 23, the automatic liquid nitrogen pump 10 is turned on by the controller 23, liquid nitrogen in the liquid nitrogen tank 9 is pumped up by the automatic liquid nitrogen pump 10, then the valve 14 is turned on by the controller 23, the liquid nitrogen in the liquid nitrogen tank 9 is sprayed to the fire point by the automatic liquid nitrogen pump 10, fire extinguishing operation is carried out, and fire extinguishing is completed.
In the specific implementation process, the moving wheels 8 are fixedly installed at four corners of the bottom of the base 1. By the arrangement of the movable wheels 8, the liquid nitrogen fire extinguishing device is convenient to move to a fire point.
It should be further noted that, in the implementation process, the liquid nitrogen fire extinguisher 2 includes a liquid nitrogen storage module and a liquid nitrogen injection module, the liquid nitrogen storage module is a liquid nitrogen tank 9, and the liquid nitrogen injection module includes an automatic liquid nitrogen pump 10. Through the setting of liquid nitrogen jar 9 and automatic liquid nitrogen pump 10, open automatic liquid nitrogen pump 10 through controller 23, make the liquid nitrogen in the liquid nitrogen jar 9 pump up through automatic liquid nitrogen pump 10, then open valve 14 through controller 23, make the liquid nitrogen in the liquid nitrogen jar 9 spray to the ignition point through automatic liquid nitrogen pump 10, carry out fire prevention and extinguishing operations.
It should be further noted that, in the implementation process, the top of the automatic liquid nitrogen pump 10 is fixedly connected with a nitrogen delivery pipe 13, the top of the nitrogen delivery pipe 13 is fixedly connected with a valve 14, and one side of the nitrogen delivery pipe 13 far away from the limiting ring 4 is rotatably connected with a spray head 15. By the arrangement of the nitrogen pipe 13 and the injection head 15, the valve 14 is opened so that the liquid nitrogen gas is injected from the injection head 15 to the ignition point.
It should be further noted that, in the implementation, the other end of the spray head 15 is rotatably connected to a shower head 16. By the arrangement of the shower nozzle 16, the contact area between the sprayed liquid nitrogen and the air around the fire source is increased, and the fire extinguishing is further accelerated.
It should be further noted that, in the implementation process, the gas detector 17 is fixedly installed on one side of the side plate 3, the camera 21 is fixedly connected to the top of the side plate 3, and the smoke sensor 24, the temperature sensor 25 and the infrared sensor 26 are fixedly connected to one side of the side plate 3. The gas detector 17 and the camera 21 are both provided with 5G transmission modules, and when the gas detector 17 detects toxic and harmful gas on the scene of a fire, and then transmits the detected toxic and harmful gas to the terminal, monitors the concentration change of the toxic and harmful gas on the fire, and the camera 21 shoots videos or pictures on the scene of the fire, and then transmits the videos or pictures to the terminal. Is positioned to the location of the fire by the infrared sensor 26.
It should be further noted that, in the implementation process, the protection pad 18 is fixedly installed inside the limit ring 4. Through setting up protection pad 18 for alleviate spacing ring 4's slip collision, promote spacing ring 4 life.
It should be further noted that, in the specific implementation process, the electric push rod 19 is fixedly connected to the periphery of the bottom of the base 1, and the fixing claw 20 is fixedly connected to the bottom of the electric push rod 19. When the device moves to a fire point, the electric push rod 19 is opened, and the fixed claw 20 is fixed with the ground, so that the device is prevented from moving.
It should be further noted that, in the implementation process, the energy driving device 22 is fixedly connected to the inside of the base 1. The liquid nitrogen fire extinguishing device is driven by the energy driving device 22 to automatically move.
It should be further noted that, in the implementation process, a controller 23 is disposed on one side of the side plate 3, and the controller 23 is electrically connected to the energy driving device 22, the gas detector 17, the injection head 15, the switch 12, the valve 14, the smoke sensor 24, the temperature sensor 25, the camera 21, the automatic liquid nitrogen pump 10, and the infrared sensor 26. The automatic control of the device is realized through the controller 23, and the unmanned fire extinguishing effect is realized.
The roadway inspection liquid nitrogen fire extinguishing device provided by the utility model is further described below with reference to the accompanying drawings and the implementation mode.
