KR101869720B1 - Gas insulated switchgear - Google Patents

Abstract

One embodiment of the present invention is a power transmission device comprising: a power transmission part for transmitting power to a ground by a ground to make the ground moving; A spring hingedly connected to the power transmission portion and compressed by rotation of the power transmission portion to store the power in the form of elastic energy and to extend after a predetermined time to delay power transmission; An enclosure having the power transmission portion and the spring; And a control device for maintaining the compression state of the spring for a predetermined time to control the delay of the power transmission.
According to the present invention, it is possible to operate the earthing switch at a time when an opening / closing operation of a earthing switch for a gas insulated interrupter is required, and to operate in conjunction with another operating device when an accurate input time is required, It is effective.

Description

[0001] GAS INSULATED SWITCHGEAR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulation breaker, and more particularly, to a gas insulation breaker having a ground switch.

Generally, a circuit breaker is used to open and close a load in a transmission /

Or a device that cuts off current when an accident such as grounding or short circuit occurs.

Particularly, the gas insulated switchgear has a form in which the shielding portion is disposed in a tank-type case filled with SF6 insulating gas, which is a tasteless, odorless, nontoxic inert insulating gas having excellent insulating properties. These gas insulated breakers can be opened and closed by manually opening and closing the transformer in a normal use state or by a manipulator installed outside the case, etc., and it is possible to open and close the load current under normal use conditions, To protect the ammeter passing load device.

As described above, the gas-insulated circuit breaker for shutting off the converter is provided with a fixed contact and a movable contact on the cut-off portion so that the fixed contact and the movable contact are brought into contact with each other so as to make a current flow. In the case where a large current The moving part is separated from the fixed part at a high speed to cut off the current.

The operation unit moves the cylinder rod connected to the cylinder to an interruption position by an operation force generated by hydraulic pressure, pneumatic pressure or an electric spring charged by a motor, and when the insulated insulated SO gas is compressed by the movement of the cylinder rod, A high-pressure SOH gas is injected into the arc to cool down the fault current to cut off the current.

The movable contactor must be separated from the stationary contactor at a very high speed in order to shorten the time during which the fault current is energized as much as possible. Therefore, it is necessary to be able to perform a quick shutdown operation, and an example thereof is disclosed in U.S. Patent No. 7,528,336.

In addition, conventionally, the compressed electric spring is inflated immediately beyond the dead point, and the timing control of the opening and closing operation of the actuator is almost impossible. Especially, there is a problem that it is difficult to control when the opening / closing operation time control such as ES marking test is required or when it has to operate in connection with other operation structure.

The present invention aims to operate the earthing switch at a time when the earthing switch is required to be opened and closed in a state in which the spring is restrained from being expanded immediately beyond the dead point.

According to an embodiment of the present invention, there is provided a power transmission device comprising: a power transmission part for transmitting power to the ground by a power source to operate a grounding device; A spring hingedly connected to the power transmission portion and compressed by rotation of the power transmission portion to store the power in the form of elastic energy and to extend after a predetermined time to delay power transmission; An enclosure having the power transmission portion and the spring; And a control device for maintaining the compression state of the spring for a predetermined time to control the delay of the power transmission.

The control device comprising: a latch connected as a hinge to the enclosure and in contact with the power transmission to maintain the compression of the spring for a predetermined time to delay power transmission to the ground mover; And a pressing portion for releasing contact between the power transmitting portion and the latch to pivot the hinge of the latch by pressing the latch.

Meanwhile, as another embodiment of the present invention, the control device may include: a predetermined time at which the power transmitting portion and the latch are in contact with each other at a first position; And a predetermined time at which the pressing portion is located at a second position for pressing the latch to release contact between the power transmission portion and the latch.

The compressed state of the spring may be a state in which the spring is in a compressed state when a distance between a hinge shaft connecting the spring and the enclosure and a hinge shaft connecting the spring and the power transmission unit becomes minimum, May be provided.

And the pressing portion is a solenoid valve having a pressing pin that presses the latch for a time to be positioned at the second position.

The control device may further comprise an assembly including a fixing part fixable to the enclosure.

According to another embodiment of the present invention, the power transmission portion may include a plurality of lever portions, and the plurality of lever portions are connected to the spring by a hinge, and when the power transmission portion is pivoted by the power transmitted by the motor, A first lever part for compressing a spring and transmitting power as the spring is extended; A second lever portion that cooperates with the first lever portion to coaxially rotate together and is coupled to the first lever portion and transmits power; And a third lever part coupled to the second lever part by another axis and rotating the second lever part about the other axis to actuate the movable contactor.

In this case, the first lever portion and the second lever portion are coupled through an end formed at a predetermined depth.

