Vehicle end wall overline system and railway vehicle

Abstract

The invention relates to the technical field of railway vehicles, in particular to a vehicle end wall overline system and a railway vehicle, the vehicle end wall overline system comprises a first end wall and a second end wall, the vehicle end wall overline system is arranged between the first end wall and the second end wall, and the vehicle end wall overline system comprises a low-voltage overline and a middle-high-voltage overline; the low-voltage overline is installed between the first end wall and the second end wall and located above the first end wall and the second end wall, and the middle-high-voltage overline is installed between the first end wall and the second end wall and located below the first end wall and the second end wall. According to the scheme, the low-voltage overline is arranged above the end wall, and the middle-high-voltage overline is arranged below the end wall, so that mutual compatibility of the two lines is ensured. And a waterproof mechanism is arranged to achieve a waterproof effect on the installation positions of the low-voltage overline and the high-voltage overline. The problem that reliable waterproof and electromagnetic compatibility cannot be synchronously realized in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail vehicles, in particular to a car end wall cross-line system and a rail vehicle. BACKGROUND

[0002] In the multi-car electrical connection system of a rail vehicle, the car end cross-line structure bears the core functions of transmitting control signals and medium and high voltage power. Two wiring schemes are currently widely used in the industry:

[0003] I. Car bottom centralized wiring mode: high and low voltage cables are placed together in the car bottom cable slot. This design has systematic defects - the car bottom environment is exposed to rain splashing, ballast impact and other harsh working conditions for a long time, causing the cable sealing joint to age rapidly, and then causing insulation resistance to drop or even short circuit failure; in addition, the mixed laying of high and low voltage produces serious electromagnetic interference, forcing the signal cable to have an additional shielding layer, significantly increasing the cost of the wiring harness; more importantly, maintenance personnel need to work in a narrow car bottom space, which has safety hazards and low operating efficiency.

[0004] II. End wall surface hanging scheme: to avoid the car bottom problem, the cross-line components are moved to the car end wall. Although this scheme improves accessibility, it still has significant shortcomings:

[0005] ① Insufficient waterproof capability: the cross connector is directly exposed to the vertical end wall surface, lacking active flow guiding structure. Rainwater infiltrates into the gap between electrical connectors along the end wall surface, causing contact oxidation and communication interruption;

[0006] ② EMC protection is missing: the parallel distance between low voltage signal lines and medium and high voltage bus is insufficient (usually only 50-80mm), which cannot meet the isolation requirements of EN 50121-3-2 standard (low voltage signal lines and medium and high voltage lines are not less than 200mm apart) for power cables above 300V.

[0007] The existing technology cannot simultaneously achieve reliable waterproofing and electromagnetic compatibility. Therefore, a car end wall cross-line system and a rail vehicle are proposed. SUMMARY

[0008] The purpose of the present application is to provide a car end wall cross-line system and a rail vehicle, which can avoid electromagnetic interference between low voltage cross-line and medium and high voltage cross-line.

[0009] To achieve the above purpose, the present application provides a car end wall cross-line system, comprising a first end wall and a second end wall, the car end wall cross-line system being arranged between the first end wall and the second end wall, and the car end wall cross-line system comprising:

[0010] a low voltage cross-line installed between the first end wall and the second end wall and located above the two end walls;

[0011] The middle and high voltage cross-over wire is installed between the first end wall and the second end wall and is located near the lower side of the two walls;

[0012] The cross-over connector is installed on the opposite side of the first end wall and the second end wall respectively and is connected with the low voltage cross-over wire to realize the transmission of low voltage signal.

[0013] The cross-over box is installed on the opposite side of the first end wall and the second end wall respectively and is internally provided with stud terminals for connecting the middle and high voltage cross-over wire.

[0014] The waterproof mechanism comprises:

[0015] The sealing joint is used for sealing the interface between the middle and high voltage cross-over wire and the cross-over box.

[0016] The mounting panel is provided with a waterproof eave in the first direction and is used for fixing the cross-over connector.

[0017] The first sealing gasket is arranged between the mounting panel and the first end wall or the second end wall.

[0018] Preferably, the waterproof eave is an extended structure which is bent outwardly from the first end wall or the second end wall and is used for shielding rainwater flowing to the cross-over connector.

[0019] Preferably, the cross-over box is connected with an inspection cover plate which is used for opening or closing the cross-over box.

