Carbon dioxide and water-based spraying combined type partitioned fire extinguishing system of roll-on-roll-off ship

Abstract

The utility model provides a carbon dioxide and water-based spraying combined type zoning fire extinguishing system for a roll-on-roll-off ship, each vehicle cabin is divided into a plurality of fire fighting zones, the fire extinguishing system comprises a carbon dioxide storage container, a water-based spraying combined type fire extinguishing system and a water-based spraying combined type fire extinguishing system, and the carbon dioxide storage container is provided with a release valve; the fire-fighting main pipe is connected with the carbon dioxide storage container and is connected with the water-based fire extinguishing system through a water-based pipeline; each fire-fighting subarea is provided with a set of fire-fighting branch pipes, the fire-fighting branch pipes are connected with a fire-fighting main pipe, and one end, close to the fire-fighting main pipe, of each fire-fighting branch pipe is provided with a release isolation valve; the cleaning system is connected with the fire-fighting main pipe and comprises an air pump, and purging gas is input into the fire-fighting main pipe and the fire-fighting branch pipes through the air pump; the release valve and the water-based control valve cannot be opened at the same time. Based on slight adjustment of an existing fire extinguishing system frame, the fire extinguishing mode combining carbon dioxide and seawater is achieved, cost is low, and the fire extinguishing effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to a roll on roll off ship, in particular to a carbon dioxide and water-based spray combined type subarea fire extinguishing system for roll on roll off ship. BACKGROUND

[0002] The fire fighting of the vehicle cabin of the roll on roll off ship is a major problem that cannot be ignored, and once the fire breaks out, it may lead to the damage of the whole cabin and the whole ship, even the ship, causing huge life and property losses. At present, the roll on roll off ship is developing towards large-scale, and the loading capacity of the vehicle cabin is getting larger and larger, and with the evolution of the automobile industry, new energy vehicles such as pure electric vehicles, hybrid vehicles, hydrogen energy vehicles and natural gas power vehicles also begin to be loaded in large quantities in the roll on roll off ship, and the risk and harm of the fire of the new energy vehicles are higher than those of the traditional fuel vehicles. These all put forward higher requirements for the fire fighting of the vehicle cabin.

[0003] Based on the regulatory requirements and the actual needs, the vehicle cabin of the roll on roll off ship is generally equipped with a fixed fire extinguishing system, such as a fixed carbon dioxide fire extinguishing system or a fixed pressure water mist system, and the carbon dioxide fire extinguishing system is the most common one on the actual ship.

[0004] The usual practice is to set up a place specially storing carbon dioxide fire extinguishing agent, and a pipe is arranged for each vehicle cabin to connect the carbon dioxide release main pipe, so as to take carbon dioxide from the carbon dioxide storage container. The nozzles are uniformly arranged on the pipes in the cargo cabin, so that the carbon dioxide can be effectively released and fill the whole cargo cabin as soon as possible, thereby achieving the purpose of fire extinguishing.

[0005] The main disadvantage of the carbon dioxide fire extinguishing system of the vehicle cabin is that it can only be released once regardless of the presence or absence of fire and the size of the fire. Thus, it is possible to waste carbon dioxide due to misjudgment of the fire, and further affect the subsequent safety of the ship. Moreover, the carbon dioxide cannot effectively extinguish the fire caused by the thermal runaway of some new energy vehicles, which also increases the safety hazard of the vehicle cabin for automobile loading. In addition, some accidents have shown that the fire has not been completely extinguished after the release of carbon dioxide, and the opening of the cabin may cause a secondary fire and endanger the safety of the crew.

[0006] In view of the above shortcomings, the utility model adopts the fire extinguishing method combining carbon dioxide and water-based spray to provide higher level protection for the vehicle cabin. CONTENT OF THE UTILITY MODEL

[0007] The utility model provides a carbon dioxide and water-based spray combined type subarea fire extinguishing system for roll on roll off ship, the roll on roll off ship is divided into a plurality of vehicle cabin rooms, each vehicle cabin room is divided into a plurality of fire fighting subareas, the roll on roll off ship is provided with a water-based fire extinguishing system, and the combined type fire extinguishing system comprises:

[0008] A thermal imaging probe is installed in the obliquely upper corner of each fire fighting subarea;

[0009] The carbon dioxide storage container stores liquid carbon dioxide, and is provided with a carbon dioxide release valve;

[0010] The fire main is connected with the carbon dioxide storage container, and is connected with the water-based fire extinguishing system through a water-based pipeline, wherein the water-based pipeline is provided with a water-based control valve;

[0011] Each fire sub-zone is provided with a set of fire branch pipes, the fire branch pipes are connected with the fire main, one end of each fire branch pipe close to the fire main is provided with a release isolation valve, the fire branch pipes located in the fire sub-zone are provided with a plurality of automatic rotary fire nozzles, and the inner walls of the fire main and the fire branch pipes are provided with anticorrosive coatings;

[0012] The cleaning system is connected with the fire main, and comprises an air pump for inputting purge gas into the fire main and the fire branch pipes;

[0013] The fire control system is in communication connection with the thermal imaging probe, the carbon dioxide release valve, the water-based control valve, the release isolation valve and the cleaning system, and the carbon dioxide release valve and the water-based control valve cannot be opened at the same time.

