CN219090925U - Mixed fire extinguishing agent fire extinguishing system - Google Patents

Abstract

The utility model relates to the technical field of fire-fighting equipment, in particular to a mixed fire-extinguishing agent fire-extinguishing system, which comprises a liquid nitrogen bottle group, a dry powder bottle group, a mixer, a spraying device and a control system, wherein the liquid nitrogen bottle group and the dry powder bottle group are respectively connected with the mixer, and one end of the mixer is connected with the spraying device; the liquid nitrogen bottle group is also connected with a pressurizing gas bottle group, and the pressurizing gas bottle group is connected with the injection device; the control system controls the liquid nitrogen bottle group, the dry powder bottle group and the pressurizing gas bottle group. According to the utility model, the liquid nitrogen extinguishing agent is mixed with the dry powder extinguishing agent to extinguish the fire, and the dry powder extinguishing agent is pressurized for the second time after the liquid nitrogen is vaporized, so that the dry powder extinguishing agent can be conveyed to a far end, and meanwhile, the sprayed dry powder extinguishing agent has sufficient kinetic energy to penetrate the flame and directly support against the root of the flame, thereby improving the extinguishing efficiency and preventing the re-combustion; meanwhile, after the incompletely vaporized liquid nitrogen mixed dry powder extinguishing agent is sprayed out, the incompletely vaporized liquid nitrogen mixed dry powder extinguishing agent is vaporized again, so that a large amount of heat can be absorbed, the temperature of a fire scene is reduced, and the fire extinguishing agent is beneficial to extinguishment.

Description

Mixed fire extinguishing agent fire extinguishing system

Technical Field

The utility model relates to the technical field of fire-fighting equipment, in particular to a mixed fire-extinguishing agent fire-extinguishing system.

Background

The traditional fire-fighting device is generally a fire-fighting water monitor or a dry powder fire extinguisher, etc. The fire water cannon has the advantages of long water flow range, relatively low cost, good re-combustion resistance, good cooling and heat absorption effects, low fire extinguishing efficiency and long fire extinguishing time. The dry powder fire extinguisher has higher fire extinguishing efficiency, but the dry powder in the prior art cannot realize ultra-long-distance injection due to the matrix components of the dry powder, and the anti-afterburning capability and the cooling and heat absorbing effects are relatively poor; some fire extinguishing devices can spray one or two fluids of water, dry powder or gas, and can not achieve effective fire extinguishing effect according to the actual fire scene under special conditions such as deep forest fire, high-rise fire and the like. The range of the water flow is far, but the gravity of the water flow in the air is large, the injection speed is limited, the range is still relatively low, and the water is used for fire treatment, so that a plurality of inconveniences exist in a modern electrified environment. And because the traditional dry powder fire extinguishing range is closer, the traditional dry powder injection method can not drive the dry powder to a far fire scene.

The existing compressed gas dry powder fire extinguishing mainly adopts a mixed injection mode of inert gas and dry powder for fire extinguishing.

The normal pressure type compressed gas dry powder extinguishing device is characterized in that a compressor or a compressed gas steel cylinder is generally adopted for gas supply, the gas supply quantity of the compressor and the compressed gas steel cylinder is limited, the requirement of high-flow high-pressure gas supply cannot be met, if the high-flow high-pressure gas supply is required to be realized, a plurality of compressors or compressed gas steel cylinders are required to be arranged, the occupied space is large, the arrangement space is not needed in the area with limited space, and the on-site arrangement is not facilitated; another type of single gas storage type dry powder extinguishing is to store high-pressure gas in a fire extinguishing agent container, and the compressed gas is consumed in a large amount during large-flow injection, so that the injection pressure is also greatly reduced.

The Chinese patent publication No. CN214260452U discloses a multi-phase spraying combined fire extinguishing device, which is characterized in that a high-pressure nitrogen cylinder, a dry powder storage tank and a gas-solid mixer are arranged, high-pressure nitrogen can drive dry powder to be sprayed directly, and the high-pressure nitrogen can be mixed with the dry powder in the gas-solid mixer to be sprayed, so that the dry powder spraying range is improved. The jet nozzle is arranged into an inner nozzle and an outer nozzle, the inner nozzle is connected with the gas-solid mixer, the outer nozzle is indirectly connected with the water tank, the high-pressure water jet, the dry powder and the nitrogen mixture are sprayed outwards simultaneously, the gas-liquid-solid three-phase spraying combined fire extinguishing is realized, the carrying effect of the gas-filled gas on liquid and solid is strong, the spraying range is far, and the fire extinguishing efficiency is high. The gas-solid mixer can only circulate nitrogen to enable the nitrogen to enter the internal nozzle, the external nozzle is a water jet, and the carrying effect of high-pressure nitrogen can improve the range of the water jet. The device has the characteristics of long range, switching of various fire extinguishing modes, multi-phase injection combined fire extinguishing, flexible and changeable flow, high fire extinguishing efficiency, strong re-combustion resistance, and strong cooling and heat absorbing effects. According to the scheme, an external pressure storage type structure is adopted (pressurized gas and a dry powder extinguishing agent are stored separately, a dry powder storage tank is not pressurized), dry powder is driven to be sprayed through once mixing high-pressure nitrogen, and when fire is extinguished, the high-pressure nitrogen is used for pressurizing the interior of the dry powder storage tank once (mixing is the same), the spraying distance is 6-15m, so that the spraying distance of the dry powder is limited, multi-scene application cannot be met, meanwhile, the application of water can increase the viscosity of the dry powder, the dry powder is not easy to scatter after spraying, and the ultra-long-distance spraying is not facilitated, so that the dry powder is heavy.

