KR20010026169A - Contact point closing/open apparatus of combination-switch for distribution line - Google Patents

Abstract

PURPOSE: A contact making and breaking apparatus is provided to be capable of securing a constant operation speed regardless of an outer temperature variation and to be easy to install and repair. CONSTITUTION: An operation shift(1) is disposed along to an axis direction of a rotation shaft of a moving contact part and is connected to the rotation shaft so as to be rotated and moved. A front support plate(3) and a rear support plate(5) are disposed at both ends of the operation shift(1) so as to rotate and support the operation shift(1). A moving plate(7) is coupled so as to be rotated with regard to the operation shift(1). The first and second fixing plates(9,11) are coupled to the other end of the operation shift(1) so as to be rotated with the operation shift(1). A driving motor(13) provides a driving force for rotating and moving the moving plate(7). A transmission part(15) provides a driving power of the driving motor(13), with the transmission part(15) interposed between the driving motor(13) and the moving plate(7).

Description

Contact switch for combination switch for distribution line {CONTACT POINT CLOSING / OPEN APPARATUS OF COMBINATION-SWITCH FOR DISTRIBUTION LINE}

The present invention relates to a contact opening and closing device of a combination switch for a distribution line, and more particularly, a rotation shaft disposed to be rotatable between an input end and an output end, and formed to be rotatable integrally with the rotation axis. It relates to a contact opening and closing device of a combination switch for a distribution line that is connected to the rotary shaft of the combination switch for a distribution line installed in the distribution line having a contact portion to be electrically connected and separated from each other selectively.

In general, the high-voltage current generated and boosted at the power plant and transmitted to the primary substation is provided to the secondary substation or the customer through the distribution system formed in the ground or the process after the voltage drop in the primary substation. In the distribution system, a combination switch for a distribution line, called a ring main unit, is installed for the purpose of line separation, branching and protection of the primary side of the transformer. The combination switch for the distribution line is filled with an insulation medium in a sealed space so as to extinguish the arc generated during opening and closing of the line, and a arcing part arranged so that a fixed contact point and a movable contact point are disposed in the charging space of the insulation medium. And, one end is connected to the rotary shaft of the movable contact exposed to the outside has a contact opening and closing device to open and close the line by selectively rotating the rotary shaft.

FIG. 1 is a side view of a conventional switch opening and closing device of a combination switch for a distribution line, and FIGS. 2 to 4 are cross-sectional views taken along lines II-II, III-III and IV-IV of FIG. 1, respectively. As shown in these figures, the contact opening and closing device (hereinafter referred to as "contact opening and closing device") of the combination switch for the distribution line is coupled to extend along the axial direction at the exposed end of the rotating shaft (not shown), the movable contact. An operation shaft 101 for rotating the negative rotation shaft, a movable plate 103 coupled to one end of the operation shaft 101 so as to be freely rotatable, and disposed to face the movable plate 103 and operated by the operation shaft 101. First and second fixed plates 107 and 109 coupled to each other so as to be rotatable integrally, a cylinder mechanism 111 connected to the movable plate 103 to drive the movable plate 103 forward and backward, and the movable plate 103. Interlocking between the first fixing plate 107 to rotate the first and second fixing plates 107, 109 instantaneously by the elastic force accumulated during the rotation of the movable plate 103 to rotate the operation shaft 101 The spring member 115, the latch 117 for preventing the rotation of the first and second fixing plates (107, 109), and the movable plate 103 is disposed so as to be integrally rotatable, the predetermined angle of the movable plate 103 It has a latch release plate 121 which allows rotation of the 1st and 2nd fixed plates 107 and 109 by releasing the latch 117 at the time of rotation.

On both ends of the operation shaft 101, the front support plate 127 and the rear support plate are disposed to face each other so that the operation shaft 101 can be pivotally supported, and the movable plate having a substantially “Ｕ” shape on the front support plate 127 side. 103 is coupled. The upper side of the movable plate 103 is parallel to the operation shaft 101 so that the piston rod 113 of the cylinder mechanism 111 coupled to the upper end of the front support plate 127 and the rear support plate 129 can be coupled. The connection pin 105 is formed, and the other end of the connection pin 105 is coupled to the latch release plate 121 coupled to be rotatable integrally with the movable plate 103. The latch release plate 121 is provided with a working groove 123 having a guide surface 125 formed to have a smaller radius when it is rotated, and a spring member 115 between the movable plate 103 and the first fixing plate 107. ) Is combined. Both ends of the spring member 115 are horizontally extended downward in the axial direction of the operation shaft 101 and are disposed in front of both the rotational directions of the movable plate 103 and the first and second fixed plates 107 and 109.

