CN115990325A - Fire extinguishing device that liquid nitrogen refrigeration was sprayed for coal marine fire disaster - Google Patents

Abstract

The invention discloses a liquid nitrogen refrigerating and spraying fire extinguishing device for coal marine fire, which comprises a spraying part, a liquid nitrogen refrigerating part and a water pumping part, wherein the spraying device is adsorbed on the top of a cargo hold of the spraying device, and the liquid nitrogen sprayed to a refrigerating area can be rapidly gasified and diffused by reasonably arranging an electric control nozzle and a mounting structure of a diffusion motor, so that the cooling speed of the refrigerating area is accelerated; heat exchange is carried out by using the heat exchanger so that liquid in a liquid pipe passing through the heat exchanger is cooled while flowing; the accurate control of the cooling temperature can be realized by controlling the spraying amount of the electric control nozzle and the rotating speed of the diffusion fan, thereby meeting the requirement of liquid cooling, and the pumping device is arranged at the lowest draft position, thereby achieving the special requirement on fire extinguishment.

Description

Fire extinguishing device that liquid nitrogen refrigeration was sprayed for coal marine fire disaster

Technical Field

The invention relates to the technical field of fire extinguishing devices, in particular to a fire extinguishing device for a marine cargo hold.

Background

Along with the exploitation of coal resources, international import and export trade is more and more frequent, marine transportation of coal resources in China is more and more important, and spontaneous combustion is caused by easily adsorbing gas in air by coal, or is extremely easy to cause due to factors such as overhigh temperature of a turbine, rising temperature of natural weather and the like, so that the temperature and the selection of fire extinguishing devices are paid attention to during transportation of bulk carriers, the market space is huge, and the method has important significance.

The existing bulk cargo ship has the advantages that the cargo hold is closed, the cargo hold is basically not opened in the transportation process, and the like, so that the cargo hold cannot be effectively cooled, if spontaneous combustion and fire occur in the cargo hold, the temperature of the cargo hold is reduced, secondary spontaneous combustion is prevented, and the fire extinguishing device of the cargo hold cannot achieve a good cooling effect at the present stage, so that the liquid nitrogen refrigerating system is added, and the problem is effectively solved.

Because in the ocean transportation process of the present stage, because the communication is blocked, the equipment is limited, and the ship performance is considered, the water injection quantity of the cargo hold needs to be manually modified in the fire extinguishing process, if the quantity is too small to achieve the fire extinguishing effect, the mechanical parameters of the ship can be influenced if the quantity is too large, so that the ship draft is influenced, the safe sailing of the ship is influenced, and the requirement of flexibility is met for the fire extinguishing device.

When coal is in spontaneous combustion, gas in the air is adsorbed, the adsorption performance of the coal is higher and higher along with the temperature rise of the coal, and the coal is more beneficial to spontaneous combustion, so that the coal is required to be cooled in the fire extinguishing process, the adsorption quantity of the coal is reduced, and the transportation safety of the coal is ensured on the other hand.

Disclosure of Invention

The invention aims to solve the problems that fire extinguishment is not flexible when a ship fires in a cargo hold in the process of transporting coal, and the temperature reduction is not obvious in the fire extinguishment process at present, and provides a set of reliable fire extinguishing device.

In order to achieve the purpose, the invention provides the following scheme:

a liquid nitrogen refrigerating and spraying fire extinguishing device for coal marine fire disaster has the technical scheme that: the refrigerating device comprises a temperature sensor and a controller which are connected with the liquid pipe, and the temperature sensor, the liquid nitrogen spraying device and the diffusion device are electrically connected with the controller; the spraying device is arranged at the top of the cargo hold, a plurality of water outlets and water inlets are arranged, a plurality of runner pipes are arranged, and magnets are arranged at the fixed connection positions of the top of the cargo hold; the water pumping devices are fixedly connected, the effect is prevented from being influenced by overlarge pressure, the water pumping devices are connected to a control system of the cockpit, and the connecting pipelines are all connected through fire-fighting pipelines.

Further, a fin group is arranged in a refrigerating area of the refrigerating device, the fins are all multiple fins, each fin is vertically and parallelly arranged, and diffusion channels are arranged between the fins.

Further, the diffusion device comprises a diffusion motor fixed at the top of the sealing cover, the motor shaft penetrates through the sealing cover and is provided with fan blades, and when the sealing cover seals the box body, the fan blades are positioned at the top of the refrigerating area.

