JPH0260403A - Gas insulation switchgear - Google Patents

Abstract

PURPOSE:To reduce vibration by planting a plurality of supports, penetrating through the upper slab, onto the lower slab of a building, while separating each other then mounting a common base thereon and securing the common base thereto thereafter mounting and securing a gas insulation switchgear integrally onto the common base through resilient supports. CONSTITUTION:A plurality of supports 7 are planted and secured vertically onto the slab of first floor in a building. The supports 7 are separated one another where one ends thereof penetrate through through-holes 8a made through the slab of second floor. A resilient body 9 is mounted in a gap between the through-hole 8a and the support 7. A common base 10 is mounted on the supports 7 at the second floor and secured thereto, and a base 12 is arranged to face with the common base 10 through a plurality of resilient support 11. A gas insulation switchgear 14 comprising a gas insulation circuit breaker 13 and the like is mounted integrally on the base 12 secured thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a gas-insulated switchgear for underground substations that reduces vibration transmission.

(Prior Art) Generally, a gas insulated switchgear is configured by connecting gas insulated equipment such as a gas circuit breaker. Due to increased capacity of devices and restrictions on installation locations due to increased demand for electric power, large gas insulated switchgears have come to be installed in the basements of buildings.

Furthermore, as gas circuit breakers increase in capacity, they are required to operate at higher speeds. Therefore, when the gas circuit breaker operates, large operational vibrations are generated, and this operational vibration is transmitted to the building. The transmission of this vibration causes adverse effects such as malfunction of neighboring devices.

Therefore, it is necessary to reduce the operational vibration of the gas circuit breaker itself or to limit the vibration transmission path.

However, the former method cannot be realized due to current limitations in the breaking performance of the gas circuit breaker, and the latter method is exclusively used.

Here, a conventionally used method will be explained using FIG. 3. That is, a gas insulated switchgear 2 including a gas circuit breaker 1 and the like is placed all together on a base 3. Furthermore, this base 3 is mounted and fixed on a building floor 5 via a plurality of elastic supports 4.

With this configuration, the operational vibration generated by the cass breaker is reduced to several minutes and transmitted to the building floor 5. As a result, the adverse effects on the gas circuit breaker and adjacent equipment are reduced.

Vibration Theory - 1 - By weakening the rigidity of the elastic support 4, it is possible to lower the natural frequency of the vibration system and reduce the vibration transmissibility.

However, in this case, when assembling the cass insulation switchgear 2, much effort and time are required for on-site adjustment of each device. In addition, the gas insulated switchgear 2 when operating the "Cass circuit breaker"
The amplitude of increases. Furthermore, the vibration amplification ratio, that is, the response magnification during an earthquake, increases.

Since the vibration transmission rate is determined in consideration of such things, it is necessary to reduce the vibration transmission to a predetermined value.

(Problem to be solved by the invention) As described above, the conventional gas-insulated switchgear is mounted and fixed on the building floor only via the base and elastic support, so there is a limit to the reduction of vibration transmission. .

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a gas insulated switchgear for underground substations in which vibration transmission is reduced.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a plurality of supports passing through the upper floors on the lower floors of the building.
lt ti5 and fixedly established, a through base is placed and fixed on this support, and the insulated switchgear is collectively placed and fixed on this common base -I- via an elastic support.

(Function) With this configuration, the vibration of the cass insulation switchgear is transmitted via the elastic support and the support, so it can be sufficiently reduced.

(Example) An embodiment of the present invention will be described below with reference to FIG.

That is, on the floor 6 of the first floor in the building, a plurality of supports 7 are fixed directly to the buttons. Each of the supports 7 is spaced apart from each other, and one end passes through a through hole 8a provided in a floor 8 of a second floor located above the first floor. This through hole 8
An elastic body 9 is installed in the gap between a and the support body 7.

Also, on the support 7 located on the second floor there is a common base]
0 is placed and fixed. In addition, common base 10”-
Bases 2 are disposed opposite to each other with a plurality of elastic supports 11 interposed therebetween.

Further, an insulated switchgear 14 including a gas circuit breaker 13 and the like is mounted and fixed on the base 12.

Next, the effects of the configuration of this embodiment will be explained. As a result of quantitative investigation and study of the transmission of operation vibration in this configuration, it was found that the following formula (1) holds true.

Here, Go: Floor vibration acceleration on the floor where the gas insulated switchgear is installed G Floor vibration acceleration on the nth floor above the floor where the gas insulated switchgear is installed n: Difference between floors: Constant (#3) (]) It is clear from the equation As a result, gas insulated switchgear is reduced to a target.

The reason for this is thought to be that the vibrations transmitted to the pillars of the building are dispersed by the slab and transmitted to the upper floors, dispersing the vibration energy.

Further, since the elastic body 9 is installed between the through hole 8a and the support body 7, vibration of the gas insulated switchgear 14 during an earthquake is reduced.

Incidentally, as shown in FIG. 2, by setting the floor on which the support body 7 is fixed to a floor two or more below the floor on which the gas insulated switchgear 14 is installed, vibration reduction is further promoted.

〔Effect of the invention〕

As explained below, in the present invention, a plurality of supports penetrating the two-story floor are established and fixed at a distance on the lower floor of the building, and a common base is placed on the two supports. To provide a gas insulated switchgear in which vibrations generated during operation can be reduced by the elastic support and the support, since the gas insulated switchgear is collectively mounted and fixed on the common base via the elastic support. be able to.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a cass insulation switchgear showing an embodiment of the present invention, FIG. 2 is a schematic diagram of a cass insulation switchgear according to another embodiment of the invention, and FIG. 3 is a conventional It is a schematic block diagram showing the closing device r between the cass insulation. C) First floor floor, 7...Support, 8...Second floor floor, 8a. Member: Through hole! ] Elastic body, 10
・Common base, 11 elastic support, 12 base, 1 Nido gas circuit breaker, j4・Gas insulated switchgear. Agent Patent Attorney Noriyuki Chika Yudo Ken Daishimaru

Claims (1)

[Claims] In a gas insulated switchgear installed on a base in a multi-story building, a plurality of supports penetrating the upper floor are erected and fixed at a distance on the lower floor of the building,
A gas insulated switchgear comprising a common base placed and fixed on the upper floor support, and the base placed and fixed on the common base via a plurality of elastic supports.