TY type steel rail heat treatment equipment

Abstract

The utility model provides TY type steel rail heat treatment equipment, and relates to the technical field of rail machining. The TY type steel rail heat treatment equipment comprises a bracket, a double-turn magnetic induction heating coil and a bearing device, wherein the double-turn magnetic induction heating coil is fixed on the bracket; the double-turn magnetic induction heating coil comprises a first heating mechanism, a second heating mechanism and a top heating mechanism. The top heating mechanism is provided with a top heating space, the first heating mechanism is provided with a first heating space, the second heating mechanism is provided with a second heating space, and the magnetic field density of the first heating space and the second heating space is smaller than that of the top heating space; the bearing device is installed at the bottom of the double-turn magnetic induction heating coil and used for positioning a steel rail body to be subjected to heat treatment. The double-turn magnetic induction heating coil and the bearing device are matched in a sliding mode in the preset direction. According to the treatment equipment, the heating temperature of the tread of the rail head can be increased, the overheat and overburning risk of the side cambered surface can be reduced, potential safety hazards are reduced, and the steel rail heat treatment quality is high.

Description

Technical Field

[0001] This utility model relates to the field of railway rail processing technology, and more specifically, to a TY-type steel rail heat treatment equipment. Background Technology

[0002] TY-type rails are a key component of high-speed railway turnouts. Their function is to guide wheels smoothly through the frogs, preventing direct collisions between the wheels and the frog's point rails, thus ensuring safe operation. TY-type rails have an asymmetrical cross-section. To connect with the track rails, one end has a symmetrical standard rail cross-section, while the other end has an asymmetrical irregular cross-section (this part mainly serves as a frame). To extend the service life of the wing rails, the rail head needs heat treatment to increase its working surface hardness and wear resistance. In existing technology, medium-frequency induction heating is generally used to quench the rail head in the working section of the wing rail. However, due to the inconsistent and wide width range of the rail head after processing, the large size of the wider section and the overall asymmetry of the cross-section pose a significant challenge to maintaining the uniformity of the overall temperature of the rail head. Due to the characteristics of induction heating, the temperature of the rail components is mainly concentrated on the surface of the rail after heating. The "wide and flat" rail head prevents the core from being fully heated, resulting in a "dark" area in the center of the rail head tread. The insufficient heating layer leads to the tread hardening layer depth and hardness distribution not meeting the standard requirements after cooling.

[0003] The inventors discovered that existing TY-type rail heat treatment devices have at least the following drawbacks:

[0004] To ensure that the tread heating temperature meets the requirements, the power of the induction heating equipment is generally increased and / or the moving speed of the wing rail relative to the induction heating equipment is reduced. While this can increase the tread heating temperature, it also leads to the concentration of heat on the side arc surface of the rail head, which may cause overheating or even burning, posing a safety hazard. Utility Model Content

[0005] The purpose of this utility model is to provide a TY-type rail heat treatment equipment, which can not only increase the heating temperature of the rail head tread surface, but also reduce the risk of overheating and burning of the side arc surface, reduce safety hazards, and improve the quality of rail heat treatment.

[0006] The embodiments of this utility model are implemented as follows:

[0007] In a first aspect, this utility model provides a TY-type rail heat treatment equipment, comprising:

[0008] The system comprises a support frame, a double-turn magnetic induction heating coil, and a support device. The double-turn magnetic induction heating coil is fixed to the support frame. The double-turn magnetic induction heating coil includes a first heating mechanism, a second heating mechanism, and a top heating mechanism. The first and second heating mechanisms are connected to both sides of the top heating mechanism. The top heating mechanism has a top heating space, the first heating mechanism has a first heating space, and the second heating mechanism has a second heating space. The magnetic field density of the first heating space and the magnetic field density of the second heating space are both less than the magnetic field density of the top heating space. The support device is installed at the bottom of the double-turn magnetic induction heating coil and is used to position the rail body to be heat-treated. The double-turn magnetic induction heating coil and the support device are slidably engaged in a predetermined direction.

[0009] In an optional embodiment, the dual-turn magnetic induction heating coil further includes a magnetic conductor, which is mounted on the top heating mechanism such that the magnetic field density of the top heating mechanism is greater than the magnetic field density of the first heating mechanism and the second heating mechanism.

