Sleeper for installing auxiliary rail

Abstract

The invention discloses a sleeper for mounting an auxiliary rail, and relates to the field of railway track engineering, the sleeper comprises a sleeper body and two rail bearing tables located on the sleeper body, and stock rail mounting parts are arranged on the rail bearing tables; the two auxiliary rail mounting parts are positioned between the two rail bearing tables; and the stock rail mounting part and the auxiliary rail mounting part are both used for mounting steel rails. The sleeper for installing the auxiliary rail is provided to solve the problems that in the prior art, a rail frame is limited in rigidity, large in derailing risk, insufficient in adaptability and the like, and the purposes that the rail structure performance is improved, driving safety is guaranteed, and meanwhile an existing production process and maintenance operation are compatible are achieved.

Description

Technical Field

[0001] This invention relates to the field of railway track engineering, and specifically to a sleeper for installing auxiliary rails. Background Technology

[0002] As a core load-bearing component of railway tracks, the structural design of railway sleepers directly affects the overall rigidity of the track, the smoothness of train operation, and traffic safety. In existing technology, conventional sleepers are only used to support two rails, thus requiring only two sets of track installation structures. With the continuous development of rail transit technology, this existing technology has at least the following shortcomings:

[0003] 1. The track frame has limited stiffness. When a train passes at high speed or under heavy load, the elastic distribution of the lower foundation is uneven, which can easily generate large impact loads, resulting in poor train running stability and ride comfort, and at the same time aggravating fatigue damage to the track structure.

[0004] 2. The lack of an effective derailment protection mechanism means that if a train derails at high speed, the wheels are likely to leave the track, causing secondary safety accidents and posing a great danger.

[0005] 3. Some improved sleepers designed to enhance structural rigidity or add derailment protection often have complex structures and production processes that are incompatible with existing production lines, leading to a significant increase in production costs. Or, due to unreasonable structural layout, they may affect routine maintenance operations such as track bed tamping and cleaning.

[0006] 4. Limited adaptability: Most improved sleepers are only applicable to either ballasted or ballastless tracks, making it difficult to meet the general requirements of different track types.

[0007] Therefore, there is an urgent need to develop a new type of sleeper that can improve the performance of the track structure, ensure traffic safety, be compatible with existing production processes and maintenance operations, and be suitable for various track types. Summary of the Invention

[0008] This invention provides a sleeper for installing auxiliary rails to solve the problems of limited rigidity of the track frame, high risk of derailment, and insufficient adaptability in the prior art, thereby improving the performance of the track structure, ensuring traffic safety, and being compatible with existing production processes and maintenance operations.

[0009] This invention is achieved through the following technical solution:

[0010] A sleeper for installing auxiliary rails includes a sleeper body and two rail support platforms located on the sleeper body, wherein a main rail mounting part is provided on the rail support platform; it also includes two auxiliary rail mounting parts located between the two rail support platforms; both the main rail mounting parts and the auxiliary rail mounting parts are used for installing steel rails.

[0011] To address the problems of limited track frame stiffness, high derailment risk, and insufficient adaptability in existing technologies, this application proposes a sleeper for installing auxiliary rails. The sleeper body has two rail support platforms, which are conventional sleeper structures. This application also includes two auxiliary rail mounting sections between the two rail support platforms; therefore, the sleeper body has two basic rail mounting sections and two auxiliary rail mounting sections, allowing for the installation of four rails.

[0012] When in use, this application is normally installed on the ballast bed (ballooned track) or concrete base (ballastless track). The train runs on two rails on the two main rail mounting sections. At this time, the two steel rails located on the two auxiliary rail mounting sections can form a lateral protective barrier. When the train derails, the wheels will be blocked by these two steel rails, avoiding derailment accidents caused by leaving the track range, and significantly improving the driving safety factor. Therefore, this application is particularly suitable for high-risk operating scenarios such as heavy loads and high speeds. At the same time, compared with the complex anti-derailment sleepers or the addition of other external anti-derailment facilities in the prior art, this application can use the existing production process and equipment of prestressed concrete sleepers, without the need to add additional sleeper production lines. According to the inventor team's verification, the production cost of this application is only 5%-8% higher than that of traditional sleepers, but the performance is comprehensively improved, while reducing the later maintenance costs and safety accident losses, which has significant economic benefits.

