Fire-fighting bomb cabin and aircraft

Abstract

The invention discloses a fire-fighting bomb cabin and an aircraft, and belongs to the technical field of aircrafts.The fire-fighting bomb cabin comprises a plurality of cabin bodies, each cabin body of the fire-fighting bomb cabin is provided with a first ring beam and a second ring beam which are parallel to each other, the two ends of a supporting plate are in lap joint with the inner side of the first ring beam and the inner side of the second ring beam respectively, and the first ring beam and the second ring beam are used for supporting the cabin bodies; the supporting plates are used for supporting the fire extinguishing bombs, every two adjacent cabins are connected through the connecting tongues and the connecting grooves which are connected in an inserted mode, the connecting tongues and the connecting grooves are formed in the first ring beams and / or the second ring beams, modular splicing of the multiple cabins is achieved, different numbers of cabins are matched according to different fire behaviors, and the fire extinguishing efficiency of the fire-fighting aircraft is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft, and in particular to a fire-fighting bomb cabin and an aircraft. Background Art

[0002] The application of firefighting drones has brought great convenience to firefighting work. Firefighting drones can fly over the fire scene and drop firefighting bombs by carrying fire-extinguishing bomb pods, thereby achieving efficient firefighting operations. However, the existing firefighting drone firefighting bomb pods have a relatively limited loading capacity of firefighting bombs. When faced with more serious fires, the number of firefighting bombs carried at a time is difficult to meet the needs of large-scale firefighting. In this case, the only way to supplement the amount of firefighting bombs dropped is to increase the flight frequency of firefighting drones. However, frequently increasing the number of flights will not only consume a lot of time and energy and reduce the efficiency of firefighting, but may also increase the risk of equipment failure due to the long-term and high-intensity work of drones, affecting the smooth progress of the entire firefighting operation. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a fire bomb pod and an aircraft to solve the problem that the current fire bomb pod cannot adapt to various fire conditions.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A firefighting bomb cabin comprises a plurality of cabins;

[0006] The cabin body comprises a support plate and a first ring beam and a second ring beam which are parallel to each other, and two ends of the support plate are overlapped on the inner side of the first ring beam and the inner side of the second ring beam respectively;

[0007] One of the two adjacent cabins is provided with a connecting tongue, and the other is provided with a connecting groove, and the connecting tongue and the connecting groove are plug-connected;

[0008] The connecting tongue is arranged on the first ring beam and / or the second ring beam, and the connecting groove is arranged on the first ring beam and / or the second ring beam.

[0009] Preferably, the cabin body includes a plurality of partition plates, the partition plates and the support plates are arranged perpendicular to each other and abut against each other, the two ends of the partition plates are respectively connected to the inner side of the first ring beam and the inner side of the second ring beam; and a bullet storage slide is provided between two adjacent partition plates.

[0010] Preferably, the cabin body includes two longitudinal beams parallel to each other, the longitudinal beams and the first ring beam are arranged perpendicular to each other, the two longitudinal beams are respectively located on both sides of the first ring beam, and the two ends of the longitudinal beam are respectively connected to the first ring beam and the second ring beam.

[0011] Preferably, the cabin includes two connecting beams, the connecting beams are arranged parallel to the first ring beam, and the connecting beams are located between the first ring beam and the second ring beam; each connecting beam corresponds to one longitudinal beam, one end of the connecting beam is connected to the longitudinal beam, and the other end of the connecting beam is connected to the support plate.

[0012] Preferably, the cabin body comprises a plurality of support columns, the support columns are located on the inner side of the first ring beam and / or the second ring beam, and the two ends of the support columns are respectively connected to two inner wall surfaces oppositely arranged in the first ring beam and / or the second ring beam;

[0013] The support columns are arranged along the arrangement direction of the plurality of cabins.

[0014] Preferably, the connecting beam of one of the two adjacent cabins is provided with a protruding structure, and the connecting beam of the other cabin is provided with a recessed structure, and the protruding structure is embedded in the recessed structure.