[0014] Further, the anticorrosive coating is epoxy asphalt.

[0015] Further, the fire main and the fire branch pipes are made of seamless galvanized steel pipes, the fire main is connected with the fire branch pipes, the carbon dioxide storage container and the water-based fire extinguishing system through flanges, and PTFE gaskets are arranged at the flange connection positions.

[0016] Further, the vehicle cabin is divided into a plurality of fire sub-zones at intervals of 20-50 m.

[0017] Further, one end of the water-based fire extinguishing system connected with seawater is provided with a horn water inlet, the horn water inlet is provided with a biological filter screen, and a variable frequency water pump is arranged on the water-based pipeline.

[0018] The utility model has the advantages that:

[0019] 1) low cost, mainly based on the existing system framework, additional equipment or pipeline is less, and the seawater is convenient and low in cost.

[0020] 2) low probability of carbon dioxide mis-spraying and waste, when a potential fire risk is found, the target cargo hold can be cooled and cooled by water-based spraying, and the fire risk is reduced, when the fire expands and cannot be controlled, carbon dioxide is used for whole-cabin fire extinguishing, so that carbon dioxide mis-spraying can be effectively avoided, and the utilization rate of carbon dioxide is improved.

[0021] 3) Better fire extinguishing effect, lower risk of secondary fire. When a fire occurs, after releasing carbon dioxide to extinguish the fire in the whole cabin, water-based spraying is used for secondary fire extinguishing and cooling of the target cargo cabin, effectively enhancing the fire extinguishing effect, avoiding incomplete fire extinguishing, and reducing the risk of secondary fire.

[0022] 4) The fire extinguishing method combining carbon dioxide and water-based spraying can not only effectively deal with the fire of traditional fuel vehicles, but also provide more effective fire extinguishing means for the fire caused by thermal runaway of new energy vehicle batteries, greatly reducing the safety hidden danger when the vehicle cabin is loaded with new energy vehicles.

[0023] When implementing the fire extinguishing system of the utility model, first, the vehicle cabin of the roll-on / roll-off ship needs to be partitioned, and each partition is equipped with a thermal imaging probe for real-time monitoring of fire. When the thermal imaging probe detects abnormal temperature rise, it will immediately send a signal to the fire control system. After receiving the signal, the fire control system will determine whether to start the water-based spraying system for preliminary fire extinguishing or directly release carbon dioxide for rapid fire extinguishing according to the severity and location of the fire.

[0024] When the water-based spraying system starts, the water-based control valve opens, seawater is sucked into the water-based pipeline through the variable frequency water pump, and is sprayed out through the automatic rotating fire nozzle on the fire branch pipe to cool and lower the temperature of the target cargo cabin. If the fire cannot be effectively controlled, the fire control system will open the carbon dioxide release valve to release liquid carbon dioxide for whole cabin fire extinguishing.

[0025] In addition, the cleaning system works regularly to input purge gas into the fire main pipe and fire branch pipe through the air pump to remove residues and scale in the pipeline, ensuring the smoothness and high efficiency of the fire extinguishing system. Through this combined partition fire extinguishing system, the vehicle cabin of the roll-on / roll-off ship can be more safely and effectively protected by fire. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 It is a structure schematic view of the utility model's roll-on / roll-off ship vehicle cabin carbon dioxide and water-based spraying combined fire extinguishing system.

[0028] Figure 2 It is a control principle diagram of the utility model. DETAILED DESCRIPTION

[0029] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail to avoid obscuring aspects of the present application.

[0030] In order to thoroughly understand the present application, detailed steps and detailed structures will be presented in the following description in order to explain the technical scheme of the present application. The preferred embodiments of the present application are described in detail as follows, however, in addition to these detailed descriptions, the present application can also have other implementation manners.

