Fire extinguishing system for ship lithium battery room

Abstract

The utility model discloses a fire extinguishing system for a ship lithium battery room, which comprises a whole-ship CO2 fire extinguishing system and a cabin low-pressure water-based local fire extinguishing system, the whole-ship CO2 fire extinguishing system is communicated with the ship lithium battery room through at least one CO2 fire extinguishing branch pipe, the outlet end of the CO2 fire extinguishing branch pipe is positioned in the ship lithium battery room, and the cabin low-pressure water-based local fire extinguishing system is communicated with the cabin low-pressure water-based local fire extinguishing system. A selector valve is arranged on each CO2 fire extinguishing branch pipe outside a ship lithium battery room, and the selector valves are connected with the whole ship CO2 fire extinguishing system through cables; the engine room low-pressure water-based local fire extinguishing system is communicated with a ship lithium battery through at least one low-pressure water fire extinguishing branch pipe, an isolating valve is arranged on each low-pressure water fire extinguishing branch pipe located in the pump station, and the isolating valves are connected with the starting control box through cables. According to the fire extinguishing system for the ship lithium battery room, only one fire extinguishing branch is separated from an original CO2 system and an original low-pressure water-based local fire extinguishing system respectively, fire extinguishing equipment does not need to be additionally arranged, cost is saved, and ship arrangement is relatively simple.

Description

Technical Field

[0001] The utility model relates to the technical field of ship fire extinguishing, in particular to a ship lithium battery room fire extinguishing system. Background Art

[0002] Many ships today are equipped with large lithium batteries to store excess electrical energy on board. When a ship is moored at a port, there is no need to run the generator. The energy stored in the large lithium battery can be used directly to power the entire ship, achieving zero emissions at the port and making it green and environmentally friendly. The battery can also be used to reversely power the shaft-mounted generator, turning it into a motor, increasing the driving force of the ship's shaft system. In severe sea conditions, the battery can supplement the driving force of the main engine on the shaft system, ensuring the smooth operation of the main engine.

[0003] Lithium batteries have the risk of fire. Lithium batteries have a high capacity density and will undergo decomposition reactions at high temperatures. Multiple reactions will cause a large amount of heat to be generated, resulting in combustion and fire. Frequent overcharging or over-discharging will cause internal short circuits in lithium batteries, and prolonged external high current shocks will cause external short circuits. Both internal and external short circuits can cause lithium batteries to burn and catch fire.

[0004] Classification societies have three options for fire extinguishing in lithium battery rooms:

[0005] High-pressure water-based fire extinguishing system that meets the requirements of IMO MSC / Circ. 1165;

[0006] Inert gas fire extinguishing that complies with FSS Code Ch.5, IMO MSC / Circ.848;

[0007] Meets FSS Code Ch.5 CO2 gas fire extinguishing.

[0008] The first fire extinguishing method requires the installation of an additional high-pressure water-based fire extinguishing system, which is costly. The second or third fire extinguishing methods are less popular with shipowners, as gas fire extinguishing can only extinguish the open flames when a lithium battery fire occurs, but cannot control the large amount of heat continuously emitted by the lithium battery. This will result in a very long time to extinguish the fire in the lithium battery room, and may even cause the gas area near the lithium battery room to catch fire due to the high temperature. Utility Model Content

[0009] In order to solve the above technical problems, the utility model provides a fire extinguishing system for a ship's lithium battery room, which only separates a fire extinguishing branch from the original CO2 system and the low-pressure water-based local fire extinguishing system. No additional fire extinguishing equipment is required, which saves costs and makes the ship layout relatively simple.

[0010] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0011] A ship lithium battery room fire extinguishing system comprises a ship-wide CO2 fire extinguishing system and an engine room low-pressure water-based local fire extinguishing system, wherein the ship-wide CO2 fire extinguishing system is connected to the ship lithium battery room via at least one CO2 fire extinguishing branch pipe, the outlet end of the CO2 fire extinguishing branch pipe is located in the ship lithium battery room, and each CO2 fire extinguishing branch pipe located outside the ship lithium battery room is provided with a selection valve, which is connected to the ship-wide CO2 fire extinguishing system via a cable; the engine room low-pressure water-based local fire extinguishing system is connected to the ship lithium battery room via at least one low-pressure water fire extinguishing branch pipe, and each low-pressure water fire extinguishing branch pipe located inside a pump station is provided with an isolation valve, which is connected to a start control box via a cable.

