Steel rail heating sensor with adjustable axial temperature uniformity

Abstract

The utility model discloses a steel rail heating inductor with adjustable axial temperature uniformity, which comprises a heating outer cover, a base metal induction heating coil, a transition section induction heating coil, a forming section induction heating coil and a heel induction heating coil, the outer wall of one side of the heating outer cover is provided with a feeding port right opposite to the four sets of coil modules. The induction heating device further comprises three adjustable connecting copper bars, a coil extension copper pipe and a main output copper bar. The base metal induction heating coil, the transition section induction heating coil, the forming section induction heating coil and the heel induction heating coil are connected in series through the three adjustable connecting copper bars and then electrically connected with the main output copper bar through the coil extension copper pipe. The mode of a heating area can be dynamically adjusted according to different rail shapes, so that the rail is uniformly heated, the length of a heat affected area is shortened, and the stability and repeatability of the overall heat treatment quality of a turnout are improved.

Description

Technical Field

[0001] The utility model relates to a rail heating inductor with adjustable axial temperature uniformity, belonging to the technical field of rail heat treatment. Background Art

[0002] The rail turnout consists of three parts: the forming section, the transition section, and the parent material. It is used to realize track replacement. Its heel end is connected to the ordinary AT rail, so it needs to be heat treated to form the rail section. The heel end of the rail needs to be heated as a whole, forged once, and naturally cooled to form a rail turnout, and then heated and normalized for a second time. Before forging, the heel end of the rail needs to heat the rail parent material so that the 1.8-meter length of the heel end is evenly heated to 1100 degrees, so that the heel end of the rail reaches the forging temperature, and then forged, and then the heel end of the rail is cooled to room temperature to form a turnout, and then the forged turnout is heated to 960 degrees for a second time for normalizing. Since the hardness of the rail decreases after being forged into a turnout, and the heat-affected zone covers the formed section and the cold rail base material section after forging, and the cross-sectional shapes of the transition section at the heel end of the rail are different in different places, it is necessary to adopt a method that can dynamically adjust the heating area according to the different rail shapes, so that the rail is heated evenly and the length of the heat-affected zone is shortened, thereby improving the stability and repeatability of the overall heat treatment quality of the turnout.

[0003] Existing, railroad turnout heating usually uses oven heating or induction heating methods. The heating temperature of the oven heating method is uniform, but the heating time is long, and batches need to be heated in the furnace, which cannot achieve assembly line automated production and single-piece quality control. Another heating method is induction heating, which generally uses a fixed non-adjustable tunnel spiral inductor, that is, an alternating medium-frequency current is passed through the profiling coil to generate a medium-frequency magnetic field in the induction coil, and then the heel of the rail is placed in the medium-frequency magnetic field in the induction coil. The surface of the rail will sense a large induced electromotive force, thereby forming eddy currents on the surface of the rail, and finally the surface of the rail will heat up. Although it can also be used as a heating method, due to the large number of rail turnout sizes and the need for the same inductor to be compatible with turnouts of all sizes, especially the transition section is prone to uneven temperature and the temperature length of the transition section is easily extended, so that the hardness performance of the turnout does not meet the standard.

[0004] Although both of the above methods can be used as heating methods, due to the large number of rail switch sizes, special shapes and frequent changes, traditional ovens are only suitable for large-scale centralized heat treatment of the same model. The production of small batches and multiple models of switches consumes huge energy. The oven needs to be turned on and off half an hour in advance each time. Although the fixed sensor uses the principle of electromagnetic induction, it is necessary to replace the corresponding fixed induction coil according to the different sizes and models of switches. The changeover work is intensive and the leakage magnetic field is prone to poor repeatability. Therefore, the use of traditional ovens and fixed sensors will result in high energy consumption, poor compatibility, poor stability, low heating efficiency and other problems, which reduces production capacity and quality, and there is room for improvement. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the use of traditional ovens and fixed sensors to heat rail turnouts will result in high energy consumption, poor compatibility, poor stability, low heating efficiency and other problems, which reduces production capacity and quality.

