Magnetic levitation transportation track connecting structure and magnetic levitation transportation track

Abstract

The application provides a maglev traffic track connecting structure and a maglev traffic track, and relates to the technical field of maglev traffic. The connecting structure comprises a through sleeve, a long bolt, an elastic pad group and a fastening assembly. The through sleeve is arranged through the thickness direction of the concrete cover plate. The long bolt passes through the track, the through sleeve and the induction core in sequence. The elastic pad group comprises a first elastic washer arranged between the top end of the through sleeve and the induction core and a second elastic washer arranged between the bottom end of the through sleeve and the track. The fastening assembly comprises a nut threadedly matched with the end of the long bolt, and the track and the induction core are fixed on the upper and lower sides of the concrete cover plate by screwing the nut. The connecting structure is simple and reliable, has good stress condition and is convenient to operate and maintain. On the one hand, the track is closely combined with the bottom end face of the concrete cover plate, and the long bolt has good stress condition and is not prone to shear failure. On the other hand, on the basis of realizing adjustable precision, the induction core and the track have low difficulty and cost in replacement.

Description

Technical Field

[0001] This utility model relates to the field of maglev transportation technology, and in particular to a maglev transportation track connection structure and a maglev transportation track. Background Technology

[0002] Currently, the medium- and low-speed maglev lines already in operation with speeds below 160 km / h primarily employ traditional bridge structures such as simply supported beams or U-shaped beams, lacking an integrated beam-track architecture. This results in low construction efficiency, excessive system stiffness, and difficulty in ensuring track accuracy. Furthermore, the track structures typically use F-type tracks, which are more complex in design and have higher raw material and manufacturing costs. Therefore, effectively reducing the overall cost of bridge and track structures is crucial for promoting the wider application of high-speed maglev transportation systems.

[0003] In existing technologies, maglev tracks are mainly constructed by laying medium- and low-speed maglev track panels as integral units. These track panels include induction plates, F-shaped steel, H-shaped steel sleepers, and corresponding connectors and fasteners, laid as jointed railways. The maglev track not only needs to bear and transmit the train's gravity, guiding force, driving force, and braking force, but also needs to cooperate with electromagnets, linear induction motors, and sensors installed on the train to form electromagnetic and control loops to achieve functions such as levitation, guidance, driving, and braking. The track support platform serves as the interface between the track and the track beam, responsible for transmitting the longitudinal and lateral forces of the track structure to the underlying foundation.

[0004] To overcome the shortcomings of traditional medium- and low-speed maglev track structures in terms of construction efficiency, structural rigidity, and cost control, and to promote the engineering application of high-speed maglev technology, the industry has proposed the technical direction of "beam-track integration".

[0005] The integrated beam-track design aims to simplify traditional complex structures. Its core lies in eliminating the rail support platform and H-shaped sleepers, simplifying the functional components of the F-shaped track, and casting and installing it together with the concrete beam (similar to ballastless track in wheel-rail transportation). By integrating the originally scattered track panel components into the concrete beam, on-site assembly can be effectively reduced, construction efficiency improved, and the stress path optimized through structural integration, reducing system complexity and life-cycle costs.

[0006] Existing technical solutions (such as Chinese patent CN120505833A) embody the aforementioned integrated beam-rail concept, eliminating the rail support platform and H-shaped sleepers, and casting the simplified F-rail functional components together with the concrete beam. Specifically, as... Figure 1As shown, patent CN120505833A discloses a maglev transportation track structure and its construction method, including a bridge deck 1-2, a maglev track assembly 2, and an induction plate assembly 3. The maglev track assembly 2 includes a maglev track, a hexagonal nut, a washer, a thin nut, and a screw. The induction plate assembly 3 includes an iron core, an aluminum plate, shear studs, and screws. The iron core is vertically welded to the shear studs, which are cast and anchored to the bridge deck 1-2 as a whole. The iron core is located on the upper surface of the bridge deck 1-2, and the aluminum plate is installed on the upper surface of the iron core by screws. The construction method includes modular casting of the prefabricated bridge deck 1-2 in a factory — installation and adjustment of the maglev in the factory — re-measurement of the maglev track's levelness and straightness — on-site installation of the bridge deck 1-2. Although this patent can achieve low-cost track installation, it has two key defects in practical applications, which limit its widespread adoption:

[0007] (1) The U-shaped track and the beam plate are not tightly fitted. Under the action of train traction, the shear force is entirely applied to the screw installed in the pre-embedded inverted conical sleeve, which can easily lead to the failure or breakage of the screw, seriously threatening the safety of train operation.

