Dangerous goods transportation carriage structure for railway transportation

Abstract

The invention relates to the technical field of railway transportation, and discloses a dangerous goods transportation carriage structure for railway transportation, which comprises a freight carriage, a goods damping mechanism, a fireproof fire extinguishing mechanism and a fireproof flame-retardant lining are arranged in the freight carriage, and an equipment box is fixedly mounted at the top of the freight carriage. And a vacuum pump, a conveying pump and a liquid storage tank are fixedly mounted in the equipment box. According to the dangerous goods transportation carriage structure for railway transportation, through the fireproof fire extinguishing mechanism, once a fire disaster occurs, a vacuum pump rapidly reduces the oxygen concentration in a freight carriage through a vacuumizing pipe and a plurality of vacuumizing heads installed outside the vacuumizing pipe so as to restrain the flame spreading speed; meanwhile, the conveying pump drives the fire extinguishing liquid in the liquid storage tank to be sprayed into the carriage through the spraying pipe and the spraying nozzle, initial fire development is rapidly controlled, the problem that a traditional carriage is lack of systematic protection measures is effectively solved, and the safety of the carriage in the transportation process is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of railway transportation, and particularly to a dangerous goods transportation carriage structure for railway transportation. Background Art

[0002] Railway freight carriages are railway vehicles dedicated to cargo transportation, with various types and different functions, including container cars, open cars, flat cars, tank cars, refrigerated cars, etc., which can meet the transportation needs of different goods such as bulk goods, liquids, gases, mechanical equipment, and dangerous goods. Such carriages usually achieve efficient loading and unloading and multimodal transport docking through standardized design.

[0003] However, there are still significant technical defects in the existing railway freight carriages when transporting flammable and explosive dangerous goods. Their structural designs are generally relatively single, lacking systematic protection measures against the characteristics of dangerous goods. The fire and heat insulation performance inside the carriage is insufficient. The traditional materials used (such as ordinary metals or non-flame-retardant polymers) are prone to combustion or release toxic gases under the action of high temperature or fire sources, and the heat insulation layer is mostly single-layer designed, making it difficult to effectively block heat transfer. Therefore, a dangerous goods transportation carriage structure for railway transportation is proposed. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a dangerous goods transportation carriage structure for railway transportation, which has the advantages of efficient fire and heat insulation, automatic fire extinguishing, and excellent shock absorption performance, and solves the problems that there are still significant technical defects in the existing railway freight carriages when transporting flammable and explosive dangerous goods, their structural designs are generally relatively single, lacking systematic protection measures against the characteristics of dangerous goods, the fire and heat insulation performance inside the carriage is insufficient, the traditional materials used (such as ordinary metals or non-flame-retardant polymers) are prone to combustion or release toxic gases under the action of high temperature or fire sources, and the heat insulation layer is mostly single-layer designed, making it difficult to effectively block heat transfer.

[0006] (II) Technical Solutions

[0007] To achieve the above purposes of efficient fire and heat insulation, automatic fire extinguishing, and excellent shock absorption performance, the present invention provides the following technical solutions: A dangerous goods transportation carriage structure for railway transportation, including a freight carriage, and a cargo shock absorption mechanism, a fire prevention and extinguishing mechanism, and a fireproof and flame-retardant lining are arranged inside the freight carriage;

[0008] The fire prevention and extinguishing mechanism includes an equipment box, a vacuum pump, a delivery pump, a liquid storage tank, a vacuum extraction pipe, a vacuum extraction head, a spraying pipe, a spraying nozzle, a connecting pipe, a liquid injection pipe, and a liquid discharge pipe. An equipment box is fixedly installed on the top of the freight carriage. A vacuum pump, a delivery pump, and a liquid storage tank are fixedly installed inside the equipment box. Three vacuum extraction pipes are respectively fixedly installed on the left inner wall and the right inner wall of the freight carriage. A number of vacuum extraction heads are fixedly installed on the outer part of each vacuum extraction pipe. A spraying pipe is fixedly installed on the inner top wall of the freight carriage. Spraying nozzles are fixedly installed at the bottom of the spraying pipe. A connecting pipe is fixedly installed at the bottom of the vacuum pump. A liquid injection pipe and a liquid discharge pipe are fixedly installed on the right side of the liquid storage tank.

