KR102621357B1 - Electric opening system for circuit breaker - Google Patents

Abstract

An invention for an auxiliary switch device for a distribution circuit breaker is disclosed. The auxiliary switch device of the distribution circuit breaker of the present invention includes: a casing provided in the switchboard main body, a rod guide block fixed to the casing, and a rod guide block that is supported and moves linearly along the axial direction to protrude to the outside of the casing and moves to the outside of the casing. It is characterized by comprising a shuttle rod that presses a manual shutoff button provided in the switchboard body while moving protrudingly forward, and an actuator that guides the shuttle rod to reciprocate in a straight line in the axial direction.

Description

Auxiliary switchgear of distribution circuit breaker {ELECTRIC OPENING SYSTEM FOR CIRCUIT BREAKER}

The present invention relates to an auxiliary switch device for a distribution circuit breaker. More specifically, when detecting an overcurrent or a distribution line failure, the corresponding signal is received and the plunger is advanced, and a manual cutoff button is activated through the shuttle rod advanced by the plunger. This relates to an auxiliary switch device for a distribution circuit breaker that can prevent malfunction or delayed operation of the circuit breaker by quickly operating the circuit breaker.

A circuit breaker as disclosed in Korea Registered Utility Model Publication No. 20-0382138 (registration date: 2005.04.08. Design name: distribution circuit breaker) is used as a means of automatically blocking circuits against overcurrent or overcurrent due to short circuit. .

Meanwhile, when a molded circuit breaker is installed inside a switchboard, manual operation of the molded circuit breaker requires opening the front door of the switchboard and then operating a switch on the main body, which causes the inconvenience of opening and closing the front door of the switchboard.

For this reason, a circuit breaker with a handle shaft provided in connection with the switch of the main body has been proposed.

A molded circuit breaker with a handle shaft provided in connection with a switch on the main body is installed inside the switchboard, and the tip of the handle shaft provided on the main body is coupled with the handle on the front door of the switchboard. The switch on the main body is operated by manipulating the handle on the front door of the switchboard. Because this can be achieved, manual operation of the molded circuit breaker can be easily performed even when the front door of the switchboard is closed.

However, in a molded circuit breaker in which a handle shaft is provided in connection with a switch on the main body, the tip of the handle shaft may be biased to either the up, down, left, or right sides due to tolerances between parts or incorrect manufacturing. If it is biased to one side, it becomes difficult to connect with the handle provided on the front door of the switchboard, making it impossible to manually operate the circuit breaker by manipulating the handle, and if the handle shaft and handle are not connected, it is difficult to close the front door of the switchgear itself. There is a problem that comes with it.

For this reason, the field is seeking ways to not only facilitate the combination of the handle shaft and the handle, but also to smoothly close the front door of the switchgear, but satisfactory results have not been obtained to date.

The present invention was created to improve the above problems, and the purpose of the present invention is to receive the signal when detecting an overcurrent or a distribution line failure and advance the plunger, thereby manually The aim is to provide an auxiliary switchgear for a distribution circuit breaker that can prevent false or delayed operation of the circuit breaker by quickly operating the circuit breaker and ensure the operational reliability of the manual circuit breaker.

The auxiliary switch device of the distribution circuit breaker according to the present invention includes: a casing provided in the switchboard main body; A rod guide block fixedly installed on the casing; a shuttle rod supported on the rod guide block, reciprocating linearly along the axial direction so as to protrude to the outside of the casing, moving forward to protrude to the outside of the casing, and pressing a manual shutoff button provided in the switchboard body; and an actuator that guides the shuttle rod to reciprocate linearly in the axial direction.

The actuator includes a solenoid body that receives an electrical signal from the outside; a plunger that is provided to be accessible in and out of the solenoid body and receives linear reciprocating motion through the electrical signal; A pawl mover that is integrally provided with the shuttle rod and moves forward with the shuttle rod by the pushing force of the plunger; and an elastic member that elastically supports the pole mover with respect to the casing and moves the pole mover and the shuttle rod backwards to their initial positions when the external force pushing the shuttle rod is removed.

The auxiliary switch device for a distribution circuit breaker according to the present invention includes a state detection unit that detects a state in which the shuttle rod operates the manual cutoff button by operation of the actuator.

