CN115414620A - Liquid nitrogen extinguishing device based on preaction system - Google Patents
Liquid nitrogen extinguishing device based on preaction system Download PDFInfo
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- CN115414620A CN115414620A CN202210976890.4A CN202210976890A CN115414620A CN 115414620 A CN115414620 A CN 115414620A CN 202210976890 A CN202210976890 A CN 202210976890A CN 115414620 A CN115414620 A CN 115414620A
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- nitrogen
- liquid nitrogen
- tank
- valve
- fire extinguishing
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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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/05—Nozzles specially adapted for fire-extinguishing with two or more outlets
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
Abstract
The invention relates to a liquid nitrogen fire extinguishing device based on a preaction system, which comprises a nitrogen tank, a liquid nitrogen tank, a gas transmission pipeline connected with the output end of the nitrogen tank, a plurality of open nozzles arranged at the end part of the gas transmission pipeline, a nitrogen transmission pipeline connected with the output end of the liquid nitrogen tank and a plurality of closed nozzles arranged at the end part of the nitrogen transmission pipeline, wherein a detection device is arranged in a protection area; the controller is used for controlling the opening and closing of each pipeline; the invention can utilize the phase nitrogen and the liquid nitrogen to respectively extinguish fire, and can realize the mutual conversion from the nitrogen to the liquid nitrogen by utilizing the nitrogen making machine, thereby ensuring the continuous supply of the liquid nitrogen and realizing the cyclic utilization. Simultaneously combine liquid nitrogen container and preaction system, regard liquid nitrogen as main fire extinguishing agent direct action in the protected area, improve the fire extinguishing efficiency, can avoid the liquid nitrogen mistake to spout simultaneously and cause harmful effects to the protected area.
Description
Technical Field
The invention relates to a liquid nitrogen fire extinguishing device based on a pre-acting system.
Background
The liquid nitrogen has the unique advantages of no color, no odor, no corrosiveness, no combustibility, extremely low temperature and the like, so that the application in the fields of fire control, fire extinguishment and the like is continuously widened and developed. Existing systems use liquid nitrogen for fire protection and suppression in two ways. Firstly, directly pour into the protected area with the liquid nitrogen through the pipeline, because current system lacks nitrogen making equipment, can't guarantee the continuous supply of liquid nitrogen, can't carry out the longer action of putting out a fire of duration. Secondly, liquid nitrogen is used as an auxiliary fire extinguishing agent, and is injected into the fire area after being cooled by utilizing the cooling capacity of the auxiliary fire extinguishing agent, but the liquid nitrogen is gasified in a large amount and is basically in a gaseous state when entering the protection area, and the cooling capacity is weakened.
The invention discloses a comprehensive pipe gallery mobile liquid nitrogen fire extinguishing system, which comprises a nitrogen making assembly, a fire extinguishing assembly, a monitoring device and a nitrogen conveying pipeline, wherein the nitrogen making assembly is arranged on the comprehensive pipe gallery mobile liquid nitrogen fire extinguishing system; the movable fire extinguishing assembly comprises a liquid nitrogen storage tank and a liquid nitrogen booster pump, the liquid nitrogen storage tank is connected with the liquid nitrogen booster pump, the liquid nitrogen booster pump transmits liquid nitrogen to a branch pipe in the pipe gallery through a nitrogen transmission pipeline, and a nitrogen injection port is arranged on the branch pipe; the nitrogen making assembly is movable and transmits prepared liquid nitrogen to a liquid nitrogen storage tank; the monitoring device comprises a first monitoring component and a second monitoring component; the controller automatically adjusts the pressure in the liquid nitrogen storage tank and automatically supplements liquid nitrogen through the first monitoring assembly; the controller monitors the flow of the liquid nitrogen introduced into the nitrogen conveying pipeline through the second monitoring assembly.
And as the invention patent application with the publication number of CN104775843B, the invention discloses a liquid nitrogen fire-fighting system, which comprises a liquid nitrogen tank car, wherein the liquid nitrogen tank car is sequentially connected with a pump, a vertical shaft and a liquid nitrogen conveying main pipe, the liquid nitrogen conveying main pipe is respectively connected with a liquid nitrogen direct injection pipe used for injecting liquid nitrogen into a goaf and a liquid nitrogen gasification device used for gasifying the liquid nitrogen into nitrogen and then injecting the nitrogen into the goaf, an exhaust pipe is arranged in the goaf and connected with a return air pipeline, a first control valve is arranged on the exhaust pipe, and a sensor used for monitoring pressure intensity is also arranged in the goaf.
