JPS6230760Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a storage device for a metal cup type vacuum interrupter.

This type of vacuum interrupter has the shape shown in FIG. 1. In FIG. insulating end plate 12 of
(ceramics end plate), insulating end plate 12
A vacuum container 13 is formed with the metal cup facing down, a fixed lead rod 14 is airtightly provided on the ceiling of the metal container 11 (bottom of the container), and a movable lead rod opposite to the fixed lead rod 14 is provided. 15 through the insulating end plate 12 via a bellows 16 in an airtight manner. In the vacuum interrupter shown in FIG. 1, a shield body 17 is disposed coaxially within the metal container 11, and this shield body 17 is fixed to the insulating end plate 12. In addition, 18 is a bellows shield, 19 is a fixed electrode, 20 is a movable electrode,
21 is a current collecting flange.

In the vacuum interrupter constructed as described above, the insulation distance, that is, the insulation strength, is determined by the length shown by arrow 22 in FIG. Therefore, in order to obtain sufficient insulation strength, the diameter of the insulating end plate 12 must be made extremely large. As a result, if this type of vacuum interrupter is constructed for high voltage use, it has the disadvantage of being large in size.

In order to eliminate the above-mentioned drawbacks, this invention forms a male threaded part on the outer periphery of a metal container, and stores it together with an insulating packing in a bowl-shaped case made of an insulating member that has a female threaded part that is screwed into this male threaded part. Therefore, it is an object of the present invention to provide a storage device for a metal cup type vacuum interrupter that can be made compact, improve insulation strength, and be easily replaced.

An embodiment of this invention will be described below with reference to the drawings, in which the same parts as in FIG. 1 are denoted by the same reference numerals.

2 to 4, a male threaded portion 23 is formed on the outer periphery of the approximately central portion of the metal container 11. As shown in FIGS. Reference numeral 24 denotes a case of the vacuum container 13 made of an insulating member formed into a bowl shape, and a hexagonal part 25 for tightening is protruded from the center of the bottom of the case 24. This tightening hexagonal part 25 is provided with a hole 26 through which the movable lead rod 15 passes. A female screw portion 27 is formed on the inner peripheral wall surface 24a of the storage case 24, and packing grooves 28a and 28b are formed on the inner bottom surface 24b.

As shown in FIG. 2 above, the vacuum container 13 is formed with a male threaded portion 23, and as shown in FIGS. 3A to 3C, a female threaded portion 27 is formed in the case 24. When housed in the case 24, the vacuum container 13 is housed while being screwed into the case 24. At this time, the packing groove 2 of the case 24
Insulating gaskets 29a, 29b are attached to 8a, 28b in advance.
The insulating gaskets 29a and 29b are attached so as to be pressed against the lower surface of the insulating end plate 12 when the vacuum container 13 is housed.

As described above, when the vacuum container 13 is attached to the case 24, the insulation packings 29a and 29b are interposed, so that insulation strength can be easily obtained. Furthermore, since the vacuum container 13 is covered with a case 24 made of an insulating material and the gaskets 29a and 29b are interposed therebetween, electrical insulation shielding is facilitated. Furthermore, since the hexagonal part 25 for tightening is provided protruding from the bottom of the case 24, the insulation creepage distance can be increased, and this hexagonal part 25 is used for tightening with a wrench when screwing the vacuum container 13. Fixed lead rod 1
It also functions as a spanner when attaching the main circuit conductor to 4.

As described above, according to this invention, the vacuum container is screwed to the case by forming a male thread at a predetermined location on the outer periphery of the vacuum container and a female thread on the inner peripheral wall of the case. Since an insulating gasket is inserted between the insulating end plate of the vacuum container, it is easy to improve the insulation strength, and since the vacuum container is covered with a case, electrical insulation is good, and the vacuum There are various excellent effects such as being able to easily replace the container by simply unscrewing it.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of a metal cup type vacuum interrupter; Figs. 2 to 4 show an embodiment of the invention; Fig. 2 is a front view of the vacuum interrupter; Figures 3A, B, and C show the case, Figure 3A is a partially sectional front view, Figure 3B is a top view, Figure 3C is a bottom view, and Figure 4 shows the vacuum interrupter. FIG. 3 is a front view showing a state in which the device is screwed onto the case. 11...Metal container, 12...Insulating end plate, 13...
...Vacuum container, 14...Fixed lead rod, 15...Movable lead rod, 16...Bellows, 23...Male thread portion, 24...Case, 24a...Inner peripheral wall surface, 26
... Hole, 27 ... Female thread part, 28a, 28b ...
Grooves, 29a, 29b...Insulating packing.

Claims (1)

[Scope of utility model registration request] The opening of the bottomed cylindrical metal container 11 is connected to the insulating end plate 1.
At the same time, a fixed lead rod 14 is provided at the bottom of the metal container, and a movable lead rod 15 facing the fixed lead rod is attached to the insulating end plate 12 through a bellows 16 in an airtight manner. The metal cup type vacuum interrupter that constitutes the vacuum container 13 includes a bowl-shaped case 24 made of an insulating material that houses the vacuum container, and a male threaded portion 23 formed at a predetermined portion on the outer periphery of the vacuum container.
a female threaded portion 27 formed on the inner circumferential wall surface 24a of the case, into which the male threaded portion is screwed when the vacuum container is housed in the case; and packing grooves 28a, 28b formed on the inner bottom surface of the case; A storage device for a metal cup type vacuum interrupter, characterized in that insulating packings 29a and 29b are provided in this groove.