[0010] In an optional embodiment, the number of magnetic conductors is multiple, and the magnetic conductors are detachably connected to the top heating mechanism.

[0011] In an optional embodiment, the dual-turn magnetic induction heating coil further includes a heat dissipation mechanism located above the top heating mechanism.

[0012] In an optional embodiment, the heat dissipation mechanism includes a plurality of heat dissipation fins, all of which are located above the top heating mechanism and are arranged at intervals.

[0013] In an optional embodiment, the TY-type rail heat treatment equipment further includes a moving device, on which the bearing device is mounted, and the moving device is used to drive the bearing device to move relative to the double-turn magnetic induction heating coil in the preset direction.

[0014] In an optional embodiment, the TY-type rail heat treatment equipment further includes a jet cooling device, which is installed on the bracket and is used to spray air onto the heated portion of the rail body.

[0015] In an optional embodiment, the air outlet of the air-jet cooling device is retractable, or the angle of the air outlet of the air-jet cooling device is adjustable.

[0016] In an optional embodiment, the TY-type rail heat treatment equipment further includes a temperature monitor, which is installed on the bracket and used to obtain the heating temperature of the rail body.

[0017] In an optional embodiment, the bracket is provided with two guide wheels arranged opposite to each other, and a positioning space is formed between the two guide wheels for the rail body to pass through. The two guide wheels cooperate to limit the position of the rail body in its width direction.

[0018] The beneficial effects of this utility model embodiment are:

[0019] In summary, the TY-type rail heat treatment equipment provided in this embodiment, during use, has the rail head simultaneously placed in the first heating space, the top heating space, and the second heating space. The magnetic field density of the top heating space formed by the top heating mechanism is designed to be greater than that of the first heating space formed by the first heating mechanism and the second heating space formed by the second heating mechanism. After the double-turn magnetic induction heating coil is energized, more heat is generated in the top heating space, which corresponds precisely to the tread surface of the rail head, thereby increasing the heating temperature of the tread surface. After quenching, the hardness depth and distribution range of the tread surface meet the standard requirements. Since only the magnetic field density of the top heating space is increased, the heat generated in the first and second heating spaces will not increase during operation, resulting in minimal impact on the heating of the rail head fillet. In other words, the risk of overheating or even burning of the rail head fillet is low, leading to high overall rail heat treatment quality and ensuring that the hardness of the rail body meets the standard requirements. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the TY-type rail heat treatment equipment according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of a double-turn magnetic induction heating coil according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the double-turn magnetic induction heating coil from another perspective, according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the rail body;

[0025] Figure 5 for Figure 4 A schematic diagram of the AA direction;

[0026] Figure 6 for Figure 4A schematic diagram of the BB direction.

[0027] icon:

[0028] 001-Rail body; 011-Rail head; 012-Rail web; 013-Rail base; 014-Rail head tread; 015-Rail head circular surface; 016-Narrow rail section; 017-Transition rail section; 018-Wide rail section; 019-Milling position; 100-Bracket; 110-Guide wheel; 200-Double-turn magnetic induction heating coil; 210-First heating mechanism; 211-First heating space; 220-Second heating mechanism; 221-Second heating space; 230-Top heating mechanism; 231-Top heating space; 240-First arc-shaped heating mechanism; 250-Second arc-shaped heating mechanism; 260-Magnetic conductor; 270-Heat dissipation fins; 300-Bearing device; 400-Heat dissipation pipe; 500-Air jet cooling device. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In existing technologies, to ensure that the tread surface of rail head 011 meets the required heating temperature, methods such as increasing the power of the induction heating mechanism and reducing the vehicle speed to extend the heating time are generally used. Although this increases the heating temperature of the rail head tread surface 014, it also increases the heating temperature of the rounded corners on both sides of rail head 011. This is because the rounded corners on both sides of rail head 011 are located at the junction of the top heating area and the side heating area of ​​the induction heating mechanism, and are simultaneously heated by both areas. The heat is concentrated and the temperature is high. If the temperature of the top heating area is increased, the temperature of the round surface 015 of rail head will inevitably increase. As a result, the round surface 015 of rail head is prone to overheating or even burning due to excessive temperature, which affects the heat treatment quality of rail head 011.

