High-elasticity amplitude-modulated continuous support fastener for winged-sleeper ballastless track

Abstract

Provided is a high-elasticity amplitude-modulated continuous support fastener for a winged-sleeper ballastless track, belonging to the technical field of track transportation. The winged-sleeper ballastless track comprises a track bed and winged sleepers arranged along the track bed in a longitudinal direction, and the two sides of a steel rail are clamped and supported on the winged sleepers by the continuous support fastener. The continuous support fastener comprises a clamping assembly, an adjusting assembly and an elastic support assembly. The gauge block and gauge baffle are combined to adjust the gauge, the coupling positioning pad, the height-adjusting pad and the gauge baffle are combined to adjust the rail height, and the wedge-shaped slope pad adjusts the longitudinal difference between adjacent track plates, thereby achieving precise adjustment of the gauge, the rail height and the longitudinal difference. The elastic support assembly provides continuous elastic support for the steel rail, and the spiral spikes in the clamping assembly press the type II elastic strip against the gauge block and the gauge baffle. The utility model solves the problems of uneven stiffness, insufficient adjusting capacity and poor vibration reduction performance of conventional ballastless track fasteners.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit technology, specifically relating to a high-elasticity, amplitude-adjustable continuous support fastener for ballastless track with winged sleepers, applicable to high-speed railways and urban rail transit systems. Background Technology

[0002] Currently, ballastless track structures are classified into three types: embedded sleeper ballastless track, slab ballastless track, and elastically supported block ballastless track. The most commonly used types in China's high-speed railways are CRTSI, II, and III type slab ballastless track and CRTS I and II type double-block ballastless track. Among these three types, embedded sleeper ballastless track and elastically supported block ballastless track use cast-in-place monolithic track beds; slab ballastless track uses prestressed concrete precast slab track beds.

[0003] High-speed railway ballastless tracks are mostly used in seamless tracks, requiring fasteners to have sufficient clamping force; ballastless track foundations have high rigidity, requiring fasteners to have a certain degree of elasticity; ballastless tracks cannot be raised or shifted, requiring fasteners to be able to adjust elevation, level, and slope. Therefore, in ballastless track structures, fasteners are essentially the sole provider of track elasticity and gauge / level adjustment capabilities, making their structure crucial for innovative ballastless track design. Although commonly used fasteners in domestic high-speed railways are widely applied, the following problems still exist: 1. Uneven stiffness of fastener nodes: Traditional fasteners cause periodic changes in stiffness due to the equal spacing of sleepers, which can easily lead to track irregularities and wavy wear of the rails.

[0004] 2. Limited adjustment range and height adjustment capability: The existing fasteners have a small adjustment range and are difficult to adapt to complex track conditions such as transition curves, tunnel and bridge sections, and transition sections.

[0005] 3. Insufficient vibration reduction performance: The existing structure has limited effect on suppressing the transmission of wheel-rail vibration and secondary structural noise, which affects the surrounding environment.

[0006] To address the aforementioned issues, there is an urgent need for a fastener structure that can simultaneously provide continuous support, multi-directional adjustment, and vibration and noise reduction. Utility Model Content

[0007] The technical problem solved by this utility model is to provide a high-elasticity, amplitude-adjustable continuous support fastener for ballastless track with winged sleepers. This utility model solves the problems of uneven stiffness, insufficient adjustment capacity and poor vibration reduction performance of traditional ballastless track fasteners.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-elasticity, amplitude-adjustable continuous support fastener for ballastless track with winged sleepers, comprising: The ballastless track with winged sleepers includes a track bed and winged sleepers arranged longitudinally along the track bed. The winged sleepers are provided with shoulders on both sides and embedded sleeves are provided on the rail bearing platform of the winged sleepers. The rails are fastened and supported on winged sleepers by continuous support fasteners on both sides; Continuous support fastener, including a clamping assembly, an adjusting assembly, and a flexible support assembly; The adjustment component includes: The coupling positioning pad, the height adjustment pad, and the lower height adjustment pad under the gauge baffle are used to adjust the rail height. The coupling positioning pad and the height adjustment pad are placed under the rail, and the lower height adjustment pad under the gauge baffle is placed on both sides of the height adjustment pad. The three are combined to adjust the rail height. The wedge-shaped slope pad is placed between the coupling positioning pad and the height adjustment pad to adjust the longitudinal drop between adjacent track slabs; Gauge blocks and gauge baffles are located on the lower sides of the rails and are used to adjust the gauge. The elastic support assembly includes a rail-mounted rubber pad, which is disposed between the rail and the coupling positioning pad to provide continuous elastic support for the rail. The clamping assembly includes a spiral rail spike, a flat washer, and a type II spring clip. The spiral rail spike passes through the flat washer and the type II spring clip in sequence and is screwed into the pre-embedded sleeve of the winged sleeper, so that the type II spring clip presses against the gauge block and the gauge baffle.

