JP2022096704A - Transformer - Google Patents

Abstract

To replace with one general-purpose replacement outer box while suppressing an increase in the number of components in outer box replacement repair for a plurality of transformers with the same capacity but different specifications of a transformer body and the outer box.SOLUTION: A transformer includes a transformer body having an iron core and a winding wound around the iron core, and an outer box that houses the transformer body, and further includes an upper fixing bracket with the outer box attached above the transformer body, a mounting seat which is a connection part with the upper fixing bracket provided on the inner wall of the outer box, a lower fixing bracket with the outer box attached to the bottom of the transformer body, and a vibration which is a connection part with the lower fixing bracket provided on the inner bottom of the outer box, and the upper fixing bracket has a bolt hole provided in the mounting seat and a long hole-shaped fixing groove in which the bolt fastening position can be adjusted, and the lower fixing bracket has a multi-stage vibration fixing groove that can adjust the position where it fits with the vibration provided on the inner bottom of the outer box.SELECTED DRAWING: Figure 8

Description

The present invention relates to transformer equipment or transformers.

Distribution transformers such as pole transformers that supply power by changing the voltage with distribution lines, or power transformers, which are relatively small transformers for receiving power installed in individual factories, are mainly iron cores. It is composed of a transformer main body, which is an assembly of windings wound around an iron core, and a container for accommodating the transformer main body, that is, an outer box.

Conventionally, the transformer main body has been fixed by a fixing device having a specified dimensional structure installed inside the outer box. These fixing devices are slightly different in the mounting position of the iron core and winding inside the outer box depending on the manufacturer, or even if the same manufacturer, the capacity of the transformer and the manufacturing age are different. Due to the inconsistency, repairs to replace the outer box were often time-consuming or difficult.

Patent Document 1 (Japanese Unexamined Patent Publication No. 2006-196759) states that "a power transformer provided with an adjustable fixing mechanism 2 for fixing a core P portion composed of internal parts such as an iron core and a coil winding of a power transformer". In the general-purpose replacement outer box 1 of the above, the adjustable fixing mechanism 2 is provided with a pair of holding pieces 13 slidable in the lateral direction, and has a steady rest pedestal 3 on which the core portion P is placed and fixed, and a core. The upper part of the portion P is formed by an upper steady rest seat 4 having a plurality of screw holes 4A arranged in a row in the vertical direction so as to be screwed and fixed to the inner wall via a spacer 7 having a predetermined length. " Is disclosed (see summary).

According to Patent Document 2 (Japanese Unexamined Patent Publication No. 2020-188093), "A transformer has an assembly having an iron core and windings wound around the iron core, and a tank 10 for accommodating the assembly. It is provided with an upper fastener 30 attached to the tank 10 and a content mounting seat 40 provided on the inner wall of the tank 10 which is a connection portion with the upper fastener 30. The mounting portion 31 of the upper fastener 30 is provided. Alternatively, the fixing groove 32 provided on one side of the content mounting seat 40 of the tank 10 and the convex portion provided on the other side of the mounting portion 31 of the upper fastener 30 or the content mounting seat 40 of the tank 10 are fitted to each other to transform the transformer. The contents of the vessel are fixed to the tank 10 "(see summary).

Japanese Unexamined Patent Publication No. 2006-196759 Japanese Unexamined Patent Publication No. 2020-188093

In the above-mentioned power transformer, if the outer box is significantly rusted even though the main body parts such as the iron core and windings are hardly deteriorated, only the outer box is replaced and the transformer main body is used as it is. By performing so-called outer box replacement and repair, it is possible to reduce the cost of the equipment as compared with the case where all the transformer parts are manufactured as new products.

