Double-frequency steel rail welding seam electromagnetic induction heating device and using method thereof

Abstract

The invention particularly relates to a double-frequency steel rail welding seam electromagnetic induction heating device and a using method thereof. The double-frequency steel rail welding seam electromagnetic induction heating device comprises a flat car, and an upper connecting column and a lower connecting column which are arranged on an upper top plate and a lower bottom plate of the flat car; the lifting device is arranged at the front end of the flat car and comprises a front shaft, a rear shaft, a hydraulic rod and a plurality of supporting rods; the embedding device is arranged at the front end of the supporting rod and comprises an embedding plate, a supporting plate, a telescopic rod and a supporting column; the induction heater is arranged on the supporting column and comprises a left coil and a right coil, the left coil and the right coil are of opening and closing type coil structures with the same shape and size, the lower portion of each coil structure is of a bent structure profiling a steel rail, a hinge shaft is arranged in the middle of each coil structure, and a transmission rod transversely extending front and back is arranged at the top of each coil structure. The left coil and the right coil are symmetrically arranged, and the middle of the left coil and the middle of the right coil are movably matched with the supporting column through a hinge shaft. The device has the advantages that automatic operation and accurate and intelligent positioning of the heating coil are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment of rails, in particular to a dual-frequency rail weld electromagnetic induction heating device and a use method thereof. Background Art

[0002] The application of seamless rails in rail transit projects is becoming more and more widespread. At present, due to the limitations of construction technology and other factors, the construction of seamless rails is mostly completed on site. Among them, the normalizing process after welding is a key link, which can improve the organizational properties of the weld and make it closer to the properties of the rail parent material, thereby ensuring the bearing capacity, wear resistance and safety of the seamless rail. The quality and efficiency of the normalizing process depend on the mechanization and intelligent operation of the normalizing heating equipment.

[0003] In the prior art, a Chinese invention patent (patent number CN202122229060.9) discloses a rail normalizing device, which includes a frame, a clamping assembly on the frame, a reciprocating swinging assembly, a heating assembly on the swinging assembly, and a water-gas assembly connected to the heating assembly.

[0004] However, the prior art is not suitable for operating double rails at the same time, and does not use intelligent positioning function to determine the weld position. It has the defect of low flame energy utilization rate, and also has the problems of complex structural design and inconvenient operation. Therefore, it is urgent to design a new electromagnetic induction heating device to realize intelligent and automatic operation of weld normalizing. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a dual-frequency rail weld electromagnetic induction heating device and a method of using the same, so as to improve the mechanization level, automation level and intelligence level in the heat treatment operation of the rail weld, thereby reducing the labor workload and increasing the accuracy and efficiency of the heat treatment of the rail weld.

[0006] In order to achieve the above-mentioned purpose, a dual-frequency electromagnetic induction heating device for rail welds is designed, including: a flatbed car, the flatbed car includes: an upper top plate and a lower bottom plate which are arranged in parallel and up and down, a number of pillars arranged between the upper top plate and the lower bottom plate, an upper connecting column is arranged on the bottom surface of the upper top plate, and a lower connecting column is arranged on the upper surface of the lower bottom plate; a lifting device, arranged at the front end of the flatbed car, including: a front axle and a rear axle, both of which are arranged in parallel front and back, and the rear axle forms a rotational fit with the through hole on the lower connecting column; a hydraulic rod, one end of which is rotationally fitted with the upper connecting column through the connecting shaft, and the other end of which is rotationally fitted with the front axle through the through hole at the end of the hydraulic rod; a number of support rods, which are movably fitted with the front axle and the rear axle respectively to form a frame structure at the front end of the lifting device; a fitting device, arranged at the front end of the support rod, including: a fitting plate, the fitting plate is fixedly connected to the front end of the support rod, and the lower part of the fitting plate is provided with a groove which is shaped like the rail, which is used to form a fitting with the rail , a plurality of arc-shaped through grooves are provided on the upper part of the mosaic plate; a support plate is horizontally arranged in the middle part of the mosaic plate and is arranged on one side surface of the mosaic plate close to the support rod; a telescopic rod is vertically arranged on the support plate, and the top end of the telescopic rod is rotatably matched with the plurality of connecting rods through a connecting shaft; a support column is arranged in the middle part of the mosaic plate and is arranged on one side surface of the mosaic plate away from the support rod; an induction heater is arranged on the support column, including: a left coil and a right coil, the left coil and the right coil are opening and closing coil structures of the same shape and size, the lower part of the coil structure is a bending structure that imitates the shape of the rail, a hinge shaft is arranged in the middle part, and a transmission rod that is laterally extended front and rear is arranged on the top part, the transmission rod passes through the arc-shaped through groove and is rotatably matched with the connecting rod, the left coil and the right coil are symmetrically arranged, and the middle part is movably matched with the support column through the hinge shaft, so that the left coil and the right coil are driven by the connecting rod to perform lever movement with the hinge shaft as the fulcrum, and cooperate to form the opening and closing movement of the coil structure.

