JPS59169016A - Buffer type breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a buffer-type gas breaker, and more particularly to a tank-type buffer-type gas breaker in which the structure of the insulating support means of the fixed electrode part and the current-carrying contactor is improved. .

[Technical background of the invention and its problems]

In recent years, buffer-type gas circuit breakers filled with an insulating gas with excellent insulation and arc-extinguishing properties, such as SP6 gas, have been used as tank-type gas circuit breakers for sealed gas-insulated switchgear insulated using the same type of insulating gas. This is an extremely suitable breaker.

In such a tank-shaped buffer type gas breaker, it is necessary to support the fixed electrode part and the movable electrode part with an insulator by means different from that in a peel-off type breaker. First, in this structure, the fixed electrode part is supported on the tank side by a fixed-side insulating cylinder, and the movable electrode part and buffer part, which are connected to the operating mechanism via the operating iron, are supported on the tank side by a movable-side insulating cylinder. This is a double-sided system that is configured to hold both sides.

On the other hand, the second method is a cantilever type in which the fixed electrode part is fixed to the movable electrode part by an insulating cylinder, and the movable electrode part and the buffer part are supported on the tank side by a movable insulating cylinder.

However, in the second cantilever method, the fixed and movable electrode parts are fixed so as to sandwich both ends of the insulating cylinder, so it is more effective for centering both electrode parts than the first double-end support method. . However, on the other hand, the arc extinguishing chamber for interrupting the current is narrowed, and there is a risk that the interrupting performance will be impaired compared to the first method. Therefore, as an improvement on the second method, a method has been proposed in which a plurality of insulating rods are used instead of fixing the fixed electrode section to the movable electrode section using an insulating tube. However, insulating rods are more susceptible to bending than insulating tubes, and there is a risk of misalignment.The solution to this problem is to suppress the radial dimensions of the fixed electrode part and, by extension, the movable electrode part, by providing a current-carrying contact. There were some issues that should be addressed.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and its objectives are to prevent misalignment, to minimize and strengthen the insulation support between the fixed electrode part and the movable electrode part, and to reduce the radius of both electrode parts. It is an object of the present invention to provide a buffer type gas breaker having a reduced directional dimension and provided with a current-carrying contact.

[Summary of the invention]

In order to achieve this object, the present invention stores a fixed electrode part, a movable electrode part facing the fixed electrode part, and a buffer part provided adjacent to the movable electrode part inside a tank, and also fills an insulating gas. Shields are provided on opposite sides of the fixed electrode section and the movable electrode section, and both ends of a plurality of insulating rods are fixed to both shields at approximately equal intervals, respectively.
Fixed current-carrying contacts are provided on the inside of the shield of the fixed electrode part at approximately equal intervals with the mounting parts of the insulating rods, and movable current-carrying contacts that contact correspondingly are formed on the movable electrode part. By fixing the fixed part of the adjacent buffer part to the inside of the tank via an insulating cylinder, and connecting the movable electrode part and the movable side of the buffer part to the operating part via the operating rod, Its features are that the insulating support between the fixed electrode part and the movable electrode part is minimized and strong, and the radial dimension of both electrode parts is reduced to provide a current-carrying contact.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A buffer type gas breaker according to an embodiment of the present invention will be described below with reference to the drawings. In Figure 1, tank (Ll)
Inside there is a fixed electrode part (12), a movable electrode part (1) opposite to this, a buffer part a powder adjacent to this, and a fixed side of this buffer part (15) connected to a tank aη through an insulating cylinder 01lil. The movable electrode part (1) and the movable side of the buffer part (0) are connected via an insulating rod αη connected to an operating rod (not shown). The fixed electrode part α2 is connected to the sunrise part (18a) via the conductor (18a).
conductor (19a) from the fixed side of the buffer section 09.
It is led out to the sunrise part H via.

Then, the fixed electrode part α and the movable electrode part (1
Shield (a), (2
1), and insulating rods (221
Arrange a plurality of the shields (A) and (21) at almost equal intervals on the circumference of each shield (A) and (21), and place the shields ( 2(l
Fixed current-carrying contacts (two are arranged inside the l).

In FIG. 2, the fixed electrode part 0 (2) has a fixed electrode mounting member (2Gl) with a fixed electrode (property) provided approximately in the center of the bottom of the fixed electrode mounting member (2Gl).
A shield (2
0). This shield (20) has a rounded shape to alleviate the electric field, and insulating rods (two mounting portions (25a) are formed at approximately equal intervals around the circumference of the end, and are alternately and approximately equally spaced with the mounting portions (25a). 2 fixed current-carrying contacts (2) are placed inside the shield.Furthermore, the tip of the shield (A) is almost equipped with a fixed electrode (2).
5) is formed to cover the tip of the fixed electrode mounting member (
Attach the conductor (18a) to a).

The movable electrode part (13) is connected to the cylinder (
29), a cylindrical movable electrode (A) is provided approximately in the center of this end surface, and a gas flow path (31a) is provided around this.
) to provide an insulated nozzle color, and this insulated nozzle C
A movable current-carrying contact 〇3 is provided so that 31) is fixed to the end face of the cylinder bracket.

