A flat plate induction heating coil

Abstract

The utility model discloses a flat plate induction heating coil, including symmetrical induction heating assembly no.

Description

Technical Field

[0001] This utility model relates to the field of induction heating technology, specifically a flat induction heating coil. Background Technology

[0002] Induction heating technology, as a highly efficient and energy-saving non-contact heating method, is widely used in heat treatment, forging, smelting, and welding of metal materials. Its basic principle is to use alternating current to generate an alternating magnetic field in an induction coil, which in turn induces eddy currents inside the workpiece being heated. The Joule heating generated by these eddy currents achieves rapid heating of the workpiece. Among the many induction heating applications, the heating requirements for disc-shaped workpieces (such as gears, flanges, and bearings) are particularly prominent.

[0003] Traditional induction coils typically employ a helical winding structure, with the workpiece entering the coil cavity along its axis for heating. When heating large or thick-walled disc-shaped workpieces, horizontal entry is required, meaning the workpiece axis is perpendicular to the coil axis. On one hand, the helical coil exhibits significant magnetic field concentration and attenuation regions in its spatial distribution, leading to uneven magnetic field distribution within the coil and consequently uneven workpiece heating. On the other hand, the significant difference in length between the inner and outer coils results in uneven current density distribution, further exacerbating the temperature difference problem. This often leads to insufficient heating on the inner side and overheating on the outer side, severely impacting heating quality and subsequent processing performance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a flat induction heating coil that provides more uniform heating compared to traditional spiral coils, solves the problem of large temperature difference between the outer and inner heating, and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flat induction heating coil, comprising a first induction heating component and a second induction heating component symmetrically arranged, and a bridging copper busbar electrically connecting the first and second induction heating components; both the first and second induction heating components include at least two parallel straight conductors arranged in a trapezoidal step shape, one end of the uppermost straight conductor of the first induction heating component is provided with a first connecting copper busbar, one end of the lowermost straight conductor of the second induction heating component is provided with a second connecting copper busbar, the other end of the uppermost straight conductor of the first induction heating component is electrically connected to one end of the uppermost straight conductor of the second induction heating component through the bridging copper busbar, and the other end of the uppermost straight conductor of the second induction heating component is electrically connected to one end of the second straight conductor of the first induction heating component, thereby forming a frame-type induction coil with heating depth through the electrical connection of the first induction heating component, the second induction heating component, and the bridging copper busbar.

[0006] Preferably, the linear conductors in the first induction heating component and the second induction heating component are arranged side by side, one above the other.

[0007] Preferably, the bridging copper busbar includes a copper strip with two vertical sections, which are electrically connected to the copper busbar at the end of the straight conductor via insulating bolts.

[0008] Preferably, the straight conductor is a square, round, square tube, or round tube conductor, and the material is copper or aluminum. When the straight conductor is square tube or round tube, both ends are sealed and respectively welded with inlet and outlet water pipes.

[0009] Compared with the prior art, the beneficial effects of this utility model are: by setting two sets of parallel induction heating components and then connecting the two sets of induction heating components by bridging copper busbars to form a frame-type induction coil with heating depth, the magnetic field uniformity between the two sets of induction heating components is better. For disc-shaped workpieces that enter the heating horizontally, the heating is more uniform than that of traditional spiral coils, which solves the problem of large temperature difference between the outer and inner heating. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0011] In the diagram: 1 Induction heating component one, 2 Induction heating component two, 3 Bridging copper busbar, 4 Wiring copper busbar one, 5 Wiring copper busbar two. Detailed Implementation

