CN219303458U

CN219303458U - Three-phase winding of transformer

Info

Publication number: CN219303458U
Application number: CN202320713524.XU
Authority: CN
Inventors: 吕新华
Original assignee: Shandong Botai Electric Co ltd
Current assignee: Shandong Botai Electric Co ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-07-04
Anticipated expiration: 2033-03-30

Abstract

The utility model discloses a transformer three-phase winding, which comprises a bottom plate, a three-phase iron core and three coils, wherein the three-phase iron core comprises a lower iron core and an upper iron core which are mutually independent and are matched and overlapped with each other, the lower iron core comprises a lower yoke, a middle column and two side columns, the upper iron core comprises an upper yoke, the upper yoke is overlapped with the middle column and the two side columns of the lower yoke, the three coils are respectively sleeved on the middle column and the two side columns, and an upper cover plate which can be used for fixing the upper yoke on the lower yoke in a covering manner and is connected with the bottom plate through a connecting piece is arranged above the upper yoke; through setting up three-phase iron core into mutually independent and the lower iron core and the last iron core of cooperation overlap joint each other, when the installation coil, dismantle the yoke of going up to after the outside is the coil that is the tube-shape with the help of appurtenance with the cable winding, establish on side post and center pillar again direct cover, then take the yoke of going up down on the iron core, and fix with upper cover plate and connecting piece, improved the coiling and the installation effectiveness of coil greatly.

Description

Three-phase winding of transformer

Technical Field

The utility model belongs to the technical field of transformer windings, and particularly relates to a three-phase winding of a transformer.

Background

The transformer winding is the "heart" part of the transformer, i.e. the core component, which is required not only to meet the electrical strength requirements, but also to have sufficient mechanical strength. Compared with a double-winding transformer, the multi-phase winding transformer can obtain various voltages of a power station or a substation by one transformer, and reduces the cost, the running cost and the occupied area of the transformer. The most widely used of these are three-winding transformers, followed by four-winding transformers.

For a three-winding transformer, the winding is a three-phase winding, and according to the prior art, the utility model patent with the Chinese patent publication number of CN212257145U discloses a novel winding structure of a rectifier transformer, as shown in fig. 1, the novel winding structure comprises a bottom plate (a), a mounting plate (b) connected with the bottom plate (a) through a plug rod is arranged right above the bottom plate (a), an integrated three-phase iron core (c) is arranged between the bottom plate (a) and the mounting plate (b), and three groups of coils (d) are wound on the three-phase iron core.

In the prior art, like the three-phase winding of the technical scheme, the three-phase iron core is integrally manufactured, when the winding coil is installed on the three-phase iron core, only one circle of cable can be wound on the middle post and the side posts of the three-phase iron core in a surrounding manner to form the coil, the operation is very inconvenient, and particularly when the coil on the middle post of the three-phase iron core is wound, the winding is inconvenient because of the blocking of the side posts at the two sides, so that the winding efficiency is reduced.

Disclosure of Invention

In view of the defects and drawbacks existing in the prior art, the utility model aims to provide a three-phase winding of a transformer, which solves the problems that when a winding coil is installed on a three-phase iron core, only one coil of a cable can be directly wound on a middle column and side columns of the three-phase iron core to form the coil, the operation is very inconvenient, and particularly when the coil on the middle column of the three-phase iron core is wound, the winding is inconvenient due to the blocking of the side columns at two sides, and the winding efficiency is reduced.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a transformer three-phase winding, includes bottom plate, three-phase iron core and three coil, the three-phase iron core include mutually independent, and the lower iron core and the last iron core of cooperation overlap joint each other, lower iron core setting is fixed on bottom plate upper portion, including lower yoke and center pillar and two side posts of setting on lower yoke, last iron core include the yoke, the center pillar and the two side posts overlap joint of upper yoke and lower yoke, and the overlap joint face is 45 degrees inclined planes of slope, three coil overlap respectively establish on center pillar and two side posts, upper yoke top be equipped with the upper cover plate that can press it to fix on the yoke down, the upper cover plate including the length apron of cladding upper yoke upper half surface and the side cover plate at the cladding at the side post top of length apron both sides, upper cover plate and bottom plate pass through the connecting piece and connect.

As a further improvement of the utility model, the connecting piece comprises a plurality of connecting plates which are fixed on the upper cover plate, round holes are correspondingly arranged on the connecting plates and the bottom plate, and the connecting plates and the bottom plate are fixedly connected through long head bolts penetrating through the round holes and nuts sleeved on the long head bolts.

As a further development of the utility model, the long-head screw is arranged outside the coil.

