Firefighting equipment on liquefied gas carriers
The fire extinguishing system on a liquefied gas carrier maintains firefighting capabilities by supplying water from multiple points along the piping system, ensuring continuous protection of critical areas despite pipe damage.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KAWASAKI JUKOGYO KK
- Filing Date
- 2023-01-25
- Publication Date
- 2026-07-07
Smart Images
Figure 0007886438000001 
Figure 0007886438000002
Abstract
Description
Technical Field
[0001] The present disclosure relates to a fire extinguishing facility for a liquefied gas carrier.
Background Art
[0002] The following Patent Document 1 discloses a liquefied gas carrier.
Prior Art Document
Patent Document
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] A liquefied gas carrier includes a cargo area that houses liquefied gas tanks. A fire extinguishing facility is installed on the liquefied gas carrier, and the fire extinguishing facility may include pipes that pass through the cargo area. In this case, if a fire breaks out in the cargo area, a part of the pipes of the fire extinguishing facility may be damaged, and there is a risk that the fire extinguishing activity cannot be continued.
[0005] Therefore, an object of the present disclosure is to provide a fire extinguishing facility for a liquefied gas carrier that can continue the fire extinguishing activity even if a part of the pipes passing through the cargo area is damaged.
Means for Solving the Problems
[0006] The fire extinguishing facility for a liquefied gas carrier according to one aspect of the present disclosure includes a first pipe that extends from a stern area behind the cargo area to a bow area in front of the cargo area through a cargo area that houses liquefied gas tanks and through which water used in a fire flows, and a second pipe that includes a front supply port capable of supplying water into the first pipe from a portion of the first pipe in front of the cargo area.
Effects of the Invention
[0007] This configuration allows firefighting operations to continue even if a portion of the piping passing through the cargo area is damaged. [Brief explanation of the drawing]
[0008] [Figure 1] Figure 1 is a side view of a liquefied gas carrier equipped with fire extinguishing equipment. [Figure 2] Figure 2 is a plan view of a liquefied gas carrier equipped with fire extinguishing equipment. [Modes for carrying out the invention]
[0009] <Liquefied gas carrier> The embodiments will be described below. First, the liquefied gas carrier 101 on which the fire extinguishing equipment 100 is installed will be described. Figure 1 is a side view of the liquefied gas carrier 101 on which the fire extinguishing equipment 100 is installed. Figure 2 is a top view of the liquefied gas carrier 101 on which the fire extinguishing equipment 100 is installed. In the following, the right side of Figure 2 will be referred to as the "front," the left side as the "rear," the left-right direction as the "front-back direction," and the up-down direction as the "width direction."
[0010] As shown in Figure 1, the liquefied gas carrier 101 is equipped with a cargo area 102, a bow area 103, and a stern area 104.
[0011] The cargo area 102 is an area that houses liquefied gas tanks 105. In this embodiment, the cargo area 102 houses four liquefied gas tanks 105. However, the number of liquefied gas tanks 105 housed in the cargo area 102 is not limited. The liquefied gas tanks 105 store liquefied gases such as liquefied hydrogen, liquefied natural gas (LNG), and liquefied petroleum gas (LPG). In addition, a dome 106 is located at the top of the liquefied gas tanks 105, which houses various equipment and piping connected to the inside of the liquefied gas tanks 105.
[0012] Furthermore, as shown in Figure 2, internal passages 108 are located at both ends of the cargo area 102 in the width direction. The internal passages 108 are passages that pass through the inside of the ship and extend in the longitudinal direction from the bow area 103 to the stern area 104. In addition, manifolds 109 are located on the upper deck 107 at both ends of the cargo area 102 in the width direction. The manifolds 109 are the parts that connect to external equipment for handling liquefied gas and are located near the center of the cargo area 102 in the longitudinal direction.
[0013] The bow area 103 is located forward of the cargo area 102. The bow area 103 contains the bow superstructure 111, which includes the portion above the upper deck 107. The bow superstructure 111 may include, for example, living quarters where the crew works and lives. Lifeboats 112 are located on both sides of the bow superstructure 111 in the width direction. The section connecting the escape exit of the bow superstructure 111 to the lifeboats 112 is used as a meeting place 113 where the crew gathers in the event of an evacuation.
