A track beam structure for a magnetic levitation line

Abstract

A track beam structure of a magnetic levitation line comprises a channel beam and a functional rail assembly arranged on the channel beam by a mounting piece, the cross section of the channel beam is U-shaped, the channel beam has two oppositely arranged arc-shaped side beams, the functional rail assembly is arranged on each arc-shaped side beam, the mounting piece comprises a tooth groove assembly and a wedge, the tooth groove assembly is mounted on the inner side of the arc-shaped side beam, the wedge is detachably mounted on the tooth groove assembly, the functional rail assembly comprises an F rail and a power supply rail, and the F rail and the power supply rail are fixedly arranged on the wedge. The track beam itself is used as a channel and a guardrail for passenger evacuation, which provides a safe space for escape and track maintenance operation, and the construction is simple, convenient to install and maintain, and the construction cost is saved.

Description

Technical Field

[0001] This invention relates to the field of magnetic levitation transportation, and more particularly to a track beam structure suitable for low-capacity magnetic levitation lines. Background Technology

[0002] In existing conventional low-speed maglev transportation systems, the track beam structure generally adopts the form of "box girder + track panel", such as... Figure 1 As shown, track beam 1' is a box girder, and track panels 2' are supported on cast-in-place rail support platforms 3', connected to track beam 1' as a whole by pre-embedded bolts. Power rail 4' and F rail 5' are installed on the side of track beam 1', and the carriage 6' runs on the track beam structure in a "car-wrapped-rail" manner. Due to the large gaps between the existing maglev double lines, and the considerable gaps between adjacent sleepers on the track, a rudimentary temporary passage and guardrails had to be installed in the middle of the double lines to meet design requirements. However, due to the hollow lower part and the overly rudimentary facilities, such a temporary passage made emergency train evacuation difficult, and it was also very dangerous for workers to perform maintenance work while standing on the suspended sleepers.

[0003] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a track beam structure for a maglev line, which uses the track beam itself as a passenger evacuation passage and guardrail, providing a safe space for escape and track maintenance operations. It is also simple to construct, easy to install and maintain, and saves construction costs.

[0005] To achieve the above objectives, the present invention provides a track beam structure for a magnetic levitation line, comprising: a channel beam, and a functional rail assembly mounted on the channel beam by means of mounting components;

[0006] The cross-section of the channel beam is U-shaped, and the channel beam has two oppositely arranged arc-shaped side beams, each of which is provided with the functional rail assembly.

[0007] The mounting component includes a toothed assembly and a wedge, the toothed assembly being mounted on the inner side of the arc-shaped side beam, and the wedge being detachably mounted on the toothed assembly;

[0008] The functional rail assembly includes an F rail and a power supply rail, both of which are fixedly mounted on the wedge block.

[0009] The arc-shaped side beam is arc-shaped, and the center of the arc-shaped side beam is located at the midpoint of the upper surface of the carriage floor;

[0010] The toothed assembly is arc-shaped, and the curvature of the toothed assembly is the same as that of the arc-shaped side beam. The toothed assembly has multiple racks that are parallel to each other along the vehicle's running direction, and toothed grooves are formed between adjacent racks.

[0011] The wedge has multiple teeth, the shape and size of which match the shape and size of the tooth groove. The teeth can be inserted into the tooth groove, allowing the wedge to be installed onto the tooth groove assembly.

[0012] The angle α corresponding to the curvature of the tooth groove is 0.8° to 1°.

[0013] The channel beam includes a base plate, which is connected to the arc-shaped side beams. The base plate has a length of 2690mm to 3600mm and a thickness of 200mm.

[0014] The channel beam includes an upper flange, which is connected to the arc-shaped side beam. The top of the upper flange is at the same level as the carriage floor. The length of the upper flange is 390mm to 790mm and the thickness is 150mm to 300mm.

[0015] An embedded steel plate is provided inside the arc-shaped side beam, and the toothed assembly is fixed together with the embedded steel plate by fasteners.

[0016] Both the toothed assembly and the wedge are made of 40Cr material.

[0017] The wedge has an installation platform, and the two installation platforms, which are respectively set on the two opposite arc-shaped side beams, are located on the same plane.

[0018] Both the F-rail and the power supply rail are mounted on the mounting platform. The F-rail faces the center of the channel beam, and the power supply rail is closer to the arc-shaped side beam than the F-rail.