[0006] In order to solve the above technical problems, the utility model provides a rail heating sensor with adjustable axial temperature uniformity, which can change the magnetic induction intensity in different axial areas to improve the axial temperature uniformity of the rail switch, effectively shorten the heat affected zone of the transition section, and improve work efficiency and product quality.

[0007] In order to achieve the above technical objectives and the above technical effects, this application is implemented through the following technical solutions:

[0008] A rail heating inductor with adjustable axial temperature uniformity, comprising a heating outer cover, a base material induction heating coil, a transition section induction heating coil, a forming section induction heating coil and a heel induction heating coil, a feed port is provided on an outer wall of one side of the heating outer cover, the base material induction heating coil, the transition section induction heating coil, the forming section induction heating coil and the heel induction heating coil are electrically connected in sequence in a direction away from the feed port and are all directly opposite to the feed port, and an adjustment component for adjusting the mutual spacing between the base material induction heating coil, the transition section induction heating coil, the forming section induction heating coil and the heel induction heating coil is provided in the heating outer cover;

[0009] It also includes an adjustable connecting copper bar, a coil extension copper tube and a main output copper bar. Three adjustable connecting copper bars are provided. The base material induction heating coil, the transition section induction heating coil, the forming section induction heating coil and the heel induction heating coil are connected in series through the three adjustable connecting copper bars and then electrically connected to the main output copper bar through the coil extension copper tube.

[0010] Preferably, the adjustment component includes a coil positioning copper screw, a waist groove fixing strip 1, a coil supporting foot and a waist groove fixing strip 2, and the two side surfaces and the top surface of each circle of the pipe of the parent material induction heating coil, the transition section induction heating coil, the forming section induction heating coil and the heel induction heating coil are welded with the coil positioning copper screw, and the multiple coil positioning copper screws on the side surfaces of the parent material induction heating coil, the transition section induction heating coil, the forming section induction heating coil and the heel induction heating coil are integrally fixed by the waist groove fixing strip 1, the waist groove fixing strip 1 is fixed to the inner wall of the heating outer cover through the coil supporting foot, and the multiple coil positioning copper screws on the top are integrally fixed by the waist groove fixing strip 2.

[0011] Furthermore, two temperature measuring holes 1 are provided on the waist groove fixing strip 2, and the two temperature measuring holes 1 correspond to the transition section induction heating coil and the forming section induction heating coil area respectively. Two waist-shaped temperature measuring holes 2 are provided on the top of the heating cover corresponding to the two temperature measuring holes 1. A transition section infrared temperature measuring probe and a forming section infrared temperature measuring probe are arranged on the top of the heating cover, which are directly opposite to the two temperature measuring holes 2.

[0012] Preferably, an inner insulation layer is provided in the heating outer cover corresponding to the feed port, the rail extends into the inner insulation layer through the feed port, the base material induction heating coil, the transition section induction heating coil, the forming section induction heating coil and the heel induction heating coil are all wound around the outside of the inner insulation layer, and a quartz plate layer is provided on the inner wall of the inner insulation layer.

[0013] Preferably, the heating outer cover comprises an insulating main bottom plate, stainless steel side plates, a stainless steel top plate, a feed end magnetic field shielding plate and a root magnetic field shielding plate; the feed end magnetic field shielding plate is detachably arranged on the insulating main bottom plate and is located on the side of the parent material induction heating coil away from the heel induction heating coil; the feed port is opened on the feed end magnetic field shielding plate; the root magnetic field shielding plate is detachably arranged on the insulating main bottom plate and is located on the side of the heel induction heating coil away from the parent material induction heating coil; two stainless steel side plates are provided; the stainless steel top plate and the two stainless steel side plates cooperate with the insulating main bottom plate, the feed end magnetic field shielding plate and the root magnetic field shielding plate to achieve packaging.

[0014] Preferably, a water distributor is provided in the heating outer cover, and the water distributor is connected to an external water source. The base material induction heating coil, the transition section induction heating coil, the forming section induction heating coil and the heel induction heating coil are all provided with coil quick-twist water interfaces, and the four coil quick-twist water interfaces are all connected to the water distributor through a hose.

[0015] Preferably, the base material induction heating coil, transition section induction heating coil, forming section induction heating coil and heel induction heating coil are all water-cooled copper tubes wound in parallel to form a trapezoidal profiled spiral induction coil.

