Constant-conductance maglev system track structure and installation method thereof

Abstract

A kind of normal magnetic levitation system track structure and its installation method, to effectively reduce the construction cost of magnetic levitation system track structure, track unit can realize accurate positioning and easily realize three-dimensional adjustable, reduce the precision influence caused by the construction error of offline civil foundation, can better adapt to the deformation of offline foundation.Track structure includes track unit and the track foundation for providing support, and fixedly installed in the track unit lateral two sides of the suspension guide rail, the main body of track unit is formed by two longitudinal supporting sleepers with lateral interval and steel rail sleeper with longitudinal interval on it, each steel rail sleeper is fixedly installed on longitudinal supporting sleeper by magnetic levitation fastener.Suspension guide rail is fixedly installed on the length direction end wall of steel rail sleeper by connecting rod in the way of counter-pulling.Track foundation is columnar structure body with longitudinal supporting sleeper downward direction along the line direction interval arrangement, longitudinal supporting sleeper is fixedly connected with columnar body by connecting member.

Description

Technical Field

[0001] This invention relates to track engineering for maglev transportation systems, and particularly to a track structure for a conventional maglev system and its installation method. Background Technology

[0002] Conventional maglev transportation typically employs a short-stator maglev system. The primary coil (stator) of the motor is mounted on the vehicle, while the rotor, similar to a conventional rotating motor, extends along the train's direction of travel and is positioned on the track. The suspension rails are usually designed with an F-shaped cross-section and are fixed to the rails with high-strength bolts to form rail panels. These rail panels are then secured to the track support platform and concrete beams using a fastening system. The track structure of a conventional maglev system is typically based on rail panels, providing the vehicle with drive, levitation, and guidance functions.

[0003] To ensure the geometric state and precision of the track structure, it is necessary to pour rail supports and concrete beams, and to set up a stable track foundation. This results in excessively high construction costs for existing maglev transportation systems, limiting their widespread application. Only a few commercially operating lines have been built in China, including the Shanghai Maglev, Changsha Maglev Express, Beijing Maglev S1, and Phoenix Maglev.

[0004] The invention patent application CN202010471890 discloses a seamless maglev track structure and its construction method. The track structure, from top to bottom, includes a steel truss track panel, a fastening system, a rail support platform, and a concrete box girder. The steel truss track panel includes a suspension guide rail, T-shaped sleepers, and steel rails. The steel rails are longitudinally welded into a continuous length. The fastening system locks the continuous length of the steel rails using a longitudinal, non-limiting fastening method. Adjacent sections of the F-shaped guide rails in a single steel truss track panel are assembled with zero rail gaps. The main design concept of this track structure is to design the medium- and low-speed maglev track panel as seamless and lay it in a seamless track configuration, with zero rail gaps between the track panels. This maximizes the provision of a continuous and flat F-rail suspension detection surface for the suspension gap sensor, ensuring that the suspension control system does not need to cross rail gaps to operate. However, the track structure has the following shortcomings:

[0005] 1. The steel truss rail panel is supported on a rail support platform atop a concrete beam and connected to the concrete beam via a fastener system. The rail support platform needs to be poured on-site, making on-site construction cumbersome, compromising the accuracy of rail panel installation, and hindering cost reduction.

[0006] 2. The steel truss rail panel consists of two rails spaced laterally and several T-shaped sleepers spaced longitudinally. Each T-shaped sleeper comprises a sleeper plate and side and center web plates welded to its bottom surface; the side and center web plates are welded to the rails. Using T-shaped sleepers as load-bearing components results in relatively poor rigidity, necessitating smaller longitudinal spacing. Furthermore, the side and center web plates must be welded to the rails, leading to a large welding workload and making it difficult to guarantee the assembly accuracy and quality of the rail panel.

[0007] 3. The suspended guide rails are installed at both ends of the sleeper plate by vertically set bolts. The suspended guide rails need to be produced by rolling. The track gauge between the two sides of the suspended guide rails is determined by the spacing of the mounting holes on the sleeper plate. This track gauge cannot be adjusted after the rail panel is assembled.

[0008] 4. The rail cross-section is I-shaped. The fastening system locks the entire rail in a longitudinal, non-limiting clamping manner. The vertical height adjustment range is limited. Superelevation on curves is achieved by rotating rail panels and setting different rail support platform heights, which makes on-site construction complicated.

