CN112843570A - Fire extinguishing device and fire extinguishing method for mixed injection of liquid nitrogen and carbon dioxide - Google Patents
Fire extinguishing device and fire extinguishing method for mixed injection of liquid nitrogen and carbon dioxide Download PDFInfo
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- CN112843570A CN112843570A CN202110111590.5A CN202110111590A CN112843570A CN 112843570 A CN112843570 A CN 112843570A CN 202110111590 A CN202110111590 A CN 202110111590A CN 112843570 A CN112843570 A CN 112843570A
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- 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
- A62C31/07—Nozzles specially adapted for fire-extinguishing with two or more outlets for different media
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
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Abstract
The invention discloses a fire extinguishing device with mixed injection of liquid nitrogen and carbon dioxide, which comprises liquid CO2Bottle and liquid nitrogen bottle, liquid CO fixed and inverted side by side2The outlet at the top of the bottle is connected with liquid CO2Conduit and disposing liquid CO2Liquid outlet valve, liquid CO2The tail end of the conduit is connected with liquid CO2Spray gun and liquid CO2A handle switch, a liquid nitrogen guide tube connected with the top outlet of the liquid nitrogen bottle and provided with a liquid nitrogen outlet valve, a liquid nitrogen spray gun connected with the tail end of the liquid nitrogen guide tube and provided with a liquid nitrogen handle switch, and liquid CO2The spray gun is opposite to the nozzle of the liquid nitrogen spray gun and is obliquely arranged; the invention also discloses a fire extinguishing method of the fire extinguishing device by mixed injection of liquid nitrogen/carbon dioxide, which is implemented by liquid CO2And liquid nitrogen is sprayed to form dry ice particles for extinguishing fire. The invention arranges the raw material storage medium and the output injection structure to inject the liquid CO2The fire extinguishing agent is converted into dry ice, so that the overall fire extinguishing performance is improved; the fire extinguishing method improves the fire extinguishing efficiency.
Description
Technical Field
The invention belongs to the technical field of fire extinguishing, and particularly relates to a fire extinguishing device and a fire extinguishing method for mixed injection of liquid nitrogen and carbon dioxide.
Background
At present, under the frequent trend of small fire in dense building groups, the traditional fire extinguishing technology is increasingly difficult to meet the fire extinguishing demand of people, if the small fire is difficult to control in the initial stage of fire, the consequence that the fire is difficult to estimate is caused after the fire expands and spreads into big fire, and therefore the fire extinguishing needs to be fast and sufficient. At present, the conventional fire extinguishing methods mainly comprise chemical foam, dry powder, carbon dioxide and water-based fire extinguishers, but the time, place and type of fire occurrence are difficult to predict, the general fire extinguishing method has large limitation, and the fire area is difficult to extinguish efficiently and quickly. Therefore, the development of the fire extinguishing device with wide applicability, long fire extinguishing time and good carrying capacity has important significance for improving the fire extinguishing capacity of urban fires.
Generally, the occurrence of fire is closely related to temperature and oxygen concentration, and the key to management is to isolate oxygen and remove heat. Research shows that carbon dioxide forms dry ice below the triple point (-56.6 ℃), the dry ice absorbs a large amount of heat in a fire area in the sublimation process to cause the temperature of the fire area to be reduced, and along with the generation of a large amount of gaseous carbon dioxide, oxygen in the fire area is effectively isolated, the extinguishing of a fire source is accelerated, and the dry ice is undoubtedly a fire extinguishing material with great development prospect if the dry ice can be attached to the fire source point. However, the carbon dioxide is unstable in nature and difficult to store in the form of dry ice and extinguish fire, and liquid carbon dioxide is only formed by a small amount of dry ice during spraying, so that the fire extinguishing performance is poor, and therefore, a device method for extinguishing fire by reusing carbon dioxide is still needed to be further researched.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a fire extinguishing device for mixed injection of liquid nitrogen and carbon dioxide, aiming at the defects of the prior art. The device is used for treating raw material liquid CO2And the arrangement of a liquid nitrogen storage medium, an output structure and an injection structure realizes the liquid CO in the liquid nitrogen2Is sufficiently cooled to make liquid CO2The dry ice particles are converted into the dry ice particles to be sprayed into a fire area, the dry ice particles are cooled and oxygen-isolated, the dry ice sublimation performance is used for isolating oxygen and retarding fire, and the liquid nitrogen is used for cooling and isolating oxygen to achieve positive dual fire extinguishing effects and improving the overall fire extinguishing performance.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a fire extinguishing device with mixed injection of liquid nitrogen and carbon dioxide is characterized by comprising liquid CO2Bottle and with liquid CO2Liquid nitrogen bottles with bottles fixed side by side and placed and inverted, wherein the liquid CO is2The outlet at the top of the bottle is connected with liquid CO2A conduit with liquid CO at the joint2Liquid outlet valve, said liquid CO2The tail end of the conduit is connected with liquid CO2Spray gun of said liquid CO2The connecting pipeline of the spray gun is provided with liquid CO2The handle switch, the top exit linkage of liquid nitrogen bottle has the liquid nitrogen pipe, and the junction is provided with liquid nitrogen and goes out the liquid valve, and the end-to-end connection of liquid nitrogen pipe has the liquid nitrogen spray gun, be provided with liquid nitrogen handle switch on the connecting tube of liquid nitrogen spray gun, liquid CO is liquid2The spray gun is opposite to the nozzle of the liquid nitrogen spray gun and is obliquely arranged.
