JPH07163023A - Collector ring for gas insulated switchgear - Google Patents

Abstract

PURPOSE:To resist a collector ring against external force by fixing a male side contact with a spherical contact surface at a specified position in a cylindrical female side contact by an insulator. CONSTITUTION:A quasi-cylindrical female contact 3 having a band 5 for collecting currents on an internal surface is mounted at the end section of a conductor 1, and a male side contact 4 with a spherical contact surface is installed at the end section of a conductor 2. The female side contact 3 and the male side contact 4 are connected electrically through the band 5 for collecting currents, and the spherical section of the male side contact 4 is fixed at the specified position of the inside of the female side contact 3 by insulators 6, 7 and a C-type retaining ring 8. The external surface of the female side contact 3 also functions as the shield of the relaxation of an electric field. Accordingly, a collector ring can resist large external force.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a conductor of a gas insulated switchgear.

[0002]

2. Description of the Related Art Normally, the conductors used in the components and buses of gas-insulated switchgear absorb misalignment and dimensional errors between devices so that the effects of thermal stress and vibration do not affect other devices. To do this, tulip contacts are provided at appropriate locations. However, although the tulip contact can deal with a considerably large displacement in the axial direction of the conductor, it cannot deal with a displacement in the direction perpendicular to the axial direction of the conductor or a displacement in the bending direction around the connecting portion. However, considering the influence of uneven settlement after installation, when there is a bellows between the equipment and the busbar, the conductor must have a structure that absorbs the same displacement as the bellows. It was difficult for Tulip Contact to deal with this. Also, due to the downsizing and high performance of gas-insulated switchgear in recent years, the shape of each device and busbar that make up the gas-insulated switchgear has become complicated, and the structure of the conductor that absorbs dimensional errors and misalignment of the device has become Is desired.

[0003]

As a solution to the above problems, a method of using a twisted conductor as shown in Japanese Utility Model Publication No. 4-38475, or a method of using a twisted wire as disclosed in Japanese Patent Publication No. 63-33367. There is a method of combining the contact and the spherical contactor. FIG. 6 shows an example in which a conductor stranded wire is used, and conductors 1 and 2 facing each other are connected by a conductor stranded wire 13 having flexibility. FIG. 7 shows an example in which a spherical contactor is used, in which the spherical contactor 14 provided at the end of the conductor 2 has a contactor composed of a plurality of contactor pieces 15 and a helical spring 16. Connected to conductor 1. However, in the case of the structure of FIGS.
The conductors are not mechanically and firmly connected,
When an unreasonable force is applied to the connecting portion by electromagnetic force or the like, there is a possibility that a defect such as poor contact may occur. In addition, FIG.
In the case of the structure shown in FIG. 7, the contact 17 and the shield 17 having a different structure are required to alleviate the electric field at the connecting portion, which complicates the structure of the connecting portion, and the connecting portion itself when an accident or a defect occurs. The structure is difficult to remove.

An object of the present invention is to provide a strong large displacement absorbable current collector which can be easily attached and detached and can support a large force.

[0005]

In order to achieve the above object, the present invention provides a male-side contact having a spherical contact surface at one end of a conductor facing each other, and a semi-cylindrical contact at the other end, and the inside thereof. A female contact is provided to engage with the male contact via a current collecting band provided on the male contact so that the male contact does not change in contact state due to external force. Lock in place. Further, the outer surface of the female side contact also serves as a shield for relaxing the electric field. Furthermore, in order to facilitate mounting and dismounting, either one of the female-side contactor and the male-side contactor is connected to one end of the opposing conductor through a play hole that is adjustable in a direction perpendicular to the conductor axial direction. The other end is bolted to one end of the opposing conductor through an adjustable play hole in the same direction as the conductor.

[0006]

By fixing the male contactor having a spherical contact surface at a predetermined position inside the cylindrical female contactor with an insulator, the current collector can withstand a large external force.
Further, since the outer surface of the cylindrical female contact also serves as a shield, a shield having a separate structure is not required and the structure is simplified. Also, one of the male and female contacts is bolted to the end of the conductor through play holes that are adjustable in the direction parallel to the conductor direction and the other in the vertical direction. It will be easier.

