A seamless combined frog

Abstract

The present invention relates to a seamless combined frog, which includes a frog heart, wing rails, and heel rails. There are a front frog spacer and a rear frog spacer at the front section L1 and the rear section L2 of the frog heart respectively. The front frog spacer and the rear frog spacer are engaged with the wing rails and heel rails, and bolts are used for fastening and installation. Advantages: Compared with the prior art 1, firstly, the cooperation length between the wing rail and the frog heart in the present invention is shorter, about 1 / 4 of that in the prior art, without an intermediate spacer and an inner splint. Therefore, the structure of the present invention is simple and suitable for mass production. Secondly, the main structural components in the prior art are the switch rail, wing rails, and welded wing rails, among which the switch rail and the welded wing rails are made of alloy steel. The main components are vulnerable components or components prone to failure. However, the main structural component in the present invention is the frog heart, and the frog heart can be manufactured using a variety of materials or processes, with a wider material adaptability. If the main structure fails during service, it can be assembled online with replacement, resulting in low manufacturing costs and low maintenance costs.

Description

Technical Field

[0001] The present invention relates to a seamless combined frog that can not only greatly shorten the matching length of the frog point and the wing rail, reduce the amount of wing rail used, lower the manufacturing difficulty of components, improve the manufacturing accuracy, significantly reduce the assembly difficulty between the wing rail and the frog point, but also achieve seamless or jointed connection of the track, belonging to the field of seamless frog manufacturing. Background Art

[0002] 1. CN 201915302 U, named "A new type of welded wing rail combined frog for railway track", includes wing rails arranged on both sides and a frog point located between the wing rails. The wing rail is welded by ordinary rail segments at both ends and a special steel rail segment in the middle, with two weld seams. Its characteristics are that a reinforcing protection spacer is arranged between the frog point and the wing rails on both sides, and the weld seam near the toe end on the wing rail is within the length range of the reinforcing protection spacer; through holes for bolt connection are provided on the frog point, the reinforcing protection spacer and the wing rail, and fixed installation is realized through a connecting bolt assembly, as shown in Figure 12 . The problems it has are: (1) Figure 12 The matching length of one wing rail and the frog point in [reference] is relatively long, and the position of the rear end (the end) of the wing rail has exceeded the 50 mm section of the frog point. The amount of wing rail used and the matching range between the wing rail and the frog point are relatively large. Therefore, in actual production, the manufacturing difficulty is relatively large. In addition, since the wing rail is welded by three sections of rails of the same rail type but different materials, the requirements for welding technology and welding quality are extremely high, the promotion difficulty is relatively large, there are many components, the assembly difficulty is large, the manufacturing cost is high, and the interchangeable assembly of the frog point cannot be realized. (2) Figure 12 In [reference], one wing rail is welded by three sections of rails of the same rail type but different materials, and there are 4 weld seams for the two wing rails of a set of frogs. After being put into use, the maintenance personnel need to conduct non-periodic flaw detection on the weld seams, increasing the maintenance workload of the combined frog.

[0003] 2. Traditional combined frog structure: (1) The combined frog mainly consists of a frog point, wing rails, and frog heel rails, and is fixedly installed by bolt pairs, two types of rail washers, and spacers, with a symmetrical structure, as shown in Figure 1 . (2) The spacer plates protruding from the vertical walls on both sides of the frog point are mated with the fishplates of the wing rails and frog heel rails on both sides, and the wheel load is transmitted through the path of the top of the frog point - vertical wall - bottom of the rail member - sleeper plate - sleeper to ensure the running stability. (3) The frog point can be made of cast high manganese steel, forged high manganese steel, or special steel; the wing rail is made of U75V or other materials. (4) The frog point is made of the same material. After the frog is in service, the service life of the manganese frog point, wing rail, etc. is ensured. The problems it has are: The frog point is entirely made of cast high manganese steel, forged high manganese steel, or special steel. The matching length between the wing rail and the frog point is relatively large, there are many components, increasing the manufacturing cost, and it is difficult to achieve on-line or off-line interchangeable assembly. Summary of the Invention

[0004] Design purpose: To avoid the deficiencies in the background technology, a seamless combined frog is designed, which can not only significantly shorten the matching length of the frog nose and wing rail, reduce the amount of wing rail used, lower the manufacturing difficulty of components, improve the manufacturing precision, significantly reduce the assembly difficulty between the wing rail and the frog nose, but also achieve seamless or jointed connection of the track.