According to Patent Document 1, when the apparent power determined by the specifications of the transformer main body, that is, the outer box is replaced and repaired for a plurality of transformers having the same capacity but different specifications of the transformer main body and the outer box, the transformer is transformed. By using an adjustable fixing mechanism for the fixing part between the instrument body and the outer box, it is possible to handle with one general-purpose replacement outer box. However, in Patent Document 1, additional parts such as a narrow holding piece, a spacer, and a footing wire are used as the adjustable fixing mechanism, which affects workability due to an increase in the number of parts of the entire device, for example, an increase in fastening points. The influence on the reliability of the entire device, the compatibility of the outer box at the time of new production and the general-purpose replacement outer box, etc. are not taken into consideration.

According to Patent Document 2, by fixing the transformer main body using the fixing groove provided in the mounting portion of the upper fastener, the number of parts for fixing the transformer main body is reduced without using fixing bolts. , The fixing structure of the transformer body can be simplified. In addition, the work of fixing the transformer body to the container can be simplified, and the productivity can be improved by reducing the assembly work process. However, in Patent Document 2, compatibility is ensured in which one general-purpose replacement outer box can be used for outer box replacement and repair for a plurality of transformers having the same transformer capacity but different specifications of the transformer body and the outer box. Is not considered.

The present invention enables replacement with one general-purpose replacement outer box while suppressing an increase in the number of parts in outer box replacement repair for a plurality of transformers having the same capacity but different specifications of the transformer body and the outer box. The purpose is.

A preferred example of the transformer of the present invention is a transformer main body having an iron core and windings wound around the iron core, and a transformer having an outer box for accommodating the transformer main body, that is, the transformer main body. An upper fixing bracket attached to the outer box, a mounting seat provided on the inner wall of the outer box, which is a connection portion between the upper fixing bracket, and an outer portion attached below the transformer main body. It is provided with a lower fixing bracket to the box and a vibration stopper provided at the inner bottom of the outer box, which is a connection portion with the lower fixing bracket, and the upper fixing bracket has a bolt hole provided in the mounting seat. The lower fixing bracket has a long hole-shaped fixing groove whose bolt fastening position can be adjusted, and the lower fixing bracket has a multi-stage vibration fixing groove whose fitting position with the vibration provided on the inner bottom of the outer box can be adjusted. It is characterized by having.

Further, as another feature of the present invention, in the transformer, the upper fixing bracket has a fixing groove that fits with a columnar convex portion provided on the mounting seat, and the fixing groove is the fixing groove. It is a groove in the circumferential direction of the outer box, and is characterized in that the convex portion is fitted into the fixed groove by rotating the transformer main body.

Further, as a further other feature of the present invention, in the transformer, the suspended transformer main body is inserted into the outer box and the transformer main body is rotated to be provided on the mounting seat. It is characterized in that the convex portion of the columnar shape is fitted into the fixing groove of the upper fixing bracket and the vibration provided on the inner bottom of the outer box is fitted into the vibration fixing groove of the lower fixing bracket at the same time. And.

According to the present invention, when performing replacement and repair of an outer box for a plurality of transformers having the same capacity but different specifications of the transformer body and the outer box, one general-purpose replacement outer box can be used while suppressing an increase in the number of parts. Can be made possible.

It is a schematic diagram of the transformer main body which is the object of this invention. It is a schematic diagram of the fixed structure of the outer box and the transformer main body in a conventional transformer. It is a top view of the schematic diagram of the lower fastener in Example 1. FIG. FIG. 5 is a schematic diagram of the positional relationship between the lower fastener and the main body vibration immediately after the transformer main body to which the lower fastener is fixed in the first embodiment is inserted into the outer box. FIG. 5 is a schematic diagram of the positional relationship between the lower fastener and the main body vibration after fixing the transformer main body to which the lower fastener is fixed in the first embodiment to the outer box. It is a projection drawing of the main body fixing metal fittings divided into two left and right in Example 1. FIG. It is the schematic of the fixing structure of the transformer main body to which the left main body fixing metal fitting 41 and the right main body fixing metal fitting 42 applied in Example 1. FIG. It is a schematic diagram of the inside of the transformer which fixes the transformer main body to the main body mounting seat 27 of the outer box 10 by using the main body fixing metal fittings 43, 44 in Example 2. FIG. 2 is a plan view of the left main body fixing bracket 43, a front view, a plan view of the right main body fixing bracket 44, a front view, and a right side view of the second embodiment. It is the schematic of the fixing structure of the transformer main body to which the left main body fixing metal fitting 43 and the right main body fixing metal fitting 44 are applied in Example 2. FIG. FIG. 5 is a schematic view showing a state in which the lifted transformer main body in the second embodiment is inserted into the outer box 10 and lowered to a target position immediately before the transformer main body lands on the bottom of the box. After finishing the relative rotation 51 between the transformer main body and the outer box 10 in the second embodiment, the pair of main body mounting seats 27 of the outer box 10 are for fixing the main body of the left main body fixing bracket 43 and the right main body fixing bracket 44. It is a schematic diagram which shows the state which the groove 90 is fitted to the innermost part in the horizontal direction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each figure for demonstrating an embodiment, the same constituent elements are given the same name and reference numeral as much as possible, and the repeated description thereof will be omitted.
Issues, configurations and effects other than those described above will be clarified by the following description of the embodiments.

