Railway vehicle cab rear end wall and method of designing the same

Abstract

The application discloses a rear end wall of a driver's cab of a rail vehicle, which comprises a wall plate, a door plate, a door upper plate and a passage plate, and the wall plate, the door plate, the door upper plate and the passage plate each comprise a panel, a back plate and a double-core layer which is bonded between the panel and the back plate, characterized in that the double-core layer comprises an inorganic fireproof core material and a phenolic foaming core material which is bonded with the inorganic fireproof core material, the phenolic foaming core material in the wall plate, the door plate and the door upper plate is pre-embedded with an aluminum alloy framework, a steel plate is pre-embedded in the passage plate, the cross section of the aluminum alloy framework is formed by a plurality of rectangular connections, and the steel plate in the passage plate is fixedly connected with the aluminum alloy framework in the wall plate. In the application, the inorganic fireproof core material and the phenolic foaming core material form a double-core layer structure, the thickness of the wall body is effectively reduced on the basis of meeting the light weight requirement and the fireproof performance of the wall body, the supporting performance and the strength of the wall body are improved, and the structural fire resistance performance requirements of different grades of 15 minutes and 20 minutes are met. The application further provides a design method of the rear end wall of the driver's cab of the rail vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of rail vehicle cab rear end wall and its design method, belong to rail vehicle cab technical field. BACKGROUND

[0002] The driver's room of rail transit vehicle and passenger compartment are separately arranged, when the passenger compartment appears human disturbance or unstable factors such as spontaneous combustion, the flame or other dangerous factors can be effectively blocked from spreading to the driver's room through the rear end wall of the driver's room, thereby playing a role in protecting the vehicle operating equipment and the safety of the driver. The rear end wall of the traditional rail transit vehicle driver's room mainly uses steel plate or fire retardant paint scheme to achieve the structural fire resistance requirement, the entire fire surface is coated with fire retardant paint, using steel plate will increase the weight of the end wall, and using fire retardant paint has the phenomena of blistering, powdering, and even falling off, and the fireproof reliability is not high. In order to meet the lightweight requirement of the vehicle interior components and avoid the use of fire retardant paint, a sandwich structure is used in the end wall of the rail vehicle, which includes a panel and a core board sandwiched between the two panels. In order to meet the lightweight requirement, the core board is usually made of foam core, for example, a kind of rail transit vehicle structural fire resistance end wall described in patent document CN112429026A. The wallboard and door panel are both sandwich structure panels, which include a panel and a foam core board sandwiched between the two panels. The edge of the foam core board is wrapped with a wrapping skeleton, which is glued to the foam core board. The panel and the foam core board are hot-pressed and glued together and riveted with the wrapping skeleton. This end wall with sandwich structure meets the requirements of lightweight, fireproof and fireproof of the driver's room, but still has the following shortcomings:

[0003] 1. In order to meet the fireproof requirement, the thickness of the foam core layer is large, which results in a large thickness of the entire fire resistance end wall and a large space occupancy, which is not conducive to the compact space arrangement of the driver's room.

[0004] 2. Due to the small density of the foam core layer, the surface density of the wall is small, and the overall wrapping of the outer edge of the wall is required to improve the overall strength, but the strength and support performance of the wrapping skeleton are limited, and the relative edges of the door panel and the wall panel are prone to deformation after long-term use.

[0005] 3. The wall panel does not have a rigid connecting piece inside, and when the wall panel needs to be connected with a passageway plate that separates the passageway inside the driver's room from the electrical room, the connection strength is not enough, and the connection position is prone to deformation, and the assembly reliability of the fire resistance end wall needs to be improved. SUMMARY

[0006] The track vehicle driver's room rear end wall provided by the application is composed of a double-core layer structure of inorganic fireproof core material and phenolic foaming core material, effectively reduces the wall thickness on the basis of meeting the light weight requirement and fireproof performance of the wall, meets the compact space layout requirement of the driver's room, improves the support performance and strength of the wall, meets the structural fire resistance performance requirement of different grades of 15 minutes and 20 minutes, and improves the assembly reliability of the rear end wall.