[0005] Design scheme: The present invention aims to research and develop a seamless combined frog. As Figures 1-4 shown, the combined frog mainly consists of a frog nose, a left frog heel rail, a right frog heel rail, a left wing rail, and a right wing rail, which are connected by bolt pairs. The frog nose can be made of high manganese steel, forged high manganese steel, or alloy steel. The front and rear sections of the frog nose are spacer structures, and the spacer parts at the front and rear of the frog nose cooperate with the wing rail and the frog heel rail, and bolt pairs are used to achieve fastening and installation.

[0006] As Figures 5-7 shown, the front and rear sections of the frog nose are in spacer structures, located in section L1 and section L2 respectively, and the wheel treads gradually decrease towards both ends. As Figures 5-7 the toe end lowering section and the heel end lowering section in Figures 5-7 shown. When the train passes through this section, smooth transitions of the wheels between the frog nose and the wing rail, and between the frog nose and the frog heel rail are respectively achieved, avoiding the occurrence of the problem that the smaller tread of the frog nose spacer fails under the rolling of the wheels, meeting the requirements of the wheel-rail relationship. For example, when the train passes through the combined frog in the forward direction, it gradually transitions from the frog heel rail to the rear tread of the frog nose, passes through the frog throat, and then gradually transitions from the front tread of the frog nose to the wing rail; when the train passes through the combined frog in the reverse direction, it gradually transitions from the wing rail to the front tread of the frog nose, passes through the frog throat, and then gradually transitions from the rear tread of the frog nose to the frog heel rail. The main purposes of this structure are: First, the combined frog realizes seamless butt joint with the track rail through the "thermit welding" method, improving the smoothness of the train passing through the frog; Second, compared with the combined frog structure of the traditional structure, in this structure, the frog nose is the main structure of the combined frog, and the matching length L1 between the frog nose and the wing rail is shorter. The limit position and the front end of L1 are located at the throat position of the combined frog throat, as shown in Figure 12, is more than twice the length of this structure. Therefore, the amount of wing rails used is significantly increased. The biggest drawback is that the matching length between the wing rail and the switch point is relatively long, the manufacturing precision requirements for components are high, and the manufacturing and assembly are extremely difficult. The switch point cannot be assembled interchangeably. At the same time, when the assembled frog reaches the end of its service life and needs to be replaced, the maintenance personnel need to replace the entire frog. For seamless tracks, the rail welds also need to be cut. The replacement cost for just one set of frog is about 10,000 - 20,000 yuan. However, for this structure, the matching surface between the wing rail and the switch point is shorter, and the difficulty of controlling the manufacturing precision of individual parts is greatly reduced. Interchangeable assembly during the manufacturing process and on-site interchangeable assembly can be achieved, reducing the interchangeable assembly cost by more than 60%. The L1 section and L2 section of the switch point spacer are machined, and the bottom surface has a stepped structure with the bottom surface of the middle area of the switch point, and the height difference is 0 - 40 mm to avoid interference between components and at the same time meet the quality requirements for the cooperation of the wing rail and the heel rail. The switch point spacer splint can be continuously or intermittently closely fitted with the wing rail and the heel rail. According to the installation dimension requirements of different turnout sleepers corresponding to the frog, except for the switch point width dimensions A, B, C, D, E, F, etc. in the L1 and L2 sections, they can be equal or unequal. The area from the front end to the rear end of the switch point covers the throat and the 50 mm cross-section area of the heart rail. The weakest part of the strength of the assembled frog, the section from the 50 mm cross-section of the heart rail to the throat section, is located in the switch point area. When the train passes through the assembled frog, this area alone bears the wheel load.

