JP4986466B2 - Transformer insulation support spacer - Google Patents

Description

  The present invention relates to a transformer insulation support spacer capable of supporting a transformer in an insulated state on a utility pole, particularly a metal utility pole.

  Conventionally, electric poles have been made of concrete, but in confined places and mountainous areas that are difficult to carry in, it is possible to add steel pipe pillars, composite pillars made of concrete base pillars and steel pipes, etc. Metal poles made of a plurality of members may be used.

  When attaching a transformer to these utility poles, for example, a cylindrical transformer supported by a metal utility pole is placed on a pair of braces attached in a direction orthogonal to both sides of the metal utility pole, It is fixed by being wound a plurality of times by a galvanized iron wire or the like with a wood seat interposed between the intermediate portion and the metal utility pole as necessary.

  The electrical equipment technical standards stipulate that predetermined grounding work should be applied to the iron base and the metal outer box of machinery and equipment installed in the electric circuit. As mentioned above, when the transformer is mounted in a state where it is electrically connected to a metal utility pole, according to the same technical standards, it is class A grounding work (ground resistance value of 10Ω or less) for high voltage or extra high voltage. ) Is required. Incidentally, there has been proposed a mounting bracket for attaching an electric device to a brace or a turntable provided on a utility pole (see, for example, Patent Document 1).

  However, when a transformer is mounted, for example, in a region with a lot of rock such as a mountainous area, it is often not easy to ensure a ground resistance value of 10Ω or less. In some cases, it was necessary to use a special method such as driving a grounding electrode deeper than usual, or to ground at a location far away from the transformer. In such a case, a large amount of grounding work was required.

  According to the electrical equipment technical standards, it is said that if the transformer is supported in an insulated state, it can be handled as a class B grounding work that greatly reduces the grounding conditions. Therefore, if the transformer is supported on the power pole with the insulation measures taken, the grounding cost can be greatly reduced.

Japanese Patent Laid-Open No. 7-264738

  This invention is made | formed in view of the said situation, and it aims at providing the transformer insulation support spacer which can support a transformer in an insulated state even if it is a metal utility pole.

In order to achieve the above object, a transformer insulation support spacer according to the present invention according to claim 1 is a spacer used when supporting and fixing a transformer to a brace attached to a utility pole, and is supported by the brace. A brace-side support is provided on one side, a holding and fixing part for holding and fixing the transformer is provided on the other side, formed of an insulating material, and the brace is provided with a fixing bolt for mounting the transformer. The transformer is provided with a bolt seat part to which the fixing bolt is fixed, the armrest side support part is a spacer seat part to which the armor fixing bolt is fixed, and the holding fixing part fixes the bolt seat part it spacers bolts and spacer bolts are holding portion to be held you characterized.

In the present invention according to claim 1, one surface is attached to the arm metal by the armrest side support portion, and the transformer is attached to the other surface by the holding fixing portion, so that the insulating material is made between the utility pole and the transformer. A spacer is interposed. That is, fix the brace fixing bolt to the spacer seat and fix one side to the arm bracket, fix the spacer bolt to the transformer bolt seat and fix the transformer to the other side, A spacer made of an insulating material is interposed between the transformers.

A transformer insulation support spacer according to a second aspect of the present invention is the transformer insulation support spacer according to the first aspect , wherein the spacer seat that is the armrest side support is the same as the bolt seat of the transformer. a shape, a spacer bolt which is held stationary section, characterized in that there is a fixed bolt and the same shape of the cross-arm.

In this invention which concerns on Claim 2 , a spacer can be interposed in the way which fixes a transformer directly to a brace.

  The transformer insulation support spacer of the present invention is a transformer insulation support spacer that can support the transformer in an insulated state even if it is a metal utility pole.

  1 is an external view of a transformer insulation support spacer according to an embodiment of the present invention, FIG. 2 is a front view of the transformer insulation support spacer (as viewed from the transformer side), and FIG. 3 is a transformer insulation. 4 is a back view of the support spacer (as viewed from the utility pole side), FIG. 4 is an illustration of the fixing state of the transformer, FIG. 5 is a cross-sectional view of the support state using the transformer insulating support spacer, and FIG. The cross-sectional view of the state which fixed is shown.

  The installation of the transformer will be described with reference to FIG.

  As shown in the figure, for example, a metal utility pole 1 is provided with an arm metal 3 for attaching a transformer 2, and the arm metal 3 is fixed to the utility pole 1 with a band 5 by a fixing plate 4 extending in the vertical direction. ing. A long hole 6 is formed in the fixing plate 4, and a fixing bolt 7 is held in the long hole 6. The transformer insulating support spacer 11 is fixed by the fixing bolt 7 of the arm metal 3. The transformer 2 is provided with a bolt seat 8 having a shape to which the fixing bolt 7 is fixed. The transformer 2 is lifted to the height of the arm metal 3 and fixed to the arm metal 3 through the transformer insulating support spacer 11. Is done. The transformer insulating support spacer 11 is made of an insulating material. As the insulating material, for example, a sintered material such as alumina, a glass fiber material, various resins, rubber, or the like is used.

