CN209029220U

CN209029220U - A kind of oil-immersed transformer

Info

Publication number: CN209029220U
Application number: CN201821808361.9U
Authority: CN
Inventors: 黄伟
Original assignee: CHINA ZHONGBIAN GROUP SHANGHAI TRANSFORMER Co Ltd
Current assignee: CHINA ZHONGBIAN GROUP SHANGHAI TRANSFORMER Co Ltd
Priority date: 2018-11-05
Filing date: 2018-11-05
Publication date: 2019-06-25
Anticipated expiration: 2028-11-05

Abstract

The utility model proposes a kind of oil-immersed transformers, including oil-filled transformer body, iron core and three-phase coil winding are equipped with inside oil-filled transformer body, coil windings surround and are coated on the outside of iron core, and it is isolated between each coil windings by phase partition, phase partition two sides offset with the outer surface of coil windings respectively, coil windings include high-voltage winding and low pressure winding, low pressure winding is set on the outside of iron core, high-voltage winding is set on the outside of low pressure winding, by insulating board between low pressure winding and high-voltage winding, stay or corrugated board isolation, coaming plate is installed between coil windings and iron core, insulating board is equipped between coaming plate and iron core.In this application, lamination wood is replaced with insulating board in transformer body, shortens the distance between coil and iron core, reduces costs.

Description

A kind of oil-immersed transformer

Technical field

The utility model relates to field transformer more particularly to a kind of oil-immersed transformers.

Background technique

Transformer is the weight component in electric power power transmission and transformation system, and usage amount is very huge, the main function of transformer Mainly realized jointly by iron core, high-tension coil and low-voltage coil, in the currently used transformer, high-tension coil and Low-voltage coil collectively forms alternate winding, and is looped around on iron core, and is then isolated by spacing board between each phase winding.

It is equipped with lamination wood between coil windings and iron core, keeps the distance between coil windings and iron core excessive, is unfavorable for becoming The long-play of depressor, efficiency are not good enough.

Utility model content

The purpose of this utility model is to provide for a kind of oil-immersed transformer, is replaced in transformer body with insulating board Lamination wood, shortens the distance between coil and iron core, reduces cost.

To achieve the goals above, the utility model proposes a kind of oil-immersed transformer, including oil-filled transformer body, Iron core and three-phase coil winding are set inside the oil-filled transformer body, the coil windings surround and are coated on the iron core Outside, and between each coil windings by phase partition be isolated, the phase partition two sides respectively with the coil windings Outer surface offset, the coil windings are made of high-voltage winding and low pressure winding, and the low pressure winding is set in the iron core Outside, the high-voltage winding are set on the outside of the low pressure winding, by insulating board, support between the low pressure winding and high-voltage winding Item or corrugated board isolation, install coaming plate, set between the coaming plate and the iron core between the coil windings and the iron core There is insulating board.

Further, in the oil-immersed transformer, the coaming plate is in U-typed, and two blocks of coaming plates are opposite and side Edge overlap joint, the insulating board are set to the lap-joint of two blocks of coaming plates.

Further, in the oil-immersed transformer, the overlap joint size of the coaming plate should be 30~50mm.

Compared with prior art, the beneficial effects of the utility model are mainly reflected in: insulating board is used in transformer body Instead of lamination wood, the distance between coil and iron core are shortened, is reduced costs.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of oil-immersed transformer in the utility model；

Fig. 2 is A-A sectional structure chart in Fig. 1；

Fig. 3 is B-B sectional structure chart in Fig. 2；

Fig. 4 is the radial structural schematic diagram of Fig. 3 coil and iron yoke inserted sheet；

Fig. 5 is coaming plate overlapped structure structure chart in Fig. 2.

Wherein: upper clamping piece 11, lower clamping piece 12, upper yoke 21, lower yoke 22, iron core 3, pressing plate 41, cushion block 42, insulating end ring 43, coil windings 5, low pressure winding 51, high-voltage winding 52, winding protruding head 53, coaming plate 61, phase partition 62, insulating board 63.

Specific embodiment

It is described in more detail below in conjunction with oil-immersed transformer of the schematic diagram to the utility model, which show The preferred embodiment of the utility model, it should be appreciated that those skilled in the art can modify the utility model described herein, and Still the advantageous effects of the utility model are realized.Therefore, following description should be understood as the wide of those skilled in the art It is general to know, and it is not intended as limitations of the present invention.

In the description of the present invention, it should be noted that for the noun of locality, if any term " center ", " transverse direction ", " longitudinal direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The indicating positions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship are orientation based on the figure or position Relationship is set, narration the utility model is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning It must have a particular orientation, constructed and operated with particular orientation, should not be understood as the specific protection model for limiting the utility model It encloses.

In the present invention, except as otherwise clear stipulaties and restriction, if any term " assembling ", " connected ", " connection " term It should go to understand as broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It is also possible to machine Tool connection；It can be directly connected, be also possible to be connected by intermediary, can be and be connected inside two elements.For For those of ordinary skill in the art, can understand as the case may be above-mentioned term in the present invention specifically contain Justice.

The utility model is more specifically described by way of example referring to attached drawing in the following passage.According to following explanation, originally The advantages of utility model and feature will become apparent from.It should be noted that attached drawing is all made of very simplified form and uses non-essence Quasi- ratio, only to convenient, lucidly aid illustration the utility model embodiment purpose.