[0009] The aforementioned shortcomings result in excessively high construction costs, difficulties in adjustment, and a large workload for later maintenance and repair of the maglev transportation system. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to provide a track structure for a normal-conducting maglev system, so as to effectively reduce the construction cost of the track structure of the maglev system. The track panel unit can achieve precise positioning and convenient three-dimensional adjustment, reduce the impact of accuracy caused by the construction error of the civil engineering foundation, and better adapt to the deformation of the foundation.

[0011] The technical solution adopted by this invention to solve its technical problem is as follows:

[0012] The present invention discloses a track structure for a conventional maglev system, comprising a track panel unit and a track foundation supporting it, and a suspended guide rail fixedly installed on both sides of the track panel unit. The track panel unit is characterized by the following features: the main body of the track panel unit consists of two longitudinally spaced support sleepers arranged laterally and longitudinally spaced rail sleepers arranged on top of them; each rail sleeper is fixedly installed on the longitudinally spaced support sleepers via maglev fasteners; the suspended guide rails are fixedly installed on the longitudinal end walls of the rail sleepers via connecting rods in a counter-pull manner; the track foundation is a columnar structure spaced along the track direction below the longitudinally spaced support sleepers, and the longitudinally spaced support sleepers are fixedly connected to the columnar structure via connecting members.

[0013] Another technical problem to be solved by the present invention is to provide an installation method for the track structure of a conventional magnetic levitation system, the method comprising the following steps:

[0014] S1. Pass the connecting rod through one side of the suspended guide rail, the rail sleeper and the other side of the suspended guide rail in sequence, and fix the suspended guide rail on the end wall of the rail sleeper in the length direction.

[0015] S2. Install and fix magnetic levitation fasteners on the longitudinal support pillow;

[0016] S3. The rail sleepers are installed on two longitudinal support sleepers using magnetic levitation fasteners to form a rail panel unit;

[0017] S4. Install or construct columnar structures on the foundation;

[0018] S5. Fix the track panel unit to the top of the columnar structure;

[0019] S6. Adjust the track and screw the anti-loosening nut into the magnetic levitation fastener to complete the installation of the track structure.

[0020] The beneficial effects of this invention are mainly reflected in the following aspects:

[0021] 1. The main components of the track panel unit, namely the suspended guide rail, longitudinal support sleeper, and rail sleeper, are connected by a non-welded method, forming a detachable connection through different connecting components. The suspended guide rail is fixedly installed on the longitudinal end wall of the rail sleeper by a connecting rod in a tensioning manner, and the rail sleeper is fixedly installed on the longitudinal support sleeper by magnetic levitation fasteners. This not only facilitates the adjustment of the positional relationship of each component, but also makes it easier to ensure the manufacturing accuracy of each component and the assembly accuracy of the track panel unit, while also helping to reduce production costs.

[0022] 2. The track panel unit can achieve precise positioning. It can be three-dimensionally adjustable by adjusting the shims and magnetic levitation fasteners. This can reduce the impact of accuracy caused by the construction error of the underground civil engineering foundation and better adapt to the deformation of the underground foundation, thereby meeting the requirements of train operation stability.

[0023] 3. The longitudinal support sleepers provide a stable and reliable subgrade foundation for the track panel units, allowing for the installation and use of maglev fasteners with large displacement adjustments to achieve variations in sleeper spacing. Compared to existing maglev track systems, the sleeper spacing can reach 1.6m, further reducing construction costs and subsequent maintenance workload.

[0024] 4. The track panel unit is connected to the foundation through a columnar structure, which simplifies the foundation engineering. Compared with the existing concrete beams and the offline foundation with the rail support platform poured on its top surface, it reduces the amount of concrete, simplifies the construction process, and thus helps to reduce construction costs.

[0025] 5. The main body of the suspended guide rail is made of large-size angle steel, which can be completed by welding two magnetic pole plates. It is simple to manufacture, has good bending resistance, and can produce suspended guide rails of different sizes and specifications according to the actual site conditions. This overcomes the problems of existing suspended guide rails that require integral rolling, are not easy to change in size, and have high costs.

[0026] 6. The installation method is simple, easy, quick and convenient, which can greatly improve the installation efficiency of the track structure of the normal-conducting maglev system. Attached Figure Description

[0027] This instruction manual includes the following seven figures:

[0028] Figure 1 This is a cross-sectional view of Embodiment 1 of the track structure of a normal-conducting magnetic levitation system according to the present invention;

[0029] Figure 2 This is a plan view of the track structure of a conventional magnetic levitation system according to the present invention;

[0030] Figure 3 This is a cross-sectional view of the suspended guide rail in the track structure of a normal-conducting magnetic levitation system according to the present invention;

[0031] Figure 4 This is an overall schematic diagram of the steel sleeper in the track structure of a normal-conducting maglev system according to the present invention;

[0032] Figure 5 This is a cross-sectional view of a steel sleeper in the track structure of a normal-conducting maglev system according to the present invention;

[0033] Figure 6 This is an assembly diagram of the magnetic levitation fastener in the track structure of a normal-conducting magnetic levitation system according to the present invention;

[0034] Figure 7 This is a cross-sectional view of a second embodiment of the track structure of a normal-conducting maglev system according to the present invention.

