KR20160130899A

KR20160130899A - Air circuit breaker

Info

Publication number: KR20160130899A
Application number: KR1020150062617A
Authority: KR
Inventors: 박종덕
Original assignee: 현대중공업 주식회사
Priority date: 2015-05-04
Filing date: 2015-05-04
Publication date: 2016-11-15
Also published as: KR101734046B1

Abstract

A connecting member driving part having a charging rod for starting the charging operation of the electrode bar of the connecting member, and an operation starting member provided adjacent to the connecting member driving part and slidably movable, And an interlock unit which is connected to move the closing rod to prevent the closing operation of the connecting member when the inlet and outlet are driven.

Description

Breaker {AIR CIRCUIT BREAKER}

The present invention relates to a circuit breaker.

Generally, a breaker is an industrial power device that automatically cuts off a line when a fault current such as an overcurrent or a short-circuit current occurs in a transmission line having a relatively low voltage, and extinguishes an arc generated when the line is broken by using compressed air.

The breaker largely performs a closing operation for closing the energizing circuit and a closing operation for opening the energizing circuit. The closing and closing operation of the circuit breaker is generally performed automatically or according to the user's selection according to the state of the energizing circuit.

The circuit breaker includes a cradle that is installed to be able to be drawn out to the enclosure, a cradle draw-in and out apparatus that is installed in the cradle for pulling out and out of the cradle, and a connection member driver Respectively.

However, when the connection member driving portion is driven and the closing operation is performed during the cradle pull-in / out operation, there is a problem that a fault current such as an overcurrent is generated and the breaker is broken.

Therefore, there is a need for a structure that can prevent the operation of the connection member driving portion during use of the cradle pull-in and pull-out.

Korean Patent Publication No. 2011-0106737

There is provided a circuit breaker capable of preventing the operation of the connecting member driving portion during use of the draw-out portion.

The circuit breaker according to an embodiment of the present invention includes: a connection member driving unit having a charging rod for starting the charging operation of the electrode bar of the connection member; and an operation start member disposed adjacent to the connection member driving unit, And an interlock unit connected to the operation start member and configured to move the closing rod when the drawer is driven to prevent the closing operation of the connecting member.

The interlock unit includes an ascending / descending member which is installed to be able to move up and down in the case of the draw-out portion, a pivoting member whose one end is provided at the end of the elevating member, and the other end of which is rotated And a connection axis.

The interlock unit may further include a spring, one end of which is installed in the drawer case and the other end is installed in the elevating member.

The connection member driving unit may include a blocking latch lever connected to the connection shaft, a closing lever rotated or restricted by rotation of the blocking latch lever, and a closing lever coupled to the closing lever and the closing rod, The connection rod may be moved to prevent driving of the connection member driving unit.

The blocking latch lever is connected to the spring for the blocking latch lever so that when the locking is released, the closing lever can be rotated.

The closing lever may be connected to the closing lever spring and rotated when the restriction by the blocking latch lever is released to move the closing rod to a position where the connection member can be driven.

The elevating member may have an inclined surface which is brought into contact with a protruding jaw formed on the operation starting member and is moved up and down by the movement of the operation starting member.

A guide hole may be formed in the elevating member to guide the elevating path of the elevating member by inserting the guide protrusion of the elevating and lowering case.

There is an effect that the operation of the connecting member driving unit during the use of the drawer unit can be prevented.

1 is a schematic perspective view showing an internal portion of a circuit breaker according to an embodiment of the present invention.
2 is a perspective view showing an interlocking unit and an interlocking unit of a circuit breaker according to an embodiment of the present invention.
3 is an explanatory view showing a connection structure of a connection member driving part and an interlock unit of a circuit breaker according to an embodiment of the present invention.
4 and 5 are explanatory views for explaining operation of the circuit breaker according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.

FIG. 2 is a perspective view showing an interlocking unit of a circuit breaker according to an embodiment of the present invention. FIG. 3 is a perspective view of the breaker according to the present invention Fig. 3 is a diagram illustrating a connection structure of a connection member driving unit and an interlock unit of a circuit breaker according to an embodiment of the present invention.

1 to 3, a circuit breaker 100 according to an embodiment of the present invention may include a connection member driving unit 120, a lead-out unit 140, and an interlock unit 160 have.

