JPH0442892Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a wound core transformer comprising a wound core whose outer periphery is banded.

(Prior Art) The conventional structure of this kind of seed-wound core transformer is shown in FIG. In the figure, 1 is the main body of the transformer, which is
It consists of a wound core 3 whose outer periphery is tightened by steel bands 2, 2, and coils 4, 4 wound around both the left and right legs of this wound core 3. In this case, the wound core 3 is constructed by unwinding and cutting a continuously wound silicon steel strip one turn at a time, and winding and laminating each sheet with the cut portions shifted in position, The outer periphery of the wound core 3 is tightened by the bands 2, 2, and the wound core 3 is tightened by the bands 2, 2.
2, a fixing seat member 5 is attached to the lower surface of the wound core 3, and lifting members 6, 6 having holes 6a for lifting are attached to the upper surface of the wound core 3, respectively. It is fixed by tightening it. In this case, when transporting the transformer body 1, the transformer body 1 is lifted up via the lifting members 6, and when installed, it is installed via the seat member 5. There is.

(Problems to be Solved by the Invention) However, the conventional structure described above has the following drawbacks.

(1) Since the band 2 bears all the load on the transformer main body 1 during lifting or the lateral load when the transformer main body 1 is subjected to vibration in the installed state, the band 2 should be It is necessary to tighten the wound core 3, fix the seat member 5, and the lifting member 6, and to have the strength to withstand the above-mentioned loads. Therefore, the size of the band 2 is large, and it is difficult to tighten it. Poor workability.

(2) Since the seat member 5 and the lifting member 6 are interposed between the wound core 3 and the band 2, the seat member 5 and the lifting member 6 may be displaced when the band 2 is tightened, and the work during tightening is also difficult. Bad sex.

(3) In addition, as mentioned above, since the seat member 5 and the lifting member 6 are interposed between the wound core 3 and the band 2, the tightening force of the wound core 3 by the band 2 is not uniform, and the wound core 3 There is a risk that the characteristics of the
Since the tightening force also increases, there is a risk that the characteristics of the wound core 3 may be further deteriorated.

(4) Furthermore, since band 2 is exposed to the outside,
There is a risk that the band 2 will hit a nearby object and break during transportation or installation.

(5) Especially when this structure is used in a dry transformer,
The band 2 is easily rusted, and as the rust progresses, the strength of the band 2 decreases, and there is a risk of breakage when the band 2 is lifted after being used for many years, which is very dangerous.

The present invention has been developed in view of the above circumstances, and its purpose is to facilitate the tightening work of the wound core with a band, without causing any risk of degrading the characteristics of the wound core, and furthermore, It is an object of the present invention to provide a wound core type transformer which can also improve safety during lifting.

[Structure of the invention] (Means for solving the problem) The wound core transformer of the invention is composed of a wound core whose outer periphery is banded and a coil wound around the legs of the wound core. The main body of the transformer has a lower side portion and a pair of side portions extending upward from both ends of the transformer body, and has an approximately shaped seat portion for fixing the lower side portion, and has an upper end portion of the side portions. A lower frame is provided, which has a hole for lifting, accommodates the wound core, and covers the lower outer surface and side outer surface of the wound core, and both ends are connected to the upper side of the lower frame, respectively. It is characterized by the provision of an upper frame that covers the upper outer surface of the wound core.

(Function) In the case of the above, the load on the transformer body during lifting and the lateral load due to vibration during installation can be borne by the lower and upper frames that cover the outer surface of the core, and the band tightens the core. (Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