[0016] Preferably, the heating outer cover is detachably provided with an infrared thermometer on the top wall at the feed inlet end and the end away from the feed inlet.

[0017] The utility model provides a rail heating inductor with adjustable axial temperature uniformity, which has the following advantages:

[0018] 1. When the utility model is used, four groups of copper tube spiral module induction coils of different sizes are connected in series for simultaneous heating. A base material induction heating coil, a forming section induction heating coil, a heel induction heating coil and a transition section induction heating coil are used, that is, the four module coils are coaxially heated simultaneously, and the relative positions of the four module coils can be adjusted. At the same time, a plurality of coil positioning copper screws are welded on each module coil and are fixed as a whole through waist groove fixing strips 1 and 2, so that the axial temperature uniformity of the rail branch can be fine-tuned, the axial heating temperature is uniform, the heating length of the transition section is effectively shortened, and the work efficiency is improved; at the same time, the transition section is magnetically guided and a shielding plate is set at the junction of the transition section and the base material to constrain the leakage magnetic field, so that the heating temperature of the rail branch is more uniform, and the heat affected zone of the transition section can be effectively shortened, and the work efficiency and product quality are improved.

[0019] 2. When the utility model is used, double temperature measuring holes are provided at the transition section and the forming section at the top of the sensor, and the temperature of different areas of the turnout can be monitored in real time through the temperature measuring holes. At the same time, infrared thermometers are also installed at both ends of the heating sensor to detect the temperature of the parent material at the end of the turnout and the feed port, so as to facilitate online monitoring of the axial temperature of different areas. When the temperature difference between different heating zones is too large, the heat preservation can be automatically performed evenly, so that the temperature of different axial areas can be controlled to ensure that the overall heating temperature of the rail turnout is uniform, and to prevent the occurrence of local excessively high and low temperatures during the heating process.

[0020] 3. When the utility model is used, a water-cooled copper tube is used to wind the induction coil, the water-cooled copper tube coil is wrapped around the inner insulation layer, and a quartz plate layer of hard material is added to the inner wall of the inner insulation layer to slow down the heat radiation of the rail to the outside world and increase the stability of the constant temperature environment inside the coil.

[0021] 4. The utility model provides a rail heating sensor with adjustable axial temperature uniformity, and the water-cooled copper tube induction coil adopts a trapezoidal design, which can reduce the magnetic leakage of the coil and improve the energy conversion efficiency of the induction coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an axial side schematic diagram of the overall structure of a rail heating sensor with adjustable axial temperature uniformity, which is mainly embodied in the utility model;

[0023] Figure 2 This is an axial schematic diagram of the internal structure of a rail heating sensor with adjustable axial temperature uniformity, which is mainly embodied in the utility model;

[0024] Figure 3 This is an axial schematic diagram of the rail heating induction coil structure mainly embodied in the utility model;

[0025] Figure 4 The utility model mainly embodies a side cross-sectional schematic diagram of the overall structure of a rail heating sensor with adjustable axial temperature uniformity;

[0026] In the figure:

[0027] 1-heating cover; 11-insulating main bottom plate; 12-stainless steel side plate; 13-stainless steel top plate; 14-feed end magnetic field shielding plate; 15-root magnetic field shielding plate; 2-parent material induction heating coil; 3-transition section induction heating coil; 4-forming section induction heating coil; 5-heel induction heating coil; 6-adjustment component; 61-coil positioning copper screw; 62-waist groove fixing strip one; 63-coil support foot; 64-waist groove fixing strip two; 7-adjustable connecting copper bar; 8-coil extension copper tube; 9-main output copper bar; 10-box type connecting fixture; 16-temperature measuring hole one; 17-temperature measuring hole two; 18-infrared bracket; 19-infrared temperature measuring probe; 20-infrared thermometer; 21-inner insulation layer; 22-quartz plate layer; 23-water distributor; 24-coil quick-tightening water interface; 25-rail. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technical personnel in the field without creative work are within the scope of protection of the present utility model.

