Railway rail flangeway insert assembly

Abstract

The application provides a rail wheel flange groove embedding assembly arranged in a wheel flange groove on a track bed, comprising an inner rail side embedding part between an inner rail side of a steel rail and an inner wall of one side of the wheel flange groove, an outer rail side embedding part between the inner rail side of the steel rail and an inner wall of the other side of the wheel flange groove, and at least two embedding pads. The embedding pad comprises a pad main body and a protruding part extending from a side of the pad main body close to the steel rail to the direction of the steel rail, the shape of the protruding part matches the rail waist of the steel rail, can better fit the shape of the steel rail, and can stably install the embedding pad in the wheel flange groove. The at least two embedding pads are arranged below the inner rail side embedding part and the outer rail side embedding part respectively, can support the inner rail side embedding part and the outer rail side embedding part, and can stably install the inner rail side embedding part and the outer rail side embedding part on both sides of the steel rail. The split combined structure is convenient to install, adjust and maintain in later period, and has lower maintenance cost.

Description

Technical Field

[0001] This invention belongs to the field of track component technology, specifically relating to a track wheel flange groove fitting assembly. Background Technology

[0002] A railway level crossing is a location where rail transit lines, including national railways, subways, and suburban railways, intersect with highways and urban roads on the same plane. When a railway intersects a road, a level crossing is usually set up at a suitable location if the road traffic volume is low or there are no conditions for an grade-separated intersection. Railway crossings are vital arteries connecting rail and road transport; their proper functioning directly impacts railway traffic safety and the safety of people's lives and property.

[0003] At railway level crossings, to ensure smooth vehicle passage and protect the rails, flange grooves are typically installed on the ballast bed, and the rails are installed within these grooves. Due to the installation requirements of rail fasteners and other accessories, sufficient space must be left on both sides of the rail; therefore, the flange grooves cannot be too narrow. However, this also makes it easier for foreign objects to fall into the flange grooves, posing a potential safety hazard.

[0004] To avoid this phenomenon, existing technologies typically install pressure strips or inserts on both sides of the rail to seal the wheel flange groove. However, existing pressure strips or inserts have poor fit with the rail structure, and installation and adjustment are time-consuming and labor-intensive. Later maintenance and replacement are also troublesome and costly. Summary of the Invention

[0005] This invention is made to solve the above-mentioned problems, and its purpose is to provide a track wheel flange groove fitting assembly. The technical solution adopted by this invention is as follows:

[0006] This invention provides a track flange groove fitting assembly, disposed within the flange groove on a track bed. It is characterized by comprising: an inner rail-side fitting member located between the inner rail side of the rail and one inner wall of the flange groove; an outer rail-side fitting member located between the inner rail side of the rail and the other inner wall of the flange groove; and at least two fitting pads, respectively disposed below the inner and outer rail-side fitting members, for supporting the inner and outer rail-side fitting members. Each fitting pad includes a pad body and a protrusion extending from the side of the pad body closest to the rail towards the rail, the shape of which matches the rail web.

[0007] The track flange groove fitting assembly provided by the present invention may also have the following technical features: the pad block body is elongated and arranged along the extension direction of the rail, the top and bottom surfaces of the pad block body are parallel planes, and the two sides of the pad block body are inclined surfaces that slope from the bottom to the middle.

[0008] The rail flange groove fitting assembly provided by the present invention may also have the following technical features: the bottom of the pad block body near both ends has an installation port that matches the fasteners or sleepers of the rail.

[0009] The track wheel flange groove fitting assembly provided by the present invention may also have the following technical features: wherein the pad block body has a weight reduction hole, which is vertically opened on the upper part of the pad block body.

[0010] The track wheel rim groove fitting assembly provided by the present invention may also have the following technical features: wherein the weight reduction hole is a conical hole, and the diameter of the weight reduction hole near the surface of the pad body is larger than the diameter away from the surface of the pad body.

[0011] The track flange groove fitting assembly provided by the present invention may also have the following technical feature: wherein the bottom of the pad block body has an inwardly inclined chamfer on the side away from the rail.

