KR20160003828U

KR20160003828U - Vacuum circuit breaker

Info

Publication number: KR20160003828U
Application number: KR2020150002727U
Authority: KR
Inventors: 조준연
Original assignee: 엘에스산전 주식회사
Priority date: 2015-04-27
Filing date: 2015-04-27
Publication date: 2016-11-04
Also published as: KR200489833Y1

Abstract

The present invention relates to a vacuum circuit breaker, and more particularly, to a vacuum circuit breaker having a push rod that moves up and down by a rotational force transmitted from an opening / closing shaft. And a contact pressure regulating member connected to the push rod and having a contact pressure spring to move the push rod in accordance with the rotation to compress the contact pressure spring to adjust the contact pressure.
The present invention has an effect that it is possible to easily adjust the contact amount without disassembling the vacuum circuit breaker by providing the contact pressure adjusting member on the push rod and adjusting the contact pressure amount of the contact pressure spring through the contact pressure adjusting member.

Description

{VACUUM CIRCUIT BREAKER}

The present invention relates to a vacuum circuit breaker, and more particularly, to a vacuum circuit breaker capable of adjusting a contact pressure applied to a vacuum interrupter by a contact spring without disassembling the circuit breaker.

Generally, the circuit breaker is built in the switchboard and is a device protection device for circuits used to cut off the fault current and energize the rated current on the line.

Such circuit-breakers may include, but are not limited to, an inlet circuit breaker using oil according to the soho medium, a gas circuit breaker using an inert gas, sulfur hexafluoride (SF ₆ ) gas, an air circuit breaker using air, And a vacuum circuit breaker using the same.

Among them, the vacuum circuit breaker plays a role of isolating the circuit quickly by opening arc in case of opening and closing of the load and fault current in the vacuum container, and it has a high insulation strength under a vacuum of 10 ^-3 Torr or less , It is mainly used among the middle-range pressure-class interrupters and has recently made considerable progress in high-voltage, large-current, and miniaturization.

2 is a plan view showing a vacuum circuit breaker. FIG. 3 is an enlarged view of a portion A of FIG. 2 in an open state, and FIG. Fig. 4 is an enlarged view of the portion A in Fig. 2 in the closed state.

1 to 4, a conventional vacuum circuit breaker includes a driving unit 10, a main circuit unit 20, and the like.

The driving unit 10 includes a driving mechanism 11 for driving the vacuum circuit breaker and an opening / closing shaft 12.

The main circuit unit 20 includes a push rod 21 for insulation, a connecting rod (not shown) coupled to the upper end of the push rod 21, a movable shaft 22 connected to the connecting rod, An interrupter 25, a frame 23 for supporting the main circuit unit 20, a terminal 24 coupled to one end of the frame 23, and the like.

The drive mechanism 11 of the vacuum circuit breaker rotates at a predetermined angle during the closing or opening operation (about + 8.5 deg. Upon closing and about -5.5 deg. When opening).

At this time, the opening and closing shaft 12 connected to the driving mechanism 11 also rotates, and the rotational motion of the opening and closing shaft 12 is converted into a translational motion through the push rod 21 connected to the opening and closing shaft 12 So that the internal contact of the vacuum interrupter 25 is operated on or off.

The vacuum circuit breaker has a gap GAP between the movable contact (not shown) and the fixed contact (not shown) of the vacuum interrupter 25 required in the open state according to its rating. Is reflected in the design of the vacuum circuit breaker.

At this time, a contact pressure spring (not shown) is provided in the push rod 21, and the contact pressure spring is contacted by a bending load of the opening / closing shaft 12 when the vacuum circuit breaker is closed, The vacuum interrupter 25 prevents the vacuum interrupter 25 from being opened due to the electromagnetic repulsion force in the state and transmits the force so that the vacuum interrupter 25 can be quickly opened in the cutoff state.

