Steel rail telescopic adjuster and seamless steel rail

Abstract

The invention discloses a steel rail telescopic adjuster and a seamless steel rail. Comprising a bottom plate, a rubber cushion plate arranged on the bottom surface of the bottom plate, switch tie bolts used for fixing the bottom plate, and a bedplate arranged on the bottom plate and used for buckling and pressing a stock rail, the outer rail brace assembly is arranged on the bottom plate and used for resisting the transverse force of a stock rail, and the inner rail brace assembly is arranged on the bottom plate and used for resisting the transverse force of a switch rail. The pressing tongue comprises a first arc transition section used for avoiding the top face of a rail limb of the stock rail, an inclination extension section used for avoiding the top face of the rail limb of the stock rail, a buckling and pressing section parallel to the top face of the rail limb of the stock rail, a second arc transition section used for avoiding a rail limb sharp corner of the stock rail and an abutting face used for limiting the transverse position of the stock rail. The gap between the buckling and pressing section and the top surface of the rail limb of the stock rail is 0.5 + / -0.2 mm; the structure stability can be guaranteed, it is guaranteed that the stock rail can stretch out and draw back normally, the phenomenon that the stock rail turns outwards can be reduced, and reliability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of railway tracks, in particular to a rail expansion regulator. In addition, the present invention also relates to a seamless rail comprising the rail expansion regulator. Background Art

[0002] With the rapid development of urban rail transit, various urban large-span bridges and special bridges continue to emerge, especially in mountainous urban railways. Rail expansion joints are widely used to meet the requirements of laying seamless lines on bridges.

[0003] like Fig.10 As shown, the principle of the existing rail expansion device is that special fasteners make the point rail 200 relatively fixed while the base rail 100 expands and contracts, and the longitudinal stress is released through the expandable base rail 100. The base rail 100 expands and contracts in a curved shape outside the fixed point rail 200, so that the track gauge remains consistent except for the point hidden area of ​​the point rail. The shape of the machined surface on the inner side of the rail head of the point rail is consistent with the natural lateral static load elastic curve of the base rail 100, so that the horizontal force of the elastically bent base rail 100 in the horizontal direction on the outside of the point rail 200 remains continuous, thereby ensuring the close contact between the base rail 100 and the point rail 200. The special fasteners include a table plate 4, an outer rail support assembly 5 and an inner rail support assembly 6. The table plate 4 and the L-shaped plate 8 are welded to the base plate 1. One side of the rail limb of the basic rail 100 is buckled by the snap-fit ​​of the table plate 4, and the other side of the rail limb of the basic rail 100 is abutted by the outer rail support assembly 5 installed on the L-shaped plate 8. One side of the point rail 200 is abutted by the inner rail support assembly 6 installed on the L-shaped plate 8, and the other side of the point rail 200 is tightly attached to the basic rail 100, so that the basic rail 100 can slide smoothly relative to the point rail 200.

[0004] Due to the accumulation of various tolerances in on-site assembly, errors may occur in the size of the bayonet of the table plate 4. If the bayonet of the table plate 4 is too small, the force required for the sliding of the basic rail 100 will increase, and the basic rail 100 may not be pushed even under the designed thrust. On the one hand, the impact and vibration of the train will increase, noise pollution will increase, and passenger comfort will be affected; on the other hand, serious telescopic failures may cause the basic rail 100 to break, and the maintenance and replacement of the basic rail 100 will take a long time and be costly, affecting the normal operation of the train and even causing safety accidents; if the gap between the bayonet of the table plate and the rail limb of the basic rail is too large, the basic rail may be turned outward, which will also affect driving safety. Summary of the invention

[0005] The invention provides a rail expansion regulator and a seamless rail, so as to solve the technical problem of poor reliability of the existing rail expansion regulator.

[0006] According to one aspect of the present invention, there is provided a rail expansion and contraction adjuster, comprising a base plate, a rubber pad arranged on the bottom surface of the base plate, switch tie bolts for fixing the base plate, a table plate arranged on the base plate for buckling a basic rail, an outer rail support assembly arranged on the base plate for resisting the lateral force of the basic rail, and an inner rail support assembly arranged on the base plate for resisting the lateral force of the point rail, a pressing tongue is arranged on the table plate, and the pressing tongue comprises a first arc transition section for avoiding the top surface of the rail limb of the basic rail, an inclined extension section for avoiding the top surface of the rail limb of the basic rail, a buckling section arranged parallel to the top surface of the rail limb of the basic rail, a second arc transition section for avoiding the sharp corner of the rail limb of the basic rail, and an abutment surface for limiting the lateral position of the basic rail, and a gap between the buckling section and the top surface of the rail limb of the basic rail is 0.5±0.2mm.

