阅读说明：本技术 一种合金钢轨腿及一种三种材料焊接制成的小半径菱形道岔 (Alloy steel rail leg and small-radius rhombic turnout welded by three materials ) 是由 周建新 吴健康 疏文龙 蔡韶峰 徐斌 肖波 张云香 于 2020-07-24 设计创作，主要内容包括：本发明公开了一种合金钢轨腿及一种三种材料焊接制成的小半径菱形道岔,合金钢轨腿包括位于上部的耐磨合金钢和位于下部的低合金钢基座,所述耐磨合金钢焊接在所述低合金钢基座的顶面上,所述合金钢轨腿沿车辆行驶方向延伸,所述耐磨合金钢的横截面大于线路上钢轨的横截面,所述耐磨合金钢顶部同向开设有与所述叉心轨槽配合的轨腿轨槽,所述合金钢轨腿端部连接到叉心、钢轨或另一个合金钢轨腿,所述叉心和所述钢轨焊接到所述合金钢轨腿端部,相连的所述合金钢轨腿之间留有空隙。合金钢轨腿的材质性能、质量和截面都比轻质轨道大,因此小半径道岔在该部分的结构强度得到明显增强,合金钢轨腿自重重,能有效抵抗冲击,保证道岔的磨耗较低。(The invention discloses an alloy steel rail leg and a small-radius diamond turnout welded by three materials, wherein the alloy steel rail leg comprises wear-resistant alloy steel positioned on the upper part and a low alloy steel base positioned on the lower part, the wear-resistant alloy steel is welded on the top surface of the low alloy steel base, the alloy steel rail leg extends along the driving direction of a vehicle, the cross section of the wear-resistant alloy steel is larger than that of a steel rail on a line, rail leg rail grooves matched with the fork center rail grooves are formed in the top of the wear-resistant alloy steel in the same direction, the end part of the alloy steel rail leg is connected to a fork center, a steel rail or another alloy steel rail leg, the fork center and the steel rail are welded to the end part of the alloy steel rail leg, and a gap is reserved between. The alloy steel rail legs are larger than light rails in material performance, quality and section, so that the structural strength of the small-radius turnout at the part is obviously enhanced, the alloy steel rail legs are heavy in self weight, impact can be effectively resisted, and the turnout is ensured to be lower in abrasion.)

1. An alloy rail leg, which is characterized in that: the steel rail comprises wear-resistant alloy steel (21) located on the upper portion and a low alloy steel base (22) located on the lower portion, wherein the wear-resistant alloy steel (21) is welded to the top face of the low alloy steel base (22), alloy steel rail legs (2) extend along the traveling direction of a vehicle, the cross section of the wear-resistant alloy steel (21) is larger than that of a steel rail (1) on a line, rail leg rail grooves (23) matched with fork center rail grooves (33) are formed in the top of the wear-resistant alloy steel (21) in the same direction, the end portions of the alloy steel rail legs (2) are connected to a fork center (3), a steel rail (1) or another alloy steel rail leg (2), the fork center (3) and the steel rail (1) are welded to the end portions of the alloy steel rail legs (2), and gaps are reserved between the connected alloy.

2. An alloy rail leg according to claim 1, wherein: one side of the rail leg rail groove (23) is a working edge (231), the other side of the rail leg rail groove is a non-working edge (232), and the non-working edge (232) is milled to form a guard rail structure.

3. An alloy rail leg according to claim 2, wherein: the cross section of wear-resisting alloy steel (21) is the rectangle and thickness is greater than low alloy steel base (22), the low alloy steel base (22) left and right sides is followed stretch out below wear-resisting alloy steel (21) and form rail leg footing (221), rail leg footing (221) top is the slope.

