JPS6015377Y2 - Conduit conduit for conductor connections - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a conduit conduit for a conductor connection, and more specifically, a connection for connecting conductors between pre-installed electrical devices such as vacuum breakers, lightning arresters, or transformers. The present invention relates to a conductor, a connecting conductor that connects a conductor of an electric device and a conductor in a wire conduit, or a wire conduit that covers a connecting conductor that connects conductors between wire conduits.

Conventionally, a connecting conductor 5 that connects a conductor 2 of an electrical device 1 that is fixed in a predetermined position such as a vacuum breaker, a lightning arrester, or a transformer and a conductor 4 of an electric conduit 3 is,
As shown in FIG. 1, a connecting conduit 7 is provided with opposing hand holes 6.6 used when connecting both ends of the connecting conductor 5 to the electrical equipment 1 or the conductors 2, 4 of the conduit 3, and is constituted by a metal bellows 8 formed into a corrugated shape to absorb and alleviate the gap between the electrical equipment 1 and the electric wire conduit 3 due to errors, or to absorb the expansion and contraction due to heat of the connecting conduit 3, etc. It is generally covered by a conduit conduit.

However, when connecting or disconnecting the connecting conductor 5 to the conductor 2 of the electrical equipment 1 and the conductor 4 of the conduit 3, one worker must grope through the hand hole 6, which is a limited space. This not only makes the work difficult, but also requires a great deal of effort and time.
In particular, there were problems such as not being able to confirm the connection work.

In addition, since it is essential to provide a hand hole 6 in the connecting conduit 7, the wire conduit at the conductor connection part must be made longer by the length of the hand hole 6, which increases the installation area for electrical equipment, etc. It was also a contributing factor.

Furthermore, since there are many joints such as the joint between the connecting conduit 7 and the metal bellows 8 or the joint between the hand hole 6 and the cap covering the hand hole 6, oil or gas stored in the electric wire conduit There was a risk of leakage.

The present invention has been developed in view of the above-mentioned problems, and it is necessary to check the condition of the connecting conductor that connects the conductor between the electrical equipment installed in advance or the conductor between the electrical equipment and the electric conduit, etc. The purpose of this invention is to provide a conduit conduit for a conductor connection part that can be easily used, reduce the spacing between connecting conductors, and have excellent oil and airtightness. One embodiment of this invention will be described in detail.

FIG. 2 shows a conductor conduit 9 of a conductor connection part according to the present invention, with a conductor 11 of an electrical device 10 installed and fixed in advance, such as a circuit breaker, lightning arrester, or transformer, facing This exemplifies the case where the conductor 13 of the electric wire conduit 12 fixed in advance at a separated position is used as a conductor connection part that connects the conductor 13 of the electric wire conduit 12 via the connection conductor 14.
is held to the electrical equipment 10 and the wire conduit 12 via an insulating spacer 15 that also serves as a partition wall, and the connecting conductor 14 is attached to each conductor 11.13 with a fastener such as a bolt (not shown). It is something.

Thus, the electric wire conduit 9 includes a welded bellows 16 having a high expansion/contraction ratio and a connecting flange 17 that is integrally attached to both ends of the bellows 16 and can be freely connected to the electrical equipment 10 or the electric wire conduit 9. The jacket is made up of .17.

Each connection flange 17 is provided with an end portion of the bellows 16 even when the bellows 16 is slightly extended beyond its natural length.
Shield cylinders 18 and 19 of different diameters, each having an appropriately smaller diameter than the inner diameter of the bellows 16 and approximately half the natural length of the bellows 16, are fixed concentrically through the base of the bellows 16 in order to polymerize within the bellows 16. There is.

Each of the shield tubes 18 and 19 has the chevron-shaped bellows 1.
This is to prevent the generation of corona from the acute-angled portion in the bellows 16 and to alleviate the electric field in the bellows 16. At the tip of one of the small-diameter shield tubes 18, as shown in FIG. A bent portion 20 is formed to be curved outward to prevent corona from occurring, and the bellows 16 is stretched more than necessary at the tip of the other large-diameter shield tube 19. In order to prevent damage, a bent portion 21 is formed which is curved inward to engage with the bent portion 20.

With the above configuration, each conductor 14 can be
1.13 and cover it with the electric wire conduit 9 according to the present invention, first the connecting conductor 14 is housed in the shield tube 18.19, and the electric wire conduit 9 consisting of the bellows 16 etc. is attached to the opposite conductor 11.13. I'll bring it to you.