[0031] Referring to Figures 1-2 As shown in the figure, the present application provides a carbon dioxide and water-based spray combined partition fire extinguishing system for a roll-on / roll-off ship. The roll-on / roll-off ship is divided into multiple vehicle cabins 1, and each vehicle cabin 1 is divided into multiple fire-fighting partitions 11. As shown in the figure, the roll-on / roll-off ship is divided into three vehicle cabins A, B and C, and each vehicle cabin is further divided into two fire-fighting partitions, i.e. A1 and A2, B1 and B2, and C1 and C2. Figure 1

[0032] The thermal imaging probe 3 is installed in the obliquely upper corner of each fire-fighting partition 11 to realize thermal imaging detection of the full range of each fire-fighting partition 11. The principle of the thermal imaging probe 3 is to capture the infrared radiation of the surface of an object, convert the temperature distribution into a visible image, and thus realize real-time monitoring of the development of a fire. Each probe is connected to the fire control system 8, and once an abnormal temperature rise is detected, the system will automatically analyze and determine whether it is a fire, and if it is confirmed to be a fire, the system will start the corresponding fire extinguishing program. In addition, the thermal imaging probe 3 also has night vision function to ensure that it can effectively monitor temperature abnormalities in an environment with insufficient light.

[0033] ​The carbon dioxide storage container 4 stores liquid carbon dioxide, and has a certain pressure to enable the carbon dioxide to be stored in a liquid state. The carbon dioxide storage container 4 is provided with a carbon dioxide release valve 41. The carbon dioxide release valve 41 can release the carbon dioxide to the fire main pipe 5. When the carbon dioxide release valve 41 is opened, the liquid carbon dioxide stored in the carbon dioxide storage container 4 passes through the carbon dioxide release valve 41 to form gaseous carbon dioxide and is delivered to the corresponding fire branch pipe 6. It should be noted that the temperature and pressure of the fire main pipe 5 are different from those of the carbon dioxide storage container 4. When the liquid carbon dioxide passes through the fire main pipe 5, it will automatically change into a gaseous state. The principle and the corresponding structure achieved are well known to those skilled in the art, and will not be described here.

[0034] The fire main pipe 5 is connected to the water-based fire extinguishing system 2 through the water-based pipeline 21. The water-based fire extinguishing system 2 is connected to seawater at one end and is provided with a trumpet-shaped water inlet 22. The trumpet-shaped water inlet 22 has the advantage that its design can effectively increase the cross-sectional area of the water flow, thereby improving the water intake efficiency. The trumpet-shaped water inlet 22 is provided with a biological filter screen. The biological filter screen is a filter screen with a biological coating on the surface. The biological filter screen can prevent marine organisms and debris from entering the water-based pipeline 21, and can also prevent marine organisms from adhering to the surface of the filter screen. The water-based fire extinguishing system 2 includes a variable frequency water pump 23 arranged on the water-based pipeline 21. The variable frequency water pump 23 extracts seawater as fire water. The water-based pipeline 21 between the variable frequency water pump 23 and the fire main pipe 5 is provided with a water-based control valve 24.

[0035] The fire branch pipes 6 are connected to the fire main pipe 5 at one end and are arranged in different fire sub-areas 11 at the other end. Each fire branch pipe 6 is provided with a release isolation valve 61. The fire branch pipes 6 located in the vehicle cabin 1 are provided with a plurality of automatic rotating fire nozzles 62. The automatic rotating fire nozzles 62 are impacted by high-pressure carbon dioxide or seawater from the pipeline, and the nozzle part can rotate, thereby achieving 360-degree fire coverage without dead angles and improving the fire extinguishing effect.

[0036] In an optional embodiment, the fire main pipe 5 and the fire branch pipe 6 serve as a pipeline for transporting carbon dioxide or seawater, and higher requirements are placed on the corrosion resistance of the pipeline. In this application, a seamless steel pipe made of steel material with certain corrosion resistance is used as the fire main pipe 5 and the fire branch pipe 6. In addition, an epoxy asphalt corrosion-resistant coating is arranged on the inner wall of the fire main pipe 5 and the fire branch pipe 6. The epoxy asphalt corrosion-resistant coating has good adhesion and chemical corrosion resistance, and can effectively prevent the corrosion of seawater and carbon dioxide on the pipeline. In the manufacturing process, the inside of the seamless galvanized steel pipe is first treated to remove rust, then the inside is sprayed with an epoxy asphalt corrosion-resistant coating, and finally high-temperature curing treatment is performed to ensure that the coating is tightly combined with the steel pipe, forming a solid protective layer.

