JPS6220125Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vacuum shield breaker, and more particularly to an improved vacuum shield breaker in which a vacuum valve is housed within an insulating container.

As is well known, some vacuum shield disconnectors are constructed by housing a vacuum valve having a shield disconnection contact part in a vacuum container and further housed in an insulating container such as an insulator tube.

When electrically attaching and detaching a vacuum valve to the upper terminal of an insulating container such as an insulator tube, the higher the voltage, the more
Attaching and detaching the upper connection part requires work at height,
This method has the drawback that it requires a lot of equipment and time for the work. As a specific means to eliminate this drawback, a structure in which an automatic coupling device is attached to the external shaft of the vacuum valve on the fixed contact side has already been considered.

FIG. 1 shows an example of a vacuum shear disconnection section having an automatic coupling device.

In FIG. 1, the vacuum valve 4 housed in the insulating container 1 can be attached and detached by simply attaching and detaching the cover 13 from the lower flange 3 of the insulating container 1. 7 and the upper terminal 2 can be attached and detached.

However, with the recent development of large-capacity devices, there is a need for a wipe on the fixed contact side of the vacuum valve 4 to provide a buffer at the time of closing and to increase the speed at which the contact opens at the time of cooling. In this case, in the above configuration, the external shaft 7 on the fixed contact side is connected to the vacuum valve 4.
Since the actuation is performed through a bellows (not shown) inside the shaft, the shaft may not be used for direct communication in some cases.

The present invention was developed in view of the above points, and it has a shock absorber that is linked to the fixed contact in a vacuum valve with a wipe on the fixed contact side, and the outside of the shock absorber can be automatically connected to increase capacity. The purpose of this is to obtain a vacuum shield and disconnector that can handle the problem.

Below, we will explain a vacuum breaker in which an oil dashpot is attached as a buffer device that works in conjunction with the wiped fixed contact side of a vacuum valve, and the outside of the oil dashpot is used as an automatic connection part.

FIG. 2 shows the breaker portion of the vacuum breaker according to the present invention.

The upper opening of an insulating container 1 such as an insulator tube is closed with an upper terminal 2, and a shock absorber A equipped with an oil dump pot 15 is fixed to the inner surface of the upper terminal 2 inside the container 1. On the other hand, the lower opening of the container 1 is closed by the lower terminal 3 and the cover 13. The vacuum valve 4 is housed in the insulating container 1 formed in this manner together with an insulating gas. The vacuum valve 4 has a fixed contact 6 and a movable contact 5 supported by a bellows (not shown) so as to be able to come into contact with and separate from the fixed contact 6 in a vacuum container. is installed, and this axis 1
6 is led out through the cover 13 in an airtight manner and is connected to an operating device (not shown). 12
is a holding spring disposed between the inner surface of the cover 13 and the vacuum valve 4. Thus, the fixed contact shaft 7 is disposed so as to pass through the support member 9 attached to the dart pot cylinder 10 which is fitted through the contact piece 11 into the hanging part of the upper terminal 2 housing the buffer device A. A sliding contact 8 is arranged between the support member 9 and the shaft 7. Thereby, the outer periphery of the cylinder 10 constitutes an automatic connection part with the upper terminal 2. Sho 14
is a bellows for providing the fixed contact 6 with a wipe.

However, when the movable contact 5 is turned on, the fixed contact 6
When pressed, current flows from the fixed contact shaft 7 through the sliding contact 8, the support member 9, the dashpot cylinder 10, and the contact piece 11 to the upper terminal 2.

Here, the dart pot cylinder 10 is fixed to the vacuum valve 4 via a support member 9, and the push-up force of the holding spring 12 causes the centering of the entire vacuum valve between the upper terminal 2, the upward stopper, and the oscillation. Become a woman.

The vacuum valve 4 can be attached and detached only from the bottom of the bushing 1 by attaching and detaching the lower cover 13.

As described above, according to the present invention, the fixed contact shaft is inserted into the support member having one end fixed to the cylinder of the shock absorber provided at the upper terminal and the other end fixed to the vacuum valve, and the fixed contact shaft is inserted into the cylinder of the shock absorber provided at the upper terminal. The outer peripheral surface is fitted with the hanging part of the upper terminal 2 so that the connection is automatic here, and the fixed contact side is also fitted with the bellows 1.
4 to provide a wipe, it is possible to provide a vacuum shield and disconnector that can provide buffering during input and increase the speed at which the contact opens when the clamp is disconnected.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional device, and FIG. 2 is a sectional view of an embodiment of the present invention. 1... Insulating container, 2... Upper terminal, 3... Lower terminal, 4... Vacuum valve, 5... Movable contact, 6
... Fixed contact, 7... Fixed contact shaft, 8... Sliding contact, 9... Support member, 10... Dashpot cylinder, 11... Contact piece, 12... Holding spring, 13... ...Cover, 14...Bellows, 15
...Oil dash pot, 16...Movable contact shaft.

Claims (1)

[Scope of utility model registration request] an insulating container, an upper terminal having a hanging portion on an inner surface that closes an upper opening of the insulating container, and a lower closing member into which a movable contact shaft of a vacuum valve that closes a lower opening of the insulating container is movably inserted. , consisting of the vacuum valve, which is also provided with a bellows on the side of the fixed contact housed in the insulating container, and a buffer device arranged in the hanging part of the upper terminal and interlocked with the fixed contact axis of the vacuum valve, The cylinder of this shock absorber is fitted into the inner surface of the hanging part of the upper terminal, and one end of a support member through which the fixed contact shaft is movably inserted is fixed to the cylinder, and the other end of the support member is fixed to the cylinder. is a vacuum shutoff switch that is fixed to a vacuum valve.