The fire extinguishing device adopting mixed injection of liquid nitrogen and carbon dioxide is characterized in that the liquid CO is sprayed into the fire extinguishing device2The bottle and the inverted liquid nitrogen bottle are both fixed on a back support, and a back belt is arranged on the back support.
The fire extinguishing device adopting mixed injection of liquid nitrogen and carbon dioxide is characterized in that a nozzle of a liquid nitrogen spray gun and liquid CO are arranged2Nozzle of spray gunThe angle of inclination between alpha and alpha is 15-45 deg.
The fire extinguishing device for mixed injection of liquid nitrogen and carbon dioxide is characterized in that a pressurizing device is connected to a liquid nitrogen bottle.
The fire extinguishing device adopting mixed injection of liquid nitrogen and carbon dioxide is characterized in that a liquid nitrogen conduit and liquid CO are arranged2Conduit, liquid nitrogen lance and liquid CO2The outer surface of the spray gun is coated with heat insulation materials.
The fire extinguishing device for mixed injection of liquid nitrogen/carbon dioxide is characterized in that the liquid nitrogen spray gun is close to a liquid nitrogen handle switch and is connected with liquid CO2Near liquid CO on the lance2The handle switch is fixedly connected through a connecting piece.
The fire extinguishing device adopting mixed injection of liquid nitrogen and carbon dioxide is characterized in that a liquid nitrogen handle switch and liquid CO are arranged2The handle switch is a push type handle switch.
In addition, the invention also provides a fire extinguishing method of the fire extinguishing device with the mixed injection of liquid nitrogen and carbon dioxide, which is characterized by comprising the following steps:
step one, spraying liquid CO in a fire extinguishing device by mixing liquid nitrogen/carbon dioxide2Liquid CO is filled into the bottle and the liquid nitrogen bottle correspondingly2And liquid nitrogen, then inverting the liquid nitrogen bottle and mixing with liquid CO2The bottles are fixedly placed side by side and then connected with other structural components to obtain the assembled fire extinguishing device;
step two, transferring the fire extinguishing device assembled in the step one to a fire area, and then opening liquid CO2A liquid outlet valve for discharging liquid CO2The lance and the liquid nitrogen lance are aligned to the flame and liquid CO is turned on2A handle switch is used for rapidly and sequentially opening the liquid nitrogen outlet valve and the liquid nitrogen handle switch to ensure that liquid CO is in a liquid state2Spraying liquid nitrogen to form dry ice particles for fire extinguishing;
step three, finishing the fire extinguishing operation or liquid CO2After the liquid nitrogen is exhausted, the liquid nitrogen outlet valve is closed in time, and then the liquid CO is slowly closed2Liquid outlet valve, then liquid CO is closed2The handle switch and the liquid nitrogen handle switch are used for disassembling or reassembling the fire extinguishing device.
The carbon dioxide is present in different forms under different circumstances. From the three-phase diagram of carbon dioxide in FIG. 1, liquid CO is shown2During the spraying process, the temperature is also greatly reduced due to the sharp reduction of the pressure, and the generation of the dry ice is accompanied, but the cold energy is quickly dissipated during the spraying process, so that the quantity of the dry ice is small overall.