[0020] The second sealing gasket is arranged on the inner side of the inspection cover plate and is pressed against the opening edge of the cross-over box when the inspection cover plate is closed.

[0021] Preferably, the two ends of the middle and high voltage cross-over wire connected with the cross-over box are also provided with sealing joints.

[0022] Preferably, the joint between the mounting panel and the cross-over box is filled with sealing glue for waterproofing.

[0023] Preferably, the device further comprises two cross-over wire fixing seats which are fixed on the opposite sides of the first end wall and the second end wall respectively and are used for restricting the wire path of the low voltage cross-over wire.

[0024] Preferably, the outer side of the low voltage cross-over wire is sleeved with a corrugated pipe for protection.

[0025] Preferably, the low voltage cross-over wire and the cross-over connector are connected through a hose joint which has a waterproof sealing function.

[0026] Preferably, the distance between the low voltage cross-over wire and the middle and high voltage cross-over wire is not less than 200mm.

[0027] A rail vehicle comprising at least two adjacent carriages, wherein an end-to-end wall crossing system of any one of the above is installed between the end walls of the two adjacent carriages.

[0028] Compared to the aforementioned background technologies, this solution places the low-voltage crossover line near the top of the end wall and the medium- and high-voltage crossover lines near the bottom of the end wall to increase the distance between them, ensuring compatibility between the two lines. Furthermore, a dedicated waterproof mechanism provides comprehensive protection in multiple scenarios: it creates a sealed waterproof protection for the top of the crossover connectors at both ends of the low-voltage crossover line during rain, and effectively protects the medium- and high-voltage crossover line crossover boxes from splashing water during train operation. This solution not only resists water intrusion from different directions but also ensures electromagnetic compatibility performance through structural optimization, fundamentally solving the problems of insufficient waterproof reliability and difficulty in simultaneously addressing electromagnetic interference between low-voltage and medium- and high-voltage crossover lines in existing technologies. Compared to traditional solutions, this design significantly improves waterproofing while maintaining stable system electrical performance, making it suitable for crossover connection protection in harsh environments such as rail transit. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the low-voltage crossover and the medium- and high-voltage crossover in the embodiments of this application.

[0031] Figure 2 This is a schematic diagram showing the positions of the jumper connector and jumper box in the embodiments of this application.

[0032] Figure 3 This is a front view of the first end wall or the second end wall in the embodiments of this application.

[0033] Figure 4 Examples of embodiments in this application Figure 3 Enlarged view of point A.

[0034] Figure 5 Examples of embodiments in this application Figure 3 Enlarged view of point B.

[0035] Wherein: 1, first end wall; 2, second end wall; 3, low-voltage cross line; 4, medium and high-voltage cross line; 5, cross connector; 6, sealing joint; 7, cross line fixing seat; 8, cross box; 9, maintenance cover plate; 10, second sealing gasket; 11, mounting panel; 12, first sealing gasket; 13, stud terminal; 14, hose joint; 15, corrugated pipe. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] In order for those skilled in the art to better understand the present application, the present application will be further described below with reference to the drawings and specific embodiments.

[0038] It should be noted that the "upper end, lower end, left side, right side" and other orientation words described below are defined based on the drawings of the specification.

[0039] The embodiments of the present application will be further described below with reference to the drawings. In order to facilitate understanding and description of the embodiments of the present application, a three-dimensional coordinate system is established in part of the drawings, and the Z-axis direction is the first direction, and the X-axis direction, Y-axis direction and Z-axis direction are perpendicular to each other.

[0040] The car end wall cross line system provided by the embodiments of the present application is used for being installed on a rail vehicle, wherein the rail vehicle comprises a first end wall 1 and a second end wall 2. The car end wall cross line system is arranged between the first end wall 1 and the second end wall 2, and the car end wall cross line system comprises a low-voltage cross line 3, a medium and high-voltage cross line 4, a cross connector 5, a cross box 8 and a waterproof mechanism.

[0041] As shown in FIG. 1, the car end wall cross line system is arranged between the first end wall 1 and the second end wall 2. Figure 1 The low-voltage cross line 3 and the medium and high-voltage cross line 4 are arranged in the Z-axis direction in an up-down manner, and adjacent two cars are arranged in the Y-axis direction in front and back, and the end wall is in the plane composed of the X-axis and the Z-axis.

