KR101703760B1 - both-way switchgear for Vacuum circuit breaker - Google Patents

Abstract

case; A connecting section bar fixedly installed on one side and the other side of the case; A guide contact part formed at one end of the connecting part sheath and having a guide groove of a structure opened at one side; A vacuum interrupter unit installed between the guide contact portions; A spring unit installed on one side and the other side of the vacuum interrupter unit; A contact terminal installed at an end of the spring unit and interrupting and applying a current to be energized to the guide contact portion; And an operation unit installed at one side of the outer surface of the case and rotatably operating the vacuum interrupter unit.
Accordingly, it is possible to reduce the total size of the opening / closing operation device compactly by greatly reducing the number of components for opening and closing operations, as well as promptness of interruption of the current and input operation.

Description

Both-way switchgear for vacuum circuit breaker

The present invention relates to a bidirectional switchgear for a vacuum circuit breaker, and more particularly, to a bidirectional switchgear for a vacuum circuit breaker which is realized by a rotary method in which a vacuum circuit breaker is directly rotated to greatly reduce the number of components for opening and closing operations, To a bidirectional opening / closing actuator for a vacuum interrupter capable of reducing the size compactly.

In general, the switchgear is used to deliver a high-voltage power source of 22,000 V or more to an industrial facility such as a factory.

The opening / closing device includes a housing having a structure for interrupting and connecting (connecting) a high voltage current to be connected to a load such as a power generating device, a main movable contact provided in the housing and including a fixed conductor and a movable conductor, .

In addition, in the process of interrupting and injecting a high-voltage current through the main copper contact of the opening and closing device, an insulated gas made of a high-pressure gas is charged in the housing so as not to generate an arc when the fixed conductor and the movable conductor are close or apart .

Since the insulating gas switching device is insulated and its opening and closing ability is influenced by the gas pressure, it is difficult to always check whether the gas is leaking or not and the gas pressure has to be monitored.

In addition, there are problems such as environmental destruction due to harmful substances generated in the occurrence of an arc,

Therefore, in recent years, a vacuum breaker is provided inside the opening / closing device instead of using an insulating gas.

However, in the case of the opening / closing apparatus provided with the vacuum circuit breaker, since the power connecting means for operating the vacuum circuit breaker is provided, and the link connecting unit having the complicated operation configuration for connecting the power transmitting means and the vacuum circuit breaker is provided, , The power transmission speed is slow due to the mechanical interlocking action of the link connecting unit, and the total size of the opening and closing device can not be efficiently reduced.

Also, the power transmission system of the link connection unit frequently causes shaking and frictional impact between the components in the process of varying the rotational motion to linear motion, and thus has a problem of greatly lowering the operational reliability.

Korean Registered Utility Model No. 0420983 (June 30, 2006)

SUMMARY OF THE INVENTION The present invention has been accomplished to solve the above-mentioned problems, and it is an object of the present invention to provide a vacuum circuit breaker in which a vacuum circuit breaker is directly rotated to realize a rapid shut- Closing switch for a vacuum circuit breaker which can reduce the overall size of the vacuum circuit breaker compactly.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bidirectional opening and closing actuator for a ball breaker which can minimize the frictional impact between the components operating the vacuum circuit breaker to further improve the reliability of operation and the life of the product.

In order to achieve the above object, a bidirectional opening and closing actuator for a vacuum circuit breaker according to the present invention comprises: a case; A connecting section bar fixedly installed on one side and the other side of the case; A guide contact part formed at one end of the connecting part sheath and having a guide groove of a structure opened at one side; A vacuum interrupter unit installed between the guide contact portions; A spring unit installed on one side and the other side of the vacuum interrupter unit; A contact terminal installed at an end of the spring unit and interrupting and applying a current to be energized to the guide contact portion; And an operation unit installed at one side of the outer surface of the case and rotatably operating the vacuum interrupter unit.

The guide groove is formed in a curved shape having an entrance on one side and a closed end on the other side, and the radius of curvature gradually decreases from the entrance to the closed end.

And guide protrusions are formed on both side surfaces of the contact terminal, the guide protrusions being engaged with the guide grooves and slidably moving along the guide grooves.

Wherein the vacuum interrupter unit comprises: a contact member arranged to face one side and the other side; a movable terminal for connecting the contact member in a linearly movable manner; a vacuum case for closing at least part of the contact member and the movable terminal, And an insulating case for inserting the vacuum case in a wrapping state and having respective connectors at one side and the other side of the outer side.

The spring unit includes a connection plate connected to an end of the movable terminal, a first spring interposed between the connection plate and the vacuum case to elastically support the movable terminal, and a second spring interposed between the connection plate and the contact terminal And a second spring for elastically supporting the contact terminal.