The connecting member driving part 120, the pull-out part 140 and the interlock unit 160 are installed in the cradle body 110 and are connected to the connecting member driving part 120, .

The connection member driving part 120 has a charging rod 122 for starting the charging operation of an electrode bar (not shown) of a connecting member (not shown).

Meanwhile, the connection member driving unit 120 has a structure having a power transmission structure, and serves to transmit a driving force for closing the connection member from the electrode bar when the connection member is inserted into the electrode bar or when a fault current is generated.

Then, the loading rod 122 plays a role of starting the closing operation of the connecting member. That is, the closing operation of the connecting member 102 is started by rotating the stopper shaft (not shown) connected to the driving pushing member 124 by rotating the driving pushing member 124 by the closing rod 122.

The input rod 122 is rotatably installed on the side wall member 120a of the connection member driving unit 120 and may be connected to the input button 70. [

The connecting member driving unit 120 includes a blocking latch lever 128 connected to the connection shaft and a closing lever 130 and a closing lever 130 which are rotated or restricted by rotation of the blocking latch lever 128 And a blocking connecting rod 132 for connecting the charging rod 122 and moving the charging rod 122 when the rotation is restricted by the blocking latch lever 128 to prevent the driving of the connection member driving part 120 .

The blocking latch lever 128 is connected to the spring 128a for the blocking latch lever so that when the locking is released, the locking lever 130 rotates.

The closing lever 130 is connected to the spring 130a for the closing lever 130 and rotated when the restriction by the blocking latch lever 128 is released so that the closing rod 122 is moved to a position where the connecting member 102 can be driven .

At this time, the closing rod 122 is rotated by the closing connecting rod 132. That is, the closing lever 132, which has one end connected to the closing lever 130 and the other end connected to the closing rod 122, rotates the closing lever 130 and the closing rod 122 in an interlocking manner.

The blocking latch lever 128 and the closing lever 130 are installed on the first and second rotating shafts 128b and 130b and rotate in conjunction with the first and second rotating shafts 128b and 130b.

The pull-out portion 140 is disposed adjacent to the connection member driving portion 120 and includes an operation start member 142 slidably provided.

The pull-out portion 140 plays a role of allowing the cradle body 110 to enter and exit the enclosure as described above.

The pull-out portion 140 may include an operation opening member 142 having a protruding protrusion 142a protruding outward from the pull-out case 144, have.

The push-out unit 140 may include a push button 145 connected to the operation start member 142 and exposed to the front surface of the push-out case 144.

That is, when the operator pushes the push button 145, the operation start member 142 is slidably moved from the front face of the pull-out case 144 together with the push button 145 in the direction toward the rear end.

Accordingly, the lancet engagement hole (not shown) connected to the lancet hole 144a formed at the front end of the pull-out and carry case 144 is communicated. Thereafter, the worker can insert the wrench through the wrench 144a to operate the draw-out portion 140. [

On the other hand, a guide protrusion 144b for installing the interlock unit 160 may be provided on one side of the pull-out case 144.

The interlock unit 160 is connected to the operation start member 142 to move the closing rod 122 to prevent the closing operation of the connecting member 102 when the draw-out unit 140 is driven.

Meanwhile, the interlock unit 160 may include the elevation member 162, the tiltable member 164, and the connection shaft 166.

The elevating member 162 is installed on the draw-in / out case 144 so as to be movable up and down. That is, the elevating member 162 is installed on the guide protrusion 144b provided in the inlet / outlet case 144 so as to be able to move up and down. For this purpose, the elevating member 162 is provided with a guide hole 162a, Respectively.

Further, the elevating member 162 may be provided with an inclined surface 162b which is brought into contact with the protruding protrusion 142a formed on the operation starting member 142 and is driven to move up and down by the movement of the operation starting member 142. [

That is, when the operation starting member 142 is moved from the front side to the rear side, the protruding protrusion 142a is moved along the inclined surface 162b to move the lifting member 162 to the lower side.

At this time, the elevating member 162 is moved downward along the guide protrusion 144b.

On the other hand, one end of the pivoting member 164 is installed at the end of the lifting member 162 and the other end is connected to the connecting shaft 166. That is, as the elevating member 162 is moved up and down, the pivoting member 164 rotates the connecting shaft 166.