[0042] The distance between the low-voltage cross line 3 and the medium and high-voltage cross line 4 is not less than 200 mm, so as to meet the isolation requirement between the low-voltage cross line 3 and the medium and high-voltage cross line 4 in the EN 50121-3-2 standard. And the low-voltage cross line 3 and the medium and high-voltage cross line 4 are further arranged between the adjacent two cars, so as to avoid the bad working conditions such as rain splashing and ballast impact, and also facilitate the maintenance of the maintenance personnel.

[0043] The waterproof mechanism arranged therein is used to waterproof the cross connection connector 5 connected to the low-voltage cross line 3 and the cross connection box 8 connected to the medium-high voltage cross line 4. Specifically, for the cross connection connector 5 above, rainwater infiltration into the gap between the electrical connectors is mainly prevented, which causes the oxidation of the contact and the interruption of communication; for the cross connection box 8 below, the influence of track splashing on the normal operation of the medium-high voltage cross line 4 is mainly prevented when the railway vehicle is running.

[0044] Specifically, the low-voltage cross line 3 is installed between the first end wall 1 and the second end wall 2 and is located near the top of the two walls. The medium-high voltage cross line 4 is installed between the first end wall 1 and the second end wall 2 and is located near the bottom of the two walls.

[0045] The first end wall 1 and the second end wall 2 are the opposite walls between two adjacent carriages, and the setting direction of the carriage end wall is on the plane composed of the Z axis and the X axis in the drawing. Figure 1 The low-voltage cross line 3 and the medium-high voltage cross line 4 are arranged in the Z-axis direction. The spatial layout of the car end wall cross line system is as follows: the low-voltage cross line 3 is arranged between the first end wall 1 and the second end wall 2 and is located in the upper adjacent area of the vertical height H of the end wall (specifically in the height interval of 0.7H to 0.8H); the medium-high voltage cross line 4 is arranged in the lower adjacent area of the same cross space (located in the height interval of 0.1H to 0.2H). In this way, electromagnetic interference between the low-voltage cross line 3 and the medium-high voltage cross line 4 is avoided.

[0046] The cross connection connector 5 is installed on the opposite side of the first end wall 1 and the second end wall 2 of the adjacent carriage and is connected to the low-voltage cross line 3 to realize low-voltage signal transmission.

[0047] The cross connection connector 5 is installed on the opposite side of the first end wall 1 and the second end wall 2 of the adjacent carriage and is connected to the low-voltage cross line 3 to realize low-voltage signal transmission.

[0048] In some embodiments, the low-voltage cross line 3 is sleeved with a corrugated pipe 15 for protection. The corrugated pipe 15 covering the low-voltage cross line 3 is made of flame-retardant polyamide material, and the pipe wall is designed as a spiral reinforcing rib structure. Not only can it resist mechanical impact such as ballast splashing, but also the smooth surface inside can reduce cable drag and wear. The connection part of the pipe body and the connector is fixed by a anti-loose clamp to form a continuous and complete protection system.

[0049] The jumper boxes 8 are respectively installed on the opposite sides of the first end wall 1 and the second end wall 2, and are internally provided with stud terminals 13 for connecting the medium-high voltage cross lines 4. The jumper boxes 8 are arranged in pairs on the opposite installation surfaces of the first end wall 1 and the second end wall 2, for connecting the medium-high voltage cross lines 4, and further sealing the connection between the medium-high voltage cross lines 4 and the jumper boxes 8 through the rubber sealing joints 6, thereby playing a waterproof role.

[0050] For the medium-high voltage cross lines 4, the jumper boxes 8 are also arranged in pairs on the opposite surfaces of the two end walls, and are internally provided with stud terminals 13 for reliably connecting the current. The external cable inlet is compressively sealed through the elastic rubber sealing joint 6, which is made of heat-resistant rubber material and has the characteristics of anti-aging and high and low temperature resistance.

[0051] The cooperation of the jumper connector 5 and the bellows 15 and the differential cooperation design of the jumper box 8 and the sealing joint 6 enable the system to maintain excellent electrical performance and protection reliability under complex working conditions.

[0052] In some embodiments, the car end wall cross line system further comprises two cross line fixing seats 7, which are respectively fixed on the opposite sides of the first end wall 1 and the second end wall 2, for constraining the routing path of the low-voltage cross line 3.