The state detection unit includes a ratchet pawl linked to the linear reciprocating movement of the shuttle rod; a ratchet gear rotatably provided on the casing or the rod guide block, forming gear teeth on a circumferential surface, and rotating the ratchet pawl, which advances together with the shuttle rod, by a set amount in one direction by pushing the gear teeth; A support block fixed to the casing; a rotary shaft rotatably inserted into the support block, connected to the ratchet gear, and elastically rotated in one direction by a predetermined amount by the ratchet gear; a display plate that is fixed to the rotary shaft and rotates together in the circumferential direction, and displays an operating state of the manual shutoff button by displaying different portions of the portion exposed to the outside of the casing; and an initial return unit that initializes the display plate and the ratchet gear to return the portion exposed to the outside of the casing to its initial position.

The initial return unit includes a rack gear member capable of moving forward and backward along the axial direction; a pinion gear member formed on the circumferential surface of the rotary shaft and geared to the rack gear member after the rack gear member moves a certain distance in the axial direction; A guide sphere formed along a certain trajectory with different height differences on the rack gear member; and a shift block connected to the guide mechanism, which returns the ratchet gear to its initial position through forced rotation of the rotary shaft by spaced the ratchet pawl from the ratchet gear when the rack gear member moves forward.

The pinion gear member has a pivot protruding from the circumferential surface, and the support block has a stopper in contact with the pivot to set the origin when the pinion gear member returns to its initial position.

The auxiliary switch device of the distribution circuit breaker according to the present invention, when detecting overcurrent or a distribution line failure, receives the corresponding signal and advances the plunger, thereby quickly operating the manual disconnect button through the shuttle rod advanced by the plunger. Accordingly, it is possible to prevent incorrect or delayed operation of the circuit breaker and ensure the operation reliability of the manual shutoff button.

Figure 1 is a configuration diagram of a switchboard main body provided with an auxiliary switchgear for a distribution circuit breaker according to an embodiment of the present invention.
Figure 2 is a perspective view of an auxiliary switch device for a distribution circuit breaker according to an embodiment of the present invention.
Figure 3 is a rear perspective view of an auxiliary switch device for a distribution circuit breaker according to an embodiment of the present invention.
Figures 4 and 5 are perspective views showing the operating state of the actuator of the auxiliary switchgear of the distribution circuit breaker according to an embodiment of the present invention.
Figures 6 and 7 are perspective views showing the operating state of the status detection unit of the auxiliary switchgear of the distribution circuit breaker according to an embodiment of the present invention.

Hereinafter, an auxiliary switchgear for a distribution circuit breaker according to an embodiment of the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or sizes of components shown in the drawing may be exaggerated for clarity and convenience of explanation.

Additionally, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

Figure 1 is a configuration diagram of a switchboard body equipped with an auxiliary switchgear for a distribution circuit breaker according to an embodiment of the present invention.

Figure 2 is a perspective view of an auxiliary switch device for a distribution circuit breaker according to an embodiment of the present invention, and Figure 3 is a rear perspective view of an auxiliary switch device for a distribution circuit breaker according to an embodiment of the present invention.

Figures 4 and 5 are perspective views showing the operating state of the actuator of the auxiliary switching device for a distribution breaker according to an embodiment of the present invention, and Figures 6 and 7 are auxiliary switching and closing devices for a distribution breaker according to an embodiment of the present invention. This is a perspective view showing the operating status of the status detection unit of the device.

As shown in Figures 1 to 7, the auxiliary opening and closing device 100 of a distribution circuit breaker according to an embodiment of the present invention includes a casing 110, a rod guide block 120, a shuttle rod 130, and an actuator ( 200) and a status detection unit 300.

The casing 110 is fixedly installed on the switchboard body 10. In particular, the casing 110 is fixedly installed on the switchboard body 10 adjacent to the manual cutoff button 20, which manually blocks the current (circuit) when overcurrent or distribution line failure is detected. Of course, the casing 110 can be applied in various shapes and materials.

The rod guide block 120 is fixedly installed inside the casing 110. The rod guide block 120 may be the casing 110 itself, and can be applied in various shapes and materials.

