Device for limiting vertical and transverse movement of ballastless track base plate
By using mortise and tenon structures and vertical displacement limiting mechanisms, the lateral and vertical displacement problems of the ballastless track base plate are solved, ensuring the stability and safety of the railway, reducing maintenance costs, and improving operational efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG WEIYAN HIGH SPEED RAILWAY CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-21
AI Technical Summary
Lateral and vertical displacement of the ballastless track base plate leads to problems with railway operation safety, comfort and efficiency, including derailment, bumps, swaying, high maintenance costs and low operating efficiency.
The adjacent ballastless track base plates are connected by a mortise and tenon structure, and vertical displacement limiting mechanisms are set on both sides of the gap, including telescopic connecting rods and high-strength bolt connections, to limit lateral displacement and allow longitudinal expansion and contraction to adapt to temperature changes.
It effectively limits the lateral and vertical displacement of the ballastless track base plate, reduces maintenance and repair costs, ensures the stability and safety of the railway, and improves operational efficiency.
Smart Images
Figure CN224148452U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a device for restricting the vertical and lateral movement of a ballastless track base plate, belonging to the field of railway engineering structures. Background Technology
[0002] Railway transportation is a crucial mode of transport. Ballastless track, as an important form of railway track structure, relies heavily on the stability of its base slab to ensure the safe and smooth operation of trains. Lateral and vertical displacement of the ballastless track base slab is a common problem in railway operation, which can adversely affect railway operations. First, lateral and vertical displacement of the ballastless track base plate can lead to train derailment. Some cases show that lateral displacement of the base plate can generate excessive lateral forces on the track during train operation, causing the train to derail and resulting in serious accidents. Second, lateral and vertical displacement of the base plate affects train ride comfort. When the base plate shifts laterally or vertically, the train will experience bumps, swaying, and other instability, impacting the passenger experience. Furthermore, lateral and vertical displacement of the base plate increases maintenance and repair costs. Maintenance not only requires shutting down the railway, reducing transport efficiency, but also necessitates significant investment of manpower and resources for repairs, increasing operating costs. Finally, lateral and vertical displacement of the base plate reduces the efficiency of railway transport. A stable track is fundamental to ensuring high-speed, efficient train operation; lateral and vertical displacement of the base plate limits train speed and load capacity, reducing transport efficiency.
[0003] Therefore, it is urgent to design a device to restrict the vertical and lateral movement of the ballastless track base plate. This device should ensure that the base plate can extend and retract longitudinally to adapt to temperature changes and reduce stress concentration, while restricting lateral and vertical displacement to reduce the hazards caused by the above problems. Utility Model Content
[0004] In view of the above-mentioned problems in the prior art, the present invention provides a device for restricting the vertical and lateral movement of the ballastless track base plate. It can not only extend and retract longitudinally to adapt to temperature changes and reduce stress concentration, but also restrict the vertical and lateral movement of the ballastless track base plate.
[0005] This utility model is achieved through the following technical solution: a device for restricting the vertical and lateral movement of a ballastless track base plate, comprising a ballastless track base plate, characterized in that: tenons and mortises are respectively provided at the ends of two adjacent ballastless track base plates; the two adjacent ballastless track base plates are connected by a mortise and tenon structure; a set of vertical displacement limiting mechanisms is respectively provided on both sides of the gap between the two adjacent ballastless track base plates; the vertical displacement limiting mechanism includes a telescopic connecting rod composed of a metal connecting rod mother body and a connecting rod daughter body that are movably fitted together; bolt holes are provided at the outer ends of both the connecting rod mother body and the connecting rod daughter body; threaded sleeves are pre-embedded on the sides of the two adjacent ballastless track base plates; the connecting rod mother body and the connecting rod daughter body are respectively connected to the threaded sleeves on the sides of the corresponding ballastless track base plates by high-strength bolts to fix the telescopic connecting rod to the sides of the ballastless track base plate.
[0006] In this invention, two adjacent ballastless track base plates are connected by a mortise and tenon structure, which restricts lateral displacement between the ballastless track base plates. By setting a set of vertical displacement limiting mechanisms on both sides of the gap between the two adjacent ballastless track base plates, the vertical displacement of the ballastless track base plates can be restricted by the vertical displacement limiting mechanisms, and the longitudinal movement of the ballastless track base plates can be ensured by the telescopic connecting rods of the vertical displacement limiting mechanisms. This ensures that the base plates can freely expand or contract when the temperature changes, avoiding stress accumulation caused by thermal expansion and contraction.
[0007] Furthermore, the number of mortise and tenon structures is 3-5, and the mortise and tenon structures are symmetrically distributed about the cross-section of the ballastless track base plate.
[0008] Furthermore, the depth of the mortise in the mortise and tenon structure is 25mm.