[0007] To achieve the above-mentioned purposes, the technical scheme adopted by the application is:

[0008] The track vehicle driver's room rear end wall comprises wallboards symmetrically distributed left and right, a door plate installed between the wallboards, a door upper plate installed between the wallboards and located above the door plate, and a passageway plate vertically fixed on the back of the wallboard to separate the passageway in the driver's room from the electrical room, wherein the wallboard, the door plate, the door upper plate and the passageway plate all comprise a panel, a back plate and a double-core layer bonded between the panel and the back plate, and the double-core layer comprises inorganic fireproof core material and phenolic foaming core material bonded with the inorganic fireproof core material, the phenolic foaming core material in the wallboard, the door plate and the door upper plate is pre-buried with an aluminum alloy framework, the passageway plate is pre-buried with a steel plate, the cross section of the aluminum alloy framework is formed by multiple rectangular connections, and the steel plate in the passageway plate is fixedly connected with the aluminum alloy framework in the wallboard.

[0009] Preferably, one side of the wallboard close to the door plate is a thick area of the wallboard, the side away from the door plate is a thin area of the wallboard with a thickness 10-15mm smaller than that of the thick area of the wallboard, a transition step surface is formed on the back of the wallboard between the thin area and the thick area of the wallboard, the aluminum alloy framework in the wallboard comprises an inner end framework arranged in the inner end of the thick area of the wallboard and a thickness transition framework arranged at the position of the transition step surface, the thickness transition framework has a step surface matched with the transition step surface, the passageway plate is arranged in the thick area of the wallboard and aligned with the thickness transition framework, and the steel plate embedded in the thickness transition framework is parallel to the wallboard.

[0010] Preferably, the back of the thin area of the wallboard is pasted with fireproof and heat insulation felt, and the fireproof and heat insulation felt extends to the outer end surface of the wallboard and the transition step surface, and a U-shaped clamping edge is sleeved on the outer end surface of the wallboard.

[0011] Preferably, the back of the wallboard at the position of the thickness transition framework is pasted with a Z-shaped connecting profile, the Z-shaped connecting profile is attached to the transition step surface and extends to the back of the passageway plate, the back of the passageway plate is pasted with fireproof and heat insulation felt, the steel plate pre-buried in the passageway plate corresponds to the Z-shaped connecting profile, and the Z-shaped connecting profile is fixedly connected with the steel plate pre-buried in the passageway plate and the steel plate in the thickness transition framework through bolts.

[0012] Preferably, the panel and the inorganic fireproof core material are bonded by inorganic silica gel, and the fireproof and heat insulation felt is bonded to the back of the wallboard and the back of the passageway plate by inorganic silica gel.

[0013] Preferably, the aluminum alloy framework in the door plate includes door plate side edge frameworks arranged at the left and right ends of the door plate, the door plate side edge frameworks are arranged opposite to the corresponding wall inner end frameworks, one end of the door plate side edge framework is connected to the wall inner end framework of the one side wall plate through a hinge, and a steel plate is embedded in the door plate side edge framework and the wall inner end framework and is fixed to the hinge, the door plate side edge framework and the corresponding wall inner end framework are elastically contacted through a buffer rubber strip, and fireproof expansion rubber strips are respectively pasted on the door plate side edge framework and the corresponding wall inner end framework.

[0014] Preferably, the aluminum alloy framework of the door upper plate includes door upper plate side edge frameworks arranged at the left and right ends of the door upper plate, the door upper plate side edge frameworks are arranged opposite to the corresponding wall inner end frameworks, and the door upper plate side edge frameworks are connected to the wall inner end frameworks through door upper plate connecting profiles, the door upper plate connecting profiles are respectively pasted on the back surfaces of the wall plate and the door upper plate and are clamped between the door upper plate side edge frameworks and the wall inner end frameworks, and the door upper plate connecting profiles are respectively fixed to the wall inner end frameworks and the door upper plate side edge frameworks through bolts.