[0009] Preferably, the goods shock absorption mechanism includes a goods bearing plate, spring shock absorbers, and rubber shock mounts. A goods bearing plate is slidably connected inside the freight carriage. A number of spring shock absorbers and three rubber shock mounts are fixedly installed on the inner bottom wall of the freight carriage.

[0010] Preferably, the fireproof and flame-retardant lining includes a high-temperature resistant ceramic fiber board, a calcium silicate board, and an intumescent fireproof coating. A calcium silicate board is fixedly installed on the inner wall of the freight carriage, and an intumescent fireproof coating is provided between the calcium silicate board and the inner wall of the freight carriage. A high-temperature resistant ceramic fiber board is fixedly installed on the inner side of the calcium silicate board. An aluminum alloy protection board is fixedly installed on the inner side of the high-temperature resistant ceramic fiber board.

[0011] Preferably, sealed compartment doors are movably installed on both the left and right sides of the freight carriage. The number of spraying nozzles is several, and several spraying nozzles are connected to each other through two spraying pipes. A second delivery pipe connected to one of the spraying pipes is fixedly installed at the bottom of the delivery pump.

[0012] Preferably, a first delivery pipe connected to the liquid storage tank is fixedly installed on the right side of the delivery pump. The right sides of the liquid injection pipe and the liquid discharge pipe both penetrate through the right inner wall of the equipment box and extend to the outside of the equipment box. A control valve is installed on the outside of the liquid discharge pipe.

[0013] Preferably, the vacuum extraction pipes on the left inner wall and the right inner wall of the freight carriage are connected to each other through a connecting pipe. The bottom of the connecting pipe penetrates through the top of the freight carriage and is connected to the connecting pipe. A temperature sensor and a smoke detector are also installed inside the freight carriage.

[0014] Preferably, the spring shock absorbers are longitudinally arranged in four columns, and the number of spring shock absorbers in each column is several. The three rubber shock mounts are located between the four columns of spring shock absorbers. The tops of the spring shock absorbers and the rubber shock mounts are both fixedly connected to the bottom of the goods bearing plate.

[0015] A fire prevention and extinguishing method for a dangerous goods transportation carriage used in railway transportation, including the structure of a dangerous goods transportation carriage for railway transportation, and further including the following steps:

[0016] S1. Goods placement and shock absorption: First, carefully place the dangerous goods to be transported on the goods shock absorption mechanism inside the freight carriage. When the goods are placed on the goods bearing plate, several spring shock absorbers and three rubber shock mounts configured at the bottom can effectively absorb the vibrations generated during transportation, ensuring the stability of the goods during long-distance railway transportation and reducing the risk of damage caused by vibrations;

[0017] S2. Fire occurrence and initial response: Once a fire breaks out in the goods, the fire prevention and extinguishing mechanism is immediately activated for preliminary response. The vacuum pump quickly reduces the oxygen concentration inside the freight carriage through the vacuum extraction pipe and multiple vacuum extraction heads installed outside it, inhibiting the spread speed of the flame; at the same time, the delivery pump starts to work, and sprays the fire extinguishing liquid stored in the liquid storage tank into the carriage through the spraying pipe and the spraying nozzles fixedly installed at the bottom. This process quickly and effectively controls the development of the initial fire and buys precious time for subsequent fire extinguishing operations;

[0018] S3. Preventing the spread of fire: To further protect the safety inside and outside the freight carriage, while the fire prevention and extinguishing mechanism is actively extinguishing the fire, the fireproof and flame-retardant lining plays a key role. The high-temperature resistant ceramic fiber board, calcium silicate board, and intumescent fireproof coating jointly build a solid defense line, which can not only withstand high temperatures but also effectively prevent the flame from penetrating the carriage wall and spreading outward.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention provides a structure of a dangerous goods transportation carriage for railway transportation, having the following beneficial effects:

[0021] 1. For the structure of the dangerous goods transportation carriage for railway transportation, through the fire prevention and extinguishing mechanism, once a fire occurs, the vacuum pump quickly reduces the oxygen concentration inside the freight carriage through the vacuum extraction pipe and multiple vacuum extraction heads installed outside it to inhibit the spread speed of the flame; at the same time, the delivery pump drives the fire extinguishing liquid in the liquid storage tank to be sprayed into the carriage through the spraying pipe and the spraying nozzles, quickly controlling the development of the initial fire, and effectively solving the problem that traditional carriages lack systematic protection measures, and enhancing the safety of the carriage during transportation.