[0019] The channel beam provided by this invention adopts an embedded structure, eliminating the original "sleeper + rail support platform" structure of the box girder and replacing it with a "toothed groove assembly + wedge block" structure. Since the toothed groove assembly and wedge blocks are standard parts, they can be mass-produced quickly and assembled in the factory, saving the complex on-site casting process and significant construction costs. The embedded channel beam itself can serve as a passenger evacuation passage and guardrail, avoiding the need to build a separate escape platform and providing a safe working space for track maintenance. Placing both the F-rail and the power supply rail on the wedge blocks inside the channel beam fundamentally improves the system's environmental adaptability. Moving the power supply rail from the side of the box girder to the wedge blocks inside the channel beam makes installation and maintenance more convenient and simple. The use of precast concrete beams allows the track itself to bear loads, eliminating the need for a bridge structure below the track layer and further reducing foundation construction costs. The integral structure enables the base plate to bear loads, allowing maintenance personnel to work on the beam, and passengers to descend from the train end to the track beam and evacuate safely via the emergency escape passage. This invention is applicable to low-capacity tourism transportation and can greatly save construction costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the track beam structure in the background art.

[0021] Figure 2 This is a partial side view of a track beam structure suitable for low-capacity maglev lines provided by the present invention.

[0022] Figure 3 yes Figure 2 Sectional view along the BB direction.

[0023] Figure 4 yes Figure 2 A cross-sectional view along the CC direction.

[0024] Figure 5 This is a schematic diagram of the cooperation between the track beam structure and the carriage provided by the present invention.

[0025] Figure 6 This is a schematic diagram of the toothed assembly.

[0026] Figure 7 This is a schematic diagram of the wedge block.

[0027] Figure 8 This is a schematic diagram of the wedge installation structure when a train passes over a cross slope. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the embodiments of the present invention. Please refer to the drawings to make the objectives, features, and advantages of the present invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the present invention, should still fall within the scope of the technical content disclosed in the present invention.

[0029] like Figures 2-5 As shown, the present invention provides a track beam structure suitable for low-capacity maglev lines, comprising a channel beam 1 and functional rail assemblies mounted on the channel beam 1 via mounting components. The channel beam 1 has a U-shaped cross-section and includes a base plate 11, two arc-shaped side beams 12 connecting the base plate 11, and an upper flange 13 connecting the arc-shaped side beams 12. The base plate 11 supports the overall track beam structure and is lengthened and thickened, with a length of 2690mm to 3600mm and a thickness of 200mm to improve the overall bending stiffness of the track beam. The arc-shaped side beams 12 are used to mount the functional rail assemblies, and the lower part of the carriage 7 is accommodated within the arc-shaped side beams 12. The top of the upper flange 13 is at the same level as the floor 71 of the carriage 7, serving as a platform and step for passengers to get on and off the vehicle. The upper flange 13 is also lengthened and thickened, with a length of 390mm to 790mm and a thickness of 150mm to 300mm, in order to improve the overall bending stiffness of the track beam.

[0030] like Figures 2-5 As shown, the functional rail assemblies are respectively installed on the two inner sides of the channel beam 1, that is, the inner side of each arc-shaped side beam 12 is provided with a functional rail assembly through the mounting parts.

[0031] The mounting component includes a toothed assembly 2 and a wedge 3. The toothed assembly 2 is installed on the inner side of the arc-shaped side beam 12, as shown below. Figure 6 As shown, the main body 21 of the toothed assembly 2 is arc-shaped, and the curvature of the main body 21 is the same as that of the arc-shaped side beam 12, so that the toothed assembly 2 and the arc-shaped side beam fit together seamlessly and achieve a tight fit. The main body 21 has multiple parallel racks 22, and adjacent racks 22 form toothed grooves 23. The directions of the racks 22 and the toothed grooves 23 are parallel to the vehicle's running direction D. Figure 2In this embodiment, as Figures 2-5 As shown, the toothed assembly 2 is fixed to the arc-shaped side beam 12 using a pre-embedded steel plate 6 and fasteners. First, the pre-embedded steel plate 6 is pre-embedded in the arc-shaped side beam 12, and then fixed using screws 8 (…). Figure 4 The toothed assembly 2 and the embedded steel plate 6 are fixed together on the arc-shaped side beam 12. During on-site construction, bolt holes can be cast on-site to ensure a tighter fit. Figure 7 As shown, the wedge 3 has a connecting part 31 and a mounting part 32. The curvature of the connecting part 31 is the same as the curvature of the main body 21 of the toothed assembly 2. The connecting part 31 has multiple insert teeth 311, the shape and size of which match the shape and size of the toothed groove 23. The insert teeth 311 can be inserted into the toothed groove 23 axially. Relying on the meshing action of the toothed groove 23, the wedge 3 is fixed on the toothed assembly 2. The mounting part 32 has a mounting platform 321 for mounting the functional rail assembly, which can ensure that the functional rail assemblies on both sides are located on the same plane. In this embodiment, the toothed assembly 2 and the wedge 3 are both made of 40Cr material, which has extremely strong vibration and fatigue resistance, outstanding wear resistance and deformation resistance, and excellent environmental adaptability. After heat treatment, the high strength (yield strength ≥785MPa) and high fatigue limit (≈400MPa) can effectively resist the high-frequency electromagnetic vibration (200-500Hz) and impact load generated when the maglev train passes at high speed. Surface hardening can reach HRC 50-55, significantly reducing wear on fastening contact surfaces and ensuring long-term stability of preload. High rigidity can resist the lateral electromagnetic force of the F-rail and the electromagnetic attraction of the power supply rail, preventing track deviation caused by deformation. Mechanical properties fluctuate by less than 10% within the range of -40℃ to 150℃, adapting to the extreme winter and summer temperatures of viaducts.