[0013] Furthermore, the sleepers of this application can be used to form a track structure with a four-rail frame, which increases the overall rigidity of the track by more than 30%, makes the elastic distribution of the underlying foundation more uniform when the train is running, reduces the impact load by 20%-25%, and thus effectively improves the smoothness of train operation and ride comfort, while reducing the fatigue damage rate of the track structure.

[0014] Furthermore, this application is compatible with both ballasted and ballastless tracks, has a wide range of applications, and can be directly applied to heavy-haul high-speed railways, passenger and freight railways, and urban rail transit without requiring structural adjustments for different track types, demonstrating strong adaptability.

[0015] Furthermore, the basic rail installation section includes a rail groove opened on the top surface of the rail support platform for accommodating the two steel rails required for train operation.

[0016] Furthermore, the surface of the basic rail mounting section is provided with a plurality of basic rail fastener mounting holes; the basic rail fastener mounting holes are matched with the fastener system of the rail required for train operation, and are used to install the corresponding fastener system.

[0017] Furthermore, the surface of the auxiliary rail mounting part is provided with a plurality of auxiliary rail fastener mounting holes; the auxiliary rail fastener mounting holes are matched with the fastener system of the rail installed on the auxiliary rail mounting part, and are used to install the corresponding fastener system.

[0018] Furthermore, the two main rail mounting sections and the two auxiliary rail mounting sections are symmetrically distributed along the centerline of the sleeper body. This design allows the four installed rails to also be symmetrically distributed on the sleeper of this application, resulting in a more uniform and stable stiffness distribution, and consequently, a more uniform elastic distribution of the substructure during train operation.

[0019] Furthermore, the center-to-center lateral distance between adjacent basic rail mounting sections and auxiliary rail mounting sections is 400~600mm. That is, the distance between the lateral center of the basic rail mounting section and the lateral center of the auxiliary rail mounting section is 400~600mm.

[0020] In this application, "lateral" refers to the length direction of the sleeper body. This solution ensures an effective protective gap between the auxiliary rails and the main rails after the installation of four rails, while avoiding any impact on track dynamics. Furthermore, this solution avoids the tamping area, allowing tamping equipment to be inserted normally into the bottom and sides of the sleeper for operation without disassembling the auxiliary rails, thus preventing disruption to routine maintenance efficiency.

[0021] Furthermore, the length of the sleeper body is 2400~2800mm, the width is 300~340mm, and the height is 180~260mm. Within this size range, the sleeper of this application is compatible with existing standard sleepers, facilitating laying construction and avoiding the need for additional specialized laying tools or processes.

[0022] Furthermore, the bottom surface of the sleeper body is provided with anti-slip protrusions and / or anti-slip grooves, which can enhance the bonding stability between the sleeper and the track bed (ballast track) or concrete base (ballastless track).

[0023] Furthermore, basic rails are installed on the basic rail mounting section, and auxiliary rails are installed on the auxiliary rail mounting section. The basic rails are used for the normal operation of the train.

[0024] Furthermore, the lateral spacing between adjacent main rails and auxiliary rails is 480~520mm. This scheme can better ensure that the tamping equipment can normally extend into the bottom and sides of the main rails for operation, avoiding interference with maintenance and repair work.

[0025] Compared with the prior art, the present invention has at least the following advantages and beneficial effects:

[0026] 1. The present invention provides a sleeper for installing auxiliary rails. The two steel rails located above the two auxiliary rail mounting parts can form a lateral protective barrier, which can prevent the train from derailing and causing a derailment accident when it derails, thus greatly improving the safety factor of train operation. Compared with the complex anti-derailment sleepers or the addition of other external anti-derailment facilities in the prior art, this application can use the existing production process and equipment of prestressed concrete sleepers without adding an additional sleeper production line.

[0027] 2. The present invention provides a sleeper for installing auxiliary rails, which is compatible with both ballasted and ballastless tracks, increases the overall rigidity of the track by more than 30%, makes the elastic distribution of the underlying foundation more uniform during train operation, reduces impact load by 20%-25%, thereby effectively improving the stability and ride comfort of train operation, while reducing the fatigue damage rate of the track structure.

[0028] 3. The present invention provides a sleeper for installing auxiliary rails, which can form a track structure with a four-rail frame. It has a wide range of applications and can be directly applied to heavy-haul high-speed railways, passenger and freight railways and urban rail transit. It does not require structural adjustments for different track types and has strong adaptability.