[0007] Preferably, the present invention also includes: a plurality of running wheels are provided on the bottom surface of the lower base plate; a positioning device includes an L-shaped support rod, one end of the L-shaped support rod is fixedly connected to the bottom surface of the lower base plate, and the other end is provided with a plurality of laser lights and a plurality of cameras.

[0008] Preferably, the present invention also includes: the support rod is a step-shaped bending structure, a through hole is provided at the rear end of the support rod to cooperate with the rear axle for rotation, and a through hole is provided at the step-shaped bending corner of the step-shaped bending structure to cooperate with the front axle for rotation.

[0009] Preferably, the present invention further comprises: the support rod is further provided with: a plurality of mounting plates, on which intermediate frequency generators are provided; a plurality of branch rings, in which electric wires and water circulation channels are passed, for forming position limits for the electric wires and the water circulation channels.

[0010] Preferably, the present invention further comprises: a fixing ring is provided above the support plate and on one side of the engaging plate close to the support rod, and the fixing ring is sleeved and matched with the telescopic rod to achieve position limiting of the telescopic rod.

[0011] Preferably, the present invention further comprises: a wire outlet hole is also provided on the mosaic plate, so that the wires and the water circulation channel pass through the wire outlet hole to be conductively connected with the left coil and the right coil.

[0012] Preferably, the present invention further comprises: the hinge shaft is made of insulating high temperature resistant material.

[0013] Preferably, the present invention further comprises: a terminal block is provided on the left coil or the right coil for conducting and connecting with the electric wire and the water circulation passage.

[0014] The present invention also provides a method for using the above-mentioned electromagnetic induction heating device, and the specific implementation method is as follows: step S1, transporting a normalizing operation vehicle equipped with a dual-frequency rail weld electromagnetic induction heating device to a construction site; step S2, using a positioning device to locate the weld; a camera identifies the weld, and a laser light is irradiated on the middle position of the weld; step S3, using a lifting device to lower the interlocking device and the induction heater; step S4, the interlocking plate is stably embedded on the rail; step S5, using the telescopic rod and connecting rod on the interlocking device to drive the induction heater to close; the right coil and the left coil slide in the arc-shaped through groove of the interlocking plate to drive the coil to open and close; step S6, after the coil is closed, current is passed through for normalizing operation; step S7, after the normalizing is completed, the coil is opened, and the induction heater is lifted using the lifting device to complete the normalizing operation; after the above work is completed, you can go to the next work point and start the next operation.

[0015] Compared with the prior art, the present invention has the following advantages: 1. An opening and closing coil and a hydraulic telescopic device are designed, and the hydraulic telescopic device is used to realize the automatic opening and closing of the heating coil, thereby realizing the automatic operation of the heating coil and saving installation time.

[0016] 2. A fitting device is designed to carry the induction heating coil and the lifting device to prevent the heat dissipated by the heating coil from damaging the circuit and parts, and further restrict the space distance between the coil and the weld, saving the time of coil support and positioning. 3. A supporting structure is designed to realize the lifting and lowering of the induction heating device through a hydraulic device and a connecting rod structure.

