CN114008732A

CN114008732A - Operating device for switchgear

Info

Publication number: CN114008732A
Application number: CN201980097976.6A
Authority: CN
Inventors: 色见晃辅; 清水正治; 丸岛敬; 网田芳明
Original assignee: Toshiba Corp; Toshiba Energy Systems and Solutions Corp
Current assignee: Toshiba Corp; Toshiba Energy Systems and Solutions Corp
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2022-02-01
Also published as: JP7176116B2; WO2021001901A1; JPWO2021001901A1

Abstract

The operating device for a switchgear of an embodiment has a pair of compression springs, a compression spring support mechanism, and at least one guided portion. A pair of compression springs are arranged in parallel. The compression spring support mechanism includes a first support member and a spring housing portion. The first support member supports the first end portions of the pair of compression springs together as a movable end. At least one guide groove extending in the extending and contracting direction of the pair of compression springs is formed in the spring housing portion. At least one of the guided portions has a first contact member and a second contact member. The first contact member and the second contact member are supported by the first support member. The first contact member and the second contact member are arranged in at least one guide groove along the expansion/contraction direction of the pair of compression springs. The first contact member and the second contact member can contact with an edge of at least one guide groove.

Description

Operating device for switchgear

Technical Field

Embodiments of the present invention relate to an operating device for a switchgear.

Background

Generally, a switchgear of high voltage specification such as a gas circuit breaker and a switchgear operating device for switching the switchgear are installed in a power station, a substation, and an exchange station. In recent years, a spring operation mechanism is mainly used as a switch operation device. The spring-operated mechanism is required to move the movable electrode, which can be brought into contact with the fixed electrode of the switching device, at high speed between an off position, which is an open position, and an on position, which is a closed position. The on-time required to make the switchgear change from the off-state to the on-state and the off-time required to make the switchgear change from the on-state to the off-state are specified by specification for each switchgear.

In some cases, a pair of compression springs arranged in parallel is used as a power source for moving the movable electrode from the off position to the on position. In this case, the pair of compression springs are rotatably in contact with the single support member, and are compressed simultaneously by the energy storage motor or the like via the support member, thereby obtaining the urging force.

However, if at least one of the pair of compression springs is contracted in a buckled state or a rotated state from a predetermined position, there is a possibility that a time required for releasing the spring force (elastic energy) between the pair of compression springs varies. For example, when the compression spring is buckled, the compression spring comes into contact with a member around the compression spring, and the compression spring may not be smoothly restored (stretched). Then, the on operation becomes unstable, and the closing time may not be within the specification.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2012-43733

Patent document 2: japanese patent laid-open publication No. 2017-91830

Disclosure of Invention

Technical problem to be solved by the invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an operating device for a switchgear capable of performing a smooth on operation.

Means for solving the problems

The operating device for a switchgear of an embodiment has a pair of compression springs, a compression spring support mechanism, and at least one guided portion. A pair of compression springs generate forces that move a movable electrode of the switching device between an on position in contact with a fixed electrode of the switching device and an off position separated from the fixed electrode to the on position. The pair of compression springs are arranged in parallel in a predetermined direction. The compression spring support mechanism includes a first support member, a second support member, and a spring housing portion. The first support member supports the first end portions of the pair of compression springs together as a movable end. The second support member supports the second end portions of the pair of compression springs as fixed ends. At least one guide groove extending in the extending and contracting direction of the pair of compression springs is formed in the spring housing portion. At least one of the guided portions has a first contact member and a second contact member. The first contact member and the second contact member are supported by the first support member. The first contact member and the second contact member are arranged in at least one guide groove along the expansion/contraction direction of the pair of compression springs. The first contact member and the second contact member can contact with an edge of at least one guide groove.

Drawings

Fig. 1 is a front view showing an operation device for a switchgear according to a first embodiment.

Fig. 2 is a sectional view taken along line II-II of fig. 1.

Fig. 3 is a bottom view showing a pair of engaging springs of the first embodiment.

Fig. 4 is a sectional view taken along line IV-IV of fig. 2.

Fig. 5 is a perspective view showing the closing spring portion of the first embodiment.

Fig. 6 is a perspective view showing a guided portion according to the first embodiment.

Fig. 7 is a sectional view taken along line VII-VII of fig. 2.

Fig. 8 is a front view showing the vicinity of the upper end of the on spring according to the first embodiment.

Fig. 9 is a front view showing the vicinity of the upper end of the on spring according to the second embodiment.

Fig. 10 is a front view showing the vicinity of the lower end portion of the closing spring according to the second embodiment.

Detailed Description

Hereinafter, an operation device for a switchgear according to an embodiment will be described with reference to the drawings. In the following description, the same reference numerals are given to the same or similar structures having the same or similar functions. Moreover, a repetitive description of these structures may be omitted.

(first embodiment)

As shown in fig. 1, the switchgear operating device 1 is an operating device for performing a switching operation on a switchgear 100 such as a gas circuit breaker. The switching device 100 includes a fixed electrode 101 and a movable electrode 102 contactable with the fixed electrode 101. The switchgear operating device 1 moves the movable electrode 102 between an off position where the movable electrode 102 is separated from the fixed electrode 101 and the switchgear 100 is opened, and an on position where the movable electrode 102 is in contact with the fixed electrode 101 and the switchgear 100 is closed. The switchgear operation device 1 includes a frame 2, a disconnecting spring 3, a disconnecting link mechanism 4, a connecting spring 5, a connecting link mechanism 6, an energy accumulating mechanism 7 (see fig. 2), and a drive lever 8.

