CN217114080U - Three-dimensional wound core transformer - Google Patents

Abstract

The utility model discloses a three-dimensional iron core transformer of rolling up, including three-dimensional iron core transformer of rolling up, include: the winding device comprises a triangular support frame, a wound core assembly and a reinforcing coil; the triangular support frame comprises a long channel steel, a short channel steel and a pulling plate, the long channel steel and the short channel steel are sequentially spliced end to form a closed frame, and the pulling plate is welded at the edge of the lower side of the short channel steel; each wound iron core of the wound iron core assembly is arranged in a delta shape, is in a triangular structure and is fixed on the triangular support frame; the reinforcing coils are wound on the core posts of the wound iron cores respectively; the triangular support frame comprises an upper support frame and a lower support frame; the wound iron core assembly is fixed on the lower support frame; the upper support frame is fixed on the wound core assembly. The utility model discloses can make the no-load loss of product low, reach energy-conserving effect, promote transformer structural strength, make the sudden short circuit ability reinforcing of bearing of product.

Description

A three-dimensional wound iron core transformer

technical field

The utility model relates to the technical field of transformers, in particular to a three-dimensional wound iron core transformer.

Background technique

The three-dimensional wound iron core transformer has the characteristics of small reluctance, low no-load loss, remarkable energy saving effect, low noise, compact structure and small size, and is being widely used. When a short circuit occurs in the operation of the transformer, the coil flows a large current during the short circuit, and under the action of the leakage magnetic field, the coil is subjected to electromagnetic force. According to the left hand rule. Under the action of the transverse leakage magnetic field, the high and low voltage coils are subjected to electromagnetic tensile force in the axial direction.

The coil of the three-dimensional wound iron core transformer with triangular structure is circular, but because the low-voltage coil of the general three-dimensional wound iron core transformer uses a combination of multiple electromagnetic wires and is wound in parallel, a helix angle is formed at the end after the winding is completed, and the low-voltage coil is under the transverse leakage magnetic field. If a large axial force is received, if there is no effective treatment, it is easy to cause the axial collapse of the coil. At this time, since the core is three-dimensionally spliced in a triangular arrangement after winding, the axial clamping force of the coil cannot be guaranteed, resulting in a three-dimensional wound core transformer. The ability to withstand sudden short circuit is poor.

The coils of the traditional three-dimensional wound iron core transformers are conventionally wound, without reinforcement treatment, and the axial impact resistance is poor; secondly, the structural supports are lightweight carbon steel materials, and the general steel parts are welded and spliced, which has poor strength and long production process. , the cost is high, and it is not environmentally friendly. After technical treatment, it is hung into the oil tank and assembled into an oil-immersed transformer. Most of the current oil-immersed transformers use a flat laminated core structure, which has relatively high no-load loss and poor short-circuit resistance.

Utility model content

In view of this, the purpose of the embodiments of the present invention is to provide a three-dimensional wound iron core transformer, which can reduce the no-load loss of the product, achieve the effect of energy saving, improve the structural strength of the transformer, and enhance the ability of the product to withstand sudden short circuits.

In a first aspect, an embodiment of the present utility model provides a three-dimensional wound iron core transformer, which includes: a triangular support frame, a wound iron core assembly and a reinforcing coil.

The triangular support frame includes a long channel steel, a short channel steel and a pull plate, the long channel steel and the short channel steel are joined end to end to form a closed frame, and the pull plate is welded on the lower side of the short channel steel. edge.

Each wound iron core of the wound iron core assembly is arranged in a zigzag shape, has a triangular structure, and is fixed on the triangular support frame.

There are several reinforcing coils, which are respectively wound on the stem of each of the wound iron cores.

In conjunction with the first aspect, an embodiment of the present invention provides a first possible implementation of the first aspect, wherein the triangular support frame includes an upper support frame and a lower support frame.

The wound iron core assembly is fixed on the lower support frame.

The upper support frame is fixed on the wound iron core assembly.

In conjunction with the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, which further includes a coil fixing assembly.

The coil fixing assembly includes an insulating support block.

There are two insulating support blocks, which are respectively fixed between the wound iron core assembly and the upper support frame, and between the wound iron core assembly and the lower support frame.

In conjunction with the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the coil fixing assembly further includes a middle-pulling screw and a side-pulling screw.

The middle pull screw passes through the upper support frame, the long channel steel and the lower support frame in sequence, and the two ends are locked by bolts.

The side pulling screw rod passes through the upper support frame, the short channel steel and the lower support frame in sequence, and the two ends are locked by bolts.