The first and second fixing plates 107 and 109 are coupled to the inside of the rear support plate 129 so as to be integrally rotatable with the operation shaft 101. A pair of latches 117 are coupled between the first and second fixing plates 107 and 109 so as to be relatively rotatable with respect to the rotation axis arranged in parallel with the operation shaft 101. In the first and second fixing plates 107 and 109, a plurality of rotation stopping rollers 131 are disposed in an arc shape by contacting the latch 117 to prevent rotation of the first and second fixing plates 107 and 109. To the rotation axis of the rotation stopping roller 131, the separation preventing member 133 having an arc shape is coupled to prevent the separation of the rotating blocking roller 131. A latch pin 119 is formed in the free end region of the latch 117 in parallel with the operation shaft 101, and the free end region of the latch pin 119 has a working groove 123 formed in the latch release plate 121. It is arranged to correspond to the inlet area of the).

With this arrangement, when the fixed contact portion and the movable contact portion of the combination switch for distribution line are to be in contact with each other, first, the cylinder mechanism 111 is extended so that the piston rod 113 extends along the axial direction of the cylinder mechanism 111. Operate. When the cylinder mechanism 111 is driven in the extension direction, the movable plate 103 and the latch release plate 121 are rotated counterclockwise around the operation shaft 101. At this time, one end of the spring member 115 in contact with the movable plate 103 is rotated together with the movable plate 103, and the other end is in contact with the fixed plate rotated by the latch 117, the movable plate ( As the rotation of the 103 proceeds, an elastic force is accumulated in the spring member 115.

In the latch 117 rotated by the rotation stopping roller 131, the latch pin 119 gradually rotates from the inlet area of the working groove 123 as the latch release plate 121 rotates. In contact with the latch 117, the free end is rotated toward the operation shaft 101 side. Accordingly, the free end of the latch 117 in contact with the rotation stopping roller 131 is separated from the rotation stopping roller 131, and the spring member 115 having the elastic force accumulated therein moves the first and second fixing plates 107 and 109. Instantly rotate counterclockwise. As the first and second fixing plates 107 and 109 rotate by the elastic force of the spring member 115, the operation shaft 101 rotates together with the rotation shaft of the arc extinguishing portion so that the fixed contact portion and the movable contact portion contact each other.

On the other hand, the latch 117 is rotated in a direction spaced apart from the axis of the operation shaft 101 by the elastic force of the return spring (not shown) at the same time as being separated from the rotation stopping roller 131, and disposed in front of the rotation direction. The rotation blocking is performed by contacting the rotating blocking roller 131.

By the way, in the conventional switchgear of the combination switch for distribution lines, the cylinder mechanism 111 which allows the elastic force to accumulate in the spring member 115 is operated by hydraulic pressure, Due to the change in the viscosity of the oil due to the temperature change of the outside air, there is a problem that can not maintain a constant operating speed. In addition, as well as a large number of parts such as a regulator for maintaining the oil pressure and the piping for supply of oil uniformly, there is a problem that takes a lot of time and effort in their installation and maintenance.

Accordingly, it is an object of the present invention to provide a contact opening and closing device of a combination switch for a distribution line that can ensure a constant operating speed regardless of the change in outside temperature and is easy to install and maintain.

1 is a side view of a contact opening and closing device of a combination switch for a conventional distribution line,

2 to 4 are cross-sectional views taken along lines II-II, III-III and IV-IV of FIG. 1, respectively;

5 is an exploded perspective view of a contact opening and closing device of a combination switch for a distribution line according to an embodiment of the present invention;

Figure 6 is a side view of the coupled state of the contact opening and closing device of Figure 5,

7 is a cross-sectional view taken along the line VII-VII of FIG. 6;

8A to 8D are views for explaining the release operation of the latch according to the rotational state of the latch release plate of FIG. 6, respectively;

FIG. 9 is a view showing the state of the push rod after the movable plate rotates, corresponding to FIG. 7.

