JPH0314900Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a protection device for a pipeline conductor used in a gas-insulated switchgear during transportation.

[Background technology and problems] In recent electrical equipment, SF 6, which has insulation performance, has been used from the viewpoints of reducing the size of the construction site, harmonizing with the environment with a focus on noise, aesthetics, and safety, and saving labor in maintenance and inspection _.
Gas insulated switchgear (GIS) using gas
is used.

For example, in GIS, substation equipment other than transformers, such as circuit breakers, disconnectors, current transformers, and potential transformers, is housed in a metal container, and the above-mentioned SF ₆ is placed in that space.
It is filled with gas.

Figure 5 shows an example of a three-phase integrated GIS. In the figure, GCB is a gas circuit breaker, DS is a disconnector, ESW is a grounding device, BUS is a busbar, CHd is a cable connection, and G is a current transformer.

As shown in the figure, for example, DS and ESW are connected by a conduit P containing a conductor C.

This kind of GIS transportation has restrictions on the overall length, height, width, etc., so naturally it must be transported as a transportable unit and reassembled on site.

The conduit P containing the conductor is also divided and transported as required, but normally, as shown in FIG. Since it is often held within the channel 2, if it is transported as it is, the insulating spacer 1 made of epoxy or the like will be subjected to shock due to excessive vibration. Furthermore, the mounting bolts 7 of the conductor 3 also become loose.

For this reason, a method is adopted in which the internal conductor 3 is removed and transported.

However, removing up to the internal conductor 3 requires a large amount of time for reassembly on site, which is something that should be avoided.

[Means for Solving the Problems] The present invention has a structure in which a pipe is provided at one end of the pipe so that a pipe conductor having a conductor supported by a cantilever inside the pipe can be transported without being damaged during transportation as described above. A protective cover equipped with a steady rest metal fitting is attached, and a conductor is engaged with the steady rest metal fitting to prevent vibration during transportation.

FIG. 1 and FIG. 2 both show embodiments for single-conductor conduit conductors.

In Figure 1, as already explained in part,
1 is an insulating spacer. 2 is a conduit, and 3 is a conductor. The conductor 3 is fixed to the conductor passing through the insulating spacer 1 by bolts 7. The insulating spacer 1 to which the conductor 3 is fixed is fixed at the flange surface of one end of the conduit.

Reference numeral 4 denotes a protective cover, on one side of which a steadying metal fitting 5 is attached with bolts 6. The swing stopper 5 is designed to have a structure that holds the tip of the conductor 3 without vibration.

The anti-shaking fitting 5 of the protective cover 4 is engaged with the tip of the internal conductor 3, and the end flange 8 of the conduit 2 is
Vibration of the conductor 3 can be prevented by aligning the peripheral edge of the protective cover 4 and connecting them with bolts and nuts, for example.

If the conductor 3 is shorter than the end of the conduit 2,
The steady rest fitting 5 may be made to protrude inward from the protective cover 4, or, although not shown, the protective cover 4 may be made to protrude into the conduit 2 in the shape of a silk hat, and the steady rest fitting 5 may be fixed to this. good.

In the embodiment shown in FIG.
This is an example used when protruding outward from the end of. In this case, the protective cover 4 is shaped like a silk hat.
A device with a swing stopper 5 on the inside of the top is prepared. Although the above has been carried out for a single conductor, it can be carried out similarly for a multi-conductor conduit conductor.

Figures 3 and 4 show the swing stopper. conductor 3
The end of the holder usually defines its electrical contact surface and is joined with the contact of the corresponding conductor before being attached to the steady stop fitting 5.
When engaged, it is necessary to consider the engagement surface with the swing stop metal fitting 5 so that the surface that will later become the contact surface is roughened and scratched by the engagement of the swing stop metal fitting. In FIGS. 3 and 4, the reduced diameter portion a at the tip of the conductor 3 is the electrical contact surface, and when engaging with the swing stop metal fitting 5, the swing stop metal fitting 5 comes into contact with this contact surface a. In order to prevent this, in the case shown in FIG. 3, the swing stop metal fitting 5 has a shape with a protrusion 11 at its tip so that the swing stop metal fitting 5 engages with the hollow portion 10 of the conductor 3.

In addition, in the case shown in FIG. 4, the swing stop metal fitting 5 fits into the large diameter portion of the conductor so that the swing stop metal fitting 5 engages with the large diameter portion of the conductor 3, and the tip of the narrow diameter portion. It is best to use one having a pot-shaped shape 12 that leaves ample space to prevent contact with the swing stopper 5.

[Effect] As explained above, in the present invention, a protective cover equipped with a steady rest metal fitting is used, and the end of the conductor is engaged with the steady rest metal fitting to fix this protective cover to the end of the conduit. Therefore, the conductor becomes supported at two places, and has the following effects.

(1) During transportation, the impact on internal conductor attachment parts such as insulating spacers made of epoxy etc. is reduced.

(2) It is possible to prevent excessive loads from being applied to bolts due to impact and prevent bolts from loosening.

(3) Since it can be transported without removing the internal conductor, on-site assembly time can be shortened.

(4) The protective cover can be shared, contributing to dustproofing and waterproofing until on-site assembly.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention. Third
Figures 4 and 4 show steady rest fittings. Figure 5 is GIS
FIG. 1... Spacer, 2... Conduit, 3... Conductor, 4
...Protective cover, 5... Steady rest metal fittings.

Claims (1)

[Scope of utility model registration request] Consisting of a conduit, a conductor cantilevered by an insulating spacer, and a protective cover equipped with a swing stopper, the conductor is housed in the conduit, and the insulating spacer is fixed to a flange surface at one end of the conduit. death,
A protection device for a conduit conductor during transportation, wherein the protective cover is fixed to a flange surface of the other end of the conduit in a state in which the conductor and a swing stopper are engaged with each other.