The first lever portion and the second lever portion may be lever portions.

At this time, the second lever portion has a connecting pin, and the third lever portion has a slot hole through which the connecting pin can move, and the connecting pin is located inside the slot hole, and the second and third And the lever portion is coupled as a sliding hinge.

Further, the first lever portion further includes a contact portion which contacts the latch for a predetermined time to stop the rotation of the power transmitting portion for a predetermined time.

At this time, the contact portion is formed to be inclined upward when contacting the latch according to the rotation of the first lever portion, and a contact portion of the contact portion with the latch is rounded.

According to another embodiment, the latch further includes a roller portion that makes contact with the contact portion while the latch rotates and rolls to smooth the rotation of the latch.

At this time, the roller portion is coupled to one side of the latch which contacts the contact portion.

It is possible to operate the earthing switch at the time when the opening and closing operation of the earthing switch for the gas insulated circuit breaker is required and to operate the earthing switch in cooperation with the other operating device when the exact opening time is required.

The control device including the latch and the pressurizing portion is modularized and can be easily attached to and detached from the enclosure, so that the module can be detached and attached as the module for maintenance or the like as needed.

1 is a perspective view of a ground switch of a gas insulator according to an embodiment of the present invention;
Fig. 2 is a plan view of a grounding switch showing a state in which the spring of the embodiment of Fig. 1 starts to be compressed. Fig.
FIG. 3 is a plan view of a grounding switch showing a state in which a spring is compressed in FIG. 2; FIG.
Fig. 4 is a plan view of the earthing switch showing a state in which the spring is elongated in Fig. 3; Fig.
Fig. 5 is a plan view of a grounding switch showing the control device in Fig. 3; Fig.
6 is a plan view of a grounding switch showing the control device in Fig.
7 is a perspective view showing a process in which a grounding mover operates.

The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

The present invention is for controlling the operating point of the movable contactor when operating the gas insulated breaker. The power generated in the drive unit of the motor is transmitted to the power transmission unit and the elastic energy stored in the spring 200 is converted into rotational power through compression and expansion of the spring 200, . At this time, after the spring 200 is compressed, the latch 520 provided in the control device 500 prevents the rotation of the power transmitting portion 300, so that the spring 200 is extended after a predetermined time .

This is because the operation time of the movable contactor is delayed by the above-described configuration, so that the viewpoint control is possible. A control device 500 for controlling the time may be further provided.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 illustrates a ground switch for a gas insulated switchgear according to an embodiment of the present invention.

The earthing switch includes an enclosure 100, a spring 200, a power transmission portion 300, and a control device 500. The enclosure accommodates a grounding switch, and may have a bottom surface and at least one side wall, and the spring 200, the power transmission unit, and the control device 500 may be directly fixed. One end of the spring 200 is connected to the enclosure 100 as a hinge 101 and the other end of the spring 200 is connected to the power transmission unit 300 as a hinge 312.

The driving unit generates rotational power in a motor or the like and transmits the generated power to the power transmitting unit 300 through the provided rotating element 400. [ The rotary element 400 may be a worm wheel or a throwing crank. The operation of the ground contact connected to the output shaft is shown in FIG. 7 and described below.

2 to 4 show a point-in-time control due to the compression and extension state of the spring 200, the operation of the control device 500, and the power is transmitted to the movable contact via the power transmission portion 300.

2 shows a state in which the power transmitting portion 300 is rotated by the power generated by the driving portion and the spring 200 starts to be compressed. That is, when an abnormal current such as a short-circuit is caused to flow in the circuit, the driving unit is operated and the power transmission unit 300 starts rotating in the direction of the arrow.

The power transmitting portion 300 may include a plurality of lever portions including a first lever portion 310, a second lever portion 320, and a third lever portion 330.

The first lever portion 310 may be a cylindrical member or a combination of different outer diameters, and is rotatable about a single axis.
The first lever portion 310 includes a coupling portion 311 and a contact portion 313 formed radially outward.
The coupling portion 311 is connected to the spring 200 as a hinge 312 and the contact portion 313 contacts the latch 520 in a compressed state of the spring 200.
The contact portion 313 is inclined upward when the first lever portion 310 contacts the latch 520 according to the rotation of the first lever portion 310. A contact portion of the contact portion 313, And is rounded.
The angle between the engaging portion 311 and the protrusion 313 forms an obtuse angle so that stress due to the spring 200 and the latch 520 can be effectively dispersed. The first lever part 310 is coupled to the rotary element 400 of the driving part. An end of the first lever part 310 may be coupled to the end of the rotation element 400. [ Accordingly, the first lever portion 310 can be rotated coaxially with the rotary element 400 by the transmitted power.