[0012] Furthermore, the ship-wide CO2 fire extinguishing system includes a CO2 tank body, a low-pressure CO2 tank control cabinet, a fire control alarm panel and a fire control station. The CO2 tank body is connected to a CO2 fire extinguishing main pipe, and the low-pressure CO2 tank control cabinet is connected to a main air control pipeline. A branch air control pipeline is provided on the main air control pipeline. A pressure gauge and a pressure switch are provided at intervals on the side of the CO2 fire extinguishing main pipe away from the CO2 tank body. The connection point between the CO2 fire extinguishing branch pipe and the CO2 fire extinguishing main pipe is located between the pressure gauge and the pressure switch; the selection valve is connected to the branch air control pipeline, the selection valve is connected to the fire control alarm panel through a cable, and the fire control alarm panel is connected to the fire control station through a cable.

[0013] Furthermore, a shuttle valve is provided at one end of the branch air control pipeline close to the selection valve.

[0014] Furthermore, a CO2 nozzle is provided at the end of the CO2 fire extinguishing branch pipe.

[0015] Furthermore, the engine room low-pressure water-based local fire extinguishing system includes a pump station and a fresh water tank. A starting control box is provided in the pump station. The fresh water tank is connected to the ship's lithium battery through a low-pressure water fire extinguishing main pipe and two low-pressure water fire extinguishing branches. The two low-pressure water fire extinguishing branches are connected to the end of the low-pressure water fire extinguishing main pipe, and the two low-pressure water fire extinguishing branches are arranged in parallel.

[0016] Furthermore, the fire extinguishing system also includes a gas detector, a temperature detector, a ship sound and light alarm system and an addressable fire alarm probe. The gas detector, temperature detector, ship sound and light alarm system and addressable fire alarm probe are all arranged inside the lithium battery room, and the gas detector and temperature detector are telecommunication-connected to the ship sound and light alarm system; the ship sound and light alarm system and the addressable fire alarm probe are connected to the fire control alarm panel via a cable, and the addressable fire alarm probe is used to display the fire alarm area in the ship's monitoring computer.

[0017] Furthermore, a sewage high-level alarm is provided in the lithium battery room, a bilge water suction port is provided at the bottom of the lithium battery bilge, and the engine room bilge water pump is connected to the bottom of the lithium battery room through a pipe passing through the bilge water suction port.

[0018] Furthermore, the fire extinguishing system also includes an exhaust fan, which is connected to the lithium battery.

[0019] The working principle of this new marine lithium battery room fire extinguishing system is as follows: When a fire is detected in the battery room by gas or temperature detection, an alarm will sound on the ship's sound and light alarm system, and the fire area will be displayed on the ship's monitoring computer. After the crew makes a judgment based on these alarms, they will manually release CO2 gas to extinguish the fire and use the low-pressure water fire extinguishing system to cool the lithium batteries. In response to the high-level alarm of sewage in the battery room, the engine room bilge pump will be activated to suck out the accumulated water in the battery room. The crew does not need to enter the battery room, avoiding the inhalation of toxic and harmful gases. After the fire in the battery room is extinguished and the temperature of the lithium batteries has dropped to room temperature, the exhaust fan will be activated to extract the CO2 and other gases remaining in the battery room and replace them with fresh air. The crew can then enter the battery room for inspection.