Explanation of symbols on the main parts of the drawings

1: operation shaft 7: movable plate

9,11: 1st and 2nd fixed plate 13: Drive motor

15: electric drive unit 17: operation disk member

18: operating hole 23: torsion coil spring member

25: latch release plate 29: guide surface

33: latch 37: latch pin

41: rotation stopping roller 47: reducer

51: input shaft 53: output shaft

55: push rod 56: guide slot

59: driving arm 61: driven arm

65: action pin

The object is, according to the present invention, a distribution line having a rotary shaft rotatably disposed between the input end and the output end, and a contact portion which is formed to be rotatable integrally with the rotary shaft so that the input end and the output end are electrically connected and separated from each other. A contact opening and closing device of a combination switch for a distribution line for selectively opening and closing the contact part by being connected to the rotating shaft of a combination switch for distribution line installed in a furnace to rotate the rotating shaft, wherein the rotating shaft is rotatable integrally with the rotating shaft. An operation shaft coupled to the rotation shaft to extend along an axial direction of the rotation shaft; A fixed plate coupled to one end of the operation shaft to be integrally rotatable with the operation shaft; A movable plate disposed on the other end of the operation shaft so as to be freely rotatable with respect to the operation shaft, the movable plate being opposed to the fixed plate; A torsion coil spring member disposed between the fixed plate and the movable plate and having both ends disposed in front of the fixed plate and the movable plate in a rotational direction; Latching means for suppressing rotation of the fixed plate when the movable plate is rotated; Latching release means for releasing the latching means so that the fixed plate can rotate; A drive motor for rotating the movable plate; And a transmission means interposed between the drive motor and the movable plate to provide a driving force of the drive motor to the movable plate.

Here, the drive motor is a rotation axis is disposed horizontally in the axial direction of the operation shaft; The transmission means includes a push rod having one end coupled to the movable plate so as to be relatively rotatable about a rotation shaft disposed parallel to the operation shaft, an input shaft connected to a rotation shaft of the driving motor, and parallel to the operation shaft. It is preferable to include a plurality of electric gears which are engaged with each other to have an output shaft disposed, and an action pin coupled to the other end of the push rod so as to move relative to the output shaft by the output shaft.

The transmission means rotates along a rotational plane disposed so as to be opposed to a rotational plane of the driven arm, with the driven arm provided to be rotatable about an axis formed on an extension line of the output shaft, and with the push rod interposed therebetween. And a driving arm coupled to the output shaft, wherein the actuating pin is formed in the free end region of the driven arm to be parallel to the output shaft, and the push rod has a slot in the slot so that the actuating pin can pass therethrough. It is formed, the drive arm is effective to press the action pin accommodated in the slot in the rear of the drive arm in the rotational direction.

And a reducer interposed between the drive motor and the input shafts of the plurality of electric gears to reduce the rotational speed of the drive motor at a predetermined speed ratio and provide the reduced speed to the plurality of electric gears. It is preferable to further include an operation disk member integrally coupled to the movable plate so as to be rotatable, and having an operation hole formed through the plate surface so as to manually rotate the movable plate.

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

5 is an exploded perspective view of a contact opening and closing device of a combination switch for a distribution line according to an embodiment of the present invention, and FIG. 6 is a side view of a coupled state of the contact opening and closing device of FIG. 5. As shown in these figures, the contact opening and closing device is provided with an operation shaft 1 which is disposed along the axial direction of the rotary shaft of the movable contact portion of the combination switch for distribution lines (not shown) so as to be integrally rotatable to one end of the rotary shaft. And a front support plate 3 and a rear support plate 5 disposed at both ends of the operation shaft 1 and rotatably supporting the operation shaft 1, and movable plates coupled to the operation shaft 1 so as to be freely rotatable. 7), first and second fixed plates 9 and 11 coupled to the other end of the operation shaft 1 so as to be integrally rotatable with the operation shaft 1, and a driving force for rotating the movable plate 7; It has a drive motor 13 for providing a, and the transmission unit 15 is provided between the drive motor 13 and the movable plate 7 to provide the driving force of the drive motor 13 to the movable plate (7).