3 shows a state in which the power generated in the driving portion is transmitted to the power transmission portion 300, particularly, the first lever portion 310, and the first lever portion 310 is rotated by about 90 degrees. The spring 200 begins to be compressed and is compressed to a position where the distance between the two hinges 101 and 312 of the spring 200 is the closest. This state is defined as the compression state of the spring 200 in the present invention. The contact portion 313 of the first lever portion 310 rotates and comes into contact with one end of the latch 520. [ The latch 520 does not rotate about the hinge 521 even after contacting the first lever portion 310, and maintains the original state. The rotational power generated in the driving unit is stored in the form of elastic energy as the spring 200 is compressed. In order to maintain the compressed state of the spring 200, a large stress may be applied to the latch 520. Compression of the spring 200 and contact with the latch 520 will not cause the second and third lever portions 320 and 330 to pivot and delay power transmission of the movable contact.

FIG. 4 shows an example of the present invention in which the solenoid valve 510 is operated after a predetermined time after the spring 200 is in a compressed state.

When the latch 520 is pivoted by the pressing portion 511 and the contact of the first lever portion 310 with the contact portion 313 is released, the compressed spring 200 is stretched by the stored elastic energy, 1 and the second lever portions 310, 320 rotate in the direction of the arrow.

Since the first and second lever portions 310 and 320 form an end of a predetermined depth and are coupled, the first and second lever portions 310 and 320 rotate at the same angular velocity coaxially. The first and second lever portions 320 and the rotary element 400 of the driving unit rotate coaxially while covering the rotation center axis and the rotation center axis may be disposed inside the first lever unit 310 or the like so as to rotate them. The axis of rotation may be secured to the enclosure or to other components within the enclosure.

The first and second lever portions 310 and 320 may be formed as a lever portion, which is a component. In this case, the lever part as one component performs all the functions of the first and second lever parts 310 and 320 described above.

Meanwhile, the second lever portion 320 includes a connecting pin, and the third lever portion 330 has a slot hole, which are coupled to each other by a sliding hinge.

The connecting pin moves in the slot hole of the third lever part 330 by the rotation of the first and second lever parts 310 and 320 and the third lever part 330 receives the force in the slot hole, Turns in the direction of the arrow around the axis. The second and third lever portions 320 and 330 are coupled by a sliding hinge so that the connecting pin of the second lever portion 320 is engaged with the third lever portion 330 during the rotation of the second lever portion 320. [ And moves from one side to the other within the slot hole to exert a force on the third lever portion 330. The applied force causes the third lever portion 330 to rotate around the other axis, and the other shaft serves as an output portion of the power transmitting portion 300, and the movable contactor operates by the rotational force to operate the circuit breaker.

5 and 6, the operation of the control device 500 provided with the roller portion 522 will be described below.

In the compressed state of the spring 200 shown in FIG. 5, the roller portion 522 comes into contact with the contact portion 313. The pressing portion 511 presses the other end of the latch 520 at the time when the opening and closing operation is required while maintaining the contact state until just before the opening and closing. At this time, the roller portion 522 rotates against the contact portion 313 to rotate, and the latch 520 rotates the hinge 521 of the latch 520 in the direction in which the contact is released.

5, one end of the latch 520 is in contact with the power transmitting portion 300, which allows the spring 200 to maintain a compressed state, and the rotation of the power transmitting portion 300 due to sudden extension prevent.

Fig. 6 shows a state in which the pressing portion 511 presses the latch 520. Fig. Accordingly, the spring 200 is elongated, and the elastic energy stored in the spring 200 transfers rotational power to the third lever portion 330. Accordingly, the circuit breaker can be operated by the operation of the ground contact connected to the third lever part 330. [

7 is a perspective view showing a process in which a grounding mover operates.

7, the third lever unit 300 is connected to the driving rod 710 and is transmitted to the link shaft (not shown) through the driving rod 710 and the driving lever 720, The link lever 730 is rotated, and the earth moving member 740 linearly moves through the link inside the link case. When the grounding member 740 is inserted into the grounding stator 750, the line is grounded through the grounding busbar.

The control device 500 may include a latch 520 and a pressing unit 511.

The latch 520 is an obtuse ' L-shaped member, for example. And is connected to the fixing portion 530 or the enclosure as a hinge 521 at the bent portion. It is necessary to contact the contact portion 313 of the first lever portion 310 to prevent instantaneous extension of the compressed spring 200 and a large stress may be applied to the latch 520. [ Therefore, the latch 520 is required to have appropriate strength and durability, and can be heat-treated as needed, such as Q.T. The latch 520 may be connected as a hinge to the enclosure and if the control device 500 is a single assembly the assembly includes a fixed portion 530 and a latch 520 connected as a hinge to the fixed portion 530 And the pressing portion 511 can be engaged with each other.

