KR20160052214A

KR20160052214A - Structure of Tie Plate of Transformer

Info

Publication number: KR20160052214A
Application number: KR1020140152205A
Authority: KR
Inventors: 김민규
Original assignee: 엘에스산전 주식회사
Priority date: 2014-11-04
Filing date: 2014-11-04
Publication date: 2016-05-12

Abstract

The present invention relates to a tie plate structure of a transformer, and more specifically, to a tie plate structure of a transformer capable of increasing welding strength by increasing the welding area of the tie plate. According to one embodiment of the present invention, a tie plate structure of an ultrahigh voltage transformer has an iron core between upper and lower frames and combines the upper and lower frames by having the tie plate at both sides of the iron core, wherein the upper frame has a combining groove formed thereon, and a locking plate welded to the tie plate and inserted into the combining groove to be supported by the upper frame, and the locking plate has groove parts formed thereon to increase the welding surface.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a tie plate structure for a transformer,

The present invention relates to a tie plate structure of a transformer, and more particularly, to a tie plate structure of a transformer in which a welding area of a tie plate is increased to improve a welding strength.

Generally, a high voltage transformer for electric power is formed in a power system, and receives a voltage from a power plant and plays an important role in transmitting power to a customer through a boost and a depressurization.

These transformers must be firmly installed and maintained without shaking for stable operation. Moreover, resistance to forces caused by external environments such as recent earthquakes is becoming important.

1 is a perspective view of an ultra-high voltage transformer according to the prior art. As shown, three coils 2 surrounding the iron core 1 are arranged side by side as a three-phase super high voltage transformer. The super high voltage transformer according to the related art includes a bed frame 3 arranged side by side on the floor, a lower frame 4 placed on the top of the bed frame 3 in a direction orthogonal to the bed frame 3, An upper frame 5 placed in the same direction as the lower frame 4 and spacers 6 interposed between the upper and lower frames 4 and 5 and the coils 2.

At this time, since the iron core 1 is weak in strength and can not stand by itself, the tie plate 7 should be installed around the tie plate 7 to support it. In the superhigh-voltage transformer, the tie plate 7 is coupled to the upper frame 5 and supports the weight of the coil 2 and the iron core 1 during lifting of the movable portion and supports the load generated during winding of the coil 2 It also plays a role. In addition, when a short circuit occurs, it is able to withstand the load generated in the vertical direction due to the short circuit mechanical force.

FIG. 2 shows a front view and a side view of a tie plate applied to a superhigh-voltage transformer according to the related art, and FIG. 3 shows a tie plate applied to a superhigh-voltage transformer according to a conventional technique coupled to an upper frame.

A welding plate 8 is welded to the upper portion of the tie plate 7. The welding plate 8 is fitted into the groove 5a formed in a part of the upper frame 5. [ The pair of tie plates 7, to which the welding plates 8 are respectively fitted to the inner side surfaces of the upper frame 5, are held by the crossbars 5b, so that the tie plates 7 are not separated and retain the bonding force.

However, if the welded portion 9 between the tie plate 7 and the weld plate 8 does not satisfy the welding strength standard, breakage occurs in the welded portion 9, which affects the stability of the whole transformer.

Fig. 4 shows a cross-sectional view of the coil 2. Fig. The tie plate 7 is required to be coupled between the coil 2 and the iron core 7, so that its width is limited. As a result, the width of the welding plate 8 is limited. The welding strength is affected by the welding area of the welding plate 8. The welding plate 8 may be limited in size depending on the arrangement of the iron core 7 and the coil 2, There is a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a tie plate structure of a transformer in which a welding area of a tie plate is increased to improve a welding strength.

According to another aspect of the present invention, there is provided a tie plate structure of a superhigh-voltage transformer, wherein an iron core is installed between upper and lower frames, and a tie plate is provided on both side surfaces of the iron core to be coupled to the upper and lower frames, The upper frame is provided with an engaging groove, welded to the tie plate and inserted into the engaging groove to receive the upper frame. The engaging plate is provided with a plurality of grooves for increasing the welding surface .

Here, the latching plate is formed in a 'E' shape.

Further, the width 'd' of the welded portion welded to the tie plate is formed to be equal to or smaller than the thickness 't' of the engaging plate.

The width 'D' of the recessed portion is formed to be wider than twice the width 'd' of the welded portion.

According to the tie plate structure of the transformer according to the embodiment of the present invention, the welding area of the tie plate is increased and the welding strength is improved.

Thus, the support force can be ensured without increasing the size of the tie plate, thereby improving the performance and stability of the transformer.

1 is a perspective view of an ultra-high voltage transformer according to the prior art.
2 is a front view and a side view of a tie plate applied to a superhigh-voltage transformer according to the prior art.
FIG. 3 shows a state in which a tie plate applied to a superhigh-voltage transformer according to the related art is coupled to an upper frame.
Figure 4 is a cross-sectional view of the coil of Figure 1;
5 is an assembled state view of a tie plate of an ultra-high voltage transformer according to an embodiment of the present invention.
Fig. 6 shows a state in which the windings are removed in Fig.
7 is a front view and a side view of a tie plate applied to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to illustrate the present invention in a manner that allows a person skilled in the art to easily carry out the invention. And does not mean that the technical idea and scope of the invention are limited.

5 is a state in which the tie plate of the superhigh-voltage transformer according to the embodiment of the present invention is engaged, and FIG. 6 shows a state in which the windings are removed in FIG. 7 is a front view and a side view of a tie plate applied to an embodiment of the present invention. The tie plate coupling structure of the superhigh-voltage transformer according to each embodiment of the present invention will be described in detail with reference to the drawings.

