JPH076649Y2 - Gas insulated switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a gas-insulated switchgear having an improved connection portion between adjacent devices.

(Prior Art) In recent years, in substations and switchyards in and around large cities, electrical equipment such as circuit breakers, transformers, current transformers, and disconnectors are stored in tanks filled with insulating gas, and The gas-insulated switchgear is widely used because it has a three-dimensional layout, and the site area is greatly reduced and the reliability is improved. In such a gas-insulated switchgear, not only the reliability of the device but also the cost of the site and the like are required to further reduce the size of the device.

The devices constituting such a gas-insulated switchgear are connected by a connecting portion that is electrically opened and closed by sliding. That is, as shown in FIG. 9, a rod-shaped conductor 3 is fixed as an auxiliary conductor at a substantially central portion of the insulator 2 fixed to the adjacent device 1. In addition, the main conductor 4 has two L
A cylindrical conductor 5 having at least one end
It consists of Then, the rod-shaped conductor 3 and the cylindrical conductor 5 are slidably connected to each other to electrically connect to each other.
have.

An example of the structure of the connecting portion 6 is shown in FIG. That is, the energizing element 8 whose contact pressure is held in the circumferential direction by the spring 7 is mounted inside the tubular conductor 5, and the rod-shaped conductor 3 is slidably inserted therein. Therefore, the main conductor 4 can easily move in the axial direction of the rod-shaped conductor 3.

As a result, the main conductor 4 moves to the side of the non-rod-shaped conductor due to the electromagnetic force caused by a large current for a short time generated at the time of a ground fault, so that the main conductor 4 is fixed to the container 9 as shown in FIG. It is supported and fixed by the supported insulating material 10.

(Problems to be solved by the invention) However, in the conventional gas-insulated switchgear having the above-described configuration, the main conductor 4 does not move in the axial direction due to the electromagnetic force due to a large current for a short time that occurs during a ground fault. As such, it is necessary to provide a supporting insulator. Therefore, there is a drawback in that a mounting bracket for mounting the supporting insulator 10 inside the container 9 is required, the number of members increases, and the mounting process increases.

Further, in order to satisfy the insulation performance peculiar to each device, a sufficient creepage distance of the insulator is required, and the inner diameter of the container 9 becomes large.

As described above, since the supporting insulator and the mounting bracket are required, the cost is increased, and the inner diameter of the device is increased, so that the entire gas-insulated switchgear is increased in size.

The present invention has been proposed in order to eliminate the above drawbacks, and an object thereof is to provide a gas-insulated switchgear that can be reduced in cost and downsized by improving the connection portion of an adjacent device. To do.

[Structure of the Invention] (Means for Solving the Problem) In the present invention, an auxiliary conductor is fixed to an insulating support attached to a connecting portion of an adjacent container, and the main conductor is arranged in the axial direction of the auxiliary conductor. It is electrically connected through a current-carrying element by sliding, and either one of its auxiliary conductor or main conductor is composed of a tubular or rod-shaped conductor,
In a gas-insulated switchgear in which the energizing element is arranged inside the tubular conductor, at least one protrusion is provided at a deeper portion than the energizing element so as to project toward the center of the tubular conductor. Further, a fitting groove into which the protrusion is fitted is provided at the tip of the auxiliary conductor.

(Operation) According to the gas-insulated switchgear of the present invention, the movement of the main conductor in the axial direction is restricted, so that the main conductor is moved in the axial direction by the electromagnetic force caused by a large current for a short time during a ground fault. This can be prevented, and the supporting insulating material that supports and fixes the main conductor to the container can be eliminated.

(Embodiment) An embodiment of the present invention will be specifically described below with reference to FIGS. 1 to 3. The same members as those of the conventional type shown in FIGS. 9 and 10 are designated by the same reference numerals, and the description thereof will be omitted.

* Structure of Embodiment * In this embodiment, as shown in FIG. 1 and FIG.
The energizing element 8 is provided on the inner wall of the tip portion of the cylindrical conductor 12 which is the main conductor.
Is attached by a spring 7, and a protrusion 15 projecting inward is provided in the inner portion thereof, while a protrusion 15 is fitted near the tip of the rod-shaped conductor 11 which is an auxiliary conductor. groove
16 are formed.

It should be noted that between the fitting groove 16 and the protrusion 15, G ₁ and G ₂ are respectively provided in the front and rear in the axial direction, and G ₃ is provided in the direction orthogonal to the axis.
The gap is provided.

* Operation of Embodiment * In the gas-insulated switchgear of this embodiment having such a configuration, when connecting adjacent devices, the rod-shaped conductor 11 is inserted into the tubular conductor 12 and the tip of the rod-shaped conductor 11 is inserted. The projection 15 provided on the inner wall of the tubular conductor 12 is fitted into the fitting groove 16 formed near the portion.

As a result, the rod-shaped conductor 11 includes the main conductor 13 having the tubular conductor 12.
Position regulation can be performed. Then, even when a force pulling the main conductor 13 on the side opposite to the rod-shaped conductor (in the direction of separating the two) acts on the main conductor 13 due to the electromagnetic force due to the short-time large current generated at the time of the ground fault, the main conductor 13 is It can be prevented from coming off from the rod-shaped conductor 11.

In addition, since the supporting insulator and the fitting for fixing the main conductor to the container, which are conventionally required, are not required, the inner diameter L of the device can be reduced as shown in FIG. The size of the gas insulated switchgear can be reduced.