[0029] 4. The present invention provides a sleeper for installing auxiliary rails, which can avoid the tamping operation area of ​​the track bed, allowing the tamping equipment to be normally inserted into the bottom and sides of the sleeper for operation without disassembling the auxiliary rails, thus avoiding affecting the efficiency of routine maintenance and repair.

[0030] 5. The present invention provides a sleeper for installing auxiliary rails, which is compatible with existing standard sleepers, facilitates laying construction, and avoids the need for additional special laying tools or processes. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a front view of a specific embodiment of the present invention;

[0033] Figure 2 This is a top view of a specific embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram illustrating the usage state of a specific embodiment of the present invention.

[0035] The attached diagram shows the markings and corresponding component names:

[0036] 1-Sleeper body, 2-Main rail mounting part, 3-Auxiliary rail mounting part, 4-Main rail fastener mounting hole, 5-Auxiliary rail fastener mounting hole, 6-Main rail, 7-Auxiliary rail. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for explaining the invention only and are not intended to limit the invention. In the description of this application, it should be understood that terms such as "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "high," "low," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not 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 limiting the scope of protection of this application.

[0038] Example 1:

[0039] like Figures 1 to 3 The diagram shows a sleeper for installing auxiliary rails, comprising a sleeper body 1 and two rail support platforms located on the sleeper body 1. The sleeper is characterized by having a main rail mounting section 2 on each rail support platform; it also includes two auxiliary rail mounting sections 3 located between the two rail support platforms; both the main rail mounting section 2 and the auxiliary rail mounting sections 3 are used for mounting steel rails. Specifically, the main rail mounting section 2 is used to mount a main steel rail 6, and the auxiliary rail mounting sections 3 are used to mount an auxiliary steel rail 7.

[0040] The surface of the basic rail mounting part 2 is provided with a plurality of basic rail fastener mounting holes 4. The surface of the auxiliary rail mounting part 3 is provided with a plurality of auxiliary rail fastener mounting holes 5.

[0041] In this embodiment, the basic rail mounting part 2 includes a rail bearing groove opened on the top surface of the rail bearing platform; the basic rail fastener mounting hole 4 is located in the rail bearing groove. The auxiliary rail mounting part 3 is located on the upper surface of the sleeper body, that is, the auxiliary rail does not have a rail bearing platform, but is directly installed on the sleeper body 1, which avoids interfering with the normal operation of the train, and at the same time facilitates the use of existing sleeper production processes and equipment, thereby controlling production costs.

[0042] In this embodiment, the two basic rail mounting parts 2 and the two auxiliary rail mounting parts 3 are symmetrically distributed along the centerline of the length direction of the sleeper body 1.

[0043] This embodiment uses symmetrically arranged auxiliary rail mounting sections and auxiliary rails to form a four-rail frame structure of "basic rail + auxiliary rail". This increases the overall track stiffness by over 30%, resulting in a more uniform elastic distribution of the underlying foundation during train operation, reducing impact loads by 20%-25%, effectively improving train stability and ride comfort, while also reducing the fatigue damage rate of the track structure. Furthermore, this embodiment offers significant derailment protection: the auxiliary rails form a lateral protective barrier; when a train derails, the wheels are blocked by the auxiliary rails, preventing derailment accidents caused by leaving the track area, greatly improving the driving safety factor, and is particularly suitable for high-risk operating scenarios such as heavy loads and high speeds.

[0044] In a more preferred embodiment, the bottom surface of the sleeper body 1 is provided with anti-slip protrusions and / or anti-slip grooves.

[0045] In the actual production of the sleeper for the installation auxiliary rail of this application, the existing production process of prestressed concrete sleepers is followed, including steel bar assembly, tensioning, concrete pouring, vibration, steam curing, release, and demolding. Only the hole positions of the auxiliary rail fastener installation holes 5 need to be reserved in advance to obtain the sleeper for the installation auxiliary rail of this application.

[0046] During the laying stage: If this application is applied to ballasted track, the sleeper body 1 can be laid on the track bed at a set density (e.g., 1667 sleepers / km). After adjusting the smoothness, the basic rail 6 is fixed with elastic fasteners through the basic rail fastener mounting holes 4, and the auxiliary rail 7 is fixed with fasteners through the auxiliary rail fastener mounting holes 5. If this application is applied to ballastless track, the sleeper body 1 is laid in the concrete track bed slab, and the basic rail 6 and auxiliary rail 7 are fixed in the same way.