Above two current patent applications all utilize the liquid nitrogen to put out a fire as fire extinguishing agent, but all can't guarantee the continuous supply of liquid nitrogen.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the liquid nitrogen fire extinguishing device based on the pre-action system, which can ensure sufficient supply and continuous fire extinguishing of liquid nitrogen, and can directly extinguish fire in a protected area by using the liquid nitrogen as a main fire extinguishing agent, thereby improving the fire extinguishing efficiency.
The technical scheme adopted by the invention is as follows:
a liquid nitrogen fire extinguishing device based on a preaction system comprises a nitrogen tank, a liquid nitrogen tank, a gas transmission pipeline connected to the output end of the nitrogen tank, a plurality of open type nozzles arranged at the end part of the gas transmission pipeline, a nitrogen transmission pipeline connected to the output end of the liquid nitrogen tank and a plurality of closed type nozzles arranged at the end part of the nitrogen transmission pipeline, wherein a detection device is arranged in a protection area, the open type nozzles and the closed type nozzles are both arranged in the protection area, the preaction system is arranged on the nitrogen transmission pipeline, and a nitrogen generator is arranged between the nitrogen tank and the liquid nitrogen tank; the device also comprises a controller for controlling the opening and closing of each pipeline.
Furthermore, the pre-acting system comprises a pre-acting alarm valve and a signal valve which are arranged on the nitrogen conveying pipeline, the pre-acting alarm valve is connected with an electromagnetic valve, and the electromagnetic valve is controlled by a controller.
Furthermore, a first stop valve and a first check valve are sequentially arranged on the gas transmission pipeline from one end of the nitrogen tank.
Furthermore, a second check valve and a second stop valve are sequentially arranged on the nitrogen conveying pipeline from one end of the liquid nitrogen tank, and the second check valve is located behind the signal valve.
Furthermore, a switching pipeline is arranged between the nitrogen tank and the nitrogen conveying pipeline, one end of the switching pipeline is communicated with the nitrogen conveying pipeline, and a connecting point is positioned between the second check valve and the second stop valve; the other end of the switching pipeline is communicated with the input end of the nitrogen tank.
Furthermore, a third stop valve is arranged on the switching pipeline.
Furthermore, a circulating pipeline is arranged between the nitrogen tank and the liquid nitrogen tank, and a third check valve is arranged on the circulating pipeline.
Furthermore, a first monitoring assembly is arranged on the liquid nitrogen tank, the first monitoring assembly comprises a first pressure gauge and a first safety valve which are installed on the liquid nitrogen tank, and the first pressure gauge and the first safety valve are controlled by a controller.
Further, be equipped with the second monitoring subassembly on the nitrogen gas jar, the second monitoring subassembly is including installing the second manometer and the air outlet valve on the nitrogen gas jar.
Further, still be connected with exhaust device on the nitrogen gas jar, exhaust device includes exhaust pipe and sets up discharge valve and the motorised valve on exhaust pipe, exhaust pipe communicates with the gas vent of nitrogen gas jar.
The invention has the positive effects that:
the invention can utilize the phase nitrogen and the liquid nitrogen to respectively extinguish fire, and can realize the mutual conversion from the nitrogen to the liquid nitrogen by utilizing the nitrogen making machine, thereby ensuring the continuous supply of the liquid nitrogen and realizing the cyclic utilization.
Simultaneously combine liquid nitrogen container and preaction system, regard liquid nitrogen as main fire extinguishing agent direct action in the protected area, improve the fire extinguishing efficiency, can avoid the liquid nitrogen mistake to spout simultaneously and cause harmful effects to the protected area.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the structure of the present invention.
In the drawings there is shown in the drawings,
11-liquid nitrogen tank;
12-a nitrogen generator;
a 13-nitrogen tank;
21-a detection device;
22-an air outlet valve;
23-a first pressure gauge;
24-a first safety valve;
25-a second pressure gauge;
31-pre-acting alarm valves;
32-solenoid valves;
33-a signal valve;
34-a third stop valve;
35-a second stop valve;
36-a first stop valve;
37-a stop valve;
38-a third check valve;
39-a second check valve;
40-a first check valve;
41-an electric valve;
42-an exhaust valve;
51-a controller;
52-audible and visual alarm;
61-an exhaust duct;
62-a nitrogen pipeline;
63-gas transmission pipeline;
64-open sprinkler;
65-closed type spray head;
66-transfer line.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in attached figures 1 and 2, the device comprises a fire extinguishing assembly, a nitrogen generating assembly, a monitoring device, a pre-acting system assembly, an air exhausting assembly, a control assembly and a pipeline.