The shuttle rod 130 moves back and forth along the axial direction while being supported on the rod guide block 120, protrudes to the outside of the casing 110, and serves to press the manual shutoff button 20 discontinuously. At this time, in order to prevent shaking or separation of the shuttle rod 130, which is linearly reciprocated along the axial direction, the rod guide block 120 is inserted into the shuttle rod 130 or has a concave groove on the upper side. The shuttle rod 130 is stably supported by forming a depression.

Of course, the shuttle rod 130 can be applied in various shapes and materials.

In particular, the casing 110 passes through the first opening 112 so that the shuttle rod 130 is advanced and exposed to the outside. In addition, in order to prevent the shuttle rod 130 from generating significant friction with the inner surface of the first opening 112, a cylindrical sleeve 242 is inserted into the first opening 112, and the shuttle rod 130 is reciprocated while the shaft is inserted into the sleeve 242. The sleeve 242 can be modified into various shapes.

In addition, the actuator 200 receives a signal generated when overcurrent or a distribution line failure is detected and serves to push the shuttle rod 130 to quickly press the manual cutoff button 20.

At this time, the actuator 200 includes a solenoid body 210, a plunger 220, a pawl mover 230, and an elastic member 240.

The solenoid body 210 is fixedly installed inside the casing 110 and serves to receive the corresponding electrical signal from the outside due to overcurrent or a breakdown in the distribution line.

Additionally, the plunger 220 is provided to be accessible in and out of the solenoid body 210, and moves forward along the axial direction by an electrical signal generated inside the solenoid body 210. At this time, the electrical and mechanical components inside the solenoid body 210 for moving the plunger 220 forward are omitted.

In particular, the solenoid body 210 can control the force and forward movement distance of the plunger 220 through electrical signals.

The pole mover 230 is integrally provided with the shuttle rod 130 and may be the shuttle rod 130 itself. In addition, the pole mover 230 is moved forward together with the shuttle rod 130 by the pushing force of the plunger 220. Therefore, the shuttle rod 130 can press the manual shutoff button 20.

Of course, the pole mover 230 can be transformed into various shapes.

The elastic member 240 is disposed along the axial direction of the shuttle rod 130, one side is elastically supported by the position-fixed casing 110 or sleeve 242, and the other side is a pole that moves with the shuttle rod 130. It is elastically supported by the mover (230).

Therefore, when the shuttle rod 130 moves forward toward the manual shutoff button 20, the elastic member 240 is compressed. Afterwards, when the electrical signal pushing the shuttle rod 130 in the axial direction is removed, the shuttle rod 130 is moved backward by the elastic restoring force of the elastic member 240 and returns to the initial position, and in conjunction with this, the plunger 220 is moving backwards.

For convenience, the elastic member 240 is shown as a coil spring into which the shuttle rod 130 is inserted.

Meanwhile, the status detection unit 300 serves to detect the state (normal pressing, number of times, etc.) in which the shuttle rod 130 operates the manual shutoff button 20 by the operation of the actuator 200.

For this purpose, the status detection unit 300 includes a ratchet pawl 310, a ratchet gear 320, a support block 330, a rotary shaft 340, an indication plate 350, and an initial return unit 360.

The ratchet pole 310 is hingedly connected to the shuttle rod 130 or the pole mover 230 and is linked to the linear reciprocating movement of the shuttle rod 130.

The ratchet gear 320 is rotatably provided on the casing 110 or the rod guide block 120, and forms gear teeth 322 on the circumferential surface to form a ratchet pawl 310 that advances together with the shuttle rod 130. By pushing the gear tooth 322, it is rotated in one direction by a set amount.

In particular, when the shuttle rod 130 moves forward toward the manual cutoff button 20, the ratchet pawl 310 is hinged to the pole mover 230 and is in contact with an arbitrary gear tooth 322 by its own weight. (322) is pushed in the circumferential direction.

Afterwards, when the shuttle rod 130 returns to its initial position, the ratchet pawl 310 moves along the corresponding gear tooth 322 and comes into contact with the neighboring gear tooth 322. Therefore, the ratchet pawl 310 is in a standby state capable of rotating the ratchet gear 320. At this time, a force is generated to rotate the ratchet gear 320 in a direction opposite to the direction in which it is rotated by the pushing force of the ratchet pawl 310, but after the ratchet pawl 310 returns to its initial position in a short time, another (neighbor) 1) By contacting the gear tooth 322, the ratchet gear 320 rotates in only one direction.

