Coil structure of electric furnace transformer
Through the design of double-cake low-voltage coil structure and insulating straps, the problem of longitudinal interleaving arrangement of low-voltage terminals of single-phase electric furnace transformers is solved, and the longitudinal phase sequence arrangement of low-voltage terminals is realized, which simplifies user usage and manufacturing processes and reduces material losses and space occupation, while enhancing structural stability.
Patent Information
- Application Number
- CN202323353758.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-08
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-08
AI Technical Summary
The vertical interleaving arrangement of the low-voltage first-end outlet terminals of existing single-phase electric furnace transformers is complicated, which increases manufacturing cost and user connection difficulty, and wastes materials and time.
Adopt a double cake low-voltage coil structure, through the parallel design of the A-pillar 8-shaped coil and the X-pillar 8-shaped coil, it is fixed and tied with insulating straps, and changes the winding direction of the X-pillar 8-shaped coil, so that the head and end terminals are separated left and right, and longitudinally The phase sequence arrangement of the direction is consistent, and the low-voltage terminals are connected through the busbar row and the soft copper belt to achieve the phase sequence arrangement of the longitudinal direction.
It simplifies the wiring process of the user, reduces the internal space of the transformer, avoids the cross-conductive tube structure, reduces material loss, and fixes the jumper segment through comb-shaped insulated braces, eliminating the impact of electric power vibration on the coil.
Smart Images
Figure CN222260752U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of transformer production, in particular to a double-pancake low-voltage coil structure of an electric furnace transformer. Background Art
[0002] At present, the low-voltage first and last outgoing terminals of single-phase electric furnace transformers are arranged in a staggered manner vertically, such as Figure 1-Figure 3 As shown, this arrangement is complex, with the transformer low-voltage terminals internal conductive tubes cross-crossed (see Figure 3 ) and external phase sequence cross arrangement. The cross arrangement of the first and last terminal conductive tubes inside the transformer will inevitably increase the internal space of the transformer and increase the manufacturing cost; the cross arrangement of the first and last terminal outside the transformer will increase the difficulty of connecting the user's short network side, which is time-consuming and labor-intensive, and wastes short network materials. It is a consumption for both transformer manufacturing and user use. Summary of the invention
[0003] The utility model aims to provide a coil structure of an electric furnace transformer, which can separate the first and last terminals into left and right parts, arrange the phase sequence in the longitudinal direction in a consistent manner, and reduce material loss.
[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions:
[0005] A coil structure of an electric furnace transformer comprises an A-column 8-shaped coil and an X-column 8-shaped coil. The first end a and the last end x of the A-column 8-shaped coil are on the lower cake of the same double cake unit; the first end a and the last end x of the X-column 8-shaped coil are respectively on the upper cake and the lower cake of the same double cake unit.
[0006] It also includes insulating braces, and the jumper sections of the X-pillar 8-shaped coil and the A-pillar 8-shaped coil between the main transformer body and the auxiliary transformer body are all fixed and tied by insulating braces.
[0007] The insulating stay is a comb-shaped integrated structure, comprising a support plate and a tooth plate, wherein a plurality of tooth plates are fixedly connected to the support plate at equal intervals.
[0008] It also includes a busbar, a soft copper strip, and a low-voltage terminal. The first end a and the last end x of the A-pillar 8-shaped coil and the X-pillar 8-shaped coil are connected to the busbar, and then led to the low-voltage terminal by the soft copper strip. The low-voltage terminals are arranged in a consistent phase sequence in the longitudinal direction.
[0009] Compared with the prior art, the beneficial effects of the utility model are:
[0010] The coil structure of the electric furnace transformer changes the winding direction of the X-column 8-shaped coil, so that the two coils connected in parallel on the A-column 8-shaped coil and the X-column 8-shaped coil have different winding directions, achieving consistent phase sequence arrangement in the longitudinal direction of the low-voltage output terminal, which is convenient for users to use.