[0009] Further defining the above scheme, the shoulder angle of the winged sleeper is 110°, the shoulder height is 38mm, the shoulder width is 204mm, and the width of the bottom rail support platform of the winged sleeper is 305mm.

[0010] Further defining the above scheme, the combination of the gauge block and the gauge baffle adjusts the gauge, and the gauge adjustment range for double-strand rails is -10mm to +12mm.

[0011] Further defining the above scheme, the combination of the coupling positioning pad, the height adjustment pad, and the lower height adjustment pad of the gauge baffle adjusts the rail height; the rail height adjustment range is -5 to +24 mm.

[0012] Further specifying the above scheme, the length of the wedge-shaped slope pad is 600mm, the slope ratio of the ordinary section is 1.67‰, and the slope ratio of the difficult section is 3.33‰.

[0013] Further defining the above solution, the static stiffness of the under-rail rubber pad is 60±10KN / mm, and the surface is provided with a groove structure.

[0014] Further limitations on the above scheme are as follows: the clamping force of the Type II spring bar is ≥10KN, the spring range is ≥10mm, and the anti-climbing resistance is ≥16KN / set.

[0015] For further limitation of the above solution, the slab track with winged sleepers is a precast prestressed concrete slab or a cast-in-place slab. The sleepers and the rail bearing platforms are in a "T" shape, a "cross" shape, a "herb" shape, and a "abundant" shape, with a total of 4 embodiments. Among them, a 50-mm-wide water-crossing transverse groove is provided between adjacent rail bearing platforms of the "T" shape, "cross" shape, and "herb" shape winged sleepers, and no water-crossing transverse groove is provided for the longitudinal extension support of the rail bearing platforms of the "abundant" shape winged sleepers.

[0016] Advantages of the present utility model compared with the prior art: 1. The continuous support fasteners in this solution have uniform and continuous stiffness and multi-directional adjustment functions: The rail gauge is adjusted by combining rail gauge blocks and rail gauge baffles, the rail height is adjusted by coupling the positioning cushion plate, the height adjustment cushion plate, and the height adjustment cushion plate under the rail gauge baffle, and the longitudinal drop between adjacent track slabs is adjusted by the wedge-shaped slope-adjusting cushion plate, realizing precise adjustment of the rail gauge, rail height, and longitudinal drop. The wide-range adjustment ability meets the requirements of complex lines; 2. The continuous support fasteners of this solution can ensure that the stiffness of the fastener nodes is uniform, smooth and continuous, and the vibration reduction and insulation performance are excellent; at the same time, it has good rail gauge adjustment, rail height adjustment and slope adjustment capabilities; the stiffness of the fastener nodes is 40-60 KN / mm, significantly reducing the rail corrugation; 3. This solution has vibration reduction and noise reduction effects: The rubber cushion plate under the rail evenly distributes the load, inhibits the vibration from being transmitted to the roadbed, and greatly improves the vibration reduction performance; 4. This solution is convenient for maintenance: The modular design reduces the maintenance workload and extends the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the continuous support fasteners in the present utility model; Figure 2 It is the top view of the continuous support fasteners in the present utility model; Figure 3 It is the exploded view of the continuous support fasteners in the present utility model; Figure 4 It is the schematic diagram of the slab track with winged sleepers ("cross" shape) in the present utility model; Figure 5 It is the schematic diagram of the slab track with winged sleepers ("T" shape) in the present utility model; Figure 6 It is the schematic diagram of the slab track with winged sleepers ("herb" shape) in the present utility model; Figure 7 It is the schematic diagram of the slab track with winged sleepers ("abundant" shape) in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.

[0020] It should be noted that in this article, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0021] Please refer to Figure 1-7 , and detail the embodiments of the present invention.