The frame 2 is provided as a housing of the switchgear operation device 1. The breaking spring portion 3 generates an urging force for moving the movable electrode 102 of the switching device 100 from the on position to the off position. The disconnecting link mechanism 4 connects the disconnecting spring portion 3 and the drive lever 8. The closing spring portion 5 generates an urging force that moves the movable electrode 102 of the switching device 100 from the off position to the on position. The closing link mechanism 6 connects the closing spring portion 5 and the drive lever 8. The energy storage mechanism 7 (see fig. 2) stores the spring force (elastic energy) of the through spring portion 5. The drive lever 8 connects the movable electrode 102 to the disconnecting link mechanism 4 and the connecting link mechanism 6.

For convenience of explanation, the + X direction, the-X direction, + Y direction, the-Y direction, + Z direction, and the-Z direction are defined herein. the-X direction is the opposite direction to the + X direction. In the case where the + X direction and the-X direction are not distinguished, they are simply referred to as "X direction". The + Y direction and the-Y direction are directions orthogonal to the X direction. the-Y direction is the opposite direction to the + Y direction. In the case where the + Y direction and the-Y direction are not distinguished, they are simply referred to as "Y direction". The + Z direction and the-Z direction are directions orthogonal to the X direction and the Y direction. the-Z direction is the opposite direction to the + Z direction. In the case where the + Z direction and the-Z direction are not distinguished, they are simply referred to as "Z direction". In the present embodiment, the Z direction is a vertical direction, and the X direction and the Y direction are horizontal directions. In the present embodiment, the + Z direction is vertically upward, and the-Z direction is vertically downward.

The frame 2 houses main parts of the disconnecting link mechanism 4 and the connecting link mechanism 6. The frame 2 supports the breaking spring portion 3 and the closing spring portion 5 from below. The frame 2 is fixed to a case or the like of the switchgear 100.

The breaking spring 3 is disposed in the + Z direction of the frame 2. The breaking spring unit 3 mainly includes a breaking spring 11 which is a compression coil spring. The breaking spring 11 is disposed so that the expansion and contraction direction coincides with the Z direction. The lower end of the disconnection spring 11 is supported as a fixed end by the frame 2. The upper end of the breaking spring 11 is provided as a movable end.

The disconnecting link mechanism 4 includes a disconnecting spring lever 21 and a main lever 22. The breaking spring rod 21 is inserted inside the breaking spring 11. The first end of the trip spring lever 21 is connected to the upper end of the trip spring 11. The second end of the trip spring lever 21 is coupled to the main lever 22. The main lever 22 is rotatably supported by the frame 2. A drive lever 8 is directly or indirectly connected to the main lever 22. The drive lever 8 will be described later.

The trip spring lever 21 is displaced in the Z direction in conjunction with expansion and contraction of the trip spring 11. Specifically, the trip spring lever 21 is displaced in the + Z direction when the trip spring 11 is expanded, and is displaced in the-Z direction when the trip spring 11 is contracted. The main lever 22 rotates in the arrow a1 direction and the arrow a2 direction in conjunction with the Z-direction displacement of the trip spring lever 21. Specifically, the main lever 22 rotates in the arrow a1 direction when the opening spring lever 21 is displaced in the + Z direction, and rotates in the arrow a2 direction when the opening spring lever 21 is displaced in the-Z direction.

Fig. 2 is a sectional view taken along line II-II of fig. 1.

As shown in fig. 2, the closing spring portion 5 is disposed in the + Z direction of the frame 2. The closing spring unit 5 includes a pair of closing springs 31 (compression springs), a closing spring support mechanism 40 (compression spring support mechanism), and a pair of guided portions 70.

As shown in fig. 2 and 3, the pair of closing springs 31 are compression coil springs. The pair of closing springs 31 have the same specification. Specifically, the number of turns, the natural length, the coil inner and outer diameters, the winding direction, and the spring constant of the pair of closing springs 31 are equal to each other. The closing springs 31 are arranged so that the expansion and contraction directions coincide with the Z direction. The pair of closing springs 31 are arranged in parallel in the X direction. Specifically, the pair of closing springs 31 are disposed such that their central axes are parallel to each other and their respective both end portions overlap when viewed from the X direction. The pair of closing springs 31 are disposed line-symmetrically with respect to a virtual line parallel to the central axis thereof. The lower end portions of the pair of on springs 31 are set as fixed ends. The upper end portions of the pair of on springs 31 are provided as movable ends.

Support surfaces 32 are formed on both ends of the closing spring 31, and are perpendicular to the expansion and contraction direction. The support surface 32 is a smooth surface formed by grinding the wire material forming the energizing spring 31. The closing spring 31 may be a closed-end coil spring or a free-end (open end) coil spring.

As shown in fig. 2, the closing spring support mechanism 40 includes an upper support member 41 (first support member), a lower support member 51 (second support member), and a spring housing portion 61.

The upper support member 41 supports the upper ends of the pair of closing springs 31 together. The upper support member 41 includes an upper support plate 42, a pair of upper positioning spacers 43, a pair of upper guide spacers 44, and a shaft 45.

The upper support plate 42 is disposed in the + Z direction of the pair of closing springs 31. The upper support plate 42 is formed in a flat plate shape with the front and back surfaces thereof facing in the Z direction. The upper support plate 42 is formed in a rectangular shape having the X direction as the longitudinal direction when viewed from the Z direction. The upper support plate 42 overlaps the entirety of the pair of on springs 31 when viewed in the Z direction.

The pair of upper positioning spacers 43 is provided at 1 position for each of the closing springs 31. The pair of upper positioning spacers 43 have substantially the same structure as each other. The upper positioning spacers 43 protrude from the upper support plate 42 toward the closing spring 31 side (-Z direction). The upper positioning spacer 43 is inserted inside the upper end of the closing spring 31. The upper positioning spacer 43 is formed in a cylindrical shape coaxial with the closing spring 31. The outer diameter of the upper positioning spacer 43 is slightly smaller than the inner diameter of the on spring 31. The upper positioning spacer 43 positions the upper end portion of the closing spring 31 in the radial direction by bringing the outer peripheral surface into contact with the closing spring 31 from the inside. The upper positioning spacer 43 may be formed in a cylindrical shape.