[0035] The diagram shows the names and markings of the main components: rail sleeper 10, fixing plate 11, rib plate 12, positioning arc 13, mounting hole 14, adjusting shim 15, connecting rod 20, high-strength nut 21, suspension guide rail 30, magnetic pole plate 31, magnetic levitation fastener 40, fixing bolt 41, longitudinal support sleeper 50, connecting plate 51, steel column 60, base plate 61, anchor bolt 70, concrete column 80, and embedded bolt 90. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] Reference Figure 1 , Figure 2 and Figure 7The present invention discloses a track structure for a conventional maglev system, comprising a track panel unit, a track foundation providing support for the track panel, and suspended guide rails 30 fixedly installed on both transverse sides of the track panel unit. The main body of the track panel unit consists of two transversely spaced longitudinal support sleepers 50 and longitudinally spaced rail sleepers 10 mounted thereon. Each rail sleeper 10 is fixedly mounted on the longitudinal support sleeper 50 by magnetic levitation fasteners 40. The suspended guide rails 30 are fixedly mounted on the longitudinal end walls of the rail sleepers 10 by connecting rods 20 in a tension-resistance manner. The track foundation is a columnar structure spaced along the track direction below the longitudinal support sleepers 50, and the longitudinal support sleepers 50 are fixedly connected to the columnar structure by connecting members. The main components of the track panel unit, namely the suspended guide rail 30, the longitudinal support sleeper 50, and the rail sleeper 10, are connected in a non-welded manner, forming a detachable connection through different connecting components. The suspended guide rail 30 is connected to the rail sleeper 10 by a connecting rod 20 in a pull-out manner, and the rail sleeper 10 is fixedly installed on the longitudinal support sleeper by a magnetic levitation fastener 40. This not only facilitates the adjustment of the positional relationship of each component, but also makes it easier to ensure the manufacturing accuracy of each component and the assembly accuracy of the track panel unit, while also helping to reduce production costs.

[0038] Reference Figure 4 and Figure 5 The main body of the rail sleeper 10 is made of I-beam profile, having a top plate, a bottom plate, and a web plate. Fixing plates 11 are welded to both ends along its length. Ribs 12 are spaced apart along the length of both sides of the web plate, and each rib 12 is welded to the top plate, bottom plate, and web plate. Alternatively, the main body of the rail sleeper 10 is formed by welding a top plate, a bottom plate, and two web plates spaced apart along the width direction, with a cross-section in the shape of an "Y". Fixing plates 11 are welded to both ends along its length. Ribs 12 are spaced apart along the length of the web plate, and each rib 12 is welded to the top plate, bottom plate, and web plate. Considering both minimizing the manufacturing difficulty and cost of the rail sleeper 10, the former structural method is preferred. Mounting holes 14 for the connecting rod 20 to pass through are provided on the fixing plate 11 and the rib plate 12. The mounting holes 14 are arranged longitudinally and vertically at intervals on the fixing plate 11 and vertically at intervals on the rib plate 12 respectively. Positioning arcs 13 that cooperate with the magnetic levitation fastener 40 are provided on both sides of the width direction of the base plate.

[0039] Reference Figure 3 and Figure 1The main body of the suspended guide rail 30 is made of angle steel profile, with two magnetic pole plates 31 welded laterally at intervals on the bottom surface of its horizontal plate. This design is simple to manufacture, has good bending resistance, and allows for the production of suspended guide rails of different sizes and specifications according to actual site conditions. This overcomes the problems of existing suspended guide rails requiring integral rolling, having difficulty changing dimensions, and incurring high costs. Through holes corresponding to the mounting holes 14 on the fixing plate 11 are provided on the vertical plate of the angle steel profile. When assembling the rail panel unit, the connecting rod 20 passes laterally through the through holes of the suspended guide rail 30 and the mounting holes 14 of the rail sleeper 10 along the rail panel unit. The suspended guide rail 30 is then fixed to the longitudinal end wall of the rail sleeper 10 via the threads at both ends of the connecting rod 20 and matching high-strength nuts 21. This tensioning method effectively ensures the stability of the suspended guide rail 30 connection.

