Steel rail electric normalizing equipment coil die holder

Abstract

The utility model belongs to the technical field of railway engineering mechanical equipment manufacturing, and particularly relates to a steel rail electric normalizing equipment coil die holder with induction coil fixing and air spraying functions, which comprises a first coil die holder and a second coil die holder which are bilaterally symmetrically arranged and rotatably mounted on a die holder mounting seat. The first coil is fixed on the first coil die holder, the second coil is fixed on the second coil die holder, air outlet holes are formed in the front surfaces of the first coil die holder and the second coil die holder, and the air outlet holes are communicated with external compressed air. According to the utility model, the air spraying box required by the electric normalizing equipment is integrated on the coil die holder, so that the size of the equipment is reduced, and the internal structure of the equipment is more compact.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway engineering machinery and equipment manufacturing, in particular to a coil die base for rail electric normalizing equipment with a fixed induction coil and an air jet function. Background Art

[0002] With the rapid development of high-speed rail and the widespread adoption of seamless rail lines, the rail clamp connection method has gradually been replaced. Seamless rails are first welded together using a flash butt welding process, where two short rails are completely welded together. After the rails cool, the weld area is heat treated. Common heat treatment methods include flame normalizing and electric normalizing, which improve the toughness and surface hardness of the rail weld area by secondary heating the rails followed by air jet cooling. Compared to flame normalizing, electric normalizing offers advantages such as stability, controllability, safety, reliability, and a narrow heat-affected zone, and is now widely used.

[0003] Existing patents include the Chinese utility model patent named "An integrated normalizing operation head" with publication number CN219117496U. The patent describes a normalizing head with heating and air spraying functions. The coil fixing seat and air spray box described therein are split and independent, making the equipment larger in size.

[0004] Another example is the Chinese invention patent entitled "A heat treatment method for the heel-end forging section of a rail" with publication number CN110042210A. This patent describes a rail heat treatment method in which the rail is cooled by spraying air after heating. The spray boxes described therein are three independent spray boxes and do not have the function of fixing the normalizing coil.

[0005] Another example is the Chinese utility model patent entitled "Air jet cooling equipment for rail welding production line" with publication number CN219787091U. This patent describes an air jet cooling device on a rail welding production line. The air jet box described therein is divided into two parts, left and right. This structure cannot be applied to on-site mobile normalizing equipment. Summary of the Invention

[0006] Since the equipment is used for on-site construction, there are certain requirements for the volume and weight of the equipment. This application specifically proposes a coil die base for rail electric normalizing equipment that reduces weight and equipment volume.

[0007] To achieve the above technical effects, the technical solutions of this application are as follows:

[0008] A coil die base for rail electric normalizing equipment includes a first coil die base and a second coil die base arranged symmetrically on the left and right. The first coil die base and the second coil die base are rotatably mounted on a die base mounting base. The first coil is fixed on the first coil die base, and the second coil is fixed on the second coil die base. The front sides of the first coil die base and the second coil die base are provided with air outlet holes, which are connected to external compressed air.

[0009] Furthermore, a plurality of rows of air outlets are distributed on the upper middle portion of the front side of the first coil mold base and the second coil mold base. The air outlets are connected to the internal ventilation holes of the first coil mold base and the second coil mold base, and external compressed air is connected to the ventilation holes.

[0010] Furthermore, the ventilation holes are interconnected.

[0011] Furthermore, the first coil die base and the second coil die base are mounted on the die base mounting base via pins.

[0012] Furthermore, the first coil and the second coil form an induction heating closed loop when they are closed, and during normalizing, the rail is located between the first coil and the second coil.

[0013] Furthermore, the upper part of the first coil mold base has two pin holes, which cooperate with the pin holes. The side of the first coil mold base is provided with an upper coil mounting surface and a lower mounting surface from top to bottom. The upper coil mounting surface has a coil fixing hole, and the lower mounting surface has a coil fixing hole. The bolt passes through the first coil and the coil fixing hole to fix the first coil.