[0015] Preferably, the aluminum alloy framework of the door upper plate includes a door upper plate lower end framework arranged at the lower end of the door upper plate, the aluminum alloy framework of the door plate includes door plate end frameworks respectively arranged at the upper end and the lower end of the door plate, the door upper plate lower end framework is arranged opposite to the door plate end framework at the upper end of the door plate and is elastically contacted through a buffer rubber strip, and fireproof expansion rubber strips are respectively pasted on the door upper plate lower end framework and the door plate end framework at the upper end of the door plate, and a fireproof expansion rubber strip opposite to the floor of the cab is pasted on the door plate end framework at the lower end of the door plate.

[0016] Preferably, the face plate and the back plate are both fireproof fiber reinforced resin plates with a density of 1500-2100 kg / m 3 and a thickness of 1-2 mm; the inorganic fireproof core material has a density of 2000±200 kg / m 3 , an A-level fireproof rating, and a thickness of 3±0.5 mm; and the phenolic foam core material has a density of 200-300 kg / m 3 , and the thickness of the phenolic foam core material is at least three times the thickness of the inorganic fireproof core material.

[0017] The design method of the rear end wall of the cab of the rail vehicle has the characteristics that the thicknesses of the inorganic fireproof core material and the phenolic foam core material in the double-core layer are adjusted according to the structural fire resistance requirements of the rear end wall of the cab of the rail vehicle, so that the rear end wall of the cab of the rail vehicle meets the structural fire resistance requirements of different levels for 15 minutes to 20 minutes.

[0018] The application has the following beneficial effects:

[0019] The rear wall of the driver's cab of this invention comprises a double-core layer consisting of an inorganic fire-resistant core material and a phenolic foam core material. The inorganic fire-resistant core material has high density, high heat resistance, and high strength, while the phenolic foam core material is lightweight, rigid, has good dimensional stability, and high insulation performance. The inorganic fire-resistant core material and the phenolic foam core material form a double-core layer structure. Compared to a single, very thick core material, the inorganic fire-resistant core material increases fire resistance, making it less prone to burn-through in high-temperature fires. Furthermore, it effectively reduces the wall thickness while meeting the requirements for lightweight and fire-resistant walls, thus satisfying the compact space layout requirements of the driver's cab. To improve the wall's surface density and avoid overall edge wrapping, the wall's support performance and strength are enhanced. The thickness of the inorganic core material and phenolic foam core material can be adjusted according to the structural fire resistance requirements of the rear wall of the driver's cab to meet different levels of structural fire resistance requirements, such as 15 minutes and 20 minutes. Aluminum alloy frames are pre-embedded in the phenolic foam core materials of the wall panels, door panels, and door top panels, and steel plates are pre-embedded in the passageway panels. The cross-section of the aluminum alloy frame is formed by connecting multiple rectangles, which has high strength and is not easily deformed, forming a rigid connection between the wall panels and door panels, door top panels, and passageway panels, thus improving the assembly reliability of the rear wall. Attached Figure Description

[0020] Figure 1 This is a front view of the rear wall of the driver's cab of a rail vehicle.

[0021] Figure 2 This is a cross-sectional view of the rear wall of the driver's cab of a rail vehicle at the passageway slab location.

[0022] Figure 3 This is a lateral sectional view of the rear wall of the driver's cab of a rail vehicle at the position above the door.

[0023] Figure 4 This is a cross-sectional view of the hinged joint between the door panel and the wall panel.

[0024] Figure 5 This is a schematic diagram showing the connection between the top panel of the door and the wall panel.

[0025] Figure 6 This is a schematic diagram showing the connection between the wall panel and the passageway panel.

[0026] Figure 7 This is a sectional view of the passageway slab.

[0027] Figure 8 This is a longitudinal sectional view of the top panel and the door panel. Detailed Implementation

[0028] The following is combined Figures 1-8 The embodiments of the present invention will be described in detail below.

