CN115230764A

CN115230764A - Rail vehicle body structure and waterproof sealing method thereof

Info

Publication number: CN115230764A
Application number: CN202210891283.8A
Authority: CN
Inventors: 金希红; 苏柯; 陈希; 水文菲; 韩方杰; 王赵华; 张海波; 汤月
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-10-25
Anticipated expiration: 2042-07-27
Also published as: CN115230764B; WO2024021423A1

Abstract

The invention discloses a railway vehicle body structure and a waterproof sealing method thereof. The vehicle body structure comprises a vehicle roof, side walls, end walls and an underframe; the roof comprises an arc roof, a return air inlet and a roof side beam; the side wall comprises an upright post and a side wall plate; the end wall comprises an upper wall plate, an end wall plate and an equipment mounting hole; the underframe comprises an underframe floor, end beams, underframe edge beams, a drainage ditch structure, a door corner sealing plate and a plugging piece; the cavity of the roof, the side walls, the end walls and the underframe forms a plurality of drainage channels, and the drainage channels and the drainage holes form condensed water drainage channels; and drainage ditch structures are arranged at four corner parts of the floor of the underframe, and the drainage ditch structures and drainage holes positioned near an air conditioner air return inlet and a window in the condensed water drainage channel form an on-vehicle quick drainage channel. The invention can quickly discharge accumulated water and simultaneously ensure the air tightness of the vehicle.

Description

Rail vehicle body structure and waterproof sealing method thereof

Technical Field

The invention relates to a railway vehicle body structure and a waterproof sealing method thereof, belonging to the field of railway vehicles.

Background

At present, the aluminum alloy vehicle body of the railway vehicle mainly comprises parts such as an underframe, a roof, side walls, end walls and the like which are welded together by adopting a hollow profile structure. And due to the existence of an air conditioner air inlet, a door and window, a threading hole, an equipment mounting hole and the like, the hollow section bars cannot enable the cavity to form a completely closed structure. Deposit in the open of automobile body manufacturing transportation, the vehicle test process of drenching with the rain to and the comdenstion water that the inside and outside temperature difference of train operation in-process produced, all probably lead to rail vehicle's the inside ponding of leaving over of automobile body die cavity.

In addition, the inside of the train can adopt a water spraying cleaning mode in the daily cleaning process, the water quantity is large, and sometimes the water enters the floor of the train body from the gaps at the periphery of the built-in aluminum honeycomb floor and the screen cabinet. If the accumulated water in the cavities can not be discharged smoothly, the corrosion of the parent metal and the welding line of the vehicle body can be caused inevitably, the leakage in a passenger room can be caused, even the frost crack of the vehicle body can be caused under the cold condition, the strength of the vehicle is seriously influenced, and the driving safety is further endangered. When the drainage device is maintained, time and labor are consumed, the drainage device is extremely inconvenient, the drainage quality is high and low, the quality, the cost and the period of the whole vehicle can be directly influenced, and the drainage device is one of the non-negligible links in the design process of a vehicle body.

Aiming at the problem of water drainage in the cavity, the scheme provided by the Chinese patent applications CN201811519888.4 and CN202022185938.9 is that drainage grooves which are mutually communicated are arranged in the inner parts of the bottom frame, the side wall, the end wall and the roof of the vehicle body, and finally accumulated water in the cavity is drained to the lower part of the vehicle. However, only a drainage path inside the cavity is arranged, and the drainage path is too long, so that when the vehicle is stored in the open before equipment is completely installed in the vehicle manufacturing process and meets with large rainwater, water can flow into the cavity from positions such as an air conditioner air supply return port, a door window and an equipment installation hole, and water is possibly accumulated in a plurality of positions of the vehicle body, so that the risk of corrosion is caused inside the vehicle body. In addition, if the drainage channel is not effectively plugged, the air tightness of the vehicle body is seriously affected.

In order to solve the problem of water flowing around in the cavity, patent CN202110342947.0 sets special drainage mechanisms at the roof, side walls, underframe, etc. to drain the accumulated water in the cavity of each part of the car body independently, and sets a drainage component on the underframe floor to drain the accumulated water above the floor to the underside of the car. However, the scheme has the advantages of complex structure, high cost, manual operation for drainage at every time, inconvenience, and incapability of effectively avoiding the problem that accumulated water above the floor in the vehicle often flows into a junction box under the vehicle through a threading hole in the floor of the underframe, so that the problems of short circuit, damage and other huge safety risks are brought to electrical equipment.

Disclosure of Invention

The invention aims to provide a railway vehicle body structure and a waterproof sealing method thereof, which can at least solve one of the following problems:

1) When daily washing in the train, water may invade the screen cabinets at four corners of the carriage, resulting in accumulated water in the floor of the train body, and the accumulated water flows to the interior of the junction box under the train from the train along the threading holes or the cables, so that great safety risks such as short circuit and damage are brought to the electrical equipment.

