Plateau opening-to-opening seamless turnout adapting to plateau climatic environment

Abstract

The utility model discloses a plateau opening-to-opening seamless turnout adapting to plateau climatic environment, which comprises a first seamless turnout and a second seamless turnout, a first straight switch rail of the first seamless turnout is connected with a second straight stock rail of the second seamless turnout through a first connecting straight rail, and a second straight switch rail of the second seamless turnout is connected with a second connecting straight rail. A first straight stock rail of the first seamless turnout is connected with a second straight switch rail of the second seamless turnout through a second connecting straight rail; two ends of the first connecting straight rail are respectively a first welding joint and a second welding joint; two ends of the second connecting straight rail are respectively a third welding joint and a fourth welding joint; the first welding joint, the second welding joint, the third welding joint and the fourth welding joint are all seamless joints; and a plurality of pad bodies for dispersing the first connecting straight rail and the second connecting straight rail to a zero stress state are arranged below the first connecting straight rail and the second connecting straight rail. Steel rail stress is released through the pad body to reduce internal stress of the steel rail, the risk that the connecting straight rail is damaged due to fatigue is reduced, and the service life of the connecting straight rail is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transportation, and more specifically to a plateau-matching seamless turnout which is adapted to the plateau climate environment. Background Art

[0002] The existing plateau railway is seamless in sections but has joints in switches, so it is of great practical significance to realize seamless cross-section plateau railway.

[0003] The existing publication number is CN117107556A, and its name is a kind of bonded plateau railway seamless turnout and seamless method. It discloses a bonded plateau railway seamless turnout, including a straight basic rail, a curved basic rail, a straight point rail, a curved point rail, a guard rail, a fixed type frog and a contact group. The curved basic rail is arranged on the outside of the straight point rail, and the curved point rail is arranged between the straight basic rail and the straight point rail. The curved basic rail and the curved point rail have the same running direction. The curved point rail line shape is the same as the straight basic rail line shape and the fixed type frog is arranged at the intersection of the frog. The fixed type frog connects the end of the curved point rail and the end of the straight point rail. The guard rail is arranged on the inner side of the working edge of the straight basic rail and the inner side of the working edge of the curved basic rail. The contact group is arranged on the rail, and the contact group is a seamless contact. The contact groups on the straight point rail, the curved point rail and the fixed type frog are frozen joints or welded joints, and the contact groups on the straight basic rail and the curved basic rail are all welded joints. The seamless turnout fully considers the structural characteristics of the turnout and takes targeted measures according to the plateau climate conditions, breaking through the traditional technical solutions that only consider the characteristics of plain areas.

[0004] However, the seamless turnout of the plateau railway only realizes the seamlessness of a single turnout. The seamlessness of a complex turnout group such as a mating turnout (composed of two groups of turnouts) that can adapt to the plateau climate environment is still a technical gap in the track.

[0005] Therefore, how to provide a plateau-compatible seamless turnout with a long service life and adaptability to the plateau climate environment to fill the technical gap in the track is an urgent problem that technical personnel in this field need to solve. Utility Model Content

[0006] In view of this, the utility model provides a plateau-matching seamless turnout with a long service life and adaptability to the plateau climate environment, so as to fill the technical gap in the track.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A plateau-matched seamless turnout adapted to plateau climate environment, comprising: a first seamless turnout and a second seamless turnout, wherein a first straight point rail of the first seamless turnout is connected to a second straight base rail of the second seamless turnout via a first connecting straight rail, and the first straight base rail of the first seamless turnout is connected to the second straight point rail of the second seamless turnout via a second connecting straight rail;

[0009] The welding positions between the two ends of the first connecting straight rail and the first straight point rail and the second straight base rail respectively have a first welding joint and a second welding joint, and the welding positions between the two ends of the second connecting straight rail and the first straight base rail and the second straight point rail respectively have a third welding joint and a fourth welding joint;

[0010] The first welding joint, the second welding joint, the third welding joint and the fourth welding joint are all seamless joints;

[0011] A plurality of pads are provided below the first connecting straight rail and the second connecting straight rail for relaxing the first connecting straight rail and the second connecting straight rail to a zero stress state.