[0029] The rear end wall of the driver's cab of a rail vehicle comprises left and right symmetrical wall panels 1, a door panel 2 arranged between the wall panels 1, a door upper panel 3 arranged between the wall panels 1 and above the door panel 2, and a passageway panel 4 arranged vertically on the back of the wall panels 1 to separate the passageway inside the driver's cab from the electrical room, wherein the wall panels 1, the door panel 2, the door upper panel 3 and the passageway panel 4 each comprise a face plate 5, a back plate 6 and a double-core layer 7 bonded between the face plate 5 and the back plate 6, characterized in that the double-core layer 7 comprises an inorganic fireproof core material 8 and a phenolic foaming core material 9 bonded with the inorganic fireproof core material 8, the phenolic foaming core material 9 in the wall panels 1, the door panel 2 and the door upper panel 3 is pre-buried with an aluminum alloy framework 10, and the passageway panel 4 is pre-buried with a steel plate 11, the cross section of the aluminum alloy framework 10 is formed by multiple rectangular connections, and the steel plate 11 in the passageway panel 4 is fixedly connected with the aluminum alloy framework 10 in the wall panels 1.

[0030] The rear end wall of the driver's cab of a rail vehicle described above, the double-core layer 7 comprises an inorganic fireproof core material 8 and a phenolic foaming core material 9, the inorganic fireproof core material 8 has high density, high heat resistance and high strength, the phenolic foaming core material 9 has light weight, high rigidity, good dimensional stability and high insulation and heat insulation performance, the inorganic fireproof core material 8 and the phenolic foaming core material 9 form a double-core layer structure, compared with a single-layer thick core material, the inorganic fireproof core material 8 increases the fire resistance and is less likely to be burnt through in a high-temperature fire, and can effectively reduce the thickness of the wall body while meeting the requirements of light weight and fire resistance of the wall body, meet the compact space arrangement requirements of the driver's cab, improve the surface density of the wall body while reducing the thickness of the wall body, avoid overall edge covering, improve the support performance and strength of the wall body, and adjust the thickness of the inorganic core material 8 and the phenolic foaming core material 9 according to the structural fire resistance requirements of the rear end wall of the driver's cab to meet the structural fire resistance requirements of different levels of 15 minutes and 20 minutes; the phenolic foaming core material 9 in the wall panels 1, the door panel 2 and the door upper panel 3 is pre-buried with an aluminum alloy framework 10, and the passageway panel 4 is pre-buried with a steel plate 11, the cross section of the aluminum alloy framework 10 is formed by multiple rectangular connections, has high strength and is less likely to be deformed, forms a rigid connection of the wall panels 1 with the door panel 2, the door upper panel 3 and the passageway panel 4, and improves the assembly reliability of the rear end wall.

[0031] The wallboard 1 is thick on one side of the door plate 2 and thin on the other side, forming a wallboard thick area 12 and a wallboard thin area 13, further reducing the weight of the wallboard 1, and using the thickness transition skeleton 102 to transition support the wallboard thick area 12 and the wallboard thin area 13, avoiding the strength reduction of the wallboard 1 due to the change in thickness, and at the same time using the thickness transition skeleton 102 to support and connect the corridor plate 4, making the corridor plate 4 and the wallboard 1 form a rigid connection, and setting a steel plate 11 in the thickness transition skeleton 102 to form support for the corridor plate 4, ensuring effective support of the wallboard 1 to the corridor plate 4, preventing the wallboard 1 from deforming due to the installation of the corridor plate 4.

[0032] The back of the wallboard thin area 13 is pasted with a fire-resistant insulation felt 15, and the fire-resistant insulation felt 15 extends to the outer end surface of the wallboard 1 and the transition step surface 14, and a U-shaped clamping edge 16 is sleeved on the outer end surface of the wallboard 1. The fire-resistant insulation felt 15 compensates for the insufficient heat insulation of the wallboard thin area 13 due to the reduction in thickness, the outer end surface of the wallboard is covered with the fire-resistant insulation felt 15, and the U-shaped clamping edge 16 is installed, which can effectively avoid the fire caused by the high temperature of the outer end of the wallboard.