A schematic diagram of the transformer targeted by the present invention is shown in FIG. As shown in FIG. 1, the transformer targeted by the present invention has a container composed of an outer box 10 and a cover 11, and a transformer composed of an iron core 12 and a winding 13 wound around the iron core 12 in the container. The container body 14 is stored. It is desirable that the container is hermetically sealed. Further, the case where the outer box 10 and the cover 11 are integrated may also be collectively referred to as an outer box. Further, the transformer in the embodiment shown below is an oil-filled transformer having insulating oil which is a liquid for insulating and cooling the transformer main body 14 in the outer box, or a varnish which is a resin. A dry transformer applied to the main body 14 will be described as a representative. Not limited to these, other transformers may be used.

In addition, in FIG. 1, as an example of the transformer targeted by the present invention, there is one iron core which is a magnetic circuit, and an inner iron type in which a winding is wound around the iron core is shown. The present invention is similarly applicable to an outer iron type in which two or more iron cores are used to surround the winding. Further, the present invention can be applied not only to a single-phase transformer for single-phase alternating current but also to a three-phase transformer for three-phase alternating current.

FIG. 2 shows a schematic diagram of a fixed structure between an outer box and a transformer main body in a conventional transformer. In FIG. 2, the main components in the outer box excluding the transformer main body are the upper tightening bracket 20 arranged in the upward direction of the transformer main body and the lower tightening metal fitting 21 arranged in the downward direction of the transformer main body. , The main body fixing metal fitting 22 for fixing the transformer main body and the outer box, and the metal fitting fixing bolt for fixing the upper tightening metal fitting 20 and the main body fixing metal fitting 22 which are arranged in the upward direction of the transformer main body like the upper tightening metal fitting 20. There are five types: a nut 23, a main body fixing bracket 22, and a main body fixing bolt 24 for fixing the main body mounting seat 25 provided with one bolt hole on the inner wall of the outer box.

The main body fixing bracket 22 is a plate material bent in a U shape, and the mounting portions at both ends thereof are positioned at two main body mounting seats 25 facing substantially the central portion of the inner wall of the outer box 10. It is fastened with the main body fixing bolt 24, and is fastened with the upper tightening metal fitting 20 and the metal fitting fixing bolt / nut 23.

The upper fastener 20 and the lower fastener 21 are fixed to the upper part and the lower part of the transformer main body 14 at the time of manufacturing the transformer, respectively. The method of fixing the upper fastener 20 and the lower fastener 21 is not shown, for example, but the outer circumference of the iron core, the upper surface of the upper fastener, and the lower portion are passed through the through holes made in both metal fittings by using a tightening band. Both ends are tied and fixed by crawling around the lower surface of the fastener.

The main body vibration stop 26 is a pair of convex portions provided on the bottom surface of the outer box, and is transformed in the outer box by being fitted into a pair of holes or grooves provided in the lower part of the lower fastener 21. It suppresses the movement of the transformer body and plays an auxiliary role of fixing the transformer body.