The temperature of liquid nitrogen under standard atmospheric pressure is generally-196 ℃, and the invention utilizes the triphase transition property of carbon dioxide and the low-temperature performance of liquid nitrogen to carry out CO conversion in liquid state2The spraying process of (1) adopts liquid nitrogen for spraying and cooling, and liquid CO is used for spraying and cooling2Continuous instantaneous impact collision with liquid nitrogen to make liquid CO2The dry ice particles are rapidly cooled to the temperature below-56.6 ℃ of the phase transition point, so that a large amount of dry ice particles are continuously generated for fire extinguishing operation, the generation amount of the dry ice particles is effectively increased, and the fire extinguishing efficiency is improved; the dry ice sublimes fast after meeting fire inflation, has absorbed a large amount of heats in the fire district, can reach high efficiency, spray abundant fire extinguishing effect, and dry ice granule and liquid nitrogen compound in coordination have strengthened fire extinguishing effect.
Compared with the prior art, the invention has the following advantages:
1. the fire extinguishing device for mixed injection of liquid nitrogen/carbon dioxide is used for extinguishing raw material liquid CO2And the arrangement of a liquid nitrogen storage medium, an output structure and an injection structure realizes the liquid CO in the liquid nitrogen2Is sufficiently cooled to make liquid CO2The dry ice particles are converted into the dry ice particles to be sprayed into a fire area, the dry ice particles are cooled and oxygen-isolated, the dry ice sublimation performance is used for isolating oxygen and retarding fire, and the liquid nitrogen is used for cooling and isolating oxygen to achieve positive dual fire extinguishing effects and improving the overall fire extinguishing performance.
2. The fire extinguishing device for mixed injection of liquid nitrogen/carbon dioxide increases raw material CO by arranging the back support and the braces2And the loading capacity of liquid nitrogen, the overall fire extinguishing performance is improved, meanwhile, the device is convenient to carry and use by operators, flexible and mobile, and the fire extinguishing efficiency is improved.
3. Liquid nitrogen/dioxygen of the inventionThe fire extinguishing device for the mixed injection of carbon dioxide controls the nozzle of a liquid nitrogen spray gun and liquid CO2The inclination angle between the nozzles of the spray gun effectively strengthens the liquid nitrogen and the secondary liquid CO2Thereby improving the effect of liquid nitrogen on liquid CO2The cooling effect and the cooling efficiency of (2) and the generation amount of the dry ice particles are improved.
4. The fire extinguishing device for mixed injection of liquid nitrogen/carbon dioxide is provided with a liquid nitrogen handle switch and liquid CO2The handle switch is used for respectively controlling the liquid nitrogen and the liquid CO2The spraying flow rate and the spraying speed effectively control the generation amount and the generation speed of the dry ice particles.
5. The fire extinguishing device with the mixed injection of the liquid nitrogen and the carbon dioxide can extinguish fires of general A, B, C, E and the like, overcomes the defects of the traditional fire extinguishing device, and has wide application range and high application value.
6. The invention utilizes the triphase transition property of carbon dioxide and the low-temperature performance of liquid nitrogen to carry out CO conversion in liquid state2The spraying process in adopt liquid nitrogen to spray the cooling, effectively increased the formation volume of dry ice granule to improve fire extinguishing efficiency, reach quick high efficiency, spray abundant fire extinguishing effect.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a three-phase diagram of carbon dioxide.
FIG. 2 is a front view of the fire extinguishing unit with mixed liquid nitrogen/carbon dioxide injection according to the present invention.
FIG. 3 is a left side view of the fire suppression apparatus for mixed liquid nitrogen/carbon dioxide injection of the present invention.
FIG. 4 shows the liquid nitrogen spray gun and liquid CO in the fire extinguishing apparatus with mixed injection of liquid nitrogen/carbon dioxide according to the present invention2The structure of the spray gun is shown schematically.
Description of reference numerals:
1-liquid CO2A bottle; 2-liquid nitrogen bottle; 3-liquid CO2A liquid outlet valve;
4-liquid nitrogen outlet valve; 5-liquid CO2A conduit; 6-liquid nitrogen conduit;
7-liquid CO2A handle switch; 8-liquid nitrogen handle switch; 9-a connecting piece;
10-liquid CO2A spray gun; 11-liquid nitrogen spray gun; 12-backing;
13-carrying strap.
