Fire extinguishing type cabin watertight chamber door and fire extinguishing method based on watertight chamber door

Abstract

The invention discloses a watertight chamber door for a fire extinguishing type cabin and a fire extinguishing method based on the watertight chamber door, and belongs to the technical field of ships. The cabin door assembly comprises a front cabin cover, a rear cabin cover, a lock and fireproof glass; a fireproof heat insulation layer attached to the front hatch cover is further installed between the front hatch cover and the rear hatch cover, a plurality of fire extinguishing holes distributed in the top, the middle and the bottom of the front hatch cover and the fireproof heat insulation layer are formed in the front hatch cover and the fireproof heat insulation layer, and a fire extinguishing balloon which is located between the front hatch cover and the rear hatch cover and filled with flame retardant materials is installed in each fire extinguishing hole. Due to the fact that the fireproof heat insulation layer is installed between the front hatch cover and the rear hatch cover, the fireproof heat insulation layer can play an effective fireproof and heat insulation role. When the fire just spreads to the front of the cabin door assembly, flames can quickly burn out the fire extinguishing balloons at the fire extinguishing holes, and flame-retardant materials in the fire extinguishing balloons can extinguish the fire in front of the cabin door assembly, so that the effects of fire prevention and active fire extinguishing are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a fire-extinguishing watertight door for a cabin and a fire-extinguishing method based on the watertight door. Background Art

[0002] Ship cabins present a high fire risk due to their enclosed spaces and concentration of combustible materials (such as electrical equipment and decorative materials). As core components for fire separation between cabins, watertight doors must meet both watertightness (preventing seawater / river water infiltration) and fire resistance (slowing the spread of fire) requirements.

[0003] Traditional watertight compartment doors are mostly made of metal (such as steel and aluminum alloy). Their heavy structure only blocks heat transfer, but they lack active fire suppression capabilities. When a fire spreads to the hatch surface, traditional doors are unable to proactively intervene, allowing flames to spread through weak points like door gaps and observation windows, potentially expanding the fire's scope and threatening personnel safety and the integrity of the vessel. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide a fire-extinguishing cabin watertight door with fire prevention and active fire extinguishing functions and a fire extinguishing method based on the watertight door.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A fire-extinguishing watertight door for a ship cabin comprises a door frame fixed to a cabin body and a door assembly rotatably mounted on the door frame on the left side via multiple hinges;

[0007] The hatch assembly includes a front hatch cover located at the front side, a rear hatch cover detachably installed behind the front hatch cover, a lock fixedly installed between the front hatch cover and the rear hatch cover, and a visible fireproof glass installed on the rear hatch cover;

[0008] A fireproof and heat-insulating layer is installed between the front hatch and the rear hatch, and a plurality of fire-extinguishing holes are opened on the front hatch and the fireproof and heat-insulating layer, distributed at the top, middle and bottom. A fire-extinguishing balloon filled with flame-retardant material is installed between the front hatch and the rear hatch, and after the fire-extinguishing balloon is burned through the fire-extinguishing hole, the flame-retardant material is sprayed out from the fire-extinguishing hole to extinguish the fire.

[0009] By adopting the above scheme, a fireproof and heat-insulating layer is installed between the front hatch and the rear hatch of this scheme, and the fireproof and heat-insulating layer can play an effective role in fire prevention and heat insulation; when the fire just spreads to the front of the hatch assembly, the flame will quickly burn the fire-extinguishing balloon at the fire-extinguishing hole, and the flame-retardant material in the fire-extinguishing balloon will extinguish the fire in front of the hatch assembly, thereby playing a role in fire prevention and active fire extinguishing.

[0010] As a preferred embodiment of a fire-extinguishing cabin watertight door, a fire-extinguishing balloon is confined and installed in a balloon cage, and a hollow screw sleeve is connected to the center of the balloon cage; part of the fire-extinguishing balloon extends into the hollow screw sleeve, and the entire fire-extinguishing balloon and the ball cage are fixed in the fire-extinguishing hole through the hollow screw sleeve; wherein, the flame retardant material in the fire-extinguishing balloon is composed of high-pressure gas and flame retardant powder.