The upper tightening bracket 20, the lower tightening bracket 21, and the main body fixing bracket 22 are collectively referred to as metal fittings, and the metal fitting fixing bolts / nuts 23 and the main body fixing bolt 24 are collectively referred to as fixing bolts or simply bolts. Further, the main body shake 26 is simply called a shake.

Hereinafter, examples of the present invention will be described with reference to FIGS. 3 to 12.

FIG. 3 shows a top view of a schematic diagram of the lower fastener in Example 1, and FIG. 4 shows the lower fastener and the main body immediately after inserting the transformer main body to which the lower fastener in Example 1 is fixed into the outer box. A schematic diagram of the positional relationship with the steady rest is shown, and FIG. 5 shows the transformer main body to which the lower tightening metal fitting in the first embodiment is fixed to the outer box (rotating the transformer main body into the vertical groove of the lower tightening metal fitting). The schematic diagram of the positional relationship between the lower fastener and the main body vibration after fitting the main body vibration is shown.

As shown in FIG. 3, the lower fastener in the first embodiment is versatile for any of the spacing, in response to the variation in the spacing between the pair of main body vibrations 26 according to the difference in the specifications of the outer box. The groove portions fitted to the pair of main body anti-vibration 26s have a plurality of main body anti-vibration fixing grooves 30 in a multi-stage shape in the diameter direction of the outer box 10. The main body vibration fixing groove 30 is called a vibration fixing groove at the end.

As shown in FIGS. 4 and 5, even if the vibration of the outer box during production and the installation position of the vibration of the general-purpose replacement outer box are different due to the vibration fixing groove, the vibration is shaken inward of the vibration fixing groove. It is possible to fit the stops. The vibration fixing groove is not limited to the continuous groove shape as shown in FIG. 3, and may be a shape provided with a plurality of single holes.

FIG. 6 shows a projection drawing of the main body fixing bracket divided into two left and right in the first embodiment, and FIG. 7 shows a fixing structure of the transformer main body to which the left main body fixing bracket 41 and the right main body fixing bracket 42 in the first embodiment are applied. The schematic drawing of is shown.

6 (a) and 6 (b) show a plan view and a front view of the left main body fixing bracket 41. 6 (c), (d), and (e) show a plan view, a front view, and a right side view of the right main body fixing bracket 42.

As shown in FIG. 7, the left main body fixing metal fitting 41 and the right main body fixing metal fitting 42 in the first embodiment have a long hole-shaped main body whose bolt fastening position with the upper tightening metal fitting 20 can be adjusted according to the inner diameter of the outer box 10. It has a groove 60 for fixing the fixing bracket and a slot 61 for fixing the main body having a long hole shape in which the bolt fastening position can be adjusted according to the mounting height of the main body mounting seat 25 provided on the inner wall of the outer box.

When producing a transformer or replacing it with a general-purpose replacement outer box, attach the left body fixing bracket 41 and the right body fixing bracket 42 to the top tightening bracket 20 fixed to the transformer body with the bracket fixing bolts. -Temporarily fix it with the nut 23, and insert the suspended transformer body into the outer box 10 to the position shown in FIG. After that, the transformer main body and the outer box 10 are relatively rotated 50 to the position shown in FIG. 5, and the main body anti-vibration 26 is fitted into the main body anti-vibration fixing groove 30. After that, as shown in FIG. 7, the left main body fixing metal fitting 41 and the right main body fixing metal fitting 42 are fastened with the metal fitting fixing bolts / nuts 23 and the main body fixing bolt 24, and the transformer main body is fixed to the outer box 10. To complete.

In the second embodiment, a modification of the main body fixing groove 61 of the left main body fixing metal fitting 41 and the right main body fixing metal fitting 42, and the main body mounting seat 25 provided on the inner wall of the outer box 10 is shown.

9 (a) and 9 (b) show a plan view and a front view of the left main body fixing bracket 43. 9 (c), (d), and (e) show a plan view, a front view, and a right side view of the right main body fixing bracket 44.