[0040] Reference Figure 1 Adjustment shims 15 can be installed between the vertical plate of the suspended guide rail 30 and the end wall of the rail sleeper 10 along the length direction. The track gauge of the two sides of the suspended guide rail 30 can be adjusted by adjusting the shims 15. The setting of the adjustment shims 15 provides both elasticity and track gauge adjustment capability.

[0041] Reference Figure 1 , Figure 6 The longitudinal support sleeper 50 adopts a rectangular annular cross-section profile, providing a stable and sound subgrade foundation for the track panel unit. It allows for the installation and use of magnetic levitation fasteners with large displacement adjustments, enabling variations in sleeper spacing. Compared to existing maglev track systems, the sleeper spacing can reach 1.6m, further reducing construction costs and subsequent maintenance workload. Vertical through holes are spaced along the longitudinal direction on the longitudinal support sleeper 50. Magnetic levitation fasteners 40 are fixedly installed on the top surface of the longitudinal support sleeper 50 using bolts 41 passing through these holes. The magnetic levitation fasteners 40 are elastic, split fasteners with longitudinal and lateral adjustability, and their elastic strips press against the bottom plate of the sleeper 10.

[0042] Reference Figure 1 In the illustrated embodiment 1, the columnar structure is a steel column 60. A base plate 61 is welded to the lower end of the steel column 60, and the steel column 60 is fixedly installed on the foundation using anchor bolts 70. The longitudinal support pillow 50 is welded to the top plate of the steel column 60, or forms a detachable connection with the steel column 60 through connecting components, thereby fixing the track panel unit onto the steel column 60. The foundation is treated with simple engineering methods, reducing the volume of concrete compared to existing concrete beams and the sub-foundations with cast-in-place rail supports on their top surfaces, simplifying the construction process, and thus reducing construction costs.

[0043] Reference Figure 2In the illustrated embodiment 2, the columnar structure is a cast-in-place concrete column 80. A connecting plate 51 is welded to the bottom of the connection between the longitudinal support sleeper 50 and the concrete column 80. Pre-embedded bolts 90 are installed at the top of the concrete column 80, passing through the connecting plate 51 to fix the rail panel unit onto the concrete column 80. Compared to existing concrete beams and rail supports, this embodiment still significantly reduces the amount of cast-in-place concrete.

[0044] Reference Figure 1 and Figure 7 The present invention discloses an installation method for a track structure of a conventional magnetic levitation system, comprising the following steps:

[0045] S1. Pass the connecting rod 20 through the suspension guide rail 30 on one side, the rail sleeper 10 and the suspension guide rail 30 on the other side in sequence, and fix the suspension guide rail 30 on the end wall of the rail sleeper 10 in the length direction.

[0046] S2. Install and fix the magnetic levitation fastener 40 on the longitudinal support pillow 50;

[0047] S3. The rail sleeper 10 is installed on the two longitudinal support sleepers 50 by magnetic levitation fasteners 40 to form a rail panel unit;

[0048] S4. Install or construct columnar structures on the foundation;

[0049] S5. Fix the track panel unit to the top of the columnar structure;

[0050] S6. Adjust the track and screw the anti-loosening nut into the magnetic levitation fastener 40 to complete the track structure installation.

[0051] The installation method is simple, quick, and convenient, which can significantly improve the installation efficiency of the track structure of the conventional maglev system. Large displacement adjustment can be achieved through the maglev fastener 40, and the track gauge of the two side suspension guide rails 30 can be adjusted directionally through the adjusting shims 15. Therefore, the track structure can be adjusted in three directions: longitudinal, lateral, and vertical, which can better adapt to the deformation of the subgrade foundation and thus meet the requirements of train operation stability.

[0052] The above description is merely an illustration of some principles of the track structure and installation method of a normal-conducting maglev system according to the present invention, and is not intended to limit the present invention to the specific structure and applicable scope shown and described. Therefore, all possible modifications and equivalents are within the scope of the patent application of the present invention.

Claims

1. A track structure for a conventional maglev system, comprising a track panel unit and a track foundation supporting it, and suspended guide rails (30) fixedly installed on both sides of the track panel unit laterally, characterized in that: The main body of the track panel unit is composed of two longitudinal support sleepers (50) arranged at a transverse interval and rail sleepers (10) arranged at a longitudinal interval thereon. Each rail sleeper (10) is fixedly installed on the longitudinal support sleeper (50) through a maglev fastener (40); the suspension guide rail (30) is fixedly installed on the end wall in the length direction of the rail sleeper (10) in a tensioned manner through a connecting rod (20); the subgrade under the track is a columnar structure arranged at intervals along the line direction under the longitudinal support sleeper (50), and the longitudinal support sleeper (50) forms a fixed connection with the columnar body through a connecting member.