Therefore, the movement stroke for translating the main circuit portion 20 includes the stroke through the vacuum interrupter 25 and the contact pressure stroke of the contact spring in the push rod 21. [

In the case of the contact spring included in the vacuum circuit breaker constructed as described above, when adjusting the contact pressure, the contact pressure is adjusted by a certain degree of compression through the control nut 30, and then the connection plate 32 and the fixing nut 31 And finally adjust the contact pressure through the contact spring by fixing the lower side through the contact.

At this time, when the vacuum circuit breaker is used for a long time, the contacts of the movable contact and the fixed contact of the main circuit unit 20 are worn out and worn, and not only the stroke of the vacuum interrupter 25 is increased by the worn contact, The contact pressure stroke by the contact pressure spring provided is reduced.

Therefore, in the case of the vacuum interrupter used for a long time, it is necessary to readjust the contact pressure applied to the contact pressure spring through the adjustment nut 30. However, when the contact pressure is adjusted again, the fixing nut 31 and the connection plate 32, There is a problem in that it has to be disassembled.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vacuum circuit breaker capable of adjusting the amount of contact pressure applied to a vacuum interrupter by a contact pressure spring without disassembling the circuit breaker.

SUMMARY OF THE INVENTION The object of the present invention is to provide a push rod that moves up and down by a rotational force transmitted from an opening / closing shaft; And a contact pressure adjusting member connected to the push rod and having a contact pressure spring to move the push rod in accordance with the rotation to compress the contact pressure spring to adjust the contact amount.

Further, the contact pressure regulating member may include: an axis bar having an upper portion connected to the push rod; A body portion having a hollow to allow the shaft bar to pass therethrough; A first support plate positioned at an upper end of the body portion; A second support plate formed at a lower end of the body portion so as to be spaced apart from the first support plate by a predetermined distance; A contact spring disposed between the first support plate and the second support plate so as to surround the body and being compressed through the first support plate; And a shaft movement regulating member positioned below the second support plate to move the shaft bar in accordance with the rotation and move the push rod connected to the shaft bar to adjust the degree of compression of the contact pressure spring through the push rod .

In addition, when the nut is rotated, the shaft bar is rotated through the screw to move the push rod connected to the shaft bar. .

Further, a space portion is further formed inside the lower portion of the push rod to move the pressure adjusting member.

And a connecting plate disposed between the second supporting plate and the nut and connected to the opening and closing shaft to move the push rod according to the opening or closing of the driving unit.

Further, protrusions for connecting the opening and closing shafts are formed at both ends of the connecting plate.

And a scale is displayed on the outer peripheral surface of the shaft bar from the upper side to the lower side of the shaft bar.

As described above, the vacuum circuit breaker according to the present invention is provided with a contact pressure adjusting member on the push rod and adjusting the contact pressure of the contact spring through the contact pressure adjusting member, thereby making it possible to easily adjust the contact pressure without disassembling the vacuum circuit breaker .

Further, an arrow and a scale are displayed on the shaft movement adjusting member and the like, so that the amount of contact pressure required for the vacuum circuit breaker can be appropriately adjusted in a state of being recognized from the outside.

1 is a schematic view showing a conventional vacuum circuit breaker.
2 is a front view showing a conventional vacuum circuit breaker.
3 is an enlarged view of a portion A in Fig.
Fig. 4 is an enlarged view of a portion A in Fig. 2 in a state in which the vacuum circuit breaker is closed. Fig.
5 is a schematic view showing a vacuum circuit breaker according to the present invention;
6 is a front view showing a vacuum circuit breaker according to the present invention;
7 is an enlarged view of a portion B in Fig. 6; Fig.
8 is a sectional view showing a main circuit part of a vacuum circuit breaker according to the present invention;
9 is a cross-sectional view showing a push rod and a contact pressure adjusting member provided in a vacuum circuit breaker according to the present invention.

