JPH0136260Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grounding device useful for application to disconnectors used in snowy areas, and particularly to a snow cover with a simple structure.

In general, a grounding device for a disconnector performs a grounding operation by raising and lowering a blade or vertically raising and lowering the blade to contact and grip a contact disposed on the upper part of the disconnector, or to separate it from the contact.

However, the standard requires that disconnectors be visually visible in their opened and closed states.

Therefore, in conventional grounding devices, the movable electrode blade and the fixed electrode are exposed.

However, if it is left exposed, it may become impossible to open or close due to heavy snowfall.

The present invention has been made in view of such prior art.

Therefore, the purpose of the present invention is to provide a grounding device with a simple structure that prevents snow from accumulating on the blades. In a grounding device equipped with a blade that expands and contracts to perform attachment/detachment operations, the lower part of the column through which the blade can penetrate is attached to the upper part of the operating mechanism box, and the cover support fixed to the upper part of the column has a vertically divided section. Each lower part of a snow cover having a slope at the upper part is rotatably attached, and the snow cover is configured to be pushed and expanded when the blade extends through the inside of the snow cover. A return pin is installed, and a spring that applies force in the direction of closing the snow cover is suspended on the inner surface of the snow cover, and a return lever is fixed to the inner surface of the snow cover at a position where the return pin hits from above when the blade is in a lowered state. The contact is characterized in that a snow door is rotatably attached to the lower opening of the case housing the upper contact portion together with a return spring.

Before explaining in detail the embodiments of the present invention, an outline of a disconnector to which this is applied will be explained. As shown in FIG. 1, a pedestal 1 is installed on the ground.
A base 2 is fixed to its upper end. A support insulator 4 having a terminal block 3 fixed thereto is fixed to the upper end of the base 2. The external wire 5 electrically connects the terminal block 3 and a load-side device (not shown).

Next, embodiments of the present invention will be described in detail based on FIG. 2 and subsequent figures.

A contact 6 fixed to the terminal block 3 and having the same potential as the conductive part of the disconnector is adapted to grip the tip of the blade 7.

The lower part of the blade 7 is supported by an operating mechanism box 8 attached to the side of the pedestal 1.
An arbitrary expansion/contraction mechanism provided therein performs an expansion/contraction operation in the vertical direction to attach/detach the contacts 6. A support 9 through which the blade 7 can pass is provided outside the blade 7, and a lower part of the support 9 is attached to the upper surface of the operating mechanism box 8.

Further, a snow cover 11 is attached to the upper part of the support column 9 via a cover support 10, and the support column 9 is arranged so that the tip of the blade 7 is accommodated in the snow cover 11 when the blade 7 is in the contracted position. The length has been selected.

This support column 9 is held on the frame 1 by a support support 9a.

The snow cover 11 is divided in the vertical direction, and the upper end of the snow cover 11 is divided into parts in the vertical direction, and the upper end of the snow cover 11 is divided into two parts.
It is designed so that it can be pushed and expanded by the tip of the.

FIG. 3 is an enlarged sectional view of the snow cover 11 portion.

The snow cover 11 is divided into two parts 11a and 11b, and is rotatably attached to the cover support 10 by a hinge provided on the inner surface of the lower part. The cover support 10 is fixed to the upper part of the support column 9, and
Its inner surface is provided with a hole through which the telescopic blade 7 can pass.

The snow covers 11a and 11b have slopes at the top, and one of the snow covers 11b is provided with a roof 11c that covers the top of the divided surface. Furthermore, rollers 13 are provided inside the slope to facilitate the passage of the blade 7.

A spring 14 is suspended on the inner surface of each snow cover 11a, 11b to apply a force in the closing direction, and a return lever 11d, 11e is fixed to the snow cover 11a, 11b.
A pin 7a is installed at a position that contacts d and 11e from above.

Inside the snow cover 11, a heater 15 is installed at the bottom.
Further, a panel heater 16 is attached to the inner surface of the slope portion.

FIG. 4 is an enlarged sectional view of the contact 6 portion. A snow door 19 is rotatably attached to the lower opening of the case 18 that accommodates the upper contact portion 17. Here, 20 is a return spring.

In such a configuration, the snow covers 11a and 11b, which always cover and close the upper part of the blade 7 by the spring 14, are pushed and spread by the tip of the blade 7 which is being expanded via the roller 13.

Conversely, when the blade 7 completes its downward movement, the return pin 7a of the blade 7 moves to the return levers 11d and 11e.
Push down to close the snow protection covers 11a and 11b.
In addition, the force of the spring 14 causes the snow cover 11a and the 1
1b is maintained closed, and its dividing line is roof 1
covered by 1c.

Snow that collects on the slopes of the snow covers 11a and 11b slides down the slopes. Further, ice and snow frozen on the slope can be melted and dropped by the panel heater 16. Furthermore, the heater 15 prevents the inside of the snow cover 11 from freezing. On the other hand, a snow door 19 prevents snow and freezing rain from entering the upper contact 6 portion.

As specifically explained above with the examples,
According to the present invention, snow protection can be achieved sufficiently, so that it can be applied to a disconnect switch used in snowy areas, and the function of the grounding device can be fully demonstrated.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an outline of a disconnector and the positional relationship of a grounding device according to an embodiment of the present invention with respect to the disconnector, FIG. 2 is an explanatory diagram showing an embodiment of the present invention, and FIG. FIG. 4 is an enlarged sectional view of the snow cover portion, and FIG. 4 is an enlarged sectional view of the contact portion. In the figure, 4 is a support insulator, 6 is a contact,
7 is a blade, 7a is a return pin, 8 is an operation mechanism box, 9 is a column, 10 is a cover support, 11, 11
11 is a snow cover, 11d and 11e are return levers, 14 is a spring, 17 is an upper contact portion, 18 is a case, 19 is a snow door, and 20 is a return spring.

Claims (1)

[Scope of utility model registration request] In a grounding device that is provided with a blade that is installed on the upper part of the support insulator and that extends and contracts in the vertical direction to connect and disconnect the contact that is at the same potential as the conductive part of the disconnector, the lower part of the support that the blade can penetrate is connected to the operating mechanism. Each lower part of a snow protection cover that is divided vertically and has a slope at the top is rotatably attached to the cover support that is attached to the top of the box and fixed to the top of the support, and the snow protection cover is provided with a structure that penetrates through the inside of the snow protection cover. The snow cover is configured so that it is pushed out when the blade extends, and a return pin is installed in the blade, and a spring that applies force in the direction of closing the snow cover is suspended on the inner surface of the snow cover. The return lever is fixed to the inner surface of the snow cover at a position where the return pin hits from above in the lowered state, and the snow cover is rotatable with a return spring in the lower opening of the case that accommodates the upper contact part in the contact. A snow protection cover for a grounding device, which is characterized by being attached.