JP2002176709A - Compound gas insulated switch gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compound gas insulated switch gear that is capable of securing excellent mechanical strength without increasing the dimensions of a supporting and insulating structure and that lowers cost and improves reliability while maintaining small size and light weight even when the insulating structure that stores the breaking part is positioned at one side of the supporting and insulating structure. SOLUTION: A reinforcing supporting and insulating structure 14 constituted in solid is mounted to a metal container 7 in addition to a supporting and insulating structure 8. The reinforcing supporting and insulating structure 14, which is on a plane that includes the center lines of the breaking part 1 and the supporting and insulating structure 8, is arranged below the breaking part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compound gas insulated switchgear in which an insulating structure for accommodating a cut-off portion and an insulating structure for accommodating a disconnection portion are fixedly held in a metal container. The present invention relates to a composite gas insulated switchgear having an improved support structure.

[0002]

2. Description of the Related Art Generally, the life of buses and towers in an air substation is long, so that there is little need to replace the buses and towers when replacing a switchgear. Therefore, it is desired to replace the switchgear with a high performance and high reliability while effectively using the air-insulated bus. As a switchgear meeting such needs, a composite gas insulated switchgear has attracted attention. A composite gas insulated switchgear is a device in which an insulating structure containing an interrupting portion and an insulating structure containing a disconnecting portion are attached to a metal container, and this metal container is attached to another insulating structure, that is, a supporting insulating structure. It is a device that supports and also has a drive operating device for driving a foundation breaking portion and a disconnecting portion at the base end of the supporting insulating structure, and generally has a structure in which the breaking portion and the disconnecting portion are electrically connected at the same time. It is a target.

[0003]

In the meantime, in the air circuit breaker 15 shown in FIG.
This is a switchgear of the type that is supported by a supporting insulating structure 17. In this conventional example, an insulating structure 16 for accommodating a cut-off portion is disposed on both sides of the supporting insulating structure 17 as viewed from the supporting insulating structure 17. In contrast to such an arrangement, in a composite gas insulated switchgear, a metal container is provided with a plurality of insulating structures, that is, an insulating structure for storing a cut-off portion and an insulating structure for storing a disconnection portion. When viewed from the supporting insulating structure that supports itself, the insulating structure for accommodating the blocking portion is located on one side. For this reason, when the force generated during the opening / closing operation of the cut-off portion is transmitted from the metal container to the supporting insulating structure, the force acts as a moment corresponding to the length of the supporting insulating structure, and the root of the supporting insulating structure. Acts intensively on parts. It is assumed that the acting force at this time exceeds the mechanical strength that satisfies the requirements for seismic performance.

In the air circuit breaker 15 described above, as shown in FIG.
Are attached, but this reinforcing support insulating structure 18 is provided.
Is only to meet the requirements for seismic performance. Therefore, it was impossible to apply such a conventional technique to a composite gas insulated switchgear. Therefore, in the conventional compound gas insulated switchgear, it is necessary to secure excellent mechanical strength higher than ordinary seismic performance, and the supporting insulating structure must be enlarged. As a result, problems such as an increase in the size of the entire switchgear and a rise in cost have been caused.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a support insulating structure in which an insulating structure accommodating a breaking portion is located on one side of a supporting insulating structure. It is an object of the present invention to provide a composite gas insulated switchgear that can secure excellent mechanical strength without increasing the size of a structure, reduce costs and improve reliability while reducing the size and weight.

[0006]

In order to achieve the above object, the present invention provides a metal container, in which an insulating structure containing a blocking portion and an insulating structure containing a disconnecting portion are fixed. A supporting and insulating structure for supporting the metal container is held, and a driving operation device for driving the blocking unit and the disconnecting unit is provided at a base end of the supporting and insulating structure. A drive insulating rod driven by the drive operation device is housed in the insulating structure,
A drive connection portion is housed in the metal container, the drive insulating rod is connected to one end of the drive connection portion, and the blocking portion or the disconnection portion is connected to the other end, respectively, the metal container; The composite gas insulated switchgear in which an insulating gas is sealed in the insulating structure and the supporting insulating structure has the following technical features.