[0022] 2. For the structure of the dangerous goods transportation carriage for railway transportation, through the fireproof and flame-retardant lining, it can not only withstand high temperatures but also prevent the flame from penetrating the carriage wall and spreading. The high-temperature resistant ceramic fiber board reduces the heat conduction speed, the calcium silicate board and the carbonized layer form a double barrier, and the aluminum alloy protection board disperses heat, ensuring the integrity of the carriage structure in case of fire and solving the problem of insufficient heat insulation performance of traditional carriages. Brief Description of the Drawings

[0023] Figure 1 is a schematic cross-sectional structure diagram of the present invention;

[0024] Figure 2 is a schematic diagram of the cargo shock absorption mechanism of the present invention;

[0025] Figure 3 is a schematic diagram of the fire prevention and extinguishing mechanism of the present invention;

[0026] Figure 4 is a three-dimensional schematic diagram of the cargo shock absorption mechanism of the present invention;

[0027] Figure 5 is a three-dimensional schematic diagram of the spraying pipe and spraying nozzle of the present invention;

[0028] Figure 6 is a schematic diagram of the fireproof and flame-retardant lining of the present invention.

[0029] In the figure: 1, freight car body; 2, cargo shock absorption mechanism; 201, cargo bearing plate; 202, spring shock absorber; 203, rubber shock mount; 3, fire prevention and extinguishing mechanism; 301, equipment box; 302, vacuum pump; 303, transfer pump; 304, liquid storage tank; 305, vacuum extraction pipe; 306, vacuum extraction head; 307, spraying pipe; 308, spraying nozzle; 309, connecting pipe; 310, liquid injection pipe; 311, drain pipe; 4, fireproof and flame-retardant lining; 401, high-temperature resistant ceramic fiber board; 402, calcium silicate board; 403, intumescent fireproof coating. Detailed Description of the Invention

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figure 1-6 , a dangerous goods transportation carriage structure for railway transportation, including a freight car body 1, and a cargo shock absorption mechanism 2, a fire prevention and extinguishing mechanism 3, and a fireproof and flame-retardant lining 4 are arranged inside the freight car body 1;

[0032] The fire prevention and extinguishing mechanism 3 includes an equipment box 301, a vacuum pump 302, a transfer pump 303, a liquid storage tank 304, a vacuum extraction pipe 305, a vacuum extraction head 306, a spraying pipe 307, a spraying nozzle 308, a connecting pipe 309, a liquid injection pipe 310 and a liquid discharge pipe 311. An equipment box 301 is fixedly installed on the top of the freight carriage 1. A vacuum pump 302, a transfer pump 303 and a liquid storage tank 304 are fixedly installed inside the equipment box 301. On the inner left wall and the inner right wall of the freight carriage 1, three vacuum extraction pipes 305 are respectively fixedly installed. A number of vacuum extraction heads 306 are fixedly installed on the outside of each vacuum extraction pipe 305. A spraying pipe 307 is fixedly installed on the inner top wall of the freight carriage 1. A spraying nozzle 308 is fixedly installed at the bottom of the spraying pipe 307. A connecting pipe 309 is fixedly installed at the bottom of the vacuum pump 302. A liquid injection pipe 310 and a liquid discharge pipe 311 are fixedly installed on the right side of the liquid storage tank 304.

[0033] The cargo shock absorption mechanism 2 includes a cargo bearing plate 201, spring shock absorbers 202 and rubber shock mounts 203. A cargo bearing plate 201 is slidably connected inside the freight carriage 1. A number of spring shock absorbers 202 and three rubber shock mounts 203 are fixedly installed on the inner bottom wall of the freight carriage 1.

[0034] The fireproof and flame-retardant lining 4 includes a high-temperature resistant ceramic fiber board 401, a calcium silicate board 402 and an intumescent fireproof coating 403. A calcium silicate board 402 is fixedly installed on the inner wall of the freight carriage 1. An intumescent fireproof coating 403 is arranged between the calcium silicate board 402 and the inner wall of the freight carriage 1. A high-temperature resistant ceramic fiber board 401 is fixedly installed on the inner side of the calcium silicate board 402. An aluminum alloy protection board is fixedly installed on the inner side of the high-temperature resistant ceramic fiber board 401.