[0014] Furthermore, a cooling water hole is provided inside the first coil mold base, and the cooling water hole includes a vertically arranged water inlet hole and a water outlet hole, and a horizontally arranged process hole is connected below the water inlet hole and the water outlet hole.

[0015] Furthermore, the second coil mold base has the same structure as the first coil mold base and is symmetrically arranged.

[0016] The working principle of this application is:

[0017] Step 1: When not in operation, the coils are in an open state. After the normalizing rails are in place, the two coils are closed.

[0018] Step 2: The coil is connected to a high-frequency current, and cooling water is passed through the coil and the die base. A changing magnetic field is generated around the coil, and the rail is affected by the magnetic field to generate an induced current, thereby heating the rail.

[0019] Step 3: After the rail is heated to above 900℃, the high-frequency current is disconnected and compressed air is passed through the coil mold base. The compressed air is sprayed onto the surface of the rail through the air outlet to quickly cool the rail.

[0020] Step 4: When the surface temperature of the rail is lower than 500℃, disconnect the compressed air, open the coil die, take out the rail, and normalizing is completed.

[0021] The advantages of this application are:

[0022] 1. The utility model integrates the air spray box required for electric normalizing equipment onto the coil die base, which reduces the volume of the equipment and makes the internal structure of the equipment more compact.

[0023] 2. Since the coil die base of the utility model integrates the function of the air spray box, air spraying can be realized immediately after the rail heating is completed, which avoids the need to move the air spray box to the rail heating position after heating and then start the air spray. The immediate air spray method has better normalizing quality.

[0024] 3. The coil die base of the utility model has cooling water holes to prevent the die base temperature from rising during the normalizing heating process, causing the die base to deform, resulting in poor contact conditions on the contact surface and affecting the normalizing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the coil when it is closed in this application.

[0026] Figure 2 This is a schematic diagram of the coil when it is opened.

[0027] Figure 3 and Figure 4 This is a three-dimensional diagram of the mold base structure of this application.

[0028] Figure 5 This is a front view of the mold base structure for this application.

[0029] Figure 6 This is a cross-sectional view showing the ventilation hole structure of the mold base structure of this application.

[0030] Figure 7 This is a cross-sectional view showing the cooling water hole structure of the mold base structure of this application.

[0031] In the accompanying drawings: 1-first coil mold base, 2-second coil mold base, 3-first coil, 4-second coil, 5-mold base mounting base, 6-pin shaft, 101-pin shaft hole, 102-coil fixing hole, 103-air outlet hole, 104-ventilation hole, 105-cooling water hole, 1051-water inlet hole, 1052-water outlet hole, 1053-process hole. DETAILED DESCRIPTION

[0032] 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.

[0033] 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 making any creative efforts shall fall within the scope of protection of the present application.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Example 1

[0038] like Figure 1-Figure 5As shown, a coil die base for rail electric normalizing equipment includes a first coil die base 1 and a second coil die base 4, which are symmetrically arranged on both sides. The first coil die base 1 and the second coil die base 4 are rotatably mounted on a die base mounting base 5. The first coil 3 is fixed to the first coil die base 1, and the second coil 4 is fixed to the second coil die base 4. The front surfaces of the first coil die base 1 and the second coil die base 4 are provided with air outlet holes 103, which communicate with external compressed air. The first coil die base 1 and the second coil die base 4 can rotate to close and open the first coil 3 and the second coil 4.

[0039] The working principle of this application is:

[0040] Step 1: When not in operation, the coils are in an open state. After the normalizing rails are in place, the two coils are closed.

[0041] Step 2: The coil is connected to a high-frequency current, and cooling water is passed through the coil and the die base. A changing magnetic field is generated around the coil, and the rail is affected by the magnetic field to generate an induced current, thereby heating the rail.

[0042] Step 3: After the rail is heated to above 900℃, the high-frequency current is disconnected and compressed air is passed through the coil mold base. The compressed air is sprayed onto the surface of the rail through the air outlet to quickly cool the rail.