The fire extinguishing assembly comprises a liquid nitrogen tank 11 and a nitrogen tank 13, wherein an output end of the nitrogen tank 13 is connected with a gas transmission pipeline 63, a plurality of open type spray heads 64 at the end part of the gas transmission pipeline 63 are connected with a nitrogen transmission pipeline 62 at an output end of the liquid nitrogen tank 11, a plurality of closed type spray heads 65 are arranged at the end part of the nitrogen transmission pipeline 62, a detection device 21 is arranged in a protection area, and the open type spray heads 64 and the closed type spray heads 65 are arranged in the protection area. A pre-acting system is arranged on the nitrogen conveying pipeline 62, and a nitrogen making device 12 is arranged between the nitrogen tank 13 and the liquid nitrogen tank 11.
The nitrogen making component is a nitrogen making device 12, the prepared liquid nitrogen is transmitted to a liquid nitrogen tank 11 in a movable mode, and the input end of the nitrogen making device 12 is connected with a nitrogen tank 13.
The monitoring device comprises a plurality of detection devices 21, a first monitoring assembly and a second monitoring assembly. Each detection device 21 is correspondingly arranged at a corresponding position in the room and is used for monitoring the fire condition in the room. The first monitoring component is installed on the liquid nitrogen tank 11, and the second monitoring component is installed on the nitrogen tank 12.
The first monitoring assembly comprises a first pressure gauge 23 and a first safety valve 24 which are installed on the liquid nitrogen tank 11, the first pressure gauge 23 and the first safety valve 24 are controlled by a controller 51, and the second monitoring assembly comprises a second pressure gauge 25 and an air outlet valve 22 which are installed on the nitrogen tank 13.
The pre-acting system components include a pre-acting warning valve 31, a signal valve 33, a solenoid valve 32. The pre-acting alarm valve 31 and the signal valve 33 are connected with the output end of the liquid nitrogen tank 11, and the electromagnetic valve 32 is connected with the controller 51.
The control assembly includes a controller 51 and an audible and visual alarm 52. The controller 51 is connected with the first monitoring component and is used for pressure regulation in the liquid nitrogen tank 11; connected with the second monitoring assembly for pressure regulation inside the liquid nitrogen tank 11; the pre-acting system component is connected with the pre-acting system component and is used for controlling the on-off of the pre-acting system; is connected with the nitrogen generator 12 and is used for controlling the on-off and the liquid nitrogen conversion efficiency. The audible and visual alarm 52 is connected to the controller 51 for signaling a fire. The first pressure gauge 23, the first relief valve 24, the second pressure gauge 25 and the outlet valve 22 are all controlled by the controller 51.
The exhaust device comprises an exhaust pipeline 61, an exhaust valve 42 and an electric valve 41 which are arranged on the exhaust pipeline 61, the exhaust pipeline 61 is communicated with an exhaust port of the nitrogen tank 13, and the controller 51 controls the opening and closing of the exhaust valve 42 and the electric valve 41.
Further, the output end of the liquid nitrogen tank 11 is connected with the input end of the nitrogen tank 13, and a third check valve 38 is arranged between the output end and the nitrogen tank. The liquid nitrogen tank 11 is provided with a first monitoring assembly, and the third check valve 38 and the first monitoring assembly are both connected with the controller 51. When the value of the first pressure gauge 23 in the first monitoring assembly is not within the set value range, the controller 51 controls the nitrogen generator 12 to open and close and the third check valve 38 to open and close.
The first pressure gauge 23 on the liquid nitrogen tank 11 monitors the pressure inside the liquid nitrogen tank 11 in real time. When the pressure value is lower than the set interval, which means that the amount of liquid nitrogen in the liquid nitrogen tank 11 is small, the controller 51 controls the nitrogen generator 12 to start up to supply liquid nitrogen to the liquid nitrogen tank 11. When the pressure value is higher than the set interval, which indicates that the amount of liquid nitrogen in the liquid nitrogen tank 11 is large, the controller 51 controls the third check valve 38 to open, so that the liquid nitrogen enters the nitrogen gas tank 13.
Further, an exhaust valve 42 connected with the controller is arranged on the nitrogen tank 13. When the value of the second pressure gauge 25 in the second monitoring assembly exceeds the set value, the controller 51 controls the exhaust valve 42 to open.