In combination with the first aspect, the embodiment of the present invention provides a fourth possible implementation of the first aspect, wherein the upper support frame includes an upper long channel steel, an upper short channel steel, an upper pull plate and an upper reinforcing rib plate .

The upper long channel steel and the upper short channel steel are sequentially spliced end to end to form a closed frame.

The upper pull plate is welded to the edge of the lower side of the upper short channel steel.

The upper reinforcing rib plate is welded to connect the upper short channel steel and the upper pull plate.

In combination with the first aspect, the embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein the lower support frame includes a lower long channel steel, a lower short channel steel, a pull-down plate and a lower reinforcing rib plate.

The lower long channel steel and the lower short channel steel are sequentially spliced end to end to form a closed frame.

The lowering plate is welded to the edge of the lower side of the lower short channel steel.

The lower reinforcing rib plate is welded to connect the lower short channel steel and the pull-down plate.

In conjunction with the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the lower support frame further includes a foot pad and a pad block.

The pads are supported on three ends of the closed frame in a trident shape.

The spacers are fixed at the central intersection of the feet.

In conjunction with the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the reinforcing coil includes an epoxy barrel skeleton, a low-voltage winding, a high-voltage winding, and an oil channel stay.

The low-voltage winding is wound on the epoxy drum skeleton.

The oil passage stays are arranged inside the low-voltage winding and outside the low-voltage winding.

The high-voltage winding is wound outside the low-voltage winding.

In conjunction with the first aspect, the embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein the outer portion of the reinforcing coil is axially fastened by a bandage.

The wrapping tape adopts polyester tape or glass fiber adhesive tape.

With reference to the first aspect, an embodiment of the present invention provides a ninth possible implementation manner of the first aspect, wherein the wires of the low-voltage winding include single or multiple parallel-wound magnet wires.

A low-voltage lead wire is drawn from the upper end of the wire.

The low-voltage lead wire is pre-bent in the first turn that is pulled out, and an insulating plate is used to fill the bending gap.

The beneficial effects of the embodiment of the present utility model are:

The utility model adopts the three-dimensional wound iron core structure with the optimal magnetic circuit, so that the no-load loss of the product is low, and the energy saving effect is achieved; the utility model adopts a triangular support frame for fixing, the winding epoxy frame is supported, the winding end is flatly wound, and the coil is axially wound. The polyester tape or glass fiber adhesive tape is fastened to enhance the structural strength of the transformer and enhance the product's ability to withstand sudden short circuits.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the assembly structure schematic diagram of the utility model three-dimensional wound iron core transformer;

2 is a schematic top view of the three-dimensional wound iron core transformer of the present invention;

3 is a schematic diagram of the structure of the upper support frame of the three-dimensional wound iron core transformer of the present invention;

Fig. 4 is the top-view structure schematic diagram of the upper support frame of the three-dimensional wound iron core transformer of the present invention;

5 is a schematic structural diagram of the lower support frame of the three-dimensional wound iron core transformer of the present invention;

6 is a schematic top view of the lower support frame of the three-dimensional wound iron core transformer of the present invention;

7 is a schematic diagram of a reinforced coil structure of a three-dimensional wound iron core transformer of the present invention;

FIG. 8 is a schematic top view structure diagram of a reinforced coil of a three-dimensional wound iron core transformer of the present invention;

9 is a schematic diagram of the winding structure of a low-voltage winding in the prior art;

10 is a schematic diagram of the winding structure of the low-voltage winding of the three-dimensional wound iron core transformer of the present invention.

In the picture: 1- low voltage lead wire; 2- wrapping tape; 3- high voltage winding; 4- low voltage winding; 5- epoxy cylinder skeleton; 6- oil channel stay; 8- terminal insulation; 9- wire; 10- reinforced coil ; 11-insulation plate; 14- trapezoidal end insulation; 20-upper support frame; 21-upper long channel steel; 22-upper short channel steel; 23-upper pull plate; 24-upper rib plate; 30-lower supporter ;31-Lower long channel; 32-Lower short channel; 33-Block; 34-Lower short channel; 35-Draw down plate; 40-Wound iron core assembly; 41-Insulation support block; 43- Side pull screw.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.

Referring to FIGS. 1 to 8 and 10 , an embodiment of the present invention provides a three-dimensional wound iron core transformer, which includes a triangular support frame, a wound iron core assembly 40 and a reinforcing coil 10 .

The triangular support frame includes a long channel steel, a short channel steel and a pull plate, the long channel steel and the short channel steel are joined end to end to form a closed frame, and the pull plate is welded on the lower side of the short channel steel. edge.