[0036] In view of this, the designer provides a TY-type rail heat treatment equipment, which can not only increase the heat treatment temperature of the rail head tread 014 of the turnout rail, so that the hardness depth and hardness distribution range of the rail head tread 014 meet the standard requirements, but also easily increase the heating temperature of the rail head circular surface 015, so that overheating and burning are not likely to occur at the rail head circular surface 015, and the quenching heat treatment quality is high.

[0037] Please combine Figures 4-6 It should be noted that the rail body 001 includes the connected rail head 011, rail web 012, and rail base 013. The top surface of the rail head 011 is the tread surface, and the left and right sides are the non-working surface and the working surface, respectively. Furthermore, the transition between the tread surface and the working surface, as well as between the tread surface and the non-working surface, is rounded. Additionally, the width of the rail head 011 is not uniform throughout its extension direction. Specifically, the rail head 011 includes connected narrow rail section 016, transition rail section 017, and wide rail section 018 in its extension direction. The width of the narrow rail section 016 is less than the width of the wide rail section 018, and the width of the transition rail section 017 gradually increases from the narrow rail section 016 to the wide rail section 018. During heat treatment, quenching is performed progressively from the narrow rail section 016 to the wide rail section 018. This is because quenching of the wing rail involves localized heating of the rail head 011. Under the combined effects of thermal and structural stresses, quenching and cooling results in a warped shape with warped ends and a concave center, placing significant pressure on the post-heating adjustment process. Furthermore, applying substantial mechanical force to straighten the rail longitudinally negatively impacts its quality. Therefore, reverse deformation treatment is necessary during quenching to balance the effects of thermal and structural stresses. If the rail is quenched from the center towards the toe, i.e., from the wide rail section 018 to the narrow rail section 016, when the induction heating device reaches the end, the rail's heating deformation and the applied reverse deformation cause it to bend with a convex center. The distance between the top surface of the rail head (i.e., the tread surface) and the induction heating device is inconsistent, resulting in uneven temperature distribution across different locations within the last length of the induction heating device, thus affecting the heat treatment quality. Therefore, in this embodiment, a quenching method is adopted from the narrow rail section 016 to the wide rail section 018. At the beginning of quenching, since the rail component has not yet been subjected to reverse deformation, the distance between the rail top and the induction heating device is consistent at all parts. On the wide rail section 018, starting from the milling position 019, the endpoint is a position not less than the width of a double-turn magnetic induction heating coil 200 in a direction away from the narrow rail section 016. By heat-treating the narrow rail section 016 first, the influence of deformation on the heat treatment quality during the treatment of the rail body 001 is reduced. Starting from the milling position 019, the remaining positions away from the narrow rail section 016 (i.e., the frame part) do not directly contact the wheel and only serve as frame support. Therefore, the heat treatment requirements for the frame part are lower than those for the narrow rail section 016, with no technical requirements for hardness, hardened layer depth, etc.

[0038] Please combine Figures 1-3In this embodiment, the TY-type rail heat treatment equipment includes a support 100, a double-turn magnetic induction heating coil 200, and a supporting device 300. The double-turn magnetic induction heating coil 200 is fixed to the support 100. The double-turn magnetic induction heating coil 200 includes a first heating mechanism 210, a second heating mechanism 220, and a top heating mechanism 230. The first heating mechanism 210 and the second heating mechanism 220 are connected to both sides of the top heating mechanism 230 in the width direction. The top heating mechanism 230 has a top heating space 231, the first heating mechanism 210 has a first heating space 211, and the second heating mechanism 220 has a second heating space 221. The magnetic field density of the first heating space 211 and the magnetic field density of the second heating space 221 are both less than the magnetic field density of the top heating space 231. The supporting device 300 is installed at the bottom of the double-turn magnetic induction heating coil 200 and is used to position the rail body 001 to be heat treated. The double-turn magnetic induction heating coil 200 and the supporting device 300 are slidably engaged in a preset direction.

