JPH0246173Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a distribution pole transformer that can be mounted integrally with a utility pole.

[Prior art]

In the conventional power distribution system, power distribution equipment such as transformers and cut-out switches are installed on pole arms attached to utility poles using mounting brackets, and high and low voltage distribution lines are installed on the pole arms. Since the electric wires are installed while being held in place by supporting insulators, wiring such as the power distribution lines and connecting lines on the high and low voltage sides of the transformers are exposed and intersected above the road, which is unfavorable from the aesthetic point of view of the city.

[Purpose of invention]

The object of the present invention is to eliminate the above-mentioned drawbacks and provide a pole-mounted power distribution transformer that can be mounted on a pole with a simple structure without impairing the aesthetic appearance of the city.

[Summary of the idea]

In the present invention, a substantially circular content storage part is formed in the center of a case with a cylindrical external appearance, the contents of the transformer are stored in this content storage part to form a transformer, and this transformer is mounted on a pole. The upper and lower utility poles are integrally clamped and fixed between the upper and lower utility poles, which are divided into two near the top of the utility pole, without using pole mounting materials such as armrests or pole mounting hardware. An object of the present invention is to provide a power distribution transformer that is shaped like a pillar.

[Example of idea]

Embodiments of the present invention will be described below with reference to FIGS. 2 to 7.

1 is a transformer case, and as shown in FIGS. 1 and 6, its structure consists of a cylindrical body 1a formed from a steel plate into a cylindrical shape, and a pair of side plates 1b inserted into this cylindrical body 1a. The side ends of each side plate 1b are welded to the inner circumferential surface of the cylinder body 1a, with an approximately crescent-shaped cavity 2 being formed between the flat plate surface of the side plate 1b and the inner circumferential surface of the cylinder body 1a. In the center of the cylindrical body 1a, there is a content storage part 1 having a substantially elliptical cross section for accommodating the transformer content 6.
c is formed. Reference numeral 3 denotes a corrugated heat dissipation fin protruding toward the inside of the cavity 2 on the side plate 1b constituting the contents storage part 1c; 4 denotes a bottom plate of the contents storage part 1c; 5
is a cover formed in a substantially oval shape similar to the bottom plate 4, and is installed oil-tightly by bolting it to the flange portion 1d provided around the inside of the upper opening end of the contents storage portion 1c via a gasket. Installed. 6 is the transformer contents stored together with insulating oil in the contents storage part 1c of the case 1; 7 and 8 are the high-voltage bushing and low-voltage bushing mounted on the cover 5; 9
is a cylindrical support tube protruding downward from the center of the bottom plate 4 of the contents storage part 1c, and around this support tube 9, as shown in FIGS. 4 and 7, there are support tubes 9 and A plurality of support plates a are attached to the lower side of the bottom plate 4 facing downward at predetermined intervals. Reference numeral 10 is a hollow steel pipe telephone pole, and the vicinity of its top is crossed and divided into two parts. Of the utility poles 10 divided into two, at the lower end of the upper utility pole 11a, there is a skirt-shaped upper covering tube 12 that covers the upper part of the transformer.
is welded to the upper end circumferential surface of the lower utility pole 11b.
A fixing plate b is attached at a position corresponding to .
Reference numeral 13 denotes a funnel-shaped lower cover tube that covers the transformer mounting part between the lower part of the transformer and the upper part of the lower utility pole 11b, and is formed by dividing into two in the vertical direction, and the funnel part has many air holes. 14 are drilled. Further, an air vent hole 15 is bored in a portion corresponding to the heat dissipation fin 3 on the upper part of the cylinder 1a constituting a part of the contents accommodating portion 1c. Reference numeral 16 indicates an insulator for holding the high-voltage side distribution line provided at the upper end of the upper utility pole 11a, 17 indicates an insulator for holding the low-voltage side distribution line provided at the upper end of the lower utility pole 11b, and 18 indicates an insulator on the opposite side of the upper utility pole 11a from the insulator 16. This is a lid body that covers an open operation window (not shown).

Next, the case of assembling and mounting the transformer of the present invention on a pole will be explained.

First, the transformer contents 6 are installed in the contents storage part 1c of the transformer case 1, and insulating oil is injected, and then the cover 5 is attached to the upper open end of the contents storage part 1c, and the transformer X is assembled. End. Next, when mounting the transformer X on a pole, as shown in FIG. , inserted into the upper open end of the lower utility pole 11b. After this, the support plate a protruding from the bottom plate 4 of the case 1 and the lower utility pole 11
As shown in FIG. 7, the fixing plate b attached to the fixing plate b is fixed with tightening bolts and nuts, and the transformer X is mounted and fixed on the lower utility pole 11b. Next, the connecting wire c was connected to the low voltage bushing 8, and this connecting wire c was suspended inside the cavity 2 of the case 1, pulled out from the air hole 14 of the lower cover tube 13 divided into two, and attached to the lower utility pole 11b. It is connected to the conductive part of the insulator 17.
After connecting the connection line c, the lower cover tube 1 divided into two parts
3 is fixed to the lower peripheral edge of the transformer X with a tightening bolt to cover the lower part of the transformer X. Next, connect the connecting wire d to the high-voltage bushing 7, insert this connecting wire d into the upper utility pole 11a, and then insert the upper utility pole 11a with the upper cover tube 12 attached to the lower side into the case 1 of the transformer Fits on top. Next, the upper cover tube 1
The transformer X
As shown in FIG. 1, it is integrated with the telephone pole 10 and installed on the pole. Thereafter, the connection wire d is connected to the conductive portion of the insulator 16 using the operation window (not shown) of the upper utility pole 11a, and then the operation window is covered with the lid 18. After installing the transformer The distribution line is insulator 1
7 and is connected to the consumer side. The connection portion between the conductive portions of the insulators 16 and 17 and the power distribution line is covered with a rubber cover (not shown).

