KR20170006498A

KR20170006498A - Cut-out switch

Info

Publication number: KR20170006498A
Application number: KR1020150097177A
Authority: KR
Inventors: 유정훈; 신영신; 김재홍
Original assignee: 한국전력공사
Priority date: 2015-07-08
Filing date: 2015-07-08
Publication date: 2017-01-18

Abstract

The present invention relates to a cutout switch. To this end, the cutout switch according to the present invention includes a lower tube whose upper side is opened; a fuse which is combined with the lower side of the lower tube; an upper tube whose lower side is opened to be combined with the upper side of the lower tube and which includes an operating ring on one side thereof; and a restoring spring which is arranged inside the lower tube. The upper tube slides along the outer circumference of the lower tube in a longitudinal direction. Accordingly, the present invention can prevent a fault due to damage to a combination insulator.

Description

Cut-out switch {CUT-OUT SWITCH}

The present invention relates to a cut-out switch, and more particularly, to a cut-out switch capable of reducing the impact strength of a coupling insulator by dispersing an external force generated upon inputting and opening.

Generally, the cut-out switch of the pneumatic transformer represents a transformer protection device installed in the electric flow path of the mains power line and the pillar-type transformer to cut off power in an emergency. This cut-out switch is equipped with a fuse that protects the transformer from overloads and lightning, to prevent breakdown of the power line.

The cut-out switch can be opened and closed in such a manner that the operating ring of the operating rod of the upper fixing portion of the cut-out holder is coupled to the upper body of the cut-out switch by utilizing the operating rod. Here, the opening principle of the cut-out switch is such that when the fuse of the inner fuse barrel installed in the holder of the cut-out switch is fused, the tension of the flipper of the fuse lower fixing portion is relaxed and released by gravity.

However, when the cut-out switch (COS) is inserted and opened, there arises a problem of breakage of the fasteners due to the degree of insertion of the operating rod. As a result, there is a secondary safety accident due to the failure of the distribution line and the fall of the cut-out switch.

In addition, when the cut-out switch is newly installed, breakage occurs when the bolts are fastened to the COS body and the joint connecting part, or breakage due to external force is gradually increased when the cut-out switch is opened or opened. This is because, after installation of the cut-out switch, the load applied to the polymer bond insulator is increased due to the load of the cut-out switch and the leverage of the operating rod when the operator is put in and out.

Korean Registered Utility Model No. 0462948 (Name: Hook type high pressure cutout switch fuse holder)

The present invention relates to a cut-out switch which can reduce the impact strength of an engaging insulator by dispersing a force of an external force generated when a cut-out switch is inserted and released, thereby preventing breakdown of the engaging insulator, The purpose is to provide.

According to an aspect of the present invention, there is provided a cut-out switch including: a lower tube having an upper opening; A fuse coupled to a lower surface of the lower tube; An upper pipe connected to an upper side of the lower tube and having an operation ring coupled to one side thereof; And a restoration spring disposed inside the lower tube, wherein the upper tube is slid longitudinally along an outer circumferential surface of the lower tube.

In addition, the cut-out switch of the present invention includes: And a separation protrusion formed on an outer wall of the lower tube to prevent the upper tube from being separated from the lower tube by the restoration spring.

Further, when the external force extinguishes to the operating rod fitted in the operating ring, the separation preventing jaw and the separation preventing projection can come into contact with each other by the restoring spring.

The restoring spring may be made of a metal material so that the upper tube and the upper and lower tubes are energized.

Further, the cut-out switch of the present invention includes: a lower fixing unit coupled to a lower portion of a fuse; And a holder coupled to an upper portion of the lower fixing portion and surrounding the fuse, wherein the holder can be rotatably connected to the hinge of the lower fixing portion.

According to the cut-out switch of the present invention, by dispersing the force of the external force generated when the cut-out switch is turned on and off, the impact strength of the coupling insulator is lowered, thereby preventing phosphoric acid failure and safety accidents . As a result, secondary safety accidents due to the deviation of the cut-out switch can be prevented.

In addition, the present invention has the effect of facilitating the insertion and opening of the cut-out switch due to the reduction in frictional force during operation, and also improving the work efficiency of the operator.

1 is a conceptual diagram illustrating an example in which a cut-out switch according to an embodiment of the present invention is applied.
2 is a perspective view of a cut-out switch according to an embodiment of the present invention.
3 is a cross-sectional view of a cut-out switch according to an embodiment of the present invention.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Hereinafter, the cut-out switch 100 according to the embodiment of the present invention will be described.

As shown in FIG. 1, the protection device of the pneumatic transformer is provided with a cut-out switch 100 provided in an electric current path of a power line of a pole pole 10 and a pillar transformer to protect the transformer 11 from an overload. Generally, in the cut-out switch, the holder of the cut-out switch is installed with the fuse attached to the upper fixing portion. Here, in order to insert or open the cut-out switch, the operation rod 40 is inserted into the operation ring of the cut-out switch.

As described above, the conventional cut-out switch is disadvantageous in that when the operator breaks the engagement insulator due to the force of external force generated during the operation or input operation of the operator through the operation rod, the cut-out switch is disengaged or a secondary safety accident Respectively. The cutout switch 100 according to an embodiment of the present invention is configured so that the holder 130 is inserted into the cutout switch 100 to facilitate insertion and opening of the body of the cutout switch 100 and the holder 130 of the cutout switch 100. [ To absorb the external force.

