JPS6034325B2 - Current-carrying conductor support device - Google Patents

Description

Detailed Description of the Invention The present invention relates to a structure of a current-carrying conductor support device that electrically insulates and mechanically supports a current-carrying conductor from a metal cylindrical container in a sealed gas insulated line using high-pressure gas as an insulating medium. Regarding.

Conventionally, this type of current-carrying conductor support device has taken the form as shown in FIG.

In the figure, 1 is a metal cylindrical container with a flange a formed at its end. 2 is a cylindrical current-carrying conductor arranged along the central axis of the cylindrical container 1, and 3 is a disk-shaped solid insulator that supports the current-carrying conductor in the center, and its outer end is held between flanges la and is connected to bolts. It is fixed by 4.

5 isolates the high pressure gas atmosphere 6 formed between the flange la and the outer end of the solid insulator 3 from the outside of the cylindrical container 1 to maintain airtightness.

In the conventional current-carrying conductor support device configured as described above, the direction of the electric field on the current-carrying conductor 2 and the creeping direction of the solid insulator 3 are almost the same, and the creepage distance of the solid insulator 3 is short. Creeping flash phenomenon is likely to occur.

In addition, the disk-shaped solid insulator 3 has problems such as requiring a large amount of material, and the biggest problem is that the O-ring 5 and bolt 4 are used to seal the solid pressure gas. , the solid insulator 3 device is cumbersome and requires a great deal of effort in terms of construction and maintenance. This invention was made in order to solve the above-mentioned problems with conventional current-carrying conductor support devices, and it is possible to easily attach and detach a drum-shaped solid insulator between a current-carrying conductor and a cylindrical container. Therefore, it is an object of the present invention to provide a current-carrying conductor support device that is small and lightweight, does not easily cause creepage flash, and can be easily installed.

Hereinafter, the structure of an embodiment of the support baser according to the present invention will be explained based on FIGS. 2 and 3.

In the figure, the cylindrical container 1, current-carrying conductor 2, and high-pressure gas atmosphere 6 are the same as the conventional one shown in FIG.

Reference numeral 7 denotes a support spacer which is an annular solid insulator and is disposed between the current-carrying conductor 2 and the cylindrical container 1 so that its axis is perpendicular to the axial direction of the current-carrying conductor 2 and one radial direction. , supports the current-carrying conductor 2 with its drum-shaped protrusions at both ends.

Reference numeral 8 denotes an elastic member made of a plate spring, which is housed in a groove 9 formed in the inner wall of the cylindrical container 1 and presses the support spacer 7 toward the current-carrying conductor 2 side.

In one embodiment of the support spacer of the present invention configured as described above, the direction of the electric field on the current-carrying conductor 2 and the creeping direction of the collective insulator 7 are set at the contact surface between the current-carrying conductor 2 and the solid insulator 7. Since it is close to a right angle and has a longer creepage distance than conventional surfacers, creeping flash phenomenon is less likely to occur.

In addition, in the conventional spacer, airtightness was maintained using a ring or the like, but the supporting spacer 7 of the present invention does not require this, and the two current-carrying conductors are connected by a leaf spring 8 housed in a groove 9 formed in the cylindrical container 1. Since it is press-fixed, it is easy to attach and detach, making it very convenient in terms of installation and maintenance. Furthermore, the material can be reduced to 1/4 or 1'5 compared to the conventional one, making it compact and lightweight, making it easy to handle. Although the solid insulator 7 has a drum shape in the above embodiment, it is not limited to this shape, and various shapes can be considered, for example, as shown in FIGS. 4 to 7.

Further, in the above embodiment, the current-carrying conductor 2 of the solid insulator 7
It goes without saying that even more stable support can be obtained by disposing a plurality of conductors around the circumference of the current-carrying conductor 2. Further, in each of the above embodiments, single-phase individual type gas insulated equipment has been described, but it goes without saying that similar effects can be obtained even if this support spacer is applied to three-phase single-activation type gas insulated equipment. . As described above, according to the present invention, a solid insulator is easily attached and detached between the current-carrying conductor and the cylindrical container to support it, so it is small and lightweight and very convenient in terms of implementation and maintenance. This makes it possible to provide a current-carrying conductor support device, which has great practical effects.

[Brief explanation of the drawing]

Figure 1 is a cross section showing an example of the configuration of a conventional insulating spacer.
FIG. 2 is a sectional view showing the configuration of an embodiment of the support baser of the present invention, FIG. 3 is a cross-sectional view taken along the line m--disk in FIG. 2, and FIGS. FIG. 3 is a cross-sectional view showing other embodiments of the invention. In the figure, 1 is a cylindrical container, 2 is a current-carrying conductor, 7 is a supporting spacer (solid insulator), 8 is an elastic member, and 9 is a groove. Note that the same reference numerals in each figure indicate the same or corresponding parts. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. The current-carrying conductor of a sealed gas insulated line comprising a cylindrical current-carrying conductor disposed inside the cylindrical container along the central axis of a metal cylindrical container containing high-pressure gas as an insulating medium. In the support device, the support is made of a solid insulator, which has an axially symmetrical drum shape and whose axis is orthogonal to the axial direction and one radial direction of the current-carrying conductor and is disposed between the current-carrying conductor and the cylindrical container. A current-carrying conductor support device comprising: a spacer; and an elastic member disposed on the inner wall of the cylindrical container to press the support spacer toward the current-carrying conductor.