CN217114085U - Dry-type transformer coil with shielding layer - Google Patents

Abstract

The utility model provides a take dry-type transformer coil of shielding layer relates to transformer technical field. This dry-type transformer coil of taking shielding layer includes the coil body, coil body internally mounted has the wire, the outer internal insulation of wire fixedly connected with coil, the outer internal insulation outside fixedly connected with semiconductor shielding layer of coil, the semiconductor shielding layer outside fixedly connected with metal shielding layer, the outer external insulation of metal shielding layer outside fixedly connected with coil. This take dry-type transformer coil of shielding layer forms resin layer, wire, resin layer, semiconductor shielding layer, metal shielding layer, resin layer structure from inside to outside, and the wire that is electrified through improving back passes through resin layer, semiconductor shielding layer, metal shielding layer and improves electric field distribution, and metal shielding layer ground connection is handled, and the outermost resin layer surface of coil body does not have the response electrified, solves coil body surface electrification problem, simple structure, convenient operation.

Description

Dry-type transformer coil with shielding layer

Technical Field

The utility model relates to a dry-type transformer coil specifically is a dry-type transformer coil of area shielding layer, belongs to transformer technical field.

Background

The transformer coil is a coil, and the transformer needs a coil to operate. According to phase fraction: 1. single-phase transformer: the method is used for single-phase loads and three-phase transformer banks. 2. Three-phase transformer: the voltage raising and reducing device is used for raising and reducing voltage of a three-phase system. According to the volume: the coil of the small transformer is generally made of round copper wire with insulation, the coil of the large transformer is made of flat copper wire with insulation, and the coil is generally divided into a layer type and a cake type. The coil is formed by continuously winding the turns of the coil in layers in the axial direction, and is called a layer coil. Each layer is cylindrical, so that the coil has better mechanical strength, is not easy to deform and is convenient to wind. The coil composed of two layers is called double-layer cylinder type; the multilayer cylinder is composed of multiple layers.

At present, in a known resin cast dry type transformer coil structure, a coil wire is arranged in the middle, resin layers of 2.5mm-3.5mm are arranged inside and outside the coil, when the transformer operates, the voltage of the coil wire is increased, the resin layers of 2.5mm-3.5mm are not enough to isolate the voltage, namely, the outer surface of the resin layer of the coil still has induction voltage, and if a field cable is too close to or attached to the outer surface of the coil, the local field intensity is too large, and the discharge breakdown accident is easy to occur.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model aims at providing a take dry-type transformer coil of shielding layer in order to solve above-mentioned problem, with the well-known resin pouring dry-type transformer coil structure among the solution prior art, the centre is the coil wire, all there is the 2.5mm-3.5mm resin layer inside and outside the coil, and the wire voltage rose when the transformer operation coil, 2.5mm-3.5 mm's resin layer is not enough to completely cut off this voltage, coil resin layer surface still has induced voltage promptly, if the field cable is too near or laminating apart from the coil surface, can lead to local field intensity too big, easily take place the problem of the breakdown accident of discharging.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a take dry-type transformer coil of shielding layer, includes the coil body, coil body internally mounted has the wire, the outer internal insulation of wire fixedly connected with coil, the outer internal insulation outside fixedly connected with semiconductor shield of coil, the outer metal shielding layer of fixedly connected with of semiconductor shield outside, the outer external insulation of metal shielding layer outside fixedly connected with coil, the inside radiator unit that is provided with of the outer internal insulation of coil.

Preferably, radiator unit includes a plurality of radiating fin, and is a plurality of the equal fixedly connected with montant in radiating fin bottom, it is a plurality of the equal fixedly connected with shell fragment in montant front side, it is a plurality of the equal joint in shell fragment outside has the backup pad, through being provided with montant and shell fragment, and then can fix radiating fin fast to dispel the heat to the coil body, prevent that the too high damage that causes the coil body of temperature when using of coil body, the heat loss is too big, reduces the life of coil body.

Preferably, a plurality of bar grooves have been seted up to the outer internal insulation of coil inside, the backup pad sets up in the bar inslot portion, backup pad fixed connection is in the outer internal insulation inner wall of coil, through being provided with the backup pad to this can be convenient for fix and support radiating fin.

Preferably, a plurality of clamping grooves are formed in the tops of the supporting plates, the elastic pieces are clamped with the supporting plates through the clamping grooves, and the clamping grooves are formed, so that the elastic pieces can be clamped into the clamping grooves, and the radiating fins can be fixed.

Preferably, the top of the lead is fixedly connected with a coil end insulator, the other side of the lead is fixedly connected with a coil inner insulator, and the lead can be protected by arranging the coil end insulator.

