CN215600215U - Transformer insulation framework - Google Patents

Abstract

The utility model belongs to the technical field of transformers, and particularly relates to an insulating framework of a transformer. The device comprises a framework main body, wherein the framework main body comprises a barrel body I and a barrel body II which are parallel to each other and connected into a whole, and two ends of the barrel body I and the barrel body II are respectively provided with a baffle; barrel I and barrel II are connected through two parallel and rib plate that the interval set up, and three wire winding groove is separated into at the surface of barrel I and barrel II to two rib plates for the coiling winding. The utility model has the advantages of accurate positioning of the iron core, uniform distance between the primary and secondary iron cores and small local discharge, thereby ensuring the safe operation of the product.

Description

Transformer insulation framework

Technical Field

The utility model belongs to the technical field of transformers, and particularly relates to an insulating framework of a transformer.

Background

The mode of winding insulating paper between primary and secondary coils is generally adopted for manufacturing the insulating framework of the transformer at present, along with the continuous development of process equipment industry, the manufacturing process of the insulating framework is continuously and gradually improved, and compared with the mature insulating framework, the insulating framework adopts insulating paper and still has imperfect parts, namely, the insulating paper has low insulating strength and is easy to be connected in series, and in addition, two single resin cylinders are adopted as the insulating framework, so that the insulating framework also has the defects of uneven insulating distance, easy breakdown and the like. Therefore, an insulating framework of a transformer, which has accurate iron core positioning, uniform insulating distance between the primary coil and the secondary coil and small partial discharge, is urgently needed.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, an object of the present invention is to provide an insulation framework for a transformer, so as to solve the problems of low insulation strength, easy string position, uneven insulation distance, easy breakdown, etc. of the existing insulation framework.

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

the utility model provides an insulating skeleton of transformer, includes the skeleton main part, the skeleton main part is including being parallel to each other and connecting barrel I and barrel II as an organic whole, and the outside of barrel I and barrel II all is equipped with three wire winding groove along the axial for the coiling winding.

Two ends of the cylinder body I and the cylinder body II are respectively provided with a baffle;

the cylinder body I and the cylinder body II are connected through two rib plates which are parallel to each other and arranged at intervals, and the outer surfaces of the cylinder body I and the cylinder body II are divided into three winding grooves by the two rib plates.

The rib plates are of an oval structure.

The cylinder I and the cylinder II are of cylindrical structures and have equal diameters, and the cavity of the cylinder is used for sleeving the iron core.

The cavity of the cylinder body I and the cavity of the cylinder body II are both of structures with thin middle parts and thick two ends.

The rib plates, the baffle plates, the cylinder body I and the cylinder body II are of an integrated structure formed by pouring epoxy resin.

And a semi-conductive paint layer is sprayed on the outer surface of the framework main body.

The utility model has the following advantages and beneficial effects:

1. the utility model has the advantages of accurate positioning of the iron core, uniform distance between the primary and secondary iron cores and small local discharge: the insulating resin cylinder divides the primary coil and the secondary coil, so that the primary coil and the secondary coil are ensured to be uniformly grounded and insulated for the secondary coil and the iron core, and meanwhile, after the surface of the resin cylinder is subjected to sand blasting and then semi-conductive paint spraying and drying treatment, the high-low voltage shielding effect is good, the local discharge capacity of a product is small, and therefore the product can be ensured to be safely operated.

2. The utility model has simple and convenient manufacture and high production efficiency: the epoxy resin mixture is gelated and cured into the double resin cylinders through a mould by a vacuum pouring process, and the surface of the double resin cylinders is subjected to sand blasting, semi-conductive paint spraying and drying treatment to prepare the insulating framework.

Drawings

Fig. 1 is a schematic structural diagram of an insulation frame of a transformer according to the present invention.

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a top view of fig. 1.

In the figure: the semi-conductive paint layer 1 is a semi-conductive paint layer, the cavity 2 is a cavity, the framework main body 3 is a rib plate, the baffle plate 5 is a baffle plate, the barrel body I6 is a barrel body I, and the barrel body II 7 is a barrel body II.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-3, the transformer insulation framework provided by the utility model comprises a framework main body 3, wherein the framework main body 3 comprises a cylinder body i 6 and a cylinder body ii 7 which are parallel to each other and connected into a whole, and three winding grooves are formed in the outer sides of the cylinder body i 6 and the cylinder body ii 7 along the axial direction and used for winding windings.

In the embodiment of the utility model, two ends of the cylinder I6 and the cylinder II 7 are respectively provided with a baffle 5; barrel I6 and barrel II 7 are connected through two parallel and rib plates 4 that the interval set up, and three wire winding groove is separated into at the surface of barrel I6 and barrel II 7 to two rib plates 4. The winding slots in the middle are used for winding the primary winding, and the winding slots on the two sides are respectively used for winding the two groups of secondary windings.

Further, as shown in fig. 3, the rib plate 4 has an oval structure, and is compact in structure and attractive in appearance.