[0014] The stern area 104 is located aft of the cargo area 102. The engine room 121 is located in the stern area 104. As shown in Figure 1, the engine room 121 includes a lower engine room 122 located below the upper deck 107 and an upper engine room 123 located above the upper deck 107. Furthermore, the cargo equipment room 124 is located above the upper deck 107 in the stern area 104 and forward of the upper engine room 123 of the engine room 121. The cargo equipment room 124 is where cargo compressors, cargo pumps, or cargo process units (including those that supply gas fuel to the engine room) are located. The underside of the cargo equipment room 124 is located above the upper deck 107, and a gap is formed between the underside of the cargo equipment room 124 and the upper deck 107. Furthermore, the arrangement of the cargo equipment room 124 is not limited to the above, and if the living quarters are located in the stern area 104, the cargo equipment room 124 may be located in the cargo area 102 (for example, between the third liquefied gas tank 105 from the front and the fourth liquefied gas tank 105 from the front).
[0015] <Fire extinguishing equipment> Next, the fire extinguishing system 100 according to this embodiment will be described. As shown in Figure 1, the fire extinguishing system 100 according to this embodiment includes a water spray piping 10, an external fire extinguishing piping 20, an internal fire extinguishing piping 30, and a plurality of pumps 41 to 43. These components will be described in order below.
[0016] The water spray piping 10 is a pipe through which water used in the event of a fire flows, which is sprayed onto the protected object or the area around the fire source. In this embodiment, the water spray piping 10 has water spray nozzles and can spray water onto the protected object. The water spray piping 10 passes through the cargo area 102 and extends from the stern area 104 to the bow area 103.
[0017] The water spray piping 10 includes a cargo equipment room spray line 11, a dome spray line 12, a manifold spray line 13, an internal passage spray line 14, a bow structure spray line 15, and an evacuation area spray line 16.
[0018] The cargo equipment room spray line 11 extends along the top, bottom, and front of the cargo equipment room 124 and can spray water onto the top, bottom, front, and sides of the cargo equipment room 124. The dome spray line 12 extends forward from the cargo equipment room spray line 11 over the dome 106 and can spray water onto the dome 106. The manifold spray line 13 branches off from the dome spray line 12 and extends in the width direction, as shown in Figure 2, and can spray water onto the manifold 109. The internal passage spray line 14 extends forward and aft from the manifold spray line 13 and can spray water onto the portion of the upper deck 107 corresponding to the internal passage 108. The bow structure spray line 15 is connected to the dome spray line 12 and extends along the rear of the bow structure 111 and can spray water onto the rear of the bow structure 111. The evacuation area spray line 16 branches off from the bow structure spray line 15 and can spray water onto the lifeboats 112 and the assembly area 113.
[0019] However, each line 11-16 of the water spray pipe 10 is not limited to the above configuration. For example, the dome spray line 12 may be located beside the dome 106, and water may be sprayed onto the dome 106 through a branch pipe extending from the dome spray line 12 towards each dome 106. Also, for example, the internal passage upper spray line 14 may branch off from the water spray pipe 10 near the cargo equipment room 124. Further, the water spray pipe 10 may not include some of the lines 11-16.
[0020] The external fire-fighting pipe 20 is a pipe through which water supplied to the external fire hydrant during a fire, that is, the water used during a fire, flows. The external fire-fighting pipe 20 passes through the cargo area 102 and extends from the stern area 104 to the bow area 103. The external fire-fighting pipe 20 includes a stern fire-fighting line 21 located in the stern area 104, a cargo fire-fighting line 22 located in the cargo area 102, and a bow fire-fighting line 23 located in the bow area 103.
[0021] The internal fire-fighting pipe 30 is a pipe through which water supplied to the internal fire hydrant during a fire, that is, the water used during a fire, flows. Note that the internal fire-fighting pipe 30 may be configured to connect to the external fire hydrant during a fire and supply water to the external fire hydrant. The internal fire-fighting pipe 30 is located inside the ship and passes through the cargo area 102 and extends from the stern area 104 to the bow area 103. The internal fire-fighting pipe 30 of the present embodiment passes through the internal passage 108. However, the internal fire-fighting pipe 30 may pass outside the internal passage 108.