Under the continuous development of technology, unmanned aerial vehicle technology is mature day by day and is applied to in a plurality of fields, wherein fire control unmanned aerial vehicle is used for the putting out a fire in high-rise building fire, the field of putting out a fire in high-rise building fire will be a great breakthrough, how to use unmanned aerial vehicle technology to put out a fire in high-rise building fire will be a meaningful project, but because the high temperature turbulence above the fire causes unmanned aerial vehicle unable too close the fire, and current unmanned aerial vehicle fire extinguishing agent that is applied to fire control sprays the fire extinguishing agent and sprays the fire extinguishing agent only by relying on the drawing the fire to put out a fire, not only promote unmanned aerial vehicle's damage probability greatly and promote fire extinguishing cost greatly, moreover because the intensity of fire extinguishing agent sprays is insufficient, fire extinguishing agent can't reach the root of flame under the influence of high temperature turbulence, fire extinguishing effect is also not good, therefore the utility model can also be applied to fire control unmanned aerial vehicle.

The nitrogen is liquid at the temperature of minus 196 ℃, the liquid nitrogen volume is 1/640 of the gaseous nitrogen volume, the pressure in a low-temperature storage container is less than 0.1Mpa, the container does not need to be in the supervision category of a gas bottle, no periodic inspection is needed, and the gas extinguishing agent can be released to a protection area for playing a role in quick cooling because the liquid nitrogen temperature is minus 196 ℃, and the fire extinguishing design dosage of the gas extinguishing agent is less than that of a normal-temperature fire extinguishing system, so that the liquid nitrogen fire extinguishing system can save the investment of users, reduce the maintenance cost of the fire extinguishing system, and importantly, ensure that important places of the users are continuously protected.

The utility model combines the liquid nitrogen preservation technology to ensure that liquid nitrogen in a fire extinguishing system is daily consumed, and can realize efficient fire extinguishing and ultra-long-distance fire extinguishing, and simultaneously the utility model greatly reduces the problem of heavy volume of a common large-sized fire extinguisher, so that the utility model can be applied to a fire-fighting unmanned plane to effectively extinguish the fire in a long distance, and reduce the probability of damage of the unmanned plane caused by too close to a high-temperature fire source.

The utility model comprises the following steps:

the utility model aims to solve the existing problems, and provides a mixed fire extinguishing agent fire extinguishing system, which is used for extinguishing fire after liquid nitrogen fire extinguishing agent and dry powder fire extinguishing agent are mixed, and the dry powder fire extinguishing agent can be conveyed to a far end by secondarily pressurizing the dry powder after liquid nitrogen is gasified, so that the sprayed dry powder has sufficient kinetic energy to penetrate flame, directly abuts against the root of the flame, thereby improving the fire extinguishing efficiency and preventing re-combustion; meanwhile, after the incompletely vaporized liquid nitrogen mixed dry powder extinguishing agent is sprayed out, the incompletely vaporized liquid nitrogen mixed dry powder extinguishing agent is vaporized again, so that a large amount of heat can be absorbed, the temperature of a fire scene is reduced, and the fire extinguishing agent is beneficial to extinguishment.

In order to achieve the aim, the utility model provides a mixed fire extinguishing agent fire extinguishing system, which comprises a liquid nitrogen bottle group, a dry powder bottle group, a mixer, a spraying device and a control system, wherein the liquid nitrogen bottle group and the dry powder bottle group are respectively connected with the mixer, and one end of the mixer is connected with the spraying device; the liquid nitrogen bottle group is also connected with a pressurizing gas bottle group, and the pressurizing gas bottle group is connected with the injection device; the control system controls the liquid nitrogen bottle group, the dry powder bottle group and the pressurizing gas bottle group; the liquid nitrogen bottle group comprises a vacuum storage tank for storing liquid nitrogen fire extinguishing agent, the vacuum storage tank consists of a shell and a liner fixedly connected in the shell, a refrigerator for storing the liquid nitrogen fire extinguishing agent, a liquid nitrogen electromagnetic valve for spraying the liquid nitrogen fire extinguishing agent in the vacuum storage tank, and a reversing valve body group for pressurizing the interior of the vacuum storage tank are arranged on the shell, the refrigerator, the liquid nitrogen electromagnetic valve and the reversing valve body group are communicated with the liner, and a liquid nitrogen outlet is also arranged on the liquid nitrogen electromagnetic valve; the dry powder bottle group comprises a dry powder bottle and a dry powder bottle electromagnetic valve arranged on the dry powder bottle, and the dry powder bottle electromagnetic valve is provided with a dry powder outlet; the pressurizing gas bottle group comprises a pressurizing gas bottle and a pressurizing gas bottle electromagnetic valve arranged on the pressurizing gas bottle; the control system is electrically connected with the liquid nitrogen electromagnetic valve, the dry powder bottle electromagnetic valve and the pressurizing gas bottle electromagnetic valve respectively.

Further, in order to fully mix and reduce the forward spraying resistance of the mixed fire extinguishing agent, the mixer is provided with a liquid nitrogen pipe joint and a dry powder pipe joint which are communicated with the inside of the mixer, the mixer is a circular pipe with through holes at two ends, the liquid nitrogen pipe joint is connected with one end of the through hole, the dry powder pipe joint is obliquely connected into the circular pipe of the mixer from the outer body of the circular pipe of the mixer, the dry powder pipe joint and the central shaft of the mixer form a sharp angle, and the dry powder pipe joint is not less than one.