[0022] Embodiment: This embodiment provides a high-elastic amplitude-modulated continuous support fastener for a slab track with winged sleepers, including: A slab track 14 with winged sleepers, refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 The several different-shaped tracks shown in the figure. The slab track 14 with winged sleepers is a precast prestressed concrete slab or a cast-in-place slab, and its sleepers and rail-bearing platforms are in the shapes of "cross", "T", "herringbone", and "abundant" respectively, with a total of 4 embodiments; the slab track 14 with winged sleepers includes a roadbed and winged sleepers 12 arranged longitudinally at intervals along the roadbed. There are shoulder stops on both sides of the winged sleepers 12. The shoulder angle of the winged sleepers 12 is 110°, the shoulder height is 38 mm, the shoulder width is 204 mm, the width of the rail-bearing platform at the bottom of the winged sleepers is 305 mm, the width of the rail-bearing platform is 162 mm, and the nail hole distance is 214 mm. An embedded sleeve 11 made of nylon is provided on the rail-bearing platform of the winged sleepers 12.

[0023] Rail 13, see reference Figure 1 As shown, the rail 13 is fastened and supported on both sides of the winged sleeper 12 by continuous support fasteners; the continuous support fasteners are in-line, elastic, non-separating fasteners. A set of continuous support fasteners is laid continuously in units of 600mm width for the winged sleeper, achieving continuous and uninterrupted longitudinal laying of the rail support platform. The continuous support fasteners ensure uniform stiffness, smooth continuity, excellent vibration damping and insulation performance of the fastener joints; they also possess good adjustable spacing, height, and slope capabilities; the fastener joint stiffness is 40–60 KN / mm, and the insulation resistance is >10 Ω·cm. 8 Ω significantly reduces rail corrugation wear.

[0024] See Figure 1-3 As shown, the continuous support fastener includes a clamping assembly, an adjusting assembly, and an elastic support assembly; The adjustment component includes: The system comprises a coupling positioning pad 8, a height adjustment pad 10, and a lower height adjustment pad 5 under the gauge baffle. The coupling positioning pad 8 and the height adjustment pad 10 are positioned below the rail 13, while the lower height adjustment pad 5 is located on both sides of the height adjustment pad 10. The three components work together to adjust the rail height. The rail height adjustment range is -5 to +24 mm.

[0025] A wedge-shaped slope pad 9 is placed between the coupling positioning pad 8 and the height adjustment pad 10 to adjust the longitudinal drop between adjacent track slabs; the length of the wedge-shaped slope pad 9 is 600mm, the slope ratio of the ordinary section is 1.67‰, and the slope ratio of the difficult section is 3.33‰.

[0026] The gauge block 6 and gauge baffle 4 are located on the lower part of both sides of the rail 13 and are used to adjust the gauge in combination; the gauge adjustment range of the double rail is -10 to +12 mm.

[0027] The elastic support assembly includes a rail-mounted rubber pad 7, which is disposed between the rail 13 and the coupling positioning pad 8, providing continuous and smooth elastic support for the rail 13 to achieve vibration reduction and noise reduction. The rail-mounted rubber pad in the normal resistance section is 10mm thick with grooves, and the rail-mounted rubber pad in the low resistance section is also 10mm thick with grooves. The static stiffness of the rail-mounted rubber pad 7 is 60±10KN / mm. The rail-mounted rubber pad and the coupling positioning pad are assembled in a slotted manner to ensure that the rail-mounted rubber pad with uniform and continuous stiffness does not detach from the rail support platform under vehicle impact loads.

[0028] The clamping assembly includes a spiral spike 1, a flat washer 2, and a type II elastic clip 3. The spiral spike 1 passes sequentially through the flat washer 2 and the type II elastic clip 3, and is screwed into the pre-embedded sleeve 11 of the winged sleeper 12, so that the type II elastic clip 3 presses against the gauge block 6 and the gauge baffle 4, with sufficient clamping force and anti-creep resistance. Specifically, the clamping force of the type II elastic clip 3 is ≥10KN, the elastic stroke is ≥10mm, and the anti-creep resistance is ≥16KN / set.

[0029] A water-passing ditch is provided between adjacent rail bearing platforms on the ballastless track 14 with winged sleepers. The sleeper spacing is 600mm, the width of the water-passing ditch between sleepers is 50mm, and the bottom slope of the rail bearing platform is 1:40.