The pair of upper guide spacers 44 is provided at 1 position with respect to each of the closing springs 31. The pair of upper guide spacers 44 have substantially the same structure as each other. The upper guide spacer 44 is disposed on the side of the upper support plate 42 closer to the engaging spring 31. The upper guide spacer 44 is interposed between the closing spring 31 and the upper support plate 42. The upper guide spacer 44 is formed in a flat plate shape with the front and back surfaces thereof facing in the Z direction. The entire upper guide spacer 44 overlaps the upper support plate 42 when viewed in the Z direction.

The upper guide spacer 44 has a through hole 44 a. The upper positioning spacer 43 is inserted through the through hole 44a of the upper guide spacer 44. The through hole 44a is formed in a shape corresponding to the outer shape of the upper positioning spacer 43. Specifically, the through hole 44a is formed in a circular shape coaxial with the upper positioning spacer 43 and having an inner diameter substantially equal to the outer diameter of the upper positioning spacer 43. The upper surface of the upper guide spacer 44 is opposed to the lower surface of the upper support plate 42. The upper guide spacer 44 is fixed to the upper support plate 42. For example, an upper guide spacer 44 is fastened to the upper support plate 42. The lower surface of the upper guide spacer 44 is in surface contact with the support surface 32 of the upper end of the contact spring 31.

The shaft 45 is disposed in the + Z direction of the upper support plate 42. The shaft 45 is formed in a cylindrical shape and extends in the X direction. The shaft 45, the pair of closing springs 31, and the upper support plate 42 protrude to both sides in the X direction. The shaft 45 is disposed such that the center axis thereof intersects with the center axes of the pair of engaging springs 31. The shaft 45 is fixed to the upper support plate 42. For example, the shaft 45 is welded to the upper surface of the upper support plate 42.

The lower support member 51 supports the lower ends of the pair of closing springs 31 as fixed ends. The lower support member 51 includes a pair of lower positioning spacers 52 and a pair of lower guide spacers 53.

The pair of lower positioning spacers 52 is provided at 1 position for each of the closing springs 31. The pair of lower positioning spacers 52 have substantially the same structure as each other. The lower positioning spacer 52 protrudes from the upper surface of the frame 2 toward the closing spring 31 side (+ Z direction). The lower positioning spacer 52 is inserted inside the lower end portion of the on spring 31. The lower positioning spacer 52 is formed in a cylindrical shape coaxial with the contact spring 31. The outer diameter of the lower positioning spacer 52 is slightly smaller than the inner diameter of the switch-on spring 31. The lower positioning spacer 52 positions the lower end portion of the closing spring 31 in the radial direction by bringing the outer peripheral surface into contact with the closing spring 31 from the inside. The lower positioning spacer 52 may be formed in a cylindrical shape.

The pair of lower guide spacers 53 is provided at 1 for each of the closing springs 31. The pair of lower guide spacers 53 have substantially the same structure as each other. The lower guide spacer 53 is disposed on the closing spring 31 side of the frame 2. The lower guide spacer 53 is interposed between the closing spring 31 and the frame 2. The lower guide spacer 53 is formed in a flat plate shape with the front and back surfaces thereof facing in the Z direction.

The lower guide spacer 53 has a through hole 53 a. The lower positioning spacer 52 is inserted into the through hole 53a of the lower guide spacer 53. The through hole 53a is formed in a shape corresponding to the outer shape of the lower positioning spacer 52. Specifically, the through hole 53a is formed in a circular shape coaxial with the lower positioning spacer 52 and having an inner diameter substantially equal to the outer diameter of the lower positioning spacer 52. The lower surface of the lower guide spacer 53 faces the upper surface of the frame 2. For example, the lower guide spacer 53 is directly mounted on the frame 2. The upper surface of the lower guide spacer 53 is in surface contact with the support surface 32 of the lower end portion of the contact spring 31.

Fig. 4 is a sectional view taken along line IV-IV of fig. 2.

As shown in fig. 4, the outer edge of the lower guide spacer 53 includes an arc portion 54 and a protrusion 55 that protrudes radially outward from the arc portion 54. The circular arc portion 54 extends centering on the center axis of the lower positioning spacer 52. The arc portion 54 extends over an angular range of 180 ° or more. The protruding portion 55 is connected to both ends of the circular arc portion 54. The protruding portion 55 protrudes in the X direction. Specifically, the protruding portion 55 protrudes in a direction in which the pair of lower guide spacers 53 are separated from each other. The protruding portion 55 is formed in a rectangular shape.

As shown in fig. 5, the spring receiving portion 61 receives the pair of closing springs 31. The spring housing 61 includes a pair of guide walls 62. The pair of guide walls 62 are disposed so as to sandwich the pair of on springs 31 in the X direction. The pair of guide walls 62 are formed to be plane-symmetrical with each other with respect to the virtual YZ plane. Each guide wall 62 stands on the upper surface of the frame 2. Each guide wall 62 is fixed to the frame 2. For example, each guide wall 62 is welded to the frame 2.

The guide wall 62 includes a main wall 63 and a pair of side walls 64 extending from the main wall 63. The main wall 63 is formed in a flat plate shape with the front and back surfaces facing in the X direction. The main wall portion 63 extends from the upper surface of the frame 2 in the + Z direction with a constant width when viewed from the X direction. The pair of side walls 64 extend from both side edges of the main wall 63 in the Y direction toward the pair of closing springs 31. The pair of side wall portions 64 extend from the entirety of both side edges of the main wall portion 63. The pair of side wall portions 64 extend orthogonally to the main wall portion 63.