[0008] (2) The iron core on the beam plate is fixed to the beam plate by welding shear nails. However, if the iron core is damaged during operation, it cannot be disassembled and replaced separately because it is fixed to the beam plate. The entire beam plate must be replaced, resulting in high replacement costs. Utility Model Content

[0009] To address the problems of screw failure, breakage, and inconvenient operation and maintenance caused by the failure of the U-shaped track and the beam plate to fit tightly, this utility model aims to provide a maglev transportation track connection structure with reliable connection and convenient operation and maintenance, and a maglev transportation track including the maglev transportation track connection structure.

[0010] A maglev train track connection structure is provided for connecting the track and the induction core to the upper and lower sides of a concrete cover plate, respectively. The maglev train track connection structure includes:

[0011] A through-type sleeve is provided, extending through the thickness of the concrete cover plate;

[0012] A long bolt passes sequentially through the track, the through sleeve, and the induction core;

[0013] The elastic pad assembly includes a first elastic pad and a second elastic pad. The first elastic pad is disposed between the top end of the through sleeve and the induction core, and the second elastic pad is disposed between the bottom end of the through sleeve and the track.

[0014] The fastening assembly includes a nut that is threaded to the end of the long bolt, which secures the track and the induction core to the upper and lower sides of the concrete cover plate by tightening the nut.

[0015] Furthermore, the fastening assembly also includes a locking washer disposed between the nut and the track.

[0016] Furthermore, the through-type sleeve is a PVC sleeve.

[0017] Furthermore, both the first elastic gasket and the second elastic gasket are rubber gaskets.

[0018] On the other hand, this utility model also provides a maglev transportation track, comprising:

[0019] The magnetic levitation transportation track connection structure as described in any of the above embodiments;

[0020] Concrete components, including vertically arranged concrete slabs and concrete beams;

[0021] A pair of tracks are symmetrically arranged on both sides of the bottom of the concrete cover plate, and are tightly fitted to the bottom of the concrete cover plate through the magnetic levitation transportation track connection structure;

[0022] A pair of induction iron cores are symmetrically arranged on both sides of the top of the concrete cover plate, and are tightly fitted to the top of the concrete cover plate through the connection.

[0023] Furthermore, the track is an inverted U-shaped composite track, which is composed of multiple bent steel plates stacked together.

[0024] Furthermore, the maglev transportation track also includes a skid, which is a long strip of steel plate with shear studs welded vertically to its bottom; the skid is anchored to the concrete cover plate by the shear studs.

[0025] Furthermore, the maglev transportation track also includes an aluminum induction plate, which is detachably connected to the induction core.

[0026] Furthermore, the track on each side and the induction core are connected in the track width direction by at least two of the magnetic levitation transportation track connection structures.

[0027] Furthermore, the concrete cover plate and the concrete beam are either cast separately or cast as a whole.

[0028] Compared with the prior art, the maglev transportation track connection structure provided by this utility model embodiment has at least the following technical effects:

[0029] The maglev rail connection structure connects the track and the induction core to the upper and lower sides of a concrete cover plate, respectively. The structure includes a through-sleeve, long bolts, elastic pads, and fastening components. The through-sleeve extends along the thickness of the concrete cover plate. The long bolts pass sequentially through the track, the through-sleeve, and the induction core. The elastic pads include a first elastic washer and a second elastic washer. The first elastic washer is located between the top of the through-sleeve and the induction core, and the second elastic washer is located between the bottom of the through-sleeve and the track. The fastening components include nuts that thread with the ends of the long bolts. Tightening the nuts fixes the track and the induction core to the upper and lower sides of the concrete cover plate. The maglev rail connection structure provided in this embodiment is simple, reliable, has good stress conditions, and is relatively convenient to maintain. On the one hand, the track fits tightly against the bottom surface of the concrete cover plate, resulting in good stress conditions for the long bolts and reducing the likelihood of shear failure. On the other hand, while achieving adjustable accuracy, the replacement of the induction core and track is relatively simple and cost-effective, which is beneficial for the engineering application and promotion of rapid maglev transportation technology.

