CN114743776A

CN114743776A - Dry-type transformer

Info

Publication number: CN114743776A
Application number: CN202210527223.8A
Authority: CN
Inventors: 郑坚勇; 凌斯; 方欣怡
Original assignee: Zhejiang Lingao Electrical Industrial Co ltd
Current assignee: Zhejiang Lingao Electrical Industrial Co ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-07-12

Abstract

The invention relates to the technical field of transformers, in particular to a dry-type transformer. A dry-type transformer, comprising: the body comprises a clamping piece, an inner connecting copper bar and an outer connecting copper bar which are arranged in sequence; and the clamping structure is fixedly connected with the clamping piece and is provided with a first channel and a second channel which are arranged side by side, the first channel is suitable for allowing the inner connecting copper bar to pass through and be attached to the inner connecting copper bar, and the second channel is suitable for allowing the outer connecting copper bar to pass through and be attached to the outer connecting copper bar. The invention solves the problem that the inner connecting copper bar or the outer connecting copper bar is deformed because the insulator is easy to break under the action of the electrodynamic force when the dry-type transformer bears a short-circuit test or sends a short-circuit condition in use.

Description

Dry-type transformer

Technical Field

The invention relates to the technical field of transformers, in particular to a dry-type transformer.

Background

Transformers are generally classified into dry transformers and wet transformers, and are widely applied to the fields of local lighting, high-rise buildings, airports, docks and the like.

The low-voltage winding of the dry-type transformer is generally wound by copper foil, an inner connecting copper bar is welded on the copper foil to be led out, then the copper foil is wound on a foil winding machine, when the specified number of layers is reached, an outer connecting copper bar is welded and led out, and then 3-4 layers of insulating paper are wound outside. In order to fix the upper clamping piece, the inner connecting copper bar and the outer connecting copper bar of the transformer, insulators are often arranged between the clamping piece and the inner connecting copper bar, between the inner connecting copper bar and the outer connecting copper bar for fixed connection, and the clamping piece and the inner connecting copper bar and the outer connecting copper bar are fixed through a single bolt, namely, the copper bars and the insulators are only fixedly connected through a point of the single bolt. When the dry-type transformer bears a short-circuit test or is in a short-circuit condition, the insulator is easy to break under the action of strong electric force, so that the internal connection copper bar or the external connection copper bar is deformed, and the phenomenon that the product is damaged due to disqualification of the short-circuit test is caused.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the problem that the insulator is easy to break under the action of strong electric force when the dry-type transformer in the prior art is subjected to a short-circuit test or is in a short-circuit condition in use, so that the internal connection copper bar or the external connection copper bar is deformed, thereby providing the dry-type transformer.

In order to solve the above problems, the present invention provides a dry-type transformer including:

the body comprises a clamping piece, an inner connecting copper bar and an outer connecting copper bar which are arranged in sequence;

and the clamping structure is fixedly connected with the clamping piece and is provided with a first channel and a second channel which are arranged side by side, the first channel is suitable for allowing the inner connecting copper bar to pass through and be attached to the inner connecting copper bar, and the second channel is suitable for allowing the outer connecting copper bar to pass through and be attached to the outer connecting copper bar.

Optionally, press from both sides tight structure including the first lead clamp, second lead clamp and the third lead clamp that set gradually, first lead clamp, second lead clamp and third lead clamp pass through fastener fixed connection, be equipped with first lead clamp between folder and interior linkage copper bar be equipped with the second lead clamp between interior linkage copper bar and the outer linkage copper bar, be formed with first passageway between first lead clamp and the second lead clamp, be formed with the second passageway between second lead clamp and third lead clamp.

Optionally, a first groove is formed in one side, close to the second lead clamp, of the first lead clamp, a second groove is formed in one side, close to the third lead clamp, of the second lead clamp, the first groove is attached to the plane of the second lead clamp to form the first channel, and the second groove is attached to the plane of the third lead clamp to form the second channel.