[0007] Furthermore, the angle between the slope extension section and the horizontal plane is arctan1 / 3±3°.

[0008] Furthermore, the outer rail support assembly includes a first K-shaped iron arranged on the base plate, a first T-shaped bolt embedded in the first K-shaped iron, a first rail support mounted on the first T-shaped bolt and used to limit the lateral position of the basic rail, a first vertical plate arranged on the base plate and used to limit the lateral position of the first rail support, a first cover plate mounted on the first T-shaped bolt and used to limit the longitudinal position of the first rail support, and a first elastic washer mounted on the first T-shaped bolt and used to tighten the first cover plate.

[0009] Furthermore, the first rail support includes a first contact surface for abutting against the rail waist of the basic rail, a second contact surface for buckling the top surface of the rail limb of the basic rail, and a first arc surface for connecting the first contact surface and the second contact surface, the gap between the first contact surface and the rail waist of the basic rail is less than or equal to 0.5mm, the gap between the second contact surface and the top surface of the rail limb of the basic rail is 0.1-1mm, and the first arc surface is out of contact with the basic rail.

[0010] Furthermore, a groove is arranged on the second contact surface, and the length of the groove along the transverse direction is less than or equal to 47 mm.

[0011] Furthermore, the inner rail support assembly includes a second K-shaped iron arranged on the base plate, a second T-shaped bolt embedded in the second K-shaped iron, a second rail support mounted on the second T-shaped bolt and used to limit the lateral position of the point rail, a second vertical plate arranged on the base plate and used to limit the lateral position of the second rail support, a second cover plate mounted on the second T-shaped bolt and used to limit the longitudinal position of the second rail support, and a second elastic washer mounted on the second T-shaped bolt and used to tighten the second cover plate.

[0012] Furthermore, the second rail support includes a third contact surface for abutting the waist of the point rail, a fourth contact surface for buckling the top surface of the rail limb of the point rail, and a second arc surface for connecting the third contact surface and the fourth contact surface, the gap between the third contact surface and the waist of the point rail is less than 0.1mm, the gap between the fourth contact surface and the top surface of the rail limb of the point rail is less than or equal to 0.5mm, and the second arc surface is out of contact with the point rail.

[0013] Furthermore, an adjustment sheet is arranged between the first vertical plate and the first rail support and / or between the second vertical plate and the second rail support.

[0014] Furthermore, a rib plate for abutting against the first vertical plate and / or the second vertical plate is arranged on the bottom plate, and the rib plate is arranged parallel to the abutting surface.

[0015] According to another aspect of the present invention, there is also provided a seamless rail, which comprises the above-mentioned rail expansion and contraction adjuster.

[0016] The present invention has the following beneficial effects:

[0017] The rail expansion and contraction adjuster of the present invention has a bottom plate that is bolted onto the sleeper through a switch sleeper, and a rubber pad on the bottom surface of the bottom plate can reduce impact and vibration during train operation, reduce noise pollution, and improve passenger comfort; the platform plate buckles the rail limb of the basic rail through a pressing tongue, and the first arc transition section and the inclined extension section can reduce the contact area between the pressing tongue and the top surface of the rail limb used for the basic rail, while preventing assembly interference; the gap L1 between the pressing section and the top surface of the rail limb of the basic rail is 0.5±0.2mm, which can prevent the basic rail from turning outward or the basic rail from being buckled too tightly on the one hand; on the other hand, considering the accumulation of various tolerances in on-site assembly, a gap is left between the rail limb of the basic rail and the pressing tongue under the condition of unchanged track gauge, thereby reducing friction, thereby ensuring that the basic rail can be normally expanded and contracted; the second arc transition section is beneficial to preventing the platform plate from breaking at the corner position, and the rail expansion and contraction adjuster of the present invention has a stable structure and high reliability, ensuring that the basic rail can be normally expanded and contracted, and avoiding turning outward of the basic rail.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of a rail expansion and contraction adjuster according to a preferred embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of a tabletop in a preferred embodiment of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a table plate buckling basic rail according to a preferred embodiment of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a rib plate of a preferred embodiment of the present invention;