Detailed Description
The fire extinguishing apparatus with mixed injection of liquid nitrogen/carbon dioxide according to the present invention is described in detail by example 1.
Example 1
As shown in FIGS. 2 and 3, the fire extinguishing apparatus of the mixed injection of liquid nitrogen/carbon dioxide of the present embodiment includes liquid CO2Bottle 1 and with liquid CO2Bottle 1 is a liquid nitrogen bottle 2 which is fixed side by side and placed and inverted, and the liquid CO is2The top outlet of the bottle 1 is connected with liquid CO2A conduit 5 with liquid CO at the joint2Outlet valve 3, said liquid CO2The end of the conduit 5 is connected with liquid CO2Spray gun 10, said liquid CO2The connecting pipe of the spray gun 10 is provided with liquid CO2Handle switch 7, the top exit linkage of liquid nitrogen bottle 2 has liquid nitrogen pipe 6, and the junction is provided with liquid nitrogen and goes out liquid valve 4, and the end-to-end connection of liquid nitrogen pipe 6 has liquid nitrogen spray gun 11, be provided with liquid nitrogen handle switch 8 on liquid nitrogen spray gun 11's the connecting tube, liquid CO2The lance 10 is arranged opposite to the nozzle of the liquid nitrogen lance 11 and is inclined.
The fire extinguishing device for mixed injection of liquid nitrogen/carbon dioxide of the embodiment is provided with the liquid CO which is fixedly arranged side by side2Bottle 1 and inverted liquid nitrogen bottle 2 for storing liquid CO respectively2Bottle and liquid nitrogen due to liquid CO2Liquid CO in bottle2The liquid CO has the pressure of 2-3 MPa, and the liquid nitrogen has no additional pressure, so that the liquid CO is mixed with the gas2The liquid nitrogen bottle 2 is arranged in an inverted state with the bottle 1 arranged in a positive position, which is beneficial to the smooth outflow of liquid nitrogen and simultaneously ensures the liquid CO2And the safety of use of liquid nitrogen;
by in liquid CO2The bottom outlet of the bottle 1 is connected with liquid CO2Catheter tube5. In liquid CO2The end of the conduit 5 is connected with liquid CO2Spray gun 10 for ensuring liquid CO2Liquid CO in bottle 12By liquid CO2The conduit 5 flows out and delivers to liquid CO2The spray gun 10 sprays out and simultaneously liquid CO is arranged2Liquid outlet valve 3 for controlling liquid CO2Opening and closing of the bottle 1 to control or prevent liquid CO2Combined with liquid CO2The handle switch 7 controls the liquid CO2From liquid CO2The ejection flow rate and ejection rate in the spray gun 10;
the outlet at the top of the liquid nitrogen bottle 2 is connected with a liquid nitrogen guide pipe 6, the tail end of the liquid nitrogen guide pipe 6 is connected with a liquid nitrogen spray gun 11, so that liquid nitrogen in the liquid nitrogen bottle 2 flows out through the liquid nitrogen guide pipe 6 and is conveyed to the liquid nitrogen spray gun 11 to be sprayed out, meanwhile, the opening and closing of the liquid nitrogen bottle 2 are controlled by arranging a liquid nitrogen outlet valve 4 to control or prevent the liquid nitrogen from flowing out, and the spraying flow and the spraying speed of the liquid nitrogen from the liquid nitrogen spray gun 11 are controlled by combining a liquid nitrogen handle switch 8;
in addition, by separately providing a liquid nitrogen conduit 6 and liquid CO2The guide pipe 5 and the spray gun correspondingly connected with the guide pipe avoid liquid nitrogen and liquid CO2Premixing to generate dry ice to block a pipeline; by introducing liquid CO2The nozzle of the lance 10 is arranged opposite to and inclined with respect to the nozzle of the liquid nitrogen lance 11 so that the liquid nitrogen sprayed from the nozzle of the liquid nitrogen lance 11 and the liquid CO are injected from the liquid2Liquid CO sprayed from the nozzle of the lance 102The liquid CO is collided and rapidly mixed by continuous impact at a certain angle, and the low-temperature property of the liquid nitrogen is utilized to mix the liquid CO2Rapidly cooling to a temperature below-56.6 ℃ of phase transition point to continuously generate a large amount of dry ice particles, driving the dry ice to continuously spray into a fire area by liquid nitrogen, effectively cooling and isolating oxygen due to good adhesion of the dry ice particles to effectively adhere to the surface of a combustion object in the fire area, playing a fire extinguishing role, and then rapidly subliming the dry ice when the dry ice is heated in the fire and converting the dry ice into gaseous CO2The dry ice can absorb a large amount of heat generated by the combustion object in the sublimation process, so that the combustion temperature of the combustion object is continuously reduced, and the combustion is prevented from proceeding; at the same time, due to CO2The nature of the heavy gas, i.e. the density, is greater than that of air, gaseous CO2Covered on the burnerA protective layer is formed on the surface of the burning object, so that oxygen is effectively isolated, the burning object is further prevented from being continuously burnt, and the aim of quickly extinguishing the fire is fulfilled; in addition, the liquid nitrogen also has the functions of temperature reduction and oxygen insulation after being sprayed into a fire area, and also has the functions of fire extinguishing and flame retarding.