The guide wall 62 is disposed so as to surround an end portion of the upper support plate 42 in the X direction. The main wall portion 63 faces the entire short side of the upper support plate 42 when viewed in the Z direction. The pair of side walls 64 face the long-side end portions of the upper support plate 42 when viewed in the Z direction. The guide wall 62 allows Z-directional movement of the upper support plate 42 and restricts X-directional and Y-directional movement. The lower end of the guide wall 62 is disposed so as to surround the protruding portion 55 on the outer edge of the lower guide spacer 53 (see also fig. 4). The guide wall 62 restricts rotation of the lower guide spacer 53 by the protrusion 55 locked to the outer edge of the lower guide spacer 53.

A guide groove 65 extending in the Z direction is formed in the main wall 63. The guide groove 65 extends with a constant width when viewed from the X direction. That is, the edges 66 on both sides of the guide groove 65 in the Y direction extend linearly in parallel with each other. The pair of edges 66 of the guide groove 65 extend at equal intervals from each other in the Y direction with respect to the center axis of the pair of on springs 31 when viewed from the X direction. The pair of edges 66 of the guide groove 65 overlap each other when viewed from the Y direction. The guide groove 65 opens in the + Z direction at the upper end edge of the main wall 63. The shaft 45 of the upper support member 41 is inserted into the guide groove 65.

The pair of guided portions 70 is provided at 1 position with respect to each of the guide grooves 65 of the pair of guide walls 62. The pair of guided portions 70 have substantially the same structure as each other. The guided portion 70 is disposed at a position that is not displaceable relative to the upper support member 41. The guided portion 70 includes a lower roller 71 (first contact member) and an upper roller 72 (second contact member) arranged in the guide groove 65 in a Z direction.

The lower roller 71 is provided so as to be displaceable in the Z direction in the guide groove 65. The lower roller 71 is rotatably supported by an end of the shaft 45. The lower roller 71 is mounted to the shaft 45 via a bearing. The lower roller 71 is provided to be rotatable about an axis extending in the X direction. The lower roller 71 can roll or slide on the edge 66 of the guide groove 65. The lower roller 71 contacts in the Y direction with respect to the edge 66 of the guide groove 65.

As shown in fig. 5 and 6, a constricted portion 73 is formed on the outer peripheral surface of the lower roller 71. The contraction portion 73 extends over the entire circumference of the lower roller 71. The outer diameter of the bottom of the constricted portion 73 is formed smaller than the width of the guide groove 65. The edges 66 of the guide groove 65 enter the inside of the constricted portion 73 from both sides in the Y direction. Thereby, the lower roller 71 is formed so as to be lockable in the X direction with respect to the edge 66 of the guide groove 65. In addition, the following may be formed: the outer diameter of the bottom of the constricted portion 73 coincides with the width of the guide groove 65, and the lower roller 71 is always in contact with the pair of edges 66 of the guide groove 65.

As shown in fig. 5, the upper roller 72 is provided so as to be displaceable in the Z direction within the guide groove 65. The upper roller 72 is disposed above the lower roller 71. For example, the upper roller 72 is disposed at a distance smaller than the radius of the lower roller 71 from the lower roller 71. The upper roller 72 is rotatably supported by the shaft 45 via a bracket 74. The upper roller 72 is mounted to the bracket 74 via a bearing. The bracket 74 is fixed to the upper portion of the shaft 45. For example, the bracket 74 is detachably fastened to the shaft 45. The upper roller 72 is provided to be rotatable about an axis extending in the X direction. The upper roller 72 can roll or slide on the edge 66 of the guide groove 65. The upper roller 72 contacts in the Y direction with respect to the edge 66 of the guide groove 65.

As shown in fig. 5 and 6, the upper roller 72 is formed in the same manner as the lower roller 71. That is, the outer diameter of the bottom of the constricted portion 73 of the upper roller 72 matches the outer diameter of the constricted portion 73 of the lower roller 71. The upper roller 72 is formed so as to be lockable in the X direction with respect to the edge 66 of the guide groove 65, similarly to the lower roller 71.

Fig. 7 is a sectional view taken along line VII-VII of fig. 2.

As shown in fig. 4 and 7, the closing spring portion 5 further includes a rotation restricting structure 80. The rotation restriction structure 80 includes: an upper rotation restricting structure 81 that restricts rotation of the upper support member 41 in the winding direction of the on spring 31; and a lower rotation restricting structure 82 that restricts rotation of the lower support member 51 in the winding direction of the on spring 31. The term "winding direction of the spring" used in the present embodiment is two directions around the central axis of the spring.

As shown in fig. 7, the upper rotation restricting structure 81 includes a pair of upper pins 83 (first and second convex portions) protruding from the upper support member 41 toward the closing spring 31. The pair of upper pins 83 is provided at 1 position with respect to each of the closing springs 31. The pair of upper pins 83 have substantially the same structure as each other. The upper pin 83 protrudes in the-Z direction from the lower surface of the upper guide spacer 44. For example, the upper pin 83 is provided as a member separate from the upper guide spacer 44, and is pressed into the upper guide spacer 44. The upper pin 83 is formed in a cylindrical shape. For example, the height of the upper pin 83 is not more than half of the outer diameter of the wire of the closing spring 31. The upper pin 83 is disposed at a position overlapping the wire material of the closing spring 31 when viewed from the Z direction. The upper pin 83 can contact the end 33 of the wire of the switch-on spring 31. The upper pin 83 is in contact with the end 33 of the wire of the closing spring 31 to restrict rotation of the closing spring 31 in the winding direction.

As shown in fig. 4, the lower rotation restricting structure 82 includes a pair of lower pins 84 (a first convex portion and a second convex portion) protruding from the lower support member 51 toward the on spring 31. The pair of lower pins 84 is provided at 1 position with respect to each of the engaging springs 31. The pair of lower pins 84 have substantially the same structure as each other. The lower pin 84 protrudes from the upper surface of the lower guide spacer 53 in the + Z direction. For example, the lower pin 84 is provided as a member separate from the lower guide spacer 53, and is press-fitted into the lower guide spacer 53. The lower pin 84 is formed in a cylindrical shape. For example, the height of the lower pin 84 is not more than half the outer diameter of the wire of the closing spring 31. The lower pin 84 is disposed at a position overlapping the wire of the closing spring 31 when viewed from the Z direction. The lower pin 84 can be in contact with the end 33 of the wire of the switch-on spring 31. The lower pin 84 restricts rotation of the switch-on spring 31 in the winding direction by contacting the end 33 of the wire of the switch-on spring 31.

