Compact heat treatment device of steel rail flash welding and normalizing all-in-one machine

Abstract

The utility model belongs to the technical field of railway engineering mechanical equipment manufacturing, and particularly relates to a compact heat treatment device of a steel rail flash welding and normalizing all-in-one machine, which comprises a heat treatment device fixing frame and a water inlet and outlet water cooling structure connected with the heat treatment device fixing frame, each mold closing oil cylinder is hinged to one coil mold base, one coil mold base is provided with a left heat treatment coil, the other coil mold base is provided with a right heat treatment coil, and rail top air spraying openings and rail bottom air outlets are formed in the bottoms of the coil mold bases. And a rail top optical fiber temperature sensor and a rail bottom optical fiber temperature sensor are respectively fixed on the heat treatment device fixing frame. The optical fiber temperature sensor is adopted as the temperature sensor, high precision and high sensitivity are achieved, meanwhile, the anti-electromagnetic interference capacity is achieved, the heat treatment temperature can be accurately detected, meanwhile, air spraying can be accurately controlled through temperature detection, and therefore the stability of the steel rail heat treatment quality is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway engineering machinery and equipment manufacturing, in particular to a compact heat treatment device for a rail flash welding and normalizing integrated machine. Background Art

[0002] According to the post-weld heat treatment requirements of "TB / T1632.2-2014 Rail Welding Part 2: Flash Welding," when medium-frequency induction heating is used for rail welded joints, the starting temperature should be below 500°C (rail head surface), and the rail head heating temperature should be 900°C ± 20°C. The rail foot heating temperature should be between 800°C and 850°C (rail foot temperature measurement should be within 10mm inward from the rail foot edge). When using a gas pressure welding heater with an oscillating flame, the starting temperature should be below 500°C (rail head surface), the heating width should be 50mm + 10mm, and the heating temperature should be between 850°C and 950°C. Rail head underquenching should be cooled by jetting compressed air.

[0003] The latest Chinese invention patent, CN116551137A, provides a suspended rail flash welding and induction heat treatment system. This system involves a suspended induction heat treatment system positioned at the junction between the center axis A of the movable frame clamping mechanism and the center axis B of the stationary frame clamping mechanism. The induction heat treatment system is moved to the weld seam via a translation mechanism and begins to spray air. Once the weld temperature drops to a certain level, the heating coil begins induction heating the weld seam. Once heating is complete, air is sprayed again to lower the weld temperature to the required level. The rail top and rail bottom temperature sensors are mounted on the heat treatment normalizing coil die base. Each coil of the heat treatment normalizing coil is hollow, connected to a water channel block at each end. Finally, the air inlet and outlet of the system are integrated directly into the heat treatment normalizing coil die base.

[0004] Although the structure of the above patent has a rail top temperature sensor and a rail bottom temperature sensor, the traditional temperature sensor is affected by electromagnetic interference, resulting in inaccurate temperature measurement. During the heat treatment process, the temperature sensor monitors the heat treatment temperature and controls the air spray in real time, which affects the heat treatment quality.

[0005] Secondly, the heat treatment equipment has a water channel block on the left and right sides of the transformer, which circulates water to the normalizing coils on both sides. This requires two inlets and two outlets for water cooling, resulting in a large number of pipes and an incompact structure. At the same time, since the heat treatment heats the rails to a maximum of over 900°C, the heat radiation also heats the heat treatment normalizing coil die base. However, the heat treatment normalizing coil die base has no water cooling channel, resulting in a high temperature of the heat treatment normalizing coil die base. Long-term high-temperature use of the heat treatment normalizing coil die base will reduce its service life, ultimately affecting the normal use of the heat treatment machine.

[0006] In addition, the heat treatment normalizing coil mold base is integrated with an air jet outlet and an air jet inlet. It can be seen from the patent drawings that the air jet outlet is only available on the upper part, that is, only the top of the rail is subjected to air jet cooling. The single rail top air jet results in uneven cooling of the rail welding joint, which may cause internal stress and deformation, as well as limited local performance improvement. At the same time, the heat treatment normalizing coil mold base has no water cooling, resulting in a high temperature of the heat treatment normalizing coil mold base. When compressed air passes through the heat treatment normalizing coil mold base to spray cool the rail, it may heat the compressed air, thereby prolonging the air cooling time. Summary of the Invention

[0007] In order to solve the above-mentioned problems existing in the prior art, the present application provides a compact rail heat treatment device on a mobile rail flash welding and normalizing machine.