The latch 520 may further include a roller portion 522 which is in contact with the contact portion 313 and rotates in contact with the contact portion 313. The roller portion 522 is a rotatable element at one side of the latch 520, and is a replaceable component at breakage. The roller portion 522 should have the properties of withstand pressure and abrasion resistance

The pressing unit 511 may be a solenoid valve 510, a relay, or the like. When the pressing portion 511 is a solenoid valve 510, a pressing pin may be provided inside the coil and the coil. When a current is applied to the coil, the pressing pin receives a downward force, So that the latch 520 is rotated.

The control device 500 may further include a control unit (not shown). The control unit controls the pressing force of the pressing unit 511 at a first position at which the power transmitting unit 300 and the latch 520 are in contact with each other and at a time when the pressing unit 511 presses the latch 520 to the maximum, It is possible to control the time at the second position. In addition, the thickness of the coil or the number of times the coil is wound around the pin may be adjusted to increase the speed at which the pressing portion 511 presses the other end of the latch 520 by moving the pin by applying a larger force to the pin .

The control device 500 may be an assembly including a latch 520 and a pressing portion 511 and may be an assembly including a latch 520, a pressing portion 511 and a control portion. have.

An example of the assembly is that the latch 520 is connected to the fixing portion 530 as a hinge 521 and the pressing portion 511 and the control portion can be fixed to the fixing portion 530. The fixing portion 530 is fixed to the housing by assembling a bolt or the like. The control device 500 may be a component, and the control device 500 can be detached and attached at one time, thereby facilitating replacement and maintenance.

The first lever part 310 may contact one end of the latch 520 of the control device 500 to operate the earthing switch at the time of requesting the opening and closing operation of the earthing switch, . As a result, the spring 200 can be kept in a compressed state.

100: enclosure 200: spring 300: power transmitting portion 310: first lever portion
313: contact portion 320: second lever portion 330: third lever portion 400:
500: Control device 510: Solenoid valve 520: Latch
522: roller portion 530:

Claims (13)

A power transmission portion for transmitting power to the ground by the power supply for operating the grounding conductor;
A spring hingedly connected to the power transmission portion and compressed by rotation of the power transmission portion to store the power in the form of elastic energy and to extend after a predetermined time to delay power transmission;
An enclosure having the power transmission portion and the spring; And
And a control device for maintaining the compression state of the spring for a predetermined time to control the delay of the power transmission,
The control device includes:
A latch connected as a hinge to the enclosure and in contact with the power transmission to maintain the compression of the spring for a predetermined time to delay power transmission to the ground mover; And
And a pressing portion for pressing the latch such that the latch rotates the hinge about the axis to release contact between the power transmitting portion and the latch,
The power transmitting portion includes a plurality of lever portions,
Wherein the plurality of lever portions
A first lever part connected to the spring and hinge to compress the spring according to the rotation transmitted by the motor, and to transmit power as the spring is extended;
A second lever portion that cooperates with the first lever portion to coaxially rotate together and is coupled to the first lever portion and transmits power;
And a third lever part coupled to the second lever part with another axis and rotating the second lever part about the other axis to actuate the movable contactor,
Wherein the first lever portion further comprises a contact portion for contacting the latch for a predetermined time to stop the rotation of the power transmitting portion for a predetermined time,
The contact portion is formed to be sloped upward when it contacts the latch according to the rotation of the first lever portion,
Wherein a contact portion of the contact portion with the latch is rounded. delete The method according to claim 1,
The compressed state of the spring,
A hinge shaft connecting the spring and the enclosure;
Wherein the spring is in a compressed state when a distance between the hinge axis connecting the spring and the power transmission portion is minimized. The method according to claim 1,
Wherein the pressurizing portion is a solenoid valve having a pressing pin for pressing the latch so as to pivot so as to release contact between the latch and the contact portion. The method according to claim 1 or 4,
Wherein the control device further comprises an assembly including a fixing part which is detachable and attachable to the enclosure and to which the latch is connected as a hinge and in which the pressing part is fixed. delete delete The method according to claim 1,
Wherein the first lever portion and the second lever portion are coupled through a step formed at a predetermined depth. The method according to claim 1,
Wherein the first lever portion and the second lever portion are a part. The method according to claim 1,
The second lever portion has a connecting pin, and the third lever portion has a slot hole through which the connecting pin can move, and the connecting pin is located inside the slot hole, and the second and third levers Wherein the additional sliding hinge is coupled as an additional sliding hinge. delete delete The method according to claim 1,
The latch
Further comprising a roller portion that makes contact with the contact portion while the latch is rotating so as to smoothly rotate the latch.

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