[0032] like Figures 2-5 As shown, the functional rail assembly includes an F-rail 4 and a power supply rail 5. The F-rail 4 is fixedly mounted on the mounting platform 321 of the wedge block 3. In this embodiment, the F-rail 4 can be fixed to the wedge block 3 by bolts 41. The F-rail 4 is located at the edge of the wedge block 3, facing the center of the channel beam 1, and can adapt to the structure of the embedded magnetic levitation vehicle body. When the superconductor 72 (under the carriage 7) Figure 5 When the car passes over rail F4 at high speed, rail F4 "pushes" the car 7 up, causing the car 7 to be in a suspended state. The power supply rail 5 is fixedly mounted on the mounting platform 321 of the wedge block 3. In this embodiment, it is supported by an insulating bracket 14. Figure 3The power supply rail 5 is fixed to the wedge block 3 by bolts (not shown in the figure). Since current flows through the power supply rail 5, and the wedge block 3 below is a steel structure, an insulating bracket 14 is installed between the power supply rail 5 and the wedge block 3 to prevent current leakage. The power supply rail 5 is closer to the arc-shaped side beam 12 than the F-rail 4. A lower contact current collector 73 is installed below the carriage 7. Figure 5 It obtains electrical energy from power supply rail 5.

[0033] exist Figure 3 In the middle, the wedge 3 is restricted in radial and axial displacement by the toothed structure 2 and is firmly fixed to the toothed structure 2. The F-rail 4 and the power supply rail 5 are mounted on the wedge 3, combined with... Figure 4 It can be seen that the way F rail 4 and power supply rail 5 are connected to wedge block 3 is similar to the way F rail and sleeper are connected in box girder. The difference is that the power supply rail 5 is changed from being installed on the side of box girder to being installed on wedge block 3 on the inside of channel beam 1. This method makes installation and maintenance more convenient and simple.

[0034] like Figure 8 As shown, the arc-shaped side beam 12 is an arc centered at the midpoint 711 of the upper surface of the floor 71 of the carriage 7. Correspondingly, the main body 21 of the toothed assembly 2 is also an arc. Therefore, when installing the wedge 3, installing the wedge 3 at different positions on the toothed assembly 2 can correspond to different rotation angles of the vehicle body. Figure 6 As shown, in this embodiment, the angle α corresponding to the curvature of each tooth groove 23 is 1°. Figure 8 As shown, when the train passes over a cross slope (superelevation, a core design parameter in track engineering, refers to the elevation of the outer track or track beam relative to the inner side of a curved section, which generates a centripetal force component by tilting the track surface to balance the centrifugal force when the train turns), the installation angle of the two opposing wedges 3 can be adjusted by installing them into different slots 23 of the toothed assembly 2, thereby achieving a tilt angle for the carriage 7 when passing through. In this embodiment, with the horizontal plane as the 0° reference, the cooperative installation of the toothed assembly 2 and the wedges 3 can achieve a tilt angle of ±8° for the carriage 7. In other embodiments, the angle of each slot 23 of the toothed assembly 2 can also be set to 0.9° or 0.8° to achieve a more precise angle adjustment. By setting different arc sizes for the front and rear wedges in the track direction, for example, setting the arc of the front wedge to 1 degree and the arc of the rear wedge to 0.9 degrees, the angle change between these two locations can be made more precise, to 0.1 degrees. Fine adjustment of smaller angles can also be achieved by installing shims between the wedges 3 and the F-rail 4.

