JPH079856B2 - Transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Configuration of Invention] (Field of Industrial Application) [0001] The present invention relates to a transformer in which transformer bodies 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 ones have been used. Further, there is a tendency to perform detailed power management for power saving such as partial lighting. Therefore, instead of installing a large capacity high voltage transformer at one location under the ground and distributing electricity to each floor, a small or medium capacity high voltage transformer is installed in each floor or in order to reduce loss during light load. Up to every 3rd floor, the power is being distributed to the floors assigned to it.

(Problems to be Solved by the Invention) Conventional transformers, particularly dry transformers, have a structure in which the mechanical strength of the transformer itself depends on the iron core, and the cooling method is natural cooling by air. It is common to use one with a small height and a large width.
Therefore, the installation area becomes large and a large floor space is required for each transformer installation floor.

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) A transformer of the present invention is one in which a plurality of transformer bodies are stacked in a plurality of stages, and an iron core of a transformer body in a lower stage. The fitting portions of the lower frame member are fitted to the lower yoke portions of the lower frame members, and the lower ends are coupled to the both ends of the lower frame member to the leg portions on both sides of the iron cores of the plurality of stacked transformer bodies. The pair of side frame members are fitted to each other, and the fitting portion of the supporting frame member is fitted to the lower yoke portion of the iron core of the upper transformer body, and the supporting frame member is fitted to the lower transformer. It is located above the main body and is mounted between the pair of side frame members, and an upper frame member is mounted between the pair of side frame members corresponding to the iron core of the uppermost transformer main body.

(Operation) According to the transformer of the present invention, the transformer main body is divided into a plurality of parts, and the iron core of the lower transformer body is fitted into the fitting portion of the lower frame member, and a plurality of transformers are stacked. Since the legs on both sides of the iron core of the container body are fitted to the fitting portions of the pair of side frame members,
The installation area is small. Further, the support frame member in which the iron core of the upper-stage transformer body is fitted is located above the lower-stage transformer body and is attached between the pair of side frame members, and the upper frame is provided between the pair of side frame members. Since the members are attached, a plurality of transformer main bodies can be easily stacked.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

Reference numerals 1, 1 denote a plurality of, for example, two, three-phase transformer bodies stacked in layers, each of which is constructed by winding a winding 1b around three legs of an iron core, for example, a winding iron core 1a. There is. Reference numeral 19 is a frame for housing these transformers 1 and 1, which is a lower frame member.
2, a pair of side frame members 4, 4, a supporting frame member 7 and an upper frame member 13
It consists of That is, the lower frame member 2 has a cross section with an open upper surface. The concave portion serves as the fitting portion 2a, and the portion extending outward from the concave portion serves as the flange portion 2b. Then, the lower yoke portion of the iron core 1a of the lower transformer main body 1 is fitted to the fitting portion 2a via the insulating materials 3 and 3 (see FIG. 4). The pair of side frame members 4, 4 are cross-sections with open sides The lower end portion is joined to both end portions of the lower frame member 2 by welding, and the concave portions that open to the side are the fitting portions 4a, 4a, which are stacked in layers through an insulating material (not shown). The cores 1a, 1a of the transformer bodies 1, 1 are fitted to the legs on both outer sides. 5 and 5 are welded to the lower end of each side frame member 4 by 2
The fixing seats are attached one by one, and the holes 6 are formed in the lower surface thereof. The support frame member 7 has a cross section with an open upper surface. The concave portion serves as the fitting portion 7a, and the portion extending outward from the concave portion serves as the flange portion 7b. Then, the transformer main body 1 in the upper stage is connected to the fitting portion 7a via an insulating material (not shown).
The lower yoke portion of the iron core 1a is fitted and side plates 9, 9 having holes (not shown) at both ends are attached. The support frame member 7 has holes formed in substantially the middle portion of each side frame member 4 and holes formed in each side plate 9 (neither is shown).
The nut 11 is screwed into the bolt 10 that has been inserted into the side frame members 4 and 4 so as to be positioned above the lower transformer body 1. Reference numeral 12 is a pressing member attached to the central portion of the lower surface of the support frame member 7, the lower surface of which is in contact with the upper surface of the iron core 1a of the lower transformer body 1,
As a result, space portions 12a are formed on both sides thereof. The upper frame member 13 has a box shape so that the inside thereof is the fitting portion 13a, and two holes 14 are formed in the side plates 15 at both ends, and the fitting portion 13a is the upper stage transformer. It is fitted to the upper yoke portion of the iron core 1a of the main body 1. This upper frame member 13
Are holes 16, 16 of which both ends are formed in each side frame member 4, respectively.
By mounting a nut (not shown) on the bolts 17 and 17 inserted into the holes 14 and 14, they are mounted between the upper ends of the side frame members 4 and 4 so as to be positioned below the upper ends thereof. There is. The windings 1b, 1b of the upper and lower transformer bodies 1, 1 are used individually or connected in parallel and used.
Reference numeral 18 denotes a hanging hole formed in the upper end side surface of each side frame member 4.

