JPS6029823Y2 - Conductor connection device for pipeline aerial power transmission line - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a conductor connecting device for a conduit aerial power transmission line.

As is well known, conduit aerial power transmission lines that transmit large amounts of power generally have a structure in which a conductor made of aluminum, copper, etc. is supported by an insulator in a conduit filled with highly insulating gas such as SF6 gas. It will be done.

However, this conductor generates thermal stress depending on the outside temperature and current conditions, and expands and contracts in the axial direction.

Furthermore, after installation of the equipment, changes in the condition of the foundation such as ground subsidence may cause conduits and line conductors to become tilted (eccentricity).

Therefore, this type of conductor connection device must be able to conduct electricity without any trouble even if these situations occur.

For this purpose, the one shown in FIG. 1 has conventionally been used.

In the figure, 1 is a conduit, and 2 and 3 are line conductors arranged in the axial direction within the conduit 1, supported by an insulator (not shown), and having end faces facing each other.

Reference numeral 4 denotes current-carrying contacts that come into contact with the side surfaces of the conductors 2 and 3, and a plurality of contacts are provided so as to surround the end side surfaces of the conductors 2 and 3, and a ring spring 5 is arranged on the outside of these contacts. It is installed and barked to obtain contact pressure.

6 is a shield cover which covers the contactor 4 and whose base end is fixed to one line conductor 2 and whose tip end is open to the other line conductor 3 side; 7 is a contact fixing piece; It is fixed to the conductor 2 with bolts or the like.

8 is a highly insulating gas such as SF6 gas, and 9 is a pipe connector.

By the way, according to the above-mentioned configuration, even if the amount of expansion and contraction of the line conductor 2.3 increases due to temperature conditions, increase in conductor length, etc., the length of the contactor 4 and the shield cover 6 is increased. That's quite acceptable.

However, since the contact 4 is stopped by the fixed piece 7, even if the opening at the tip of the shield cover 6 is enlarged,
The inclination angle and eccentricity of the line conductor 2.3 due to poor ground quality can only be tolerated within a small range.

In view of the above points, the present invention aims to eliminate the above-mentioned disadvantages by attaching the shield cover to one of the conductors using a spherical bearing.

The present invention will be explained below based on the embodiment shown in FIG.

In the figure, 21 is a ball piece attached to one of the line conductors 2.

22 is a shield cover, and this base 22a has a spherical groove 2.
2b is provided and makes spherical contact with the ball piece 21 to form a spherical bearing.

The shield cover 22 is formed by assembling the divided pieces of the base portion 22a, body portion 22c, and tip portion 22d to have a smooth outer surface, which prevents contact with the ball piece 21 and the line conductor 2 of the contactor 4.
Easy to install.

Furthermore, the base 22a of the shield cover 22 is divided into a plurality of parts in the axial direction and fitted with the ball piece 21, and the cylindrical body 22c is placed on the base 22a, and the base 22a is tightened to the body 22c. Contact with the ball piece 21 can be made easily.

23 and 24 are contact retaining rings.

Otherwise, the same reference numerals as in FIG. 1 indicate the same parts.

In the above configuration, even if the line conductors 2 and 3 undergo a large amount of expansion and contraction in the axial direction due to temperature conditions, etc., the contact 4 is always in contact with both line conductors 2 and 3 and cannot be separated. There isn't.

In addition, the line conductors 2 and 3 may be tilted wide and their center lines become C2 and C3□, or the line conductors 2 and 3 are wide eccentric and their center lines become C2 and C3. Even if it becomes like that,
Since there are no obstructions, the contact 4 can be easily connected to the line conductor 2.
, 3, and since the shield cover 22 is in spherical contact with one conductor 2 at its base 21a, it can move freely and can follow the movement of the other line conductor 3.

Although the explanation has been omitted here, it goes without saying that metal bellows or other metal bellows are inserted at key points in the conduit 1 to cope with the aforementioned expansion/contraction, inclination, and eccentricity. It is.

As detailed above, in accordance with the present proposal, a large amount of expansion and contraction in the axial direction of the line conductors, a large width inclination of the line conductors,
This has the effect of providing a device that can cope with large width eccentricity without any trouble.

In addition, if a groove is provided at the tip of the shield cover and a heat-resistant shrink ring made of Teflon or the like is inserted into the groove and welded around the line conductor, the contact area will shrink due to the expansion and contraction of the line conductor. Even if powder is generated, the metal powder can be localized within the shield cover and prevented from scattering into the pipe, thereby preventing deterioration of insulation properties.

As shown in FIG. 3, when a heat-resistant piston ring or O-ring 23 is inserted into the tip 22d of the shield cover 22, the shield cover 22 is prevented from automatically sagging and the conductors 2, 3 are It can follow eccentricity and prevent metal powder from scattering.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing a conventional device, FIG. 2 is a vertical cross-sectional view showing one embodiment of the present invention, and FIG. 3 is a vertical cross-sectional view of essential parts showing another embodiment of the present invention. 1... Conduit, 2, 3... Line conductor,
4...Contactor, Death...Highly insulating gas, 2
1...Ball piece, 22-...◆・Shield cover.

Claims (1)

[Claims for Utility Model Registration] Two line conductors arranged axially in a conduit filled with highly insulating gas, with end faces facing each other with a gap in between; A sliding contact for energization that contacts the side surface of the conductor, a tip, a body, and a base, the outer surfaces of which are formed continuously and gently, and the body makes contact with the sliding contact. A conduit for an aerial power transmission line, characterized in that the shield cover has a spherical groove provided on the base and a spherical groove provided on one of the line conductors engages with the shield cover to effect spherical contact. Conductor connection device.