A split type combined frog

Abstract

The invention discloses a split type combined frog, comprising a heart rail and a pair of wing rails, a pair of fork rails connected to the heart rail, a bridge pad is arranged in the section area from the theoretical tip of the heart rail to 50-100, an inlay block is arranged on the inner side of each wing rail, the heart rail, the wing rail and the inlay block are connected by a bolt pair, the heart rail and the fork rail are connected by a bolt pair, an anti-rotation steel washer and a spacer iron are arranged, the heart rail and the inlay block are made of forged high manganese steel or alloy steel material, both ends of the inlay block are hidden in the wing rails to present a hidden tip structure, the heart rail comprises a working section and a connecting section and both are wedge-shaped, the bottom side of the connecting section is wrapped by the fork rail, the connecting section is closely matched with the rail top bottom and the rail bottom top of the fork rail through an inclined surface; a first V-shaped inclined surface is arranged on both sides of the working section rail waist, a second inclined surface is arranged on the working section rail bottom top, the spacer iron is matched with the inlay block through a stop structure, and the inlay block is closely matched with the rail top bottom and the rail bottom top of the wing rail through an inclined surface.

Description

Technical Field

[0001] The invention relates to the field of rail transportation, in particular to a railway frog. Background Art

[0002] With the annual increase in domestic high-speed railway transportation volume, existing trunk railways are bound to develop in the direction of heavy-duty railways, and the market demand for heavy-duty turnout products has increased significantly. Heavy-duty railways, with their "four major characteristics" of large axle weight, high density, ultra-large transportation volume and less maintenance time, have imposed extremely severe operating pressure on engineering turnout equipment. Under such operating conditions, the wear and damage of the main component of the turnout, the frog, is much greater than that of ordinary lines. Existing heavy-duty turnout frogs have problems such as short life and frequent replacement, which seriously restrict the transportation capacity of heavy-duty lines. Combined frogs are a type of frog widely used outside of domestic heavy-duty railways. They can meet the requirements of laying joints and seamless lines. The main structural feature is a symmetrical structure. The mainstream frog heart rail material is made of alloy steel, high manganese steel or forged high manganese steel, so the manufacturing cost is relatively high. During the service of most frogs, the vehicle density and load on the straight frog section are much higher than those on the curved frog section. Therefore, analysis of the damage of a large number of frogs on the lower track shows that the damaged parts of the frogs are mainly in the wheel tread area of ​​the fork heart rail and wing rail of the straight frog section, while the wheel tread area of ​​the fork heart heart rail and wing rail of the curved frog section is intact. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, a split type combined frog is provided which reduces the manufacturing difficulty, improves the rigidity of the frog, uses materials with excellent performance in key parts of the frog, gives full play to the mechanical properties of the combined frog materials, reduces the manufacturing cost and the user's use cost, and is easy to install and maintain. The technical solution adopted by the present invention is:

[0004] A split type combined frog comprises a heart rail and a pair of wing rails, a pair of fork rails are connected to the heart rail, a bridge pad is arranged in the area from the theoretical tip of the heart rail to the section of 50-100, an inlay block is arranged on the inner side of each wing rail, the heart rail, the wing rail and the inlay block are connected by a bolt pair, the heart rail and the fork rail are connected by a bolt pair, an anti-rotation steel washer is arranged on the outer side of the bolt pair connection, a spacer iron is arranged between the inlay block and the heart rail, the heart rail and the inlay block are made of forged high manganese steel or alloy steel, the inlay block located at the throat is flush with the top surface of the wing rail, the front end of the inlay block is located at the section of 50-75 of the heart rail Both ends of the mosaic block are hidden in the wing rail to present a hidden tip structure. The heart rail includes a working section and a connecting section and both are wedge-shaped. The bottom of the working section contacts the bridge pad and the ordinary pad, and the bottom side of the connecting section is wrapped by the fork rail. The bottom of the fork rail contacts the ordinary pad, and the connecting section is tightly matched with the top bottom of the fork rail and the top of the rail bottom through an inclined surface; a first V-shaped inclined surface is arranged on both sides of the waist of the working section, and a second inclined surface is arranged on the top of the working section rail bottom. The spacer iron is matched with the mosaic block through a stop structure, and the mosaic block is tightly matched with the top bottom of the wing rail and the top of the rail bottom through an inclined surface.

[0005] Furthermore, a gap of 1-5mm is provided between the side surface of the hidden tip of the inlay block and the side surface of the top of the wing rail, a gap of 1-5mm is provided between the top side wall of the heart rail and the top side wall of the fork heel rail, a gap of 1-5mm is provided between the waist of the heart rail and the waist of the fork heel rail, a gap of 1-5mm is provided between the top side wall of the inlay block rail and the top side wall of the wing rail, and a gap of 1-5mm is provided between the waist of the inlay block rail and the waist of the wing rail.