[0039] As described above, the working method of the TY-type rail heat treatment equipment provided in this embodiment includes, for example:

[0040] The rail body 001 moves relative to the double-turn magnetic induction heating coil 200 with its narrow rail section 016 as the front end. The movement speed can be adjusted as needed, enabling automated and precise control. During the movement of the rail body 001, the double-turn magnetic induction heating coil 200 heats the corresponding position of the rail head 011 of the rail body 001. Specifically, the top heating mechanism 230 heats the tread surface of the rail head 011, while the first heating mechanism 210 and the second heating mechanism 220 heat the two sides of the rail head 011, respectively. Because the magnetic field density of the heating space of the top heating mechanism 230 is greater than that of the first heating space of the first heating mechanism 210 and the second heating space of the second heating mechanism 220, the heat generated in the area of ​​the top heating space is greater after the double-turn magnetic induction heating coil 200 is energized. Since the tread surface of the rail head 011 is located within the top heating space, the heating temperature of the tread surface can be increased. After quenching, the hardness depth and distribution range of the tread surface meet the standard requirements. Since only the magnetic field density of the top heating space is increased, the heat in the first and second heating spaces will not increase during the quenching process. This has little impact on the heating of the rail head circular surface 015, meaning that the risk of overheating or even burning of the rail head circular surface 015 is small. The overall heat treatment quality of the rail is high, and the hardness of the rail body 001 meets the standard requirements.

[0041] The following embodiments illustrate the details of the TY-type rail heat treatment equipment provided in this application by way of example.

[0042] Please combine Figure 1In this embodiment, optionally, the TY-type rail heat treatment equipment includes a support 100, a double-turn magnetic induction heating coil 200, a bearing device 300, a moving device (not shown), a jet cooling device 500, and a temperature monitor (not shown). The support 100 is fixed in the workshop. The double-turn magnetic induction heating coil 200, the jet cooling device 500, and the temperature monitor are all mounted on the support 100. The double-turn magnetic induction heating coil 200 heats the rail head 011 of the rail body 001 as it passes by. The jet cooling device 500 quenches a portion of the heated rail body 001 by jet cooling. The temperature monitor can acquire the temperature at a corresponding location in real time and guide the heat treatment process based on the temperature information. For example, multiple temperature monitors can be used, distributed on both sides of the double-turn magnetic induction heating coil 200, in the middle of the double-turn magnetic induction heating coil 200, and at corresponding positions of the jet cooling device 500. The support device 300 is mounted above the moving device and is used to position the rail body 001. The moving device is used to drive the support device 300 and the rail body 001 to move together relative to the double-turn magnetic induction heating coil 200, and to make the end of the narrow rail section 016 of the rail body 001 the front end.

[0043] In this embodiment, optionally, the bracket 100 can be configured as a steel frame structure, which has high strength, good high-temperature resistance, long service life, is not prone to deformation, and has high stability. Furthermore, a pair of guide wheels 110 can be provided on the bracket 100, forming a positioning space between the two guide wheels 110 for the rail body 001 to pass through. The two guide wheels 110 cooperate to limit the position of the rail body 001 in its width direction. It should be understood that there can be multiple pairs of guide wheels 110, distributed along the length direction of the rail body 001, to improve the guiding and limiting effect.

[0044] Please combine Figure 2 and Figure 3In this embodiment, optionally, the double-turn magnetic induction heating coil 200 includes a first heating mechanism 210, a second heating mechanism 220, a top heating mechanism 230, a magnetic conductor 260, and heat dissipation fins 270. The first heating mechanism 210 and the second heating mechanism 220 are distributed on both sides of the top heating mechanism 230 in the width direction, which is perpendicular to a preset direction. During quenching, the width direction of the top heating mechanism 230 is consistent with the width direction of the rail body. Simultaneously, the first heating mechanism 210 and the second heating mechanism 220 can be symmetrically arranged. The rail body 001 passes through multiple heating spaces. A first arc-shaped heating mechanism 240 is formed between the top heating mechanism 230 and the first heating mechanism 210, and the radius of the circle containing the first arc-shaped heating mechanism 240 can be set between 17-19 mm. Correspondingly, a second arc-shaped heating mechanism is formed between the top heating mechanism 230 and the second heating mechanism 220, and the radius of the circle containing the second arc-shaped heating mechanism can be set between 17-19 mm. In this embodiment, the first arc-shaped heating mechanism 240 and the second arc-shaped heating mechanism are symmetrically arranged, and both have a radius of 18mm. The first arc-shaped heating mechanism 240 and the second arc-shaped heating mechanism correspond to the positions of the rail head circular surfaces 015 on both sides of the rail head 011. By increasing the distance between the first arc-shaped heating mechanism 240 and the second arc-shaped heating mechanism and the corresponding rounded corners, the rail head circular surfaces 015 are less likely to overheat or burn.

