KR100323738B1 - sajety device of crane-type circuit Breaker - Google Patents

Abstract

The present invention relates to a safety device for an air circuit breaker which prevents the door panel panel from being opened when the air circuit breaker installed in the switchboard is inserted and the air circuit breaker keeps tripping when the switch panel panel is opened. .

The present invention provides a slider movably installed at one side of the circuit breaker, a stopper formed integrally with the slider and protruding through a long hole formed in the plate, a wire rope having one end fixed to the slider, and an end of the wire rope. It is fixed on the door panel part of the switchboard and moves along the opening and closing of the door panel to move the wire rope and the slider together, and is installed between the plate and the breaker trip lever and rotates in contact with the stopper when the slide is moved. It is composed of a trip link that trips the trip lever of the breaker. When the door panel of the switchgear is opened, the slider and the stopper are raised to rotate the trip lever to trip the breaker, as well as the breaker's safety device.

Description

Safety device for crane breaker {sajety device of crane-type circuit breaker}

The present invention relates to a safety device of the air circuit breaker for preventing an electric shock accident from the air circuit breaker, and more particularly, when the air circuit breaker installed in the switchgear is inserted, so as not to open the switchboard door panel. When the switchboard panel is open, the air circuit breaker keeps tripping so that re-entry is impossible.

Generally, the air circuit breaker is installed in the switchboard, and when the door breaker is opened, an interlock device is provided to prevent the door panel from being opened while the air circuit breaker is inserted because there is a risk of electric shock. It is installed.

Figure 1 is a side view showing an example of a conventional device, the conventional device is a plate (1) fixed to one side of the air circuit breaker (13), and a hinge pin (3) rotatably installed on the plate and one end pin (4) ) Is connected to the main shaft of the breaker (not shown), a spring (5) which always exerts a one-way rotational force on the link, and one end is fixed to the link by a clamp nut (6). A wire rope 7 which is moved in accordance with the rotation of the link, and a locking pin 8 fixed to the opposite end of the wire rope and interlocked with the wire rope in accordance with the movement of the wire rope, and fixed to the switchboard door panel 12. It consists of a bracket (9) having a locking hole 10 is formed so that the locking pin can be inserted, and a tube (11) for supporting the wire rope and guides the movement.

Therefore, when the air circuit breaker is inserted, the main shaft of the breaker rotates and at the same time, the link 2 is installed on the plate 1 so that the pin 2 at one end thereof is connected to the lever of the main shaft. Rotational movement from the solid line position to the one-dot chain line position, wherein the wire rope 7 is connected to the link 2 by the clamp nut 6 in accordance with the rotational movement of the link 2 It moves upward by a certain distance (about 10mm).

As the wire rope 7 moves as the link 2 rotates as described above, the locking pin 8 installed at the end of the wire rope 7 is inserted into the locking hole 10 of the bracket 9 to lock the lock. As it plays a role, the door panel 12 of the switchboard cannot be opened.

On the contrary, when the breaker trips, the link 2 connected to the lever of the main shaft returns to its original position (solid line position), and the locking pin 8 comes out of the locking hole 10 so that the door panel 12 can be opened. The spring 5 facilitates the home position return operation of the link 2.

However, the conventional apparatus as described above has a function of preventing the door panel 12 of the switchboard from being opened while the air circuit breaker is inserted, but as a safety device when the breaker is opened while the door panel 12 is opened. It does not play a role.

That is, although the breaker should not be inserted in the state in which the door panel 12 is open, it is safe. However, since the breaker is energized even if the breaker is opened in the conventional state, there is a risk of electric shock.

An object of the present invention is to provide a safety device of the air circuit breaker of the structure that the air circuit breaker is always kept in the trip state while the door of the switchboard is open.

According to an embodiment of the present invention for achieving the above object, a plate installed on one side of the breaker, a slider movably installed on the plate, a stopper integrally formed on the slider and protruding through a long hole formed in the plate, and A wire rope having one end fixed to the slider, an actuating pin fixed to the end of the wire rope and positioned at a door panel portion of the switchboard to move the wire rope and the slider together while moving in accordance with the opening and closing of the door panel; The safety device of the air circuit breaker provided between the breaker trip levers and the trip link which rotates while contacting the stopper when the slider moves, trips the trip lever of the breaker.

1 is a side view showing a conventional device

Figure 2 is a side view showing the device of the present invention

3 is a partially enlarged rear view of the plate shown in FIG.

Explanation of symbols for main parts of drawings

21: Plate 31: Slider

32: Stopper 33: Longines

34: spring 35: wire rope

36: operation pin 38: compression spring

39: Triplink

Figure 2 is a side view of the device of the present invention, Figure 3 is a partially enlarged view of Figure 2, Figure 4 is a rear view of the plate.

The plate 21 is fixed to one side of the air circuit breaker 13 and the link 21 is rotatably installed on the plate 21 by a hinge pin 23, and one end pin of the link 22 ( 24 is connected to the lever of the breaker main shaft and the link 22 is subjected to a clockwise rotational force with the hinge pin 23 as the axis by the spring 25.