[0007] As Figures 8 to 11 shown, the left wing rail, right wing rail, left heel rail, and right heel rail are bent. The bending angles G1, G2, G3, G4 have a bending range of 0° - 35°. The rail heads of the parts matching with the switch point spacer are planed to improve the matching quality with the switch point. The left wing rail, right wing rail, left heel rail, and right heel rail can be made of the same material as the track, and the rail types are "I-shaped" series rails such as 43 kg, 50 kg, 60 kg, 75 kg, 115RE, 132RE, 136RE, 60E1, 54E1, BS100A, BS80A, etc.

[0008] Through innovative design of the conversion part of the wheel-rail relationship before and after the frog in the combination of the present invention, the matching length between the switch point and the wing rail is significantly shortened, the machining and assembly difficulties are reduced, seamless or jointed track connections can be achieved, and the structural problem of the inability to interchangeably assemble the switch point on and off the line is solved, having high promotion value. The key technical points are as follows: (1) As Figures 5-7 shown, the front section and rear section of the switch point are in the form of a spacer structure, located in the L1 section and L2 section respectively, and the wheel treads gradually decrease towards both ends. (2) As Figures 1-4 shown, the left heel rail, right heel rail, left wing rail, and right wing rail of the assembled frog are installed with the L1 section and L2 section of the switch point spacer through bolt pairs. (3) As Figures 5-7 shown, according to the installation dimension requirements of different turnout sleepers corresponding to the frog, except for the switch point width dimensions A, B, C, D, E, F, etc. in the L1 and L2 sections, they can be equal or unequal. (4) As Figures 1-4 ,Figures 5-7 The front end to the rear end of the frog heart shown covers the throat and the 50-mm-wide cross-section area of the switch rail. The weakest part of the combined frog in terms of strength is the section from the 50-mm-wide cross-section of the switch rail to the throat, which is located in the frog heart area and bears the wheel load alone. (5) As Figures 8 to 11 shown, the left wing rail, the right wing rail, the left frog heel rail, and the right frog heel rail are bent. The bending angle range is as follows: the bending angles G1, G2, G3, and G4 are respectively 0° to 35°. The rail heads at the parts cooperating with the frog heart spacer are planed. (6) As Figures 5-7 shown, the L1 section and L2 of the frog heart spacer are machined. The bottom surface has a stepped structure with the bottom surface of the middle area of the frog heart, and the height difference is 0 to 40 mm. (7) The left wing rail, the right wing rail, the left frog heel rail, and the right frog heel rail can be made of the same material as the track, and the rail types can be "I-shaped" series rails such as 43 kg, 50 kg, 60 kg, 75 kg, 115RE, 132RE, 136RE, 60E1, 54E1, BS100A, BS80A, etc.

[0009] Technical solution: A seamless combined frog includes a frog heart, wing rails, and frog heel rails. The front section L1 and the rear section L2 of the frog heart respectively have a front frog heart spacer and a rear frog heart spacer. The parts of the front frog heart spacer and the rear frog heart spacer cooperate with the wing rails and the frog heel rails, and bolt pairs are used to achieve fastening and installation.

[0010] Compared with the background technology, first, compared with the background technology 1, the cooperation length between the wing rail and the frog heart in the present invention is shorter, about 1 / 4 of the cooperation length in the background technology 1. There is no Figure 12 intermediate spacer and inner splint. Therefore, the present invention has fewer components and a simple structure, which is suitable for mass production. The main structural components in the background technology are the switch rail, the wing rail, and the welded wing rail. Among them, the materials of the switch rail and the welded wing rail are alloy steel. The main components are vulnerable parts or parts prone to failure. However, the main structural component in the present invention is the frog heart, and the frog heart can be made of various materials or processes, such as cast high manganese steel, forged high manganese steel, alloy steel materials, etc. The material adaptability is wider. When the main structure fails during service, it can be interchanged and assembled online, with low manufacturing cost and low maintenance cost.