[0024] Figure 5 is a schematic structural diagram of an outer rail support assembly of a preferred embodiment of the present invention;

[0025] Figure 6 is a schematic structural diagram of a first rail support in a preferred embodiment of the present invention;

[0026] Figure 7 is a schematic structural diagram of a second rail support in a preferred embodiment of the present invention;

[0027] Figure 8 is a side view of a first K-type iron according to a preferred embodiment of the present invention;

[0028] Fig. 9 is a front view of a first K-type iron according to a preferred embodiment of the present invention;

[0029] Fig.10 It is a structural schematic diagram of an existing rail expansion and contraction adjuster.

[0030] Legend:

[0031] 100, basic rail; 101, rail limb of basic rail; 102, rail waist of basic rail; 200, point rail; 201, rail limb of point rail; 202, rail waist of point rail; 1, bottom plate; 11, rib plate; 2, rubber pad; 3, turnout sleeper bolt; 4, table plate; 41, tongue; 411, first arc transition section; 412, slope extension section; 413, buckling section; 414, second arc transition section; 415, abutment surface; 416, chamfer; 5, outer rail support assembly; 51, first K-type iron; 52, first T-type bolt ; 53. First rail support; 531. First contact surface; 532. Second contact surface; 533. First arc surface; 534. Slot; 54. First vertical plate; 55. First cover plate; 56. First elastic washer; 57. Rubber washer; 6. Inner rail support assembly; 61. Second K-shaped iron; 62. Second T-shaped bolt; 63. Second rail support; 631. Third contact surface; 632. Fourth contact surface; 633. Second arc surface; 64. Second vertical plate; 65. Second cover plate; 66. Second elastic washer; 7. Adjustment sheet. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0033] Please also read Figures 1 to 9 The rail expansion and contraction adjuster of this embodiment takes the width direction of the rail limb 101 of the basic rail as the horizontal direction and the height direction of the basic rail 100 as the vertical direction, and includes a bottom plate 1, a rubber pad 2 arranged on the bottom surface of the bottom plate 1, a turnout tie bolt 3 for fixing the bottom plate 1, a table plate 4 arranged on the bottom plate 1 for buckling the basic rail 100, an outer rail support assembly 5 arranged on the bottom plate 1 for resisting the lateral force of the basic rail 100, and an inner rail support assembly 6 arranged on the bottom plate 1 for resisting the lateral force of the point rail 200. A pressing tongue 41 is provided, which includes a first arc transition section 411 for avoiding the top surface of the rail limb 101 of the basic rail, an inclined extension section 412 for avoiding the top surface of the rail limb 101 of the basic rail, a pressing section 413 arranged parallel to the top surface of the rail limb 101 of the basic rail, a second arc transition section 414 for avoiding the sharp corner of the rail limb 101 of the basic rail and an abutment surface 415 for limiting the lateral position of the basic rail 101, and a gap L1 between the pressing section 413 and the top surface of the rail limb 101 of the basic rail is 0.5±0.2mm.

[0034] The rail expansion and contraction adjuster of this embodiment has a bottom plate 1 on the sleeper through a switch sleeper bolt 3, and a rubber pad 2 on the bottom surface of the bottom plate 1 can reduce the impact and vibration during train operation, reduce noise pollution, and improve passenger comfort; the platform 4 buckles the rail limb 100 of the basic rail through a pressing tongue 41, and the first arc transition section 411 and the slope extension section 412 can reduce the contact area between the pressing tongue 41 and the top surface of the rail limb 101 for the basic rail, while preventing assembly interference; the gap L1 between the buckling section 413 and the top surface of the rail limb of the basic rail is 0.5±0.2mm. If the gap L1 is greater than 0.7mm, the basic rail 100 is prone to rollover. The gap L1 is less than 0.3mm, and the basic rail 100 is not easy to install; by controlling the gap L1, on the one hand, the basic rail 100 can be prevented from turning outward or being pressed too tightly; on the other hand, considering the accumulation of various tolerances in on-site assembly, the rail limb 100 of the basic rail and the pressing tongue 41 have a gap under the condition of unchanged track gauge, thereby reducing friction and ensuring that the basic rail 100 can be normally extended and retracted; the second arc transition section 414 is conducive to preventing the table 4 from breaking at the corner position. The rail expansion and contraction regulator of this embodiment has a stable structure and high reliability, ensuring that the basic rail 100 can be normally extended and retracted, and preventing the basic rail 100 from turning outward. Optionally, a chamfer 416 is set at the corner between the abutment surface 415 and the bottom surface of the table 4 to prevent the corner from scratching the rail limb 101 of the basic rail during assembly.

