Ship fire extinguishing system and control method thereof

Abstract

The invention discloses a ship fire extinguishing system which is provided with a water tank used for storing a fire extinguishing water source, the water tank is provided with a water inlet and a water outlet, the system is provided with a sea water pump, the output end of the sea water pump is connected with an inlet of a three-way water valve, and one outlet of the three-way water valve is connected with an inlet of a sea water filter through a pipeline. An outlet of the seawater filter is connected with a water tank through a pipeline, another outlet of the three-way water valve is connected with the water tank through a pipeline, the water tank is connected with a chemical tank through a pipeline, and a water outlet of the water tank is connected with a main fire-fighting pipeline through a booster pump. The fire extinguishing system for the ship has the advantages that various fire extinguishing technologies and safety protection measures are combined, the efficient and reliable fire extinguishing effect is achieved through the precise sensor layout and the intelligent control system, and safe navigation of the ship is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of ship fire extinguishing. Background Art

[0002] There are many electronic equipment, boilers, engine rooms, etc. in ships, which are prone to fire. Therefore, most ships are currently equipped with ship alarm and fire extinguishing systems. Conventional fire extinguishing systems use foam, stored water, or direct pumping to extinguish fires.

[0003] For example, the public document with publication number CN 111375160A, publication date July 7, 2020, and patent name "A Ship Fire Fighting System Based on Foam Fire Extinguishing" discloses a ship fire fighting system, including a dust removal system, a ventilation system, a fire detection system and a fire fighting system; the dust removal system is used to sense air particles in the cabin and perform automatic dust removal; the ventilation system is used to sense the air temperature and humidity in the cabin, and automatically exhaust and ventilate the cabin air; the fire detection system is used to receive relevant feedback information and monitor the dust removal system, ventilation system and fire fighting system; the fire fighting system is used to adjust the mixing ratio of fire extinguishing foam and water through the sensed temperature information of the cabin, and perform fire extinguishing and fire fighting treatment on the cabin.

[0004] With the development of electric technology, electric ships have begun to be put into service. Once a lithium battery fails and catches fire, the fire will spread rapidly. It may be difficult to suppress the fire using conventional fire-fighting methods. The most efficient way is to use a high-pressure package to pump water to extinguish the fire. If the ship sails to the ocean, the high-salt seawater will cause damage to a large number of devices inside the ship, and the cleaning work after the fire is extinguished will also be extremely difficult. There is currently no good solution. Summary of the invention

[0005] The technical problem to be solved by the present invention is to realize a fire extinguishing system which can meet the fire extinguishing requirements in marine transportation.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a ship fire extinguishing system, the system is provided with a water tank for storing water for fire extinguishing, the water tank is provided with a water inlet and a water outlet, the system is provided with a seawater pump, the output end of the seawater pump is connected to the inlet of a three-way water valve, one outlet of the three-way water valve is connected to the inlet of a seawater filter through a pipeline, the outlet of the seawater filter is connected to the water tank through a pipeline, the other outlet of the three-way water valve is connected to the water tank through a pipeline, the water tank is connected to a medicine box through a pipeline, and the water outlet of the water tank is connected to the main fire fighting pipeline through a booster pump.

[0007] A main valve is provided at the beginning of the fire main pipeline, and a plurality of fire branch pipelines are connected to the fire main pipeline. Each of the fire branch pipelines is provided with a branch valve, and a fire sensor is provided in the fire extinguishing area of ​​each fire branch pipeline. Each fire sensor outputs a sensing signal to the main control device, and the main control device is connected and outputs a control signal to the main valve and the branch valve.

[0008] The medicine box is provided with at least two independent sub-compartments, each of which is connected to the water tank via an independent sub-compartment pipeline, each of which is provided with a flow valve, and each of which is connected to the master control device.

[0009] The agent box contains seawater desalination agent and functional fire extinguishing agent. A stirring mechanism is arranged in the water tank. The master control device is connected to and outputs a control signal to the stirring mechanism.

[0010] The water tank and each sub-compartment are provided with water level sensors, each of the water level sensors is connected to and outputs a sensing signal to a master control device, and the master control device is connected to and outputs a control signal to a seawater pump and a three-way valve.

[0011] Based on the control method of the ship fire extinguishing system, when the fire sensor senses a fire, the main valve and the booster pump, as well as the branch valve of the fire branch pipe where the fire sensor is located, are controlled to open, and a fire alarm is sounded at the same time; when the fire sensor senses that the fire threat disappears or is manually closed, the main valve, the booster pump and the branch valve are closed, and the fire alarm is turned off at the same time.

