KR102284917B1 - Earthing switch - Google Patents

Abstract

The invention related to a grounding switch is disclosed. A grounding switch according to the present invention includes: a housing; a movable part mounted on the housing; a fluid accommodating part mounted on the movable part and accommodating the fluid in the internal space; a movable rod part movably mounted on the fluid accommodating part, and guiding the fluid accommodated in the fluid accommodating part to be discharged to the outside by pressurizing the fluid while moving; a fixed part disposed opposite the movable part and receiving the movable rod part; and an arc induction part which is disposed to protrude more toward the movable rod than the fixed part in the fixed part, is detachably coupled to the movable rod part, and receives the fluid discharged through the movable rod part when separated from the movable rod part. characterized.

Description

Earthing switch {EARTHING SWITCH}

The present invention relates to a grounding switch, and more particularly, to a grounding switch capable of extinguishing an arc by compressing the fluid of the fluid receiving unit and disposing of an arc inducing unit on the flow path of the fluid when the fluid is sprayed through the discharge hole of the movable rod. it's about

A grounding switchgear is a switch that maintains the grounding state of GIS (Gas Insulated Switchgear) equipment.

In the prior art, the grounding switch cuts off the induced current or voltage by applying an insulating gas. Such a grounding switch has a problem in that switching performance is not sufficiently secured depending on the composition of the insulating gas. Therefore, there is a need to improve it.

Background art of the present invention is disclosed in Republic of Korea Utility Model Registration No. 20-0453411 (registered on April 21, 2011, title of design: grounding switch of gas insulated switchgear).

The present invention was created to solve the above problems, and an object of the present invention is to compress the fluid of the fluid receiving part and arrange an arc inducing part on the flow path of the fluid when the fluid is injected through the discharge hole part of the movable rod part to reduce the arc. It is to provide a grounding switch that can be extinguished.

A grounding switch according to the present invention includes: a housing; a movable part mounted on the housing; a fluid accommodating part mounted on the movable part and accommodating a fluid in the internal space; a movable rod part movably mounted on the fluid accommodating part and guiding the fluid accommodated in the fluid accommodating part to be discharged to the outside by pressurizing the fluid while moving; a fixing part disposed opposite the movable part and receiving the movable rod part; and the fixed portion is disposed to protrude more toward the movable rod portion than the fixed portion, is detachably coupled to the movable rod portion, and provides the fluid discharged through the movable rod portion when separated from the movable rod portion Includes a receiving arc induction part.

The arc induction part in the present invention, the arc induction fastening part fixed to the fixing part; an elastic incision portion protruding from the arc induction fastening portion toward the movable rod portion and having at least one slit portion; and a protrusion formed at an end of the elastic incision and in contact with the inner surface of the movable rod.

In the present invention, the protrusion is formed to protrude toward the inner surface of the movable rod portion than the elastic incision portion.

In the present invention, the movable rod portion, the movable rod body portion movably mounted to the fluid receiving portion; It is formed extending from the movable rod body to the arc inducing part, is detachably coupled to the protrusion, and has a communication hole communicating with the fluid receiving part, and when separated from the protrusion, the fluid is discharged to the arc inducing part. a fluid guide unit for guiding; a pressing part extending on one side of the fluid guide part and pressing the fluid inside the fluid accommodating part when the movable rod body part moves; and a lever part connected to the movable rod body and configured to move the movable rod body.

In the present invention, the pressing portion is formed to protrude from the outer surface of the fluid guide portion toward the inner surface of the fluid receiving portion in an annular shape.

In the present invention, the lever part includes a link part connected to the movable rod body part; a lever body rotatably connected to the link unit; and a power transmission unit having one side connected to the lever body and the other side rotatably connected to the driving unit to be rotated by the operation of the driving unit.

In the present invention, the link portion is rotatably connected to the lever body portion and the movable rod body portion, respectively.

In the present invention, the link part includes an insulating material.

In the present invention, the movable part is fixed to the housing, the movable body part to which the movable rod part is movably mounted; and a movable shield part mounted to surround the movable body part and disposed opposite to the fixed part.

In the present invention, the fixing portion, the fixed body portion connected to the ground, the arc induction fastening portion is mounted; a fixed terminal part mounted on the fixed body part and electrically connected to the ground; and a fixed shield portion mounted to surround the fixed terminal portion and disposed to face the movable shield portion.

In the present invention, the protrusion is formed to protrude toward the movable rod portion from the fixed body portion than the fixed terminal portion.

