KR20110090124A

KR20110090124A - Device for preventing of earthing switch

Info

Publication number: KR20110090124A
Application number: KR1020100009722A
Authority: KR
Inventors: 이유범
Original assignee: 현대중공업 주식회사
Priority date: 2010-02-02
Filing date: 2010-02-02
Publication date: 2011-08-10

Abstract

PURPOSE: A device for preventing of a ground switch is provided to protect a production by preventing the operation handle of a ground switch from being inserted into the driving shaft of the ground switch when loading/unloading a vacuum interrupter. CONSTITUTION: In a device for preventing of a ground switch, an operation bar(200) installed in one side of a loading/unloading device and is linked with the operation of the loading/unloading device. A switch(300) is installed in front of the operation bar and is operated by the operation bar. A bushing part(500) is inserted into the end of the driving shaft of a ground switch and has a guide groove which a switch is inserted into or separated from. The bushing part prevents the operation handle of the ground switch from being inserted into the driving shaft of the ground switch when loading/unloading a vacuum interrupter.

Description

DEVICE FOR PREVENTING OF EARTHING SWITCH}

The present invention relates to a device for preventing driving of a ground breaker during drawer entry / exit, and more particularly, during a drawer pull-in and out of the vacuum circuit breaker, the handle of the ground breaker is inserted into and out of the drive shaft of the ground switch. It relates to a drive preventing device of the grounding switch.

In general, the vacuum circuit breaker is built in the switchboard and has the ability to cut off the fault current and energize the rated current on the line, and to extinguish the arc generated during the opening and closing under normal load and the breakdown of the fault current in the vacuum vessel. This equipment is for protecting circuits and equipment.

In addition, the vacuum circuit breaker is a fixed type in which the circuit breaker and the circuit breaker of the circuit breaker are directly fastened by a fastening tool to conduct electricity, and the drawer is artificially drawn in and out of the circuit breaker in the state of being placed in the cradle. It is divided into a draw-out type that is a structure that can be fastened and separated as necessary, the current-carrying part and the current-carrying part in the switchboard.

However, the drawer type vacuum circuit breaker may cause a malfunction of the vacuum circuit breaker or an accident on the power system when attempting to connect the ground breaker at a position other than the inlet position and the outlet position.

Therefore, when a conventional vacuum circuit breaker is pulled in and out, the operation handle for the ground switchgear is inserted into the drive shaft of the ground switchgear, and when the force is applied to the handle to close the ground switchgear, the rotation of the handle becomes impossible by a certain angle. It was installed to prevent the close of the grounding switch.

However, damage to the blocking part and related parts may occur due to the excessive handle operation of the user, which may cause a safety accident.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to protect the product and parts by blocking the operation handle of the grounding switch is inserted into the drive shaft of the grounding switch during the draw-in and out of the vacuum circuit breaker In addition, the present invention provides a device for preventing the operation of a ground breaker during the drawer in and out of a vacuum circuit breaker that increases safety.

In order to achieve the above object, the driving preventing device of the ground circuit breaker of the vacuum circuit breaker draw-in and out according to the present invention is provided on one side of the draw-out device for the draw-in and out of the vacuum circuit breaker and the operation bar interlocked with the operation of the draw-out device, and It is provided at the front of the operation bar and is locked or unlocked by the operation of the operation bar, the opening and closing portion is reversed when locked and advanced when unlocking, the center is fitted to the tip of the drive shaft of the folding switch, the opening and closing portion is inserted at one side Alternatively, the guide groove is provided to be detached so that the opening and closing part is not movable when inserted into the guide groove, and the opening and closing part is movable when detached from the guide groove so that the operation handle of the grounding switch is inserted into the driving shaft of the grounding switch. It is characterized in that it comprises a; bushing to allow or block.

Here, the opening and closing portion is provided with an insertion groove into which the operation bar is inserted, one end of which is inserted into the guide groove, a spring for supporting the other end of the stopper, and a support for fixing the spring and the stopper.

And, the front end of the operation bar is inserted into one side of the insertion groove of the stopper is made of an inclination angle so as to move the stopper rearward when the insertion proceeds.

As described above, according to the driving prevention device of the ground breaker during the drawer in and out of the vacuum breaker of the present invention, the handling of the user by blocking the operation handle of the ground breaker is not inserted into the drive shaft of the ground breaker during the vacuum breaker draw-in and out Safety accidents can be prevented in advance, and the maintenance cost can be reduced by not only protecting the product but also reducing the after-sales service.

1 is a view illustrating an operation when a vacuum circuit breaker is a disconnection position or a test position in a driving prevention device of a ground circuit breaker during drawing out of a vacuum circuit breaker according to an embodiment of the present invention;
2 is a view illustrating an operation of a vacuum circuit breaker in a pull-out state in a device for preventing the operation of a ground circuit breaker during the circuit breaker pull-out according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the driving preventing device of the ground breaker during the withdrawal of the vacuum breaker according to the present invention is provided at one side of the withdrawal device 100 for withdrawing and withdrawing the vacuum circuit breaker. The operation bar 200 is operated in conjunction with the operation of the operation bar 200, provided in the front of the operation bar 200 is locked or unlocked by the operation of the operation bar 200, is reversed when locked and advanced when unlocked A center is fitted at the tip of the opening and closing part 300 and the driving shaft 400 of the folding switch, and a guide groove 520 is provided at one side of the opening and closing part 300 so that the opening and closing part 300 is the guide groove. When it is inserted into the 520, the movement is impossible, and the opening and closing part 300 is movable when separated from the guide groove 520 so that the operation handle 600 of the grounding switch is inserted into the drive shaft 400 of the grounding switch. Bushings to allow or cut off It comprises a; 500.