The tie plate coupling structure of the superhigh-voltage transformer according to an embodiment of the present invention includes an iron core 40 between the upper and lower frames 20 and 30 and a tie plate 50 on both sides of the iron core 40 Wherein the upper frame 20 is formed with a coupling groove 21 and is welded to the tie plate 50 and the coupling groove 21 is formed in the upper frame 20. The upper and lower frames 20, And a plurality of recessed grooves 56 for increasing the welding surface are formed on the retaining plate 55. The retaining plate 55 is formed with a plurality of recessed grooves 56 formed in the upper plate 20, do.

The present embodiment shows an example applied to a three-phase transformer. That is, three cylindrical coils (not shown) are arranged in a row. The coil may be provided as a double coil of a low-voltage coil and a high-voltage coil. The high-voltage coil is made of a conductor having excellent conductivity, and can be vacuum-molded with an epoxy resin or the like having excellent mechanical and electrical performance, so that the short-circuit mechanical force and the insulation performance can be excellent. The low-voltage coil can be wound by using a sheet conductor and a Pre-Preg Insulated Sheet, and after curing the mold, the short-circuit mechanical force and moisture resistance can be improved.

A core 40 is provided inside the coil (not shown). The iron core 40 is provided to be raised in each coil, and the upper and lower portions are connected to each other. As the iron core 40, a directional silicon steel sheet manufactured by a cold rolling method may be used. The iron core 40 can be wrapped with an insulating tape having excellent thermal and mechanical characteristics, and the surface of the iron core 40 can be subjected to a rust-proof coating for protection.

A bed frame 10 is installed on the ground. The bed frame 10 is rigidly fixed to a ground or the like as a base structure.

The lower frame 30 is installed at a center of the bed frame 10 in a direction orthogonal to the bed frame 10. The lower frame 30 may be formed to have a length that accommodates all three-phase coils (not shown). The lower frame 30 may be formed as a section shape steel. For example, the lower frame 30 may be formed of a rectangular steel.

A coil (not shown) is placed in a line on the lower frame 30. [ Each of the coils (not shown) is installed so that an appropriate gap is maintained.

The upper frame 20 is installed in the same direction as the lower frame 30 on the upper part of the coil (not shown). The upper frame 20 may be made of the same material as the lower frame 30. That is, the upper frame 20 may be formed of a rectangular steel.

On both inner side surfaces of the upper frame 20, coupling grooves 21 into which a hanging plate 55 to be described later can be inserted are symmetrically formed. The engaging groove 21 may be formed in a substantially rectangular shape.

Spacers 60 may be interposed between the lower frame 30 and the coil (not shown) and between the upper frame 20 and the coil (not shown). The spacer 60 may be made of wood or the like.

The cross bar 25 is installed on the upper frame 20. [ The cross bars 25 are provided in a direction perpendicular to the upper frame 20 and in a direction parallel to the bed frame 10. [ The crossbar 25 is coupled to both sides of the upper frame 20 to prevent the upper frame 20 from being opened. The size of the crossbar 25 may be smaller than the size of the bed frame 10. That is, the length of the crossbar 25 is shorter than the length of the bed frame 10, and the width of the crossbar 25 may be narrower than the width of the bed frame 10. The interval between the crossbars 25 may be set to be equal to the interval between the bed frames 10.

The tie plate 50 is formed of a straight steel (I-steel). The tie plate 50 is formed to have a length extending from the upper frame 20 to the lower frame 30. The tie plate (50) is provided symmetrically on both sides of the iron core (40). The tie plate 50 is coupled to the upper frame 20 to support the iron core 40 and may be made of steel.

The engaging plate 55 is engaged with the tie plate 50. The fastening plate 55 is welded to the tie plate 50. The latching plate 55 may be formed of a substantially rectangular steel plate.

A plurality of recessed grooves 56 are formed in the engaging plate 55. The recessed portion 56 may be formed on the upper surface of the engaging plate 55.

Here, the width 'd' of the welded portion 57 is formed to be equal to or smaller than the thickness 't' of the engaging plate 55. By doing so, the width of the latching plate 55 can be maximized.

Further, the width 'D' of the recessed portion 56 is formed to be wider than twice the width 'd' of the welded portion 57. Accordingly, the recessed groove portion 56 increases the welding surface by securing a space necessary for welding, so that the coupling force between the engagement plate 55 and the tie plate 50 is improved.

The engaging plate 55 is welded to the tie plate 50 to form a single body. The tie plate 50 supports the iron core 40 in a state in which the engaging plate 55 is engaged with the engaging groove 21 of the upper frame 20. The upper frame 20 is coupled so as not to be opened by the cross bar 25 so that the tie plate 50 is not detached from the upper frame 20 but maintains the engaged state while supporting the iron core 40.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the scope of the present invention. It is obvious that the claims fall within the scope of the claims.

10 bed frame 20 upper frame
21 engaging groove 25 crossbar
30 lower frame 40 iron core
50 Tie plate 55 Retaining plate
56 recessed portion 57 welded portion
60 Spacer

Claims

And a tie plate is provided on both side surfaces of the iron core to be coupled to the upper and lower frames,
The upper frame is provided with a coupling groove,
An engaging plate welded to the tie plate and inserted in the engaging groove to receive the support of the upper frame,
Wherein the fastening plate is provided with a plurality of recessed portions for increasing the welding surface.

The tie plate coupling structure of an ultra-high voltage transformer according to claim 1, wherein the latching plate is formed in a lying 'E' shape.

The structure as claimed in claim 1, wherein a width 'd' of the welded portion welded to the tie plate is smaller than a thickness 't' of the fastening plate.

The tie plate assembly of claim 4, wherein the width 'D' of the recess is greater than twice the width 'd' of the weld.