Forged alloy steel combined frog point rail and frog heel rail matching structure

Abstract

The utility model provides a forged alloy steel combined frog point rail and frog heel rail matching structure which comprises a point rail and frog heel rails, the point rail is arranged between the two frog heel rails, the point rail comprises a left side and a right side, the left side of the point rail is provided with a first edge, a second edge, a third edge, a fourth edge and a fifth edge from top to bottom, and the right side of the point rail is provided with a sixth edge, a seventh edge, an eighth edge, a ninth edge and a tenth edge from top to bottom; the included angle between the second side and the third side of the left side of the point rail is an obtuse angle, the included angle between the third side and the fourth side is an obtuse angle, the included angle between the seventh side and the eighth side of the right side of the point rail is an obtuse angle, and the included angle between the eighth side and the ninth side is an obtuse angle; an outward protruding area defined by the second edge, the third edge, the fourth edge, the seventh edge, the eighth edge and the ninth edge of the point rail is a point rail waist; a fork heel rail waist cavity is formed in the region part, corresponding to the point rail waist, of the fork heel rail; and the fork heel rail waist cavity is tightly matched with the point rail waist. The matching area of the point rail and the frog heel rail is increased, stress concentration is reduced, frog performance is improved, and safety and reliability of railway transportation are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway turnout technical field especially relates to a forged alloy steel combined frog crossing rail, fork rail cooperation structure. BACKGROUND

[0002] In the railway track system, the frog is one of the key components. The connection stability of the crossing rail and the frog rail is crucial to the performance and service life of the whole frog. Referring to Figure 1 The traditional crossing rail and frog rail cooperation mode has the problems of small cooperation surface and insufficient connection strength. Under the long-term action of train load, connection loosening, deformation and even connection failure may occur, affecting the safety and efficiency of railway transportation. Therefore, it is necessary to develop a new crossing rail and frog rail cooperation mode to improve the connection strength and overall performance. SUMMARY

[0003] The utility model discloses a forged alloy steel combined frog crossing rail, frog rail cooperation structure, the upper and lower cooperation surface of the rail waist part of crossing rail is processed into the inclined surface of specific slope, the length of the inclined surface is determined according to the overall size of crossing rail and actual use demand, the cooperation area of crossing rail and frog rail is increased significantly, to ensure the fit degree when cooperating with frog rail, can more evenly disperse the force generated when train running, reduces local stress concentration. In order to realize the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0004] A forged alloy steel combined frog crossing rail, frog rail cooperation structure, including crossing rail, frog rail, crossing rail is between two frog rails, crossing rail includes left side and right side, the first edge, second edge, third edge, fourth edge, fifth edge have from top to bottom in crossing rail left side, the sixth edge, seventh edge, eighth edge, ninth edge, tenth edge have from top to bottom in crossing rail right side;

[0005] The included angle of the second edge and the third edge of the left side of the crossing rail is obtuse, the included angle of the third edge and the fourth edge is obtuse, the included angle of the seventh edge and the eighth edge of the right side of the crossing rail is obtuse, and the included angle of the eighth edge and the ninth edge is obtuse;

[0006] The outward convex area surrounded by the second edge, the third edge, the fourth edge, the seventh edge, the eighth edge and the ninth edge of the crossing rail is the rail waist of the crossing rail;

[0007] The corresponding area part of the frog rail and the rail waist of the crossing rail is the rail waist cavity of the frog rail;

[0008] The rail waist cavity of the frog rail and the rail waist of the crossing rail are closely matched.

[0009] Further, the fork rail rail waist type cavity is closely matched with the rail waist of the heart rail, the second edge, the fourth edge, the seventh edge and the ninth edge of the heart rail are straight edges; the second edge and the third edge of the heart rail are connected by a round corner, the third edge and the fourth edge of the heart rail are connected by a round corner; the seventh edge and the eighth edge of the heart rail are connected by a round corner, and the eighth edge and the ninth edge of the heart rail are connected by a round corner; the round corner radius of the fork rail rail waist type cavity corresponding to the junction of the second edge and the third edge of the heart rail is smaller than the round corner radius of the corresponding part of the heart rail, the round corner radius of the fork rail rail waist type cavity corresponding to the junction of the third edge and the fourth edge of the heart rail is smaller than the round corner radius of the corresponding part of the heart rail; the round corner radius of the fork rail rail waist type cavity corresponding to the junction of the seventh edge and the eighth edge of the heart rail is smaller than the round corner radius of the corresponding part of the heart rail; and the round corner radius of the fork rail rail waist type cavity corresponding to the junction of the eighth edge and the ninth edge of the heart rail is smaller than the round corner radius of the corresponding part of the heart rail.