[0035] like Figure 8As shown, since the arc-shaped side beam 12 is an arc with the midpoint 711 of the upper surface of the floor 71 of the carriage 7 as the center, when the vehicle body rotates, there will be no large displacement in the vertical direction, the change in the suspension gap is very small, and the upper flange 13 of the carriage 7 and the channel beam 1 still maintains a distance of 12cm to 14cm. The stability and safety of the whole system are good.

[0036] Compared to box girders, the height of the channel beam 1 provided by this invention is reduced from 1830mm to 1580mm, while the width is increased from 1400mm to 4580mm. Calculations show that compared to box girders, the cross-sectional area of ​​the channel beam 1 increases by 10%, while the moment of inertia decreases by only 6%. For such an open structure, sacrificing some bending stiffness is acceptable given the small increase in cross-sectional area.

[0037] The channel beam 1 provided by this invention adopts an embedded structure, eliminating the original "sleeper + rail support platform" structure of the box girder and replacing it with a "toothed groove assembly + wedge block" structure. Since the toothed groove assembly and wedge blocks are standard parts, they can be mass-produced quickly and assembled in the factory, saving the complex on-site casting process and significant construction costs. The embedded channel beam 1 itself can serve as a passenger evacuation passage and guardrail, avoiding the need to build a separate escape platform and providing a safe working space for track maintenance. Placing both the F-rail 4 and the power supply rail 5 on the wedge block 3 inside the channel beam 1 fundamentally improves the system's environmental adaptability. Moving the power supply rail 5 from the side of the box girder to the wedge block 3 inside the channel beam 1 makes installation and maintenance more convenient and simple. The use of a precast concrete beam scheme (the entire channel beam 1 is precast, with the embedded steel plate 6 precast into the channel beam 1) allows the base plate 11 to provide load-bearing capacity, eliminating the need for a bridge structure below the track layer and further reducing foundation construction costs. The base plate is supported by an integral structure, allowing maintenance personnel to work on the beams and passengers to descend from the end of the train to the track beams and evacuate safely through emergency escape passages.

[0038] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] In the description of this invention, it should be understood that the terms "center," "height," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A track beam structure for a magnetic levitation line, characterized in that, Includes: a channel beam, and a functional rail assembly mounted on the channel beam via mounting hardware; The cross-section of the channel beam is U-shaped, and the channel beam has two oppositely arranged arc-shaped side beams. The arc-shaped side beams are circular arcs, and the center of the arc-shaped side beams is located at the midpoint of the upper surface of the carriage floor. Each arc-shaped side beam is provided with the functional rail assembly. The mounting component includes a toothed assembly and a wedge. The toothed assembly is mounted on the inner side of the arc-shaped side beam. The toothed assembly is arc-shaped, and its curvature is the same as that of the arc-shaped side beam. The toothed assembly has multiple racks distributed parallel to each other along the vehicle's running direction, with adjacent racks forming a tooth groove. The angle α corresponding to the curvature of the tooth groove is 0.8° to 1°. The wedge is detachably mounted on the toothed assembly. The wedge has multiple inserts, the shape and size of which match the shape and size of the tooth groove. The inserts can be inserted into the tooth groove, allowing the wedge to be mounted on the toothed assembly. The functional rail assembly includes an F rail and a power supply rail, both of which are fixedly mounted on the wedge block.

2. The track beam structure of the magnetic levitation line as described in claim 1, characterized in that, The channel beam includes a base plate, which is connected to the arc-shaped side beams. The base plate has a length of 2690mm to 3600mm and a thickness of 200mm.

3. The track beam structure of the magnetic levitation line as described in claim 1, characterized in that, The channel beam includes an upper flange, which is connected to the arc-shaped side beam. The top of the upper flange is at the same level as the carriage floor. The length of the upper flange is 390mm to 790mm and the thickness is 150mm to 300mm.

4. The track beam structure of the magnetic levitation line as described in claim 1, characterized in that, An embedded steel plate is provided inside the arc-shaped side beam, and the toothed assembly is fixed together with the embedded steel plate by fasteners.

5. The track beam structure of the magnetic levitation line as described in claim 1, characterized in that, Both the toothed assembly and the wedge are made of 40Cr material.

6. The track beam structure of the magnetic levitation line as described in claim 1, characterized in that, The wedge has an installation platform, and the two installation platforms, which are respectively set on the two opposite arc-shaped side beams, are located on the same plane.

7. The track beam structure of the magnetic levitation line as described in claim 1, characterized in that, Both the F-rail and the power supply rail are mounted on the mounting platform. The F-rail faces the center of the channel beam, and the power supply rail is closer to the arc-shaped side beam than the F-rail.

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