Hereinafter, a vacuum circuit breaker according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

6 is a front view showing a vacuum circuit breaker according to the present invention, FIG. 7 is an enlarged view of a portion B in FIG. 6, and FIG. 8 is an enlarged view of a vacuum circuit breaker according to the present invention FIG. 9 is a cross-sectional view showing a push rod and a contact pressure adjusting member provided in a vacuum circuit breaker according to the present invention. FIG.

5 to 9, the vacuum circuit breaker 100 according to the present invention includes a driving unit 110, a rotating shaft 120 disposed in the driving unit 110, an opening / closing shaft 130 connected to the rotating shaft 120, A push rod 140, a connecting rod 200 connected to the push rod 140, a movable shaft 170 connected to the connecting rod 200, a vacuum interrupter 180, a contact pressure adjusting member 150, (190), and the like.

The driving unit 110 provides a driving force to the opening and closing shaft 130 to open or close the main circuit unit of the vacuum circuit breaker 100.

At this time, when one end of the opening and closing shaft 130 is rotatably connected to the rotating shaft 120 so that the vacuum breaker 100 is put in the closed state, the opening and closing shaft 130 is bent through the driving force of the driving unit 110, The pushing amount adjusting member 150 is pushed and the push rod 140 is moved.

The push rod 140 is connected to the contact pressure regulating member 150 and the connecting rod 200 and moves up and down while receiving the bending load of the opening and closing shaft 130 when the vacuum breaker 100 is inserted, So that the connecting rod 200 connected to the push rod 140 and the movable shaft 170 are moved in conjunction with each other.

A space 141 is formed in the lower portion of the push rod 140 so that when the push rod 140 moves, the contact volume adjusting member 150 is inserted into the space 141, 140, the contact pressure is adjusted.

The contact pressure regulating member 150 is located near the push rod 140 and moves the push rod 140 according to the bending motion of the opening and closing shaft 130 in a state of being connected to the opening and closing shaft 130 But the abutment amount is adjusted by abutting against the push rod 140 according to the operation of the user.

8 and 9, the contact pressure regulating member 150 includes an axial bar 151, a body portion 153, a first support plate 155, a second support plate 157, a contact pressure spring 159), and an axial movement adjusting member (161).

An upper portion of the shaft bar 151 is connected to the push rod 140 to move together with the push rod 140, and a screw is formed on an outer circumferential surface thereof.

The body portion 153 has a cylindrical shape and is hollowed to penetrate the push rod 140 along the longitudinal direction.

A screw is formed on an inner circumferential surface of the body portion 153 to be engaged with the screw formed on the shaft bar 151.

The first support plate 155 is positioned at the upper end of the body portion 153 and when the push rod 140 moves as the axis movement adjusting member 161 rotates, The contact spring 159 is compressed in the same direction as the moving direction of the push rod 140 while moving in the moving direction of the push rod 140. [

The second support plate 157 is located at the lower end of the body portion 153 and supports the contact pressure spring 159 from below.

The contact spring 159 is positioned between the first support plate 155 and the second support plate 157 so as to surround the body portion 153 and rotates the shaft movement regulating member 161, The rod 140 moves and is compressed or uncompressed through the first support plate 155.

The shaft movement regulating member 161 has a nut shape and is disposed below the second support plate 157 and is connected to the shaft bar 151 so as to be pierced by the shaft 151 The push rod 140 connected to the shaft bar 151 is moved.

A connection plate 163 is further formed between the second support plate 157 and the shaft movement adjusting member 161 to adjust the movement of the push rod 140 according to the state of the driving unit 110 being opened or closed do.

The connection plate 163 is connected to the opening and closing shaft 130 located at the driving unit 110 and pushes up the push rod 140 while moving according to the bending motion of the opening and closing shaft 130. The vacuum interrupter 180 And the contact of the fixed contact and the movable contact.

The protrusion 163a is formed at both sides of the connection plate 163 so that the connection plate 163 is connected to the protrusion 163a through the bending load of the opening and closing shaft 130 in a state where the opening and closing shaft 130 is connected to the protrusion 163a. So that the push rod 140 is pushed.

