KR100802909B1 - Motor spring device for circuit breaker of gas insulated switchgear - Google Patents

Abstract

A motor spring device for a circuit breaker of a gas insulated switchgear is provided to enhance reliability by using a planetary gear and a carrier and prevent damage of components by mounting a carrier lock device. A motor spring device for a circuit breaker of a gas insulated switchgear comprises a fly wheel(180), an input ratchet(200), an input cam(190), a crank(350), a block ratchet(300), an input spring(400), a block spring(500), an electric motor(110), and a power transmitting part(100). The fly wheel is rotatably installed. The input ratchet selectively fixes the fly wheel. The input cam is rotated together with the fly wheel. The crank is installed to be rotatable about an axis in parallel with a rotation axis of the fly wheel and rotated in contact with the input cam. The block ratchet selectively fixes the crank. The input spring is transformed according to rotation of the fly wheel with a side thereof being connected to the fly wheel. The power transmitting part selectively transmits power of the electric motor to the fly wheel.

Description

Electric spring driving device for circuit breaker of gas insulated switchgear {MOTOR SPRING DEVICE FOR CIRCUIT BREAKER OF GAS INSULATED SWITCHGEAR}

1 is a side view showing a blocking state of a preferred embodiment of an electric spring driving device for a breaker of a gas insulated switchgear according to the present invention;

2 is a perspective view of the embodiment of FIG. 1,

3 is a side view showing a charging state of the embodiment of FIG.

4 is a perspective view of the embodiment of FIG. 3,

5 is a side view showing an input state of the embodiment of Figure 1,

6 is a perspective view of the embodiment of FIG. 5.

<Explanation of symbols for the main parts of the drawings>

 100: power transmission unit 110: electric motor

 120: sun gear 130: planetary gear

 140: carrier 150: ring gear

 160: carrier binding means 161: drive blocking cam

 162: drive blocking lever 170: reduction gear unit

 180: flywheel 190: input cam

 200: ratchet for feeding 300: ratchet for blocking

 350: crank 400: feeding spring

 410: spring head for feeding 420: wire for feeding

 430: guide roller 500: blocking spring

 510: blocking spring head 520: blocking wire

 530: guide roller

The present invention relates to a gas insulated switchgear, and more particularly to an electric spring drive device for a circuit breaker of the gas insulated switchgear.

In general, Gas Insulated Switchcharger (GIS) is provided in power transmission line or distribution line, and it is a device that protects power system by opening the line in abnormal condition such as ground and short circuit as well as opening and closing by normal state. to be.

The gas insulated switchgear is a major component of a substation (GCB, Gas Circuit Breaker), Disconnector (DS), Earthing Switch (ES), Lightning Arrester, Main Bus, etc. It is composed of and is filled with excellent insulation performance and inert sulfur hexafluoride (SF6) gas to reduce the size and safety of the substation.

The circuit breaker is a device that cuts off the current in case of an accident such as opening / closing a load, grounding, short circuit, etc. in a transmission / transmission system or an electric circuit. In particular, a circuit breaker in which a breaker is insulated with an insulator in a tank-type metal container filled with sulfur hexafluoride (SF6) insulating gas, which is a tasteless, odorless, and nontoxic inert high insulating gas having excellent insulating properties, is a circuit breaker that is normally used. It can be opened and closed manually, or can be opened and closed at a long distance by an electric control device outside the metal container. In addition, the breaker automatically cuts off the line in case of overload and short circuit to protect the power system and the load. In order to cut the circuit as above, the fixed contactor and the movable contactor are installed at the breaker of the circuit breaker, and normally, the fixed contactor and the movable contactor are brought into contact with each other to flow the current, and when a large current flows due to a fault occurring somewhere in the line. The moving contact is quickly removed from the stationary contact to cut off the current.

On the other hand, in the breaker of the gas insulated switchgear, it is divided into the air operation method, the hydraulic operation method and the spring operation method according to the method of operating the breaker.

First, the air operation method is simple in structure and can obtain a large operating force, but there is a problem that the operation of the compressed air is required, maintenance of the operating device is difficult, and performance decreases with temperature.