[0012] When the water level in the water tank is lower than the set value, the seawater pump is started to pump water, and the water is filtered through the seawater filter and then transported to the water tank until the water level in the water tank reaches the upper limit value;

[0013] When the booster pump is started, the seawater pump is turned on at the same time to pump water, and the water is filtered through the seawater filter and then transported to the water tank. During the startup of the booster pump, if the water level is lower than the lower limit, the three-way valve is controlled to pump seawater directly into the water tank. At the same time, the agent tank is controlled to drip seawater desalination agent into the water tank, and the stirring mechanism is turned on.

[0014] When the reagent box drips seawater desalination reagent into the water tank, the dripping amount is positively correlated with the flow rate of the three-way valve.

[0015] After the control agent box drips seawater desalination agent into the water tank, when the fire sensor senses that the fire threat has disappeared or is manually closed, all the water in the water tank is drained. After draining, the seawater pump is started to pump water, and the water is filtered through the seawater filter and then transported to the water tank until the water level in the water tank reaches the upper limit.

[0016] Some fire sensors are bound to functional fire extinguishing agents. When the fire sensor senses a fire, the agent box is controlled to drip the bound functional fire extinguishing agent into the water tank, and the stirring mechanism is turned on at the same time. The amount of functional fire extinguishing agent dripped is positively correlated with the water level in the water tank.

[0017] The advantage of the present invention is that the marine fire extinguishing system combines a variety of fire extinguishing technologies and safety protection measures, and achieves efficient and reliable fire extinguishing effects through precise sensor layout and intelligent control system, thus ensuring safe navigation of ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents expressed in each figure in the specification of the present invention:

[0019] Figure 1 This is the principle block diagram of the ship fire extinguishing system. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation methods of the present invention, such as the shape, structure, relative position and connection relationship between the various components involved, the function and working principle of each part, the manufacturing process and operation method, etc., through the description of the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0021] The ship fire extinguishing system is equipped with a water tank for storing water for fire extinguishing. The water tank needs to be large enough to meet the regional fire extinguishing needs. The water tank is equipped with a water inlet and a water outlet. Water can be replenished as needed, and the water outlet can be used to discharge water for fire extinguishing when necessary. The water outlet of the water tank is connected to the fire main pipeline through a booster pump. The water outlet is connected to the beginning of the fire main pipeline, and a main valve is provided at the beginning of the fire main pipeline for switch control. There are multiple fire branch pipelines connected to the fire main pipeline, and each fire branch pipeline is equipped with a branch valve, which can independently control some fire branch pipes to start fire extinguishing. Fine water mist nozzles are provided on the fire branch pipelines to produce fine water mist, which extinguishes the fire through efficient cooling and suffocation. The position and alignment angle of the fine water mist nozzles need to be designed according to the layout scenario.

[0022] Fire sensors are installed in the fire-fighting area of ​​each fire branch pipe. The sensor layout design sensor system covers the key areas of the ship, including the engine room, cargo hold and personnel gathering area. Each area is equipped with dual fire detectors to prevent false alarms. When the detector detects a fire signal, it will immediately activate the sound and light alarm and send a signal to the control system. Each fire sensor outputs a sensing signal to the master control device, which connects and outputs a control signal to the main valve and branch valve. It can independently control a branch valve and the main valve to open as needed to extinguish the fire, and close the valve after the fire is extinguished. The control logic is that when the fire sensor senses a fire, it controls the opening of the main valve and booster pump, as well as the branch valve of the fire branch pipe where the fire sensor is located, and at the same time, a fire alarm is issued, and all fire alarms on the hull need to be activated. At the same time, the fire area needs to be displayed in the master control room. When the fire sensor senses that the fire threat disappears or is manually closed, the main valve, booster pump and branch valve are closed, and the fire alarm is closed at the same time.

[0023] The system is equipped with a seawater pump to draw seawater from the seabed gate and supply it to the fire-fighting system after purification through the filter. The system can also be connected to the C02 gas cylinder through a pipeline to store high-pressure liquid C02 for rapid extinguishing of large fires. Combined with the water fire extinguishing function, the fire extinguishing effect is improved. The system combines a variety of fire-fighting technologies and safety protection measures. The system mainly includes a seawater-based fire-fighting system, a CO2 fire-fighting system and a fine water mist fire-fighting system to ensure that the fire source can be extinguished quickly and effectively under various fire conditions.