[0035] like Figure 2 and Figure 3As shown, the distance l between the abutment surface 415 and the rail limb 101 of the basic rail is 1 to 10 mm. On the one hand, it can reduce the contact area between the rail limb 101 of the basic rail and the table 4 to prevent the expansion and contraction resistance of the basic rail 100 from being too large. On the other hand, it is easy to adjust the track gauge.

[0036] In this embodiment, the angle between the inclined extension section 412 and the horizontal plane is arctan1 / 3±3°. If the angle between the inclined extension section 412 and the horizontal plane is greater than arctan1 / 3+3°, the basic rail 100 may be turned outward. If the angle between the inclined extension section 412 and the horizontal plane is greater than arctan1 / 3-3°, the gap between the entrance of the tongue pressing member 41 and the base plate 1 will be reduced, thereby increasing the difficulty of assembling the basic rail 100.

[0037] like Figure 5 , Figure 6 , Figure 8 and Fig. 9 As shown, in this embodiment, the outer rail support assembly 5 includes a first K-shaped iron 51 arranged on the bottom plate 1, a first T-shaped bolt 52 embedded in the first K-shaped iron 51, a first rail support 53 sleeved on the first T-shaped bolt 52 and used to limit the lateral position of the basic rail 100, a first vertical plate 54 arranged on the bottom plate 1 and used to limit the lateral position of the first rail support 53, a first cover plate 55 sleeved on the first T-shaped bolt 52 and used to limit the longitudinal position of the first rail support 53, and a first elastic washer 56 sleeved on the first T-shaped bolt 52 and used to press the first cover plate 55; a dovetail groove is opened on the first K-shaped iron 51, the opening of the dovetail groove faces upward, and the bottom of the first K-shaped iron 51 is welded to the bottom plate 1 to improve the first K-shaped iron 51 and the bottom plate 1. The connection strength is that the first T-bolt 52 is inverted and the head is stuck in the dovetail groove, the first rail support 53 passes through the first T-bolt 52, and the first vertical plate 54 is welded to the bottom plate. The first vertical plate 54 abuts against the first rail support 53, thereby limiting the lateral position of the first rail support 53. The nut on the first T-bolt 52 presses the first rail support 53 through the first elastic washer 56 and the first cover plate 55, thereby limiting the longitudinal position of the first rail support 53, so that the first rail support 53 is closely attached to the basic rail 100, thereby preventing the basic rail 100 from turning outward; through the internal structure design of the first rail support 53, the buckling form of punching holes on the bottom plate 1 is eliminated, and the K-type iron buckling form is changed, which reasonably utilizes the contact space and can reduce the processing difficulty; it is conducive to the installation of the first rail support 53. Optionally, the first elastic washer 56 is a spring or a rubber washer.

[0038] like Figure 6As shown, in this embodiment, the first rail support 53 includes a first contact surface 531 for abutting against the rail waist 102 of the basic rail, a second contact surface 532 for buckling the top surface of the rail limb 101 of the basic rail, and a first arc surface 533 for connecting the first contact surface 531 and the second contact surface 532. The gap between the first contact surface 531 and the rail waist 102 of the basic rail is less than or equal to 0.5 mm, the gap between the second contact surface 532 and the top surface of the rail limb 101 of the basic rail is 0.1-1 mm, and the first arc surface 533 is out of contact with the basic rail 100; the close contact between the rail support and the rail is affected by the structural design and the process processing accuracy. , the influence of assembly errors. The manufacturing of the rail support is mainly carried out by casting or welding. Both methods have large errors. The edge position of the rail support is a difficult-to-control surface. Therefore, the edge position of the rail support is designed to be a first arc surface 533 that is out of contact with the basic rail 100, thereby reducing the contact with the basic rail 100; by controlling the gap between the first contact surface 531 and the second contact surface 532 and the basic rail 100, the contact surface between the rail limb 101 of the basic rail and the rail waist 102 of the basic rail is controlled, which can reduce friction while ensuring the supporting effect of the first rail support 53, thereby ensuring that the basic rail 100 can be normally extended and retracted.

