JPS5851366B2 - Power electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to electrical power equipment having a bushing, and particularly to electrical power equipment having a structure advantageous for assembly.

This type of power electrical equipment has a tank that houses the electrical equipment, a cylindrical part that extends upward almost vertically is formed in the tank, a bushing is fixed to this cylindrical part, and the center conductor of the bushing is connected to the electrical Connect to the device (・ru).

In particular, it is best to install the bushing easily because disassembly work is carried out separately from the tank side main body for transportation reasons and assembled on site.

The bushing also has a center conductor that serves as a current-carrying path, and must be configured to ensure reliable connection to electrical equipment.

Because this connection is constructed into a tank and the bushing is heavy, it becomes an important part in the assembly and disassembly of electrical equipment.

Next, conventional assembly work will be explained using FIG. 1.

The figure shows a gas breaker as an electric power device.

The connection between the connection device 6 such as a current collector attached to the fixed side 3 of the breaker in the tank 2 and the center conductor 5 of the bushing 1 is as follows.
It became blind work.

In other words, the conventional method was to separate the bushing 1 side and the main body side and assemble and connect them.

The bushing 1 side has a cylindrical shield 4 surrounding the center conductor 5 at its lower part, and the cylindrical shield 4 is connected to a metal fitting 50.
is fixed to the bottom of bushing 1.

On the other hand, on the main body side, a connecting device 6 and a guide rod 11 are fixed to a fixed side 3 fixed inside the tank 2 with an insulator, and a guide body 7 inserted from a cylindrical part 10 formed above the tank 2.
is fitted and fixed to the guide rod 11, and the guide body 7 is positioned substantially on the central axis of the cylindrical portion 10.

In this way, conventionally, the bushing side and the main body side are divided into two parts as a unit of equipment. There was a risk of damaging the cylindrical shield 4 due to the vibration.

Since the cylindrical shield 4 is made of teric material that corrects the electric field, you must be careful of even the slightest scratches.

In addition, since the tip of the guide body 7 is largely retracted into the cylindrical portion 10, when the metal fitting 50 and the flange 10a approach each other, the work of fitting the center conductor 5 to the guide body 7 becomes a blind operation, and the center conductor 5 This may result in an unexpected situation where the L and L cannot be connected to the connecting device 6, which may cause an accident.

SUMMARY OF THE INVENTION An object of the present invention is to provide a power electrical device in which a center conductor is reliably connected to a connecting device.

In the present invention, the cylindrical shield of the bushing is fixed to the cylindrical part of the tank on the electrical equipment side, and the guide member that guides the center conductor of the bushing has a tip protruding from or near the upper end of the cylindrical shield. It is fixed to the main body side.

The present invention will be explained below with reference to embodiments shown in the drawings.

Incidentally, as with the electric power equipment, a gas circuit breaker is taken as an example as shown in FIG. 1, but it can also be applied to a transformer, a disconnector, etc.

A guide rod 11 is fixed to the fixing part 3 in FIG. 2 with screws or the like, and a guide body 7 is fitted onto the guide rod 11 to form a guide member.

Although the cylindrical shield 4 is a component of the bushing,
27220 is fixed to the upper part of the cylindrical part 10.

The guide body 7 is disposed within the cylindrical portion 10 and the cylindrical shield 4 so that their center lines are substantially aligned, and its upper end protrudes near or beyond the upper end of the cylindrical shield 4.

As shown in the figure, the cylindrical shield 4 is fixed to the cylindrical part 10, and the guide body 7 inserted from the cylindrical part is attached to the guide rod 11.
Lift up bushing 1 with it fitted and installed,
After confirming the fit between the center conductor 5 and the guide body 7 from the space above the cylindrical shield 4, lower the bushing 1.

Since the center conductor 5 is lowered along the guide body I, it does not damage the cylindrical shield 4 and eventually comes into contact with the connecting device 6.

At the next step L, fix the cylindrical part 10 and the hebutsuing 1 to finish the work.

According to such work, by determining the axial length of the center conductor 5, it is possible to reliably connect the center conductor 5 and the electric equipment in the tank 2.

It should be noted that if centering is possible, the guide body 7 may be fixed directly to the fixing part 3.However, if a support part shown as the guide rod 11 is separately provided as in this embodiment, the guide body 7 and the guide rod can be fixed directly. 11
It is advantageous to be able to absorb some degree of misalignment by adjusting the fitting dimensions and diameter.

Further, if a guide body 7 is provided on the outer periphery of the connecting device 6, the center conductor 5 can be guided into the inside of the guide body 7.

Furthermore, the guide body 7 may be connected to the guide rod 11, etc., which is a part of the receiver.

As described above, the present invention fixes the cylindrical shield 4, which is a component of the bushing, coaxially above the cylindrical part 10,
Moreover, the upper end of the guide member that fits and guides the center conductor 5 is fixed to the electrical equipment side in the tank 2 by protruding from or near the upper end of the cylindrical shield 4, so that the cylindrical shield 4 is not damaged. The conductor between the bushing 1 and the electrical equipment side can be reliably connected.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a conventional electric power device, and FIG. 2 is a longitudinal cross-sectional view of a power electric device according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Bushing, 2... Tank, 4... Cylindrical shield, 5... Center conductor, 6... Connection device, 7...
- Guide body, 10... cylindrical part.

Claims (1)

[Scope of Claims] 1. A cylindrical portion extending substantially vertically above a tank housing an electric device is formed, and a bushing is fixed to the cylindrical portion to electrically connect the center conductor of the bushing and the electric device. A cylindrical shield is fixed to the cylindrical portion and extends upward coaxially with the cylindrical portion and surrounds the center body in the bushing, and is arranged approximately on the central axis of the cylindrical portion. and a guide member having a free end protruding from or near the upper end of the cylindrical shield, and which engages with and guides the center conductor, is fixed to the electrical equipment, and the guide member is fixed to the electrical equipment. A power electrical device, characterized in that a connecting device is provided for electrically connecting the central conductor and the electrical device after insertion. 2. In the item described in claim 1, the guide member includes a guide rod fixed to the electric device;
A power electrical device having a guide body that fits into the guide rod and fits into the center conductor.