[0024] The output end of the seawater pump is connected to the inlet of the three-way water valve, one outlet of the three-way water valve is connected to the inlet of the seawater filter through a pipe, and the outlet of the seawater filter is connected to the water tank through a pipe to achieve filtration before use to prevent seawater from corroding the components in the cabin and the hull. At the same time, the other outlet of the three-way water valve is connected to the water tank through a pipe, and water can be pumped directly instead of filtering, because the efficiency of filtration certainly cannot meet the demand for large amounts of water for fire extinguishing. Therefore, when the water level is too low, the three-way valve can be directly controlled to pump the pumped water directly into the water tank. The control logic is that when the booster pump is started, it means that the water in the water tank has begun to flow. At this time, the seawater pump is directly turned on to pump water, and the water is pumped directly into the water tank through the booster pump. After being filtered by the seawater filter, it is transported to the water tank. The filtering speed is definitely lower than the usage speed. During the startup of the booster pump, if the water level is lower than the lower limit, the value can be designed as needed to control the three-way valve to pump seawater directly into the water tank, close the seawater filter, and at the same time control the agent box to drip seawater desalination agent into the water tank, and turn on the stirring mechanism to use the agent for seawater desalination. Because the price of agent consumables is high, try to use it as little as possible, and use it when the water level is low and the fire is not extinguished; when the agent box drips seawater desalination agent into the water tank, the amount dripped is positively correlated with the flow rate of the three-way valve, which ensures the accuracy of the use of the agent and reduces the use of consumables.

[0025] When the seawater desalination agent is exhausted, the master control equipment will remind you whether to use untreated water to extinguish the fire. This requires manual determination. The staff needs to judge based on the current fire situation whether to use corrosive seawater regardless of the loss, or whether the fire has been basically controlled and seawater should not be used directly to reduce losses. This reminder is allowed by default after a set time (such as 15S) to avoid the fire from spreading when no one is guarding the main control room. And only when no one is guarding the main control room, it means that the fire situation is already very serious.

[0026] After the control agent box drips seawater desalination agent into the water tank, when the fire sensor senses that the fire threat has disappeared or is manually closed, all the water in the water tank is discharged. The agent itself is toxic, and this part of the water is not as "clean" as filtered water. Therefore, after using the seawater desalination agent, if there is no fire, the water tank needs to be emptied. An independent drainage mechanism can be set up in the water tank. After draining, start the seawater pump to pump water, and then filter it through the seawater filter and transport it to the water tank until the water level in the water tank reaches the upper limit, and then fill it with filtered seawater again. When the water level in the water tank is lower than the set value, start the seawater pump to pump water, and then filter it through the seawater filter and transport it to the water tank until the water level in the water tank reaches the upper limit.

[0027] Water level sensors are installed in the water tank and each compartment. Each water level sensor is connected and outputs sensing signals to the master control device, which is connected and outputs control signals to the seawater pump and three-way valve. The master control device is the core of the fire extinguishing system, responsible for receiving sensor signals and automatically or manually starting the corresponding fire extinguishing device according to the fire situation. The system has a partition control function, which can accurately extinguish fires in different areas. It is equipped with a remote control interface, allowing the crew to monitor and control the fire extinguishing system in a safe area. The interface displays the system status sensor alarm information and partition control buttons to facilitate rapid response to fires.

[0028] The reagent box is provided with at least two independent compartments, each of which is connected to the water tank through an independent compartment pipe. Each compartment pipe is provided with a flow valve, and each flow valve is connected to the master control device. The reagent box stores seawater desalination agent and functional fire extinguishing agent. There are multiple functional fire extinguishing agents, which can be placed in different compartments. Each functional fire extinguishing agent can be used for different scenes, such as the oil room, control room, etc. Different agents can be equipped according to the characteristics of the scene. A stirring mechanism is provided in the water tank to increase the mixing effect of the agent. The master control device is connected and outputs a control signal to the stirring mechanism. When the reagent box is put into use, the stirring mechanism is started, and the stirring mechanism is closed after the agent is stopped. Some fire sensors are bound to functional fire extinguishing agents. When the fire sensor senses a fire, the reagent box is controlled to drip the bound functional fire extinguishing agent into the water tank, and the stirring mechanism is turned on at the same time. The amount of functional fire extinguishing agent dripped is positively correlated with the water level in the water tank.