Although the present invention has been described with an example in which the corrugated heat dissipation fins 3 are attached to the side plate 1b, a heat dissipation fin formed directly on the side plate 1b may be used as the side plate of the case.

Further, instead of forming the lower cover tube 13 into a funnel shape using an iron plate with air holes 14 formed therein, a wire mesh may be stretched in the shape of a funnel.

Furthermore, in the case of underground wiring, the high and low voltage distribution lines may be directly connected to the high and low voltage bushings 7 and 8 through the utility poles.

Furthermore, the case 1 may be made vertically long to accommodate a plurality of transformers.

[Effect of idea]

As explained above, in the present invention, a transformer case is formed in the center of a somewhat large-diameter cylindrical body using a hollow utility pole, and the transformer case is equipped with an oval-shaped content storage part in cross section. The contents of the transformer case are accommodated together with insulating oil to form a transformer, and the transformer is inserted into each of the upper and lower utility poles between an upper utility pole and a lower utility pole that divide the area near the top of the utility pole into two. Since it is constructed so that it is integrally clamped and mounted on the pillar, it has the following effects.

Since a part of the contents storage part that stores the contents of the transformer is formed integrally with the cylindrical transformer case, the transformer with the transformer contents stored in the contents storage part is placed near the top. Even if it is installed by sandwiching it between the utility poles that are divided into upper and lower parts, as mentioned above, a part of the contents storage part is formed in common with the transformer case and is exposed to the outside.
Even if the content accommodating portion is located substantially within the transformer case, the insulating oil filled in the content accommodating portion can be cooled well, and a rise in temperature of the transformer can be effectively suppressed.

In addition, since the transformer is constructed so that it is integrated with the pole near the top of the pole with its case part slightly bulging out from the body of the pole, it is not possible to use pole mounting materials. It is economical because there is no need to mount it on a pole, and since it has the same shape as a utility pole, it significantly improves the aesthetic appearance of the city compared to conventional transformers that are installed using pole arms, etc. can be done.

Furthermore, when the transformer is sandwiched between utility poles that are divided into two near the top, a support tube protruding from the bottom plate of the transformer is fitted into the lower utility pole of the divided utility poles, and the transformer is attached to the bottom plate of the transformer. The transformer can be fixed to the utility pole by integrally fixing a support plate disposed at a spaced interval around the periphery of the support tube and a fixing plate disposed corresponding to the support plate on the lower utility pole side. Since the transformer is configured so that it can be mounted on the pole, the work of installing the transformer on the pole can be done quickly and easily, and the upper part of the transformer is covered with a skirt-like upper cover installed on the upper utility pole.
It is now possible to reliably cover the high and low voltage bushings exposed on the top of the transformer while insulating them from the outside. Another advantage is that the upper transformer can be mounted on poles without disturbing the aesthetics of the city.

[Brief explanation of the drawing]

Figure 1 is a front view showing the transformer of the present invention in a pole-mounted state, Figure 2 is a longitudinal sectional view of the transformer of the present invention, Figure 3 is a sectional view taken along line A-A in Figure 2, and Figure 4 is An explanatory diagram showing the case where the transformer of the present invention is mounted on a pole, Fig. 5 is a sectional view taken along line B-B in Fig. 2, Fig. 6 is a sectional view taken along line C-C in Fig. 2, and Fig. 7 is a sectional view taken along line C-C in Fig. 2. FIG. 3 is a sectional view taken along line DD in FIG. 2; 1...
Case, 10...Electric pole, 11a... Upper utility pole, 1
1b... lower utility pole.

Claims (1)

[Scope of utility model registration request] A cylindrical transformer is provided in the center of a cylindrical body 1a with a content storage part 1c having a bottom plate 4 and a substantially elliptical cross section with a part thereof exposed to the outside with a pair of side plates 1b interposed therebetween. A transformer case 1 is formed, and the contents 6 of the transformer are accommodated in the contents storage part 1c of this case 1 along with insulating oil, and a cover 5 is provided at the upper open end.
A plurality of support plates a are vertically disposed on the bottom plate 4 at the bottom of the transformer A tube 9 is provided to protrude downward, and this support tube 9 is inserted into the upper open end of a lower utility pole 11b, which is obtained by dividing the top of the utility pole 10 into two, and a fixing plate b provided on the lower utility pole 11b is inserted.
The transformer 1. A pole-mounted transformer for power distribution, characterized in that an upper utility pole 11a is attached with a skirt-like upper cover tube 12 that covers the upper utility pole 11a.