One end of the wire rope 27 is fixed to the link 22 by a clamping nut 26, and a locking pin 28 is fixed to the opposite end of the wire rope 27.

Therefore, as the link 22 rotates, the wire rope 27 moves by a predetermined distance, and when the wire rope 27 is pushed out, the locking pin 28 is caught by the bracket 29 fixed to the switchboard door panel 12. Inserted into the ball 30 serves as a lock so that the door panel 12 can not be opened.

The slider 31 is installed above the link 22 so as to be movable in the up and down directions on the drawing, and the stopper 32 fixed to the slider 31 has a long hole 33 formed in the plate 21. It is inserted through and protrudes rearward, a spring 34 is provided between the stopper 32 and the bottom surface of the plate 21.

One end of the wire rope 35 is fixed to the slider 31, and an operation pin 36 is fixed to the opposite end of the wire rope 35, and the operation pin 36 is moved by a bracket 37. Possibly supported.

In addition, a compression spring 38 is installed between the bracket 37 and the operating pin 36, the compression spring 38 is a spring (between the stopper 32 and the plate 21 of the slider 31) The elastic force is designed larger than 34).

Therefore, when the operation pin 36 is pressed by an external force, the compression spring 38 is compressed while the wire rope 35 is reversed and the slider 31 is lowered so that the stopper 32 is lowered at the lower end of the long hole 33. When the position of the driving pin 36 is removed, the driving pin 36 and the wire rope 35 move forward and the slider 31 and the stopper 32 move upward.

The actuating pin 36 is located at the door panel 12 portion of the switchboard and is pushed backward when the door panel 12 is closed, and moves forward when the door panel 12 is opened.

The rear surface of the plate 21 is provided with a trip link 39 for rotating in accordance with the lifting movement of the stopper 32, as shown in Figure 3, the lever formed integrally with the trip link 39 (not shown) ) Is located at the trip lever (not shown) of the breaker.

In addition, the trip link 39 is installed at a position capable of tripping the trip lever of the breaker at a position where the stopper 32 is raised (a position at which the operation pin is advanced).

In the present invention as described above, when the air circuit breaker is put in the state in which the door panel 12 of the switchboard is closed, the link 22 rotates counterclockwise around the hinge pin 23 like the conventional apparatus. At the same time, since the locking pin 28 installed at the end of the wire rope 27 is inserted into the locking hole 30 of the bracket 29 to serve as a lock, the door panel 12 cannot be opened.

At this time, the actuating pin 36 is pushed back by the door panel 12 and the compression spring 38 is compressed, the wire rope 35 is retracted with the actuating pin 36 and the slider 31 is It remains lowered.

When the door panel 12 is opened in the above state, since the elastic force of the compression spring 38 is greater than the elastic force of the spring 34, the operation pin pressed by the door panel 12 by the force of the compression spring 38 ( 36 and the wire rope 35 are advanced, and at the same time, the slider 31 and the stopper 32 fixed to the wire rope 35 are raised by a predetermined distance, and the stopper 32 is attached to the plate 21. It moves along the formed long hole 33.

That is, when the door panel 12 is opened, as shown in FIG. 3, the stopper 32 moves from the 'A' position to the 'B' position, and the trip link 39 is moved by a dotted line by the stopper 32. In the position rotates to the same position as the solid line, when the trip link 39 is rotated, the lever is formed integrally to the trip link 39 to raise the trip lever of the breaker to trip the breaker.

In addition, when the breaker is tripped as described above, the lever integrally formed in the trip link 39 serves to fix the trip lever in the breaker body in a raised state, and thus the button is not pressed even when the breaker input button is pressed. And the breaker remains tripped.

The present invention, in addition to the conventional function that can not open the door panel of the switchboard in the state that the breaker is in the state of addition, in addition to the function that the breaker can not enter the breaker while the door panel is always open while the door panel is open It is possible to prevent the risk of a safety accident caused by the input of the breaker while the door panel is open.

Claims (3)

A plate 21 provided on one side of the breaker, a slider 31 movably mounted on the plate, a stopper 32 formed integrally with the slider and protruding through a long hole 33 formed in the plate, and the slider A wire rope 35 having one end fixed to 31 and an actuating pin fixed to an end of the wire rope and positioned at a door panel portion of a switchboard to move the wire rope and the slider together while moving along the opening and closing of the door panel. And a trip link (39) installed between the plate and the breaker trip lever and rotating while connecting with the stopper when the slider is moved to trip the trip lever of the breaker. According to claim 1, Compression spring 38 for pushing the operation pin in the forward direction on one side of the actuating pin 36 is installed and the spring 34 is installed between the stopper 32 and the plate 21 Safety device of the air circuit breaker. 3. The safety device of an air circuit breaker according to claim 2, wherein the compression spring (38) has made the elastic force greater than the elastic force of the spring (34).