In conclusion, the fire extinguishing device for mixed injection of liquid nitrogen and carbon dioxide in the embodiment adopts the way of spraying liquid CO on the raw material2And the arrangement of a liquid nitrogen storage medium, an output structure and an injection structure realizes the liquid CO in the liquid nitrogen2Is sufficiently cooled to make liquid CO2The dry ice particles are converted into the dry ice particles to be sprayed into a fire area, the dry ice particles are cooled and oxygen-isolated, the dry ice sublimation performance is used for isolating oxygen and retarding fire, and the liquid nitrogen is used for cooling and isolating oxygen to achieve positive dual fire extinguishing effects and improving the overall fire extinguishing performance.
Preferably, the liquid CO is present in this embodiment2The bottle 1 and the inverted liquid nitrogen bottle 2 are both fixed on a back support 12, and a back belt 13 is arranged on the back support 12. By this arrangement, liquid CO is increased2The volumes of the bottle 1 and the liquid nitrogen bottle 2 are increased, and further the raw material CO is added2And the loading capacity of liquid nitrogen, the overall fire extinguishing performance is improved; simultaneously, it is more to compare the fire extinguishing medium that hand fire extinguisher formed, and the time of putting out a fire is longer, compares large-scale extinguishing device, portable, transportation more to make things convenient for the operator to bear and in the regional operation of putting out a fire of scene of a fire, nimble flexible, improved fire extinguishing efficiency.
As shown in FIG. 4, preferably, the nozzle of the liquid nitrogen lance 11 and the liquid CO are arranged in the present embodiment2The angle of inclination α between the nozzles of the lance 10 is 15 ° to 45 °. The inclination angle is the central line of the nozzle of the liquid nitrogen spray gun 11 and the liquid CO2The angle of the centre line of the nozzle of lance 10, by virtue of the preferred angle of inclination, further enhances the mixing of the liquid nitrogen sprayed from the nozzle of liquid nitrogen lance 8 with the liquid CO2Liquid CO sprayed from the nozzle of the lance 102The continuous impact effect enhances the micro-mixing effect, strengthens the mixing outside the direct impact area, and avoids the existence of dead areas, thereby improving the effect of liquid nitrogen on liquid CO2The cooling effect and the cooling efficiency of (2) and the generation amount of the dry ice particles are improved.
Preferably, a pressurizing device is connected to the liquid nitrogen bottle 2 in the embodiment. The liquid nitrogen can flow out through the pressurizing device, the flow speed of the liquid nitrogen is effectively increased, the liquid nitrogen can be smoothly sprayed out from the liquid nitrogen spray gun 11, and the liquid nitrogen cannot be blocked easily.
Preferably, in this embodiment the liquid nitrogen conduit 6, liquid CO2Conduit 5, liquid nitrogen lance 11 and liquid CO2The outer surface of the spray gun 10 is coated with a thermal insulation material. Due to liquid nitrogen and liquid CO2Due to the low temperature characteristics of the liquid nitrogen, the liquid nitrogen guide pipe 6, the liquid nitrogen spray gun 11 and the liquid CO can flow through2 Conduit 5 and liquid CO2The surface temperature of the spray gun 10 is reduced, and the operator is prevented from being hurt by frostbite caused by contacting each conduit and the spray gun in the using process by coating the heat insulation material.
