KR100344847B1 - appatus for driving 3-position switcher apparatus - Google Patents

Abstract

The present invention is connected to the driving terminal of the three-position switch by the drive device operating according to the 'on / off' of the circuit breaker to rotate the movable terminal for opening-closing-ground of the switch by the operation of the drive device To do it.

Therefore, not only the opening-closing operation of the three-position switchgear but also the grounding operation are automatically performed, so that an accidental opening-closing-grounding action due to electromagnetic force, gravity, or vibration does not occur.

To this end, the present invention is vertically rotated about an axis by a motor, the first spindle shaft and the second spindle shaft formed with a thread on the circumference, and the first and second spindle shaft is mounted on the first and second spindle shaft The first guide nut and the second guide nut, which move up and down when rotating, and the left and right ends are axially engaged with the side surfaces of the first and second guide nuts, so as to move a predetermined movement together with the first and second guide nuts. A drive bar moving up and down within the drive bar, connected to one side of the drive bar and positioned above the drive bar, and connecting means for changing the up and down movement of the drive bar to the rotation of the switch operating terminal; A driving position of a three-position switch, which is positioned and connected to one side of the driving bar and includes locking means for preventing the driving bar from moving downward in an 'on' state of the circuit breaker. To provide

Description

Apparatus for driving 3-position switcher apparatus

The present invention relates to a three-position switchgear, and more particularly to a drive of a three-position switchgear for operating the three-position switchgear more accurately and safely.

Electricity generated at a voltage of about 20,000V at the power plant is boosted to ultra-high voltage connected to the power transmission station and is transmitted to the primary substation, and the primary substation drops the supplied power to 22.9V and supplies it to the secondary substation or each customer. .

Power supplied from the primary substation is supplied to each customer's power receiving facility through a distribution system consisting of overhead distribution lines and underground distribution lines.

At this time, a three-position switch (hereinafter referred to as a switch) driven by three open / closed-ground contacts is used for the purpose of branching and branching the underground distribution line.

As shown in the drawing, the switch is filled with S ₆ gas for insulation purposes and the T-shaped case 17 whose cross section is divided into a horizontal portion 15 and a vertical portion 16 and the case ( 17 is installed at one side of the horizontal part 15 of the horizontal sub-station 15, the electricity is supplied from the primary substation, and the case 17 is installed in the center of the horizontal part 15 and electrically connected to the power receiver 10 The fixed terminal 13 to be connected and the electricity supplied from the power receiving unit 10 installed at the lower end of the case 17 are branched to the power distribution unit 12 which is connected to the power distribution line.

A movable terminal 20 for forward and reverse rotation by a motor (not shown) is axially coupled to the power distribution unit 12, and one side of the vertical portion 16 is present inside the opening of the switch. A ground terminal 14 for discharging electricity is provided.

In addition, the switch is separately provided with a device such as a circuit breaker for safe operation with respect to each contact.

Accordingly, as shown in the drawing, the movable terminal 20 which is in contact with the fixed terminal 13 and maintains the closed state of the switch is rotated in a counterclockwise direction (based on the drawing) by the motor to fix the fixed terminal 13. ) And the ground terminal 14, the switch is opened.

On the other hand, in order to discharge the switch in the open state, the movable terminal 20 is rotated counterclockwise to be in contact with the ground terminal 14 so that the switch is grounded.

However, such a switch showed the following problems.

Since the movable terminal mounted to the switch is rotated by a single motor, the opening-closing operation of the switch is automatically performed by the motor, but the movable terminal located between the fixed terminal and the ground terminal to ground the switch is The process of contacting the ground terminal by rotating has shown a problem made by manual.

In addition, due to the above-mentioned reason, the switch has an accidental opening-closing-ground operation caused by electromagnetic force, gravity, or vibration, thereby indicating a safety problem.

The present invention has been made to solve the above problems, the opening-closing-ground operation of the switch is to be all made automatically, the opening-closing-ground by fixing the position of the movable terminal at each catch point of the switch The goal is to avoid accidental movements.

1 is a cross-sectional view showing the configuration of a conventional three-position switch.

Figure 2 is a front view showing the configuration of a drive device of a three-position switchgear according to the present invention.

3A to 3D show the operation of the drive device of FIG. 2;

Explanation of symbols for main parts of the drawings

13: fixed terminal 14: ground terminal

20: movable terminal 30: drive device

31: first spindle shaft 32: first spindle shaft

33: drive lever 34: first guide nut

35: 2nd guide nut 38: drive crank

39: drive wing 40: first connecting rod

41: second connecting rod 42: third connecting rod

43: locking plate 44: interlock plate

45: Bevel Gear

In order to achieve the above object, the present invention generates an accurate and fixed operating displacement of the movable terminal mounted in the switch, and drives the 3-position switch to rotate the movable terminal according to the 'on / off' of the circuit breaker. Provide the device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The same components and the same reference numerals are assigned to the same components as the prior art, and detailed description thereof will be omitted.

