JPH079855B2 - Transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a transformer in which unit transformers are stacked in a plurality of stages.

(Prior Art) Distribution equipment in a building is increasing in capacity due to automation of air-conditioning equipment, lighting equipment, other equipment, and installation of various office equipment, etc. High-pressure and large-capacity ones have been used. On the other hand, it is required to reduce the installation area of the power distribution device in order to facilitate the carry-in of the power distribution device and effectively utilize the floor space of the building. For this reason, how to reduce the installation area of transformers becomes a problem, and instead of installing one large capacity transformer, it is possible to use multiple small capacity transformers stacked in layers. Has been.

(Problems to be solved by the invention) When stacking transformers, the transformer bodies cannot be stacked directly. Therefore, the transformer bodies are individually housed in a case and then stacked. However, if the transformer body is simply housed in the case, there is an extra space between them, and the bottom area of the case becomes relatively large, and the installation area does not decrease so much.

Then, the objective of this invention is providing the transformer which can reduce an installation area.

[Structure of the Invention] (Means for Solving the Problems) In the transformer of the present invention, the fitting portion of the lower frame member is fitted to the lower yoke portion of the iron core of the transformer body, and An upper yoke portion of the iron core is fitted to a fitting portion of a pair of side frame members whose lower end portions are respectively coupled to both end portions of the lower frame member and upper end portions of which project upward from the iron core. A unit transformer is configured by fitting a fitting portion of an upper frame member located below the upper end between the upper end portions of the pair of side frame members to a unit transformer. The lower frame member of the upper unit transformer is fitted and stacked on the upper end of the side frame member.

(Operation) In the transformer of the present invention, since the iron core of the transformer main body is fitted to the fitting portions of the lower frame member, the pair of side frame members and the upper frame member respectively, the excess space is eliminated and the installation area is reduced. Becomes small,
Moreover, since the lower frame members of the upper unit transformers are fitted to the upper ends of the pair of side frame members of the lower unit transformer, they can be stacked easily.

(Example) Hereinafter, one example of the present invention will be described with reference to the drawings.

In FIGS. 1 to 3, reference numerals 1 and 1 denote two stacked three-phase transformer main bodies, which are respectively provided with windings 1b on the inner three legs of an iron core, for example, a winding iron core 1a. It is configured by winding. Each transformer body 1, 1 consists of a lower frame member 2, side frame members 7,
The unit transformers 13 and 13 are supported and fixed to a frame body composed of the upper frame member 8. That is, the lower frame member 2 has a cross-sectional shape with an open upper surface, and the recess is formed in the fitting portion 2a.
And a portion extending outward from this is a flange portion 2b. Then, the lower yoke portion of the iron core 1a of the transformer body 1 is fitted to the fitting portion 2a via the insulating materials 3 and 3 (see FIG. 4). Two holes 5 are provided at each end of the lower frame member 2.
The side plates 4, 4 each having a groove formed therein are attached by welding, and two fixing seats 6, 6 each having a hole 6a formed in the lower surface are attached by welding to both side surfaces of the lower frame member 2. . The side frame member 7 has a cross-sectional shape in which the side surface is open, and the concave portion thereof is the fitting portion 7a. Two side frame members 7 are provided and arranged so that the fitting portions 7a, 7a thereof are opposed to each other, and the lower end portions thereof are respectively joined to both upper end portions of the lower frame member 2 by welding. The inner side width dimension a of the fitting portions 7a, 7a of the side frame members 7, 7 is the fitting portion 2a of the lower frame member 2.
Is formed to be slightly larger than the outer width dimension b of the fitting portion 2a of the lower frame member 2 (see FIG. 6). The fitting portions 7a, 7a of the side frame members 7, 7 are fitted to the outer leg portions of the iron core 1a of the transformer body 1 via an insulating material (not shown). The upper frame member 8 is formed in a box shape, and the fitting portion 8a of the upper frame member 8 has an iron core through an insulating material (not shown).
It is fitted to the upper yoke part of 1a. This upper frame member 8
Has two holes 9 and 9 formed in the side plates 8b at both ends in the longitudinal direction, and the bolts 12 are formed by utilizing the holes 9 and 9 and the holes 11 and 11 formed in each side frame member 7. , 12 are inserted and screwed with nuts (not shown) to be mounted between the upper ends of the side frame members 7, 7 so as to be positioned below the upper ends thereof. In this way, the transformer main body 1, the lower frame member 2, the pair of side frame members 7, 7 and the upper frame member 8 form a unit transformer 13. Numerals 14 and 14 are holes formed at the upper ends of the side frame members 7 so as to correspond to the holes 5 and 5 of the lower frame member 2, and 15
Is a hole for hanging formed in the upper end side surface of each side frame member 7.