[0012] The track flange groove fitting assembly provided by the present invention may also have the following technical feature: wherein the bottom edge of the pad block body near the rail has a notch.

[0013] The track wheel rim groove fitting assembly provided by the present invention may also have the following technical feature: wherein the protrusion is integrally formed with the pad block body.

[0014] The rail flange groove fitting assembly provided by the present invention may also have the following technical features: the inner rail side fitting and the outer rail side fitting are both elongated and arranged along the extension direction of the rail. The cross-section of the inner rail side fitting is L-shaped and the cross-section of the outer rail side fitting is rectangular. The top surfaces of the inner rail side fitting and the outer rail side fitting are flush with the top surface of the rail.

[0015] The track flange groove fitting assembly provided by the present invention may also have the following technical feature: wherein the fitting pad, the inner rail side fitting member, and the outer rail side fitting member are all of equal length in the extension direction of the rail.

[0016] Invention Function and Effect

[0017] According to the present invention, a track flange groove fitting assembly is disposed within a flange groove on a track bed. The assembly includes an inner rail-side fitting member located between the inner rail side of the rail and one inner wall of the flange groove; an outer rail-side fitting member located between the inner rail side of the rail and the other inner wall of the flange groove; and at least two fitting pads. Each fitting pad includes a pad body and a protrusion extending from the side of the pad body closest to the rail towards the rail. The shape of the protrusion matches the rail web, allowing for better conformity to the rail shape and stable installation of the fitting pad within the flange groove. At least two fitting pads are respectively disposed below the inner and outer rail-side fitting members, supporting them and ensuring stable installation of the inner and outer rail-side fitting members on both sides of the rail.

[0018] Therefore, the track flange groove fitting assembly of the present invention is installed inside the flange groove, achieving a good fit with the track structure. This prevents foreign objects from falling into the flange groove and improves the flatness of the level crossing, allowing vehicles and trains to pass smoothly. The track flange groove fitting assembly has a simple structure, and its modular assembly facilitates installation and adjustment, making the construction process more time-saving and labor-saving. It also facilitates later maintenance, allowing for the replacement of the inner rail-side fitting component, outer rail-side fitting component, or fitting pad according to aging or damage, resulting in low maintenance costs. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the track wheel flange groove fitting assembly in Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the interlocking pad and the rail in Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the interlocking pad block in Embodiment 1 of the present invention;

[0022] Figure 4 This is a cross-sectional view of the track rim groove fitting assembly in Embodiment 2 of the present invention; and

[0023] Figure 5 This is a schematic diagram of the interlocking pad block in Embodiment 2 of the present invention. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the track wheel flange groove fitting assembly of the present invention will be specifically described below in conjunction with embodiments and accompanying drawings.

[0025] <Example 1>

[0026] Figure 1 This is a cross-sectional view of the track wheel flange groove fitting assembly in Embodiment 1 of the present invention.

[0027] like Figure 1 As shown, the present invention provides a track flange groove fitting assembly 100, which is disposed in the flange groove on the track bed 1. The flange groove has a boss 3 in the middle, which is the same width as the bottom of the rail 2, and the rail 2 is located directly above the boss 3.

[0028] The track flange groove fitting assembly 100 includes an inner rail side fitting 10, an outer rail side fitting 20, and at least two fitting pads 30.

[0029] The inner rail-side fitting 10 is located between the inner rail side of the rail 2 and the inner wall of one side of the wheel flange groove. In this embodiment, the inner rail-side fitting 10 is made of rubber, is elongated, and is arranged along the extension direction of the rail 2. The cross-section of the inner rail-side fitting 10 is L-shaped, including a horizontal part 11 and a vertical part 12. One side of the horizontal part 11 abuts against the rail web 4 of the rail 2, and the vertical part 12 is located on the other side of the horizontal part 11 and abuts against the inner wall of the wheel flange groove to avoid interference with the wheel flange of the train wheel. The bottom surface of the vertical part 12 is flush with the bottom surface of the horizontal part 11, making the bottom of the inner rail-side fitting 10 flat and facilitating stable installation; the top surface of the vertical part 12 is flush with the top surface of the rail 2, which can protect the rail 2 and help improve the overall flatness of the road surface at the crossing.