2) Part existing scheme automobile body has only set up the die cavity route of draining, and the rainwater is sent back the position such as wind gap, door and window, equipment fixing hole from the air conditioner and is got into the automobile body die cavity after, long path, large tracts of land are flowed and are scurried, increase the automobile body structure and are corroded the risk.

3) The special drainage mechanism structure of existing floor is complicated, and some still need use the motor to control, has increased the vehicle fault incidence, has increased the train cost.

4) Accumulated water in the cavity cannot be discharged smoothly, the water can leak in a passenger room and even can freeze under the cold condition, and the automobile body is frost crack after the volume expansion.

5) Improper arrangement of the drainage channel can bring negative effects to the air tightness of the train.

In order to achieve the purpose, the invention adopts the technical scheme that:

a rail vehicle body structure comprises a roof, side walls, end walls and an underframe; the roof comprises an arc top, a wind returning port and a roof side beam;

the side wall comprises an upright post and a side wall plate; the end wall comprises an upper wall plate and an end wall plate, and equipment mounting holes for mounting the through passage are formed in the outer sides of the upper wall plate and the end wall plate;

the underframe comprises an underframe floor, end beams, underframe edge beams, drainage ditch structures, door corner sealing plates and plugging pieces; the door corner sealing plate is arranged at a door corner position; the drainage ditch structure is arranged on the floor of the underframe and is positioned in the screen cabinet;

the roof, the side walls, the end walls and the underframe all adopt hollow profile structures, and the connecting parts of the roof, the side walls, the end walls and the underframe are provided with drain holes which enable cavities of the roof, the side walls, the end walls and the underframe to be communicated with each other;

the cavity of the roof, the side walls, the end walls and the underframe forms a plurality of drainage channels, and the drainage channels and the drainage holes form condensed water drainage channels;

four corner parts of the floor of the underframe are provided with drainage ditch structures, and the drainage ditch structures and drainage holes positioned near an air conditioner air return inlet and a window in a condensed water drainage channel form an on-vehicle quick drainage channel;

the cavity drainage channels of the arc top, the side wall plate, the upper wall plate and the end wall plate are shared channels of a quick drainage channel and a condensed water drainage channel on the vehicle;

the detachable plugging piece is arranged at the drain hole on the lower surface of the chassis of the quick drain channel and the condensed water drain channel on the vehicle.

Therefore, the roof, the side wall, the end wall and the underframe of the vehicle body all adopt hollow section structures, the connecting parts of the large parts are provided with drain holes, so that the cavities of the roof, the side wall, the end wall and the underframe are communicated with one another, and the cavities in the large parts form a plurality of drain channels to form special drainage for cavity condensate water, and the special drainage is mainly used for draining the condensate water generated on the inner walls of the cavities by the temperature difference between the inside and the outside of the vehicle.

The drainage method comprises the steps of selecting appropriate positions including an air conditioner return air inlet, a window and the like of a vehicle body on a condensate water drainage channel to be provided with drainage holes, arranging a drainage ditch structure on a floor of a chassis to form a quick drainage channel, quickly draining rainwater and water for a rain test which accidentally enter into the vehicle from the drainage holes at a water inlet part, then flowing into a floor drainage ditch from the upper surface of the floor, and further draining the rainwater and the water under the vehicle.

The invention arranges the drainage channel in the car at the car top, side wall, end wall and bottom frame, which comprises the fast drainage channel and the condensed water drainage channel.

According to the embodiment of the invention, the invention can be further optimized, and the following is the technical scheme formed after optimization:

in one preferred embodiment, the drainage ditch structure comprises a plurality of layers of drainage profiles and at least one layer of partition plate, and a plurality of drainage holes are formed in the partition plate; preferably, the drainage section bar is formed by extruding a hollow section bar and is provided with an annular outer plate and an annular inner plate, a plurality of connecting ribs are arranged between the outer plate and the inner plate, the inner plate is higher than the outer plate, and a lower groove with a height lower than that of the outer plate is arranged above the connecting ribs.

In one preferred embodiment, a junction box is arranged below the floor of the underframe and corresponds to the drainage ditch structure; the upper surface of the outer layer plate of the drainage ditch structure is not higher than the upper surface of the underframe floor, and the upper surface of the inner layer plate is higher than the upper surface of the underframe floor; when water is accumulated above the floor of the underframe, the water in the screen cabinet flows into the outer layer plate and enters the drainage ditch structure, and the water cannot flow into the wire passing hole defined by the inner layer plate under the obstruction of the groove;

after water enters between the outer layer plate and the inner layer plate of the drainage ditch structure, the water flows downwards from the drainage hole of the partition plate, a drainage pipe is arranged at the drainage hole of the partition plate at the bottom layer, the water is drained out of the junction box, and the whole drainage path forms a quick drainage channel of the chassis floor;

preferably, a water valve is arranged on the drain pipe.

