JP2020188093A - Transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transformer which simplifies the fixing structure of the contents of a transformer and simplifies the work of fixing the contents of the transformer to a container.
A transformer has an assembly having an iron core and windings wound around the iron core, and a tank 10 for accommodating the assembly. The transformer includes an upper fastener 30 attached to the tank 10 above the contents of the transformer, and an inner fitting seat 40 provided on the inner wall of the tank 10 which is a connection portion with the upper fastener 30. A fixing groove 32 provided on one of the mounting portion 31 of the upper tightening bracket 30 or the content mounting seat 40 of the tank 10, and a convex portion provided on the other side of the mounting portion 31 of the upper tightening bracket 30 or the content mounting seat 40 of the tank 10. The contents of the transformer are fixed to the tank 10 by fitting the transformers together.
[Selection diagram] Fig. 3

Description

The present invention relates to transformer equipment or transformers.

As a transformer, there is a transformer in which the contents of a transformer having an iron core and windings wound around the iron core are housed in a container. In such a transformer, it is necessary to house and fix the contents of the transformer in the container so that the contents of the transformer do not move in the container.

According to Patent Document 1 (Japanese Unexamined Patent Publication No. 2014-236133), "The pole transformer 1 is composed of a transformer main body 10 and a transformer case 20, and is vertically downward on the lower core fastener 14 of the transformer main body. Is provided with a lower core tightening convex portion 14c, a bottom plate recess 22a having a recess is provided in the bottom plate 22 of the transformer case, and the lower core tightening convex portion is fitted into the bottom plate recess. ”(Summary) reference).

Japanese Unexamined Patent Publication No. 2014-236133

In Patent Document 1 (Japanese Unexamined Patent Publication No. 2014-236133), the means for fixing the transformer body 10 to the transformer case 20 is described as "fixed using two L-shaped upper steady rest fittings 41. One end of the upper steady rest metal fitting 41 is fixed to the upper surface of the upper core fastening metal fitting 13 with a bolt, and the other end is fixed to the seat 21a of the side plate 21 with a bolt. Such a configuration is configured in the transformer case 20. The upper part of the transformer main body 10 is fixed to the inside of the transformer case 20 by providing the transformer main body 10 at two symmetrical positions inside. " Further, it is disclosed that the lower part of the transformer main body 10 is also fixed (steady steady).

However, in the process of assembling the transformer, the lifted transformer main body 10 is transported into the transformer case 20, the bolts of the seat 21a of the side plate 21 are aligned, and the four convex portions at the lower part of the transformer 10 are formed. It is also necessary to align with the positions of the corresponding four bottom plate recesses 22a, and it is not considered that the assembly work becomes difficult.

The present invention simplifies the fixing structure of the transformer contents and makes the transformer contents into a container in the transformer contents having the iron core and the winding wound around the iron core and the transformer having the container for accommodating the transformer contents. The purpose is to simplify the fixing work of.

To give an example of the "transformer" of the present invention for solving the above-mentioned problems, an assembly having an iron core and a winding wound around the iron core, and a transformer having a container for accommodating the assembly are used. It is provided with a fixing bracket with the container attached above the contents of the transformer and a mounting seat provided on the inner wall of the container, which is a connecting portion with the fixing bracket, and mounting the fixing bracket. The contents of the transformer are made into the container by fitting the fixing groove provided on one of the mounting portion or the mounting seat of the container with the convex portion provided on the mounting portion of the fixing bracket or the mounting seat of the container. It is characterized in that it is fixed to.

According to the present invention, in a transformer having an iron core and a winding wound around the iron core, and a transformer having a container for accommodating the contents of the transformer, the fixing structure of the contents of the transformer is simplified, and the contents of the transformer The work of fixing to the container can be simplified.
Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.