[0030] The outer rail-side fitting 20 is located between the inner rail side of the rail 2 and the inner wall of the flange groove on the other side. In this embodiment, the outer rail-side fitting 20 is made of rubber, is elongated, and is positioned along the extension direction of the rail 2. The cross-section of the outer rail-side fitting 20 is rectangular, with one side abutting against the inner wall of the flange groove and the other side abutting against the top side of the rail 2. The top surface of the outer rail-side fitting 20 is flush with the top surface of the rail 2, which protects the rail 2 and helps improve the overall smoothness of the road surface at the level crossing.

[0031] Two mating pads 30 are symmetrically arranged on both sides of the rail 2, and are located below the inner rail-side mating member 10 and the outer rail-side mating member 20, respectively, and can support the inner rail-side mating member 10 and the outer rail-side mating member 20. The mating pad 30 includes a pad body 31 and a protrusion 32. In this embodiment, the mating pad 30 is made by rubber powder molding process, and the protrusion 32 is integrally formed with the pad body 31.

[0032] Figure 2 This is a schematic diagram of the interlocking pad and the rail in Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of the interlocking pad block in Embodiment 1 of the present invention.

[0033] like Figure 2 , 3As shown, the pad body 31 is elongated and extends along the rail 2. The top and bottom surfaces of the pad body 31 are parallel planes. The top surface of the pad body 31 is in contact with the bottom surface of the inner rail side fitting 10 or the outer rail side fitting 20, and the bottom surface of the pad body 31 is in contact with the bottom surface of the wheel flange groove. Both sides of the pad body 31 are inclined surfaces sloping towards the center, facilitating manufacturing. The two sides of the pad body 31 form gaps with the inner wall of the wheel flange groove and the side wall of the boss 3, respectively. The bottom of the side of the pad body 31 furthest from the rail 2 also has an inwardly inclined chamfer 313, which serves as a guide during installation, improving installation efficiency.

[0034] The pad body 31 also has weight-reducing holes 311. These holes 311 are vertically oriented at the top of the pad body 31. Without affecting the performance of the mating pad 30, the weight-reducing holes 311 can reduce the weight of the mating pad 30, decrease material costs, shorten vulcanization molding time, and improve production efficiency. In this embodiment, three weight-reducing holes 311 are provided, arranged at equal intervals along the rail extension direction. All three weight-reducing holes 311 are conical holes, with the diameter of the holes near the surface of the pad body 31 being larger than the diameter away from the surface, facilitating demolding during production.

[0035] The pad block body 31 also has two mounting ports 312 that match the fasteners 5 or sleepers of the rail 2. The two mounting ports 312 are symmetrically arranged at the bottom of the pad block body 31 near both ends along the length of the rail 2, which can prevent the pad block body 31 from interfering with the fasteners 5 or sleepers, and at the same time restrict the installation position of the pad block body 31 to prevent the pad block body 31 from shifting.

[0036] The protrusion 32 extends from the side of the pad body 31 near the rail 2 toward the rail 2, and the shape of the protrusion 32 matches the rail web 4 of the rail 2. The lower surface 321 of the protrusion 32 fits against the lower part of the rail web 4, so that the fitting pad 30 can be stably installed in the wheel flange groove.

[0037] The length of the protrusion 32 in the extension direction of the rail is the same as that of the pad body 31. The length of the mating pad 30, the inner rail side mating member 10, and the outer rail side mating member 20 in the extension direction of the rail are all equal.

[0038] In this embodiment, the mating pad 30 is manufactured using an improved rubber powder molding process, which specifically includes the following steps:

[0039] Step S1 involves pulverizing and drying the rubber product to obtain rubber powder. The specific process is as follows:

[0040] Waste rubber products are cut and crushed, and rubber powder with a mesh size of 24 is screened out. The powder is then dried to a moisture content of ≤0.5% to obtain rubber powder.