When the spring unit is viewed from the side, the first spring compresses in the vertical direction according to the rotated position of the vacuum interrupter unit, and the second spring performs compressive deformation in the longitudinal direction and elastic deformation in the lateral direction .

The spring unit is further provided with a protective case for protecting the first spring and the second spring in a wrapping state.

An insulating rotary shaft corresponding to a connection port of the insulating case is formed on the inner surface of the case, and the operation unit is connected to any one of the insulating rotary shafts.

The operation unit may be a rotary lever for manual operation or a motor or actuator for generating a driving force from an electric current to rotate in the normal and reverse directions .

According to the present invention having the above-described configuration, by implementing the rotary type in which the vacuum interrupter unit directly rotates to interrupt the current with respect to the guide groove of the guide contact portion, it is possible to quickly interrupt the current, The number of components can be greatly reduced and the entire size of the opening and closing operation device can be compactly reduced.

In addition, by constituting the spring unit between the vacuum interrupter unit and the contact terminal, the spring unit can elastically flow and absorb the friction contact when the contact terminal and the guide contact part are in contact with each other, The contact portion can be prevented from being easily deformed or broken by the friction collision, and the reliability of operation can be further improved.

1 is a side cross-sectional view showing the construction of a bi-directional open / close actuator for a vacuum circuit breaker according to an embodiment of the present invention.
Fig. 2 is a front sectional view of Fig. 1. Fig.
3 is a cross-sectional view illustrating a state in which a current is interrupted in the bidirectional opening / closing actuator for a vacuum circuit breaker according to the embodiment of the present invention.
FIG. 4 is a cross-sectional view illustrating a step in which a vacuum interrupter unit of a bidirectional opening / closing actuator for a vacuum breaker according to an embodiment of the present invention rotates to energize a current.
5 is a cross-sectional view showing a state in which a vacuum interrupter unit is operated by a compression action of a spring unit of a bidirectional opening / closing actuator for a vacuum circuit breaker according to an embodiment of the present invention and a current is applied thereto.
6 is a cross-sectional view illustrating a state in which a bidirectional opening / closing actuator for a vacuum circuit breaker according to an embodiment of the present invention is detachably coupled to a cradle.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in the drawings, the bidirectional opening and closing apparatus for a vacuum interrupter according to the present invention includes a case 100, a connecting section 200 fixed to one side and the other side of the case 100, A guide interlocking unit 400 installed between the guide contact unit 300 and a vacuum interrupter unit 400 installed between the guide contact unit 300 and the vacuum interrupter unit 300. [ A contact terminal 600 installed at one end of the spring unit 500 and interrupting and supplying current to the guide contact part 300; And an operation unit 700 installed at one side of the outer surface of the case 100 to rotate the vacuum interrupter unit 400. [

First, the case 100 is an enclosure structure having an installation space portion 101 therein, and protects various components to be installed in the installation space portion 101 safely.

In this case 100, it is preferable that a plurality of plates are combined with each other to form a hexahedron box structure, but the present invention is not limited thereto.

It is a matter of course that an opening / closing door (not shown) for maintenance is installed in the case 100.

The inner circumference of the case 100 is formed on one side and the other side of the insulated rotary shaft 120 in which the insulative rotary shaft 120 is coupled in correspondence with the connection port 441 of the insulation case 100 to be described later (see FIG. 2) .

In addition, any one of the insulation rotary shafts 120 is coupled with an operation unit 700 to be described later.

In addition, the case 100 may further include an operation case 130 for protecting the operation unit 700 in a state of being wrapped around the outer surface of the case 100.

The connection part scuba 200 is fixed to one side and the other side of the case 100 and includes two components that are supplied with current from the power source side A and supply current to the load side B, Respectively.

The connection part scuba 200 has a structure in which one end in the longitudinal direction is positioned in the case 100 and the other end is protruded outside the case 100.

That is, the protruding portion of the connecting portion sheath 200 outside the case 100 is to make electrical contact with the other power source side bus bar A 'and the load side bus bar B' (see FIG. 5 Reference).

Meanwhile, the guide contact part 300 is installed at one end of the connection part sheath 200, and guides the path so that the vacuum interrupter unit 400, which will be described later, can interrupt and input the current.

In addition, the guide contact portion 300 is formed with a guide groove 310 having one side opened.

One side of the guide groove 310 is formed in a curved shape having an entrance 311 and a closed end 312 formed on the other side of the guide groove 310. The radius of curvature from the entrance 311 to the closed end 3112 Is made smaller.

