KR20200124964A - Device for transform contact and circuit breaker using the same - Google Patents

Abstract

The present invention relates to a contact converter and a circuit breaker using the same. The contact converter includes: a manipulator which linearly drives a main shaft to change a contact point of a vacuum interrupter; a link having one end coupled to the main shaft of the manipulator to change a driving direction perpendicular to the driving direction of the main shaft; and a contact spring device unit having one end coupled to the link to convert the contact point of the vacuum interrupter by displacement, and as well as maintain a contact force by compressing a spring while the contact point is in contact, wherein one end of the contact spring device unit to which the link is coupled is a side adjacent to the vacuum interrupter. According to the present invention, a relative position of the contact spring device can be arranged closer to an inspection panel.

Description

Device for transform contact and circuit breaker using the same}

The present invention relates to a contact conversion device and a circuit breaker using the same, and more particularly, to a contact conversion device capable of improving space utilization by improving the structure of a contact conversion device using a spring spring and a circuit breaker using the same.

In general, a breaker serves to cut off an electrical circuit by a mechanical operation. In other words, it serves to protect load devices and lines from large currents caused by short circuits and ground faults that may occur in electric circuits.

Among the circuit breakers, a vacuum breaker is a type of circuit breaker configured to protect the power system by blocking the circuit when a dangerous situation such as a short circuit or overcurrent occurs by being installed in a high-voltage power system. In particular, it is a device that takes advantage of its excellent insulation performance and arc extinguishing power in a vacuum state.

In the vacuum interrupter, a vacuum interrupter (VI) cuts off the circuit in a vacuum extinguishing method to protect life and load.

VI includes an insulating container in a vacuum state, and a movable electrode and a fixed electrode positioned in the insulating container. The movable electrode can move linearly toward the fixed electrode side, and in normal operation, the movable electrode contacts the fixed electrode and serves to supply current to the load side.

In this case, when an abnormal situation such as a short circuit occurs, the movable electrode is released from contact with the fixed electrode, and thus the power side and the load side are electrically separated to cut off the current.

The movement of the movable electrode is performed by a contact conversion device provided outside the insulating container. The contact conversion device generally includes a spring device section for applying pressure to the movable electrode side, and a drive device section for driving the spring device section.

Even when the current is supplied to the load side, that is, when the movable electrode and the fixed electrode are in contact, the contact pressure between the movable electrode and the fixed electrode becomes a very important factor in ensuring stable current supply and safety.

This is because if the contact force between the movable electrode and the fixed electrode is very weak, heat generation and current loss may occur due to an increase in contact resistance, and if the contact force is excessive, mechanical damage may be caused.

For this, it is necessary to periodically check the contact spring device.

A conventional circuit breaker is shown in Patent Registration No. 10-1522267 of the applicant of the present invention (registered on May 15, 2015, the name of the invention circuit breaker).

The above registered patent also describes VI, a contact spring, and a link member that displaces the movable electrode by displacing the contact spring. The link member is characterized by being connected to one end of the contact spring in a direction away from the VI.

As described above, in the related art, when the link member is coupled to one end of the contact spring device in a direction away from VI to contact the movable electrode with the fixed electrode, the contact spring is pushed to the VI side, and the contact pressure is reduced by using the compressed state of the spring. It is a configuration to maintain.

The effects of such a configuration on the entire circuit breaker and problems associated therewith will be described with reference to the accompanying drawings.

1 is a schematic view of an open state of a circuit breaker using a conventional contact converter, FIG. 2 is a detailed configuration diagram of a spring device for a contact in FIG. 1, and FIG. 3 is a closed state of a circuit breaker using a conventional contact converter. ) Is a schematic diagram, and FIG. 4 is a detailed configuration diagram of a spring device for a contact in FIG. 3.

Referring to FIGS. 1 to 4, respectively, a panel 10 provided on the front side of the enclosure 20 of a circuit breaker, and a manipulator 30 positioned within the enclosure 20 to generate a driving force and transmit it through the link 32 Wow, the VI rod 50 connected to the movable contact of the vacuum interrupter (VI, 60), and the VI rod 50 by using the elastic restoring force of the spring 41 while being displaced according to the driving force of the manipulator 30 However, the link 32 is configured to include a contact spring device 40 coupled to the opposite side of the VI rod 50.

