KR20160141575A

KR20160141575A - Three position mechanism of gas insulated switchgear

Info

Publication number: KR20160141575A
Application number: KR1020150077457A
Authority: KR
Inventors: 김형진
Original assignee: 엘에스산전 주식회사
Priority date: 2015-06-01
Filing date: 2015-06-01
Publication date: 2016-12-09

Abstract

The present invention relates to a worm wheel which is rotatably provided in a body case and which is rotated to receive a driving force of a motor to form a DS / ES closing position or a DS / ES open position, A pair of limit switches corresponding to the rotation path of the worm wheel and providing a control signal for stopping the driving of the motor at the time of pressurization, And a stopper provided to interrupt rotation of the worm wheel when the worm wheel is rotated beyond the switching unit.

Description

[0001] THREE POSITION MECHANISM OF GAS INSULATED SWITCHGEAR [0002]

The present invention relates to a three-stage actuator for a gas insulated switchgear having a single-shaft structure of a disconnecting switch of a gas insulated switchgear (GIS).

Generally, a gas insulated switchgear (GIS) is composed of various devices such as a breaker, a disconnector, and a grounding switch. Among them, the disconnector and the grounding switch perform the operation of opening, closing and grounding of the main circuit.

At this time, in the case of electric operation, completion of operation is completed by turning off the power of the motor by the rotary switch assembled at each position completion position. In the case of manual operation, And determines the completion of the operation.

In the case of electric operation, the limit switch for determining the operation completion position malfunctions, and the operation of the motor is canceled by the manual operation of the motor. If the power can not be controlled, the over-run phenomenon can cause electrical accidents such as ground fault, short circuit, insulation breakdown, etc., and cause property or human casualty.

An object of the present invention is to provide an operation switch lever (disconnecting switch / earthing switch) and a manual handle shaft for manual operation, in order to prevent the occurrence of an overrun phenomenon caused by a malfunction of the three- And / or a grounding switch, and a shutter is provided in the insertion hole so as to be interlocked with the operation switching lever so as to determine what operation is to be performed by the operator, thereby preventing the occurrence of a short circuit or a ground fault. Thereby providing a simple operation unit.

In order to achieve the above object, a three-stage actuator of a gas insulated switchgear according to the present invention is rotatably provided in a body case, and is rotated by receiving a driving force of a motor to switch a DS / ES input position or a DS / ES open position A switch lever operatively provided in the body case for maintaining the switch in the DS state or the ES state, and a control unit for controlling the motor so as to stop driving the motor when the switch is pressed on the rotation path of the worm wheel, And a stopper which interrupts the rotation of the worm wheel when the worm wheel is rotated beyond the switching part due to a malfunction of the limit switch.

One end of the switching lever of the three-stage actuator of the gas insulated switchgear according to the present invention is positioned in the body case and the other end is positioned outside the body case through the body case, And is rotatably coupled.

When the other end of the switching lever of the three-stage operation device of the gas insulated switchgear according to the present invention is operated so as to face downward, it forms a disconnector (DS) position, and when the other end of the switching lever is operated to face upward, (ES) position.

In the three-stage actuator of the gas insulated switchgear according to the present invention, the first limit switch of the pair of limit switches provides a control signal to stop the driving of the motor when the DS input is completed by the rotation of the worm wheel, and the second limit switch And the control signal is provided so that the driving of the motor is stopped when the ES input is completed by the rotation of the worm wheel.

The stopper of the three-stage actuator of the gas insulated switchgear according to the present invention is disposed between the pair of limit switches among the bottom portions of the worm wheel and extends from the upper surface of the base frame forming the bottom surface of the body case to the pair of limit switches And is formed so as to protrude upward.

The three-stage actuator of the gas insulated switchgear according to the present invention is provided with an operation switching lever (disconnecting switch / grounding switch) for preventing the overrun phenomenon caused by malfunction of the three-stage operating device and minimizing the operator's mistake The manual handle shaft for manual operation is separately configured for the disconnector / earthing switch. The insertion hole is provided with a shutter interlocked with the operation change lever, so that the operator can decide what action is to be taken to prevent the occurrence of a short circuit or a ground fault can do.