[0033] The back of the wallboard thin area 13 is pasted with a fire-resistant insulation felt 15, and the fire-resistant insulation felt 15 extends to the outer end surface of the wallboard 1 and the transition step surface 14, and a U-shaped clamping edge 16 is sleeved on the outer end surface of the wallboard 1. The fire-resistant insulation felt 15 compensates for the insufficient heat insulation of the wallboard thin area 13 due to the reduction in thickness, the outer end surface of the wallboard is covered with the fire-resistant insulation felt 15, and the U-shaped clamping edge 16 is installed, which can effectively avoid the fire caused by the high temperature of the outer end of the wallboard.

[0034] The panel 5 and the inorganic fireproof core material 8 are bonded by inorganic silica gel, and the fireproof and heat-insulating felt 16 is bonded on the back of the wallboard 1 and the back of the passageway board 4 by inorganic silica gel. The inorganic silica gel is used to bond the inorganic fireproof core material 8 and the fireproof and heat-insulating felt 16, so as to increase the fireproof and heat-insulating property and bonding reliability under high temperature.

[0035] The aluminum alloy framework 10 in the door plate 2 comprises door plate side edge frameworks 103 arranged at the left and right ends of the door plate 2, and the door plate side edge frameworks 103 are arranged opposite to the corresponding wall inner end frameworks 101. One end of the door plate side edge framework 103 is connected to the wall inner end framework 101 of the wall plate on one side through a hinge, and the door plate side edge framework 103 and the wall inner end framework 101 are both embedded with a steel plate 11 fixed by the hinge. The door plate side edge framework 103 and the corresponding wall inner end framework 101 are elastically contacted through a buffer rubber strip 18, and the fireproof and expansion rubber strips 19 are arranged opposite to each other on the door plate side edge framework 103 and the corresponding wall inner end framework 101. The door gap is formed between the door plate side edge framework 103 and the corresponding wall inner end framework 101, and the fireproof and expansion rubber strips 19 are arranged in the door gap. The fireproof and expansion rubber strips 19 can expand more than 20 times and carbonize under the condition of high temperature, so as to block the gap of the door gap and prevent the smoke and fire from entering the cab. The buffer rubber strip 18 can satisfy the buffering and mute requirements between the door plate 2 and the wall plate 1.

[0036] The aluminum alloy framework 10 of the door upper plate 3 comprises door upper plate side edge frameworks 104 arranged at the left and right ends of the door upper plate 3, and the door upper plate side edge frameworks 104 are arranged opposite to the corresponding wall inner end frameworks 101 and connected to the wall inner end frameworks 101 through door upper plate connecting profiles 20. The door upper plate connecting profiles 20 are respectively adhered and clamped between the door upper plate side edge frameworks 104 and the wall inner end frameworks 101 on the back of the wall plate 1 and the back of the door upper plate 3, and the door upper plate connecting profiles 20 are respectively fixed to the wall inner end frameworks 101 and the door upper plate side edge frameworks 104 through bolts. The door upper plate connecting profiles 20 are used between the door upper plate 3 and the wall plate 1, so as to increase the connection reliability, eliminate the assembly gap therebetween, and avoid the flame directly entering the cab through the gap.

[0037] The door upper plate 3 is provided with an aluminum alloy frame 10, the door plate 2 is provided with an aluminum alloy frame 100, the door upper plate lower end frame 105 is arranged opposite to the door plate upper end frame 106 and is in elastic contact with the door plate upper end frame 106 through the buffer rubber strip 18, the fireproof expansion rubber strips 19 are arranged opposite to each other on the door upper plate lower end frame 105 and the door plate upper end frame 106, and the fireproof expansion rubber strip 19 is arranged opposite to the floor of the cab on the door plate lower end frame 106. The door upper plate lower end frame 105 and the door plate upper end frame 106 form a door gap, the door plate lower end frame 106 and the floor of the cab also form a door gap, the fireproof expansion rubber strip 19 is arranged between the door gaps, the fireproof expansion rubber strip 19 expands by more than 20 times and carbonizes under the condition of high temperature of fire, so as to block the gap between the door gaps and prevent the smoke and fire from entering the cab, and the fireproof expansion rubber strip 19 can effectively prevent the flame and smoke from entering the cab and avoid the fire from jumping when burning at high temperature; the buffer rubber strip 18 meets the buffering and mute requirements between the door upper plate and the wall body.