The panel 10 is openable, and the operator can check the contact spring device 40 in the enclosure 20.

The manipulator 30 located in the enclosure 20 may include a motor and a reduction gear therein to drive the main shaft 31 in the vertical direction. The specific configuration of the inside of the manipulator 30 is irrelevant to the present invention, and manipulators of various known structures may be used.

In FIG. 1, the manipulator 30 is in a state in which the main shaft 31 is moved downward, and in FIG. 3, the main shaft 31 is moved upward.

The link 32 converts a vertical linear motion of the main shaft 31 into a horizontal linear motion with respect to the ground.

One end of the link 32 is connected to the end of the main shaft 31, the center is fixed to the fixing part 21 provided in the enclosure 20, and the other end is at one end of the contact spring device 40 Are combined.

Referring to FIG. 2, the conventional contact spring device 40 includes a central rod 44, a fixed block 45 fixed to one end of the central rod 44, and fixed to one end of the VI rod 50. , A moving block 42 coupled to the link 32 to receive a driving force and moving along the central rod 44, and a spring positioned between the moving block 42 and the fixed block 45 ( 41), and an adjustment nut 43 that is coupled to the rear end center rod 44 of the movable block 42 to prevent separation of the movable block 42 and adjusts the compression force of the spring 41 do.

As mentioned above, the conventional contact spring device 40 has a characteristic in that the link 32 is coupled to the moving block 42 opposite to the positions of the VI rod 50 and the VI 60.

According to this connection characteristic, the arrangement relationship between the manipulator 30 and the contact spring device 40 in the enclosure 20 is determined.

That is, the manipulator 30 must be located closer to the panel 10 than the spring device 40 for contact within the enclosure 20. To this end, a support 33 for supporting the manipulator is required, and there is a problem that the use efficiency of the inner space of the enclosure 20 is deteriorated.

In addition, since the contact spring device part 40 is located farther from the panel 10, the operator checks the contact spring device part 40 or uses the adjustment nut 43 to control the compression force of the spring 41. There is a problem in that it is not easy to work such as adjusting.

Then, as shown in Fig. 3, in order to supply current to the load in a state where the current is cut off, the manipulator 30 moves the main shaft 31 upward, and accordingly, the link 32 moves the block 42 ), the direction of force is converted and transmitted in a horizontal direction with respect to the ground.

By the action of the link 32, the contact spring device 40 is displaced toward the VI 60 and the spring 41 is compressed.

That is, the length (X2) of the spring (41) of FIG. 4 is shorter than the length (X1) of the spring (41) of FIG. 2, which is the gap between the adjusting nut (43) and the moving block (42). It is expressed as the length (W). The compression length (W) may indirectly indicate the compression force of the spring 41, and the operator may measure the compression force by measuring the compression length (W).

Depending on the consumption of the contact point in the VI (60) may have a different compression force from the initial setting, the operator can measure and compensate for the change in the compression force.

At this time, the displacement of the contact spring device 40 displaces the movable contact of the VI 60 through the VI rod 50 to make contact with the fixed contact, and maintains the contact state stably by the compression force of the spring 41. I can.

However, as described above, since the contact spring device 40 is located relatively farther from the panel 10, there is a problem in that it is not easy to measure the crimping length (W) representing the crimping force.

The problem to be solved by the present invention in consideration of the above problems is to provide a contact conversion device capable of disposing the relative position of the contact spring device closer to the inspection panel and a circuit breaker using the same.

In addition, another problem to be solved by the present invention is to provide a contact conversion device for easy inspection and maintenance, and a circuit breaker using the same.

A contact conversion device according to an aspect of the present invention for solving the above technical problem includes a manipulator for linearly driving a main shaft for contact conversion of a vacuum interrupter, and one end is coupled to a main shaft of the manipulator, so that the main shaft A link that converts the driving direction of the link, and one end is coupled to the link, converts the contact of the vacuum interrupter by displacement, and includes a spring device for a contact to maintain a contact force by compressing the spring while the contact is in contact. In the contact conversion device described above, one end of the contact spring device portion to which the link is coupled is a side adjacent to the vacuum interrupter.

