JPH0713148Y2 - One-touch protective cover for disconnector - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-touch protective cover used for covering a charged part of a disconnector during maintenance work or the like.

[0002]

2. Description of the Related Art The purpose of installing a disconnecting switch in a power substation or other power transmission and distribution circuits is to connect the power supply side (hereinafter referred to as the primary side) and the load side (hereinafter referred to as the secondary side) of the disconnecting switch. Opening the movable blade ensures reliable separation. Therefore, when performing various work related to the secondary side electric circuit, be sure to open this disconnector for safety. At this time, the terminals corresponding to the blade and the primary side and the circuits connected thereto are charged, and it is necessary to take an insulation measure so as to never contact these parts.
In implementing this insulation measure, the disconnector is often installed at a high place from the viewpoint of safety, so it is also important to consider the ease of insulation work.

Conventionally, measures have been taken to prevent a worker and tools from contacting the charging part by winding a rubber sheet around the charging part and stopping it with a clip.

[0004]

As described above, in the method of covering the primary side portion of the disconnector with the rubber sheet, the covered portion has a complicated shape including the blade, the blade supporting insulator and the primary terminal. Therefore, there is a problem in terms of safety that the insulating work takes time and labor, and the rubber sheet may fall off.

An object of the present invention is to provide a one-touch protective cover for a disconnector which can cover a charging part quickly, easily and surely.

[0006]

In order to achieve the above object, the lower end has an opening and has a diameter and a depth capable of crowning a blade of a disconnector and an insulator supporting the blade. Formed by a resilient insulating material, and the elasticity formed by protruding from the side surface of the tubular portion so as to cover the primary terminal connected to the blade of the disconnector. A cylindrical protrusion made of an insulating material, the center of the lower surface of the cylindrical surface of the cylindrical protrusion, and the cylindrical surface of the cylindrical portion connected to the lower surface of the cylindrical protrusion from the opening end of the cylindrical protrusion. A slit provided across the opening, and a pair of flanges formed to project outward from each of the cylindrical surfaces at the edge of the slit across the slit, and at the lower end of the cylindrical portion. Do not form the slit and the pair of flanges of the positioned portion by expanding them in a reverse wedge shape toward the lower end. It was a thing.

[0007]

With this structure, the above object can be achieved by the following operation according to the present invention. Cover the tubular part of the one-touch protective cover on the top of the receiving blade, apply the collar part opened in the shape of an inverted wedge to the primary terminal, and widen the slit so that the tubular part covers the receiving blade and its supporting insulator. Push the cylindrical protrusion so that it covers the primary terminal and cover it. The mounting operation is completed when the lower end opening of the tubular portion completely covers the base portion of the supporting insulator and the tubular protruding portion completely covers the primary terminal. At this time, in the elastic one-touch protection cover, the inner surface of the tubular portion is brought into close contact with the outer peripheral surface of the support insulator, and the slit is closed to hold the one-touch protection cover itself in that state. On the other hand, when the cylindrical protrusion is inserted into the primary terminal, the slit is closed by the elastic force of the one-touch protective cover itself. Therefore, it is not necessary to fix the one-touch protective cover using a special means.

Here, the pair of collars formed on the edges of the slits serves to prevent the risk of an operator or tools used by the workers coming into contact with the charging portion through the slits.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view of the embodiment, FIG. 2 (A) is an external view, FIG. 2 (B) is a mounting operation view in which the collar portion 2 is expanded, and FIG. 3 is a one-touch protective cover 50 of this embodiment is disconnected. It is an overall view showing the state where it was attached to a container. Note that the one-touch protection cover 50 of the embodiment is shown in cross section so that the inside can be seen. As shown in FIG. 3, the disconnector includes a blade 31, a primary terminal 32, a secondary terminal 34, a movable blade 37, and an insulator 33 that supports them. The insulator 33 is bolted to the disconnector base 36 to form a disconnector. The disconnector is attached to a required place by the disconnector base 36, and the movable blade 37 is opened and closed by the receiving blade 31 to separate or connect the primary side and the secondary side.
When performing various operations related to the electric circuit on the secondary side, this disconnector is always opened to completely separate it from the primary side.

As shown in FIGS. 1 to 3, the one-touch protection cover 50 supports the receiving blade 31 and the base portion of the insulator 33 supporting the receiving blade 31, the receiving blade 31 and the tubular portion 10. Primary terminal 3 formed substantially at right angles to the insulator 33
It is formed from a cylindrical protruding portion 20 that protrudes from the side surface of the cylindrical portion 10 so as to cover 2. Further, the slit 5 is provided from the lower surface of the opening end of the tubular protruding portion 20 to the lower end opening of the tubular portion 10. Further, a pair of flanges 2 is formed on the edge of the slit across the slit 5 so as to project outward from the tubular portion 10 and the tubular protruding portion 20. Further, a fold 4 is provided on the inner surface of the open end of the cylindrical protrusion 20. Synthetic rubber is preferable as the constituent material because it requires elasticity and insulating performance. However, the material may be natural rubber or a resin having elasticity. When the tubular portion 10 is attached, it is necessary that the tubular portion 10 be held in close contact with the outer peripheral surface of the support insulator 33 by its elasticity, and further attached in a posture with the lower end opening facing up as in the example of FIG. In many cases, the cylindrical part 1 should be considered so that it is in close contact even if it is installed from the bottom up.
The inner diameter dimension of 0 is preferably slightly smaller than the outer diameter dimension of the support insulator 33. The length of the tubular portion 10 can accommodate from the base of the support insulator 33 to the top of the receiving blade 31,
Moreover, it is preferable that there is a slight margin between the top of the receiving blade 31 and the inner surface of the lid of the tubular portion 10. On the other hand, the cylindrical projecting portion 20 covering the primary terminal 32 can be housed including the primary terminal 32, the circuit terminal connected to the primary terminal 32, and the mounting bolt.
The inner diameter and length of the base and opening are determined.