[0011] By adopting the above solution, in order to facilitate the installation of the fire extinguishing balloon, the fire extinguishing balloon is placed in the balloon cage and fixed in the fire extinguishing hole through the hollow screw sleeve of the balloon cage, thereby facilitating subsequent disassembly and replacement.

[0012] A fire extinguishing method based on a fire extinguishing type cabin watertight door, the method adopts the fire extinguishing type cabin watertight door to prevent and extinguish fire, and the fire prevention and fire extinguishing method is as follows:

[0013] When the fire just spreads to the front of the hatch assembly, the fire-proof and heat-insulating layer installed between the front hatch cover and the rear hatch cover can play an effective fire-proof and heat-insulating role; at this time, the temperature of the front hatch cover rises, and the flames will quickly burn the fire-extinguishing balloon at the fire-extinguishing hole, and then, under the push of high-pressure gas, the flame-retardant powder will be sprayed out from the fire-extinguishing hole, and finally the fire in front of the hatch assembly will be extinguished by the flame-retardant powder.

[0014] The second technical problem to be solved by the present invention is to provide a fire-extinguishing cabin watertight door, which, on the basis of fire prevention and active fire extinguishing, has higher locking strength and is not prone to abnormal noise after long-term use.

[0015] As a preferred embodiment of a fire-extinguishing cabin watertight door, a plurality of movable latches are installed between the front hatch and the rear hatch, and are distributed simultaneously on the top side, the right side and the bottom side of the rear hatch. The surface of each movable latch is also covered with a rubber sleeve. Every two adjacent movable latches are synchronously driven by a connecting rod. All the movable latches can be simultaneously assembled to the door frame under the drive of the connecting rod, thereby strengthening the door structure.

[0016] By adopting the above scheme, this scheme adds multiple movable pins distributed on the top, right and bottom sides of the hatch door on the basis of the traditional method of using only locks to lock the hatch door. All movable pins can be simultaneously assembled on the door frame under the transmission of the connecting rod, so as to strengthen the hatch door structure, thereby making the hatch door stronger after closing. In this way, the hatch door has more fixed points, making it less likely for the hatch door to make abnormal noises when the ship is sailing.

[0017] As a preferred embodiment of a fire-extinguishing cabin watertight door, the movable latch includes a movable latch 1 located in the middle of the right side of the rear hatch cover, a movable latch 2 located at the top of the right side of the rear hatch cover, a movable latch 3 located at the bottom of the right side of the rear hatch cover, a movable latch 4 located in the middle of the top side of the rear hatch cover, and a movable latch 5 located in the middle of the bottom side of the rear hatch cover. Each movable latch is connected to a control socket rotatably mounted on the rear hatch cover.

[0018] By adopting the above solution, in order to increase the fixing points of the hatch assembly, a total of five movable latches are installed on its top, right and bottom sides; there are three movable latches on the right side, and one movable latch each on the top and bottom sides, thereby improving the locking strength of the hatch assembly.

[0019] As a preferred embodiment of a fire-extinguishing cabin watertight door, the control socket includes a control socket 1 fixedly connected to the movable latch 1, a control socket 2 fixedly connected to the movable latch 2, a control socket 3 fixedly connected to the movable latch 3, a control socket 4 fixedly connected to the movable latch 4, and a control socket 5 fixedly connected to the movable latch 5.

[0020] By adopting the above solution, in order to conveniently control the movement of the movable pin, the five movable pins are connected to the control socket one by one, and the movement of the movable pin is achieved by rotating the control pin.

[0021] As a preferred embodiment of a fire-extinguishing cabin watertight chamber door, the connecting rod includes an active connecting rod that simultaneously rotates and connects control socket 1, control socket 2 and control socket 3, a driven connecting rod that simultaneously rotates and connects control socket 2 and control socket 4, and a driven connecting rod that simultaneously rotates and connects control socket 3 and control socket 5.

[0022] By adopting the above solution, in order to facilitate the simultaneous control of the movement of the five movable pins, the active connecting rod is actuated, and under the transmission of the two driven connecting rods, the five movable pins can be simultaneously inserted into the door frame.