The reason why the radius of curvature of the arc gradually decreases from the entrance 311 to the closed end 312 of the guide groove 310 is that the vacuum interrupter unit 400 is rotated in the course of rotating the vacuum interrupter unit 400, And the spring unit 500 is connected to the spring unit 500 to induce compression and restoration.

That is, the vacuum interrupter unit 400, which rotates along the path of the guide groove 310, performs a function of interrupting and closing the current according to the compression and decompression action of the spring unit 500.

The vacuum interrupter unit 400 is installed between the guide contact portions 300 and directly rotates by the operation of rotating the operation unit 700.

The bidirectional opening and closing operation device for a vacuum breaker according to the present invention is configured such that the vacuum interrupter unit 400 is rotated by the connection portion scuba 200 not in contact with the vacuum interrupter unit 400, ) Is cut off and put in.

That is, it is necessary to additionally install a link connecting unit having a complicated operation configuration for operating the vacuum interrupter unit 400, as in the prior art, by directly rotating the vacuum interrupter unit 400, It is possible to improve both the opening / closing speed of the apparatus and the problem of not effectively reducing the size of the opening and closing apparatus.

Specifically, the vacuum interrupter unit 400 includes a contact member 410 arranged to face one side and the other side, a movable terminal 420 connecting the contact member 410 in a linearly movable manner, A vacuum case 430 for sealing at least a part of the movable terminal 420 and the movable terminal 420 in a state of enclosing the vacuum case 430 and a connection hole 441 formed at one side and the other side of the outer side, And an insulating case 440.

Here, the contact members 410 of the vacuum interrupter unit 400 are moved in a direction in which they are in contact with each other or in a direction away from each other by the movable terminal 420.

That is, the contact member 410 is an operation configuration in which one of the contact members 410 is fixed and the other one of them moves and contacts or moves away from each other by a predetermined distance instead of moving or contacting or separating.

Basically, the vacuum interrupter unit 400 extinguishes the arc current generated at the time of current input, interruption, and grounding, thereby preventing electrical damage to the connection portion scuba 200.

In addition, the vacuum interrupter unit 400 provides the effect of greatly reducing the risk of an electric shock accident in which electric current is externally conducted by the insulation case 440.

The spring unit 500 is installed on one side and the other side of the vacuum interrupter unit 400 and elastically supports the movable terminal 420 and a contact terminal 600 to be described later.

The spring unit 500 includes a connection plate 510 connected to an end of the movable terminal 420 and a connection plate 510 interposed between the connection plate 510 and the vacuum case 430, And a second spring 530 interposed between the connection plate 510 and the contact terminal 600 to elastically support the contact terminal 600. The first spring 520 supports the contact terminal 600,

When the spring unit 500 is viewed from the side, the first spring 520 compresses in the vertical direction according to the rotation position of the vacuum interrupter unit 400, and the second spring 530 compresses And performs compressive strain in the longitudinal direction and elastic deformation action in the lateral direction.

At this time, the movable terminal 420 linearly moves in the vertical direction according to the compression action of the first spring 520, and the second spring 530 presses the first spring 520 to apply pressure To carry out compressive deformation.

Particularly, the second spring 530 is connected to the contact terminal 600 so that when the contact terminal 600 moves along the guide groove 310, when a frictional impact comes into contact with the closed end 312, Since the second spring 530 connected to the terminal 600 absorbs the frictional impact from the elastic deformation that flows laterally, it is possible to prevent the contact terminal 600 and the guide contact portion 300 from being easily deformed or damaged There is an effect.

The spring unit 500 further includes a protection case 540 for protecting the first spring 520 and the second spring 530 in a wrapping state.

This is so that the spring unit 500 does not interfere with the operation due to the intrusion of other foreign matter in the compression and restoration operations.

The contact terminal 600 is provided at an end of the spring unit 500 and serves as an intermediate medium for contacting and inserting a current applied to the guide contact part 300.

On both sides of the contact terminal 600, a guide protrusion 610 is formed which is coupled to the guide groove 310 and slides along a path.

That is, the contact terminal 600 is connected to the spring unit 500 and the guide protrusion 610 is inserted into the guide groove 310 in the process of rotating together with the rotation direction of the vacuum interrupter unit 400 The current is passed through the guide contact part 300 and the current is cut off when it is released.

The contact radius of the contact terminal 600 moving along the guide groove 310 of the guide contact part 300 decreases toward the closed end part 312. At this time, the spring unit 500 is compressed by the reduced turning radius, and the compressed spring unit 500 linearly moves the movable terminal 420, so that the contact members 410 are in contact with each other So that a state where current is applied from the power source side A to the load side B is maintained.