[0017] 4. A positioning device was designed to achieve precise and intelligent positioning of the dual-frequency electromagnetic induction heating device through laser lights, cameras and display interfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 , working diagram of dual-frequency electromagnetic induction heating device; Figure 2 , schematic diagram of the structure of the dual-frequency electromagnetic induction heating device; Figure 3 , front view of the dual-frequency electromagnetic induction heating device; Figure 4 , schematic diagram of the bottom structure of the dual-frequency electromagnetic induction heating device; Figure 5 , schematic diagram of the structure of a flatbed car with a dual-frequency electromagnetic induction heating device; Figure 6 , partial schematic diagram of the lifting of the dual-frequency electromagnetic induction heating device; Figure 7 , schematic diagram of the lifting structure of the dual-frequency electromagnetic induction heating device; Figure 8 , schematic diagram of the supporting structure of the dual-frequency electromagnetic induction heating device; Fig. 9 , schematic diagram of automatic shrinkage structure of dual-frequency electromagnetic induction heating device; Fig.10 , schematic diagram of the bottom surface of the automatic shrinkage structure of the dual-frequency electromagnetic induction heating device; Fig.11 , schematic diagram of the working of the embedded plate of the dual-frequency electromagnetic induction heating device; Fig.12 , a side view of a mating plate of a dual-frequency electromagnetic induction heating device; Fig.13 , a top view of the embedded plate of the dual-frequency electromagnetic induction heating device; Fig.14 , a front view of the embedded plate of the dual-frequency electromagnetic induction heating device; Fig.15 , schematic diagram of the support rod structure of the dual-frequency electromagnetic induction heating device; Fig.16 , schematic diagram of the positioning structure of the dual-frequency electromagnetic induction heating device; Fig.17 , a partial enlarged view of the automatic shrinkage structure of the dual-frequency electromagnetic induction heating device; Fig.18 , schematic diagram of the automatic contraction structure pull rod of the dual-frequency electromagnetic induction heating device; Fig.19 , schematic diagram of the dual-frequency electromagnetic induction heating coil structure; Fig. 20 , front view of the coil structure of the dual-frequency electromagnetic induction heating device; Fig.21 , schematic diagram of the right coil structure of the dual-frequency electromagnetic induction heating device; Fig. 22 , side view of the right coil of the dual-frequency electromagnetic induction heating device; Fig.23 , schematic diagram of the left coil structure of the dual-frequency electromagnetic induction heating device; Fig.24 , side view of the left coil of the dual-frequency electromagnetic induction heating device; Fig.25 , schematic diagram of the structure of the intermediate frequency generator of the dual-frequency electromagnetic induction heating device; In the figure: 1 rail, 2 flatbed car, 3 lifting device, 4 fitting device, 5 induction heater, 6 positioning device, 2.1 upper top plate, 2.2 power supply device, 2.3 upper connecting column, 2.4 lower connecting column, 2.5 lower bottom plate, 2.6 pillar, 3.1 connecting shaft, 3.2 hydraulic rod, 3.3 front axle, 3.4 rear axle, 3.5 support rod, 3.6 intermediate frequency generator, 3.7 mounting plate, 4.1 support plate, 4.2 fixing ring, 4.3 fitting plate, 4.4 wire outlet hole, 4.5 connecting shaft, 4.6 telescopic rod, 4.7 connecting rod, 4.8 bolt hole, 4.9 arc through groove 4.10 supporting column, 5.1 right coil, 5.2 left coil, 5.3 terminal head, 5.4 hinged shaft, 5.5 bending structure of coil, 6.1 L-shaped supporting rod, 6.2 laser light, 6.3 camera. DETAILED DESCRIPTION

[0019] In order to make the purpose, principle and structure of the present invention more clear, it is further described below in conjunction with the drawings and specific embodiments.

