JPS647547Y2 - - Google Patents

Description

[Detailed explanation of the idea] This proposal relates to the improvement of arc rotating shapers and breakers.

As is well known, the arc rotating type, breaker, and disconnection arc are driven to rotate in an insulating arc-extinguishing fluid to extinguish the arc in a narrow space.

This structure is, for example, as shown in FIG. That is, the magnetic drive coil 2 is disposed outside the fixed contact 1, and the two are electrically connected. A cylindrical shorting ring 3 made of a conductive material is disposed between the contactor 1 and the coil 2, and an arc runner 4 made of an arc-resistant material is arranged on the inner periphery of the lower end of the ring 3. Further, a coil supporting disk 5 is fixed to the outer periphery of the lower end by welding or the like. The tip of the disk 5 or the short circuit ring 3 is electrically connected to the other end of the coil 2.

Further, if necessary, an iron core may be disposed approximately in the center of the coil 2 in order to strengthen the magnetic field of the coil 2. In this case, in order to prevent the iron core from becoming an intermediate electrode and delaying the transfer of the arc to the arc runner 4, an insulating cover may be provided to insulate the iron core from the arc.

A cylindrical movable contact 6 is disposed corresponding to the fixed contact 1, and this contact 6 is connected to a partition wall 1 that is provided in a container 7 and divides the container 7 into a pressurizing chamber 8 and a discharge chamber 9.
0 approximately through the center hole. Further, the movable contactor 6 has a hollow portion 11, and the portion 11 is configured to communicate with the discharge chamber 9 through an opening 12.

The movable contactor 6 is always in contact with the current collector 13,
A lower terminal plate 14 is connected to this current collector 13 . Note that the fixed contact 1 is connected to the upper terminal plate 15.
It is connected to the. Further, the container 7 is filled with an insulating arc extinguishing fluid 16 such as SF ₆ gas or compressed air. The container below the lower terminal board 14 is in charge of ground insulation.

In the above-described configuration, since both contacts 1 and 6 are in contact with each other in the closed circuit state, current can be supplied without any problem.

When the movable contact 6 is separated from the fixed contact 1 during shearing, an arc is generated during this time, and eventually moves between the arc runner 4 and the movable contact 6 and becomes an arc 18. For this reason, since the magnetic drive coil 2 is inserted into the circuit, a magnetic flux 17 is generated around this as shown by the broken line. This magnetic flux 17 drives the arc 18 to rotate. Also, arc 18
As a result, the insulating arc-extinguishing fluid 16 is heated and pressurized, so that a fluid flow A is generated from the pressurization chamber 8 toward the hollow portion 11 and the discharge chamber 9.

As a result, when the energy taken away by the insulating arc-extinguishing fluid 16 exceeds that of the arc 18, the arc 1
8 is extinguished.

However, the above-mentioned device has the disadvantage that it has a large number of constituent members, and also has the problem that the device is large.

The purpose of the present invention is to provide a small and economical arc rotating shaper and disconnector with a small number of parts by using the lower terminal plate and current collector as the partition wall between the pressurizing chamber and the discharge chamber.

The present invention will be explained below based on the embodiment shown in FIG. In the figure, 23 is a current collector, and 24 is a lower terminal plate. These are configured, for example, in a disk shape, and the inside of the container 7 is divided into two upper and lower chambers: a pressurization chamber 8 and a discharge chamber 9. The container of the discharge chamber 9 is responsible for insulation between the lower terminal plate 24 and the ground. It's on. In addition, the same reference numerals as in FIG. 1 indicate the same or corresponding parts.

In the above configuration, since the inside of the container is divided into two chambers by the current collector and the lower terminal plate, there is no need for a special partition wall, and the number of constituent members can be reduced. This has the advantage that the container in the discharge chamber can also be used as a ground insulator, providing a compact and economical device.

Note that the same effect as described above can be obtained even if the lower terminal plate 24 does not have all its parts made of a conductive material, but only the part necessary for electricity supply is made of a conductive material, and the rest is made of an insulating material. . In particular, if a conductive material having a cross-sectional area necessary for current conduction is embedded in an insulating material using a molding technique, the device has the advantage of being extremely simple in structure and inexpensive.

Further, the present invention can be similarly applied to a type in which the movable side and the fixed side are reversed and the movable contactor 6 is provided with the magnetic drive coil 2.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a conventional device, and FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention. 1... Fixed contact, 2... Magnetic drive coil, 4
...Arc runner, 6...Movable contact, 7...
Container, 8... Pressurization chamber, 9... Discharge chamber, 11... Hollow part, 16... Insulating arc extinguishing fluid, 18... Arc,
23... Current collector, 24... Lower terminal board.

Claims (1)

[Claims for Utility Model Registration] A container 7 filled with an insulating arc-extinguishing fluid 16 and sealed at the lower end; an upper terminal plate 15 that seals the upper end of the container 7 and also serves as a pull-out terminal; and the interior of the container 7. A lower terminal plate 24 which functions as a partition wall and doubles as a lead-out terminal divides the lower terminal plate into two upper and lower chambers, a pressurization chamber 8 and a discharge chamber 9, and is fixed to the center of this lower terminal plate 24 and electrically connected thereto. A gap is provided between the current collector 23, the fixed contact 1 housed in the boosting chamber 8 and electrically connected to the upper terminal plate 15, and the fixed contact 1 housed in the boosting chamber 8. an arc runner 4 housed in the pressurization chamber 8 and disposed outside the fixed contact 1, electrically connected at one end to the fixed contact 1 and at the other end to the arc runner 4; When an arc 18 is generated between the arc runner 5 and the movable contactor described below, the arc 18 is inserted into the boosting chamber 8 from the discharge chamber 9 via the magnetic drive coil 2 and the current collector 23. a cylindrical movable contact 6 whose tip contacts the fixed contact 1 at the input position and whose outer periphery slides on the current collector 23; and a hollow portion 11 provided in the movable contact 6 into the discharge chamber. When the movable contact 6 and the fixed contact 1 are separated and an arc 18 is generated between the arc runner 4 and the movable contact 6, the internal pressure of the pressurizing chamber 8 increases and the An arc rotating type disconnector which discharges the insulating arc extinguishing fluid 16 into the discharge chamber 9 through the hollow part 11 and opening 12 of the movable contactor 6.