[0029] Reference Figure 1-Figure 4A rail heating inductor with adjustable axial temperature uniformity comprises a heating cover 1, a base material induction heating coil 2, a transition section induction heating coil 3, a forming section induction heating coil 4 and a heel induction heating coil 5. A feed port is provided on an outer wall of one side of the heating cover 1. The base material induction heating coil 2, the transition section induction heating coil 3, the forming section induction heating coil 4 and the heel induction heating coil 5 are electrically connected in sequence in a direction away from the feed port and are all directly opposite to the feed port. An adjusting component 6 for adjusting the mutual spacing between the base material induction heating coil 2, the transition section induction heating coil 3, the forming section induction heating coil 4 and the heel induction heating coil 5 is installed in the heating cover 1. When in use, the rail 25 is inserted into the heating cover 1 from the feed port and penetrates the base material induction heating coil 2, the transition section induction heating coil 3, the forming section induction heating coil 4 and the heel induction heating coil 5 in sequence to achieve segmented heating.

[0030] In a further embodiment, the heating cover 1 includes an insulating main bottom plate 11, a stainless steel side plate 12, a stainless steel top plate 13, a feed end magnetic field shielding plate 14 and a root magnetic field shielding plate 15. The feed end magnetic field shielding plate 14 is detachably mounted on the upper surface of the insulating main bottom plate 11 through a box-type connecting fixture 10 and is located on the side of the parent material induction heating coil 2 away from the heel induction heating coil 5. The feed port is opened on the feed end magnetic field shielding plate 14. The root magnetic field shielding plate 15 is detachably mounted on the upper surface of the insulating main bottom plate 11 through a box-type connecting fixture 10 and is located on the side of the heel induction heating coil 5 away from the parent material induction heating coil 2. Two stainless steel side plates 12 are provided. The stainless steel top plate 13 and the two stainless steel side plates 12 are packaged together with the insulating main bottom plate 11, the feed end magnetic field shielding plate 14 and the root magnetic field shielding plate 15 through the box-type connecting fixture 10 to form the heating cover 1 as a whole.

[0031] In a further embodiment, the base material induction heating coil 2, the transition section induction heating coil 3, the forming section induction heating coil 4 and the heel induction heating coil 5 are all formed by winding water-cooled copper tubes in parallel into trapezoidal profiled spiral induction coils. The water-cooled copper tube induction coil adopts a trapezoidal design, which can reduce the magnetic leakage of the coil and improve the energy conversion efficiency of the induction coil.

[0032] Reference Figure 2-Figure 4 A rail heating inductor with adjustable axial temperature uniformity also includes an adjustable connecting copper bar 7, a coil extension copper tube 8 and a main output copper bar 9. The adjustable connecting copper bar 7 is a plate body with a waist-shaped groove and is installed with three. The base material induction heating coil 2, the transition section induction heating coil 3, the forming section induction heating coil 4 and the heel induction heating coil 5 are connected in series through the three adjustable connecting copper bars 7 and then electrically connected to the main output copper bar 9 through the coil extension copper tube 8.

[0033] Reference Figure 2-Figure 4In a further embodiment, the adjustment component 6 includes a coil positioning copper screw 61, a waist groove fixing strip 1 62, a coil supporting foot 63 and a waist groove fixing strip 2 64. The two side surfaces and the top surface of each circle of copper tube of the parent material induction heating coil 2, the transition section induction heating coil 3, the forming section induction heating coil 4 and the heel induction heating coil 5 are welded and fixed with a coil positioning copper screw 61. The multiple coil positioning copper screws 61 on the side surfaces of the parent material induction heating coil 2, the transition section induction heating coil 3, the forming section induction heating coil 4 and the heel induction heating coil 5 are fixed as a whole by the waist groove fixing strip 1 62. The coil supporting foot 63 is welded and fixed on the insulating main bottom plate 11 and multiple coil supporting feet 63 are arranged along the distribution direction of the four groups of coil modules. The waist groove fixing strip 1 62 is fixedly connected with the multiple coil supporting feet 63 on the same side by bolts to achieve fixation. The multiple coil positioning copper screws 61 on the top are fixed as a whole by the waist groove fixing strip 2 64.