[0023] As a preferred embodiment of a fire-extinguishing cabin watertight door, the control socket 1 is further connected to a latch rocker 1 located in front of the front hatch and a latch rocker 2 located behind the rear hatch, and the latch rocker 1 is concentrically connected to the latch rocker 2.

[0024] By adopting the above scheme, in order to facilitate the driving of the active connecting rod to move; at the front hatch, the control socket 1 can be rotated by rotating the latch rocker 1, thereby driving the active connecting rod to move, so that five movable latches can be simultaneously inserted into the door frame; at the rear hatch, the control socket 1 can be rotated by rotating the latch rocker 2, thereby driving the active connecting rod to move, so that five movable latches can be simultaneously inserted into the door frame.

[0025] As a preferred embodiment of a watertight door for a fire-extinguishing cabin, the door frame as a whole protrudes from the front and rear sides of the cabin body, and the door frame can seal and wrap the top, bottom, left and right sides of the door assembly.

[0026] By adopting the above solution, in order to ensure that the hatch assembly has good watertightness, the four sides of the hatch assembly are sealed and wrapped by the entire door frame. The entire hatch assembly is very thick, which can effectively ensure that it has good watertightness.

[0027] The beneficial effects produced by the present invention are:

[0028] 1. A fireproof and heat-insulating layer is installed between the front and rear hatches of this solution. This layer effectively prevents fire and provides heat insulation. When a fire spreads to the front of the hatch assembly, the flames will quickly burn through the fire-extinguishing balloon at the fire-extinguishing hole. The flame-retardant material inside the fire-extinguishing balloon will extinguish the fire in front of the hatch assembly, thus achieving fire prevention and active fire extinguishing effects.

[0029] 2. To facilitate the installation of the fire extinguishing balloon, place the fire extinguishing balloon in the balloon cage and fix it in the fire extinguishing hole through the hollow screw sleeve of the balloon cage, so as to facilitate subsequent disassembly and replacement;

[0030] 3. In addition to the traditional method of locking the hatch door with only a lock, this solution adds five movable latches distributed on the top, right, and bottom sides of the hatch door. All movable latches can be simultaneously assembled to the door frame under the drive of the connecting rod, thereby strengthening the hatch door structure and making the hatch door stronger when closed. This way, the hatch door has more fixing points, making it less likely to make abnormal noises when the ship is sailing;

[0031] 4. In order to ensure that the hatch assembly has good watertightness, the door frame is used to seal all four sides of the hatch assembly. The entire hatch assembly is very thick, which can effectively ensure that it has good watertightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 To face the three-dimensional structure of the fire-extinguishing cabin watertight door when it is closed Figure 1 ;

[0034] Figure 2 The three-dimensional structure of the rear-view fire-extinguishing cabin watertight door when closed Figure 1 ;

[0035] Figure 3 This is a three-dimensional structural diagram of the fire-extinguishing cabin watertight door when it is open;

[0036] Figure 4 for Figure 1 Three-dimensional structure of the middle door assembly Figure 1 ;

[0037] Figure 5 for Figure 1 Three-dimensional structure of the middle door assembly Figure 2 ;

[0038] Figure 6 For display Figure 4 A map showing the location of the firefighting balloons;

[0039] Figure 7 for Figure 6 A three-dimensional diagram of the fire-fighting balloon when installed in the balloon cage;

[0040] Figure 8 For display Figure 7 Structural diagram of the internal structure;

[0041] Figure 9 For display Figure 4 Location distribution diagram of various internal structures;

[0042] Figure 10 For display Figure 5 The location distribution diagram of the five movable latches;