[0020] This new fire-extinguishing system for a lithium battery room on a ship incorporates a fire-extinguishing branch from the ship's existing CO2 system to the battery room to extinguish open flames. It also incorporates a fire-extinguishing branch from the ship's existing low-pressure water-based local fire-extinguishing system to cool down any burning lithium batteries. A bilge water inlet is installed in the battery room to promptly remove water after spraying, preventing accumulation of water in the battery room and potential flooding of the batteries. This new fire-extinguishing method for the battery room has passed risk assessments conducted by lithium battery manufacturers and has been recognized by classification societies and shipowners. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the CO2 fire extinguishing system for a ship's lithium battery room according to the present invention;

[0022] Figure 2 The utility model is a structural schematic diagram of a low-pressure water-based local fire extinguishing system for a ship's lithium battery room engine room.

[0023] Among them, 1-CO2 tank, 2-low-pressure CO2 tank control cabinet, 3-fire control alarm panel, 4-fire control station, 5-CO2 fire extinguishing main pipe, 6-main air control pipeline, 7-branch air control pipeline, 8-pressure gauge, 9-pressure switch, 10-CO2 fire extinguishing branch pipe, 11-ship lithium battery room, 12-selector valve, 13-cable, 14-shuttle valve, 15-CO2 nozzle, 16-pump station, 17-fresh water tank, 18-start control box, 19-low-pressure water fire extinguishing main pipe, 20-low-pressure water fire extinguishing branch pipe, 21-isolation valve. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] like Figure 1-Figure 2 As shown, a ship lithium battery room fire extinguishing system includes a ship-wide CO2 fire extinguishing system and a cabin low-pressure water-based local fire extinguishing system. The ship-wide CO2 fire extinguishing system includes a CO2 tank body 1, a low-pressure CO2 tank control cabinet 2, a fire control alarm panel 3 and a fire control station 4. The CO2 tank body 1 is connected to a CO2 fire extinguishing main pipe 5, and the low-pressure CO2 tank control cabinet 2 is connected to a main gas control pipeline 6. A branch gas control pipeline 7 is provided on the main gas control pipeline 6. A pressure gauge 8 and a pressure switch 9 are provided at intervals on the side of the CO2 fire extinguishing main pipe 5 away from the CO2 tank body 1. The ship-wide CO2 fire extinguishing system is connected to the ship lithium battery room through at least one CO2 fire extinguishing branch pipe 10. The connection point between the CO2 fire extinguishing branch pipe 10 and the CO2 fire extinguishing main pipe 5 is located between the pressure gauge 8 and the pressure switch 9. The outlet end of the CO2 fire extinguishing branch pipe 10 is located in the ship's lithium battery room 11. The CO2 fire extinguishing branch pipe 10 located outside the ship's lithium battery room 11 is provided with a selection valve 12, which is connected to the branch air control pipeline 7. The selection valve 12 is connected to the fire control alarm panel 3 through a cable 13, and the fire control alarm panel 3 is connected to the fire control station 4 through a cable 13; a shuttle valve 14 is provided at one end of the branch air control pipeline 7 close to the selection valve 12, and a CO2 nozzle 15 is provided at the end of the CO2 fire extinguishing branch pipe 10.

[0026] The engine room low-pressure water-based local fire extinguishing system includes a pump station 16 and a fresh water tank 17. A starting control box 18 is provided in the pump station 16. The fresh water tank 17 is connected to the ship's lithium battery room 11 through a low-pressure water fire extinguishing main pipe 19 and two low-pressure water fire extinguishing branches 20. The two low-pressure water fire extinguishing branches 20 are connected to the end of the low-pressure water fire extinguishing main pipe 19, and the two low-pressure water fire extinguishing branches 20 are arranged in parallel; an isolation valve 21 is respectively provided on the low-pressure water fire extinguishing branch pipe 20 located inside the pump station 16, and the isolation valve 21 is connected to the starting control box 18 through a cable 13.