1 is a schematic view of a three-stage actuator of a gas insulated switchgear according to the present invention.
2 is a view schematically showing a switching lever and a manual handle shaft of a gas insulated switchgear according to the present invention.
3 is a schematic view showing a state of engagement between a worm wheel and a worm gear of a three-stage actuator of a gas insulated switchgear according to the present invention.
4 is a view schematically showing a worm wheel rotated for an output shaft of a three-stage actuator of a gas insulated switchgear according to the present invention.
5 is a view schematically showing an open state of a three-stage actuator of the gas insulated switchgear according to the present invention.
FIG. 6 is a schematic view showing a closing state of a disconnector of the gas-insulated switchgear according to the present invention.
7 is a view schematically showing a state of putting a ground switch of the gas insulated switchgear according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-stage actuator of a gas insulated switchgear according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view of a three-stage actuator of a gas insulated switchgear according to the present invention.

2 is a view schematically showing a switching lever and a manual handle shaft of a gas insulated switchgear according to the present invention.

3 is a schematic view showing a state of engagement between a worm wheel and a worm gear of a three-stage actuator of a gas insulated switchgear according to the present invention.

4 is a view schematically showing a worm wheel rotated for an output shaft of a three-stage actuator of a gas insulated switchgear according to the present invention.

The gas insulated switchgear (GIS) according to the present invention is an insulated gas having excellent insulating performance and a good foaming function in a metal enclosed vessel (tank), and is used as an insulating medium to improve reliability by housing conductors and various protective devices It is a water distribution facility.

The gas insulated switchgear consists of various components such as a circuit breaker, a disconnecting switch (DS), and an earthing switch (ES).

The disconnector (DS) is a device for isolating the separated circuit from the power source by removing the load current in case of emergency, installing it on the front or rear of the high voltage, special high voltage bus, or before or after the device. In order to change the connection of the main circuit.

The opening and closing of the circuit of the disconnecting unit is performed by an operation unit. The operation unit is connected to a DS close (hereinafter referred to as "DS input"), ES close (hereinafter referred to as "ES input" / ES open "), a selective operation is performed by a motor that rotates in a forward or reverse direction while receiving power and a cam structure operated by the motor.

That is, when the actuator operates in the closing state or the open state in a state where the DS / ES switching lever 190 is positioned at the DS or ES position, the limit switch 160 is operated when the rod moves by the rotation of the cam, The operation is stopped.

1 and 2, the gas insulated switchgear according to the present invention includes a body case 100, a worm gear 120, a worm wheel 130 interlocked with the worm gear 120, a disconnecting / A stopper 135 for controlling the closing and opening of the limit switch 160, and a pair of limit switches 160.

The body case 100 is a box body formed to have an installation space in which various components are installed.

A three-position actuator having a single-shaft structure for the disconnector / earthing switch according to the present invention includes a switch lever 190 for determining an operating state, that is, a disconnector DS or a ground contactor ES, And a manual handle shaft 180 for manual operation is positioned at each of the disconnecting switch DS and the earthing switch ES. The switch lever 190 is provided with a shutter (not shown) a shutter (not shown) is provided.

At this time, the shutter (not shown) may block or open the handle insertion for manual operation according to the operation setting.

In accordance with the selection of the operation of the switching lever 190, a stopper (that is, disconnector / earthing switch open position stoppers) 135a and 135b connected by a link 170 and protruding and retracting, / Grounding switch closing positions) 135a and 135b.

3 and 4, the worm wheel 130 is rotated to receive a driving force of the motor 110 to allow the disconnecting switch DS and the earthing switch ES to be closed, DS) / grounding switch ES in an open state.

The worm wheel 130 and the motor 110 may be directly coupled to the motor 110. However, in consideration of the installation space, the worm wheel 130 and the motor 110 may be indirectly coupled to each other using a plurality of gears So that power transmission can be achieved.