[0012] It can be known from the above technical scheme that compared with the prior art, the utility model discloses a plateau seamless turnout that can adapt to the plateau climate environment, and adopts a first connecting straight rail and a second connecting straight rail to connect the two seamless turnouts, and the connection positions all adopt seamless joints, thereby realizing a seamless turnout that can adapt to the plateau climate; and after welding the second welding joint and the fourth welding joint, when welding the first welding joint and the third welding joint, loosen all the fasteners within the range of the first connecting straight rail and the second connecting straight rail, and insert a pad under the rail to support the first connecting straight rail and the second connecting straight rail, so that the first connecting straight rail and the second connecting straight rail are in a relaxed state, thereby releasing the stress of the first connecting straight rail and the second connecting straight rail, and then weld the first welding joint and the third welding joint at the fastening fastener. Therefore, by inserting a pad under the first connecting straight rail and the second connecting straight rail, the stress of the rail can be released to reduce the internal stress of the rail, reduce the risk of the connecting straight rail being damaged due to fatigue, and extend the service life of the connecting straight rail.

[0013] Furthermore, the pad body is a roller or a supporting pad.

[0014] The beneficial effect of adopting the above technical solution is that: the pad body is preferably a roller, which can easily roll under the track and roll out of the track, and the operation is convenient and quick.

[0015] Furthermore, the distance between two adjacent pad bodies is not less than 10m.

[0016] The beneficial effect of adopting the above technical solution is that the straight rail release effect can be ensured while reducing the amount of pad used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 The utility model provides a structural schematic diagram of a plateau-connected seamless turnout adapted to plateau climate environment.

[0019] Figure 2 This is a schematic diagram of inserting a pad after all the fasteners of the first connecting straight rail are loosened.

[0020] Figure 3 Schematic diagram of completing the welding of the first welded joint after re-tightening the fasteners for the first connecting straight rail. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-Figure 3 As shown, the embodiment of the utility model discloses a plateau matching seamless turnout adapted to the plateau climate environment, characterized in that it comprises: a first seamless turnout 100 and a second seamless turnout 200, a first straight point rail 1001 of the first seamless turnout 100 is connected with a second straight basic rail 2001 of the second seamless turnout 200 via a first connecting straight rail 300, and a first straight basic rail 1002 of the first seamless turnout 100 is connected with a second straight point rail 2002 of the second seamless turnout 200 via a second connecting straight rail 400;

[0023] The welding positions between the two ends of the first connecting straight rail 300 and the first straight point rail 1001 and the second straight base rail 2001 respectively have a first welding joint 2 and a second welding joint 1, and the welding positions between the two ends of the second connecting straight rail 400 and the first straight base rail 1002 and the second straight point rail 2002 respectively have a third welding joint 3 and a fourth welding joint 4;

[0024] The first welding joint 2, the second welding joint 1, the third welding joint 3, and the fourth welding joint 4 are all seamless joints;

[0025] A plurality of pads 500 are provided below the first connecting straight rail 300 and the second connecting straight rail 400 for relaxing the first connecting straight rail 300 and the second connecting straight rail 400 to a zero stress state, and the distance between two adjacent pads 500 is not less than 10 m.

[0026] In an embodiment, the pad body 500 may be a roller or a supporting pad.

[0027] There is a basic gap in the research on seamless welding methods and welding sequences for plateau turnouts.

[0028] For seamless welding of turnouts, mobile flash welding cannot be used in plateau areas due to power supply problems, mobile gas pressure welding has high clamping length requirements, and the number of rail parts that can be adapted is very small. Therefore, two seamless welding schemes are proposed as follows:

[0029] A. All-aluminum thermal welding seamless solution:

[0030] In order to minimize the impact of welding on the turnout structure and reduce the difficulty of construction, the welding sequence is recommended to be the overall sequence of first turning inside and then outside, first straight strand and then curved strand, such as Figure 1 The shown turnout is welded in the order of the welding joint numbers 5-7-6-8-9-11-10-12-14-13-16-15-1-4-2-3-17-18-19-20-21-22-23-24. That is, in the welding process inside the turnout, the straight strands (numbered 5, 7, 10, 12) are welded first, followed by the curved strands (numbered 6, 8, 9, 11), followed by the frog joints (numbered 13, 14, 15, 16), then the external joints (numbered 1, 2, 3, 4), and finally the eight rear turnout joints numbered 17, 18, 19, 20, 21, 22, 23 and 24.