[0030] Since the maglev transportation track includes the maglev transportation track connection structure described in the above embodiments, it at least possesses the technical effects of the maglev transportation track connection structure described in the above embodiments, which will not be elaborated here. Attached Figure Description

[0031] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of an existing maglev transportation track.

[0033] Figure 2 This is a schematic diagram of the overall structure of a maglev transportation track in one embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the main structure of a maglev transportation track in one embodiment of the present invention;

[0035] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0036] Figure label:

[0037] 11. Through sleeve; 12. Long bolt; 131. First elastic washer; 132. Second elastic washer; 141. Nut; 142. Locking washer; 20. Rail; 21. First bent steel plate; 22. Second bent steel plate; 23. Third bent steel plate; 30. Induction core; 41. Concrete cover plate; 42. Concrete beam; 50. Skid plate; 51. Shear stud; 60. Aluminum induction plate. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0040] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification 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 conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0041] Please refer to the attached document. Figure 2 To be continued Figure 4 As shown, one embodiment of this utility model provides a maglev transportation track, including a maglev transportation track connecting structure, a concrete component, a pair of tracks 20, and a pair of induction iron cores 30; the concrete component includes a vertically arranged concrete cover plate 41 and a concrete beam 42; the pair of tracks 20 are symmetrically arranged on both sides of the bottom of the concrete cover plate 41 and are tightly fitted to the bottom of the concrete cover plate 41 through the maglev transportation track connecting structure; the pair of induction iron cores 30 are symmetrically arranged on both sides of the top of the concrete cover plate 41 and are tightly fitted to the top of the concrete cover plate 41 through the maglev transportation track connecting structure.

[0042] It should be further explained that the maglev transportation track connection structure is used to connect the track 20 and the induction core 30 to the upper and lower sides of the concrete cover plate 41, respectively. The maglev transportation track connection structure includes a through sleeve 11, a long bolt 12, an elastic pad assembly, and a fastening assembly. The through sleeve 11 is installed through the concrete cover plate 41 along its thickness direction. The long bolt 12 passes through the track 20, the through sleeve 11, and the induction core 30 in sequence. The elastic pad assembly includes a first elastic washer 131 and a second elastic washer 132. The first elastic washer 131 is located between the top of the through sleeve 11 and the induction core 30, and the second elastic washer 132 is located between the bottom of the through sleeve 11 and the track 20. The fastening assembly includes a nut 141 that is threaded to the end of the long bolt 12. By tightening the nut 141, the track 20 and the induction core 30 are fixed to the upper and lower sides of the concrete cover plate 41.

[0043] In this embodiment, the long bolt 12 passes sequentially through the track 20, the through sleeve 11, and the induction core 30. Combined with the first elastic washer 131 and the second elastic washer 132, and using the tightening force of the nut 141, the track 20, the concrete cover plate 41, and the induction core 30 are tightly connected as a single unit, achieving a low-cost integrated beam-track design. Simultaneously, under the traction force of the train, the shear force can be effectively transferred to the concrete cover plate 41, thereby optimizing the stress distribution and avoiding the risk of failure or breakage of the connecting bolt due to excessive shear force in existing technologies, thus improving connection reliability and structural stability. Furthermore, the induction core 30 is fixed above the concrete cover plate 41 by the long bolt 12, the through sleeve 11, and the nut 141, forming a detachable modular structure. When the induction core 30 is damaged, maintenance personnel only need to loosen the nut 141 to replace the damaged core individually, without needing to replace the entire concrete cover plate 41, thereby effectively reducing maintenance costs.

