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CN-122013606-A - Combined supporting rail piece for turnout wheel load switching area

CN122013606ACN 122013606 ACN122013606 ACN 122013606ACN-122013606-A

Abstract

The invention discloses a combined supporting rail piece for a turnout wheel load conversion area, which comprises a fixed rail, a movable rail and a supporting frame, wherein the supporting frame is rigidly combined with the fixed rail, the supporting frame is longitudinally arranged along the fixed rail to form a longitudinally continuous sliding bearing surface for supporting the rail bottom of the movable rail, a limit groove is formed on the sliding bearing surface by the side edge of the supporting frame, the non-working edge of the rail bottom of the movable rail is embedded into the limit groove, a preset gap d 1 is formed between the rail bottom of the non-working edge of the movable rail and the inner wall of the limit groove when the movable rail is in a normal state, a lifting gap d 2 is formed between the rail bottom of the movable rail and the sliding bearing surface when the movable rail is lifted, and the upper surface of the rail bottom of the non-working edge of the movable rail is contacted with the inner wall of the limit groove to form rigid limit. The invention can ensure the precise fit between the movable rail and the fixed rail to be maintained stably for a long time, and realizes the continuous and controllable constraint of the upward displacement of the movable rail through the integrated supporting frame.

Inventors

  • GE JING
  • WANG PU
  • WANG MENG
  • WANG SHUGUO
  • SI DAOLIN
  • YI QIANG
  • ZHAO ZHENHUA
  • WANG ZHONGYUAN
  • MA SIYUAN

Assignees

  • 中国铁道科学研究院集团有限公司铁道建筑研究所
  • 中国铁道科学研究院集团有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. A combined support rail for a switch wheel load transfer area, characterized by comprising a fixed rail, a movable rail and a support frame, said support frame (7) being rigidly coupled to said fixed rail; The supporting frame (7) is arranged along the longitudinal direction of the fixed rail, and forms a longitudinally continuous sliding bearing surface on the supporting frame for supporting the rail bottom of the movable rail; the side edge of the supporting frame (7) is protruded outwards near the bottom surface, a limit groove (9) is formed on the sliding bearing surface, and one side of the non-working edge of the rail bottom of the movable rail is embedded into the limit groove (9); When the movable rail is in a normal state, a preset gap d 1 is formed between the rail bottom of the non-working side of the movable rail and the inner wall of the limit groove (9); When the movable rail is lifted, a lifting gap d 2 is formed between the rail bottom of the movable rail and the sliding bearing surface, the upper surface of the rail bottom of the non-working side of the movable rail is contacted with the inner wall of the limit groove (9) to form rigid limit, and the preset gap d 1 is disappeared.
  2. 2. The modular support rail for a switch wheel load transfer section of claim 1, wherein, The fixed rail comprises a stock rail (1) and wing rails (4); The movable rail comprises a point rail (2) and a core rail (5).
  3. 3. The modular support rail for a switch wheel load transfer section of claim 2, wherein, The stock rail (1) is arranged along the main line direction of the rail and is used for bearing train wheel pairs; The wing rails (4) are arranged on two sides of the point rail (5) and form a supporting interface of a turnout wheel load switching area together with the point rail (5); the support frame (7) is connected to the web or rail base of the stock rail (1) and the wing rail (4), respectively.
  4. 4. The modular support rail for a switch wheel load transfer section of claim 2, wherein, A rim guiding surface is formed between the switch rail (2) and the stock rail (1), and the switch rail is slidingly converted in a transverse range; The center rail (5) is arranged in the center area of the turnout and is used for forming a continuous rim transition channel with the wing rail (4); and a sliding bearing surface and a limiting groove (9) which correspond to each other are formed between the supporting frame (7) and the point rail (2) and between the supporting frame and the point rail (5).
  5. 5. The modular support rail for a switch wheel load transfer section of claim 4, -A rigid connection is formed between the support frame (7) and the web or rail bottom of the stock rail (1) and of the wing rail (4); And a sealing gasket or an antifouling gasket is arranged at the rigid connection part.
  6. 6. The modular support rail for a switch wheel load transfer section of claim 1, wherein, The supporting frame (7) is an arc profile or a straight line profile on the transverse section of the rail; The extension of the support frame (7) in the transverse section of the rail covers the rail bottom contact area of the movable rail in the transverse travel range.
  7. 7. The modular support rail for a switch wheel load transfer section of claim 1, wherein, And the upper inner wall and/or the bottom of the limit groove (9) is/are provided with a wear-resistant lining layer.
  8. 8. The modular support rail for a switch wheel load transfer section of claim 1, wherein, The supporting frame (7) is reserved with an embedded fine tuning piece at the joint of the supporting frame (7) and the fixed rail, and the embedded fine tuning piece is used for fine tuning the elevation and the transverse position of the supporting frame (7); the embedded fine tuning piece comprises an adjusting gasket and a height adjusting bolt.
  9. 9. The modular support rail for a switch wheel load transfer section of claim 1, wherein, The supporting frames (7) are longitudinally distributed into a plurality of sections of modularized components, and the adjacent supporting frames (7) are connected through fixed connecting pieces; the fixed connecting piece comprises a butt bolt, a locating pin and a sealing gasket; drainage channels are arranged at the joints between the adjacent supporting frames (7).
  10. 10. The modular support rail for a switch wheel load transfer section of claim 1, wherein, And an avoidance port is arranged at the adjacent part of the supporting frame (7) and the movable part of the turnout wheel load conversion area.