As shown in FIG. 2, the driving device (hereinafter referred to as driving device) 30 of the three-position switchgear according to the present invention is vertically positioned and rotated about an axis by a motor (not shown), and a thread is formed on the circumference. The first spindle shaft 31 and the second spindle shaft 32 and the first and second spindle shafts 31 and 32 are mounted at predetermined positions so that the first and second spindle shafts 31 The first guide nut 34 and the second guide nut 35, which move up and down when the 32 rotates, and the left and right ends thereof are opposite to the side surfaces of the first and second guide nuts 34 and 35, respectively. A driving bar 33 that is axially coupled and moves up and down with the first and second guide nuts 34 and 35, and is positioned above the driving bar 33 to drive the driving bar 33. The connecting means 36 for changing the movement of the up and down of the switch to the rotation of the switch operating terminal 20 and the drive bar 33 are located below to prevent malfunction of the drive device 30. The basement is composed of locking means 37.

The first and second spindle shafts 31 and 32 rotate about the axis of the motor when the motor is driven by a bevel gear 45 installed at the bottom or top.

In addition, the first and second spindle shafts 31 and 32 are provided with upper and lower pieces 46 and 47, respectively, so that the driving bar 33 has a constant displacement and moves up and down. Each of the engaging pieces 46 and 47 formed on the spindle shafts 31 and 32 has the same height so that the driving bar 33 is horizontally maintained after the drive bar 33 moves up and down.

The connecting means 36 for changing the movement of the driving bar 33 up and down by the rotation of the actuator movable terminal 20 is a separate connecting member axially coupled to one side of the movable terminal 20 (FIG. 3A). To a driving crank 38 coupled to the opposite side connected to the movable terminal 20 of FIG. 3D, and under the driving crank 38, the center portion of which is combined with a separate shaft to center the shaft. It consists of a driving wing (driving wing) 39 is installed to enable rotation.

The left end (based on the drawing) of the driving blade 39 and one side of the driving bar 33 are axially coupled to both ends of the first connecting rod 40, respectively, and the right side of the driving blade 39 is provided. A stage (based on the drawing) and one side of the driving crank 38 are axially coupled to both ends of the second connecting rod 41, respectively.

Accordingly, when the driving bar 33 moves downward, the driving blade 39 rotates counterclockwise about its axis and the driving crank 38 rotates clockwise about its axis.

Locking means (37) located below the drive bar (33) to prevent malfunction of the drive device (30) has a locking plate (43), one side of which is coupled to a separate shaft and rotates about that axis. ), And both ends of the locking plate 43, the third connecting rod 42 is axially coupled to the other side of the locking plate 43 and one side of the driving bar 33.

Therefore, the locking plate 43 rotates clockwise or counterclockwise according to the up / down movement of the driving bar 33.

In addition, the locking plate 43 is provided with an interlock plate 44 which rotates about an axis according to 'on / off' of a circuit breaker (not shown), and the locking plate 43 is rotated. Restrain or release the restraint.

Therefore, when the circuit breaker is in the 'on' state, the rotation of the locking plate 44 is constrained to prevent the driving bar 33 from moving downward.

Hereinafter, with reference to the accompanying drawings, a process of opening-ground the switch in the closed state by the drive device 30 of the switch configured as described above is as follows.

In the state in which the switch is closed as shown in FIG. 3A, the driving bar 33 of the driving device 30 is positioned above the movement displacement.

At this time, the circuit breaker is in the 'on' state and the interlock plate 44 restrains the locking plate 43 from rotating in the clockwise direction, so that the driving bar 33 and the third connecting rod 42 move downward. It cannot move and constrains the motion of all the components that make up the drive.

Therefore, rotation of the movable terminal 20 connected to the driving device 30 is also restrained, and the contact between the movable terminal 20 and the fixed terminal 13 is maintained even when an external shock or vibration occurs. .

When the circuit breaker changes to the 'off' state, as shown in FIG. 3B, the interlock plate 44 rotates counterclockwise to release the locking plate 43.

Therefore, when the first spindle shaft 31 rotates about an axis by driving a motor (not shown), the first guide nut 34 moves downward as shown in FIG. 3C.

At this time, since the position of the second guide nut 35 is fixed without the second spindle shaft 32 rotating, the driving bar 33 is inclined to the left side.

That is, the driving bar 33 is the same as rotating in the clockwise direction about the axis coupled to the second guide nut 35.

Accordingly, the first connecting rod 40 axially coupled to one side of the driving bar 33 also moves downward while the driving bar 33 is inclined, and is coupled to the other end of the first connecting rod 40. The driven blade 39 rotates in the counterclockwise direction.

As the driving blade 39 rotates in a counterclockwise direction, the second connecting rod 41 axially coupled to the other side thereof moves upward, and the driving crank 38 axially coupled with the other end of the second connecting rod 41. ) Rotates clockwise.

Therefore, the movable terminal 20 connected to the drive crank 38 is rotated counterclockwise to be located between the fixed terminal 13 and the ground terminal 14, and the switch is opened.