According to the grounding switch according to the present invention, the arc inducing unit is disposed on the flow path of the fluid when the fluid of the fluid receiving unit is compressed and the fluid is sprayed through the movable rod unit, so that the arc can be extinguished in a short time to improve the blocking performance.

In addition, according to the present invention, it is possible to improve the opening/closing performance by compressing the fluid of the fluid receiving part and injecting the fluid through the fluid guide part of the movable rod part.

In addition, according to the present invention, the fluid in the internal space of the fluid receiving part is compressed through the pressurizing part of the movable rod part and discharged along the fluid guide part, so that the discharge speed can be improved.

1 is a conceptual diagram schematically showing a grounding switch according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing a grounding switch according to an embodiment of the present invention.
3 is a perspective view schematically showing an arc induction unit in a grounding switch according to an embodiment of the present invention.
4 is a cross-sectional view schematically illustrating a state in which the grounding switch according to an embodiment of the present invention is being opened.
FIG. 5 is a partially enlarged view schematically showing "A" of FIG. 4 .
6 is a cross-sectional view schematically showing an open state of a grounding switch according to an embodiment of the present invention.
7 is a conceptual diagram schematically illustrating an operation of a grounding switch according to an embodiment of the present invention.

Hereinafter, an embodiment of a grounding switch according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, definitions of these terms should be made based on the content throughout this specification.

1 is a conceptual diagram schematically showing a grounding switch according to an embodiment of the present invention, FIG. 2 is a cross-sectional view schematically showing a grounding switch according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention A perspective view schematically showing an arc induction part in a grounding switch according to the present invention, FIG. 4 is a cross-sectional view schematically showing a state in which the grounding switch according to an embodiment of the present invention is being opened, and FIG. 5 is a schematic representation of "A" in FIG. It is a partially enlarged view, and FIG. 6 is a cross-sectional view schematically showing an open state of the grounding switch according to an embodiment of the present invention, and FIG. 7 is a conceptual diagram schematically showing the operation of the grounding switch according to an embodiment of the present invention. .

1 to 7 , the grounding switch according to an embodiment of the present invention includes a housing 100 , a movable part 200 , a fluid receiving part 300 , a movable rod part 400 , a fixed part 500 , It includes an arc induction unit (600).

The housing 100 provides a space in which the movable rod part 400 can move, and one side (the left side of FIG. 1 ) of the housing 100 is formed to be open, and the lever part 440 of the movable rod part 400 is opened. is connected to the driving unit 700 disposed outside the housing 100 .

The movable part 200 is mounted on the housing 100 . The movable part 200 may be electrically connected to a circuit breaker (not shown). The movable part 200 includes a movable body part 210 and a movable shield part 220 .

The movable body 210 is fixed to one side (lower side of FIG. 1 ) of the housing 100 , and the movable rod 400 is movably mounted. The movable shield part 220 is mounted to surround the movable body part 210 , and is disposed to face the fixed part 500 . The movable shield part 220 protects the movable rod part 400 moving through the movable body part 210 from the outside. The movable shield part 220 is formed so that the movable rod part 400 is retractable toward the fixed part 500 side. The movable shield 220 includes a metal material.

The fluid receiving part 300 is mounted on the movable body part 210 of the movable part 200 , and is accommodated in the inner space of the housing 100 . The fluid accommodating part 300 accommodates the fluid 10 in the internal space. In the present invention, the fluid 10 accommodated in the fluid receiving unit 300 may be made of an insulating gas (dry air, SF6 gas). The fluid 10 accommodated in the fluid accommodating part 300 is discharged toward the fixed part 500 through the movable rod part 400 .

The movable rod part 400 is movably mounted inside the fluid accommodating part 300, and while moving, pressurizes the fluid 10 accommodated in the fluid accommodating part 300, and guides it to be discharged toward the external arc inducing part 600. do.

The movable rod part 400 includes a movable rod body part 410 , a fluid guide part 420 , a pressing part 430 , and a lever part 440 . The movable rod body 410 is movably mounted to the fluid receiving part 300 .

The movable rod body 410 is movably mounted in the inner space of the fluid receiving part 300 . The fluid guide part 420 is formed extending from the movable rod body part 410 to the arc induction part 600 side. The fluid guide part 420 is detachably coupled to the protrusion 630 of the arc induction part 600 . The end of the fluid guide part 420 (the lower end of FIG. 2 ) is mounted between the protrusion 630 of the arc induction part 600 and the fixed shield part 530 of the fixing part 500 to provide the fixed shield part 530 . to close The fluid guide part 420 may be separated from the protrusion part 630 and the fixed shield part 530 .

