A double-parallel-wound induction coil for an induction furnace

Abstract

The utility model discloses a double parallel-wound induction coil for an induction furnace, belonging to the technical field of induction coils. The wound coils 1 and 2 and the water-cooled secondary coil stainless steel pipe are welded with fixing bolts and fixed on bakelite columns; the water inlet and outlet of the coils 1 and 2 are arranged in the middle of the cable outlet span on both sides and corresponding water inlet and outlet nozzles are arranged, the coils 1 and 2 are respectively connected to two wiring copper bars, and the welding of the outlet copper tube and the outlet connection busbar is completed according to the principle that the current of each copper tube busbar is consistent with the direction of the magnetic field. The upper and lower secondary windings of the coils 1 and 2 solve the demand for large current carrying capacity of the induction coil of the high-power induction furnace, and the cables are symmetrically output on both sides, which disperses and weakens the thermal and magnetic effects of strong electric and magnetic fields on the surrounding ferromagnetic components or electronic components. At the same time, the outlet cables are distributed on both sides, and the force on the coils is more dispersed and uniform, which will not cause damage to the coil structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of induction coils, in particular to a double-parallel-wound induction coil used for an induction furnace. Background Art

[0002] With the continuous updating and iteration of semiconductor hardware, high-voltage, high-current power semiconductor devices have gradually become mature and reliable, and the development of induction furnaces is no longer restricted by power semiconductor devices. At the same time, with the huge market demand, high-power, large-capacity induction furnaces have become important smelting equipment urgently needed by many steel companies.

[0003] An important part of a high-power, large-capacity induction furnace is the mold part, and one of the important parts of the mold part is the induction coil.

[0004] The traditional induction coil structure is: divided into two windings, each winding is wound by a single copper tube busbar. The outgoing line is a single-side outgoing line, with the outgoing cable on one side and the water inlet and outlet on the other side. As shown in the figure.

[0005] The high-power induction coil has a larger diameter and a higher height. If the traditional manufacturing method is used, the following problems will arise:

[0006] 1. The height of the copper tube busbar section is higher, and the copper tube manufacturer may not be able to produce copper tubes of this specification according to the current process. Even if it can be produced, the welding quality of the copper tube butt welding cannot be guaranteed according to the current welding process, and it is very easy to cause water seepage and leakage in the joints.

[0007] 2. The single-sided wiring method will cause the electric and magnetic fields in this area to be very strong. Then the ferromagnetic components in this area will become hot and red under the influence of strong electric and magnetic fields, and all electrical components will fail.

[0008] 3. In the single-side outgoing mode, all outgoing cables are centrally connected to the same set of wiring copper bars. The induction coil is subjected to greater force on one side, which will cause damage to the induction coil structure. Utility Model Content

[0009] 1. Technical problems to be solved by the utility model

[0010] The utility model aims to solve the problem that the induction coil of the existing large-capacity induction furnace uses a single-side outlet mode and has a high failure rate and a short service life.

[0011] 2. Technical solution

[0012] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0013] The utility model discloses a double parallel-wound induction coil for an induction furnace, comprising a wound coil 1 and a wound coil 2, wherein the coil 1 and the coil 2 are both wound by two hollow water-permeable copper tubes, the coil 1 and the coil 2 are arranged in parallel and staggered, the coil 1 and the coil 2 are respectively connected to two wiring copper bars, and the two wiring copper bars are staggered, and the staggered angle of the two wiring copper bars is 90-180 degrees.

[0014] Preferably, water-cooled auxiliary coils 1 and 2 are further provided on the outside of coil 1 and coil 2, and the stainless steel pipes of coil 1, coil 2 and water-cooled auxiliary coils are welded with fixing bolts and installed on fixed bakelite columns.

[0015] Preferably, the water inlet and outlet nozzles are arranged in the middle of the cable outlet span on both sides.

[0016] Preferably, the two connection copper bars are respectively welded to the outgoing copper tube and the outgoing connection busbar according to the principle that the current of the corresponding copper tube busbar is consistent with the direction of the magnetic field.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0019] The utility model is a double parallel-wound induction coil for an induction furnace. The wound coils 1 and 2 and the water-cooled secondary coil stainless steel pipe are welded with fixing bolts, and the bakelite columns are installed and fixed. The water inlet and outlet of the coils 1 and 2 are arranged in the middle position of the cable outlet span on both sides, and the corresponding water inlet and outlet nozzles are arranged. The coils 1 and 2 are respectively connected to two wiring copper bars, and the welding of the outlet copper tube and the outlet connection busbar is completed according to the principle that the current of each copper tube busbar is consistent with the direction of the magnetic field. The upper and lower secondary windings of the coils 1 and 2 solve the demand for large current carrying capacity of the induction coil of the high-power induction furnace, and the cables are symmetrically output on both sides, which disperses and weakens the thermal and magnetic effects of strong electric and magnetic fields on the surrounding ferromagnetic parts or electronic components. At the same time, the outlet cables are distributed on both sides, and the force on the coils is more dispersed and more uniform, which will not cause damage to the coil structure. The two upper and lower windings of coil 1 and coil 2 are wound in parallel with two copper tube busbars that carry water, which solves the demand for large current carrying capacity of induction coils of high-power induction furnaces. The cables are symmetrically output on both sides, which disperses and weakens the thermal and magnetic effects of strong electric and magnetic fields on surrounding ferromagnetic parts or electronic components. At the same time, the output cables are distributed on both sides, so the coil is more dispersed and uniformly stressed, and the coil structure will not be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a double parallel-wound induction coil for an induction furnace according to the utility model.