[0037] In order to further improve the durability and safety of the fire main pipe 5 and the fire branch pipe 6, the utility model also adopts a new type of connection mode. At the connection of the fire main pipe 5 and the fire branch pipe 6, special flange connectors are used, which have higher strength and corrosion resistance. The special flange connector is made of stainless steel material, which improves its ability to resist seawater and carbon dioxide corrosion. PTFE (polytetrafluoroethylene) gaskets are provided at the flange connection, which can effectively prevent leakage at the flange connection in high temperature environment due to its excellent high temperature resistance, corrosion resistance and low friction coefficient. In addition, the PTFE gasket also has good anti-aging performance, which can maintain the stability of its physical and chemical properties during long-term use, thereby ensuring the long-term reliability of the fire pipe system.

[0038] The fire control system 8 is connected with the thermal imaging probe 3, the carbon dioxide release valve 41, the variable frequency water pump 23, the water-based control valve 24 and the release isolation valve 61, and according to different fire conditions, the carbon dioxide extinguishing system or the seawater extinguishing system is appropriately opened. It should be noted that the carbon dioxide release valve 41 and the water-based control valve 24 cannot be opened at the same time. The fire control system 8 can automatically or manually start the corresponding fire extinguishing measures according to the severity of the fire and the cabin position. According to different fire conditions, carbon dioxide extinguishing or seawater extinguishing is selectively performed. For example, if the fire occurs in the vehicle cabin, the system will first start the seawater extinguishing, and when the fire spreads and cannot be controlled, the seawater extinguishing system is closed and the carbon dioxide is opened for whole cabin extinguishing. Thus, carbon dioxide mis-spraying can be effectively avoided, and the utilization rate of carbon dioxide can be improved.

[0039] The cleaning system 7 is connected with the third input end of the fire main pipe 5, and the electric control part of the cleaning system 7 is connected with the fire control system 8. The cleaning system contains an air pump, which inputs purge gas into the inside of the fire main pipe 5 and the fire branch pipe 6 to clean. When a fire branch pipe 6 triggers the carbon dioxide or water extinguishing system, carbon dioxide or seawater will be left on the inner wall of the pipe. Although the pipe is made of corrosion-resistant galvanized carbon steel pipe, in order to ensure the cleanliness and extinguishing effect of the pipe system, the cleaning system 7 can remove impurities and water vapor in the purge gas. In this way, when the air pump is working, the cleaning gas can not only remove the residues on the inner wall of the pipe, but also ensure the purity of the purge gas, thereby avoiding pipe corrosion caused by impurities or moisture. Preferably, the starting time of the cleaning system 7 is after the seawater extinguishing is completed, the carbon dioxide release valve 41 and the water-based control valve 24 are closed, the release isolation valve 61 of the fire branch pipe 6 to be cleaned is opened, and then the cleaning system 7 is opened to input purge gas into the fire branch pipe 6 to clean, and the remaining water in the pipeline is cleaned to keep the inside dry.

[0040] The working process of the utility model is:

[0041] When the thermal imaging probe 3 detects a fire, it will immediately send a signal to the fire control system 8. The fire control system 8 will automatically decide whether to activate the carbon dioxide extinguishing system or the seawater extinguishing system based on the severity and location of the fire. Of course, manual control is also possible.

[0042] If the seawater extinguishing system is chosen, the fire control system 8 will activate the variable frequency water suction pump 23, and seawater will be sucked in through the water-based pipeline 21, pass through the water-based control valve 24, and then be transported into the fire main pipe 5, through the fire branch pipe 6 into the corresponding fire sub-area 11, and extinguished through the automatic rotating fire nozzle 62. The seawater extinguishing system is suitable for extinguishing fires of solid materials, especially in situations where carbon dioxide extinguishing cannot be used.

[0043] If the carbon dioxide extinguishing system is chosen, the fire control system 8 will open the carbon dioxide release valve 41 and close the water-based control valve 24. Carbon dioxide in the carbon dioxide storage container 4 will be released through the carbon dioxide release valve 41 into the fire main pipe 5, then transported through the fire branch pipe 6 into the corresponding fire sub-area 11, and extinguished through the automatic rotating fire nozzle 62. During the carbon dioxide extinguishing process, because the density of carbon dioxide is greater than that of air, it will quickly settle at the bottom of the cabin, covering the fire source, thereby achieving the effect of suffocating the flame. At the same time, because carbon dioxide is an inert gas, it will not chemically react with the burning material, so it will not cause damage to the electronic equipment inside the vehicle.

[0044] In addition, water-based spraying can be used to cool the target cargo hold first to reduce the risk of fire. When the fire spreads and cannot be controlled, the water-based control valve 24 is closed and carbon dioxide is used for whole-cabin extinguishing. This can effectively avoid carbon dioxide mis-spraying and improve the utilization rate of carbon dioxide.

