JPS5918585Y2 - Gas insulated bushing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas insulated bushing device that includes a shield at the boundary between the bushing pedestal and the bushing.

FIG. 1 shows an example of a conventional gas insulating bushing device of this type.

In conventional gas insulated bushing devices, shield 1
was clamped between a bushing flange 3 provided on the outer periphery of the mounting end of the bushing 2 and a bushing pedestal 4, and was fixedly tightened.

In the figure, 5 is a bushing conductor, 6 is a branch pipe of a gas breaker or busbar, and 7 is an insulating spacer.

The bushing 2, bushing pedestal 4, and branch pipe line 6 are filled with insulating gas.

However, in such a structure, the diameter D1 of the bushing pedestal 4 becomes large, and the insulating spacer 7 connected to it becomes large.
However, the diameter of the branch pipe 6 is increased, and the amount of insulating gas required is also increased.

Further, such a structure has the disadvantage that the structure becomes large and the number of parts increases.

An object of the present invention is to provide a gas insulated bushing device that can downsize the bushing pedestal, branch pipes, etc. and reduce the number of parts.

Hereinafter, specific examples of the present invention will be explained in detail with reference to the drawings.

FIG. 2 shows a gas insulated bushing device according to the present invention.

In the gas insulated bushing device of this embodiment, a metal bushing pedestal 4 is attached to a body 4 having a cylindrical shape with a substantially uniform inner diameter.
a, and a bushing receiving flange 4b fixed on the outer periphery receding from the distal end side 4a' of the body 4a, and the body 4a has a diameter D smaller than the inner diameter of the mounting end of the bushing 2.
2, the tip side 4a' is used as the shield 1, and the bushing 2
The mounting end of the bushing 2 is placed on the flange 4b, and the bushing flange 3 fixed to the outer periphery of this mounting end and the bushing receiving flange 4b are fixed with bolts. ing.

Since the distal end side 4a' of the body portion 4a is also used as the shield 1, its inner surface and distal end surface are sufficiently curved.

Along with this, the branch pipe 6 also connects to the body 4 of the bushing pedestal 4.
The diameter D2 is the same as a, and the insulating spacer 7 is also formed to have a small diameter accordingly.

FIG. 3 shows another embodiment of the gas insulated bushing device according to the present invention.

In this embodiment, the tip side 4 of the body 4a of the bushing pedestal 4 is
a' is previously formed integrally with the bushing receiving flange 4b,
The front end side 4a' of the body and the bushing receiving flange 4b are connected to the body 4a by welding.

In other respects, the structure is similar to that of the embodiment shown in FIG.

As explained below, in the gas insulated bushing device according to the present invention, the bushing cradle body, which has a cylindrical shape with an almost uniform inner diameter, has a smaller diameter than the inner diameter of the bushing, and the tip side of this body is inserted into the mounting end of the bushing. Since it is inserted and used as a shield, the diameter of the branch pipe etc. is also reduced, making it possible to downsize the entire structure, and reducing the number of parts, thereby simplifying the structure.

Furthermore, assembly work can be easily performed. Furthermore, there is an advantage that the amount of insulating gas used can be reduced as the structure becomes smaller.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional gas insulated bushing device, and FIGS. 2 and 3 are longitudinal sectional views showing two embodiments of the gas insulated bushing device according to the present invention.

Claims (1)

[Scope of utility model registration request] In a gas-insulated bushing device, a bushing is attached to a metal bushing pedestal having a cylindrical body with a substantially uniform inner diameter, and the bushing conductor in the bushing is insulated with gas. A section is formed to have a smaller diameter than the inner diameter of the mounting end of the bushing, the distal end side of the barrel is inserted into the interior of the mounting end of the bushing, and a bushing receiver is formed on the outer periphery retreating from the distal end of the barrel. A gas insulated bushing device, wherein a flange is fixedly installed, and the mounting end of the bushing is supported by the bushing receiving flange.