[0044] In summary, the maglev transportation track connection structure provided in this embodiment is simple and reliable, with good stress conditions and convenient operation and maintenance. On the one hand, the track 20 fits tightly with the bottom end face of the concrete cover plate 41, and the long bolt 12 has good stress conditions, making it less prone to shear failure. On the other hand, while achieving adjustable accuracy, the replacement difficulty and cost of the induction core 30 and track 20 are low, which is conducive to the engineering application and promotion of rapid maglev transportation technology.

[0045] In some optional embodiments, the compression of the first elastic washer 131 and the second elastic washer 132 is adjustable, and the installation accuracy of the track 20 is achieved through the adjustable compression of the first elastic washer 131 and the second elastic washer 132. Specifically, by adjusting the tightness of the nut 141, the compression of the first elastic washer 131 and the second elastic washer 132 can be adjusted, thereby adjusting the installation accuracy of the track 20.

[0046] In some optional embodiments, the fastening assembly further includes a locking washer 142 disposed between the nut 141 and the track 20. By providing the locking washer 142, the possibility of the nut 141 loosening due to vibration or other external forces is effectively reduced, thereby ensuring a more secure connection between the track 20 and the concrete cover plate 41.

[0047] In some optional embodiments, the through sleeve 11 is a PVC sleeve. The PVC sleeve has excellent corrosion resistance and aging resistance, enabling it to maintain structural stability during long-term use. Its specifications can be flexibly adjusted according to actual needs, and its length can be adapted to the thickness of the concrete cover plate 41. For example, the PVC sleeve has specifications of DN25×1.6mm and a length of 138mm.

[0048] In some optional embodiments, both the first elastic gasket 131 and the second elastic gasket 132 are rubber gaskets. The specifications and compression amount of the rubber gaskets can be flexibly adjusted according to actual needs, and there are no specific limitations. For example, the thickness of the rubber gasket is 2mm, and the compression amount during installation is 1mm.

[0049] In some optional embodiments, the track 20 is an inverted U-shaped composite track, composed of multiple bent steel plates stacked together. Compared with a solid track, the inverted U-shaped composite track is easier to bend and less expensive. The thickness of the inverted U-shaped composite track can be flexibly adjusted according to actual needs. In a specific embodiment, the inverted U-shaped composite track is composed of three bent steel plates stacked together, specifically a first bent steel plate 21, a second bent steel plate 22, and a third bent steel plate 23, resulting in an inverted U-shaped composite track with a thickness of 140mm.

[0050] It should be further noted that the thickness of the induction core 30 can be flexibly adjusted according to actual needs. In a specific embodiment, the thickness of the induction core 30 is 20mm, and it is provided with a 10mm countersunk hole.

[0051] In some optional embodiments, the maglev train track also includes a skid plate 50, which is a long strip of steel plate with a thickness of not limited to 10 mm, and shear studs 51 are vertically welded to its bottom. The skid plate 50 is integrally anchored to the concrete cover plate 41 by the shear studs 51. The skid plate 50 is designed for use when the maglev train disembarks or encounters an emergency. It can effectively distribute the weight of the train by sliding and provide temporary support to prevent the train from tilting excessively or damaging the track structure.

[0052] In some optional embodiments, the maglev train track also includes an aluminum induction plate 60, which is detachably connected to the induction core 30, facilitating the maintenance and replacement of both. The aluminum induction plate 60 and the induction core 30 can be connected using pins or screws. The aluminum induction plate 60 and the induction core 30 are components used for train traction and braking in the maglev train.

[0053] In some optional embodiments, each side of the track 20 and the induction core 30 are connected in the width direction of the track 20 by at least two maglev rail connection structures, so that the track 20 and the induction core 30 are tightly and securely connected. For example, each side of the track 20 and the induction core 30 are connected in the width direction of the track 20 by two maglev rail connection structures.

[0054] In some optional embodiments, the concrete cover plate 41 and the concrete beam 42 are either cast separately or cast as a whole, which can be flexibly selected according to construction requirements.