[0006] The frog adopting the above structure has the following beneficial effects:

[0007] (1) Simplify the structure of the combined frog. Only the easily damaged parts of the inlay block and the heart rail are made of forged high manganese steel or alloy steel, which reduces the mass of the forged high manganese steel or alloy steel. During assembly, the connecting section is tightly fitted with the top bottom of the fork heel rail and the top of the rail bottom through the inclined surface, and the inlay block is tightly fitted with the top bottom of the wing rail and the top of the rail bottom through the inclined surface. Gaps are set in other parts, which reduces the processing allowance and reduces the manufacturing cost.

[0008] (2) The wedge-shaped structure is designed in the length direction of the two sides of the heart rail, which can be processed by forming tools to improve the manufacturing quality. The planed surface, upper bevel, lower bevel and side wall of the rail head side of the mosaic block are parallel in the entire length area, and can also be processed by forming tools to improve the manufacturing quality and efficiency. When assembling the components, the mosaic block and the wing rail are tightly matched with the upper and lower bevels, and short high-strength bolts are used to penetrate the first bolt holes at the front and rear ends of the mosaic block and fasten them to the wing rail. After the wing rail and the mosaic block are integrated, they are assembled with other parts, thereby reducing the difficulty of assembly and improving the quality and efficiency of single-piece matching.

[0009] (3) The heart rail spacer area cooperates with the fork rail to transfer the load to the pad, and the remaining parts are in direct contact with the pad area. The bottom surface of the heart rail is in contact with the pad surface. During the service of the fork, the load is transferred to the pad. A bridge pad is set in the area from the theoretical tip of the heart rail to the 50-100 section to provide support. It has a larger support area and better stability, while reducing mass and material costs.

[0010] (4) When the frog heart rail and inlay block are damaged by wheel rolling, the maintenance personnel use the line skylight time to use crowbars, special rail lifters, special wrenches, etc. to remove the frog pads and high-strength bolts, replace them with new heart rails and inlay blocks, and do not replace the other parts. They are reinstalled and the top surface of the heart rail in the installation area of ​​the fork foot rail and the heart rail is polished to ensure that the top surface of the fork foot rail and the heart rail meets the smoothness requirements, thereby reducing the user's cost of use and extending the service life of the frog. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention;

[0012] Figure 2 for Figure 1 Section view in the AA direction;

[0013] Figure 3 for Figure 1 Cross-sectional view in the middle BB direction;

[0014] Figure 4 for Figure 1 Cross-sectional view in CC direction;

[0015] Figure 5 for Figure 1 Cross-sectional view in the middle DD direction;

[0016] Figure 6 for Figure 1 Enlarged view at E in the middle;

[0017] Figure 7 It is a side view of the mosaic block;

[0018] Figure 8 It is a top view of the mosaic block;

[0019] Fig. 9 for Figure 7 Schematic diagram of the assembly structure of the mosaic block and the wing rail in the middle F direction;

[0020] Fig.10 for Figure 7 Cross-sectional view of the assembly structure of the inlay block and the wing rail in the middle GG direction;

[0021] Fig.11 for Figure 7 Schematic diagram of the assembly structure of the inlay block and the wing rail in the middle H direction;

[0022] Fig.12 It is the side view of the heart rail;

[0023] Fig.13 It is the top view of the center track;

[0024] Fig.14 for Fig.12 Sectional view in the direction of middle working section II;

[0025] Fig.15 for Fig.12 Cross-sectional view of the middle connecting section and fork rail assembly in JJ direction. DETAILED DESCRIPTION

[0026] like Figure 1 The frog shown in the figure comprises a center rail 1, a pair of wing rails 2, a pair of fork rails 3 and a pair of inlay blocks 5. The wing rails 2 are symmetrically arranged on both sides of the center rail 1. Figure 2 The inlay blocks 5 shown are all mounted on the inner side of the wing rail 2 by bolt pairs. Figure 5 The fork rails 3 are symmetrically arranged on both sides of the center rail 1 and are mounted on the center rail 1 by bolt pairs. Figure 3 and 4 As shown in FIG. 1 , a spacer iron 7 is provided between the center rail 1 and the mosaic block 5. Figures 2 to 5 As shown, an anti-rotation steel washer 6 is provided on the outside of each bolt pair connection; since the heart rail 1 and the inlay block 5 are at the most vulnerable position, the heart rail 1 and the inlay block 5 are made of forged high manganese steel or alloy steel. Compared with the traditional integral high manganese steel frog heart rail, the mass of forged high manganese steel or alloy steel is reduced. The inlay block 5 located at the throat is flush with the top plane of the wing rail 2, and the front end of the inlay block 5 (the end close to the heart rail) is located at the 50-75 section of the heart rail, as shown in FIG. Figure 6 The two ends of the inlay block 5 are hidden in the wing rail 2 to form a hidden tip structure. To provide better support for the center rail 1, as shown in FIG. Figure 1 As shown, a bridge pad 4 is provided in the area from the theoretical tip of the center rail 1 to the 50-100 section, while ordinary pads are used in the remaining parts of the frog.

