JP2527668Y2 - Operating device for circuit breaker closing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Industrial Field of the Invention The present invention relates to a circuit breaker closing operation device for closing a circuit breaker by releasing the accumulated closing spring.

B. Outline of the Invention The present invention relates to a breaker closing operating device that stores the closing spring in the first half rotation of the closing cam, releases the closing spring in the remaining half rotation, and closes the breaker. By providing a damper that exerts a restraining force on the rotation of the closing cam when the rotation of the closing cam exceeds the position where the closing is completed, the occurrence of the swing of the closing cam due to the inertia force after the completion of the closing operation is prevented, and the operating device No vibration is caused in

C. Prior Art FIG. 3 shows a configuration diagram of an operation device for closing a vacuum circuit breaker used in a gas insulated switchgear.

The operation device is configured as follows. The rotation of the motor 1 as a driving means is transmitted to the gear 3 via the speed reducer 2 to rotate the gear 4. The gear 4 is rotatably supported by a rotating shaft 6 and fixed to an arm 5, and the arm 5 is attached to the rotating shaft 6 via a one-way clutch. A loading cam 7 is attached to the rotating shaft 6, and a pressing plate 9 attached to the loading spring 8 and a position of the loading cam 7 away from the rotating shaft 6 are connected via a rod 10. On the other hand, the central portion of the arm 12 is fixed to the operation shaft 11 for turning on and off a vacuum circuit breaker (not shown) by rotating, and one end of the arm 12 is located below the closing cam 7.

The rotation of the motor 1 causes the input cam 7 to rotate in the direction of the arrow, and when the position of the pin 13 which is the connecting portion between the rod 10 and the input cam 7 exceeds the top dead center, the hook 14 comes into contact with the projection 17, As shown in FIG. 4 (a), the energy storage is completed. At this time, the closing spring 8 is in a compressed state. When the hook 14 is removed from the projection 17, only the closing cam 7 rotates clockwise by the action of the one-way clutch by the urging force of the closing spring 8, and one end of the arm 12 is moved down at a high speed as shown in FIG. Press
The operation shaft 11 rotates left and the vacuum circuit breaker is turned on. At the time of closing, the shut-off spring (second
(See the figure), the taper portion 15a of the lock lever 15 is engaged with the other end of the arm 12, and the hook 16 is engaged with the lock lever 15 that is about to rotate clockwise. The breaking operation of the circuit breaker is prevented.

When the hook 16 is removed from the lock lever 15, the lock lever 15
Is rotated rightward, the arm 12 is rotated in the direction shown by the broken line in FIG. 3 by the release of the shut-off spring, and the vacuum circuit breaker is shut off.

After the closing of the vacuum circuit breaker is completed, the closing cam 7 is rotated by the inertial force, rotates to the position indicated by the two-dot chain line in FIG. 4C, and then tries to reversely rotate by the biasing force of the closing spring 8. This reverse rotation is prevented by the action of the one-way clutch.

D. Problems to be Solved by the Invention However, since the rotational movement of the closing cam that tries to rotate in the reverse direction is prevented by the one-way clutch, a large vibration is generated in the operating device.

For this reason, the one-way clutch needs to be a large clutch that does not reversely rotate even if the torque is greater than the reverse rotation torque of the closing cam (the maximum torque of the closing spring). Therefore, the cost increases.

Therefore, an object of the present invention is to provide an operating device for closing a circuit breaker that solves the above problem.

E. Means for Solving the Problems The configuration of the present invention to achieve such an object is to fix a closing cam to a rotating shaft continuously connected to a driving means, and a holding plate for accumulating a closing spring, A breaker with an arm whose one end is pushed out by the closing cam is attached to an operation shaft that connects and disconnects the breaker by turning the connecting cam at a position distant from the rotating shaft via a rod. In the operating device, a damper is provided separately from the closing spring at a position where the holding plate abuts at the end of closing, and the movement of the holding plate in the direction in which the closing spring is released at the end of closing of the circuit breaker, It is characterized in that it is controlled within a range from the end of closing of the circuit breaker to the movement of the holding plate in the direction in which the closing spring is charged.

F. Action After the breaker is closed, the closing spring keeps releasing.
Thereafter, the closing spring is slightly charged by the inertial force of the closing cam. The movement of the holding plate attached to the closing spring is suppressed by the damper during the period from the completion of the closing to the change of the moving direction of the holding plate.

Therefore, the input cam does not swing.