The front support plate 3 is formed with a shaft hole 4 so that one end of the operation shaft 1 can be accommodated, and in the circumferential region of the shaft hole 4 so as to face each other with the shaft hole 4 interposed therebetween. A pair of arc-shaped action slots 6 are formed.

An operating disk member 17 is disposed between the front support plate 3 and the movable plate 7 so as to be integrally rotatable with the movable plate 7 and having a disc shape, and the operating disk member 17 acts. A pair of operation holes 18 are formed corresponding to the slots 6. The other side of the movable plate 7 has a cylindrical shape and is coupled to the connecting member 21 so as to be integrally rotatable. One end of each of the movable plates 7 is provided in the circumferential region of the movable plate 7. The arranged torsion coil spring member 23 is provided. Both ends of the torsion coil spring member 23 are laterally extended in the axial direction of the operation shaft 1 so that the lower edges of the movable plates 7 and the lower edges of the first and second fixing plates 9 and 11. Are arranged in front of both rotation directions of the.

At the other end of the connecting member 21, the latch release plate 25 is coupled to be integrally rotatable, and the latch release plate 25 has a guide surface gradually formed toward the axis of the operation shaft 1 along the rotation direction. A pair of working grooves 27 having 29 are formed. In the upper region of the latch release plate 25, one end is coupled to the upper end of the movable plate 7 and the other end of the connection pin 31 disposed in parallel with the operation shaft 1 is coupled.

A shaft hole (not shown) is formed in the rear support plate 5 to accommodate the operation shaft 1, and one side of the rear support plate 5 has first and second fixing plates 9 and 11 in the axial direction. They are arranged alongside each other. Each lower end of the first and second fixing plates 9 and 11 is bent to have a substantially "L" cross-sectional shape and extends along the axial direction of the operation shaft 1 to be below the lower end of the bending of the movable plate 7. Spring contact portions 10 and 12 are arranged.

A pair of latches 33 are coupled between the first and second fixing plates 9 and 11 so as to be freely rotatable about the rotation shaft 35 disposed substantially parallel to the operating shaft 1. have. A latch pin 37 is formed in the free end region of each latch 33 in parallel with the operation shaft 1, and the free end region of the latch pin 37 passes through the first fixing plate 9 to release the latch. It is located in the inlet area of the working groove 27 of 25. Each latch 33 is coupled with a return spring 39 for applying an elastic force so that each free end can be rotated in a direction away from the operation shaft 1.

The back support plate 5 is disposed along the circumferential direction in the circumferential direction of the first and second fixing plates 9 and 11 to be in contact with the latch 33, thereby rotating the first and second fixing plates 9 and 11. The support shafts 43 of the plurality of rotation stopping rollers 41 for interfering with each other are engaged by the nuts 44. A roller detachment preventing member 45 having an arc shape is coupled to a tip portion of each support shaft 43 arranged to have an arc shape.

On the other hand, in the upper region of the front support plate (3) and the rear support plate (5), the driving motor (13) having a rotational shaft arranged horizontally in the axial direction of the operation shaft (1), and the driving force of the driving motor (13) The transmission part 15 for providing to 7) is provided.

The transmission part 15 is an axial direction of the input shaft 51 and the operation shaft 1 arranged along the axial direction of the reduction gear 47 connected to the rotation shaft of the drive motor 13, and the rotation shaft of the drive motor 13. A gearbox 49 having a plurality of electric gears (not shown) having an output shaft 53 disposed in parallel with the gearbox and a pusher interposed between the output shaft 53 of the gearbox 49 and the movable plate 7. Has a rod 55.

The reducer 47 is coupled to the drive motor 13, and the input shaft 51 of the gearbox 49 is connected to the output side of the reducer 47 via a coupling 57. The drive arm 59 is rotatably coupled to the output shaft 53 of the gearbox 49 so as to extend in the radial direction.