FIG. 5 is a schematic view of a transformer to which a top fastener is applied according to the first embodiment. It is a figure which shows the top fastener of the transformer of Example 1. It is an enlarged view of the mounting part of the upper fastener and the vicinity of the content mounting seat of the transformer of the first embodiment. It is a figure which shows the fixing groove of the upper fastener and the contents mounting seat at the time of mounting the contents of a transformer. It is a top view which shows the transformer contents and contents mounting seat at the time of mounting the contents of a transformer. It is a flowchart of the assembly work process of the transformer of Example 1. Example 1 This is a modification of the mounting portion of the upper fastener of the transformer. This is a modified example of the content mounting seat of the transformer of the first embodiment. FIG. 5 is a schematic view of the transformer of the first embodiment when the relationship between the mounting portion of the upper fastener and the content mounting seat is reversed. It is the schematic of the transformer of Example 2. FIG. It is an enlarged view of the mounting portion of the upper fastener and the vicinity of the content mounting seat of the transformer of the second embodiment. It is a schematic diagram which shows an example of the conventional transformer. It is a flowchart of the assembly work process of the conventional transformer.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each figure for demonstrating the embodiment, the same component is given the same name and reference numeral as much as possible, and the repeated description thereof will be omitted.

The prior art of Patent Document 1 described above will be described with reference to FIG. 12, which is rewritten with a reference numeral corresponding to the reference numeral in the present specification. An example of a conventional transformer in which the contents of a transformer having an iron core and a winding are housed in a container is shown. In FIG. 12, the transformer content 14 which is a single-phase transformer is composed of an iron core 12 and a winding 13 wound around the iron core 12.

The container is composed of a tank 10 and a cover 11. As the components for fixing the transformer contents 14 to the tank 10, the upper fastener 20 arranged in the upward direction of the contents, the lower fastener 21 arranged in the downward direction of the contents, and the upper fastener 20 as in the upper fastener 20 It is arranged in a direction and includes a content fixing bracket 22 for fixing the content and the tank.

Further, the upper tightening bracket 20 and the content fixing bracket 22 are fixed by the bracket fixing bolts and nuts 23, and the content fixing bracket 22 and the tank 10 are fixed by the content fixing bolt 24 provided on the content fixing seat 25. The contents of the transformer are fixed to the container, and Patent Document 1 further attaches a nut between the contents fixing seat 25 and the tank 10.

In the conventional transformer shown in FIG. 12, the number of parts for fixing the contents of the transformer to the container is large, which increases the assembly work process. Further, although not shown in FIG. 12, in the prior art, it is necessary to fit the bottom surface of the transformer contents into the four recesses on the bottom surface of the tank, which further increases the assembly work process. Further, since there are many connecting parts such as bolts and nuts, it is a cause of vibration when the transformer is energized, and it is not considered that noise due to vibration is generated.

FIG. 1 shows a schematic view of a transformer to which the upper fastener of the first embodiment of the present invention is applied.
The transformer in the present invention has a container (case) having a tank 10 and a cover 11, and the container contains a transformer content 14 having an iron core 12 and a winding 13 wound around the iron core 12. doing. It is desirable that the tank 10 and the cover 11 are hermetically sealed. The transformer contents 14 may be referred to as an assembly. Further, the tank 10 may be simply referred to as a container, or the tank 10 and the cover 11 may be integrally referred to as a container. Further, the transformer equipment or the transformer in the present specification is an oil-filled transformer having an insulating oil which is a liquid for insulating and cooling the contents of the transformer in a container, and a varnish which is a resin is applied to the contents of the transformer. A dry transformer will be described as a representative, but the present invention is not limited to these, and other transformer equipment or transformers may be used.

In the figure, as an example of the transformer in the present invention, there is one iron core 12 which is a magnetic circuit, and an inner iron shape in which a winding 13 is wound around the iron core is shown. The present invention is also applicable to an outer iron type in which one or more surrounds the winding. Further, the present invention is applicable not only to a single-phase transformer for single-phase AC but also to any transformer such as a V-connection transformer for three-phase AC.

In FIG. 1, as components for fixing the transformer contents 14 to the tank 10, the lower fastener 21 arranged in the downward direction of the contents, the upper fastener 30 arranged in the upward direction of the contents, and the inner wall of the tank 10 It is provided with the provided content mounting seat 40. Here, the upper tightening metal fitting 30 is the fixing metal fitting of the present invention.

2A and 2B show a schematic view of the upper fastener 30, FIG. 2A is a top view, FIG. 2B is a front view, and FIG. 2C is a right side view. Further, FIG. 3 shows the relationship between the mounting portion 31 of the upper fastener 30 and the content mounting seat 40 provided on the inner wall of the tank 10 when mounting, FIG. 3A is a front view, and FIG. 3B is a side surface. It is a figure.