In one preferred embodiment, the floor is isolated from the periphery of the connecting part of the wire through hole by a concave drainage ditch, the drainage ditch structure is provided with at least one layer of horizontal partition plate, and the drainage pipe is S-shaped; preferably, the upper part and the lower part of the bent part of the drain pipe are respectively provided with a section of water column, and the heights of the two sections of water columns are not lower than 300mm.

In one preferred embodiment, a drain hole of the drain structure is positioned outside the junction box, and a water valve is directly installed at the drain hole; after water enters between the outer layer plate and the inner layer plate of the drainage ditch structure, the water flows downwards from the drainage hole of the partition plate and is discharged out of the vehicle through the water valve, and the whole drainage path forms a quick drainage channel of the chassis floor.

In one preferred embodiment, the condensate drain channel includes two main drain paths:

i. arc top → upper wallboard → end beam → under vehicle;

ii, roof side rail → pillar and side wall panel → underframe side rail → under car.

In one preferred embodiment, the air return inlet is rectangular, the transverse direction of the air return inlet is in contact with a straight rib plate, the straight rib plate is used for preventing water from flowing towards two sides, drain holes are formed in four corners of the air return inlet, and water flowing into the arc top can be drained out of the cavity through the drain holes of the quick drain channel.

In one preferred embodiment, the direction of the column cavity of the side wall is the vertical direction, water in the column cavity enters the edge beam of the bottom frame from the edge beam water inlet, flows from the cavity inside the edge beam of the bottom frame to the front end and the rear end, then flows downwards from the drainage grooves at the two ends, and finally is discharged out of the vehicle from the lower surface of the edge beam of the bottom frame.

In one preferred embodiment, water in the side wall plate flows to the side wall plate gaps at the front end and the rear end and is discharged from top to bottom, and the water is preferentially discharged to the under frame in the vehicle from the stand column water discharge hole of the rapid water discharge channel on the vehicle under the blocking of the outer wall of the stand column; after the quick drainage channel on the train is sealed by glue, condensed water generated in the operation process of the train flows into the cavity of the upright post from the gap of the outer wall and is discharged from the water inlet of the boundary beam.

In one preferred embodiment, the upper surface of the end beam is provided with an end beam water inlet for discharging water in the cavity of the end wallboard, and the water passes through the groove of the rib plate of the cavity and then flows to the end beam water outlet to be discharged under the vehicle; the upper surface of the side beam of the underframe is provided with a side beam water inlet used for discharging water in the upright post, and the water passes through the grooves or gaps at the two ends of the side beam and is discharged to the lower part of the car through the side beam water outlet.

In a preferred embodiment, the cabinet is provided with a screen cabinet for mounting an electrical equipment system above the underframe floor at four corners of the carriage of the vehicle body, the side surfaces of the screen cabinet are respectively adjacent to the side wall and the end wall, a drainage ditch structure is arranged below the screen cabinet, and water entering the inner area of the screen cabinet from glue seams at the connecting parts of the screen cabinet and the underframe floor, the end beams, the underframe side beams and the like is drained to the lower part of the vehicle through the drainage ditch structure.

Based on the same inventive concept, the invention also provides a waterproof sealing method of the rail vehicle body structure, which comprises the following steps:

after the vehicle body is provided with equipment, a rain test is carried out, and the water tightness of the rail vehicle meets the requirement, the upper part of the rapid drainage channel is permanently blocked, and only a drainage ditch structure of the underframe floor is reserved for discharging accidental water inflow in the daily cleaning process of the interior of the train; the drain holes on the lower surfaces of the side beam and the end beam of the chassis of the condensed water drain channel are sealed by adopting detachable plugging pieces, and the drain water is opened at certain intervals or when needed, and then is plugged and sealed again.

The invention arranges 'river protection' drainage ditch structures at four corners of the underframe floor, wherein the drainage ditch structure comprises a drainage profile, a partition plate and a drainage pipe. The floor is kept apart by recessed escape canal with crossing wire hole connection position periphery, and the escape canal structure sets up at least one deck horizontal direction baffle for the automobile body is sealed and the sound insulation, sets up the drain pipe of S type in bottom baffle below, when there is certain atmospheric pressure difference inside and outside the car, has kept the water column in the drain pipe always, carries out self sealss to drainage channel.

The drainage section is formed by extruding a hollow section and is provided with an inner layer annular plate and an outer layer annular plate, a plurality of connecting ribs are arranged between the two layers of plates, the inner layer plate is higher than the outer layer plate through machining, and a lower concave notch with the height lower than that of the outer layer plate is machined above the connecting ribs.

The drain hole on the lower surface of the chassis of the condensed water drain channel is provided with a detachable plugging piece.