[0034] By adjusting the component 6, the gap between the turns of the induction heating coils in the forming section, transition section and parent material section can be adjusted. Each heating area is provided with an induction coil of different structure, so that the magnetic induction intensity in different axial areas can be changed, thereby improving the axial temperature uniformity of the rail 25 branch.

[0035] Reference Figure 1 and Figure 2 In a further embodiment, two temperature measuring holes 16 are provided on the waist groove fixing strip 64, and the two temperature measuring holes 16 correspond to the transition section induction heating coil 3 and the forming section induction heating coil 4 respectively. Two waist-shaped temperature measuring holes 17 are provided on the top of the heating cover 1 corresponding to the two temperature measuring holes 16. A transition section infrared temperature measuring probe 19 and a forming section infrared temperature measuring probe 19 facing the two temperature measuring holes 17 are fixedly installed on the top of the heating cover 1 through an infrared bracket 18; an infrared thermometer 20 is detachably installed on the top wall of the heating cover 1 at the feed port end and the end away from the feed port through an infrared bracket 18, so that the temperature of different areas of the branch can be detected. When the temperature difference between different heating areas is too large, the heat preservation can be automatically performed evenly, so the temperature of different axial areas can be controlled to ensure that the overall heating temperature of the rail 25 branch is uniform, and to prevent the occurrence of local excessively high and low temperatures during the heating process.

[0036] Reference Figure 1 and Figure 2 An inner insulation layer 21 is provided in the heating outer cover 1 corresponding to the feed port. The inner insulation layer 21 has the same trapezoidal shape as the feed port. The rail 25 extends into the inner insulation layer 21 through the feed port. The parent material induction heating coil 2, the transition section induction heating coil 3, the forming section induction heating coil 4 and the heel induction heating coil 5 are all wound around the outer surface of the inner insulation layer 21. A quartz plate layer 22 is bonded and fixed to the inner wall of the inner insulation layer 21, thereby reducing the heat radiation of the rail 25 to the outside and increasing the stability of the constant temperature environment inside the coil.

[0037] Reference Figure 2-Figure 4 In a further embodiment, a water divider 23 is installed in the heating outer cover 1, and a water joint is installed on the root magnetic field shielding plate 15. The water divider 23 is connected to an external water source through the water joint. The parent material induction heating coil 2, the transition section induction heating coil 3, the forming section induction heating coil 4 and the heel induction heating coil 5 are all welded and fixed with a coil quick-twist water interface 24. The four coil quick-twist water interfaces 24 are all connected to the water divider 23 through a hose, so that the coil can be cooled by water in sections to prevent the heating coil from overheating during the heating process and improve the service life of the induction coil.

[0038] The above is only a preferred embodiment of the utility model, and is not any formal or substantial limitation of the utility model. It should be pointed out that ordinary technicians in this technical field can make some improvements and supplements without departing from the utility model, and these improvements and supplements should also be regarded as the protection scope of the utility model. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the utility model, which are all equivalent embodiments of the utility model; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. A rail heating inductor with adjustable axial temperature uniformity, characterized in that: The invention comprises a heating outer cover (1), a base material induction heating coil (2), a transition section induction heating coil (3), a forming section induction heating coil (4) and a heel induction heating coil (5); a feed port is provided on an outer wall of one side of the heating outer cover (1); the base material induction heating coil (2), the transition section induction heating coil (3), the forming section induction heating coil (4) and the heel induction heating coil (5) are electrically connected in sequence in a direction away from the feed port and are all directly opposite to the feed port; an adjusting component (6) for adjusting the mutual spacing between the base material induction heating coil (2), the transition section induction heating coil (3), the forming section induction heating coil (4) and the heel induction heating coil (5) is provided in the heating outer cover (1); It also includes an adjustable connecting copper bar (7), a coil extension copper tube (8) and a main output copper bar (9). Three adjustable connecting copper bars (7) are provided. The parent material induction heating coil (2), the transition section induction heating coil (3), the forming section induction heating coil (4) and the heel induction heating coil (5) are connected in series through the three adjustable connecting copper bars (7) and then electrically connected to the main output copper bar (9) through the coil extension copper tube (8).