[0010] Further, the slope of the second edge and the fourth edge of the heart rail is 1:3, and the slope of the seventh edge and the ninth edge of the heart rail is 1:3.

[0011] Further, the slope of the second edge and the fourth edge of the heart rail is 1:4, and the slope of the seventh edge and the ninth edge of the heart rail is 1:4.

[0012] Further, the left and right sides of the heart rail are center-symmetric.

[0013] Further, the third edge and the eighth edge of the heart rail are gap-fitted with the corresponding area of the fork rail rail waist type cavity.

[0014] Further, the round corner radius R a of the junction of the second edge and the third edge of the heart rail is 0.5-5mm, and the round corner radius R b of the junction of the third edge and the fourth edge of the heart rail is 0.5-5mm.

[0015] Further, the round corner radius R c of the junction of the seventh edge and the eighth edge of the heart rail is 0.5-5mm, and the round corner radius R d of the junction of the eighth edge and the ninth edge of the heart rail is 0.5-5mm.

[0016] Further, the heart rail and the fork rail are connected by bolts, and the heart rail and the fork rail are provided with holes through which the connecting bolts pass.

[0017] The beneficial effects of the utility model are:

[0018] 1. Increase the matching surface: through the round corner design of the matching edge of the heart rail and the fork rail and the 1:4 or 1:3 slope design between the matching surfaces of the heart rail and the fork rail, the matching area of the heart rail and the fork rail is significantly increased, the matching area can be improved compared with the traditional matching mode, so that the force generated during train operation can be more evenly dispersed, and local stress concentration is reduced.

[0019] 2. Improve the connection strength: the larger matching surface structure makes the connection between the center rail and the frog rail more firm, and the test shows that the connection strength can be increased by about 1.6 times compared with the traditional way, effectively reducing the probability of loosening, deformation and other failures at the connection part, prolonging the service life of the frog.

[0020] 3. Improve the performance of the frog: stable connection of the center rail and the frog rail helps to improve the overall performance of the entire forged alloy steel center rail combined frog, reduce the maintenance and replacement frequency, reduce the railway operation cost, and improve the safety and reliability of railway transportation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a cross-sectional schematic view of the traditional center rail and frog rail matching structure;

[0022] Figure 2 It is a cross-sectional schematic view of the center rail and frog rail matching structure of the utility model;

[0023] Figure 3 It is a three-dimensional schematic view of the center rail and frog rail matching structure of the utility model.

[0024] Among them:

[0025] 1 - center rail 11 - first side 12 - second side 13 - third side

[0026] 14 - fourth side 15 - fifth side 16 - sixth side 17 - seventh side

[0027] 18 - eighth side 19 - ninth side 110 - tenth side

[0028] 2 - frog rail

[0029] R a - Fillet radius at the junction of the second side and the third side

[0030] R b - Fillet radius at the junction of the third side and the fourth side

[0031] R c - Fillet radius at the junction of the seventh side and the eighth side

[0032] R d - Fillet radius at the junction of the eighth side and the ninth side. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the forged alloy steel combined frog center rail and frog rail matching structure of the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model and are not used to limit the utility model.

[0034] Reference Figure 1 Traditional methods of connecting the frog rail and fork rail result in a short bevel surface and large radii of 12mm and 25mm at the mating point. This leads to insufficient connection strength and other problems, making the connection prone to loosening, deformation, or even failure under long-term train loads, thus affecting the safety and efficiency of railway transportation. Therefore, it is necessary to develop a new frog rail and fork rail connection method to improve its connection strength and overall performance.

[0035] This utility model refers to Figure 2 and Figure 3 As shown, a forged alloy steel composite frog center rail and fork follower rail mating structure includes a center rail 1 and a fork follower rail 2. The center rail 1 is located between the two fork follower rails 2. The center rail 1 includes a left side and a right side. The left side of the center rail 1 has a first side 11, a second side 12, a third side 13, a fourth side 14, and a fifth side 15 from top to bottom. The right side of the center rail 1 has a sixth side 16, a seventh side 17, an eighth side 18, a ninth side 19, and a tenth side 110 from top to bottom.