The support block 330 is fixedly installed inside the casing 110 and can be modified into various shapes.

The rotary shaft 340 is supported by being rotatably inserted into the support block 330, and one side is connected to the ratchet gear 320 along the axial direction. For example, one side of the rotary shaft 340 and the ratchet gear 320 are gear-coupled as a miter gear 342. Therefore, when the ratchet gear 320 rotates by a set amount by moving the ratchet pawl 310 by one cycle (1 cycle), the rotary shaft 340 is linked to the ratchet gear 320 and rotates in one direction.

At this time, the ratchet gear 320 is restrained by the ratchet pawl 310 to prevent rotation in the other direction, and restrains the rotary shaft 340 through the miter gear 342. In addition, the ratchet gear 320 does not randomly rotate continuously in one direction.

The display plate 350 is fixed to the other side of the rotary shaft 340 and rotates together in the circumferential direction. Additionally, the casing 110 forms a second opening 114 to expose a portion of the front surface of the display plate 350. In addition, the display plate 350 is divided into different colors or serial numbers are arranged along the circumferential direction on the front surface. Therefore, the user can recognize the normal and fixed rotation of the rotary shaft 340 and the ratchet gear 320 through the rotation amount and rotation state of the display plate 350 through the second opening 114, thereby manually blocking the rotation. The operation status (number of times, etc.) of the button 20 is confirmed. Of course, the display plate 350 can be applied in various shapes and materials.

In addition, the initial return unit 360 serves to initialize the display plate 350 and the ratchet gear 320 to return the portion exposed to the outside of the casing 110 through the second opening 114 to the initial position. do. That is, the initial return unit 360 counts the state in which the shuttle rod 130 presses the manual cutoff button 20 through the display plate 350 and returns it to the initial state.

The initial return unit 360 includes a rack gear member 361, a pinion gear member 362, a guide member 363, and a shift block 364.

The rack gear member 361 is provided to be able to move forward and backward along the axial direction inside the casing 110. In detail, the casing 110 is provided with a fixed rack guide block 365, and the rack gear member 361 is capable of reciprocating movement along the axial direction while being supported by the rack guide block 365. Of course, the rack guide block 365 can be modified into various shapes.

The pinion gear member 362 is formed on the circumferential surface of the rotary shaft 340 and is gear-coupled with the rack gear member 361 after the rack gear member 361 moves a set distance along the axial direction.

That is, before the rack gear 361 is moved in the axial direction by a set distance, the rack gear member 361 and the pinion gear member 362 are not geared. In other words, when the ratchet pawl 310 rotates the ratchet gear 320 in one direction by one cycle (1 cycle), the rack gear member 310 and the pinion gear member 362 are not geared.

When the rack gear 361 and the pinion gear member 362 are gear-coupled, the ratchet gear 320, the rotary shaft 340, and the rack gear member 361 are mutually restrained.

The guide sphere 363 is formed along a certain trajectory with different height differences on the rack gear member 361. That is, the guide sphere 363 is formed in the shape of a groove or hole that is inclined upward to the right or upward to the left in the rack gear member 361.

The shift block 364 is connected to the guide member 363 and serves to space the ratchet pawl 310 from the ratchet gear 320 when the rack gear member 361 moves forward. In particular, the shift block 364 has a guide pin 368 protruding from the bottom, and the guide pin 368 is inserted into the guide sphere 363. Therefore, when the rack gear member 361 moves along the axial direction, the guide pin 368 moves in the up and down direction according to the position of the guide member 363, so that the shift block 364 moves in the up and down direction.

As the shift block 364 moves upward, the ratchet pawl 310 is spaced apart from the ratchet gear 320 by the pushing force of the shift block 364.

Accordingly, the ratchet gear 320 can rotate in the other direction opposite to the direction in which the ratchet pawl 310 pushes.

At this time, the rack gear member 361 extends the reset button 366 to protrude outward from the casing 110. Therefore, each time one cycle of the ratchet pawl 310 pushing the gear tooth 322 of the ratchet gear 320 is completed, the rack gear member 361 and the reset button 366 move along the axial direction. It goes backwards. Then, when the user presses the reset button 366, the rotary shaft 340 and ratchet gear 320 rotate in the other direction.