[0035] Example 1:

[0036] The cargo shock absorption mechanism 2 is composed of a cargo bearing plate 201, spring shock absorbers 202 and rubber shock mounts 203, and realizes stable loading during the transportation of dangerous goods through a multi-stage shock absorption structure.

[0037] The cargo bearing plate 201 is made of high-strength aluminum alloy with a thickness of 5 mm, and anti-slip patterns are arranged on the surface. It is slidably connected to the inner bottom wall of the freight carriage 1 through 4 groups of guiding slide rails to limit the displacement in the vertical direction.

[0038] The spring shock absorbers 202 are longitudinally arranged in 4 columns, each column contains 6 pre-tightened helical springs, the stiffness coefficient is 500 N / mm, and the pre-tightening force can be adjusted through the top adjusting nut; a damping oil cavity is integrated inside the spring, and the piston movement damping coefficient is 100 N·s / m, which can absorb the vibration energy with a frequency of 10 - 50 Hz.

[0039] The rubber shock absorber seat 203 is made of a natural rubber and nitrile rubber composite with a Shore hardness of 60-70°. It is distributed in a triangular pattern in the gaps of the spring shock absorber 202, capable of bearing a maximum lateral load of 2000 N to prevent the goods from tipping over.

[0040] In the shock absorption cooperation mechanism, during longitudinal impact, the spring shock absorber 202 buffers through pre-tightening force, and the damping oil chamber dissipates high-frequency vibration energy, reducing the acceleration to below 0.5g according to the ISO8305 standard; during lateral offset, the rubber shock absorber seat 203 absorbs the lateral force through shear deformation and cooperates with the guiding slide rail to limit the offset of the goods, ensuring that the center of gravity is always within the range of ±5 cm from the center of the carriage.

[0041] Example Two:

[0042] The vacuum pump 302 is a two-stage Roots vacuum pump with a pumping speed of 500 m 3 / h. It is connected to 6 vacuum extraction pipes 305 on the left and right walls of the carriage through a connecting pipe 309. The vacuum extraction heads 306 are evenly distributed at a density of 2 per meter, and the oxygen concentration in the carriage is reduced to below 12% within 30 seconds.

[0043] The transfer pump 303 is a centrifugal pump with a flow rate of 100 L / min. It extracts an aqueous sodium bicarbonate solution with a pH value of 10-11 containing 0.5% surfactant from the liquid storage tank 304 and is connected to the spraying pipe 307 through a second transfer pipe. The fire extinguishing process is divided into four stages:

[0044] Fire trigger: When the temperature sensor monitors that the temperature in the carriage is ≥120°C, or the smoke detector detects ≥1% obscuration / m of smoke, the fire extinguishing program is started;

[0045] Vacuum extraction stage: The vacuum pump 302 is started, and the air in the carriage is extracted through the vacuum extraction pipes 305 and the vacuum extraction heads 306, reducing the oxygen concentration to below 12% within 30 seconds;

[0046] Fire extinguishing agent spraying: The transfer pump 303 drives the fire extinguishing liquid to be distributed to the spray nozzles 308 through 2 spraying pipes 307. The spray cone angle is 60°, covering 90% of the carriage area, and the spraying pressure is 0.3 MPa;

[0047] Afterglow suppression: After spraying for 10 minutes, the vacuum pump 302 continues to operate for 20 minutes to ensure that the remaining combustibles are suffocated. The drain pipe 311 is equipped with a control valve to facilitate the replacement of the corresponding fire extinguishing agent in the liquid storage tank 304 according to the type of dangerous goods.