[0053] Through the reasonable arrangement of the two cross line fixing seats 7, the routing control problem of the low-voltage cross line 3 at the car body connection is effectively solved. Specifically, the two cross line fixing seats 7 are rigidly installed on the opposite sides of the first end wall 1 and the second end wall 2 of the adjacent car bodies, forming a reliable fixed-point support structure. The cross line fixing seat 7 can also flexibly adjust the clamping gap according to different wire diameters, ensuring that the low-voltage cross line 3 smoothly transitions at a preset radius without abnormal sagging. The cross line fixing seat 7 is further provided with an anti-abrasion rubber pad on the surface, which not only avoids friction damage when the line moves, but also prevents accidental displacement of the cable by increasing the surface friction coefficient.

[0054] The routing management design of the cross line fixing seat 7 to the low-voltage cross line 3 not only eliminates the risk of electromagnetic interference between the low-voltage cross line 3 and the medium-high voltage cross line 4, but also facilitates quick positioning operations during subsequent maintenance.

[0055] The waterproof mechanism seals the jumper box 8 through the maintenance cover plate 9, and is specifically used to prevent the accumulated water on the track from affecting the medium-high voltage cross line 4 located in a low position when the railway vehicle is running.

[0056] In some embodiments, the jumper box 8 is connected with the maintenance cover plate 9, the maintenance cover plate 9 is used to open or close the jumper box 8, and the inner side of the maintenance cover plate 9 is provided with a second sealing gasket 10, which is pressed against the opening edge of the jumper box 8 when the maintenance cover plate 9 is closed.

[0057] AsFigure 2 As shown, the connection position of the middle-high voltage cross-line 4 and the cross-over box 8 is below the cross-over box 8, and the splashing water can be effectively avoided from affecting the connection position of the middle-high voltage cross-line 4 through the sealing joint 6.

[0058] Further, the maintenance cover plate 9 is arranged, when the maintenance personnel performs maintenance, the maintenance cover plate 9 is opened, and the connection position of the middle-high voltage cross-line 4 in the cross-over box 8 can be maintained, and the second sealing gasket 10 is arranged to seal the position where the maintenance cover plate 9 contacts the cross-over box 8. It should be noted that the second sealing gasket 10 is made of rubber material with good resilience, which is used to completely block the penetration of water vapor. The maintenance cover plate 9 and the second sealing gasket 10 cooperatively constitute a radial compression seal to block the axial penetration path of rainwater and track splashing liquid.

[0059] In some embodiments, the waterproof mechanism is used to waterproof and seal the cross-over connector 5 through the installation panel 11 and the waterproof eave, which is specifically used to prevent the rainwater from flowing down along the end wall to affect the low-voltage cross-line 3 located at a high position in rainy weather.

[0060] The installation panel 11 is provided with a waterproof eave in a first direction and is used to fix the cross-over connector 5. The first direction is consistent with the Z-axis direction in the first end wall 1 and the second end wall 2. Figure 1 The installation panel 11 has the effect of installing the cross-over connector 5, and the waterproof eave arranged above the cross-over connector 5 is used to block the falling rainwater.

[0061] Specifically, the waterproof eave is an extension structure bent outward from the first end wall 1 or the second end wall 2, which is used to block the rainwater flowing to the cross-over connector 5. The upward extension water-blocking design can effectively block the rainwater flowing along the surface of the end wall, so as to avoid the water flow directly washing the cross-over connector 5 below. The inclination angle and the extension length of the eave are optimized, which can ensure the blocking effect while not affecting the overall layout of the equipment.

[0062] In some embodiments, the first sealing gasket 12 is further arranged between the installation panel 11 and the first end wall 1 or the second end wall 2. The water between the installation panel 11 and the first end wall 1 or the second end wall 2 is isolated, so as to avoid water entering the cross-over connector 5. The joint between the installation panel 11 and the cross-over box 8 is further filled with a sealing glue for waterproofing.

[0063]

[0064] ​The first sealing gasket 12 is made of flexible sealing material and can form a waterproof layer between the panel and the end wall. The compression characteristics of the sealing gasket ensure that effective sealing can be maintained even if the panel is stressed or slightly displaced. In addition, the edge of the panel is further reinforced by a sealing glue to prevent rainwater from seeping in from the joint. It should be noted that the sealing glue not only has good waterproof performance, but also has a certain elasticity, which can adapt to the vibration and thermal expansion and contraction during train operation.

[0065] In some embodiments, the low-voltage cross-line 3 is connected to the cross-connector 5 through a hose joint 14, which has a waterproof sealing function. The waterproof structure of the hose joint 14 adopts dynamic sealing, which allows a certain range of flexible displacement while ensuring the connection strength, and can effectively absorb the vibration energy during vehicle operation. In addition, the outer surface of the hose joint 14 is also provided with a spiral flow guide groove (not shown in the figure), which can quickly guide the rainwater attached to the joint away from the key sealing area.