Hereinafter, a cut-out switch 100 according to an embodiment of the present invention will be described with reference to FIGS. 2 and 3. FIG. The cutout switch 100 according to an embodiment of the present invention includes an upper fixing part 110, a lower fixing part 120, a holder 130, a fuse 170, an upper tube 150, a lower tube 160, And a restoring spring 180. Hereinafter, with reference to FIG. 2 and FIG. 3, description will be made of configurations of the cut-out switch 100 according to an embodiment of the present invention.

First, the upper fixing part 110 is connected to one side of the power line of the mains, and the lower fixing part 140 is connected to the other side of the power line of the mains. In addition, the upper surface of the upper fixing part 110 may have a protruding round shape. Accordingly, when the cut-out switch 100 is opened through the operating rod 40 described below, the contact area of the upper fixing part 110 is reduced, and more smooth opening is possible.

The holder 130 is connected to the lower fixing portion 140. Specifically, the holder 130 is coupled to the upper portion of the lower fixing portion 140 and has a shape to surround the fuse 170, which will be described below. The lower fixing part 140 is further provided with a hinge through which the holder 130 is rotatably connected to the lower fixing part 140 via the hinge. Accordingly, when the worker puts the operation rod in the operation ring 120 and applies force to the operation rod in the direction of the operator, the holder 130 is rotated around the hinge so that the opening of the cut- .

3, the fuse 170 is installed inside the holder 130. As shown in Fig. Here, the lower tube 160 may be formed on the fuse 170 and the fuse 170 may be coupled to the lower surface of the lower tube 160. Here, the lower tube 160 may have a structure in which the upper portion is opened as shown in FIG.

The upper tube 150 is formed on the upper side of the lower tube 160. The upper tube 150 has a structure in which a lower portion thereof is opened, and has a structure that is slid in the longitudinal direction along the outer peripheral surface of the lower tube 160. As described above, the cut-out switch according to the embodiment of the present invention is intended to disperse the force applied to the suspending insulator through the operating rod when the worker operates. That is, the upper tube 150 is slid on the lower tube 160, so that the operator does not forcibly open the cut-out switch 100 by applying force, The length of the entire cut-out switch 100 is reduced as the upper tube 150 is slid toward the lower tube 160 when pulled in the direction of the paper surface. Accordingly, the height at which the upper fixing part 110 is caught can be reduced for fixing the suspension fixture 110 and the suspension fixture of the present invention. Accordingly, an embodiment of the present invention has a structure in which the operator can open the cut-out switch 100 only by pulling the operation ring 120 from the upper tube 150 toward the lower tube 160.

The upper side of the upper tube 150 is connected to the upper fixing part 110 so that the power line is electrically connected. An operation ring 120 for shorting the power line by rotating the holder 130 is provided on the outer circumferential surface of the upper tube 150.

In addition, a restoring spring 180 for increasing or decreasing elasticity by sliding the upper tube 150 may be disposed in the lower tube 160. This allows the upper tube 150 to be maintained in the upward direction at normal times and to allow the sliding movement of the upper tube 150 in the longitudinal direction along the outer circumferential surface of the lower tube 160 when an external force is generated through the operating rod . That is, when an external force is applied to the operating rod 40 fitted to the operating ring 120, the restoring spring 180 is contracted, and when the external force is extinguished, the restoring spring 180 can be restored to its original shape. The restoring spring may be made of a metal material. Thus, the upper tube 150 and the lower tube 160 can be energized.

As shown in FIG. 3, a separation preventing protrusion 151 may be formed on the inner wall of the upper tube 150, and a separation preventing protrusion 161 may be formed on the outer wall of the lower tube 160. Further, when the external force extinguishes to the operation rod fitted to the operation ring 120, the release spring 151 can abut against the release preventing projection 161 by the restoring spring 180. [ Accordingly, even when the restoring spring 180 is retracted or restored, the upper tube 150 can be prevented from being separated from the lower tube 160.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: cut-out switch 110: upper fixing part
120: operating ring 130: holder
140: lower fixing part 150: upper tube
151: Leakage prevention jaw 160: Lower tube
161: Disengagement prevention projection 170: Fuse
180: Restoring spring

Claims

A lower tube having an upper portion opened;
A fuse coupled to a lower surface of the lower tube;
An upper pipe connected to an upper side of the lower tube and having an operation ring coupled to one side thereof; And
And a restoration spring disposed inside the lower tube,
Wherein the upper tube is slid longitudinally along an outer circumferential surface of the lower tube.

The method according to claim 1,
A separation preventing lip formed on an inner wall of the upper tube; And
Further comprising a separation protrusion formed on an outer wall of the lower tube to prevent the upper tube from being separated from the lower tube by the restoration spring.

The method of claim 2,
Wherein when the external force is extinguished in the operating rod fitted to the operation ring, the separation preventing jaw and the separation preventing projection abut on each other by the restoration spring.

The method according to claim 1,
Wherein the restoring spring is made of a metal material so that the upper tube and the lower tube are energized.

The method according to claim 1,
A lower fixing part coupled to a lower portion of the fuse; And
And a holder coupled to an upper portion of the lower fixing portion to surround the fuse,
And the holder is rotatably connected via a hinge of the lower fixing part.