[0048] Example Three:

[0049] The fireproof and flame-retardant inner lining 4 is composed of three layers of materials working together:

[0050] High-temperature resistant ceramic fiber board 401: Made of alumina-zirconia ceramic fiber Al 2O 3 / ZrO 2 , density 160kg / m 3 , thermal conductivity 0.04W / (m·K), thickness 10mm, fire-resistant temperature 1200℃, thermal expansion to 15mm porous insulation layer;

[0051] Calcium silicate board 402: Reinforced with calcium silicate and glass fiber, with a compressive strength of 12MPa and a fire resistance limit of 2 hours, GB8624B1 level. Combined with the intumescent fire retardant coating 403, it releases expanded graphite when heated to form a 20mm carbonized layer to block heat conduction;

[0052] Aluminum alloy protective plate: 3mm thick, anodized surface, with both thermal conductivity and mechanical strength to prevent calcium silicate board 402 from cracking at high temperature.

[0053] With the synergistic effect of the multi-layer structure, the fire resistance limit is increased to 3 hours. The ceramic fiber board 401 reduces the heat conduction rate, the calcium silicate board 402 forms a double barrier with the carbonized layer, and the aluminum alloy protective plate disperses heat to ensure the structural integrity of the car during a fire.

[0054] In summary, the dangerous goods transport carriage structure for railway transportation, through the fire prevention and extinguishing mechanism 3, once a fire occurs, the vacuum pump 302 quickly reduces the oxygen concentration in the freight carriage 1 through the vacuum pipe 305 and the multiple vacuum heads 306 installed outside it to suppress the flame spread speed; at the same time, the delivery pump 303 drives the fire extinguishing liquid in the liquid storage tank 304 to spray into the carriage through the spray pipe 307 and the spray nozzle 308, quickly controlling the development of the initial fire, effectively solving the problem of the lack of systematic protection measures in traditional carriages, and enhancing the safety of the carriages during transportation.

[0055] In addition, the dangerous goods transport carriage structure for railway transportation can not only withstand high temperatures, but also prevent flames from penetrating the carriage wall and spreading through the fire-retardant lining 4. The high-temperature resistant ceramic fiber board 401 reduces the heat conduction rate, the calcium silicate board 402 forms a double barrier with the carbonized layer, and the aluminum alloy protective plate disperses heat, ensuring the integrity of the carriage structure in a fire, solving the problem of insufficient thermal insulation performance of traditional carriages, and solving the significant technical defects of existing railway freight carriages when transporting flammable and explosive dangerous goods. Their structural designs are generally simple and lack systematic protection measures for the characteristics of dangerous goods. The fireproof and heat-insulating performance in the carriage is insufficient. The traditional materials used, such as ordinary metals or non-flame-retardant polymers, are prone to combustion or release of toxic gases under high temperature or fire source, and the thermal insulation layer is mostly a single-layer design, which is difficult to effectively block the problem of heat transfer.

[0056] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0057] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dangerous goods transport carriage structure for railway transportation, comprising a freight carriage (1), characterized in that: The interior of the freight carriage (1) is provided with a cargo shock absorbing mechanism (2), a fire prevention and extinguishing mechanism (3) and a fireproof and flame-retardant lining (4); The fire prevention and extinguishing mechanism (3) comprises an equipment box (301), a vacuum pump (302), a delivery pump (303), a liquid storage tank (304), a vacuum pipe (305), a vacuum head (306), a spray pipe (307), a spray nozzle (308), a connecting pipe (309), a liquid injection pipe (310) and a liquid discharge pipe (311). The equipment box (301) is fixedly installed on the top of the freight carriage (1), and the vacuum pump (302), the delivery pump (303) and the liquid storage tank (304) are fixedly installed inside the equipment box (301). Three vacuum pipes (305) are fixedly installed on the inner left wall and the inner right wall of the compartment (1), and a plurality of vacuum heads (306) are fixedly installed on the outside of each vacuum pipe (305). A spray pipe (307) is fixedly installed on the inner top wall of the freight compartment (1), and a spray nozzle (308) is fixedly installed on the bottom of the spray pipe (307). A connecting pipe (309) is fixedly installed on the bottom of the vacuum pump (302), and a liquid injection pipe (310) and a liquid discharge pipe (311) are fixedly installed on the right side of the liquid storage tank (304).

2. The dangerous goods transport carriage structure for railway transportation according to claim 1, characterized in that: The cargo shock absorbing mechanism (2) comprises a cargo carrying plate (201), a spring shock absorber (202) and a rubber shock absorbing seat (203); the cargo carrying plate (201) is slidably connected inside the cargo carriage (1); and a plurality of spring shock absorbers (202) and three rubber shock absorbing seats (203) are fixedly mounted on the inner bottom wall of the cargo carriage (1).