[0011] Second, compared with the traditional combined frog structure, the main body of the combined frog in the present invention is the frog heart, and there are fewer other components. If the frog heart is made of high manganese steel, it solves the problem that the integral cast high manganese steel frog cannot be applied to the seamless track. Third, the combined frog in the present invention innovatively designs the parts where the wheel-rail relationship is converted before and after the frog, greatly shortening the cooperation length between the frog heart and the wing rail, reducing the amount of wing rail used, lowering the manufacturing difficulty of the components, improving the manufacturing accuracy, significantly reducing the assembly difficulty between the wing rail and the frog heart, and being able to achieve seamless or jointed connection of the track, solving the structural problem that the frog heart of the traditional combined frog cannot be interchanged and assembled online and offline, and having high market promotion value. Description of the Drawings

[0012] Figure 1 It is a schematic top view structure diagram of a seamless combined frog.

[0013] Figure 2 It is Figure 1 The schematic A-A sectional view structure diagram in

[0014] Figure 3 It is Figure 1 The schematic B-B sectional view structure diagram in

[0015] Figure 4 It is Figure 1 The schematic C-C sectional view structure diagram in

[0016] Figure 5 It is a schematic structure diagram of the front and rear sections of the frog heart presenting an adjustable spacer structure.

[0017] Figure 6 It is Figure 5 The schematic diagram of the front tread surface of the frog heart in

[0018] Figure 7 It is Figure 5 The schematic diagram of the rear tread surface of the frog heart in

[0019] Figure 8 It is a schematic structure diagram of the left wing rail.

[0020] Figure 9 It is a schematic structure diagram of the right wing rail.

[0021] Figure 10 It is a schematic structure diagram of the left frog heel rail.

[0022] Figure 11 It is a schematic structure diagram of the right frog heel rail.

[0023] Figure 12 It is a schematic diagram of Background Technology 1. In the figure: 1. Front end of ordinary rail; 2. Bolt pair; 3. Weld seam; 4. Welded wing rail; 5. Rear section of ordinary rail; 6. Adjustable spacer; 7. Inner splint; 8. Outer splint.

[0024] Figure 13 It is a schematic top view of Background Technology 2.

[0025] Figure 14 It is Figure 13 The schematic A-A sectional view diagram in

[0026] Figure 15 It is Figure 13 The schematic B-B sectional view diagram in, in the figure: 1. A-type rail washer; 2. Manganese frog heart; 3. B-type rail washer; 4. Bolt pair; 5. Wing rail.

[0027] Figure 16Yes Figure 13 It is a schematic cross-sectional view of the C-C part. In the figure, 6. Fork heel rail; 7. Spacer. Specific implementation mode

[0028] Example 1: Refer to the appendix Figure 1 . A seamless combined frog, including a frog heart, wing rails, and fork heel rails, is characterized in that: there are a front frog spacer 9 and a rear frog spacer 10 in the front section L1 and the rear section L2 of the frog heart respectively. The positions of the front frog spacer 9 and the rear frog spacer 10 cooperate with the wing rails 4 and 5, and the fork heel rails 2 and 3, and bolts 6 are used to achieve fastening and installation. The wing rails refer to the left wing rail 4 and the right wing rail 5. The fork heel rails refer to the left fork heel rail 2 and the right fork root rail 3. The left wing rail 4, the right wing rail 5, the left fork heel rail 2, and the right fork heel rail 3 are bent, and the bending angle ranges G1, G2, G3, and G4 are 0° to 35° respectively (G refers to the rail). The rear tread 7 and the front tread 8 of the frog heart gradually decrease towards both ends. When the wheel passes through the combined frog in the forward direction, it gradually transitions from the fork heel rail to the rear tread of the frog heart, passes through the frog throat 13, and then gradually transitions from the front tread of the frog heart to the wing rail; when the wheel passes through the combined frog in the reverse direction, it gradually transitions from the wing rail to the front tread of the frog heart, passes through the frog throat, and then gradually transitions from the rear tread of the frog heart to the fork heel rail. The bottom surfaces of the front frog spacer 9 and the rear frog spacer 10 and the bottom surface of the middle area of the frog heart have a stepped structure, and the height difference is 0 to 40 mm. The frog spacer splint 11 is in continuous or intermittent close fit with the wing rail and the fork heel rail. The rail heads of the left wing rail, the right wing rail, the left fork heel rail, and the right fork heel rail at the cooperating positions with the front frog spacer 9 and the rear frog spacer 10 are planed. The front end 12 to the rear end 15 of the frog heart cover the throat and the 50-mm-wide cross-section area of the heart rail. The weakest part of the strength of the combined frog, the section from the 50-mm-wide cross-section of the heart rail to the throat section, is located in the frog heart area and bears the wheel load alone. The left wing rail, the right wing rail, the left fork heel rail, and the right fork heel rail are made of the same material as the track, and the rail types are 43 kg, 50 kg, 60 kg, 75 kg, 115RE, 132RE, 136RE, 60E1, 54E1, BS100A, and BS80A I-shaped steel rails. According to the installation dimension requirements of different switch tie plates corresponding to the frog, except for the front section L1 and the rear section L2 of the frog heart, the width dimensions A, B, C, D, E, F, etc. of the frog heart are equal or not equal.