Description

Combined supporting rail piece for turnout wheel load switching area Technical Field The invention relates to the technical field of railway devices, in particular to a combined supporting rail piece for a turnout wheel load switching area. Background The turnout wheel load switching area is a key weak link in a railway line, and the stability of an upper track panel structure of the turnout wheel load switching area is important for the safe and stable crossing of a train. At present, the problem of supporting movable rail members (such as switch rails and point rails) and fixed rails (such as stock rails and wing rails) in a switch transition area is particularly remarkable. The existing mainstream technical solution is to place the support of all rail members of the area completely above the fastening system, which means that the support state between the point rail and the stock rail, between the point rail and the wing rail is directly limited by the performance of the fastening system. The prior art relies on slide plates and the like for support and coupling, as shown in figures 1 and 2, the point rail being coupled to the stock rail by the slide plate and the point rail being coupled to the wing rail by the slide plate. The core problem with this design is that the stiffness uniformity and reliability of the overall support structure is highly dependent on the underlying pad and the like. In the long-term use and maintenance process on site, the fastener system is extremely easy to generate common diseases such as deformation of a backing plate, support failure and the like, so that the support state of the movable rail is changed. This deterioration of the supporting condition directly causes the geometrical cooperation between the point rail, the point rail and the corresponding fixed rail to deviate from the design values, making the geometrical position of the switch difficult to maintain. The turnout has the advantages that the service performance of the turnout is reduced, the conversion resistance is increased, the track relationship is deteriorated, the service life of the turnout is finally shortened, the turnout must be compensated by more frequent and standard maintenance, and the operation cost of the whole life cycle is obviously increased. Therefore, how to realize independent, stable and uniform support of the rail members of the switch switching area is a technical problem to be solved currently. Currently, the main technical ideas for improving the supporting state are mainly developed around two aspects of enhancing the transverse stability and optimizing the vertical elastic support, and can be specifically summarized into the following categories: (1) An elastic pad under the pillow. This solution focuses on improving the vertical support, cushioning the track impact by using elastic pads at different levels, damping the vibration and noise, and adjusting the support stiffness. The sleeper lower backing plate is arranged between the concrete sleeper and the ballast bed, for example, the multilayer backing plate adopts different materials and structural designs of an upper layer and a lower layer, the static rigidity problem is solved on the upper layer, and the groove design of the lower layer is used for adapting to irregular railway ballasts. Also, the spring system is formed by double elastic components, and the force conduction and sinking conditions are optimized through a pre-stressing device and different stiffness ratios. (2) Bridge structures with multiple fastener systems. This solution focuses on homogenizing the wheel rail load by means of a rigid platform spanning multiple sleepers, suppressing individual fulcrum softening and uneven settling, thus ensuring a stable geometry of the critical rail elements (such as the point rail and the point rail). Typically a large steel or cast steel piece, i.e. bridge deck or monoblock deck, of sufficient length to cover a plurality of ties in the transition area, e.g. 3 to 5 tie switches corresponding to the point rail heel end or the point rail transition area. Although the prior art solutions described above have achieved a certain effect in improving the supporting conditions, they all follow a common basic technical premise of having all rail elements of the switch area, including the fixed stock rail, the wing rail and the movable point rail, their supporting ultimately depend entirely on the switch tie directly thereunder and its basic conditions. The basic technical problem existing in the prior art is that the supporting reference of the movable rail piece (including the switch rail and the core rail) and the supporting reference of the fixed rail piece (including the stock rail and the wing rail) are mutually coupled and depend on an unstable switch sleeper foundation together, so that the precise dynamic matching relationship between the two is difficult to maintain stably for a long time under a complex actual working