CN111976763A - Floor structure of railway vehicle - Google Patents

Floor structure of railway vehicle Download PDF

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Publication number
CN111976763A
CN111976763A CN202011008400.9A CN202011008400A CN111976763A CN 111976763 A CN111976763 A CN 111976763A CN 202011008400 A CN202011008400 A CN 202011008400A CN 111976763 A CN111976763 A CN 111976763A
Authority
CN
China
Prior art keywords
floor
vehicle floor
railway vehicle
fire
plastic laminated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011008400.9A
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Chinese (zh)
Inventor
孔维凤
佟年
张术
徐金龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Changchun Railway Vehicles Co Ltd
Original Assignee
CRRC Changchun Railway Vehicles Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CRRC Changchun Railway Vehicles Co Ltd filed Critical CRRC Changchun Railway Vehicles Co Ltd
Priority to CN202011008400.9A priority Critical patent/CN111976763A/en
Publication of CN111976763A publication Critical patent/CN111976763A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
    • B61D17/10—Floors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/06—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
    • B61D17/18—Internal lining, e.g. insulating
    • B61D17/185—Internal lining, e.g. insulating for sound insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/10—Trains

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Building Environments (AREA)

Abstract

The invention discloses a rail vehicle floor structure, comprising: the bottom frame is provided with a wire passing hole for passing a wire; the floor main body is arranged on the underframe and comprises a carbon fiber heat insulation layer and a floor surface layer structure; set up in cross the line hole structure of line trompil department, cross the line hole structure and include sleeve and lower part PLASTIC LAMINATED, telescopic upper end have the overlap joint in the flanging of chassis upper surface, telescopic lower extreme has the inside flanging, the lower part PLASTIC LAMINATED with the inside flanging is connected, the last top surface of lower part PLASTIC LAMINATED reaches telescopic inner wall forms and fills the fire prevention cavity of fire prevention daub, the trompil that the power cable passed has on the lower part PLASTIC LAMINATED. The railway vehicle floor structure provided by the invention improves the fire resistance of the railway vehicle floor structure, so that the fire resistance of the railway vehicle floor structure meets the standard requirement.

