Special height-adjusting track fastener for polyurethane curing ballast bed

Abstract

The invention discloses a special heightening rail fastener for a polyurethane curing ballast bed, which comprises a buffer base plate, iron heightening shoulders, a gauge apron lower heightening base plate, an under-rail fine tuning base plate and an under-rail base plate which are sequentially arranged from bottom to top, the pair of iron heightening shoulders are symmetrically arranged, the iron shoulders are arranged on the iron heightening shoulders, the gauge apron is sleeved on the iron shoulders, and the gauge apron lower heightening base plate and the under-rail fine tuning base plate are arranged on the under-rail fine tuning base plate. A gauge block is arranged on the inner side of the gauge apron, the inner side of the gauge block is buckled and pressed on the shoulder face of the lower end of a steel rail, an elastic strip is arranged on the gauge apron, and a screw spike sequentially penetrates through a flat washer, the elastic strip, the gauge apron, a gauge apron height adjusting base plate, an iron height adjusting shoulder and a buffering base plate from top to bottom and then is connected into an embedded sleeve on a sleeper in a screwed mode. And sleeper shoulders for supporting the end parts of the buffer base plates are arranged at the two ends of the sleeper. According to the special heightening rail fastener for the polyurethane curing ballast bed, when the heightening amount is large, the transverse force of a steel rail can be transmitted to a sleeper retaining shoulder, the fastener heightening base plate is protected, and the fastener heightening base plate is not prone to being damaged.

Description

Technical Field

[0001] This invention relates to the field of railway engineering technology, specifically to a special height-adjusting track fastener for polyurethane-cured track beds. Background Technology

[0002] Conventional ballast railway fasteners theoretically do not require extensive height adjustments because the sleeper height can be redefined by tamping the ballast under the sleepers.

[0003] Polyurethane-cured track bed is a new type of track structure that combines the advantages of both ballasted and ballastless tracks. It involves pouring polyurethane material into a stabilized ballast bed, allowing it to foam, expand, and solidify between the ballast stones. This process fills the gaps between the ballast stones with the foamed polyurethane elastic material, firmly bonding the ballast stones together to form a flexible, integral track bed structure. This technology is suitable for high-speed railways, conventional railways, heavy-haul railways, and railways operating in desert or sandstorm conditions.

[0004] Polyurethane-cured track beds have the following technical characteristics: 1. Reduce residual deformation of the track bed and the amount of maintenance and repair work.

[0005] 2. Improve the longitudinal and lateral resistance of ballast track; 3. Reduce vibration and noise; 4. It has good stability and integrity.

[0006] Because of the integrity of the track bed, tamping operations cannot be performed. When special height adjustment operations are required using fasteners, the fasteners do not have the ability to adjust the height.

[0007] Commonly, there are ballast fastener structures such as... Figure 11 Adjustment can be made by Figure 12 The method. Figure 11 F1 in the figure represents the direction of lateral force transmission of the fastener under normal conditions. Figure 12 F2 in the figure represents the direction of lateral force transmission after the fastener is adjusted to a higher position. Figure 12 It can be seen that when the lateral force is adjusted by a large amount, it cannot be transmitted to the sleeper shoulder and is prone to damage to the fastener adjustment pad. Summary of the Invention

[0008] The purpose of this invention is to provide a special height-adjusting track fastener for polyurethane-cured track beds. When the height adjustment is large, this special height-adjusting track fastener can transfer the lateral force of the rail to the sleeper shoulder, protecting the fastener's height adjustment pad and making it less susceptible to damage.

[0009] To achieve the above objectives, the present invention provides a special height-adjusting track fastener for polyurethane-cured track beds, comprising, from bottom to top, a buffer pad, a steel height-adjusting shoulder, a gauge baffle lower height-adjusting pad, a rail under-mount micro-adjustment pad, and a rail under-mount pad. A pair of steel height-adjusting shoulders are symmetrically arranged, each steel height-adjusting shoulder is provided with a steel shoulder, and a gauge baffle is fitted on the steel shoulder. A gauge block is provided on the inner side of the gauge baffle, and the inner side of the gauge block is pressed against the lower shoulder surface of the rail. A spring strip is provided on the gauge baffle. A spiral track spike passes from top to bottom through a flat washer, the spring strip, the gauge baffle, the gauge baffle lower height-adjusting pad, the steel height-adjusting shoulder, and the buffer pad, and is then screwed into a pre-embedded sleeve on the sleeper. Sleeper shoulders supporting the ends of the buffer pad are provided at both ends of the sleeper.