[0008] To achieve the above technical effects, the technical solutions of this application are as follows:

[0009] A compact heat treatment device for a rail flash welding and normalizing machine includes a heat treatment device fixing frame and an inlet and outlet water cooling structure connected thereto. A mold clamping cylinder is provided on both sides of the heat treatment device fixing frame. Each mold clamping cylinder is hinged to a coil mold base. One coil mold base is provided with a left heat treatment coil, and the other coil mold base is provided with a right heat treatment coil. A rail top air nozzle and a rail bottom air outlet are provided at the bottom of the coil mold base. A rail top optical fiber temperature sensor and a rail bottom optical fiber temperature sensor are fixed to the left and right sides of the heat treatment device fixing frame, respectively.

[0010] Furthermore, a transformer is provided on the fixed frame of the heat treatment device, and the water inlet water channel block and the water outlet water channel block of the one-inlet and one-outlet water cooling structure are fixed on the left and right sides of the transformer, the water inlet of the coil mold base is connected to the water inlet water channel block, the water inlet of the coil mold base and the water outlet of the coil mold base are respectively connected to the water inlets of the left heat treatment coil and the right heat treatment coil, and the water outlets of the left heat treatment coil and the right heat treatment coil are connected to the water outlet water channel block.

[0011] Furthermore, the mold closing cylinder is hinged to the mold closing cylinder mounting seat, and the mold closing cylinder mounting seat is fixedly mounted on both sides of the fixing frame of the heat treatment device.

[0012] Furthermore, the transformer is connected to the upper portion of the heat treatment device fixing frame, and the lower portion of the transformer is connected to the left heat treatment coil and the right heat treatment coil respectively through a bus bar.

[0013] Furthermore, a horizontally movable connecting seat is connected to the front side of the heat treatment device fixing frame.

[0014] Furthermore, the heat treatment device translation guide sleeves are fixed to the left and right sides of the heat treatment device fixing frame by screws, and the heat treatment device translation guide sleeves are connected to the heat treatment device translation guide rod slag stop cover.

[0015] Furthermore, a left mold base air inlet connector and a right mold base air inlet connector are respectively fixed on the two coil mold bases.

[0016] Furthermore, the left heat treatment coil and the right heat treatment coil are hollow.

[0017] Furthermore, the transformer slag cover is fixed to the rear side of the transformer, the fixing frame slag cover is fixed to the rear side of the heat treatment device fixing frame, and the heat treatment coil slag cover is fixed to the coil mold base.

[0018] Furthermore, an air jet inlet is provided on the side of the coil mold base, a plurality of rail top air jet outlets are vertically provided on the upper part of the coil mold base, and a plurality of rail bottom air jet outlets are horizontally provided on the bottom of the coil mold base. The air jet inlet is connected to the rail top air jet outlet and the rail bottom air jet outlet inside the coil mold base to form an air path.

[0019] The working steps of this application are as follows:

[0020] Step 1: The mold clamping cylinder extends, the coil is clamped around the rail, and the horizontal transverse movement mechanism and the horizontal transverse movement connecting seat are connected to the heat treatment translation guide sleeve. The compact rail heat treatment device of the present application is pushed from the initial position to the weld to be heat treated. The data detected by the rail top optical fiber temperature sensor and the rail bottom optical fiber temperature sensor are used to determine whether air spray treatment is required through the electrical system. If not, the left and right heat treatment coils perform induction heating on the weld. If required, the air spray is turned on. After the temperature drops to a certain temperature, the air spray is stopped, and the left and right heat treatment coils perform induction heating on the weld.

[0021] Step 2: After heating is completed, spray air again to reduce the weld temperature to the process requirements;

[0022] Step 3: After the weld temperature drops to the process requirements, stop the air spray, retract the heat treatment device to its initial position, retract the mold cylinder, open the coil, and the heat treatment weld is completed.