Next, the hydraulic operation method is expensive, as it is composed of a hydraulic cylinder, a pump, a hydraulic accumulator, etc., which must be maintained in a high precision to maintain airtightness. In addition, there is a problem in that a reliable current interruption operation cannot be performed because deviation of the breaker occurs due to oil leakage caused by long-term use and the breaker performance decreases due to a deviation in the operation time of the breaker and the speed of the movable contactor.

Finally, there is a spring operation method derived to overcome the problems of the air operation method and the hydraulic operation method as described above. Spring operation method uses spring force as blocking and input energy source, and it is easier to maintain operation force and manage operation device than air and hydraulic operation method. There is an advantage that can be minimized. However, in the conventional spring operation method, the combination of the link mechanism is complicated, and there is no specific alternative to the breakage of components due to the rapid inertia and rotational force.

The present invention has been made to solve the problems of the prior art as described above, by improving the structure of the spring drive device to completely block the driving force to improve the reliability and at the same time to breakage of components due to rapid inertia and rotational force An object of the present invention is to provide an electric spring driving device for a circuit breaker of a gas insulated switchgear that can be effectively prevented.

Other objects, specific advantages and novel features of the invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings.

In order to achieve the above object, an electric spring driving device for a circuit breaker of a gas insulated switchgear according to the present invention includes a flywheel rotatably installed, an input ratchet for selectively fixing the flywheel, and an input cam rotating together with the flywheel. And a crank rotatably mounted about an axis parallel to the axis of rotation of the flywheel, the crank rotated in contact with the feeding cam, a blocking ratchet for selectively fixing the crank, and one end connected to the flywheel to rotate the flywheel. A spring for input which is deformed according to the present invention, one end of which is connected to the crank, a blocking spring deformed according to the rotation of the crank, an electric motor, and a power transmission part for selectively transmitting power of the electric motor to the flywheel. The power transmission unit is a sun gear rotated by the electric motor, and the state A planetary gear rotating externally to both gears, a carrier having a fixed rotational axis of the planetary gear, a ring gear inscribed by the planetary gear and rotating externally to the flywheel, and a carrier restraining selectively restraining the rotation of the carrier It comprises a means.

In addition, in the present invention, the ring gear is characterized in that the planetary gear further includes a reduction gear unit for rotating the inner gear, decelerating the rotation of the ring gear to transfer to the flywheel.

In addition, in the present invention, the input cam has a profile that has a minimum lift section more than the maximum lift section, the carrier restricting means rotates together with the flywheel and the input cam, the maximum head of the input cam is reduced The maximum head is maintained for 1/2 rotation from the point where it starts to be rotated, and gradually decreases and rotates in contact with the drive blocking cam of the profile having the minimum head and the drive blocking cam, and the carrier at the maximum lifting of the drive blocking cam. Constrains the rotation of the drive blocking cam, characterized in that it comprises a drive blocking lever for releasing the restraint of the carrier at the minimum lift.

On the other hand, characterized in that it further comprises a blocking spring head fixed to one end of the blocking spring, and a blocking wire connected between the flywheel and the blocking spring head, for guiding the blocking wire It characterized in that it further comprises a guide roller.

The apparatus may further include a feeding spring head fixed to one end of the feeding spring, and a feeding wire connected between the flywheel and the feeding spring head, and a guide roller for guiding the feeding wire. It characterized in that it further comprises.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the electric spring drive device for a circuit breaker of the gas insulated switchgear according to the present invention.

1 is a side view showing a blocking state of a preferred embodiment of an electric spring driving device for a circuit breaker of the gas insulated switchgear according to the present invention, FIG. 2 is a perspective view of the embodiment of FIG. 1, and FIG. 3 is a charging of the embodiment of FIG. Figure 4 is a side view showing the state, Figure 4 is a perspective view of the embodiment of Figure 3, Figure 5 is a side view showing the input state of the embodiment of Figure 1, Figure 6 is a perspective view of the embodiment of Figure 5.

