JPH10295011A - Operating equipment for switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent switching of a switchgear due to the turning of a drive lever together with an energy storing lever, during energy storage of spring performed by the turning of the energy-storing lever. SOLUTION: After the release of energy by a spring, in order to prevent the turning of a drive cam 6 together with an energy-storing cam 13, while a pin 14 of the energy-storing cam 13 falling to the right or left of the position (square) is storing the energy for the spring to (square) position as dead point, constraint levers 23a, 23b are provided and the drive lever 6 contacts to a constraint lever 28a or 28b only during energy storing, thereby prohibiting the turning of the drive lever 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device for an opening / closing section, and to ensure that the opening / closing operation of the opening / closing section is performed at high speed.

[0002]

2. Description of the Related Art FIG. 4 is an external perspective view of a gas insulated switchgear. The gas-insulated switchgear 1 is provided with a disconnector and a grounding switch. Opening and closing sections of these disconnectors and the like are opened and closed by the operation device 2.

[0005] The structure of a conventional operating device is shown in FIG.
(B). As shown in the figure, a pair of support plates 3a. A main shaft 5 is rotatably provided on 3b via a bearing 4. A drive lever 6 is fixed to the front side of the main shaft 5, while a driven lever 7 is fixed to the rear side.
The tip of the driven lever 7 is linked to a movable rod such as a disconnector. A hollow shaft 9 is rotatably provided on the main shaft 5 via a cylindrical bearing 8, and a spring receiver 10 is fixed to the hollow shaft 9. A spring 12 is provided between the support shaft 11 provided between the pair of support plates 3a and 3b and the spring receiver 10 at the upper portion in FIG. In addition, a substantially triangular energy storage lever 13 is fixed to the hollow shaft 9, and a pin 14 is fixed to a vertex of the energy storage lever 13 at a position corresponding to the spring receiver 10 in the circumferential direction. The pin 14 protrudes from a long hole 15 formed in the support plate 3a, and is engaged with a first notch 16 of the drive lever 6 formed along the circumference of a circle centered on the main shaft 5. A roller follower 18 for storing the spring 12 by rotating the storage lever 13 about the main shaft 5.
Are engaged with the second notch 17 of the energy storage lever 13 formed along the circumference of a circle centered on the main shaft 5. The roller follower 18 is provided on a screw shaft 20 that is linked to a motor (not shown) and that can rotate in the forward and reverse directions via a nut member 19 so as to be able to reciprocate. In addition, stoppers 21a and 21b are provided to stop the rotation of the reciprocating drive lever 6 at the "open" position and the "closed" position, respectively.

As shown in FIG. 5 (a), when the center line of the spring 12 is at the position (a) and the drive lever 6 is in contact with the stopper 21a, the driven lever 7 does not show a movable bar (not shown). Separated from fixed side conductor, disconnector DS opens
It has become. In this state, when a motor (not shown) is rotated to move the roller follower 18 leftward in FIG. 5A, the energy storage lever 13 rotates clockwise to accumulate the spring 12. Then, when the center line of the spring 12 reaches the dead point at the neutral line (b) and the pin 14 exceeds the dead point, the force of the spring 12 releases the pin 14.
The drive lever 6 which engages with the stopper 21 in FIG.
(b) at a high speed until it hits the clockwise direction. At this time, since the driven lever 7 pushes a movable rod (not shown) to abut on the fixed-side conductor, the disconnector DS is closed and the spring 12 is closed.
Center line occupies the position (c). On the other hand, when the roller follower 18 is moved rightward in FIG. 5A from the state in which the disconnector DS is "closed", the disconnector DS can be "opened" at a high speed contrary to the above.

However, since frictional resistance acts between the bearing 8 and the main shaft 5 and the hollow shaft 9, the center line of the spring 12 moves while being energized from the position (a) or (c) to the position (b). In the meantime, the main shaft 5 rotates in the same direction as the hollow shaft 9 rotates,
The disconnector DS opens and closes at low speed. For this reason, the movable rod and the fixed-side conductor are welded by the arc, and there is a possibility that an accident may occur due to deterioration of the electric conduction performance or insulation performance.

Therefore, instead of the bearing 8 shown in FIG. 5B, a bearing 19 integral with the support plate 3b can be provided as shown in FIG. 6 and the main shaft 5 can be provided in the bearing 19 via the bearing 4.

With this configuration, since the main shaft 5 is prevented from being rotated by the rotation of the hollow shaft 9, the "open" and "close" operations of the disconnector DS are not performed at a low speed. It is fast and reliable.

[0008]

However, since the bearing 19 fixed to the support plate 3b is interposed between the main shaft 5 and the hollow shaft 9, there is a problem that the operation device of the opening / closing portion becomes large.

Accordingly, an object of the present invention is to provide an operating device for an opening / closing section which solves the above-mentioned problem.

