Iron base plate with wide steel rail position adjusting range

Abstract

The utility model relates to an iron backing plate with a wide steel rail position adjusting range, which comprises an iron backing plate body, the iron backing plate body is of a rectangular plane structure, the length range is 283-285 mm, two U-shaped holes are symmetrically arranged along the length direction, the closed ends are semicircular, the distance between the circle centers of the closed ends of the U-shaped holes is 216-219 mm, and the inner sides of the holes are provided with raised retaining shoulders of trapezoidal table structures. The distance between the inner sides of the retaining shoulders ranges from 170 mm to 172 mm, and grooves matched with the U-shaped holes are formed in the retaining shoulders. By shortening the length of the iron base plate body and optimizing the layout of the U-shaped holes, on the premise of being compatible with the size of an existing sleeper connector, the first-level adjustment amount is increased to + / -7mm, the second-level adjustment amount reaches + / -3mm, the total adjustment range is expanded to + / -10mm, the requirement of a geological complex section is remarkably met, the U-shaped holes are adopted for replacing a traditional long round hole structure, the casting defect risk of a thin-wall area is eliminated, and the service life of the sleeper is prolonged. The crack resistance and the service life of the iron backing plate are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of railway track fastening systems, specifically to an iron pad structure for adjusting the left and right positions of ballastless track rails, which is particularly suitable for scenarios in high-speed railway lines where the position of rails needs to be adjusted over a wide range. Background Technology

[0002] In railway track maintenance, adjusting the lateral position of the rails is a core step in controlling track gauge, direction, and curve parameters, directly affecting the safety and stability of train operation. Currently, ballastless tracks are commonly used in high-speed railways. Figure 1 The WJ-8 type fastener system shown in Figure 2 has a specific structure of its iron pad plate. The left and right positions of the rail are adjusted through two levels of adjustment. The first level of adjustment is achieved by replacing the insulated gauge block and using the limiting effect of the raised shoulder to achieve an adjustment of ±2mm. The second level of adjustment is achieved by replacing the gauge baffle and using the lateral movement space of the elongated hole in the iron pad plate to achieve an adjustment of ±3mm. The total adjustment is ±5mm.

[0003] However, although existing track pads can achieve a total adjustment of ±5mm by replacing insulated gauge blocks and gauge baffles, the complex geological conditions in my country (such as soft soil foundations and subsidence in mining areas) and the differences in track construction quality have significantly increased the demand for lateral rail adjustment in some high-speed rail sections (especially in areas with large foundation deformation). The existing fastening system's adjustment capacity of only ±5mm is insufficient to meet the maintenance requirements of special sections, leading to an increased risk of gauge exceeding limits, a higher frequency of maintenance operations, and consequently affecting the efficiency of line operation and increasing maintenance costs. In addition, the existing track pads with elongated hole structures are prone to forming thin-walled areas on both sides, which are prone to quality problems such as cracks and deformation during casting or long-term use. The rail pads around the upper limit boss of the track pads are prone to aging and cracking under long-term pressure, affecting service life and increasing maintenance costs.

[0004] Therefore, how to significantly increase the lateral adjustment range of the rail while reducing weight and cost by optimizing the design of the iron pad structure, while keeping the existing sleeper / track slab interface dimensions unchanged, has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model proposes an iron pad with a wide rail position adjustment range. It can achieve the requirement of ±10mm left and right rail position adjustment while keeping the existing sleeper / track slab interface size unchanged. It can avoid the thin-walled structure on both sides of the iron pad and prevent the rubber pad around the boss from aging and cracking.

[0006] To achieve the above objectives, the technical solution adopted by this utility model includes:

[0007] A steel pad with a wide rail position adjustment range is installed in the rail bearing groove, comprising a steel pad body, wherein the steel pad body has a rectangular structure, characterized in that...

[0008] Two symmetrical U-shaped holes are provided along the length of the iron pad body. The closed end of the U-shaped hole is semi-circular and each hole is provided with a raised shoulder. The raised shoulder is provided with a groove at the position corresponding to the U-shaped hole, and the shape of the groove matches the U-shaped hole.

[0009] Furthermore, the iron pad body has a rectangular planar structure, and the portion of the iron pad body located between the protruding shoulders is used to place the rail pad.