[0066] It should be noted that the hose joint 14 is preferably designed as a quick-release structure, which can be disassembled without special tools during maintenance. By providing the hose joint 14, the convenience of maintenance is taken into account, so that the low-voltage cross-line 3 can maintain stable and reliable electrical connection under various adverse weather conditions.

[0067] The embodiments of the present application also include a railway vehicle, which comprises at least two adjacent carriages (1) Figure 1 Only the end wall part of the two adjacent carriages is shown), and the end walls of the two adjacent carriages are provided with the above-mentioned car end wall cross-line system. Through the car end wall cross-line system, the distance between the low-voltage cross-line 3 and the medium-high voltage cross-line 4 is increased, so as to avoid electromagnetic interference between the two cross-lines. The waterproof mechanism is also provided to protect against rainwater or water splashed from the track, so as to avoid the influence of water ingress on the transmission of the cross-line. This scheme fundamentally solves the technical contradiction between the waterproof reliability and electromagnetic compatibility of the traditional cross-line system.

[0068] It should be noted that in the present specification, relational terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities.

[0069] The above describes in detail a car end wall cross-line system and a railway vehicle provided by the present application. The principles and implementation modes of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only used to help understand the scheme and core idea of the present application. It should be noted that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A car end wall overline system comprising a first end wall (1) and a second end wall (2), characterized in that, The car end wall cross-line system comprises: a low-voltage cross-line (3) installed between the first end wall (1) and the second end wall (2) at a position close to the upper side; a medium-high voltage cross-line (4) installed between the first end wall (1) and the second end wall (2) at a position close to the lower side; a cross-connection connector (5) installed on the opposite side of the first end wall (1) and the second end wall (2) respectively and connected to the low-voltage cross-line (3) to realize low-voltage signal transmission; a cross-connection box (8) installed on the opposite side of the first end wall (1) and the second end wall (2) respectively, which is internally provided with a stud terminal (13) for connecting the medium-high voltage cross-line (4); a waterproof mechanism, which comprises: a sealing joint (6) for sealing the interface between the medium-high voltage cross-line (4) and the cross-connection box (8); a mounting panel (11) provided with a waterproof eave in the first direction and used for fixing the cross-connection connector (5); a first sealing gasket (12) arranged between the mounting panel (11) and the first end wall (1) or the second end wall (2).

2. A car end wall over-the-road system as defined in claim 1 wherein, The waterproof eave is an extended structure bent outward from the first end wall (1) or the second end wall (2) and used for shielding rainwater flowing to the cross-connection connector (5).

3. A car end wall over-the-road system as defined in claim 1 wherein, The cross-connection box (8) is connected with an inspection cover plate (9) used for opening or closing the cross-connection box (8); The inside of the inspection cover plate (9) is provided with a second sealing gasket (10), which is pressed against the opening edge of the cross-connection box (8) when the inspection cover plate (9) is closed.

4. A car end wall over-the-road system as defined in claim 1 wherein, The two ends of the medium-high voltage cross-line (4) connected with the cross-connection box (8) are also provided with sealing joints (6).

5. A car end wall over-the-road system as defined in claim 1 wherein, The joint between the mounting panel (11) and the cross-connection box (8) is filled with sealing glue for waterproofing.

6. A car end wall over-the-road system as defined in claim 1 wherein, Two cross-line fixing seats (7) are further included, which are fixed on the opposite sides of the first end wall (1) and the second end wall (2) respectively and used for restricting the wiring path of the low-voltage cross-line (3).

7. A car end wall over-the-road system as defined in claim 1 wherein, The outside of the low-voltage cross-line (3) is provided with a corrugated pipe (15) for protection.

8. A car end wall over-the-road system as defined in claim 1 wherein, The low-voltage cross-line (3) and the cross-connection connector (5) are connected through a hose joint (14) having a waterproof sealing function.

9. A car end wall over-the-road system as defined in claim 1 wherein, The distance between the low-voltage cross-line (3) and the medium-high voltage cross-line (4) is not less than 200 mm.

10. A rail vehicle comprising at least two adjacent carriages, characterized in that The end walls of two adjacent carriages are provided with the car end wall cross-line system as claimed in any one of claims 1-9.

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