[0020] Example 1: Structural composition of a dual-frequency rail weld electromagnetic induction heating device See also Figures 1 to 25 The device mainly includes a rail transport flatbed vehicle 2, a lifting device 3, a fitting device 4, a positioning device 6 and an open-and-close induction heating coil 5.

[0021] The rail transport flatbed vehicle 2 is mainly used to carry and transport the integral heating device and transport it to the construction site.

[0022] The flatbed 2 includes an upper top plate 2.1, a lower bottom plate 2.5 and a plurality of pillars 2.6. The upper top plate 2.1 and the lower bottom plate 2.5 arranged in parallel are fixedly connected by a plurality of pillars 2.6 to form a frame structure. The frame of the flatbed 2 is provided with an induction heating power supply and a cooling circulation device. In addition, connecting components are provided at the upper and lower parts of the flatbed 2 for connecting the lifting device 3. The connecting components include an upper connecting column 2.3 and a lower connecting column 2.4. The upper connecting column 2.3 is connected to a hydraulic rod 3.2 through a connecting shaft 3.1, and the hydraulic rod 3.2 can rotate around the upper connecting column 2.3; the lower connecting column 2.4 cooperates with the rear axle 3.4 through a through hole, and the rear axle 3.4 can rotate 360° in the through hole of the lower connecting column 2.4.

[0023] The lifting device 3 is composed of a hydraulic rod 3.2, a front axle 3.3, a rear axle 3.4 and a support rod 3.5. The front axle 3.3 is arranged in parallel with the rear axle 3.4, and the two axles are movably connected by a number of support rods 3.5. A through hole is provided at the front end of the hydraulic rod 3.2, and the hydraulic rod 3.2 is movably connected to the front axle 3.3 through the through hole, and the front axle 3.3 rotates in the through hole. The support rod 3.5 presents a stepped bending structure, and a through hole is provided at the stepped bending corner of the bending structure to be movably connected to the front axle 3.3, and a through hole is provided at the rear end of the support rod 3.5, and the rear axle 3.4 is movably connected to the rear end through hole; when in use, the front end of the hydraulic rod 3.2 contracts and stretches the front axle 3.3 to move upward, thereby realizing the fan-shaped lifting movement of the entire interlocking device 4 with the rear axle 3.4 as the rotating axis. A mounting plate 3.7 is also provided at the step-shaped bending corner of the support rod 3.5, and the intermediate frequency generator 3.6 is mounted on the mounting plate 3.7 by screws and is electrically connected to the induction heating power supply. A connecting plate is provided at the front end of the support rod 3.5 to connect with the interlocking device. In addition, multiple support rings for supporting lines are provided on both sides of the support rod 3.5 to facilitate the passage and laying of wires and water circulation pipes.

[0024] A positioning device 6 is provided on the bottom surface of the lower bottom plate 2.5 of the flatbed car 2, which includes: an L-shaped support rod 6.1, a laser lamp 6.2 and a camera 6.3. The rear end of the L-shaped support rod 6.1 is fixedly connected to the bottom surface of the lower bottom plate 2.5 of the flatbed car. A small column is provided at the front end of the L-shaped support rod 6.1, and two cameras 6.3 are provided on both sides of the middle position of the small column to realize the display and observation of the weld position on the display screen, and two symmetrical laser lamps 6.2 are provided above the camera 6.3 to irradiate the laser on the weld position to realize accurate spot positioning, and the positioning is observed through the display screen, or the visual recognition system in artificial intelligence is used to achieve the purpose of automatic machine recognition of the weld position through image acquisition and neural network training, without manual recognition, and the intelligent recognition of machine vision is more accurate and convenient, avoiding manual positioning errors and saving working time. The bottom surface of the lower bottom plate of the flatbed car 2 is also provided with a plurality of running wheels for running on the rail 1.

[0025] The interlocking device 4 is composed of a support plate 4.1, a fixing ring 4.2, an interlocking plate 4.3, a wire outlet hole 4.4, a connecting shaft 4.5, a telescopic rod 4.6, a connecting rod 4.7, a bolt hole 4.8, a sliding groove 4.9 and a supporting column 4.10.

