JPH08308039A - Fixed insulation switching apparatus - Google Patents

Abstract

PURPOSE: To facilitate the manufacture of a polar part by providing an oblique surface at the peripheral edge of the part opposed to the fixed side flange of the vacuum interrupter of an upper conductor, and mounting an O ring for preventing the invasion of resin. CONSTITUTION: The upper conductor 15 so fixed as to bolt-clamp the fixed lead 1B of a vacuum interrupter (VI) 1 is provided with an oblique surface 15A at the peripheral edge of the part opposed to the fixed side flange 1D of the VI 1, and a smaller O-ring 21 is mounted at the region between the surface 15A and the flange 1D. When the gap between the flange 1D of the VI1 and the conductor 15 is small, the ring 21 is elongated, while when the gap is large, the ring 21 is contracted to bring the surface 15A into close contact with the flange 1D. Thus, at the time of molding, resin is prevented from being invaded into the gap, a resin molding 16 is not cracked or does not cause conduction failure, Further, its assembling is simple, and completed in a short time, and the manufacture of the polar part is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vacuum interrupter (V
The invention relates to a solid insulation switchgear using (I), and more particularly to an improvement of its pole portion.

[0002]

2. Description of the Related Art A solid insulated switchgear is composed of a movable part, which has a charging part molded with an insulating resin and is mounted on a trolley together with a VI operating mechanism, and a fixed part having a busbar, a grounding device, a cable connecting part and the like. The upper part (cable side) disconnecting part and the lower part (busbar side) disconnecting part are brought into contact with and separated from each other by the movement of the movable part. An example of the structure is shown in FIG. In the figure, 1
Is VI, 2 is an upper disconnecting part, 3 is a lower disconnecting part, 4 is an operating mechanism, 5 is a control device, 6 is a disconnecting device, and 7 is a zero-phase current transformer (Z
CT), 8 is a current transformer (CT), 9 is a bus bar, 10 is a grounding device, and 11 is a power cable.

FIG. 6 shows the structure of the VI portion of the mold portion, that is, the so-called pole column portion. A ring contact 12 is attached to the movable lead 1A of VI1.
Are stored in the contact case 13. A triangular lever 14 is pin-connected to the end of the movable lead 1A, and is connected to the operation mechanism 4 (FIG. 5) via the triangular lever 14. The upper conductor 15 is arranged on the upper end surface (fixed flange surface) of the VI 1 and is fixed to the fixed lead 1B by bolting. A resin molded body 16 is molded around these assemblies (internal conductor assemblies). At the time of molding, the inner conductor assembly is set in a mold, and the adjusting plate 17 is used to adjust the total length. The adjusting plate 17 is fixed between the lower end surface (movable lead side) of the VI 1 and the contact case 13 by using a stud bolt 1C, and is formed in a recess on the outer peripheral surface of the contact case 13 from which the end portion of the stud bolt 1C projects. The metal fitting 18 is provided. Further, since a gap (dimension δ) is formed between the fixed side flange of VI 1 and the upper conductor 15, the resin intrusion preventing thin metal plate 19 is wound around the outer peripheral surface.

[0004]

As described above, the upper conductor 15 is fixed to the fixed lead 1B of VI1 by bolting, and a gap is formed between the fixed side flange of VI1 and the upper conductor 15. If resin enters this gap during molding, it causes cracking of the resin molded body 16 and defective conduction (adhesion of resin to the current contact surface), so the strip-shaped metal thin plate 19 is wound around the outer peripheral surface. The metal thin plate 19 is fixed by using or using a self-fusing tape from the outside, which not only takes time but also requires half a day to one day after the work, which is not suitable for quick delivery. .

Further, the inner conductor assembly is assembled by using the contact case 13 as a base. When the dimensions of the assembly do not match, the heavy object in which the upper conductor 15 and VI1 are incorporated is removed from the contact case 13. The size is adjusted by adjusting the number of adjusting plates 17. This work is difficult, and there is a case where a copper adjusting plate 20 is inserted between the fixed lead 1B of the VI 1 and the upper conductor 15 in order to facilitate the adjusting work. In that case, depending on the number of the adjusting plates 20, there is a gap. Since the dimensions change, sufficient consideration must be given to the winding of the thin metal plate 19.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems and to provide a solid insulated switchgear in which the pole portion can be easily manufactured.

[0007]

SUMMARY OF THE INVENTION The present invention is a solid insulation switchgear in which an upper conductor is fixed to a fixed lead of a vacuum interrupter by bolting and is molded with resin to form a pole portion. An inclined surface is provided on the peripheral portion of the portion facing the fixed side flange, and an O ring for preventing resin intrusion is attached to this portion.

Further, according to the present invention, in the solid insulated switchgear in which the upper conductor is fixed to the fixed lead of the vacuum interrupter by bolting and is molded with resin to form a pole portion, a ridge is formed in the middle of the inner peripheral surface. A rubber ring formed to have is mounted on the outer periphery of the edge portion of the vacuum interrupter and the upper conductor so that the protrusion is inserted into the gap between the fixed side flange of the vacuum interrupter and the upper conductor. To do.