[0047] Example 2:

[0048] A sleeper for installing auxiliary rails, based on embodiment 1, wherein the length of the sleeper body (1) is 2400~2800mm, the width is 300~340mm, and the height is 180~260mm.

[0049] In this embodiment, the center lateral distance between adjacent basic rail mounting parts 2 and auxiliary rail mounting parts 3 is 400~600mm, and / or, the lateral distance between adjacent basic rails 6 and auxiliary rails 7 is 480~520mm.

[0050] In this embodiment, when tamping the track bed during the railway maintenance and repair stage, the tamping equipment can be directly inserted into the bottom and sides of the sleeper body 1. The position of the auxiliary rail 7 does not interfere with the equipment's travel, and maintenance and repair can be completed without disassembling the auxiliary rail.

[0051] Example 3:

[0052] A sleeper for installing auxiliary rails, based on embodiment 1, wherein the sleeper body 1 of this embodiment is made of prestressed concrete, with a length of 2600mm, a width of 320mm, and a height of 230mm, is compatible with the dimensions of existing Type III prestressed concrete sleepers, and the production process completely follows the existing process.

[0053] The rail support groove on the top surface of the rail support platform is 360mm long and 40mm deep. Each rail support groove has two basic rail fastener installation holes 4 with a hole spacing of 233mm, which are used to fix the basic steel rail with a specification of 60kg / m through fasteners.

[0054] The auxiliary rail mounting section 3 is a partial area on the top surface of the sleeper body 1, defined as the auxiliary rail bearing surface. Each auxiliary rail bearing surface has two auxiliary rail fastener mounting holes 5 with a hole spacing of 186mm, which are used to fix the 60kg / m auxiliary steel rail 7 with fasteners.

[0055] In this embodiment, the center distance between the basic rail 6 and the auxiliary rail 7 is 576mm, and the net distance between the rail head of the auxiliary rail and the basic rail is 500mm, ensuring that the tamping equipment can be normally extended into the bottom and sides of the basic rail for operation, avoiding interference with maintenance and repair work.

[0056] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0057] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Furthermore, the term “connection” as used herein, unless otherwise specified, can mean a direct connection or an indirect connection via other components.

Claims

1. A sleeper for installing auxiliary rails, comprising a sleeper body (1) and two rail support platforms located on the sleeper body (1), characterized in that, The rail support platform is provided with a basic rail installation part (2); it also includes two auxiliary rail installation parts (3) located between the two rail support platforms; the basic rail installation part (2) and the auxiliary rail installation part (3) are both used to install rails.

2. A sleeper for installing auxiliary rails according to claim 1, characterized in that, The basic rail installation part (2) includes a rail support groove opened on the top surface of the rail support platform.

3. A sleeper for installing auxiliary rails according to claim 1, characterized in that, The surface of the basic rail mounting part (2) is provided with several basic rail fastener mounting holes (4).

4. A sleeper for installing auxiliary rails according to claim 1, characterized in that, The surface of the auxiliary rail mounting part (3) is provided with several auxiliary rail fastener mounting holes (5).

5. A sleeper for installing auxiliary rails according to claim 1, characterized in that, The two basic rail mounting parts (2) and the two auxiliary rail mounting parts (3) are symmetrically distributed along the centerline of the length direction of the sleeper body (1).

6. A sleeper for installing auxiliary rails according to claim 1, characterized in that, The center lateral distance between adjacent basic rail mounting parts (2) and auxiliary rail mounting parts (3) is 400~600mm.

7. A sleeper for installing auxiliary rails according to claim 1, characterized in that, The length of the sleeper body (1) is 2400~2800mm, the width is 300~340mm, and the height is 180~260mm.

8. A sleeper for installing auxiliary rails according to claim 1, characterized in that, The bottom surface of the sleeper body (1) is provided with anti-slip protrusions and / or anti-slip grooves.

9. A sleeper for installing auxiliary rails according to claim 1, characterized in that, The basic rail (6) is installed on the basic rail mounting part (2), and the auxiliary rail (7) is installed on the auxiliary rail mounting part (3).

10. A sleeper for installing auxiliary rails according to claim 9, characterized in that, The lateral spacing between adjacent basic rails (6) and auxiliary rails (7) is 480~520mm.

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