JPH0351944Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to the structure of a porcelain-tube type capacitor in which a capacitor body is housed within a porcelain tube.

[Prior art]

Ceramic tube capacitors include coupling capacitors and coupling capacitors used in capacitor-type voltage transformers, but here we will discuss coupling capacitors for capacitor-type voltage transformers.

Conventionally, there has been one of this type as shown in FIG. In the figure, 1 is a capacitor body formed by folding a single concentric winding to form an almost rectangular shape, 2 is a support plate that supports the stacked capacitor bodies 1, and 3 is a receiving plate that receives the capacitor bodies 1. The capacitor body 1 is connected to the support plate 2 by a fastening part 4 to support the capacitor body 1. Reference numeral 5 designates an insulator tube that houses the capacitor body 1, and has mounting fittings 6 integrated at both ends. Reference numeral 7 denotes insulating oil, and 8 and 9 denote a flange-shaped bottom plate and a top plate, respectively, for closing both ends of the insulator tube 5, which are each attached to the mounting bracket 6 by fastening parts 10. Note that a cast bushing 11 is attached to the bottom plate 8 and is used for connection with the outside.

Since the conventional porcelain tube type capacitor is constructed as described above, mounting fittings 6 are required at both ends of the porcelain tube 5, and the length of the porcelain tube is longer than that required for the insulation distance. In addition, there were disadvantages such as the large number of fastening parts, which increased the time required for assembly, and the disadvantage of being uneconomical and large.

[Summary of the idea]

This idea was made in order to eliminate the drawbacks of the conventional ones as described above.The top plate and the bottom plate are connected by a central insulating shaft made of an insulating material, and are wound in a concentric cylindrical shape around this central insulating shaft. By attaching a capacitor body having a multiple structure, the purpose is to eliminate the need for mounting fittings and to achieve miniaturization and ease of assembly.

[Example of idea]

A ceramic tube type capacitor according to an embodiment of this invention will be explained with reference to FIG.

In FIG. 2, reference numeral 12 denotes a so-called round-wound capacitor body formed into a concentric cylindrical shape, and 13 denotes a winding core of the capacitor body 12. Reference numeral 14 denotes an insulator tube without mounting fittings, and 15 denotes a central insulating shaft made of an insulator that penetrates through the capacitor element body 12, the upper end of which is screwed onto the top plate 16, and the lower end of which is screwed into a stop plate 17.
and is connected to a bottom plate 19 via an elastic material 18. 20 is a gasket, the top plate 16 and the bottom plate 19
are pressed against the insulator tube 14 by the elastic material 18, so that the sealing of these parts is ensured. 21
22 is the connection lead that connects each capacitor body 12 in series, and 22 is the top capacitor body 12.
It is connected to the top plate 16 by a connection lead pulled out from the top plate 16. 23 is a connection lead drawn out from the bottom capacitor body 12, and is connected to the bottom plate 19 as in the conventional case.
It is taken out from the cast bushing 11 attached to the outside. In addition, the winding core 13 and the central insulating shaft 15
A spacer (not shown) or the like is inserted between the two so that the two are completely integrated.

Therefore, in the above embodiment, the central insulating shaft 15
constitutes a so-called center clamp, and the top plate 16
Since the bottom plate 19 is pressed against the insulator tube 14 and integrated with the insulator tube 14, the conventional mounting bracket 6 is not required, and the insulator tube can be made smaller and cheaper, and the fastening parts 10 are also eliminated, which reduces the assembly work time, making it even more economical. become a target. Furthermore, since the outer shape of the capacitor body 12 is cylindrical, the integral fraction improves when the capacitor body 12 is housed in the same cylindrical insulator tube 14.
4 can be made smaller.

[Effect of idea]

As explained above, this device connects the top plate and the bottom plate with a central insulating shaft made of an insulating material, and the capacitor body is wound around this central insulating shaft in a concentric cylindrical shape. This has the effect of making the insulator tube smaller and simplifying the assembly of the capacitor by eliminating the need for additional mounting hardware.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view showing a conventional porcelain tube type capacitor, and FIG. 2 is a sectional side view showing a porcelain tube type capacitor according to an embodiment of the invention. In the figure, 12 is a capacitor body, 14 is an insulator tube, 15 is a central insulating shaft, 16 is a top plate, and 19 is a bottom plate. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In the case where both ends of an insulator tube are closed with a top plate and a bottom plate, and a capacitor element body connected in series is housed inside, the top plate and the bottom plate are made of an insulating material. What is claimed is: 1. A ceramic tube type capacitor, characterized in that the capacitor body is connected by a central insulating shaft consisting of a plurality of insulating shafts, and the capacitor body is wound in a concentric cylindrical shape around the central insulating shaft. (2) Utility model registration claim 1, characterized in that the central insulating shaft is configured to press and connect the top plate and the bottom plate to both ends of the insulator tube through an elastic material.
The insulator tube type capacitor described in section.