As shown in Figures 1 to 5, the utility model proposes a kind of oil-immersed transformer, including oil-filled transformer body, oil Iron core 3 and three-phase coil winding 5 are set inside immersion transformer body, coil windings 5, which are surround, is coated on 3 outside of iron core, and each It is isolated between coil windings 5 by phase partition 62, outer surface of 62 two sides of phase partition respectively with coil windings 5 offsets, line Circle winding 5 is made of high-voltage winding 52 and low pressure winding 51, and low pressure winding 51 is set in 3 outside of iron core, and high-voltage winding 52 is arranged In 51 outside of low pressure winding, it is isolated between low pressure winding 51 and high-voltage winding 52 by insulating board 63, stay or corrugated board, coil Coaming plate 61 is installed between winding 5 and iron core 3, insulating board 63 is equipped between coaming plate 61 and iron core 3.

Further, as shown in Fig. 2, in the present embodiment, high-voltage winding 52 and low pressure winding 51 are in oblong knot Structure is simultaneously coaxially distributed.As shown in figure 5, coaming plate 61 is in U-typed, two blocks coaming plate 61 is opposite and overlapping edges, insulating board 63 are set to The lap-joint of two blocks of coaming plates 61.The overlap joint size of coaming plate 61 should be 30~50mm.

Meanwhile a kind of specific installation step of above-mentioned oil-immersed transformer is as follows:

Step S1: disassembly upper clamping piece 11 and upper yoke 21；

Step S1.1: iron core 3 is clamped with iron core fixture；

Step S1.2: it removes and draws screw rod, unclamp the iron yoke screw rod of two sides；

Step S1.3: upper clamping piece 11 and clamp insulation are removed；

Step S1.4: upper yoke 21 is dismantled to using the iron core 3 of stacked on 21 technique of iron yoke；

Step S1.5: terminate the disassembly of upper yoke 21, remove iron core fixture；

Step S2: 5 pressing element of coil windings is removed；

Step S2.1: relief panel 41；

Step S2.2: check coil windings 5, the height of each coil windings 5 is consistent, the winding protruding head 53 of coil windings 5 and Tap the position alignment of outlet；

Step S2.3: winding protruding head 53 carries out insulating wrapping；Winding protruding head 53 wraps crimped paper, then packet parallel fabric after bending One layer of half lap of band.

Step S3: suit coil winding 5；

Step S3.1: cushion block 42 is put in 5 bottom side of coil windings, and suspension hook is symmetrically set to the lower section of cushion block 42, coil windings 5 with Cushion block 42 is fixed by symmetrically arranged two tied ropes, and suspension hook slings coil windings 5 using cushion block 42；

Step S3.2: it is leveled up using the surface that cardboard supports folder；

Step S3.3: coil windings 5 are sleeved on iron core 3, are confirmed the direction of winding protruding head 53, are existed along 3 circumference of iron core Coaming plate 61 is installed between coil windings 5 and iron core 3, phase partition 62 is installed between adjacent windings winding 5；Coil windings 5 are wrapped Include low pressure winding 51 and high-voltage winding 52,52 sets of high-voltage winding as low pressure winding 51 outside, low pressure winding 51 and high-voltage winding 52 Between be enclosed with insulating board 63, stay or corrugated board.

Step S3.4: the end of coil windings 5 is smooth, keeps upper clamping piece 11 parallel with lower clamping piece 12 and consistent apart from height；

Step S3.5: the insulation of assembly upper yoke 21 and pressing plate 41；

Step S4: upper yoke 21 carries out inserted sheet, and installs upper clamping piece 11；

Step S4.1: inserted sheet is successively carried out from side or among big grade separately to two sides inserted sheet step by step；By line before inserted sheet The airway of circle 5 upper end of winding is blocked, and utilizes " ∏ " clip to fasten when inserted sheet, extracts " ∏ " clevis using folder bolt after inserted sheet Son, and clamped upper yoke 21 by fastener.

Step S4.2: ground strip is installed after installation upper clamping piece 11, tenses the iron yoke screw rod of two sides, full wafer；3 diameter of iron core≤ When Φ 200mm, the insertion depth of ground strip is 30mm；When 3 diameter of iron core is 250~330mm of Φ, the insertion depth of ground strip is 50mm.Upper clamping piece 11 is insulated with iron core 3 by insulating end ring 43.

Step S4.3: ground strip is inserted into upper yoke 21 and lower yoke 22, and detects iron core 3 to upper clamping piece 11 and lower clamping piece 12 Whether insulate.

To sum up, in the present embodiment, the oil-immersed transformer of proposition, transformer body is interior to replace lamination with insulating board Wood shortens the distance between coil and iron core, reduces costs.

The preferred embodiment that above are only the utility model, does not play the role of any restrictions to the utility model. Any person of ordinary skill in the field, in the range of not departing from the technical solution of the utility model, to the utility model The technical solution and technology contents of exposure make the variation such as any type of equivalent replacement or modification, belong to without departing from the utility model Technical solution content, still fall within the protection scope of the utility model.

Claims

1. a kind of oil-immersed transformer, which is characterized in that including oil-filled transformer body, in the oil-filled transformer body Portion sets iron core and three-phase coil winding, and the coil windings surround and are coated on the outside of the iron core, and each coil windings Between be isolated by phase partition, outer surface of the phase partition two sides respectively with the coil windings offset, the coil Winding is made of high-voltage winding and low pressure winding, and the low pressure winding is set on the outside of the iron core, and the high-voltage winding is arranged On the outside of the low pressure winding, the low pressure winding is isolated between high-voltage winding by insulating board, stay or corrugated board, described Coaming plate is installed between coil windings and the iron core, insulating board is equipped between the coaming plate and the iron core.

2. oil-immersed transformer according to claim 1, which is characterized in that the coaming plate is in U-typed, two blocks of coaming plates Opposite and overlapping edges, the insulating board are set to the lap-joint of two blocks of coaming plates.

3. oil-immersed transformer according to claim 2, which is characterized in that the overlap joint size of the coaming plate should be 30~ 50mm。