CN2113541U - High pressure foil type coil without pouring together - Google Patents

Abstract

The utility model relates to a high pressure foil type coil without pouring together, mainly comprises a foil conductor, an interlayer insulation, an insulating bumper pad and a shaft radially fastening device. Thermosetting material including resin, etc. Which are adopted by two ends of each coil can the coil can be poured together to form a fastening end coil. The coil can be radially towards an inner outside without pouring and can be tied and fastened through a supporting coil and a rubber belt. The utility model has the advantages of easy fabrication, convenient adjustment, no purpose-made mould, low cost, etc., and can be widely used for various high-voltage coils of an air insulating transformer, an aerating insulating transformer, an oil immersion insulating transformer, an electric reactor and a mutual inductor.

Description

High pressure foil type coil without pouring together

The utility model is a kind of high pressure foil coil that is not cast in together, belongs to the Coil technique in the H01F technical field in the IPC classification.The high pressure winding that is particularly useful for range transformer, reactor, instrument transformer.

In the prior art, the high pressure foil coil of using in the transformer industry has two kinds of forms: thin insulating casting type and heavy insulation casting type.The coil of these two kinds of patterns all is that each section foil coil with coiled is placed on and pours into an integral body in the special mould, just the thickness difference of cast.The coil of these two kinds of patterns make with operation on have a following critical defect: the 1 different special corresponding mould of coil needs, surcharge increase; 2 each coil mould of all will packing into is poured into a mould, mould at least the production time long, mould surcharge at most increases, and the maintenance of mould and stacking is a problem very much; 3 coils that expend after more mould material and the cast might ftracture and operating bursting, and can't keep in repair; 4 occur being difficult for repairing when difference causes D.C. resistance uneven when intersegmental connection; In case 5 certain section have the problem whole winding to scrap.To the heavy insulation casting type, usually the radiating condition of coil is poor, the width of cloth is big to size, house transformer size, weight, cost, loss increase, efficient reduce.

The purpose of this utility model is to overcome the deficiencies in the prior art, works out a kind of novel high-pressure foil coil that foil coil filling rate height is convenient to the characteristics of automated production but also is overcome existing high pressure foil coil shortcoming at all that not only made full use of.This coil not only can be used as the high pressure winding of dry type air-insulated transformer, also can be used as the high pressure winding of inflation or oil-immersed type transformer, reactor, instrument transformer.

The utility model provides is not cast in together high pressure foil coil, mainly is made up of foil conductor, layer insulation, buffer insulation pad and the radial fastener of axle.In order just to protect axially intensity and section insulation, at first every section end, the film of the interim looping of the inboard support ring and the outside by coil forms natural norm, then thermosetting material is poured into this mould and is formed fastening pad through being heating and curing, and plays and insulate and fastening effect.Each section coil after the end cast is dropped on together with one heart, intersegmentally separate, and be strained and fixed by folder from top to bottom and just form a complete winding with the buffer insulation pad.Intersegmental lead-in wire couples together by crimping, welding, binding method.

Every section inboard support ring of coil constitutes the part of " natural norm " on the one hand, and on the other hand, it still is the guarantor of the width of cloth to intensity.This support ring will have enough mechanical strengths for this reason, can select thick dipping lacquer paper web of 1～3mm or polyester tube for use, and tube exceeds about 3～5mm than the every limit of foil conductor.After choosing tube, under permanent tension force with foil conductor and layer insulation around thereon.After coil winds, again at the thick polyester adhesive tape of outside looping 1～2mm.Make the intensity of each coil segment of coiled approach a steel body, can tolerate the width of cloth to reaching axial tensile force.Layer insulation exceeds about 2～3mm than the every limit of foil conductor.Next, place which floor blended rubber band in the coil outboard end with film and be stained with the interim mould in formation outside.The height of interim mould is not less than the height of inboard natural norm.Can pour thermosetting material into this mould this moment, and it is high identical that the inboard support ring of the height of cast and coil stretches out, and being heating and curing the coil segment after pouring into a mould afterwards, mould material just sticks together with support ring, foil conductor and layer insulation.Remove the interim mould of outside afterwards, the coil turn-over is poured into a mould another side with method.Two end faces pouring into a mould in this coil mainly play the role of fastening, and therefore pouring into a mould thickness gets 3～5mm(without exception for foil conductor, and layer insulation is higher by 2～3mm) than paper tinsel, and section insulation reaches by the buffer insulation pad of selecting different-thickness.Because the fastening pad in end is the guarantor of axis of winding intensity, so the formation of " natural norm " is one step of key that the utility model is implemented.

