Anchorage bolt type fastener track pad for small radius curves

Abstract

The utility model discloses a kind of anchoring bolt type fastener rail pad for small radius curve, rail pad is located in the lower side of steel rail, the upper side and the lower side of rail pad are divided into multiple rectangular areas arranged in array, rectangular area is divided into large rectangular area and small rectangular area, large rectangular area and small rectangular area in same row and / or same column are alternately arranged;Wherein large rectangular area is rectangular groove, and small rectangular area is rectangular projection.The utility model in the rail pad has excellent resilience, wear resistance and corrosion resistance, by absorbing impact energy, wheel-rail dynamic load can be dispersed to ballast layer, reduce contact stress peak, significantly reduce rail corrugation and sleeper crack, which can reduce fatigue damage of track structure, reduce the risk of track deformation and fracture, to enhance the safety of railway operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of railway fasteners for small radius curves, specifically relating to a rail pad for an anchor bolt type fastener for small radius curves. Background Technology

[0002] In the field of rail transit, whether it is high-speed railway, conventional railway, heavy-haul freight railway or urban rail transit, the design, construction and operation of curved tracks are more complex than those of straight tracks in terms of structural strength, material selection, line construction and operation and maintenance. In particular, railway lines with a curve radius of less than 600m have higher requirements for infrastructure and structural components.

[0003] Due to the large lateral forces on small-radius curves, rail overturning is significant, resulting in severe damage to rails, sleepers, and fasteners on site. This is particularly pronounced in recent years with the substantial increase in freight volume and train axle loads, exacerbating the damage to sleepers and fasteners and highlighting the problems associated with small-radius curves. While various railway bureaus in China have developed different sleepers and fasteners to address these issues, these solutions suffer from poor versatility, easy damage to rail rests, difficulties in on-site installation, and high costs.

[0004] Therefore, there is an urgent need to develop a new type of small-radius curve fastener that is simple in structure and easy to install, disassemble, and replace, in order to solve the above problems. In small-radius curve fasteners, the rail pad is a key component, providing crucial technical support for improving railway transport capacity and ensuring the safe and stable operation of railways. Utility Model Content

[0005] The purpose of this utility model is to provide a rail pad for anchor bolt fasteners for small radius curves.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] An anchor bolt type fastener rail pad for small radius curves, the rail pad is located on the underside of the rail, the upper and lower sides of the rail pad are divided into multiple rectangular areas arranged in an array, the rectangular areas are divided into large rectangular areas and small rectangular areas, the large rectangular areas and / or the small rectangular areas are arranged alternately in the same row and / or the same column; wherein the large rectangular area is a rectangular groove, and the small rectangular area is a rectangular protrusion.

[0008] Furthermore, the large rectangular area on the upper side of the track pad corresponds to the small rectangular area on the lower side, and the small rectangular area on the upper side corresponds to the large rectangular area on the lower side.

[0009] Furthermore, the left and right sides of the rail pad are symmetrically provided with rectangular slots, which engage with the gauge baffle.

[0010] Furthermore, the material of the track pad is thermoplastic polyester elastomer.

[0011] The beneficial effects of this utility model are:

[0012] This utility model's under-rail pad has excellent resilience, wear resistance, and corrosion resistance. By absorbing impact energy, it can disperse the dynamic load of the wheel and rail to the ballast layer, reduce the peak contact stress, and significantly reduce rail corrugation and sleeper cracks. It can reduce fatigue damage to the track structure, reduce the risk of track deformation and fracture, and thus enhance the safety of railway operation.

[0013] The track pad uses a combination of large rectangular grooves and small rectangular protrusions, which can improve the longitudinal resistance of the track and prevent longitudinal displacement of the track.

[0014] Because the lower pad has a long service life, it reduces the need for frequent maintenance and replacement, thus lowering operating costs compared to ordinary pads that need to be replaced every year. Attached Figure Description

[0015] Figure 1 This is an assembly drawing of the present invention in a fastener;

[0016] Figure 2 yes Figure 1 Schematic diagram of the A-A cross section;

[0017] Figure 3 This is a perspective view of the lower pad of the middle rail of this utility model;

[0018] Figure 4 This is a top view of the lower pad of the middle rail of this utility model;

[0019] Figure 5 yes Figure 4 Schematic diagram of the C-C cross section.

[0020] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] like Figures 1 to 5 As shown, this embodiment discloses a rail pad for anchor bolt type fasteners for small radius curves, which is used in anchor bolt type fasteners for small radius curves.

