CN212967324U

CN212967324U - Epoxy pouring assembled dry-type transformer

Info

Publication number: CN212967324U
Application number: CN202021750805.5U
Authority: CN
Inventors: 陈丽斌; 徐京华; 杨胜生; 陆坤靖
Original assignee: Kunshan Libian Electric Co ltd; Kunshan Wusong Electrical Equipment Co ltd; Kunshan Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Current assignee: Kunshan Libian Electric Co ltd; Kunshan Wusong Electrical Equipment Co ltd; Kunshan Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-04-13
Anticipated expiration: 2030-08-20

Abstract

The utility model discloses an epoxy casting assembled dry-type transformer, comprising a transformer body and a base, a first support frame is arranged on the base, the transformer body is located on the first support frame, and the transformer body comprises three The coil includes a winding and four independent iron cores wound around the winding. The front side of the coil is provided with a connecting piece, the connecting piece is connected with a connecting rod, and the connecting rod is connected with a high-voltage terminal, and the high-voltage terminal is connected with a The clips are electrically connected; the clips include an upper cover plate, a lower bottom plate and two side plates. The iron core of the utility model is divided into four independent iron cores, which is convenient for on-site assembly. The weight of each single iron core is significantly reduced, which is convenient for transportation and lifting and installation. The advantages are very obvious when there are restrictions on transportation and lifting. The on-site assembly is simple and convenient, with fast time and high efficiency, and the performance is not affected in any way.

Description

Epoxy pouring assembled dry-type transformer

Technical Field

The utility model relates to an epoxy pouring assembles dry-type transformer belongs to the electricity field.

Background

A Transformer (Transformer) is a device that changes an alternating-current voltage by using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil, and an iron core (magnetic core). The main functions are as follows: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), and the like. According to the application, the method can be divided into: the power transformer and special transformer include electric furnace transformer, rectifier transformer, industrial frequency test transformer, voltage regulator, mining transformer, audio transformer, intermediate frequency transformer, high frequency transformer, impact transformer, instrument transformer, electronic transformer, reactor, mutual inductor, etc.

The method is divided into a dry type transformer and an oil immersed type transformer according to a cooling mode:

the dry-type transformer is a small-capacity transformer which is naturally cooled or additionally cooled by a fan by means of air convection and is mainly used for electricity utilization, local illumination, electronic circuits and the like of high-rise buildings and high-speed toll stations.

Oil-immersed transformers rely on oil as a cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling, forced oil circulation, and the like.

In the electric power supply and distribution system in China, three-phase three-wire system or three-phase four-wire system is generally adopted for power supply and distribution, so that a three-phase transformer is widely used. The power supply and distribution system is the most critical device in the power supply and distribution system, and the function of the power supply and distribution system is to increase or decrease the power voltage in the power supply and distribution system so as to facilitate reasonable transmission, distribution and use of power. The three-phase transformer mainly comprises an iron core, a winding, an oil tank, a cooling device, a protection device and the like. The three-phase power transformer iron core adopts a core type structure, and the iron core of the core type structure adopts an overlapped type overlapping process. The windings are circuit parts of a three-phase power transformer. The oil tank consists of a tank body, a tank cover, a heat dissipation device and an oil drain valve, and is mainly used for connecting the transformer into a whole and dissipating heat. The inside is the windings, core and transformer oil. The transformer oil has the functions of circulating cooling, heat dissipation and insulation. The winding is at a certain distance from the box body (box wall and box bottom) and is isolated by oil in the oil tank as an insulating layer.

The three-phase transformer is mostly Y-structure integrated iron core structure transformer reported in literature, the single iron core is heavy, and the lifting, the installation and the transportation are inconvenient, thereby limiting the use occasions.

In addition, some conventional clamping pieces in the market are of a channel steel type, high-voltage windings and low-voltage windings are separated, and a pulling plate structure is adopted, so that the clamping pieces are inconvenient to install, long in whole assembly labor time, large in size and not attractive enough.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem, a dry-type transformer is assembled in epoxy pouring is provided, and it is through institutional advancement, and is easy to assemble, has reduced the trouble in the transportation simultaneously.

To achieve the purpose, the utility model adopts the following technical proposal:

an epoxy cast assembled dry-type transformer comprises a transformer body and a base, wherein a first support frame is arranged on the base, the transformer body is positioned on the first support frame and comprises three coils, each coil comprises a winding and four independent iron cores wound with the winding, a connecting sheet is arranged on the front side of each coil and connected with a connecting rod, the connecting rod is connected with a high-voltage terminal, and the high-voltage terminal is electrically connected with a clamping piece positioned above the coil; the clamping piece comprises an upper cover plate, a lower bottom plate and two side plates.

Further, the lower extreme of base is equipped with the connecting block, and the connecting block lower extreme is connected with the supporting legs.

Further, the coil is of a rectangular structure with round corners, and the radius of the round corners is 1/10-1/4 of the diagonal line of the rectangle.

Furthermore, the clamping piece is of a high-low pressure integrated embedded structure and is made of steel through bending.

Furthermore, a second support frame is arranged above the coil, and the clamping piece is positioned on the second support frame.

Furthermore, a lifting hole is integrally formed in the upper cover plate and used for lifting.