[0015] Preferably, a bullet-casting hole is provided in the middle of the support plate, and two adjacent cabins are connected through the bullet-casting hole;

[0016] The bomb throwing hole of the cabin body located at the bottom is provided with a cylindrical net bag.

[0017] Preferably, a bullet passing channel is provided in the middle of the partition plate, and the bullet storage slides are provided on both sides of the bullet passing channel; a bomb throwing device for blocking or releasing the fire extinguishing bomb is provided between the bullet storage slides and the bullet passing channel.

[0018] Preferably, the cabin body includes an outer shell, the partition plate, the first ring beam and the second ring beam are all located inside the outer shell, the outer shell is provided with an opening arranged opposite to the ammunition storage slide, and the opening is provided with a door body rotatably connected to the outer shell.

[0019] Preferably, the shell is provided with an observation window, the observation window is arranged adjacent to the opening, and the observation window is arranged opposite to the ammunition storage slide.

[0020] In order to solve the same technical problem, the present invention also provides an aircraft, comprising the firefighting bomb bay as described above.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The cabin of the fire bomb cabin has a first ring beam and a second ring beam which are parallel to each other. The two ends of the support plate are respectively overlapped on the inner side of the first ring beam and the inner side of the second ring beam. The first ring beam and the second ring beam are used to provide support for the cabin, and the support plate is used to support the fire bomb. Two adjacent cabins are connected by a connecting tongue and a connecting groove which are plug-in connected. The connecting tongue and the connecting groove are arranged on the first ring beam and / or the second ring beam, thereby realizing modular splicing of multiple cabins. Different numbers of cabins are matched according to different fire conditions, thereby improving the fire-fighting efficiency of the fire-fighting aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 One of the overall structural schematic diagrams of the fire bomb cabin of the invention;

[0024] Figure 2 The second schematic diagram of the overall structure of the fire-fighting bomb compartment of the invention;

[0025] Figure 3 One of the schematic diagrams of the internal structure of the fire-fighting bomb cabin of the invention;

[0026] Figure 4 The second schematic diagram of the internal structure of the fire-fighting bomb cabin of the invention;

[0027] Figure 5 The third schematic diagram of the internal structure of the fire-fighting bomb cabin of the invention;

[0028] Figure 6 One of the schematic diagrams of the skeleton structure of the fire-fighting bomb cabin of the invention;

[0029] Figure 7 The fourth schematic diagram of the internal structure of the fire-fighting bomb cabin of the invention;

[0030] Figure 8 The second schematic diagram of the skeleton structure of the fire-fighting bomb cabin of the invention;

[0031] Fig. 9 for Figure 3 The enlarged schematic diagram of point A in the middle;

[0032] Fig.10 for Figure 7 The enlarged schematic diagram of point B in the middle;

[0033] Fig.11 for Figure 1 The enlarged schematic diagram of the center C;

[0034] In the figure: 10, cabin; 11, connecting tongue; 12, connecting groove; 13, partition plate; 13a, ammunition storage slide; 13b, ammunition passage; 14, bomb delivery device; 15, outer shell; 16, door body; 17, observation window; 20, first ring beam; 30, second ring beam; 40, support plate; 41, bomb delivery hole; 42, net bag; 50, longitudinal beam; 60, connecting beam; 61, raised structure; 62, recessed structure; 70, support column. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] Example 1

[0039] Combination Figures 1 to 11 As shown, the fire-fighting bomb cabin of the present invention is schematically shown, which includes a plurality of cabins 10, and each cabin 10 can be loaded with existing fire-extinguishing bombs.

[0040] Among them, combined Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, the cabin 10 includes a support plate 40 and a first ring beam 20 and a second ring beam 30 which are parallel to each other. Both ends of the support plate 40 are overlapped on the inner side of the first ring beam 20 and the inner side of the second ring beam 30 respectively. The support plate 40 is used to support multiple fire extinguishing bombs. The first ring beam 20 and the second ring beam 30 can be used not only to support the support plate 40, but also to support the entire cabin 10, so that the cabin 10 maintains its external structure. Other force transmission components or load-bearing components in the cabin 10 can be connected to the first ring beam 20 and / or the second ring beam 30.