[0043] Markings in the figure: 1-cabin; 2-door frame; 3-hinge; 4-door assembly; 401-front cabin cover; 402-rear cabin cover; 403-lock; 404-fireproof glass; 405-fireproof insulation layer; 406-fire extinguishing hole; 407-fire extinguishing balloon; 408-balloon cage; 409-hollow screw sleeve; 410-flame retardant material; 411-movable latch one; 412-movable latch two; 413-movable latch three; 414-movable latch four; 415-movable latch five; 416-control socket one; 417-control socket two; 418-control socket three; 419-control socket four; 420-control socket five; 421-active connecting rod; 422-driven connecting rod one; 423-driven connecting rod two; 424-latch rocker one; 425-latch rocker two. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] like Figures 1 to 8 As shown, a fire-extinguishing watertight cabin door is provided, which is used in the cabin of a ship, and specifically comprises a door frame 2 fixed to the cabin body 1 and a hatch assembly 4 rotatably mounted on the door frame 2 on the left side through multiple hinges 3; the hatch assembly 4 comprises a front hatch 401 located at the front side, a rear hatch 402 detachably mounted on the rear side of the front hatch 401, a lock 403 fixedly mounted between the front hatch 401 and the rear hatch 402, and a visible fireproof glass 404 mounted on the rear hatch 402, the thickness of which is 8-10 mm; a bonding glass is also installed between the front hatch 401 and the rear hatch 402. The fireproof and heat-insulating layer 405 of the front hatch 401 has a thickness of 12-15 mm, which is specifically rock wool or glass wool, and a plurality of fire-extinguishing holes 406 distributed at the top, middle and bottom of the front hatch 401 and the fireproof and heat-insulating layer 405 are provided. A fire-extinguishing balloon 407 located between the front hatch 401 and the rear hatch 402 and filled with flame-retardant material 410 is installed in each fire-extinguishing hole 406. The fire-extinguishing balloon 407 is made of PVC material, and after the fire-extinguishing balloon 407 is burned through the fire-extinguishing hole 406, the flame-retardant material 410 is sprayed out from the fire-extinguishing hole 406 to extinguish the fire. In this solution, a fireproof and heat-insulating layer 405 is installed between the front hatch 401 and the rear hatch 402. The fireproof and heat-insulating layer 405 can effectively prevent fire and provide heat insulation. When the fire just spreads to the front of the hatch assembly 4, the flame will quickly burn through the fire-extinguishing balloon 407 at the fire-extinguishing hole 406. The flame-retardant material 410 in the fire-extinguishing balloon 407 will extinguish the fire in front of the hatch assembly 4, thereby playing a role in fire prevention and active fire extinguishing.

[0046] like Figures 6 to 8As shown, fire extinguishing balloon 407 is restricted to be installed in balloon cage 408, and the center of balloon cage 408 is connected with a hollow screw cap 409; the part of fire extinguishing balloon 407 extends in the hollow screw cap 409, and fire extinguishing balloon 407 is completely sealed in hollow screw cap 40, and whole fire extinguishing balloon 407 and ball cage are fixed in fire extinguishing hole 406 by hollow screw cap 409, and the water tightness in fire extinguishing hole 406 is good enough; wherein, the flame retardant material 410 in fire extinguishing balloon 407 is made up of high pressure gas plus flame retardant powder, wherein high pressure gas is high pressure nitrogen, and wherein flame retardant powder is aluminum hydroxide or magnesium hydroxide. In order to facilitate the installation of fire extinguishing balloon 407, fire extinguishing balloon 407 is placed in balloon cage 408, and is fixed in fire extinguishing hole 406 by the hollow screw cap 409 of balloon cage 408, thereby is convenient to subsequent disassembly and replacement.

[0047] like Figures 4 to 8 As shown, a fire extinguishing method based on a fire-extinguishing watertight door for a cabin is disclosed. The method adopts the above-mentioned fire-extinguishing watertight door for cabin to prevent and extinguish fire, and the fire prevention and fire extinguishing methods are as follows: when the fire has just spread to the front of the hatch assembly 4, since a fireproof and heat-insulating layer 405 is installed between the front hatch cover 401 and the rear hatch cover 402, the fireproof and heat-insulating layer 405 can play an effective fire-proof and heat-insulating role; at this time, the temperature of the front hatch cover 401 rises, and the flame will quickly burn the fire-extinguishing balloon 407 at the fire-extinguishing hole 406, and then under the push of the high-pressure gas, the flame-retardant powder will be ejected from the fire-extinguishing hole 406, and finally the fire in front of the hatch assembly 4 will be extinguished by the flame-retardant powder.