[0038] The panel 5 and the back plate 6 are both fireproof fiber reinforced resin plates with a density of 1500-2100 kg / m 3 and a thickness of 1-2 mm. 3 The inorganic fireproof core material 8 has a density of 2000±200 kg / m 3 , an A-level fireproof grade and a thickness of 3±0.5 mm. The phenolic foaming core material 9 has a density of 200-300 kg / m The phenolic foaming core material 9 has a thickness of at least three times that of the inorganic fireproof core material 8. Compared with a single layer of thick core material, the inorganic fireproof core material 8 and the phenolic foaming core material 9 form a double-core layer structure, the inorganic fireproof core material 8 increases the fire resistance and is less likely to be burned through under the condition of high-temperature fire, and the inorganic fireproof core material 8 can effectively reduce the thickness of the wall body on the basis of meeting the light weight and fireproof performance requirements of the wall body, meet the compact space arrangement requirements of the cab, improve the surface density of the wall body in the case of reducing the thickness of the wall body, avoid the whole edge covering, and improve the supporting performance and strength of the wall body.

[0039] The design method of the rear end wall of the driver's cab of the rail vehicle is characterized in that: according to the structural fire resistance performance requirements of the rear end wall of the driver's cab of the rail vehicle, the thicknesses of the inorganic fireproof core material 8 and the phenolic foam core material 9 in the double-core layer 7 are adjusted, so that the rear end wall of the driver's cab of the rail vehicle meets the structural fire resistance performance requirements of different grades for 15 minutes to 20 minutes. The design method described above adopts a double-sandwich scheme of "inorganic fireproof core material-phenolic foam core material" for the internal filling part of the end wall plate. Compared with a single layer of thick core material, the inorganic fireproof core material increases the fire resistance performance and is less likely to be burned through under a high-temperature fire. By adjusting the thicknesses of the inorganic fireproof core material and the phenolic foam core material, the structural fire resistance performance requirements of different grades for 15 minutes and 20 minutes can be met, and the light weight and strength requirements are also considered.

[0040] The technical solutions of the embodiments of the present application are completely described above in combination with the drawings. It should be noted that the described embodiments are only a part of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

Claims

1. A rear end wall of a driver's cab of a railway vehicle, comprising wall panels symmetrically arranged on the left and right, a door panel arranged between the wall panels, a door upper panel arranged between the wall panels and above the door panel, and a passage panel vertically fixed to the back of the wall panels to separate a passage inside the driver's cab from an electrical room, the wall panels, the door panel, the door upper panel and the passage panel each comprising a face panel, a back panel and a double core layer bonded between the face panel and the back panel, characterized in that: The double-core layer comprises inorganic fireproof core material and phenolic foam core material bonded with the inorganic fireproof core material, the phenolic foam core material of the wallboard, the doorboard and the door top plate is embedded with aluminum alloy framework, the steel plate is embedded in the corridor plate, the cross section of the aluminum alloy framework is formed by multiple rectangular connections, the steel plate in the corridor plate is fixedly connected with the aluminum alloy framework in the wallboard; The wallboard has a thick area on the side close to the doorboard and a thin area on the side away from the doorboard, the thin area has a thickness 10-15mm smaller than that of the thick area, a transition step surface is formed on the back of the wallboard between the thin area and the thick area, the aluminum alloy framework in the wallboard comprises an inner end framework arranged in the inner end of the thick area and a thickness transition framework arranged at the position of the transition step surface, the thickness transition framework has a step surface corresponding to the transition step surface, the corridor plate is arranged in the thick area and aligned with the thickness transition framework, and a steel plate embedded in the thickness transition framework is parallel to the wallboard; The aluminum alloy framework in the doorboard comprises doorboard side edge frameworks arranged at the left and right ends of the doorboard, the doorboard side edge frameworks are oppositely arranged with the corresponding inner end frameworks, and one end of the doorboard side edge framework is connected with the inner end framework of the wallboard on one side through a hinge, and a steel plate embedded in the doorboard side edge framework and the inner end framework is fixed with the hinge; The aluminum alloy framework in the door top plate comprises door top plate side edge frameworks arranged at the left and right ends of the door top plate, the door top plate side edge frameworks are oppositely arranged with the corresponding inner end frameworks, and the door top plate side edge frameworks are connected with the inner end frameworks through door top plate connecting profiles, the door top plate connecting profiles are respectively attached to the back surfaces of the wallboard and the door top plate and clamped between the door top plate side edge frameworks and the inner end frameworks, and the door top plate connecting profiles are respectively fixed with the inner end frameworks and the door top plate side edge frameworks through bolts; The aluminum alloy framework in the door top plate comprises a door top plate lower end framework arranged at the lower end of the door top plate, and the aluminum alloy framework in the doorboard comprises doorboard end frameworks arranged at the upper end and the lower end of the doorboard respectively.