[0012] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0013] Please see Figure 1-2 The present invention provides the following technical solution: Example 1: A flat induction heating coil includes a symmetrically arranged induction heating component 1 and induction heating component 2, and a bridging copper busbar 3 electrically connecting the induction heating component 1 and induction heating component 2. Both the induction heating component 1 and the induction heating component 2 include at least two parallel straight conductors arranged in a trapezoidal step shape. One end of the uppermost straight conductor of the induction heating component 1 is provided with a connecting copper busbar 4, and one end of the lowermost straight conductor of the induction heating component 2 is provided with a connecting copper busbar 5. The other end of the uppermost straight conductor of the induction heating component 1 is electrically connected to one end of the uppermost straight conductor of the induction heating component 2 through the bridging copper busbar 3. The other end of the uppermost straight conductor of the induction heating component 2 is electrically connected to one end of the second straight conductor of the induction heating component 1. Thus, the induction heating component 1, the induction heating component 2, and the bridging copper busbar 3 are connected to form a frame-type induction coil with heating depth. It should be noted that the linear conductors in induction heating component 1 and in induction heating component 2 are arranged side by side, one above the other. It is understandable that, based on the right-hand rule of electric current and magnetic field, the current directions of the electrically connected induction heating component 1 and induction heating component 2 are opposite, and the magnetic fields of both components diffuse outward from their centers. This results in a uniform magnetic field distribution within both components, enabling uniform heating of horizontally inserted disc-shaped workpieces. Figure 1 As shown, the axis of the disc-shaped workpiece is perpendicular to the entry direction. Compared with the traditional disc-shaped workpiece entering the spiral coil horizontally, this solves the problems of uneven heating and large temperature difference between the inside and outside of the coil.

[0014] Example 2: Unlike Example 1, the bridging copper busbar 3 includes a copper strip with two vertical parts. The vertical parts are electrically connected to the copper busbar at the end of the straight conductor by insulating bolts. That is, the bridging copper busbar 3 has a certain distance from the induction heating component 1 and the induction heating component 2 on the horizontal plane, which is the clearance distance. This distance is used for the workpiece to enter for heating.

[0015] Example 3: Unlike Example 1, the straight conductor is a square, round, square tube, or round tube conductor, but is not limited to square, round, square tube, or round tube. The material is copper or aluminum, but is not limited to copper, aluminum, etc. When the straight conductor is a square tube or round tube, both ends are sealed and water inlet and outlet pipes are welded on respectively. That is, existing copper square tubes or copper round tubes are used for water cooling.

[0016] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents in the content of this utility model.

Claims

1. A flat induction heating coil, characterized in that: The device includes a symmetrically arranged induction heating component one (1) and induction heating component two (2), and a bridging copper busbar (3) electrically connecting the induction heating component one (1) and induction heating component two (2); the induction heating component one (1) and induction heating component two (2) each include at least two parallel straight conductors in a trapezoidal step shape. One end of the uppermost straight conductor of the induction heating component one (1) is provided with a wiring copper busbar one (4), and one end of the lowermost straight conductor of the induction heating component two (2) is provided with a wiring copper busbar two (5). The other end of the uppermost straight conductor of the induction heating component one (1) is electrically connected to one end of the uppermost straight conductor of the induction heating component two (2) through the bridging copper busbar (3), and the other end of the uppermost straight conductor of the induction heating component two (2) is electrically connected to one end of the second straight conductor of the induction heating component one (1). The induction heating component one (1), the induction heating component two (2) and the bridging copper busbar (3) are connected to form a frame-type induction coil with heating depth.

2. The flat induction heating coil according to claim 1, characterized in that: The linear conductors in the first induction heating assembly (1) and the second induction heating assembly (2) are arranged side by side.

3. The flat induction heating coil according to claim 1, characterized in that: The bridging copper busbar (3) includes a copper strip with two vertical sections, which are electrically connected to the copper busbar at the end of the straight conductor by insulating bolts.

4. A flat induction heating coil according to claim 1, characterized in that: The straight conductor is a square, round, square tube, or round tube conductor, made of copper or aluminum. When the straight conductor is a square tube or round tube, both ends are sealed and respectively welded with inlet and outlet pipes.

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