JPH118154A - Capacitor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a capacitor device from deteriorating in insulating characteristic to the earth due to the movement of capacitor elements from the correct position when the capacitor elements disposed in an array are bound together with assembling bands and assembling plates into the capacitor device. SOLUTION: First cutouts 11 and 13 are provided to the one side edges 3A and 4A of assembling plates 3 and 4 respectively, and second cutouts 12 and 14 are provided to the other side edges 3B and 4B at a position different in level from that of the first cutouts 11 and 13. The first assembling band 5 out of assembling bands 5 and 6 is wound on capacitor elements 1 passing through the first cutouts 11 and 13, and the second assembling band 6 is wound of the capacitor elements passing through the second cutouts 12 and 14. Even if the capacitor elements 1 move to get out of position, the first assembling band 5 bears against the one side edge faces of the capacitor elements 1, and the second assembling band 6 bears against the other side edge faces of the capacitor elements 1. Therefor, the capacitor elements hardly move beyond the assembling bands.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a capacitor device.

[0002]

2. Description of the Related Art In a capacitor device, a plurality of flat capacitor elements are juxtaposed, and an assembly plate is abutted on both sides of the capacitor juxtaposed body. A configuration in which an aggregate is formed and stored and sealed in a tank together with insulating oil or insulating gas is already well known.

FIG. 4 shows a conventional example, in which 1 is a flat capacitor element. For example, a pair of electrode foils and a dielectric material sandwiched therebetween are wound into a cylindrical shape, and then formed into a flat shape. It is composed. In some cases, a metal-deposited dielectric may be used instead of the electrode foil and the dielectric. The plurality of capacitor elements 1 are arranged side by side as shown in the figure, and a capacitor juxtaposition body 2 is configured. Insulating collecting plates 3 and 4 are in contact with both sides of the capacitor juxtaposition body 2. The assembly plates 3 and 4 are, for example, a press board plate, a plastic plate, a reinforced plastic plate,
A bakelite plate or the like is used.

The capacitor juxtaposition body 2 and the assembly plates 3 and 4 abutting on the capacitor juxtaposition body 2 are arranged at different places along the height direction of the capacitor element 1 (two places in the example of FIG. 1). In the above, they are tightened and integrated by the insulating collective bands 5 and 6. Thus, the capacitor assembly 7 is configured. For the collective bands 5 and 6, for example, a heat-fusible plastic tape is used. Thereafter, the capacitor assembly 7 is stored and sealed in a tank together with insulating oil or gas as described later (FIG. 3).
reference). Thus, the capacitor device is completed.

By the way, in the capacitor assembly 7 having such a configuration, when it is stored in the tank as described above, the side end faces 1A and 1B of the capacitor element 1 are connected to the tank in order to avoid deterioration of the ground insulation characteristics. It is important that a sufficient insulation gap is maintained between the side walls of the substrate. For this purpose, the width of the collecting plates 3 and 4 is made wider than the width of the capacitor element 1. As a result, each side end face 1A of the capacitor element 1,
A predetermined distance occurs between 1B and the collective bands 5 and 6.

In this way, even if the capacitor assembly 7 moves in the tank in the width direction of the assembly plate (the direction of the arrow P in FIG. 4), the side ends of the assembly plates 3 and 4 can be moved. The positions of the edges 3A and 4A are regulated on the wall surface of the tank. Thereby, the side end surfaces 1A and 1B of the capacitor element 1 are prevented from approaching the wall surface of the tank without permission.

However, as a practical problem, there is a case where the capacitor elements 1 are assembled in a state of being shifted in the width direction due to a variation in work in manufacturing the capacitor assembly 7. In addition, the capacitor element 1 may be similarly displaced due to vibration in the process of transporting or transporting the completed capacitor device. FIG. 5 is a plan view showing a state in which such a shift has occurred.

When such a shift occurs, the side end surfaces 1A and 1B of the capacitor element 1 hit the collective bands 5 and 6 and move to exceed the side edges 3A and 4A of the collective plates 3 and 4. Even if not, if such a shift occurs, the side end surfaces 1A and 1B of the capacitor element 1 will approach the wall surface of the tank. If such a state occurs, the insulation properties to the ground of the capacitor element are reduced, and the reliability is reduced.

[0009]

SUMMARY OF THE INVENTION According to the present invention, when a plurality of capacitor elements are juxtaposed, an assembly plate is abutted on both sides of a capacitor juxtaposed body and tightened by an assembly band to form a capacitor assembly. It is an object of the present invention to prevent the ground insulation characteristics from being degraded due to the displacement of a capacitor element.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a first cutout is provided at one side edge of each assembly plate constituting a capacitor assembly, and a first notch is provided at each other side edge. A second notch having a height different from that of the notch is provided, and among the first and second collective bands that tighten the capacitor juxtaposed body and the aggregate, the first collective band is the first collective band. It is characterized in that the second band passes through the inside of the notch and the inside of the second notch.