[0010] Furthermore, the length of the iron pad body ranges from 283 to 285 mm, and the distance between the centers of the closed ends of the U-shaped holes is from 216 to 219 mm.

[0011] Furthermore, the distance between the inner sides of the symmetrically arranged protruding shoulders is 170–172 mm.

[0012] Optionally, the raised shoulder is a trapezoidal platform structure, and the upper end of the raised shoulder has two symmetrical protrusions in the extension direction.

[0013] Optionally, the iron pad is made of QT450-10 material.

[0014] The beneficial effects of this utility model are as follows:

[0015] This utility model, through structural optimization and innovative design, achieves significant improvements in the lateral adjustment performance, structural reliability, and economy of the rail while maintaining compatibility with existing sleeper / track slab interface dimensions. By shortening the length of the iron pad and the center-to-center distance of the closed ends of the U-shaped hole, combined with structural improvements such as expanding the distance between the raised shoulders, the lateral adjustment range of the rail is doubled from ±5mm to ±10mm. This effectively solves the risk of exceeding the gauge limit in geologically complex sections and lines with large construction errors, and significantly reduces the frequency of maintenance operations. Simultaneously, the design of the upper limit boss on the existing iron pad is eliminated, avoiding the problem of aging and cracking of the rail pad, and reducing the overall weight of the iron pad by nearly 20%, significantly reducing material consumption and manufacturing costs. Furthermore, the use of a U-shaped hole instead of the traditional elongated hole structure eliminates the risk of casting defects in thin-walled areas, improving the crack resistance and service life of the iron pad. Its optimized design further enhances the stability of the fastener's lateral adjustment, providing a reliable guarantee for the long-term safe operation of high-speed railways. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the WJ-8 type fastener system in the prior art;

[0017] Figure 2aThis is a front view of a steel pad in the prior art;

[0018] Figure 2b This is a top view of an iron pad in the prior art;

[0019] Figure 2c This is a left view of an iron pad in the prior art;

[0020] Figure 3 This is a three-dimensional schematic diagram of an iron pad with a wide rail position adjustment range according to this application;

[0021] Figure 4a This is a front view of a steel pad with a wide rail position adjustment range according to this application;

[0022] Figure 4b This is a top view of a steel pad with a wide rail position adjustment range according to this application;

[0023] Figure 4c This is a left view of a steel pad with a wide rail position adjustment range according to this application;

[0024] Explanation of the attached drawing numbers:

[0025] 1-Iron pad body, 2-Limiting boss, 3-Oblong hole, 4-Protruding shoulder, 5-U-shaped hole, 6-Boss. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting the present invention.

[0027] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. The terms “first,” “second,” etc., are merely for clarification of the subject matter and do not limit the subject matter itself. Of course, the subjects defined by “first” and “second” may be the same terminal, device, and user, or the same type of terminal, device, and user. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The term “and / or” as used herein includes all or any unit and all combinations of one or more associated listed items.

[0028] Furthermore, it should be understood that in the embodiments of this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0030] like Figure 1 The diagram shows a WJ-8 type fastener system in the prior art. From top to bottom, it consists of a rail, an insulated gauge block, a rail pad, an iron pad, a gauge baffle, an elastic pad under the iron pad, and a pre-embedded sleeve. On both sides of the rail, from top to bottom, spiral spikes, flat washers, and elastic strips are installed. The rail is fixed by the cooperation of the spiral spikes and elastic strips.

[0031] like Figures 2a-2c The figures show the front view, top view, and left view of the existing iron pad plate. In the existing technology, the iron pad plate body 1 has four limiting bosses 2 around its perimeter (distributed around the rail bearing surface), and symmetrical elongated holes 3 (the length of the holes is perpendicular to the rail direction) are opened on both sides of the iron pad plate body 1. Raised shoulders 4 are provided inside the elongated holes 3. When it is necessary to adjust the left and right position of the rail, it is necessary to replace the insulating gauge blocks (which cooperate with the raised shoulders 4 to achieve ±2mm adjustment) and gauge baffles (which cooperate with the elongated holes 3 to achieve ±3mm adjustment) of different specifications. A total adjustment of ±5mm is achieved through the superposition of these two adjustment mechanisms. However, the thin walls on both sides of the elongated holes 3 are prone to casting cracks or deformation. Long-term pressure on the contact area between the limiting bosses 2 and the rail pad plate can easily lead to rubber aging and cracking. The design redundancy of the iron pad plate body 1 length L1 (290mm) and the center distance L3 (233.3mm) of the elongated holes 3 specified in the WJ-8 type fastener system increases material usage and manufacturing costs.