The fluid guide unit 420 includes a communication hole 421 communicating with the fluid receiving unit 300 . When the fluid guide part 420 is separated from the protrusion 630 of the arc induction part 600, the fluid guide part 420 communicates with the fluid receiving part 300 through the communication hole part 421, the arc induction part 600 Guide the discharge of the fluid 10 of the fluid receiving part 300 to the side.

The pressurizing part 430 is formed to extend on one side (the upper part of FIG. 2 ) of the fluid guide part 420 , and presses the fluid 10 inside the fluid accommodating part 300 when the movable rod body part 410 moves. The pressurizing part 430 is disposed below the fluid accommodating part 300 and pressurizes the fluid 10 accommodated in the fluid accommodating part 300 while moving upwards of the fluid accommodating part 300 .

The pressing part 430 is formed to protrude from the outer surface of the fluid guide part 420 toward the inner surface of the fluid receiving part 300 in an annular shape. The pressurizing part 430 is formed in contact with the inner surface of the fluid receiving part 300 . The pressurizing unit 430 presses the fluid 10 accommodated in the fluid receiving unit 300 while moving from the lower side to the upper side of the fluid receiving unit 300 .

The lever part 440 is connected to the movable rod body part 410 and causes the movable rod body part 410 to move. The lever unit 440 is connected to the driving unit 700 , and moves the movable rod body 410 of the movable rod unit 4100 upward by the operation of the driving unit 700 .

The lever part 440 includes a link part 441 , a lever body part 443 , and a power transmission part 445 . The link part 441 is connected to one side (upper side of FIG. 2 ) of the movable rod body part 410 . The lever body part 443 is rotatably connected to the link part 441 .

One side (the right side of FIG. 1 ) of the power transmission unit 445 is connected to the lever body part 443 , and the other side (the left side of FIG. 1 ) is rotatably connected to the driving unit 700 . The power transmission unit 445 is rotated by the operation of the driving unit 700 . The driving unit 700 is a power means for rotating the power transmission unit 445 , and rotates the power transmission unit 445 in one direction (clockwise based on FIG. 1 ) or the other direction (counterclockwise based on FIG. 5 ). The driving unit 700 rotates the power transmission unit 445 according to an open or close signal received from a control unit (not shown).

In the present invention, the link portion 441 is rotatably connected to the lever body portion 443 and the movable rod body portion 410, respectively. The link part 441 is connected to the lever body part 443 and the movable rod dome body part 410 by hinges or pins, respectively. The link unit 441 moves the movable rod body 410 upward or downward according to the rotation of the driving unit 700 through the power transmission unit 445 and the lever body 443 . The movable rod body 410 is accommodated in the fluid accommodating part 300, and linearly moves in the vertical direction.

In the present invention, the link portion 441 includes an insulating material. The link part 441 may include an insulating material, and may block transmission of sparks to the movable rod part 400 through the link part 441 . The link part 441 is made of an insulating material and includes rubber, silicon, and the like.

The fixed part 500 is disposed to face the movable part 200 , and accommodates the movable rod part 400 . When the fixed part 500 is separated from the movable rod part 400 , the fluid 10 discharged through the movable rod part 400 is braked toward the arc induction part 600 mounted inside the fixed part 500 .

The fixed part 500 includes a fixed body part 510 , a fixed terminal part 520 , and a fixed shield part 530 . The fixed body 510 is connected to the ground (not shown). The fixed body part 510 is equipped with an arc induction fastening part 610 of the arc induction part 600 .

The fixed terminal unit 520 is mounted on the fixed body unit 510 and is electrically connected to the ground. When residual charges flow into the fixed terminal unit 520 , the fixed terminal unit 520 may transfer the residual charges to the ground.

The fixed shield unit 530 is mounted to surround the fixed terminal unit 510 , and is disposed to face the movable shield unit 220 . The fixed shield unit 530 protects the fixed terminal unit 510 from the outside. The fixed shield unit 530 is formed to open so that the fixed terminal unit 520 is exposed toward the movable unit 200 . The fixed shield unit 530 includes a metal material.

The arc induction part 600 is disposed to protrude more toward the movable rod part 400 than the fixed part 500 to the fixing part 500, and is detachably coupled to the movable rod part 400, and the movable rod part ( When separated from the 400), the fluid 10 discharged through the movable rod part 400 is provided.

