JPS6042422Y2 - Shiya disconnector - Google Patents

Description

[Detailed explanation of the invention] This invention is a switchgear that automatically opens three-phase power transmission and distribution lines.

In other words, the present invention relates to an improvement of a housing in a circuit breaker, in particular, housing an operating mechanism for operating a circuit breaker main body.

In general, the operating mechanism for simultaneously operating three-phase circuit breakers, especially in the case of circuit breakers installed outdoors, is to operate multiple circuit breaker bodies 1 at predetermined intervals as shown in Figure 1 for waterproof, dustproof, and soundproofing. The housing 4 is housed inside a housing 4 attached to an end of a pedestal 2 placed in an upright position, for example, outside the outermost end of a plurality of legs 3.

Since the housing 4 accommodates the operating mechanism 5 of the circuit breaker as well as control electrical equipment and an air or gas compressor, the volume of the housing 4 is considerably large. 4 is attached to the end of the pedestal 2 as described above, not only does the breaker itself become extremely large, but also the packaging and transportation costs become expensive.

In addition, this housing 4 does not have any reinforcing elements for the pedestal 2 due to its arrangement, and the vibration of the pedestal 2 during the cut-off operation is doubled and transmitted to the housing 4. There are also drawbacks that have a negative impact on

Furthermore, in order to provide a stable earthquake-resistant structure for the pedestal 2 that supports the plurality of breaker bodies 1 and the housing 4 that houses various devices, which are quite heavy, the materials must be extremely large and expensive. This is the cause.

This invention was made with attention to these points, and aims to provide a breaker that can be manufactured at a low cost, has an excellent earthquake-resistant structure, and has a smaller pedestal on which multiple breaker bodies are mounted. It is something.

That is, FIGS. 2 and 3 both show an embodiment of this invention, and reference numeral 6 denotes a pedestal on which a plurality of breaker bodies 1 are placed upright at predetermined intervals, and this pedestal At both ends of 6 are a pair of legs made of a frame made of shaped steel? A, 7b are provided, and a leg portion 7c having a hollow chamber 8 which also serves as a housing is formed in the intermediate portion of the pedestal 6, and a breaker operating mechanism 5 is provided in the hollow chamber 8.
Although not shown, electrical equipment for control, an air or gas compressor, etc. are housed therein.

As shown in FIG.
A pair of covers 11a and 11b are attached to the leg wall by hinges 10 so as to be openable and closable, and a plurality of ports 12 fix the free end portions of the double force bars to the leg wall 9a.

13゛ is compressed air or SF for extinguishing the breaker arc generated during the circuit breaker operation of the switchgear in the breaker body 1
This is a tank that stores gas, etc.

As described above, the circuit breaker of this invention has a hollow chamber 8 formed in at least one of the plurality of legs 7a, 7b, and 7c of the pedestal 6, so that it can also serve as a housing with a large cross-sectional area. Therefore, the rigidity of the legs is significantly improved, which greatly contributes to reinforcing the pedestal 6.

In addition, since the lower end of the leg 7c, which also serves as a housing for housing the control electrical equipment, is fixed to the ground, the vibration of the pedestal 6 during the cutoff operation is transmitted to the internal control electrical equipment, adversely affecting them. Also, vibrations of the compressor or the like inside the hollow chamber 8 are not transmitted to the outside and cause noise.

In addition, since the leg portion 7c having the hollow chamber 8 supports most of the weight of the entire breaker, other leg portions may be used. A and 7b may be of a supplementary level of strength, and contribute to making the pedestal 6 lighter and smaller, as well as reducing the cost of the breaker.

Furthermore, since the leg portion 7c at the center of the pedestal 6 is also used as a housing, the hollow chamber 8 of this leg portion 7c
Loads in the longitudinal direction due to the operating force of the operating mechanism 5 of the breaker housed within the breaker are mutually canceled out, and there is also the effect that no bending stress is applied to the entire breaker.

In addition, according to this invention, the legs of the pedestal 6 are also used as a housing for storing equipment, so the overall size of the breaker can be reduced, which not only reduces the installation space but also reduces packaging costs and This also contributes to reducing transportation costs.

In the embodiment described above, the leg portion 7c which also serves as a housing is connected to a pair of leg walls 9a as shown in FIG.
, 9b and a pair of covers 11a and 11b that can be opened and closed, but the cover may be a single cover, and the leg walls may be bent as appropriate by press bending or welding of a suitable thin metal plate. It goes without saying that by machining, the leg portions 7c can be formed at low cost and with high rigidity.

[Brief explanation of the drawing]

Figure 1 is a front view showing a conventional circuit breaker, Figures 2 and 3 each show an embodiment of this invention, Figure 2 is a front view, and Figure 3 is a front view of Figure 2. It is a sectional view taken along the line -■. In the drawing, 1 is the breaker main body, 5 is the operating mechanism, 6 is the pedestal,
7a and 7b are leg parts, 7c is a leg part that also serves as a housing,
8 is a hollow chamber, 9a and 9b are leg walls, and 11a and llb are covers. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (3)

[Scope of utility model registration request] (1) A breaker characterized in that a hollow chamber housing a breaker operating mechanism is formed in the leg of a pedestal on which the breaker main body is mounted, and the breaker main body is supported in the hollow chamber. (2) The circuit breaker according to claim 1, which is a registered utility model, characterized in that a hollow chamber is formed in at least one of the plurality of legs supporting the pedestal. (3) The circuit breaker according to claim 1, wherein the hollow chamber is constituted by a leg wall made of plate material and a cover.