Description

Floor structure of railway vehicle
Technical Field
The invention relates to the technical field of floors, in particular to a floor structure of a railway vehicle.
Background
In the test of the original aluminum alloy rail vehicle floor structure sample piece, the sample piece can not be provided with a line hole, so that the fireproof test requirement can be met only by spraying fireproof paint at the bottom of the underframe of the sample piece, paving a heat insulating material on the upper part of the underframe and installing a floor and floor cloth.
However, as customers pay more and more attention to the fire protection requirements of vehicles, in addition to the communication of the on-board and off-board lines of the railway vehicle floor structure, the railway vehicle floor structure with the line holes and the fire resistance meeting the standard requirements (for example, in a fire resistance test of 45 minutes, the integrity, the heat insulation and the deformation of the railway vehicle floor structure meet the requirements) must be scheduled.
Disclosure of Invention
The invention aims to provide a railway vehicle floor structure which improves the fire resistance.
In order to solve the above technical problems, the present invention provides a rail vehicle floor structure, comprising:
the bottom frame is provided with a wire passing hole for passing a wire;
the floor main body is arranged on the underframe and comprises a carbon fiber heat insulation layer and a floor surface layer structure;
set up in cross the line hole structure of line trompil department, cross the line hole structure and include sleeve and lower part PLASTIC LAMINATED, telescopic upper end have the overlap joint in the flanging of chassis upper surface, telescopic lower extreme has the inside flanging, the lower part PLASTIC LAMINATED with the inside flanging is connected, the last top surface of lower part PLASTIC LAMINATED reaches telescopic inner wall forms and fills the fire prevention cavity of fire prevention daub, the trompil that the power cable passed has on the lower part PLASTIC LAMINATED.
Optionally, in the above rail vehicle floor structure, the thickness of the carbon fiber insulation layer is 20mm to 40 mm.
Optionally, in the above rail vehicle floor structure, the floor surface layer structure includes a honeycomb floor layer and a floor cloth, and the honeycomb floor layer is located between the floor cloth and the carbon fiber heat insulation layer.
Optionally, in the above rail vehicle floor structure, the floor main body further includes a sound insulation layer disposed between the floor surface layer structure and the underframe.
Optionally, in the above rail vehicle floor structure, the carbon fiber insulating layer is covered with an aluminum foil adhesive.
Optionally, in the above rail vehicle floor structure, a fireproof paint layer is disposed on a side of the underframe, which is far away from the floor main body.
Optionally, in the above rail vehicle floor structure, a pad beam and a rubber pad are disposed between the underframe and the floor main body.
Optionally, in the above-described rail vehicle floor structure, the lower fire-proof plate is fixed to the inside gusset by a tapping screw.
Optionally, in the above rail vehicle floor structure, the wire passing hole structure further includes an upper fireproof plate, and the upper fireproof plate is fixed at an opening of the fireproof cavity.
Alternatively, in the above-described rail vehicle floor structure, the upper fire-proof plate may be fixed to the inside-out edge by a tapping screw.
According to the rail vehicle floor structure provided by the invention, the carbon fiber heat-insulating layer is arranged on the floor main body, so that the high-temperature-resistant and fire-resistant performance is good on the basis of ensuring the heat-insulating effect; and, cross line hole structure and include sleeve and lower part PLASTIC LAMINATED to, fill fire prevention daub in the fire prevention cavity for fire prevention daub is filled in the space except that the cable in the fire prevention cavity, has further improved the high temperature resistant and fire-resistant effect of crossing line hole department, and then has improved rail vehicle floor structure's fire resistance, makes rail vehicle floor structure's fire resistance satisfy the standard requirement.
Drawings
FIG. 1 is a schematic structural view of a rail vehicle floor structure provided by the present invention;
FIG. 2 is an enlarged view of a portion I of FIG. 1;
fig. 3 is a schematic structural view of the sleeve according to the present invention.
Detailed Description
The core of the invention is to provide a railway vehicle floor structure which improves the fire resistance.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, 2 and 3, an embodiment of the present invention provides a rail vehicle floor structure, which includes a chassis 1, a floor body and a wire hole structure. The underframe 1 is provided with a wire passing hole for passing a wire; the floor main body is arranged on the underframe 1 and comprises a carbon fiber heat-insulating layer 3 and a floor surface layer structure; the line hole structure sets up in crossing line trompil department, crosses the line hole structure and includes sleeve 5 and lower part PLASTIC LAMINATED, and the upper end of sleeve 5 has overlap joint in the flanging 51 of chassis 1 upper surface, and the lower extreme of sleeve 5 has inside flanging 52, and the lower part PLASTIC LAMINATED is connected with inside flanging 52, and the last top surface of lower part PLASTIC LAMINATED and the inner wall of sleeve 5 form the fire prevention cavity of filling the fire prevention daub, have the trompil that the power cable passed on the lower part PLASTIC LAMINATED.
According to the rail vehicle floor structure provided by the embodiment of the invention, the carbon fiber heat-insulating layer 3 is arranged on the floor main body, so that the high-temperature-resistant and fire-resistant performance is good on the basis of ensuring the heat-insulating effect; and, cross line hole structure and include sleeve 5 and lower part PLASTIC LAMINATED to, fill fire prevention daub in the fire prevention cavity, make fire prevention daub fill in the space in the fire prevention cavity except that the cable, further improved the high temperature resistant and fire-resistant effect of crossing line hole department, and then improved rail vehicle floor structure's fire resistance, make rail vehicle floor structure's fire resistance meet the standard requirement.
After the railway vehicle floor structure is assembled, the loading area and the thermocouple arrangement position are selected according to the sample size of the railway vehicle floor structure.
The requirement that the fire resistance meets the standard can be that after a fire resistance test of 45 minutes, the integrity, the heat insulation and the deformation of the floor structure of the railway vehicle meet the requirement. Specifically, the overall fire resistance of the railway vehicle floor structure can not be burnt through within 45 minutes, the average temperature can not exceed 140 ℃, the local maximum temperature can not exceed 180 ℃, the overall deformation of the floor can not exceed 150mm and the like.
