JPS6321079Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum shield breaker fixed to a metal mounting plate, and more particularly to a vacuum shield breaker fixed to a mounting plate with an insulating frame interposed therebetween.

2. Description of the Related Art In general, a so-called vacuum shield circuit breaker, which is used to cut off current in power equipment and the like, is generally used, which has a fixed electrode and a movable electrode inside a vacuum container. Conventionally, so-called vacuum shield disconnectors have a fixed electrode and a movable electrode mounted inside a vacuum container formed by a cylindrical part made of metal and both ends made of insulating material, or a cylindrical part made of insulating material and both ends made of metal. In addition, the electrode rod of the movable electrode is covered with a bellows, the fixed electrode is fixed to the fixed terminal conductor, and the movable electrode is connected to the movable terminal conductor in a vertically movable manner. It is constructed by attaching a conductor to a mounting plate made of a metal plate with an insulator interposed therebetween.

However, the problem with this vacuum cutter is that it is susceptible to impact because it is not provided with a cushioning material to cushion the impact when the vacuum cutter is turned on or off. In addition, there was a problem that the dielectric strength was low because no insulator was provided to improve insulation. For this reason, those equipped with an insulator are used, but
In this case, even if the dielectric strength of the vacuum container is improved, there is a problem in that when it is attached to a metal mounting plate, the insulation to ground is weak.

This invention was made in view of the above problems,
The purpose is to form a vacuum shield and disconnector by inserting and mounting a filling member made of elastic material inside the insulating container, and then attaching this vacuum shield and disconnector to a mounting plate through an insulating frame. The purpose of the present invention is to provide a vacuum shield and disconnector that has improved buffering function and dielectric strength, as well as improved ground insulation.

Hereinafter, the present invention will be described in detail with reference to the drawings showing one embodiment. 1 shown in FIG. 1 is a bottomed cup-shaped insulating container made of an insulating material and having an open end and a flange 2, and 4 is made of an insulating material and a cylindrical part made of metal that is housed in the insulating container 1. It is a vacuum container formed by both ends or a cylindrical part made of an insulating material and both ends made of metal.

3 wraps and surrounds the vacuum container 4 and is tightly packed into the insulating container 1 to improve the dielectric strength of the vacuum shield breaker and to reduce the impact when it is inserted and disconnected. For example, polybutadiene rubber, epoxy rubber, silicone, etc. This is a filling member made of an elastic material such as rubber.

A fixed electrode 5 and a movable electrode 6 are attached to the vacuum container 4, and the electrode rod 7 of the fixed electrode 5 is connected to a fixed side terminal conductor 8.
is fixed. The electrode rod 9 of the movable electrode 6 is connected to the movable terminal conductor 10 so as to be freely movable up and down. Reference numeral 11 denotes an O-shaped insulating ring interposed between the flange 2 of the insulating container 1 and the later-described attachment portion of the fixed-side insulating frame 12, and 13 denotes the movable-side insulating frame provided with the later-described attachment portion to which the movable-side terminal conductor 10 is attached. It is.

The insulating frames 12 and 13 are formed integrally with three phases (not shown) and are attached to a metal mounting plate 14. Reference numeral 15 denotes a protruding portion formed to protrude inwardly and having a hole 16 that allows the movable electrode rod 9 provided at the bottom of the bottomed cup-shaped insulating container 1 to move up and down. The inner periphery of the protrusion 15 is filled with the filling member 3 in close contact. 17 is a movable electrode rod 9
This is a ring contact that is movable up and down and connected to the movable terminal conductor 10. 33 is a movable electrode 9
It is a bellows that covers the

Incidentally, a semicircular groove 18 is provided in the flange 2 of the insulating container 1 in order to install the insulating O-ring 11 therein. In order to correspond to the groove 18, a semicircular groove 20 is provided in the lower surface portion of the mounting portion 19 provided with an opening into which the fixed electrode rod 7 of the fixed side insulating frame 12 is inserted. Note that a female screw for fixing the stationary side terminal conductor 7 with a fixture is provided on the upper surface of the mounting portion 19.

21 is an interphase insulation barrier provided on the back surface of the mounting portion 19, and 22 is a ground insulation barrier provided on the side surface of the mounting portion 19 on the mounting plate 14 side (right side in the figure).
Both insulating barriers 21 and 22 increase the air flash voltage. Reference numeral 23 denotes a mounting portion of the movable insulating frame 13, and a through hole is provided in the mounting portion 23 to allow the movable electrode rod 9 to move up and down freely.