[0010] Preferably, the outer end of the gauge baffle is provided with an outer support, the two ends of the outer support are provided with side arms facing the rail, the ends of the two side arms extend towards each other and are provided with inner supports, a gap is formed between the two inner supports, and the outer support, side arms and inner supports enclose to form a limiting hole for the iron shoulder to pass through.

[0011] Preferably, the bottom of both ends of the gauge baffle is provided with bottom grooves that communicate with the limiting holes.

[0012] Preferably, the upper surface of the outer support is recessed downward to form a recess that can limit the elastic bar, and the height of the recess on the side away from the rail is greater than the height on the side closer to the rail.

[0013] Preferably, the inner support is vertically arranged, and the distance between the outer support and the inner support gradually increases from top to bottom, forming an angle of α.

[0014] Preferably, the inner side of the iron shoulder is a vertical surface that fits into the inner support, and the outer side of the iron shoulder is a wedge-shaped surface.

[0015] Preferably, the gauge block has protrusions located within the gap on the side facing away from the rail.

[0016] Preferably, the gauge baffle lower adjustment pad has two rectangular holes symmetrically arranged for the iron shoulder to pass through.

[0017] Preferably, the front and rear ends of the track pad are provided with limit stops.

[0018] Preferably, the buffer pad is a symmetrically arranged two-half structure, with a first inclined surface at one end that contacts the sleeper shoulder, and a second inclined surface at the end of the rail height adjustment shoulder that contacts the first inclined surface. The buffer pad is provided with a first mounting hole for the spiral spike to pass through, and the rail height adjustment shoulder is provided with a second mounting hole that penetrates the rail shoulder.

[0019] According to the above technical solution, the special height-adjusting track fastener for polyurethane-cured track bed can transfer the lateral force of the rail to the sleeper shoulder when the height adjustment is large, protecting the height adjustment pad of the fastener and making it less susceptible to damage.

[0020] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the fastener of the present invention; Figure 2 This is a top view of a preferred embodiment of the fastener of the present invention; Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure; Figure 4 This is a schematic diagram of the overall structure of a preferred embodiment of the track gauge baffle; Figure 5 This is a side view of a preferred embodiment of the track gauge baffle. Figure 6 This is a schematic diagram of the overall structure of a preferred embodiment of the gauge baffle lowering pad; Figure 7 This is a schematic diagram of the overall structure of a preferred embodiment of the gauge block; Figure 8 This is a schematic diagram of the overall structure of a preferred embodiment of the rail pad; Figure 9 This is a partial structural diagram of a preferred embodiment of the buffer pad; Figure 10 This is a schematic diagram of the overall structure of a preferred embodiment of the iron-adjustable shoulder; Figure 11 This is a schematic diagram of lateral force transmission under normal conditions for ballast fasteners; Figure 12 This is a schematic diagram of lateral force transmission under the typical raised state of ballast fasteners; Figure 13 This is a schematic diagram of the lateral force transmission of the fastener of the present invention.

[0022] Explanation of reference numerals in the attached figures 1-Sleeper; 2-Buffer pad; 3-Iron height adjustment shoulder; 4-Height adjustment pad under gauge baffle; 5-Under-rail fine-tuning pad; 6-Under-rail pad; 7-Gauge baffle; 8-Elastic strip; 9-Flat washer; 10-Spiral spike; 11-Gauge block; 12-Rail; 13-Iron shoulder; 14-Embedded sleeve; 15-Outer support; 16-Recess; 17-Side arm; 18-Inner support; 19-Bottom groove; 20-Rectangular hole; 21-Protrusion; 22-Limiting strip; 23-First inclined surface; 24-Mounting hole; 25-Second inclined surface; 26-Sleeper shoulder; 27-Second mounting hole; 28-Vertical surface; 29-Wedge surface. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] In this invention, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside" in the terminology only represent the orientation of the term in its normal use or are common terms understood by those skilled in the art, and should not be regarded as a limitation on the term.

[0025] See Figure 1-10 The special height-adjustable track fastener for polyurethane-cured track bed shown includes, from bottom to top, a buffer pad 2, a steel height-adjustable shoulder 3, a gauge baffle lower height-adjustable pad 4, a rail under-adjustable pad 5, and a rail under-adjustable pad 6. A pair of steel height-adjustable shoulders 3 are symmetrically arranged. A steel shoulder 13 is provided on the steel height-adjustable shoulder 3. A gauge baffle 7 is fitted on the steel shoulder 13. A gauge block 11 is provided on the inner side of the gauge baffle 7. The inner side of the gauge block 11 is pressed against the lower shoulder surface of the rail 12. A spring strip 8 is provided on the gauge baffle 7. A spiral spike 10 passes through the flat washer 9, spring strip 8, gauge baffle 7, gauge baffle lower height-adjustable pad 4, steel height-adjustable shoulder 3, and buffer pad 2 from top to bottom and is screwed into the pre-embedded sleeve 14 on the sleeper 1. Sleeper shoulders 26 supporting the ends of the buffer pad 2 are provided at both ends of the sleeper 1.