Further, in order to ensure the pressure value in the liquid nitrogen bottle group, the pressurizing gas bottle group is communicated with the liquid nitrogen bottle group through a reversing valve, the reversing valve body group comprises a reversing valve, a safety valve and a pressure gauge, the safety valve is connected to the reversing valve, the reversing valve comprises a reversing valve body, a first connector and a second connector, the first connector and the second connector are arranged on the reversing valve body, a cavity, a piston and a valve rod which can move in the cavity are arranged in the reversing valve body, and the first connector and the second connector are communicated with the cavity; the first connector is connected with a pressurizing gas bottle which stores pressurizing gas, the second connector is communicated with the vacuum storage tank, the pressurizing gas bottle discharges the pressurizing gas, the pressurizing gas enters the cavity through the first connector to push the piston to move in the cavity, and the pressurizing gas enters the inner container through the second connector.

Further, in order to improve the spraying distance of the mixed fire extinguishing agent, the spraying device comprises a fixed gun barrel and a telescopic gun barrel arranged in the fixed gun barrel, a fixed piston is arranged in the fixed gun barrel, a connector opening is arranged at the front end of the fixed gun barrel, an internal thread is arranged at the connector opening, the mixer is connected with the fixed gun barrel through the internal thread, and a tail end piston is arranged at the tail end of the fixed gun barrel; one end of the telescopic gun tube sequentially passes through the tail end piston, the fixed piston is arranged in the fixed gun tube, and the other end of the telescopic gun tube extends out of the fixed gun tube; the telescopic gun tube is arranged on the main body in the fixed gun tube, and a ring table is arranged on the ring table; a first sealing cavity is formed between the fixed piston and the annular table, and a first damping spring is arranged in the first sealing cavity; and a second sealing cavity is formed between the tail end piston and the annular table, and a second damping spring is arranged in the second sealing cavity.

Further, a telescopic gun barrel on the gun barrel is fixed, gas is input into the air inlet joint, so that the gun barrel is lengthened and recovered, and the fixed gun barrel is provided with a first air inlet joint communicated with the first sealing cavity and a second air inlet joint communicated with the second sealing cavity; o-shaped sealing rings are arranged on the inner annular walls of the fixed piston and the tail end piston, and the first air inlet connector and the second air inlet connector are connected with pneumatic reversing valves.

Furthermore, the expansion control of the injection device by the gas-filled gas bottle is realized, a gas-filled pipeline is arranged between the pneumatic reversing valve and the gas-filled gas bottle, a first gas-filled electromagnetic valve is arranged on the gas-filled pipeline, and the pneumatic reversing valve and the first gas-filled electromagnetic valve are electrically connected with a control system.

Further, continuous supplement of the pressure of the vacuum storage tank by the gas filling bottle is achieved, the gas filling bottle is communicated with the liquid nitrogen bottle group through a high-pressure air pipe, one end of the high-pressure air pipe is connected with a gas filling bottle electromagnetic valve, the other end of the high-pressure air pipe is connected with a reversing valve body group, a second gas filling electromagnetic valve is further arranged on the high-pressure air pipe, and the second gas filling electromagnetic valve and the reversing valve body group are electrically connected with a control system.

Further, the effective mixing of the liquid nitrogen fire extinguishing agent and the dry powder fire extinguishing agent is realized, the sharp angle formed by the dry powder pipe joint and the central shaft of the mixer is 30 degrees, the mixer is connected with the liquid nitrogen electromagnetic valve through a liquid nitrogen pipe, one end of the liquid nitrogen pipe is connected with the liquid nitrogen pipe joint arranged on the mixer, and the other end of the liquid nitrogen pipe is connected with a liquid nitrogen outlet; the mixer is connected with the electromagnetic valve of the dry powder bottle through a dry powder pipe, one end of the dry powder pipe is connected with a dry powder pipe joint arranged on the mixer, and the other end of the dry powder pipe is connected with a dry powder outlet.

The beneficial effects of the utility model are as follows: the utility model relates to a mixed fire extinguishing agent fire extinguishing system, which comprises a liquid nitrogen bottle group, a dry powder bottle group and a gas filling bottle group, wherein the volume of the liquid nitrogen fire extinguishing agent is expanded by approximately 700 times under the normal temperature and normal pressure environment after being released, the dry powder fire extinguishing agent can be secondarily pressurized, the dry powder fire extinguishing agent enters a mixer and is secondarily mixed with liquid nitrogen (nitrogen after vaporization of liquid nitrogen) (the primary mixing is that high-pressure nitrogen is filled in the dry powder bottle), the liquid nitrogen fire extinguishing agent is vaporized under the normal temperature and normal pressure and forms high-pressure nitrogen in a limited space to push the dry powder fire extinguishing agent to spray, meanwhile, the liquid nitrogen fire extinguishing agent which is not vaporized in time and the dry powder fire extinguishing agent are continuously mixed and sprayed out, the mixer is a circular tube with through holes at two ends, a liquid nitrogen tube joint is connected into one end through hole, the dry powder tube joint is obliquely connected into the circular tube body of the mixer, the dry powder tube joint and the central shaft of the mixer form a 30-degree angle structure, when the fire extinguishing agent enters the mixer along the tube axis, and then the fire extinguishing agent is cut into the mixer at 30-degree angle to form a forward liquid nitrogen potential, and the liquid nitrogen is enabled to push the dry fire extinguishing agent to be vaporized in time and then mixed with the dry powder before being vaporized in time; firstly, the effective spraying distance of the dry powder extinguishing agent which is conveyed to the farther end by the secondary pressurization after the vaporization of the liquid nitrogen can reach 60-70m, and the spraying effective distance of the conventional dry powder extinguishing device is only 6-15m; secondly, the sprayed dry powder has sufficient kinetic energy to penetrate the flame and directly support against the root of the flame, so that the fire extinguishing efficiency is improved, and the reburning is prevented; the liquid nitrogen storage technology is utilized to ensure that the liquid nitrogen extinguishing agent is not consumed in the daily storage process, and the volume of the device is greatly reduced compared with that of common large-scale fire extinguisher equipment, so that the device can be applied to a fire-fighting unmanned aerial vehicle.