[0041] Combination Figure 3 , Figure 7 , Fig. 9 and Fig.10 As shown, one of the two adjacent cabins 10 is provided with a connecting tongue 11, and the other is provided with a connecting groove 12. The connecting tongue 11 and the connecting groove 12 are plugged and connected, thereby quickly connecting the two adjacent cabins 10. At the same time, the setting of the connecting tongue 11 and the connecting groove 12 can also prevent the two adjacent cabins 10 from abnormally misaligned, so as to facilitate quick positioning and connection. The connecting tongue 11 is provided on the first ring beam 20 and / or the second ring beam 30, and the connecting groove 12 is provided on the first ring beam 20 and / or the second ring beam 30. Therefore, the two adjacent cabins 10 can transmit force through the connecting tongue 11 and the connecting groove 12, and act on the first ring beam 20 or the second ring beam 30 of each cabin 10. The first ring beam 20 and the second ring beam 30 are load-bearing structures that can transmit force between each cabin 10.

[0042] In particular, when there are two cabins 10, the two cabins 10 are stacked up and down, the top of the cabin 10 located at the top is connected to the fuselage of the aircraft, and the bottom of the cabin 10 located at the bottom is connected to the landing gear of the aircraft. More specifically, the top of the first ring beam 20 and the second ring beam 30 of the cabin 10 located at the top is connected to the fuselage through existing bolts or similar connecting parts, and the bottom of the first ring beam 20 and the second ring beam 30 of the cabin 10 located at the bottom is connected to the landing gear through existing bolts, buckles and other connecting parts. When the aircraft is placed on the ground, the weight of the aircraft itself and the weight of the cabin 10 are transferred to the bottom landing gear by the first ring beam 20 and the second ring beam 30 of the cabin 10. In other words, the first ring beam 20 and the second ring beam 30 of the cabin 10 are not only used to maintain the shape of the cabin 10, but also need to support the aircraft above.

[0043] A plurality of cabins 10 can be connected and combined with each other, which can not only be assembled in a modular manner to adapt to different fire conditions, but also facilitate the disassembly and maintenance of the cabins 10. For example, when there are two cabins 10, after separating the upper and lower cabins 10, the interiors of the two cabins 10 can be repaired and maintained respectively. In the prior art, the existing cabins 10 are all of an integrated structure, and their shells are difficult to disassemble, resulting in low maintenance efficiency. In addition, various sensors and / or control boxes are also provided in the cabin 10. Maintenance personnel cannot observe the indicator lights on the sensors and / or control boxes through the existing cabin 10, and it is difficult to inspect the electrical equipment in the cabin. A transparent observation window 17 is provided on the cabin 10 of the fire bomb cabin, so that maintenance personnel can observe the indicator lights on the sensors and / or control boxes through the observation window 17.

[0044] Furthermore, if Figure 6 and Figure 8 The cabin 10 includes two longitudinal beams 50 and two connecting beams 60 which are parallel to each other. The longitudinal beam 50 and the first ring beam 20 are arranged perpendicular to each other. Of course, the longitudinal beam 50 and the second ring beam 30 are also arranged perpendicular to each other. The two longitudinal beams 50 are respectively located on both sides of the first ring beam 20 (the second ring beam 30), and the two ends of the longitudinal beam 50 are respectively connected to the first ring beam 20 and the second ring beam 30. The longitudinal beam 50 is used to connect the first ring beam 20 and the second ring beam 30. The longitudinal beam 50, the first ring beam 20 and the second ring beam 30 together constitute the skeleton of the cabin 10. The longitudinal beam 50 can also improve the torsional performance of the cabin 10 to prevent the first ring beam 20 and the second ring beam 30 from twisting relative to each other.