2. The track structure of a conventional maglev system as described in claim 1, characterized in that: The main body of the rail sleeper (10) adopts an I-beam profile, which has a top plate, a bottom plate and a middle web. Fixed plates (11) are welded at both ends in its length direction, and rib plates (12) are arranged at intervals along the outer edges of both sides of the middle web in the length direction. Each rib plate (12) is welded to the top plate, the bottom plate and the middle web.

3. The track structure of a conventional maglev system as described in claim 1, characterized in that: The main body of the rail sleeper (10) is welded by a top plate, a bottom plate and two webs arranged at intervals in the width direction, and its cross section is sub-shaped. Fixed plates (11) are welded at both ends in its length direction; rib plates (12) are arranged at intervals along the outer sides of the webs in the length direction. Each rib plate (12) is welded to the top plate, the bottom plate and the web.

4. The track structure of a conventional maglev system as described in claim 2 or 3, characterized in that: Mounting holes (14) for the connecting rod (20) to pass through are arranged on the fixed plates (11) and the rib plates (12). The mounting holes (14) are arranged at longitudinal and vertical intervals on the fixed plates (11), and are arranged at corresponding vertical intervals on the rib plates (12); positioning arcs (13) matching the maglev fasteners (40) are arranged on both sides in the width direction of the bottom plate.

5. The track structure of a conventional maglev system as described in claim 4, characterized in that: The main body of the suspension guide rail (30) adopts an angle steel profile. Two magnetic pole plates (31) are welded at a transverse interval on the bottom surface of its horizontal plate, and through holes corresponding to the mounting holes (14) on the fixed plates (11) are arranged on its vertical plate; after the connecting rod (20) passes through the through holes of the suspension guide rail (30) and the mounting holes (14) of the rail sleeper (10) along the transverse direction of the track panel unit, the suspension guide rail (30) is fixedly installed on the end wall in the length direction of the rail sleeper (10) through the threads at both ends of the connecting rod (20) and matching high-strength nuts (21).

6. The track structure of a conventional maglev system as described in claim 5, characterized in that: Adjusting gaskets (15) are installed between the vertical plate of the suspension guide rail (30) and the end wall in the length direction of the rail sleeper (10) for adjusting the gauge of the two suspension guide rails (30).

7. The track structure of a conventional maglev system as described in claim 4, characterized in that: The longitudinal support sleeper (50) adopts a rectangular ring-section profile, and vertical through holes are arranged at longitudinal intervals thereon. The maglev fasteners (40) are fixedly installed on the top surface of the longitudinal support sleeper (50) by fixing bolts (41) passing through the vertical through holes; the maglev fasteners (40) adopt elastic separated fasteners, and their elastic bars form a clamping force on the bottom plate of the rail sleeper (10).

8. The track structure of a conventional maglev system as described in claim 1, characterized in that: The columnar structure is a steel column (60). A base plate (61) is welded at the lower end of the steel column (60), and the steel column (60) is fixedly installed on the foundation through anchor bolts (70); the longitudinal support sleeper (50) is welded to the top plate of the steel column (60), or forms a detachable connection with the steel column (60) through a connecting member to fixedly install the track panel unit on the steel column (60).

9. The track structure of a conventional maglev system as described in claim 1, characterized in that: The column structure is a concrete column (80) cast in place on the foundation. A connecting plate (51) is welded to the bottom of the connection between the longitudinal support pillow (50) and the concrete column (80). An embedded bolt (90) is set on the top of the concrete column (80). The embedded bolt (90) passes through the connecting plate (51) to fix the track panel unit on the concrete column (80).

10. The installation method of the track structure of a normal-conducting maglev system as described in claim 1, comprising the following steps: S1. Pass the connecting rod (20) through the suspension guide rail (30) on one side, the sleeper (10) and the suspension guide rail (30) on the other side in sequence, and fix the suspension guide rail (30) on the end wall of the sleeper (10) in the length direction. S2. Install and fix the magnetic levitation fastener (40) on the longitudinal support pillow (50); S3. The rail sleeper (10) is installed on the two longitudinal support sleepers (50) by magnetic levitation fastener (40) to form a rail panel unit; S4. Install or construct columnar structures on the foundation; S5. Fix the track panel unit to the top of the columnar structure; S6. Adjust the track and screw the anti-loosening nut into the magnetic levitation fastener (40) to complete the track structure installation.

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