Further, a nitrogen escape opening is formed in the portion, corresponding to the sealing cover, of the top of the nitrogen escape area.

Further, a water drainage groove is arranged on the bottom of the liquid nitrogen refrigeration box body, the water drainage groove penetrates through the refrigeration area and the nitrogen dissipation area, and one end of the water drainage groove is opened on the wall of the box body.

Further, a sensor mounting branch pipe is arranged on the liquid pipe in the fin group, and a probe of the sensor is inserted into the sensor mounting branch pipe and plugs an opening of the sensor mounting branch pipe; the sensor is electrically connected with the controller.

Furthermore, the spraying device is provided with a fire-fighting pipe-applying belt at the water inlet and the water outlet and a plurality of flow pipes.

Furthermore, a magnet is arranged at the spraying device of the water outlet device, so that the water outlet is adsorbed at the top of the cargo hold.

Further, the water pumping device adopts a high-power water pump, a first convex ring and a second convex ring which are arranged left and right are formed on the outer wall of the water pump body, and the water absorbing part is positioned between the first convex ring and the second convex ring.

Advantages of the device of the invention over the prior art:

1. according to the invention, the spraying device is adsorbed on the top of the cargo hold by the attractive force of the magnet on the pressing plate of the iron material, and the liquid nitrogen sprayed to the refrigeration zone can be rapidly gasified and diffused by reasonably arranging the installation structure of the electric control nozzle and the diffusion motor, so that the cooling speed of the refrigeration zone is increased; heat exchange is carried out by using the heat exchanger so that liquid in a liquid pipe passing through the heat exchanger is cooled while flowing; the device is mainly applicable to marine transportation of coal, and the unique property and the specificity of the coal determine the applicable requirements of the device.

2. According to the invention, the liquid nitrogen refrigerating device is added, so that the sprayed water is kept in a relatively low-temperature state, the effect of inhibiting spontaneous combustion of coal is achieved, secondary combustion is prevented, the fire extinguishing speed can be increased, the loss and harm are reduced to the minimum, and the ship can run safely.

Drawings

Fig. 1 is a schematic view of the structure of the device of the present invention.

In the figure: 1. a magnet; 2. extruding the push rod; 3. a push plate; 4. a spray header; 5. a telescopic air pipe; 6. a fire fighting pipeline; 7. a diffusion motor; 8. a controller; 9. a liquid nitrogen inlet; 10. a through region; 11. sealing cover; 12. a movable lock; 13. a fire fighting pipeline; 14. a water outlet part; 15. a water pump body; 16. a water absorbing part; 17. a filter screen; 18. and a second convex ring.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

As shown in figure 1, the fire extinguishing device for liquid nitrogen refrigeration spraying for coal marine fire disaster mainly comprises three parts, namely a spraying device, a liquid nitrogen refrigeration device and a water pumping device, which cooperate and respectively correspond to the functions of the three parts.

As shown in fig. 1, the spraying device comprises an outer frame 3, a supporting frame 2, and a clamping groove is formed in the outer frame, so that a magnet 1 can be placed at the top of a cargo hold of the spraying device and connected with the outer frame, and the position of the bracket is fixed, the spraying device can be stably fixed in the cargo hold of the spraying device, is connected with the magnet, can be conveniently detached when other cargoes are transported, and is lifted, and further comprises a cavity 5 for conveniently providing enough water pressure, so that the water yield reaches the maximum in unit time, and refrigerated water smoothly reaches a spraying head 4, and the spraying head 4 is connected with the cavity.

As shown in fig. 1, the liquid nitrogen refrigerating device comprises a diffusion motor 7, and liquid nitrogen sprayed by the electric control nozzle is diffused downwards along diffusion channels among fins and gasified to take away heat under the action of the diffusion motor. After the temperature sensor is arranged on the liquid pipe in the fin group, the temperature of liquid is detected through the temperature sensor, the temperature sensor is electrically connected with the controller 8, the spray quantity of each electric control nozzle, the rotating speed of the diffusion motor 7 and the flow speed of the liquid in the liquid pipe are controlled through the controller 8, the accurate control of the cooling temperature of the liquid can be realized, the liquid is ensured to flow out continuously while being rapidly cooled, the liquid nitrogen cooling device further comprises a liquid nitrogen diffusion area 11, the liquid nitrogen is distributed in the diffusion area of the liquid nitrogen diffusion area, a liquid nitrogen input port 9 is used for supplementing the liquid nitrogen, the middle part of the liquid nitrogen is communicated by adopting a movable lock 12, most of water flow can be distributed in the circulation area of the liquid nitrogen, the middle part 10 is a through area, and the liquid nitrogen can be conveniently and completely distributed around the water flow of the liquid nitrogen.