Therefore, through the forced rotation of the rotary shaft 340, the ratchet gear 320 and the display plate 350 are moved to the initial position, and the ratchet gear 320 returns to the initial position through the rotary shaft 340. .

In addition, the reset button 366 returns to its initial state when the external pressing force is removed by the elastic return inducing member 369 elastically supported by the casing 110 or the rack guide block 365. Here, the elastic return inducing member 369 is assumed to be a coil spring.

In addition, the pinion gear member 362 protrudes a pivot 367 on the circumferential surface, and the support block 330 is in contact with the pivot 367 to set the origin when returning to the initial position of the pinion gear member 362. A stopper 332 may be provided. Of course, the pivot 367 and the stopper 332 can be modified into various shapes.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. will be. Therefore, the true technical protection scope of the present invention should be determined by the scope of the patent claims below.

10: Switchboard body 20: Manual shutoff button
100: Auxiliary switch 110: Casing
120: Rod guide block 130: Shuttle rod
200: Actuator 210: Solenoid body
220: Plunger 230: Pole Mover
240: Elastic member 300: Status detection unit
310: Ratchet pole 320: Ratchet gear
330: Support block 340: Rotary shaft
350: display plate 360: initial return unit
361: Rack gear member 362: Pinion gear member
363: Guide sphere 364: Shift block

Claims (6)

A casing provided in the switchboard body;
A rod guide block fixedly installed on the casing;
A shuttle rod is supported on the rod guide block, reciprocates linearly along the axial direction so as to protrude to the outside of the casing, and moves forward to protrude to the outside of the casing while pressing a manual shutoff button provided in the switchboard body; and
It includes an actuator that guides the shuttle rod in a linear reciprocating motion in the axial direction,
It includes a state detection unit that detects a state in which the shuttle rod operates the manual shutoff button by operation of the actuator,
The state detection unit includes a ratchet pawl linked to the linear reciprocating movement of the shuttle rod;
a ratchet gear rotatably provided on the casing or the rod guide block, forming gear teeth on a circumferential surface, and rotating the ratchet pawl, which advances together with the shuttle rod, by a set amount in one direction by pushing the gear teeth;
A support block fixed to the casing;
a rotary shaft rotatably inserted into the support block, connected to the ratchet gear, and elastically rotated in one direction by a predetermined amount by the ratchet gear;
a display plate that is fixed to the rotary shaft and rotates together in the circumferential direction, and displays an operating state of the manual shutoff button by displaying different portions of the portion exposed to the outside of the casing; and
An auxiliary switchgear for a distribution circuit breaker, comprising an initialization unit that initializes the display plate and the ratchet gear to return the portion exposed to the outside of the casing to its initial position.
The method of claim 1, wherein the actuator:
A solenoid body that receives electrical signals from the outside;
a plunger that is provided to be accessible in and out of the solenoid body and receives linear reciprocating motion through the electrical signal;
A pawl mover that is integrally provided with the shuttle rod and moves forward with the shuttle rod by the pushing force of the plunger; and
An auxiliary switchgear for a distribution circuit breaker, comprising an elastic member that elastically supports the pole mover with respect to the casing and moves the pole mover and the shuttle rod backwards to their initial positions when the external force pushing the shuttle rod is removed. .
delete delete The method of claim 1, wherein the initial return unit,
A rack gear member provided to move forward and backward along the axial direction;
a pinion gear member formed on the circumferential surface of the rotary shaft and geared to the rack gear member after the rack gear member moves a certain distance in the axial direction;
A guide sphere formed along a certain trajectory with different height differences on the rack gear member; and
A shift block is connected to the guide mechanism, and when the rack gear member moves forward, the ratchet pawl is spaced from the ratchet gear, thereby returning the ratchet gear to its initial position through forced rotation of the rotary shaft. Auxiliary switchgear of distribution circuit breaker.
According to clause 5,
The pinion gear member has a pivot protruding from the circumferential surface,
The support block is an auxiliary switchgear for a distribution circuit breaker, characterized in that it is provided with a stopper in contact with the pivot to set the origin when returning to the initial position of the pinion gear member.

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