The specific sealing method comprises the following steps:

after the train body is provided with equipment and a rain test is finished, after the water tightness of the train is determined to meet the requirement, the upper part of the rapid drainage channel is permanently plugged by glue and the like, only the underframe floor drainage ditch structure is reserved and is used for discharging accidental water inflow in the daily cleaning process of the interior of the train, the S-shaped drainage pipe is used for self-sealing, a redundant closing valve is arranged at the position of the drainage pipe, and the S-shaped drainage pipe is closed when no water exists in the S-shaped drainage pipe.

The drain holes on the lower surfaces of the side beam and the end beam of the chassis of the condensed water drain channel are sealed by adopting detachable plugging pieces. The water is opened at certain intervals or when needed, and then the sealing is sealed again.

Compared with the prior art, the invention has the beneficial effects that:

1) The invention solves the problem of water accumulation in the screen cabinets positioned at four corners of the carriage, thoroughly eliminates the problem that water on the floor flows into the distribution box under the carriage from the upper part of the carriage along the threading holes or the cables, and solves the problem of huge safety risks such as short circuit and damage caused by water leakage to electrical equipment.

2) According to the invention, by arranging the quick drainage channel, long-path and large-area flowing and fleeing of rainwater after the rainwater enters the cavity of the vehicle body from the air conditioner air inlet, the door and window, the equipment mounting hole and other parts is avoided, and the corrosion risk of water to the cavity is effectively relieved.

3) The invention avoids using a special drainage mechanism with a complex structure by arranging the 'river-protecting' drainage ditch structure and the S-shaped drainage pipe, reduces the occurrence rate of vehicle faults and has low cost.

4) The invention ensures that water can be discharged out of the vehicle in time by arranging the double channels for discharging water in the vehicle, and solves the problem of frost cracking of the vehicle body caused by water accumulation in the cavity.

5) The permanent shutoff of quick drainage channel car upper portion before the train is delivered carries out detachable shutoff with comdenstion water drainage channel, utilizes S type drainage route to carry out the self-plugging to the escape canal structure, effectively avoids drainage channel to bring negative effects for the train gas tightness.

Drawings

FIG. 1: a cross-sectional view of a vehicle body according to an embodiment of the present invention;

FIG. 2 is a schematic diagram: the vehicle body structure of one embodiment of the invention is shown schematically;

FIG. 3: the invention discloses a schematic diagram of a partial structure of a vehicle roof;

FIG. 4: the partial structure schematic diagram of the air return port of one embodiment of the invention;

FIG. 5: enlarged view ii in fig. 2;

FIG. 6: the side wall and underframe drainage channel schematic diagram of one embodiment of the invention;

FIG. 7: the end beam drainage channel of one embodiment of the invention is shown schematically;

FIG. 8: the structural schematic diagram of the chassis cavity drainage outlet of one embodiment of the invention;

FIG. 9: the vehicle body part structure schematic diagram of one embodiment of the invention;

FIG. 10: the drainage ditch structure of one embodiment of the invention is shown schematically;

FIG. 11: view a of fig. 10;

FIG. 12: FIG. 1 is an enlarged view I;

FIG. 13 is a schematic view of: a schematic illustration of another embodiment of the floor drain of the present invention.

In the figure

The roof comprises a roof 1, a circular arc roof 11, a water discharge hole 11a, a straight rib plate 111, a return air inlet 12, a roof side beam 13, a side wall 2, a side window 2a, a column 21, an outer wall 21a, a column water discharge hole 21b, a side wall plate 22, a side wall plate notch 22a, an end wall 3, an equipment installation hole 3a, an upper wall plate 31, an end wall plate 32, a bottom frame 4, a bottom frame floor 41, an end beam 42, an end beam water inlet 42a, an end beam water outlet 42b, a groove 42c, a bottom frame side beam 43, a side beam water inlet 43a, a side beam water outlet 43b, a door corner 43c, a drainage ditch structure 44, a multi-layer drainage profile 441, a groove 441a, an outer plate 4411, an inner plate 4412, a connecting rib 4413, a partition 442, a water discharge hole 442a, a door corner closing plate 45, a plugging piece 46, a junction box 5, a cable 51, a drainage pipe 52, a water valve 53 and a screen cabinet 6.

The system comprises external water W, an on-vehicle quick drainage channel A, a chassis floor quick drainage channel A1 and a condensed water drainage channel B.

The height of the water column is one h1, and the height of the water column is two h2.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

The embodiment describes a body structure of a subway vehicle, and a body section and the body structure of the subway vehicle are respectively shown in fig. 1 and fig. 2. Specifically, the metro vehicle comprises a vehicle body structure, a junction box 5 and a screen cabinet 6, wherein the vehicle body structure mainly comprises a roof 1, a side wall 2, an end wall 3, an underframe 4 and other parts. The roof 1 comprises a circular arc roof 11, a return air inlet 12 and a roof side beam 13. The side wall 2 includes a pillar 21 and a side wall 22. The end wall 3 comprises an upper wall plate 31 and an end wall plate 32, and equipment mounting holes 3a are formed in the outer sides of the upper wall plate 31 and the end wall plate 32 and used for mounting through passages and other equipment. The undercarriage 4 includes an undercarriage floor 41, end beams 42, undercarriage edge beams 43, gutter structure 44, door angle closure 45 and closure 46.