As shown in fig. 1 and 2, the closing link mechanism 6 includes a pair of closing links 91, a pair of closing levers 92, a cam shaft 93, and a closing cam 94. The pair of on links 91 is provided in 1 for each end of the shaft 45 of the upper support member 41. The pair of connecting links 91 have substantially the same structure. For example, the connecting link 91 is disposed outside the frame 2 and the spring receiving portion 61. A first end of the on link 91 is connected to an end of the shaft 45. The second end of the switch link 91 is coupled to the switch lever 92. The pair of on levers 92 is provided at 1 position for each on link 91. The pair of on levers 92 have substantially the same structure as each other. For example, the on lever 92 is disposed outside the frame 2 and the spring receiving portion 61. The pair of on levers 92 are fixedly supported at both ends of the cam shaft 93. The camshaft 93 is rotatably supported by the frame 2 via a bearing or the like. An engaging cam 94 is fixed to an intermediate portion of the cam shaft 93. The drive lever 8 is coupled to the switch-on cam 94.

As shown in fig. 1, the first end of the on link 91 moves up and down in conjunction with the Z-direction displacement of the upper support member 41. Specifically, the first end of the closing link 91 is displaced in the + Z direction when the upper support member 41 is displaced in the + Z direction in accordance with the extension of the pair of closing springs 31, and is displaced in the-Z direction when the upper support member 41 is displaced in the-Z direction in accordance with the contraction of the pair of closing springs 31. The switch lever 92 rotates in the arrow B1 direction and the arrow B2 direction in conjunction with the Z-direction displacement of the first end of the switch link 91. Specifically, the on lever 92 rotates in the direction of arrow B1 when the first end of the on link 91 is displaced in the + Z direction, and rotates in the direction of arrow B2 when the first end of the on link 91 is displaced in the-Z direction. The on cam 94 rotates in the same direction as the on lever 92 in conjunction with the rotation of the on lever 92.

The drive lever 8 is coupled to the movable electrode 102 at a first end portion, and coupled to the main lever 22 and the on cam 94 at a second end portion side with respect to the first end portion. The drive lever 8 is always coupled to the main lever 22 and is detachably coupled to the switch cam 94. When the main lever 22 is rotated in the direction of arrow a1, the drive lever 8 moves the movable electrode 102 from the on position to the off position. At this time, the coupling of the drive lever 8 and the on cam 94 is released, and the on cam 94 does not rotate. When the on cam 94 rotates in the direction of arrow B1, the drive lever 8 moves the movable electrode 102 from the off position to the on position. At this time, the drive lever 8 rotates the main lever 22 in the arrow a2 direction, and the elastic force of the disconnecting spring 11 is stored.

As shown in fig. 2, the energy storage mechanism 7 is a drive source that stores the spring force of the pair of engaging springs 31. The energy storage mechanism 7 includes, for example, a motor, a chain, and the like. The energy storage mechanism 7 is directly or indirectly connected to a camshaft 93 of the connecting link mechanism 6. The energy storage mechanism 7 rotates the camshaft 93 in a direction to rotate the on lever 92 in a direction of an arrow B2 (see fig. 1) based on a command from the switchgear 100 or the like. The energy storage mechanism 7 compresses the pair of opening springs 31 via the opening link 91 and the upper support member 41 by rotating the opening lever 92 in the direction of arrow B2, thereby storing the spring force of the pair of opening springs 31.

Although not shown, a disconnecting lock mechanism for locking the disconnecting spring 11 in a contracted state is connected to the disconnecting spring portion 3 or the disconnecting link mechanism 4. Further, a lock mechanism for closing, which locks the pair of closing springs 31 in a contracted state, is connected to the closing spring portion 5 or the closing link mechanism 6. The lock mechanism for disconnection and the lock mechanism for connection include, for example, a solenoid, and the lock is released based on a command from the switchgear 100 or the like.

The operation of the switchgear operation device 1 according to the present embodiment will be described.

The disconnection operation will be described. When a disconnection command is issued from the switchgear 100 in the on state of the switchgear operation device 1, the disconnection lock mechanism is unlocked. Accordingly, the spring force of the charged disconnecting spring 11 is released and transmitted to the movable electrode 102 via the disconnecting link mechanism 4 and the drive lever 8. Thereby, the movable electrode 102 moves to the open position, and the switchgear 100 becomes the off state.

The energy storage operation by the spring force of the closing spring 31 after the opening operation will be described. When the above-described disconnecting operation is completed, the energy accumulation mechanism 7 is driven to accumulate the spring force of the pair of closing springs 31 via the closing link mechanism 6. Specifically, the first end portions of the pair of closing links 91 are displaced downward, so that the upper support member 41 of the closing spring support mechanism 40 is moved downward in parallel, and the pair of closing springs 31 are compressed at the same time. Thereby, the switchgear operation device 1 is in the open state. During the charging operation of the spring force of the close spring 31, the connection between the drive lever 8 and the close lever 92 is released, and the drive lever 8, the disconnecting link mechanism 4, and the disconnecting spring 11 do not operate.

The connection operation will be described. When an on command is issued from the switchgear 100 in the off state of the switchgear operating device 1, the lock mechanism for on is unlocked. Accordingly, the spring force of the pair of energized springs 31 is released and transmitted to the movable electrode 102 via the connecting link mechanism 6 and the drive lever 8. Thereby, the movable electrode 102 moves to the on position, and the switching device 100 becomes the closed state. The spring force of the released pair of on springs 31 is transmitted to the off link mechanism 4 via the on link mechanism 6 and the drive lever 8. This charges the spring force of the breaking spring 11.