[0023] The advantages of this application are:

[0024] 1. The temperature sensor of the present application adopts an optical fiber temperature sensor, which has high precision, high sensitivity, and anti-electromagnetic interference capability, so that it can accurately detect the heat treatment temperature and accurately control the air injection through temperature detection, thereby ensuring the stability of the heat treatment quality of the rail.

[0025] 2. This application optimizes the pipeline connection method, optimizing the original two-inlet and two-point water cooling method into one-inlet and one-outlet. At the same time, a water cooling channel is added to the coil mold base, which reduces the working temperature of the coil mold base. At the same time, since the coil mold base has a water channel and can be directly connected to the coil through a silicone tube through the water outlet of the coil mold base, the use of pipelines is further reduced, making the equipment more compact and simple.

[0026] 3. The coil die base of the present application has added rail bottom air injection holes, so that the rail top and rail bottom of the rail welding joint are evenly cooled, reducing the internal stress and deformation of the weld, while improving the hardness and wear resistance of the rail top and rail bottom. The rail waist is naturally cooled and has a lower hardness, which ensures the good plasticity and toughness of the rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1-Figure 2 This is a schematic diagram of the compact rail heat treatment machine's front-side clamping and back-side opening structure.

[0028] Figure 3-Figure 5 This is a schematic diagram of the water and air channels inside the coil mold base.

[0029] In the accompanying drawings: 1-heat treatment device fixing frame, 2-heat treatment device bus, 3-transformer, 4-water inlet waterway block, 5-water outlet waterway block, 6-air jet diverter block, 7-rail top optical fiber temperature sensor, 8-rail bottom optical fiber temperature sensor, 9-horizontal transverse connection seat, 10-right mold base air inlet connector, 11-right heat treatment coil, 12-left heat treatment coil, 13-left mold base air inlet connector, 14-coil mold base, 15-mold closing cylinder, 16-heat treatment device translation guide sleeve, 17-heat treatment device translation guide rod slag cover, 18-transformer slag cover, 19-fixed frame slag cover, 20-heat treatment coil slag cover, 21-mold closing cylinder mounting seat. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of this application, it should be noted that the terms "upper," "vertical," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0035] Example 1

[0036] like Figure 1 and Figure 2 As shown, a compact heat treatment device for a rail flash welding and normalizing machine includes a heat treatment device fixing frame 1 and an inlet and outlet water cooling structure connected thereto, wherein mold clamping cylinders 15 are provided on both sides of the heat treatment device fixing frame 1, and each mold clamping cylinder 15 is hinged to a coil mold base 14, wherein one coil mold base 14 is provided with a left heat treatment coil 12, and the other coil mold base 14 is provided with a right heat treatment coil 11, and a rail top air nozzle and a rail bottom air outlet are provided at the bottom of the coil mold base 14, and a rail top optical fiber temperature sensor 7 and a rail bottom optical fiber temperature sensor 8 are fixed on the left and right sides of the heat treatment device fixing frame 1 respectively.

[0037] A transformer 3 is provided on the fixed frame 1 of the heat treatment device, and the one-inlet and one-outlet water cooling structure has an inlet water channel block 4 and an outlet water channel block 5. The inlet water channel block 4 and the outlet water channel block 5 are fixed on the left and right sides of the transformer 3. The water inlet of the coil mold base 14 is connected to the inlet water channel block 4, and the water inlet of the coil mold base 14 and the water outlet of the coil mold base 14 are respectively connected to the water inlets of the left heat treatment coil 12 and the right heat treatment coil 11 through insulating silicone tubes. The water outlets of the left heat treatment coil 12 and the right heat treatment coil 11 are connected to the outlet water channel block 5.

[0038] The rail top optical fiber temperature sensor 7 is fixed on the left side of the heat treatment device fixing frame 1 by bending the sheet metal, and the rail top optical fiber temperature sensor 8 is also fixed on the right side of the heat treatment device fixing frame 1 by bending the sheet metal. Figure 1 As shown in the figure, the rail top optical fiber temperature sensor 7 and the rail bottom optical fiber temperature sensor 8 are both blocked, so they are shown in a partial cross-sectional view. They are both fixed on the fixing frame 1 of the heat treatment device.