[0026] Through the implementation of the above technical solution, see Figure 13 The lateral force transmitted by the rail 12 is transmitted to the gauge baffle 7 through the gauge block 11, and then to the iron shoulder 13 through the gauge baffle 7. Finally, it is transmitted to the iron height adjustment shoulder 3 through the iron shoulder 13. Since the iron height adjustment shoulder 3 is located in the rail bearing groove between the two sleeper shoulders 26, the lateral force is finally transmitted to the sleeper shoulder 26 through the end of the buffer pad 2.

[0027] This fastener structure is compared to Figure 12In general, the lateral force transmission method of the ballast fastener in the height adjustment state does not require the additional iron height adjustment shoulder 3 with an upward shoulder structure at the end to counteract the lateral force. Therefore, it can effectively protect the fastener height adjustment pad and make it less susceptible to damage.

[0028] In this embodiment, to further provide a gauge baffle 7, an outer support 15 is provided at the outer end of the gauge baffle 7. Side arms 17 are provided at both ends of the outer support 15 facing the rail 12. Inner supports 18 extend from the ends of the two side arms 17 in a direction facing each other, and a gap is formed between the two inner supports 18. The outer support 15, side arms 17, and inner supports 18 together form a limiting hole through which the iron shoulder 13 passes. With this arrangement, the iron shoulder 13 is inserted into the limiting hole, and the side of the iron shoulder 13 closest to the rail 12 abuts against the inner support 18, transmitting lateral force. The outer support 15 and inner support 18 provide support.

[0029] In this embodiment, the bottom of both ends of the gauge baffle 7 is provided with bottom grooves 19 that communicate with the limiting holes. This arrangement reduces the contact area between the gauge baffle 7 and the upper surface of the gauge baffle lowering pad 4, preventing excessive adhesion between the two and affecting the lateral sliding and disassembly of the gauge baffle 7.

[0030] In this embodiment, the upper surface of the outer support 15 is recessed downward to form a recess 16 that can limit the elastic bar 8. The height of the recess 16 on the side away from the rail 12 is greater than the height on the side closer to the rail 12. The outer part of the recess 16 is an arc that can accommodate the end of the elastic bar 8, and the inner part is a plane with a certain slope that is tangent to the arc, thereby facilitating the clamping of the elastic bar 8.

[0031] In this embodiment, the inner support 18 is vertically arranged, and the distance between the outer support 15 and the inner support 18 gradually increases from top to bottom, forming an angle of α. This angle allows the gauge baffle 7 to provide stable counter-support when subjected to lateral forces, resulting in a more stable structure.

[0032] In this embodiment, the inner surface of the iron shoulder 13 is a vertical surface 28 that fits against the inner support 18, and the outer surface of the iron shoulder 13 is a wedge-shaped surface 29. The vertical surface 28 allows for closer contact between the inner surface of the iron shoulder 13 and the inner support 18, increasing the transmission effect of lateral forces. The wedge-shaped surface 29 increases the compressive strength of the iron shoulder 13.

[0033] In this embodiment, a protrusion 21 is provided on the side of the gauge block 11 facing away from the rail 12, which is limited to the gap. The protrusion 21 is provided to maintain the longitudinal position of the gauge block 11 along the rail 12.

[0034] In this embodiment, to facilitate the passage of the steel shoulder 13 through the gauge baffle lower adjustment pad 4, two rectangular holes 20 are symmetrically provided on the gauge baffle lower adjustment pad 4 for the steel shoulder 13 to pass through. The width of the rectangular holes 20 along the rail direction can be set to be the same as the width of the steel shoulder 13.

[0035] In this embodiment, limit bars 22 are provided at the front and rear ends of the rail pad 6. The limit bars 22 ensure that the longitudinal position of the rail pad 6 along the rail 12 is maintained, thus preventing the rail pad 6 from slipping off the bottom of the rail 12 during train operation.

[0036] In this embodiment, the buffer pad 2 is a symmetrically arranged two-half structure, with a first inclined surface 23 at one end contacting the sleeper shoulder 26, and a second inclined surface 25 at the end of the rail height adjustment shoulder 3 contacting the first inclined surface 23. The buffer pad 2 has a first mounting hole 24 for the spiral spike 10 to pass through, and the rail height adjustment shoulder 3 has a second mounting hole 27 penetrating the rail shoulder 13. Lateral force is transmitted through the second inclined surface 25 at the end of the rail height adjustment shoulder 3 to the first inclined surface 23 at the end of the buffer pad 2, and then to the sleeper shoulder 26. The first mounting hole 24 and the second mounting hole 27 are used to cooperate in passing through the spiral spike 10.