As shown in FIGS. 8 and 10, the main body mounting seat 27 is composed of a cylindrical convex portion and has a head having a large cross-sectional area at the tip thereof.

The main body fixing groove 90 shown in FIG. 9 (e) is fitted with the main body mounting seat 27 in order to cope with a change in the mounting height with the main body mounting seat 27 caused by different specifications of the transformer main body and the outer box. It is a groove for fixing the main body with multiple steps to fit in. Each main body fixing groove 90 has an opening at a side end of the main body fixing metal fitting, extends horizontally from the opening, and is bent upward at the end portion.

FIG. 8 shows a schematic view of the inside of the transformer in which the transformer main body is fixed to the main body mounting seat 27 of the outer box 10 by using the main body fixing metal fittings 43 and 44 in the second embodiment.

FIG. 10 shows a fixing structure of the transformer main body to which the left main body fixing bracket 43 and the right main body fixing bracket 44 in the second embodiment are applied, and the main body mounting seat 27 of the outer box 10 is provided in the main body fixing groove 90 of the main body fixing bracket. Indicates the fitted state.

In FIG. 11, the transformer main body lifted by using the main body lifting eyebolt 110 attached to the upper fastener 20 is inserted into the outer box 10 and lowered to the target position immediately before the transformer main body lands on the bottom of the box. (The bottom of the transformer body has not yet landed on the bottom of the box). At this time, the positional relationship between the main body vibration fixing groove 30 of the lower fastener 21 of the lower part of the transformer main body and the pair of main body vibration fixing 26s corresponds to each other as shown in FIG.

While the transformer main body is lowered and suspended until the state shown in FIG. 11, the transformer main body and the outer box 10 are relatively rotated 51. With the relative rotation 51 between the transformer main body and the outer box 10, the horizontal direction of the groove from the opening of the main body fixing groove 90 of the left main body fixing metal fitting 43 attached to the upper tightening metal fitting 20 and the right main body fixing metal fitting 44. The main body mounting seat 27 mounted on the inner wall of the outer box 10 is fitted into the outer box 10.

In FIG. 12, after the relative rotation 51 between the transformer main body and the outer box 10 is completed, the pair of main body mounting seats 27 of the outer box 10 are for fixing the main body of the left main body fixing bracket 43 and the right main body fixing bracket 44. It shows a state in which the groove 90 is fitted to the innermost part in the horizontal direction. At this time, the fitting of the main body vibration fixing groove 30 of the lower fastener 21 of the lower part of the transformer main body and the pair of main body vibration damping 26 has reached the state shown in FIG. The rotation 50 and the rotation 51 are performed at the same time.

After that, the suspended state of the transformer main body is released, the bottom of the transformer main body (which becomes the bottom of the lower fastener 21) is landed on the bottom of the box, and the fixing of the transformer main body and the outer box 10 is completed. Here, as the transformer main body is slightly lowered to land, the pair of main body mounting seats 27 of the outer box 10 are formed of the main body fixing groove 90 of the left main body fixing bracket 43 and the right main body fixing bracket 44. It fits into the groove bent upward at the end in the horizontal direction.

According to the second embodiment, the pair of main body mounting seats 27 of the outer box 10 are attached to the transformer main body in the main body fixing groove 90 of the left main body fixing metal fitting 43 attached to the upper tightening metal fitting 20 and the right main body fixing metal fitting 44. The transformer main body and the outer box 10 are connected to each other without using fixing bolts by fitting them by the relative rotation operation and the hanging operation with the outer box 10. Moreover, the fitting of the main body vibration fixing groove 30 of the lower fastener 21 of the transformer main body and the pair of main body vibration vibration 26 is simultaneously performed by the same rotational operation. As a result, the alignment of the main body fixing bracket and the main body mounting seat and the bolt fastening work are not required, the fixing work between the transformer main body and the outer box 10 is simplified, and the productivity is improved by reducing the assembly work process. Can be done.