In order to reinforce the joint between the cylindrical portion 10 and the cylindrical protruding portion 20 and prevent the deformation of the entire shape, the cylindrical portion 10 and the cylindrical protruding portion 2
A rib 8 having a hole 9 is attached to the joint 0. Also, this rib 8 is a one-touch protective cover 5 from the disconnector.
Useful as a handle when removing 0.

In order to mount this, first, the disconnector is opened, and then the tubular portion 10 of the one-touch protective cover 50 is opened.
Holding the head of the head and connecting the collar part 2 that opens in the shape of an inverted wedge to the primary terminal 3
2 so that the slit 5 is widened so that the cylindrical portion 10
Covers the blade 31 of the disconnector and its supporting insulator 33 while pushing the cylindrical projection 20 so as to cover the primary terminal 32. The lower end opening of the tubular portion 10 is the support insulator 33.
The mounting work is completed when the base portion of the above is completely covered and the cylindrical projecting portion 20 is also covered with the primary terminal 32. At this time, in the elastic cover 50, the inner surface of the tubular portion 10 is brought into close contact with the outer peripheral surface of the support insulator 33, the slit 5 is closed, and the insulating cover 50 itself is held in that state. On the other hand, when the cylindrical protrusion 20 is inserted into the primary terminal 32, the slit 5 is closed by the elasticity of the insulating cover 50 itself. Therefore, it is not necessary to fix the one-touch protective cover 50 using a special means. Here, the pair of collars 2 formed at the edges of the slit 5 helps prevent the risk of an operator or tools used by the operator coming into contact with the charging portion through the slit 5.

When the primary side electric circuit of the disconnector is a bare conductor made of a round bar or the like, the primary side electric circuit is charged,
It is common to insulate this part during work. A flexible bellows-shaped insulating tube is used for this insulation, and a slit along the longitudinal direction is provided at one location of the tubular body for easy attachment / detachment. Flexible protection tubes (also called edging covers) are often used. In this case, the pleats 4 provided on the inner surface of the open end of the cylindrical protrusion 20 have the bellows-shaped flexible protection tube 35 for insulating the primary side electric path.
The one-touch protection cover 50 and the one-touch protection cover 50 are fitted easily and securely.

Also, since the cutout groove 3 is provided at four places on the lower end opening edge of the tubular portion 10, the one-touch protective cover 5 is provided.
0 does not hit the bolt of the disconnector base 36 and is securely inserted. Thus, the one-touch protective cover 50 of the present invention
By using, the work of insulating the live part of the disconnector is simple and reliable, and there is an effect that the time and labor required for the insulation measure can be reduced.

[0015]

As described above, according to the present invention,
Since the work to insulate the live part of the disconnector is easy and reliable by installing the one-touch protection cover, the time and effort required for insulation measures can be reduced, and it is even more effective in places with poor workability such as high places. There is.

As a result, the work of the original electric circuit can be performed safely and quickly.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 (A) is a view taken along the line IIA-IIA in FIG.
(B) is an operation explanatory view in which the collar portion is expanded from the slit portion for attachment.

FIG. 3 shows a state in which the embodiment of FIG. 1 is attached to a disconnector.

[Explanation of symbols]

 2 Collar part 3 Notch groove 4 Fold 5 Slit 8 Rib 9 Hole 10 Cylindrical part 20 Cylindrical protrusion part 31 Receiving blade 32 Primary terminal 33 Insulator 34 Secondary terminal 35 Bellows flexible protection tube 36 Disconnector base 37 Movable blade 50 One-touch protective cover

Claims (1)

[Scope of utility model registration request] 1. A resilient insulating material having a diameter and a depth capable of crowning a blade of a disconnector and an insulator for supporting the blade having an opening at a lower end. A tubular part,
A cylindrical protrusion made of an elastic insulating material that is formed by protruding from the side surface of the cylindrical portion so as to cover the primary terminal connected to the receiving blade of the disconnector, and the cylindrical protrusion. A slit provided in the center of the lower surface of the cylindrical surface and the cylindrical surface of the cylindrical portion continuous with the slit extending from the opening end of the cylindrical protruding portion to the lower end opening of the cylindrical portion, and the slit sandwiching this slit. A pair of flanges that are formed to project outward from each of the cylindrical surfaces at the edge of, and the slits of the portion located at the lower end of the cylindrical portion and the pair of flanges toward the lower end. One-touch protective cover for disconnectors, formed by spreading out in a reverse wedge shape.