On one side of the gearbox 49 along the axial direction of the operation shaft 1, a driven arm 61 having a rotational axis arranged in parallel with the operation shaft 1 is supported by the support member 63 to be rotatable. In the free end region of the driven arm 61, an action pin 65 protruding from the plate surface along the axial direction of the operation shaft 1 is formed. The actuating pin 65 is contact-pressured by the driving arm 59 so that the free end region guides the push rod 55 while pressing the push rod 55 while pivoting about the rotational axis of the driven arm 61. It passes through the slot 56 and is in contact with the side edge of the drive arm 59.

7 is a cross-sectional view taken along the line VII-VII of FIG. 6, and FIGS. 8A to 8D are diagrams for explaining the release operation of the latch according to the rotational state of the latch release plate of FIG. 6, and FIG. 9 is a view of the movable plate. It is a figure which shows the state of the push rod after rotation corresponding to FIG. As shown in these figures, in the state in which the distribution line is blocked, that is, in the state where the fixed contact portion and the movable contact portion are separated from each other, the action pin 65 is located in the upper region of the guide slot 56 of the push rod 55. One side edge of the driving arm 59 is in contact with the lower side of the working pin 65. At this time, the first and second fixing plates 9 and 11 have free ends of the latches 33 in contact with the rotation stopping rollers 41, respectively, and are rotated in both directions, and the latch release plate 25 Each latch pin 37 is located in the inlet region of the working groove 27.

On the other hand, when electrically connecting the input terminal and the output terminal of the distribution line, the controller (not shown) applies power to the drive motor 13. When power is applied to the drive motor 13, the rotational force of the drive motor 13 is decelerated at an appropriate speed ratio by the reducer 47, and is switched by the gearbox 49 connected to the output side of the reducer 47, thereby shifting the gearbox. The drive arm 59 coupled to the output shaft 53 of 49 is rotated counterclockwise. The driving arm 59 presses the action pin 65 disposed in the forward direction of the rotation direction, and the action pin 65 presses the push rod 55 upward. Then, the movable plate 7 and the latch release plate 25 are rotated counterclockwise about the operation shaft 1 by the connecting pin 31 coupled to the other end of the push rod 55.

As the latch release plate 25 rotates about the operation shaft 1, the latch pin 37 located at the inlet region of the working groove 27 is pressed toward the operation shaft 1 by the guide surface 29. It rotates in the direction spaced apart from the rotation stopping roller 41 about the coaxial 35. At this time, one end of the torsion coil spring member 23 is contacted and pressed to the bent lower edge of the movable plate 7 to rotate together with the movable plate 7, and the other end of the torsion coil spring is fixed to the first and second fixed portions. By rotating and restraining the spring contact portions 10 and 12 of the plates 9 and 11, the elastic force is accumulated in the torsion coil spring member 23.

As the rotation of the movable plate 7 is advanced, the latch pin 37 comes into contact with the inside of the actuating groove 27 of the latch release plate 25, whereby the latch 33 is disengaged from the rotation stopping roller 41. Will be. At the same time, the first and second fixed plates 9 and 11 are rotated counterclockwise along the rotational direction of the movable plate 7 together with the operation shaft 1. At this time, the latch 33 is disengaged from the rotation stopping roller 41 and rotates in a direction away from the operation shaft 1 by the elastic force of the return spring 39 at substantially the same time. The first and second fixed plates 9 and 11, which rotate by the elastic force of the torsion coil spring member 23, contact the free end of the latch 33 with another rotation stopping roller 41 disposed in the forward direction. The rotation is stopped by doing so.

The control unit drives the driving arm 59 to press the action pin 65 so that the action pin 65 can be located in the lower region of the guide slot 56 of the push rod 55 as shown in FIG. 9. The motor 13 is controlled.

When the input terminal and the output terminal of the combination switch for the distribution line are to be electrically disconnected, the controller applies power to the driving motor 13, as shown in FIG. 9, so that the driving arm 59 acts as a working pin 65. ) To pressurize the push rod 55 downward. The push rod 55 rotates the movable plate 7 and the latch release plate 25 counterclockwise, and the latch 33 disposed forward of the rotation direction is as described with reference to Figs. 8A to 8D. By the action, the first and second fixing plates 9 and 11 and the operation shaft 1 are rotated clockwise. Accordingly, the rotary shaft of the movable contact portion which is integrally rotatable to the operation shaft 1 rotates clockwise to separate the movable contact portion from the fixed contact portion.