10 Outer box 11 Cover 12 Iron core 13 Winding 14 Transformer body 20 Top tightening bracket 21 Bottom tightening bracket 22 Main body fixing bracket 23 Bracket fixing bolts and nuts 24 Main body fixing bolt 25 Conventional and main body mounting seat 26 of the first embodiment Main body anti-vibration 27 Main body mounting seat of Example 2 30 Main body anti-vibration fixing groove of lower tightening metal fitting in Example 1 Left main body fixing metal fitting 42 in Example 1 Right main body fixing metal fitting 43 Left in Example 2 Main body fixing bracket 44 Right main body fixing bracket in Example 2 Relative rotation between the transformer main body and the outer box 10 in the assembly process of Example 1 51 The transformer main body and the outer box 10 in the assembling process of Example 2 Relative rotation 60 Fixing groove for main body fixing bracket and top tightening bracket in Examples 1 and 2 61 Fixing groove for main body fixing bracket and outer box in Example 1 90 Fixing main body fixing bracket and outer box in Example 2 Groove 110 Eye bolt for lifting the main body

Claims (10)

A transformer main body having an iron core and windings wound around the iron core, and a transformer having an outer box for accommodating the transformer main body.
The upper fixing bracket with the outer box attached above the transformer body,
A mounting seat provided on the inner wall of the outer box, which is a connection portion with the upper fixing bracket,
The lower fixing bracket with the outer box attached to the lower part of the transformer body,
It is provided with a vibration stopper provided on the inner bottom of the outer box, which is a connection portion with the lower fixing bracket.
The upper fixing bracket has a bolt hole provided in the mounting seat and an elongated hole-shaped fixing groove whose bolt fastening position can be adjusted.
The lower fixing bracket is a transformer characterized by having a multi-stage vibration fixing groove capable of adjusting a position where it fits with a vibration provided on the inner bottom of the outer box. In the transformer according to claim 1,
The upper fixing bracket is a transformer characterized by having a fixing groove that fits with a columnar convex portion provided on the mounting seat. In the transformer according to claim 2,
The fixing groove of the upper fixing bracket is a groove in the circumferential direction of the outer box.
A transformer characterized in that the convex portion is fitted into the fixed groove by rotating the transformer main body. In the transformer according to claim 3,
The fixing groove is a transformer characterized by comprising a groove bent upward at a terminal portion of the groove extending in the circumferential direction of the outer box. In the transformer according to claim 3,
A wide opening is provided at the entrance of the fixing groove.
A transformer characterized in that the convex portion is fitted from the opening. In the transformer according to claim 3,
The upper fixing bracket is a transformer having a plurality of stages of the fixing grooves in the height direction of the outer box. In the transformer according to claim 2,
A head having a large cross-sectional area is provided at the tip of a columnar convex portion provided on the mounting seat.
A transformer characterized in that the fixing groove and the head are in contact with each other to regulate the position. In the transformer according to claim 1,
The lower fixing bracket has a plurality of vibration fixing grooves in a multi-step manner in the diameter direction of the outer box.
A vibration fixing groove corresponding to the vibration spacing according to the specifications of the outer box is selected, and the vibration provided on the inner bottom of the outer box and the selected vibration fixing groove are fitted. Characterized transformer. In the transformer according to claim 3,
By inserting the suspended transformer main body into the outer box and rotating the transformer main body, the columnar convex portion provided on the mounting seat is fitted into the fixing groove of the upper fixing bracket. A transformer characterized by simultaneously fitting a shaker provided on the inner bottom of the outer box into a shaker fixing groove of the lower fixing bracket. In the transformer according to claim 9,
After rotating the transformer main body, the suspended state of the transformer main body is released, and the bottom of the transformer main body is landed on the bottom of the box, so that the convex portion is the outer box of the fixing groove of the upper fixing bracket. A transformer characterized in that the transformer main body is fixed to the outer box by being fitted into an upwardly bent groove at the end of a groove extending in the circumferential direction of the transformer.

Images