3. The dangerous goods transport carriage structure for railway transportation according to claim 1, characterized in that: The fireproof and flame-retardant lining (4) comprises a high-temperature resistant ceramic fiberboard (401), a calcium silicate board (402) and an intumescent fire-retardant coating (403); the inner wall of the freight compartment (1) is fixedly mounted with the calcium silicate board (402), and the intumescent fire-retardant coating (403) is provided between the calcium silicate board (402) and the inner wall of the freight compartment (1); the inner side of the calcium silicate board (402) is fixedly mounted with a high-temperature resistant ceramic fiberboard (401), and the inner side of the high-temperature resistant ceramic fiberboard (401) is fixedly mounted with an aluminum alloy protective plate.

4. The dangerous goods transport carriage structure for railway transportation according to claim 1, characterized in that: The freight compartment (1) is movably provided with sealed compartment doors on both left and right sides. The number of the spray nozzles (308) is a plurality, and the plurality of the spray nozzles (308) are connected via two spray pipes (307). A second delivery pipe connected to one of the spray pipes (307) is fixedly provided at the bottom of the delivery pump (303).

5. The dangerous goods transport carriage structure for railway transportation according to claim 1, characterized in that: A first delivery pipe connected to the liquid storage box (304) is fixedly installed on the right side of the delivery pump (303); the right sides of the injection pipe (310) and the discharge pipe (311) both penetrate the inner right wall of the equipment box (301) and extend to the outside of the equipment box (301); and a control valve is installed on the outside of the discharge pipe (311).

6. The dangerous goods transport carriage structure for railway transportation according to claim 1, characterized in that: The vacuum pipes (305) on the left and right inner walls of the freight compartment (1) are connected to each other via a connecting pipe, the bottom of the connecting pipe (309) passes through the top of the freight compartment (1) and is connected to the connecting pipe, and a temperature sensor and a smoke detector are also installed inside the freight compartment (1).

7. The dangerous goods transport carriage structure for railway transportation according to claim 2, characterized in that: The spring shock absorbers (202) are arranged in four rows in a longitudinal direction, and the number of the spring shock absorbers (202) in each row is a plurality. The three rubber shock absorber seats (203) are located between the four rows of spring shock absorbers (202), and the tops of the spring shock absorbers (202) and the rubber shock absorber seats (203) are fixedly connected to the bottom of the cargo carrying plate (201).

8. A fire prevention and extinguishing method for dangerous goods transport carriages used in railway transportation, characterized in that: The dangerous goods transport carriage structure for railway transportation according to claims 1 to 7 further comprises the following steps: S1. Cargo placement and shock absorption: First, the dangerous goods to be transported are carefully placed on the cargo shock absorption mechanism (2) inside the freight carriage (1). When the goods are placed on the cargo carrying plate (201), a plurality of spring shock absorbers (202) and three rubber shock absorbing seats (203) arranged at the bottom can effectively absorb the vibration generated during transportation, thereby ensuring the stability of the goods during long-distance railway transportation and reducing the risk of damage caused by vibration. S2. Fire occurrence and initial response: Once the cargo catches fire, the fire prevention and extinguishing mechanism (3) is immediately activated for initial response. The vacuum pump (302) rapidly reduces the oxygen concentration in the freight compartment (1) through the vacuum pipe (305) and the multiple vacuum heads (306) installed outside thereof, thereby suppressing the spread of the flame. At the same time, the delivery pump (303) starts to work, spraying the fire extinguishing liquid stored in the liquid storage tank (304) into the compartment through the spray pipe (307) and the spray nozzle (308) fixedly installed at the bottom. This process quickly and effectively controls the development of the initial fire, thereby buying valuable time for subsequent fire extinguishing operations. S3. Preventing the spread of fire: In order to further protect the safety inside and outside the freight compartment (1), while the fire prevention and extinguishing mechanism (3) actively extinguishes the fire, the fire-retardant lining (4) plays a key role. The high-temperature resistant ceramic fiber board (401), the calcium silicate board (402) and the intumescent fire retardant coating (403) together form a solid defense line that can not only withstand high temperatures, but also effectively prevent the flame from penetrating the compartment wall and spreading outward.

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