Furthermore, a fan is arranged between the base and the first support frame, and a heat dissipation device is connected to one side of the fan.

Furthermore, the upper end of the transformer body is provided with a high-voltage terminal, a low-voltage terminal and a high-low voltage switch.

The utility model has the advantages that:

1. the conventional iron core is a three-phase integrated iron core, and the weight of the single iron core is large. This scheme iron core divide into four independent iron cores, makes things convenient for the scene to assemble. The weight of each single iron core is obviously reduced, the transportation and hoisting installation are convenient, and the advantages are very obvious in the situation with limitation on the transportation and hoisting. The on-site assembly is simple and convenient, the time is fast, the efficiency is high, and the performance is not influenced.

2. The conventional clamping piece is in a channel steel type, and the high-voltage clamping piece and the low-voltage clamping piece are separated and are provided with a pulling plate structure. The scheme is a steel plate bending type, laser processing is performed, the precision is high, the appearance is attractive, and the strength is high. The clamping piece is embedded in a high-low voltage integrated mode, a pulling plate is omitted, and the clamping piece is changed into a two-side plate. The clamping structure consists of an upper cover plate, a lower bottom plate and two side plates, the single body is light in transportation weight, and the on-site assembly is convenient and quick.

3. Conventional coils are circular. The coil is the rectangle with round corners, the winding influence is small, the filling coefficient of the transformer is high, the space is effectively utilized, and the overall dimension of the transformer body is effectively reduced.

Drawings

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

FIG. 2 is a schematic view of the clip structure of the present invention;

fig. 3 is a top view of the transformer structure of the present invention.

In the figure: 1-a transformer body; 2-a base; 3-a first support frame; 4-a coil; 41-iron core; 5-connecting the sheet; 6-connecting rod; 7-a high voltage terminal; 8-a clamp; 81-upper cover plate; 82-a lower base plate; 83-side plate; 9-connecting blocks; 10-a ground pin; 11-a second support; 12-hanging holes; 13-a fan; 14-low voltage terminal.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in FIGS. 1-3,

the epoxy cast assembled dry-type transformer in the embodiment comprises a transformer body 1 and a base 2, wherein a first support frame 3 is arranged on the base 2, the transformer body 1 is positioned on the first support frame 3, the transformer body comprises three coils 4, the coils 4 comprise windings and four independent iron cores wound with the windings, connecting sheets 5 are arranged on the front surfaces of the coils, the connecting sheets 5 are connected with connecting rods 6, the connecting rods 6 are electrically connected with high-voltage terminals 7, and the high-voltage terminals 7 are electrically connected with clamping pieces 8 positioned above the coils 4; the clip member 8 includes an upper cover plate 81, a lower base plate 82, and two side plates 83.

In this embodiment, the lower extreme of base 2 is equipped with connecting block 9, and connecting block 9 lower extreme is connected with ground connection foot 10.

In the embodiment, the coil 4 is in a rectangular structure with round corners, and the radius of the round corners is 1/10-1/4 of the diagonal line of the rectangle.

In this embodiment, the clip 8 is an integral embedded structure and is made of bent steel.

In this embodiment, a second support frame is disposed above the coil 4, and the clip is disposed on the second support frame.

In this embodiment, the clip is integrally provided with a hanging hole 12 for hanging.

In this embodiment, a fan 13 is disposed between the base 2 and the first support frame 3, and a heat dissipation device is connected to one side of the fan 13.

Further, the upper end of the transformer body 1 is provided with a high-voltage terminal 7, a low-voltage terminal 14 and a high-low voltage switch.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. An epoxy cast assembled dry-type transformer is characterized by comprising a transformer body and a base, wherein a first support frame is arranged on the base, the transformer body is positioned on the first support frame and comprises three coils, each coil comprises a winding and four independent iron cores wound with the winding, a connecting sheet is arranged on the front side of each coil and connected with a connecting rod, the connecting rod is connected with a high-voltage terminal, and the high-voltage terminal is electrically connected with a clamping piece positioned above the coil; the clamping piece comprises an upper cover plate, a lower bottom plate and two side plates.

2. The epoxy cast assembled dry-type transformer of claim 1, wherein the lower end of the base is provided with a connecting block, and the lower end of the connecting block is connected with a supporting leg.

3. The epoxy cast assembled dry-type transformer of claim 1, wherein the coil is a rectangular structure with rounded corners, and the radius of the rounded corners is between 1/10 and 1/4 of the diagonal of the rectangle.

4. The epoxy cast assembled dry-type transformer of claim 1, wherein the clip is a high-low voltage integrated embedded structure made of bent steel.

5. The epoxy cast assembled dry transformer of claim 1, wherein a second support frame is disposed above the coil, and the clip is disposed on the second support frame.

6. The epoxy cast assembled dry-type transformer of claim 1, wherein the upper cover plate is integrally provided with a hanging hole for hanging.

7. The epoxy cast assembled dry transformer of claim 1, wherein a fan is disposed between the base and the first support frame.

8. The epoxy cast assembled dry-type transformer of claim 1, wherein the transformer body is provided with a high voltage terminal, a low voltage terminal and a high and low voltage switch at the upper end.