[0043] Step 4: When the surface temperature of the rail is lower than 500℃, disconnect the compressed air, open the coil die, take out the rail, and normalizing is completed.

[0044] The utility model integrates the air spray box required by the electric normalizing equipment onto the coil die base, thereby reducing the volume of the equipment and making the internal structure of the equipment more compact.

[0045] Example 2

[0046] like Figure 1-Figure 5 As shown, a coil die base for rail electric normalizing equipment includes a first coil die base 1 and a second coil die base 4, which are symmetrically arranged on both sides. The first coil die base 1 and the second coil die base 4 are rotatably mounted on a die base mounting base 5. The first coil 3 is fixed to the first coil die base 1, and the second coil 4 is fixed to the second coil die base 4. The front surfaces of the first coil die base 1 and the second coil die base 4 are provided with air outlet holes 103, which communicate with external compressed air. The first coil die base 1 and the second coil die base 4 can rotate to close and open the first coil 3 and the second coil 4.

[0047] like Figure 6 As shown, a plurality of air outlet holes 103 are distributed in the upper middle part of the front of the first coil mold base 1 and the second coil mold base 4. The air outlet holes 103 are connected to the internal ventilation holes 104 of the first coil mold base 1 and the second coil mold base 4, and the external compressed air is connected to the ventilation holes 104.

[0048] The ventilation holes 104 are interconnected to ensure that the compressed air is evenly distributed among the ventilation holes 104 and that the air output of the three columns of ventilation holes 103 is uniform.

[0049] The first coil die base 1 and the second coil die base 4 are mounted on the die base mounting base 5 via a pin shaft 6 .

[0050] When the first coil 3 and the second coil 4 are closed, an induction heating closed loop is formed. During normalizing, the rail is located between the first coil 3 and the second coil 4. A high-frequency current passes through the closed loop formed by the coils, forming a high-frequency changing magnetic field around the coils. The rail is affected by the magnetic field, and an induced current is generated inside and on the surface of the rail. The induced current heats the rail, thereby achieving the purpose of normalizing by heating the rail.

[0051] There are two pin shaft 6 holes on the upper part of the first coil mold base 1, and the pin shaft 6 holes cooperate with the pin shaft 6. The side of the first coil mold base 1 is provided with an upper coil mounting surface and a lower mounting surface from top to bottom. The upper coil mounting surface has 4 coil fixing holes 102, and the lower mounting surface has 2 coil fixing holes 102. The bolts pass through the first coil 3 and the coil fixing holes 102 to fix the first coil 3.

[0052] like Figure 7 As shown, there is a cooling water hole 105 inside the first coil mold base 1, and the cooling water hole 105 includes a vertically arranged water inlet hole 1051 and a water outlet hole 1052. The water inlet hole 1051 and the water outlet hole 1052 are connected to a horizontally arranged process hole 1053 below. The cooling water hole 105 forms a circulating water channel inside the first coil mold base 1. The process hole 1053 is a hole that must be processed when connecting the water inlet and outlet holes 1052. When connecting the water channel, the process hole 1053 needs to be sealed with a plug to form a circulating water channel, thereby reducing the temperature of the first coil mold base 1 during operation.

[0053] The mold base for the second coil 4 has the same structure as the mold base for the first coil 1 and is symmetrically arranged. The mold base for the second coil 4 also has cooling water holes 105 and ventilation holes 104 inside.

[0054] The working principle of this application is:

[0055] Step 1: When not in operation, the coils are in an open state. After the normalizing rails are in place, the two coils are closed.

[0056] Step 2: The coil is connected to a high-frequency current, and cooling water is passed through the coil and the die base. A changing magnetic field is generated around the coil, and the rail is affected by the magnetic field to generate an induced current, thereby heating the rail.

[0057] Step 3: After the rail is heated to above 900℃, the high-frequency current is disconnected and compressed air is passed through the coil mold base. The compressed air is sprayed onto the surface of the rail through the air outlet to quickly cool the rail.