[0041] Step S2 involves mixing the rubber powder and adhesive evenly to obtain rubber powder. The specific process is as follows:

[0042] Polyurethane adhesive (i.e., adhesive) and rubber powder are mixed, wherein the mass fraction of polyurethane adhesive in the mixture is 8%. The mixture is stirred in a mixer for 3-5 minutes to obtain rubber powder. The rubber powder needs to be sent for hot pressing within 30 minutes to prevent the polyurethane adhesive from curing and failing.

[0043] Polyurethane adhesives, containing highly polar isocyanate and urethane groups, exhibit high reactivity, can cure at room temperature, and demonstrate excellent adhesive properties to various materials such as metals, rubber, and plastics. The main chain of polyurethane is highly flexible, its greatest strength being its resistance to impact vibration and flexural fatigue, high peel strength, and exceptionally excellent low-temperature performance, making it a leader among existing adhesives. Polyurethane adhesives are easy to process, curing at both room temperature and with heating, and have wide applications in various fields. This example uses rubber powder, which also possesses similar properties to polyurethane, such as impact vibration resistance and fatigue resistance. By mixing these materials in a specific ratio and then subjecting them to heating and pressure treatment, high-strength rubber powder products can be produced. These products are soft and elastic, vibration-resistant, noise-absorbing, and fatigue-resistant.

[0044] Step S3 involves hot-pressing the adhesive powder into shape. The specific process is as follows:

[0045] The molding machine is preheated to heat the molding die for the interlocking pad. The heating method is steam heating or oil temperature machine heating. When the temperature of the molding die reaches 150°C, the adhesive powder is poured into the molding die, and hot pressing is performed. The hot pressing pressure is 15MPa, and the time is 30 minutes. The shape of the molding die corresponds to the structure of the interlocking pad 30.

[0046] Through the above steps, a rubber mating pad 30 can be manufactured. In this embodiment, the density of the mating pad 30 manufactured using the above rubber powder molding process is 0.62 g / cm³. 3 .

[0047] <Example 2>

[0048] This second embodiment provides a track rim groove fitting assembly, which differs from the first embodiment only in the bottom structure of the pad body. For ease of explanation, the same symbols are used for structures identical to those in the first embodiment in this second embodiment, and the same descriptions are omitted.

[0049] Figure 4 This is a cross-sectional view of the track flange groove fitting assembly in Embodiment 2 of the present invention. Figure 5 This is a schematic diagram of the interlocking pad block in Embodiment 2 of the present invention.

[0050] like Figure 4 , 5 As shown, in this embodiment, the bottom edge of the pad body 31' near the rail 2 has a notch 314'. The depth of the notch 314' in the vertical direction is the same as the height of the boss 3, which facilitates installation. In actual installation, there may be debris that is difficult to clean at the bottom edge of the wheel flange groove. Setting a notch 314' at the bottom of the pad body 31' can reduce the bottom area of ​​the pad body 31', reduce the impact of debris in the wheel flange groove on the pad body 31', and facilitate efficient installation.

[0051] Functions and effects of the embodiments

[0052] According to the present invention, a track flange groove fitting assembly is disposed within a flange groove on a track bed. The assembly includes an inner rail-side fitting member located between the inner rail side of the rail and one inner wall of the flange groove; an outer rail-side fitting member located between the inner rail side of the rail and the other inner wall of the flange groove; and at least two fitting pads. Each fitting pad includes a pad body and a protrusion extending from the side of the pad body closest to the rail towards the rail. The shape of the protrusion matches the rail web, allowing for better conformity to the rail shape and stable installation of the fitting pad within the flange groove. At least two fitting pads are respectively disposed below the inner and outer rail-side fitting members, supporting them and ensuring stable installation of the inner and outer rail-side fitting members on both sides of the rail.

[0053] In addition, the pad body also has weight-reducing holes. These holes are vertically formed at the top of the pad body. Without affecting the performance of the mating pad, the weight-reducing holes can reduce the weight of the mating pad, reduce material costs, shorten vulcanization molding time, and improve production efficiency. All weight-reducing holes are conical holes, and the diameter of the weight-reducing holes near the surface of the pad body is larger than the diameter further away from the surface of the pad body, which facilitates demolding during production.

