Double-body electric furnace transformer and coil assembly thereof

Abstract

The application discloses a double-body electric furnace transformer and a coil assembly thereof, wherein the coil assembly of the double-body electric furnace transformer comprises a main transformer coil and a series transformer coil; the main transformer coil comprises a main transformer secondary coil; the main transformer secondary coil comprises a first double-disk coil which is wound by a wire; the series transformer coil comprises a series transformer secondary coil; the series transformer secondary coil comprises a second double-disk coil which is wound by a wire; and the wires of the first double-disk coil and the second double-disk coil are connected in pairs to form an 8-shaped coil structure. As can be seen from the above description, in the coil assembly of the double-body electric furnace transformer provided in the application, the main transformer secondary coil and the series transformer secondary coil are both wound in a double-disk manner, each double-disk coil is an independent unit and can be wound separately, the method is simple in structure and easy to operate, and the double-body electric furnace transformer is convenient to maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of electric furnace transformers, and in particular to a double-body electric furnace transformer and a coil assembly thereof. Background Art

[0002] As the capacity of single electric furnace transformers and the secondary coil current required by the smelting industry become larger and larger, the wire size and hardness of the secondary coil of the coil assembly in the double-body electric furnace transformer are large, and the traditional secondary coil is wound with an 8-shaped coil.

[0003] However, the method of winding the "8"-shaped coil is cumbersome, there are many types of spacers, it is highly dependent on special tools and tooling, it requires high skills from personnel, and the maintenance process is complicated.

[0004] Therefore, how to improve the maintenance convenience of the coil assembly is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] An object of the present invention is to provide a coil assembly for a double-body electric furnace transformer, which has improved maintenance convenience. Another object of the present invention is to provide a double-body electric furnace transformer including the coil assembly.

[0006] The coil assembly of the double-body electric furnace transformer provided in this application includes:

[0007] A main transformer coil, the main transformer coil including a main transformer secondary coil, the main transformer secondary coil including a first double-pancake coil wound by a wire;

[0008] The series converter coil includes a series converter secondary coil, and the series converter secondary coil includes a second double-pancake coil wound by a wire. The wires of the first double-pancake coil and the second double-pancake coil are connected in pairs to form an 8-shaped coil structure.

[0009] Optionally, in the coil assembly of the above-mentioned double-body electric furnace transformer, the main transformer secondary coil includes a plurality of first double-pancake coils, and all the first double-pancake coils are stacked in sequence from bottom to top; the series transformer secondary coil includes a plurality of second double-pancake coils, and all the second double-pancake coils are stacked in sequence from bottom to top.

[0010] Optionally, in the coil assembly of the double-body electric furnace transformer, the wire connection positions of the main transformer secondary coil and the series transformer secondary coil are connected by threaded fasteners.

[0011] Optionally, in the coil assembly of the above-mentioned double-body electric furnace transformer, the main transformer secondary coil is the outermost coil of the main transformer coil, and the series transformer secondary coil is the outermost coil of the series transformer coil.

[0012] Optionally, in the coil assembly of the above-mentioned double-body electric furnace transformer, the coil assembly also includes a lead-out wire group, the lead-out wire group includes a lead-out wire, the first end of the lead-out wire is connected to the second end of the first double-pancake coil, and the second end of the lead-out wire serves as the lead-out end of the main transformer coil and is arranged on the same side as the second end of the second double-pancake coil as the lead-out end.

[0013] Optionally, in the coil assembly of the above-mentioned double-body electric furnace transformer, the second end of the lead wire serves as the outlet end of the main transformer coil and the second end of the second double-pancake coil serves as the outlet end and is located at one end of the series transformer secondary coil away from the main transformer secondary coil.

[0014] Optionally, in the coil assembly of the above-mentioned double-body electric furnace transformer, the number of the lead wires is the same as the number of wires in the second double-pancake coil, and they are connected one-to-one, and the lead wires are wound around the outer circumference of the string transformer secondary coil.