[0011] The coil structure of the electric furnace transformer realizes that the low-voltage and high-current head and terminal terminals do not need to be arranged in a staggered manner, but the head and terminal terminals are classified and separated, which greatly facilitates the wiring on the short network side of the user.
[0012] The coil structure of the electric furnace transformer is applied to the single-phase electric furnace transformer. After the A-pillar 8-shaped coil and the X-pillar 8-shaped coil are wound, the insulating brace is used to fix the reinforcement structure to realize the parallel connection of the A-pillar and X-pillar low-voltage coils of the electric furnace transformer, and the low-voltage terminal phase sequence classification arrangement is realized through the busbar connection, without staggering, which greatly facilitates user use. At the same time, there is no need to use a cross structure inside the conductive tube, which reduces the size of the oil tank and thus reduces the internal space of the transformer. The insulating brace adopts a comb-like structure to avoid short circuit of the wire. At the same time, it can fix the cross section of the jumper segment to eliminate the influence of electrodynamic vibration on the coil during operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural diagram of a single-phase electric furnace transformer.
[0014] Figure 2 yes Figure 1 K-direction view.
[0015] Figure 3 It is a schematic diagram of the coil structure of the original single-phase electric furnace transformer.
[0016] Figure 4 It is a structural schematic diagram of the utility model.
[0017] Figure 5 yes Figure 4 H-direction view.
[0018] Figure 6 This is a schematic diagram of the double-pancake coil outlet arrangement.
[0019] Figure 7 This is a schematic diagram of the winding structure of the A-pillar 8-shaped coil.
[0020] Figure 8 It is a schematic diagram of the winding structure of the X-column 8-shaped coil.
[0021] Fig. 9 This is the front view of the insulating stay.
[0022] Fig.10 It is a top view of the insulating stay.
[0023] In the figure: 1-A column 8-shaped coil 2-X column 8-shaped coil 3-busbar 4-soft copper strip 5-low voltage terminal 6-insulating support bar 7-main transformer body 8-auxiliary transformer body 9-internal cross structure of conductive tube 10-staggered arrangement of first and last terminals 11-oil channel 12-lower cake 13-upper cake 61-support plate 62-tooth plate. DETAILED DESCRIPTION
[0024] The present invention is described in detail below in conjunction with the accompanying drawings of the specification, but it should be noted that the implementation of the present invention is not limited to the following embodiments.
[0025] See Figure 4 , Figure 6 The coil structure of the electric furnace transformer includes an A-column 8-shaped coil 1 and an X-column 8-shaped coil 2. The first end a and the last end x of the A-column 8-shaped coil 1 are on the lower cake 12 of the same double-cake unit; the first end a and the last end x of the X-column 8-shaped coil 2 are respectively on the upper cake 13 and the lower cake 12 of the same double-cake unit.
[0026] The coil structure of the electric furnace transformer also includes an insulating brace 6. The crossover wire section of the A-column 8-shaped coil between the main transformer body and the auxiliary transformer body is fixed and tied with an insulating brace. Similarly, the crossover wire section of the X-column 8-shaped coil between the main transformer body and the auxiliary transformer body is fixed and tied with an insulating brace. Fig. 9 , Fig.10 The insulating stay 6 is a comb-shaped integrated structure, and the comb-shaped insulating stay 6 includes a support plate 61 and a tooth plate 62. A plurality of tooth plates 62 are fixedly connected to the support plate 61 at equal intervals, and the distance between the tooth plates 62 matches the wire diameter.
[0027] The jumper wire sections of the X-pillar 8-shaped coil and the A-pillar 8-shaped coil between the main transformer body and the auxiliary transformer body are fixed and tied by insulating braces.
[0028] Example
[0029] See Figure 4 , Figure 6 Taking a single-phase electric furnace transformer as an example, its double-pancake low-voltage coil includes an A-column 8-shaped coil 1 and an X-column 8-shaped coil 2. The existing X-column 8-shaped coil 2 structure is changed. The first end a and the last end x of the X-column 8-shaped coil 2 are respectively on the upper pancake 13 and the lower pancake 12 of the same double-pancake unit. The A-column 8-shaped coil 1 remains unchanged, that is, the first end a and the last end x of the A-column 8-shaped coil 1 are on the lower pancake 12 of the same double-pancake unit, so that the order of the A-column 8-shaped coil 1 and the X-column 8-shaped coil 2 from left to right is a, x. Figure 4 .