Next, a case where two unit transformers 13, 13 are stacked will be described.

A fixing bolt (not shown) is passed through the hole 6a of the fixing seat 6 of the lower unit transformer 13 and fixed to the foundation. Next, a rope (not shown) is hung on the hanging holes 15 and 15 of the unit transformer 13 in the upper stage to lift the unit transformer 13, and the unit transformer 13 is placed above the unit transformer 13 in the lower stage. Then, the upper unit transformer 13 is gradually lowered so that both ends of the lower frame member 2 are paired with the pair of side frame members of the lower unit transformer 13.
It is fitted to the upper end of 7,7 and the flange 2a is attached to the side frame members 7,7.
Place it on the upper edge of. Then, the bolt 16 is inserted into the hole 14 of the side frame member 7 of the lower unit transformer 13 and the hole 5 of the lower frame member 2 of the upper unit transformer 13, and a nut (not shown) is screwed into this to lower the lower stage. Unit transformer 13 and upper unit transformer
Fix 13 and.

According to the above embodiment, the following effects can be obtained.
That is, the iron core 1a of the transformer body 1 is connected to the fitting portion 2 of the lower frame member 2.
a, the fitting portions 7a, 7a of the pair of side frame members 7, 7 and the upper frame member 8
Since the unit transformer 13 is configured by being fitted to the fitting portion 8a of
Unlike the conventional method, there is no extra space, and the installation area can be reduced. Further, when stacking the unit transformers 13, the both ends of the lower frame member 2 of the upper unit transformer 13 are fitted to the upper ends of the pair of side frame members 7, 7 of the lower unit transformer 13. Since this is done, the stacking work can be done easily. Similarly, other unit transformers can be easily stacked in the upper unit transformer 13, so that increase or decrease in capacity can be dealt with promptly by appropriately selecting the number of stacking stages.

Particularly, in the above embodiment, the weight of the upper unit transformer 13 is received by the pair of side frame members 7, 7 of the lower unit transformer 13, so that the unit transformers 13 are stacked in a plurality of stages. Even in such a case, since the weight of the upper unit transformer 13 is not applied to the iron core 1a of the lower unit transformer 13, the electrical characteristics of the lower unit transformer 13 are not deteriorated. Further, since the lower frame member 2 is shaped to form the flange portion 2a, the hot air rising after cooling the lower unit transformer 13 is cooled by the lower frame member 2
Since the flange portion 2a of the unit 2 is cut off, the temperature of the winding of the unit transformer 13 of the upper stage does not increase due to the heat of the unit transformer 13 of the lower stage.

The present invention is not limited to the embodiments described above and shown in the drawings. For example, the unit transformer may have a single-phase structure.

[Effects of the Invention] As is apparent from the above description, the present invention provides a unit transformer including a transformer body, a lower frame member fitted to the iron core of the transformer body, a pair of side frame members, and an upper frame member. Configure
Since the lower frame members of the upper unit transformer are fitted and stacked on the upper ends of the pair of side frame members of the lower unit transformer, the installation area can be reduced and the stacking work can be facilitated. This has the effect of being able to quickly respond to changes in capacity.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a front view of the whole, Fig. 2 is a side view of the same, Fig. 3 is an exploded perspective view excluding a transformer body, and Fig. 4 is Fig. 1. A sectional view taken along the line IV-IV,
5 and 6 are a front view and a side view of a connecting portion of the lower frame member and the side frame member. In the figure, 1 is a transformer body, 1a is an iron core, 2 is a lower frame member, and 2a.
Is a fitting portion, 7 is a side frame member, 7a is a fitting portion, 8 is an upper frame member, 8a is a fitting portion, and 13 is a unit transformer.

Claims (1)

[Claims] 1. A transformer main body, a lower frame member having a fitting portion that fits into a lower yoke portion of an iron core of the transformer main body, and a fitting portion that fits into legs on both sides of the iron core. And a pair of side frame members whose lower end portions are respectively coupled to both end portions of the lower frame member and whose upper end portions project above the iron core, and between the upper end portions of these side frame members from their upper ends. A unit transformer is formed from an upper frame member that is positioned below and has a fitting portion that fits into the upper yoke portion of the iron core, and the upper end portions of the pair of side frame members of the lower unit transformer. A transformer characterized in that a lower frame member of an upper unit transformer is fitted to and stacked in layers.