The connecting shaft 166 is connected to the first rotating shaft 128b of the blocking latch lever 128 to rotate the blocking latch lever 128.

The interlock unit 160 may further include a spring 168 whose one end is installed in the drawer case 144 and the other end is installed in the elevation member 162.

For example, the spring 168 may be provided at one end with the guide protrusion 144b and at the other end with the mounting protrusion 162c of the elevating member 162. [ The spring 168 is extended when the operation starting member 142 slides rearward and is compressed by the restoring force when the operation starting member 142 returns to the home position so that the lifting member 162 is returned to the home position .

As described above, it is possible to prevent the connection member 102 from being inserted during driving of the draw-out portion 140 through the interlock unit 160.

Hereinafter, operation of the circuit breaker according to an embodiment of the present invention will be described with reference to the drawings.

4 and 5 are explanatory views for explaining operation of the circuit breaker according to an embodiment of the present invention.

More specifically, Fig. 4 is an explanatory view for explaining a state in which the closing operation is possible, and Fig. 5 is an explanatory diagram for explaining a state in which closing operation is impossible by the interlock unit.

4, when the operator presses the push button 145 of the pull-out portion 140 as shown in FIG. 5, the operation start member 142 is moved to the pull-out portion case 144 together with the push button 145, In the direction from the front to the rear.

4, in accordance with the movement of the guide projection 144a formed in the operation start member 142, the elevation member 142 of the interlock unit 140 is moved in the direction of the guide projection 144a ).

When the elevating member 142 of the interlock unit 140 is thus lowered, the pivoting member 144 is driven together with the elevating member 142 so that the connecting shaft 146 is rotated clockwise Direction.

On the other hand, when the connection shaft 146 is rotated clockwise, the first rotation shaft 128b connected to the connection shaft 146 is rotated. At this time, the blocking latch lever 128 provided on the first rotating shaft 128b is rotated clockwise to rotate the closing lever 130 counterclockwise.

The closing rod 122 is rotated by the rotation of the closing lever 130 in conjunction with the closing lever 130.

The closing rod 122 is separated from the driving pressing member 124 that starts the closing operation of the connecting member 102 so that the closing operation of the connecting member 102 is performed even if the operator presses the closing button 70 It can not be.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be obvious to those of ordinary skill in the art.

100: Breaker
120:
140: Incoming / Outgoing
160: interlock unit

Claims

A connecting member driver having a charging rod for starting the charging operation of the electrode bar of the connecting member;
An input / output unit disposed adjacent to the connection member driving unit and having an operation start member slidably mounted; And
An interlock unit which is connected to the operation start member and moves the input rod when driving the input / output unit to prevent the input operation of the connection member;
.

The apparatus of claim 1, wherein the interlock unit
An elevating member installed to be able to move up and down in the case of the pull-out portion;
A tilting member whose one end is installed at an end of the elevating member; And
A connecting shaft provided at the other end of the pivoting member and rotated according to the ascending and descending of the elevating member;
.

3. The method of claim 2,
Wherein the interlock unit further comprises a spring whose one end is installed in the drawer case and the other end is installed on the elevating member.

3. The apparatus of claim 2, wherein the connection member driver
A blocking latch lever connected to the connection shaft;
A closing lever which is rotated or restricted by rotation of the blocking latch lever; And
A blocking connecting rod connecting the closing lever and the closing rod to move the closing rod when rotation is restricted by the blocking latch lever to prevent driving of the connecting member driving part;
.

5. The method of claim 4,
And the blocking latch lever is connected to the spring for the blocking latch lever to rotate when the locking is released to enable rotation of the closing lever.

5. The method of claim 4,
Wherein the closing lever is connected to the spring for the closing lever and rotated when the restriction by the blocking latch lever is released to move the closing rod to a position where the connection member can be driven.

3. The method of claim 2,
Wherein the elevating member has an inclined surface which is brought into contact with a protruding jaw formed on the operation starting member and is moved up and down by the movement of the operation starting member.

3. The method of claim 2,
Wherein a guide hole is formed in the elevating member to guide the elevating path of the elevating member by inserting the guide protrusion of the pull-out and carry case.