Drawings

For ease of illustration, the utility model is described in detail by the following preferred embodiments and the accompanying drawings.

FIG. 1 is a schematic diagram of a fire extinguishing system of the present utility model with a mixed fire extinguishing agent;

FIG. 2 is a schematic view of the structure of the fire extinguishing system with mixed fire extinguishing agent according to the present utility model, when the telescopic gun barrel of the spraying device is not extended;

FIG. 3 is a schematic view of the structure of the fire extinguishing system with mixed fire extinguishing agent according to the present utility model when the telescopic gun barrel of the spraying device is extended;

FIG. 4 is a schematic view of a mixer in a mixed fire extinguishing agent fire extinguishing system of the present utility model;

FIG. 5 is a schematic diagram of the structure of a liquid nitrogen bottle set in the fire extinguishing system of the mixed fire extinguishing agent of the present utility model;

FIG. 6 is a schematic diagram of the structure of a reversing valve block set in a mixed fire extinguishing agent fire extinguishing system of the present utility model;

fig. 7 is a cross-sectional view of a mixer in a mixed fire suppression agent fire suppression system in accordance with the present utility model.

In the figure: a liquid nitrogen bottle group 1, a dry powder bottle group 2, a mixer 3, a spraying device 4, a control system 5, a gas-charging bottle group 6, a liquid nitrogen pipe joint 31, a dry powder pipe joint 32, a vacuum storage tank 11, a shell 12, a liner 13, a liquid nitrogen solenoid valve 14, a reversing valve body group 15, a refrigerator 16, a liquid nitrogen outlet 141, a dry powder bottle 21, a dry powder bottle solenoid valve 22, a dry powder outlet 23, a gas-charging bottle 61, a gas-charging bottle solenoid valve 62, a reversing valve 151, a safety valve 152, a pressure gauge 153, a reversing valve body 1511, a first joint 1512, a second joint 1513, a cavity 1514, a piston 1515, a valve rod 1516, a fixed gun barrel 41, a telescopic gun barrel 42, a fixed piston 411, a connector port 412, a terminal piston 413, a ring 421, a seal ring 422, a first seal chamber 43, a first damper spring 44, a second seal chamber 45, a second damper spring 46, an O-ring 49, a first air inlet joint 47, a second air inlet joint 48, a gas-charging line 71, a gas-charging valve 7, a gas-charging line 71, a first gas-charging solenoid valve 72, a high-pressure pipe 63, a second gas-charging pipe 142, and a dry powder pipe 142.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

The utility model relates to a mixed fire extinguishing agent fire extinguishing system, which is further described below with reference to the accompanying drawings:

the mixed fire extinguishing agent fire extinguishing system as shown in fig. 1-7 comprises a liquid nitrogen bottle group 1, a dry powder bottle group 2, a mixer 3, an injection device 4 and a control system 5, wherein the liquid nitrogen bottle group 1 is also connected with a pressurizing gas bottle group 6, the pressurizing gas bottle group 6 is connected with the injection device 4, the pressurizing gas bottle group 6 comprises a pressurizing gas bottle 61 and a pressurizing gas bottle electromagnetic valve 62 arranged on the pressurizing gas bottle 61, the pressurizing gas bottle is filled with pressurizing gas, high-pressure nitrogen is preferentially used for the pressurizing gas, and the pressurizing gas firstly provides a telescopic dynamic source for the injection device 4 and secondly pressurizes the liquid nitrogen bottle group;

the liquid nitrogen bottle group 1 shown in fig. 5 comprises a vacuum storage tank 11 for storing liquid nitrogen fire extinguishing agent, wherein the vacuum storage tank 11 consists of a shell 12 and a liner 13 fixedly connected in the shell 12, the liner and the shell are in a vacuum state, so that liquid nitrogen can be effectively stored in a thermal insulation manner, the daily natural evaporation loss is avoided, a refrigerator 16 for storing the liquid nitrogen, a liquid nitrogen electromagnetic valve 14 for spraying the liquid nitrogen fire extinguishing agent in the vacuum storage tank 11, and a reversing valve body group 15 for pressurizing the inside of the vacuum storage tank 11 are arranged on the shell 12, the refrigerator 16, the liquid nitrogen electromagnetic valve 14 and the reversing valve body group 15 are communicated with the liner 13, a liquid nitrogen outlet 141 is also arranged on the liquid nitrogen electromagnetic valve 14, so that the loss caused by the evaporation of the liquid nitrogen is reduced, the stable operation of the whole fire extinguishing system is ensured, the liquid nitrogen fire extinguishing agent can be stored in the vacuum storage tank constantly at a temperature of 200-196 ℃ below zero, the liquid nitrogen is liquefied into the liquid state, the liquid nitrogen fire extinguishing agent is continuously stored in the vacuum storage tank, the vacuum storage tank is not reduced, the fire extinguishing agent is not reduced, and the fire extinguishing agent is not discharged by the vacuum storage tank is not controlled, and the fire extinguishing system is not controlled;