[0045] In some optional embodiments, the connecting beam 60 and the first ring beam 20 are arranged parallel to each other, and the connecting beam 60 is located between the first ring beam 20 and the second ring beam 30. Each connecting beam 60 corresponds to a longitudinal beam 50, one end of the connecting beam 60 is connected to the longitudinal beam 50, and the other end of the connecting beam 60 is connected to the support plate 40. The connecting beam 60, the longitudinal beam 50, the first ring beam 20 and the second ring beam 30 together constitute the skeleton of the cabin 10. The connecting beam 60 can connect the support plate 40 with the longitudinal beam 50, so that the support plate 40 can support more or heavier fire extinguishing bombs. In other optional embodiments, such as Figure 6 and Figure 8Alternatively, the cabin 10 may have four mutually parallel longitudinal beams 50, wherein two longitudinal beams 50 are arranged on one side of the first ring beam 20, and the other two longitudinal beams 50 are arranged on the other side of the first ring beam 20, and the two ends of the connecting beam 60 are respectively connected to the two longitudinal beams 50 on one side of the first ring beam 20. In this case, the setting of the connecting beam 60 can improve the stability of the two longitudinal beams 50, thereby improving the rigidity of the cabin 10 skeleton. Among them, the connecting beam 60 of one of the two adjacent cabins 10 is provided with a protruding structure 61, and the connecting beam 60 of the other one is provided with a recessed structure 62, and the protruding structure 61 is embedded in the recessed structure 62. For example, when the two cabins 10 are stacked up and down, the protruding structure 61 of the connecting beam 60 of the upper cabin 10 is embedded in the recessed structure 62 of the connecting beam 60 of the lower cabin 10. The protruding structure 61 and the recessed structure 62 can prevent the connecting beam 60 of the two cabins 10 stacked up and down from being misaligned. At the same time, the connecting beam 60 of the two cabins 10 stacked up and down can be detachably connected by existing bolts and other connecting parts.

[0046] Combination Figure 6 and Figure 8 As shown, in order to improve the load-bearing performance of each cabin 10 when multiple cabins 10 are stacked and connected up and down, the cabin 10 includes a plurality of support columns 70, and the support columns 70 are located on the inner side of the first ring beam 20 and / or the second ring beam 30, and the two ends of the support columns 70 are respectively connected to two relatively arranged inner wall surfaces in the first ring beam 20 and / or the second ring beam 30, and the support columns 70 are arranged along the arrangement direction of the multiple cabins 10. In the present embodiment, each cabin 10 is provided with four support columns 70, two of which are located on the inner side of the first ring beam 20, and the other two are located on the inner side of the second ring beam 30. Taking the first ring beam 20 as an example (the second ring beam 30 is similar), the ends of the support columns 70 are connected to the inner wall surface of the first ring beam 20, and the support columns 70 can prevent the first ring beam 20 from collapsing inwardly. When multiple cabins 10 are stacked and connected up and down, the support columns 70 of the upper cabin 10 are aligned with the support columns 70 of the lower cabin 10, and the support columns 70 can transmit the force of the upper and lower cabins 10 to reduce the load on the first ring beam 20 or the second ring beam 30 and improve the load-bearing performance of the entire cabin 10.

[0047] Example 2

[0048] Combination Figure 4 , Figure 5 and Figure 7As shown, the difference between this embodiment and the first embodiment is that the cabin 10 includes an outer shell 15 and a plurality of partitions 13, and the partitions 13 and the support plate 40 are arranged perpendicular to each other and abut against each other. In this embodiment, the bottom of the partition 13 is connected to the support plate 40 by Velcro, so that the two can be separated more easily, so as to facilitate the maintenance or replacement of the partition 13. The two ends of the partition 13 are respectively connected to the inner side of the first ring beam 20 and the inner side of the second ring beam 30, and there is a bullet storage slide 13a between two adjacent partitions 13. The gravity of the partition 13 itself can be transmitted to the first ring beam 20 and the second ring beam 30, and the partition 13 is supported by the first ring beam 20 and the second ring beam 30. A plurality of fire extinguishing bombs can be stored in the bullet storage slide 13a, and a bullet throwing hole 41 is opened in the middle of the support plate 40. The middle part of the support plate 40 is lower, and the two sides of the support plate 40 are higher, so that the fire extinguishing bomb can slide down to the bullet throwing hole 41 in the middle of the support plate 40 by itself under the action of gravity to achieve bomb throwing. In the prior art, the fire extinguishing bomb is suspended in the cabin 10. The vibration generated when the aircraft is flying will cause the fire extinguishing bomb to shake in the cabin 10, affecting the flight stability, and even easily bumping and damaging the fire extinguishing bomb. The arrangement of the bullet storage slide 13a allows the fire extinguishing bomb to slide only in the bullet storage slide 13a. The bullet storage slide 13a limits the freedom of the fire extinguishing bomb. When the bullet storage slide 13a is full of fire extinguishing bombs, each fire extinguishing bomb will not shake or bump due to flight turbulence, so that the aircraft can fly stably.