[0009] Furthermore, the telescopic connecting rod is a rectangular parallelepiped structure, the cross-section of the fitting end between the connecting rod sub-body and the connecting rod mother body is rectangular, and the connecting rod mother body is provided with a rectangular groove that mates with the connecting rod sub-body.
[0010] Furthermore, the ratio between the length of the high-strength bolt embedded in the ballastless track base plate and the length exposed on the outside of the ballastless track base plate is 3:2; the diameter of the high-strength bolt is not less than 30mm.
[0011] Furthermore, the threaded sleeve is made of nylon.
[0012] Furthermore, to prevent the bolts from loosening and to prevent rotation at the connection between the telescopic link and the high-strength bolt, elastic washers are installed between the high-strength bolt and both sides of the telescopic link.
[0013] The beneficial effects of this utility model are as follows: This utility model has a simple structure. Adjacent ballastless track base plates are connected by a mortise and tenon structure, which restricts lateral displacement between the base plates. By setting retractable vertical displacement limiting mechanisms on both sides of the two adjacent ballastless track base plates, both vertical displacement and the ability of the base plates to freely expand or contract with temperature changes are restricted, avoiding stress accumulation caused by thermal expansion and contraction. This utility model effectively limits the vertical and lateral movement of the ballastless track base plates caused by groundwater levels and geological conditions, preventing track unevenness and damage to railway infrastructure due to adverse displacement of the base plates. It also reduces the maintenance and repair costs of the base plates and track structure, ensuring the stability, safety, and sustainability of the railway system. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 yes Figure 1 Enlarged schematic diagram of the connection between the vertical displacement limiting mechanism and the ballastless track base plate;
[0016] Figure 3 This is a schematic diagram of the telescopic linkage in this utility model;
[0017] Figure 4 This is a schematic diagram of the connecting rod body of the telescopic connecting rod in this utility model;
[0018] Figure 5 This is a schematic diagram of the structure of the telescopic linkage body in this utility model;
[0019] In the figure, 1. High-strength bolt, 2. Threaded sleeve, 3. Telescopic connecting rod, 3.1. Connecting rod body, 3.1.1. Bolt hole, 3.2. Connecting rod sub-body, 3.2.1. Bolt hole, 4. Elastic washer, 5. Ballastless track base plate, 6. Mortise and tenon structure of ballastless track base plate, 6.1. Tenon, 6.2. Mortise. Detailed Implementation
[0020] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:
[0021] As shown in the attached figure, a device for restricting the vertical and lateral movement of ballastless track base plates includes a lateral displacement limiting structure and a vertical displacement limiting mechanism. The lateral displacement limiting structure consists of two adjacent ballastless track base plates 5, one of which has a tenon 6.1 at its end, and the other has a mortise 6.2 at its end. The two adjacent ballastless track base plates 5 are connected by a mortise and tenon structure 6 formed by the tenon 6.1 and the mortise 6.2. The number of mortise and tenon structures 6 on the ballastless track base plates depends on local geological conditions. Preferably, the number of mortise and tenon structures 6 is 3-5, and the mortise and tenon structures are symmetrically distributed about the cross-sectional center of the ballastless track base plate. Generally, in areas with better geological conditions, the number can be 3, and in areas with poorer geological conditions, the number can be 5. Preferably, the depth of the mortise 6.2 is 25 mm. The mortise and tenon structure 6 between the ballastless track base plates 5 effectively restricts the lateral displacement of the ballastless track base plates. Vertical displacement limiting mechanisms are installed on both sides of the gap between two adjacent ballastless track base plates, with one set on each side. The vertical displacement limiting mechanism includes a high-strength bolt 1, a threaded sleeve 2, and a telescopic connecting rod 3. The telescopic connecting rod 3 consists of a metal connecting rod body 3.1 and a connecting rod sub-body 3.2 that are movably fitted together. Bolt holes 3.1.1 and 3.2.1 are respectively provided at the outer ends of the connecting rod body 3.1 and the connecting rod sub-body 3.2. A threaded sleeve 2 is pre-embedded on the side of each of the two adjacent ballastless track base plates 5. The connecting rod body 3.1 and the connecting rod sub-body 3.2 are threadedly connected to the corresponding threaded sleeve 2 on the side of the ballastless track base plate 5 by high-strength bolts 1, thereby fixing the telescopic connecting rod 3 to the side of the ballastless track base plate 5. To prevent bolt loosening and rotation at the connection between the telescopic link 3 and the high-strength bolt 1, elastic washers 4 are preferably provided between the high-strength bolt 1 and both sides of the telescopic link 3. The telescopic link 3 should be reasonably adjusted to its initial state to ensure that the telescopic displacement is ±50mm. The link body 3.1 and the link sub-body 3.2 should have high structural strength. Preferably, the telescopic link 3 is a rectangular parallelepiped structure, the cross-section of the fitting end between the link sub-body 3.2 and the link body 3.1 is rectangular, and the link body 3.1 has a rectangular hole that mates with the link sub-body 3.2.
