CN212676055U

CN212676055U - Transformer yoke insulation structure

Info

Publication number: CN212676055U
Application number: CN202021497093.0U
Authority: CN
Inventors: 张华松; 戚威; 赵宏伟; 张冰杰
Original assignee: Liaoning Huaye Group Development Co Ltd
Current assignee: Liaoning Huaye Group Development Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-03-09
Anticipated expiration: 2030-07-24

Abstract

The utility model provides a transformer yoke insulation system suitable for special environment, includes the insulating of yoke left and right sides, the insulating and yoke middle insulation of yoke front and back side. The left side and the right side of the yoke are insulated and comprise a first paper board and a first cushion block, the lower portion of the first paper board is tightly attached to the left side and the right side of the transformer coil, and the first cushion block on the upper portion of the first paper board is tightly pressed by clamping piece transverse plates on the left side and the right side of the iron yoke. The front and rear side insulators of the iron yoke comprise a second paper board and a second cushion block, the lower portion of the second paper board is tightly attached to the front and rear sides of the transformer coil, and the second cushion block on the upper portion of the second paper board is tightly pressed by long clamping pieces on the front and rear sides of the iron yoke. The middle insulation of the iron yoke comprises a third paper board and a third cushion block, the lower part of the third paper board is tightly attached to the connection part of two-phase coils in the three-phase coils of the transformer, and the third cushion block at the upper part is tightly pressed by the iron yoke. The method has the characteristics of simple processing technology, convenient installation, high production efficiency, large contact area of the cushion block, strong short-circuit resistance and the like, and is particularly suitable for regions with moist environment and weak industrial foundation such as Africa.

Description

Transformer yoke insulation structure

Technical Field

The utility model relates to a transformer technical field, in particular to transformer yoke insulation system suitable for special environment.

Background

The insulation structure of the iron yoke of the current oil-immersed transformer is shown in fig. 10-12, and is generally composed of paper rings and 6 pad blocks. The structure has the advantages of various cushion blocks, nonstandard paper ring shape, more required machining equipment, large equipment investment, complex machining process, more generated waste, small pressing area and low production efficiency. The requirements of modern high-efficiency production and short-circuit resistance of the transformer cannot be met, so that the best effect cannot be achieved in the manufacturing and running of products. Particularly, the African industry is weak in foundation, processing equipment is backward, technical workers are uneven in level, the processing capacity is poor, the conventional iron yoke insulation structure is more difficult to process and produce at present, the precision of parts is difficult to guarantee, and in addition, moisture absorption of insulation parts in the overall damp and hot environment of the African region can generate great deformation, so that the assembly is difficult, and the structural shape of the insulation part needs to be improved.

Disclosure of Invention

In order to solve the technical problem that the background art provided, the utility model provides a transformer yoke insulation system suitable for special environment has overcome the processing complicacy among the traditional yoke insulation system, easy deformation and transformer short circuit resistance can not enough, provides a rational in infrastructure yoke insulation system, and it is simple to have a processing technology, simple to operate, and production efficiency is high, and cushion area of contact is big, characteristics such as anti short circuit ability reinforce, especially is suitable for the regions that environment humidity such as africa and industrial basis are weak.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a transformer yoke insulation system suitable for special environment, the transformer include coil, yoke and the folder around the yoke, yoke insulation system include the insulating of yoke left and right sides, the insulating and yoke middle insulation of side around the yoke.

The left side and the right side of the iron yoke are insulated and comprise first paperboards and first cushion blocks, the first cushion blocks are adhered to the upper surface of the first paperboards, spacing distances are reserved among the first cushion blocks, the lower portions of the first paperboards are tightly attached to the left side and the right side of the end portion of the transformer coil during installation, and the first cushion blocks on the upper portions are pressed by clamping piece transverse plates on the left side and the right side of the iron yoke.