the reversing valve body set 15 shown in fig. 6 comprises a reversing valve 151, a safety valve 152 and a pressure gauge 153, wherein the safety valve 152 and the pressure gauge 153 are connected to the reversing valve 151, the reversing valve 151 comprises a reversing valve body 1511, a first connector 1512 and a second connector 1513 which are arranged on the reversing valve body 1511, a cavity 1514, a piston 1515 and a valve rod 1516 which are connected and can move in the cavity 1514 are arranged in the reversing valve body 1511, and the first connector 1512 and the second connector 1513 are communicated with the cavity 1514; the first connector 1512 is connected with a pressurized gas bottle 61 storing pressurized gas, the second connector 1513 is communicated with the vacuum storage tank 11, the pressurized gas bottle 61 discharges the pressurized gas, the pressurized gas enters the cavity 1514 through the first connector 1512 to push the piston 1515 to move in the cavity 1514, and the pressurized gas enters the inner container 13 through the second connector 1513; the gas filling cylinder group 6 is communicated with the liquid nitrogen cylinder group 1 through a high-pressure air pipe 63, one end of the high-pressure air pipe 63 is connected with a gas filling cylinder electromagnetic valve 62, the other end of the high-pressure air pipe 63 is connected with a reversing valve body group 15, a second gas filling cylinder electromagnetic valve 64 is further arranged on the high-pressure air pipe 63, the second gas filling cylinder electromagnetic valve 62 and the reversing valve body group 15 are electrically connected with the control system 5, the vacuum storage tank is continuously pressurized through the gas filling cylinder to ensure the continuous release of liquid nitrogen fire extinguishing, the gas filling cylinder group 6 is communicated with the liquid nitrogen cylinder group 1 through the reversing valve body group 15, the gas filling cylinder group 6 effectively pressurizes the liquid nitrogen when the liquid nitrogen cannot be continuously released due to the pressure reduction of the liquid nitrogen fire extinguishing agent after the release of the liquid nitrogen extinguishing agent, the continuous release of the liquid nitrogen extinguishing agent is ensured, the high-pressure nitrogen in the gas filling cylinder 61 is depressurized through a reversing valve 151, and the depressurized nitrogen enters the vacuum storage tank 11 to prevent the explosion caused by the direct entry of the high-pressure nitrogen into the vacuum storage tank 11;

in this embodiment, the dry powder bottle group 2 includes a dry powder bottle 21 and a dry powder bottle electromagnetic valve 22 disposed on the dry powder bottle 21, the dry powder bottle electromagnetic valve 22 is provided with a dry powder outlet 23, the dry powder bottle is filled with a dry powder extinguishing agent and high-pressure nitrogen, and the high-pressure nitrogen can provide the pressure required by spraying when releasing the dry powder extinguishing agent;

in this embodiment, the mixer 3 is provided with one liquid nitrogen pipe joint 31 and two dry powder pipe joints 32 which are communicated with the interior of the mixer 3, the mixer 3 is a circular pipe with through holes at two ends, the liquid nitrogen pipe joint 31 is connected with a through hole at one end, the dry powder pipe joint 32 is obliquely connected into the circular pipe of the mixer 3 from the outer body of the circular pipe of the mixer, the dry powder pipe joint 32 forms a sharp angle of 30 degrees with the central axis of the mixer 3, the continuity of injection of dry powder extinguishing agent entering the mixer is ensured, the liquid nitrogen bottle group 1 and the dry powder bottle group 2 are respectively connected with the mixer 3, the mixer 3 is connected with the liquid nitrogen electromagnetic valve 14 through a liquid nitrogen pipe 142, one end of the liquid nitrogen pipe 142 is connected with the liquid nitrogen pipe joint 31 arranged on the mixer 3, and the other end of the liquid nitrogen pipe 142 is connected with a liquid nitrogen outlet 141; the mixer 3 is connected with the dry powder bottle electromagnetic valve 22 through a dry powder pipe 221, one end of the dry powder pipe 221 is connected with a dry powder pipe joint 32 arranged on the mixer 3, and the other end of the dry powder pipe 221 is connected with a dry powder outlet 23, so that the liquid nitrogen fire extinguishing agent and the dry powder fire extinguishing agent are effectively mixed. The dry powder extinguishing agent enters a mixer to be secondarily mixed with the liquid nitrogen extinguishing agent, and meanwhile, after the liquid nitrogen is gasified, the liquid nitrogen is rapidly expanded in a limited space to form high-pressure nitrogen to push the dry powder extinguishing agent to be secondarily pressurized to ensure that the sprayed dry powder extinguishing agent has sufficient kinetic energy to penetrate flame and directly support against the root of the flame, so that the extinguishing efficiency is improved, the re-combustion is prevented, the spraying distance of the dry powder extinguishing agent can reach 60 meters under the secondary pressurization of the liquid nitrogen, the maximum can reach 70 meters, the liquid nitrogen extinguishing agent which is not timely gasified and the dry powder extinguishing agent are sprayed after being mixed, the liquid nitrogen extinguishing agent is gasified again to absorb a large amount of heat, the temperature of a fire scene is reduced, and the extinguishing efficiency is increased; one end of the mixer 3 is connected with a spraying device 4 which adopts a telescopic structure, so that the spraying distance of the fire extinguishing agent is increased;