The buffer part (1■ is the cylinder θ (g) and the piston (g) inserted into this) (=therefore, the buffer chamber (35)
This buffer chamber C35) forms a cylinder (29)
The gas flow path (
31a).

Piston G [with] support member (G) and insulating cylinder f+, 6
) is fixedly supported on the inner wall of the tank (1υ.
37) is connected to an operation section (not shown) via an insulating rod (17). A conductor (19a) is connected to the support member (to). Also, one end of this support member (G) and the piston (To) are fixed, and one end of the outer support part assembly (C) is fixed to the fixed part of this piston G so as to surround the buffer part Q. , the other end of this outer support member (to) faces the shield (2ff) of the fixed electrode part α2, and the movable electrode part (
A rounded shield (2I) surrounding the outside of the electrode (21) is fixed, and the tip surface of the shield (21) on the fixed electrode part (121 side) is formed so as to almost match the tip of the movable electrode (30). Then, two mounting portions (22a) are attached, each of which has ends of a plurality of insulating rods (22) approximately equally spaced.

As shown in Figure 3, a structure in which a plurality of insulating rods (for example, four insulating rods) (two hot metals) are installed between the shield (2■, T21) is shown in Figure 3. Attach at equal intervals using the attachment parts (22a).Although not shown, the same applies to the shield (21) side.Fix to the inside of the shield (A) between the attachment parts (22a), that is, alternately with the attachment parts (22a). Current-carrying contacts (c) are provided. That is, in the figure, fixed current-carrying contacts (2) are arranged at four locations. The fixed current-carrying contacts (e) are formed by, for example, arranging finger-like contacts.

Further, the insulating rod (221) is made of, for example, synthetic resin such as epoxy resin or ceramic.

Next, the effects of the present invention will be explained. With the operation of the operating section (not shown), the insulating iron α and the operating rod (37) are moved between the movable electrode sections and the buffer section α on the movable side, that is, the cylinder C! 9) By driving in the opening direction, the fixed current-carrying contact (c) and the movable current-carrying contact (3)
21 is first opened, and then the fixed electrode (27) and the movable electrode (30) are opened, and the insulating gas compressed in the buffer chamber G is caused by the arc generated as the fixed electrode (27) and the movable electrode (30) are opened.
) and the insulating nozzle Cl1) through the gas flow path (31a).
The above arc is extinguished from the opening at the tip.

The fixed electrode part (121) and the movable electrode part (1) are fixed by two bend-resistant insulating rods (shorter than conventional ones), and the movable electrode part (121) is fixed to the inner wall of the tank (Ll). The electric field at the fixed and movable electrode parts (12+, It) is relaxed by the shields f20) and (21), and the distance between the two electrode parts can be made as short as possible.Furthermore, the fixed electrode part O
On the inner circumference of the shield (A) of No. 2, the fixed electrode portions (1
It is possible to reduce the diameter of the movable electric clover part 03) and, in turn, to reduce the size of the tongue 01).

〔Effect of the invention〕

As explained above, according to the buffer type breaker of the present invention, it is possible to reduce the diameter of the fixed electrode part, reduce the distance between the fixed and movable electrode parts, and reduce the withstand voltage between both electrode parts and the distance between the tank and the tank. Voltage resistance properties can be improved.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of the buffer type gas breaker of the present invention, FIG. 2 is a vertical cross-sectional view of the main part of FIG. 1, and FIG. 3 is the same as that of FIG. 1. -1 line arrow sectional view. I... Tank, (lla)... Insulating gas (17J... Fixed electrode part, (13)... Movable electrode part (L■... Buffer part, (161...
・Insulating tube (L7)...Insulating rod, (2(It)
, (2)...Shield (2)...Insulating rod,
(22a)...Mounting part Cω...Fixed current-carrying contact, (2e...Fixed electrode mounting member'(2'?)
... Fixed electrode, 0 ... Cylinder (3 (It ... Movable electrode, '(31) ... Insulated nozzle 0 ...
Movable current-carrying contact, (long...piston'0!9...buffer chamber, (7)...support member 0?)...-operation rod, (to)...outer support member agent patent attorney Shi Inoue - Male

Claims (1)

[Claims] A fixed electrode part, a movable electrode part facing the fixed electrode part, and a buffer part adjacent to the movable electrode part are housed inside the tank, and an insulating gas is filled therein, and the movable sides of the movable electrode part and the buffer part are connected to each other through an operating iron. in which a shield is provided on opposite sides of the fixed electrode part and the movable electrode part, and a plurality of insulating rods installed approximately equally spaced between the two shields are provided. The fixed electrode part is fixedly supported on the movable electrode part side, and the fixed side of the buffer part adjacent to the movable electrode part is fixed to the inner wall of the tank via an insulating member, and the fixed electrode part is fixedly supported on the movable electrode part side. fixed current-carrying contacts are arranged so as to be alternately and approximately equally spaced with the mounting portions of the insulating rods, and movable current-carrying contacts corresponding to the fixed current-carrying contacts are provided on the movable electrode portion. Buffer type gas breaker.