JP2549120B2 - Electric spring operated gas circuit breaker - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric spring operated gas circuit breaker, and more particularly to an electric spring operated gas circuit breaker using a closing spring and a breaking spring for special closing and opening operations.

[Conventional technology]

As a conventional electric spring operated gas circuit breaker of this type, for example, “Mitsubishi Electric Technical Report” Vol. 59. No. 3, 1985, pages 37 to 41
This is described in "Airless Technology for 72-120 kV Buffer Type Gas Circuit Breaker" on page 7-1, which is shown in Figs.

FIG. 4 shows a front view of an electric spring operated gas circuit breaker of a three-phase collective type, in which three blocks of blocking tanks 2 each having a pair of bushings 1 are juxtaposed and supported by a gantry 5. are doing. A common operating device box 4 is installed, and the opening / closing operation force in the operating device box 4 is transmitted to each interrupting part via a link case 3 connecting the interrupting part tanks 2 to each other.

FIG. 6 shows a schematic configuration of the operation system. In the three-phase shutoff unit tank 2, shutoff units having the same structure are configured, and the movable side thereof is the output shaft 20 arranged in the link case 3. Are linked to. The output shaft 20 is introduced airtightly into the operating device box 4 and is connected to one end of the lever 19. One end of the breaking spring 9 is connected to the other end of the lever 19,
When a breaking command is given by a control mechanism (not shown), the breaking spring 9 rotates the lever 19 in the clockwise direction to open the breaking portion via the output shaft 20. On the other hand, the closing operation of the cutoff portion is performed by rotating the lever 19 counterclockwise by the closing spring 10 through a control mechanism (not shown). FIG. 5 shows these control mechanisms. When a command is given to the trip coil 15, the holding state of the breaking spring 9 is released, and the lever 19 is rotated clockwise to cut off the breaking portion. First, when a closing command is given to the closing coil 21, the holding state of the closing spring 10 is released, the lever 19 is rotated counterclockwise to close the breaking portion, and the breaking spring 9 is stored and held.

[Problems to be solved by the invention]

The conventional electric spring operated gas circuit breaker is configured as described above, and in particular, both springs 9 and 10 are arranged so as to operate on an axis orthogonal to the operation axis of the output shaft 20, and the fixed side end thereof is shown in the figure. It is supported by the back plate 4a of the controller box 4 via the seat.
The back plate 4a is fixed to the facing portion of the circuit breaker tank 2 and the seat of the lead-out portion of the output shaft 20 as shown in FIG. 6, but both springs 9 and 10 receive a rotational moment. Therefore, it has been necessary to manufacture the operating device box 4 as a strong structure so as to withstand the above-mentioned rotational moment.

An object of the present invention is to provide an electric spring operated gas circuit breaker having an operating device box having a simple structure.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention connects one end side to the movable part of the blocking part in the blocking part tank and penetrates the other end side into the operating device box by penetrating a back plate that partitions the inside and outside of the operating device box. The operating direction of the output shaft connected to the arranged rotating lever and the operating directions of the closing spring and the breaking spring are set to be the same direction, and the direction is perpendicular to the back plate of the operator box. It is characterized in that the fixed side ends are fixed to the back side from the vertical direction, respectively.

[Work]

Since the electric spring operated gas circuit breaker according to the present invention is configured as described above, the force and reaction force of both springs do not act as a rotation moment on the back plate of the operator box as in the conventional case, but Since it operates almost vertically, the structure of the operating device box can be simplified.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a front view of a three-phase batch type electric spring operated gas circuit breaker, and FIG. 3 is a side view thereof.

The three-phase shutoff tanks 2 are supported on the gantry 5, and each shutoff tank 2 has a pair of bushings 1.
Has been established. There is a link case 3 between the shutoff tanks 2, and the movable portion of each shutoff unit is connected to the output shaft in the link case 3, as in the case of FIG. Second
The right end surface of the link case 3 in the figure is connected to an operator box 4 whose details will be described below.

The operating device box 4 is constructed as shown in FIG. That is, the output shaft 20 arranged in the link case 3 penetrates the back plate 6 partitioning the inside and outside of the operating device box 4, is led out into the operating device box 4, and is connected to the free end of the breaking spring 9. The shut-off spring 9 is arranged in the same direction as the operation axis of the output shaft 2, that is, on the same axis in this embodiment, and its left fixed end side is pressed against the inner surface side of the back plate 6 of the operation device box 4. It is fixed. The free end of the breaking spring 9 is connected to one end of a lever 19, which is rotated clockwise by the breaking spring 9. The toggle mechanism 12 is connected to the other end of the lever 19, and the toggle mechanism 12 is arranged such that the connection point 26 is located substantially in the vicinity of the dead sensor, and the upward component force applied to the connection point 26 is The roller 18 is rotated in the clockwise direction via the link, but the movement of the roller 18 is blocked by the shutoff control mechanism 13 including the trip lever 17 and the trip armature 16. This blocking force is removed by a command to the trip coil 15.