Preferably, the outer insulation of coil and the inner insulation of coil comprise three-layer 1.0mm glass silk net cloth, the outer insulation of coil comprises two-layer 1.0mm glass silk net cloth, 1.0mm glass silk net cloth is inside to be filled with the resin, passes through resin layer, semiconductor shield, the electric field distribution is improved on metal shield through the electrified wire after improving, and metal shield ground connection handles, and the outermost resin layer surface of coil body does not have the induction electrification like this to solve coil body surface electrification problem, simple structure, convenient operation.

Preferably, the thickness of the metal shielding layer is set to 0.3 mm.

The utility model provides a take dry-type transformer coil of shielding layer, its beneficial effect who possesses as follows:

1. this take dry-type transformer coil of shielding layer, twine 3 layers 1.0mm glass silk net cloth at last again, the back is filled in the pouring of rethread resin, form the outer external insulation of coil, the position of all winding glass silk net cloths promptly coil body inside can fill the resin, form the resin layer from inside to outside, the wire, the resin layer, the semiconductor shield, the metal shielding layer, the resin layer structure, through improving electrified wire after passing through the resin layer, the semiconductor shield, the electric field distribution is improved on the metal shielding layer, metal shielding layer ground treatment, the outermost resin layer surface of coil body does not have the response electrified like this, thereby solve coil body surface electrification problem, moreover, the steam generator is simple in structure, and convenient operation.

2. This take dry-type transformer coil of shielding layer, when carrying out the coiling to the coil body, downwards, because the inside fixedly connected with backup pad of outer internal insulation of coil, radiating fin downstream can be pressed to this moment, because montant fixed connection is in the radiating fin bottom, and then radiating fin downstream drives montant downstream, montant downstream drives the shell fragment downstream, and then make the shell fragment joint inside the backup pad, can carry out quick fixed to radiating fin this moment, through being provided with radiating fin, with this can cool down coil body inside, prevent that the coil body from too high damage that causes the coil body when using, the heat loss is too big, reduce the life of coil body.

Drawings

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

FIG. 2 is a schematic view of the outer layer and inner insulation structure of the coil of the present invention;

fig. 3 is a schematic structural view of the semiconductor shielding layer of the present invention.

In the figure: 1. a coil body; 2. a wire; 3. the outer layer of the coil is insulated; 4. a semiconductor shielding layer; 5. a metal shielding layer; 6. the outer layer of the coil is insulated; 7. insulating the coil; 8. insulating a coil end; 9. a heat dissipating fin; 10. a vertical rod; 11. a spring plate; 12. a support plate; 13. a strip-shaped groove.

Detailed Description

An embodiment of the utility model provides a take dry-type transformer coil of shielding layer.

Referring to fig. 1, 2 and 3, the coil comprises a coil body 1, a lead 2 is installed inside the coil body 1, the lead 2 is fixedly connected with a coil outer layer inner insulation 3, a semiconductor shielding layer 4 is fixedly connected to the outer side of the coil outer layer inner insulation 3, a metal shielding layer 5 is fixedly connected to the outer side of the semiconductor shielding layer 4, a coil outer layer outer insulation 6 is fixedly connected to the outer side of the metal shielding layer 5, a heat dissipation assembly is arranged inside the coil outer layer inner insulation 3, a coil end insulation 8 is fixedly connected to the top of the lead 2, a coil inner insulation 7 is fixedly connected to the other side of the lead 2, the lead 2 can be protected by arranging the coil end insulation 8, the coil outer layer outer insulation 6 and the coil inner insulation 7 are composed of three layers of 1.0mm glass fiber mesh cloth, the coil outer layer inner insulation 3 is composed of two layers of 1.0mm glass fiber mesh cloth, the 1.0mm glass fiber mesh cloth is filled with resin, through improving electrified wire 2 of back and improving electric field distribution through resin layer, semiconductor shield 4, metal shielding layer 5, 5 ground connection processing on metal shielding layer, the outermost resin layer surface of coil body 1 does not have the response electrified like this to solve the electrified problem in 1 surface of coil body, simple structure, convenient operation, metal shielding layer 5's thickness sets up to 0.3 mm.

Specifically, the method comprises the following steps: when the coil body 1 is wound, firstly 3 layers of 1.0mm glass fiber gridding cloth are wound on a mould, then the coil inner insulation 7 is formed after resin pouring filling, then the wire 2 is wound according to the structure, 2 layers of 1.0mm glass fiber gridding cloth are wound after the winding is finished, the coil outer layer inner insulation 3 is formed after the resin pouring filling, then 1 layer of 0.3mm copper foil metal shielding layer 5 is added to the 5mm semiconductor shielding layer 4, the metal shielding layer 5 is led out, finally 3 layers of 1.0mm glass fiber gridding cloth are wound, the coil outer layer outer insulation 6 is formed after the resin pouring filling, all the positions of the wound glass fiber gridding cloth, namely the inside of the coil body 1, are filled with resin, the resin layer, the wire 2, the resin layer, the semiconductor shielding layer 4, the metal shielding layer 5 and the resin layer structure are formed from inside to outside, and the improved electrified wire 2 passes through the resin layer, The electric field distribution is improved on the semiconductor shielding layer 4 and the metal shielding layer 5, the metal shielding layer 5 is grounded, and the outermost resin layer surface of the coil body 1 is not electrified by induction, so that the problem of electrification on the surface of the coil body 1 is solved, and the electric-field-type coil is simple in structure and convenient to operate.