First, in FIG. 1, 11 is the transformer main body, which consists of a wound core 13 whose outer periphery is tightened by bands 12, 12 (see FIGS. 2 and 3), and the left and right sides of this wound core 13. It is composed of coils 14, 14 wound around both legs. In this case, the wound core 13 is constructed by unwinding and cutting a continuously wound silicon steel strip one turn at a time, and winding and laminating each sheet with the cut portion shifted, The outer peripheral portion thereof is tightened by the bands 12, 12 mentioned above. Now, 15 is the lower frame, which is
A lower side portion 15a extending in the horizontal direction;
It has a general shape with a pair of side parts 15b, 15b extending upward from both the left and right ends of a, and in this case, the lower side part 15a and the side parts 15b, 1
5b are connected to each other by welding. and,
The lower side part 15a of the lower frame 15 has a cross section as shown in FIG. It is installed protrudingly. On the other hand, both sides 15b have an L-shaped cross section as shown in FIG. 3, and have a lifting hole 17 and a bolt insertion hole (not shown) formed at their upper ends. are doing. This lower frame 15 has a lower side portion 15a in a state in which the wound core 13 is accommodated.
This covers the lower outer surface of the wound core 13 via the insulator 18, and the side portion 15b covers the side outer surface of the wound core 13. Further, in this state, the lifting hole 17 and the bolt insertion hole in the side portions 15b, 15b are located higher than the upper end of the wound core 13. On the other hand, reference numeral 19 denotes an upper frame, which has an inverted cross section as shown in FIG. Holes 20 for bolt insertion are formed in each of the holes 19a. Both ends of the upper frame 19 are connected to each other by bolts 21 which are inserted through holes for each bolt in the upper part of the side part 15b of the lower frame 15, and in this state, the upper part of the wound core 13 is connected. It covers the outside.

In the case of the structure described above, when transporting, etc., the side portions 15b, 15b of the lower frame 15 are
The transformer main body 11 is lifted by hooking it into the lifting holes 17, 17, and when installing it,
It is installed via the seat portion 16 of the lower side portion 15a of the lower frame 15.

According to the above configuration, since the load on the transformer body 1 during lifting and the lateral load due to vibration in the installed state are borne by the lower frame 15 and the upper frame 19, the band 12 that tightens the wound core 13 is need not bear such a load;
Therefore, since the band 12 may be strong enough to tighten the wound core 13, it may be small in size, and the tightening operation can be easily performed. Moreover,
Since nothing is interposed between the wound core 13 and the band 12, the work of tightening the band 12 can be performed more easily. Moreover, since nothing is interposed between the wound core 13 and the band 12 in this way, the wound core 13 can be tightened with a uniform force by the band 12, and the size of the band 12 is not large. Therefore, the wound core 13 is not tightened with more force than necessary, and there is no possibility that the characteristics of the wound iron core 13 will be deteriorated. Since the band 12 is covered by the lower frame 15 and the upper frame 19 and is not exposed to the outside, there is no risk that the band 12 will hit a nearby object and break during transportation. Furthermore,
When this structure is applied to a dry transformer, band 12
Even if the strength of the band 12 is reduced due to rust, there is no problem in lifting it because the band 12 does not bear the load during lifting.

In the above embodiment, an inner iron type was illustrated, but the present invention can be similarly applied to an outer iron type.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings; for example, the lower frame 15 has a lower side portion 15a and a pair of side portions 15b, 1.
5b may be integrally formed, and the cross-sectional shapes of the lower frame 15 and the upper frame 19 are not limited to the above-mentioned shapes, and may be modified as appropriate without departing from the gist.

[Effects of the invention] As is clear from the above description, according to the invention, the load on the transformer body during lifting and the lateral load due to vibration during installation are absorbed by the upper frame and lower part that cover the outer surface of the core. Since the burden is borne by the frame, the band that tightens the wound core only needs to have the function of tightening the wound core, and thus the work of tightening the wound core with the band can be easily performed, and the characteristics of the wound core This has an excellent effect in that there is no risk of lowering the safety, and furthermore, it is possible to improve safety during lifting.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention,
Figure 1 is an overall perspective view, Figure 2 is the middle of Figure 1.
3 is a cross-sectional view taken along the same line, and FIG. 4 is a perspective view of the upper frame alone. FIG. 5 is a diagram corresponding to FIG. 1 showing a conventional configuration. In the drawing, 11 is the transformer body, 12 is the band, 1
3 is a wound core, 14 is a coil, 15 is a lower frame, 15
15b is a side portion, 16 is a seat for fixing, 17 is a hole for lifting, and 19 is an upper frame.

Claims (1)

[Scope of utility model registration request] The transformer body includes a wound core whose outer periphery is banded and a coil wound around the legs of the transformer body, and a lower side portion and a pair of side portions extending upward from both ends of the transformer body. It has a general shape, has a fixing seat on its lower side, and has a lifting hole at the upper end of its side. 1. A wound core type transformer comprising: a lower frame that covers an outer surface; and an upper frame that has both ends connected to upper side portions of the lower frame and covers an upper outer surface of the wound core.