[0029] The above structure can realize the automatic fire extinguishing function of the sea-going vessel and can pre-treat the seawater. When the fire is too large, the seawater supply can be increased by changing the filtering method to improve the fire extinguishing ability. The graded water treatment method can reduce the impact of seawater on the cabin as much as possible, and can use seawater in dangerous situations to reduce the impact of the fire on the ship through different decision logics.

[0030] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A ship fire extinguishing system, the system is provided with a water tank for storing water for fire extinguishing, the water tank is provided with a water inlet and a water outlet, characterized in that: The system is provided with a seawater pump, the output end of the seawater pump is connected to the inlet of a three-way water valve, one outlet of the three-way water valve is connected to the inlet of a seawater filter through a pipeline, the outlet of the seawater filter is connected to a water tank through a pipeline, the other outlet of the three-way water valve is connected to the water tank through a pipeline, the water tank is connected to a medicine box through a pipeline, and the water outlet of the water tank is connected to the main fire-fighting pipeline through a booster pump.

2. The ship fire extinguishing system according to claim 1, characterized in that: A main valve is provided at the beginning of the fire main pipeline, and a plurality of fire branch pipelines are connected to the fire main pipeline. Each of the fire branch pipelines is provided with a branch valve, and a fire sensor is provided in the fire extinguishing area of ​​each fire branch pipeline. Each fire sensor outputs a sensing signal to the main control device, and the main control device is connected and outputs a control signal to the main valve and the branch valve.

3. The ship fire extinguishing system according to claim 2, characterized in that: The medicine box is provided with at least two independent sub-compartments, each of which is connected to the water tank via an independent sub-compartment pipeline, each of which is provided with a flow valve, and each of which is connected to the master control device.

4. The ship fire extinguishing system according to claim 3, characterized in that: The agent box contains seawater desalination agent and functional fire extinguishing agent. A stirring mechanism is arranged in the water tank. The master control device is connected to and outputs a control signal to the stirring mechanism.

5. The ship fire extinguishing system according to claim 4, characterized in that: The water tank and each sub-compartment are provided with water level sensors, each of the water level sensors is connected to and outputs a sensing signal to a master control device, and the master control device is connected to and outputs a control signal to a seawater pump and a three-way valve.

6. A control method for a ship fire extinguishing system according to any one of claims 1 to 5, characterized in that: When the fire sensor senses a fire, it controls the opening of the main valve and the booster pump, as well as the branch valve of the fire branch pipe where the fire sensor is located, and sounds a fire alarm at the same time. When the fire sensor senses that the fire threat has disappeared or is manually closed, it closes the main valve, booster pump and branch valve, and turns off the fire alarm at the same time.

7. The control method of a ship fire extinguishing system according to claim 6, characterized in that: When the water level in the water tank is lower than the set value, the seawater pump is started to pump water, and the water is filtered through the seawater filter and then transported to the water tank until the water level in the water tank reaches the upper limit value; When the booster pump is started, the seawater pump is turned on at the same time to pump water, and the water is filtered through the seawater filter and then transported to the water tank. During the startup of the booster pump, if the water level is lower than the lower limit, the three-way valve is controlled to pump seawater directly into the water tank. At the same time, the agent tank is controlled to drip seawater desalination agent into the water tank, and the stirring mechanism is turned on.

8. The control method of a ship fire extinguishing system according to claim 7, characterized in that: When the reagent box drips seawater desalination reagent into the water tank, the dripping amount is positively correlated with the flow rate of the three-way valve.

9. The control method of a ship fire extinguishing system according to claim 8, characterized in that: After the control agent box drips seawater desalination agent into the water tank, when the fire sensor senses that the fire threat has disappeared or is manually closed, all the water in the water tank is drained. After draining, the seawater pump is started to pump water, and the water is filtered through the seawater filter and then transported to the water tank until the water level in the water tank reaches the upper limit.

10. The control method of a ship fire extinguishing system according to claim 6, 7, 8 or 9, characterized in that: Some fire sensors are bound to functional fire extinguishing agents. When the fire sensor senses a fire, the agent box is controlled to drip the bound functional fire extinguishing agent into the water tank, and the stirring mechanism is turned on at the same time. The amount of functional fire extinguishing agent dripped is positively correlated with the water level in the water tank.

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