[0010]

According to a first aspect of the present invention, there is provided an opening / closing section operating device for rotating the opening / closing section by rotating the opening / closing section in a relatively opposite direction. A drive lever having a first notch is fixed along a circumference around the main shaft, and one end of the energy storage lever rotatable around the main shaft is engaged with the first no cut. A pin is provided and a spring is provided between the vicinity of the pin and the fixed portion, a second notch is provided on the other end of the energy storage lever along a circumference around the main shaft, and a second notch is provided. A pair of roller followers that engage with each other and are reciprocally movable in a direction substantially perpendicular to the main shaft are provided.The roller followers are connected to the motor in an interlocked manner. In the operating device for the opening / closing section provided with the first stopper, the pair of first switches is provided. The outer ends of the restraining levers are rotatably supported on the side opposite to the roller followers of the pair of first stoppers, and the inner ends of the respective restraining levers approach the main shaft. A restraining portion that restrains the drive lever from rotating in the rotating direction of the power storage lever during power storage, and a tapered portion that separates the inner end of the restraint lever from the main shaft by rotation of the pin, respectively. Formed on the restraint lever, a return spring that urges the inner end of the restraint lever toward the main shaft, and a second stopper that stops the rotation of the restraint lever whose inner end has turned toward the main shaft are provided, respectively. A protrusion is formed at an intermediate portion of each of the restraining levers, and has a circular arc surface centered on the main shaft, and is engaged with the protrusion by rotation of the drive lever, and the pin is engaged with the tapered portion. Of the restraining lever separated from the main shaft A cam for holding the end portion at a position distant from the main shaft is fixed to the drive lever. In addition to the above, the configuration of the opening / closing section operating device according to claim 2, further comprises: And a limit switch for detecting that the inner end of the restraining lever approaches the main shaft and stopping the rotation of the motor.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 of the opening / closing unit shown in FIG. 5 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.

The structure of the opening / closing section operating device according to the present invention is as follows.
This is shown in FIGS. In FIG. 1, a pair of stoppers for restraining the rotation of the drive lever 6 is omitted (see FIG.
1a and 21b), restraining levers 23a and 23b are provided above the respective stoppers so as to be rotatable about shafts 24a and 24b. This restraining lever is provided to prevent the driving lever 6 integral with the main shaft 5 from rotating at a low speed together with the energy storing lever 13 integral with the hollow shaft 9 when the spring 12 shown in FIG. Each restraining lever 23
so that the inner ends of the a and 23b rotate within a certain range,
Stoppers 26a and 26b for stopping the downward movement and a stopper 25 for stopping the upward movement are provided. In order to urge the inner ends of the restraining levers 23a and 23b downward, return springs 27a and 27b are provided as shown in FIG. A restraining portion 28 for restraining the rotation of the drive lever 6 when the restraining levers 23a and 23b move down.
a, 28b are formed on the restraint levers 23a, 23b. In addition, the restraint levers 23a, 23
In order to move the inner end of b upward, the tapered portions 29a and 29b for engaging the pin 14 are provided with the restraining levers 23a and 23b.
b formed on the lower surface of the inner end of the b
In order to maintain the inner ends of the a and b in this position, projections 30a and 30b are formed on the restraining levers 23a and 23b, while a cam 31 engaging with the projections 30a and 30b is provided on the drive lever 6 with a bolt 34. Attached through.
The cam 31 is formed with an arc portion 22 centered on the main shaft 5 so that one of the restraining levers keeps moving upward while the drive lever 6 rotates. In addition, limit switches 32a and 32b are provided for turning off a motor for driving the roller follower 18 when the disconnector DS becomes "open" or "closed". These limit switches 32a and 32b are configured to move down when the dogs 33a and 33b are opened and to switch off the motor.

Next, the operation of the opening / closing section operating device will be described with reference to FIG.
It will be described based on. As shown in FIG. 3 (a), when the drive lever 6 is tilted to the right and the disconnector DS is closed, the output shaft of the motor (not shown) rotates in a certain direction and the roller follower 18 moves to the right. Until the pin 14 comes over the dead point which is the position (b) shown in FIG.
2 are charged. At this time, the protrusion 30b is pushed by the cam 31 and the restraining lever 23b is in an up state, while the restraining lever 23a is open, so that the return spring 27a is released.
As a result, the drive lever 6 is prevented from rotating in the counterclockwise direction together with the energy storage lever 13 because the drive lever 6 comes into contact with the restricting portion 28a.

3 (b) to 3 (c), the roller follower 18 advances to the right end. During this time, the pin 14 engages with the tapered portion 29a to push up the inner end of the restraining lever 23a. The restraining portion 28a, which restrains the rotation of the drive lever 6 to the left, moves upward and the drive lever 6 is released. At the same time, the pin 14 comes into contact with the drive lever 6 in the first notch 16 and starts to move the drive lever 6 counterclockwise.