As shown in FIG. 2, the upper tightening metal fitting 30 is formed by bending a metal plate, and a fixing band hole 33 through which a band for fixing the iron core 12 and the upper tightening metal fitting 30 is passed is hung on a flat surface portion. A lifting eyebolt mounting hole 34 for mounting the upper eyebolt is drilled. Both sides of the upper fastener 30 are bent upward to form a mounting portion 31, the mounting portion 31 extends in the horizontal direction (circumferential direction of the tank), and a wide opening is provided at the end surface of the mounting portion 31. A fixing groove 32 having (open end) is formed. The end of the fixing groove 32 on the opposite side of the opening is bent upward. Further, both sides of the upper fastener 30 different from the side on which the mounting portion 31 is formed are bent downward to form a bent portion 35 into which the iron core 12 is fitted.

As shown in FIGS. 1 and 3, content mounting seats 40 are provided on both sides of the cylindrical tank 10 facing the inner surface. The content mounting seat 40 is composed of a columnar convex portion, and has an enlarged portion having a large cross-sectional area at the tip. Then, as shown in FIG. 3, when the upper tightening metal fitting 30 is attached, the convex portion of the content mounting seat 40 is formed so as to fit into the fixing groove 31 formed in the mounting portion 31 of the upper tightening metal fitting 30. .. Then, the fixing groove 31 and the enlarged portion of the content mounting seat 40 are brought into contact with each other to regulate the position, so that the upper fastener 30 is prevented from coming off from the content mounting seat 40.

4 and 5 show a procedure for fixing the contents of the transformer to the container in the transformer to which the upper fastener of this embodiment is applied. FIG. 4 is a diagram showing the positional relationship between the fixing groove of the upper fastener and the content mounting seat when the transformer contents are mounted, and FIG. 5 is a plan view showing the positional relationship between the transformer contents and the content mounting seat. .. Further, FIG. 6 shows a flowchart of the main contents assembling work of the transformer of this embodiment.

The contents of the transformer are stored and fixed in the container as follows.
Attach the upper tightening bracket 30 and the lower tightening bracket 21 to the transformer contents 14, pass the fixing band through the fixing band hole 33 of the upper tightening bracket 30, and wind the fixing band around the upper tightening bracket 30, the iron core 12, and the lower tightening bracket 21. And integrate (S101, S102). Then, the lifting eyebolt 41 is attached to the eyebolt mounting hole 34 of the upper fastener 30 (S103).
Next, the transformer content 14 is lifted (S104), and the transformer content 14 is inserted into the tank 10 (S105). At this time, as shown in FIG. 5A, the transformer content 14 is inserted by adjusting the angle so that the content mounting seat 40 in the tank and the upper fastener 30 do not interfere with each other.
Next, as shown in FIGS. 4A and 5A, the transformer contents 14 are rotated, and the contents mounting seat 40 provided in the tank is inserted into the fixing groove 32 provided in the upper fastener (S106). ), The angle of the transformer contents 14 is returned to the normal mounting angle (S107). At this time, as shown in FIG. 4B, the content mounting seat 40 provided in the tank 10 fits into the groove portion in the upward direction of the end portion of the fixing groove 32 provided in the mounting portion 31 of the top fastener 30. Then, the transformer contents 14 are fixed to the tank 10.

For comparison, FIG. 13 shows a flowchart of the main contents assembly work of the conventional transformer of FIG.
The upper fastener 20 and the lower fastener 21 are attached to the transformer contents 14, and the fixing band is wound around the upper fastener 20, the iron core 12, and the lower fastener 21 to integrate them (S201, S202).
Next, align the fixing positions of the upper tightening metal fitting 20 and the content fixing metal fitting 22 (S203), pass the metal fitting fixing bolt 23 through the fixing holes of the upper tightening metal fitting 20 and the content fixing metal fitting 22 (S204), and use the metal fitting fixing nut. And fix it (S205).
Next, the transformer content 14 is lifted (S206), and the transformer content 14 is inserted into the tank 10 (S207). At this time, the angle of the transformer contents 14 is adjusted and inserted so as not to interfere with the contents mounting seat 25 in the tank.
Next, the angle of the transformer contents 14 is returned to the normal mounting angle (S208), the hole positions of the contents fixing bracket 22 and the contents mounting seat 25 are aligned (S209), and the contents are fixed by the contents fixing bolt 24 (S210).

