JPH0132340Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a stationary inductor, and more particularly to improvements in a support column for supporting coils disposed above and below the inductor and an insulator for preventing the column from falling off.

[Background of the idea]

The winding arrangement of a static inductor such as a transformer is generally such that a low voltage winding 2, a high voltage winding 3, and a tap winding 4 are sequentially arranged around the outer periphery of an iron core 1, as shown in the cross section of one side of the transformer in FIG. This tap winding 4 is divided into upper and lower parts. 5 is a high voltage line lead from the high voltage winding 3. A support column is provided between the coils of the tap winding 4 arranged above and below to support these coils, and an insulating layer is installed on the outside to prevent this support column from falling off. It was held in place by a tube. FIGS. 2, 3, and 4 show the structures of conventional support columns and insulating cylinders. In the figure, a plurality of linear spacers 7 are arranged vertically on the outer periphery of a winding tube 6 that covers the outer periphery of the high-voltage winding 3, and support columns 8 are provided on the outside of each spacer. An insulating tube 9 for preventing the support column 8 from falling off was fitted and inserted. Reference numeral 10 designates shield rings for the tap windings 4 located above and below the support column 8.

According to such a conventional structure, the supporting column 8 and the insulating tube 9 must be in close contact with each other, so it is very difficult to insert the insulating tube 9, and the finished dimensions of the insulating tube 9 and the supporting column 8 may be difficult to insert. However, there were drawbacks such as the need to adjust the thickness of the support column 8 before inserting it.

[Purpose of invention]

The present invention has been made in view of the above-mentioned points, and its purpose is to easily and reliably prevent the support columns of the stationary inductor winding from falling off.

[Summary of the idea]

In the present invention, a groove is provided in a part of a support column that supports a stationary inductor winding, and an end ring that fits into the groove and has an open end is provided on the outer periphery of the support column, and near the open end of the end ring. A fixing hole is formed and a string is passed through the fixing hole and tightened to achieve the intended purpose.

[Example of idea]

An embodiment of the stationary inductor according to the present invention will be described below with reference to the drawings.

An embodiment of the present invention is shown in FIG. 5, FIG. 6, FIG. 7, and FIG. 8. In this figure as well, the same parts as in the conventional example shown in FIGS. 2 and 3 are designated by the same numbers. Tap windings 4 are fixedly installed above and below the outer side of the winding insulating tube 6 via linear spacers 7, and a support column 8 is provided in the middle thereof. Shield rings 10 are provided at the upper and lower ends of the tap winding 4, respectively. The support column 8
There is one or more square grooves 11 on the outside of the middle part of the
is formed. This square groove 11 is processed using an ordinary press board or a woodworking tool. An end ring 12, which is a separately manufactured fastener, is fitted into this square groove 11. This end ring 12 is formed by shaping a press board into a roll shape to form a substantially circular ring, and a notch 13 is formed in a part of the end ring 12.
A fixing hole 14 for tightening the support column 8 is formed at both ends of the end ring 12 near the notch 13, and the thickness of the end ring 12 can be easily changed to a circular shape. The width is about 5 mm so that it can be bent in the circumferential direction, and the width is slightly smaller than the width of the square groove 11 formed in the support column 8 so that it can easily fit into the square groove 11. There is.

A method of assembling a support device according to an embodiment of the present invention configured as described above will be described below. Support columns 8 are respectively arranged between the upper and lower tap windings 4 on a plurality of linear spacers 7 fixed to the insulating cylinder 6, and fitted into square grooves 11 formed in the support columns 8. An end ring 12 is attached to the end ring 12, and a string 15, which is a connecting member, is passed through a fixing hole 14 formed near the end of the end ring 11, and the end ring 12 is tightened inward to fix the support column 8.

According to this method, since the end ring 12 is provided with the notch 13, the end ring 1
2 can be easily attached to surround the support column 8 from the outside, and by tightening the string 15, the support column 8 can be reliably prevented from falling off toward the outer diameter side, and the support column 8 can be easily fixed. Therefore, the working time required for fixing the support column 8 is shortened, and the winding work is simplified. Furthermore, since the insulator for fixing the support column 8 is an end ring rather than a cylindrical one, the number of manufacturing steps is reduced and the weight is also reduced. Yet another end ring 1
Since the notch 13 is formed in the support column 8
manufacturing tolerances can be easily accommodated. Further, the fixing method may be performed by using other means, such as a ring, instead of using a string.

[Effect of idea]

As described above, according to the present invention, a square groove is provided in the support column of the stationary inductor winding, and an end ring having a notch is fitted into the square groove and tightened to fix the support column. Therefore, the practical effect of being able to easily and reliably prevent the support column from falling off to the outer circumferential side with a simple structure is great.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the winding arrangement of a transformer, Figure 2
The figure is a partial side sectional view of a conventional winding support device.
The drawing is a plan view of Fig. 2, Fig. 4 is a perspective view of the insulating tube shown in Fig. 1, Fig. 5 is a partial side sectional view showing an embodiment of the present invention, and Fig. 6 is a perspective view of Fig. 5. , FIG. 7 is a perspective view of a support column according to an embodiment of the present invention, and FIG. 8 is a perspective view showing a cutout portion of an end ring of the present invention. 1... Iron core, 2... Low voltage winding, 3... High voltage winding, 4... Tap winding, 6... Insulating tube for winding, 7
...Straight line spacer, 8...Support column, 9...Insulating tube, 11...Square groove, 12...End ring, 13
... Notch, 14 ... Fixing hole, 15 ... String.

Claims (1)

[Scope of utility model registration request] A low voltage winding and a high voltage winding concentrically wound around the iron core, a plurality of tap windings wound around the high voltage winding and arranged in the axial direction of the high voltage winding, and each of these tap windings. A support pillar that is interposed between the wires and supports the tap winding, and a stopper that prevents the support pillar from falling off. and a connecting member for connecting the support column, and the support column has a groove formed on an outer surface thereof into which the band-shaped fastener is inserted.