2. A rail vehicle cab rear end wall according to claim 1, characterized in that: The back surface of the thin area of the wallboard is attached with fireproof and heat insulation felt, and the fireproof and heat insulation felt extends to the outer end surface and the transition step surface of the wallboard, and the outer end surface of the wallboard is sleeved with a U-shaped clamping edge.

3. A rail vehicle cab rear end wall according to claim 2, characterised in that: The back surface of the wallboard at the position of the thickness transition framework is attached with a Z-shaped connecting profile, the Z-shaped connecting profile is attached to the transition step surface and extends to the back surface of the corridor plate, the back surface of the corridor plate is attached with fireproof and heat insulation felt, the steel plate embedded in the corridor plate corresponds to the Z-shaped connecting profile, and the Z-shaped connecting profile is respectively fixed with the steel plate embedded in the corridor plate and the steel plate in the thickness transition framework through bolts.

4. A rail vehicle cab rear end wall according to claim 3, characterised in that: The panel is bonded with the inorganic fireproof core material by inorganic silica gel, and the fireproof and heat insulation felt is bonded to the back surfaces of the wallboard and the corridor plate by inorganic silica gel.

5. A rail vehicle cab rear end wall according to claim 1, characterized in that: The doorboard side edge frameworks and the corresponding inner end frameworks are elastically contacted through buffer rubber strips, and the doorboard side edge frameworks and the corresponding inner end frameworks are respectively attached with oppositely arranged fireproof and expansion rubber strips.

6. A rail vehicle cab rear end wall according to claim 1, characterized in that: The door top plate lower end framework and the doorboard end framework at the upper end of the doorboard are oppositely arranged and elastically contacted through buffer rubber strips, the door top plate lower end framework and the doorboard end framework at the upper end of the doorboard are respectively attached with oppositely arranged fireproof and expansion rubber strips, and the doorboard end framework at the lower end of the doorboard is attached with a fireproof and expansion rubber strip opposite to the floor of the cab.

7. A rail vehicle cab rear end wall according to claim 1, characterized in that: The panel and backboard are fireproof fiber reinforced resin boards with density of 1500-2100 kg / m 3 , thickness of 1-2 mm; the inorganic fireproof core material has density of 2000±200 kg / m 3 , A-level fireproof grade, and thickness of 3±0.5 mm; the phenolic foaming core material has density of 200-300 kg / m 3 , and the thickness of the phenolic foaming core material is at least three times of the inorganic fireproof core material.

8. The method of designing a cab rear end wall of a rail vehicle according to any one of claims 1 to 7, characterized in that: According to the structure fire resistance performance requirement of the rear end wall of the cab of the railway vehicle, the thickness of the inorganic fireproof core material and the phenolic foam core material in the double core layer is adjusted, so that the rear end wall of the cab of the railway vehicle meets the structure fire resistance performance requirement of different grades for 15 minutes to 20 minutes.

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