The electric spring driving device for the breaker of the gas insulated switchgear according to the present invention includes a flywheel 180, a ratchet 200 for feeding, a feeding cam 190, a crank 350, a blocking ratchet 300, and a spring 400 for feeding. ), A blocking spring 500, an electric motor 110 and a power transmission unit 100, the power transmission unit 100 is a sun gear 120, a planetary gear 130, a carrier 140 ), A ring gear 150, a carrier constraining means 160 and a reduction gear unit 170, the carrier constraining means 160 is composed of a drive blocking cam 161 and a drive blocking lever 162.

The flywheel 180 is rotatably installed, and a gear is formed on an outer circumferential surface to rotate externally with the ring gear 150 or the reduction gear unit 170 to be described later, and is selectively fixed by the ratchet 200 for feeding. In addition, the input spring 400 to be described later is deformed according to the rotation of the flywheel 180.

The ratchet 200 for feeding selectively fixes the flywheel 180. When the input ratchet 200 fixes the flywheel 180, a fixing part is formed on the flywheel 180 so that the input ratchet 200 may be fixed to the flywheel 180. When the feeding ratchet 200 fixes the flywheel 180, the feeding spring 400 is maximally compressed and the carrier 140 rotates. In addition, the ratchet 200 for inputting is rotatable and may release the restraint of the flywheel 180.

The input cam 190 rotates together with the flywheel 180, and the crank 350 to be described later is rotated in contact with the input cam 190. In addition, the input cam 190 has a more profile of the minimum head than the maximum head section. For example, the maximum head lasts for 1/8 of a turn, decreases from the maximum head for 2/8 turns to the minimum head, the minimum head lasts for 4/8 turns, and the maximum head rapidly rises at the minimum head for 1/8 turns. It can have a profile.

The crank 350 is installed to be rotatable about an axis parallel to the axis of rotation of the flywheel 180 and is rotated in contact with the input cam 190. According to the shape of the input cam 190, the crank 350 is rotated in contact with the input cam 190, the blocking spring 500 to be described later will be deformed according to the rotation of the crank 350.

The blocking ratchet 300 selectively fixes the crank 350. The crank 350 is fixed to the blocking ratchet 300 when the blocking spring 500 to be described later is maximally compressed according to the rotation of the crank 350. When the crank 350 is fixed to the blocking ratchet 300 and the blocking spring 500 is maximally compressed, it is a state in which an ordinary current is connected. In this case, when the load is opened or closed in a transmission or power transmission system or an electric circuit, or when the blocking ratchet 300 is rotated to cut off the current in case of an accident such as grounding or a short circuit, the restraint of the crank 350 is released to prevent the spring ( The crank 350 is rotated and blocked by the 500) force. The blocking ratchet 300 can be rotated manually or automatically.

One end of the spring 400 is connected to the flywheel 180 and is deformed according to the rotation of the flywheel 180. In addition, an input spring head 410 fixed to one end of the input spring 400 and the input wire 420 connected between the flywheel 180 and the input spring head 410 may be further included. It may further include a guide roller 430 for guiding the feeding wire 420. At the time of input, the energy stored in the input spring 400 is discharged and input, and at this time, the energy is stored in the blocking spring 500 to be described later as extra energy.

One end of the blocking spring 500 is connected to the crank 350 and is deformed according to the rotation of the crank 350. In addition, a blocking spring head 510 fixed to one end of the blocking spring 500 and the blocking wire 520 connected between the flywheel 180 and the blocking spring head 510 may further include. It may further include a guide roller 530 for guiding the blocking wire 520. By discharging the energy stored in the blocking spring 500 to perform the blocking operation of the circuit breaker.

The electric motor 110 converts electrical energy into mechanical energy and transfers energy to the sun gear 120 of the power transmission unit 100 to be described later.

The power transmission unit 100 selectively transmits the power of the electric motor 110 to the flywheel 180. That is, the carrier 140, which will be described later, transmits power to the flywheel 180 only when rotating. The power transmission unit 100 is a sun gear 120 rotated by the electric motor 110, a planetary gear 130 that rotates external to the sun gear 120, and the planetary gear 130 of A carrier 140 having a fixed rotation shaft, a ring gear 150 in which the planetary gear 130 is inscribed and circumscribed to the flywheel 180, and a carrier that selectively constrains rotation of the carrier 140. The means 160 is included. In addition, it is preferable to further include a reduction gear unit 170 to rotate with the ring gear 150 and to reduce the rotation of the ring gear 150 to transmit to the flywheel 180. Accordingly, the load on the ring gear 150 can be minimized.