In addition, at the same time as the driving bar 33 is inclined, the third connecting rod 42 axially coupled to one side of the driving bar 33 also moves downward, and is axially coupled to the other end of the third connecting rod 42. Locking plate 43 rotates clockwise.

As such, when the opening and closing process of the switchgear is completed, the circuit breaker becomes 'on' again so that the interlock plate 44 rotates clockwise, and the rotation of the locking plate 43 is restrained again.

Therefore, the operation of the driving device 30 and the movable terminal 20 connected thereto is constrained, and the open state of the switch is continuously maintained even when an external shock or vibration occurs.

Meanwhile, in order to ground the switch, the circuit breaker is changed back to an 'off' state, and as shown in FIG. 3D, the interlock plate 44 rotates counterclockwise to restrain the locking plate 43. It is released again.

Then, the second spindle shaft 32 is rotated about the axis by the driving of a motor (not shown) so that the second guide nut 35 is moved downward so that the driving bar 33 is below the movement displacement. Will be located.

Accordingly, the first connecting rod 40 axially coupled to one side of the drive bar 33 moves downwards more than the open position at the same time as the driving bar 33 is lowered, and the first connecting rod ( Drive blade 39 coupled to the other end of the shaft 40 also rotates counterclockwise more than the open position.

As the driving blade 39 rotates in the counterclockwise direction, the second connecting rod 41 axially coupled to the other side also moves more upward than the open position, and the other end and the shaft of the second connecting rod 41 are rotated. The combined drive crank 38 also rotates clockwise more than the open position.

Therefore, the movable terminal 20 connected to the drive crank 38 rotates counterclockwise more than the open position to be in contact with the ground terminal 14, and the switch is grounded.

In addition, while the right side of the driving bar 33 moves downward, the third connecting rod 42 axially coupled to one side of the driving bar 33 also moves further down the open position, and the third The locking plate 43 axially coupled to the other end of the connecting rod 42 also rotates more clockwise than the open position.

As such, when the grounding process of the switchgear is completed, the circuit breaker is turned on again, but as shown, the interlock plate 44 does not restrain the rotation of the locking plate 43.

This is because all components of the switchgear in the grounded state are fixed in position by their own weight.

The present invention is not limited to the above embodiments and various changes and implementations can be made without departing from the spirit and scope of the invention.

For example, the length and shape of the driving bar connecting the first and second spindle shafts may be modified to connect the connecting rods to a desired position, thereby enabling the design of a safer driving device and the displacement of the movable terminal. It is possible to check the status of each contact by adjusting.

As described above, the present invention connects a driving device that operates according to 'on / off' of a circuit breaker to a movable terminal of a 3-position switch, and the movable terminal is opened and closed by operation of the drive device. -Make a rotation for grounding.

Therefore, there is an effect that the grounding operation is automatically performed as well as the opening-closing operation of the three-position switch.

In addition, since the driving device can be operated only in the 'off' state of the circuit breaker, the three-position switch has an effect that no accidental opening-closing-grounding action due to electromagnetic force, gravity, or vibration occurs.

Claims (5)

A first spindle shaft and a second spindle shaft which are vertically positioned and rotated about an axis by a motor and have threads formed on the circumference thereof; A first guide nut and a second guide nut mounted on the first and second spindle shafts and moving up and down when the first and second spindle shafts rotate; A drive bar having a left and a right end axially coupled to a side surface of the first and second guide nuts to move up and down within a predetermined movement displacement together with the first and second guide nuts; Located on the drive bar and connected to one side of the drive bar and connecting means for changing the up and down movement of the drive bar to the rotation of the switch operating terminal, Located under the drive bar is connected to one side of the drive bar drive device of the three-position switchgear consisting of a locking means for preventing the drive bar from moving down in the 'on' state of the circuit breaker. The method of claim 1, The connecting means and the drive crank axially coupled with a separate connecting member connected to one side of the three-position switch operating terminal, A drive blade positioned below the drive crank and installed to rotate around the axis by combining a central part with a separate axis, A first connecting rod having both ends axially coupled to one side of the driving blade and the driving bar; A driving device of a three-position switchgear, characterized in that both ends are made of a second connecting rod axially coupled to a side of the drive crank not connected to the first connecting rod and one side of the drive crank. The method of claim 1, The locking means is one side is coupled to a separate shaft and the locking plate rotates about the axis; A third connecting rod having both ends axially coupled with the other side of the locking plate and one side of the driving bar, respectively; The driving device of the three-position switchgear, characterized in that consisting of an interlock plate to rotate in accordance with the 'on / off' of the circuit breaker, and the rotation of the locking plate in the 'on' state of the circuit breaker. The method of claim 1, A bevel gear is installed at one end of the first spindle shaft and the second spindle shaft, and the driving apparatus of the 3-position switchgear is characterized by rotating the shaft with a zoom core. The method of claim 1, The driving bar moves up and down within a constant displacement, In order to be able to position the driving bar horizontally above and below the displacement, Driving device of the three-position switchgear, characterized in that the engaging piece is formed on the upper and lower movement displacement of the drive bar of the first spindle shaft and the second spindle shaft, respectively.