In the embodiment of the utility model, as shown in fig. 1-2, the cylinder i 6 and the cylinder ii 7 are cylindrical structures and have equal diameters, and the cavity 2 of the cylinder is used for sleeving the iron core.

Furthermore, the cavities 2 of the cylinder I6 and the cylinder II 7 are both of structures with thin middle parts and thick two ends, and the middle thin cavity and the thick cavities at the two ends are in inclined plane transition, so that convenience is brought to iron core assembly and accurate positioning of the iron core.

In the embodiment of the utility model, the rib plates 4, the baffle plates 5, the cylinder I6 and the cylinder II 7 are of an integrated structure formed by pouring epoxy resin, so that the framework main body 3 is formed, the manufacturing is simple and convenient, and the production efficiency is high.

Further, the outer surface of the framework main body 3 is uniformly sprayed with the semi-conductive paint layer 1, which is beneficial to shielding high and low voltage electric fields.

The utility model relates to an insulating framework, which is a manufacturing process of a product body coil. Firstly, carrying out gel curing on an epoxy resin mixture through a mould by adopting a vacuum pouring process to prepare a double-resin cylinder; and then the surface is subjected to sand blasting and semi-conductive paint spraying and drying treatment to complete the manufacture of the insulating framework.

The insulating framework is a novel process scheme designed according to the production principle of the transformer and related standards, electrical insulation is fully considered, a specially-made insulating framework is utilized during coil manufacturing, the accurate positioning of an iron core is further achieved, the primary and secondary insulation distances of the coil are uniform, and meanwhile, the local discharge amount of a product is small, so that the product can be ensured to run safely, and beneficial guarantee is provided for batch manufacturing and quality control of the transformer.

The utility model provides an insulating framework of a transformer, which has the following specific implementation modes:

firstly, an epoxy resin 3 mixture is gel-cured through a vacuum pouring process through a die to form a double-resin cylinder, namely the double-resin cylinder comprises a cylinder body I6 and a cylinder body II 7, the double-resin cylinder is divided into three grooves by two oval rib plates 4 in the middle, the double-resin cylinder is of an integrated structure with baffle plates 5 which are circular at two ends, and a cavity in the middle of the double-resin cylinder is of a concentric cylinder structure which is thin in the middle, thick at two ends and in inclined transition, so that convenience is brought to iron core assembly and iron core accurate positioning are facilitated; and then spraying the semi-conductive paint layers 1 in the three groove virtual line areas on the surfaces of the double resin cylinders after sand blasting, and drying to finish the manufacture of the double resin cylinders, wherein the semi-conductive paint layers 1 are sprayed in the three groove virtual line areas, so that the shielding of high and low voltage electric fields is facilitated.

The insulating framework is made before winding, then a primary winding is wound in a groove in the middle, secondary windings are wound in grooves on two sides, two oval rib plates 4 are used for insulating the primary winding and the secondary windings to ensure enough insulation distance between the primary winding and the secondary windings, baffle plates 5 at two ends enable the primary winding and the secondary windings to be wound in the grooves to ensure enough insulation to the ground, and the magnetic core of the iron core penetrates through a double-cavity in the middle of the resin cylinder to position the magnetic core.

The transformer insulation framework provided by the utility model overcomes the disadvantages of easy string position, uneven insulation distance between two resin cylinders, inaccurate iron core positioning and the like of the traditional insulation paper used as main insulation, ensures that the insulation distance between a primary coil and a ground of a transformer is even, and ensures that the local discharge capacity of a product is small, thereby ensuring that the product can run safely.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims (7)

1. The utility model provides an insulating skeleton of transformer, its characterized in that, includes skeleton main part (3), skeleton main part (3) are including being parallel to each other and connecting barrel I (6) and barrel II (7) as an organic whole, and the outside of barrel I (6) and barrel II (7) all is equipped with three wire winding groove along the axial for the coiling winding.

2. The transformer insulation framework according to claim 1, wherein two ends of the cylinder I (6) and the cylinder II (7) are provided with baffles (5);

the cylinder I (6) and the cylinder II (7) are connected through two rib plates (4) which are parallel to each other and arranged at intervals, and the outer surfaces of the cylinder I (6) and the cylinder II (7) are divided into three winding grooves by the two rib plates (4).

3. The transformer insulation framework according to claim 2, characterized in that the rib (4) has an oval structure.

4. The transformer insulation framework of claim 2, wherein the cylinder I (6) and the cylinder II (7) are cylindrical structures with equal diameters, and the cylindrical cavity (2) is used for sleeving the iron core.

5. The transformer insulation framework according to claim 4, wherein the hollow cavities (2) of the cylinder I (6) and the cylinder II (7) are both of a structure with a thin middle part and thick two ends.

6. The transformer insulation framework according to any one of claims 2-5, wherein the rib plates (4), the baffle plates (5), the cylinder body I (6) and the cylinder body II (7) are of an integrated structure formed by pouring epoxy resin.

7. Transformer insulation skeleton according to claim 6, characterized in that, the outer surface of the skeleton body (3) is sprayed with a semi-conductive paint layer (1).

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