A female thread is provided on the lower surface (lower side in the figure) of the mounting portion 23 for fixing the movable terminal conductor 10.
24 and 25 are interphase insulation barriers provided in the vertical direction on the back surface of the mounting portion 23, and 26 and 27 are mounting plates 14.
This is a ground insulating barrier provided in the vertical direction (right side in the figure) of the side, and increases the air flash fault voltage and the flash fault voltage.

The flange portion 2 is fixed to the mounting portion 19 using an O-ring 11.
are buried in the grooves 18 and 20, and the gap e at the opening of the insulating container 1 is sealed and fixed as shown in FIG. For this reason, the O-ring 11 is indicated by 28. Inside of the fixture that fixes the collar part 2 to the mounting part 19 (left side in the figure)
It is installed in In order to seal the gap e, as shown in FIGS. 2 and 3, a sealing plate 2 made of an elastic insulating material and formed in a ring-shaped plate shape is used.
9 may also be used. This sealing plate 29 has a sealing part 30 that comes into contact with the lower surface of the mounting part 19 at the end (left side in the drawing) and a shield part that is connected to this sealing part 30 and cuts off the outer part of the collar part 2. A through hole 32 is provided through which the fixing member 31 and the fixing member 28 are passed, and the gap e generated between the collar portion 2 and the mounting portion 19 is sealed. Note that a liquid packing (not shown) may be used to seal this gap e. It is desirable that the gap e is 0, but due to manufacturing errors etc.
<0, gap e>0 occurs, and in the case of gap e<0, the fixed electrode 5 is connected to the fixed side terminal conductor 8.
When the insulating container 1 is fixed to the position shown in FIG. A tensile force acts on the insulating container 1 and the vacuum container 4, which tends to cause interfacial peeling or cracking, and when this crack occurs, the dielectric strength and elastic function are reduced.

To prevent this, the gap e>0 is manufactured in advance. By the way, in this case, the gap e
absorbs the tensile force, so interfacial peeling or cracking of the filling member 3 can be prevented. This will result in a decline. Therefore, the insulating ring 11 is attached to the fixture 28.
It is installed on the inside as shown in the figure to seal the gap e and improve the insulation strength, as well as to prevent dust and moisture from entering the vacuum shield and disconnector, and to prevent the filling member 3 made of an elastic material from coming into contact with the outside air. The purpose is to maintain elastic function by cutting the material.

In addition, the lower surface part of the mounting part 19 and the collar part 2 are connected to the fixture 2.
8, the insulating container 1 will not be lifted. Even if a lifting force is applied by an external force, the fixed electrode 7 fixed to the upper surface of the mounting part 19 and the fixed side terminal conductor 8 will suppress it, and if the protruding part 15 of the insulating container 1 hits the bottom of the vacuum container 4, Because of this, lifting of the insulating container 1 is prevented.

As explained above, the present invention includes a vacuum container equipped with at least one pair of fixed and movable electrodes that can be moved toward and away from an insulating container having an opening with a flange at one end, and a filling member made of an elastic material. a fixed-side insulating frame that improves the dielectric strength of the flange by attaching an insulating ring to the flange to seal the opening together with a fixed-side terminal conductor to which the fixed electrode is fixed; The movable terminal conductor to which the movable electrode connects is fixed to a movable insulating frame that improves dielectric strength, and each insulating frame is attached to a mounting plate. The applied impact is alleviated and stable dielectric strength can be maintained. In addition, interphase and ground insulation is improved, and the split configuration of the insulating frame simplifies assembly, reduces size and weight, and reduces manufacturing costs.

[Brief explanation of the drawing]

1, 2, and 3 show an embodiment of the present invention, with FIG. 1 being a front sectional view, and FIGS. 2 and 3 being sectional views of essential parts. 1... Insulating container, 2... Flange, 3... Filling member, 4... Vacuum container, 5... Fixed electrode, 6... Movable electrode, 7, 9... Electrode rod, 8... Fixed side terminal. Conductor, 10... Movable side terminal conductor, 11... Insulating ring, 12, 13... Insulating frame, 14... Mounting plate, 18, 20... Groove, 19, 23... Mounting part,
21, 24, 25... interphase insulation barrier, 22, 2
6, 27... Ground insulation barrier.

Claims (1)

[Scope of utility model registration request] A vacuum consisting of a fixed electrode rod and a movable electrode rod equipped with fixed and movable electrodes that can be freely moved in and out of an insulating container with an opening having a flange at one end, and an insulating filling material made of an elastic material inside. A fixed side which fixes a fixed side terminal conductor to which the fixed electrode rod is fixed, and seals and fixes the opening through an elastic ring member made of an insulating material arranged around the periphery of the flange. A vacuum shield disconnector comprising an insulating frame and a movable insulating frame for fixing a movable terminal conductor to which the movable electrode rod is connected, and each of the insulating frames is fixed to a mounting plate.