According to the above embodiment, the following effects can be obtained.
That is, since the two transformer bodies 1 and 1 are stacked in the upper and lower stages, it is possible to obtain the capacity equivalent to two transformer bodies 1 in the installation area for one transformer body 1. . Therefore, the installation area can be significantly reduced as compared with the conventional case where one large transformer having a capacity equivalent to two transformer main bodies 1 is installed. Moreover, the iron core 1 of the transformer body 1,1
a and 1a are the fitting portion 2a of the lower frame member 2, the fitting portions 4a and 4a of the pair of side frame members 4, 4, the fitting portion 7a of the support frame member 7, and the upper frame member 13
Since it is fitted to the fitting part 13a of the
There is no extra space on the left and right sides of a and 1a, and the installation area can be further reduced. Then, when stacking the upper-stage transformer main body 1, it suffices to mount the support frame member 7 between the pair of side frame members 4, 4 and insert the upper-stage transformer main body 1 from above. Easy stacking work.

In particular, in the above embodiment, since the weight of the upper transformer body 1 is received by the pair of side frame members 4, 4, even when the transformer bodies 1 are stacked in two stages, the lower transformer body is stacked. The weight of the upper transformer body 1 is not applied to the first iron core 1a, and the electrical characteristics of the lower transformer body 1 are not deteriorated. In addition, the side frame member 7 Since the flange portion 7a is formed as described above, the flange portion 7a of the side frame member 7 blocks the hot air that rises after cooling the lower transformer body 1 and thus the heat of the lower transformer body 1 is blocked. Therefore, the temperature rise of the winding 1b of the upper transformer body 1 does not increase. When one of the transformer main bodies 1 and 1 fails and needs to be replaced, it is not necessary to replace the entire transformer, only the one that has failed is replaced. It is easy because only one container body 1 is required.

FIG. 5 shows another embodiment of the present invention. The difference from the above embodiment is that a pair of long side frames having fitting portions 20a, 20a instead of the side frame members 4, 4 are provided. Using the members 20 and 20, another support frame member 7 is attached between the lower transformer body 1 and the upper transformer body 1, and the fitting core 7a of the middle transformer body 1 is fitted to the supporting frame member 7. The lower yoke portion of 1a is fitted and three transformer bodies 1 are stacked, and each winding 1b is used alone or connected in parallel.
In this case, when the capacity of the two transformer bodies 1 and 1 is sufficient, the upper-stage transformer body 1 may be omitted and the upper-stage transformer body 1 may be provided when the capacity becomes insufficient. . Therefore, also in this embodiment, the same effect as that of the above embodiment can be obtained.

The present invention is not limited to the embodiments described above and shown in the drawings. For example, a pair of long side frame members may be used to form a plurality of four or more transformer main bodies 1. It is also possible to stack, and by appropriately selecting the number of stacking stages, it is possible to quickly deal with increase and decrease in capacity, and the transformer main body 1
It is easy to carry in and replace. In addition, the transformer body 1
May have a single-phase structure.

[Effects of the Invention] As is clear from the above description, the present invention allows a plurality of stacked transformers to be stacked by fitting the fitting portion of the lower frame member to the lower yoke portion of the iron core of the lower transformer body. The lower end of the iron core of the upper transformer body is fitted by fitting the fitting portions of the pair of side frame members whose lower ends are respectively coupled to both ends of the lower frame member to the legs on both sides of the iron core of the transformer main body. The fitting part of the support frame member is fitted to the iron part, and the support frame member is located above the transformer main body in the lower stage and is attached between the pair of side frame members, and between the pair of side frame members. Since the upper frame member is attached in correspondence with the iron core of the uppermost transformer main body, the installation area can be reduced, and the stacking work is easy.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is an overall front view, FIG. 2 is a side view of the same, FIG. 3 is an exploded perspective view of a framework, and FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is a view corresponding to FIG. 1 showing another embodiment of the present invention. 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, 4 and 20 are a pair of side frame members, 4a and 20a are fitting portions,
Reference numeral 7 is a support frame member, 7a is a fitting portion, 13 is an upper frame member, 13a is a fitting portion, and 19 is a framework.

Claims (1)

[Claims] 1. A lower frame member for stacking a plurality of transformer bodies in a plurality of stages, the lower frame member having a fitting portion for fitting to a lower yoke portion of an iron core of a lower transformer body. And a pair of side frames in which the lower ends of the plurality of stacked transformer main bodies are fitted to the legs on both sides of the iron core and the lower ends thereof are coupled to both ends of the lower frame member. And a support frame member having a fitting portion which is located above the lower-stage transformer body and which is mounted between the pair of side frame members and which is fitted to the lower yoke portion of the iron core of the upper-stage transformer body. And an upper frame member attached between the pair of side frame members corresponding to the iron core of the uppermost transformer body.