A locally embedded withdrawal frog rail

Abstract

The application relates to a locally embedded withdrawal fork rail, which comprises a connecting part for connecting with a wing rail and a pressure bearing part fixedly connected with the connecting part, the pressure bearing part is provided with a mounting groove at a distance of 20-50 mm from the own sharp corner, both sides of the connecting part in the width direction are provided with embedding grooves, the embedding grooves are communicated with the mounting groove to form a mounting cavity, and the part of the connecting part between the two embedding grooves is provided as a joint core; the locally embedded withdrawal fork rail further comprises an inlay block, the inlay block comprises a connecting block and two side limbs, the two side limbs are arranged at intervals and are fixedly connected to the same end face of the connecting block, and the side limbs and the connecting block jointly form a groove; the connecting block is embedded into the mounting groove, the side limbs are embedded into the embedding grooves, the joint core is embedded into the groove and exists a spacing between the joint core and the groove bottom, the inlay block is combined with the inner wall of the mounting cavity and connected with the joint core, and then the inlay block and the inner wall of the mounting cavity jointly form a closed air pressure chamber above the joint core. The service life of the easily damaged part of the rail is improved, and the working amount of machining after overall forging is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of railway turnout technology, and particularly relates to a locally embedded switch rail. BACKGROUND

[0002] The turnout refers to a device for making a wheel cross from one rail to another, which includes a rail, a wing rail and a connecting part. The switch rail bears the frequent rolling of the wheel in the process of guiding the railway train to branch and turn, and thus the rail is prone to cracks, collapse and peeling off between the sections 20-50mm away from the tip angle thereof.

[0003] In order to improve the service life of the rail, the patent CN100484701C forging (rolling) production method of high manganese steel turnout rail discloses a method for producing high manganese steel rail by forging or rolling, which can significantly reduce the defects such as porosity, micro-cracks, shrinkage, coarse inclusions and composition segregation of cast high manganese steel.

[0004] However, the current high manganese steel turnout industry basically adopts the method of overall forging and then machining for manufacturing, which has the problems of high difficulty, large processing quantity, long production cycle and high manufacturing cost, and is not conducive to batch production. SUMMARY

[0005] In order to improve the service life of the rail and facilitate production and manufacturing, the present application provides a locally embedded switch rail.

[0006] The locally embedded switch rail provided by the present application adopts the following technical scheme:

[0007] The locally embedded switch rail comprises a connecting part for connecting with the wing rail and a pressure bearing part fixedly connected to the connecting part, the pressure bearing part is provided with an installation groove for dividing the pressure bearing part into two sections at a distance of 20-50mm away from the tip angle thereof, both sides of the connecting part in the width direction are provided with an embedding groove, the embedding groove is communicated with the installation groove to form an installation cavity, and the part of the connecting part between the two embedding grooves is provided as a core joint.

[0008] The locally embedded switch rail further comprises an inlay block, the inlay block comprises a connecting block and two side limbs, the two side limbs are spaced apart and fixedly connected to the same end face of the connecting block, and the side limbs and the connecting block jointly form a groove; the connecting block is embedded in the installation groove, the side limbs are embedded in the embedding grooves, the core joint is embedded in the groove and has a spacing between the core joint and the groove bottom, the inlay block is connected with the core joint by being attached to the inner wall of the installation cavity, and thus the inlay block and the inner wall of the installation cavity jointly form a closed gas pressure chamber above the core joint.

[0009] By adopting the technical scheme, the 20-50mm part of the center rail which is easy to be damaged is forged by high manganese steel, and then the forged insert is embedded into the installation cavity. The work load of machining after overall forging is reduced, and the service life of the part of the center rail which is easy to be damaged is improved. Further, the insert and the inner wall of the installation cavity form a closed air pressure chamber, heat expansion of the closed air pressure chamber occurs through heat conduction, and then a reaction force is generated, which can relieve part of the wheel rolling impact force, avoid stress concentration as much as possible, and improve the service life.

[0010] Preferably, the side limbs are connected and fixed to the core by bolts and nuts.

[0011] By adopting the technical scheme, the insert can be replaced flexibly according to the service life and specific use, which is convenient for maintenance, improves the replacement efficiency, and reduces the maintenance cost of the center rail.

[0012] Preferably, the horizontal straightness of the fitting surface between the side limbs and the slot wall is between ±0.2mm.

[0013] By adopting the technical scheme, the fitting precision between the insert and the inner wall of the installation cavity is ensured.