2. A rail heating inductor with adjustable axial temperature uniformity as claimed in claim 1, characterized in that: The adjustment component (6) comprises a coil positioning copper screw (61), a waist groove fixing strip (62), a coil supporting foot (63) and a waist groove fixing strip (64). The two side surfaces and the top surface of each circle of the pipe of the parent material induction heating coil (2), the transition section induction heating coil (3), the forming section induction heating coil (4) and the heel induction heating coil (5) are welded with the coil positioning copper screw (61). The plurality of coil positioning copper screws (61) on the side surfaces of the parent material induction heating coil (2), the transition section induction heating coil (3), the forming section induction heating coil (4) and the heel induction heating coil (5) are integrally fixed by the waist groove fixing strip (62). The waist groove fixing strip (62) is fixed to the inner wall of the heating outer cover (1) by the coil supporting foot (63). The plurality of coil positioning copper screws (61) on the top are integrally fixed by the waist groove fixing strip (64).

3. A rail heating inductor with adjustable axial temperature uniformity as claimed in claim 2, characterized in that: The waist groove fixing strip (64) is provided with two temperature measuring holes (16), the two temperature measuring holes (16) respectively corresponding to the transition section induction heating coil (3) and the forming section induction heating coil (4) area, the top of the heating outer cover (1) is provided with two waist-shaped temperature measuring holes (17) corresponding to the two temperature measuring holes (16), and the top of the heating outer cover (1) is provided with a transition section infrared temperature measuring probe (19) and a forming section infrared temperature measuring probe (19) directly opposite to the two temperature measuring holes (17).

4. A rail heating inductor with adjustable axial temperature uniformity as claimed in claim 1, characterized in that: An inner thermal insulation layer (21) is provided in the heating outer cover (1) corresponding to the feed port, and a rail (25) extends into the inner thermal insulation layer (21) through the feed port. The parent material induction heating coil (2), the transition section induction heating coil (3), the forming section induction heating coil (4) and the heel induction heating coil (5) are all wound outside the inner thermal insulation layer (21), and a quartz plate layer (22) is provided on the inner wall of the inner thermal insulation layer (21).

5. The rail heating inductor with adjustable axial temperature uniformity as claimed in claim 1, characterized in that: The heating cover (1) comprises an insulating main bottom plate (11), a stainless steel side plate (12), a stainless steel top plate (13), a feed end magnetic field shielding plate (14) and a root magnetic field shielding plate (15); the feed end magnetic field shielding plate (14) is detachably arranged on the insulating main bottom plate (11) and is located on a side of the parent material induction heating coil (2) away from the root induction heating coil (5); the feed port is opened on the feed end magnetic field shielding plate (14); the root magnetic field shielding plate (15) is detachably arranged on the insulating main bottom plate (11) and is located on a side of the root induction heating coil (5) away from the parent material induction heating coil (2); two stainless steel side plates (12) are provided; the stainless steel top plate (13) and the two stainless steel side plates (12) cooperate with the insulating main bottom plate (11), the feed end magnetic field shielding plate (14) and the root magnetic field shielding plate (15) to achieve packaging.

6. A rail heating inductor with adjustable axial temperature uniformity as claimed in claim 1, characterized in that: A water distributor (23) is provided in the heating outer cover (1), and the water distributor (23) is connected to an external water source. The parent material induction heating coil (2), the transition section induction heating coil (3), the forming section induction heating coil (4) and the heel induction heating coil (5) are all provided with coil quick-twist water interfaces (24), and the four coil quick-twist water interfaces (24) are all connected to the water distributor (23) through a hose.

7. A rail heating inductor with adjustable axial temperature uniformity as claimed in claim 1, characterized in that: The parent material induction heating coil (2), the transition section induction heating coil (3), the forming section induction heating coil (4) and the heel induction heating coil (5) are all formed by winding water-cooled copper tubes in parallel into trapezoidal profiled spiral induction coils.

8. The rail heating inductor with adjustable axial temperature uniformity as claimed in claim 1, characterized in that: The heating outer cover (1) is provided with an infrared thermometer (20) which can be detachably mounted on the top wall of the feeding port end and the end away from the feeding port.

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