G. Embodiment Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. In this embodiment, since a part of the conventional operation device for closing a circuit breaker is improved, the same parts as those in the related art are denoted by the same reference numerals, and the description thereof will be omitted, and only different parts will be described.

(A) Configuration of the embodiment The configuration of the operating device for closing the circuit breaker according to the present invention is the first configuration.
Description will be made based on the drawings.

As shown in the figure, a damper 21 is provided on the side of the holding plate 9 opposite to the mounting surface of the rod 10. The damper 21 is configured as follows. A cylinder chamber 25 and a compression chamber 26 are formed in the damper body 24, and a pair of flow paths 27 and 28 are formed.
A piston 22 is provided in the cylinder chamber 25 via a return spring 29, and a receiving plate 23 is attached to the piston 22 via an extension shaft 20. With the receiving plate 23 facing the holding plate 9, the damper 21
Is fixed. The interior of the cylinder chamber 25 is filled with oil,
About half of the oil is filled in the compression chamber 26, and air remains in the remaining part.

(B) Operation of the embodiment Next, the operation of the operating device for closing the circuit breaker will be described with reference to FIGS.
Description will be made based on the drawings.

As shown in FIG. 2, the input cam 7 rotates clockwise,
In the state prior to the completion of loading indicated by the two-dot chain line in the figure,
As shown in FIG. 1, the holding plate 9 is not in contact with the receiving plate 23.

When the loading is completed, the holding plate 9 pushes the receiving plate 23, and the piston 22 moves to the left in the cylinder chamber 25. piston
At the beginning of the movement of the cylinder 22, the oil in the cylinder chamber 25
Flows into the compression chamber 26 through both of them to compress the air inside. When the piston 22 is located between the flow paths 27 and 28, the oil in the cylinder chamber 25 flows to the compression chamber 26 via the flow path 27 and returns to the cylinder chamber 25 via the flow path 28. Because of this, the piston
The movement of the brake 22 is braked, and the rotation of the closing cam 7 is suppressed. When the release of the closing spring 8 is completed, the piston 22 moves to the leftmost end of the cylinder chamber 25. Therefore, the insertion cam 7 does not continue to rotate at a high speed after the completion of the insertion.

Thereafter, when the motor 1 is rotated to accumulate the closing spring 8, the presser plate 9 separates from the receiving plate 23, and then returns to the return spring 29.
The piston 22 returns to the right end.

Reference numeral 30 in the drawing denotes a blocking spring, and a holding plate 31 for holding the blocking spring 30 is connected to the other end of the arm 12 via a rod 32.

H. Effects of the Invention As can be seen from the above description, the operating device for closing a circuit breaker according to the present invention has the following effects.

The movement of the presser plate in the direction in which the closing spring is released at the end of closing of the breaker is within the range from the end of closing of the breaker to the movement of the presser plate in the direction in which the closing spring is charged. Is provided, the swing of the input cam and the vibration of the operating device due to the swing, which have conventionally occurred after the end of insertion, are reduced.

For this reason, the expensive one-way clutch conventionally used becomes unnecessary, and a low-cost operating device can be provided.

[Brief description of the drawings]

1 and 2 relate to an embodiment of an operating device for closing a circuit breaker according to the present invention, FIG. 1 is a configuration diagram showing a main part of the operating device, FIG. 2 is an operation explanatory diagram, and FIGS. FIG. 4 relates to a conventional operating device for closing a circuit breaker, FIG. 3 is a configuration diagram of the operating device, and FIGS. 4 (a), (b) and (c) are explanatory views of the operation. 1 ... motor, 6 ... rotating shaft, 7 ... closing cam, 8 ...
Closing spring, 9 ... holding plate, 10 ... rod, 11 ... operating shaft, 12 ... arm, 21 ... damper.

Claims (1)

(57) [Scope of request for utility model registration] An input cam is fixed to a rotary shaft continuously connected to a driving means, and a pressing plate for storing an input spring is connected to a position of the input cam remote from the rotary shaft via a rod. In the operating device for circuit breaker closing, which has an arm whose one end is pushed out by the closing cam on the operating shaft that turns on and off the circuit breaker by rotating, the breaker is closed at the position where the presser plate abuts at the end of closing. A damper is provided separately from the spring, and the movement of the holding plate in the direction in which the closing spring is released when the closing of the circuit breaker is completed is controlled in the direction in which the closing spring is charged from the completion of closing of the circuit breaker. An operating device for closing a circuit breaker, characterized in that the operating device is controlled only within a range before the movement of the board.