That is, according to the first aspect of the present invention, a reinforcing supporting insulating structure is attached to the metal container in addition to the supporting insulating structure, and the reinforcing supporting insulating structure includes the blocking portion and the reinforcing member. It is arranged on a plane including the center line of each supporting insulating structure, below the blocking portion, or on the opposite side of the space below the blocking portion across the supporting insulating structure, or both. It is characterized by. According to the invention of claim 1 described above, by using the supporting insulating structure for reinforcement together with the supporting insulating structure,
The metal container can be reliably supported. At this time, since the reinforcing supporting insulating structure is located below the interrupting portion, or on the opposite side of the supporting insulating structure in the space below the interrupting portion, or both, the force generated during operation of the interrupting portion is obtained. Will not be concentrated on a single supporting insulating structure, but will be distributed over multiple supporting insulating structures. Therefore, excellent mechanical strength can be easily secured without increasing the size of the supporting insulating structure.

According to a second aspect of the present invention, in the composite gas insulated switchgear according to the first aspect, the reinforcing supporting insulating structure is solid. According to the second aspect of the present invention, since the reinforcing supporting insulating structure is made solid, it is possible to reduce the size while securing excellent mechanical strength as compared with the case where the supporting insulating structure is hollow. Can be realized.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) Representative Embodiment [Configuration] Hereinafter, a typical embodiment of a combined gas insulated switchgear according to the present invention will be described with reference to FIGS. This will be described specifically. This embodiment includes claims 1 and 2.

First, the overall configuration of the present embodiment will be described. As shown in FIG. 1, a metal container 7 having a hexagonal cross section is provided in the present embodiment, and insulating structures 3 and 4 are radially extended and fixedly held on the upper surface of the metal container 7. ing. The insulating unit 3 houses the cutoff unit 1,
The disconnecting section 2 is housed in the insulating structure 4. Further, a supporting insulating structure 8 for supporting the metal container 7 itself is attached to a lower surface portion of the metal container 7. Further, rotatable drive connecting portions 5 and 6 are accommodated in the metal container 7. The drive connection part 5 is connected to the cutoff part 1 in the insulating structure 3, and the drive connection part 6 is connected to the disconnection part 2 in the insulation structure 4.

A storage box 13 is provided at the base end of the supporting insulating structure 8.
Are arranged therein, and a breaker drive operating device 12 for driving the breaker 1 and a disconnector drive operating device 11 for driving the disconnector 2 are accommodated therein. In addition, driving insulating rods 9 and 10 driven by the driving operation devices 11 and 12 are accommodated in the supporting insulating structure 8. The drive connecting portion 6 is connected to the distal end portion of the drive insulating rod 9, and the drive connecting portion 5 is connected to the distal end portion of the drive insulating bar 10. The driving force direction of the driving insulating rod 9 is changed and transmitted to the disconnecting portion 2 and the breaking portion 1. An insulating gas is sealed in the metal container 7, the insulating structures 2, 3, and the supporting insulating structure 8.

As described above, the present embodiment is characterized in that the supporting insulating structure 8 is provided on the lower surface of the metal container 7.
In addition to the above, a solid support insulating structure 14 for reinforcement is attached. This reinforcing supporting insulating structure 14
Has an upper end mechanically connected to the metal container 7, and a lower end mechanically connected to a support base 19 extending horizontally from the storage box 13. And below the blocking unit 1.

[Operation and Effect] The operation and effect of the present embodiment configured as described above are as follows. That is,
When an operation of opening the contact point of the interrupting unit 1 is performed by the interrupting unit operating device 12, a downward force is generated along the longitudinal direction of the interrupting unit 1 with the operation of the interrupting unit 1, and this force is generated by the drive connecting unit 5.
From the metal container 7 to the supporting and insulating structure 8 via. At this time, since the reinforcing supporting insulating structure 14 is located on a plane including the center line of each of the blocking portion 1 and the supporting insulating structure 8, the above-described force is generated not only on the supporting insulating structure 8 side but also on the reinforcing supporting insulating structure 8. It also acts reliably on the insulating structure 14.