The arc induction part 600 is formed to protrude more toward the movable rod part 400 than the fixed part 500 , and is finally separated from the movable rod part 400 . When separated from the movable rod 400 , an arc is generated in the arc induction unit 600 .

When the fluid 10 is injected through the fluid guide part 420 of the movable rod part 400, the arc induction part 600 is disposed on the flow path of the fluid 10, so that it is injected through the fluid guide part 420. The fluid 10 can extinguish the arc formed in the arc induction unit 600 quickly, thereby improving the blocking performance of the grounding switch.

The arc induction part 600 includes an arc induction fastening part 610 , an elastic incision part 620 , and a protrusion part 630 . The arc induction fastening part 610 is fixed to the fixed body part 510 of the fixing part 500 . The arc induction fastening part 610 is screwed to the fixed body part 510 of the fixing part 500, so that assembly, repair and maintenance can be made easily.

The elastic cutout 620 protrudes from the arc induction fastening part 610 toward the movable rod 400 side, and includes at least one cut-out slit part 621 . The elastic incision portion 620 is provided with at least one slit portion 621 and elastically deforms when coupled with the fluid guide portion 420 of the movable rod portion 400 to provide an elastic restoring force to the fluid guide portion 420 . .

In FIG. 3 of the present invention, an example in which one slit portion 621 of the elastic cutout 620 is formed is shown. One slit portion 621 is formed so that the flat cross-section of the elastic incision portion 620 is formed in a straight line, but is not limited thereto.

When two slits 621 of the elastic incision 620 are formed, the flat cross-section of the elastic incision 620 may be formed in a cross shape. In consideration of the coupling between the protrusion 630 of the arc inducing part 600 and the fluid guide part 420 of the movable rod part 400 , the number of the slit parts 621 of the elastic incision part 620 may be changed.

The protrusion 630 is formed at the end (the upper end of FIG. 3 ) of the elastic cutout 620 , and is in contact with the inner surface of the fluid guide part 420 of the movable rod 400 . The protrusion 630 is in close contact with the inner surface of the fluid guide part 420 of the movable rod part 400 by the elastic restoring force of the elastic incision part 620 .

The protrusion 630 is formed to protrude toward the inner surface of the fluid guide portion 420 of the movable rod portion 400 than the elastic incision portion 620 . The protrusion 630 is formed to protrude more than the elastic cutout 620 , so that the adhesion of the inner surface of the fluid guide part 420 of the movable rod part 400 can be improved.

The protrusion 630 is formed to protrude from the fixed body 510 toward the movable rod 400 rather than the fixed terminal 520 (see FIG. 5 ). The protrusion 630 is formed to protrude toward the movable rod 400 than the fixed terminal 520 , and is finally separated from the fluid guide 420 of the movable rod 400 rather than the fixed terminal 520 . At this time, an arc is generated in the fluid guide part 420 of the movable rod part 400 and the protrusion part 630 which is finally separated.

Accordingly, the arc induction unit 600 disposed on the path through which the fluid 10 is discharged from the fluid guide 420 is disposed, and the arc induction unit 600 is formed by the fluid 10 discharged from the fluid guide unit 420 . The arc formed on the protrusion 630 is extinguished.

The operation of the grounding switch according to an embodiment of the present invention having the above-described configuration will be described.

When an open signal is transmitted from the control unit, the driving unit 500 rotates the lever unit 440 in a counterclockwise direction (refer to FIG. 7 ). In the lever part 440 , the power transmission part 445 , the rare body part 443 , and the link part 441 are sequentially rotated.

By rotation of the lever part 440, the movable rod part 400 movably mounted inside the fluid receiving part 400 is moved upward. At this time, the fluid 10 accommodated in the fluid accommodating part 300 through the communication hole 421 is discharged to the arc guiding part 600 along the fluid guide part 420, and formed in the protrusion 630 of the arc guiding part 600. extinguish the arc

To facilitate the discharge of the fluid 10 to the fluid guide part 420 , when the movable rod body part 410 moves upward, the pressurizing part 430 presses the fluid 10 of the fluid receiving part 300 . The movement of the fluid 10 is promoted through the communication hole 421 .

When the movable rod part 400 is separated from the fixed part 500 by the above-described operation, the fluid 10 is easily discharged.

When the closing signal is transmitted from the control unit, the driving unit 500 rotates the lever unit 440 in a clockwise direction (refer to FIG. 1 ). In the lever part 440 , the power transmission part 445 , the rare body part 443 , and the link part 441 are sequentially rotated. Contrary to the closing sequence described above, the movable rod 400 is mounted on the fixed part 500 while descending.