[0048] like Figures 4 and 5 、 Figures 9 and 10 As shown, five movable latches are installed between the front hatch 401 and the rear hatch 402, distributed simultaneously on the top, right, and bottom sides of the rear hatch 402. Each pair of adjacent movable latches is synchronously driven by a connecting rod. All movable latches can be simultaneously assembled to the door frame 2 under the drive of the connecting rod, thereby strengthening the hatch structure. This solution, while traditionally using only the lock 403 to lock the hatch, adds multiple movable latches distributed on the top, right, and bottom sides of the hatch. All movable latches can be simultaneously assembled to the door frame 2 under the drive of the connecting rod, thereby strengthening the hatch structure and making the closed hatch stronger. This provides more fixed points for the hatch, making it less likely to make unusual noises when the ship is sailing.

[0049] like Figure 10As shown, the movable latches include movable latch 1 411 located in the middle of the right side of rear hatch 402, movable latch 2 412 located at the top of the right side of rear hatch 402, movable latch 3 413 located at the bottom of the right side of rear hatch 402, movable latch 414 located in the middle of the top side of rear hatch 402, and movable latch 5 415 located in the middle of the bottom side of rear hatch 402. Each movable latch is connected to a control socket rotatably mounted on rear hatch 402. To increase the fixing points of hatch door assembly 4, a total of five movable latches are installed on its top, right, and bottom sides; three of them are located on the right side, with one each on the top and bottom sides, thereby improving the locking strength of hatch door assembly 4.

[0050] like Figure 9 As shown, the control socket includes a control socket 1 416 fixedly connected to a movable latch 1 411, a control socket 2 417 fixedly connected to a movable latch 2 412, a control socket 3 418 fixedly connected to a movable latch 3 413, a control socket 419 fixedly connected to a movable latch 414, and a control socket 5 420 fixedly connected to a movable latch 5 415. To facilitate control of the movement of the movable latches, the five movable latches are connected to the control sockets one by one, and movement of the movable latches is achieved by rotating the control latches.

[0051] like Figure 9 As shown, the connecting rods include an active connecting rod 421 that simultaneously rotationally connects control socket 1 416, control socket 2 417, and control socket 3 418; a driven connecting rod 1 422 that simultaneously rotationally connects control socket 2 and control socket 4; and a driven connecting rod 2 423 that simultaneously rotationally connects control socket 3 and control socket 5. The movable latch is also covered with a rubber sleeve to improve its wear resistance and prevent it from moving after insertion. To facilitate the simultaneous control of the movement of the five movable latches, the active connecting rod 421 is actuated, and under the transmission of the two driven connecting rods, the five movable latches can be simultaneously inserted into the door frame 2.

[0052] like Figures 9 and 10 As shown, the control socket 1 416 is also connected to the latch rocker 1 424 located in front of the front hatch 401 and the latch rocker 2 425 located behind the rear hatch 402. The latch rocker 1 424 and the latch rocker 2 425 are concentrically connected. In order to facilitate the actuation of the active connecting rod 421, the control socket 1 416 can be rotated at the front hatch 401 by rotating the latch rocker 1 424, thereby driving the active connecting rod 421 to move, so that five active latches can be simultaneously inserted into the door frame 2. The control socket 1 416 can be rotated at the rear hatch 402 by rotating the latch rocker 2 425, thereby driving the active connecting rod 421 to move, so that five active latches can be simultaneously inserted into the door frame 2.

[0053] like Figures 1 to 3 As shown, the door frame 2 protrudes from the front and rear sides of the cabin body 1, and the door frame 2 can completely seal the top, bottom, left, and right sides of the door assembly 4. To ensure the good watertightness of the door assembly 4, the door frame 2 is used to completely seal all four sides of the door assembly 4. The entire door assembly 4 is very thick, which can effectively ensure its good watertightness.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fire-extinguishing watertight door for a marine cabin, comprising a door frame fixed to the cabin body and a door assembly rotatably mounted on the door frame on the left side via multiple hinges; The hatch assembly includes a front hatch located at the front side, a rear hatch detachably mounted on the rear side of the front hatch, a lock fixedly mounted between the front hatch and the rear hatch, and a visible fireproof glass mounted on the rear hatch; Its characteristics are: A fireproof and heat-insulating layer is installed between the front hatch and the rear hatch, and a plurality of fire-extinguishing holes are opened on the front hatch and the fireproof and heat-insulating layer, distributed at the top, middle and bottom thereof. A fire-extinguishing balloon filled with flame-retardant material is installed in each fire-extinguishing hole, which is located between the front hatch and the rear hatch. After the fire-extinguishing balloon is burned through the fire-extinguishing hole, the flame-retardant material is sprayed out from the fire-extinguishing hole to extinguish the fire.