[0045] Furthermore, the lower edges of the first heating mechanism 210 and the second heating mechanism 220 can be extended downwards by a certain distance relative to the rail head tread surface 014. This allows for more uniform heating of the two sides of the rail head 011 in its width direction, resulting in a more uniform hardness depth distribution on both sides. (Please refer to...) Figure 3 The section line area marked at the rail head 011 indicates the hardness depth distribution area of ​​rail head 011.

[0046] In addition, the first arc-shaped heating mechanism 240 and the second arc-shaped heating mechanism 250 are symmetrically arranged, and their positions are basically the same. The distance between the center of any arc-shaped heating mechanism and the center of the rail head fillet can be set to 21-23mm to ensure that the rail head fillet is not easily overheated.

[0047] Meanwhile, the magnetic conductor 260 is mounted on the top heating mechanism 230, and the two can be fixedly connected by a snap-fit ​​structure for easy assembly and disassembly. The number and arrangement of the magnetic conductors 260 can be set as needed, thereby enabling more precise adjustment of the magnetic field distribution of the top heating mechanism 230 and preventing the magnetic field at the location of the top heating mechanism 230 from affecting the first heating mechanism 210 and the second heating mechanism 220. For example, in this embodiment, one magnetic conductor 260 is used, and the dimension of the magnetic conductor 260 in the preset direction is (55-65)% of the width of the rail head 011. For example, in this embodiment, the dimension of the magnetic conductor 260 in the preset direction can be set to 66mm, etc. Furthermore, the magnetic conductors 260 are mounted on the top heating mechanism 230 and arranged symmetrically with respect to the centerline of the rail head 011. In this way, the position of the magnetic conductors 260 is reasonable, reducing interference with the magnetic field of the heating mechanisms on both sides.

[0048] It should be noted that in this embodiment, the magnetic conductor 260 is formed by stacking multiple magnetic sheets, each with a thickness of 0.3-0.35 mm. Furthermore, starting from one side, heat dissipation fins 270 with a thickness of 0.5-1.5 mm are added between adjacent magnetic sheets at intervals of 20-25 mm. These heat dissipation fins 270 can be made of copper and, in conjunction with a heat dissipation pipe 400 made of copper tubing, achieve cooling, thereby enhancing the heat dissipation effect of the magnetic conductor 260, reducing magnetic property decay, and extending its service life. In addition, the heat dissipation pipe 400 can be located on top of the magnetic conductor 260. The heat dissipation pipe 400 can be a bent pipe, providing a large coverage area and good heat dissipation effect.

[0049] It should be understood that the heat dissipation fins 270 are located above the top heating mechanism 230. In other embodiments, other types of heat dissipation mechanisms can be provided above the top heating mechanism 230, as long as they can enhance the heat dissipation effect.

[0050] In this embodiment, optionally, the mobile device can be controlled by a stepper motor or the like to achieve automatic speed adjustment, which is convenient, flexible and more accurate.

[0051] It should be understood that in other embodiments, the bearing device 300 may be stationary relative to the rail body 001, while the double-turn magnetic induction heating coil 200 and the air-jet cooling device 500 may move relative to the rail body 001.

[0052] In this embodiment, optionally, the air-jet cooling device 500 can spray high-pressure gas onto the rail head 011, allowing the rail head 011 to cool rapidly for quenching. The air outlet of the air-jet cooling device 500 can be telescopic or have an adjustable angle, thus allowing the position of the air outlet relative to the rail head tread surface 014 to be adjusted as needed, providing flexibility and a wide range of applications. Obviously, in other embodiments, the position and angle of the air outlet of the air-jet cooling device 500 can be set to fixed values.