[0036] The angle between the second side 12 and the third side 13 on the left side of the center track 1 is an obtuse angle, the angle between the third side 13 and the fourth side 14 is an obtuse angle, the angle between the seventh side 17 and the eighth side 18 on the right side of the center track 1 is an obtuse angle, and the angle between the eighth side 18 and the ninth side 19 is an obtuse angle.

[0037] The outward-protruding area enclosed by the second side 12, the third side 13, the fourth side 14, the seventh side 17, the eighth side 18, and the ninth side 19 of the center rail 1 is the waist of the center rail 1;

[0038] The area corresponding to the waist of the fork rail 2 and the center rail 1 is the waist cavity of the fork rail.

[0039] The fork and rail waist cavity fit tightly with the core rail 1 rail waist.

[0040] from Figure 2 As can be seen, the thickness of the third side 13 and the eighth side 18 of the core rail 1 is much greater than the thickness between the first side 11 and the sixth side 16 of the core rail 1. That is, the two sides of the middle part of the core rail 1 bulge outward, and correspondingly, the box-shaped cavity of the matching fork and rail waist is concave.

[0041] Preferably, the fork rail rail waist type cavity is closely matched with the rail waist of the center rail, the second edge 12, the fourth edge 14, the seventh edge 17 and the ninth edge 19 of the center rail are straight edges; the second edge 12 and the third edge 13 of the center rail are connected by a rounded corner, the third edge 13 and the fourth edge 14 of the center rail are connected by a rounded corner; the seventh edge 17 and the eighth edge 18 of the center rail are connected by a rounded corner, and the eighth edge 18 and the ninth edge 19 of the center rail are connected by a rounded corner; the rounded corner radius of the fork rail rail waist type cavity corresponding to the junction of the second edge 12 and the third edge 13 of the center rail is smaller than the rounded corner radius corresponding to the center rail 1, the rounded corner radius of the fork rail rail waist type cavity corresponding to the junction of the third edge 13 and the fourth edge 14 of the center rail is smaller than the rounded corner radius corresponding to the center rail 1; the rounded corner radius of the fork rail rail waist type cavity corresponding to the junction of the seventh edge 17 and the eighth edge 18 of the center rail is smaller than the rounded corner radius corresponding to the center rail 1; the rounded corner radius of the fork rail rail waist type cavity corresponding to the junction of the eighth edge 18 and the ninth edge 19 of the center rail is smaller than the rounded corner radius corresponding to the center rail 1.

[0042] By reasonably designing the rounded corner radius of the junction of the second edge 12 and the third edge 13, the rounded corner radius of the junction of the third edge 13 and the fourth edge 14, the rounded corner radius of the junction of the seventh edge 17 and the eighth edge 18, and the rounded corner radius of the junction of the eighth edge 18 and the ninth edge 19, the contact length between the center rail 1 and the fork rail 2 is increased, thereby increasing the contact area between the center rail 1 and the fork rail 2, which is beneficial to more evenly dispersing the force generated during train operation, reducing local stress concentration, and prolonging the service life of the track.

[0043] Preferably, the slope of the second edge 12 and the fourth edge 14 of the center rail is 1:3, and the slope of the seventh edge 17 and the ninth edge 19 of the center rail is 1:3.

[0044] Preferably, the slope of the second edge 12 and the fourth edge 14 of the center rail is 1:4, and the slope of the seventh edge 17 and the ninth edge 19 of the center rail is 1:4.

[0045] For the 60kg / m track series, the slope of 1:3 is adopted.

[0046] For the 50kg / m and 75kg / m track series, the slope of 1:4 is adopted.

[0047] By reasonably designing the slope of the second edge 12, the fourth edge 14, the seventh edge 17 and the ninth edge 19, the contact length between the center rail 1 and the fork rail 2 is increased, thereby increasing the contact area between the center rail 1 and the fork rail 2, which is beneficial to more evenly dispersing the force generated during train operation, reducing local stress concentration, and prolonging the service life of the track.

[0048] In practice, the length of the inclined surface is determined according to the overall size of the center rail and the actual use requirement, and the surface roughness of the inclined surface is controlled within a suitable range to ensure the fit and friction force when matched with the fork rail.

[0049] Preferably, the left and right sides of the center rail are centrally symmetrical.

[0050] Preferably, the third edge 13 and the eighth edge 18 of the center rail are gap-fitted with the corresponding area of the web-shaped cavity of the fork rail.