[0027] The fire extinguishing system also includes a gas detector, a temperature detector, an addressable fire alarm probe of the ship's sound and light alarm system and an exhaust fan. The gas detector, temperature detector, ship's sound and light alarm system and the addressable fire alarm probe are all arranged inside the lithium battery room, and the gas detector and temperature detector are telecommunication-connected to the ship's sound and light alarm system; the ship's sound and light alarm system and the addressable fire alarm probe are connected to the fire control alarm panel 3 via a cable 13, and the addressable fire alarm probe is used to display the fire alarm area on the ship's monitoring computer; the exhaust fan is connected to the lithium battery room; a sewage high-level alarm is provided in the lithium battery room, and a bilge water suction port is provided at the bottom of the lithium battery bilge, and the engine room bilge water pump is connected to the bottom of the lithium battery room through a pipe passing through the bilge water suction port.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire extinguishing system for a ship's lithium battery room, characterized in that: It includes a ship-wide CO2 fire extinguishing system and an engine room low-pressure water-based local fire extinguishing system. The ship-wide CO2 fire extinguishing system is connected to the ship's lithium battery room through at least one CO2 fire extinguishing branch pipe. The outlet end of the CO2 fire extinguishing branch pipe is located in the ship's lithium battery room. The CO2 fire extinguishing branch pipe located outside the ship's lithium battery room is provided with a selection valve, and the selection valve is connected to the ship's CO2 fire extinguishing system through a cable; the engine room low-pressure water-based local fire extinguishing system is connected to the ship's lithium battery room through at least one low-pressure water fire extinguishing branch pipe. An isolation valve is provided on each low-pressure water fire extinguishing branch pipe located inside the pump station, and the isolation valve is connected to the starting control box through a cable.

2. A fire extinguishing system for a ship lithium battery room according to claim 1, characterized in that: The ship-wide CO2 fire extinguishing system includes a CO2 tank body, a low-pressure CO2 tank control cabinet, a fire control alarm panel and a fire control station. The CO2 tank body is connected to a CO2 fire extinguishing main pipe, the low-pressure CO2 tank control cabinet is connected to a main air control pipeline, a branch air control pipeline is provided on the main air control pipeline, a pressure gauge and a pressure switch are provided at intervals on the side of the CO2 fire extinguishing main pipe away from the CO2 tank body, and the connection point between the CO2 fire extinguishing branch pipe and the CO2 fire extinguishing main pipe is located between the pressure gauge and the pressure switch; the selection valve is connected to the branch air control pipeline, the selection valve is connected to the fire control alarm panel through a cable, and the fire control alarm panel is connected to the fire control station through a cable.

3. A fire extinguishing system for a ship lithium battery room according to claim 2, characterized in that: A shuttle valve is provided at one end of the branch air control pipeline close to the selection valve.

4. A fire extinguishing system for a ship lithium battery room according to claim 3, characterized in that: A CO2 nozzle is provided at the end of the CO2 fire extinguishing branch pipe.

5. A fire extinguishing system for a ship lithium battery room according to claim 1, characterized in that: The engine room low-pressure water-based local fire extinguishing system includes a pump station and a fresh water tank. A starting control box is provided in the pump station. The fresh water tank is connected to the ship's lithium battery through a low-pressure water fire extinguishing main pipe and two low-pressure water fire extinguishing branches. The two low-pressure water fire extinguishing branches are connected to the end of the low-pressure water fire extinguishing main pipe, and the two low-pressure water fire extinguishing branches are arranged in parallel.

6. A fire extinguishing system for a ship lithium battery room according to claim 2, characterized in that: The fire extinguishing system also includes a gas detector, a temperature detector, a ship sound and light alarm system and an addressable fire alarm probe. The gas detector, temperature detector, ship sound and light alarm system and addressable fire alarm probe are all arranged inside the lithium battery room. The gas detector and temperature detector are telecommunication-connected to the ship sound and light alarm system; the ship sound and light alarm system and the addressable fire alarm probe are connected to the fire control alarm panel via cables, and the addressable fire alarm probe is used to display the fire alarm area on the ship's monitoring computer.

7. A fire extinguishing system for a ship lithium battery room according to claim 1, characterized in that: A sewage high-level alarm is provided in the lithium battery room, a bilge water suction port is provided at the bottom of the lithium battery bilge, and the engine room bilge water pump is connected to the bottom of the lithium battery room through a pipe passing through the bilge water suction port.

8. A fire extinguishing system for a ship lithium battery room according to claim 1, characterized in that: The fire extinguishing system further includes an exhaust fan, which is connected to the lithium battery.

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