[0031] like Figure 2 After welding the second welding joint 1 and the fourth welding joint 4, when welding the first welding joint 2 and the third welding joint 3, loosen all fasteners within the range of the first connecting straight rail 300 and the second connecting straight rail 400, and insert a pad 500 under the rail to support the first connecting straight rail 300 and the second connecting straight rail 400, so that the first connecting straight rail 300 and the second connecting straight rail 400 are in a relaxed state, thereby relieving the stress of the first connecting straight rail 300 and the second connecting straight rail 400. Then, as shown in FIG. Figure 3 , then tighten the fasteners and weld the first welding joint 2 and the third welding joint 3.

[0032] B. Partial freezing + partial thermite welding seamless solution:

[0033] right Figure 1For the turnout shown, it is recommended to use frozen joints for the welded joints 18, 19, 22, 23, 13, 14, 15, 16, 6, 7, 10, and 11 on the point rail and the frog, and the welded joints of other rail parts are seamless. However, the stability and construction quality of frozen joints are difficult to control, and the service life is short. The advantage is that the rails do not need to be sawed during repair, and they can be repaired in situ. Therefore, the frozen joints are set in the frog area with a similarly short service life. According to the requirements of the track circuit, they can be set in the straight strand or the side strand. For the same welding rail matching conditions, the rail extension can be designed only according to the insulating joint set on the side strand.

[0034] In addition, in order to adapt to the complex form of welded turnouts, the turnout structure is lengthened to increase the failure expectation caused by welding, thereby improving the welding success rate of plateau turnouts. The basic rails at joints 1-4 are lengthened by 600mm, and the joint ends at turnouts 6, 8, 9, and 11 are lengthened by 600mm. Other rail parts are matched according to the designed length and the length is adjusted by sawing according to actual needs. If welding fails, the rails can be sawed and re-welded, so there is no need to replace the rails, which can significantly improve the welding success rate.

[0035] The use of this new type can realize the seamlessness of complex turnout groups in plateaus, such as mating turnouts, reduce the wheel-rail impact level, extend the service life of rails, and reduce the maintenance workload of turnouts in plateaus.

[0036] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plateau-matched seamless turnout adapted to the plateau climate environment, characterized in that: include: A first seamless turnout (100) and a second seamless turnout (200), wherein a first straight point rail (1001) of the first seamless turnout (100) and a second straight base rail (2001) of the second seamless turnout (200) are connected via a first connecting straight rail (300), and a first straight base rail (1002) of the first seamless turnout (100) and a second straight point rail (2002) of the second seamless turnout (200) are connected via a second connecting straight rail (400); The welding positions between the two ends of the first connecting straight rail (300) and the first straight point rail (1001) and the second straight base rail (2001) respectively have a first welding joint (2) and a second welding joint (1), and the welding positions between the two ends of the second connecting straight rail (400) and the first straight base rail (1002) and the second straight point rail (2002) respectively have a third welding joint (3) and a fourth welding joint (4); The first weld joint (2), the second weld joint (1), the third weld joint (3), and the fourth weld joint (4) are all seamless joints; A plurality of pads (500) are provided below the first connecting straight rail (300) and the second connecting straight rail (400) for allowing the first connecting straight rail (300) and the second connecting straight rail (400) to relax to a zero stress state.

2. The plateau-matching seamless turnout adapted to the plateau climate environment according to claim 1 is characterized in that: The pad body (500) is a roller or a supporting pad.

3. A plateau-connected seamless turnout adapted to plateau climate environment according to claim 1 or 2, characterized in that: The distance between two adjacent pad bodies (500) is not less than 10m.

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