[0049] When multiple cabins 10 are stacked up and down, two adjacent cabins 10 are connected through the bullet holes 41, and the fire extinguishing bomb in the upper cabin 10 can fall into the lower cabin 10 through the bullet holes 41 of the cabin 10, and be released to the outside world through the bullet holes 41 of the lower cabin 10. The bullet holes 41 of the lower cabin 10 are provided with a cylindrical net bag 42, and the setting of the net bag 42 can correct the posture of the fire extinguishing bomb rolling down to the bullet hole 41, so as to reduce the kinetic energy accumulated by the fire extinguishing bomb when sliding down the bullet storage slide 13a, thereby reducing the deviation of the fire extinguishing bomb when falling from the bullet hole 41, and improving the bullet dropping accuracy.

[0050] Further, the partition plate 13, the first ring beam 20 and the second ring beam 30 are all located in the shell 15, and the shell 15 is provided with an opening arranged opposite to the bullet storage slide 13a, and the opening is provided with a door body 16 rotatably connected to the shell 15, and the maintenance personnel can open the door body 16 and replenish the fire extinguishing bombs into the cabin 10 through the opening. A bullet passage 13b is provided in the middle of the partition plate 13, and the two sides of the bullet passage 13b are provided with bullet storage slides 13a, and the bullet passage 13b and the bullet storage slide 13a are arranged vertically. A bomb throwing device 14 for blocking or releasing the fire extinguishing bomb is provided between the bullet storage slide 13a and the bullet passage 13b, and the bomb throwing device 14 can move to block or release the fire extinguishing bomb. When the bomb throwing device 14 releases the fire extinguishing bomb, the fire extinguishing bomb slides down the bullet storage slide 13a to the bullet passage 13b under the action of gravity, and slides down from the bullet passage 13b to the bomb throwing hole 41.

[0051] An observation window 17 is provided on the outer shell 15. The shape of the observation window 17 is preferably rectangular, and the observation window 17 is arranged adjacent to the door body 16 (the opening of the outer shell 15). There can be multiple observation windows 17. Each observation window 17 corresponds to a bullet storage chute 13a and the two are arranged opposite to each other, so that maintenance personnel can observe the indicator lights on the electrical equipment in the bullet storage chute 13a through the observation window 17 (the electrical equipment can be a control box arranged in the cabin 10, can be a bullet storage sensor for detecting the number of fire extinguishing bombs, or can be a bomb delivery device 14).

[0052] Example 3

[0053] The present embodiment discloses an aircraft, including a fuselage, a landing gear, and a fire bomb bay as described above, wherein the fire bomb bay has a plurality of cabin bodies 10, and the plurality of cabin bodies 10 are stacked and connected up and down, wherein the cabin body 10 located at the top is connected to the fuselage via its first ring beam 20 and second ring beam 30, and the cabin body 10 located at the bottom is connected to the landing gear via its first ring beam 20 and second ring beam 30.