[0039] The water cooling structure is optimized from the two-inlet and two-outlet mode of the existing technology to one-inlet and one-outlet. Compared with the existing technology, after optimization to one-inlet and one-outlet, the water inlet waterway block 4 is fixed on the left side of the transformer, and the water outlet waterway block 5 is fixed on the left side of the transformer 3. After the water inlet waterway block 4 is connected through a hose, the water channel is connected to each component that requires cooling water circulation through the water diversion joint on the water inlet waterway block 4. Some components can be directly connected in series through the hose to form a water circulation loop. The water circulation outlet of each component is connected to the water diversion joint on the water outlet waterway block 5 through a hose to form a water channel. Finally, the outlet water is collected and the circulating water is sent out through the outlet hose.

[0040] The air duct outlets on the coil die base 14 should be positioned away from the right-hand heat treatment coil 11 and the left-hand heat treatment coil 12 installed on the coil die base 14. All internal air ducts must be connected to the air duct, avoiding cracks in the air duct and the water duct that could connect them. The rail top air ducts must avoid the rail waist, strictly ensuring that air cooling is only applied to the top and bottom of the rail.

[0041] The temperature sensor of the present application adopts an optical fiber temperature sensor, which has high precision, high sensitivity, and anti-electromagnetic interference capability, so that it can accurately detect the heat treatment temperature and accurately control the air injection through temperature detection, thereby ensuring the stability of the heat treatment quality of the rail.

[0042] Example 2

[0043] like Figure 1 and Figure 2As shown, a compact heat treatment device for a rail flash welding and normalizing machine includes a heat treatment device fixing frame 1 and an inlet and outlet water cooling structure connected thereto, wherein mold clamping cylinders 15 are provided on both sides of the heat treatment device fixing frame 1, and each mold clamping cylinder 15 is hinged to a coil mold base 14, wherein one coil mold base 14 is provided with a left heat treatment coil 12, and the other coil mold base 14 is provided with a right heat treatment coil 11, and a rail top air nozzle and a rail bottom air outlet are provided at the bottom of the coil mold base 14, and a rail top optical fiber temperature sensor 7 and a rail bottom optical fiber temperature sensor 8 are fixed on the left and right sides of the heat treatment device fixing frame 1 respectively.

[0044] A transformer 3 is provided on the fixed frame 1 of the heat treatment device, and the one-inlet and one-outlet water cooling structure has an inlet water channel block 4 and an outlet water channel block 5. The inlet water channel block 4 and the outlet water channel block 5 are fixed on the left and right sides of the transformer 3. The water inlet of the coil mold base 14 is connected to the inlet water channel block 4, and the water inlet of the coil mold base 14 and the water outlet of the coil mold base 14 are respectively connected to the water inlets of the left heat treatment coil 12 and the right heat treatment coil 11 through insulating silicone tubes. The water outlets of the left heat treatment coil 12 and the right heat treatment coil 11 are connected to the outlet water channel block 5.

[0045] The rail top optical fiber temperature sensor 7 is fixed on the left side of the heat treatment device fixing frame 1 by bending the sheet metal, and the rail top optical fiber temperature sensor 8 is also fixed on the right side of the heat treatment device fixing frame 1 by bending the sheet metal. Figure 1 As shown in the figure, the rail top optical fiber temperature sensor 7 and the rail bottom optical fiber temperature sensor 8 are both blocked, so they are shown in a partial cross-sectional view. They are both fixed on the fixing frame 1 of the heat treatment device.

[0046] The water cooling structure is optimized from the two-inlet and two-outlet mode of the existing technology to one-inlet and one-outlet. Compared with the existing technology, after optimization to one-inlet and one-outlet, the water inlet waterway block 4 is fixed on the left side of the transformer, and the water outlet waterway block 5 is fixed on the left side of the transformer 3. After the water inlet waterway block 4 is connected through a hose, the water channel is connected to each component that requires cooling water circulation through the water diversion joint on the water inlet waterway block 4. Some components can be directly connected in series through the hose to form a water circulation loop. The water circulation outlet of each component is connected to the water diversion joint on the water outlet waterway block 5 through a hose to form a water channel. Finally, the outlet water is collected and the circulating water is sent out through the outlet hose.