Further, the fixed end side of the closing spring 10 is press-contacted and fixed to the outer surface side of the back plate 6 of the controller box 4, and the free end of the closing spring 10 is connected to the closing cam 11 at a connecting point 27 via a link 25. The toggle mechanism is configured by these. In the illustrated state, the connection point 27 of the toggle mechanism is slightly beyond the dead center, and the clockwise rotation of the closing cam 11 by the closing spring 10 causes the closing lever 23 or the closing lever 23 engaged with the roller 24 provided in the closing cam 11 to rotate. Input control mechanism including input armature 22
It has been blocked by 14. This blocking force is
Removed by order to 21. In the illustrated closing state, the closing spring 10 is in a biased state by rotating the rotation shaft of the closing cam 11 in the clockwise direction by an electric mechanism (not shown), and this spring force is perpendicular to the back plate 6. That is, it acts in the axial direction parallel to the output shaft 20.

To turn off the gas circuit breaker, a current is applied to the trip coil 15, the trip armature 16 is attracted, the trip lever 17 is released from the engagement with the roller 18, and the connection point 26 is moved upward. The output shaft 20 is driven to the right while the spring force of the cutoff spring 9 is applied so as to rotate the lever 19 in the clockwise direction.

On the other hand, in the closing operation, power is supplied to the closing coil 21 to attract the closing armature 22, the closing lever 23 and the roller 24 are disengaged, and the closing cam 11 is rotated clockwise by the spring force of the closing spring 10. Let At this time, while the closing cam 11 pushes up the lever on the left side of the toggle mechanism 12 at the position of the alternate long and two short dashes line, the lever 19 is rotated counterclockwise and the output shaft 260 is rotated while energizing the shutoff spring. Drive to the left to put the breaker into the closed state. Thereafter, the closing cam 11 is further rotated in the clockwise direction by the electric mechanism (not shown) to urge the closing spring 10, and the state shown in the drawing is obtained.

In this embodiment, since the cutoff spring 9 is arranged in the controller box 4 on the shaft near the output shaft 20, when the output shaft 20 is driven by the cutoff spring 9 as compared with the conventional configuration, The operation time delay due to rattling of each connecting part is extremely reduced,
Further, since the direction change is small, the operation is smoothly performed. Further, the closing spring 10 is arranged so as to exert a spring force on the back plate 6 in a vertical direction, and the closing spring 10 is moved to the outside of the operating device box 2 to the second position.
As shown in the figure, since it is housed inside the spring case 28, the operating device box 4 can be constructed without increasing its size.

In this way, the operating directions of both springs 9 and 10 and the operating direction of the output shaft 20 are made the same, and the fixed end sides of both springs 9 and 10 are fixed so that the spring force acts on the back plate 6 in the vertical direction. Therefore, the back plate 6 is not subjected to the rotational moment as in the conventional case. Therefore, if the back plate 6 is manufactured with a thickness that can withstand the spring force and reaction force of both springs 9 and 10, the other portion 7 forming the operation device box 4 should have a small thickness. Moreover, the bracket 8 for supporting the rotary shaft of each lever is also simplified.

〔The invention's effect〕

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the output shaft (one end side is connected to the movable part of the blocking part of the blocking part tank and the other end side is A penetrating through the back plate of the operation device box and connected to a rotating lever arranged in the operation device box.), A breaking spring and a closing spring are provided, and a fixed plate of the breaking spring and the closing spring is attached to the back plate. Since only the back plate needs to be made of a strong material, the structure of the controller box as a whole can be simplified.Because a rotating moment is not applied to the back plate as in the past, hooks caused by unwanted vibration The risk of malfunction such as disconnection is small.

[Brief description of drawings]

FIG. 1 is a front view showing the inside of a controller box of an electric spring operated gas circuit breaker according to an embodiment of the present invention, and FIGS. 2 and 3 are entire electric spring operated gas circuit breakers according to an embodiment of the present invention. And FIG. 4 is a front view of a conventional electric spring operated gas circuit breaker, FIG. 5 is an enlarged front view showing the configuration in the controller box of FIG. 4, and FIG. It is a top view which shows the inside of the operator box of a figure, and an operation system. 2 ... shutoff tank, 3 ... link case, 4 ... operator box, 6 ... back plate, 9 ... shutoff spring, 10 ... closing spring,
20 …… Output shaft.

Claims (2)

(57) [Claims] 1. An output shaft, one end of which is connected to a movable part of a shutoff part in a shutoff tank, is passed through a back plate for partitioning the inside and the outside of the actuator box and is disposed in the actuator box. The shutoff spring and the closing spring are linked to the rotary levers respectively so that the spring force can be applied.
With the shutoff spring, the turning lever is turned in one direction to open the shutoff portion via the output shaft,
In an electric spring operated gas circuit breaker configured to rotate the rotating lever in the other direction by the closing spring to make the closing operation through the output shaft, the electric spring operated gas circuit breaker is substantially parallel to the operating direction of the output shaft. The breaking spring and the closing spring are arranged on an operation axis in a direction perpendicular to the back plate, and fixed ends of the breaking spring and the closing spring are fixed to the back plate, respectively. Electric spring operated gas circuit breaker. 2. The electric spring according to claim 1, wherein the shut-off spring is arranged inside the operation box and the closing spring is arranged outside the operation box. Operation gas circuit breaker.