[0022] The internal fire-fighting pipe 30 includes a water spray pipe front supply port 31, an external fire-fighting pipe front supply port 32, a water spray pipe rear supply port 33, an external fire-fighting pipe rear supply port 34, and an intermediate line 35.
[0023] The forward supply port 31 of the water spray pipe is connected to the bow structure spray line 15 of the water spray pipe 10. The forward supply port 32 of the external fire extinguishing pipe is connected to the bow fire extinguishing line 23 of the external fire extinguishing pipe 20. The rearward supply port 33 of the water spray pipe is connected to the cargo equipment room spray line 11 of the water spray pipe 10. The rearward supply port 34 of the external fire extinguishing pipe is connected to the stern fire extinguishing line 21 of the external fire extinguishing pipe 20. The intermediate line 35 passes through the ship's interior, connecting the forward supply port 31 and the rearward supply port 33 of the water spray pipe, and also connecting the forward supply port 32 and the rearward supply port 34 of the external fire extinguishing pipe. In FIG. 1, the rearward supply port 33 of the water spray pipe is located in front of the cargo equipment room 124, but it may also be located behind the cargo equipment room 124.
[0024] The plurality of pumps 41 to 43 provided in the fire extinguishing equipment 100 include a stern water spray pump 41, a stern fire extinguishing pump 42, and a bow fire extinguishing pump 43. However, the fire extinguishing equipment 100 may be provided with pumps other than these.
[0025] The stern water spray pump 41 is located in the stern area 104. The stern water spray pump 41 is connected to the cargo equipment room spray line 11 of the water spray pipe 10, and can supply water into the water spray pipe 10 from a portion behind the cargo area 102 of the water spray pipe 10. Also, the stern water spray pump 41 can supply water into the ship's interior fire extinguishing pipe 30 via the rearward supply port 33 of the water spray pipe. Thereby, the stern water spray pump 41 can supply water into the external fire extinguishing pipe 20 from a portion behind the cargo area 102 of the external fire extinguishing pipe 20 via the rearward supply port 34 of the external fire extinguishing pipe, can supply water into the water spray pipe 10 from a portion in front of the cargo area 102 of the water spray pipe 10 via the forward supply port 31 of the water spray pipe, and can supply water into the external fire extinguishing pipe 20 from a portion in front of the cargo area 102 of the external fire extinguishing pipe 20 via the forward supply port 32 of the external fire extinguishing pipe.
[0026] The stern fire pump 42 is located in the stern area 104. The stern fire pump 42 is connected to the internal fire extinguishing piping 30 and supplies water into the internal fire extinguishing piping 30. Therefore, the stern fire pump 42 can supply water into the external fire extinguishing piping 20 from the portion of the external fire extinguishing piping 20 aft of the cargo area 102 via the aft supply port 34 of the external fire extinguishing piping, can supply water into the water spray piping 10 from the portion of the water spray piping 10 aft of the cargo area 102 via the aft supply port 33 of the water spray piping, can supply water into the water spray piping 10 from the portion of the water spray piping 10 forward of the cargo area 102 via the forward supply port 31 of the water spray piping, and can supply water into the external fire extinguishing piping 20 from the portion of the external fire extinguishing piping 20 forward of the cargo area 102 via the forward supply port 32 of the external fire extinguishing piping.
[0027] The bow fire pump 43 is located in the bow area 103. The bow fire pump 43 is connected to the internal fire extinguishing piping 30 and supplies water into the internal fire extinguishing piping 30. Therefore, the bow fire pump 43 can supply water into the external fire extinguishing piping 20 from the portion of the external fire extinguishing piping 20 forward of the cargo area 102 via the forward supply port 32 of the external fire extinguishing piping, can supply water into the water spray piping 10 from the portion of the water spray piping 10 forward of the cargo area 102 via the forward supply port 31 of the water spray piping, can supply water into the external fire extinguishing piping 20 from the portion of the external fire extinguishing piping 20 aft of the cargo area 102 via the aft supply port 34 of the external fire extinguishing piping 20, and can supply water into the water spray piping 10 from the portion of the water spray piping 10 aft of the cargo area 102 via the aft supply port 33 of the water spray piping. In addition, the bow area 103 may also contain a pump that supplies water into the water spray piping 10, either in addition to the bow fire pump 43 or in place of the bow fire pump 43.