[0054] The pad block body also has mounting ports that match the fasteners or sleepers of the rail. The two mounting ports are symmetrically arranged at the bottom of the pad block body near both ends along the length of the rail. This can prevent the pad block body from interfering with the fasteners or sleepers, and at the same time, it can restrict the installation position of the pad block body, prevent the pad block body from shifting, and improve the stability of the overall structure.

[0055] Therefore, the track flange groove fitting assembly of the present invention is installed inside the flange groove, achieving a good fit with the track structure. This prevents foreign objects from falling into the flange groove and improves the flatness of the level crossing, allowing vehicles and trains to pass smoothly. The track flange groove fitting assembly has a simple structure, and its modular assembly facilitates installation and adjustment, making the construction process more time-saving and labor-saving. It also facilitates later maintenance, allowing for the replacement of the inner rail-side fitting component, outer rail-side fitting component, or fitting pad according to aging or damage, resulting in low maintenance costs.

[0056] The above embodiments are only used to illustrate specific implementations of the present invention, and the present invention is not limited to the scope of the description of the above embodiments.

[0057] In the above embodiments, the pad body is made using an improved rubber powder molding process. In an alternative, the pad body can also be made using a rubber powder molding process in the prior art, such as the process disclosed in CN113427692A, which can also achieve the corresponding technical effects.

Claims

1. A track flange groove fitting assembly, disposed within a flange groove on a track bed, wherein the flange groove has a boss in the middle with the same width as the bottom of the rail, characterized in that, include: The inner rail side fitting is located between the inner rail side of the rail and one inner wall of the wheel flange groove. An outer rail side fitting is located between the outer rail side of the rail and the inner wall of the other side of the flange groove; and At least two mating pads are respectively disposed below the inner rail-side mating member and the outer rail-side mating member, for supporting the inner rail-side mating member and the outer rail-side mating member. The fitting pad includes a pad body and a protrusion extending from the side of the pad body near the rail toward the rail. The shape of the protrusion matches the web of the rail. The pad block is mainly elongated and is arranged along the extension direction of the rail. The side of the pad block away from the rail is a sloping surface that slopes from the bottom towards the middle. The bottom of the pad block body on the side away from the rail also has an inwardly inclined chamfer, which serves as a guide during installation. The bottom edge of the pad block body near the rail has a notch, the depth of which in the vertical direction matches the height of the boss, in order to reduce the bottom area of ​​the pad block body. The bottom of the pad body has mounting holes near both ends that match the fasteners or sleepers of the rail, which are used to prevent the pad body from interfering with the fasteners or sleepers and to limit the installation position of the pad body.

2. The track rim groove fitting assembly according to claim 1, characterized in that: in, The top and bottom surfaces of the pad block body are parallel planes. The interlocking pad is made of rubber powder molding process and has a density of 0.62 g / cm³. 3 .

3. The track rim groove fitting assembly according to claim 1, characterized in that: in, The main body of the pad has weight-reducing holes. The weight-reducing holes are vertically formed on the upper part of the pad body.

4. The track rim groove fitting assembly according to claim 3, characterized in that: in, The weight-reducing hole is a conical hole, and the diameter of the weight-reducing hole near the surface of the pad body is larger than the diameter away from the surface of the pad body.

5. The track rim groove fitting assembly according to claim 1, characterized in that: in, The protrusion is integrally formed with the main body of the pad.

6. The track rim groove fitting assembly according to claim 1, characterized in that: in, Both the inner rail-side fitting and the outer rail-side fitting are elongated strips and are arranged along the extension direction of the rail. The cross-section of the inner rail side fitting is L-shaped. The cross-section of the outer rail side fitting is rectangular. The top surfaces of both the inner rail side fitting and the outer rail side fitting are flush with the top surface of the rail.

7. The track rim groove fitting assembly according to claim 6, characterized in that: in, The lengths of the fitting pad, the inner rail side fitting, and the outer rail side fitting are all equal in the extension direction of the rail.

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