That is, the force generated by the operation of the cut-off section 1 is distributed and transmitted to the supporting insulating structure 8 side and the reinforcing insulating structure 14 side, and when the reinforcing insulating structure 14 is stretched, It is possible to avoid that all of the bending moment corresponding to the length of the supporting insulating structure 8 acts only on the base portion of the supporting insulating structure 8. In addition, since the reinforcing insulating structure 14 is solid, it is easy to reduce the size while ensuring excellent mechanical strength as compared with a hollow structure. According to the present embodiment as described above, even if the insulating structure 3 accommodating the blocking unit 1 is a composite gas insulated switchgear arranged on one side of the supporting insulating structure 8, the supporting insulating structure 8 It is possible to secure an excellent mechanical strength enough to satisfy the demands for normal seismic performance, while avoiding an increase in the size. As a result, the size and weight of the device can be reduced, and at the same time, the cost can be reduced and the reliability can be further improved.

(2) Other Embodiments The present invention is not limited to the above-described embodiments. Regarding the arrangement of the reinforcing supporting and insulating structure 14, the space below the blocking portion 1 It is arranged on the opposite side of the supporting insulating structure 8 (see FIG. 2), or both below the blocking unit 1 and on the opposite side of the supporting insulating structure 8 (see FIG. 3).
May be arranged. In the former case, the force (upward along the longitudinal direction of the breaking portion 1) generated when the contact of the breaking portion 1 is closed is reduced by the force generated when the contact of the breaking portion 1 is opened (the breaking portion 1).
(Downward along the longitudinal direction). In the latter case, even if the opening force of the blocking portion 1 is large or the closing force is large, in any case, one of the reinforcing supporting insulating structures 14 is always stretched so that the supporting insulating structures 8 Can be prevented from acting.

[0016]

As described above, according to the composite gas insulated switchgear according to the present invention, the reinforcing supporting insulating structure located on a plane including the center line of each of the interrupting portion and the supporting insulating structure can be formed by: Extremely simple structure, such as mounting on a metal container, ensures excellent mechanical strength without increasing the size of the supporting insulating structure, even when the insulating structure that houses the cutoff is located on one side of the supporting insulating structure. Further, it is possible to reduce the cost and improve the reliability while reducing the size and weight of the device.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a typical embodiment of a combined gas-insulated switchgear according to the present invention.

FIG. 2 is a configuration diagram of another embodiment of the combined gas-insulated switchgear according to the present invention.

FIG. 3 is a configuration diagram of another embodiment of the combined gas-insulated switchgear according to the present invention.

FIG. 4 is a front view of a conventional air circuit breaker.

FIG. 5 is a side view of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cut-off part 2 ... Disconnect part 3, 4 ... Insulated structure 5, 6 ... Drive connection part 7 ... Metal container 8 ... Support insulating structure 9, 10 ... Driving insulating rod 11 ... Disconnect part drive operating device 12 ... Breaking section drive operation device 13 ... Storage box 14 ... Support insulating structure for reinforcement 19 ... Support base

Continued on the front page (72) Inventor Akio Kobayashi 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Toshiba Substation Equipment Technology Co., Ltd. (72) Inventor Yoshiaki Amida 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture No. 2 Inventor Hirokazu Takagi 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture F-term (reference) 5G017 AA11 HH01 5G028 GG24

Claims (2)

[Claims] A metal container is provided, in which an insulating structure accommodating an interrupting portion and an insulating structure accommodating a disconnecting portion are fixed and held, and a supporting insulating member for supporting the metal container itself. A structure is attached, and a drive operating device for driving the blocking portion and the disconnecting portion is provided at a base end of the support insulating structure, and a drive driven by the drive operation device is provided in the support insulating structure. A drive connecting portion is housed in the metal container, the drive insulating bar is provided at one end of the drive connecting portion, and the blocking portion or the disconnecting portion is provided at the other end. A composite gas insulated switchgear connected to the metal container, the insulating structure and the supporting insulating structure, wherein an insulating gas is filled in the metal container; the metal container has a reinforcing insulating support in addition to the supporting insulating structure; When the structure is attached The reinforcing supporting insulating structure is provided on a plane including a center line of each of the blocking portion and the supporting insulating structure, and is provided below the blocking portion or in a space below the blocking portion. A combined gas-insulated switchgear, characterized in that it is arranged on the opposite side of an object or on both sides. 2. The composite gas insulated switchgear according to claim 1, wherein the reinforcing insulating structure is solid.