[0015] Optionally, in the coil assembly of the double-body electric furnace transformer, the conductive wires of the first double-pancake coil and the second double-pancake coil are led out horizontally in the coil width direction, and are connected in pairs to form the figure-8 coil structure.

[0016] A double-body electric furnace transformer comprises the coil assembly as described in any one of the above items.

[0017] Optionally, in the above-mentioned double-body electric furnace transformer, a plurality of coil assemblies are provided, and all the coil assemblies are arranged in sequence.

[0018] In the above technical solution, the coil assembly of the dual-body electric furnace transformer provided by the present invention includes a main transformer coil, a series transformer coil, and a lead wire assembly. The main transformer coil includes a main transformer secondary coil, which includes a first double-pancake coil wound with conductive wire. The series transformer coil includes a series transformer secondary coil, which includes a second double-pancake coil wound with conductive wire. The conductive wires of the first and second double-pancake coils are connected in pairs to form an 8-shaped coil structure. During assembly, both the main transformer secondary coil and the series transformer secondary coil are wound using a double-pancake method. Each double-pancake coil is an independent unit, wound separately, and then connected.

[0019] From the above description, it can be seen that in the coil assembly of the double-body electric furnace transformer provided in this application, the main transformer secondary coil and the series transformer secondary coil both adopt a double-pancake winding method. Each double-pancake coil is an independent unit and can be wound separately. The method has a simple structure, is easy to operate, and is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 A partial schematic diagram of a double-body electric furnace transformer provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the wiring position of the coil assembly provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic structural diagram of a coil assembly provided in an embodiment of the present invention.

[0024] in Figure 1-3 middle:

[0025] 1-main transformer coil, 11-main transformer secondary coil, 111-first double-pancake coil;

[0026] 2-series transformer coil, 21-series transformer secondary coil, 211-second double-pancake coil;

[0027] 3-lead wire set, 31-lead wire. DETAILED DESCRIPTION

[0028] The core of the present invention is to provide a coil assembly for a double-body electric furnace transformer, which has improved maintenance convenience. Another core of the present invention is to provide a double-body electric furnace transformer including the coil assembly.

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and implementation methods.

[0030] Please refer to Figures 1 to 3 .

[0031] In one specific embodiment, a coil assembly for a double-body electric furnace transformer provided by a specific embodiment of the present invention includes a main transformer coil 1 and a series transformer coil 2. The main transformer coil 1 includes a main transformer secondary coil 11, which includes a first double-pancake coil 111 wound with conductive wire. The series transformer coil 2 includes a series transformer secondary coil 21, which includes a second double-pancake coil 211 wound with conductive wire. The conductive wires of the first double-pancake coil 111 and the second double-pancake coil 211 are connected in pairs to form a figure-8 coil structure. Specifically, the first double-pancake coil 111 and the second double-pancake coil 211 can have two or at least three conductive wires.

[0032] As mentioned above, the main transformer secondary coil 11 and the series transformer secondary coil 21 are composed of the same number of double-pieces, each double-piece being an independent unit. During assembly, the main transformer secondary coil 11 and the series transformer secondary coil 21 are connected using coil wire (or conductive copper busbar).

[0033] like Figure 2 and Figure 3 As shown, in a specific embodiment, the first end of the first double-pancake coil 111 is connected to the first end of the second double-pancake coil. The lead-out wire group 3 includes a lead-out wire 31, the first end of the lead-out wire 31 is connected to the second end of the first double-pancake coil 111, and the second end of the lead-out wire 31 is set as the lead-out end of the main transformer coil and the second end of the second double-pancake coil as the lead-out end, wherein the same side is set to. Specifically, the second end of the first double-pancake coil 111 is connected to the lead-out wire 31 as the winding starting end, and the first end of the first double-pancake coil 111 is connected to the first end of the second double-pancake coil as the winding starting end.