[0045] After completing the extinguishing task, the fire control system 8 will take a series of measures to ensure the safety and cleanliness of the system. First, the fire control system 8 will be responsible for closing the carbon dioxide release valve 41 or the water-based control valve 24, which is to ensure that the extinguishing agent used during the extinguishing process does not continue to leak, thereby avoiding further impact on the environment and personnel. After closing the valve, the fire control system 8 will start the cleaning system 7 according to the actual situation and needs.

[0046] The main function of the cleaning system 7 is to inject a purge gas into the fire main pipe 5 and the fire branch pipe 6 through a gas pump to completely remove any remaining extinguishing agent and seawater on the pipe wall. This process is crucial for maintaining the cleanliness and smoothness of the fire pipeline system.

[0047] In this way, the sweep gas flows inside the pipe, which can strip the residues from the pipe wall and carry them out of the pipe system, thereby ensuring the cleanliness of the inside of the pipe. This is particularly important to prevent corrosion problems caused by residues. Corrosion not only shortens the service life of the fire-fighting pipe, but also can cause the pipe to leak or other safety problems in future use. Therefore, thorough sweeping by the cleaning system 7 can effectively prevent these problems from occurring, ensuring the long-term stable operation of the fire-fighting system.

[0048] The preferred embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, and that the equipment and structures not fully described should be understood as being implemented in the ordinary way in the art; any person skilled in the art, without departing from the scope of the technical scheme of the present application, can make many possible changes and modifications to the technical scheme of the present application by using the disclosed methods and technical contents, or modify it into equivalent embodiments with equivalent changes, which does not affect the essential content of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical essence of the present application, which does not deviate from the content of the technical scheme of the present application, still belongs to the scope of protection of the technical scheme of the present application.

Claims

1. A combined carbon dioxide and water-based sprinkler fire suppression system for a roll-on / roll-off (Ro-Ro) ship, wherein the Ro-Ro ship is divided into multiple vehicle compartments (1), each vehicle compartment (1) is further divided into multiple fire-fighting zones (11), and the Ro-Ro ship is equipped with a water-based fire suppression system (2), characterized in that, A combined fire suppression system includes: Thermal imaging probe (3) is installed in the upper corner of each fire compartment (11); A carbon dioxide storage container (4) is provided with a carbon dioxide release valve (41). The carbon dioxide storage container (4) contains liquid carbon dioxide. Fire main pipe (5) is connected to carbon dioxide storage container (4), and fire main pipe (5) is connected to water-based fire extinguishing system (2) through water-based pipeline (21). Water-based control valve (24) is installed on water-based pipeline (21). Fire branch pipe (6), each fire compartment (11) is equipped with a set of fire branch pipe (6), the fire branch pipe (6) is connected to the fire main pipe (5), each fire branch pipe (6) is equipped with a release isolation valve (61) at the end near the fire main pipe (5), the fire branch pipe (6) located in the fire compartment (11) is equipped with multiple automatic rotating fire sprinklers (62), the inner walls of the fire main pipe (5) and the fire branch pipe (6) are equipped with anti-corrosion coating; Cleaning system (7) is connected to fire main pipe (5). Cleaning system (7) includes an air pump that supplies purging gas into the fire main pipe (5) and fire branch pipe (6). The fire control system (8) is connected in communication with the thermal imaging probe (3), carbon dioxide release valve (41), water-based control valve (24), release isolation valve (61), and cleaning system (7). The carbon dioxide release valve (41) and water-based control valve (24) cannot be opened at the same time.

2. The combined carbon dioxide and water-based sprinkler system for zoned fire suppression as described in claim 1, characterized in that, The anti-corrosion coating is epoxy asphalt.

3. The combined carbon dioxide and water-based sprinkler system for zoned fire suppression as described in claim 1, characterized in that, The main fire pipe (5) and the branch fire pipe (6) are made of seamless galvanized steel pipe. The main fire pipe (5) is connected to the branch fire pipe (6), the carbon dioxide storage container (4), and the water-based fire extinguishing system (2) through flanges respectively. PTFE gaskets are provided at the flange connections.

4. The combined carbon dioxide and water-based sprinkler system for zoned fire suppression as described in claim 1, characterized in that, The vehicle compartment (1) is divided into multiple fire-fighting zones (11) at equal intervals of 20 to 50m.

5. The combined carbon dioxide and water-based sprinkler system for zoned fire suppression as described in claim 1, characterized in that, The water-based fire extinguishing system (2) is equipped with a horn-shaped water intake (22) at one end connected to the seawater, and the horn-shaped water intake (22) is equipped with a biological filter screen; A variable frequency water intake pump (23) is installed on the water-based pipeline (21).

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