[0028] As described above, the fire extinguishing system 100 according to this embodiment allows water to be supplied into the water spray pipe 10 not only from the portion of the water spray pipe 10 behind the cargo area 102, but also from the portion of the water spray pipe 10 in front of the cargo area 102. As a result, even if a fire breaks out in the cargo area 102 and a part of the water spray pipe 10 is damaged, the water spray pipe 10 can continue to spray water onto the protected object, and fire extinguishing activities can continue.
[0029] Similarly, according to the fire extinguishing system 100 of this embodiment, water can be supplied into the external fire extinguishing pipe 20 not only from the portion of the external fire extinguishing pipe 20 aft of the cargo area 102, but also from the portion of the external fire extinguishing pipe 20 forward of the cargo area 102. As a result, even if a fire breaks out in the cargo area 102 and a portion of the external fire extinguishing pipe 20 is damaged, the external fire extinguishing pipe 20 can continue to supply water to each fire hydrant, and firefighting activities can continue.
[0030] <Summary> The first item disclosed herein is a fire extinguishing system for a liquefied gas carrier, comprising: a first pipe through a cargo area housing a liquefied gas tank, extending from a stern area behind the cargo area to a bow area ahead of the cargo area, through which water for use in the event of a fire flows; and a second pipe including a forward supply port that can supply water into the first pipe from the portion of the first pipe forward of the cargo area.
[0031] For example, the "water spray piping 10" or "external fire extinguishing piping 20" in the above embodiment corresponds to the "first piping" in the first item, the "water spray piping forward supply port 31" or "external fire extinguishing piping forward supply port 32" in the above embodiment corresponds to the "forward supply port" in the first item, and the "internal fire extinguishing piping 30" in the above embodiment corresponds to the "second piping" in the first item. According to the configuration of the first item, water can be supplied into the first piping from the portion of the first piping forward of the cargo area, so that firefighting activities can continue even if a part of the first piping is damaged by a fire in the cargo area.
[0032] A second item disclosed herein is a fire extinguishing system for a liquefied gas carrier as described in the first item, comprising a first pump that supplies water into the first piping from a portion of the first piping aft of the cargo area.
[0033] For example, if the "water spray piping 10" in the above embodiment corresponds to the "first piping," then the "stern water spray pump 41" in the above embodiment corresponds to the "first pump" in the second item. Also, for example, if the "external fire extinguishing piping 20" in the above embodiment corresponds to the "first piping," then the "stern fire extinguishing pump 42" in the above embodiment corresponds to the "first pump" in the second item. According to the configuration in the second item, the first pump can supply water into the first piping from the portion of the first piping aft of the cargo area.
[0034] A third item disclosed herein is a fire extinguishing system for a liquefied gas carrier as described in item 2, wherein the second piping includes a rear supply port capable of supplying water into the first piping from a portion of the first piping aft of the cargo area, and an intermediate line passing through the ship and connecting the forward supply port and the rear supply port.
[0035] For example, if the "water spray piping 10" in the above embodiment corresponds to the "first piping" in the second item, then the "water spray piping front supply port 31" and the "water spray piping rear supply port 33" in the above embodiment correspond to the "front supply port" and the "rear supply port" in the third item, respectively. Also, for example, if the "outboard fire extinguishing piping 20" in the above embodiment corresponds to the "first piping" in the second item, then the "outboard fire extinguishing piping front supply port 32" and the "outboard fire extinguishing piping rear supply port 34" in the above embodiment correspond to the "front supply port" and the "rear supply port" in the third item, respectively. According to the configuration of the third item, even if the first pump is damaged, water can be supplied into the first piping from the portion of the first piping behind the cargo area via the rear supply port.