[0047] The mold clamping cylinder 15 is hinged to a mold clamping cylinder mounting seat 21 , and the mold clamping cylinder mounting seat 21 is fixedly mounted on both sides of the fixing frame 1 of the heat treatment device.

[0048] The transformer 3 is connected to the upper portion of the heat treatment device fixing frame 1 , and the lower portion of the transformer 3 is connected to the left heat treatment coil 12 and the right heat treatment coil 11 via bus bars.

[0049] The front side of the heat treatment device fixing frame 1 is connected with a horizontally movable connecting seat 9 by screws.

[0050] The heat treatment device translation guide sleeves 16 are fixed to the left and right sides of the heat treatment device fixing frame 1 by screws, and the heat treatment device translation guide sleeves 16 are connected to the heat treatment device translation guide rod slag blocking cover 17 by screws.

[0051] The two coil mold bases 14 are respectively fixed with a left mold base air inlet connector 13 and a right mold base air inlet connector 10 .

[0052] The left heat treatment coil 12 and the right heat treatment coil 11 are hollow.

[0053] The transformer slag stop cover 18 is fixed to the rear side of the transformer 3 , the fixed frame slag stop cover 19 is fixed to the rear side of the heat treatment device fixed frame 1 , and the heat treatment coil slag stop cover 20 is fixed to the coil die base 14 .

[0054] An air jet inlet is provided on the side of the coil mold base 14, and a plurality of rail top air jet outlets are vertically provided on the upper part of the coil mold base 14. A plurality of rail bottom air jet outlets are horizontally provided on the bottom of the coil mold base 14. The air jet inlet is connected to the rail top air jet outlet and the rail bottom air jet outlet inside the coil mold base 14 to form an air path.

[0055] The air duct outlets on the coil die base 14 should be positioned away from the right-hand heat treatment coil 11 and the left-hand heat treatment coil 12 installed on the coil die base 14. All internal air ducts must be connected to the air duct, avoiding cracks in the air duct and the water duct that could connect them. The rail top air ducts must avoid the rail waist, strictly ensuring that air cooling is only applied to the top and bottom of the rail.

[0056] The working steps of this application are as follows:

[0057] Step 1: The mold clamping cylinder extends, the coil is clamped around the rail, and the horizontal transverse movement mechanism and the horizontal transverse movement connecting seat are connected to the heat treatment translation guide sleeve. The compact rail heat treatment device of the present application is pushed from the initial position to the weld to be heat treated. The data detected by the rail top optical fiber temperature sensor and the rail bottom optical fiber temperature sensor are used to determine whether air spray treatment is required through the electrical system. If not, the left and right heat treatment coils perform induction heating on the weld. If required, the air spray is turned on. After the temperature drops to a certain temperature, the air spray is stopped, and the left and right heat treatment coils perform induction heating on the weld.

[0058] Step 2: After heating is completed, spray air again to reduce the weld temperature to the process requirements;

[0059] Step 3: After the weld temperature drops to the process requirements, stop the air spray, retract the heat treatment device to its initial position, retract the mold cylinder, open the coil, and the heat treatment weld is completed.

[0060] The temperature sensor of the present application adopts an optical fiber temperature sensor, which has high precision, high sensitivity, and anti-electromagnetic interference capability, so that it can accurately detect the heat treatment temperature and accurately control the air injection through temperature detection, thereby ensuring the stability of the heat treatment quality of the rail.

[0061] This application optimizes the pipe connection method, optimizing the original two-inlet and two-point water cooling method to one-inlet and one-outlet. At the same time, a water cooling channel is added to the coil mold base, which reduces the temperature of the coil mold base during operation. At the same time, because the coil mold base has a water channel and can be directly connected to the coil through a silicone tube through the coil mold base water outlet, the use of pipes is further reduced, making the equipment more compact and simple. The coil mold base of this application adds rail bottom air holes to the rail bottom, so that the top and bottom of the rail welded joint are evenly cooled, reducing the internal stress and deformation of the weld, while improving the hardness and wear resistance of the top and bottom of the rail. The rail waist is naturally cooled, with a lower hardness, which ensures the good plasticity and toughness of the rail.