[0055] In this utility model, the construction method of the maglev transportation track includes the following steps:

[0056] The induction core 30, the through sleeve 11, the first elastic washer 131, the second elastic washer 132 and the track 20 are pre-tightened with long bolts 12 and nuts 141 to form a track assembly component;

[0057] The track assembly components and skid 50 are fixed in the casting mold, and a steel cage is placed in the casting mold;

[0058] The installation accuracy of the track assembly components is measured. The compression of the first elastic washer 131 and the second elastic washer 132 is changed by adjusting the tightness of the nut 141, so as to achieve fine adjustment of the installation accuracy and meet the requirements of train operation.

[0059] Concrete is poured into the casting mold, and after the concrete has solidified and cured, it is demolded to form a track structure that is integrated with the concrete component.

[0060] After the concrete component has stabilized, the aluminum induction plate 60 is installed onto the induction core 30. It is worth noting that the aluminum induction plate 60 can be installed after the concrete component has stabilized, or it can be installed after the induction core 30, the through sleeve 11, the first elastic gasket 131, the second elastic gasket 132 and the track 20 have been pre-tightened with long bolts 12 and nuts 141.

[0061] Retest the accuracy of the track structure. If it does not meet the requirements, adjust the tightness of nut 141 again.

[0062] It should be further explained that before the induction core 30, through sleeve 11, first elastic gasket 131, second elastic gasket 132 and track 20 are pre-tightened with long bolts 12 and nuts 141 to form track assembly components, a casting mold can be made first to facilitate the casting of concrete cover plate 41 or integral concrete component including concrete cover plate 41.

[0063] In some optional embodiments, during the step of forming the track assembly components, the joints between the through sleeve 11 and the first elastic gasket 131, as well as the joints between the through sleeve 11 and the second elastic gasket 132, are sealed with adhesive to prevent cement mortar from seeping into the joints during the grouting process and affecting the connection structure of the maglev transportation track.

[0064] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A magnetic levitation transportation track connection structure for connecting the track and the induction core to the upper and lower sides of a concrete cover plate, characterized in that, The maglev transportation track connection structure includes: A through-type sleeve is provided, extending through the thickness of the concrete cover plate; A long bolt passes sequentially through the track, the through sleeve, and the induction core; The elastic pad assembly includes a first elastic pad and a second elastic pad. The first elastic pad is disposed between the top end of the through sleeve and the induction core, and the second elastic pad is disposed between the bottom end of the through sleeve and the track. The fastening assembly includes a nut that is threaded to the end of the long bolt, which secures the track and the induction core to the upper and lower sides of the concrete cover plate by tightening the nut.

2. The maglev transportation track connection structure according to claim 1, characterized in that, The fastening assembly also includes a locking washer disposed between the nut and the track.

3. The maglev transportation track connection structure according to claim 1, characterized in that, The through-type sleeve is a PVC sleeve.

4. The maglev transportation track connection structure according to claim 1, characterized in that, Both the first elastic gasket and the second elastic gasket are rubber gaskets.

5. A maglev transportation track, characterized in that, include: The maglev transportation track connection structure as described in any one of claims 1 to 4; Concrete components, including vertically arranged concrete slabs and concrete beams; A pair of tracks are symmetrically arranged on both sides of the bottom of the concrete cover plate, and are tightly fitted to the bottom of the concrete cover plate through the magnetic levitation transportation track connection structure; A pair of induction iron cores are symmetrically arranged on both sides of the top of the concrete cover plate, and are tightly fitted to the top of the concrete cover plate through the connection.

6. The maglev transportation track according to claim 5, characterized in that, The track is an inverted U-shaped composite track, which is composed of multiple bent steel plates stacked together.

7. The maglev transportation track according to claim 5, characterized in that, It also includes a skid plate, which is a long strip of steel plate with shear studs welded vertically to the bottom; the skid plate is anchored to the concrete cover plate by the shear studs.

8. The maglev transportation track according to claim 5, characterized in that, It also includes an aluminum sensing plate, which is detachably connected to the sensing iron core.

9. The maglev transportation track according to claim 5, characterized in that, The track on each side and the induction core are connected in the track width direction by at least two of the maglev transportation track connection structures.

10. The maglev transportation track according to claim 5, characterized in that, The concrete cover plate and the concrete beam are either cast separately or cast as a whole.

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