Further, the output end of the nitrogen tank 13 is connected with the input end of the nitrogen generator 12, a valve is arranged between the output end and the nitrogen generator, and the controller 51 controls the opening and closing of the valve.
The pressure in the nitrogen tank 13 is monitored in real time through the second pressure gauge 25, and when the pressure value exceeds a set interval, the controller 51 controls the exhaust valve 42 to be opened to discharge redundant nitrogen for pressure relief. When the pressure value is within the set interval, the controller 51 controls the exhaust valve to close. When the pressure value is lower than the set interval, the controller 51 controls the third check valve 38 to open, so that the liquid nitrogen in the liquid nitrogen tank 11 enters the nitrogen gas tank 13 to be supplemented with the nitrogen gas.
The nitrogen generator 12 may generate nitrogen directly from air by a compressor, or may receive nitrogen directly from the nitrogen tank 13 to liquefy the nitrogen into liquid nitrogen. Therefore, the mutual conversion from nitrogen to liquid nitrogen and from liquid nitrogen to nitrogen is integrally realized, the cyclic utilization is realized, and the efficiency is higher.
Further, the controller 51 controls opening and closing of the pre-operation warning valve 31, the signal valve 33, and the solenoid valve 32.
Further, the audible and visual alarm 52 is used for emitting an audible and visual alarm signal.
When the temperature of the protected area is too high or open fire occurs, the detection device 21 is started to transmit a fire signal to the controller 51, and the controller 51 controls the audible and visual alarm 52 to send out alarm signals such as sound and light. The audible and visual alarm 52 is disposed at a location that is obvious and convenient for a person to view.
Further, the detection device is a temperature sensor and a light sensor.
The temperature sensor detects the temperature of the protection area, and the light sensor detects the light naked fire of the protection area.
Furthermore, the nitrogen making component and the liquid nitrogen tank 11, the liquid nitrogen tank 11 and the nitrogen tank 13, and the liquid nitrogen and the nitrogen tank and other components of the system are connected through low-temperature and high-pressure metal hoses.
When the invention is in a normal state, all the valves are in a closed state. When the pressure of the nitrogen gas in the nitrogen gas tank 13 is insufficient, the controller 51 controls the liquid nitrogen in the liquid nitrogen tank 11 to be delivered into the nitrogen gas tank 13, and the liquid nitrogen is converted into the nitrogen gas to be filled, so that the pressure in the nitrogen gas tank 13 reaches a set interval. When the pressure of the nitrogen in the nitrogen tank 13 is too high, the nitrogen in the nitrogen tank 13 can be firstly transmitted into the nitrogen generator 12, and then the nitrogen is converted into liquid nitrogen by the nitrogen generator 12 and transmitted into the liquid nitrogen tank 11 for nitrogen supplement. Because the first pressure gauge 23 is arranged on the liquid nitrogen tank 11, when the pressure monitored by the first pressure gauge 23 exceeds the set interval at the same time, the controller 51 controls the exhaust valve 42 on the nitrogen tank 13 to open for pressure relief.
When a fire disaster occurs in the protected area, the corresponding detection device 21 monitors a fire disaster signal and sends the fire disaster signal to the controller 51, and after the controller 51 receives the fire disaster signal, the audible and visual alarm 52 is controlled to send out an alarm signal on one hand to remind workers of the occurrence of the fire disaster in the protected area. On the other hand, the nitrogen tank 13 is opened, the first check valve 36 and the first check valve 40 are opened, and nitrogen is sprayed through the gas transmission pipeline 63 and the open type spray head 65 to carry out primary cooling and temperature reduction on the protected area. At the same time, the controller 51 opens the check second return valve 39, instructs the signal valve 33 to drive the solenoid valve 32 to open the pre-apply alarm valve 31, and the liquid nitrogen tank 11 waits for the next signal before sending liquid nitrogen to the stop valve 35 through the nitrogen delivery line 62 under the control of the controller 51. The nitrogen gas blowing and the liquid nitrogen conveying are carried out simultaneously.
If the fire is controlled, the temperature of the protection area does not rise continuously or the detection device 21 gives a false alarm, the blasting bead of the closed nozzle 65 cannot break, the controller 51 cannot receive a secondary fire signal for a long time, and the controller 51 controls the liquid nitrogen tank 11 to stop conveying liquid nitrogen and controls the nitrogen tank 13 to stop spraying nitrogen. The first stop valve 36 and the first check valve 40 are closed, and the third stop valve 34 is opened at the same time, so that the released liquid nitrogen is converted into nitrogen gas and stored in the nitrogen gas tank 13, and the nitrogen gas tank 13 is supplemented with nitrogen.