In the conventional transformer, in order to avoid interference between the content fixing bracket 22 and the content mounting seat 25, the contents of the transformer are shifted from the regular mounting angle and inserted into the case, and after the insertion, the mounting hole of the content fixing bracket 22 and the mounting hole of the content fixing bracket 22 are used. The alignment of the contents mounting seat 25 and the fastening work with the contents fixing bolt 24 were performed, and the alignment and the bolt fastening work became a bottleneck in the process. In this embodiment, as shown in FIGS. 4 and 5, the contents mounting seat 40 is applied to the fixing groove 32 of the upper fastener 30 and the transformer contents are fixed only by returning to the normal mounting angle. Alignment of the fastener 30 and the content mounting seat 40 and bolt fastening work are not required, and the assembly work is simplified. Regarding the simplification of the work, as shown in FIGS. 6 and 13, the conventional assembly work requires 10 steps, whereas in this embodiment, the assembly work is reduced to 7 steps. There is.

FIG. 7 shows a modified example of the fixing groove 32 formed in the mounting portion 31 of the upper fastener in the transformer of the first embodiment. FIG. 7 (a) shows a fixing groove that opens downward in the vertical direction, FIG. 7 (b) shows a fixing groove 32 that opens to the right in the horizontal direction, and FIG. 7 (c) shows the horizontal direction. Is provided with a fixing groove 32 that opens to the left. Further, FIG. 8 shows a modified example of the content mounting seat 40. In FIG. 8, the left side view is a side view of the content mounting seat, the center view is a view from the right side in the axial direction of the content mounting seat, and the right side view of FIGS. 8C and 8D is the view thereof. A modified example is shown. 8 (a) and 8 (b) show a rectangular enlarged portion formed at the tip of a cylindrical convex portion, and FIGS. 8 (c) and 8 (d) show a rectangular enlarged portion or a semicircular enlarged portion formed at the tip of a prismatic convex portion. It is provided with a circular enlarged portion.

As shown in FIGS. 7 and 8, in this embodiment, in accommodating and fixing the contents of the transformer in the container, a rotation operation is performed, and a fixing groove provided in the mounting portion of the upper fastener and a fixing groove provided in the container are provided. Anything that can be fixed without using bolts by using a convex mounting seat may be used.

FIG. 9 shows a plan view of a modified example of the transformer of the first embodiment. The content mounting seat 40 attached to the tank 10 is provided with a content fixing groove 100. Then, a fixing convex portion 110 is provided on the side portion of the upper tightening metal fitting 30, and the fixing convex portion 110 of the upper tightening metal fitting 30 is fitted into the content fixing groove portion 100 to fix the contents of the transformer. As shown in the figure, the relationship between the groove and the convex can be reversed between the top fastener and the tank. The content fixing groove 100 in FIG. 9 is a groove extending downward, but as in the fixing groove 32 shown in FIG. 3, it extends in the horizontal direction (circumferential direction of the tank) and its end is bent downward. It may be used as a horizontal groove.

According to this embodiment, by fixing the contents of the transformer using the fixing groove provided in the mounting part of the upper tightening bracket, fixing bolts are not used, and the contents fixing bracket is also abolished by the lifting eyebolts. Therefore, the number of parts for fixing the contents of the transformer can be reduced, and the fixing structure of the contents of the transformer can be simplified. In addition, the work of fixing the contents of the transformer to the container can be simplified, and the productivity can be improved by reducing the assembly work process. In addition, noise reduction can be realized by reducing the number of vibration sources by reducing the number of component connections. Furthermore, if the mounting portion of the upper fastener is made by bending, it can be expected that the strength of parts will be improved by work hardening.

FIG. 10 shows a schematic view of a transformer according to a second embodiment of the present invention, in which a vibration-proof rubber for absorbing vibration is provided at a connection portion between a container and the contents of the transformer. Further, FIG. 11 shows an enlarged view of the mounting portion of the upper fastener and the vicinity of the content mounting seat, FIG. 11A is a front view, and FIG. 11B is a side view.

