KR20160122314A

KR20160122314A - Air circuit breaker

Info

Publication number: KR20160122314A
Application number: KR1020150051744A
Authority: KR
Inventors: 박종덕
Original assignee: 현대중공업 주식회사
Priority date: 2015-04-13
Filing date: 2015-04-13
Publication date: 2016-10-24
Also published as: KR101701155B1

Abstract

Disclosed is an air circuit breaker which comprises: a connection member driving unit connected to a connection member and having a rotation shaft unit rotating in connection with the inputting or blocking of the connection member to or from an electrode bar; an input and output unit arranged adjacently to the connection member driving unit and having a motion initiation member which can move by sliding; and a locking unit driven in connection with the rotation shaft unit and configured to come into contact with the motion initiation member when the connection member is inputted.

Description

{AIR CIRCUIT BREAKER}

The present invention relates to an air circuit breaker.

Generally, the air circuit 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 is generated in a transmission line having a relatively low voltage, and extinguishes an arc generated when the line is broken by using compressed air.

The air circuit 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 air circuit breaker is generally performed automatically or according to the user's selection according to the state of the energizing circuit.

On the other hand, the air circuit breaker includes a cradle that is installed to be able to be drawn out to the enclosure, and a cradle pull-in and-forth movement device for pulling-out the cradle into the enclosure.

However, when the cradle is pulled in and out in the closing state of the breaker, an accident current such as an overcurrent is generated and the air circuit breaker is damaged.

Therefore, it is necessary to develop a structure capable of preventing the cradle from being drawn in and out in a state in which the cradle is inserted into the circuit breaker.

Korean Patent Registration No. 0771922

There is provided an air circuit breaker capable of preventing the cradle from coming in and out in a state in which the breaker is inserted.

The air circuit breaker according to an embodiment of the present invention includes a connection member driver connected to a connection member and having a rotation axis portion rotated in conjunction with insertion and blocking of an electrode bar of the connection member, And a locking unit which is driven in association with the rotary shaft portion and contacts the operation start member when the connection member is inserted.

The locking unit includes a rotating member installed on the rotating shaft unit and rotating in conjunction with the rotating shaft unit; a pressing member connected to an end of the rotating member to move up and down in conjunction with rotation of the rotating member; A coil spring supported by the cradle of the air circuit breaker and supported at the other end thereof, and a stopper bar arranged to penetrate the coil spring and having one end fixed to the pressing member.

The pressing member may include a first pressing member provided at an end of the rotating member via a pin and a second pressing member having an upper portion formed with an assembling groove in which the first pressing member is assembled.

The first pressing member is formed in a shape of a wheel having a groove and the first pressing member and the second pressing member can be assembled so that the fitting groove of the second pressing member and the groove of the first pressing member correspond to each other.

The pull-out portion may include an operation opening member having a pull-in / out case having an inner space and a drive limiting latch bar protruding outward from the pull-out / support case.

A stepped groove may be formed in the drive limiting latching bar.

There is an effect that it is possible to prevent the operation of the draw-out portion in the state in which the breaker is inserted.

1 is a schematic perspective view showing a part of an air circuit breaker according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a rotating shaft portion, a draw-in portion, and a locking unit of the air circuit breaker according to an embodiment of the present invention.
3 is an enlarged view showing part A of Fig.
4 and 5 are explanatory views for explaining the operation of the air 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.

2 is a perspective view illustrating a rotary shaft portion, a pull-in / out portion, and a locking unit of the air circuit breaker according to the embodiment of the present invention, and FIG. 3 is a perspective view of the air circuit breaker according to the embodiment of the present invention. Is an enlarged view showing part A of Fig.

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

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

The connection member driving part 120 includes a rotation axis part 122 which is connected to a connection member (not shown) and rotates in conjunction with insertion and cutoff of the connection member into an electrode bar (not shown).

That is, the connection member driving unit 120 is composed of components having a power transmission structure, and transmits the 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.

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.

On the other hand, the pull-out portion 140 includes an operation opening member 142 having a pull-in / out case 144 having an internal space and a drive restriction latch bar 142a formed to protrude out of the pull- .

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. Then, the worker can insert the wrench through the wrench 144a to operate the pull-out portion 140.

On the other hand, a guide hole 144b for providing a sliding movement path of the drive limiting latching bar 142a is formed on the side surface of the pull-

The locking unit 160 is driven in conjunction with the rotary shaft portion 122 to limit the sliding movement of the operation start member 142 when the connection member is inserted.

On the other hand, the locking unit 160 includes a rotary member 162, a pressing member 164, a coil spring 166, and a stopper bar 168.

The rotary member 162 is installed on the rotary shaft portion 122 and rotates in conjunction with the rotary shaft portion 122. That is, when the rotation shaft portion 122 is rotated so that the rotation member 162 is linked to the connection member (not shown) so that the connection member is brought into contact with the electrode bar (not shown), the rotation member 162 rotates 122 are interlocked and rotated. For this purpose, the rotary member 162 is fixed to the rotary shaft portion 122.

The pressing member 164 is connected to the end of the rotating member 162 and is moved up and down in conjunction with the rotation of the rotating member 162. On the other hand, the pressing member 164 may be composed of the first pressing member 164a and the second pressing member 164b.

The first pressing member 164a is installed at the end of the rotating member 162 via a pin 165. [ Further, the first pressing member 164a is formed in a shape of a wheel having a groove 164c.