[0039] like Figure 5 As shown, in this embodiment, the outer rail support assembly 5 includes an adjustment piece 7 for adjusting the transverse position of the first rail support 53. The adjustment piece 7 is arranged between the first vertical plate 54 and the first rail support 53. The hole on the first rail support 53 for passing the first T-bolt 52 is a waist-shaped hole. The first rail support 53 is against the first vertical plate 54 through the adjustment piece 7, thereby limiting the transverse position of the first rail support 53. The adjustment piece 7 provides a variety of thickness options, which can set a larger adjustment space in the transverse direction. By selecting adjustment pieces 7 of different thicknesses, the transverse position of the first rail support 53 is adjusted, thereby eliminating the impact of various tolerance accumulations of on-site assembly on assembly, and ensuring that the first rail support 53 is closely attached to the waist 102 of the basic rail. Optionally, a limiting groove for passing the first cover plate 55 is provided on the first vertical plate 54 and / or the adjustment piece 7 to prevent the adjustment piece 7 from slipping off.

[0040] like Figure 5 As shown, in this embodiment, the outer rail support assembly 5 includes a rubber gasket 57, which is sleeved on the first K-shaped iron 51 and arranged between the first rail support 53 and the base plate 1. The rubber gasket 57 provides a variety of thickness options. Rubber gaskets 57 of different thicknesses can be used to adjust the longitudinal position of the first rail support 53 to ensure that the first rail support 53 is in close contact with the rail leg 101 of the basic rail.

[0041] like Figure 5As shown, in this embodiment, a slot 534 is arranged on the second contact surface 532, and the length of the slot 534 along the transverse direction is less than or equal to 47 mm; the first rail support 53 is used to reduce the contact area between the second contact surface 532 and the basic rail 100 as much as possible, so as to reduce the friction between the first rail support 53 and the basic rail 100, thereby ensuring that the basic rail 100 can be normally extended and retracted; if the length of the slot 534 along the transverse direction is greater than 47 mm, it is difficult for the second contact surface 532 to effectively buckle the rail limb 101 of the basic rail, which may cause the basic rail 100 to turn inward.

[0042] like Figure 1 As shown, in this embodiment, the inner rail support assembly 6 includes a second K-shaped iron 61 arranged on the bottom plate 1, a second T-shaped bolt 62 embedded in the second K-shaped iron 61, a second rail support 63 sleeved on the second T-shaped bolt 62 and used to limit the lateral position of the point rail 200, a second vertical plate 64 arranged on the bottom plate 1 and used to limit the lateral position of the second rail support 63, a second cover plate 65 sleeved on the second T-shaped bolt 62 and used to limit the longitudinal position of the second rail support 63, and a second elastic washer 66 sleeved on the second T-shaped bolt 62 and used to press the second cover plate 65; a dovetail groove is provided on the second K-shaped iron 61, the opening of the dovetail groove faces upward, and the bottom of the second K-shaped iron 61 is welded to the bottom plate 1 to improve the connection between the second K-shaped iron 61 and the bottom plate 1 The second T-bolt 62 is inverted and the head is stuck in the dovetail groove. The second rail support 63 passes through the second T-bolt 62. The second vertical plate 64 is welded to the bottom plate 1. The second vertical plate 64 abuts against the second rail support 63, thereby limiting the lateral position of the second rail support 63. The nut on the second T-bolt 62 presses the second rail support 63 through the second elastic washer 66 and the second cover plate 65, thereby limiting the longitudinal position of the second rail support 63, so that the second rail support 63 is closely attached to the basic rail 100, thereby preventing the basic rail 100 from turning outward; through the internal structure design of the second rail support 63, the buckling form of punching holes on the bottom plate 1 is eliminated, and the buckling form of K-type iron is changed, which reasonably utilizes the contact space and can reduce the processing difficulty; it is conducive to the installation of the second rail support 63. Optionally, the second elastic washer 66 is a spring or a rubber washer.