In this embodiment, the vibration-absorbing anti-vibration rubber 120 is fitted into the content mounting seat 40 provided on the inner wall of the tank 10. Then, the fixing groove 32 formed in the mounting portion 31 of the upper tightening bracket 40 is fitted into the content mounting seat 40 to which the vibration-absorbing anti-vibration rubber 120 is mounted. Further, a vibration-absorbing anti-vibration rubber 120 is also provided between the content steady rest 121 for fixing the contents and the lower fastener 21 provided on the bottom surface of the tank 10.

According to this embodiment, the magnetostriction propagating from the iron core to the tank is further provided by providing the content mounting seat 40, which is a connection portion between the contents of the transformer and the container, and the anti-vibration rubber 120 for vibration absorption in the content steady rest 121. Vibration is reduced and noise can be reduced.

10 Tank 11 Cover 12 Iron core 13 Winding 14 Transformer contents 20 Top tightening bracket 21 Bottom tightening bracket 22 Contents fixing bracket 23 Bracket fixing bolts and nuts 24 Contents fixing bolt 25 Contents mounting seat 30 Top tightening bracket 31 Top tightening bracket Mounting part 32 Fixing groove of upper tightening bracket 33 Hole for fixing band 34 Mounting hole for lifting eyebolt 35 Folded part 37 Fixing groove opening 40 Contents mounting seat 41 Eyebolt for lifting contents 100 Groove for fixing contents 110 Convex part for fixing 120 Anti-vibration rubber for vibration absorption 121

Claims (12)

A transformer having an iron core and windings wound around the iron core, and a transformer having a container for accommodating the contents of the transformer.
A fixing bracket with the container attached above the contents of the transformer,
A mounting seat provided on the inner wall of the container, which is a connection portion with the fixing bracket, is provided.
The transformer is formed by fitting a fixing groove provided on one of the mounting portions of the fixing bracket or the mounting seat of the container with a convex portion provided on the mounting portion of the fixing bracket or the mounting seat of the container. A transformer characterized in that the contents of the container are fixed to the container. In the transformer according to claim 1,
The fixing groove is a groove in the circumferential direction of the container, and is
A transformer characterized in that the convex portion is fitted into the fixing groove by rotating the contents of the transformer. In the transformer according to claim 2,
The fixing groove is a transformer characterized in that a groove in the vertical direction is provided at an end of the groove in the circumferential direction of the container. In the transformer according to claim 2,
A wide opening is provided at the entrance of the fixing groove.
A transformer characterized in that the convex portion fits from the opening. In the transformer according to claim 1,
The fixing metal fitting is a transformer characterized by being an upper tightening metal fitting that fits with the iron core. In the transformer according to claim 5,
A transformer characterized in that the upper fastener, the iron core, and the lower fastener attached below the iron core are integrated by a fixing band. In the transformer according to claim 5,
A transformer characterized in that the upper fastener is made of a metal plate, and both sides of the metal plate are bent to form the mounting portion. In the transformer according to claim 1,
An enlarged portion having a large cross-sectional area is provided at the tip of the convex portion.
A transformer characterized in that the fixing groove and the enlarged portion come into contact with each other to regulate the position. In the transformer according to claim 1,
A transformer characterized in that a lifting eyebolt is attached to the fixing bracket. In the transformer according to claim 1,
A transformer characterized in that a vibration-proof rubber for vibration absorption is provided between the fixing groove and the convex portion. A transformer having an iron core and windings wound around the iron core, and a transformer having a container for accommodating the contents of the transformer.
The inner wall of the container is provided with a convex portion protruding inward.
The transformer contents are provided with a mounting portion for the transformer contents.
The mounting portion extends in the circumferential direction of the container and is provided with a first groove having an open end on the end surface of the mounting portion, and the width of the groove is larger than the diameter of the convex portion.
A second groove extending in a direction different from the circumferential direction is provided at an end of the first groove opposite to the open end.
A transformer characterized in that the convex portion is fitted into the second groove from the first groove, and the contents of the transformer are fixed to the container. In the transformer according to claim 11,
The convex portion is provided with an enlarged portion having a large cross-sectional area at a tip protruding inward.
A transformer characterized in that the second groove and the enlarged portion come into contact with each other to regulate the position.

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