Here, the opening and closing part 300 is provided with an insertion groove 311 into which the operation bar 200 is inserted, one end of which is inserted into the guide groove 3122, and the other end of the stopper 310. It is provided with a spring 320 for supporting, and a support 330 for fixing the spring 320 and the stopper 310.

At this time, the insertion groove 311 of the stopper is provided so that the front end of the operation bar 200 corresponds to the rear end of the insertion groove 311.

And, the tip of the operation bar 200 is inserted into the end of the tip of the operation bar 200 into the insertion groove 311 of the stopper 310 can move the stopper 310 naturally rearward when the insertion proceeds. So that the inclined surface 210 is formed.

In addition, the stopper 310 is preferably provided with an appropriate load and an appropriate friction force in accordance with the movement, in order to minimize the time of the movement to the minimum angle of operation of the operating bar 200 and the bite of the stopper 310. It is preferable to make an amount etc. suitably.

On the other hand, the housing 700 of the vacuum circuit breaker is provided with an operation handle insertion groove 710 into which the operation handle 600 of the grounding switch is inserted, and the drive shaft of the grounding switch at a position corresponding to the operation handle insertion groove 710. 400 is provided, the bushing portion 500 is fitted to the front end of the drive shaft 400.

The bushing part 500 is supported by the compression spring 410 connected to the drive shaft 400, and when the operation handle 600 of the ground switch is inserted into the operation handle insertion groove 710, the bushing part 500. ) Is moved to the rear, and the operation handle 600 of the ground switch is connected to the drive shaft 400 of the ground switch.

The guide groove 520 is provided at one side of the bushing part 500, and the stopper 310 is inserted into the guide groove 520. In this case, insertion of the stopper 310 fixes the bushing part 500 so that the bushing part 500 is not pushed backward.

Referring to the operation of the driving prevention device of the grounding switch during the drawer draw-out and out as described above are as follows.

First, as shown in FIG. 1, when the vacuum circuit breaker reaches a disconnection position or a test position, the operation bar 200 linked by the take-out device 100 moves to the stopper 310. The stopper 310 is forcibly removed from the guide groove 520 of the bushing part 500 by being inserted backward into the groove of the bushing part 500.

As a result, the bushing part 500 is freely moved, and when the operation handle 600 of the ground switch is inserted into the operation handle insertion groove 710 to drive the ground switch, the bushing part 500 is rearward. It is possible to connect the operation handle 600 of the grounding switch and the drive shaft 400 of the grounding switch by pushing.

In addition, the stopper 310 is fixed to the operation bar 200 is inserted into the insertion groove 311, the spring 320 is under a compressive force and the vacuum breaker attempts to draw in and out the operation bar 200 As soon as the) is moved, the stopper 310 is preparing to operate.

When the vacuum breaker starts drawing in and out in the state of FIG. 1, as shown in FIG. 2, the insertion groove of the stopper 310 that is fixed while the operation bar 200 is moved by the interlocking of the drawing device 100. The stopper 310 is released from 311 and the fixing of the stopper 310 is released, and the spring 320 under the compressive force pushes the stopper 310 so that the stopper 310 of the bushing part 500 is removed. Insert into the guide groove (520).

As a result, the bushing part 500 is caught by the stopper 310 so that it is impossible to move backward, and the operation handle 600 of the ground breaker is inserted into the operation handle insertion groove to drive the ground breaker. When inserted into the 710, the operation handle 600 of the ground switch is not inserted into the drive shaft 400 of the ground switch, so that the ground switch cannot be driven.

This state is maintained by the vacuum breaker during the service state, i.e., the draw-out state.

As described above, the present invention can prevent the safety accident that may occur during the user's handling by blocking the operation handle of the grounding switch from being inserted into the drive shaft of the grounding switch during the drawer in and out of the vacuum circuit breaker. Of course, the maintenance cost can be reduced by reducing after-sales service.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Of course.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

100: take-out device 200: operation bar
210: slope 300: opening and closing portion
310: stopper 311: insertion groove
320: spring 330: support
400: drive shaft 410: compression spring
500: bushing 520: guide groove
600: operation handle 700: housing
710: operation handle insertion groove

Claims

An operation bar provided on one side of a drawer device for drawing in and out of the vacuum circuit breaker and interlocked with an operation of the drawer device;
An opening and closing portion provided at the front of the operation bar and locked or unlocked by the operation of the operation bar, reversing when locked and moving forward when unlocked;
A center is fitted at the front end of the drive shaft of the ground switch, and a guide groove into which the opening and closing part is inserted or removed is provided at one side thereof, so that the opening and closing part is not movable when the opening is inserted into the guide groove. And a bushing part configured to allow or block the operation handle of the ground switch to be inserted into the drive shaft of the ground switch. 2.

The method of claim 1,
The opening and closing part is provided with an insertion groove into which the operation bar is inserted, and a stopper having one end inserted into the guide groove, a spring supporting the other end of the stopper, and a vacuum supporting member for fixing the spring and the stopper. Device for preventing the operation of the grounding switch during breaker draw-out.

The method of claim 2,
The front end of the operation bar is a drive prevention device of the grounding switch during the drawer in and out, characterized in that the inclined surface so as to move the stopper to the rear when inserted into the insertion groove of the stopper.