[0021] Figure 2 This is a front view of a double parallel-wound induction coil for an induction furnace according to the utility model;

[0022] Figure 3 The utility model is a front view of a double parallel-wound induction coil for an induction furnace.

[0023] 100. Mould; 110. Coil 1; 111. Water-cooled auxiliary coil 1; 120. Coil 2; 121. Water-cooled auxiliary coil 2; 130. Water inlet and outlet nozzles; 140. Bakelite column. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0028] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] Example 1

[0031] See attached Figure 1-3 , a double-parallel-wound induction coil for an induction furnace of the present embodiment comprises a wound coil 110 and a coil 2 120, both of which are wound by two hollow water-permeable copper tubes, and the coil 110 and the coil 2 120 are arranged in parallel and staggered, and the coil 110 and the coil 2 120 are respectively connected to two wiring copper bars, and the two wiring copper bars are staggered, and the staggered angle of the two wiring copper bars is 90 to 180°. The double-parallel-wound induction coil of the present invention is formed by two upper and lower auxiliary windings of the coil 110 and the coil 2 120, each of which has two water-permeable copper tube busbars wound in parallel, which solves the demand for large current carrying capacity of the induction coil of a high-power induction furnace, and the cables are symmetrically output on both sides, which disperses and weakens the thermal and magnetic effects of strong electric and magnetic fields on surrounding ferromagnetic components or electronic components. At the same time, the output cables are distributed on both sides, and the force on the coil is more dispersed and more uniform, and the coil structure will not be damaged.

[0032] The water inlet and outlet of the coil 1 110 and the coil 2 120 are arranged on the same side and the corresponding water inlet and outlet nozzles 130 are arranged. The water inlet and outlet nozzles 130 are arranged in the middle of the cable outlet span on both sides. The two wiring copper bars are respectively welded to the outlet copper tube and the outlet connection busbar according to the principle that the current of the corresponding copper tube busbar is consistent with the direction of the magnetic field. The design is to centrally arrange the inlet and outlet water pipelines in the middle, so that the water cooling pipeline of the induction coil is more reasonable and the cooling effect is better. The overall fully symmetrical double parallel flat winding structure has a higher electromagnetic conversion efficiency. The outer side of the coil 1 110 and the coil 2 120 is also provided with a water-cooled sub-ring 1 111 and a water-cooled sub-ring 2 121. The stainless steel pipes of the coil 1 110, the coil 2 120 and the water-cooled sub-ring are welded with fixing bolts and fixed on the bakelite column 140.

[0033] The mold 100 of this embodiment is used to wind the coil 1 110 and the coil 2 120 and provide support, and is not a part of the dual parallel-wound induction coil.

[0034] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A double parallel-wound induction coil for an induction furnace, characterized in that: The invention comprises a coil 1 (110) and a coil 2 (120) which are wound, wherein the coil 1 (110) and the coil 2 (120) are wound by two hollow water-permeable copper tubes, the coil 1 (110) and the coil 2 (120) are arranged in parallel and staggered, the coil 1 (110) and the coil 2 (120) are respectively connected to two copper bus bars, and the two copper bus bars are staggered, and the staggered angle of the two copper bus bars is 90 to 180 degrees.

2. A double parallel-wound induction coil for an induction furnace according to claim 1, characterized in that: The water inlets and outlets of the coil one (110) and the coil two (120) are arranged on the same side and the water inlet and outlet nozzles (130) are arranged correspondingly.

3. The double parallel-wound induction coil for an induction furnace according to claim 1, characterized in that: A water-cooled auxiliary coil 1 (111) and a water-cooled auxiliary coil 2 (121) are also provided on the outside of the coil 1 (110) and the coil 2 (120). The coil 1 (110), the coil 2 (120) and the water-cooled auxiliary coil stainless steel pipes are welded with fixing bolts and installed on the fixed bakelite column (140).

4. The double parallel-wound induction coil for an induction furnace according to claim 2, characterized in that: The water inlet and outlet nozzles (130) are arranged in the middle of the cable outlet spans on both sides.

5. The double parallel-wound induction coil for an induction furnace according to claim 1, characterized in that: The two connection copper bars are respectively welded to the outgoing copper tube and the outgoing connection busbar according to the principle that the corresponding copper tube busbar current is consistent with the magnetic field direction.

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