If the capacitor juxtaposed body and the collecting plate are tightened by the first and second collecting bands passing through the insides of the respective notches, even if the capacitor element tries to shift in the width direction, Each side end face of the capacitor element corresponds to the first or second collective band in the direction in which it is about to move. This acts as a stopper and does not move beyond each collective band. Thus, each side end face of the capacitor element does not approach the side edge of each assembly plate. That is, even if the capacitor element shifts, the distance between the side end face of the capacitor element and the side edge of the assembly plate is maintained by the distance corresponding to the depth of each notch. .

[0012]

1 to 3 show an embodiment of the present invention.
It will be explained by. In addition, the part attached with the same code | symbol as the code | symbol attached to each figure after FIG. 4 shows the same or corresponding part. A plurality of capacitor elements 1 are arranged side by side to form a capacitor juxtaposed body 2, and a collecting plate 3, 4 is abutted on both sides thereof and then tightened by first and second collecting bands 5, 6 to form a capacitor assembly 2 7 is not particularly different from the conventional configuration.

According to the present invention, the first notch 11 is provided on one side edge 3A of one of the assembly plates 3, and the other side edge 3A is provided.
In B, a second notch 12 is formed at a different height from the notch 11. Similarly, the first notch 13 is provided on one side edge 4A of the other assembly plate 4, and the first notch 13 is provided on the other side edge 4B.
The second notch 14 is formed at a different height from the notch 13. The first notches 11, 13 and the second notches 12, 14 have the same height. The depth of each of these cutouts is set according to the required ground insulation characteristics.

The collective bands 5 and 6 are surrounded by the capacitor juxtaposed body 2 and the collective plates 3 and 4 to tighten the capacitor element 1 and the collective plates 3 and 4. From the bottom, the side edges 3B, 4 of the collecting plates 3, 4
B, and the collective band 6 is the collective plate 3,
4 is wound from the side edges 3A, 4A to the bottoms of the cutouts 14, 12. FIG. 2 schematically shows this winding state in a plan view. In the figure, one set band 5
Is indicated by a one-dot chain line, and the other aggregate band 6 is indicated by a two-dot chain line. In addition, each collective band is shown apart from the collective plate for easy understanding.

As can be understood from these descriptions, one side end face 1A of each capacitor element 1 is in contact with or close to the collective band 5, and the other side end face 1B
Face the collective band 6 in the same manner. Therefore, each of the collective bands 5, 6 acts as a stopper, and even if the capacitor element 1 is shifted in the width direction, the capacitor element 1 is shifted beyond the collective bands 5, 6 to the outside. There is no.

The capacitor assembly 7 constructed as described above is housed in a tank 15 as shown in FIG. Then, after being filled with insulating oil or insulating gas, it is sealed and completed as a capacitor device. As described above, since the displacement of the capacitor element 1 is regulated by the collective bands 5 and 6, the distance between the side end surface of the capacitor element 1 and the wall surface of the tank 8 is equal to the depth of each of the notches 11 to 14. Is maintained as a limit. Therefore, the capacitor element 1 does not come close to the wall surface of the tank 8 due to vibrations during transportation and transportation as well as during the assembling operation.
This eliminates the risk that the ground insulation properties will be impaired.

The collective band 5 is accommodated in the notches 11 and 13, and the collective band 6 is accommodated in the notches 12 and 14. It doesn't move out of place. That is, each aggregate band is always at a stable position. This is effective in reliably maintaining the tightened state of the capacitor element 1 by the collective band.

In the embodiment shown in FIG.
Although only one notch is formed at one side edge of 4, the present invention is not limited to this, and two or more notches may be formed as necessary.

[0019]

As described above, according to the present invention, when a plurality of capacitor elements are juxtaposed and tightened using an assembly plate and an assembly band to form a capacitor assembly,
As a result, it is possible to avoid the deterioration of the insulation properties to the ground due to the displaced movement of the tightened capacitor element, and to prevent the displacement of the collective band.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a perspective view of a capacitor assembly partially cut away and shown.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view of a capacitor device according to the present invention.

FIG. 4 is a perspective view of a conventional capacitor assembly.

FIG. 5 is a plan view of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Capacitor element 1A, 1B Side end face of capacitor element 1 2 Capacitor juxtaposed body 3, 4 Assembly plate 3A, 3B Side edge of assembly plate 4 4A, 4B Side edge of assembly plate 4, 5, 6 Assembly band 7 Capacitor assembly Body 11-14 Notch

Claims (1)

[Claims] An assembly plate is abutted on both sides of a capacitor juxtaposed body in which a plurality of flat capacitor elements are juxtaposed, and first and second assembly bands surrounding the capacitor juxtaposed body and the assembly are provided. In the capacitor device provided with the capacitor juxtaposed body and the capacitor assembly formed by tightly integrating the assembly, a first notch is provided at one side edge of each of the assembly plates, and the other notch is provided at each other. A second notch having a different height position from the first notch is provided on a side edge, and the first and second aggregated bands are provided.
The first collective band passes through the inside of the first cutout, and the second collective band passes through the inside of the second cutout, so that the two collective bands are connected to the capacitor juxtaposition. A capacitor device that surrounds the surroundings.