the injection device 4 as shown in fig. 2 and 3 comprises a fixed gun barrel 41 and a telescopic gun barrel 42 arranged in the fixed gun barrel 41, wherein a fixed piston 411 is arranged in the fixed gun barrel 41, the front end of the fixed gun barrel 41 is provided with a connector port 412, the connector port 412 is provided with internal threads, the mixer 3 is connected with the fixed gun barrel 41 through the internal threads, and the tail end of the fixed gun barrel 41 is provided with a tail end piston 413; one end of the telescopic gun tube 42 sequentially passes through the tail end piston 413 and the fixed piston 411 to be arranged in the fixed gun tube 41, and the other end of the telescopic gun tube extends out of the fixed gun tube 41; the telescopic gun barrel 42 is arranged on the main body in the fixed gun barrel 41, and a ring table 421 is arranged on the ring table 421; a first sealing cavity 43 is formed between the fixed piston 411 and the annular table 421, and a first damping spring 44 is arranged in the first sealing cavity 43; a second sealing cavity 45 is formed between the end piston 413 and the annular table 421, and a second damping spring 46 is arranged in the second sealing cavity 45; the extension and recovery of the telescopic gun tube in the fixed gun tube are realized by inputting pressurized gas into the air inlet joint on the fixed gun tube, the fixed gun tube 41 is provided with a first air inlet joint 47 communicated with the first sealing cavity 43 and a second air inlet joint 48 communicated with the second sealing cavity 45; o-shaped sealing rings 49 are arranged on the inner annular walls of the fixed piston 411 and the tail end piston 413, and the first air inlet connector 47 and the second air inlet connector 48 are connected with a pneumatic reversing valve 7; the pneumatic reversing valve 7 is communicated with the gas charging bottle 61 through a charging pipeline 71, a first gas charging electromagnetic valve 72 is arranged on the charging pipeline 71, the gas charging is controlled to enter the pneumatic reversing valve through the first gas charging electromagnetic valve 72 to drive the telescopic gun barrel to move, the pneumatic reversing valve 7 and the first gas charging electromagnetic valve 61 are electrically connected with the control system 5, the control of the expansion and contraction of the injection device by the gas charging bottle is realized, the gas charging bottle is communicated with the pneumatic reversing valve, high-pressure nitrogen in the gas charging bottle reaches the pneumatic reversing valve through the charging pipeline 71, the control system controls the pneumatic reversing valve, and the first air inlet connector and the second air inlet connector are respectively communicated with the pneumatic reversing valve; when the pneumatic reversing valve is communicated with the first air inlet joint, high-pressure nitrogen enters the first sealing cavity 43 to enable the telescopic gun tube to extend out of the fixed gun tube and then output mixed fire extinguishing agent for combined fire extinguishing, the telescopic gun tube improves the fire extinguishing agent range, and when the pneumatic reversing valve 7 is communicated with the second air inlet joint 48, pressurized air enters the second sealing cavity 45 through the second air inlet joint 48 to enable the telescopic gun tube 42 to be recovered backwards;

in this embodiment, the control system 5 controls the liquid nitrogen bottle group 1, the dry powder bottle group 2 and the gas-filled bottle group 6 to be electrically connected with the liquid nitrogen solenoid valve 14, the dry powder bottle solenoid valve 22 and the gas-filled bottle solenoid valve 62 respectively, and the control system controls the operation of the whole fire extinguishing system.

The utility model also relates to a using method of the mixed fire extinguishing agent fire extinguishing system, which comprises the following specific steps:

(1) in standby state, the control system 5 monitors the state of the liquid nitrogen bottle group 1 in real time, a refrigerator 16 is arranged on a vacuum storage tank 11 for storing liquid nitrogen fire extinguishing agent, when the pressure in the vacuum storage tank 11 reaches a certain threshold value, the refrigerator 16 is started to liquefy vaporized nitrogen into liquid nitrogen again, and when the pressure in the vacuum storage tank 11 is larger than the set threshold value of a safety valve 152 in the reversing valve body group 15, the vacuum storage tank 11 is decompressed through the safety valve 152.

(2) When a fire disaster occurs, the vacuum storage tank 11 releases liquid nitrogen fire extinguishing agent to enter the mixer 3 through the liquid nitrogen pipe 142, the dry powder bottle 21 releases high-pressure dry powder fire extinguishing agent to enter the mixer 3 through the dry powder pipe 221, the dry powder fire extinguishing agent and the liquid nitrogen fire extinguishing agent are mixed in the mixer 3 to form mixed fire extinguishing agent, and the mixer 3 conveys the mixed fire extinguishing agent to the spraying device 4 at one end for spraying and extinguishing; before the mixed fire extinguishing agent is sprayed, the pressurized gas in the pressurized gas bottle 61 quickly enters the pneumatic reversing valve 7 through the pressurized pipeline 71, the control system 5 controls the pneumatic reversing valve 7 to be communicated with the first air inlet joint 47, the pressurized gas enters the first sealing cavity 43 through the first air inlet joint 47 to push the telescopic gun tube 42 to extend forwards, the range is improved, and the mixed fire extinguishing agent in the mixer 3 is sprayed out through the fixed gun tube 41-the telescopic gun tube 42 to extinguish the fire; when the liquid nitrogen fire extinguishing agent is sprayed, the pressure of the vacuum storage tank 11 is detected to be smaller than the set value in the reversing valve body group 15, the pressurizing gas bottle 61 discharges pressurizing gas depressurized by the reversing valve body group 15 into the vacuum storage tank 11, and the pressurizing gas is supplemented into the vacuum storage tank 11, so that the liquid nitrogen fire extinguishing agent in the vacuum storage tank 11 is continuously released.

(3) After the fire is extinguished, the control system 5 controls the pneumatic reversing valve 7 to be communicated with the second air inlet joint 48, and the pressurized air enters the second sealing cavity 45 through the second air inlet joint 48 to enable the telescopic gun tube 42 to be recovered backwards; the control system 5 closes the dry powder bottle group 2, the liquid nitrogen bottle group 1 and the pressurizing gas bottle group 6 in sequence.

