JPS5812351Y2 - 3-phase puffer type gas switchgear - Google Patents

Description

[Detailed description of the invention] This invention relates to a three-phase batch type buffer type gas switchgear.
In particular, the structure of the adsorbent installation has been improved (~3-phase buffer type gas switchgear).

Generally, in a gas switching device such as a buffer type gas breaker or disconnector in which three phases are housed in one container, an adsorbent is provided for each phase or is inserted into the gas container.

In the former case, the fixed electrode and movable electrode are wrapped in an insulating cylinder and provided with an adsorbent to prevent the compressed gas used for arc extinguishing from dispersing. Although this method has a sufficient adsorption effect, the structure is complicated and costs increase. becomes.

In the latter case, although the structure is simple, the adsorption effect is insufficient.

The purpose of this invention was to eliminate the above-mentioned drawbacks.The purpose of this invention was to collect the compressed gas used for arc extinguishing in a three-phase buffer chamber in one space, and to install an adsorption device in that space. It is an object of the present invention to provide a three-phase buffer type gas switching device which can increase the adsorption effect by dispersing the gas back into the container via the gas switch and can be made smaller.

The present invention is shown below in Figures 1 and 2.
? An example will be described below.

As shown in FIG. 1, a three-phase cutoff portion is housed in a metal container 1 together with an insulating gas such as SF6 gas.

This breaking section for each phase consists of a fixed electrode 5 supported by an insulating cylinder 7 fixed to a fixed electrode support 3, a movable electrode 6 provided opposite the fixed electrode 5, a cylinder 13a, and a piston 1.
3b, or a buffer chamber 8.

The movable electrode 6 is equipped with a cylinder 13a and a current-carrying rod 9, and has an ejection hole and a nozzle 1 communicating with the buffer chamber.
4, a gas ejection path is formed.

The current-carrying rod 9 integrated with the movable electrode 6 is connected to an operating device (not shown) via an insulating rod 10 and is driven.

Conductor 11 of each phase conductive to fixed electrode and movable electrode of each phase
2a through an insulating spacer 25.

As shown in b, each is connected to a terminal 26.

The communication hole 20 of the fixed electrode is provided with a current-carrying contact 5a surrounding the fixed electrode 5 and a communication hole 20 of the fixed electrode that opens in the shield 5b.
In the gas chamber 21 formed by the top cover 2 and the fixed electrode support 3, there is an adsorbent 4a that adsorbs decomposed gas or moisture.
A suction device 4 is provided which accommodates a.

This suction device 4 is attached to the top cover 2, and is provided with a lid 4b that can be removed from the outside, so that the adsorbent 4a can be inserted or replaced from the outside.

This adsorption device 4 has, for example, a mesh-like intake hole in the gas chamber, an opening 4c in the gas chamber 22 on the breaker side, and the gas chamber 21 and the gas chamber 22 are communicated through an adsorbent 4a. There is.

When the insulating rod 10 is pushed upward by an operating device (not shown) in the open state shown in FIG.
The movable electrode 6 is interlocked with the movable electrode 6 and comes into contact with the fixed electrode 5.

From this contact state, the insulating rod 10 is pulled down in response to a separation command, and the energizing rod 9 and movable electrode 6 are further pulled down to separate them from the fixed electrode 5.

At this time, the piston 13b compresses the insulating gas in the buffer chamber 8, and the compressed insulating gas is ejected from the nozzle 14 to extinguish the mold plate generated between the fixed electrode 5 and the movable electrode 6.

Most of the compressed gas used for extinguishing the mold plate arc passes through the communication hole 20 in the fixed part 15, passes through the inside of the insulating cylinder 7, and collects in the gas chamber 21 between the top cover 2 and the fixed part support 3. .

The compressed gas used to extinguish the arc of the mold plate is forced to pass through the adsorbent 4a at a flow rate due to expansion and disperse into the gas chamber 22 in the metal container 1.

At that time, the adsorbent 4a absorbs decomposed gas, moisture, etc.

As described above, according to the present invention, the compressed gas used for arc extinguishing the mold plate gathers in one place through the communication hole provided in the support member for supporting the fixed electrode, passes through the adsorbent 4a, and passes through the metal container. 1, it is not necessary to provide an adsorbent for each phase as in the past, resulting in low cost and the best adsorption effect.

In addition, since the compressed gas used to extinguish the arc of the mold plate is collected in one place, the gap between the electrodes is shortened because a large amount of the compressed gas after extinguishing the arc of the mold plate will not be discharged into the container and fill it. Therefore, it is possible to provide a three-phase buffer type switchgear in which the entire breaker is miniaturized.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the three-phase buffer type gas breaker of the present invention, and FIGS. 2a and 2b are half-plane views of the terminals of the gas breaker of the present invention, respectively. 1...Metal container, 2...Dog cover, 3...Fixed electrode, 4...Adsorption device,
5... Fixed electrode, 6... Movable electrode, 7
...Insulation tube, 8...Buffer chamber, 9.
...Electricity rod, 10...Insulated operation rod, 11...Conductor, 12----Slide contact, 13a...Cylinder, 13b...
...Piston, 14...Nozzle, 15...
...Fixing part, 20...Communication hole, 21゜22
...Gas chamber, 25...Spacer, 26
...Terminal.

Claims (1)

[Scope of utility model registration request] A fixed electrode and a movable electrode for each phase are arranged side by side in a gas container, and a buffer chamber for each phase is formed by a buffer cylinder and a fixed piston that operate in conjunction with each movable electrode, and the electrodes are separated. The gas compressed in each buffer chamber is sprayed onto each electric arc generated between the electrodes to extinguish the arc.
A suction device is arranged in a space formed in the container and led to a space formed in the container through a fixing part that supports fixed electrodes of each phase and a communication hole formed in an insulating tube. A three-phase buffer type gas switching device characterized in that the gas is connected to the inside of the gas container again through the gas container.