The front and rear sides of the iron yoke are insulated and comprise second paperboards and second cushion blocks, the second cushion blocks are adhered to the upper surfaces of the second paperboards, spacing distances are reserved among the second cushion blocks, the lower portions of the second paperboards are tightly attached to the front and rear sides of the end portion of the transformer coil during installation, and the second cushion blocks on the upper portions are tightly pressed by long clamping pieces on the front and rear sides of the iron yoke.

The middle insulation of the iron yoke comprises a third paperboard and a third cushion block, the third cushion blocks are adhered to the upper surface of the third paperboard, a spacing distance is reserved between the third cushion blocks, the lower portion of the third paperboard clings to the connecting portion of two-phase coils in three-phase coils at the end portion of the transformer coil during installation, and the third cushion block at the upper portion is pressed by the iron yoke.

Further, the first paperboard, the second paperboard and the third paperboard are all rectangular paperboards.

Furthermore, 3 grooves are formed in one side of the long side of the rectangle of the second paper board, and are wire outlet spaces reserved for three-phase wiring terminals.

Furthermore, the first cushion block, the second cushion block and the third cushion block are all cuboid paper cushion blocks.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a rectangle cardboard and cuboid cushion all be regular shape, processing technology is simple, and the commonality is strong, simple to operate to, the structure of cardboard and cushion is firm, non-deformable, and the area of contact of cardboard and cushion is big, and anti short circuit ability is strong. The defects of complex processing, easy deformation and short circuit resistance of the transformer in the traditional iron yoke insulation structure are overcome, and the method is particularly suitable for regions with moist environment, high insulation grade requirement and weak industrial foundation such as Africa.

Drawings

Fig. 1 is a side view of the overall structure of the transformer of the present invention;

FIG. 2 is a view showing the position of the yoke according to the present invention;

fig. 3 is a top view of the overall structure of the transformer of the present invention;

fig. 4 is a top view of the left and right side insulating structures of the iron yoke of the present invention;

FIG. 5 is a front view of the insulating structure of the left and right sides of the yoke according to the present invention;

fig. 6 is a top view of the front and rear insulating structures of the iron yoke of the present invention;

FIG. 7 is a front view of the front and rear insulation structures of the iron yoke of the present invention;

fig. 8 is a top view of the intermediate insulating structure of the iron yoke according to the present invention;

fig. 9 is a front view of the intermediate insulation structure of the iron yoke of the present invention;

fig. 10 is a top view of the overall structure of a prior art transformer as mentioned in the background art;

fig. 11 is a top view of a prior art yoke insulation structure as referred to in the background art;

fig. 12 is a front view of a related art iron yoke insulation structure mentioned in the background art.

In the figure: 1-yoke 2-coil 3-long clamp (channel steel clamp) 4-clamp transverse plate 5-yoke left and right side insulation 51-first paper plate 52-first cushion block 6-yoke front and back side insulation 61-second paper plate 62-second cushion block 63-groove 7-yoke middle insulation 71-third paper plate 72-third cushion block 8-prior art yoke insulation 81-paper ring (prior art yoke insulation) 82-cushion block one (prior art yoke insulation) 83-cushion block two (prior art yoke insulation) 84-cushion block three (prior art yoke insulation) 85-cushion block four (prior art yoke insulation) 86-cushion block five (prior art yoke insulation) 87-cushion block six (prior art yoke insulation).

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1 to 3, a yoke insulation structure of a transformer suitable for a special environment, the transformer includes a coil 2, a yoke 1, and clips 3 and 4 around the yoke, and the yoke insulation structure includes a yoke left and right side insulation 5, a yoke front and rear side insulation 6, and a yoke middle insulation 7.

As shown in fig. 3 to 5, the left and right insulation 5 of the yoke includes a first paper plate 51 and a first spacer block 52, the first spacer blocks 52 are adhered to the upper surface of the first paper plate 51 with a spacing therebetween, when the transformer coil is mounted, the lower portion of the first paper plate 51 is closely attached to the left and right sides of the end portion 2 of the transformer coil, and the first spacer blocks 52 at the upper portion are pressed by the clamp horizontal plates 4 at the left and right sides of the yoke 1.