Next, as shown in FIG.
6 is pressed against the temporarily fixed connecting flange 17 and locked using an appropriate locking member.

At this time, the shield 818.1 of different diameter inside the bellows 16
9, since the small-diameter shield cylinder 18 is housed in the large-diameter shield cylinder 19, there is no problem in compressing the bellows 16.

Then, one end of the connecting conductor 14 is connected to the conductor 11 of the electrical equipment 10.
It is attached to the end using a fastener (not shown).

Note that during this installation, the electrical conduit 9 consisting of the bellows 16 etc. is compressed to the other end of the connecting conductor 14, so that the installation can be done easily and the installation can be done without changing the condition. Confirmation can be performed accurately.

Next, while releasing the compressed state of the bellows 16,
Stretch the bellows 16 and attach the other connecting flange 17 to the electrical equipment 10 as appropriate, and then
At the same time, the bellows 16 is compressed to the other flange 17 side and locked appropriately.

Then, the other end of the connecting conductor 14 is connected to the conductor 13 of the electric wire conduit 12.
When the bellows 16 is stretched and one connecting flange 17 is attached to the conduit 12, the connecting conductor 1
4 and the installation of the electrical conduit 9 according to the present invention covering it is completed.

In addition, in the above description, the case where the connection conductor 14 was attached from the electrical equipment 10 side was detailed, but of course it can also be attached from the electric wire conduit 12 side.
When removing the connecting conductor 14, the procedure described above is reversed.

As described above, the present invention provides connecting flanges that are integrally attached to both ends of a welded bellows and can be freely connected to an electrical device or a conduit, and the bellows is extended slightly from its natural length to each of the connecting flanges. The bases of shield tubes of different diameters having a length of about half the natural length of the bellows are fixed concentrically so that the ends of the shield tubes 18 overlap within the bellows even when the end portions of the shield tubes 18 of small diameter The bellows is provided with a bent part bent outward in a radiused shape, and a bent part bent inward in a radiused shape is provided at the end of the large diameter shield cylinder, so that the bellows can be compressed and bent to one side. By bringing the connecting conductors together, it is possible to extremely easily attach and detach connecting conductors at conductor connecting portions between electrical devices that have been installed in advance, and moreover, it is possible to accurately confirm the installation state.

Furthermore, unlike conventional electric wire conduits, hand holes are not required, so the length of the conduit can be reduced, and the installation area for electrical equipment and the like can be reduced.

Furthermore, since the only connection points are the connection flanges at both ends, leakage of oil, gas, etc. contained in the electrical conduit can be reduced.

In addition, shield tubes with different diameters whose bases are fixed to the respective connection flanges and are slightly longer than half the natural length of the bellows are arranged concentrically inside the bellows, and the outer shield tubes are attached to the ends of the inner and outer shield tubes. The bent portions and locking portions are curved inwards and outwards to alleviate the electric field within the conduit, and prevent the bellows from being excessively stretched when attached to or removed from electrical equipment, etc. The bellows does not sag or sag, and has the effect of preventing damage to the bellows.

In addition, in the above-mentioned embodiment, the case where the electric wire conduit according to the present invention is used in the conductor connection part between the electric equipment and the electric wire conduit is described in detail, but the present invention is not limited to this example. It is obvious that it can be used for conductor connections between each other or between electric conduit lines.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a cross-sectional explanatory diagram of a conventional electrical conduit conduit at a conductor connection part, and Fig. 2 shows a conduit conduit according to the present invention between an electrical equipment and an existing conduit. FIG. 3 is an enlarged cross-sectional view of the main part, and FIG. 4 is a cross-sectional explanatory view showing the installation state of the electric wire conduit according to the present invention. 10... Electrical equipment, 12... Electric cable conduit, 16... Bellows, 17... Connection flange, 18.19... Shield Tube, 20.2
1. Bend/bent part.

Claims (1)

[Scope of utility model registration request] Connecting flanges 17 that can be freely connected to the electrical equipment 10 or the electric conduit 12 are integrally attached to both ends of the welded bellows 16, and the bellows 16 is slightly extended from its natural length to each of the connecting flanges 17. The shield tubes 18, 1 have different diameters and have a length approximately half of the natural length of the bellows 16 so that the end portions overlap within the bellows 16 even when
9 is fixed concentrically to the end of the small-diameter shield cylinder 18, and is bent outward in a curved shape.
0, and a bent portion 21 bent inwardly into a radius shape at the end of a large-diameter shield tube 19.