[0043] like Figure 7As shown, in this embodiment, the second rail support 63 includes a third contact surface 631 for abutting against the waist 202 of the pointed rail, a fourth contact surface 632 for buckling the top surface of the rail limb 201 of the pointed rail, and a second arc surface 633 for connecting the third contact surface 631 and the fourth contact surface 632. The gap between the third contact surface 631 and the waist 202 of the pointed rail is less than 0.1 mm, the gap between the fourth contact surface 632 and the top surface of the rail limb 201 of the pointed rail is less than or equal to 0.5 mm, and the second arc surface 633 is out of contact with the pointed rail 200. The close contact between the rail support and the rail is affected by the structural design, process processing accuracy, and assembly error. The manufacturing of the rail support is mainly carried out by casting or welding. Both methods have large errors. The corner position of the rail support is a difficult-to-control surface. Therefore, the corner position of the rail support is designed to be the second arc surface 633 that is out of contact with the pointed rail 200. , which can reduce the difficulty of processing; the design principle of the second rail support 63 is to prevent the point rail 200 from moving, so the greater the friction between the point rail 200 and the second rail support 63, the better. Since the basic rail 100 and the point rail 200 are in close contact and can support each other, from the perspective of the structural stability of the rail expansion and contraction adjuster, the close contact between the waist 202 of the point rail and the second rail support 63 is the most important, and the buckling of the rail limb 201 of the point rail is second. Therefore, the gap between the third contact surface 631 and the waist 202 of the point rail is less than 0.1mm to make up for the reduced contact area between the second arc surface 633 and the basic rail 100, and to ensure that there is a sufficiently large static friction between the second rail support 63 and the waist 202 of the point rail, thereby preventing the point rail 200 from moving; and the gap between the fourth contact surface 632 and the top surface of the rail limb 201 of the point rail can correspondingly relax the processing accuracy to reduce the processing difficulty, thereby saving production costs.

[0044] like Figure 1 As shown, in this embodiment, the outer rail support assembly 6 includes an adjustment sheet 7 for adjusting the transverse position of the second rail support 63. The adjustment sheet 7 is arranged between the second vertical plate 64 and the second rail support 63. The hole on the second rail support 63 for passing the second T-bolt 62 is a waist-shaped hole. The second rail support 63 is pressed against the second vertical plate 64 through the adjustment sheet 7, thereby limiting the transverse position of the second rail support 63. The adjustment sheet 7 provides a variety of thickness options, which can set a larger adjustment space in the transverse direction. By selecting adjustment sheets 7 of different thicknesses, the transverse position of the second rail support 63 is adjusted, thereby eliminating the impact of various tolerance accumulations of on-site assembly on assembly, and ensuring that the second rail support 63 is closely attached to the waist 202 of the point rail. Optionally, a limiting groove for passing the second cover plate 65 is provided on the second vertical plate 64 and / or the adjustment sheet 7 to prevent the adjustment sheet 7 from slipping off.

[0045] In this embodiment, the outer rail support assembly 6 includes a rubber gasket 57, which is sleeved on the second K-shaped iron 61 and arranged between the second rail support 63 and the base plate 1. The rubber gasket 57 provides a variety of thickness options. Rubber gaskets 57 of different thicknesses can be used to adjust the longitudinal position of the second rail support 63 to ensure that the second rail support 63 is in close contact with the rail leg 201 of the point rail.

[0046] like Figure 4 As shown, in this embodiment, a rib plate 11 for abutting against the first vertical plate 54 is arranged on the left side of the bottom plate 1, and the rib plate 11 is arranged parallel to the abutment surface 415. The installation position of the first vertical plate 54 is determined by the rib plate 11 abutting against the first vertical plate 54. The rib plate 11 is arranged parallel to the abutment surface 415, so that the spacing A1 between the rib plate 11 and the abutment surface 415 in the longitudinal direction is consistent, and the tolerance D1 of the spacing A1 is consistent (tolerance is the same positive difference or the same negative difference), so as to ensure that the tongue 41 of the table 4 can be adapted to the rail limb 101 of the base rail. Optionally, the tolerance D1 is ±0.5mm. A rib plate 11 for abutting against the second vertical plate 64 is arranged on the right side of the bottom plate 1. The rib plate 11 is arranged parallel to the abutment surface 415, so that the spacing A2 between the rib plate 11 and the abutment surface 415 in the longitudinal direction is consistent, and the tolerance D2 of the spacing A2 is consistent (the tolerance is the same positive difference or the same negative difference), so as to ensure that the point rail 200 can be closely attached to the base rail 100. Optionally, the tolerance D2 is ±0.5 mm.