[0034] The first and second ends of the first double-pancake coil 111 are arranged on the same side, facilitating connection with the second double-pancake coil and the lead wire 31. Specifically, the middle portion of the lead wire 31 is an arc-shaped structure that conforms to the outer periphery of the second double-pancake coil. Specifically, the first and second double-pancake coils 111 and 111 are wound in a roughly circular arc shape, minimizing the number of bends in the wires.

[0035] The second end of the lead wire 31 serves as the outgoing end of the main transformer coil 1 and the second end of the second double-pancake coil 211 serves as the outgoing end and is located at the end of the series transformer secondary coil 21 away from the main transformer secondary coil 11 .

[0036] Preferably, the wires are led out horizontally from the coil width, with two of them facing each other. Since the wires are led out horizontally from the coil width, that is, the coil width is consistent at the middle connection point of the coil assembly, no special spacers are required, which improves the convenience of operation.

[0037] It can be seen from the above description that in the coil assembly of the double-body electric furnace transformer provided in the specific embodiment of the present application, the middle part of the main transformer secondary coil 11 and the series transformer secondary coil 21 of the 8-shaped coil structure is disconnected, and each is connected after being assembled. That is, each first double-pancake coil 111 of the main transformer secondary coil 11 is an independent unit, and each second double-pancake coil 211 of the series transformer secondary coil 21 is an independent unit, which can be wound separately. The double-pancake coil is a common double-pancake winding method, and common wire molds and tooling can be used. The special winding tooling for the 8-shaped coil is no longer used, and the personnel are flexible to use. The method adopted by the present invention has a simple structure, is easy to operate, and is convenient for maintenance. On the basis of not increasing the product cost, it effectively improves the manufacturing efficiency of the coil and reduces the overall production and manufacturing cost of the transformer. The use of this structure can greatly reduce the procurement and manufacturing cost of this type of electric furnace transformer and improve its overall economic efficiency.

[0038] The main transformer secondary coil 11 includes multiple first double-pancake coils 111, all of which are stacked in a sequence from the outside inward. Specifically, the main transformer secondary coil 11 includes two or at least three first double-pancake coils 111. Specifically, the ends of two adjacent first double-pancake coils 111 are connected. Stacking all of the first double-pancake coils 111 in a sequence from the outside inward reduces the thickness of the main transformer secondary coil 11.

[0039] The series transformer secondary coil 21 includes multiple second double-pancake coils 211, which are stacked in a sequence from the outside inward. Specifically, the ends of two adjacent second double-pancake coils 211 are connected. This stacking of the second double-pancake coils 211 in a sequence from the outside inward reduces the thickness of the series transformer secondary coil 21.

[0040] Specifically, the series transformer secondary coil 21 includes two or at least three second double-pancake coils 211 .

[0041] The first double-pancake coil 111 and the second double-pancake coil 211 are wound in the same manner as the double-pancake coils. Figure 3 As shown, the double-pancake coil takes two wires as an example, which can be extended to 4, 6, etc. in actual use. Since the winding method of the double-pancake coil is an existing method, it will not be described in detail in this article.

[0042] The wire connections of the main transformer secondary coil 11 and the series transformer secondary coil 21 are connected by threaded fasteners. Specifically, the threaded fasteners can be bolts. The threaded fastener connection can firmly bind the coil assembly and improve the coil's short-circuit resistance.

[0043] For ease of wiring, the main transformer secondary coil 11 is the outermost coil of the main transformer coil 1. Of course, the series transformer secondary coil 21 can also be the outermost coil of the series transformer coil 2.

[0044] For ease of understanding, the following describes the winding of the main transformer secondary coil 11 and the series transformer secondary coil 21 according to the present invention. Figure 3 As shown, using a double-ply coil with two wires as an example, the left side shows a double-ply coil wound with the first double-ply coil 111, with each double-ply coil forming a unit; the right side shows a double-ply coil wound with the second double-ply coil 211, with each double-ply coil forming a unit. During the winding process, ensure that the wire leads of the first double-ply coil 111 and the wire leads of the second double-ply coil 211 are led out horizontally in the width of the coils, and that they are opposite each other.