In an embodiment of the present invention, the contact spring device unit includes a spring positioned to surround the central rod, a movable portion to which one end of the central rod is coupled and the link is coupled through a fixing pin, and a straight line receiving the movable portion. In addition to guiding the movement, one end of the spring is in contact with a guide portion that allows the spring to be compressed when the movable part and the central rod are displaced, and the spring is coupled to the central rod so as to contact the other end of the spring, It may further include an adjustment nut capable of adjusting the.

In an embodiment of the present invention, the guide part may include a guide groove exposing the fixing pin, and may further include a measuring part capable of confirming the displacement of the fixing pin moving along the guide groove.

In an embodiment of the present invention, the link may be characterized in that the driving direction is changed to be a direction perpendicular to the driving direction of the main shaft.

In addition, a circuit breaker according to another aspect of the present invention includes a case in which an openable panel is installed on the front side, a manipulator that is accommodated in the case and linearly drives a main shaft to change a contact point of a vacuum interrupter, and a main shaft of the manipulator. One end is coupled to a link that converts the driving direction in a direction perpendicular to the driving direction of the main shaft, and one end is coupled to the link to convert the contact point of the vacuum interrupter by displacement and while the contact point is in contact A circuit breaker comprising a contact spring device for maintaining a contact force by compressing a spring, wherein one end of the contact spring device to which the link is coupled is a side adjacent to the vacuum interrupter.

In the present invention, by changing the structure of the contact spring device part and changing the position of the contact spring device to the vacuum interrupter side, the position of the contact spring device part can be relatively close to the panel, so that inspection and maintenance are easy. have.

In addition, according to the design change as described above, the position of the operation unit can be arranged at a position relatively farther from the panel, and thus, by not using a support, there is an effect of improving the internal space utilization of the circuit breaker enclosure.

1 is a schematic diagram of an open state of a circuit breaker using a conventional contact converter.
2 is a detailed configuration diagram of a contact spring device in FIG. 1.
3 is a schematic diagram of a closed state of a circuit breaker using a conventional contact converter.
4 is a detailed configuration diagram of a contact spring device in FIG. 3.
5 is a perspective view of a spring device for a contact applied to the present invention.
6 is a schematic diagram of an open state of a circuit breaker using the contact conversion device of the present invention.
7 is a detailed configuration diagram of a contact spring device in FIG. 6.
8 is a schematic diagram of a closed state of a circuit breaker using the contact conversion device of the present invention.
9 is a detailed configuration diagram of a contact spring device in FIG. 8.

In order to fully understand the configuration and effects of the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms and various modifications may be added. However, the description of the present embodiment is provided to complete the disclosure of the present invention, and to fully inform a person of ordinary skill in the art to which the present invention belongs. In the accompanying drawings, for convenience of description, the size of the components is enlarged compared to the actual size, and the ratio of each component may be exaggerated or reduced.

Terms such as'first'and'second' may be used to describe various elements, but the elements should not be limited by the above terms. The above terms may be used only for the purpose of distinguishing one component from other components. For example, without departing from the scope of the rights of the present invention, the'first element' may be referred to as the'second element', and similarly, the'second element' may also be named as the'first element'. I can. In addition, expressions in the singular include plural expressions unless clearly expressed otherwise in context. Terms used in the embodiments of the present invention may be interpreted as meanings commonly known to those of ordinary skill in the art, unless otherwise defined.

Hereinafter, an apparatus for maintaining airtightness of an ultra-high voltage circuit breaker according to an embodiment of the present invention will be described in detail with reference to the drawings.

5 is a perspective view of a spring device for a contact applied to the contact conversion device of the present invention.