Each wound iron core of the wound iron core assembly 40 is arranged in a zigzag shape, has a triangular structure, and is fixed on the triangular support frame.

There are several reinforcing coils 10 , which are respectively wound on the stem of each of the wound iron cores.

In conjunction with the first aspect, the embodiment of the present invention provides a first possible implementation of the first aspect, wherein the triangular support frame includes an upper support frame 20 and a lower support frame 30 .

The wound iron core assembly 40 is fixed on the lower support frame 30 .

The upper support frame 20 is fixed on the wound iron core assembly 40 .

In conjunction with the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, which further includes a coil fixing assembly.

The coil fixing assembly includes an insulating support block 41 .

There are two insulating support blocks 41 , which are respectively fixed between the wound iron core assembly 40 and the upper support frame 20 and between the wound iron core assembly 40 and the lower support frame 30 .

In combination with the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the coil fixing assembly further includes a middle-pulling screw 42 and a side-pulling screw 43 .

The middle pull screw 42 passes through the upper support frame 20, the long channel steel and the lower support frame 30 in sequence, and the two ends are locked by bolts.

The side pull screw 43 passes through the upper support frame 20 , the short channel steel and the lower support frame 30 in sequence, and both ends are locked by bolts.

In combination with the first aspect, the embodiment of the present invention provides a fourth possible implementation of the first aspect, wherein the upper support frame 20 includes an upper long channel steel 21, an upper short channel steel 22, an upper pull plate 23 and Upper stiffener plate 24 .

The upper long channel steel 21 and the upper short channel steel 22 are sequentially spliced end to end to form a closed frame.

The upper pull plate 23 is welded to the edge of the lower side of the upper short channel steel 22 .

The upper reinforcing rib plate 24 is welded to connect the upper short channel steel 22 and the upper pulling plate 23 .

In combination with the first aspect, the embodiment of the present utility model provides a fifth possible implementation of the first aspect, wherein the lower support frame 30 includes a lower long channel steel 31, a lower short channel steel 34, a pull-down plate 35 and a lower Reinforcing rib plate 36 .

The lower long channel steel 31 and the lower short channel steel 34 are sequentially spliced end to end to form a closed frame.

The pull-down plate 35 is welded to the edge of the lower side of the lower short channel steel 34 .

The lower reinforcing rib plate 36 is welded to connect the lower short channel steel 34 and the pull-down plate 35 .

In combination with the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the lower support frame 30 further includes a pad 32 and a pad 33 .

The feet 32 are supported on three ends of the closed frame in a trident shape.

The spacers 33 are fixed at the central intersection of the feet 32 .

In combination with the first aspect, the embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the reinforcing coil 10 includes an epoxy cylinder skeleton 5, a low-voltage winding 4, a high-voltage winding 3 and an oil channel stay 6.

The low-voltage winding 4 is wound on the epoxy drum skeleton 5 .

The oil passage stays 6 are arranged inside the low-voltage winding 4 and outside the low-voltage winding.

The high-voltage winding 3 is wound outside the low-voltage winding 4 .

In conjunction with the first aspect, the embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein the outer portion of the reinforcing coil 10 is fastened by the binding tape 2 in the axial direction.

The wrapping tape 2 is a polyester tape or a glass fiber adhesive tape.

In conjunction with the first aspect, the embodiment of the present invention provides a ninth possible implementation manner of the first aspect, wherein the wires 9 of the low-voltage winding 4 include single or multiple electromagnetic wires wound in parallel.

The upper end of the wire 9 leads out the low-voltage lead 1 .

The low-voltage lead wire 1 is pre-bent in the first turn that is pulled out, and an insulating plate 11 is used to fill the bending gap.

After such pretreatment, the end of the low-voltage winding 4 becomes flat, and can be fixed by the square end insulation 8, and the flat winding of the end can eliminate the influence of the leakage magnetic field of the helix angle of the coil end, and ensure the strength and reliability of the product .

As shown in FIG. 9 , in the prior art, the end of the wire 9 forms a helix angle, and the more magnet wires are wound, the larger the helix angle, and finally the end is fixed by trapezoidal end insulation 14 .

The embodiment of the present utility model aims to protect a three-dimensional wound iron core transformer, and has the following effects:

1. The interior of the coil of the present invention adopts an epoxy cylinder skeleton, which can withstand the radial contraction force when the product is short-circuited and improve the operating reliability of the product.

2. The utility model improves the winding method of the coil, and the flat winding at the end eliminates the influence of the magnetic leakage of the helix angle, and improves the strength of the coil and the ability to withstand short circuits.

3. The utility model reinforces the outer axial direction of the coil with polyester tapes, so as to increase the axial impact force when the coil is short-circuited.