The operation and effects of the switchgear operation device 1 according to the present embodiment will be described.

In the present embodiment, both the lower roller 71 and the upper roller 72 of the guided portion 70 supported by the upper support member 41 can contact the edge 66 of the guide groove 65. With this configuration, the lower roller 71 and the upper roller 72 are always aligned in the extending direction (i.e., the Z direction) of the guide groove 65. This can suppress the inclination of the upper support member 41 during the compression of the pair of closing springs 31 during the charging operation of the spring force of the closing springs 31. Therefore, the pair of on springs 31 are uniformly contracted without buckling, and hence the time required for releasing the spring force between the pair of on springs 31 becomes uniform. Therefore, the switchgear operation device 1 capable of performing a smooth on operation can be provided. Further, the closing spring 31 is buckled to repeatedly contact the spring receiving portion 61, and thus, the breakage of the closing spring 31 can be suppressed.

The lower roller 71 and the upper roller 72 can roll or slide on the edge 66 of the guide groove 65. According to this structure, the guided portion 70 is in contact with the edge 66 of the guide groove 65 at 2 points in the Z direction. Therefore, the sliding resistance between the guided portion 70 and the edge 66 of the guide groove 65 can be reduced compared to a structure in which the contact portion between the guided portion and the edge of the guide groove extends in the Z direction. Therefore, the guided portion 70 can be smoothly displaced with respect to the spring receiving portion 61, and therefore, the displacement of the pair of on springs 31 when the spring force is released can be stabilized. Therefore, the on operation of the switchgear operation device 1 can be stabilized.

In addition, the pair of guide grooves 65 are provided on both sides in the X direction with respect to the closing spring 31. The guided portions 70 are provided at 1 position with respect to each guide groove 65. According to this configuration, the force of buckling of each of the pair of closing springs 31 can be uniformly received by the pair of guided portions 70. Therefore, buckling of the pair of closing springs 31 can be more reliably suppressed.

In addition, the lower roller 71 and the upper roller 72 are in contact in the Y direction with respect to the edge 66 of the guide groove 65. With this configuration, displacement of the upper roller 72 in the Y direction relative to the lower roller 71 can be suppressed. Therefore, the inclination of the upper support member 41 when viewed from the X direction can be suppressed. In particular, in the present embodiment, the upper support member 41 (the shaft 45) is coupled to the closing link 91 on both sides in the X direction with respect to the pair of closing springs 31. Therefore, the inclination of the upper support member 41 when viewed from the Y direction is less likely to occur than the inclination when viewed from the X direction. In other words, the upper support member 41 is easily inclined when viewed from the X direction. Therefore, buckling of the pair of closing springs 31 can be effectively suppressed by suppressing the inclination of the upper support member 41 when viewed from the X direction.

The lower roller 71 and the upper roller 72 are formed so as to be lockable in the X direction with respect to the edge 66 of the guide groove 65. According to this configuration, since the displacement of the lower roller 71 and the upper roller 72 in the X direction is restricted, the shake of the upper support member 41 in the X direction can be suppressed. Therefore, the displacement of the pair of on springs 31 when the spring force is released can be stabilized. Therefore, the on operation of the switchgear operation device 1 can be stabilized.

The pair of closing springs 31 are disposed in line symmetry with respect to a virtual line parallel to the respective center axes. With this configuration, the distribution of the load of the pair of closing springs 31 applied to the upper support member 41 can be made rotationally symmetrical. This can suppress the upper support member 41 from tilting relative to the spring housing 61 and at least one of the pair of engaging springs 31 from buckling. Therefore, the on operation of the switchgear operation device 1 can be stabilized.

However, a frictional force and a force in the winding direction accompanying the torsional deformation of the wire material of the closing spring 31 act between the closing spring 31 and the upper support member 41. The closing spring 31 and the upper support member 41 are fixed to each other by the balance between the frictional force and the force of the torsional deformation. If the maximum static friction force is lower than the force of the torsional deformation, the upper end portion of the on spring 31 rotates in the winding direction with respect to the upper support member 41. In particular, during the closing operation, the moment when the surface pressure between the closing spring 31 and the upper support member 41 decreases due to the inertia of the upper support member 41 or the like may occur, and the maximum static friction force may be lower than the force of the torsional deformation. When the upper end portion of the closing spring 31 rotates in the winding direction with respect to the upper support member 41, the contact portion between each of the pair of closing springs 31 and the upper support member 41 is displaced. As a result, the symmetry of the distribution of the load of the pair of closing springs 31 applied to the upper support member 41 may be lost.

In the present embodiment, the upper rotation restricting structure 81 is provided in the upper support member 41, and the upper rotation restricting structure 81 restricts rotation of the closing spring 31 in the winding direction with respect to the upper support member 41. With this configuration, displacement of the contact portion between each of the pair of closing springs 31 and the upper support member 41 can be suppressed. Therefore, the variation in the distribution of the load of the pair of closing springs 31 applied to the upper support member 41 can be suppressed. Therefore, at least one of the pair of engaging springs 31 can be prevented from buckling due to the upper support member 41 being inclined with respect to the spring housing 61. Therefore, the on operation of the switchgear operation device 1 can be stabilized.

The upper rotation restricting structure 81 includes an upper pin 83, and the upper pin 83 protrudes from the upper support member 41 toward the closing spring 31 and is formed to be able to contact the end 33 of the wire of the closing spring 31. According to this configuration, the upper pin 83 is brought into contact with the end 33 of the wire of the closing spring 31, whereby the rotation of the upper end of the closing spring 31 with respect to the upper support member 41 can be restricted. In particular, since the coil spring tries to be torsionally deformed in a direction in which the number of turns increases as it expands, the rotation of the upper end portion of the closing spring 31 can be more reliably restricted during the closing operation by bringing the upper pin 83 into contact with the end portion 33 of the wire of the closing spring 31.