As a further improvement of the utility model, the upper cover plate is box-shaped.

As a further improvement of the utility model, the cross section of the length cover plate is semi-circular.

As a further development of the utility model, the upper cover plate is made of an insulating material.

As a further improvement of the utility model, an embedding groove which can embed the lower yoke part is formed in the position of the lower iron core on the bottom plate.

As a further improvement of the utility model, the bottom of the upper yoke is provided with a symmetrical sharp corner opening at the position overlapping the center pillar

Compared with the prior art, the utility model has the following advantages:

1. the three-phase iron core is arranged to be a lower iron core and an upper iron core which are mutually independent and are matched and overlapped with each other, the lower iron core comprises a lower yoke, a side column and a middle column, the upper iron core comprises an upper yoke, the lower iron core and the upper iron core are connected and fixed through a bottom plate, a cover plate and a connecting piece, when a coil is installed, the upper yoke can be detached, a cable is directly sleeved on the side column and the middle column after being wound into a cylindrical coil by an auxiliary tool outside, then the upper yoke is lapped on the lower iron core and fixed by the upper cover plate and the connecting piece, so that the winding and installation efficiency of the coil is greatly improved, and the problems of inconvenience and low efficiency caused by directly winding the coil on the iron core are avoided; the upper cover plate can cover the tops of the upper yoke and the side columns, so that the upper yoke is accurately positioned and lapped on the lower iron core, and the matching and connecting effect of the upper yoke and the lower iron core is improved.

2. The connecting piece is in a structure of the connecting plate and the long head bolt, when the connecting piece is installed, the upper iron core is lapped on the lower iron core, then the upper cover plate is sleeved, and the connecting piece is fastened by the long head bolt penetrating through the connecting plate and the bottom plate, so that the operation is very simple and convenient; the long-head bolt is arranged on the outer side of the coil, so that interference between the long-head bolt and the coil is avoided.

3. Through setting up the upper cover plate into the box form, be convenient for wrap up the side column upside of iron core and lower iron core, improve the fixed connection and the location of iron core and lower iron core, reduce the skew of iron core.

4. The embedded groove is formed in the position of the lower iron core on the bottom plate, so that the lower iron core can be positioned and installed conveniently.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic diagram of the structure of the present utility model;

FIG. 3 is a schematic structural view of an upper cover plate;

in the figure: 1. a bottom plate; 2. a coil; 3. a three-phase iron core; 31. a lower iron core; 311. a lower yoke; 312. a center column; 313. a side column; 32. an upper iron core; 4. an upper cover plate; 41. a length cover plate; 42. an edge cover plate; 5. a connecting piece; 51. a connecting plate; 52. a round hole; 53. a long head bolt; 6. sharp corner openings.

Detailed Description

The utility model is described in further detail below with reference to fig. 2-3. For the sake of clarity, only the structures related to the utility model are shown in the drawings.

For convenience of description, the coordinate system is defined as shown in fig. 2, and the left-right direction is a transverse direction, the front-rear direction is a longitudinal direction, and the up-down direction is a vertical direction.

The embodiment of the utility model discloses a three-phase winding of a transformer. Referring to fig. 2, a three-phase winding of a transformer comprises a base plate 1, a three-phase iron core 3 and three coils 2, wherein the three-phase iron core 3 comprises a lower iron core 31 and an upper iron core 32 which are mutually independent and are matched and overlapped, the lower iron core 31 is fixedly arranged on the upper portion of the base plate 1, the lower iron core 31 specifically comprises a lower yoke 311, a middle column 312 and two side columns 313 which are arranged on the lower yoke 311, an embedded groove which can enable the lower yoke 311 to be partially embedded is formed in the position of the lower iron core 31 on the base plate 1, the lower iron core 31 is convenient to position and install and fix, and when the lower iron core 31 is installed, the lower yoke 311 of the lower iron core 31 is placed into the embedded groove and is connected through glue or bolt fastening. The upper iron core 32 comprises an upper yoke, the upper yoke is lapped with a middle column 312 and two side columns 313 of a lower yoke 311, the lapping surface is an inclined surface inclined by 45 degrees, a symmetrical sharp corner opening 6 is arranged at the lapping position of the bottom of the upper yoke and the middle column 312, during lapping, the top of the middle column 312 is inserted into the sharp corner opening 6, the three coils 2 are respectively sleeved on the middle column 312 and the two side columns 313, an upper cover plate 4 capable of fixing the upper yoke on the lower yoke 311 in a covering manner is arranged above the upper yoke, as shown in fig. 3, the upper cover plate 4 comprises a length cover plate 41 wrapping the upper half surface of the upper yoke and side cover plates 42 wrapping the top of the side columns 313 at two sides of the length cover plate 41, the upper cover plate 4 is made of an insulating material, the whole body is in a box shape, the upper side of the side columns 313 of the upper iron core 32 and the lower iron core 31 are conveniently wrapped, the fixed connection and the positioning of the upper iron core 32 and the lower iron core 31 are improved, and the offset of the upper iron core 32 is reduced. The length cover 41 is fitted to the upper half surface of the upper yoke and has a semicircular shape in cross section.