[0027] like Fig.12 and 13The center rail 1 shown in the figure includes a working section 1-1 and a connecting section 1-2, both of which are wedge-shaped along the length direction of the center rail. Figure 1 The working section 1-1 shown has a rail bottom in contact with a bridge pad 4, i.e., a common pad, and directly transfers the load to the pad, while the connecting section 1-2 is connected to the fork rail 3 by a bolt pair, as shown in FIG. Fig.15 As shown, the rail waist and rail bottom of the connecting section 1-2 are wrapped by the fork rail 3, and the rail top of the connecting section 1-2 is kept flush with the fork rail 3. This part does not contact the ordinary pad, but transfers the load to the rail bottom of the fork rail 3. The rail bottom of the fork rail 3 contacts the ordinary pad and transfers the load to the ordinary pad. Fig.14 As shown, a V-shaped first inclined surface 1-3 is arranged on both sides of the rail waist of the working section 1-1, and a second inclined surface 1-4 is arranged on the top of the rail bottom of the working section 1-1. Figure 3 and 4 The spacer iron 7 can be processed by using a forming tool by closely matching the first inclined surface 1-3 and the second inclined surface 1-4, thereby improving the processing efficiency and quality. Figure 3 and 4 The spacer iron 7 and the inlay block 5 shown are matched with a stopper structure to improve the installation reliability of the spacer iron 7, the inlay block 5 and the center rail 1.

[0028] To reduce the difficulty of installation, Fig.15 The connecting section 1-2 is tightly matched with the bottom of the rail top and the top of the rail bottom of the fork rail 3 through the inclined surface. Figure 3 and Figure 4 The inlay block 5 shown is tightly fitted with the bottom of the rail top and the top of the rail bottom of the wing rail 2 through the inclined surfaces, that is, the installation is carried out by tightly fitting the inclined surfaces at both ends in the above installation, and gaps are set in the remaining parts to reduce the difficulty of installation, reduce the processing accuracy requirements, and make processing and installation more convenient.

[0029] According to the double-sided installation requirements, a certain assembly gap can be left in other parts, such as Figure 6 A gap of 1-5 mm is set between the side of the hidden tip of the mosaic block 5 and the top side of the wing rail 2. Fig.15 As shown, a 1-5mm gap is set between the top side wall of the center rail 1 and the top side wall of the fork heel rail 3, and a 1-5mm gap is set between the waist of the center rail 1 and the waist of the fork heel rail 3. Figures 2 to 4 As shown, a gap of 1-5 mm is set between the top side wall of the inlay block 5 and the top side wall of the wing rail 2, and a gap of 1-5 mm is set between the waist of the inlay block 5 and the waist of the wing rail 2. In each figure, the position where the inclined surface is tightly fitted is marked α, and the gap position is marked β.

Claims

1. A split type combined frog, comprising a center rail (1) and a pair of wing rails (2), wherein a pair of fork and heel rails (3) are connected to the center rail (1), characterized in that: A bridge pad (4) is provided in the section area from the theoretical tip of the center rail (1) to 50 to 100, and an inlay block (5) is provided on the inner side of each wing rail (2). The center rail (1), the wing rail (2) and the inlay block (5) are connected by a bolt pair, and the center rail (1) and the fork heel rail (3) are connected by a bolt pair. An anti-rotation steel washer (6) is provided on the outer side of the bolt pair connection, and a spacer iron (7) is provided between the inlay block (5) and the center rail (1). The center rail (1) and the inlay block (5) are made of alloy steel. The inlay block (5) located at the throat is flush with the top surface of the wing rail (2), the front end of the inlay block (5) is located at the 50-75 section of the heart rail (1), both ends of the inlay block (5) are hidden in the wing rail (2) to present a hidden tip structure, the heart rail (1) includes a working section (1-1) and a connecting section (1-2) and both are wedge-shaped, the bottom of the working section (1-1) is in contact with the bridge pad (4) and the ordinary pad, the bottom side of the connecting section (1-2) is wrapped by the fork rail (3), and the bottom of the fork rail (3) is in contact with the bridge pad (4) and the ordinary pad. The connecting section (1-2) is in close contact with the bottom of the rail top of the fork rail (3) and the top of the rail bottom through an inclined surface; short high-strength bolts are inserted into the first bolt holes at the front and rear ends of the inlay block to be fastened to the wing rail; the working section (1-1) is provided with a V-shaped first inclined surface (1-3) on both sides of the rail waist, and the working section (1-1) is provided with a second inclined surface (1-4) at the top of the rail bottom; the spacer iron (7) is matched with the inlay block (5) through a stop structure, and the inlay block (5) is in close contact with the top of the wing rail (2). The bottom and the top of the rail bottom are tightly fitted through the inclined surface; a gap of 1-5 mm is set between the side of the tip hidden part of the mosaic block (5) and the side of the top of the wing rail (2); a gap of 1-5 mm is set between the top side wall of the heart rail (1) and the top side wall of the fork rail (3); a gap of 1-5 mm is set between the waist of the heart rail (1) and the waist of the fork rail (3); a gap of 1-5 mm is set between the top side wall of the mosaic block (5) and the top side wall of the wing rail (2); and a gap of 1-5 mm is set between the waist of the mosaic block (5) and the waist of the wing rail (2).

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