The fire extinguishing process of the mixed fire extinguishing agent fire extinguishing system comprises the following steps: after receiving the spraying action signal, the control box starts a dry powder bottle electromagnetic valve, a second pressurizing gas electromagnetic valve, a liquid nitrogen electromagnetic valve and a dry powder bottle electromagnetic valve; pressurizing the liquid nitrogen bottle group by the gas filling bottle group to enable the liquid nitrogen extinguishing agent to enter the mixer, enabling the dry powder extinguishing agent sprayed by the dry powder bottle group to enter the mixer to be mixed with the liquid nitrogen extinguishing agent to form a mixed extinguishing agent, enabling an outlet of the mixer to be communicated with the spraying device, and outputting the liquid nitrogen-dry powder extinguishing agent for combined use to extinguish a fire; before the fire extinguishing agent is sprayed, the control box starts a dry powder bottle electromagnetic valve and a first pressurizing gas electromagnetic valve, and pressurizing gas enters the first sealing cavity through the first air inlet connector to push the telescopic gun tube to extend forwards, so that the range is improved; an O-shaped sealing ring is arranged in the injection device and used for sealing to prevent pressure leakage, pressurized gas enters the first sealing cavity through the first air inlet connector to push the telescopic gun barrel to extend forwards, the range is improved, a second damping spring is arranged on the telescopic gun barrel in the first sealing cavity and used for reducing impact of the telescopic gun barrel on the tail end piston, the tail end piston can limit the stroke of the telescopic gun barrel, the gun barrel is prevented from being damaged, and the fire extinguishing agent injection is influenced; after fire extinguishing, the compressed gas pushes the telescopic gun tube to be recovered backward through the pneumatic reversing valve and the second air inlet connector, the first damping spring is used for reducing the impact of the telescopic gun tube on the fixed piston, and the fixed piston can limit the stroke of the telescopic gun tube and prevent the gun tube from being damaged.

The utility model relates to a mixed fire extinguishing agent fire extinguishing system, which consists of a liquid nitrogen bottle group, a dry powder bottle group, a gas filling bottle group, a spraying device and the like, wherein the volume of the liquid nitrogen fire extinguishing agent is expanded by approximately 700 times in a normal temperature and normal pressure environment after being released, the dry powder fire extinguishing agent can be pressurized for the second time, the dry powder fire extinguishing agent enters into a mixer and then is mixed with liquid nitrogen (high-pressure nitrogen after vaporization of liquid nitrogen) (the primary mixing is that the high-pressure nitrogen is filled in the dry powder bottle), the liquid nitrogen fire extinguishing agent is vaporized in a limited space by utilizing the liquid nitrogen and then forms high-pressure nitrogen to push the spray of the dry powder fire extinguishing agent, meanwhile, the liquid nitrogen fire extinguishing agent which is not vaporized in time and the dry powder fire extinguishing agent are continuously mixed and sprayed out, a liquid nitrogen pipe joint is connected with one end through hole, the dry powder pipe joint is connected into the dry powder pipe body of the mixer in an inclined way, the dry powder pipe joint and the central shaft of the mixer form a 30-degree angle structure, when the liquid nitrogen fire extinguishing agent enters into the mixer along the pipe shaft of the mixer, and then the liquid nitrogen is vaporized in a 30-degree angle into the mixer, so that the liquid nitrogen is pushed forward and the dry powder is sprayed out in time at the same time; firstly, the effective spraying distance of the dry powder extinguishing agent which is conveyed to the farther end by the secondary pressurization after the vaporization of the liquid nitrogen can reach 60-70m, and the spraying effective distance of the conventional dry powder extinguishing device is only 6-15m; secondly, the sprayed dry powder has sufficient kinetic energy to penetrate the flame and directly support against the root of the flame, so that the fire extinguishing efficiency is improved, and the reburning is prevented; the vaporization of the sprayed liquid nitrogen can absorb a large amount of heat, reduce the temperature of a fire scene, and is beneficial to fire extinguishment.

In the embodiment, the capacity of the vacuum storage tank is 70L, the weight of the liquid nitrogen medium is 50KG, the internal pressure is less than 0.1Mpa, and the effective spraying distance is more than 5m; the pressurizing gas cylinder adopts a high-pressure nitrogen cylinder with the capacity of 15L and the internal pressure of the pressurizing gas cylinder is 12Mpa; the capacity of the dry powder bottle is 63L, the weight of the dry powder medium is 50KG, the internal pressure is 1.2Mpa, and the effective spraying distance is 6-8 m;

mixing the liquid nitrogen fire extinguishing agent in the vacuum storage tank with the dry powder fire extinguishing agent in the dry powder bottle in a mixer, vaporizing liquid nitrogen in the mixer, and carrying out secondary pressurization on the dry powder fire extinguishing agent in a limited space, wherein the pressure in the mixer can reach 2.3Mpa, and the pressure of a mixer used by a conventional fire extinguishing device in the prior art is not higher than 1Mpa; the instantaneous pressure of the mixed fire extinguishing agent medium mixed by the liquid nitrogen fire extinguishing agent and the dry powder fire extinguishing agent in the mixer is 2.2Mpa, the initial speed is more than 70M/s, the effective range is not less than 60M, compared with the conventional dry powder fire extinguishing device in the prior art, the instantaneous pressure of the mixed fire extinguishing agent medium sprayed by the mixed fire extinguishing agent medium is only 1.2Mpa, the initial speed is 25M/s, the effective range is not more than 15M, meanwhile, the technology or the product for carrying out secondary pressurization by using liquid nitrogen as the dry powder fire extinguishing agent is not available in the present fire-fighting industry, the data show that the utility model mixes the liquid nitrogen and the dry powder and increases the dry powder twice, the spray force is more powerful, the spray distance is more distant, and the liquid nitrogen fire extinguishing agent which is not vaporized in time can absorb a large amount of heat after being sprayed by the dry powder fire extinguishing agent, thereby reducing the temperature of fire scene and being beneficial to extinguish.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (8)