2. The fire-extinguishing watertight door of a marine cabin according to claim 1, characterized in that: The fire extinguishing balloon is restrictedly installed in the balloon cage, and a hollow screw sleeve is connected to the center of the balloon cage; part of the fire extinguishing balloon extends into the hollow screw sleeve, and the entire fire extinguishing balloon and the ball cage are fixed in the fire extinguishing hole through the hollow screw sleeve.

3. The fire-extinguishing watertight door of a marine cabin according to claim 2, characterized in that: The flame retardant material in the fire extinguishing balloon is composed of high-pressure gas and flame retardant powder.

4. The fire-extinguishing watertight door for a marine cabin according to claim 3, characterized in that: A plurality of movable latches are installed between the front hatch and the rear hatch, and are distributed on the top side, the right side and the bottom side of the rear hatch. The surface of each movable latch is also covered with a rubber sleeve. Every two adjacent movable latches are synchronously driven by a connecting rod. All movable latches can be simultaneously assembled on the door frame under the transmission of the connecting rod, so as to strengthen the door structure.

5. The fire-extinguishing watertight door for a marine cabin according to claim 4, characterized in that: The movable latches include movable latch 1 located in the middle of the right side of the rear hatch, movable latch 2 located at the top of the right side of the rear hatch, movable latch 3 located at the bottom of the right side of the rear hatch, movable latch 4 located in the middle of the top side of the rear hatch, and movable latch 5 located in the middle of the bottom side of the rear hatch. Each movable latch is connected to a control socket rotatably mounted on the rear hatch.

6. The fire-extinguishing watertight door for a marine cabin according to claim 5, characterized in that: The control socket includes control socket one fixedly connected to movable pin one, control socket two fixedly connected to movable pin two, control socket three fixedly connected to movable pin three, control socket four fixedly connected to movable pin four, and control socket five fixedly connected to movable pin five.

7. The fire-extinguishing watertight door for a marine cabin according to claim 6, characterized in that: The connecting rod includes an active connecting rod that simultaneously rotates and connects control socket 1, control socket 2 and control socket 3, a driven connecting rod that simultaneously rotates and connects control socket 2 and control socket 4, and a driven connecting rod that simultaneously rotates and connects control socket 3 and control socket 5.

8. The fire-extinguishing watertight door for a marine cabin according to claim 7, characterized in that: The control socket 1 is also connected to a latch rocker 1 located in front of the front hatch and a latch rocker 2 located behind the rear hatch, and the latch rocker 1 is concentrically connected to the latch rocker 2.

9. The fire-extinguishing watertight door for a marine cabin according to claim 3, characterized in that: The door frame as a whole protrudes from the front side and the rear side of the cabin body, and the door frame can seal and wrap the top side, bottom side, left side and right side of the door assembly.

10. A fire extinguishing method based on a fire extinguishing type cabin watertight door, characterized in that: The method adopts the fire-extinguishing cabin watertight door according to any one of claims 3 to 9 to prevent and extinguish fires, and the fire prevention and extinguishing methods are as follows: When the fire just spreads to the front of the hatch assembly, the fire-proof and heat-insulating layer installed between the front hatch cover and the rear hatch cover can play an effective fire-proof and heat-insulating role; at this time, the temperature of the front hatch cover rises, and the flames will quickly burn the fire-extinguishing balloon at the fire-extinguishing hole, and then, under the push of high-pressure gas, the flame-retardant powder will be sprayed out from the fire-extinguishing hole, and finally the fire in front of the hatch assembly will be extinguished by the flame-retardant powder.

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