JPH0127225Y2 - - Google Patents

Description

[Detailed explanation of the invention] The present invention is a multi-pleat drum type insulator that maintains the multi-pleat structure without increasing the size.
This relates to an insulator that has a deep groove structure around the shaft and has improved salt and dust resistance.

Conventionally, there is a drum-type support insulator as shown in Figure 1 as this type of support insulator, but this has a structure in which support metal fittings 2 are embedded in the upper and lower parts of the multi-pleat insulator 1, and it is suitable for indoor use. This is used as an insulator, but when used outdoors, the creepage distance between the upper and lower support fittings 2 is short, and the surface is easily soiled, so it should not be used outdoors or in salt dust-prone areas, especially in coastal areas. If it gets dirty during use,
This will generate leakage current and eventually lead to uneven heat damage.
It cannot normally be used outdoors.

The present invention is a multi-fold drum type support insulator that has been improved so that it can be used outdoors, especially in areas affected by salt dust.As shown in Figures 2 and 3, the base of the mounting bolt 12 is mounted at the center of the upper part. A deep part 4' for cementing the base 7' of the mandrel 7 and a deep part 4' for cementing the base 7' of the mandrel 7, which has a threaded part 6 at the center of the lower part to which various conductor gripping fittings 5 can be screwed, and a deep part 4' for cementing the base 7' of the mandrel 7; The base 3 of the mounting bolt 12 is inserted into the mounting hole 10 of the multi-pleat insulator 1, which has deep holes 4 arranged vertically to maintain a constant distance between the multi-pleat insulator 7 and the multi-pleat insulator 1.
This insulator has a multi-pleat drum type deep groove structure in which the base 7' of the mandrel 7 is cemented into the deep part 4'.

As shown in FIG. 3, the insulator is screwed onto the structure 11 using the mounting bolts 12 of the present invention, and the conductor 13, such as a rigid trolley, is gripped onto the threaded part 6 of the mandrel 7. A metal fitting 5 is screwed onto the metal fitting 5, and a conductor 13 such as a rigid trolley is supported on the conductor gripping metal fitting 5, thereby supporting the conductor 13 in an insulating manner.

The advantage of the insulator of the present invention is that without changing the shape of the multi-pleat drum type insulator, the upper and lower support metal fittings are shaped like a shaft, so the area occupied by the support metal fittings on the insulator is small, which makes it easier to use than the conventional multi-pleat drum type insulator. Greater creepage distance than drum insulators.

Further, deep hole portions 4 are provided in a vertical line below the deep portion 4' where the base 7' of the mandrel 7 is cemented, maintaining a constant distance between the mandrel 7 and the insulator 1. Since the deep groove 8 is formed in between, it is not necessary to make the porcelain part extra large in order to provide a deep groove part, unlike when a deep groove is provided separately in the porcelain part, and the same effect can be obtained with a compact shape. can.

Moreover, since the deep groove 8 is narrow and deep, it is difficult for salt dust to penetrate deep into the deep groove, and therefore it is difficult to get contaminated. , leakage current is less likely to occur, and the creepage distance is increased by the length of the groove, making it possible to use outdoors.

Furthermore, it has many excellent functions, such as being able to easily attach conductor gripping fittings of any shape to the threaded portion 6 of the mandrel 7.

As described above, the insulator of the present invention is an insulator characterized by providing deep grooves around the shaft without increasing the size of the conventional multi-pleat drum type insulator, thereby providing the same level of stain resistance as deep groove insulators. .

[Brief explanation of the drawing]

Fig. 1 is a front view showing a partial cross section of a conventional drum-shaped support insulator, Fig. 2 is a front view showing a partial cross section of the insulator of the present invention, and Fig. 3 is an example showing how the insulator of the present invention is used. figure. 1 is a multi-fold insulator, 2 is a support metal fitting, 3 is a base of a mounting bolt 12, 4 is a deep hole, 4' is a deep part of the deep hole 4, 5 is a conductor gripping metal fitting, 6 is a threaded portion of a mandrel 7,
7 is a mandrel, 7' is the base of the mandrel 7, 8 is a deep groove, 9 is a cementing hole, 10 is a mounting hole, 11 is a structure, 1
2 is a mounting bolt, 13 is a conductor.

Claims (1)

[Claims for Utility Model Registration] A mandrel 7 which has a mounting hole 10 in the upper center for cementing the base 3 of the mounting bolt 12, and a lower threaded part 6 into which various conductor gripping fittings 5 can be screwed in the lower center. A mounting hole for a multi-pleat insulator 1, which has a deep part 4' for cementing the base 7' of the multi-pleat insulator 1, and a deep hole part 4 below which is arranged vertically to maintain a constant distance between the mandrel 7 and the multi-pleat insulator 1. 10 is the base 3 of the above-mentioned mounting bolt 12.
A multi-pleat drum type deep groove insulator characterized by a structure in which the base 7' of the mandrel 7 is cemented into the deep part 4'.