[0007]

FIG. 1 shows an embodiment of the present invention. A female side contactor 3 having a semi-cylindrical shape and a current collecting band 5 on its inner surface is provided at the end of the conductor 1, and a male side contactor having a spherical contact surface at the end of the conductor 2. 4 are provided. The female-side contactor 3 and the male-side contactor 4 are electrically connected to each other via a current-collecting band 5, and the spherical portion of the male-side contactor 4 is the female-side contactor 3.
It is fixed to predetermined positions inside by insulators 6 and 7 and a C-shaped retaining ring 8. With this structure, the conductors 1 and 2 are bent in all directions around the spherical portion of the male contactor 4,
Also, it can respond to rotation around the conductor center axis. Further, by fixing the spherical portion of the male-side contactor 4 with the insulators 6 and 7 and the C-shaped retaining ring 8, the connecting portion becomes strong and can withstand a large external force. Further, the insulator 7 also has an effect of enclosing the metallic foreign matter generated by the sliding of the current collecting band 5 and the male side contactor 4 inside the female side contactor 3. Also,
The outer surface of the female contactor 3 also serves as a shield for alleviating an electric field, and it is not necessary to provide a shield having another structure. Further, the female contactor 3 is connected to the conductor 1 with a bolt 10 through a play hole 9 which is adjustable in a direction perpendicular to the conductor axial direction as shown in FIG. 3 which is a BB view of FIG. The male contact 4 is connected to the conductor 2 with a bolt 12 through a play hole 11 that is adjustable in a direction parallel to the conductor axial direction. Thus, even if the conductors 1 and 2 are fixed, they can be easily attached and detached. FIG. 2 is a view taken along line AA of FIG.

FIG. 4 shows another embodiment of the present invention. The difference from the embodiment of FIG. 1 is that a current collecting band 5b is provided on the outer side of the first female contact 3a which is fitted to the male contact 4.
The second female side contactor 3b having the inner surface thereof is provided, and the first female side conductor 3a and the second female side contactor 3b are slidable in the axial direction. This structure allows
In addition to bending around the spherical portion of the male contactor 4 and rotation around the conductor central axis, the conductors 1 and 2 can be expanded and contracted in the conductor axial direction. Since the conductor can be expanded and contracted in the axial direction, the play hole adjustable in the direction perpendicular to the axial direction and the play hole adjustable in the direction parallel to the axial direction as in the embodiment of FIG. Can be easily installed and removed without combining.

FIG. 5 shows an embodiment of the present invention, which is a combination of the embodiment of FIG. 1 and the embodiment of FIG. Male contact 4 mating with first female contact 3a on the left side of the drawing
And the male contactor 4 to be mated with the female contactor 3c on the right side of the drawing is integrated. With this structure, the conductors 1 and 2 are
In addition to bending, rotation, expansion and contraction, it is possible to deal with displacement of the conductors 1 and 2 in the direction of core misalignment.

[0010]

According to the present invention, a male contact having a spherical contact surface is fixed to the inside of a quasi-cylindrical female contact having a collecting band inside by using an insulator. By doing so, it is possible to withstand a large external force and obtain a current collector that does not require a shield of another structure. Also, connect one of the male and female contacts to the conductor end through a play hole that can be adjusted in the direction perpendicular to the conductor axis, and adjust the other parallel to the conductor axis. The current collector can be easily attached and detached by connecting it to the other conductor end via a possible play hole.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an AA view of FIG.

FIG. 3 is a BB view of FIG.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a sectional view showing a second embodiment of the present invention, which is a combination of the embodiments of FIGS.

FIG. 6 is a sectional view showing a conventional example.

FIG. 7 is a sectional view showing a conventional example.

[Explanation of symbols]

1, 2 ... Conductor, 3 ... Female contact, 4 ... Male contact, 5 ...
Current collecting band, 6, 7 ... Insulator, 8 ... C type retaining ring, 11
… Play holes that can be adjusted parallel to the conductor axis, 12…
bolt.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahira Wachi 1-1-1 Kokubuncho, Hitachi City, Ibaraki Prefecture Hitachi Co., Ltd. Kokubun Plant

Claims (4)

[Claims] 1. A current collector for use in a gas-insulated switchgear, comprising a male-side contact having a spherical contact surface at one end of a conductor facing each other, and a semi-cylindrical contact at the other end provided on the inner surface thereof. A collector for a gas-insulated switchgear, comprising a female-side contact that engages with the male-side contact via the current collecting band. 2. The end portions of the conductors facing each other through a play hole in which one of the male-side contactor and the female-side contactor is adjustable in a direction perpendicular to a generatrix direction. Gas connected to the other ends of the conductors facing each other through play holes adjustable in the direction parallel to the generatrix direction. Collector for insulated switchgear. 3. The female-side contact according to claim 1, wherein the female-side contactor has a cylindrical outer shape, and has a quasi-cylindrical outer shape, and a current-collecting band provided on the inner surface of the female-side contactor. A collector for a gas-insulated switchgear having another female side contact connected to one end of the opposing conductor. 4. The current collector for a gas insulated switchgear according to claim 1, 2 or 3, wherein two or more pairs of current collectors, each of which includes a female side and a male side, are connected in series.