The roof 1, the side wall 2, the end wall 3 and the underframe 4 are all of hollow section bar structures, notches are processed at two ends of the section bars and communicated with a cavity of the section bars, and a condensed water drainage channel B which is connected with each other is formed and used for draining condensed water generated in the cavity due to the temperature difference between the inside and the outside of the train in the operation process of the train. The condensed water drainage channel A comprises two main paths which are respectively: arc top 11 → upper wall panel 31 → end wall panel 32 → end beam 42 → under the vehicle; roof side rail 13 → pillar 21 and side wall panel 22 → underframe side rail 43 → under the car. The drain holes on the lower surfaces of the side beams and the end beams of the underframe are sealed by adopting detachable plugging pieces 46. When the train operates, the water is opened at certain intervals or when other needs are needed, and then the sealing is sealed again.

The drainage holes are arranged near the positions of the openings communicated with the outside of the vehicle, such as an air conditioner, a vehicle window and the like, so that an originally closed and long condensate drainage channel B is cut off to form an on-vehicle quick drainage channel A, when a vehicle body is stored outdoors or the cavity accidentally enters water in a rain test, the cavity at the joint of the circular arc top 11 and the air return port 12, the cavity at the joint of the upright post 21 and the side wall plate 22, the cavity at the joint of the upper wall plate 31 and the end wall plate 32 drains water, the water is directly drained to the outside of the vehicle or to the bottom frame floor 41, and then passes through the quick drainage channel A1 of the bottom frame floor, so that the accumulated water in the vehicle is quickly drained to the outside of the vehicle. Through quick drainage channel, avoided the rainwater to send back positions such as wind gap, door and window, equipment fixing hole from the air conditioner after getting into the automobile body die cavity, long path, large tracts of land are flowed and are scurried, effectively alleviate the corruption risk that water brought the die cavity.

In the vehicle trial production and test stage, the chassis floor rapid drainage channel A1 and the vehicle rapid drainage channel A form a vehicle body rapid drainage channel together. After the train body is provided with equipment and a rain test is carried out, and after the train body is determined that the water tightness of the train meets the requirements, the upper part of the rapid drainage channel is permanently plugged by glue and the like, and only the rapid drainage channel A1 of the underframe floor is reserved and is used for discharging accidental water inflow in the daily cleaning process of the interior of the train.

The parts such as the underframe floor 41 at the air conditioner installation interface part, the equipment installation hole 3a for equipment installation such as a through passage and the like, and the parts such as the side window 2a for passenger room window installation are in an open state before equipment installation and sealing, so that the possibility of accidental water inflow exists, and therefore, the cavity drainage channels at the parts such as the arc top 11, the side wall plate 22, the upper wall plate 31, the end wall plate 32 and the like belong to a shared channel of an on-vehicle quick drainage channel A and a condensed water drainage channel B.

Fig. 3 is a partial structural view of the roof, and fig. 4 is a partial structural view of the return air inlet. The vehicle roof 1 comprises a circular arc roof 11 and a return air inlet 12 structure. The air return inlet 12 is rectangular, and is contacted with the straight rib plate 111 in the transverse direction, the straight rib plate 111 is used for preventing water from flowing to two sides, drain holes 11a are arranged at four corner positions of the air return inlet 12, and when the weld positions of the air return inlet 12 and the arc top 11 are defective and leak, the water flowing into the arc top 11 is quickly discharged out of a cavity from the drain holes 11a of the quick drainage channel A on the vehicle.

Fig. 5 is an enlarged view ii of fig. 2, showing a connection structure of the dome and the end wall upper panel,

in the train operation stage, if condensate water is generated in the arc top 11, the condensate water flows from the front end and the rear end of the inner part of the cavity of the arc top 11 and is discharged into the cavity of the upper wall plate 31 of the end wall 3, and the water which accidentally enters the cavity of the upper wall plate 31 from the equipment mounting hole 3a and the condensate water in the end wall 3 are discharged downwards from the cavity in the end wall 3 and the gaps at the two ends under the action of gravity.