[0045] After the winding of the main transformer secondary coil 11 is completed, it can be assembled with other coils to form the main transformer coil 1. After the winding of the series transformer secondary coil 21 is completed, it can be assembled with other coils to form the series transformer coil 2. Figure 1As shown, the main transformer coil 1 and the series transformer coil 2 are assembled as a whole, and the outgoing head needs to be reshaped again during assembly, and the wires are connected and fastened with bolts.

[0046] The double-body electric furnace transformer provided by the present application comprises any one of the coil assemblies. The specific structure of the coil assembly is described above, and the present application comprises the coil assembly and has the same technical effects.

[0047] As shown in the figure, Figure 1 The coil assembly is provided in multiple, and all the coil assemblies are arranged in sequence. Specifically, all the coil assemblies can be arranged in sequence in a linear manner, and specifically, all the coil assemblies are arranged in sequence in a straight line.

[0048] The double-body electric furnace transformer provided by the present application further comprises a mounting portion, and all the coil assemblies are integrated and mounted on the mounting portion. Specifically, all the coil assemblies are fixedly mounted on the mounting portion.

[0049] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coil assembly for a double-body electric furnace transformer, characterized in that: include: A main transformer coil (1), the main transformer coil (1) comprising a main transformer secondary coil (11), the main transformer secondary coil (11) comprising a first double-pancake coil (111) wound by a conducting wire; A series transformer coil (2), the series transformer coil (2) comprising a series transformer secondary coil (21), the series transformer secondary coil (21) comprising a second double-pancake coil (211) wound by a conductive wire, the conductive wires of the first double-pancake coil (111) and the second double-pancake coil (211) being connected in pairs to form an 8-shaped coil structure; The main transformer secondary coil (11) and the series transformer secondary coil (21) are composed of the same number of double cakes, each double cake being an independent unit; The lead connection positions of the main transformer secondary coil (11) and the series transformer secondary coil (21) are connected via threaded fasteners, wherein the threaded fasteners are bolts; The coil assembly further includes a lead wire group (3), the lead wire group (3) including a lead wire, the first end of the lead wire being connected to the second end of the first double-pancake coil (111), the second end of the lead wire being arranged as the lead wire end of the main transformer coil (1) and the second end of the second double-pancake coil (211) being arranged on the same side as the lead wire end; The conductive wires of the first double-pancake coil (111) and the second double-pancake coil (211) are led out horizontally in the coil width direction, and are connected in pairs to form the figure-8 coil structure; The second end of the lead wire serves as the lead-out end of the main transformer coil (1), and the second end of the second double-pancake coil (211) serves as the lead-out end and is located at one end of the string transformer secondary coil (21) away from the main transformer secondary coil (11).

2. The coil assembly of the double-body electric furnace transformer according to claim 1, characterized in that: The main transformer secondary coil (11) comprises a plurality of first double-pancake coils (111), and all the first double-pancake coils (111) are stacked sequentially from bottom to top; the series transformer secondary coil (21) comprises a plurality of second double-pancake coils (211), and all the second double-pancake coils (211) are stacked sequentially from bottom to top.

3. The coil assembly of the double-body electric furnace transformer according to claim 1, characterized in that: The main transformer secondary coil (11) is the outermost coil of the main transformer coil (1), and the series transformer secondary coil (21) is the outermost coil of the series transformer coil (2).

4. The coil assembly of the double-body electric furnace transformer according to claim 1, characterized in that: The number of the lead wires is the same as the number of the wires inside the second double-pancake coil (211), and they are connected in a one-to-one correspondence. The lead wires are wound around the outer periphery of the string transformer secondary coil (21).

5. A double-body electric furnace transformer, characterized in that: The invention comprises the coil assembly according to any one of claims 1 to 4.

6. The double-body electric furnace transformer according to claim 5, characterized in that: There are multiple coil assemblies, and all of the coil assemblies are arranged in sequence.

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