As shown in fig. 3, 6 and 7, the front and rear insulators 6 of the yoke include a second paper board 61 and a second pad 62, the second pads 62 are adhered to the upper surface of the second paper board 61 with a spacing distance therebetween, when the transformer coil is mounted, the lower portion of the second paper board 61 is tightly attached to the front and rear sides of the end portion 2 of the transformer coil, and the second pads 62 at the upper portion are tightly pressed by the long clamping members 3 at the front and rear sides of the yoke 1.

As shown in fig. 3, 8 and 9, the yoke intermediate insulator 7 includes a third board 71 and a third pad 72, wherein a plurality of third pads 72 are adhered to an upper surface of the third board 71 with a space therebetween, and when the yoke is mounted, a lower portion of the third board 71 is closely attached to a portion where two coils of three-phase coils of the transformer coil end 2 are connected, and the upper third pad 72 is pressed by the yoke 1.

As shown in fig. 4-9, the first paper board 51, the second paper board 61 and the third paper board 71 are all rectangular paper boards. As shown in fig. 6, one side of the long side of the rectangle of the second paper board 61 is further provided with 3 grooves 63, which are wire outlet spaces reserved for three-phase terminals.

As shown in fig. 4-9, the first block 52, the second block 62, and the third block 72 are all rectangular parallelepiped paper blocks.

The old conventional yoke insulator 8 structure shown in fig. 10-12 is composed of a

paper ring

81 and 6 kinds of spacers 82-87. The structure has various cushion blocks, the paper ring 81 has a nonstandard shape, more mechanical processing equipment is needed, the equipment investment is large, the processed paperboard cushion block generates waste, the processing difficulty is higher, and even the paper ring cannot be installed if the process control is not good; the contact surfaces of the cushion blocks 82-87 and the coil 2 are small, the pressing force is insufficient, and the short-circuit resistance is weak; this is more obvious for africa with a lagging process base, and the traditional iron yoke insulation 8 structure needs to be innovated and simplified. The utility model discloses a rectangle cardboard and cuboid cushion all be regular shape, processing technology is simple, and the commonality is strong, simple to operate to, the structure of cardboard and cushion is firm, non-deformable, and the area of contact of cardboard and cushion is big, and anti short circuit ability is strong. The defects of complex processing, easy deformation and short circuit resistance of the transformer in the traditional iron yoke insulation structure 8 are overcome, and the method is particularly suitable for regions such as Africa with humid environment, high insulation grade requirements and weak industrial foundation.

The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation processes are given, but the protection scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.

Claims

1. A transformer yoke insulation structure, the said transformer includes coil, yoke and clamp around the yoke, characterized by that, the said yoke insulation structure includes the insulating left and right sides of yoke, insulating and yoke middle insulating in front and back sides of yoke;

the left and right insulation of the iron yoke comprises a first paperboard and first cushion blocks, the first cushion blocks are adhered to the upper surface of the first paperboard, a spacing distance is reserved between the first cushion blocks, the lower part of the first paperboard is tightly attached to the left and right sides of the end part of the transformer coil during installation, and the first cushion blocks at the upper part are tightly pressed by clamping piece transverse plates at the left and right sides of the iron yoke;

the front and rear side insulation of the iron yoke comprises a second paperboard and second cushion blocks, the second cushion blocks are adhered to the upper surface of the second paperboard, a spacing distance is reserved between the second cushion blocks, the lower portion of the second paperboard is tightly attached to the front and rear sides of the end portion of the transformer coil during installation, and the second cushion blocks on the upper portion are tightly pressed by long clamping pieces on the front and rear sides of the iron yoke;

2. The transformer yoke insulation structure of claim 1, wherein the first, second and third sheets are rectangular sheets.

3. The transformer yoke insulation structure of claim 2, wherein one side of the long side of the rectangle of the second paper board is further provided with 3 grooves which are wire outlet spaces reserved for three-phase terminals.

4. The transformer yoke insulation structure of claim 1, wherein the first, second and third blocks are all rectangular paper blocks.