4. An alloy rail leg according to any one of claims 1 to 3, wherein: alloy rail leg (2) one end is equipped with weld and is received welding section (5) of fork heart (3), in welding section (5) the left and right sides symmetry of wear-resisting alloy steel (21) is equipped with recess (24), recess (24) one end is in wear-resisting alloy steel (21) terminal surface opening and the other end is in welding section (5) initial point seals, the width of the low alloy steel base (22) of welding section (5) is inwards narrowed towards the terminal surface direction until with the bottom width of wear-resisting alloy steel (21) is unanimous.

5. An alloy rail leg according to claim 4, wherein: the alloy steel rail legs (2) are steel rail legs of the same type, and one end of each alloy steel rail leg (2) is provided with a clamping plate groove (211) used for being connected with the other alloy steel rail leg (2).

6. An alloy rail leg according to claim 4, wherein: the alloy steel rail legs (2) are two types of steel rail legs, and one end face of each alloy steel rail leg (2) is welded with the end part of the steel rail (1).

7. An alloy rail leg according to any one of claims 1 to 3, wherein: the alloy steel rail legs (2) are three types of steel rail legs, one end of each alloy steel rail leg (2) is provided with a clamping plate groove (211) used for being connected with the other alloy steel rail leg (2), the other end of each alloy steel rail leg is provided with a transition section (6) welded with the end part of the steel rail (1), a working edge (231) in each transition section (6) extends along the driving direction of a vehicle, a non-working edge (232) extends towards the direction of the fork center (3) and inclines towards the working edge (231) until the narrowest part of each transition section (6) meets the requirement of the distance from a rail protection structure to the working edge (231).

8. An alloy rail leg according to claim 7, wherein: the transition section (6) is provided with a first transition part (233) and a second transition part (234) in sequence from the steel rail (1) along the rail leg rail groove (23), and the inclination angle of the non-working edge (232) of the first transition part (233) is larger than that of the non-working edge (232) of the second transition part (234).

9. The utility model provides a small radius rhombus switch that three kinds of materials welding were made, includes fork heart (3) and rail (1), its characterized in that: the fork centers (3) and the steel rail (1) are connected through the alloy steel rail leg (2) according to any one of claims 1 to 8, the fork centers (3) are divided into an upper wear-resistant block (31) and a lower base (32), the upper wear-resistant block (31) and the wear-resistant alloy steel (21) are made of the same material, the lower base (32) and the low-alloy steel base (22) are made of the same material, the upper wear-resistant block (31) is welded on the lower base (32) through the high-strength wear-resistant welding material, and the welding surface of the top of the low-alloy steel base (22) is consistent with the welding surface of the top of the lower base (32) in height.

Technical Field

The invention relates to an alloy steel rail leg and a small-radius rhombic turnout which is made by welding three materials.

Background

In the track field, a rhombic turnout structure is often adopted at the intersection position of two tracks, the existing turnout structure can basically meet the requirements of service life and reliability under most conditions, however, when the track is a light track with a small section and the turning radius is small, the overall structural strength of the turnout part is weak, and the problems of serious turnout abrasion and short service life caused by impact generated by train running are easy to occur. If adopt whole switch completely, not only the transportation difficulty, arrange moreover and receive the restriction great, a lot of environments can't use such structure, consequently need a bonding strength higher and arrange the effect and be close with prior art, be difficult for receiving the switch structure that the environment hinders to arrange.

Disclosure of Invention

The invention aims to provide a small-radius rhombic turnout welded by one alloy steel rail leg and three materials, and aims to solve the problems that in the prior art, the light steel rail has insufficient structural strength in the small-radius turnout and is seriously worn in use, so that the service life of the turnout is greatly reduced.

The alloy steel rail leg comprises wear-resistant alloy steel positioned on the upper portion and a low alloy steel base positioned on the lower portion, wherein the wear-resistant alloy steel is welded on the top surface of the low alloy steel base, the alloy steel rail leg extends along the running direction of a vehicle, the cross section of the wear-resistant alloy steel is larger than that of a steel rail on a line, rail leg rail grooves matched with the fork center rail grooves are formed in the top of the wear-resistant alloy steel in the same direction, the end portion of the alloy steel rail leg is connected to a fork center, the steel rail or another alloy steel rail leg, the fork center and the steel rail are welded to the end portion of the alloy steel rail leg, and a gap is reserved between the.

