JP2000030830A - Conductor connection for gas insulated electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conductor insulating part for a gas insulated electric apparatus having an improved current capacity and a simplified shield structure. SOLUTION: In this conductor connection for a plug-in contact type gas insulated electric apparatus, plural contacts 8 are disposed between a socket side conductor end part 3 and a plug side conductor end part 5 facing to the socket side conductor end part 3. The socket side conductor end part 3 and the plug side conductor end part 5 have cylindrical shapes respectively. Each the contact 8 contacts with inner faces of both the socket side conductor end part 3 and the plug side conductor end part 5, while a front end of the plug side conductor end part 5 is inserted in the socket side conductor end part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor connecting portion of a gas-insulated electric device using a plug-in contact method.

[0002]

2. Description of the Related Art In a gas-insulated electric device (for example, a pipeline air transmission line, a gas-insulated switchgear, and the like), a plug-in contact method is used in which a conductor can be thermally expanded and contracted at a conductor connection portion. FIG. 3 shows a conductor connecting portion using a conventional plug-in contact method, wherein 31 is a conductor, 32 is a contact,
3 is a leaf spring. Reference numeral 34 denotes a cylindrical shield cover provided on the conductor 31 on the socket side. The plurality of contacts 32 provided on the outer periphery of the socket-side conductor end 31a of the conductor 31 are pressed by the leaf springs 33 by pressure from the inner surface of the shield cover 34, and the socket-side conductor end 31a of the conductor 31 and the plug-side conductor end 31a. It comes into contact with the outer peripheral surface of the conductor end 31b, and electrically connects the conductors 31, 31. In the conductor connection portion using the plug-in contact method, power can be supplied simply by inserting the plug-side conductor end 31b of the conductor 31 into a plurality of contacts 32 arranged in a cylindrical shape.

[0003]

However, the above-mentioned conductor connection portion has a problem that it is difficult to increase the current capacity. That is, the shield cover 34 that covers the outside of the contact 32 is connected to the conductor 31, and the outer diameter is restricted. Therefore, the socket-side conductor end 31a and the plug-side conductor end 31b of the conductor 31 further inside the contact 32 provided inside the shield cover 34 are connected to the conductor 31.
The outer diameter is smaller and the cross-sectional area is smaller.
Therefore, the current capacity of the conductor connection portion is restricted by the socket-side conductor end 31a and the plug-side conductor end 31b, and is lower than the original current capacity of the conductor 31.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a plug-in contact in which a plurality of contacts are arranged between opposed socket-side conductor ends and plug-side conductor ends. In the conductor connection part of the gas-insulated electrical equipment according to the method, the socket-side conductor end and the plug-side conductor end have a cylindrical shape, and the contact contacts the inner surfaces of the socket-side conductor end and the plug-side conductor end, The end of the plug-side conductor end is inserted into the socket-side conductor end.