[0026] The embedding plate 4.3 is in the shape of a rectangular parallelepiped as a whole, and a groove conforming to the steel rail 1 is provided at the bottom thereof, so as to embed the embedding plate 4.3 on the steel rail 1, realize the precise positioning of the embedding device 4 and the steel rail 1, and realize that the distance between each component of the device and the steel rail 1 is always the same during the positioning after each movement. The induction heater 5 arranged on the embedding plate 4.3 maintains a certain spatial distance from the steel rail weld, and this distance is obtained by theoretical calculation, and the size of the embedding plate 4.3 channel is designed according to the known distance.

[0027] The interlocking plate 4.3 is provided with a plurality of bolt holes 4.8 in the middle, and one side of the interlocking plate 4.3 is connected to the front end of the support rod 3.5 through the bolt holes 4.8 and bolts. A support plate 4.1 is provided in the middle of one side of the interlocking plate 4.3 near the support rod 3.5, and the support plate 4.1 is fixedly connected to the interlocking plate 4.3. A hollow cylindrical support is provided on the support plate 4.1, and a plurality of triangular plates are connected between the cylindrical support and the support plate 4.1 to achieve support on the side wall. A telescopic rod 4.6 is vertically arranged on the support plate 4.1, and the bottom of the telescopic rod 4.6 is arranged in the cylindrical support. The interlocking plate 4.3 is also provided with a fixing ring 4.2 on the upper part of the same side of the support plate 4.1, and the fixing ring 4.2 is sleeved and matched with the telescopic rod 4.6 to achieve position limiting of the telescopic rod 4.6.

[0028] The telescopic rod 4.6 is movably connected to the two connecting rods 4.7 through the connecting shaft 4.5. Both ends of the connecting rods 4.7 are respectively provided with cylindrical through holes and can rotate around the connecting shaft.

[0029] The upper part of the embedded plate 4.3 is provided with two symmetrically arranged arc-shaped through grooves 4.9, which are in the shape of an arc. The embedded plate 4.3 is laterally provided with a support column 4.10 in the middle of a side surface away from the support rod 3.5.

[0030] The induction heater 5 is composed of a right coil 5.1, a left coil 5.2, a terminal 5.3 and a hinge shaft 5.4. The induction heater 5 is an open-and-close coil, wherein the right coil 5.1 and the left coil 5.2 are structures of the same shape and size and are symmetrically arranged. The two coils are connected in the middle by a hinge shaft 5.4, and the left and right coils can rotate around the hinge shaft 5.4. The induction heater 5 is installed on the support column 4.10 of the interlocking plate 4.3 through the hinge shaft 5.4. The right coil 5.1 and the left coil 5.2 are the same single-piece coil structure, and the lower part is a coil bending structure 5.5, and the coil bending structure 5.5 is shaped like the rail 1. The middle part of the single-piece coil structure is a hinge shaft 5.4 made of high-temperature resistant material, and the upper part of the single-piece coil structure is a straight rod structure. An extension section is also provided at the top of the straight rod structure, and the extension section extends along the horizontal front-back axis and in the direction close to the support rod 3.5. The extension section passes through the arc groove 4.9 of the interlocking plate 4.3, and moves in an arc shape in the arc groove 4.9 as the coil rotates, and forms a avoidance with the arc groove 4.9. The end of the extension section close to the support rod 3.5 is movably connected to the connecting rod 4.7.

[0031] The telescopic part of the telescopic rod 4.6 moves up and down in the vertical direction through the hydraulic principle, driving the connecting rod 4.7 to swing up and down. Since the other end of the connecting rod 4.7 is movably connected to the extension sections of the right coil 5.1 and the left coil 5.2, the up and down swinging of the connecting rod 4.7 can drive the upper extension sections of the two coils to swing up and down. The middle parts of the right coil 5.1 and the left coil 5.2 are connected to the embedded plate 4.3 through the hinge shaft 5.4. Therefore, when the up and down swinging of the connecting rod 4.7 is transmitted to the two coils, it can be converted into an arc-shaped reciprocating rotation of the two coils along the hinge shaft 5.4, thereby driving the induction heater 5 to open and close. When the lower ends of the two coils are in contact under the opening action, the coils form a closed loop, and the induction heater 5 is in a closed conduction state at this time. By connecting and conducting with the intermediate frequency generator 3.6, a closed heating loop of the induction heater 5 can be formed; when the lower ends of the two coils are not in contact under the opening action, the coils form an unclosed loop, and the induction heater 5 is in an unclosed and unconducting state at this time, thereby disconnecting the closed heating loop of the induction heater 5. Thus, the opening and closing of the induction heater 5 can be controlled by adjusting the telescopic rod 4.6, so as to achieve the control of the coils by mechanized means, avoid manual installation and disassembly, and save time and labor.

[0032] In addition, a terminal 5.3 is provided at the upper middle position of the left and right coils for energizing the coils to form a closed circuit and heat the rail weld.

[0033] Furthermore, the bending structure 5.5 of the lower coil of the two coils is made of copper material, and the terminal 4.3 and the upper part of the two coils are made of high temperature resistant ceramic material or other high temperature resistant non-electrical material to avoid short circuit after power is turned on and cause accidents. Another way is to wrap a layer of high temperature resistant insulating material on the surface of the coil, and the hinge shaft 5.4 must use high temperature resistant insulating material, and the contact position of the opening and closing point at the bottom of the coil is not wrapped, so that short circuit will not occur when power is turned on.

[0034] Preferably, a water circulation channel may be provided inside the coil to reduce the temperature of the coil during normalizing to prevent the coil from melting due to excessive temperature.

[0035] Embodiment 2: This embodiment provides a method for using the dual-frequency rail weld electromagnetic induction heating device according to the first embodiment, and the specific implementation method is as follows: Step S1, transporting a normalizing vehicle equipped with a dual-frequency rail weld electromagnetic induction heating device to a construction site.

[0036] Step S2, using the positioning device 6 to position the weld.

[0037] The camera identifies the weld and the laser light is irradiated on the middle of the weld.

[0038] Step S3, using the lifting device 3 to lower the embedding device 4 and the induction heater 5.

[0039] Step S4: the embedding plate 4.3 is stably embedded on the rail 1.

[0040] Step S5, using the telescopic rod 4.6 and the connecting rod 4.7 on the fitting device 4 to drive the induction heater 5 to close.

[0041] The right coil 5.1 and the left coil 5.2 slide in the arc-shaped through groove 4.9 of the embedded plate 4.3, driving the coils to open and close.

[0042] Step S6, after the coil is closed, current is passed through to perform normalizing operation.

[0043] Step S7, after normalizing is completed, open the coil and use the lifting device 3 to lift the induction heater 5 to complete the normalizing operation.

[0044] After the above work is completed, you can go to the next work point and start the next operation.