Preferably, one side of the rail groove of the rail leg is a working edge, and the other side of the rail groove of the rail leg is a non-working edge, and the non-working edge is milled to form a rail protection structure.

Preferably, the cross section of the wear-resistant alloy steel is rectangular and the thickness of the cross section of the wear-resistant alloy steel is larger than that of the low alloy steel base, the left side and the right side of the low alloy steel base extend out of the lower portion of the wear-resistant alloy steel to form rail leg feet, and the tops of the rail leg feet are slopes.

Preferably, one end of each alloy steel rail leg is provided with a welding section welded to the fork center, the left side and the right side of the wear-resistant alloy steel in the welding section are symmetrically provided with grooves, one end of each groove is opened at the end face of the wear-resistant alloy steel, the other end of each groove is closed at the starting position of the welding section, and the width of the low alloy steel base of the welding section is narrowed inwards towards the end face until the width of the low alloy steel base is consistent with the width of the bottom of the wear-resistant alloy steel.

Preferably, the alloy steel rail leg is a steel rail leg, and one end of the alloy steel rail leg is provided with a clamping plate groove used for being connected with the other alloy steel rail leg.

Preferably, the alloy steel rail legs are second-class steel rail legs, and one end face of each alloy steel rail leg is welded with the end part of the steel rail.

Preferably, the alloy steel rail legs are three types of steel rail legs, one end of each alloy steel rail leg is provided with a clamping plate groove used for being connected with the other alloy steel rail leg, the other end of each alloy steel rail leg is provided with a transition section welded with the end part of the steel rail, the working edge in the transition section extends along the driving direction of a vehicle, the non-working edge in the transition section extends towards the fork center direction and inclines towards the working edge until the narrowest part of the transition section meets the requirement of the distance from a rail protection structure to the working edge.

Preferably, the transition section is provided with a first transition part and a second transition part in sequence from the steel rail along the rail leg rail groove direction, and the inclination angle of the non-working edge of the first transition part is larger than that of the non-working edge of the second transition part.

The invention also provides a small-radius rhombic turnout which is formed by welding three materials, and the small-radius rhombic turnout comprises fork cores and steel rails, wherein the fork cores and the steel rails are connected through the alloy steel rail legs, the fork cores are divided into an upper wear-resisting plate and a lower base, the upper wear-resisting plate is made of the same material as the wear-resisting alloy steel, the lower base and the low-alloy steel base are made of the same material, the upper wear-resisting plate is welded on the lower base through the high-strength wear-resisting welding material, and the height of a welding surface of the top of the low-alloy steel base is consistent with that of a welding surface of the top of the.

The invention has the advantages that: the material performance, the quality and the section of the alloy steel rail legs are larger than those of a light rail, so that the structural strength of the small-radius turnout at the part is obviously enhanced, the alloy steel rail legs are heavy in self weight due to the increase of the material performance and the quality, the impact can be effectively resisted, the fixation of a rail frame is better realized, and the abrasion generated in the use process is also greatly reduced. The welding area of the alloy steel rail leg at the joint with the fork center is reduced, and the same double-layer alloy structure enables the alloy steel rail leg and the fork center to form the same material welding during welding, so that the welding quality is effectively improved.

In addition, the transition section and the non-working edge serving as the guard rail structure are adopted, the guard rail structure is high in rigidity and long in length, and the guard rail is arranged in the whole diamond-shaped area, so that the safety and stability of driving can be effectively guaranteed. When the wheel passes through the transition section, the transverse offset of the wheel can be adjusted relatively smoothly, so that the guard rail structure can take effect on the wheel, and the guard rail structure can play a role in protecting the wheel and cannot generate large impact and vibration when a train enters.