Referring to fig. 1-4, a roadway inspection liquid nitrogen fire extinguishing device includes:
the base 1 is used for installing a liquid nitrogen fire extinguishing device;
a liquid nitrogen fire extinguisher 2, wherein the liquid nitrogen fire extinguisher 2 is arranged at the top of the base 1 and is used for spraying liquid nitrogen to extinguish fire; one side fixedly connected with curb plate 3 of base 1, the equal sliding connection in both sides bottom and the top of curb plate 3 has spacing ring 4, the one end fixedly connected with elastic webbing 5 of spacing ring 4, elastic webbing 5 cup joints in liquid nitrogen fire extinguisher 2 outside, the outside threaded connection of spacing ring 4 has fixing bolt 6, be equipped with evenly distributed's screw hole 7 on the curb plate 3, fixing bolt 6 runs through spacing ring 4 and through screw hole 7 and curb plate 3 threaded connection. It should be further noted that, in the specific implementation process, during the assembly, the fixing bolts 6 on the side plates 3 are loosened firstly, then the two limiting rings 4 are slid downwards to a proper position, then the liquid nitrogen fire extinguisher 2 is lifted manually and inserted into the two limiting rings 4, placed on the base 1, then the two limiting rings 4 are slid upwards to a proper position, the fixing bolts 6 are screwed to fix the liquid nitrogen fire extinguisher 2, during the assembly, the controller 23 drives the energy driving device 22 to patrol the roadway through the built-in program, when the smoke sensor 24 and the temperature sensor 25 detect the condition that smoke and temperature rise are nearby, the nearby fire is proved to be at a fire point, and the position of the fire point is located through the infrared sensor 26 ， The liquid nitrogen fire extinguishing device is moved to a position near a fire point through the moving wheel 8 by the controller 23, the automatic liquid nitrogen pump 10 is turned on by the controller 23, liquid nitrogen in the liquid nitrogen tank 9 is pumped up by the automatic liquid nitrogen pump 10, then the valve 14 is turned on by the controller 23, the liquid nitrogen in the liquid nitrogen tank 9 is sprayed to the fire point by the automatic liquid nitrogen pump 10, fire extinguishing operation is carried out, and fire extinguishing is completed.
In the description of the present utility model, it should be understood that the terms "open," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like indicate orientation or positional relationships, merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the components or elements 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 utility model.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (10)
1. The utility model provides a liquid nitrogen extinguishing device is patrolled and examined in tunnel which characterized in that includes:
the base (1) is used for installing a liquid nitrogen fire extinguishing device;
the liquid nitrogen fire extinguisher (2) is arranged at the top of the base (1) and is used for spraying liquid nitrogen to extinguish fire; one side fixedly connected with curb plate (3) of base (1), the equal sliding connection in both sides bottom and the top of curb plate (3) has spacing ring (4), the one end fixedly connected with elastic webbing (5) of spacing ring (4), elastic webbing (5) cup joint in liquid nitrogen fire extinguisher (2) outside, the outside threaded connection of spacing ring (4) has fixing bolt (6), be equipped with evenly distributed's screw hole (7) on curb plate (3), fixing bolt (6) run through spacing ring (4) and through screw hole (7) and curb plate (3) threaded connection.
2. The roadway inspection liquid nitrogen fire extinguishing device according to claim 1 is characterized in that moving wheels (8) are fixedly arranged at four corners of the bottom of the base (1).
3. The roadway inspection liquid nitrogen fire extinguishing device according to claim 1, wherein the liquid nitrogen fire extinguisher (2) comprises a liquid nitrogen storage module and a liquid nitrogen injection module, the liquid nitrogen storage module is a liquid nitrogen tank (9), and the liquid nitrogen injection module comprises an automatic liquid nitrogen pump (10).
4. A roadway inspection liquid nitrogen fire extinguishing device according to claim 3, characterized in that the top of the automatic liquid nitrogen pump (10) is fixedly connected with a nitrogen conveying pipe (13), the top of the nitrogen conveying pipe (13) is fixedly connected with a valve (14), and one side of the nitrogen conveying pipe (13) far away from the limiting ring (4) is rotatably connected with a spray head (15).
5. The roadway inspection liquid nitrogen fire extinguishing device according to claim 4, wherein the other end of the jet head (15) is rotatably connected with a shower head (16).
6. The roadway inspection liquid nitrogen fire extinguishing device according to claim 1, wherein one side of the side plate (3) is fixedly provided with a gas detector (17), the top of the side plate (3) is fixedly connected with a camera (21), and one side of the side plate (3) is fixedly connected with a smoke sensor (24), a temperature sensor (25) and an infrared sensor (26).
7. The roadway inspection liquid nitrogen fire extinguishing device according to claim 1, wherein a protective pad (18) is fixedly arranged in the limiting ring (4).
8. The roadway inspection liquid nitrogen fire extinguishing device according to claim 1, wherein electric push rods (19) are fixedly connected to the periphery of the bottom of the base (1), and fixing claws (20) are fixedly connected to the bottom of each electric push rod (19).
9. The roadway inspection liquid nitrogen fire extinguishing device according to claim 1, wherein an energy driving device (22) is fixedly connected to the inside of the base (1).
10. The roadway inspection liquid nitrogen fire extinguishing device according to claim 9, wherein a controller (23) is arranged on one side of the side plate (3), and the controller (23) is electrically connected with an energy driving device (22), a gas detector (17), an injection head (15), a valve (14), a smoke sensor (24), a temperature sensor (25), a camera (21), an automatic liquid nitrogen pump (10) and an infrared sensor (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321096819.3U CN220002826U (en) | 2023-05-08 | 2023-05-08 | Liquid nitrogen fire extinguishing device is patrolled and examined in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321096819.3U CN220002826U (en) | 2023-05-08 | 2023-05-08 | Liquid nitrogen fire extinguishing device is patrolled and examined in tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220002826U true CN220002826U (en) | 2023-11-14 |
Family
ID=88686747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321096819.3U Active CN220002826U (en) | 2023-05-08 | 2023-05-08 | Liquid nitrogen fire extinguishing device is patrolled and examined in tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220002826U (en) |
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2023
- 2023-05-08 CN CN202321096819.3U patent/CN220002826U/en active Active
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