[0032] like Figure 3As shown, this application discloses a steel pad with a wide rail position adjustment range, which is installed in the rail bearing groove. It includes a steel pad body 1, which has a rectangular structure. The steel pad body 1 is characterized by having two symmetrical U-shaped holes 5 along its length. The closed end of each U-shaped hole 5 is semi-circular and is provided with a raised shoulder 4. The raised shoulder 4 is provided with a groove at the position corresponding to the U-shaped hole 5, and the shape of the groove matches the U-shaped hole 5.

[0033] Preferably, the iron pad body 1 has a rectangular planar structure, and the portion of the iron pad body 1 located between the protruding shoulders 4 is used to place the rail pad.

[0034] Preferred, such as Figures 4a-4c As shown, due to tolerances in the manufacturing process, the length L1 of the iron pad body 1 ranges from 283 to 285 mm, the distance L3 between the centers of the closed ends of the U-shaped holes 5 is 216 to 219 mm, and the distance L2 between the inner sides of the symmetrically arranged protruding shoulders 4 is 170 to 172 mm.

[0035] By redesigning the iron pad, we can ensure compatibility with existing sleeper / track slab interface dimensions while reducing material consumption and manufacturing costs by shrinking the size.

[0036] Preferably, the raised shoulder 4 is a trapezoidal platform structure, and the upper end of the raised shoulder 4 is provided with two symmetrical protrusions 6 in the extension direction.

[0037] Preferably, the iron pad is made of QT450-10 material.

[0038] When it is necessary to adjust the rail position, install the iron pad in the rail bearing groove of the existing sleeper / track slab and fix it with the spiral rail spike. By adjusting the lateral fit between the U-shaped hole 5 and the spiral rail spike, the first-level adjustment of the rail is ±7mm (the original oblong hole design is only ±3mm). Replace the insulating gauge block of different specifications with the raised shoulder 4 to achieve the second-level adjustment of the rail ±3mm (the original shoulder design is only ±2mm).

[0039] Therefore, by superimposing two levels of adjustment, the total adjustment range reaches ±10mm, meeting the needs for large-scale position adjustments in geologically complex sections. This effectively solves the risk of track gauge exceeding limits in geologically complex sections and lines with large construction errors, significantly reducing the frequency of maintenance operations. Simultaneously, by using U-shaped holes instead of the oblong holes in existing technology, the risk of casting defects in thin-walled areas is eliminated, improving the crack resistance and service life of the iron pad. Furthermore, the iron pad body in this case has a rectangular planar structure, eliminating the limiting boss, avoiding the problem of aging and cracking of the rail pad, and reducing the overall weight of the iron pad by nearly 20%, thus reducing material consumption and manufacturing costs.

[0040] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A tie plate having a wide rail position adjustment range, installed in a rail bearing groove, comprising a tie plate body, the tie plate body being a rectangular structure, characterized in that, Two symmetrical U-shaped holes are provided along the length of the iron pad body. The closed end of the U-shaped hole is semi-circular and each hole is provided with a raised shoulder. The raised shoulder is provided with a groove at the position corresponding to the U-shaped hole, and the shape of the groove matches the U-shaped hole.

2. The iron backplate according to claim 1, wherein The iron pad body has a rectangular planar structure, and the portion of the iron pad body located between the protruding shoulders is used to place the rail pad.

3. The iron rail pad of claim 2, wherein The length of the iron pad body ranges from 283 to 285 mm, and the distance between the centers of the closed ends of the U-shaped holes is 216 to 219 mm.

4. The iron rail pad as claimed in claim 1 or 3, wherein The distance between the inner sides of the symmetrically arranged protruding shoulders is 170-172 mm.

5. The iron backplate as claimed in claim 1, wherein The raised shoulder has a trapezoidal platform structure, and two symmetrical protrusions are provided at the upper end of the raised shoulder in the extension direction.

6. The iron pad as described in claim 1, characterized in that, The iron pad is made of QT450-10 material.

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