Each section play terminal head and shunting tap is vertical with end face draws, in order to increase creepage distance, the arrangement that plays terminal and shunting tap certain distance that can stagger.

When the big needs of capacity increase area of dissipation, air flue cage ring that can ready-made and inboard support ring is contour is around coil appointed positions place, when adding, add around one deck and support ring with high film so that it becomes the natural norm of air flue outer coil at its outer surface around cage ring.Earlier the joint of this film and cage ring is stained with then separately cast before the cast with adhesive tape.

In order to finish the purpose of this utility model better, selecting for use of material, as long as can guarantee the width of cloth to and axial mechanical strength, optional with the high material of electrical strength with dwindle the width of cloth to and axial dimension, the performance of raising coil.Simultaneously, the high-temperature capability that consider material makes whole winding reach the thermal endurance class of design.Layer insulation also can select for use the material of double-sided belt glue that the coil of coiled is sticked together to improve its mechanical strength.When directly contacting with cushion block when the axial end of certain section, the whole power on the coil of acting on be concentrated in the contacted small size of cushion block on.When big or active force is big as distance between two cushion blocks, can suitably thicken cast thickness this moment to guarantee the stability and the mechanical degree of coil.

In addition, can put at coil appointed positions place temperature element (also can the time be placed on two certain intersegmental position in assembling, when the temperature that winding should the place after operation a period of time can be as the temperature of winding, and insulation and draw more convenient).

Embodiment of the present utility model is referring to accompanying drawing.Accompanying drawing is the most basic sectional drawing of embodiment, and among the figure: 1. being inboard support ring, 2. is layer insulation, 3. is that 4. foil conductor is end cast circle, 5. is the adhesive tape of outsourcing, 6. is the section insulation cushion pad.

Compared with prior art, the utility model has fundamentally overcome the shortcoming of existing high pressure foil coil.Has applied range; Need not special casting mold, make simple; Installation and maintenance are convenient; Characteristics such as when obviously saving material and worker.Be applicable to the dry type air insulation, inflation or oil-immersed type transformer, reactor, the high-tension coil of instrument transformer.

Claims (5)

1, a kind of high pressure foil coil that is not cast in together, mainly form by foil conductor, layer insulation, buffer insulation pad and the radial fastener of axle, it is characterized in that the finished product coil of making does not pour into an integrated entity, the radial about side of each section is not poured into a mould, each section separately stacks, promptly alternately placed by each coil segment of foil conductor and layer insulation coiled and buffer insulation pad and form a complete coil, intersegmental lead-in wire couples together by crimping, welding, binding method.

2, coil according to claim 1, the foil that it is characterized in that conducting electricity is aluminium foil or Copper Foil; Layer insulation is film, paper, adhesive tape; Be the buffer insulation pad between two line segments.

3, coil according to claim 1 is characterized in that fastening the cast in the end by heat reactive resin of every section end winding forms.

4, coil according to claim 1 is characterized in that each section inboard propped up by fastening paper circle, resin cartridge etc., and the outside is formed by adhesive tape, packing element colligation.

5, coil according to claim 1 is characterized in that can drawing in the coil tap and adds the heat radiation air flue.