Optionally, the number of the first grooves and the second grooves is one.

Optionally, the lead clip is made of epoxy glass cloth.

Optionally, the clip includes a fixing plate and a connecting plate, the fixing plate is fixed on the body, and the connecting plate is fixedly connected to the first lead clip.

Optionally, the fixing plate is a U-shaped channel steel, and the connecting plate is a flat plate fixed in the opening of the fixing plate.

Optionally, at least one insulator is further arranged between the inner connecting copper bar and the outer connecting copper bar.

Optionally, a copper foil is further wound between the inner connecting copper bar and the outer connecting copper bar.

Optionally, the high-voltage coil and the inner connecting copper bar are respectively arranged on two sides of the outer connecting copper bar, and at least one fixing block is arranged between the high-voltage coil and the outer connecting copper bar.

The technical scheme of the invention has the following advantages:

1. the invention provides a dry-type transformer, comprising: the copper bar connector comprises a body, wherein a clamping piece, an inner connecting copper bar and an outer connecting copper bar are sequentially arranged on the body; the clamping structure is fixedly connected with the clamp, a first channel and a second channel are arranged side by side, the first channel is suitable for allowing an inner connecting copper bar to pass through and be attached to the first channel, the second channel allows an outer connecting copper bar to pass through and be attached to the second channel, the inner surface of the first channel is attached to the outer surface of the inner connecting copper bar, and the inner surface of the second channel is attached to the outer surface of the outer connecting copper bar. Because the copper bar passes through in the passageway, the fixed connection of face has increased area of contact with setting up of copper bar to the passageway. When meetting the short circuit, press from both sides tight structure and can receive the electrodynamic force and stop from the going on of a plurality of directions when vibrations appear at the copper bar, the resistance has effectively been strengthened to great area of contact in addition, electrodynamic force when can bearing the short circuit better, and the damage can not appear in the assurance test or in using to prevent to run into the short circuit and the unqualified problem appears when dry-type transformer is experimental or uses.

2. The invention provides a dry-type transformer, wherein a clamping structure comprises a first lead clamp, a second lead clamp and a third lead clamp which are sequentially arranged, the first lead clamp, the second lead clamp and the third lead clamp are fixedly connected through a fastening piece, the first lead clamp is arranged between the clamping piece and an inner connecting copper bar, the second lead clamp is arranged between the inner connecting copper bar and an outer connecting copper bar, a first channel is formed between the first lead clamp and the second lead clamp, a second channel is formed between the second lead clamp and the third lead clamp, the first channel is suitable for passing through the inner connecting copper bar, and the second channel is suitable for passing through the outer connecting copper bar. The fastener is used for fixing the first lead clamp, the second lead clamp and the third lead clamp into a whole.

3. According to the dry-type transformer, the first groove is formed in one side, close to the second lead clamp, of the first lead clamp, the second groove is formed in one side, close to the third lead clamp, of the second lead clamp, the number of the first groove and the number of the second groove are one, the first groove is attached to the plane of the second lead clamp to form the first channel, the second groove is attached to the plane of the third lead clamp to form the second channel, and the grooves are used for placing copper bars. The lead clamp is made of epoxy glass cloth plate material to play an insulating role.

4. The dry-type transformer provided by the invention comprises a fixed plate and a connecting plate which are fixedly connected, wherein the fixed plate is fixedly arranged on the body and is fixedly connected with the connecting plate, the fixed plate is a U-shaped channel steel, and the connecting plate is a flat plate fixed in an opening of the fixed plate. The fixed plate is connected with the body in order to realize, and the connecting plate is fixed with first lead clamp.

5. According to the dry-type transformer provided by the invention, at least one insulator is arranged between the inner connecting copper bar and the outer connecting copper bar and is used for insulation, so that the dry-type transformer plays a supporting and fixing role.