[0014] Preferably, the width of the insert along the length direction of the connecting part gradually decreases as it approaches the road surface, and the inner wall of the installation cavity is inclinedly arranged along the length direction of the connecting part and cooperates with the insert.

[0015] By adopting the technical scheme, when the wheel rolls on the insert, the inner wall of the installation cavity plays a pressure-bearing role on the insert, so that the insert is not easy to be deformed and damaged, the service life of the center rail is improved, and the maintenance frequency is reduced.

[0016] Preferably, the inclination angle of the inclined inner wall of the installation cavity is between 30-60°.

[0017] By adopting the technical scheme, the reasonable angle of the inclination angle of the inner wall of the installation cavity is further set.

[0018] Preferably, a lubricating layer is arranged between the insert and the inner wall of the installation cavity.

[0019] By adopting the technical scheme, the lubricating layer is formed by smearing grease between the insert and the inner wall of the installation cavity, which plays a sealing and rust-proof role on the fitting surface between the insert and the inner wall of the installation cavity, and improves the service life.

[0020] Preferably, the groove walls are transitioned by arcs.

[0021] By adopting the technical scheme, since the insert has a small volume, the insert is integrally formed in the actual production process, and the mechanical strength of the corner part of the side limbs and the connecting block is improved by setting the groove walls as arc transition.

[0022] Preferably, the width of the core gradually decreases away from the ground along the cross section perpendicular to the length direction of the connecting part, and the groove wall is adapted to the outer surface of the core.

[0023] By adopting the above technical scheme, the narrow-top-wide-bottom structure of the core can further bear pressure on the insert, reduce the probability of deformation loss of the side limb, and prolong the service life.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. The 20-50mm part of the heart rail which is prone to damage is forged with high manganese steel alone, and the forged insert is embedded in the installation cavity. This reduces the workload of machining after overall forging, and at the same time, the service life of the part of the heart rail which is prone to damage is improved. Further, the insert and the inner wall of the installation cavity form a closed air chamber, and thermal expansion of the closed air chamber occurs through heat conduction to generate a counteracting force, which can relieve part of the wheel rolling impact force, avoid stress concentration as much as possible, and improve the service life.

[0026] 2. The insert can be replaced flexibly according to the service life and specific use of the insert, which is convenient for maintenance, improves the replacement efficiency, and reduces the maintenance cost of the heart rail.

[0027] 3. When the wheel rolls on the insert, the inner wall of the installation cavity bears pressure on the insert, so that the insert is not easy to deform and damage, the service life of the heart rail is improved, and the maintenance frequency is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0029] Figure 2 is a schematic diagram of the connecting part and the pressure-bearing part in the embodiment of the present application.

[0030] Figure 3 is a schematic diagram of the structure of the insert in the embodiment of the present application.

[0031] Figure 4 is a top view of the overall structure of the embodiment of the present application.

[0032] Figure 5 is Figure 1 is a sectional view of the profile line A-A in the embodiment (i.e. the sectional view at a distance of 20mm from the sharp corner of the pressure-bearing part).

[0033] Figure 6 is Figure 4 is a sectional view of the profile line B-B.

[0034] Explanation of reference signs: 1, connecting part; 11, embedding groove; 12, core; 2, pressure bearing part; 3, inlay; 31, connecting block; 32, side limb; 33, recess; 4, mounting groove; 5, closed air pressure chamber. DETAILED DESCRIPTION

[0035] The following will be described in detail in combination with the accompanying Figures 1-6 The present application is further described in detail.

[0036] Referring to Figure 1 , the embodiment of the present application discloses a locally embedded withdrawal fork rail, which comprises a connecting part 1 for screwing with a wing rail, a pressure bearing part 2 fixedly connected to the connecting part 1, and an inlay 3.

[0037] Referring to Figure 2 , the pressure bearing part 2 is provided with a mounting groove 4 which divides the pressure bearing part 2 into two sections, and the mounting groove 4 is respectively 20 mm and 50 mm away from the sharp corners of the pressure bearing part 2 at the beginning and the end.

[0038] Both sides of the connecting part 1 in the width direction are provided with embedding grooves 11, and the embedding grooves 11 are communicated with the mounting groove 4 to form a mounting cavity. The part of the connecting part 1 between the two embedding grooves 11 is provided as a core 12.