The switching lever 190 is a lever that allows the disconnecting switch for operating the disconnecting unit to be switched to the disconnecting position (DS) position or the earthing switch (ES) position or the position can be maintained by the operation of the operator.

One end of the switching lever 190 is positioned in the body case 100 and the other end is positioned outside the body case 100 through the body case 100, And can be coupled up and down with respect to a rotation center located in the body case 100. [

In the present invention, when the other end of the switching lever 190 is operated downward, the position of the disconnecting switch (DS) forms a DS position. When the other end of the switching lever 190 is operated to face upward, Can be achieved.

The pair of limit switches 160 is an electrical safety device for stopping the operation of the worm wheel 130.

One of the limit switches 160 and 161 is provided to check the closing state of the disconnecting switch DS. The limit switch 160 is provided on both sides of the bottom of the worm wheel 130, And the other switch part can be provided for confirming the state of the grounding switch ES.

For example, the switch portion (hereinafter referred to as "first switch portion") 160 located on the left side of the drawing is configured such that when the DS input is completed by the rotation of the worm wheel 130 for DS input, (Hereinafter referred to as "second switch portion") 161 is provided with a control signal for stopping the driving of the worm wheel 130, When complete, the control signal is provided so that the driving of the motor 110 is interrupted.

When the stoppers 135 are rotated beyond the corresponding limit switches 160 and 161, the stoppers 135 are rotated by the stoppers 135, (Not shown) in order to prevent rotation of the jaws (not shown).

That is, when the worm wheel 130 is operated to open the DS (or ES) due to the operation of the limit switches 160 and 161 (for example, damage or contact failure) The mechanical stopping of the worm wheel 130 by the stopper 135 prevents the motor 110 from being damaged due to the load So that a ground fault can be prevented.

At this time, the stopper 135 is positioned between the pair of limit switches 160 and 161 of the bottom of the worm wheel 130, preferably a base frame (not shown) forming the bottom surface of the body case 100 And a pair of limit switches 160 protruding upward from the upper surface of the pair of limit switches 160.

The operation of the three-stage actuator of the gas insulated switchgear according to the present invention will be described in detail with reference to FIGS. 5 to 7. FIG.

5 is a view schematically showing an open state of a three-stage actuator of the gas insulated switchgear according to the present invention.

FIG. 6 is a schematic view showing a closing state of a disconnector of the gas-insulated switchgear according to the present invention.

7 is a view schematically showing a state of putting a ground switch of the gas insulated switchgear according to the present invention.

As shown in the figure, the electric operation is driven by the motor 110 and the manual operation is performed by the worm gear 120 using the manual handle 125 so that the worm wheel 130 is rotated and the output shaft connected to the worm wheel 130 is rotated. The power is transferred while rotating.

In the electric operation, the lever 150 connected to the output shaft rotates, and the limit switch 160 at the designated output angle operates to stop the motor 110, thereby completing the operation.

In the manual operation, the operation is completed as the worm wheel 130 stops by the stopper located at the specified angle.

5, when the stopper 135 connected to the link 170 by the operation selection of the switching lever 190 is in the closing position of the disconnector / grounding switch, the disconnector DS is in the open position state And the stopper 135b in the open position of the earthing switch ES are located.

6 shows that the switching lever 190 is positioned at the DS position and the worm wheel 130 is in the DS charging state.

6, when the worm wheel 130 rotates clockwise, the switching lever 190 is positioned at the disconnecting switch DS, and the stopper 135a is operated, so that the disconnecting switch DS is in the closing position state . At this time, the disconnecting switch DS is opened and the earthing switch ES is blocked.

6, since the worm wheel 130 presses the first switch portion 160, the motor 110 is not driven by the control signal of the first switch portion.

In addition, even if the motor 110 is driven due to a malfunction of the first switch unit 160 or a contact failure, the worm wheel 130 is blocked on the left side surface of the stopper 135, .