FIG. 6 is a schematic view of the sidewall and undercarriage drainage channels. The cavity direction of the upright post 21 of the side wall 2 is the up-down direction, and water in the cavity is directly discharged from top to bottom under the action of gravity and enters the side beam 43 of the bottom frame from the side beam water inlet 43 a. Because the door corner 43c of the underframe boundary beam 43 belongs to an exposed surface and influences the appearance, the door corner sealing plate 45 is arranged at the position of the door corner 43c, water cannot flow out of a cavity of the door corner 43c, only can flow from the cavity inside the underframe boundary beam 43 to the front end and the rear end, then flows downwards from the drainage grooves at the two ends, and finally is discharged out of the car from the lower surface of the underframe boundary beam 43.

The water in the side wall plate 22 flows to the side wall plate notches 22a at the front and rear ends and is discharged from top to bottom. The water is preferentially drained from the pillar drain hole 21b of the on-vehicle quick drain passage a to the under-vehicle frame, blocked by the outer wall 21a of the pillar 21. After the quick drainage channel A on the train is sealed by glue, condensed water generated in the operation process of the train flows into the cavity of the upright post 21 from the gap of the outer wall 21a and is discharged from the water inlet 43a of the boundary beam.

Fig. 7 is a schematic view of an end beam drainage channel, and fig. 8 is a schematic view of a chassis cavity drainage outlet structure. The upper surface of the end beam 42 is provided with an end beam water inlet 42a for discharging water in the cavity of the end wall plate 32, and the water passes through the groove 42c of the cavity rib plate and then flows to an end beam water outlet 42b to be discharged under the vehicle. The upper surface of the underframe boundary beam 43 is provided with a boundary beam water inlet 43a for discharging water in the upright post 21, and the water passes through the grooves or gaps at the two ends of the boundary beam and is discharged to the underside of the car through a boundary beam water outlet 43 b.

Fig. 9 is a partial structural view of the vehicle body. The screen cabinets 6 for installing the electrical equipment system are arranged above the underframe floors 41 at the four corners of the carriage, the side surfaces of the screen cabinets 6 are respectively adjacent to the side walls 2 and the end walls 3, and drainage ditch structures 44 are arranged below the screen cabinets 6. When the train is washed in daily life, water may enter the inner area of the screen cabinet 6 through glue seams at the connecting parts of the screen cabinet 6, the chassis floor 41, the end beams 42, the chassis side beams 43 and the like, and then the water is drained to the lower part of the train through the drainage ditch structure 44.

Fig. 10 is a schematic view of a drain structure, and fig. 11 is a view taken along direction a of fig. 10. The drainage channel structure 44 is composed of a plurality of layers of drainage profiles 441 and at least one layer of a partition 442. The multi-layer drainage profile 441 is formed by extruding a hollow profile and is provided with an outer layer plate 4411, an inner layer plate 4412 is provided with at least two layers of annular plates, a plurality of connecting ribs 4413 are arranged between the two layers of annular plates, the inner layer plate 4412 is higher than the outer layer plate 4411 through machining, and a groove 441a with the height lower than that of the outer layer plate is machined above the connecting ribs 4413. The partition 442 is provided with a plurality of drainage holes 442a, and the drainage structure 44 may be provided with one, two or more partitions 442 according to the requirements of sound insulation, fire protection, etc. Preferably, the drainage structure 44 is generally "river-protected".

Fig. 12 is an enlarged view i of fig. 1. The drainage ditch structure 44 is arranged on the underframe floor 41, a junction box 5 is arranged in the cabinet 6 and at the position corresponding to the drainage ditch structure 44 under the underframe floor. The drain structure 44 has an outer plate 4411 whose upper surface is not higher than the upper surface of the floor base 41, and an inner plate 4412 whose upper surface is higher than the upper surface of the floor base 41. When there is ponding above the underframe floor 41, under the action of train operation acceleration and deceleration and gravity, the inside water of screen cabinet 6 can flow into outer plywood 4411, gets into escape canal structure 44, and under the separation of recess 441a, water can not flow into the line hole of crossing that inner plywood 4412 encloses, consequently can keep the inside no ponding that can exist of screen cabinet, and water can not also get into junction box 5 along the cable 51 of inner plywood 4412 intracavity to the huge safety risk problems such as short circuit, damage have been brought for electrical equipment to the solution leaks.

The water enters between the outer plate 4411 and the inner plate 4412 of the drain structure 44, and then flows downward through the drain holes 442a of the partition 442. The drain pipe 52 is installed at the drain hole 442a of the sub-floor 442 to drain water out of the junction box 5, and the entire drain path constitutes the under-floor rapid drain passage A1.

The water discharge pipe 52 is formed in an S-shape in the distribution box 5, and a certain height is respectively reserved above and below the point T, corresponding to the water column height one h1 and the water column height two h2. Considering that the total length of the air pressure difference between the interior and the exterior of the subway train in the operation process cannot exceed 3000Pa, the water column height I h1 and the water column height II h2 are not set to be lower than 300mm, so that the water can not flow out completely under the action of the air pressure difference when the water drainage pipe 52 has the water column, a self-sealing effect is achieved, gas can not enter the train through the water drainage pipe 52, and therefore the water in the train is not drained, the drainage ditch structure 44 can continuously drain water, and meanwhile train operation is not affected.