[0053] It should be understood that in some embodiments, the distance between the air outlet of the air jet cooling device 500 and the rail head tread surface 014 can be set to 22-25mm.

[0054] The TY-type rail heat treatment equipment provided in this embodiment increases the local heating power by adjusting the magnetic field density at a local location of the double-turn magnetic induction heating coil 200, thereby increasing the temperature of the local heating space and raising the heating temperature of the rail head tread 014. This prevents the formation of a "dark" area in the center of the rail head tread 014, resulting in high quenching quality and hardness depth that meets standard requirements. Simultaneously, it has minimal impact on the rounded corners on both sides of the rail head 011, reducing the likelihood of overheating or burning at the rounded corners.

[0055] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A TY-type rail heat treatment equipment, characterized in that, include: The system comprises a support (100), a double-turn magnetic induction heating coil (200), and a support device (300), wherein the double-turn magnetic induction heating coil (200) is fixed to the support (100); the double-turn magnetic induction heating coil (200) includes a first heating mechanism (210), a second heating mechanism (220), and a top heating mechanism (230); the first heating mechanism (210) and the second heating mechanism (220) are connected to both sides of the top heating mechanism (230); the top heating mechanism (230) has a top heating space (231), and the first heating mechanism... (210) has a first heating space (211), and the second heating mechanism (220) has a second heating space (221). The magnetic field density of the first heating space (211) and the magnetic field density of the second heating space (221) are both less than the magnetic field density of the top heating space (231). The supporting device (300) is installed at the bottom of the double-turn magnetic induction heating coil (200) and is used to position the rail body (001) to be heat-treated. The double-turn magnetic induction heating coil (200) and the supporting device (300) are slidably engaged in a preset direction.

2. The TY-type rail heat treatment equipment according to claim 1, characterized in that: The double-turn magnetic induction heating coil (200) also includes a magnetic conductor (260), which is mounted on the top heating mechanism (230) so that the magnetic field density of the top heating mechanism (230) is greater than the magnetic field density of the first heating mechanism (210) and the second heating mechanism (220).

3. The TY-type rail heat treatment equipment according to claim 2, characterized in that: The number of magnetic conductors (260) is multiple, and the magnetic conductors (260) are detachably connected to the top heating mechanism (230).

4. The TY-type rail heat treatment equipment according to claim 1, characterized in that: The dual-turn magnetic induction heating coil (200) also includes a heat dissipation mechanism located above the top heating mechanism (230).

5. The TY-type rail heat treatment equipment according to claim 4, characterized in that: The heat dissipation mechanism includes multiple heat dissipation fins (270), which are all located above the top heating mechanism (230) and arranged at intervals.

6. The TY-type rail heat treatment equipment according to claim 1, characterized in that: The TY-type rail heat treatment equipment also includes a moving device, on which the bearing device (300) is mounted. The moving device is used to drive the bearing device (300) to move relative to the double-turn magnetic induction heating coil (200) in the preset direction.

7. The TY-type rail heat treatment equipment according to claim 1, characterized in that: The TY-type rail heat treatment equipment also includes a jet cooling device (500), which is installed on the bracket (100) and is used to spray air onto the heated portion of the rail body (001).

8. The TY-type rail heat treatment equipment according to claim 7, characterized in that: The air outlet of the air-jet cooling device (500) is retractable, or the angle of the air outlet of the air-jet cooling device (500) is adjustable.

9. The TY-type rail heat treatment equipment according to claim 1, characterized in that: The TY-type rail heat treatment equipment also includes a temperature monitor, which is installed on the bracket (100) and is used to obtain the heating temperature of the rail body (001).

10. The TY-type rail heat treatment equipment according to claim 1, characterized in that: The bracket (100) is provided with two guide wheels (110) arranged opposite to each other, and a positioning space is formed between the two guide wheels (110) for the rail body (001) to pass through. The two guide wheels (110) cooperate to limit the position of the rail body (001) in its width direction.

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