On the other hand, when manually operating the contact opening and closing device, a rod-shaped operation protrusion (not shown) is inserted through the arc-shaped action slot 6 formed on the front support plate 3 so that the tip of the operation protrusion is the operating disk member 17. ) Is inserted into the operation hole 18. When the operating disk member 17 is rotated about a predetermined angle around the operating shaft 1, that is, the operating protrusion is in contact with the lower end or the upper end of the action slot 6, the operation disk member 17 is operated as described with reference to FIGS. 8A to 8D. By rotating the shaft 1 in the same direction as the rotational direction of the operating disk member 17, the rotating shaft of the movable contact portion connected to the operating shaft 1 can be rotated to a desired position.

As described above, according to the present invention, it is possible to secure a constant operating speed irrespective of the change in the installation place and the external air according to the seasonal change, and the combination switch for the distribution line that can reduce components such as hydraulic piping and regulators. Contact opening and closing device is provided. In addition, the contact opening and closing device of the combination switch for the distribution line according to the present invention does not need to replace the oil periodically and is easy to install and maintain.

Claims (5)

Combination switch for a distribution line installed in a distribution line having a rotary shaft rotatably disposed between an input end and an output end, and a contact portion which is formed to be rotatable integrally with the rotary shaft so that the input end and the output end are electrically connected and separated from each other. A contact opening and closing device of a combination switch for a distribution line for selectively opening and closing the contact portion by being connected to the rotating shaft of the rotating shaft, wherein the rotating shaft extends along the axial direction of the rotating shaft so as to be integrally rotatable with the rotating shaft. An operation shaft coupled to the; A fixed plate coupled to one end of the operation shaft to be integrally rotatable with the operation shaft; A movable plate disposed on the other end of the operation shaft so as to be freely rotatable with respect to the operation shaft, the movable plate being opposed to the fixed plate; A torsion coil spring member disposed between the fixed plate and the movable plate and having both ends disposed in front of the fixed plate and the movable plate in a rotational direction; Latching means for suppressing rotation of the fixed plate when the movable plate is rotated; Latching release means for releasing the latching means so that the fixed plate can rotate; A drive motor for rotating the movable plate; And a transmission means interposed between the drive motor and the movable plate to provide the driving force of the drive motor to the movable plate. The driving motor of claim 1, wherein the driving motor has a rotational axis disposed transversely in an axial direction of the operation shaft: The transmission means includes a push rod having one end coupled to the movable plate so as to be relatively rotatable about a rotation shaft disposed parallel to the operation shaft, an input shaft connected to a rotation shaft of the driving motor, and parallel to the operation shaft. A plurality of gears engaged with each other so as to have an output shaft disposed therein, and a coupling pin coupled to the other end of the push rod so as to move relative to the other end and pivoting about the output shaft by the output shaft; Contact opening device of switch. The rotation means according to claim 2, wherein the transmission means is disposed so as to be rotatable about an axis formed on an extension line of the output shaft, and to be opposed to a rotational plane of the driven arm with the push rod interposed therebetween. Further comprising a drive arm coupled to the output shaft rotatably along a plane, The working pin is formed in the free end region of the driven arm to be parallel to the output shaft, the push rod is formed with a slot in the long hole through which the working pin can pass, the driving arm is in the direction of rotation A contact opening and closing device of a combination switch for a distribution line, characterized in that to press the action pin accommodated in the slot from the rear of the drive arm. The method of claim 1, further comprising a speed reducer interposed between the drive motor and the input shaft of the plurality of electric gears to reduce the rotational speed of the drive motor at a predetermined speed ratio to provide the plurality of electric gears. Contact switchgear of a combination switch for a distribution line. The operating disk according to any one of claims 1 to 4, wherein the operating disk is integrally coupled to the movable plate so as to be freely rotatable with respect to the operating shaft, and has an operation hole formed therethrough through a plate so as to manually rotate the movable plate. Contact opening and closing device of the combination switch for the distribution line further comprising a member.