If the DS open control is performed due to an abnormality of the system or another cause in the above-described state, the motor 110 is driven according to the control, and the worm wheel 130 is rotated clockwise in the drawing.

In this process, when the worm wheel 130 reaches the DS open state, the worm wheel 130 can not be further rotated toward the ES insertion direction, and a mechanical interlock is performed.

7 shows that the switching lever 190 is located at the ES position, and that the circular wheel 130 is in the ES charging state.

7, when the worm wheel 130 rotates counterclockwise, the switching lever 190 is positioned at the earthing switch ES, and the stopper 135b is operated so that the earthing switch ES is turned on Position state. At this time, the earthing switch ES is in the open state and the earthing switch ES is in the open state.

7, since the worm wheel 130 presses the second switch portion 161, the motor 110 is not driven by the control signal of the second switch portion 161, The worm wheel 130 is blocked by the stopper 135 and is no longer rotated even if the motor 110 is driven due to a malfunction of the second switch unit 161 or a contact failure.

If the ES open control is performed due to an abnormality of the system or another cause in the above-described state, the motor 110 is driven according to the control, whereby the worm wheel 130 is rotated counterclockwise in the drawing .

If the worm wheel 130 reaches the ES open state, the worm wheel 130 can not be rotated toward the DS loading direction, and a mechanical interlock is performed.

As a result, even if the stopper 135 as described above causes malfunction of the limit switches 160 and 161, contact failure, or the like, it is prevented that the worm wheel 130 is undesirably rotated excessively. As a result, And the like can be prevented.

As described above, the three-stage actuator of the gas insulated switchgear according to the present invention is characterized in that the operation of the disconnecting switch and the grounding switch are separated by the switching lever, and when the user selects a desired operation, The stopper functions as a forcible means for forcibly stopping the operation of the limit switch when the limit switch is turned on and off to complete the operation in the electric operation, and completes the operation in the manual operation.

In the three-stage actuator of the gas insulated switchgear according to the present invention, the shutter that operates in conjunction with the switching lever blocks the handle insertion hole of the manual handle shaft for manual operation according to the operation selection of the disconnecting switch / earthing switch, Thereby preventing the occurrence of a short circuit or a ground fault.

Although the embodiments have been described with reference to the drawings, the present invention is not limited thereto.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

110: motor 120: worm gear
130: worm wheel 135: stopper
140: Output shaft 160, 161: Limit switch
170: Link 180: Manual handle shaft
190: Switching lever

Claims

A worm wheel rotatably provided in the body case and rotated to receive a driving force of the motor to achieve a DS / ES input position or a DS / ES open position;
A switch lever operably provided in the body case for maintaining the switch in a DS state or an ES state;
A pair of limit switches corresponding to the rotation path of the worm wheel to provide a control signal for stopping the driving of the motor when pressurized; And
And a stopper provided to prevent rotation of the worm wheel when the worm wheel is rotated beyond the switching unit due to a malfunction of the limit switch.

[2] The apparatus as claimed in claim 1, wherein one end of the switching lever is positioned in the body case and the other end is coupled to the body case through an up-and-down rotation based on a rotation center located in the body case, To
Three stage actuator of gas insulated switchgear.

The electronic device according to claim 1, further comprising a switch lever (20) which forms a disconnector (DS) position when the other end of the switch lever is operated to face downward, Wherein the gas-insulated switching device is a three-stage actuator.

2. The control device according to claim 1, wherein the first limit switch of the pair of limit switches provides a control signal to stop the driving of the motor when the DS input is completed by the rotation of the worm wheel, and the second limit switch Stage operation unit of the gas insulated switchgear, wherein the control signal is provided so that the driving of the motor is interrupted when the input is completed.

The limit switch according to claim 1, wherein the stopper is disposed between the pair of limit switches of the worm wheel and protrudes upward from the upper surface of the base frame forming the bottom surface of the body case between the pair of limit switches Of the gas insulated switchgear.