If the fire is not effectively controlled and the temperature of the protection area continues to rise, the blasting bead of the closed nozzle 65 is broken, the controller 51 receives a secondary fire signal, the nitrogen tank 13 is immediately closed to continue to discharge nitrogen, and the first stop valve 36 and the first check valve 40 are closed. At the same time, the second stop valve 35 is opened to allow the liquid nitrogen to continue to enter the protected area through the nitrogen delivery pipe 62 and to be sprayed through the closed nozzle 65. The liquid nitrogen will be diffused in the protection area, namely through the characteristics such as liquid nitrogen low temperature heat absorption, realize the quick fire extinguishing.
After the fire is extinguished, the controller 51 controls the liquid nitrogen tank 11 to stop delivering the liquid nitrogen, and after the temperature drops to a certain degree, that is, when the temperature of the detecting device 21 is not monitored and rises again, the controller 51 closes the pre-acting alarm valve 32, the signal valve 33, the second check valve 39 and the second stop valve 35.
Compared with the prior art, the invention has the following advantages:
1 the invention is provided with a nitrogen tank and a nitrogen generator. The output and the nitrogen gas jar input of liquid nitrogen container are connected, and when the nitrogen gas pressure in the nitrogen gas jar was not enough, the controller will control in the liquid nitrogen jar liquid nitrogen and carry to the nitrogen gas jar in, the liquid nitrogen turns into nitrogen gas and fills the dress. When the pressure of the nitrogen in the nitrogen tank is too high, the controller controls the nitrogen generator to convert the nitrogen into liquid nitrogen and transmits the liquid nitrogen to the liquid nitrogen tank for nitrogen supplement or directly discharges the liquid nitrogen. Meanwhile, the liquid nitrogen pressure in the liquid nitrogen tank can be adjusted, so that the liquid nitrogen and the nitrogen are mutually converted, the continuous supply of the liquid nitrogen and the nitrogen is ensured, and the fire cannot be timely extinguished when a fire disaster occurs.
2 the invention is provided with an air exhaust device. Under normal condition, the subassembly of airing exhaust is in closed condition, sends the conflagration signal when detecting device, and nitrogen gas jar and liquid nitrogen tank open are controlled to the controller, and the conflagration obtains the control back, has released the liquid nitrogen and has got into the nitrogen gas jar through defeated nitrogen pipe way. When the pressure in the nitrogen tank is too high, the exhaust assembly is opened, the pressure in the nitrogen tank is reduced in time, and accidents caused by too high pressure are avoided.
3 the invention is provided with a pre-action system component. After detecting device sent the conflagration signal, when carrying out nitrogen gas release cooling, the pipeline carries out the liquid nitrogen and fills dress, when the temperature rises once more, and the controller control liquid nitrogen spouts the pipeline valve and opens, and release liquid nitrogen is put out a fire, and is more high-efficient, improves the efficiency of putting out a fire. When the temperature does not rise continuously any more and the fire is controlled, the controller controls the gas transfer pipeline valve to be opened, the released liquid nitrogen is conveyed to the nitrogen tank for nitrogen supplement, the influence of excessive liquid nitrogen release on the environment is avoided, and resources are saved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A liquid nitrogen fire extinguishing device based on a pre-action system is characterized by comprising a nitrogen tank (13), a liquid nitrogen tank (11), a gas transmission pipeline (63) connected with the output end of the nitrogen tank (13), a plurality of open nozzles (64) arranged at the end part of the gas transmission pipeline (63), a nitrogen transmission pipeline (62) connected with the output end of the liquid nitrogen tank (11) and a plurality of closed nozzles (65) arranged at the end part of the nitrogen transmission pipeline (62), wherein a detection device (21) is arranged in a protection area, the open nozzles (64) and the closed nozzles (65) are both arranged in the protection area, the pre-action system is arranged on the nitrogen transmission pipeline (62), and a nitrogen generator (12) is arranged between the nitrogen tank (13) and the liquid nitrogen tank (11); the device also comprises a controller (51) for controlling the opening and closing of each pipeline.
2. A liquid nitrogen fire extinguishing apparatus based on pre-action system according to claim 1, characterized in that the pre-action system comprises a pre-action alarm valve (31) and a signal valve (33) arranged on the nitrogen transmission pipeline (62), the pre-action alarm valve (31) is connected with a solenoid valve (32), and the solenoid valve (32) is controlled by a controller (51).