[0030] The A-pillar 8-shaped coil 1 and the X-pillar 8-shaped coil 2 are connected in parallel, and the directions of the induced magnetic lines of force must be consistent on the magnetic circuit, so that the winding directions of the two-pillar coils are different, and the exit positions are also different.
[0031] like Figure 7 , Figure 8As shown, the A-pillar 8-shaped coil 1 is wound rightward, with the first end a and the last end x both coming out of the lower pan 12, and the beginning and the end are open leads; the X-pillar 8-shaped coil 2 is wound leftward, with the first end a coming out of the lower pan 12, and the last end x coming out of the upper pan 13, and the beginning and the end are closed leads. The first and last ends of the A-pillar 8-shaped coil 1 and the X-pillar 8-shaped coil 2 are connected to the busbar 3, and then led to the low-voltage terminal 5 by the soft copper strip 4, so that the external low-voltage terminal 5 is arranged longitudinally in a classified manner, without the need for a canine tooth staggered arrangement, to achieve Figure 5 The low voltage terminals shown are arranged in a consistent phase sequence in the longitudinal direction.
[0032] See Figure 4 The transformer of a single-phase electric furnace is often in a short-circuit state, and the electric force will affect the coil. After the A-pillar 8-shaped coil 1 and the X-pillar 8-shaped coil 2 are assembled, the insulating stay 6 is inserted into the middle jumper wire section of the A-pillar 8-shaped coil 1 and the X-pillar 8-shaped coil 2, and fixed and tied to make it firm and stable. The insulating stay 6 adopts a comb-like structure to separate the wires to avoid short circuits. At the same time, it can fix the cross-section of the jumper wire section to eliminate the influence of the electric force vibration on the coil during operation.
[0033] The utility model changes the winding direction of the X-column 8-shaped coil 2, so that the winding directions of the two parallel coils on the A-column 8-shaped coil 1 and the X-column 8-shaped coil 2 are different, so that the phase sequence of the low-voltage outlet terminal in the longitudinal direction is consistent, and the first and last terminals are connected ( Figure 5 The low-voltage terminals 5 of a and x) shown in the figure are separated to the left and right, which is convenient for users to use. In addition, the size of the raised seat between the low-voltage terminal and the coil is shortened from 450mm to 260mm by adopting the structure of the utility model. Figure 3 , Figure 4 , the size of the lift seat is shortened, thereby reducing the overall size of the fuel tank.
Claims
1. A coil structure of an electric furnace transformer, characterized in that: It includes an A-pillar 8-shaped coil and an X-pillar 8-shaped coil. The first end a and the last end x of the A-pillar 8-shaped coil are on the lower cake of the same double-cake unit; the first end a and the last end x of the X-pillar 8-shaped coil are respectively on the upper cake and the lower cake of the same double-cake unit.
2. The coil structure of an electric furnace transformer according to claim 1, characterized in that: It also includes insulating braces, and the jumper sections of the X-pillar 8-shaped coil and the A-pillar 8-shaped coil between the main transformer body and the auxiliary transformer body are fixed and tied by insulating braces.
3. The coil structure of an electric furnace transformer according to claim 2, characterized in that: The insulating stay is a comb-shaped integrated structure, comprising a support plate and a tooth plate, wherein a plurality of tooth plates are fixedly connected to the support plate at equal intervals.
4. The coil structure of an electric furnace transformer according to claim 1, characterized in that: It also includes a busbar, a soft copper strip, and a low-voltage terminal. The first end a and the last end x of the A-pillar 8-shaped coil and the X-pillar 8-shaped coil are connected to the busbar, and then led to the low-voltage terminal by the soft copper strip. The low-voltage terminals are arranged in a consistent phase sequence in the longitudinal direction.