The carrier constraining means 160 rotates together with the flywheel and the input cam, the maximum head is maintained for 1/2 rotation from the point where the maximum head of the input cam starts to decrease, and gradually decreases to reduce the minimum head. A drive blocking cam having a profile which rotates in contact with the drive blocking cam, restrains the rotation of the carrier at the maximum lifting of the drive blocking cam, and releases the restriction of the carrier at the minimum lifting of the driving blocking cam. It includes a shutoff lever. The driving blocking lever 162 rotates in contact with the driving blocking cam 161, and the driving blocking lever 162 restrains the rotation of the carrier 140 at the maximum lifting of the driving blocking cam 161. Accordingly, the driving force is transmitted to the flywheel 180 via the power transmission unit 100. However, at the minimum lift of the driving blocking cam 161, the driving blocking lever 162 releases the restraint of the carrier 140 so that the carrier 140 can rotate, and thus the planetary gear 130 has a ring. Since the engine 150 revolves along the inner gear, the driving force is not transmitted to the flywheel 180.

Hereinafter will be described the operation of the electric spring drive device for the breaker of the gas insulated switchgear according to the present invention. However, since the electric spring driving device for the breaker of the gas insulated switchgear of the present invention compresses the spring using the driving force of the motor and operates the breaker using the compressed spring force, the connection process for the closing and closing operation of the breaker. Since many techniques have already been disclosed, detailed descriptions will be omitted below, and a description will be given of the power transmission structure by the mechanism of the present invention and the operation process in the blocking, charging, and closing state.

First, the overall driving force transmission process will be described, the electric motor 110 is rotated so that the driving force of the electric motor 110 is transmitted to the sun gear 120, the driving force transmitted to the sun gear 120 is planetary gear 130 ) And carrier 140. Only when the carrier 140 is fixed, the planetary gear 130 rotates without revolving, so that the driving force of the planetary gear 130 is transmitted to the ring gear 150, thereby driving the flywheel 180. . Here, a reduction gear unit 170 that decelerates the rotation of the ring gear 150 may be provided, and the driving force may be transmitted by decelerating the flywheel 180. As the flywheel 180 rotates, an input spring 400 connected to the flywheel 180 is deformed. The drive blocking cam 161 and the input cam 190 rotate together with the flywheel 180, and the crank rotated in contact with the driving blocking lever 162 and the input cam 190 rotated in contact with the drive blocking cam 161. The driving force is transmitted to 350. As the crank 350 rotates, the blocking spring 500, one end of which is connected to the crank 350, is deformed. That is, the driving force of the electric motor 110 is finally transmitted to the closing spring 400 and the blocking spring 500 for adjusting the closing state and the blocking state of the breaker. Hereinafter will be described in detail the operation of the blocking state and the input state of the present invention.

1 is a view illustrating a state in which an electric spring driving device for a circuit breaker of a gas insulated switchgear according to the present invention is disconnected and a current of the circuit breaker is separated from the movable contactor and the fixed contactor. First, the gear of the electric motor 110 starts to drive the sun gear 120, and the drive blocking lever 162 in contact with the maximum head of the drive blocking cam 161 restrains the rotation of the carrier 140, so the sun gear ( The driving force of 120 is transmitted to the planetary gear 130, and the planetary gear 130 is rotated to transmit the driving force to the ring gear 150. As the ring gear 150 rotates, a driving force is finally transmitted to the flywheel 180 so that the flywheel 180 rotates clockwise. Therefore, the feeding cam 190 and the driving blocking cam 161 fixed to the same axis as the flywheel 180 rotate together, and the feeding spring 400 connected to one end of the flywheel 180 is compressed, and the feeding Energy is stored in the spring (400).