Referring to FIG. 5, the spring device 400 for contact applied to the present invention includes a spring 410 positioned to surround the central rod 420, and one end of the central rod 420 is coupled and a fixing pin The movable part 440 through which the link is coupled and the movable force is transmitted through 441, the movable part 440 guides the linear movement of the movable part 440, and one end of the spring 410 is in contact with the movable part (440) and the guide portion 430 to allow the spring 410 to be compressed when the center rod 420 is displaced, and the spring 410 is coupled to the center rod 420 so as to contact the other end of the spring 410, and It includes an adjustment nut 450 that can adjust the compression force of (410).

Looking at a more specific structure, the guide portion 430 may have a cylindrical structure with one side blocked, and at this time, an insertion hole into which the central rod 420 can be inserted should be formed in the center of the blocked side.

The guide portion 430 is formed with a long long guide groove 431 in the longitudinal direction of the central rod 420, accommodated inside the guide portion 430 and coupled to one end of the central rod 420 Part of the side surface of the movable part 440 is exposed.

The movable part 440 is provided with a fixing pin 441 that can be coupled to a link, and is exposed through the guide groove 431.

Although the above is limited to the fixing pin 441, it can be implemented by changing into various forms such as a fixing hole can be easily modified and implemented by a person skilled in the art.

The spring 410 is inserted in a form surrounding the outside of the central rod 420 so that the central rod 420 is inserted in the center, and at this time, one end of the spring 410 is in contact with one surface of the guide part 430 Becomes.

The adjustment nut 450 is coupled to the other end of the center rod 420, and the other end of the spring 410 is coupled to the adjustment nut 450. At this time, the degree of compression of the spring 410 may be determined by adjusting the degree of coupling between the adjustment nut 450 and the center rod 420.

The contact spring device 400 having such a configuration has been changed to a position close to the VI side of the coupling position with the link to be described later, and various effects can be expected when applied to a circuit breaker according to the design change. .

6 is a schematic view of an open state (open) of a circuit breaker using a contact conversion device of the present invention, FIG. 7 is a detailed configuration diagram of a spring device for a contact in FIG. 6, and FIG. 8 is a circuit breaker using the contact conversion device of the present invention. It is a schematic diagram of a closed state, and FIG. 9 is a detailed configuration diagram of a contact spring device in FIG. 8.

5 to 9 respectively, the panel 100 provided on the front side of the enclosure 200 of the circuit breaker, and the manipulator 300 positioned in the enclosure 200 to generate a driving force and transmit it through the link 320 Wow, the VI rod 500 connected to the movable contact of the vacuum interrupter (VI, 600) and the VI rod (500) using the elastic restoring force of the spring 410 while being displaced according to the driving force of the manipulator (300). However, the link 320 is configured to include a contact spring device 400 coupled to one end side adjacent to the VI rod 500.

The panel 100 is openable, and the operator can check the spring device 400 for contact in the enclosure 200.

The manipulator 300 located in the enclosure 200 may include a motor and a reduction gear therein to drive the main shaft 310 in the vertical direction. As for the specific configuration of the inside of the manipulator 300, a manipulator of various known structures can be used.

In FIG. 6, the manipulator 300 moves the main shaft 310 downward, and FIG. 8 shows a state in which the main shaft 310 is moved upward.

The link 320 converts a vertical linear motion of the main shaft 310 into a horizontal linear motion with respect to the ground.

One end of the link 320 is connected to the end of the main shaft 310, the center is fixed to the fixed part provided in the enclosure 200, the other end to the movable part 440 of the contact spring device 400 Are combined.

As described above, the present invention has a difference in the position of the contact spring device 400 to which the link 320 is coupled unlike the conventional one. Specifically, in the related art, the link is coupled to the opposite side of the VI rod among both ends of the contact spring device, but in the present invention, the link is coupled to a position adjacent to the VI rod 500.

According to such a connection characteristic, an arrangement relationship between the manipulator 300 and the contact spring device 400 in the enclosure 200 is determined.

That is, compared to the prior art, the manipulator 300 must be moved to a position farther from the panel 100 in the enclosure 200, and the spring device 400 for contact is also relatively more in the panel 100. It will be located close together.

Therefore, the present invention does not require a support for supporting the manipulator, and thus space utilization of the enclosure 200 can be improved.