[0030] The fastener system components of this utility model have clear functions and high reliability, are easy to install, significantly reduce the overall maintenance workload, effectively reduce the transmission of track vibration to sleepers and track bed, greatly improve the unevenness of track structure and the unevenness of support stiffness, suppress rail wave wear, extend service life, and reduce installation and maintenance costs. It is suitable for high-speed railway and urban rail transit systems and has significant economic and social benefits.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-elasticity, amplitude-adjustable continuous support fastener for ballastless track with winged sleepers, characterized in that: Comprising: Slab track with winged sleeper (14), the slab track with winged sleeper (14) includes a ballast bed and winged sleepers (12) arranged longitudinally at intervals along the ballast bed. Shoulder blocks are provided on both sides of the winged sleeper (12), and embedded sleeves (11) are provided on the rail bearing platform of the winged sleeper (12); Rail (13), both sides of the rail (13) are buckled and supported on the winged sleeper (12) through continuous support fasteners; [[ID=ģ]]Continuous support fasteners, including a buckling component, an adjustment component and an elastic support component; The adjustment component includes: Coupled positioning pad (8), height adjustment pad (10) and height adjustment pad under the gauge block (5). Among them, the coupled positioning pad (8) and the height adjustment pad (10) are padded under the rail (13), and the height adjustment pad under the gauge block (5) is arranged on both sides of the height adjustment pad (10). The three are combined to adjust the rail height; Wedge-shaped slope adjustment pad (9), arranged between the coupled positioning pad (8) and the height adjustment pad (10), used to adjust the longitudinal drop between adjacent track slabs; Gauge blocks (6) and gauge brackets (4), arranged at the lower parts on both sides of the rail (13), used to adjust the gauge; The elastic support component includes an under-rail rubber pad (7), and the under-rail rubber pad (7) is arranged between the rail (13) and the coupled positioning pad (8) to provide continuous elastic support for the rail (13); The buckling component includes a screw spike (1), a flat washer (2) and a Type-II elastic clip (3). The screw spike (1) passes through the flat washer (2) and the Type-II elastic clip (3) in sequence and is screwed into the embedded sleeve (11) of the winged sleeper (12) to make the Type-II elastic clip (3) press tightly against the gauge block (6) and the gauge bracket (4).

2. The high-elasticity, amplitude-adjustable continuous support fastener for ballastless track with winged sleepers according to claim 1, characterized in that: The shoulder angle of the winged sleeper (12) is 110°, the shoulder height is 38 mm, the shoulder width is 204 mm, and the width of the rail bearing platform at the bottom of the winged sleeper is 305 mm.

3. The high-elasticity, amplitude-adjustable continuous support fastener for ballastless track with winged sleepers according to claim 1, characterized in that: The coupled positioning pad (8), the height adjustment pad (10) and the height adjustment pad under the gauge block (5) are combined to adjust the rail height; the rail height adjustment range is -5 to +24 mm.

4. The high-elasticity, amplitude-adjustable continuous support fastener for ballastless track with winged sleepers according to claim 1, characterized in that: The length of the wedge-shaped slope adjustment pad (9) is 600 mm, the slope rate in the normal section is 1.6‰o, and the slope rate in the difficult section is 3.3‰o.

5. A high-elasticity, amplitude-adjustable continuous support fastener for ballastless track with winged sleepers according to claim 1, characterized in that: The static stiffness of the under-rail rubber pad (7) is 60±10 KN / mm, and a groove structure is provided on the surface.

6. The high-elasticity, amplitude-adjustable continuous support fastener for ballastless track with winged sleepers according to claim 1, characterized in that: The buckling force of the Type-II elastic clip (3) ≥10 KN, the elastic stroke ≥10 mm, and the anti-climbing resistance ≥16 KN / group.

7. A high-elasticity, amplitude-adjustable continuous support fastener for ballastless track with winged sleepers according to claim 1, characterized in that: The slab track with winged sleeper (14) is a precast prestressed concrete slab or a cast-in-place slab. The shape of the sleeper and the rail bearing platform is in the shape of "T", "cross", "艹", "abundant", a total of 4 types. Among them, a 50-mm-wide water-crossing transverse groove is provided between adjacent rail bearing platforms of the "T", "cross", and "艹" shaped winged sleepers, and no water-crossing transverse groove is provided for the longitudinal extension support of the rail bearing platform of the "abundant" shaped winged sleeper.

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