[0009]

The O-ring mounted on the region between the inclined surface of the peripheral portion of the upper conductor and the fixed side flange of the VI expands and contracts according to the size of the gap formed between the fixed side flange of the VI and the upper conductor, The close contact is always maintained. Further, in the rubber ring in which the protrusion on the inner peripheral surface is inserted into the gap between the fixed side flange of the VI and the upper conductor, the displacement of the mounting position is restricted, and the size of the gap is slightly different. However, it surely closes the gap. Therefore, the resin is prevented from entering the gap during molding.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings.

Embodiment 1 of the solid insulation switchgear according to the present invention
Are shown in FIGS. In the figure, 1 is VI and 15 is this VI
An upper conductor fixed to the fixed lead 1B of 1 by bolting, a resin molded body 16 and an O-ring 21. The upper conductor 15 is provided with an inclined surface 15A of about 45 ° at a peripheral portion of a portion of the VI1 facing the fixed side flange 1D, and a small O-ring 21 is provided in a region between the inclined surface 15A and the fixed side flange 1D. I am wearing it.

The mounting state of the O-ring 21 is shown in FIG.
It shows in (b). FIG. 2 (a) shows the fixed side flange 1 of VI1.
When the gap (dimension δ) between D and the upper conductor 15 is small, FIG. 2B shows a state where the gap is large. When the gap is small, the O-ring 21 extends, and when it is large, the O-ring 2 is large.
1 contracts and is in close contact with the inclined surface 15A and the fixed side flange 1D. Therefore, it is possible to prevent the resin from entering the gap at the time of molding, and it is possible to prevent the resin molded body 16 from being cracked or having a current failure. Moreover, the assembly is simple and can be completed in a short time.

A second embodiment is shown in FIGS. In the second embodiment, the rubber ring 22 having the protrusion 22A in the middle of the inner peripheral surface is attached so that the protrusion 22A is inserted into the gap formed between the fixed side flange 1D of VI1 and the upper conductor 15. ing. In the ring 22, the thickness of the protrusion 22A is adjusted to the smallest size of the gap, and the ring inner diameter is made slightly smaller than the outer diameter of VI1.

The attached state of the ring 22 is shown in FIGS. 4 (a) and 4 (b).
Shown in 4 (a) shows a state in which the gap between the fixed flange side 1D of VI 1 and the upper conductor 15 is small, and FIG. 4 (b) shows a state in which the gap is large, because the ridge 22A is inserted into the gap. Even if the gap becomes large, the ring 22
The positional deviation of is suppressed to a certain limit, and the gap is reliably closed. The smaller the gap, the more precise the positioning. As a result, the gap is surely closed,
The resin is prevented from entering during molding, and the same effect as that of the first embodiment is obtained.

[0015]

As described above, according to the present invention, the gap between the VI fixed side flange and the upper conductor is closed by the O-ring or the rubber ring having the protrusion on the inner peripheral surface. Assembling is very simple and can be completed in a short time, so that the pole post can be easily manufactured. Moreover, even if the size of the gap changes, the gap can be surely closed by the expansion and contraction of the O-ring or the reliable positioning of the rubber ring, and resin intrusion during molding can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of essential parts showing a first embodiment of a solid insulation switchgear according to the present invention.

2A and 2B show a mounting state of an O-ring in Example 1, where FIG. 2A is a state when the gap is small, and FIG. 2B is a state when the gap is large.

FIG. 3 is a sectional view of essential parts showing a second embodiment of the solid insulation switchgear according to the present invention.

4A and 4B show a mounted state of a rubber ring in Example 2, where FIG. 4A is a state when the gap is small and FIG. 4B is a state when the gap is large.

FIG. 5 is a cross-sectional view showing a structural example of a solid insulation switchgear.

FIG. 6 is a cross-sectional view showing a conventional example of a structure of a pole portion in a solid insulation switchgear.

[Explanation of symbols]

 1 ... VI 1A ... movable lead 1B ... fixed lead 1D ... fixed side flange 15 ... upper conductor 15A ... sloping surface 16 ... resin molding 21 ... O ring 22 ... rubber ring 22A ... projection

Claims (2)

[Claims] 1. A solid insulating switchgear in which an upper conductor is fixed to a fixed lead of a vacuum interrupter by bolting and is molded with a resin to form a pole portion. A portion of the upper conductor facing a fixed side flange of the vacuum interrupter. A solid insulation switchgear characterized in that an inclined surface is provided on the peripheral edge of the, and an O-ring for preventing resin intrusion is attached to this part. 2. A solid insulation switchgear in which an upper conductor is fixed to a fixed lead of a vacuum interrupter by bolting and is molded with resin to form a pole pillar portion, and a protrusion is formed in the middle of the inner peripheral surface. A solid insulated switchgear characterized in that a rubber ring is attached to the outer periphery of the edge of the vacuum interrupter and the upper conductor so that the ridge is inserted into the gap between the fixed flange of the vacuum interrupter and the upper conductor. apparatus.