In contrast, when the contact terminal 600 located at the closed end 312 of the guide groove 310 moves toward the entrance 311, the spring unit 500 which has been compressed returns to the opposite side of the movable terminal 420 The contact members 410 are disconnected from the current flowing from the power source side A to the load side B as they are separated from each other.

The operation unit 700 is installed at one side of the outer surface of the case 100 and rotatably operates the vacuum interrupter unit 400.

The operation unit 700 may be a rotation lever 710 for manual operation or a motor (not shown) or an actuator (not shown) for generating a driving force from a current to rotate in the normal and reverse directions.

The bidirectional opening and closing actuator for a vacuum circuit breaker according to the present invention includes a connection portion 200, a guide contact portion 300, a vacuum interrupter unit 400, a spring unit 500, Terminals 600 may be provided in each case and may be installed in the case 100 as an integral connection structure (see FIG. 2).

In addition, the case 100 can be manufactured by attaching / detaching to / from a separate cradle (C, cradle) providing a structure in which a guide rail or a wheel 800 capable of sliding movement can be installed.

According to the present invention configured as described above, the vacuum interrupter unit 400 directly rotates with respect to the guide groove 310 of the guide contact portion 300 to implement a rotary type in which current is interrupted, It is possible to reduce the number of components for opening and closing operations as well as promptness, thereby reducing the overall size of the opening and closing manipulator compactly.

When the spring unit 500 is formed between the vacuum interrupter unit 400 and the contact terminal 600, the spring unit 500 can be rotated in a friction collision where the contact terminal 600 contacts the guide contact portion 300 500 can be elastically moved and absorbed, so that the contact terminal 600 and the guide contact portion 300 can be prevented from being easily deformed or broken due to friction collision, and the operation reliability can be further improved There is an effect that can be.

100: Case
200: Connection section
300: Guide contact part
310: guide groove
400: vacuum interrupter unit
410: contact member
420: movable terminal
430: Vacuum case
440: Insulation case
500: spring unit
510: connecting plate
520: first spring
530: Second spring
600: Contact terminal
610: guide projection
700: Operation unit

Claims (9)

case;
A connecting section bar fixedly installed on one side and the other side of the case;
A guide contact part formed at one end of the connecting part sheath and having a guide groove of a structure opened at one side;
A vacuum interrupter unit installed between the guide contact portions;
A spring unit installed on one side and the other side of the vacuum interrupter unit;
A contact terminal installed at an end of the spring unit and interrupting and applying a current to be energized to the guide contact portion; And
And an operating unit provided on one side of the outer surface of the case for rotatably operating the vacuum interrupter unit.
The method according to claim 1,
Wherein the guide groove has a curved shape having an entrance at one side and a closed end at the other side, and a radius of curvature gradually decreases from the entrance to the closed end.
3. The method of claim 2,
And guide projections are formed on both side surfaces of the contact terminal, the guide protrusion being engaged with the guide groove and sliding along the path.
4. The method according to any one of claims 1 to 3,
The vacuum interrupter unit includes:
A contact member disposed to face one side and the other side,
A movable terminal for connecting the contact member in a linearly movable manner,
A vacuum case for enclosing at least part of the contact member and the movable terminal in a state of enclosing the contact member,
And an insulating case which insulates the vacuum case in a wrapping state and has respective connecting ports formed on one side and the other side of the outer side.
5. The method of claim 4,
The spring unit includes:
A connecting plate connected to an end of the movable terminal,
A first spring interposed between the connection plate and the vacuum case to elastically support the movable terminal,
And a second spring interposed between the connection plate and the contact terminal to elastically support the contact terminal.
6. The method of claim 5,
When the spring unit is viewed from the side, the first spring compresses in the vertical direction according to the rotated position of the vacuum interrupter unit, and the second spring compresses and elastically deforms in the longitudinal direction Wherein said vacuum circuit breaker is a two-way switching device for a vacuum circuit breaker.
6. The method of claim 5,
Wherein the spring unit further comprises a protective case for protecting the first spring and the second spring in a wrapping state.
5. The method of claim 4,
Wherein an insulating rotary shaft corresponding to a connection port of the insulating case is formed on an inner surface of the case, and the operation unit is connected to any one of the insulation rotary shafts.
4. The method according to any one of claims 1 to 3,
And an operating case for protecting the operating unit is formed on one side of the outer surface of the case. The operating unit is a rotary lever for manual operation or a motor or actuator for generating a driving force from a current to rotate in the normal and reverse directions Bidirectional switchgear for vacuum circuit breaker.

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