Even if the end of the closing spring 31 is supposed to float from the upper support member 41, the upper pin 83 protrudes from the upper support member 41, and therefore the upper pin 83 can be brought into contact with the end 33 of the wire of the closing spring 31. Therefore, the rotation of the upper end portion of the closing spring 31 with respect to the upper support member 41 can be more reliably regulated.

Even if the upper end portion of the closing spring 31 rotates in the direction in which the end portion 33 of the wire rod is separated from the upper pin 83, the upper pin 83 is pressed against the outer peripheral surface of the wire rod from the upper guide spacer 44 side as shown in fig. 8. Therefore, the rotation of the upper end portion of the on spring 31 can be restricted. In particular, the coil spring tries to be torsionally deformed in a direction in which the number of turns is reduced as it contracts. Therefore, when the closing spring 31 is compressed, the end 33 of the wire is easily separated from the upper pin 83, and the above-described effect is easily obtained.

In the present embodiment, since the guided portion 70 also suppresses buckling of the pair of closing springs 31, the occurrence of a phenomenon in which the force of the torsional deformation increases rapidly with buckling of the closing springs 31 is suppressed. Therefore, even with the structure in which the upper pin 83 is press-fitted and fixed to the upper guide spacer 44, the rotation of the closing spring 31 in the winding direction can be sufficiently restricted by the upper pin 83.

In addition, although the operational effects of the upper rotation restricting structure 81 are described above, the same operational effects are also exerted on the lower rotation restricting structure 82.

In the present embodiment, the closing spring portion 5 includes a pair of closing springs 31. The closing spring unit 5 needs energy for charging the spring force of the breaking spring 11 in addition to energy for closing the switchgear 100. If the closing spring portion includes a single closing spring, the size of the closing spring increases to increase the occupied space in order to secure the required energy. Further, the closing spring is difficult to manufacture with an increase in size, and the versatility is reduced. Therefore, according to the present embodiment, a common spring can be used as the closing spring 31, and the occupied space of the closing spring portion 5 can be reduced.

In the present embodiment, the upper pin 83 protrudes from the upper guide spacer 44, but may protrude from the upper positioning spacer 43, for example. The same applies to the lower pin 84.

In the present embodiment, the rotation restricting structure 80 includes the upper rotation restricting structure 81 and the lower rotation restricting structure 82, but may include only one of the upper rotation restricting structure 81 and the lower rotation restricting structure 82.

(second embodiment)

Fig. 9 is a front view showing the vicinity of the upper end of the on spring according to the second embodiment. Fig. 10 is a front view showing the vicinity of the lower end portion of the closing spring according to the second embodiment.

In the first embodiment, the upper rotation restricting structure 81 includes the upper pin 83 contactable with the end 33 of the wire of the energizing spring 31. The lower rotation restricting structure 82 includes a lower pin 84 that can contact the end 33 of the wire of the closing spring 31. In contrast, the second embodiment is different from the first embodiment in that: the upper rotation restricting structure 81A includes a thick surface portion 85 provided at a contact portion between the upper support member 41 and the contact spring 31, and the lower rotation restricting structure 82A includes a thick surface portion 86 provided at a contact portion between the lower support member 51 and the contact spring 31. The configuration other than that described below is the same as that of the first embodiment.

As shown in fig. 9, the upper rotation restricting structure 81A is provided on both the closing spring 31 and the upper support member 41. The upper rotation restricting structure 81A has a thick surface portion 85 provided at a contact portion between the closing spring 31 and the upper support member 41. The thick surface portion 85 is provided on the support surface 32 of the upper end portion of the closing spring 31 and the lower surface of the upper guide spacer 44 of the upper support member 41. The rough surface portion 85 has a surface roughness larger than that of the smooth surface. For example, the rough surface portion 85 is a surface having a surface roughness larger than that of a mirror surface. For example, the rough surface portion 85 is a textured surface. The surface roughness of the rough surface portion 85 may be different between the support surface 32 of the upper end portion of the contact spring 31 and the lower surface of the upper guide spacer 44 of the upper support member 41.

As shown in fig. 10, the lower rotation restricting structure 82A is provided on both the closing spring 31 and the lower support member 51. The lower rotation restricting structure 82A has a thick surface portion 86 provided at a contact portion between the closing spring 31 and the lower support member 51. The thick surface portion 86 is provided on the support surface 32 of the lower end portion of the closing spring 31 and the upper surface of the lower guide spacer 53 of the lower support member 51. The rough surface portion 86 of the lower rotation restricting structure 82A is formed in the same manner as the rough surface portion 85 of the upper rotation restricting structure 81A.

In the present embodiment, the upper rotation restricting structure 81A is provided in the closing spring 31 and the upper support member 41, and restricts rotation of the closing spring 31 in the winding direction with respect to the upper support member 41, and the upper rotation restricting structure 81A is provided. With this configuration, the same operational effects as those of the first embodiment can be achieved.

The upper rotation restricting structure 81A has a thick surface portion 85 provided at a contact portion between the closing spring 31 and the upper support member 41. According to this configuration, the frictional force between the closing spring 31 and the upper support member 41 can be increased as compared with a configuration in which the contact portion between the closing spring and the upper support member is a smooth surface. Therefore, the rotation of the upper end portion of the closing spring 31 with respect to the upper support member 41 can be restricted. Therefore, the on operation of the switchgear operation device 1 can be stabilized.

Further, if one of the rough surface portions 85 of the closing spring 31 and the upper support member 41 contacts the other, the rotation of the upper end portion of the closing spring 31 with respect to the upper support member 41 can be restricted. Therefore, even if the contact position between the closing spring 31 and the upper support member 41 is displaced from the predetermined position, the rotation of the upper end portion of the closing spring 31 with respect to the upper support member 41 can be restricted. Therefore, the on operation of the switchgear operation device 1 can be stabilized.