FIGS. 3 (d) to 3 (f) show the release force of the spring 12 caused by the pin 14 exceeding the dead point.
This shows a state in which the energy-storing lever 13 is turned counterclockwise and the drive lever 6 pushed by the energy-storing lever 13 is further turned counterclockwise. In the state of FIG. 3D, the projection 30a of the restraint lever 23a that has already been lifted is
After that, the inner end of the restraint lever 23a is maintained at a high position. In the state shown in FIG. 3 (f), the disconnector DS is opened at high speed by the urging force of the spring 12, and the projection 30b which has been engaged with the cam 31 is released from the cam 31. The inner end is lowered by the urging force of the return spring 27b, the dog 33b is lowered, and the limit switch 32b operates. Therefore, the switch of the motor for driving the roller follower 18 is turned off.

In this regard, conventionally, as shown in FIG. 7A, an auxiliary switch 37 connected between a motor and a power supply is used.
The lever 36 and the drive lever 6 are connected by a rod 35, and the auxiliary switch 37 turns off the motor switch. As shown in FIG. 7 (b), the switch is opened when the disconnector DS is closed. In consideration of the necessity of a push margin S for pushing the lever 36 of the auxiliary switch 37, the contact of the motor is switched just before the switch is completely opened or closed, so that the disconnector DS May stop at that position, but in the opening / closing section operating device according to the present invention, the contacts of the motor are not switched until the disconnector DS is completely opened or closed.

In this embodiment, the switching unit is the disconnecting switch DS, but the switching unit may be a ground switch.

[0018]

As can be seen from the above description, according to the opening / closing section operating device according to the first and second aspects, the drive lever is stored only while the storage lever is rotating for storing the spring. The opening / closing part is prevented from opening and closing at a low speed by providing a restraining lever that restrains it from rotating together with the power lever. No.

According to the opening / closing section operating device according to the second aspect of the present invention, since the limit switch which is operated by the movement of the restraining lever is provided, the motor is operated only when the opening / closing section is reliably opened or closed. Is turned off. Also,
There is no danger of chattering because the detection is not based on the fast movement of the energy storage lever or the drive lever.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of an opening / closing section operating device according to the present invention.

FIG. 2 is a front view and FIG. 2B is a right side view according to the embodiment of the opening / closing section operating device according to the present invention.

FIG. 3 is an operation explanatory view showing an embodiment of the opening / closing section operating device according to the present invention.

FIG. 4 is a perspective view of a gas insulated switchgear.

5A is a front view and FIG. 5B is a cross-sectional view of a main part of a conventional opening / closing section operating device.

FIG. 6 is a cross-sectional view of a main part showing a proposal for improving a conventional operation device for an opening and closing unit.

7A and 7B relate to an auxiliary switch for controlling rotation of a motor in a conventional switchgear operating device, wherein FIG.
FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 5 ... Spindle 6 ... Drive lever 12 ... Spring 13 ... Energy storage lever 14 ... Pin 16 ... First notch 17 ... Second notch 18 ... Roller follower 21a, 21b ... Stopper 22 ... Arc part 23a, 23b ... Constraining lever 26a, 26b: Stopper 27a, 27b: Return spring 28a, 28b: Restricted portion 29a, 29b: Tapered portion 30a, 30b: Projection 31: Cam 32a, 32b: Limit switch.

Claims (2)

[Claims] A drive lever having a first notch is fixedly attached to a main shaft which opens and closes an opening / closing portion by being rotated in a relatively opposite direction along a circumference centered on the main shaft. A pin is provided at one end of the energy-storing lever that is rotatable around the center, and a pin is provided for engaging with the first notch, and a spring is provided between the vicinity of the pin and the fixed portion. Is provided with a second notch along the circumference around the main shaft, and a roller follower that engages with the second notch and that can reciprocate in a direction substantially perpendicular to the main shaft is provided, and the roller follower is linked to the motor An opening / closing section operating device provided with a pair of first stoppers for stopping the rotation of the drive lever on both sides of a neutral line connecting the fixed portion and the main shaft, wherein the pair of first stoppers correspond to the pair of first stoppers; At the opposite side of the roller follower of one stopper, The end portions are rotatably supported, and when the inner ends of the respective restraining levers approach the main shaft, the drive levers rotate in the rotation direction of the energy storage lever during energy storage. A return spring that forms a restraining portion for restraining and a tapered portion that separates the inner end of the restraining lever from the main shaft by rotating the pin on each restraining lever, and biases the inner end of the restraining lever toward the main shaft. And a second stopper for stopping the rotation of the restraining lever whose inner end has turned toward the main shaft, and forming a protruding portion at an intermediate portion of each of the restraining levers, while forming an arc around the main shaft. A cam that holds the inner end of the restraining lever separated from the main shaft at a position separated from the main shaft by engaging the protrusion with the rotation of the drive lever and engaging the pin with the tapered portion. Opening characterized by being fixed to the drive lever Operating device for the closing part. 2. A pair of restraining levers, on the side opposite to the main shaft,
2. The opening / closing section operating device according to claim 1, further comprising limit switches for detecting that the inner end of the restraining lever approaches the main shaft and stopping rotation of the motor.