[0036] A fourth item disclosed herein is a fire extinguishing system for a liquefied gas carrier as described in item third, comprising a second pump located in the bow area and supplying water into the second piping.
[0037] For example, the "bow fire pump 43" in the above embodiment corresponds to the "second pump" in item 4. According to the configuration in item 4, even if the first pump is damaged, water can be supplied from the second pump to the first and second pipes.
[0038] A fifth item disclosed herein is a fire extinguishing system for a liquefied gas carrier as described in item third, which is located in the stern area and comprises a second pump for supplying water into the second piping.
[0039] For example, the "stern fire pump 42" in the above embodiment corresponds to the "second pump" in item 5. According to the configuration in item 5, even if the first pump is damaged, water can be supplied from the second pump to the first and second pipes.
[0040] The sixth item disclosed herein is a fire extinguishing system for a liquefied gas carrier according to any one of the first to fifth items, wherein the first piping includes a dome spray line for spraying water onto a dome located at the top of the liquefied gas tank.
[0041] According to the configuration of item 6, the area around the dome of the liquefied gas tank can be protected in the event of a fire.
[0042] The seventh item disclosed herein is a fire extinguishing system for a liquefied gas carrier as described in any one of the first to sixth items, wherein the first piping includes a bow structure spray line for spraying water onto the outer wall of a bow structure located in the bow area.
[0043] According to the configuration of item 7, the area near the bow structure can be protected in the event of a fire.
[0044] The eighth item disclosed herein is a fire extinguishing system for a liquefied gas carrier as described in any one of the first to seventh items, wherein the first piping includes an evacuation area spray line for spraying water onto lifeboats and mobilization areas located in the bow area.
[0045] According to the structure of item 8, it is possible to protect the area around the lifeboats and assembly points in the event of a fire. [Explanation of Symbols]
[0046] 10 Water spray piping 11. Cargo equipment room spray line 12 Dome spray lines 13 Manifold spray line 14. Spray line on internal passageway 15. Bow structure spray line 20. External fire extinguishing piping 21 Stern firefighting line 22 Cargo firefighting line 23 Bow firefighting line 30. Onboard fire extinguishing piping 31 Water spray pipe front supply port 32 External fire extinguishing piping forward supply port 33 Water spray pipe rear supply port 34. Rear supply port for external fire extinguishing piping 35 Midline 41. Stern water spray pump 42. Stern fire pump 43 Bow fire pump 100 Fire extinguishing equipment 101 Liquefied Gas Carrier 102 Cargo Area 103 Bow Area 104 Stern Area 105 Liquefied gas tank 106 Domes 111 Bow structure 112 Lifeboats 113 Meeting Place
Claims
1. A first pipe, through the cargo area housing the liquefied gas tank, extends from the stern area behind the cargo area to the bow area ahead of the cargo area, carrying water used in the event of a fire. The system includes a second pipe that includes a forward supply port capable of supplying water into the first pipe from the portion of the first pipe forward of the cargo area, The fire extinguishing system for a liquefied gas carrier comprises a second piping system including a rear supply port capable of supplying water into the first piping from a portion of the first piping behind the cargo area, and an intermediate line that passes through the ship and connects the front supply port and the rear supply port.
2. The fire extinguishing system for a liquefied gas carrier according to claim 1, further comprising a first pump that supplies water into the first piping from a portion of the first piping behind the cargo area.
3. The fire extinguishing system for a liquefied gas carrier according to claim 1, comprising a second pump located in the bow area and supplying water into the second piping.
4. The fire extinguishing system for a liquefied gas carrier according to claim 1, comprising a second pump located in the stern area and supplying water into the second pipe.
5. The fire extinguishing system for a liquefied gas carrier according to claim 1, wherein the first piping includes a dome spray line for spraying water onto a dome located at the top of the liquefied gas tank.
6. The fire extinguishing system for a liquefied gas carrier according to claim 1, wherein the first piping includes a bow structure spray line for spraying water onto the outer wall of the bow structure located in the bow area.
7. The fire extinguishing system for a liquefied gas carrier according to claim 1, wherein the first piping includes an evacuation area spray line for spraying water onto lifeboats and assembly areas located in the bow area.