Hereinafter, the process of adjusting the contact pressure of the vacuum circuit breaker 100 according to the present invention will be described in detail.

When the user moves the shaft movement adjusting member 161 closely attached to the lower surface of the connecting plate 163, the shaft bar 151 screwed to the shaft movement adjusting member 161 moves in the longitudinal direction of the push rod 140 And the push rod 140 connected to the shaft bar 151 is also moved in conjunction with the shaft bar 151.

When the push rod 140 moves, the first support plate 155 abuts against the lower surface of the push rod 140 through the space and at the same time, moves in the same direction as the movement direction of the push rod 140 through the push rod 140 And compresses the contact pressure spring 159 while moving.

By adjusting the degree of compression of the contact spring 159 that provides the elastic force to the push rod 140 through the degree of rotation of the axial movement adjusting member 161 through the above process, The amount of contact force applied to the vacuum circuit breaker 100 is adjusted. Accordingly, it is possible to appropriately adjust the contact pressure to match the state of the vacuum circuit breaker 100 without disassembling the vacuum circuit breaker 100.

In addition, a scale is displayed on the outer circumferential surface of the shaft bar 151 from the upper side to the lower side of the shaft bar 151, so that the degree of movement of the shaft bar 151 can easily be confirmed from the outside through the scale.

That is, when the shaft movement adjusting member 161 is rotated, the shaft shaft 151 moves downward. The degree of movement of the shaft shaft 151 is checked through the scale, The degree of compression of the contact pressure spring 159 through the push rod 140 can easily be confirmed from outside.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not for the purpose of limitation. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

10: driving unit 11:
12: opening / closing shaft 20: main circuit part
21: push rod 22: movable shaft
23: Frame 24: Terminal
30: Adjusting nut 31: Fixing nut
32: connecting plate 100: vacuum circuit breaker
110: driving part 120:
130: opening and closing shaft 140: push rod
141: space part 150: contact pressure adjusting member
151: Axial bar 153:
155: first support plate 157: second support plate
159: Contact spring 161: Axis movement adjusting member
163: Connection plate 163a:
170: movable shaft 180: vacuum interrupter
190: Terminal 200: Connecting rod

Claims

A push rod that moves up and down by a rotational force transmitted from an opening / closing shaft; And
A contact pressure regulating member connected to the push rod and having a contact pressure spring to move the push rod in accordance with the rotation to compress the contact pressure spring to adjust the contact amount;
.

The method according to claim 1,
The contact pressure adjusting member
An upper shaft connected to the push rod;
A body portion having a hollow to allow the shaft bar to pass therethrough;
A first support plate positioned at an upper end of the body portion;
A second support plate formed at a lower end of the body portion so as to be spaced apart from the first support plate by a predetermined distance;
A contact spring disposed between the first support plate and the second support plate so as to surround the body and being compressed through the first support plate; And
An axis bar movement adjusting member positioned below the second support plate to move the shaft bar according to the rotation and move the push rod connected to the shaft bar to adjust the degree of compression of the contact spring through the push rod;
.

3. The method of claim 2,
The shaft movement regulating member Nut,
A screw is formed on an outer circumferential surface of the shaft bar and an inner circumferential surface of the body portion,
Wherein when the nut is rotated, the shaft bar rotates through the screw to move the push rod connected to the shaft bar.

3. The method of claim 2,
And a space portion is further formed inside the lower portion of the push rod to move the pressure adjusting member.

3. The method of claim 2,
And a connection plate disposed between the second support plate and the nut portion and connected to the opening and closing shaft to move the push rod according to the opening or closing of the driving unit.

6. The method of claim 5,
And a protrusion for connecting the opening and closing shafts is formed at both ends of the connecting plate.

3. The method of claim 2,
And a scale is displayed on the outer peripheral surface of the shaft bar from the upper side to the lower side of the shaft bar.