[0037] The fastener of this invention can provide a greater height adjustment range while ensuring its normal use. (Compared to...) Figure 11 and Figure 12 Compared to the original fasteners, which could only be adjusted up to 30mm, this new fastener allows for an adjustment of 30mm to 60mm. With the addition of a steel height adjustment shoulder, the height adjustment is 30mm. Additionally, the height adjustment shim 4 under the gauge baffle can be adjusted up to 20mm, and the fine-tuning shim 5 under the rail can be adjusted up to 10mm. This, to a certain extent, meets the height adjustment requirements of polyurethane-cured track beds.

[0038] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0039] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0040] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A special height-adjustable track fastener for polyurethane-cured track beds, characterized in that, The system includes, from bottom to top, a buffer pad (2), a steel height adjustment shoulder (3), a gauge baffle lower height adjustment pad (4), a rail under-rail fine adjustment pad (5), and a rail under-rail pad (6). A pair of steel height adjustment shoulders (3) are symmetrically arranged. A steel shoulder (13) is provided on the steel height adjustment shoulder (3). A gauge baffle (7) is fitted on the steel shoulder (13). A gauge block (11) is provided on the inner side of the gauge baffle (7). The inner side of the gauge block (11) is pressed. On the lower shoulder of the rail (12), the gauge baffle (7) is provided with a spring strip (8). The spiral spike (10) passes through the flat washer (9), the spring strip (8), the gauge baffle (7), the gauge baffle lower height adjustment pad (4), the iron height adjustment shoulder (3) and the buffer pad (2) from top to bottom and is then screwed into the pre-embedded sleeve (14) on the sleeper (1). The sleeper (1) is provided with sleeper shoulders (26) at both ends to support the ends of the buffer pad (2).

2. The special height-adjustable track fastener for polyurethane-cured track bed according to claim 1, characterized in that, The outer end of the gauge baffle (7) is provided with an outer support (15). The two ends of the outer support (15) are provided with side arms (17) facing the rail (12). The ends of the two side arms (17) extend towards each other and are provided with inner supports (18). A gap is formed between the two inner supports (18). The outer support (15), side arms (17) and inner supports (18) surround and form a limiting hole for the iron shoulder (13) to pass through.

3. The special height-adjustable track fastener for polyurethane-cured track bed according to claim 2, characterized in that, The bottom of both ends of the gauge baffle (7) is provided with bottom grooves (19) that connect to the limiting holes.

4. The special height-adjustable track fastener for polyurethane-cured track bed according to claim 2, characterized in that, The upper surface of the outer support (15) is recessed downward to form a recess (16) that can limit the elastic bar (8), and the height of the recess (16) on the side away from the rail (12) is greater than the height on the side closer to the rail (12).

5. The special height-adjustable track fastener for polyurethane-cured track bed according to claim 2, characterized in that, The inner support (18) is vertically arranged, and the distance between the outer support (15) and the inner support (18) gradually increases from top to bottom, forming an angle of α.

6. The special height-adjustable track fastener for polyurethane-cured track bed according to claim 2, characterized in that, The inner side of the iron shoulder (13) is the vertical surface (28) that fits into the inner support (18), and the outer side of the iron shoulder (13) is a wedge surface (29).

7. The special height-adjustable track fastener for polyurethane-cured track bed according to claim 2, characterized in that, The gauge block (11) has a protrusion (21) located in the gap on the side facing away from the rail (12).

8. The special height-adjustable track fastener for polyurethane-cured track bed according to claim 1, characterized in that, The gauge baffle lower adjustment pad (4) is symmetrically provided with two rectangular holes (20) for passing through the iron shoulder (13).

9. The special height-adjustable track fastener for polyurethane-cured track bed according to claim 1, characterized in that, Limiting bars (22) are provided at the front and rear ends of the rail pad (6).

10. The special height-adjustable track fastener for polyurethane-cured track bed according to claim 1, characterized in that, The buffer pad (2) is a symmetrically arranged two-half structure, with a first inclined surface (23) at its end that contacts the sleeper shoulder (26), and a second inclined surface (25) at the end of the iron height adjustment shoulder (3) that contacts the first inclined surface (23). The buffer pad (2) is provided with a first mounting hole (24) for passing through the spiral rail spike (10), and the iron height adjustment shoulder (3) is provided with a second mounting hole (27) for passing through the iron shoulder (13).

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