As shown in FIG. 1, the pumping device comprises a pump body 15, a water absorbing part 16 is arranged in the middle of the pump body 15, a water outlet part 14 is arranged at one end of the pump body 15, a water pump is arranged at the lowest waterline of the pump body, and the pumping device further comprises a 17 filter screen which is communicated through a main body 18 of the pump body, so that pumping is convenient.

As shown in fig. 1, the whole device is connected by special fire- fighting belts 6 and 13 for fire extinguishment, and the pipe belts are fixed on the deck of the ship for periodic inspection so as to ensure the integrity of the device.

The specific working principle of the invention is as follows:

in the initial state, the liquid nitrogen device and the water pumping device are in a non-electrified state, the spraying device is placed at a designated position and is easy to install, and when the ship cargo hold is filled with coal, the three systems are connected well and placed at the designated position; when fire disaster occurs in the cargo hold filled with coal, a shipboard worker energizes the liquid nitrogen refrigerating device and the water pumping device, water of the shipboard worker is filtered by the filter screen 17, reaches the water outlet 17 of the shipboard worker and enters the water inlet 12 of the liquid nitrogen refrigerating device, the temperature is controlled by the controller 8 to reach the ideal temperature, the shipboard worker enters the pipeline 6 through the water outlet of the shipboard worker and enters the spraying device, and the spraying device performs low-temperature water fire extinguishing under the pressure effect of the shipboard worker; after the fire is controlled, the ship staff should detect the stability of the ship and the water shut-down fire extinguishing device, the spraying device does not need to be disassembled, the liquid nitrogen refrigerating and water pumping part should be powered off in time, if the ship is stable at this moment, the system can not be guaranteed to be operated reversely, and the cargo water is pumped out of the part, so that the ship is stable, and the fire extinguishing effect is achieved.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (5)

1. A liquid nitrogen refrigerating and spraying fire extinguishing device for coal marine fire disaster is a novel refrigerating and spraying device arranged at the top of a cargo hold of a bulk cargo ship and comprises a liquid nitrogen refrigerating device and a high-pressure water pump. The fire extinguishing agent is characterized in that spray water for extinguishing fire is kept at a low temperature continuously, so that the adsorption of coal to water is reduced; a spraying system is arranged at the top of the cargo hold and is connected with a liquid nitrogen refrigerating device; a liquid nitrogen refrigerating device is arranged outside the cargo hold and is connected with a water pumping system; a water pumping system is arranged outside the cargo hold.

2. The fire extinguishing device for liquid nitrogen refrigeration spraying for coal marine fire according to claim 1, wherein a temperature sensor, a controller, a nitrogen storage area, a water inlet and a water outlet are arranged in the liquid nitrogen refrigeration system, and the fire extinguishing device is electrically connected with the controller by adopting a mode of the temperature controller.

3. The fire extinguishing device for liquid nitrogen refrigeration spraying for coal marine fire according to claim 1, wherein the spraying device is arranged at the top of the cargo hold, can effectively prevent and extinguish fire in time, and is controlled by the central sensor for analysis and evaluation.

4. The fire extinguishing device for liquid nitrogen refrigeration spraying for coal marine fire according to claim 1, wherein the water pumping system connected with the liquid nitrogen refrigeration device is convenient and quick, is positioned near the lowest waterline of a cargo ship, and can quickly react to the fire; the power system with the same power as the ship turbine is utilized, so that the water pumping is faster, the pressure is higher, and the reaction is timely and effectively performed.

5. The fire extinguishing device for liquid nitrogen refrigeration spraying for coal marine fire according to claim 1, wherein when the central controller finds abnormal conditions, the fire extinguisher starter can be started in time, and fire extinguishing treatment is performed at the initial stage of fire occurrence, so that guarantee is provided for safe operation of ships.

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