1. A mixed fire extinguishing agent fire extinguishing system, characterized by: the device comprises a liquid nitrogen bottle group, a dry powder bottle group, a mixer, a spraying device and a control system, wherein the liquid nitrogen bottle group and the dry powder bottle group are respectively connected with the mixer, and one end of the mixer is connected with the spraying device; the liquid nitrogen bottle group is also connected with a pressurizing gas bottle group, and the pressurizing gas bottle group is connected with the injection device; the control system controls the liquid nitrogen bottle group, the dry powder bottle group and the pressurizing gas bottle group; the liquid nitrogen bottle group comprises a vacuum storage tank for storing liquid nitrogen fire extinguishing agent, the vacuum storage tank consists of a shell and a liner fixedly connected in the shell, a refrigerator for storing the liquid nitrogen fire extinguishing agent, a liquid nitrogen electromagnetic valve for spraying the liquid nitrogen fire extinguishing agent in the vacuum storage tank, and a reversing valve body group for pressurizing the interior of the vacuum storage tank are arranged on the shell, the refrigerator, the liquid nitrogen electromagnetic valve and the reversing valve body group are communicated with the liner, and a liquid nitrogen outlet is also arranged on the liquid nitrogen electromagnetic valve; the dry powder bottle group comprises a dry powder bottle and a dry powder bottle electromagnetic valve arranged on the dry powder bottle, and the dry powder bottle electromagnetic valve is provided with a dry powder outlet; the pressurizing gas bottle group comprises a pressurizing gas bottle and a pressurizing gas bottle electromagnetic valve arranged on the pressurizing gas bottle; the control system is electrically connected with the liquid nitrogen electromagnetic valve, the dry powder bottle electromagnetic valve and the pressurizing gas bottle electromagnetic valve respectively.

2. The fire extinguishing system of claim 1, wherein the mixer is provided with a liquid nitrogen pipe joint and a dry powder pipe joint which are communicated with the interior of the mixer, the mixer is a circular pipe with through holes at two ends, the liquid nitrogen pipe joint is connected with the through holes at one end, the dry powder pipe joint is obliquely connected into the circular pipe of the mixer from the outer body of the circular pipe of the mixer, the dry powder pipe joint forms a sharp angle with the central shaft of the mixer, and the dry powder pipe joint is not less than one.

3. The fire extinguishing system of mixed fire extinguishing agent according to claim 1, wherein the reversing valve body group comprises a reversing valve, a safety valve and a pressure gauge, wherein the safety valve and the pressure gauge are connected to the reversing valve, the reversing valve comprises a reversing valve body, a first connector and a second connector which are arranged on the reversing valve body, a cavity and a piston and a valve rod which are connected and can move in the cavity are arranged in the reversing valve body, and the first connector and the second connector are communicated with the cavity; the first connector is connected with a pressurizing gas bottle which stores pressurizing gas, the second connector is communicated with the vacuum storage tank, the pressurizing gas bottle discharges the pressurizing gas, the pressurizing gas enters the cavity through the first connector to push the piston to move in the cavity, and the pressurizing gas enters the inner container through the second connector.

4. The fire extinguishing system of mixed fire extinguishing agent according to claim 1, wherein the spraying device comprises a fixed gun barrel and a telescopic gun barrel arranged in the fixed gun barrel, a fixed piston is arranged in the fixed gun barrel, a connector port is arranged at the front end of the fixed gun barrel, an internal thread is arranged at the connector port, the mixer is connected with the fixed gun barrel through the internal thread, and a tail end piston is arranged at the tail end of the fixed gun barrel; one end of the telescopic gun tube sequentially passes through the tail end piston, the fixed piston is arranged in the fixed gun tube, and the other end of the telescopic gun tube extends out of the fixed gun tube; the telescopic gun tube is arranged on the main body in the fixed gun tube, and a ring table is arranged on the ring table; a first sealing cavity is formed between the fixed piston and the annular table, and a first damping spring is arranged in the first sealing cavity; and a second sealing cavity is formed between the tail end piston and the annular table, and a second damping spring is arranged in the second sealing cavity.

5. The fire extinguishing system of claim 4, wherein the fixed barrel is provided with a first air inlet connector communicated with the first sealed cavity and a second air inlet connector communicated with the second sealed cavity; o-shaped sealing rings are arranged on the inner annular walls of the fixed piston and the tail end piston, and the first air inlet connector and the second air inlet connector are connected with pneumatic reversing valves.

6. The fire extinguishing system of claim 5, wherein a pressurizing pipeline is arranged between the pneumatic reversing valve and the pressurizing gas cylinder, a first pressurizing gas electromagnetic valve is arranged on the pressurizing pipeline, and the pneumatic reversing valve and the first pressurizing gas electromagnetic valve are electrically connected with the control system.

7. The fire extinguishing system of mixed fire extinguishing agent according to claim 1, wherein the pressurized gas bottle group is communicated with the liquid nitrogen bottle group through a high-pressure gas pipe, one end of the high-pressure gas pipe is connected with a pressurized gas bottle electromagnetic valve, the other end of the high-pressure gas pipe is connected with a reversing valve body group, a second pressurized gas electromagnetic valve is further arranged on the high-pressure gas pipe, and the second pressurized gas electromagnetic valve and the reversing valve body group are electrically connected with the control system.

8. The fire extinguishing system of mixed fire extinguishing agent according to claim 2, wherein the dry powder pipe joint forms a sharp angle of 30 degrees with a central shaft of the mixer, the mixer is connected with the liquid nitrogen electromagnetic valve through a liquid nitrogen pipe, one end of the liquid nitrogen pipe is connected with a liquid nitrogen pipe joint arranged on the mixer, and the other end is connected with a liquid nitrogen outlet; the mixer is connected with the electromagnetic valve of the dry powder bottle through a dry powder pipe, one end of the dry powder pipe is connected with a dry powder pipe joint arranged on the mixer, and the other end of the dry powder pipe is connected with a dry powder outlet.

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