When the interior of the train is not washed for a long time and the water accumulation in the water drainage pipe 52 is not carried out or is low, the water drainage channel can be closed through the water valve 53 so as to keep the air tightness of the train.

An alternative to the S-shaped drain 52 of fig. 12 draining water from the distribution box 5 is: as shown in fig. 13, the drain hole 442a of the drain structure 44 is located outside the distribution box 5, and the water valve 53 is directly mounted on the drain hole 442 a.

After entering between the outer plate 4411 and the inner plate 4412 of the drain structure 44, the water flows down through the water discharge hole 442a of the partition 442, and is discharged to the outside of the vehicle through the water valve 53. The whole drainage path constitutes the chassis floor quick drainage channel A1.

After the train is flushed inside or after a set period of operation, the water valve 53 is opened to drain the accumulated water in the drainage ditch structure 44, and then the water valve 53 is closed to maintain the train airtight.

The above-described embodiments are set forth so that this disclosure will be thorough and complete, and will not be limited by any theory presented in the preceding claims, which may suggest themselves to those skilled in the art after reading this disclosure and all equivalents thereof that fall within the scope of the invention as defined in the claims appended hereto.

Claims

1. A rail vehicle body structure comprises a roof (1), side walls (2), end walls (3) and an underframe (4);

the roof (1) comprises an arc roof (11), a return air inlet (12) and a roof side beam (13); the side wall (2) comprises a column (21) and a side wall plate (22); the end wall (3) comprises an upper wall plate (31) and an end wall plate (32), and equipment mounting holes (3 a) for mounting the through passages are formed in the outer sides of the upper wall plate (31) and the end wall plate (32); the method is characterized in that:

the underframe (4) comprises an underframe floor (41), an end beam (42), an underframe edge beam (43), a drainage ditch structure (44), a door corner sealing plate (45) and a plugging piece (46); the door corner sealing plate (45) is arranged at a door corner (43 c); the drainage ditch structure (44) is arranged on the underframe floor (41) and is positioned inside the screen cabinet (6);

the roof (1), the side walls (2), the end walls (3) and the bottom frame (4) are all of hollow section bar structures, drain holes are formed in the connecting parts of the roof (1), the side walls (2), the end walls (3) and the bottom frame (4), and the drain holes enable cavities of the roof (1), the side walls (2), the end walls (3) and the bottom frame (4) to be communicated with one another;

the cavity of the roof (1), the side wall (2), the end wall (3) and the chassis (4) forms a plurality of drainage channels, and the drainage channels and the drainage holes form a condensed water drainage channel (B);

four corner parts of the floor of the underframe (4) are provided with drainage ditch structures (44), and the drainage ditch structures (44) and drainage holes positioned near an air conditioner air return inlet and a window in a condensed water drainage channel (B) form an on-vehicle quick drainage channel (A);

the cavity drainage channels of the arc top (11), the side wall plate (22), the upper wall plate (31) and the end wall plate (32) are shared channels of a quick drainage channel (A) and a condensed water drainage channel (B) on the vehicle; the detachable plugging piece (46) is arranged at the drain hole on the lower surface of the chassis of the quick drain channel (A) and the condensed water drain channel (B) on the vehicle.

2. The rail vehicle body structure according to claim 1, wherein the drainage structure (44) comprises a multi-layer drainage profile (441) and at least one layer of partition (442), and a plurality of drainage holes (442 a) are formed in the partition (442); preferably, the drainage profile (441) is formed by extruding a hollow profile and is provided with an annular outer layer plate (4411) and an annular inner layer plate (4412), a plurality of connecting ribs (4413) are arranged between the outer layer plate (4411) and the inner layer plate (4412), the inner layer plate (4412) is higher than the outer layer plate (4411), and a lower groove (441 a) with the height lower than that of the outer layer plate (4411) is arranged above the connecting ribs (4413).

3. The rail vehicle body structure according to claim 2, wherein a junction box (5) is installed below the underframe floor (41) at a position corresponding to the drainage ditch structure (44); the upper surface of an outer layer plate (4411) of the drainage ditch structure (44) is not higher than the upper surface of the underframe floor (41), and the upper surface of an inner layer plate (4412) is higher than the upper surface of the underframe floor (41); when water is accumulated above the underframe floor (41), the water in the cabinet (6) flows into the outer layer plate (4411) and enters the drainage ditch structure (44), and the water cannot flow into the wire passing hole surrounded by the inner layer plate (4412) under the obstruction of the groove (441 a);

after entering between the outer plate (4411) and the inner plate (4412) of the drainage ditch structure (44), water flows downwards from the drainage hole (442 a) of the partition plate (442), a drainage pipe (52) is installed at the drainage hole (442 a) of the partition plate (442) at the bottom layer, the water is drained out of the junction box (5), and the whole drainage path forms a quick drainage channel (A1) of the chassis floor;

preferably, a water valve (53) is arranged on the drain pipe (52).