[0023] With the extension direction of rail 8 as the front-to-back direction, the left and right sides of the rail bearing surface are shoulders. The anchor bolt type fastener for small radius curves includes a gauge baffle 1, an anchor bolt type rail spike 2, a spring strip 3, an insulated gauge block 4, and a rail pad 5.

[0024] Two rail spike holes are symmetrically arranged on the front and back of the gauge baffle 1. The anchor bolt type rail spike 2 passes through the rail spike hole and cooperates with the pre-embedded sleeve 6 to fix the gauge baffle to the rail bearing surface. The gauge baffle 1 is provided with a spring clip position near the shoulder, and the spring clip position abuts and cooperates with the shoulder. The spring clip 3 is installed on the gauge baffle 1 by T-bolt 7. The head of the spring clip 3 is pressed against the rail by the insulated gauge block 4, and the tail of the spring clip 3 is placed at the spring clip position.

[0025] The rail pad 5 is located on the underside of the rail. Rectangular slots 51 are symmetrically provided on the left and right sides of the rail pad 5. The rectangular slots 51 are engaged with the gauge baffle 1. The upper and lower sides of the rail pad 5 are divided into multiple rectangular areas arranged in an array. The rectangular areas are divided into large rectangular areas 52 and small rectangular areas 53. The large rectangular areas and small rectangular areas are arranged alternately in the same row and / or the same column. The large rectangular area 52 is a rectangular groove, and the small rectangular area 53 is a rectangular protrusion.

[0026] In this embodiment, the large rectangular area on the upper side of the rail pad corresponds to the small rectangular area on the lower side, and the small rectangular area on the upper side corresponds to the large rectangular area on the lower side.

[0027] The rail pads, through the above design, have excellent resilience. By absorbing impact energy with high resilience materials (optimized elastic modulus), they can disperse the dynamic load of wheel and rail to the ballast layer, reduce the peak contact stress by about 30%, significantly reduce rail corrugation and sleeper cracks, and extend service life.

[0028] The rail pads are made of thermoplastic polyester elastomer, exhibiting excellent wear resistance. Their structural strength is 2-6 times that of vulcanized rubber, and their tensile strength and tear strength are 2-6 times and 2-10 times that of natural rubber, respectively. This ensures stable performance over long-term use, with excellent oil and solvent resistance and wide-temperature range stability, reducing performance degradation in extreme environments and further extending service life. The rail pads also possess excellent corrosion resistance, outstanding oil resistance, swelling resistance, and penetration resistance, making them suitable for various oil environments, including fuel oil, hot oil, and hydraulic oil.

[0029] The track pad uses a combination of large rectangular grooves and small rectangular protrusions, which can improve the longitudinal resistance of the track and prevent longitudinal displacement of the track.

[0030] The application of rail pads can reduce fatigue damage to the track structure, lower the risk of track deformation and fracture, and thus enhance the safety of railway operation. Due to the long service life of rail pads, frequent maintenance and replacement work is reduced, resulting in a reduction of operation and maintenance costs (including labor and downtime losses) of more than 40% compared to replacing ordinary pads annually.

[0031] Existing rail pads tend to stick to the rails after a period of use, causing inconvenience for maintenance. However, the rail pads of this invention are less prone to sticking to the rails, greatly improving maintenance efficiency.

[0032] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

[0033] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A rail underplate for anchor bolt type fasteners used on small radius curves, wherein the rail underplate is located on the underside of the rail, characterized in that: The upper and lower sides of the track pad are divided into multiple rectangular areas arranged in an array. The rectangular areas are further divided into large rectangular areas and small rectangular areas. The large rectangular areas and small rectangular areas are arranged alternately in the same row and / or the same column. The large rectangular areas are rectangular grooves, and the small rectangular areas are rectangular protrusions.

2. The rail pad for anchor bolt type fasteners for small radius curves according to claim 1, characterized in that: The large rectangular area on the upper side of the track pad corresponds to the small rectangular area on the lower side, and the small rectangular area on the upper side corresponds to the large rectangular area on the lower side.

3. The rail pad for anchor bolt type fasteners for small radius curves according to claim 2, characterized in that: The track pad is provided with rectangular slots on both the left and right sides, which engage with the track gauge baffle.

4. The anchor bolt type fastener rail pad for small radius curves according to claim 2 or 3, characterized in that: The material of the track pad is thermoplastic polyester elastomer.

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