In addition, since the contact spring device 400 is located closer to the panel 100, the operator checks the contact spring device 400 or uses the adjustment nut 450 to adjust the compression force of the spring 410. It is characterized by easy operation such as adjustment.

Next, as shown in FIG. 8, in order to supply current to the load in a state in which the current is cut off, the manipulator 300 moves the main shaft 310 upward, and accordingly, the link 320 is the movable part 440 The movable part 440 is guided by the guide part 430 by transmitting a force to the VI so that it is displaced toward the VI 600.

At this time, the central rod 420 coupled to the movable part 440 and the adjustment nut 450 coupled to the other end of the central rod 420 are also displaced to the same degree in the same direction.

In a state in which one end of the spring 410 is in contact with the guide part 430, as the adjustment nut 450 in contact with the other end is displaced, it is compressed by the displacement.

At this time, the degree of compression can be measured by the displacement of the fixing pin 441, and the measurement unit 432 can be formed along the guide groove 431 so that the operator can easily measure without using other measurement tools. . The measurement unit 432 is assumed to be a scale at a predetermined interval.

That is, the spring 410 has a first length (X1) in a state where the movable contact and the fixed contact of the VI 600 are separated, and the spring for contact is moved upward according to the upward movement of the main shaft 310 of the manipulator 300. The device unit 400 is displaced to contact the movable contact point and the fixed contact point of the VI 600, and compresses the spring 410 to a second length X2 according to the displacement.

At this time, the difference between the first length (X1) and the second length (X2) is indicated by the compression length (W), and the compression length (W) can be directly checked with the naked eye through the measuring unit 432.

As described above, the present invention improves the space utilization of the enclosure 200 and adjusts the compression of the spring 410 by changing the position of the contact spring unit 400 coupled to the link 320 while having a stable function. It can be facilitated, and comparison with the initial setting state can be facilitated.

Although the embodiments according to the present invention have been described above, these are merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent ranges of embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

100: panel 200: enclosure
300: manipulator 310: main shaft
320: link 400: contact spring unit
410: spring 420: center rod
430: guide part 431: guide groove
432: measuring unit 440: moving unit
441: fixing pin 450: adjustment nut
500: VI load 600: VI

Claims (5)

A manipulator for linearly driving the main shaft to change the contact point of the vacuum interrupter;
A link having one end coupled to the main shaft of the manipulator to change the driving direction of the main shaft; And
In the contact conversion device comprising a contact spring unit for maintaining a contact force by pressing a spring in a state in which the contact is in contact with one end coupled to the link and converting the contact of the vacuum interrupter by displacement,
One end of the contact spring unit to which the link is coupled is a side adjacent to the vacuum interrupter.
The method of claim 1,
The contact spring device unit,
A spring positioned to surround the central rod;
A movable part to which one end of the center rod is coupled and the link is coupled through a fixing pin;
A guide part accommodating the movable part and guiding the linear movement, and allowing the spring to be compressed when the movable part and the center rod are displaced by contacting one end of the spring; And
A contact conversion device comprising an adjustment nut coupled to the center rod so as to contact the other end of the spring and capable of adjusting a compression force of the spring.
The method of claim 2,
The guide part,
It includes a guide groove exposing the fixing pin,
A contact conversion device further comprising a measuring unit capable of checking the displacement of the fixing pin moving along the guide groove.
The method of claim 1,
The above link is:
A contact conversion device, characterized in that the driving direction is changed so that the driving direction is perpendicular to the driving direction of the main shaft.
An enclosure with an openable panel installed on the front;
A manipulator that is accommodated in the enclosure and linearly drives the main shaft to change the contact point of the vacuum interrupter;
A link having one end coupled to the main shaft of the manipulator to change the driving direction of the main shaft; And
In the circuit breaker comprising a contact spring device for maintaining a contact force by compressing the spring in a state in which the contact is in contact with one end coupled to the link and converting the contact of the vacuum interrupter by displacement,
A circuit breaker, characterized in that one end of the contact spring device portion to which the link is coupled is a side adjacent to the vacuum interrupter.

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