Drawings

FIG. 1 is a cross-sectional view of an alloy rail leg according to the present invention.

FIG. 2 is a cross-sectional view of the welding of the second type of rail legs to the rails of the present invention.

Fig. 3 is a cross-sectional view of the welding of three types of rail legs to rails in the present invention.

Figure 4 is a schematic view of the construction of the end portions of the alloy rail legs of the present invention joined to one another.

Fig. 5 is a schematic structural diagram of a small-radius diamond turnout made of three materials by welding.

Fig. 6 is a partially enlarged view of the structure shown in fig. 5.

FIG. 7 is a schematic structural view of the welding position of the alloy steel rail leg and the steel rail in the invention.

FIG. 8 is a cross-sectional view of the fork center of the present invention.

FIG. 9 is a cross-sectional view of the alloy rail leg and fork center weld.

The reference numbers in the figures are: 1. the steel rail comprises a steel rail, 2, alloy steel rail legs, 21, wear-resistant alloy steel, 211, a clamping plate groove, 22, a low-alloy steel base, 221, rail leg feet, 23, a rail leg rail groove, 231, a working edge, 232, a non-working edge, 233, a first transition portion, 234, a second transition portion, 24, a groove, 3, a fork center, 31, an upper wear-resistant block, 32, a lower base, 33, a fork center rail groove, 4, a clamping plate connecting structure, 5, a welding section, 6 and a transition section.

Detailed Description

The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.

As shown in fig. 1-9, the invention provides an alloy rail leg 2 and a small-radius rhombic switch made by welding three materials, wherein the alloy rail leg 2 is used for forming the small-radius rhombic switch, and the small-radius rhombic switch comprises a rail 1 and four fork centers 3 which form two tracks besides the alloy rail leg 2.

The alloy rail leg 2 comprises an upper wear-resistant alloy steel 21 and a lower low alloy steel base 22, the wear-resistant alloy steel 21 being welded to the top surface of the low alloy steel base 22. The cross section of wear-resisting alloy steel 21 is the rectangle and thickness is greater than low alloy steel base 22, the low alloy steel base 22 left and right sides is followed stretch out below wear-resisting alloy steel 21 and form rail leg footing 221, rail leg footing 221 top is the slope, has improved the bullet strip and has suppressed the effect to alloy rail leg 2, and the installation is more reliable. The alloy steel rail legs 2 extend along the running direction of the vehicle, and the cross section of the wear-resistant alloy steel 21 is larger than that of the steel rail 1 on the line, so that the alloy steel rail legs and the steel rail 1 can be conveniently welded.

The wear-resistant alloy steel 21 provides better wear resistance, machining performance and material strength, so that the rail groove can be milled through machining, the non-working edge 232 can be milled to form a guard rail structure, one side of the rail leg rail groove 23 is the working edge 231, the other side of the rail leg rail groove is the non-working edge 232, and the non-working edge 232 is milled to form the guard rail structure. The guard rail has high structural rigidity and longer length, and the guard rail is arranged in the whole diamond area, so that the safety and stability of driving can be effectively guaranteed.

The alloy rail legs 2 are classified into first-type rail legs, second-type rail legs and third-type rail legs according to the difference between the two end connecting members. Different types of alloy rail legs 2 have different connection structures at the ends. The turnout adopts the alloy steel rail legs 2, the sectional area of the turnout is larger than that of the common steel rail 1, and the strength is enhanced. Due to the increase of material performance and quality, the alloy steel rail legs 2 are heavy in weight, can effectively resist impact and can better realize the fixation of a track frame.