According to the present invention, since the plurality of contacts are located inside the cylindrical socket side conductor end and the plug side conductor end, the maximum outer diameter of the socket side conductor end and the plug side conductor end is: The size of the contact can be set to the maximum allowable value in the electric field without being restricted by the shape and arrangement of the contact, and the current capacity is improved as compared with the conventional case. Further, since the tip of the plug-side conductor end is inserted into the socket-side conductor end, the socket-side conductor end has a function of shielding.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partial cross-sectional view of one embodiment of a conductor connecting portion of a gas-insulated electric device according to the present invention, and FIG. 2 is a partial cross-sectional view along AA in FIG. In addition,
In FIG. 1, the connection structure is partially omitted.
In FIG. 1, 1 and 2 are conductors to be connected, 3 is a socket-side conductor end attached to the conductor 1 with a bolt 4, and 5 is a plug-side conductor end attached to the conductor 2 with a bolt 6. The socket-side conductor end 3 and the plug-side conductor end 5 have a bottomed cylindrical shape, and the inner surfaces thereof are silver-plated. The inner diameter of the socket-side conductor end 3 is larger than the outer diameter of the plug-side conductor end 5, and the tip is located on the outer periphery of the plug-side conductor end 5. Reference numeral 8 denotes a contact that allows current to flow between the socket-side conductor end 3 and the plug-side conductor end 5. The contact 8 is pressed by a leaf spring 10 on the outer periphery of the cylindrical housing 9, and a contact portion 8 a is formed on the inner surface of the distal end of the socket-side conductor end 3 and the plug-side conductor end 5.
8b. The housing 9 is fixed by bolts 14 to a ring-shaped adapter 12 fixed to the inside of the tip end of the plug-side conductor end 5 by bolts 13. As shown in FIG. 2, the contact 8 is fitted in a plurality of axial grooves 9 a provided on the outer periphery of the housing 9. 7
Is a retaining ring for preventing the contact 8 from coming off in the axial direction of the housing 9. The retaining ring 7 is connected to the housing 9
The metal tape is doubly wound around the groove 9b provided in the circumferential direction. Reference numeral 11 denotes a contact 8
A retaining ring for preventing the groove 9a from coming off in the outer diameter direction. The retaining ring 11 connects the contact 8 to the housing 9 before the contact 8 is inserted into the socket-side conductor end 3.
Has an inner diameter to be held in the groove 9a. 15,
Reference numerals 16 are guide rings attached to inner surfaces of both ends of the housing 9. Reference numeral 17 denotes a guide rod provided in the center of the inside of the socket-side conductor end 3 in the axial direction.

[0007] The conductor connecting portion of this embodiment is assembled as follows. That is, 1) First, the contact 8 is fitted into the groove 9a, and the housing 9 on which the retaining rings 7 and 11 are mounted.
Is attached to the plug-side conductor end 5. 2) Next, the guide rod 17 provided on the socket-side conductor end 3 is inserted into the guide rings 15 and 16, and the socket-side conductor end 3 and the plug-side conductor end 5 are aligned so as to be concentric. I do. Then, the contacts 8 arranged in a ring shape are positioned inside the socket-side conductor end 3, and the contact 8 pressed in the radial direction by the leaf spring 10 is pressed by the contact portion 8a to the inner surface of the socket-side conductor end 3. To make contact. In addition, the tip of the socket-side conductor end 3 is located on the outer periphery of the plug-side conductor end 5.

In the present embodiment, the outer diameters of the socket-side conductor end 3 and the plug-side end 5 are substantially equal to the outer diameters of the conductors 1 and 2, and the cut-off of the socket-side conductor end 3 and the plug-side end 5 are performed. Since the area is substantially equal to the cross-sectional area of the conductors 1 and 2, the current capacity at the connection portion does not decrease more than that of the conductors 1 and 2.
The tip of the plug-side conductor end 5 is inserted into the socket-side conductor end 3, and the socket-side conductor end 3 is
In addition, it covers the tip of the plug-side conductor end 5 and also has a shielding function.

[0009]

As described above, according to the present invention, there is an excellent effect that the current capacity is improved as compared with the prior art, the socket-side conductor end also has a shielding function, and the structure is simplified.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of one embodiment of a conductor connecting portion of a gas-insulated electric device according to the present invention.

FIG. 2 is a partial sectional view taken along line AA of FIG.

FIG. 3 is an explanatory view of a conductor connecting portion of a conventional gas-insulated electric device.

[Explanation of symbols]

 1, 2 conductor 3 socket-side conductor end 4, 6, 13, 14 bolt 5 plug-side conductor end 7, 11 retaining ring 8 contact 8a, 8b contact 9a, 9b groove 10 leaf spring 12 adapter 15, 16 guide Ring 17 Guide rod

Claims (1)

[Claims] In a conductor connection portion of a gas-insulated electrical device by a plug-in contact method in which a plurality of contacts are arranged between opposing socket-side conductor ends and plug-side conductor ends, a socket-side conductor end and a plug are provided. The side conductor end has a cylindrical shape, the contact contacts the inner surfaces of the socket-side conductor end and the plug-side conductor end, and the tip of the plug-side conductor end is inserted into the socket-side conductor end. A conductor connection portion of a gas-insulated electric device, characterized in that: