KR102279331B1 - Arc eliminator with vacuum interrupter - Google Patents

Abstract

The present invention relates to an arc eliminator and, more specifically, to an arc eliminator with a vacuum interrupter (VI) applied as an arc extinguishing unit. An object of the present invention is to provide an eco-friendly arc eliminator and provide an arc eliminator which can be used repeatedly and has a semi-permanent maintenance-free structure. According to a preferred embodiment of the present invention, the arc eliminator with a VI comprises: a Thompson coil (5); an armature (7) disposed on the upper part of the Thompson coil (5); a movable shaft (6) passing through the armature (7) and fixed to the armature (7); a disk fixing holder (15) fixed to the movable shaft (6); and a disk spring (16) fixed to the disk holding holder (15). Accordingly, since the VI is applied, use of non-environmental gases can be prevented. In addition, a semi-permanent maintenance-free structure can be provided due to the long lifespan characteristics of the VI.

Description

Arc eliminator with vacuum interrupter}

The present invention relates to an arc eliminator, and more particularly, to an arc eliminator to which a vacuum interrupter (“VI”) is applied as an arc extinguishing unit.

A switchgear is a facility that converts high-voltage power into low-voltage power and supplies power to consumers. Switchgear, lightning arrester, transformer, circuit breaker and various measuring equipment are provided inside the switchgear. An arc may occur due to an insulation defect or a physical bonding defect while the switchgear is operating. The arc can cause a fire inside the switchboard, so it must be shut off quickly.

To this end, an arc eliminator may be installed on the switchboard. The arc eliminator insulates the two electrodes (high voltage electrode and ground electrode) in an open state (non-energized state) in the normal state, and when an arc accident occurs in the switchboard, it energizes the two electrodes at high speed to restore the power system to three phases. Can be short-grounded, and can eliminate arcing.

The arc eliminator may include an arc extinguishing part, and SF6, an inert insulating gas having excellent insulating properties, may be filled inside the case to be insulated with an insulating material. The arc extinguishing unit may be installed to be spaced apart from two electrodes, a high voltage electrode and a ground electrode, inside a case made of an insulating material, and a movable electrode may be installed to be variably positioned inside the case.

However, SF6 used as an insulating gas is a non-environmental gas and may cause environmental pollution.

1. Korea Patent Application No. 10-2016-0029769 (filed on: March 11, 2016) 2. Korea Patent Application No. 10-2016-0029277 (filed on: March 11, 2016)

An object of the present invention is to provide an eco-friendly arc eliminator. At the same time, an object of the present invention is to provide an arc eliminator that can be used repeatedly and has a semi-permanent maintenance-free structure.

The arc eliminator VI is applied according to a preferred embodiment of the present invention is a Thomson coil (5); an armature (7) located above the Thompson coil (5); a movable shaft (6) passing through the armature (7) and fixed to the armature (7); a disk fixing holder (15) fixed to the movable shaft (6); and a disk spring (16) fixed to the disk holding holder (15).

Here, the movable shaft 6 may move the movable terminal 12 of the vacuum interrupter 10 up and down.

In addition, the armature 7 may generate a magnetic flux in the opposite direction to the Thompson coil 5 to move upward with a repulsive force.

The present invention applies VI so that non-environmental gases can be prevented from being used. In addition, it can have a semi-permanent maintenance-free structure due to the long lifespan characteristics of VI.

In addition, it is possible to improve the input operation speed by applying the disk spring to the operation mechanism, and to stably maintain the closing and open state.

1 is a cross-sectional view of an arc breaker according to a preferred embodiment of the present invention.
Figure 2 is a view for explaining the operation of the arc circuit breaker of Figure 1;
3 is a conceptual diagram for explaining the shape of the disk spring in the input state.
FIG. 4 is a view for explaining the opening operation of the arc breaker of FIG. 1 .
5 is a conceptual diagram for explaining the shape of a disk spring in an open state.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In describing each figure, like reference numerals have been used for like elements. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention.

The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, an arc eliminator to which VI is applied according to a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 5 . In order to clarify the gist of the present invention, descriptions of previously known matters will be omitted or simplified.

Referring to Figure 1, the arc breaker according to the present invention includes a base frame (1). An upper portion of the base frame 1 may be opened. The base frame 1 may have a downwardly convex shape. When the arc breaker is in open mode, the base frame 1 can receive a disc spring 16 therein.

A top frame 2 may be provided directly above the base frame 1 . The base frame 1 and the top frame 2 may be vertically spaced apart. The top frame 2 may be supported by a plurality of support rods 3 .

The top frame 2 may be fixed to the upper side of the support bar 3 , and the lower side of the support bar may be fixed to the base frame 1 .

A coil assembly 4 may be provided between the base frame 1 and the top frame 2 . The coil assembly 4 may be a hollow cylinder. The upper and lower portions of the coil assembly 4 may extend outwardly in a disk shape. An upper surface of the coil assembly 4 may be spaced apart from the top frame 2 , and a lower surface of the coil assembly 4 may be spaced apart from the base frame 1 . The side of the coil assembly 4 may be fixed to the plurality of support rods 3 .

Between the base frame 1 and the coil assembly 4, a spring change space S2 that can change the shape of the disk spring 16 to be described later may be provided. Here, the shape change of the disk spring 16 means that the disk spring 16 is changed up to the maximum displacement point in the closing mode and the open mode.

An armature moving space S1 may be provided between the coil assembly 4 and the top frame 2 in which an armature 7 to be described later can move up and down.

The Thompson coil 5 may be wound around the coil assembly 4 . The Thompson coil can be excited by an external power source.

The movable shaft 6 may be installed through the center of the coil assembly 4 . The movable shaft 6 may be installed to be movable up and down in the center of the coil assembly 4 . The movable shaft 6 may pass through the center of the coil assembly 4 , the center of the armature 7 , and the center of the top frame 2 in the upper direction, and the upper end of the movable shaft 6 is the upper part of the top frame 2 . can protrude. The movable shaft 6 may pass through the center of the disk fixing holder 15, the center of the disk spring 16, the center of the base frame 1, and the open handle support 17 in the lower direction, and the movable shaft ( The lower end of 6) may protrude to the lower part of the open handle support 17 .

The armature 7 may be positioned between the top surface of the coil assembly 4 and the top frame 2 . The center of the armature 7 may be fixed to the movable shaft 6 . When the Thompson coil 5 is excited, the armature 7 may generate a magnetic flux in the opposite direction to the magnetic flux induced in the Thompson coil 5 . At this time, by the electromagnetic force generated between the armature 7 and the Thomson coil 5 , a repulsive force may act between the armature 7 and the Thomson coil 5 . By the repulsive force, the armature 7 can move toward the top frame 2 located above. The armature 7 is in close contact with the upper surface of the coil assembly 4 when the arc breaker is in the open mode, and when the arc breaker is in the closing mode, moves upward and is in close contact with the top frame 2 or on the top frame 2 side. can be located

The upper conductive plate 8 may be located directly above the top frame 2 . The upper conductor plate 8 may be mutually spaced apart from the top frame 2 .

The upper conductor plate 8 may be supported by a plurality of insulating support rods 9 .

A vacuum interrupter 10 may be positioned below the upper conductive plate 9 . The upper conductor plate 8 can be connected to the high-voltage side.

A support plate 11 may be positioned between the upper conductor plate 8 and the top frame 2 . The side of the support plate 11 may be fixed to a plurality of insulating support rods (9).

The vacuum interrupter 10 may be positioned between the upper conductor plate 8 and the support plate 11 . A lower portion of the vacuum interrupter 10 may be supported by an upper surface of the ground magnetic plate 11 .

The vacuum interrupter 10 may include a fixed terminal T and a movable terminal 12 . An upper side of the fixed terminal T may be electrically connected to the upper conductive plate 8, and a fixed electrode (not shown) may be provided at the lower portion. A movable electrode (not shown) may be provided on an upper side of the movable terminal 12 , and a lower portion of the movable terminal 12 may extend to a lower portion of the vacuum interrupter 10 . The movable electrode and the fixed electrode can perform an input operation and an opening operation by being in close contact with and separated from the inside of the vacuum interrupter. In the present invention, by applying a vacuum interrupter to the arc extinguishing unit, a non-environmental gas is not used as an insulating medium. In addition, semi-permanent use may be possible due to the characteristics of the lifespan of the vacuum interrupter.

A lower portion of the movable terminal 12 may be bound to an upper portion of the insulating rod 13 .

One side of the grounding conductor 14 may be electrically connected to the movable terminal 12 . The other side of the ground conductor 14 may be electrically connected to a ground (not shown). The ground conductor 14 may be formed of a flexible conductor. Accordingly, when the movable terminal 12 moves up and down, the grounding conductor 14 may not be separated from the movable terminal 12 .

The insulating rod 13 may be positioned between the movable terminal 12 and the movable shaft 6 . The insulating rod 13 may be manufactured in a rod shape, and the upper side may be bound to the movable terminal 12 , and the lower side may be bound to the movable shaft 6 .

The disk fixing holder 15 may be installed under the coil assembly 4 . The disk fixing holder 15 can pass through the movable shaft 6 in the center. The center of the disk fixing holder 15 may be fixed to the movable shaft 6 passing therethrough. The disk fixing holder 15 may penetrate the base frame 1 through the central region. The disk fixing holder 15 can move along the movable shaft 6 up and down in the spring change space S2 and the central lower space of the disk frame 15 . The disk holding holder 15 is cylindrical, and the radius of the central region may be smaller than that of the upper and lower regions.

The disk spring 16 is a disk-shaped spring, and the central region may be perforated. And, the perforated central region of the disc spring 16 may be fitted into the central region of the disc frame 15 . The disc spring 16 can change shape along the disc holding holder 15 up to an upper maximum displacement point and a lower maximum displacement point. A side lower surface of the disk spring 16 may be supported by the base frame 1 .

The open handle support 17 may be located at a lower center of the base frame 1 . The open handle support 17 can accommodate the movable shaft 6 and the disk fixing holder 15 therein. The open handle support 17 is hollow, so that the movable shaft 6 and the disk fixing holder 15 can freely move up and down in the inner space. In this structure, as in FIG. 1 , the open handle 18 is closely attached to the lower part of the open handle support 17 , and the open handle 18 is used to rotate the screw thread of the lower region of the movable shaft 6 . The movable shaft 6 can be moved downward. Thereby, the arc breaker can be opened.

The arc breaker having the structure as shown in FIG. 1 performs the input operation through the following actions.

Referring to FIG. 2 , current may be applied to the Thompson coil 5 when the arc breaker is in the closing mode. At this time, it is possible to generate magnetic flux in the first direction by excitation of the Thompson coil 5 . In this case, the armature 7 may generate magnetic flux in a direction opposite to the first direction. At this time, a repulsive force acts between the armature 7 and the Thompson coil 5, and the armature 7 can move upward by the repulsive force. At this time, the movable shaft 6 fixed to the center of the armature 7 may move upward. Then, the insulating rod 13, the movable terminal 12, and the disk fixing holder 15 fixed to the lower part of the movable shaft 6 sequentially fixed on the movable shaft 6 are moved upward along the movable shaft 6 can move At this time, the center of the disc spring 16 drooping downward may move upward along the disc fixing holder 15 . The disk spring 16 can push up the movable shaft 6 at a rapid speed while protruding upward through the dead center while moving upward. The disc spring 16 may have an upwardly convex shape as shown in FIG. 3 when the shape is changed to the upper maximum displacement point beyond the dead point. And, if an external force that exceeds the dead center is not applied, the shape as shown in FIG. 3 can be maintained by elasticity. When the closing operation is completed, the closing state (the state in which the movable electrode and the fixed electrode are in contact) can be more stably maintained due to the elasticity of the disk spring 16 . Therefore, even if the Thompson coil 5 is provided only enough to generate an electromagnetic force that the disk spring 16 is displaced upward beyond the dead center, the input operation can be smoothly performed.

The arc breaker having the structure as shown in FIG. 1 may perform an opening operation through the following actions.

Referring to FIG. 4 , the open handle 18 (see FIG. 1) is fixed to the lower part of the open handle support (17, see FIG. 1), and the open handle 18 accommodates the movable shaft 6 inside the open handle. By rotating (18) in the open direction, the movable shaft (6) can be moved downward. At this time, by the force of the movable shaft 6 moving by the rotational force of the open handle 18 , the disk spring 16 may be displaced beyond the dead center to the lower maximum displacement point. In this case, the disk spring 16 may have a downwardly convex shape as shown in FIG. 5 . The shape of FIG. 5 may be maintained as long as an external force capable of crossing the dead center is not applied to the upper part. Through such fixing, the arc breaker may be opened, and the open state may be maintained by the elastic force of the disk spring 16 .

1: base frame
2: Top frame
3: support bar
4: Coil assembly
5: Thompson Coil
6: movable shaft
7: amateur
8: upper conductor plate
9: Insulation support bar
10: vacuum interrupter
11: support plate
12: movable terminal
13: insulated rod
14: ground conductor
15: disc fixing holder
16: disc spring
17: open handle support
18 : open handle
S1: amateur moving space
S2: spring change space
T: fixed terminal

Claims (3)

Thompson coil (5);
an armature (7) located above the Thompson coil (5);
a movable shaft (6) passing through the armature (7) and fixed to the armature (7);
a disk fixing holder (15) fixed to the movable shaft (6); and
a disc spring (16) fixed to the disc holding holder (15);
The disk spring 16 is an arc eliminator to which VI is applied, characterized in that it has a convex shape when the shape is changed to the upper maximum displacement point beyond the dead point. The method of claim 1,
The movable shaft 6 is an arc eliminator to which VI is applied, characterized in that it moves the movable terminal 12 of the vacuum interrupter 10 up and down. The method of claim 1,
The arc eliminator VI is applied, characterized in that the armature 7 generates a magnetic flux in the opposite direction to the Thompson coil 5 and moves upward with a repulsive force.

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