One end of one type of steel rail leg is welded on a fork center 3, the alloy steel rail leg 2 is provided with a welding section 5 welded on the fork center 3 at the end, grooves 24 are symmetrically arranged on the left side and the right side of the wear-resistant alloy steel 21 in the welding section 5, one end of each groove 24 is opened at the end face of the wear-resistant alloy steel 21, the other end of each groove 24 is closed at the beginning of the welding section 5, and the width of a low-alloy steel base 22 of the welding section 5 is narrowed inwards towards the end face until the width is consistent with the width of the bottom of the wear-resistant alloy steel 21. The wear-resistant alloy steel 21 is provided with a groove at the waist of the welded part, and the area of the end face of the low-alloy steel base 22 is also reduced at the position, so that the welding area of the end face of the alloy steel rail leg 2 is reduced, and the welding quality is improved.

The other ends of the steel rail legs are used for being connected with other alloy steel rail legs 2, clamping plate grooves 211 are arranged to be matched with clamping plate connecting structures 4 to be connected with the end parts of the alloy steel rail legs 2, and gaps are reserved among the alloy steel rail legs 2 connected in the structure to adapt to deformation caused by expansion with heat and contraction with cold.

One end of the second type steel rail leg is welded with the fork core 3 through the welding section 5 with the same structure, and the end face of the other end is directly welded with the end face of the steel rail 1.

One end of the three types of steel rail legs is provided with a clamping plate groove 211 with the same structure as that of the steel rail legs of one type to connect with other alloy steel rail legs 2, the other end of the three types of steel rail legs is provided with a transition section 6 welded with the end part of the steel rail 1, a working edge 231 in the transition section 6 extends along the driving direction of the vehicle, a non-working edge 232 in the transition section extends towards the fork center 3 and inclines towards the working edge 231 until the narrowest part of the transition section 6 meets the requirement of the distance from a rail protection structure to the working edge 231. The transition section 6 is provided with a first transition part 233 and a second transition part 234 in sequence from the steel rail 1 along the rail leg rail groove 23, and the inclination angle of the non-working edge 232 of the first transition part 233 is larger than that of the non-working edge 232 of the second transition part 234. Therefore, when the wheel passes through the transition section 6, the transverse offset of the wheel can be adjusted smoothly, so that the guard rail structure can take effect on the wheel, and the guard rail structure can play a role in protecting the wheel and can not generate large impact and vibration when a train enters.

In the small-radius rhombic turnout, each fork center 3 is connected into the rhombic turnout through a first class of mutually connected steel rail legs in a pairwise manner, the second class of steel rail legs form the short side of the turnout connecting fork center 3 and the steel rail 1, the first class of steel rail legs and the third class of steel rail legs are connected to form the long side of the connecting fork center 3 and the steel rail 1, and the long side is provided with a structure formed by connecting two sections of alloy steel rail legs 2 because the length of the long side is obviously larger than the short side, so that the.

The fork center 3 is divided into an upper wear-resistant block 31 and a lower base 32, the upper wear-resistant block 31 is made of the same material as the wear-resistant alloy steel 21, the lower base 32 is made of the same material as the low alloy steel base 22, the upper wear-resistant block 31 is welded on the lower base 32 through the high-strength wear-resistant solder, and the height of the welding surface of the top of the low alloy steel base 22 is consistent with that of the welding surface of the top of the lower base 32.

The material of the wear-resistant alloy steel 21 and the upper wear-resistant block 31 is NM360, and the material of the low-alloy steel base 22 and the lower base 32 is Q345 steel. Therefore, as the fork core 3 and the alloy steel rail leg 2 are made of the same materials and have the same laminated structure and are welded together by the same materials, the welding is easier, the welding strength is higher, and the structural strength of the turnout is improved. The ends of the second-class steel rail legs and the third-class steel rail legs are welded with the steel rail 1 made of U75V materials, enough welding strength can be guaranteed, the fork center 3 and a plurality of components of the turnout are welded into an integral frame, the structure is stable, and the reliability is high.

The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution of the invention, or to apply the inventive concept and solution directly to other applications without modification.