[0045] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solutions and novel concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dual-frequency rail weld electromagnetic induction heating device, characterized in that: include: A flatbed vehicle, the flatbed vehicle comprising: An upper top plate and a lower bottom plate are arranged in parallel and up and down, a plurality of pillars are arranged between the upper top plate and the lower bottom plate, an upper connecting pillar is arranged on the bottom surface of the upper top plate, and a lower connecting pillar is arranged on the upper surface of the lower bottom plate; The lifting device is installed at the front end of the flatbed truck and includes: The front axle and the rear axle are arranged parallel to each other, and the rear axle is rotatably matched with the through hole on the lower connecting column; one end of the hydraulic rod is rotatably matched with the upper connecting column through the connecting shaft, and the other end is rotatably matched with the front axle through the through hole at the end of the hydraulic rod; a plurality of support rods are movably matched with the front axle and the rear axle respectively to form a frame structure at the front end of the lifting device; The engaging device is arranged at the front end of the support rod and comprises: A mating plate, wherein the mating plate is fixedly connected to the front end of the support rod, a groove conforming to the shape of the rail is provided at the lower part of the mating plate for mating with the rail, and a plurality of arc-shaped through grooves are provided at the upper part of the mating plate; a support plate is transversely arranged in the middle part of the mating plate and arranged on a side surface of the mating plate close to the support rod; a telescopic rod is vertically arranged on the support plate, and the top end of the telescopic rod is rotatably matched with a plurality of connecting rods through a connecting shaft; a support column is arranged in the middle part of the mating plate and arranged on a side surface of the mating plate away from the support rod; The induction heater is arranged on a supporting column and comprises: The left coil and the right coil are an open-and-close coil structure of the same shape and size. The lower part of the coil structure is a bending structure that imitates the shape of the rail, the middle part is provided with a hinge shaft, and the top is provided with a transmission rod that extends horizontally front and rear. The transmission rod passes through an arc-shaped through groove and rotates with the connecting rod. The left coil and the right coil are symmetrically arranged, and the middle part is movably coordinated with the support column through the hinge shaft, so that the left coil and the right coil can perform lever movement with the hinge shaft as the fulcrum under the drive of the connecting rod, and cooperate to form the opening and closing movement of the coil structure.

2. A dual-frequency rail weld electromagnetic induction heating device as claimed in claim 1, characterized in that: The bottom surface of the lower base plate is provided with: a plurality of running wheels; a positioning device, the positioning device comprises an L-shaped support rod, one end of the L-shaped support rod is fixedly connected to the bottom surface of the lower base plate, and the other end is provided with a plurality of laser lights and a plurality of cameras.

3. A dual-frequency rail weld electromagnetic induction heating device as claimed in claim 1, characterized in that: The support rod is a step-shaped bending structure, a through hole is provided at the rear end of the support rod for rotationally cooperating with the rear axle, and a through hole is provided at the step-shaped bending corner of the step-shaped bending structure for rotationally cooperating with the front axle.

4. A dual-frequency rail weld electromagnetic induction heating device as claimed in claim 1, characterized in that: The support rod is also provided with: a plurality of mounting plates, on which intermediate frequency generators are arranged; and a plurality of branch rings, in which electric wires and water circulation channels are passed, for forming position limits for the electric wires and the water circulation channels.

5. A dual-frequency rail weld electromagnetic induction heating device as claimed in claim 1, characterized in that: A fixing ring is also provided above the support plate and on one side of the engaging plate close to the support rod. The fixing ring is sleeved and matched with the telescopic rod to achieve position limiting of the telescopic rod.

6. A dual-frequency rail weld electromagnetic induction heating device as claimed in claim 1, characterized in that: The embedded plate is also provided with a wire outlet hole, so that the wires and the water circulation channel pass through the wire outlet hole to be conductively connected with the left coil and the right coil.

7. A dual-frequency rail weld electromagnetic induction heating device as claimed in claim 1, characterized in that: The hinge shaft is made of insulating high temperature resistant material.

8. A dual-frequency rail weld electromagnetic induction heating device as claimed in claim 1, characterized in that: The left coil or the right coil is provided with a terminal head for conducting and connecting with the electric wire and the water circulation passage.

9. A method for using the electromagnetic induction heating device according to any one of claims 1 to 8, characterized in that: The specific implementation is as follows: Step S1, transporting a normalizing vehicle equipped with a dual-frequency rail weld electromagnetic induction heating device to a construction site; Step S2, using a positioning device to position the weld; The camera identifies the weld and the laser light shines on the middle of the weld; Step S3, using a lifting device to lower the embedding device and the induction heater; Step S4, the embedded plate is stably embedded on the rail; Step S5, using the telescopic rod and the connecting rod on the engaging device to drive the induction heater to close; The right coil and the left coil slide in the arc-shaped through groove of the interlocking plate, driving the coils to open and close; Step S6, after the coil is closed, current is passed through to perform normalizing operation; Step S7, after normalizing is completed, open the coil and use the lifting device to lift the induction heater to complete the normalizing operation; after the above work is completed, you can go to the next work point and start the next operation.

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