  The transformer insulation support spacer 11 will be described with reference to FIGS.

  The transformer insulating support spacer 11 is provided with a frame 12 having a rectangular shape and a substantially U-shaped cross section, which is substantially the same shape as the fixing plate 4 (see FIG. 4) of the arm metal 3 (see FIG. 4). On the side 3 (see FIG. 4), that is, on the back side (in particular, see FIG. 3), a spacer seat portion 13 is provided as a brace-side support portion. The spacer seat 13 has the same shape as the bolt seat 8 (see FIG. 4) of the transformer 2 (see FIG. 4).

  A U-shaped groove 14 and a long hole groove 15 are formed as a holding portion of the holding and fixing portion on the transformer 2 (see FIG. 4) side of the frame body 12, that is, the front side (in particular, see FIG. 2). Spacer bolts 16 as holding and fixing portions are respectively held in the U-shaped grooves 14 and the long hole grooves 15, and the spacer bolts 16 are bolt nuts 8 (see FIG. 4) of the transformer 2 (see FIG. 4) by nuts 17 (see FIG. 5). (See FIG. 4). The spacer bolt 16 has the same shape as the fixing bolt 7 (see FIG. 4) of the armrest 3 (see FIG. 4).

  Details of the state of fixing the transformer 2 to the arm metal 3 using the transformer insulating support spacer 11 having the above-described configuration will be described with reference to FIGS.

  Fixing bolts 7 are held in the long holes 6 of the fixing plate 4 of the armrest 3 fixed to the utility pole 1, and the fixing bolts 7 at the upper and lower portions are inserted into the spacer seat 13 of the transformer insulating support spacer 11. By adjusting the position of the fixing bolt 7 with respect to the long hole 6, the height position of the transformer insulating support spacer 11 with respect to the spacer seat portion 13 is adjusted. The fixing bolt 7 is provided with a nut 9, and by tightening the nut 9, the spacer seat 13 is fixed to the fixing plate 4 of the arm metal 3 with the fixing bolt 7 via the washer 10.

  Spacer bolts 16 are held in the U-shaped groove 14 and the long hole groove 15 of the transformer insulating support spacer 11. The transformer 2 is lifted up to the height of the armrest 3, and the spacer bolts 16 at the upper and lower portions are inserted into the bolt seat 8 of the transformer 2. By adjusting the position of the spacer bolt 16 with respect to the long hole groove 15, the spacer bolt 16 is made to correspond to the position of the bolt seat portion 8 that is different for each type of the transformer 2. By tightening the nut 17 of the spacer bolt 16, the bolt seat portion 8 is fixed to the transformer insulating support spacer 11 by the spacer bolt 16 via the washer 18. That is, the transformer 2 is attached to the arm 3 fixed to the utility pole 1 via the transformer insulation support spacer 11.

  For this reason, the transformer 2 is attached to the utility pole 1 via the transformer insulation support spacer 11 made of an insulating material, and the transformer 2 can be supported in an insulated state. Even if it exists, it becomes possible to treat as B class grounding construction in which grounding conditions are greatly eased. Therefore, the grounding construction cost can be greatly reduced. The spacer seat 13 has the same shape as the bolt seat 8 of the transformer 2, and the spacer bolt 16 has the same shape as the fixing bolt 7 of the arm metal 3. It is possible to interpose the transformer insulation support spacer 11 in the manner of directly fixing.

  INDUSTRIAL APPLICATION This invention can be utilized in the industrial field | area of the transformer insulation support spacer which can support a transformer in an insulated state to a utility pole, especially a metal utility pole.

It is an external view of the transformer insulation support spacer which concerns on the example of 1 embodiment of this invention. It is a front view of a transformer insulation support spacer. It is a reverse view of a transformer insulation support spacer. It is explanatory drawing of the fixed condition of a transformer. It is sectional drawing of the support condition using a transformer insulation support spacer. It is sectional drawing of the state which fixed the transformer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Telephone pole 2 Transformer 3 Arm metal 4 Fixing plate 5 Band 6 Long hole 7 Fixing bolt 8 Bolt seat part 9, 17 Nut 10, 18 Washer 11 Transformer insulation support spacer 12 Frame body 13 Spacer part 14 U-shaped groove 15 Long Hole groove 16 Spacer bolt

Claims (2)

A spacer used to support and fix a transformer to an arm attached to a utility pole, and has a support side supporting part supported by the arm metal on one side, and a holding and fixing part for holding and fixing the transformer On the other side, formed of an insulating material ,
The brace is provided with a fixing bolt for mounting the transformer, and the transformer is provided with a bolt seat portion to which the fixing bolt is fixed.
The armrest side support portion is a spacer seat portion to which a fixing bolt of the armrest is fixed, and the holding fixing portion is a spacer bolt for fixing the bolt seat portion and a holding portion for holding the spacer bolt. Transformer insulation support spacer. The transformer insulation support pacer according to claim 1 ,
The spacer seat that is the armrest side support portion has the same shape as the bolt seat portion of the transformer, and the spacer bolt that is the holding and fixing portion has the same shape as the armature fixing bolt. Transformer insulation support spacer.

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