4. The utility model adopts the support and fixation of the triangular structure, and the product has a strong ability to withstand sudden short circuits.

Finally, it should be noted that the above-mentioned embodiments are only specific implementations of the present utility model, and are used to illustrate the technical solutions of the present utility model, rather than restricting them, and the protection scope of the present utility model is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art who is familiar with the technical field within the technical scope disclosed by the present invention can still record the descriptions in the foregoing embodiments. Modifications or changes can be easily imagined in the technical solutions, or equivalent replacements are made to some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention, All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A three-dimensional wound iron core transformer, characterized in that, comprising: a triangular support frame, a wound iron core assembly (40) and a reinforcing coil (10); The triangular support frame includes a long channel steel, a short channel steel and a pull plate, the long channel steel and the short channel steel are joined end to end to form a closed frame, and the pull plate is welded on the lower side of the short channel steel. edge; Each wound iron core of the wound iron core assembly (40) is arranged in a zigzag shape, has a triangular structure, and is fixed on the triangular support frame; There are several reinforcing coils (10), which are respectively wound on the stem of each of the wound iron cores. 2. The three-dimensional wound iron core transformer according to claim 1, characterized in that, The triangular support frame includes an upper support frame (20) and a lower support frame (30); the wound iron core assembly (40) is fixed on the lower support frame (30); The upper support frame (20) is fixed on the wound iron core assembly (40). 3. The three-dimensional wound iron core transformer according to claim 2, characterized in that, Also includes a coil fixing assembly; The coil fixing assembly includes an insulating support block (41); There are two insulating support blocks (41), which are respectively fixed between the wound iron core assembly (40) and the upper support frame (20), and the wound iron core assembly (40) and the lower support frame (30). 4. The three-dimensional wound iron core transformer according to claim 3, characterized in that, The coil fixing assembly further comprises a middle-pulling screw (42) and a side-pulling screw (43); The middle pull screw (42) passes through the upper support frame (20), the long channel steel and the lower support frame (30) in sequence, and both ends are locked by bolts; The side pull screw (43) passes through the upper support frame (20), the short channel steel and the lower support frame (30) in sequence, and both ends are locked by bolts. 5. The three-dimensional wound iron core transformer according to claim 2, characterized in that, The upper support frame (20) comprises an upper long channel steel (21), an upper short channel steel (22), an upper pulling plate (23) and an upper reinforcing rib plate (24); The upper long channel steel (21) and the upper short channel steel (22) are sequentially spliced end to end to form a closed frame; The upper pull plate (23) is welded on the edge of the lower side of the upper short channel steel (22); The upper reinforcing rib plate (24) is welded to connect the upper short channel steel (22) and the upper pulling plate (23). 6. The three-dimensional wound iron core transformer according to claim 2, wherein The lower support frame (30) comprises a lower long channel steel (31), a lower short channel steel (34), a lowering plate (35) and a lower reinforcing rib plate (36); The lower long channel steel (31) and the lower short channel steel (34) are sequentially spliced end to end to form a closed frame; The pull-down plate (35) is welded on the edge of the lower side of the lower short channel steel (34); The lower reinforcing rib plate (36) is welded to connect the lower short channel steel (34) and the pull-down plate (35). 7. The three-dimensional wound iron core transformer according to claim 6, characterized in that, The lower support frame (30) further comprises a pad (32) and a pad (33); The pads (32) are supported on three ends of the closed frame in a trident shape; The cushion block (33) is fixed at the central intersection of the cushion feet (32). 8. The three-dimensional wound iron core transformer according to claim 1, characterized in that, The reinforcing coil (10) includes an epoxy cylinder skeleton (5), a low-voltage winding (4), a high-voltage winding (3) and an oil passage stay (6); The low-voltage winding (4) is wound on the epoxy cylinder skeleton (5); The oil passage stays (6) are arranged inside the low-voltage winding (4) and outside the low-voltage winding; The high-voltage winding (3) is wound outside the low-voltage winding (4). 9. The three-dimensional wound iron core transformer according to claim 8, wherein The outer part of the reinforcing coil (10) is fastened in the axial direction by the bandage (2); The wrapping tape (2) adopts polyester tape or glass fiber adhesive tape. 10. The three-dimensional wound iron core transformer according to claim 8, characterized in that, The wires (9) of the low-voltage winding (4) include single or multiple electromagnetic wires wound in parallel; A low-voltage lead (1) is drawn from the upper end of the wire (9); The low-voltage lead wire (1) is pre-bent in the previous turn drawn out, and an insulating plate (11) is used to fill the bending gap.

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