6. According to the dry-type transformer provided by the invention, the copper foil is wound between the inner connecting copper bar and the outer connecting copper bar to balance the point position gradient between the inner connecting copper bar and the outer connecting copper bar, so that the insulation breakdown accident caused by too large potential gradient is reduced.

7. The dry-type transformer further comprises a high-voltage coil, wherein the high-voltage coil and the inner connecting copper bar are respectively arranged on two sides of the outer connecting copper bar, at least one fixing block is arranged between the high-voltage coil and the outer connecting copper bar, and the fixing blocks play a role in fixing so as to prevent the high-voltage coil from displacing under the action of a short-circuit force.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a front view of a dry type transformer provided in an embodiment of the present invention;

fig. 2 is a plan view of a dry type transformer provided in an embodiment of the present invention.

Description of the reference numerals: 1. a body; 2. a fixing plate; 3. a connecting plate; 4. copper bars are connected in the inner part; 5. externally connecting copper bars; 6. an insulator; 7. a third lead clip; 8. a second lead clamp; 9. a first lead clamp; 10. copper foil; 11. a high voltage coil; 12. a fixed block; 13. a fastener.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

One embodiment of a dry-type transformer, as shown in fig. 1-2, includes: the body 1 of the clamping piece, the inner connecting copper bar 4 and the outer connecting copper bar 5 and the clamping structure fixedly connected with the clamping piece are sequentially arranged. Wherein, the body 1 is a dry-type transformer shell.

As shown in fig. 1 and 2, the clamping structure includes a first lead clamp 9, a second lead clamp 8 and a third lead clamp 7, which are sequentially disposed, wherein the first lead clamp 9 is disposed between the clamping piece and the inner connecting copper bar 4, the second lead clamp 8 is disposed between the inner connecting copper bar 4 and the outer connecting copper bar 5, a first groove is disposed on one side of the first lead clamp 9 close to the second lead clamp 8, and a second groove is disposed on one side of the second lead clamp 8 close to the third lead clamp 7. Specifically, the number of the first grooves and the number of the second grooves are both one. In order to penetrate through the copper bar, the first groove is attached to the plane of the second lead clamp 8 to form a first channel, and the first channel is suitable for being connected with the copper bar 4 through the inner part; the second groove is attached to the plane of the third lead clamp 7 to form a second channel, and the second channel is suitable for passing through the external connecting copper bar 5. In order to play an insulating role, the first lead clamp 9, the second lead clamp 8 and the third lead clamp 7 are all epoxy glass cloth plates. For fixing with the folder, all set up two through-holes that correspond the setting on first lead clamp 9, second lead clamp 8 and the third lead clamp 7, wear to be equipped with fastener 13 in each through-hole, fastener 13 passes folder and bolt again and carries out fixed connection. Specifically, the fastener 13 is a screw.

In order to fix the body 1 and the clamping structure, as shown in fig. 1 and 2, the clamping piece includes a fixing plate 2 and two connecting plates 3, wherein the fixing plate 2 is a U-shaped channel steel, the connecting plates 3 are flat plates, the fixing plate 2 is fixed on the body 1, and each connecting plate 3 is fixed at an opening of the fixing plate 2. Specifically, the connecting plate 3 is welded to the fixing plate 2.

In order to further fix the inner connecting copper bar 4 and the outer connecting copper bar 5, as shown in fig. 1, an insulator 6 is further disposed between the inner connecting copper bar 4 and the outer connecting copper bar 5. In order to equalize the point position gradient between the inner connecting copper bar 4 and the outer connecting copper bar 5, a copper foil 10 is wound between the inner connecting copper bar 4 and the outer connecting copper bar 5. For fixing the high-voltage coil 11, five fixing blocks 12 are also arranged between the high-voltage coil 11 and the external connecting copper bar 5. Specifically, the fixed block 12 is made of silica gel.