3 is a view illustrating a charging state of an electric spring driving device for a circuit breaker of the gas insulated switchgear according to the present invention, wherein the spring 400 for injection is compressed. When the flywheel 180 is continuously rotated from the blocking state and the spring 400 for injection is compressed to the maximum, the driving blocking lever 162 which comes into contact with the minimum head of the driving blocking cam 161 is rotated so that the carrier 140 is rotated. ) Will be released. Therefore, the carrier 140 rotates, and the planetary gear 130 having the shaft fixed to the carrier 140 revolves, and the driving force from the motor gear is not transmitted to the flywheel 180. Here, the flywheel 180 is fixed by the ratchet 200 for feeding. When the feeding ratchet 200 is rotated manually or automatically in a clockwise direction, the restraint of the flywheel 180 is released, and the flywheel 180 rotates clockwise by the feeding spring 400 force.

5 is a view illustrating an input state of an electric spring driving device for a breaker of the gas insulated switchgear according to the present invention, in which a current flows through the movable contact of the breaker and the fixed contactor. The driving blocking cam 161 and the input cam 190 rotate together with the flywheel 180, and the driving blocking lever 162 rotates in a counterclockwise direction when the head of the driving blocking cam 161 is increased to become the maximum head. The rotation of the carrier 140 is fixed. In addition, the crank 350 is rotated counterclockwise in contact with the larger amount of rotation of the input cam 190 and the crank 350 is caught by the ratchet 300 for blocking when the maximum head is reached. Constrain the meeting. However, the flywheel 180 is stopped by rotating more by the inertial force.

The input state is a normal state in which a current flows, and a state in which rotation of the crank 350 is restricted to cut off a current in case of opening / closing a load in an electric power transmission system or an electric circuit, or an accident such as grounding or short circuit occurs. When the blocking ratchet 300 is rotated in the clockwise direction to release the restraint of the crank 350, the crank 350 is rotated in the clockwise direction by the blocking spring 500 force and accordingly the blocking of FIG. It becomes a state.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

As described above, the electric spring driving device for the circuit breaker of the gas insulated switchgear according to the present invention is mechanically blocked by the planetary gear and the carrier, thereby improving reliability by providing a carrier restraining means and providing rapid inertia and rotational force. It is possible to effectively prevent damage to the component parts.

Claims (7)

A flywheel rotatably mounted, An input ratchet for selectively fixing the flywheel; An input cam rotating together with the flywheel, A crank rotatably installed about an axis parallel to the axis of rotation of the flywheel and rotated in contact with the feed cam; Blocking ratchet for selectively fixing the crank, An input spring connected to one end of the flywheel and deformed according to rotation of the flywheel; A blocking spring whose one end is connected to the crank and is deformed according to the rotation of the crank, Electric motor, It includes a power transmission for selectively transmitting the power of the electric motor to the flywheel, The power transmission unit includes a sun gear rotated by the electric motor, a planetary gear rotating externally to the sun gear, a carrier on which a rotation shaft of the planetary gear is fixed, and the planetary gear inscribed and circumscribed to the flywheel. And a rotating ring gear, and a carrier restraining means for selectively restraining rotation of the carrier. The method of claim 1, The ring gear rotates internally by the planetary gear, And a reduction gear part that rotates together with the ring gear and decelerates the rotation of the ring gear and transmits it to the flywheel. The method of claim 1, The input cam has a profile with a minimum head section than a maximum head section, The carrier binding means, A driving block cam of the profile which rotates together with the flywheel and the input cam, the maximum head is maintained for 1/2 revolution from the point at which the maximum head of the input cam starts to decrease, and gradually decreases to have the minimum head; And a driving blocking lever rotating in contact with the driving blocking cam, restraining the rotation of the carrier at the maximum lifting of the driving blocking cam, and releasing the restraining of the carrier at the minimum lifting of the driving blocking cam. Electric spring drive device for circuit breaker of gas insulated switchgear. The method of claim 1, And a blocking spring head fixed to one end of the blocking spring, and a blocking wire connected between the flywheel and the blocking spring head. The method of claim 4, wherein An electric spring driving device for a circuit breaker of a gas insulated switchgear further comprising a guide roller for guiding the blocking wire. The method of claim 1, And an input spring head fixed to one end of the input spring and an input wire connected between the flywheel and the input spring head. The method of claim 6, An electric spring driving device for a circuit breaker of a gas insulated switchgear, further comprising a guide roller for guiding the wire for feeding.

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