* Other Embodiments * Note that the present invention is not limited to the above-described embodiments, and two protrusions provided in the inner back portion of the cylindrical conductor are provided at positions facing each other, and Two fitting grooves into which the protrusions fit may be provided at corresponding positions. As a result, the joint between the two becomes stronger, and not only the axial direction but also the position regulation in the direction orthogonal to the axis is performed.

Further, as shown in FIG. 4, the protrusion 25 provided in the inner portion of the tubular conductor 22 is composed of a detachable bolt pin 26,
It is configured so that it can be attached from the outside of the cylinder conductor 22. On the other hand, a stopper 28 provided with a fitting groove 27 into which the protrusion 25 is fitted is fixed to the tip of the rod-shaped conductor 21 by a bolt 29. In this case, since the shape of the tip of the rod-shaped conductor 21 is standardized, the manufacturing process can be simplified.
After inserting the main conductor 23 into the rod-shaped conductor 21, the protrusion 25
Since it is possible to install the bolt pin 26 that constitutes
The tip of the rod-shaped conductor 21 will not hit the protrusion 25 and be damaged during insertion. Further, the fitting groove formed in the stopper 28 may have a hole shape.

Further, as shown in FIGS. 5 and 6, a slit 30 is provided at the tip of the stopper 28 through which the tip of the bolt pin 26 attached to the main conductor can pass. In this case, since the main conductor 23 can be inserted into the rod-shaped conductor 21 after the bolt pin 26 is fixed to the cylindrical conductor 22, the tip of the protrusion 25 and the fitting groove can be inserted.
Positioning with 27 becomes easy.

Further, FIG. 7 is a view for preventing the fall by supporting the main conductor by the upper device when the adjacent devices are vertically arranged.

The present invention can be applied not only to a single-phase type, but also to devices in which a three-phase conductor is stored in one tank.

FIG. 8 shows an embodiment in which the present invention is applied to a circuit breaker used in a feeder line in a double bus system switchgear and which houses a branch point of a main bus.

That is, the vertically arranged circuit breaker 31 includes adjacent devices (for example, the busbar A side disconnector 1a in the upper part and the busbar B side disconnector 1 in the lower part).
b, and the line side device 1c in the opposite direction of the disconnectors 1a, 1b)
And conductors (main conductors) 32a, 32b, 32c.
Further, the arc extinguishing chamber 33 of each phase is installed upright, and the common conductor 36 having the main bus branch point 35 for fixing the conductors 32a and 32b to the lower end portion 34 by bolts or the like is a bolt. It is fixed by etc.

On the other hand, on the upper end portion 37 of the arc extinguishing chamber 33, a connecting conductor 38 for fixing the conductor 32c to the conductor 32c with bolts or the like is fixed.

The connecting portion 34 of the present invention is incorporated into the electrical connection between the busbar A side disconnector 1a and the conductor 32a. Where the common conductor
The movement of the electromagnetic force of 36 is restrained in the front-back direction and the rotating direction of FIG. 8 because it is fixed at the lower end portion 34, and the axial direction of the conductor 32a is restrained by the connecting portion 39 of the present invention. ing.

[Advantage of the Invention] As described above, according to the present invention, by providing the stopper structure at the connecting portion between the adjacent devices, the size of the container can be minimized, and the supporting insulator of the main conductor is unnecessary. Therefore, it is possible to reduce the size and cost of the gas-insulated switchgear.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the structure of the connecting portion of the gas insulated switchgear of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a gas insulated switchgear of the present invention. 4 is a side sectional view of the present invention, FIG. 4 is a sectional view showing another embodiment of the present invention, FIG. 6 is a sectional view taken along the line BB of FIG. 5, and FIGS. FIG. 9 is a side sectional view showing another embodiment, FIG. 9 is a sectional view showing a conventional gas-insulated switchgear, and FIG. 10 is a sectional view showing a connecting portion of the conventional gas-insulated switchgear. 1 ... Adjacent device, 2 ... Insulator, 3 ... Rod-shaped conductor, 4 ...
... main conductor, 5 ... cylindrical conductor, 6 ... connection part, 7 ... spring, 8 ... energizing element, 9 ... container, 10 ... supporting insulator,
11 …… Rod-shaped conductor, 12 …… Cylindrical conductor, 13 …… Main conductor, 14…
… Connection part, 15 …… Projection part, 16 …… Fitting groove, 21 …… Rod conductor, 22 …… Cylindrical conductor, 23 …… Main conductor, 25 …… Projection part, 26
...... Bolt pin, 27 …… Mating groove, 28 …… Stopper, 29
...... Bolts, 30 ...... Slits, 31 ...... Circuit breakers, 32 ...... Main conductor, 33 ...... Arcing chamber, 34 ...... Lower end part, 35 ...... Main bus branch point, 36 ...... Common conductor, 37 ... ... upper end, 38 ... connecting conductor,
39 …… Connection part.

Claims (1)

[Scope of utility model registration request] 1. An auxiliary conductor is fixed to an insulating support attached to a connecting portion of an adjacent container, and the main conductor is slid in the axial direction of the auxiliary conductor to be electrically connected via a current-carrying element. In the gas-insulated switchgear in which any one of the auxiliary conductor and the main conductor is composed of a tubular or rod-shaped conductor, and the energizing element is disposed inside the tubular conductor, At least one protrusion is provided in the inner part so as to protrude toward the center of the tubular conductor, while a fitting groove into which the protrusion is fitted is provided at the tip of the auxiliary conductor. A gas insulated switchgear characterized by the above.