In addition, although the operational effects of the upper rotation restricting structure 81A are described above, the same operational effects are also exerted on the lower rotation restricting structure 82A.

In the present embodiment, in the upper rotation restricting structure 81A, the rough surface portion 85 is provided on both the closing spring 31 and the upper support member 41. But is not limited thereto. The thick surface portion may be provided only on one of the closing spring 31 and the upper support member 41. The same applies to the rough surface portion 86 of the lower rotation restricting structure 82A.

In each of the above embodiments, the guided portion 70 includes a rotatable lower roller 71 and an upper roller 72. However, the guided portion may include a member that is capable of contacting the edge 66 of the guide groove 65 and is incapable of rotating, instead of at least one of the lower roller 71 and the upper roller 72.

In each of the above embodiments, the guided portions 70 are provided on both sides in the X direction with respect to the pair of closing springs 31. However, the guided portion 70 is not limited to this, and may be provided only on one of the pair of closing springs 31 in the X direction. That is, the upper roller 72 may be provided only above one of the lower rollers 71.

In the above embodiments, the frame 2 has been described as a component different from the lower support member 51, but the frame 2 may be included in the component of the lower support member. The upper guide spacer 44 of the upper support member 41 and the lower guide spacer 53 of the lower support member 51 may be omitted.

In each of the above embodiments, the upper support member 41 includes the pair of upper guide spacers 44, but the pair of upper guide spacers 44 may be integrated. The same applies to the pair of lower guide spacers 53 of the lower support member 51.

In addition, the first embodiment and the second embodiment may be combined. For example, the upper rotation restricting structure may include both the upper pin 83 and the thick surface portion 85.

According to at least one embodiment described above, the operating device for a switchgear includes a guided portion supported by the upper support member, arranged in the guide groove, and having a lower roller and an upper roller that can contact the edge of the guide groove. According to this configuration, the upper support member can be prevented from tilting during compression of the pair of closing springs during the charging operation of the spring forces of the pair of closing springs. Therefore, the pair of on springs are uniformly contracted without buckling, and hence the time required for releasing the spring force between the pair of on springs becomes uniform. Therefore, the switchgear operation device capable of performing smooth on operation can be provided.

According to at least one embodiment described above, the operating device for a switchgear includes a rotation restricting structure that restricts rotation in a winding direction of the pair of on springs with respect to at least one of the upper support member and the lower support member. With this configuration, displacement of the contact portion between each of the pair of engaging springs and the support member can be suppressed. Therefore, the variation in the distribution of the load of the pair of closing springs applied to the support member can be suppressed. Therefore, the support member is prevented from being inclined and at least one of the pair of closing springs is prevented from being buckled. Therefore, the on operation of the switchgear operating device can be stabilized.

Several embodiments of the present invention have been described, but these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various ways, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

Claims

1. An operation device for a switchgear includes:

a pair of compression springs arranged side by side in a predetermined direction and generating an urging force for moving a movable electrode of a switching device movable between an on position where the movable electrode of the switching device is in contact with a fixed electrode of the switching device and an off position where the movable electrode of the switching device is separated from the fixed electrode to the on position;

a compression spring support mechanism having: a first support member that supports the first end portions of the pair of compression springs together as a movable end; a second support member that supports second end portions of the pair of compression springs as fixed ends; and a spring housing portion formed with at least one guide groove extending in a direction of expansion and contraction of the pair of compression springs; and

and at least one guided portion supported by the first support member, arranged in the at least one guide groove in the telescopic direction, and having a first contact member and a second contact member capable of contacting with an edge of the at least one guide groove.

2. The operating device for a switchgear according to claim 1,

at least one of the first contact member and the second contact member includes a roller capable of rolling or sliding on an edge of the at least one guide groove.

3. The operating device for a switchgear according to claim 1 or 2,

the at least one guide groove includes:

a first guide groove formed on a first side in the predetermined direction with respect to the pair of compression springs; and

a second guide groove formed on a second side in the predetermined direction with respect to the pair of compression springs,

the at least one guided portion includes:

a first guided portion provided corresponding to the first guide groove; and

and a second guided portion provided corresponding to the second guide groove.

4. The operating device for a switchgear according to any one of claims 1 to 3,

the first contact member and the second contact member are in contact with an edge of the at least one guide groove in a direction orthogonal to the expansion/contraction direction and the predetermined direction, respectively.

5. The operating device for a switchgear according to claim 4,

the first contact member and the second contact member are each formed so as to be lockable to an edge of the at least one guide groove in the predetermined direction.

6. The operating device for a switchgear according to any one of claims 1 to 5,

the rotation restricting structure is provided on at least one of the pair of compression springs and at least one of the first support member and the second support member, and restricts rotation of the pair of compression springs in a winding direction with respect to the one support member.

7. An operation device for a switchgear includes:

a compression spring support mechanism having: a first support member that supports first end portions of the pair of compression springs as movable ends; and a second support member that supports second end portions of the pair of compression springs as fixed ends; and

and a rotation restriction structure provided to at least one support member of the pair of compression springs and at least one support member of the first support member and the second support member, the rotation restriction structure restricting rotation of the pair of compression springs in a winding direction with respect to the one support member.

8. The operating device for a switchgear according to claim 6 or 7,

the pair of compression springs has a first compression spring and a second compression spring,

the rotation restricting structure has a first convex portion and a second convex portion provided to the one support member,

the first convex portion protrudes from the one support member toward the first compression spring side and is formed to be contactable with an end portion of a wire material of the first compression spring,

the second convex portion protrudes from the one support member toward the second compression spring side, and is formed to be contactable with an end portion of the wire material of the second compression spring.

9. The operating device for a switchgear according to claim 6 or 7,

the rotation restricting structure has a rough surface portion provided at a contact portion between the one support member and each of the pair of compression springs.