[0039] Referring to Figure 3 , the inlay 3 comprises a connecting block 31 and two side limbs 32, the two side limbs 32 are spaced apart and are fixedly connected to the same end face of the connecting block 31, and the side limb 32 and the connecting block 31 jointly form a recess 33. In this embodiment, the inlay 3 is made of forged high manganese steel.

[0040] Referring to Figure 2 and Figure 3 , the connecting block 31 is embedded in the mounting groove 4, the side limb 32 is embedded in the embedding groove 11, and the core 12 is further embedded in the recess 33 and there is a spacing between the core 12 and the bottom of the recess 33.

[0041] Referring to Figure 4 and Figure 5 , the inlay 3 is attached to the inner wall of the mounting cavity, and the side limb 32 is connected to the core 12 by bolts and nuts and is fixed. Then, lubricating oil is applied between the inlay 3 and the inner wall of the mounting cavity to form a lubricating layer, which plays a role in lubrication and rust prevention.

[0042] Referring to Figure 6 , the inlay 3 and the inner wall of the mounting cavity jointly form a closed air pressure chamber 5 above the core 12, and the closed air pressure chamber 5 expands by heat conduction, thereby generating a counteracting force, which has the effect of reducing the impact force of the railway train wheel rolling.

[0043] Referring to Figure 1The width of the insert 3 along the length direction of the connecting part 1 gradually decreases as approaching the road surface, the inner wall of the mounting cavity along the length direction of the connecting part 1 is inclinedly arranged and cooperates with the insert 3, and the inclination angle of the inclined inner wall of the mounting cavity is between 30-60°. The horizontal straightness of the cooperation surface between the side limb 32 and the groove wall of the embedding groove 11 is between ±0.2mm.

[0044] With reference to Figure 6 The width of the connecting core 12 along the length direction of the connecting part 1 gradually decreases as approaching the ground, the groove wall of the recess 33 is adapted to the outer surface of the connecting core 12, and the groove wall of the recess 33 is transitioned by an arc.

[0045] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A locally embedded withdrawal frog, comprising a connection part (1) for connection with a wing rail and a pressure part (2) fixedly connected to the connection part (1), characterized in that: The pressure bearing part (2) is provided with a mounting groove (4) between 20-50mm from the sharp corner of itself, which divides the pressure bearing part (2) into two sections, the connecting part (1) is provided with an embedding groove (11) on both sides in the width direction, the embedding groove (11) is communicated with the mounting groove (4) to form a mounting cavity, the part of the connecting part (1) between the two embedding grooves (11) is provided as a core joint (12); It also includes an inlay block (3), the inlay block (3) includes a connecting block (31) and two side limbs (32), the two side limbs (32) are spaced apart and fixedly connected to the same end face of the connecting block (31), the side limbs (32) and the connecting block (31) form a groove (33); the connecting block (31) is embedded in the mounting groove (4), the side limbs (32) are embedded in the embedding groove (11), the core joint (12) is embedded in the groove (33) and there is a distance between the groove (33) and the groove bottom, the inlay block (3) is connected with the core joint (12) and the inner wall of the mounting cavity, and then the inlay block (3) and the inner wall of the mounting cavity form a closed air pressure chamber (5) above the core joint (12).

2. A locally embedded turnout rail according to claim 1, characterized in that: The side limbs (32) are connected and fixed with the core joint (12) through bolts and nuts.

3. A locally embedded turnout rail according to claim 1, characterized in that: The horizontal straightness of the matching surface between the side limbs (32) and the groove wall of the embedding groove (11) is between ±0.2mm.

4. A locally embedded turnout rail according to claim 1, characterized in that: The width of the inlay block (3) along the length direction of the connecting part (1) gradually decreases as it approaches the road surface, and the inner wall of the mounting cavity along the length direction of the connecting part (1) is inclined and matched with the inlay block (3).

5. A locally embedded turnout rail according to claim 4, characterized in that: The inclination angle of the inclined inner wall of the mounting cavity is between 30-60°.

6. A locally embedded turnout rail according to claim 1, characterized in that: A lubricating layer is provided between the inlay block (3) and the inner wall of the mounting cavity.

7. A locally embedded turnout rail according to claim 1, characterized in that: The groove wall of the groove (33) is transitioned by an arc.

8. A locally embedded turnout rail according to claim 1, characterized in that: The width of the core joint (12) gradually decreases as it moves away from the ground, perpendicular to the length direction of the connecting part (1), the groove wall of the groove (33) is adapted to the outer surface of the core joint (12).

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