[0051] Preferably, the fillet radius R a at the junction of the second edge 12 and the third edge 13 of the center rail is 0.5-5mm, and the fillet radius R b at the junction of the third edge 13 and the fourth edge 14 of the center rail is 0.5-5mm.

[0052] Preferably, the fillet radius R c at the junction of the seventh edge 17 and the eighth edge 18 of the center rail is 0.5-5mm, and the fillet radius R d at the junction of the eighth edge 18 and the ninth edge 19 of the center rail is 0.5-5mm.

[0053] A smaller and appropriate fillet radius is conducive to increasing the contact area of the bevels of the center rail and the fork rail, and ensuring the connection strength of the center rail and the fork rail.

[0054] Of course, the fillet radius R a , R b , R c , R d may not be limited to the range of 0.5-5mm, provided that the safety and reliability of railway transportation are met.

[0055] Preferably, the fillet radius R c at the junction of the seventh edge 17 and the eighth edge 18 of the center rail is 0.5-5mm, and the fillet radius R d at the junction of the eighth edge 18 and the ninth edge 19 of the center rail is 0.5-5mm.

[0056] In practice, the fillet radii Ra, Rb, Rc, and Rd can be 2mm.

[0057] Preferably, the center rail 1 and the fork rail 2 are connected by bolts, and the center rail 1 and the fork rail 2 are provided with holes through which the connecting bolts pass.

[0058] Preferably, the center rail 1 and the fork rail 2 can be made of U20Mn bainite steel or other bainite steel, and the fork rail can also be U75V. The center rail 1 and the fork rail 2 can also be made of other materials that meet the requirements of TB / T3467.

[0059] Particularly, the center rail 1 is formed by gradually reducing the thickness between the third edge 13 and the eighth edge 18 in the front and rear direction of the center rail, i.e., the length direction of the center rail, including the 1:4 or 1:3 inclined surface matching in the above-mentioned scheme, to form and achieve the wedge-shaped matching of the rail waist part of the center rail and the rail waist cavity of the frog rail.

[0060] Referring to Figure 3 The center rail and the frog rail matching structure is shown in the three-dimensional view. In the process of assembling the frog, the center rail and the frog rail are assembled according to the designed matching mode to ensure that the inclined surfaces are tightly matched. After the assembly is completed, the connection of the two can be further fixed by using bolts to form a stable center rail and frog rail matching structure, which is applied to the railway frog system.

[0061] During assembly, the inclined surface part of the center rail is slowly inserted into the rail waist cavity of the frog rail, and through accurate positioning and appropriate assembly process, the inclined surfaces of the two are completely matched.

[0062] Through the above-mentioned embodiments, the center rail and frog rail matching mode of the utility model can effectively improve the connection strength and meet the strict requirements of railway transportation on the performance of the frog.

[0063] The utility model discloses, increase the matching surface: through the fillet design of the center rail and the frog rail matching edge and the 1:4 or 1:3 inclined surface design between the center rail and the frog rail matching surface, the matching area of the center rail and the frog rail is increased significantly, compared with the traditional matching mode, the matching area can improve, thereby can more evenly disperse the force generated when the train runs, reduce local stress concentration.

[0064] Improve the connection strength: the larger matching surface and wedge-shaped matching structure make the connection between the center rail and the frog rail more firm, and through testing, the connection strength can be improved by about 1.6 times compared with the traditional mode, effectively reduces the probability of loosening, deformation and other faults of the connection part, prolongs the service life of the frog.

[0065] Improve the performance of the frog: stable connection of the center rail and the frog rail helps to improve the overall performance of the forged alloy steel center rail combined frog, improve the reliability and durability of the forged alloy steel center rail combined frog, reduce the number of maintenance and replacement, reduce the railway operation cost, improve the safety and reliability of railway transportation.

[0066] It should be noted that the above embodiments and features in the embodiments can be combined with each other without conflict.

[0067] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvements can be made, which belong to the protection range of the utility model.