[0022] In this utility model, preferably, the ratio between the length a of the high-strength bolt 1 embedded in the ballastless track base plate and the length b exposed on the outside of the ballastless track base plate is 3:2; the diameter of the high-strength bolt is not less than 30mm, the lower yield strength is not less than 320MPa, and the elongation after fracture is not less than 22% of the strength requirements.
[0023] In this utility model, the threaded sleeve 2 is threadedly connected to the high-strength bolt 1. The threaded sleeve 2 needs to be fixed before the concrete is poured into the ballastless track base plate 5. The threaded sleeve 2 is made of high-performance nylon material with a tensile strength of not less than 55MPa, an elongation of not less than 70%, a bending strength of not less than 65MPa, and a bending modulus of not less than 2000MPa.
[0024] The following steps should be followed when constructing this utility model:
[0025] The length 'a' of the high-strength bolt 1 embedded in the ballastless track base plate and the exposed length 'b' were determined through theoretical calculations or finite element simulation.
[0026] The depth of the tenon groove in the ballastless track base plate and the number of tenons grooves are determined through theoretical calculations or finite element simulation.
[0027] (3) Determine the dimensions and parameters of each component of the vertical displacement limiting mechanism through theoretical calculation or finite element simulation calculation, and determine the fixed position of the threaded sleeve 2 on the ballastless track base plate 5.
[0028] (4) Fix the threaded sleeve 2 before pouring concrete on the ballastless track base plate 5.
[0029] (5) Cast the ballastless track base plate 5.
[0030] (6) Assemble the connecting rod mother body 3.1 and the connecting rod daughter body 3.2 into a telescopic connecting rod 3, and adjust the initial state of the telescopic connecting rod 3 to ensure that the telescopic displacement is ±50mm.
[0031] (7) Place the elastic washer 4 at the interface where the high-strength bolt 1 and the telescopic connecting rod 3 intersect.
[0032] (8) After connecting the telescopic link 3 to the threaded sleeve 2 on the ballastless track base plate with the high-strength bolt 1, tighten the high-strength bolt 1 to fix the telescopic link 3 on the ballastless track base plate.
[0033] The other parts in this embodiment are all existing technologies and will not be described in detail here.
Claims
1. A device for limiting the vertical and lateral movement of a ballastless track bed plate, comprising a ballastless track bed plate, characterized in that: Tenons and mortises are respectively provided at the ends of two adjacent ballastless track base plates. The two adjacent ballastless track base plates are connected by a mortise and tenon structure. A set of vertical displacement limiting mechanisms is provided on both sides of the gap between the two adjacent ballastless track base plates. The vertical displacement limiting mechanism includes a telescopic connecting rod composed of a metal connecting rod mother body and a connecting rod daughter body that are movably fitted together. Bolt holes are provided at the outer ends of the connecting rod mother body and the connecting rod daughter body. Threaded sleeves are pre-embedded on the sides of the two adjacent ballastless track base plates. The connecting rod mother body and the connecting rod daughter body are respectively connected to the threaded sleeves on the sides of the corresponding ballastless track base plates by high-strength bolts to fix the telescopic connecting rod to the sides of the ballastless track base plates.
2. The device for limiting the vertical and lateral movement of the bedplate of a ballastless track according to claim 1, characterized in that: The number of tenon and mortise structures is 3-5, and the tenon and mortise structures are symmetrically distributed about the cross-section of the ballastless track base plate.
3. The device for restricting the vertical and lateral movement of the ballastless track base plate according to claim 2, characterized in that: The mortise of the tenon structure is 25mm deep.
4. The device for limiting the vertical and lateral movement of the bedplate of a ballastless track according to claim 1 or 2 or 3, characterized in that: The telescopic connecting rod is a rectangular parallelepiped structure. The cross-section of the fitting end between the connecting rod sub-body and the connecting rod mother body is rectangular. The connecting rod mother body has a rectangular hole that fits with the connecting rod sub-body.
5. The device for limiting the vertical and lateral movement of the bedplate of a ballastless track according to claim 4, characterized in that: The ratio of the length of the high-strength bolt embedded in the ballastless track base plate to the length exposed on the outside of the ballastless track base plate is 3:2; the diameter of the high-strength bolt is not less than 30mm.
6. The device for limiting the vertical and lateral movement of the bedplate of a ballastless track according to claim 4, characterized in that: The threaded sleeve is made of nylon.
7. The device for restricting the vertical and lateral movement of the ballastless track base plate according to claim 4, characterized in that: Elastic washers are installed between the high-strength bolts and both sides of the telescopic connecting rod.