Preferably, the liquid nitrogen spray gun 11 of the embodiment is close to the liquid nitrogen handle switch 8 and is connected with liquid CO2Near liquid CO on lance 102The handle switch 7 is fixedly connected with the connecting piece 9. By the arrangement, the liquid nitrogen spray gun 11 and liquid CO are enabled to be communicated2The spray gun 10 is fixedly connected, forms a fixed inclination angle and has a certain distance, and effectively improves liquid nitrogen and liquid CO2The impact process of (2) further increasing the generation amount of dry ice particles; meanwhile, the two spray guns are convenient to hold, fix and use, and an operator can easily carry out liquid nitrogen handle switch 8 and liquid CO2The handle switch 7 is used for adjusting and controlling the injection flow and the injection rate.
Preferably, in this embodiment, the liquid nitrogen hand switch 8 and the liquid CO2The handle switch 7 is a push type handle switch. The optimized switch is convenient to operate and easy to control liquid nitrogen and liquid CO2The spraying from the corresponding spray gun is easy to realize and the cost is lower.
The fire extinguishing method of the fire extinguishing apparatus by mixed injection of liquid nitrogen/carbon dioxide of the present invention is described in detail by example 2.
Example 2
The fire extinguishing method of the fire extinguishing device with mixed injection of liquid nitrogen and carbon dioxide in the embodiment comprises the following steps:
step one, mixing liquid nitrogen/carbon dioxideLiquid CO in a sprayed fire extinguishing device2Liquid CO is filled into the bottle 1 and the liquid nitrogen bottle 2 correspondingly2And liquid nitrogen, then inverting the liquid nitrogen bottle 2 and mixing with liquid CO2Bottles 1 are fixed side by side and sequentially placed in liquid CO2The top outlet of the bottle 1 is connected with a liquid nitrogen conduit 6 and a liquid nitrogen spray gun 11, a liquid nitrogen outlet valve 4 is arranged at the outlet connection part of the liquid nitrogen bottle 2, a liquid nitrogen handle switch 8 is arranged on the liquid nitrogen spray gun 11, and liquid CO is sequentially filled in the liquid nitrogen spray gun2The bottom outlet of the bottle 1 is connected with liquid CO2Conduit 5 and liquid CO2Spray gun 10 and in liquid CO2The outlet connection of the bottle 1 is provided with liquid CO2A liquid outlet valve 3 for discharging CO in liquid state2Liquid CO is mounted on the spray gun 102A handle switch 7 to obtain an assembled fire extinguishing apparatus;
step two, transferring the fire extinguishing device assembled in the step one to a fire area, and then opening liquid CO2A liquid outlet valve 3 for discharging liquid CO2Spray gun 10 and liquid nitrogen spray gun 11 are aligned to the flame and liquid CO is turned on2A handle switch 7 is used for rapidly and sequentially opening a liquid nitrogen outlet valve 4 and a liquid nitrogen handle switch 8, so that liquid CO is obtained2Spraying liquid nitrogen to form dry ice particles for extinguishing fire, and regulating liquid CO according to fire intensity in fire area2The liquid CO is regulated by a handle switch 7 and a liquid nitrogen handle switch 82And the ejection flow rate of liquid nitrogen, thereby controlling the generation amount of dry ice particles;
step three, finishing the fire extinguishing operation or liquid CO2After the liquid nitrogen is exhausted, the liquid nitrogen outlet valve 4 is closed in time, and then the liquid CO is slowly closed2The liquid outlet valve 3 is closed, and then liquid CO is closed2A handle switch 7 and a liquid nitrogen handle switch 8 for disassembling or reassembling the fire extinguishing device.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
Claims (8)
1. A fire extinguishing device with mixed injection of liquid nitrogen and carbon dioxide is characterized in that,comprising liquid CO2Bottle (1) and with liquid CO2The bottles (1) are fixed side by side and placed and inverted liquid nitrogen bottles (2), and the liquid CO is2The outlet at the top of the bottle (1) is connected with liquid CO2A conduit (5) with liquid CO at the joint2A liquid outlet valve (3), the liquid CO2The tail end of the conduit (5) is connected with liquid CO2Spray gun (10), said liquid CO2The connecting pipeline of the spray gun (10) is provided with liquid CO2Handle switch (7), the top exit linkage of liquid nitrogen bottle (2) has liquid nitrogen pipe (6), and the junction is provided with liquid nitrogen and goes out liquid valve (4), and the end-to-end connection of liquid nitrogen pipe (6) has liquid nitrogen spray gun (11), be provided with liquid nitrogen handle switch (8) on the connecting tube of liquid nitrogen spray gun (11), liquid CO handle switch (8) are gone up to liquid CO2The spray gun (10) is opposite to the nozzle of the liquid nitrogen spray gun (11) and is arranged in an inclined way.