The structural strength of undercarriage 1 can withstand AW3 passenger load 410 persons/vehicle (9 persons/square meter) undercarriage. The underframe 1 is preferably an aluminium alloy double-layer hollow underframe section, the thickness of which is preferably 60 mm.
Furthermore, the thickness of the carbon fiber heat-insulating layer 3 is 20mm-40 mm. Preferably, the thickness of the carbon fiber heat-insulating layer 3 is 30 mm. The specific dimensions are not limited and are within the scope of protection.
Preferably, the carbon fiber heat-insulating layer 3 is made of Osaka gas carbon fiber precursor with the model number of RF C900N.
In this embodiment, the floor surface layer structure includes a honeycomb floor layer and a floor cloth, and the honeycomb floor layer is located between the floor cloth and the carbon fiber heat-insulating layer 3. Wherein the honeycomb floor layer is an aluminum honeycomb floor, and the floor cloth is rubber floor cloth.
The thickness of the aluminum honeycomb is preferably 18mm, and the thickness of the rubber floor cloth is preferably 3 mm.
Further, the floor main body also comprises a sound insulation layer 2 arranged between the floor surface layer structure and the underframe 1. The sound insulation layer 2 can be arranged on the top surface of the carbon fiber heat insulation layer 3, and the sound insulation layer 2 can also be arranged on the bottom surface of the carbon fiber heat insulation layer 3. The sound insulation layer 2 may have a thickness of 1mm, or may have other dimensions, such as 1.2mm or 4 mm.
Further, the carbon fiber heat-insulating layer 3 is covered with aluminum foil gum. Through setting up the aluminium foil gum, when making things convenient for carbon fiber heat preservation 3 to arrange, improved the heat preservation effect. Of course, the carbon fiber insulating layer 3 can also be arranged by coating heat-insulating glue.
In the rail vehicle floor structure provided by the embodiment of the invention, a fireproof paint layer is arranged on one surface of the underframe 1, which is far away from the floor main body. Further improving the fire-proof performance. Wherein, the thickness of the fireproof paint layer is preferably 1.9-2.2 mm.
In order to improve the buffering effect and the supporting stability, a pad beam and a rubber pad are arranged between the underframe 1 and the floor main body. Wherein, the backing beam is preferably an aluminum profile backing beam with the thickness of 14 mm. The thickness of the rubber mat is preferably 5 mm.
To facilitate maintenance and replacement of the cable after fire resistance, the lower fire shield is secured to the flange 52 by self-tapping screws. Through setting up self-tapping screw, made things convenient for the installation of lower part PLASTIC LAMINATED, avoided the too big gap of production of screw installation department, improved sealing performance.
In this embodiment, the joint gap between the lower fireproof plate and the sleeve 5 is sealed by a fireproof sealant. Through the sealing of the fireproof sealant, the sealing performance of the fireproof cavity is effectively improved, the leakage of fireproof mortar is avoided, and the fireproof performance is ensured.
In the rail vehicle floor structure provided by the embodiment of the invention, the wire passing hole structure further comprises an upper fireproof plate, and the upper fireproof plate is fixed at the opening of the fireproof cavity. Wherein the upper fireproof plate is also fixed by self-tapping screws. That is, the upper fire shield is fixed to the burring 51 by tapping screws. Through the arrangement, the disassembly and assembly operation of the wire passing hole structure is facilitated, the subsequent operation of cable replacement is facilitated, and the maintenance is avoided.
And, the joint seam of the upper fireproof plate and the sleeve 5 is also sealed by fireproof sealant.
The rail vehicle floor structure provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. A rail vehicle floor structure, comprising:
the base frame (1), the base frame (1) is provided with a wire passing hole for passing a wire;
the floor main body is arranged on the underframe (1) and comprises a carbon fiber heat-insulating layer (3) and a floor surface layer structure;
set up in cross line hole structure of line trompil department, cross line hole structure and include sleeve (5) and lower part PLASTIC LAMINATED, the upper end of sleeve (5) have the overlap joint in chassis (1) upper surface's flanging (51), the lower extreme of sleeve (5) has inside flanging (52), the lower part PLASTIC LAMINATED with inside flanging (52) are connected, the last top surface of lower part PLASTIC LAMINATED reaches the inner wall of sleeve (5) forms and fills the fire prevention cavity of fire prevention daub, the trompil that has the power supply cable to pass on the PLASTIC LAMINATED of lower part.
2. Railway vehicle floor structure according to claim 1, characterized in that the thickness of the carbon fibre insulation layer (3) is 20-40 mm.
3. Railway vehicle floor structure according to claim 1, characterized in that the floor skin structure comprises a honeycomb floor layer and a floor cloth, the honeycomb floor layer being located between the floor cloth and the carbon fiber insulation layer (3).
4. Railway vehicle floor structure according to claim 1, characterized in that the floor body further comprises a sound insulation layer (2) arranged between the floor skin structure and the underframe (1).
5. The rail vehicle floor structure according to claim 1, characterized in that the carbon fiber insulation layer (3) is covered with an aluminum foil backing adhesive.
6. Railway vehicle floor construction according to claim 1, characterized in that the side of the underframe (1) remote from the floor body is provided with a layer of fire-retardant lacquer.
7. Railway vehicle floor construction according to claim 1, characterized in that a pad beam and a rubber pad are arranged between the underframe (1) and the floor body.
8. The rail vehicle floor structure according to claim 1, wherein the lower fire shield is fixed to the inside flange (52) by a self-tapping screw.
9. The rail vehicle flooring structure of any of claims 1 to 8, wherein the wire passing hole structure further comprises an upper fire shield plate fixed to the opening of the fire-protected cavity.
10. The rail vehicle floor structure according to claim 9, wherein the upper fire shield is fixed to the burring (51) by a tapping screw.
CN202011008400.9A 2020-09-23 2020-09-23 Floor structure of railway vehicle Pending CN111976763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011008400.9A CN111976763A (en) 2020-09-23 2020-09-23 Floor structure of railway vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011008400.9A CN111976763A (en) 2020-09-23 2020-09-23 Floor structure of railway vehicle

Publications (1)

Publication Number Publication Date
CN111976763A true CN111976763A (en) 2020-11-24

Family

ID=73450917

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011008400.9A Pending CN111976763A (en) 2020-09-23 2020-09-23 Floor structure of railway vehicle

Country Status (1)

Country Link
CN (1) CN111976763A (en)

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