When the upper cover plate 4 is fixed, the upper cover plate 4 and the bottom plate 1 are connected through a connecting piece 5; as shown in fig. 2, the connecting piece 5 comprises a plurality of connecting plates 51 fixed on the upper cover plate 4, round holes 52 are correspondingly arranged on the connecting plates 51 and the bottom plate 1, the connecting plates 51 and the bottom plate 1 are fixedly connected through long-head bolts 53 penetrating through the round holes 52 and nuts sleeved on the long-head bolts 53, when the connecting piece is installed, the upper iron core 32 is lapped on the lower iron core 31, then the upper cover plate 4 is sleeved, and the connecting pieces are fastened through the long-head bolts 53 penetrating through the connecting plates 51 and the bottom plate 1, so that the operation is very simple and convenient; when the long-head bolt 53 is provided, the long-head bolt 53 is provided outside the coil 2 to avoid interference of the long-head bolt 53 with the coil 2.

The implementation process and the technical effect of the utility model are as follows: the cable is wound into the cylindrical three coils 2 by means of a tool outside, the upper iron core 32 is opened, then the cylindrical three coils 2 are sleeved on the side columns 313 and the middle columns 312 of the lower iron core 31, then the upper iron core 32 is lapped on the lower iron core 31, the upper cover plate 4 is covered, then the long-head bolt 53 passes through the bottom plate 1 and the connecting plate 51 and is screwed and fixed by nuts (not shown in the drawing), so that the winding and the installation of the coils 2 are greatly facilitated, the working efficiency is higher, and the problems of inconvenience and low efficiency caused by directly winding the coils 2 on the iron cores are avoided; and the upper cover plate 4 can cover the top of the upper yoke and the side column 313, so that the upper yoke is accurately positioned and lapped on the lower iron core 31, and the matching connection effect of the upper yoke and the lower iron core 31 is improved.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. It should be understood that the detailed description is presented for purposes of understanding only and is not intended to limit the utility model to all other embodiments that may be obtained by one skilled in the art without making any inventive effort.

Claims

1. The utility model provides a transformer three-phase winding, includes bottom plate, three-phase iron core and three coil, its characterized in that: the three-phase iron core include mutually independent, and the lower iron core of cooperation overlap joint and last iron core each other, lower iron core setting is fixed on bottom plate upper portion, including lower yoke and center pillar and two side posts of setting on the lower yoke, last iron core include the yoke, the center pillar and two side posts overlap joint of upper yoke and lower yoke, and the overlap joint face is 45 degrees inclined planes of slope, three coil overlap respectively establish on center pillar and two side posts, upper yoke top be equipped with the upper cover plate that can press its lid to fix on the lower yoke, the upper cover plate including the cladding at the upper half surface of upper yoke length apron and be in the cladding of length apron both sides at the side cover plate at the side post top, upper cover plate and bottom plate pass through the connecting piece and connect.

2. A transformer three-phase winding according to claim 1, characterized in that: the connecting piece include setting up a plurality of even boards of fixing on the upper cover plate, be equipped with the round hole on even board and the bottom plate corresponding, even board and bottom plate are connected fixedly through the long head bolt that passes the round hole and the nut of cover on the long head bolt.

3. A transformer three-phase winding according to claim 2, characterized in that: the long-head bolt is arranged on the outer side of the coil.

4. A transformer three-phase winding according to claim 1, characterized in that: the upper cover plate is box-shaped.

5. A transformer three-phase winding according to any one of claims 1-4, characterized in that: the cross section of the length cover plate is semicircular.

6. A transformer three-phase winding according to any one of claims 1-4, characterized in that: the upper cover plate is made of insulating materials.

7. A transformer three-phase winding according to any one of claims 1-4, characterized in that: the bottom plate is provided with an embedding groove which can enable the lower yoke part to be embedded in at the position where the lower iron core is arranged.

8. A transformer three-phase winding according to any one of claims 1-4, characterized in that: the bottom of the upper yoke is provided with a right-and-left symmetrical sharp corner opening at the position overlapping with the center pillar.