According to the grounding switch according to the present invention, the arc induction unit 600 on the flow path of the fluid 10 when the fluid 10 of the fluid receiving unit 300 is compressed and the fluid 10 is sprayed through the movable rod unit 400 . ) is arranged, the arc can be extinguished in a short time to improve the blocking performance.

In addition, according to the present invention, the opening and closing performance can be improved by compressing the fluid 10 of the fluid accommodating part 300 and injecting the fluid 10 through the fluid guide part 420 of the movable rod part 400 .

In addition, according to the present invention, the fluid 10 in the internal space of the fluid accommodating part 300 is discharged along the fluid guide part 420 while being compressed through the pressing part 430 of the movable rod part 400 to increase the discharge speed. can be improved

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and various modifications and equivalent other embodiments are possible therefrom by those of ordinary skill in the art. will understand Therefore, the true technical protection scope of the present invention should be defined by the following claims.

10: fluid
100: housing 200: movable part
210: movable body part 220: movable shield part
300: fluid receiving part 400: movable rod part
410: movable rod body portion 420: fluid guide portion
421: communication hole 430: pressurized part
440: lever part 441: link part
443: lever body 445: power transmission unit
500: fixed portion 510: fixed body portion
520: fixed terminal portion 530: fixed shield portion
600: arc induction part 610: arc induction fastening part
620: elastic incision 621: slit portion
630: protrusion 700: driving unit

Claims (11)

housing;
a movable part mounted on the housing;
a fluid accommodating part mounted on the movable part and accommodating a fluid in the internal space;
a movable rod part movably mounted on the fluid accommodating part and guiding the fluid accommodated in the fluid accommodating part to be discharged to the outside by pressurizing the fluid while moving;
a fixing part disposed opposite the movable part and receiving the movable rod part; and
The fixed portion is disposed to protrude more toward the movable rod portion than the fixed portion, is detachably coupled to the movable rod portion, and is provided with the fluid discharged through the movable rod portion when separated from the movable rod portion including an arc induction part,
The arc induction unit,
an arc induction fastening part fixed to the fixing part;
an elastic incision portion protruding from the arc induction fastening portion toward the movable rod portion and having at least one slit portion; and
It is formed at the end of the elastic incision, and includes a protrusion in contact with the inner surface of the movable rod portion,
The fixing part,
It is connected to the ground and includes a fixed body part to which the arc induction fastening part is mounted,
A thread is formed on the outer surface of the end of the arc induction fastening part,
The arc induction fastening part is a grounding switch, characterized in that it is fixed by screwing the fixed body part.
delete According to claim 1,
The grounding switch, characterized in that the protrusion is formed to protrude toward the inner surface of the movable rod portion than the elastic cutout.
According to claim 1,
The movable rod part,
a movable rod body movably mounted to the fluid receiving part;
It is formed extending from the movable rod body to the arc inducing part, is detachably coupled to the protrusion, and has a communication hole communicating with the fluid receiving part, and when separated from the protrusion, the fluid is discharged to the arc inducing part. a fluid guide unit for guiding;
a pressing part extending on one side of the fluid guide part and pressing the fluid inside the fluid accommodating part when the movable rod body part moves; and
and a lever connected to the movable rod body and configured to move the movable rod body.
5. The method of claim 4,
The grounding switch, characterized in that the pressurizing portion is formed to protrude from the outer surface of the fluid guide portion toward the inner surface of the fluid receiving portion in an annular shape.
5. The method of claim 4,
The lever part,
a link part connected to the movable rod body part;
a lever body rotatably connected to the link unit; and
and a power transmission unit having one side connected to the lever body portion and the other side rotatably connected to the driving unit to be rotated by the operation of the driving unit.
7. The method of claim 6,
The link unit is a ground switch, characterized in that rotatably connected to the lever body and the movable rod body, respectively.
7. The method of claim 6,
The link part is a grounding switch, characterized in that it comprises an insulating material.
According to claim 1,
The movable part,
a movable body part fixed to the housing and movably mounted to the movable rod part; and
and a movable shield part mounted to surround the movable body part and disposed to face the fixed part.
10. The method of claim 9,
The fixing part,
a fixed terminal part mounted on the fixed body part and electrically connected to the ground; and
and a fixed shield part mounted to surround the fixed terminal part and disposed to face the movable shield part.
11. The method of claim 10,
The grounding switch, characterized in that the protrusion is formed to protrude toward the movable rod portion than the fixed terminal portion from the fixed body portion.

Images