[0054] To summarize, the cabin 10 of the fire bomb cabin has a first ring beam 20 and a second ring beam 30 which are parallel to each other. The two ends of the support plate 40 are respectively overlapped on the inner side of the first ring beam 20 and the inner side of the second ring beam 30. The first ring beam 20 and the second ring beam 30 are used to provide support for the cabin 10, and the support plate 40 is used to support the fire extinguishing bomb. Two adjacent cabins 10 are connected by a plug-in connecting tongue 11 and a connecting groove 12. The connecting tongue 11 and the connecting groove 12 are arranged on the first ring beam 20 and / or the second ring beam 30, thereby realizing modular splicing of multiple cabins 10. Different numbers of cabins 10 are matched according to different fire conditions to improve the fire-fighting efficiency of the fire-fighting aircraft.

[0055] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fire-fighting bomb cabin, characterized in that: including a plurality of cabins; The cabin body comprises a support plate and a first ring beam and a second ring beam which are parallel to each other, and two ends of the support plate are overlapped on the inner side of the first ring beam and the inner side of the second ring beam respectively; One of the two adjacent cabins is provided with a connecting tongue, and the other is provided with a connecting groove, and the connecting tongue and the connecting groove are plug-connected; The connecting tongue is arranged on the first ring beam and / or the second ring beam, and the connecting groove is arranged on the first ring beam and / or the second ring beam.

2. The firefighting bomb cabin according to claim 1, characterized in that: The cabin body includes a plurality of partition plates, which are arranged perpendicularly to the support plates and abut against each other, and the two ends of the partition plates are respectively connected to the inner side of the first ring beam and the inner side of the second ring beam; a bullet storage slide is provided between two adjacent partition plates.

3. The firefighting bomb cabin according to claim 1, characterized in that: The cabin body includes two longitudinal beams parallel to each other. The longitudinal beams and the first ring beam are arranged perpendicular to each other. The two longitudinal beams are respectively located on both sides of the first ring beam, and two ends of the longitudinal beam are respectively connected to the first ring beam and the second ring beam.

4. The firefighting bomb cabin according to claim 3, characterized in that: The cabin body includes two connecting beams, which are arranged parallel to the first ring beam and located between the first ring beam and the second ring beam; each connecting beam corresponds to one longitudinal beam, one end of the connecting beam is connected to the longitudinal beam, and the other end of the connecting beam is connected to the support plate.

5. The firefighting bomb cabin according to claim 1, characterized in that: The cabin body includes a plurality of support columns, the support columns are located on the inner side of the first ring beam and / or the second ring beam, and the two ends of the support columns are respectively connected to two inner wall surfaces of the first ring beam and / or the second ring beam that are arranged opposite to each other; The support columns are arranged along the arrangement direction of the plurality of cabins.

6. The firefighting bomb cabin according to claim 4, characterized in that: The connecting beam of one of the two adjacent cabins is provided with a protruding structure, and the connecting beam of the other cabin is provided with a recessed structure, and the protruding structure is embedded in the recessed structure.

7. The firefighting bomb cabin according to claim 1, characterized in that: A bomb hole is provided in the middle of the support plate, and two adjacent cabins are connected through the bomb hole; The bomb throwing hole of the cabin body located at the bottom is provided with a cylindrical net bag.

8. The firefighting bomb cabin according to claim 2, characterized in that: A bullet passing channel is provided in the middle of the partition plate, and the bullet storage slides are provided on both sides of the bullet passing channel; a bomb throwing device for blocking or releasing fire extinguishing bombs is provided between the bullet storage slides and the bullet passing channel.

9. The firefighting bomb cabin according to claim 2, characterized in that: The cabin body includes an outer shell, the partition plate, the first ring beam and the second ring beam are all located in the outer shell, the outer shell is provided with an opening arranged opposite to the ammunition storage slide, and the opening is provided with a door body rotatably connected to the outer shell.

10. The firefighting bomb cabin according to claim 9, characterized in that: The shell is provided with an observation window, the observation window is arranged adjacent to the opening, and the observation window is arranged opposite to the ammunition storage slideway.

11. An aircraft, characterized in that: It comprises a firefighting bomb compartment as described in any one of claims 1 to 9.

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