[0058] Step 4: When the surface temperature of the rail is lower than 500℃, disconnect the compressed air, open the coil die, take out the rail, and normalizing is completed.

[0059] The present invention integrates the air blower required for electric normalizing equipment into the coil die base, reducing the size of the equipment and making the internal structure of the equipment more compact. Since the coil die base of the present invention integrates the air blower function, air blower operation can be immediately initiated after rail heating is complete. This eliminates the need to move the separate air blower to the rail heating position before air blower operation is initiated. This immediate air blower method provides improved normalizing quality. The coil die base of the present invention has cooling water holes 105 to prevent the die base from overheating during the normalizing heating process, which could cause deformation of the die base and deteriorate the contact conditions of the contact surfaces, thereby affecting normalizing quality.

[0060] When not in operation, the first coil 3 and the second coil 4 are in an open state. After the normalizing rail is in place, they are located between the first coil 3 and the second coil 4, and the two coils are closed. The coils are connected to a high-frequency current, and at the same time, the first coil mold base 1, the second coil 4 mold base, the first coil 3, and the second coil 4 are cooled by cooling water. After the rail is heated to above 900°C, the high-frequency current is disconnected, and the cooling water is not disconnected. At this time, the first coil mold base 1 and the second coil 4 mold base are connected to compressed air, which is sprayed onto the surface of the rail through the air outlet 103 to quickly cool the rail. When the surface temperature of the rail is lower than 500°C, the compressed air is disconnected, the first coil mold base 1 and the second coil 4 mold base are opened, the rail is taken out, and the normalizing is completed.

Claims

1. A coil die base for rail electric normalizing equipment, characterized by: The invention comprises a first coil die base (1) and a second coil die base (4) which are symmetrically arranged on both sides. The first coil die base (1) and the second coil die base (4) are rotatably mounted on a die base mounting base (5). The first coil (3) is fixed on the first coil die base (1), and the second coil (4) is fixed on the second coil die base (4). The front sides of the first coil die base (1) and the second coil (4) die base are provided with air outlet holes (103), and the air outlet holes (103) are connected to external compressed air.

2. The coil die base for rail electric normalizing equipment according to claim 1, characterized in that: A plurality of air outlet holes (103) are distributed on the upper middle portion of the front face of the first coil mold base (1) and the second coil (4) mold base. The air outlet holes (103) are connected to the internal ventilation holes (104) of the first coil mold base (1) and the second coil (4) mold base, and external compressed air is connected to the ventilation holes (104).

3. The coil die base for rail electric normalizing equipment according to claim 2, characterized in that: The ventilation holes (104) are interconnected.

4. The coil die base for rail electric normalizing equipment according to claim 1, characterized in that: The first coil die base (1) and the second coil (4) die base are mounted on a die base mounting base (5) via a pin shaft (6).

5. The coil die base for rail electric normalizing equipment according to claim 1, characterized in that: When the first coil (3) and the second coil (4) are closed, an induction heating closed loop is formed; during normalizing, the rail is located between the first coil (3) and the second coil (4).

6. The coil die base for rail electric normalizing equipment according to claim 1, characterized in that: The upper portion of the first coil die base (1) has two pin (6) holes, the pin (6) holes cooperate with the pin (6), and the side surface of the first coil die base (1) is provided with an upper coil mounting surface and a lower mounting surface from top to bottom, the upper coil mounting surface has a coil fixing hole (102), and the lower mounting surface has a coil fixing hole (102), and a bolt passes through the first coil (3) and the coil fixing hole (102) to fix the first coil (3).

7. The coil die base for rail electric normalizing equipment according to claim 1, characterized in that: The first coil die base (1) has a cooling water hole (105) inside, and the cooling water hole (105) includes a vertically arranged water inlet hole (1051) and a water outlet hole (1052), and a horizontally arranged process hole (1053) is connected below the water inlet hole (1051) and the water outlet hole (1052).

8. The coil die base for rail electric normalizing equipment according to claim 1, characterized in that: The second coil (4) mold base has the same structure as the first coil mold base (1).

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