Referring to fig. 1 and 3 again, the heat dissipation assembly includes a plurality of heat dissipation fins 9, a vertical rod 10 is fixedly connected to the bottom of each heat dissipation fin 9, an elastic piece 11 is fixedly connected to the front side of each vertical rod 10, a support plate 12 is clamped to the outer side of each elastic piece 11, the heat dissipation fins 9 can be rapidly fixed by the arrangement of the vertical rods 10 and the elastic pieces 11, so as to dissipate heat of the coil body 1, prevent the coil body 1 from being damaged due to overhigh temperature during use of the coil body 1, reduce the service life of the coil body 1, a plurality of strip-shaped grooves 13 are formed in the coil outer layer inner insulation 3, the support plates 12 are arranged in the strip-shaped grooves 13, the support plates 12 are fixedly connected to the inner wall of the coil outer layer inner insulation 3, and are provided with support plates 12, so as to facilitate fixing and supporting of the heat dissipation fins 9, and clamp grooves are formed at the tops of the plurality of the support plates 12, the elastic sheet 11 and the support plate 12 are clamped through a clamping groove, and the elastic sheet 11 can be clamped into the clamping groove through the clamping groove, so that the radiating fin 9 can be fixed.

Specifically, the method comprises the following steps: through insulating 3 inside bar grooves 13 of having seted up in the coil outer layer, when carrying out the coiling to coil body 1, downwards, because the inside fixedly connected with backup pad 12 of insulating 3 in the coil outer layer, radiating fin 9 downstream can be pressed down this moment, because montant 10 fixed connection is in radiating fin 9 bottom, and then radiating fin 9 downstream drives montant 10 downstream, montant 10 downstream drives shell fragment 11 downstream, and then make shell fragment 11 joint inside backup pad 12, can carry out quick fixed to radiating fin 9 this moment, through being provided with radiating fin 9, with this can cool down coil body 1 is inside, prevent that coil body 1 from too high when using causing the damage of coil body 1, the heat loss is too big, reduce coil body 1's life.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. The utility model provides a take dry-type transformer coil of shielding layer, includes coil body (1), its characterized in that: coil body (1) internally mounted has wire (2), wire (2) fixedly connected with coil outer insulation (3), coil outer insulation (3) outside fixedly connected with semiconductor shielding layer (4), semiconductor shielding layer (4) outside fixedly connected with metallic shield (5), metallic shield (5) outside fixedly connected with coil outer insulation (6), coil outer insulation (3) inside is provided with radiator unit.

2. A dry-type transformer coil with a shielding layer as set forth in claim 1, wherein: the radiating assembly comprises a plurality of radiating fins (9) and is multiple in the bottom of each radiating fin (9) is fixedly connected with a vertical rod (10) and multiple in the front side of each vertical rod (10) is fixedly connected with an elastic sheet (11) and multiple in the outer side of each elastic sheet (11) is connected with a supporting plate (12) in a clamping mode.

3. A dry-type transformer coil with a shielding layer as set forth in claim 2, wherein: a plurality of bar grooves (13) have been seted up to coil outer internal insulation (3) inside, backup pad (12) set up inside bar groove (13), backup pad (12) fixed connection is in coil outer internal insulation (3) inner wall.

4. A dry-type transformer coil with a shielding layer as set forth in claim 3, wherein: the top of the supporting plates (12) is provided with a clamping groove, and the elastic pieces (11) are clamped with the supporting plates (12) through the clamping grooves.

5. A dry-type transformer coil with a shielding layer as set forth in claim 1, wherein: the coil end insulation (8) is fixedly connected to the top of the lead (2), and the coil inner insulation (7) is fixedly connected to the other side of the lead (2).

6. A dry-type transformer coil with a shielding layer as set forth in claim 1, wherein: the coil outer layer external insulation (6) and the coil internal insulation (7) are formed by three layers of 1.0mm glass fiber mesh cloth, the coil outer layer internal insulation (3) is formed by two layers of 1.0mm glass fiber mesh cloth, and resin is filled in the 1.0mm glass fiber mesh cloth.

7. A dry-type transformer coil with a shielding layer as set forth in claim 1, wherein: the thickness of the metal shielding layer (5) is set to be 0.3 mm.

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