CN206672786U - A kind of loop construction of three dimensional wound core casting dry type transformer - Google Patents

Abstract

The utility model discloses a kind of loop construction of three dimensional wound core casting dry type transformer, including winding former, the insulated conductor for being arranged on winding former and turning to line cake, the insulating materials being arranged on line cake, its coil shunting tap all leads to coil surface.Insulated conductor is directly wound on winding former, the imaginary stay position of coil is marked on winding former in advance as needed, to ensure that every section of insulated conductor bit positions are correct, then continuous coiling is started, the positive cake of coil and anti-cake are tightly got together during coiling, the insulation of the turn(s) insulation full utilization wire itself between cake.On the other hand the utility model provides a kind of technique for coiling of the loop construction of three dimensional wound core casting dry type transformer.Solve the problems, such as that prior art is present according to the loop construction of this three dimensional wound core casting dry type transformer of the present utility model, while optimize structure, reduce cost, improve transformer market competitiveness.

Description

A kind of loop construction of three dimensional wound core casting dry type transformer

Technical field

It the utility model is related to field transformer, more particularly to a kind of coil knot of three dimensional wound core casting dry type transformer Structure.

Background technology

At present, the advantage of three-dimensional wound core dry type transformer product has obtained the affirmative of users, but conventional stereo Rewinding material casting dry type transformer coil is mainly required for interlayer exhausted using layering drum type brake or sectional circular cartridge type, both structures Edge retains intersegmental electrical distance, thus to spend many insulating materials and increase the volume of coil, reduce the profit of coil With space, and coil must be by layer insulation come transferring heat energy when radiating, and coil radiating efficiency is low, in order to ensure coil Temperature rise meets the requirements, and must just increase the area of dissipation of coil, so as to add coil manufacture difficulty and manufacturing cost.

Utility model content

Technical problem to be solved in the utility model and the technical assignment proposed are that prior art is improved, there is provided A kind of loop construction of three dimensional wound core casting dry type transformer, solve in the prior art because layer insulation or reservation are intersegmental Coil radiating efficiency caused by electrical distance is low and the problems such as coil manufacture difficulty is big and manufacturing cost is high.

The utility model is as follows to solve the technical scheme that technical problem present in prior art is taken：

A kind of loop construction of three dimensional wound core casting dry type transformer, it includes winding former, is arranged on winding former simultaneously The insulated conductor of line cake, the insulating materials being arranged on line cake are turned to, its coil shunting tap all leads to coil table Face.

Preferably, insulating materials of the present utility model is epoxy resin.

Preferably, the mode coiling insulated conductor of positive cake, anti-cake continuous coiling is used to form line cake.

Preferably, the positive cake of coil and anti-cake are closely packed together.

Preferably, it is further provided with insulating barrier between line cake.

Further, the utility model provides a kind of coiling of the loop construction of three dimensional wound core casting dry type transformer Technique, it comprises the following steps：

A. the imaginary stay position of coil has been marked in advance on winding former；

B. insulated conductor is entered by the way of positive cake, anti-cake continuous coiling according to the imaginary stay position marked in advance Row coiling, positive cake, anti-cake abut during coiling；

C. coil shunting tap is all led into coil surface.

Preferably, technique for coiling further comprises setting at least one layer of insulating materials on the line cake made.

Preferably, the insulating materials set on online cake is epoxy resin.

Compared with prior art, the utility model has the advantage of：

1. eliminating the due internal diameter stay of continuous winding, section insulation cushion block, whole coil almost only uses tape insulation Wire composition, coil insulation material dosage only has the 10-20% for using structure domestic at present, saved a large amount of transformer costs. 2. making coil reduce the stop of insulation in radiation processes due to eliminating layer insulation, radiating efficiency is improved.3. remove Section insulation distance, so that coil in the case of same outer diameter, has the surface area of maximum, improve coil heat radiation energy Power.4. coil shunting tap all on-line circle surface is directly led out, avoid old structure coil part and lift one's head and draw in coil inside The process complexity gone out, improve productivity ratio and transformer station high-voltage side bus security.

Brief description of the drawings

Fig. 1 is the loop construction according to a kind of three dimensional wound core casting dry type transformer of the embodiment of the utility model one Structural representation.

Embodiment

In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing 1 and Embodiment, the utility model is described in further detail.It should be appreciated that specific embodiment described herein is only used To explain the utility model, the utility model is not limited to.

As shown in figure 1, a kind of loop construction of three dimensional wound core casting dry type transformer, it includes winding former, is arranged at On winding former and the insulated conductor 1 of line cake, the insulating materials 2 being arranged on line cake are turned to, in its coil shunting tap All on-line circle surface is directly led out.Three dimensional wound core casting dry type transformer is a kind of Power-saving-type Power Transformer, and it is created Property reformed traditional power transformer laminated magnetic line structure and three-phase layout, properties of product is more optimized.Generally adopt Main magnetic circuit is used as by the use of the iron core of silicon steel material.Magnetic field in coil can so more concentrated, transformer is compacter.Such as three-phase Magnetic circuit is full symmetric, oil-immersed transformer oil-immersed transformer power savings are notable, noise is big It is big reduce, radiating and overload capacity are stronger, compact-sized small volume etc..The iron core of three dimensional wound core casting dry type transformer is being set Prevent from reaching magnetic circuit saturation when meter, it is necessary to which designing some air gaps in magnetic circuit reduces saturation.The magnetic of three-dimensional rolled iron core It is completely consistent with the rolling direction of silicon steel sheet to change direction, and interlayer unshakable in one's determination does not have joining seam to meet Peng, the magnetic flux distribution of magnetic circuit everywhere is equal It is even, without obvious high resistance area, the distortion phenomenon without seam crossing magnetic flux density.The three dimensional wound core cast dry type of actual use Transformer core use is very thin, and the larger silicon steel plate stacking of resistance forms.The loss that every layer of vortex strip comes can so be reduced With caused heat.