Claims

1. A compact heat treatment device for rail flash welding and normalizing, characterized by: The invention comprises a heat treatment device fixing frame (1) and an inlet and outlet water cooling structure connected thereto, wherein a mold clamping cylinder (15) is provided on both sides of the heat treatment device fixing frame (1), and each mold clamping cylinder (15) is hinged to a coil mold base (14), wherein one coil mold base (14) is provided with a left heat treatment coil (12), and the other coil mold base (14) is provided with a right heat treatment coil (11), and a rail top air outlet and a rail bottom air outlet are provided at the bottom of the coil mold base (14), and a rail top optical fiber temperature sensor (7) and a rail bottom optical fiber temperature sensor (8) are fixed on the left and right sides of the heat treatment device fixing frame (1), respectively.

2. The compact heat treatment device for rail flash welding and normalizing according to claim 1, characterized in that: A transformer (3) is provided on the heat treatment device fixing frame (1), and the one-inlet-one-outlet water cooling structure includes a water inlet waterway block (4) and a water outlet waterway block (5). The water inlet waterway block (4) and the water outlet waterway block (5) are fixed on the left and right sides of the transformer (3). The water inlet of the coil mold base (14) is connected to the water inlet waterway block (4). The water inlet of the coil mold base (14) and the water outlet of the coil mold base (14) are respectively connected to the water inlets of the left heat treatment coil (12) and the right heat treatment coil (11). The water outlets of the left heat treatment coil (12) and the right heat treatment coil (11) are connected to the water outlet waterway block (5).

3. The compact heat treatment device for rail flash welding and normalizing according to claim 1, characterized in that: The mold closing cylinder (15) is hinged to the mold closing cylinder mounting seat (21), and the mold closing cylinder mounting seat (21) is fixedly mounted on both sides of the heat treatment device fixing frame (1).

4. The compact heat treatment device for rail flash welding and normalizing according to claim 2, characterized in that: The transformer (3) is connected to the upper portion of the heat treatment device fixing frame (1), and the lower portion of the transformer (3) is connected to the left heat treatment coil (12) and the right heat treatment coil (11) via a bus bar.

5. The compact heat treatment device for rail flash welding and normalizing according to claim 1, characterized in that: The front side of the heat treatment device fixing frame (1) is connected to a horizontally movable connecting seat (9).

6. The compact heat treatment device for rail flash welding and normalizing according to claim 1, characterized in that: The heat treatment device fixing frame (1) is fixed with heat treatment device translation guide sleeves (16) on the left and right sides by screws, and the heat treatment device translation guide sleeves (16) and the heat treatment device translation guide rod slag blocking cover (17) are connected to each other.

7. The compact heat treatment device for rail flash welding and normalizing according to claim 1, characterized in that: A left mold base air inlet connector (13) and a right mold base air inlet connector (10) are respectively fixed to the two coil mold bases (14).

8. The compact heat treatment device for rail flash welding and normalizing according to claim 1, characterized in that: The left heat treatment coil (12) and the right heat treatment coil (11) are hollow.

9. The compact heat treatment device for rail flash welding and normalizing according to claim 1, characterized in that: The transformer slag shield (18) is fixed to the rear side of the transformer (3), the fixed frame slag shield (19) is fixed to the rear side of the heat treatment device fixed frame (1), and the heat treatment coil slag shield (20) is fixed to the coil die base (14).

10. The compact heat treatment device for rail flash welding and normalizing according to claim 1, characterized in that: An air jet inlet is provided on the side of the coil mold base (14), a plurality of rail top air jet outlets are vertically provided on the upper part of the coil mold base (14), and a plurality of rail bottom air jet outlets are horizontally provided on the bottom of the coil mold base (14), and the air jet inlet is connected to the rail top air jet outlet and the rail bottom air jet outlet inside the coil mold base (14) to form an air path.

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