[0029] It should be understood that: Although the above embodiments have made relatively detailed written descriptions of the design concept of the present invention, these written descriptions are only simple written descriptions of the design concept of the present invention, rather than limitations on the design concept of the present invention. Any combination, addition, or modification that does not exceed the design concept of the present invention falls within the protection scope of the present invention.

Claims

1. A seamless combined frog, comprising a frog heart, wing rails, and heel rails, characterized in that: The front section L1 of the frog heart and the rear section L2 of the frog heart are respectively provided with a front frog heart spacer (9) and a rear frog heart spacer (10). The parts of the front frog heart spacer (9) and the rear frog heart spacer (10) cooperate with the left wing rail (4), the right wing rail (5), and the frog heel rails (2, 3), and bolts (6) are used to achieve fastening and installation; the rail heads of the parts where the left wing rail, the right wing rail, the left frog heel rail, and the right frog heel rail cooperate with the front frog heart spacer (9) and the rear frog heart spacer (10) are planed. The left wing rail (4), the right wing rail (5), the left frog heel rail (2), and the right frog heel rail (3) are bent. The area from the front end (12) to the rear end (15) of the frog heart covers the throat and the 50-mm-wide cross-section area of the switch rail. The weakest part of the combined frog in terms of strength is the section from the 50-mm-wide cross-section of the switch rail to the throat section, which is located in the frog heart area and bears the wheel load alone.

2. The seamless combined frog according to claim 1, characterized in that: The bending angle ranges G1, G2, G3, and G4 are respectively 0° to 35°.

3. The seamless combined frog according to claim 1, characterized in that: The rear tread (7) and the front tread (8) of the frog heart gradually decrease towards both ends. When the wheel passes through the combined frog in the forward direction, it gradually transitions from the frog heel rail to the rear tread of the frog heart, passes through the frog throat (13), and then gradually transitions from the front tread of the frog heart to the wing rail; when the wheel passes through the combined frog in the reverse direction, it gradually transitions from the wing rail to the front tread of the frog heart, passes through the frog throat, and then gradually transitions from the rear tread of the frog heart to the frog heel rail.

4. The seamless combined frog according to claim 1, characterized in that: The bottom surfaces of the front frog heart spacer (9) and the rear frog heart spacer (10) and the bottom surface of the middle area of the frog heart form a stepped structure, and the height difference is 0 to 40 mm.

5. The seamless combination frog according to claim 1, characterized in that: The frog heart spacer splint (11) is in continuous or intermittent close fit with the wing rail and the frog heel rail.

6. The seamless combined frog according to claim 1, wherein: The left wing rail, the right wing rail, the left frog heel rail, and the right frog heel rail are made of the same material as the track, and the rail types are 43 kg, 50 kg, 60 kg, 75 kg, 115RE, 132RE, 136RE, 60E1, 54E1, BS100A, and BS80A I-shaped steel rails.

7. The seamless combined frog according to claim 1, characterized in that: According to the different requirements for the installation dimensions of the switch tie plates corresponding to the frog, except for the front section L1 and the rear section L2 of the frog heart, the values of the frog heart width dimensions A, B, C, D, E, and F are equal or unequal.

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