3. The liquid nitrogen fire extinguishing apparatus based on the preaction system as claimed in claim 1, wherein the gas transmission pipeline (63) is provided with a first stop valve (36) and a first check valve (40) in sequence from one end of the nitrogen gas tank (13).
4. A liquid nitrogen fire extinguishing apparatus based on a pre-acting system according to claim 2, characterized in that a second check valve (39) and a second stop valve (35) are provided on the nitrogen delivery line (62) in order from the end of the liquid nitrogen tank (11), the second check valve (39) being located behind the signal valve (33).
5. A liquid nitrogen fire extinguishing apparatus based on a pre-acting system according to claim 4, characterized in that a switching line (66) is provided between the nitrogen gas tank (13) and the nitrogen delivery line (62), one end of the switching line (66) is communicated with the nitrogen delivery line (62), and the connection point is located between the second check valve (39) and the second stop valve (35); the other end of the switching pipeline (66) is communicated with the input end of the nitrogen tank (13).
6. A liquid nitrogen fire extinguishing apparatus based on a preaction system according to claim 5, characterized in that a third shut-off valve (34) is provided on the transfer line (66).
7. Liquid nitrogen fire extinguishing apparatus based on preaction system according to claim 1, characterized by the fact that between the nitrogen tank (13) and the liquid nitrogen tank (11) there is a circulation line, on which there is a third check valve (38).
8. The liquid nitrogen fire extinguishing apparatus based on preaction system according to claim 1, characterized in that a first monitoring component is arranged on the liquid nitrogen tank (11), the first monitoring component comprises a first pressure gauge (23) and a first safety valve (24) installed on the liquid nitrogen tank (11), and the first pressure gauge (23) and the first safety valve (24) are controlled by a controller (51).
9. A liquid nitrogen fire extinguishing apparatus based on pre-action system according to claim 1 or 8, characterized in that a second monitoring component is arranged on the nitrogen gas tank (13), the second monitoring component comprises a second pressure gauge (25) and an air outlet valve (22) installed on the nitrogen gas tank (13).
10. The liquid nitrogen fire extinguishing apparatus based on preaction system according to claim 9, characterized in that an exhaust device is further connected to the nitrogen gas tank (13), the exhaust device comprises an exhaust pipeline (61), and an exhaust valve (42) and an electric valve (41) arranged on the exhaust pipeline (61), and the exhaust pipeline (61) is communicated with the exhaust port of the nitrogen gas tank (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210976890.4A CN115414620A (en) | 2022-08-15 | 2022-08-15 | Liquid nitrogen extinguishing device based on preaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210976890.4A CN115414620A (en) | 2022-08-15 | 2022-08-15 | Liquid nitrogen extinguishing device based on preaction system |
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|---|---|
| CN115414620A true CN115414620A (en) | 2022-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210976890.4A Pending CN115414620A (en) | 2022-08-15 | 2022-08-15 | Liquid nitrogen extinguishing device based on preaction system |
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| CN (1) | CN115414620A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115957463A (en) * | 2022-12-15 | 2023-04-14 | 国网新疆电力有限公司电力科学研究院 | Mobile liquid nitrogen fire extinguishing device for cable trench and application method thereof |
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| CN111803831A (en) * | 2020-07-23 | 2020-10-23 | 中国矿业大学 | Fire prevention and control system and control method for lithium ion battery prefabricated cabin |
| CN111803826A (en) * | 2020-07-16 | 2020-10-23 | 中国矿业大学 | Movable liquid nitrogen fire extinguishing system for comprehensive pipe gallery and fire extinguishing method thereof |
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2022
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| CN1493374A (en) * | 2002-11-01 | 2004-05-05 | 张维顶 | Automatic water spraying fire extinguishing device |
| RU2253492C1 (en) * | 2004-01-21 | 2005-06-10 | Военный инженерно-технический университет | Volumetric fire-extinguishing method and device |
| CN110665157A (en) * | 2019-11-07 | 2020-01-10 | 三一石油智能装备有限公司 | Nitrogen supply system and fire fighting equipment |
| CN111803826A (en) * | 2020-07-16 | 2020-10-23 | 中国矿业大学 | Movable liquid nitrogen fire extinguishing system for comprehensive pipe gallery and fire extinguishing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115957463A (en) * | 2022-12-15 | 2023-04-14 | 国网新疆电力有限公司电力科学研究院 | Mobile liquid nitrogen fire extinguishing device for cable trench and application method thereof |
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