Claims

1. A forged alloy steel combination frog rail and switch rail fitting structure comprising a switch rail (1) and a frog rail (2), characterized in that, The heart rail (1) is between the bifurcated heel rail (2), the heart rail (1) includes left and right sides, the left side of the heart rail (1) has a first edge (11), a second edge (12), a third edge (13), a fourth edge (14), and a fifth edge (15) from top to bottom, and the right side of the heart rail (1) has a sixth edge (16), a seventh edge (17), an eighth edge (18), a ninth edge (19), and a tenth edge (110) from top to bottom. The angle between the second edge (12) and the third edge (13) of the left side of the heart rail (1) is obtuse, the angle between the third edge (13) and the fourth edge (14) is obtuse, the angle between the seventh edge (17) and the eighth edge (18) of the right side of the heart rail (1) is obtuse, and the angle between the eighth edge (18) and the ninth edge (19) is obtuse. The outwardly convex area surrounded by the second edge (12), the third edge (13), the fourth edge (14), the seventh edge (17), the eighth edge (18), and the ninth edge (19) of the heart rail (1) is a rail waist of the heart rail (1). The corresponding area of the rail waist of the bifurcated heel rail (2) to the rail waist of the heart rail (1) is a bifurcated heel rail waist cavity. The bifurcated heel rail waist cavity is tightly matched with the rail waist of the heart rail (1).

2. The wrought alloy steel combination frog rail, switch rail mating structure of claim 1, wherein, The bifurcated heel rail waist cavity is tightly matched with the rail waist of the heart rail (1), the second edge (12), the fourth edge (14), the seventh edge (17), and the ninth edge (19) of the heart rail are straight edges, the second edge (12) and the third edge (13) of the heart rail are connected by a rounded corner, the third edge (13) and the fourth edge (14) of the heart rail are connected by a rounded corner, the seventh edge (17) and the eighth edge (18) of the heart rail are connected by a rounded corner, the eighth edge (18) and the ninth edge (19) of the heart rail are connected by a rounded corner, the radius of the rounded corner corresponding to the junction of the second edge (12) and the third edge (13) of the heart rail is smaller than the radius of the rounded corner corresponding to the junction of the second edge (12) and the third edge (13) of the heart rail (1), the radius of the rounded corner corresponding to the junction of the third edge (13) and the fourth edge (14) of the heart rail is smaller than the radius of the rounded corner corresponding to the junction of the third edge (13) and the fourth edge (14) of the heart rail (1), the radius of the rounded corner corresponding to the junction of the seventh edge (17) and the eighth edge (18) of the heart rail is smaller than the radius of the rounded corner corresponding to the junction of the seventh edge (17) and the eighth edge (18) of the heart rail (1), and the radius of the rounded corner corresponding to the junction of the eighth edge (18) and the ninth edge (19) of the heart rail is smaller than the radius of the rounded corner corresponding to the junction of the eighth edge (18) and the ninth edge (19) of the heart rail (1).

3. The wrought alloy steel combination frog rail, switch rail mating structure of claim 2, wherein, The slope of the second edge (12) and the fourth edge (14) of the heart rail is 1:3, and the slope of the seventh edge (17) and the ninth edge (19) of the heart rail is 1:

3.

4. The wrought alloy steel combination frog rail, switch rail mating structure of claim 2, wherein, The slope of the second edge (12) and the fourth edge (14) of the heart rail is 1:4, and the slope of the seventh edge (17) and the ninth edge (19) of the heart rail is 1:

4.

5. The wrought alloy steel combination frog rail, switch rail mating structure of claim 1 wherein, The left and right sides of the heart rail are centrally symmetric.

6. The wrought alloy steel combination frog rail, switch rail mating structure of claim 1, wherein, The third edge (13) and the eighth edge (18) of the heart rail correspond to the gap matching area of the bifurcated heel rail waist cavity.

7. The forged alloy steel combination frog rail, heel rail mating structure of any one of claims 3, 4, 5, 6, wherein, The fillet radius R at the junction of the second side (12) and the third side (13) of the heart rail is 0.5-5 mm a The fillet radius R at the junction of the third side (13) and the fourth side (14) of the heart rail is 0.5-5 mm b The fillet radius R at the junction of the third side (13) and the fourth side (14) of the heart rail is 0.5-5 mm 8. The forged alloy steel combination frog rail, heel rail mating structure of any one of claims 3, 4, 5, 6, characterized in that, The fillet radius R at the junction of the seventh edge (17) and the eighth edge (18) of the heart rail c is 0.5-5 mm, and the fillet radius R at the junction of the eighth edge (18) and the ninth edge (19) of the heart rail d is 0.5-5 mm.

9. The forged alloy steel combination rail and frog mating structure of any one of claims 1-6, wherein, The heart rail (1) and the bifurcated heel rail (2) are connected by bolts, and the heart rail (1) and the bifurcated heel rail (2) are provided with holes through which the connecting bolts pass.

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