In the implementation, the first lead clamp 9, the second lead clamp 8 and the third lead clamp 7 are placed at the installation position, the fastening piece 13 penetrates through the through hole, and the nut is screwed to be tightened.

The dry-type transformer provided by the invention has the advantages that the lead clamp replaces the insulator 6 in the design and assembly, the electric power generated when the dry-type transformer is short-circuited can be well borne through the clamping and fixing of the lead clamp, the damage in the test or the use is avoided, and the dry-type transformer has high safety and is convenient to assemble.

As an alternative embodiment, the number of first grooves and second grooves may also be 2, 3 or even more.

Alternatively, the first lead clamp 9, the second lead clamp 8 and the third lead clamp 7 may be integrally formed, or two adjacent lead clamps of the three lead clamps may be integrally formed.

Alternatively, the first lead clip 9, the second lead clip 8, and the third lead clip 7 may be made of an insulating material such as laminated wood.

As an alternative embodiment, the number of connection plates 3 may also be 1, 3 or even more.

As an alternative embodiment, the number of insulators 6 may also be 2, 3 or even more.

As an alternative embodiment, the number of fixed blocks 12 may also be 1, 2 or even more.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.

Claims

1. A dry-type transformer, comprising:

the copper bar connector comprises a body (1), wherein the body (1) comprises a clamping piece, an inner connecting copper bar (4) and an outer connecting copper bar (5) which are sequentially arranged;

and the clamping structure is fixedly connected with the clamping piece and is provided with a first channel and a second channel which are arranged side by side, the first channel is suitable for allowing the inner connecting copper bar (4) to pass through and be attached to the first channel, and the second channel is suitable for allowing the outer connecting copper bar (5) to pass through and be attached to the second channel.

2. Dry-type transformer according to claim 1, characterized in that the clamping structure comprises a first lead clamp (9), a second lead clamp (8) and a third lead clamp (7) arranged in sequence, the first lead clamp (9), the second lead clamp (8) and the third lead clamp (7) are fixedly connected through a fastener (13), a first lead clamp (9) is arranged between the clamp and the inner connecting copper bar (4), a second lead clamp (8) is arranged between the inner connecting copper bar (4) and the outer connecting copper bar (5), a first channel is formed between the first lead clamp (9) and the second lead clamp (8), and a second channel is formed between the second lead clamp (8) and the third lead clamp (7).

3. Dry-type transformer according to claim 2, whereas the side of the first lead clamp (9) close to the second lead clamp (8) is provided with a first groove and the side of the second lead clamp (8) close to the third lead clamp (7) is provided with a second groove, the first groove fitting in the plane of the second lead clamp (8) to form the first channel and the second groove fitting in the plane of the third lead clamp (7) to form the second channel.

4. Dry transformer according to claim 3, whereas the number of first and second slots is one each.

5. Dry transformer according to claim 2, whereas the first (9), second (8) and third (7) lead clamps are epoxy glass cloth plates.

6. Dry transformer according to claim 2, whereas the clamp comprises a fixed plate (2) and a connection plate (3) being fixedly connected, the fixed plate (2) being fixedly arranged on the body (1), the connection plate (3) being fixedly connected with the first lead clamp (9).

7. Dry transformer according to claim 6, whereas the fixation plate (2) is a "U" -shaped channel and the connection plate (3) is a flat plate fixed in an opening of the fixation plate (2).

8. Dry-type transformer according to claim 1, characterized in that between the inner (4) and outer (5) coupling copper bars there is also provided at least one insulator (6).

9. Dry transformer according to claim 1, whereas between the inner (4) and outer (5) linking copper bars there is also wound a copper foil (10).

10. A dry transformer according to any of claims 1 to 9, further comprising a high voltage coil (11), wherein the high voltage coil (11) and the inner copper bar (4) are respectively disposed on both sides of the outer copper bar (5), and at least one fixing block (12) is disposed between the high voltage coil (11) and the outer copper bar (5).