[0047] A seamless steel rail comprises the above-mentioned steel rail expansion adjuster.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rail expansion adjuster, characterized in that: The invention comprises a base plate (1), a rubber pad (2) arranged on the bottom surface of the base plate (1), a switch sleeper bolt (3) for fixing the base plate (1), a platform (4) arranged on the base plate (1) for buckling a base rail, an outer rail support assembly (5) arranged on the base plate (1) for resisting the lateral force of the base rail, and an inner rail support assembly (6) arranged on the base plate (1) for resisting the lateral force of the point rail. A pressing tongue (41) is arranged on the platform (4), and the pressing tongue (41) comprises a first arc transition section (411) for avoiding the top surface of the rail limb of the basic rail, an inclined extension section (412) for avoiding the top surface of the rail limb of the basic rail, a pressing section (413) arranged parallel to the top surface of the rail limb of the basic rail, a second arc transition section (414) for avoiding the sharp corner of the rail limb of the basic rail, and an abutment surface (415) for limiting the lateral position of the basic rail, and a gap between the pressing section (413) and the top surface of the rail limb of the basic rail is 0.5±0.2 mm.

2. The rail expansion adjuster according to claim 1, characterized in that: The angle between the slope extension section (412) and the horizontal plane is arctan1 / 3±3°.

3. The rail expansion adjuster according to claim 1, characterized in that: The outer rail support assembly (5) comprises a first K-shaped iron (51) arranged on the base plate (1), a first T-shaped bolt (52) embedded in the first K-shaped iron (51), a first rail support (53) sleeved on the first T-shaped bolt (52) and used to define the lateral position of the basic rail, a first vertical plate (54) arranged on the base plate (1) and used to define the lateral position of the first rail support (53), a first cover plate (55) sleeved on the first T-shaped bolt (52) and used to define the longitudinal position of the first rail support (53), and a first elastic washer (56) sleeved on the first T-shaped bolt (52) and used to press the first cover plate (55).

4. The rail expansion adjuster according to claim 3, characterized in that: The first rail support (53) comprises a first contact surface (531) for abutting against the rail waist of the basic rail, a second contact surface (532) for buckling the top surface of the rail limb of the basic rail, and a first arc surface (533) for connecting the first contact surface (531) and the second contact surface (532), the gap between the first contact surface (531) and the rail waist of the basic rail is less than or equal to 0.5 mm, the gap between the second contact surface (532) and the top surface of the rail limb of the basic rail is 0.1-1 mm, and the first arc surface (533) is out of contact with the basic rail.

5. The rail expansion adjuster according to claim 4, characterized in that: The second contact surface (532) is provided with a slot (534), and the length of the slot (534) along the transverse direction is less than or equal to 47 mm.

6. The rail expansion adjuster according to claim 4 or 5, characterized in that: The inner rail support assembly (6) comprises a second K-shaped iron (61) arranged on the base plate (1), a second T-shaped bolt (62) embedded in the second K-shaped iron (61), a second rail support (63) sleeved on the second T-shaped bolt (62) and used to limit the lateral position of the pointed rail, a second vertical plate (64) arranged on the base plate (1) and used to limit the lateral position of the second rail support (63), a second cover plate (65) sleeved on the second T-shaped bolt (62) and used to limit the longitudinal position of the second rail support (63), and a second elastic washer (66) sleeved on the second T-shaped bolt (62) and used to press the second cover plate (65).

7. The rail expansion adjuster according to claim 6, characterized in that: The second rail support (63) comprises a third contact surface (631) for abutting against the waist of the point rail, a fourth contact surface (632) for buckling the top surface of the rail limb of the point rail, and a second arc surface (633) for connecting the third contact surface (631) and the fourth contact surface (632), the gap between the third contact surface (631) and the waist of the point rail is less than 0.1 mm, the gap between the fourth contact surface (632) and the top surface of the rail limb of the point rail is less than or equal to 0.5 mm, and the second arc surface (633) is out of contact with the point rail.

8. The rail expansion adjuster according to claim 6, characterized in that: An adjustment sheet (7) is arranged between the first vertical plate (54) and the first rail support (53) and / or between the second vertical plate (64) and the second rail support (63).

9. The rail expansion adjuster according to claim 6, characterized in that: The bottom plate (1) is provided with a rib plate (11) for abutting against the first vertical plate (54) and / or the second vertical plate (64); the rib plate (11) is arranged parallel to the abutment surface (415).

10. A seamless rail, characterized in that: The invention comprises the rail expansion and contraction adjuster according to any one of claims 1 to 9.

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