According to the preferred embodiment of the utility model one, the insulating materials 2 is epoxy resin, and epoxy resin has good Physics, chemical property, its surface to metal and nonmetallic materials has excellent adhesive strength, and dielectric properties are good, become Shape shrinkage factor is small, and product size stability is good, and hardness is high, and pliability is preferable, to alkali and most of solvent-stable, applies in this reality With it is new it is middle can highly desirable extension coil service life.

According to the preferred embodiment of the utility model one, the coiling insulated conductor 1 by the way of positive cake, anti-cake continuous coiling To form line cake.

According to the preferred embodiment of the utility model one, the positive cake and anti-cake of coil closely, in the absence of gap.

According to another preferred embodiment of the utility model, insulating barrier is further provided between line cake.

According to the preferred embodiment of the utility model one, all on-line circle surface in its coil shunting tap is directly drawn Go out, such technique for causing coil winding is simplified, while is taken out and connect due to part point in loop construction of the prior art Head internally draw and cause to have potential safety hazard and increase process complexity, be unfavorable for coils in transformers structure around System.Therefore the technical scheme that the present embodiment proposes is that highly desirable solve problem of the prior art, improves production efficiency.

According to the utility model more specifically embodiment：As shown in figure 1, loop construction uses similar continuous winding knot Structure, positive cake, anti-cake continuous coiling, but it eliminates the due inside and outside footpath stay of continuous winding, section insulation cushion block.Insulation Wire 1 is directly wound on winding former, the imaginary stay position of coil has been marked on winding former in advance as needed, to ensure every section The bit positions of insulated conductor 1 are correct, then start continuous coiling, and the positive cake of coil and anti-cake are tightly got together during coiling, between cake The insulation of wire itself is fully utilized in turn(s) insulation, and any insulation need not be placed again between the offline cake of normal condition（Strengthen intentionally exhausted Except edge）.

According to an embodiment of the present utility model, insulated conductor 1 uniformly hermetically wraps up one layer and not led in wire periphery The material of electricity, such as：Resin, plastics, silicon rubber, PVC etc., insulating barrier is formed, prevents the electric conductor of insulated conductor 1 from being contacted with the external world The accidents such as electric leakage, short circuit, electric shock are caused to occur.

According to the embodiment of the utility model another aspect, there is provided a kind of line of three dimensional wound core casting dry type transformer The technique for coiling of coil structures, it comprises the following steps：A. the imaginary stay position of coil has been marked in advance on winding former；B. root By the way of positive cake, anti-cake continuous coiling coiling, coiling are carried out to insulated conductor 1 according to the imaginary stay position that has marked in advance When positive cake, anti-cake abut；C. coil shunting tap is all led into coil surface.

According to a kind of loop construction of three dimensional wound core casting dry type transformer of an embodiment of the present utility model around Technique processed further comprises setting at least one layer of insulating materials 2 on the line cake made.Preferably, set exhausted on online cake Edge material 2 is epoxy resin.

This structure relatively has very big advantage with existing structure：Whole coil almost only uses the insulated conductor of tape insulation 1 composition, coil insulation material dosage only have the domestic 10-20% for using structure at present.Due to eliminating layer insulation or intersegmental exhausted Edge distance, so that coil in the case of same outer diameter, has the surface area of maximum, to meet the radiating needs of coil. Coil shunting tap all on-line circle surface is directly led out, and operating procedure is simple, is avoided old structure coil part and is lifted one's head online The internal caused potential safety hazard drawn of circle and process complexity.

Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed, But can not be therefore understands that being the limitation to the utility model patent scope.It should be pointed out that the common skill for this area For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.

Claims (5)

1. A kind of 1. loop construction of three dimensional wound core casting dry type transformer, it is characterised in that：Including winding former, it is arranged at coiling On mould and turn to the insulated conductor of line cake（1）, the insulating materials that is arranged on line cake（2）, its coil shunting tap whole Lead to coil surface.
2. A kind of 2. loop construction of three dimensional wound core casting dry type transformer according to claim 1, it is characterised in that：Institute State insulating materials（2）For epoxy resin.
3. A kind of 3. loop construction of three dimensional wound core casting dry type transformer according to claim 1, it is characterised in that：Adopt With positive cake, the mode coiling insulated conductor of anti-cake continuous coiling（1）To form line cake.
4. A kind of 4. loop construction of three dimensional wound core casting dry type transformer according to claim 3, it is characterised in that：Line The positive cake and anti-cake of circle are closely packed together.
5. A kind of 5. loop construction of three dimensional wound core casting dry type transformer according to claim 3, it is characterised in that：Line Insulating barrier is further provided between cake.