2. Fire extinguishing apparatus with mixed injection of liquid nitrogen/carbon dioxide according to claim 1, characterized in that the liquid CO is2The bottle (1) and the inverted liquid nitrogen bottle (2) are both fixed on a back support (12), and a strap (13) is arranged on the back support (12).
3. Fire extinguishing apparatus with mixed injection of liquid nitrogen/carbon dioxide according to claim 1, characterized in that the nozzle of the liquid nitrogen lance (11) is connected with liquid CO2The inclination angle alpha between the nozzles of the spray gun (10) is 15-45 degrees.
4. A fire extinguishing apparatus with mixed injection of liquid nitrogen/carbon dioxide according to claim 1, characterized in that a pressure boosting device is connected to the liquid nitrogen bottle (2).
5. Fire extinguishing device with mixed injection of liquid nitrogen/carbon dioxide according to claim 1, characterized in that the liquid nitrogen conduit (6), liquid CO2A conduit (5), a liquid nitrogen spray gun (11) and liquid CO2The outer surfaces of the spray guns (10) are all coated with heat insulation materials.
6. According to claim 1The fire extinguishing device with mixed injection of liquid nitrogen and carbon dioxide is characterized in that the liquid nitrogen spray gun (11) is close to a liquid nitrogen handle switch (8) and is connected with liquid CO2Near the liquid CO on the lance (10)2The handle switch (7) is fixedly connected with the connecting piece (9).
7. Fire extinguishing device with mixed injection of liquid nitrogen/carbon dioxide according to claim 1, characterized by the fact that the liquid nitrogen hand switch (8) and the liquid CO2The handle switches (7) are all push type handle switches.
8. A fire extinguishing method using a liquid nitrogen/carbon dioxide mixed jet fire extinguishing apparatus according to any one of claims 1 to 7, characterized by comprising the steps of:
step one, spraying liquid CO in a fire extinguishing device by mixing liquid nitrogen/carbon dioxide2Liquid CO is filled into the bottle (1) and the liquid nitrogen bottle (2) correspondingly2And liquid nitrogen, then inverting the liquid nitrogen bottle (2) and mixing with liquid CO2The bottles (1) are fixedly placed side by side and then connected with other structural components to obtain the assembled fire extinguishing device;
step two, transferring the fire extinguishing device assembled in the step one to a fire area, and then opening liquid CO2A liquid outlet valve (3) for discharging liquid CO2The lance (10) and the liquid nitrogen lance (11) are aligned to the flame and liquid CO is turned on2A handle switch (7) is used for rapidly and sequentially opening a liquid nitrogen outlet valve (4) and a liquid nitrogen handle switch (8) to ensure that liquid CO is in a liquid state2Spraying liquid nitrogen to form dry ice particles for fire extinguishing;
step three, finishing the fire extinguishing operation or liquid CO2After the liquid nitrogen is exhausted, the liquid nitrogen outlet valve (4) is closed in time, and then the liquid CO is slowly closed2The liquid outlet valve (3) is closed, and then liquid CO is closed2A handle switch (7) and a liquid nitrogen handle switch (8) for disassembling or reassembling the fire extinguishing device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115318168A (en) * | 2022-03-25 | 2022-11-11 | 北京航天试验技术研究所 | Low-temperature slurry preparation and concentration regulation device and method |
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| CN108005712A (en) * | 2017-12-08 | 2018-05-08 | 西安安备特安防科技有限公司 | A kind of deep cooling noble gas system avenges fire extinguishing method and device |
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| CN209621382U (en) * | 2019-02-27 | 2019-11-12 | 兵航安全技术(天津)有限公司 | Liquid nitrogen and carbon dioxide fire prevention and extinguishment system |
| CN211752077U (en) * | 2020-01-19 | 2020-10-27 | 章丘昊星商贸有限公司 | Mixed jet fire-fighting system |
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