4. The rail vehicle body structure according to claim 3, wherein the floor is isolated from the junction of the wire through holes at the periphery by a recessed drain, the drain structure is provided with at least one horizontal partition, and the drain pipe (52) is S-shaped; preferably, the upper part and the lower part of the bent part of the drain pipe (52) are respectively provided with a section of water column, and the heights of the two sections of water columns are not less than 300mm.

5. The rail vehicle body structure according to claim 2, wherein the drain hole (442 a) of the drain structure (44) is located outside the junction box (5), and the water valve (53) is directly mounted at the drain hole (442 a); after entering between the outer plate (4411) and the inner plate (4412) of the drainage ditch structure (44), water flows downwards from the drainage hole (442 a) of the partition plate (442) and is drained out of the vehicle through the water valve (53), and the whole drainage path forms a chassis floor rapid drainage channel (A1).

6. The rail vehicle car body structure according to any one of claims 1 to 5, characterized in that the condensate drain channel (B) comprises two main drain paths:

i. arc top (11) → top wall panel (31) → end wall panel (32) → end beam (42) → under-vehicle;

ii, roof side rail (13) → pillar (21) and side wall panel (22) → underframe side rail (43) → under-the-vehicle.

7. The rail vehicle body structure according to any one of claims 1 to 5, wherein the air supply/return opening (12) is rectangular, the transverse direction of the air supply/return opening (12) is in contact with a straight rib plate (111), the straight rib plate (111) prevents water from flowing to both sides, drain holes (11 a) are formed in four corners of the air supply/return opening (12), and water flowing into the arc roof (11) can be drained out of the cavity through the drain holes (11 a) of the quick drain passage (A).

8. The rail vehicle body structure according to any one of claims 1 to 5, wherein the cavity direction of the vertical column (21) of the side wall (2) is an up-down direction, and water in the cavity of the vertical column (21) enters the side frame (43) from the side frame water inlet (43 a), flows from the cavity inside the side frame (43) to the front end and the rear end, then flows downwards from the drainage grooves at the two ends, and finally is discharged out of the vehicle from the lower surface of the side frame (43).

9. The rail vehicle body structure according to any one of claims 1 to 5, wherein water in the side wall plate (22) flows to the side wall plate notches (22 a) at the front and rear ends and is drained from top to bottom, and the water is preferentially drained from the pillar drain hole (21 b) of the on-vehicle quick drain passage (A) to the on-vehicle under frame under the blockage of the outer wall (21 a) of the pillar (21); after the quick drainage channel (A) on the train is sealed by glue, condensed water generated in the operation process of the train flows into the cavity of the upright post (21) from the gap of the outer wall (21 a) and is discharged from the water inlet (43 a) of the boundary beam.

10. The rail vehicle body structure according to any one of claims 1 to 5, wherein the upper surface of the end beam (42) is provided with an end beam water inlet (42 a) for discharging water in the cavity of the end wall plate (32), and the water passes through the groove (42 c) of the cavity rib plate and then flows to an end beam water outlet (42 b) to be discharged under the vehicle; the upper surface of the underframe boundary beam (43) is provided with a boundary beam water inlet (43 a) for discharging water in the upright column (21), and the water passes through the grooves or gaps at the two ends of the boundary beam and is discharged to the underside of the car through a boundary beam water outlet (43 b).

11. The rail vehicle body structure according to any one of claims 1 to 5, wherein a screen cabinet (6) for mounting an electrical equipment system is arranged above the underframe floor (41) at four corners of the carriage of the vehicle body, the side surfaces of the screen cabinet (6) are respectively adjacent to the side wall (2) and the end wall (3), a drainage ditch structure (44) is arranged below the screen cabinet (6), and water entering the inner area of the screen cabinet (6) from glue seams at the connecting parts of the screen cabinet (6) and the underframe floor (41), the end beam (42) and the underframe edge beam (43) is drained to the lower part of the vehicle through the drainage ditch structure (44).

12. A method for watertight sealing of a rail vehicle body structure according to any of the claims 1-11, characterized by the steps of:

after the vehicle body is provided with equipment, a rain test is carried out, and the water tightness of the rail vehicle is determined to meet the requirements, the upper part of the rapid drainage channel (A) is permanently blocked, and only a drainage ditch structure (44) of the underframe floor (41) is reserved for discharging accidental water inflow in the daily cleaning process of the interior of the train; the drain holes on the lower surfaces of the side beam (43) of the chassis and the end beam (42) of the condensed water drain channel (B) are sealed by detachable plugging pieces (46), and the drain water is opened at certain intervals or when needed, and then is plugged again for sealing.