The second pressing member 164b is formed with an assembly groove 164d in which the first pressing member 164a is assembled at the upper end. That is, the first pressing member 164a and the second pressing member 164b are assembled so that the fitting groove 164d of the second pressing member 164b corresponds to the groove 164c of the first pressing member 164a.

Also, the second pressing member 164b may have a substantially "C" shape. That is, the second pressing member 164b has a supporting plate 164e for supporting one side of the coil spring 166. [

As described above, since the first pressing member 164a having a wheel shape is assembled in the fitting groove 164d having the circular shape of the second pressing member 164b, by the rotation of the first pressing member 164a, The pressing member 164b can be moved up and down.

One end of the coil spring 166 is supported by the pressing member 164 and the other end is supported by the supporting portion 112 provided to the cradle body 110. The support portion 112 of the cradle body 110 is inserted into the insertion groove 112a into which the other end of the coil spring 166 is inserted. For this, the insertion groove 112a may have a shape corresponding to the shape of the coil spring 166.

Further, the coil spring 166 is compressed when the connecting member is moved to contact the electrode bar, and provides a restoring force for restoring the pressing member 164 to the original position by the restoring force when the connecting member is spaced from the electrode bar.

The stopper bar 168 is disposed so as to pass through the coil spring 166, and one end of the stopper bar 168 is fixed to the pressing member 164. For example, the stopper bar 168 may have a bar shape having a square cross section, and one end thereof may be fixed to the support plate 164e of the second pressing member 164b.

Since the stopper bar 168 is fixed to the support plate 164e as described above, when the support plate 164e is lowered and the coil spring 166 is compressed, the stopper bar 168 is fixed to the support portion 112 of the cradle body 110 And is projected downwardly.

The lower end portion of the stopper bar 168 is inserted into the stepped groove 142b formed in the drive limiting latching bar 142a to prevent the operation starting member 142 from sliding.

Accordingly, even if the operator presses the push button 145, the operation start member 142 can not be slid in the direction toward the rear end from the front surface of the drawer case 144 together with the push button 145. [

Therefore, a 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 disposed to overlap. As a result, the operator can not insert the wrench through the wrench 144a and can not operate the drag-out unit 140.

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

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

First, referring to FIG. 4, the locking unit 160 does not restrict the driving of the pull-out unit 140. In other words, when the connecting member is in the blocking state for separating from the electrode bar, the locking unit 160 does not interfere with the sliding movement of the operation start member 142 of the pull-out portion 140 and the operator slides the operation start member 142 So that the cradle 110 can be freely drawn in and released.

More specifically, the stopper bar 168 of the locking unit 160 is positioned apart from the movement path of the operation starting member 142.

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

5, the locking unit 160 interrupts the sliding movement of the operation start member 142 of the pull-out portion 140, so that the operator can start the operation So that the member 142 can not be slidably moved. Accordingly, the operator can not bring the cradle 110 in and out.

In more detail, when the connecting member is in the closing state for contacting the electrode bar, the rotating shaft portion 122 is rotated. As a result, the rotary member 162 fixed to the rotary shaft portion 122 is rotated counterclockwise together with the rotary shaft portion 122.

The stopper bar 168 attached to the pressing member 164 is lowered by the rotating member 162 to prevent the sliding movement of the operation start member 168 of the draw- do. That is, the lower end of the stopper bar 168 is lowered and inserted into the stepped groove 142b formed in the drive limiting latching bar 142a of the operation start member 168. [

At this time, the coil spring 166 remains compressed.

Thereafter, when the connecting member is in a blocking state in which the connecting member is spaced from the electrode bar, the pressing member 164 can be restored to its original position by the restoring force of the coil spring 166.

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: Air Circuit Breaker
120:
140: Incoming / Outgoing
160: Locking unit

Claims

A connection member driving unit connected to the connection member and having a rotation axis portion rotated in conjunction with closing and closing of the electrode bar of the connection member;
An input / output unit disposed adjacent to the connection member driving unit and having an operation start member slidably mounted; And
A locking unit which is driven in conjunction with the rotary shaft to limit the sliding movement of the operation start member when the connection member is inserted;
Lt; / RTI >

2. The apparatus of claim 1, wherein the locking unit
A rotary member installed on the rotary shaft and rotated in conjunction with the rotary shaft;
A pressing member connected to an end of the rotating member and moved up and down in conjunction with rotation of the rotating member;
A coil spring whose one end is supported by the pressing member and whose other end is supported by a support portion provided on the cradle body; And
A stopper bar disposed to penetrate the coil spring and having one end fixed to the pressing member;
.

3. The method of claim 2,
Wherein the pressing member comprises a first pressing member provided at an end of the rotary member via a pin and a second pressing member having an upper portion formed with an assembly groove in which the first pressing member is assembled.

The method of claim 3,
Wherein the first pressing member is formed in a shape of a wheel having a groove and the first pressing member and the second pressing member are assembled so that the fitting groove of the second pressing member and the groove of the first pressing member correspond to each other.

3. The method of claim 2,
Wherein the pull-out portion includes a pull-in / out case having an inner space, and the operation start member having a drive limiting latch bar protruding outward from the pull-out and carry case.

6. The method of claim 5,
And a stepped groove is formed in the drive limiting latching bar.